Structural characteristics of temperature and humidity control test chamber
Suitable for various small electrical appliances, instruments, materials, and components for wet heat testing, it is also suitable for conducting aging tests. This test chamber adopts the most reasonable structure and stable and reliable control method currently available, making it aesthetically pleasing, easy to operate, safe, and with high precision in temperature and humidity control. It is an ideal equipment for conducting constant temperature and humidity tests.
(1) The test box body is in the form of an integral structure, with the refrigeration system located at the lower rear of the box and the control system located at the upper part of the test box.
(2) Inside the air duct interlayer at one end of the studio, there are devices such as heaters, refrigeration evaporators, and fan blades distributed; On the left side of the test box, there is a Ø 50 cable hole, and the test box is a single door (stainless steel embedded door handle)
(3) The double-layer high temperature and anti-aging silicone rubber seal can effectively ensure the temperature loss of the test chamber
(4) There are observation windows, frost prevention devices, and switchable lighting fixtures on the box door. The observation window adopts multi-layer hollow tempered glass, and the inner adhesive sheet conductive film is heated and defrosted. The lighting fixtures adopt imported brand Philips lamps, which can effectively observe the experimental changes in the studio from all angles.
The refrigeration cycle of the temperature and humidity control box adopts the reverse Carnot cycle, which consists of two isothermal processes and two adiabatic processes. The process is as follows: the refrigerant is adiabatically compressed to a higher pressure by the compressor, and the work consumed increases the exhaust temperature. Then, the refrigerant exchanges heat with the surrounding medium through the condenser and transfers heat to the surrounding medium. After the refrigerant undergoes adiabatic expansion through the shut-off valve, the temperature of the refrigerant decreases. Finally, the refrigerant absorbs heat from the object at a higher temperature through the evaporator, causing the temperature of the cooled object to decrease. This cycle repeats itself to achieve the goal of cooling down.
The refrigeration system design of this test chamber applies energy regulation technology, which can ensure the normal operation of the refrigeration unit and effectively adjust the energy consumption and refrigeration capacity of the refrigeration system, so as to maintain the refrigeration system in the optimal operating state. By using Balanced Temperature Control (BTC), the control system automatically calculates the output of the heater based on the set temperature point through PID calculation when the refrigeration system is working continuously, ultimately achieving a dynamic balance.
Dear customer:
Hello, our company is a high-quality development team with strong technical strength, providing high-quality products, complete solutions, and excellent technical services to our customers. The main products include walk-in constant temperature and humidity testing chambers, UV accelerated aging testing machines, rapid temperature change testing chambers, walk-in environmental testing chambers, UV aging testers, constant temperature and humidity chambers, etc. Our company adheres to the principle of building a business with integrity, maintaining quality, and striving for progress. With a more determined pace, we continuously climb new heights and contribute to the national automation industry. We welcome new and old customers to confidently choose the products they like. We will serve you wholeheartedly!
A Brief Analysis of the Five Characteristics of Walk in Laboratories
The walk-in laboratory has been upgraded on the basis of the original walk-in laboratory, with the characteristics of large testing space and operators being able to operate the test products in the laboratory, providing conditions for temperature and humidity environment testing for industrial manufacturers' batch or large parts, semi-finished products, and finished products. Adopting advanced Chinese LCD display screen touch screen, various complex program settings can be carried out. The program settings adopt dialogue mode, and the operation is simple and fast. It can achieve automatic operation of the refrigeration machine, maximizing automation, and can be equipped with LAN communication interfaces for users to remotely process and centrally control. It can record temperature and temperature parameters for 90 days, and is equipped with a paperless recorder.
5 characteristics of walk-in laboratory
1. Having an extremely wide temperature and humidity control range, it can meet various needs of users. By adopting a unique balanced temperature and humidity control method, a safe and precise temperature and humidity environment can be achieved. Having stable and balanced heating and humidification performance, it can achieve high-precision and highly stable temperature and humidity control.
2. Equipped with high-precision intelligent temperature regulators, temperature and humidity are displayed using LED digital display. Optional temperature and humidity recorder.
3. The refrigeration circuit is automatically selected, and the automatic control device has the performance of automatically selecting and operating the refrigeration circuit according to the set value of temperature, achieving direct start of the refrigeration machine and direct cooling under high temperature conditions.
4. The inner door is equipped with a large observation window, which facilitates the observation of the experimental status of the test samples.
5. Equipped with advanced safety and protection devices - residual current circuit breaker, over temperature protector, phase loss protector, and water cut-off protector.
Dear customer:
Our company has products such as rapid temperature change test chambers, UV accelerated weather resistance testing machines, and temperature and humidity control chambers. You can call our service hotline through our website to learn more about our products. Our pursuit is endless, and we welcome new and old customers to choose their favorite products with confidence. We will be dedicated to serving you!
The walk-in high and low temperature (humid and hot) laboratory also needs maintenance
Reminder: Remember to maintain the walk-in high and low temperature (humid and hot) laboratory as well!
1. The temperature and humidity testing system of the walk-in high and low temperature (humid and hot) laboratory must be operated and maintained by a dedicated person. Strictly follow the operating procedures of the system and avoid others from operating the system illegally.
2. Long term shutdown of the walk-in high and low temperature (humid and hot) laboratory can affect the effective service life of the system. Therefore, the system should be turned on and operated at least once every 10 days; Do not repeatedly stop the system in a short period of time. The number of starts per hour should be less than 5 times, and the time interval between each start stop should not be less than 3 times; Do not open the door of the walk-in temperature and humidity testing system at low temperatures to prevent damage to the door sealing tape.
3. A system usage file should be established to facilitate system maintenance and repair. The use of archives should record the start and end time (date) of each system operation, the type of experiment, and the ambient temperature; When the system malfunctions, provide a detailed description of the fault phenomenon as much as possible; The maintenance and repair of the system should also be recorded in as much detail as possible.
4. Conduct a monthly main power switch (leakage circuit breaker) operation test to ensure that the switch is used as a leakage protector while meeting the load capacity. The specific steps are as follows: first, please confirm that the main power switch is turned to "ON", which means the system is powered on, and then press the test button. If the switch lever of the residual current circuit breaker falls down, this function is normal.
5. The main box of the walk-in temperature and humidity testing system should be protected during use and should not be subjected to strong impacts from sharp or blunt objects.
6. To ensure the normal and clean supply of cooling water, the cooling water filter of the refrigeration unit should be cleaned every 30 days. If the local air quality is poor and the dust content in the air is high, the cooling water tower reservoir should generally be cleaned every 7 days.
7. The leakage, overload, and short-circuit protection characteristics of the residual current switch are set by Lab Companion manufacturer and cannot be adjusted arbitrarily during use to avoid affecting performance; After the leakage switch is disconnected due to a short circuit, the contacts need to be checked. If the main contacts are severely burned or have pits, maintenance is required.
8. The test products placed in the walk-in temperature and humidity testing system should be kept at a certain distance from the suction and exhaust ports of the air conditioning channel to avoid obstructing air circulation.
9. Overtemperature protector action test. Set the temperature of the over temperature protector to be lower than the temperature of the box. If there is an E0.0 alarm and buzzing sound, it indicates that its function is normal. After completing the above experiment, the temperature protection setting should be reset appropriately, otherwise it may cause inappropriate termination.
10. Once a year, use a vacuum cleaner to clean and remove dust from the distribution room and water circuit room. Once a month, use a dry cloth to clean the accumulated water in the water tray of the refrigeration unit.
Maintenance of refrigeration compressor for constant temperature and humidity test chamber, cold and hot shock test chamber
Article summary: For environmental monitoring equipment, the only way to maintain long-term and stable use is to pay attention to maintenance in all aspects. Here, we will introduce the maintenance of the compressor, which is an important component of the constant temperature and humidity test chamber and the cold and hot shock test chamber
Detailed content:
Maintenance plan for refrigeration compressor:
As the core component of the refrigeration system in the constant temperature and humidity test chamber, the maintenance of the compressor is essential. Guangdong Hongzhan Technology Co., Ltd. introduces the daily maintenance steps and precautions for the compressor in the constant temperature and humidity test chamber and the cold and hot shock test chamber
1、 Carefully check the sound of the cylinders and moving parts at all levels to determine if their working condition is normal. If any abnormal sound is found, immediately stop the machine for inspection;
2、 Pay attention to whether the indicated values of pressure gauges at all levels, pressure gauges on gas storage tanks and coolers, and lubricating oil pressure gauges are within the specified range;
3、 Check if the temperature and flow rate of the cooling water are normal;
4、 Check the supply of lubricating oil and the lubrication system of the moving mechanism (some compressors are equipped with organic glass baffles on the side of the cross head guide rail of the machine body),
You can directly see the movement of the crosshead and the supply of lubricating oil; The cylinder and packing can be inspected for oil discharge using a one-way valve, which can check if the oil injector is inserted into the cylinder
Oil injection situation;
5、 Observe whether the oil level in the body oil tank and the lubricating oil in the oil injector are below the scale line. If they are low, they should be refilled in a timely manner (if using a dipstick, stop and check);
6、 Check the temperature of the intake and exhaust valve covers at the cross guide rail of the crankcase with your hand to see if it is normal;
7、 Pay attention to the temperature rise of the motor, bearing temperature, and whether the readings on the voltmeter and ammeter are normal. The current should not exceed the rated current of the motor. If it exceeds the rated current, the cause should be identified or the machine should be stopped for inspection;
8、 Regularly check whether there are any debris or conductive objects inside the motor, whether the coil is damaged, and whether there is friction between the stator and rotor, otherwise the motor will burn out after starting;
9、 If it is a water-cooled compressor and water cannot be immediately supplied after the water is cut off, it is necessary to avoid cylinder cracking due to uneven heating and cooling. After parking in winter, the cooling water should be drained to prevent freezing and cracking of the cylinder and other parts;
10、 Check whether the compressor vibrates and whether the foundation screws are loose or detached;
11、 Check whether the pressure regulator or load regulator, safety valve, etc. are sensitive;
12、 Pay attention to the hygiene of the compressor, its associated equipment, and the environment;
13、 Gas storage tanks, coolers, and oil-water separators should regularly release oil and water;
14、 The lubricating machine used should be filtered by sedimentation. Differentiate the use of compressor oil between winter and summer
EC-85EXT, Superior constant temperature bath (800L)Specifications
Project
Type
Series
ＥＸＴ
Function
Temperature occurs in a way
Dry ball method
Temperature range
-70 ～ + 150 ℃
Temperature variation amplitude
Below the + 100℃
± 0.3 ℃
Above the + 101℃
± 0.5 ℃
Temperature distribution
Below the + 100℃
± 0. 7 ℃
Above the + 101℃
± 1.0 ℃
The temperature drops the time
＋125 ～－55 ℃
Within 36 minutes (10℃ / minute mean temperature change)
Temperature rise time
－55 ～＋125 ℃
Within 36 minutes (10℃ / minute mean temperature change)
The internal volume of the uterus was tested
800Ｌ
Test room inch method (width, depth and height)
1000mm × 800mm × 1000mm
Product inch method (width, depth and height)
1470mm × 2240mm × 2000mm
Make the material
External outfit
Test room control panel
machine room
Cold interductile steel plate is dark gray
Inside
Stainless steel plate (SUS304,2B polished)
Broken heat material
Test room
Hard synthetic resin
glass wool
door
Hard synthetic resin foam cotton, glass cotton
Project
Type
Series
ＥＸＴ
Cooling dehumidifying device
Cooling-down method
Mechanical section shrinkage and freezing mode and binary freezing mode
Cooling medium
Single segment side
R404A
Binary high temperature / low temperature side
R404A ／ R23
Cooling and dehumidifier
Multi-channel mixed heat sink type
The condenser
(water-cooled)
Calorifier
Form
Nickel-chromium heat-resistant alloy heater
Blower
Form
Stir fan
Controllerl
The temperature is set
-72.0 ～ +152.0 ℃
Time setting Fanny
0 ～ 999 Time 59 minutes (programmed type)0 ～ 20000 Time 59 minutes (value)
Set decomposition energy
Temperature 0.1 ℃ ，Time of 1 minute
Indicate accuracy
Temperature ± 0.8℃ (typ.), time ± 100 PPM
Vacation type
Value or program
Stage number
20-stage / 1 program
The number of procedures
The maximum number of incoming force (RAM) programs is 32 programs
The maximum number of internal ROM programs is 13 programs
Round-trip number
Maximum of 98 or unlimited
Number of round-trip repeats
Maximum 3 time
Displace the end
Pt 100Ω （ at 0 ℃ ），grade （ JIS C 1604-1997 ）
Control action
When splitting the PID action
Endovirus function
Early delivery function, standby function, setting value maintenance function, power outage protection function,
Power action selection function, maintenance function, transportation round-trip function,
Time delivery function, time signal output function, overrising and overcooling prevention function,
Abnormal representation function, external alarm output function, setting paradigm representation function,
Transport type selection function, the calculation time represents the function, the slot lamp lamp function
Project
Type
Series
ＥＸＴ
Control panel
Equipment machine
LCD operating panel (type contact panel),
Represents lamp (power, transport, abnormal), test power supply terminal, external alarm terminal,
Time signal output terminal, power cord connector
Protective device
Refrigerating cycle
Overload protection device, high blocking device
Calorifier
Temperature over-rise protection device, temperature fuse
Blower
Overload protection device
Control panel
Leakage breaker for power supply, fuse (heater,),
Fuse (for operating loop), temperature rise protection device (for testing),
Temperature rise overcooling prevention device (test material, in microcomputer)
Pay belongs to the product
Test material shed shed by * 8
Stainless steel shed (2), shed receiving (4)
Fuse
Operating loop Protection Fuses (2)
Operating specification
（1 ）
Else
Bolus (Cable hole: 1)
Equipment products
Adventitia
Hard borosilicate glass270mm× 190mm
１
Cable hole
Bore size 50mm
１
The trough inside the lamp
AC100V 15W White hot ball
１
Wheel
6
Horizontal adjustment
6
Electrovirus characteristics
Source ＊ 5.1
AC Three-phase 380V 50Hz
Maximum load current
60 A
Capacity of the leakage breaker for the power supply
80A
Sensory current 30mA
Power distribution thickness
60mm２
Rubber insulation hose
Coarseness of grounding wire
14mm２
Cooling water ＊ 5.3
Water yield
5000 L /h （When the cooling water inlet temperature is 32℃）
Water pressure
0.1 ～ 0.5MPa
Side pipe diameter of the device
PT1 1/4
Tubing
drain-pipe ＊ 5.4
PT1/2
Product weight
700kg
EC-85MHPM-W, High load corresponding constant temperature and humidity tank (800L)
Project
Type
Series
ＭＨＰＭ－Ｗ
Function
Temperature and humidity mode
The way of wet ball
Temperature range
-40 ～ + 100 ℃
Humidity range
20 ～ 98%RH
（According to the anaphase 3 items）
Changes in temperature and humidity
± 0.3 ℃ ／ ±2.5%RH
Temperature and humidity distribution
± 0.5 ℃ ／ ±5.0%RH
The temperature drops the time
+20 ～ -40 ℃
Within 75 minutes
Temperature rise time
-40 ～ + 100 ℃
Within 50 minutes
The internal volume of the uterus was tested
800 Ｌ
Test room inch method (width, depth and height)
1000mm × 800mm × 1000mm
Product inch method (width, depth and height)
1400mm × 1190mm × 1795mm
Make the material
External outfit
Test room control panel
machine room
Cold steel plate, cold steel plate beige
(Color table 2.5Y8 / 2)
Inside
Stainless steel plate (SUS304,2B polished)
Broken heat material
Test room
Hard synthetic resin
―
Door
Hard synthetic resin foam cotton, glass cotton
Project
Type
Series
ＭＨＰＭ－Ｗ
Cooling removal, wet device
Cooling-down method
Mechanical section shrinkage mode
Cooling medium
Ｒ４０４Ａ
The oneself can shrink machine
Output (number of staff)
1.5kW （１）
Cooling and dehumidifier
Multi-channel mixed heat sink type
The condenser
Multi-channel mixed radiator sink (air cooling）
Calorifier
Form
Nickel-chromium heat-resistant alloy heater
Volume
3.5kW
Humidifier
Form
Steam generation
Volume
1.8Kw×2
Blower
Form
Multi-channel mixed radiator sink (air cooling）
Motor capacity
40W
Feed water unit
The water supply cylinder Water supply method
Water quality
Pure water ＊ Automatic water supply
（"Please refer to the automatic water supply."）
Volume
Gravity type
Moisturizing disk
Gravity type
Controller
Temperature setting range
-42.0 ～ + 102.0 ℃
Humidity setting range
0 ～ 98%RH （Dry Bulb Temperature 10 ～ 85 ℃ ）
Time set range
0 ～ 999Time of 59 min（Program setting type） 0 ～ 20000 Time of 59 min（The value type）
Set decomposition energy
Temperature 0.1℃, humidity 1% RH for 1 min
Indicate accuracy
Temperature ± 0.8℃ (tp.), humidity ± 1% RH (tp.), time ± 100 PPM
Vacation type
Value or program
Stage number
20-stage / 1 program
The number of procedures
The maximum number of incoming force (RAM) programs is 32 programs
The maximum number of internal ROM programs is 13 programs
Round-trip number
98 times maximum or unlimited
Number of round-trip repeats
Maximum 3 heavy
Displace the end
Pt 100Ω （ at 0 ℃ ）， grade Ｂ（ JIS C 1604-1997 ）
Control action
When splitting the PID action
Internal function
Early delivery function, standby function, setting value maintenance function, power outage protection function,
Power action selection function, maintenance function, transportation round-trip function,
Time delivery function, time signal output function, overrising and overcooling prevention function,
Abnormal representation function, external alarm output function, setting paradigm representation function,
Transport type selection function, the calculation time represents the function, the slot lamp lamp function
Project
Type
Series
ＭＨＰＭ－Ｗ
Control panel
Equipment machine
LCD operating panel (type contact panel),
Represents lamp (power, transport, abnormal), test power supply terminal, external alarm terminal,
Time signal output terminal, power cord connector
Protective device
Refrigerating cycle
Overload protection device, high blocking device
Calorifier
Temperature over-rise protection device, temperature fuse
Humidifier
Air burning prevention device, humidifying disc water level regulator
Blower
Overload protection device
Control panel
Leakage breaker for power supply, fuse (for heater, humidifier),
Fuse (for operating loop), temperature rise protection device (for testing),
Temperature rise overcooling prevention device (test material, in microcomputer)
Offproducts (sets)
House receiver (4), house board (2), wet ball wick (15), operation manual (1)
Equipment products
Adventitia
Hard borosilicate glass 800mm× 800mm
2
Cable hole
Bore size 50mm
１
The trough inside the lamp
AC100V 15W White hot ball
２
Wheel
４
Horizontal adjustment
４
Electrovirus characteristics
Source
AC three-phase 380V 50Hz
Maximum load current
25A
Capacity of the leakage breaker for the power supply
50A
Sensory current 30mA
Power distribution thickness
14mm2
Rubber insulation hose
Coarseness of grounding wire
5.5mm2
Tubing
Drain-pipe
PT1/2
Product quality
550kg
High, low temperature, and low pressure test chamber
The low-pressure test chamber is mainly used in the fields of aviation, aerospace, information, electronics, etc., to determine the environmental adaptability and reliability tests of instruments, electrical products, materials, components, and equipment under single or simultaneous effects of low-pressure, high-temperature, and low-temperature, and to measure the electrical performance parameters of the test piece when energized.
Product principle and function
The high, low temperature, and low pressure test chamber is mainly used in aviation, aerospace, electronics, national defense, scientific research, and other industrial sectors to determine the storage and transportation reliability test of electrical and electronic products (including components, materials, and instruments) under the single or simultaneous action of high, low temperature, and low pressure. It can also be used to test the electrical performance parameters of the specimens when they are energized.
Editing of structural device for high, low temperature and low pressure test chamber
1. The outer shell is made of cold-rolled steel plate sprayed with plastic or stainless steel, and the inner shell is made of stainless steel
2. Thermal insulation layer: ultra-fine glass wool and hard polyurethane
3. Cooling method: Compression cooling method (air-cooled condenser)
4. Refrigerator: Original French Taikang fully enclosed compressor unit
5. Heater: grade stainless steel fin heater
6. Convection system: Multi blade fan, air conditioning dedicated motor
7. Temperature controller: Digital intelligent temperature controller, using PT-l00 sensor for temperature control.
8. The arrangement of electrical components in the control cabinet is reasonable, the wiring is neat, and labeled sheathed wiring terminals are used.
9. Castor solenoid valve, Danfoss expansion valve
10. High quality vacuum pump
Editing of vacuum system for high, low temperature and low pressure test chamber
1. Composition of vacuum system: The vacuum system is a component that obtains and measures the vacuum degree, consisting of a vacuum measurement system and a vacuum acquisition unit
2. Vacuum measurement: Vacuum measurement is carried out using a pressure sensor. This vacuum gauge uses pressure strain to achieve vacuum measurement, and the measurement data is a linear electrical signal that can be directly input into the device controller for display and control
environment condition
Temperature: 5 ℃~+28 ℃ (average temperature within 24 hours ≤ 28 ℃)
Relative humidity: ≤ 85% RH
Air pressure: 86kPa~106kPa
Power supply conditions: three-phase four wire+protective ground wire, voltage range: AC (380 ± 38) V
Allowable frequency fluctuation range: (50 ± 0.5) Hz
The grounding resistance of the protective grounding wire is less than 4 Ω
Technical specifications of high, low temperature and low pressure test chamber
1. Studio size:
FA-4 4 cu ft (113L)
-73°C to +177°C
N/A
FA-10 10 cu ft (283L)
-73°C to +177°C
20% to 95%RH
FA-16 16 cu ft (453L)
-73°C to +177°C
20% to 95%RH
FA-35 35 cu ft (991L)
-73°C to +177°C
20% to 95%RH
FA-64 64 cu ft (1812L)
-73°C to +177°C
20% to 95%RH
FA-96 96 cu ft (2718L)
-73°C to +177°C
20% to 95%RH
2. Temperature range: -40~150 ℃
3. Temperature deviation: ± 2 ℃
4. Temperature fluctuation: ± 0.5 ℃
5. Temperature uniformity: ≤ 2 ℃
6. Air pressure level: 4-84kpa
7. Heating rate 1.0-3.0 ℃/min
8. Cooling rate 0.7-1.0 ℃/min
9. Control system controller Siemens PLC controller, Siemens color LCD display touch screen
10. Accuracy Range Setting Accuracy: Temperature ± 0.1 ℃, Indication Accuracy: Temperature ± 0.1 ℃, Resolution: ± 0.1 ℃
11. Temperature sensor platinum resistance PT100 Ω/MV
12. Pressure Sensor Electronic Pressure Transmitter
13. Fully independent heating system, nickel chromium alloy electric heating heater
14. Refrigeration system: original French "Taikang" fully enclosed air-cooled single-stage/cascade compressor refrigeration method
15. Temperature resistant and low-noise air conditioning motor for circulation system. Multi blade centrifugal fan
Safety protection device
1. Overload and short circuit protection
2. Overtemperature protection
3. High and low pressure protection of refrigeration unit
4. Alarm sound prompt
Description of Controller Q8-902 for High Low Temperature and Low Pressure Test Chamber
Operating interface
Touchscreen Chinese interface, with digital display, real-time curve, operation selection, timing setting, program setting, alarm, parameter setting and other interfaces
Curve recording function
Can save the set values, sampling values, and sampling time of the device; The maximum storage time is 30 days. Simultaneously storing 5 real-time curves with different capacities and resolutions for 30 days, 7 days, 24 hours, 8 hours, and 1 hour, and displaying real-time data to meet different user needs
Printing function
Connectable micro printer (optional)
Program capacity
Program: Up to 30 curves
Program segment: Each program can have up to 50 segments (total program segment 1200 segments)
Program segment grouping: Each curve can be further grouped into segments according to any continuous segment, up to a maximum of 10 segments can be combined, and segments are allowed to overlap
Internal loop: The program segments within the program are looped in sections as the minimum loop unit, with a maximum of 99 loops per section
Program loop: can loop up to 99 times
Program connection: After the program runs, it can connect to the selected next program
Related standards
In addition to the content specified in this technical requirement, the equipment meets the requirements of GB/T10591 and GB/T10592.
Data and Services
1. Provide technical information such as electrical schematics, consumable parts lists, operation and maintenance manuals for the equipment, as well as technical information for the main purchased supporting parts.
2. Train 1-2 equipment operation and maintenance personnel to fully master the operation skills and general repair and maintenance skills of the equipment.
Within one year from the date of acceptance of the equipment, free after-sales service shall be provided to the buyer, and after one year, accessories of the equipment shall be provided to the buyer at cost price.
Daily maintenance tips for high and low temperature test chambers and alternating high and low temperature test chambers
1. High and low temperature test chambers are generally relatively high, and we recommend placing them in a relatively benign temperature environment. Our experience temperature value is 8 ℃~23 ℃. For laboratories that do not have this condition, appropriate air conditioners or cooling towers must be equipped.
2. It is necessary to adhere to professional management by dedicated personnel. Units with conditions should periodically send dedicated personnel to the supplier's factory for training and learning, in order to gain more professional experience and ability in maintenance and repair Hongzhan Instrument.
3. Regularly clean the condenser every 3 months: For compressors that use air-cooled cooling, the condenser fan should be regularly inspected and the condenser should be cleaned and dusted to ensure good ventilation and heat transfer performance; For compressors that use water-cooled cooling, in addition to ensuring their inlet water pressure and temperature, it is also necessary to ensure the corresponding flow rate. Regular cleaning and descaling of the condenser interior is also necessary to obtain its continuous heat transfer performance.
4. Regularly clean the evaporator: Due to the different cleanliness levels of the test samples, a lot of small particles such as dust will accumulate on the evaporator under forced air circulation, and should be cleaned regularly.
5. Cleaning and balancing of circulating air blades and condenser fans: Similar to cleaning evaporators, due to the different working environments of the test chamber, many small particles such as dust may accumulate on the circulating air blades and condenser fans, and should be cleaned regularly.
6. Cleaning of waterway and humidifier: If the waterway is not smooth and the humidifier scales, it is easy for the humidifier to dry and burn, which may damage the humidifier. Therefore, it is necessary to regularly clean the waterway and humidifier.
7. After each experiment, set the temperature near the ambient temperature, work for about 30 minutes, then cut off the power and clean the inner wall of the workshop.
If the equipment needs to be relocated, it is best to do so under the guidance of technical personnel from Hongzhan Company to avoid unnecessary damage or damage to the equipment.
When the product is not in use for a long period of time, it should be powered on regularly every half month, and the power on time should not be less than 1 hour.
10. Maintenance principle:
Due to the fact that high and low temperature test chambers are mainly composed of electrical, refrigeration, and mechanical systems, once there is a problem with the equipment, a comprehensive inspection and analysis of the entire equipment system should be carried out.
Generally speaking, the process of analysis and judgment can start with "external" and then "internal", that is, after excluding external factors, the equipment can be systematically decomposed based on the fault phenomenon. Then, the system can be comprehensively analyzed and judged. Alternatively, the reverse reasoning method can be used to find the cause of the fault: first, check whether there is a problem with the electrical system according to the electrical wiring diagram, and finally check whether there is a problem with the refrigeration system. Before understanding the cause of the fault, it is not advisable to disassemble or replace components blindly to avoid unnecessary trouble.
The first natural environment icing test station in China, jointly built by Chongqing University and Huaihua Electric Power Bureau, has settled in Xuefeng Mountain!
On January 16th, the "Xuefengshan Natural Ice Cover Test Station" Insulator Ice Cover Test Technology Exchange Seminar, jointly organized by Chongqing University and Hunan Huaihua Electric Power Design Institute, was held in Huaihua. Experts in transmission and distribution lines and insulation technology from well-known universities across the country, as well as electrical experts from Japan's NGK company, gathered together to celebrate the official completion of the world's only and China's first natural ice cover test station in Huaihua, Hunan, and to discuss follow-up research matters.
At the meeting, Professor Jiang Xingliang, doctoral supervisor of Chongqing University, first expressed gratitude to Huaihua Electric Power Bureau and various units of the power system for their strong support and assistance in the basic design and construction of the experimental base. The attending experts listened to Associate Professor Zhang Zhijin's report on the construction of the Xuefengshan Natural Ice Cover Test Station and the 2009 Ice Cover Test, shared the ice observation and research results at the test base throughout 2009, and conducted in-depth discussions and research on the existing problems. After the meeting, experts also went to the "Xuefengshan Natural Ice Cover Test Station" for on-site investigation, and representatives expressed their affirmation of the site selection and the construction of the test station.
Professor Jiang Xingliang introduced that since the 2008 ice disaster, in order to prevent a large number of line disconnections, tower collapses, and ice flash accidents caused by severe icing, and to maintain the safe and stable operation of the power grid, the Ministry of Science and Technology of China has listed grid icing and protection technology as one of the important research topics of the National Key Basic Research and Development Plan (973 Plan). With the support of projects such as "Ice Cover, De icing, and Melting Mechanisms of Transmission Lines" by State Grid Corporation of China, Professor Jiang Xingliang's research team conducted a comprehensive investigation of typical ice cover conditions in China, analyzed and compared ice cover phenomena and micro meteorology in Liupanshui, Guizhou, Qinling Mountains, Shaanxi, Jingmen, Sichuan, and Lushan, Jiangxi. Based on the representativeness, duration, and transportation conditions of ice cover, it was determined to establish a "natural ice cover test base" in Xuefengshan, Hunan. It was believed that the natural conditions of Pingshantang in Xuefengshan and the technical strength of Huaihua Design Institute met the requirements for the construction of natural ice cover test bases. Finally, the site selection and cooperation partner were determined.
In 2009, Professor Jiang Xingliang, Associate Professor Zhang Zhijin, and Dr. Hu Jianlin, among other key members of the research group, led more than ten graduate students from the Department of High Voltage and Insulation Technology at Chongqing University to overcome various difficulties in work and life under harsh natural conditions. They worked together with the Huaihua Bureau Design Institute to build a natural experimental base while conducting experimental research. In the first year of the experiment, the icing, thawing, and de icing processes of six typical specifications of conductors commonly used in high voltage, ultra-high voltage, and ultra-high voltage transmission lines were studied. The icing processes of various types of insulators were observed and compared. Multiple technical measures to prevent conductor icing, such as mechanical and hydrophobic coatings, as well as coatings to prevent insulator icing and differences in insulator icing arrangements, were experimentally investigated. The twisting process and mechanism of conductor icing were analyzed, and the tension changes and ice wind load changes after conductor icing were analyzed. In addition, AC and DC icing tests were conducted in natural environments. A large amount of key experimental data was accumulated to overcome the world-class problem of power grid icing, and many effective studies and explorations were made.
Toshiyuki Nakajima, Chief Engineer of the Electric Power Division of NGK Corporation in Japan, stated in an interview with reporters during his inspection of the Xuefengshan Natural Ice Cover Test Station that he has been engaged in research on power grid ice cover in the United States for 10 years. Although international experts have conducted long-term research on power grid ice cover under laboratory artificial simulation conditions, they unanimously believe that there is a significant error between the ice cover form in the artificial simulation environment and the actual situation in the natural environment. The first natural ice cover test station built in Xuefengshan will undoubtedly greatly promote the research process of ice cover and melting mechanisms of transmission lines and the anti ice ability of power grids in China and internationally. He wishes his Chinese counterparts to soon obtain the foundation of ice cover on transmission lines in natural environments. Data fills the gap in international research in this field, Overcome the world-class challenge of power grid icing mechanism and anti icing technology as soon as possible.
Zhang Jiwu, President of the Design Institute of Huaihua Electric Power Bureau, stated that with the strong support of Secretary Liang Liqing of the Huaihua Electric Power Bureau Party Committee, the Xuefengshan Natural Ice Cover Test Station has been built in cooperation with Chongqing University. On the one hand, it can make its own contribution to the research on improving the ice resistance of the power grid and reflect the company's sense of social responsibility; On the other hand, it can also enhance its own technological strength and corporate reputation through cooperation and exchange, improve its external competitiveness, and achieve a win-win situation. It is a model of "industry university research" cooperation between enterprises and higher education institutions. (Shu Daisong and Zhang Deming)
Information source: Hunan Electric Power Company
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