CN114184810A - Water-cooling resistance test system - Google Patents
Water-cooling resistance test system Download PDFInfo
- Publication number
- CN114184810A CN114184810A CN202210144427.3A CN202210144427A CN114184810A CN 114184810 A CN114184810 A CN 114184810A CN 202210144427 A CN202210144427 A CN 202210144427A CN 114184810 A CN114184810 A CN 114184810A
- Authority
- CN
- China
- Prior art keywords
- water
- cooling
- pipeline
- water tank
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/08—Cooling, heating or ventilating arrangements
- H01C1/082—Cooling, heating or ventilating arrangements using forced fluid flow
Abstract
The invention discloses a water-cooling resistance test system which comprises a water supply pipeline and a water supply cooling pipeline, wherein the water supply pipeline comprises a water tank, a third water pump and a water inlet collecting pipe which are sequentially communicated according to the water flow direction, the water tank is communicated with the water outlet collecting pipe, a heating structure is arranged in the water tank, a second heat exchanger is arranged between the water supply pipeline and the water supply cooling pipeline, the water supply cooling pipeline is communicated with a cooling water tank, and the water temperature in the cooling water tank is lower than or equal to 5 ℃. The invention has the beneficial effects that: the water-cooling resistance test system provided by the scheme can recycle water resources, reduces waste, and has wide water supply temperature range and wide application range.
Description
Technical Field
The invention relates to the technical field of electronic component reliability analysis test equipment, in particular to a water-cooling resistance test system.
Background
In recent years, with the technological level of national defense and key engineering in China being improved continuously, the performance requirements of required electronic components are higher and higher. Reliability analysis test products of national military standard products, high-tech project products and newly developed products are various in types, and particularly, test reliability analysis is required for high-power resistors which need water cooling.
At present, manufacturers in China do not see complete special equipment for a small high-power resistor and a water-cooling resistor test system. In the past, the water-cooling heat dissipation of the similar small high-power resistor of our company adopts tap water to cool a radiator, and no special test equipment is provided.
The existing tap water is used for cooling the radiator, so that water resources are wasted, the environmental protection requirement cannot be met, and the water cooling test requirement of the high-power resistor cannot be met. Even if use general water-cooling unit to carry out circulating water cooling heat dissipation, the circulating water temperature range 5 ~ 75 +/-1 ℃ that can not satisfy the test system requirement is adjustable, and water flow measuring range: the measurement precision is +/-1.0% at 4-25L/min, and the maximum water supply pressure is as follows: 4bar, the total water cooling power can reach the technical requirements of 15Kw (the water supply temperature is more than or equal to 15 ℃), and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a water-cooling resistance test system which is wide in water supply temperature range and high in control precision.
The invention is realized by the following technical scheme: the utility model provides a water-cooling resistance test system, includes supply channel and water supply cooling pipeline, the supply channel includes water tank, third water pump and the pressure manifold of intaking that communicates in proper order according to the rivers direction, and the water tank intercommunication has a water pressure manifold, the water tank in be provided with the heating structure, supply channel and water supply cooling pipeline between set up at the second heat exchanger, water supply cooling pipeline intercommunication has cooling water tank, the temperature of the temperature in the cooling water tank is less than or equal to 5 ℃.
Furthermore, in order to better implement the present invention, a second tee is arranged between the third water pump and the water inlet collecting pipe, and the second tee is communicated with a pipeline between the water tank and the water outlet collecting pipe.
Furthermore, in order to better implement the present invention, the water inlet collecting pipe is communicated with a plurality of water inlet branch pipes, the water inlet branch pipes are provided with proportional two-way valves, at least two water inlet branch pipes are provided with a second pressure detection meter and a second temperature detection meter, the water outlet collecting pipe is communicated with a plurality of water outlet branch pipes, the water outlet branch pipes are provided with proportional two-way valves, at least two water outlet branch pipes are provided with a third pressure detection meter and a third temperature detection meter, and the number of the water outlet branch pipes is the same as that of the water inlet branch pipes.
Further, in order to better implement the present invention, the water inlet collecting pipe is connected with a first pressure detection meter and a first temperature detection meter.
Furthermore, in order to better realize the invention, the water supply cooling pipeline comprises a second water pump, an inlet and an outlet of the second water pump are respectively communicated with the cooling water tank, and the second heat exchanger is connected on a pipeline between the outlet of the second water pump and the cooling water tank.
Furthermore, in order to better realize the invention, a first tee joint is arranged between the second water pump and the second heat exchanger, and the first tee joint is communicated with a pipeline between the cooling water tank and the second heat exchanger.
Furthermore, in order to better realize the invention, the system also comprises a cooling pipeline and a refrigeration pipeline, wherein the refrigeration pipeline comprises a first water pump of which the inlet and the outlet are respectively communicated with the cooling water tank, and a first heat exchanger is connected between the cooling pipeline and the refrigeration pipeline.
Further, in order to better realize the invention, a flow switch is arranged on a pipeline between the first heat exchanger and the freezing water tank.
Further, in order to better implement the present invention, the refrigeration pipeline includes a compressor, a filter, an electromagnetic valve, and an expansion valve, which are sequentially communicated according to a circulation direction of a cooling medium, and the first heat exchanger is located between the compressor and the expansion valve.
Further, in order to better realize the invention, the compressor is connected with a compressor controller in parallel, a first pressure gauge is arranged on a pipeline connected with the inlet end of the compressor controller, and a second pressure gauge is arranged on a pipeline connected with the outlet end of the compressor controller.
Drawings
FIG. 1 is a schematic structural diagram of the present embodiment;
wherein 1-a cooling water tank, 2-a first water pump, 3-a compressor, 4-a filter, 5-a solenoid valve, 6-an expansion valve, 7-a control flow switch, 8-a first heat exchanger, 9-a second water pump, 10-a first tee joint, 11-a water tank, 12-a heating structure, 13-a third water pump, 14-a second tee joint, 15-a water inlet collecting pipe, 16-a water inlet branch pipe, 17-a water outlet collecting pipe, 18-a water outlet branch pipe, 19-a first pressure detecting meter, 20-a first temperature detecting meter, 23-a second pressure detecting meter, 24-a second temperature detecting meter, 25-a compressor controller, 26-a first pressure meter, 27-a second pressure meter, 28-a second heat exchanger, 29-a third pressure detecting meter, 30-third temperature detecting table.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1, in this embodiment, a water-cooling resistance test system, includes water supply pipeline and water supply cooling pipeline, the water supply pipeline includes water tank 11, third water pump 13 and the pressure manifold 15 of intaking that communicates in proper order according to the rivers direction, and water tank 11 intercommunication has a water pressure manifold 17, water tank 11 in be provided with heating structure 12, water supply pipeline and water supply cooling pipeline between set up at second heat exchanger 28, water supply cooling pipeline intercommunication has cooling water tank 1, the temperature of water in the cooling water tank 1 is less than or equal to 5 ℃.
The cooling water tank 1 is used as a low-temperature water source having a reserve water temperature of 5 c or less and is supplied to the second heat exchanger 28 through the supply water cooling line for heat exchange with the supply water line.
The water-cooled resistor series product to be tested is connected between the water inlet collecting pipe 15 and the water outlet collecting pipe 17 through a joint. The water tank 11 is used for storing a water source with any temperature, and supplies water to the water inlet collecting pipe 15 through a water supply pipe by using power provided by the third water pump 13, so that water is supplied to the water-cooled resistor series product to be tested.
The water in the water tank 11 may be heated to a temperature required for the test using the heating structure 12 in the water tank 11, as needed. When the temperature of supplying water surpasses experimental demand, close heating structure 12, provide the low temperature water to supplying water cooling pipeline, make low temperature water and the water that the circulation got into in the water tank 11 carry out the heat exchange to reduce the temperature of the water that gets into in the water tank 11, with this temperature that reduces the water in the water tank 11 is whole, thereby make the temperature of the water that flows out from the water tank 11 inner loop satisfy experimental requirement.
During the test, hydroenergy in water supply pipe and the water supply cooling pipeline can cyclic utilization to can avoid extravagant water resource.
The water temperature in the cooling water tank 1 is lower than or equal to 5 ℃, when heat exchange occurs in the second heat exchanger 28, the water temperature in the water tank 11 can be reduced to 5 ℃ at least, the requirement on low-temperature water supply during a test can be met, and the water supply temperature range of a test system is expanded.
In some embodiments, a second tee 14 is disposed between the third water pump 13 and the water inlet header 15, and the second tee 14 is communicated with a pipeline between the water tank 11 and the water outlet header 17. Utilize second tee bend 14 can play the effect of damming, when the water pressure in the water outlet collecting pipe 17 is higher than the threshold value of settlement, partial rivers can be through the reposition of redundant personnel of second tee bend 14 and circulate and flow in the water tank 11 to make the experiment can go on under the environment of constant voltage, guarantee the safety of testing process and the reliability of test data.
In some embodiments, the water inlet manifold 15 is connected to a plurality of water inlet branch pipes 16, a proportional two-way valve is disposed on each water inlet branch pipe 16, wherein a second pressure detection meter 23 and a second temperature detection meter 24 are disposed on at least two water inlet branch pipes 16, the water outlet manifold 17 is connected to a plurality of water outlet branch pipes 18, a proportional two-way valve is disposed on each water outlet branch pipe 18, wherein a third pressure detection meter 29 and a third temperature detection meter 30 are disposed on at least two water outlet branch pipes 18, and the number of the water outlet branch pipes 18 is the same as that of the water inlet branch pipes 16.
The proportional two-way valve can be opened and closed by an opening degree, so that the flow and the water pressure of the water inlet branch pipe 16 can be controlled. The water is divided by the water inlet branch pipes 16, a plurality of water-cooled resistor series products to be tested can be tested at the same time, and the test efficiency is improved.
The water pressure before entering the product after the water inlet collecting pipe 15 is shunted can be detected in real time by utilizing the second pressure detection meter 23, and the water temperature before entering the product after the water inlet collecting pipe 15 is shunted can be detected in real time by utilizing the second temperature detection meter 24. According to the detected data, whether the water temperature and the water pressure entering the product meet the requirements can be judged.
The third pressure detecting gauge 29 can detect the water pressure after the product flows out in real time, and the third temperature detecting gauge 30 can detect the water temperature after the product flows out in real time, as comparison data.
In some embodiments, the inlet manifold 15 is connected to a first pressure gauge 19 and a first temperature gauge 20. Utilize first pressure detection table 19 can real-time detection intake the water pressure in the pressure manifold 15, utilize first temperature detection table 20 can real-time detection intake the temperature in the pressure manifold 15, can conveniently find out according to detecting the structure whether temperature, water pressure in the pressure manifold 15 of intaking satisfy the experimental demand to this is convenient for adjust.
In some embodiments, the water supply cooling pipeline includes a second water pump 9, an inlet and an outlet of the second water pump 9 are respectively communicated with the cooling water tank 1, and a second heat exchanger 28 is connected to the pipeline between the outlet of the second water pump 9 and the cooling water tank 1. The second water pump 9 is used to power the flow of water through the water supply cooling circuit, and heat exchange is enabled when the water flows through the second heat exchanger 28.
In some embodiments, a first tee joint 10 is arranged between the second water pump 9 and the second heat exchanger 28, and the first tee joint 10 is communicated with a pipeline between the cooling water tank 1 and the second heat exchanger 28. Utilize first tee bend 10 can play the effect of reposition of redundant personnel, when the rivers pressure that second water pump 9 pumped is greater than the threshold value of setting for, in partial rivers can enter into cooling water tank 1 through the direct backward flow of first tee bend 10, avoid supplying water cooling pipeline internal water pressure too high, be favorable to guaranteeing system's safe operation.
In some embodiments, the water-cooling resistance test system further comprises a cooling pipeline and a refrigeration pipeline, the refrigeration pipeline comprises a first water pump 2 communicated with the cooling water tank 1 through an inlet and an outlet, and a first heat exchanger 8 is connected between the cooling pipeline and the refrigeration pipeline. When the water in the cooling water tank 1 is heated after heat exchange by the second heat exchanger 28, the water temperature in the cooling water tank 1 is raised, and the water heated in the cooling water tank 1 can be guided out by the cooling pipeline and is subjected to heat exchange with the refrigeration pipeline in the first heat exchanger 8, so that the water temperature is reduced, and the water temperature in the cooling water tank 1 is kept constant.
In some embodiments, a flow switch 7 is arranged on a pipeline between the first heat exchanger 8 and the cooling water tank 1. By controlling the opening degree of the flow switch 7, the flow and the flow speed of water flow in the cooling pipeline can be controlled, so that the heat exchange efficiency can be controlled. The opening degree of the flow switch 7 is adjusted in real time according to the data detected by the first pressure detection meter 19 and the first temperature detection meter 20, so as to meet the requirement on the water temperature in the experiment process.
In some embodiments, the refrigeration pipeline includes a compressor 3, a filter 4, a solenoid valve 5 and an expansion valve 6 which are sequentially communicated in a circulation direction of a cooling medium, and the first heat exchanger 8 is located between the compressor 3 and the expansion valve 6. Utilize compressor 3 compression cooling medium, make cooling medium condensation release heat to reduce cooling medium's temperature, cooling medium filters through filter 4, and rethread solenoid valve 5, inflation 6 enter into first heat exchanger 8 in and carry out the heat exchange with the water in the cooling pipeline, thereby make the temperature of water in coolant tank 1 keep in required temperature range all the time.
In some embodiments, the compressor 3 is connected in parallel with a compressor controller 25, a first pressure gauge 26 is disposed on a pipeline connected to an inlet end of the compressor controller 25, and a second pressure gauge 27 is disposed on a pipeline connected to an outlet end of the compressor controller 25. By utilizing the compressor controller 25, the pressure of the pipe network of the refrigeration pipeline can be maintained within a settable limit value range by automatically loading and unloading the compressor 3, and the use safety of the compressor 3 is ensured. Utilize first manometer 26 can real-time detection compressor controller 25 entry end's pressure, utilize second manometer 27 can real-time detection compressor controller 25 exit end's pressure, conveniently control compressor controller 25 according to the data that detect.
In this embodiment, other undescribed contents are the same as those in the above embodiment, and thus are not described again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. The utility model provides a water-cooling resistance test system which characterized in that: including water supply pipeline and water supply cooling line, the water supply pipeline includes water tank (11), third water pump (13) and the pressure manifold of intaking (15) that communicate in proper order according to the rivers direction, and water tank (11) intercommunication has a water pressure manifold (17), water tank (11) in be provided with heating structure (12), water supply pipeline and water supply cooling line between set up at second heat exchanger (28), water supply cooling line intercommunication has cooling water tank (1), the temperature of water in cooling water tank (1) is less than or equal to 5 ℃.
2. The water-cooled resistance test system according to claim 1, wherein: and a second tee joint (14) is arranged between the third water pump (13) and the water inlet collecting pipe (15), and the second tee joint (14) is communicated with a pipeline between the water tank (11) and the water outlet collecting pipe (17).
3. The water-cooled resistance testing system according to claim 1 or 2, wherein: the water inlet collecting pipe (15) is communicated with a plurality of water inlet branch pipes (16), a proportional two-way valve is arranged on each water inlet branch pipe (16), a second pressure detection meter (23) and a second temperature detection meter (24) are arranged on at least two water inlet branch pipes (16), a plurality of water outlet branch pipes (18) are communicated with each water outlet collecting pipe (17), the proportional two-way valves are arranged on the water outlet branch pipes (18), a third pressure detection meter (29) and a third temperature detection meter (30) are arranged on at least two water outlet branch pipes (18), and the number of the water outlet branch pipes (18) is the same as that of the water inlet branch pipes (16).
4. The water-cooled resistance testing system according to claim 3, wherein: the water inlet collecting pipe (15) is connected with a first pressure detection meter (19) and a first temperature detection meter (20).
5. The water-cooled resistance test system according to claim 1, wherein: the water supply cooling pipeline comprises a second water pump (9), an inlet and an outlet of the second water pump (9) are respectively communicated with the cooling water tank (1), and a second heat exchanger (28) is connected to a pipeline between the outlet of the second water pump (9) and the cooling water tank (1).
6. The water-cooled resistance testing system according to claim 5, wherein: a first tee joint (10) is arranged between the second water pump (9) and the second heat exchanger (28), and the first tee joint (10) is communicated with a pipeline between the cooling water tank (1) and the second heat exchanger (28).
7. The water-cooled resistance test system according to claim 1, wherein: still include cooling pipeline and refrigeration pipeline, the refrigeration pipeline include import, export respectively with cooling water tank (1) first water pump (2) of intercommunication, be connected with first heat exchanger (8) between cooling pipeline and the refrigeration pipeline.
8. The water-cooled resistance testing system according to any one of claims 7, wherein: and a flow switch (7) is arranged on a pipeline between the first heat exchanger (8) and the cooling water tank (1).
9. The water-cooled resistance testing system according to claim 7, wherein: the refrigeration pipeline comprises a compressor (3), a filter (4), an electromagnetic valve (5) and an expansion valve (6) which are sequentially communicated according to the circulation direction of a cooling medium, and a first heat exchanger (8) is positioned between the compressor (3) and the expansion valve (6).
10. The water-cooled resistance testing system according to claim 8, wherein: the compressor (3) are connected with a compressor controller (25) in parallel, a first pressure gauge (26) is arranged on a pipeline connected with the inlet end of the compressor controller (25), and a second pressure gauge (27) is arranged on a pipeline connected with the outlet end of the compressor controller (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210144427.3A CN114184810A (en) | 2022-02-17 | 2022-02-17 | Water-cooling resistance test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210144427.3A CN114184810A (en) | 2022-02-17 | 2022-02-17 | Water-cooling resistance test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114184810A true CN114184810A (en) | 2022-03-15 |
Family
ID=80546142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210144427.3A Pending CN114184810A (en) | 2022-02-17 | 2022-02-17 | Water-cooling resistance test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114184810A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202204873U (en) * | 2011-08-22 | 2012-04-25 | 安伦通讯设备(苏州)有限公司 | High power resistor reliability test device |
| CN102607871A (en) * | 2012-02-21 | 2012-07-25 | 合肥通用机械研究院 | Test device of cold water unit suitable for low temperature refrigerating medium |
| CN104791923A (en) * | 2015-04-21 | 2015-07-22 | 国家电网公司 | Precise air-conditioning auxiliary heat dissipation device for machine room |
| CN106023773A (en) * | 2016-07-12 | 2016-10-12 | 天津商业大学 | Central air conditioning comprehensive experimental platform based on steam compression refrigeration system |
| CN107120866A (en) * | 2017-06-21 | 2017-09-01 | 山东星辉航空液压机械有限公司 | One kind plating hard chrome production line heat pump exchange system and exchange method |
| CN108413530A (en) * | 2018-03-06 | 2018-08-17 | 福建工程学院 | A kind of water temperature regulation device and its control method for air-conditioner water system |
| CN108444124A (en) * | 2018-03-05 | 2018-08-24 | 深圳圣思哲电器有限公司 | A kind of refrigerating system and refrigerating method |
| CN214605757U (en) * | 2020-12-29 | 2021-11-05 | 天津南阳科技有限公司 | Cooling device for injection molding machine |
| CN215641564U (en) * | 2021-07-29 | 2022-01-25 | 深圳市禹龙通电子股份有限公司 | Water-cooling aging equipment |
-
2022
- 2022-02-17 CN CN202210144427.3A patent/CN114184810A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202204873U (en) * | 2011-08-22 | 2012-04-25 | 安伦通讯设备(苏州)有限公司 | High power resistor reliability test device |
| CN102607871A (en) * | 2012-02-21 | 2012-07-25 | 合肥通用机械研究院 | Test device of cold water unit suitable for low temperature refrigerating medium |
| CN104791923A (en) * | 2015-04-21 | 2015-07-22 | 国家电网公司 | Precise air-conditioning auxiliary heat dissipation device for machine room |
| CN106023773A (en) * | 2016-07-12 | 2016-10-12 | 天津商业大学 | Central air conditioning comprehensive experimental platform based on steam compression refrigeration system |
| CN107120866A (en) * | 2017-06-21 | 2017-09-01 | 山东星辉航空液压机械有限公司 | One kind plating hard chrome production line heat pump exchange system and exchange method |
| CN108444124A (en) * | 2018-03-05 | 2018-08-24 | 深圳圣思哲电器有限公司 | A kind of refrigerating system and refrigerating method |
| CN108413530A (en) * | 2018-03-06 | 2018-08-17 | 福建工程学院 | A kind of water temperature regulation device and its control method for air-conditioner water system |
| CN214605757U (en) * | 2020-12-29 | 2021-11-05 | 天津南阳科技有限公司 | Cooling device for injection molding machine |
| CN215641564U (en) * | 2021-07-29 | 2022-01-25 | 深圳市禹龙通电子股份有限公司 | Water-cooling aging equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103983464B (en) | Heat exchanger performance test platform | |
| CN201852343U (en) | Precise high-temperature cooling compressor refrigerating system | |
| CN111816894B (en) | Fuel cell heat management device and control method thereof | |
| CN112098854B (en) | Cooling test system suitable for fuel cell test and control method thereof | |
| CN112078806B (en) | Helicopter liquid cooling integrated control system | |
| CN205808715U (en) | A kind of universal cold shock testing device | |
| CN206862631U (en) | A kind of constant-temperaturetest test device of engine water cold type charge air cooler | |
| CN207262801U (en) | A kind of compound cooling water system | |
| WO2021196770A1 (en) | Integrated mast comprehensive cooling system | |
| CN114184810A (en) | Water-cooling resistance test system | |
| CN109974320B (en) | High-temperature deionized water cooling device | |
| CN106604614A (en) | Novel cooling system for power electronic equipment, and operation method thereof | |
| CN111146529A (en) | Constant-temperature storage battery system | |
| CN115266110A (en) | Quick cold and hot impact engine test testing machine | |
| CN108541188A (en) | A kind of heat exchange unit and data center's liquid cooling system | |
| CN211146993U (en) | Heat pump system and air conditioner | |
| CN210690093U (en) | Heat accumulation equipment is with filling heat transfer performance testing arrangement with integrating | |
| CN209570361U (en) | A kind of Performance Test System of gas heater | |
| CN113851674A (en) | Thermal management system for testing fuel cell system | |
| CN110399426B (en) | Small integrated water-cooled heat exchanger system for block chain operation center | |
| CN210068260U (en) | Oil temperature control system and test equipment | |
| CN109282421B (en) | Fault diagnosis simulation device for water chilling unit | |
| CN203584730U (en) | Air compressor heat recovery system for air conditioner heat supply system | |
| CN219454439U (en) | Binary channels refrigeration heating all-in-one | |
| CN110849205A (en) | Water-cooling constant-pressure liquid supplementing water tank system and application method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220315 |