CN113701409A - Heat exchanger secondary refrigerant filling and emptying control device and control method - Google Patents
Heat exchanger secondary refrigerant filling and emptying control device and control method Download PDFInfo
- Publication number
- CN113701409A CN113701409A CN202110905193.5A CN202110905193A CN113701409A CN 113701409 A CN113701409 A CN 113701409A CN 202110905193 A CN202110905193 A CN 202110905193A CN 113701409 A CN113701409 A CN 113701409A
- Authority
- CN
- China
- Prior art keywords
- electric valve
- heat exchanger
- secondary refrigerant
- valve
- coolant
- 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.)
- Granted
Links
- 239000003507 refrigerant Substances 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 4
- 239000002826 coolant Substances 0.000 claims description 27
- 229910052757 nitrogen Inorganic materials 0.000 claims description 13
- 238000005429 filling process Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- F25B45/00—Arrangements for charging or discharging refrigerant
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
-
- 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
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/001—Charging refrigerant to a cycle
-
- 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
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/002—Collecting refrigerant from a cycle
-
- 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
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/003—Control issues for charging or collecting refrigerant to or from a cycle
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention provides a heat exchanger secondary refrigerant filling and emptying control device, which comprises: the inlet pipeline is arranged between the heat exchanger and the secondary refrigerant inlet, the outlet pipeline is arranged between the heat exchanger and the secondary refrigerant outlet, and the inlet pipeline is provided with a fifth electric valve; an eighth electric valve, a low level liquid level meter with the physical position lower than the bottom of the heat exchanger, a fourth electric valve, a secondary refrigerant pump and a first electric valve are sequentially connected to the inlet pipeline and connected to the secondary refrigerant main pipeline, a second electric valve connected in parallel is arranged between the fourth electric valve and the secondary refrigerant main pipeline, and a third electric valve connected in parallel is arranged between the first electric valve and the low level liquid level meter; and a seventh electric valve, a high level liquid level meter with the physical position higher than the top of the heat exchanger and a sixth electric valve are sequentially connected to the outlet pipeline and are connected to the nitrogen gas access point. The control device of the invention charges the secondary refrigerant into the heat exchanger under the using temperature environment and discharges the secondary refrigerant out of the heat exchanger under the non-using temperature environment, thereby reducing the risk.
Description
Technical Field
The invention belongs to the technical field of heat exchangers, and particularly relates to a heat exchanger secondary refrigerant charging and discharging control device and a control method.
Background
In air conditioning systems for large high and low temperature environmental chambers, indirect air cooling based on a coolant is generally used because of the need to transport the cooling energy generated by the cooling device over a long distance. The secondary refrigerant is used as an intermediate substance, is cooled in the evaporator and then is remotely transmitted to a heat exchanger in the air conditioning system through a pipeline, and air flows through the heat exchanger to be cooled. For a laboratory in a high-low temperature environment with a wide temperature range, because the temperature span is large and the temperature range of the secondary refrigerant is narrow, different secondary refrigerants need to be selected in different temperature sections when the temperature of the laboratory is adjusted, the low-temperature secondary refrigerant heat exchanger is responsible for temperature adjustment of the low-temperature section, and the high-temperature secondary refrigerant heat exchanger is responsible for temperature adjustment of the high-temperature section. However, since the low-temperature coolant is vaporized at high temperature and accompanied by corrosivity, the high-temperature coolant is frozen at low temperature, so that the risks of corrosion and leakage of the closed heat exchanger are increased, different coolant heat exchangers are usually placed in different air ducts, and the laboratory adjusts the temperature at different temperature sections through the switching of the air ducts.
Although the mode reduces the risks of leakage and corrosion of the secondary refrigerant heat exchanger, a special air duct needs to be arranged, the investment cost of equipment is increased, the space occupied by the equipment is increased, and the air duct needs to be switched at different temperature sections, so that the temperature adjusting process becomes complicated.
Disclosure of Invention
The invention aims to provide a heat exchanger secondary refrigerant charging and discharging control device and a control method, which are used for solving or reducing at least one problem in the background art.
First, the present invention provides a heat exchanger coolant filling and emptying control device, comprising:
the inlet pipeline is arranged between the heat exchanger and the secondary refrigerant inlet, the outlet pipeline is arranged between the heat exchanger and the secondary refrigerant outlet, and the inlet pipeline is provided with a fifth electric valve; wherein
The inlet pipeline is sequentially connected with an eighth electric valve, a low level liquid level meter with the physical position lower than the bottom of the heat exchanger, a fourth electric valve, a secondary refrigerant pump and a first electric valve to be connected to the secondary refrigerant main pipeline, a second electric valve connected in parallel is arranged between the fourth electric valve and the secondary refrigerant main pipeline, and a third electric valve connected in parallel is arranged between the first electric valve and the low level liquid level meter;
and the outlet pipeline is sequentially connected with a seventh electric valve, a high-level liquid level meter with the physical position higher than the top of the heat exchanger and a sixth electric valve to be connected to the nitrogen gas access point.
In the present invention, the first to fifth electric valves are all globe valves.
In the present invention, a connection point of the eighth electrically operated valve and the inlet pipe is located between the radiator and the fifth electrically operated valve.
In the invention, the outlet pipeline is provided with a one-way valve.
In the present invention, a connection point of the seventh electrically operated valve and the outlet pipe is located between the radiator and the check valve.
In the invention, a one-way valve is arranged between the coolant carrying pump and the first electric valve.
In the present invention, the connection point of the third electric valve and the first electric valve is located between the first electric valve and the check valve.
In addition, the invention also provides a control method of the heat exchanger secondary refrigerant charging and discharging control device based on any one of the above devices, and the control method comprises the following steps:
when secondary refrigerant in the heat exchanger needs to be emptied, the fifth electric valve is closed, so that the secondary refrigerant cannot enter the heat exchanger through the secondary refrigerant inlet and the secondary refrigerant outlet, then the sixth electric valve, the seventh electric valve, the eighth electric valve, the fourth electric valve and the first electric valve are opened, the second electric valve and the third electric valve are closed, the secondary refrigerant pump is operated, nitrogen is filled in a nitrogen access point, the secondary refrigerant in the heat exchanger is discharged to the secondary refrigerant pipeline, when a low level liquid level meter at a physical position lower than the bottom of the heat exchanger generates a liquid-free signal, the secondary refrigerant pump is closed, and the sixth electric valve, the seventh electric valve, the eighth electric valve, the fourth electric valve and the first electric valve finish the emptying of the secondary refrigerant;
when secondary refrigerant needs to be filled into the heat exchanger, the fifth electric valve is closed, so that the secondary refrigerant cannot enter the heat exchanger through the secondary refrigerant inlet and the secondary refrigerant outlet, then the second electric valve, the third electric valve, the eighth electric valve, the seventh electric valve and the sixth electric valve are opened, the first electric valve and the fourth electric valve are closed, the secondary refrigerant pump is operated, the secondary refrigerant is filled into the heat exchanger from the secondary refrigerant main pipe by the secondary refrigerant pump, nitrogen in the original heat exchanger is discharged from a nitrogen access point in the filling process, when a high-level liquid level meter with a physical position higher than the top of the heat exchanger outputs an existing liquid signal, the secondary refrigerant pump is closed, the second electric valve, the third electric valve, the eighth electric valve, the seventh electric valve and the sixth electric valve are closed, and secondary refrigerant filling is completed.
The control device provided by the invention fills the secondary refrigerant into the heat exchanger in the using temperature environment and discharges the secondary refrigerant out of the heat exchanger in the non-using temperature environment, so that the low-temperature secondary refrigerant heat exchanger and the high-temperature secondary refrigerant heat exchanger can be arranged in the same temperature adjusting air duct, and the risks of corrosion of the heat exchanger and leakage of the secondary refrigerant are reduced.
Drawings
In order to more clearly illustrate the technical solution provided by the present invention, the following briefly introduces the accompanying drawings. It is to be expressly understood that the drawings described below are only illustrative of some embodiments of the invention.
FIG. 1 is a schematic view of a heat exchanger coolant charging and discharging control device according to the present invention.
Reference numerals
1-a first electrically operated valve;
2-a second electrically operated valve;
3-third electric valve;
4-fourth electrically operated valve;
5-fifth electric valve;
6-sixth electrically operated valve;
7-seventh electrically operated valve;
8-eighth electrically operated valve;
9-coolant pump;
10-a heat exchanger;
11-a high level gauge;
12-a low level gauge;
13-a main coolant pipeline;
14-nitrogen access point;
15-Secondary refrigerant Outlet
And 16-a coolant inlet.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention.
In order to realize the purposes that the secondary refrigerant is charged into the heat exchanger in the using temperature environment and is discharged out of the heat exchanger in the non-using temperature environment, so that the low-temperature secondary refrigerant heat exchanger and the high-temperature secondary refrigerant heat exchanger can be arranged in the same temperature adjusting air duct, and the risks of corrosion of the heat exchanger and leakage of the secondary refrigerant are reduced, the invention provides the secondary refrigerant charging and emptying control device for the heat exchanger.
The utility model provides a controlling means sets up the secondary refrigerant import and export at the heat exchanger, and controlling means includes a plurality of motorised valves, secondary refrigerant pump and high low level gauge, opens through the switch of control motorised valve and opening of secondary refrigerant pump, combines having liquid and no liquid signal of high low level gauge, realizes the evacuation of secondary refrigerant and fills two kinds of mode.
Specifically, as shown in fig. 1, the apparatus for controlling coolant filling and emptying in a heat exchanger provided by the present invention mainly comprises:
an inlet pipeline arranged between the heat exchanger 10 and the secondary refrigerant inlet 16 and an outlet pipeline arranged between the heat exchanger 10 and the secondary refrigerant outlet 15, wherein the inlet pipeline is provided with a fifth electric valve 5; wherein
An eighth electric valve 8, a low level liquid level meter 12 with the physical position lower than the bottom of the heat exchanger, a fourth electric valve 4, a coolant pump 9 and a first electric valve 1 are sequentially connected to the inlet pipeline and connected to a main coolant pipeline 13, a second electric valve 2 connected in parallel is arranged between the fourth electric valve 4 and the main coolant pipeline 13, and a third electric valve 3 connected in parallel is arranged between the first electric valve 1 and the low level liquid level meter 12;
a seventh electric valve 7, a high level liquid level meter 11 with the physical position higher than the top of the heat exchanger and a sixth electric valve 6 are connected to the outlet pipeline in sequence and connected to a nitrogen gas access point 14.
In this embodiment of the present application, the first to fifth electric valves each employ a globe valve. It will be appreciated that the ball valve of the above embodiments may also be other types of valves, such as gate valves.
Furthermore, in the present application, the connection point of the eighth electric valve 8 and the inlet pipe is located between the radiator 10 and the fifth electric valve 5.
And the outlet pipeline is provided with a one-way valve. Further, the connection point of the seventh electric valve 7 and the outlet pipe is located between the radiator 10 and the check valve.
In the present application, a check valve is provided between the coolant pump 9 and the first motor-operated valve 1. Further, the connection point of the third electric valve 3 and the first electric valve 1 is located between the first electric valve 1 and the check valve.
In addition, the application also provides a control method adopting the heat exchanger secondary refrigerant charging and emptying device, which specifically comprises the following steps:
1) when the secondary refrigerant in the heat exchanger 10 needs to be emptied, the fifth electric valve 5 is closed, so that the secondary refrigerant cannot enter the heat exchanger 10 through the secondary refrigerant inlet 16 and the secondary refrigerant outlet 15, then the sixth electric valve 6, the seventh electric valve 7, the eighth electric valve 8, the fourth electric valve 4 and the first electric valve 1 are opened, the second electric valve 2 and the third electric valve 3 are closed, the secondary refrigerant pump 9 is operated, meanwhile, nitrogen is filled in the nitrogen access point 14, the secondary refrigerant in the heat exchanger is discharged to the secondary refrigerant pipeline 13, and when a liquid-free signal appears in the low liquid level meter 12 with the physical position lower than the bottom of the heat exchanger, the secondary refrigerant pump 9, the sixth electric valve 6, the seventh electric valve 7, the eighth electric valve 8, the fourth electric valve 4 and the first electric valve 1 are closed, so that the secondary refrigerant is emptied;
2) when the secondary refrigerant needs to be filled into the heat exchanger 10, the fifth electric valve 5 is closed, the secondary refrigerant cannot enter the heat exchanger 10 through the secondary refrigerant inlet 16 and the secondary refrigerant outlet 15, then the second electric valve 2, the third electric valve 3, the eighth electric valve 8, the seventh electric valve 7 and the sixth electric valve 6 are opened, the first electric valve 1 and the fourth electric valve 4 are closed, the secondary refrigerant pump 9 is operated, the secondary refrigerant is filled into the heat exchanger 10 from the secondary refrigerant main pipe 13 by the secondary refrigerant pump 9, nitrogen in the original heat exchanger 10 is discharged from the nitrogen access point 14 in the filling process, when the physical position is higher than an existing liquid signal of the high-level liquid level meter 11 at the top of the heat exchanger, the secondary refrigerant pump 9 is closed, the second electric valve 2, the third electric valve 3, the eighth electric valve 8, the seventh electric valve 7 and the sixth electric valve 6 are closed, and secondary refrigerant filling is completed.
The device and the method for controlling the filling and emptying of the secondary refrigerant of the heat exchanger can ensure that the high-temperature secondary refrigerant heat exchanger and the low-temperature secondary refrigerant heat exchanger can be arranged in the same temperature adjusting air duct, and meanwhile, the secondary refrigerant can be filled into the heat exchanger in the using temperature environment, and the secondary refrigerant is discharged out of the heat exchanger in the non-using temperature environment, so that the risks of corrosion of the heat exchanger and leakage of the secondary refrigerant are reduced; in addition, additional air channels, fans, secondary refrigerant pipelines and the like are not required to be added, the investment cost of laboratory equipment in high and low temperature environments is reduced, and the equipment arrangement space is saved; finally, when the temperature of a laboratory is adjusted in a high-temperature and low-temperature environment, only the used heat exchangers need to be switched at different temperature sections, air duct switching is not needed, and the temperature control program is simplified.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. A heat exchanger coolant fill and empty control apparatus, the control apparatus comprising:
an inlet pipeline arranged between the heat exchanger (10) and the secondary refrigerant inlet (16) and an outlet pipeline arranged between the heat exchanger (10) and the secondary refrigerant outlet (15), wherein a fifth electric valve (5) is arranged on the inlet pipeline; wherein
An eighth electric valve (8), a low level liquid level meter (12) with a physical position lower than the bottom of the heat exchanger, a fourth electric valve (4), a coolant carrying pump (9) and a first electric valve (1) are sequentially connected to the inlet pipeline and connected to the coolant main pipeline (13), a second electric valve (2) connected in parallel is arranged between the fourth electric valve (4) and the coolant main pipeline (13), and a third electric valve (3) connected in parallel is arranged between the first electric valve (1) and the low level liquid level meter (12);
and a seventh electric valve (7), a high level liquid level meter (11) with the physical position higher than the top of the heat exchanger and a sixth electric valve (6) are sequentially connected to the outlet pipeline and are connected to a nitrogen gas access point (14).
2. The heat exchanger coolant fill and drain control apparatus of claim 1 wherein the first electrically operated valve to the fifth electrically operated valve are globe valves.
3. Heat exchanger coolant filling and emptying control device according to claim 1, characterized in that the connection point of the eighth electric valve (8) to the inlet line is located between the radiator (10) and the fifth electric valve (5).
4. The heat exchanger coolant fill and empty control device of claim 1, wherein a check valve is provided on the outlet line.
5. Heat exchanger coolant filling and emptying control device according to claim 4, characterized in that the connection point of the seventh electric valve (7) to the outlet line is located between the radiator (10) and a one-way valve.
6. Heat exchanger coolant fill and drain control device according to claim 1, characterized in that a check valve is provided between the coolant pump (9) and the first electric valve (1).
7. The heat exchanger coolant fill and drain control apparatus as claimed in claim 6, characterized in that the connection point of the third electric valve (3) and the first electric valve (1) is located between the first electric valve (1) and the check valve.
8. A method of controlling a heat exchanger coolant charge and discharge control apparatus as recited in any one of claims 1 to 7, characterized in that the method comprises:
when the secondary refrigerant in the heat exchanger (10) needs to be emptied, the fifth electric valve (5) is closed, the secondary refrigerant cannot enter the heat exchanger (10) through the secondary refrigerant inlet (16) and the secondary refrigerant outlet (15), then the sixth electric valve (6), the seventh electric valve (7), the eighth electric valve (8), the fourth electric valve (4) and the first electric valve (1) are opened, the second electric valve (2) and the third electric valve (3) are closed, the secondary refrigerant pump (9) is operated, meanwhile, nitrogen is filled in the nitrogen access point (14), the secondary refrigerant in the heat exchanger is discharged to the secondary refrigerant pipeline (13), when a liquid-free signal appears in the low level gauge (12) with the physical position lower than the bottom of the heat exchanger, the secondary refrigerant pump (9) is closed, the sixth electric valve (6), the seventh electric valve (7), the eighth electric valve (8), the fourth electric valve (4) and the first electric valve (1), finishing the emptying of the secondary refrigerant;
when secondary refrigerant needs to be filled into the heat exchanger (10), the fifth electric valve (5) is closed, the secondary refrigerant cannot enter the heat exchanger (10) through the secondary refrigerant inlet (16) and the secondary refrigerant outlet (15), then the second electric valve (2), the third electric valve (3), the eighth electric valve (8), the seventh electric valve (7) and the sixth electric valve (6) are opened, the first electric valve (1) and the fourth electric valve (4) are closed, the secondary refrigerant pump (9) is operated, the secondary refrigerant is filled into the heat exchanger (10) through the secondary refrigerant main pipe (13) by the secondary refrigerant pump (9), nitrogen in the original heat exchanger (10) is discharged from the nitrogen access point (14) in the filling process, when liquid signals exist by the high-level liquid level gauge (11) with the physical position higher than the top of the heat exchanger, the secondary refrigerant pump (9) is closed, and the second electric valve (2), the third electric valve (3) and the sixth electric valve (6) are closed, And the eighth electric valve (8), the seventh electric valve (7) and the sixth electric valve (6) finish the secondary refrigerant charging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110905193.5A CN113701409B (en) | 2021-08-08 | 2021-08-08 | Heat exchanger secondary refrigerant filling and emptying control device and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110905193.5A CN113701409B (en) | 2021-08-08 | 2021-08-08 | Heat exchanger secondary refrigerant filling and emptying control device and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113701409A true CN113701409A (en) | 2021-11-26 |
| CN113701409B CN113701409B (en) | 2023-03-14 |
Family
ID=78651785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110905193.5A Active CN113701409B (en) | 2021-08-08 | 2021-08-08 | Heat exchanger secondary refrigerant filling and emptying control device and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113701409B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4363222A (en) * | 1979-01-19 | 1982-12-14 | Robinair Manufacturing Corporation | Environmental protection refrigerant disposal and charging system |
| US5097667A (en) * | 1990-09-07 | 1992-03-24 | Asger Gramkow | Apparatus and a method for emptying and recharging a refrigeration system |
| US20100005815A1 (en) * | 2006-07-04 | 2010-01-14 | Sumitomo Heavy Industries, Ltd. | Liquid discharge method and liquid discharger in temperature controlller |
| WO2013114383A1 (en) * | 2011-12-14 | 2013-08-08 | Robert Bosch Engineering And Business Solutions Limited | A method of operating a refrigerant recovery and recharge device |
| CN208356750U (en) * | 2018-03-27 | 2019-01-11 | 华洋通信科技股份有限公司 | Cyclic ammonia water UTILIZATION OF VESIDUAL HEAT IN refrigeration unit automatic nitrogen-charging pressurizer |
| CN110006118A (en) * | 2019-03-29 | 2019-07-12 | 中国飞机强度研究所 | A kind of large-scale synthesis climatizer air treatment system |
-
2021
- 2021-08-08 CN CN202110905193.5A patent/CN113701409B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4363222A (en) * | 1979-01-19 | 1982-12-14 | Robinair Manufacturing Corporation | Environmental protection refrigerant disposal and charging system |
| US5097667A (en) * | 1990-09-07 | 1992-03-24 | Asger Gramkow | Apparatus and a method for emptying and recharging a refrigeration system |
| US20100005815A1 (en) * | 2006-07-04 | 2010-01-14 | Sumitomo Heavy Industries, Ltd. | Liquid discharge method and liquid discharger in temperature controlller |
| WO2013114383A1 (en) * | 2011-12-14 | 2013-08-08 | Robert Bosch Engineering And Business Solutions Limited | A method of operating a refrigerant recovery and recharge device |
| CN208356750U (en) * | 2018-03-27 | 2019-01-11 | 华洋通信科技股份有限公司 | Cyclic ammonia water UTILIZATION OF VESIDUAL HEAT IN refrigeration unit automatic nitrogen-charging pressurizer |
| CN110006118A (en) * | 2019-03-29 | 2019-07-12 | 中国飞机强度研究所 | A kind of large-scale synthesis climatizer air treatment system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113701409B (en) | 2023-03-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9784481B2 (en) | Heat-recovery-type refrigerating apparatus | |
| CN111929087B (en) | A multifunctional test bench for power battery thermal management system performance | |
| KR102554368B1 (en) | Hydrogen Pre-cooling System and Method of Hydrogen Station | |
| CN103080668B (en) | Air-conditioning device | |
| CN104613668A (en) | Combined air-conditioning system as well as control method thereof | |
| CN104848436A (en) | Electronic component box cooling system, refrigerant flow control method and air conditioner | |
| CN103115514A (en) | Condensation-proof refrigerant circulating heat tube system and controlling method thereof | |
| CN103129349A (en) | Electric vehicle air conditioner system | |
| CN103925655A (en) | Air-conditioner outdoor unit and air conditioner | |
| JP4354881B2 (en) | Refrigerant filling device | |
| CN113701409B (en) | Heat exchanger secondary refrigerant filling and emptying control device and control method | |
| CN103808524B (en) | A kind of water-water type/water-ethylene glycol type water source heat pump units performance testing device | |
| CN103872372B (en) | Movable flow battery unit | |
| KR101647285B1 (en) | Thermal storage air conditioning system that can perform sequential or simultaneous frost accumulation and emissions or heat storage and dissipation by using a single heat exchanger and its control method | |
| CN210792875U (en) | Thermal management system of electric automobile | |
| CN208027834U (en) | Braking resistor cooling system and vehicle | |
| CN219123324U (en) | Water side multi-connected unit | |
| CN217288441U (en) | High-precision high-low temperature high-low pressure environment test box | |
| CN114160215B (en) | High-precision high-low temperature high-low pressure environment test box and test method thereof | |
| CN216749972U (en) | Low-temperature starting testing device for vehicle-mounted fuel cell | |
| CN206585457U (en) | Liquid air-cooled variable-frequency device | |
| CN214139827U (en) | Tank container | |
| CN116646652A (en) | Direct cooling and direct heating heat management system and method for carbon dioxide for energy storage battery | |
| KR102554369B1 (en) | Hydrogen Pre-cooling Method of Hydrogen Station | |
| CN204421433U (en) | Wine storage device and refrigeration plant 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |