CN108317772B - Air-supplying and enthalpy-increasing system and household appliance - Google Patents
Air-supplying and enthalpy-increasing system and household appliance Download PDFInfo
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- CN108317772B CN108317772B CN201710031645.5A CN201710031645A CN108317772B CN 108317772 B CN108317772 B CN 108317772B CN 201710031645 A CN201710031645 A CN 201710031645A CN 108317772 B CN108317772 B CN 108317772B
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- 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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- 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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/02—Subcoolers
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a gas-supplementing enthalpy-increasing system and a household appliance. The air supplementing and enthalpy increasing system comprises a compressor, a four-way valve, an indoor unit heat exchanger, a first evaporator, a flash subcooler and a second evaporator, wherein the compressor, the four-way valve, the indoor unit heat exchanger, the first evaporator, the flash subcooler and the second evaporator form a refrigerant circulation loop; one end of the superheating pipeline penetrates through the flash subcooler refrigerant liquid to be connected with the four-way valve, and the other end of the superheating pipeline is connected with the second evaporator. The air-supplementing enthalpy-increasing system provided by the invention can comprehensively utilize the advantages of the flash subcooler and the supercooling economizer, improve the efficiency of secondary air supplement, further solve the problem that the air supplement amount can only be adjusted by controlling the intermediate pressure through the electronic throttling device in the prior art, and improve the system efficiency in the refrigeration cycle.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to an air-supplying and enthalpy-increasing system and a household appliance with the same.
Background
At present, in order to improve the low-temperature heating capacity, an air source heat pump mainly adopts a frequency conversion technology, an auxiliary compressor, a two-stage compressor, an air-supplying and enthalpy-increasing system and the like. The core of the vapor-supplementing and enthalpy-increasing is to create a second air suction port in the compression process of the compressor, so that the low-pressure refrigerant gas flowing into the air suction port of the compressor is compressed to intermediate pressure and then mixed with the saturated refrigerant gas entering from the second air suction port under the intermediate pressure, and is continuously compressed to an exhaust state. The air source heat pump mainly has two forms for improving low-temperature heating: one is subcooler heating and the other is flash tank heating. Although the two forms can improve the heating capacity in a low-temperature environment, the air supplement amount can only control the intermediate pressure regulation through the electronic throttling device, and the refrigeration capacity of the air heat source pump is adversely affected.
Therefore, how to provide an air-supply enthalpy-increasing system can comprehensively utilize the advantages of a flash subcooler and a supercooling economizer and improve the efficiency of secondary air supply so as to solve the technical problems that in the prior art, the air supply amount can only be adjusted by controlling intermediate pressure through an electronic throttling device, and the improvement of the system efficiency during refrigeration cycle needs to be solved by technical personnel in the field.
Disclosure of Invention
The invention aims to provide an air-supply enthalpy-increasing system which can comprehensively utilize the advantages of a flash tank and an economizer, improve the efficiency of air-supply circulation, and solve the problems that the air-supply quantity in the prior art can only be adjusted by controlling intermediate pressure through an electronic throttling device and the system efficiency in refrigeration circulation is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the air-supplementing and enthalpy-increasing system comprises a compressor, a four-way valve, an indoor unit heat exchanger, a condenser, a flash subcooler and an evaporator which are sequentially connected end to form a refrigerant circulation loop, wherein the compressor is connected with the flash subcooler through the four-way valve; the flash evaporator is characterized by further comprising a superheating pipeline, wherein one end of the superheating pipeline penetrates through refrigerant liquid in the flash subcooler to be connected with the four-way valve, and the other end of the superheating pipeline is connected with the evaporator.
According to the flash subcooler, the superheating pipeline is arranged, one end of the superheating pipeline penetrates through refrigerant liquid of the flash subcooler to be connected with the four-way valve, the temperature of refrigerant in the superheating pipeline is lower than that of the refrigerant liquid in the flash subcooler, and then heat exchange can be carried out between the refrigerant and the refrigerant in the flash subcooler, so that the temperature of the refrigerant in the flash subcooler can be reduced, gas refrigerant in the flash subcooler can be subcooled into liquid refrigerant, intermediate pressure is actively adjusted, the air supplement amount can be directly adjusted without controlling the intermediate pressure through the electronic throttling device, and the refrigerating capacity of the air heat source pump cannot be affected. The air-supplementing enthalpy-increasing system provided by the invention can comprehensively utilize the advantages of the flash subcooler and the supercooling economizer, improve the efficiency of secondary air supplement, further solve the problem that the air supplement amount can only be adjusted by controlling the intermediate pressure through the electronic throttling device in the prior art, and improve the system efficiency in the refrigeration cycle.
Preferably, a regulating valve is further connected between the first throttling device and the indoor unit heat exchanger, and the regulating valve is connected with the condenser in parallel.
The purpose of setting up the governing valve is to make this system refrigeration, refrigerant circulation route different when heating, and then realizes the refrigeration of different routes, heats the task.
Preferably, the first throttle device and the second throttle device are both expansion valves.
Preferably, the part of the superheating pipeline extending into the flash subcooler is a coil pipe formed by bending a straight pipe or a straight pipe.
Preferably, the overheating pipeline is of an integrated structure.
The superheating pipeline is of an integrated structure, leakage at the joint of each part of the superheating pipeline can be prevented, the overall use of the system is affected, and meanwhile, the coil pipe is formed by bending the straight pipe, so that the superheating pipeline can exchange heat in the refrigerant to the maximum extent, and the refrigerant in the superheating pipeline absorbs heat and is gasified.
Preferably, the opening of the regulating valve is controllable and is manual, pneumatic, hydraulic or electric.
Preferably, a pipeline connecting the flash subcooler with the first throttling device and the second throttling device extends into a refrigerant of the flash subcooler, and a pipeline connecting the flash subcooler with the compressor extends into the flash subcooler and is positioned above the liquid level of the refrigerant of the flash subcooler.
The pipeline that the flash subcooler is connected with the first throttling device and the second throttling device stretches into the refrigerant of the flash subcooler to ensure that the liquid refrigerant and the liquid refrigerant in the flash subcooler are completely mixed, and the pipeline that the flash subcooler is connected with the compressor stretches into the flash subcooler and is positioned above the liquid level of the refrigerant of the flash subcooler to ensure that the gaseous refrigerant entering the compressor cannot be mixed with the liquid refrigerant, so that the energy utilization rate is improved.
Preferably, the regulating valve is a one-way valve, a solenoid valve or an expansion valve.
The regulating valve uses a one-way valve or an electromagnetic valve or an expansion valve, and the refrigerant enters the heat exchanger of the indoor unit from the regulating valve in the refrigeration process of the system, so that the loss of the cold energy in the condenser is prevented; meanwhile, the refrigerant in the indoor unit heat exchanger can be prevented from directly entering the expansion valve without supercooling in the heating process, and the dryness of the refrigerant after passing through the first throttling device is further reduced.
Preferably, the condenser and the evaporator are of a unitary construction.
Still provide a domestic appliance, include above-mentioned tonifying qi increase enthalpy system, domestic appliance is heat pump water heater or air conditioner.
The household appliance provided by the invention can comprehensively utilize the advantages of the flash subcooler and the supercooling economizer, improve the efficiency of secondary air supply, further solve the problem that the air supply amount can only be adjusted by controlling the intermediate pressure through the electronic throttling device in the prior art, and improve the system efficiency in the refrigeration cycle.
The condenser is used as a heating subcooler and a bottom anti-frosting coil.
Drawings
FIG. 1 is a schematic structural diagram of an enthalpy-increasing system for vapor injection provided by the present invention.
In the figure:
1. a compressor; 2. a four-way valve; 3. an indoor unit heat exchanger; 4. a condenser; 5. a flash subcooler; 6. an evaporator; 7. a first throttling device; 8. a second throttling device; 9. a first check valve; 10. a superheating pipeline; 11. adjusting a valve; 12. a second one-way valve; 13. and (4) an air supplement pipeline.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
As shown in fig. 1, the present embodiment provides an air-supplying enthalpy-increasing system, which comprehensively utilizes the advantages of a flash evaporator and an economizer, improves the efficiency of air-supplying circulation, and can actively adjust the intermediate throttling pressure, and the system includes a compressor 1, a four-way valve 2, an indoor unit heat exchanger 3, a condenser 4, a flash evaporator 5, and an evaporator 6, which are sequentially connected end to form a refrigerant circulation loop, wherein the compressor 1 is connected with the flash evaporator 5 through the four-way valve 2, the flash evaporator 5 is connected with the condenser 4 through the four-way valve 7, the flash evaporator 5 is connected with the evaporator 6 through a second throttling device 8, the flash evaporator 5 is connected with an air-supplying port of the compressor 1 through an air-supplying pipeline 13, and the air-supplying pipeline 13 is used for introducing the gas in the flash evaporator into the compressor 1 to be used as the compressor air-supplying circulation; the air supplement pipeline 13 is provided with a first one-way valve 9, and the purpose of the first one-way valve 9 is to prevent the refrigerant in the compressor 1 from flowing into the flash subcooler 2 through the air supplement pipeline to form refrigerant series flow; a second one-way valve 12 is also arranged between the evaporator 6 and the four-way valve 2, and the purpose of the second one-way valve 12 is to prevent part of the refrigerant in the evaporator 6 from directly flowing back to the compressor 1 through the four-way valve 2 in the heating process to influence the heating effect; the system further comprises a superheating pipeline 10, one end of the superheating pipeline 10 penetrates through the flash subcooler 5 to be connected with the four-way valve 2, the other end of the superheating pipeline is connected with the evaporator 6, and a refrigerant gas-liquid mixture in the evaporator 6 flows into the flash subcooler 2 again through the superheating pipeline to exchange heat with a refrigerant in the flash subcooler, so that the temperature of the refrigerant in the superheating pipeline is increased.
The first throttling device 7 and the second throttling device 8 are both expansion valves, and can enable the high-temperature high-pressure liquid refrigerant to be throttled into low-temperature low-pressure wet steam.
A regulating valve 11 is connected between the first throttling device 7 and the indoor unit heat exchanger 3, and the regulating valve 11 is connected with the condenser 4 in parallel; the regulating valve 11 is a one-way valve, so that the gas in the flash subcooler 2 can enter the indoor heat exchanger 3 through the regulating valve 11 to realize the purpose of indoor refrigeration and temperature reduction. The opening of the regulating valve 11 is controllable and is manual, pneumatic, hydraulic or electric.
The part of the overheating pipeline 10 extending into the flash subcooler 5 is a straight pipe or a coil pipe formed by bending the straight pipe. The part of the superheating pipeline extending into the flash subcooler 5 in the embodiment is a coil pipe formed by bending a straight pipe, the structure can prolong the retention time of the refrigerant in the flash subcooler 5, and further the refrigerant in the superheating pipeline 10 can fully exchange heat with the refrigerant in the flash subcooler 5, so that the refrigerant in the superheating pipeline 10 is fully gasified. Meanwhile, in order to prevent the problems of leakage and the like of the overheating pipeline, the overheating pipeline is of an integrated structure.
And the pipeline connecting the flash subcooler 5 with the first throttling device 7 and the second throttling device 8 extends into the refrigerant of the flash subcooler 5, and the pipeline connecting the flash subcooler 5 with the compressor 1 extends into the flash subcooler 5 and is positioned above the refrigerant liquid level of the flash subcooler 5.
The heating process of the system is as follows:
as shown in fig. 1, the internal part of the four-way valve represents a refrigerant passage path during heating, a high-temperature and high-pressure refrigerant passes through a solid line channel of the four-way valve 2 through an outlet of a compressor 1, enters an indoor unit heat exchanger 3 to discharge heat and then becomes low-temperature and high-pressure liquid, then enters a condenser 4 from the indoor heat exchanger 3 to be subcooled, then is throttled by a first throttling device 7 to become medium-temperature and medium-pressure gas-liquid mixed refrigerant, then enters a flash subcooler 5 to be subjected to gas-liquid separation, wherein the separated liquid refrigerant is continuously throttled by a second throttling device 8 to become low-temperature and low-pressure gas-liquid mixture, the low-temperature and low-pressure gas-liquid mixture enters an evaporator 6 to be subjected to gas-liquid heat absorption, then enters the flash subcooler 5 again through a heat pipeline 10 to exchange heat with the refrigerant in the flash subcooler, wherein, the gas refrigerant in the flash subcooler 5 returns to the suction port of the compressor 1 through the gas supplementing pipeline 13.
The condenser 4 and the evaporator 6 are of an integral structure. The condenser 4 is located the bottom of evaporimeter, and the two are through the fin connection to condenser temperature is greater than the evaporimeter temperature, can be with the corresponding transmission of temperature through the fin, and the condenser 4 exists as heating flash subcooler 5 and bottom anti-frosting coil pipe.
The embodiment also provides a household appliance, which comprises the air-supplying and enthalpy-increasing system, wherein the household appliance is a heat pump water heater or an air conditioner.
The household appliance provided by the invention can comprehensively utilize the advantages of the flash subcooler and the supercooling economizer, improve the efficiency of secondary air supply, further solve the problem that the air supply amount can only be adjusted by controlling the intermediate pressure through the electronic throttling device in the prior art, and improve the system efficiency in the refrigeration cycle.
The refrigeration process of the system is as follows:
as shown in fig. 1, a dotted line in the four-way valve 2 indicates a flow path of a refrigerant in the four-way valve 2 during refrigeration, a high-temperature and high-pressure refrigerant comes out from an outlet of the compressor 1 during refrigeration, passes through a refrigeration channel (indicated by the dotted line) of the four-way valve 2 and a second one-way valve 12, enters an evaporator 6 to emit heat and then becomes low-temperature and high-pressure liquid, is throttled by a second throttling device 8 and then becomes low-temperature and medium-pressure gas-liquid mixture, then enters a flash subcooler 5 to perform gas-liquid separation, the separated liquid is continuously throttled by a first throttling device 7 and then becomes low-temperature and low-pressure refrigerant, enters an indoor unit heat exchanger 3 to absorb heat through a regulating valve 11 and then becomes low-temperature and low-pressure gas, then flows through the four-way valve 2.
It is noted that the foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.
Claims (12)
1. An air-supplying and enthalpy-increasing system is characterized by comprising a compressor (1), a four-way valve (2), an indoor unit heat exchanger (3), a condenser (4), a flash evaporator (5) and an evaporator (6) which are sequentially connected end to form a refrigerant circulation loop, the compressor (1) and the flash subcooler (5) are also connected through a four-way valve (2), the flash subcooler (5) is connected with the condenser (4) through a first throttling device (7), the flash subcooler (5) is connected with the evaporator (6) through a second throttling device (8), the flash subcooler (5) is connected with the air supplement port of the compressor (1) through an air supplement pipeline (13), a first one-way valve (9) is arranged on the air supplement pipeline (13), and a second one-way valve (12) is arranged between the evaporator (6) and the four-way valve (2); the flash evaporator is characterized by further comprising a superheating pipeline (10), wherein one end of the superheating pipeline (10) penetrates through refrigerant liquid in the flash subcooler (5) to be connected with the four-way valve (2), and the other end of the superheating pipeline is connected with the evaporator (6).
2. An enthalpy system according to claim 1, characterized in that a regulating valve (11) is further connected between the first throttling device (7) and the indoor heat exchanger (3), the regulating valve (11) being connected in parallel with the condenser (4).
3. An enthalpy system according to claim 2, characterized in that the first throttling device (7) and the second throttling device (8) are expansion valves.
4. An enthalpy-increasing system according to claim 3, wherein the part of the superheating circuit (10) extending into the flash subcooler (5) is a straight pipe or a coil formed by bending the straight pipe.
5. The vapor-supplementing enthalpy-increasing system according to claim 4, wherein the superheating circuit is of a one-piece structure.
6. An enthalpy system according to claim 5, characterized in that the opening of the regulating valve (11) is controllable, either manually, pneumatically, hydraulically or electrically.
7. The vapor-supplementing and enthalpy-increasing system according to claim 6, wherein a pipeline connecting the flash subcooler (5) with the first throttling device (7) and the second throttling device (8) extends into a refrigerant of the flash subcooler (5), and a pipeline connecting the flash subcooler (5) with the compressor (1) extends into the flash subcooler (5) and is located above a refrigerant liquid level of the flash subcooler (5).
8. An enthalpy-increasing system according to any one of claims 2 to 7, characterized in that the regulating valve (11) is a one-way valve.
9. An enthalpy-increasing system according to any of claims 2 to 7, characterized in that the regulating valve (11) is a solenoid valve.
10. An enthalpy system according to any of claims 2 to 7, characterized in that the regulating valve (11) is an expansion valve.
11. An enthalpy-increasing system according to claim 8, wherein the condenser and the evaporator are of a unitary construction.
12. A household appliance comprising an enthalpy-increasing system of air make-up according to any one of claims 1 to 11, the household appliance being a heat pump water heater or an air conditioner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710031645.5A CN108317772B (en) | 2017-01-17 | 2017-01-17 | Air-supplying and enthalpy-increasing system and household appliance |
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| CN201710031645.5A CN108317772B (en) | 2017-01-17 | 2017-01-17 | Air-supplying and enthalpy-increasing system and household appliance |
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| CN108317772A CN108317772A (en) | 2018-07-24 |
| CN108317772B true CN108317772B (en) | 2021-03-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108917061B (en) * | 2018-08-06 | 2024-06-18 | 深圳麦克维尔空调有限公司 | Cold water heat pump unit and air conditioning equipment |
| CN109186146B (en) * | 2018-08-24 | 2024-05-03 | 珠海格力节能环保制冷技术研究中心有限公司 | Flash device and air conditioning system |
| CN109595926A (en) * | 2018-11-22 | 2019-04-09 | 中南大学 | A kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System and drying means |
| CN114216286A (en) * | 2021-12-17 | 2022-03-22 | 中山市爱美泰电器有限公司 | Heat pump host with enthalpy-increasing function system |
| CN118328515A (en) * | 2023-01-12 | 2024-07-12 | 广东美的制冷设备有限公司 | Ice melting method of air conditioner, controller, air conditioner and storage medium |
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