CN102840716B - Heat pump system and control method thereof - Google Patents

Heat pump system and control method thereof Download PDF

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Publication number
CN102840716B
CN102840716B CN201110173901.7A CN201110173901A CN102840716B CN 102840716 B CN102840716 B CN 102840716B CN 201110173901 A CN201110173901 A CN 201110173901A CN 102840716 B CN102840716 B CN 102840716B
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connector
electric expansion
expansion valve
valve
heat pump
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CN102840716A (en
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黄玉优
肖洪海
于静
张建东
尹茜
曹巍
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a heat pump system and a control method thereof. The heat pump system comprises a compressor (1), a first four-way valve (2), a second four-way valve (3), a third four-way valve (4), a first heat exchanger (5), a second heat exchanger (6), a third heat exchanger (7), a fourth heat exchanger (8), a first throttling assembly, a second throttling assembly, a third throttling assembly and a fourth throttling assembly. According to the heat pump system and the control method of the heat pump system provided by the invention, the heating and refrigerating effects of the heat pump system are better.

Description

Heat pump and control method thereof
Technical field
The present invention relates to art of heat pumps, in particular to a kind of heat pump and control method thereof.
Background technology
Swimming pool air-conditioning products is a lot of in the market, and its major function comprises the air constant temperature of swimming pool indoor, dehumidifying and the heating of pond water termostat.More advanced swimming pool heat pump product is that Ji Chishui heating, indoor air dehumidification and room air freeze, heat in one.But there is following shortcoming in this heat pump: first, when pool water within heats for the first time, unit realizes Chi Shui heating by the air heat energy in extraction chamber, this mode of heating reduces indoor air temperature by while the heating of unit pool water within, indoor temperature declines gradually, can affect the heating effect of Chi Shui; Some swimming pools adopt alternate manner to heat in first Chi Shui heating, such as high-temperature steam heating, auxiliary electrical heater etc., and the power consumption of these mode of heatings is large, can not realize energy-conservation object; Secondly, when summer, pond water temperature was higher, unit cannot realize directly lowering the temperature to Chi Shui, can only by realizing the indirect cooling of Chi Shui to air cooling-down refrigeration, adopt and easily make air themperature lower in this way, when swimmer from Chi Shuizhong out time, easily catch a cold and even catch a cold; 3rd, when winter heats to Chi Shui, sometimes need auxiliary electrical heater equipment to provide heat to maintain indoor temperature; Finally, unit internal unit utilization rate is low and systemic-function causes unit operation strategies narrow and small less.
Heat for heat pump in correlation technique or the problem of poor refrigerating efficiency, not yet propose effective solution at present.
Summary of the invention
Main purpose of the present invention is to provide a kind of heat pump and control method thereof, heats or the problem of poor refrigerating efficiency to solve heat pump.
To achieve these goals, according to an aspect of the present invention, a kind of heat pump is provided.
Heat pump according to the present invention comprises: compressor; First cross valve, have the first connector, the second connector, the 3rd connector, the 4th connector, wherein, the first connector is connected with the first end of compressor, and the second connector is connected with the second end of compressor; Second cross valve, has the 5th connector, the 6th connector, the 7th connector, the 8th connector, and wherein, the 5th connector is connected with the 3rd connector, and the 6th connector is connected with the second end of compressor; 3rd cross valve, has the 9th connector, the tenth connector, the 11 connector, the 12 connector, and wherein, the 9th connector is connected with the 4th connector, and the tenth connector is connected with the second end of compressor; First Heat Exchanger, first end is connected with the 7th connector; Second heat exchanger, carry out heat exchange with outdoor air or cooling water, first end is connected with the 11 connector; 3rd heat exchanger, first end is connected with the 8th connector; 4th heat exchanger, first end is connected with the 12 connector; First throttle assembly, first end is connected with the second end of First Heat Exchanger; Second orifice union, first end is connected with the second end of the second heat exchanger; 3rd orifice union, first end is connected with the second end of the 3rd heat exchanger; 4th orifice union, first end is connected with the second end of the 4th heat exchanger; And first throttle assembly, the second orifice union, the 3rd orifice union, the 4th orifice union the conducting between two of the second end.
Further, first throttle assembly to close the first electric expansion valve of cut-off and the parallel-connection structure of the first check valve; Second orifice union to close the second electric expansion valve of cut-off and the parallel-connection structure of the second check valve; 3rd orifice union to close the 3rd electric expansion valve of cut-off and the parallel-connection structure of the 3rd check valve; 4th orifice union is the parallel-connection structure of the 4th electric expansion valve and the 4th check valve.
Further, also comprise the multitube high pressure fluid reservoir two-way circulated according to heat pump of the present invention, be connected with the second end of first throttle assembly, the second orifice union, the 3rd orifice union, the 4th orifice union.
Further, heat pump according to the present invention also comprises: gas-liquid separator, and one end is connected with compressor second end, and the other end is connected with the second connector, the 6th connector and the tenth connector.
To achieve these goals, according to another aspect of the present invention, a kind of heat pump control method is provided.
This heat pump control method, for controlling any one heat pump provided by the invention, comprising: the conversion being controlled the stream of heat pump by the open and-shut mode controlling any two cross valves in the first cross valve, the second cross valve, the 3rd cross valve; And being in closed condition by two electric expansion valves any in control first electric expansion valve, the second electric expansion valve, the 3rd electric expansion valve and the 4th electric expansion valve, another electric expansion valve is in and automatically regulates aperture state to control the opening and closing degree of the stream of heat pump arbitrarily.
To achieve these goals, according to another aspect of the present invention, a kind of heat pump control method is provided.
This heat pump control method, for controlling any one heat pump provided by the invention, comprising: the conversion being controlled the stream of heat pump by the open and-shut mode controlling any two cross valves in the first cross valve, the second cross valve, the 3rd cross valve; And being in closed condition by any one electric expansion valve in control first electric expansion valve, the second electric expansion valve, the 3rd electric expansion valve and the 4th electric expansion valve, another two electric expansion valves are in and automatically regulate aperture state to control the opening and closing degree of the stream of heat pump arbitrarily.
To achieve these goals, according to another aspect of the present invention, a kind of heat pump control method is provided.
This heat pump control method, for controlling any one heat pump provided by the invention, comprising: the conversion being controlled heat pump stream by the open and-shut mode controlling any two cross valves in the first cross valve, the second cross valve, the 3rd cross valve; And be in the automatic opening and closing degree regulating aperture state to control heat pump stream by controlling any three electric expansion valves in the first electric expansion valve, the second electric expansion valve, the 3rd electric expansion valve and the 4th electric expansion valve.
Further, in any one heat pump control method provided by the invention, in the first cross valve, the second cross valve and the 3rd cross valve, do not kept closed condition by the cross valve controlling open and-shut mode.
Further, in any one heat pump control method provided by the invention, be not in the first electric expansion valve, the second electric expansion valve, the 3rd electric expansion valve and the 4th electric expansion valve and automatically regulate aperture state and the electric expansion valve maintenance full-gear not being in closed condition.
By the present invention, adopt the heat pump comprised with lower part: compressor; First cross valve, have the first connector, the second connector, the 3rd connector, the 4th connector, wherein, the first connector is connected with the first end of compressor, and the second connector is connected with the second end of compressor; Second cross valve, has the 5th connector, the 6th connector, the 7th connector, the 8th connector, and wherein, the 5th connector is connected with the 3rd connector, and the 6th connector is connected with the second end of compressor; 3rd cross valve, has the 9th connector, the tenth connector, the 11 connector, the 12 connector, and wherein, the 9th connector is connected with the 4th connector, and the tenth connector is connected with the second end of compressor; First Heat Exchanger, first end is connected with the 7th connector; Second heat exchanger, first end is connected with the 11 connector; 3rd heat exchanger, first end is connected with the 8th connector; 4th heat exchanger, first end is connected with the 12 connector; First throttle assembly, first end is connected with the second end of First Heat Exchanger; Second orifice union, first end is connected with the second end of the second heat exchanger; 3rd orifice union, first end is connected with the second end of the 3rd heat exchanger; 4th orifice union, first end is connected with the second end of the 4th heat exchanger; And first throttle assembly, the second orifice union, the 3rd orifice union, the 4th orifice union the conducting between two of the second end, solve heat pump and heat or the problem of poor refrigerating efficiency, so heat pump is heated or refrigeration better.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structure chart of the heat pump according to the embodiment of the present invention.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Fig. 1 is the structure chart of the heat pump according to the embodiment of the present invention.
As shown in Figure 1, this heat pump comprises: compressor 1; First cross valve 2, has the first connector D1, the second connector S1, the 3rd connector C1, the 4th connector E1, and wherein, the first connector D1 is connected with the first end of compressor 1, and the second connector S1 is connected with the second end of compressor 1; Second cross valve 3, has the 5th connector D2, the 6th connector S2, the 7th connector C2, the 8th connector E2, and wherein, the 5th connector D2 is connected with the 3rd connector C1, and the 6th connector S2 is connected with the second end of compressor 1; 3rd cross valve 4, has the 9th connector D3, the tenth connector S3, the 11 connector C3, the 12 connector E3, and wherein, the 9th connector D3 is connected with the 4th connector E1, and the tenth connector S3 is connected with the second end of compressor 1; First Heat Exchanger 5, first end is connected with the 7th connector C2; Second heat exchanger 6, first end is connected with the 11 connector C3; 3rd heat exchanger 7, first end is connected with the 8th connector E2; 4th heat exchanger 8, first end is connected with the 12 connector E3; First throttle assembly, first end is connected with the second end of First Heat Exchanger 5; Second orifice union, first end is connected with the second end of the second heat exchanger 6; 3rd orifice union, first end is connected with the second end of the 3rd heat exchanger 7; 4th orifice union, first end is connected with the second end of the 4th heat exchanger 8; And the second end of first throttle assembly, the second orifice union, the 3rd orifice union and the 4th orifice union connects and conducting between two.
In this embodiment, system adopts three cross valves to connect four heat exchangers, wherein First Heat Exchanger 5 can be heated condenser, second heat exchanger 6 can be outdoor condenser, 3rd heat exchanger 7 can be indoor evaporator, 4th heat exchanger 8 can be air reheater, meanwhile, adopts four cover orifice unions as throttling or the equipment regulating refrigerant flow direction.This heat pump can adopt different operational modes according to actual needs, thus make the refrigeration of heat pump or heating effect better, adopt less parts to realize multi-mode operation simultaneously, optimize machine set system structure, make unit compacter, efficient, make it produce a desired effect and can several functions be increased, the utilization rate of raising equipment, saves cost of manufacture, and does not need other auxiliary equipment when heating or freeze, save the energy, low-carbon environment-friendly.Control capillary-compensated relative to magnetic valve break-make, the present invention controls more simply, the stability of a system is higher, unit self-regulation accurate, more can adapt to different operating conditions.Adopt the heat pump of this embodiment, the feature such as make source pump have practicality, energy saving, the feature of environmental protection and to be widely used.
Preferably, first throttle assembly to close the first electric expansion valve 9 of cut-off and the parallel-connection structure of the first check valve 10; Second orifice union to close the second electric expansion valve 11 of cut-off and the parallel-connection structure of the second check valve 12; 3rd orifice union to close the 3rd electric expansion valve 13 of cut-off and the parallel-connection structure of the 3rd check valve 14; 4th orifice union to close the 4th electric expansion valve 15 of cut-off and the parallel-connection structure of the 4th check valve 16.
Adopt the orifice union of parallel-connection structure as heat pump of electric expansion valve and check valve, by the different conditions of electric expansion valve and being limited by direction of check valve, realize the object of throttling or adjustment refrigerant flow direction.The large-scale flow-adjusting characteristics of electric expansion valve accurately can control the flow of cold-producing medium, thus make the refrigeration of heat pump or heating effect better.
Preferably, also comprise the multitube high pressure fluid reservoir 17 two-way circulated according to the heat pump of the embodiment of the present invention, be connected with the second end of first throttle assembly, the second orifice union, the 3rd orifice union, the 4th orifice union.
Alternatively, this high pressure fluid reservoir is two-way multitube high pressure fluid reservoir, the circulating mass of refrigerant difference that can exist between the various operational mode of adjusting heat pump system, when circulating mass of refrigerant is larger, high pressure fluid reservoir provides cold-producing medium, when circulating mass of refrigerant is less, unnecessary cold-producing medium is stored in high pressure fluid reservoir, thus make the refrigeration of heat pump or heating effect better.
Preferably, the heat pump according to the embodiment of the present invention also comprises gas-liquid separator 18, and one end is connected with compressor 1 second end, and the other end is connected with the second connector S1, described 6th connector S2 and described tenth connector S3.
By arranging gas-liquid separator, can prevent the compressor inlet inspiration liquid refrigerants of heat pump from producing liquid hazards compressor, simultaneously, the good separating effect of gas-liquid separator, adapt to segregational load wide ranges, operating efficiency is stablized, thus make the refrigeration of heat pump or heating effect better.
For realizing the control of heat pump of the present invention, the invention provides the control method of multiple heat pump, by different control methods, realizing the plurality of operating modes of heat pump.
Control method 1: the conversion being controlled the stream of heat pump by the open and-shut mode controlling any two cross valves in the first cross valve 2, second cross valve 3, the 3rd cross valve 4; And being in closed condition by two electric expansion valves any in control first electric expansion valve 9, second electric expansion valve 11, the 3rd electric expansion valve 13 and the 4th electric expansion valve 15, another electric expansion valve is in and automatically regulates aperture state to control the opening and closing degree of the stream of heat pump arbitrarily.
Adopt this control method, make to access a condenser and an evaporimeter in refrigerant circulation loop, by the combinations of states of different cross valve and different electric expansion valve, realize multiple refrigeration or the heat-production functions of heat pump.
Example 1: the first cross valve 2, second cross valve 3 is closed condition; 3rd electric expansion valve 13, the 4th electric expansion valve 15 are closed condition; Second electric expansion valve 11 is that when automatically regulating aperture state, heat pump runs on water heating pattern, and wherein, the cyclic process of cold-producing medium is:
Condensation heat release in the first connector D1 of high temperature and high pressure gas → the first cross valve 2 and the 5th connector D2 of the 3rd connector C1 → the second cross valve 3 and the 7th connector C2 → heated condenser 5 discharged by compressor 1, discharge highly pressurised liquid → the first check valve 10 → two-way multitube high pressure fluid reservoir 17 → become Low temperature low pressure liquid → absorb heat at outdoor condenser 6 in the second electric expansion valve 11 throttling, discharge separation gas in the 11 connector C3 of low-pressure gas → the 3rd cross valve 4 and the 4th connector E1 of the 9th connector D3 → the first cross valve 2 and the second connector S1 → gas-liquid separator 18, liquid refrigerants → gaseous coolant enters compressor 1.
When heat pump is used for the Chi Shui heating of swimming pool, adopt this water heating pattern directly to heat Chi Shui, do not affect the temperature of room air, heating effect is good, and does not need other ancillary heating equipment such as auxiliary steam, auxiliary electrical heater, saves the energy.
Example 2: when heat pump is used for chilled water, the first cross valve 2 is open mode, and the 3rd cross valve 4 is closed condition; 3rd electric expansion valve 13, the 4th electric expansion valve 15 are closed condition; First electric expansion valve 9 is automatically regulate aperture state.Heat pump runs on chilled water pattern, and the cyclic process of cold-producing medium is:
Chilled water: compressor 1 discharges the first connector D1 of high temperature and high pressure gas → the first cross valve 2 and the 9th connector D3 of the 4th connector E1 → the 3rd cross valve 4 and the 11 connector C3 → condensation heat release in outdoor condenser 6, discharge highly pressurised liquid → the second check valve 12 → two-way multitube high pressure fluid reservoir 17 → become Low temperature low pressure liquid → heat absorption in heated condenser 5 in the first electric expansion valve 9 throttling, discharge 18 separation gas in the 7th connector C2 of low-pressure gas → the second cross valve 3 and the 3rd connector C1 of the 5th connector D2 → the first cross valve 2 and the second connector S1 → gas-liquid separator, liquid refrigerants → gaseous coolant enters compressor 1.
When summer, pond water temperature was higher, heat pump can be used in the pond water for cooling of swimming pool, this chilled water pattern is adopted directly to freeze to Chi Shui, do not affect the temperature of room air, good refrigeration effect, swimmer is cool and comfortable in water, and from Chi Shuizhong, out indoor temperature is suitable later, can not catch a cold or catch a cold.
Example 3: the first cross valve 2 is open mode, and the 3rd cross valve 4 is closed condition; First electric expansion valve 9, the 4th electric expansion valve 15 are closed condition; 3rd electric expansion valve 13 is automatically regulate aperture state.Heat pump runs on indoor refrigeration mode, and the cyclic process of cold-producing medium is:
Compressor 1 discharges the first connector D1 of high temperature and high pressure gas → the first cross valve 2 and the 9th connector D3 of the 4th connector E1 → the 3rd cross valve 4 and the 11 connector C3 → condensation heat release in outdoor condenser 6, discharge highly pressurised liquid → the second check valve 12 → two-way multitube high pressure fluid reservoir 17 → become Low temperature low pressure liquid → heat absorption in indoor evaporator 7 in the 3rd electric expansion valve 13 throttling, discharge separation gas in the 8th connector E2 of low-pressure gas → the second cross valve 3 and the 6th connector S2 → gas-liquid separator 18, liquid refrigerants → gaseous coolant enters compressor 1.
Example 4: the first cross valve 2 is open mode, and the 3rd cross valve 4 is closed condition; First electric expansion valve 9, the 3rd electric expansion valve 13 are closed condition; 4th electric expansion valve 15 is auto state.Heat pump runs on indoor refrigeration mode, and the cyclic process of cold-producing medium is:
Compressor 1 discharges the first connector D1 of high temperature and high pressure gas → the first cross valve 2 and the 9th connector D3 of the 4th connector E1 → the 3rd cross valve 4 and the 11 connector C3 → condensation heat release in outdoor condenser 6, discharge highly pressurised liquid → the second check valve 12 → two-way four-pipe system high pressure fluid reservoir 17 → become Low temperature low pressure liquid → absorb heat in air reheater 8 in the 4th electric expansion valve 15 throttling, discharge separation gas in the 12 connector E3 of low-pressure gas → the 3rd cross valve 4 and the tenth connector S3 → gas-liquid separator 18, liquid refrigerants → gaseous coolant enters compressor 1.
The heat pump of example 3 and example 4 all runs on indoor refrigeration mode, freeze similar with the room conditioning of routine, but there is the circulation canal of two kinds of cold-producing mediums, because indoor evaporator 7 is different from the position that air reheater 8 is installed, thus adopt different circulation canals can realize the difference of adjacent or close different places or freeze simultaneously, make refrigeration better, and utilize identical outdoor condenser 6, save cost, improve utilization rate of equipment and installations.
Example 5: the first cross valve 2 is closed condition, and the second cross valve 3 is open mode; First electric expansion valve 9, the 4th electric expansion valve 15 are closed condition; Second electric expansion valve 11 is auto state.Heat pump runs on indoor heating pattern, and the cyclic process of cold-producing medium is:
Compressor 1 discharges the first connector D1 of high temperature and high pressure gas → the first cross valve 2 and the 5th connector D2 of the 3rd connector C1 → the second cross valve 3 and the 8th connector E2 → condensation heat release in indoor evaporator 7, discharge highly pressurised liquid → the 3rd check valve 14 → two-way multitube high pressure fluid reservoir 17 → become Low temperature low pressure liquid → heat absorption in outdoor condenser 6 in the second electric expansion valve 11 throttling, discharge separation gas in the 11 connector C3 of low-pressure gas → the 3rd cross valve 4 and the 4th connector E1 of the 9th connector D3 → the first cross valve 2 and the second connector S1 → gas-liquid separator 18, liquid refrigerants → gaseous coolant enters compressor 1.
Example 6: the first cross valve 2 and the 3rd cross valve 4 are open mode; First electric expansion valve 9 and the 3rd electric expansion valve 13 are closed condition; Second electric expansion valve 11 is automatically regulate aperture state.Heat pump runs on indoor heating pattern, and the cyclic process of cold-producing medium is:
Compressor 1 discharges the first connector D1 of high temperature and high pressure gas → the first cross valve 2 and the 9th connector D3 of the 4th connector E1 → the 3rd cross valve 4 and the 12 connector E3 → condensation heat release in air reheater 8, discharge highly pressurised liquid → the 4th check valve 16 → two-way multitube high pressure fluid reservoir 17 → become Low temperature low pressure liquid → heat absorption in outdoor condenser 6 in the 3rd electric expansion valve 11 throttling, discharge separation gas in the 11 connector C3 of low-pressure gas → the 3rd cross valve 4 and the tenth connector S3 → gas-liquid separator 18, liquid refrigerants → gaseous coolant enters compressor 1.
The heat pump of example 5 and example 6 all runs on indoor heating pattern, heat similar with the room conditioning of routine, but there is the circulation canal of two kinds of cold-producing mediums, the position of installing due to indoor evaporator 7 and air reheater 8 can be different, thus adopt different circulation canals can realize heating respectively of adjacent or close different places, make heating effect better, and utilize identical outdoor condenser 6, save cost, improve utilization rate of equipment and installations.
Example 7: the first cross valve 2, second cross valve 3 is closed condition; Second electric expansion valve 11, the 4th electric expansion valve 15 are closed condition; 3rd electric expansion valve 13 is auto state.Heat pump runs on water heating and indoor refrigeration mode, and the cyclic process of cold-producing medium is:
Compressor 1 discharges the first connector D1 of high temperature and high pressure gas → the first cross valve 2 and the 5th connector D2 the 7th connector C2 → condensation heat release in heated condenser 5 of the 3rd connector C1 → the second cross valve 3, discharge highly pressurised liquid → the first check valve 10 → two-way four-pipe system high pressure fluid reservoir 17 → become Low temperature low pressure liquid → absorb heat in indoor evaporator 7 in the 3rd electric expansion valve 13 throttling, discharge separation gas, liquid refrigerants → gaseous coolant in the 8th connector E2 of low-pressure gas → the second cross valve 3 and the 6th connector S2 → gas-liquid separator 18 and enter compressor 1.
Example 8: the first cross valve 2, second cross valve 3 is closed condition; Second electric expansion valve 11, the 3rd electric expansion valve 13 are closed condition; 4th electric expansion valve 15 is auto state.Heat pump runs on water heating and indoor refrigeration mode, and the cyclic process of cold-producing medium is:
Compressor 1 discharges the first connector D1 of high temperature and high pressure gas → the first cross valve 2 and the 5th connector D2 of the 3rd connector C1 → the second cross valve 3 and the 7th connector C2 → condensation heat release in heated condenser 5, discharge highly pressurised liquid → the first check valve 10 → two-way four-pipe system high pressure fluid reservoir 17 → become Low temperature low pressure liquid → absorb heat in air reheater 8 in the 4th electric expansion valve 15 throttling, discharge separation gas in the 12 capillary E3 of low-pressure gas → the 3rd cross valve 4 and the tenth capillary S3 → gas-liquid separator 18, liquid refrigerants → gaseous coolant enters compressor 1.
Example 7 and example 8 heat pump all run on water heating and indoor refrigeration mode.On the hot summer days in summer of sweltering heat, room temperature is often very high, need suitable cooling, simultaneously, consider the comfort level of human body, need when swimming pool carries out changing water to carry out suitable heating to newly changing water, the heat pump of the present embodiment is adopted to run on water heating and indoor refrigeration mode, can suitably heating be carried out to Chi Shui and reduce room temperature to a certain extent, and there is the circulation canal of two kinds of cold-producing mediums, the position of installing due to indoor evaporator 7 and air reheater 8 can be different, thus adopt different circulation canals can realize adjacent or close different places reach water heating respectively or simultaneously and the effect of indoor refrigeration, and utilize identical heated condenser 5, save cost, improve utilization rate of equipment and installations.
Example 9: the first cross valve 2 is closed condition, and the second cross valve 3 is open mode; Second electric expansion valve 11, the 4th electric expansion valve 15 are closed condition; First electric expansion valve 9 is automatically regulate aperture state; Heat pump runs on chilled water and indoor heating pattern, and the cyclic process of cold-producing medium is:
Compressor 1 discharges the first connector D1 of high temperature and high pressure gas → the first cross valve 2 and the 5th connector D2 of the 3rd connector C1 → the second cross valve 3 and the 8th connector E2 → condensation heat release in indoor evaporator 7, discharge highly pressurised liquid → the 3rd check valve 14 → two-way multitube high pressure fluid reservoir 17 → become Low temperature low pressure liquid → heat absorption in heated condenser 5 in the first electric expansion valve 9 throttling, discharge separation gas in the 7th connector C2 of low-pressure gas → the second cross valve 3 and the 6th connector S2 → gas-liquid separator 18, liquid refrigerants → gaseous coolant enters compressor 1.
Example 10: the first cross valve 2 and the 3rd cross valve 4 are open mode; Second electric expansion valve 11 and the 3rd electric expansion valve 13 are closed condition; And first electric expansion valve 9 be automatically regulate aperture state.Heat pump runs on chilled water and indoor heating pattern, and the cyclic process of cold-producing medium is:
Compressor 1 discharges the first connector D1 of high temperature and high pressure gas → the first cross valve 2 and the 9th connector D3 of the 4th connector E1 → the 3rd cross valve 4 and the 12 connector E3 → condensation heat release in air reheater 8, discharge highly pressurised liquid → the 4th check valve 16 → two-way multitube high pressure fluid reservoir 17 → become Low temperature low pressure liquid → heat absorption in heated condenser 5 in the first electric expansion valve 9 throttling, discharge separation gas in the 7th connector C2 of low-pressure gas → the second cross valve 3 and the 3rd connector C1 of the 5th connector D2 → the first cross valve 2 and the second connector S1 → gas-liquid separator 18, liquid refrigerants → gaseous coolant enters compressor 1.
Example 9 and example 10 heat pump all run on chilled water and indoor heating pattern time, when occur in swimming pool that indoor temperature is lower and the situation that pond water temperature is higher time, chilled water is run on and indoor heating pattern by adopting the heat pump of this embodiment, indoor temperature can be raised while reduction pond water temperature, and there is the circulation canal of two kinds of cold-producing mediums, the position of installing due to indoor evaporator 7 and air reheater 8 can be different, thus adopt different circulation canals can realize adjacent or close different places reach chilled water respectively and the effect of indoor heating, and utilize identical heated condenser 5, save cost, improve utilization rate of equipment and installations.
Example 11: the first cross valve the 2, the 3rd cross valve 4 is open mode; First electric expansion valve 9, second electric expansion valve 11 is closed condition; 3rd electric expansion valve 13 is automatically regulate aperture state.Heat pump runs on room air constant temperature dehumidification mode, and the cyclic process of cold-producing medium is:
Compressor 1 is discharged the condensation heat release of the first connector D1 of high temperature and high pressure gas → the first cross valve 2 and the 9th connector D3 of the 4th connector E1 → the 3rd cross valve 4 and the 12 connector E3 → in air reheater 8 and is realized air reheating, discharge highly pressurised liquid → the 4th check valve 16 → two-way multitube high pressure fluid reservoir 17 → become the heat absorption of Low temperature low pressure liquid → in indoor evaporator 7 to realize air cooling-down in the 3rd electric expansion valve 13 throttling to dehumidify, discharge separation gas in the 8th connector E2 of low-pressure gas → the second cross valve 3 and the 6th connector S2 → gas-liquid separator 18, liquid refrigerants → gaseous coolant enters compressor 1.
Example 12: the first cross valve 2 is closed condition, and the second cross valve 3 is open mode; First electric expansion valve 9, second electric expansion valve 11 is closed condition; 4th electric expansion valve 15 is automatically regulate aperture state.Heat pump runs on room air constant temperature dehumidification mode, and the cyclic process of cold-producing medium is:
Compressor 1 is discharged the condensation heat release of the first connector D1 of high temperature and high pressure gas → the first cross valve 2 and the 5th connector D2 of the 3rd connector C1 → the second cross valve 3 and the 8th connector E2 → in indoor evaporator 7 and is realized air reheating, discharge highly pressurised liquid → the 3rd check valve 14 → two-way multitube high pressure fluid reservoir 17 → become the heat absorption of Low temperature low pressure liquid → in air reheater 8 to realize air cooling-down in the 4th electric expansion valve 15 throttling to dehumidify, discharge separation gas in the 12 connector E3 of low-pressure gas → the 3rd cross valve 4 and the tenth connector S3 → gas-liquid separator 18, liquid refrigerants → gaseous coolant enters compressor 1.
Due to the reason of weather and Special geographical position, the spring of some region has a humid climate, temperature is lower, as, the southern most area of China, in the spring of these regions, not only there was dampness in the air but also temperature is on the low side in indoor, therefore need to carry out reheating to while indoor air dehumidification, to ensure that room air constant temperature dehumidifies.By the heat pump of this embodiment, not only reach and reduce the object of indoor humidity, and according to the requirement of indoor air temperature, the object of air reheating can be reached.Thus adopt the heat pump of the present embodiment not need special dehumidification equipment, drastically increase the utilization rate of equipment.
Adopt the control method of this embodiment, heat pump can run the cyclic process of different patterns by multiple different cold-producing medium to reach following multi-effect, comprise: water heating, chilled water, indoor refrigeration, indoor heating, water heating+indoor refrigeration, chilled water+indoor heating, constant indoor temperature dehumidifying etc., in component loops process, the on off state of cross valve and electric expansion valve is summarized as follows shown in table:
It should be noted that, in the table, "/" represents state and has nothing to do, and such as, when water heating, has nothing to do with the state of the 3rd cross valve 4, but should close from the service life of energy-conservation angle and cross valve, i.e. no power; " standard-sized sheet " is in order to SR is reached minimum, in fact the electric expansion valve of " standard-sized sheet " be in any one aperture state can, comprise buttoned-up status.
Control method 2: the conversion being controlled the stream of heat pump by the open and-shut mode controlling any two cross valves in the first cross valve 2, second cross valve 3, the 3rd cross valve 4; And being in closed condition by any one electric expansion valve in control first electric expansion valve 9, second electric expansion valve 11, the 3rd electric expansion valve 13 and the 4th electric expansion valve 15, another two electric expansion valves are in and automatically regulate aperture state to control the opening and closing degree of the stream of heat pump arbitrarily.
Adopt this control method, make to access a condenser and two evaporimeters in refrigerant circulation loop, by the combinations of states of different cross valve and different electric expansion valve, realize multiple refrigeration or the heat-production functions of heat pump.
The concrete course of work is similar to control method 1, will not enumerate herein, and the on off state only providing cross valve and electric expansion valve in cyclic process is summarized as follows shown in table:
Control method 3: the conversion being controlled heat pump stream by the open and-shut mode controlling any two cross valves in the first cross valve 2, second cross valve 3, the 3rd cross valve 4; And be in the automatic opening and closing degree regulating aperture state to control heat pump stream by controlling to state any three electric expansion valves in the first electric expansion valve 9, second electric expansion valve 11, the 3rd electric expansion valve 13 and the 4th electric expansion valve 15.
Adopt this control method, make to access a condenser and three evaporimeters in refrigerant circulation loop, by the combinations of states of different cross valve and different electric expansion valve, realize multiple refrigeration or the heat-production functions of heat pump.
The concrete course of work is similar to control method 1, will not enumerate herein, and the on off state only providing cross valve and electric expansion valve in cyclic process is summarized as follows shown in table:
By above three kinds of control methods, open or close by what regulate cross valve and electric expansion valve and check valve the trend regulating cold-producing medium, the circulating mass of refrigerant difference existed between plurality of operating modes is regulated by two-way multitube high pressure fluid reservoir, system can realize multimodal operation, according to the difference of physical condition, heat pump adopts suitable operational mode, meets various operating mode and can run on different places.
In any one heat pump control method provided by the invention, in the first cross valve, the second cross valve and the 3rd cross valve, do not kept closed condition by the cross valve controlling open and-shut mode.Adopt closed condition can save the energy and extend the life-span of cross valve.Be not in first electric expansion valve, the second electric expansion valve, the 3rd electric expansion valve and the 4th electric expansion valve and automatically regulate aperture state and the electric expansion valve maintenance full-gear not being in closed condition, SR reaches minimum.
Compared with constant temperature and humidity swimming pool air-conditioning in the past, heat pump of the present invention improves existing swimming pool heat pump set system, other function multiple is increased under the prerequisite not changing its original function, by the cyclic process of multiple different cold-producing medium, make pond water cooling and warming, room air cooling and warming can independently realize or adopt the mode of recuperation of heat to combine realization, make the cooling or heating effect of heat pump better, and, unit adopts split design can also be applied to multiple different spaces air-treatment, different water system realizes conbined usage, the recuperation of heat method of operation under various modes can make unit operation more efficient, stable, both the cooling or heating effect of heat pump had been enhanced, turn improve the utilization rate of equipment, source pump is made to have practicality, energy saving, the advantage such as the feature of environmental protection and widespread popularity.
As can be seen from the above description, adopt heat pump of the present invention, can make refrigeration or heating effect better, the effect such as simultaneously reach practicality, energy-saving and environmental protection and be widely used.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (7)

1. a heat pump, is characterized in that comprising:
Compressor (1);
First cross valve (2), there is the first connector (D1), the second connector (S1), the 3rd connector (C1), the 4th connector (E1), wherein, described first connector (D1) is connected with the first end of described compressor (1), and described second connector (S1) is connected with the second end of described compressor (1);
Second cross valve (3), there is the 5th connector (D2), the 6th connector (S2), the 7th connector (C2), the 8th connector (E2), wherein, described 5th connector (D2) is connected with described 3rd connector (C1), and described 6th connector (S2) is connected with the second end of described compressor (1);
3rd cross valve (4), there is the 9th connector (D3), the tenth connector (S3), the 11 connector (C3), the 12 connector (E3), wherein, described 9th connector (D3) is connected with described 4th connector (E1), and described tenth connector (S3) is connected with the second end of described compressor (1);
First Heat Exchanger (5), first end is connected with described 7th connector (C2);
Second heat exchanger (6), first end is connected with described 11 connector (C3);
3rd heat exchanger (7), first end is connected with described 8th connector (E2);
4th heat exchanger (8), first end is connected with described 12 connector (E3);
First throttle assembly, first end is connected with the second end of described First Heat Exchanger (5);
Second orifice union, first end is connected with the second end of described second heat exchanger (6);
3rd orifice union, first end is connected with the second end of described 3rd heat exchanger (7);
4th orifice union, first end is connected with the second end of described 4th heat exchanger (8); And
Second end of described first throttle assembly, described second orifice union, described 3rd orifice union and described 4th orifice union connects and conducting between two,
Wherein:
Described first throttle assembly to close first electric expansion valve (9) of cut-off and the parallel-connection structure of the first check valve (10);
Described second orifice union to close second electric expansion valve (11) of cut-off and the parallel-connection structure of the second check valve (12);
Described 3rd orifice union to close the 3rd electric expansion valve (13) of cut-off and the parallel-connection structure of the 3rd check valve (14);
Described 4th orifice union to close the 4th electric expansion valve (15) of cut-off and the parallel-connection structure of the 4th check valve (16),
Described heat pump also comprises:
The multitube high pressure fluid reservoir (17) two-way circulated, is connected with the second end of described first throttle assembly, described second orifice union, described 3rd orifice union, described 4th orifice union,
Wherein, adopt the orifice union of parallel-connection structure as heat pump of electric expansion valve and check valve, by the different conditions of electric expansion valve and being limited by direction of check valve, realize throttling or regulate refrigerant flow direction.
2. heat pump according to claim 1, is characterized in that, also comprises:
Gas-liquid separator (18), one end is connected with described compressor (1) second end, and the other end is connected with described second connector (S1), described 6th connector (S2) and described tenth connector (S3).
3. a control method for heat pump according to claim 1, is characterized in that:
The conversion of the stream of described heat pump is controlled by the open and-shut mode controlling any two cross valves in described first cross valve (2), described second cross valve (3), described 3rd cross valve (4); And
Be in closed condition by controlling any two electric expansion valves in described first electric expansion valve (9), described second electric expansion valve (11), described 3rd electric expansion valve (13) and described 4th electric expansion valve (15), another electric expansion valve is in and automatically regulates aperture state to control the opening and closing degree of the stream of described heat pump arbitrarily.
4. a control method for heat pump according to claim 1, is characterized in that:
The conversion of the stream of described heat pump is controlled by the open and-shut mode controlling any two cross valves in described first cross valve (2), described second cross valve (3), described 3rd cross valve (4); And
Be in closed condition by controlling any one electric expansion valve in described first electric expansion valve (9), described second electric expansion valve (11), described 3rd electric expansion valve (13) and described 4th electric expansion valve (15), another two electric expansion valves are in and automatically regulate aperture state to control the opening and closing degree of the stream of described heat pump arbitrarily.
5. a control method for heat pump according to claim 1, is characterized in that:
The conversion of described heat pump stream is controlled by the open and-shut mode controlling any two cross valves in described first cross valve (2), described second cross valve (3), described 3rd cross valve (4); And
The automatic opening and closing degree regulating aperture state to control described heat pump stream is in by controlling any three electric expansion valves in described first electric expansion valve (9), described second electric expansion valve (11), described 3rd electric expansion valve (13) and described 4th electric expansion valve (15).
6. the control method of the heat pump according to any one of claim 3 to 5, is characterized in that:
Closed condition is not kept by the cross valve controlling open and-shut mode in described first cross valve (2), described second cross valve (3) and described 3rd cross valve (4).
7. the control method of the heat pump according to any one of claim 3 to 5, is characterized in that:
Be not in described first electric expansion valve (9), described second electric expansion valve (11), described 3rd electric expansion valve (13) and described 4th electric expansion valve (15) and automatically regulate aperture state and the electric expansion valve maintenance full-gear not being in closed condition.
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