CN112082284A - Heat pump system with double suction and exhaust functions and control method - Google Patents
Heat pump system with double suction and exhaust functions and control method Download PDFInfo
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- CN112082284A CN112082284A CN202010984843.5A CN202010984843A CN112082284A CN 112082284 A CN112082284 A CN 112082284A CN 202010984843 A CN202010984843 A CN 202010984843A CN 112082284 A CN112082284 A CN 112082284A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000003507 refrigerant Substances 0.000 claims abstract description 242
- 238000010438 heat treatment Methods 0.000 claims description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 238000001816 cooling Methods 0.000 claims description 28
- 238000007791 dehumidification Methods 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 15
- 239000013589 supplement Substances 0.000 claims description 12
- 239000008236 heating water Substances 0.000 claims description 5
- 230000001502 supplementing effect Effects 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 abstract description 8
- 230000005494 condensation Effects 0.000 abstract description 7
- 238000009833 condensation Methods 0.000 abstract description 7
- 230000008020 evaporation Effects 0.000 abstract description 6
- 238000005057 refrigeration Methods 0.000 description 11
- 230000007246 mechanism Effects 0.000 description 10
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Mechanical Engineering (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention provides a heat pump system with double suction and exhaust functions and a control method, relates to the technical field of compressors, and provides a novel heat pump system. The heat pump system comprises a compressor and two refrigerant loops, wherein the two refrigerant loops are respectively connected with different air suction ports and different air exhaust ports on the compressor, condensers and evaporators are arranged on the two refrigerant loops, a connecting pipeline is arranged between the two refrigerant loops, and the opening and closing of a valve in the heat pump system are adjusted to enable the refrigerants on the two refrigerant loops to flow back to the compressor through the same evaporator. The invention can realize two different condensation/evaporation temperatures, and improve the utilization rate of equipment and the energy efficiency of a system.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a heat pump system with double suction and exhaust functions and a control method.
Background
The main structure of the vapor compression refrigeration/heat pump system comprises a compressor, a condenser, an evaporator, a throttling device and the like. The working process is as follows: the low-temperature low-pressure liquid refrigerant absorbs heat from a low-temperature heat source in an evaporator and is gasified into low-pressure steam, then refrigerant gas is compressed into high-temperature high-pressure steam in a compressor, the high-temperature high-pressure gas is cooled and condensed into high-pressure liquid in a condenser, heat is released and heat absorbing working media (such as air and water) on the other side of a heat exchange tube are heated, and finally the high-temperature high-pressure steam is throttled into low-temperature low-pressure liquid refrigerant through a throttling element (such as a capillary tube, a thermal expansion valve, an electronic expansion valve and.
The patent publication CN105135729A provides a circulation system with dual condensing temperatures, which includes an evaporator and two condensers, and discloses a compressor with two exhaust ports, and the system achieves two different condensing temperatures through the two condensers, reduces the condensing temperature of part of the refrigerant, reduces the power consumption of the vapor compression refrigeration/heat pump compressor, is a single refrigeration or heating loop, and has simple system control, and cannot be flexibly adjusted when the actual load is variable.
The application provides a can be used for the refrigeration in summer, can be used for the two condensation temperature circulation systems that heat in winter again, improve equipment utilization and system efficiency.
Disclosure of Invention
The invention aims to provide a heat pump system with double suction and exhaust functions and a control method, and provides a novel heat pump system. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a heat pump system with double suction and exhaust functions, which comprises a compressor 1 and refrigerant loops, wherein two refrigerant loops are respectively connected with different air suction ports and different air exhaust ports on the compressor 1, condensers and evaporators are arranged on the two refrigerant loops, a connecting pipeline is arranged between the two refrigerant loops, and the opening and closing of a valve in the heat pump system are adjusted to enable the refrigerants on the two refrigerant loops to flow back to the compressor 1 through the same evaporator.
Furthermore, the number of the refrigerant loops is two, one of the refrigerant loops is a refrigerating/heating loop, one heat exchanger of the refrigerating/heating loop is located on the indoor side, and the other heat exchanger of the refrigerating/heating loop is located on the outdoor side.
Furthermore, the other refrigerant loop is a hot water heating loop, and a condenser of the hot water heating loop is positioned in the water tank.
Further, the evaporator of the hot water heating loop is a direct expansion type evaporator or an evaporator with a heat recovery function.
Furthermore, the other refrigerant loop is a dehumidification loop, and one heat exchanger of the dehumidification loop is positioned on the indoor side and used for indoor dehumidification.
Further, the compressor 1 is provided with an air supplement port 105, and the heat pump system further comprises an air supplement enthalpy increasing loop connected with the air supplement port 105.
Further, the compressor 1 includes a first exhaust port 101, a second exhaust port 102, a first intake port 103 and a second intake port 104, the refrigerant circuit includes a first refrigerant circuit 2 and a second refrigerant circuit 3, the first refrigerant circuit 2 is connected to the first exhaust port 101 and the first intake port 103, the second refrigerant circuit 3 is connected to the second exhaust port 102 and the second intake port 104, and refrigerant can flow back to the first intake port 103 through the first exhaust port 101 via a condenser, a throttle valve and an evaporator on the first refrigerant circuit 2 and can flow back to the second intake port 104 through the second exhaust port 102 via a condenser, a throttle valve and an evaporator on the second refrigerant circuit 3; the connection pipeline is connected between the first refrigerant loop 2 and the second refrigerant loop 3, and refrigerant passing through the condenser on the first refrigerant loop 2 and the condenser on the second refrigerant loop 3 can flow to the first air suction port 103 and the second air suction port 104 after passing through the evaporator on the first refrigerant loop 2 or the evaporator on the second refrigerant loop 3.
Further, the connection pipeline includes a first connection pipeline 4 and a second connection pipeline 5, when the refrigerants in the first refrigerant loop 2 and the second refrigerant loop 3 flow along a certain predetermined direction, the first connection pipeline 4 connects the liquid inlet side pipeline of the evaporator on the first refrigerant loop 2 and the liquid inlet side pipeline of the evaporator on the second refrigerant loop 3, and a valve is arranged on the first connection pipeline 4, the second connection pipeline 5 connects the liquid outlet side pipeline of the evaporator on the first refrigerant loop 2 and the liquid outlet side pipeline of the evaporator on the second refrigerant loop 3, and a valve is arranged on the second connection pipeline 5; a valve is arranged on one side, close to the evaporator of the first refrigerant loop 2, of the connecting position of the first connecting pipeline 4 and the first refrigerant loop 2, and/or a valve is arranged on one side, close to the evaporator of the first refrigerant loop 2, of the connecting position of the second connecting pipeline 5 and the first refrigerant loop 2; a valve is arranged on one side, close to the evaporator of the second refrigerant circuit 3, of the connecting position of the first connecting pipeline 4 and the second refrigerant circuit 3, and/or a valve is arranged on one side, close to the evaporator of the second refrigerant circuit 3, of the connecting position of the second connecting pipeline 5 and the second refrigerant circuit 3.
Further, an air supplementing port 105 is arranged on the compressor 1, a flash evaporator 6 is arranged on the first refrigerant loop 2, the flash evaporator 6 is arranged between an evaporator and a condenser on the first refrigerant loop 2, the flash evaporator 6 is connected with the air supplementing port 105, and a second throttle valve 23 and a third throttle valve 24 are respectively arranged on two sides of the flash evaporator 6; a first throttle valve 7 is arranged between the evaporator and the condenser on the second refrigerant circuit 3.
Further, a first four-way reversing valve 8 is arranged on the first refrigerant circuit 2, and the refrigerant discharged from the first exhaust port 101 can flow to the condenser and the evaporator on the first refrigerant circuit 2 through the first four-way reversing valve 8 and can flow to the first intake port 103 through the first four-way reversing valve 8; the second refrigerant circuit 3 is provided with a second four-way reversing valve 9, and the refrigerant discharged from the second gas outlet 102 can flow to the condenser and the evaporator on the second refrigerant circuit 3 through the second four-way reversing valve 9 and can flow to the second gas suction port 104 through the second four-way reversing valve 9.
The control method of the heat pump system with double suction and exhaust comprises the following steps that two refrigerant loops are respectively connected with different suction ports and different exhaust ports on the compressor 1, a condenser and an evaporator are arranged on the two refrigerant loops, a connecting pipeline is arranged between the two refrigerant loops, and the opening and closing of a valve in the heat pump system are adjusted to change the flow direction of refrigerants in the system so as to realize different working modes.
Further, controlling the opening and closing of a valve in the heat pump system to realize a cooling/heating mode or a hot water heating mode or simultaneously realize the cooling/heating mode and the hot water heating mode; or, controlling the opening and closing of the valve in the heat pump system to realize the cooling/heating mode or the dehumidification mode or simultaneously realize the cooling mode and the dehumidification mode.
The invention provides a heat pump system with double suction and exhaust, wherein a compressor can be provided with two suction ports and two exhaust ports, two refrigerant loops are respectively connected with the corresponding suction ports and exhaust ports, two different condensation/evaporation temperatures can be realized on the system, and different refrigerant loops can be used for different purposes, such as simultaneous refrigeration/heating and hot water heating or simultaneous wet cooling and dehumidification, so as to improve the equipment utilization rate and the system energy efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic connection diagram of a heat pump system with double suction and exhaust according to an embodiment of the present invention.
FIG. 1-compressor; 101-a first exhaust port; 102-a second exhaust port; 103-a first suction port; 104-second suction port; 105-a gas supplementing port; 2-a first refrigerant loop; 3-a second refrigerant loop; 4-a first connecting line; 5-a second connecting line; 6-a flash evaporator; 7-a first throttle valve; 8-a first four-way reversing valve; 9-a second four-way reversing valve; 10-a first heat exchanger; 11-a second heat exchanger; 12-a third heat exchanger; 13-a fourth heat exchanger; 14-a first solenoid valve; 15-a second solenoid valve; 16-a third solenoid valve; 17-a fourth solenoid valve; 18-a fifth solenoid valve; 19-a sixth solenoid valve; 20-a seventh solenoid valve; 21-eighth solenoid valve; 22-ninth solenoid valve; 23-a second throttle valve; 24-a third throttle valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 1, the invention provides a heat pump system with double suction and exhaust, which comprises a compressor 1 and refrigerant circuits, wherein two refrigerant circuits are respectively connected with different air suction ports and different air exhaust ports on the compressor 1, a condenser and an evaporator are arranged on each refrigerant circuit, a connecting pipeline is arranged between the two refrigerant circuits, and the opening and closing of a valve in the heat pump system are adjusted to enable the refrigerants on the two refrigerant circuits to flow back to the compressor 1 through the same evaporator. According to the heat pump system provided by the invention, two air suction ports and two air exhaust ports can be arranged on the compressor, one refrigerant loop can be connected with one air suction port and one air exhaust port, the other refrigerant loop can be connected with the other air suction port and the other air exhaust port, and refrigerants can be discharged through the two air exhaust ports respectively and flow back to the compressor after passing through the two refrigerant loops respectively by adjusting the opening and closing conditions of the valve in the heat pump system; because a connecting pipeline is arranged between the two refrigerant loops, the refrigerants on the two refrigerant loops can flow back to the compressor 1 through the same evaporator by adjusting the valve in the heat pump system. Through setting up two refrigerant return circuits, can realize two kinds of different condensation/evaporating temperatures on the system, different refrigerant return circuits can be used for different usage to be used for improving the efficiency of equipment utilization and system.
As an optional implementation manner of the embodiment of the present invention, the number of the refrigerant circuits is two, one of the refrigerant circuits is a cooling/heating circuit, one heat exchanger of the cooling/heating circuit is located on an indoor side, and the other heat exchanger is located on an outdoor side. The cooling/heating circuit can be used for heating in winter and cooling in summer, referring to fig. 1, the first refrigerant circuit 2 can be a cooling/heating circuit, and during heating, refrigerant is discharged through the first exhaust port 101, flows to the first heat exchanger 10 through the first four-way reversing valve 8, then flows to the fourth heat exchanger 13 (outdoor heat exchanger), and flows back to the first air intake 103 through the first four-way reversing valve 8, so that the heating function is realized.
The other refrigerant loop is a hot water heating loop, and a condenser of the hot water heating loop is positioned in the water tank. Referring to fig. 1, the second refrigerant circuit 3 may be a hot water heating circuit, and when hot water needs to be produced, the refrigerant may be discharged through the second exhaust 102, and flow to the second heat exchanger 11 through the second four-way selector valve 9 (the second heat exchanger 11 is located in the water tank to heat water in the water tank), and then flow to the third heat exchanger 12 and flow to the second suction port 104 through the second four-way selector valve 9, so as to achieve a hot water producing function. Through two refrigerant return circuits, can realize refrigeration and the function of making hot water in summer, can realize heating and the function of making hot water in winter, solve to a certain extent and adopt the double-machine combination, occupation space big problem now.
Or the other refrigerant loop is a dehumidification loop, and one heat exchanger of the dehumidification loop is positioned on the indoor side and used for indoor dehumidification. Referring to fig. 1, the second refrigerant circuit 3 may be a dehumidification circuit, in this case, the second heat exchanger 11 may be located indoors, and when dehumidification is required, the refrigerant may be discharged through the second exhaust gas 102, flow to the second heat exchanger 11 (in this case, the second heat exchanger 11 is an evaporator) after passing through the third heat exchanger 12, and then flow to the second suction port 104 through the second four-way reversing valve 9, so as to achieve a dehumidification effect. Through two refrigerant circuits, the refrigeration and dehumidification functions can be realized simultaneously.
As an optional implementation manner of the embodiment of the present invention, when the second refrigerant circuit 3 is a hot water heating circuit, an evaporator of the hot water heating circuit is a direct expansion type evaporator or an evaporator with a heat recovery function. When hot water needs to be produced, the refrigerant is discharged through the second exhaust 102, flows to the second heat exchanger 11 through the second four-way reversing valve 9 (at this time, the second heat exchanger 11 is a condenser), then flows to the third heat exchanger 12 (at this time, the third heat exchanger 12 is an evaporator), the refrigerant inside the evaporator needs to absorb external heat, and when the third heat exchanger 12 has an evaporator with a heat recovery function, the gasification of the refrigerant inside the evaporator can be accelerated.
As an optional implementation manner of the embodiment of the present invention, the compressor 1 is provided with the air supplement port 105, and the heat pump system further includes an air supplement enthalpy increasing loop connected to the air supplement port 105, and the air supplement enthalpy increasing loop can improve the energy efficiency of the compressor.
As an optional implementation manner of the embodiment of the present invention, the compressor 1 includes a first exhaust port 101, a second exhaust port 102, a first intake port 103, and a second intake port 104, the refrigerant circuit includes a first refrigerant circuit 2 and a second refrigerant circuit 3, the first refrigerant circuit 2 is connected to the first exhaust port 101 and the first intake port 103, the second refrigerant circuit 3 is connected to the second exhaust port 102 and the second intake port 104, and the refrigerant can flow back to the first intake port 103 through the first exhaust port 101 via a condenser, a throttle valve, and an evaporator on the first refrigerant circuit 2, and can flow back to the second intake port 104 through the second exhaust port 102 via a condenser and a throttle valve on the second refrigerant circuit 3 via an evaporator; a connection pipeline is connected between the first refrigerant circuit 2 and the second refrigerant circuit 3, and refrigerant passing through the condenser on the first refrigerant circuit 2 and the condenser on the second refrigerant circuit 3 can flow to the first air suction port 103 and the second air suction port 104 after passing through the evaporator on the first refrigerant circuit 2 or the evaporator on the second refrigerant circuit 3.
The specific connection of the connecting lines may be as follows: the connecting pipeline comprises a first connecting pipeline 4 and a second connecting pipeline 5, when refrigerants in the first refrigerant loop 2 and the second refrigerant loop 3 flow along a certain preset direction, the first connecting pipeline 4 is connected with a liquid inlet side pipeline of an evaporator on the first refrigerant loop 2 and a liquid inlet side pipeline of an evaporator on the second refrigerant loop 3, a valve is arranged on the first connecting pipeline 4, the second connecting pipeline 5 is connected with a liquid outlet side pipeline of the evaporator on the first refrigerant loop 2 and a liquid outlet side pipeline of the evaporator on the second refrigerant loop 3, and a valve is arranged on the second connecting pipeline 5; a valve is arranged on one side, close to the evaporator of the first refrigerant loop 2, of the connecting position of the first connecting pipeline 4 and the first refrigerant loop 2, and/or a valve is arranged on one side, close to the evaporator of the first refrigerant loop 2, of the connecting position of the second connecting pipeline 5 and the first refrigerant loop 2; a valve is arranged on one side, close to the evaporator of the second refrigerant loop 3, of the connecting position of the first connecting pipeline 4 and the second refrigerant loop 3, and/or a valve is arranged on one side, close to the evaporator of the second refrigerant loop 3, of the connecting position of the second connecting pipeline 5 and the second refrigerant loop 3.
When the first connection pipe 4 is a cooling/heating circuit and the second refrigerant circuit 3 is a hot water heating circuit, the fourth solenoid valve 17 and the fifth solenoid valve 18 are closed, and the sixth solenoid valve 19 and the ninth solenoid valve 22 are opened, and when heating and hot water heating are realized, the flow direction of the refrigerant may be as follows: the refrigerant is discharged through the first exhaust port 101, flows to the first heat exchanger 10 through the first four-way selector valve 8, then flows to the third heat exchanger 12 through the first connecting line 4, is discharged through the second exhaust 102, flows to the second heat exchanger 11 through the second four-way selector valve 9, then also flows to the third heat exchanger 12, and the refrigerant passing through the third heat exchanger 12 respectively flows to the first four-way selector valve 8 and the second four-way selector valve 9, and respectively flows to the first suction port 103 and the second suction port 104 of the compressor 1.
As an optional implementation manner of the embodiment of the present invention, referring to fig. 1, an air supplement port 105 is disposed on a compressor 1, a flash evaporator 6 is disposed on a first refrigerant circuit 2, the flash evaporator 6 is disposed between an evaporator and a condenser on the first refrigerant circuit 2, the flash evaporator 6 is connected to the air supplement port 105, a second throttle valve 23 and a third throttle valve 24 are respectively disposed on two sides of the flash evaporator 6, and a first throttle valve 7 is disposed between the evaporator and the condenser on a second refrigerant circuit 3.
As an optional implementation manner of the embodiment of the present invention, a first four-way reversing valve 8 is disposed on the first refrigerant circuit 2, and the refrigerant discharged from the first exhaust port 101 can flow to the condenser and the evaporator on the first refrigerant circuit 2 through the first four-way reversing valve 8 and can flow to the first intake port 103 through the first four-way reversing valve 8; the second refrigerant circuit 3 is provided with a second four-way reversing valve 9, and the refrigerant discharged from the second exhaust port 102 can flow to the condenser and the evaporator on the second refrigerant circuit 3 through the second four-way reversing valve 9 and can flow to the second suction port 104 through the second four-way reversing valve 9.
When the first connection pipe 4 is a cooling/heating circuit and the second refrigerant circuit 3 is a hot water heating circuit, the refrigerant flow direction may be as follows:
(1) realize the functions of refrigeration and hot water heating (the sixth electromagnetic valve 19 and the ninth electromagnetic valve 22 are closed)
The first heat exchanger 10 realizes refrigeration, and the second heat exchanger 12 realizes hot water production;
the refrigerant passes through a first exhaust port 101 of the compressor 1, a first four-way reversing valve 8, then is condensed by a fourth heat exchanger 13 on the outdoor side, then passes through two throttling mechanisms, enters a first heat exchanger 10 for evaporation, and then returns to a first air suction port 103 of the compressor through the first four-way reversing valve 8;
meanwhile, the other path of cold is condensed by a second heat exchanger 11 after passing through a second four-way reversing valve 9 by a second exhaust port 102 of the compressor 1, then enters a third heat exchanger 12 through a throttling mechanism for evaporation, and then returns to a second air suction port 104 of the compressor through the second four-way reversing valve 9;
while the refrigerant flows through the first refrigerant circuit 2, if the air-replenishing solenoid valve (third solenoid valve 16) is opened, a part of the refrigerant passes through the third solenoid valve 16 and enters the air-replenishing port 105 of the compressor 1 while the refrigerant passes through the flash evaporator 6.
(2) Realize the functions of heating and hot water heating (the sixth electromagnetic valve 19 and the ninth electromagnetic valve 22 are closed)
The first heat exchanger 10 realizes heating, and the second heat exchanger 12 realizes heating water;
the refrigerant passes through a first exhaust port 101 of the compressor 1, passes through a first four-way reversing valve 8, is evaporated through a first heat exchanger 10, then passes through two throttling mechanisms, enters a fourth heat exchanger 13 on the outdoor side for condensation, and then returns to a first air suction port 103 of the compressor through the first four-way reversing valve 8;
meanwhile, the other path of cold is condensed by a second heat exchanger 11 after passing through a second four-way reversing valve 9 by a second exhaust port 102 of the compressor 1, then enters a third heat exchanger 12 through a throttling mechanism for evaporation, and then returns to a second air suction port 104 of the compressor through the second four-way reversing valve 9;
while the refrigerant flows through the first refrigerant circuit 2, if the air-replenishing solenoid valve (third solenoid valve 16) is opened, a part of the refrigerant passes through the third solenoid valve 16 and enters the air-replenishing port 105 of the compressor 1 while the refrigerant passes through the flash evaporator 6.
(3) Realize the functions of heating and hot water heating (the fourth electromagnetic valve 17 and the fifth electromagnetic valve 18 are closed)
The first heat exchanger 10 realizes heating, and the second heat exchanger 12 realizes heating water;
the refrigerant passes through a first four-way reversing valve 8 from a first exhaust port 101 of the compressor 1, is evaporated by a first heat exchanger 10, then passes through two throttling mechanisms, and is mixed with a second path of refrigerant;
meanwhile, a second path of refrigerant passes through a second four-way reversing valve 9 from a second exhaust port 102 of the compressor 1, is condensed by a second heat exchanger 11, then passes through a throttling mechanism, and is mixed with the first path of refrigerant;
the mixed refrigerant enters a third heat exchanger 12 to be evaporated, and then the refrigerant is divided into two branches to flow through a first four-way reversing valve 8 and a second four-way reversing valve 9 and respectively enter a first air suction port 103 and a second air suction port 104 of the compressor 1;
while the refrigerant flows through the first refrigerant circuit 2, if the air-replenishing solenoid valve (third solenoid valve 16) is opened, a part of the refrigerant passes through the third solenoid valve 16 and enters the air-replenishing port 105 of the compressor 1 while the refrigerant passes through the flash evaporator 6.
(4) Realize the functions of heating and hot water heating (the seventh electromagnetic valve 20 and the eighth electromagnetic valve 21 are closed)
The first heat exchanger 10 realizes heating, and the second heat exchanger 12 realizes heating water;
the refrigerant passes through a first four-way reversing valve 8 from a first exhaust port 101 of the compressor 1, is evaporated by a first heat exchanger 10, then passes through two throttling mechanisms, and is mixed with a second path of refrigerant;
meanwhile, a second path of refrigerant passes through a second four-way reversing valve 9 from a second exhaust port 102 of the compressor 1, is condensed by a second heat exchanger 11, then passes through a throttling mechanism, and is mixed with the first path of refrigerant;
the mixed refrigerant enters a fourth heat exchanger 13 to be evaporated, and then the refrigerant is divided into two branches to flow through a first four-way reversing valve 8 and a second four-way reversing valve 9 and respectively enter a first air suction port 103 and a second air suction port 104 of the compressor 1;
while the refrigerant flows through the first refrigerant circuit 2, if the air-replenishing solenoid valve (third solenoid valve 16) is opened, a part of the refrigerant passes through the third solenoid valve 16 and enters the air-replenishing port 105 of the compressor 1 while the refrigerant passes through the flash evaporator 6.
When the first connection pipe 4 is a cooling/heating circuit and the second refrigerant circuit 3 is a dehumidifying circuit, the refrigerant flow direction may be as follows:
(1) realize the refrigeration and dehumidification function (the sixth electromagnetic valve 19 and the ninth electromagnetic valve 22 are closed)
The first heat exchanger 10 realizes refrigeration, and the second heat exchanger 12 realizes dehumidification;
the refrigerant passes through a first exhaust port 101 of the compressor 1, a first four-way reversing valve 8, then is condensed by a fourth heat exchanger 13 on the outdoor side, then passes through two throttling mechanisms, enters a first heat exchanger 10 for evaporation, and then returns to a first air suction port 103 of the compressor through the first four-way reversing valve 8;
meanwhile, the other path of cold passes through a second air outlet 102 of the compressor 1, passes through a second four-way reversing valve 9, is evaporated through a third heat exchanger 12, then passes through a throttling mechanism, enters a second heat exchanger 11 for condensation, and then returns to a second air suction port 104 of the compressor through the second four-way reversing valve 9;
while the refrigerant flows through the first refrigerant circuit 2, if the air-replenishing solenoid valve (third solenoid valve 16) is opened, a part of the refrigerant passes through the third solenoid valve 16 and enters the air-replenishing port 105 of the compressor 1 while the refrigerant passes through the flash evaporator 6.
A control method of a heat pump system with double suction and exhaust functions comprises the following steps that two refrigerant loops are respectively connected with a different air suction port and an air exhaust port on a compressor, a condenser and an evaporator are arranged on the two refrigerant loops, a connecting pipeline is arranged between the two refrigerant loops, and the opening and closing of a valve in the heat pump system are adjusted to change the flow direction of refrigerants in the system so as to realize different working modes. Through setting up two refrigerant return circuits, can realize two kinds of different condensation/evaporating temperatures on the system, different refrigerant return circuits can be used for different usage to be used for improving the efficiency of equipment utilization and system.
The following modes can be achieved by controlling the opening and closing of the valves in the heat pump system: controlling the opening and closing of a valve in a heat pump system to realize a cooling/heating mode or a hot water making mode or simultaneously realize the cooling/heating mode and the hot water making mode; alternatively, the opening and closing of valves in the heat pump system are controlled to realize the cooling/heating mode or the dehumidification mode or to realize both the cooling mode and the dehumidification mode. The second refrigerant circuit 3 can realize hot water production or a dehumidification function according to different system configurations. When the system is configured such that the second refrigerant circuit 3 has a hot water making function, the cooling/heating mode may be implemented separately, or the hot water making mode may be implemented separately, or both the cooling/heating mode and the hot water making mode may be implemented simultaneously. When the system configuration is such that the second refrigerant circuit 3 has a dehumidification function, the cooling/heating mode may be implemented separately, or the dehumidification mode may be implemented separately, or both the cooling mode and the dehumidification mode may be implemented simultaneously.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within 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 (12)
1. A heat pump system with double suction and exhaust is characterized by comprising a compressor (1) and a refrigerant loop, wherein,
the two refrigerant loops are respectively connected with different air suction ports and different air exhaust ports on the compressor (1), condensers and evaporators are arranged on the two refrigerant loops, a connecting pipeline is arranged between the two refrigerant loops, and the opening and closing of a valve in the heat pump system are adjusted to enable the refrigerants on the two refrigerant loops to flow back to the compressor (1) through the same evaporator.
2. The heat pump system with double suction and exhaust functions as claimed in claim 1, wherein the number of the refrigerant circuits is two, one of the refrigerant circuits is a cooling/heating circuit, one heat exchanger of the cooling/heating circuit is located at an indoor side, and the other heat exchanger of the cooling/heating circuit is located at an outdoor side.
3. The heat pump system with double suction and exhaust functions as claimed in claim 2, wherein the other refrigerant circuit is a hot water heating circuit, and a condenser of the hot water heating circuit is located in the water tank.
4. The heat pump system with double suction and exhaust according to claim 3, wherein the evaporator of the hot water heating circuit is a direct expansion evaporator or an evaporator with heat recovery function.
5. The heat pump system with double suction and exhaust functions as claimed in claim 2, wherein the other refrigerant circuit is a dehumidification circuit, and one heat exchanger of the dehumidification circuit is located at an indoor side for indoor dehumidification.
6. The heat pump system with double suction and exhaust functions as claimed in claim 1, wherein the compressor (1) is provided with an air supplement port (105), and the heat pump system further comprises an air supplement enthalpy increasing loop connected with the air supplement port (105).
7. The heat pump system with double suction and exhaust functions as claimed in any one of claims 1 to 6, wherein the compressor (1) comprises a first exhaust port (101), a second exhaust port (102), a first intake port (103) and a second intake port (104), the refrigerant circuit comprises a first refrigerant circuit (2) and a second refrigerant circuit (3), the first exhaust port (101) and the first intake port (103) are connected to the first refrigerant circuit (2), the second refrigerant circuit (3) is connected with the second exhaust port (102) and the second intake port (104), and refrigerant can flow back to the first intake port (103) through the first exhaust port (101) via a condenser, a throttle valve and an evaporator on the first refrigerant circuit (2) and can flow back to the second intake port (103) through the second exhaust port (102) via a condenser on the second refrigerant circuit (3), The throttle valve and the evaporator flow back to the second suction port (104);
the connecting pipeline is connected between the first refrigerant loop (2) and the second refrigerant loop (3), and refrigerants passing through a condenser on the first refrigerant loop (2) and a condenser on the second refrigerant loop (3) can flow to the first air suction port (103) and the second air suction port (104) after passing through an evaporator on the first refrigerant loop (2) or an evaporator on the second refrigerant loop (3).
8. The heat pump system with double suction and exhaust functions as claimed in claim 7, wherein the connecting pipeline comprises a first connecting pipeline (4) and a second connecting pipeline (5), when the refrigerants in the first refrigerant loop (2) and the second refrigerant loop (3) flow along a certain predetermined direction, the first connecting pipeline (4) connects the liquid inlet side pipeline of the evaporator on the first refrigerant loop (2) and the liquid inlet side pipeline of the evaporator on the second refrigerant loop (3), the first connecting pipeline (4) is provided with a valve, the second connecting pipeline (5) connects the liquid outlet side pipeline of the evaporator on the first refrigerant loop (2) and the liquid outlet side pipeline of the evaporator on the second refrigerant loop (3), and the second connecting pipeline (5) is provided with a valve;
a valve is arranged on one side, close to the evaporator of the first refrigerant loop (2), of the connecting position of the first connecting pipeline (4) and the first refrigerant loop (2), and/or a valve is arranged on one side, close to the evaporator of the first refrigerant loop (2), of the connecting position of the second connecting pipeline (5) and the first refrigerant loop (2);
one side of the connecting position of the first connecting pipeline (4) and the second refrigerant circuit (3) close to the evaporator of the second refrigerant circuit (3) is provided with a valve, and/or one side of the connecting position of the second connecting pipeline (5) and the second refrigerant circuit (3) close to the evaporator of the second refrigerant circuit (3) is provided with a valve.
9. The heat pump system with double suction and exhaust functions as claimed in claim 7, wherein an air supplementing port (105) is formed in the compressor (1), a flash evaporator (6) is arranged on the first refrigerant circuit (2), the flash evaporator (6) is arranged between an evaporator and a condenser on the first refrigerant circuit (2), the flash evaporator (6) is connected with the air supplementing port (105), and a second throttle valve (23) and a third throttle valve (24) are respectively arranged on two sides of the flash evaporator (6); and a first throttle valve (7) is arranged between the evaporator and the condenser on the second refrigerant loop (3).
10. The heat pump system with double suction and exhaust functions as claimed in claim 7, wherein a first four-way reversing valve (8) is disposed on the first refrigerant circuit (2), and the refrigerant discharged from the first exhaust port (101) can flow to the condenser and the evaporator on the first refrigerant circuit (2) through the first four-way reversing valve (8) and can flow to the first intake port (103) through the first four-way reversing valve (8);
and a second four-way reversing valve (9) is arranged on the second refrigerant loop (3), and the refrigerant discharged from the second exhaust port (102) can flow to a condenser and an evaporator on the second refrigerant loop (3) through the second four-way reversing valve (9) and can flow to the second air suction port (104) through the second four-way reversing valve (9).
11. A control method of a heat pump system with double suction and exhaust functions as claimed in any one of claims 1 to 10, characterized in that two refrigerant circuits are provided to connect different suction ports and exhaust ports of the compressor (1), respectively, a condenser and an evaporator are provided on both of the two refrigerant circuits, a connecting pipeline is provided between the two refrigerant circuits, and the opening and closing of a valve in the heat pump system is adjusted to change the flow direction of the refrigerant in the system for realizing different operation modes.
12. The control method according to claim 11, wherein opening and closing of a valve in the heat pump system is controlled to realize a cooling/heating mode or a heating water mode or to realize both the cooling/heating mode and the heating water mode; or,
and controlling the opening and closing of a valve in the heat pump system to realize a cooling/heating mode or a dehumidification mode or simultaneously realize the cooling mode and the dehumidification mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010984843.5A CN112082284A (en) | 2020-09-18 | 2020-09-18 | Heat pump system with double suction and exhaust functions and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010984843.5A CN112082284A (en) | 2020-09-18 | 2020-09-18 | Heat pump system with double suction and exhaust functions and control method |
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| CN112082284A true CN112082284A (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010984843.5A Pending CN112082284A (en) | 2020-09-18 | 2020-09-18 | Heat pump system with double suction and exhaust functions and control method |
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Cited By (3)
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| CN111664606A (en) * | 2020-06-09 | 2020-09-15 | 青岛海尔新能源电器有限公司 | Heat pump system and heat pump water heater |
| CN115493295A (en) * | 2022-09-26 | 2022-12-20 | 珠海格力电器股份有限公司 | Control method and system of hot water unit and computer readable storage medium |
| CN116697476A (en) * | 2023-05-26 | 2023-09-05 | 浙江中广电器集团股份有限公司 | A heat pump system and its control method for automatic adjustment of liquid volume |
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