CN110762888A - Air energy heat pump system and control method thereof - Google Patents
Air energy heat pump system and control method thereof Download PDFInfo
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- CN110762888A CN110762888A CN201910987984.XA CN201910987984A CN110762888A CN 110762888 A CN110762888 A CN 110762888A CN 201910987984 A CN201910987984 A CN 201910987984A CN 110762888 A CN110762888 A CN 110762888A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 238000010438 heat treatment Methods 0.000 claims abstract description 45
- 238000005057 refrigeration Methods 0.000 claims abstract description 45
- 239000003507 refrigerant Substances 0.000 claims description 67
- 230000000737 periodic effect Effects 0.000 claims description 31
- 230000003111 delayed effect Effects 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 23
- 238000001816 cooling Methods 0.000 claims description 18
- 239000002826 coolant Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
- F25B2313/0292—Control issues related to reversing valves
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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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2515—Flow valves
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- General Engineering & Computer Science (AREA)
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Abstract
The invention belongs to the technical field of air energy heat pumps, and particularly relates to a control method of an air energy heat pump system, which comprises a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, a four-way reversing valve, a rectifying device and a plurality of throttling devices, wherein the first heat exchanger is connected with the compressor; a high-pressure air outlet is formed in the compressor, and a low-pressure air suction port is formed in the compressor and is positioned below the high-pressure air outlet; according to the invention, the four-way reversing valve, the throttling device and the rectifying device on the heat pump system are adjusted, so that the heat pump system can be switched and used in five modes of a refrigeration control mode, a heating control mode, a refrigeration and hot water supply control mode, a heating and hot water supply control mode and a single hot water return control mode, thereby not only preparing domestic hot water during refrigeration, but also providing domestic hot water during heating, and the heat pump system has a simple structure, is convenient for a user to control during use, and is convenient and fast to use.
Description
Technical Field
The invention relates to the technical field of air energy heat pumps, in particular to an air energy heat pump system and a control method thereof.
Background
The heat pump is a high-efficiency energy-saving device which fully utilizes low-grade heat energy, and the heat can be spontaneously transferred from a high-temperature object to a low-temperature object but can not be spontaneously carried out in the opposite direction. The working principle of the heat pump is a mechanical device which forces heat to flow from a low-temperature object to a high-temperature object in a reverse circulation mode, and the heat pump can obtain larger heat supply amount only by consuming a small amount of reverse circulation net work, and can effectively utilize low-grade heat energy which is difficult to apply to achieve the purpose of energy conservation. A compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas. The heat pump system in the prior art can be used as an air conditioner, can simultaneously provide hot water in a refrigeration/heating mode, realizes full heat recovery, and provides domestic hot water for people. However, the existing heat pump system has a complex structure when in use, high use cost and easy failure, so that the stability of the heat pump system is low, and the normal use of the heat pump system is further influenced.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide an air energy heat pump system and a control method thereof, wherein a four-way reversing valve, a throttling device and a rectifying device on the heat pump system are adjusted, so that the heat pump system can be switched to be used in five modes, namely a refrigeration mode, a heating mode, a refrigeration mode for simultaneously providing hot water, a heating mode for simultaneously providing hot water and a single-heat return mode, and can be used for preparing domestic hot water during refrigeration and providing domestic hot water during heating.
The purpose of the invention can be realized by the following technical scheme:
an air energy heat pump system comprises a heat pump system, wherein the heat pump system comprises a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, a four-way reversing valve, a rectifying device and a throttling device; wherein,
a high-pressure air outlet is formed in the compressor, and a low-pressure air suction port is formed in the compressor and is positioned below the high-pressure air outlet;
the four-way reversing valve comprises a first interface, a second interface, a third interface and a fourth interface; the four-way reversing valve can be used for adjusting the flow direction of the refrigerant;
a first coil and a second coil are arranged inside the first heat exchanger, a first port and a second port are respectively arranged at two ends of the first heat exchanger, which correspond to the first coil, and a third port and a fourth port are respectively arranged at two ends of the first heat exchanger, which correspond to the second coil; the first port is communicated with the first port of the conduit; the second interface is communicated with the high-pressure air outlet through a conduit; the second port is communicated with the low-pressure air suction port through a conduit; the third port is communicated with the second port through a conduit; the fourth port is communicated with a third heat exchanger through a guide pipe;
a fifth port and a sixth port are arranged on the second heat exchanger; the fifth port is communicated with the fourth interface through a conduit; the sixth port is communicated with a third heat exchanger through a conduit; throttling devices are arranged between the fourth port and the sixth port and between the first interface and the second port;
a seventh port and an eighth port are arranged on the third heat exchanger; a throttling device is arranged between the sixth port and the eighth port; the seventh port is communicated with the third interface through a conduit;
the throttling device is at least provided with a first throttling device, a second throttling device and a third throttling device; the first throttling device is arranged between the second port and the first interface; the second flow restriction is disposed between the third port and the second port; the control mode switching of the air energy heat pump system is facilitated, and the working efficiency is improved;
the rectifying devices at least comprise a first rectifying device, a second rectifying device, a third rectifying device and a fourth rectifying device; the air source heat pump system is convenient to use in cooperation with a throttling device, and the working efficiency of the air source heat pump system is further improved.
Further, the method comprises the following steps: the rectifying devices are arranged in a plurality of numbers, and at least one rectifying device is arranged on a guide pipe connected with the eighth port when the sixth port is used for refrigerating, on a guide pipe connected with the sixth port when the eighth port is used for heating, on a guide pipe connected with the fourth port and the sixth port, and on a guide pipe connected with the fourth port and the eighth port.
Further, the method comprises the following steps: a three-way valve is arranged on the conduit connected with the second port; one interface of the three-way valve is connected with the four-way reversing valve through a conduit, and the other interface of the three-way valve is connected with the third interface through a conduit.
Further, the method comprises the following steps: the first interface, the second interface, the third interface and the fourth interface are used for being switched on and switched off according to the state of the heat pump system.
Further, the method comprises the following steps: the vertical center lines of the first coil pipe and the second coil pipe are positioned in the same vertical plane, and the first coil pipe is positioned above the second coil pipe; utilize first coil pipe and second coil pipe can make the difference in temperature between the temperature of the inside water everywhere of water tank reduce under the condition of the inside temperature layering of water tank.
A control method of an air energy heat pump comprises a refrigeration and hot water supply control mode, a refrigeration control mode, a heating and hot water supply control mode, a heating control mode and a single-heat return water control mode; wherein,
the cooling while supplying hot water control mode includes: opening the first throttling device, closing the second throttling device, enabling the first coil pipe to work, enabling the low-pressure air suction port to suck evaporated low-temperature low-pressure gaseous refrigerant, enabling the high-pressure air outlet to discharge the compressed high-temperature high-pressure gaseous refrigerant into the guide pipe, leading the compressed high-temperature high-pressure gaseous refrigerant into the first coil pipe through the first port, leading the compressed high-temperature high-pressure gaseous refrigerant into the four-way reversing valve through the first port, enabling the compressed high-temperature high-pressure gaseous refrigerant to flow into the seventh port through the third port and then flow out from the eighth port, enabling the flowing high-temperature high-pressure liquid refrigerant to flow into the second heat exchanger through the third throttling device and the third rectifying device, and leading the flowing;
the cooling control mode includes: the first throttling device is opened, the second throttling device is closed, the first coil pipe works, the low-pressure air suction port sucks low-temperature and low-pressure gaseous refrigerant, the gaseous refrigerant compressed into high-temperature and high-pressure gas is guided into the first coil pipe from the high-pressure gas outlet through the guide pipe, then flows into the four-way reversing valve through the first interface, flows into the second heat exchanger through the fourth interface, flows out from the sixth port, flows into the third heat exchanger through the sixth port and the third rectifying device, flows into the third interface through the seventh port, flows out through the second interface, and is guided into the low-pressure air suction port of the compressor, and circulation is completed;
the heating simultaneous provision hot water control mode includes: the first throttling device is closed, the second throttling device is opened, the low-pressure air suction port sucks the evaporated low-temperature low-pressure gaseous refrigerant, then the low-temperature low-pressure gaseous refrigerant flows through the first coil pipe and the second coil pipe and flows out through the fourth port, domestic water is heated in the first coil pipe and the second coil pipe, so that high-temperature high-pressure liquid refrigerant is formed, the flowing high-temperature high-pressure liquid refrigerant is guided into the second heat exchanger through the third throttling device and the third rectifying device, flows into the four-way reversing valve through the fifth port and then flows into the low-pressure air suction port, and circulation is completed;
the heating control mode comprises: the first throttling device is opened, the second throttling device is closed, the first coil pipe works, the low-pressure air suction port sucks evaporated low-temperature and low-pressure gaseous refrigerant, the low-temperature and low-pressure gaseous refrigerant is compressed by the compressor and then is led into the first coil pipe, then is led into the four-way reversing valve, is led into the second heat exchanger through the fourth interface, is led into the third heat exchanger through the first rectifying device, the third rectifying device and the fourth rectifying device after heat exchange, is led into the four-way reversing valve through the seventh port, and is led into the low-pressure air suction port again, and circulation is completed;
the single hot water return control mode comprises: the first throttling device is closed, the second throttling device is opened, the first coil pipe and the second coil pipe work, the low-pressure air suction port sucks the evaporated low-temperature low-pressure gaseous refrigerant, the low-temperature low-pressure gaseous refrigerant flows through the first coil pipe and the second coil pipe, the formed high-temperature high-pressure liquid refrigerant is guided into the third heat exchanger through the third throttling device and the fourth rectifying device and then is guided into the low-pressure air suction port through the four-way reversing valve, and the circulation is completed.
Further, the method comprises the following steps: the cooling and hot water simultaneous supply control mode comprises the following steps:
the refrigeration and hot water supply control mode is switched to a refrigeration control mode, the capacity of the compressor is adjusted, the second throttling device is opened after T2 time delay, the first throttling device is closed after T3 time, and the first throttling device is closed after T3 time every T2 time, so that the cycle processing is carried out, and oil return is guaranteed;
the refrigeration and hot water supply control mode is switched to the heating control mode, the four-way reversing valve is switched, and then after the T2 time, the second throttling device is opened for T3 time and then closed for periodic processing to ensure oil return;
and after the T2 time, the second throttling device is closed after the T3 time, and is opened for periodic processing to ensure oil return.
Further, the method comprises the following steps: the cooling control mode includes the steps of:
the refrigeration control mode is switched to a refrigeration and hot water supply control mode, the four-way reversing valve is switched, after T2 time is delayed, the first throttling device is opened, after T3 time, the second throttling device is closed, after every T2 time, the second throttling device is opened for T3 time and then closed, periodic processing is carried out, and oil return is guaranteed;
the refrigeration control mode is switched to a heating control mode, a fan on the heat exchanger is started, after the time of T4 is delayed, the first throttling device and the second throttling device are opened, the time of T5 is delayed, the second throttling device is closed, after the time of T6 is delayed again, the four-way reversing valve is switched, after every T2 time, the second throttling device is closed after the time of T3 is started, periodic processing is carried out, and oil return is guaranteed;
the refrigeration control mode is switched to a single hot water return control mode, a fan on the heat exchanger is started, after the time delay of T7 is long, the first throttling device is opened, the second throttling device is closed after the time delay of T8 is long, the four-way reversing valve is switched after the time T9, after the time T10 is passed, the second throttling device is opened, then the first throttling device is closed, after the time T2 is passed, the first throttling device is closed after the time T3 is opened, the periodic treatment is carried out, and the oil return is guaranteed.
Further, the method comprises the following steps: the heating control mode comprises the following steps:
the heating control mode is switched to a cooling and hot water supply control mode, the four-way reversing valve is switched, and after the T2 time, the second throttling device is opened for T3 time and then closed for periodic processing to ensure oil return;
the heating control mode is switched to the refrigeration control mode, the four-way reversing valve is switched, then the second throttling device is opened, the first throttling device is closed after the time delay of T11 is prolonged, and then the first throttling device is closed after the time T3 is opened every time T2 time, periodic processing is carried out, and oil return is guaranteed;
and the heating control mode is switched to a single hot water return control mode, the second throttling device is opened, the first throttling device is closed after the time of T12 is delayed, and then after every T2 time, the first throttling device is closed after the time of T3 is started, so that the periodic treatment is carried out, and the oil return is ensured.
Further, the method comprises the following steps: the single hot water return control mode comprises the following steps:
the single-heat backwater control mode is switched to a refrigeration and hot water supply control mode, the first throttling device is opened, the time T13 is delayed, the first throttling device is closed, then the four-way reversing valve is switched, and after the T2 time, the second throttling device is opened for T3 time and then closed for periodic processing to ensure oil return;
the single-heat backwater control mode is switched to a refrigeration control mode, the first throttling device is opened, the second throttling device is closed after T14 time is delayed, then the four-way reversing valve is switched, the second throttling device is opened, the first throttling device is closed, and after T2 time, the first throttling device is closed after T3 time is started, periodic processing is carried out, and oil return is guaranteed;
and the single hot water return control mode is switched to a heating control mode, the second throttling device is closed, and after the T2 time, the second throttling device is closed after being opened for T3 time, periodic treatment is carried out, and oil return is guaranteed.
The invention has the beneficial effects that:
1. through adjusting the four-way reversing valve, the throttling device and the rectifying device on the heat pump system, the heat pump system can be switched and used in five modes of a refrigeration mode, a heating mode, the refrigeration and the hot water supply simultaneously, the heating and the hot water supply simultaneously and the single hot water return mode simultaneously, so that the domestic hot water can be prepared during the refrigeration and the domestic hot water can be provided during the heating, the heat pump system is simple in structure, a user can conveniently control the heat pump system during the use, and the use is convenient.
2. Through arranging first coil pipe in the top of second coil pipe, utilize two coil pipes to make the difference in temperature between the temperature of the inside water everywhere of water tank reduce under the condition of the inside temperature layering of water tank to first coil pipe and second coil pipe can effectively reduce condensing temperature, and can improve the leaving water temperature of water tank, are favorable to increasing this air can heat pump system's application environment, improve the stability that this air can heat pump system used, and application range is wide.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a block diagram of an air-energy heat pump system according to the present invention;
in the figure: 110. a compressor; 111. a high pressure gas outlet; 112. a low-pressure air suction port; 120. a first heat exchanger; 121. a first port; 122. a second port; 123. a third port; 124. a fourth port; 125. a first coil pipe; 126. a second coiled tube; 130. a second heat exchanger; 131. a fifth port; 132. a sixth port; 140. a third heat exchanger; 141. a seventh port; 142. an eighth port; 150. a four-way reversing valve; 151. a first interface; 152. a second interface; 153. a third interface; 154. a fourth interface; 160. a throttling device; 161. a first throttling device; 162. a second throttling device; 163. a third throttling means; 170. a rectifying device; 171. a first rectifying device; 172. a second rectifying device; 173. a third rectifying device; 174. and a fourth rectifying device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an air-source heat pump system includes a heat pump system, which includes a compressor 110, a first heat exchanger 120, a second heat exchanger 130, a third heat exchanger 140, a four-way reversing valve 150, a rectifying device 170, and a throttling device 160; wherein,
a high-pressure air outlet 111 is arranged on the compressor 110, and a low-pressure air suction port 112 is arranged on the compressor 110 below the high-pressure air outlet 111;
the four-way reversing valve 150 comprises a first port 151, a second port 152, a third port 153 and a fourth port 153; the four-way reversing valve 150 can be used for adjusting the flow direction of the refrigerant;
a first coil 125 and a second coil 126 are arranged inside the first heat exchanger 120, a first port 121 and a second port 122 are respectively arranged at two ends of the first heat exchanger 120 corresponding to the first coil 125, and a third port 123 and a fourth port 124 are respectively arranged at two ends of the first heat exchanger 120 corresponding to the second coil 126; the first port 121 communicates through the conduit first port 151; the second port 152 is communicated with the high-pressure air outlet 111 through a conduit; the second port 122 communicates with the low pressure suction port 112 through a duct; the third port 123 communicates with the second port 122 through a conduit; the fourth port 124 communicates with the third heat exchanger 140 through a conduit;
the second heat exchanger 130 is provided with a fifth port 131 and a sixth port 132; the fifth port 131 communicates with the fourth port 153 through a conduit; the sixth port 132 communicates with the third heat exchanger 140 through a conduit; throttle devices 160 are disposed between the fourth port 124 and the sixth port 132, and between the first port 151 and the second port 122;
the third heat exchanger 140 is provided with a seventh port 141 and an eighth port 142; a throttling device 160 is arranged between the sixth port 132 and the eighth port 142; the seventh port 141 communicates with the third port 153 through a conduit;
the throttling device 160 is provided with at least a first throttling device 161, a second throttling device 162 and a third throttling device 163; the first throttling means 161 is arranged between the second port 122 and the first port 151; a second flow restriction 162 is disposed between the third port 123 and the second port 122; the control mode switching of the air energy heat pump system is facilitated, and the working efficiency is improved;
the rectifying device 170 includes at least a first rectifying device 171, a second rectifying device 172, a third rectifying device 173, and a fourth rectifying device 174; the air-source heat pump system is convenient to use in cooperation with the throttling device 160, and the working efficiency of the air-source heat pump system is further improved.
The plurality of rectifying devices 170 are provided, and at least one rectifying device 170 is provided on each of a conduit connected to the eighth port 142 when the sixth port 132 cools, a conduit connected to the sixth port 132 when the eighth port 142 heats, and a conduit connected to the fourth port 124 and the eighth port 142 on a conduit connected to the fourth port 124 and the sixth port 132.
A three-way valve is arranged on a conduit connected with the second port 122; one port of the three-way valve is connected to the four-way selector valve 150 via a conduit, and the other port is connected to the third port 123 via a conduit.
The first port 151, the second port 152, the third port 153, and the fourth port 153 are used to be turned on and off according to the state of the heat pump system.
The vertical center lines of the first coil 125 and the second coil 126 are in the same vertical plane, and the first coil 125 is above the second coil 126; the use of the first coil 125 and the second coil 126 enables the temperature difference between the water temperatures of the respective places inside the water tank to be reduced in the case of stratification of the water temperature inside the water tank.
A control method of an air energy heat pump comprises a refrigeration and hot water supply control mode, a refrigeration control mode, a heating and hot water supply control mode, a heating control mode and a single-heat return water control mode; wherein,
the cooling while supplying hot water control mode includes: the first throttling device 161 is opened, the second throttling device 162 is closed, the first coil 125 works, the low-pressure air inlet port 112 sucks the evaporated low-temperature low-pressure gaseous refrigerant, the high-pressure air outlet port 112 discharges the compressed high-temperature high-pressure gaseous refrigerant into the conduit, the compressed high-temperature high-pressure gaseous refrigerant is guided into the first coil 125 through the first port 121, then is guided into the four-way reversing valve 150 through the first port 151, then flows into the seventh port 141 through the third port 153, and then flows out from the eighth port 142, the flowed-out high-temperature high-pressure liquid refrigerant flows into the second heat exchanger 130 through the third throttling device 163 and the third rectifying device 173, and then is guided into the low-pressure air inlet port 112 of the compressor 110 through the second heat exchanger 130, and the cycle is completed;
the cooling control mode includes: the second heat exchanger 120 corresponds to a condenser, the third heat exchanger 130 corresponds to an evaporator, the first throttling device 161 is opened, the second throttling device 162 is closed, the first coil 125 operates, the evaporated low-temperature low-pressure gaseous refrigerant is sucked from the low-pressure suction port 112 by the compressor 110, is compressed into a high-temperature high-pressure gaseous refrigerant by the compressor 110, then enters the first coil 125 from the high-pressure gas outlet 111 of the compressor 110 through the conduit via the first port 121 of the first heat exchanger 120, flows out through the second port 122, then passes through the first port 151 of the four-way reversing valve 150, and flows into the seventh port 141 of the third heat exchanger 140 via the third port 153 of the four-way reversing valve 150, the high-temperature high-pressure gaseous refrigerant heats the domestic water in the first coil 125, then is cooled to form a high-temperature high-pressure liquid refrigerant after exchanging heat with the cooling medium in the third heat exchanger 130, the refrigerant flows out from the second port 142 of the third heat exchanger 140, the flowing high-temperature and high-pressure liquid refrigerant flows through the second rectifying device 172, flows into the third rectifying device 163 after being rectified, is throttled to form a low-temperature and low-pressure gas-liquid mixed refrigerant, then the low-temperature and low-pressure gas-liquid mixed refrigerant flows in through the sixth port 132 of the second heat exchanger 130 after being rectified by the third rectifying device 173, is cooled by a cooling medium after exchanging heat with the cooled medium in the second heat exchanger 130, and supplies cold for a user, the refrigerant absorbs heat to form a low-temperature and low-pressure gaseous refrigerant, flows out from the fifth port 131 of the second heat exchanger 130, flows into the fourth port 154 of the four-way reversing valve 150, flows out from the second port 152 of the four-way reversing valve 150, and finally enters the low-pressure air inlet 112 of the compressor 110, and the cycle is repeated;
the heating simultaneous supply hot water control mode includes: the first throttling device 161 is closed, the second throttling device 162 is opened, the low-pressure air suction port 112 sucks the evaporated low-temperature low-pressure gaseous refrigerant, then the gaseous refrigerant flows through the first coil 125 and the second coil 126 and flows out through the fourth port 124, domestic water is heated in the first coil 125 and the second coil 126 to form high-temperature high-pressure liquid refrigerant, the flowing high-temperature high-pressure liquid refrigerant passes through the third throttling device 163 and the third rectifying device 173, is guided into the second heat exchanger 130, flows into the four-way reversing valve 150 through the fifth port 131, and then flows into the low-pressure air suction port 112 to complete the cycle;
the heating control mode includes: the second heat exchanger 120 corresponds to an evaporator, the third heat exchanger 130 corresponds to a condenser, the first throttling device 161 is opened, the second throttling device 162 is closed, the first coil 125 operates, the evaporated low-temperature low-pressure gaseous refrigerant is sucked from the low-pressure suction port 112 by the compressor 110, is compressed into a high-temperature high-pressure gaseous refrigerant by the compressor 110, then enters the first coil 125 from the high-pressure gas outlet 111 of the compressor 110 through a conduit via the first port 121 of the first heat exchanger 120, flows out through the second port 122, then flows in from the first port 151 of the four-way reversing valve 150, flows out from the fourth port 154 of the four-way reversing valve 150, flows into the second heat exchanger 130 through the fifth port 131 of the second heat exchanger 130, after the high-temperature high-pressure gaseous refrigerant exchanges heat with a cooling medium, is heated by the cooling medium, and heats a user, the high-temperature high-pressure gaseous refrigerant releases heat to form a high-temperature high-pressure gas-liquid mixed, the high-temperature and high-pressure gas-liquid mixed refrigerant flowing out of the sixth port 132 of the second heat exchanger 130 sequentially passes through the first rectifying device 171, the third rectifying device 163 and the fourth rectifying device 174 to form high-temperature and high-pressure liquid refrigerant, flows into the third heat exchanger 140 through the eighth port 142 of the third heat exchanger 140, exchanges heat with a cooling medium in the third heat exchanger 140 to form low-temperature and low-pressure liquid refrigerant, flows out of the fifth port 131, flows into the third port 153 of the four-way reversing valve 150, flows out of the second port 152 of the four-way reversing valve 150, and finally enters the low-pressure air suction port 112 of the compressor 110, and the cycle is repeated in this way;
the single hot water return control mode comprises the following steps: the second heat exchanger 120 does not work, the third heat exchanger 130 is equivalent to an evaporator, the first throttling device 161 is closed, the second throttling device 162 is opened, the first coil 125 and the second coil 126 of the first heat exchanger 120 work, the evaporated low-temperature and low-pressure gaseous refrigerant is sucked from the low-pressure suction port 112 by the compressor 110, is compressed into high-temperature and high-pressure gaseous refrigerant by the compressor 110, enters from the high-pressure air outlet 111 of the compressor 110 through a conduit pipe through the first port 121 of the first heat exchanger 120, sequentially enters the first coil 125 and the second coil 126, and flows out through the fourth port 124, the high-temperature and high-pressure gaseous refrigerant heats the domestic water in the first coil 125 and the second coil 126 of the first heat exchanger 120 to form high-temperature and high-pressure liquid refrigerant, and the flowing high-temperature and high-pressure liquid refrigerant sequentially passes through the third throttling device 163 and the fourth rectifying device 174, and flows into the third heat exchanger 140 through the eighth port 142 of the third heat exchanger 140, and after exchanging heat with the cooling medium inside the third heat exchanger 140, a low-temperature and low-pressure liquid refrigerant is formed and flows out from the fifth port 131, and the flowing-out low-temperature and low-pressure liquid refrigerant flows into the third port 153 of the four-way reversing valve 150, flows out from the second port 152 of the four-way reversing valve 150, and finally enters the high-pressure air outlet 111 of the compressor 110, and the cycle is repeated.
The cooling and hot water supply control mode is also used for switching the control modes, and comprises the following steps:
the refrigeration and hot water supply control mode is switched to the refrigeration control mode, the capacity of the compressor 110 is adjusted, the second throttling device 162 is opened after the T2 time is delayed, the first throttling device 161 is closed after the T3 time, and then the first throttling device 161 is closed after the T3 time is started after the T2 time, so that the cycle processing is carried out, and the oil return is guaranteed;
the cooling and hot water supply control mode is switched to the heating control mode, the four-way reversing valve 150 is switched, and then after the T2 time, the second throttling device 162 is opened for T3 time and then closed for periodic processing to ensure oil return;
and the control mode of supplying hot water at the same time of refrigeration is switched to a single hot water return control mode, the four-way reversing valve 150 is switched, the first throttling device 161 is opened after the time T2 is delayed, the second throttling device 162 is closed after the time T3, and the second throttling device 162 is closed after the time T3 is opened after the time T2 is passed, so that the cycle processing is carried out, and the oil return is ensured.
The cooling control mode includes the steps of:
the refrigeration control mode is switched to a refrigeration and hot water supply control mode, the four-way reversing valve 150 is switched, the first throttling device 161 is opened after the T2 time is delayed, the second throttling device 162 is closed after the T3 time, and then the second throttling device 162 is closed after the T3 time is started after the T2 time, so that the cycle processing is carried out, and the oil return is guaranteed;
the refrigeration control mode is switched to a heating control mode, a fan on the heat exchanger is started, after the time of T4 is delayed, the first throttling device 161 and the second throttling device 162 are opened, the time of T5 is delayed, the second throttling device 162 is closed, after the time of T6 is delayed again, the four-way reversing valve 150 is switched, after every T2 time, the second throttling device 162 is started for T3 time and then closed, periodic processing is carried out, and oil return is guaranteed;
the refrigeration control mode is switched to a single hot water return control mode, a fan on the heat exchanger is started, after the time delay of T7 is long, the first throttling device 161 is opened, after the time delay of T8 is long again, the second throttling device 162 is closed, after the time delay of T9 is long, the four-way reversing valve 150 is switched, after the time T10 is passed, the second throttling device 162 is opened, then the first throttling device 161 is closed, after the time T2 is passed, the first throttling device 161 is closed after the time T3 is opened, the periodic treatment is carried out, and oil return is guaranteed.
The heating control mode comprises the following steps:
the heating control mode is switched to a cooling and hot water supply control mode, the four-way reversing valve 150 is switched, and then after the T2 time, the second throttling device 162 is opened for T3 time and then closed for periodic processing to ensure oil return;
the heating control mode is switched to the refrigeration control mode, the four-way reversing valve 150 is switched, then the second throttling device 162 is opened, the first throttling device 161 is closed after the time delay of T11 is prolonged, and then the first throttling device 161 is closed after the time T3 is opened every time T2 is passed, so that the periodic treatment is carried out, and the oil return is ensured;
the heating control mode is switched to a single hot water return control mode, the second throttling device 162 is opened, the first throttling device 161 is closed after the time delay of T12 is long, and then after every T2 time, the first throttling device 161 is closed after the time of T3 is opened, periodic treatment is carried out, and oil return is guaranteed.
The single hot water return control mode comprises the following steps:
the single hot water return control mode is switched to a refrigeration and hot water supply control mode, the first throttling device 161 is opened, the time T13 is delayed, the first throttling device 162 is closed, then the four-way reversing valve 150 is switched, and after the T2 time, the second throttling device 162 is opened for T3 time and then closed for periodic processing to ensure oil return;
the single-heat backwater control mode is switched to the refrigeration control mode, the first throttling device 161 is opened, the second throttling device 162 is closed after the time T14 is delayed, then the four-way reversing valve 150 is switched, the second throttling device 162 is opened, the first throttling device 161 is closed, and after the time T2, the first throttling device 161 is closed after the time T3 is opened, the cycle processing is carried out, and the oil return is guaranteed;
and the single hot water return control mode is switched to the heating control mode, the second throttling device 162 is closed, and after the time T2 elapses, the second throttling device 162 is closed after the time T3 is opened, so that the periodic treatment is performed, and the oil return is ensured.
T2 to T14 each indicate a time interval that a user may wait for when using the air-to-heat pump system, and the time interval may be set according to the parameters of the compressor 110.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (10)
1. An air-source heat pump system is characterized by comprising a heat pump system, wherein the heat pump system comprises a compressor (110), a first heat exchanger (120), a second heat exchanger (130), a third heat exchanger (140), a four-way reversing valve (150), a rectifying device (170) and a throttling device (160); wherein,
a high-pressure air outlet (111) is formed in the compressor (110), and a low-pressure air suction port (112) is formed in the compressor (110) and is positioned below the high-pressure air outlet (111);
the four-way reversing valve (150) comprises a first interface (151), a second interface (152), a third interface (153) and a fourth interface (153);
a first coil (125) and a second coil (126) are arranged inside the first heat exchanger (120), a first port (121) and a second port (122) are respectively arranged at two ends of the first heat exchanger (120) corresponding to the first coil (125), and a third port (123) and a fourth port (124) are respectively arranged at two ends of the first heat exchanger (120) corresponding to the second coil (126); the first port (121) communicates through a conduit first interface (151); the second interface (152) is communicated with the high-pressure air outlet (111) through a conduit; the second port (122) communicates with the low pressure suction port (112) through a duct; the third port (123) communicates with the second port (122) through a conduit; the fourth port (124) is in communication with a third heat exchanger (140) via a conduit;
a fifth port (131) and a sixth port (132) are arranged on the second heat exchanger (130); the fifth port (131) is communicated with a fourth interface (153) through a conduit; the sixth port (132) is in communication with a third heat exchanger (140) via a conduit; throttling devices (160) are arranged between the fourth port (124) and the sixth port (132) and between the first interface (151) and the second port (122);
a seventh port (141) and an eighth port (142) are arranged on the third heat exchanger (140); a throttling device (160) is arranged between the sixth port (132) and the eighth port (142); the seventh port (141) communicates with a third port (153) through a conduit;
the throttling device (160) is at least provided with a first throttling device (161), a second throttling device (162) and a third throttling device (163); the first throttling device (161) is arranged between the second port (122) and the first interface (151); the second throttling device (162) is arranged between the third port (123) and the second port (122);
the rectifying means (170) comprise at least a first rectifying means (171), a second rectifying means (172), a third rectifying means (173) and a fourth rectifying means (174).
2. An air-to-energy heat pump system according to claim 1, wherein a plurality of said rectifying devices (170) are provided, and at least one rectifying device (170) is provided on a conduit connecting the sixth port (132) to the eighth port (142) for cooling, a conduit connecting the eighth port (142) to the sixth port (132) for heating, and a conduit connecting the fourth port (124) to the sixth port (132) to the fourth port (124) to the eighth port (142).
3. An air-source heat pump system according to claim 1, characterized in that the conduit to which the second port (122) is connected is provided with a three-way valve; one interface of the three-way valve is connected with the four-way reversing valve (150) through a conduit, and the other interface of the three-way valve is connected with the third port (123) through a conduit.
4. An air-energy heat pump system according to claim 1, characterized in that the first (151), second (152), third (153) and fourth (153) interfaces are adapted to be switched on and off depending on the state of the heat pump system.
5. An air-energy heat pump system according to claim 1, wherein the vertical centerlines of the first coil (125) and the second coil (126) are in the same vertical plane, and the first coil (125) is above the second coil (126).
6. An air-energy heat pump control method applied to the heat pump system according to any one of claims 1 to 5, wherein the control method includes a cooling simultaneous provision hot water control mode, a cooling control mode, a heating simultaneous provision hot water control mode, a heating control mode, and a single hot return water control mode; wherein,
the cooling while supplying hot water control mode includes: the first throttling device (161) is opened, the second throttling device (162) is closed, the first coil (125) works, the low-pressure air suction port (112) sucks evaporated low-temperature low-pressure gaseous refrigerant, the high-pressure air outlet (112) discharges the compressed high-temperature high-pressure gaseous refrigerant into a guide pipe, the compressed high-temperature high-pressure gaseous refrigerant is guided into the first coil (125) through the first port (121), then is guided into the four-way reversing valve (150) through the first port (151), then flows into the seventh port (141) through the third port (153), and then flows out from the eighth port (142), the flowing high-temperature high-pressure liquid refrigerant flows into the second heat exchanger (130) through the third throttling device (163) and the third rectifying device (173), and then is guided into the low-pressure air suction port (112) of the compressor (110) through the second heat exchanger (130), and circulation is completed;
the cooling control mode includes: the first throttling device (161) is opened, the second throttling device (162) is closed, the first coil (125) works, the low-pressure air suction port (112) sucks low-temperature and low-pressure gaseous refrigerant, the gaseous refrigerant compressed into high temperature and high pressure is guided into the first coil (125) through a guide pipe from the high-pressure air outlet (111), then flows into the four-way reversing valve (150) through the first interface (151), flows into the second heat exchanger (130) through the fourth interface 154 and flows out from the sixth port (132), flows into the third heat exchanger (140) through the sixth port (142) and the third rectifying device (173), flows into the third interface (153) through the seventh port (141), flows out through the second interface (152), and is guided into the low-pressure air suction port (112) of the compressor (110), and circulation is completed;
the heating simultaneous provision hot water control mode includes: the first throttling device (161) is closed, the second throttling device (162) is opened, the low-pressure air suction port (112) sucks the evaporated low-temperature and low-pressure gaseous refrigerant, then the gaseous refrigerant flows through the first coil (125) and the second coil (126) and flows out through the fourth port (124), domestic water is heated in the first coil (125) and the second coil (126) to form high-temperature and high-pressure liquid refrigerant, the flowing high-temperature and high-pressure liquid refrigerant passes through the third throttling device (163) and the third rectifying device (173), is guided into the second heat exchanger (130), flows into the four-way reversing valve (150) through the fifth port (131), and then flows into the low-pressure air suction port (112), and the circulation is completed;
the heating control mode comprises: the first throttling device (161) is opened, the second throttling device (162) is closed, the first coil (125) works, the low-pressure air suction port (112) sucks evaporated low-temperature and low-pressure gaseous refrigerant, the gaseous refrigerant is compressed by the compressor (110) and then is led into the first coil (125), then is led into the four-way reversing valve (150), and is led into the second heat exchanger (130) through the fourth interface 154, after heat exchange, the gaseous refrigerant is led into the third heat exchanger (140) through the first rectifying device (171), the third throttling device (163) and the fourth rectifying device (174), then is led into the four-way reversing valve (150) through the seventh port (141), and then is led into the low-pressure air suction port (112), and circulation is completed;
the single hot water return control mode comprises: the first throttling device (161) is closed, the second throttling device (162) is opened, the first coil (125) and the second coil (126) work, the low-pressure air suction port (112) sucks the evaporated low-temperature low-pressure gaseous refrigerant, the low-temperature low-pressure gaseous refrigerant flows through the first coil (125) and the second coil (126), the formed high-temperature high-pressure liquid refrigerant is led into the third heat exchanger (140) through the third throttling device (163) and the fourth rectifying device (174), and then is led into the low-pressure air suction port (112) through the four-way reversing valve (150), and the circulation is completed.
7. An air-source heat pump control method according to claim 6, wherein said cooling-while-supplying-hot-water control mode includes the steps of:
the refrigeration and hot water supply control mode is switched to a refrigeration control mode, the capacity of the compressor is adjusted, after T2 time is delayed, the second throttling device (162) is opened, after T3 time, the first throttling device (161) is closed, after T2 time, the first throttling device (161) is opened for T3 time and then closed, periodic processing is carried out, and oil return is guaranteed;
the refrigeration and hot water supply control mode is switched to the heating control mode, the four-way reversing valve (150) is switched, and then after the T2 time, the second throttling device (162) is opened for T3 time and then closed for periodic processing to ensure oil return;
and the control mode of supplying hot water during refrigeration is switched to a single hot water return control mode, the four-way reversing valve (150) is switched, after the time T2 is delayed, the first throttling device (161) is opened, after the time T3, the second throttling device (162) is closed, after the time T2, the second throttling device (162) is opened for the time T3 and then closed, periodic processing is carried out, and oil return is guaranteed.
8. An air-source heat pump control method according to claim 6, wherein said cooling control mode includes the steps of:
the refrigeration control mode is switched to a refrigeration and hot water supply control mode, a four-way reversing valve (150) is switched, after T2 time is delayed, a first throttling device (161) is opened, after T3 time, a second throttling device (162) is closed, after T2 time, the second throttling device (162) is opened for T3 time and then closed, periodic processing is carried out, and oil return is guaranteed;
the refrigeration control mode is switched to a heating control mode, a fan on the heat exchanger is started, after the time of T4 is delayed, the first throttling device (161) and the second throttling device (162) are opened, the time of T5 is delayed, the second throttling device (162) is closed, after the time of T6 is delayed again, the four-way reversing valve (150) is switched, after every T2 time, the second throttling device (162) is closed after the time of T3 is started, periodic processing is carried out, and oil return is guaranteed;
the refrigeration control mode is switched to a single hot backwater control mode, a fan on the heat exchanger is started, after the time delay of T7 is long, the first throttling device (161) is opened, the second throttling device (162) is closed after the time delay of T8 is long again, the four-way reversing valve (150) is switched after the time T9, after the time T10 is passed, the second throttling device (162) is opened, then the first throttling device (161) is closed, after the time T2 is passed, the first throttling device (161) is closed after the time T3 is opened, periodic treatment is carried out, and oil return is guaranteed.
9. An air-source heat pump control method according to claim 6, wherein said heating control mode includes the steps of:
the heating control mode is switched to a cooling and hot water supply control mode, the four-way reversing valve (150) is switched, and after T2 time, the second throttling device (162) is opened for T3 time and then closed for periodic processing to ensure oil return;
the heating control mode is switched to the refrigeration control mode, the four-way reversing valve (150) is switched, then the second throttling device (162) is opened, the first throttling device (161) is closed after the time of T11 is delayed, and then the first throttling device (161) is closed after the time of T3 is started every time T2 is passed, so that the periodic treatment is carried out, and the oil return is guaranteed;
the heating control mode is switched to a single hot water return control mode, the second throttling device (162) is opened, the first throttling device (161) is closed after the time of T12 is delayed, and then after the time of T2, the first throttling device (161) is closed after the time of T3 is started, periodic treatment is carried out, and oil return is guaranteed.
10. The air-source heat pump control method of claim 6, wherein the single hot water return control mode comprises the steps of:
the single hot water return control mode is switched to a refrigeration and hot water supply control mode, a first throttling device (161) is opened, the first throttling device (162) is closed after T13 time is delayed, then a four-way reversing valve (150) is switched, and after T2 time, a second throttling device (162) is closed after T3 time is started, periodic processing is carried out, and oil return is guaranteed;
the single-heat backwater control mode is switched to a refrigeration control mode, a first throttling device (161) is opened, after T14 time is delayed, a second throttling device (162) is closed, then a four-way reversing valve (150) is switched, then the second throttling device (162) is opened, then the first throttling device (161) is closed, and after T2 time, the first throttling device (161) is closed after T3 time is started, periodic treatment is carried out, and oil return is guaranteed;
and the single hot backwater control mode is switched to a heating control mode, the second throttling device (162) is closed, and after the time T2 elapses, the second throttling device (162) is closed after the time T3 is opened, and periodic treatment is carried out to ensure oil return.
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| WO2022017297A1 (en) * | 2020-07-24 | 2022-01-27 | 约克广州空调冷冻设备有限公司 | Heat pump system |
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