CN107514718B - Heat pump system, air conditioning system and control method thereof - Google Patents
Heat pump system, air conditioning system and control method thereof Download PDFInfo
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- CN107514718B CN107514718B CN201710728212.5A CN201710728212A CN107514718B CN 107514718 B CN107514718 B CN 107514718B CN 201710728212 A CN201710728212 A CN 201710728212A CN 107514718 B CN107514718 B CN 107514718B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
- F24F2005/0064—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy
Abstract
The application provides a heat pump system, an air conditioning system and a control method of the air conditioning system, wherein the heat pump system comprises a compressor, a first heat exchanger, a second heat exchanger and a solar heat collector which are arranged on a refrigerant flow path, a switching device is further arranged on the refrigerant flow path, the switching device is structured to enable the heat pump system to have a first communication mode and/or a second communication mode, the solar heat collector works independently in the first communication mode, and the solar heat collector and the compressor form a parallel flow path in the second communication mode. According to the application, the solar heat collector is arranged to collect the heat of sunlight to heat the refrigerant, and the solar heat is utilized to assist the operation of the air conditioner, so that the operation times of the compressor are reduced, the electric energy used by the air conditioner is saved, the service life of the compressor is greatly prolonged, and the operation of the air conditioner is more energy-saving and environment-friendly.
Description
Technical Field
The application relates to the technical field of air conditioning, in particular to a heat pump system, an air conditioning system provided with the heat pump system and a control method of the air conditioning system.
Background
The traditional air conditioner generally uses a compressor to compress a refrigerant to realize refrigeration and heating, and the compressor has high power consumption, so that the air conditioner has high use cost and can cause energy shortage, and particularly when the power consumption is high in summer, the high-power air conditioner can cause great load on a power grid, influence the stability of the power grid and even cause local area power shortage. And when the air conditioner is operated, the compressor is always in a working state, so that the abrasion of the compressor is accelerated in hot weather in summer, and the service life of an air conditioning system is influenced.
Disclosure of Invention
In view of the above, an object of the present application is to provide a heat pump system capable of delaying the service life of a compressor and further saving energy and protecting environment, an air conditioning system provided with the heat pump system, and a control method of the air conditioning system.
In order to achieve the above purpose, on one hand, the present application adopts the following technical scheme:
the heat pump system comprises a compressor, a first heat exchanger, a second heat exchanger and a solar heat collector, wherein the compressor, the first heat exchanger, the second heat exchanger and the solar heat collector are arranged on a refrigerant flow path, a switching device is further arranged on the refrigerant flow path, the switching device is configured to enable the heat pump system to have a first communication mode and/or a second communication mode, the solar heat collector works independently in the first communication mode, and the solar heat collector and the compressor form a parallel flow path in the second communication mode.
Preferably, the switching device is further configured such that the heat pump system has a third communication mode in which the solar collector and the compressor form a serial flow path.
Preferably, the solar heat collector further comprises a gas-liquid separator, wherein the output ends of the compressor and the solar heat collector are commonly connected to the first end of the first heat exchanger or the second heat exchanger, the second end of the second heat exchanger or the first heat exchanger is connected to the input end of the gas-liquid separator, and the gas output end of the gas-liquid separator is connected to the input ends of the compressor and the solar heat collector respectively.
Preferably, the solar heat collector further comprises a four-way reversing valve, wherein the output ends of the compressor and the solar heat collector are connected to a first port of the four-way reversing valve through a first flow path, a first end of the first heat exchanger is connected to a second port of the four-way reversing valve, a first end of the second heat exchanger is connected to a third port of the four-way reversing valve, and a fourth port of the four-way reversing valve is connected to an input end of the gas-liquid separator.
Preferably, the liquid output end of the gas-liquid separator is connected with the input end of the solar heat collector.
Preferably, the output end of the solar heat collector is provided with two branches, which are respectively: the first branch is connected with the output end of the solar heat collector and the first end of the first heat exchanger or the second heat exchanger, and the second branch is connected with the output end of the solar heat collector and the input end of the compressor.
Preferably, the switching device comprises a first control valve arranged on the first branch, and/or the switching device further comprises a second control valve arranged on the second branch, wherein the first control valve and the second control valve are used for controlling the on-off of the first branch and the second branch respectively.
Preferably, the switching device further comprises a third control valve disposed between the output end of the gas-liquid separator and the input end of the compressor, for controlling the input of the refrigerant from the gas-liquid separator to the compressor.
Preferably, the input end of the compressor is provided with a first input port, and the gas output end of the gas-liquid separator and the output end of the solar heat collector are both communicated with the compressor through the first input port; or the input end of the compressor is provided with two input ports, namely a first input port and a second input port, wherein the gas output end of the gas-liquid separator is connected with the first input port, and the output end of the solar heat collector is connected with the second input port.
Preferably, the second inlet is located at a lower or bottom portion of the compressor.
Preferably, a temperature sensor and/or a pressure sensor is provided on the solar collector.
On the other hand, the application adopts the following technical scheme:
an air conditioning system is provided with a controller, and the air conditioning system comprises the heat pump system.
In yet another aspect, the present application employs the following technical scheme:
the control method of the air conditioning system comprises the steps of judging the time required by the solar heat collector to heat the refrigerant to the specified state of the air conditioning system, judging the environment temperature condition according to the time required, and controlling the communication mode of the heat pump system and/or the operation mode of the air conditioning system according to the judged environment temperature condition.
Preferably, a first predetermined time T1 is set in the controller, and when the time required for the solar heat collector to heat the refrigerant to a system-specified state is less than the first predetermined time T1, the controller determines that the outdoor ambient temperature is high, and at this time, the refrigerant is heated only by the solar heat collector, and the compressor does not operate; and/or, the refrigerating capacity of the air conditioning system is improved.
Preferably, the controller controls to accelerate the frequency of detecting the pressure and/or temperature of the heat collecting plate of the solar collector when the controller judges that the outdoor ambient temperature is high.
Preferably, a second preset time T2 is set in the controller, when the time required for the solar heat collector to heat the refrigerant to a system specified state is greater than or equal to a first preset time T1 and less than the second preset time T2, the controller judges that the ambient temperature is not high according to the information fed back by the heat collecting plate, and at the moment, the controller controls the solar heat collector and the compressor to operate in parallel; and/or the controller controls the air conditioning system to reduce power, thereby reducing the cooling capacity.
Preferably, when the time required for the solar heat collector to heat the refrigerant to the system-specified state is equal to or longer than a second predetermined time T2, the controller judges that the outdoor ambient temperature is low, at this time,
the controller controls the solar heat collector and the compressor to operate in series; and/or the number of the groups of groups,
the controller controls the air conditioning system to further reduce power, thereby further reducing the cooling capacity.
According to the application, the solar heat collector is arranged to collect the heat of sunlight to heat the refrigerant, and the solar heat is utilized to assist the operation of the air conditioner, so that the problem that the traditional air conditioner simply relies on the compressor to compress the refrigerant in a single form is solved, the traditional air conditioner is well supplemented, meanwhile, the operation times of the compressor are reduced, the electric energy used by the air conditioner is saved, and the service life of the compressor is greatly prolonged; meanwhile, in the application, the heat information collected by the solar heat collector is fed back to the air conditioning system, so that the air conditioning system can adjust the operation mode according to the real-time environment temperature, and the air conditioning operation is more energy-saving and environment-friendly.
Drawings
The above and other objects, features and advantages of the present application will become more apparent from the following description of embodiments of the present application with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a heat pump system according to an embodiment of the present application;
fig. 2 shows a schematic diagram of a heat pump system according to a second embodiment of the present application.
Detailed Description
The present application is described below based on embodiments, and it will be understood by those of ordinary skill in the art that the drawings provided herein are for illustrative purposes and that the drawings are not necessarily drawn to scale.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".
As shown in fig. 1, the heat pump system provided by the application comprises a compressor 1, a four-way reversing valve 2, a first heat exchanger 3, a second heat exchanger 4, a gas-liquid separator 5 and a solar heat collector 6 which are arranged on a refrigerant flow path. Preferably, the solar heat collector 6 includes a solar heat collecting plate, on which a solar heat collecting pipe is disposed, and on which an input end and an output end, which are in communication with the solar heat collecting pipe, are disposed. The solar heat collector 6 can form a series or parallel flow path with the compressor 1, a switching device is arranged on a branch of the parallel flow path and used for controlling the communication or cut-off of the branch, and the switching device is configured to enable the heat pump system to have a first communication mode and/or a second communication mode, wherein the solar heat collector works independently in the first communication mode, and the solar heat collector and the compressor form a parallel flow path in the second communication mode. Preferably, the switching device is further configured such that the heat pump system has a third communication mode in which the solar collector and the compressor form a serial flow path.
Embodiment one:
specifically, the output ends of the compressor 1 and the solar heat collector 6 are commonly connected to a first port 21 of the four-way reversing valve 2 through a first flow path 10, one end of the first heat exchanger 3 is connected to a second port 22 of the four-way reversing valve 2, one end of the second heat exchanger 4 is connected to a third port 23 of the four-way reversing valve 2, and a fourth port 24 of the four-way reversing valve 2 is connected to an input end of the gas-liquid separator 5. The compressor 1 and the solar heat collector 6 are arranged between the gas-liquid separator 5 and the first port 21 of the four-way reversing valve 2, the compressor 1 and the solar heat collector 6 can both provide high-temperature and high-pressure gaseous refrigerants for the first heat exchanger 3 or the second heat exchanger 4, and when the heat pump system is used, the working states of the compressor 1 and the solar heat collector 6 can be controlled according to actual conditions, for example, the solar heat collector 6 can work independently, the compressor 1 does not work, and the solar heat collector 6 can heat and pressurize the refrigerants independently; or the solar heat collector 6 and the compressor 1 are operated in parallel, and the refrigerant is heated and pressurized by the two; or the solar heat collector 6 and the compressor 1 are in series operation, the solar heat collector 6 preheats the refrigerant, the preheated gaseous refrigerant is input into the compressor for further treatment, and under the condition, the preheated refrigerant can enter the compressor from the bottom of the compressor 1, so that heat collected by the solar heat collector 6 can be transferred to the lubricating oil in the compressor 1 at first, the lubricating oil can be heated, and the compressor is prevented from being blocked due to solidification of the lubricating oil. At this time, the heat in the preheated refrigerant can play the role of an electric heating belt in the compressor, the electric heating belt in the compressor can not need to input electric energy, solar energy can be effectively utilized, and resources are saved. The specific operation control of the solar collector 6 and the compressor 1 can enable the operation of the heat pump system to be in real time connection with the environmental conditions, and resources can be effectively saved (the specific control aspect is described in detail later).
Preferably, the input end of the compressor 1 is provided with two input ports, namely a first input port 11 and a second input port 12, wherein the first input port is connected with the gas output end of the gas-liquid separator 5, and is used for inputting the gaseous refrigerant separated by the gas-liquid separator 5 into the compressor 1 for treatment. The gas output end of the gas-liquid separator 5 is also connected with the input end of the solar heat collector 6, and is used for inputting the gaseous refrigerant separated by the gas-liquid separator 5 into the solar heat collector 6 for treatment. Preferably, a pump 51 is arranged on the line between the gas-liquid separator 5 and the solar collector 6, which pump 51 is arranged to speed up the transport from the gas-liquid separator 5 to the solar collector 6. In another preferred embodiment, the input end of the solar heat collector 6 is also connected to the liquid output end (not shown in the figure) of the gas-liquid separator 5, so as to input the liquid refrigerant in the gas-liquid separator 5 into the solar heat collector 6 for heating and pressurizing. Preferably, the second input port 12 is located at the lower part or bottom of the compressor, so that the refrigerant preheated from the solar heat collector 6 can enter the compressor from the lower part or bottom of the compressor 1, thereby heating the lubricant oil located at the bottom of the compressor. In a preferred embodiment, the output end of the solar collector 6 is provided with two branches, respectively: the first branch 61 connecting the output of the solar collector 6 and the first flow path 10, and the second branch 62 connecting the output of the solar collector 6 and the second input 12 of the compressor 1 are used for inputting the gaseous refrigerant heated by the solar collector 6 into the first heat exchanger 3/the second heat exchanger 4 or the compressor 1, respectively. Preferably, a first control valve 611 is disposed on the first branch 61, and a second control valve 621 is disposed on the second branch 62, where the first control valve 611 and the second control valve 621 are preferably electromagnetic valves for controlling on-off of the first branch 61 and the second branch 62, respectively. In order to control the input of the refrigerant from the gas-liquid separator 5 to the compressor 1, a third control valve 13 is provided on a branch between the output end of the gas-liquid separator 5 and the input end of the compressor 1, and the third control valve 13 is preferably an electromagnetic valve for controlling the on-off of the output of the compressor 1.
Furthermore, the application also provides an air conditioning system, which is provided with the heat pump system, and can fully utilize solar energy in the nature, judge the environment temperature condition according to the solar energy conversion condition, automatically control the air conditioning system in real time and effectively avoid resource waste. Preferably, a controller (not shown) is provided in the air conditioning system for controlling the operation of the air conditioning system.
In a preferred embodiment, a temperature sensor and a pressure sensor (not shown) are provided on the air conditioning system for sensing the temperature and pressure of the refrigerant in the solar heat collector 6, respectively, and the controller collects the sensed results of the temperature sensor and the pressure sensor for controlling the operation of the air conditioning system.
Further, the application also provides a control method of the air conditioning system, which comprises the steps of judging the time required by the solar heat collector 6 to heat the refrigerant to the system regulated state, judging the environment temperature condition according to the required time, further controlling the opening and closing of each flow path and branch in the heat pump system to control the operation of the heat pump system, and simultaneously controlling the operation of the air conditioning system according to the judged environment temperature condition.
Specifically, in a preferred embodiment, a first predetermined time T1 is set in the controller, for example, the first predetermined time is 0.5-3 minutes, preferably 1 minute, when the time required for the solar heat collector 6 to heat the refrigerant to the system specified state is less than the first predetermined time T1, the controller determines that the outdoor environment temperature is high and the sunlight is sufficient according to the information fed back by the solar heat collector 6, the heat collecting plate of the solar heat collector 6 collects more heat, at this time, the controller determines that the system requirement can be met only by using the solar heat collector 6 to heat the refrigerant, then the controller controls the first control valve 611 to open, controls the second control valve 621 and the third control valve 13 to close, the compressor 1 stops, and the gaseous refrigerant output from the output end of the solar heat collector 6 flows into the first heat exchanger 3 or the second heat exchanger 4 through the first branch 61 and the first flow path 10 to perform heat exchange (determining whether to enter the first heat exchanger 3 or first enter the second heat exchanger 4 according to the specific state of the four-way reversing valve 2), which is not repeated in the prior art; meanwhile, the air conditioning system controls the running mode of the air conditioning system according to the feedback information, specifically, if the temperature of the environment is high in the feedback condition, the output power is increased, for example, the running power of a fan is increased, so that the refrigerating capacity is increased to meet the indoor user demand, and the circulation speed of the refrigerant on the heat collecting plate of the solar heat collector 6 is increased by increasing the power of the pump 51, and the refrigerant output is increased. Meanwhile, as the environment temperature is higher, the air conditioning system is safe for protecting the system, the controller can control and quicken the frequency of detecting the pressure and the temperature of the heat collecting plate of the solar heat collector 6, and when the pressure is too high, the air conditioning system controls the unfolding angle of the sun shield on the heat collecting plate, reduces the heat absorption and ensures the stable and reliable operation of the air conditioning system.
A second predetermined time T2 is set in the controller, which second predetermined time T2 is greater than the first predetermined time T1, for example chosen to be 4-6 minutes, preferably 5 minutes. When the time required for the heat collecting plate to heat the refrigerant to the system regulated state is greater than or equal to the first preset time T1 and less than the second preset time T2, the controller judges that the sunlight is insufficient or the ambient temperature is not high according to the information fed back by the heat collecting plate, the controller only can control the compressor 1 to be opened according to the heat collecting plate feedback information, and controls the first control valve 611 and the third control valve 13 to be opened, the second control valve 621 is closed, so that the first branch 61 is opened, the second branch 62 is closed, the refrigerant output from the gas output end of the gas-liquid separator 5 respectively enters the solar heat collector 6 and the compressor 1, the heat collecting plate of the solar heat collector 6 and the compressor 1 are in parallel operation, and the common transmission refrigerant meets the system requirement. At this time, the controller controls the air conditioning system to reduce power, that is, the air conditioning unit is operated in a down-conversion mode, and the operating frequency of the compressor is reduced, so that the unit power is reduced.
When the time required for the heat collecting plate to heat the refrigerant to the system specified state is more than or equal to the second preset time, the heat collecting plate collects heat to heat the refrigerant slowly, and the controller judges that the outdoor environment temperature is low and the sunlight is insufficient according to the information fed back by the solar heat collector 6. Therefore, it is determined that the heat collecting plate of the solar heat collector 6 cannot heat the refrigerant to the system specified state, at this time, the second control valve 621 is controlled to be opened, and the first control valve 611 and the third control valve 13 are controlled to be closed, so that the solar heat collector 6 and the compressor 1 operate in series, and the refrigerant heated by the solar heat collector 6 enters the compressor 1 through the second branch 62 to continue to be processed, and the solar heat collector 6 is mainly used for preheating the refrigerant. The refrigerant processed by the solar heat collector 6 enters the compressor from the bottom of the compressor 1 through the second input port 12 of the compressor 1, so that heat collected by the solar heat collector 6 can be transferred to lubricating oil in the compressor 1, the effect of an electric heating belt of the compressor can be achieved, the problem of resource waste caused by heating of the electric heating belt can be solved, and the compressor is prevented from being blocked due to solidification of the oil. Meanwhile, the controller can control the system output according to the information fed back by the heat collecting plate of the solar heat collector 6 in real time, correspondingly reduce power, reduce refrigerating capacity and the like, and ensure the system operation to save energy.
Embodiment two:
most of this embodiment is the same as the first embodiment, and the same parts are not repeated, and the following description will mainly explain the parts different from the first embodiment.
In this embodiment, as shown in fig. 2, only one first input port 11 is provided in the compressor 1, and the second branch 62 is in communication with the first input port 11, so that the refrigerant output from the solar heat collector 6 enters the compressor 1 through the first input port 11 for further processing.
The heat pump system and the air conditioning system can fully utilize the heat collecting plate of the solar heat collector to collect heat of the sun and surrounding environment, heat the refrigerant in an auxiliary way, heat the refrigerant into high-temperature and high-pressure gas, when the pressure sensor and the temperature sensor in the heat collecting plate detect that the pressure and the temperature of the refrigerant reach the set values of the system, the control valve, such as an electromagnetic valve, is controlled to open the valve of the heat collecting plate, the high-temperature and high-pressure refrigerant is transmitted to the heat exchanger for heat exchange, and meanwhile, the gas-liquid separator pumps the separated gaseous refrigerant back into the heat collecting plate through the pump 51, so that the air conditioner is used for refrigerating and heating; if the environmental heat is insufficient, the heat collecting plate of the solar heat collector heats the refrigerant as a preheated refrigerant and then transmits the preheated refrigerant to the compressor for compression, so that the output of the compressor is reduced; and simultaneously, the collected heat information is fed back to the air conditioning system, and the air conditioning operation mode is controlled to realize energy-saving operation.
It is easy to understand by those skilled in the art that the above preferred embodiments can be freely combined and overlapped without conflict.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (14)
1. The heat pump system is characterized by comprising a compressor, a first heat exchanger, a second heat exchanger and a solar heat collector which are arranged on a refrigerant flow path, wherein a switch device is further arranged on the refrigerant flow path, the switch device is configured to enable the heat pump system to have a first communication mode and/or a second communication mode, the solar heat collector works independently in the first communication mode, and the solar heat collector and the compressor form a parallel flow path in the second communication mode;
the solar heat collector also comprises a gas-liquid separator, wherein the liquid output end of the gas-liquid separator is connected with the input end of the solar heat collector;
the input end of the compressor is provided with two input ports, namely a first input port and a second input port, wherein the gas output end of the gas-liquid separator is connected with the first input port, and the output end of the solar heat collector is connected with the second input port; the second input port is positioned at the lower part or the bottom of the compressor;
the gas-liquid separator is used for inputting the gaseous refrigerant separated by the gas-liquid separator into the solar heat collector for treatment.
2. The heat pump system of claim 1, wherein the switching device is further configured such that the heat pump system has a third communication mode in which the solar collector and the compressor form a serial flow path.
3. The heat pump system of claim 2, wherein the output of the compressor and the solar collector are commonly connected to a first end of the first heat exchanger or a second heat exchanger, a second end of the second heat exchanger or the first heat exchanger is connected to an input of the gas-liquid separator, and a gas output of the gas-liquid separator is connected to the input of the compressor and the solar collector, respectively.
4. The heat pump system of claim 3, further comprising a four-way reversing valve, wherein the output of the compressor and the solar collector are connected to a first port of the four-way reversing valve via a first flow path, wherein a first end of the first heat exchanger is connected to a second port of the four-way reversing valve, wherein a first end of the second heat exchanger is connected to a third port of the four-way reversing valve, and wherein a fourth port of the four-way reversing valve is connected to an input of the gas-liquid separator.
5. A heat pump system according to claim 3, wherein the output end of the solar collector is provided with two branches, respectively: the first branch is connected with the output end of the solar heat collector and the first end of the first heat exchanger or the second heat exchanger, and the second branch is connected with the output end of the solar heat collector and the input end of the compressor.
6. The heat pump system of claim 5, wherein the switching device comprises a first control valve disposed on the first branch, and/or the switching device further comprises a second control valve disposed on the second branch, the first and second control valves being configured to control the on-off of the first and second branches, respectively.
7. The heat pump system of claim 6, wherein the switching device further comprises a third control valve disposed between an output of the gas-liquid separator and an input of the compressor for controlling the input of refrigerant from the gas-liquid separator to the compressor.
8. Heat pump system according to one of claims 1-7, characterized in that a temperature sensor and/or a pressure sensor is provided on the solar collector.
9. An air conditioning system having a controller disposed therein, characterized in that the air conditioning system comprises the heat pump system of one of claims 1 to 7.
10. A control method of an air conditioning system according to claim 9, characterized in that the control method includes the steps of judging a time required for the solar heat collector to heat a refrigerant to a prescribed state of the air conditioning system, judging an ambient temperature condition based on the time required, and controlling a communication mode of the heat pump system and/or an operation mode of the air conditioning system based on the judged ambient temperature condition.
11. The control method according to claim 10, characterized in that,
a first preset time T1 is set in the controller, when the time required by the solar heat collector to heat the refrigerant to a system specified state is less than the first preset time T1, the controller judges that the outdoor environment temperature is high,
at this time, the controller controls the refrigerant to be heated only through the solar heat collector, and the compressor does not work; and/or the number of the groups of groups,
the controller controls to increase the refrigerating capacity of the air conditioning system.
12. The control method according to claim 11, wherein the controller controls to speed up the frequency of detecting the pressure and/or temperature of the heat collecting plate of the solar collector when the controller judges that the outdoor ambient temperature is high.
13. The control method according to claim 11, characterized in that,
a second preset time T2 is set in the controller, when the time required by the solar heat collector to heat the refrigerant to a system specified state is more than or equal to the first preset time T1 and less than the second preset time T2, the controller judges that the ambient temperature is not high according to the feedback information of the heat collecting plate, at the moment,
the controller controls the solar heat collector and the compressor to run in parallel; and/or the number of the groups of groups,
the controller controls the air conditioning system to reduce power, thereby reducing the cooling capacity.
14. The control method according to claim 13, characterized in that,
when the time required for the solar heat collector to heat the refrigerant to the system specified state is more than or equal to the second preset time T2, the controller judges that the outdoor environment temperature is low, at the moment,
the controller controls the solar heat collector and the compressor to operate in series; and/or the number of the groups of groups,
the controller controls the air conditioning system to further reduce power, thereby further reducing the cooling capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710728212.5A CN107514718B (en) | 2017-08-23 | 2017-08-23 | Heat pump system, air conditioning system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710728212.5A CN107514718B (en) | 2017-08-23 | 2017-08-23 | Heat pump system, air conditioning system and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107514718A CN107514718A (en) | 2017-12-26 |
| CN107514718B true CN107514718B (en) | 2023-08-11 |
Family
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| CN107514718A (en) | 2017-12-26 |
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