CN218120240U - Heat pump system - Google Patents
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- CN218120240U CN218120240U CN202222427170.0U CN202222427170U CN218120240U CN 218120240 U CN218120240 U CN 218120240U CN 202222427170 U CN202222427170 U CN 202222427170U CN 218120240 U CN218120240 U CN 218120240U
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Abstract
The application relates to the technical field of heat pumps, and provides a heat pump system which comprises a heat pump module and a heat storage module. The heat pump module comprises a refrigerant circulating pipeline, and a compressor, a reversing valve, a first heat exchanger, a first throttling device and a second heat exchanger which are sequentially arranged on the refrigerant circulating pipeline. The heat storage module comprises a refrigerant heat storage pipeline, a heat accumulator and a second throttling device which are sequentially arranged on the refrigerant heat storage pipeline; the first end of the refrigerant heat storage pipeline is connected between the reversing valve and the first heat exchanger, and the second end of the refrigerant heat storage pipeline is connected between the first throttling device and the second heat exchanger. The application provides a heat pump system, on the one hand the refrigerant of heat pump system refrigerant circulation pipeline can flow into in the refrigerant heat accumulation pipeline and carry out the heat exchange with the heat accumulator to utilize the heat accumulation module to get up unnecessary heat storage, avoid the frequent start-stop of heat pump system. On the other hand, the heat storage module can also be used for reverse defrosting, the defrosting efficiency is improved, and the water temperature fluctuation of a user side is reduced.
Description
Technical Field
The application relates to the technical field of heat pumps and provides a heat pump system.
Background
A heat pump is a device that transfers heat energy from a low-temperature heat source to a high-temperature heat source to perform cooling and heating. In the operation process of an existing heat pump system, for example, a cold water system of an air source heat pump system, when the return water temperature reaches a set temperature, the heat pump system stops operating, and a user easily causes frequent start and stop of a heat pump unit under the condition of low heating demand, and frequent start and stop not only causes large energy consumption of the heat pump unit, but also seriously affects the service life of the heat pump unit.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present application provides a heat pump system capable of avoiding frequent start and stop of the heat pump system.
An embodiment of the present application provides a heat pump system, including:
the heat pump module comprises a refrigerant circulating pipeline, and a compressor, a reversing valve, a first heat exchanger, a first throttling device and a second heat exchanger which are sequentially arranged on the refrigerant circulating pipeline;
the heat storage module comprises a refrigerant heat storage pipeline, and a heat accumulator and a second throttling device which are sequentially arranged on the refrigerant heat storage pipeline; the first end of the refrigerant heat accumulation pipeline is connected between the reversing valve and the first heat exchanger, and the second end of the refrigerant heat accumulation pipeline is connected between the first throttling device and the second heat exchanger.
In some embodiments, the heat storage module includes a first switch valve disposed on the refrigerant heat storage pipeline, and the first switch valve is located between the reversing valve and the heat accumulator.
In some embodiments, the heat pump system has a single heating mode in which the first on-off valve is closed, the first throttling device is opened, the second throttling device is closed, and the suction port of the compressor and the discharge port of the compressor communicate with the second heat exchanger and the first heat exchanger, respectively, through the reversing valve.
In some embodiments, the heat pump system has a single cooling mode in which the first on-off valve is closed, the first throttling device is opened, the second throttling device is closed, and the suction port of the compressor and the discharge port of the compressor communicate with the first heat exchanger and the second heat exchanger, respectively, through the reversing valve.
In some embodiments, the heat pump system has a heat storage heating mode in which both the first throttling device and the second throttling device are opened, and the suction port of the compressor and the discharge port of the compressor communicate with the second heat exchanger and the first heat exchanger, respectively, through the reversing valve.
In some embodiments, the heat pump system has a defrost mode in which both the first and second throttle devices are open, and the suction port of the compressor and the discharge port of the compressor communicate with the first and second heat exchangers, respectively, through the reversing valve.
In some embodiments, the heat pump system includes a heat recovery line and a three-way valve; the three-way valve comprises a first valve port, a second valve port and a third valve port, the first valve port is communicated with the reversing valve, the second valve port is communicated with the second heat exchanger, the first end of the heat recovery pipeline is communicated with the third valve port, and the second end of the heat recovery pipeline is connected between the first switch valve and the heat accumulator.
In some embodiments, the heat pump system has a heat recovery cooling mode, in which the first on-off valve is closed, the first throttling device and the second throttling device are both opened, the first valve port and the third valve port are communicated, the first valve port and the second valve port are closed, and the suction port of the compressor and the exhaust port of the compressor are communicated with the first heat exchanger and the first valve port through the reversing valve, respectively.
In some embodiments, the heat pump system includes a refrigerant branch and a second switch valve located on the refrigerant branch, a first end of the refrigerant branch is connected to a pipeline between the heat accumulator and the second throttling device, and a second end of the refrigerant branch is connected between the second heat exchanger and the three-way valve.
In some embodiments, the heat pump system has a cooling heat recovery cooling mode, in the cooling heat recovery cooling mode, the first switch valve and the second throttle device are both closed, the second switch valve and the first throttle device are both open, the first valve port and the third valve port are on, the first valve port and the second valve port are off, and the suction port of the compressor and the exhaust port of the compressor are respectively communicated with the first heat exchanger and the first valve port through the reversing valve.
According to the heat pump system provided by the embodiment of the application, on one hand, under the condition that the heating or heat supply demand of a user is low, the refrigerant of the refrigerant circulating pipeline can flow into the refrigerant heat storage pipeline and exchange heat with the heat accumulator, so that the redundant heat is stored by the heat storage module, and the frequent start and stop of the heat pump system are avoided. On the other hand, the heat stored by the heat storage module can be used for realizing reverse defrosting for the second heat exchanger, so that the defrosting efficiency is improved, and the water temperature fluctuation of a user side is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a heat pump system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of the operation of the individual heating mode of the configuration of FIG. 1;
FIG. 3 is a schematic diagram of the operation of the isolation cooling mode of the configuration of FIG. 1;
fig. 4 is an operation schematic diagram of a heat accumulation heating mode of the structure shown in fig. 1;
FIG. 5 is a schematic diagram of the defrost mode operation of the configuration of FIG. 1;
FIG. 6 is a schematic diagram of the operation of the heat recovery refrigeration mode of the configuration of FIG. 1;
fig. 7 is a schematic diagram of the operation of the heat rejection heat recovery cooling mode of the configuration shown in fig. 1.
Description of the reference numerals
A heat pump module 1; a refrigerant circulation line 11; a compressor 12; a direction change valve 13; a first interface 131; a second interface 132; a third interface 133; a fourth interface 134; a first heat exchanger 14; a first throttle device 15; a second heat exchanger 16; a heat storage module 2; a refrigerant heat storage pipe 21; a heat accumulator 22; a second throttle device 23; a first on-off valve 24; a heat recovery line 3; a three-way valve 4; the first valve port 41; a second valve port 42; a third port 43; a refrigerant branch 5; a second on-off valve 6; a water return port a.
Detailed Description
It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.
In the description of the embodiments of the present application, the term "first/second" merely distinguishes different objects and does not mean that there is the same or a relation between the two. It is to be understood that such directional terms are merely for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application.
Referring to fig. 1, an embodiment of the present application provides a heat pump system, which includes a heat pump module 1 and a heat storage module 2.
The heat pump module 1 includes a refrigerant circulation pipeline 11, and a compressor 12, a reversing valve 13, a first heat exchanger 14, a first throttling device 15, and a second heat exchanger 16 that are sequentially disposed on the refrigerant circulation pipeline 11. Specifically, the first heat exchanger 14 and the second heat exchanger 16 can be used for heat exchange with other media such as air or water, which can be used for good heat exchange effect. Illustratively, the first heat exchanger 14 is adapted to exchange heat with water and the second heat exchanger 16 is adapted to exchange heat with air. The refrigerant circulation line 11 is for circulating a refrigerant. The compressor 12 serves to compress a low-pressure gaseous refrigerant into a high-pressure gaseous refrigerant. The direction change valve 13 switches the flow direction of the refrigerant in the refrigerant circulation line 11.
In an exemplary embodiment, the reversing valve 13 is a four-way valve. The direction change valve 13 includes a first port 131, a second port 132, a third port 133 and a fourth port 134, the first port 131 is communicated with a suction port of the compressor 12, the second port 132 is communicated with an exhaust port of the compressor 12, the third port 133 is communicated with a refrigerant port of the first heat exchanger 14, and the fourth port 134 is communicated with a refrigerant port of the second heat exchanger 16.
The heat storage module 2 comprises a refrigerant heat storage pipeline 21, and a heat accumulator 22 and a second throttling device 23 which are sequentially arranged on the refrigerant heat storage pipeline 21; a first end of the refrigerant heat accumulation pipe line 21 is connected between the selector valve 13 and the first heat exchanger 14, and a second end of the refrigerant heat accumulation pipe line 21 is connected between the first throttle device 15 and the second heat exchanger 16. Specifically, the first throttling device 15 and the second throttling device 23 are used for throttling and depressurizing the high-pressure liquid refrigerant into low-pressure liquid refrigerant.
That is, in the present invention, one refrigerant heat accumulation pipeline 21 is connected in parallel to the refrigerant circulation pipeline 11, and the refrigerant can flow into the refrigerant heat accumulation pipeline 21 from the refrigerant circulation pipeline 11 so that the refrigerant can exchange heat with the accumulator 22.
According to the heat pump system provided by the application, on one hand, under the condition that the heating or heat supply demand of a user is low, the refrigerant of the refrigerant circulating pipeline 11 can flow into the refrigerant heat storage pipeline 21 and exchange heat with the heat accumulator 22, so that redundant heat is stored by the heat storage module 2, and frequent starting and stopping of the heat pump system are avoided. On the other hand, the heat stored in the heat storage module 2 can be used for defrosting the second heat exchanger 16 in the reverse direction, so that the defrosting efficiency is improved, and the water temperature fluctuation on the user side is reduced.
The application range of the heat pump system of the present application includes, but is not limited to, offices, hospitals, schools, homes, and other living or industrial scenes requiring heating, cooling, or hot water supply.
It should be noted that the user side is located at the first heat exchanger 14, and the user side is provided with a circulating water path, and the circulating water path can exchange heat with the first heat exchanger 14. The circulating water path includes, but is not limited to, a water path for heating such as a floor heating system.
The first and second heat exchangers 14, 16 include, but are not limited to, floating head heat exchangers, fixed tube and plate heat exchangers, U-tube and plate heat exchangers, and the like.
The compressor 12 includes, but is not limited to, a piston compressor 12, a screw compressor 12, a scroll compressor 12, a rolling rotor compressor 12, a centrifugal compressor 12, an axial compressor 12, and the like.
The refrigerant includes, but is not limited to, chlorofluorocarbons, hydrochlorofluorocarbons, hydrofluorocarbons, and like chlorofluorocarbons.
The first throttling means 15 and the second throttling means 23 include, but are not limited to, a capillary tube capable of bi-directional flow, an electronic expansion valve, a throttling nipple, and the like.
The regenerator 22 may be any material having energy storage properties. Illustratively, in one embodiment, the heat storage material of the regenerator 22 is a solid-liquid phase change heat storage material that stores heat by a melting process and releases heat by a solidification process of a phase change material, including but not limited to a combination of crystallized water and salt, molten salt, metal, or alloy.
In one embodiment, the phase change temperature range of the phase change heat storage material is 35-45 ℃.
In one embodiment, referring to fig. 1, the heat storage module 2 includes a first on-off valve 24 disposed on the refrigerant heat storage pipeline 21, and the first on-off valve 24 is located between the reversing valve 13 and the heat accumulator 22. The first on-off valve 24 controls the flow state of the refrigerant in the refrigerant heat accumulation circuit 21. When the first on-off valve 24 is in the closed state, the refrigerant in the refrigerant circulation line 11 cannot flow into the refrigerant heat storage line 21; when the first on-off valve 24 is in the open state, the refrigerant in the refrigerant circulation line 11 can flow into the refrigerant heat storage line 21.
In an exemplary embodiment, referring to fig. 4, the heat pump system has a heat storage and heating mode in which the first throttling device 15 and the second throttling device 23 are both opened, and the suction port and the discharge port of the compressor 12 communicate with the second heat exchanger 16 and the first heat exchanger 14, respectively, through the reversing valve 13. Specifically, the second port 132 and the third port 133 of the direction valve 13 are conductive, the first port 131 and the fourth port 134 of the direction valve 13 are conductive, and the first switching valve 24 is in the open state.
In the heat storage and heating mode, the high-temperature and high-pressure gaseous refrigerant firstly enters the second interface 132 of the reversing valve 13 through the exhaust port of the compressor 12, then flows out of the third interface 133 of the reversing valve 13 and is divided into two paths, wherein one path of gaseous refrigerant flows into the first heat exchanger 14 and is condensed and released in the first heat exchanger 14 to improve the water temperature of a user side, and the condensed low-temperature and high-pressure liquid refrigerant is throttled and depressurized by the first throttling device 15 to become a low-temperature and low-pressure liquid refrigerant; the other path of gaseous refrigerant flows into the heat accumulator 22 along the refrigerant heat storage pipeline 21 to be condensed and release heat and stores the heat into the heat accumulator 22, and the condensed low-temperature high-pressure liquid refrigerant is throttled and depressurized by the second throttling device 23 to become a low-temperature low-pressure liquid refrigerant; then, the two low-temperature low-pressure liquid refrigerants are merged into the second heat exchanger 16 to be evaporated and absorb heat to become a high-temperature low-pressure gas refrigerant, the high-temperature low-pressure gas refrigerant flows into the fourth interface 134 of the reversing valve 13, and then flows out of the first interface 131 of the reversing valve 13 to enter the air suction port of the compressor 12, so that a heating and heat storage cycle is completed.
So arranged, the heat stored in the heat accumulator 22 can be released for use by a user through heat exchange with other media. For example, a hot water replacement pipe is arranged in the heat accumulator 22, heat stored in the heat accumulator 22 exchanges heat with water in the hot water replacement pipe, and heated hot water can be delivered to a user.
In one embodiment, referring to fig. 5, the heat pump system has a defrost mode in which the first throttle device 15 and the second throttle device 23 are both open, and the suction port and the discharge port of the compressor 12 are connected to the first heat exchanger 14 and the second heat exchanger 16 through the reversing valve 13, respectively. Specifically, the second port 132 and the fourth port 134 of the direction valve 13 are conductive, the first port 131 and the third port 133 of the direction valve 13 are conductive, and the first switching valve 24 is in the open state.
When the heat pump system needs to defrost the second heat exchanger 16, the heat pump system enters a defrosting mode, in the defrosting mode, a high-temperature high-pressure gaseous refrigerant firstly enters the second interface 132 of the reversing valve 13 through the exhaust port of the compressor 12, then flows into the second heat exchanger 16 from the fourth interface 134 of the reversing valve 13 and condenses and releases heat in the second heat exchanger 16 to melt a frost layer on the surface of the second heat exchanger 16, the condensed low-temperature high-pressure liquid refrigerant is divided into two paths, wherein one path firstly flows into the first throttling device 15 along the refrigerant circulating pipeline 11 to be throttled and depressurized to be changed into a low-temperature low-pressure liquid refrigerant, and then enters the first heat exchanger 14 to be evaporated and absorb heat to be changed into a high-temperature low-pressure gaseous refrigerant; the other path of refrigerant flows into the second throttling device 23 along the refrigerant heat storage pipeline 21 to be throttled and decompressed into low-temperature and low-pressure liquid refrigerant, and then enters the heat accumulator 22 to be evaporated and absorbed to be changed into high-temperature and low-pressure gaseous refrigerant; then, the two paths of high-temperature and low-pressure gaseous refrigerant flow into the third port 133 of the reversing valve 13, and then flow out of the first port 131 of the reversing valve 13 into the suction port of the compressor 12, thereby completing a defrosting cycle.
With the arrangement, part of the refrigerant can be shunted to the heat accumulator 22 to absorb heat in the defrosting process, and the heat accumulator 22 is cooperated with the first heat exchanger 14 to defrost the second heat exchanger 16, so that the defrosting efficiency is improved, and the water temperature fluctuation of the user side is reduced.
In one embodiment, referring to fig. 2, the heat pump system has a single heating mode, in which the first on-off valve 24 is closed, the first throttling device 15 is opened, the second throttling device 23 is closed, and the suction port and the discharge port of the compressor 12 are respectively communicated with the second heat exchanger 16 and the first heat exchanger 14 through the reversing valve 13. Specifically, the second port 132 and the third port 133 of the direction valve 13 are opened, and the first port 131 and the fourth port 134 of the direction valve 13 are opened.
In the single heating mode, the high-temperature and high-pressure gaseous refrigerant firstly enters the second interface 132 of the reversing valve 13 through the exhaust port of the compressor 12, then flows out of the third interface 133 of the reversing valve 13 and enters the first heat exchanger 14 to be condensed and release heat so as to improve the water temperature of a user side, the condensed low-temperature and high-pressure liquid refrigerant passes through the first throttling device 15 to be throttled and decompressed into a low-temperature and low-pressure liquid refrigerant, the low-temperature and low-pressure liquid refrigerant then flows into the second heat exchanger 16 to be evaporated and absorbed to be changed into the high-temperature and low-pressure gaseous refrigerant, the high-temperature and low-pressure gaseous refrigerant flows into the fourth interface 134 of the reversing valve 13, and then flows out of the first interface 131 of the reversing valve 13 to enter the air inlet of the compressor 12, so as to complete a single heating cycle.
In one embodiment, a temperature measuring device is disposed at the user side water return port a of the first heat exchanger 14, and can detect the temperature of water at the user side water return port a.
It is required to explain that，T in The return water temperature of the heat pump system is obtained by detecting the return water temperature of the return water port a of the heat pump system on the user side at the first heat exchanger 14. T is end And when the return water temperature of the system reaches the set value, the heat pump system stops.
When the return water temperature is lower and the difference between the shutdown temperature and the return water temperature is more than 2-4 ℃ (namely T end -T in > 2-4 c) and the heat pump system enters a single heating mode so that the refrigerant uses all the heat to raise the user side water temperature.
When the heating capacity of the heat pump system is greater than the heat dissipation capacity of the water side at the tail end of a user, for example, when the heating load at the user side is reduced, the return water temperature of the heat pump system continuously rises, and when the difference between the shutdown temperature and the return water temperature is less than or equal to 2-4 ℃ (namely T is equal to or less than T) end -T in 2-4 deg.c) so that the heat pump system enters a heat storage and heating mode to allow the refrigerant to provide heat to the user side while a portion of the heat is stored in the heat accumulator 22.
When the temperature of the return water rises to the set shutdown temperature of the heat pump system (namely T) if the temperature of the return water continuously rises in the heating and heat storage mode of the heat pump system in ≥T end ) The heat pump system stops operating.
When the heat pump system is in a stop operation state, the return water temperature can be gradually reduced along with the gradual heat use process of a user side, and when the difference between the stop temperature and the return water temperature is more than or equal to 4-6 ℃ (namely T end -T in Not less than 4-6 ℃), restarting the heat pump system and entering into a separate heating mode to operate.
With the arrangement, the heat pump system can not be frequently started or stopped in the state of having the independent heating mode and the heating and heat storage mode, so that the service life of the heat pump system is prolonged, a part of heat energy can be stored by the heat accumulator 22, and the energy consumption and waste are reduced.
In one embodiment, referring to fig. 3, the heat pump system has an individual cooling mode, in which the first on-off valve 24 is closed, the first throttling device 15 is opened, the second throttling device 23 is closed, and the suction port and the discharge port of the compressor 12 are respectively communicated with the first heat exchanger 14 and the second heat exchanger 16 through the reversing valve 13. Specifically, the second port 132 and the fourth port 134 of the direction valve 13 are conductive, and the first port 131 and the third port 133 of the direction valve 13 are conductive.
In the single refrigeration mode, the high-temperature and high-pressure gaseous refrigerant firstly enters the second interface 132 of the reversing valve 13 through the exhaust port of the compressor 12, then flows into the second heat exchanger 16 from the fourth interface 134 of the reversing valve 13 and condenses in the second heat exchanger 16 to release heat, the condensed low-temperature and high-pressure liquid refrigerant firstly flows into the first throttling device 15 along the refrigerant circulation pipeline 11 to be throttled and decompressed into a low-temperature and low-pressure liquid refrigerant, then enters the first heat exchanger 14 to be evaporated and absorb heat to cool the water temperature at the user side, the evaporated high-temperature and low-pressure gaseous refrigerant flows into the third interface 133 of the reversing valve 13, and then flows out of the first interface 131 of the reversing valve 13 to enter the air inlet of the compressor 12, so as to complete a single refrigeration cycle.
In one embodiment, referring to fig. 1, the heat pump system includes a heat recovery pipe 3 and a three-way valve 4. The three-way valve 4 includes a first port 41, a second port 42, and a third port 43, the first port 41 communicates with the direction valve 13, the second port 42 communicates with the second heat exchanger 16, a first end of the heat recovery line 3 communicates with the third port 43, and a second end of the heat recovery line 3 is connected between the first switching valve 24 and the regenerator 22. Specifically, the first port 41 communicates with the fourth port 134 of the selector valve 13. The three-way valve 4 can switch the flow path of the refrigerant, and can communicate between the first port 41 and the second port 42, or between the first port 41 and the third port 43. That is, the three-way valve 4 can switch the refrigerant flowing out of the fourth port 134 of the direction change valve 13 to the heat recovery pipeline 3 or to the refrigerant circulation pipeline 11 as needed.
The second end of the heat recovery line 3 is connected to the first on-off valve 24 and the accumulator 22, that is, the second end of the heat recovery line 3 is connected to the refrigerant heat accumulating line 21, and when it is necessary to accumulate energy in the accumulator 22, the refrigerant can directly flow along the heat recovery line 3 into the accumulator 22.
In the heat pump system, for example, in the heat storage heating mode, the defrosting mode, the heating-only mode, and the cooling-only mode, the first valve port 41 and the second valve port 42 are opened, and the first valve port 41 and the third valve port 43 are closed.
In one embodiment, referring to fig. 6, the heat pump system has a heat recovery cooling mode, in which the first on-off valve 24 is closed, the first throttle device 15 and the second throttle device 23 are both opened, the first valve port 41 and the third valve port 43 are opened, the first valve port 41 and the second valve port 42 are closed, and the suction port and the exhaust port of the compressor 12 are respectively communicated with the first heat exchanger 14 and the first valve port 41 through the reversing valve 13. Specifically, the second port 132 and the fourth port 134 of the direction valve 13 are conductive, and the first port 131 and the third port 133 of the direction valve 13 are conductive.
In the heat recovery refrigeration mode, the high-temperature and high-pressure gaseous refrigerant firstly enters the second port 132 of the reversing valve 13 through the exhaust port of the compressor 12, then flows into the first port 41 of the three-way valve 4 from the fourth port 134 of the reversing valve 13, then directly flows into the heat accumulator 22 from the third port 43 of the three-way valve 4 along the heat recovery pipeline 3 to be condensed and release heat, so as to recover the heat energy in the water at the user side to the heat accumulator 22 for storage, the condensed low-temperature and high-pressure liquid refrigerant sequentially flows through the second throttling device 23 and the first throttling device 15 to be throttled and depressurized into a low-temperature and low-pressure liquid refrigerant, then enters the first heat exchanger 14 to be evaporated and absorbed to cool the water at the user side, the evaporated high-temperature and low-pressure gaseous refrigerant flows into the third port 133 of the reversing valve 13, and then flows out of the first port 131 of the reversing valve 13 to enter the intake port of the compressor 12, thereby completing a heat recovery refrigeration cycle.
In an embodiment, referring to fig. 1, the heat pump system includes a refrigerant branch 5 and a second on-off valve 6 located on the refrigerant branch 5, a first end of the refrigerant branch 5 is connected to a pipeline between the regenerator 22 and the second throttling device 23, and a second end of the refrigerant branch 5 is connected between the second heat exchanger 16 and the three-way valve 4. Specifically, a first end of the refrigerant branch line 5 is connected to the refrigerant heat accumulation pipeline 21, and a second end of the refrigerant branch line 5 is connected to the refrigerant circulation pipeline 11. That is, the accumulator 22 can directly communicate with the second heat exchanger 16 through the refrigerant bypass 5 without passing through the second throttle device 23.
In one embodiment, referring to fig. 7, the heat pump system has a heat dissipation and heat recovery cooling mode, in the heat dissipation and heat recovery cooling mode, the first switch valve 24 and the second throttling device 23 are both closed, the second switch valve 6 and the first throttling device 15 are both opened, the first valve port 41 and the third valve port 43 are connected, the first valve port 41 and the second valve port 42 are closed, and the suction port and the exhaust port of the compressor 12 are respectively connected to the first heat exchanger 14 and the first valve port 41 through the reversing valve 13. Specifically, the second port 132 and the fourth port 134 of the direction valve 13 are conductive, and the first port 131 and the third port 133 of the direction valve 13 are conductive.
In the heat dissipation and heat recovery refrigeration mode, the high-temperature and high-pressure gaseous refrigerant firstly enters the second port 132 of the reversing valve 13 through the exhaust port of the compressor 12, then flows into the first port 41 of the three-way valve 4 from the fourth port 134 of the reversing valve 13, then flows into the heat accumulator 22 along the heat recovery pipeline 3 from the third port 43 of the three-way valve 4 to condense and release heat so as to recover the heat energy in the water at the user side to the heat accumulator 22 for storage, then flows into the second heat exchanger 16 through the second on-off valve 6 to further condense and release heat, the condensed low-temperature and high-pressure liquid refrigerant flows through the first throttling device 15 to be throttled and decompressed into a low-temperature and low-pressure liquid refrigerant, then enters the first heat exchanger 14 to evaporate and absorb heat so as to cool the water temperature at the user side, the evaporated high-temperature and low-pressure gaseous refrigerant flows into the third port 133 of the reversing valve 13, and then flows out of the first port 131 of the reversing valve 13 to enter the air inlet port of the compressor 12, thereby completing a heat dissipation and heat recovery refrigeration cycle.
For example, the heat pump system is in the heat storage heating mode, the defrosting mode, the heating-only mode, the cooling-only mode, and the heat recovery cooling mode, and the second on-off valve 6 is in the closed state.
In one embodiment, a temperature measuring device is disposed at the heat accumulator 22 to detect the temperature inside the heat accumulator 22.
Note that T is o The temperature of the heat accumulator 22 is obtained by detecting the temperature of the internal material of the heat accumulator 22. T is p The phase change temperature of the phase change heat storage material used for the heat accumulator 22.
Often in summerWhen the heat pump system needs to refrigerate the first heat exchanger 14 at the user side and the difference between the phase change temperature of the phase change heat storage material and the temperature of the heat accumulator 22 is more than 3-5 ℃ (namely T) p -T o And 3-5 ℃), and the heat pump system enters a heat recovery refrigeration mode to recover the heat energy in the water at the user side to the heat accumulator 22 for storage.
In the working process of the heat pump system in the heat recovery refrigeration mode, the heat energy released by the first heat exchanger 14 on the user side is recovered and stored through the heat accumulator 22, and as the heat stored in the heat accumulator 22 increases, the temperature of the heat accumulator 22 gradually increases, and the heat exchange efficiency between the heat accumulator 22 and the refrigerant gradually decreases, so that the condensation heat absorption effect of the refrigerant on the first heat exchanger 14 becomes poor, and the refrigeration effect is affected. Therefore, when the difference between the phase change temperature of the phase change heat storage material and the temperature of the heat accumulator 22 is 3 to 5 ℃, (i.e., T ℃) p -T o At most 3-5 ℃), the heat pump system exits the heat recovery refrigeration mode and enters the heat dissipation heat recovery refrigeration mode, so that the excessive heat energy which cannot be stored in the heat accumulator 22 is discharged through the second heat exchanger 16.
When the heat accumulator 22 is made of a phase-change heat storage material and the heat stored in the heat accumulator 22 is more and more, the temperature in the heat accumulator 22 is also increased continuously, when the temperature reaches a certain degree, the heat accumulator 22 is difficult to continuously absorb the heat, and the overall performance of the heat pump system is also influenced by an excessively high temperature, so that the significance of recycling the refrigerant to store heat in the heat accumulator 22 in such a state is not great. Therefore, when the difference between the temperature of the heat accumulator 22 and the phase change temperature of the phase change heat storage material is 5 to 8 ℃ or more (i.e., T ℃) o -T p Not less than 5-8 ℃), the heat pump system enters into a single refrigeration mode, so that excessive heat energy in water at the user side is directly discharged through the second heat exchanger 16.
During the operation of the heat pump system in the single cooling mode, in some cases, the temperature of the heat accumulator 22 will gradually decrease, for example, during the process of using the heat stored in the heat accumulator 22 by the user, the temperature of the heat accumulator 22 gradually decreases as the heat is used by the user; or the temperature of the heat accumulator 22 gradually decreases under the influence of natural heat loss of the heat accumulator 22, and the like. When the temperature of the heat accumulator 22 is equal to the phase change heat storage materialThe difference of the phase transition temperature of the material is less than or equal to 0-3 ℃ (T) o -T p Less than or equal to 0-3 ℃), the heat pump system exits the independent refrigeration mode and enters a heat dissipation and heat recovery refrigeration mode, a part of heat is directly discharged through the second heat exchanger 16, and a part of heat is recovered to the heat accumulator 22 for storage.
In the working process of the heat pump system in the heat dissipation heat recovery refrigeration mode, when a user further utilizes the heat stored in the heat accumulator 22, the temperature of the heat accumulator 22 is further reduced, and when the difference between the phase change temperature of the phase change heat storage material and the temperature of the heat accumulator 22 is greater than or equal to 5-7 ℃ (namely T is T p -T o Not less than 5-7 ℃), and the heat pump system exits the heat dissipation heat recovery refrigeration mode and enters the heat recovery refrigeration mode so as to continuously recover the heat energy in the water at the user side to the heat accumulator 22 for storage.
The heat pump system of this application is under the refrigerated operating mode of user side, and the refrigerant can be stored in transferring the heat of user side to heat accumulator 22, and when the heat in heat accumulator 22 was saturated, too much heat also can be discharged through second heat exchanger 16 simultaneously, thereby has avoided the continuous rising of the in-process heat accumulator 22 temperature of retrieving to lead to the too high problem that influences the system performance of heat pump system condensation temperature.
The various embodiments/implementations provided herein may be combined with each other without contradiction. The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A heat pump system, comprising:
the heat pump module comprises a refrigerant circulating pipeline, and a compressor, a reversing valve, a first heat exchanger, a first throttling device and a second heat exchanger which are sequentially arranged on the refrigerant circulating pipeline;
the heat storage module comprises a refrigerant heat storage pipeline, and a heat accumulator and a second throttling device which are sequentially arranged on the refrigerant heat storage pipeline; the first end of the refrigerant heat accumulation pipeline is connected between the reversing valve and the first heat exchanger, and the second end of the refrigerant heat accumulation pipeline is connected between the first throttling device and the second heat exchanger.
2. The heat pump system of claim 1, wherein the thermal storage module includes a first switching valve disposed on the refrigerant thermal storage circuit, the first switching valve being located between the reversing valve and the thermal storage.
3. The heat pump system of claim 2, wherein the heat pump system has a heating only mode in which the first on-off valve is closed, the first throttling device is open, the second throttling device is closed, and the suction port of the compressor and the discharge port of the compressor communicate with the second heat exchanger and the first heat exchanger, respectively, through the reversing valve.
4. The heat pump system of claim 2, wherein the heat pump system has a cooling-only mode in which the first on-off valve is closed, the first throttling device is open, the second throttling device is closed, and the suction port of the compressor and the discharge port of the compressor communicate with the first heat exchanger and the second heat exchanger, respectively, through the reversing valve.
5. The heat pump system according to claim 1, wherein said heat pump system has a heat-storage heating mode in which said first throttling means and said second throttling means are both open, and an intake port of said compressor and an exhaust port of said compressor communicate with said second heat exchanger and said first heat exchanger, respectively, through said reversing valve.
6. The heat pump system of claim 1, wherein the heat pump system has a defrost mode in which the first and second flow restriction devices are both open, and the suction port of the compressor and the discharge port of the compressor communicate with the first and second heat exchangers, respectively, through the reversing valve.
7. The heat pump system of claim 2, wherein the heat pump system comprises a heat recovery line and a three-way valve; the three-way valve comprises a first valve port, a second valve port and a third valve port, the first valve port is communicated with the reversing valve, the second valve port is communicated with the second heat exchanger, the first end of the heat recovery pipeline is communicated with the third valve port, and the second end of the heat recovery pipeline is connected between the first switch valve and the heat accumulator.
8. The heat pump system of claim 7, wherein the heat pump system has a heat recovery cooling mode, and in the heat recovery cooling mode, the first on-off valve is closed, the first throttle device and the second throttle device are both open, the first port and the third port are open, the first port and the second port are closed, and the suction port of the compressor and the discharge port of the compressor are in communication with the first heat exchanger and the first port through the reversing valve, respectively.
9. The heat pump system according to claim 7, wherein the heat pump system comprises a refrigerant branch and a second on-off valve located on the refrigerant branch, a first end of the refrigerant branch is connected to a pipeline between the regenerator and the second throttling device, and a second end of the refrigerant branch is connected between the second heat exchanger and the three-way valve.
10. The heat pump system of claim 9, wherein the heat pump system has a cooling heat recovery cooling mode, and in the cooling heat recovery cooling mode, the first switch valve and the second throttling device are both closed, the second switch valve and the first throttling device are both open, the first port and the third port are open, the first port and the second port are closed, and the suction port of the compressor and the exhaust port of the compressor are in communication with the first heat exchanger and the first port through the reversing valve, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222427170.0U CN218120240U (en) | 2022-09-13 | 2022-09-13 | Heat pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222427170.0U CN218120240U (en) | 2022-09-13 | 2022-09-13 | Heat pump system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218120240U true CN218120240U (en) | 2022-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222427170.0U Active CN218120240U (en) | 2022-09-13 | 2022-09-13 | Heat pump system |
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| Country | Link |
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| CN (1) | CN218120240U (en) |
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2022
- 2022-09-13 CN CN202222427170.0U patent/CN218120240U/en active Active
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