CN217504035U - Heat pump system - Google Patents
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- CN217504035U CN217504035U CN202221273982.8U CN202221273982U CN217504035U CN 217504035 U CN217504035 U CN 217504035U CN 202221273982 U CN202221273982 U CN 202221273982U CN 217504035 U CN217504035 U CN 217504035U
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Abstract
The application provides a heat pump system, including intermediate heat exchanger, first indirect heating equipment group and second indirect heating equipment group. The intermediate heat exchanger includes an evaporator and a condenser arranged side by side. One of the evaporator and the condenser is connected with the first heat exchange equipment group; the other of the evaporator and the condenser is connected with the second heat exchange device group. By arranging the first heat exchange equipment group and the second heat exchange equipment group in parallel, one of the first heat exchange equipment group and the second heat exchange equipment group can be started or closed during conventional heat exchange. Therefore, compared with the scheme that the first heat exchange equipment group and the second heat exchange equipment group are directly connected with each other to enable the first heat exchange equipment group and the second heat exchange equipment group to be started or closed simultaneously, the overall energy efficiency of the heat pump system is effectively improved. Meanwhile, through the intermediate heat exchanger, the second heat exchange equipment set can provide higher evaporation temperature for the first heat exchange equipment set, so that the purpose of low-temperature heat exchange is realized, and the outlet water temperature is increased.
Description
Technical Field
The application relates to the field of heat exchange equipment, in particular to a heat pump system.
Background
In the related art, the first heat exchange device group and the second heat exchange device group are directly connected with each other, so that the first heat exchange device group and the second heat exchange device group need to be started or closed simultaneously when heating or cooling is performed conventionally. Therefore, the problem that the energy efficiency of the first heat exchange equipment group and the second heat exchange equipment group is poor is caused.
SUMMERY OF THE UTILITY MODEL
The present application provides a heat pump system that aims to improve energy efficiency.
The application provides a heat pump system, which comprises an intermediate heat exchanger, a first heat exchange equipment set and a second heat exchange equipment set; the first heat exchange device group comprises at least one first heat exchange device, and the second heat exchange device group comprises at least one second heat exchange device;
the intermediate heat exchanger comprises an evaporator and a condenser which are arranged side by side, wherein one of the evaporator and the condenser is connected with the first heat exchange equipment group; the other of the evaporator and the condenser is connected with the second heat exchange equipment group.
Optionally, the first heat exchange device group includes a first heat exchange device; the second heat exchange device group comprises a second heat exchange device;
the evaporator is connected with the first heat exchange equipment, and the condenser is connected with the second heat exchange equipment.
Optionally, the first heat exchange device includes a first compressor, a first four-way valve, a first heat exchanger and a second heat exchanger;
the first compressor includes a first port and a second port; the first four-way valve comprises a first port, a second port, a third port and a fourth port;
the first port is connected with the first port; the second port is connected with the third port; the second port is connected with the first heat exchanger; the fourth port is connected with the second heat exchanger; the first heat exchanger is connected with the second heat exchanger;
the evaporator comprises a first input end and a first output end, the first input end is connected with the second heat exchanger, and the first output end is connected between the first port and the first port.
Optionally, the heat pump system comprises a first mode of operation; in the first operating mode, the second port, the third port, the second port, the first heat exchanger, the second heat exchanger, the fourth port, the first port, and the first port are sequentially communicated to form a first refrigeration circuit.
Optionally, the heat pump system comprises a second mode of operation; in the second operation mode, the second port, the third port, the fourth port, the second heat exchanger, the first heat exchanger, the second port, the first port, and the first port are sequentially communicated to form a first heating circuit.
Optionally, the second heat exchange device includes a second compressor, a second four-way valve, a third heat exchanger and a fourth heat exchanger;
the second compressor includes a third port and a fourth port; the second four-way valve comprises a fifth port, a sixth port, a seventh port and an eighth port;
the third port is connected with the fifth port; the fourth port is connected with the seventh port; the sixth port is connected with the third heat exchanger; the eighth port is connected with the fourth heat exchanger; the third heat exchanger is connected with the fourth heat exchanger;
the condenser comprises a second input end and a second output end; the second input end is connected with the third port; the second output end is connected with the third heat exchanger.
Optionally, the heat pump system comprises a first mode of operation; in the first operating mode, the third port, the fifth port, the sixth port, the third heat exchanger, the fourth heat exchanger, the eighth port, the seventh port, and the fourth port are sequentially communicated to form a second refrigeration circuit.
Optionally, the heat pump system comprises a second mode of operation; in the second operating mode, the third port, the fifth port, the eighth port, the fourth heat exchanger, the third heat exchanger, the sixth port, the seventh port, and the fourth port are sequentially communicated to form a second heating circuit.
Optionally, the first heat exchange device includes a first compressor, a first four-way valve, a first heat exchanger and a second heat exchanger;
the first compressor includes a first port and a second port; the first four-way valve comprises a first port, a second port, a third port and a fourth port;
the first port is connected with the first port; the second port is connected with the third port; the second port is connected with the first heat exchanger; the fourth port is connected with the second heat exchanger; the first heat exchanger is connected with the second heat exchanger;
the second heat exchange equipment comprises a second compressor, a second four-way valve, a third heat exchanger and a fourth heat exchanger;
the second compressor includes a third port and a fourth port; the second four-way valve comprises a fifth port, a sixth port, a seventh port and an eighth port;
the third port is connected with the fifth port; the fourth port is connected with the seventh port; the sixth port is connected with the third heat exchanger; the eighth port is connected with the fourth heat exchanger; the third heat exchanger is connected with the fourth heat exchanger;
the heat pump system includes a third mode of operation; in the third operating mode, the second port, the third port, the second port, the first heat exchanger, the second heat exchanger, the fourth port, the first port, and the first port are sequentially communicated to form a first refrigeration circuit; and
the third port, the fifth port, the sixth port, the third heat exchanger, the fourth heat exchanger, the eighth port, the seventh port, and the fourth port are sequentially communicated to form a second refrigeration circuit.
Optionally, the heat pump system comprises a fourth mode of operation; in the fourth operating mode, the second port, the third port, the fourth port, the second heat exchanger, the first heat exchanger, the second port, the first port, and the first port are sequentially communicated to form a first heating circuit; and
the third port, the fifth port, the eighth port, the fourth heat exchanger, the third heat exchanger, the sixth port, the seventh port, and the fourth port are sequentially communicated to form a second heating circuit.
Optionally, the heat pump system comprises a fifth mode of operation; and in the fifth working mode, the second port, the third port, the fourth port, the second heat exchanger, the evaporator and the first port are sequentially communicated, and the third port, the condenser, the third heat exchanger, the sixth port, the seventh port and the fourth port are sequentially communicated to form a low-temperature heating loop.
Optionally, the first heat exchanger includes a first interface and a second interface; the first interface is connected with the second interface; the second heat exchanger comprises a third interface and a fourth interface; the third interface is connected with the fourth interface;
the evaporator comprises a first input end and a first output end, the first input end is connected with the fourth interface, and the first output end is connected between the first port and the first port;
the first heat exchange device further comprises a first expansion device and a second expansion device, wherein the first expansion device is connected between the second port and the fourth port; the second expansion device is connected between the fourth port and the first input.
Optionally, the third heat exchanger includes a fifth port and a sixth port; the fifth interface is connected with the sixth port; the fourth heat exchanger comprises a seventh interface and an eighth interface; the seventh interface is connected with the eighth port;
the condenser comprises a second input end and a second output end; the second input end is connected with the third port; the second output end is connected with the sixth interface;
said second heat exchange means further comprising a third expansion device and a fourth expansion device, wherein said third expansion device is connected between said fourth heat exchanger and said third heat exchanger; the fourth expansion device is connected between the second output and the third heat exchanger.
Optionally, the second heat exchange device further comprises a first control device and a second control device, wherein the first control device is connected between the third port and the fifth port; the second control device is connected between the third port and the second input terminal.
The heat pump system that this application provided includes middle heat exchanger, first indirect heating equipment group and second indirect heating equipment group. The intermediate heat exchanger includes an evaporator and a condenser arranged side by side. One of the evaporator and the condenser is connected with the first heat exchange equipment group; the other of the evaporator and the condenser is connected with the second heat exchange device group. By arranging the first heat exchange equipment group and the second heat exchange equipment group in parallel, one of the first heat exchange equipment group and the second heat exchange equipment group can be started or closed during conventional heat exchange. Therefore, compared with the scheme that the first heat exchange equipment group and the second heat exchange equipment group are directly connected with each other to enable the first heat exchange equipment group and the second heat exchange equipment group to be started or closed simultaneously, the overall energy efficiency of the heat pump system is effectively improved. Meanwhile, through the intermediate heat exchanger, the second heat exchange equipment set can provide higher evaporation temperature for the first heat exchange equipment set, so that the purpose of low-temperature heat exchange is realized, and the outlet water temperature is increased.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
FIG. 1 is a schematic block diagram of an embodiment of a heat pump system of the present application;
FIG. 2 is a circuit schematic of an exemplary embodiment of the heat pump system of the present application in a first mode of operation;
FIG. 3 is a circuit schematic of an exemplary embodiment of the heat pump system of the present application in a second mode of operation;
FIG. 4 is a circuit schematic of another exemplary embodiment of the heat pump system of the present application in a first mode of operation;
FIG. 5 is a circuit schematic of another exemplary embodiment of the heat pump system of the present application in a second mode of operation;
FIG. 6 is a circuit schematic diagram illustrating an exemplary embodiment of a heat pump system provided herein in a third mode of operation;
FIG. 7 is a circuit schematic of an exemplary embodiment of a heat pump system provided herein in a fourth mode of operation;
fig. 8 is a circuit diagram illustrating an exemplary embodiment of a heat pump system in a fifth operating mode according to the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
The application provides a heat pump system, including intermediate heat exchanger, first indirect heating equipment group and second indirect heating equipment group. The first heat exchange device group comprises at least one first heat exchange device. The second heat exchange device group comprises at least one second heat exchange device. The intermediate heat exchanger includes an evaporator and a condenser arranged side by side. Wherein one of the evaporator and the condenser is connected with the first heat exchange equipment group. The other of the evaporator and the condenser is connected with the second heat exchange device group. By arranging the first heat exchange equipment group and the second heat exchange equipment group in parallel, one of the first heat exchange equipment group and the second heat exchange equipment group can be started or closed during conventional heat exchange. Therefore, compared with the scheme that the first heat exchange equipment group and the second heat exchange equipment group are directly connected with each other to enable the first heat exchange equipment group and the second heat exchange equipment group to be started or closed simultaneously, the overall energy efficiency of the heat pump system is effectively improved. Meanwhile, through the intermediate heat exchanger, the second heat exchange equipment set can provide higher evaporation temperature for the first heat exchange equipment set, so that the purpose of low-temperature heat exchange is realized, and the outlet water temperature is increased.
Fig. 1 is a schematic structural diagram of an embodiment of a heat pump system 1 provided in the present application. As shown in fig. 1, the heat pump system 1 has a function of transferring low-temperature thermal energy to high-temperature thermal energy. The heat pump system 1 comprises an intermediate heat exchanger 2, a first heat exchange device group 3 and a second heat exchange device group 4. The first heat exchange device group 3 comprises at least one first heat exchange device. The second heat exchange unit set 4 comprises at least one second heat exchange unit. The intermediate heat exchanger 2 comprises an evaporator 7 and a condenser 8 arranged side by side. Wherein one of the evaporator 7 and the condenser 8 is connected to the first heat exchange device group 3. The other of the evaporator 7 and the condenser 8 is connected to the second heat exchange device group 4. The first heat exchange device group 3 and the second heat exchange device group 4 are both device groups capable of realizing heat exchange and transfer. For example, the first heat exchange unit set 3 and the second heat exchange unit set 4 can transfer heat from a high temperature fluid to a low temperature fluid. In the related art, the first heat exchange device group 3 and the second heat exchange device group 4 are directly connected with each other, so that the first heat exchange device group 3 and the second heat exchange device group 4 must be started or closed at the same time, and the problem that the energy efficiency of the first heat exchange device group 3 and the energy efficiency of the second heat exchange device group 4 are poor is caused in the normal-temperature heat exchange process. Therefore, in this embodiment, by arranging the first heat exchange device group 3 and the second heat exchange device group 4 in parallel, that is, there is no direct connection relationship between the first heat exchange device group 3 and the second heat exchange device group 4, one of the first heat exchange device group 3 and the second heat exchange device group 4 can be turned on or off during normal cooling or heating. Specifically, the first heat exchange device group 3 may be started and the second heat exchange device group 4 may be closed, or the second heat exchange device group 4 may be started and the first heat exchange device group 3 may be closed, or the first heat exchange device group 3 and the second heat exchange device group 4 may be started or closed at the same time. Therefore, compared with the scheme that the first heat exchange equipment group 3 and the second heat exchange equipment group 4 are directly connected with each other to enable the first heat exchange equipment group 3 and the second heat exchange equipment group 4 to be started or closed simultaneously, the overall energy efficiency of the heat pump system 1 is effectively improved. Meanwhile, the refrigerant in the second heat exchange device group 4 is condensed by the condenser 8 of the intermediate heat exchanger 2, so that higher evaporation temperature can be provided for the evaporator 7 of the intermediate heat exchanger 2 and the first heat exchange device group 3, and the purpose of low-temperature heat exchange is realized, and the outlet water temperature is increased. In some embodiments, the condenser 8 comprises a condenser tube. The evaporator 7 includes an evaporation tube.
In some embodiments, the first heat exchange device group 3 may comprise one first heat exchange device or a plurality of first heat exchange devices. The first heat exchange device can perform refrigeration or heating through a refrigerant. The second heat exchange means set 4 may comprise one second heat exchange means or a plurality of second heat exchange means. The second heat exchange device can also carry out refrigeration or heating through the refrigerant. The evaporator 7 is connected to the first heat exchange means so that the refrigerant can circulate in the first heat exchange means and the evaporator 7. The condenser 8 is connected to the second heat exchange means so that the refrigerant circulates between the second heat exchange means and the condenser 8. Further, since the condenser 8 and the evaporator 7 are disposed close to each other and side by side, when heating is required in a low-temperature environment, the refrigerant in the second heat exchange device flows to the condenser 8 for condensation, so that a higher evaporation temperature can be provided for the evaporator 7 and the first heat exchange device, and high-temperature hot water can be prepared.
In some embodiments, the first heat exchange device comprises a first compressor 9, a first four-way valve 10, a first heat exchanger 11, and a second heat exchanger 12. The first compressor 9 comprises a first port 13 and a second port 14. The first four-way valve 10 includes a first port 15, a second port 16, a third port 17, and a fourth port 18. The first port 13 is connected to the first port 15. The second port 14 is connected to a third port 17. The second port 16 is connected to the first heat exchanger 11. The fourth port 18 is connected to the second heat exchanger 12. The first heat exchanger 11 is connected to the second heat exchanger 12. The evaporator 7 comprises a first input 19 and a first output 20. The first input 19 is connected to the second heat exchanger 12. The first output 20 is connected between the first port 15 and the first through opening 13. In this embodiment, when the second heat exchange device is in a closed state, the heat pump system 1 may form a refrigeration loop or a heating loop through the connection relationship among the first compressor 9, the first four-way valve 10, the first heat exchanger 11, and the second heat exchanger 12, so as to switch the heat pump system 1 between the refrigeration mode and the heating mode, so as to prepare low-temperature cold water or high-temperature hot water. In some embodiments, the first heat exchange device further comprises a first fan 22, and the first fan 22 is disposed near the first heat exchanger 11 to enhance the heat exchange effect of the first heat exchanger 11.
In addition, it should be noted that the heat pump system 1 of the present application may further include a plurality of heat exchange device groups, such as a third heat exchange device group, a fourth heat exchange device group, and the plurality of heat exchange device groups are not directly connected to each other. The specific operation mode of the heat pump system 1 will be described below by taking the heat pump system 1 including the first heat exchange device group 3 and the second heat exchange device group 4 as an example.
Fig. 2 is a circuit diagram illustrating an exemplary embodiment of the heat pump system 1 of the present application in a first operating mode. As shown in fig. 2, in some embodiments, the heat pump system 1 includes a first mode of operation; in the first operation mode, the second port 14, the third port 17, the second port 16, the first heat exchanger 11, the second heat exchanger 12, the fourth port 18, the first port 15 and the first port 13 are sequentially communicated to form a first refrigeration circuit (as shown by the direction of the arrow in fig. 2). In this embodiment, the first operation mode is a normal cooling mode of the first heat exchange device group 3. The refrigerant passes through the third port 17 and the second port 16 of the first four-way valve 10, the first heat exchanger 11 and the second heat exchanger 12 in sequence from the first compressor 9, and finally returns to the first compressor 9, and the refrigerant repeatedly circulates and flows in such a way, so that the conventional refrigeration of the first heat exchange equipment group 3 in the heat pump system 1 is realized, and the low-temperature cold water is prepared.
Fig. 3 is a circuit diagram illustrating an exemplary embodiment of the heat pump system 1 of the present application in a second mode of operation. As shown in fig. 3, in some embodiments, the heat pump system 1 includes a second mode of operation; in the second operation mode, the second port 14, the third port 17, the fourth port 18, the second heat exchanger 12, the first heat exchanger 11, the second port 16, the first port 15 and the first port 13 are sequentially communicated to form a first heating circuit (as shown by the direction of the arrow in fig. 3). In this embodiment, the second operation mode is a normal heating mode of the first heat exchange device group 3. The refrigerant passes through the third port 17 and the fourth port 18 of the first four-way valve 10, the second heat exchanger 12 and the first heat exchanger 11 in sequence from the first compressor 9, and finally returns to the first compressor 9, and the refrigerant repeatedly and circularly flows in such a way, so that the conventional heating of the first heat exchange equipment group 3 in the heat pump system 1 is realized, and the high-temperature hot water is prepared.
With continued reference to FIG. 1, in some embodiments, the second heat exchange apparatus includes a second compressor 24, a second four-way valve 25, a third heat exchanger 26, and a fourth heat exchanger 27. The second compressor 24 includes a third port 28 and a fourth port 29. The second four-way valve 25 includes a fifth port 30, a sixth port 31, a seventh port 32, and an eighth port 33. The third port 28 is connected to a fifth port 30. The fourth port 29 is connected to the seventh port 32. The sixth port 31 is connected to the third heat exchanger 26. The eighth port 33 is connected to the fourth heat exchanger 27; the third heat exchanger 26 is connected to a fourth heat exchanger 27. The condenser 8 comprises a second input 34 and a second output 35. The second input 34 is connected to the third port 28; the second output 35 is connected to the third heat exchanger 26. In this embodiment, when the first heat exchange device is in the off state, the heat pump system 1 may also form a cooling loop or a heating loop through the connection relationship among the second compressor 24, the second four-way valve 25, the third heat exchanger 26 and the fourth heat exchanger 27, so as to switch the heat pump system 1 between the cooling mode and the heating mode, so as to prepare low-temperature cold water or high-temperature hot water. In some embodiments, the second heat exchanging device 5 further comprises a second fan 36, and the second fan 36 is disposed near the third heat exchanger 26 to enhance the heat exchanging effect of the third heat exchanger 26.
Fig. 4 is a circuit diagram illustrating another exemplary embodiment of the heat pump system 1 of the present application in the first operating mode. As shown in fig. 4, in the first operation mode, the third port 28, the fifth port 30, the sixth port 31, the third heat exchanger 26, the fourth heat exchanger 27, the eighth port 33, the seventh port 32, and the fourth port 29 are sequentially communicated to form the second refrigeration circuit (as shown by the direction of the arrow in fig. 4). In this embodiment, the first operation mode is a normal cooling mode of the second heat exchange device group 4. The refrigerant passes through the fifth port 30 and the sixth port 31 of the second four-way valve 25, the third heat exchanger 26 and the fourth heat exchanger 27 in sequence from the second compressor 24, and finally returns to the second compressor 24, and the refrigerant is circulated repeatedly in such a way, so that the conventional refrigeration of the second heat exchange equipment group 4 in the heat pump system 1 is realized, and the low-temperature cold water is prepared.
Fig. 5 is a circuit diagram illustrating another exemplary embodiment of the heat pump system 1 of the present application in the second mode of operation. As shown in fig. 5, in the second operation mode, the third port 28, the fifth port 30, the eighth port 33, the fourth heat exchanger 27, the third heat exchanger 26, the sixth port 31, the seventh port 32 and the fourth port 29 are sequentially communicated to form a second heating circuit (as shown by the direction of the arrow in fig. 5). In this embodiment, the second operation mode is a normal heating mode of the second heat exchange device group 4. The refrigerant passes through the fifth port 30 and the eighth port 33 of the second four-way valve 25, the fourth heat exchanger 27 and the third heat exchanger 26 in sequence from the second compressor 24, and finally returns to the second compressor 24, and the refrigerant is circulated repeatedly in such a way, so that the conventional heating of the second heat exchange equipment group 4 in the heat pump system 1 is realized, and the high-temperature hot water is prepared.
Fig. 6 is a circuit diagram illustrating an exemplary embodiment of the heat pump system 1 in the third operating mode according to the present application. As shown in fig. 6, the heat pump system 1 includes a third operation mode; in the third operation mode, the second port 14, the third port 17, the second port 16, the first heat exchanger 11, the second heat exchanger 12, the fourth port 18, the first port 15, and the first port 13 are sequentially communicated to form a first refrigeration circuit (as indicated by the direction of the left arrow in fig. 6), and the third port 28, the fifth port 30, the sixth port 31, the third heat exchanger 26, the fourth heat exchanger 27, the eighth port 33, the seventh port 32, and the fourth port 29 are sequentially communicated to form a second refrigeration circuit (as indicated by the direction of the right arrow in fig. 6). In this embodiment, the third operation mode is a normal cooling mode in which the first heat exchange device group 3 and the second heat exchange device group 4 are simultaneously activated. When the first refrigeration loop formed by the first heat exchange device group 3 has insufficient refrigeration capacity, the second heat exchange device group 4 can be started to form a second refrigeration loop. So, refrigerate simultaneously through first indirect heating equipment group 3 and second indirect heating equipment group 4 to improve refrigeration effect.
Fig. 7 is a circuit diagram illustrating an exemplary embodiment of the heat pump system 1 in a fourth operating mode according to the present application. As shown in fig. 7, the heat pump system 1 includes a fourth operation mode; in the fourth operation mode, the second port 14, the third port 17, the fourth port 18, the second heat exchanger 12, the first heat exchanger 11, the second port 16, the first port 15 and the first port 13 are communicated in sequence to form a first heating circuit (as shown by the direction of the left arrow in fig. 7); and the third port 28, the fifth port 30, the eighth port 33, the fourth heat exchanger 27, the third heat exchanger 26, the sixth port 31, the seventh port 32, and the fourth port 29 are communicated in series to form a second heating circuit (as shown in the direction indicated by the arrow on the right side in fig. 7). In this embodiment, the fourth operation mode is a normal heating mode in which the first heat exchange device group 3 and the second heat exchange device group 4 are simultaneously activated. When the first heating loop formed by the first heat exchange device group 3 has insufficient refrigerating capacity, the second heat exchange device group 4 can be started to form a second heating loop. So, heat simultaneously through first indirect heating equipment group 3 and second indirect heating equipment group 4 to improve the effect of heating.
Fig. 8 is a circuit diagram illustrating an exemplary embodiment of the heat pump system 1 in a fifth operation mode according to the present application. As shown in fig. 8, the heat pump system 1 includes a fifth operation mode; in the fifth operation mode, the second port 14, the third port 17, the fourth port 18, the second heat exchanger 12, the evaporator 7 and the first port 13 are sequentially communicated, and the third port 28, the condenser 8, the third heat exchanger 26, the sixth port 31, the seventh port 32 and the fourth port 29 are sequentially communicated to form a low-temperature heating loop (as shown by the direction of the arrow in fig. 8). In this embodiment, the fifth operating mode is a low-temperature heating mode in which the first heat exchanging device group 3, the second heat exchanging device group 4, and the intermediate heat exchanger 2 are simultaneously started. The low temperature heating mode is also a cascade cycle mode. Since the ambient temperature in winter in north is very low, for example, the ambient temperature may be lower than-20 ℃, however, when the ambient temperature is lower than-20 ℃, the outlet water temperature of the heat pump system 1 is generally 45 ℃, and the outlet water temperature of the heat pump system 1 decreases with the decrease of the ambient temperature, which results in poor comfort of water temperature. Therefore, the heat pump system 1 needs to start the cascade circulation mode to raise the temperature of the outlet water of the heat pump system 1, so as to satisfy the comfort level of the water temperature feeling. Specifically, the refrigerant passes through the third port 17 and the fourth port 18 of the first four-way valve 10 from the first compressor 9, is condensed in the second heat exchanger 12, is evaporated by the evaporator 7, and finally returns to the first compressor 9 (as shown by the direction of the left arrow in fig. 8), and is circulated repeatedly. And the refrigerant is condensed from the second compressor 24 through the condenser 8, is evaporated through the third heat exchanger 26, passes through the sixth port 31 and the seventh port 32 of the second four-way valve 25, and finally returns to the second compressor 24 (as shown by the direction of the right arrow in fig. 8), and thus is circulated repeatedly. Therefore, the refrigerant in the second heat exchange device flows to the condenser 8 for condensation, so that higher evaporation temperature can be provided for the evaporator 7 and the first heat exchange device, and the purpose of low-temperature heating is further realized, so that high-temperature hot water can be prepared.
In some embodiments, the first heat exchanger 11 includes a first port 40 and a second port 41; the first port 40 is connected with the second port 16; the second heat exchanger 12 comprises a third port 42 and a fourth port 43; the third interface 42 is connected to the fourth interface 18; the first input end 19 of the evaporator 7 is connected with the fourth port 43, and the first output end 20 is connected between the first port 15 and the first port 13; the first heat exchange device further comprises a first expansion means 44 and a second expansion means 45, wherein the first expansion means 44 is connected between the second connection 41 and the fourth connection 43; a second expansion device 45 is connected between the fourth connection 43 and the first input 19. In this embodiment, by connecting the first expansion device 44 between the first heat exchanger 11 and the second heat exchanger 12, and connecting the second expansion device 45 between the second heat exchanger 12 and the evaporator 7, the first expansion device 44 can be further controlled to be opened and the second expansion device 45 can be further controlled to be closed, so that the refrigerant can circulate among the first compressor 9, the first four-way valve 10, the first heat exchanger 11 and the second heat exchanger 12, so as to realize the circulation of the first refrigeration loop or the first heating loop, and thus the first heat exchange device group 3 can realize the purpose of normal refrigeration or normal heating. Alternatively, by controlling the first expansion device 44 to be closed and the second expansion device 45 to be opened, the refrigerant is circulated among the first compressor 9, the first four-way valve 10, the second heat exchanger 12, and the evaporator 7 to realize circulation in the evaporation circuit in the cascade circulation mode.
In some embodiments, the third heat exchanger 26 includes a fifth interface 46 and a sixth interface 47; the fifth interface 46 is connected to the sixth port 31; the fourth heat exchanger 27 comprises a seventh port 48 and an eighth port 49; the seventh interface 48 is connected to the eighth port 33; the second input 34 of the condenser 8 is connected to the third port 28, and the second output 35 is connected to the sixth port 47. The second heat exchange means further comprises a third expansion device 50 and a fourth expansion device 51, wherein the third expansion device 50 is connected between the fourth heat exchanger 27 and the third heat exchanger 26; a fourth expansion device 51 is connected between the second output 35 and the third heat exchanger 26. In this embodiment, by connecting the third expansion device 50 between the fourth heat exchanger 27 and the third heat exchanger 26, and connecting the fourth expansion device 51 between the third heat exchanger 26 and the condenser 8, it is further possible to control the third expansion device 50 to be opened and the fourth expansion device 51 to be closed, so that the refrigerant circulates among the second compressor 24, the second four-way valve 25, the third heat exchanger 26 and the fourth heat exchanger 27, so as to realize the circulating circulation of the second refrigeration circuit or the second heating circuit, thereby the second heat exchange device group 4 realizes the purpose of normal refrigeration or normal heating. Alternatively, the refrigerant is circulated through the second compressor 24, the condenser 8, the third heat exchanger 26, and the second four-way valve 25 by controlling the third expansion device 50 to be closed and the fourth expansion device 51 to be opened, so that the circulation of the condensation circuit is realized in the cascade circulation mode.
At the start of the cascade cycle mode, the first expansion device 44 is closed, the second expansion device 45 is opened, and the third expansion device 50 is closed and the fourth expansion device 51 is opened. Thus, after the refrigerant flowing to the condenser 8 is condensed, higher evaporation temperature can be provided for the evaporator 7 and the first heat exchange equipment, and the purpose of low-temperature heating is further realized, so that high-temperature hot water can be prepared.
In some embodiments, first expansion device 44 comprises an electronic expansion valve. The second expansion device 45 comprises an electronic expansion valve. The third expansion device 50 comprises an electronic expansion valve. The fourth expansion device 51 comprises an electronic expansion valve.
In some embodiments, the second heat exchange apparatus further comprises a first control device 52 and a second control device 53, wherein first control device 52 is connected between third port 28 and fifth port 30; the second control device 53 is connected between the third port 28 and the second input 34. In this embodiment, when the heat pump system 1 is in normal heating or cooling, the first control device 52 is controlled to be turned on and the second control device 53 is controlled to be turned off, so that the refrigerant in the second compressor 24 can flow to the second four-way valve 25 without flowing into the condenser 8. When the heat pump system 1 is in the low-temperature heating mode, the first control device 52 is turned off and the second control device 53 is turned on, so that the refrigerant in the second compressor 24 can flow to the condenser 8 without flowing into the second four-way valve 25. Therefore, the structure is simple, and the effect of controlling the flow direction of the refrigerant is good. In some embodiments, the first control device 52 comprises a solenoid valve. The second control device 53 includes a solenoid valve.
Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.
Claims (14)
1. A heat pump system is characterized by comprising an intermediate heat exchanger, a first heat exchange equipment set and a second heat exchange equipment set; the first heat exchange device group comprises at least one first heat exchange device, and the second heat exchange device group comprises at least one second heat exchange device;
the intermediate heat exchanger comprises an evaporator and a condenser which are arranged side by side, wherein one of the evaporator and the condenser is connected with the first heat exchange equipment group; the other of the evaporator and the condenser is connected with the second heat exchange equipment group.
2. The heat pump system of claim 1, wherein said first heat exchange unit comprises a first heat exchange unit; the second heat exchange device group comprises a second heat exchange device;
the evaporator is connected with the first heat exchange equipment, and the condenser is connected with the second heat exchange equipment.
3. The heat pump system of claim 2, wherein the first heat exchange device comprises a first compressor, a first four-way valve, a first heat exchanger, and a second heat exchanger;
the first compressor includes a first port and a second port; the first four-way valve comprises a first port, a second port, a third port and a fourth port;
the first port is connected with the first port; the second port is connected with the third port; the second port is connected with the first heat exchanger; the fourth port is connected with the second heat exchanger; the first heat exchanger is connected with the second heat exchanger;
the evaporator comprises a first input end and a first output end, the first input end is connected with the second heat exchanger, and the first output end is connected between the first port and the first port.
4. The heat pump system of claim 3, wherein the heat pump system includes a first mode of operation; in the first operating mode, the second port, the third port, the second port, the first heat exchanger, the second heat exchanger, the fourth port, the first port, and the first port are sequentially communicated to form a first refrigeration circuit.
5. The heat pump system of claim 3, wherein the heat pump system includes a second mode of operation; in the second operation mode, the second port, the third port, the fourth port, the second heat exchanger, the first heat exchanger, the second port, the first port, and the first port are sequentially communicated to form a first heating circuit.
6. The heat pump system of claim 2, wherein the second heat exchange device comprises a second compressor, a second four-way valve, a third heat exchanger, and a fourth heat exchanger;
the second compressor includes a third port and a fourth port; the second four-way valve comprises a fifth port, a sixth port, a seventh port and an eighth port;
the third port is connected with the fifth port; the fourth port is connected with the seventh port; the sixth port is connected with the third heat exchanger; the eighth port is connected with the fourth heat exchanger; the third heat exchanger is connected with the fourth heat exchanger;
the condenser comprises a second input end and a second output end; the second input end is connected with the third port; the second output end is connected with the third heat exchanger.
7. The heat pump system of claim 6, wherein the heat pump system comprises a first mode of operation; in the first operating mode, the third port, the fifth port, the sixth port, the third heat exchanger, the fourth heat exchanger, the eighth port, the seventh port, and the fourth port are sequentially communicated to form a second refrigeration circuit.
8. The heat pump system of claim 6, wherein the heat pump system includes a second mode of operation; in the second operating mode, the third port, the fifth port, the eighth port, the fourth heat exchanger, the third heat exchanger, the sixth port, the seventh port, and the fourth port are sequentially communicated to form a second heating circuit.
9. The heat pump system of claim 2, wherein the first heat exchange device comprises a first compressor, a first four-way valve, a first heat exchanger, and a second heat exchanger;
the first compressor includes a first port and a second port; the first four-way valve comprises a first port, a second port, a third port and a fourth port;
the first port is connected with the first port; the second port is connected with the third port; the second port is connected with the first heat exchanger; the fourth port is connected with the second heat exchanger; the first heat exchanger is connected with the second heat exchanger;
the second heat exchange equipment comprises a second compressor, a second four-way valve, a third heat exchanger and a fourth heat exchanger;
the second compressor includes a third port and a fourth port; the second four-way valve comprises a fifth port, a sixth port, a seventh port and an eighth port;
the third port is connected with the fifth port; the fourth port is connected with the seventh port; the sixth port is connected with the third heat exchanger; the eighth port is connected with the fourth heat exchanger; the third heat exchanger is connected with the fourth heat exchanger;
the heat pump system includes a third mode of operation; in the third operating mode, the second port, the third port, the second port, the first heat exchanger, the second heat exchanger, the fourth port, the first port, and the first port are sequentially communicated to form a first refrigeration circuit; and
the third port, the fifth port, the sixth port, the third heat exchanger, the fourth heat exchanger, the eighth port, the seventh port, and the fourth port are sequentially communicated to form a second refrigeration circuit.
10. The heat pump system of claim 9, wherein the heat pump system includes a fourth mode of operation; in the fourth operating mode, the second port, the third port, the fourth port, the second heat exchanger, the first heat exchanger, the second port, the first port, and the first port are sequentially communicated to form a first heating circuit; and
the third port, the fifth port, the eighth port, the fourth heat exchanger, the third heat exchanger, the sixth port, the seventh port, and the fourth port are sequentially communicated to form a second heating circuit.
11. The heat pump system of claim 9, wherein the heat pump system includes a fifth mode of operation; and in the fifth working mode, the second port, the third port, the fourth port, the second heat exchanger, the evaporator and the first port are sequentially communicated, and the third port, the condenser, the third heat exchanger, the sixth port, the seventh port and the fourth port are sequentially communicated to form a low-temperature heating loop.
12. The heat pump system of claim 9, wherein the first heat exchanger comprises a first port and a second port; the first interface is connected with the second interface; the second heat exchanger comprises a third interface and a fourth interface; the third interface is connected with the fourth interface;
the evaporator comprises a first input end and a first output end, the first input end is connected with the fourth interface, and the first output end is connected between the first port and the first port;
the first heat exchange device further comprises a first expansion device and a second expansion device, wherein the first expansion device is connected between the second port and the fourth port; the second expansion device is connected between the fourth port and the first input.
13. The heat pump system of claim 9, wherein the third heat exchanger comprises a fifth port and a sixth port; the fifth interface is connected with the sixth port; the fourth heat exchanger comprises a seventh interface and an eighth interface; the seventh interface is connected with the eighth port;
the condenser comprises a second input end and a second output end; the second input end is connected with the third port; the second output end is connected with the sixth interface;
said second heat exchange means further comprising a third expansion device and a fourth expansion device, wherein said third expansion device is connected between said fourth heat exchanger and said third heat exchanger; the fourth expansion device is connected between the second output and the third heat exchanger.
14. The heat pump system of claim 13, wherein the second heat exchange device further comprises a first control device and a second control device, wherein the first control device is connected between the third port and the fifth port; the second control device is connected between the third port and the second input terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221273982.8U CN217504035U (en) | 2022-05-24 | 2022-05-24 | Heat pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221273982.8U CN217504035U (en) | 2022-05-24 | 2022-05-24 | Heat pump system |
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| Publication Number | Publication Date |
|---|---|
| CN217504035U true CN217504035U (en) | 2022-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221273982.8U Active CN217504035U (en) | 2022-05-24 | 2022-05-24 | Heat pump system |
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| Country | Link |
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| CN (1) | CN217504035U (en) |
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2022
- 2022-05-24 CN CN202221273982.8U patent/CN217504035U/en active Active
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