CN118776158A - Heat pump system - Google Patents
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- CN118776158A CN118776158A CN202410971242.9A CN202410971242A CN118776158A CN 118776158 A CN118776158 A CN 118776158A CN 202410971242 A CN202410971242 A CN 202410971242A CN 118776158 A CN118776158 A CN 118776158A
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- 238000001816 cooling Methods 0.000 claims description 116
- 239000003507 refrigerant Substances 0.000 claims description 98
- 239000007788 liquid Substances 0.000 claims description 64
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 35
- 239000007789 gas Substances 0.000 description 13
- 230000017525 heat dissipation Effects 0.000 description 9
- 238000000926 separation method Methods 0.000 description 9
- 238000010257 thawing Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The embodiment of the invention discloses a heat pump system, which comprises: a first compressor and a second compressor; the indoor heat exchanger is internally provided with a first indoor flow path and a second indoor flow path, the first plate heat exchanger is internally provided with a first plate exchange flow path and a second plate exchange flow path, and the second plate heat exchanger is internally provided with a third plate exchange flow path and a fourth plate exchange flow path; the first indoor flow path, the first plate exchange flow path, the outdoor heat exchanger and the first compressor are distributed in series, the third plate exchange flow path, the second indoor flow path and the second compressor are distributed in series, and the second plate exchange flow path and the fourth plate exchange flow path are connected in parallel and are respectively and selectively communicated with the geothermal system. The heat pump system provided by the embodiment of the invention can lighten the load of the first compressor, ensure the operation reliability of the first compressor, further prolong the service lives of the first compressor and the second compressor, ensure the indoor heat supply and further ensure the indoor comfort.
Description
Technical Field
The invention relates to the technical field of heat supply, in particular to a heat pump system.
Background
The heat pump is widely used at present, is a mechanical device for forcing heat to flow from a low-temperature object to a high-temperature object in a reverse Carnot cycle mode, mainly comprises a compressor, a condenser, a throttle valve and an evaporator, only consumes a small amount of reverse cycle net work, can obtain larger heat supply, can effectively utilize low-grade heat energy which is difficult to apply, and further achieves the aim of energy conservation.
The existing heat pump system can jointly realize the functions of refrigerating, heating and defrosting the outdoor heat exchanger indoors through the outdoor heat exchanger, the geothermal system, the indoor heat exchanger and the like, but the existing heat pump system is only provided with one centrifugal air-float compressor to participate in all processes, so that the load of the compressor is overweight, oil possibly existing in the flow path can cause the damage of an impeller of the centrifugal air-float compressor, the service life of the compressor is influenced, meanwhile, the indoor heat supply can be influenced when the indoor heat exchanger is defrosted, the compressor is used, and the improvement space exists.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the heat pump system, which can reduce the load of the first compressor, ensure the operation reliability of the first compressor, prolong the service lives of the first compressor and the second compressor, and simultaneously ensure the indoor heat supply and further ensure the indoor comfort.
A heat pump system according to an embodiment of the present invention includes: a first compressor and a second compressor; the indoor heat exchanger is internally provided with a first indoor flow path and a second indoor flow path, the first plate heat exchanger is internally provided with a first plate exchange flow path and a second plate exchange flow path, and the second plate heat exchanger is internally provided with a third plate exchange flow path and a fourth plate exchange flow path; the first indoor flow path, the first plate exchange flow path, the outdoor heat exchanger and the first compressor are distributed in series, the third plate exchange flow path, the second indoor flow path and the second compressor are distributed in series, and the second plate exchange flow path and the fourth plate exchange flow path are connected in parallel and are respectively and selectively communicated with a geothermal system.
According to the heat pump system provided by the embodiment of the invention, the second compressor and the second plate heat exchanger are arranged, so that the second compressor can independently act on the second indoor flow path, the load of the first compressor can be reduced, the refrigerant in the second indoor flow path can be prevented from influencing the operation of the first compressor, the operation reliability of the first compressor is ensured, the service lives of the first compressor and the second compressor can be prolonged, and the first plate heat exchanger and the second plate heat exchanger can be arranged, so that the first compressor and the second compressor can supply heat to the indoor heat exchanger to ensure the indoor heat supply, the indoor comfort level is further ensured, the use effect is better, and the application range is wider.
The heat pump system according to some embodiments of the present invention further comprises a cooling flow path, wherein the cooling flow path is used for introducing a part of refrigerant flowing out of the first compressor into a space where a motor of the first compressor is located and/or a space where a bearing of the first compressor is located.
According to some embodiments of the invention, the cooling flow path comprises a first cooling branch and/or a second cooling branch;
the inlet end of the first cooling branch is communicated between the outdoor heat exchanger and the first compressor or between the first indoor flow path and the first compressor, the outlet end of the first cooling branch is communicated into a space where a bearing of the first compressor is located, the inlet end of the second cooling branch is communicated between the outdoor heat exchanger and the first plate flow path or between the first indoor flow path and the first plate flow path, and the outlet end of the second cooling branch is communicated into a space where a motor of the first compressor is located.
According to some embodiments of the invention, the first cooling branch is provided with a first gas-liquid separator, an intermediate flow path is connected between the upstream of the first gas-liquid separator and the second cooling branch, and the refrigerant in the first cooling branch is suitable for flowing into the second cooling branch through the intermediate flow path.
According to the heat pump system of some embodiments of the present invention, the inlet end of the first compressor is further provided with a second gas-liquid separator, the second gas-liquid separator is connected with a backflow flow path, and the refrigerant cooled by the bearing in the space where the bearing is located and the refrigerant cooled by the motor in the space where the motor is located are suitable for flowing into the second gas-liquid separator from the backflow flow path.
According to some embodiments of the invention, the first cooling branch comprises two first inlet branches, wherein one first inlet branch is communicated between the outdoor heat exchanger and the first compressor, the other first inlet branch is communicated between the first indoor flow path and the first compressor, and a first stop valve is arranged in each first inlet branch;
And/or the second cooling branch comprises two second inlet branches, wherein one second inlet branch is communicated between the outdoor heat exchanger and the first plate exchange flow path, the other second inlet branch is communicated between the first indoor flow path and the first plate exchange flow path, and a second stop valve is arranged in each second inlet branch.
The heat pump system according to some embodiments of the present invention further includes a four-way valve for sequentially communicating the first compressor, the first indoor flow path, the first plate heat exchange flow path, and the outdoor heat exchanger in a refrigerant flow direction or sequentially communicating the first compressor, the outdoor heat exchanger, the first plate heat exchange flow path, and the first indoor flow path in a refrigerant flow direction.
According to the heat pump system of some embodiments of the present invention, a first liquid storage tank and an expansion valve are further disposed between the first indoor flow path and the outdoor heat exchanger.
According to the heat pump system of some embodiments of the present invention, a plurality of heat dissipation fans are arranged on the outer side of the outdoor heat exchanger.
According to the heat pump system of some embodiments of the present invention, the inlet end of the second compressor is provided with a third gas-liquid separator, the third gas-liquid separator is connected between the second plate heat exchanger and the second compressor, and a second liquid storage tank is arranged between the indoor heat exchanger and the second plate heat exchanger.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of a heat pump system according to an embodiment of the invention;
fig. 2 is a schematic structural view of a four-way valve according to an embodiment of the present invention.
Reference numerals:
The heat pump system 100 is configured to provide heat to the heat pump system,
A first compressor 1, a manual butterfly valve 11, an indoor heat exchanger 2, a first indoor flow path 21, a first liquid storage tank 211, an expansion valve 212, a second indoor flow path 22, a third gas-liquid separator 221, a second liquid storage tank 222, a second compressor 223, an outdoor heat exchanger 3, a heat radiation fan 31, a first plate heat exchanger 4, a first plate heat exchange flow path 41, a second plate heat exchange flow path 42, a first electric butterfly valve 421,
A second plate heat exchanger 5, a third plate heat exchange flow path 51, a fourth plate heat exchange flow path 52, a second electric butterfly valve 521, a geothermal system 6, a building water circulation system 7,
The first cooling branch 81, the first gas-liquid separator 811, the first inlet branch 812, the first shutoff valve 813, the second cooling branch 82, the second inlet branch 821, the second shutoff valve 822, the intermediate flow path 83, the return flow path 84, the second gas-liquid separator 841, the liquid mirror 91, the filter 92, the four-way valve 93, the four-way first valve port 931, the four-way second valve port 932, the four-way third valve port 933, the four-way fourth valve port 934, the throttle valve 94, the third shutoff valve 95, the check valve 96, the switch 97, the water pump 98, the drain branch 99, the drain valve 991.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The heat pump system 100 according to the embodiment of the present invention is described below with reference to fig. 1 to 2, which can reduce the load of the first compressor 1, and can ensure the operational reliability of the second compressor 223, and can extend the service lives of the first compressor 1 and the second compressor 223, and at the same time, can ensure the amount of heat supplied to the indoor space, thereby ensuring the indoor comfort.
As shown in fig. 1-2, a heat pump system 100 according to one embodiment of the present invention includes: a first compressor 1, a second compressor 223, an indoor heat exchanger 2, an outdoor heat exchanger 3, a first plate heat exchanger 4 and a second plate heat exchanger 5.
The indoor heat exchanger 2 is provided with a first indoor flow path 21 and a second indoor flow path 22, the first plate heat exchanger 4 is provided with a first plate heat exchanger 41 and a second plate heat exchanger 42, the second plate heat exchanger 5 is provided with a third plate heat exchanger 51 and a fourth plate heat exchanger 52, the first indoor flow path 21, the first plate heat exchanger 41, the outdoor heat exchanger 3 and the first compressor 1 are distributed in series, the third plate heat exchanger 51, the second indoor flow path 22 and the second compressor 223 are distributed in series, and the second plate heat exchanger 42 and the fourth plate heat exchanger 52 are connected in parallel and selectively connected to the geothermal system 6, respectively.
The heat pump is a new energy source, can realize the function of conveying low-temperature heat energy to high-temperature heat energy, so that the heat pump can largely utilize heat in natural resources and waste heat resources, and the driving energy of the heat pump comprises fuel energy, electric energy, heat energy and mechanical energy, thereby effectively saving primary energy required by civil and industry and improving energy conservation and environmental protection.
Specifically, the heat pump system 100 is provided with a first compressor 1 and a second compressor 223, the first compressor 1 may be configured as a centrifugal air-float compressor, an impeller and a diffuser are disposed inside the first compressor, a flow passage is formed between the impeller and the diffuser, the first compressor 1 may be configured to introduce low-temperature low-pressure refrigerant gas into the flow passage, and through centrifugal boosting and speed-reducing diffusion, convert mechanical energy into pressure energy of gas, and further may discharge high-temperature high-pressure refrigerant gas to circulate to each flow passage, and the second compressor 223 may be configured as a scroll compressor or the like.
The heat pump system 100 is also provided with an indoor heat exchanger 2 and an outdoor heat exchanger 3, the indoor heat exchanger 2 can be connected with the building water circulation system 7 and can be used for exchanging heat with the building water circulation system 7, working media circulate in the building water circulation system 7, the building water circulation system 7 is communicated in a building, the building water circulation system 7 can exchange heat with the indoor heat exchanger 2 to refrigerate or supply heat to the building, such as air conditioning and refrigeration in the building or heating and the like, so as to meet the use requirements of users, the building water circulation system 7 is provided with a water pump 98 and a switch 97, the water pump 98 can enable a heat exchange working medium to flow in the building water circulation system 7 so as to supply heat to the indoor uniformly, the switch 97 can be set as a water flow switch so as to control the circulation of the working medium in the building water circulation system 7, different use requirements are met, and the outdoor heat exchanger 3 can exchange heat with the refrigerant so as to absorb or release heat to the refrigerant.
Further, a first indoor flow path 21 and a second indoor flow path 22 are formed in the indoor heat exchanger 2, when the indoor heat exchanger 2 supplies heat to the building water circulation system 7, the outlet end of the first compressor 1 is communicated with the first indoor flow path 21 to supply heat to the building water circulation system 7 through the first indoor flow path 21, the heat-exchanged refrigerant absorbs heat through the outdoor heat exchanger 3 and flows to the inlet end of the first compressor 1, when the indoor heat exchanger 2 cools to the building water circulation system 7, the outlet end of the first compressor 1 is communicated with the outdoor heat exchanger 3, the refrigerant flows to the outdoor heat exchanger 3 and then can release heat to the outdoor heat exchanger 3, and then flows to the first indoor flow path 21 to cool to the building water circulation system 7 through the first indoor flow path 21, and the heat-exchanged refrigerant can flow to the inlet end of the first compressor 1.
In addition, the heat pump system 100 is provided with a first plate heat exchanger 4 and a second plate heat exchanger 5, a first plate heat exchanger 41 and a second plate heat exchanger 42 are formed in the first plate heat exchanger 4, a third plate heat exchanger 51 and a fourth plate heat exchanger 52 are formed in the second plate heat exchanger 5, the first indoor heat exchanger 21, the first plate heat exchanger 41, the outdoor heat exchanger 3 and the first compressor 1 are distributed in series, that is, when the indoor heat exchanger 2 supplies heat to the building water circulation system 7, the outlet end of the first compressor 1 is communicated with the first indoor heat exchanger 21 to supply heat to the building water circulation system 7 through the first indoor heat exchanger 21, and the refrigerant after heat exchange can flow to the first plate heat exchanger 41, the first plate heat exchanger 41 can exchange heat with the second plate heat exchanger 42, and the refrigerant after heat exchange in the first plate heat exchanger 41 continues to flow to the outdoor heat exchanger 3 and flows to the inlet end of the first compressor 1.
When the indoor heat exchanger 2 cools the building water circulation system 7, the outlet end of the first compressor 1 is communicated with the outdoor heat exchanger 3, the refrigerant flows to the outdoor heat exchanger 3 and then can release heat to the outdoor heat exchanger 3, the refrigerant flows to the first plate heat exchange flow path 41, the first plate heat exchange flow path 41 can exchange heat with the second plate heat exchange flow path 42, the refrigerant after heat exchange in the first plate heat exchange flow path 41 continues to flow to the first indoor flow path 21 so as to cool the building water circulation system 7 through the first indoor flow path 21, and the refrigerant after heat exchange can flow to the inlet end of the first compressor 1.
Meanwhile, the third plate exchange flow path 51, the second indoor flow path 22 and the second compressor 223 are distributed in series, namely, the second compressor 223 can convert working medium into high-temperature and high-pressure gas and then exchange heat with the building water circulation system 7 through the second indoor flow path 22 so as to supply heat to the indoor space, when the second plate exchange flow path 42 is connected between the third plate exchange flow path 51 and the second indoor flow path 22 in series, the working medium which exchanges heat with the building water circulation system 7 in the second indoor flow path 22 can flow to the third plate exchange flow path 51, and then exchange heat with the fourth plate exchange flow path 52 through the third plate exchange flow path 51, and the working medium after heat exchange can return to the second compressor 223 through the third plate exchange flow path 51 for compression, so that the second compressor 223 can independently act between the second indoor flow path 22 and the third plate exchange flow path 51, further can reduce the load of the first compressor 1 and the second compressor 223, avoid the influence of the working medium in the second indoor flow path 22 on the first compressor 1, prolong the service life of the first compressor 1 and the second compressor 223, and simultaneously ensure the heat supply capacity of the first compressor 1 and the second compressor 223, and the indoor heat supply capacity of the second compressor 223 can be guaranteed.
And the second plate exchanging flow path 42 and the fourth plate exchanging flow path 52 are connected in parallel and selectively communicated with the geothermal system 6 respectively, namely, the geothermal system 6 can be communicated with the second plate exchanging flow path 42, can be communicated with the fourth plate exchanging flow path 52, can be simultaneously communicated with the second plate exchanging flow path 42 and the fourth plate exchanging flow path 52, when the geothermal system 6 is communicated with the second plate exchanging flow path 42, the first plate exchanging flow path 41 can exchange heat with the second plate exchanging flow path 42, and then can release heat into the geothermal system 6 through the second plate exchanging flow path 42, and when the geothermal system 6 is communicated with the fourth plate exchanging flow path 52, the third plate exchanging flow path 51 can exchange heat with the fourth plate exchanging flow path 52, and then can release heat in the geothermal system 6 into the second indoor flow path 22 to supply heat indoors through the second indoor flow path 22, so that energy sources can be reasonably utilized, different use requirements can be met, and the geothermal system is energy-saving and environment-friendly.
The geothermal system 6 uniformly heats the whole ground through the heat medium in the floor radiation layer, and can utilize the heat accumulation of the ground and the heat radiating upward rule of the ground to conduct from bottom to top, so that heating can be performed, namely, the heat pump system 100 can utilize the heat in the geothermal system 6, the energy consumption of the heat pump system 100 is reduced, working media also circulate in the geothermal system 6, the working media can be the same as the working media in the building water circulation system 7 or different types, a water pump 98, a one-way valve 96, a switch 97, a second electric butterfly valve 521 and the like are arranged in the fourth plate change flow path 52, a first electric butterfly valve 421, a one-way valve 96 and the like are arranged in the second plate change flow path 42, the water pump 98 can enable the working media to flow in the fourth plate change flow path 52 to continuously exchange heat with the geothermal system 6, and the switch 97 can be set as a water flow switch, so that the circulation of the working media in the fourth plate change flow path 52 is controlled, and different use requirements are met.
According to the heat pump system 100 of the embodiment of the invention, the second compressor 223 and the second plate heat exchanger 5 are arranged, so that the second compressor 223 can independently act on the second indoor flow path 22, further, the load of the first compressor 1 can be reduced, the refrigerant in the second indoor flow path 22 can be prevented from influencing the operation of the first compressor 1, the operation reliability of the first compressor 1 is ensured, the service lives of the first compressor 1 and the second compressor 223 can be prolonged, and the first compressor 1 and the second compressor 223 can supply heat to the indoor heat exchanger 2 through the arrangement of the first plate heat exchanger 4 and the second plate heat exchanger 5, so that the indoor heat supply amount is ensured, the indoor comfort is further ensured, the use effect is better, and the application range is wider.
In some embodiments, the heat pump system 100 further includes a cooling flow path for introducing a portion of the refrigerant flowing out of the first compressor 1 into a space in which the motor of the first compressor 1 is located and/or a space in which the bearing of the first compressor 1 is located.
Specifically, as shown in fig. 1, the heat pump system 100 is further provided with a cooling flow path, in which a throttle valve 94, a filter 92 and the like are provided, and a part of the refrigerant flowing out of the first compressor 1 may flow into the cooling flow path, and a part of the refrigerant flowing through the outdoor heat exchanger 3 may also flow into the cooling flow path, and after the refrigerant is converted into low-temperature low-pressure gas by the throttle valve 94, impurities may be filtered by the filter 92.
Further, the other end of the cooling flow path may be communicated with the space where the motor of the first compressor 1 is located and/or the space where the bearing of the first compressor 1 is located, that is, the other end of the cooling flow path may be communicated with the space where the motor of the first compressor 1 is located, or may be communicated with the space where the bearing of the first compressor 1 is located, or may be communicated with both the space where the motor of the first compressor 1 is located and the space where the bearing of the first compressor 1, in this embodiment, as shown in fig. 1, the other end of the cooling flow path is communicated with both the space where the motor of the first compressor 1 and the space where the bearing of the first compressor 1 is located, so that the filtered low-temperature low-pressure gas refrigerant may cool down the motor and the bearing, thereby avoiding the occurrence of overheat or the like of the first compressor 1, ensuring the running stability of the first compressor 1, and prolonging the service life of the first compressor 1.
In some embodiments, the cooling flow path includes a first cooling leg 81 and/or a second cooling leg 82; the inlet end of the first cooling branch 81 is connected between the outdoor heat exchanger 3 and the first compressor 1 or between the first indoor flow path 21 and the first compressor 1, the outlet end of the first cooling branch 81 is connected to the space where the bearing of the first compressor 1 is located, the inlet end of the second cooling branch 82 is connected between the outdoor heat exchanger 3 and the first plate flow path 41 or between the first indoor flow path 21 and the first plate flow path 41, and the outlet end of the second cooling branch 82 is connected to the space where the motor of the first compressor 1 is located.
Specifically, as shown in fig. 1, the cooling flow path is provided with a first cooling branch 81 and/or a second cooling branch 82, that is, the cooling flow path may be provided with only the first cooling branch 81, may be provided with only the second cooling branch 82, and may also be provided with both the first cooling branch 81 and the second cooling branch 82.
Further, when the inlet end of the first cooling branch 81 is connected between the outdoor heat exchanger 3 and the first compressor 1 or between the first indoor flow path 21 and the first compressor 1, the refrigerant at the outlet end of the first compressor 1 flows into the outdoor heat exchanger 3 and can flow into the first cooling branch 81 through the inlet end of the first cooling branch 81 before flowing into the outdoor heat exchanger 3, the residual refrigerant continues to flow after exchanging heat with the outdoor heat exchanger 3, and when the inlet end of the first cooling branch 81 is connected between the first indoor flow path 21 and the first compressor 1, the refrigerant at the outlet end of the first compressor 1 flows into the first indoor flow path 21 and can flow into the first cooling branch 81 through the inlet end of the first cooling branch 81 before flowing into the first indoor flow path 21 for heat exchange, and the residual refrigerant continues to flow after exchanging heat with the building water circulation system 7 through the first indoor flow path 21.
And the outlet end of the first cooling branch 81 is communicated to the space where the bearing of the first compressor 1 is located, namely, the refrigerant flowing through the first cooling branch 81 can flow to the space where the bearing of the first compressor 1 is located, so that the bearing can be cooled, and the running reliability of the bearing is ensured.
Meanwhile, the inlet end of the second cooling branch 82 is connected between the outdoor heat exchanger 3 and the first plate heat exchange flow path 41 or between the first indoor flow path 21 and the first plate heat exchange flow path 41, when the inlet end of the second cooling branch 82 is connected between the outdoor heat exchanger 3 and the first plate heat exchange flow path 41, the refrigerant at the outlet end of the first compressor 1 flows into the outdoor heat exchanger 3, after heat exchange by the outdoor heat exchanger 3, can flow into the second cooling branch 82 through the inlet end of the second cooling branch 82, the rest refrigerant continues to flow into the first plate heat exchange flow path 41 for heat exchange, and when the inlet end of the second cooling branch 82 is connected between the first indoor flow path 21 and the first plate heat exchange flow path 41, the refrigerant at the outlet end of the first compressor 1 flows into the first indoor flow path 21, and after heat exchange by the first indoor flow path 21, can flow into the second cooling branch 82 through the inlet end of the second cooling branch 82, and the rest refrigerant can continue to flow into the first plate heat exchange flow path 41 for heat exchange.
And the outlet end of the second cooling branch 82 is communicated to the space where the motor of the first compressor 1 is located, namely, the refrigerant flowing through the second cooling branch 82 can flow to the space where the motor of the first compressor 1 is located, so that the motor can be cooled, and the operation reliability of the motor is ensured.
In some embodiments, a first gas-liquid separator 811 is provided in the first cooling branch 81, the first cooling branch 81 is connected with an intermediate flow path 83 between the upstream of the first gas-liquid separator 811 and the second cooling branch 82, and the refrigerant in the first cooling branch 81 is adapted to flow into the second cooling branch 82 through the intermediate flow path 83.
Specifically, the inlet end of the first cooling branch 81 is connected between the outdoor heat exchanger 3 and the first compressor 1 or between the first indoor flow path 21 and the first compressor 1, and the outlet end is connected to the space where the bearing of the first compressor 1 is located, so that the bearing of the first compressor 1 can be cooled by the first cooling branch 81, and the operation reliability of the first compressor 1 is ensured.
As shown in fig. 1, a first gas-liquid separator 811 is disposed in the first cooling branch 81, and a throttle valve 94 is disposed downstream of the first gas-liquid separator 811, so that the first gas-liquid separator 811 can separate the refrigerant, and further ensure that the refrigerant flowing into the space of the first compressor 1 through the first cooling branch 81 is gaseous, and after the refrigerant is converted into low-temperature and low-pressure gas through the throttle valve 94, the refrigerant can be filtered by the filter 92 and then cooled, thereby ensuring the cooling reliability and the running stability of the bearing.
Further, as shown in fig. 1, the first cooling branch 81 is connected with the intermediate flow path 83 between the upstream of the first gas-liquid separator 811 and the second cooling branch 82, the refrigerant in the first cooling branch 81 is suitable for flowing into the second cooling branch 82 through the intermediate flow path 83, that is, before flowing into the first gas-liquid separator 811, part of the refrigerant in the first cooling branch 81 can flow into the intermediate flow path 83, and the second cooling branch 82 is communicated with the intermediate flow path 83, so that the refrigerant in the intermediate flow path 83 can be mixed with the refrigerant in the second cooling branch 82 and then flows into the space where the motor of the first compressor 1 is located, the intermediate flow path 83 is provided with the throttle valve 94, the refrigerant after the intermediate flow path 83 passes through the throttle valve 94 becomes low-temperature low-pressure superheated gas, the refrigerant after the second cooling branch 82 passes through the throttle valve 94 becomes low-temperature low-pressure two-phase state, the superheated gas and the low-temperature low-pressure superheated gas after being exchanged with the low-temperature low-pressure liquid are filtered by the filter 92, and the cooled motor is cooled after being filtered, the reliability and stability of the operation are guaranteed.
In some embodiments, the inlet end of the first compressor 1 is further provided with a second gas-liquid separator 841, and the second gas-liquid separator 841 is connected to a return flow path 84, and the refrigerant cooled by the bearing in the space where the bearing is located and the refrigerant cooled by the motor in the space where the motor is located are adapted to flow from the return flow path 84 to the second gas-liquid separator 841.
Specifically, as shown in fig. 1, the inlet end of the first compressor 1 is further provided with a second gas-liquid separator 841, the second gas-liquid separator 841 can perform gas-liquid separation on the refrigerant flowing into the first compressor 1, so as to ensure the operation reliability of the first compressor 1, and the second gas-liquid separator 841 is connected with a backflow flow path 84, that is, the outlet end of the backflow flow path 84 is connected with the second gas-liquid separator 841, so that the refrigerant in the backflow flow path 84 can flow into the first compressor 1 after gas-liquid separation through the second gas-liquid separator 841, after the refrigerant flows into the bearing of the first compressor 1 through the first cooling branch 81, the bearing can enter the backflow flow path 84 through the inlet end of the backflow flow path 84, and after the refrigerant flows into the motor of the first compressor 1 through the second cooling branch 82, the refrigerant can also enter the backflow flow path 84 through the inlet end of the backflow flow path 84, so as to ensure the gas-liquid separation through the backflow flow path 84, so as to ensure the refrigerant to flow into the first compressor 1, and ensure the operation reliability of the refrigerant is guaranteed, and the cost is saved.
Further, when the heat pump system 100 is in the defrosting mode, the outlet end of the first compressor 1 is communicated with the outdoor heat exchanger 3, so that the refrigerant can circulate to the outdoor heat exchanger 3, the refrigerant can exchange heat with the outdoor heat exchanger 3, and further defrost the outdoor heat exchanger 3, and the exchanged refrigerant can circulate to the space where the motor of the first compressor 1 is located through the second cooling branch 82, so as to cool the motor, the cooled refrigerant circulates to the second gas-liquid separator 841 through the return flow path 84, and then circulates back to the first compressor 1 for compression after gas-liquid separation, at this time, the outlet end of the second compressor 223 is communicated with the second indoor flow path 22, so that the refrigerant can supply heat indoors through the second indoor flow path 22, and further can ensure indoor heat supply while defrosting the outdoor heat exchanger 3, ensuring indoor comfort, and the second indoor flow path 22 is further provided with a throttle 94 and the like.
The second plate exchange flow path 42 is further provided with a drainage branch 99, the drainage branch 99 is provided with a drainage valve 991, the drainage valve 991 can be set as a centrifugal refrigeration drainage valve, and then medium flowing in the second plate exchange flow path 42, the fourth plate exchange flow path 52 and the geothermal system 6 can be drained through the drainage branch 99, so that the first plate heat exchanger 4 and the second plate heat exchanger 5 can be prevented from being frozen out under the condition of low temperature, the use reliability of the first plate heat exchanger 4 and the second plate heat exchanger 5 is ensured, and the service life of the first plate heat exchanger 4 and the second plate heat exchanger 5 is prolonged.
In some embodiments, the first cooling branch 81 comprises two first inlet branches 812, wherein one first inlet branch 812 communicates between the outdoor heat exchanger 3 and the first compressor 1, wherein the other first inlet branch 812 communicates between the first indoor flow path 21 and the first compressor 1, and wherein a first shut-off valve 813 is provided in each first inlet branch 812.
Specifically, as shown in fig. 1, the cooling flow path is provided with a first cooling branch 81 and a second cooling branch 82, and the first cooling branch 81 is provided with two first inlet branches 812, wherein one first inlet branch 812 is communicated between the outdoor heat exchanger 3 and the first compressor 1, at this time, the refrigerant at the outlet end of the first compressor 1 flows into the outdoor heat exchanger 3, and before flowing into the outdoor heat exchanger 3, the refrigerant can flow into the first cooling branch 81 through the first inlet branch 812, the rest refrigerant continues to flow after exchanging heat with the outdoor heat exchanger 3, wherein the other first inlet branch 812 is communicated between the first indoor flow path 21 and the first compressor 1, at this time, the refrigerant at the outlet end of the first compressor 1 flows into the first indoor flow path 21, and before flowing into the first indoor flow path 21 for heat exchange, the rest refrigerant can flow into the first cooling branch 81 through the first indoor flow path 21 and the building water circulation system 7, and then continues to flow.
Further, the two first inlet branches 812 can be both communicated with the outlet end of the first cooling branch 81, and the outlet end of the first cooling branch 81 is communicated to the space where the bearing of the first compressor 1 is located, that is, the refrigerant flowing through the first cooling branch 81 can flow to the space where the bearing of the first compressor 1 is located, so that the bearing can be cooled down and cooled down, the running reliability of the bearing is ensured, and each first inlet branch 812 is provided with a first stop valve 813, and the communication of the two first inlet branches 812 can be controlled through each first stop valve 813 respectively, so that the use flexibility is improved.
And/or the second cooling branch 82 includes two second inlet branches 821, one of which second inlet branch 821 communicates between the outdoor heat exchanger 3 and the first plate exchanging flow path 41, and the other of which second inlet branch 821 communicates between the first indoor flow path 21 and the first plate exchanging flow path 41, and a second shut-off valve 822 is provided in each of the second inlet branches 821.
Specifically, as shown in fig. 1, the cooling flow path is provided with a first cooling branch 81 and a second cooling branch 82, and the second cooling branch 82 is provided with two second inlet branches 821, wherein one of the second inlet branches 821 is communicated between the outdoor heat exchanger 3 and the first plate heat exchange flow path 41, at this time, the refrigerant at the outlet end of the first compressor 1 flows into the outdoor heat exchanger 3, and after exchanging heat with the outdoor heat exchanger 3, can flow into the second cooling branch 82 through the second inlet branch 821, and the remaining refrigerant can flow into the first plate heat exchange flow path 41 for heat exchange, wherein the other second inlet branch 821 is communicated between the first indoor flow path 21 and the first plate heat exchange flow path 41, at this time, the refrigerant at the outlet end of the first compressor 1 flows into the first indoor flow path 21, and after flowing into the first indoor flow path 21 for heat exchange, can flow into the second cooling branch 821 through the second inlet branch 82, and the remaining refrigerant continues to flow into the first plate heat exchange flow path 41 for heat exchange.
Further, the two second inlet branches 821 can be both communicated with the outlet end of the second cooling branch 82, and the outlet end of the second cooling branch 82 is communicated to the space where the motor of the second compressor 223 is located, that is, the refrigerant flowing through the second cooling branch 82 can flow to the space where the motor of the second compressor 223 is located, so that the motor can be cooled down and cooled down, the operation reliability of the motor is ensured, and each second inlet branch 821 is provided with a second stop valve 822, and the communication of the two second inlet branches 821 can be controlled respectively through each second stop valve 822, so that the two second inlet branches 821 can be selectively communicated under the conditions of a refrigerating mode, a heating mode or a defrosting mode, and the like, thereby improving the use flexibility.
In some embodiments, the heat pump system 100 further includes a four-way valve 93, and the four-way valve 93 is used to sequentially communicate the first compressor 1, the first indoor flow path 21, the first plate heat exchanger flow path 41, and the outdoor heat exchanger 3 in the refrigerant flow direction or sequentially communicate the first compressor 1, the outdoor heat exchanger 3, the first plate heat exchanger flow path 41, and the first indoor flow path 21 in the refrigerant flow direction.
Specifically, as shown in fig. 1, the heat pump system 100 is further provided with a four-way valve 93, where the four-way valve 93 is disposed between the first compressor 1 and the outdoor heat exchanger 3 and the indoor heat exchanger 2, so that the four-way valve 93 can sequentially communicate the first compressor 1, the first indoor flow path 21, the first plate heat exchanger 41 and the outdoor heat exchanger 3 along the refrigerant flow direction or sequentially communicate the first compressor 1, the outdoor heat exchanger 3, the first plate heat exchanger 41 and the first indoor flow path 21 along the refrigerant flow direction, when the heat pump system 100 supplies heat indoors, the four-way valve 93 can sequentially communicate the first compressor 1, the first indoor flow path 21, the first plate heat exchanger 41 and the outdoor heat exchanger 3 along the refrigerant flow direction, and when the heat pump system 100 performs refrigeration indoors, the four-way valve 93 can sequentially communicate the first compressor 1, the outdoor heat exchanger 3, the first plate heat exchanger 41 and the first indoor flow path 21 along the refrigerant flow direction, so as to meet different requirements, and simplify the arrangement of pipelines, save the arrangement, facilitate the later-stage maintenance, and improve the integration of the heat pump system 100.
Further, as shown in fig. 2, the four-way valve 93 is provided with a four-way first port 931, a four-way second port 932, a four-way third port 933 and a four-way fourth port 934, an outlet port of the first compressor 1 is communicated with the four-way fourth port 934, an inlet port of the first compressor 1 is communicated with the four-way second port 932, the outdoor heat exchanger 3 is communicated with the four-way first port 931, the first indoor flow path 21 and the four-way third port 933 are communicated, that is, when the heat pump system 100 supplies heat indoors, the refrigerant flows through the four-way fourth port 934 to the four-way third port 933, then flows to the first indoor flow path 21, and after heat exchange, flows to the first plate heat exchange flow path 41, flows through the first plate heat exchange flow path 41 to the outdoor heat exchanger 3, then flows through the four-way first port 931 to the four-way second port 932, and flows back to the first compressor 1.
When the heat pump system 100 is refrigerating indoors, the refrigerant flows through the fourth port 934 to the first port 931, further flows to the outdoor heat exchanger 3, exchanges heat with the outdoor heat exchanger 3, then flows to the first plate heat exchange flow path 41, further flows to the first indoor flow path 21, exchanges heat, then flows through the third port 933 to the second port 932, and flows back to the first compressor 1, and when the heat pump system 100 is defrosting, the refrigerant flows through the fourth port 934 to the first port 931, further flows to the outdoor heat exchanger 3, exchanges heat through the outdoor heat exchanger 3, then flows through the second cooling branch 82 to the space where the motor of the first compressor 1 is located, and further flows through the return flow path 84 to the inlet end of the first compressor 1.
In some embodiments, a first liquid storage tank 211 and an expansion valve 212 are further provided between the first indoor flow path 21 and the outdoor heat exchanger 3.
Specifically, as shown in fig. 1, a first liquid storage tank 211 and an expansion valve 212 are further disposed between the first indoor flow path 21 and the outdoor heat exchanger 3, the expansion valve 212 is a VPF expansion valve, the refrigerant flows from the outlet end of the first compressor 1 to the four-way valve 93, and then flows to the first indoor flow path 21 through the four-way valve 93, heat exchange is performed between the first indoor flow path 21 and the building water circulation system 7 to supply heat to the room, the refrigerant after heat exchange can flow to the expansion valve 212, the refrigerant after heat exchange can be filtered by the filter 92 and then flows to the first plate exchange flow path 41, the refrigerant flows to the first liquid storage tank 211 through the first plate exchange flow path 41 for gas-liquid separation, so that the liquid is reserved in the first liquid storage tank 211, and the residual refrigerant flows to the outdoor heat exchanger 3 and then flows back to the first compressor 1.
Further, when the heat pump system 100 performs cooling, the refrigerant flows from the outlet end of the first compressor 1 to the four-way valve 93, further flows to the outdoor heat exchanger 3 through the four-way valve 93, is subjected to gas-liquid separation by the first liquid storage tank 211 after passing through the outdoor heat exchanger 3, and flows to the first plate heat exchange flow path 41, further flows to the expansion valve 212, and can flow to the first indoor flow path 21 to exchange heat with the building water circulation system 7 after passing through the expansion valve 212, so as to perform cooling in the room, and the refrigerant after heat exchange can continue to flow to return to the first compressor 1.
And still be provided with a plurality of sight glass 91, check valve 96 and third stop valve 95 etc. in heat pump system 100, sight glass 91 can real-time supervision each flow path in refrigerant volume to in time supply refrigerant to the flow path, guarantee heat pump system 100 operational reliability, and check valve 96 and third stop valve 95 can guarantee each flow path operational reliability, make the refrigerant flow as required, still be provided with manual butterfly valve 11 and switch 97 etc. around first compressor 1, manual butterfly valve 11 can manual control the break-make of first compressor 1 flow path, improve the flexibility of use, and switch 97 can be set to low-voltage switch or high-voltage switch etc. guarantee heat pump system 100 operational stability.
In some embodiments, a plurality of heat dissipation fans 31 are arranged on the outer side of the outdoor heat exchanger 3, as shown in fig. 1, the heat dissipation fans 31 are arranged on the outer side of the outdoor heat exchanger 3, and can be arranged as fans, so that air around the outdoor heat exchanger 3 can be driven to circulate through the operation of the heat dissipation fans 31, the outdoor heat exchanger 3 is further cooled, the operation reliability of the outdoor heat exchanger 3 is ensured, the plurality of heat dissipation fans 31 are arranged in a plurality, the plurality of heat dissipation fans 31 are distributed on the outer side of the outdoor heat exchanger 3 at intervals, and further, the heat dissipation and the cooling of the outdoor heat exchanger 3 can be performed everywhere, when the refrigerant in the first compressor 1 circulates to the outdoor heat exchanger 3 for heat exchange through the four-way valve 93, the operation temperature of the outdoor heat exchanger 3 is increased, the heat dissipation fans can be started at the moment, and when the outdoor environment temperature is lower, the heat dissipation fans can be also turned off, so that energy sources can be saved, and the use flexibility is improved.
In some embodiments, the inlet end of the second compressor 223 is provided with a third gas-liquid separator 221, the third gas-liquid separator 221 is connected between the second plate heat exchanger 5 and the second compressor 223, and a second liquid storage tank 222 is provided between the indoor heat exchanger 2 and the second plate heat exchanger 5.
Specifically, as shown in fig. 1, the heat pump system 100 is provided with a second compressor 223, the second compressor 223 is connected in series with the second indoor flow path 22, that is, the second compressor 223 can convert the working medium into high-temperature and high-pressure gas, and then exchange heat with the building water circulation system 7 through the second indoor flow path 22, so as to supply heat to the indoor space, and when the third plate exchange flow path 51 is connected in series between the second compressor 223 and the second indoor flow path 22, the working medium after heat exchange with the building water circulation system 7 in the second indoor flow path 22 can flow to the third plate exchange flow path 51, and then exchange heat with the fourth plate exchange flow path 52 through the third plate exchange flow path 51, so as to absorb the heat of the geothermal system 6, and the inlet end of the second compressor 223 is further provided with a third gas-liquid separator 221, that is, and the medium after heat exchange with the building water circulation system 7 in the second indoor flow path 22 can be separated into pure gas through the third gas-liquid separator 221, so that the medium entering the second compressor 223 is ensured to be the running reliability of the second compressor 223.
Further, the second compressor 223 may act on the second indoor flow path 22 alone, so as to reduce the load of the first compressor 1, prolong the service life of the first compressor 1, and the first compressor 1 or the second compressor 223 may supply heat to the indoor heat exchanger 2, so as to ensure indoor heat supply and indoor comfort, meanwhile, a second liquid storage tank 222 is disposed between the indoor heat exchanger 2 and the second plate heat exchanger 5, that is, a medium in the second indoor flow path 22 after heat exchange with the building water circulation system 7 may flow through the second liquid storage tank 222 for gas-liquid separation, and the medium after gas-liquid separation flows to the third gas-liquid separator 221 through the third plate heat exchange flow path 51 for gas-liquid separation again, so as to further ensure that the medium entering the second compressor 223 is pure gas, so as to ensure the operation reliability of the second compressor 223.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A heat pump system, comprising:
A first compressor and a second compressor;
The indoor heat exchanger is internally provided with a first indoor flow path and a second indoor flow path, the first plate heat exchanger is internally provided with a first plate exchange flow path and a second plate exchange flow path, and the second plate heat exchanger is internally provided with a third plate exchange flow path and a fourth plate exchange flow path;
The first indoor flow path, the first plate exchange flow path, the outdoor heat exchanger and the first compressor are distributed in series, the third plate exchange flow path, the second indoor flow path and the second compressor are distributed in series, and the second plate exchange flow path and the fourth plate exchange flow path are connected in parallel and are respectively and selectively communicated with a geothermal system.
2. The heat pump system of claim 1, further comprising a cooling flow path for passing a portion of the refrigerant flowing out of the first compressor into a space in which a motor of the first compressor is located and/or into a space in which a bearing of the first compressor is located.
3. The heat pump system of claim 2, wherein the cooling flow path comprises a first cooling branch and/or a second cooling branch;
the inlet end of the first cooling branch is communicated between the outdoor heat exchanger and the first compressor or between the first indoor flow path and the first compressor, the outlet end of the first cooling branch is communicated into a space where a bearing of the first compressor is located, the inlet end of the second cooling branch is communicated between the outdoor heat exchanger and the first plate flow path or between the first indoor flow path and the first plate flow path, and the outlet end of the second cooling branch is communicated into a space where a motor of the first compressor is located.
4. A heat pump system according to claim 3, wherein a first gas-liquid separator is provided in the first cooling branch, the first cooling branch being connected with an intermediate flow path between the upstream of the first gas-liquid separator and the second cooling branch, the refrigerant in the first cooling branch being adapted to flow into the second cooling branch through the intermediate flow path.
5. The heat pump system according to claim 4, wherein the inlet end of the first compressor is further provided with a second gas-liquid separator, the second gas-liquid separator is connected with a return flow path, and the refrigerant cooled by the bearing in the space where the bearing is located and the refrigerant cooled by the motor in the space where the motor is located are adapted to flow from the return flow path to the second gas-liquid separator.
6. A heat pump system according to claim 3, wherein the first cooling branch comprises two first inlet branches, one of which is connected between the outdoor heat exchanger and the first compressor, and the other of which is connected between the first indoor flow path and the first compressor, and a first shut-off valve is provided in each of the first inlet branches;
And/or the second cooling branch comprises two second inlet branches, wherein one second inlet branch is communicated between the outdoor heat exchanger and the first plate exchange flow path, the other second inlet branch is communicated between the first indoor flow path and the first plate exchange flow path, and a second stop valve is arranged in each second inlet branch.
7. The heat pump system according to claim 1, further comprising a four-way valve for sequentially communicating the first compressor, the first indoor flow path, the first plate heat exchanger flow path, and the outdoor heat exchanger in a refrigerant flow direction or sequentially communicating the first compressor, the outdoor heat exchanger, the first plate heat exchanger flow path, and the first indoor flow path in a refrigerant flow direction.
8. The heat pump system according to claim 1, wherein a first liquid storage tank and an expansion valve are further provided between the first indoor flow path and the outdoor heat exchanger.
9. The heat pump system of claim 1, wherein a plurality of heat dissipating fans are provided outside the outdoor heat exchanger.
10. The heat pump system of claim 1, wherein the inlet end of the second compressor is provided with a third gas-liquid separator, the third gas-liquid separator is connected between the second plate heat exchanger and the second compressor, and a second liquid storage tank is provided between the indoor heat exchanger and the second plate heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410971242.9A CN118776158A (en) | 2024-07-18 | 2024-07-18 | Heat pump system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410971242.9A CN118776158A (en) | 2024-07-18 | 2024-07-18 | Heat pump system |
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| CN118776158A true CN118776158A (en) | 2024-10-15 |
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| CN202410971242.9A Pending CN118776158A (en) | 2024-07-18 | 2024-07-18 | Heat pump system |
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| CN (1) | CN118776158A (en) |
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