CN212057819U - Heat pump system - Google Patents
Heat pump system Download PDFInfo
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- CN212057819U CN212057819U CN202020279785.1U CN202020279785U CN212057819U CN 212057819 U CN212057819 U CN 212057819U CN 202020279785 U CN202020279785 U CN 202020279785U CN 212057819 U CN212057819 U CN 212057819U
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Abstract
The utility model provides a heat pump system. The heat pump system comprises a first three-way valve and a second three-way valve, wherein the first three-way valve is communicated with a first heat exchanger on the outdoor side through a first port to form a first shunting branch, the second three-way valve is communicated with a second heat exchanger on the outdoor side through a fourth port to form a second shunting branch, one end of the first shunting branch is connected with an exhaust port of a compressor after the first shunting branch is connected with the second shunting branch in parallel, the other end of the first shunting branch is connected with an air suction port of the compressor after the first shunting branch is connected with the second shunting branch in parallel, the third port is communicated with a sixth port to form a bridge flow path, and the exhaust port of the compressor is connected with the bridge flow path sequentially through an indoor side heat exchanger and. According to the utility model discloses a heat pump system, system architecture is simpler, and valve circuit control logic is more simplified.
Description
Technical Field
The utility model belongs to the technical field of air conditioning, concretely relates to heat pump system.
Background
When the heat pump air conditioner operates under a low-temperature working condition, the outer machine heat exchanger can be frosted, so that the heating capacity of the air conditioner is reduced, and the outer machine heat exchanger of the air conditioner needs to be defrosted. The most widely adopted defrosting mode at present is to switch the working mode of a heat pump system from a heating mode to a cooling mode so as to utilize high-temperature exhaust of a compressor to defrost a frosted outdoor heat exchanger, but the mode can cause large temperature fluctuation at the indoor side and seriously reduce the use experience of users; based on the defects of the mode, in the prior art, an independent electric heating component is adopted to defrost the heat exchanger at the outdoor side, but in the mode, the electric heating component needs to be powered by strong electricity, and the outdoor unit is installed at the outdoor side, so that great potential safety hazards exist. Therefore, the defrosting mode of the double heat exchangers (evaporators) brings extensive attention in the industry, the defrosting mode of the double heat exchangers refers to that two heat exchangers are arranged on the outdoor side in the heat pump system, one of the two heat exchangers is connected in series in an indoor heating cycle, the other heat exchanger is connected in series with a high-temperature exhaust port of the compressor to realize defrosting operation of the compressor, the indoor heat exchanger is still in a heating mode, namely the defrosting operation does not cause fluctuation of indoor temperature, so that the use experience of users is improved, but the current corresponding system is mainly constructed by adopting a four-way valve or a plurality of electromagnetic valves in series-parallel connection, the heat pump system constructed in the mode realizes the functions, but the defects of complex system and complex valve path control logic exist, and the utility model is provided based on the above.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the present invention is to provide a heat pump system, the system structure is simpler, and the valve control logic is more simplified.
In order to solve the problem, the utility model provides a heat pump system, including first three-way valve spare, second three-way valve spare, first three-way valve spare, second three-way valve spare have first mouthful, second mouth, third mouth, fourth mouth, fifth mouth, the sixth mouth that alternative link up respectively, first three-way valve spare passes through first mouthful forms first reposition of redundant personnel branch with the first heat exchanger intercommunication in outdoor side, second three-way valve spare forms second reposition of redundant personnel branch through fourth mouth and outdoor side second heat exchanger intercommunication, first reposition of redundant personnel branch with the parallelly connected back one end of second reposition of redundant personnel branch is connected with the gas vent of compressor, first reposition of redundant personnel branch with the parallelly connected back other end of second reposition of redundant personnel branch with the induction port connection of compressor, the third mouth with sixth mouth through connection forms the bridge flow path, the gas vent of compressor still loops through indoor side heat exchanger, the indoor side heat exchanger, A first throttling element is connected with the bridge flow path.
Preferably, the first three-way valve member comprises a first three-way valve and/or the second three-way valve member comprises a second three-way valve.
Preferably, the first three-way valve member includes a first split two-way valve and a first bridge two-way valve, the first split two-way valve and the first bridge two-way valve are connected in series to form the first three-way valve member, and/or the second three-way valve member includes a second split two-way valve and a second bridge two-way valve, and the second split two-way valve and the second bridge two-way valve are connected in series to form the second three-way valve member.
Preferably, a second throttling element is further connected in series to the first branch path, and the outdoor side first heat exchanger is located between the second throttling element and the first three-way valve; and/or a third throttling element is further connected in series to the second branch path, and the second heat exchanger on the outdoor side is located between the third throttling element and the second three-way valve.
Preferably, the heat pump system further includes a four-way valve having a seventh port, an eighth port, a ninth port, and a tenth port, which are selectively communicated, the seventh port is connected to the indoor-side heat exchanger, the eighth port is connected to the exhaust port of the compressor, the ninth port is connected to the other end of the first and second branch paths after being connected in parallel, and the tenth port is connected to the suction port of the compressor.
Preferably, the heat pump system further includes an electric heating device disposed at the indoor-side heat exchanger.
Preferably, the indoor side heat exchanger is a fin-tube heat exchanger or a microchannel heat exchanger; and/or the first heat exchanger at the outdoor side is a tube fin type heat exchanger or a micro-channel heat exchanger; and/or the second heat exchanger on the outdoor side is a tube fin heat exchanger or a micro-channel heat exchanger.
The utility model provides a pair of heat pump system, through first tee bend valve member, second tee bend valve member form parallelly connected first reposition of redundant personnel branch road, second reposition of redundant personnel branch road and the cross-bridge flow path, thereby make heat pump system when the mode of heating is being operated, can switch on through the selectivity first tee bend valve member and second tee bend valve member's corresponding port is right one among the first heat exchanger of outdoor side or the second heat exchanger of outdoor side realizes the defrosting, and need not heat pump system and switched to the mode of cooling by the mode of heating, and then guaranteed the stability of indoor side temperature, improves user's comfort level, and the combination of cross valve or other various valve members among the prior art is no longer adopted to the system construction among this technical scheme, and adopts the tee bend valve member that the structure is simpler, guarantees when heat pump system has aforementioned heating and defrosting effect, system structure is simpler, The valve block control logic is more simplified.
Drawings
Fig. 1 is a system schematic diagram of a heat pump system according to an embodiment of the present invention;
fig. 2 is a schematic view of a refrigerant flow direction of a first heat exchanger outside a heat pump system in a defrosting condition according to an embodiment of the present invention;
fig. 3 is a schematic view of a refrigerant flow direction of the second heat exchanger outside the heat pump system in the defrosting condition according to the embodiment of the present invention;
fig. 4 is a schematic diagram of a refrigerant flow direction of the heat pump system according to the embodiment of the present invention under a heating condition;
fig. 5 is a system schematic diagram of a heat pump system according to another embodiment of the present invention.
The reference numerals are represented as:
1. a compressor; 2. an indoor-side heat exchanger; 3. a first throttling element; 41. a first three-way valve element; 411. A first split two-way valve; 412. a first bridge two-way valve; 42. a second three-way valve element; 421. a second split two-way valve; 422. a second bridge two-way valve; 51. a first heat exchanger outside the chamber; 52. an outdoor side second heat exchanger; 61. a second throttling element; 62. a third throttling element; 7. a four-way valve; 8. an electric heating device.
Detailed Description
With reference to fig. 1 to 5, according to an embodiment of the present invention, a heat pump system is provided, including a compressor 1, an indoor heat exchanger 2, a first throttling element 3, a first three-way valve 41, a second three-way valve 42, a first heat exchanger 51 at an outdoor side, a second heat exchanger 52 at an outdoor side, the first three-way valve 41 and the second three-way valve 42 respectively have a first port aa, a second port ab, a third port ac, a fourth port ba, a fifth port bb, and a sixth port bc that can selectively run through, the first three-way valve 41 communicates with the first heat exchanger 51 at an outdoor side through the first port aa to form a first branch refrigerant passage, the second three-way valve 42 communicates with the second heat exchanger 52 at a fourth port ba to form a second branch refrigerant passage, that is, one end of the first branch passage and one end of the second branch passage after being connected in parallel (for the heat pump system to enter in a heating mode, the first branch passage and the second branch passage are connected in parallel with the first branch passage and the second branch passage The corresponding end of the branch) is connected with an exhaust port of the compressor 1, the other end of the first branch is connected with the second branch in parallel (that is, the refrigerant in the heat pump system in the heating mode flows out of the corresponding end of the first branch and the corresponding end of the second branch) is connected with an air suction port of the compressor 1, the third port ac and the sixth port bc are connected in a penetrating manner to form a gap bridge flow path, and the exhaust port of the compressor 1 is further connected with the gap bridge flow path through an indoor side heat exchanger 2 and a first throttling element 3 in sequence. In the technical scheme, the first three-way valve 41 and the second three-way valve 42 form the first shunt branch, the second shunt branch and the gap bridge flow path which are connected in parallel, so that the heat pump system can defrost one of the outdoor first heat exchanger 51 or the outdoor second heat exchanger 52 by selectively conducting corresponding ports of the first three-way valve 41 and the second three-way valve 42 while running in a heating mode, the heat pump system is not required to be switched from the heating mode to a cooling mode, the stability of indoor temperature is further ensured, and the comfort level of a user is improved The valve block control logic is more simplified.
As a specific embodiment, the first three-way valve element 41 and the second three-way valve element 42 can be implemented by a conventional three-way valve, for example, the first three-way valve element 41 includes a first three-way valve, and/or the second three-way valve element 42 includes a second three-way valve; of course, the first three-way valve element 41 and the second three-way valve element 42 may adopt a conventional combination of two-way valves to realize the function of three-way flow path switching, for example, the first three-way valve element 41 includes a first split two-way valve 411 and a first bridging two-way valve 412, the first split two-way valve 411 and the first bridging two-way valve 412 are connected in series to form the first three-way valve element 41, and/or the second three-way valve element 42 includes a second split two-way valve 421 and a second bridging two-way valve 422, and the second split two-way valve 421 and the second bridging two-way valve 422 are connected in series to form the second three-way valve element 42. It should be noted that the first split two-way valve 411, the first bridging two-way valve 412, the second split two-way valve 421 and the second bridging two-way valve 422 are two-way valves in nature, and the above-mentioned names are only set in terms of flow paths for their applications and are adopted for convenience of distinction. Further, it is preferable to use a three-way valve, which is more simplified in terms of control logic of the valve line.
As shown in fig. 2, when the outdoor side first heat exchanger 51 is defrosted, one path of the high temperature exhaust gas of the compressor 1 at this time enters the second branch flow path through the fifth port bb and the fourth port ba of the second three-way valve 42, and the other path of the high temperature exhaust gas of the compressor 1 flows into the indoor side heat exchanger 2 for indoor heating, then flows through the outdoor side first heat exchanger 51 via the first throttling element 3, the third port ac and the first port aa, then merges with the outflow side of the outdoor side second heat exchanger 52, and is preferably guided to the suction port of the compressor 1, and in order to ensure that the refrigerant of the outdoor side first heat exchanger 51 and the outdoor side second heat exchanger 52 does not flow back to the outdoor side first heat exchanger 51 or the outdoor side second heat exchanger 52 due to an excessive pressure difference, preferably, the first branch flow path is further connected in series with a second throttling element 61, the outdoor side first heat exchanger 51 is positioned between the second throttling element 61 and the first three-way valve element 41; and/or, a third throttling element 62 is further connected in series to the second branch path, the outdoor side second heat exchanger 52 is located between the third throttling element 62 and the second three-way valve 42, and at this time, the pressures of the refrigerant flowing out of the second throttling element 61 and the refrigerant flowing out of the third throttling element 62 can be balanced by controlling the opening degrees (the number of steps) of the second throttling element and the refrigerant flowing out of the third throttling element 62, and the refrigerant is smoothly sucked into the compressor 1.
Preferably, the heat pump system further includes a four-way valve 7, the four-way valve 7 has a seventh port ca, an eighth port cb, a ninth port cc, and a tenth port cd, which are selectively communicated with each other, the seventh port ca is connected to the indoor heat exchanger 2, the eighth port cb is connected to the exhaust port of the compressor 1, the ninth port cc is connected to the other end of the first and second bypass branches after being connected in parallel, and the tenth port cd is connected to the suction port of the compressor 1, at this time, the heat pump system can switch the connection mode of each port of the four-way valve 7, and further, the heat pump system can switch between the cooling mode and the heating mode.
Further, the heat pump system further includes an electric heating device 8, the electric heating device 8 is disposed at the indoor side heat exchanger 2, the electric heating device 8 may be, for example, an electric heater, and the electric heating device 8 is disposed at the air outlet side of the indoor heat exchanger 2 so as to be closer to the user side.
The indoor side heat exchanger 2 is a tube-fin heat exchanger or a micro-channel heat exchanger; and/or, the outdoor side first heat exchanger 51 is a tube fin heat exchanger or a micro-channel heat exchanger; and/or, the outdoor side second heat exchanger 52 is a tube fin heat exchanger or a microchannel heat exchanger.
According to the embodiment of the present invention, there is provided a defrosting control method for controlling the heat pump system to defrost the outdoor side first heat exchanger 51 or the outdoor side second heat exchanger 52, including:
when the defrosting device is used for defrosting the outdoor side first heat exchanger 51 (as shown in fig. 2), the first port aa and the second port ab of the first three-way valve 41 are controlled to be conducted, and the third port bc and the fourth port ba of the second three-way valve 42 are controlled to be conducted; or, when the defrosting device is used for defrosting the outdoor side second heat exchanger 52 (as shown in fig. 3), the first port aa and the third port ac of the first three-way valve 41 are controlled to be conducted, and the second port bb and the fourth port ba of the second three-way valve 42 are controlled to be conducted. It will be appreciated that the foregoing defrost control is premised on the heat pump system having been selected to operate in a defrost mode. Further, as shown in fig. 4 and 5, at this time, the heat pump system is selected to operate in the heating mode, at this time, the high-temperature exhaust gas of the compressor 1 enters the indoor side heat exchanger 2 and then is divided into two paths to enter the outdoor side first heat exchanger 51 and the outdoor side second heat exchanger 52 which are connected in parallel, at this time, the first port aa and the second port ab of the first three-way valve 41 are correspondingly controlled to be conducted, the fourth port ba and the fifth port bb of the second three-way valve 42 are controlled to be conducted, and the bridging flow path is cut off.
Further, when a second throttling element 61 is connected in series to the first branch path, and a third throttling element 62 is connected in series to the second branch path, the method further includes:
when the outdoor side first heat exchanger 51 is to be defrosted, the first port aa and the second port ab of the first three-way valve 41 are controlled to be communicated, the third port bc and the fourth port ba of the second three-way valve 42 are controlled to be communicated, the throttle opening of the third throttle element 62 is controlled to be a first throttle opening, the throttle opening of the second throttle element 61 is controlled to be a second throttle opening, and the second throttle opening is lower than the first throttle opening, so that the pressures of the refrigerant flowing out of the second throttle element 61 and the refrigerant flowing out of the third throttle element 62 are equal; alternatively, the first and second electrodes may be,
when the outdoor side second heat exchanger 52 is to be defrosted, the first port aa and the third port ac of the first three-way valve 41 are controlled to be communicated, the second port bb and the fourth port ba of the second three-way valve 42 are controlled to be communicated, the throttle opening of the second throttle element 61 is controlled to be a first throttle opening, and the throttle opening of the third throttle element 62 is controlled to be a second throttle opening, where the first throttle opening is lower than the second throttle opening, so that the pressures of the refrigerant flowing out of the second throttle element 61 and the third throttle element 62 are equal to each other.
In order to further simplify the control logic of the throttle opening, when the control logic is used for defrosting the outdoor side first heat exchanger 51, the first port aa and the second port ab of the first three-way valve 41 are controlled to be communicated, the third port bc and the fourth port ba of the second three-way valve 42 are controlled to be communicated, the throttle opening of the third throttle element 62 is controlled to be the maximum opening (i.e. no throttle action is performed at this time), and the throttle opening of the second throttle element 61 is controlled to be smaller than the maximum opening; alternatively, the first and second electrodes may be,
when the outdoor side second heat exchanger 52 is to be defrosted, the first port aa and the third port ac of the first three-way valve 41 are controlled to be communicated, the second port bb and the fourth port ba of the second three-way valve 42 are controlled to be communicated, the throttle opening of the third throttle element 62 is controlled to be the maximum opening (i.e., no throttle action is performed at this time), and the throttle opening of the second throttle element 61 is controlled to be lower than the maximum opening.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A heat pump system is characterized by comprising a first three-way valve element (41) and a second three-way valve element (42), wherein the first three-way valve element (41) and the second three-way valve element (42) are respectively provided with a first port, a second port, a third port, a fourth port, a fifth port and a sixth port which can be selectively communicated, the first three-way valve element (41) is communicated with an outdoor side first heat exchanger (51) through the first port to form a first shunting branch, the second three-way valve element (42) is communicated with an outdoor side second heat exchanger (52) through the fourth port to form a second shunting branch, one end of the first shunting branch is connected with the second shunting branch in parallel and then is connected with an exhaust port of a compressor (1), the other end of the first shunting branch is connected with the second shunting branch in parallel and then is connected with an air suction port of the compressor (1), and the third port is communicated with the sixth port to form a bridging flow path, and the exhaust port of the compressor (1) is also connected with the gap bridge flow path sequentially through the indoor side heat exchanger (2) and the first throttling element (3).
2. A heat pump system according to claim 1, characterized in that said first three-way valve member (41) comprises a first three-way valve and/or said second three-way valve member (42) comprises a second three-way valve.
3. The heat pump system according to claim 1, wherein the first three-way valve element (41) comprises a first split two-way valve (411) and a first bridge two-way valve (412), the first split two-way valve (411) being connected in series with the first bridge two-way valve (412) to form the first three-way valve element (41), and/or the second three-way valve element (42) comprises a second split two-way valve (421) and a second bridge two-way valve (422), the second split two-way valve (421) and the second bridge two-way valve (422) being connected in series to form the second three-way valve element (42).
4. A heat pump system according to any one of claims 1 to 3, wherein a second throttling element (61) is further connected in series to said first branch path, and said outdoor side first heat exchanger (51) is located between said second throttling element (61) and said first three-way valve element (41); and/or a third throttling element (62) is further connected in series to the second branch path, and the outdoor side second heat exchanger (52) is located between the third throttling element (62) and the second three-way valve element (42).
5. The heat pump system according to any one of claims 1 to 3, further comprising a four-way valve (7), wherein the four-way valve (7) has a seventh port, an eighth port, a ninth port and a tenth port which are selectively communicated, the seventh port is connected to the indoor-side heat exchanger (2), the eighth port is connected to the exhaust port of the compressor (1), the ninth port is connected to the other end of the first and second flow-dividing branches after being connected in parallel, and the tenth port is connected to the suction port of the compressor (1).
6. A heat pump system according to any one of claims 1 to 3, further comprising an electric heating device (8), said electric heating device (8) being provided at said indoor side heat exchanger (2).
7. A heat pump system according to any one of claims 1 to 3, wherein the indoor side heat exchanger (2) is a tube and fin heat exchanger or a microchannel heat exchanger; and/or the first heat exchanger (51) on the outdoor side is a tube-fin heat exchanger or a micro-channel heat exchanger; and/or the second heat exchanger (52) on the outdoor side is a tube-fin heat exchanger or a micro-channel heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020279785.1U CN212057819U (en) | 2020-03-09 | 2020-03-09 | Heat pump system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020279785.1U CN212057819U (en) | 2020-03-09 | 2020-03-09 | Heat pump system |
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| CN212057819U true CN212057819U (en) | 2020-12-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336712A (en) * | 2020-03-09 | 2020-06-26 | 珠海格力电器股份有限公司 | Heat pump system and corresponding defrosting control method thereof |
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2020
- 2020-03-09 CN CN202020279785.1U patent/CN212057819U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336712A (en) * | 2020-03-09 | 2020-06-26 | 珠海格力电器股份有限公司 | Heat pump system and corresponding defrosting control method thereof |
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