Air supplementing and enthalpy increasing system

Abstract

The invention belongs to the technical field of air conditioning systems, and discloses an air supply enthalpy increasing system which comprises an air supply compressor, a heat exchanger, a first four-way valve, a second four-way valve and a three-way valve, the air supply compressor is provided with an air suction port, an air outlet and an air supply port, and the heat exchanger is provided with a first heat exchange port, a second heat exchange port, a third heat exchange port and a fourth heat exchange port. The indoor unit is provided with a first overflowing opening and a second overflowing opening, the outdoor unit is provided with a third overflowing opening and a fourth overflowing opening, the first four-way valve communicates with the air suction opening, the air outlet, the first overflowing opening and the third overflowing opening, and the three-way valve communicates with the second overflowing opening, the first heat exchange opening and one valve opening of the second four-way valve. The other three valve ports of the second four-way valve communicate with the third heat exchange port, the air supply port and a connecting pipeline between the second heat exchange port and the fourth overflowing port correspondingly, the second heat exchange port communicates with the fourth overflowing port, and the fourth heat exchange port communicates with a connecting pipeline between the second overflowing port and the three-way valve. The system may be adapted for cooling and heating modes, respectively.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning systems, and in particular to an air-increasing and enthalpy-increasing system. Background Art

[0002] In the field of air conditioners, the application of the air-increasing and enthalpy-increasing system has achieved the improvement of the heating capacity and the coefficient of performance (COP) under low-temperature conditions. At the same time, it can reduce the exhaust temperature of the compressor, enabling the compressor to operate under more extreme conditions.

[0003] The traditional air-increasing and enthalpy-increasing system is referred to Figure 1 As shown, the heat exchange medium discharged from the outlet 12' of the air-increasing compressor 1' is divided into two paths after heat exchange in the indoor unit 3'. The heat exchange medium in the first path sequentially passes through the first heat exchange port 21' and the second heat exchange port 22' of the heat exchanger 2', and then enters the second throttling device 7' for throttling. After that, it enters the outdoor unit 4', is heat-exchanged again, and is discharged from the outdoor unit 4' and returns to the suction port 11' of the air-increasing compressor 1'. The heat exchange medium in the second path passes through the first throttling device 6' and then sequentially passes through the fourth heat exchange port 24' and the third heat exchange port 23' of the heat exchanger 2', exchanges heat with the heat exchange medium in the first path in the heat exchanger 2', and then returns to the air-increasing port 13' of the air-increasing compressor 1' after passing through the air-increasing valve 5', completing the cycle. The above-mentioned air-increasing and enthalpy-increasing system is only applicable to the heating condition of the air conditioning system, and cannot realize the switching between the cooling mode and the heating mode like a conventional heat pump air conditioner, which brings limitations to the use of the air conditioning system. Summary of the Invention

[0004] The purpose of the present invention is to provide an air-increasing and enthalpy-increasing system. By setting a four-way valve and a three-way valve, the automatic switching between the cooling mode and the heating mode of the air-increasing and enthalpy-increasing system can be realized under the coordinated control of the four-way valve and the three-way valve. The structure is simple, the applicability is strong, and the pressure drops of the four-way valve and the three-way valve are extremely small, with less resistance loss, and will not have a great impact on the performance of the entire system.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] An air-increasing and enthalpy-increasing system is applied to an air conditioning system. The air conditioning system includes an indoor unit and an outdoor unit. The air-increasing and enthalpy-increasing system includes an air-increasing compressor, a heat exchanger, a first four-way valve, a second four-way valve, and a three-way valve. Among them,

[0007] The air-increasing compressor has a suction port, an outlet port, and an air-increasing port; the heat exchanger has a first heat exchange port, a second heat exchange port, a third heat exchange port, and a fourth heat exchange port. The first heat exchange port is communicated with the second heat exchange port, and the third heat exchange port is communicated with the fourth heat exchange port; the indoor unit has a first flow-through port and a second flow-through port, and the outdoor unit has a third flow-through port and a fourth flow-through port;

[0008] The four valve ports of the first four-way valve are respectively connected to the suction port, the discharge port, the first flow-through port, and the third flow-through port; the three valve ports of the three-way valve are respectively connected to the first heat exchange port, the second flow-through port, and one of the valve ports of the second four-way valve; the second heat exchange port is connected to the fourth flow-through port, the fourth heat exchange port is connected to the connecting pipeline between the second flow-through port and the three-way valve, and the remaining three valve ports of the second four-way valve are respectively connected to the third heat exchange port, the gas supply port, and the connecting pipeline between the second heat exchange port and the fourth flow-through port.

[0009] Preferably, the first four-way valve has a first valve port, a second valve port, a third valve port, and a fourth valve port; the discharge port is connected to the first valve port through a first pipe, the first flow-through port is connected to the second valve port through a second pipe, the suction port is connected to the third valve port through a third pipe, and the third flow-through port is connected to the fourth valve port through a fourth pipe;

[0010] The first four-way valve has a first control state and a second control state;

[0011] When in the first control state, the first valve port is connected to the second valve port, and the third valve port is connected to the fourth valve port; when in the second control state, the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port.

[0012] Preferably, the second four-way valve has a fifth valve port, a sixth valve port, a seventh valve port, and an eighth valve port; the third heat exchange port is connected to the fifth valve port through a fifth pipe, the gas supply port is connected to the sixth valve port through a sixth pipe, one of the valve ports of the three-way valve is connected to the seventh valve port through a seventh pipe, the second heat exchange port and the fourth flow-through port are connected through an eleventh pipe, and the eleventh pipe is connected to the eighth valve port through an eighth pipe;

[0013] The second four-way valve has a third control state and a fourth control state;

[0014] When in the third control state, the fifth valve port is connected to the sixth valve port, and the seventh valve port is connected to the eighth valve port; when in the fourth control state, the fifth valve port is connected to the eighth valve port, and the sixth valve port is connected to the seventh valve port.

[0015] Preferably, a gas supply valve is further included, and the gas supply valve is arranged on the sixth pipe.

[0016] Preferably, the gas supply valve is set as a on-off valve or a regulating valve.

[0017] Preferably, the three-way valve has a ninth valve port, a tenth valve port, and an eleventh valve port; the first heat exchange port is communicated with the ninth valve port through a ninth pipe, the second flow-through port is communicated with the tenth valve port through a tenth pipe, and the seventh valve port is communicated with the eleventh valve port through the seventh pipe;

[0018] The three-way valve has a fifth control state and a sixth control state;

[0019] When in the fifth control state, the ninth valve port is communicated with the tenth valve port; when in the sixth control state, the ninth valve port is communicated with the eleventh valve port.

[0020] Preferably, it further includes a first throttling device. The fourth heat exchange port is communicated with the tenth pipe through a twelfth pipe, and the first throttling device is used to adjust the flow rate of the twelfth pipe.

[0021] Preferably, the first throttling device is arranged on the twelfth pipe, and the first throttling device is set as an expansion valve, a capillary tube, or an orifice plate.

[0022] Preferably, it further includes a second throttling device, and the second throttling device is used to adjust the flow rate of the eleventh pipe.

[0023] Preferably, the second throttling device is arranged on the eleventh pipe between the second heat exchange port and the eighth pipe, and the second throttling device is set as an expansion valve, a capillary tube, or an orifice plate.

[0024] Beneficial effects:

[0025] The gas-injected enthalpy-increasing system provided by the present invention can be applied to both heating and cooling conditions of an air-conditioning system. When the air-conditioning system is heating, control the first four-way valve to conduct the valve port connecting the air outlet and the first flow-through port, and conduct the valve port connecting the suction port and the third flow-through port; control the three-way valve to conduct the valve port connecting the first heat exchange port and the second flow-through port; control the second four-way valve to conduct the valve port connecting the gas injection port and the third heat exchange port. The heat exchange medium discharged from the air outlet of the gas injection compressor flows through the first four-way valve and then successively through the first flow-through port and the second flow-through port of the indoor unit, and exchanges heat in the indoor unit. Subsequently, the heat exchange medium is divided into two paths. The heat exchange medium in the first path passes through the three-way valve, the first heat exchange port and the second heat exchange port of the heat exchanger, and exchanges heat in the heat exchanger. Then it successively flows through the fourth flow-through port and the third flow-through port of the outdoor unit, and then returns to the suction port of the gas injection compressor through the first four-way valve; the heat exchange medium in the second path successively flows through the fourth heat exchange port and the third heat exchange port of the heat exchanger, exchanges heat with the heat exchange medium in the first path in the heat exchanger, and then returns to the gas injection port of the gas injection compressor through the second four-way valve to complete the cycle.

[0026] When the air - conditioning system is in the refrigeration mode, control the first four - way valve to open the valve port connecting the air outlet and the third flow - through port, and open the valve port connecting the suction port and the first flow - through port; control the three - way valve to open the valve port connecting the first heat - exchange port and the second four - way valve; control the second four - way valve to open the fourth flow - through port and the third heat - exchange port, and open the valve port connecting the gas - supplement port and the three - way valve so that the first heat - exchange port is sequentially connected to the gas - supplement port through the three - way valve and the second four - way valve. The heat - exchange medium discharged from the air outlet of the gas - supplement compressor passes through the first four - way valve and then flows through the third flow - through port and the fourth flow - through port of the outdoor unit in sequence, and exchanges heat in the outdoor unit. Subsequently, the heat - exchange medium is divided into two paths. The heat - exchange medium of the first path passes through the second four - way valve, the third heat - exchange port and the fourth heat - exchange port of the heat exchanger, and exchanges heat in the heat exchanger. Then it passes through the second flow - through port and the first flow - through port of the indoor unit in sequence, and then returns to the suction port of the gas - supplement compressor through the first four - way valve; The heat - exchange medium of the second path flows through the second heat - exchange port and the first heat - exchange port of the heat exchanger in sequence, exchanges heat with the heat - exchange medium of the first path in the heat exchanger, and then returns to the gas - supplement port of the gas - supplement compressor through the three - way valve and the second four - way valve in sequence to complete the cycle.

[0027] For this gas - supplement and enthalpy - increase system, through the coordinated control of the first four - way valve, the second four - way valve and the three - way valve, the automatic switching between the refrigeration mode and the heating mode of the gas - supplement and enthalpy - increase system can be realized. The structure is simple and has strong applicability. Moreover, the pressure drops of the first four - way valve, the second four - way valve and the three - way valve are extremely small, and the resistance loss is small, which will not have a great impact on the performance of the whole system. Brief Description of the Drawings

[0028] Figure 1 is a schematic diagram of the gas - supplement and enthalpy - increase system in the prior art;

[0029] Figure 2 is a schematic diagram of the gas - supplement and enthalpy - increase system provided by the present invention when the air - conditioning system is in the heating mode;

[0030] Figure 3 is in the present invention Figure 2 Partial enlarged view at A1;

[0031] Figure 4 is in the present invention Figure 2 Partial enlarged view at B1;

[0032] Figure 5 is in the present invention Figure 2 Partial enlarged view at C1;

[0033] Figure 6 is a schematic diagram of the gas - supplement and enthalpy - increase system provided by the present invention when the air - conditioning system is in the refrigeration mode;

[0034] Figure 7 is in the present invention Figure 6 Partial enlarged view at A2;

[0035] Figure 8 The present invention Figure 6 A partial enlarged view of B2 in the middle;

[0036] Figure 9 The present invention Figure 6 A local enlarged view of C2 in the middle.

[0037] In the figure:

[0038] 1', air supply compressor; 11', air intake port; 12', air outlet port; 13', air supply port; 2', heat exchanger; 21', first heat exchange port; 22', second heat exchange port; 23', third heat exchange port; 24', fourth heat exchange port; 3', indoor unit; 4', outdoor unit; 5', air supply valve; 6', first throttling device; 7', second throttling device;

[0039] 1. Air supply compressor; 11. Air inlet; 12. Air outlet; 13. Air supply port;

[0040] 2. Heat exchanger; 21. First heat exchange port; 22. Second heat exchange port; 23. Third heat exchange port; 24. Fourth heat exchange port;

[0041] 3. First four-way valve; 31. First valve port; 32. Second valve port; 33. Third valve port; 34. Fourth valve port;

[0042] 4, second four-way valve; 41, fifth valve port; 42, sixth valve port; 43, seventh valve port; 44, eighth valve port;

[0043] 5, three-way valve; 51, ninth valve port; 52, tenth valve port; 53, eleventh valve port;

[0044] 6. Indoor unit; 61. First flow outlet; 62. Second flow outlet;

[0045] 7. Outdoor unit; 71. Third flow outlet; 72. Fourth flow outlet;

[0046] 81, the first tube; 82, the second tube; 83, the third tube; 84, the fourth tube; 85, the fifth tube; 86, the sixth tube; 87, the seventh tube; 88, the eighth tube; 89, the ninth tube; 810, the tenth tube; 811, the eleventh tube; 812, the twelfth tube;

[0047] 91. Air supply valve; 92. First throttling device; 93. Second throttling device. DETAILED DESCRIPTION

[0048] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0049] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0051] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0052] This embodiment provides a gas supplementation and enthalpy increase system. Figures 2 to 9 As shown, the air-injection and heat-increasing system is applied to an air-conditioning system, and the air-conditioning system includes an indoor unit 6 and an outdoor unit 7. The air-injection and heat-increasing system includes an air-injection compressor 1, a heat exchanger 2, a first four-way valve 3, a second four-way valve 4 and a three-way valve 5.

[0053] Specifically, the gas-increasing compressor 1 has a suction port 11, a discharge port 12, and a gas-increasing port 13. The heat exchanger 2 has a first heat exchange port 21, a second heat exchange port 22, a third heat exchange port 23, and a fourth heat exchange port 24. The first heat exchange port 21 communicates with the second heat exchange port 22, and the third heat exchange port 23 communicates with the fourth heat exchange port 24. The indoor unit 6 has a first flow-through port 61 and a second flow-through port 62, and the outdoor unit 7 has a third flow-through port 71 and a fourth flow-through port 72.

[0054] The first flow-through port 61 communicates with the second flow-through port 62, and the third flow-through port 71 communicates with the fourth flow-through port 72.

[0055] Specifically, the four valve ports of the first four-way valve 3 communicate with the suction port 11, the discharge port 12, the first flow-through port 61, and the third flow-through port 71 respectively.

[0056] Specifically, the three valve ports of the three-way valve 5 communicate with the first heat exchange port 21, the second flow-through port 62, and one of the valve ports of the second four-way valve 4 respectively.

[0057] Specifically, the second heat exchange port 22 communicates with the fourth flow-through port 72, the fourth heat exchange port 24 communicates with the connecting pipeline between the second flow-through port 62 and the three-way valve 5, and the remaining three valve ports of the second four-way valve 4 communicate with the third heat exchange port 23, the gas-increasing port 13, and the connecting pipeline between the second heat exchange port 22 and the fourth flow-through port 72 respectively.

[0058] The gas-increasing enthalpy system provided in this embodiment can be applied to both the heating and cooling conditions of the air-conditioning system.

[0059] When the air-conditioning system is in heating mode, control the first four-way valve 3 to conduct the valve port connecting the discharge port 12 and the first flow-through port 61, and conduct the valve port connecting the suction port 11 and the third flow-through port 71; control the three-way valve 5 to conduct the valve port connecting the first heat exchange port 21 and the second flow-through port 62; control the second four-way valve 4 to conduct the valve port connecting the gas-increasing port 13 and the third heat exchange port 23. The heat exchange medium discharged from the discharge port 12 of the gas-increasing compressor 1 passes through the first four-way valve 3 and then flows through the first flow-through port 61 and the second flow-through port 62 of the indoor unit 6 in sequence, and exchanges heat in the indoor unit 6. Subsequently, the heat exchange medium is divided into two paths. The heat exchange medium in the first path passes through the three-way valve 5, the first heat exchange port 21 and the second heat exchange port 22 of the heat exchanger 2, and exchanges heat in the heat exchanger 2. Subsequently, it passes through the fourth flow-through port 72 and the third flow-through port 71 of the outdoor unit 7 in sequence, and then returns to the suction port 11 of the gas-increasing compressor 1 through the first four-way valve 3; the heat exchange medium in the second path passes through the fourth heat exchange port 24 and the third heat exchange port 23 of the heat exchanger 2 in sequence, and exchanges heat with the heat exchange medium in the first path in the heat exchanger 2, and then returns to the gas-increasing port 13 of the gas-increasing compressor 1 through the second four-way valve 4 to complete the cycle.

[0060] When the air-conditioning system is in the refrigeration mode, control the first four-way valve 3 to open the valve port connecting the air outlet 12 and the third overcurrent port 71, and open the valve port connecting the suction port 11 and the first overcurrent port 61; control the three-way valve 5 to open the valve port connecting the first heat exchange port 21 and the second four-way valve 4; control the second four-way valve 4 to open the fourth overcurrent port 72 and the third heat exchange port 23, and open the valve port connecting the gas supplement port 13 and the three-way valve 5 so that the first heat exchange port 21 is sequentially connected to the gas supplement port 13 through the three-way valve 5 and the second four-way valve 4. The heat exchange medium discharged from the air outlet 12 of the gas supplement compressor 1 passes through the first four-way valve 3 and then flows through the third overcurrent port 71 and the fourth overcurrent port 72 of the outdoor unit 7 in sequence, and exchanges heat in the outdoor unit 7. Subsequently, the heat exchange medium is divided into two paths. The heat exchange medium of the first path passes through the third heat exchange port 23 and the fourth heat exchange port 24 of the heat exchanger 2, and exchanges heat in the heat exchanger 2. Subsequently, it sequentially passes through the second overcurrent port 62 and the first overcurrent port 61 of the indoor unit, and then returns to the suction port 11 of the gas supplement compressor 1 through the first four-way valve 3; the heat exchange medium of the second path sequentially passes through the second heat exchange port 22 and the first heat exchange port 21 of the heat exchanger 2, exchanges heat with the heat exchange medium of the first path in the heat exchanger 2, and then sequentially passes through the three-way valve 5 and the second four-way valve 4 to return to the gas supplement port 13 of the gas supplement compressor 1 to complete the cycle.

[0061] For this gas supplement and enthalpy increase system, through the coordinated control of the first four-way valve 3, the second four-way valve 4 and the three-way valve 5, gas supplement and enthalpy increase can be achieved in both the refrigeration and heating modes. The structure is simple and the applicability is strong.

[0062] Specifically, the first four-way valve 3 has a first valve port 31, a second valve port 32, a third valve port 33 and a fourth valve port 34; the air outlet 12 is connected to the first valve port 31 through a first pipe 81, the first overcurrent port 61 is connected to the second valve port 32 through a second pipe 82, the suction port 11 is connected to the third valve port 33 through a third pipe 83, and the third overcurrent port 71 is connected to the fourth valve port 34 through a fourth pipe 84. The first four-way valve 3 has a first control state and a second control state. When in the first control state, the first valve port 31 is connected to the second valve port 32, and the third valve port 33 is connected to the fourth valve port 34; when in the second control state, the first valve port 31 is connected to the fourth valve port 34, and the second valve port 32 is connected to the third valve port 33.

[0063] Specifically, the second four-way valve 4 has a fifth valve port 41, a sixth valve port 42, a seventh valve port 43, and an eighth valve port 44; the third heat exchange port 23 is communicated with the fifth valve port 41 through a fifth pipe 85, the air supplement port 13 is communicated with the sixth valve port 42 through a sixth pipe 86, one valve port of the three-way valve 5 is communicated with the seventh valve port 43 through a seventh pipe 87, and the second heat exchange port 22 and the fourth flow-through port 72 are communicated with each other through an eleventh pipe 811, and the eleventh pipe 811 is communicated with the eighth valve port 44 through an eighth pipe 88. The second four-way valve 4 has a third control state and a fourth control state. When in the third control state, the fifth valve port 41 is communicated with the sixth valve port 42, and the seventh valve port 43 is communicated with the eighth valve port 44; when in the fourth control state, the fifth valve port 41 is communicated with the eighth valve port 44, and the sixth valve port 42 is communicated with the seventh valve port 43.

[0064] Specifically, the three-way valve 5 has a ninth valve port 51, a tenth valve port 52, and an eleventh valve port 53; the first heat exchange port 21 is communicated with the ninth valve port 51 through a ninth pipe 89, the second flow-through port 62 is communicated with the tenth valve port 52 through a tenth pipe 810, and the seventh valve port 43 is communicated with the eleventh valve port 53 through a seventh pipe 87. The three-way valve 5 has a fifth control state and a sixth control state. When in the fifth control state, the ninth valve port 51 is communicated with the tenth valve port 52; when in the sixth control state, the ninth valve port 51 is communicated with the eleventh valve port 53.

[0065] Specifically, the fourth heat exchange port 24 is communicated with the tenth pipe 810 through a twelfth pipe 812.

[0066] Specifically, when the air-conditioning system is in heating mode, the first four-way valve 3 is adjusted to the first control state, the first valve port 31 is communicated with the second valve port 32, so that the air outlet 12 is communicated with the first flow-through port 61, and the third valve port 33 is communicated with the fourth valve port 34, so that the suction port 11 is communicated with the third flow-through port 71. The second four-way valve 4 is adjusted to the third control state, the fifth valve port 41 is communicated with the sixth valve port 42, so that the third heat exchange port 23 is communicated with the air supplement port 13, and the seventh valve port 43 is communicated with the eighth valve port 44. The three-way valve 5 is adjusted to the fifth control state, the ninth valve port 51 is communicated with the tenth valve port 52, so that the second flow-through port 62 is communicated with the first heat exchange port 21.

[0067] Specifically, the heat exchange medium discharged from the air outlet 12 of the air supplement compressor 1 flows through the first pipe 81, the first valve port 31, and the second valve port 32 in sequence, passes through the first four-way valve 3, then flows through the second pipe 82 and the first flow port 61 in sequence, enters the indoor unit 6 for heat exchange, and then flows out through the second flow port 62. Subsequently, the heat exchange medium flows into the tenth pipe 810 and is divided into two paths. The heat exchange medium in the first path passes through the tenth pipe 810, the tenth valve port 52 and the ninth valve port 51 of the three-way valve 5, then flows through the ninth pipe 89 and the first heat exchange port 21 in sequence, enters the heat exchanger 2 for heat exchange, and then flows out through the second heat exchange port 22. Then it flows through the eleventh pipe 811 and the fourth flow port 72 in sequence, enters the outdoor unit 7 for heat exchange, and then flows out through the third flow port 71. Subsequently, it passes through the fourth pipe 84, the fourth valve port 34 and the third valve port 33 of the first four-way valve 3 and the third pipe 83 in sequence, and returns to the suction port 11 of the air supplement compressor 1. The heat exchange medium in the second path passes through the twelfth pipe 812 and the fourth heat exchange port 24 in sequence, flows through the heat exchanger 2 to exchange heat with the heat exchange medium in the first path, and then flows out through the third heat exchange port 23. Then it passes through the fifth pipe 85, the fifth valve port 41 and the sixth valve port 42 of the second four-way valve 4 in sequence, and returns to the air supplement port 13 of the air supplement compressor 1 through the sixth pipe 86 to complete the cycle.

[0068] Specifically, when the air conditioning system is in the refrigeration mode, the first four-way valve 3 is adjusted to the second control state, the first valve port 31 is communicated with the fourth valve port 34, so that the air outlet 12 is communicated with the third flow port 71, and the second valve port 32 is communicated with the third valve port 33, so that the suction port 11 is communicated with the first flow port 61. The second four-way valve 4 is adjusted to the fourth control state, the fifth valve port 41 is communicated with the eighth valve port 44, so that the third heat exchange port 23 is communicated with the eleventh pipe 811, and the sixth valve port 42 is communicated with the seventh valve port 43, so that the eleventh valve port 53 of the three-way valve 5 is communicated with the air supplement port 13. The three-way valve 5 is adjusted to the sixth control state, the ninth valve port 51 is communicated with the eleventh valve port 53, so that the first heat exchange port 21 is communicated with the seventh valve port 43 of the second four-way valve 4, thus enabling the first heat exchange port 21 to be communicated with the air supplement port 13 through the three-way valve 5 and the second four-way valve 4 in sequence.

[0069] The heat exchange medium discharged from the air outlet 12 of the air supplement compressor 1 flows through the first pipe 81, the first valve port 31 and the fourth valve port 34 of the first four-way valve 3 in sequence, and then flows into the outdoor unit 7 through the fourth pipe 84 and the third flow port 71 in sequence, and after heat exchange, it flows out through the fourth flow port 72. Subsequently, the heat exchange medium flows into the eleventh pipe 811 and is divided into two paths. The heat exchange medium in the first path flows through the eighth pipe 88, the eighth valve port 44 and the fifth valve port 41 of the second four-way valve 4, and then flows into the heat exchanger 2 through the fifth pipe 85 and the third heat exchange port 23 in sequence, and after heat exchange, it flows out through the fourth heat exchange port 24. Then, it flows into the indoor unit 6 through the twelfth pipe 812, the tenth pipe 810 and the second flow port 62 in sequence, and after heat exchange, it flows out through the first flow port 61. Subsequently, it returns to the suction port 11 of the air supplement compressor 1 through the second pipe 82, the second valve port 32 and the third valve port 33 of the first four-way valve 3, and the third pipe 83 in sequence. The heat exchange medium in the second path flows through the eleventh pipe 811 and the second heat exchange port 22 in sequence, flows into the heat exchanger 2, exchanges heat with the heat exchange medium in the first path, and then flows out through the first heat exchange port 21. Then, it flows through the ninth pipe 89, the ninth valve port 51 and the eleventh valve port 53 of the three-way valve 5 in sequence, and then flows through the seventh pipe 87, the seventh valve port 43 and the sixth valve port 42 of the second four-way valve 4 in sequence, and returns to the air supplement port 13 of the air supplement compressor 1 through the sixth pipe 86 to complete the cycle.

[0070] It is worth mentioning that the specific structures and the control state switching processes of the first four-way valve 3, the second four-way valve 4 and the three-way valve 5 are all prior arts and will not be elaborated here.

[0071] In this embodiment, the air supplement and enthalpy increase system further includes an air supplement valve 91, and the air supplement valve 91 is arranged on the sixth pipe 86. The setting of the air supplement valve 91 is used to open and close the sixth pipe 86 or adjust the opening degree of the sixth pipe 86, so as to realize the on-off control of the sixth pipe 86 or adjust the flow rate of the sixth pipe 86.

[0072] Exemplarily, the air supplement valve 91 is set as a switch valve or a regulating valve.

[0073] In this embodiment, the air supplement and enthalpy increase system further includes a first throttling device 92, and the first throttling device 92 is used to adjust the flow rate of the twelfth pipe 812. While adjusting the flow rate of the twelfth pipe 812, the first throttling device 92 also adjusts the air supplement pressure of the whole system. Specifically, the first throttling device 92 is arranged on the twelfth pipe 812, and the first throttling device 92 is set as an expansion valve, a capillary tube or an orifice plate.

[0074] In this embodiment, the gas-increasing and enthalpy-increasing system further includes a second throttling device 93. The second throttling device 93 is used to adjust the flow rate of the eleventh pipe 811 between the second heat exchange port 22 and the eighth pipe 88. While adjusting the flow rate of the eleventh pipe 811, the second throttling device 93 also adjusts the evaporation pressure of the entire system. Specifically, the second throttling device 93 is disposed on the eleventh pipe 811 between the second heat exchange port 22 and the eighth pipe 88, and the second throttling device 93 is set as an expansion valve or a capillary tube or an orifice plate.

[0075] In summary, for the gas-increasing and enthalpy-increasing system provided in this embodiment, the automatic switching between the refrigeration mode and the heating mode of the gas-increasing and enthalpy-increasing system can be realized through the cooperative control of the first four-way valve 3, the second four-way valve 4, and the three-way valve 5. The structure is simple and the applicability is strong. The specific structures of the first four-way valve 3, the second four-way valve 4, and the three-way valve 5 are all prior arts, that is, existing components, and there is no need to develop corresponding equipment and products separately, which has a cost advantage. Different from the design of the stop valve and the bypass pipe, the first four-way valve 3, the second four-way valve 4, and the three-way valve 5 can all be driven by a motor to change the control state, and the switching process does not require manual participation, which is convenient and efficient. In addition, the pressure drops of the first four-way valve 3, the second four-way valve 4, and the three-way valve 5 are extremely small and will not cause excessive resistance loss, so they will not have a great impact on the system performance.

[0076] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An air supplement and enthalpy increase system, applied to an air conditioning system, the air conditioning system comprising an indoor unit (6) and an outdoor unit (7), characterized in that: The air supply and enthalpy increase system comprises an air supply compressor (1), a heat exchanger (2), a first four-way valve (3), a second four-way valve (4) and a three-way valve (5); wherein: The air supply compressor (1) has an air intake port (11), an air outlet port (12) and an air supply port (13); the heat exchanger (2) has a first heat exchange port (21), a second heat exchange port (22), a third heat exchange port (23) and a fourth heat exchange port (24); the first heat exchange port (21) is connected to the second heat exchange port (22), and the third heat exchange port (23) is connected to the fourth heat exchange port (24); the indoor unit (6) has a first flow port (61) and a second flow port (62), and the outdoor unit (7) has a third flow port (71) and a fourth flow port (72); The four valve ports of the first four-way valve (3) are respectively connected to the air intake port (11), the air outlet port (12), the first flow port (61), and the third flow port (71); the three valve ports of the three-way valve (5) are respectively connected to the first heat exchange port (21), the second flow port (62), and one of the valve ports of the second four-way valve (4); the second heat exchange port (22) is connected to the fourth flow port (72), the fourth heat exchange port (24) is connected to the connecting pipeline between the second flow port (62) and the three-way valve (5), and the remaining three valve ports of the second four-way valve (4) are respectively connected to the connecting pipelines between the third heat exchange port (23), the air supply port (13), the second heat exchange port (22), and the fourth flow port (72).

2. The gas supplementing and enthalpy increasing system according to claim 1, wherein The first four-way valve (3) has a first valve port (31), a second valve port (32), a third valve port (33) and a fourth valve port (34); the air outlet (12) is connected to the first valve port (31) through a first pipe (81), the first flow port (61) is connected to the second valve port (32) through a second pipe (82), the air intake port (11) is connected to the third valve port (33) through a third pipe (83), and the third flow port (71) is connected to the fourth valve port (34) through a fourth pipe (84); The first four-way valve (3) has a first control state and a second control state; When in the first control state, the first valve port (31) is connected to the second valve port (32), and the third valve port (33) is connected to the fourth valve port (34); when in the second control state, the first valve port (31) is connected to the fourth valve port (34), and the second valve port (32) is connected to the third valve port (33).

3. The gas-supplementing and enthalpy-increasing system according to claim 1, wherein The second four-way valve (4) has a fifth valve port (41), a sixth valve port (42), a seventh valve port (43) and an eighth valve port (44); the third heat exchange port (23) is communicated with the fifth valve port (41) through a fifth pipe (85), the gas supplement port (13) is communicated with the sixth valve port (42) through a sixth pipe (86), one valve port of the three-way valve (5) is communicated with the seventh valve port (43) through a seventh pipe (87), and the second heat exchange port (22) and the fourth flow-through port (72) are communicated with each other through an eleventh pipe (811), and the eleventh pipe (811) is communicated with the eighth valve port (44) through an eighth pipe (88); The second four-way valve (4) has a third control state and a fourth control state; When in the third control state, the fifth valve port (41) is communicated with the sixth valve port (42), and the seventh valve port (43) is communicated with the eighth valve port (44); when in the fourth control state, the fifth valve port (41) is communicated with the eighth valve port (44), and the sixth valve port (42) is communicated with the seventh valve port (43).

4. The gas-supplementing and enthalpy-increasing system according to claim 3, wherein It further includes a gas supplement valve (91), and the gas supplement valve (91) is arranged on the sixth pipe (86).

5. The air supplement and enthalpy increase system according to claim 4, wherein The gas supplement valve (91) is set as a on-off valve or a regulating valve.

6. The air supplement and enthalpy increase system according to claim 3, characterized in that: The three-way valve (5) has a ninth valve port (51), a tenth valve port (52) and an eleventh valve port (53); the first heat exchange port (21) is communicated with the ninth valve port (51) through a ninth pipe (89), the second flow-through port (62) is communicated with the tenth valve port (52) through a tenth pipe (810), and the seventh valve port (43) is communicated with the eleventh valve port (53) through the seventh pipe (87); The three-way valve (5) has a fifth control state and a sixth control state; When in the fifth control state, the ninth valve port (51) is communicated with the tenth valve port (52); when in the sixth control state, the ninth valve port (51) is communicated with the eleventh valve port (53).

7. The air supplement and enthalpy increase system according to claim 6, characterized in that: It further includes a first throttling device (92), the fourth heat exchange port (24) is communicated with the tenth pipe (810) through a twelfth pipe (812), and the first throttling device (92) is used for regulating the flow rate of the twelfth pipe (812).

8. The air supplement and enthalpy increase system according to claim 7, wherein The first throttling device (92) is arranged on the twelfth pipe (812), and the first throttling device (92) is set as an expansion valve or a capillary tube or a throttling orifice plate.

9. The air supplement and enthalpy increase system according to claim 3, wherein It further includes a second throttling device (93), and the second throttling device (93) is used for regulating the flow rate of the eleventh pipe (811).

10. The gas supplement and enthalpy increase system according to claim 9, wherein, The second throttling device (93) is arranged on the eleventh pipe (811) between the second heat exchange port (22) and the eighth pipe (88), and the second throttling device is set as an expansion valve or a capillary tube or a throttling orifice plate.

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