Air Conditioner

Abstract

The present invention provides an air conditioner. The air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, a first reversing component, and a second reversing component. The outdoor heat exchanger includes a first heat exchange unit and a second heat exchange unit. When the air conditioner is in a defrosting mode, the exhaust end of the compressor is connected to the second heat exchange connection end of the indoor heat exchanger through the first reversing component, and the first heat exchange connection end of the indoor heat exchanger is connected to the second end of the first heat exchange unit and the second connection end of the second heat exchange unit; the first connection end of the second heat exchange unit is connected to the second end of the first heat exchange unit through the second reversing component, and the first end of the first heat exchange unit is connected to the suction end of the compressor through the second reversing component and the first reversing component, so that heat is exchanged between the second heat exchange unit and the first heat exchange unit when the refrigerant passes through the second heat exchange unit. The problem that the refrigerant flow rate of the indoor heat exchanger is reduced when the air conditioner in the prior art enters the defrosting mode is solved.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning, and in particular to an air conditioner. Background Art

[0002] When the air conditioner is in heating operation, if the outdoor environment is cold and the relative humidity is high, frost will easily form on the surface of the heat exchanger of the air conditioner outdoor unit, which will greatly reduce the heating effect of the air conditioner. Therefore, the air conditioner needs to remove the frost on the heat exchanger of the air conditioner outdoor unit through a defrost control method.

[0003] However, the existing defrosting method generally switches the air conditioner to a cooling mode, which greatly affects the heating efficiency and indoor comfort.

[0004] In addition, the prior art also provides a continuous heating and defrosting solution, but when this defrosting solution enters the defrost mode, part of the refrigerant is directly diverted from the exhaust port of the compressor to the corresponding unit of the outdoor heat exchanger to defrost the corresponding unit of the outdoor heat exchanger, resulting in a reduction in the refrigerant flow of the indoor heat exchanger and an excessively high inlet temperature of the outdoor heat exchanger, which ultimately greatly reduces the heating efficiency of the air conditioner; and, this defrosting solution relies on multiple pipes, multiple valves, and multiple throttling devices for defrosting, resulting in complex processes and controls and high costs. Summary of the invention

[0005] The main purpose of the present invention is to provide an air conditioner to solve the problem in the prior art that when the air conditioner enters the defrost mode, the refrigerant flow rate of the indoor heat exchanger is reduced.

[0006] In order to achieve the above-mentioned object, the present invention provides an air conditioner, comprising an indoor heat exchanger, an outdoor heat exchanger and a compressor, wherein the outdoor heat exchanger comprises a first heat exchange unit and a second heat exchange unit; the air conditioner further comprises a first reversing component and a second reversing component, wherein the first reversing component is connected to the second reversing component; the first reversing component has a first working state, and when the first reversing component is in the first working state, the exhaust end of the compressor is connected to the second heat exchange connection end of the indoor heat exchanger through the first reversing component; the second reversing component has a third working state, and when the second reversing component is in the third working state, the first connection end of the second heat exchange unit is connected to the second end of the first heat exchange unit through the second reversing component; in the first When the reversing component is in the first working state and the second reversing component is in the third working state, the first end of the first heat exchange unit is connected to the suction end of the compressor through the second reversing component and the first reversing component; the first heat exchange connection end of the indoor heat exchanger is connected to the second end of the first heat exchange unit; the first heat exchange connection end of the indoor heat exchanger and the second connection end of the second heat exchange unit can be connected on and off; when the air conditioner is in the defrost mode, the first reversing component is in the first working state, the second reversing component is in the third working state, the first heat exchange connection end of the indoor heat exchanger is connected to the second connection end of the second heat exchange unit, and heat is exchanged between the second heat exchange unit and the first heat exchange unit when the refrigerant passes through the second heat exchange unit.

[0007] Further, the first reversing component has an eighth valve port, a ninth valve port, a tenth valve port and an eleventh valve port, the eighth valve port is connected to the second heat exchange connection end of the indoor heat exchanger; the ninth valve port is connected to the suction end; the tenth valve port is connected to the second reversing component; the eleventh valve port is connected to the exhaust end; wherein, when the first reversing component is in the first working state, the eighth valve port is connected to the eleventh valve port, and the ninth valve port is connected to the tenth valve port; the first reversing component also has a second working state, when the first reversing component is in the second working state, the eighth valve port is connected to the ninth valve port, and the tenth valve port is connected to the eleventh valve port.

[0008] Further, the second reversing component has a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is connected to the second connecting end of the second heat exchange unit or the second end of the first heat exchange unit; the second valve port is connected to the first end of the first heat exchange unit; the third valve port is connected to the tenth valve port; the fourth valve port is connected to the first connecting end of the second heat exchange unit; wherein, when the second reversing component is in the third working state, the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port; the second reversing component also has a fourth working state, when the second reversing component is in the fourth working state, the first valve port is connected to the second valve port, and the third valve port is connected to the fourth valve port.

[0009] Furthermore, the air conditioner also includes: a third reversing component, the third reversing component has a fifth valve port, a sixth valve port and a seventh valve port, the fifth valve port is connected to the first valve port, the sixth valve port is connected to the second end of the first heat exchange unit, and the seventh valve port is connected to the second connection end of the second heat exchange unit; wherein, the third reversing component has a fifth working state and a sixth working state, when the third reversing component is in the fifth working state, the fifth valve port is connected to the sixth valve port; when the third reversing component is in the sixth working state, the fifth valve port is connected to the seventh valve port.

[0010] Furthermore, when the air conditioner is in defrost mode, the third reversing component is in the fifth working state; the air conditioner also has a cooling mode and a heating mode; when the air conditioner is in cooling mode, the first reversing component is in the second working state, the second reversing component is in the fourth working state, the third reversing component is in the sixth working state, and the first heat exchange connection end of the indoor heat exchanger is disconnected from the second connection end of the second heat exchange unit; when the air conditioner is in heating mode, the first reversing component is in the first working state, the second reversing component is in the fourth working state, the third reversing component is in the sixth working state, and the first heat exchange connection end of the indoor heat exchanger is disconnected from the second connection end of the second heat exchange unit.

[0011] Furthermore, the air conditioner also includes: a first connecting pipe, one end of the first connecting pipe is connected to the first heat exchange connecting end of the indoor heat exchanger, and the other end of the first connecting pipe is connected to the second end of the first heat exchange unit; a second connecting pipe, one end of the second connecting pipe is connected to the first connecting pipe, and the other end of the second connecting pipe is connected to the second connecting end of the second heat exchange unit; a third connecting pipe, one end of the third connecting pipe is connected to the first connecting pipe and is located between the second connecting pipe and the first heat exchange unit, and the other end of the third connecting pipe is connected to the second connecting pipe; wherein the third reversing component is arranged on the third connecting pipe, and the sixth valve port and the seventh valve port are located on the third connecting pipe.

[0012] Furthermore, the air conditioner further comprises: a control valve, which is arranged on the second connecting pipe and located on a side of the third connecting pipe away from the second heat exchange unit.

[0013] Furthermore, the air conditioner also includes: a second flow meter, which is arranged on the second connecting pipe and located on a side of the third connecting pipe close to the second heat exchange unit.

[0014] Furthermore, the air conditioner further comprises: a first flow meter, which is arranged on the first connecting pipe and located between the second connecting pipe and the indoor heat exchanger.

[0015] Furthermore, the air conditioner also includes: a throttling device, which is arranged on the first connecting pipe and located between the third connecting pipe and the first heat exchange unit.

[0016] Furthermore, the air conditioner also includes an outdoor fan, and the second heat exchange unit is arranged on a side of the first heat exchange unit away from the outdoor fan: at least an outer surface of the first heat exchange unit is in contact with at least an outer surface of the second heat exchange unit.

[0017] Furthermore, the heat exchange area of ​​the first heat exchange unit is S1, the heat exchange area of ​​the second heat exchange unit is S2, and the ratio of S2 to S1 ranges from 0.5 to 1.

[0018] Furthermore, when the air conditioner is in defrost mode, the flow value of the first connecting pipe is Q 总 , the flow rate of the second connecting pipe is Q2, Q2 is greater than Q 总 The ratio ranges from 0.3 to 0.6.

[0019] The air conditioner of the present invention has a defrosting mode. When the defrosting mode is in operation, the first reversing component is in the first working state, the second reversing component is in the third working state, and the first heat exchange connection end of the indoor heat exchanger is connected to the second connection end of the second heat exchange unit. The refrigerant discharged from the exhaust end of the compressor enters the indoor heat exchanger for heat exchange and is divided into two paths. One path flows into the second heat exchange unit for heat exchange, and then flows into the first heat exchange unit after mixing with the other path, and finally flows to the air intake end of the compressor. The medium-temperature refrigerant flowing out of the indoor heat exchanger enters the second heat exchange unit for heat exchange with the second heat exchange unit, and the second heat exchange unit and the first heat exchange unit adjacent thereto exchange heat, so that the temperature of the first heat exchange unit and the second heat exchange unit is continuously increased, thereby melting the frost on the first heat exchange unit and the second heat exchange unit. The air conditioner defrosts in the heating mode, while ensuring that the indoor heat exchange amount and comfort are not attenuated, improving the heating efficiency during defrosting, and ensuring indoor comfort; the system is simple and easy to operate and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic structural diagram of an embodiment of an air conditioner according to the present invention is shown;

[0022] Figure 2 A schematic diagram showing an air conditioner according to the present invention in a cooling mode;

[0023] Figure 3 A schematic diagram showing an air conditioner according to the present invention in a heating mode;

[0024] Figure 4 A schematic diagram showing an air conditioner in a defrost mode according to the present invention is shown;

[0025] Figure 5 A schematic structural diagram of a second reversing component of an air conditioner according to the present invention is shown;

[0026] Figure 6 A schematic structural diagram of a third reversing component of an air conditioner according to the present invention is shown;

[0027] Figure 7 A schematic structural diagram of a first reversing component of an air conditioner according to the present invention is shown.

[0028] The above drawings include the following reference numerals:

[0029] 10. Indoor heat exchanger; 11. First heat exchange connection end; 12. Second heat exchange connection end; 20. Outdoor heat exchanger; 21. First heat exchange unit; 211. First end; 212. Second end; 22. Second heat exchange unit; 221. First connection end; 222. Second connection end; 30. Compressor; 40. Second reversing component; 41. First valve port; 42. Second valve port; 43. Third valve port; 44. Fourth valve port; 50. Third reversing component; 51. Fifth valve port; 52. Sixth valve port; 53. Seventh valve port; 60. The first connecting pipe; 70, the second connecting pipe; 80, the first flow meter; 90, the second flow meter; 100, the control valve; 110, the fourth connecting pipe; 120, the third connecting pipe; 130, the throttling device; 140, the sixth connecting pipe; 160, the first reversing component; 161, the eighth valve port; 162, the ninth valve port; 163, the tenth valve port; 164, the eleventh valve port; 170, the first branch pipe; 180, the second branch pipe; 190, the third branch pipe; 200, the fourth branch pipe; 210, the eighth connecting pipe; 5, the outdoor unit fan. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] The present invention provides an air conditioner, please refer to Figures 1 to 7 , including an indoor heat exchanger 10, an outdoor heat exchanger 20 and a compressor 30, the outdoor heat exchanger 20 including a first heat exchange unit 21 and a second heat exchange unit 22; the air conditioner also includes a first reversing component 160 and a second reversing component 40, the first reversing component 160 is connected to the second reversing component 40; the first reversing component 160 has a first working state, when the first reversing component 160 is in the first working state, the exhaust end of the compressor 30 is connected to the second heat exchange connection end 12 of the indoor heat exchanger 10 through the first reversing component 160; the second reversing component 40 has a third working state, when the second reversing component 40 is in the third working state, the first connection end 221 of the second heat exchange unit 22 is connected to the second end 212 of the first heat exchange unit 21 through the second reversing component 40; when the first reversing component 160 is in the first working state Working state and the second reversing component 40 is in the third working state, the first end 211 of the first heat exchange unit 21 is connected to the suction end of the compressor 30 through the second reversing component 40 and the first reversing component 160; the first heat exchange connection end 11 of the indoor heat exchanger 10 is connected to the second end 212 of the first heat exchange unit 21; the first heat exchange connection end 11 of the indoor heat exchanger 10 and the second connection end 222 of the second heat exchange unit 22 can be connected on and off; when the air conditioner is in the defrost mode, the first reversing component 160 is in the first working state, the second reversing component 40 is in the third working state, the first heat exchange connection end 11 of the indoor heat exchanger 10 is connected to the second connection end 222 of the second heat exchange unit 22, and when the refrigerant passes through the second heat exchange unit 22, heat is exchanged between the second heat exchange unit 22 and the first heat exchange unit 21.

[0034] The air conditioner of the present invention has a defrost mode. When the defrost mode is in operation, the first reversing component 160 is in the first working state, the second reversing component 40 is in the third working state, and the first heat exchange connection end 11 of the indoor heat exchanger 10 is connected to the second connection end 222 of the second heat exchange unit 22. The refrigerant discharged from the exhaust end of the compressor enters the indoor heat exchanger for heat exchange and is divided into two paths. One path flows into the second heat exchange unit 22 for heat exchange, and then flows into the first heat exchange unit 21 after mixing with the other path, and finally flows to the air intake end of the compressor. The medium-temperature refrigerant flowing out of the indoor heat exchanger enters the second heat exchange unit 22 for heat exchange, and the second heat exchange unit 22 is heat exchanged with the first heat exchange unit 21 adjacent thereto, so that the temperature of the first heat exchange unit 21 and the second heat exchange unit 22 is continuously increased, thereby melting the frost on the first heat exchange unit 21 and the second heat exchange unit 22. The air conditioner defrosts in heating mode while ensuring that the indoor heat exchange and comfort are not attenuated, thereby improving the heating efficiency during defrosting and ensuring indoor comfort; the system is simple and easy to operate and control.

[0035] Specifically, the first heat exchange unit 21 has two connecting ends relatively set, namely the first end 211 and the second end 212; the second heat exchange unit 22 has two connecting ends relatively set, namely the first connecting end 221 and the second connecting end 222; the indoor heat exchanger 10 has two connecting ends relatively set, namely the first heat exchange connecting end 11 and the second heat exchange connecting end 12.

[0036] In this embodiment, the first reversing component 160 has an eighth valve port 161, a ninth valve port 162, a tenth valve port 163 and an eleventh valve port 164, the eighth valve port 161 is connected to the second heat exchange connection end 12 of the indoor heat exchanger 10; the ninth valve port 162 is connected to the suction end; the tenth valve port 163 is connected to the second reversing component 40; the eleventh valve port 164 is connected to the exhaust end; wherein, when the first reversing component 160 is in the first working state, the eighth valve port 161 is connected to the eleventh valve port 164, and the ninth valve port 162 is connected to the tenth valve port 163; the first reversing component 160 also has a second working state, when the first reversing component 160 is in the second working state, the eighth valve port 161 is connected to the ninth valve port 162, and the tenth valve port 163 is connected to the eleventh valve port 164.

[0037] Specifically, when the first switching component 160 is powered on, the first switching component 160 is in the second working state; when the first switching component 160 is powered off, the first switching component 160 is in the first working state.

[0038] In this embodiment, the second reversing component 40 has a first valve port 41, a second valve port 42, a third valve port 43 and a fourth valve port 44. The first valve port 41 is connected to the second connection end 222 of the second heat exchange unit 22 or the second end 212 of the first heat exchange unit 21; the second valve port 42 is connected to the first end 211 of the first heat exchange unit 21; the third valve port 43 is connected to the tenth valve port 163; the fourth valve port 44 is connected to the first connection end 221 of the second heat exchange unit 22; wherein, when the second reversing component 40 is in the third working state, the first valve port 41 is connected to the fourth valve port 44, and the second valve port 42 is connected to the third valve port 43; the second reversing component 40 also has a fourth working state, when the second reversing component 40 is in the fourth working state, the first valve port 41 is connected to the second valve port 42, and the third valve port 43 is connected to the fourth valve port 44.

[0039] Specifically, when the second switching component 40 is powered on, the second switching component 40 is in the third working state; when the second switching component 40 is powered off, the second switching component 40 is in the fourth working state.

[0040] Specifically, the first switching component 160 and the second switching component 40 are both four-way solenoid valves.

[0041] In this embodiment, the air conditioner also includes: a third reversing component 50, the third reversing component 50 has a fifth valve port 51, a sixth valve port 52 and a seventh valve port 53, the fifth valve port 51 is connected to the first valve port 41, the sixth valve port 52 is connected to the second end 212 of the first heat exchange unit 21, and the seventh valve port 53 is connected to the second connection end 222 of the second heat exchange unit 22; wherein, the third reversing component 50 has a fifth working state and a sixth working state, when the third reversing component 50 is in the fifth working state, the fifth valve port 51 is connected to the sixth valve port 52; when the third reversing component 50 is in the sixth working state, the fifth valve port 51 is connected to the seventh valve port 53.

[0042] In this embodiment, when the air conditioner is in the defrost mode, the third reversing component 50 is in the fifth working state; the air conditioner also has a cooling mode and a heating mode; when the air conditioner is in the cooling mode, the first reversing component 160 is in the second working state, the second reversing component 40 is in the fourth working state, the third reversing component 50 is in the sixth working state, and the first heat exchange connection end 11 of the indoor heat exchanger 10 is disconnected from the second connection end 222 of the second heat exchange unit 22; when the air conditioner is in the heating mode, the first reversing component 160 is in the first working state, the second reversing component 40 is in the fourth working state, the third reversing component 50 is in the sixth working state, and the first heat exchange connection end 11 of the indoor heat exchanger 10 is disconnected from the second connection end 222 of the second heat exchange unit 22.

[0043] Specifically, the third switching component 50 is a three-way solenoid valve. When the third switching component 50 is powered on, the third switching component 50 is in the sixth working state; when the third switching component 50 is powered off, the third switching component 50 is in the fifth working state.

[0044] In this embodiment, the air conditioner also includes: a first connecting pipe 60, one end of which is connected to the first heat exchange connecting end 11 of the indoor heat exchanger 10, and the other end of the first connecting pipe 60 is connected to the second end 212 of the first heat exchange unit 21; a second connecting pipe 70, one end of which is connected to the first connecting pipe 60, and the other end of the second connecting pipe 70 is connected to the second connecting end 222 of the second heat exchange unit 22; a third connecting pipe 120, one end of which is connected to the first connecting pipe 60 and is located between the second connecting pipe 70 and the first heat exchange unit 21, and the other end of the third connecting pipe 120 is connected to the second connecting pipe 70; wherein, the third reversing component 50 is arranged on the third connecting pipe 120, and the sixth valve port 52 and the seventh valve port 53 are located on the third connecting pipe 120.

[0045] In this embodiment, the air conditioner further includes: a control valve 100 , which is disposed on the second connecting pipe 70 and located on a side of the third connecting pipe 120 away from the second heat exchange unit 22 .

[0046] Specifically, the second switching component 40 is powered on to adjust the flow rate as needed, and is powered off to be disconnected.

[0047] In this embodiment, the air conditioner further includes: a second flow meter 90, which is arranged on the second connecting pipe 70 and located on the side of the third connecting pipe 120 close to the second heat exchange unit 22. Such an arrangement can measure the flow of the second connecting pipe 70.

[0048] In this embodiment, the air conditioner further includes: a first flow meter 80, which is arranged on the first connecting pipe 60 and located between the second connecting pipe 70 and the indoor heat exchanger 10. Such an arrangement can measure the flow of the first connecting pipe 60.

[0049] In this embodiment, the air conditioner further includes: a throttling device 130, which is arranged on the first connecting pipe 60 and located between the third connecting pipe 120 and the first heat exchange unit 21. Such a setting throttles and reduces the pressure of the refrigerant entering the first heat exchange unit.

[0050] Optionally, the throttling device may be an electronic expansion valve or a capillary tube.

[0051] In this embodiment, the air conditioner further includes an outdoor fan 5, and the second heat exchange unit 22 is arranged on a side of the first heat exchange unit 21 away from the outdoor fan 5: at least the outer surface of the first heat exchange unit 21 is in contact with at least the outer surface of the second heat exchange unit 22. The first heat exchange unit 21 is close to the outdoor fan 5 on the outside, and the second heat exchange unit 22 is close to the indoor side.

[0052] Specifically, the air conditioner includes an air conditioner outdoor unit, which includes an outdoor unit housing and an outdoor unit fan disposed on the outdoor unit housing; the second heat exchange unit 22 and the first heat exchange unit 21 are both disposed in the outdoor unit housing.

[0053] Specifically, the first heat exchange unit 21 and the second heat exchange unit 22 maintain an appropriate distance or are in contact with each other.

[0054] In this embodiment, the air conditioner further includes a temperature sensing device, which is disposed on the first heat exchange unit 21 to detect the temperature of the first heat exchange unit 21 .

[0055] Optionally, the temperature sensing device is a temperature sensing bag.

[0056] In this embodiment, the air conditioner also includes a control device, which is control-connected to the temperature sensing device, the control valve, the first reversing component, the second reversing component and the third reversing component; the control device is used to control the opening of the control valve, and is also used to control the power on or off of the first reversing component, the second reversing component and the third reversing component.

[0057] Specifically, when the temperature sensing device detects that the temperature of the first heat exchange unit 21 is less than or equal to the first preset temperature, a signal is sent to the control device, and the control device controls the air conditioner to enter the defrost mode; when the temperature sensing device detects that the temperature of the first heat exchange unit 21 is greater than or equal to the second preset temperature, a signal is sent to the control device, and the control device controls the air conditioner to exit the defrost mode and enter the heating mode. Optionally, the first preset temperature is less than or equal to 0°C and greater than or equal to -10°C; the second preset temperature is greater than or equal to 5°C and less than or equal to 10°C.

[0058] In this embodiment, the heat exchange area of ​​the first heat exchange unit 21 is S1, the heat exchange area of ​​the second heat exchange unit 22 is S2, and the ratio of S2 to S1 ranges from 0.5 to 1. That is, It should be noted that if the above heat exchange unit is a tube-fin heat exchanger, the heat exchange area refers to the sum of the outer surface area of ​​the heat exchange tube and the expanded area of ​​the fin. If it is a microchannel heat exchanger, the heat exchange area refers to the sum of the outer surface area of ​​the flat tube and the expanded area of ​​the fin.

[0059] In this embodiment, when the air conditioner is in defrost mode, the flow rate value of the first connecting pipe 60 is Q 总 The flow rate of the second connecting pipe 70 is Q2, which is greater than Q 总 The ratio ranges from 0.3 to 0.6.

[0060] In specific implementation, the refrigerant flow through the first heat exchange unit and the second heat exchange unit heat exchanger is monitored by the first flow meter 80 and the second flow meter 90 respectively, and the flow into the second heat exchanger is detected and controlled by adjusting the opening of the control valve 100 so that the flow meets the following conditions. It should be noted that the method of controlling the flow through the second heat exchange unit by detecting the evaporator and condenser temperatures in the system also falls within the scope of this application if the flow calculation and measurement ratio are within the requirements. Among them, Q2 is the flow through the second heat exchange unit; Q 总为 The flow rate flowing through the first heat exchange unit is also the total flow rate of the system.

[0061] It should be noted that in the defrost mode, part of the refrigerant flowing out of the indoor heat exchanger passes through the second heat exchange unit, and then all the refrigerant passes through the first heat exchange unit together. This means that the heat exchange area of ​​the outdoor heat exchanger is reduced. If the heat exchange area and refrigerant flow rate of the second heat exchange unit cannot be reasonably designed and controlled, the heating effect of the system will also be greatly reduced. Therefore, it is very important to design and control the heat exchange area and refrigerant flow rate of the second heat exchange unit.

[0062] In specific implementation, the first valve port 41 and the fifth valve port 51 are connected via the fourth connecting pipe 110; the first end 211 of the first heat exchange unit 21 and the second valve port 42 are connected via the sixth connecting pipe 140; the first connecting end 221 of the second heat exchange unit 22 and the fourth valve port 44 are connected via the eighth connecting pipe 210.

[0063] During specific implementation, the third valve port 43 and the tenth valve port 163 are connected via the first branch pipe 170, the second heat exchange connection end 12 of the indoor heat exchanger 10 and the eighth valve port 161 are connected via the second branch pipe 180; the ninth valve port 162 and the intake end are connected via the third branch pipe 190; and the eleventh valve port 164 and the exhaust end are connected via the fourth branch pipe 200.

[0064] During specific implementation, a liquid storage tank is provided on the third branch pipe 190 .

[0065] Specifically, Figure 2 As shown, the air conditioner is in cooling mode: the refrigerant enters the eleventh valve port 164 through the exhaust end, flows out of the tenth valve port 163 and enters the third valve port 43, flows out of the fourth valve port 44 and enters the second heat exchange unit 22 for heat exchange and then enters the seventh valve port 53, flows out from the fifth valve port 51 and enters the first valve port 41, flows out from the second valve port 42 and enters the first heat exchange unit 21 and then enters the indoor heat exchanger 10 after throttling by the throttling device, flows into the eighth valve port 161 after heat exchange, flows out from the ninth valve port 162 and enters the liquid storage tank through the suction end, completing the refrigeration cycle.

[0066] Specifically, Figure 3 As shown, the air conditioner is in heating mode: the refrigerant enters the eleventh valve port 164 through the exhaust end, flows out of the eighth valve port 161 and enters the indoor heat exchanger 10 for heat exchange, then enters the first heat exchange unit 21, enters the second valve port 42, enters the fifth valve port 51 through the first valve port 41, and the refrigerant coming out of the seventh valve port 53 enters the second heat exchange unit 22, then enters the fourth valve port 44, flows out from the third valve port 43, enters the tenth valve port 163, and flows out from the ninth valve port 162 and enters the liquid storage tank of the compressor, completing the heating cycle.

[0067] Specifically, Figure 4 As shown, the air conditioner is in defrost mode: the refrigerant enters the eleventh valve port 164 through the exhaust end, flows out from the eighth valve port 161, and is divided into two paths after passing through the indoor heat exchanger 10. One path flows into the second heat exchange unit 22 through the control valve for heat exchange, and then enters the fourth valve port 44. The first valve port 41 flows out to the fifth valve port 51, and after flowing out from the sixth valve port 52, it mixes with the other refrigerant and flows into the first heat exchange unit 21 after throttling, and flows into the ninth valve port 162 through the second valve port 42, the third valve port 43, and the tenth valve port 163, and enters the compressor through the liquid storage tank.

[0068] The continuous heating seen in the patents that can be searched at present is to use part of the gas discharged from the compressor for indoor heat exchange and the other part for outdoor defrosting. The high-temperature refrigerant flowing through the room is greatly reduced, and the indoor heat exchange is greatly reduced, which greatly affects the comfort. In the defrosting mode of this application, the amount of refrigerant passing through the indoor heat exchanger is not reduced, and the indoor heat exchange is basically not attenuated. Not only can the continuous heating function be achieved, but the comfort is also not affected.

[0069] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0070] The air conditioner of the present invention has a defrost mode. When the defrost mode is in operation, the first reversing component 160 is in the first working state, the second reversing component 40 is in the third working state, and the first heat exchange connection end 11 of the indoor heat exchanger 10 is connected to the second connection end 222 of the second heat exchange unit 22. The refrigerant discharged from the exhaust end of the compressor enters the indoor heat exchanger for heat exchange and is divided into two paths. One path flows into the second heat exchange unit 22 for heat exchange, and then flows into the first heat exchange unit 21 after mixing with the other path, and finally flows to the air intake end of the compressor. The medium-temperature refrigerant flowing out of the indoor heat exchanger enters the second heat exchange unit 22 for heat exchange, and the second heat exchange unit 22 is heat exchanged with the first heat exchange unit 21 adjacent thereto, so that the temperature of the first heat exchange unit 21 and the second heat exchange unit 22 is continuously increased, thereby melting the frost on the first heat exchange unit 21 and the second heat exchange unit 22. The air conditioner defrosts in heating mode while ensuring that the indoor heat exchange and comfort are not attenuated, thereby improving the heating efficiency during defrosting and ensuring indoor comfort; the system is simple and easy to operate and control.

[0071] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0072] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air conditioner, comprising an indoor heat exchanger (10), an outdoor heat exchanger (20) and a compressor (30), characterized in that: The outdoor heat exchanger (20) comprises a first heat exchange unit (21) and a second heat exchange unit (22); the air conditioner further comprises a first reversing component (160) and a second reversing component (40), wherein the first reversing component (160) is connected to the second reversing component (40); The first reversing component (160) has a first working state. When the first reversing component (160) is in the first working state, the exhaust end of the compressor (30) is connected to the second heat exchange connection end (12) of the indoor heat exchanger (10) through the first reversing component (160); The second reversing component (40) has a third working state. When the second reversing component (40) is in the third working state, the first connecting end (221) of the second heat exchanging unit (22) is connected to the second end (212) of the first heat exchanging unit (21) through the second reversing component (40); When the first reversing component (160) is in the first working state and the second reversing component (40) is in the third working state, the first end (211) of the first heat exchange unit (21) is connected to the suction end of the compressor (30) through the second reversing component (40) and the first reversing component (160); The first heat exchange connection end (11) of the indoor heat exchanger (10) is connected to the second end (212) of the first heat exchange unit (21); the first heat exchange connection end (11) of the indoor heat exchanger (10) is connected to the second connection end (222) of the second heat exchange unit (22) in an on-off manner; When the air conditioner is in the defrost mode, the first reversing component (160) is in the first working state, the second reversing component (40) is in the third working state, the first heat exchange connection end (11) of the indoor heat exchanger (10) is connected to the second connection end (222) of the second heat exchange unit (22), and when the refrigerant passes through the second heat exchange unit (22), heat is exchanged between the second heat exchange unit (22) and the first heat exchange unit (21); The first reversing component (160) has an eighth valve port (161), a ninth valve port (162), a tenth valve port (163) and an eleventh valve port (164); the eighth valve port (161) is connected to the second heat exchange connection end (12) of the indoor heat exchanger (10); the ninth valve port (162) is connected to the air intake end; the tenth valve port (163) is connected to the second reversing component (40); and the eleventh valve port (164) is connected to the air discharge end; wherein, in the first reversing component When the first reversing component (160) is in the first working state, the eighth valve port (161) is connected to the eleventh valve port (164), and the ninth valve port (162) is connected to the tenth valve port (163); the first reversing component (160) also has a second working state. When the first reversing component (160) is in the second working state, the eighth valve port (161) is connected to the ninth valve port (162), and the tenth valve port (163) is connected to the eleventh valve port (164); The heat exchange area of ​​the first heat exchange unit (21) is S1, the heat exchange area of ​​the second heat exchange unit (22) is S2, and the ratio of S2 to S1 ranges from 0.5 to 1.

2. The air conditioner according to claim 1, characterized in that: The second reversing component (40) comprises a first valve port (41), a second valve port (42), a third valve port (43) and a fourth valve port (44); the first valve port (41) is connected to the second connecting end (222) of the second heat exchange unit (22) or the second end (212) of the first heat exchange unit (21); the second valve port (42) is connected to the first end (211) of the first heat exchange unit (21); the third valve port (43) is connected to the tenth valve port (163); and the fourth valve port (44) is connected to the first connecting end (221) of the second heat exchange unit (22); Wherein, when the second reversing component (40) is in the third working state, the first valve port (41) is connected to the fourth valve port (44), and the second valve port (42) is connected to the third valve port (43); the second reversing component (40) also has a fourth working state, when the second reversing component (40) is in the fourth working state, the first valve port (41) is connected to the second valve port (42), and the third valve port (43) is connected to the fourth valve port (44).

3. The air conditioner according to claim 2, characterized in that: The air conditioner also includes: a third reversing component (50), the third reversing component (50) having a fifth valve port (51), a sixth valve port (52) and a seventh valve port (53), the fifth valve port (51) being in communication with the first valve port (41), the sixth valve port (52) being in communication with the second end (212) of the first heat exchange unit (21), and the seventh valve port (53) being in communication with the second connecting end (222) of the second heat exchange unit (22); The third reversing component (50) has a fifth working state and a sixth working state. When the third reversing component (50) is in the fifth working state, the fifth valve port (51) is connected to the sixth valve port (52); when the third reversing component (50) is in the sixth working state, the fifth valve port (51) is connected to the seventh valve port (53).

4. The air conditioner according to claim 3, characterized in that: When the air conditioner is in the defrosting mode, the third reversing component (50) is in the fifth working state; the air conditioner also has a cooling mode and a heating mode; When the air conditioner is in the cooling mode, the first reversing component (160) is in the second working state, the second reversing component (40) is in the fourth working state, the third reversing component (50) is in the sixth working state, and the first heat exchange connection end (11) of the indoor heat exchanger (10) is disconnected from the second connection end (222) of the second heat exchange unit (22); When the air conditioner is in the heating mode, the first reversing component (160) is in the first working state, the second reversing component (40) is in the fourth working state, the third reversing component (50) is in the sixth working state, and the first heat exchange connection end (11) of the indoor heat exchanger (10) is disconnected from the second connection end (222) of the second heat exchange unit (22).

5. The air conditioner according to claim 3, characterized in that: The air conditioner also includes: A first connecting pipe (60), one end of the first connecting pipe (60) being connected to a first heat exchange connecting end (11) of the indoor heat exchanger (10), and the other end of the first connecting pipe (60) being connected to a second end (212) of the first heat exchange unit (21); a second connecting pipe (70), one end of the second connecting pipe (70) being connected to the first connecting pipe (60), and the other end of the second connecting pipe (70) being connected to a second connecting end (222) of the second heat exchange unit (22); a third connecting pipe (120), one end of the third connecting pipe (120) being connected to the first connecting pipe (60) and being located between the second connecting pipe (70) and the first heat exchange unit (21), and the other end of the third connecting pipe (120) being connected to the second connecting pipe (70); Wherein, the third reversing component (50) is arranged on the third connecting pipe (120), and the sixth valve port (52) and the seventh valve port (53) are located on the third connecting pipe (120).

6. The air conditioner according to claim 5, characterized in that: The air conditioner also includes: A control valve (100) is arranged on the second connecting pipe (70) and is located on a side of the third connecting pipe (120) away from the second heat exchange unit (22).

7. The air conditioner according to claim 5, characterized in that: The air conditioner also includes: The second flow meter (90) is arranged on the second connecting pipe (70) and is located on a side of the third connecting pipe (120) close to the second heat exchange unit (22).

8. The air conditioner according to claim 5, characterized in that: The air conditioner also includes: A first flow meter (80) is arranged on the first connecting pipe (60) and is located between the second connecting pipe (70) and the indoor heat exchanger (10).

9. The air conditioner according to claim 5, characterized in that: The air conditioner also includes: A throttling device (130) is arranged on the first connecting pipe (60) and is located between the third connecting pipe (120) and the first heat exchange unit (21).

10. The air conditioner according to any one of claims 1 to 9, characterized in that: The air conditioner further comprises an outdoor fan (5), and the second heat exchange unit (22) is arranged on a side of the first heat exchange unit (21) away from the outdoor fan (5): at least an outer surface of the first heat exchange unit (21) and at least an outer surface of the second heat exchange unit (22) are in contact with each other.

11. The air conditioner according to any one of claims 5 to 9, characterized in that: When the air conditioner is in the defrosting mode, the flow value of the first connecting pipe (60) is Q 总 The flow rate of the second connecting pipe (70) is Q2, which is greater than Q 总 The ratio ranges from 0.3 to 0.6.

Images