Air conditioner

Abstract

The utility model provides an air conditioner which comprises a refrigerant loop in which a refrigerant circulates through a compressor, an outdoor heat exchanger, a throttling device and an indoor heat exchanger in sequence; the outdoor heat exchanger comprises a plurality of pipeline ports arranged on the outdoor heat exchanger; the first heat exchange flow path is located at the bottom of the outdoor heat exchanger, a refrigerant circulates in the first heat exchange flow path, and the first heat exchange flow path penetrates through at least part of the pipeline port; the first heat exchange flow path comprises a first refrigerant inlet pipe and a second refrigerant inlet pipe, wherein the first refrigerant inlet pipe is correspondingly connected to the pipeline port close to the bottom of the outdoor heat exchanger; and in the defrosting state, a refrigerant flows out of the compressor, sequentially passes through the first refrigerant inlet pipe to flow through the first heat exchange flow path, passes through the throttling device and the indoor heat exchanger and then flows back to the compressor, so that the defrosting efficiency of the bottom of the outdoor heat exchanger is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an air conditioner. Background Art

[0002] At present, with the improvement of people's living standards, people have put forward higher and higher requirements for the living environment. In order to maintain a comfortable ambient temperature, air conditioners have become an indispensable equipment in people's lives. However, during the operation of air conditioners, frost is prone to occur.

[0003] An air conditioner in the related art includes a compressor, an indoor heat exchanger, a throttling device and an outdoor heat exchanger, wherein the throttling device is arranged on a pipeline between the indoor heat exchanger and the outdoor heat exchanger.

[0004] In the related technology, a subcooling section is provided at the bottom of the outdoor heat exchanger. During heating operation, the refrigerant enters the subcooling section first, and the temperature of the subcooling section is relatively high, which can effectively prevent frost from forming on the bottom of the heat exchanger. However, the consequence of this measure is that the circulating refrigerant of the entire machine must pass through the subcooling section to reach the liquid separator. The refrigerant flow rate in the subcooling section is very fast and the pressure drop is very large, resulting in a serious reduction in the heating capacity and energy efficiency of the air-conditioning unit.

[0005] In the related art, an electronic expansion valve is placed in the middle of the outdoor heat exchanger to ensure that high-temperature refrigerant flows in the refrigerant pipe of the outdoor heat exchanger in front of the electronic expansion valve, thereby avoiding frost on the bottom of the heat exchanger. However, this measure causes the surface of the outdoor heat exchanger in front of the electronic expansion valve to be higher than the air temperature and thus cannot absorb heat normally, resulting in the heat exchanger not being able to fully exert its heat exchange capacity.

[0006] In view of this, the present utility model is proposed. Utility Model Content

[0007] Problems to be solved by the utility model

[0008] The purpose of the present utility model is to solve the above-mentioned problems and other problems.

[0009] Another purpose of the utility model may be to solve the problem of frost on the bottom of the outdoor heat exchanger during heating.

[0010] Another object of the present invention may be to improve the defrosting efficiency of the bottom of the outdoor heat exchanger.

[0011] Another object of the present invention may be to reduce the time of the defrosting operation.

[0012] Another purpose of the present invention may be to improve the heat exchange efficiency between the outdoor heat exchanger and the air.

[0013] Problems of the present invention are not limited to the above-mentioned problems, and those skilled in the art can clearly understand other problems not mentioned from the following description.

[0014] Technical solutions to the problem

[0015] According to an embodiment of the present disclosure, there is provided an air conditioner, comprising:

[0016] A refrigerant circuit in which the refrigerant circulates sequentially through the compressor, the outdoor heat exchanger, the throttling device, and the indoor heat exchanger;

[0017] The outdoor heat exchanger comprises:

[0018] A plurality of pipeline openings are arranged on the outdoor heat exchanger;

[0019] A first heat exchange flow path, which is located at the bottom of the outdoor heat exchanger, has refrigerant flowing therein, and penetrates at least a portion of the pipeline opening;

[0020] The first heat exchange flow path comprises:

[0021] A first refrigerant inlet pipe, which is correspondingly connected to the pipeline opening near the bottom of the outdoor heat exchanger;

[0022] In the defrosting state, the refrigerant flows out of the compressor, passes through the first refrigerant inlet pipe in sequence to flow through the first heat exchange flow path, and flows back to the compressor after passing through the throttling device and the indoor heat exchanger.

[0023] This embodiment also provides an air conditioner, comprising:

[0024] A refrigerant circuit in which the refrigerant circulates sequentially through the compressor, the outdoor heat exchanger, the throttling device, and the indoor heat exchanger;

[0025] The outdoor heat exchanger comprises:

[0026] A plurality of pipeline openings are arranged on the outdoor heat exchanger;

[0027] A first heat exchange flow path, which is located at the bottom of the outdoor heat exchanger, has refrigerant flowing therein, and penetrates at least a portion of the pipeline opening;

[0028] The first heat exchange flow path comprises:

[0029] A first refrigerant inlet pipe, which is correspondingly connected to the pipeline opening near the bottom of the outdoor heat exchanger;

[0030] A second refrigerant inlet pipe, which is correspondingly connected to the pipeline opening near the bottom of the outdoor heat exchanger;

[0031] A first refrigerant outlet pipe, which is connected to the first refrigerant inlet pipe and the second refrigerant inlet pipe respectively;

[0032] In the heating state, the refrigerant flows out of the compressor, passes through the indoor heat exchanger and the throttling device in sequence and flows to the first refrigerant outlet pipe, and then flows back to the compressor after being split through the first refrigerant inlet pipe and the second refrigerant inlet pipe.

[0033] In some embodiments of the present application, the outdoor heat exchanger further includes:

[0034] The second heat exchange flow path is located at the top of the first heat exchange flow path, has refrigerant flowing therein, and penetrates at least a portion of the pipeline openings. The first heat exchange flow path and the second heat exchange flow path are arranged in parallel in the refrigerant circuit.

[0035] In some embodiments of the present application, the second refrigerant inlet pipe is correspondingly connected to the pipeline opening adjacent to the first refrigerant inlet pipe.

[0036] In some embodiments of the present application, the outdoor heat exchanger comprises:

[0037] A heat exchanger end plate, which is arranged at two opposite ends of the outdoor heat exchanger, and a plurality of pipeline openings are arranged on the heat exchanger end plate;

[0038] In the height direction of the heat exchanger, at least one horizontal row of the pipeline openings is provided on the end plate of the heat exchanger, and each horizontal row of the pipeline openings may include at least one pipeline opening.

[0039] In some embodiments of the present application, the first refrigerant inlet pipe is correspondingly connected to any pipeline opening in the lowest horizontal row of the outdoor heat exchanger.

[0040] In some embodiments of the present application, the second refrigerant inlet pipe is correspondingly connected to any pipeline opening in the lowest horizontal row of the outdoor heat exchanger; or

[0041] The second refrigerant inlet pipe is correspondingly connected to any pipeline opening on a horizontal row adjacent to the lowest horizontal row of the outdoor heat exchanger.

[0042] In some embodiments of the present application, the first refrigerant outlet pipe is correspondingly connected to any pipeline opening in a horizontal row above the first refrigerant inlet pipe and the second refrigerant inlet pipe.

[0043] In some embodiments of the present application, the number of the pipeline openings through which the first heat exchange flow path passes is greater than the number of the pipeline openings through which the second heat exchange flow path passes.

[0044] In some embodiments of the present application, the outdoor heat exchanger comprises:

[0045] A bend portion is connected to the pipeline opening correspondingly, two pipeline openings are connected to one bend portion correspondingly, at least one bend portion is respectively provided in the first heat exchange flow path and the second heat exchange flow path, and the number of the bend portions in the first heat exchange flow path is greater than the number of the bend portions in the second heat exchange flow path.

[0046] Utility Model Effect

[0047] According to at least one of the embodiments of the present invention, the first heat exchange flow path is arranged at the bottom of the outdoor heat exchanger. During defrosting, the high-temperature and high-pressure refrigerant preferentially flows through the bottom of the outdoor heat exchanger, which can improve the defrosting efficiency of the bottom of the outdoor heat exchanger.

[0048] According to at least one of the embodiments of the present invention, the first heat exchange flow path is arranged at the bottom of the outdoor heat exchanger. During defrosting, the high-temperature and high-pressure refrigerant flows preferentially through the bottom of the outdoor heat exchanger, which can reduce the defrosting time.

[0049] According to at least one of the embodiments of the utility model, the number of pipe openings passing through the first heat exchange flow path is greater than the number of pipe openings passing through the second heat exchange flow path, which can increase the flow path of the refrigerant in the first heat exchange flow path. During heating, the refrigerant can be more completely converted into gaseous refrigerant and flow out through the first refrigerant inlet pipe and the second refrigerant inlet pipe. The temperature of the gaseous refrigerant is higher, which can avoid frost on the bottom of the outdoor heat exchanger.

[0050] The effects of the present invention are not limited to the above-mentioned effects, and those skilled in the art can clearly understand other effects not mentioned from the description of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 is a structural diagram of an air conditioner according to an embodiment of the present application;

[0053] Figure 2 is a block diagram of an air conditioner according to an embodiment of the present application;

[0054] Figure 3 The structure of one end of the outdoor heat exchanger of the air conditioner according to the embodiment of the present application Figure 1 ;

[0055] Figure 4The structure of one end of the outdoor heat exchanger of the air conditioner according to the embodiment of the present application Figure 2 ;

[0056] Figure 5 is a partial structural diagram of one end of an outdoor heat exchanger of an air conditioner according to an embodiment of the present application;

[0057] Figure 6 yes Figure 4 A magnified view of the defrost cycle in section A;

[0058] Figure 7 The structure of one end of the outdoor heat exchanger of the air conditioner when heating according to the embodiment of the present application Figure 1 ;

[0059] Figure 8 The structure of one end of the outdoor heat exchanger of the air conditioner when heating according to the embodiment of the present application Figure 2 ;

[0060] Fig. 9 is a partial structural diagram of an outdoor heat exchanger of an air conditioner during heating according to an embodiment of the present application;

[0061] Fig.10 yes Figure 7 Enlarged view of the heating cycle in part B.

[0062] Figure numerals: air conditioner 1000; air conditioner indoor unit 100; indoor heat exchanger 1001; air conditioner outdoor unit 200; compressor 201; outdoor heat exchanger 202; throttling device 204; pipeline opening 31; first heat exchange flow path 32; first refrigerant inlet pipe 321; second refrigerant inlet pipe 322; first refrigerant outlet pipe 323; second heat exchange flow path 33; heat exchanger end plate 34. DETAILED DESCRIPTION

[0063] Some embodiments of the present disclosure will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments provided by the present disclosure are within the scope of protection of the present disclosure.

[0064] This embodiment provides an air conditioner. Figure 1-Figure 10 The air conditioner 1000 may include an air conditioner indoor unit 100 and an air conditioner outdoor unit 200. The air conditioner indoor unit 100 is installed in an indoor space. The air conditioner outdoor unit 200 is installed in an outdoor space for heat exchange with an outdoor environment.

[0065] The air conditioner indoor unit 100 includes a casing, which is arranged in the indoor space. A first cavity is arranged in the casing. A heat exchange air inlet is arranged on the casing, and the heat exchange air inlet is communicated with the indoor space.

[0066] The casing is provided with a heat exchange air outlet, the heat exchange air outlet is connected to the indoor space, and the heat exchange air inlet and the heat exchange air outlet are connected to the first cavity.

[0067] The air conditioner indoor unit 100 may include an indoor heat exchanger 1001 , in which refrigerant flows. The refrigerant can be used to exchange heat with the air entering the first cavity and flowing through the indoor heat exchanger 1001 .

[0068] In some embodiments, the housing has a top and a bottom, and the height direction of the housing is from the bottom of the housing to the top of the housing. The housing also has a width direction, wherein the width direction of the housing is from one side of the housing in the left-right direction to the other side thereof. The housing has a front side and a rear side that are arranged oppositely, and the front side, the rear side, the left side, and the right side of the housing are the circumferential sides of the housing.

[0069] In some embodiments, the air conditioner outdoor unit 200 is disposed in an outdoor space, and the air conditioner outdoor unit 200 includes a housing, a second cavity is disposed in the housing, and an outdoor air inlet and an outdoor air outlet are disposed on the housing. The outdoor air inlet is connected to the outdoor space and the second cavity, and the outdoor air outlet is connected to the outdoor space and the second cavity.

[0070] In some embodiments, an outdoor heat exchanger 202 is disposed in the shell, and refrigerant flows in the outdoor heat exchanger 202 . The refrigerant in the outdoor heat exchanger 202 can be used to exchange heat with the air entering the second cavity and flowing through the outdoor heat exchanger 202 .

[0071] In some embodiments, a compressor 201 is disposed in the shell, the compressor 201 is disposed in the second chamber, and the compressor 201 is installed at the bottom of the air-conditioning outdoor unit 200 .

[0072] In some embodiments, the air-conditioning outdoor unit 200 may include a throttling device 204, which may be disposed in the second cavity to expand the liquid refrigerant in a high-temperature and high-pressure state into a low-pressure liquid refrigerant. The throttling device 204 may be disposed on the leeward side of the outdoor heat exchanger 202, so as to be conveniently connected to the compressor 201.

[0073] The air conditioner 1000 performs a cooling cycle, a heating cycle, and a defrosting cycle of the air conditioner 1000 by using the compressor 201 , the outdoor heat exchanger 202 , the throttling device 204 , and the indoor heat exchanger 1001 .

[0074] The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the air that has been conditioned and heat exchanged.

[0075] The compressor 201 compresses the low-temperature and low-pressure refrigerant gas and discharges the high-temperature and high-pressure refrigerant gas. The discharged refrigerant gas flows into the outdoor heat exchanger 202 .

[0076] The outdoor heat exchanger 202 condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0077] The throttling device 204 expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the outdoor heat exchanger 202 into a low-pressure liquid-phase refrigerant.

[0078] The indoor heat exchanger 1001 evaporates the refrigerant expanded in the throttling device 204 and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor 201 .

[0079] The indoor heat exchanger 1001 can achieve a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the entire cycle, the air conditioner 1000 can adjust the temperature of the indoor space.

[0080] During the heating cycle, the compressor 201 compresses the low-temperature and low-pressure refrigerant gas and discharges the high-temperature and high-pressure refrigerant gas. The discharged refrigerant gas flows into the indoor heat exchanger 1001 .

[0081] The indoor heat exchanger 1001 condenses the compressed refrigerant into a liquid phase, and the heat is exchanged with the indoor air through the condensation process to achieve a heating effect.

[0082] The throttling device 204 expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the indoor heat exchanger 1001 into a low-pressure liquid-phase refrigerant.

[0083] The outdoor heat exchanger 202 evaporates the refrigerant expanded in the throttling device 204 and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor 201 .

[0084] During the entire cycle, the air conditioner 1000 can increase the temperature of the indoor space by heating.

[0085] The refrigerant flow path of the defrost cycle is the same as that of the refrigeration cycle and will not be repeated here.

[0086] In both the indoor heat exchanger 1001 and the outdoor heat exchanger 202, one is a condenser and the other is an evaporator. When the indoor heat exchanger 1001 is used as a condenser and the outdoor heat exchanger 202 is used as an evaporator, the air conditioner 1000 is used as a heater in the heating mode. When the indoor heat exchanger 1001 is used as an evaporator and the outdoor heat exchanger 202 is used as a condenser, the air conditioner 1000 is used as a cooler in the cooling mode.

[0087] When the air conditioner is in heating mode, the surface temperature of the outdoor heat exchanger is lower than the dew point temperature of the air, which will cause the water vapor in the air to liquefy and precipitate on the cold surface of the outdoor heat exchanger. The condensed water after precipitation will accumulate at the bottom of the outdoor heat exchanger. If the condensed water at the bottom of the outdoor heat exchanger cannot be discharged in time, it will frost at the bottom of the outdoor heat exchanger, affecting the heat exchange efficiency of the outdoor heat exchanger.

[0088] To solve the above problems, an air conditioner is proposed in an embodiment of the present disclosure.

[0089] Refer to the attached Figure 1-10 In some embodiments, the air conditioner may include a refrigerant circuit in which the refrigerant circulates sequentially through a compressor, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger.

[0090] In some embodiments, both the indoor heat exchanger and the outdoor heat exchanger are connected to the compressor via a four-way valve.

[0091] In some embodiments, the throttling device can be configured as an electronic expansion valve, and in the heating mode, the throttling device can expand the liquid refrigerant that has undergone the condensation process into a low-pressure liquid refrigerant. In the cooling mode, the throttling device can expand the liquid refrigerant that has undergone the condensation process into a low-pressure liquid refrigerant.

[0092] In some embodiments, the compressor includes an air intake port and an air exhaust port. The refrigerant that absorbs heat and undergoes an evaporation process enters the compressor from the air intake port. The compressor compresses the gaseous refrigerant into a high-temperature and high-pressure state and then discharges it from the exhaust port.

[0093] The indoor heat exchanger and the outdoor heat exchanger are respectively connected to the compressor through a four-way valve in the refrigerant circuit, and the four-way valve includes a first valve port, a second valve port, a third valve port and a fourth valve port. Among them, the air intake of the compressor is fixedly connected to the first valve port, the air discharge port of the compressor is fixedly connected to the third valve port, the second valve port is connected to the indoor heat exchanger, and the fourth valve port is connected to the outdoor heat exchanger.

[0094] When the air conditioner is in cooling mode, the first valve port is connected to the second valve port, and the third valve port is connected to the fourth valve port.

[0095] When the air conditioner is in a heating mode, the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port.

[0096] In some embodiments, the outdoor heat exchanger may include a plurality of pipeline openings 31 , and the pipeline openings 31 may be used to set up a refrigerant circuit, and the refrigerant circuit passes through the pipeline openings 31 .

[0097] In some embodiments, the outdoor heat exchanger may include a first heat exchange path 32, which is located at the bottom of the outdoor heat exchanger. Refrigerant flows inside the first heat exchange path 32. The first heat exchange path 32 passes through at least a portion of the pipeline opening 31. The first heat exchange path 32 is part of the refrigerant circuit.

[0098] In some embodiments, the first heat exchange flow path 32 may include a first refrigerant inlet pipe 321 , and the first refrigerant inlet pipe 321 is correspondingly connected to the pipeline opening 31 near the bottom of the outdoor heat exchanger.

[0099] In the defrosting state, the refrigerant flows out of the compressor, passes through the first refrigerant inlet pipe 321 in sequence to flow through the first heat exchange flow path 32, and flows back to the compressor after passing through the throttling device and the indoor heat exchanger.

[0100] In the defrost state, the refrigerant preferentially flows through the first refrigerant inlet pipe 321 at the bottom of the outdoor heat exchanger, so that the refrigerant gas in a high-temperature and high-pressure state compressed and discharged by the compressor is preferentially defrosted to the bottom of the outdoor heat exchanger with serious frosting problems, thereby improving the defrost efficiency and reducing the defrost operation time.

[0101] In the heating state, the refrigerant flowing out of the compressor can flow to the throttling device through the first heat exchange flow path 32, and then flow back to the compressor after passing through the indoor heat exchanger.

[0102] In the heating state, the throttling device causes the high-temperature and high-pressure liquid refrigerant condensed in the indoor heat exchanger to expand into a low-pressure liquid refrigerant. In the process of flowing through the first heat exchange flow path 32, the liquid refrigerant gradually evaporates into a gaseous refrigerant. In this process, low-pressure liquid refrigerant and gaseous refrigerant can coexist, and the temperature of the refrigerant gradually increases. Finally, the refrigerant is completely transformed into a gaseous refrigerant and discharged through the first refrigerant inlet pipe 321 located at the bottom of the outdoor heat exchanger. The temperature of the bottom of the outdoor heat exchanger can be increased during heating to avoid frost on the bottom of the outdoor heat exchanger.

[0103] In some embodiments, the first heat exchange flow path 32 may include a second refrigerant inlet pipe 322 , and the second refrigerant inlet pipe 322 is correspondingly connected to the pipeline opening 31 near the bottom of the outdoor heat exchanger.

[0104] The first heat exchange flow path 32 may include a first refrigerant outlet pipe 323 , and the first refrigerant outlet pipe 323 is connected to the first refrigerant inlet pipe 321 and the second refrigerant inlet pipe 322 , respectively.

[0105] In the heating state, the refrigerant flows out of the compressor, passes through the indoor heat exchanger and the throttling device in sequence and flows to the first refrigerant outlet pipe 323, and then flows back to the compressor after being split by the first refrigerant inlet pipe 321 and the second refrigerant inlet pipe 322.

[0106] In the heating state, the throttling device causes the high-temperature and high-pressure liquid refrigerant condensed in the indoor heat exchanger to expand into a low-pressure liquid refrigerant. In the process of flowing through the first heat exchange flow path 32, the liquid refrigerant gradually evaporates into a gaseous refrigerant. During this process, low-pressure liquid refrigerant and gaseous refrigerant can coexist, and the temperature of the refrigerant gradually increases.

[0107] When the liquid refrigerant is converted into a gaseous refrigerant, the flow rate of the refrigerant increases, and the pressure drop increases, which is not conducive to the heat exchange of the outdoor evaporator. In this embodiment, the first refrigerant inlet pipe 321 and the second refrigerant inlet pipe 322 are arranged in parallel, which can reduce the flow rate of the refrigerant, reduce the pressure drop, improve the heat exchange effect on the bottom of the outdoor heat exchanger, and avoid frost on the bottom of the outdoor heat exchanger. Finally, the refrigerant is completely converted into a gaseous refrigerant and discharged through the first refrigerant inlet pipe 321 and the second refrigerant inlet pipe 322 respectively, which can increase the temperature of the bottom of the outdoor heat exchanger when the air conditioner is heating, and avoid frost on the bottom of the outdoor heat exchanger.

[0108] In the defrost state, the refrigerant flows out of the compressor, passes through the first refrigerant inlet pipe 321 and the second refrigerant inlet pipe 322 respectively, converges in the first refrigerant outlet pipe 323 to flow through the first heat exchange path 32, and flows back to the compressor after passing through the throttling device and the indoor heat exchanger.

[0109] In the defrost state, the refrigerant preferentially flows through the first refrigerant inlet pipe 321 and the second refrigerant inlet pipe 322 at the bottom of the outdoor heat exchanger, so that the refrigerant gas in a high-temperature and high-pressure state compressed and discharged by the compressor is preferentially defrosted to the bottom of the outdoor heat exchanger where the frosting problem is serious, thereby improving the defrost efficiency and reducing the defrost operation time.

[0110] In some embodiments, the first heat exchange flow path 32 is provided with a first refrigerant outlet pipe 323. During heating, the refrigerant flowing into the first refrigerant outlet pipe 323 is liquid refrigerant, and the flow rate of the liquid refrigerant is slow. Only one first refrigerant outlet pipe 323 is provided to increase the pressure drop and promote the heat exchange effect of the outdoor heat exchanger.

[0111] In some embodiments, the outdoor heat exchanger may include a second heat exchange path 33, the second heat exchange path 33 is located on the top of the first heat exchange path 32, a refrigerant flows inside the second heat exchange path 33, and the second heat exchange path 33 is penetrated by at least part of the pipeline opening 31.

[0112] The first heat exchange flow path 32 and the second heat exchange flow path 33 are arranged in parallel in the refrigerant circuit, so that the refrigerant flowing into the outdoor heat exchanger flows evenly through the outdoor heat exchanger, making the surface temperature of the outdoor heat exchanger more uniform.

[0113] In some embodiments, the number of the pipe openings 31 provided in the first heat exchange flow path 32 is greater than the number of the pipe openings provided in the second heat exchange flow path 33, which can increase the flow path of the refrigerant in the first heat exchange flow path 32, so that the flow path of the first heat exchange flow path 32 is longer than the second heat exchange flow path 33. When heating, the refrigerant can be more completely converted into gaseous refrigerant to flow out through the first refrigerant inlet pipe 321 and the second refrigerant inlet pipe 322. The temperature of the gaseous refrigerant flowing through the first refrigerant inlet pipe 321 and the second refrigerant inlet pipe 322 is higher, which can avoid frost on the bottom of the outdoor heat exchanger.

[0114] In some embodiments, the outdoor heat exchanger may include a bend portion, the bend portion is connected to the pipeline opening 31 correspondingly, and two pipeline openings 31 are connected to one bend portion correspondingly.

[0115] In some embodiments, the curved pipe portion may be a U-shaped curved pipe, one end of the U-shaped curved pipe is connected to one of the pipeline openings 31 , and the other end of the U-shaped curved pipe may be connected to another pipeline opening 31 .

[0116] In some embodiments, at least one elbow is provided in each of the first heat exchange flow path 32 and the second heat exchange flow path 33, and the number of the elbows in the first heat exchange flow path 32 is greater than the number of the elbows in the second heat exchange flow path 33, so that the flow path of the refrigerant in the first heat exchange flow path 32 increases, and the flow path of the first heat exchange flow path 32 is longer than that of the second heat exchange flow path 33. During heating, the refrigerant can be more completely converted into a gaseous refrigerant to flow out through the first refrigerant inlet pipe 321 and the second refrigerant inlet pipe 322, and the temperature of the gaseous refrigerant flowing through the first refrigerant inlet pipe 321 and the second refrigerant inlet pipe 322 is higher, which can avoid frost on the bottom of the outdoor heat exchanger.

[0117] In some embodiments, the second refrigerant inlet pipe 322 is correspondingly connected to the pipeline opening 31 adjacent to the first refrigerant inlet pipe 321. The first refrigerant inlet pipe 321 and the second refrigerant inlet pipe 322 are arranged adjacent to each other, so that the refrigerant preferentially flows through the bottom end of the outdoor heat exchanger during defrosting. The layout of the refrigerant circuit is reasonably arranged, so that it is more convenient to lead out the first refrigerant inlet pipe 321 and the second refrigerant inlet pipe 322 at the same time, making the refrigerant layout more reasonable.

[0118] In some embodiments, the outdoor heat exchanger may include a heat exchanger end plate 34, which may be respectively arranged at two opposite ends of the outdoor heat exchanger. A plurality of pipeline openings are arranged on the heat exchanger end plate 34, the first heat exchange flow path 32 passes through at least a portion of the pipeline opening 31, and the second heat exchange flow path 33 passes through at least a portion of the pipeline opening 31.

[0119] In some embodiments, at least one horizontal row of pipeline openings is provided on the heat exchanger end plate 34 in the height direction of the heat exchanger, and each horizontal row of pipeline openings may include at least one pipeline opening.

[0120] In some embodiments, the pipe openings on adjacent horizontal rows are staggered with each other, which can increase the refrigerant flow in the space and improve the heat exchange effect of the outdoor heat exchanger.

[0121] In some embodiments, the first refrigerant inlet pipe 321 is correspondingly connected to any pipe opening in the lowest horizontal row of the outdoor heat exchanger, so that the first refrigerant inlet pipe 321 is arranged at a position close to the bottom end of the outdoor heat exchanger, which can enhance the defrosting effect on the bottom end of the outdoor heat exchanger, improve the defrosting efficiency of the outdoor heat exchanger, and thereby reduce the defrosting time of the outdoor heat exchanger.

[0122] In some embodiments, the second refrigerant inlet pipe 322 is correspondingly connected to any pipe opening on the adjacent horizontal row to the bottom horizontal row of the outdoor heat exchanger, so that the second refrigerant inlet pipe 322 is arranged at a position close to the bottom end of the outdoor heat exchanger, which can enhance the defrosting effect on the bottom end of the outdoor heat exchanger, improve the defrosting efficiency of the outdoor heat exchanger, and thereby reduce the defrosting time of the outdoor heat exchanger.

[0123] In some embodiments, the second refrigerant inlet pipe 322 is correspondingly connected to any pipe opening in the lowest horizontal row of the outdoor heat exchanger, so that the second refrigerant inlet pipe 322 is arranged at a position close to the bottom end of the outdoor heat exchanger, further enhancing the defrosting effect on the bottom end of the outdoor heat exchanger, improving the defrosting efficiency of the outdoor heat exchanger, and thereby reducing the defrosting time of the outdoor heat exchanger.

[0124] In some embodiments, the first refrigerant outlet pipe 323 is correspondingly connected to any pipeline opening in the horizontal row above the first refrigerant inlet pipe 321 and the second refrigerant inlet pipe 322. The first refrigerant outlet pipe 323 does not occupy the bottom of the outdoor heat exchanger, thereby improving the flow path of the first refrigerant inlet pipe 321 and the second refrigerant inlet pipe 322 at the bottom of the outdoor heat exchanger, enhancing the defrosting effect on the bottom end of the outdoor heat exchanger, improving the defrosting efficiency of the outdoor heat exchanger, and thereby reducing the defrosting time of the outdoor heat exchanger.

[0125] In some embodiments, the outdoor heat exchanger may include fins, which are disposed between two heat exchange end plates at opposite ends of the outdoor heat exchanger. The fins are provided with flow path holes, which are arranged corresponding to the pipeline openings.

[0126] The first heat exchange flow path 32 may be provided with pipeline openings and flow path holes to connect fins. The fins may increase the heat exchange space and improve the heat exchange effect of the outdoor heat exchanger.

[0127] In some embodiments, the first refrigerant inlet pipe 321 , the second refrigerant inlet pipe 322 and the first refrigerant outlet pipe 323 are connected via a three-way pipe.

[0128] In some embodiments, a plurality of first heat exchange paths 32 may be provided, and a plurality of second heat exchange paths 33 are provided in parallel in the refrigerant circuit.

[0129] In some embodiments, the outdoor heat exchanger may include an air collecting pipe connected to the first refrigerant inlet pipe 321 and the second refrigerant inlet pipe 322 .

[0130] In some embodiments, the outdoor heat exchanger may include a liquid separation joint, one end of which is connected to the first heat exchange flow path 32 and the second heat exchange flow path 33 respectively, and the other end of which is connected to the throttling device.

[0131] When executing the defrost cycle, the refrigerant flows out from the compressor to the collecting pipe of the outdoor heat exchanger, and the refrigerant flows through the first heat exchange path 32 and the second heat exchange path 33 in sequence. After the refrigerant converges in the separator, it flows back to the compressor after passing through the throttling device and the indoor heat exchanger.

[0132] When executing the heating cycle, the refrigerant flows out of the compressor, passes through the indoor heat exchanger and the throttling device in sequence and flows to the liquid separation head, where it is divided into the first heat exchange flow path 32 and the second heat exchange flow path 33. The refrigerant converges in the collecting pipe and then flows back to the compressor.

[0133] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0134] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0135] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0136] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0137] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0138] The use of "adapted to" or "configured to" herein is meant to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0139] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of variation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0140] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within the acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism may be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity may also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality may be, for example, the difference between the two equalities is less than or equal to 5% of either one.

[0141] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0142] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An air conditioner, characterized in that: include: A refrigerant circuit in which the refrigerant circulates sequentially through the compressor, the outdoor heat exchanger, the throttling device, and the indoor heat exchanger; The outdoor heat exchanger comprises: A plurality of pipeline openings are arranged on the outdoor heat exchanger; A first heat exchange flow path, which is located at the bottom of the outdoor heat exchanger, has refrigerant flowing therein, and penetrates at least a portion of the pipeline opening; The first heat exchange flow path comprises: A first refrigerant inlet pipe, which is correspondingly connected to the pipeline opening near the bottom of the outdoor heat exchanger; In the defrosting state, the refrigerant flows out of the compressor, passes through the first refrigerant inlet pipe in sequence to flow through the first heat exchange flow path, and flows back to the compressor after passing through the throttling device and the indoor heat exchanger.

2. An air conditioner, characterized in that: include: A refrigerant circuit in which the refrigerant circulates sequentially through the compressor, the outdoor heat exchanger, the throttling device, and the indoor heat exchanger; The outdoor heat exchanger comprises: A plurality of pipeline openings are arranged on the outdoor heat exchanger; A first heat exchange flow path, which is located at the bottom of the outdoor heat exchanger, has refrigerant flowing therein, and penetrates at least a portion of the pipeline opening; The first heat exchange flow path comprises: A first refrigerant inlet pipe, which is correspondingly connected to the pipeline opening near the bottom of the outdoor heat exchanger; A second refrigerant inlet pipe, which is correspondingly connected to the pipeline opening near the bottom of the outdoor heat exchanger; A first refrigerant outlet pipe, which is connected to the first refrigerant inlet pipe and the second refrigerant inlet pipe respectively; In the heating state, the refrigerant flows out of the compressor, passes through the indoor heat exchanger and the throttling device in sequence and flows to the first refrigerant outlet pipe, and then flows back to the compressor after being split through the first refrigerant inlet pipe and the second refrigerant inlet pipe.

3. The air conditioner according to claim 1 or 2, characterized in that: The outdoor heat exchanger also includes: The second heat exchange flow path is located at the top of the first heat exchange flow path, has refrigerant flowing therein, and penetrates at least a portion of the pipeline openings. The first heat exchange flow path and the second heat exchange flow path are arranged in parallel in the refrigerant circuit.

4. The air conditioner according to claim 2, characterized in that: The second refrigerant inlet pipe is correspondingly connected to the pipeline opening adjacent to the first refrigerant inlet pipe.

5. The air conditioner according to claim 2, characterized in that: The outdoor heat exchanger comprises: A heat exchanger end plate, which is arranged at two opposite ends of the outdoor heat exchanger, and a plurality of pipeline openings are arranged on the heat exchanger end plate; In the height direction of the heat exchanger, at least one horizontal row of the pipeline openings is provided on the end plate of the heat exchanger, and each horizontal row of the pipeline openings may include at least one pipeline opening.

6. The air conditioner according to claim 5, characterized in that: The first refrigerant inlet pipe is correspondingly connected to any pipeline opening in the lowest horizontal row of the outdoor heat exchanger.

7. The air conditioner according to claim 6, characterized in that: The second refrigerant inlet pipe is correspondingly connected to any pipe opening in the lowest horizontal row of the outdoor heat exchanger; or The second refrigerant inlet pipe is correspondingly connected to any pipeline opening on a horizontal row adjacent to the lowest horizontal row of the outdoor heat exchanger.

8. The air conditioner according to claim 5, characterized in that: The first refrigerant outlet pipe is correspondingly connected to any pipeline opening on the horizontal row above the first refrigerant inlet pipe and the second refrigerant inlet pipe.

9. The air conditioner according to claim 3, characterized in that: The number of the pipeline openings through which the first heat exchange flow path passes is greater than the number of the pipeline openings through which the second heat exchange flow path passes.

10. The air conditioner according to claim 3, characterized in that: The outdoor heat exchanger comprises: A bend portion is connected to the pipeline opening correspondingly, two pipeline openings are connected to one bend portion correspondingly, at least one bend portion is respectively provided in the first heat exchange flow path and the second heat exchange flow path, and the number of the bend portions in the first heat exchange flow path is greater than the number of the bend portions in the second heat exchange flow path.

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