Air conditioner indoor unit, air conditioner and refrigerant detection control method

Abstract

The invention discloses an air conditioner indoor unit, an air conditioner and a refrigerant detection control method. The air conditioner indoor unit comprises a shell provided with a backflow port; the heat exchanger comprises a body arranged in the shell and a heat exchange pipeline arranged on the body; the external pipeline is arranged outside the shell and is communicated with the heat exchange pipeline; the backflow assembly is connected with the shell and arranged outside the shell, the backflow assembly is provided with a containing cavity communicating with the backflow opening, and the communicating position of the external pipeline and the heat exchange pipeline is arranged in the containing cavity; and the refrigerant detection assembly is arranged in the shell and used for detecting the concentration of the refrigerant in the shell.

Description

Technical Field

[0001] The present application belongs to the field of electrical appliance technology, and specifically relates to an air conditioner indoor unit, an air conditioner and a refrigerant detection and control method. Background Art

[0002] GWP (global warming potential) is a value used to express and compare the impact of ozone-depleting substances on global warming. It is an index based on the radiation characteristics of well-mixed greenhouse gases, used to measure the radiative forcing of a given unit mass of well-mixed greenhouse gases in the current atmosphere accumulated over a selected period of time relative to the refrigerant. GWP is an index of the greenhouse effect of a substance.

[0003] In order to reduce the impact on the environment, air-conditioning products will use refrigerants with a GWP of less than 750. Currently, refrigerants R32 and R454B that meet the GWP of less than 750 are both flammable and explosive refrigerants. When flammable and explosive refrigerants leak, safety accidents are likely to occur, causing harm to users.

[0004] However, in the prior art, it is impossible to detect whether the flammable and explosive refrigerant has leaked. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an air-conditioning indoor unit, an air conditioner and a refrigerant detection and control method, aiming to at least solve the technical problem of being unable to detect whether a flammable and explosive refrigerant has leaked to a certain extent.

[0006] The technical solution of the present invention is:

[0007] An air-conditioning indoor unit is special in that it comprises: a shell having a return port; a heat exchanger comprising a main body arranged in the shell and a heat exchange pipe arranged on the main body; an external pipe arranged outside the shell and connected with the heat exchange pipe; a return assembly connected to the shell and arranged outside the shell, the return assembly having a accommodating cavity connected with the return port, and the connecting point between the external pipe and the heat exchange pipe is arranged in the accommodating cavity; a refrigerant detection assembly arranged in the shell and used for detecting the concentration of the refrigerant in the shell.

[0008] Since the shell is provided with a return port, the heat exchanger includes a main body arranged in the shell and a heat exchange pipe arranged on the main body, so the heat exchange pipe is supported by the main body, and since the external pipe is arranged outside the shell and communicated with the heat exchange pipe, the heat exchange pipe is communicated with the compressor to realize the circulation of the refrigerant in the heat exchange pipe. Since the return component is connected to the shell and is arranged outside the shell, the return component is provided with a accommodating cavity communicated with the return port, and the connecting point between the external pipe and the heat exchange pipe is arranged in the accommodating cavity. The refrigerant detection component is arranged in the shell for detecting the concentration of the refrigerant in the shell. Therefore, if the heat exchange pipe located in the shell leaks refrigerant, the refrigerant detection component in the shell can directly detect the concentration of the refrigerant in the shell, which can quickly detect the concentration of the refrigerant in the shell. Detecting refrigerant leakage and improving the sensitivity of detection. If refrigerant leakage occurs at the connection point between the external pipeline and the heat exchange pipeline, the leaked refrigerant will enter the containing cavity, and then flow back to the shell through the reflux port. The refrigerant detection component in the shell detects the concentration of the refrigerant entering the shell, which can quickly detect refrigerant leakage and improve the sensitivity of detection. At the same time, there is no need to set up a refrigerant detection component outside the shell to detect whether there is refrigerant leakage at the connection point between the external pipeline and the heat exchange pipeline. Only one refrigerant detection component can be used to detect whether the refrigerant at the connection point between the external pipeline and the heat exchange pipeline and / or the refrigerant in the heat exchange pipeline located in the shell is leaking, thereby achieving the effect of rapid detection and reducing costs.

[0009] In some embodiments, the reflux assembly includes: a first support member, disposed outside the shell; a sealing member, disposed on the first support member and forming the accommodating cavity together with the first support member, so that the refrigerant leaked at the connection point between the external pipeline and the heat exchange pipeline 202 can flow back into the shell through the reflux port.

[0010] In some embodiments, the seal includes: a first sealing portion, disposed in the first support member; a second sealing portion, disposed in the first support member, the second sealing portion is connected to the first sealing portion to form a channel connected to the accommodating cavity, the external pipe is passed through the channel and connected to the heat exchange pipe, so as to facilitate the connection between the external pipe and the heat exchange pipe, and at the same time, ensure sealing.

[0011] In some embodiments, the first sealing portion is provided with a first groove, and the second sealing portion is provided with a second groove. When the second sealing portion is docked with the first sealing portion, the first groove and the second groove form at least a portion of the channel to facilitate the connection between the external pipeline and the heat exchange pipeline, while ensuring sealing.

[0012] In some embodiments, the second sealing portion is detachably connected to the housing to facilitate assembly and disassembly of the second sealing portion.

[0013] In some embodiments, the channel includes a first sub-channel and a second sub-channel connected to the first sub-channel, the first sub-channel is arranged between the first sealing part and the second sealing part, and the second sub-channel protrudes outside the accommodating cavity to further ensure the sealing effect.

[0014] In some embodiments, the seal also includes: a third sealing portion, which is provided at the end of the first sealing portion away from the shell and extends in a direction away from the shell; a fourth sealing portion, which is provided at the end of the second sealing portion away from the shell and extends in a direction away from the shell, and the second sealing portion is docked with the first sealing portion to form the second sub-channel to further ensure the sealing effect.

[0015] In some embodiments, the refrigerant detection assembly includes: a second support member disposed in the shell; and a refrigerant detection member disposed on the second support member to facilitate installation of the refrigerant detection assembly.

[0016] In some embodiments, the air conditioner indoor unit further includes: a water receiving pan, which is disposed in the shell and below the heat exchanger, and the refrigerant detection component is disposed on the water receiving pan to ensure the detection accuracy of the refrigerant detection component.

[0017] In some embodiments, the shell includes a chassis, and the refrigerant detection component is arranged on the chassis to ensure the detection accuracy of the refrigerant detection component.

[0018] In some embodiments, the refrigerant detection component is spaced consistently from both sides of the heat exchanger to ensure detection accuracy of the refrigerant detection component.

[0019] Based on the same inventive concept, the present invention also provides an air conditioner, including the air conditioner indoor unit.

[0020] Based on the same inventive concept, the present invention also provides a refrigerant detection control method, which is applied to the air conditioner, and is characterized in that the air conditioner also includes a controller electrically connected to the refrigerant detection component, and the refrigerant detection control method includes: the controller obtains the refrigerant concentration value in the shell detected by the refrigerant detection component; if the refrigerant concentration value is greater than a preset refrigerant concentration value, the controller controls the air conditioner to cut off power. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the structure of an air-conditioning indoor unit according to some embodiments;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure of the indoor unit of the air conditioner after the external pipes are removed;

[0024] Figure 3 for Figure 2 A top view of the indoor unit of the air conditioner;

[0025] Figure 4 for Figure 1 Side view of the indoor unit of the air conditioner;

[0026] Figure 5 for Figure 4 The enlarged schematic diagram of point A in the middle;

[0027] Figure 6 for Figure 2 A schematic diagram of the structure of the indoor unit of the medium air conditioner after the second sealing part is removed;

[0028] Figure 7 for Figure 6 The enlarged schematic diagram of point B in the middle;

[0029] Figure 8 for Figure 2 Schematic diagram of the arrangement of the heat exchanger of the indoor unit of the air conditioner;

[0030] Fig. 9 Schematic diagram of the flow of refrigerant detection and control methods in some embodiments.

[0031] In the attached figure:

[0032] Shell 10, return port 101, bottom plate 102;

[0033] Heat exchanger 20, body 201, heat exchange pipe 202;

[0034] An external pipe 30, a first external pipe 301, and a second external pipe 302;

[0035] Reflux assembly 40, first support member 401, sealing member 402, first sealing portion 4021, second sealing portion 4022, channel 4023, first sub-channel 40231, second sub-channel 40232, third sealing portion 4024, fourth sealing portion 4025, first connecting portion 4026, second connecting portion 4027, and lug 4028;

[0036] Refrigerant detection component 50, second support member 501, refrigerant detection member 502;

[0037] Connector 60, first connector 601, second connector 602. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, 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.

[0041] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] In order to detect whether the flammable and explosive refrigerant has leaked, a refrigerant detection device is installed in the shell of the air conditioner. The refrigerant concentration in the shell is detected by the refrigerant detection device to determine whether the refrigerant has leaked. However, the refrigerant leakage points of the air conditioner are located inside and outside the shell respectively. If the refrigerant inside and outside the shell is to be detected, multiple refrigerant detection devices are required, resulting in high costs.

[0043] The air-conditioning indoor unit and the air-conditioner provided in the embodiments of the present application can improve the above-mentioned problems. The air-conditioning indoor unit and the air-conditioner provided in the embodiments of the present application are intended to at least solve the technical problem of being unable to detect whether the flammable and explosive refrigerant has leaked to a certain extent.

[0044] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0045] Figure 1 A schematic diagram of the structure of an air-conditioning indoor unit according to some embodiments; Figure 2 for Figure 1 Schematic diagram of the structure of the indoor unit of the air conditioner after the external pipes are removed; Figure 3 for Figure 2 A top view of the indoor unit of the air conditioner; Figure 6 for Figure 2 A schematic diagram of the structure of the indoor unit of the medium air conditioner after the second sealing part is removed; Figure 8 for Figure 2 Schematic diagram of the layout of the heat exchanger of the indoor unit of the air conditioner. Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 8 The indoor unit of the air conditioner of the embodiment of the present application includes: a shell 10, a heat exchanger 20, an external pipe 30, a reflux component 40 and a refrigerant detection component 50. The shell 10 is provided with a reflux port 101. The heat exchanger 20 includes a main body 201 arranged in the shell 10 and a heat exchange pipe 202 arranged on the main body 201. The external pipe 30 is arranged outside the shell 10 and communicated with the heat exchange pipe 202. The reflux component 40 is connected to the shell 10 and arranged outside the shell 10. The reflux component 40 is provided with a accommodating chamber communicated with the reflux port 101, and the connection point between the external pipe 30 and the heat exchange pipe 202 is arranged in the accommodating chamber. The refrigerant detection component 50 is arranged in the shell 10, and is used to detect the concentration of the refrigerant in the shell 10.

[0046] The heat exchanger 20 may be an evaporator.

[0047] Since the shell 10 is provided with a return port 101, the heat exchanger 20 includes a main body 201 arranged in the shell 10 and a heat exchange pipe 202 arranged on the main body 201, so the heat exchange pipe 202 is supported by the main body 201, and since the external pipe 30 is arranged outside the shell 10 and communicated with the heat exchange pipe 202, the heat exchange pipe 202 is communicated with the compressor to realize the circulation of the refrigerant in the heat exchange pipe 202. Since the return component 40 is connected to the shell 10 and is arranged outside the shell 10, the return component 40 is provided with a accommodating cavity communicated with the return port 101, and the connection point between the external pipe 30 and the heat exchange pipe 202 is arranged in the accommodating cavity. The refrigerant detection component 50 is arranged in the shell 10 for detecting the concentration of the refrigerant in the shell 10. Therefore, if the heat exchange pipe 202 located in the shell 10 has a refrigerant leakage, the refrigerant detection component 50 in the shell 10 can directly detect By measuring the concentration of the refrigerant in the shell 10, the leaked refrigerant can be quickly detected, thereby improving the sensitivity of detection. If a refrigerant leak occurs at the connection between the external pipe 30 and the heat exchange pipe 202, the leaked refrigerant will enter the accommodating cavity, and then the leaked refrigerant will flow back to the shell 10 through the reflux port 101. The refrigerant detection component 50 in the shell 10 detects the concentration of the refrigerant entering the shell 10, thereby quickly detecting the leaked refrigerant, thereby improving the sensitivity of detection. At the same time, there is no need to set up a refrigerant detection component 50 outside the shell 10 to detect whether a refrigerant leak occurs at the connection between the external pipe 30 and the heat exchange pipe 202. Only one refrigerant detection component 50 can be used to detect whether the refrigerant at the connection between the external pipe 30 and the heat exchange pipe 202 and / or the refrigerant in the heat exchange pipe 202 located in the shell 10 is leaking, thereby achieving a rapid detection effect and reducing costs.

[0048] Combination Figure 1 In some embodiments, the heat exchange pipe 202 has an inlet and an outlet, and the number of the external pipes 202 can be two, that is, the external pipe 202 includes: a first external pipe 301 and a second external pipe 302. One end of the first external pipe 301 is connected to the inlet of the heat exchange pipe 202, and the other end is connected to the compressor, and one end of the second external pipe 302 is connected to the outlet of the heat exchange pipe 202, and the other end is connected to the compressor, so as to realize the circulation of the refrigerant in the heat exchange pipe 202.

[0049] Figure 7 for Figure 6 A magnified schematic diagram of B in the middle. Figure 6 and Figure 7In some embodiments, in order to facilitate the communication between the heat exchange pipe 202 and the external pipe 202, the air conditioner indoor unit further includes: a joint 60. The joint 60 is arranged outside the shell 10 and arranged in the accommodating cavity. One end of the joint 60 is penetrated through the shell 10 and communicated with the heat exchange pipe 202, and the other end is communicated with the external pipe 202, so as to realize the communication between the heat exchange pipe 202 and the external pipe 202.

[0050] Combination Figure 6 and Figure 7 In some embodiments, the number of the joints 60 may be two, and the two joints 60 include: a first joint 601 and a second joint 602. One end of the first joint 601 is arranged through the shell 10 and communicated with the inlet of the heat exchange pipe 202, and the other end is communicated with the first external pipe 301 to achieve communication between the inlet of the heat exchange pipe 202 and the first external pipe 301. One end of the second joint 602 is arranged through the shell 10 and communicated with the outlet of the heat exchange pipe 202, and the other end is communicated with the second external pipe 302 to achieve communication between the outlet of the heat exchange pipe 202 and the second external pipe 302.

[0051] Figure 4 for Figure 1 Side view of the indoor unit of the air conditioner; Figure 5 for Figure 4 A magnified schematic diagram of the middle A. Figure 4 , Figure 5 , Figure 6 and Figure 7 In some embodiments, in order to allow the refrigerant leaking from the connection point between the external pipe 30 and the heat exchange pipe 202 to flow back into the shell 10 through the reflux port 101, the reflux assembly 40 includes: a first support member 401 and a seal member 402. The first support member 401 is disposed outside the shell 10, and the first support member 401 is supported by the outer wall of the shell 10, so that the shell 10 can carry the first support member 401 and the seal member 402. The seal member 402 is disposed on the first support member 401, and the seal member 402 is supported by the first support member 401, and the seal member 402 and the first support member 401 form a receiving cavity.

[0052] In some embodiments, if a refrigerant leak occurs at the connection between the external pipe 30 and the heat exchange pipe 202, the leaked refrigerant will enter the accommodating cavity formed by the seal 402 and the first support member 401. The seal 402 and the first support member 401 cooperate to achieve sealing to prevent the leaked refrigerant from flowing outside the shell. The accommodating cavity is connected to the reflux port 101, so that the leaked refrigerant flows back into the shell 10 through the reflux port 101. The refrigerant detection component 50 in the shell 10 detects the concentration of the refrigerant entering the shell 10, so as to quickly detect the leaked refrigerant and improve the detection sensitivity.

[0053] In some embodiments, since the external pipe 30 is connected to the heat exchange pipe 202, there is refrigerant in both the external pipe 30 and the heat exchange pipe 202. During the heat exchange process of the refrigerant, condensation water will be generated at the connection between the external pipe 30 and the heat exchange pipe 202. In order to avoid leakage of condensation water, the first support member 401 can be a water receiving cover, which receives condensation water dripping from the connection between the external pipe 30 and the heat exchange pipe 202 through the water receiving cover to avoid leakage of condensation water and ensure the user's experience.

[0054] Combination Figure 4 , Figure 5 , Figure 6 and Figure 7 In some embodiments, in order to facilitate the communication between the external pipe 30 and the heat exchange pipe 202, the sealing member 402 includes: a first sealing portion 4021 and a second sealing portion 4022. The first sealing portion 4021 is disposed in the first support member 401, and the first sealing portion 4021 is supported by the first support member 401. The second sealing portion 4022 is disposed in the first support member 401, and the second sealing portion 4022 is supported by the second support member 401. The second sealing portion 4022 is docked with the first sealing portion 4021 to form a channel 4023 communicating with the accommodating cavity, and the external pipe 30 is passed through the channel 4023 to communicate with the heat exchange pipe 202.

[0055] In some embodiments, the external pipe 30 is passed through the channel 4023 to enter the accommodating cavity, and is connected with the heat exchange pipe 202 in the accommodating cavity, so as to facilitate the assembly of the external pipe 30. At the same time, the inner wall of the channel 4023 will fit with the outer pipe wall of the external pipe 30 to achieve sealing, thereby preventing the refrigerant leaking from the connection point between the external pipe 30 and the heat exchange pipe 202 from flowing outside the shell 10, and ensuring that the refrigerant leaking from the connection point between the external pipe 30 and the heat exchange pipe 202 flows back into the shell 10 through the reflux port 101, so that the refrigerant detection component 50 in the shell 10 can detect the concentration of the refrigerant entering the shell 10.

[0056] In some embodiments, the second sealing portion 4022 is docked with the first sealing portion 4021 to facilitate the assembly of the seal 402 and also achieve sealing, thereby preventing the refrigerant leaking from the connection between the external pipe 30 and the heat exchange pipe 202 from flowing outside the shell 10, and ensuring that the refrigerant leaking from the connection between the external pipe 30 and the heat exchange pipe 202 flows back into the shell 10 through the reflux port 101, so that the refrigerant detection assembly 50 in the shell 10 can detect the concentration of the refrigerant entering the shell 10.

[0057] In some embodiments, the first support member 401 has a first opening, a second opening, and a third opening. That is, the cross-sectional shape of the first support member 401 can be U-shaped, the first opening is connected to the reflux port 101, the second opening is opposite to the first opening, and the third opening is opened at the top of the first support member 401 and is connected to the first opening and the second opening. When the first sealing portion 4021 is to be installed, the first sealing portion 4021 enters the second opening from the third opening, and there is a gap between the first sealing portion 4021 and the outer wall of the housing 10. The second sealing portion 4022 enters the second opening from the third opening and docks with the first sealing portion 4021. Through the second sealing portion 402 2 and the first sealing portion 4021 seal the second opening, and another portion of the second sealing portion 4022 is covered on the third opening to seal the third opening. There is a distance between the portion of the second sealing portion 4022 covering the third opening and the bottom of the first support member 401, that is, a receiving cavity is formed by the inner wall of the first support member 401, the first sealing portion 4021 and the second sealing portion 4022, thereby ensuring the sealing of the receiving cavity, preventing the refrigerant leaking from the connection point between the external pipe 30 and the heat exchange pipe 202 from flowing out of the shell 10, and ensuring that the refrigerant leaking from the connection point between the external pipe 30 and the heat exchange pipe 202 leaks back into the shell 10 through the reflux port 101.

[0058] In some embodiments, in order to facilitate the assembly of the first sealing part 4021 and the second sealing part 4022, a first embedding groove is opened in the first support member 401, and the first sealing part 4021 can be embedded in the first embedding groove to achieve the installation of the first sealing part 4021, and a second embedding groove is opened in the second support member 402, and the second sealing part 4022 can be embedded in the second embedding groove to achieve the installation of the second sealing part 4022.

[0059] Combination Figure 4 , Figure 5 , Figure 6 and Figure 7 In some embodiments, in order to facilitate the docking of the first sealing part 4021 and the second sealing part 4022, the first sealing part 4021 and the second sealing part 4022 may also extend in a direction away from the housing 10, and the first sealing part 4021 partially protrudes from the first support member 401 to form a first connecting part 4026, and the second sealing part 4022 partially protrudes from the first support member 401 to form a second connecting part 4027. It can be understood that the first connecting part 4026 and the second connecting part 4027 are both arranged outside the first support member 401, and the first connecting part 4026 and the second connecting part 4027 are clamped by a clamping member, so as to ensure the sealing effect and the connection stability of the first sealing part 4021 and the second sealing part 4022. The clamping member may be a throat clamp.

[0060] In some embodiments, when it is necessary to inspect the connection between the external pipe 30 and the heat exchange pipe 202, the clamping member can be removed, and then the first connection part 4026 and the second connection part 4027 can be separated, and the second sealing part 4022 can be removed from the first support member 401, so that the connection between the external pipe 30 and the heat exchange pipe 202 is exposed, and the staff can directly inspect and repair it without disassembling the first sealing part 4021, thereby improving work efficiency. When the connection between the external pipe 30 and the heat exchange pipe 202 is inspected and repaired, the second sealing part 4022 is docked with the first sealing part 4021, and the clamping member is raised to clamp the first connection part 4026 and the second connection part 4027, so that the second sealing part 4022 can be installed, thereby improving installation efficiency.

[0061] Of course, in some other embodiments, in order to facilitate the docking of the first sealing part 4021 and the second sealing part 4022, a sealant can be provided between the first sealing part 4021 and the second sealing part 4022, so as to ensure the sealing effect while also ensuring the connection stability between the first sealing part 4021 and the second sealing part 4022.

[0062] In some embodiments, in order to facilitate the disassembly and assembly of the second sealing portion 4022, the second sealing portion 4022 is detachably connected to the shell 10, that is, when the second sealing portion 4022 is docked with the first sealing portion 4021, the second sealing portion 4022 is installed on the shell 10, and the support is provided by the shell 10 to ensure the stability of the installation of the second sealing portion 4022. At the same time, the second sealing portion 4022 is in contact with the outer wall of the shell 10 to achieve sealing, thereby preventing the refrigerant leaking from the connection between the external pipe 30 and the heat exchange pipe 202 from flowing outside the shell 10, and further ensuring that the refrigerant leaking from the connection between the external pipe 30 and the heat exchange pipe 202 leaks back into the shell 10 through the reflux port 101, so that the refrigerant detection assembly 50 in the shell 10 can detect the concentration of the refrigerant entering the shell 10. When it is necessary to inspect the connection between the external pipe 30 and the heat exchange pipe 202 , the second sealing portion 4022 can be removed from the shell 10 to facilitate separation of the second sealing portion 4022 from the first sealing portion 4011 .

[0063] Combination Figure 4 and Figure 5In some embodiments, in order to facilitate the disassembly and assembly of the second sealing part 4022 on the housing 10, the sealing member 402 further includes: two ears 4028. The two ears 4028 are respectively arranged at the two ends of the second sealing part 4022, and the two ears 4028 are arranged outside the first support member 401. Through holes are opened on the two ears 4028, and the connecting member is penetrated through the through hole and connected with the housing 10 to realize the installation of the second sealing part 4022 on the housing 10. When the second sealing part 4022 needs to be disassembled from the housing 10, the connecting member is separated from the housing 10, and the second sealing part 4022 can be disassembled from the housing 10, so as to facilitate the disassembly and assembly of the second sealing part 4022 on the housing 10. Among them, the connecting member can be a bolt.

[0064] In some embodiments, in order to ensure the stability of the connection between the second sealing portion 4022 and the two supporting ears 4028 , the second sealing portion 4022 can be integrally formed with the two supporting ears 4028 .

[0065] In some embodiments, in order to facilitate the connection between the external pipe 30 and the heat exchange pipe 202, the first sealing part 4021 is provided with a first groove, and the second sealing part 4022 is provided with a second groove. When the second sealing part 4022 is docked with the first sealing part 4021, the first groove and the second groove form at least a part of the channel 4023.

[0066] In some embodiments, the external pipe 30 is passed through the first groove and the second groove to enter the accommodating cavity, and is connected with the heat exchange pipe 202 in the accommodating cavity, so as to facilitate the assembly of the external pipe 30. At the same time, the groove wall of the first groove and the groove wall of the second groove will fit with the outer tube wall of the external pipe 30 to achieve sealing, thereby preventing the refrigerant leaking from the connection point between the external pipe 30 and the heat exchange pipe 202 from flowing outside the shell 10, and ensuring that the refrigerant leaking from the connection point between the external pipe 30 and the heat exchange pipe 202 flows back into the shell 10 through the reflux port 101, so that the refrigerant detection component 50 in the shell 10 can detect the concentration of the refrigerant entering the shell 10.

[0067] Combination Figure 4 , Figure 5 , Figure 6 and Figure 7 In some embodiments, in order to further ensure the sealing effect, the channel 4023 includes a first sub-channel 40231 and a second sub-channel 40232 connected to the first sub-channel 40231, the first sub-channel 40231 is arranged between the first sealing part 4021 and the second sealing part 4022, and the second sub-channel 40232 protrudes outside the accommodating cavity.

[0068] In some embodiments, the external pipe 30 is sequentially passed through the second sub-channel 40232 and the first sub-channel 40231 to enter the accommodating cavity, and the inner wall of the first sub-channel 40231 and the inner wall of the second sub-channel 40232 will fit with the outer tube wall of the external pipe 30, not only achieving sealing between the first sealing portion 4021 and the second sealing portion 4022, but also achieving sealing outside the first support member 401, further ensuring the sealing effect, preventing the refrigerant leaking from the connection between the external pipe 30 and the heat exchange pipe 202 from flowing outside the shell 10, and ensuring that the refrigerant leaking from the connection between the external pipe 30 and the heat exchange pipe 202 leaks back into the shell 10 through the reflux port 101, so that the refrigerant detection component 50 in the shell 10 can detect the concentration of the refrigerant entering the shell 10.

[0069] Combination Figure 4 , Figure 5 , Figure 6 and Figure 7 In some embodiments, in order to further ensure the sealing effect, the sealing member 402 further includes: a third sealing portion 4024 and a fourth sealing portion 4025. The third sealing portion 4024 is disposed at the end of the first sealing portion 4021 away from the housing 10, and extends in a direction away from the housing 10. The fourth sealing portion 4025 is disposed at the end of the second sealing portion 4022 away from the housing 10, and extends in a direction away from the housing 10. The second sealing portion 4022 is butted against the first sealing portion 4021 to form a second sub-channel 40232.

[0070] In some embodiments, the portion of the external pipe 30 located outside the first support member 401 is arranged between the third sealing portion 4024 and the fourth sealing portion 4025, that is, the portion of the external pipe 30 located outside the first support member 401 is fitted by the third sealing portion 4024 and the fourth sealing portion 4025 to achieve sealing, further ensuring the sealing effect, preventing the refrigerant leaking from the connection between the external pipe 30 and the heat exchange pipe 202 from flowing outside the shell 10, and ensuring that the refrigerant leaking from the connection between the external pipe 30 and the heat exchange pipe 202 leaks back into the shell 10 through the reflux port 101, so that the refrigerant detection component 50 in the shell 10 can detect the concentration of the refrigerant entering the shell 10.

[0071] Combination Figure 1 , Figure 2 and Figure 3 In some embodiments, in order to facilitate the installation of the refrigerant detection assembly 50, the refrigerant detection assembly 50 includes: a second support member 501 and a refrigerant detection member 502. The second support member 501 is disposed in the housing 10, and the second support member 501 is supported by the housing 10. The refrigerant detection member 502 is disposed on the second support member 501, and the refrigerant detection member 502 is supported by the second support member 501.

[0072] Since the density of the refrigerant is greater than that of the air, if a refrigerant leak occurs, the refrigerant will fall to the lowest point of the shell 10 under the action of gravity. In some embodiments, in order to ensure the detection accuracy of the refrigerant detection component 50, the air conditioner indoor unit also includes: a water receiving pan. The water receiving pan is arranged in the shell 10 and is located below the heat exchanger 20. The refrigerant detection component 50 is arranged on the water receiving pan. In order to receive the condensed water generated by the heat exchanger 20, the water receiving pan is generally placed at the bottom of the shell 10. The refrigerant detection component 50 is placed on the water receiving pan, that is, the refrigerant detection component 50 is located at the bottom of the shell 10. When a refrigerant leak occurs, the refrigerant will fall to the water receiving pan under the action of gravity. The refrigerant detection component 50 can detect the concentration of the refrigerant to ensure the detection accuracy of the refrigerant detection component 50.

[0073] In some embodiments, a mounting position for the refrigerant detection assembly 50 is provided on the water receiving tray, and the refrigerant detection assembly 50 can be directly installed in the mounting position without adding new components. In other words, the refrigerant detection member 502 of the refrigerant detection assembly 50 can be directly installed in the mounting position without the need for a second support member 501 and without adding new components, which reduces costs and facilitates assembly.

[0074] In some embodiments, the installation position of the refrigerant detection assembly 50 is located at the highest point of the water receiving tray to prevent condensed water on the water receiving tray from soaking the refrigerant detection component 502 of the refrigerant detection assembly 50 to ensure the safety of the refrigerant detection component 502.

[0075] Since the density of the refrigerant is greater than that of the air, if there is a refrigerant leak, the refrigerant will fall to the lowest point of the housing 10 under the action of gravity. Figure 1 , Figure 2 and Figure 3 In some embodiments, in order to ensure the detection accuracy of the refrigerant detection component 50, the housing 10 includes: a chassis 102. The refrigerant detection component 50 is arranged on the chassis 102, and the chassis 102 is placed at the lower part of the housing 10, that is, the refrigerant detection component 50 is located at the lower part of the housing 10. When a refrigerant leak occurs, the refrigerant will fall onto the chassis 102 under the action of gravity, and the refrigerant detection component 50 can detect the concentration of the refrigerant to ensure the detection accuracy of the refrigerant detection component 50.

[0076] Of course, in some other embodiments, the refrigerant detection assembly 50 can also be installed on the side plate of the housing 10, the top plate of the housing 10, or the body 201 of the heat exchanger 20. However, when the heat exchanger 20 is working, condensed water will be generated on the body 201. In order to ensure the safety of the refrigerant detection assembly 50, when the refrigerant detection assembly 50 is installed on the body 201 of the heat exchanger 20, the refrigerant detection assembly 50 needs to be waterproofed to ensure the safety of the refrigerant detection assembly 50.

[0077] The refrigerant leakage point is generally located at the place where the bending radius of the heat exchange pipe 202 is too small. The place where the bending radius of the heat exchange pipe 202 is too small is located on both sides of the main body 201. In some embodiments, in order to ensure the detection accuracy of the refrigerant detection component 50, the refrigerant detection component 50 is consistent with the spacing on both sides of the heat exchanger 20. That is to say, the refrigerant detection component 50 is consistent with the spacing at the place where the bending radius of the heat exchange pipe 202 on both sides of the main body 201 is too small. When the refrigerant leaks at the place where the bending radius of the heat exchange pipe 202 is too small, the distance from the refrigerant on both sides of the heat exchanger 20 to the refrigerant detection component 50 is consistent. The refrigerant detection component 50 can detect the concentration of the refrigerant on both sides of the heat exchanger 20 to ensure the detection accuracy of the refrigerant detection component 50. At the same time, there is no need to set two refrigerant detection components 50 on both sides of the shell 10 for detection. Only one refrigerant detection component 50 can detect whether the refrigerant on both sides of the heat exchanger 20 is leaking, thereby achieving the effect of rapid detection and reducing costs.

[0078] In some embodiments, when a refrigerant leak occurs at the connection point between the external pipe 30 and the heat exchange pipe 202, the leaked refrigerant will enter the shell 10 through the accommodating cavity and the return port 101 in turn. Since the distance between the refrigerant detection component 50 and the two sides of the heat exchanger 20 is consistent, that is, when the return port 101 is located on either side of the heat exchanger 20, the distance between the return port 101 and the refrigerant detection component 50 will not change, so as to ensure the detection accuracy of the refrigerant detection component 50.

[0079] In some embodiments, when the refrigerant detection assembly 50 is installed on the water receiving tray, if the two sides of the heat exchanger 20 are located on the two sides in the width direction of the water receiving tray, the refrigerant detection assembly 50 is arranged in the middle of the water receiving tray along the width direction of the water receiving tray, that is, the refrigerant detection assembly 50 is consistent with the spacing between the two sides in the width direction of the water receiving tray to ensure the detection accuracy of the refrigerant detection assembly 50. Of course, in some other embodiments, if the two sides of the heat exchanger 20 are located on the two sides in the length direction of the water receiving tray, the refrigerant detection assembly 50 is arranged in the middle of the water receiving tray along the length direction of the water receiving tray, that is, the refrigerant detection assembly 50 is consistent with the spacing between the two sides in the length direction of the water receiving tray to ensure the detection accuracy of the refrigerant detection assembly 50.

[0080] Based on the same inventive concept, the present application also proposes an air conditioner, which adopts the air-conditioning indoor unit. The specific structure of the air-conditioning indoor unit refers to the above-mentioned embodiment. Since all the technical solutions of all the above-mentioned embodiments are adopted, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0081] Fig. 9 FIG. 1 is a flow chart of a refrigerant detection control method according to some embodiments. Fig. 9Based on the same inventive concept, the present application also provides a refrigerant detection control method, which is applied to an air conditioner. The air conditioner also includes a controller electrically connected to the refrigerant detection component 50. The refrigerant detection control method includes:

[0082] In step S11 , the controller obtains the refrigerant concentration value in the housing 10 detected by the refrigerant detection assembly 50 .

[0083] Specifically, after the air conditioner is powered on, the controller is in a standby state. The refrigerant detection component 50 detects the refrigerant concentration value in the housing 10 and sends the detected refrigerant concentration value in the housing 10 to the controller.

[0084] In step S12, if the refrigerant concentration value is greater than a preset refrigerant concentration value, the controller controls the air conditioner to be powered off.

[0085] Specifically, the controller compares the refrigerant concentration value in the shell 10 detected by the refrigerant detection component 50 with the preset refrigerant concentration value. If the refrigerant concentration value is greater than the preset refrigerant concentration value, the controller controls the air conditioner to cut off the power so that there is no current in the air conditioner, thereby preventing the flammable and explosive refrigerant from being ignited and detonated by the current, thereby ensuring safety.

[0086] In some embodiments, after the controller controls the air conditioner to be powered off, the staff uses the refrigerant detection instrument to detect whether the refrigerant is really leaking or the refrigerant detection component 50 reports an error. If the refrigerant is really leaking, the heat exchanger 20 is repaired. If the refrigerant detection component 50 reports an error, the refrigerant detection component 50 is repaired. After the heat exchanger 20 or the refrigerant detection component 50 is repaired, the controller controls the air conditioner to be powered on so that the refrigerant detection component 50 performs the detection.

[0087] In the description of the present application, 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" 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 application 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 application.

[0088] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0089] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described 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 different embodiments or examples described in this specification.

[0091] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0092] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An air conditioner indoor unit, characterized in that: include: The shell is provided with a reflux port; The heat exchanger comprises a body arranged in the shell and a heat exchange pipe arranged on the body; An external pipeline is arranged outside the shell and communicated with the heat exchange pipeline; A reflux component is connected to the shell and is arranged outside the shell. The reflux component is provided with a receiving cavity connected to the reflux port. The connecting point between the external pipe and the heat exchange pipe is arranged in the receiving cavity. The refrigerant detection component is arranged in the shell and is used to detect the concentration of the refrigerant in the shell.

2. The air conditioner indoor unit according to claim 1, characterized in that: The reflux assembly comprises: A first support member, disposed outside the housing; A sealing member is disposed on the first supporting member and forms the accommodating cavity together with the first supporting member.

3. The air conditioner indoor unit according to claim 2, characterized in that: The sealing element comprises: A first sealing portion, disposed in the first supporting member; The second sealing part is arranged in the first supporting member, and the second sealing part is connected with the first sealing part to form a channel communicating with the accommodating cavity. The external pipe is passed through the channel and communicates with the heat exchange pipe.

4. The air conditioner indoor unit according to claim 3, characterized in that: The first sealing portion is provided with a first groove, and the second sealing portion is provided with a second groove. When the second sealing portion is butted against the first sealing portion, the first groove and the second groove form at least a portion of the channel.

5. The air conditioner indoor unit according to claim 3, characterized in that: The second sealing portion is detachably connected to the housing.

6. The air conditioner indoor unit according to claim 3, characterized in that: The channel includes a first sub-channel and a second sub-channel communicating with the first sub-channel, the first sub-channel is arranged between the first sealing portion and the second sealing portion, and the second sub-channel protrudes outside the accommodating cavity.

7. The air conditioner indoor unit according to claim 6, characterized in that: The seal also includes: A third sealing portion, provided at an end of the first sealing portion away from the housing and extending in a direction away from the housing; The fourth sealing portion is arranged at the end of the second sealing portion away from the shell and extends in a direction away from the shell. The second sealing portion is butted against the first sealing portion to form the second sub-channel.

8. The air conditioner indoor unit according to any one of claims 1 to 7, characterized in that: The refrigerant detection component comprises: A second support member is disposed in the housing; The refrigerant detection component is arranged on the second supporting component.

9. The air conditioner indoor unit according to any one of claims 1 to 7, characterized in that: The air conditioner indoor unit also includes: A water receiving tray is arranged in the shell and below the heat exchanger, and the refrigerant detection component is arranged on the water receiving tray.

10. The air conditioner indoor unit according to claims 1-7, characterized in that: The shell includes a chassis, and the refrigerant detection component is arranged on the chassis.

11. The air conditioner indoor unit according to claim 1-7, characterized in that: The refrigerant detection component is spaced in a consistent manner from both sides of the heat exchanger.

12. An air conditioner, characterized in that: It comprises an air-conditioning indoor unit as described in any one of claims 1-10.

13. A refrigerant detection and control method, applied to the air conditioner according to claim 12, characterized in that: The air conditioner further comprises a controller electrically connected to the refrigerant detection component, and the refrigerant detection control method comprises: The controller obtains the refrigerant concentration value in the shell detected by the refrigerant detection component; If the refrigerant concentration value is greater than a preset refrigerant concentration value, the controller controls the air conditioner to be powered off.

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