Air conditioner

Abstract

An air conditioner relates to the field of household appliances, is used for solving the problem that an electric control board of an outdoor unit is poor in heat dissipation effect, and comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, the electric control board and a heat dissipation assembly. One end of the outdoor heat exchanger communicates with the compressor; one end of the indoor heat exchanger communicates with the outdoor heat exchanger, and the other end communicates with the compressor; the electric control board is arranged in the outdoor heat exchanger; the heat dissipation assembly is arranged at the position of the electric control board, the heat dissipation assembly is in heat conduction with the electric control board, the heat dissipation assembly is used for cooling the electric control board, and the heat dissipation assembly communicates with the indoor heat exchanger and the compressor.

Description

Technical Field

[0001] This application relates to the technical field of household appliances, and particularly to an air conditioner. Background Art

[0002] At present, most of the heat dissipation methods for the heat generation module of the outdoor electronic control board of variable-frequency air conditioners on the market are natural wind heat dissipation and refrigerant heat dissipation. Natural wind heat dissipation is greatly affected by the ambient temperature, and the heat dissipation effect is not good; the refrigerant for refrigerant heat dissipation is the refrigerant with a relatively high temperature after heat exchange between the outdoor heat exchanger and the indoor heat exchanger, which cools the heat generation module. This method has limited cooling effect on the heat generation module, and the effect is not so good. Especially in a high-temperature environment, the temperature of the refrigerant after the outdoor heat exchanger and the indoor heat exchanger is nearly 50 degrees or more, and the cooling effect on the module is even worse.

[0003] However, both of these heat dissipation forms are limited in a high-temperature environment. In order to make the air conditioner operate normally, frequency reduction or frequency limitation is often used to meet the use of the air conditioner, which makes the use effect of the air conditioner worse and the cooling capacity smaller. Using frequency reduction or frequency limitation operation causes serious attenuation of the refrigerating capacity and affects the use effect of the air conditioner; moreover, in a high-temperature or ultra-high-temperature environment, the heat dissipation effect is poor and the air conditioner cannot be used at full load.

[0004] Therefore, the poor heat dissipation effect of the outdoor electronic control board is a problem that needs to be solved. Utility Model Content

[0005] This application provides an air conditioner for solving the problem of poor heat dissipation effect of the outdoor electronic control board.

[0006] This application provides an air conditioner, including: a compressor, an outdoor heat exchanger, an indoor heat exchanger, an electronic control board, and a heat dissipation component; one end of the outdoor heat exchanger is communicated with the compressor; one end of the indoor heat exchanger is communicated with the outdoor heat exchanger, and the other end of the indoor heat exchanger is communicated with the compressor; the electronic control board is arranged in the outdoor heat exchanger; the heat dissipation component is arranged at the electronic control board, the heat dissipation component is in thermal conduction with the electronic control board, the heat dissipation component is used for cooling the electronic control board, and the heat dissipation component is respectively communicated with the indoor heat exchanger and the compressor.

[0007] In this way, the electronic control board will continuously generate heat during the operation of the air conditioner, thereby affecting the normal operation of the air conditioner. When the air conditioner is in the cooling mode, the high-temperature and high-pressure refrigerant provided by the compressor flows to the outdoor heat exchanger, and the outdoor heat exchanger condenses the high-temperature and high-pressure refrigerant into a low-temperature liquid refrigerant. Then the refrigerant flows to the indoor heat exchanger, and the indoor heat exchanger evaporates the low-temperature refrigerant, thereby absorbing the surrounding heat and reducing the indoor temperature. The refrigerant then heats up and then flows to the heat dissipation component.

[0008] However, there is still residual cold in the refrigerant after evaporation by the indoor heat exchanger, that is, the temperature of the refrigerant is still lower than the room temperature or the temperature of the power control board. By thermally connecting the heat dissipation component to the power control board, the refrigerant in the heat dissipation component can absorb the temperature of the power control board, avoiding the abnormal operation of the air conditioner due to the over-high temperature of the power control board. When the power control board is in a high-temperature or ultra-high-temperature environment, it can still work normally without often adopting the form of frequency reduction or frequency limitation to meet the use of the air conditioner, which makes the use effect of the air conditioner poor, the cooling capacity small, and causes serious attenuation of the refrigeration capacity, affecting the use effect of the air conditioner.

[0009] In some embodiments of the present application, the air conditioner further includes a heating path, both ends of the heating path are respectively connected to the indoor heat exchanger and the compressor, and a first check valve is arranged on the heating path, and the first check valve is used to make the refrigerant flow from the compressor to the indoor heat exchanger.

[0010] In this way, the air conditioner is provided with a heating path, and both ends of the heating path are respectively connected to the indoor heat exchanger and the compressor. When the air conditioner is in the heating mode, the first check valve can make the high-temperature and high-pressure refrigerant provided by the compressor flow into the indoor heat exchanger through the heating path. After the indoor heat exchanger condenses the refrigerant and releases heat, it flows into the outdoor heat exchanger. Thus, it can be avoided that the high-temperature and high-pressure refrigerant flows into the heat dissipation channel, causing the temperature of the power control board to rise, thereby affecting the normal operation of the air conditioner. When the air conditioner is in the cooling mode, the first check valve can close the heating path, making the refrigerant with residual cold pass through the heat dissipation channel, absorb the heat of the power control board, and then enter the compressor, thereby reducing the temperature of the power control board and ensuring the normal operation of the air conditioner.

[0011] In some embodiments of the present application, the air conditioner further includes a four-way valve. The four-way valve includes a first valve port, a second valve port, a third valve port, and a fourth valve port. The compressor includes an inlet and an outlet, the inlet is connected to the first valve port, and the outlet is connected to the second valve port. The third valve port is connected to the outdoor heat exchanger, and the fourth valve port is connected to the heat dissipation component.

[0012] In this way, the four-way valve can control the flow direction of the high-temperature and high-pressure refrigerant flowing out of the compressor. When the high-temperature and high-pressure refrigerant flows into the four-way valve from the outlet of the compressor and the second valve port, and then flows into the outdoor heat exchanger through the third valve port, the outdoor heat exchanger condenses the high-temperature and high-pressure refrigerant into a low-temperature refrigerant. The low-temperature refrigerant then flows into the indoor heat exchanger. After evaporation in the indoor heat exchanger, the low-temperature refrigerant absorbs the heat in the room. Then the refrigerant absorbs the heat of the electronic control board through the heat dissipation component, and finally flows into the four-way valve through the fourth valve port, flows into the compressor through the first valve port, and after pressurization and temperature rise by the compressor, starts the next cycle, which is the refrigeration mode of the air conditioner; when the high-temperature and high-pressure refrigerant flows into the four-way valve from the outlet of the compressor and the second valve port, and then flows into the indoor heat exchanger through the third valve port, the indoor heat exchanger condenses the high-temperature and high-pressure refrigerant into a low-temperature refrigerant. The refrigerant releases heat to the room. The low-temperature refrigerant then flows into the outdoor heat exchanger. After evaporation in the outdoor heat exchanger, it finally flows into the four-way valve through the fourth valve port, flows into the compressor through the first valve port, and after pressurization and temperature rise by the compressor, starts the next cycle, which is the heating mode of the air conditioner.

[0013] Among them, the four-way valve can enable the air conditioner to switch between heating and refrigeration modes at will, and connecting the fourth valve port with the heat dissipation component can enable the low-temperature refrigerant to absorb the heat of the electronic control board through the heat dissipation component, increasing the temperature of the refrigerant. This not only improves the utilization rate of the refrigerant but also ensures the normal operation of the electronic control board.

[0014] In some embodiments of the present application, the air conditioner further includes a second one-way valve disposed between the heat dissipation component and the fourth valve port for enabling the refrigerant to flow from the heat dissipation component to the fourth valve port.

[0015] In this way, when the air conditioner is in the heating mode, the second one-way valve can enable the high-temperature and high-pressure refrigerant provided by the compressor to flow into the indoor heat exchanger through the heating path, preventing the high-temperature and high-pressure refrigerant from flowing into the heat dissipation channel. Thus, the temperature of the electronic control board rises, affecting the normal operation of the air conditioner; when the air conditioner is in the refrigeration mode, the second one-way valve can enable the refrigerant with residual cold to pass through the heat dissipation channel, absorb the heat of the electronic control board, enable the refrigerant to flow into the fourth valve port through the second one-way valve, and then enter the compressor, thereby reducing the temperature of the electronic control board and ensuring the normal operation of the air conditioner.

[0016] In some embodiments of the present application, the air conditioner further includes a solenoid valve disposed between the heat dissipation component and the indoor heat exchanger for controlling the connection or disconnection between the heat dissipation component and the indoor heat exchanger.

[0017] In this way, when the air conditioner is in the heating mode, the solenoid valve controls the heat dissipation component and the indoor heat exchanger to close, and no refrigerant flows into or out of the heat dissipation component to prevent the heating device from being damaged due to excessive refrigerant temperature. When the air conditioner is in the cooling mode, the solenoid valve controls the heat dissipation component and the indoor heat exchanger to communicate, allowing the refrigerant with residual cold to pass through the heat dissipation channel, absorbing the heat of the electronic control board, and enabling the refrigerant to flow into the fourth valve port through the second one-way valve and then enter the compressor, thereby reducing the temperature of the electronic control board and ensuring the normal operation of the air conditioner.

[0018] In some embodiments of the present application, the air conditioner further includes an electronic expansion valve, a first stop valve, and a second stop valve. The electronic expansion valve is arranged between the outdoor heat exchanger and the indoor heat exchanger; the first stop valve is arranged between the electronic expansion valve and the indoor heat exchanger; the second stop valve is arranged between the indoor heat exchanger, the solenoid valve, and the first one-way valve.

[0019] In this way, the air conditioner electronic expansion valve can effectively control the amount of refrigerant entering the indoor heat exchanger by adjusting the valve opening in combination with the superheat degree of the refrigeration cycle. When the heat of the indoor heat exchanger increases, the electronic expansion valve will increase its opening, and the refrigerant flow rate will increase accordingly; conversely, the refrigerant flow rate will decrease, ensuring that the refrigerant inside the copper pipe and the heat load inside the indoor heat exchanger can match.

[0020] Among them, the first stop valve and the second stop valve of the air conditioner can control the refrigerant flow rate. By adjusting the valve opening, the amount of refrigerant entering the evaporator can be precisely controlled, thereby adjusting the cooling effect of the air conditioner. When the indoor temperature needs to be lowered, the first stop valve or the second stop valve will increase the opening to allow more refrigerant to flow into the evaporator, enhancing the cooling effect; conversely, when the indoor temperature reaches the set value, the first stop valve or the second stop valve will decrease the opening to reduce the refrigerant flow rate and avoid overcooling.

[0021] In addition, the first stop valve and the second stop valve of the air conditioner can also adjust the pressure in the system. When the system pressure is too high, the first stop valve or the second stop valve will automatically close part of the passage to reduce the system pressure; conversely, when the system pressure is too low, the first stop valve or the second stop valve will increase the opening to increase the system pressure and ensure the stable operation of the system.

[0022] In some embodiments of the present application, the electronic control board includes a substrate and a heating element; the heating element is arranged on the substrate and connected to the substrate, and the heat dissipation component is arranged at the heating element, and the heat dissipation component is in thermal conduction with the heating element.

[0023] In this way, the heat dissipation component is thermally connected to the heating element. When the air conditioner is in the cooling mode, the refrigerant with residual cold can pass through the heat dissipation component, absorb the heat of the heating element, and make the refrigerant flow into the fourth valve port through the second one-way valve and then enter the compressor, thereby reducing the temperature of the heating element and preventing the heating element from overheating and malfunctioning, thus ensuring the normal operation of the air conditioner.

[0024] In some embodiments of the present application, the heat dissipation component includes: a housing and a heat dissipation pipe. An accommodation cavity is formed inside the housing; the heat dissipation pipe is disposed in the accommodation cavity. Both the housing and the heat dissipation pipe are thermally connected to the heating element, and two ends of the heat dissipation pipe are respectively communicated with the indoor heat exchanger and the compressor.

[0025] In this way, the heat dissipation pipe is thermally connected to the heating element, and the refrigerant with residual cold can pass through the heat dissipation pipe, absorb the heat of the heating element, and make the refrigerant flow into the fourth valve port through the second one-way valve and then enter the compressor, thereby reducing the temperature of the heating element and preventing the heating element from overheating and malfunctioning, thus ensuring the normal operation of the air conditioner; the housing can fix the heat dissipation pipe and prevent the heat dissipation pipe from being displaced or falling off during the operation of the air conditioner, resulting in the inability of the heat dissipation pipe to be thermally connected to the heating element and the heat dissipation pipe being unable to cool the heating element.

[0026] In some embodiments of the present application, the housing and the heat dissipation pipe are connected by a heat-conducting adhesive.

[0027] It can be understood that connecting the housing and the heat dissipation pipe by a heat-conducting adhesive can improve the heat conduction ability between the housing and the heat dissipation pipe, improve the heat conduction efficiency of the heat dissipation component, thereby effectively reducing the temperature of the heating element and preventing the heating element from overheating and malfunctioning, thus ensuring the normal operation of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings are used to provide a further understanding of the technical solutions of the present invention, and form a part of the specification. They are used together with the embodiments of the present application to explain the technical solutions of the present invention, and do not constitute a limitation to the technical solutions of the present invention.

[0029] Figure 1 It is a schematic diagram of the system of an air conditioner provided by an embodiment of the present application;

[0030] Figure 2 It is a schematic diagram of the structure of an air conditioner provided by an embodiment of the present application;

[0031] Figure 3 It is one of the schematic diagrams of the refrigerant flow provided by an embodiment of the present application;

[0032] Figure 4 It is a schematic diagram of the system of the four-way valve provided by an embodiment of the present application;

[0033] Figure 5 Schematic diagram of the heat dissipation component provided by the embodiment of the present application;

[0034] Figure 6 Front view of the heat dissipation component provided by the embodiment of the present application;

[0035] Figure 7 Second schematic diagram of the refrigerant flow provided by the embodiment of the present application;

[0036] Figure 8 Third schematic diagram of the refrigerant flow provided by the embodiment of the present application;

[0037] Figure 9 Schematic diagram of the valve position provided by the embodiment of the present application;

[0038] Figure 10 Schematic diagram of the connection between the electronic control board and the heat dissipation component provided by the embodiment of the present application;

[0039] Figure 11 First schematic diagram of the structure of the electronic control board provided by the embodiment of the present application;

[0040] Figure 12 Second schematic diagram of the structure of the electronic control board provided by the embodiment of the present application;

[0041] Figure 13 Schematic diagram of the structure of the heat dissipation component provided by the embodiment of the present application;

[0042] Figure 14 Exploded view of the heat dissipation component provided by the embodiment of the present application. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0044] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0046] In the description of this application, it should be noted that, unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. Additionally, when describing pipelines, the terms "connected" and "coupled" used in this application have the meaning of conducting. The specific meaning needs to be understood in combination with the context.

[0047] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0048] Currently, most of the heat dissipation methods for the heating module of the outdoor electronic control board of variable-frequency air conditioners on the market are natural wind heat dissipation and refrigerant heat dissipation. Natural wind heat dissipation is greatly affected by the ambient temperature and has a poor heat dissipation effect; for refrigerant heat dissipation, the refrigerant is the refrigerant with a relatively high temperature after heat exchange between the outdoor heat exchanger and the indoor heat exchanger, which is used to cool the heating module. This method has limited cooling effect on the heating module and the effect is not so good. Especially in a high-temperature environment, the temperature of the refrigerant after the outdoor heat exchanger and the indoor heat exchanger is nearly 50 degrees or more, and the cooling effect on the module is even worse.

[0049] However, in a high-temperature environment, both of these heat dissipation forms are limited. In order to make the air conditioner operate normally, frequency reduction or frequency limitation is often adopted to meet the use of the air conditioner, which makes the use effect of the air conditioner poor and the cooling capacity small. Adopting frequency reduction or frequency limitation operation results in serious attenuation of the refrigerating capacity and affects the use effect of the air conditioner; moreover, in a high-temperature or ultra-high-temperature environment, the heat dissipation effect is poor and the air conditioner cannot be used at full load. Therefore, the poor heat dissipation effect of the outdoor electronic control board is a problem that needs to be solved.

[0050] To solve the problem of the relatively poor heat dissipation effect of the outdoor electronic control board 40, as Figure 1 and Figure 2As shown in the figure, the present application provides an air conditioner 100, including: a compressor 10, an outdoor heat exchanger 20, an indoor heat exchanger 30, an electronic control board 40, and a heat dissipation assembly 50; one end of the outdoor heat exchanger 20 is communicated with the compressor 10; one end of the indoor heat exchanger 30 is communicated with the outdoor heat exchanger 20, and the other end of the indoor heat exchanger 30 is communicated with the compressor 10; the electronic control board 40 is arranged in the outdoor heat exchanger 20; the heat dissipation assembly 50 is arranged at the electronic control board 40, the heat dissipation assembly 50 is in thermal conduction with the electronic control board 40, the heat dissipation assembly 50 is used for cooling the electronic control board 40, and the heat dissipation assembly 50 is respectively communicated with the indoor heat exchanger 30 and the compressor 10.

[0051] The air conditioner 100, that is, an air conditioner, refers to a device that uses artificial means to adjust and control parameters such as the temperature, humidity, and flow rate of the air in a building or structure.

[0052] The air conditioner 100 provided by the embodiment of the present application includes an indoor heat exchanger 30 and an outdoor heat exchanger 20. The indoor heat exchanger 30 and the outdoor heat exchanger 20 are connected, and the refrigerant can circulate between the indoor heat exchanger 30 and the outdoor heat exchanger 20 and generate a reversible phase change. When the refrigerant generates a phase change, it can release or absorb heat. The refrigerant can exchange heat with the outdoor heat exchanger 20 in the outdoor heat exchanger 20, thereby releasing or absorbing heat; the refrigerant can exchange heat with the indoor heat exchanger 30 in the indoor heat exchanger 30, thereby releasing or absorbing heat.

[0053] Optionally, the compressor 10 can be a positive displacement compressor 10. Exemplarily, the positive displacement compressor 10 can be a piston compressor 10, a screw compressor 10, a scroll compressor 10, and a rolling piston compressor 10. The present application does not limit this.

[0054] Optionally, the compressor 10 can also be a dynamic compressor 10. The dynamic compressor 10 can be a centrifugal compressor 10, and the dynamic compressor 10 can also be an axial flow compressor 10. The present application does not limit this.

[0055] Wherein, when the air conditioner is in the cooling mode, the outdoor heat exchanger 20 can be a condenser, and the indoor heat exchanger 30 can be an evaporator. However, when the air conditioner is in the heating mode, the outdoor heat exchanger 20 can be an evaporator, and the indoor heat exchanger 30 can be a condenser.

[0056] Evaporators have various structural forms, such as shell-and-tube type, plate type, and flooded type, etc. These different structural forms have their own characteristics. For example, the shell-and-tube type evaporator has a compact structure, good contact between the liquid and the heat transfer surface, and a high heat transfer coefficient; while the plate type evaporator has the advantages of a large heat transfer area, light weight, and compact structure. The present application does not limit this.

[0057] When high-pressure liquid refrigerant enters the evaporator through the expansion valve, due to the atomization effect of the expansion valve, the liquid refrigerant turns into a mist; the misty refrigerant turns into a gas under low-pressure conditions and absorbs heat during the transformation process, reducing the surface temperature of the evaporator; the fan operates to deliver the air cooled by the evaporator to the outside of the body.

[0058] The condenser can be divided into horizontal shell-and-tube type, vertical shell-and-tube type, double-tube type, spiral plate type, plate type, etc., and this application does not limit it.

[0059] The air conditioner compressor 10 compresses the refrigerant gas into high-temperature and high-pressure gas, and then these gases enter the condenser. The condenser cools and dissipates heat from the gas. In the condenser, the high-temperature and high-pressure refrigerant gas dissipates heat through copper tubes and aluminum foil sheets and is transformed into a liquid. During this process, the cooling fan helps to accelerate heat dissipation. Inside the condenser, the pressure of the refrigerant remains unchanged, but the temperature will decrease, changing from a gas to a liquid, thereby releasing heat and increasing the surface temperature of the evaporator; the fan operates to deliver the air heated by the evaporator to the outside of the body.

[0060] The electronic control board 40 is a crucial component in the air conditioning system. It is responsible for controlling the operation of the outdoor unit of the air conditioner to ensure that the air conditioning system can work efficiently and stably. The electronic control board 40 ensures the normal operation of the air conditioning system by controlling devices such as the compressor 10 and the fan and monitoring the state of the air conditioning system. At the same time, the electronic control board 40 also has functions such as energy conservation and consumption reduction, improving comfort, extending the service life of equipment, and intelligent management.

[0061] The electronic control board 40 is mainly composed of parts such as a CPU, an input / output module, an A / D conversion module, and a display module. Among them, the CPU, as the core component, is responsible for controlling the operation of the entire system. The electronic control board 40 uses its internal computing and processing capabilities and the information collected by sensors to control and adjust the start and stop of the outdoor unit of the air conditioner, as well as devices such as the compressor 10, the fan, and the ventilation fan.

[0062] The electronic control board 40 real-time detects outdoor environmental parameters such as temperature and humidity through built-in sensors and transmits the data to the electronic control board 40.

[0063] After receiving the data transmitted by the sensors, the electronic control board 40 processes and analyzes the data. According to the preset parameter set values, the electronic control board 40 determines whether the current outdoor environment meets the requirements.

[0064] According to the result of data processing, the electronic control board 40 controls the operating state of the outdoor unit of the air conditioner by outputting control signals. For example, when the outdoor temperature is too high, the electronic control board 40 sends an instruction to the air conditioning system to start the compressor 10 for refrigeration.

[0065] The electronic control board 40 will also monitor the operating status of the air conditioning system through a feedback mechanism. For example, after the air conditioning system has been running for a period of time, the electronic control board 40 will detect changes in the outdoor environment and adjust the control signal based on the feedback data to achieve more precise control.

[0066] Since the electronic control board 40 is always in a working state during the operation of the air conditioner 100, when the air conditioner works continuously for too long or the adjusted temperature is too low, it will cause the compressor 10 to be overloaded, which will indirectly cause the outdoor unit controller to heat up due to processing more control signals. Therefore, a heat dissipation component 50 is needed to dissipate heat from the electronic control board 40.

[0067] Among them, when the air conditioner 100 cools, the refrigerant exchanges heat with the outdoor heat exchanger 20 of the outdoor heat exchanger 20 and releases heat. The refrigerant exchanges heat with the indoor heat exchanger 30 of the indoor heat exchanger 30 and absorbs heat, thereby achieving a cooling effect. When the air conditioner 100 heats, the refrigerant exchanges heat with the outdoor heat exchanger 20 of the outdoor heat exchanger 20 and absorbs heat. The refrigerant exchanges heat with the indoor heat exchanger 30 of the indoor heat exchanger 30 and releases heat, thereby achieving a heating effect.

[0068] In this way, the electronic control board 40 will continuously generate heat during the operation of the air conditioner, which will affect the normal operation of the air conditioner. When the air conditioner is in the cooling mode, the high-temperature and high-pressure refrigerant provided by the compressor 10 flows to the outdoor heat exchanger 20. The outdoor heat exchanger 20 condenses the high-temperature and high-pressure refrigerant into a low-temperature liquid refrigerant. Then the refrigerant flows to the indoor heat exchanger 30. The indoor heat exchanger 30 evaporates the low-temperature refrigerant, thereby absorbing the surrounding heat and reducing the indoor temperature. The refrigerant then heats up and then flows to the heat dissipation component 50.

[0069] However, there is still residual cold in the refrigerant after evaporation by the indoor heat exchanger 30, that is, the temperature of the refrigerant is still lower than the room temperature or the temperature at which the electronic control board 40 generates heat. By thermally connecting the heat dissipation component 50 to the electronic control board 40, the refrigerant in the heat dissipation component 50 can absorb the temperature of the electronic control board 40, preventing the electronic control board 40 from overheating and causing the air conditioner to malfunction. When the electronic control board 40 is in a high-temperature or ultra-high-temperature environment, it can still operate normally without often using frequency reduction or frequency limitation to meet the use of the air conditioner, which will make the use effect of the air conditioner poor, with small cooling capacity, resulting in serious attenuation of the cooling capacity and affecting the use effect of the air conditioner.

[0070] In some embodiments of the present application, as Figure 1 and Figure 2 shown, the air conditioner 100 further includes a heating passage 60. The two ends of the heating passage 60 are respectively connected to the indoor heat exchanger 30 and the compressor 10. A first one-way valve 61 is provided on the heating passage 60. The first one-way valve 61 is used to make the refrigerant flow from the compressor 10 to the indoor heat exchanger 30.

[0071] Among them, the first one-way valve 61 allows the refrigerant to flow from the compressor 10 to the indoor heat exchanger 30, preventing the refrigerant from flowing from the indoor heat exchanger 30 to the compressor 10 through the heating channel.

[0072] In addition, the first one-way valve 61 can be a lift check valve, swing check valve, butterfly check valve, elastic check valve, ball check valve, diaphragm check valve, plunger check valve, etc. The connection method between the first one-way valve 61 and the heating channel can be threaded connection, flange connection, welding or soldering, etc. This application does not limit this.

[0073] In this way, a heating path 60 is set for the air conditioner, and both ends of the heating path 60 are respectively connected to the indoor heat exchanger 30 and the compressor 10. When the air conditioner is in the heating mode, the first one-way valve 61 allows the high-temperature and high-pressure refrigerant provided by the compressor 10 to flow into the indoor heat exchanger 30 through the heating path 60. After the indoor heat exchanger 30 condenses the refrigerant and releases heat, it flows into the outdoor heat exchanger 20. Thus, it is possible to prevent the high-temperature and high-pressure refrigerant from flowing into the heat dissipation channel, increasing the temperature of the electronic control board 40 and affecting the normal operation of the air conditioner 100. When the air conditioner is in the cooling mode, the first one-way valve 61 can close the heating path 60, allowing the refrigerant with residual cold to pass through the heat dissipation channel, absorb the heat of the electronic control board 40, and then enter the compressor 10, thereby reducing the temperature of the electronic control board 40 and ensuring the normal operation of the air conditioner 100.

[0074] In some embodiments of the present application, as Figure 3 and Figure 4 shown, the direction of the arrow in the figure is the direction of refrigerant flow. The air conditioner 100 further includes: a four-way valve 70, and the four-way valve 70 includes: a first valve port 71, a second valve port 72, a third valve port 73, and a fourth valve port 74; the compressor 10 includes: an inlet 11 and an outlet 12, the inlet 11 is connected to the first valve port 71, and the outlet 12 is connected to the second valve port 72; the third valve port 73 is connected to the outdoor heat exchanger 20, and the fourth valve port 74 is connected to the heat dissipation assembly 50.

[0075] Among them, the four-way valve 70 is composed of a main slide valve, a pilot valve, an electromagnetic coil, etc. The main slide valve is the main component for realizing commutation, while the pilot valve and the electromagnetic coil are used to control the movement of the main slide valve.

[0076] When the electromagnetic coil is in the power-off state, the pilot slide valve moves leftward under the drive of the right compression spring. The high-pressure gas enters the capillary tube and then enters the right piston chamber. At the same time, the gas in the left piston chamber is discharged, forming a pressure difference, causing the piston and the main slide valve to move leftward, forming a refrigeration cycle.

[0077] When the electromagnetic coil is energized, the pilot slide valve moves to the right under the magnetic force generated by the electromagnetic coil, overcoming the tension of the compression spring. High-pressure gas enters the capillary and then enters the left piston chamber. At the same time, the gas in the right piston chamber is discharged, creating a pressure difference that causes the piston and the main slide valve to move to the right, forming a heating cycle.

[0078] In addition, the four-way valve 70 can be: a forced commutation type four-way reversing valve, a pressure relief commutation type four-way reversing valve, a dead-point-free commutation type four-way reversing valve, or a rotary commutation type four-way reversing valve. The forced commutation type four-way reversing valve directly draws high-pressure gas from the exhaust port of the compressor 10 through a capillary to drive the main valve to commutate. This type of four-way valve 70 consists of a main valve and a four-way pilot valve. The pressure relief commutation type four-way reversing valve connects one end of the main valve of the four-way valve 70 to the suction port of the compressor 10 through a capillary to relieve its pressure, thereby achieving the purpose of commutation. This type of four-way valve 70 consists of a main valve and a three-way pilot valve. The dead-point-free commutation type four-way reversing valve will not cause the main valve slider to stay in the middle position of the main valve whether it is energized or de-energized. There are three capillaries connected to the main valve on the pilot valve of the dead-point-free commutation type four-way valve 70, but its function is different from that of the above-mentioned three-way pilot valve. The rotary commutation type four-way reversing valve uses the rotary commutation principle for all of this type of four-way valve 70. This application does not make any limitations in this regard.

[0079] In this way, as Figure 5 、 Figure 6 、 Figure 7 and Figure 8 shown, the direction of the arrow in the figure is the direction of refrigerant flow. The four-way valve 70 can control the flow direction of the high-temperature and high-pressure refrigerant flowing out of the compressor 10. When the high-temperature and high-pressure refrigerant flows into the four-way valve 70 from the outlet 12 of the compressor 10 and the second valve port 72, and then flows through the third valve port 73 into the outdoor heat exchanger 20, the outdoor heat exchanger 20 condenses the high-temperature and high-pressure refrigerant into a low-temperature refrigerant. The low-temperature refrigerant then flows into the indoor heat exchanger 30. After evaporation in the indoor heat exchanger 30, the low-temperature refrigerant absorbs the heat in the room. Then the refrigerant absorbs the heat of the electronic control board 40 through the heat dissipation component 50, and finally flows into the four-way valve 70 through the fourth valve port 74, and flows into the compressor 10 through the first valve port 71. After being pressurized and heated by the compressor 10, the next cycle begins, which is the refrigeration mode of the air conditioner; when the high-temperature and high-pressure refrigerant flows into the four-way valve 70 from the outlet 12 of the compressor 10 and the second valve port 72, and then flows through the third valve port 73 into the indoor heat exchanger 30, the indoor heat exchanger 30 condenses the high-temperature and high-pressure refrigerant into a low-temperature refrigerant. The refrigerant releases heat to the room. The low-temperature refrigerant then flows into the outdoor heat exchanger 20. After evaporation in the outdoor heat exchanger 20, it finally flows into the four-way valve 70 through the fourth valve port 74, and flows into the compressor 10 through the first valve port 71. After being pressurized and heated by the compressor 10, the next cycle begins, which is the heating mode of the air conditioner.

[0080] Among them, the four-way valve 70 can enable the air conditioner to freely switch between the heating or cooling modes, and connect the fourth valve port 74 to the heat dissipation component 50, so that the low-temperature refrigerant can pass through the heat dissipation component 50 to absorb the heat of the electronic control board 40, increasing the temperature of the refrigerant. This not only improves the utilization rate of the refrigerant, but also ensures the normal operation of the electronic control board 40.

[0081] In some embodiments of the present application, as Figure 9 shown, the direction of the arrow in the figure is the direction of refrigerant flow. The air conditioner 100 further includes a second check valve 81 disposed between the heat dissipation component 50 and the fourth valve port 74 for allowing the refrigerant to flow from the heat dissipation component 50 to the fourth valve port 74.

[0082] Among them, the second check valve 81 can allow the refrigerant to flow from the heat dissipation channel to the fourth valve port 74, preventing the refrigerant from flowing from the fourth valve port 74 to the heat dissipation channel.

[0083] In addition, the second check valve 81 can be a lift check valve, swing check valve, butterfly check valve, elastic check valve, ball check valve, diaphragm check valve, plunger check valve, etc. The connection method between the first check valve 61 and the heating channel can be threaded connection, flange connection, welding or soldering, etc. The present application does not limit this.

[0084] In this way, when the air conditioner is in the heating mode, the second check valve 81 can allow the high-temperature and high-pressure refrigerant provided by the compressor 10 to flow into the indoor heat exchanger 30 through the heating path 60, preventing the high-temperature and high-pressure refrigerant from flowing into the heat dissipation channel. Thus, the temperature of the electronic control board 40 increases, affecting the normal operation of the air conditioner 100. When the air conditioner is in the cooling mode, the second check valve 81 can allow the refrigerant with residual cold to pass through the heat dissipation channel, absorb the heat of the electronic control board 40, and allow the refrigerant to flow into the fourth valve port 74 through the second check valve 81 and then enter the compressor 10, thereby reducing the temperature of the electronic control board 40 and ensuring the normal operation of the air conditioner 100.

[0085] In some embodiments of the present application, as Figure 9 shown, the direction of the arrow in the figure is the direction of refrigerant flow. The air conditioner 100 further includes a solenoid valve 82 disposed between the heat dissipation component 50 and the indoor heat exchanger 30 for controlling the connection or disconnection between the heat dissipation component 50 and the indoor heat exchanger 30.

[0086] Among them, the solenoid valve 82 is an industrial device controlled by electricity. As a basic automation component for controlling fluids, it is not limited to hydraulic and pneumatic systems. The main function of the solenoid valve 82 is to adjust the direction, flow rate, speed and other parameters of the medium in the industrial control system. By cooperating with different circuits, the solenoid valve 82 can achieve precise and flexible control.

[0087] Inside the solenoid valve 82, there is a sealed cavity with through holes at different positions, and each hole is connected to a different oil pipe. In the middle of the cavity is a piston, and on both sides are two electromagnets. When the electromagnet coil is energized, the valve body will be attracted to the corresponding side, and by controlling the movement of the valve body, different oil discharge holes can be opened or closed. The oil inlet hole is always open, so hydraulic oil will enter different oil discharge pipes, and then the piston of the oil cylinder is pushed by the pressure of the oil. The piston drives the piston rod, and the piston rod drives the mechanical device, thus realizing the control of the fluid.

[0088] The solenoid valve 82 in this application can adopt: direct-acting solenoid valve 82, step-by-step direct-acting solenoid valve 82 or pilot-operated solenoid valve 82, and this application does not limit this.

[0089] Among them, when the direct-acting solenoid valve 82 is energized, the electromagnetic coil generates electromagnetic force to lift the closing member, and the valve opens; when it is de-energized, the spring presses the closing member on the valve seat, and the valve closes. The step-by-step direct-acting solenoid valve 82 combines the direct-acting and pilot-operated principles and is suitable for zero pressure difference or vacuum and high-pressure environments. When the pilot-operated solenoid valve 82 is energized, the electromagnetic force opens the pilot hole, and the fluid pressure pushes the closing member to move, realizing the opening or closing of the valve.

[0090] In this way, when the air conditioner is in the heating mode, the solenoid valve 82 controls the heat dissipation component 50 and the indoor heat exchanger 30 to close, and no refrigerant flows into or out of the heat dissipation component 50 to prevent the refrigerant from damaging the heating device due to excessive temperature; when the air conditioner is in the cooling mode, the solenoid valve 82 controls the heat dissipation component 50 and the indoor heat exchanger 30 to communicate, and the refrigerant with residual cold can pass through the heat dissipation channel, absorb the heat of the electronic control board 40, and make the refrigerant flow into the fourth valve port 74 through the first check valve 81, and then enter the compressor 10, thereby reducing the temperature of the electronic control board 40 and ensuring the normal operation of the air conditioner 100.

[0091] In some embodiments of this application, as Figure 9 shown, the direction of the arrow in the figure is the direction of refrigerant flow. The air conditioner 100 further includes an electronic expansion valve 83, a first stop valve 84 and a second stop valve 85. The electronic expansion valve 83 is arranged between the outdoor heat exchanger 20 and the indoor heat exchanger 30; the first stop valve 84 is arranged between the electronic expansion valve 83 and the indoor heat exchanger 30; the second stop valve 85 is arranged between the indoor heat exchanger 30 and the solenoid valve 82 and the first check valve 61.

[0092] In this way, the air conditioner electronic expansion valve 83 can combine the superheat degree of the refrigeration section and effectively control the amount of refrigerant entering the indoor heat exchanger 30 by adjusting the opening of the valve. When the heat of the indoor heat exchanger 30 increases, the electronic expansion valve 83 will increase its opening, and the refrigerant flow rate will increase accordingly; conversely, the refrigerant flow rate will decrease, which can ensure that the refrigerant inside the copper pipe and the heat load inside the indoor heat exchanger 30 can match.

[0093] Among them, the first cut-off valve 84 and the second cut-off valve 85 of the air conditioner can control the refrigerant flow rate. By adjusting the valve opening, the amount of refrigerant entering the evaporator can be precisely controlled, thereby adjusting the refrigeration effect of the air conditioner. When the indoor temperature needs to be reduced, the first cut-off valve 84 or the second cut-off valve 85 will increase the opening to allow more refrigerant to flow into the evaporator, enhancing the refrigeration effect; conversely, when the indoor temperature reaches the set value, the first cut-off valve 84 or the second cut-off valve 85 will decrease the opening to reduce the refrigerant flow rate and avoid excessive refrigeration.

[0094] In addition, the first cut-off valve 84 and the second cut-off valve 85 of the air conditioner can also adjust the pressure in the system. When the system pressure is too high, the first cut-off valve 84 or the second cut-off valve 85 will automatically close part of the passage to reduce the system pressure; conversely, when the system pressure is too low, the first cut-off valve 84 or the second cut-off valve 85 will increase the opening to increase the system pressure and ensure the stable operation of the system.

[0095] In addition, the electronic expansion valve 83 can be of two types: direct-acting type and reduction type. The direct-acting type directly drives the needle valve, while the reduction type amplifies the magnetic torque through a reduction gear set. This application does not make a limitation on this.

[0096] In some embodiments of this application, as Figure 10 、 Figure 11 and Figure 12 shown, the electronic control board 40 includes: a substrate 41 and a heating element 42; the heating element 42 is disposed on the substrate 41 and is connected to the substrate 41, and a heat dissipation assembly 50 is disposed at the heating element 42, and the heat dissipation assembly 50 is thermally conductive to the heating element 42.

[0097] Among them, the substrate 41 is a basic material for carrying and connecting electronic components, provides a stable installation platform for electronic components, realizes electrical connection between electronic components through wiring, has certain heat dissipation performance and electrical insulation performance, and ensures the stable operation of the electronic control board 40. The substrate 41 can adopt phenolic PCB paper substrate 41, composite PCB substrate 41, glass fiber PCB substrate 41, etc. This application does not make a limitation on this.

[0098] In this way, by making the heat dissipation assembly 50 thermally conductive to the heating element 42, when the air conditioner is in the refrigeration mode, the refrigerant with residual cold can pass through the heat dissipation assembly 50, absorb the heat of the heating element 42, make the refrigerant flow into the fourth valve port 74 through the second one-way valve 81, and then enter the compressor 10, thereby reducing the temperature of the heating element 42 and avoiding the heating element 42 from overheating and being unable to work properly, so as to ensure the normal operation of the air conditioner 100.

[0099] In a possible structural design, the heating element 42 is arranged on one side of the substrate 41, and the heat dissipation assembly 50 is arranged on the other side of the substrate 41 away from the heating element 42. Both the heat dissipation assembly 50 and the heating assembly are connected to the substrate 41. The heat dissipation assembly 50 and the heating assembly are arranged relative to the substrate 41, and the heat dissipation assembly 50 and the heating assembly are thermally conductive.

[0100] In this way, the substrate 41 can carry and connect the heating element 42 and the heat dissipation assembly 50, provide a stable installation platform for the heating element 42 and the heat dissipation assembly 50, make the installation of the heating element 42 and the heat dissipation assembly 50 stable, and prevent the heat dissipation assembly 50 from falling off or being misaligned during the operation of the air conditioner 100, resulting in the heat dissipation assembly 50 being unable to effectively dissipate heat from the heating element 42. Arranging the heat dissipation assembly 50 and the heating assembly relative to the substrate 41 can make the heat dissipation assembly 50 closer to the heating element 42, better achieve the thermal conductivity between the heat dissipation assembly 50 and the heating assembly, and improve the heat dissipation effect of the heat dissipation assembly 50.

[0101] In another possible structural design, the heating element 42 is arranged on one side of the substrate 41, and the heating element 42 is connected to the substrate 41. The heat dissipation assembly 50 is arranged on the side of the heating element 42 away from the substrate 41, and the heat dissipation assembly 50 is connected to the heating assembly.

[0102] In this way, the substrate 41 may affect the thermal conductivity between the heat dissipation assembly 50 and the heating assembly. Connecting the heat dissipation assembly 50 directly to the heating element 42 can make the heat dissipation assembly 50 closer to the heating element 42, better achieve the thermal conductivity between the heat dissipation assembly 50 and the heating assembly, and improve the heat dissipation effect of the heat dissipation assembly 50.

[0103] In some embodiments of the present application, as Figure 13 and Figure 14 shown, the heat dissipation assembly 50 includes: a housing 51 and a heat dissipation pipe 52. An accommodation cavity is formed inside the housing 51; the heat dissipation pipe 52 is arranged in the accommodation cavity. Both the housing 51 and the heat dissipation pipe 52 are thermally conductive with the heating element 42. Two ends of the heat dissipation pipe 52 are respectively communicated with the indoor heat exchanger 30 and the compressor 10.

[0104] In this way, the heat dissipation pipe 52 is thermally conductive with the heating element 42, allowing the refrigerant with residual cold to pass through the heat dissipation pipe 52, absorb the heat of the heating element 42, and make the refrigerant flow into the fourth valve port 74 through the second one-way valve 81 and then enter the compressor 10, thereby reducing the temperature of the heating element 42 and preventing the heating element 42 from overheating and being unable to work properly, thus ensuring the normal operation of the air conditioner 100; the housing 51 can fix the heat dissipation pipe 52 and prevent the heat dissipation pipe 52 from being misaligned or falling off during the operation of the air conditioner, resulting in the heat dissipation pipe 52 being unable to be thermally conductive with the heating element 42 and the heat dissipation pipe 52 being unable to cool the heating element 42.

[0105] Among them, both the housing 51 and the heat dissipation pipe 52 can be made of materials with good thermal conductivity. The materials with good thermal conductivity can be divided into metal thermal conductive materials and non-metal thermal conductive materials. The metal thermal conductive materials can be silver, copper, aluminum, etc.; the non-metal thermal conductive materials can be graphene, carbon fiber composite materials, aluminum matrix composite materials, etc., and the present application does not limit this.

[0106] Among them, the housing 51 and the heat dissipation pipe 52 can be made of the same material or different materials, and the present application does not limit this.

[0107] In a possible structural design, the housing 51 is made of aluminum, and the heat dissipation pipe 52 is made of copper.

[0108] In this way, copper has good thermal conductivity, which can enable the heat dissipation pipe 52 to have better heat conduction ability, so that the heat dissipation pipe 52 can better absorb the heat of the heating element 42 and improve the heat dissipation efficiency of the heat dissipation pipe 52. Aluminum has good thermal stability, which can prevent the housing 51 from deforming at high temperatures, thereby affecting the normal heat dissipation of the heat dissipation pipe 52. Moreover, the costs of copper and aluminum are relatively low, which can reduce the manufacturing cost of the heat dissipation component 50.

[0109] In a possible structural design, as Figure 13 and Figure 14 shown, the heat dissipation pipe 52 can be U-shaped, and the housing 51 is provided with a U-shaped groove corresponding to the heat dissipation pipe 52, and the U-shaped groove is used to limit the heat dissipation pipe 52.

[0110] In this way, the housing 51 can limit the heat dissipation pipe 52 to prevent the heat dissipation pipe 52 from falling off or being misaligned, so that the heat dissipation pipe 52 cannot conduct heat with the heating element 42, resulting in the heat dissipation pipe 52 being unable to cool the heating element 42. Moreover, setting the heat dissipation pipe 52 to be U-shaped can increase the heat conduction area between the heat dissipation pipe 52 and the heating element 42, making the heat conduction efficiency of the heat dissipation pipe 52 higher, thereby improving the heat dissipation efficiency of the heat dissipation pipe 52.

[0111] Among them, the heat dissipation pipe 52 can also be set to be M-shaped, S-shaped or other shapes, and the present application does not limit this.

[0112] In some embodiments of the present application, the housing 51 and the heat dissipation pipe 52 are connected by thermal conductive glue.

[0113] Among them, the thermal conductive adhesive is a one-component, heat-conducting, room-temperature-curing silicone bonding and sealing adhesive. The thermal conductive adhesive has excellent thermal conductivity. Its thermal conductivity after curing is usually in the range of 1.1-1.5 W / (m·k), providing a high-guarantee heat dissipation coefficient for electronic products. The thermal conductive adhesive has superior electrical properties, including aging resistance, resistance to thermal cycling, moisture resistance without swelling, electrical insulation properties, etc., increasing the safety factor of electronic products during use. The thermal conductive adhesive has good adhesion to electronic components, aluminum, plastics such as PVC and PBT, etc., and at the same time plays an excellent role in sealing, bonding and heat conduction. The thermal conductive adhesive has a fast curing speed, is easy to extrude but does not flow, is convenient to operate, and can be manually applied or mechanically applied, meeting any working environment and working conditions. The thermal conductive adhesive has excellent high and low temperature resistance, can withstand a short-term high temperature of 300 degrees, a long-term high temperature of 280 degrees, and a low temperature of -60 degrees.

[0114] In addition, the thermal conductive adhesive can be selected from silicone thermal conductive adhesives, epoxy resin AB adhesives, acrylic thermal conductive adhesives, polyurethane thermal conductive adhesives, etc. This application does not limit this.

[0115] It can be understood that by connecting the housing 51 and the heat dissipation pipe 52 with the thermal conductive adhesive, the heat conduction ability between the housing 51 and the heat dissipation pipe 52 can be improved, the heat conduction efficiency of the heat dissipation component 50 can be improved, thereby effectively reducing the temperature of the heating element 42 and preventing the heating element 42 from overheating and unable to work properly, so as to ensure the normal operation of the air conditioner 100.

[0116] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any change or replacement within the technical scope disclosed in this application should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. An air conditioner, characterized in that, Comprising: Compressor; Outdoor heat exchanger, one end of which is connected to the compressor; Indoor heat exchanger, one end of which is connected to the outdoor heat exchanger, and the other end of the indoor heat exchanger is connected to the compressor; Electric control board, which is arranged in the outdoor heat exchanger; Heat dissipation component, which is arranged at the electric control board, the heat dissipation component is in thermal conduction with the electric control board, the heat dissipation component is used to cool down the electric control board, and the heat dissipation component is respectively connected to the indoor heat exchanger and the compressor.

2. The air conditioner according to claim 1, characterized in that The air conditioner further includes; Heating path, both ends of which are respectively connected to the indoor heat exchanger and the compressor, and a first check valve is arranged on the heating path, and the first check valve is used to make the refrigerant flow from the compressor to the indoor heat exchanger.

3. The air conditioner according to claim 2, wherein, The air conditioner further includes: Four-way valve, the four-way valve includes: a first valve port, a second valve port, a third valve port and a fourth valve port; The compressor includes: an inlet and an outlet, the inlet is connected to the first valve port, and the outlet is connected to the second valve port; The third valve port is connected to the outdoor heat exchanger, and the fourth valve port is connected to the heat dissipation component.

4. The air conditioner according to claim 3, characterized in that, The air conditioner further includes; Second check valve, which is arranged between the heat dissipation component and the fourth valve port and is used to make the refrigerant flow from the heat dissipation component to the fourth valve port.

5. The air conditioner according to claim 2, characterized in that, The air conditioner further includes; Solenoid valve, which is arranged between the heat dissipation component and the indoor heat exchanger and is used to control the connection or closing between the heat dissipation component and the indoor heat exchanger.

6. The air conditioner according to claim 5, characterized in that, The air conditioner further includes; Electronic expansion valve, which is arranged between the outdoor heat exchanger and the indoor heat exchanger; First shut-off valve, which is arranged between the electronic expansion valve and the indoor heat exchanger; Second shut-off valve, which is arranged between the indoor heat exchanger and the solenoid valve and the first check valve.

7. The air conditioner according to claim 1, characterized in that The electric control board includes: Substrate; Heating element, which is arranged on the substrate and is connected to the substrate, the heat dissipation component is arranged at the heating element, and the heat dissipation component is in thermal conduction with the heating element.

8. The air conditioner according to claim 7, characterized in that, The heat dissipation component includes: Shell, an accommodation cavity is formed inside the shell; Heat dissipation pipeline, which is arranged in the accommodation cavity, both the shell and the heat dissipation pipeline are in thermal conduction with the heating element, and both ends of the heat dissipation pipeline are respectively connected to the indoor heat exchanger and the compressor.

9. The air conditioner according to claim 8, characterized in that, The shell and the heat dissipation pipeline are connected by thermal conductive glue.

10. An air conditioner, characterized in that, Comprising: Compressor; Outdoor heat exchanger, one end of which is connected to the compressor; Indoor heat exchanger, one end of which is connected to the outdoor heat exchanger, and the other end of the indoor heat exchanger is connected to the compressor; Electric control board, which is arranged in the outdoor heat exchanger; Heat dissipation component, the heat dissipation component is in thermal conduction with the electric control board, the heat dissipation component is used to cool down the electric control board, and the heat dissipation component is respectively connected to the indoor heat exchanger and the compressor.

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