Air conditioner outdoor unit

Abstract

The utility model discloses an outdoor unit of an air conditioner, which comprises a liquid side pipe in which a refrigerant flows in a liquid form; a gas-side pipe in which the refrigerant flows in the form of a gas; a plurality of electronic elements are arranged in the electric appliance box, and a heat source is formed when the electronic elements work; the electrical box comprises: a liquid cooling module comprising: a first flow guide pipeline configured to be in fluid connection with a liquid side pipe; the second flow guide pipeline is configured to be in fluid connection with the gas side piping; the micro-channel unit is configured to be in fluid connection with the first flow guide pipeline and the second flow guide pipeline; and a refrigerant in the liquid side piping flows into the liquid cooling module from the first flow guide pipeline, passes through the micro-channel unit, and flows out to the gas side piping from the second flow guide pipeline. And during ultra-high-temperature refrigeration or ultra-high-temperature water heating, a heat source is in a high-load and high-power-density state, the heat productivity is high, and a refrigerant is subjected to phase change in the micro-channel unit, namely, the refrigerant is converted into a gas state from a liquid state, so that the heat exchange capacity is remarkably enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning equipment technical field especially relates to a kind of air conditioner outdoor unit. BACKGROUND

[0002] The air conditioning system in prior art can meet the needs of super-high temperature refrigeration and super-high temperature hot water, wherein the super-high temperature refrigeration refers to that the air conditioning system can still effectively refrigerate in extreme high temperature environment, for example, normal work in the environment above 50 DEG C, even provide stable refrigeration effect in the environment of 60 DEG C;The super-high temperature hot water refers to that normal hot water supply is provided in extreme low temperature, for example, provide hot water above 60 DEG C under the condition that refrigerant temperature is about 10 DEG C.The super-high temperature refrigeration and super-high temperature hot water rely on more efficient compressor, heat exchanger and new type refrigerant.While realizing the above functions, the air conditioning system also requires that the compressor works under higher load.The working load of electric control module and frequency converter driver in air conditioning system will also increase under high-power working condition, and higher heat is generated;The electric appliance box needs to be effectively cooled to ensure that each electronic component does not fail or performance decreases due to overheating.

[0003] The air conditioning system itself in prior art uses refrigerant to cool the electric appliance box.The electric appliance box adopts closed design, and the heat source is enclosed therein, and the heat is transferred to the refrigerant through the heat dissipation pipeline;The refrigerant circuit can finally take away the heat, and discharge it to the outside through the heat exchanger (for example, condenser).However, for the super-high temperature refrigeration scene, the temperature of refrigerant is above 60 DEG C, and the refrigerant cannot be a good heat sink;And in the super-high temperature hot water scene, the air temperature is as high as 60 DEG C, and the refrigerant temperature is only 10 DEG C, which is very easy to appear condensation, and there is a safety risk.The stability of the electric appliance box cooling mode in prior art is poor under high load working condition, and there is a risk of condensation.

[0004] The above information disclosed in the background is only used to increase the understanding of the background of the present application, therefore, it can include prior art known by those skilled in the art. UTILITY MODEL CONTENT

[0005] In view of the problems that the air conditioning system itself in prior art uses refrigerant to cool the electric appliance box, and the stability is poor and there is a risk of condensation in the super-high temperature refrigeration and super-high temperature hot water scene, the present application designs and provides an air conditioner outdoor unit.

[0006] In some embodiments of the present application, an air conditioner outdoor unit comprises: a liquid side pipe in which a refrigerant flows in a liquid form; a gas side pipe in which the refrigerant flows in a gas form; an electrical box in which a plurality of electronic components are arranged, the plurality of electronic components generating heat sources when working; the electrical box comprising: a liquid cooling module comprising: a first flow guide pipe configured to be fluidly connected to the liquid side pipe; a second flow guide pipe configured to be fluidly connected to the gas side pipe; and a micro-channel unit configured to be fluidly connected to the first flow guide pipe and the second flow guide pipe; the refrigerant in the liquid side pipe flowing into the liquid cooling module from the first flow guide pipe, passing through the micro-channel unit, and then flowing out to the gas side pipe from the second flow guide pipe.

[0007] The above technical solution has the following advantages or beneficial effects: when super-high-temperature refrigeration or super-high-temperature heating water is performed, the heat source is in a high-load high-power density state, the heat generation is high, and the refrigerant in the micro-channel unit will undergo a phase change, i.e., from a liquid state to a gas state, which will significantly enhance the heat exchange capacity, i.e., use latent heat to dissipate heat, and meet the heat dissipation demand of super-high load.

[0008] In some embodiments of the present application, the air conditioner outdoor unit further comprises: an adjusting element arranged between the first flow guide pipe and the liquid side pipe; the adjusting element being used to adjust the flow of the refrigerant in the liquid cooling module; when the air conditioner outdoor unit is turned off, the adjusting element is in a closed state.

[0009] The above technical solution has the following advantages or beneficial effects: the flow of the refrigerant in the liquid cooling module is adjusted by the adjusting element; the adjusting element is kept in a closed state when the machine is stopped, so that the liquid cooling module is kept in a relatively high pressure state, thereby providing stable heat dissipation effect in the starting stage.

[0010] In some embodiments of the present application, the electrical box further comprises: a heat equalizing module arranged on one side of the liquid cooling module; the heat equalizing module having: a heat conduction main body having: a first heat conduction end face in contact with the liquid cooling module; and a second heat conduction end face in contact with the heat source.

[0011] The above technical solution has the following advantages or beneficial effects: the heat equalizing module disperses the local heat to the entire plane area through heat conduction, avoiding local overheating and overcooling, and reducing the temperature gradient.

[0012] In some embodiments of the present application, the heat conduction main body is made of a heat conductive material.

[0013] The above technical solution has the following advantages or beneficial effects: the heat conduction main body is made of a high-heat-conductivity material to improve the heat equalizing effect.

[0014] In some embodiments of the present application, the electric appliance box further comprises a support module configured to form at least one mounting cavity in which the heat source and the second heat-conducting end face are located and contact each other.

[0015] The above technical solution has the following advantages or beneficial effects: the support module can further integrate the design of the electric appliance box, so that the size of the heat dissipation part is smaller, and a more reasonable assembly scheme is provided.

[0016] In some embodiments of the present application, the liquid cooling module is further provided with a dehumidification fin.

[0017] The above technical solution has the following advantages or beneficial effects: the dehumidification fin increases the contact area with air to enhance heat exchange; by cooling the water vapor in the air, the water vapor is condensed into water droplets, which are then discharged or evaporated by a water collecting groove and the like, so that the moisture in the air is effectively removed, and the condensed water is prevented from flowing in the electric appliance box.

[0018] In some embodiments of the present application, the electric appliance box comprises a housing in which the liquid cooling module is installed, and a heat dissipation fan is further arranged in the housing.

[0019] The above technical solution has the following advantages or beneficial effects: the heat dissipation fan accelerates the air flow by forced convection, thereby improving the heat dissipation speed.

[0020] In some embodiments of the present application, the housing is further provided with a heat dissipation air duct, and the heat dissipation fan is arranged in the heat dissipation air duct.

[0021] The above technical solution has the following advantages or beneficial effects: the heat dissipation fan is arranged in the heat dissipation air duct, which can further enhance the directional flow of air, reduce turbulence, and improve the heat dissipation efficiency for high-power or high-density scenarios in a limited space.

[0022] In some embodiments of the present application, the housing comprises a first shell in which the heat dissipation fan is arranged, and a second shell in which the liquid cooling module is arranged; the first shell and the second shell are detachably fixedly connected; the heat dissipation air duct comprises an air inlet opening arranged on the first shell, the heat dissipation fan being located at the air inlet opening; an air outlet opening arranged on the first shell; and an air duct volute arranged on the second shell, the liquid cooling module being arranged in the air duct volute; the heat dissipation fan guides air to enter from the air inlet opening, pass through the air duct volute, and flow out from the air outlet opening.

[0023] The above technical solution has the following advantages or beneficial effects: the heat dissipation air duct is used to realize the air flow between the first shell and the second shell, and the inner and outer layers are circulated to dissipate heat.

[0024] In some embodiments of the present application, a first temperature sensor is arranged on the first shell; the electronic component comprises a power module, and a second temperature sensor is arranged in the power module.

[0025] The above technical solution has the following advantages or beneficial effects: the first temperature sensor and the second temperature sensor provide a data basis for the action of the adjusting element, so that the heat dissipation of the liquid cooling module is more effective, and condensation is avoided.

[0026] Other characteristics and advantages of the present application will become more apparent after reading the detailed description of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0028] Figure 1 Structure diagram of a liquid cooling module in an outdoor unit of an air conditioner according to some embodiments of the present application;

[0029] Figure 2 Structure diagram of a refrigeration cycle in an outdoor unit of an air conditioner according to some embodiments of the present application;

[0030] Figure 3 Structure diagram of a refrigeration cycle in an outdoor unit of an air conditioner according to some embodiments of the present application;

[0031] Figure 4 Structure diagram of a refrigeration cycle in an outdoor unit of an air conditioner according to some embodiments of the present application;

[0032] Figure 5 Structure diagram of a refrigeration cycle in an outdoor unit of an air conditioner according to some embodiments of the present application;

[0033] Figure 6 Partial structure diagram of an electrical box in an outdoor unit of an air conditioner according to some embodiments of the present application;

[0034] Figure 7 Partial structure diagram of an electrical box in an outdoor unit of an air conditioner according to some embodiments of the present application;

[0035] Figure 8 Partial structure diagram of an electrical box in an outdoor unit of an air conditioner according to some embodiments of the present application;

[0036] Figure 9 Part structure schematic view of the electric appliance box in the outdoor unit of the air conditioner provided by some embodiments of the utility model;

[0037] Figure 10 Part structure schematic view of the electric appliance box in the outdoor unit of the air conditioner provided by some embodiments of the utility model;

[0038] In the figure: 100, liquid side pipe; 102, gas side pipe; 104, liquid cooling module; 106, first flow guide pipeline; 108, second flow guide pipeline; 110, microchannel unit; 120, compressor; 122, oil separator; 124, four-way valve; 126, gas-liquid separator; 128, oil return capillary; 130, adjusting element; 132, check valve; 134, indoor heat exchanger; 136, cover shell; 138, heat equalizing module; 140, support module; 142, power module; 144, main control board; 146, heat conduction main body; 148, first heat conduction end face; 150, second heat conduction end face; 152, end plate; 154, dehumidification fin; 156, heat dissipation fan; 158, air duct volute; 160, first shell; 162, return air inlet; 164, second shell. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0040] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0041] The terms "first", "second", are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "a plurality of" means two or more.

[0042] In the description of the present application, it should be noted that unless specifically stated and limited otherwise, the terms "mounting", "connected", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise specifically stated and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0044] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0045] The following description will be made with reference to the accompanying drawings Figures 1 to 10 The embodiments of the air conditioner outdoor unit provided by the present application will be described.

[0046] The air conditioner outdoor unit is a component of an air conditioning system.

[0047] The air conditioning system includes performing a refrigeration cycle of the air conditioning system by using a compressor, a condenser, a throttling element and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and refrigeration or heating of an indoor space.

[0048] The low-temperature and low-pressure refrigerant enters the compressor, which compresses the refrigerant gas into a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0049] The throttling element (for example, an electronic expansion valve) expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the condenser into low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the electronic expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by exchanging heat with a material to be cooled using latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioning system can adjust the temperature of the indoor space.

[0050] The air conditioning outdoor unit refers to the portion of the refrigerant cycle including the compressor and the outdoor heat exchanger, and the air conditioning indoor unit includes the indoor heat exchanger. The electronic expansion valve can be installed in the air conditioning outdoor unit and / or the indoor unit.

[0051] The indoor heat exchanger 134 and the outdoor heat exchanger serve as a condenser or an evaporator. As shown in FIG. 1, when the indoor heat exchanger 134 serves as a condenser, the air conditioning system functions as a heater in a heating mode; as shown in FIG. 2, when the indoor heat exchanger 134 serves as an evaporator, the air conditioning system functions as a cooler in a cooling mode. Figure 3 Figure 2

[0052] The air conditioning outdoor unit is connected to the air conditioning indoor unit through a liquid-side pipe 100 and a gas-side pipe 102: the refrigerant flows in a liquid form in the liquid-side pipe 100, which is mainly used to transport the liquid refrigerant from the condenser to the throttling element and then to the evaporator; the refrigerant flows in a gas form in the gas-side pipe 102, which is mainly used to transport the gaseous refrigerant from the evaporator to the compressor 120, and then to the condenser after being compressed by the compressor 120.

[0053] It should be noted that "flowing in a liquid form" and "flowing in a gas form" described herein are not always absolutely complete liquid form and gas form, but mainly exist in the form of liquid form and gas form, and a small amount of gas can be mixed in the liquid form, and a small amount of liquid can be mixed in the gas form, and are not only completely pure liquid or gas.

[0054] ​​The outdoor unit of the air conditioner further includes an oil separator 122. The oil separator 122 is used to separate and recover the lubricating oil in the exhaust gas of the compressor 120. The compressor 120 needs lubricating oil during operation to reduce friction, reduce noise, and prolong service life. However, the lubricating oil can be discharged by the compressor 120 along with the refrigerant into other parts of the air conditioning system. The oil separator 122 can separate the lubricating oil from the refrigerant and recover it into the compressor 120 to ensure the normal operation of the air conditioning system. The oil separator 122 is arranged on the exhaust gas pipeline of the compressor 120. When the high-temperature and high-pressure gas discharged by the compressor 120 enters the oil separator 122, the oil separator 122 separates the lubricating oil from the refrigerant based on its separation principle (such as centrifugal force, gravity, or other physical methods), and the separated lubricating oil returns to the suction side of the compressor 120 through the oil return pipeline inside the oil separator 122 and the oil return capillary tube 128 to ensure that the compressor 120 has enough lubricating oil to work normally. The refrigerant gas after separating the lubricating oil continues to circulate in the air conditioning system and enters the condenser, the throttling element, and the evaporator, etc.

[0055] The outdoor unit of the air conditioner further includes a four-way valve 124. The four-way valve 124 is used to control the flow direction of the refrigerant to achieve the switching of the heating mode and the cooling mode. The four-way valve 124 is arranged between the exhaust side and the suction side of the compressor 120. The four interfaces of the four-way valve 124 are respectively connected to the exhaust pipeline of the compressor 120, the suction pipeline of the compressor 120, the outdoor heat exchanger, and the indoor heat exchanger 134. In the cooling mode, the high-temperature and high-pressure refrigerant gas discharged by the compressor 120 enters the outdoor heat exchanger through the four-way valve 124; in the heating mode, the high-temperature and high-pressure refrigerant gas discharged by the compressor 120 enters the indoor heat exchanger 134 through the four-way valve 124.

[0056] The outdoor unit of the air conditioner further includes a gas-liquid separator 126. The gas-liquid separator 126 is used to separate the gas and liquid in the refrigerant. The gas-liquid separator 126 is arranged on the suction side of the compressor 120 to prevent liquid refrigerant from entering the compressor 120, thereby protecting the compressor 120 from liquid damage. The gas-liquid separator 126 is based on gravity or centrifugal force. When the refrigerant enters the gas-liquid separator 126, the gas and the liquid will naturally separate due to the difference in density. The gas refrigerant will rise to the upper part of the gas-liquid separator 126 due to its lower density, while the liquid refrigerant will sink to the bottom of the gas-liquid separator 126 due to its higher density. The separated gas refrigerant enters the suction side of the compressor 120 through the upper outlet of the gas-liquid separator 126, and the separated liquid refrigerant is stored in the bottom of the gas-liquid separator 126 and returned to the refrigeration cycle through the oil return pipeline or processed by other means.

[0057] An electrical box is also installed in the outdoor unit of the air conditioner. The electrical box contains a main control board 144, which houses multiple electronic components, including relays, contactors, sensor interfaces, current protection devices, voltage protection devices, a controller, and a power module 142. The controller is the core component of the outdoor unit, responsible for the processing, calculation, and signal transmission of the entire electrical control system. The controller is typically a microcontroller or MCU. Relays and / or contactors are used to switch high-current loads, such as the compressor 120 and the fan, and can control the start and stop of these load devices. The sensor interface receives signals from sensors, such as pressure and temperature sensors, for real-time monitoring and adjustment. Current and voltage protection devices prevent damage to electrical components due to overload, short circuits, etc. The power module 142 primarily converts the inverter's DC power into a pulse-width modulation (PWM) signal. By adjusting the duty cycle of the PWM signal waveform, the required voltage and frequency can be output to adjust the speed and torque of the motor (used to drive the compressor 120 or fan), thereby achieving precise speed regulation.

[0058] In some embodiments of this application, a main control board 144 is provided in the electrical box; in other embodiments of this application, multiple main control boards 144 are provided in the electrical box to adapt to the needs of modular design, distributed system or power distribution.

[0059] Multiple electronic components consume electrical energy when they are working. Due to resistance loss, power consumption, and electromagnetic induction, some of the electrical energy is converted into heat energy, making multiple electronic components heat sources when they are working. The heat they generate accumulates, causing the temperature inside the electrical box to rise, and the entire electrical box becomes an area that generates and releases heat.

[0060] To manage the heat generated by multiple electronic components during operation, a liquid cooling module 104 is installed in the electrical box.

[0061] like Figure 1 As shown, in some embodiments of this application, the liquid cooling module 104 is composed of a first flow channel 106, a second flow channel 108, and a microchannel unit 110.

[0062] In some embodiments of this application, the first flow guide 106 is a round or flat pipe, and the first flow guide 106 is fluidly connected to the liquid-side piping 100.

[0063] In some embodiments of this application, the second flow guide 108 is a round or flat pipe, and the second flow guide 108 is fluidly connected to the gas-side piping 102.

[0064] The refrigerant in the liquid-side piping 100 flows into the liquid-cooled module 104 from the first guide pipe 106, and after passing through the microchannel unit 110, flows out from the second guide pipe 108 to the gas-side piping 102.

[0065] Multiple tiny fluid channels are formed in the microchannel unit 110, increasing the heat-exchangeable surface area. Refrigerant flowing in from the first guide pipe 106 flows through these tiny fluid channels. The microchannels are made of metal or composite materials and possess excellent thermal conductivity. Within the microchannel unit 110, each unit volume of refrigerant flowing through these tiny fluid channels has a large surface area with good thermal conductivity in contact with the heat source, resulting in better heat transfer efficiency as the refrigerant flows through these microchannels. Due to the design of the tiny fluid channels, the refrigerant may flow in a turbulent manner within the microchannels, further enhancing the heat transfer effect. During ultra-high temperature refrigeration or ultra-high temperature hot water production, the power module 142 operates under high load and high power density conditions, generating a high amount of heat. The refrigerant undergoes a phase change within the microchannel unit 110, transforming from a liquid to a gaseous state. This significantly enhances the heat exchange capacity, utilizing latent heat for heat dissipation to meet the ultra-high load heat dissipation requirements.

[0066] like Figure 4 As shown, in some embodiments of this application, the first guide pipe 106 is connected to the liquid-side piping 100 downstream of the condenser.

[0067] In some embodiments of this application, the second guide pipe 108 is connected to the gas-side pipe 102 upstream of the gas-liquid separator 126, so that the refrigerant can pass through the four-way valve 124 and the gas-liquid separator 126, return to the compressor 120, and re-enter the refrigeration cycle.

[0068] In some embodiments of this application, an adjusting element 130 is provided between the liquid-side piping 100 and the first flow guide pipe 106, and the adjusting element 130 is used to adjust the refrigerant flow rate in the liquid cooling module 104.

[0069] In some embodiments of this application, a one-way valve 132 that allows unidirectional flow from the second guide pipe 108 to the gas-side pipe 102 may also be provided between the second guide pipe 108 and the gas-side pipe 102.

[0070] like Figure 6 and Figure 7 As shown, in some embodiments of this application, the microchannel unit 110 further includes a housing 136, which provides mechanical protection for the microfluidic channels, preventing them from being subjected to external physical damage or destruction. The housing 136 is made of a material with good thermal conductivity and structural strength, such as aluminum or copper, and meets the requirements for high and low temperature resistance.

[0071] In some embodiments of the present application, the electrical box further comprises a heat spreading module 138. The heat spreading module 138 is disposed on one side of the liquid cooling module 104.

[0072] In some embodiments of the present application, the heat spreading module 138 is in the form of a substantially planar plate, which is used to spread the local heat to the entire planar area by thermal conduction, so that the heat dissipation effect of the liquid cooling module 104 is more uniform, avoiding overheating in some areas, and overcooling in some areas, reducing temperature gradient. More specifically, the heat spreading module 138 has a heat conduction body 146, which is in the form of a substantially planar plate and has a first heat conduction end face 148 and a second heat conduction end face 150, the first heat conduction end face 148 is in contact with the liquid cooling module 104, and the second heat conduction end face 150 is in contact with the heat source.

[0073] In some embodiments of the present application, the first heat conduction end face 148 can be fixedly connected with the shell 136. The first heat conduction end face 148 corresponds to one side end face of the shell 136, and the area of the first heat conduction end face 148 is substantially the same as that of the one side end face of the shell 136, covering the entire end face of the shell 136 to achieve good heat conduction effect.

[0074] In some embodiments of the present application, the first heat conduction end face 148 can be fixedly connected with the shell 136. The first heat conduction end face 148 corresponds to one side end face of the shell 136, and the area of the first heat conduction end face 148 is substantially the same as that of the one side end face of the shell 136, covering the entire end face of the shell 136 to achieve good heat conduction effect.

[0075] The heat conduction body 146 is made of high-thermal-conductivity material to improve the heat conduction performance of the heat spreading module 138, i.e. materials with high thermal conductivity, including but not limited to metal materials (such as copper, aluminum), and composite materials (such as aluminum-based composite materials and copper-based composite materials), and materials with improved thermal conductivity by adding thermal conductive particles or fibers.

[0076] In some embodiments of the present application, the electrical box further comprises a support module 140. The support module 140 is configured to form a mounting cavity. The electronic components (such as the controller and the power module 142) as the heat source are located in the mounting cavity, and at the same time, the second heat conduction end face 150 of the heat spreading module 138 is also located in the mounting cavity, and the heat source and the second heat conduction end face 150 are in contact in the mounting cavity to guide the uniform distribution of heat, and further uniformly dissipate heat by the liquid cooling module 104.

[0077] In some embodiments of the present application, the liquid cooling module 104 is further provided with a dehumidification fin 154. The dehumidification fin 154 increases the contact area with the air, enhances heat exchange, and effectively removes moisture in the air by condensing water vapor in the air into water droplets and then discharging or evaporating the water droplets through a water collecting groove or the like. In some embodiments of the present application, the dehumidification fin 154 is further provided with a hydrophilic coating for enhancing the condensation and drainage of condensation on the surface of the dehumidification fin 154, so that the condensation is more effectively condensed on the surface of the dehumidification fin 154 and guided to a designated position, reducing the problem of water accumulation and prolonging the service life of the equipment.

[0078] As shown in FIG. 1, Figures 8 to 10 In some embodiments of the present application, the electrical appliance box includes an outer shell. The liquid cooling module 104 is installed in the outer shell. The outer shell is further provided with a heat dissipation fan 156 for accelerating air flow by forced convection, thereby improving the heat dissipation speed.

[0079] In some embodiments of the present application, the outer shell is further provided with a heat dissipation air duct. The heat dissipation fan 156 is arranged in the heat dissipation air duct. The heat dissipation air duct is used to guide the air flow and ensure that the air driven by the heat dissipation fan 156 can flow through the liquid cooling module 104, thereby improving the heat dissipation efficiency. At the same time, the arrangement of the heat dissipation fan 156 in the heat dissipation air duct can further enhance the directional flow of air, reduce turbulence, and improve the heat dissipation efficiency in a limited space for high-power or high-density scenarios.

[0080] In some embodiments of the present application, the outer shell adopts a modular design and is formed by splicing a plurality of plate-shaped components. The plate-shaped components can be fixed by screws / bolts, buckles, or the like. Alternatively, the plate-shaped components can be fixed by welding or riveting.

[0081] In some embodiments of the present application, the outer shell includes a first shell body 160 and a second shell body 164. From the installation direction of the electrical appliance box, the first shell body 160 is arranged at a relatively inner position, and the second shell body 164 is arranged at a relatively outer position. The heat dissipation fan 156 is arranged on the first shell body 160, and the liquid cooling module 104 is arranged on the second shell body 164. The first shell body 160 and the second shell body 164 are detachably fixed and connected. The first shell body 160 and the second shell body 164 both serve as load-bearing components and are generally plate-shaped. The first shell body 160 and the second shell body 164 have substantially the same area. The first shell body 160 and the second shell body 164 are arranged in correspondence with and spaced apart from each other. The end portions of the first shell body 160 and the second shell body 164 are fixed and connected by an end plate 152. The first shell body 160 and the end plate 152 can be fixed and connected by screws / bolts or buckles or the like. The second shell body 164 and the end plate 152 can also be fixed and connected by screws / bolts or buckles or the like.

[0082] In some embodiments of the present application, the heat dissipation air duct includes an air inlet and an air outlet 162. The air inlet is formed on the first shell 160, and the heat dissipation fan 156 is located at the air inlet. The air outlet 162 is also formed on the first shell 160 and is located at the other end of the first shell 160 in the length direction. The air duct volute 158 is arranged on the second shell 164, and the liquid cooling module 104 is arranged in the air duct volute 158. The heat dissipation fan 156 guides air to enter from the air inlet, pass through the air duct volute 158, and flow out from the air outlet 162.

[0083] The air flow between the first shell 160 and the second shell 164 is realized by the heat dissipation air duct, and the internal and external layers circulate heat dissipation.

[0084] According to actual needs, other plate-shaped components can also be used to form a sealed shell or a semi-sealed shell for the shell of the electrical appliance box.

[0085] In some embodiments of the present application, a first temperature sensor is arranged on the first shell 160.

[0086] In some embodiments of the present application, a second temperature sensor is arranged in the power module 142.

[0087] The air conditioner outdoor unit can perform anti-condensation control based on the detection values of the first temperature sensor and the second temperature sensor. For example, when the detection value of the first temperature sensor is lower than the detection value of the second temperature sensor, and the temperature difference meets a preset condition, it is considered that there is a risk of condensation in the power module 142, and the controller drives the adjusting element 130 (usually an electromagnetic valve or an electronic expansion valve) to close the valve, reduces the refrigerant flow in the liquid cooling module 104, and reduces the risk of condensation.

[0088] In the high-load mode of super-high-temperature refrigeration or super-high-temperature heating water, the air conditioning system will have a large pressure difference. Especially in the starting stage, the starting current of the power module 142 will instantaneously increase, at this time the refrigerant is relatively stationary, the temperature of the heat source will rapidly increase, and there is a risk of causing serious damage or failure of the main control board 144, commonly known as "board explosion". Figure 5 As shown in FIG. 8, when the machine is stopped, the adjusting element 130 is configured to be closed, and the liquid cooling module 104 can be kept in a relatively high pressure state. When the air conditioning system starts, the adjusting element 130 is opened, and the refrigerant in the liquid cooling module 104 undergoes a phase change to provide a starting stage heat dissipation function for the power module 142.

[0089] In some embodiments of the present application, the adjusting element 130 can be opened before the power module 142 starts to work.

[0090] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0091] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An air conditioner outdoor unit, comprising: a liquid side pipe in which a refrigerant flows in a liquid form; a gas side pipe in which a refrigerant flows in a gas form; an electrical box in which a plurality of electronic components are disposed, the plurality of electronic components generating heat when in operation; characterized in that: the electrical box comprises: a liquid cooling module comprising: a first flow guide pipe configured to be fluidly connected to the liquid side pipe; a second flow guide pipe configured to be fluidly connected to the gas side pipe; and a micro-channel unit configured to be fluidly connected to the first flow guide pipe and the second flow guide pipe; the refrigerant in the liquid side pipe flows from the first flow guide pipe into the liquid cooling module, passes through the micro-channel unit, and then flows from the second flow guide pipe to the gas side pipe. 2.The air conditioner outdoor unit according to claim 1, further comprising: a regulating element disposed between the first flow guide pipe and the liquid side pipe, the regulating element being configured to regulate the flow of the refrigerant in the liquid cooling module, the regulating element being in a closed state when the air conditioner outdoor unit is turned off. 3.The air conditioner outdoor unit according to claim 1, wherein the electrical box further comprises: a heat equalizing module disposed on one side of the liquid cooling module, the heat equalizing module comprising: a heat conducting main body having: a first heat conducting end surface in contact with the liquid cooling module; and a second heat conducting end surface in contact with the heat source. 4.The air conditioner outdoor unit according to claim 3, wherein the heat conducting main body is made of a heat conductive material. 5.The air conditioner outdoor unit according to claim 3, wherein the electrical box further comprises: a support module configured to form at least one mounting cavity, the heat source and the second heat conducting end surface being located in the mounting cavity, the heat source and the second heat conducting end surface being in contact in the mounting cavity. 6.The air conditioner outdoor unit according to claim 1, wherein the liquid cooling module is further provided with a dehumidifying fin. 7.The air conditioner outdoor unit according to any one of claims 1 to 6, wherein the electrical box comprises: a housing in which the liquid cooling module is mounted; and a heat dissipation fan disposed in the housing. 8.The air conditioner outdoor unit according to claim 7, wherein the housing is further provided with a heat dissipation air duct, and the heat dissipation fan is disposed in the heat dissipation air duct. 9.The air conditioner outdoor unit according to claim 8, wherein the housing comprises: a first housing in which the heat dissipation fan is disposed; and a second housing in which the liquid cooling module is disposed; the first housing and the second housing are detachably fixedly connected; and the heat dissipation air duct comprises: an air inlet opening formed in the first housing, the heat dissipation fan being located at the air inlet opening; an air outlet opening formed in the first housing; an air duct volute disposed on the second housing, the liquid cooling module being disposed in the air duct volute. ​ ​ ​ ​ ​ ​ ​ ​ The heat dissipation fan guides air to enter from the air inlet, pass through the air duct volute, and flow out from the air return.

10. The outdoor unit of claim 9, wherein, The first housing is provided with a first temperature sensor; The electronic component includes: A power module is provided with a second temperature sensor.

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