Air conditioner outdoor unit

Abstract

The utility model discloses an outdoor unit of an air conditioner, which comprises an electric appliance box, a driving unit, a control unit and a power supply unit, the fan driving module is used for driving an outdoor fan to operate; the heat dissipation unit comprises a refrigerant heat dissipation element which is arranged on one side of the driving unit; a refrigerant flows in the refrigerant heat dissipation element, and the refrigerant heat dissipation element is used for dissipating heat for the compressor driving module; and the driving heat dissipation element is arranged between the driving unit and the refrigerant heat dissipation element, and the driving heat dissipation element is used for dissipating heat for the compressor driving module and the fan driving module. According to the application, the condensation risk can be reduced while the heat dissipation requirement is met, and the balance between heat dissipation and condensation prevention is achieved.

Description

TECHNICAL FIELD

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

[0002] Compressor drive module is the electronic module responsible for controlling and driving compressor in air conditioning system, for converting input power into the voltage and current required by compressor, adjusting the speed of compressor, monitoring the operating state of compressor, ensuring the safe operation of compressor;And fan drive module is the electronic module responsible for controlling and driving outdoor fan, for converting input power into the voltage and current required by outdoor fan, adjusting the speed of fan, monitoring the operating state of outdoor fan, ensuring the safe operation of outdoor fan.The core components of compressor drive module and fan drive module are power semiconductor components, when driving motor, power semiconductor components will generate a large amount of heat due to power loss and high-frequency switching.

[0003] In order to ensure the normal work of compressor drive module and fan drive module, usually adopt fin, air-cooled heat dissipation, water-cooled heat dissipation, heat pipe heat dissipation and other ways, effectively reduce the temperature of power semiconductor components, ensure the normal and stable operation of compressor drive module and fan drive module.But, the heat dissipation temperature of these heat dissipation means is not easy to control, especially in the electrical box, due to the different heat output of compressor drive module and fan drive module, uneven cooling effect is easy to appear;In addition, the heat conduction of components of different materials is also uneven, in the electrical box, some areas are prone to low temperature, even in the dew point temperature of surrounding air.In this case, water vapor in the air will condense into water droplets in low temperature area, forming condensation.Condensation may cause electrical components in electrical box short circuit, or metal components corrosion, accelerate aging, affect system corrosion.

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

[0005] To balance the heat dissipation and anti-condensation demand, the present application designs and provides a kind of air conditioner outdoor unit.

[0006] In some embodiments of the present application, an air conditioner outdoor unit comprises: an electrical box comprising: a driving unit comprising: a compressor driving module for driving the operation of a compressor; and a fan driving module for driving the operation of an outdoor fan; and further comprising: a heat dissipation unit comprising: a refrigerant heat dissipation element arranged on one side of the driving unit; a refrigerant flows in the refrigerant heat dissipation element, and the refrigerant heat dissipation element is used for dissipating heat for the compressor driving module; and a driving heat dissipation element arranged between the driving unit and the refrigerant heat dissipation element, and the driving heat dissipation element is used for dissipating heat for the compressor driving module and the fan driving module.

[0007] The above technical solution has the following advantages or beneficial effects: on the one hand, the refrigerant flow and temperature in the refrigerant heat dissipation element can be adjusted, and through the combination of the refrigerant heat dissipation element and the driving heat dissipation element, the heat dissipation of the compressor driving module with relatively large power and high heat generation can be realized, and different workloads can be more flexibly coped with; and the driving heat dissipation element can effectively conduct the heat generated by the fan driving module to the outside, and rapid heat dissipation can also be realized; on the other hand, since the heat generation of the fan driving module is relatively small, the use of the driving heat dissipation element alone can avoid excessive cooling, thereby reducing the risk of condensation, the temperature control of the driving heat dissipation element is relatively stable, and local overcooling is also less likely to occur; and the combination of the refrigerant heat dissipation element and the driving heat dissipation element for dissipating heat for the compressor driving module can adjust the refrigerant flow and temperature in the refrigerant heat dissipation element, and can also avoid local overcooling and reduce the risk of condensation, thereby achieving a balance between heat dissipation and condensation prevention.

[0008] In some embodiments of the present application, the refrigerant heat dissipation element comprises: a first heat dissipation part corresponding to the compressor driving module, and a first heat dissipation surface is formed on the side of the first heat dissipation part away from the compressor driving module.

[0009] The above technical solution has the following advantages or beneficial effects: the side of the refrigerant heat dissipation element corresponding to the compressor driving module adopts a finless design, thereby reducing heat dissipation on the side of the first heat dissipation surface and reducing the risk of condensation.

[0010] In some embodiments of the present application, the refrigerant heat dissipation element comprises: a second heat dissipation part arranged continuously with the first heat dissipation part, the second heat dissipation part corresponds to the fan driving module, and heat dissipation fins are arranged on the side of the second heat dissipation part away from the fan driving module.

[0011] The above technical solution has the following advantages or beneficial effects: the heat dissipation fins increase the heat exchange area between the refrigerant heat dissipation element and the air in the electrical box, thereby helping to reduce the internal temperature of the electrical box.

[0012] In some embodiments of the present application, the second heat dissipation part is arranged spaced apart from the driving heat dissipation element, and a gap allowing air flow is formed between the second heat dissipation part and the driving heat dissipation element.

[0013] The above technical solution has the following advantages or beneficial effects: the heat transfer between the refrigerant heat dissipation element and the driving heat dissipation element is reduced through the gap, the temperature of the position of the fan driving module corresponding to the driving heat dissipation element is prevented from being too low, and condensation is prevented from occurring near the fan driving module.

[0014] In some embodiments of the present application, the refrigerant heat dissipation element comprises: a main heat dissipation part, a heat dissipation pipeline is arranged in the main heat dissipation part, and the refrigerant flows in the heat dissipation pipeline; and an edge part, which is formed on one side of the refrigerant heat dissipation element, and the thickness of the edge part is lower than the thickness of the main heat dissipation part.

[0015] The above technical solution has the following advantages or beneficial effects: the design of the edge part can limit the heat exchange area of the main heat dissipation part, on the one hand, and reduce the risk of over-cooling condensation while ensuring that the heat dissipation requirement is met; on the other hand, the edge part can be used for the assembly of the electrical box.

[0016] In some embodiments of the present application, the heat dissipation pipeline is connected to a heat dissipation branch, the heat dissipation branch is connected to a refrigerant circuit, the heat dissipation branch extends into the main heat dissipation part to connect the heat dissipation pipeline, and the refrigerant circuit circulates the refrigerant in the compressor, the condenser, the throttling element and the evaporator.

[0017] The above technical solution has the following advantages or beneficial effects: placing the connection end of the heat dissipation pipeline and the heat dissipation branch in the shell can avoid the joints being exposed to the air and the risk of condensation; on the other hand, placing the joints in the shell can further reduce the space occupied by the heat dissipation unit in the electrical box, making the design of the electrical box more compact.

[0018] In some embodiments of the present application, the inlet of the heat dissipation branch is located between the condenser and the evaporator.

[0019] The above technical solution has the following advantages or beneficial effects: the refrigerant in the refrigeration cycle is used to cool the electrical box, and no additional cold source is needed, thereby simplifying the system structure.

[0020] In some embodiments of the present application, an air conditioner outdoor unit comprises: an electrical box comprising: a first driving unit comprising: a first compressor driving module for driving the operation of a first compressor; and a first fan driving module for driving the operation of a first outdoor fan; a second driving unit comprising: a second compressor driving module for driving the operation of a second compressor; and a second fan driving module for driving the operation of a second outdoor fan; further comprising: a first heat dissipation unit comprising: a first refrigerant heat dissipation element arranged on one side of the first driving unit; a refrigerant flowing in the first refrigerant heat dissipation element, the first refrigerant heat dissipation element being used for dissipating heat for the first compressor driving module; a first driving heat dissipation element arranged between the first driving unit and the first refrigerant heat dissipation element, the first driving heat dissipation element being used for dissipating heat for the first compressor driving module and the first fan driving module; a second heat dissipation unit comprising: a second refrigerant heat dissipation element arranged on one side of the second driving unit; a refrigerant flowing in the second refrigerant heat dissipation element, the refrigerant heat dissipation element being used for dissipating heat for the second compressor driving module; a second driving heat dissipation element arranged between the second driving unit and the second refrigerant heat dissipation element, the second driving heat dissipation element being used for dissipating heat for the second compressor driving module and the second fan driving module; the air conditioner outdoor unit further comprises an adjusting assembly for adjusting the refrigerant flow in the first refrigerant heat dissipation element and the second refrigerant heat dissipation element.

[0021] The above technical solution has the following advantages or beneficial effects: through the adjusting assembly, the refrigerant flow in the first refrigerant heat dissipation element and the second refrigerant heat dissipation element can be adjusted, so that the refrigerant in the refrigerant cycle can be used for heat dissipation according to the temperature of the refrigerant in the double-compressor, double-outdoor-fan, three-pipe or four-pipe air conditioning system, thereby effectively avoiding local supercooling caused by working condition changes and reducing the risk of condensation in the electrical box.

[0022] In some embodiments of the present application, the first refrigerant heat dissipation element comprises: a first main heat dissipation part in which a first heat dissipation pipeline is arranged, and a refrigerant flows in the first heat dissipation pipeline; the second refrigerant heat dissipation element comprises: a second main heat dissipation part in which a second heat dissipation pipeline is arranged, and a refrigerant flows in the second heat dissipation pipeline; the first heat dissipation pipeline and the second heat dissipation pipeline are distributed side by side, and the pipe openings of the first heat dissipation pipeline and the second heat dissipation pipeline are arranged in the same direction.

[0023] The above technical solution has the following advantages or beneficial effects: the pipe openings of the first heat dissipation pipeline and the second heat dissipation pipeline are arranged in the same direction, which can be installed from the side or from top to bottom, so that the first heat dissipation pipeline and the second heat dissipation pipeline extend out of the opening formed in the lower end of the shell.

[0024] In some embodiments of the present application, the first refrigerant heat dissipation element comprises a first main heat dissipation part in which a first heat dissipation pipeline is arranged, and the refrigerant flows in the first heat dissipation pipeline; the second refrigerant heat dissipation element comprises a second main heat dissipation part in which a second heat dissipation pipeline is arranged, and the refrigerant flows in the second heat dissipation pipeline; the first heat dissipation pipeline and the second heat dissipation pipeline are arranged side by side, and the pipe openings of the first heat dissipation pipeline and the second heat dissipation pipeline are arranged oppositely.

[0025] The above technical solution has the following advantages or beneficial effects: the pipe openings of the first heat dissipation pipeline and the second heat dissipation pipeline are arranged oppositely, so that the first heat dissipation pipeline and the second heat dissipation pipeline can also extend out of the opening arranged at the lower end of the shell from top to bottom.

[0026] Other characteristics and advantages of the present application will become more apparent after reading the detailed description of the specific embodiments 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 as follows. 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 under the premise of the drawings.

[0028] Figure 1 Part of the structure schematic diagram of the electric control box in the outdoor unit of the air conditioner provided by some embodiments of the present application is shown in the following figure.

[0029] Figure 2 Part of the structure schematic diagram of the electric control box in the outdoor unit of the air conditioner provided by some embodiments of the present application is shown in the following figure.

[0030] Figure 3 Part of the structure schematic diagram of the electric control box in the outdoor unit of the air conditioner provided by some embodiments of the present application is shown in the following figure.

[0031] Figure 4 Part of the structure schematic diagram of the electric control box in the outdoor unit of the air conditioner provided by some embodiments of the present application is shown in the following figure.

[0032] Figure 5 Part of the structure schematic diagram of the electric control box in the outdoor unit of the air conditioner provided by some embodiments of the present application is shown in the following figure.

[0033] Figure 6 Part of the structure schematic diagram of the electric control box in the outdoor unit of the air conditioner provided by some embodiments of the present application is shown in the following figure. Figure 5 Part of the structure schematic diagram of the electric control box in the outdoor unit of the air conditioner provided by some embodiments of the present application is shown in the following figure.

[0034] Figure 7 Part of the structure schematic diagram of the electric control box in the outdoor unit of the air conditioner provided by some embodiments of the present application is shown in the following figure.

[0035] Figure 8 Part structure schematic view of electric control box in outdoor unit of air conditioner provided by some embodiments of the utility model;

[0036] Figure 9 Structure schematic view of heat dissipation branch in outdoor unit of air conditioner provided by some embodiments of the utility model;

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

[0038] Figure 11 Part structure schematic view of electric control box in outdoor unit of air conditioner provided by some embodiments of the utility model;

[0039] In the figure: 100, electric appliance box;102, shell;104, main control board;106, drive unit;108, compressor drive module;110, fan drive module;112, refrigerant heat dissipation element;114, drive heat dissipation element;116, first heat dissipation part;118, first heat dissipation surface;120, heat dissipation fin;122, gap;124, second heat dissipation part;126, main heat dissipation part;128, edge part;130, half hole;132, protective shell;134, heat dissipation branch;136, first heat dissipation unit;138, second heat dissipation unit;142, first refrigerant heat dissipation element;144, second refrigerant heat dissipation element;146, adjusting assembly;148, first electromagnetic valve;150, second electromagnetic valve;152, opening. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "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 convenience of describing 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, therefore it cannot be understood as a limitation to the present application.

[0042] The terms "first", "second", etc. are used to describe various components only and do not imply or suggest relative importance or a specific number of the technical features indicated. Thus, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0043] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside 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.

[0044] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and oblique upper of the first feature to the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "lower", "lower" and "lower" of the first feature to the second feature include the vertical and oblique lower of the first feature to the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0045] 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 settings of specific examples are described below. 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 settings discussed. In addition, the present application provides various specific examples of processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0046] The following refers to the accompanying drawings Figures 1 to 11 The embodiments of the air conditioner outdoor unit provided by the present application are described.

[0047] The air conditioner outdoor unit is a component of the air conditioning system.

[0048] An 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 to refrigerate or heat an indoor space. The refrigerant circulates through a refrigerant circuit that circulates the refrigerant in the compressor, the condenser, the throttling element, and the evaporator.

[0049] 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.

[0050] The throttling element (for example, an electronic expansion valve) expands the high-temperature and high-pressure state liquid phase refrigerant condensed in the condenser into a 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 the latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioning system can adjust the temperature of the indoor space.

[0051] The air conditioning outdoor unit refers to the part 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 outdoor unit and / or the indoor unit.

[0052] The indoor heat exchanger and the outdoor heat exchanger are used as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioning system is used as a heater in a heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioning system is used as a cooler in a cooling mode.

[0053] The air conditioning outdoor unit also includes an outdoor fan for discharging heat or cold to the outdoor environment. In the cooling mode, the outdoor fan drives air to flow through the condenser so that the refrigerant in the condenser exchanges heat with the air; in the heating mode, the outdoor fan drives air to flow through the evaporator so that the refrigerant in the evaporator exchanges heat with the air. The outdoor fan includes a motor and fan blades, the motor drives the fan blades to rotate, and the fan blades are axial flow fans or centrifugal fans for guiding air flow.

[0054] An electrical box 100 (also referred to as an electrical control box) is further provided in the outdoor unit of the air conditioner, and various electronic components and electrical components are centrally arranged in the electrical box 100. For example, the electrical box 100 is provided with a main control board 104, a relay, a contactor, a sensor interface, a current protection device, a voltage protection device, and the like. The main control board 104 is the core part of the electrical box 100 of the outdoor unit of the air conditioner, and is responsible for processing, calculation and signal transmission of the entire electrical control system. The main control board 104 is integrated with a processor. The relay and / or the contactor are used to switch a large current load, such as a compressor and an outdoor fan, and the relay and / or the contactor can control the start and stop of these load devices. The sensor interface is used to receive signals from sensors, such as pressure sensors and temperature sensors, for real-time monitoring and adjustment. The current protection device and the voltage protection device are used to prevent electrical components from being damaged due to overload, short circuit and the like.

[0055] The shell 102 of the electrical box 100 can be made of metal or engineering plastic, and has good waterproof and dustproof performance to cope with the relatively harsh outdoor working environment.

[0056] The electrical box 100 is provided with a driving unit 106, and the driving unit 106 is arranged on the main control board 104.

[0057] In some embodiments of the present application, the driving unit 106 includes a compressor driving module 108. The compressor driving module 108 is used to drive the operation of the compressor. More specifically, the compressor driving module 108 refers to an electronic module used to drive and control the operation of the compressor. From the principle point of view, the compressor driving module 108 converts alternating current into direct current through rectification and filtering; then further utilizes power semiconductor components (such as IGBT or MOSFET) to adjust the direct current into a pulse width modulation signal (PWM) through inversion; by adjusting the duty cycle of the PWM waveform, the required voltage and frequency are output, and the speed and torque of the compressor motor are adjusted, so as to realize the precise adjustment of the compressor. In the compressor driving module 108, multiple subsystems such as overload protection and fault diagnosis can also be included to improve the control efficiency and have better energy saving performance.

[0058] In some embodiments of the present application, the driving unit 106 further includes a fan driving module 110. The fan driving module 110 is used to drive the operation of the outdoor fan. More specifically, the fan driving module 110 refers to an electronic module used to drive and control the operation of the outdoor fan, which is responsible for controlling the start and stop and speed regulation of the outdoor fan motor. Compared with the compressor driving module 108, the load of the outdoor fan changes relatively smoothly, and the fan driving module 110 is mainly used to adjust the speed according to the air volume demand.

[0059] In some embodiments of the present application, the driving unit 106 further includes other available driving circuits.

[0060] The power semiconductor components in the drive units 106, such as the compressor drive module 108 and the fan drive module 110, generate heat during operation, which causes the electronic components to work in a high-temperature environment. The high-temperature environment can easily cause the electronic components to malfunction and accelerate the aging of materials such as solder joints, insulating materials, wires, and chips, resulting in performance degradation or complete failure. However, the temperature difference caused by heat dissipation can cause water vapor to condense on the low-temperature surface, causing the electronic components to be damaged or have reduced performance. Therefore, it is necessary to design a reasonable heat dissipation system for the electrical box 100 to balance the needs of heat dissipation and anti-condensation, while ensuring that the generated heat can be effectively dissipated to the environment and reducing the possibility of condensation.

[0061] In some embodiments of the present application, the heat dissipation system includes a heat dissipation unit. The heat dissipation unit includes a refrigerant heat dissipation element 112 and a drive heat dissipation element 114.

[0062] In some embodiments of the present application, the refrigerant heat dissipation element 112 is arranged on one side of the drive unit 106. The refrigerant flows in the refrigerant heat dissipation element 112, and the refrigerant heat dissipation element 112 is used to dissipate heat for the compressor drive module 108.

[0063] Corresponding to the main control board 104 in a substantially flat design, the refrigerant heat dissipation element 112 is in a substantially flat shape, which is arranged on one side of the drive unit 106 to ensure ideal heat dissipation efficiency. The refrigerant flows in the refrigerant heat dissipation element 112, and the refrigerant has good thermal conductivity and can effectively absorb and conduct heat. When the refrigerant flows in the refrigerant heat dissipation element 112, it will flow near the compressor drive module 108, and the refrigerant will absorb the heat generated by the compressor drive module 108, thereby reducing the temperature of the compressor drive module 108.

[0064] In some embodiments of the present application, the drive heat dissipation element 114 is arranged between the drive unit 106 and the refrigerant heat dissipation element 112. The drive heat dissipation element 114 is used to dissipate heat for the compressor drive module 108 and the fan drive module 110.

[0065] Corresponding to the main control board 104 in a substantially flat design, the drive heat dissipation element 114 is in a substantially flat shape, and the thickness of the drive heat dissipation element 114 is less than the thickness of the refrigerant heat dissipation element 112. In some embodiments of the present application, the drive heat dissipation element 114 can be a liquid cooling plate, which uses liquid (water or water-based solution) as a heat exchange medium to transfer the heat generated by the compressor drive module 108 and the fan drive module 110 to the outside, thereby effectively reducing the operating temperature of the equipment.

[0066] On the one hand, the refrigerant flow and temperature in the refrigerant heat dissipation element 112 can be adjusted, and through the combination of the refrigerant heat dissipation element 112 and the driving heat dissipation element 114, the heat dissipation of the compressor driving module 108 with large power and high heat generation can be realized, and different working loads can be more flexibly coped with; the driving heat dissipation element 114 can effectively conduct the heat generated by the fan driving module 110 to the outside, and also can realize rapid heat dissipation; on the other hand, since the heat generation of the fan driving module 110 is relatively small, the driving heat dissipation element 114 can be used alone to avoid excessive cooling, thereby reducing the risk of condensation, the temperature control of the driving heat dissipation element 114 is relatively stable, and local overcooling is not easy to occur; and the combination of the refrigerant heat dissipation element 112 and the driving heat dissipation element 114 for the compressor driving module 108, the refrigerant flow and temperature in the refrigerant heat dissipation element 112 can be adjusted, and local overcooling can also be avoided, thereby reducing the risk of condensation, so as to balance between heat dissipation and condensation prevention.

[0067] In some embodiments of the present application, the refrigerant heat dissipation element 112 includes a first heat dissipation part 116. The first heat dissipation part 116 is arranged corresponding to the compressor driving module 108. The side of the first heat dissipation part 116 away from the compressor driving module 108 is formed with a first heat dissipation surface 118. In some embodiments of the present application, the first heat dissipation surface 118 is a smooth plane. That is, the side of the refrigerant heat dissipation element 112 corresponding to the compressor driving module 108 adopts a finless design, thereby reducing the heat dissipation on the side of the first heat dissipation surface 118 and reducing the risk of condensation.

[0068] In some embodiments of the present application, the refrigerant heat dissipation element 112 includes a second heat dissipation part 124. The first heat dissipation part 116 and the second heat dissipation part 124 are arranged continuously. The second heat dissipation part 124 corresponds to the fan driving module 110. The side of the second heat dissipation part 124 away from the fan driving module 110 is provided with a heat dissipation fin 120. The heat dissipation fin 120 is used for heat dissipation inside the electrical appliance box 100, and the heat dissipation fin 120 increases the heat exchange area between the refrigerant heat dissipation element 112 and the air of the electrical appliance box 100, and helps to reduce the internal temperature of the electrical appliance box 100.

[0069] In some embodiments of the present application, the refrigerant heat dissipation element 112 corresponds to the second heat dissipation part 124 provided by the fan driving module 110, and the driving heat dissipation element 114 is arranged in a spaced manner. An air flow gap 122 is formed between the second heat dissipation part 124 and the driving heat dissipation element 114, which reduces the heat transfer between the refrigerant heat dissipation element 112 and the driving heat dissipation element 114, avoids the temperature of the driving heat dissipation element 114 corresponding to the position of the fan driving module 110 being too low, and avoids the occurrence of condensation near the fan driving module 110. According to the specific operation of the fan, when the heat generation of the fan driving module 110 is much lower than that of the compressor driving module 108, the gap 122 between the second heat dissipation part 124 and the driving heat dissipation element 114 can also be filled with thermal insulation material; when the heat generation of the fan driving module 110 is relatively high, similar to that of the compressor driving module 108, the gap 122 between the second heat dissipation part 124 and the driving heat dissipation element 114 can also be filled with thermal conductive material. The provision of the gap 122 provides relative flexibility, so that the heat dissipation unit can be configured according to specific conditions.

[0070] In some embodiments of the present application, the refrigerant heat dissipation element 112 includes a main heat dissipation part 126 and an edge part 128. The main heat dissipation part 126 is provided with a heat dissipation pipeline. The refrigerant flows in the heat dissipation pipeline, and the edge part 128 is formed on one side of the refrigerant heat dissipation element 112, and the thickness of the edge part 128 is lower than that of the main heat dissipation part 126. The design of the edge part 128 can limit the heat exchange area of the main heat dissipation part 126 on the one hand, and on the other hand, the edge part 128 can be used for the assembly of the electrical appliance box 100, for example, a through hole or a half-through hole 130 can be designed on the edge part 128 to be detachably assembled.

[0071] In some embodiments of the present application, the refrigerant heat dissipation element 112 has a protective shell 132 made of a thermal conductive material (such as metal), and the heat dissipation pipeline adopts a U-shaped design. On the one hand, the heat dissipation pipeline is arranged in the protective shell 132 to provide sufficient contact area in the length direction of the protective shell 132 and improve the heat exchange efficiency; on the other hand, the refrigerant can be more uniformly distributed in the U-shaped heat dissipation pipeline, avoiding local overheating or overcooling, thereby achieving more uniform heat dissipation effect, and also avoiding local overcooling.

[0072] In some embodiments of the present application, the heat dissipation pipeline is connected to the heat dissipation branch 134. The heat dissipation branch 134 is connected to the refrigerant circuit, and the heat dissipation branch 134 extends into the main heat dissipation part 126, for example, extends into the protective shell 132 of the main heat dissipation part 126, to connect the heat dissipation pipeline. By placing the connection end of the heat dissipation pipeline and the heat dissipation branch 134 in the housing 102, the risk of condensation can be avoided because the joint is not exposed to the air. On the other hand, by placing the joint in the housing 102, the space occupied by the heat dissipation unit in the electrical box 100 can be further reduced, making the design of the electrical box 100 more compact.

[0073] In some embodiments of the present application, the refrigerant in the heat dissipation branch 134 comes from between the condenser and the evaporator, that is, the refrigerant in the refrigeration cycle is used to cool the electrical box 100, without the need for an additional cold source, thereby simplifying the system structure.

[0074] In some embodiments of the present application, the heat dissipation unit is suitable for a multi-pipe large central air conditioner with double compressors and double outdoor fans. The multi-pipe large central air conditioner with double compressors and double outdoor fans is used for centralized air conditioning adjustment of multiple areas or multiple rooms, and is applied to scenes such as commercial buildings, industrial facilities, and office facilities.

[0075] Specifically, some embodiments of the present application provide an air conditioner outdoor unit.

[0076] The air conditioner outdoor unit includes a first compressor and a second compressor, and the first compressor and the second compressor are independently controlled. The first compressor and the second compressor can work cooperatively to provide sufficient refrigeration or heating capacity during a load peak, or to adjust power according to the needs of the system; in the case of low load, the first compressor or the second compressor works to improve energy consumption.

[0077] The air conditioner outdoor unit also includes a first outdoor fan and a second outdoor fan, and the first outdoor fan and the second outdoor fan are independently controlled. The first outdoor fan and the second outdoor fan can work independently to guide air to exchange heat with outdoor heat exchangers of different sections, achieving good heat exchange effect, and also meeting the requirements of special working conditions such as defrosting.

[0078] The three-pipe air conditioning system can simultaneously control cold / heat load according to indoor load demand, and the four-pipe air conditioning system can achieve more flexible temperature control management on the basis of simultaneously providing refrigeration and heating modes.

[0079] In the multi-pipe large central air conditioner with double compressors and double outdoor fans, the working modes of the compressor driving module 108 and the fan driving module are more flexible, and the heat generated is more variable. Specifically, the electrical box 100 includes a first driving unit 106 and a second driving unit 106. The first driving unit 106 includes a first compressor driving module 108 and a first fan driving module 110, the first compressor driving module 108 is used to drive the operation of the first compressor, and the first fan driving module 110 is used to drive the operation of the first outdoor fan; the second driving unit 106 includes a second compressor driving module 108 and a second fan driving module 110, the second compressor driving module 108 is used to drive the operation of the second compressor, and the second fan driving module 110 is used to drive the operation of the second outdoor fan.

[0080] The principles of the compressor driving module 108 and the fan driving module 110 are described in detail in the above embodiments, which will not be repeated here.

[0081] In some embodiments of the present application, the air conditioner outdoor unit further includes a first heat dissipation unit 136 and a second heat dissipation unit 138.

[0082] The first heat dissipation unit 136 includes a first refrigerant heat dissipation element 142. The first refrigerant heat dissipation element 142 is arranged on one side of the first driving unit 106, the refrigerant flows in the first refrigerant heat dissipation element 142, and the first refrigerant heat dissipation element 142 is used to dissipate heat for the first compressor driving module 108. The first refrigerant heat dissipation element 142 is a liquid cooling module.

[0083] The first driving heat dissipation element 114 is arranged between the first driving unit 106 and the first refrigerant heat dissipation element 142. The first driving heat dissipation element 114 is used to dissipate heat for the first compressor driving module 108 and the first fan driving module 110.

[0084] The second heat dissipation unit 138 includes a second refrigerant heat dissipation element 144. The second refrigerant heat dissipation element 144 is arranged on one side of the second driving unit 106, the refrigerant flows in the second refrigerant heat dissipation element 144, and the second refrigerant heat dissipation element 144 is used to dissipate heat for the second compressor driving module 108. The second refrigerant heat dissipation element 144 is a liquid cooling module.

[0085] The second driving heat dissipation element 114 is arranged between the second driving unit 106 and the second refrigerant heat dissipation element 144. The second driving heat dissipation element 114 is used to dissipate heat for the second compressor driving module 108 and the second fan driving module 110.

[0086] An adjusting assembly 146 is further arranged in the air conditioner outdoor unit, and the adjusting assembly 146 is used to adjust the refrigerant flow in the first refrigerant heat dissipation element 142 and the second refrigerant heat dissipation element 144.

[0087] In some embodiments of the present application, the regulating assembly 146 comprises a first electromagnetic valve 148 and a second electromagnetic valve 150.

[0088] In some embodiments of the present application, the regulating assembly 146 comprises a first electronic expansion valve and a second electronic expansion valve.

[0089] In some embodiments of the present application, the regulating assembly 146 further comprises a combination of the electromagnetic valve and the electronic expansion valve.

[0090] Through the regulating assembly 146, the refrigerant flow in the first refrigerant heat dissipation element 142 and the second refrigerant heat dissipation element 144 can be regulated, so that the refrigerant in the refrigerant cycle can be used for heat dissipation according to the temperature of the refrigerant in the double-compressor, double-outdoor-fan, three-pipe or four-pipe air conditioning system, so as to effectively avoid local supercooling caused by working condition changes and reduce the risk of condensation in the electrical box 100.

[0091] The first refrigerant heat dissipation element 142 and the first drive heat dissipation element 114 can adopt the structural design provided in the above-mentioned embodiments, which will not be described here again.

[0092] The second refrigerant heat dissipation element 144 and the second drive heat dissipation element 114 can also adopt the structural design provided in the above-mentioned embodiments, which will not be described here again.

[0093] In some embodiments of the present application, the first refrigerant heat dissipation element 142 comprises a first main heat dissipation part 126. The first main heat dissipation part 126 is provided with a first heat dissipation pipeline, and the refrigerant flows in the first heat dissipation pipeline; the second refrigerant heat dissipation element 144 comprises a second main heat dissipation part 126, and the second main heat dissipation part 126 is provided with a second heat dissipation pipeline. The first heat dissipation pipeline and the second heat dissipation pipeline are distributed side by side. The pipe openings of the first heat dissipation pipeline and the second heat dissipation pipeline are arranged in the same direction. Since the first heat dissipation pipeline and the second heat dissipation pipeline are connected with the heat dissipation branch 134 outside the electrical box 100, the pipe openings arranged in the same direction allow the shell 102 of the electrical box 100 to be installed from the side away from the pipe openings, that is, the first heat dissipation pipeline and the second heat dissipation pipeline extend into the shell 102 from one side of the shell 102 and extend out of the opening 152 formed in the lower end of the shell 102; or, the first heat dissipation pipeline and the second heat dissipation pipeline can also extend out of the opening 152 formed in the lower end of the shell 102 from top to bottom.

[0094] In some embodiments of the present application, the pipe openings of the first heat dissipation pipeline and the second heat dissipation pipeline are arranged opposite to each other, so that the first heat dissipation pipeline and the second heat dissipation pipeline can also extend out of the opening 152 formed in the lower end of the shell 102 from top to bottom.

[0095] In the description of the above-mentioned embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0096] The above is only a specific implementation manner 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 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 outdoor unit of an air conditioner, comprising: an electrical box comprising: a driving unit comprising: a compressor driving module for driving operation of a compressor; and a fan driving module for driving operation of an outdoor fan; characterized in that it further comprises: a heat dissipation unit comprising: a refrigerant heat dissipation element disposed on one side of the driving unit, in which refrigerant flows, for dissipating heat for the compressor driving module; a driving heat dissipation element disposed between the driving unit and the refrigerant heat dissipation element, for dissipating heat for the compressor driving module and the fan driving module. 2.The outdoor unit of an air conditioner according to claim 1, characterized in that: the refrigerant heat dissipation element comprises: a first heat dissipation portion disposed corresponding to the compressor driving module, a first heat dissipation surface being formed on a side of the first heat dissipation portion away from the compressor driving module. 3.The outdoor unit of an air conditioner according to claim 2, characterized in that: the refrigerant heat dissipation element comprises: a second heat dissipation portion disposed continuously with the first heat dissipation portion, corresponding to the fan driving module, heat dissipation fins being disposed on a side of the second heat dissipation portion away from the fan driving module. 4.The outdoor unit of an air conditioner according to claim 3, characterized in that: the second heat dissipation portion is disposed spaced apart from the driving heat dissipation element, a gap allowing air flow being formed between the second heat dissipation portion and the driving heat dissipation element. 5.The outdoor unit of an air conditioner according to claim 1, characterized in that: the refrigerant heat dissipation element comprises: a main heat dissipation portion in which a heat dissipation pipeline, in which refrigerant flows, is disposed; a rim portion formed on one side of the refrigerant heat dissipation element, a thickness of the rim portion being lower than a thickness of the main heat dissipation portion. 6.The outdoor unit of an air conditioner according to claim 5, characterized in that: the heat dissipation pipeline is connected to a heat dissipation branch, the heat dissipation branch being connected to a refrigerant circuit, the heat dissipation branch extending into the main heat dissipation portion to connect the heat dissipation pipeline; the refrigerant circuit circulates refrigerant in a compressor, a condenser, a throttling element, and an evaporator. 7.The outdoor unit of an air conditioner according to claim 6, characterized in that: an inlet of the heat dissipation branch is located between the condenser and the evaporator. 8.An outdoor unit of an air conditioner, comprising: an electrical box comprising: a first driving unit comprising: a first compressor driving module for driving operation of a first compressor; and a first fan driving module for driving operation of a first outdoor fan; a second driving unit comprising: a second compressor driving module for driving operation of a second compressor; and a second fan driving module for driving operation of a second outdoor fan; characterized in that it further comprises: a first heat dissipation unit comprising: a first refrigerant heat dissipation element disposed on one side of the first driving unit, in which refrigerant flows, for dissipating heat for the first compressor driving module; a first driving heat dissipation element disposed between the first driving unit and the first refrigerant heat dissipation element, for dissipating heat for the first compressor driving module and the first fan driving module. a first drive heat dissipation element disposed between the first drive unit and the first refrigerant heat dissipation element, the first drive heat dissipation element being configured to dissipate heat for the first compressor drive module and the first fan drive module; a second heat dissipation unit comprising: a second refrigerant heat dissipation element disposed on a side of the second drive unit, refrigerant flowing in the second refrigerant heat dissipation element, the second refrigerant heat dissipation element being configured to dissipate heat for the second compressor drive module; a second drive heat dissipation element disposed between the second drive unit and the second refrigerant heat dissipation element, the second drive heat dissipation element being configured to dissipate heat for the second compressor drive module and the second fan drive module; the air conditioner outdoor unit further comprising an adjusting assembly configured to adjust refrigerant flow in the first refrigerant heat dissipation element and the second refrigerant heat dissipation element.

9. The air conditioner outdoor unit of claim 8, wherein: the first refrigerant heat dissipation element comprises: a first main heat dissipation portion in which a first heat dissipation pipeline is disposed, refrigerant flowing in the first heat dissipation pipeline; the second refrigerant heat dissipation element comprises: a second main heat dissipation portion in which a second heat dissipation pipeline is disposed, refrigerant flowing in the second heat dissipation pipeline; the first heat dissipation pipeline and the second heat dissipation pipeline are arranged side by side, and the pipe openings of the first heat dissipation pipeline and the second heat dissipation pipeline are arranged in the same direction.

10. The air conditioner outdoor unit of claim 8, wherein: the first refrigerant heat dissipation element comprises: a first main heat dissipation portion in which a first heat dissipation pipeline is disposed, refrigerant flowing in the first heat dissipation pipeline; the second refrigerant heat dissipation element comprises: a second main heat dissipation portion in which a second heat dissipation pipeline is disposed, refrigerant flowing in the second heat dissipation pipeline; the first heat dissipation pipeline and the second heat dissipation pipeline are arranged side by side, and the pipe openings of the first heat dissipation pipeline and the second heat dissipation pipeline are arranged in opposite directions.

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