Air conditioner outdoor unit and air conditioner

Abstract

The utility model discloses an air conditioner outdoor unit and an air conditioner. The air conditioner outdoor unit comprises a circuit board; the liquid return pipe is connected with the liquid storage tank; one side of the radiator is fixedly mounted on the liquid storage tank or the liquid return pipe, and the other side of the radiator is connected with the circuit board; the circuit board is connected with the liquid storage tank or the liquid return pipe, and the liquid storage tank or the liquid return pipe radiates heat of the circuit board through the radiator. According to the air conditioner outdoor unit, the liquid storage tank or the liquid return pipe radiates the heat of the circuit board through the radiator, and the heat radiation efficiency of the circuit board is improved.

Description

Technical Field

[0001] This utility model relates to the field of home appliance technology, and more specifically, to an outdoor unit of an air conditioner and an air conditioner. Background Technology

[0002] With the continuous development of the air conditioning industry, the demand for miniaturization of air conditioning outdoor units is becoming increasingly urgent. For example... Figure 1 As shown, the conventional air conditioner outdoor unit's electrical control component 100 includes an AC power input terminal, a filter circuit, a rectifier bridge, a PFC circuit, a power supply circuit, a main controller, a DC bus capacitor, a compressor IPM (Intelligent Power Module), and a fan IPM. The PFC circuit may include components such as a PFC inductor, a PFC diode, and a PFC power switch. The AC power input terminal of the electrical control component 100 is used to receive AC input voltage. The input terminal of the filter circuit is connected to the AC power input terminal. The input terminal of the rectifier bridge is connected to the output terminal of the filter circuit. The output terminal of the rectifier bridge is connected to the input terminal of the PFC circuit. The output terminal of the PFC circuit is connected to the input terminals of the compressor IPM and the fan IPM. The DC bus capacitor is connected in parallel to the output terminal of the PFC circuit. The main controller is connected to the PFC circuit, the compressor IPM, and the fan IPM respectively. The input terminal of the power supply circuit is connected to the output terminal of the filter circuit. The power supply circuit is used to convert the AC input voltage into various values ​​of drive voltage, such as generating 5V, 15V, etc., to power the main controller and other components.

[0003] like Figure 2 As shown, the traditional air conditioner outdoor unit control board 210 encapsulates the electrical control component 100, which requires an external wiring terminal 220 to complete the wiring connection. In the air conditioner outdoor unit control board 210, due to the compact layout of numerous power devices, heat is difficult to dissipate quickly, and the heat dissipation efficiency is greatly limited. Therefore, the air conditioner outdoor unit control board 210 needs to encapsulate radiator 1 and radiator 2, and radiators 1 and 2 also need to be equipped with long refrigerant heat dissipation pipes, which is simply not compatible with the current trend of air conditioner outdoor units moving towards more compact and miniaturized space planning. Utility Model Content

[0004] In view of the above problems, the purpose of this utility model is to provide an outdoor unit and an air conditioner for improving the heat dissipation efficiency of the circuit board.

[0005] According to one aspect of the utility model, an air conditioner outdoor unit is provided, characterized in that it comprises a circuit board, a liquid return pipe connected to a liquid storage tank, a radiator, one side of the radiator is fixedly installed on the liquid storage tank or the liquid return pipe, the other side of the radiator is connected to the circuit board, the circuit board is connected to the liquid storage tank or the liquid return pipe, and the liquid storage tank or the liquid return pipe dissipates heat from the circuit board through the radiator.

[0006] Optionally, the radiator is detachably connected to the circuit board, and the circuit board is detachably connected to the liquid return pipe of the liquid storage tank.

[0007] Optionally, a fixing device is provided, and the radiator is fixed to the liquid return pipe through the fixing device.

[0008] Optionally, the liquid return pipe has a U-shaped structure.

[0009] Optionally, low-temperature and low-pressure gas dissipates heat from the radiator through the liquid storage tank or the liquid return pipe.

[0010] Optionally, the circuit board comprises an AC power input terminal, a filter circuit, a rectifier bridge, a PFC power switch, a PFC diode, a PFC inductor, a power supply circuit, a main controller, a DC bus capacitor, and a compressor IPM module.

[0011] Optionally, the circuit board further comprises a fan IPM module.

[0012] Optionally, the circuit board comprises a first circuit board for arranging a plurality of power devices and a main controller, and a second circuit board for arranging a plurality of passive devices, and the first circuit board and the second circuit board are connected through a connecting line.

[0013] Optionally, the radiator comprises a first radiator, and the liquid storage tank or the liquid return pipe dissipates heat from the first circuit board through the first radiator.

[0014] Optionally, the radiator further comprises a second radiator, and the liquid storage tank or the liquid return pipe dissipates heat from the second circuit board through the second radiator.

[0015] Optionally, the plurality of power devices at least comprises a PFC power switch, a PFC diode, and a compressor IPM module.

[0016] Optionally, the plurality of passive devices at least comprises a DC bus capacitor and a filter circuit.

[0017] Optionally, the plurality of passive devices are straight insertion devices or patch devices.

[0018] Optionally, the second circuit board is a single-sided board or a double-sided board.

[0019] Optionally, the second circuit board is mounted on a support base of the outdoor unit.

[0020] Optionally, the second circuit board is further provided with an AC power input terminal for connecting with a power line.

[0021] Optionally, the circuit board further comprises a rectifier bridge, a PFC inductor and a power circuit.

[0022] Optionally, one or more of the rectifier bridge, the PFC inductor and the power circuit are arranged on the first circuit board.

[0023] Optionally, one or more of the rectifier bridge, the PFC inductor and the power circuit are arranged on the second circuit board.

[0024] Optionally, the first circuit board comprises a first surface and a second surface opposite to each other, the second surface is connected with the first heat sink, the main controller is arranged on the first surface, and the PFC power switch, the PFC diode and the compressor IPM module are arranged on the second surface.

[0025] Optionally, the circuit board further comprises a fan IPM module arranged on the second surface of the first circuit board.

[0026] Optionally, at least two of the PFC power switch, the PFC diode, the compressor IPM module and the fan IPM module are packaged together.

[0027] Optionally, the PFC power switch, the PFC diode, the compressor IPM module and the fan IPM module are arranged separately.

[0028] Optionally, the PFC power switch and the PFC diode are packaged together.

[0029] Optionally, the PFC power switch and the PFC diode are packaged together, and the compressor IPM module and the fan IPM module are packaged together.

[0030] Optionally, the PFC power switch, the PFC diode and the compressor IPM module are packaged together.

[0031] Optionally, the PFC power switch, the PFC diode and the fan IPM module are packaged together.

[0032] Optionally, the PFC power switch, the PFC diode, the compressor IPM module and the fan IPM module are packaged together.

[0033] Optionally, the second circuit board is further provided with a DC power output terminal and a first communication terminal, and the first circuit board is further provided with a compressor wiring terminal, a fan wiring terminal, a DC power input terminal and a second communication terminal, wherein the compressor wiring terminal is used for connecting with a compressor three-phase motor wiring harness, the fan wiring terminal is used for connecting with a fan three-phase motor wiring harness of the outdoor unit, the DC power input terminal is used for connecting with the DC power output terminal of the second circuit board, and the second communication terminal is used for connecting with the first communication terminal of the second circuit board.

[0034] According to another aspect of the present application, an air conditioner is provided, which comprises an indoor unit and the above-mentioned air conditioner outdoor unit.

[0035] The air conditioner outdoor unit provided by the present application can dissipate heat for the circuit board through the heat sink and the liquid storage tank or the liquid return pipe, thereby improving the heat dissipation efficiency of the circuit board.

[0036] Further, the circuit board provided by the present application is implemented by the first circuit board and the second circuit board provided with multiple power devices, and the volume of the first circuit board is relatively small, and accordingly, the volume of the heat sink connected with the first circuit board can also be reduced, thereby reducing the heat dissipation cost. BRIEF DESCRIPTION OF DRAWINGS

[0037] The above and other objects, features and advantages of the present application will become more apparent from the following description according to embodiments thereof taken in conjunction with the accompanying drawings, in which:

[0038] Figure 1 A circuit schematic diagram of an air conditioner outdoor unit electric control assembly is shown;

[0039] Figure 2 A circuit schematic diagram of a traditional air conditioner outdoor unit electric control board is shown;

[0040] Figure 3 An assembly schematic diagram of a circuit board and a liquid storage tank according to an embodiment of the present application is shown;

[0041] Figure 4 An assembly schematic diagram of a circuit board and a liquid return pipe of a liquid storage tank according to an embodiment of the present application is shown;

[0042] Figure 5 An explosion schematic diagram of a circuit board, a liquid return pipe, a heat sink and a fixing device according to an embodiment of the present application is shown;

[0043] Figure 6 A structure schematic diagram of a circuit board according to a first embodiment of the present application is shown;

[0044] Figure 7 Fig. 2 shows a connection diagram of the first circuit board and the second circuit board according to the second embodiment of the present application;

[0045] Figure 8 Fig. 3 shows another connection diagram of the first circuit board and the second circuit board according to the second embodiment of the present application;

[0046] Figure 9 Fig. 4 shows a structure diagram of the second circuit board according to the second embodiment of the present application;

[0047] Figure 10 Fig. 5 shows another structure diagram of the second circuit board according to the second embodiment of the present application;

[0048] Figure 11 Fig. 6 shows an assembly diagram of the second circuit board according to the second embodiment of the present application;

[0049] Figure 12 Fig. 7 shows a structure diagram of the first circuit board according to the second embodiment of the present application;

[0050] Figure 13 Fig. 8 shows a structure diagram of the first surface of the first circuit board according to the second embodiment of the present application;

[0051] Figure 14 Fig. 9 shows an assembly diagram of the first surface of the first circuit board according to the second embodiment of the present application;

[0052] Figure 15 Fig. 10 shows a structure diagram of the second surface of the first circuit board according to the second embodiment of the present application;

[0053] Figure 16 Fig. 11 shows an assembly diagram of the second surface of the first circuit board according to the second embodiment of the present application;

[0054] Figure 17 Fig. 12 shows another structure diagram of the first circuit board according to the second embodiment of the present application. DETAILED DESCRIPTION

[0055] Various embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like elements or modules are denoted by the same or similar reference numerals to indicate the similarity or identity of elements or modules. For the sake of clarity, each part in the drawings is not drawn to scale.

[0056] It should be understood that in the following description, "circuitry" can include a single or multiple components of hardware, programmable circuitry, state machine circuitry, and / or elements that store instructions for execution by programmable circuitry. When an element or circuitry is referred to as being "connected to" another element or "connected between" two nodes, it can be directly coupled or connected to the other element or there can be intervening elements between the elements, the connection between elements can be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled to" or "directly connected to" another element, it implies that there are no intervening elements between the two.

[0057] It should be noted that if the embodiments of the utility model have the direction indication (such as up, down, left, right, front, back......), the direction indication is only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), if the specific posture changes, then the direction indication also changes accordingly.

[0058] In addition, if the embodiments of the utility model have the description of "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitation, the element limited by the sentence "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0059] Referring to Figure 3 In the utility model, the air conditioner outdoor unit includes compressor 300 and circuit board 10. Compressor 300 includes liquid storage tank 301 and liquid return pipe 311, liquid storage tank 301 is connected with liquid return pipe 311. Liquid storage tank 301 and liquid return pipe 311 are connected with circuit board 10, and liquid return pipe 311 is U-shaped structure.

[0060] Referring to Figure 4 And Figure 5The air conditioner outdoor unit further comprises a radiator 470, one side of the radiator 470 is fixedly installed on the liquid storage tank 301 or the liquid return pipe 311, the other side of the radiator 470 is connected with the circuit board 10, and low-pressure and low-temperature gas is radiated to the radiator 470 through the liquid storage tank 301 or the liquid return pipe 311. In this way, the heat generated by the power device on the circuit board 10 can be quickly radiated through the radiator 470 on the liquid storage tank 301 or the liquid return pipe 311. In addition, the liquid return pipe 311 is arranged in a U-shaped structure, so that the contact area of the liquid return pipe 311 with the radiator 470 is increased, thereby increasing the heat dissipation area.

[0061] Further, the radiator 470 can be installed on the circuit board 10 by one or more combinations of screwing, bolting, riveting, welding, clamping and inserting. The circuit board 10 is also installed on the liquid return pipe 311 by one or more combinations of screwing, bolting, riveting, welding, clamping and inserting.

[0062] Further, in order to facilitate connection and fixation, the air conditioner outdoor unit further comprises a fixing device 480, the liquid return pipe 311 can be installed on one side of the radiator 470 by one or more combinations of screwing, bolting, riveting, welding, clamping and inserting through the fixing device 480, and the other side of the radiator 470 is also detachably connected with the circuit board 10 by one or more combinations of screwing, bolting, riveting, welding, clamping and inserting. Further, the fixing device 480 can be made of aluminum and aluminum alloy, copper and copper alloy, or other metal materials. In this way, the circuit board 10 and / or the radiator 470 are fixed on the liquid return pipe 311 of the liquid storage tank 301, so as to reduce the vibration caused by the relative movement between the liquid storage tank 301 and the compressor 300 and transmitted to the circuit board 10, thereby affecting the normal work of the circuit module on the circuit board 10. At the same time, the components and circuit modules on the circuit board 10 can also accelerate the heat transfer to the liquid return pipe 311 through the radiator 470 during work, thereby improving the heat dissipation efficiency.

[0063] It can be understood that in other embodiments of the present application, if the air conditioner outdoor unit has other liquid storage tanks in addition to the liquid storage tank in the compressor 300, the liquid storage tank 301 can be any liquid storage tank in the air conditioner outdoor unit.

[0064] Reference Figure 6In the first embodiment of the utility model, the circuit board 10 needs the wiring terminal 480 of external connection to complete the line connection. The circuit board 10 includes AC power input terminal 461, filter circuit 401, rectifier bridge 401, PFC circuit 440, power supply circuit 412, main controller 422, DC bus capacitor 403, compressor IPM module 431 and fan IPM module 432. The connection mode and the role of AC power input terminal 461, filter circuit 401, rectifier bridge 401, PFC circuit 440, power supply circuit 412, main controller 422, DC bus capacitor 403, compressor IPM module 431 and fan IPM module 432 are same with Figure 1 The second embodiment of the utility model.

[0065] It should be noted that, as Figure 6 The circuit board 10 shown in the figure is too large in size, resulting in poor heat dissipation effect through the liquid return pipe 311, and the heat source device inside the circuit board 10 dissipates heat to the non-heat source device, which affects the work of the non-heat source device.

[0066] Referring to Figure 7 , in order to avoid the occurrence of the above problems, in the second embodiment of the utility model, the circuit board 10 includes a first circuit board 400 and a second circuit board 500. The second circuit board 500 is provided with various passive devices 411 with large area, power supply circuit 412 and wiring terminal 413, the first circuit board 400 is provided with various power devices 421 and main controller 422, the first circuit board 400 and the second circuit board 500 are connected by connecting line 430, and the various power devices 421 generate heat when working. For example, the connecting line 430 can include PFC positive line PFC+, DC bus positive line VDC, 15V power supply line VCC, ground wire GND and communication / control signal line, etc. Further, the second circuit board 500 is also connected with live wire L1, zero line N1, ground wire PE1 and communication signal line SI1 of indoor unit to receive AC input power and / or various communication and control signals.

[0067] Further, referring to Figure 8 In another embodiment, the first circuit board 400 is provided with various power devices 421, main controller 422 and power supply circuit 412, and the second circuit board 500 is provided with various passive devices 411 with large area and wiring terminal 413, which is not limited by the utility model.

[0068] Further, referring to Figure 9 and Figure 12In the second embodiment of the utility model, the PFC circuit 440 can include PFC inductance 441, PFC diode 442 and PFC power switch 443 and other components to realize power factor correction of the DC power supply. The PFC circuit 440 can be realized by passive PFC circuit to constitute a boost PFC circuit, or a buck PFC circuit, or a buck-boost PFC circuit. It can be understood that in actual application, the position and connection relationship of PFC power switch 443 and rectifier bridge 401 can be adaptively adjusted according to the PFC circuit 440 setting type. The PFC circuit 440 is controlled based on the main controller (for example, MCU) 422, and the DC voltage input by the rectifier bridge 401 is adjusted in power factor, for example, the DC voltage output by the rectifier bridge 401 is raised and stabilized at 380V, so that the input current follows the voltage, and the power factor of the DC power supply is ensured to be above 0.9. The adjusted DC is transmitted to the DC bus capacitor 403, and after filtering by the DC bus capacitor 403, it is output to the compressor IPM module 431 and the fan IPM module 432 to supply power to the compressor IPM module 431 and the fan IPM module 432.

[0069] Further, with reference to Figure 9 And Figure 11 In the second embodiment of the utility model, the rectifier bridge 401, the DC bus capacitor 403, the filter circuit 404 and the PFC inductance 441 and other passive devices are arranged on the second circuit board 500. Since these components have a large area and are all straight insertion devices, the PCB board of the second circuit board 500 can be a single-sided board, which is beneficial to reduce the cost of the PCB board. Further, the second circuit board 500 is also provided with an AC power input terminal 461, a DC power output terminal 462 and a communication terminal 413. The AC power input terminal 461 is used to connect with the input power line 417 to receive the AC input voltage and the communication signal of the indoor unit. The DC power output terminal 462 is used to connect with the first circuit board 400 to provide DC voltage thereto. The communication terminal 413 is used to realize communication and transmission of control signals between the first circuit board 400 and the second circuit board 500. In a further embodiment, the second circuit board 500 can also be provided with a simple function control chip, which can communicate with the main controller 422 on the first circuit board 400 through the communication terminal 413.

[0070] In addition, in the first embodiment of the utility model, need additional setting a wiring converter to realize input power cord and the electric connection of first circuit board 400, and in the second embodiment of the utility model, because the area of second circuit board 500 is smaller, therefore can set second circuit board 500 on support base 450, and can connect power cord 417 directly to the AC power input terminal 461 of second circuit board 500, therefore the air conditioner outdoor unit of this embodiment can save a wiring converter relative to prior art, reduce the material cost and installation procedure of air conditioner outdoor unit.

[0071] In the second embodiment of the utility model, power supply circuit 412 can be composed of transformer, DC voltage stabilizing chip, switching power supply chip, voltage sampling resistance, current sampling resistance and other components, and power supply circuit 412 is used to convert the input AC power or DC power to generate various numerical driving voltages, for example, 3.3V, 5V, 12V, 15V and other voltages, to supply power for the components on first circuit board 400, such as main controller 422 and second circuit board 500. In this embodiment, filter circuit 404 can provide EMC, EMS and lightning protection and other related functional protection for first circuit board 400 and second circuit board 500.

[0072] It should be noted that, referring to Figure 10 In another embodiment, rectifier bridge 401, power supply circuit 412 and PFC inductor 441 can also be arranged on first circuit board 400, and only DC bus capacitor 403, filter circuit 404, communication terminal 413, AC power input terminal 461 and DC power output terminal 462 are arranged on second circuit board 500, which is not limited by the utility model.

[0073] Further, referring to Figure 12 to Figure 16 The first circuit board 400 of the second embodiment of the utility model has a first surface 405 and a second surface 406 opposite to each other. The main controller 422 and the wiring terminal 423 are arranged on the first surface 405, and the plurality of power devices 421 are arranged on the second surface 406. It should be noted that, in another embodiment, the first circuit board 400 can also be a single-sided board, and the plurality of power devices 421 and the main controller 422 can be arranged on the same surface of the first circuit board 400, which is not limited by the utility model.

[0074] Further, the plurality of power devices 421 can include the compressor IPM module 431, the PFC diode 442, the fan IPM module 432 and the PFC power switch 443.

[0075] Further, the wiring terminals 423 arranged on the first surface 405 of the first circuit board 400 can include a fan wiring terminal 451, a direct current power input terminal 452, a compressor wiring terminal 453, and a communication terminal 454. The fan wiring terminal 451 is used to connect with a fan three-phase motor wire harness of an outdoor unit of an air conditioner, the direct current power input terminal 452 is used to connect with a direct current power output terminal 462 on the second circuit board 500, the compressor wiring terminal 453 is used to connect with a compressor three-phase motor wire harness, and the communication terminal 454 is used to connect with a communication terminal 413 on the second circuit board 500.

[0076] Further, the main controller 422 encapsulates a time sequence controller, a memory, a data processor, and a software program and / or module stored in the memory and executable on the data processor. The main controller 422 receives a control signal output from a control unit by running or executing the software program and / or module stored in the memory, calling data stored in the memory, and communicating with the control unit on the second circuit board 500 and the indoor unit through the communication interface 454. The main controller 422 converts the control signal into a corresponding logic level signal and outputs the logic level signal to the PFC power switch 443, the compressor IPM module 431, and the fan IPM module 432 to drive the PFC power switch 443, the compressor IPM module 431, and the fan IPM module 432 to work.

[0077] It can be understood that the first surface 405 of the first circuit board 400 can also be provided with a real-time detection circuit capable of detecting the current, temperature, and voltage of each element in the rectifier bridge 401, the PFC power switch 443, the compressor IPM module 431, and the fan IPM module 432. When a serious overload or even a short circuit, or a temperature overheating, or a driving voltage overvoltage fault occurs, the real-time detection circuit can control the power devices in the IPM module to soft-shut down and send a fault signal to the control circuit unit, so that the control circuit unit controls other circuit modules to work, thereby avoiding damage to other circuit modules due to the fault.

[0078] In the second embodiment of the utility model, referring to Figure 17 The heat sink 470 includes a first heat sink 471. The liquid storage tank 301 or the liquid return pipe 311 passes through the first heat sink 471 to dissipate heat from the power devices on the first circuit board 400, thereby reducing the temperature on the first circuit board 400. Since the volume of the first circuit board 400 in the second embodiment of the utility model is smaller than that of the circuit board 10 in the first embodiment, the volume of the heat sink for dissipating heat can also be reduced, thereby reducing the cost of heat dissipation.

[0079] Further, the heat sink 470 further comprises a second heat sink (not shown in the figure), and the liquid storage tank 301 or the liquid return pipe 311 dissipates heat to the second circuit board 500 through the second heat sink, so as to reduce the temperature on the second circuit board 500.

[0080] In the first and second embodiments of the utility model, the number of the DC bus capacitor 403 can be one or multiple, which can be set according to the number of power devices, for example, in 1 or 2 air conditioners, the number of the DC bus capacitor 403 is generally set to one, and in 3 or more air conditioners, the number of the DC bus capacitor 403 is generally set to two or more. Of course, in other embodiments, the number of the DC bus capacitor 403 can be set according to the energy storage demand of the power device, which is not limited here.

[0081] The compressor IPM module 431 encapsulates multiple power switch tubes, and the multiple power switch tubes form a drive inverter circuit, for example, a three-phase inverter bridge circuit formed by six power switch tubes or a two-phase inverter bridge circuit formed by four power switch tubes. Among them, each power switch tube can be realized by using a MOS tube or an IGBT. The compressor IPM module 431 is used to drive a compressor motor. Of course, in other embodiments, the compressor IPM module 431 can also be used to drive other motor frequency converters and various inverter power supplies, and be applied to the fields of variable frequency speed regulation, metallurgical machinery, electric traction, servo drive, and variable frequency household appliances such as air conditioners.

[0082] It can be understood that, in order to improve the integration of the compressor IPM module 431 and reduce the size of the circuit board, the PFC diode 442 and / or the PFC power switch 443 can be encapsulated in the compressor IPM module 431 in the embodiment. Of course, in other embodiments, the PFC diode 442, the PFC power switch 443 and the compressor IPM module 431 can also be separately arranged, which is not limited here.

[0083] It should be noted that the outdoor fan of the air conditioner can be divided into an alternating current fan and a direct current fan, and the alternating current fan generally does not need to be driven to work, while the direct current fan needs to be driven by power to control its work. In the embodiment, the outdoor fan can be realized by selecting a direct current fan, and accordingly, the embodiment further provides a direct current fan IPM module 432 for driving the direct current fan. The direct current fan IPM module 432 and the compressor IPM module 431 respectively encapsulate multiple power switch tubes such as IGBTs and MOS tubes, and the number of the multiple power switch tubes can be four or six, and the specific number can be set according to the type of the motor and the driving power, which is not limited here.

[0084] Further, in order to reduce the volume of the circuit board, the PFC diode 442 and / or the PFC power switch 443 can be packaged in the fan IPM module 432, or the PFC diode 442 and the PFC power switch 443 can be packaged together, the compressor IPM module 431 and the fan IPM module 432 can be packaged together, or the PFC diode 442, the PFC power switch 443, the compressor IPM module 431 and the fan IPM module 432 can be packaged together. Of course, in other embodiments, the PFC diode 442, the PFC power switch 443, the compressor IPM module 431 and the fan IPM module 432 can be arranged separately, which is not limited here.

[0085] In further embodiments, the utility model also provides a kind of air conditioner, the air conditioner can include indoor unit as above described air conditioner outdoor unit, and the main controller of the air conditioner outdoor unit is connected with the main control chip of the indoor unit.

[0086] It should be understood that the air conditioner can be a split-type air conditioner or an integrated air conditioner, since the embodiments of the air conditioner include all the embodiments of the air conditioner outdoor unit described above, and have the same technical effects as the air conditioner outdoor unit described above, which will not be repeated here.

[0087] According to the embodiments of the utility model as described above, these embodiments do not describe all the details, nor limit the utility model to only specific embodiments. Obviously, many modifications and variations can be made in light of the above description. The present description selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that those skilled in the art can well utilize the utility model and make modifications and uses based on the utility model. The scope of protection of the utility model should be limited by the scope of the claims of the utility model and their equivalents.

Claims

1. An air conditioner outdoor unit characterized by comprising: The utility model relates to an air conditioner outdoor unit, comprising: a circuit board; a liquid return pipe connected to a liquid storage tank; a heat sink, one side of the heat sink being fixedly installed on the liquid storage tank or the liquid return pipe, the other side of the heat sink being connected to the circuit board; the circuit board and the liquid storage tank or the liquid return pipe are connected, and the liquid storage tank or the liquid return pipe dissipates heat from the circuit board through the heat sink.

2. The air conditioner outdoor unit according to claim 1, characterized by The heat sink is detachably connected to the circuit board, and the circuit board is detachably connected to the liquid return pipe of the liquid storage tank.

3. The air conditioner outdoor unit according to claim 1, characterized by Further comprising: a fixing device, the heat sink being fixed to the liquid return pipe through the fixing device.

4. The air conditioner outdoor unit according to claim 1, characterized by The liquid return pipe has a U-shaped structure.

5. The air conditioner outdoor unit according to claim 1, wherein low-temperature and low-pressure gas dissipates heat from the heat sink through the liquid storage tank or the liquid return pipe.

6. The air conditioner outdoor unit according to claim 1, characterized by The circuit board comprises: an AC power input terminal, a filter circuit, a rectifier bridge, a PFC power switch, a PFC diode, a PFC inductor, a power supply circuit, a main controller, a DC bus capacitor, and a compressor IPM module.

7. The air conditioner outdoor unit according to claim 6, characterized by The circuit board further comprises a fan IPM module.

8. The air conditioner outdoor unit according to claim 1, characterized by The circuit board comprises: a first circuit board for arranging a plurality of power devices and a main controller, the first circuit board and a second circuit board being connected through a connecting line, the second circuit board for arranging a plurality of passive devices.

9. The air conditioner outdoor unit according to claim 8, characterized by The heat sink comprises a first heat sink, and the liquid storage tank or the liquid return pipe dissipates heat from the first circuit board through the first heat sink.

10. The air conditioner outdoor unit according to claim 9, characterized by The heat sink further comprises a second heat sink, and the liquid storage tank or the liquid return pipe dissipates heat from the second circuit board through the second heat sink.

11. The air conditioner outdoor unit according to claim 9, characterized in that, Further comprising: the plurality of power devices at least comprising a PFC power switch, a PFC diode, and a compressor IPM module.

12. The air conditioner outdoor unit according to claim 9, characterized by The plurality of passive devices at least comprising a DC bus capacitor and a filter circuit. 13.The outdoor unit of claim 9, wherein The plurality of passive devices are straight-insertion devices or patch devices. 14.The outdoor unit of claim 9, wherein The second circuit board is a single-sided board or a double-sided board.

15. The air conditioner outdoor unit according to claim 9, characterized by The second circuit board is mounted on a support base of the air conditioner outdoor unit. 16.The outdoor unit of claim 9, wherein The second circuit board further comprises an AC power input terminal for connecting to a power line.

17. The air conditioner outdoor unit according to claim 9, characterized by The circuit board further comprises a rectifier bridge, a PFC inductor, and a power supply circuit. 18.The outdoor unit of claim 17, wherein One or more of the rectifier bridge, the PFC inductor, and the power supply circuit are arranged on the first circuit board.

19. The air conditioner outdoor unit according to claim 17, characterized by One or more of the rectifier bridge, the PFC inductor, and the power supply circuit are arranged on the second circuit board.

20. The air conditioner outdoor unit according to claim 11, wherein The first circuit board comprises opposite first and second surfaces, the second surface being connected to the first heat sink, the main controller being arranged on the first surface, and the PFC power switch, the PFC diode, and the compressor IPM module being arranged on the second surface.

21. The air conditioner outdoor unit according to claim 20, wherein The circuit board further comprises a fan IPM module, and the fan IPM module is arranged on the second surface of the first circuit board.

22. The air conditioner outdoor unit according to claim 21, characterized by At least two of the PFC power switch, the PFC diode, the compressor IPM module, and the fan IPM module are packaged together.

23. The air conditioner outdoor unit according to claim 21, wherein The PFC power switch, the PFC diode, the compressor IPM module and the fan IPM module are separately arranged.

24. The air conditioner outdoor unit according to claim 20, wherein The PFC power switch and the PFC diode are packaged together.

25. The air conditioner outdoor unit according to claim 21, wherein The PFC power switch and the PFC diode are packaged together, and the compressor IPM module and the fan IPM module are packaged together.

26. The air conditioner outdoor unit according to claim 20, wherein The PFC power switch, the PFC diode and the compressor IPM module are packaged together.

27. The air conditioner outdoor unit according to claim 21, wherein The PFC power switch, the PFC diode and the fan IPM module are packaged together. 28.The air conditioner outdoor unit according to claim 21, characterized in that, The PFC power switch, the PFC diode, the compressor IPM module and the fan IPM module are packaged together.

29. The air conditioner outdoor unit according to claim 16, wherein The second circuit board is further provided with a DC power output terminal and a first communication terminal, and the first circuit board is further provided with a compressor wiring terminal, a fan wiring terminal, a DC power input terminal and a second communication terminal, The compressor wiring terminal is used for connecting with a compressor three-phase motor wire harness, the fan wiring terminal is used for connecting with a fan three-phase motor wire harness of an outdoor unit, the DC power input terminal is used for connecting with the DC power output terminal of the second circuit board, and the second communication terminal is used for connecting with the first communication terminal of the second circuit board.

30. An air conditioner, comprising: The air conditioner outdoor unit comprises an indoor unit and the air conditioner outdoor unit according to any one of claims 1-29.

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