Main control board, controller, outdoor unit and air conditioner of air conditioning system

Abstract

The utility model discloses a main control board, a controller, an outdoor unit and an air conditioner of an air conditioning system, and the air conditioning system comprises a strong current filter circuit, an active PFC circuit, an electrolytic capacitor module and a compressor IPM circuit which are electrically connected in sequence. The main control board comprises a first area located on the right side edge of the main control board, a second area adjacent to the first area and a third area adjacent to the second area, and the strong current filter circuit is arranged in the first area; the active PFC circuit is arranged in the second area; the electrolytic capacitor module is arranged on the upper middle portion of the third area, and the compressor IPM circuit is arranged on the lower portion of the third area. Bridge rectifier devices and power devices in the strong current filter circuit and the active PFC circuit are positioned at the lower part and are adjacent to the compressor IPM circuit; the lower portion of the first area, the lower portion of the second area and the lower portion of the third area form a refrigerant heat dissipation area. And the heat dissipation requirement and the EMI requirement of the device can be comprehensively considered under the condition of compact layout.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning circuits, in particular to a main control board, a controller, an outdoor unit and an air conditioner of an air-conditioning system. Background Art

[0002] At present, the controller of the air conditioner is large in size and the device layout is loose, which runs counter to the development direction of controller miniaturization; moreover, the layout of power devices often limits the heat dissipation of power devices and cannot adapt to higher frequency control; if the heat dissipation needs of devices with higher heat generation are given priority, it often leads to a longer current loop, which in turn leads to problems such as high electromagnetic noise and insufficient anti-interference ability. Therefore, the circuit board layout structure of the current air conditioner controller cannot take into account the various requirements of the air conditioning system controller in terms of size performance, heat dissipation performance, and EMI performance. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a main control board, a controller, an outdoor unit and an air conditioner of an air-conditioning system, which can comprehensively consider the heat dissipation requirements and EMI requirements of the components in a compact layout.

[0004] In a first aspect, an embodiment of the utility model provides a main control board of an air conditioning system, wherein the air conditioning system comprises a strong electric filter circuit, an active PFC circuit, an electrolytic capacitor module and a compressor IPM circuit electrically connected in sequence, and the main control board comprises:

[0005] A first area is located at the right edge of the main control board, and the strong electric filter circuit is arranged in the first area;

[0006] A second area, located in the middle area of ​​the main control board and adjacent to the first area, wherein the active PFC circuit is arranged in the second area;

[0007] A third area is located in the middle area of ​​the main control board and is adjacent to the second area, the electrolytic capacitor module is arranged in the middle and upper part of the third area, and the compressor IPM circuit is arranged in the lower part of the third area;

[0008] in:

[0009] The bridge stack devices and power devices in the strong electric filter circuit and the active PFC circuit are located at the lower part and are adjacent to the compressor IPM circuit; the inductor devices and capacitor devices in the strong electric filter circuit and the active PFC circuit are located in the upper middle part; the lower part of the first area, the lower part of the second area and the lower part of the third area constitute a refrigerant heat dissipation area, so that the refrigerant heat dissipation area covers the compressor IPM circuit and the bridge stack devices and power devices in the strong electric filter circuit and the active PFC circuit.

[0010] The main control board of the air-conditioning system provided by the embodiment of the utility model has at least the following beneficial effects: the AC power supply is connected from the right side of the main control board to the strong electric filter circuit of the first area, reaches the active PFC circuit of the adjacent second area, and then reaches the electrolytic capacitor module and the compressor IPM circuit of the adjacent third area. The compressor IPM circuit supplies power to the compressor and then returns to the original path, forming a minimum current loop design, with strong anti-interference ability and low electromagnetic noise; in addition, the bridge stack device and the power device in the strong electric filter circuit and the active PFC circuit are located at the bottom and adjacent to the compressor IPM circuit, so that the refrigerant heat dissipation method can be used to dissipate the heat of the compressor IPM circuit and the devices with large heat generation in the strong electric filter circuit and the active PFC circuit at the same time, with efficient heat dissipation effect, so that the main control board can meet the heat dissipation requirements of the devices under high carrier frequency control, and the main control board can comprehensively consider the heat dissipation requirements and EMI requirements of the devices in a compact layout, that is, the size performance, heat dissipation performance and EMI performance of the controller of the air-conditioning system are taken into account at the same time.

[0011] Some embodiments of the utility model provide a main control board, the air-conditioning system also includes a switching power supply circuit, a fan IPM circuit and a main control chip circuit, the main control board also includes a fourth area located at the left edge of the main control board and adjacent to the third area, the switching power supply circuit, the fan IPM circuit and the main control chip circuit are arranged in the fourth area.

[0012] In some embodiments of the utility model, the main control board is provided, wherein the switching power supply circuit is arranged in the middle of the fourth area, the fan IPM circuit is arranged in the upper part of the fourth area, and the main control chip circuit is arranged in the lower part of the fourth area and adjacent to the compressor IPM circuit.

[0013] In the main control board provided in some embodiments of the present invention, the switch power supply circuit supplies power to the fan IPM circuit and the main control chip circuit respectively.

[0014] In the main control board provided in some embodiments of the present invention, the main control chip circuit provides control signals to the fan IPM circuit and the compressor IPM circuit respectively.

[0015] In some embodiments of the utility model, the main control board provided, the air conditioning system further includes a load interface module, the main control board further includes a fifth area located at the upper edge of the main control board, and the load interface module is arranged in the fifth area.

[0016] In the main control board provided by some embodiments of the present invention, the fifth area is located above the first area, the second area, and the third area and is adjacent to the upper part of the fourth area.

[0017] In the main control board provided by some embodiments of the present invention, the electrolytic capacitor module includes an electrolytic capacitor connected to the output end of the active PFC circuit, and the main control board is applied to a controller of 2000W to 3000W.

[0018] Some embodiments of the present invention provide a main control board, wherein the size of the main control board in the left-right direction is less than 220 mm, and the size in the up-down direction is less than 138.5 mm.

[0019] In a second aspect, an embodiment of the utility model provides a controller, comprising the main control board as described in the embodiment of the first aspect above.

[0020] In a third aspect, an embodiment of the utility model provides an outdoor unit, comprising a main control board as described in the embodiment of the first aspect above or comprising a controller as described in the embodiment of the second aspect above.

[0021] In a fourth aspect, an embodiment of the utility model provides an air conditioner, comprising a main control board as described in the embodiment of the first aspect above, or comprising a controller as described in the embodiment of the second aspect above, or comprising an outdoor unit as described in the embodiment of the third aspect above.

[0022] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the technical solution of the utility model and constitute a part of the specification. Together with the embodiments of the utility model, they are used to explain the technical solution of the utility model and do not constitute a limitation on the technical solution of the utility model.

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0025] Figure 1 It is a circuit schematic diagram of the air conditioning system provided by the embodiment of the utility model;

[0026] Figure 2 It is a schematic diagram of the partitions of the main control panel of the air conditioning system provided by one embodiment of the utility model;

[0027] Figure 3 It is a schematic diagram of the partitions of the main control panel of the air conditioning system provided by another embodiment of the utility model;

[0028] Figure 4It is a schematic diagram of the layout of each circuit module of the main control board provided by the embodiment of the utility model;

[0029] Figure 5 It is a schematic diagram of the layout of the refrigerant heat dissipation area of ​​the main control board provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0030] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0031] In the description of the embodiments of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, "above", "below", "within", etc. are understood to include the number itself, "at least one" means one or more, "at least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. If there is a description of "first", "second", etc., it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] It should be noted that the words such as setting, installing, and connecting in the embodiments of the present invention should be understood in a broad sense, and the technical personnel in the relevant technical field can reasonably determine the specific meanings of the above words in the embodiments of the present invention in combination with the specific content of the technical solution. For example, the term "connection" can be a mechanical connection, an electrical connection, or mutual communication; it can be directly connected or indirectly connected through an intermediate medium.

[0033] It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] At present, the controller of the air conditioner is large, which runs counter to the development direction of controller miniaturization. The size of the main control board restricts the reduction of the size of the air conditioner body. Moreover, the layout of power devices often limits the heat dissipation of power devices and cannot adapt to higher frequency control. If the heat dissipation needs of devices with higher heat generation need to be given priority, it often leads to a longer current loop, which in turn leads to problems such as high electromagnetic noise and insufficient anti-interference ability. Therefore, the circuit board layout structure of the current air conditioner controller cannot take into account the various requirements of the air conditioning system controller in terms of size performance, heat dissipation performance, and EMI performance. In addition, the main control board of the air conditioner often has the problem of loose device layout and inconvenient assembly and plugging during the production process.

[0035] Based on this, the embodiment of the utility model provides a main control board, a controller, an outdoor unit and an air conditioner of an air conditioning system, which can comprehensively consider the heat dissipation requirements and EMI requirements of the components in a compact layout.

[0036] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings.

[0037] Reference Figure 1 , Figure 1 It is a circuit schematic diagram of an air conditioning system provided by an embodiment of the utility model. The air conditioning system includes a strong electric filter circuit F, an active PFC circuit D, an electrolytic capacitor module H, a compressor IPM circuit E, a switching power supply circuit B, a fan IPM circuit A and a main control chip circuit C, wherein the input end of the strong electric filter circuit F is connected to a three-phase AC power supply L1, L2, and L3; the strong electric filter circuit F, the active PFC circuit D, the electrolytic capacitor module H and the compressor IPM circuit E are connected in sequence; the compressor IPM circuit E supplies power to the compressor M1; the switching power supply circuit B can obtain power from the electrolytic capacitor module H, or from one phase of the three-phase AC power supply for rectification to obtain power, the switching power supply circuit B provides low-voltage direct current to the main control chip circuit C and the fan IPM circuit A, and the main control chip circuit C provides control signals to the active PFC circuit D, the compressor IPM circuit E and the fan IPM circuit A, etc.

[0038] Reference Figure 2 , Figure 2 This is a schematic diagram of the partitions of the main control panel of the air conditioning system provided by an embodiment of the utility model. The main control panel includes a first area, a second area, a third area, a fourth area and a fifth area, wherein the first area, the second area, the third area and the fourth area are arranged from right to left, and the fifth area is located above the first area, the second area and the third area. It can be understood that Figure 2 The partitions shown are ideal, that is, the boundaries between the partitions are relatively straight. However, in reality, the boundaries between the partitions may be inclined or tortuous. Figure 3 shown.

[0039] Reference Figure 4 , Figure 4 : is a schematic diagram of the layout of the main control board of the air-conditioning system provided by the first embodiment of the utility model. Specifically, the main control board of the air-conditioning system includes at least a first area, a second area and a third area:

[0040] The first area is located at the right edge of the main control board, and the strong electric filter circuit F is arranged in the first area;

[0041] The second area is located in the middle area of ​​the main control board and is adjacent to the first area, and the active PFC circuit D is arranged in the second area;

[0042] The third area is located in the middle area of ​​the main control board and is adjacent to the second area. The electrolytic capacitor module H is arranged in the middle and upper part of the third area, and the compressor IPM circuit E is arranged in the lower part of the third area.

[0043] Wherein: the bridge components and power components in the strong electric filter circuit F and the active PFC circuit D are located in the lower part and are adjacent to the compressor IPM circuit E; the inductor components and capacitor components in the strong electric filter circuit F and the active PFC circuit D are located in the upper middle part and are adjacent to the electrolytic capacitor module H;

[0044] Reference Figure 5 The lower part of the first area, the lower part of the second area and the lower part of the third area constitute the refrigerant heat dissipation area Z, so that the refrigerant heat dissipation area Z covers the compressor IPM circuit E and the bridge stack devices and power devices in the strong electric filter circuit F and the active PFC circuit D.

[0045] According to the main control board of the air-conditioning system provided by the embodiment of the utility model, the AC power supply is connected to the strong electric filter circuit F of the first area from the right side of the main control board, reaches the active PFC circuit D of the adjacent second area, and then reaches the electrolytic capacitor module H and the compressor IPM circuit E of the adjacent third area. The compressor IPM circuit E supplies power to the compressor and then returns to the original path, forming a minimum current loop design, with strong anti-interference ability and low electromagnetic noise. In addition, the bridge stack device and the power device in the strong electric filter circuit F and the active PFC circuit D are located at the bottom and adjacent to the compressor IPM circuit E, so that the refrigerant heat dissipation method can be used to dissipate the heat of the compressor IPM circuit E and the devices with large heat generation in the strong electric filter circuit F and the active PFC circuit D at the same time, with efficient heat dissipation effect, so that the main control board can meet the heat dissipation requirements of the devices under high carrier frequency control, and the main control board can comprehensively consider the heat dissipation requirements and EMI requirements of the devices in a compact layout, that is, the size performance, heat dissipation performance and EMI performance of the controller of the air-conditioning system are taken into account at the same time.

[0046] Reference Figure 1 and Figure 4 In the main control board provided in some embodiments of the utility model, the air conditioning system further includes a switch power circuit B, a fan IPM circuit A and a main control chip circuit C, and the main control board further includes a fourth area located at the left edge of the main control board and adjacent to the third area, and the switch power circuit B, the fan IPM circuit A and the main control chip circuit C are arranged in the fourth area. Specifically, the switch power circuit B is arranged in the middle of the fourth area, the fan IPM circuit A is arranged in the upper part of the fourth area, and the main control chip circuit C is arranged in the lower part of the fourth area and adjacent to the compressor IPM circuit E.

[0047] Therefore, it can be understood that the fan IPM circuit A and the main control chip circuit C are respectively located on the upper and lower sides of the switching power supply circuit B, so that the switching power supply circuit B can supply power to the fan IPM circuit A and the main control chip circuit C through the shortest power supply line. The switching power supply circuit B, the fan IPM circuit A and the main control chip circuit C are arranged in the fourth area, which can separate the circuit of the low-voltage DC control part from other strong electric circuits and have better EMI performance.

[0048] In addition, it can also be understood that the main control chip circuit C is adjacent to the compressor IPM circuit E, so that the control signal can be provided to the compressor IPM circuit E through a shorter communication line; the main control chip circuit C and the fan IPM circuit A are both arranged in the fourth area, and the distance between the two is also relatively close. The main control chip circuit C can provide a control signal to the fan IPM circuit A through a shorter communication line.

[0049] Reference Figure 1 , Figure 3 and Figure 4 In the main control board provided in some embodiments of the utility model, the air-conditioning system also includes a load interface module G, and the main control board also includes a fifth area located at the upper edge of the main control board. Specifically, the fifth area is located above the first area, the second area, and the third area and adjacent to the upper part of the fourth area, and the load interface module G is arranged in the fifth area.

[0050] It should be noted that the load interface module G may include both high-voltage load interfaces and low-voltage load interfaces, such as main load control relay plug-in ports, expansion valve plug-in ports, solenoid valve plug-in ports, various sensor plug-in ports, etc.

[0051] It should be noted that the actual application scenario of the main control board provided by the embodiment of the utility model is mainly applied to controllers with a power range of 2000W to 3000W, and mainly adopts a single electrolytic capacitor solution, that is, the electrolytic capacitor module H includes an electrolytic capacitor connected to the output end of the active PFC circuit D. Compared with the dual electrolytic capacitor solution, the single electrolytic capacitor solution has the advantages of high power density and small size. Figure 3 and Figure 4It can be seen that the three-phase AC power supply enters from the right layout area of ​​the first area. From top to bottom, this part is the strong electric filter circuit F; then from right to left, it goes to the active PFC circuit D in the second area, and then to the electrolytic capacitor module H and the compressor IPM circuit E in the third area, completing the minimum current loop design; the biggest advantage of the minimum current path is that it has strong anti-interference ability and generates little electromagnetic noise; the lower part of the fourth area is the main control chip circuit C, which controls the fan drive control of the fan IPM circuit A upward and controls the compressor drive control of the compressor IPM circuit E to the right. The switching power supply circuit B is the power supply output, and upward is the fan IPM circuit A at the top of the fourth area and the corresponding functional load in the load interface module G in the fifth area, and downward is the main control chip circuit C at the bottom of the fourth area and the compressor IPM circuit E at the bottom of the third area. In general, the layout of the main control board is mainly designed around the cooling method of refrigerant, which can achieve an increase in power density. On the other hand, the layout is realized by miniaturization of the surrounding line, which is combined with the application of SIC devices. The carrier frequency controlled by software is increased, and the devices in the circuit of the active PFC circuit D in the second area can be reduced in size to complete Figure 4 The layout of this minimum loop is shown.

[0052] The main control board provided in some embodiments of the utility model optimizes the layout of components to reduce the area of ​​the PCB board. Figure 4 The dimension in the left-right direction is less than 220 mm, and the dimension in the up-down direction is less than 138.5 mm, that is, the length of the main control board is less than 220 mm, and the width is less than 138.5 mm.

[0053] In a second aspect, an embodiment of the utility model provides a controller, comprising a main control board as described in the embodiment of the first aspect above.

[0054] According to the controller provided by the embodiment of the utility model, the AC power supply is connected to the strong electric filter circuit F of the first area from the right side of the main control board, reaches the active PFC circuit D of the adjacent second area, and then reaches the electrolytic capacitor module H and the compressor IPM circuit E of the adjacent third area. The compressor IPM circuit E supplies power to the compressor and then returns to the original path, forming a minimum current loop design, with strong anti-interference ability, and small electromagnetic noise generated; in addition, the bridge stack device and the power device in the strong electric filter circuit F and the active PFC circuit D are located at the bottom and adjacent to the compressor IPM circuit E, so that the refrigerant heat dissipation method can be used to simultaneously dissipate the heat of the compressor IPM circuit E and the devices with large heat generation in the strong electric filter circuit F and the active PFC circuit D, with efficient heat dissipation effect, so that the main control board can meet the heat dissipation requirements of the devices under high carrier frequency control, and the main control board can comprehensively consider the heat dissipation requirements and EMI requirements of the devices in a compact layout, that is, the size performance, heat dissipation performance and EMI performance of the controller of the air-conditioning system are taken into account at the same time.

[0055] In a third aspect, an embodiment of the utility model provides an outdoor unit, comprising a main control board as in the embodiment of the first aspect above or a controller as in the embodiment of the second aspect above.

[0056] According to the outdoor unit provided by the embodiment of the utility model, the AC power supply is connected from the right side of the main control board to the strong electric filter circuit F of the first area, reaches the active PFC circuit D of the adjacent second area, and then reaches the electrolytic capacitor module H and the compressor IPM circuit E of the adjacent third area. The compressor IPM circuit E supplies power to the compressor and then returns to the original path, forming a minimum current loop design, with strong anti-interference ability and low electromagnetic noise. In addition, the bridge stack device and the power device in the strong electric filter circuit F and the active PFC circuit D are located at the bottom and adjacent to the compressor IPM circuit E, so that the refrigerant heat dissipation method can be used to simultaneously dissipate the heat of the compressor IPM circuit E and the devices with large heat generation in the strong electric filter circuit F and the active PFC circuit D, with efficient heat dissipation effect, so that the main control board can meet the heat dissipation requirements of the devices under high carrier frequency control, and the main control board can comprehensively consider the heat dissipation requirements and EMI requirements of the devices in a compact layout, that is, the size performance, heat dissipation performance and EMI performance of the controller of the air-conditioning system are taken into account at the same time.

[0057] In a fourth aspect, an embodiment of the utility model provides an air conditioner, comprising a main control board as described in the first aspect embodiment above, or a controller as described in the second aspect embodiment above, or an outdoor unit as described in the third aspect embodiment above.

[0058] According to the air conditioner provided by the embodiment of the utility model, the AC power supply is connected from the right side of the main control board to the strong electric filter circuit F of the first area, reaches the active PFC circuit D of the adjacent second area, and then reaches the electrolytic capacitor module H and the compressor IPM circuit E of the adjacent third area. The compressor IPM circuit E supplies power to the compressor and then returns along the original route, forming a minimum current loop design, with strong anti-interference ability and low electromagnetic noise. In addition, the bridge stack devices and power devices in the strong electric filter circuit F and the active PFC circuit D are located at the bottom and adjacent to the compressor IPM circuit E, so that the refrigerant heat dissipation method can be used to simultaneously dissipate the heat of the compressor IPM circuit E and the devices with large heat generation in the strong electric filter circuit F and the active PFC circuit D, with efficient heat dissipation effect, so that the main control board can meet the heat dissipation requirements of the devices under high carrier frequency control, and the main control board can comprehensively consider the heat dissipation requirements and EMI requirements of the devices in a compact layout, that is, the size performance, heat dissipation performance and EMI performance of the controller of the air-conditioning system are taken into account at the same time.

[0059] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed methods above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium or a non-transitory medium and a communication medium or a temporary medium. As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instructions, data structures, program modules or other data. Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk DVD or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0060] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A main control board of an air conditioning system, characterized in that: The air conditioning system includes a strong electric filter circuit, an active PFC circuit, an electrolytic capacitor module and a compressor IPM circuit which are electrically connected in sequence, and the main control board includes: A first area is located at the right edge of the main control board, and the strong electric filter circuit is arranged in the first area; A second area, located in the middle area of ​​the main control board and adjacent to the first area, wherein the active PFC circuit is arranged in the second area; A third area is located in the middle area of ​​the main control board and is adjacent to the second area, the electrolytic capacitor module is arranged in the middle and upper part of the third area, and the compressor IPM circuit is arranged in the lower part of the third area; in: The bridge stack devices and power devices in the strong electric filter circuit and the active PFC circuit are located in the lower part and are adjacent to the compressor IPM circuit; the inductor devices and capacitor devices in the strong electric filter circuit and the active PFC circuit are located in the upper middle part; the lower part of the first area, the lower part of the second area and the lower part of the third area constitute a refrigerant heat dissipation area, and the refrigerant heat dissipation area covers the compressor IPM circuit and the bridge stack devices and power devices in the strong electric filter circuit and the active PFC circuit.

2. The main control board according to claim 1, characterized in that: The air-conditioning system also includes a switching power supply circuit, a fan IPM circuit and a main control chip circuit. The main control board also includes a fourth area located at the left edge of the main control board and adjacent to the third area. The switching power supply circuit, the fan IPM circuit and the main control chip circuit are arranged in the fourth area.

3. The main control board according to claim 2, characterized in that: The switching power supply circuit is arranged in the middle of the fourth area, the fan IPM circuit is arranged in the upper part of the fourth area, and the main control chip circuit is arranged in the lower part of the fourth area and adjacent to the compressor IPM circuit.

4. The main control board according to claim 3, characterized in that: The switch power supply circuit supplies power to the fan IPM circuit and the main control chip circuit respectively.

5. The main control board according to claim 3, characterized in that: The main control chip circuit provides control signals to the fan IPM circuit and the compressor IPM circuit respectively.

6. The main control board according to claim 2, characterized in that: The air conditioning system further includes a load interface module, and the main control board further includes a fifth area located at an upper edge of the main control board, and the load interface module is arranged in the fifth area.

7. The main control board according to claim 6, characterized in that: The fifth region is located above the first region, the second region, and the third region and is adjacent to an upper portion of the fourth region.

8. The main control board according to claim 1, characterized in that: The electrolytic capacitor module includes an electrolytic capacitor connected to the output end of the active PFC circuit, and the main control board is applied to a controller of 2000W to 3000W.

9. The main control board according to claim 8, characterized in that: The size of the main control board in the left-right direction is less than 220 mm, and the size in the up-down direction is less than 138.5 mm.

10. A controller, characterized in that: A main control board comprising any one of claims 1 to 9.

11. An outdoor unit, characterized in that: Includes the main control board according to any one of claims 1 to 9 or includes the controller according to claim 10.

12. An air conditioner, characterized in that: It comprises the main control board according to any one of claims 1 to 9, or the controller according to claim 10, or the outdoor unit according to claim 11.

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