Air conditioner control panel and air conditioner

Abstract

The utility model provides an air conditioner control panel and an air conditioner, and relates to the technical field of air conditioners, and the air conditioner control panel comprises a substrate which is provided with a fan driving circuit, a switching power supply circuit, a control circuit, a PFC circuit, a compressor driving circuit and a power supply filter circuit; the input end of the PFC circuit is connected with the power supply filter circuit, the output end of the PFC circuit is electrically connected with the fan driving circuit, the switching power supply circuit and the compressor driving circuit, and the control circuit is electrically connected with the fan driving circuit and the compressor driving circuit; the power supply filter circuit and the PFC circuit are sequentially arranged from the first side to the second side and are adjacent to each other, the fan driving circuit, the switching power supply circuit and the compressor driving circuit are arranged around the PFC circuit, and the control circuit is arranged between the switching power supply circuit and the fan driving circuit. By optimizing the layout of each circuit on the substrate, the area of the PCB is reduced, and the integration level and the overall performance of the circuit are improved.

Description

Technical Field

[0001] This application relates to the field of air conditioner technology, and in particular to an air conditioner control board and an air conditioner. Background Technology

[0002] The current air conditioning control boards are relatively large in size and the component layout is rather loose, which makes assembly and plug-in operations inconvenient during the production process. This is contrary to the development trend of miniaturization of air conditioning controllers. Utility Model Content

[0003] The main purpose of this utility model is to provide an air conditioner control board, which aims to improve the utilization rate of the air conditioner control board and achieve miniaturization.

[0004] To achieve the above objectives, this utility model provides an air conditioner control board, the air conditioner control board comprising:

[0005] The base plate is equipped with a fan drive circuit, a switching power supply circuit, a control circuit, a PFC circuit, a compressor drive circuit, and a power filter circuit.

[0006] The input terminal of the PFC circuit is connected to the power filter circuit, and the output terminal of the PFC circuit is electrically connected to the fan drive circuit, the switching power supply circuit and the compressor drive circuit respectively. The control circuit is electrically connected to the fan drive circuit and the compressor drive circuit respectively.

[0007] The substrate has a first side and a second side opposite to each other. The power filter circuit and the PFC circuit are arranged sequentially and adjacent to each other from the first side to the second side. The fan drive circuit, the switching power supply circuit and the compressor drive circuit are arranged around the PFC circuit. The control circuit is located between the switching power supply circuit and the fan drive circuit.

[0008] Optionally, the substrate has a third side adjacent to the first side and the second side, and the power devices of the power supply filter circuit, the power devices of the PFC circuit, the power devices of the compressor drive circuit, and the power devices of the fan drive circuit are arranged sequentially along the third side of the substrate.

[0009] Optionally, the air conditioner control panel further includes:

[0010] A heat sink is disposed on the power devices of the fan drive circuit, the compressor drive circuit, the PFC circuit, and the power supply filter circuit.

[0011] Optionally, the signal lines and ground lines of the switching power supply circuit are arranged close to each other on the substrate; the signal lines and ground lines of the PFC circuit are arranged close to each other on the substrate; and the signal lines and ground lines of the power filter circuit are arranged close to each other on the substrate.

[0012] Optionally, the PFC circuit includes a PFC inductor and a high-voltage capacitor; the PFC inductor is disposed close to the power supply filter circuit, the high-voltage capacitor is located on the side of the PFC inductor facing away from the power supply filter circuit on the substrate, and the fan drive circuit, the switching power supply circuit and the compressor drive circuit surround the high-voltage capacitor.

[0013] Optionally, the PFC circuit further includes an IGBT and a diode; the PFC inductor and the high-voltage capacitor are disposed in the middle of the substrate, and the diode, the IGBT, the compressor drive circuit, the control circuit, the switching power supply circuit, and the power filter circuit are arranged around the PFC inductor and the high-voltage capacitor.

[0014] Optionally, the substrate is further provided with an interface circuit, which is located on the side of the substrate and close to the control circuit.

[0015] Optionally, the substrate is provided with a main ground line, which is connected in parallel at a single point to the fan drive circuit, the switching power supply circuit, the control circuit, the PFC circuit, the compressor drive circuit, and the power filter circuit.

[0016] Optionally, the length of the substrate is no greater than 220 mm, and the width of the substrate is no greater than 138.5 mm.

[0017] In addition, to achieve the above objectives, this utility model also provides an air conditioner, which includes an indoor unit, an outdoor unit, and an electrical control box. The electrical control box includes an air conditioner control board as described above. The air conditioner control board is electrically connected to the indoor unit and the outdoor unit respectively, and is used to control the operation of the indoor unit and the outdoor unit respectively.

[0018] Optionally, the indoor unit and the outdoor unit are integrated, the indoor unit is provided with a first air duct, and the electrical control box is located on the airflow path of the first air duct.

[0019] Optionally, the electrical control box is located at the air inlet of the first air duct, and the electrical control box has a heat dissipation air duct that is connected to the first air duct.

[0020] Optionally, the air conditioner includes a front panel having a display side and a mounting side facing away from the display side, with the indoor unit and outdoor unit respectively disposed on the mounting side of the front panel;

[0021] The electrical control box is installed on the side of the indoor unit closer to the outdoor unit and adjacent to the front cover.

[0022] Optionally, the air conditioner control board includes an interface circuit, and the side of the air conditioner control board with the interface circuit is located away from the indoor unit.

[0023] Optionally, the air conditioner control board has a second side and a fourth side adjacent to each other, the second side of the air conditioner control board being away from the front cover, the fourth side of the air conditioner control board being close to the outdoor unit, and the interface circuit being located at the junction of the second side and the fourth side of the air conditioner control board.

[0024] Optionally, the electrical control box includes an electrical control box base. The electrical control box base has an inner cable outlet buckle, an outer cable outlet buckle, and an outer cable routing groove on the fourth side near the air conditioner control board. The inner cable outlet buckle is used to guide the wiring harness of the interface circuit to the indoor unit, and the outer cable outlet buckle is used to guide the wiring harness of the interface circuit to the outer cable routing groove, and then to the outdoor unit through the outer cable routing groove.

[0025] Optionally, the electrical control box base has a power cord outlet on the side near the front cover.

[0026] This embodiment of the invention features a substrate incorporating a fan drive circuit, a switching power supply circuit, a control circuit, a PFC circuit, a compressor drive circuit, and a power filter circuit. The PFC circuit is electrically connected to each of these circuits. The control circuit is also electrically connected to both the fan drive circuit and the compressor drive circuit. A first side and a second side are positioned opposite each other on the substrate. The power filter circuit and the PFC circuit are arranged sequentially and adjacently along these two sides. The fan drive circuit, the switching power supply circuit, and the compressor drive circuit surround the PFC circuit. The control circuit is located between the switching power supply circuit and the fan drive circuit, thus achieving a compact circuit layout. By optimizing the layout of each circuit component on the substrate, not only is the PCB area reduced, but the circuit integration and overall performance are also improved. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a circuit block diagram of an air conditioner control board according to an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A schematic diagram of the structure of an air conditioner control board;

[0031] Figure 3 This is a schematic diagram of the structure of an air conditioner control board according to another embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of an air conditioner control board according to another embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of an air conditioner control board according to another embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of an air conditioner control board according to another embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of an air conditioner control board according to another embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the structure of an air conditioner control board according to another embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the structure of an air conditioner according to an embodiment of the present invention;

[0038] Figure 10 This is a schematic diagram of the structure of an air conditioner according to another embodiment of the present invention;

[0039] Figure 11 This is a schematic diagram of the structure of an air conditioner according to another embodiment of the present invention;

[0040] Figure 12 This is a schematic diagram of the structure of an air conditioner according to another embodiment of the present invention;

[0041] Figure 13 This is a schematic diagram of the structure of an air conditioner according to another embodiment of the present invention;

[0042] Figure 14This is a schematic diagram of the structure of an air conditioner according to another embodiment of the present invention;

[0043] Figure 15 This is a schematic diagram of the structure of an air conditioner according to another embodiment of the present invention;

[0044] Figure 16 This is a schematic diagram of the structure of an air conditioner according to another embodiment of the present invention.

[0045] Explanation of icon numbers:

[0046]

[0047] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Well-known modules, units, and their connections, links, communications, or operations are not shown or described in detail. Furthermore, the described features, architectures, or functions can be combined in any way in one or more embodiments. Those skilled in the art should understand that the various embodiments described below are only for illustration and not for limiting the scope of protection of the present utility model. It is also readily understood that the modules or units or processing methods in the various embodiments described herein and shown in the accompanying drawings can be combined and designed in various different configurations. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0049] The definitions of various terms or methods used in the following embodiments are, except where logically impossible, generally defined as broad concepts that can be implemented under the premise of the content disclosed in the embodiments. Under this understanding, all specific subordinate limitations of the terms or methods should be regarded as part of the utility model content of this utility model, and should not be narrowly interpreted or biased on the grounds that the specification does not disclose the specific limitation. Similarly, provided that it is logically feasible, the order of the steps in the method is flexible and variable, and all specific subordinate limitations in the broad concepts of various terms or methods fall within the scope of protection of this utility model.

[0050] It should be understood that the existing air conditioning control boards are relatively large in size and the component layout is relatively loose, which makes the assembly and plug-in operations inconvenient during the production process. This is contrary to the development trend of miniaturization of air conditioning controllers.

[0051] To address the aforementioned issues, this embodiment of the application electrically connects the PFC circuit to the power filter circuit, fan drive circuit, switching power supply circuit, control circuit, and compressor drive circuit, respectively. The control circuit is also electrically connected to both the fan drive circuit and the compressor drive circuit. This creates a circuit connecting the fan drive circuit, switching power supply circuit, control circuit, PFC circuit, compressor drive circuit, and power filter circuit on the substrate. The power filter circuit and PFC circuit are then sequentially arranged adjacent to each other along the first and second sides of the substrate. External AC power flows from the power filter circuit to the PFC circuit. The fan drive circuit, switching power supply circuit, and compressor drive circuit are arranged around the PFC circuit, which is electrically connected to and supplies power. The control circuit is located between the switching power supply circuit and the fan drive circuit, thus reducing the distance between the control circuit and the switching power supply circuit or between the control circuit and the fan drive circuit.

[0052] This application provides a solution for achieving a compact circuit layout. By optimizing the layout of various circuit components on the substrate, not only is the PCB area reduced, but the circuit integration and overall performance are also improved.

[0053] Reference Figure 1 and Figure 2 In one embodiment of this utility model, the air conditioner control board includes a base plate 10, a fan drive circuit 40, a switching power supply circuit 60, a control circuit 70, a PFC circuit 30, a compressor drive circuit 50, and a power filter circuit 20 disposed on the base plate 10, wherein:

[0054] The input terminal of the PFC circuit is connected to the power filter circuit, and the output terminal of the PFC circuit 30 is electrically connected to the fan drive circuit 40, the switching power supply circuit 60, and the compressor drive circuit 50, respectively. The control circuit 70 is electrically connected to the fan drive circuit 40 and the compressor drive circuit 50, respectively. The substrate 10 has a first side and a second side facing each other. The power filter circuit 20 and the PFC circuit 30 are arranged sequentially and adjacently from the first side to the second side. The fan drive circuit 40, the switching power supply circuit 60, and the compressor drive circuit 50 are arranged around the PFC circuit 30. The control circuit 70 is located between the switching power supply circuit 60 and the fan drive circuit 40.

[0055] In the air conditioner control board, the substrate 10 is typically made of an insulating material, such as glass fiber reinforced plastic (FR4) board. On this substrate 10, a power filter circuit 20, a power factor correction (PFC) circuit, a switching power supply circuit 60, a fan drive circuit 40, a compressor drive circuit 50, and a control circuit 70 are sequentially arranged.

[0056] Among these components, the power filter circuit 20 filters the input AC power to reduce noise and interference, ensuring stable circuit operation. The power factor correction (PFC) circuit aims to improve the power factor, reduce current harmonics, and thus improve the overall energy efficiency of the air conditioner control board. The switching power supply circuit 60 is responsible for converting AC to DC power, providing a stable power supply for the control circuit 70. The fan drive circuit 40 controls the operation of the air conditioner's internal fan, regulating airflow. The compressor drive circuit 50 directly manages the compressor's operation and is the core of the air conditioner's cooling or heating function. The control circuit 70 undertakes the logic control tasks of the entire air conditioner control board, including temperature monitoring, mode switching, fault diagnosis, and other functions.

[0057] To optimize the layout of the air conditioner control board, this embodiment, based on the electrical connections between the fan drive circuit 40, switching power supply circuit 60, control circuit 70, PFC circuit 30, compressor drive circuit 50, and power filter circuit 20, arranges the PFC circuit 30 and power filter circuit 20 along the first and second sides of the substrate 10. This effectively utilizes space and ensures smooth circuit connections. For example, Figure 2 As shown, the right side of the long side of the substrate 10 is the first side, facilitating the connection of an external power source. The PFC circuit 30 is electrically connected to the power filter circuit 20, the fan drive circuit 40, the switching power supply circuit 60, and the compressor drive circuit 50. Given the electrical connections between the PFC circuit 30 and multiple circuits, the fan drive circuit 40, the switching power supply circuit 60, and the compressor drive circuit 50 can be arranged around the PFC circuit 30. This allows for convenient electrical connections between circuits connected to the PFC circuit 30, reduces current loops, and improves the directness and efficiency of inter-circuit connections. Furthermore, the control circuit 70 is placed between the switching power supply circuit 60 and the fan drive circuit 40. This arrangement helps shorten the signal transmission path between the control circuit 70 and other circuits, thereby improving response speed and control accuracy. Through this layout optimization, the size of the air conditioner control board is reduced while maintaining high circuit efficiency, meeting the miniaturization needs of air conditioner controllers.

[0058] In this embodiment, a fan drive circuit 40, a switching power supply circuit 60, a control circuit 70, a PFC circuit 30, a compressor drive circuit 50, and a power filter circuit 20 are provided on a substrate 10. The PFC circuit 30 is electrically connected to the power filter circuit 20, the fan drive circuit 40, the switching power supply circuit 60, the control circuit 70, and the compressor drive circuit 50. The control circuit 70 is electrically connected to both the fan drive circuit 40 and the compressor drive circuit 50. A first side and a second side are provided on the substrate 10, and the power filter circuit 20 and the PFC circuit 30 are arranged sequentially and adjacently along the first and second sides. The fan drive circuit 40, the switching power supply circuit 60, and the compressor drive circuit 50 are arranged around the PFC circuit 30. The control circuit 70 is located between the switching power supply circuit 60 and the fan drive circuit 40, thus achieving a compact circuit layout. By optimizing the layout of each part of the circuit on the substrate 10, not only is the PCB area reduced, but the integration and overall performance of the circuit are also improved.

[0059] Optionally, refer to Figure 2 Another embodiment of this utility model provides an air conditioner control board, based on the above. Figure 1 and Figure 2 In the embodiment shown, the substrate 10 has a third side adjacent to the first side and the second side, and the power devices of the power supply filter circuit 20, the power devices of the PFC circuit 30, the power devices of the compressor drive circuit 50 and the power devices of the fan drive circuit 40 are arranged sequentially along the third side of the substrate 10.

[0060] In the design of the air conditioner control board, the third side of the substrate 10 can be one side along the long side of the substrate 10, which is perpendicular to both the first and second sides. For example... Figure 2 As shown in Figure Z, the structure of the air conditioner control board clearly demonstrates that key components such as the power filter circuit 20, PFC circuit 30, compressor drive circuit 50, and fan drive circuit 40 are equipped with specific power devices, such as IGBTs and MOSFETs. The arrangement and position of these power devices on the substrate 10 have a decisive impact on the performance and efficiency of the entire circuit. By arranging these power devices sequentially and orderly along the third side of the substrate 10, the circuit layout can be effectively improved, mutual interference between circuits can be significantly reduced, and the heat dissipation efficiency of the power devices can be improved. This layout not only enhances the stability and reliability of the entire air conditioner control board but also provides great convenience in maintaining and replacing power devices, thereby improving the maintainability of the air conditioner control board. In practical applications, this optimized layout design can better adapt to the installation space and performance requirements of various air conditioner models.

[0061] Optionally, refer to Figure 3 Another embodiment of this utility model provides an air conditioner control board, based on the above... Figure 2 In the embodiment shown, the air conditioner control board further includes a radiator 80, wherein:

[0062] The heat sink 80 is disposed on the power devices of the fan drive circuit 40, the compressor drive circuit 50, the PFC circuit 30, and the power supply filter circuit 20.

[0063] The radiator 80 can take the form of heat dissipation fins, heat sinks, cooling fans or other heat dissipation devices. Its core function is to efficiently conduct and dissipate the heat generated by the power devices during operation, so as to avoid overheating of the devices and ensure the stable operation of the air conditioner control board.

[0064] In this embodiment, the radiator 80 is designed to be in close contact with the power devices of the fan drive circuit 40, compressor drive circuit 50, PFC circuit 30, and power filter circuit 20 to maximize heat dissipation efficiency. This design not only improves the heat dissipation performance of the air conditioner control board but also extends the lifespan of the power devices and reduces the failure rate caused by overheating. Furthermore, the rational layout of the radiator 80 also helps to reduce the overall size of the air conditioner control board, meeting the trend of miniaturization.

[0065] Optionally, refer to Figure 4 Another embodiment of this utility model provides an air conditioner control board, based on the above... Figure 1 In the embodiment shown, the signal line 11 and ground line of the switching power supply circuit 60 are arranged close to each other on the substrate 10; the signal line 11 and ground line of the PFC circuit 30 are arranged close to each other on the substrate 10; and the signal line 11 and ground line of the power filter circuit 20 are arranged close to each other on the substrate 10.

[0066] Figure 4 It can be a partial circuit layout of the switching power supply circuit 60, a partial circuit layout of the PFC circuit 30, or a partial circuit layout of the power filter circuit 20; wherein, by placing the signal lines of the switching power supply circuit 60, the signal lines of the PFC circuit 30, and the signal lines of the power filter circuit 20 close to the ground line, a configuration can be constructed as follows: Figure 4 The minimum current loop of the switching power supply circuit 60, the minimum current loop of the PFC circuit 30, or the minimum current loop of the power supply filter circuit 20 shown in Figure X.

[0067] The minimum current loop 11 design refers to a circuit layout with the shortest current path, aiming to reduce resistive losses and electromagnetic interference in the circuit. By carefully adjusting the component layout in the switching power supply circuit 60, the power factor correction (PFC) circuit, and the power filter circuit 20, the current flow on the substrate 10 is ensured to be as direct as possible, thereby achieving the goals of reducing losses and improving efficiency. The minimum current loop 11 design not only helps improve the energy efficiency of the air conditioner control board but also reduces the heat generated by the circuit, enhancing the stability and reliability of the air conditioner control board. Furthermore, the optimized layout of the minimum current loop 11 allows the air conditioner control board to maintain high-performance operation while achieving miniaturization, meeting the stringent requirements of modern air conditioners for control boards.

[0068] Optionally, refer to Figure 5 In another embodiment of this utility model, an air conditioner control board is provided, based on the above... Figure 1 In the embodiment shown, the PFC circuit 30 includes a PFC inductor 31 and a high-voltage capacitor 32; the PFC inductor 31 is disposed close to the power filter circuit, and the high-voltage capacitor 32 is located on the substrate on the side of the PFC inductor 31 facing away from the power filter circuit. The fan drive circuit, the switching power supply circuit, and the compressor drive circuit surround the high-voltage capacitor 32.

[0069] The PFC inductor 31 stores and releases energy to improve the current waveform and reduce harmonic distortion. The high-voltage capacitor 32 stabilizes the output voltage of the PFC circuit 30, ensuring circuit stability and efficiency. By placing the PFC inductor 31 close to the power supply filter circuit, the connection path between the inductor and the power supply can be shortened, reducing the length of the inductor coil, thereby reducing the DC resistance and AC impedance of the inductor and improving the circuit's response speed and efficiency. Furthermore, the placement of the high-voltage capacitor 32 allows it to form a compact circuit unit with the PFC inductor 31, facilitating connection with other circuit components such as the fan drive circuit, switching power supply circuit, and compressor drive circuit, thus better optimizing the overall layout of the air conditioner control board.

[0070] Furthermore, the arrangement of the PFC inductor 31 close to the power supply filter circuit and the high-voltage capacitor 32 on the substrate on the side of the PFC inductor 31 facing away from the power supply filter circuit can, on the one hand, avoid the electromagnetic radiation influence of the inductor on the fan drive circuit, the switching power supply circuit, and the compressor drive circuit. On the other hand, the capacitor occupies a relatively smaller volume on the board than the inductor, leaving more space for the fan drive circuit, the switching power supply circuit, and the compressor drive circuit to be arranged around the capacitor.

[0071] Optionally, the PFC circuit 30 further includes an IGBT 34 and a diode 33; the PFC inductor 31 and the high-voltage capacitor 32 are disposed in the middle of the substrate, and the diode 33, the IGBT 34, the compressor drive circuit, the control circuit, the switching power supply circuit and the power filter circuit are arranged around the PFC inductor 31 and the high-voltage capacitor 32.

[0072] The IGBT34 can be used as a power switching device to achieve rapid current control. The PFC inductor 31 is used to smooth the current waveform and reduce current ripple. The fast recovery diode 33 allows current to flow in one direction, improving circuit efficiency.

[0073] By placing the PFC inductor 31 and high-voltage capacitor 32 in the center of the substrate, and arranging IGBT 34, diode 33, compressor drive circuit, control circuit, switching power supply circuit, and power filter circuit around the PFC inductor 31 and high-voltage capacitor 32, tight connection and efficient operation between circuit components can be achieved. The integrated layout of IGBT 34 and diode 33 helps reduce switching losses in the circuit, while the stabilizing effect of high-voltage capacitor 32 ensures the voltage quality of the PFC circuit 30 output. This layout not only improves the power conversion efficiency of the air conditioner control board but also enhances its adaptability to voltage fluctuations from the external power supply, thereby improving overall energy efficiency. Furthermore, by optimizing the layout of circuit components, the size of the air conditioner control board can be further reduced, meeting the requirements for miniaturization and high integration of the air conditioner control board.

[0074] Optionally, refer to Figure 6 Another embodiment of this utility model provides an air conditioner control board, based on the above. Figure 1 In the embodiment shown, the substrate 10 is further provided with an interface circuit 90, wherein:

[0075] The interface circuit 90 is located on the side of the substrate 10, and the interface circuit 90 is located close to the control circuit 70.

[0076] The interface circuit 90 can be a terminal block, connector or other interface form. Its main function is to provide an interface for the control board to communicate with external devices, or to connect the power filtering circuit 20 of the base plate 10 to the external circuit, and to connect the fan drive circuit 40 and the compressor drive circuit 50 to the external fan or compressor, thereby realizing the signal and power exchange between the air conditioner control board and the external device.

[0077] In this embodiment, the interface circuit 90 is designed on one edge of the substrate 10 to reduce interference from these high-power circuits on signal transmission, while facilitating connection to an external power supply or external devices. Furthermore, by electrically connecting the interface circuit 90 to the control circuit 70, the stability and reliability of signal transmission can be ensured, while also facilitating the integration of the air conditioner control board with other system components. In addition, the layout of the interface circuit 90 also considers ease of maintenance and upgrades, giving the air conditioner control board greater flexibility and scalability in practical applications.

[0078] Optionally, refer to Figure 7 Another embodiment of this utility model provides an air conditioner control board, based on the above... Figure 1 In the embodiment shown, the substrate 10 is provided with a main ground line 12, wherein:

[0079] The main ground line 12 is connected in parallel at a single point to the fan drive circuit 40, the switching power supply circuit 60, the control circuit 70, the PFC circuit 30, the compressor drive circuit 50, and the power filter circuit 20.

[0080] The ground wires of the fan drive circuit 40, the switching power supply circuit 60, the control circuit 70, the PFC circuit 30, the compressor drive circuit 50, and the power filter circuit 20 are all connected to the main ground wire 12. This is a single-point parallel grounding strategy, which effectively reduces the potential difference between different circuits, thereby reducing electromagnetic interference (EMI), noise, and signal distortion. This grounding method achieves this by connecting all points that need to be grounded to a common grounding point, thus ensuring that the entire air conditioner control board has only one unified reference potential.

[0081] By using a single-point parallel connection of the main ground wire 12, mutual interference between signals of different frequency bands can be effectively prevented, ground loops and conducted coupling interference can be reduced, thereby improving the stability and anti-interference capability of signal transmission. The parallel single-point grounding system has a relatively simple structure, which facilitates the control of conducted coupling interference, avoids interference current and voltage in the signal system, and reduces low-frequency noise in the grounding system. At the same time, the setting of the main ground wire 12 helps to ensure the consistency of potential between various circuit modules, thereby enhancing the electromagnetic compatibility of the entire air conditioner control board.

[0082] When designing the main ground wire 12, a wider copper foil or strip is typically selected to reduce resistance and increase current carrying capacity, ensuring that the control board's performance is not affected under high-current operating conditions. This optimized design not only improves the performance of the air conditioner control board but also demonstrates greater stability and durability during long-term operation.

[0083] Optionally, refer to Figure 8Another embodiment of this utility model provides an air conditioner control board, based on the above... Figure 1 In the embodiment shown, the length of the substrate 10 is no greater than 220 mm, and the width of the substrate 10 is no greater than 138.5 mm.

[0084] To achieve full miniaturization, the air conditioner control board is designed to be no larger than 220mm in length and 138.5mm in width. This design not only facilitates the housing of the circuit components but also allows for easy integration into different air conditioner models, ensuring good compatibility for both residential and commercial use. Furthermore, it helps reduce material consumption and lower production costs while maintaining the control board's high performance and reliability.

[0085] Please refer to Figure 9 An embodiment of this utility model also proposes an air conditioner, which includes an indoor unit 100, an outdoor unit 110 and an electrical control box 120. The electrical control box 120 includes an air conditioner control board as described in the above embodiment. The air conditioner control board is electrically connected to the indoor unit 100 and the outdoor unit 110 respectively, and is used to control the operation of the indoor unit 100 and the outdoor unit 110 respectively.

[0086] It is worth noting that since the air conditioner of this utility model is based on the air conditioner control board described above, the embodiments of the air conditioner of this utility model include all the technical solutions of all the embodiments of the air conditioner control board described above, and the technical effects achieved are exactly the same, so they will not be repeated here.

[0087] Optionally, the air conditioner is an integrated kitchen air conditioner, with its indoor unit 100 and outdoor unit 110 designed as a whole, sharing a single electrical control board and electrical control box 120 structure.

[0088] In this embodiment of the air conditioner, the indoor unit 100 and the outdoor unit 110 are controlled by a single air conditioner control board, achieving efficient operation and energy saving. Because they share a single control board and control box 120, this integrated design ensures that all parts of the air conditioner work in coordination, improving the overall energy efficiency ratio.

[0089] Optionally, refer to Figure 10 Another embodiment of this utility model provides an air conditioner based on the above. Figure 9 In the embodiment shown, the indoor unit 100 and the outdoor unit 110 are integrated. The indoor unit 100 is provided with a first air duct 101, and the electrical control box 120 is located on the airflow path of the first air duct 101.

[0090] The electrical control box 120 is positioned along the airflow path of the first air duct 101. This placement allows the airflow generated by the indoor unit 100 during heat dissipation to simultaneously cool the electrical control box 120, effectively extending its lifespan and improving its stability. Furthermore, this layout design ensures effective cooling of the electrical control box 120 during air conditioner operation, guaranteeing stable operation of its internal electronic components and extending their lifespan.

[0091] Optionally, refer to Figure 11 Another embodiment of this utility model provides an air conditioner control board, based on the above... Figure 10 In the embodiment shown, the electrical control box 120 is located at the air inlet of the first air duct 101, and the electrical control box 120 has a heat dissipation air duct 121, which is connected to the first air duct 101.

[0092] The control box 120 includes a cover 123, on which a heat dissipation duct 121 is constructed for heat dissipation of the heat sink of the air conditioner control board. Furthermore, the cover 123 has a heat dissipation notch in the middle area, exposing the sheet metal of the control box 120 on the inside. This notch faces the main heat-generating components (such as large inductors and capacitors) on the main control board. The exposed sheet metal of the cover 123 here can conduct airflow through the cavity of the control box 120 for heat dissipation.

[0093] The negative pressure created by the rotation of the inner fan of the indoor unit 100 draws air through the air inlet of the control box cover 123, through the radiator, and then through the cooling duct 121 on the left side of the control box 120, before being drawn into the evaporator of the indoor unit 100. The control box cover 123 can have air inlets on both the front and side of the radiator to increase the air intake area. The horizontal width of the cooling duct 121 on the left side of the control box 120 must exceed 3mm to ensure an effective air intake area and achieve ideal heat dissipation.

[0094] Optionally, refer to Figure 12 Another embodiment of this utility model provides an air conditioner control board, based on the above... Figure 9 In the embodiment shown, the air conditioner includes a front panel 140, wherein:

[0095] The front cover 140 has a display side and a mounting side facing away from the display side. The indoor unit 100 and the outdoor unit 110 are respectively located on the mounting side of the front cover 140. The electrical control box 120 is installed on the side of the indoor unit 100 near the outdoor unit 110 and is located close to the front cover.

[0096] The four corners of the front panel 140 can be equipped with lifting lugs to suspend the air conditioner from the concrete ceiling within the kitchen ceiling. An air outlet can be located on the display side of the front panel 140 and connected to the indoor unit 100. Cool air from the indoor unit 100 is blown directly down from the air outlet of the front panel 140 via a centrifugal fan. Furthermore, by installing the electrical control box 120 on the side of the indoor unit 100 closest to the outdoor unit 110 and adjacent to the front panel, maintenance of the air conditioner control board can be performed without removing the main unit from the ceiling. This eliminates the need to remove the entire electrical control box 120 assembly, as well as the entire air conditioner unit and its top cover.

[0097] It's important to understand that existing air conditioner control boards and their radiators are assembled directly facing the evaporator, with all wiring terminals also facing the evaporator side. This makes it easier to dissipate heat from the evaporator's air intake to the control board's radiator, and the radiator's airflow duct is relatively simpler. However, this assembly method for the air conditioner control board presents significant manufacturing challenges. Because the control board's connectors face inwards, wiring cannot be performed after assembly. Therefore, the control board must be laid flat on the production line for wiring and terminal connection operations. Then, the control box 120 and its cover 123 are assembled together and mounted onto the complete unit. This results in excess wire length from the electrical components in the air conditioner, requiring wire management. When there are many wires, this wire management becomes a manufacturing challenge and bottleneck. In addition, when the product is being repaired, the entire electrical control box 120 needs to be removed from the kitchen ceiling to perform repairs on the main control board. Disassembling the electrical control box 120 in such a narrow space as the ceiling is not very convenient or easy to do.

[0098] To address the aforementioned pain points, this utility model also provides an air conditioner control board in one embodiment, based on the above... Figure 9 The illustrated embodiments, and in conjunction with Figure 13 The air conditioner control board includes an interface circuit, and the side of the air conditioner control board with the interface circuit is located away from the indoor unit 100.

[0099] The wiring of the air conditioner control board is mainly divided into three directions. First, the wires on the indoor unit 100 side are directly connected to the inside of the main unit from the wire clip position inside the electrical control box 120. Second, the wires on the outdoor unit 110 side are routed from the wire clip position inside and outside the electrical control box 120, and then run down along the wiring channel on the side of the electrical control box 120 near the outdoor unit 110, to the bottom of the electrical control box 120 facing the outdoor unit 110, to connect to the outside of the main unit. Third, the power supply terminal 130 of the air conditioner control board comes out from the side of the electrical control box 120 away from the outdoor unit 110, and does not come out from the same outlet as the signal wires on the air conditioner control board, so as to reduce electromagnetic interference between the power supply terminal 130 and the signal wires.

[0100] Optionally, the air conditioner control board has a second side and a fourth side adjacent to each other, the second side of the air conditioner control board being away from the housing 140, and the fourth side of the air conditioner control board being close to the outdoor unit, and the interface circuit 90 being located at the junction of the second side and the fourth side of the air conditioner control board.

[0101] The interface circuit 90 may include multiple interfaces for connecting various functional modules of the air conditioner, such as temperature sensors, pressure sensors, and user interfaces. Through these interface circuits 90, the air conditioner control board can receive data from the sensors and control the air conditioner's operating status based on this data. Furthermore, the interface circuit 90 is also responsible for sending control signals to actuators, such as the compressor and fan, to achieve precise control of the air conditioner.

[0102] In the air conditioner control board of this utility model, the layout design of the interface circuit 90 located at the adjacent points on the second and fourth sides of the air conditioner control board takes into account signal stability and anti-interference capability. The various interfaces of the interface circuit 90 are reasonably distributed on the second and fourth sides of the control board to reduce crossing and interference between signal lines.

[0103] Optionally, refer to Figure 14 and Figure 15 Another embodiment of this utility model provides an air conditioner control board, based on the above. Figure 13 In the embodiment shown, the control box includes a control box base 122. The control box base 122 has an inner cable outlet buckle 1221, an outer cable outlet buckle 1222, and an outer cable routing groove 1223 on the fourth side near the air conditioner control board. The inner cable outlet buckle 1221 is used to guide the wiring harness of the interface circuit to the indoor unit. The outer cable outlet buckle 1222 is used to guide the wiring harness of the interface circuit to the outer cable routing groove 1223, and then to the outdoor unit through the outer cable routing groove 1223.

[0104] The control box base 122 is a robust component made of metal or plastic, designed to support and secure the air conditioner control board. The shape of the control box base 122 matches the contour of the air conditioner control board, ensuring a secure mounting. The control box base 122 has multiple mounting holes for securing the air conditioner control board to the base with screws or other fasteners, ensuring the stability and reliability of the internal components of the control box.

[0105] The inner cable exit clip 1221 is a structure designed to facilitate the organization and guidance of wire harnesses, ensuring their neatness and orderliness within the electrical control box. Through the inner cable exit clip 1221, the wire harness can be neatly guided to the indoor unit 100, while the outer cable exit clip 1222 and the outer cable routing channel 1223 allow the wire harness to exit from the electrical control box 120 and safely reach the outdoor unit 110 along the outer cable routing channel 1223. This design not only improves the efficiency of wire harness management but also reduces the risk of tangling and wear inside the electrical control box, thereby enhancing the stability and reliability of the entire air conditioning system.

[0106] Optionally, refer to Figure 16 Another embodiment of this utility model provides an air conditioner control board, based on the above... Figure 14 In the embodiment shown, the electrical control box base 122 has a power cord outlet 1224 on the side near the faceplate 140.

[0107] The power cord outlet 1224 is located on the side of the control box base 122 near the front cover 140, serving to separate the wiring from the indoor and outdoor units, thus simplifying the internal wiring process of the air conditioner. The design of the power cord outlet 1224 allows the power cord to be directly led out from the control box base 122 and connected to external AC power or other power supplies without requiring complex wiring paths. This design not only improves wiring efficiency but also reduces the risk of malfunctions due to improper wiring. Furthermore, the placement of the power cord outlet 1224 effectively prevents electromagnetic interference from the power cord from affecting the signal quality of the signal lines in the indoor and outdoor units, ensuring the stable operation of the air conditioner as a whole.

[0108] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An air conditioner control board, characterized in that, The air conditioner control board includes: The base plate is equipped with a fan drive circuit, a switching power supply circuit, a control circuit, a PFC circuit, a compressor drive circuit, and a power filter circuit. The input terminal of the PFC circuit is connected to the power filter circuit, and the output terminal of the PFC circuit is electrically connected to the fan drive circuit, the switching power supply circuit and the compressor drive circuit respectively. The control circuit is electrically connected to the fan drive circuit and the compressor drive circuit respectively. The substrate has a first side and a second side opposite to each other. The power filter circuit and the PFC circuit are arranged sequentially and adjacent to each other from the first side to the second side. The fan drive circuit, the switching power supply circuit and the compressor drive circuit are arranged around the PFC circuit. The control circuit is located between the switching power supply circuit and the fan drive circuit.

2. The air conditioner control board as described in claim 1, characterized in that, The substrate has a third side, which is adjacent to the first side and the second side. The power devices of the power supply filter circuit, the power devices of the PFC circuit, the power devices of the compressor drive circuit, and the power devices of the fan drive circuit are arranged sequentially along the third side of the substrate.

3. The air conditioner control board as described in claim 2, characterized in that, The air conditioner control panel also includes: A heat sink is disposed on the power devices of the fan drive circuit, the compressor drive circuit, the PFC circuit, and the power supply filter circuit.

4. The air conditioner control board as described in claim 1, characterized in that, The signal lines and ground lines of the switching power supply circuit are arranged close together on the substrate; the signal lines and ground lines of the PFC circuit are arranged close together on the substrate; the signal lines and ground lines of the power filter circuit are arranged close together on the substrate.

5. The air conditioner control board as described in claim 1, characterized in that, The PFC circuit includes a PFC inductor and a high-voltage capacitor; the PFC inductor is disposed close to the power supply filter circuit, and the high-voltage capacitor is located on the side of the PFC inductor facing away from the power supply filter circuit on the substrate; the fan drive circuit, the switching power supply circuit, and the compressor drive circuit surround the high-voltage capacitor.

6. The air conditioner control board as described in claim 5, characterized in that, The PFC circuit also includes an IGBT and a diode; the PFC inductor and the high-voltage capacitor are located in the middle of the substrate, and the diode, the IGBT, the compressor drive circuit, the control circuit, the switching power supply circuit, and the power filter circuit are arranged around the PFC inductor and the high-voltage capacitor.

7. The air conditioner control board as described in claim 1, characterized in that, The substrate is also provided with an interface circuit, which is located on the side of the substrate and close to the control circuit.

8. The air conditioner control board as described in claim 1, characterized in that, The substrate is provided with a main ground line, which is connected in parallel at a single point to the fan drive circuit, the switching power supply circuit, the control circuit, the PFC circuit, the compressor drive circuit, and the power filter circuit.

9. The air conditioner control board as described in claim 1, characterized in that, The length of the substrate is no greater than 220 mm, and the width of the substrate is no greater than 138.5 mm.

10. An air conditioner, characterized in that, The air conditioner includes an indoor unit, an outdoor unit, and an electrical control box, wherein the electrical control box includes an air conditioner control board as described in any one of claims 1 to 9.

11. The air conditioner as described in claim 10, characterized in that, The indoor unit and the outdoor unit are integrated, the indoor unit is provided with a first air duct, and the electrical control box is located on the airflow path of the first air duct.

12. The air conditioner as described in claim 11, characterized in that, The electrical control box is located at the air inlet of the first air duct, and the electrical control box has a heat dissipation air duct that is connected to the first air duct.

13. The air conditioner as described in claim 10, characterized in that, The air conditioner includes a front panel, which has a display side and a mounting side facing away from the display side, and the indoor unit and the outdoor unit are respectively disposed on the mounting side of the front panel; The electrical control box is installed on the side of the indoor unit closer to the outdoor unit and adjacent to the front cover.

14. The air conditioner as described in claim 13, characterized in that, The air conditioner control board includes an interface circuit, and the side of the air conditioner control board with the interface circuit is located away from the indoor unit.

15. The air conditioner as described in claim 14, characterized in that, The air conditioner control board has a second side and a fourth side adjacent to each other. The second side of the air conditioner control board is away from the front cover, and the fourth side of the air conditioner control board is close to the outdoor unit. The interface circuit is located at the junction of the second side and the fourth side of the air conditioner control board.

16. The air conditioner as described in claim 15, characterized in that, The electrical control box includes an electrical control box base. The electrical control box base has an inner cable outlet buckle, an outer cable outlet buckle, and an outer cable routing groove on the fourth side near the air conditioner control board. The inner cable outlet buckle is used to guide the wiring harness of the interface circuit to the indoor unit, and the outer cable outlet buckle is used to guide the wiring harness of the interface circuit to the outer cable routing groove, and then to the outdoor unit through the outer cable routing groove.

17. The air conditioner as described in claim 16, characterized in that, The base of the electrical control box has a power cord outlet on the side near the front shell.

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