Control panel of indoor unit, electric control box and indoor unit

Abstract

The utility model discloses a control panel of an indoor unit, an electric control box and the indoor unit, the control panel comprises a strong current circuit and a weak current circuit, the strong current circuit and the weak current circuit are connected through in-board wiring, the strong current circuit and the weak current circuit are actually integrated on one PCB, and an original connecting line between the strong current circuit and the weak current circuit is saved; in order to facilitate assembly, the components of the strong current circuit are arranged on the front surface of the control panel, and the socket of the weak current circuit is arranged on the back surface of the control panel, so that when the control panel is mounted in the electric control box, the components of the strong current circuit are accommodated in the inner cavity of the electric control box, which is originally used for mounting the strong current board; therefore, the socket of the weak current circuit can face assembling personnel, the assembling personnel can connect the wiring of the weak current circuit conveniently, and the assembling efficiency of the control panel of the electric control box device can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic circuits, and in particular to a control panel of an indoor unit, an electric control box and the indoor unit. BACKGROUND

[0002] At present, indoor wall-mounted air conditioners are developing in the direction of miniaturization, and the machine body usually needs to accommodate a fresh air system, an electric control box and an indoor fan motor. Among them, two circuit boards, a strong current board and a weak current board, are arranged in the electric control box, the strong current board is responsible for connecting strong current equipment such as the fresh air system and the indoor fan motor, and the weak current board is responsible for bearing chips and components of the electric control part. In order to realize the separation of strong and weak current, the strong current board and the weak current board are currently separated and arranged in the installation structure of the electric control box. When the factory is assembled, the strong current board and the weak current board need to be installed into the electric control box respectively, and each device is connected to the corresponding board. Finally, the connecting line between the strong current board and the weak current board needs to be installed, and the assembly efficiency is not high enough. CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the present application provide a control panel of an indoor unit, an electric control box and the indoor unit, which can improve the assembly efficiency of assembling the control panel into the electric control box.

[0004] In a first aspect, the embodiments of the present application provide a control panel of an indoor unit, the control panel being used for being installed into an electric control box of the indoor unit, the control panel comprising a strong current circuit and a weak current circuit, and the control panel further comprising:

[0005] a first area, the first area being arranged with the strong current circuit;

[0006] a second area, the second area being arranged with the weak current circuit;

[0007] The first area and the second area are independent of each other, the strong current circuit and the weak current circuit are connected through in-panel wiring of the control panel; components of the strong current circuit are arranged on the front surface of the control panel, at least one socket of the weak current circuit is arranged on the back surface of the control panel, and the control panel is installed into the electric control box in a manner that the front surface faces the inner cavity of the electric control box.

[0008] In some embodiments, the components of the strong current circuit comprise a busbar electrolytic capacitor, and the busbar electrolytic capacitor is arranged close to the edge of the second area.

[0009] In some embodiments, the components of the strong current circuit further comprise a transformer, and the transformer is arranged close to the same edge of the second area as the busbar electrolytic capacitor.

[0010] In some embodiments, the weak current circuit comprises a master chip and a plurality of the sockets, the plurality of the sockets are arranged around the position where the master chip is located, and components of the weak current circuit are arranged between the sockets and the master chip.

[0011] In some embodiments, the master chip is located in the middle of the first area, and the plurality of the sockets are arranged along the edge of the first area.

[0012] In some embodiments, the strong current circuit comprises a three-phase AC socket, and the three-phase AC socket is arranged on the back of the control panel.

[0013] In the second aspect, the embodiments of the present application further provide an electric control box for mounting the control panel of the first aspect.

[0014] In some embodiments, the electric control box comprises a receiving part and a mounting part, the receiving part is formed with an inner cavity to accommodate components of the strong current circuit, and the mounting part is used to fix the first area of the control panel.

[0015] In some embodiments, the mounting part comprises a plurality of buckles, and the buckles are arranged along the edge of the first area.

[0016] In the third aspect, the embodiments of the present application further provide an indoor unit comprising the control panel of the first aspect and the electric control box of the second aspect.

[0017] The control panel of the indoor unit, the electric control box and the indoor unit of the embodiments of the present application have at least the following beneficial effects: the control panel comprises a strong current circuit and a weak current circuit, the strong current circuit and the weak current circuit are connected through in-panel wiring, in fact, the two parts of the strong current board and the weak current board are integrated into one PCB board, thus saving the connection line between the original strong current board and the weak current board; in order to facilitate assembly, the components of the strong current circuit are arranged on the front of the control panel, and the sockets of the weak current circuit are arranged on the back of the control panel, so that when the control panel is installed into the electric control box, the inner cavity of the electric control box originally used for mounting the strong current board accommodates the components of the strong current circuit, and then the sockets of the weak current circuit can face the assembly personnel, facilitating the assembly personnel to connect the wiring of the weak current circuit, thus the assembly efficiency of the electric control box device control panel can be improved.

[0018] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and obtained by means of the structures particularly pointed out in the description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of the internal structure of an indoor wall-mounted air conditioner provided by the embodiments of the present application.

[0020] Figure 2 is a structural schematic diagram of an electric control box provided by an embodiment of the present application;

[0021] Figure 3 is a front circuit layout schematic diagram of a control board provided by an embodiment of the present application;

[0022] Figure 4 is a back circuit layout schematic diagram of a control board provided by an embodiment of the present application.

[0023] Reference signs:

[0024] First region 100, second region 200, bus electrolytic capacitor 110, transformer 120, three-phase AC socket 130, socket 210, main control chip 220, electric control box 300, accommodating cavity 310, mounting portion 320, buckle 321 DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application. In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be sequentially changed or adjusted in a manner that is apparent to those skilled in the art. Therefore, the order in the specification and the drawings is only for the purpose of clearly describing a certain embodiment, and does not mean that it is the necessary order, unless otherwise stated that a certain order must be followed.

[0026] In the description of the present application, one or more is meant to be one or more, more than two is meant to be two or more, greater than, less than, more than, etc. are understood to not include the number, above, below, etc. are understood to include the number. If it is described as first, second, it is only used to distinguish the technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0027] In this paper, the serial number of the component itself, such as "first", "second", etc., is only used to distinguish the described object, and does not have any order or technical meaning. Unless otherwise specified, the "connection" and "coupling" in the present application include direct and indirect connection (coupling).

[0028] Indoor wall-mounted air conditioners typically include an evaporator, motor, fresh air system, and electrical control box. To reduce the length of the air conditioner, the motor, fresh air system, and electrical control box are usually located on the right side. This limits the size of the electrical control box, increasing the difficulty of assembling the control board inside. To separate high-voltage and low-voltage circuits, the control board generally consists of two boards: a high-voltage board and a low-voltage board. The high-voltage board handles the high-voltage circuitry, connecting the DC motor of the fresh air system, the DC motor of the indoor fan, and the three-phase AC input. The low-voltage board handles the low-voltage circuitry, housing the main control chip, connecting sensors, display components, and handling communication with the high-voltage board. However, additional wiring is required between the high-voltage and low-voltage boards, including communication lines and control lines from the low-voltage board to the high-voltage board (e.g., relay control lines, DC motor control lines, etc.). Furthermore, the high-voltage and low-voltage boards themselves also require external cable connections, resulting in a large number of cables within the electrical control box. Therefore, assembling the control box would be difficult and time-consuming.

[0029] Based on this, embodiments of this application provide a control board, an electrical control box, and an indoor unit. The control board includes high-voltage circuits and low-voltage circuits, which are connected by internal wiring. In effect, the high-voltage and low-voltage circuits are integrated onto a single PCB, saving the original connecting wires between them. For ease of assembly, the high-voltage circuit components are placed on the front of the control board, while the low-voltage circuit sockets are placed on the back. When the control board is installed into the electrical control box, the internal cavity of the box, originally used for the high-voltage circuit, accommodates the high-voltage circuit components, allowing the low-voltage circuit sockets to face the assembly personnel, facilitating the connection of the low-voltage circuit wiring. This improves the assembly efficiency of the control board within the electrical control box.

[0030] The control board, electrical control box, and indoor unit of the indoor unit are described below with reference to the accompanying drawings:

[0031] Reference Figure 1 The diagram shows the internal structure of an indoor wall-mounted air conditioner. The evaporator and cross-flow fan body are located on the left side. Figure 1 (Represented by number 1), the right side houses the DC motor of the cross-flow fan, the DC motor of the fresh air system, and the duct assembly, etc. Figure 1 (represented by number 2) and the electrical control box ( Figure 1 (Represented by reference numeral 3), this structural layout reduces the length of the indoor wall-mounted air conditioner. The size of the control box is limited, and it is located between the fresh air system and the evaporator. The general structure of the control box is referenced... Figure 2As shown, the upper part of the electric control box 300 is longitudinally deep, and is provided with a containing cavity 310 capable of mounting a strong current board, and the purpose is to be compatible with large height devices such as electrolytic capacitors on the strong current board. The lower part of the electric control box 300 is a mounting part 320 capable of mounting a weak current board, and is used to fix the weak current board so that the front face thereof faces the assembly personnel, and the assembly personnel can connect various cables on the front face of the weak current board.

[0032] Referring to Figure 3 and Figure 4 are respectively a circuit board schematic diagram of the front face and the back face of the control board of the embodiment, the control board is used to be mounted to the electric control box 300 of the indoor unit, and the control board comprises a strong current circuit and a weak current circuit: the control board further comprises:

[0033] a first area 100, the first area 100 is provided with the strong current circuit;

[0034] a second area 200, the second area 200 is provided with the weak current circuit;

[0035] The first area 100 and the second area 200 are independent of each other, and the strong current circuit and the weak current circuit are connected through in-board wiring of the control board; the components of the strong current circuit are arranged on the front face of the control board, at least one socket of the weak current circuit is arranged on the back face of the control board, and the control board is mounted to the electric control box 300 in a manner that the front face faces the inner cavity of the electric control box 300.

[0036] The control board is divided into two parts in the directions of Figure 3 and Figure 4 , the upper part is the first area 100 provided with the strong current circuit, and the lower part is the second area 200 provided with the weak current circuit, the first area 100 and the second area 200 are independent of each other and are separated by a distance, and the strong current circuit and the weak current circuit are connected through in-board wiring of the control board. Among them, the components of the strong current circuit are arranged on the front face of the control board, mainly including a bus electrolytic capacitor 110, a transformer 120, a heat dissipation module and other high components, and other capacitors, triodes, MOS tubes, inductors and other low components; at least one socket of the weak current circuit is arranged on the back face of the control board, in order to facilitate the back plug connection, all sockets of the weak current circuit can be arranged on the back face of the control board, and these sockets mainly include sockets of a stepping motor, sockets of a display module, sockets of an indicator light and the like. Therefore, the control board of the embodiment is a strong and weak current integrated double-sided layout or double-sided SMT circuit board.

[0037] When the control board is installed into the electric control box 300, the components of the strong current circuit on the front surface of the control board are installed into the accommodating cavity 310 of the control board, so that the weak current part on the back surface of the control board faces outward. The accommodating cavity 310 of the control board can accommodate the components of the strong current circuit with a relatively large height, and at the same time, the socket located on the back surface of the control board is exposed, facilitating the wiring of the assembly personnel on the weak current board. Since the strong current circuit and the weak current circuit are both arranged on one PCB, the assembly personnel does not need to connect the connecting line between the strong current board and the weak current board, thereby simplifying the assembly process and improving the assembly efficiency.

[0038] It can be understood that the first region 100 and the second region 200 of the present application actually belong to a three-dimensional region, and the region includes the surface and the inside of the control board, and the first region 100 and the second region 200 can be irregular. A relatively obvious region division manner is to divide according to the circuit to which the components on the surface of the control board belong. The components belonging to the strong current circuit are divided into the first region 100, and the components belonging to the weak current circuit are divided into the second region 200. Another feasible region division manner is to mark different regions on the control board by silk printing.

[0039] In some embodiments, the components of the strong current circuit include a bus electrolytic capacitor 110, and the bus electrolytic capacitor 110 is arranged close to the edge of the second region 200.

[0040] The bus electrolytic capacitor 110 of the strong current board is the largest component on the control board, and it is necessary to consider whether the electric control box 300 can be installed into the bus electrolytic capacitor 110. The size of the cavity opening of the accommodating cavity 310 of the original electric control box 300 is designed to be compatible with the width of the strong current board and the height of the bus electrolytic capacitor 110, and the length of the strong current board corresponds to the depth of the accommodating cavity 310 of the electric control box 300. In the embodiment of the present application, the components of the strong current circuit of the control board are inverted into the accommodating cavity 310, so the depth of the accommodating cavity 310 corresponds to the height of the component. In the embodiment, the bus electrolytic capacitor 110 is arranged at the edge of the second region 200, which facilitates the layout of the wiring in the control board and has good electrical performance, and also facilitates the assembly personnel to invert the bus electrolytic capacitor 110 into the accommodating cavity 310 of the electric control box 300 as a reference. Referring to FIGS. 1, 2 and 3, the bus electrolytic capacitor 110 is arranged at the upper left corner of the front surface of the control board. Figure 3 and Figure 4 Taking the control board as a rectangular board, the bus electrolytic capacitor 110 is located at the upper left corner of the front surface of the control board.

[0041] In some embodiments, the components of the strong current circuit further include a transformer 120, and the transformer 120 is arranged close to the same edge of the second region 200 as the bus electrolytic capacitor 110.

[0042] The transformer 120 is the second tallest component after the bus electrolytic capacitor 110, and it belongs to the switching power supply section of the high-voltage circuit. One layout method for high-voltage circuit components is to group taller components together; therefore, the transformer 120 and the bus electrolytic capacitor 110 are placed close together, as shown in the reference. Figure 3 and Figure 4 As shown, taking a rectangular control board as an example, the transformer 120 is located below the bus electrolytic capacitor 110 and near the left edge of the control board.

[0043] In some embodiments, the low-voltage circuit includes a main control chip 220 and a plurality of sockets 210, the plurality of sockets 210 being arranged around the location of the main control chip 220, and the components of the low-voltage circuit being arranged between the sockets 210 and the main control chip 220.

[0044] The main control chip 220 on the low-voltage board executes the electrical control program, which instructs the overall operation of the air conditioning system. Based on the principle of shortest routing, multiple sockets 210 are arranged around the main control chip 220, allowing the pins of the main control chip 220 to connect to the sockets 210 via shortest paths to control external devices. Besides the sockets 210, the low-voltage circuit also includes other low-voltage components, such as dedicated driver chips, control chips, small capacitors, and resistors. These components are arranged between the main control chip 220 and the sockets 210, with the pins of the main control chip 220 connected to the sockets 210 via internal wiring. (See reference...) Figure 3 and Figure 4 As shown, the main control chip 220 and the components of the low-voltage circuit are arranged on the front of the control board. In this way, the components of the high-voltage board and the low-voltage board are all surface-mounted on the front of the control board, while the sockets of the high-voltage board and the low-voltage board are all installed on the back of the control board, which can reduce the manufacturing complexity of the PCB board.

[0045] In some embodiments, the main control chip 220 is located in the center of the first region 100, and multiple sockets 210 are arranged along the edge of the first region 100. Taking a rectangular control board as an example, the first region 100 and the second region 200 are roughly rectangular areas. The main control chip 220 is arranged in the center of the first region 100, and then the other sockets 210 are arranged according to the shape of the first region 100, which actually corresponds to the package shape of the main control chip 220, so that the pins of the main control chip 220 can be routed to the sockets 210 with corresponding functions.

[0046] In some embodiments, the strong current circuit includes a three-phase AC socket 130, which is arranged on the back of the control panel. The electric control box 300 is provided with a three-phase AC power supply inlet pipe, which is located on the side of the accommodating cavity 310 of the electric control box 300. In order to facilitate wiring, the three-phase AC socket 130 is arranged on the back of the control panel, and the power supply line from the inlet pipe is conveniently assembled to the control panel.

[0047] The embodiments of the present application also provide an electric control box 300 for mounting the control panel.

[0048] Referring to Figure 2 As shown in the figure, the upper part of the electric control box 300 is a longitudinal structure, which is provided with an accommodating cavity 310, and the lower part is a mounting structure of the weak current panel, which is provided with a mounting part 320. When the control panel is mounted, the components of the strong current circuit on the front of the control panel are inverted and buckled to the accommodating cavity 310. The accommodating cavity 310 has sufficient depth to accommodate the bus electrolytic capacitor 110 and other components with large height. At the same time, the lower end of the control panel is mounted to the mounting part 320 of the electric control box 300 for fixation, so that the socket 210 of the weak current part faces the outside of the electric control box 300, which is convenient for the assembler to wire.

[0049] In some embodiments, the mounting part 320 includes a plurality of buckles 321, which are arranged along the edge of the first area 100. Taking the control panel as an example, the first area 100 and the second area 200 are substantially rectangular areas, and the mounting part 320 is provided with a plurality of buckles 321 according to the size of the first area 100. When the control panel is mounted to the electric control box 300, the edge of the first area 100 is fixed by the plurality of buckles 321. The specific structure of the buckle 321 can be set according to actual needs, for example, the buckle 321 is a long slot, and the slot width is similar to the thickness of the control panel. For another example, the buckle 321 is a flexible hook type cantilever buckle, and the left and right two flexible hook type cantilevers are used to tightly clamp the control panel in the electric control box 300.

[0050] Through the cooperation of the control panel and the electric control box 300, the assembly is facilitated, and the heat dissipation space of the components of the strong current circuit is also increased, thereby prolonging the service life of the components. Since the two sides of the components and the wiring are arranged, the whole machine wiring is facilitated, the assembly efficiency is improved, the connection line between the strong and weak current panels is reduced, and the reliability of the control panel is improved.

[0051] In conclusion, the control board includes the strong current circuit and the weak current circuit, the strong current circuit and the weak current circuit are connected through the in-board wiring, in fact, the strong current board and the weak current board are integrated into one PCB board, the connecting line between the strong current board and the weak current board is saved; in order to facilitate assembly, the components of the strong current circuit are arranged on the front surface of the control board, the socket 210 of the weak current circuit is arranged on the back surface of the control board, when the control board is installed into the electric control box 300, the components of the strong current circuit are accommodated in the original cavity of the electric control box 300 for installing the strong current board, and then the socket 210 of the weak current circuit can face the assembly personnel, the wiring of the weak current circuit is connected, and therefore the assembly efficiency of the control board of the electric control box 300 device can be improved.

[0052] The embodiment of the present application further provides an indoor unit, which comprises the control board of any of the above embodiments and the electric control box of any of the above embodiments.

[0053] It should be understood that, in the present application, "at least one" means one or more, and "multiple" means two or more. "And / or" is used to describe the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, "A and / or B" can mean that there are three cases of only A, only B and A and B at the same time, wherein A and B can be singular or plural. The character " / " generally represents that the front and rear associated objects have an "or" relationship. "At least one of the following" or similar expressions means any combination of these items, including single item or any combination of multiple items. For example, at least one of a, b or c can mean a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b and c can be single or multiple.

[0054] In several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method can be implemented in other ways. For example, the apparatus embodiments described above are only illustrative, for example, the division of units is only a logical function division, and actual implementation can have another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed units can be indirect coupling or communication connection through some interfaces, apparatuses or units, which can be electrical, mechanical or other forms. The units described as separate components can be or can not be physically separated, and the components displayed as units can be or can not be physical units, that is, they can be located in one place or distributed on multiple network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0055] It should also be understood that various embodiments provided by the embodiments of the present application can be combined to achieve different technical effects.

[0056] The above is a specific description of the preferred embodiments of the present application, but the present application is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A control board of an indoor unit, characterized by, The control board is used for mounting to an electric control box of the indoor unit, and comprises a strong current circuit and a weak current circuit. A first area is arranged with the strong current circuit; A second area is arranged with the weak current circuit; The first area and the second area are independent of each other, and the strong current circuit and the weak current circuit are connected through in-board wiring of the control board; components of the strong current circuit are arranged on a front surface of the control board, at least one socket of the weak current circuit is arranged on a back surface of the control board, and the control board is mounted to the electric control box with the front surface facing an inner cavity of the electric control box.

2. The control panel of claim 1, wherein, The components of the strong current circuit comprise a bus electrolytic capacitor, which is arranged close to an edge of the second area.

3. The control panel of claim 2, wherein, The components of the strong current circuit further comprise a transformer, which is arranged close to the same edge of the second area as the bus electrolytic capacitor.

4. The control panel of claim 1, wherein, The weak current circuit comprises a master control chip and a plurality of sockets, the plurality of sockets are arranged around a position where the master control chip is located, and components of the weak current circuit are arranged between the sockets and the master control chip.

5. The control panel of claim 4, wherein, The master control chip is located in a middle part of the first area, and the plurality of sockets are arranged along an edge of the first area.

6. The control panel of claim 1, wherein, The strong current circuit comprises a three-phase AC socket, which is arranged on the back surface of the control board.

7. An electric control box characterized by comprising: A control board as claimed in any one of claims 1 to 6 is used for mounting.

8. The electric control box according to claim 7, wherein The electric control box comprises a receiving part and a mounting part, the receiving part is formed with an inner cavity to receive components of the strong current circuit, and the mounting part is used for fixing the first area of the control board.

9. The electric control box according to claim 8, wherein The mounting part comprises a plurality of buckles, which are arranged along an edge of the first area.

10. An indoor unit, characterized by comprising: A control board as claimed in any one of claims 1 to 6 and an electric control box as claimed in any one of claims 7 to 9 are comprised.

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