Indoor unit and heating and ventilation system

Abstract

The utility model provides an indoor unit and a heating and ventilation system. The indoor unit comprises a shell, a main board support, an electric control board and a cover body. A mounting cavity is formed in the shell. The mainboard bracket is positioned in the mounting cavity and is connected with the shell; the electric control board is positioned in the mounting cavity and is connected with the main board bracket; the cover body is located in the installation cavity and connected to the shell, and the cover body and the shell define a containing cavity for containing the electric control board. The indoor unit is high in assembling efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an indoor unit and a heating and ventilation system using the indoor unit. Background Art

[0002] Embedded indoor units generally refer to indoor units installed on the ceiling, and ceiling units are more commonly used in taller buildings.

[0003] In the related art, the embedded indoor unit generally includes a shell, an electric control box and a heat exchanger. The shell includes a chassis, multiple side panels and a panel. The multiple side panels are arranged around the chassis. The panel is arranged opposite to the chassis and covers the bottom of the multiple side panels to form an installation cavity between the chassis and the multiple side panels. The electric control box includes a box body, a box cover, an insulating support plate and an electric control board. The box body is connected to the side panels, and the box cover is covered on the box body to form an accommodating cavity for accommodating the insulating support plate and the electric control board. The insulating support plate is installed on the box body to be connected to the bottom wall of the installation cavity, and the electric control board is installed on the insulating support plate.

[0004] However, in the above-mentioned embedded indoor unit, the electric control box requires more parts, and the steps are relatively complicated when assembling the electric control box and installing it on the shell, which makes the overall assembly efficiency of the embedded indoor unit low; in addition, the electric control box is installed on the side panel, which makes the disassembly and assembly of the electric control box and the wiring of the internal electric control panel inconvenient. Utility Model Content

[0005] The embodiments of the present application provide an indoor unit and a HVAC system, which are used to solve the problem of low assembly efficiency of the indoor unit in the related art.

[0006] On the one hand, the present application provides an indoor unit, including a shell, a main board bracket, an electric control board and a cover body, the shell is formed with an installation cavity; the main board bracket is located in the installation cavity and is connected to the shell; the electric control board is located in the installation cavity and is connected to the main board bracket; the cover body is located in the installation cavity and is connected to the shell, and the cover body and the shell are enclosed to form a accommodating cavity for accommodating the electric control board.

[0007] As an optional embodiment, the housing includes a panel and a casing, the bottom of the casing is open, and the panel cover is arranged at the open position to enclose the panel to form an installation cavity; the panel has a return air port and an air outlet connected to the installation cavity, and the return air port and the air outlet are arranged at intervals; wherein the cover body is exposed by either the return air port or the air outlet. In this way, when the cover body is exposed by the return air port, the airflow entering through the return air port during the operation of the fan can carry away the heat generated by the electric control board; when the cover body is exposed by the air outlet, the airflow flowing out of the air outlet during the operation of the fan can also carry away the heat generated by the electric control board. Thereby, the heat dissipation of the electric control board can be achieved, and then the heat dissipation of the electric control module can be achieved, and the use performance of the indoor unit provided by the present application can be improved; in addition, when the cover body is exposed by the return air port or the air outlet, the cover body can be seen after the panel is opened, which is convenient for disassembly of the cover body, and then it is convenient for maintenance of the main control board.

[0008] As an optional implementation, the housing includes a chassis and a plurality of side panels arranged around the chassis; the chassis and the panel are arranged opposite to each other, and the bottom surface of the chassis forms the top wall of the installation cavity, and the inner surface of the side panels forms the side walls of the installation cavity; the mainboard bracket is connected to the chassis, and the cover is connected to the chassis or the side panels. In this way, the connection convenience between the mainboard bracket and the housing is improved.

[0009] As an optional embodiment, the cover body includes a cover plate and a plurality of end caps, and the plurality of end caps are arranged around the circumference of the cover plate; the cover plate is connected to the side plate, one end of the end cap is connected to the cover plate, and the other end of the end cap extends toward the bottom plate. In this way, not only can the processing technology of the cover body be simple, the processing cost is low, but also the sealing between the cover body and the end cap can be ensured.

[0010] As an optional embodiment, the cover plate includes a covering portion and a connecting portion, and the end cover is connected to the covering portion; the first end of the connecting portion is connected to the covering portion, the second end of the connecting portion extends toward the side plate, and the connecting portion and the side plate are connected by a fastener; wherein the first end of the connecting portion is located above the second end of the connecting portion. When the first end of the connecting portion is located above the second end of the connecting portion, it means that the extending direction of the connecting portion has an angle with both the horizontal direction and the vertical direction, that is, the connecting portion extends in an inclined direction, so that the axial direction of the fastener is perpendicular to the extending direction of the connecting portion, that is, the axial direction of the fastener also has an angle with the horizontal direction and the vertical direction, so that the axial direction of the fastener can be avoided to be consistent with the horizontal direction, and further, when the operator connects the cover body and the side plate, his hand is easier to operate the third-party tool, and the hand is convenient to apply force to the third-party tool, which can improve the disassembly and assembly efficiency between the cover body and the casing.

[0011] As an optional implementation, the return air port and the cover body are arranged opposite to each other in the vertical direction. In this way, when the airflow enters through the return air port, it can directly collide with the electric control module, and can carry away more heat generated by the electric control board quickly, thereby improving the heat dissipation efficiency of the electric control board; in addition, it is convenient to disassemble the cover body, and then to repair the electric control board.

[0012] As an optional embodiment, the covering part includes a first covering body and a second covering body; the first covering body is located between the end cover and the second covering body, the second covering body is located between the first covering body and the connecting part, and the second covering body is connected to the first end of the connecting part; wherein one end of the first covering body is connected to the second covering body, and the other end of the first covering body extends upwardly and is connected to the end cover. In this way, the connection between the covering part and the end cover is not in the form of a right angle, but forms an oblique angle. Such a setting can avoid the airflow entering from the return air port to a certain extent, and avoid the influence of the setting of the cover body on the air intake to a certain extent, so that the indoor unit provided by the present application has better performance.

[0013] As an optional embodiment, the angle between the extension direction of the first covering body and the horizontal direction is greater than or equal to the angle between the flow direction of the airflow flowing in through the return air port and the horizontal direction. In this way, even if the airflow flowing in from the return air port collides with the first covering body, when the angle between the extension direction of the first covering body and the horizontal direction is equal to the angle between the flow direction of the airflow flowing in through the return air port and the horizontal direction, the first covering body can also play a certain guiding role on the flow direction of the airflow; or, when the angle between the extension direction of the first covering body and the horizontal direction is greater than the angle between the flow direction of the airflow flowing in through the return air port and the horizontal direction, the airflow can continue to flow downstream along the original direction after colliding with the first covering body.

[0014] As an optional embodiment, the cover plate further includes a flange connected to the second end of the connecting portion; the flange extends downward along the plate surface direction of the side plate and contacts the side plate. Thus, when the flange contacts the side plate, the sealing performance between the flange and the side plate is improved, thereby improving the sealing performance between the cover body and the housing.

[0015] As an optional implementation, in the length direction of the cover body, the mainboard bracket at least partially extends out of the cover body, and the end of the end cap away from the cover plate abuts against the surface of the mainboard bracket away from the chassis. In this way, the circuit safety requirements can be met.

[0016] As an optional implementation, there is at least one return air port, and the area occupied by the return air port on the panel partially overlaps with the projection area of ​​the cover on the panel. In this way, the heat dissipation efficiency of the electric control board can be further improved.

[0017] As an optional implementation, it also includes a fan and a heat exchanger, both of which are located in the installation cavity; the cover and the fan are located on opposite sides of the heat exchanger, and a water receiving tray is provided below the heat exchanger; a notch is provided on the water receiving tray to avoid the cover. In this way, through the provision of the notch, even if the electric control module in this embodiment is installed on the chassis, it will not interfere with other structures or parts.

[0018] As an optional embodiment, a wire hole is provided on the cover body, and the wire hole is used for passing the wire harness connected to the electric control board. By providing the wire hole on the end cover, the wire harness connected to the electric control board can pass through the accommodating cavity, so that the electric control board can be electrically connected to other electrical components normally.

[0019] As an optional implementation, a wire clamp is provided on the mainboard bracket, and the wire clamp is used to clamp the wire harness connected to the electric control board. In this way, the wire clamp is integrated on the mainboard bracket, which can improve the compactness of the structure of the indoor unit provided in this embodiment.

[0020] On the other hand, the present application provides a HVAC system, comprising the above-mentioned indoor unit.

[0021] In the indoor unit and HVAC system provided by the embodiment of the present application, when assembling the electric control module and the shell of the indoor unit, the main board bracket is first connected to the shell, and then the electric control board is connected to the main board bracket. Finally, the cover body is connected to the shell. Compared with the assembly method of the electric control module in the related art, since there is no box body design in the present embodiment, when assembling the electric control module provided by the present embodiment, there is no connection between the box body and the casing and the connection between the cover body and the box body, thereby reducing the number of assembly steps. Therefore, the installation time of the electric control module on the shell can be shortened, so that the overall assembly efficiency of the indoor unit provided by the present embodiment is higher; in addition, when the box body is not set, the raw materials of the entire electric control module will be less, saving costs; and when the electric control module is inspected, the cover body can be removed from the shell to inspect the electric control board, thereby improving the convenience of inspecting the electric control module. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1A three-dimensional structural diagram of a partial structure of an indoor unit provided in an embodiment of the present application;

[0024] Figure 2 for Figure 1 A structural diagram of a local structure;

[0025] Figure 3 for Figure 1 Schematic diagram of the plane structure;

[0026] Figure 4 for Figure 3 Cross-sectional view along AA direction;

[0027] Figure 5 for Figure 4 A magnified schematic diagram of the local structure at B in the middle;

[0028] Figure 6 for Figure 1 A magnified schematic diagram of the local structure at C in the middle;

[0029] Figure 7 A schematic diagram of the coordination relationship between the water receiving tray and the electric control module in the indoor unit provided in the embodiment of the present application;

[0030] Figure 8 A schematic diagram of the structure of a water receiving tray in an indoor unit provided in an embodiment of the present application.

[0031] Description of reference numerals:

[0032] 1. Casing; 2. Installation cavity; 4. Water tray; 5. Mainboard bracket; 6. Electric control board; 7. Cover; 8. Accommodation cavity; 9. Wire clamp; 10. Wire clamp;

[0033] 11. chassis; 12. side panel; 41. notch; 51. first buckle; 52. second buckle; 61. circuit board; 71. cover plate; 72. end cover; 73. wire hole;

[0034] 511, first stop surface; 512, guide slope; 521, second stop surface; 711, covering portion; 712, connecting portion; 713, flange;

[0035] 7111. A first covering body; 7112. A second covering body. DETAILED DESCRIPTION

[0036] In the related art, the embedded indoor unit generally includes a shell, an electric control box and a heat exchanger. The shell includes a chassis, a plurality of side panels and a panel. The plurality of side panels are arranged around the chassis. The panel is arranged opposite to the chassis and covers the bottom of the plurality of side panels to form an installation cavity between the chassis and the plurality of side panels. The electric control box includes a box body, a box cover, an insulating support plate and an electric control board. The box body is connected to the side panels. The box cover is covered on the box body and forms an accommodating cavity for accommodating the insulating support plate and the electric control board. The insulating support plate is installed on the box body to connect with the bottom wall of the installation cavity. The electric control board is installed on the insulating support plate. However, in the above-mentioned embedded indoor unit, the electric control box requires more parts. When assembling the electric control box and assembling it to the shell, the steps are relatively cumbersome, which makes the overall assembly efficiency of the embedded indoor unit low. In addition, the electric control box is installed on the side panels, which makes it inconvenient to disassemble and assemble the electric control box and to connect the internal electric control board.

[0037] Therefore, the embodiments of the present application provide an indoor unit and a HVAC system, which can improve the assembly efficiency of the indoor unit.

[0038] It should be noted that the indoor unit provided in the embodiments of the present application includes but is not limited to a ceiling unit.

[0039] See also Figure 1 and Figure 2 , Figure 1 A three-dimensional structural diagram of a partial structure of an indoor unit provided in an embodiment of the present application, Figure 2 for Figure 1 A schematic diagram of the local structure of Figure 1 and Figure 2 As shown, this embodiment provides an indoor unit, including a shell, the shell includes a panel (not shown in the figure) and a casing 1, the casing 1 includes a chassis 11 and a plurality of side panels 12 arranged around the chassis 11, so that the bottom end of the casing 1 is open, and the panel cover is arranged at the open position to form an installation cavity 2 together with the panel, wherein the chassis 11 is arranged opposite to the panel, and the bottom surface of the chassis 11 forms the top wall of the installation cavity 2, and the inner panel surface of the side panel 12 forms the side wall of the installation cavity 2.

[0040] Please continue to see Figure 3 and Figure 4 , Figure 3 for Figure 1 Schematic diagram of the planar structure, Figure 4 for Figure 3 Cross-sectional view along the AA direction. It is understandable that there will be airflow during the operation of the indoor unit, so an air duct can be formed in the housing 1. When the air duct is formed in the housing 1, the side wall of the air duct can be the cavity wall of the installation cavity 2, or an air duct shell for forming the air duct can be set in the installation cavity 2. In this case, the side wall of the air duct is the inner wall surface of the air duct shell. Here, there is no specific limitation on the specific formation method of the air duct.

[0041] In order to enable the indoor unit to operate normally, generally, a heat exchanger (not shown in the figure) and a fan (not shown in the figure) are arranged inside the air duct, and a return air inlet and an air outlet connected to the air duct can be arranged on the panel. The return air inlet and the air outlet are arranged at intervals. When the side wall of the air duct is formed by the cavity wall of the installation cavity 2, the return air inlet and the air outlet are also connected to the installation cavity 2. Specifically, during the operation of the indoor unit, the air in the indoor environment enters the air duct through the return air inlet, the fan sucks the airflow, and after the airflow is heated or cooled by the heat exchanger, it flows out from the air outlet through the fan to heat or cool the indoor environment.

[0042] It should be noted that, in order to prevent the condensed water generated by the heat exchanger from flowing to other components or modules, generally, a water receiving pan 4 is provided below the heat exchanger, and the condensed water generated by the heat exchanger will flow to the water receiving pan 4 .

[0043] When the indoor unit is running, it is necessary to control the electrical components in the indoor unit through the electric control module. Taking the ceiling unit as an example, it can be seen from the above that in the relevant technology, the electric control module is an electric control box installed on the side panel, and the box body of the electric control box is connected to the side panel. When the electric control module needs to be installed on the side panel, it is necessary to assemble the electric control module first, and then install it as a whole on the side panel. Specifically, it is necessary to first connect the insulating support plate to the box body, and then install the electric control board on the insulating support plate, and then connect the electric control box cover to the box body, and finally, connect the electric control module as a whole to the side panel. This assembly method is relatively cumbersome, which makes the overall assembly efficiency of the indoor unit low.

[0044] Please continue to see Figure 5 , Figure 5 for Figure 4 In order to overcome this defect, in the indoor unit provided in this embodiment, the electric control module includes a mainboard bracket 5, an electric control board 6 and a cover body 7, the mainboard bracket 5 is located in the installation cavity 2 and connected to the housing, specifically, the mainboard bracket 5 can be connected to the chassis 11 or the side panel 12; the electric control board 6 is located in the installation cavity 2 and connected to the mainboard bracket 5; the cover body 7 is located in the installation cavity 2 and connected to the housing, specifically, the cover body 7 can be connected to the chassis 11 and / or the side panel 12, and the cover body 7 and the housing 1 enclose a receiving cavity 8 for accommodating the electric control board 6.

[0045] In this way, when the electric control module provided in this embodiment is installed on the casing 1, it is necessary to first connect the mainboard bracket 5 to the casing 1, and then connect the electric control board 6 to the mainboard bracket 5, and finally, connect the cover body 7 to the casing 1. Compared with the assembly method of the electric control module in the related art, since there is no box body design in this embodiment, when assembling the electric control module provided in this embodiment, it does not involve the connection between the box body and the casing and the connection between the cover body and the box body, thereby reducing the number of assembly steps. Therefore, it is possible to shorten the installation time of the electric control module on the casing 1, so that the overall assembly efficiency of the indoor unit provided in this embodiment is higher; in addition, when the box body is not set, the raw materials of the entire electric control module will be less, saving costs; and when the electric control module is inspected, the cover body 7 can be removed from the casing 1 to inspect the electric control board 6, thereby improving the convenience of inspecting the electric control module.

[0046] It should be noted that when the mainboard bracket 5 is connected to the side panel 12 , the cover body 7 can be connected to either the side panel 12 or the chassis 11 ; when the mainboard bracket 5 is connected to the chassis 11 , the cover body 7 can be connected to either the side panel 12 or the chassis 11 .

[0047] It is understandable that when the indoor unit is operating normally, the electric control board 6 will generate more heat. Therefore, in order to enable the indoor unit to operate normally, it is necessary to dissipate heat from the electric control board 6. Therefore, in this embodiment, the cover 7 is exposed from either the return air port or the air outlet. In this way, when the cover 7 is exposed from the return air port, the airflow entering through the return air port during the operation of the fan can carry away the heat generated by the electric control board 6; when the cover 7 is exposed from the air outlet, the airflow flowing out of the air outlet during the operation of the fan can also carry away the heat generated by the electric control board 6. In this way, the heat dissipation of the electric control board 6 can be achieved, and then the heat dissipation of the electric control module can be achieved, thereby improving the performance of the indoor unit provided by this embodiment.

[0048] For ceiling machines, the panel surface direction of the side panel 12 is along the vertical direction. If the mainboard bracket 5 and the side panel 12 are connected by fasteners such as screws, at this time, the axial direction of the fastener is along the horizontal direction. When the operator uses a third-party tool to operate the fastener, the operating posture of the human hand is awkward. Therefore, in order to improve the convenience of connection between the mainboard bracket 5 and the casing 1, the mainboard bracket 5 can be connected to the chassis 11.

[0049] Generally, the motherboard bracket 5 is a plastic part, and the chassis 11 is a sheet metal part. For the connection between the plastic part and the sheet metal part, threaded fasteners such as screws can be used to connect the motherboard bracket 5 and the chassis 11. In this way, the axial direction of the threaded fastener is along the vertical direction, and when the motherboard bracket 5 is disassembled and assembled, the operator's hand can easily apply force to the third-party tool to operate the threaded fastener.

[0050] At present, in order to improve the connection efficiency and the connection reliability between parts, the connection between parts generally tends to be screwless. Therefore, in some optional embodiments, a snap-fit ​​connection method can be adopted between the electronic control board 6 and the main board bracket 5, and the electronic control board 6 includes a circuit board 61 and electrical components arranged on the circuit board 61, and a snap-fit ​​connection method is adopted between the circuit board 61 and the main board bracket.

[0051] like Figure 5 As shown, a first clip 51 and a second clip 52 can be provided on the mainboard bracket 5 on both sides in the width direction of the cover body 7, wherein the first clip 51 has a first stop surface 511 located at the lower end of the circuit board 61 and engaged with the circuit board 61, and the second clip 52 has a second stop surface 521 located at the lower end of the circuit board 61 and engaged with the circuit board 61.

[0052] It should be noted that the width direction of the cover body 7 is Figures 1 to 3 The yy-axis direction is consistent.

[0053] In order to facilitate the snap connection between the circuit board 61 and the first buckle 51, a guide slope 512 can be set on one side of the first buckle 51, and the side of the guide slope 512 away from the center of the accommodating cavity 8 is located below the side of the guide slope 512 close to the center of the accommodating cavity 8.

[0054] It can be understood that in order to improve the connection reliability between the circuit board 61 and the mainboard bracket 5, a plurality of first buckles 51 and a plurality of second buckles 52 can be provided, and the distribution direction of the plurality of first buckles 51 and the plurality of second buckles 52 is consistent with the length direction of the cover body 7, wherein the length direction of the cover body 7 is consistent with the length direction of the cover body 7. Figures 1 to 3 The xx-axis direction is consistent.

[0055] Due to some safety regulations on the circuit, a wire clamp 9 needs to be provided on the mainboard bracket 5, and the wire clamp 9 is for the power line to pass through. Since the power line is thick, the power line needs to be separated from other wire harnesses connected to the electric control board 6. Therefore, the wire clamp 9 needs to be exposed outside the accommodating cavity 8. During the specific assembly, the cover body 7 is first connected to the housing 1, and then the wire clamp 9 is installed on the mainboard bracket 5. Therefore, in the length direction of the cover body 7, at least part of the mainboard bracket 5 extends out of the cover body 7. In this way, the safety regulations on the circuit can be met.

[0056] The length direction of the cover 7 is Figures 1 to 3 The xx-axis direction is consistent.

[0057] In some specific embodiments, wire clamps 9 are provided on both sides of the mainboard bracket 5 along the length direction of the return air outlet. Therefore, in the length direction of the cover body 7, both ends of the mainboard bracket 5 along the length direction of the return air outlet extend out of the cover body 7.

[0058] When the size of the mainboard bracket 5 is larger than that of the cover body 7 in the length direction of the cover body 7, the bottom surface of the mainboard bracket 5 will form the top wall of the accommodating cavity 8. The cover body 7 includes a cover plate 71 and a plurality of end covers 72, and the plurality of end covers 72 are arranged around the circumference of the cover plate 71; the cover plate 71 is connected to the side plate 12, one end of the end cover 72 is connected to the cover plate 71, and the other end of the end cover 72 extends toward the chassis 11, the inner wall of the cover plate 71 forms the bottom wall of the accommodating cavity 8, and the inner plate surface of the end cover 72 and the inner plate surface of the side plate 12 together form the side wall of the accommodating cavity 8.

[0059] If the end cover 72 is connected to the chassis 11, a connecting plate extending along the inner wall of the chassis 11 needs to be provided at the top of the end cover 72. Undoubtedly, the provision of the connecting plate will not only complicate the processing steps of the cover 7, but also increase the processing cost of the cover 7. Therefore, in this embodiment, for the connection between the cover 7 and the housing 1, it is only necessary to connect the cover plate 71 with the side plate 12. In this way, the end of the end cover 72 away from the cover plate 71 will abut against the surface of the mainboard bracket 5 away from the chassis 11. In this way, not only can the processing technology of the cover 7 be simple, the processing cost is low, but also the sealing between the cover 7 and the end cover 72 can be ensured.

[0060] In order to achieve the connection between the cover body 7 and the side panel 12, in the present embodiment, the cover plate 71 includes a covering portion 711 and a connecting portion 712, and the end cover 72 is connected to the covering portion 711; the first end of the connecting portion 712 is connected to the covering portion 711, and the second end of the connecting portion 712 extends toward the side panel 12, and since the cover body 7 is also a sheet metal part, the connecting portion 712 and the side panel 12 can be connected by fasteners; wherein the first end of the connecting portion 712 is located above the second end of the connecting portion 712. When the first end of the connecting portion 712 is located above the second end of the connecting portion 712, it means that the extension direction of the connecting portion 712 has an angle with both the horizontal direction and the vertical direction, that is, the connecting portion 712 extends along the inclined direction, so that the axial direction of the fastener is perpendicular to the extension direction of the connecting portion 712, that is, the axial direction of the fastener also has an angle with the horizontal direction and the vertical direction. In this way, the axial direction of the fastener can be avoided from being consistent with the horizontal direction. Furthermore, when the operator connects the cover body 7 and the side panel 12, it is easier for the operator to operate the third-party tool with his hand, and the hand can easily apply force to the third-party tool, which can improve the disassembly and assembly efficiency between the cover body and the casing 1.

[0061] It should be noted that, in this embodiment, the above-mentioned fasteners can be threaded fasteners such as screws, and at this time, threaded holes whose axial direction is consistent with the axial direction of the fasteners need to be provided on the connecting portion 712 and the side panel 12 connected thereto, so that the axial direction of the threaded hole is perpendicular to the extension direction of the connecting portion 712.

[0062] In some optional embodiments, in order to facilitate the heat dissipation of the electric control board 6 and to facilitate the disassembly of the cover body 7, the return air port and the cover body 7 can be arranged opposite to each other in the vertical direction, that is, the cover body 7 is exposed by the return air port. In this way, when the airflow enters through the return air port, it can directly collide with the electric control module, and the heat generated by the electric control board 6 can be carried away more and faster, thereby improving the heat dissipation efficiency of the electric control board 6; in addition, when the cover body 7 and the return air port are arranged opposite to each other in the vertical direction, after the panel is removed, the cover body 7 can be disassembled, and then the electric control board 6 can be inspected, thereby improving the convenience of inspecting the electric control module.

[0063] It is not difficult to understand that when the cover body 7 and the return air port are arranged opposite each other in the up and down directions, the airflow entering through the return air port may be affected to a certain extent by the presence of the electronic control module. Therefore, in order to avoid affecting the flow of gas to a certain extent, in some embodiments, the structure of the cover body 7 can be improved to avoid the occurrence of this phenomenon.

[0064] Specifically, the covering portion 711 includes a first covering body 7111 and a second covering body 7112; the first covering body 7111 is located between the end cover 72 and the second covering body 7112, the second covering body 7112 is located between the first covering body 7111 and the connecting portion 712, and the second covering body 7112 is connected to the first end of the connecting portion 712; wherein, one end of the first covering body 7111 is connected to the second covering body 7112, and the other end of the first covering body 7111 extends upwardly and is connected to the end cover 72.

[0065] In this way, the connection between the cover portion 711 and the end cover 72 is not a right angle, but forms an oblique angle. Such a setting can avoid the airflow entering from the return air port to a certain extent, and avoid the influence of the setting of the cover body 7 on the air intake to a certain extent, thereby making the indoor unit provided in the present application have better performance.

[0066] Furthermore, the angle between the extension direction of the first covering body 7111 and the horizontal direction is greater than or equal to the angle between the flow direction of the airflow flowing in through the return air port and the horizontal direction. In this way, even if the airflow flowing in from the return air port collides with the first covering body 7111, when the angle between the extension direction of the first covering body 7111 and the horizontal direction is equal to the angle between the flow direction of the airflow flowing in through the return air port and the horizontal direction, the first covering body 7111 can also play a certain guiding role on the flow direction of the airflow; or, when the angle between the extension direction of the first covering body 7111 and the horizontal direction is greater than the angle between the flow direction of the airflow flowing in through the return air port and the horizontal direction, the airflow can continue to flow downstream along the original direction after colliding with the first covering body 7111.

[0067] Therefore, through the above-mentioned structural design of the cover body 7, not only the purpose of removing the box body can be achieved, but also the influence of the setting of the electric control module on the flow of gas can be avoided. In addition, while meeting the purpose of easy maintenance of the electric control module, the ultra-thin design of the electric control module can be realized, which can improve the structural compactness of the indoor unit in the height direction.

[0068] like Figure 5 As shown, since the electric control board 6 is arranged inside the accommodating cavity 8, it is necessary to ensure the sealing performance between the cover body 7 and the side plate 12, so in some embodiments, the cover plate 71 further includes a flange 713, and the flange 713 is connected to the second end of the connecting portion 712; the flange 713 extends downward along the plate surface direction of the side plate 12 and contacts the side plate 12. In this way, when the flange 713 contacts the side plate 12, the sealing performance between the flange 713 and the side plate 12 is better, thereby making the sealing performance between the cover body 7 and the housing 1 better.

[0069] When the mainboard bracket 5 is connected to the chassis 11, that is, in the up and down directions, the depth value of the accommodating cavity 8 can be made close to the height value of the indoor unit. At this time, two layers of electric control boards 6 distributed along the up and down directions can be set in the accommodating cavity 8. Each layer of the electric control board 6 can include a circuit board 61 and electrical components arranged on the circuit board 61. In some embodiments, in order to facilitate the setting of the two layers of the electric control board 6, the electrical components in one layer of the electric control board 6 can be low-voltage components, and the electrical components in the other layer of the electric control board 6 can be high-voltage components. In this way, the wiring of the electric control board 6 is facilitated.

[0070] It should be noted that the above-mentioned up and down directions are Figure 1 , Figure 2 and Figure 4 The up and down directions are consistent.

[0071] like Figure 2 As shown, in order to improve the compactness of the structure of the indoor unit provided in this embodiment, a wire clamp 10 can be provided on the mainboard bracket 5, and the wire clamp 10 is used to clamp the wire harness connected to the electric control board 6. In this way, the wire clamp 10 is integrated on the mainboard bracket 5, so that the compactness of the structure of the indoor unit provided in this embodiment can be improved.

[0072] Furthermore, the mainboard bracket 5 is plate-shaped, and the extension direction of the board surface of the mainboard bracket 5 is consistent with the extension direction of the board surface of the circuit board 61 of the electric control board 6. In this way, compared with the angle between the extension direction of the board surface of the mainboard bracket 5 and the extension direction of the board surface of the circuit board 61, such a configuration can further improve the compactness of the structure of the indoor unit in the height direction of the indoor unit. Among them, the height direction of the indoor unit is consistent with the up-down direction.

[0073] Please continue to see Figure 6 , Figure 6 for Figure 1 The enlarged schematic diagram of the local structure at C in the middle. The cover body 7 is provided with a wire hole 73, and the wire hole 73 is used for passing the wire harness connected to the electric control board 6. The wire hole 73 can be provided on the end cover 72, and specifically, the wire hole 73 can be provided on the end cover 72 on both sides distributed along the length direction of the cover body 7. By providing the wire hole 73 on the end cover 72, the wire harness connected to the electric control board 6 can pass through the accommodating cavity 8, so that the electric control board 6 can be electrically connected to other electrical components normally.

[0074] Please continue to see Figure 7 and Figure 8 , Figure 7 A schematic diagram of the coordination relationship between the water receiving tray and the electric control module in the indoor unit provided in an embodiment of the present application, Figure 8A schematic diagram of the structure of the water receiving pan in the indoor unit provided in the embodiment of the present application. In this embodiment, since the cover body 7 and the fan are located on opposite sides of the heat exchanger, in order to avoid interference between the water receiving pan 4 and the structure of the electric control module, a notch 41 that avoids the cover body 7 needs to be provided on the water receiving pan 4, that is, a notch 41 that avoids the electric control module needs to be provided on the water receiving pan 4. In this way, by providing the notch 41, even if the electric control module in this embodiment is installed on the chassis 11, it will not interfere with other structures or parts.

[0075] Generally, there is at least one return air vent in a ceiling machine, and in order to further improve the heat dissipation efficiency of the electric control board 6, the occupied area of ​​the return air vent on the panel can be partially overlapped with the projection area of ​​the cover 7 on the panel. In this way, the airflow entering from the return air vent can flow to the electric control module and carry away the heat generated by the electric control module, which can further improve the heat dissipation efficiency of the electric control module.

[0076] This embodiment further provides a HVAC system, including the indoor unit in the above embodiment. The indoor unit has been described in detail in the above embodiment, and will not be described again here.

[0077] It should be noted that the HVAC system provided in this embodiment should also include other components or modules such as an outdoor unit. Here, other components or modules in the HVAC system provided in this embodiment are not introduced one by one.

Claims

1. An indoor unit, characterized in that: include: A housing is formed with a mounting cavity; A mainboard bracket is located in the installation cavity and connected to the housing; An electric control board, located in the installation cavity and connected to the mainboard bracket; as well as The cover body is located in the installation cavity and connected to the shell, and the cover body and the shell are enclosed to form a receiving cavity for accommodating the electric control board.

2. The indoor unit according to claim 1, characterized in that: The housing comprises a panel and a casing, the casing has an open bottom, and the panel cover is arranged at the open bottom to enclose the panel and form the installation cavity; The panel is provided with an air return port and an air outlet connected to the installation cavity, and the air return port and the air outlet are arranged at intervals; Wherein, the cover body is exposed by any one of the return air port and the outlet air port.

3. The indoor unit according to claim 2, characterized in that: The housing comprises a chassis and a plurality of side panels arranged around the chassis; The bottom plate is arranged opposite to the panel, and the bottom surface of the bottom plate forms the top wall of the installation cavity, and the inner surface of the side plate forms the side wall of the installation cavity; The mainboard bracket is connected to the chassis, and the cover is connected to the chassis or the side panel.

4. The indoor unit according to claim 3, characterized in that: The cover body comprises a cover plate and a plurality of end covers, wherein the plurality of end covers are arranged around the circumference of the cover plate; The cover plate is connected to the side plate, one end of the end cover is connected to the cover plate, and the other end of the end cover extends toward the bottom plate.

5. The indoor unit according to claim 4, characterized in that: The cover plate comprises a covering portion and a connecting portion, and the end cover is connected to the covering portion; The first end of the connecting portion is connected to the covering portion, the second end of the connecting portion extends toward the side plate, and the connecting portion and the side plate are connected by a fastener; Wherein, the first end of the connecting portion is located above the second end of the connecting portion.

6. The indoor unit according to claim 5, characterized in that: The return air port is arranged opposite to the cover body in the up-down direction.

7. The indoor unit according to claim 5 or 6, characterized in that: The covering portion includes a first covering body and a second covering body; The first covering body is located between the end cover and the second covering body, the second covering body is located between the first covering body and the connecting portion, and the second covering body is connected to the first end of the connecting portion; Wherein, one end of the first covering body is connected to the second covering body, and the other end of the first covering body extends upwardly and is connected to the end cover.

8. The indoor unit according to claim 7, characterized in that: The angle between the extension direction of the first covering body and the horizontal direction is greater than or equal to the angle between the flow direction of the airflow flowing in through the return air port and the horizontal direction.

9. The indoor unit according to claim 7, characterized in that: It also includes a fan and a heat exchanger, wherein the fan and the heat exchanger are both located in the installation cavity; The cover and the fan are located on opposite sides of the heat exchanger, and a water receiving pan is provided below the heat exchanger; The water receiving tray is provided with a notch for avoiding the cover body.

10. The indoor unit according to claim 5, characterized in that: The cover plate further includes a flange connected to the second end of the connecting portion; The flange extends downward along the plate surface direction of the side plate and contacts the side plate.

11. The indoor unit according to any one of claims 4 to 6, 8 to 9, characterized in that: In the length direction of the cover body, the mainboard bracket at least partially extends out of the cover body, and one end of the end cover away from the cover plate abuts against the surface of the mainboard bracket away from the chassis.

12. The indoor unit according to any one of claims 2 to 6 and 8 to 10, characterized in that: There is at least one return air outlet; The occupied area of ​​the return air outlet on the panel partially overlaps with the projection area of ​​the cover body on the panel.

13. The indoor unit according to any one of claims 1 to 6 and 8 to 10, characterized in that: The cover body is provided with a wire hole, and the wire hole is used for passing a wire harness connected to the electric control board.

14. The indoor unit according to any one of claims 1 to 6 and 8 to 10, characterized in that: The mainboard bracket is provided with a wire clamp, and the wire clamp is used to clamp the wire harness connected to the electric control board.

15. A HVAC system, characterized in that: The indoor unit comprises the indoor unit according to any one of claims 1 to 14.

Images