Indoor unit and HVAC device

Abstract

An indoor unit (10) and an HVAC device. The indoor unit (10) comprises a housing (1) and an electric control box (6). An air duct (2) is defined within the housing (1). The electric control box (6) is mounted in the housing (1). One portion of the electric control box (6) is connected to the housing (1) in an electrically insulated manner, and another portion of the electric control box (6) is conductively connected to the housing (1), so that static electricity inside the electric control box (6) can be discharged via the electric control box (6) and the housing (1), thereby improving the operational performance of the electric control box (6).

Description

Indoor unit and HVAC equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 11, 2024, with application number 202420079036.2, and invention name “Indoor unit and HVAC equipment”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of air conditioning, and in particular to an indoor unit and a heating and ventilation equipment using the indoor unit. Background Art

[0003] In the related art, the indoor unit includes a casing and an electric control box. The electric control box is arranged inside or outside the casing. Since there are some conductive components inside the electric control box, static electricity is easily generated inside the electric control box. Summary of the Invention

[0004] The embodiments of the present application provide an indoor unit and HVAC equipment, which are configured to solve the problem in the related art that static electricity in the electric control box cannot be discharged in time, thereby affecting the performance of the electric control box and the indoor unit.

[0005] On the one hand, the present application provides an indoor unit, including a shell and an electrical control box, wherein an air outlet duct is defined in the shell; the electrical control box is installed in the shell, and a part of the structure of the electrical control box is insulated and connected to the shell, and another part of the structure of the electrical control box is conductively connected to the shell.

[0006] As an optional embodiment, the air duct includes a pressure diffuser chamber; the shell includes a pressure diffuser chamber lower shell, a connecting piece and two side panels, the top surface of the pressure diffuser chamber lower shell forms the bottom wall of the pressure diffuser chamber, the two side panels are distributed at opposite ends of the shell, and the pressure diffuser chamber lower shell and any one of the two side panels are connected to the connecting piece; wherein, one side of the electrical control box is insulated and connected to the bottom surface of the pressure diffuser chamber lower shell, and the other side of the electrical control box is conductively connected to the connecting piece.

[0007] As an optional implementation, one side of the electric control box is snap-fitted to the lower shell of the diffuser chamber, and the other side of the electric control box is connected to the connector via a fastener.

[0008] As an optional embodiment, the electrical control box includes a box body and an electrical control board assembly, a housing for accommodating the electrical control board assembly is formed in the box body, and one side of the box body is clamped to the lower shell of the diffuser chamber; the electrical control board assembly includes a circuit board and a grounding wire connected to the circuit board, part of the grounding wire passes through the side wall of the box body and out of the housing cavity, and is crimped to the connector through fasteners to ground the electrical control box.

[0009] As an optional embodiment, a first screw hole is provided on the circuit board and a second screw hole is provided on the box body. The threaded fastener can pass through the first screw hole and the second screw hole to connect the electric control board assembly and the box body together; the grounding wire is connected to the first screw hole to conduct the static electricity generated by the electric control board assembly through the box body and the connector.

[0010] As an optional embodiment, the connecting member includes a first connecting portion and a second connecting portion connected in sequence; the first connecting portion extends along the bottom wall of the box body, and the first connecting portion is connected to the box body; the second connecting portion is connected to the lower shell of the diffuser chamber, and the second connecting portion extends along the lower shell of the diffuser chamber.

[0011] As an optional embodiment, the first connecting portion is connected to the box body via a fastener, and the second connecting portion is clamped to the lower shell of the diffuser chamber.

[0012] As an optional implementation, the connecting piece is snap-connected to the lower shell of the diffuser chamber.

[0013] As an optional implementation, the indoor unit provided in the present application further includes a transition connector; both ends of the transition connector are conductively connected to the connector and the side panel respectively.

[0014] As an optional implementation, both ends of the transition connector are conductively connected to the connector and the side plate via threaded fasteners.

[0015] As an optional embodiment, the indoor unit provided in the present application further includes a wind wheel, the air duct further includes a wind wheel cavity connected to the pressure diffuser cavity, and the wind wheel is arranged in the wind wheel cavity; the connecting piece is located between the wind wheel and the electrical control box.

[0016] As an optional embodiment, the indoor unit provided in the present application also includes a protective grille, and the shell also includes an upper shell of the wind wheel cavity, which defines the inner wall of the wind wheel cavity; the two ends of the protective grille are respectively connected to the connecting piece and the upper shell of the wind wheel cavity.

[0017] As an optional implementation, both ends of the protective grille are respectively clamped with the connecting piece and the upper shell of the wind wheel cavity.

[0018] As an optional implementation, the electric control box is arranged at the bottom of the shell and located outside the shell.

[0019] As an optional implementation, a mounting cavity is formed at the bottom of the shell, and the electric control box is installed in the mounting cavity.

[0020] As an optional embodiment, the electrical control box includes a box body and a box cover, the box body is connected to the side wall of the installation cavity, the box cover is arranged on the box body and is detachably connected to the box body, and the box cover and the box body are combined to form a accommodating cavity; wherein, the box cover is exposed at the bottom of the shell.

[0021] On the other hand, the present application provides a HVAC equipment including the above-mentioned indoor unit.

[0022] In the indoor unit and HVAC equipment provided in the embodiment of the present application, part of the structure of the electric control box is conductively connected to the shell, so that the static electricity in the electric control box can be discharged through the box body and shell of the electric control box, which can not only improve the performance of the electric control box, but also improve the performance of the indoor unit provided in this embodiment; in addition, after the static electricity is discharged, the overall safety of the electric control box can be improved when the electric control box is inspected and repaired. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic diagram of the three-dimensional structure of an indoor unit provided in an embodiment of the present application;

[0024] FIG2 is a schematic diagram of the three-dimensional structure of the indoor unit provided in an embodiment of the present application from another perspective;

[0025] FIG3 is an exploded view of an indoor unit provided in an embodiment of the present application;

[0026] FIG4 is a schematic structural diagram of a first partial structure of an indoor unit provided in an embodiment of the present application;

[0027] FIG5 is a schematic structural diagram of a second partial structure of an indoor unit provided in an embodiment of the present application;

[0028] FIG6 is a schematic diagram of the three-dimensional structure of the box body in the indoor unit provided in an embodiment of the present application;

[0029] FIG7 is a schematic structural diagram of a third partial structure of an indoor unit provided in an embodiment of the present application;

[0030] FIG8 is an enlarged schematic diagram of the local structure at point A in FIG7 ;

[0031] FIG9 is a schematic structural diagram of a fourth partial structure of an indoor unit provided in an embodiment of the present application;

[0032] FIG10 is an enlarged schematic diagram of the local structure at point B in FIG9 ;

[0033] FIG11 is an enlarged schematic diagram of the local structure at point C in FIG9 ;

[0034] FIG12 is a schematic diagram of the three-dimensional structure of the connecting member in the indoor unit provided in an embodiment of the present application;

[0035] FIG13 is a schematic structural diagram of FIG7 from another perspective;

[0036] FIG14 is an enlarged schematic diagram of the local structure at D in FIG13;

[0037] FIG15 is a schematic structural diagram of a fifth partial structure of an indoor unit provided in an embodiment of the present application;

[0038] FIG16 is an enlarged schematic diagram of the local structure at point E in FIG15 .

[0039] Explanation of Reference Numerals: 1. Housing; 2. Air Duct; 3. Wind Wheel; 4. Heat Exchanger; 5. Protective Grille; 6. Electric Control Box; 7. Screw; 10. Indoor Unit; 11. First Housing; 12. Second Housing; 13. Connector; 14. Transition Connector; 21. Air Inlet; 22. Wind Wheel Cavity; 23. Diffuser Cavity; 24. Heat Exchange Cavity; 25. Air Outlet; 61. Box Body; 62. Box Cover; 63. Electric Control Panel Assembly; 64. Accommodating Cavity; 610. Box Body; 20. Fastener; 111. upper shell of the wind wheel cavity; 112. upper shell of the pressure diffuser cavity; 113. upper shell of the heat exchange cavity; 114. side panel; 121. lower shell of the pressure diffuser cavity; 122. water collecting tray; 123. mounting cavity; 124. first clamping portion; 125. second clamping portion; 131. second threaded hole; 132. first connecting portion; 133. second connecting portion; 141. first connecting plate; 142. second connecting plate; 143. reinforcing plate; 211. inner return air outlet; 212. heat dissipation outlet; 611. first clamping hole; 612. first threaded hole; 613. second screw hole; 631. first screw hole; 1241. connecting section; 1242. clamping section; 1243. reinforcing rib; 1251. connecting rib; 1252. hook; 1331. second clamping hole; 1332. third clamping hole. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

[0041] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0042] In the related art, an indoor unit includes a housing and an electrical control box, which is located inside or outside the housing. Typically, the electrical control box is in contact with the housing structure, which is usually made of plastic. Because the electrical control box contains some conductive components, static electricity is easily generated inside the box. However, if this static electricity cannot be promptly dissipated, it will affect the performance of the electrical control box and, in turn, the performance of the entire indoor unit.

[0043] Therefore, the embodiments of the present application provide an indoor unit and HVAC equipment that can conduct static electricity in the electric control box and improve the performance of the electric control box and the indoor unit.

[0044] The embodiments of the present application will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0045] Please refer to Figures 1 to 4. Figure 1 is a schematic diagram of the three-dimensional structure of the indoor unit provided in an embodiment of the present application. Figure 2 is a schematic diagram of the three-dimensional structure of the indoor unit provided in an embodiment of the present application from another perspective. Figure 3 is an exploded view of the indoor unit provided in an embodiment of the present application. Figure 4 is a schematic diagram of the structure of the first partial structure of the indoor unit provided in an embodiment of the present application. As shown in Figures 1 to 4, this embodiment provides an indoor unit 10, including a shell 1, an air duct 2 is defined in the shell 1, and the air duct 2 includes an air intake 21, a wind wheel cavity 22, a pressure diffusion cavity 23, a heat exchange cavity 24 and an air outlet 25 connected in sequence. In order to achieve the normal cooling or heating function of the indoor unit 10, the indoor unit 10 provided in this embodiment should also include a wind wheel 3 and a heat exchanger 4, wherein the wind wheel 3 is arranged in the wind wheel cavity 22, and the heat exchanger 4 is arranged in the heat exchange cavity 24. During the operation of the indoor unit 10, driven by the wind wheel 3, the airflow discharged from the air outlet side of the wind wheel 3 flows through the pressure diffusion chamber 23 and the heat exchange chamber 24 in sequence and is discharged from the air outlet 25. When the airflow passes through the connection between the pressure diffusion chamber 23 and the heat exchange chamber 24, compared with the form of centrifugal fan used in related technologies, it is less likely for airflow to swirl, and the airflow flows more smoothly, so that the airflow energy loss is less.

[0046] Specifically, the housing 1 includes a first housing 11 and a second housing 12 that are connected together. The first housing 11 and the second housing 12 are fastened together in the vertical direction and define the air duct 2. The first housing 11 is located above the second housing 12. The first housing 11 includes a rotor chamber upper shell 111, a diffuser chamber upper shell 112, a heat exchange chamber upper shell 113, and two side panels 114 that are connected together. The two side panels 114 are spaced apart along the length of the indoor unit 10. The inner surface of the rotor chamber upper shell 111 defines the inner wall of the rotor chamber 22, the bottom surface of the diffuser chamber upper shell 112 defines the top wall of the diffuser chamber 23, and the bottom surface of the heat exchange chamber upper shell 113 defines the top wall of the heat exchange chamber 24.

[0047] Furthermore, the above-mentioned second shell 12 includes a diffuser chamber lower shell 121 and a water receiving tray 122 connected in sequence, wherein the top surface of the diffuser chamber lower shell 121 defines the bottom wall of the diffuser chamber 23, and the top surface of the water receiving tray 122 defines the bottom wall of the heat exchange chamber 24.

[0048] It should be noted that the above-mentioned up-down direction is consistent with the up-down direction in FIG. 1 to FIG. 4 , and the length direction of the above-mentioned indoor unit 10 is consistent with the xx-axis direction in FIG. 1 to FIG. 3 .

[0049] Since airflow will enter the wind wheel cavity 22 through the air suction port 21 during the rotation of the wind wheel 3, in order to prevent larger foreign objects from entering the wind wheel cavity 22 through the air suction port 21, a protective grille 5 can be set between the lower shell 121 of the diffuser cavity and the upper shell 111 of the wind wheel cavity, and the protective grille 5 covers the air suction port 21. The setting of the protective grille 5 can not only prevent larger foreign objects from entering the wind wheel cavity 22 through the air suction port 21, but also when the indoor unit 10 provided by this embodiment is inspected and repaired, it can to a certain extent prevent the wind wheel 3 from causing damage to maintenance personnel, etc., and the protective grille 5 has a two-way protection function.

[0050] It is understandable that when cooling or heating functions are required, corresponding electronic control devices need to be provided, such as the electronic control box 6 in this embodiment. In some optional embodiments, in order to facilitate the disassembly and assembly of the electronic control box 6, to improve the structural compactness of the indoor unit 10 provided in this embodiment, and to facilitate heat dissipation of the electronic control box 6, the lower shell 121 of the pressure diffuser chamber can be recessed upward to form an installation cavity 123. The electronic control box 6 is located in the installation cavity 123. The air intake 21 includes a connected internal return air vent 211 and a heat dissipation vent 212. The internal return air vent 211 is located below the impeller 3, and the heat dissipation vent 212 is located between the impeller 3 and the electronic control box 6. In this way, not only can the electronic control box 6 be provided outside the housing 1, making it easier to inspect and repair the electronic control box 6, but also, by forming the installation cavity 123, the height of the indoor unit 10 does not change, that is, the size of the indoor unit 10 in the vertical direction does not change. In addition, the heat dissipation port 212 is located between the wind wheel 3 and the electronic control box 6. During the rotation of the wind wheel 3, the external airflow can be sucked into the wind wheel cavity 22 through the electronic control box 6 and the heat dissipation port 212 in turn, and the heat generated on the surface of the electronic control box 6 can be carried into the wind wheel cavity 22, thereby improving the performance of the electronic control box 6.

[0051] Specifically, the electrical control box 6 includes a body 61, a cover 62, and an electrical control board assembly 63. The body 61 is connected to the sidewall of the mounting cavity 123, and the cover 62 is removably attached to the body 61. The cover 62 and the body 61 form a housing 610 of the electrical control box. The cover 62 and the body 61 enclose a receiving cavity 64. The electrical control board assembly 63 is located within the receiving cavity 64 and mounted to the body 61. The cover 62 is exposed at the bottom of the housing 1. Thus, after removing the grille on the external return air vent, the cover 62 can be removed, allowing the electrical control board assembly 63 to be inspected.

[0052] The box cover 62 and the box body 61 can be connected by a snap-fit ​​connection, a threaded connection, or a combination of a snap-fit ​​connection and a threaded connection. In this embodiment, in order to facilitate assembly and disassembly of the box cover 62 and the box body 61, a combination of a snap-fit ​​connection and a threaded connection can be adopted. This not only facilitates assembly and disassembly of the box cover 62 and the box body 61, but also improves the reliability of the connection between the box cover 62 and the box body 61. The snap-fit ​​connection structure used between the box cover 62 and the box body 61 is not specifically limited.

[0053] The electric control board assembly 63 can be mounted on the box body 61 by screws or other threaded fasteners.

[0054] Generally, the electrical control board assembly 63 is equipped with several conductive components. Therefore, static electricity is generated within the electrical control box 6. If this static electricity is not dissipated, the performance of the electrical control box 6 will be affected. Therefore, in some embodiments, a portion of the electrical control box 6 is insulated from the housing 1, while another portion is conductively connected to the housing 1. This portion of the electrical control box 6 conductively connected to the housing 1 can dissipate static electricity within the electrical control box 6, maintaining good performance.

[0055] Continuing with Figure 5, Figure 5 is a schematic diagram of a second partial structure of an indoor unit according to an embodiment of the present application. In some specific embodiments, along the width direction of the electrical control box 6, one side of the box body 61 can be insulated from and connected to the diffuser chamber lower shell 121, while the other side of the box body 61 is electrically conductively connected to the housing 1.

[0056] The width direction of the electric control box 6 forms a certain angle with the yy-axis direction in FIG. 1 to FIG. 4 , that is, the installation surface of the electric control box 6 forms a certain angle with the horizontal direction.

[0057] It should be noted that since the box body 61 is made of metal, when the box body 61 is insulated and connected to the lower shell 121 of the diffusion chamber, it means that the lower shell 121 of the diffusion chamber is made of an insulating material, such as a plastic material; when the other side of the box body 61 is conductively connected to the shell 1, it means that part of the structure of the shell 1 connected to the other side of the box body 61 is made of a conductive material, such as a metal material.

[0058] Continuing with Figures 6 to 8, Figure 6 is a schematic diagram of the three-dimensional structure of the box body in the indoor unit provided in an embodiment of the present application, Figure 7 is a schematic diagram of the third partial structure of the indoor unit provided in an embodiment of the present application, and Figure 8 is an enlarged schematic diagram of the partial structure at point A in Figure 7. As shown in the figures, with respect to the side of the box body 61 that is insulated from the pressure diffuser chamber lower shell 121, a first engaging portion 124 can be provided on the side of the pressure diffuser chamber lower shell 121 facing the side wall of the box body 61, and a first engaging hole 611 can be provided on the side wall of the box body 61. The first engaging hole 611 engages with the first engaging portion 124, and the first engaging portion 124 engages with the first engaging hole 611, thereby connecting the side of the box body 61 to the pressure diffuser chamber lower shell 121.

[0059] Specifically, the first clamping portion 124 includes a connecting section 1241 and a clamping section 1242. The connecting section 1241 is connected to the lower shell 121 of the diffusion chamber. The clamping section 1242 is connected to the side of the connecting section 1241 facing the side wall of the box body 61, and the clamping section 1242 passes through the first clamping hole 611 and is clamped together with the first clamping hole 611.

[0060] In order to improve the connection reliability between the first clamping part 124 and the first clamping hole 611, and to improve the structural strength of the first clamping part 124, a reinforcing rib 1243 can be set between the clamping section 1242 and the lower shell 121 of the diffuser chamber. The setting of the reinforcing rib 1243 can not only increase the friction force between the first clamping part 124 and the first clamping hole 611, but also enhance the structural strength of the first clamping part 124, thereby improving the connection reliability between the first clamping part 124 and the first clamping hole 611.

[0061] It should be noted that the number of the first clamping portion 124 and the first clamping hole 611 can both be two. Since the length of the electric control box 6 is relatively long, the first clamping portion 124 and the first clamping hole 611 are both spaced apart along the length direction of the electric control box 6, and one first clamping portion 124 corresponds to one first clamping hole 611. In this way, the connection reliability between the electric control box 6 and the lower shell 121 of the pressure diffuser chamber can be further improved. In some other embodiments, the number of the first clamping portion 124 and the first clamping hole 611 can also be other numbers. Here, there is no specific limitation on the number of the first clamping portion 124 and the first clamping hole 611. The length direction of the electric control box 6 is consistent with the length direction of the indoor unit 10.

[0062] Since the lower shell 121 of the diffusion chamber is made of plastic, in order to meet the requirement of conductive connection between the box body 61 and the shell 1 on the other side along the width direction of the electrical control box 6, the shell 1 in this embodiment may further include a connector 13. The connector 13 is located between the wind wheel 3 and the electrical control box 6. By setting the connector 13, a conductive connection between the box body 61 and the shell 1 is achieved.

[0063] It should be noted that the above-mentioned connecting member 13 can be made of metal material, for example, the connecting member 13 can be a sheet metal member. Here, there is no specific limitation on the material of the connecting member 13.

[0064] Please continue to refer to Figures 9 to 12. Figure 9 is a schematic diagram of the fourth partial structure of the indoor unit provided in an embodiment of the present application. Figure 10 is an enlarged schematic diagram of the partial structure at point B in Figure 9. Figure 11 is an enlarged schematic diagram of the partial structure at point C in Figure 9. Figure 12 is a schematic diagram of the three-dimensional structure of the connector in the indoor unit provided in an embodiment of the present application. As shown in the figure, the lower shell 121 of the pressure diffuser chamber and either of the two side panels 114 are connected to the connector 13, and the box body 61 is connected to the connector 13 via a fastener 20, wherein the fastener 20 can be a screw 7. In this way, a conductive connection can be achieved between the box body 61 and the housing 1, and static electricity inside the electrical control box 6 can be discharged.

[0065] Specifically, a first threaded hole 612 can be set on the bottom wall of the box body 61, and a second threaded hole 131 corresponding to the first threaded hole 612 can be set on the connecting piece 13. The screw 7 can pass through the first threaded hole 612 and the second threaded hole 131 in sequence to connect the box body 61 and the connecting piece 13 together.

[0066] It should be noted that, in order to improve the connection reliability between the box body 61 and the connecting member 13, the first threaded hole 612 and the second threaded hole 131 can be two, and the two first threaded holes 612 and the two second threaded holes 131 are spaced apart along the length direction of the electric control box 6, and one second threaded hole 131 corresponds to one first threaded hole 612. When there are two first threaded holes 612 and two second threaded holes 131, there are also two screws 7, and one screw 7 corresponds to one first threaded hole 612 and one second threaded hole 131. In other embodiments, the first threaded hole 612 and the second threaded hole 131 can also be other numbers, and here, there is no limitation on the number of the first threaded hole 612 and the second threaded hole 131.

[0067] Continuing with Figures 13 and 14, Figure 13 is a schematic diagram of the structure of Figure 7 from another perspective, and Figure 14 is an enlarged schematic diagram of the partial structure at point D in Figure 13. To position the connector 13 between the diffuser chamber lower shell 121 and the side panel 114, one side of the connector 13 engages with the diffuser chamber lower shell 121 along the length of the indoor unit 10.

[0068] Specifically, the connecting member 13 includes a first connecting portion 132 and a second connecting portion 133 connected in sequence, the first connecting portion 132 extends along the bottom wall of the box body 61, and the above-mentioned second threaded hole 131 is opened on the first connecting portion 132, the second connecting portion 133 extends along the extension direction of the lower shell 121 of the diffuser chamber, and a second clamping hole 1331 is opened on the second connecting portion 133. Correspondingly, a second clamping portion 125 is provided on the lower shell 121 of the diffuser chamber, and the second clamping portion 125 corresponds to the second clamping hole 1331. The second clamping portion 125 includes a connecting rib 1251 and a hook 1252 connected together, the connecting rib 1251 is connected to the lower shell 121 of the diffuser chamber, the hook 1252 is connected to the side of the connecting rib 1251 close to the second connecting portion 133, and the hook 1252 can pass through the second clamping hole 1331 and clamp with the second clamping portion 125.

[0069] Among them, there is a certain distance between the hook 1252 and the connecting rib 1251, so a deformation space can be formed between the hook 1252 and the connecting rib 1251, so as to facilitate the hook 1252 to be inserted into the second hook hole 1331, and can improve the disassembly and assembly efficiency between the connecting piece 13 and the lower shell 121 of the diffuser chamber.

[0070] It should be noted that in this embodiment, a plurality of the second engaging portions 125 and the second engaging holes 1331 can be provided along the length of the indoor unit 10. This improves the connection reliability between the connector 13 and the diffuser chamber lower shell 121. The number of the second engaging portions 125 and the second engaging holes 1331 is not specifically limited.

[0071] Continuing with Figures 15 and 16 , Figure 15 is a schematic diagram of a fifth partial structure of the indoor unit provided in an embodiment of the present application, and Figure 16 is an enlarged schematic diagram of the partial structure at point E in Figure 15 . Because the indoor unit 10 provided in this embodiment is relatively large in length, to facilitate the processing and manufacturing of the connector 13 , the housing 1 in this embodiment further includes a transition connector 14 ; the ends of the transition connector 14 are electrically connected to the connector 13 and the side panel 114 , respectively.

[0072] To ensure that both ends of the transition piece 14 are electrically connected to the connector 13 and the side plate 114, the transition piece 14 can also be made of a metal material. For example, the transition piece 14 can also be a sheet metal member. It is understood that in other embodiments, the connector 13 and the transition piece 14 can also be made of other metal materials, which are not described here.

[0073] Specifically, the transition connector 14 includes a first connecting plate 141 and a second connecting plate 142 connected together, the first connecting plate 141 and the second connecting plate 142 are perpendicular to each other, the first connecting plate 141 and the first connecting portion 132 are connected together by screws or other threaded fasteners, the plate surface direction of the second connecting plate 142 is consistent with the plate surface direction of the side plate 114, and the second connecting plate 142 is connected to the side plate 114 by screws or other threaded fasteners, so that the two ends of the transition connector 14 are conductively connected to the connector 13 and the side plate 114 respectively.

[0074] In order to improve the structural strength of the transition connector 14, a reinforcing plate 143 is further connected between the first connecting plate 141 and the second connecting plate 142. The setting of the reinforcing plate 143 can improve the structural strength of the transition connector 14, improve the connection reliability between the transition connector 14 and the connector 13 and the side plate 114, and further improve the connection reliability between the connector 13 and the side plate 114.

[0075] Since the connection piece 13 covers a portion of the diffuser cavity lower shell 121 , the two ends of the protective grille 5 are connected to the connection piece 13 and the wind wheel cavity upper shell 111 respectively.

[0076] In order to facilitate the disassembly and assembly of the protective grille 5 , in some optional embodiments, both ends of the protective grille 5 are respectively snap-connected with the connecting piece 13 and the upper shell 111 of the wind wheel cavity.

[0077] The connection between the protective grille 5 and the connecting member 13 can be achieved by providing a buckle on the protective grille 5 and providing a third locking hole 1332 on the second connecting portion 133. The buckle engages with the third locking hole 1332 to achieve the connection between the protective grille 5 and the connecting member 13. The shape of the buckle provided on the protective grille 5 is not specifically limited.

[0078] It should be noted that, to improve the connection reliability between the protective grille 5 and the connector 13, a plurality of third latch holes 1332 spaced apart along the length of the indoor unit 10 can be provided on the second connector 133. Accordingly, buckles corresponding to the third latch holes 1332 are provided on the protective grille 5. The number of the third latch holes 1332 is not specifically limited.

[0079] As for the connection between the protective grille 5 and the upper shell 111 of the wind wheel chamber, corresponding buckles can also be formed on the protective grille 5, and corresponding locking holes can be opened on the upper shell 111 of the wind wheel chamber. The connection between the protective grille 5 and the upper shell 111 of the wind wheel chamber can be achieved by the engagement between the buckles and the locking holes. Here, the locking structure provided between the protective grille 5 and the upper shell 111 of the wind wheel chamber is not specifically limited.

[0080] Generally, the electric control board assembly 63 includes a circuit board (not shown) and a grounding wire (not shown) connected to the circuit board. When the electric control box 6 is electrically connected to the connector 13, a portion of the grounding wire passes through the side wall of the box body 61, out of the accommodating cavity 64, and is crimped onto the connector 13 via a fastener, in this embodiment, a screw 7, to ground the electric control box 6. This not only grounds the electric control box 6 but also dissipates static electricity within the electric control box 6, thereby improving the performance of the electric control box 6.

[0081] Specifically, a first screw hole 631 can be provided on the circuit board, and a second screw hole 613 can be provided on the box body 61. A screw or other threaded fastener passes through the first and second screw holes 631 and 613 to connect the electric control board assembly 63 and the box body 61 together, and a ground wire is connected to the first screw hole 631. With this arrangement, the ground wire can be connected to the electric control box 6 via a screw or other threaded fastener, thereby conducting static electricity generated by the electric control board assembly 63 through the box body 61 and the connector 13.

[0082] This embodiment also provides a heating and ventilation system, including the indoor unit 10 of the above embodiment. It should be noted that the indoor unit 10 has been described in detail in the above embodiment and will not be described in detail here. The heating and ventilation system provided in this embodiment should also include an outdoor unit, the structure of which is not specifically limited herein.

[0083] In the description of this application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, in the description of this application, unless otherwise specified, "multiple" refers to at least two, for example, two, three, four, etc. "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0084] The above disclosure is only a preferred embodiment of the present application, and certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. An indoor unit, wherein, Comprising: A housing, which defines an air duct therein; An electric control box, installed on the housing, and a part of the structure of the electric control box is insulated and connected to the housing, and another part of the structure of the electric control box is conductively connected to the housing.

2. The indoor unit according to claim 1, wherein, The air duct includes a diffuser chamber; The housing includes a diffuser chamber lower shell, a connecting member, and two side plates. The top surface of the diffuser chamber lower shell forms the bottom wall of the diffuser chamber. The two side plates are distributed at opposite ends of the housing, and the diffuser chamber lower shell is connected to any one of the two side plates by the connecting member; Wherein, one side of the electric control box is insulated and connected to the bottom surface of the diffuser chamber lower shell, and the other side of the electric control box is conductively connected to the connecting member.

3. The indoor unit according to claim 2, wherein, One side of the electric control box is snap-connected to the diffuser chamber lower shell, and the other side of the electric control box is connected to the connecting member by a fastener.

4. The indoor unit according to claim 3, wherein, The electric control box includes a box body and an electric control board assembly. An accommodation cavity for accommodating the electric control board assembly is formed in the box body, and one side of the box body is snap-connected to the diffuser chamber lower shell; The electric control board assembly includes a circuit board and a ground wire connected to the circuit board. Part of the ground wire passes through the side wall of the box body and exits the accommodation cavity, and is pressed against the connecting member by the fastener to ground the electric control box.

5. The indoor unit according to claim 4, wherein, A first screw hole is formed on the circuit board, and a second screw hole is formed on the box body. A threaded fastener can pass through the first screw hole and the second screw hole to connect the electric control board assembly and the box body together; The ground wire is connected to the first screw hole to conduct the static electricity generated by the electric control board assembly out through the box body and the connecting member.

6. The indoor unit according to claim 4 or 5, wherein The connecting member includes a first connecting portion and a second connecting portion connected in sequence; The first connecting portion extends along the bottom wall of the box body, and the first connecting portion is connected to the box body; The second connecting portion is connected to the diffuser chamber lower shell, and the second connecting portion extends along the diffuser chamber lower shell.

7. The indoor unit according to claim 6, wherein, The first connecting portion is connected to the box body by the fastener, and the second connecting portion is snap-connected to the diffuser chamber lower shell.

8. The indoor unit according to claim 2, wherein, It further includes a transition connecting member; Two ends of the transition connecting member are respectively conductively connected to the connecting member and the side plate.

9. The indoor unit according to claim 8, wherein, Two ends of the transition connecting member are respectively conductively connected to the connecting member and the side plate by threaded fasteners.

10. The indoor unit according to any one of claims 2 to 5 and 7 to 9, wherein, It further includes a wind wheel. The air duct further includes a wind wheel chamber communicated with the diffuser chamber, and the wind wheel is arranged in the wind wheel chamber; The connecting member is located between the wind wheel and the electric control box.

11. The indoor unit according to claim 10, wherein, It further includes a protective grille. The housing further includes a wind wheel chamber upper shell, and the wind wheel chamber upper shell defines the inner wall of the wind wheel chamber; Two ends of the protective grille are respectively connected to the connecting member and the wind wheel chamber upper shell.

12. The indoor unit according to claim 11, wherein, Two ends of the protective grille are respectively snap-connected to the connecting member and the wind wheel chamber upper shell.

13. The indoor unit according to any one of claims 1 to 5 and 7 to 9, wherein, The electric control box is arranged at the bottom of the housing and is located outside the housing.

14. The indoor unit according to claim 13, wherein, An installation cavity is formed at the bottom of the housing, and the electric control box is installed in the installation cavity.

15. The indoor unit according to claim 14, wherein, The electric control box includes a box body and a box cover. The box body is connected to the side wall of the installation cavity. The box cover is disposed on the box body and is detachably connected to the box body. The box cover and the box body enclose a receiving cavity. Wherein, the box cover is exposed at the bottom of the housing.

16. A heating, ventilation and air conditioning (HVAC) device, wherein, An indoor unit according to any one of claims 1 to 15.

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