Electrical appliance box, indoor unit and air conditioner

Abstract

The present invention discloses an electrical box, an indoor unit and an air conditioner, which relates to the technical field of air conditioning and solves the technical problem that the electrical box in the prior art has poor fireproof performance. The electrical box of the present invention comprises a box body, a box cover, a box body fixing plate and a PCB fixing plate, wherein the box body is fixedly connected to the box body fixing plate, the PCB fixing plate is located in the box body, and a step-shaped structure is provided on the box cover, and when the box cover is closed on the top of the box body, a fireproof structure is formed between the step-shaped structure and the box body, the box body fixing plate and / or the PCB fixing plate. In the electrical box of the present invention, when the main board is burned for some reason, the fireproof structure formed between the step-shaped structure and the box body, the box body fixing plate and / or the PCB fixing plate can prevent the flames from escaping, thereby achieving a fireproof effect; on the other hand, the box cover is closed on the top of the box body, so that a sealing structure is formed between the box cover and the box body, which can further prevent the flames from escaping, thereby achieving a fireproof effect.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an electrical appliance box, an indoor unit using the electrical appliance box, and an air conditioner comprising the indoor unit. Background Art

[0002] In the prior art, the electrical box of a neutral air conditioner is generally arranged on the top of the air conditioner cabinet. Due to its high position, it is inconvenient for after-sales staff to perform operations such as disassembly and installation, maintenance of the main board, and patch cords. In addition, since the electrical box is on the top of the air conditioner cabinet, connecting wires need to be connected to the main board in the electrical box through the air duct, air outlet or evaporator. The wiring is messy and unsightly, and there are also safety hazards.

[0003] The patent with publication number CN105910242A discloses an electrical box, an indoor unit and an air conditioner. The electrical box disclosed in the patent has a wire passing port set on the box body of the electrical box, and a wire passing coil installed in the wire passing port. During maintenance, the cover of the electrical box is easy to remove without causing the wire passing coil to fall off, thereby eliminating the risk of wire cutting. The box body and the cover are connected with a snap-on assembly, which can reduce the use of screws and reduce the difficulty and cost of disassembly and assembly.

[0004] However, the applicant found that the electrical box disclosed in the patent has at least the following defects: poor safety performance, when the mainboard burns for some reason, there is a hidden danger of flames escaping from the wire outlet; there are many buckles used, and there are many gaps and gaps, which may cause insects and mice to enter; the PCB board is generally located inside, and it needs to be aligned when taking it out, which is relatively troublesome. In addition, the applicant found that the electrical box of the prior art also has the problem of low assembly efficiency.

[0005] Therefore, improving the existing electrical box and improving the fireproof and insect-proof performance and assembly efficiency of the electrical box have become technical problems that need to be solved urgently by those skilled in the art. Summary of the invention

[0006] One of the purposes of the present invention is to provide an electrical box, an indoor unit and an air conditioner, which solves the technical problem of poor fireproof performance of the electrical box in the prior art. The various technical effects that can be produced by the preferred technical solution of the present invention are described in detail below.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The electrical appliance box of the present invention comprises a box body, a box cover, a box body fixing plate and a PCB fixing plate, wherein the box body is fixedly connected to the box body fixing plate, the PCB fixing plate is located in the box body, and a step-like structure is provided on the box cover, and when the box cover is closed on the box body, a fireproof structure is formed between the step-like structure and the box body, the box body fixing plate and / or the PCB fixing plate.

[0009] According to a preferred embodiment, the step-like structure includes a first step-like structure, the end of the box body fixing plate is set as a box-like structure, the box-like structure is located in front of the wire outlet, and the first step-like structure cooperates with the box-like structure to form a first fire protection structure between the first step-like structure and the box-like structure.

[0010] According to a preferred embodiment, the step-like structure includes a second step-like structure, a slot structure is formed between the side of the box body and the side of the PCB fixing plate, and the second step-like structure is snapped into the slot structure to form a second fireproof structure between the second step-like structure, the side of the box body and the side of the PCB fixing plate.

[0011] According to a preferred embodiment, the box-like structure includes a first plate body, a second plate body and a third plate body, wherein the first plate body and the third plate body are located on both sides of the second plate body and extend in opposite directions, and the third plate body is in contact with the side wall of the box body and is fixedly connected to the box body; a gap is maintained between the first plate body and the side wall of the box body so that a wire passage is formed between the first plate body and the side wall of the box body.

[0012] According to a preferred embodiment, a first guide portion is provided on the first plate body, the first guide portion is inclined toward the direction of the wire passage, and the first step-like structure is assembled above the box-like structure via the first guide portion.

[0013] According to a preferred embodiment, the PCB fixing plate is connected to the box body via a first buckle assembly, wherein the first buckle assembly includes a first buckle located on a side wall of the PCB fixing plate and a first slot located on a side wall of the box body.

[0014] According to a preferred embodiment, the upper edge of the PCB fixing plate is lower than the upper edge of the box body.

[0015] According to a preferred embodiment, a yielding portion is provided on the PCB fixing plate, and a second guiding portion is provided on the box body, wherein the second guiding portion is an inclined surface structure inclined toward the inside of the box body.

[0016] According to a preferred embodiment, the box cover is fixedly connected to the box body, the box body fixing plate and the PCB fixing plate by means of a first screw assembly, a second screw assembly and a third screw assembly respectively.

[0017] According to a preferred embodiment, the wire outlet is arranged on the PCB fixing plate, and the bottom of the wire outlet is lower than the main board in the PCB fixing plate.

[0018] According to a preferred embodiment, the electrical box further comprises a wire trough, the wire trough is arranged at the wire outlet on the PCB fixing plate, and the wire trough is connected to the PCB fixing plate via a second buckle assembly.

[0019] According to a preferred embodiment, the second clip assembly includes second clips located on both sides of the wire trough and mounting holes located on both sides of the wire outlet on the PCB fixing plate, and the wire trough is fixed to the wire outlet on the PCB fixing plate by being clipped into the mounting holes by the second clips.

[0020] According to a preferred embodiment, a retaining edge structure is further provided on the PCB fixing plate, and the retaining edge structure includes a first retaining edge and a second retaining edge, wherein the first retaining edge is located on both sides of the wire outlet, and the second retaining edge is located on both sides of the second buckle assembly.

[0021] According to a preferred embodiment, a rib assembly is also provided on the PCB fixing plate, and the rib assembly is arranged on a side of the PCB fixing plate close to the box body, and the height of the rib assembly protruding from the PCB fixing plate is greater than the height of the second buckle protruding from the PCB fixing plate.

[0022] According to a preferred embodiment, a first guide plate and a second guide plate are respectively arranged on both sides of the opening of the wire passing groove, a gap is provided between the first guide plate and the second guide plate to form a wire passing channel, and the inclined surfaces of the first guide plate and the second guide plate are arranged opposite to each other.

[0023] According to a preferred embodiment, a plurality of first clamping plates and second clamping plates are respectively arranged on both sides of the wire passing groove, and a gap is provided between the end of the first clamping plate and the end of the second clamping plate to form a wire passing channel.

[0024] The indoor unit of the present invention comprises the electrical appliance box described in any technical solution of the present invention.

[0025] The air conditioner of the present invention comprises the indoor unit described in any technical solution of the present invention.

[0026] The electrical box, indoor unit and air conditioner provided by the present invention have at least the following beneficial technical effects:

[0027] The electrical box of the present invention comprises a box body, a box cover, a box body fixing plate and a PCB fixing plate, wherein the box body is fixedly connected to the box body fixing plate, the PCB fixing plate is located in the box body, and a step-shaped structure is provided on the box cover. When the box cover is closed on the top of the box body, a fireproof isolation structure is formed between the step-shaped structure and the box body, the box body fixing plate and / or the PCB fixing plate. When the main board burns for some reason, the fireproof isolation structure formed between the step-shaped structure and the box body, the box body fixing plate and / or the PCB fixing plate can prevent the flames from escaping, thereby achieving a fireproof effect. On the other hand, the box cover is closed on the top of the box body, so that a sealing structure is formed between the box cover and the box body, which can further prevent the flames from escaping, thereby achieving a fireproof effect. At the same time, the indoor unit using the electrical box of the present invention and the air conditioner including the indoor unit also have good fireproof performance, and electrical safety is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 is an exploded view of the electrical box of the present invention;

[0030] Figure 2 is a first schematic diagram of the electrical box of the present invention after assembly;

[0031] Figure 3 is a second schematic diagram of the electrical box of the present invention after assembly;

[0032] Figure 4 This is a first schematic diagram of the PCB fixing plate and the wire trough after being assembled in the present invention;

[0033] Figure 5 This is a second schematic diagram of the PCB fixing plate and the wire trough after being assembled in the present invention;

[0034] Figure 6 is a third schematic diagram of the electrical box of the present invention after assembly;

[0035] Figure 7 It is a schematic diagram of the box body and the box cover of the electrical box of the present invention before being assembled;

[0036] Figure 8 It is a fourth schematic diagram of the electrical box of the present invention after being assembled.

[0037] In the figure: 10, box body; 101, first card slot; 102, second guide portion; 20, box cover; 201, first step-shaped structure; 2011, first step surface; 2012, second step surface; 2013, connecting surface; 202, second step-shaped structure; 203, first screw assembly; 204, second screw assembly; 205, third screw assembly; 30, box body fixing plate; 301, first plate body; 3011, first guide portion; 302, second plate body; 303, third plate Body; 304, fixing part; 40, PCB fixing plate; 401, first buckle; 402, yielding part; 403, mounting hole; 404, first retaining edge; 405, second retaining edge; 406, first rib assembly; 407, second rib assembly; 50, wire trough; 501, second buckle; 502, first guide plate; 503, second guide plate; 504, first card board; 505, second card board; 60, main board; 70, electrical components; 80, wiring components; 90, junction box cover. DETAILED DESCRIPTION

[0038] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0039] The following is attached to the instruction manual Figures 1 to 8 Embodiments 1 to 5 describe the electrical box, indoor unit and air conditioner of the present invention in detail.

[0040] Example 1

[0041] This embodiment describes the electrical appliance box of the present invention in detail.

[0042] The electrical appliance box of this embodiment includes a box body 10, a box cover 20, a box body fixing plate 30 and a PCB fixing plate 40. Figure 1 Preferably, the box body 10 is fixedly connected to the box body fixing plate 30, the PCB fixing plate 40 is located inside the box body 10, and a step-shaped structure is provided on the box cover 20. When the box cover 20 is covered on the box body 10, a fireproof structure is formed between the step-shaped structure and the box body 10, the box body fixing plate 30 and / or the PCB fixing plate 40.

[0043] According to a preferred embodiment, the electrical box of this embodiment further includes a main board 60, electrical components 70, wiring components 80 and a wiring box cover 90. Figure 1 Wherein, the main board 60 and the electrical components 70 are fixed on the PCB fixing plate 40, as shown in FIG. Figure 2The wiring components 80 and the wiring box cover 90 are fixed to the bottom of the box body 10, and the wiring components 80 are located in the wiring box cover 90, as shown in FIG. Figure 3 shown.

[0044] The electrical box of the present embodiment includes a box body 10, a box cover 20, a box body fixing plate 30 and a PCB fixing plate 40, wherein the box body 10 is fixedly connected to the box body fixing plate 30, the PCB fixing plate 40 is located in the box body 10, and a step-shaped structure is provided on the box cover 20. When the box cover 20 is closed on the box body 10, a fireproof structure is formed between the step-shaped structure and the box body 10, the box body fixing plate 30 and / or the PCB fixing plate 40. When the main board 60 is burned for some reason, the fireproof structure formed between the step-shaped structure and the box body 10, the box body fixing plate 30 and / or the PCB fixing plate 40 can prevent the flames from escaping, thereby achieving a fireproof effect; on the other hand, the box cover 20 is closed on the box body 10, so that a sealing structure is formed between the box cover 20 and the box body 10, which can further prevent the flames from escaping, thereby achieving a fireproof effect.

[0045] According to a preferred embodiment, the step-like structure includes a first step-like structure 201, the end of the box body fixing plate 30 is set as a box-like structure, the box-like structure is located in front of the outlet, and the first step-like structure 201 cooperates with the box-like structure to form a first fireproof structure between the first step-like structure 201 and the box-like structure, such as Figure 2 , Figure 6 and Figure 7 As shown. The preferred technical solution of this embodiment can seal the wire outlet of the electrical box by cooperating with the box-shaped structure through the first step-like structure 201, so that when the main board 60 burns for some reason, the flames can be prevented from escaping from the wire outlet. Specifically, when the main board 60 burns for some reason, the box body 10 and the PCB fixing plate 40 can be used to prevent the flames from escaping. Even if there are flames, the box-shaped structure and the box cover 20 can prevent the flames from continuing to escape, thereby achieving multiple fire prevention effects. In addition, the opening of the wiring trough in the prior art is relatively large. The preferred technical solution of this embodiment can seal the wire outlet and press the wires at the same time through the first step-like structure 201 on the box cover 20 to fix the wires.

[0046] According to a preferred embodiment, the step-like structure further includes a second step-like structure 202, a slot structure is formed between the side of the box body 10 and the side of the PCB fixing plate 40, and the second step-like structure 202 is snapped into the slot structure, so that a second fireproof structure is formed between the second step-like structure 202, the side of the box body 10 and the side of the PCB fixing plate 40, such as Figure 3 Preferably, the second step-shaped structure 202 is a Z-shaped structure. The electrical box of the preferred technical solution of this embodiment can perform multi-layer sealing by snapping the second step-shaped structure 202 into the slot structure, thereby improving the fireproof performance of the electrical box.

[0047] Preferably, the first stepped structure 201 is a two-stage stepped structure, which includes a first-stage stepped surface 2011, a second-stage stepped surface 2012, and a connecting surface 2013 between the first-stage stepped surface 2011 and the second-stage stepped surface 2012. Figure 6 Preferably, the first step surface 2011 is located outside the box body 10 and fits with the side wall of the box body 10. The second step surface 2012 is located outside the box-like structure and fits with the side wall of the box-like structure. The connecting surface 2013 is located on the upper end surface of the box-like structure and fits with the upper end surface of the box-like structure.

[0048] Preferably, the box-shaped structure includes a first plate body 301, a second plate body 302 and a third plate body 303. Figure 2 The first plate 301 and the third plate 303 are located on both sides of the second plate 302 and extend in opposite directions, and the third plate 303 is attached to the side wall of the box body 10 and is fixedly connected to the box body 10; a gap is maintained between the first plate 301 and the side wall of the box body 10, so that a wire passage is formed between the first plate 301 and the side wall of the box body 10.

[0049] Preferably, the box body fixing plate 30 further includes two fixing portions 304 located on the side of the box body fixing plate 30, through which the box body fixing plate 30 can be fixedly connected to the remaining components of the electrical box, such as Figure 2 The fixing portion 304 of the preferred technical solution of this embodiment can also be called an ear-type flange structure, which is located on the left side of the box body fixing plate 30.

[0050] According to a preferred embodiment, a first guide portion 3011 is provided on the first plate 301, the first guide portion 3011 is inclined in the direction of the wire passage, and the first step-shaped structure 201 is assembled above the box-shaped structure through the first guide portion 3011, such as Figure 2 or Figure 6 The preferred technical solution of this embodiment is to set a first guide part 3011 on the first plate 301. When the box cover 20 is assembled downward, the first guide part 3011 can guide the box cover 20 to slide downward, thereby improving the assembly efficiency of the electrical box.

[0051] The box body fixing plate 30 of the preferred technical solution of this embodiment, through the box-shaped structure at the end and the fixing part 304 on the left, simultaneously realizes the functions of fire prevention, fixing and guiding of the wire outlet. One component realizes multiple functions at the same time, saves space, and has little influence on the arrangement of other parts, thus solving the problem that the electrical box of the prior art occupies a large volume and affects the arrangement of other parts.

[0052] Example 2

[0053] This embodiment is a further improvement on the basis of the embodiment 1, and only the improved part is described.

[0054] According to a preferred embodiment, the PCB fixing plate 40 is connected to the box body 10 through a first buckle assembly. The first buckle assembly includes a first buckle 401 located on the side wall of the PCB fixing plate 40 and a first slot 101 located on the side wall of the box body 10. Figure 8 Not limited thereto, the first buckle 401 may also be disposed on the box body 10 , and the first card slot 101 may be disposed on the side wall of the PCB fixing plate 40 .

[0055] During the assembly process, the PCB fixing plate 40 is assembled with the box body 10 through the first buckle assembly and then fixed by screws, that is, the right side is fixed by the first buckle assembly and the left side is fixed by screws, and only one screw is needed. Compared with the prior art method of connecting both sides by screws, it can not only reduce the use of screws, but also simplify the assembly process and improve the assembly efficiency. On the other hand, the first buckle 401 of the preferred technical solution of this embodiment is located on the side wall of the PCB fixing plate 40, and the first card slot 101 is located on the side wall of the box body 10, that is, the position of the first buckle assembly is not set above the main board 60, which can facilitate the connection and routing of the patch cord, and solve the problem of inconvenient operation of the patch cord during the installation process of the electrical box in the prior art.

[0056] According to a preferred embodiment, the upper edge of the PCB fixing plate 40 is lower than the upper edge of the box body 10. Preferably, the upper edge of the PCB fixing plate 40 is 1 mm lower than the upper edge of the box body 10. In the electrical box of the preferred technical solution of this embodiment, the PCB fixing plate 40 is generally formed by injection molding. Since there are errors in the injection molding process, in order to avoid the problem of poor sealing between the box cover 20 and the PCB fixing plate 40 due to the large size of the PCB fixing plate 40 after injection molding, the preferred technical solution of this embodiment pre-sets the size of the PCB fixing plate 40 so that the upper edge is lower than the upper edge of the box body 10. Even if there are errors in the PCB fixing plate 40 due to the injection molding process, the box cover 20 and the box body 10 can still fit tightly, thereby ensuring the sealing effect of the electrical box.

[0057] According to a preferred embodiment, a yielding portion 402 is provided on the PCB fixing plate 40, and a second guide portion 102 is provided on the box body 10. The second guide portion 102 is an inclined surface structure inclined toward the yielding portion 402. Figure 7 As shown. The preferred technical solution of this embodiment is that the second guide portion 102 is an inclined surface structure inclined toward the inside of the box body 10, or it can be said that the sharp corner of the second guide portion 102 is inwardly retracted, and with its inclined surface, it can play a guiding role; the second guide portion 102 can also effectively prevent the box body 10 from rebounding during mold forming. Figure 7As shown, when the box cover 20 is assembled downward, the second guide portion 102 can guide the box cover 20 to slide downward, thereby improving the assembly efficiency of the electrical appliance box.

[0058] Preferably, the paving portion 402 is a slotted structure. More preferably, the paving portion 402 is located at a corner of the PCB fixing plate 40. More preferably, the paving portion 402 is a trapezoidal structure with an opening gradually increasing from one end close to the bottom plate of the PCB fixing plate 40 to one end close to the top of the PCB fixing plate 40.

[0059] The preferred technical solution of this embodiment is to set a yielding portion 402 on the PCB fixing plate 40. When the PCB fixing plate 40 is tilted toward the side where the yielding portion 402 is set and placed into the box body 10, the yielding portion 402 can play a yielding role, which is not only conducive to reducing the reserved gap between the PCB fixing plate 40 and the box body 10, so that the gap between the PCB fixing plate 40 and the box body 10 after assembly is reduced, thereby improving the sealing of the electrical appliance box, and also reducing the overall size of the electrical appliance box after assembly; on the other hand, the yielding portion 402 is set on the retaining edge of the PCB fixing plate 40, that is, only a part of the retaining edge is set as the yielding portion 402. Compared with the structure in the prior art where only three sides of the PCB fixing plate 40 are provided with baffles, its sealing is also higher, which can ensure the sealing between the PCB fixing plate 40 and the box body 10.

[0060] The yielding portion 402 of the preferred technical solution of this embodiment is set as a trapezoidal structure with a small bottom and a large top. On the one hand, it can ensure that the yielding portion 402 can provide sufficient yielding space, and on the other hand, it can also ensure the sealing between the PCB fixing plate 40 and the box body 10 to avoid the yielding space being too large.

[0061] According to a preferred embodiment, the box cover 20 is fixedly connected to the box body 10, the box body fixing plate 30 and the PCB fixing plate 40 by means of a first screw assembly 203, a second screw assembly 204 and a third screw assembly 205, respectively. Figure 1 or Figure 8 After assembling the relevant electrical components 70, the box cover 20 is assembled, and the box cover 20 is fixed to the box body 10, the box body fixing plate 30 and the PCB fixing plate 40 by three sets of screw assemblies. Compared with the method of fixing the four corners of the electrical box with four sets of screw assemblies in the prior art, one set of screw assemblies can be saved, which can not only save costs but also improve the assembly efficiency of the electrical box.

[0062] Example 3

[0063] This embodiment is a further improvement on the basis of Embodiment 1 or Embodiment 2, and only the improved part is described.

[0064] According to a preferred embodiment, the outlet is provided on the PCB fixing plate 40, and the outlet is lower than the main board 60 in the PCB fixing plate 40. The bottom of the outlet on the PCB fixing plate 40 is lower than the main board 60 in the PCB fixing plate 40, which can also be said that the outlet on the PCB fixing plate 40 is provided downward. One end of the connecting wire is connected to the main board 60, and the other end is connected to the remaining electrical components after passing through the outlet lower than the main board 60, so that the connecting wire is routed downward after coming out of the main board 60. Even if condensed water condenses on the connecting wire, the condensed water can fall down under the action of gravity, preventing the condensed water from entering the electrical box, thereby solving the problem that the backwater bay of the electrical box in the prior art is not set reasonably, and the circuit is easily damaged by condensation or water ingress.

[0065] According to a preferred embodiment, the electrical box further includes a wire groove 50, which is disposed at the wire outlet on the PCB fixing plate 40, and the wire groove 50 is connected to the PCB fixing plate 40 through a second buckle assembly, such as Figure 4 or Figure 5 As shown. Preferably, the wire groove 50 is a U-shaped structure, and the PCB fixing plate 40 has a wire outlet that matches the wire groove 50. The wire groove 50 of the preferred technical solution of this embodiment is connected to the PCB fixing plate 40 through a second snap assembly, and the wire groove 50 can be fixed on the PCB fixing plate 40. The wire groove 50 of the preferred technical solution of this embodiment is arranged at the wire outlet on the PCB fixing plate 40. Since the PCB fixing plate 40 is on the inner side of the box body 10, through the blocking and protective effect of the box body 10, on the one hand, the flowability of the gas at the connection between the wire groove 50 and the wire outlet is weakened, thereby enhancing the sealing of the electrical box, and on the other hand, it can also prevent the problem of the snap assembly falling off easily.

[0066] Preferably, the second buckle assembly includes second buckles 501 located on both sides of the wire trough 50 and mounting holes 403 located on both sides of the wire outlet on the PCB fixing plate 40. The wire trough 50 is fixed to the wire outlet on the PCB fixing plate 40 by snapping the second buckles 501 into the mounting holes 403. Figure 4 or Figure 5 shown.

[0067] According to a preferred embodiment, a retaining edge structure is further provided on the PCB fixing plate 40, and the retaining edge structure includes a first retaining edge 404 and a second retaining edge 405, wherein the first retaining edge 404 is located on both sides of the outlet, and the second retaining edge 405 is located on both sides of the second buckle assembly. Figure 4 or Figure 5As shown. The preferred technical solution of this embodiment is to set a retaining edge structure near the second buckle assembly and the outlet. On the one hand, the first retaining edge 404 located on both sides of the outlet and the second retaining edge 405 located on both sides of the second buckle assembly can reduce the fluidity of the airflow, thereby further improving the sealing effect at the outlet. On the other hand, the second retaining edge 405 can also enhance the strength of the opening of the PCB fixing plate 40 to prevent the plate body at the opening from being broken during the assembly process.

[0068] According to a preferred embodiment, a rib assembly is further provided on the PCB fixing plate 40, and the rib assembly is provided on a side of the PCB fixing plate 40 close to the box body 10, and the height of the rib assembly protruding from the PCB fixing plate 40 is greater than the height of the second buckle 501 protruding from the PCB fixing plate 40. Preferably, the rib assembly includes a first rib assembly 406 and a second rib assembly 407, such as Figure 5 As shown. Among them, the first rib assembly 406 is located at the second buckle assembly, and the second rib assembly 407 is located at the bottom of the outlet. The preferred technical solution of this embodiment is to set a rib assembly on the PCB fixing plate 40. Through the action of the rib assembly, the wire groove 50 can be prevented from slipping out of the outlet. Specifically, during assembly, the wire groove 50 and the PCB fixing plate 40 are first fixedly connected through the second buckle assembly, and then the PCB fixing plate 40 and the box body 10 are assembled. The assembly is assembled obliquely downward. Through the assembly of the rib assembly, the wire groove 50 or the second buckle 501 on the wire groove 50 can be prevented from hitting other parts or falling off due to force. On the other hand, the preferred technical solution of this embodiment is to set a rib assembly on the PCB fixing plate 40. Through the contact between the rib assembly and the box body 10, the flowability of the gas at the outlet can be weakened, thereby achieving a better sealing effect at the outlet.

[0069] According to a preferred embodiment, a first guide plate 502 and a second guide plate 503 are respectively disposed on both sides of the opening of the wire groove 50, a gap is provided between the first guide plate 502 and the second guide plate 503 to form a wire passage, and the inclined surfaces of the first guide plate 502 and the second guide plate 503 are disposed opposite to each other, such as Figure 4 or Figure 5 In the preferred technical solution of this embodiment, the first guide plate 502 and the second guide plate 503 provided at the opening of the wire slot 50 can guide the connecting wire.

[0070] According to a preferred embodiment, a plurality of first clamps 504 and second clamps 505 are respectively provided on both sides of the wire groove 50, and a gap is provided between the ends of the first clamps 504 and the ends of the second clamps 505 to form a wire passage, such as Figure 4 or Figure 5As shown. Preferably, the plurality of first card plates 504 are parallel to each other and spaced apart. Preferably, the plurality of second card plates 505 are parallel to each other and spaced apart. In the prior art, the wire outlet of the electrical box is directly an opening without a wire slot structure, so that the gap at the wire outlet is large, and insects and rodents can easily enter. The preferred technical solution of this embodiment is provided with a plurality of first card plates 504 and second card plates 505 on both sides of the wire slot 50, respectively, so that the gap of the wire slot 50 can be made smaller, making it more difficult for insects to enter, thereby improving the insect-proof performance of the electrical box.

[0071] From the description of the above embodiments 1 to 3, it can be seen that the electrical box of the present invention improves its fireproof performance by at least the following aspects:

[0072] (1) The box body 10 and the box cover 20 of the electrical box are made of sheet metal. The box cover 20 covers the box body 10, so that a sealing structure can be formed between the box cover 20 and the box body 10, thereby achieving a fire prevention effect;

[0073] (2) The box cover 20 is provided with a first step-shaped structure 201, and the end of the box body fixing plate 30 is provided with a box-shaped structure. The first step-shaped structure 201 cooperates with the box-shaped structure to seal the outlet of the electrical box, thereby preventing flames from escaping from the outlet and achieving a fire prevention effect;

[0074] (3) A second step-shaped structure 202 is provided on the box cover 20, and a slot structure is formed between the side of the box body 10 and the side of the PCB fixing plate 40. The second step-shaped structure 202 is snapped into the slot structure, so that the side of the box body 10 can form a multi-layer sealing structure, thereby improving the fireproof performance of the electrical box;

[0075] (4) The PCB fixing plate 40 is provided with a rib assembly and a baffle structure. Through the action of the rib assembly and the baffle structure, the gas flowability can be weakened, so that the sealing effect of the outlet is better, and the hidden danger of the main board 60 being ignited is reduced.

[0076] (5) The overall sealing performance of the electrical box is good, so that there is less air flow inside the electrical box, which not only reduces the hidden danger of the main board 60 being ignited, but also improves electrical safety.

[0077] From the description of the above embodiments 1 to 3, it can be seen that the electrical box of the present invention improves its insect-proof performance by at least the following aspects:

[0078] (1) The above structure for improving the fireproof performance of the electrical box can not only improve the fireproof performance of the electrical box, but also improve the insect-proof performance of the electrical box by forming a sealed structure of the electrical box;

[0079] (2) A wire groove 50 is provided at the wire outlet, and a plurality of first clamping plates 504 and second clamping plates 505 are provided on both sides of the wire groove 50. Through the functions of the first clamping plates 504 and the second clamping plates 505, the gap of the wire groove 50 can be made smaller, thereby achieving an insect-proof effect.

[0080] The structure of the box body 10, the box cover 20 and the box body fixing plate 30 of the present invention and the way they cooperate with each other can not only meet the relevant functions of the electrical box, but also greatly improve the fire prevention, insect prevention, space occupied and installation efficiency of the electrical box.

[0081] Example 4

[0082] This embodiment describes the indoor unit of the present invention in detail.

[0083] The indoor unit of this embodiment includes the electrical appliance box of any technical solution in Embodiments 1 to 3.

[0084] The indoor unit of this embodiment includes the electrical box of any one of the technical solutions in Embodiments 1 to 3. Since the electrical box has good fireproof performance, the indoor unit of this embodiment also has good fireproof performance, and electrical safety is improved.

[0085] According to a preferred embodiment, the electrical box is arranged at the middle and lower part of the indoor unit. Preferably, the middle and lower part of the indoor unit refers to a position that can be directly touched by the staff.

[0086] In the indoor unit of the preferred technical solution of this embodiment, the electrical box is arranged in the lower middle part of the indoor unit. On the one hand, it is convenient for the staff to carry out disassembly and installation, repair of the main board, and patch cords after sales. On the other hand, the connecting wires of the electrical components do not need to be routed upward to the main board of the electrical box, which solves the problem that the electrical box is arranged on the top of the indoor unit in the prior art, which is inconvenient for the staff to operate after sales and the wiring is messy and unsightly.

[0087] Example 5

[0088] This embodiment describes the air conditioner of the present invention in detail.

[0089] The air conditioner of this embodiment includes the indoor unit of any technical solution in Example 4.

[0090] The air conditioner of this embodiment includes the indoor unit of any technical solution in Example 4. Since the indoor unit has good fire resistance, the air conditioner of this embodiment also has good fire resistance, and electrical safety is improved.

[0091] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An electrical box, characterized in that: The invention comprises a box body (10), a box cover (20), a box body fixing plate (30) and a PCB fixing plate (40), wherein the box body (10) is fixedly connected to the box body fixing plate (30), the PCB fixing plate (40) is located inside the box body (10), and The box cover (20) is provided with a step-shaped structure, and when the box cover (20) is covered on the box body (10), a fireproof structure is formed between the step-shaped structure and the box body (10), the box body fixing plate (30) and / or the PCB fixing plate (40); The step-like structure comprises a first step-like structure (201), the end of the box body fixing plate (30) is arranged as a box-like structure, the box-like structure is located in front of the outlet, and the first step-like structure (201) cooperates with the box-like structure, so that a first fireproof structure is formed between the first step-like structure (201) and the box-like structure; The step-like structure comprises a second step-like structure (202), a slot structure is formed between the side of the box body (10) and the side of the PCB fixing plate (40), and the second step-like structure (202) is snapped into the slot structure, so that a second fireproof structure is formed between the second step-like structure (202), the side of the box body (10) and the side of the PCB fixing plate (40).

2. The electrical box according to claim 1, characterized in that: The box-shaped structure comprises a first plate body (301), a second plate body (302) and a third plate body (303), wherein the first plate body (301) and the third plate body (303) are located on both sides of the second plate body (302) and extend in opposite directions. Furthermore, the third plate body (303) is in contact with the side wall of the box body (10) and is fixedly connected to the box body (10); a gap is maintained between the first plate body (301) and the side wall of the box body (10), so that a wire passage is formed between the first plate body (301) and the side wall of the box body (10).

3. The electrical box according to claim 2, characterized in that: The first plate body (301) is provided with a first guide portion (3011), the first guide portion (3011) is inclined in the direction of the wire passage, and the first step-shaped structure (201) is assembled above the box-shaped structure via the first guide portion (3011).

4. The electrical box according to claim 1, characterized in that: The PCB fixing plate (40) is connected to the box body (10) via a first buckle assembly, wherein: The first buckle assembly comprises a first buckle (401) located on the side wall of the PCB fixing plate (40) and a first clamping groove (101) located on the side wall of the box body (10).

5. The electrical box according to claim 1, characterized in that: The upper edge of the PCB fixing plate (40) is lower than the upper edge of the box body (10).

6. The electrical box according to claim 1, characterized in that: The PCB fixing plate (40) is provided with a yielding portion (402), and the box body (10) is provided with a second guiding portion (102), wherein the second guiding portion (102) is an inclined surface structure inclined toward the inside of the box body (10).

7. The electrical box according to claim 1, characterized in that: The box cover (20) is fixedly connected to the box body (10), the box body fixing plate (30) and the PCB fixing plate (40) respectively by means of a first screw assembly (203), a second screw assembly (204) and a third screw assembly (205).

8. The electrical box according to claim 1, characterized in that: The wire outlet is arranged on the PCB fixing plate (40), and the bottom of the wire outlet is lower than the main board (60) in the PCB fixing plate (40).

9. The electrical box according to claim 1, characterized in that: It also comprises a wire trough (50), which is arranged at the wire outlet on the PCB fixing plate (40), and the wire trough (50) is connected to the PCB fixing plate (40) via a second buckle assembly.

10. The electrical box according to claim 9, characterized in that: The second buckle assembly comprises second buckles (501) located on both sides of the wire trough (50) and mounting holes (403) located on both sides of the wire outlet on the PCB fixing plate (40); the wire trough (50) is fixed to the wire outlet on the PCB fixing plate (40) by snapping the second buckles (501) into the mounting holes (403).

11. The electrical box according to claim 9, characterized in that: The PCB fixing plate (40) is also provided with a retaining edge structure, the retaining edge structure comprising a first retaining edge (404) and a second retaining edge (405), wherein the first retaining edge (404) is located on both sides of the wire outlet, and the second retaining edge (405) is located on both sides of the second buckle assembly.

12. The electrical box according to claim 9, characterized in that: The PCB fixing plate (40) is also provided with a rib assembly, the rib assembly being arranged on a side of the PCB fixing plate (40) close to the box body (10), and the height of the rib assembly protruding from the PCB fixing plate (40) is greater than the height of the second buckle (501) protruding from the PCB fixing plate (40).

13. The electrical box according to claim 9, characterized in that: A first guide plate (502) and a second guide plate (503) are respectively arranged on both sides of the opening of the wire passing groove (50), a gap is provided between the first guide plate (502) and the second guide plate (503) to form a wire passing channel, and the inclined surfaces of the first guide plate (502) and the second guide plate (503) are arranged opposite to each other.

14. The electrical box according to claim 9, characterized in that: A plurality of first clamping plates (504) and a second clamping plate (505) are respectively arranged on both sides of the wire passing groove (50), and a gap is provided between the end of the first clamping plate (504) and the end of the second clamping plate (505) to form a wire passing channel.

15. An indoor unit, characterized in that: The invention comprises the electrical box as claimed in any one of claims 1 to 14.

16. An air conditioner, characterized in that: Includes the indoor unit according to claim 15.

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