CN219868161U - Indoor unit of air conditioner - Google Patents

Abstract

The utility model relates to an air conditioner indoor unit, which belongs to the technical field of air conditioning equipment, and comprises: the indoor heat exchanger comprises a shell, an air conditioner fan, an indoor heat exchanger, an electric boxing, a first wiring groove, a containing cavity, a connecting groove and electric wires, wherein an air conditioner air channel is arranged in the shell, and an air conditioner air outlet communicated with the air conditioner air channel is formed in the outer wall of the shell; the air conditioner fan is arranged in the shell and is used for conveying air-conditioning air to the indoor through the air conditioner air duct and the air conditioner air outlet; the indoor heat exchanger is arranged in the shell, and heat exchange is carried out between the refrigerant flowing in the indoor heat exchanger and the air to form a heating cycle or a refrigerating cycle; an electric box cover is arranged on the electric box; the first wiring groove is arranged at one side of the electric installation box cover; the accommodating cavity is arranged on the electric installation box cover; the connecting groove is formed in the inner wall of the accommodating cavity; the electric wire is arranged on the shell, passes through the first wiring groove and winds the accommodating cavity and then passes through the connecting groove.

Description

Indoor unit of air conditioner

Technical Field

The utility model relates to the technical field of air conditioning equipment, in particular to an air conditioning indoor unit.

Background

Currently, an air conditioner is an apparatus for adjusting and controlling parameters such as temperature, humidity, and flow rate of ambient air in a building or structure by using an artificial means. An air conditioner generally includes an air conditioner indoor unit and an air conditioner outdoor unit.

The indoor unit of the air conditioner is provided with an electric box and a panel, and the electric box is provided with wires in an extending mode and is used for being connected with the panel. Be provided with the buckle on the air conditioner indoor set among the prior art, the buckle is used for spacing fixedly to the electric wire. The buckle is generally higher than the surface of the electric box, so that the thickness of the whole air conditioner indoor unit is larger, the user experience is influenced, and the cost is higher.

Disclosure of Invention

The present utility model solves at least one of the technical problems in the related art to a certain extent.

Therefore, the utility model aims to provide the air conditioner indoor unit, the electric box cover is provided with the first wiring groove, the accommodating groove and the connecting groove, the electric wires are distributed through the first wiring groove, the accommodating groove and the connecting groove, and the electric box is not required to be provided with a buckle for fixing the electric wires, so that the thickness of the shell is reduced, and the cost is reduced.

In order to achieve the above object, the present utility model provides an indoor unit of an air conditioner, comprising:

the air conditioner comprises a shell, wherein an air conditioner air channel is arranged in the shell, and an air conditioner air outlet communicated with the air conditioner air channel is formed in the outer wall of the shell;

the air conditioner fan is arranged in the shell and is used for conveying air-conditioning air to the indoor through the air conditioner air duct and the air conditioner air outlet;

an indoor heat exchanger provided in the casing, wherein heat exchange is performed between a refrigerant flowing in the indoor heat exchanger and air to form a heating cycle or a cooling cycle;

the electric boxing box is provided with an electric boxing box cover;

the first wiring groove is arranged on one side of the electric installation box cover;

the accommodating cavity is arranged on the electric installation box cover;

the connecting groove is formed in the inner wall of the accommodating cavity;

the electric wire is arranged in the shell, passes through the first wiring groove and is coiled in the accommodating cavity and then passes through the connecting groove.

In technical scheme, first wiring groove, holding tank and spread groove have been seted up on the electricity dress box covers, and the electric wire passes through first wiring groove, holding tank and spread groove distribution, need not be provided with the buckle alone on the electricity dress box and be used for fixed electric wire, reduces the thickness of casing, reduce cost.

In some embodiments of the utility model, the shell is provided with an electric control board and a panel; and two ends of the electric wire are respectively and electrically connected with the electric control plate and the panel.

In some embodiments of the utility model, the wire comprises a first connection wire and a second connection wire; one end of the first connecting wire is electrically connected with the panel, and one end of the second connecting wire is electrically connected with the electric control board; the first connecting wire is far away from one end of the panel and one end of the second connecting wire far away from the electric control board are electrically connected through the plug.

In some embodiments of the present utility model, the first connection line passes through the first wiring groove and extends into the accommodating cavity, the second connection line passes through the connection groove and extends into the accommodating cavity, and the plug for interconnecting the first connection line and the second connection line is located in the accommodating cavity.

In some embodiments of the present utility model, the first wiring groove includes a bottom plate and a side plate, the bottom plate is disposed on one side of the electric box cover, the side plate is disposed on one side of the bottom plate away from the electric box cover, and the first wiring groove is formed among the side plate, the bottom plate and the electric box cover.

In some embodiments of the present utility model, a pressing plate is disposed on a side of the first wiring groove away from the bottom plate, and the electric wire is located between the pressing plate and the bottom plate.

In some embodiments of the present utility model, the pressing plate is disposed at intervals along the length direction of the first wiring groove.

In some embodiments of the utility model, the connecting groove penetrates through one end of the corresponding side wall of the accommodating cavity, which is far away from the shell.

In some embodiments of the present utility model, a second wire slot is formed in the housing, and the electric wire passes through the second wire slot and then enters the first wire slot.

In some embodiments of the present utility model, the electric box cover is located inside the casing, and an opening is formed on one side of the casing corresponding to the electric box cover; the opening is provided with a cover plate.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic view of an overall structure of an indoor unit of an air conditioner according to an embodiment of the present utility model;

fig. 2 is a front view of an indoor unit of an air conditioner according to an embodiment of the present utility model;

fig. 3 is a partial schematic structure of an indoor unit of an air conditioner according to an embodiment of the present utility model;

fig. 4 is a partial schematic structural view of an indoor unit of an air conditioner according to an embodiment of the present utility model;

FIG. 5 is a schematic view of the structure of an electric box cover according to an embodiment of the present utility model;

FIG. 6 is a front view of an electrical cassette cover according to an embodiment of the utility model;

FIG. 7 is a schematic view of another view of an electrical component box cover according to an embodiment of the present utility model;

FIG. 8 is a rear view of an electrical cassette cover according to an embodiment of the utility model;

fig. 9 is a schematic view of an overall structure of an indoor unit of an air conditioner according to an embodiment of the present utility model;

fig. 10 is a schematic view of an overall structure of an indoor unit of an air conditioner according to an embodiment of the present utility model.

In the above figures: 100. a housing; 200. an indoor heat exchanger; 300. an electric box; 400. an electric box cover is arranged; 500. a first wiring groove; 501. a side plate; 502. a bottom plate; 600. a pressing plate; 700. a receiving chamber; 800. a connecting groove; 900. a second wiring groove; 110. and a cover plate.

Detailed Description

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the present utility model, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or in communication with each other, for example; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The present utility model will be specifically described below by way of exemplary embodiments. It is to be understood that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the present utility model, an air conditioning indoor unit performs a refrigeration cycle of an air conditioning case by using a compressor, a condenser, an expansion valve, and an indoor heat exchanger. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies a refrigerant to the air that has been conditioned and heat exchanged. The compressor compresses refrigerant gas in a low-temperature and low-pressure state and discharges refrigerant gas in a high-temperature and high-pressure state. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process. The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The indoor heat exchanger evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low temperature and low pressure state to the compressor. The indoor heat exchanger may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of vaporization of a refrigerant. The air conditioning case can adjust the temperature of the indoor space throughout the cycle. The outdoor unit of the air conditioner case refers to a portion of the refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner case includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit. The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an indoor heat exchanger. When the indoor heat exchanger is used as a condenser, the air-conditioning case serves as a heater of the heating mode, and when the indoor heat exchanger is used as the indoor heat exchanger, the air-conditioning case serves as a cooler of the cooling mode.

Hereinafter, embodiments of the present utility model will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 5, in an exemplary embodiment of an air conditioning indoor unit according to the present utility model, the air conditioning indoor unit includes: the indoor heat exchanger comprises a shell 100, an air conditioner fan, an indoor heat exchanger 200, an electric boxing 300, a first wiring groove 500, a containing cavity 700, a connecting groove 800 and electric wires, wherein an air conditioner air channel is arranged in the shell 100, and an air conditioner air outlet communicated with the air conditioner air channel is formed in the outer wall of the shell 100; the air-conditioning fan is arranged in the shell 100 and is used for conveying air-conditioning wind into the room through the air-conditioning air duct and the air-conditioning air outlet; the indoor heat exchanger 200 is installed in the casing 100, and heat exchange is performed between the refrigerant flowing inside the indoor heat exchanger 200 and air to form a heating cycle or a cooling cycle; the electric box 300 is provided with an electric box cover 400; the first wiring groove 500 is arranged at one side of the electric box cover 400; the accommodating cavity 700 is arranged on the electric box cover 400; the connecting groove 800 is formed on the inner wall of the accommodating cavity 700; the electric wire is disposed in the housing 100, and passes through the connection groove 800 after passing through the first wiring groove 500 and being wound around the receiving cavity 700.

Both the electrical box 300 and the electrical box cover 400 are disposed in the housing 100, so that the thickness of the electrical box 300 affects the thickness of the housing 100. In the prior art, the outer part of the electric box cover 400 is separately provided with the buckle, so that the thickness of the electric box cover 400 is thicker, and the overall thickness of the casing 100 needs to be increased together, so that the material cost is increased. Through the above scheme of the present utility model, the electrical box cover 400 is provided with the first wiring groove 500, the accommodating groove and the connecting groove 800, and the wires are distributed through the first wiring groove 500, the accommodating groove and the connecting groove 800, so that no separate buckle is required to be provided on the electrical box 300 for fixing the wires. The thickness of the electrical box cover 400 is reduced, and thus the thickness of the housing 100 is reduced, thereby reducing costs.

In some embodiments, the housing 100 has an electrical control board and a faceplate disposed thereon; the two ends of the electric wire are respectively and electrically connected with the electric control plate and the panel. The user is connected the panel and the electric control board electricity through the electric wire, can be for electric control board transmission signal through the panel to realize the control to the air conditioner.

In some embodiments, the housing 100 is mounted to a wall surface, and the side of the housing 100 facing away from the wall surface is a front side, and the front side of the housing 100 is mounted with a cover plate. The faceplate is positioned between the cover plate and the housing 100 and the electronic control board is positioned within the electrical enclosure 300. The electric wires sequentially pass through the first wiring groove 500, the accommodating cavity 700 and the connecting groove 800 after passing through the panel, and then extend into the electric box 300 to be connected with the electric control board.

In some embodiments, the electrical wire includes a first connection wire and a second connection wire; one end of the first connecting wire is electrically connected with the panel, and one end of the second connecting wire is electrically connected with the electric control board; one end of the first connecting wire far away from the panel and one end of the second connecting wire far away from the electric control board are electrically connected through the plug. And the first connecting wire is connected with the second connecting wire by using the plug, so that the electric connection of the electric control board and the panel is completed.

In some embodiments, the indoor unit of the air conditioner is an on-hook, and the housing 100 is disposed horizontally. The panel is located at the center of the front side of the housing 100. The electrical enclosure 300 is located at one end of the housing 100. One end of the first connecting wire is electrically connected with the panel, and the other end of the first connecting wire extends toward the electric box 300, passes through the first wiring groove 500 and extends into the accommodating cavity 700. One end of the second connecting wire is located in the electric box 300 and is electrically connected with the electric control board, the other end of the second connecting wire penetrates through the connecting groove 800 and extends into the accommodating cavity 700, and a plug for connecting the first connecting wire and the second connecting wire is located in the accommodating cavity 700. A portion of the first connection wire, the plug, and a portion of the second connection wire are coiled in the accommodating chamber 700. The part that the electric wire is many is rolled up in holding chamber 700, holds chamber 700 and is used for storing the electric wire, avoids the electric wire to spill occupation space, or the electric wire wearing and tearing damage improves the stability of structure.

Referring to fig. 5 to 8, in some embodiments, the first wiring groove 500 includes a bottom plate 502 and a side plate 501, the bottom plate 502 is disposed on one side of the electrical box cover 400, the side plate 501 is disposed on one side of the bottom plate 502 away from the electrical box cover 400, and the first wiring groove 500 is formed among the side plate 501, the bottom plate 502 and the electrical box cover 400.

In some embodiments, the electrical box cover 400 is disposed vertically, and a width direction of one side of the electrical box cover 400 toward the panel is disposed along a front-rear direction of the case 100. The side plate 501 is vertically arranged, and the side plate 501 is parallel to the side of the electric box 300 facing the panel. The bottom plate 502 is located on a side of the housing 100 remote from the panel. The bottom plate 502, the side plate 501 and the electric box cover 400 are integrally formed. The first wiring groove 500 is vertically disposed.

In some embodiments, the length direction of the first connecting line is set along the length direction of the housing 100, one end of the first connecting line away from the panel extends to the upper side of the first wiring groove 500 and is bent downwards to extend into the first wiring groove 500, the accommodating cavity 700 is located below the first wiring groove 500, and the connecting groove 800 is opened at the inner top wall of the accommodating cavity 700.

In some embodiments, a platen 600 is disposed on a side of the first wire chase 500 remote from the base plate 502, with wires between the platen 600 and the base plate 502. The first connection line passes through the first wire groove 500 and is located between the pressing plate 600 and the bottom plate 502, thus preventing the first connection line from being separated from the first wire groove 500, improving structural stability.

In some embodiments, the platen 600 is secured to a side of the side plate 501 remote from the bottom plate 502. The pressing plate 600 extends to one side of the electrical box cover 400, and the pressing plate 600 is spaced apart from the electrical box cover 400 by a certain distance.

In some embodiments, the platen 600 is secured to the side of the electrical box cover 400 facing the side plate 501. The pressing plate 600 extends to one side of the side plate 501, and the pressing plate 600 is spaced apart from the side plate 501 by a certain distance.

In some embodiments, the platen 600 is provided with a plurality of grooves spaced apart along the length direction of the first wiring groove 500.

In some embodiments, two pressure plates 600 are provided, one pressure plate 600 being secured to the top end of the side plate 501 and the other pressure plate 600 being secured to the bottom end of the electrical box cover 400 toward the side plate 501.

In some embodiments, two pressing plates 600 are provided, one pressing plate 600 is fixed to the bottom end of the side plate 501, and the other pressing plate 600 is fixed to the top end of the electrical box cover 400 facing the side plate 501.

In some embodiments, the platens 600 are two and symmetrically disposed, with a gap disposed between the two platens 600. The first connection line can be placed in the first wiring groove 500 through two gaps.

In some embodiments, the connection slot 800 extends through an end of the corresponding sidewall of the receiving chamber 700 remote from the housing 100. The second connection wire does not need to pass through the connection groove 800 with the end portions, and the middle portion of the second connection wire may be directly placed in the connection groove 800.

Referring to fig. 9 and 10, in some embodiments, a second wire groove 900 is formed in the housing 100, and the wires pass through the second wire groove 900 and then enter the first wire groove 500. The second wiring groove 900 is disposed along the length direction of the housing 100 and is opened on the outer wall of the housing 100. The first connection line is located in the second wire groove 900, and the first connection line is bent downward after passing through the second wire groove 900 and passes through the first wire groove 500.

In some embodiments, the electric box cover 400 is located inside the casing 100, and an opening is formed on one side of the casing 100 corresponding to the electric box cover 400; a cover plate 110 is provided at the opening. The opening of the housing 100 is closed by the through cover 110, so that leakage caused by the exposure of the electric wires is avoided, and the safety is improved.

In some embodiments, the indoor heat exchanger 200 is disposed inside the casing 100, and the length direction of the indoor heat exchanger 200 is disposed along the length direction of the casing 100. The electrical box 300 is located within the housing 100 and at one end of the indoor heat exchanger 200. The opening of the electrical box 300 is formed on the side of the casing 100 facing away from the wall, and the electrical box cover 400 is used for closing the opening of the electrical box 300.

In some embodiments, electrical enclosure cover 400 is coupled to housing 100 via a threaded connection. The electrical box cover 400 is provided with threaded holes, and the threaded connection includes, but is not limited to, bolts and screws. The threaded connection member penetrates through the outer wall of the housing 100, and the threaded connection member penetrates through one end of the housing 100 and is in threaded connection with the threaded hole.

In some embodiments, the threaded holes are spaced apart on the electrical box cover 400. The number of the threaded connectors is the same as that of the threaded holes and the threaded connectors are arranged in one-to-one correspondence. The plurality of screw connectors connect the housing 100 with the electrical box cover 400, improving structural strength.

In some embodiments, the indoor heat exchanger 200 is disposed within an air conditioning duct and on one side of the input of an air conditioning fan. When the air conditioning fan rotates, the air flow is exchanged heat when passing through the indoor heat exchanger 200 and then is output through an air outlet of the air conditioner.

In some embodiments, an air-conditioning grille is arranged at the air-conditioning air outlet, and the air guiding direction of the air-conditioning grille is the same as the opening direction of the air-conditioning air outlet. Air-conditioning air passing through an air outlet of the air conditioner is guided through the air-conditioning grille, so that the diffusion of the air-conditioning air is reduced, and the user experience is improved.

In some embodiments, the air-conditioning grille comprises an air-conditioning grille plate, the length direction of the air-conditioning grille plate is vertically arranged, and the top and the bottom of the air-conditioning grille plate are respectively connected with the inner top wall and the inner bottom wall of the air-conditioning air outlet. The width direction of the air conditioner grid plate is the same as the opening direction of the air conditioner air outlet, air conditioner wind passing through the air conditioner air outlet contacts the air conditioner grid plate, and the turbulent flow contacts the air conditioner grid plate and is guided by the air conditioner grid plate to be output.

In some embodiments, a plurality of air conditioning louvers are disposed at intervals along the width direction of the air outlet of the air conditioner. The plurality of air conditioner grid plates guide the air conditioner wind passing through the air outlet of the air conditioner, and the guiding effect on the air conditioner wind is improved.

In some embodiments, the spacing of any adjacent two air conditioning grids is the same. So that the air-conditioning air output through the air outlet of the air-conditioner uniformly enters the room.

In some embodiments, an air guide plate is arranged at the air outlet of the air conditioner, a plurality of air guide plates are arranged at intervals along the vertical direction, and the air guide plates are turned up and down to control the wind direction of air-conditioning wind passing through the air outlet of the air conditioner. The air guide plate is connected with the air conditioner grid, and air conditioner wind contacts the air guide plate when passing through the air guide plate and is output along the inclined direction of the air guide plate. The wind direction of the vertical direction of air conditioner wind is adjusted through the air deflector, so that a user can select to use according to requirements, and user experience is improved.

In some embodiments, an air deflector is connected to each air conditioning grid, the air deflector being flipped over to control the air outlet direction of the conditioned air. In some embodiments, the number of air deflectors is a plurality of air deflectors spaced apart in the height direction, and the plurality of air deflectors remain parallel in any state. The guiding effect on the air conditioner wind is improved through a plurality of air deflectors.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. An indoor unit of an air conditioner, comprising:

the air conditioner comprises a shell, wherein an air conditioner air channel is arranged in the shell, and an air conditioner air outlet communicated with the air conditioner air channel is formed in the outer wall of the shell;

the air conditioner fan is arranged in the shell and is used for conveying air-conditioning air to the indoor through the air conditioner air duct and the air conditioner air outlet;

an indoor heat exchanger provided in the casing, wherein heat exchange is performed between a refrigerant flowing in the indoor heat exchanger and air to form a heating cycle or a cooling cycle;

the electric boxing box is provided with an electric boxing box cover;

the first wiring groove is arranged on one side of the electric installation box cover;

the accommodating cavity is arranged on the electric installation box cover;

the connecting groove is formed in the inner wall of the accommodating cavity;

the electric wire is arranged in the shell, passes through the first wiring groove and is coiled in the accommodating cavity and then passes through the connecting groove.

2. The indoor unit of claim 1, wherein the housing is provided with an electrical control board and a panel; and two ends of the electric wire are respectively and electrically connected with the electric control plate and the panel.

3. The indoor unit of claim 2, wherein the electric wire includes a first connection wire and a second connection wire; one end of the first connecting wire is electrically connected with the panel, and one end of the second connecting wire is electrically connected with the electric control board; the first connecting wire is far away from one end of the panel and one end of the second connecting wire far away from the electric control board are electrically connected through the plug.

4. An indoor unit for an air conditioner according to claim 3, wherein the first connection line passes through the first wiring groove and extends into the accommodation chamber, the second connection line passes through the connection groove and extends into the accommodation chamber, and the plug connecting the first connection line and the second connection line to each other is located in the accommodation chamber.

5. The indoor unit of claim 1, wherein the first wiring groove comprises a bottom plate and a side plate, the bottom plate is disposed on one side of the electric box cover, the side plate is disposed on one side of the bottom plate away from the electric box cover, and the side plate, the bottom plate and the electric box cover form the first wiring groove therebetween.

6. The indoor unit of claim 5, wherein a side of the first wiring duct remote from the base plate is provided with a pressure plate, and the electric wire is located between the pressure plate and the base plate.

7. The indoor unit of claim 6, wherein the plurality of pressure plates are spaced apart along a length of the first wire chase.

8. An indoor unit according to any one of claims 1-7, wherein the connecting groove penetrates through one end of the corresponding side wall of the accommodating chamber, which is far away from the casing.

9. An indoor unit of air conditioner according to any one of claims 1-7, wherein the housing is provided with a second wiring groove, and the electric wire passes through the second wiring groove and then enters the first wiring groove.

10. The indoor unit of any one of claims 1-7, wherein the electrical box cover is located inside the casing, and an opening is formed in the casing at a side corresponding to the electrical box cover; the opening is provided with a cover plate.