CN217357170U - Indoor unit of refrigerating device - Google Patents

Abstract

An indoor unit of a refrigeration device includes: an indoor fan; a housing having: the first side plate and the second side plate extend along the height direction of the shell, and an air supply outlet of the indoor fan is formed between the first side plate and the second side plate; a stent, comprising: the first upright column and the second upright column extend along the height direction of the shell and are symmetrically arranged; a first extension part extending downwards from the top end of the bracket along the height direction of the shell; the second extension part extends upwards from the bottom end of the bracket along the height direction of the shell, and the air supply outlet is positioned between the first extension part and the second extension part; one end of the first side plate is detachably and fixedly connected with the first upright column, and the other end of the first side plate is detachably and fixedly connected with the first extending part and the second extending part; one end of the second side plate is detachably and fixedly connected with the second upright post, and the other end of the second side plate is fixedly connected with the first extending part and the second extending part; the first side plate and the second side plate are formed by punching and molding aluminum or aluminum alloy. The utility model discloses can ensure that the indoor unit outward appearance is complete pleasing to the eye, avoid appearing the inhomogeneous condition of goods tissue performance.

Description

Indoor unit of refrigerating device

Technical Field

The utility model belongs to the technical field of air conditioning equipment, especially, relate to a refrigerating plant's indoor unit.

Background

In recent years, due to the pursuit of miniaturization and light weight in various industries, aluminum and aluminum alloy sections are widely applied to the industries of construction, transportation, electronic and electrical products, aerospace and the like.

The traditional aluminium and aluminium alloy section bar usually adopts the extrusion forming process, namely, strong pressure is applied to the metal blank placed in the die cavity (or extrusion cylinder), so that the metal blank is forced to generate directional plastic deformation and is extruded from the die hole of the extrusion die, and thus, the part or semi-finished product with the required section shape and size and certain mechanical property is obtained. The process is more suitable for producing rod, pipe, mould and wire products with simple cross-sectional shapes. When the shell of the refrigerating device, especially the indoor unit of the split type vertical air conditioner, is made of aluminum or aluminum alloy material, the required area is large, so that the structure performance of the product is uneven, namely, the flow of metal is uneven during extrusion, so that the structure performance of the surface layer and the center, the head and the tail of the extruded product is uneven, and the production stability is not ideal. To overcome this problem, plastic frameworks with a relatively large area are required to be provided to form a face support for the panel members, and the panel members and the plastic frameworks are required to be connected by additional connecting members, which increases the product cost.

Disclosure of Invention

The utility model discloses to the refrigerating plant's that is made by extrusion process among the prior art indoor unit shell, because the required area is great, it is inhomogeneous to appear goods organizational performance easily, need form a complete set to set up the plastic skeleton that the area is suitable in order to form the face to support the component, still need connect through additional connecting element between plate element and the plastic skeleton, increase product cost's problem, design and provide a refrigerating plant's indoor unit.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:

an indoor unit of a refrigeration device, comprising: an indoor fan configured to supply air to an air-conditioned room; a housing having: a first side plate extending in a height direction of the housing; a second side plate extending in a height direction of the case; an air supply outlet of the indoor fan is formed between the first side plate and the second side plate; a stent, comprising: a first pillar extending in a height direction of the housing; the second upright post extends along the height direction of the shell and is symmetrically arranged with the first upright post; a first extension part extending downward from a top end of the bracket in a height direction of the housing; the second extension part extends upwards from the bottom end of the support along the height direction of the shell, and the air supply outlet is positioned between the first extension part and the second extension part; one end of the first side plate is detachably and fixedly connected with the first upright column, and the other end of the first side plate is detachably and fixedly connected with the first extending part and the second extending part respectively; one end of the second side plate is fixedly connected with the second upright column in a detachable mode, and the other end of the second side plate is fixedly connected with the first extending part and the second extending part respectively; the first side plate and the second side plate are formed by aluminum or aluminum alloy in a stamping mode.

Furthermore, a plurality of first clamping jaws are formed at two ends of the first side plate respectively, and the first clamping jaws and the first side plate are integrally formed by aluminum or aluminum alloy in a punching and forming mode; the both ends of second curb plate are formed with a plurality of second jack catchs respectively, the second jack catch with the integrative stamping forming of second curb plate is made by aluminium or aluminum alloy.

Furthermore, a plurality of first assembling grooves are formed in the first upright column, the first extending part and the second extending part respectively, and the first assembling grooves are matched with the first clamping jaws; and a plurality of second assembling grooves are formed on the second upright column, the second extending part and the second extending part respectively, and the second assembling grooves are matched with the second clamping jaws.

Further, the first assembling groove is provided with a first guiding part, the first guiding part is formed at the edge of the first assembling groove, the first guiding part is provided with a tapered caliber, and the tail end of the first guiding part is matched with the tail end of the first clamping jaw; the second assembling groove is provided with a second guiding part, the second guiding part is formed at the edge of the second assembling groove and provided with a reduced caliber, and the tail end of the second guiding part is matched with the tail end of the second clamping jaw.

Further, the first side plate is provided with a first end wall, a second end wall and a third end wall which are formed by continuous bending, and the first clamping jaw is formed on the third end wall; the first side plate is provided with a first positioning part, the first positioning part is formed on the third end wall, and the extending direction of the first positioning part is perpendicular to the extending direction of the shell; the first positioning part is detachably and fixedly connected with the support.

Further, the second side plate is provided with a fourth end wall, a fifth end wall and a sixth end wall which are formed by continuous bending, and the second claw is formed on the sixth end wall; the second side plate is also provided with a second positioning part, the second positioning part is formed on the sixth end wall, and the extending direction of the second positioning part is perpendicular to the extending direction of the shell; the second positioning part is detachably and fixedly connected with the support.

Further, the housing further has: the extending direction of the first supporting plate is perpendicular to the extending direction of the shell; a plurality of first backup pads interval fixed settings are in the dorsal part of first curb plate.

Furthermore, one end of the first supporting plate extends into a first positioning groove formed by the first end wall and the second end wall in a surrounding mode, and the other end of the first supporting plate is detachably and fixedly connected with the first side plate.

Further, the housing further has: a second support plate having an extending direction perpendicular to an extending direction of the case; the plurality of second supporting plates are fixedly arranged on the back side of the second side plate at intervals.

Furthermore, one end of the second supporting plate extends into a second positioning groove formed by the fourth end wall and the fifth end wall, and the other end of the second supporting plate is detachably and fixedly connected with the second side plate.

Compared with the prior art, the utility model discloses an advantage is with positive effect:

the utility model discloses an aspect utilizes the aluminium system of stamping forming or aluminium alloy to make first curb plate and second curb plate to constitute the surface of indoor unit, can expand the decorative effect of air conditioner product, and first curb plate and second curb plate are easily retrieved, have more environmental protection's advantage than traditional plastic panel; on the other hand, the appearance of the indoor unit can be ensured to be uniform, and the condition that the product organization performance is not uniform is avoided; the third aspect then adopts the skeleton of frame-type design to realize the installation and the supply-air outlet design of first curb plate and second curb plate, compares in prior art and has reduced product cost.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of an indoor unit of a refrigeration apparatus provided by the present invention;

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is a schematic view showing a structure of a bracket in the indoor unit shown in fig. 1;

fig. 4 is a schematic structural view of a first side plate in the indoor unit shown in fig. 1;

FIG. 5 is an enlarged partial schematic view of FIG. 4;

fig. 6 is a schematic structural view of a second side plate in the indoor unit shown in fig. 1;

FIG. 7 is an enlarged partial schematic view of FIG. 6;

fig. 8 is a sectional view of a first side plate in the indoor unit shown in fig. 1;

fig. 9 is a partially enlarged view illustrating a second support pillar in the indoor unit shown in fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

It is to be understood that in the description of the present invention, the terms "central," "longitudinal," "lateral," "length," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientation or positional relationship shown in the drawings, which is for convenience of description only, and which is not intended to indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "disposed," and "connected" are to be construed broadly and can include, for example, fixed or removable connections or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Aiming at the problems that the required area of an indoor unit shell of a refrigerating device manufactured by an extrusion process in the prior art is large, the product structure performance is easy to be uneven, a plastic framework with the same area needs to be arranged in a matched mode to support an element forming surface, and the plate element and the plastic framework need to be connected through an additional connecting element, so that the product cost is increased, the indoor unit of the refrigerating device is designed and provided as shown in figures 1 to 9. Specifically, the indoor unit 1 of the refrigeration apparatus of the present embodiment is used as the indoor unit 1 of the air conditioner, and the indoor unit 1 is designed to be vertical, that is, used on the floor. The air conditioner is a conventional split type air conditioner, and the outdoor unit and the indoor unit 1 are connected by a gaseous refrigerant pipe and a liquid refrigerant pipe and perform a vapor compression cycle.

The indoor unit 1 is configured to adjust the humidity and temperature of an air-conditioned room, and the indoor unit 1 is mainly provided with an indoor heat exchanger (not shown in the drawings) and an indoor fan (not shown in the drawings). The indoor fan includes a fan driven by a motor to suck and guide indoor air to an indoor heat exchanger, and refrigerant in the indoor heat exchanger is heat-exchanged with the indoor air to adjust temperature and humidity of the indoor air.

The housing of the indoor unit 1 is described with reference to fig. 1 to 9. The housing has a first side plate 11, a second side plate 12 and a bracket 14. The first side plate 11 and the second side plate 12 both extend along the height of the housing (as indicated by arrow H in fig. 1), and the length of the first side plate 11 and the second side plate 12 is approximately the same as the height of the housing so as to completely cover the front end surface of the housing. An air supply outlet 13 of the indoor fan is formed between the first side plate 11 and the second side plate 12. The rear side of the shell is provided with an air inlet grille 21, and a plurality of air inlets 22 are formed in the air inlet grille 21.

The support 14 is of a frame-type design and specifically includes a top cover 19, a base 20, a first upright 15, a second upright 16, a first extension 17, and a second extension 18. The first upright 15 and the second upright 16 each extend in the height direction of the housing and are fixed between the top cover 19 and the base 20, respectively. The first and second uprights 15, 16 are of a height approximately corresponding to the height of the shell to provide complete edge support for the first and second side panels 11, 12. The first upright 15 and the second upright 16 are of symmetrical design. The first extension 17 extends downward from the top end of the stand 14 in the height direction of the housing, specifically, from the top cover 19, and the second extension 18 extends upward from the bottom end of the stand 14 in the height direction of the housing, specifically, from the base 20. The holder 14 is preferably integrally formed of a hard material having a certain deformation allowance, such as plastic, resin, or the like.

One end of the first side plate 11 is detachably and fixedly connected with the first upright post 15, for example, in a clamping manner, and the other end is detachably and fixedly connected with the first extension portion 17 and the second extension portion 18, for example, in a clamping manner; the second side plate 12 has one end detachably and fixedly connected to the second upright 16, for example, in the form of a snap, and the other end detachably and fixedly connected to the first extension 17 and the second extension 18, respectively, for example, in the form of a snap. In the present embodiment, the first side plate 11 and the second side plate 12 are formed by punching aluminum or an aluminum alloy. The first side plate 11 and the second side plate 12 which are formed by punching have very good plasticity, can ensure smooth surfaces and is beneficial to downstream decoration processing technology. Compared with the prior art, the indoor unit 1 of the refrigeration device provided by the embodiment has the advantages that on one hand, the first side plate 11 and the second side plate 12 which are made of aluminum or aluminum alloy and formed by stamping form are used for forming the outer surface of the indoor unit 1, the decorative effect of an air conditioner product can be expanded, the first side plate 11 and the second side plate 12 are easy to recycle, and compared with the traditional plastic panel, the indoor unit 1 has the advantage of being more environment-friendly; on the other hand, the appearance of the indoor unit 1 can be ensured to be uniform, and the condition of uneven product organization performance is avoided; in the third aspect, the framework with the frame type design is adopted to realize the installation of the first side plate 11 and the second side plate 12 and the design of the air supply outlet 13, so that the product cost is reduced compared with the prior art.

As shown in fig. 4 to 7, a plurality of first claws 27 are respectively formed at both ends of the first side plate 11, and the first claws 27 and the first side plate 11 are integrally formed by press molding of aluminum or an aluminum alloy. Similarly, a plurality of second claws 35 are also formed on both ends of the second side plate 12, and the second claws 35 and the second side plate 12 are integrally formed by punching aluminum or an aluminum alloy. With this structural design, the number of parts of the indoor unit 1 is minimized. Since the texture of the aluminum product is relatively soft, minimizing the number of parts of the indoor unit 1 also minimizes the assembly work, avoiding scratches and external force damage during the assembly process.

The first claws 27 are respectively fitted with first fitting grooves 43 provided on the first pillar 15, the first extension 17 and the second extension 18, specifically: a plurality of first claws 27 extend into the first assembling grooves 43 on the first upright posts 15 respectively at one side to form the detachable fixed connection between the first side plate 11 and the first upright posts 15, and provide edge support at one side of the first side plate 11; the plurality of first claws 27 extend into the first assembling grooves 43 on the first extending part 17 and the second extending part 18 respectively on the other side to form the detachable fixed connection of the first side plate 11 and the first extending part 17 and the second extending part 18, and provide edge support for the other side of the first side plate 11. Similarly, the second claws 35 are respectively fitted into the second fitting grooves 44 provided on the second column 16, the first extension 17 and the second extension 18, specifically: a plurality of second claws 35 respectively extend into the second assembling grooves 44 on the second upright post 16 at one side to form the detachable fixed connection of the second side plate 12 and the second upright post 16 and provide edge support for one side of the second side plate 12; and a plurality of second claws 35 respectively extend into the second assembly grooves 44 on the first extension part 17 and the second extension part 18 on the other side to form the detachable fixed connection of the second side plate 12 and the first extension part 17 and the second extension part 18, and provide edge support for the other side of the second side plate 12.

The first jaw 27 and the second jaw 35 are preferably provided with reinforcing ribs on the surfaces thereof. First jack catch 27 and second jack catch 35 adopt downwardly extending and be the structure of similar L type (the stiff end is the tail end, and the free end is the head end), set up the strengthening rib in order to improve the mechanical strength of first jack catch 27 and second jack catch 35 at the bending position, avoid taking place to buckle at assembly process. Correspondingly, the first fitting groove 43 is preferably provided with a first guide portion formed at an edge of the first fitting groove 43. With the first jaw 27 extending downward and having a structure similar to an L-shape, a first guide portion is formed at the lower edge of the first fitting groove 43, and the first guide portion has a tapered caliber with respect to the whole first fitting groove 43. For example, the first fitting groove 43 is rectangular as a whole, the first guide portion is in a tapered shape communicating with the first fitting groove 43, when the first claw 27 extends into the first fitting groove 43, the first guide portion guides the first claw 27 to move downward, the end of the first guide portion is matched with the tail end of the first claw 27, and the first guide portion and the tail end of the first claw 27 are mutually clamped to avoid shaking of the first claw 27. Similarly, the second fitting groove 44 is preferably provided with a second guide portion formed at an edge of the second fitting groove 44. And a second guide part is formed at the lower edge of the second assembling groove 44 and has a tapered caliber relative to the whole second assembling groove 44, and the second guide part is matched with the structure of the second claw 35 which extends downwards and is similar to an L shape. For example, the second fitting groove 44 is rectangular as a whole, the second guide portion is in a tapered shape communicating with the second fitting groove 44, when the second jaw 35 extends into the second fitting groove 44, the second guide portion guides the second jaw 35 to move downward, and the second guide portion is engaged with the tail end of the second jaw 35 by the end of the computer portion to prevent the second jaw 35 from shaking.

The first side plate 11 and the second side plate 12 which are formed by punching may have burrs at the edges, and the overall texture of the product is affected by the exposure of the burrs. Therefore, in order to prevent burrs from being exposed, the first side plate 11 has a first end wall 24, a second end wall 25, and a third end wall 26 formed by bending continuously, and the first claws 27 are formed on the third end wall 26. The first, second and third end walls 24, 25, 26 may have a 90 degree included angle therebetween, or may take the form of an arcuate bend as shown. The first side plate 11 further has a first positioning portion 40, the first positioning portion 40 is formed on the third end wall 26, the extending direction of the first positioning portion 40 is perpendicular to the extending direction of the housing, and the first positioning portion 40 is detachably and fixedly connected with the bracket 14, preferably through a bolt. Screw hole 41 has been seted up on first locating part 40, and the horizontal design of first locating part 40 can be so that the bolt keeps away from the indoor heat exchanger in the casing, and the comdenstion water of avoiding indoor heat exchanger production leads to the bolt corrosion.

Correspondingly, the second side plate 12 has a fourth end wall 32, a fifth end wall 33 and a sixth end wall 35 which are formed by continuous bending, and the second jaw 35 is formed on the sixth end wall 35. The fourth, fifth and sixth end walls 32, 33, 35 may be angled at 90 degrees or may take the form of an arcuate bend as shown. The second side plate 12 further has a second positioning portion formed on the sixth end wall 35, the extending direction of the second positioning portion is perpendicular to the extending direction of the casing, and the second positioning portion is detachably fixedly connected with the bracket 14, preferably by bolts. The screw hole has been seted up on the second location portion, and the horizontal design of second location portion can make the bolt keep away from the indoor heat exchanger in the casing equally, avoids the comdenstion water that indoor heat exchanger produced to lead to the bolt corrosion. If the first side plate 11 and the second side plate 12 are designed to be larger in size, it is also optional to provide a third positioning portion 38 and a fourth positioning portion 39 below the first side plate 11 and the second side plate 12.

The housing also has a first support plate 23, the direction of extension of the first support plate 23 being perpendicular to the direction of extension of the housing. A plurality of first support plates 23 are fixedly disposed at intervals on the back side of the first side plate 11. The first support plate 23 is optionally made of sheet metal material. One end of the first support plate 23 extends into the first positioning groove formed by the first end wall 24 and the second end wall 25, and the other end is detachably and fixedly connected with the first side plate 11, for example, by bolts 42, and the connecting position is also preferably arranged on the continuously bent end walls 28 and 29 to hide edge burrs. The first support plate 23 may ensure structural strength of the first side plate 11.

Correspondingly, the housing may also be provided with a second support plate 31, the extension direction of the second support plate 31 also being perpendicular to the extension direction of the housing. A plurality of second support plates 31 are fixedly disposed at intervals on the back side of the second side plate 12. The second support plate 31 is optionally likewise made of sheet metal material. One end of the second supporting plate 31 extends into a second positioning groove formed by enclosing the fourth end wall 32 and the fifth end wall 33, and the other end is detachably and fixedly connected with the second side plate 12, for example, through a bolt 37, and the connecting position is also preferably arranged on the continuously bent end walls 30 and 36 to hide edge burrs, and the second supporting plate 31 can ensure the structural strength of the second side plate 12.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention, which is claimed.

Claims (10)

1. An indoor unit of a refrigeration device, comprising:

an indoor fan configured to supply air to an air-conditioned room;

a housing having:

a first side plate extending in a height direction of the housing;

a second side plate extending in a height direction of the case; an air supply outlet of the indoor fan is formed between the first side plate and the second side plate;

a stent, comprising:

a first column extending in a height direction of the housing;

the second upright post extends along the height direction of the shell and is symmetrically arranged with the first upright post;

a first extension part extending downward from a top end of the bracket in a height direction of the housing; and

the second extending part extends upwards from the bottom end of the support along the height direction of the shell, and the air supply outlet is positioned between the first extending part and the second extending part;

one end of the first side plate is detachably and fixedly connected with the first upright column, and the other end of the first side plate is detachably and fixedly connected with the first extending part and the second extending part respectively; one end of the second side plate is detachably and fixedly connected with the second upright column, and the other end of the second side plate is respectively and fixedly connected with the first extending part and the second extending part;

the first side plate and the second side plate are formed by aluminum or aluminum alloy in a stamping and forming mode.

2. The indoor unit of a cooling device as claimed in claim 1,

a plurality of first clamping jaws are formed at two ends of the first side plate respectively, and the first clamping jaws and the first side plate are integrally formed by aluminum or aluminum alloy in a punching mode;

the both ends of second curb plate are formed with a plurality of second jack catchs respectively, the second jack catch with the second curb plate is made by the integrative stamping forming of aluminium or aluminum alloy.

3. The indoor unit of a cooling device as claimed in claim 2,

a plurality of first assembling grooves are formed in the first upright column, the first extending part and the second extending part respectively, and the first assembling grooves are matched with the first clamping jaws;

and a plurality of second assembling grooves are formed in the second upright column, the second extending part and the second extending part respectively, and the second assembling grooves are matched with the second clamping jaws.

4. The indoor unit of a cooling device as claimed in claim 3,

the first assembling groove is provided with a first guiding part, the first guiding part is formed at the edge of the first assembling groove, the first guiding part is provided with a gradually-reduced caliber, and the tail end of the first guiding part is matched with the tail end of the first clamping jaw;

the second assembling groove is provided with a second guiding part, the second guiding part is formed at the edge of the second assembling groove and provided with a reduced caliber, and the tail end of the second guiding part is matched with the tail end of the second clamping jaw.

5. The indoor unit of a cooling device as claimed in claim 3,

the first side plate is provided with a first end wall, a second end wall and a third end wall which are formed by continuous bending, and the first claw is formed on the third end wall;

the first side plate further comprises a first positioning part which is formed on the third end wall, and the extending direction of the first positioning part is perpendicular to the extending direction of the shell; the first positioning part is detachably and fixedly connected with the support.

6. The indoor unit of a cooling device as claimed in claim 3,

the second side plate is provided with a fourth end wall, a fifth end wall and a sixth end wall which are formed by continuous bending, and the second claw is formed on the sixth end wall;

the second side plate is also provided with a second positioning part, the second positioning part is formed on the sixth end wall, and the extending direction of the second positioning part is perpendicular to the extending direction of the shell; the second positioning part is detachably and fixedly connected with the bracket.

7. The indoor unit of a cooling device as claimed in claim 5,

the housing further has:

the extending direction of the first supporting plate is perpendicular to the extending direction of the shell; a plurality of first backup pads interval fixed settings are in the dorsal part of first curb plate.

8. The indoor unit of a cooling device as claimed in claim 7,

one end of the first supporting plate extends into a first positioning groove formed by the first end wall and the second end wall in a surrounding mode, and the other end of the first supporting plate is detachably and fixedly connected with the first side plate.

9. The indoor unit of a cooling device as claimed in claim 6,

the housing further has:

a second support plate having an extending direction perpendicular to an extending direction of the case; the plurality of second supporting plates are fixedly arranged on the back side of the second side plate at intervals.

10. The indoor unit of a cooling device as claimed in claim 9,

one end of the second supporting plate extends into a second positioning groove formed by the fourth end wall and the fifth end wall in a surrounding mode, and the other end of the second supporting plate is detachably and fixedly connected with the second side plate.

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