Air Conditioner

Abstract

The present invention discloses an air conditioner, which includes a chassis, a shell, an external unit component and an internal unit component; the chassis is located outside the area to be temperature-adjusted; the shell is located outside the area to be temperature-adjusted and encloses the chassis to form an inner cavity, the inner cavity is provided with a partition to separate the inner cavity to form a first cavity and a second cavity; the external unit component is built into the first cavity, including a first heat exchanger and a compressor that are interconnected, and the lower ends of the first heat exchanger and the compressor are both connected to the chassis; the internal unit component includes a second heat exchanger, an air inlet and an air outlet, the second heat exchanger is built into the second cavity to separate the second cavity to form a first heat exchange cavity and a second heat exchange cavity that are independent of each other; the air inlet is arranged at the lower part of the shell and is connected to the first heat exchange cavity, the air outlet is arranged above the shell and is connected to the second heat exchange cavity, and the air inlet and the air outlet are both connected to the area to be temperature-adjusted. The technical solution of the present invention can make the structure of the air conditioner simpler to reduce the indoor occupied space.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioner. Background Art

[0002] Nowadays, the use of air conditioners is becoming more and more popular. The common household air conditioners are usually split-type designs, that is, the air conditioner is divided into an indoor air conditioner installed indoors and an outdoor air conditioner installed outdoors. Then, the relevant pipelines of the indoor air conditioner are connected to the outdoor air conditioner after passing through the wall. In this case, the indoor air conditioner is not only complex in structure and cumbersome to disassemble and assemble, but also occupies a large indoor space. Summary of the invention

[0003] The main object of the present invention is to provide an air conditioner, aiming to make the structure of the air conditioner simpler to reduce the indoor occupied space.

[0004] To achieve the above-mentioned purpose, the air conditioner proposed in the present invention includes a chassis, a shell, an outdoor unit component and an indoor unit component; the chassis is located outside the area to be temperature adjusted; the shell is located outside the area to be temperature adjusted, and is enclosed with the chassis to form an inner cavity, and the inner cavity is provided with a partition to isolate the inner cavity to form a first cavity and a second cavity; the outdoor unit component is built into the first cavity, and the outdoor unit component includes a first heat exchanger and a compressor that are interconnected, and the lower ends of the first heat exchanger and the compressor are both connected to the chassis; the indoor unit component includes a second heat exchanger, an air inlet piece and an air outlet piece, and the second heat exchanger is built into the second cavity to isolate the second cavity to form a first heat exchange cavity and a second heat exchange cavity that are independent of each other; the air inlet piece is arranged at the lower part of the shell and is connected to the first heat exchange cavity, and the air outlet piece is arranged above the shell and is connected to the second heat exchange cavity, and the air inlet piece and the air outlet piece are both connected to the area to be temperature adjusted.

[0005] Preferably, the second heat exchanger comprises a refrigerant flow pipe, and the refrigerant flow pipe extends from the second heat exchanger and is connected to the compressor after passing through the partition.

[0006] Preferably, the lower end of the second heat exchanger is connected to the bottom plate to form the first heat exchange chamber and the second heat exchange chamber which are independent of each other and arranged in the left-right direction; or,

[0007] The outer peripheral edge of the second heat exchanger is connected to the shell to form the first heat exchange chamber and the second heat exchange chamber which are arranged in the up-down direction and are independent of each other.

[0008] Preferably, the internal unit assembly further includes a water receiving pan, the second heat exchanger is supported on the water receiving pan, the water receiving pan is placed on the base plate, and is provided with a drainage pipe extending out of the base plate.

[0009] Preferably, the internal unit assembly further comprises a heat preservation member and a side panel, the lower portion of the side panel is provided with an air inlet connected to the air inlet member, and the heat preservation member is arranged between the second heat exchanger and the partition plate;

[0010] A first notch is provided on the top surface of the side panel, and a second notch is provided on the top surface of the heat-insulating component. The first notch and the second notch are combined to form an air duct opening connected to the air outlet component.

[0011] Preferably, the air inlet of the air outlet is communicated with the air duct opening, and the air outlet is smoothly transitioned to the side wall of the air duct opening.

[0012] Preferably, the lower edge of the first notch extends toward the insulation component to form an upper baffle, and the upper baffle abuts against the upper end of the second heat exchanger. The side panel, the upper baffle, the second heat exchanger and the chassis together form the first heat exchange cavity, and the air to be temperature-controlled enters the second heat exchange cavity from the first heat exchange cavity through the second heat exchanger.

[0013] Preferably, the air inlet member is arranged in a cylindrical shape, one end of which is sealedly connected to the air inlet, and the other end of which is connected to the area to be temperature adjusted.

[0014] Preferably, the air outlet member comprises an upper volute, a lower volute, a centrifugal fan wheel and a first motor for driving the centrifugal fan wheel, the upper volute and the lower volute are spliced ​​up and down to form an air duct, and the centrifugal fan wheel and the first motor are built in the air duct;

[0015] The free ends of the upper volute and the lower volute away from the second heat exchanger extend to form an air outlet cylinder, and the air outlet cylinder is connected to the area to be temperature adjusted.

[0016] Preferably, the axial direction of the centrifugal wind wheel is along the up and down direction, the top surface of the centrifugal wind wheel is provided with a clearance recess for accommodating the centrifugal wind wheel, and the bottom surface of the clearance recess is provided with a connecting piece, one end of the first motor is connected to the upper volute, and the other end is connected to the connecting piece.

[0017] In the technical solution of the air conditioner of the present invention, since the chassis and the shell are both located outside the area to be temperature adjusted, that is, the second heat exchanger of the outdoor unit component and the indoor unit component are both located outside the area to be temperature adjusted, and at the same time the air inlet and air outlet of the indoor unit component are connected to the area to be temperature adjusted, when the air conditioner is actually working, the air in the area to be temperature adjusted will enter the first heat exchange chamber from the air inlet, and then enter the second heat exchange chamber after heat exchange with the second heat exchanger. Finally, the air with changed temperature returns to the area to be temperature adjusted through the air outlet connected to the second heat exchange chamber, thereby achieving the purpose of temperature adjustment of the area to be temperature adjusted. Compared with the currently common indoor and outdoor split air conditioners or window units or mobile air conditioners placed indoors, the technical solution of the present invention does not require an air conditioner indoor unit to be installed in the area to be temperature adjusted, but only requires the air inlet and air outlet to be connected to the area to be temperature adjusted. Such an arrangement, on the one hand, can make the structure of the air conditioner as simple as possible and the space occupied in the area to be temperature adjusted as small as possible; on the other hand, since the two fans and the two heat exchangers are installed outside the area to be temperature adjusted, the noise problem caused by the installation of the indoor unit in the area to be temperature adjusted can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 the structures shown in these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of an embodiment of an air conditioner of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the air conditioner from another angle;

[0021] Figure 3 for Figure 1 Exploded view of the air conditioner;

[0022] Figure 4 for Figure 3 An exploded view of the insulation component, the second heat exchanger, the water tray and the side panels;

[0023] Figure 5 for Figure 1 Rear view of the central air conditioner;

[0024] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along the SS direction.

[0025] Description of Figure Numbers:

[0026]

[0027]

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] The present invention provides an air conditioner.

[0033] Reference Figure 1 , Figure 3 as well as Figure 6In one embodiment of the present invention, the air conditioner includes a chassis 1, a shell 2, an outdoor unit component 3 and an indoor unit component. The chassis 1 is located outside the area to be temperature adjusted; the shell 2 is located outside the area to be temperature adjusted, the shell 2 and the chassis 1 are enclosed to form an inner cavity, and the inner cavity is provided with a partition 5 to isolate the inner cavity to form a first cavity and a second cavity; the external unit component 3 is built in the first cavity, and the external unit component 3 includes a first heat exchanger 31 and a compressor 32 that are interconnected, and the lower ends of the first heat exchanger 31 and the compressor 32 are both connected to the chassis 1; the internal unit component includes a second heat exchanger 41, an air inlet piece 42 and an air outlet piece 43, the second heat exchanger 41 is built in the second cavity to isolate the second cavity to form a first heat exchange cavity 211 and a second heat exchange cavity 212 that are independent of each other; the air inlet piece 42 is arranged at the lower part of the shell 2 and is connected to the first heat exchange cavity 211, and the air outlet piece 43 is arranged above the shell 2 and is connected to the second heat exchange cavity 212, and the air inlet piece 42 and the air outlet piece 43 are both connected to the area to be temperature adjusted.

[0034] In this embodiment, the structure of the entire air conditioner is as follows: Figure 1 and Figure 3 As shown. Among them, the shell 2 specifically includes a front panel 22, an upper cover plate 23, a left enclosure 24, a front cover plate 25 and a rear cover plate 26. The internal unit assembly is located on the right side of the external unit assembly 3, that is, the partition 5 stands vertically on the chassis 1, the external unit assembly 3 is located in the first cavity on the left side of the partition 5, and the second heat exchanger 41 is located in the second cavity on the right side of the partition 5. The second heat exchanger 41 includes a refrigerant flow pipe (not marked), which extends from the second heat exchanger 41 and is connected to the compressor 32 after passing through the partition 5. Of course, in other embodiments, the internal unit assembly can also be located on the left side, upper side or lower side of the external unit assembly 3. The external unit assembly 3 also includes an axial flow impeller 33, a second motor 34 for driving the axial flow airflow, and a motor bracket 35 for fixing the second motor 34. At the same time, a mesh cover 221 for safety protection is also installed on the front panel 22. Specifically, the first heat exchanger 31 is arranged in a bent shape with an L-shaped cross section, and is placed on the chassis 1 adjacent to the outer edge of the chassis 1; the lower end of the motor bracket 35 is connected to the chassis 1 and is located on the inner side of the first heat exchanger 31, and the compressor 32 is installed between the motor bracket 35 and the partition 5; one end of the second motor 34 is connected to the motor bracket 35, and the other end is connected to the axial flow fan 33. It should be noted that when the air conditioner is a single cooling air conditioner, the first heat exchanger 31 is the condenser, and the second heat exchanger 41 is the evaporator. In addition, in the actual installation process of the air conditioner, if the indoor space of a room is taken as the area to be temperature-adjusted, the chassis 1, the housing 2, the outdoor unit assembly 3, and most of the indoor unit components of the air conditioner are installed outdoors, and only the free ends of the air inlet 42 and the air outlet 43 of the indoor unit assembly are inserted into the room after passing through the wall.

[0035] In this embodiment, since the chassis 1 and the shell 2 are both located outside the area to be temperature adjusted, that is, the external unit component 3 and the second heat exchanger 41 of the internal unit component are both located outside the area to be temperature adjusted, and at the same time the air inlet piece 42 and the air outlet piece 43 of the internal unit component are connected to the area to be temperature adjusted, when the air conditioner is actually working, the air in the area to be temperature adjusted will enter the first heat exchange chamber 211 from the air inlet piece 42, and then enter the second heat exchange chamber 212 after heat exchange with the second heat exchanger 41. Finally, the air with changed temperature returns to the area to be temperature adjusted through the air outlet piece 43 connected to the second heat exchange chamber 212, thereby achieving the purpose of temperature adjustment of the area to be temperature adjusted. Compared with the currently common indoor and outdoor split air conditioners or window units or mobile air conditioners placed indoors, the technical solution of this embodiment does not require an air conditioner indoor unit to be installed in the area to be temperature adjusted, but only requires the air inlet piece 42 and the air outlet piece 43 to be connected to the area to be temperature adjusted. Such an arrangement can, on the one hand, make the structure of the air conditioner as simple as possible and the space occupied in the area to be temperature adjusted as small as possible; on the other hand, since the two fans and the two heat exchangers are installed outside the area to be temperature adjusted, the noise problem caused by the installation of the indoor unit in the area to be temperature adjusted can be effectively reduced.

[0036] Specifically, Figure 3 and Figure 6 As shown, in this embodiment, the lower end of the second heat exchanger 41 is connected to the chassis 1 to form a first heat exchange chamber 211 and a second heat exchange chamber 212 arranged in the left-right direction and independent of each other. At the same time, the second heat exchanger 41 is preferably arranged in an arc-shaped bending shape to expand the heat exchange area and improve the heat exchange efficiency. However, the present design is not limited to this. In other embodiments, the outer peripheral edge of the second heat exchanger 41 can also be connected to the shell 2 to form a first heat exchange chamber 211 and a second heat exchange chamber 212 arranged in the up-down direction and independent of each other.

[0037] Furthermore, if Figure 3 and Figure 4 As shown, in this embodiment, the indoor unit assembly also includes a water receiving pan 44, on which the second heat exchanger 41 is supported, and the water receiving pan 44 is placed on the chassis 1, that is, the second heat exchanger 41 is indirectly connected to the chassis 1 through the water receiving pan 44, and at the same time, the water receiving pan 44 is also provided with a drain pipe 441 extending out of the chassis 1. In this way, the condensed water generated by the second heat exchanger 41 during operation will drip into the water receiving pan 44, and then be discharged through the drain pipe 441. The water receiving and drainage structure is simpler than the drainage structure of the common air conditioner indoor unit. Furthermore, a support protrusion 442 is provided on the water receiving pan 44 corresponding to the lower end of the second heat exchanger 41, and the second heat exchanger 41 is vertically placed on the support protrusion 442, so as to prevent the accumulated water in the water receiving pan 44 from wetting the lower end of the second heat exchanger 41 and affecting the normal operation of the second heat exchanger 41.

[0038] Reference Figure 1 and Figure 3 In this embodiment, the internal unit assembly further includes a heat preservation member 45 and a side panel 46. The chassis 1, the side panel 46, the partition 5, the front cover 25 and the rear cover 26 form a second cavity; the lower part of the side panel 46 is provided with an air inlet (not shown) connected to the air inlet member 42, and the heat preservation member 45 is provided between the second heat exchanger 41 and the partition 5, mainly used for heat insulation, and is usually made of plastic. Figure 4 , the top surface of the side panel 46 is provided with a first notch 461, the top surface of the heat preservation member 45 is provided with a second notch 453, the first notch 461 and the second notch 453 are combined to form an air duct opening (not marked) connected to the air outlet member 43, so that the temperature-adjusted air in the second heat exchange cavity 212 can enter the air duct of the air outlet member 43 through the air duct opening and then be discharged into the area to be temperature-adjusted. Furthermore, in order to avoid the influence of the air duct shape on the air outlet condition, the air inlet of the air outlet member 43 is connected to the air duct opening, and the side wall of the air outlet member 43 and the air duct opening are smoothly transitioned. Specifically, in this embodiment, the air duct opening and the air inlet of the air outlet member 43 are both circular. It should be noted that, in this embodiment, the heat preservation member 45 is in the shape of a special-shaped plate, and its inner plate surface facing the second heat exchanger 41 is arranged in a gradually expanding half trumpet shape from bottom to top. This arrangement not only expands the volume of the second heat exchange chamber 212 and is conducive to improving the cooling efficiency of the air conditioner, but also enables the air duct opening to be adapted and connected with the air inlet of the air outlet member 43. In addition, a top plate 451 is provided at the top of the heat preservation member 45, and the second notch 453 is provided on the top plate 451, and the front edge and the left edge of the top plate 451 are folded upward to form a flange (not marked), which is respectively connected to the partition plate 5 and the front cover plate 25 to further fix the heat preservation member 45, and at the same time, a through hole 452 is provided at the lower end of the heat preservation member 45 for the refrigerant flow pipe of the second heat exchanger 41 to pass through.

[0039] Furthermore, if Figure 3 and Figure 4As shown, in this embodiment, the lower edge of the first notch 461 extends toward the insulation component 45 to form an upper baffle 462, and the upper baffle 462 abuts against the upper end of the second heat exchanger 41. In this way, the side panel 46, the upper baffle 462, the second heat exchanger 41 and the chassis 1 can be enclosed to form the first heat exchange chamber 211. It can be understood that, under the premise of making the structure of the indoor unit assembly as simple and compact as possible, when the air duct opening is connected to the air inlet of the air outlet piece 43 in the same shape, the top of the second heat exchanger 41 is located in the air duct opening. At this time, if the upper baffle 462 is not set, the first heat exchange chamber 211 can be directly connected to the air duct of the air outlet piece 43, that is, part of the air will not pass through the second heat exchanger 41 but will be directly discharged from the air outlet piece 43, thereby greatly affecting the temperature control effect of the air conditioner. After the upper baffle 462 is set, this phenomenon can be avoided, so that the air entering the first heat exchange chamber 211 must pass through the second heat exchanger 41 before entering the second heat exchange chamber 212, and then be discharged into the area to be temperature controlled through the air outlet piece 43.

[0040] Reference Figure 1 , Figure 2 and Figure 6 In this embodiment, specifically, the air inlet member 42 is preferably arranged in a cylindrical shape, one end of which is sealed and connected to the air inlet to prevent air leakage, and the other end is connected to the temperature-adjusted area, so as to send the air in the temperature-adjusted area to the temperature-adjusted area after heat exchange with the second heat exchanger 41. As for the air outlet member 43, in this embodiment, the air outlet member 43 specifically includes an upper volute 431, a lower volute 432, a centrifugal fan wheel 433 and a first motor 434 for driving the centrifugal fan wheel 433. To facilitate the installation and disassembly of the components, the upper volute 431 and the lower volute 432 are spliced ​​up and down to form an air duct (not marked), and the centrifugal fan wheel 433 and the first motor 434 are built in the air duct. The lower opening of the lower volute 432 is the air inlet of the air outlet 43 connected to the air duct opening, and the free ends of the upper volute 431 and the lower volute 432 away from the second heat exchanger 41 extend toward the temperature-adjusted area to form an air outlet 435, and the air outlet 435 is connected to the temperature-adjusted area. Here, when the centrifugal fan is running, negative pressure can be formed in the air duct, so that air can smoothly enter the second heat exchange chamber 212 from the first heat exchange chamber 211 after heat exchange in the second heat exchanger 41, and flow into the temperature-adjusted area from the air outlet 435.

[0041] Furthermore, if Figure 6As shown, in this embodiment, the axial direction of the centrifugal wind wheel 433 is along the up-down direction. When the centrifugal wind wheel 433 rotates, the air entering the centrifugal wind wheel 433 from the bottom to the top can be changed by the blades of the centrifugal wind wheel 433 to be discharged in the backward direction. Here, in order to further reduce the external volume of the air conditioner, a recessed portion (not marked) for accommodating the centrifugal wind wheel 433 is provided on the top surface of the centrifugal wind wheel 433, and a connecting piece (not marked) is provided on the bottom surface of the recessed portion. One end of the first motor 434 is connected to the upper volute 431, and the other end is connected to the connecting piece. During the specific assembly, the upper end of the first motor 434 is first connected to the upper volute 431, and then the lower end thereof is connected to the centrifugal wind wheel 433. Finally, the upper volute 431 covers the lower volute 432 and is connected thereto by screws or the like.

[0042] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air conditioner, characterized in that: include: A bottom plate, the bottom plate being located outside the area to be temperature adjusted; A shell, the shell is located outside the area to be temperature-controlled, the shell and the bottom plate are enclosed to form an inner cavity, the inner cavity is provided with a partition to separate the inner cavity to form a first cavity and a second cavity; the partition is vertically erected on the bottom plate; an external machine assembly, built in the first cavity, the external machine assembly comprising a first heat exchanger and a compressor that are interconnected, the lower ends of the first heat exchanger and the compressor are both connected to the chassis; and, The indoor unit assembly includes a second heat exchanger, an air inlet member and an air outlet member, wherein the second heat exchanger is built into the second volume cavity to isolate the second volume cavity to form a first heat exchange cavity and a second heat exchange cavity that are independent of each other; the air inlet member is arranged at the lower part of the shell and communicates with the first heat exchange cavity, the air outlet member is arranged at the upper part of the shell and communicates with the second heat exchange cavity, and the air inlet member and the air outlet member are both communicated with the area to be temperature adjusted; the indoor unit assembly also includes a heat preservation member and a side panel, the lower part of the side panel is provided with an air inlet connected to the air inlet member, the heat preservation member The thermal insulation component is arranged between the second heat exchanger and the partition; the top surface of the side panel is provided with a first notch, and the top surface of the thermal insulation component is provided with a second notch, and the first notch and the second notch are combined to form an air duct opening connected to the air outlet component; the air inlet of the air outlet component is connected to the air duct opening, and the air outlet component and the side wall of the air duct opening have a smooth transition; the second heat exchanger is arranged in an arc-shaped bending shape; the thermal insulation component is in the shape of a special-shaped plate, and its inner plate surface facing the second heat exchanger is arranged in a gradually expanding half-trumpet shape in a direction from bottom to top.

2. The air conditioner according to claim 1, characterized in that: The second heat exchanger includes a refrigerant flow pipe, which extends from the second heat exchanger and passes through the partition to be connected to the compressor.

3. The air conditioner according to claim 2, characterized in that: The lower end of the second heat exchanger is connected to the bottom plate to form the first heat exchange chamber and the second heat exchange chamber which are independent of each other and arranged in the left-right direction; or, The outer peripheral edge of the second heat exchanger is connected to the shell to form the first heat exchange chamber and the second heat exchange chamber which are arranged in the up-down direction and are independent of each other.

4. The air conditioner according to claim 3, characterized in that: The internal unit assembly further comprises a water receiving pan, on which the second heat exchanger is supported, and the water receiving pan is placed on the base plate and is provided with a drainage pipe extending out of the base plate.

5. The air conditioner according to claim 1, characterized in that: The lower edge of the first notch extends toward the insulation component to form an upper baffle, and the upper baffle abuts against the upper end of the second heat exchanger. The side panel, the upper baffle, the second heat exchanger and the chassis together form the first heat exchange cavity, and the air to be temperature-controlled enters the second heat exchange cavity from the first heat exchange cavity through the second heat exchanger.

6. The air conditioner according to claim 1, characterized in that: The air inlet member is arranged in a cylindrical shape, one end of which is sealedly connected to the air inlet, and the other end of which is communicated with the area to be temperature adjusted.

7. The air conditioner according to any one of claims 1 to 6, characterized in that: The air outlet member includes an upper volute, a lower volute, a centrifugal wind wheel and a first motor for driving the centrifugal wind wheel, the upper volute and the lower volute are spliced ​​up and down to form an air duct, and the centrifugal wind wheel and the first motor are built in the air duct; The free ends of the upper volute and the lower volute away from the second heat exchanger extend to form an air outlet cylinder, and the air outlet cylinder is connected to the area to be temperature adjusted.

8. The air conditioner according to claim 7, characterized in that: The axial direction of the centrifugal wind wheel is along the up and down direction. The top surface of the centrifugal wind wheel is provided with a recessed portion for accommodating the centrifugal wind wheel. The bottom surface of the recessed portion is provided with a connecting piece. One end of the first motor is connected to the upper volute, and the other end is connected to the connecting piece.

Images