Movable blowing and sucking integrated dust removal device

Abstract

The invention relates to the technical field of power distribution equipment dust removal, in particular to a movable blowing and sucking integrated dust removal device, a containing assembly comprises a backpack type machine shell, a telescopic corrugated pipe and an insulating blowing and sucking pipe, the telescopic corrugated pipe is arranged on the backpack type machine shell, and the insulating blowing and sucking pipe is arranged on the backpack type machine shell; the operation assembly comprises an installation support, a controller and a dust collector, the installation support is arranged on the backpack type machine shell, the controller is arranged on the installation support, and the dust collector is arranged on the installation support; the blowing and sucking assembly comprises a power motor, a negative pressure chamber, a partition plate and a dust collection chamber, the power motor is arranged on the dust collector, the negative pressure chamber is formed in the dust collector, the partition plate is arranged on the dust collector, and the dust collection chamber is arranged on the dust collector; the switching assembly comprises a turning plate and a turning motor, the turning plate is arranged on the control valve, the turning motor is arranged on the turning plate, the blowing and sucking integrated design is achieved through the interaction among the containing assembly, the operation assembly, the blowing and sucking assembly and the switching assembly, and blowing and sucking operation can be conducted.

Description

Technical Field

[0001] The invention relates to the technical field of dust removal of power distribution equipment, and in particular to a mobile integrated blowing and suction dust removal device. Background Art

[0002] During the operation and maintenance of power distribution equipment, it was found that most distribution transformers, especially special transformers and switches in metal product factories in industrial parks, were covered with a large amount of metal dust or dirt, stains, etc., which was the cause of the transformer flashover. Flashover would cause line fault tripping and sudden power outages at the client. The current treatment method is to clean the equipment by power outage. The power outage cleaning process takes a long time and affects normal life and production electricity demand. Summary of the invention

[0003] In view of the fact that a large amount of metal dust or dust, stains, etc. are attached to the above-mentioned existing equipment, which is the cause of the transformer flashover, the flashover will cause the line to cause a fault trip and a sudden power outage at the client. The current processing method is to clean it by power outage. The power outage cleaning process takes a long time and affects the normal life and production electricity demand. Therefore, the present invention is proposed.

[0004] Therefore, an object of the present invention is to provide a mobile blowing and suction integrated dust removal device.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a mobile blowing and suction integrated dust removal device, comprising:

[0006] A housing assembly, comprising a backpack housing, a telescopic bellows and an insulating blowing and suction pipe, wherein the telescopic bellows is arranged on the backpack housing, and the insulating blowing and suction pipe is arranged on the backpack housing;

[0007] An operating assembly, comprising a mounting bracket, a controller and a vacuum cleaner, wherein the mounting bracket is arranged on the backpack housing, the controller is arranged on the mounting bracket, and the vacuum cleaner is arranged on the mounting bracket;

[0008] A blowing and suction assembly, comprising a power motor, a negative pressure chamber, a partition and a dust collecting chamber, wherein the power motor is arranged on the vacuum cleaner, the negative pressure chamber is opened on the vacuum cleaner, the partition is arranged on the vacuum cleaner, and the dust collecting chamber is arranged on the vacuum cleaner; and,

[0009] The switching component comprises a flap and a flip motor, wherein the flap is arranged on the control valve, and the flip motor is arranged on the flap.

[0010] As a preferred solution of a mobile integrated blowing and suction dust removal device of the present invention, wherein: the accommodating component also includes a wireless remote control, the wireless remote control is an independent device for controlling the start-up of the entire device, the telescopic bellows is fixedly connected to the lower side of the backpack housing, the insulating blowing and suction pipe is fixedly connected to the upper side of the backpack housing, and the telescopic bellows and the insulating blowing and suction pipe are fixedly connected.

[0011] As a preferred solution of the mobile integrated blowing and suction dust removal device of the present invention, the telescopic bellows is flexibly connected to facilitate driving the insulating blowing and suction pipes to swing in multiple directions. When the wireless remote control starting device is working, the insulating blowing and suction pipes can blow out a large amount of air alone or perform suction work alone, thereby realizing simultaneous blowing and suction operations.

[0012] As a preferred solution of the mobile blowing and sucking integrated dust removal device of the present invention, wherein: a battery is also fixedly connected to the mounting bracket, the battery provides a power source for the equipment in the backpack housing, the controller is fixedly connected to the lower side of the battery, and the vacuum cleaner is fixedly connected to the right side of the battery.

[0013] As a preferred solution of the mobile integrated blowing and suction dust removal device of the present invention, a high-speed axial flow fan is fixedly connected to the bottom side of the mounting bracket, a control valve is fixedly connected to the left side of the vacuum cleaner, and a connecting pipe is fixedly connected between the vacuum cleaner and the control valve.

[0014] As a preferred solution of the mobile blowing and sucking integrated dust removal device of the present invention, wherein: the power motor is fixedly connected to the bottom side of the control valve, the power motor is installed on the bottom side of the vacuum cleaner, and the power motor is an inverted structure, so when pouring out the debris and dust in the vacuum cleaner, there is no need to pick up the power motor together, and the overall design is more convenient.

[0015] As a preferred embodiment of a mobile integrated blowing and suction dust removal device of the present invention, the partition forms a negative pressure chamber and a dust collecting chamber in the internal space of the vacuum cleaner, and the power motor establishes negative pressure in the negative pressure chamber by extracting the air in the negative pressure chamber, and the dust collecting chamber is the place where the absorbed debris and dust accumulate and enter.

[0016] As a preferred solution of the mobile blowing and sucking integrated dust removal device of the present invention, wherein: a filter is movably connected to the partition, the upper port of the filter is arranged in the dust collecting chamber, and the bottom position is arranged in the negative pressure chamber. When the vacuum cleaner is working, debris and dust are isolated in the dust collecting chamber by the filter and cannot enter the negative pressure chamber. The air intake of the high-speed axial flow fan is also connected to the negative pressure chamber, and can also assist in generating a larger negative pressure. A dust suction port is opened on the right side of the vacuum cleaner, and a dust suction cover is movably connected to the upper side of the vacuum cleaner. Opening the dust suction cover facilitates the pouring out of debris and dust in the dust collecting chamber.

[0017] As a preferred solution of the mobile integrated blowing and suction dust removal device of the present invention, wherein: the flap is rotatably connected in the control valve, the flip motor is fixedly connected to the bottom side of the control valve, and the driving of the flip motor causes the flap to rotate, a bypass port is opened on the right side of the control valve, and a bypass pipe is fixedly connected to one side of the bypass port.

[0018] As a preferred solution of a mobile integrated blowing and suction dust removal device of the present invention, wherein: a first connecting port and a second connecting port are provided on the front and rear sides of the control valve, the first connecting port and the second connecting port are symmetrically arranged, the first connecting port is connected to the negative pressure chamber, the second connecting port is connected to the connecting pipe, and the flip motor controls the flap to rotate in the control valve, opening the first connecting port and closing the bypass port at the same time.

[0019] The beneficial effects of the present invention are as follows: an integrated blowing and suction design is achieved through the interaction between the accommodating component, the operating component, the blowing and suction component and the switching component, which can perform blowing and dust collection operations, so that the entire device can blow out a large amount of air alone or perform suction work alone, realizing simultaneous blowing and suction operations, improving the dust removal efficiency, adapting to different working environments, and adapting to the needs of different scenes. Due to the use of an efficient filtering system (the filter hole is 1000 mesh) and an optimized airflow design, the device can not only effectively remove pollutants such as metal dust and stains on the transformer, but also reduce energy consumption and achieve the goal of energy saving and environmental protection. In addition, the convenient maintenance method also makes the device more practical and economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of a mobile blowing and suction integrated dust removal device of the present invention.

[0022] Figure 2 The present invention is a schematic diagram of the structure of the operating components of a mobile integrated blowing and suction dust removal device.

[0023] Figure 3 This is a schematic diagram of the structure of a blowing and suction component of a mobile blowing and suction integrated dust removal device of the present invention.

[0024] Figure 4 The present invention is a schematic diagram of the structure of a switching component of a mobile blowing and suction integrated dust removal device.

[0025] Figure 5 The figure is a schematic diagram of the air flow direction of a mobile blowing and suction integrated dust removal device of the present invention. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] Example 1

[0031] Reference Figure 1 - Figure 2, which is the first embodiment of the present invention, provides a mobile integrated blowing and suction dust removal device, which includes a containing component 100, including a backpack shell 101, a telescopic bellows 102 and an insulating blowing and suction pipe 103, the telescopic bellows 102 is arranged on the backpack shell 101, and the insulating blowing and suction pipe 103 is arranged on the backpack shell 101; an operating component 200, including a mounting bracket 201, a controller 203 and a dust collector 204, the mounting bracket 201 is arranged on the backpack shell 101, the controller 203 is arranged on the mounting bracket 201, and the dust collector 204 is arranged on the mounting bracket 201; the interaction between the containing component 100 and the operating component 200 enables the entire device to complete a preliminary structure.

[0032] Specifically, the accommodating assembly 100 further includes a wireless remote controller 104, which is an independent device for controlling the start-up of the entire device. The telescopic bellows 102 is fixedly connected to the lower side of the backpack housing 101, and the insulating blowing and suction pipe 103 is fixedly connected to the upper side of the backpack housing 101, and the telescopic bellows 102 and the insulating blowing and suction pipe 103 are fixedly connected;

[0033] Among them, the insulated blowing and suction pipe 103 is made of insulating material to ensure the safety of the staff while ensuring the strength.

[0034] Furthermore, the telescopic bellows 102 is flexibly connected, so as to facilitate driving the insulating blowing and suction pipe 103 to swing in multiple directions. When the wireless remote controller 104 starts the device, the insulating blowing and suction pipe 103 can blow out a large amount of air or perform suction work alone, thereby achieving simultaneous blowing and suction operations.

[0035] The design of the backpack housing 101 and the telescopic bellows 102 allows the operator to easily move the device to the location that needs to be cleaned, thereby reducing labor intensity.

[0036] Furthermore, a battery 202 is fixedly connected to the mounting bracket 201 , and the battery 202 provides a power source for the equipment in the backpack housing 101 . The controller 203 is fixedly connected to the lower side of the battery 202 , and the vacuum cleaner 204 is fixedly connected to the right side of the battery 202 .

[0037] Furthermore, a high-speed axial flow fan 205 is fixedly connected to the bottom side of the mounting bracket 201 , a control valve 206 is fixedly connected to the left side of the vacuum cleaner 204 , and a connecting pipe 207 is fixedly connected between the vacuum cleaner 204 and the control valve 206 .

[0038] During operation, the controller 203 is connected to the vacuum cleaner 204, the high-speed axial flow fan 205, the control valve 206, and the battery 202 via cables, and the controller 203 is connected to the wireless remote control 104 via the 2.4G wireless mode. The wireless remote control 104 sends a working command to the controller 203. After receiving the command, the controller 203 controls other components to work according to the set mode.

[0039] Example 2

[0040] Reference Figure 1 - Figure 3 , which is the first embodiment of the present invention, provides a mobile integrated blowing and suction dust removal device, which includes a blowing and suction component 300, including a power motor 301, a negative pressure chamber 302, a partition 303 and a dust collecting chamber 304, the power motor 301 is arranged on the vacuum cleaner 204, the negative pressure chamber 302 is opened on the vacuum cleaner 204, the partition 303 is arranged on the vacuum cleaner 204, and the dust collecting chamber 304 is arranged on the vacuum cleaner 204.

[0041] Specifically, the power motor 301 is fixedly connected to the bottom side of the control valve 206, and the power motor 301 is installed on the bottom side of the vacuum cleaner 204. The power motor 301 is an inverted structure, so there is no need to take out the power motor 301 when dumping the debris and dust in the vacuum cleaner 204, which simplifies the cleaning process and improves the convenience of equipment maintenance; the inverted structure makes the power motor 301 located at the bottom, reduces the center of gravity offset of the equipment, enhances stability, and is more stable during operation, thereby improving the overall dust removal efficiency and effect; the power motor 301 is invertedly installed, which reduces the degree to which the motor is affected by vibration, reduces mechanical wear, and extends the service life of the motor, while improving the durability and reliability of the entire device; the inverted design effectively utilizes the internal space of the vacuum cleaner 204, reduces the size and floor space of the equipment, is easy to store and move, and adapts to more complex working environments; the inverted structure of the power motor 301 is combined with a high-efficiency filtration system, which reduces airflow resistance, improves dust collection efficiency, thereby reducing energy consumption, and meets the requirements of energy saving and environmental protection.

[0042] Furthermore, the partition 303 forms a negative pressure chamber 302 and a dust collecting chamber 304 in the internal space of the vacuum cleaner 204. The power motor 301 creates a negative pressure in the negative pressure chamber 302 by extracting the air in the negative pressure chamber 302. The dust collecting chamber 304 is a place where the absorbed debris and dust enter.

[0043] Furthermore, a filter 305 is movably connected to the partition 303, the upper port of the filter 305 is arranged in the dust collecting chamber 304, and the bottom position is arranged in the negative pressure chamber 302. When the vacuum cleaner 204 is working, debris and dust are isolated in the dust collecting chamber 304 by the filter 305 to prevent them from entering the negative pressure chamber 302 or affecting the normal operation of the equipment. The air intake of the high-speed axial flow fan 205 is also connected to the negative pressure chamber 302, which can also assist in generating a greater negative pressure. A dust suction port 306 is opened on the right side of the vacuum cleaner 204, and a dust suction cover 307 is movably connected to the upper side of the vacuum cleaner 204. The opening of the dust suction cover 307 facilitates the dumping of debris and dust in the dust collecting chamber 304.

[0044] The filter hole of the filter 305 is 1000 mesh, and the design of the dust chamber 304 and the filter 305 makes it easy to clean up the debris and dust, and is convenient for maintenance;

[0045] Among them, the design of the high-speed axial flow fan 205 and the power motor 301 makes the device have low energy consumption when working, which is conducive to energy conservation and emission reduction.

[0046] During operation, the power motor 301 is first started. The motor is fixedly connected to the bottom side of the control valve 206 and installed on the bottom side of the dust collector 204. The inverted structure design is adopted. When the power motor 301 is started, it will create a negative pressure environment by extracting the air in the negative pressure chamber 302. This negative pressure environment helps to suck the surrounding air and the carried debris and dust into the dust collecting chamber 304. The air inlet of the high-speed axial flow fan 205 is connected to the negative pressure chamber 302, which can assist in generating a greater negative pressure, thereby improving the dust removal efficiency, which is used to suck in external air and debris; and the dust suction cover 307 on the upper side can be opened to conveniently dump the debris and dust in the dust collecting chamber 304;

[0047] Among them, due to the use of a high-efficiency filtration system (filter hole is 1000 mesh) and optimized airflow design, the device can not only effectively remove pollutants such as metal dust and stains on the transformer, but also reduce energy consumption and achieve the goal of energy saving and environmental protection. In addition, the convenient maintenance method also makes the device more practical and economical.

[0048] Example 3

[0049] Reference Figure 1 - Figure 5 , which is the first embodiment of the present invention, provides a mobile integrated blowing and suction dust removal device, which includes a switching component 400, including a flap 401 and a flip motor 402, the flap 401 is arranged on the control valve 206, and the flip motor 402 is arranged on the flap 401.

[0050] Specifically, the flap 401 is rotatably connected in the control valve 206, the flip motor 402 is fixedly connected to the bottom side of the control valve 206, and the driving of the flip motor 402 causes the flap 401 to rotate. A bypass port 403 is opened on the right side of the control valve 206, and a bypass pipe 404 is fixedly connected to one side of the bypass port 403.

[0051] Furthermore, a first connection port 405 and a second connection port 406 are provided on the front and rear sides of the control valve 206. The first connection port 405 and the second connection port 406 are symmetrically arranged. The first connection port 405 is connected to the negative pressure chamber 302, and the second connection port 406 is connected to the connecting pipe 207. The flip motor 402 controls the flap 401 to rotate in the control valve 206, opens the first connection port 405 and closes the bypass port 403 at the same time.

[0052] During operation, the control valve 206 controls the position of the flap 401 to control the air flow channel, and the controller 203 controls a motor to work alone or synchronously, so as to realize a variety of working modes such as the attached Figure 5 As shown, the design of the flap 401 and the flip motor 402 enables the control valve 206 to achieve multiple working modes, and the insulated blowing and suction pipe 103 can blow out a large amount of air alone or perform suction work alone, realizing blowing and suction operations at the same time, improving the dust removal efficiency, adapting to different working environments, and adapting to the needs of different scenes.

[0053] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values, mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, improvements, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0054] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0055] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, without undue experimentation, the development effort will be a routine task of design, fabrication, and production.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A mobile blowing and suction integrated dust removal device, characterized in that: include, The accommodating assembly (100) comprises a backpack housing (101), a telescopic bellows (102) and an insulating blowing and suction pipe (103), wherein the telescopic bellows (102) is arranged on the backpack housing (101), and the insulating blowing and suction pipe (103) is arranged on the backpack housing (101); An operating assembly (200) comprising a mounting bracket (201), a controller (203) and a vacuum cleaner (204), wherein the mounting bracket (201) is arranged on the backpack housing (101), the controller (203) is arranged on the mounting bracket (201), and the vacuum cleaner (204) is arranged on the mounting bracket (201); A blowing and suction assembly (300), comprising a power motor (301), a negative pressure chamber (302), a partition (303) and a dust collecting chamber (304), wherein the power motor (301) is arranged on the vacuum cleaner (204), the negative pressure chamber (302) is opened on the vacuum cleaner (204), the partition (303) is arranged on the vacuum cleaner (204), and the dust collecting chamber (304) is arranged on the vacuum cleaner (204); as well as, The switching assembly (400) comprises a flap (401) and a flip motor (402), wherein the flap (401) is arranged on the control valve (206), and the flip motor (402) is arranged on the flap (401).

2. The mobile blowing and suction integrated dust removal device according to claim 1 is characterized in that: The accommodating component (100) further comprises a wireless remote controller (104), which is an independent device for controlling the activation of the entire device; the telescopic bellows (102) is fixedly connected to the lower side of the backpack housing (101); the insulating blowing and suction pipe (103) is fixedly connected to the upper side of the backpack housing (101); and the telescopic bellows (102) and the insulating blowing and suction pipe (103) are fixedly connected.

3. The mobile blowing and suction integrated dust removal device according to claim 2 is characterized in that: The telescopic bellows (102) is flexibly connected, so as to facilitate driving the insulating blowing and suction pipe (103) to swing in multiple directions. When the wireless remote controller (104) starts the device to work, the insulating blowing and suction pipe (103) can blow out a large amount of air or perform suction work alone, thereby achieving simultaneous blowing and suction operations.

4. The mobile blowing and suction integrated dust removal device according to claim 3 is characterized in that: The mounting bracket (201) is also fixedly connected to a battery (202), the battery (202) providing a power source for the equipment in the backpack housing (101), the controller (203) is fixedly connected to the lower side of the battery (202), and the vacuum cleaner (204) is fixedly connected to the right side of the battery (202).

5. The mobile blowing and suction integrated dust removal device according to claim 4 is characterized in that: A high-speed axial flow fan (205) is fixedly connected to the bottom side of the mounting bracket (201), a control valve (206) is fixedly connected to the left side of the vacuum cleaner (204), and a connecting pipe (207) is fixedly connected between the vacuum cleaner (204) and the control valve (206).

6. The mobile blowing and suction integrated dust removal device according to claim 5 is characterized in that: The power motor (301) is fixedly connected to the bottom side of the control valve (206), and the power motor (301) is installed on the bottom side of the vacuum cleaner (204). The power motor (301) is an inverted structure, so when dumping the debris and dust in the vacuum cleaner (204), it is not necessary to take the power motor (301) together, and the overall design is more convenient.

7. The mobile blowing and suction integrated dust removal device according to claim 5 or 6, characterized in that: The partition (303) forms a negative pressure chamber (302) and a dust collecting chamber (304) in the internal space of the vacuum cleaner (204); the power motor (301) creates a negative pressure in the negative pressure chamber (302) by extracting air from the negative pressure chamber (302); the dust collecting chamber (304) is a place where sundries and dust collected are accumulated and enter.

8. The mobile blowing and suction integrated dust removal device according to claim 7 is characterized in that: A filter (305) is movably connected to the partition (303); an upper port of the filter (305) is arranged in the dust collecting chamber (304), and a bottom position is arranged in the negative pressure chamber (302); when the vacuum cleaner (204) is working, debris and dust are isolated in the dust collecting chamber (304) by the filter (305) and cannot enter the negative pressure chamber (302); the air intake of the high-speed axial flow fan (205) is also connected to the negative pressure chamber (302), and can also assist in generating a greater negative pressure; a dust suction port (306) is provided on the right side of the vacuum cleaner (204); a dust suction cover (307) is movably connected to the upper side of the vacuum cleaner (204); opening the dust suction cover (307) facilitates the dumping of debris and dust in the dust collecting chamber (304).

9. The mobile blowing and suction integrated dust removal device according to claim 8, characterized in that: The flap (401) is rotatably connected in the control valve (206), the flip motor (402) is fixedly connected to the bottom side of the control valve (206), and the driving of the flip motor (402) causes the flap (401) to rotate. A bypass port (403) is provided on the right side of the control valve (206), and a bypass pipe (404) is fixedly connected to one side of the bypass port (403).

10. The mobile blowing and suction integrated dust removal device according to claim 9, characterized in that: The control valve (206) is provided with a first connection port (405) and a second connection port (406) on the front and rear sides. The first connection port (405) and the second connection port (406) are symmetrically arranged. The first connection port (405) is connected to the negative pressure chamber (302), and the second connection port (406) is connected to the connecting pipe (207). The flip motor (402) controls the flap (401) to rotate in the control valve (206), opens the first connection port (405) and closes the bypass port (403) at the same time.

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