CN108497996B - Dust collector with self-cleaning function and self-cleaning method thereof - Google Patents

Dust collector with self-cleaning function and self-cleaning method thereof Download PDF

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Publication number
CN108497996B
CN108497996B CN201710332285.2A CN201710332285A CN108497996B CN 108497996 B CN108497996 B CN 108497996B CN 201710332285 A CN201710332285 A CN 201710332285A CN 108497996 B CN108497996 B CN 108497996B
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CN
China
Prior art keywords
air
valve
cleaning
self
supplementing
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Active
Application number
CN201710332285.2A
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Chinese (zh)
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CN108497996A (en
Inventor
刘海平
朱锦昌
王峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Cleva Electric Appliance Co Ltd
Original Assignee
Suzhou Cleva Electric Appliance Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzhou Cleva Electric Appliance Co Ltd filed Critical Suzhou Cleva Electric Appliance Co Ltd
Priority to EP18758056.8A priority Critical patent/EP3586710B1/en
Priority to PCT/CN2018/075912 priority patent/WO2018153281A1/en
Publication of CN108497996A publication Critical patent/CN108497996A/en
Application granted granted Critical
Publication of CN108497996B publication Critical patent/CN108497996B/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/36—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back
    • A47L5/365—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back of the vertical type, e.g. tank or bucket type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/0072—Mechanical means for controlling the suction or for effecting pulsating action
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/12—Dry filters
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/20—Means for cleaning filters

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Electric Suction Cleaners (AREA)

Abstract

The invention provides a dust collector with a self-cleaning function, which comprises a machine head assembly, a dust barrel, a hose and a filter, wherein the machine head assembly comprises a fan, an air inlet and an air outlet which are communicated with the outside; in a self-cleaning mode of the dust collector, the suction port is closed, the air supplementing valve controls the air supplementing port to be opened, and air flow sequentially passes through the air supplementing port and the fan and then impacts the cleaning side of the filter; the air supplementing valve is arranged at the air supplementing opening, the pipe wall of the suction opening touches and presses the air supplementing valve to close the suction opening and control the air supplementing valve to open the air supplementing opening, and the hose is separated from the air supplementing valve to open the suction opening and the air supplementing valve to close the air supplementing opening.

Description

Dust collector with self-cleaning function and self-cleaning method thereof
Technical Field
The invention relates to the field of dust collectors, in particular to a dust collector with a self-cleaning function, and also relates to a self-cleaning method of the dust collector.
Background
The vacuum cleaner is widely used for cleaning various places. Generally, a vacuum cleaner typically includes a head assembly, a filter assembly, and a tub assembly. The filter assembly is arranged in a closed space formed by buckling the machine head assembly and the barrel assembly. Generally, the outer edge of the head, the outer edge of the filter assembly and the upper edge of the tub assembly are assembled and pressed in such a manner as to overlap in the axial direction, thereby effectively preventing the leakage of dust.
The ash bucket dust collector is a common household appliance, and in the prior art, the ash bucket dust collector has larger power and large air inflow, so that the burden of a filter is heavier. After long-time work, dust is easy to accumulate in the air duct, the effective dust collection time is influenced, and the dust collection effect is seriously attenuated; at the same time, the service life of the filter is also reduced. In addition, in the use process of the existing dust collector, a user needs to frequently detach the filter to clean and clean, the cleaning workload is large, and poor experience is brought to the user.
Accordingly, there is a need to provide an improved vacuum cleaner that addresses the above-described problems.
Disclosure of Invention
The invention aims to provide a dust collector with a self-cleaning function.
In order to achieve the above object, the present invention provides a vacuum cleaner having a self-cleaning function, comprising a head assembly, a dust barrel, a hose connected to the head assembly or the dust barrel, and a filter connected to the head assembly, wherein the head assembly comprises a blower, an air inlet and an air outlet, the air inlet and the air outlet are communicated with the outside, the hose has a suction port communicated with the outside, the suction port is communicated with the air inlet, the blower is arranged between the filter and the air outlet, an air supply port is arranged between the filter and the blower, the filter has a cleaning side and a non-cleaning side, the vacuum cleaner has a dust collection mode and a self-cleaning mode, and in the dust collection mode, air flows sequentially through the suction port, the air inlet, the filter, the blower and the air outlet; in the self-cleaning mode, airflow sequentially passes through the air supply port and the fan and then impacts the cleaning side of the filter; the dust collection device is characterized in that an air supplementing valve is arranged at the air supplementing opening, the suction opening is opened and controlled by the air supplementing valve to be closed in the dust collection mode, the suction opening is closed and controlled by the air supplementing valve to be opened in the self-cleaning mode, the suction opening can be closed by the air supplementing valve and controlled by the air supplementing valve to be opened by the connector of the suction opening, the suction opening can be closed by the air supplementing valve and the air supplementing valve is controlled to be opened by the air supplementing valve, and the suction opening can be opened by the hose separated from the air supplementing valve and the air supplementing valve to be closed by the air supplementing valve.
As a further development of the invention, the outer surface of the head assembly is provided with a mouthpiece closure, and the air make-up valve is at least partially disposed within the mouthpiece closure.
As a further development of the invention, the mouthpiece closure comprises a bulge, the outer diameter of which is adapted to the inner diameter of the mouthpiece.
As a further development of the invention, the mouthpiece closure further comprises a hose clamp groove, which is arranged around the projection; the pipe wall of the suction port is inserted into the hose clamping groove to touch and press the air supplementing valve.
As a further improvement of the invention, the hose clamping groove is provided with a groove outer wall and a groove inner wall; the distance between the outer wall of the groove and the inner wall of the groove corresponds to the thickness of the pipe wall of the suction port.
As a further development of the invention, the air compensating valve does not protrude from the mouthpiece closure as a whole.
As a further improvement of the invention, the machine head assembly comprises a fan base for supporting the fan and a top cover covered on the fan base, and the air supplementing valve is arranged between the fan base and the top cover.
As a further improvement of the invention, a hose clamping groove is arranged on the top cover, and the hose is inserted into the hose clamping groove to seal the suction port and control the air supplementing valve to open the air supplementing port.
As a further improvement of the invention, the air compensating valve comprises an air compensating valve body and an air compensating valve cover, wherein the air compensating valve body and the air compensating valve cover are arranged on the fan base, the air compensating valve body is provided with an air compensating hole communicated with the air compensating opening, and the air compensating valve cover can move relative to the air compensating valve body to open or close the air compensating hole.
As a further improvement of the invention, the upper part of the air supply hole is provided with the air supply valve cap, the hose clamping groove is internally provided with the air supply hole and a bulge adjacent to the air supply hole, the air supply valve cap part penetrates through the air supply hole and abuts against the air supply valve cap, the hose is inserted into the hose clamping groove, the bulge seals the suction port, and the pipe wall of the suction port contacts and presses the air supply valve cap to drive the air supply valve cap to move relative to the air supply valve body so as to open the air supply hole.
As a further improvement of the invention, the air compensating valve further comprises an elastic element which is pressed against the air compensating valve cover, and the air compensating valve cover can be kept at a position for closing the air compensating hole under the action of the elastic element.
As a further improvement of the invention, the dust collector also has an air supplementing mode, wherein air flows through the air supplementing opening, the fan and the air outlet in sequence.
As a further improvement of the invention, the dust collector is provided with a first air cavity from the air inlet to the non-cleaning side of the filter, a second air cavity from the cleaning side of the filter to the fan, a third air cavity from the fan to the air outlet and a fourth air cavity from the air outlet to the cleaning side of the filter, wherein the fourth air cavity is provided with a self-cleaning air outlet arranged near the air outlet, the suction inlet and the air outlet are opened when the dust collector is in a dust collection mode, the air supply outlet is closed, and external air flows sequentially pass through the suction inlet, the air inlet, the first air cavity, the second air cavity and the third air cavity and are discharged from the air outlet; when the dust collector is in the air supplementing mode, the air outlet and the air supplementing opening are opened, the suction port is closed, and external air flows sequentially pass through the air supplementing opening, the second air cavity and the third air cavity and are discharged from the air outlet; when the dust collector is in a self-cleaning mode, the air supply port is opened, the suction port and the air outlet are closed, and external air flows sequentially pass through the air supply port, the second air cavity, the third air cavity and the fourth air cavity and then enter the second air cavity for circulation after passing through the cleaning side of the filter.
As a further improvement of the present invention, the handpiece assembly further includes a switching valve operable to move between two positions, a first position in which the switching valve opens the air outlet and closes the self-cleaning air outlet, and a second position in which the switching valve closes the air outlet and opens the self-cleaning air outlet.
As a further improvement of the invention, the switching valve comprises an operating handle, a rotating shaft driven by the operating handle and a switching valve cover relatively fixed with the rotating shaft, wherein the handle drives the switching valve cover to alternatively close the air outlet and the self-cleaning air outlet through the rotating shaft.
As a further improvement of the present invention, the head assembly is provided with a plurality of spray holes corresponding to the cleaning side of the filter, and in the self-cleaning mode, the air flow impinges on the cleaning side of the filter through the plurality of spray holes, and the inner diameters of the plurality of spray holes are increased in the direction from inside to outside of the blower.
As a further improvement of the present invention, the head assembly is provided with a plurality of injection holes corresponding to the cleaning side of the filter, and in the self-cleaning mode, the air flow impinges the cleaning side of the filter through the plurality of injection holes; the ratio of the total air outlet area of the injection hole to the air passing area of the fourth air cavity is 1:1.
The invention also provides a self-cleaning method of the dust collector with the self-cleaning function, which comprises the following steps:
s1, connecting the hose with the air supplementing valve;
s2, closing the air outlet;
s3, opening the air outlet;
s4, separating the hose from the air supplementing valve.
As a further improvement of the present invention, in the above steps, the steps S2 and S3 are performed in a plurality of cycles between the steps S1 and S4.
As a further improvement of the present invention, step S3 is maintained for one to three seconds during the cycle of step S2 and step S3, and step S2 is performed again.
The beneficial effects of the invention are as follows: from the above technical solutions, the present invention has a plurality of outstanding substantial technical features, and after implementing the technical solutions of the present invention, the significant technical progress is mainly:
(1) A self-cleaning system is additionally arranged on the traditional dust collector, so that the filter can be self-cleaned;
(2) The effective dust suction time of the dust collector is prolonged;
(3) The self-cleaning effect is excellent, and the service life of the filter is prolonged;
(4) The self-cleaning system reduces the disassembly cleaning frequency of users and reduces the workload;
(5) The design is ingenious, the structure is simple, the production is convenient, and the applicability is strong;
(6) The external cold air entering from the air supplementing air path can cool the fan, so that the temperature of the fan is reduced;
(7) The hose is connected with the air compensating valve, so that the suction port and the air compensating valve can be simultaneously controlled to be opened and closed, the filter is automatically cleaned, the operation is extremely simple and convenient, and better user experience is realized.
Drawings
FIG. 1 is a perspective view of a head assembly of a vacuum cleaner of the present invention;
FIG. 2 is a schematic view of the handpiece assembly of FIG. 1 with the rear cover open;
FIG. 3 is an exploded perspective view of the nose assembly of FIG. 1;
FIG. 4 is a schematic perspective view of the blower base of FIG. 3;
FIG. 5 is a partially exploded schematic illustration of the handpiece assembly and switching valve of FIG. 1;
FIG. 6 is a front view of the handpiece assembly of FIG. 1;
FIG. 7 is a cross-sectional view taken along line A-A of FIG. 6 with the switching valve in a first state;
FIG. 8 is similar to FIG. 7, with the switching valve in a second state;
FIG. 9 is a top view of the stroke cover of FIG. 3;
FIG. 10 is a schematic perspective view in cross-section taken along line B-B in FIG. 9;
FIG. 11 is a top view of the handpiece assembly of FIG. 1;
FIG. 12 is a cross-sectional view taken along line C-C of FIG. 11, with the cleaner in a cleaning mode;
FIG. 13 is similar to FIG. 12, with the cleaner in a self-cleaning mode;
FIG. 14 is a cross-sectional view taken along line D-D of FIG. 11;
FIG. 15 is an enlarged schematic view of portion a of FIG. 14 with the air make-up valve in a closed position;
FIG. 16 is similar to FIG. 15, with the supplemental valve in an open position;
FIG. 17 is a top plan view of the suction closure of the vacuum cleaner of the present invention;
FIG. 18 is a cross-sectional view taken along line E-E of FIG. 11;
FIG. 19 is a schematic view of the hose and air make-up valve of the vacuum cleaner of the present invention disconnected;
FIG. 20 is a schematic view of the hose and air make-up valve connection of the vacuum cleaner of the present invention;
FIG. 21 is a schematic perspective view of the rear cover of FIG. 3 (upper visible);
FIG. 22 is a schematic perspective view (lower visible) of the rear cover of FIG. 3;
figure 23 is a simplified schematic diagram of the cleaner of the present invention in a cleaning mode;
FIG. 24 is a schematic view of the air make-up mode of the vacuum cleaner of the present invention switching from the cleaning mode to the self-cleaning mode;
figure 25 is a simplified schematic illustration of the cleaner of the present invention in a self-cleaning mode.
Detailed Description
The present invention will be described in detail below with reference to embodiments shown in the drawings. However, these embodiments are not intended to limit the present invention, and structural or functional modifications thereof by those skilled in the art are intended to be included within the scope of the present invention.
Referring to fig. 1 to 25, a preferred embodiment of the vacuum cleaner of the present invention is shown. In this embodiment, the cleaner includes a head assembly 10, a dust bucket (not shown), and a filter 30 attached to the head assembly 10. Wherein, the dust bucket can be connected with the machine head assembly 10 in a sealing and buckling way through connecting pieces such as buckling pieces, and in addition, rollers can be arranged below the dust bucket, so that the dust bucket can be conveniently moved. The machine head assembly 10 is also connected with a hose 21, the machine head assembly 10 is provided with an air inlet, one end of the hose 21 is communicated with the air inlet of the machine head assembly 10, the other end of the hose 21 is provided with a suction port 22 communicated with the external environment, external air can be discharged from the suction port 22 after being filtered by a filter 30 through the air inlet, and filtered dust can fall into a dust barrel. Of course, in other embodiments, the hose may be connected to the dust bucket.
The machine head assembly 10 comprises a fan 11, a fan base 12 for supporting the fan 11, a fan cover 14 sleeved on the fan 11 and a top cover 13 covering the upper portion of the fan 11, wherein a filter groove 121 is formed in the fan base 12, the filter groove 121 penetrates through the upper portion and the lower portion of the fan base 12, and the filter 30 is arranged in the filter groove 121. The filter 30 is preferably a flat filter. The top cover 13 is provided with an opening through which the filter 30 can be exposed, the opening being sealed by a rear cover 15 that mates with the top cover 13. The fan housing 14 is provided with an air outlet 141, the air outlet 141 is a total air outlet pipe formed on the fan housing 14, and correspondingly, the fan base 12 is provided with a matching groove 122 for accommodating the total air outlet pipe. The lower part of the fan base 12 is connected with a tray 16, and the tray 16 is used for forming an air channel through which air flows with the fan base 12, the fan cover 14 and the like.
The cleaner has a first air chamber 41 extending from the air inlet to the filter 30, the first air chamber being defined by a dust bucket (not shown) and the fan base 12 and tray 16. A second air chamber 42 is formed extending from the filter 30 to the blower 11, the second air chamber 42 being defined by the blower base 12 and tray 16 and the hood 14. The upstream end of the second air chamber 42 is provided with a first air port 123, and the first air port 123 is provided on the fan base 12 and is located inside the filter tank 121. The fan 11 includes a motor 111 and a motor-driven impeller 112, the air intake of the impeller 112 being in fluid communication with the downstream end of the second air chamber 42. The fan impeller 112 extends to the air outlet 141 to form a third air cavity 43 of the dust collector, and the third air cavity 43 is formed by enclosing the fan base 12 and the fan cover 14. When the cleaner performs a dust suction operation, external air enters from the suction port 22 of the hose 21, passes through the first air chamber 41, the second air chamber 42, and the third air chamber 43 in this order, and is discharged from the air outlet 141. As can be seen from the above, the path from the suction opening 22 of the hose through the first air chamber 41, the filter 30, the second air chamber 42, the blower 11 and the third air chamber 43 to the air outlet 141, i.e. the air flow path forms the dust collection air path of the dust collector. The inside enclosed by the hood 14, the filter 30 and the rear cover 15 is a clean space, the outside is an unclean space, that is, the inside of the filter 30 is a clean side, the outside of the filter 30 is a unclean side, or along the dust collection air path, the downstream side of the filter 30 is a clean side, and the upstream side of the filter 30 is a unclean side.
In addition, a fourth air chamber 44 is formed between the air outlet 141 and the clean side of the filter 30, the fourth air chamber 44 has a second air outlet 142 provided adjacent to the filter and a self-cleaning air outlet 143 provided adjacent to the air outlet 141, the fourth air chamber 44 is surrounded by the air hood 14 and the rear cover 15, and the self-cleaning air outlet 143 extends to the clean side of the filter 30. Specifically, the self-cleaning tuyere 143 is provided on the wall of the main air outlet duct. The fan base 12 is also provided with a ventilation chamber 45, which is disposed adjacent to the filter tank 121. An air supply port 451 is provided at the bottom of the air supply chamber 45, and is in air communication with the first air port 123 on the downstream side of the filter 30. When the air supply opening 451 is opened, the external air may enter the second air chamber 42 from the air supply chamber 45 and then be discharged from the air outlet 141 through the blower 11 and the third air chamber 43, or the external air may enter the second air chamber 42 from the air supply chamber 45 and then enter the fourth air chamber 44 through the blower 11 and the third air chamber 43, pass through the second air chamber 142 and then return to the second air chamber 42 from the clean side of the filter 30, and thus circulate, and the air flow path from the self-cleaning air opening 143 to the clean side of the filter 30 forms the self-cleaning air path of the cleaner.
Referring to fig. 5 to 17, the switching valve 60 is installed on the top cover 13 adjacent to the air outlet 141 and the self-cleaning air outlet 143, and the switching valve 60 may be in two states, a first state, as shown in fig. 7 and 12, closing the self-cleaning air outlet 143 and opening the air outlet 141, and a second state, as shown in fig. 8 and 13, closing the air outlet 141 and opening the self-cleaning air outlet 143. When the switching valve 60 is in the first state, the cleaner has three modes, the first mode is to close the air supply port 451, open the air inlet, and allow the external air to enter the first air chamber 41 from the air inlet, pass through the filter 30, the second air chamber 42, the fan 11 and the third air chamber 43, and then be discharged from the air outlet 141, i.e. the dust collection mode of the cleaner, such that the direction of the solid arrow in fig. 18 is the direction of the airflow in the dust collection mode; in the second mode, the air supply port 451 is opened, the air inlet is closed, external air enters the second air cavity 42 from the air supply port 451, and is discharged from the air outlet 141 after passing through the fan 11 and the third air cavity 43, namely, the air supply mode of the dust collector; when the switching valve 60 is in the second state, the air supply port 451 is opened, the air intake is closed, external air enters the second air chamber 42 from the air supply port 451, passes through the fan 11 and the third air chamber 45, enters the fourth air chamber 44 from the self-cleaning air port 143, passes through the cleaning side of the filter 30, and returns to the second air chamber 42, and the cycle is thus performed, i.e. the self-cleaning mode of the cleaner, and the direction of the dotted arrow in fig. 18 is the direction of airflow in the self-cleaning mode.
Specifically, the switching valve 60 includes a handle 62 for operation and a rotating shaft 63 fixedly connected with the handle 62, the rotating shaft 63 is fixedly connected with the handle 62 through a spline and a screw, a switching valve cover 64 is fixedly arranged on the rotating shaft 63, the switching valve cover 64 is driven by the operating handle 62 through the rotating shaft 63 to rotate around the rotating shaft 63 between two positions, so that the switching valve 60 is in a first state or a second state, the switching valve 60 is in the first state, the switching valve cover 64 seals the self-cleaning air inlet 143 and opens the air outlet 141, the switching valve 60 is in the second state, and the switching valve cover 64 opens the self-cleaning air inlet 143 and seals the air outlet 141. Further, the switching valve 60 further includes an elastic member 61, and the elastic member 61 applies an elastic force to the switching valve cover 64 toward the self-cleaning tuyere 143, that is, the switching valve 60 can be maintained in the first state by the elastic member 61, and the handle 62 of the switching valve 60 is manually operated to be switched to the second state against the action of the elastic member 61. The elastic element 61 is preferably a torsion spring, which can be sleeved on the rotating shaft 63, one end of the torsion spring is fixed relative to the rotating shaft 63, and the other end of the torsion spring 63 is fixed on the top cover 13. Of course, in other embodiments, the switching valve 60 may also be electrically controlled by a steering engine or a steering angle electromagnet to switch between the first state and the second state.
Referring to fig. 15 and 16, in the present embodiment, the air supply port 451 is opened or closed by opening or closing the air supply valve 70. The air compensating valve 70 comprises an air compensating valve body 71, an air compensating hole 75 is formed in the air compensating valve body 71, an air compensating valve cover 72 is arranged at the lower side of the air compensating hole 75, a spring 74 is arranged between the air compensating valve cover 72 and the hollowed air compensating valve bottom wall, and the spring 74 enables the air compensating valve cover 72 to have a trend of upwards closing the air compensating hole 75, that is, the air compensating valve 70 can be kept at the position of closing the air compensating hole 75 under the action of the spring 74. The upper side of the air supplementing hole 75 is provided with an air supplementing valve cap 73, the air supplementing valve cap 73 downwards extends out of the foot, and the foot downwards passes through the air supplementing hole 75 to abut against the air supplementing valve cap 72. The downward movement of the air make-up bonnet 73 can drive the air make-up bonnet 72 together against the force of the spring 74 to open the air make-up vent 75. The air make-up valve 70 is installed between the air make-up chamber 45 and the top cover 13. The top cover 13 is provided with an annular hose clamping groove 132, a through hole 132c is arranged in the hose clamping groove 132, the air supplementing valve cap 73 is positioned above the through hole, and the foot of the air supplementing valve cap 73 downwards penetrates through the through hole. The hose clamping groove 132 is matched with the wall of the suction port 22 (i.e. the free end of the hose 21), when the wall of the suction port 22 is inserted into the hose clamping groove 132, the protrusion 133 arranged in the middle of the hose clamping groove 132 seals the suction port 22, and simultaneously the wall of the suction port 22 presses down the air compensating valve cap 73, so that the air compensating valve 70 is opened, and air between the top cover 13 and the fan base 12 can enter the air compensating cavity 45 through the air compensating hole 75, as the direction of the arrow in fig. 16 is the direction of the air flow when the air compensating hole 75 is opened. Further, the top end of the air compensating valve cap 73 is lower than the top end of the protrusion 132, i.e., the air compensating valve cap 73 is not integrally protruded from the hose clamping groove 132, so that the air compensating valve can be prevented from being erroneously triggered.
As can be seen from the above, in this embodiment, the air supply opening 451 is controlled by the air supply valve 70 to open the air supply opening 451 while closing the suction opening 22 of the hose through the cooperation between the free end of the connector of the hose 21 and the air supply valve 70, where the cooperation means that the air supply valve 70 is pressed by the wall of the suction opening 22 to control the air supply valve 70 to open the air supply opening 451, that is, the wall of the suction opening 22 is pressed against and presses the air supply valve 70; the hose 21 is separated from the air make-up valve 70 so that the suction port 22 can be opened and the air make-up valve 70 closes the air make-up port 451. As shown in fig. 19, the hose 21 is separated from the air make-up valve 70, the suction port 22 is in an open state, and the air make-up valve 70 is in a closed state, i.e., the spring 74 presses the air make-up valve cover 72 to close the air make-up hole 75. As shown in fig. 20, the hose 21 is connected to the air make-up valve 70, and the suction port 22 is in a closed state, i.e., the projection 133 closes the suction port 22; the air make-up valve 70 is in a closed state, the side wall of the hose 21 presses down the air make-up valve cover 72, and the air make-up valve cover 72 drives the air make-up valve cover 72 to move down to open the air make-up hole 75. In this embodiment, as shown in FIG. 17, the hose clamp groove 132 and the projection 133 constitute a mouthpiece closure. The outer diameter of the projection 133 is approximately equal to the inner diameter of the suction port 22, and the annular width of the annular hose clamp groove 132 (the difference between the inner diameter of the outer periphery of the hose clamp groove 132 and the outer diameter of the projection 133, that is, the distance between the groove outer wall 132a and the groove inner wall 132b of the hose clamp groove 132) is approximately equal to the wall thickness of the suction port 22, so that when the hose 21 is inserted into the annular hose clamp groove 132, the wall of the suction port 22 is just inserted into the hose clamp groove 132, and the suction port 22 is just closed by the projection 132. Typically, the wall thickness of the mouthpiece 22 is substantially less than the width of a human finger, which ensures that a user can only close the mouthpiece and control the opening of the air make-up valve by inserting the mouthpiece 22 into the mouthpiece closure and depressing the hose slot 132, but cannot open the air make-up valve 70 by using only his limb (e.g., a finger), ensuring coordinated control of the mouthpiece and the air make-up valve, and preventing the air make-up valve from being triggered by mistake.
Further, in order to improve the efficiency of self-cleaning, an orifice plate 151 is provided in the rear cover 15, and the orifice plate 151 divides the interior of the rear cover 15 into an upper portion and a lower portion, wherein the upper portion is in fluid communication with the self-cleaning tuyere 143. The orifice plate 151 is provided with a plurality of through jet holes 152, and the jet holes 152 form a part of a self-cleaning air path. The jet hole 152 extends downwards to form a jet column, preferably, the aperture of the jet hole 152 of the jet column is not more than 10 mm, specifically, 5 mm-9 mm, the central line of the jet hole 152 is approximately perpendicular to the flat filter, the air outlet direction from the second air port 142 is approximately perpendicular to the central line of the jet hole 152, the air quantity inside the fan assembly is larger than the air quantity outside the fan assembly, and therefore, the aperture of the jet hole close to the inlet of the second air cavity, namely, the first air port, is smaller than the aperture of the jet hole far from the inlet of the second air cavity, or the inner diameter of the jet hole close to the downstream of the dust collection air path is smaller than the inner diameter of the jet hole far from the downstream of the dust collection air path, so that the inner air flow and the outer air flow relative to the second air cavity are more uniform. Preferably, the inner diameter of the plurality of injection holes 152 increases in the direction from inside to outside of the blower 11, and the plurality of injection holes 152 are regularly arranged with respect to the rotation axis of the blower 11. In this embodiment, four rows of injection holes are provided, three injection holes are provided in each row, the inner diameters of the injection holes in the same row are increased from inside to outside, specifically, the aperture of the innermost injection hole is preferably 5 mm, the aperture of the middle injection hole is preferably 7 mm, and the aperture of the outermost injection hole is preferably 9 mm. The lines of the center lines of the injection holes of each row may be disposed parallel to each other or may be disposed in the same radial direction as the rotation axis of the blower 11, and the branches of the injection holes of the same aperture of each row may be disposed in conformity with the arrangement of the filters, such as the arc shape in the present embodiment. In addition, one side of the orifice plate 151 is provided with a sidewall 153 in a grid shape, and the sidewall 153 corresponds to the first air port 123, so that the clean air passing through the filter 30 can enter the first air port 123 from the grid of the sidewall 153. In this embodiment, the gap between the spray post tip and the clean side of the filter 30 is no greater than 20 mm, more preferably 2 mm to 10 mm, and most preferably 5 mm, and the ratio of the total air outlet area of the spray holes to the minimum air passing area of the fourth air chamber 44 is approximately 1:1. The arrangement can simultaneously realize better air flow injection force and impact area to the filter, and achieves the optimal self-cleaning effect.
The invention relates to a self-cleaning method of a dust collector filter, which comprises the following steps:
s1, connecting a hose 21 with a air supplementing valve 70 so that a hose suction opening 22 is closed and an air supplementing opening 451 is opened, enabling air flow to sequentially pass through the air supplementing opening 451, a fan 11 and an air outlet 141, specifically, inserting the free end of the hose 21 into a hose clamping groove 132, sealing the hose suction opening 22 by a protrusion 133 in the clamping groove 132, pressing an air supplementing valve cap 73 downwards by the pipe wall of the hose 21, and opening the air supplementing valve 70, so that the air flow enters a second air cavity 42 and a third air cavity 43 through the air supplementing opening 451 and then is discharged from the air outlet 141;
s2, closing the air outlet 141, specifically, closing the air outlet 141 by opening the switching valve 60 and opening the self-cleaning air outlet 143, wherein external air flows sequentially pass through the air supplementing opening 451, the second air cavity 42, the third air cavity 43 and the fourth air cavity 44, impact the cleaning side of the filter and then enter the second air cavity 42 for circulation;
s3, opening the air outlet 141, specifically, opening the air outlet 141 by closing the switching valve 60 and closing the self-cleaning air outlet 143, so that the air flow enters the second air cavity 42 and the third air cavity 43 through the air supply opening 451 and is discharged from the air outlet 141;
s4, the hose 21 is separated from the air supplementing valve 70, so that the hose suction port 22 is opened and the air supplementing port 451 is closed.
Preferably, step S2 and step S3 are performed in a plurality of cycles between step S1 and step S4, and further, step S2 is performed after step S3 is maintained for a predetermined time during the cycle. Preferably, the predetermined time is 1 to 3 seconds. The cleaner and the operation method thereof according to the present invention will be described in a simplified configuration.
Fig. 23 is a schematic view of the cleaner in the cleaning mode, in which both the suction port 22 and the air outlet 141 are opened, the changeover valve 60 closes the self-cleaning air port 143, and the air supply valve 70 closes the air supply port 451. Under the action of the fan 11, air enters the first air cavity 41 from the suction port 22 and the air inlet, most of impurity dust in the air is intercepted by the filter 30, and most of impurity dust can fall into the unclean air cavity, but some impurity dust can be stuck on the unclean side of the filter 30, clean air passes through the filter 30, sequentially passes through the second air cavity 42 and the third air cavity 43 and finally is discharged from the air outlet 141, and an arrow in the figure schematically indicates the direction of air flow. As the service life of the cleaner is prolonged, excessive dirt and dust may accumulate on the non-cleaning side of the filter, resulting in a decrease in suction force of the cleaner. When the user directly senses a decrease in suction or the cleaner itself senses an excessive accumulation of dirt and dust through the sensor, it is necessary to activate a self-cleaning mode to remove the dirt and dust accumulated on the non-cleaning side of the filter. The starting of the self-cleaning mode can be realized by a user through operating the hose and the switching valve, or can be realized through an automatic mode switching structure arranged in the dust collector, and the specific realization mode is such as a mode of controlling an electromagnetic valve or other control modes known to those skilled in the art, and the details are not repeated here.
Fig. 24 is a schematic view showing a structure of the air supply mode for switching the vacuum cleaner from the cleaning mode to the self-cleaning mode, in which the suction port 22 is closed, the air outlet 141 is opened, the changeover valve 60 closes the self-cleaning air outlet 143, and the air supply valve 70 is opened. Under the action of the blower 11, air enters the second air chamber 42 from the air supply 451, passes through the third air chamber 73, and finally is discharged from the air outlet 141, and the direction of the air flow is schematically indicated by the arrow in the figure. At this time, a low pressure region is formed in the first air chamber 41 and the fourth air chamber 44.
Fig. 25 is a schematic view of the cleaner in the self-cleaning mode, in which both the suction port 22 and the air outlet 141 are closed, the changeover valve 60 opens the self-cleaning air port 143, and the air make-up valve 70 remains open. At this time, the air entering through the air supply opening 451 enters the fourth air chamber 44 through the second air chamber 42 and the third air chamber 43 under the action of the fan 11, and is sprayed out from the spraying hole 152 corresponding to the cleaning side of the filter, and impacts the cleaning side of the filter, so that the accumulated impurity dust stuck on the non-cleaning side of the filter falls off, and a self-cleaning action is completed.
To enhance the self-cleaning effect, the cleaner returns from self-cleaning mode to air-make-up mode, i.e. keeps the air make-up valve 70 open, closes the self-cleaning air outlet 143 and opens the air outlet 141, and then from air-make-up mode to self-cleaning mode, thus cycling the self-cleaning action several times. And finally returning to the dust collection mode from the air supplementing mode or the self-cleaning mode to finish self-cleaning operation. It can be found from the above description that the self-cleaning system is additionally arranged on the traditional dust collector, so that the filter can be self-cleaned; the effective dust suction time of the dust collector is prolonged; the self-cleaning effect is excellent, and the service life of the filter is prolonged; the self-cleaning system reduces the disassembly cleaning frequency of users and reduces the workload; the design is ingenious, the structure is simple, the production is convenient, and the applicability is strong; the external cold air entering from the air supply port 451 can cool the fan, and the temperature of the fan is reduced; in addition, the invention can realize the conversion between the cleaning mode and the dust collection mode by connecting or separating the hose and the air compensating valve, has extremely simple and convenient operation and better user experience.
It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims (17)

1. A vacuum cleaner with self-cleaning function, comprising a head assembly (10), a dust barrel, a hose (21) connected to the head assembly or the dust barrel, and a filter (30) connected to the head assembly, wherein the head assembly comprises a blower (11) and an air inlet and an air outlet (141) which are communicated with the outside, the hose is provided with a suction inlet (22) which is communicated with the outside, the blower is arranged between the filter and the air outlet, an air supplementing opening (451) is arranged between the filter and the blower, the filter is provided with a cleaning side and a non-cleaning side, and the vacuum cleaner is provided with a dust collection mode and a self-cleaning mode, wherein in the dust collection mode, air flows sequentially through the suction inlet, the air inlet, the filter, the blower and the air outlet; in the self-cleaning mode, airflow sequentially passes through the air supply port and the fan and then impacts the cleaning side of the filter; the method is characterized in that: the air supplementing opening is provided with an air supplementing valve (70), in the dust collection mode, the suction opening is opened, the air supplementing valve controls the air supplementing opening to be closed, and in the self-cleaning mode, the suction opening is closed, and the air supplementing valve controls the air supplementing opening to be opened; the pipe wall of the suction port (22) touches and presses the air supplementing valve (70) to close the suction port and control the air supplementing valve to open the air supplementing port, and the hose is separated from the air supplementing valve to open the suction port and the air supplementing valve to close the air supplementing port.
2. A vacuum cleaner as claimed in claim 1, wherein: the outer surface of the nose assembly (10) is provided with a mouthpiece closure, and the air make-up valve (70) is at least partially disposed within the mouthpiece closure.
3. A vacuum cleaner as claimed in claim 2, wherein: the mouthpiece closure comprises a protrusion (133), the outer diameter of the protrusion (133) being adapted to the inner diameter of the mouthpiece (22).
4. A vacuum cleaner according to claim 3, wherein: the mouthpiece closure further comprises a hose clamp groove (132) arranged around the projection (133); the pipe wall of the suction port (22) is inserted into the hose clamping groove (132) to touch and press the air supplementing valve.
5. A vacuum cleaner as claimed in claim 4, wherein: the hose clamping groove (132) is provided with a groove outer wall (132 a) and a groove inner wall (132 b); the distance between the outer wall (132 a) and the inner wall (132 b) corresponds to the thickness of the wall of the suction opening (22).
6. A vacuum cleaner as claimed in claim 2, wherein: the air compensating valve is not protruded out of the suction port sealing piece as a whole.
7. A vacuum cleaner as claimed in claim 4 or claim 5, wherein: the air supplementing valve comprises an air supplementing valve body (71) and an air supplementing valve cover (72) which are arranged on a fan base, wherein an air supplementing hole (75) communicated with the air supplementing opening is formed in the air supplementing valve body, and the air supplementing valve cover can move relative to the air supplementing valve body to open or close the air supplementing hole.
8. A vacuum cleaner as claimed in claim 7, wherein: the upper portion of air make-up hole is equipped with air make-up valve cap (73), be equipped with the through-hole in the hose draw-in groove and with the adjacent arch (133) of through-hole, air make-up valve cap part passes the through-hole and support in the air make-up valve cap, the hose inserts the hose draw-in groove, protruding closure the suction inlet, the pipe wall of suction inlet (22) touches presses air make-up valve cap drive the relative air make-up valve body of air make-up valve cap removes in order to open the air make-up hole.
9. A vacuum cleaner as claimed in claim 7, wherein: the air compensating valve further comprises an elastic element (74) which is propped against the air compensating valve cover, and the air compensating valve cover can be kept at a position for closing the air compensating hole under the action of the elastic element.
10. A vacuum cleaner according to any one of claims 1 to 6, wherein: the dust collector is also provided with an air supplementing mode, and in the air supplementing mode, air flows sequentially pass through the air supplementing port, the fan and the air outlet.
11. A vacuum cleaner as claimed in claim 10, wherein: the vacuum cleaner is provided with a first air cavity (41) from the air inlet to the non-cleaning side of the filter, a second air cavity (42) from the cleaning side of the filter to the fan, a third air cavity (43) from the fan to the air outlet and a fourth air cavity (44) from the air outlet to the cleaning side of the filter, wherein the fourth air cavity is provided with a self-cleaning air outlet (143) adjacent to the air outlet, the suction inlet and the air outlet are opened when the vacuum cleaner is in a dust collection mode, the air supplementing opening is closed, and external air flows sequentially pass through the suction inlet, the air inlet, the first air cavity, the second air cavity and the third air cavity and are discharged from the air outlet; when the dust collector is in the air supplementing mode, the air outlet and the air supplementing opening are opened, the suction port is closed, and external air flows sequentially pass through the air supplementing opening, the second air cavity and the third air cavity and are discharged from the air outlet; when the dust collector is in a self-cleaning mode, the air supply port is opened, the suction port and the air outlet are closed, and external air flows sequentially pass through the air supply port, the second air cavity, the third air cavity and the fourth air cavity and then enter the second air cavity for circulation after passing through the cleaning side of the filter.
12. A vacuum cleaner as claimed in claim 11, wherein: the handpiece assembly also includes a switching valve (60) operable to move between a first position in which the switching valve opens the air outlet and closes the self-cleaning air outlet and a second position in which the switching valve closes the air outlet and opens the self-cleaning air outlet.
13. A vacuum cleaner as claimed in claim 12, wherein: the switching valve comprises an operating handle (62), a rotating shaft (63) driven by the operating handle and a switching valve cover (64) fixed relative to the rotating shaft, wherein the handle drives the switching valve cover to alternatively close the air outlet and the self-cleaning air outlet through the rotating shaft.
14. A vacuum cleaner as claimed in claim 11, wherein: the head assembly is provided with a plurality of spray holes (152) corresponding to the cleaning side of the filter, and in the self-cleaning mode, air flow impacts the cleaning side of the filter through the plurality of spray holes; the ratio of the total air outlet area of the injection holes to the air passing area of the fourth air cavity (44) is 1:1.
15. A self-cleaning method of a vacuum cleaner having a self-cleaning function as claimed in any one of claims 1 to 14, characterized in that: the self-cleaning method comprises the following steps: s1, connecting the hose with the air supplementing valve; s2, closing the air outlet; s3, opening the air outlet; s4, separating the hose from the air supplementing valve.
16. The method of claim 15, wherein in the step S2 and the step S3 are performed in a plurality of cycles between the step S1 and the step S4.
17. The self-cleaning method of a vacuum cleaner as claimed in claim 16, wherein step S3 is maintained for a predetermined time during the cycle of step S2 and step S3, and step S2 is performed again; the predetermined time is 1 to 3 seconds.
CN201710332285.2A 2017-02-27 2017-05-12 Dust collector with self-cleaning function and self-cleaning method thereof Active CN108497996B (en)

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PCT/CN2018/075912 WO2018153281A1 (en) 2017-02-27 2018-02-09 Vacuum cleaner having self-cleaning function and self-cleaning method therefor

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