CN115813255A - Vacuum generator and negative pressure dust collection device with same - Google Patents
Vacuum generator and negative pressure dust collection device with same Download PDFInfo
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- CN115813255A CN115813255A CN202210989186.2A CN202210989186A CN115813255A CN 115813255 A CN115813255 A CN 115813255A CN 202210989186 A CN202210989186 A CN 202210989186A CN 115813255 A CN115813255 A CN 115813255A
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- 239000000428 dust Substances 0.000 title description 36
- 230000008602 contraction Effects 0.000 claims abstract description 23
- 238000004891 communication Methods 0.000 claims description 43
- 239000000178 monomer Substances 0.000 claims description 13
- 230000003584 silencer Effects 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 4
- 238000010407 vacuum cleaning Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 description 74
- 230000000694 effects Effects 0.000 description 25
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000007906 compression Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F3/00—Pumps using negative pressure acting directly on the liquid to be pumped
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
- F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
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- Jet Pumps And Other Pumps (AREA)
Abstract
The application provides a vacuum generator including: the generator comprises a generator body, a negative pressure generating cavity and a negative pressure generating cavity, wherein the generator body is provided with an air inlet, a contraction pipe section, an expansion pipe section, the negative pressure generating cavity and an air outlet which are communicated in sequence; wherein, still seted up the negative pressure passageway of breathing in on the generator body, the negative pressure passageway of breathing in includes suction opening section and undergauge runner section, and the chamber takes place for the one end intercommunication negative pressure of undergauge runner section, and the one end of other end intercommunication suction opening section, the other end of suction opening section link up the lateral wall of generator body, and in the direction of inlet air of undergauge runner section, the runner cross-sectional area of undergauge runner section reduces gradually. The application provides a vacuum generator can provide negative pressure suction for vacuum generator through the cooperation that negative pressure takes place the chamber and the negative pressure runner of breathing in.
Description
Technical Field
The embodiment of the application relates to the technical field of negative pressure dust suction devices, in particular to a vacuum generator and a negative pressure dust suction device with the same.
Background
In the prior art, the suction of the negative pressure dust suction equipment is small, and the effective dust removal effect cannot be achieved under the condition of strong dust adhesion.
Disclosure of Invention
In view of the above problems, the present application provides a vacuum generator and a negative pressure dust suction device having the same, and the vacuum generator provided by the present application can provide negative pressure suction force for the vacuum generator through cooperation of a negative pressure generating cavity and a negative pressure suction flow channel.
A first aspect of the present application provides a vacuum generator comprising: the generator body is provided with an air inlet, a contraction pipe section, an expansion pipe section, a negative pressure generating cavity and an air outlet which are communicated in sequence, the pipe diameter of the contraction pipe section is gradually reduced in the ventilation direction from the air inlet to the air outlet, the pipe diameter of the expansion pipe section is gradually increased, and the negative pressure generating cavity is constructed in a way that when gas sprayed out of the expansion pipe section flows through the negative pressure generating cavity, the negative pressure of jet flow in the cavity is generated; wherein, still seted up the negative pressure passageway of breathing in on the generator body, the negative pressure passageway of breathing in includes suction opening section and undergauge runner section, and the chamber takes place for the one end intercommunication negative pressure of undergauge runner section, and the one end of other end intercommunication suction opening section, the other end of suction opening section link up the lateral wall of generator body, and in the direction of inlet air of undergauge runner section, the runner cross-sectional area of undergauge runner section reduces gradually.
Therefore, the vacuum generator provides negative pressure suction for the vacuum generator through the matching of the negative pressure generating cavity and the negative pressure suction flow channel. Specifically, when the negative pressure generating cavity is constructed to be the negative pressure generating cavity, the gas sprayed out of the expansion pipe section flows through the negative pressure generating cavity, the negative pressure of jet flow in the cavity is generated, the purpose of providing negative pressure suction force for the vacuum generator is achieved through the negative pressure of jet flow in the cavity, similarly, after the fluid passes through the diameter-reducing flow channel section of the negative pressure air suction flow channel, the negative pressure of jet flow in the cavity can be generated in the negative pressure generating cavity, the negative pressure generated when air is sucked through the negative pressure air suction flow channel further achieves the purpose of providing negative pressure suction force for the vacuum generator, and the air suction and dust removal capacity is improved.
In some embodiments, the diameter-reducing flow passage section is an annular cavity structure arranged around the side of the negative pressure generation cavity, a first communicating port arranged around the side of the negative pressure generation cavity and communicated with the negative pressure generation cavity is arranged on the inner side surface of the annular cavity structure close to the negative pressure generation cavity, and a second communicating port communicated with the air suction port section is arranged on the outer side surface of the annular cavity structure away from the negative pressure generation cavity. From this, annular cavity structures can take place the chamber through first intercommunication mouth from the week side intercommunication negative pressure in the negative pressure chamber for gaseous suction negative pressure takes place the intracavity.
In some embodiments, the cross-sectional area of the flow passage of the negative pressure generation cavity is gradually reduced from one end of the negative pressure generation cavity communicated with the expansion pipe section to one end of the negative pressure generation cavity communicated with the air outlet. The flow passage cross section area of one end of the negative pressure generation cavity communicated with the expansion pipe section is set to be larger, so that the flow efficiency of fluid in the expansion pipe section flowing to the negative pressure generation cavity can be improved.
In some embodiments, the cavity wall of the negative pressure generating cavity is a curved surface structure having a trumpet-shaped curved surface, and the trumpet-shaped curved surface is a curved surface structure surrounded by motion tracks of the arc-shaped bus when the arc-shaped bus moves around the central axis. The resistance of the curved surface structure to the fluid is small, and the circulation efficiency of the fluid at the curved surface structure can be improved.
In some embodiments, the flared curved wall is convex into the cavity of the negative pressure generating chamber. The bulge of the horn-shaped curved wall in the cavity of the negative pressure generating cavity can drain fluid, so that the fluid can flow to the negative pressure generating cavity under the guiding drainage effect of the horn-shaped curved wall. The trumpet-shaped curved wall provides a wall attachment effect for fluid flowing through the diameter-reducing flow channel section and flowing into the negative pressure generating cavity, and the fluid is guided to flow towards the air outlet direction of the negative pressure generating cavity through the wall attachment effect, so that the flow efficiency of the fluid between the negative pressure air suction flow channel and the negative pressure generating cavity is improved, and the negative pressure effect of the negative pressure generating cavity is improved.
In some embodiments, the reduced diameter flow channel section is an annular cavity structure circumferentially disposed around the negative pressure generating cavity; the inner side surface of the annular cavity structure, which is close to the negative pressure generating cavity, is provided with a first communication port which is arranged around the periphery of the negative pressure generating cavity and communicated with the negative pressure generating cavity, and the first communication port is communicated with the negative pressure generating cavity; and a second communicating port communicated with the air suction port section is formed in the outer side surface of the annular cavity structure deviating from the negative pressure generating cavity. The fluid undergoes a process of compression followed by release in the process of flowing from the second communication port to the first communication port, flowing out of the first communication port, and flowing into the negative pressure generating chamber, whereby the flow rate of the fluid is increased.
In some embodiments, the first communication port is communicated with one end of the negative pressure generation cavity close to the expansion pipe section, so that the reduced diameter flow passage section and one end of the negative pressure generation cavity close to the expansion pipe section are matched to form a passage structure with the flow passage cross-sectional area first reduced and then increased. After the fluid passes through the channel structure which is reduced firstly and then enlarged, the fluid can also generate jet flow, so that the circulation efficiency of the fluid between the diameter-reduced flow channel section and the negative pressure generation cavity is improved.
In some embodiments, the circular arc generatrix has a circular arc radius of R and the first communication port has a width dimension of L in the direction of the central axis of the reduced diameter flow channel section, wherein L/R =0.1. Therefore, on the basis of not influencing the circulation efficiency of the fluid at the first communication port, the flow guiding effect of the arc-shaped bus of the horn-shaped curved surface wall on the fluid is improved, the wall attachment effect is fully utilized, and the air suction performance of the negative pressure air suction flow channel is improved.
In some embodiments, the inner wall of the first communication port is smoothly and transitionally connected with the inner wall of the negative pressure generating cavity. The inner wall through taking place the inner wall in chamber with first opening and negative pressure sets up to slick and sly transitional coupling, can improve smooth and easy nature and the flow efficiency of circulation of fluid between first opening and negative pressure emergence chamber.
In some embodiments, the end of the suction port section penetrating through the side wall of the generator body communicates with one end of the reduced diameter flow passage section to the suction port section, and the flow passage cross-sectional area of the suction port section is gradually reduced. Therefore, the fluid is gradually compressed through the air suction port section and finally diffused in the negative pressure generating cavity, so that the fluid forms higher flow velocity in the compression and diffusion processes, and the flow velocity of the fluid in the air suction port section after flowing into the negative pressure generating cavity is improved.
In some embodiments, the generator body is a spliced body formed by detachably splicing a plurality of single bodies. Through setting up vacuum generator as the concatenation body, can process alone each monomer to this reduces vacuum generator's the manufacturing process degree of difficulty, makes complicated runner and structure in the vacuum generator can accomplish through simple machining.
In some embodiments, the plurality of cells includes a first cell, a second cell, and a third cell detachably connected in sequence; the negative pressure generating cavity and the gas outlet are arranged on the third monomer, and the second monomer and the third monomer are spliced and matched to form a negative pressure gas suction flow channel. The vacuum generator formed by assembling a plurality of monomers can be used for independently processing the contraction pipe section, the expansion pipe section, the negative pressure generation cavity and the negative pressure suction flow channel, so that the difficulty in manufacturing the contraction pipe section, the expansion pipe section, the negative pressure generation cavity and the negative pressure suction flow channel is reduced.
A second aspect of the present application provides a negative pressure dust suction apparatus including: a dust collection pipe; according to the vacuum generator of the first aspect of the present application, the negative pressure suction flow passage of the vacuum generator is configured to perform negative pressure suction, and the air inlet of the vacuum generator is configured to communicate with the air outlet of the air pump. Because the vacuum generator in the embodiment is adopted, the vacuum cleaner can provide larger negative dust suction pressure through the vacuum generator, so that the working efficiency of the vacuum cleaner is improved.
In some embodiments, the vacuum cleaner further comprises an exhaust pipe communicated with the air outlet of the vacuum generator; wherein, a filter and/or a silencer are connected in series on the exhaust pipe. Therefore, impurities such as dust in the exhaust pipe are absorbed by the filter, the phenomenon that the impurities such as the dust in the exhaust pipe flow out of the negative pressure dust suction device to pollute air is reduced, and the noise at the outlet of the exhaust pipe is absorbed by the silencer, so that the noise of the negative pressure dust suction device is reduced.
The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:
FIG. 1 is a schematic structural view of a vacuum generator according to some embodiments of the present application;
FIG. 2 is a schematic diagram of a negative pressure generating chamber of the vacuum generator shown in FIG. 1;
FIG. 3 is a schematic structural view of an extension tube section of the vacuum generator of FIG. 1;
fig. 4 is a schematic structural view of a vacuum cleaner according to some embodiments of the present disclosure.
Some of the figures in the detailed description are numbered as follows:
100 negative pressure dust suction device;
10 of a vacuum generator, 11 of a generator body, 101 of an air inlet, 102 of a contraction pipe section, 103 of an expansion pipe section, 104 of a negative pressure generation cavity, 1041 of a horn-shaped curved wall, 105 of an air outlet, 106 of a negative pressure air suction flow channel, 1061 of an air suction port section, 1062 of a diameter reduction flow channel section, 107 of an annular cavity structure, 1071 of a first communication port, 1072 of a second communication port, 110 of a first single body, 120 of a second single body, 121 of a first notch, 130 of a third single body and 131 of a second notch;
20 air inlet pipes;
30 exhaust pipes;
40 filter, 41 pipe joint;
50 silencer, 51 adapter.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.
In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing the association object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.
In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).
In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "parallel", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the indicated orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.
In the prior art, the suction force of the negative pressure dust suction device is small, and the effective dust removal effect cannot be achieved under the condition of strong dust adhesion. Specifically, the negative pressure dust suction device is provided with a vacuum generator, negative pressure suction force is provided for the negative pressure dust suction device through negative pressure in the vacuum generator, so that dust is sucked into the negative pressure dust suction device, and the negative pressure effect of the vacuum generator directly influences the dust suction effect of the negative pressure dust suction device.
In order to solve the technical problem that the negative pressure cleaning effect is poor due to the small suction force of the negative pressure dust suction device, the negative pressure generating cavity of the vacuum generator and the negative pressure suction flow channel are matched to provide the negative pressure suction force for the vacuum generator, so that the negative pressure suction force of the vacuum generator and the negative pressure dust suction device is improved.
The vacuum generator disclosed in some embodiments of the present application may be used in a vacuum cleaner or other negative pressure equipment, and any negative pressure equipment requiring negative pressure suction falls within the application range of the vacuum generator in some embodiments of the present application.
Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a vacuum generator according to some embodiments of the present application;
FIG. 2 is a schematic diagram of a negative pressure generating chamber of the vacuum generator shown in FIG. 1; fig. 3 is a schematic view of the extension tube section of the vacuum generator shown in fig. 1.
As shown in fig. 1 to 3, a first aspect of the present application provides a vacuum generator 10, the vacuum generator 10 includes a generator body 11, which is provided with an air inlet 101, a contraction pipe section 102, an expansion pipe section 103, a negative pressure generation cavity 104 and an air outlet 105, which are sequentially communicated, in a ventilation direction from the air inlet 101 to the air outlet 105, a pipe diameter of the contraction pipe section 102 is gradually reduced, a pipe diameter of the expansion pipe section 103 is gradually increased, and the negative pressure generation cavity 104 is configured to generate a cavity jet negative pressure when air ejected from the expansion pipe section 103 flows through the negative pressure generation cavity 104; the generator body 11 is further provided with a negative pressure air suction flow channel 106, the negative pressure air suction flow channel 106 comprises an air suction port section 1061 and a reducing flow channel section 1062, one end of the reducing flow channel section 1062 is communicated with the negative pressure generation cavity 104, the other end of the reducing flow channel section 1062 is communicated with one end of the air suction port section 1061, the other end of the air suction port section 1061 penetrates through the side wall of the generator body 11, and in the air inlet direction of the reducing flow channel section 1062, the flow channel cross-sectional area of the reducing flow channel section 1062 is gradually reduced.
In this embodiment, an airflow channel distributed along the length direction of the generator body 11 is formed inside the generator body 11, the air inlet 101 is disposed at an air inlet end of the airflow channel, the air outlet 105 is disposed at an air outlet end of the airflow channel, the contraction pipe section 102, the expansion pipe section 103, and the negative pressure generation cavity 104 are disposed in the middle of the airflow channel, and the negative pressure suction flow channel 106 radially penetrates through a side wall of the generator body 11 along the generator body 11 and communicates the negative pressure generation cavity 104 with the atmosphere.
Some embodiments of the present application provide a vacuum generator 10 that provides negative pressure suction to the vacuum generator 10 through the cooperation of the negative pressure generating chamber 104 and the negative pressure suction flow passage 106. Specifically, the negative pressure generation cavity 104 is configured to generate intra-cavity jet negative pressure when the gas ejected from the extension pipe section 103 flows through the negative pressure generation cavity 104, and the purpose of providing negative pressure suction for the vacuum generator 10 is achieved through the intra-cavity jet negative pressure, and similarly, after the fluid passes through the diameter-reducing flow channel section 1062 of the negative pressure suction flow channel 106, the intra-cavity jet negative pressure can also be generated in the negative pressure generation cavity 104, and the negative pressure generated during suction through the negative pressure suction flow channel 106 further achieves the purpose of providing negative pressure suction for the vacuum generator 10, thereby improving the dust removal capability of suction.
As shown in fig. 1 to 3, in some embodiments, the reduced diameter flow passage section 1062 is an annular cavity structure 107 disposed around the negative pressure generating cavity 104, a first communicating opening 1071 disposed around the negative pressure generating cavity 104 and communicating with the negative pressure generating cavity 104 is disposed on an inner side surface of the annular cavity structure 107 close to the negative pressure generating cavity 104, and a second communicating opening 1072 communicating with the suction opening section 1061 is disposed on an outer side surface of the annular cavity structure 107 away from the negative pressure generating cavity 104.
In the present embodiment, the annular chamber structure 107 is disposed at the radial periphery of the negative pressure generating chamber 104, and the cross-sectional shape of the annular chamber structure 107 may be a cambered surface structure, a triangular structure, a rectangular structure, or an irregular shape, which all belong to the protection scope of some embodiments of the present application.
The annular cavity structure 107 provided by some embodiments of the present application is communicated with the negative pressure generating chamber 104 through the first communication port 1071 from the peripheral side of the negative pressure generating chamber 104, so that the gas is sucked into the negative pressure generating chamber 104, the annular cavity structure 107 further can guide the fluid flowing toward the negative pressure generating chamber 104 through the coanda effect for the fluid flowing through the reduced diameter flow channel section 1062, thereby improving the flow efficiency of the fluid between the negative pressure suction flow channel 106 and the negative pressure generating chamber 104, and improving the negative pressure effect of the negative pressure generating chamber 104.
As shown in fig. 1 to 3, in some embodiments, the cross-sectional area of the flow path of the negative pressure generating chamber 104 gradually decreases from the end of the negative pressure generating chamber 104 communicating with the expanding pipe segment 103 to the end of the negative pressure generating chamber 104 communicating with the air outlet 105.
In this embodiment, the contour of the inner wall of the flow channel of the negative pressure generating chamber 104 may be set to be an oblique line, an arc surface or a stepped surface along the flow direction of the fluid, so as to achieve the purpose of gradually reducing the cross-sectional area of the flow channel of the negative pressure generating chamber 104.
According to the embodiment of the application, the cross-sectional area of the flow channel at one end of the negative pressure generation cavity 104 communicated with the expansion pipe section 103 is set to be larger, so that the flow efficiency of the fluid in the expansion pipe section 103 flowing to the negative pressure generation cavity 104 can be improved.
As shown in fig. 1 to 3, in some embodiments, the cavity wall of the negative pressure generating cavity 104 has a trumpet-shaped curved wall 1041, and the trumpet-shaped curved wall 1041 is a curved structure surrounded by the motion trajectory of the circular-arc bus moving around the central axis.
In this embodiment, the trumpet-shaped curved wall 1041 is disposed at a junction of the negative pressure generating chamber 104, the expansion pipe section 103 and the negative pressure suction flow passage 106, a flare of the trumpet-shaped curved wall 1041 is communicated with the expansion pipe section 103, and a radially outer edge portion of the trumpet-shaped curved wall 1041 is communicated with the negative pressure suction flow passage 106.
Because the negative pressure generating cavity 104 is linearly communicated with the expansion pipe section 103, the negative pressure generating cavity 104 is not needed to drain the expansion pipe section 103, and the flow resistance between the negative pressure generating cavity 104 and the expansion pipe section 103 is only reduced through the flaring of the trumpet-shaped curved wall 1041; since the negative pressure generating chamber 104 is in corner communication with the negative pressure suction flow channel 106, the radial outer edge portion of the trumpet-shaped curved wall 1041 of the negative pressure generating chamber 104 is required to guide and drain the negative pressure suction flow channel 106, so that the fluid in the negative pressure suction flow channel 106 can smoothly flow to the negative pressure generating chamber 104 under the drainage of the radial outer edge portion of the trumpet-shaped curved wall 1041.
The flared curved wall 1041 provided in some embodiments of the present application is disposed at the junction of the negative pressure generating chamber 104, the expanding pipe section 103 and the negative pressure suction flow channel 106, so as to reduce the flow resistance of the fluid flowing from the expanding pipe section 103 to the negative pressure generating chamber 104 and reduce the flow resistance of the fluid flowing from the negative pressure suction flow channel 106 to the negative pressure generating chamber 104, thereby improving the overall flow efficiency of the fluid inside the vacuum generator 10.
As shown in fig. 1-3, in some embodiments, the flared curved wall 1041 protrudes into the cavity of the negative pressure generating chamber.
In this embodiment, since the negative pressure generating chamber 104 is distributed along the length direction of the generator body 11, and the negative pressure suction flow channel 106 is distributed along the radial direction of the generator body 11, the fluid turns during the flowing process between the negative pressure suction flow channel 106 and the negative pressure generating chamber 104, in order to reduce the turning resistance of the fluid, the embodiment of the present application proposes that the trumpet-shaped curved wall 1041 protrudes into the chamber of the negative pressure generating chamber, so as to achieve the purpose of guiding and draining the turning of the fluid, and reduce the flow resistance between the negative pressure suction flow channel 106 and the negative pressure generating chamber 104.
The trumpet-shaped curved wall 1041 provided by some embodiments of the present application protrudes into the cavity of the negative pressure generating cavity to be used for fluid drainage, so that fluid can flow from the negative pressure suction flow channel 106 to the negative pressure generating cavity under the guiding drainage effect of the trumpet-shaped curved wall 1041. Specifically, the trumpet-shaped curved wall 1041 provides a coanda effect for the fluid flowing through the reduced diameter flow channel section 1062 and flowing into the negative pressure generating cavity 104, and guides the fluid to flow in the direction of the outlet of the negative pressure generating cavity 104 through the coanda effect, so as to improve the flow efficiency of the fluid between the negative pressure suction flow channel 106 and the negative pressure generating cavity 104 and improve the negative pressure effect of the negative pressure generating cavity 104.
As shown in fig. 1-3, in some embodiments, the reduced diameter flow channel section 1062 is an annular cavity structure 107 disposed around the periphery of the negative pressure generating cavity 104; wherein, the inner side surface of the annular cavity structure 107 close to the negative pressure generating cavity 104 is provided with a first communicating port 1071 which is arranged around the periphery of the negative pressure generating cavity 104 and communicated with the negative pressure generating cavity 104, and the first communicating port 1071 is communicated with the negative pressure generating cavity 104; and a second communication port 1072 communicated with the air suction port section 1061 is formed on the outer side surface of the annular cavity structure 107 departing from the negative pressure generating cavity 104.
In this embodiment, the diameter-reduced flow passage section 1062 and the trumpet-shaped curved wall 1041 are integrally formed into an arc structure, and the trumpet-shaped curved wall 1041 protrudes into the cavity of the negative pressure generating cavity and extends to the negative pressure suction flow passage 106 to protrude into the cavity of the negative pressure suction flow passage 106.
The integrally formed arc-shaped structure formed by the reduced diameter flow channel section 1062 and the trumpet-shaped curved wall 1041 according to some embodiments of the present application can guide the fluid flowing through the reduced diameter flow channel section 1062 to the negative pressure generating cavity 104 through the coanda effect, so as to improve the flow efficiency of the fluid between the negative pressure suction flow channel 106 and the negative pressure generating cavity 104 and improve the negative pressure effect of the negative pressure generating cavity 104. The fluid undergoes a process of compression before release in the process of flowing from the second communication port 1072 to the first communication port 1071, flowing out of the first communication port 1071, and flowing into the negative pressure generation chamber 104, and the flow rate of the fluid is increased by this process.
As shown in fig. 1-3, in some embodiments, the first communication port 1071 communicates with an end of the negative pressure generating chamber 104 adjacent to the expanded pipe segment 103 such that the reduced diameter flow passage segment 1062 cooperates with an end of the negative pressure generating chamber 104 adjacent to the expanded pipe segment 103 to form a passage structure having a flow passage cross-sectional area that decreases and then increases.
In this embodiment, a port is formed at one end of the negative pressure generation chamber 104 close to the extension pipe section 103, and the first communication port 1071 between the annular chamber structure 107 and the negative pressure generation chamber 104 is formed by forming the annular chamber structure 107 distributed around the periphery of the port at the radial periphery of the port by machining.
Specifically, the annular cavity structure 107 may be configured as a complete annular structure distributed around the periphery of the negative pressure generation cavity 104, or may be configured as a segment of annular structure distributed around the periphery of the negative pressure generation cavity 104, and the segment of annular structure is disposed at a position corresponding to the second communication port 1072, so that the fluid entering through the second communication port 1072 can flow into the negative pressure generation cavity 104 through the segment of annular cavity structure 107.
The embodiments of the present application provide that the fluid can also generate a jet after passing through the channel structure that is reduced and then increased, thereby improving the efficiency of the fluid flowing between the reduced diameter flow channel section 1062 and the negative pressure generating chamber 104.
As shown in fig. 1-3, in some embodiments, the circular arc generatrix has a circular arc radius R and the first communication port 1071 has a width dimension L in the direction of the central axis of the reduced diameter flow passage section 1062, where L/R =0.1.
In the present embodiment, if the size of the first communication port 1071 is too small, the fluid at the first communication port 1071 is blocked from flowing through, and if the size of the first communication port 1071 is too large, the fluid at the first communication port 1071 is not jetted out of the negative pressure generation chamber 104; if the radius R of the arc-shaped bus bar is too small, the relatively abrupt arc-shaped protrusion also blocks the fluid at the first communication port 1071 from flowing through, and if the radius R of the arc-shaped bus bar is too large, the effect that the fluid at the first communication port 1071 forms a wall attachment effect at the arc-shaped bus bar cannot be achieved. Therefore, in the embodiment of the present application, the size relationship between the size of the first communication port 1071 and the arc radius R of the arc-shaped bus bar is proposed by comprehensively considering the size of the first communication port 1071 and the arc radius R of the arc-shaped bus bar, so that the effect of flowing the fluid to the negative pressure generating chamber 104 through the arc-shaped bus bar is improved without affecting the efficiency of flowing the fluid through the first communication port 1071.
Specifically, L/R =0.1 is only a preferred embodiment of the present application, and is not intended to limit the ratio of L to R, which can be flexibly set according to the size of the first communication port 1071, the size of the negative pressure generating chamber 104, the characteristics of the fluid, and the temperature of the fluid, and will not be described herein by way of example.
The embodiment of the application provides on the basis that does not influence the circulation efficiency of fluid in first intercommunication mouth 1071 department, has improved the drainage guide effect of the convex generating line of tubaeform curved wall 1041 to the fluid, and make full use of attaches the wall effect, improves the suction performance of negative pressure suction flow channel 106.
As shown in fig. 1 to 3, in some embodiments, the inner wall of the first communication port 1071 is smoothly and transitionally connected with the inner wall of the negative pressure generating chamber.
In this embodiment, the smooth transition connection between the inner wall of the first communication port 1071 and the inner wall of the negative pressure generation chamber can improve the efficiency of fluid flow between the negative pressure suction flow path 106 and the negative pressure generation chamber, thereby increasing the flow rate of the fluid through the negative pressure suction flow path 106 and the negative pressure generation chamber and increasing the negative pressure effect of the negative pressure generation chamber.
Some embodiments of the present application can improve the smooth and easy nature and the flow efficiency of the circulation of fluid between the first communication port 1071 and the negative pressure generation chamber by setting the inner wall of the first communication port 1071 and the inner wall of the negative pressure generation chamber to smooth transitional connection.
As shown in fig. 1 to 3, in some embodiments, the end of the suction port section 1061 penetrating through the side wall of the generator body 11 communicates with the end of the reduced diameter flow passage section 1062 of the suction port section 1061, and the flow passage cross-sectional area of the suction port section 1061 is gradually reduced.
In this embodiment, the profile of the inner wall of the flow channel of the air suction port 1061 may be set to be an oblique line, an arc surface or a stepped surface along the flow direction of the fluid, so as to achieve the purpose of gradually reducing the cross-sectional area of the flow channel of the air suction port 1061.
In the embodiment of the present application, the fluid is gradually compressed by the suction port 1061 and finally diffused in the negative pressure generating chamber 104, so that the fluid forms a high flow rate in the compression and diffusion processes, thereby increasing the flow rate of the fluid in the suction port 1061 after flowing into the negative pressure generating chamber.
As shown in fig. 1 to 3, in some embodiments, the generator body 11 is a single assembly formed by detachably assembling a plurality of single bodies.
In this embodiment, a plurality of monomers set up to splice in proper order along the length direction of generator body 11 and form, and a plurality of monomers can set up to hollow columnar structure, and a plurality of free inside forms a plurality of passageways or cavity, and after splicing a plurality of monomers in proper order along the length direction of generator body 11 together, a plurality of passageways or cavities of a plurality of monomer insides communicate in proper order, then link together a plurality of monomers through the fastener.
The embodiment of the application can process each monomer independently by setting the vacuum generator 10 as a splicing body, thereby reducing the difficulty of the manufacturing process of the vacuum generator 10 and enabling the complex flow channel and the structure in the vacuum generator 10 to be completed by simple mechanical processing.
In some embodiments, the plurality of single bodies includes a first single body 110, a second single body 120, and a third single body 130 detachably connected in sequence; the air inlet 101 and the contraction pipe section 102 are arranged on the first single body 110, the expansion pipe section 103 is arranged on the second single body 120, the negative pressure generation cavity 104 and the air outlet 105 are arranged on the third single body 130, and the second single body 120 and the third single body 130 are spliced and matched to form the negative pressure air suction flow channel 106.
In this embodiment, the contraction pipe section 102 is configured as a tapered channel extending from the air inlet 101 to the inside and having a gradually decreasing inner diameter, and the expansion pipe section 103 is configured as a tapered channel extending from the air outlet 105 to the inside and having a gradually decreasing inner diameter, that is, the contraction pipe section 102 and the expansion pipe section 103 are both configured as gradually decreasing inner diameters from the outside to the inside, and the contraction pipe section 102 and the expansion pipe section 103 are connected by a narrow channel, and if the first single body 110 and the second single body 120 are configured as an integrated structure, the depth and the precision of the bore hole are both increased, which increases the manufacturing difficulty of the contraction pipe section 102 and the expansion pipe section 103, and therefore, the embodiment of the present application proposes that the first single body 110 and the second single body 120 are configured as a split structure, which decreases the depth and precision of the bore hole, so as to reduce the manufacturing difficulty of the contraction pipe section 102 and the expansion pipe section 103.
Specifically, a first gap 121 is formed at a first end portion of the second single body 120, which is matched with the third single body 130, a second gap 131 is formed at a second end portion of the third single body 130, which is matched with the second single body 120, and a gap between the second gap 131 and the first gap 121 forms a suction port section 1061 of the negative pressure suction flow channel 106. The second gap 131 and the first gap 121 are both provided as fan-shaped gaps, the angle ranges of the second gap 131 and the first gap 121 are determined according to the sizes of the expanded pipe section 103 and the negative pressure generating cavity 104, and specific values are not limited herein.
The embodiment of the application provides a vacuum generator 10 formed by assembling a plurality of single bodies, and the contraction pipe section 102, the expansion pipe section 103, the negative pressure generation cavity 104 and the negative pressure suction flow channel 106 can be independently processed, so that the difficulty of the manufacturing process of the contraction pipe section 102, the expansion pipe section 103, the negative pressure generation cavity 104 and the negative pressure suction flow channel 106 is reduced.
In some embodiments, the inner walls of the contracted pipe section 102, the expanded pipe section 103, the negative pressure generating chamber 104 and the negative pressure suction flow channel 106 are polished to improve the smooth flow of the fluid in the vacuum generator 10, thereby improving the negative pressure suction force of the vacuum generator 10.
The structure can change the speed of the fluid due to the change of the spray section area, so that the fluid is accelerated from subsonic speed to sonic speed until the fluid is accelerated to supersonic speed.
Specifically, the fluid flowing to the vacuum generator 10 through the air inlet 101 can first pass through the contraction pipe section 102 of the laval nozzle structure to be compressed, and then passes through the expansion pipe section 103 of the laval nozzle structure to be expanded, at the position where the gas velocity reaches the maximum, a break is formed in the passageway between the contraction pipe section 102 and the expansion pipe section 103 to be ejected to the expansion pipe section 103, and the fluid ejected to the expansion pipe section 103 drives the fluid in the negative pressure generation cavity 104 to rapidly flow out from the air outlet 105, so that the negative pressure generation cavity 104 forms negative pressure.
As shown in fig. 4, a second aspect of the present application provides a vacuum cleaner 100, the vacuum cleaner 100 includes a vacuum generator 10 according to the first aspect of the present application, and a suction duct 106 of the vacuum generator 10 is configured to perform vacuum cleaning, and an air inlet 101 of the vacuum generator 10 is configured to communicate with an air outlet 105 of an air pump.
In this embodiment, an air inlet pipe 20 is further disposed at the air inlet 101, and the air inlet pipe 20 is further provided with a control valve, so that the on-off and the suction force of the air inlet pipe 20 are controlled by the control valve, thereby improving the adaptability of the vacuum cleaner 100 to various environments.
Some embodiments of the present application provide a vacuum cleaner 100, which uses the vacuum generator 10 of some embodiments of the present application, and thus can provide a larger negative suction pressure through the vacuum generator 10, thereby improving the working efficiency of the vacuum cleaner 100.
In some embodiments, the vacuum cleaner 100 further comprises an exhaust duct 30 in communication with the air outlet 105 of the vacuum generator 10; wherein, a filter 40 and/or a silencer 50 are connected in series to the exhaust pipe 30.
In the present embodiment, the filter 40 may be provided as a strainer filter 40 or a honeycomb filter 40, and the filter 40 is detachably mounted to the exhaust pipe 30 through a pipe joint 41, and the muffler 50 is detachably mounted to the exhaust pipe 30 through an adapter 51 at an outlet of an end of the exhaust pipe 30 for removing noise at the outlet of the exhaust pipe 30.
In the embodiment of the present application, the filter 40 absorbs impurities such as dust in the exhaust pipe 30, so as to reduce the phenomenon that impurities such as dust in the exhaust pipe 30 flow out of the vacuum cleaner 100 to pollute the air, and the silencer 50 absorbs noise at the outlet of the exhaust pipe 30, so as to reduce noise of the vacuum cleaner 100.
The operation of the vacuum cleaner 100 of some embodiments of the present application is described below by way of a specific embodiment:
when the negative pressure dust collector 100 works, fluid flowing to the vacuum generator 10 through the air inlet 101 can be compressed through the contraction pipe section 102 of the laval nozzle structure, and then expanded through the expansion pipe section 103 of the laval nozzle structure, at the position where the air speed reaches the maximum, a gap is formed in a passage between the contraction pipe section 102 and the expansion pipe section 103, and is ejected to the negative pressure generation cavity 104, and the fluid ejected to the negative pressure generation cavity 104 drives the fluid in the negative pressure generation cavity 104 to flow out from the air outlet 105 quickly; the external air enters the negative pressure generating chamber 104 of the vacuum generator 10 from the negative pressure air suction flow channel 106 of the vacuum generator 10, and the fluid in the negative pressure air suction flow channel 106 drives the fluid in the negative pressure generating chamber 104 to be discharged from the air outlet 105.
The negative pressure dust collector 100 is based on the working principle of a Laval nozzle, negative pressure is formed at the air inlet 101, the maximum jet speed of the air outlet 105 can reach 650m/s, the maximum flow guiding speed of the negative pressure air suction flow channel 106 can reach 130m/s, the negative pressure at the air inlet 101 can reach 0.8MPa, the air speed at the air inlet 101 can reach 130m/s, and the negative pressure dust collector is superior to the existing dust collector (the negative pressure air speed of the existing dust collector is less than 25 m/s).
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.
Claims (14)
1. A vacuum generator, comprising:
the generator comprises a generator body, a negative pressure generating cavity and a negative pressure generating cavity, wherein the generator body is provided with an air inlet, a contraction pipe section, an expansion pipe section, the negative pressure generating cavity and an air outlet which are sequentially communicated, the pipe diameter of the contraction pipe section is gradually reduced in the ventilation direction from the air inlet to the air outlet, the pipe diameter of the expansion pipe section is gradually increased, and the negative pressure generating cavity is constructed in a way that when gas sprayed out of the expansion pipe section flows through the negative pressure generating cavity, the negative pressure of jet flow in the cavity is generated;
the generator body is further provided with a negative pressure air suction flow channel, the negative pressure air suction flow channel comprises an air suction port section and a reducing flow channel section, one end of the reducing flow channel section is communicated with the negative pressure generation cavity, the other end of the reducing flow channel section is communicated with one end of the air suction port section, the other end of the air suction port section is communicated with the side wall of the generator body, and the cross section area of the flow channel of the reducing flow channel section is gradually reduced in the air inlet direction of the reducing flow channel section.
2. The vacuum generator according to claim 1, wherein the reduced diameter flow passage section is an annular cavity structure disposed around the negative pressure generating cavity, a first communicating opening disposed around and communicating with the negative pressure generating cavity is disposed on an inner side surface of the annular cavity structure near the negative pressure generating cavity, and a second communicating opening communicating with the air suction opening section is disposed on an outer side surface of the annular cavity structure away from the negative pressure generating cavity.
3. The vacuum generator as claimed in claim 1, wherein the cross-sectional area of the flow path of the negative pressure generating chamber is gradually reduced from the end of the negative pressure generating chamber communicating with the expanding pipe section to the end of the negative pressure generating chamber communicating with the air outlet.
4. The vacuum generator as claimed in claim 3, wherein the negative pressure generating chamber has a flared curved wall, and the flared curved wall is a curved structure surrounded by the motion trajectory of the circular-arc bus moving around the central axis.
5. The vacuum generator as claimed in claim 4, wherein the trumpet shaped curved wall is convex toward the cavity of the negative pressure generating chamber.
6. The vacuum generator as claimed in claim 4 or 5, wherein the reduced diameter flow passage section is an annular cavity structure arranged around the negative pressure generating cavity;
the inner side surface of the annular cavity structure, which is close to the negative pressure generating cavity, is provided with a first communication port which is arranged around the periphery of the negative pressure generating cavity and communicated with the negative pressure generating cavity, and the first communication port is communicated with the negative pressure generating cavity;
and a second communicating port communicated with the air suction port section is formed in the outer side surface of the annular cavity structure deviating from the negative pressure generating cavity.
7. The vacuum generator as claimed in claim 6, wherein the first communication port communicates with an end of the negative pressure generating chamber adjacent to the expanded pipe section, so that the reduced diameter flow passage section and the end of the negative pressure generating chamber adjacent to the expanded pipe section cooperate to form a passage structure having a flow passage cross-sectional area that decreases and then increases.
8. The vacuum generator according to claim 7, wherein the circular arc-shaped generatrix has a circular arc radius of R, and the first communication port has a width dimension of L in a direction of a central axis of the reduced diameter flow passage section, wherein L/R =0.1.
9. The vacuum generator as claimed in claim 7, wherein the inner wall of the first communication port is smoothly transitionally connected with the inner wall of the negative pressure generating chamber.
10. The vacuum generator according to claim 1, wherein the suction port section has an end penetrating the side wall of the generator body and communicating with an end of the reduced diameter flow passage section toward the suction port section, and a flow passage cross-sectional area of the suction port section is gradually reduced.
11. The vacuum generator as claimed in claim 1, wherein the generator body is a built-up body composed of a plurality of single bodies detachably built-up.
12. The vacuum generator as claimed in claim 11, wherein the plurality of single bodies comprises a first single body, a second single body and a third single body detachably connected in sequence;
the negative pressure suction flow channel is formed by splicing and matching the second monomer and the third monomer.
13. A vacuum cleaning apparatus, characterized in that the vacuum cleaning apparatus comprises a vacuum generator according to any one of claims 1 to 12, the negative pressure suction flow passage of the vacuum generator being configured for negative pressure cleaning, the air inlet of the vacuum generator being configured to communicate with an air outlet of an air pump.
14. The vacuum cleaning apparatus of claim 13, further comprising an exhaust conduit in communication with the air outlet of the vacuum generator;
wherein, a filter and/or a silencer are connected in series on the exhaust pipe.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210989186.2A CN115813255B (en) | 2022-08-17 | 2022-08-17 | Vacuum generator and negative pressure dust collection device with same |
| EP23740919.8A EP4350152A4 (en) | 2022-08-17 | 2023-03-15 | Vacuum generator and negative-pressure dust suction device having same |
| PCT/CN2023/081650 WO2024036942A1 (en) | 2022-08-17 | 2023-03-15 | Vacuum generator and negative-pressure dust suction device having same |
| US18/219,151 US20240057833A1 (en) | 2022-08-17 | 2023-07-07 | Vacuum generator and negative pressure dust suction device having same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210989186.2A CN115813255B (en) | 2022-08-17 | 2022-08-17 | Vacuum generator and negative pressure dust collection device with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115813255A true CN115813255A (en) | 2023-03-21 |
| CN115813255B CN115813255B (en) | 2023-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210989186.2A Active CN115813255B (en) | 2022-08-17 | 2022-08-17 | Vacuum generator and negative pressure dust collection device with same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115813255B (en) |
| WO (1) | WO2024036942A1 (en) |
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| CN202348796U (en) * | 2011-08-23 | 2012-07-25 | 捷锐企业(上海)有限公司 | Gas jet-type negative pressure generator and gas jet-type negative pressure adjustor |
| CN102730445A (en) * | 2012-06-29 | 2012-10-17 | 四川长虹电器股份有限公司 | Vacuum sucking device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN115813255B (en) | 2023-12-12 |
| WO2024036942A1 (en) | 2024-02-22 |
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