Blowing and sucking integrated dust collection device

Abstract

The invention relates to the technical field of cleaning equipment, in particular to a blowing and sucking integrated dust suction device which comprises an airflow circulation part and a dust separation execution part, the airflow circulation part comprises at least two stages of venturi tubes which are sequentially connected in series and communicated, and the venturi tubes are covered with collecting covers; a collecting cavity is formed in the collecting cover, a collecting opening and a backflow opening which are communicated with the collecting cavity are formed in the collecting cover, a backflow pipeline is connected between the backflow opening and the Venturi tube located above the backflow opening, negative pressure is formed around after airflow is sprayed out from the spraying opening at a high speed, and negative pressure suction carries dust-containing gas to enter the collecting cavity from the collecting opening. Then the air flow sequentially passes through the backflow opening and the backflow pipe to re-enter the acceleration channel; a traditional'single-stage acceleration-separation 'open-loop mode is broken through, a'kinetic energy recovery-secondary acceleration-enhanced separation' closed-loop system is constructed through countercurrent coupling of the Venturi tube and the cyclone separator, the closed-loop system completely isolates dusty gas from leaking out, and dual improvement of the energy utilization rate and the dust removal efficiency is achieved.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment technology, and in particular to a blower-vacuum integrated dust collection device. Background Technology

[0002] In the field of cleaning equipment technology, current vacuum cleaners on the market face technical bottlenecks. First, the single-stage nozzle lacks sufficient acceleration kinetic energy, making it difficult to overcome the binding force between adhering dust and the surface, resulting in incomplete cleaning. Second, the open airflow circulation design means that the kinetic energy of the clean gas is not recovered and utilized, leading to serious energy waste and high energy consumption due to continuous fan operation. Furthermore, the dust blowing device and separation unit are independently laid out, resulting in a lack of pretreatment of the dust-laden airflow, a high risk of pipe blockage, and low cyclone separation efficiency. Existing technologies have not resolved the contradictions between kinetic energy, energy consumption, and synergy, and technological innovation is urgently needed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: in order to overcome the problem that the single-stage nozzle in the prior art has insufficient acceleration kinetic energy, which makes it difficult to overcome the binding force between the adhering dust and the surface, resulting in incomplete cleaning; in addition, the open airflow circulation design makes it impossible to recover and utilize the kinetic energy of the clean gas, resulting in serious energy waste and high energy consumption of the fan during continuous operation. The present invention provides a blower-suction integrated dust collection device.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a blow-and-suction integrated dust collection device, comprising: The airflow circulation section includes at least two venturi tubes connected in series. An acceleration channel is formed inside the at least two venturi tubes. The primary venturi tube has an air inlet connected to an external air source, and the final venturi tube has a jet nozzle that blows towards the surface to be cleaned. A collection hood is provided on the outside of the venturi tubes. A collection chamber is formed inside the collection hood, and a collection port and a return port are connected to the collection chamber. A return pipe is connected between the return port and the venturi tube located above it. After the airflow is ejected at high speed from the jet nozzle, a negative pressure is formed around it. The negative pressure suction force carries the dust-laden gas from the collection port into the collection chamber. Then the airflow re-enters the acceleration channel through the return port and the return pipe. The dust separation execution section is located on the return pipeline and is used to separate the airflow from the dust and collect the dust.

[0005] Furthermore, the dust separation execution part includes a cyclone separator.

[0006] Furthermore, two adjacent Venturi tubes can be close to or far from each other.

[0007] Furthermore, a bellows is connected between two adjacent venturi tubes and a telescopic mechanism is installed to drive them closer or further apart.

[0008] Furthermore, the collection cover has an arc-shaped structure.

[0009] Furthermore, the collection hood extends downward to form a baffle, which protrudes downward from the spray nozzle.

[0010] Furthermore, a flow regulating valve is provided on the return pipeline.

[0011] Furthermore, the cyclone separator has a horizontal structure.

[0012] The beneficial effects of this invention are: 1. This invention utilizes a series of venturi tubes to achieve multi-stage acceleration, significantly increasing the airflow speed and creating a high-speed jet with strong dust impact force, which can cause highly adhesive particles to detach from the ground.

[0013] 2. This invention achieves gas purification and return to the nozzle through centrifugal separation using a cyclone separator, and the separated particles are also effectively recovered. The closed-loop design reduces energy consumption. The residual pressure of the return gas assists in acceleration, reducing compressed air consumption and dependence on external gas sources. At the same time, wear-resistant materials are used to extend the equipment's lifespan.

[0014] 3. This invention breaks through the traditional open-loop mode of "single-stage acceleration-separation". By using the counter-current coupling of the Venturi tube and the cyclone separator, a closed-loop system of "kinetic energy recovery-secondary acceleration-enhanced separation" is constructed. The closed-loop system completely isolates the leakage of dust-laden gas, achieving a dual improvement in energy utilization and dust removal efficiency. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a three-dimensional schematic diagram of the airflow circulation section in this invention; Figure 3 This is a cross-sectional view of the Chinese-language tube of the present invention.

[0017] In the picture: 1. Airflow circulation section; 101. Venturi tube; 1011. Acceleration channel; 1012. Air inlet; 1013. Injector; 102. Collection hood; 1021. Collection chamber; 1022. Collection port; 1023. Return port; 1024. Side flange; 103. Return pipeline; 104. Bellows; 1041. Fixed section; 1042. Flange; 105. Telescopic mechanism; 106. Flow regulating valve; 107. Sleeve; 2. Cyclone separator. Detailed Implementation

[0018] The invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner. Therefore, they only show the components relevant to the invention, and directions and references, such as up, down, left, right, etc., are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents. Example

[0019] like Figures 1-3 As shown, the present invention is a blower-vacuum integrated dust collection device, including an airflow circulation section 1 and a dust separation execution section: The airflow circulation section 1 includes at least two venturi tubes 101 connected in series. The at least two venturi tubes 101 are coaxially arranged to ensure consistent airflow direction. An acceleration channel 1011 is formed inside each venturi tube. The primary venturi tube 101 has an inlet 1012 connected to an external air source, and the final venturi tube 101 has a nozzle 1013 that blows towards the surface to be cleaned. The outlet of the constriction section of the first venturi tube 101 is precisely connected to the inlet of the constriction section of the second venturi tube 101, forming a stepped acceleration channel 1011. The first stage uses its throat for initial acceleration, and the second stage uses a series constriction structure to multiply the flow velocity, ultimately outputting a high-energy, high-impact mixed airflow, breaking through the performance limitations of a single-stage venturi tube and ultimately projecting it at an ultra-high flow rate towards the dust-adhered ground. The Venturi tube 101 is covered by a collection cover 102. The collection cover 102 has a collection cavity 1021 inside and has a collection port 1022 and a return port 1023 communicating with the collection cavity 1021. The return port 1023 is connected to the Venturi tube 101 above it by a return pipe 103. The Venturi tube 101 is covered by a sleeve 107. The end of the return pipe 103 passes through the sleeve 107 and communicates with the Venturi tube 101. After the airflow is ejected at high speed from the injection port 1013, a negative pressure is formed around it. The negative pressure suction forces the dust-laden gas into the collection cavity 1021 from the collection port 1022. Then the airflow passes through the return port 1023 and the return pipe 103 in sequence and re-enters the acceleration channel 1011. Preferably, the return pipe 103 is provided with guide vanes to enhance the airflow swirling effect.

[0020] The dust separation execution section is located on the return pipe 103 and is used to separate the airflow from the dust and collect the dust. The mixing inlet of the dust separation execution section is tangentially connected to the tangential return port 1023 on the collection hood 102 through part of the return pipe 103. The airflow outlet is connected to the Venturi tube 101 through part of the return pipe 103. The clean gas separated by the dust separation execution section contains residual kinetic energy and is reintroduced into the nozzle channel, forming a closed-loop airflow circulation. During operation, the gas purified by the dust separation execution section is reinjected into the system, avoiding the energy loss of continuously replenishing external gas required in traditional dust collection equipment and effectively reducing operating costs.

[0021] The workflow of this embodiment is divided into two parts: airflow circulation and dust treatment. In the initial stage, an external air source provides initial airflow to the air inlet 1012 of the venturi tube 101. After being accelerated by the pre-stage and post-stage nozzles, the airflow is ejected from the nozzle 1013, blowing up the dust on the ground. Then, the dust-laden airflow enters the collection chamber 1021 under negative pressure and enters the dust separation execution section in a swirling state through the tangential pipe. The dust is separated under the action of centrifugal force and collected at the bottom discharge port. The clean gas flows back into the acceleration channel 1011 through the clean gas outlet, completing the closed-loop circulation. The closed-loop design directly utilizes the pressure energy of the separated gas to drive the venturi tube 101, reducing the power consumption of the external fan, significantly reducing the unit energy consumption, and greatly improving the energy utilization rate compared with traditional devices.

[0022] In this embodiment, when the high-speed jet impacts the surface, the dust particles overcome surface tension and gravity and enter the airflow field. The negative pressure zone formed by the jet and the negative pressure gradient within the collection hood 102 force the dust-laden airflow to form a pre-swirling flow before entering the dust separation execution section, which can improve the separation efficiency. Furthermore, the high-speed airflow entrainment effect and the system's negative pressure drive give the dust-laden gas a velocity. This velocity causes the dust particles to move with the airflow, resulting in the dust-laden gas entering the dust separation execution section at a certain speed along the tangential direction. In the centrifugal force field, gas-solid separation is achieved, ultimately achieving the dust removal effect.

[0023] In some examples, the dust separation execution unit includes a cyclone separator 2, which improves particle recovery rate, has high smoothness and stability, and has a low probability of pipe blockage.

[0024] In some examples, adjacent Venturi tubes 101 can be positioned closer to or further apart. When the distance between the two Venturi tubes 101 decreases, the high-speed jet ejected from the preceding Venturi tube 101 can more directly impact the inlet of the subsequent stage, reducing energy loss and increasing the final jet velocity. Simultaneously, the jet's ability to entrain surrounding media is enhanced, resulting in a significantly increased negative pressure. Conversely, when the distance increases, the jet diffuses more fully between stages, mixing more uniformly with the surrounding media. Although the final jet velocity decreases, the negative pressure distribution is more stable. By dynamically adjusting this distance, the jet velocity and negative pressure can be optimized according to the characteristics of the separated media, thereby achieving precise control of the separator's separation efficiency.

[0025] In some examples, a bellows 104 is connected between two adjacent Venturi tubes 101 and a telescopic mechanism 105 is installed to drive the two tubes to move closer or further apart. The bellows 104 has fixed sections 1041 at both ends that are fixed to the adjacent Venturi tubes 101 respectively. Each fixed section 1041 is equipped with a flange 1042 for fixing to the Venturi tube 101. The flexible structure of the bellows 104 can not only compensate for axial displacement, but also maintain airtightness. To ensure the airtightness of the dual-protection device, auxiliary sealing rings can also be used, such as adding high-temperature silicone O-rings or polytetrafluoroethylene lip seals at the flange 1042 interfaces at both ends of the bellows 104.

[0026] The telescopic mechanism 105 can be, but is not limited to, a telescopic rod or a screw and nut structure. In this embodiment, it is a screw and nut structure, including a motor base fixed on one of the flanges 1042, a motor mounted on the motor base, a screw connected to the output end of the motor, and a nut seat mounted on the screw. The nut seat is connected to the other flange 1042. When the motor drives the screw to rotate, the nut seat drives the secondary venturi tube 101 to move along the axis, and the bellows 104 extends and retracts accordingly. In some examples, the collection hood 102 has an arc-shaped structure, which can reduce airflow separation and turbulence loss through continuous curved walls, resulting in a smaller drag coefficient. At the same time, the outward-expanding arc forms a uniform negative pressure field, which enhances the ability to entrain dust from a distance and reduces impact rebound deposition.

[0027] In some examples, the collection hood 102 extends downward to form a baffle 1024, which protrudes downward from the nozzle 1013 to prevent dust particles blown up by the high-speed jet from escaping to the surroundings. At the same time, the high-speed airflow ejected from the venturi tube 101 creates a local negative pressure in the baffle 1024, which guides any dust particles that may escape back into the collection hood 102.

[0028] In some examples, the return line 103 is equipped with a flow regulating valve 106, which automatically adjusts the gas flow rate according to the pressure difference between the inlet and outlet of the cyclone separator 2.

[0029] In some examples, the cyclone separator 2 is a horizontal structure. The dust-laden gas enters the cyclone separator 2 tangentially from the mixing inlet and rotates at high speed inside the cylinder. The gas flow path is straight, with low local resistance, which can improve the settling velocity of solid particles and avoid dead spots. Due to centrifugal force, heavier dust particles are thrown against the cylinder wall, slide down the wall, and are discharged from the bottom discharge port. The gas separated by the horizontal separator flows back to the venturi tube 101 through the return pipe 103. This is partly due to the negative pressure suction generated at the throat of the primary venturi tube 101, and partly due to the fact that the separated gas itself has a certain velocity.

[0030] Working principle: During the vacuuming process, the high-speed jet, accelerated through multiple stages, generates a powerful impact force, instantly blowing up dust particles adhering to the surface to be cleaned (such as the floor). When the high-speed jet is ejected from the nozzle 1013, the pressure around the nozzle decreases significantly, causing the fluid to flow towards the higher pressure area above. The upper area is equipped with a collection hood 102 to ensure that the dust-laden airflow is stabilized within a certain space. At the same time, the openings on the side wall of the collection hood 102 are tangentially connected to the mixing inlet of the cyclone separator 2. This layout allows the dust-laden airflow to generate high-speed centrifugal force when entering the cyclone separator 2. Larger dust particles are separated to the wall of the separator and settled under centrifugal force, while the purified gas returns to the acceleration channel 1011 of the venturi tube 101 through the top outlet, completing a closed-loop airflow circulation.

[0031] After the gas enters through the Venturi nozzle inlet, its cross-section continuously decreases as the pipe contracts along the converging section. According to Bernoulli's principle, fluid kinetic energy and pressure energy are mutually converted. In the throat region, where the cross-sectional area is smallest, the gas velocity reaches its peak, while the pressure drops to its lowest, creating a negative pressure environment significantly lower than the external atmospheric pressure. This negative pressure generates a suction effect through the return pipe 103, driving the gas separated by the cyclone separator 2 into the device, where it merges with the primary accelerated main airflow behind the throat and flows downstream together. Subsequently, the mixed airflow flows through the next converging section, further accelerating to form a high-speed jet. This jet has high kinetic energy characteristics. When it impacts the ground, on the one hand, momentum transfer gives dust particles an initial upward velocity; on the other hand, due to the high velocity and low pressure around the jet, the negative pressure suction forces the surrounding dust-laden gas to move upward synchronously. Under the combined effect of these two factors, the dust-laden gas is efficiently collected in the collection hood 102.

[0032] Simultaneously, the continuous negative pressure suction at the throat reduces the gas inside the cyclone separator 2, gradually lowering its pressure below that inside the collection hood 102, thus creating a negative pressure gradient. The collection hood 102 is connected to the mixing inlet of the cyclone separator 2 through a tangential opening. The dust-laden gas enters the cyclone separator 2 in a tangential swirling manner, achieving gas-solid separation in the centrifugal force field, ultimately achieving the dust removal effect.

[0033] The above description, based on the preferred embodiments of the present invention, provides inspiration. Those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification but must be determined according to the claims.

Claims

1. A blower-vacuum integrated dust collection device, characterized in that: include: The airflow circulation section (1) includes at least two venturi tubes (101) connected in series. Each of the at least two venturi tubes (101) has an acceleration channel (1011) inside. The primary venturi tube (101) has an air inlet (1012) connected to an external air source, and the final venturi tube (101) has a jet nozzle (1013) that blows towards the surface to be cleaned. A collection shroud (102) is provided outside the venturi tubes (101), and a collection chamber (1021) is formed inside the collection shroud (102). It has a collection port (1022) and a return port (1023) communicating with the collection chamber (1021). The return port (1023) is connected to the venturi tube (101) above it by a return pipe (103). After the airflow is ejected at high speed from the jet port (1013), a negative pressure is formed around it. The negative pressure suction force carries the dust-laden gas from the collection port (1022) into the collection chamber (1021). Then the airflow passes through the return port (1023) and the return pipe (103) in sequence and re-enters the acceleration channel (1011). The dust separation execution section is located on the return pipe (103) and is used to separate the airflow from the dust and collect the dust.

2. The blow-suction integrated dust collection device according to claim 1, characterized in that: The dust separation process includes a cyclone separator (2).

3. The blow-suction integrated dust collection device according to claim 1, characterized in that: Two adjacent Venturi tubes (101) can be close to or far from each other.

4. The blow-suction integrated dust collection device according to claim 3, characterized in that: A bellows (104) is connected between two adjacent Venturi tubes (101) and a telescopic mechanism (105) is installed to drive the two tubes to move closer or further apart.

5. The blow-suction integrated dust collection device according to claim 1, characterized in that: The collection cover (102) has an arc-shaped structure.

6. The blow-suction integrated dust collection device according to claim 1, characterized in that: The collection hood (102) extends downward to form a baffle (1024), which protrudes downward from the spray nozzle (1013).

7. The blow-suction integrated dust collection device according to claim 1, characterized in that: The return pipeline (103) is equipped with a flow regulating valve (106).

8. The blow-suction integrated dust collection device according to claim 2, characterized in that: The cyclone separator (2) is a horizontal structure.

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