A suction device

Abstract

The present invention discloses a suction device, which is provided with a suction nozzle, a mixed fluid passage communicating with the suction nozzle, a separation chamber communicating with the mixed fluid passage, a liquid storage space communicating with the separation chamber, a gas flow passage communicating with the separation chamber, and a suction module for sucking external substances into the suction device through the suction nozzle. The suction module is arranged in the mixed fluid passage and is close to the suction nozzle. In the present invention, the suction module is placed in the mixed fluid passage near the suction nozzle. The suction module sucks the mixture outside the suction device through a short section in the mixture passage and the suction nozzle, and discharges it into the separation chamber. The distance for sucking the mixture is short, and the separation chamber is placed at the rear of the suction module, with small air resistance. Therefore, the suction intensity is high and the suction efficiency is high.

Description

Technical Field

[0001] The present invention relates to a cleaning device, specifically to a cleaning device for hard surfaces. Background Art

[0002] To clean a hard surface (such as a glass wall), a cleaning liquid and a suction device are required. The cleaning liquid separates the dirt from the hard surface, and the suction device absorbs the separated dirt and cleaning liquid. To enable the normal operation of the suction device, the suction device is provided with an exhaust structure, and the cleaning liquid mixed with dirt needs to be received by a container.

[0003] According to the prior art, a suction module driven by a motor is generally placed in a gas flow channel, or is communicated with the gas flow channel but placed at the tail of the gas flow channel. Among them, the substance flowing in the gas flow channel is the gas after liquid separation, and the mixed material flow channel before gas-liquid separation is connected to the front end of the gas flow channel. For example, the portable hard surface suction device described in the patent document with international publication number WO 2009 / 086891A1. In this way, the suction module is far from the suction port. In addition, the separation device is arranged in front of the suction module, resulting in a large air resistance. This leads to a low suction intensity and a low suction efficiency of the suction device. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to improve the suction intensity of the hard surface suction device.

[0005] To solve the above technical problem, the present invention provides the following technical solution: A suction device is provided with a suction nozzle, a mixed material flow channel communicating with the suction nozzle, a separation chamber communicating with the mixed material flow channel, a liquid storage space communicating with the separation chamber, a gas flow channel communicating with the separation chamber, and a suction module for sucking external substances into the suction device through the suction nozzle. The suction module is arranged in the mixed material flow channel between the suction nozzle and the separation chamber. The negative pressure channel of the suction nozzle and the suction module forms a fluid connection, and the positive pressure channel of the separation chamber and the suction module forms a fluid connection.

[0006] The present invention places the suction module in the mixed material flow channel near the suction nozzle. The suction module sucks the mixture outside the suction device through a small section in the mixture channel and the suction nozzle, and discharges it into the separation chamber. The distance for sucking the mixture is short, and the separation chamber is placed behind the suction module, resulting in a small air resistance. Therefore, the suction intensity is large and the suction efficiency is high. Brief Description of the Drawings

[0007] The following further describes the present invention with reference to the drawings:

[0008] Figure 1 is a schematic diagram of the suction device;

[0009] Figure 2 is Figure 1 a partial cross-sectional view of

[0010] Figure 3 For Figure 1 Schematic diagram of valve 70 in

[0011] Explanation of symbols in the figure:

[0012] 10. Nozzle; 11. Inlet of the nozzle;

[0013] 20. Mixed fluid flow channel; 21. Cylindrical chamber; 22. Outlet end of the mixed fluid flow channel;

[0014] 30. Separation chamber;

[0015] 40. Gas flow channel; 41. Inlet end of the gas flow channel; 42. Outlet of the gas flow channel;

[0016] 50. Suction module; 51. Motor; 52. Blades;

[0017] 60. Liquid storage container;

[0018] 70. Valve; 71. Valve body; 72. Valve core; 73. Liquid inlet; 74. Liquid outlet;

[0019] 80. Housing of the suction device; 81. Circuit board. Detailed implementation mode

[0020] Such as Figure 1 , a suction device, which can be a handheld suction device, is provided with a nozzle 10, a mixed fluid flow channel 20 communicated with the nozzle, a separation chamber 30 communicated with the mixed fluid flow channel, a liquid storage space communicated with the separation chamber, a gas flow channel 40 communicated with the separation chamber, and a suction module 50 for sucking external substances into the suction device through the nozzle. The suction module 50 is arranged in the mixed fluid flow channel between the nozzle 10 and the separation chamber 30. The negative pressure channels of the nozzle 10 and the suction module 50 form a fluid connection, and the positive pressure channels of the separation chamber 30 and the suction module 50 form a fluid connection. Among them, the suction module is close to the nozzle.

[0021] In the above, one end of the suction module 50 sucks air and the other end exhausts air. The air suction end is provided with a negative pressure channel, and the air exhaust end is provided with a positive pressure channel. The mixed fluid flow channel includes a flow channel connected to the negative pressure channel of the nozzle 10 and the suction module 50, and a flow channel connected to the separation chamber 30 by the positive pressure channel of the suction module 50.

[0022] In the above, the negative pressure channels of the nozzle 10 and the suction module 50 form a fluid connection, which means that the gas-liquid mixture, as a kind of fluid, can flow from the nozzle 10 to the negative pressure channel of the suction module 50.

[0023] As described above, the positive pressure channel of the separation chamber 30 and the suction module 50 form a fluid connection, which means that the gas-liquid mixture can flow from the positive pressure channel of the suction module 50 to the separation chamber 30.

[0024] In actual operation, first, a cleaning liquid is sprayed on the hard surface, and the suction nozzle 10 is closely attached to the hard surface and displaced, which helps the dirt on the hard surface to fall off and mix with the cleaning liquid. The suction module 50 operates, and a negative pressure is formed in the mixture channel between the suction module and the suction nozzle to suck the gas-liquid mixture on the hard surface; a positive pressure is formed in other parts of the mixture channel to quickly transport the gas-liquid mixture to the separation chamber 30. Then, under the action of the positive pressure, the gas-liquid mixture first enters the liquid storage space, and then the gas floating on the liquid surface is discharged from the suction device through the gas flow channel 40 (in this way of gas discharge, some harmful substances in the gas can be dissolved in the liquid, and the liquid plays a filtering role for the gas).

[0025] Such as Figure 2 , the suction module 50 includes a motor 51 and a blower 52. The blower is located in the cylindrical chamber 21, the motor is located outside the cylindrical chamber, the motor shaft extends into the cylindrical chamber and is connected to the blower, and a seal is provided between the motor shaft and the cylindrical chamber; the cylindrical chamber is a part of the mixture flow channel 20. The function of the seal is to prevent water and air leakage. Driven by the motor, the blower rotates, a negative pressure is formed in the mixture channel between the suction nozzle 10 and the cylindrical chamber 21, and a positive pressure is formed in other parts of the mixture channel. This positive pressure extends to the liquid storage space and the gas flow channel 40, accelerating the flow, separation of the gas-liquid mixture and the discharge of the gas.

[0026] The suction device is provided with a circuit board 81 and a power supply unit. The power supply unit is connected to the motor 51 of the suction module 50 through the circuit board. A button connected to the circuit board is provided on the suction device for controlling the rotation speed, start and stop of the motor.

[0027] The suction nozzle 10 is flat, and the inlet 11 of the suction nozzle is long and narrow. One end of the suction nozzle with the inlet contacts the hard surface. The long and narrow design of the inlet can block substances with larger sizes from entering the suction device while absorbing the gas-liquid mixture in a large flow rate, avoiding damage to the suction module 50 caused by larger substances and ensuring the normal operation of the suction module.

[0028] Taking the suction module 50 as the demarcation point, the mixture channel from the suction module to the suction nozzle 10 is the first mixture channel, and the mixture channel from the suction module to the separation chamber 30 is the second mixture channel. In an ideal usage scenario, the suction device is in an upright state, such as Figure 1In the state shown, the suction nozzle 10 is in contact with a vertical rigid surface. The first mixture channel is in an inclined upward and nearly horizontal state, and the second mixture channel is in a vertical state. In such a usage scenario, under the action of positive pressure and gravity in the second mixture channel, the liquid in the gas-liquid mixture easily falls into the liquid storage space, and the gas is blown into the gas flow passage 40 and discharged from the suction device. However, the actual usage scenarios are complex, and the suction device may not be in an upright state. If the positive pressure in the second mixture channel is small, it becomes difficult for the liquid in the gas-liquid mixture to enter the liquid storage space, and it also becomes difficult for the gas to enter the gas flow passage 40. For this reason, the present invention can increase the output power of the motor 51 according to the prior art, or set a button to facilitate the operator to selectively increase the output power of the motor, so that the positive pressure of the suction module 50 on the mixture flow channel 20 can transport the gas-liquid mixture in the mixture flow channel of the suction device at any angle to the separation chamber 30, wherein the liquid can smoothly enter the liquid storage space, and the gas can smoothly enter the gas flow passage 40.

[0029] The inlet of the liquid storage space is located below the separation chamber 30. The outlet end 22 of the mixture flow channel is located in the upper left of the separation chamber, and the inlet end 41 of the gas flow channel is located in the upper right of the separation chamber. According to such a structural design, firstly, the liquid in the gas-liquid mixture easily falls into the liquid storage space; secondly, there is positive pressure in the mixture flow channel 20, and the gas in the liquid storage space floats back into the mixture flow channel instead of entering the gas flow passage 40; thirdly, under the action of the positive pressure in the mixture flow channel 20, the gas in the separation chamber 30 and the gas from the liquid storage space are easily discharged from the suction device through the gas flow passage.

[0030] The liquid storage space can be a space attached to the housing of the suction device itself and is an integral structure with the housing of the suction device, or it can be the internal cavity of a liquid storage container 60 assembled inside or outside the housing of the suction device. The liquid storage container is detachably connected to the suction device, which is convenient for the operator to pour the liquid in the liquid storage container and is also convenient for the operator to clean, maintain, and replace the liquid storage container.

[0031] As Figure 1 , a valve 70 is provided at the inlet of the liquid storage container 60. As Figure 3 , the valve includes a valve body 71 and a valve core 72. The valve body is provided with a liquid inlet 73 and a liquid outlet 74. The valve core is movably fitted in the valve body, and the valve core can block the liquid inlet under the action of gravity. In an ideal usage scenario, when the suction device is in an upright state, the valve core moves away from the liquid inlet under the action of gravity, and the liquid inlet is opened; when in a non-upright state, the valve core approaches the liquid inlet and blocks the liquid inlet under the action of gravity to prevent the liquid in the liquid storage container from flowing back into the separation chamber 30 and the mixture flow channel 20. As an option, the valve core 72 is a steel ball.

[0032] Alternatively, the valve 70 is fixed to the suction device, and the liquid storage container 60 is detachably connected to the valve. After the liquid storage container is removed, the valve remains on the suction device.

[0033] Alternatively, the valve 70 is fixed to the liquid storage container 60, the suction device is detachably connected to the valve, and the valve and the liquid storage container are removed from the suction device together.

[0034] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A suction device, provided with a suction nozzle (10), a mixed fluid passage (20) communicating with the suction nozzle, a separation chamber (30) communicating with the mixed fluid passage, a liquid storage space communicating with the separation chamber, a gas flow passage (40) communicating with the separation chamber, and a suction module (50) for sucking external substances into the suction device through the suction nozzle, characterized in that: The suction module is arranged in the mixed fluid flow channel between the suction nozzle (10) and the separation chamber (30). A fluid connection is formed between the negative pressure channel of the suction nozzle (10) and the suction module (50), and a fluid connection is formed between the positive pressure channel of the separation chamber (30) and the suction module (50). The suction module (50) includes a motor (51) and a wind blade. The wind blade is located in the cylindrical chamber (21), the motor is located outside the cylindrical chamber, the motor shaft extends into the cylindrical chamber and is connected to the wind blade, and a seal is provided between the motor shaft and the cylindrical chamber. The cylindrical chamber is a part of the mixed fluid flow channel (20). Both the suction nozzle and the cylindrical chamber (21) are located above the suction device. The suction module is close to the suction nozzle. The inlet of the liquid storage space is located below the separation chamber (30), the outlet end (22) of the mixed fluid flow channel is located at the upper left of the separation chamber, and the inlet end (41) of the gas flow channel is located at the upper right of the separation chamber. The liquid in the gas-liquid mixture falls into the liquid storage space. There is positive pressure in the mixed fluid flow channel (20), and the gas in the liquid storage space enters the gas flow channel (40). Under the action of the positive pressure in the mixed fluid flow channel (20), the gas in the separation chamber (30) and the gas from the liquid storage space are easily discharged from the suction device through the gas flow channel.

2. The suction device according to claim 1, characterized in that: The suction nozzle (10) is flat, and the inlet (11) of the suction nozzle is long and narrow.

3. The suction device according to claim 1, characterized in that: The positive pressure of the suction module (50) on the mixed fluid flow channel (20) can transport the gas-liquid mixture in the mixed fluid flow channel of the suction device at any angle to the separation chamber (30).

4. The suction device according to claim 1, characterized in that: The inlet of the liquid storage space is located below the separation chamber (30), the outlet end (22) of the mixed fluid flow channel is located on one side of the separation chamber, and the inlet end (41) of the gas flow channel is located on the other side of the separation chamber.

5. The suction device according to claim 1, characterized in that: A water baffle is arranged around the air outlet of the gas flow channel (40).

6. The suction device according to claim 1, characterized in that: The liquid storage space is the internal cavity of the liquid storage container (60), and the liquid storage container is detachably connected to the suction device.

7. The suction device according to claim 6, characterized in that: A valve (70) is provided at the inlet of the liquid storage container (60). The valve includes a valve body (71) and a valve core (72). The valve body is provided with a liquid inlet (73) and a liquid outlet (74). The valve core is movably fitted in the valve body, and the valve core can block the liquid inlet under the action of gravity.

8. The suction device according to claim 7, characterized in that: The valve (70) is fixed on the suction device, and the liquid storage container (60) is detachably connected to the valve.

9. The suction device according to claim 7, characterized in that: The valve (70) is fixed on the liquid storage container (60), and the suction device is detachably connected to the valve.

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