Negative pressure suction device

Abstract

This invention relates to a negative pressure suction device, comprising: a main body, a valve assembly, and a negative pressure generating unit. The main body includes a valve passage, a first channel, a second channel, and a suction channel. The valve passage is provided with two ports arranged in different axial configurations along its transverse extension direction. The first channel allows gas to enter, one of the ports communicates with the first channel, and the other port communicates with the second channel. The suction channel is connected to the second channel. The valve assembly includes a valve body and a first sealing member. The valve body is movable between a connection position and a blocking position within the valve passage. The valve body and the valve passage together define a connection space. The first sealing member is disposed on the valve body. When the valve assembly is in the connection position, the connection space communicates with both ports. When the valve assembly is in the blocking position, the first sealing member is located between the connection space and at least one of the ports to block their communication. The negative pressure generating unit is arranged in the second channel to receive gas from the valve passage, thereby generating negative pressure suction to cause the fluid in the suction channel to flow toward the second channel.

Description

Technical Field

[0001] The present invention relates to a suction device, in particular to a negative pressure suction device. Prior Art

[0002] Devices that absorb fluids through negative pressure are used in various fields. For example, when replacing a car's radiator, a vacuum radiator water changer is used. Its working principle is based on the siphon and negative pressure effect. The water in the radiator is sucked out through the pressure difference. The common way to generate the pressure difference is a manual pump. However, the method of repeatedly manually actuating the pump body wastes too much time and energy, and the pressure difference generated is insufficient, resulting in insufficient suction and the inability to effectively and quickly extract the radiator water or other fluids.

[0003] Therefore, it is necessary to provide a novel and progressive negative pressure suction device to solve the above-mentioned problems. Summary of the invention

[0004] The main purpose of the present invention is to provide a negative pressure suction device, which can quickly generate a sufficient pressure difference by actuating a negative pressure generating unit through airflow, thereby effectively driving the fluid in the suction channel to flow toward the second channel.

[0005] To achieve the above-mentioned purpose, the present invention provides a negative pressure suction device, comprising: a main body, a valve assembly and a negative pressure generating unit. The main body includes a valve channel, a first channel, a second channel and a suction channel. The valve channel is provided with two ports in a non-coaxial arrangement in its lateral extension direction. The first channel is for gas to enter. One port is connected to the first channel, and the other port is connected to the second channel. The suction channel is connected to the second channel. The valve assembly includes a valve body and a first air-tight part. The valve body can be moved to a connecting position and a blocking position and is arranged on the valve channel. The valve body and the valve channel jointly define a connecting space. The first air-tight part is arranged on the valve body. When the valve assembly is located at the connecting position, the connecting space is connected to the two ports respectively. When the valve assembly is located at the blocking position, the first air-tight part is located between the connecting space and at least one of the ports to block the connection between the two. The negative pressure generating unit is arranged on the second channel to receive the gas from the valve channel, thereby generating a negative pressure suction force to make the fluid in the suction channel flow toward the second channel. Simple diagram description

[0006] FIG. 1 is a three-dimensional diagram of a vacuum water tank water changer according to an embodiment of the present invention. FIG. 2 is a perspective view of a negative pressure suction device according to an embodiment of the present invention. FIG. 3 is an exploded view of FIG. 2 . FIG. 4 is a cross-sectional view of FIG. 2 . FIG. 5 is a partial enlarged view of FIG. 4 . FIG. 6 is another partial enlarged view of FIG. 4 . FIG. 7 is a schematic diagram of the valve body of FIG. 5 being switched to a blocking position. FIG8 is a cross-sectional view of a main body according to an embodiment of the present invention. Implementation

[0007] The following are only examples of possible implementations of the present invention, but are not intended to limit the scope of the present invention. The "one" or "at least one" preceding the nouns mentioned in the text does not limit the quantity, and it can also be "plural" according to needs. This change in quantity is also within the scope of the protection, which is stated in advance.

[0008] Please refer to Figures 1 to 8, which show an embodiment of the present invention. The negative pressure suction device of the present invention includes: a main body 1, a valve assembly 2 and a negative pressure generating unit 3.

[0009] The body 1 includes a valve channel 11, a first channel 13, a second channel 14 and a suction channel 15. The valve channel 11 is provided with two ports in a non-coaxial arrangement in a lateral extension direction. The first channel 13 is for gas to enter. One port is connected to the first channel 13, and the other port is connected to the second channel 14. The suction channel 15 is connected to the second channel 14. The radial dimension of the port connected to the second channel 14 is larger than the radial dimension of the port connected to the first channel 13, so as to ensure that the resistance encountered by the gas flowing into the second channel 14 is smaller.

[0010] In this embodiment, the first channel 13 and the second channel 14 extend in a straight line, and the maximum radial dimension of the first channel 13 is larger than the maximum radial dimension of the second channel 14, so as to receive more high-pressure gas. In addition, an inlet joint 51 is screwed to the first channel 13, and an exhaust joint 52 is screwed to the second channel 14. The exhaust joint 52 is located at the center of the body 1, and the inlet joint 51 is eccentrically arranged on one side of the body 1.

[0011] The valve assembly 2 includes a valve body 21 and a first air-tight member 24. The valve body 21 is movable between a connecting position and a blocking position and is arranged on the valve channel 11. The valve body 21 and the valve channel 11 jointly define a connecting space 26. The first air-tight member 24 is arranged on the valve body 21. When the valve assembly 2 is located at the connecting position, the connecting space 26 is connected to the two ports respectively. When the valve assembly 2 is located at the blocking position, the first air-tight member 24 is located between the connecting space 26 and at least one of the ports to block the connection between the two.

[0012] More specifically, the moving direction of the valve body 21 is transverse to the extending direction of the first channel 13, and the user can use the inlet connector 51 on one side as a reference, and can quickly determine whether the valve body 21 is in the connecting position or the blocking position. More specifically, the valve body 21 extends in a columnar shape, and includes a base 22 and an annular recess 23, the annular recess 23 is recessed in the base 22, and the first airtight member 24 is sleeved on the base 22. When the valve body 21 is inserted into the valve channel 11, the first airtight member 24 is attached to the wall surface of the valve channel 11, and the annular recess 23 and the wall surface of the valve channel 11 jointly define the connecting space 26.

[0013] Preferably, the negative pressure suction device further comprises a first positioning unit 41 and two second positioning units 44, the first positioning unit 41 is arranged on the body 1, the two second positioning units 44 are arranged on the valve body 21 at intervals, the first positioning unit 41 can be detachably combined with one of the two second positioning units 44, so that the valve body 21 can be stably positioned at the blocking position or the connecting position. In this embodiment, the first positioning unit 41 comprises a spring 42 and a positioning bead 43, each of the second positioning units 44 is a positioning groove, the spring 42 and the positioning bead 43 are accommodated in a positioning groove 19 of the body 1, and the positioning bead 43 is resisted by the spring 42 and remains protruding from the positioning groove 19 to selectively embed into one of the second positioning units 44.

[0014] The opening connected to the first channel 13 is defined as an inlet 111, and the opening connected to the second channel 14 is defined as an outlet 112. In the extension direction of the valve channel 11, the outlet 112 is between the first positioning unit 41 and the inlet 111; wherein, in the extension direction perpendicular to the valve channel 11, the first positioning unit 41 and the inlet 111 are located on the same side of the valve channel 11, and the outlet 112 is located on the other side of the valve channel 11. In this embodiment, in the extension direction of the valve channel 11, the ratio of the outlet 112 to the inlet 111 is greater than 1.2, and the size of the annular recess 23 is at least twice the size of the inlet 111.

[0015] It should be emphasized that when the valve assembly 2 is located at the blocking position, since the inlet 111 and the outlet 112 are non-coaxially offset, the inlet 111 can be kept in communication with the communication space 26. At this time, the first gas-tight member 24 is located between the communication space 26 and the outlet 112 to block the gas from flowing out of the outlet 112. In other words, no matter whether the valve body 21 is located at the blocking position or the communication position, the communication space 26 is kept in a state where high-pressure gas exists, that is, the pressure of the communication space 26 can be maintained at a high pressure. When the valve body 21 moves from the communication position to the blocking position and then returns to the communication position, the high-pressure gas can be directly ejected from the outlet 112 quickly to quickly actuate the negative pressure unit and minimize the reaction time of restarting.

[0016] Preferably, the valve assembly 2 further includes two second air-tight parts 25, the two second air-tight parts 25 are arranged on the valve body 21 and located at two opposite ends of the connecting space 26, each of the second air-tight parts 25 is used to block the connecting space 26 from communicating with the outside, and the first air-tight part 24 is between the two second air-tight parts 25; wherein, when the valve assembly 2 is located at the blocking position, the inlet 111 is between one side of the first air-tight part 24 and one of the second air-tight parts 25, and the outlet 112 is between the other side of the first air-tight part 24 and the other second air-tight part 25.

[0017] The negative pressure generating unit 3 is disposed in the second channel 14 to receive the gas from the valve channel 11 , thereby generating negative pressure suction to make the fluid in the suction channel 15 flow toward the second channel 14 .

[0018] In more detail, the negative pressure generating unit 3 includes a nozzle 31 and a tube body 32, the nozzle 31 includes an air inlet 311 and an air outlet 312, the tube body 32 includes a receiving tube portion 321, an intermediate tube portion 322 and a discharge tube portion 323 connected in sequence, the air inlet 311 is connected to the through port (the outlet 112), the air outlet 312 faces the receiving tube portion 321, and a gap 16 is defined between the wall portion surrounding the second channel 14 and the nozzle 31 and the receiving tube portion 321, and the gap 16 is connected to the interior of the suction channel 15, the air outlet 312 and the receiving tube portion 321 respectively; wherein, the fluid of the suction channel 15 flows into the interior of the receiving tube portion 321 through the gap 16.

[0019] More specifically, the nozzle 31 further includes a gradually contracting channel 313, an extending channel 314 and an expanding channel 315 which are connected in sequence. The gradually contracting channel 313 is connected to the air inlet 311, and the expanding channel 315 is connected to the air outlet 312. The gradually contracting channel 313 is gradually contracted toward the extending channel 314, and the expanding channel 315 is gradually expanded away from the extending channel 314 so that the gas can be widely ejected, and then can be fully mixed with the fluid from the suction channel 15 and enter the interior of the receiving tube part 321. In addition, the inner diameter of the receiving tube part 321 is larger than the air outlet 312. The inner diameter of the receiving tube part 321 is gradually contracted toward the middle tube part 322, and the inner diameter of the discharge tube part 323 is gradually expanded away from the middle tube part 322.

[0020] It is worth mentioning that the body 1 further includes a first component 17 and a second component 18, and the two sides of the nozzle 31 are respectively connected to the first component 17 and the second component 18, and the first component 17 and the second component 18 are connected as a whole through the nozzle 31. Obviously, the nozzle 31 has multiple functions. The nozzle 31 is not only a part of the negative pressure unit, but also a connecting piece that connects the first component 17 and the second component 18 in series. In this embodiment, the two sides of the nozzle 31 are respectively screwed to the first component 17 and the second component 18 for quick assembly, disassembly and replacement, and the negative pressure generating unit 3 further includes a third airtight member 33, and the third airtight member 33 is clamped between the first component 17 and the nozzle 31.

[0021] It should be additionally explained that the negative pressure suction device can be connected to a replacement assembly 61 to form a vacuum water tank water changer 6, and the replacement assembly includes a pressure gauge 62, a connecting body 63, a gas valve group 64, a water tank valve group 65 and a conveying assembly 66. The pressure gauge 62 is arranged on the connecting body 63, the gas valve group 64 is connected to the suction channel 15 and the connecting body 63, the water tank valve group 65 is arranged on the connecting body 63 for cooling liquid to flow in, and the conveying assembly 66 is arranged on the connecting body 63 for connecting the water tank. The conveying assembly 66 can selectively connect the suction channel 15 or the water tank valve group 65.

[0022] 1: Ontology 11: Valve channel 111: Entrance 112: Exit 13: First channel 14: Second channel 15: Absorption channel 16: Gap 17: First Component 18: Second component 19: Positioning slot 2: Valve assembly 21: Valve body 22: Base 23: Ring concave part 24: First airtight part 25: Second airtight part 26: Connected Space 3: Negative pressure generating unit 31: Nozzle 311: Air Inlet 312: Jet port 313: Gradually Converging Channel 314: Extension Channel 315: Expansion Channel 32:Tube body 321: Receiving pipe 322: Intermediate pipe 323: discharge pipe 33: Third airtight part 41: First positioning unit 42: Spring 43: Positioning beads 44: Second positioning unit 51: Air intake connector 52: Exhaust connector 6: Vacuum tank water changer 61: Replace the assembly 62: Pressure gauge 63: Connected Subject 64: Valve group 65: Water tank valve group 66:Conveying components

Claims

1. A negative pressure suction device, comprising: A main body includes a valve channel, a first channel, a second channel and a suction channel, the valve channel is provided with two ports in a non-coaxial arrangement in its lateral extension direction, the first channel is for gas to enter, one port is connected to the first channel, the other port is connected to the second channel, and the suction channel is connected to the second channel; a valve assembly includes a valve body and a first air-tight part, the valve body is movable between a connecting position and a blocking position and is arranged on the valve channel, the valve body and the valve channel jointly define a connecting space, the first air-tight part is arranged on the valve body, when the valve assembly is located at the connecting position, the connecting space is connected to the two ports respectively, when the valve assembly is located at the blocking position, the first air-tight part is located between the connecting space and at least one of the ports to block the connection between the two; and a negative pressure generating unit is arranged in the second channel to receive the gas from the valve channel, thereby generating negative pressure suction to make the fluid in the suction channel flow toward the second channel.

2. The negative pressure suction device as described in claim 1 further comprises a first positioning unit and two second positioning units, wherein the first positioning unit is disposed on the main body, and the two second positioning units are disposed on the valve body at intervals, and the first positioning unit can be detachably combined with one of the two second positioning units.

3. The negative pressure suction device as described in claim 2, wherein the port connected to the first channel is defined as an inlet, and the port connected to the second channel is defined as an outlet, and in the extension direction of the valve channel, the outlet is between the first positioning unit and the inlet; wherein, In the extending direction perpendicular to the valve channel, the first positioning unit and the inlet are located on the same side of the valve channel, and the outlet is located on the other side of the valve channel.

4. A negative pressure suction device as described in claim 1, wherein the port connected to the first channel is defined as an inlet, and the port connected to the second channel is defined as an outlet, and when the valve assembly is located in the blocking position, the inlet remains connected to the connecting space, and the first air-tight part is located between the connecting space and the outlet.

5. The negative pressure suction device as claimed in claim 4, wherein the valve assembly further comprises two second airtight members, the two second airtight members are disposed on the valve body and located at two opposite ends of the communication space, each of the second airtight members is used to block the communication space from being connected to the outside, and the first airtight member is located between the two second airtight members; wherein, When the valve assembly is located at the blocking position, the inlet is between one side of the first airtight member and one of the second airtight members, and the outlet is between the other side of the first airtight member and another of the second airtight members.

6. The negative pressure suction device according to claim 1, wherein: The radial dimension of the through-port connected to the second channel is greater than the radial dimension of the through-port connected to the first channel.

7. A negative pressure suction device as described in claim 1, wherein the valve body extends in a columnar shape, and the valve body includes a base and an annular recess, the annular recess is recessed in the base, and the first air-tight part is sleeved on the base, and when the valve body is inserted into the valve channel, the first air-tight part is abutted against the wall of the valve channel, and the annular recess and the wall of the valve channel jointly define the connecting space.

8. A negative pressure suction device as described in any one of claims 1 to 7, wherein the negative pressure generating unit comprises a nozzle and a tube body, the nozzle comprises an air inlet and an air outlet, the tube body comprises a receiving tube portion, an intermediate tube portion and a discharge tube portion connected in sequence, the air inlet is connected to the through port, the air outlet faces the receiving tube portion, a gap is defined between the wall portion surrounding the second channel and the nozzle and the receiving tube portion, and the gap is connected to the suction channel, the air outlet and the interior of the receiving tube portion respectively; wherein, The fluid in the suction channel flows into the interior of the receiving tube portion through the gap.

9. The negative pressure suction device as described in claim 8, wherein the main body further comprises a first component and a second component, two sides of the nozzle are respectively connected to the first component and the second component, and the first component and the second component are connected into one body via the nozzle.

10. A negative pressure suction device as described in claim 3, wherein when the valve assembly is located at the blocking position, the inlet remains connected to the connecting space, and the first airtight member is located between the connecting space and the outlet; the valve assembly further comprises two second airtight members, the two second airtight members are arranged on the valve body and located at two opposite ends of the connecting space, each of the second airtight members is used to block the connecting space from connecting with the outside, and the first airtight member is located between the two second airtight members; wherein, When the valve assembly is in the blocking position, the inlet is between one side of the first airtight member and the second airtight member, and the outlet is between the other side of the first airtight member and the second airtight member; the radial dimension of the opening connected to the second channel is larger than the radial dimension of the opening connected to the first channel; the valve body extends in a columnar shape, and the valve body includes a base and an annular recess, the annular recess is recessed in the base, and the first airtight member is sleeved on the base. When the valve body is inserted into the valve channel, the first airtight member is attached to the wall of the valve channel, and the annular recess and the wall of the valve channel jointly define the connecting space; the negative pressure generating unit includes a nozzle and a tube body, The nozzle includes an air inlet and an air jet, and the tube body includes a receiving tube part, an intermediate tube part and a discharge tube part connected in sequence. The air inlet is connected to the through port, and the air jet is directed toward the receiving tube part. A gap is defined between the wall part surrounding the second channel and the nozzle and the receiving tube part, and the gap is connected to the suction channel, the air jet and the interior of the receiving tube part respectively; wherein the fluid of the suction channel flows into the interior of the receiving tube part through the gap; the body further includes a first component and a second component, and the two sides of the nozzle are connected to the first component and the second component respectively, and the first component and the second component are connected into one body through the nozzle; the first positioning unit The invention comprises a spring and a positioning bead, each of the second positioning units is a positioning groove, the spring and the positioning bead are accommodated in a positioning groove of the body, the positioning bead is supported by the spring and remains protruding from the positioning groove to selectively embed one of the second positioning units; in the extension direction of the valve channel, the ratio of the outlet to the inlet is greater than 1.2; in the extension direction of the valve channel, the size of the annular recess is at least 2 times the size of the inlet; the nozzle further comprises a tapered channel, an extension channel and an expansion channel which are connected in sequence, the tapered channel is connected to the air inlet, the expansion channel is connected to the air jet, the tapered channel is tapered toward the extension channel, and the expansion channel is away from the extension channel. The inner diameter of the receiving tube portion is larger than the jet port, the inner diameter of the receiving tube portion is gradually contracted toward the middle tube portion, and the inner diameter of the discharge tube portion is gradually expanded away from the middle tube portion; the first channel and the second channel are respectively extended in a straight line, and the maximum radial dimension of the first channel is larger than the maximum radial dimension of the second channel; an air inlet joint is screwed to the first channel, and an air outlet joint is screwed to the second channel; the two sides of the nozzle are respectively screwed to the first component and the second component; the moving direction of the valve body is transverse to the extension direction of the first channel; the negative pressure generating unit further includes a third airtight member, and the third airtight member is clamped between the first component and the nozzle.

Images