Small negative pressure machine

Abstract

The utility model belongs to the technical field of water-gas separation equipment, and particularly relates to a small-sized negative pressure machine which comprises a separation device, a vacuum device, a liquid level sensing device and a liquid outlet device, and the vacuum device and the liquid outlet device are both arranged at the bottom of the separation device. One end of the vacuum device and one end of the liquid outlet device are both communicated with the separation device, the liquid level sensing device is arranged at the top position in the separation device, and one end of the vacuum device extends into the separation device and is connected with an air channel of the liquid level sensing device; through the structural arrangement, the requirement of the negative pressure machine is lowered, and meanwhile the liquid level sensing sensitivity is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water-gas separation equipment, in particular to a small negative pressure machine. Background Art

[0002] Dental surgery requires the extraction of saliva from the patient's mouth and the splashing mist generated by surgical tools. This accumulated saliva and the splashing mist generated by surgical tools are extracted through a dehumidifier within the medical device. A dehumidifier is a dehumidifier that separates free water from the airflow using mechanical or kinetic energy methods. Prior art techniques incorporate a negative pressure cyclone separator within the dehumidifier to achieve centrifugal negative pressure separation of the airflow, ultimately fulfilling the dehumidifier's separation function. However, prior art techniques for using negative pressure cyclone separators for separation suffer from technical issues such as control delays and low adjustment sensitivity. Utility Model Content

[0003] The purpose of the utility model is to provide a small negative pressure machine, aiming to solve the technical problem of low control sensitivity of small negative pressure machines in the prior art.

[0004] To achieve the above-mentioned purpose, an embodiment of the present invention provides a small negative pressure machine, including a separation device, a vacuum device, a liquid level sensing device and a liquid discharge device. The vacuum device and the liquid discharge device are both arranged at the bottom of the separation device, and one end of the vacuum device and the liquid discharge device are both connected to the separation device. The liquid level sensing device is arranged at the top position inside the separation device, and one end of the vacuum device extends into the separation device and is connected to the airway of the liquid level sensing device.

[0005] Preferably, the liquid level sensing device includes a mounting seat, a sensing device and a float, the mounting seat is installed at the top position in the separation device, and the air duct is arranged on the mounting seat, one end of the vacuum device is connected to the mounting seat, the float is fixedly installed on the mounting seat, the float is movably connected to the mounting seat up and down, and the sensing device is located above the float.

[0006] Preferably, a first mounting hole and a second mounting hole are also provided on the mounting seat, one end of the vacuum device is connected to one end of the first mounting hole, one end of the float is movably installed up and down in the second mounting hole, one end of the air duct is connected to the bottom of the mounting seat, the other end of the air duct is connected to the other end of the first mounting hole, and the sensing device is arranged across the other end of the second mounting hole.

[0007] Preferably, a plurality of limiting protrusions are arranged at intervals on the inner side wall of the second mounting hole, and each of the limiting protrusions is arranged close to the bottom opening of the second mounting hole.

[0008] Preferably, the vacuum device includes a connecting pipe, a vacuum generator and a silencer, the silencer is fixedly installed on the bottom of the separation device, one end of the connecting pipe is connected to the mounting seat, and one end of the connecting pipe is communicated with the airway, one end of the vacuum generator is arranged in the other end of the connecting pipe, and the other end of the connecting pipe is communicated with the silencer, and the other end of the vacuum generator is located in the vacuum generator and communicated with an external pipeline.

[0009] Preferably, the liquid outlet device includes a support frame, a sealing cover and a connecting tube, the support frame and the connecting tube are both installed at the bottom of the separation device, and the connecting tube is connected to the separation device, the support frame is connected to the inner bottom surface of the separation device, the sealing cover is arranged in the support frame, and a return spring is provided between the support frame and the sealing cover to keep the sealing cover abutting against the bottom of the support frame opening.

[0010] Preferably, the support frame includes a mounting ring and three U-shaped plates, the mounting ring is installed in the separation device, one end of each U-shaped plate is fixedly installed at the bottom of the mounting ring, and each U-shaped plate is enclosed and spaced apart, and the other end of each U-shaped plate is connected and located under the cover to support the reset spring.

[0011] Preferably, the separation device includes a separation cover, a filtering device and a separation tank, the vacuum device and the liquid outlet device are both arranged at the bottom of the separation tank, the liquid level sensing device is arranged at the bottom of the separation cover, the separation cover is installed at the top position in the separation tank, the filtering device is arranged at the top of the separation cover, and the filtering device is connected to the input port of the separation tank.

[0012] Preferably, a plurality of inclined ridges are provided at intervals on the side surface of the separation cover, and each of the inclined ridges abuts against the inner wall of the separation tank. A placement groove is provided in the center of the upper surface of the separation cover, and the filter device is located in the placement groove.

[0013] Preferably, a wire outlet hole for external connection of the liquid level sensing device is provided at the bottom of the separation device.

[0014] The above one or more technical solutions in the small negative pressure machine provided by the embodiment of the utility model have at least one of the following technical effects:

[0015] The small negative pressure machine in the present invention is assembled from a separation device, a vacuum device, a liquid level sensing device and a liquid discharge device. The separation device is used to filter gas and residue from the absorbed liquid. The vacuum device is used to generate negative pressure inside the separation device to smoothly absorb the liquid. The liquid level sensing device is used to sense the volume of liquid stored in the separation device. The liquid discharge device is used to output the liquid separated from the separation device. During assembly, the liquid level sensing device is installed in the separation device to sense the liquid volume in the separation device. The vacuum device and the liquid discharge device are both installed at the bottom of the separation device, and the output end of the vacuum device extends into the separation device and is connected to the liquid level sensing device located at the top of the separation device. At the same time, the vacuum device is connected to the airway above the liquid level sensing device, thereby achieving communication between the vacuum device and the internal space of the separation device. The vacuum device changes the pressure inside the separation device. The vacuum generator provided in the vacuum device can effectively reduce the power requirement of the negative pressure machine, so that the liquid can be smoothly absorbed by the separation device. When the liquid in the separation device is stored to a certain amount, it is discharged through the liquid discharge device. Through the above structural arrangement, accurate perception of page height is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 This is an exploded view of the small negative pressure machine provided in an embodiment of the present utility model.

[0018] Figure 2 for Figure 1 A partial enlarged view of middle A.

[0019] Figure 3 This is a rendering of the small negative pressure machine provided in an embodiment of the utility model.

[0020] Figure 4 This is a cross-sectional view of a small negative pressure machine provided in an embodiment of the present invention.

[0021] Figure 5 A top view of the mounting base of the small negative pressure machine provided in an embodiment of the present utility model.

[0022] Figure 6 For the Figure 5 Sectional view along the midline BB.

[0023] Figure 7 This is a rendering of the support frame of the small negative pressure machine provided in an embodiment of the utility model.

[0024] Figure 8 This is a diagram showing the disassembly relationship between the separation tank and the bottom plate of the small negative pressure machine provided in an embodiment of the utility model.

[0025] Among them, the reference numerals in the figures are:

[0026] 10—Separation device 11—Separation cover 12—Filter device

[0027] 13—Separation tank 20—Vacuum device 21—Connecting pipe

[0028] 22 - Vacuum generator 23 - Silencer 30 - Liquid level sensor

[0029] 31 - Mounting seat 32 - Sensing device 33 - Buoy

[0030] 40 - liquid outlet device 41 - support frame 42 - cover

[0031] 43—Connecting tube 111—Inclined ridge 112—Placement groove

[0032] 131 — bottom plate 311 — first mounting hole 312 — second mounting hole

[0033] 313—Air duct 411—Mounting ring 412—U-shaped plate. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention in detail. Figures 1 to 8 , wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be understood as limiting the present invention.

[0035] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0037] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0038] In one embodiment of the present invention, Figure 1 and Figures 3-4 As shown, a small negative pressure machine is provided, including a separation device 10, a vacuum device 20, a liquid level sensing device 30 and a liquid discharge device 40. The separation device 10 is used to filter and separate gas and residue in the liquid, and the vacuum device 20 is used to change the pressure inside the separation device 10 to realize the suction function. The vacuum device 20 is assisted to reduce the suction requirement of the connected equipment. The liquid level sensing device 30 accurately senses the change in the liquid level height, and the liquid discharge device 40 discharges the liquid according to the change in the pressure of the liquid inside the separation device 10 on the bottom surface. The vacuum device 20 and the liquid discharge device 40 are both arranged at the bottom of the separation device 10, and one end of the vacuum device 20 and the liquid discharge device 40 are connected to the separation device 10. The liquid level sensing device 30 is arranged at the top position in the separation device 10, and one end of the vacuum device 20 extends to the separation device 10 and is connected to the air channel 313 of the liquid level sensing device 30. Through the air channel 313, the vacuum device 20 is connected to the internal space of the separation device 10.

[0039] The small negative pressure machine in the present invention is assembled by a separation device 10, a vacuum device 20, a liquid level sensing device 30 and a liquid discharge device 40, wherein the separation device 10 is used to complete the filtration of gas and residues of the absorbed liquid, the vacuum device 20 is used to generate negative pressure inside the separation device 10 to smoothly perform the liquid absorption function, the liquid level sensing device 30 is used to sense the liquid capacity stored in the separation device 10, and the liquid discharge device 40 is used to output the liquid separated from the separation device 10. During assembly, the liquid level sensing device 30 is installed in the separation device 10 to sense the liquid capacity in the separation device 10. The vacuum device 20 and the liquid discharge device 40 are both installed at the bottom of the separation device 10, and The output end of the vacuum device 20 extends into the separation device 10 and is connected to the liquid level sensing device 30 located at the top of the separation device 10. At the same time, the vacuum device 20 is connected to the air duct 313 above the liquid level sensing device 30, thereby realizing the connection between the vacuum device 20 and the internal space of the separation device 10. The pressure inside the separation device 10 is changed by the vacuum device 20. The vacuum generator 22 provided in the vacuum device 20 is connected to the negative pressure machine, which can effectively reduce the power requirement of the negative pressure machine, so that the liquid can be smoothly absorbed by the separation device 10. The liquid in the separation device 10 is stored to a certain amount and is discharged through the liquid outlet device 40. Through the above-mentioned structural setting, accurate perception of the page height is achieved.

[0040] In another embodiment of the present invention, Figure 1 and Figures 3 to 6 As shown, the liquid level sensing device 30 includes a mounting seat 31, a sensing device 32 and a float 33. The sensing device 32 is a magnetically controlled switch, which controls the sensing device 32 by contacting the magnet provided on the top of the float 33. The mounting seat 31 is installed at the top position in the separation device 10, with sufficient height for the separation device 10 to store liquid, and the airway 313 is provided on the mounting seat 31. Both ends of the airway 313 pass through the bottom of the mounting seat 31, and one end is used to communicate with the vacuum device 20, indirectly realizing the connection between the vacuum device 20 and the internal space of the separation device 10. One end of the vacuum device 20 is connected to the mounting seat 31, and the float 33 is fixedly installed on the mounting seat 31. The float 33 is movably connected to the mounting seat 31 up and down, and the sensing device 32 is located above the float 33. The float 33 rises with the liquid level and realizes signal transmission after contacting the sensing device 32.

[0041] In another embodiment of the present invention, Figure 1 and Figures 4-6As shown, a first mounting hole 311 and a second mounting hole 312 are further provided on the mounting seat 31. The first mounting hole 311 and the second mounting hole 312 are respectively targeted for the installation of the vacuum device 20 and the float 33. One end of the vacuum device 20 is connected to one end of the first mounting hole 311, and one end of the float 33 is movably installed in the second mounting hole 312. One end of the air channel 313 is connected to the bottom of the mounting seat 31, and the other end of the air channel 313 is connected to the other end of the first mounting hole 311, so as to realize the connection between the vacuum device 20 and the air channel 313. The sensing device 32 is arranged across the other end of the second mounting hole 312 to facilitate contact with the upward-moving float 33. A mounting groove is also provided on the mounting seat 31. The mounting groove spans the top opening of the second mounting hole 312 for the installation of the sensing device 32, and the depth of the mounting groove is at least the same as the thickness of the sensing device 32, so as to ensure the flatness of the top plane of the mounting seat 31 and facilitate the assembly of the mounting seat 31.

[0042] In another embodiment of the present invention, Figure 1 and Figures 4-6 As shown, a plurality of limiting protrusions are arranged at intervals on the inner side wall of the second mounting hole 312 . Each limiting protrusion is arranged in a long strip shape, and each limiting protrusion is arranged close to the bottom opening of the second mounting hole 312 to limit the movable mounting end of the buoy 33 .

[0043] In another embodiment of the present invention, Figure 1 and Figures 3-4 As shown, the vacuum device 20 includes a connecting pipe 21, a vacuum generator 22 and a silencer 23. The vacuum generator 22 can effectively reduce the suction force required by the external device. The silencer 23 is fixedly installed at the bottom of the separation device 10. The silencer 23 is padded with sponge to assist in silencer to avoid abnormal noise caused by excessive air flow. One end of the connecting pipe 21 is connected to the mounting seat 31, and one end of the connecting pipe 21 is connected to the airway 313. One end of the vacuum generator 22 is arranged in the other end of the connecting pipe 21, and the other end of the connecting pipe 21 is connected to the silencer 23. A gasket is provided between the connecting pipe 21 and the silencer 23 to prevent gaps from appearing at the connection. The other end of the vacuum generator 22 is located in the vacuum generator 22 and is connected to the external pipeline and is wrapped with sponge.

[0044] In another embodiment of the present invention, Figure 1 、 Figures 3-4 and Figure 7As shown, the liquid discharge device 40 includes a support frame 41, a cover 42 and a connecting tube 43. The support frame 41 and the connecting tube 43 are both installed at the bottom of the separation device 10, and the connecting tube 43 is connected to the separation device 10. The support frame 41 is connected to the inner bottom surface of the separation device 10. The cover 42 is arranged in the support frame 41 and can move up and down. Two magnets of opposite poles are arranged between the support frame 41 and the cover 42 to keep the cover 42 abutting against the bottom of the opening of the support frame 41. The two magnets of opposite poles are respectively arranged on the support frame 41 and the cover 42. The repulsive force between the two magnets of opposite poles ensures that the cover 42 is tightly abutted against the opening where the support frame 41 and the inner bottom surface of the separation device 10 are clamped. When the pressure reaches a certain value, the cover 42 moves down to allow the liquid to flow out.

[0045] In another embodiment of the present invention, Figure 1 、 Figures 3-4 and Figure 7 As shown, the support frame 41 includes a mounting ring 411 and three U-shaped plates 412. The mounting ring 411 is installed in the separation device 10. One end of each U-shaped plate 412 is fixedly installed on the bottom of the mounting ring 411, and each U-shaped plate 412 is enclosed and spaced apart. The other end of each U-shaped plate 412 is connected and located under the cover 42, and is used to support one of the opposite-pole magnets to ensure that the cover 42 is suspended while leaving enough space for the discharged liquid to enter the connecting cylinder 43 and then be discharged.

[0046] In another embodiment of the present invention, Figures 1 to 4 As shown, the separation device 10 includes a separation cover 11, a filter device 12 and a separation tank 13. A connecting port is provided at the top of the sealing cover on the separation tank 13, and the connecting port can be extended upward or bent to the side. The sealing cover with different directions of the connecting port is selected and assembled with the separation tank 13 according to the assembly requirements. The filter device 12 filters and separates the residue in the liquid, and the separation cover 11 performs gas-water separation. The separation tank 13 is used to store the liquid after filtration and separation. The vacuum device 20 and the liquid outlet device 40 are both arranged at the bottom of the separation tank 13, and the liquid level sensing device 30 is arranged at the bottom of the separation cover 11. The separation cover 11 is installed at the top position in the separation tank 13, and the filter device 12 is arranged at the top of the separation cover 11, and the filter device 12 is connected to the input port of the separation tank 13. The liquid first enters the filter device 12 for residue filtration, and then flows through the separation cover 11 for gas-water separation and gas separation, and finally flows into the separation tank 13.

[0047] like Figure 1 and Figure 8 As shown, a bottom plate 131 is provided at the bottom of the separation tank 13, and the lines of the vacuum device 20, the liquid outlet device 40 and the sensing device 32 are all provided through the bottom plate 131, and sound insulation cotton is filled between the bottom plate 131 and the bottom of the separation tank 13 to achieve a better noise elimination effect.

[0048] In another embodiment of the present invention, Figures 1-2 and Figure 4 As shown, a number of inclined ridges 111 are arranged at intervals on the side of the separation cover 11, and each inclined ridge 111 abuts against the inner wall of the separation tank 13. A placement groove 112 is provided in the center of the upper surface of the separation cover 11, and the filtering device 12 is located in the placement groove 112. The liquid after filtering the residue overflows from the placement groove 112 and flows into the spiral grooves between the inclined ridges 111, and slowly flows downward. During the flow, the liquid adheres to the side wall of the separation cover 11, the gas is separated, and the adhered liquid gradually converges and flows into the separation tank 13.

[0049] In another embodiment of the present invention, Figure 1 and Figures 3-4 As shown, a wire outlet hole for external connection of the liquid level sensing device 30 is provided at the bottom of the separation device 10, guiding the line to extend from the bottom of the separation device 10 to the outside, ensuring the overall flatness of the outer surface of the separation device 10 tank body, making the outer surface of the separation device 10 tank body more concise.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A small negative pressure machine, characterized in that: It includes a separation device, a vacuum device, a liquid level sensing device and a liquid outlet device. The vacuum device and the liquid outlet device are both arranged at the bottom of the separation device, and one end of the vacuum device and the liquid outlet device are both connected to the separation device. The liquid level sensing device is arranged at the top position in the separation device, and one end of the vacuum device extends into the separation device to be connected to the airway of the liquid level sensing device.

2. The small negative pressure machine according to claim 1, characterized in that: The liquid level sensing device includes a mounting seat, a sensing device and a buoy. The mounting seat is installed at the top position inside the separation device, and the airway is arranged on the mounting seat. One end of the vacuum device is connected to the mounting seat, and the buoy is fixedly installed on the mounting seat. The buoy is movably connected to the mounting seat up and down, and the sensing device is located above the buoy.

3. The small negative pressure machine according to claim 2, characterized in that: The mounting seat is also provided with a first mounting hole and a second mounting hole, one end of the vacuum device is connected to one end of the first mounting hole, one end of the float is movably installed in the second mounting hole, one end of the air duct is connected to the bottom of the mounting seat, the other end of the air duct is connected to the other end of the first mounting hole, and the sensing device is arranged across the other end of the second mounting hole.

4. The small negative pressure machine according to claim 3, characterized in that: A plurality of limiting protrusions are arranged at intervals on the inner side wall of the second mounting hole, and each of the limiting protrusions is arranged close to the bottom opening of the second mounting hole.

5. The small negative pressure machine according to claim 2, characterized in that: The vacuum device includes a connecting pipe, a vacuum generator and a silencer, wherein the silencer is fixedly mounted on the bottom of the separation device, one end of the connecting pipe is connected to the mounting seat, and one end of the connecting pipe is communicated with the airway, one end of the vacuum generator is arranged in the other end of the connecting pipe, and the other end of the connecting pipe is communicated with the silencer, and the other end of the vacuum generator is located in the vacuum generator and communicated with an external pipeline.

6. The small negative pressure machine according to claim 1, characterized in that: The liquid outlet device includes a support frame, a sealing cover and a connecting tube, the support frame and the connecting tube are both installed at the bottom of the separation device, and the connecting tube is connected to the separation device, the support frame is connected to the inner bottom surface of the separation device, the sealing cover is arranged in the support frame, and two magnets of opposite poles are arranged between the support frame and the sealing cover to keep the sealing cover abutting against the bottom of the support frame opening, and the two magnets of opposite poles are respectively arranged on the support frame and the sealing cover.

7. The small negative pressure machine according to claim 6, characterized in that: The support frame includes a mounting ring and three U-shaped plates. The mounting ring is installed in the separation device. One end of each U-shaped plate is fixedly installed on the bottom of the mounting ring, and each U-shaped plate is enclosed and spaced apart. The other end of each U-shaped plate is connected and located under the cover to support one of the heteropolar magnets.

8. The small negative pressure machine according to claim 1, characterized in that: The separation device includes a separation cover, a filtering device and a separation tank. The vacuum device and the liquid outlet device are both arranged at the bottom of the separation tank. The liquid level sensing device is arranged at the bottom of the separation cover. The separation cover is installed at the top position in the separation tank. The filtering device is arranged at the top of the separation cover, and the filtering device is connected to the input port of the separation tank.

9. The small negative pressure machine according to claim 8, characterized in that: The side surface of the separation cover is provided with a plurality of inclined convex strips at intervals, and each of the inclined convex strips abuts against the inner wall of the separation tank. A placement groove is provided in the center of the upper surface of the separation cover, and the filter device is located in the placement groove.

10. The small negative pressure machine according to claim 1, characterized in that: The bottom of the separation device is provided with a wire outlet hole for external connection of the line of the liquid level sensing device.

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