Small negative pressure machine

Abstract

A small negative pressure machine, comprising a separation device (10), a vacuum device (20), a liquid level sensing device (30), and a liquid outlet device (40), wherein the vacuum device (20) and the liquid outlet device (40) are both arranged at the bottom of the separation device (10); one end of the vacuum device (20) and one end of the liquid outlet device (40) are both communicated with the separation device (10); the liquid level sensing device (30) is arranged at the top position in the separation device (10); one end of the vacuum device (20) extends into the separation device (10) and is connected to air channels (313) of the liquid level sensing device (30). By means of the structural arrangement, the requirement on a negative pressure machine is reduced, and the liquid level sensing sensitivity is improved.

Description

Small negative pressure machine TECHNICAL FIELD

[0001] The present application belongs to the technical field of water-gas separation equipment, and particularly relates to a small negative pressure machine. BACKGROUND

[0002] In dental surgery, the saliva in the patient's mouth and the splashed water mist generated by the surgical tools need to be extracted. The saliva in the patient's mouth and the splashed water mist generated by the surgical tools are extracted by a gas-water separator in a medical device. The gas-water separator is a dehumidifying device for separating free water in air flow by using mechanical or kinetic energy. In the prior art, a negative pressure cyclone separation device is arranged in the gas-water separator to realize the centrifugal negative pressure separation effect of the air flow, so as to realize the separation function of the gas-water separator. However, when the negative pressure cyclone separation device in the prior art is used for separation, there are technical problems of control delay and low adjustment sensitivity.

[0003] SUMMARY

[0004] The present application aims to provide a small negative pressure machine, which aims to solve the technical problem of low control sensitivity of the small negative pressure machine in the prior art.

[0005] To achieve the above-mentioned purpose, the small negative pressure machine provided by the embodiments of the present application comprises 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 arranged at the bottom of the separation device, and one end of the vacuum device and the liquid outlet device is 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 the air duct of the liquid level sensing device.

[0006] Preferably, the liquid level sensing device comprises a mounting seat, a sensing device and a float. The mounting seat is arranged 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 with the mounting seat, and the float is fixedly arranged on the mounting seat. The float is movably connected with the mounting seat in the up-down direction, and the sensing device is arranged above the float.

[0007] Preferably, a first mounting hole and a second mounting hole are further arranged on the mounting seat. One end of the vacuum device is communicated with one end of the first mounting hole, one end of the float is movably arranged in the second mounting hole in the up-down direction, one end of the air duct is communicated with the bottom of the mounting seat, the other end of the air duct is communicated with the other end of the first mounting hole, and the sensing device is arranged across the other end of the second mounting hole.

[0008] Preferably, the inner side wall of the second mounting hole is provided with a plurality of limiting protrusions at intervals, and each of the limiting protrusions is arranged close to the bottom opening of the second mounting hole.

[0009] Preferably, the vacuum device comprises a connecting pipe, a vacuum generator and a silencer, the silencer is fixedly installed at the bottom of the separation device, one end of the connecting pipe is connected with the mounting seat, and the other end of the connecting pipe is in communication with the air passage, 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 in communication with the silencer, and the other end of the vacuum generator is in communication with an external pipeline in the vacuum generator.

[0010] Preferably, the liquid outlet device comprises a support frame, a cover and a connecting cylinder, the support frame and the connecting cylinder are both installed at the bottom of the separation device, and the connecting cylinder is in communication with the separation device, the support frame is connected with the inner bottom surface of the separation device, the cover is arranged in the support frame, and a return spring is arranged between the support frame and the cover to keep the cover abutting below the opening of the support frame.

[0011] Preferably, the support frame comprises a mounting ring and three U-shaped plates, the mounting ring is installed in the separation device, one end of each of the U-shaped plates is fixedly installed at the bottom of the mounting ring, and each of the U-shaped plates is arranged at intervals, and the other end of each of the U-shaped plates is connected below the cover to support the return spring.

[0012] Preferably, the separation device comprises a separation cover, a filter 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 of the separation tank, the filter device is arranged at the top of the separation cover, and the filter device is in communication with the input port of the separation tank.

[0013] Preferably, the side surface of the separation cover is provided with a plurality of inclined protrusions at intervals, and each of the inclined protrusions abuts on the inner side wall of the separation tank, the upper surface of the separation cover is provided with a placing groove in the center, and the filter device is located in the placing groove.

[0014] Preferably, the bottom of the separation device is provided with a wire outlet hole for external connection of the wire circuit of the liquid level sensing device.

[0015] The one or more technical solutions in the small negative pressure machine provided by the embodiment of the present application at least have one of the following technical effects:

[0016] The small negative pressure machine in the application is assembled by a separation device, a vacuum device, a liquid level sensing device and a liquid outlet device, wherein the separation device is used for filtering gas and dregs of the sucked liquid, the vacuum device is used for generating negative pressure in the separation device to smoothly perform liquid absorption function, the liquid level sensing device is used for sensing the liquid capacity stored in the separation device, and the liquid outlet device is used for outputting the separated liquid in the separation device. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0018] Fig. 1 is an exploded view of the small negative pressure machine provided by the embodiment of the present application.

[0019] Fig. 2 is a partial enlarged view of A in Fig. 1.

[0020] Fig. 3 is an effect view of the small negative pressure machine provided by the embodiment of the present application.

[0021] Fig. 4 is a sectional view of the small negative pressure machine provided by the embodiment of the present application.

[0022] Fig. 5 is a top view of the mounting seat of the small negative pressure machine provided by the embodiment of the present application.

[0023] Fig. 6 is a sectional view along the line B-B in Fig. 5.

[0024] Fig. 7 is an effect view of the supporting frame of the small negative pressure machine provided by the embodiment of the present application.

[0025] Fig. 8 is a disassembled relationship diagram of the separation tank and the bottom plate of the small negative pressure machine provided by the embodiment of the present application.

[0026] In the drawings, various reference signs are used:

[0027] 10 - separation device 11 - separation cover 12 - filtering device

[0028] 13 - separation tank 20 - vacuum device 21 - connecting pipe

[0029] 22 - vacuum generator 23 - silencing device 30 - liquid level sensing device

[0030] 31 - mounting seat 32 - sensing device 33 - float

[0031] 40 - liquid outlet device 41 - support frame 42 - cover

[0032] 43 - connecting cylinder 111 - inclined protrusion 112 - placing groove

[0033] 131 - bottom plate 311 - first mounting hole 312 - second mounting hole

[0034] 313 - air passage 411 - mounting ring 412 - U-shaped plate DETAILED DESCRIPTION

[0035] Embodiments of the present application are described below in detail, examples of which are shown in the accompanying drawings 1-8, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the embodiments of the present application, and cannot be understood as a limitation of the present application.

[0036] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0037] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0038] In the embodiments of this application, unless specifically defined and limited otherwise, the terms "mounting", "connection", "connecting", "fixed", and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0039] In one embodiment of the present application, as shown in FIGS. 1 and 3-4, a small negative pressure machine is provided, which comprises a separation device 10, a vacuum device 20, a liquid level sensing device 30 and a liquid outlet device 40. The separation device 10 is used for filtering and separating gas and dregs in the liquid. The vacuum device 20 is used for changing the pressure inside the separation device 10 to realize the suction function. The vacuum device 20 is used to reduce the suction demand of the connected equipment. The liquid level sensing device 30 accurately senses the change of the liquid level. The liquid outlet device 40 realizes the discharge of the liquid according to the change of the bottom pressure of the liquid inside the separation device 10. The vacuum device 20 and the liquid outlet device 40 are both arranged at the bottom of the separation device 10, and one end of the vacuum device 20 and the liquid outlet device 40 are both communicated with the separation device 10. The liquid level sensing device 30 is arranged at the top position in the separation device 10. One end of the vacuum device 20 extends into the separation device 10 and is connected with the air duct 313 of the liquid level sensing device 30. Through the air duct 313, the vacuum device 20 is connected with the internal space of the separation device 10.

[0040] The small negative pressure machine in the application is assembled by a separating device 10, a vacuum device 20, a liquid level sensing device 30 and a liquid outlet device 40, wherein the separating device 10 is used for filtering gas and dregs of the sucked liquid, the vacuum device 20 is used for generating negative pressure in the separating device 10 to smoothly perform the liquid absorption function, the liquid level sensing device 30 is used for sensing the liquid capacity stored in the separating device 10, and the liquid outlet device 40 is used for outputting the separated liquid in the separating device 10.

[0041] In another embodiment of the application, as shown in Figures 1 and 3-6, the liquid level sensing device 30 comprises a mounting seat 31, a sensing device 32 and a float 33, the sensing device 32 is a magnetic control switch, the control of the sensing device 32 is realized by contacting the magnet arranged on the top of the float 33, the mounting seat 31 is installed at the top position in the separating device 10 and has sufficient height for the separating device 10 to store liquid, the air duct 313 is arranged on the mounting seat 31, both ends of the air duct 313 penetrate through the bottom of the mounting seat 31, one end is used for communicating with the vacuum device 20 to indirectly realize the communication between the vacuum device 20 and the space inside the separating device 10, one end of the vacuum device 20 is connected with the mounting seat 31, the float 33 is fixedly installed on the mounting seat 31, the float 33 is movably connected with the mounting seat 31 in up and down directions, the sensing device 32 is located above the float 33, and the float 33 is in contact with the sensing device 32 after following the rising of the liquid level to realize signal transmission.

[0042] In another embodiment of the present application, as shown in FIG. 1 and FIG. 4-6, the mounting base 31 is further provided with a first mounting hole 311 and a second mounting hole 312, the first mounting hole 311 and the second mounting hole 312 are respectively provided for the installation of the vacuum device 20 and the float 33, one end of the vacuum device 20 is in communication with one end of the first mounting hole 311, one end of the float 33 is movably installed in the second mounting hole 312, the air duct 313 is communicated with the bottom of the mounting base 31, the other end of the air duct 313 is communicated with the other end of the first mounting hole 311, the communication between the vacuum device 20 and the air duct 313 is realized, the inductive device 32 is arranged across the other end of the second mounting hole 312, facilitating the contact of the float 33 moving upward, the mounting base 31 is further provided with a mounting groove, the mounting groove is arranged across the top opening of the second mounting hole 312, used for the installation of the inductive device 32, and the depth of the mounting groove is at least the same as the thickness of the inductive device 32, ensuring the flatness of the top plane of the mounting base 31, facilitating the assembly of the mounting base 31.

[0043] In another embodiment of the present application, as shown in FIG. 1 and FIG. 4-6, the inner side wall of the second mounting hole 312 is spaced apart and provided with a plurality of limiting protrusions, each limiting protrusion is arranged in a strip shape, and each limiting protrusion is arranged close to the bottom opening of the second mounting hole 312, limiting the movable installation end of the float 33.

[0044] In another embodiment of the present application, as shown in FIG. 1 and FIG. 3-4, 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 required suction force of the external device, the silencer 23 is fixedly installed at the bottom of the separation device 10, the sponge is arranged in the silencer 23 to assist in silencing, avoiding abnormal noise caused by excessive air flow, one end of the connecting pipe 21 is connected with the mounting base 31, and the other end of the connecting pipe 21 is communicated with the air duct 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 communicated with the silencer 23, a gasket is arranged between the connecting pipe 21 and the silencer 23 to prevent gaps at the connection, the other end of the vacuum generator 22 is located in the vacuum generator 22 and communicated with the external pipeline, and is wrapped by the sponge.

[0045] In another embodiment of the present application, as shown in FIG. 1, FIG. 3-4 and FIG. 7, the liquid outlet device 40 comprises a support frame 41, a cover 42 and a connecting cylinder 43, the support frame 41 and the connecting cylinder 43 are both installed on the bottom of the separation device 10, and the connecting cylinder 43 is in communication with the separation device 10, the support frame 41 is connected with 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, and two different grade magnets are arranged between the support frame 41 and the cover 42 to keep the cover 42 abutting against the opening of the support frame 41 below, the two different grade magnets are arranged on the support frame 41 and the cover 42 respectively, and the repulsion between the two different grade magnets ensures that the cover 42 is tightly abutted against the opening of the support frame 41 which is clamped with the inner bottom surface of the separation device 10, and when the pressure reaches a certain value, the cover 42 moves downward to make the liquid flow out.

[0046] In another embodiment of the present application, as shown in FIG. 1, FIG. 3-4 and FIG. 7, the support frame 41 comprises 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 the U-shaped plates 412 are arranged in a surrounding and spaced manner, the other end of each U-shaped plate 412 is connected below the cover 42 and used for supporting one of the different grade magnets, which ensures that the cover 42 is suspended while leaving enough space for the discharged liquid to enter the connecting cylinder 43 and then be discharged.

[0047] In another embodiment of the present application, as shown in FIG. 1-4, the separation device 10 comprises a separation cover 11, a filtering device 12 and a separation tank 13, a connecting port is arranged on the top of the sealing cover of the separation tank 13, the connecting port can be arranged extending upward or extending laterally and bending, the sealing cover with different orientations of the connecting port is assembled with the separation tank 13 according to assembly requirements, the filtering device 12 filters and separates the dregs in the liquid, the separation cover 11 performs gas-water separation, and the separation tank 13 is used for storing the liquid after filtering and separating, the vacuum device 20 and the liquid outlet device 40 are both arranged on the bottom of the separation tank 13, the liquid level sensing device 30 is arranged on the bottom of the separation cover 11, the separation cover 11 is installed on the top of the separation tank 13, the filtering device 12 is arranged on the top of the separation cover 11 and in communication with the input port of the separation tank 13, the liquid first enters the filtering device 12 to filter the dregs, then flows through the separation cover 11 to perform gas-water separation, separates the gas, and finally flows into the separation tank 13.

[0048] As shown in FIG. 1 and FIG. 8, a bottom plate 131 is arranged on the bottom of the separation tank 13, the vacuum device 20, the liquid outlet device 40 and the circuit of the sensing device 32 all pass through the bottom plate 131, and soundproof cotton is filled between the bottom plate 131 and the bottom of the separation tank 13 to achieve better noise elimination effect.

[0049] In another embodiment of the present application, as shown in Figs. 1-2 and 4, the side of the separation cover 11 is provided with a plurality of inclined ribs 111, and each of the inclined ribs 111 abuts against the inner side wall of the separation tank 13. The upper surface of the separation cover 11 is provided with a placement groove 112, and the filter device 12 is located in the placement groove 112. The liquid filtered by the filter device 12 overflows from the placement groove 112 and flows into the spiral groove between the inclined ribs 111, and slowly flows downward. In the process of flowing, the liquid adheres to the side wall of the separation cover 11, and the gas is separated. The adhered liquid gradually converges and flows into the separation tank 13.

[0050] In another embodiment of the present application, as shown in Figs. 1 and 3-4, the bottom of the separation device 10 is provided with a wire outlet hole for externally connecting the liquid level sensing device 30 circuit. The guide circuit extends from the bottom of the separation device 10 to the outside, and ensures the flatness of the whole outer surface of the tank body of the separation device 10, so that the outer surface of the tank body of the separation device 10 is more simple.

[0051] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A small-sized negative pressure machine characterized by: The liquid surface sensing device comprises a mounting seat, a sensing device and a float, the mounting seat is mounted at the top position in the separation device, and the air passage is arranged on the mounting seat, one end of the vacuum device is connected with the mounting seat, the float is fixedly mounted on the mounting seat, the float is movably connected with the mounting seat in the up-down direction, and the sensing device is located above the float.

2. The compact negative pressure machine of claim 1, wherein: The mounting seat is also provided with a first mounting hole and a second mounting hole, one end of the vacuum device is in communication with one end of the first mounting hole, one end of the float is movably mounted in the second mounting hole in the up-down direction, one end of the air passage is in communication with the bottom of the mounting seat, the other end of the air passage is in communication with the other end of the first mounting hole, and the sensing device is arranged across the other end of the second mounting hole.

3. The compact negative pressure machine of claim 2, wherein: The inner side wall of the second mounting hole is provided with a plurality of limiting protrusions, and each limiting protrusion is arranged close to the bottom opening of the second mounting hole.

4. The compact negative pressure machine of claim 3, wherein: The vacuum device comprises a connecting pipe, a vacuum generator and a silencer, the silencer is fixedly mounted at the bottom of the separation device, one end of the connecting pipe is connected with the mounting seat, and the other end of the connecting pipe is in communication with the air passage, 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 in communication with the silencer, and the other end of the vacuum generator is in communication with the external pipeline in the vacuum generator.

5. The compact negative pressure machine of claim 2, wherein: The liquid outlet device comprises a support frame, a cover and a connecting cylinder, the support frame and the connecting cylinder are mounted at the bottom of the separation device, the connecting cylinder is in communication with the separation device, the support frame is connected with the inner bottom surface of the separation device, the cover is arranged in the support frame, and two heteropolar magnets are arranged between the support frame and the cover to keep the cover abutting against the opening below the support frame.

6. The compact negative pressure machine of claim 1, wherein: The support frame comprises a mounting ring and three U-shaped plates, one end of each U-shaped plate is fixedly mounted at the bottom of the mounting ring, and each U-shaped plate is arranged in a surrounding and spaced manner, and the other end of each U-shaped plate is connected below the cover for supporting one of the heteropolar magnets.

7. The compact negative pressure machine of claim 6, wherein: The separation device comprises a separation cover, a filter device and a separation tank, the vacuum device and the liquid outlet device are arranged at the bottom of the separation tank, the liquid surface sensing device is arranged at the bottom of the separation cover, the separation cover is mounted at the top position in the separation tank, the filter device is arranged at the top of the separation cover, and the filter device is in communication with the input port of the separation tank.

8. The compact negative pressure machine of claim 1, wherein: ​ 9. The compact negative pressure machine of claim 8, wherein: The side surface of the separation cover is provided with a plurality of inclined protrusions which are arranged at intervals and abut against the inner side wall of the separation tank, and the upper surface of the separation cover is provided with a placing groove in which the filter device is located.

10. The compact negative pressure machine of claim 1, wherein: The bottom of the separation device is provided with a wire outlet hole for externally connecting the wire of the liquid level sensing device.

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