KR102684538B1 - Wet vacuum pump - Google Patents

Abstract

Disclosed is a wet vacuum pump that can prevent overheating of the pump body by limiting the operation of the pump body when the water pressure flowing into the pump body is weak.
The wet vacuum pump is installed in the dental unit chair and is connected to the suction unit provided in the dental unit chair. When water is filled inside, the wet vacuum pump generates a vacuum and is coupled to the pump body and the pump body to provide suction force to the suction unit. It includes a pump operation module that flows externally supplied water into the pump body and controls the operation of the pump body. The pump operation module detects the water pressure of the water flowing into the inside, and the water pressure is within a preset critical range. Operate the pump body only when included.

Description

Wet vacuum pump

The present invention relates to a wet vacuum pump, and more specifically, to a wet vacuum pump that is installed in a dental unit chair and provides vacuum to suction equipment.

Typically, dental clinics are equipped with dental unit chairs where patients can lie down and lean on.

The dental unit chair is equipped with a suction tip to suction foreign substances in the patient's mouth during treatment.

At this time, a vacuum pump is disposed inside the dental unit chair, which is connected to the suction tip and generates suction force to provide a vacuum to the suction tip.

The vacuum pump is connected to a suction tip and consists of a pump body through which water flows in and out, an impeller placed inside the pump body and rotated, and a motor connected to the impeller to rotate the impeller.

Meanwhile, the above-mentioned vacuum pump has the characteristic that vacuum is generated only when water is filled between the pump body and the impeller.

At this time, the pump body is connected to the water pipe of the building and operates by receiving water through the water pipe.

However, the conventional vacuum pump does not have a separate control means to limit operation when the water pressure flowing into the building is low due to a water outage, etc., so when the water pressure is low, insufficient water is supplied into the pump. There was a problem that the product was overheated at a high temperature, causing the product to easily break down or shorten the lifespan of the product.

Registered Patent Publication No. 10-0665389

The present invention was created to solve the above problems, and the purpose of the present invention is to provide a wet vacuum that can prevent overheating of the pump body by limiting the operation of the pump body when the water pressure of the water flowing into the inside of the pump body is weak. Provides a pump.

The object of the present invention is not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

The wet vacuum pump according to an embodiment of the present invention to solve the above problem is installed in a dental unit chair, is connected to a suction unit provided in the dental unit chair, and generates a vacuum when water is filled inside. a pump body that provides suction force to the suction unit; and a pump operation module coupled to the pump body, allowing externally supplied water to flow into the pump body, and controlling the operation of the pump body, wherein the pump operation module detects the water pressure of water flowing into the pump body. And, the pump body is operated only when the water pressure is within a preset critical range.

The pump operation module is a solenoid valve that is coupled to the pump body and communicates with the pump body, and is configured to generate magnetic force when a current is applied to open a flow path in communication with the pump body to allow water to flow into the pump body. ; a trigger unit disposed inside the solenoid valve and configured to protrude to the outside of the solenoid valve or be housed inside the solenoid valve depending on the water pressure of water flowing into the solenoid valve; And it is coupled to the outer surface of the solenoid valve and is pressed to the trigger unit protruding outside of the solenoid valve to transmit an operation signal to the pump body, or the trigger unit protruding outside of the solenoid valve is pressed to activate the solenoid. A switch unit configured to transmit a stop signal to the pump body while housed inside the valve, wherein the trigger unit protrudes out of the solenoid valve only when the water pressure is within the critical range, and the trigger unit protrudes out of the solenoid valve only when the water pressure is within the critical range. may be 1 bar or more and 6 bar or less.

The solenoid valve includes a valve body in which the flow path is formed and a trigger detachment port on one side of which is connected to the flow path and to which the trigger unit is coupled is formed; a first port coupled to a portion of the valve body, communicating with the flow path, and receiving water from the outside to flow into the flow path; a second port coupled to another part of the valve body, communicating with the flow path, and coupled to the pump body to allow water flowing into the flow path to flow into the pump body; a filter member coupled to the valve body and filtering water flowing into the valve body through the first port; a valve cap coupled to the valve body and disposed on an upper end of the valve body; a coil disposed inside the valve cap and generating magnetic force when power is applied from the pump body; a spool disposed inside the coil and opening and closing the flow path; and an opening and closing auxiliary member that elastically supports the spool, wherein the trigger unit includes: a guide cap coupled to the trigger detachment port and having a guide hole formed in the inner center; A piston member, a portion of which is slidably disposed inside the trigger detachment port, and another portion of which passes through the guide hole and contacts the switch unit; And an airtight ring made of an elastic material coupled to the outer surface of the piston member, in contact with the inner surface of the trigger detachment port, and airtight between the outer surface of the piston member and the inner surface of the trigger detachment port, and pressurizing the piston member. When the water has a set water pressure, the piston member protrudes to the outside of the valve body and pressurizes the switch unit, and when the water pressing the piston member does not have a set water pressure, the piston member is pressed into the switch unit. It is stored inside the valve body, and the switch unit includes: a case having a predetermined space therein; a first terminal coupled to the case and electrically connected to the pump body, and transmitting the operation signal to the pump body when power is applied; a second terminal coupled to the case and electrically connected to the pump body, and transmitting the stop signal to the pump body when power is applied; a third terminal coupled to the case and receiving power from the outside; a movable plate rotatably coupled to the inside of the case and disposed in contact with the third terminal, and configured to apply power by rotating in contact with the first terminal or the second terminal; A part is disposed on the outside of the case and is in contact with the trigger unit, and the other part is disposed on the inside of the case and coupled to the movable plate, and when an external force is applied, the movable plate rotates and the first terminal or the second terminal a switch button that contacts; and a button elastic support member disposed inside the case and elastically supporting the switch button, wherein the switch button is stored inside the case and moves the movable plate when pressed by the trigger unit. The button is rotated toward the first terminal to contact the first terminal, and when the pressing force of the trigger unit is released, the button is pressed against the elastic support member and protrudes out of the case, and the movable plate is rotated toward the second terminal. 2 terminals can be contacted.

It further includes a bracket assembly coupled to the outer surface of the solenoid valve and supporting the switch unit, wherein the bracket assembly includes a boss inserted into a fastening hole formed in the case to support the case; and a fastening member fastened to the boss to support the case.

The bracket assembly further includes flow prevention devices disposed around the boss and elastically supporting an inner surface of the case forming the fastening hole to restrict movement of the switch unit, wherein the flow prevention devices are , a ball member accommodated in a storage groove formed on the outer surface of the boss, a portion of which protrudes outside the boss, and contacting the case to support the case; a ball cage rotatably coupled to the ball member therein, accommodated in the storage groove, and supported by hanging on an end of the storage groove; and a cage elastic support member accommodated in the storage groove and elastically supporting the ball cage. A flow prevention groove in which the ball member is seated may be formed on the inner surface of the case where the fastening hole is formed. .

The bracket assembly is configured to transport the switch unit to adjust a gap between the switch button and the piston member, and the bracket assembly includes: a fixing bracket coupled to and fixed to an outer surface of the valve body; a screw shaft rotatably coupled to the fixing bracket; A shaft drive motor coupled to the screw shaft to rotate the screw shaft; a transfer block coupled to the screw shaft and linearly moving along the outer surface of the screw shaft when the screw shaft is rotated; a guide shaft that is supported by being coupled to the fixing bracket and is coupled to enable the transfer block to slide; And it may include a moving bracket to which the switch unit is coupled and supported, and is transferred by the transfer block.

The switch unit is disposed opposite to the switch button along the axial direction of the button elastic support member and is in contact with an end of the button elastic support member, and adjusts a pressing force pressing the button elastic support member toward the switch button to press the button. It further includes an elastic force adjusting unit configured to adjust the elastic force of the elastic support member, wherein the elastic force adjusting portion includes a cylinder unit configured to expand and contract through the inflow and outflow of fluid. And a pressing force adjustment cap coupled to the end of the cylinder unit to support the end of the button elastic support member and moving in the axial direction of the button elastic support member by the cylinder unit to adjust the pressing force of the button elastic support member; may include.

According to an embodiment of the present invention, the pump operation module mounted on the pump body limits the operation of the pump body when the water pressure is weak, and operates the pump body when the water pressure is within the critical range, so that insufficient water is supplied. Overheating of the pump body is prevented by completely blocking the operation of the pump body. This prevents failure of the pump body due to overheating and increases the service life of the product.

The effects according to the present invention are not limited to the details exemplified above, and further various effects are included within the present invention.

Figure 1 is a diagram schematically showing a wet vacuum pump according to an embodiment of the present invention installed on a dental unit chair.
Figure 2 is a plan view showing a wet vacuum pump according to an embodiment of the present invention.
Figure 3 is a diagram schematically showing the operation process of the pump operation module according to an embodiment of the present invention.
Figure 4 is a side view schematically showing a pump operation module according to an embodiment of the present invention.
Figure 5 is a diagram schematically showing the operating process of a switch unit according to an embodiment of the present invention.
Figure 6 is a diagram schematically showing the coupling structure of the bracket assembly and the case according to an embodiment of the present invention.
Figure 7 is a diagram schematically showing a modified embodiment of a bracket assembly according to an embodiment of the present invention.
Figure 8 is a diagram schematically showing an elastic force adjusting unit according to an embodiment of the present invention.

Hereinafter, embodiments will be described in detail with reference to the attached drawings. However, various changes can be made to the embodiments, so the scope of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents, or substitutes for the embodiments are included in the scope of rights.

Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only and may be modified and implemented in various forms. Accordingly, the embodiments are not limited to the specific disclosed form, and the scope of the present specification includes changes, equivalents, or substitutes included in the technical spirit.

Terms such as first or second may be used to describe various components, but these terms should be interpreted only for the purpose of distinguishing one component from another component. For example, a first component may be named a second component, and similarly, the second component may also be named a first component.

When a component is referred to as being “connected” to another component, it should be understood that it may be directly connected or connected to the other component, but that other components may exist in between.

The terms used in the examples are for descriptive purposes only and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the embodiments belong. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted in an ideal or excessively formal sense unless explicitly defined in the present application. No.

In addition, when describing with reference to the accompanying drawings, identical components will be assigned the same reference numerals regardless of the reference numerals, and overlapping descriptions thereof will be omitted. In describing the embodiments, if it is determined that detailed descriptions of related known technologies may unnecessarily obscure the gist of the embodiments, the detailed descriptions are omitted.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. The present embodiments only serve to ensure that the disclosure of the present invention is complete and that common knowledge in the technical field to which the present invention pertains is not limited. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims.

In the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, are the same as those commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. It has meaning. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless clearly defined in the embodiments of the present invention, have an ideal or excessively formal meaning. It is not interpreted as

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are illustrative, and the present invention is not limited to the matters shown. Additionally, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. When 'includes', 'has', 'consists of', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. In cases where a component is expressed in the singular, the plural is included unless specifically stated otherwise.

When interpreting a component, it is interpreted to include the margin of error even if there is no separate explicit description.

In the case of a description of a positional relationship, for example, if the positional relationship of two parts is described as 'on top', 'on the top', 'on the bottom', 'next to', etc., 'immediately' Alternatively, there may be one or more other parts placed between the two parts, unless 'directly' is used.

When an element or layer is referred to as “on” another element or layer, it includes instances where the element or layer is directly on top of or intervening with another element. Like reference numerals refer to like elements throughout the specification.

The size and thickness of each component shown in the drawings are shown for convenience of explanation, and the present invention is not necessarily limited to the size and thickness of the components shown.

Each feature of the various embodiments of the present invention can be partially or fully combined or combined with each other, and as can be fully understood by those skilled in the art, various technical interconnections and operations are possible, and each embodiment may be implemented independently of each other. It may be possible to conduct them together due to a related relationship.

Figure 1 is a diagram schematically showing a wet vacuum pump according to an embodiment of the present invention installed on a dental unit chair, and Figure 2 is a plan view showing a wet vacuum pump according to an embodiment of the present invention.

Referring to Figures 1 and 2, a wet vacuum pump 1000 (hereinafter referred to as 'wet vacuum pump 1000') according to an embodiment of the present invention is installed in a dental unit chair (UC).

The wet vacuum pump 1000 includes a pump body (1) and a pump operation module (2).

The pump body 1 is connected to the suction unit (SU) provided in the dental unit chair (UC), and when water is filled inside, it generates a vacuum and provides suction force to the suction unit (SU).

For example, the pump body 1 is coupled to the front of the pump movable module 2, and the casing in which water passing through the pump movable module 2 is stored, is disposed on the upper part of the casing, and the pump movable module 2 A pump motor that is selectively operated by (2), an impeller disposed inside the casing and rotated by the pump motor, a suction port connected to the suction unit (SU), and disposed between the casing and the suction port and connected to the suction port. It is connected to the suction port, a vacuum control valve that provides a vacuum of the set pressure to the suction unit (SU), and is connected to the filtration unit and casing that filter foreign substances from the sewage sucked through the suction port. It may include a discharge port that discharges sewage to the outside.

The pump operation module (2) is coupled to the pump body (1) and flows externally supplied water into the pump body (1) and controls the operation of the pump body (1).

At this time, the pump operation module 2 detects the water pressure of the water flowing into the interior, and operates the pump body 1 only when the water pressure is within a preset critical range.

Figure 3 is a diagram schematically showing the operation process of the pump operation module according to an embodiment of the present invention, and Figure 4 is a side view schematically showing the pump operation module according to an embodiment of the present invention.

3 and 4, the pump operation module 2 may include a solenoid valve 21, a trigger unit 22, and a switch unit 23.

The solenoid valve 21 may be coupled to the pump body 1 and communicate with the pump body 1.

The solenoid valve 21 may be configured to generate magnetic force when a current is applied to open the flow path FP in communication with the pump body 1 to allow water to flow into the pump body 1.

The solenoid valve 21 includes a valve body 211, a first port 212, a second port 213, a filter member 214, a valve cap 215, a coil 216, a spool 217, and an opening/closing aid. It may include member 218.

The valve body 211 may have a flow path FP formed therein.

A trigger detachment port 211A to which the trigger unit 22 is coupled may be formed on one side of the valve body 211 in communication with the flow path FP.

The first port 212 is coupled to a portion of the valve body 211 and communicates with the flow path FP, and can receive water from the outside and allow it to flow into the flow path FP.

The second port 213 is coupled to another part of the valve body 211 and communicates with the flow path FP, and is coupled to the pump body 1 to allow water flowing into the flow path FP to flow into the pump body 1. You can do it.

The filter member 214 is coupled to the valve body 211 and can filter water flowing into the valve body 211 through the first port 212.

The valve cap 215 may be coupled to the valve body 211 and disposed on the upper end of the valve body 211.

The coil 216 is disposed inside the valve cap 215 and can generate magnetic force when power is applied from the pump body 1.

The spool 217 is disposed inside the coil 216, and can open and close the flow path FP through the magnetic field of the coil 216 and the elastic force of the opening and closing auxiliary member 218.

The opening and closing auxiliary member 218 can elastically support the spool 217. For example, the opening/closing auxiliary member 218 may be a coil spring.

The process by which the solenoid valve 21 opens and closes the flow path (FP) is as follows.

First, when power is applied to the coil 216, the coil 216 generates magnetic force to move the spool 217 closing the flow path FP. Through this, the spool 217 that was closing the flow path FP is separated from the valve body 211 and opens the flow path FP. For example, the spool 217 may include or be made of a metallic material that responds to magnetic force. Also, when power is applied, the coil 216 forms a magnetic field with a polarity opposite to that of the spool 217, thereby allowing the spool 217 to move.

At this time, the opening and closing auxiliary member 218 that elastically supports the spool 217 is placed in a compressed state by being pressed against the spool 217.

Next, when the power applied to the coil 216 is cut off, the magnetic force disappears and the force that separated the spool 217 from the valve body 211 is released. Through this, the opening and closing auxiliary member 218 that was pressed and compressed by the spool 217 is restored to its original state by elastic force, pressurizing the spool 217, and the spool 217 pressed by the opening and closing auxiliary member 218 is again The flow path (FP) is closed by contacting the valve body 211.

The trigger unit 22 is disposed inside the solenoid valve 21, and protrudes out of the solenoid valve 21 or is stored inside the solenoid valve 21, depending on the water pressure of the water flowing into the solenoid valve 21. It can be configured as follows.

At this time, the trigger unit 22 may protrude out of the solenoid valve 21 only when the water pressure is within the critical range.

The critical range of water pressure can be between 1 bar and 6 bar.

That is, the trigger unit 22 can flow and protrude to the outside of the solenoid valve 21 only when the water pressure of the water flowing into the inside of the solenoid valve 21 and pressurizing the trigger unit 22 is 1 bar or more and 6 bar or less.

Therefore, if the water pressure pressing the trigger unit 22 does not reach 1 bar, the trigger unit 22 does not flow.

For reference, in this embodiment, the maximum critical range of water pressure is defined as 6 bar, but even when the water pressure exceeds 6 bar, the trigger unit 22 may protrude outside the solenoid valve 21.

The trigger unit 22 may include a guide cap 221, a piston member 222, and an airtight ring 223.

The guide cap 221 may be coupled to the trigger detachment port (211A).

A portion of the piston member 222 may pass through the inner center of the guide cap 221, and a guide hole 221A may be formed to guide the movement of the piston member 222.

The piston member 222 may be accommodated inside the trigger detachment port 211A and protrude to the outside of the valve body 211, or may be accommodated inside the valve body 211.

More specifically, when the water pressing the piston member 222 has a set water pressure, the piston member 222 protrudes outward from the valve body 211 to press the switch unit 23, and presses the piston member 222. If the pressurized water does not have the set water pressure, the piston member 222 may be pressurized by the switch unit 23 and stored inside the valve body 211. Here, the set water pressure means the water pressure included within the critical range.

A portion of the piston member 222 is slidably disposed inside the trigger detachment port 211A, and the other portion of the piston member 222 may contact the switch unit 23 through the guide hole 221A. .

The airtight ring 223 is coupled to the outer surface of the piston member 222 and comes into contact with the inner surface of the trigger detachment port 211A, and can provide airtightness between the outer surface of the piston member 222 and the inner surface of the trigger detachment port 211A.

The airtight ring 223 may be made of an elastic material such as rubber.

The switch unit 23 may be coupled to the outer surface of the solenoid valve 21.

The switch unit 23 is pressed to the trigger unit 22 protruding out of the solenoid valve 21 to transmit an operation signal to the pump body 1, or the trigger unit 22 protruding out of the solenoid valve 21 ) can be configured to pressurize and store it inside the solenoid valve 21 while transmitting a stop signal to the pump body 1.

That is, when water with a water pressure within the critical range flows into the solenoid valve 21, the trigger unit 22 is pressurized by the water and protrudes out of the solenoid valve 21, and the switch unit 23 Pressure is applied to the trigger unit 22 protruding out of the solenoid valve 21. In addition, the switch unit 23 pressed by the trigger unit 22 generates an operation signal and transmits it to the pump body 1, and the pump body 1, which receives the operation signal from the switch unit 23, operates a solenoid valve ( While applying power to 21), the pump motor provided inside is operated. Then, the solenoid valve 21, which receives power from the pump body 1, generates magnetic force to open the internal flow path FP in communication with the pump body 1, allowing water to flow into the pump body 1.

At this time, when the water pressure of the water flowing into the solenoid valve 21 is lowered, the pressing force of the trigger unit 22 that was pressing the switch unit 23 is released, and this causes the switch unit 23 to use elastic force to The trigger unit (22) is pressed into the solenoid valve (21). Then, the switch unit 23 generates a stop signal and transmits it to the pump body 1, and the pump body 1, which receives the stop signal from the switch unit 23, blocks the power applied to the solenoid valve 21. While doing so, the pump motor provided inside is stopped. Then, the solenoid valve 21 whose power is cut off has its magnetic force released and is restored to its original state, thereby closing the internal flow path FP communicating with the pump body 1.

Figure 5 is a diagram schematically showing the operating process of a switch unit according to an embodiment of the present invention.

Referring to Figure 5, the switch unit 23 is a case 231 with a predetermined space formed inside, is coupled to the case 231 and is electrically connected to the pump body 1, and when power is applied, the pump body ( A first terminal 232 that transmits an operation signal to 1) is coupled to the case 231 and is electrically connected to the pump body 1, and a second terminal that transmits a stop signal to the pump body 1 when power is applied. It is coupled to the terminal 233 and the case 231 and may include a third terminal 234 to which power is applied from the outside.

Additionally, the switch unit 23 may further include a movable plate 235, a switch button 236, and a button elastic support member 237.

The movable plate 235 is rotatably coupled to the inside of the case 231 and placed in contact with the third terminal 234, and is rotated to contact the first terminal 232 or the second terminal 233. power can be applied to the third terminal 234. For example, the movable plate 235 may be rotatably disposed inside the case 231 through an axial member such as a hinge. Additionally, contact points may be provided on the movable plate 235.

A portion of the switch button 236 may be placed outside the case 231 and come into contact with the trigger unit 22, and another portion may be placed inside the case 231 and coupled to the movable plate 235.

The switch button 236 may be brought into contact with the first terminal 232 or the second terminal 233 while rotating the movable plate 235 when an external force is applied.

More specifically, when the switch button 236 is pressed by the trigger unit 22, it is stored inside the case 231 and rotates the movable plate 235 toward the first terminal 232 to contact the first terminal 232. When the pressing force of the trigger unit 22 is released, the button elastic support member 237 is pressed and protrudes out of the case 231, and the movable plate 235 is rotated toward the second terminal 233 to connect the second terminal ( 233).

The button elastic support member 237 is disposed inside the case 231 and can elastically support the switch button 236.

Referring to FIG. 3, the wet vacuum pump 1000 may further include a bracket assembly 3.

The bracket assembly 3 is coupled to the outer surface of the solenoid valve 21, and the switch unit 23 can be coupled and supported.

Figure 6 is a diagram schematically showing the coupling structure of the bracket assembly and the case according to an embodiment of the present invention.

Referring to FIG. 6, the bracket assembly 3 is inserted into the fastening hole 231A formed in the case 231 and fastened to the boss 31 supporting the case 231 and the boss 31 to secure the case 231. It may include a supporting fastening member 32. For example, the fastening member 32 may be implemented as a bolt with a thread formed on the outer peripheral surface, and a thread may be formed on the inner surface of the boss 31 so that the fastening member 32 can be screwed together.

The bracket assembly 3 may further include flow prevention devices 33.

The flow prevention devices 33 are disposed around the boss 31 and can restrict the movement of the switch unit 23 by elastically supporting the inner surface of the case 231 forming the fastening hole 231A.

The flow prevention device 33 is accommodated in the storage groove 311 formed on the outer surface of the boss 31, a portion of which protrudes out of the boss 31, and is a ball member that contacts the case 231 and supports the case 231. (331), the ball member 331 is rotatably coupled therein, accommodated in the storage groove 311, and accommodated in the ball cage 332 and the storage groove 311, which are supported by hanging on the end of the storage groove 311. It may include a cage elastic support member 333 that elastically supports the ball cage 332.

At this time, a flow prevention groove 231B in which the ball member 331 is seated may be formed on the inner surface of the case 231 where the fastening hole 231A is formed.

Figure 7 is a diagram schematically showing a modified embodiment of a bracket assembly according to an embodiment of the present invention.

Referring to Figure 7, the bracket assembly 3 may be configured to transport the switch unit 23 to adjust the gap between the switch button 236 and the piston member 222.

That is, if the switch button 236 and the piston member 222 are not in contact or over-contact due to the tolerance of each part, the gap between the switch button 236 and the piston member 222 is created through the bracket assembly 3. By correcting, the switch button 236 and the piston member 222 can be brought into accurate contact.

Specifically, the bracket assembly 3 includes a fixed bracket 34 coupled to and fixed to the outer surface of the valve body 211, a screw shaft 35 rotatably coupled to the fixed bracket 34, and a screw shaft 35. A shaft drive motor 36 that is coupled to rotate the screw shaft 35, and a transfer block 37 that is coupled to the screw shaft 35 and moves linearly along the outer surface of the screw shaft 35 when the screw shaft 35 is rotated. ), is supported by being coupled to the fixing bracket 34, and is supported by being coupled to a guide shaft 38 and a switch unit 23 to which the transfer block 37 is slidably coupled, and is transferred by the transfer block 37. It may include a moving bracket (39).

Figure 8 is a diagram schematically showing an elastic force adjusting unit according to an embodiment of the present invention.

Referring to FIG. 8, the switch unit 23 may further include an elastic force adjusting unit 238.

The elastic force adjusting unit 238 is disposed opposite to the switch button 236 along the axial direction of the button elastic support member 237 and may be in contact with an end of the button elastic support member 237.

The elastic force adjusting unit 238 may be configured to adjust the elastic force of the button elastic support member 237 by adjusting the pressing force that presses the button elastic support member 237 toward the switch button 236.

Accordingly, the force with which the switch button 236 is pressed can be adjusted depending on the level of water pressure, and through this, more precise control can be possible by allowing the switch button 236 to be pressed only at the set water pressure.

The elastic force adjusting unit 238 may include a cylinder unit 238A and a pressing force adjusting cap 238B.

The cylinder unit 238A supports the pressing force adjustment cap 238B, and can change the position of the pressing force adjustment cap 238B by expanding or contracting through the inflow and outflow of fluid.

The pressing force adjustment cap 238B is coupled to the end of the cylinder unit 238A to support the end of the button elastic support member 237, and is moved in the axial direction of the button elastic support member 237 by the cylinder unit 238A. The pressing force of the button elastic support member 237 can be adjusted.

According to an embodiment of the present invention, the pump operation module 2 mounted on the pump body 1 limits the operation of the pump body 1 when the water pressure is weak, and when the water pressure is within the critical range, the pump main body ( 1), it completely blocks the operation of the pump body (1) when insufficient water is supplied to prevent overheating of the pump body (1), thereby preventing failure of the pump body (1) due to overheating. And the service life of the product can be increased.

Although embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and various modifications may be made without departing from the technical spirit of the present invention. . Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

Therefore, other implementations, other embodiments, and equivalents of the claims also fall within the scope of the following claims.

1000. Wet vacuum pump
1. Pump body
2. Pump operation module
21. Solenoid valve
FP. Euro
211. Valve body
211A. Trigger detachment port
212. First port
213. Second port
214. Filter member
215. Valve cap
216. Coil
217. Spool
218. Opening and closing auxiliary members
22. Trigger unit
221. Guide cap
221A. guide hall
222. Piston member
223. Airtight ring
23. Switch unit
231. Case
231A. fastening hole
231B. Flow prevention groove
232. 1st terminal
233. Terminal 2
234. Terminal 3
235. Movable board
236. Switch button
237. Button elastic support member
238. Elasticity control unit
238A. cylinder unit
238B. Pressure force adjustment cap
3. Bracket assembly
31. Boss
311. Storage groove
32. Fastening members
33. Flow prevention device
331. Ball member
332. Ball cage
333. Cage elastic support member
34. Fixing bracket
35. Screw shaft
36. Shaft drive motor
37. Transfer block
38. Guide axis
39. Moving bracket
U.C. Dental Unit Chair
SU. Suction unit

Claims (3)

delete delete A wet vacuum pump installed in a dental unit chair,
A pump body connected to the suction unit provided in the dental unit chair, and generating a vacuum when water is filled therein to provide suction force to the suction unit; and
It includes a pump operation module that is coupled to the pump body, flows externally supplied water into the pump body, and controls the operation of the pump body,
The pump operation module detects the water pressure of water flowing into the interior and operates the pump body only when the water pressure is within a preset critical range,
The pump operation module is,
A solenoid valve coupled to the pump body and in communication with the pump body, and configured to generate magnetic force when a current is applied to open a passage communicating with the pump body to allow water to flow into the pump body;
a trigger unit disposed inside the solenoid valve and configured to protrude to the outside of the solenoid valve or be housed inside the solenoid valve depending on the water pressure of water flowing into the solenoid valve; and
It is coupled to the outer surface of the solenoid valve and is pressed to the trigger unit protruding outside of the solenoid valve to transmit an operation signal to the pump body, or the trigger unit protruding outside of the solenoid valve is pressed to activate the solenoid valve. A switch unit configured to transmit a stop signal to the pump body while being stored inside the
The trigger unit protrudes out of the solenoid valve only when the water pressure is within the critical range,
The critical range is 1 bar or more and 6 bar or less,
The solenoid valve is,
A valve body in which the flow path is formed and a trigger detachment port on one side of which is connected to the flow path and to which the trigger unit is coupled is formed;
a first port coupled to a portion of the valve body, communicating with the flow path, and receiving water from the outside to flow into the flow path;
a second port coupled to another part of the valve body, communicating with the flow path, and coupled to the pump body to allow water flowing into the flow path to flow into the pump body;
a filter member coupled to the valve body and filtering water flowing into the valve body through the first port;
a valve cap coupled to the valve body and disposed on an upper end of the valve body;
a coil disposed inside the valve cap and generating magnetic force when power is applied from the pump body;
a spool disposed inside the coil and opening and closing the flow path; and
It includes; an opening and closing auxiliary member that elastically supports the spool,
The trigger unit is,
A guide cap coupled to the trigger detachment port and having a guide hole formed in the inner center;
A piston member, a portion of which is slidably disposed inside the trigger detachment port, and another portion of which passes through the guide hole and contacts the switch unit; and
It is coupled to the outer surface of the piston member and contacts the inner surface of the trigger detachment port, and an airtight ring made of an elastic material that airtightens between the outer surface of the piston member and the inner surface of the trigger detachment port;
When the water pressing the piston member has a set water pressure, the piston member protrudes outward from the valve body to pressurize the switch unit,
If the water pressing the piston member does not have the set water pressure, the piston member is pressed by the switch unit and stored inside the valve body,
The switch unit is,
A case in which a predetermined space is formed inside;
a first terminal coupled to the case and electrically connected to the pump body, and transmitting the operation signal to the pump body when power is applied;
a second terminal coupled to the case and electrically connected to the pump body, and transmitting the stop signal to the pump body when power is applied;
a third terminal coupled to the case and receiving power from the outside;
a movable plate rotatably coupled to the inside of the case and disposed in contact with the third terminal, and configured to apply power by rotating in contact with the first terminal or the second terminal;
A part is disposed on the outside of the case and is in contact with the trigger unit, and the other part is disposed on the inside of the case and coupled to the movable plate, and when an external force is applied, the movable plate rotates and the first terminal or the second terminal a switch button that contacts; and
It includes a button elastic support member disposed inside the case and elastically supporting the switch button,
The switch button is,
When the trigger unit is pressed, the movable plate is stored inside the case and rotates toward the first terminal to contact the first terminal,
When the pressing force of the trigger unit is released, the button elastic support member is pressed and protrudes out of the case, and the movable plate is rotated toward the second terminal to contact the second terminal.

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