CN218187214U - Water supply installation and dental chair equipment - Google Patents

Abstract

The application is suitable for dental equipment technical field, provides a water supply installation and dental chair equipment, including liquid storage shell, isolation diaphragm and first pressurization structure. The liquid storage shell is provided with a liquid storage cavity, a liquid storage inlet end and a liquid storage outlet end; the isolation diaphragm is arranged in the liquid storage cavity, the isolation diaphragm divides the liquid storage cavity into a first cavity and a second cavity, and the liquid storage inlet end and the liquid storage outlet end are both communicated with the second cavity; the first pressurizing structure is in communication with the first chamber, the first pressurizing structure for delivering pressurized medium to the first chamber. When the water supply device is used, on one hand, the contact area between the isolation diaphragm and the liquid in the second chamber is relatively large, so that the liquid output is more stable; on the other hand, the isolation diaphragm separates the first chamber from the second chamber to prevent the pressurized medium input into the first chamber by the first pressurizing structure from contacting the liquid in the second chamber, thereby preventing the liquid in the second chamber from being polluted.

Description

Water supply installation and dental chair equipment

Technical Field

The application relates to the technical field of dental equipment, in particular to a water supply device and dental chair equipment.

Background

The dental chair is necessary equipment for treating patients by stomatologists, the use rate is high, and water is one of three essential elements essential to the dental chair.

At present, the water supply device on the market generally comprises an air pump and a water storage tank, wherein the water storage tank is communicated with each water using pipeline of the dental chair, and the air pump is used for inflating the water storage tank so as to increase the pressure in the water storage tank, so that water in the water storage tank enters each water using pipeline of the dental chair to be used by the dental chair.

However, the water in the water storage tank is stirred by strong airflow entering the water storage tank through a pressurizing mode of inflating the water storage tank by the air pump, so that output water flow is not stable.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a water supply installation, aim at solving among the prior art water supply installation when supplying water liquid output is not steady enough and the water source easily contaminated technical problem.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: there is provided a water supply device including:

the liquid storage shell is provided with a liquid storage cavity, a liquid storage inlet end and a liquid storage outlet end;

the isolation diaphragm is arranged in the liquid storage cavity, the isolation diaphragm divides the liquid storage cavity into a first cavity and a second cavity, and the liquid inlet end and the liquid outlet end of the liquid storage are both communicated with the second cavity;

a first pressurizing structure in communication with the first chamber, the first pressurizing structure for delivering a pressurizing medium to the first chamber.

In one possible design, the liquid storage case includes a first case body and a first case cover, the first case body and the first case cover are detachably connected, the isolation diaphragm is located between the first case body and the first case cover, the first case cover and the isolation diaphragm form the first chamber therebetween, and the first case body and the isolation diaphragm form the second chamber therebetween.

In a possible design, the first housing has a first inner cavity and a first opening, the first opening is communicated with the first inner cavity, the first housing cover is provided with a boss, the first housing cover covers the first opening, and the boss is located in the first inner cavity.

In one possible design, the first housing includes a mounting platform located in the first interior cavity and protruding from an interior sidewall of the first housing, the boss capturing the peripheral edge of the isolation diaphragm between the boss and the mounting platform.

In one possible design, the boss includes a first protrusion, the edge of the isolation diaphragm is provided with a groove, and the first protrusion extends into the groove to clamp the isolation diaphragm between the first protrusion and the mounting platform, and clamp the isolation diaphragm between the inner side wall of the first housing and the first protrusion.

In a possible design, the water supply device further includes a control system, the first pressurizing structure includes a first pressurizing solenoid valve and a pressurizing pipeline, the pressurizing pipeline is connected with the first pressurizing solenoid valve, the pressurizing pipeline is communicated with the first chamber, the first pressurizing solenoid valve is in signal connection with the control system, the pressurizing pipeline is used for allowing the pressurizing medium to enter the first chamber, and the control system is used for controlling the opening and closing state of the first pressurizing solenoid valve so as to control the opening and closing state of the pressurizing pipeline.

In a possible design, the stock solution inlet end is provided with a first control switch, and the first control switch is used for controlling the opening and closing state of the stock solution inlet end.

In a possible design, the water supply device further comprises a liquid mixing shell, the liquid mixing shell is provided with a liquid mixing cavity and a liquid mixing outlet end, the liquid mixing outlet end is communicated with the liquid mixing cavity, and the liquid mixing outlet end is communicated with the liquid storage inlet end, so that the liquid mixing cavity is communicated with the second cavity;

the water supply installation still includes second pressurization structure, second pressurization structure with mix the sap cavity intercommunication, second pressurization structure be used for to mix the sap cavity pressurization, so that the liquid in mixing the sap cavity passes through stock solution inlet end and gets into the second cavity.

In a possible design, the water supply device further includes a control system, the liquid storage shell is connected with a pressure detector, the pressure detector is communicated with the second chamber, the pressure detector is used for detecting the pressure in the second chamber, the pressure detector is in signal connection with the control system, and the control system controls the opening and closing states of the first pressurizing structure and the second pressurizing structure according to the pressure value fed back by the pressure detector.

The application also provides a dental chair device, which comprises the water supply device according to any one of the technical schemes.

The application provides a water supply installation and dental chair equipment's beneficial effect lies in:

compared with the prior art, the water supply installation of this application is through setting up the isolation diaphragm in the stock solution intracavity for the isolation diaphragm separates the stock solution chamber for first cavity and second cavity, and the first pressurization structure of rethread pressurizes to first cavity, so that the isolation diaphragm deformation and to the second cavity protrusion, thereby makes the volume of second cavity diminish, makes the pressure grow in the second cavity, thereby passes through the liquid end discharge of stock solution with the liquid in the second cavity. On the one hand, because the isolation diaphragm protrudes towards the second chamber to pressurize the second chamber, the contact area between the isolation diaphragm and the liquid in the second chamber is relatively large, so that the liquid output is more stable. On the other hand, the isolation diaphragm is arranged to separate the first chamber from the second chamber so as to prevent the pressurized medium (pressurized gas or pressurized liquid) input into the first chamber by the first pressurizing structure from contacting with the liquid in the second chamber, thereby reducing or even avoiding the liquid in the second chamber from being polluted. From the above, the water supply device provided by the application can enable the liquid output to be more stable, and can prevent the liquid in the second chamber from being polluted.

The utility model provides a dental chair equipment includes the water supply installation that this application provided, consequently possesses the beneficial effect that above-mentioned water supply installation possessed at least, and the no longer repeated description here.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic diagram of a water supply apparatus provided in an embodiment of the present application in a state in which a second chamber pressure is increased;

fig. 2 is a schematic view illustrating a state in which the external liquid of the water supply device according to an embodiment of the present application is injected into the second chamber;

FIG. 3 is a schematic view of a connection of a check valve and a connection of a water supply device provided by an embodiment of the present application;

FIG. 4 is an overall cross-sectional schematic view of a water supply apparatus provided by an embodiment of the present application;

fig. 5 is a schematic view of the overall structure of a water supply device provided in an embodiment of the present application.

Reference is now made to the following figures, in which:

110. a first housing; 120. a first housing cover; 130. an isolation diaphragm; 140. a first chamber; 150. a second chamber; 151. a pressure detector; 160. a liquid inlet end of the liquid storage; 161. a first control switch; 1611. a cylinder body; 1612. a baffle plate; 1613. a spring; 1614. a liquid inlet hole; 1615. a liquid outlet hole; 1616. a screw; 1617. a limiting plate; 170. a liquid outlet end of the liquid storage; 182. a first pressurizing solenoid valve; 310. a second housing; 320. a second housing cover; 330. a liquid mixing cavity; 331. a liquid level sensor; 340. a liquid inlet end of the mixed liquid; 341. a second control switch; 350. discharging the mixed liquid to a liquid outlet end; 361. a second pressurizing solenoid valve; 400. a silencing box; 410. a sound deadening duct.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the application and to simplify the description, and are not intended to indicate or imply that the structure or element being referred to must have a particular orientation, be constructed in a particular orientation, and be constructed in operation as a limitation of the application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In order to explain the technical solutions of the present application, the following detailed descriptions are made with reference to specific drawings and examples.

Note that, in fig. 1, an arrow in the first chamber 140 indicates a pressing direction of the pressurized medium against the isolation diaphragm 130, and an arrow in the liquid storage end 170 indicates a liquid flow direction; in FIG. 2, the arrows in the mixing fluid outlet end 350, the storage fluid inlet end 160, and the storage fluid outlet end 170 indicate the fluid flow direction; in fig. 4, the arrows in the first chamber 140 indicate the pressing direction of the pressurized medium to the isolation diaphragm 130, and the arrows in the mixing liquid outlet end 350, the liquid storage liquid inlet end 160 and the liquid storage liquid outlet end 170 indicate the liquid flowing direction; solid arrows in fig. 5 indicate a flow direction when the external liquid is ready to enter the liquid mixing chamber 330, and dotted arrows indicate a flow direction when the pressurizing medium enters the sound-deadening box 400 when the first pressurizing structure and/or the second pressurizing structure operates.

As shown in fig. 1, one embodiment of the present application provides a water supply apparatus including a liquid storage case, an isolation diaphragm 130, and a first pressurizing structure. The liquid storage shell is provided with a liquid storage cavity, a liquid storage inlet end 160 and a liquid storage outlet end 170; the isolation diaphragm 130 is arranged in the liquid storage cavity, the isolation diaphragm 130 divides the liquid storage cavity into a first cavity 140 and a second cavity 150, and the liquid storage inlet end 160 and the liquid storage outlet end 170 are both communicated with the second cavity 150; a first pressurizing structure is in communication with the first chamber 140 for delivering pressurized medium to the first chamber 140.

The water supply device provided by the embodiment comprises an isolation diaphragm 130 arranged in a liquid storage cavity, the isolation diaphragm 130 divides the liquid storage cavity into a first cavity 140 and a second cavity 150, the first pressurization structure pressurizes the first cavity 140, the isolation diaphragm 130 deforms and protrudes towards the second cavity 150, the size of the first cavity 140 is increased, the size of the second cavity 150 is decreased, the pressure in the second cavity 150 is increased, and liquid in the second cavity 150 is discharged from a liquid storage end 170. On one hand, since the second chamber 150 is pressurized by the isolation diaphragm 130 protruding toward the second chamber 150, a contact area of the isolation diaphragm 130 with the liquid in the second chamber 150 is relatively large, thereby making the liquid output more stable. On the other hand, the isolation diaphragm 130 is provided to separate the first chamber 140 from the second chamber 150, so as to prevent the pressurized medium (pressurized gas or pressurized liquid) input into the first chamber 140 by the first pressurizing structure from contacting the liquid in the second chamber 150, thereby preventing the liquid in the second chamber 150 from being contaminated. As can be seen from the above, the present embodiment provides a water supply device that can both make the liquid output more stable and prevent the liquid in the second chamber 150 from being contaminated.

In one possible design, the liquid storage case includes a first case 110 and a first case cover 120, the first case 110 and the first case cover 120 are detachably connected, an isolation diaphragm 130 is located between the first case 110 and the first case cover 120, a first chamber 140 is formed between the first case cover 120 and the isolation diaphragm 130, and a second chamber 150 is formed between the first case 110 and the isolation diaphragm 130. Through dividing the stock solution shell into first casing 110 and the first cap 120 of can dismantling the connection, be convenient for install isolation diaphragm 130 in the stock solution intracavity of stock solution shell, improved the convenient degree of water supply installation assembly. The first housing 110 and the first housing cover 120 may be connected by screws, snaps, or the like, or may be connected by threads.

In one embodiment, as shown in fig. 2, when the first pressurizing structure does not pressurize the first chamber 140, one side of the isolation diaphragm 130 may be attached to the sidewall of the first housing cover 120, that is, the volume of the first chamber 140 is zero, when the first pressurizing structure pressurizes the first chamber 140, a part of the material of the isolation diaphragm 130 is separated from the sidewall of the first housing cover 120 and moves toward the second chamber 150, the volume of the first chamber 140 becomes larger, the volume of the second chamber 150 becomes smaller, and the pressure of the second chamber 150 becomes larger, so that the liquid in the second chamber 150 is discharged through the liquid outlet 170. The isolation diaphragm 130 is attached to the sidewall of the first housing cover 120, so that the volume of the second chamber 150 is relatively large under the condition that the volume of the liquid storage chamber is not changed, and more liquid can be stored in the second chamber 150.

In one possible design, as shown in fig. 1, the first housing 110 has a first inner cavity and a first opening, the first opening is communicated with the first inner cavity, the first housing cover 120 is provided with a boss, the first housing cover 120 covers the first opening, and the boss is located in the first inner cavity. The first housing cover 120 covers the first opening of the first housing 110, so that a liquid storage cavity is formed between the first housing cover 120 and the first housing 110. Set up the boss on the first cap 120, through stretching into first inner chamber with the boss, make first cap 120 radially spacing for first casing 110 on the one hand, on the other hand can also make things convenient for first casing 110 and first cap 120 better counterpoint when assembling.

In one particular embodiment, isolation diaphragm 130 is made of a flexible material. The liquid inlet 160 is used for allowing external liquid to be injected into the second chamber 150, and after the external liquid is injected into the second chamber 150, the liquid in the second chamber 150 increases, so that the pressure of the second chamber 150 increases, and the isolation diaphragm 130 deforms and protrudes from the first chamber 140. Then, the first pressurizing structure pressurizes the first chamber 140, so that the isolation diaphragm 130 is deformed and protrudes toward the second chamber 150, so that the volume of the second chamber 150 is reduced, the strong pressure of the second chamber 150 is increased, and the liquid in the second chamber 150 is discharged through the liquid storage end 170.

In another embodiment, the isolation diaphragm 130 may be made of an elastic material, such as a rubber material, a plastic material, or the like. When the first pressurizing structure pressurizes the first chamber 140, the isolating diaphragm 130 is deformed and protrudes toward the second chamber 150, so that the liquid in the second chamber 150 is discharged through the liquid outlet end 170. The isolation diaphragm 130 may recover its shape by itself when the first pressurizing structure stops pressurizing the first chamber 140.

In an alternative embodiment, as shown in FIG. 1, the isolation diaphragm 130 is located at the junction of the first housing cover 120 and the first housing 110. During assembly, the isolation diaphragm 130 is laid outside the first opening of the first housing 110 such that the isolation diaphragm 130 covers the first opening, and then the first housing cover 120 is covered outside the isolation diaphragm 130 to press the peripheral edge of the isolation diaphragm 130 against the first housing 110 by the first housing cover 120 such that the isolation diaphragm 130 covers the first opening.

In one possible design, the first housing 110 includes a mounting platform located in the first interior cavity and protruding from the inner sidewall of the first housing 110, the boss capturing the outer peripheral edge of the isolation diaphragm 130 between the boss and the mounting platform. Through set up mounting platform in first casing 110, on the one hand make when connecting first shell cover 120 and first casing 110, can hold isolation diaphragm 130 card between boss and mounting platform, on the other hand makes first shell cover 120 spacing for first casing 110 axial, and the assembly of being convenient for has improved installation effectiveness.

In one embodiment, the surface of the portion of the boss protruding out of the sidewall of the first housing 110 is circular, and the boss surrounds the edge of the sidewall of the first housing cover 120. The surface of the mounting platform is in a liquid level ring shape, and the mounting platform is distributed around the circumference of the axis of the first inner cavity. In the assembling process, the isolation diaphragm 130 is laid outside the first opening of the first housing 110, the boss is inserted into the first inner cavity from the outside of the first opening, the boss drives the peripheral edge of the isolation diaphragm 130 to extend into the first inner cavity until the peripheral edge of the isolation diaphragm 130 is clamped between the boss and the mounting platform, so that the first housing cover 120 is limited relative to the first housing 110, and meanwhile, the isolation diaphragm 130 is limited relative to the first housing cover 120 and the first housing 110.

In one possible design, the boss includes a first protrusion, the edge of the isolation diaphragm 130 is provided with a groove, and the first protrusion extends into the groove to clamp the isolation diaphragm 130 between the first protrusion and the mounting platform, and clamp the isolation diaphragm 130 between the inner sidewall of the first housing 110 and the first protrusion. Through the cooperation of the first protruding portion and the groove, the isolation diaphragm 130 can be clamped between the first protruding portion and the mounting platform, and simultaneously, the isolation diaphragm 130 can be clamped between the first protruding portion and the inner side wall of the first housing 110, so that on one hand, the mounting firmness of the isolation diaphragm 130 is improved, and on the other hand, the sealing performance between the first housing 110 and the first housing cover 120 is improved.

In a specific embodiment, the boss further includes a second protrusion disposed at a side of the first housing cover 120, and the first protrusion is disposed at a side of the second protrusion away from the first housing cover 120. The surface of the second protrusion protruding the first housing cover 120 is circular, the surface of the first protrusion protruding the second protrusion is circular, and the outer diameter of the first protrusion is smaller than the outer diameter of the second protrusion. During assembly, the isolation diaphragm 130 is laid outside the first opening of the first housing 110, and the first protrusion extends into the groove and pushes the isolation diaphragm 130 to move toward the first inner cavity until the isolation diaphragm 130 contacts the mounting platform, so that the first housing cover 120 is limited relative to the first housing 110, and the isolation diaphragm 130 is limited relative to the first housing 110 and the first housing cover 120.

In another specific embodiment, after the isolation diaphragm 130 contacts the mounting platform, the first housing cover 120 may further move a certain distance toward the first housing 110, so that the first protrusion presses the isolation diaphragm 130 against the mounting platform, and the peripheral edge of the isolation diaphragm 130 presses against the inner side wall of the first housing 110, and the peripheral edge of the isolation diaphragm 130 is pressed by the outer side wall of the first protrusion and the inner side wall of the first housing 110 to deform, so that the peripheral edge of the isolation diaphragm 130 seals a gap between the outer side wall of the first protrusion and the inner side wall of the first housing 110, thereby further improving the sealing performance between the first housing 110 and the first housing cover 120. After the isolation diaphragm 130 is pressed against the mounting platform by the first protrusion, the first housing cover 120 and the first housing 110 are screwed by screws, so that the first housing 110 and the first housing cover 120 are fixed, and the isolation diaphragm 130 is fixed between the first housing 110 and the first housing cover 120. The chamber formed between the first housing cover 120 and the isolation diaphragm 130 is a first chamber 140, and the chamber formed between the isolation diaphragm 130 and the first housing 110 is a second chamber 150.

In another embodiment, the isolation diaphragm 130 may be fixedly coupled to only the first housing cover 120 or the first housing 110. For example, the peripheral edge of the isolation diaphragm 130 may be fixedly connected to a sidewall of the first housing cover 120 close to the first housing 110 by gluing, and when the first housing cover 120 covers the first opening, the isolation diaphragm 130 covers the first opening; or the peripheral edge of the isolation diaphragm 130 is fixedly connected with the inner wall of the first opening by means of gluing so that the isolation diaphragm 130 covers the first opening.

In a possible embodiment, the water supply device further comprises a first sealing ring, which is located between the first housing 110 and the first housing cover 120, and specifically, the first sealing ring can be mounted on the first housing 110 and also can be mounted on the first housing cover 120. Illustratively, a first sealing ring is disposed on a side of the first housing 110 close to the first housing cover 120, and when the first housing 110 is fixedly connected to the first housing cover 120, the first sealing ring is located between the first housing 110 and the first housing cover 120, and the first sealing ring is in close contact with the first housing 110 and the first housing cover 120, respectively, so as to improve the sealing performance of the reservoir.

The liquid inlet end 160 and the liquid outlet end 170 are both located on the side wall of the first casing 110, and the second cavity 150 is communicated with the outside through the liquid inlet end 160 and the liquid outlet end 170. The liquid inlet end 160 is used for liquid to enter the second chamber 150, and the liquid outlet end 170 is used for communicating with the external water end, so that the liquid in the second chamber 150 is output to the external water end, and the second chamber 150 can be normally fed with liquid. When the water supply device is applied to the dental chair equipment, the external water end is the working end of the dental chair equipment, and the liquid storage and outlet end 170 is communicated with the working end of the dental chair, so that liquid in the second chamber 150 can enter the working end of the dental chair through the liquid storage and outlet end 170 to be used by the dental chair.

In a possible design, the water supply device further includes a control system, the first pressurizing structure includes a first pressurizing solenoid valve 182 and a pressurizing pipeline, the pressurizing pipeline is connected with the first pressurizing solenoid valve 182, the pressurizing pipeline is communicated with the first chamber 140, the first pressurizing solenoid valve 182 is in signal connection with the control system, the pressurizing pipeline is used for supplying a pressurizing medium into the first chamber 140, and the control system is used for controlling the opening and closing state of the first pressurizing solenoid valve 182 so as to control the opening and closing state of the pressurizing pipeline. The open and close state of the first pressurizing solenoid valve 182 is controlled by the control system to control the pressurizing state of the first chamber 140, thereby controlling the discharge state of the liquid in the second chamber 150.

In one embodiment, the first housing cover 120 is provided with a through hole, and the pressure lines include a first pressure line and a liquid storage pressure line. One end of the liquid storage and pressurization pipeline extends into the through hole and is communicated with the first chamber 140, and the other end of the liquid storage and pressurization pipeline is connected with the first pressurization solenoid valve 182. One end of the first pressurizing pipeline is connected with a pressure conveying device, and the other end of the first pressurizing pipeline is connected with a first pressurizing electromagnetic valve 182. The first pressurizing solenoid valve 182 is used for controlling the communication state of the first pressurizing pipeline and the liquid storage pressurizing pipeline, when the first pressurizing solenoid valve 182 is opened, the first pressurizing pipeline is communicated with the liquid storage pressurizing pipeline, and when the first pressurizing solenoid valve 182 is closed, the first pressurizing pipeline is disconnected from the liquid storage pressurizing pipeline. The pressure delivery device is used for delivering a pressurized medium (pressurized gas or pressurized liquid) into the first pressurized conduit. As shown in fig. 1, when the first pressurizing solenoid valve 182 is opened, the pressurizing medium in the first pressurizing pipeline enters the liquid storage pressurizing pipeline through the first pressurizing solenoid valve 182 and then enters the first chamber 140, so that the pressure of the first chamber 140 is increased, the isolation diaphragm 130 is deformed and protrudes towards the second chamber 150, the volume of the second chamber 150 is reduced, and the pressure of the second chamber 150 is increased, so that the purpose of discharging the liquid in the second chamber 150 from the liquid storage outlet 170 is achieved. The pressure delivery device may be a structure of the continuous water supply device provided in this embodiment, or may be an externally connected pressure delivery device. The pressure delivery device may be specifically an air compressor, a hydraulic pump or the like which can output the pressurized medium to the outside.

In one possible design, as shown in fig. 1 and 2, the liquid inlet 160 is provided with a first control switch 161, and the first control switch 161 is used for controlling the on/off state of the liquid inlet 160. When the first control switch 161 is turned on, fluid can be input into the second chamber 150 from the outside through the fluid inlet port 160. When the liquid input into the second chamber 150 is completed, the first control switch 161 is turned off to prevent the liquid in the second chamber 150 from being discharged from the liquid inlet 160 when the pressure of the second chamber 150 is increased. The first control switch 161 may be a manual control switch or an electric switch, etc. The liquid inlet 160 may be a through hole for an external inlet pipe to extend into, or a quick connector may be disposed at the through hole for connecting the external inlet pipe, and the liquid enters the second chamber 150 through the external inlet pipe. In another arrangement, a connector tube may be connected to the inlet end 160 of the reservoir and may be connected to a fluid delivery source (e.g., a reservoir or a faucet) to allow fluid to enter the second chamber 150 through the connector tube. The insertion tube may be a hose.

In one embodiment, as shown in fig. 3, the first control switch 161 is a one-way valve for allowing liquid to enter the second chamber 150 from the outside of the reservoir, and when the first pressurizing structure pressurizes the first chamber 140, the liquid in the second chamber 150 is prevented from being discharged from the reservoir inlet 160, thereby improving the sealing performance of the second chamber 150. As shown in fig. 4, the check valve includes a cylinder 1611, a baffle 1612, and a spring 1613, and the cylinder 1611 has an inlet hole 1614, an outlet hole 1615, and an inner cavity. The liquid inlet hole 1614 is communicated with the outside, the liquid outlet hole 1615 is communicated with the liquid storage and inlet end 160, and the liquid inlet hole 1614 and the liquid outlet hole 1615 are both communicated with the inner cavity. One end of the spring 1613 is fixed to the side wall of the inner cavity, and the other end is fixedly connected to the baffle 1612. When the check valve is in the initial state, the spring 1613 presses the blocking plate 1612 against the first outlet, so that the blocking plate 1612 blocks the first outlet. When the pressure in the second chamber 150 increases, the shield 1612 presses against the first outlet, thereby further preventing the liquid in the second chamber 150 from entering the liquid mixing chamber 330. The sealing of the second chamber 150 can be further improved.

In a possible design, the control system is further in signal connection with the first control switch 161 (the signal connection may be through data line communication connection, wireless communication connection, or other connection modes that can implement communication), and the control system is at least used for controlling the on/off state of the first control switch 161.

In another embodiment, the first control switch 161 is a solenoid valve, the solenoid valve is in signal connection with a control system, and the control system controls the opening and closing state of the liquid inlet 160 by controlling the opening and closing state of the solenoid valve. When the solenoid valve is opened, the liquid inlet end 160 of the liquid storage is opened, and liquid can enter the second chamber 150 through the solenoid valve; when the solenoid valve is closed, the liquid inlet end 160 is closed, and the liquid in the second chamber 150 is also prevented from being discharged from the liquid outlet end 170.

In one possible design, as shown in fig. 4, the water supply device further includes a mixing shell having a mixing cavity 330 and a mixing outlet end 350, the mixing outlet end 350 is communicated with the mixing cavity 330, and the mixing outlet end 350 is communicated with the storage inlet end 160, so that the mixing cavity 330 is communicated with the second chamber 150. The first control switch 161 is located at the connection between the mixed liquid outlet end 350 and the stored liquid inlet end 160, and the first control switch 161 is used for controlling the connection between the mixed liquid outlet end 350 and the stored liquid inlet end 160. When the liquid in the second chamber 150 is a mixed liquid formed by mixing a plurality of different solutions, the mixed liquid can be prepared by arranging a mixed liquid shell. Specifically, a plurality of different solutions are sequentially injected into the liquid mixing chamber 330 to be mixed to form a mixed liquid. The prepared mixed liquid in the mixed liquid cavity 330 is then input into the second chamber 150 from the mixed liquid outlet end 350, and the mixed liquid is discharged through the liquid outlet end 170 of the second chamber 150. As shown in fig. 4, when the mixed liquid is prepared in the mixed liquid chamber 330, the first control switch 161 is turned off, so that the water inlet end of the stored liquid is closed, the first pressurizing solenoid valve 182 is turned on, so that the pressure delivery device delivers the pressurizing medium to the first chamber 140, so that the pressure of the first chamber 140 is increased, the isolation diaphragm 130 is deformed and protrudes toward the second chamber 150, so that the pressure of the second chamber 150 is increased, and the liquid in the second chamber 150 is discharged, so that the water supply device can simultaneously perform operations of preparing the mixed liquid and outputting the mixed liquid. It should be noted that the above-mentioned process of preparing the mixed liquid is a process of introducing a plurality of liquids into the liquid mixing cavity 330, so that the plurality of liquids are mixed in the liquid mixing cavity 330 and form the mixed liquid.

In a possible design, as shown in fig. 4, the liquid mixing shell further has a liquid mixing inlet end 340, the liquid mixing inlet end 340 is communicated with the liquid mixing cavity 330, the liquid mixing inlet end 340 is provided with a second control switch 341, and the second control switch 341 is used for controlling the opening and closing state of the liquid mixing inlet end 340. The liquid inlet 340 is used for allowing external liquid to enter the liquid mixing cavity 330, and specifically, the liquid inlet 340 can be used for allowing various solutions to enter the liquid mixing cavity 330, so as to form mixed liquid with different ratios by controlling the input amount of the various solutions. The number of the liquid inlet ends 340 of the mixed liquid can be one or more. When there is one mixing liquid inlet 340, a plurality of different solutions can be injected into the mixing liquid cavity 330 through the mixing liquid inlet 340. When there are a plurality of liquid inlet ends 340, a plurality of different solutions can be injected into the liquid mixing cavity 330 from different liquid inlet ends 340. The liquid inlet 340 may be a through hole for an external liquid inlet pipe to extend into, or a quick connector may be disposed at the through hole for connecting the external liquid inlet pipe, and the solution enters the liquid mixing chamber 330 through the external liquid inlet pipe. In another arrangement, the liquid inlet end 340 is connected to a plug pipe, which can be connected to a liquid supply source (e.g., a liquid tank or a faucet) to allow the solution to enter the liquid mixing chamber 330 through the plug pipe. The insertion tube may be a hose.

In one embodiment, the second control switch 341 is in signal communication with the control system. When the mixed liquid needs to be prepared, the control system controls the second control switch 341 to be turned on, so that various different solutions enter the mixed liquid cavity 330 through the mixed liquid inlet end 340 to be mixed. The various solutions may be added to the mixing chamber 330 manually, through an external conduit, or in any other manner. When the solution is added into the liquid mixing chamber 330 manually, the operator can determine whether the amount of different solutions added meets the requirements. For example, only a set amount of solution is added at a time; or a transparent viewing port can be arranged on the liquid mixing shell, scale marks are arranged in the liquid mixing cavity 330, and after the liquid reaches the scale marks, the addition of various different solutions is finished, and the process of preparing the mixed liquid is finished. When solution is added into the liquid mixing cavity 330 by means of an external pipeline, the external pipeline is communicated with the liquid mixing inlet end 340, and the on-time of the second control switch 341 is controlled by the control system to control the addition amount of different solutions. For example, the control system first controls the second control switch 341 to turn on for a first time period to add a first amount of the first solution into the liquid mixing chamber 330, and after the first time period is over, the addition of the first solution is over; the control system controls the second control switch 341 to be turned off to prepare for adding the second solution, the control system controls the second control switch 341 to be turned on for a second time period to add the second quantitative second solution to the solution mixing chamber 330, and after the second time period is finished, the addition of the second solution is finished. And by analogy, when all the solutions are added, the control system controls the second control switch 341 to be turned off, and the solution is stopped being added into the solution mixing chamber 330.

In a specific embodiment, as shown in fig. 3, the liquid mixing housing includes a second housing 310 and a second housing cover 320, the second housing 310 has a second inner cavity and a second opening, the second inner cavity is communicated with the second opening, and the second housing cover 320 covers the second opening, so that the second housing cover 320 covers the second inner cavity to form the liquid mixing chamber 330. The second housing 310 is fixedly connected with the second housing cover 320, and the second housing 310 and the second housing cover 320 may be connected by screws, fasteners, or may be connected by threads.

In a possible embodiment, the water supply device further comprises a second sealing ring, which is located between the second housing 310 and the second housing cover 320, and specifically, the second sealing ring can be mounted on the second housing 310 and also on the second housing cover 320. Illustratively, a second sealing ring is disposed on a side of the second housing 310 close to the second housing cover 320, and when the second housing 310 is fixedly connected to the second housing cover 320, the second sealing ring is located between the second housing 310 and the second housing cover 320, and the second sealing ring is in close contact with the second housing 310 and the second housing cover 320, respectively, so as to improve the sealing performance of the liquid mixing chamber 330.

In one possible design, the first housing 110 and the second housing 310 are connected by a connecting portion. The first control switch 161 is disposed in the connecting portion, the first control switch 161 may be a one-way valve, and the mixed liquid outlet end 350 and the stored liquid inlet end 160 are respectively communicated with the one-way valve through the connecting portion. As shown in FIG. 3, the connection portion has a mounting hole, the check valve is located in the mounting hole, and the mixed liquid outlet end 350 and the stored liquid inlet end 160 are respectively communicated with the mounting hole. A limiting plate 1617 is arranged at the opening of the mounting hole, the limiting plate 1617 is fixedly connected with the connecting portion, one end of the check valve is connected with the limiting plate 1617, and the limiting plate 1617 is used for fixing the check valve relative to the mounting hole. The connection between the limiting plate 1617 and the connecting part may be welding, gluing, or connecting by an auxiliary connecting part (screw or bolt, etc.). Specifically, the limiting plate 1617 is fixedly connected with the connecting portion through a screw 1616 and fixed by the screw 1616, so that the check valve is convenient to disassemble and maintain. The first shell 110, the second shell 310 and the connecting portion can be of an integral injection molding structure, so that the installation step of connecting the first shell 110 and the second shell 310 is saved, and the installation efficiency and the sealing effect are improved.

In another possible design, the liquid storage chamber and the liquid mixing chamber 330 may be two different chambers in one housing, and the liquid storage chamber and the liquid mixing chamber 330 are separated by a partition. The partition board is provided with a communicating hole, and the liquid storage cavity is communicated with the liquid mixing cavity 330 through the communicating hole. The mixed liquid outlet end 350 and the stored liquid inlet end 160 are respectively positioned at two ends of the communicating hole, the mixed liquid outlet end 350 is positioned at one end of the communicating hole close to the mixed liquid cavity 330, and the stored liquid inlet end 160 is positioned at one end of the communicating hole close to the stored liquid cavity. The check valve is arranged on the communication hole, and the check valve can be positioned in the middle or at two ends of the communication hole. The liquid storage cavity and the liquid mixing cavity 330 are arranged in one shell, so that the installation step of connecting the first shell 110 and the second shell 310 can be saved, the installation efficiency is improved, and the sealing effect is improved.

In one possible design, the water supply device further includes a second pressurizing structure, the second pressurizing structure is communicated with the liquid mixing cavity 330, and the second pressurizing structure is used for pressurizing the liquid mixing cavity 330 so that the liquid in the liquid mixing cavity 330 enters the second chamber 150 through the liquid storage inlet end 160.

In one embodiment, the second pressurizing structure includes a second pressurizing solenoid valve 361 and a second pressurizing pipeline, the second pressurizing solenoid valve 361 is communicated with the liquid mixing chamber 330, one end of the second pressurizing pipeline is communicated with the second pressurizing solenoid valve 361, and the other end of the second pressurizing pipeline is communicated with the pressure delivery device. The second pressurizing solenoid valve 361 is in signal connection with the control system, the control system is further configured to control an open/close state of the second pressurizing solenoid valve 361, so as to control a communication state of the second pressurizing pipeline and the liquid mixing cavity 330, and the pressure delivery device is further configured to deliver a pressurizing medium into the second pressurizing pipeline. When the second pressurizing solenoid valve 361 is opened, the second pressurizing pipeline is communicated with the liquid mixing cavity 330, and the pressurizing medium in the second pressurizing pipeline enters the liquid mixing cavity 330 to pressurize the liquid mixing cavity 330, so that the liquid in the liquid mixing cavity 330 is output from the liquid mixing outlet and enters the second chamber 150 through the first control switch 161.

In another embodiment, the second pressure line is not in communication with the pressure delivery device, the second pressure line is connected to the pressure regulating valve and the pressure control valve, respectively, the second pressure line is directly connected to the pressure regulating valve, and the second pressure line is connected to the pressure control valve through the pressure regulating valve. The pressure control valve is used to control the external pressurized medium to enter the second pressurized pipeline, and the pressurized medium entering the second pressurized pipeline can be a pressurized gas which is processed and does not affect the liquid in the liquid mixing chamber 330 (the effect here refers to the pollution of the liquid in the liquid mixing chamber 330 or the reaction of the pressurized gas with the liquid in the liquid mixing chamber 330). After the pressure control valve is opened, the pressurized gas enters the second pressurization pipeline after being subjected to pressure regulation by the pressure regulating valve, and then enters the liquid mixing cavity 330 through the second pressurization pipeline. The pressure regulating valve regulates the pressure of the pressurized gas and controls the flow rate of the liquid output from the liquid mixing cavity 330, so that the liquid output from the liquid mixing cavity 330 is more stable.

In one embodiment, the liquid mixing chamber 330 may also be provided with a separation diaphragm 130, and the separation diaphragm 130 divides the liquid mixing chamber 330 into a third chamber and a fourth chamber. The mixed liquid inlet end 340 and the mixed liquid outlet end 350 are both communicated with the fourth chamber, and the second pressurizing structure is communicated with the third chamber. The second pressurizing structure pressurizes the third chamber, and the isolation diaphragm 130 deforms and protrudes towards the fourth chamber, so that the volume of the fourth chamber becomes smaller, the pressure of the fourth chamber is increased, and the purpose of outputting the liquid in the fourth chamber to the second chamber 150 is achieved. An isolation diaphragm 130 is provided in the liquid mixing chamber 330 to prevent the pressurized medium from contacting the liquid in the fourth chamber, thereby preventing contamination of the liquid in the fourth chamber.

In one embodiment, the control system is in signal communication with a first pressurizing solenoid valve 182 and a second pressurizing solenoid valve 361, respectively. When liquid needs to be injected into the second chamber 150, the control system controls the second pressurizing solenoid valve 361 to be opened, so that the pressure conveying device conveys the pressurizing medium into the liquid mixing cavity 330, the liquid in the liquid mixing cavity 330 is discharged through the liquid mixing outlet end 350, the first control switch 161 is opened, and the liquid enters the second chamber 150 from the liquid storage inlet end 160 through the first control switch 161. The pressure delivery device delivers the pressurized medium to the liquid mixing cavity 330, so that the liquid in the liquid mixing cavity 330 enters the second chamber 150, and simultaneously the liquid in the second chamber 150 can be output from the liquid storage and output end 170 to the external water end. When the mixed liquid needs to be prepared, the control system controls the second pressurizing electromagnetic valve 361 to be closed and controls the second control switch 341 to be opened, so that the mixed liquid inlet end 340 is opened, and a plurality of external liquids enter the mixed liquid cavity 330 through the mixed liquid inlet end 340 to be mixed in the mixed liquid cavity 330 to form the mixed liquid. During the preparation of the mixed liquor, the control system also controls the first pressurizing solenoid valve 182 to open to pressurize the first chamber 140, thereby allowing the liquid in the second chamber 150 to drain.

In one possible design, as shown in fig. 4, a liquid level sensor 331 is disposed in the liquid mixing chamber 330, the liquid level sensor 331 is in signal connection with the control system, and the liquid level sensor 331 is configured to detect a liquid level in the liquid mixing chamber 330 and feed the liquid level back to the control system. The control system controls the on-off state of the first pressurizing structure and the second pressurizing structure according to the liquid level height value fed back by the liquid level sensor 331. The control system is preset with a minimum liquid level height value. When the liquid level height of the liquid mixing chamber 330 is greater than the minimum liquid level height, it means that there is enough liquid in the liquid mixing chamber 330 for outputting into the second chamber 150.

In one embodiment, when the liquid level in the liquid mixing chamber 330 is higher than the minimum liquid level, the control system controls the second pressurizing solenoid valve 361 to open to pressurize the liquid mixing chamber 330, so that the liquid in the liquid mixing chamber 330 enters the second chamber 150, the liquid in the second chamber 150 increases, and the pressure in the second chamber 150 increases, so that the liquid in the second chamber 150 is output from the liquid outlet end 170. When the liquid level height value of the liquid mixing cavity 330 reaches or is smaller than the lowest liquid level height value, the control system controls the second pressurizing solenoid valve 361 to be closed, stops pressurizing the liquid mixing cavity 330, and adds a plurality of different solutions into the liquid mixing cavity 330 through the liquid mixing inlet end 340. When the mixed liquid is prepared in the liquid mixing cavity 330, the control system controls the first pressurizing solenoid valve 182 to open to pressurize the first chamber 140, so that the isolation diaphragm 130 deforms and protrudes toward the second chamber 150, the pressure of the second chamber 150 increases, and the liquid in the second chamber 150 continues to be output from the liquid outlet end 170. After the addition of the multiple solutions is completed, the control system controls the second pressurizing solenoid valve 361 to open, the first pressurizing solenoid valve 182 to close, and the liquid mixing chamber 330 is continuously pressurized, so that the mixed liquid in the liquid mixing chamber 330 is delivered to the second chamber 150, the mixed liquid in the second chamber 150 is increased, the pressure in the second chamber 150 is increased, and the mixed liquid in the second chamber 150 is output from the liquid storage inlet 160.

In one possible design, as shown in fig. 1, a pressure detector 151 is connected to the liquid storage casing, the pressure detector 151 is communicated with the second chamber 150, the pressure detector 151 is used for detecting the pressure in the second chamber 150, the pressure detector 151 is in signal connection with a control system, and the control system controls the opening and closing states of the first pressurizing structure and the second pressurizing structure according to the pressure value fed back by the pressure detector 151. The pressure detector 151 may be a pressure switch or a pressure sensor or the like capable of detecting the ambient pressure.

In one embodiment, as shown in fig. 4, the pressure detector 151 is in communication with the second chamber 150, and the pressure detector 151 is specifically configured to detect a pressure value of the second chamber 150 and feed the pressure value back to the control system. The following control system controls the on/off states of the first pressurizing solenoid valve 182 and the second pressurizing solenoid valve 361 according to the pressure value, both on the premise that the liquid level in the liquid mixing chamber 330 is higher than the minimum liquid level height value. If the liquid level in the liquid mixing chamber 330 reaches or is lower than the minimum liquid level, the control system controls the second pressurizing solenoid valve 361 to close regardless of the pressure in the second chamber 150. The control system presets a maximum pressure value and a minimum pressure value, and when the pressure value is greater than the minimum pressure value and less than the maximum pressure value, the control system controls the second pressurizing solenoid valve 361 to open, continuously conveys the liquid in the liquid mixing chamber 330 to the second chamber 150, and outputs the liquid in the second chamber 150 from the liquid storage and output end 170. When the pressure value reaches the maximum pressure value, the control system controls the second pressurizing solenoid valve 361 to be closed, the first pressurizing solenoid valve 182 to be opened, namely, the liquid mixing cavity 330 is stopped from being pressurized, the liquid is stopped from being input into the second cavity 150, the first cavity 140 is started to be pressurized, the liquid in the second cavity 150 is continuously output from the liquid storage end 170, and when the pressure value reaches or is lower than the minimum pressure value, the control system controls the first pressurizing solenoid valve 182 to be closed and controls the second pressurizing solenoid valve 361 to be opened, so that the liquid in the liquid mixing cavity 330 is continuously conveyed to the second cavity 150.

In a possible design, the water supply device further comprises a sound-deadening structure, which is connected to the first pressurizing structure. The sound attenuating structure is configured to reduce sound generated by the first pressurizing structure when the first pressurizing structure pressurizes the first chamber 140. Specifically, as shown in fig. 5, the sound deadening structure includes a sound deadening box 400 and a sound deadening pipe 410, the sound deadening box 400 communicates with the first pressurizing solenoid valve 182 through the sound deadening pipe 410, and when the first pressurizing solenoid valve 182 is opened, part of the pressurizing medium enters the sound deadening pipe 410 from the first pressurizing pipe through the first pressurizing solenoid valve 182, and then the pressurizing medium enters the sound deadening box 400 through the sound deadening pipe 410. The sound-deadening box 400 is provided therein with a flexible substance, which may be a sponge block, foam, cotton, or the like, and may be configured to absorb a part of the sound generated by the movement of the pressurizing medium in the first pressurizing solenoid valve 182 and the first pressurizing pipe when the first pressurizing solenoid valve 182 is opened, so that the sound generated when the first pressurizing structure pressurizes the first chamber 140 is reduced. A side wall of the sound-deadening box 400 is provided with a through hole for discharging the pressurized medium in the sound-deadening box 400. By providing the silencing structure, when the first pressurizing structure pressurizes the first chamber 140, the sound generated by the first pressurizing structure is reduced, so that the silencing effect of the water supply device is better.

In one possible design, the sound dampening structure is further coupled to the second pressurizing structure such that when the second pressurizing structure pressurizes the liquid mixing chamber 330, the sound generated by the second pressurizing structure is reduced. In one embodiment, the number of the silencing pipes 410 is plural, one silencing pipe 410 is correspondingly disposed on the second pressurizing solenoid valve 361, and the second pressurizing solenoid valve 361 is communicated with the silencing box 400 through the corresponding silencing pipe 410. Further, the sound attenuation structure further comprises a communication box, a cavity is arranged inside the communication box, the first pressurizing solenoid valve 182 is communicated with the cavity of the communication box through a sound attenuation pipeline 410, the second pressurizing solenoid valve 361 is communicated with the cavity of the communication box through another sound attenuation pipeline 410, and the communication box is communicated with the sound attenuation box 400 through a main sound attenuation pipeline 410. By providing the communicating box, the silencing box 400 can be communicated with the first pressurizing solenoid valve 182 and the second pressurizing solenoid valve 361 only by providing one connecting port, so that the number of openings of the silencing box 400 is reduced, and excessive pressurizing medium is prevented from being discharged from the silencing box 400.

The embodiment also provides dental chair equipment which comprises the water supply device in any technical scheme. Because the rivers of water supply installation output are more steady, and the liquid among the water supply installation is difficult for receiving the pollution, consequently the rivers output of dental chair equipment is also more steady, and the water source is cleaner.

In one embodiment, the dental chair apparatus comprises a working end and a working channel, one end of the working channel being in communication with the working end and the other end being in communication with the liquid storage end 170, the liquid in the second chamber 150 flowing through the working channel to the working end after being discharged from the liquid storage end 170. The quantity of work end and working pipe can be a plurality of, and every work end is connected with a working pipe at least, and work end and working pipe intercommunication, a plurality of working pipe's one end finally all assemble and go into liquid hole department at a dental chair, and a plurality of working pipe all go into liquid hole intercommunication with the dental chair. The dental chair liquid inlet is communicated with the liquid storage and outlet end 170 so that liquid in the second chamber 150 can enter different working pipelines through the dental chair liquid inlet after being discharged from the liquid storage and outlet end 170 and then flow to each working end.

The present application is intended to cover various modifications, equivalent arrangements, and adaptations, which may be made within the spirit and scope of the present application.

Claims (10)

1. A water supply device, comprising:

the liquid storage shell is provided with a liquid storage cavity, a liquid storage inlet end and a liquid storage outlet end;

the isolation diaphragm is arranged in the liquid storage cavity, the isolation diaphragm divides the liquid storage cavity into a first cavity and a second cavity, and the liquid inlet end and the liquid outlet end of the liquid storage are both communicated with the second cavity;

a first pressurizing structure in communication with the first chamber, the first pressurizing structure for delivering a pressurizing medium to the first chamber.

2. The water supply of claim 1 wherein the reservoir comprises a first housing and a first housing cover, the first housing and the first housing cover being removably coupled, the isolation diaphragm being positioned between the first housing and the first housing cover, the first housing cover and the isolation diaphragm defining the first chamber therebetween, the first housing and the isolation diaphragm defining the second chamber therebetween.

3. The water supply device as claimed in claim 2, wherein said first housing has a first inner cavity and a first opening, said first opening communicating with said first inner cavity, said first housing cover is provided with a boss, said first housing cover closes said first opening, said boss is located in said first inner cavity.

4. The water supply of claim 3 wherein said first housing includes a mounting platform in said first interior chamber and projecting from an interior side wall of said first housing, said boss capturing said outer peripheral edge of said isolation diaphragm between said boss and said mounting platform.

5. The water supply of claim 4 wherein the boss includes a first projection, and wherein an edge of the isolation diaphragm is provided with a recess, the first projection extending into the recess to capture the isolation diaphragm between the first projection and the mounting platform and between an inner side wall of the first housing and the first projection.

6. The water supply device according to claim 1, further comprising a control system, wherein the first pressurizing structure comprises a first pressurizing solenoid valve and a pressurizing pipeline, the pressurizing pipeline is connected with the first pressurizing solenoid valve and communicated with the first chamber, the first pressurizing solenoid valve is in signal connection with the control system, the pressurizing pipeline is used for allowing the pressurizing medium to enter the first chamber, and the control system is used for controlling the opening and closing state of the first pressurizing solenoid valve so as to control the opening and closing state of the pressurizing pipeline.

7. The water supply device as claimed in claim 1, wherein the liquid inlet end of the liquid storage tank is provided with a first control switch, and the first control switch is used for controlling the opening and closing state of the liquid inlet end of the liquid storage tank.

8. The water supply device according to claim 1, further comprising a mixing shell having a mixing chamber and a mixing outlet end, wherein the mixing outlet end is communicated with the mixing chamber and the mixing outlet end is communicated with the storage inlet end, so that the mixing chamber is communicated with the second chamber;

the water supply installation still includes second pressurization structure, second pressurization structure with mix the sap cavity intercommunication, second pressurization structure be used for to mix the sap cavity pressurization, so that the liquid in mixing the sap cavity passes through stock solution inlet end and gets into the second cavity.

9. The water supply device according to claim 8, further comprising a control system, wherein a pressure detector is connected to the liquid storage shell, the pressure detector is communicated with the second chamber and is used for detecting the pressure in the second chamber, the pressure detector is in signal connection with the control system, and the control system controls the opening and closing states of the first pressurizing structure and the second pressurizing structure according to the pressure value fed back by the pressure detector.

10. A dental chair apparatus comprising a water supply device as claimed in any one of claims 1 to 9.

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