Quantitative liquid suction valve

Abstract

The utility model provides a quantitative liquid suction valve. The quantitative liquid suction valve comprises a shell, a valve plate, an upper cover and an elastic piece. The shell is provided with a pressure cavity, and the shell is further provided with a first liquid inlet and a first liquid outlet which are communicated with the pressure cavity. And the valve plate is hermetically arranged at the opening of the pressure cavity. The deformation part is elastically deformed under the change of pressure in the pressure cavity, so that the deformation part protrudes towards or away from the pressure cavity. The upper cover is provided with a liquid storage cavity. The deformation movement of the valve plate drives the elastic piece to elastically deform, the valve plate recovers elastic deformation, and the elastic piece resets to drive the valve plate to move. The deformation part protrudes towards the pressure cavity, a target solution is sucked into the liquid storage cavity from the second liquid inlet, the valve plate elastically deforms to extrude the liquid storage cavity, the target solution is discharged out of the liquid storage cavity from the second liquid outlet, the elastic deformation of the valve plate and the elastic piece is recovered, the valve plate reversely deforms to expand the liquid storage cavity, and the target solution enters the liquid storage cavity from the second liquid inlet. The quantitative liquid suction valve is simple in structure, and the suction amount is accurately controlled.

Description

Technical Field

[0001] The utility model relates to a liquid flow valve, in particular to a quantitative liquid suction valve. Background Art

[0002] In a variety of water-related electrical appliances, there is usually at least one liquid passage for liquid transmission. During the use of the electrical appliance, it is usually necessary to quantitatively suck another solvent for mixing with the liquid passage. For example, during the use of a fully automatic washing machine, it is necessary to automatically add washing liquid and complete the washing.

[0003] However, traditional suction valves usually require a suction pump to extract the solvent by the extraction action of the suction pump. For the setting of the suction pump, on the one hand, the circuit design is relatively complex, and on the other hand, an independent control system needs to be additionally set for the negative pressure pump to control the suction pump to achieve the extraction of the solvent. Therefore, for traditional suction valves, a suction pump is required for extraction. Since the suction pump needs to be controlled by an electrical signal, there is a certain delay for the suction pump to receive the control electrical signal and achieve startup or stop. Therefore, when using the suction pump to extract a certain amount of solvent, there are certain differences in the volume of the extracted solvent, which is not conducive to precise control. Summary of the Utility Model

[0004] The utility model can provide a quantitative liquid suction valve with relatively low cost and accurate control.

[0005] A quantitative liquid suction valve for sucking a target solution, comprising:

[0006] A housing provided with a pressure chamber, one end of the pressure chamber being open, the housing further being provided with a first liquid inlet and a first liquid outlet communicating with the pressure chamber, the first liquid inlet being used for inputting a pressure medium flow, and the first liquid outlet being used for outputting the pressure medium flow;

[0007] A valve plate hermetically arranged at the opening of the pressure chamber, the valve plate being provided with a deformation part, the deformation part undergoing elastic deformation under the pressure change in the pressure chamber, so that the deformation part protrudes towards or away from the pressure chamber;

[0008] An upper cover provided with a liquid storage chamber, the upper cover being hermetically covered on the housing and hermetically connected to the valve plate, the liquid storage chamber being provided with a second liquid inlet and a second liquid outlet, the second liquid inlet being used for sucking the target solution, and the second liquid outlet being used for discharging the sucked target solution;

[0009] An elastic member elastically limited between the valve plate and the upper cover, the deformation movement of the valve plate driving the elastic member to undergo elastic deformation, and when the valve plate restores elastic deformation, the elastic member resets to drive the valve plate to move;

[0010] The deformation part protrudes towards the pressure chamber. The target solution is sucked into the liquid storage chamber from the second liquid inlet. The valve plate undergoes elastic deformation to squeeze the liquid storage chamber. The target solution is discharged from the second liquid outlet of the liquid storage chamber. The valve plate and the elastic member recover their elastic deformation. The valve plate deforms in the reverse direction to expand the liquid storage chamber. The target solution enters the liquid storage chamber from the second liquid inlet.

[0011] In one embodiment, the upper cover is provided with a receiving cavity protruding upwards. One end of the elastic member is received in the receiving cavity, and the other end of the elastic member is fixedly connected to the valve plate.

[0012] In one embodiment, it further includes a connecting rod. The connecting rod includes a rod body and a fixing plate provided at one end of the rod body. The rod body is received in the receiving cavity. The fixing plate is fixedly connected to the valve plate. The valve plate protrudes or depresses towards the liquid storage chamber, driving the connecting rod to move up and down and causing the elastic member to expand and contract.

[0013] In one embodiment, the valve plate is circular, and the deformation part is in a trumpet shape.

[0014] In one embodiment, a flange is provided on one side of the valve plate facing the housing. An annular groove is provided on the outer peripheral edge of the top end of the housing. The flange is received in the annular groove.

[0015] In one embodiment, an annular rib is further provided at the pressing portion of the upper cover and the valve plate. The annular rib presses on the valve plate to make the upper cover and the valve plate hermetically connected.

[0016] In one embodiment, a liquid inlet one-way valve is provided at the second liquid inlet, and a liquid outlet one-way valve is provided at the second liquid outlet.

[0017] In one embodiment, the housing is snap-fitted with the upper cover.

[0018] In one embodiment, a stepped portion is provided on the inner side wall of the first liquid outlet, and the stepped portion protrudes towards the inside of the first liquid outlet.

[0019] In one embodiment, the second liquid inlet and the second liquid outlet of the housing are also connected with connectors. The shape of the connector includes a large head end and a small head end. The large head end is fixedly connected to the housing and communicates with the liquid storage chamber.

[0020] From the above technical solutions, it can be seen that the present utility model has at least the following advantages and positive effects:

[0021] For the quantitative liquid suction valve of this embodiment, when the pressure medium flow flows into the pressure chamber, the pressure of the pressure medium flow increases the pressure in the pressure chamber, causing the valve plate to deform. The valve plate bulges upward and deforms, squeezing the space in the liquid storage chamber to empty the space in the liquid storage chamber. At the same time, the movement of the valve plate also drives the elastic member to undergo compressive elastic deformation. When the pressure medium flow in the pressure chamber stops flowing, the pressure in the pressure chamber decreases, the elastic member elongates to recover its elastic deformation, drives the valve plate to move downward, and at the same time the valve plate recovers its elastic deformation, sucking and filling the target solution into the liquid storage chamber. When the pressure medium flow flows into the pressure chamber again, the valve plate bulges upward again and deforms, quantitatively discharging the target solution from the liquid storage chamber. Since the size of the space in the liquid storage chamber is a fixed value, the volume of the discharged target solution is also a fixed value. Moreover, the quantitative liquid suction valve of this embodiment can drive the suction effect of the liquid suction valve on the target solution without using a suction pump, avoiding the addition of an extra suction pump, reducing the manufacturing cost of the quantitative liquid suction valve, and simplifying the pipeline control. Brief Description of the Drawings

[0022] Figure 1 is a perspective schematic diagram of the quantitative liquid suction valve of this embodiment;

[0023] Figure 2 is Figure 1 a cross-sectional view of the quantitative liquid suction valve shown;

[0024] Figure 3 is Figure 1 an exploded schematic diagram of the quantitative liquid suction valve shown.

[0025] The descriptions of the reference numerals are as follows:

[0026] 1. Quantitative liquid suction valve;

[0027] 11. Housing; 111. Pressure chamber; 112. First liquid inlet; 113. First liquid outlet; 114. Annular groove; 115. Clamping projection; 116. Step portion;

[0028] 12. Valve plate; 121. Deformation portion; 122. Flange;

[0029] 13. Upper cover; 131. Liquid storage chamber; 132. Second liquid inlet; 133. Second liquid outlet; 134. Annular rib; 135. Receiving cavity; 136. Liquid inlet check valve; 1362. Liquid inlet stop piece; 137. Liquid outlet check valve; 1372. Liquid outlet stop piece; 138. Clamping fin; 139. Connector; 130. Card slot;

[0030] 14. Elastic member;

[0031] 15. Connecting rod; 151. Fixed disk; 152. Rod body. Detailed Embodiment

[0032] Typical embodiments embodying the features and advantages of the present utility model will be described in detail in the following description. It should be understood that the present utility model can have various variations in different embodiments, all of which do not depart from the scope of the present utility model, and the descriptions and illustrations therein are essentially for illustrative purposes and not for limiting the present utility model.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0034] Please refer to Figure 1 and Figure 2 , a quantitative liquid suction valve is used to suck a target solution. The quantitative liquid suction valve 1 includes a housing 11, a valve sheet 12, an upper cover 13 and an elastic member 14.

[0035] The housing 11 is provided with a pressure chamber 111. One end of the pressure chamber 111 is open. The housing 11 is provided with a first liquid inlet 112 and a first liquid outlet 113 that communicate with the pressure chamber 111. The first liquid inlet 112 is used to input a pressure medium flow, and the first liquid outlet 113 is used to output a pressure medium flow. When the pressure medium flow is opened, the pressure medium flow flows in from the first liquid inlet 112 and flows out from the first liquid outlet 113.

[0036] The pressure medium flow has a certain pressure. When the pressure medium flow flows into the pressure chamber 111, it will fill the pressure chamber 111 with the pressure medium flow. Among them, the pressure medium flow can be a pressure water flow. The specific type of the pressure medium flow is not limited here, and it can be a water flow or other media, such as liquid oil, etc.

[0037] The valve sheet 12 is sealingly arranged at the opening of the pressure chamber 111. The valve sheet 12 is provided with a deformation part 121, and the deformation part undergoes elastic deformation due to the pressure change in the pressure chamber 111, causing the deformation part 121 to bulge towards or away from the pressure chamber 111.

[0038] The upper cover 13 is provided with a liquid storage cavity 131. The upper cover 13 is hermetically covered on the housing 11 and is hermetically connected to the valve plate 12. The liquid storage cavity 131 is provided with a second liquid inlet 132 and a second liquid outlet 133. The second liquid inlet 132 is used to suck the target solution, and the second liquid outlet 133 is used to discharge the sucked target solution.

[0039] The elastic member 14 is elastically limited between the valve plate 12 and the upper cover 13. The deformation movement of the valve plate 12 drives the elastic member 14 to undergo elastic deformation. When the valve plate 12 restores elastic deformation, the elastic member 14 resets to drive the valve plate 12 to move.

[0040] The deformation part 121 protrudes towards the pressure cavity 111. The target solution is sucked from the second liquid inlet 132 into the liquid storage cavity 131. The valve plate 12 undergoes elastic deformation and squeezes the liquid storage cavity 131. The target solution is discharged from the second liquid outlet 133 out of the liquid storage cavity 131. The valve plate 12 and the elastic member 14 restore elastic deformation. The valve plate 12 deforms in the reverse direction to expand the liquid storage cavity 131, and the target solution enters the liquid storage cavity 131 from the second liquid inlet 132.

[0041] For the quantitative liquid suction valve of this embodiment, when the pressure medium flow flows into the pressure cavity 111, the pressure of the pressure medium flow increases the pressure in the pressure cavity 111, thereby causing the valve plate 12 to deform. The valve plate 12 bulges upward and deforms, squeezing the space of the liquid storage cavity 131 to empty the space of the liquid storage cavity 131. At the same time, the movement of the valve plate 12 also drives the elastic member 14 to undergo compressive elastic deformation. When the pressure medium flow in the pressure cavity 111 stops flowing, the pressure in the pressure cavity 111 decreases. The elastic member 14 elongates to restore elastic deformation, driving the valve plate 12 to move downward. At the same time, the valve plate 12 restores elastic deformation, sucking and filling the target solution into the liquid storage cavity 131. When the pressure medium flow flows into the pressure cavity 111 again, the valve plate 12 bulges upward again and deforms, quantitatively discharging the target solution from the liquid storage cavity 131. Since the size of the space of the liquid storage cavity 131 is a fixed value, the volume of the discharged target solution is also a fixed value. Therefore, the quantitative liquid suction valve of this embodiment can drive the suction effect of the liquid suction valve on the target solution without using a suction pump, avoiding the addition of an extra suction pump, reducing the manufacturing cost of the quantitative liquid suction valve, and simplifying the pipeline control.

[0042] A step portion 116 is provided at the end of the first liquid outlet 113. The step portion 116 protrudes towards the inside of the first liquid outlet 113. The aperture of the step portion 116 is smaller than the aperture of the first liquid outlet 113. The step portion 116 can help the power cavity generate sufficient pressure and increase the pressure of the pressure water flow flowing out of the first liquid outlet 113.

[0043] The shape of the valve plate 12 can be circular. In the radial direction of the valve plate 12, the valve plate 12 includes a deformation part 121 and a flange 122. The deformation part 121 is trumpet-shaped. The flange 122 is provided on one side of the valve plate 12 facing the housing 11 and is located at the outermost edge of the valve plate 12. An annular groove 114 is provided on the outer peripheral edge of the top end of the housing 11. The flange 122 is received in the annular groove 114. The large-diameter end of the deformation part 121 is connected to the flange 122. The deformation of the valve plate 12 is caused by the upward protrusion or downward depression of the deformation part 121. The gradual shape of the deformation part 121 enables the deformation part 121 to deform conveniently.

[0044] Moreover, the housing 11 is snap-fitted with the upper cover 13. Specifically, a snap projection 115 is provided on the outer sidewall of the housing 11. The upper cover 13 is disposed in a card slot 130. The card slot 130 is snap-fitted with the snap projection 115 to fixedly connect the housing 11 and the upper cover 13. After the housing 11 and the upper cover 13 are snap-fitted and fixed, the housing 11 and the upper cover 13 press the valve plate 12 against each other, so that a sealed connection is maintained between the housing 11 and the valve plate 12, and between the upper cover 13 and the valve plate 12.

[0045] Moreover, an annular rib 134 is further provided at the pressing portion of the upper cover 13 and the valve plate 12. The annular rib 134 presses on the valve plate 12 to make a sealed connection between the upper cover 13 and the valve plate 12.

[0046] The annular rib 134 presses on the valve plate 12, further enhancing the sealing performance between the upper cover 13 and the valve plate 12. The valve plate 12 is disposed opposite to the top end face of the fixed disk 151. The annular rib 134 and the fixed disk 151 press the valve plate 12 in the up and down directions respectively.

[0047] The upper cover 13 protrudes upward to form a receiving cavity 135. One end of the elastic member 14 is received in the receiving cavity 135. The other end of the elastic member 14 is fixedly connected to the valve plate 12.

[0048] The metering liquid suction valve may further include a connecting rod 15. Please refer to Figure 3 simultaneously. The connecting rod 15 includes a fixed disk 151 and a rod body 152. The fixed disk 151 is disposed at one end of the rod body 152. The rod body 152 is received in the receiving cavity 135, and the elastic member 14 is sleeved on the rod body 152. The fixed disk 151 is fixedly connected to the valve plate 12. The valve plate 12 protrudes toward the liquid storage cavity 131, driving the connecting rod 15 to move upward. The rod body 152 moves upward, compressing the elastic member 14 in the receiving cavity 135. The valve plate 12 squeezes the target solution in the liquid storage cavity 131, causing the target solution to be discharged from the first liquid outlet 113. When the elastic member 14 resumes its elastic deformation, it drives the rod body 152 to move downward, causing the valve plate 12 to protrude toward the pressure cavity 111, creating a negative pressure in the liquid storage cavity 131 and attracting the target solution to be sucked into the liquid storage cavity 131 from the first liquid inlet 112.

[0049] One end of the rod body 152 close to the valve piece 12 is provided with a fixing plate 151. The fixing plate 151 is used for fixedly connecting with the valve piece 12. The connecting area between the fixing plate 151 and the valve piece 12 is relatively large, so that a good driving relationship is maintained between the fixing plate 151 and the valve piece 12.

[0050] Specifically in this embodiment, the elastic member 14 can be a spring, an elastic rubber tube, etc.

[0051] Both ends of the elastic member 14 are stopped and limited respectively through the bottom of the receiving cavity 135 and the fixing plate 151, so that the elastic member 14 is always sleeved on the rod body 152.

[0052] Specifically in this embodiment, the second liquid inlet 132 and the second liquid outlet 133 are also provided with connectors 139. The shape of the connector 139 includes a large head end and a small head end. The large head end is fixedly connected with the housing 11 and communicated with the liquid storage cavity 131. The small head end can be convenient for connecting with a pipe body.

[0053] Moreover, the second liquid inlet 132 is provided with a liquid inlet one-way valve 136, and the second liquid outlet 133 is provided with a liquid outlet one-way valve 137.

[0054] The liquid inlet one-way valve 136 is provided with a liquid inlet stop piece 1362. The liquid inlet stop piece 1362 is located at the connection between the second liquid inlet 132 and the liquid storage cavity 131. The liquid inlet stop piece 1362 can make the target solution only flow in from the outside to the inside and cannot flow out from the inside to the outside.

[0055] The liquid outlet one-way valve 137 is provided with a liquid outlet stop piece 1372. The liquid outlet stop piece 1372 is located at the port of the second liquid outlet 133 far away from the liquid storage cavity 131. The liquid outlet stop piece 1372 can make the target solution only flow out from the inside to the outside and cannot flow in from the outside to the inside.

[0056] The upper cover 13 is provided with clamping wings 138, and clamping grooves 130 are formed on the clamping wings 138. The outer side wall of the housing 11 is provided with clamping protrusions 115. When the housing 11 and the upper cover 13 are clamped and connected, the clamping grooves 130 and the clamping protrusions 115 are clamped and connected, so that the housing 11 and the upper cover 13 are fixedly connected. After the housing 11 and the upper cover 13 are clamped and fixed, the housing 11 and the upper cover 13 press the valve piece 12 against each other, so that a sealed connection is maintained between the housing 11 and the valve piece 12, and between the upper cover 13 and the valve piece 12.

[0057] When the pressure medium flow is opened and the pressure medium flow flows into the pressure chamber 111, the pressure in the pressure chamber 111 increases, causing the valve plate 12 to bulge outwards and undergo elastic deformation, thereby squeezing the space of the liquid storage chamber 131 and reducing the space of the liquid storage chamber 131. When the pressure medium flow is closed, the pressure in the pressure chamber 111 decreases, the valve plate 12 resumes elastic deformation, bulges towards the pressure chamber 111, the space of the liquid storage chamber 131 increases, the pressure in the liquid storage chamber 131 decreases, and thus the target solution is sucked into the liquid storage chamber 131 from the second liquid inlet 133. When the pressure medium flow is opened again and flows into the pressure chamber 111, the valve plate 12 deforms again. The valve plate 12 bulges towards the liquid storage chamber 131, and the target solution is discharged from the second liquid outlet 133. Since the space size corresponding to each deformation amount of the valve plate 12 is a fixed size, the volume of the target solution sucked each time is also a fixed amount, thereby achieving the purpose of sucking a fixed amount of the target solution. This control method for quantitatively sucking the target solution can keep the extraction amount of the target solution constant and will not cause different extraction amounts due to factors such as control signal delay.

[0058] Therefore, in the above quantitative liquid suction valve, by controlling the on-off situation of the pressure medium flow in the housing 11, the suction of the target solution can be controlled. Moreover, the suction amount of the target solution is also a quantitative suction, which is convenient for controlling the suction amount of the target solution.

[0059] Although the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be broadly construed within the spirit and scope defined by the appended claims. Therefore, all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A quantitative liquid suction valve, characterized in that, For sucking a target solution, including: A housing provided with a pressure chamber, one end of the pressure chamber being open, the housing further having a first liquid inlet and a first liquid outlet communicating with the pressure chamber, the first liquid inlet being used for inputting a pressure medium flow, and the first liquid outlet being used for outputting the pressure medium flow; A valve plate hermetically disposed at the opening of the pressure chamber, the valve plate having a deformation portion that elastically deforms due to a pressure change in the pressure chamber, causing the deformation portion to protrude towards or away from the pressure chamber; An upper cover provided with a liquid storage chamber, the upper cover hermetically covering the housing and hermetically connected to the valve plate, the liquid storage chamber having a second liquid inlet and a second liquid outlet, the second liquid inlet being used for sucking the target solution, and the second liquid outlet being used for discharging the sucked target solution; An elastic member elastically limited between the valve plate and the upper cover, the deformation movement of the valve plate driving the elastic member to elastically deform, and when the valve plate restores elastic deformation, the elastic member resets to drive the valve plate to move; When the deformation portion protrudes towards the pressure chamber, the target solution is sucked into the liquid storage chamber from the second liquid inlet, the valve plate elastically deforms to squeeze the liquid storage chamber, the target solution is discharged from the second liquid outlet of the liquid storage chamber, the valve plate and the elastic member restore elastic deformation, the valve plate deforms in the reverse direction to expand the liquid storage chamber, and the target solution enters the liquid storage chamber from the second liquid inlet.

2. The quantitative liquid suction valve according to claim 1, characterized in that, The upper cover protrudes upwardly to form a receiving chamber, one end of the elastic member being received in the receiving chamber, and the other end of the elastic member being fixedly connected to the valve plate.

3. The quantitative liquid suction valve according to claim 2, characterized in that, It further includes a connecting rod, the connecting rod including a rod body and a fixing disk provided at one end of the rod body, the rod body being received in the receiving chamber, the fixing disk being fixedly connected to the valve plate, and the protrusion or depression of the valve plate towards the liquid storage chamber driving the connecting rod to move up and down and causing the elastic member to expand and contract.

4. The quantitative liquid suction valve according to claim 1, characterized in that The valve plate is circular, and the deformation portion is in a trumpet shape.

5. The quantitative liquid suction valve according to claim 1, wherein A flange is provided on a side surface of the valve plate facing the housing, and an annular groove is provided on the outer peripheral edge of the top end of the housing, and the flange is received in the annular groove.

6. The quantitative liquid suction valve according to claim 1, characterized in that, An annular rib is further provided at the pressing portion of the upper cover and the valve plate, and the annular rib presses on the valve plate to hermetically connect the upper cover and the valve plate.

7. The quantitative liquid suction valve according to claim 1, characterized in that, A liquid inlet check valve is provided at the second liquid inlet, and a liquid outlet check valve is provided at the second liquid outlet.

8. The quantitative liquid suction valve according to claim 1, characterized in that, The housing and the upper cover are snap-fitted.

9. The quantitative liquid suction valve according to claim 1, characterized in that, A step portion is provided on the inner side wall of the first liquid outlet, and the step portion protrudes towards the inside of the first liquid outlet.

10. The quantitative liquid suction valve according to claim 1, characterized in that, The second liquid inlet and the second liquid outlet of the housing are also provided with connectors, and the shape of the connectors includes a large head end and a small head end, the large head end being fixedly connected to the housing and communicating with the liquid storage chamber.

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