Film valve with pressure relief function

Abstract

The utility model provides a film valve with a pressure relief function, which comprises a spacer, the spacer is provided with a valve area and an air release area which penetrate through the upper end and the lower end of the spacer, the air release area is arranged beside the valve area, and the air release area is communicated with the valve area through a communication area; the number of the plates is two, the two plates are arranged on the upper side and the lower side of the distance piece respectively, corresponding first holes are vertically formed in the positions, located in the valve area, of the two plates in a penetrating mode respectively, and third holes are vertically formed in the positions, located in the air leakage area, of the plates in a penetrating mode; the valve is arranged between the distance piece and any plate, corresponding second holes are vertically formed in the positions, located in the valve area, of the valve and one plate in a penetrating mode, and the second holes deviate from the first holes. The pressure relief valve is simple and compact in overall structure, has air outlet and pressure relief functions, and can well save the internal space of application equipment, reduce the size of the equipment and reduce the cost.

Description

Technical Field

[0001] The utility model relates to the technical field of micro pumps, in particular to a film valve with pressure relief function. Background Art

[0002] Many portable electronic devices, such as some medical equipment, require relatively small pumps for delivering positive pressure or vacuum. In order to achieve the desired goals of small size, high frequency and silent operation, such pumps must operate at very high frequencies. In turn, valves must operate at very high frequencies to be effective, usually around 20kHz or higher.

[0003] Some diaphragm valves in the prior art can support operation at very high frequencies. Since pumps equipped with such valves are generally used in portable devices, such as portable blood pressure monitors, head-mounted massagers, etc., these devices generally need to have a pressure relief device at the same time, but the diaphragm valves in the prior art do not have a pressure relief function. Therefore, such devices also need to be separately equipped with a pressure relief valve, such as an independent solenoid valve, which ultimately causes the device to have disadvantages such as large size and high cost.

[0004] Therefore, there is an urgent need for a diaphragm valve with pressure relief function to solve some of the problems existing in the above-mentioned prior art. Utility Model Content

[0005] The utility model aims to provide a membrane valve with pressure relief function to solve the problem that the membrane valve in the prior art has no pressure relief function.

[0006] To achieve the above purpose, the utility model adopts the following technical solution: a membrane valve with pressure relief, comprising:

[0007] A spacer, wherein the spacer has a valve area and a gas leakage area penetrating the upper and lower ends thereof, wherein the gas leakage area is arranged beside the valve area, and the gas leakage area is connected with the valve area through the communication area;

[0008] Plates, two plates are provided, the two plates are respectively provided on the upper and lower sides of the spacer, the two plates are located in the valve area and vertically penetrate the corresponding first holes, and the plates are located in the air release area and vertically penetrate the third holes;

[0009] The valve is arranged between the spacer and any one of the plates, and the valve and one of the plates are respectively vertically penetrated at the position of the valve area to open a corresponding second hole, and the second hole is arranged away from the first hole.

[0010] Furthermore, two air leakage areas are provided, and the two air leakage areas are symmetrically arranged on the left and right sides of the valve area.

[0011] Furthermore, the area of ​​the air leakage region is smaller than the area of ​​the valve region.

[0012] Furthermore, a baffle is provided at the connection between the valve area and the air release area, and the communication area is located at the extension port side of the baffle.

[0013] Furthermore, two baffles are provided between the valve area and the air release area, the two baffles are relatively symmetrically arranged, and a communication area is formed between the relatively extending ports of the two baffles.

[0014] Furthermore, the area of ​​the baffle is larger than the area of ​​the connecting area.

[0015] Furthermore, the film valve is a square valve.

[0016] After adopting the above technical solution, compared with the existing technology, it has the following beneficial effects: the overall structure is simple and compact, and it has both air outlet and pressure relief functions. In some application scenarios, there is no need to set up a separate pressure relief valve, which can save the internal space of the application equipment, reduce the size of the equipment and reduce costs, and has great promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic structural diagram of the valve 4 of the utility model when it is arranged between the spacer 1 and the second plate 3;

[0019] Figure 2 It is a schematic diagram of the local structure of the valve 4 and the second plate 3 of the utility model when they are attached together;

[0020] Figure 3 It is a schematic diagram of the local structure of the valve 4 of the utility model when it is attached to the first plate 2;

[0021] Figure 4 It is a cross-sectional schematic diagram of the utility model when connected with the micro pump 8;

[0022] Figure 5 It corresponds to Figure 4 A magnified view of part A;

[0023] Figure 6 It is a schematic structural diagram of the valve 4 of the utility model when it is arranged between the spacer 1 and the first plate 2 .

[0024] Explanation of the accompanying drawings: 1. spacer; 11. baffle; 12. valve area; 13. venting area; 14. connecting area; 2. first plate; 3. second plate; 4. valve; 5. first hole; 6. second hole; 7. third hole; 8. micro pump; 81. venting hole; 82. outlet hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0026] In view of the problems existing in the prior art, the utility model provides a membrane valve with pressure relief function. The utility model is described in detail below in conjunction with the accompanying drawings.

[0027] Example 1

[0028] See also Figure 1-Figure 5 As shown, the technical solution adopted in this specific embodiment is: a membrane valve with pressure relief, including a spacer 1, a first plate 2, a second plate 3, and a valve 4. The spacer 1 has a hollow area that runs through its upper and lower ends in the longitudinal direction, and a baffle 11 extends horizontally in the hollow area to separate the hollow area into a valve area 12 and a gas relief area 13. The valve area 12 and the gas relief area 13 are connected through a connecting area 14. The first plate 2 and the second plate 3 are respectively arranged on the upper and lower sides of the spacer 1, and the first plate 2 and the second plate 3 are respectively vertically penetrated at the position of the valve area 12 to open a first hole 5, and the first hole 5 on the first plate 2 and the first hole 5 on the second plate 3 are arranged correspondingly.

[0029] The valve 4 is arranged between the second plate 3 and the spacer 1, and the second plate 3 and the valve 4 are respectively vertically penetrated by a second hole 6 at the position of the valve area 12, the second hole 6 on the second plate 3 corresponds to the second hole 6 on the valve 4, and the second hole 6 is arranged offset from the first hole 5.

[0030] It should be specifically explained that a third hole 7 is vertically penetrated through the second plate 3 at the position of the air release area 13. When working, the air outlet hole 82 of the micro pump 8, the second hole 6 on the second plate 3, the third hole 7, and the air release hole 81 of the micro pump 8 are connected in sequence to form a pressure relief channel.

[0031] Specifically, the communication area 14 is arranged at the extension port of the baffle 11, and the area of ​​the baffle 11 is larger than the area of ​​the communication area 14. Preferably, two baffles 11 are arranged between the valve area 12 and the air release area 13, and the two baffles 11 are relatively symmetrically arranged, and the communication area 14 is arranged between the relatively extended ports of the two baffles 11.

[0032] Preferably, the valve area 12 is arranged at the center of the spacer 1 , and its area is larger than that of the air leakage area 13 . The area of ​​the air leakage area 13 is about one fifth of that of the valve area 12 .

[0033] In addition, the valve area 12 may be a one-piece area or may be composed of multiple interconnected areas.

[0034] It should be specifically noted that two air leakage areas 13 can be provided, and the two air leakage areas 13 are symmetrically arranged at opposite sides of the valve area 12. In fact, the specific number of the air leakage areas 13 is not limited to one or two, and can be adjusted according to actual design requirements.

[0035] Specifically, the film valve is preferably a square structure to increase the working area and facilitate greater fluid pressure and flow.

[0036] Working principle: the membrane valve is installed inside the micro pump 8. When the actuator of the micro pump 8 is working, the vibration of the actuator can bring about changes in the air flow pressure in the cavity area. Synchronous with the input frequency, the membrane valve vibrates up and down at the same frequency under the changes in the air pressure on both sides. When the valve 4 is close to the second plate 3, the first hole 5 of the first plate 2 is connected to the second hole 6 of the second plate 3. At this time, the gas pressure in the pump cavity is greater than that in the airway, and the air pump is in an exhaust state; when the valve 4 is close to the first plate 2, the pressure in the airway is greater than that in the pump cavity, the valve is in a closed state, and the air pump is in a stopped pumping state; at this time, since the up and down vibration of the valve 4 is the same frequency and high frequency action as the actuator, the action time is very short. At this time, the action area of ​​the valve 4 only moves up and down in the middle area of ​​the spacer 1, and the third hole 7 is closed by the valve 4 and is always in a closed state;

[0037] When the actuator stops working, the pressure in the pump chamber is connected to the outside, and the pressure in the air outlet pipe is greater than that in the pump chamber for a long time. The valve 4 is not only close to the first plate 2 in the central area, but also in the peripheral air leakage hole 81 area, because the pressure in the air outlet pipe cannot be relieved, the gas will overflow to the outside area through the air outlet hole 82, making the valve 4 close to the first plate 2, thereby opening the third hole 7, and then realizing the opening of the air leakage hole 81, and the air pressure in the air outlet pipe is discharged through the air leakage hole 81;

[0038] When the actuator works again, the pressure in the pump chamber is greater than that in the air outlet pipe, and the valve 4 will resume closing the third hole 7 under the action of pressure and resume the high-frequency action air outlet state.

[0039] Example 2

[0040] See also Figure 6 As shown, the difference between this embodiment and embodiment 1 is that the valve 4 is arranged between the first plate 2 and the spacer 1. At this time, the first plate 2 is located in the pressure relief area 13 and vertically penetrates the third hole 7. When there is pressure on the end surface of the first plate 2, the valve 4 closes the third hole 7 on the first plate 2. The purpose of the third hole 7 on the first plate 7 is to use air pressure to push the valve 4 onto the second plate 3.

[0041] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A membrane valve with pressure relief, characterized in that: include: A spacer, wherein the spacer has a valve area and a gas leakage area penetrating the upper and lower ends thereof, wherein the gas leakage area is arranged beside the valve area, and the gas leakage area is connected with the valve area through the communication area; Plates, two plates are provided, the two plates are respectively provided on the upper and lower sides of the spacer, the two plates are located in the valve area and vertically penetrate the corresponding first holes, and the plates are located in the air release area and vertically penetrate the third holes; The valve is arranged between the spacer and any one of the plates, and the valve and one of the plates are respectively vertically penetrated at the position of the valve area to open a corresponding second hole, and the second hole is arranged away from the first hole.

2. The membrane valve with pressure relief according to claim 1, characterized in that: There are two air leakage areas, which are symmetrically arranged on the left and right sides of the valve area.

3. The membrane valve with pressure relief according to claim 1, characterized in that: The area of ​​the air leakage area is smaller than the area of ​​the valve area.

4. The membrane valve with pressure relief according to claim 1, characterized in that: A baffle is provided at the connection between the valve area and the air release area, and the communication area is located at the extension port side of the baffle.

5. The membrane valve with pressure relief according to claim 4, characterized in that: There are two baffles between the valve area and the air release area. The two baffles are relatively symmetrically arranged, and a communication area is formed between the relatively extended ports of the two baffles.

6. The membrane valve with pressure relief according to any one of claims 4 or 5, characterized in that: The area of ​​the baffle is larger than the area of ​​the connecting area.

7. The membrane valve with pressure relief according to claim 1, characterized in that: The film valve is a square valve.

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