Fluid jet device and dispensing equipment

Abstract

The utility model discloses a fluid jet device and dispensing equipment, the fluid jet device comprises a valve casing, a piezoelectric ceramic actuator and a gas circuit connecting structure, and a power cavity is formed in the valve casing; the piezoelectric ceramic actuator is arranged in the power cavity; wherein the cavity wall of the lower end of the power cavity is provided with an air inlet, the air inlet is used for introducing cooling air into the power cavity, the cavity wall of the upper end of the power cavity is provided with an air outlet, and the air outlet is used for discharging air after heat exchange is completed. According to the fluid jetting device, the chimney effect can be formed, so that the flow speed of cooling gas in the power cavity can be relatively higher, the cooling and heat dissipation effect on the piezoelectric ceramic actuator is improved, and the control precision of the fluid jetting device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection devices, in particular to a fluid injection device and glue dispensing equipment. Background Art

[0002] A piezoelectric fluid injection device is a type of fluid injection device that uses a piezoelectric ceramic actuator to drive the opening and closing parts to open or close the fluid injection port. Since the piezoelectric ceramic actuator, the core component that controls the opening and closing of the injection port, generates a large amount of heat during operation, in related technologies, the piezoelectric fluid injection device uses a method of introducing cooling gas into the installation chamber of the piezoelectric ceramic actuator to cool the piezoelectric ceramic actuator. However, due to the unreasonable design of the gas flow path, the heat dissipation effect is general. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a fluid injection device, which can effectively improve the heat dissipation effect of the piezoelectric ceramic actuator.

[0004] The utility model also provides a glue dispensing device having the fluid injection device.

[0005] According to the fluid injection device of the first aspect of the embodiment of the utility model, it includes a valve housing, a piezoelectric ceramic actuator and an air path connection structure, and a power chamber is formed inside the valve housing; the piezoelectric ceramic actuator is arranged in the power chamber; wherein, an air inlet is arranged on the lower end cavity wall of the power chamber, and the air inlet is used to introduce cooling gas into the power chamber, and an air outlet is arranged on the upper end cavity wall of the power chamber, and the air outlet is used to discharge the gas that has completed heat exchange.

[0006] The fluid injection device according to the first embodiment of the utility model has at least the following beneficial effects:

[0007] The fluid injection device of this embodiment arranges the air inlet on the lower cavity wall of the power cavity for installing the piezoelectric ceramic actuator, and arranges the air outlet on the upper cavity wall of the power cavity. When the cooling gas enters the fluid injection device, it will be able to flow into the power cavity from the lower end, and be discharged from the power cavity from the upper end after heat exchange with the piezoelectric ceramic actuator. Since the gas density after heat exchange is relatively small, it will naturally rise, thus forming a chimney effect, so that the flow rate of the cooling gas in the power cavity can also increase accordingly, thereby improving the cooling and heat dissipation effect of the piezoelectric ceramic actuator, and further improving the control accuracy of the fluid injection device.

[0008] According to the fluid injection device of some embodiments of the first aspect of the utility model, the air inlet and the air outlet are respectively located on both sides of the power chamber in the width direction.

[0009] According to the fluid injection device of some embodiments of the first aspect of the utility model, a gap is formed between the piezoelectric ceramic actuator and the cavity wall of the power cavity, and the gap can allow gas to flow from the side of the piezoelectric ceramic actuator close to the air inlet to the side of the piezoelectric ceramic actuator close to the air outlet.

[0010] According to the fluid injection device of some embodiments of the first aspect of the utility model, the fluid injection device also includes an air path connecting structure, the air path connecting structure is arranged on the outer surface of the valve shell, and includes an air intake connecting structure and an exhaust connecting structure, the air intake connecting structure is connected to the air inlet and is used to connect to the air inlet pipe, and the exhaust connecting structure is connected to the air outlet and is used to connect to the exhaust pipe.

[0011] According to the fluid injection device of some embodiments of the first aspect of the utility model, the air intake connection structure and the exhaust connection structure are located on the same side of the upper end of the valve housing, and an air intake channel and an air outlet channel are provided in the valve housing, the air intake channel connects the air intake connection structure and the air inlet, and the air outlet channel connects the exhaust connection structure and the air outlet.

[0012] According to some embodiments of the first aspect of the utility model, the fluid injection device also includes a stroke amplifier and a clamping bolt. The stroke amplifier is fixedly connected to the bottom wall of the power chamber, the clamping bolt is threadedly connected to the upper end of the valve housing, and one end extends into the power chamber and presses the piezoelectric ceramic actuator against the stroke amplifier.

[0013] According to the fluid injection device of some embodiments of the first aspect of the utility model, the head of the clamping bolt has an annular boss protruding toward one side of the valve housing, and the upper end of the valve housing is provided with an annular groove opposite to the annular boss. The annular boss is embedded in the annular groove and has an interference fit with the annular groove.

[0014] According to some embodiments of the first aspect of the utility model, the fluid injection device, the stroke amplifier includes a lever body and an elastic body, the lever body includes a rotating end, an amplifying end and a driving part, the rotating end and the amplifying end are located at opposite ends of the lever body, the driving part is located between the rotating end and the amplifying end, and abuts against the piezoelectric ceramic actuator; one end of the elastic body is fixedly connected to the bottom wall of the power chamber, and the other end is connected to the rotating end; when the driving part is subjected to a driving force, the elastic body can bend and deform so that the amplifying end can rotate around the rotating end to amplify the stroke of the amplifying end.

[0015] According to the fluid injection device of some embodiments of the first aspect of the utility model, the elastomer includes a compression spring part and a leaf spring part, the compression spring part is located on the side of the leaf spring part close to the enlarged end; the compression spring part includes a first fixed end and a first connecting end relative to each other, the first fixed end is fixedly arranged, and the first connecting end is connected to the rotating end; the leaf spring part includes a second fixed end and a second connecting end relative to each other, the second fixed end is fixedly arranged, and the second connecting end is connected to the rotating end.

[0016] According to some embodiments of the second aspect of the utility model, the dispensing equipment includes the fluid injection device of the above-mentioned embodiment of the first aspect.

[0017] The dispensing equipment according to some embodiments of the second aspect of the utility model has at least the following beneficial effects: by adopting the fluid injection device of the above-mentioned first aspect embodiment, the heat dissipation effect of the piezoelectric ceramic actuator in the fluid injection device can be improved, thereby improving the dispensing accuracy.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of a fluid injection device according to an embodiment of the utility model;

[0021] Figure 2 for Figure 1 A top view of the fluid ejection device shown;

[0022] Figure 3 For fluid injection systems Figure 2 The cross-sectional view in the AA direction shown in FIG.

[0023] Figure 4 for Figure 3 A schematic diagram of the structure of the shell body shown in one of the viewing angles;

[0024] Figure 5 for Figure 3 A schematic diagram of the structure of the shell body shown in another perspective;

[0025] Figure 6 for Figure 1 The structural schematic diagram of the travel amplifier is shown in.

[0026] Reference numerals:

[0027] Stroke amplifier 100; lever body 110; rotating end 111; amplifying end 112; second arc-shaped protrusion 1121; driving part 113; elastic body 120; compression spring part 121; first fixed end 1211; first connecting end 1212; leaf spring part 122; second fixed end 1221; second connecting end 1222; fixing part 130; valve housing 200; housing body 200a; power chamber 210; air inlet 211; air outlet 212; mounting groove 220; threaded hole 230; annular groove 240; injection member 300; injection port 310; liquid storage chamber 320; piezoelectric ceramic actuator 400; opening and closing member 500; connecting block 600; clamping bolt 700; annular boss 710; air path connecting structure 800; air intake connecting structure 810; exhaust connecting structure 820. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, left, right, front, back, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] The following is the attached Figure 1 To Attachment Figure 6 , describing the fluid injection device of the first embodiment of the utility model.

[0033] Reference Figures 1 to 5According to some embodiments of the present invention, the fluid injection device includes a valve body, a piezoelectric ceramic actuator 400 and an opening and closing member 500; wherein the valve body includes a valve housing 200 and an injection member 300, the injection member 300 is installed in the valve housing 200, and a liquid storage chamber 320 is formed inside, one end of the injection member 300 is exposed from the valve housing 200, and an injection port 310 is provided to spray the fluid (such as glue) in the liquid storage chamber 320; and the opening and closing member 500 is movably installed in the valve housing 200, and the opening and closing member 500 is partially located in the injection member 300 and partially located outside the injection member 300, the piezoelectric ceramic actuator 400 is also installed in the valve housing 200, and one end is transmission-connected to the part of the opening and closing member 500 located outside the injection member 300, so that the piezoelectric ceramic actuator 400 can drive The opening and closing member 500 is moved, thereby causing the opening and closing member 500 to open or close the injection port 310; in order to facilitate the installation of the piezoelectric ceramic actuator 400 in the valve housing 200, a power chamber 210 is formed inside the valve housing 200, and the piezoelectric ceramic actuator 400 is arranged in the power chamber 210; at the same time, in order to dissipate the heat of the piezoelectric ceramic actuator 400 in the power chamber 210, an air inlet 211 is arranged on the lower end cavity wall of the power chamber 210, and the air inlet 211 is used to connect to the external air supply device, so that cooling gas can be introduced into the power chamber 210 through the air inlet 211; an air outlet 212 for discharging the gas in the power chamber 210 is also arranged on the upper end cavity wall of the power chamber 210, so that the gas that has completed heat exchange and temperature rise with the piezoelectric ceramic actuator 400 can be discharged from the power chamber 210 through the air outlet 212.

[0034] It should be understood that the fluid injection device of this embodiment, by arranging the air inlet 211 on the lower cavity wall of the power cavity 210 for installing the piezoelectric ceramic actuator 400, and arranging the air outlet 212 on the upper cavity wall of the power cavity 210, when the cooling gas enters the fluid injection device through the air inlet 211, it will be able to flow into the power cavity 210 from the lower end, and be discharged from the power cavity 210 from the upper end after heat exchange with the piezoelectric ceramic actuator 400. Since the gas density after heat exchange is relatively small, it will naturally rise, thereby forming a chimney effect, so that the flow rate of the cooling gas in the power cavity 210 can also increase accordingly, thereby improving the cooling and heat dissipation effect of the piezoelectric ceramic actuator 400, so as to improve the control accuracy of the fluid injection device.

[0035] It can be understood that in some embodiments, the air inlet 211 and the air outlet 212 are respectively located on both sides of the power cavity 210 in the width direction, so that the air inlet 211 and the air outlet 212 can be respectively located on opposite sides of the piezoelectric ceramic actuator 400, so that the cooling gas can better exchange heat with the piezoelectric ceramic actuator 400 when flowing through the power cavity 210. For example, referring to Figures 1 to 5In one embodiment, the width direction of the power chamber 210 is the left-right direction, which is also the width direction of the valve housing 200, and the depth direction of the power chamber 210 is the front-back direction, which is also the thickness direction of the valve housing 200; wherein the piezoelectric ceramic actuator 400 is vertically installed in the middle area of ​​the left-right direction of the power chamber 210, and the air inlet 211 is arranged at the lower right corner of the power chamber 210, and the air outlet 212 is arranged at the upper left corner of the power chamber 210, so that the cooling gas can flow from the lower right corner of the power chamber 210 to the right side area of ​​the piezoelectric ceramic actuator 400, and after flowing through the piezoelectric ceramic actuator 400, it flows to the left side area of ​​the piezoelectric ceramic actuator 400, and finally flows out from the upper left corner of the power chamber 210, thereby improving the heat exchange effect.

[0036] It can be understood that, on the basis of some of the above-mentioned embodiments, in order to increase the flow rate of the cooling gas when it flows through the piezoelectric ceramic actuator 400, so as to achieve a heat exchange effect, a gap (not shown in the drawings) is formed between the piezoelectric ceramic actuator 400 and the cavity wall of the power cavity 210, and the gap forms a channel connecting the opposite sides of the piezoelectric ceramic actuator 400, so that the cooling gas can flow through the gap from the side of the piezoelectric ceramic actuator 400 close to the air inlet 211 to the side close to the air outlet 212, thereby reducing the wind resistance of the cooling gas when it flows through the piezoelectric ceramic actuator 400, so as to further increase the flow rate and enhance the heat exchange effect. For example, in one embodiment, in order to facilitate the placement of components such as the piezoelectric ceramic actuator 400 into the interior of the valve housing 200 during installation, the valve housing 200 includes a shell body 200a and a cover plate (not shown in the drawings), the power chamber 210 is arranged on the shell body 200a, and an opening is formed on the front side of the shell body 200a, and the cover plate is connected to the front side of the shell body 200a and covers the opening of the power chamber 210 to form a front cavity wall of the power chamber 210; and a gap is formed between the piezoelectric ceramic actuator 400 and the cover plate for connecting the left and right sides of the piezoelectric ceramic actuator 400, and the piezoelectric ceramic actuator 400 can be selectively installed on the rear cavity wall of the power cavity 210, that is, fit with the shell body 200a, so as to further enhance the heat dissipation effect of the piezoelectric ceramic actuator 400 with the help of the shell body 200a made of metal material with higher thermal conductivity.

[0037] It is understandable that, in order to facilitate the connection of an external gas pipeline, in some embodiments, reference is made to Figure 1The fluid injection device also includes an air path connecting structure 800, which is arranged on the outer surface of the valve housing 200 and includes an air intake connecting structure 810 and an exhaust connecting structure 820; wherein the air intake connecting structure 810 is connected to the air inlet 211 and is used to connect the air intake pipe, so as to pass the cooling gas supplied by the external air supply device into the power chamber 210 through the air intake pipe, the air intake connecting structure 810 and the air inlet 211; the exhaust connecting structure 820 is connected to the air outlet 212 and is used to connect the exhaust pipe, so as to discharge the gas that has completed heat exchange in the power chamber 210 through the air outlet 212, the exhaust connecting structure 820 and the air outlet pipe.

[0038] It can be understood that the fluid injection device generally further includes a glue barrel (not shown in the drawings) for supplying the fluid to be injected into the injection member 300 and a connecting block 600 for connecting the entire fluid injection device to the moving mechanism, and the glue barrel and the connecting block 600 are generally arranged on the side surfaces on both sides of the width direction of the valve housing 200. Therefore, in order to avoid interference between the external gas pipeline (such as the exhaust pipe and the intake pipe) and the glue barrel or the connecting block 600, refer to Figure 1 In some embodiments, the air intake connecting structure 810 and the exhaust connecting structure 820 are located on the same side of the upper end of the valve housing 200, so that the external gas pipeline can be connected to the air intake connecting structure 810 and the exhaust connecting structure 820 from the upper end of the valve housing 200. At the same time, in order to enable the air intake connecting structure 810 and the exhaust connecting structure 820 to be connected to the air inlet 211 and the air outlet 212 respectively, an air intake channel (not shown in the drawings) and an air outlet channel (not shown in the drawings) are also provided in the valve housing 200. The air intake channel connects the air intake connecting structure 810 and the air inlet 211, and the air outlet channel connects the exhaust connecting structure 820 and the air outlet 212.

[0039] It is understood that in one embodiment, referring to Figure 1 The air intake connection structure 810 and the exhaust connection structure 820 both use air pipe joints to connect the exhaust pipe and the air intake pipe; it should be understood that in some other embodiments, the air intake connection structure 810 and the exhaust connection structure 820 may also choose to use air intake holes and exhaust holes opened in the valve housing 200 and provided with internal threads to facilitate threaded connection with the pipe openings of the air intake pipe and the exhaust pipe.

[0040] It can be understood that, depending on the type of fluid to be injected and the amount of a single injection, the opening and closing member 500 is a striker slidably disposed in the valve housing 200, or a plunger slidably disposed in the valve housing 200. No specific limitation is made herein, as long as it can slide close to or away from the injection port 310 under the drive of the piezoelectric ceramic actuator 400 to complete the opening or closing of the injection port 310.

[0041] It is understandable that, since the driving stroke generated by the piezoelectric ceramic actuator 400 is small when it is working, in order to amplify the driving stroke so that the opening and closing member 500 can open and close the injection port 310 under the drive of the piezoelectric ceramic actuator 400, in some embodiments, reference is made to Figure 1 and Figure 6 The fluid injection device also includes a stroke amplifier 100, which is disposed in the power chamber 210 and has a driving portion 113 and an amplifying end 112 capable of achieving stroke amplification. The driving portion 113 abuts against the piezoelectric ceramic actuator 400, and the amplifying end 112 extends out of the power chamber 210 and is connected to the opening and closing member 500, so that when the piezoelectric ceramic actuator 400 is working, the driving portion 113 can transmit power and motion to the stroke amplifier 100, and the stroke amplifier 100 can transmit power and amplified motion to the opening and closing member 500. In addition, in order to achieve the installation and fixation of the piezoelectric ceramic actuator 400 in the power chamber 210, refer to Figure 3 The fluid injection device also includes a clamping bolt 700. The stroke amplifier 100 is fixedly connected to the bottom wall of the power chamber 210 and abuts against the lower end of the piezoelectric ceramic actuator 400 through the driving part 113. The clamping bolt 700 is threadedly connected to the upper end of the valve housing 200, and one end extends into the power chamber 210 and abuts against the upper end of the piezoelectric ceramic actuator 400, so that the piezoelectric ceramic actuator 400 can be pressed and abutted against the stroke amplifier 100 by tightening the clamping bolt 700.

[0042] At the same time, in order to prevent the clamping bolt 700 from loosening, in one embodiment, referring to Figure 3 and Figure 4 The head of the clamping bolt 700 has an annular boss 710 protruding toward one side of the valve body. The upper end of the valve housing 200 is provided with a threaded hole 230 and an annular groove 240. The threaded hole 230 is connected to the power chamber 210 and is used for threaded connection with the clamping bolt 700. The annular groove 240 surrounds the threaded hole 230 and is opposite to the annular boss 710. The annular boss 710 is embedded in the annular groove 240 and has an interference fit with the annular groove 240, so that a certain extrusion pressure is generated between the annular boss 710 and the inner wall of the annular groove 240, thereby increasing the limit of the static friction force that can be generated between the annular boss 710 and the inner wall of the annular groove 240, so as to prevent the clamping bolt 700 from loosening through the static friction force between the annular boss 710 and the inner wall of the annular groove 240.

[0043] It is understood that in some of these embodiments, reference Figure 1 and Figure 6The stroke amplifier 100 includes a lever body 110 and an elastic body 120 which are integrally connected to each other; wherein the lever body 110 is used to realize the amplification of the driving stroke, and includes a rotating end 111, an amplifying end 112 and a driving part 113; the rotating end 111 and the amplifying end 112 are located at opposite ends of the lever body 110, and the driving part 113 is located between the rotating end 111 and the amplifying end 112, and abuts against the piezoelectric ceramic actuator 400 to transmit the power and movement of the piezoelectric ceramic actuator 400 to the lever body 110; and One end of the elastic body 120 is fixedly connected to the bottom wall of the power chamber 210, and the other end is connected to the rotating end 111; the elastic body 120 is elastic, and when the driving part 113 is subjected to the driving force, the elastic body 120 can bend and deform under the action of the driving force and torque transmitted by the rotating end 111, so that the lever body 110 can rotate around the rotating end 111 connected to the elastic body 120, that is, the amplifying end 112 can rotate around the rotating end 111, so that the stroke of the amplifying end 112 can be several times that of the stroke of the driving part 113.

[0044] It should be understood that, compared with the stroke amplification mechanism formed by the mutual contact of the lever, the rotating shaft and the return spring in the related art, the stroke amplifier 100 in this embodiment is configured by setting the lever body 110 constituting the lever and the elastic body 120 constituting the return spring into an integrated structure, and the rotating end 111 located at one end of the lever body 110 is connected to the elastic body 120. With the bending deformation ability of the elastic body 120, the lever body 110 can be rotated around the rotating end 111 when the driving part 113 is subjected to the driving force, so that the stroke of the amplification end 112 can be amplified relative to the stroke of the driving part 113; and when the driving part 113 is removed, the stroke amplifier 100 can be amplified relative to the stroke of the driving part 113. After the driving force of part 113 is applied, since the elastic body 120 will restore its deformation under the action of its own elasticity, it can drive the lever body 110 to rotate in the opposite direction around the rotating end 111 to complete the reset; at the same time, since the elastic body 120 is connected to the lever body 110 as a whole, when the lever body 110 is reset and rotated to pass the origin position under the action of inertia, the elastic body 120 will be able to provide an elastic force to hinder the lever body 110 from continuing to rotate, so as to reduce the angle that the lever body 110 can pass the origin position, and also enable the lever body 110 to quickly return to the origin position again under the action of the elastic force of the elastic body 120, so as to better adapt to relatively high-frequency operations. Therefore, the stroke amplifier 100 in this embodiment not only has a small number of parts, low cost, and is easy to install, but also has a small number of transmission contact points during the transmission process (the integrated stroke amplifier 100 no longer has any contact points inside due to the integrated connection), which can reduce the influence of unstable factors caused by too many transmission contact points, and can also effectively improve the oscillation problem caused by the lever resetting beyond the origin, thereby improving the stroke accuracy of the transmission process from multiple aspects.

[0045] It is understandable that, in order to make the elastic body 120 bend and deform easily toward the side close to the enlarged end 112 when the driving portion 113 is subjected to the driving force, in some embodiments, referring to 1 and Figure 6 The elastic body 120 includes a compression spring portion 121 and a leaf spring portion 122, wherein the compression spring portion 121 is located on a side of the leaf spring portion 122 close to the enlarged end 112; wherein the compression spring portion 121 can be compressed under pressure, and the leaf spring portion 122 can be bent under torque; the compression spring portion 121 includes a first fixed end 1211 and a first connecting end 1212 opposite to each other, wherein the first fixed end 1211 is fixedly arranged, and the first connecting end 1212 is connected to the rotating end 111; the leaf spring portion 122 includes a second fixed end 1211 opposite to each other, and the first connecting end 1212 is connected to the rotating end 111; and the leaf spring portion 122 includes a second fixed end 1212 opposite to each other. 221 and the second connecting end 1222, the second fixed end 1221 is fixedly arranged, and the second connecting end 1222 is connected to the rotating end 111; it should be understood that by arranging the leaf spring portion 122 on one side of the compression spring portion 121, the two sides of the elastomer 120 can have different rigidities, so that the side of the elastomer 120 close to the enlargement end 112 is more easily compressed and deformed, that is, the elastomer 120 can bend as a whole toward the side close to the enlargement end 112 under the driving force and torque transmitted by the driving portion 113. Specifically, when the driving part 113 is subjected to the driving force, the rotating end 111 will apply a compressive force to the first connecting end 1212 of the compression spring part 121, and at the same time, will apply a bending moment to the second connecting end 1222 of the leaf spring part 122 toward the side of the driving part 113, so that the end of the elastic body 120 close to the enlarged end 112 can be compressed, while the side away from the enlarged end 112 is bent toward the enlarged end 112, that is, the elastic body 120 is bent and deformed as a whole toward the side close to the enlarged end 112, so that the enlarged end 112 is rotated by a certain angle equivalent to the rotating end 111; and when the driving force of the driving part 113 is removed, the compression spring part 121 stretches and recovers under its own elastic force, and the leaf spring part 122 straightens under its own elastic force, so that the lever body 110 rotates in the opposite direction to complete the reset.

[0046] It can be understood that in some embodiments, in order to facilitate the fixing of the first fixing end 1211 and the second fixing end 1221, the travel amplifier 100 includes a fixing portion 130, the first fixing end 1211 and the second fixing end 1221 are connected to the fixing portion 130, and are fixed to the bottom wall of the power chamber 210 through the fixing portion 130; for example, referring to FIG. Figure 6 In one embodiment, a mounting groove 220 is provided on the bottom wall of the power chamber 210 , and the fixing portion 130 is fixedly installed in the mounting groove 220 by interference fit to achieve fixation of the first fixing end 1211 and the second fixing end 1221 .

[0047] It should be understood that in some other embodiments, fasteners such as bolts may be selected to connect the fixing portion 130 to the valve housing 200, and the manner in which the fixing portion 130 is fixed to the valve housing 200 is not specifically limited herein.

[0048] The following describes a dispensing device according to an embodiment of the second aspect of the utility model, and the dispensing device according to this embodiment includes the fluid injection device according to the embodiment of the first aspect. It should be understood that the dispensing device according to this embodiment can improve the heat dissipation effect of the piezoelectric ceramic actuator 400 in the fluid injection device by adopting the fluid injection device according to the embodiment of the first aspect, thereby improving the dispensing accuracy.

[0049] It should be understood that in some of the embodiments, the dispensing equipment also includes a moving mechanism, and the fluid injection device is connected to the moving mechanism through the connecting block 600 on the valve housing 200, and can move under the drive of the moving mechanism, thereby driving the fluid injection device to move to a designated position for dispensing operations.

[0050] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A fluid ejection device, characterized in that: include: A valve housing having a power chamber formed therein; A piezoelectric ceramic actuator is disposed in the power cavity; in, An air inlet is provided on the lower cavity wall of the power cavity, and the air inlet is used to introduce cooling gas into the power cavity. An air outlet is provided on the upper cavity wall of the power cavity, and the air outlet is used to discharge the gas that has completed heat exchange.

2. A fluid injection device according to claim 1, characterized in that: The air inlet and the air outlet are respectively located on two sides of the power chamber in a width direction.

3. A fluid injection device according to claim 2, characterized in that: A gap is formed between the piezoelectric ceramic actuator and the cavity wall of the power cavity, and the gap can allow gas to flow from a side of the piezoelectric ceramic actuator close to the air inlet to a side of the piezoelectric ceramic actuator close to the air outlet.

4. A fluid injection device according to any one of claims 1 to 3, characterized in that: The fluid injection device also includes an air path connecting structure, which is arranged on the outer surface of the valve housing and includes an air intake connecting structure and an exhaust connecting structure. The air intake connecting structure is connected to the air inlet and is used to connect to the air inlet pipe, and the exhaust connecting structure is connected to the air outlet and is used to connect to the exhaust pipe.

5. A fluid injection device according to claim 4, characterized in that: The air intake connection structure and the air exhaust connection structure are located on the same side of the upper end of the valve housing, and an air intake channel and an air outlet channel are provided in the valve housing. The air intake channel connects the air intake connection structure and the air inlet, and the air outlet channel connects the air exhaust connection structure and the air outlet.

6. A fluid ejection device according to any one of claims 1 to 3, characterized in that: The fluid injection device also includes a stroke amplifier and a clamping bolt. The stroke amplifier is fixedly connected to the bottom wall of the power chamber. The clamping bolt is threadedly connected to the upper end of the valve housing, and one end extends into the power chamber to press the piezoelectric ceramic actuator against the stroke amplifier.

7. A fluid injection device according to claim 6, characterized in that: The head of the clamping bolt has an annular boss protruding toward one side of the valve housing, and the upper end of the valve housing is provided with an annular groove opposite to the annular boss. The annular boss is embedded in the annular groove and has an interference fit with the annular groove.

8. A fluid injection device according to claim 6, characterized in that: The travel amplifier includes a lever body and an elastic body connected to each other in an integral manner, the lever body includes a rotating end, an amplifying end and a driving part, the rotating end and the amplifying end are located at two opposite ends of the lever body, the driving part is located between the rotating end and the amplifying end, and abuts against the piezoelectric ceramic actuator; one end of the elastic body is fixedly connected to the bottom wall of the power chamber, and the other end is connected to the rotating end; When the driving portion is subjected to a driving force, the elastic body can be bent and deformed so that the enlarged end can rotate around the rotating end to enlarge the stroke of the enlarged end.

9. A fluid injection device according to claim 8, characterized in that: The elastic body includes a compression spring portion and a leaf spring portion, the compression spring portion is located on the side of the leaf spring portion close to the enlarged end; the compression spring portion includes a first fixed end and a first connecting end relative to each other, the first fixed end is fixedly arranged, and the first connecting end is connected to the rotating end; the leaf spring portion includes a second fixed end and a second connecting end relative to each other, the second fixed end is fixedly arranged, and the second connecting end is connected to the rotating end.

10. A dispensing device, characterized in that: The invention comprises a fluid ejection device as claimed in any one of claims 1 to 9.

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