Sheet type liquid delivery module based on resistance difference principle

Abstract

The present application relates to fluid delivery device technical field, especially to a kind of sheet type liquid delivery module based on resistance difference principle, comprising: device body, the flow channel for liquid flow is provided on the device body;Driving element, setting on the power cavity of device body and being used to change the volume of power cavity constantly;Wedge mechanism, which is connected and arranged on the flow channel, is in wedge or conical shape, so that the flow channel presents the state of one end wide and one end narrow locally;The flow channel in the both ends of the driving element is provided with wedge mechanism, and the driving element reciprocatingly changes flexibly during operation, and the volume of power cavity is changed constantly, since the resistance of wedge mechanism to liquid in two directions is different, the liquid in power cavity is extruded to flow out or inhaled, and the resistance of liquid in cavity to left flow channel or right flow channel is also different when liquid flows out or flows in, resistance difference is formed, and continuous unidirectional flow is formed in flow channel.

Description

Technical Field

[0001] This invention relates to the field of fluid transport device technology, and in particular to a thin-film liquid transport module based on the principle of resistance difference. Background Technology

[0002] Thin-film liquid delivery modules are an important type of fluid delivery device, and have been widely used in biomedicine, wearable devices, and portable electronic products in recent years. They have particularly proven effective in heat conduction and dissipation in small and localized heat-generating components, demonstrating promising market prospects. However, existing thin-film liquid delivery modules typically consist of a thin-film liquid delivery sheet with a liquid pump added on top. The pump drives the fluid within the sheet to flow through channels, thus achieving fluid delivery. This results in the module's thickness being the sum of the pump's thickness and the sheet's thickness, significantly exceeding the sheet's own thickness. This limits its application in areas with strict volume and thickness requirements. Therefore, developing and manufacturing thin-film liquid delivery modules with smaller thickness, simpler structure, and better flowability is of great significance. Summary of the Invention

[0003] The technical problem to be solved by this invention is: in order to solve the problems of large size and high noise of traditional air-cooling devices, and that external fluid devices are not suitable for the miniaturization trend of electronic products, a thin-film liquid delivery module based on the principle of resistance difference is provided.

[0004] The technical solution adopted by this invention to solve its technical problem is: a thin-film liquid conveying module based on the principle of resistance difference, comprising: The device body has a flow channel for liquid flow, and a power chamber is connected in series in the flow channel. The device body is composed of an upper film A, an intermediate clamping film C and a lower film B stacked in sequence. The intermediate clamping film C has multiple grooves of different shapes. The grooves, together with the upper film A and the lower film B, form the flow channel. The device body is generally sheet-shaped. The driving element is set on the power cavity of the device body and is used to continuously change the volume of the power cavity; And a wedge mechanism, which is disposed in the flow channel, the wedge mechanism is wedge-shaped or cone-shaped and makes the flow channel locally wide at one end and narrow at the other end, and a wedge mechanism is disposed in the flow channel at both ends of the driving element, and the wedge mechanisms in the flow channel at both ends of the driving element are arranged in the same direction; During operation, the driving element continuously changes the volume of the power chamber. When the liquid medium in the power chamber is flowed out or drawn in, the wedge mechanism creates a resistance difference between the liquid flowing out or drawn into one side of the flow channel and the liquid flowing out or drawn into the other side, thus achieving unidirectional flow of the liquid within the flow channel. Compared to existing technologies, this solution utilizes the different resistances of the wedge mechanism for the liquid flowing into and out of the power chamber. Therefore, when the liquid passes through a wedge mechanism placed on each side of a power chamber with a variable volume, it creates a resistance difference. Furthermore, as the volume of the power chamber repeatedly changes, it achieves unidirectional driving capability for the liquid within the flow channel, enabling liquid flow in narrow channels with a smaller volume and simpler structure.

[0005] In some preferred embodiments, the wedge mechanism includes a first transverse flow channel communicating with the flow channel. The first transverse flow channel is formed by transverse wedge blocks disposed within the width of the flow channel. Due to the presence of the transverse wedge blocks, the first transverse flow channel still has a resistance difference effect according to the above principle, and thus can form a unidirectional driving effect on the liquid under the action of the driving element, realizing macroscopic continuous flow of liquid in the flow channel.

[0006] In some preferred embodiments, there are at least two first transverse flow channels, which are respectively disposed at both ends of the power cavity, and the wedge angles of the first transverse flow channels at both ends are in the same direction.

[0007] In some preferred embodiments, the wedge mechanism includes a first longitudinal flow channel communicating with the flow channel, the first longitudinal flow channel being formed by a longitudinal wedge block disposed within the height of the flow channel. Due to the presence of the longitudinal wedge block, the first longitudinal flow channel still has a resistance difference effect according to the above principle, and thus can form a unidirectional driving effect on the liquid under the action of the driving element, realizing macroscopic continuous flow of liquid in the flow channel.

[0008] In some preferred embodiments, there are at least two first longitudinal flow channels, which are respectively disposed at both ends of the power cavity, and the wedge angles of the first longitudinal flow channels at both ends are in the same direction.

[0009] In some preferred embodiments, the wedge mechanism includes a second transverse flow channel communicating with the flow channel. The second transverse flow channel is formed by a transverse wedge block disposed within the width of the flow channel. A second longitudinal flow channel is disposed within the second transverse flow channel. The second longitudinal flow channel is formed by a longitudinal wedge block disposed within the height of the second transverse flow channel. The composite wedge flow channel is formed by the second transverse flow channel and the second longitudinal flow channel disposed within the second transverse flow channel. Based on the above principle, it still has a resistance difference effect, and therefore, under the action of the driving element, it can form a unidirectional driving effect on the liquid, realizing macroscopic continuous flow of the liquid within the flow channel.

[0010] In some preferred embodiments, there are at least two second transverse flow channels, which are respectively disposed at both ends of the power cavity, and the wedge angles of the second transverse flow channels at both ends are in the same direction. The second longitudinal flow channel is disposed in a one-to-one correspondence with the second transverse flow channel.

[0011] In some preferred embodiments, the driving element and the power cavity are provided in two sets, and the two sets of driving elements and power cavities are respectively arranged on the flow channel, and the wedge mechanism is arranged in the same direction in the flow channel at both ends of the two power cavities.

[0012] In some preferred embodiments, the width of the power cavity is greater than the width of the flow channel. This facilitates better driving performance for the driving element.

[0013] In some preferred embodiments, the flow channels are connected end-to-end to form a closed loop, enabling the liquid medium to circulate repeatedly within the closed loop.

[0014] The beneficial effects of this invention are as follows: Based on the principle of resistance difference, the thin-film liquid delivery module of this invention places the driving element on top of the power cavity and the wedge mechanism within the flow channels on both sides of the power cavity. While still achieving fluid flow, it also achieves advantages such as a lighter, thinner, and smaller size, a simpler structure, and lower manufacturing cost. It is one of the optimal construction methods for existing liquid flow driving devices within flat, narrow flow channels. Therefore, the thin-film liquid delivery module constructed in this way will have better market prospects and may find wider application in biomedicine, wearable devices, and portable electronic products. It is particularly suitable for heat dissipation in products such as mobile phones and laptops. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram illustrating the principle of the present invention; Figure 2 This is an exploded view of the structure of Embodiment 1 in this invention; Figure 3 This is a top view of Embodiment 1 of the present invention; Figure 4 This is a side view of Embodiment 1 of the present invention; Figure 5 yes Figure 3 Sectional view of AA; Figure 6 yes Figure 5 A magnified view of part C; Figure 7 yes Figure 4 BB section view; Figure 8 yes Figure 7 A magnified view of part D; Figure 9 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 10 This is a schematic diagram of the structure of Embodiment 3 of the present invention. Figure 1 ; Figure 11 This is a schematic diagram of the structure of Embodiment 3 of the present invention. Figure 2 ; Figure 12 This is a schematic diagram of the structure of Embodiment 4 of the present invention; Figure 13 This is a schematic diagram of the structure of Embodiment 5 of the present invention. Figure 1 ; Figure 14 This is a schematic diagram of the structure of Embodiment 5 of the present invention. Figure 2 ; Figure 15 This is a schematic diagram of the structure of Embodiment 6 of the present invention; Figure 16 This is a schematic diagram of the structure of Embodiment 7 of the present invention.

[0017] In the diagram: 1. Device body; 101. Flow channel; 102. Power chamber; 2. Driving components; 3. Wedge mechanism, 301, first transverse flow channel, 302, first longitudinal flow channel, 303, second transverse flow channel, 304, second longitudinal flow channel; 4. Horizontal wedge block; 5. Vertical wedge block. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the embodiments: This invention is not limited to the specific embodiments listed below. Those skilled in the art can implement this invention using various other specific embodiments based on the content disclosed herein. Any modifications or alterations made to the design structure and concept of this invention fall within the protection scope of this invention. It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Example 1, such as Figure 1-8 As shown, a thin-film liquid conveying module based on the principle of resistance difference includes a device body 1, a driving element 2, and a wedge mechanism 3. The device body 1 is provided with a flow channel 101 for liquid medium flow, a power chamber 102, and a wedge mechanism 3. The driving element 2 is located above the power chamber 102 of the device body 1 and is used to continuously change the volume of the power chamber 102. There are two wedge mechanisms 3, which are respectively located at both ends of the power chamber 102, and their wedge angle α is in the same direction along the flow channel. The width of the power chamber 102 is greater than the width of the flow channel 101. The wedge mechanisms 3 in the flow channel 101 at both ends of the driving element 2 are used to form a resistance difference when the liquid at both ends of the power chamber 102 flows out or is sucked into the power chamber 102 at the same time. In use, the flow channels 101 of the thin-film liquid conveying plate are connected end to end to form a closed loop of fluid, and the flow channels are filled with liquid. When the driving element 2 bends downward or upward, continuously changing the volume of the power chamber 102, based on the aforementioned principle of resistance difference, the fluid flows from the wedge mechanism 3 at the left end to the wedge mechanism 3 at the right end via the driving element 2. In this embodiment, the driving element 2 is a piezoelectric vibrator. Of course, in addition to a piezoelectric vibrator, the driving element 2 can also be a motor driving a cam. The cam repeatedly squeezes and releases the power chamber 102 to achieve continuous change in the volume of the power chamber 102. The driving element 2 can also be composed of other electromagnetic drives, magnetostrictive drives, shape memory alloy drives, and moving parts such as cams. In this embodiment, the fluid is cooling water.

[0022] The device body 1 is composed of an upper film A, an intermediate clamping film C, and a lower film B stacked sequentially. The intermediate clamping film C has multiple grooves of different shapes. The grooves, together with the upper film A and the lower film B, form a flow channel 101. The device body 1 is generally sheet-shaped. The first transverse flow channel 301 has transverse wedges 4 arranged on the width of the flow channel 101 to form a wedge mechanism 3. In this embodiment, one transverse wedge 4 is arranged on each side in the width direction, leaving a gap in the middle for fluid flow, forming a flat conical flared mouth. The transverse wedge 4 can be integrally formed with the thin film C, or it can be formed separately and then bonded to the inner side of the flow channel 101. The wedge angle α of the transverse wedge 4 is 2°~45°. Different angles result in different resistance differences, and the flow velocity and flow direction of the fluid are also different.

[0023] The thickness of the thin-film liquid delivery module formed by the above structure is usually 0.1~2.0mm, which is more than 1 / 3 less than the thickness of the original thin-film liquid delivery module of the liquid pump.

[0024] The principle upon which this solution is based is: (Refer to...) Figure 1When the flow channel 101 is filled with liquid, and the driving element 2 bends upward to increase the volume of the power chamber 102, liquid enters the power chamber 102 from the wedge mechanisms 3 at both ends. However, due to the different directions of the wedge angles relative to the fluid flow, the resistance to liquid flow is also different. More liquid enters the power chamber 102 through the left wedge mechanism 3, while less liquid enters the power chamber 102 through the right wedge mechanism 3. Conversely, when the driving element 2 bends downward to decrease the volume of the power chamber, liquid flows from the power chamber 102 from the wedge mechanism 3 at both ends. The fluid flows out through the wedge mechanisms 3 at both ends. For the same reason, less liquid flows out of the power chamber 102 through the left wedge mechanism 3, while more liquid flows out through the right wedge mechanism 3. Thus, within one cycle of the alternating size changes of the power chamber 102, a small portion of the liquid moves from the left wedge mechanism 3 to the right wedge mechanism 3. When the power chamber 102 continuously changes its volume under the action of the driving element 2, a pulsating flow of liquid from left to right is formed, macroscopically creating a unidirectional continuous flow of liquid. The wedge angle of the wedge mechanism 3 is an important factor affecting the fluid flow state, generally set between 2° and 75°. Different angles result in different resistance differences, and the fluid velocity and flow direction also differ. The wedge mechanisms 3 in the flow channel 101 can be placed facing forward or backward, but the wedge angles of the two wedge mechanisms 3 at both ends of the power chamber 102 must be placed in the same direction along the fluid flow channel.

[0025] Based on the above principle of resistance difference, the thin-film liquid delivery module of this solution places the driving element 2 on the power cavity 102 and the wedge mechanism 3 inside the flow channels 101 on both sides of the power cavity 102. While still achieving the same ability to drive fluid flow, it also achieves the advantages of being thinner, lighter, and smaller, having a simpler structure, and lower manufacturing cost. It is one of the optimal construction methods for existing liquid flow driving devices in flat and narrow flow channels. The thin-film liquid delivery module constructed in this way will have a better market prospect and may be more widely used in biomedicine, wearable devices, and portable electronic products. It is particularly suitable for heat dissipation of products such as mobile phones and laptops.

[0026] Example 2 differs from Example 1 in that Example 2 is an implementation of the wedge mechanism 3, specifically as follows: Figure 9 As shown, there are an even number of first transverse flow channels 301, which are evenly distributed at both ends of the power cavity 102. This is equivalent to a series connection of multiple first transverse flow channels 301, which can further increase the resistance difference effect.

[0027] Example 3 differs from Examples 1 or 2 in that Example 3 is an implementation of the wedge mechanism 3, specifically as follows: Figure 10-11As shown, the wedge mechanism 3 is a first longitudinal flow channel 302 connected to the flow channel 101. The first longitudinal flow channel 302 is formed by longitudinal wedge blocks 5 at the height of the flow channel 101. In this embodiment, multiple longitudinal wedge blocks 5 are provided on the lower side of the flow channel 101 in the height direction. The upper part of the flow channel 101 leaves a gap for fluid flow and is formed into a trapezoidal flared mouth. The longitudinal wedge blocks 5 can be integrally formed with film A or film B, or they can be formed separately and then bonded to one side of the flow channel 101. The wedge angle β of the longitudinal wedge block 5 is 2°~45°. Different angles result in different resistance differences, and the flow velocity and flow direction of the fluid are also different.

[0028] Example 4 differs from Examples 1, 2, or 3 in that Example 4 is an implementation of the wedge mechanism 3, specifically as follows: Figure 12 As shown, there are an even number of first longitudinal flow channels 302, which are evenly distributed at both ends of the power cavity 102. This is equivalent to the series connection of multiple first longitudinal flow channels 302, which can further increase the resistance difference effect.

[0029] Example 5 differs from Examples 1, 2, 3, or 4 in that Example 5 is another implementation of the wedge mechanism 3, while Example 3 is actually a combination of Examples 1 and 2, specifically as follows: Figure 13-14 As shown, the wedge mechanism 3 includes a second transverse flow channel 303 connected to the flow channel 101. The second transverse flow channel 303 is formed by transverse wedge blocks 4 disposed within the width of the flow channel 101. A second longitudinal flow channel 304 is disposed within the second transverse flow channel 303. The second longitudinal flow channel 304 is formed by longitudinal wedge blocks 5 disposed within the height of the second transverse flow channel 303, forming a flattened flared opening. This can further increase the resistance difference effect.

[0030] Example 6 differs from Examples 1, 2, 3, or 4 in that Example 6 is an implementation of the wedge mechanism 3, specifically as follows: Figure 15 As shown, there are an even number of wedge mechanisms 3, which are evenly distributed at both ends of the power cavity 102. This is equivalent to the series connection of multiple wedge mechanisms 3, which can further increase the resistance difference effect.

[0031] Example 7 differs from Examples 1, 2, 3, 4, 5, or 6 in that Example 7 is an implementation where two sets of wedge mechanisms 3 and driving elements 2 are provided on the flow channel 101. Specifically, as follows: Figure 16 As shown, there are two drive elements 2 and two power chambers 102, which are respectively arranged at the head and middle of the flow channel 101. Both ends of the two power chambers 102 are provided with wedge mechanisms 3 and are arranged in the same direction. They work through the coordinated cooperation of the internal fluid flow.

[0032] Example 8 differs from the previous examples in that: the driving element 2 and the power cavity 102 are each divided into two groups and respectively disposed at a certain part of the flow channel. One of the power cavities 102 uses the first transverse flow channel 301 at both ends, and the other power cavity 102 uses the first longitudinal flow channel 302 at both ends.

[0033] The above description, based on the preferred embodiments of the present invention, provides inspiration. Those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification but must be determined according to the claims.

Claims

1. A thin-film liquid conveying module based on the principle of resistance difference, characterized in that, include: The device body (1) is provided with a flow channel (101) for liquid flow, and a power chamber (102) is connected in series on the flow channel (101). The device body (1) is composed of an upper film A, an intermediate clamping film C and a lower film B stacked in sequence. The intermediate clamping film C has multiple grooves of different shapes. The grooves together with the upper film A and the lower film B form the flow channel (101). The device body (1) is generally thin-sheet type. A drive element (2) is disposed on the power cavity (102) of the device body (1) and is used to continuously change the volume of the power cavity (102); And a wedge mechanism (3) is provided in the flow channel (101). The wedge mechanism (3) is wedge-shaped or cone-shaped and makes the flow channel (101) partially wide at one end and narrow at the other end. The wedge mechanism (3) is provided in the flow channel (101) at both ends of the driving element (2). The wedge mechanisms (3) in the flow channel (101) at both ends of the driving element (2) are arranged in the same direction. During operation, the drive element (2) continuously changes the volume of the power chamber (102). When the liquid medium in the power chamber (102) is flowed out or sucked in, the wedge mechanism (3) makes the resistance of the liquid in the power chamber (102) flowing out or sucking in one side channel (101) different from that of the other side channel (101), thus forming a resistance difference and realizing the unidirectional flow of liquid in the channel (101). The wedge mechanism (3) includes a second transverse flow channel (303) communicating with the flow channel (101). The second transverse flow channel (303) is formed by a transverse wedge block (4) disposed within the width of the flow channel (101). A second longitudinal flow channel (304) is disposed within the second transverse flow channel (303). The second longitudinal flow channel (304) is formed by a longitudinal wedge block (5) disposed within the height of the second transverse flow channel (303).

2. The thin-film liquid conveying module based on the principle of resistance difference according to claim 1, characterized in that: There are at least two second transverse flow channels (303), which are respectively disposed at both ends of the power chamber (102), and the wedge angles of the second transverse flow channels (303) at both ends are in the same direction. The second longitudinal flow channel (304) is disposed in a one-to-one correspondence with the second transverse flow channel (303).

3. The thin-film liquid conveying module based on the resistance difference principle according to claim 1, characterized in that: The driving element (2) and the power cavity (102) are provided in two sets. The two sets of driving elements (2) and power cavities (102) are respectively arranged on the flow channel (101), and the wedge mechanism (3) is arranged in the same direction in the flow channel (101) at both ends of the two power cavities (102).

4. The thin-film liquid conveying module based on the principle of resistance difference according to claim 1, characterized in that: The width of the power chamber (102) is greater than the width of the flow channel (101).

5. The thin-film liquid conveying module based on the principle of resistance difference according to claim 1, characterized in that: The flow channel (101) is connected end to end to form a closed loop.

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