A diaphragm pump

Abstract

This invention discloses a diaphragm pump, comprising an inlet / outlet end, a flow channel layer, a diaphragm, a cantilever, a transmission mechanism, and a power mechanism. The flow channel layer is located below the inlet / outlet end and contains fluid channels. The diaphragm is located below the flow channel layer and connected to the cantilever. The cantilever is connected to the transmission mechanism, which is also connected to the power mechanism. At least four diaphragm positions are provided on the flow channel layer, with one diaphragm corresponding to each position. The flow channel layer includes at least two flow channels, each isolated from the others. The inlet / outlet end has at least two inlets and at least two outlets. The two ends of each flow channel connect to the inlet and outlet. Each flow channel connects to two diaphragm positions, and each diaphragm position connects to its corresponding inlet and outlet. The diaphragm positions connected to the same flow channel are centrally symmetrically arranged on the flow channel layer. This invention's diaphragm pump achieves the technical effect of multi-fluid operation and stable flow rate.

Description

Technical Field

[0001] This invention relates to the technical field of pump equipment, and more particularly to a diaphragm pump. Background Technology

[0002] Small household pumps are commonly used in the water supply and dispensing systems of small appliances such as electric irons, coffee makers, and cleaning machines. Existing diaphragm pumps rarely achieve dual-fluid or multi-fluid transport with a single pump body, and ensuring stable flow rates while achieving multi-fluid transport is the biggest challenge. Therefore, how to achieve multi-fluid transport while ensuring stable flow rates for each fluid has become a technical problem that researchers in this field are studying and solving. Summary of the Invention

[0003] The purpose of this invention is to provide a diaphragm pump to solve the technical problem of multi-fluid transportation with stable flow rate.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a diaphragm pump is provided, including an inlet / outlet end, a flow channel layer, a diaphragm, a cantilever, a transmission mechanism, and a power mechanism. A flow channel layer is provided below the inlet / outlet end, and a fluid channel is provided within the flow channel layer. A diaphragm is provided below the flow channel layer and is connected to the cantilever. The cantilever is connected to the transmission mechanism, and the transmission mechanism is connected to the power mechanism. At least four diaphragm positions are provided on the flow channel layer, and each diaphragm position corresponds to one diaphragm. The flow channel layer includes at least two flow channels, and each flow channel is isolated from each other. The inlet / outlet end is provided with at least two inlets and at least two outlets. The two ends of each flow channel connect to the inlets and outlets. Each flow channel connects to two diaphragm positions, and the flow channel communicates with the corresponding diaphragm through each diaphragm position. Each diaphragm position is respectively connected to the corresponding inlet and outlet. The diaphragm positions connected to the same flow channel are centrally symmetrically arranged on the flow channel layer.

[0005] The diaphragm pump of this invention, by setting multiple flow channels that are isolated from each other, enables the delivery of multiple fluids through a single pump body; at the same time, the same fluid is delivered alternately through two diaphragms, making the control of each fluid more precise and the flow rate more stable; and the diaphragms controlling the same fluid are symmetrically arranged in the center, so that the feedback pressure of one fluid only affects itself and does not affect other fluids. In particular, when a diaphragm is blocked or slightly blocked, it will only have a slight impact on the same fluid at the symmetrical position, without affecting the force on other diaphragms and fluids, thereby enabling better and more precise control of the flow rate of multiple fluids and improving the flow stability of multiple fluids.

[0006] Preferably, a first protrusion is provided in the middle of the cantilever, which abuts against the lower surface of the flow channel layer. The first protrusion can balance the force of each diaphragm on the cantilever, ensuring stable movement of the cantilever and preventing unintended swaying of the cantilever as a whole due to the stress of a certain diaphragm, which would affect the flow rate of other fluids.

[0007] Preferably, the lower surface of the aforementioned flow channel layer is provided with a second protrusion, which abuts against the upper surface of the cantilever. This second protrusion helps stabilize the cantilever's posture during movement, preventing the stress of the diaphragm from affecting the cantilever's movement posture and thus affecting the flow control of the fluid.

[0008] More preferably, the aforementioned transmission mechanism includes a transmission wheel, with the cantilever's shaft eccentrically positioned and connected to the transmission wheel at this eccentric location. The cantilever performs a non-rotational oscillating motion on the transmission wheel, simultaneously controlling the diaphragm's periodic up-and-down reciprocating motion. The transmission wheel controls the cantilever's reciprocating oscillation through rotation. The eccentric connection between the cantilever's shaft and the transmission wheel easily converts rotational motion into reciprocating motion, resulting in high power transmission efficiency and excellent control over the cantilever's oscillation amplitude and the diaphragm's reciprocating stroke, thus improving the accuracy of flow control.

[0009] More preferably, the vertical height from the point where the middle part of the cantilever contacts the lower surface of the flow channel layer to the position where the cantilever's shaft connects to the drive wheel is h; the distance from the point where the drive wheel connects to the cantilever's shaft to the center of the drive wheel's axis is R; the distance from the center of the diaphragm to the center of the cantilever's axis is L; and the diaphragm's extension / retraction stroke is S, where h satisfies: .

[0010] By controlling the contact position between the cantilever and the flow channel layer, the movement of the cantilever is made more stable, preventing the cantilever from swinging too much and becoming unstable during movement, which would make the flow rate difficult to control.

[0011] More preferably, L is greater than R. L being greater than R means that the arm length of the cantilever is greater than the eccentric radius of the cantilever itself, which helps to increase the stroke of the diaphragm, thereby increasing the fluid delivery rate and allowing for better control.

[0012] Preferably, the flow channel layer is provided with one-way valves, with two one-way valves in each diaphragm position. The flow directions of the two one-way valves are opposite, and the one-way valves are located between the flow channel and the diaphragm. Through these two one-way valves, the liquid inside the diaphragm can flow from the inlet channel of the flow channel to the inside of the diaphragm and then from the inside of the diaphragm to the outlet channel of the flow channel as the diaphragm reciprocates, preventing liquid backflow during the movement of the diaphragm.

[0013] Preferably, the cantilever is provided with a plurality of diaphragm fixing positions, each fixing position fixing one diaphragm, and the plurality of diaphragm fixing positions are symmetrically arranged along the center of the cantilever axis. The diaphragm is fixed at the center symmetrical position of the cantilever, so that the symmetrical diaphragms are subjected to balanced forces, which is less likely to disturb the movement of the cantilever and cause the cantilever to wobble unpredictably, thus causing problems with flow control.

[0014] Preferably, the inlet and outlet connected to the same flow channel are arranged adjacent to each other. This adjacent arrangement of the inlet and outlet ensures that the design of multiple flow channels does not overlap in the same plane as much as possible, preventing the need to increase the number of flow channel layers, which would lead to an increase in the thickness of the flow channel layers; moreover, the flow channel is relatively simple, the fluid flow path is relatively short, and the fluid flow resistance is relatively small.

[0015] Preferably, the flow channel layer further includes a fixing frame, which is fixed below the flow channel layer and is used to fix the diaphragm or cantilever. Fixing the diaphragm with the fixing frame or directly fixing the cantilever ensures that the cantilever will not rotate, allowing for better oscillating reciprocating motion, avoiding torque on the diaphragm, affecting the diaphragm's motion state, or even causing diaphragm aging and damage. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] in: Figure 1 This is a cross-sectional view of the diaphragm pump 100 according to Embodiment 1; Figure 2 This is an exploded structural diagram of the diaphragm pump 100 according to Embodiment 1; Figure 3 This is a top view of the flow channel layer 120 of the diaphragm pump 100 in Embodiment 1. Figure 4 This is a top view structural diagram of the cantilever 140 of the diaphragm pump 100 in Embodiment 1. Figure 5 This is a partial structural schematic diagram of the diaphragm pump 100 in Embodiment 1; Figure 6 This is a cross-sectional view of the diaphragm pump 200 in Embodiment 2; The labels for the attached figures are as follows: 100, 200 - Diaphragm pump; 110, 210 - Inlet / outlet; 111 - First fluid inlet; 112 - First fluid outlet; 113 - Second fluid inlet; 114 - Second fluid outlet; 120, 220 - Flow channel layer; 121 - Fixing frame; 122 - Diaphragm position; 123 - First fluid outlet flow channel; 124 - First fluid inlet flow channel; 11 - First fluid inlet position; 12 - First fluid outlet position; 125 - Second fluid inlet flow channel; 126 - Second fluid outlet flow channel; 13 - Second fluid inlet position; 14 - Second fluid outlet flow channel; Body outlet position; 227 - second protrusion; 130, 230 - diaphragm; 140, 240 - cantilever; 141 - first protrusion; 142 - shaft; 143 - diaphragm fixing position; 150, 250 - transmission gear; 160, 260 - motor; 170, 270 - base; 180 - one-way valve; 181 - inlet valve; 182 - outlet valve; L - distance from diaphragm center to cantilever shaft center; S - diaphragm travel stroke; R - distance from shaft to transmission gear connection point to transmission gear axis; h - height from protrusion apex to transmission gear to shaft connection point. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0020] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] Example 1: like Figures 1-5 As shown, Figure 1 This is a cross-sectional view of the diaphragm pump 100 according to Embodiment 1 of the present invention. Figure 2 This is an exploded structural diagram of the diaphragm pump 100 according to Embodiment 1 of the present invention; Figure 3 This is a top view of the flow channel layer 120 of the diaphragm pump 100 according to Embodiment 1 of the present invention. Figure 4 This is a top view structural diagram of the cantilever 140 of the diaphragm pump 100 according to Embodiment 1 of the present invention. Figure 5 This is a partial structural schematic diagram of the diaphragm pump 100 according to Embodiment 1 of the present invention.

[0023] This embodiment discloses a diaphragm pump 100, including an inlet / outlet end 110, a flow channel layer 120, diaphragms 130, a cantilever 140, a transmission gear 150, and a motor 160. The inlet / outlet end 110 is located at the top and is responsible for the inlet and outlet of fluid. The flow channel layer 120 is fixed below the inlet / outlet end 110 and is responsible for fluid transport. The flow channel layer 120 connects to four diaphragms 130, which provide the transport power to the fluid. The diaphragms 130 are fixed to the cantilever 140, which provides the power for the extension and retraction of the diaphragms 130. The cantilever 140 is driven by the transmission gear 150, and the cantilever 140 performs a non-rotational oscillating motion on the transmission gear 150. The transmission gear 150 is fixed to the shaft of the motor 160 and rotates as the shaft of the motor 160 rotates.

[0024] The inlet / outlet 110 is provided with two inlets and two outlets, namely a first fluid inlet 111, a first fluid outlet 112, a second fluid inlet 113, and a second fluid outlet 114. The first fluid inlet 111 and the first fluid outlet 112 are arranged adjacent to each other, and the second fluid inlet 113 and the second fluid outlet 114 are arranged adjacent to each other. The four inlets and outlets are arranged side by side in a straight line.

[0025] Below the flow channel layer 120, a fixing frame 121 is also included, which is used to fix the position of the diaphragm 130. Four diaphragm positions 122 are provided on the flow channel layer 120, respectively arranged in the four directions of the flow channel layer 120, and arrayed within the flow channel layer 120. Each diaphragm position 122 communicates with the inner cavity of the diaphragm 130. Each diaphragm position 122 is provided with two one-way valves 180, which allow fluid flow in opposite directions; the two one-way valves are an inlet valve 181 and an outlet valve 182. The diaphragm position 122 communicates with the inner cavity of the diaphragm 130 through the one-way valves 180. The diaphragm 130 is sealed to the lower surface of the flow channel layer 120. The inlet valve 181 allows fluid from the flow channel layer 120 to flow into the inner cavity of the diaphragm 130, but does not allow it to flow out of the diaphragm 130. The outlet valve 182 allows fluid from the inner cavity of the diaphragm 130 to flow out, but does not allow it to flow back into the diaphragm 130. The flow channels containing the inlet valve 181 and outlet valve 182 at the same diaphragm position 122 are isolated from each other within the flow channel layer 120. The flow channel layer 120 includes two flow channels: the first fluid flow channel includes a first fluid outlet flow channel 123 and a first fluid inlet flow channel 124; the second fluid flow channel includes a second fluid inlet flow channel 125 and a second fluid outlet flow channel 126. One end of the first fluid inlet channel 124 is connected to the first fluid inlet 111 via the first fluid inlet position 11, and the other end branches to connect to the inlet valves 181 in the two diaphragm positions 122 of the corresponding first fluid channel. One end of the first fluid outlet channel 123 is connected to the first fluid outlet 112 via the first fluid outlet position 12, and the other end branches to connect to the outlet valves 182 in the two diaphragm positions 122 of the corresponding first fluid channel. One end of the second fluid inlet channel 125 is connected to the second fluid inlet 113 via the second fluid inlet position 13, and the other end branches to connect to the inlet valves 181 in the two diaphragm positions 122 of the corresponding second fluid channel. One end of the second fluid outlet channel 126 is connected to the second fluid outlet 114 via the second fluid outlet position 14, and the other end branches to connect to the outlet valves 182 in the two diaphragm positions 122 of the corresponding second fluid channel. Figure 3 As shown, the flow direction of each fluid is as follows: Figure 3As indicated by the dashed arrow, the first fluid in this embodiment is air. Air enters through the first fluid inlet 111 and flows through the first fluid inlet channel 124 to two diaphragm positions 122. These two diaphragm positions 122 are centrally symmetrically distributed in the channel layer 120 when viewed from above. As the two diaphragms 130 alternately pull down, the inlet valve 181 opens alternately, and the outlet valve 182 closes alternately. Air is drawn into the diaphragm 130 from the first fluid inlet channel 124 through the inlet valve 181. As the two diaphragms 130 alternately contract, the outlet valve 182 opens alternately, and the inlet valve 181 closes alternately. Air is pushed from the diaphragm 130 into the first fluid outlet channel 123 through the outlet valve 182 and ejected through the first fluid outlet 112. The second fluid in this embodiment is a liquid, such as water. The flow process of the liquid is similar to that of the first fluid and will not be described further.

[0026] The diaphragm 130 is fixed in position by the fixing bracket 121 to prevent the diaphragm 130 from being twisted or rotated. Four diaphragm fixing positions 143 are provided on the cantilever 140, and the four diaphragms 130 are respectively fixed on the four diaphragm fixing positions 143. The cantilever 140 has an X-shaped top view, and the diaphragms 130 and diaphragm fixing positions 143 are centrally symmetrically distributed on the cantilever 140. A first protrusion 141 is provided on the upper surface of the cantilever 140, and the top of the first protrusion 141 abuts against the lower surface of the flow channel layer 120. A shaft 142 is provided below the cantilever 140, and the shaft 142 connects to the lower transmission gear 150. The point where the shaft 142 connects to the transmission gear 150 is located at an eccentric position on the transmission gear 150, where the eccentricity distance is R. The distance from the center of the cantilever 140 to the center of the diaphragm 130 is L, the extension stroke of the diaphragm 130 is S, and the height from the apex of the first protrusion 141 to the upper surface of the transmission gear 150 is h, where h satisfies: .

[0027] In this embodiment, S is 5mm, R is 2mm, and L is 15mm, so h is 11.8mm. When h is 11.8mm, the swing of the cantilever 140 can basically revolve around a single point, and the swing state is stable and not easily deviated. In other embodiments, S can also be 8mm or 10mm, R can also be 3mm or 5mm, and L can also be 18mm or 20mm.

[0028] The transmission gear 150 is fixed on the shaft of the motor 160 and rotates with the shaft of the motor 160. The motor 160 provides power to the transmission gear 150 and the subsequent diaphragm 130. The motor 160 is fixed on the base 170, which is fixed to the flow channel layer 120 and the inlet / outlet end 110.

[0029] The diaphragm pump 100 in this embodiment can simultaneously transport gas and liquid through the flow channel arrangement within the flow channel layer 120; through the cooperation of the diaphragm 130 and the cantilever 140, the two fluids will not interfere with each other during transport; and the cantilever 140 swings stably, providing the possibility of precise control over the flow rate of both gas and liquid.

[0030] Example 2: like Figure 6 The diagram shown is a cross-sectional view of the diaphragm pump 200 according to Embodiment 2 of the present invention.

[0031] This embodiment discloses a diaphragm pump 200, which has a structure that is basically the same as the diaphragm pump 100 in Embodiment 1 of the present invention, with the following differences.

[0032] The diaphragm pump 200 of this embodiment includes an inlet / outlet end 210, a flow channel layer 220, diaphragms 230, a cantilever 240, a transmission gear 250, a motor 260, and a base 270. The flow channel layer 220 is fixed below the inlet / outlet end 210. Four diaphragms 230 are sealed and fixed below the flow channel layer 220. The diaphragms 230 are fixed to the cantilever 240, which is connected to the transmission gear 250. The transmission gear 250 is fixed to the motor 260. The inlet / outlet end 210 and the flow channel layer 220 are fixed to the base 270, and the motor 260 is fixed to the base 270.

[0033] The lower surface of the flow channel layer 220 is provided with a second protrusion 227, which protrudes downward and abuts against the upper surface of the center of the cantilever 240.

[0034] The diaphragm pump 200 of this embodiment has the same technical effects as the diaphragm pump 100 of Embodiment 1 of the present invention.

[0035] The above description discloses only preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A diaphragm pump, comprising an inlet / outlet end, a flow channel layer, a diaphragm, a cantilever, a transmission mechanism, and a power mechanism. The flow channel layer is disposed below the inlet / outlet end, and a fluid channel is disposed within the flow channel layer. A diaphragm is disposed below the flow channel layer, and the diaphragm is connected to the cantilever. The cantilever is drivenly connected to the transmission mechanism, and the transmission mechanism is drivenly connected to the power mechanism. At least four diaphragm positions are disposed on the flow channel layer, and each diaphragm position corresponds to one diaphragm. The flow channel layer includes at least two flow channels, each flow channel being isolated from the others. The inlet / outlet end is provided with at least two inlets and at least two outlets. The two ends of each flow channel connect to the inlets and outlets. Each flow channel connects to two diaphragm positions, and the flow channel communicates with the corresponding diaphragm through each diaphragm position. Each diaphragm position is respectively connected to the corresponding inlet and outlet. The diaphragm positions connected to the same flow channel are centrally symmetrically arranged on the flow channel layer.

2. The diaphragm pump according to claim 1, characterized in that, A first protrusion is provided in the middle of the cantilever, and the first protrusion abuts against the lower surface of the flow channel layer.

3. The diaphragm pump according to claim 1, characterized in that, The lower surface of the flow channel layer is provided with a second protrusion, which abuts against the upper surface of the cantilever.

4. The diaphragm pump according to claim 2 or 3, characterized in that, The transmission mechanism includes a transmission wheel, and the shaft of the cantilever is eccentrically positioned, with the shaft of the cantilever being connected to the transmission wheel at the eccentric position.

5. The diaphragm pump according to claim 4, characterized in that, The vertical height from the point where the middle of the cantilever contacts the lower surface of the flow channel layer to the position where the cantilever's axis connects to the drive wheel is h; the distance from the point where the drive wheel connects to the cantilever's axis to the center of the drive wheel's axis is R; the distance from the center of the diaphragm to the center of the cantilever's axis is L; and the extension / retraction stroke of the diaphragm is S, where h satisfies: 。 6. The diaphragm pump according to claim 5, characterized in that, L is greater than R.

7. The diaphragm pump according to claim 1, characterized in that, The flow channel layer is provided with a one-way valve, and two one-way valves are provided in each diaphragm position. The flow directions of the two one-way valves are opposite, and the one-way valves are located between the flow channel and the diaphragm.

8. The diaphragm pump according to claim 1, characterized in that, The cantilever is provided with a plurality of diaphragm fixing positions, each of which fixes one diaphragm, and the plurality of diaphragm fixing positions are symmetrically arranged along the center of the cantilever axis.

9. The diaphragm pump according to claim 1, characterized in that, The inlet and outlet connected to the same flow channel are arranged adjacent to each other.

10. The diaphragm pump according to claim 1, characterized in that, The flow channel layer also includes a fixing frame, which is fixed below the flow channel layer and is used to fix the diaphragm or cantilever.

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