Diaphragm pumps and water purifiers

Abstract

This application relates to a diaphragm pump and a water purifier. The diaphragm pump includes: a housing with an inlet; a one-way valve disposed inside the housing and having a discharge chamber and a suction chamber, the suction chamber communicating with the inlet; the one-way valve further having a drain hole for connecting the discharge chamber and the suction chamber; wherein the drain hole includes a first segment and a second segment connected together, the second segment extending radially along the one-way valve, and the first segment extending circumferentially along the one-way valve. A water purifier includes the aforementioned diaphragm pump. In the aforementioned diaphragm pump and water purifier, the drain hole is designed with a first segment and a second segment connected together, the first segment extending circumferentially along the one-way valve, which increases the opening area of ​​the drain hole within a limited space, effectively reducing eddy current generation and outlet water pressure, making the water flow from the drain hole smoother, and reducing the noise of water flow within the diaphragm pump.

Description

Technical Field

[0001] This application relates to the field of water purification equipment technology, and in particular to a diaphragm pump and a water purifier. Background Technology

[0002] During the process of purifying raw water in a water purifier, a diaphragm pump is used to provide a certain pressure to the raw water, enabling it to overcome the resistance of the reverse osmosis membrane and flow through it efficiently, thus achieving purification and filtration of the raw water through the reverse osmosis membrane.

[0003] During operation, existing diaphragm pumps generate vibrations due to motor operation, and due to unreasonable internal structural design, they are prone to generating friction noise and eddies in the water flow. These factors affect the pump's output flow rate and pressure, resulting in low operating efficiency. Summary of the Invention

[0004] Therefore, it is necessary to provide a diaphragm pump and water purifier to address the problems of frictional noise and eddy currents in existing diaphragm pumps.

[0005] A diaphragm pump, comprising:

[0006] The outer casing has a water inlet;

[0007] A one-way valve is provided inside the housing and has a discharge chamber and a suction chamber. The suction chamber is connected to the water inlet. The one-way valve is also provided with a drain hole for connecting the discharge chamber and the suction chamber.

[0008] The drain hole includes a first hole segment and a second hole segment, the second hole segment being connected to at least one end of the first hole segment, and the first hole segment extending along the circumferential direction of the one-way valve.

[0009] The diaphragm pump described above has a drain hole designed as a first hole section and a second hole section connected together. The first hole section extends along the circumference of the one-way valve, which can increase the opening area of ​​the drain hole in a limited space, effectively reduce the generation of eddies and the outlet water pressure, make the water flow line of the drain hole smoother, and reduce the water flow noise in the diaphragm pump.

[0010] In one embodiment, the opening width of the first hole segment is equal to the opening width of the second hole segment.

[0011] In one embodiment, the opening width of the first hole segment and the opening width of the second hole segment are both 0.3mm to 0.8mm.

[0012] In one embodiment, the first orifice is an arc-shaped orifice extending along the circumferential direction of the one-way valve, and the second orifice is a strip-shaped orifice extending along a first direction different from the circumferential direction of the one-way valve.

[0013] In one embodiment, the radius of the first hole segment is 1 mm to 3 mm.

[0014] In one embodiment, the angle between the tangent of the second hole segment and the tangent of the first hole segment is an acute angle or a right angle.

[0015] In one embodiment, the one-way valve has a plurality of drain holes, all of which are evenly distributed circumferentially around the center of the one-way valve.

[0016] In one embodiment, the check valve has at least two rings of drain holes in the radial direction, with the drain holes in every two adjacent rings being equally spaced in the radial direction of the check valve.

[0017] In one embodiment, the opening area of ​​each of the drain holes located in different rings gradually increases in the direction from the center of the one-way valve to the outer edge of the one-way valve.

[0018] In one embodiment, the one-way valve has a discharge chamber and a plurality of suction chambers, the discharge chamber being located in the middle of the one-way valve, and the plurality of suction chambers being evenly distributed circumferentially around the discharge chamber, the total number of suction chambers being equal to the number of drain holes in each ring.

[0019] A water purifier includes the aforementioned diaphragm pump.

[0020] The aforementioned water purifier can increase the opening area of ​​the diaphragm pump's drain hole within a limited space, effectively reducing the generation of eddies and the water pressure, making the water flow from the drain hole smoother, and reducing the noise of water flow inside the diaphragm pump. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a diaphragm pump in one embodiment;

[0022] Figure 2 for Figure 1 The top view of the diaphragm pump shown;

[0023] Figure 3 for Figure 1 The diagram shows a schematic of the valve body in the diaphragm pump.

[0024] Figure 4 for Figure 3 A partial top view of the valve body in one embodiment is shown;

[0025] Figure 5 This is a partial top view of the valve body in another embodiment;

[0026] Figure 6 This is a partial top view of the valve body in another embodiment.

[0027] Figure label:

[0028] 100. Outer shell; 101. Inlet; 102. Outlet; 200. Check valve; 201. Discharge chamber; 202. Suction chamber; 203. Drain hole; 204. First hole section; 204a. First inner edge; 204b. First outer edge; 205. Second hole section; 205a. Second inner edge; 205b. Second outer edge; 206. Inlet hole; 210. Valve body; 211. Mounting hole. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 this application.

[0031] 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 at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "initial," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] Please refer to Figure 1 In one embodiment, the water purifier includes a diaphragm pump.

[0036] Specifically, a water purifier includes a casing and, inside the casing, a water circuit board, a diaphragm pump, and filter cartridges. These components are connected by pipes to form a circulation loop, purifying the water flow. The diaphragm pump primarily provides power for the water flow. For example, the filter cartridge can be a reverse osmosis membrane. Since the reverse osmosis membrane provides resistance to water flow, the diaphragm pump, located upstream of the membrane, provides the power for the water to overcome this resistance and flow efficiently through the membrane.

[0037] During operation, existing diaphragm pumps generate vibrations due to motor operation, and due to unreasonable internal structural design, they are prone to generating friction noise and eddies in the water flow. These factors affect the pump's output flow rate and pressure, resulting in low operating efficiency.

[0038] Based on the above considerations, a diaphragm pump and a water purifier were designed. The drain hole 203 is designed as a first hole section 204 and a second hole section 205 connected together. The first hole section 204 extends along the circumferential direction of the one-way valve 200, which can increase the opening area of ​​the drain hole 203 in a limited space, effectively reduce the generation of eddies and the water pressure, make the water flow line of the drain hole 203 smoother, and reduce the water flow noise in the diaphragm pump.

[0039] Please refer to Figure 1 and Figure 2 In one embodiment, the diaphragm pump includes a housing 100 and a one-way valve 200. The housing 100 has an inlet 101. The one-way valve 200 is located inside the housing 100 and has a discharge chamber 201 and a suction chamber 202. The suction chamber 202 is connected to the inlet 101. The one-way valve 200 is also provided with a drain hole 203 for connecting the discharge chamber 201 and the suction chamber 202.

[0040] Among them, in conjunction with reference Figure 3 and Figure 4 The drain hole 203 includes a first hole section 204 and a second hole section 205. The second hole section 205 is connected to at least one end of the first hole section 204. The first hole section 204 is along the circumferential direction of the one-way valve 200 (i.e., Figure 4 Extending in the X direction (as shown).

[0041] Here, the second hole segment 205 is connected to at least one end of the first hole segment 204, which can be understood as: either end of the first hole segment 204 is provided with the second hole segment 205, or both ends of the first hole segment 204 are provided with the second hole segment 205.

[0042] It should be noted that the discharge chamber 201 and the suction chamber 202 are located on different sides of the one-way valve 200, and the outer casing 100 also includes a water outlet 102 communicating with the discharge chamber 201. When the purifier is in the water purification state, water flows into the inner casing 100 through the water inlet 101 and into the suction chamber 202. After being pressurized in the suction chamber 202, the water flows out through the drain hole 203 to the discharge chamber 201, and finally flows through the discharge chamber 201 to the water outlet 102, thereby realizing the function of pressurizing the water flow.

[0043] In the aforementioned diaphragm pump, the drain hole 203 is designed as a connected first hole section 204 and a second hole section 205. The first hole section 204 extends along the circumferential direction of the one-way valve 200, which can increase the opening area of ​​the drain hole 203 in a limited space, effectively reduce the generation of eddies and the outlet water pressure, make the water flow line of the drain hole 203 smoother, and reduce the water flow noise in the diaphragm pump.

[0044] In this embodiment, reference Figure 1The number of inlet 101 and outlet 102 is one, and the inlet 101 and outlet 102 are arranged opposite to each other. In other embodiments, the number of inlet 101 and outlet 102 may also be at least two, and all inlets 101 and outlets 102 may be located on the same side or different sides of the housing 100.

[0045] In this embodiment, the housing 100 has an opening located at the bottom of the housing 100. A one-way valve 200 is disposed at the opening and is sealed to prevent water from flowing out through the gap between the housing 100 and the one-way valve 200. The one-way valve 200 and the housing 100 can be locked together by plugging, snapping, or bolting.

[0046] Please refer to Figure 4 The opening width of the first hole segment 204 is equal to the opening width of the second hole segment 205.

[0047] Understandably, reference Figure 4 The first orifice 204 includes a first inner edge 204a and a first outer edge 204b, and the opening width of the first orifice 204 is the distance between the first inner edge 204a and the first outer edge 204b. The second orifice 205 includes a second inner edge 205a and a second outer edge 205b, and the opening width of the second orifice 205 is the distance between the second inner edge 205a and the second outer edge 205b. With this configuration, the opening width of the first orifice 204 is equal to the opening width of the second orifice 205, which makes the water flow line of the drain hole 203 smoother and more stable, reduces the generation of eddies, and helps improve the water flow stability of the drain hole 203.

[0048] Specifically, in this embodiment, the opening width of the first hole segment 204 and the opening width of the second hole segment 205 are both 0.3mm to 0.8mm.

[0049] Understandably, if the widths of the first orifice section 204 and the second orifice section 205 are too small, eddies will easily form when water flows through the drain hole 203, increasing frictional noise. Conversely, if the widths of the first orifice section 204 and the second orifice section 205 are too large, the water flow through the drain hole 203 will be too large, affecting the outlet pressure. By limiting the opening widths of the first orifice section 204 and the second orifice section 205, the frictional noise of water flowing through the diaphragm pump is reduced, while simultaneously ensuring the diaphragm pump's outlet flow rate and outlet pressure.

[0050] In other embodiments, the opening width of the first hole segment 204 and the opening width of the second hole segment 205 can also be designed to other numerical ranges as needed.

[0051] Specifically, in this embodiment, please refer to... Figure 4The first hole segment 204 is an arc-shaped hole extending along the circumferential direction of the one-way valve 200, and the second hole segment 205 is a strip-shaped hole extending along a first direction different from the circumferential direction of the one-way valve 200.

[0052] For example, the drain hole 203 includes a first hole section 204 and two second hole sections 205, with the two second hole sections 205 respectively located at both ends of the first hole section 204. The drain hole 203 is a U-shaped hole. This increases the water outlet area of ​​the drain hole 203, which helps to improve the water outlet stability of the drain hole 203.

[0053] Further, please refer to Figure 4 The radius of the first hole section 204 is 1mm to 3mm.

[0054] It is understandable that the radius of the first orifice 204 is the radius corresponding to the first outer edge 204b. If the radius of the first orifice 204 is too small, the water outlet area of ​​the first orifice 204 will be small and the water flow velocity will be high, making it easy for the water to hit the side wall of the outlet chamber and generate noise; if the radius of the first orifice 204 is too large, the water outlet direction of the first orifice 204 will be more dispersed, which will easily cause pressure loss. Through the above settings, by limiting the radius of the first orifice 204, the shape of the drain hole 203 is optimized, reducing the frictional noise of water flowing through the diaphragm pump, while also helping to ensure the water flow rate and water pressure of the diaphragm pump.

[0055] It should be noted that in other embodiments, the first hole segment 204 and the second hole segment 205 may both be strip-shaped holes or both be arc-shaped holes.

[0056] Furthermore, please refer to Figure 4 and Figure 5 The angle between the tangent of the second hole segment 205 and the tangent of the first hole segment 204 is an acute angle or a right angle.

[0057] It is understandable that the angle α between the tangent L2 of the second hole segment 205 and the tangent L1 of the first hole segment 204 is an acute angle or a right angle, which can maximize the opening range of the drain hole 203 within the effective space, thus helping to ensure the water flow and water pressure of the diaphragm pump.

[0058] For example, such as Figure 4 As shown, the angle α between the tangent L2 of the second hole segment 205 and the tangent L1 of the first hole segment 204 is a right angle; Figure 5 As shown, the angle α between the tangent L2 of the second hole segment 205 and the tangent L1 of the first hole segment 204 is an acute angle.

[0059] Please refer to some embodiments of this application. Figure 6 The one-way valve 200 has several drain holes 203, and all drain holes 203 are evenly distributed in a circumferential direction with the center of the one-way valve 200 as the center.

[0060] Here, "one-way" can be understood as water flowing only from the suction chamber 202 to the discharge chamber 201, and not from the discharge chamber 201 to the suction chamber 202, to ensure that the diaphragm pump provides sufficient power for the water flow. Through this arrangement, all drain holes 203 are evenly distributed circumferentially around the center of the one-way valve 200, making the water flow more concentrated and increasing the water outlet area, which is beneficial for the diaphragm pump to achieve its pressurization function.

[0061] In this embodiment, all drain holes 203 are identical in shape and size. For example, please refer to... Figure 6 All drainage holes 203 are U-shaped, and all drainage holes 203 have the same opening area. In other embodiments, the shape and size of all drainage holes 203 may not be exactly the same or may be completely different. For example, all drainage holes 203 may be a combination of U-shaped holes and round holes, that is, some drainage holes 203 are U-shaped holes and other drainage holes 203 are round holes.

[0062] Please refer to Figure 6 The check valve 200 has at least two rings of drain holes 203 along its radial direction, and the spacing between each drain hole 203 in each two adjacent rings is equal in the radial direction of the check valve 200.

[0063] Here, the radial direction of the one-way valve 200 is... Figure 6 The Y direction is shown. Through the above arrangement, the spacing between the drain holes 203 of adjacent rings in the radial direction of the one-way valve 200 is equal, making the water flow from the drain holes 203 to the discharge chamber 201 more stable.

[0064] For example, please refer to Figure 6 The check valve 200 has three rings of drain holes 203 along its radial direction, and each ring has four drain holes 203 evenly distributed circumferentially around the center of the check valve 200. The three rings of drain holes 203 are the first ring, the second ring, and the third ring, respectively. The first ring is the innermost ring, the third ring is the outermost ring, and the second ring is located between the first and third rings. The radial distance between the first and second rings of the check valve 200 is equal to the radial distance between the second and third rings of the check valve 200.

[0065] In this embodiment, the shape and size of all drain holes 203 located in the same circle are exactly the same. For example, please refer to... Figure 6 The four drain holes 203 located in the same circle are all U-shaped holes, and the opening areas of the four drain holes 203 are all equal. In other embodiments, the shapes and sizes of the drain holes 203 located in the same circle may not be exactly the same or may be completely different. For example, please refer to... Figure 6The four drainage holes 203 located in the same circle can be a combination of U-shaped holes and round holes, that is, some drainage holes 203 are U-shaped holes and other drainage holes 203 are round holes.

[0066] Further, please refer to Figure 6 From the center of the one-way valve 200 to the outer edge of the one-way valve 200, the opening area of ​​each drain hole 203 located in different rings gradually increases.

[0067] It should be noted that the gradual increase can be linear or non-linear. With the above settings, the opening area of ​​the drain hole 203 gradually increases from the inside to the outside. Based on increasing the water outlet area of ​​the one-way valve 200, the water flow direction from the drain hole 203 to the discharge chamber 2011 is more stable, reducing the intensity of the eddy current.

[0068] For example, please refer to Figure 6 The check valve 200 has three rings of drain holes 203 along its radial direction, and each ring has four drain holes 203 evenly distributed in a circumferential direction with the center of the check valve 200 as the center. The first ring is the innermost ring, and the third ring is the outermost ring. From the first ring to the third ring, the opening area of ​​the drain holes 203 gradually increases.

[0069] In this embodiment, the opening areas of all drainage holes 203 located in the same circle are equal. For example, please refer to... Figure 5 The four drainage holes 203 located in the same circle have equal opening areas. In other embodiments, the opening areas located in the same circle may not be equal.

[0070] Please refer to Figure 3 The one-way valve has a discharge chamber 201 and several suction chambers 202. The discharge chamber 201 is located in the middle of the one-way valve 200. The several suction chambers 202 are evenly distributed in a ring around the discharge chamber 201. The total number of suction chambers 202 is equal to the number of drain holes 203 in each ring.

[0071] Here, by making the total number of suction chambers 202 equal to the number of drain holes 203 in each ring, water can flow from any suction chamber 202 through a corresponding drain hole 203 to the discharge chamber 201, which better ensures the stability of the water output and enhances the pressurization effect of the diaphragm pump.

[0072] For example, please refer to Figure 3The one-way valve 200 has one discharge chamber 201 and four suction chambers 202, which are evenly distributed circumferentially around the discharge chamber 201. The one-way valve 200 has three rings of drain holes 203, with each ring having four evenly distributed drain holes 203, meaning each suction chamber 202 corresponds to one drain hole 203. When the purifier is in water purification mode, water flows into the housing 100 through the inlet 101 and into the suction chambers 202. After being pressurized in any suction chamber 202, the water flows out through the corresponding drain hole 203 to the discharge chamber 201, and finally flows through the discharge chamber 201 to the outlet 102.

[0073] In this embodiment, all suction chambers 202 are of equal size to ensure the water inflow rate and stability of each suction chamber 202. In other embodiments, the size and shape of all suction chambers 202 may not be exactly the same.

[0074] For details, please refer to Figure 4 The one-way valve 200 includes a valve body 210 and a valve core. The valve body 210 has a mounting hole 211 in the middle for the valve core to pass through. The valve body 210 has a discharge chamber 201 and a suction chamber 202 on different sides.

[0075] It should be noted that the valve core is movably mounted on the valve body 210. By driving the valve core to move, the drain hole 203 can be opened and closed, thereby isolating or connecting the suction chamber 202 and the discharge chamber 201. For example, when the water purifier is not in use, the valve core is in the first position and the drain hole 203 is closed, and the suction chamber 202 and the discharge chamber 201 are not connected. When the water purifier is in the water purification state, the valve core is driven to switch from the first position to the second position, the drain hole 203 is opened, the suction chamber 202 and the discharge chamber 201 are connected, and the water in the suction chamber 202 is pressurized and can flow into the discharge chamber 201 through the drain hole 203.

[0076] In this embodiment, the mounting hole 211 is circular to fit the valve core. In other embodiments, the mounting hole 211 may also be square or other shapes. The shape of the mounting hole 211 is not specifically limited here.

[0077] In this embodiment, the valve body 210 and the valve core are separate structures, and the valve body 210 and the valve core are detachably connected. In other embodiments, the valve body 210 and the valve core can also be an integral structure, which has good integrity and is convenient for quick assembly and disassembly.

[0078] For more specific details, please refer to Figure 3 and Figure 2 The valve body 210 has a drain hole 203 and a water inlet hole 206. The water inlet hole 206 is used to connect the suction chamber 202 and the water inlet 101.

[0079] Here, when the purification component is in the purification state, water flows into the interior of the housing 100 through the inlet 101 and into the suction chamber 202 of the one-way valve 200 through the inlet hole 206. After being pressurized in the suction chamber 202, water flows out through the drain hole 203 to the discharge chamber 201 and then out through the outlet 102 of the housing 100, thereby realizing the function of pressurizing the water flow.

[0080] Please refer to some embodiments of this application. Figure 3 Each suction chamber 202 is provided with a number of water inlets 206, and all water inlets 206 are distributed circumferentially along the suction chamber 202.

[0081] Specifically, the suction chamber 202 is circumferentially arc-shaped. With the above arrangement, all the water inlets 206 are distributed circumferentially along the suction chamber 202, which allows water entering the housing 100 to flow quickly into the suction chamber 202 through the water inlets 206.

[0082] It should be noted that in other embodiments, the plurality of water inlets 206 corresponding to each suction chamber 202 may also be arranged in a rectangular array or other arrangements.

[0083] In this embodiment, all water inlets 206 are circular, and all water inlets 206 have the same diameter. In other embodiments, the diameters of all water inlets 206 may not be completely equal.

[0084] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A diaphragm pump, characterized in that, include: The outer casing (100) has a water inlet (101); A one-way valve (200) is disposed inside the housing (100) and has a discharge chamber (201) and a suction chamber (202). The suction chamber (202) is connected to the water inlet (101). The one-way valve (200) is also provided with a drain hole (203) for connecting the discharge chamber (201) and the suction chamber (202). The drain hole (203) includes a first hole section (204) and a second hole section (205), the second hole section (205) is connected to at least one end of the first hole section (204), and the first hole section (204) extends along the circumferential direction of the one-way valve (200). The first hole segment (204) is an arc-shaped hole extending along the circumferential direction of the one-way valve (200), and the second hole segment (205) is a strip-shaped hole extending along a first direction different from the circumferential direction of the one-way valve (200).

2. The diaphragm pump according to claim 1, characterized in that, The opening width of the first hole segment (204) is equal to the opening width of the second hole segment (205).

3. The diaphragm pump according to claim 2, characterized in that, The opening width of the first hole segment (204) and the opening width of the second hole segment (205) are both 0.3mm to 0.8mm.

4. The diaphragm pump according to claim 1, characterized in that, The radius of the first hole segment (204) is 1mm to 3mm.

5. The diaphragm pump according to claim 1, characterized in that, The angle between the tangent of the second hole segment (205) and the tangent of the first hole segment (204) is an acute angle or a right angle.

6. The diaphragm pump according to claim 1, characterized in that, The one-way valve (200) has a plurality of drain holes (203), all of which are evenly distributed in a circumferential direction with the center of the one-way valve (200) as the center.

7. The diaphragm pump according to claim 6, characterized in that, The check valve (200) has at least two rings of drain holes (203) in the radial direction, and the drain holes (203) in every two adjacent rings are equally spaced in the radial direction of the check valve (200).

8. The diaphragm pump according to claim 7, characterized in that, From the center of the one-way valve (200) to the outer edge of the one-way valve (200), the opening area of ​​each of the drain holes (203) located in different rings gradually increases.

9. The diaphragm pump according to claim 7, characterized in that, The one-way valve (200) has a discharge chamber (201) and a plurality of suction chambers (202). The discharge chamber (201) is located in the middle of the one-way valve (200). The plurality of suction chambers (202) are evenly distributed in a ring around the discharge chamber (201). The total number of suction chambers (202) is equal to the number of drain holes (203) in each ring.

10. A water purifier, characterized in that, Including the diaphragm pump as described in any one of claims 1-9.

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