Diaphragm pump and dishwasher

Abstract

The application discloses a diaphragm pump and a dishwasher with the diaphragm pump, wherein the diaphragm pump comprises a pump cover, a valve seat, a cup seat and a driving assembly; the pump cover is provided with a water outlet and a plurality of water suction ports; the valve seat is installed on the pump cover and forms a water discharge cavity and a plurality of water inlet cavities with the pump cover; the water discharge cavity is communicated with the water outlet; the water inlet cavities are communicated with the water suction ports one by one; the cup seat is provided with a plurality of cup capsules; the water suction cavities are formed between the plurality of cup capsules and the valve seat; and the water suction cavities are communicated with the water inlet cavities one by one; the driving assembly can make the cup capsules elastically deform, so that the volume of the water suction cavities changes to realize water suction or water discharge; the application is provided with a plurality of independent water inlet cavities; the plurality of water inlet cavities are communicated with the plurality of water suction ports and the plurality of water suction cavities one by one to realize independent water suction; when one or more water inlet cavities suck in air, the air cannot enter other water inlet cavities, so that the other water inlet cavities can still work normally.

Description

Technical Field

[0001] This invention relates to the field of pump structure technology, and in particular to a diaphragm pump and a dishwasher. Background Technology

[0002] Diaphragm pumps primarily use mechanical devices to cause the diaphragm inside the pump to reciprocate, creating a continuous vacuum or negative pressure at the inlet and a slight positive pressure at the outlet, thus completing the pumping and draining operations. In existing technologies, diaphragm pumps typically have only one inlet and one outlet, allowing only one inlet and one outlet. When pumping water from multiple sources simultaneously, a multi-port system is usually installed at the inlet to achieve multiple inlets and one outlet. However, when using a multi-port system, once one inlet completes its pumping operation, air may be drawn in, preventing negative pressure from forming at the other inlets and causing the entire diaphragm pump to stop pumping. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a diaphragm pump with multiple water inlets that operate independently of each other. When air is drawn into one or more of the water inlets, the other water inlets can still perform normal water pumping operations.

[0004] The present invention also provides a dishwasher having the above-described diaphragm pump.

[0005] According to a first aspect of the present invention, a diaphragm pump includes: a pump cover, a valve seat, a cup seat, and a drive assembly. The valve seat is mounted on the pump cover, and a drain chamber and a plurality of inlet chambers are formed between the valve seat and the pump cover. The drain chamber is connected to the drain outlet, and the inlet chambers are connected to the pump inlets one-to-one. The cup seat has a plurality of cups, and each cup has a pumping chamber formed between it and the valve seat. The plurality of pumping chambers are connected to the drain chamber through their respective outlet channels, and each pumping chamber is connected to the plurality of inlet chambers through an inlet channel. The inlet channel is provided with an inlet check valve that can be directed toward the pumping chamber, and the outlet channel is provided with an outlet check valve that can be directed toward the drain chamber. The drive assembly is connected to the pump cover, and the drive assembly can cause the cups to undergo elastic deformation to change the volume of the pumping chamber.

[0006] The diaphragm pump according to an embodiment of the present invention has at least the following beneficial effects: the valve seat is mounted on the pump cover, and a drain chamber and a plurality of inlet chambers are formed between the valve seat and the pump cover. During pumping, the drive assembly expands the bladder, allowing water to flow from the suction port into the inlet chamber, then open the inlet check valve and flow into the suction chamber through the inlet channel. At this time, the outlet check valve blocks the outlet channel, preventing water in the drain chamber from flowing back into the suction chamber. During drainage, the drive assembly contracts the bladder to squeeze the water in the suction chamber, causing the water to open the outlet check valve and flow into the drain chamber through the outlet channel, then out through the drain port. At this time, the inlet check valve blocks the inlet channel, preventing water in the suction chamber from flowing into the inlet chamber. In the technical solution of this application, there are multiple water inlet chambers, and each water inlet chamber is connected to a corresponding water outlet. The multiple water inlet chambers are also connected to a corresponding water outlet chamber. The multiple water outlet chambers are connected to the drainage chambers through their respective water outlet channels. Therefore, when air is drawn into one or more water inlet chambers, the air cannot enter other water inlet chambers, thus ensuring that the other water inlet chambers can still work normally.

[0007] According to some embodiments of the present invention, the diaphragm pump further includes a seal disposed between the valve seat and the pump cover, wherein the inner wall of the pump cover is provided with a first isolation portion, the first isolation portion abutting against the seal to separate the plurality of water inlet chambers.

[0008] According to some embodiments of the present invention, the sealing member is provided with a first sealing portion, and the first isolation portion is sleeved on the first sealing portion.

[0009] According to some embodiments of the present invention, the first sealing portion is provided with a first inclined surface, and the first isolation portion is provided with a second inclined surface that matches the first inclined surface, the second inclined surface abutting against the first inclined surface.

[0010] According to some embodiments of the present invention, the seal is provided with a hollowed-out section to avoid the water inlet channel.

[0011] According to some embodiments of the present invention, a cavity is provided between the valve seat and the seal, and the valve seat is provided with a second isolation portion, which abuts against the seal to separate the cavity from the water inlet cavity, thereby making the cavity constitute the drain cavity.

[0012] According to some embodiments of the present invention, the seal further comprises a second sealing portion, one end of the second sealing portion abutting against the second isolation portion, the other end abutting against the pump cover, and the second sealing portion covering the drain outlet.

[0013] According to some embodiments of the present invention, the second isolation part is a circular sleeve, which is open at one end facing the pump cover, and the inner cavity of the circular sleeve constitutes the drainage cavity.

[0014] According to some embodiments of the present invention, the water outlet valve plate is disposed at the end of the water outlet channel, and the water outlet valve plate is located inside the circular sleeve.

[0015] According to some embodiments of the present invention, one end of the plurality of water outlet channels is arranged circumferentially around the water outlet check valve so that the water outlet valve plate can cover the plurality of water outlet channels.

[0016] According to some embodiments of the present invention, the valve seat is provided with a plurality of grooves on the side opposite to the water inlet chamber, and each cup is provided in one of the grooves to form the water pumping chamber, and the plurality of grooves are spaced apart along the circumference of the circular sleeve.

[0017] According to some embodiments of the present invention, the bottom wall of the groove is provided with a notch on the side near the circular sleeve, and the notch communicates with the drainage cavity to form the water outlet channel.

[0018] According to some embodiments of the present invention, the bottom wall of the groove is provided with a plurality of through holes on the side away from the notch, and the plurality of through holes communicate with the water inlet cavity to form the water inlet channel.

[0019] According to some embodiments of the present invention, the inlet check valve is provided with an inlet valve plate, and a plurality of the through holes are arranged circumferentially around the inlet check valve so that the inlet valve plate can cover the plurality of the through holes.

[0020] A dishwasher according to a second aspect of the present invention includes the diaphragm pump described in the first aspect of the present invention.

[0021] The dishwasher according to embodiments of the present invention has at least the following beneficial effects: the diaphragm pump can simultaneously draw water and detergent for the dishwasher's washing operation, and when one type of liquid is exhausted, it does not affect the continued water drawing operation of other inlets. Furthermore, since the dishwasher has the diaphragm pump of the first aspect embodiment, it also possesses at least all the beneficial effects of the diaphragm pump of the first aspect embodiment.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 This is a schematic diagram of the structure of a diaphragm pump according to an embodiment of the present invention;

[0025] Figure 2 This is an exploded view of the structure of a diaphragm pump according to an embodiment of the present invention;

[0026] Figure 3 This is a top view of a diaphragm pump according to an embodiment of the present invention;

[0027] Figure 4 for Figure 3 The cross-sectional view shown at AA;

[0028] Figure 5 This is a partial exploded view of the diaphragm pump according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the internal structure of a diaphragm pump according to an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the internal structure of a diaphragm pump according to another embodiment of the present invention;

[0031] Figure 8 This is a cross-sectional view of a partial structure of a diaphragm pump according to an embodiment of the present invention;

[0032] Figure 9 for Figure 8 The enlarged view at point D is shown;

[0033] Figure 10 This is a front view of a diaphragm pump according to an embodiment of the present invention;

[0034] Figure 11 for Figure 10 The cross-sectional view shown at BB;

[0035] Figure 12 for Figure 11 The diagram shown is a cross-sectional view without an outlet check valve.

[0036] Figure 13 for Figure 10 The cross-sectional view shown at CC;

[0037] Figure 14 for Figure 13 The diagram shown is a cross-sectional view without an inlet check valve.

[0038] Figure 15 This is an exploded view of a portion of the structure of a diaphragm pump according to another embodiment of the present invention;

[0039] Figure 16 This is a cross-sectional view of the drive assembly of a diaphragm pump according to another embodiment of the present invention.

[0040] Figure label:

[0041] Pump cover 100, drain outlet 110, water inlet 120, first isolation section 130, drain pipe 140, water inlet 150;

[0042] Valve seat 200, drain chamber 210, inlet chamber 220, pumping chamber 230, inlet channel 231, outlet channel 232, inlet check valve 240, inlet valve plate 241, outlet check valve 250, outlet valve plate 251, second isolation part 260, sealing groove 261, groove 270, positioning post 280, first mounting hole 290;

[0043] Seal 300, hollow part 310, first sealing part 320, second sealing part 330, protrusion 331;

[0044] Cup holder 400, diaphragm bell cup 410, cup bladder 411, first positioning hole 412, second positioning hole 420, second mounting hole 430;

[0045] Drive assembly 500, motor 510, eccentric wheel 511, oblique hole 5111, mounting base 520, swing frame 530, connecting shaft 540;

[0046] Fastener 600. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0048] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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 limiting this invention.

[0049] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0050] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0051] The diaphragm pump of the first aspect of the present invention, referred to Figure 1 and Figure 2 The diaphragm pump includes a pump cover 100, a valve seat 200, a cup seat 400, and a drive assembly 500. The pump cover 100 is provided with a drain port 110 and multiple suction ports 120. (See also...) Figure 3 and Figure 4 A valve seat 200 is installed on the pump cover 100, and a drain chamber 210 and multiple inlet chambers 220 are formed between the valve seat 200 and the pump cover 100. The number of inlet chambers 220 can be two, three, or four, etc., and the specific number of inlet chambers 220 can be set according to actual needs. The number of water inlets 120 corresponds to the number of inlet chambers 220. Among them, the drain chamber 210 is connected to the drain outlet 110, and the multiple inlet chambers 220 are connected to the multiple water inlets 120 in a one-to-one correspondence. The cup holder 400 is provided with multiple cups 411, and the number of cups 411 corresponds to the number of water inlet chambers 220. For example, if there are three water inlet chambers 220, then there are also three cups 411. Each cup 411 and the valve seat 200 form a water suction chamber 230. Each water suction chamber 230 is provided with a water inlet channel 231 and a water outlet channel 232. The multiple water suction chambers 230 are connected to the drain chamber 210 through their respective water outlet channels 232, and the multiple water suction chambers 230 are connected to the multiple water inlet chambers 220 one by one through their respective water inlet channels 231. The drive assembly 500 is connected to the pump cover 100 and can cause the cup 411 to undergo elastic deformation, thereby changing the volume of the pumping chamber 230 to achieve the function of pumping or draining water. That is, when the cup 411 expands, it creates a negative pressure at the pumping port 120 to pump water; when the cup 411 contracts, it creates a positive pressure at the draining port 110 to drain water.

[0052] It should be noted that the water inlet channel 231 is equipped with a one-way valve 240 that can connect to the pumping chamber 230. That is, when pumping water, the water inlet channel 231 is open from the water inlet chamber 220 to the pumping chamber 230, and closed from the pumping chamber 230 to the water inlet chamber 220. The water outlet channel 232 is equipped with a one-way valve 250 that can connect to the drain chamber 210. That is, when draining water, the water outlet channel 232 is closed from the drain chamber 210 to the pumping chamber 230, and open from the pumping chamber 230 to the drain chamber 210.

[0053] When the diaphragm pump in this application is working, the drive assembly 500 first expands the cup 411, thereby creating a negative pressure at the suction port 120. Water flows from the suction port 120 into the inlet chamber 220, then opens the inlet check valve 240 and flows into the suction chamber 230 through the inlet channel 231. At this time, the outlet check valve 250 can block the outlet channel 232, preventing water in the drain chamber 210 from flowing back into the suction chamber 230. When draining, the drive assembly 500 then contracts the cup 411 to squeeze the water in the suction chamber 230, thereby opening the outlet check valve 250 and flowing into the drain chamber 210 through the outlet channel 232, and then flowing out from the drain port 110. At this time, the inlet check valve 240 can block the inlet channel 231, preventing water in the suction chamber 230 from flowing into the inlet chamber 220. In the technical solution of this application, multiple water inlet chambers 220 are provided, and each water inlet chamber 220 is connected to a corresponding water outlet 120. Furthermore, each water inlet chamber 220 is connected to a corresponding water outlet 230. Each water outlet 230 is connected to a drain chamber 210 through its own outlet channel 232. Therefore, when air is drawn into one or more water inlet chambers 220, the air is sucked into the corresponding water outlet 230, discharged into the drain chamber 210 through the outlet channel 232 of the water outlet 230, and finally discharged from the drain outlet 110. Since each water inlet chamber 220 is isolated from the others, air cannot enter other normally pumping water inlet chambers 220, thus ensuring that other water inlet chambers 220 can form a negative pressure under the action of the cup 411 for normal pumping operation.

[0054] Refer to Figure 1 In some embodiments of the present invention, a drain pipe 140 and multiple suction pipes 150 are connected to the pump cover 100. The drain pipe 140 is connected to the drain outlet 110, and the multiple suction pipes 150 are connected to multiple suction outlets 120 respectively. The ends of the suction pipes 150 and drain pipes 140 away from the pump cover 100 are provided with openings, which are respectively connected to the corresponding suction outlets 120 and drain outlets. The number of suction outlets 120 corresponds to the number of inlet chambers 220. For example, if there are three inlet chambers 220, then there are also three suction outlets 120, and each suction outlet 120 is connected to one inlet chamber 220. The number of suction pipes 150 corresponds to the number of suction outlets 120; that is, if there are three suction outlets 120, then there are also three suction pipes 150, and each suction outlet 120 is connected to a suction pipe 150. By providing a pumping pipe 150 and a drain pipe 140, it is easy to connect the inlet and outlet of the diaphragm pump to other pipes. For example, the pumping pipe 150 is connected to a water source pipe, and the drain pipe 140 is connected to the inlet of other equipment, such as the inlet of a dishwasher according to the second aspect of the present invention, thereby improving the convenience of using the diaphragm pump.

[0055] It should be noted that the suction pipe 150, the drain pipe 140, and the pump cover 100 are integrally formed, thus eliminating the need for separate installation steps for the drain pipe 140, suction pipe 150, and pump cover 100, thereby simplifying the installation process of the diaphragm pump. It should also be noted that the drain pipe 140 and suction pipe 150 can be straight or curved, depending on the actual situation, and no specific limitation is made here.

[0056] Reference Figure 2 In some embodiments of the present invention, the diaphragm pump further includes a seal 300. The seal 300 is disposed between the valve seat 200 and the pump cover 100. The seal 300 can seal the inlet chamber 220 and the outlet chamber 210, preventing leakage from either the inlet chamber 220 or the outlet chamber 210, and can also cooperate with the pump cover 100 to separate multiple inlet chambers 220. Referring again... Figure 5 and Figure 6 The inner wall of the pump cover 100 is provided with a first isolation part 130, which can abut against the end face of the seal 300, thereby separating multiple water inlet chambers 220.

[0057] In some embodiments of the present invention, the sealing member 300 is provided with a hollowed-out portion 310 to avoid the water inlet channel 231, so that the water inlet channel 231 can communicate with the water inlet chamber 220. The valve seat 200 is provided with a protrusion, one end of the water inlet channel 231 is located on the protrusion, and the protrusion can pass through the hollowed-out portion 310. The inner diameter of the hollowed-out portion 310 matches the diameter of the protrusion, thereby limiting the valve seat 200 and improving the stability of the valve seat 200. It should be noted that the shape of the protrusion can also be elliptical, square, or other shapes, and the hollowed-out portion 310 matches the shape of the protrusion.

[0058] In some embodiments of the present invention, the sealing member 300 is provided with a first sealing portion 320 that matches the first isolation portion 130. The first isolation portion 130 is sleeved on the first sealing portion 320, and the end of the first isolation portion 130 along the central axis of the pump cover 100 abuts against the end face of the sealing member 300, thereby separating multiple water inlet chambers 220. It should be noted that the sealing member 300 is installed on the pump cover 100 by an interference fit, thereby improving the sealing performance between the multiple water inlet chambers 220. When air is drawn into one or more water inlet chambers 220, air will not enter the other water inlet chambers 230, and they can still maintain a negative pressure state, thereby performing water pumping.

[0059] Refer to Figure 8 and Figure 9In some embodiments of the present invention, the first sealing portion 320 has a first inclined surface on the side facing the first isolation portion 130, and the first isolation portion 130 has a second inclined surface on the side facing the first inclined surface. When the first isolation portion 130 is fitted onto the first sealing portion 320, the second inclined surface and the first inclined surface are in contact. By providing the first inclined surface, the contact area between the first sealing portion 320 and the first isolation portion 130 can be increased, thereby improving the sealing performance. At the same time, the thickness of the bottom end of the first sealing portion 320 can also be increased, thereby making the sealing member 300 more robust and stable as a whole.

[0060] It should be noted that the first isolation part 130 can be configured as an isolation rib protruding from the inner wall of the pump cover 100 toward the seal 300. The isolation rib protrudes toward the seal 300, thereby abutting against the seal 300 and separating multiple water inlet chambers 220. It should also be noted that the number of isolation ribs corresponds to the number of water inlet chambers 220. For example, if there are three water inlet chambers 220, then there are also three isolation ribs, thus separating the three water inlet chambers 220. The isolation ribs can be integrally formed with the pump cover 100 to simplify the installation process of the diaphragm pump. Alternatively, they can be fixedly connected using screws or bolts, depending on the specific circumstances, and no specific limitation is made here.

[0061] In some embodiments of the present invention, a cavity is provided between the valve seat 200 and the seal 300, which communicates with the inlet chamber 220. The valve seat 200 is provided with a second isolation portion 260, the top end of which abuts against the seal 300, thereby separating the cavity from the inlet chamber 220, thus forming a drain chamber 210. It should be noted that the drain chamber 210 is located at the center of the valve seat 200, and multiple inlet chambers 220 are distributed around the drain chamber 210 at intervals, making the structure of the diaphragm pump more compact and reasonable.

[0062] Refer to Figure 8 and Figure 9 In some embodiments of the present invention, the sealing member 300 is provided with a second sealing portion 330, one end of which abuts against the pump cover 100 and the other end of which abuts against the top of the second isolation portion 260. The second sealing portion 330 covers the drain outlet, thereby separating the water inlet chamber 220 and the drain chamber 210. It should be noted that the second sealing portion 330 is provided with a through hole, through which the drain chamber 210 communicates with the drain outlet 110.

[0063] It should also be noted that the second sealing part 330 has a protrusion 331 at one end facing the second isolation part 260, and the top of the second isolation part 260 has a sealing groove 261 that matches the protrusion 331. The protrusion 331 can be engaged in the sealing groove 261, thereby improving the sealing performance between the drain chamber 210 and the multiple water inlet chambers 220, preventing water leakage between the drain chamber 210 and the multiple water inlet chambers 220. The side of the protrusion 331 facing the sealing groove 261 can be arc-shaped, and the sealing groove 261 can also be correspondingly arc-shaped. Alternatively, the side of the protrusion 331 facing the sealing groove 261 can also be prismatic or pyramidal, and the sealing groove 261 can be shaped to correspond to the protrusion 331, so that the protrusion 331 can be engaged in the sealing groove 261. The protrusion 331 and the sealing groove 261 only need to achieve a sealing effect; the specific shape is not limited here.

[0064] In some embodiments of the present invention, the second isolation portion 260 is a circular sleeve, which is disposed within the perforation of the sealing member 300, with one end of the circular sleeve facing the pump cover 100 open and communicating with the drain port 110. The inner cavity of the circular sleeve forms the drain chamber 210. The sealing groove 261 is disposed at the top end of the annular sleeve, and the top end of the circular sleeve abuts against the second sealing portion 330. The abutting surface between the second sealing portion 330 and the circular sleeve is circular. By making the second isolation portion 260 a circular sleeve, the sealing groove 261 can cooperate with the protrusion 331, which helps to improve the sealing performance between the drain chamber 210 and the multiple water inlet chambers 220. It should be noted that the circular sleeve can be integrally formed with the valve seat 200, or it can be connected to the valve seat 200 by screws or bolts. Of course, the second isolation portion 260 can also be configured in other shapes, such as a square sleeve or an elliptical sleeve, and the abutting surface between the second sealing portion 330 and the second isolation portion 260 can also be configured in a corresponding shape.

[0065] Refer to Figures 10 to 12 In some embodiments of the present invention, the water outlet check valve 250 is provided with a water outlet valve plate 251, which covers the end of the water outlet channel 232 and is located inside a circular sleeve. When water flows from the pumping chamber 230 into the draining chamber 210, under the squeezing action of the cup 411, the water can open the water outlet check valve 250, thereby flowing into the draining chamber 210 through the water outlet channel 232 and then being discharged from the drain outlet 110.

[0066] In some embodiments of the present invention, the outlet valve plate 251 can be folded away from the outlet channel 232 to open the outlet channel 232, allowing water in the drain chamber 210 to flow into the drain chamber 210 through the outlet channel 232. It should be noted that the outlet valve plate 251 can be circular, elliptical, square, or other shapes, depending on actual needs, and is not specifically limited here. Alternatively, it can be a spring-loaded one-way valve. During drainage, water pressure pushes the outlet valve plate 251 to move, thereby opening the outlet channel 232, allowing water in the pumping chamber 230 to flow into the drain chamber 210 through the outlet channel 232. During pumping, the spring drives the outlet valve plate 251 to press against the opening of the outlet channel 232, thereby closing the outlet channel 232, preventing water in the drain chamber 210 from flowing back into the pumping chamber 230.

[0067] In some embodiments of the present invention, multiple pumping chambers 230 are provided, each pumping chamber 230 having a water outlet channel 232, and each pumping chamber 230 communicating with a draining chamber 210 through its respective water outlet channel 232. One end of the water outlet channel 232 is located on the bottom wall of the draining chamber 210, and the multiple water outlet channels 232 are spaced apart around the circumference of the water outlet check valve 250, that is, the water outlet check valve 250 is located at the center of the draining chamber 210, and the multiple water outlet channels 232 are spaced apart around the central axis of the draining chamber 210. This allows multiple water outlet channels 232 to share a single water outlet check valve 250, and the periphery of the water outlet valve plate 251 of the water outlet check valve 250 can cover the multiple water outlet channels 232. It should be noted that the multiple water outlet channels 232 can be evenly spaced around the circumference of the water outlet check valve 250 so that the water outlet valve plate 251 can stably cover each water outlet channel 232.

[0068] When the diaphragm pump drains water, each pumping chamber 230 drains water into the draining chamber 210 through its respective outlet channel 232. Under the action of the cup 411, the water in the outlet channel 232 can squeeze open the outlet valve plate 251 covering the end of the outlet channel 232. Conversely, the water in the corresponding outlet channel 232 can only cause the outlet valve plate 251 covering the part of the outlet channel 232 to fold over, thus opening the corresponding outlet channel 232. By setting a single outlet check valve 250, multiple outlet channels 232 can be opened or closed simultaneously, thereby reducing the number of installation parts in the diaphragm pump, simplifying the installation steps, and saving space inside the draining chamber 210, making the internal space of the diaphragm pump more compact. Alternatively, each outlet channel 232 can be equipped with a corresponding outlet check valve 250, with each outlet check valve 250 controlling the opening or closing of its respective outlet channel 232. Specific settings can be determined according to actual needs and are not specifically limited here.

[0069] In some embodiments of the present invention, see also Figure 7The valve seat 200 has multiple grooves 270 on the side opposite to the water inlet chamber 220. Each cup 411 is covered by a corresponding groove 270, thus forming a water pumping chamber 230 together with the grooves 270. The grooves 270 are spaced apart around the circumference of the circular sleeve, for example, they can be evenly spaced around the circumference of the circular sleeve. Each groove 270 can communicate with the water inlet chamber 220 through its own water inlet channel 231 and with the drain chamber 210 through its own water outlet channel 232. It should be noted that the position and number of grooves 270 correspond to the position and number of water inlet chambers 220, that is, the position of the grooves 270 corresponds one-to-one with the position of the water inlet chambers 220, and the number of grooves 270 is the same as the number of water inlet chambers 220. For example, if there are three water inlet chambers 220, then there are also three grooves 270, and the number of cups 411 is the same as the number of grooves 270, with multiple cups 411 corresponding to and communicating with the grooves 270 one-to-one. It should be noted that the opening shape of the groove 270 can be circular, elliptical, or square, etc., and can be selected according to the actual situation. No specific limitation is made here.

[0070] Refer to Figure 13 and Figure 14 A notch is provided on the bottom wall of the groove 270 near the circular sleeve, specifically on the side of the bottom wall of the groove 270 closest to the central axis of the valve seat 200. This notch communicates with the drain chamber 210, thus forming the water outlet channel 232. It should be noted that the notch is elliptical in shape, with its longer sides being arc-shaped and its shorter sides being straight. This design allows for a larger water outlet channel 232 to meet the water output requirements of the diaphragm pump. Simultaneously, it allows the outlet valve plate 251 of the outlet check valve 250 to simultaneously cover multiple water outlet channels 232. Of course, the notch can also be rectangular or other irregularly shaped, depending on the specific circumstances, and is not specifically limited here.

[0071] Multiple through holes are provided on the side of the bottom wall of the groove 270 away from the notch. These through holes communicate with the water inlet chamber 220, thus forming the water inlet channel 231. Positioning the through holes away from the notch prevents them from interfering with the water outlet. The pumping chamber 230 communicates with the water inlet chamber 220 through these through holes. The small diameter of the through holes prevents foreign objects from entering the pumping chamber 230. Simultaneously, the multiple through holes meet the pumping capacity requirements of the diaphragm pump. It should be noted that the opening shape of the through holes can be circular, elliptical, or square, depending on the actual needs, and is not specifically limited here.

[0072] In some embodiments of the present invention, the inlet check valve 240 is provided with an inlet valve plate 241, which is located in the groove 270 and is used to cover the inlet channel 231. Multiple through holes forming the inlet channel 231 are spaced apart around the inlet check valve 240. For example, the through holes can be evenly spaced around the inlet check valve 240, so that the inlet valve plate 241 can simultaneously cover multiple through holes. The inlet valve plate 241 can be folded away from the inlet channel 231, thereby opening the inlet channel 231. When the diaphragm pump draws water, the cup 411 expands, creating a negative pressure at the suction port 120, allowing water to flow into the inlet chamber 220 and open the inlet valve plate 241, thereby entering the suction chamber 230. During drainage, the inlet valve plate 241 is blocked by the bottom wall of the groove 270 and cannot be folded, thus preventing the inlet channel 231 from opening. Water cannot flow back to the inlet chamber 220 and can only flow into the drain chamber 210 through the outlet channel 232. In this application's technical solution, multiple through holes can be sealed using a single inlet check valve 240, thereby reducing the number of installation parts for the diaphragm pump and simplifying the installation process.

[0073] It should be noted that the bottom wall of the groove 270 is also provided with a first mounting hole 290, and multiple through holes are evenly spaced around the first mounting hole 290. The first mounting hole 290 is used to install the inlet check valve 240. Of course, the bottom wall of the circular sleeve is also provided with a mounting hole with the same structure as the first mounting hole 290. One end of the inlet channel 231 is evenly spaced around this mounting hole. This mounting hole is used to install the outlet check valve 250.

[0074] It should also be noted that the inlet check valve 240 can also be set as a spring-loaded check valve. When pumping water, the water pressure pushes the inlet valve plate 241 to move, thereby opening the inlet channel 231 so that the water in the inlet chamber 220 flows into the drain chamber 210 through the inlet channel 231. When pumping water, the spring drives the inlet valve plate 241 to press the opening of the inlet channel 231, thereby closing the inlet channel 231 so that the water in the drain chamber 210 cannot flow back into the inlet chamber 220.

[0075] In some embodiments of the present invention, a single inlet chamber 220 and multiple outlet chambers, such as two or three outlet chambers, can be provided to form a diaphragm pump with one inlet and multiple outlets. When configured as a single inlet and multiple outlet pump, the existing multiple inlet chambers 220 can be used as drainage chambers 210, and the existing drainage chambers 210 can be used as inlet chambers 220. That is, this can be achieved by installing the inlet check valve 240 and the outlet check valve 250 in reverse order. Of course, multiple inlet chambers 220 and multiple outlet chambers can also be provided to form a diaphragm pump with multiple inlets and multiple outlets, for example, it can be configured as a three-inlet two-outlet or three-inlet three-outlet pump. When configured as a multiple inlet and multiple outlet pump, the existing drainage chamber 210 can be divided into multiple drainage chambers 210, each drainage chamber 210 being connected to a drain outlet 110.

[0076] Refer to Figure 15 and Figure 16 In some embodiments of the present invention, the cup holder 400 is further provided with a second mounting hole 430 for mounting a diaphragm bell cup 410, the diaphragm bell cup 410 being provided with a plurality of cup sacs 411. The valve seat 200 is further provided with a positioning post 280, the diaphragm bell cup 410 being provided with a first positioning hole 412, and the cup holder 400 being provided with a second positioning hole 420. When installing the diaphragm pump, the positioning post 280 passes through the first positioning hole 412 and the second positioning hole 420 respectively to position the cup holder 400 and the diaphragm bell cup 410, facilitating further fixing and installation operations.

[0077] In some embodiments of the present invention, the drive assembly 500 of the diaphragm pump includes a motor 510 and a swing bracket 530. The motor 510 is mounted on a mounting base 520, and fasteners 600, such as bolts, pass through and lock the pump cover 100, valve seat 200, cup seat 400, and mounting base 520 in sequence to install and lock the diaphragm pump as a whole. The diaphragm cup 410 and the seal 300 are provided with clearance positions at corresponding locations to avoid the fasteners 600, so that the fasteners 600 can pass smoothly through the diaphragm cup 410 and the seal 300.

[0078] The output shaft of the motor 510 is connected to the central hole of the eccentric wheel 511. The eccentric wheel 511 also has an oblique hole 5111. The pendulum frame 530 is connected to the oblique hole 5111 on the eccentric wheel 511 via a connecting shaft 540. The pendulum frame 530 has a connecting part extending away from the central axis, and the lower end of the cup 411 is connected to the connecting part of the pendulum frame 530. The motor 510 drives the eccentric wheel 511 to rotate, causing the eccentric wheel 511 to push the pendulum frame 530 to reciprocate, thereby causing the cup 411 to expand or compress, thus performing water pumping and drainage. It should be noted that the number of connecting parts extending outward from the pendulum frame 530 is the same as the number of cups 411, and the multiple connecting parts are evenly arranged around the central axis of the pendulum frame 530. For example, if there are three cups 411, then there are also three corresponding connecting parts of the pendulum frame 530, and the included angle between the three connecting parts is 120°.

[0079] A dishwasher according to a second aspect of the present invention includes a diaphragm pump as described in the first aspect embodiment. The diaphragm pump's suction pipe 150 is connected to a water source or a liquid such as detergent for drawing these liquids. The diaphragm pump's drain pipe 140 is connected to the dishwasher's water inlet to deliver dishwashing liquid to the dishwasher. The diaphragm pump can simultaneously draw water and detergent from the dishwasher, mix them, and deliver them to the dishwasher's water inlet for washing operations. Furthermore, when one type of liquid is exhausted, it does not affect the continued drawing operation of other suction ports 120. Since the dishwasher has the diaphragm pump of the first aspect embodiment, it also possesses at least all the beneficial effects of the diaphragm pump of the first aspect embodiment.

[0080] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A diaphragm pump characterized in that, The utility model discloses a pump cover is equipped with drain port and a plurality of water suction port, valve seat is installed in the pump cover, and the valve seat forms drain cavity and a plurality of water inlet cavity with the pump cover, and the drain cavity communicates with the drain port, and the water inlet cavity communicates with the water suction port one by one, cup seat is equipped with a plurality of cup capsule, and each cup capsule forms water suction cavity with the valve seat, and a plurality of water suction cavities communicate with the drain cavity through respective water outlet channel, and each water suction cavity communicates with a water inlet cavity through water inlet channel, and the water inlet channel is equipped with water inlet check valve that can be directed to the water suction cavity and is conducted, and the water outlet channel is equipped with water outlet check valve that can be directed to the drain cavity and is conducted, drive assembly is connected to the pump cover, and the drive assembly can make the cup capsule produce elastic deformation to make the volume of water suction cavity change, sealing element is arranged between the valve seat and the pump cover, and the inner wall of the pump cover is equipped with first isolation part, and the first isolation part abuts on the sealing element to separate a plurality of water inlet cavities, and the valve seat has cavity with the sealing element, and the valve seat is equipped with second isolation part, and the second isolation part abuts on the sealing element to separate the cavity and the water inlet cavity, so that the cavity constitutes the drain cavity. The sealing element is provided with a first sealing portion, and the first isolation portion is sleeved on the first sealing portion. The first sealing portion is provided with a first inclined surface, and the first isolation portion is provided with a second inclined surface matched with the first inclined surface, and the second inclined surface abuts on the first inclined surface. The sealing element is provided with a hollow position to avoid the water inlet channel. The sealing element is further provided with a second sealing portion, one end of the second sealing portion abuts on the second isolation portion, the other end abuts on the pump cover, and the second sealing portion covers the drain port. The second isolation portion is a circular sleeve, one end of the circular sleeve facing the pump cover is open, and the inner cavity of the circular sleeve constitutes the drain cavity.

2. The membrane pump of claim 1, wherein, The water outlet check valve is provided with a water outlet valve plate, the water outlet valve plate covers the end of the water outlet channel, and the water outlet valve plate is located in the circular sleeve.

3. The membrane pump of claim 2, wherein, A plurality of water outlet channels are arranged around the circumference of the water outlet check valve to enable the water outlet valve plate to cover a plurality of water outlet channels.

4. The membrane pump of claim 1, wherein, The valve seat is provided with a plurality of grooves on the side away from the water inlet cavities, each cup capsule covers one groove to form the water suction cavity, and a plurality of grooves are arranged around the circumference of the circular sleeve.

5. The membrane pump of claim 1, wherein, The bottom wall of the groove is provided with a notch on the side close to the circular sleeve, the notch communicates with the drain cavity to form the water outlet channel.

6. The membrane pump of claim 1, wherein, The bottom wall of the groove is provided with a plurality of through holes on the side away from the notch, and a plurality of through holes communicate with the water inlet cavities to form the water inlet channel.

7. The membrane pump of claim 6, wherein, The water inlet check valve is provided with a water inlet valve plate, and a plurality of through holes are arranged around the circumference of the water inlet check valve to enable the water inlet valve plate to cover a plurality of through holes.

8. The membrane pump of claim 7, wherein, The utility model discloses a pump cover is equipped with drain port and a plurality of water suction port, valve seat is installed in the pump cover, and the valve seat forms drain cavity and a plurality of water inlet cavity with the pump cover, and the drain cavity communicates with the drain port, and the water inlet cavity communicates with the water suction port one by one, cup seat is equipped with a plurality of cup capsule, and each cup capsule forms water suction cavity with the valve seat, and a plurality of water suction cavities communicate with the drain cavity through respective water outlet channel, and each water suction cavity communicates with a water inlet cavity through water inlet channel, and the water inlet channel is equipped with water inlet check valve that can be directed to the water suction cavity and is conducted, and the water outlet channel is equipped with water outlet check valve that can be directed to the drain cavity and is conducted, drive assembly is connected to the pump cover, and the drive assembly can make the cup capsule produce elastic deformation to make the volume of water suction cavity change, sealing element is arranged between the valve seat and the pump cover, and the inner wall of the pump cover is equipped with first isolation part, and the first isolation part abuts on the sealing element to separate a plurality of water inlet cavities, and the valve seat has cavity with the sealing element, and the valve seat is equipped with second isolation part, and the second isolation part abuts on the sealing element to separate the cavity and the water inlet cavity, so that the cavity constitutes the drain cavity.

9. The membrane pump of claim 6, wherein, The sealing element is provided with a first sealing portion, and the first isolation portion is sleeved on the first sealing portion.

10. The membrane pump of claim 9, wherein, The first sealing portion is provided with a first inclined surface, and the first isolation portion is provided with a second inclined surface matched with the first inclined surface, and the second inclined surface abuts on the first inclined surface.

11. The membrane pump of claim 10, wherein, The sealing element is provided with a hollow position to avoid the water inlet channel.

12. The membrane pump of claim 11, wherein, The sealing element is further provided with a second sealing portion, one end of the second sealing portion abuts on the second isolation portion, the other end abuts on the pump cover, and the second sealing portion covers the drain port.

13. A dishwasher, characterized in that The second isolation portion is a circular sleeve, one end of the circular sleeve facing the pump cover is open, and the inner cavity of the circular sleeve constitutes the drain cavity. The water outlet check valve is provided with a water outlet valve plate, the water outlet valve plate covers the end of the water outlet channel, and the water outlet valve plate is located in the circular sleeve. A plurality of water outlet channels are arranged around the circumference of the water outlet check valve to enable the water outlet valve plate to cover a plurality of water outlet channels. The valve seat is provided with a plurality of grooves on the side away from the water inlet cavities, each cup capsule covers one groove to form the water suction cavity, and a plurality of grooves are arranged around the circumference of the circular sleeve. The bottom wall of the groove is provided with a notch on the side close to the circular sleeve, the notch communicates with the drain cavity to form the water outlet channel. The bottom wall of the groove is provided with a plurality of through holes on the side away from the notch, and a plurality of through holes communicate with the water inlet cavities to form the water inlet channel. The water inlet check valve is provided with a water inlet valve plate, and a plurality of through holes are arranged around the circumference of the water inlet check valve to enable the water inlet valve plate to cover a plurality of through holes. The utility model discloses a pump cover is equipped with drain port and a plurality of water suction port, valve seat is installed in the pump cover, and the valve seat forms drain cavity and a plurality of water inlet cavity with the pump cover, and the drain cavity communicates with the drain port, and the water inlet cavity communicates with the water suction port one by one, cup seat is equipped with a plurality of cup capsule, and each cup capsule forms water suction cavity with the valve seat, and a plurality of water suction cavities communicate with the drain cavity through respective water outlet channel, and each water suction cavity communicates with a water inlet cavity through water inlet channel, and the water inlet channel is equipped with water inlet check valve that can be directed to the water suction cavity and is conducted, and the water outlet channel is equipped with water outlet check valve that can be directed to the drain cavity and is conducted, drive assembly is connected to the pump cover, and the drive assembly can make the cup capsule produce elastic deformation to make the volume of water suction cavity change, sealing element is arranged between the valve seat and the pump cover, and the inner wall of the pump cover is equipped with first isolation part, and the first isolation part abuts on the sealing element to separate a plurality of water inlet cavities, and the valve seat has cavity with the sealing element, and the valve seat is equipped with second isolation part, and the second isolation part abuts on the sealing element to separate the cavity and the water inlet cavity, so that the cavity constitutes the drain cavity. The sealing element is provided with a first sealing portion, and the first isolation portion is sleeved on the first sealing portion. The first sealing portion is provided with a first inclined surface, and the first isolation portion is provided with a second inclined surface matched with the first inclined surface, and the second inclined surface abuts on the first inclined surface. The sealing element is provided with a hollow position to avoid the water inlet channel. The sealing element is further provided with a second sealing portion, one end of the second sealing portion abuts on the second isolation portion, the other end abuts on the pump cover, and the second sealing portion covers the drain port. The second isolation portion is a circular sleeve, one end of the circular sleeve facing the pump cover is open, and the inner cavity of the circular sleeve constitutes the drain cavity. The water outlet check valve is provided with a water outlet valve plate, the water outlet valve plate covers the end of the water outlet channel, and the water outlet valve plate is located in the circular sleeve. A plurality of water outlet channels are arranged around the circumference of the water outlet check valve to enable the water outlet valve plate to cover a plurality of water outlet channels. The valve seat is provided with a plurality of grooves on the side away from the water inlet cavities, each cup capsule covers one groove to form the water suction cavity, and a

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