A diaphragm pump

Abstract

The application discloses a diaphragm pump, which comprises a pump shell body internally provided with a containing cavity, an electromagnet assembly, an intermediate shell body, a diaphragm, an isolation shell body internally provided with an isolation cavity and a switch valve structure, the electromagnet assembly comprises an electromagnet fixedly arranged in the containing cavity and an oscillating rod, the intermediate shell body is provided with an independent suction cavity, a transfer cavity and a discharge cavity, the suction cavity is provided with a first suction passage communicated with the containing cavity and a second suction passage communicated with the transfer cavity, the discharge cavity is provided with a first discharge passage and a second discharge passage, the first discharge passage is communicated with the transfer cavity, the diaphragm is sealingly arranged in a communicating port of the side wall of the transfer cavity, the diaphragm is connected with the oscillating rod, the switch valve structure is arranged in the intermediate shell body, the isolation cavity is internally provided with an air inlet passage and an air outlet passage, the air inlet passage is communicated with the containing cavity, and the air outlet passage is communicated with the second discharge passage. Through the above structure, the noise generated during the operation of the diaphragm pump can be weakened, and the diaphragm pump can operate more quietly.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic diaphragm pumps, and particularly to a diaphragm pump. Background Technology

[0002] With the development of society, more and more people like to keep fish at home. In order to ensure that the fish in the aquarium have enough oxygen, people often use diaphragm pumps to aerate the water in the aquarium.

[0003] Existing diaphragm pumps generally employ the following structure: a pump housing with an internal receiving cavity; an electromagnet assembly and an intermediate housing within the receiving cavity; the electromagnet assembly including an electromagnet and a vibrating rod; the electromagnet being fixedly installed inside the receiving cavity; and the vibrating rod being movably positioned in the middle of the electromagnet. When AC power is applied to the electromagnet, it drives the vibrating rod to move back and forth. The intermediate housing is fixedly located inside the receiving cavity and situated on one side of the vibrating rod's end. The intermediate housing contains independent suction, transfer, and discharge chambers. The suction chamber has a first suction channel communicating with the receiving cavity and a second suction channel communicating with the transfer chamber. The discharge chamber... There are a first discharge channel and a second discharge channel. The first discharge channel is connected to the transfer chamber. The side wall of the transfer chamber has a connecting port. A diaphragm is sealed at the connecting port and connected to the oscillating rod. The intermediate shell is equipped with a switching valve structure, which includes a first check valve diaphragm and a second check valve diaphragm. The first check valve diaphragm is located inside the transfer chamber at a position corresponding to the second suction channel. The second check valve diaphragm is located inside the discharge chamber at a position corresponding to the first discharge channel. The side wall of the pump shell is also equipped with an independent air inlet channel and an air outlet channel. The air inlet channel is connected to the receiving cavity, and the air outlet channel is connected to the second discharge channel of the discharge chamber.

[0004] External air can flow into the receiving cavity through the air intake channel, and the air in the receiving cavity can flow into the suction cavity through the first suction channel. When the electromagnet is energized and drives the oscillating rod to move the diaphragm to draw in air, the second check valve diaphragm closes the first discharge channel, and the air inside the suction cavity passes through the second suction channel and flows into the transfer cavity. When the electromagnet is energized and drives the oscillating rod to move the diaphragm to discharge air, the first check valve diaphragm closes the second suction channel, and the air inside the transfer cavity passes through the first discharge channel and flows into the discharge cavity. The air inside the discharge cavity can then flow to the exhaust channel through the second discharge channel. Finally, the air is delivered to the target component through the exhaust channel.

[0005] By adopting the above structure, although the diaphragm pump can drive the oscillating rod with an electromagnet to continuously reciprocate the diaphragm relative to the intermediate shell, allowing the diaphragm to repeatedly draw air from the intake chamber into the transfer chamber and squeeze it out to the discharge chamber, thus enabling the diaphragm pump to continuously supply air, during the continuous reciprocating movement of the diaphragm relative to the intermediate shell for intake and exhaust, the first check valve diaphragm and the second check valve diaphragm open or close the second intake channel or the first discharge channel in a corresponding manner. During this process, the first check valve diaphragm will continuously and rapidly beat the inner wall of the transfer chamber, and the second check valve diaphragm will continuously and rapidly beat the inner wall of the discharge chamber, thus generating a popping noise. Therefore, the diaphragm pump will produce a certain amount of noise when it is powered on and supplying air, especially at night when it is quiet. The noise generated when the diaphragm pump is powered on and supplying air is particularly loud, which seriously affects people's normal use of the diaphragm pump. Summary of the Invention

[0006] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a diaphragm pump that can effectively reduce the noise generated by the diaphragm pump when it is powered on and supplied with gas.

[0007] According to an embodiment of the present invention, a diaphragm pump includes a pump housing, an electromagnet assembly, an intermediate housing, a diaphragm, an isolation housing, and a switching valve structure. The pump housing has an internal receiving cavity. The electromagnet assembly includes an electromagnet and an oscillating rod. The electromagnet is fixedly disposed inside the receiving cavity, and the oscillating rod is movably disposed in the middle of the electromagnet. When the electromagnet is energized, it can drive the oscillating rod to move back and forth. The intermediate housing is fixedly disposed inside the receiving cavity and located on one side of the end of the oscillating rod. The intermediate housing has independent suction chamber, transfer chamber, and discharge chamber. The suction chamber has a first suction channel communicating with the receiving cavity and a second suction channel communicating with the transfer chamber. The discharge chamber has a first discharge channel and a second discharge channel. The first discharge channel communicates with the transfer chamber. The side wall of the transfer chamber has a connecting opening. A membrane seal is installed at the communication port, and the diaphragm is connected to the oscillating rod; the isolation housing seal is attached to the outer wall of the pump housing, and the isolation housing has an isolation cavity inside, with independent air inlet and outlet channels inside the isolation cavity. One end of the air inlet channel is connected to the receiving cavity, and the other end of the air inlet channel extends to the outside of the isolation housing. One end of the air outlet channel is connected to the second discharge channel, and the other end of the air outlet channel extends to the outside of the isolation housing; the switching valve structure is disposed in the intermediate housing; when the electromagnet assembly drives the diaphragm to move and draw in air, the switching valve structure opens the second intake channel and closes the first discharge channel; when the electromagnet assembly drives the diaphragm to move and discharge air, the switching valve structure closes the second intake channel and opens the first discharge channel.

[0008] A diaphragm pump according to an embodiment of the present invention has at least the following beneficial effects:

[0009] An embodiment of the present invention provides a diaphragm pump by sealing an isolation shell outside the pump housing, and setting the air inlet and outlet channels in the isolation cavity of the isolation shell. This extends the air inlet and outlet channels of the diaphragm pump. Therefore, when the diaphragm pump is powered on and supplies air, the noise generated inside the pump housing needs to travel along the extended air inlet and outlet channels to reach the external environment. The noise is greatly reduced, making the diaphragm pump of this embodiment quieter during operation. Thus, it can well meet the user's need for quieter operation of the diaphragm pump.

[0010] In some embodiments of the present invention, the transfer chamber is disposed at one end of the intermediate housing near the oscillating rod, and the suction chamber and the discharge chamber are disposed side by side at one end of the intermediate housing away from the oscillating rod.

[0011] In some embodiments of the present invention, the isolation housing is disposed at the bottom of the pump housing, and the lower part of the intermediate housing is provided with an air outlet connector. The air outlet connector passes through the bottom wall of the pump housing and extends into the isolation cavity. The air outlet channel is provided with an air outlet connection seat that is sealed to the air outlet connector. The second discharge channel passes through the air outlet connector in a downward direction. When the air outlet connector is sealed to the air outlet connection seat, the second discharge channel is sealed to communicate with the air outlet channel.

[0012] In some embodiments of the present invention, there are two intermediate housings, which are arranged one-to-one on one side of the two ends of the oscillating rod. The diaphragms of the two intermediate housings are connected one-to-one to the two ends of the oscillating rod. The two air outlet connectors pass through the bottom wall of the pump housing and extend into the isolation cavity. The air outlet channel is provided with two air outlet connecting seats, which are sealed to the two air outlet connectors one-to-one.

[0013] In some embodiments of the present invention, an air outlet transfer connector is provided on the bottom surface of the pump housing at a position corresponding to the two air outlet plugs. The two air outlet plugs are sealed and inserted into the air outlet transfer connector in a one-to-one correspondence. The two air outlet transfer connectors extend into the isolation cavity and are sealed and connected to the two air outlet connecting seats in a one-to-one correspondence.

[0014] In some embodiments of the present invention, a transfer air inlet connector communicating with the interior of the receiving cavity is provided at the middle position of the bottom surface of the pump housing, and an air inlet connecting seat is provided in the air inlet channel, and the air inlet connecting seat is sealed to the transfer air inlet connector.

[0015] In some embodiments of the present invention, both of the air outlet connectors are provided with an air outlet buffer chamber, and the side wall of the air outlet connector is provided with an air outlet notch connecting the air outlet buffer chamber and the air outlet channel. The air inlet connector is provided with an air inlet buffer chamber, and the side wall of the air inlet connector is provided with an air inlet notch connecting the air inlet buffer chamber and the air inlet channel. When the air outlet transfer connector is inserted into the air outlet connector, the second discharge channel is connected to the air outlet buffer chamber, and the air outlet buffer chamber is connected to the second discharge channel and the air outlet channel. When the transfer air inlet connector is inserted into the air inlet connector, the air inlet buffer chamber is connected to the air inlet channel and the transfer air inlet connector.

[0016] In some embodiments of the present invention, the outer side wall of the isolation housing is provided with an air inlet connector and an air outlet connector. The air inlet connector is connected to the air inlet channel, and the air outlet connector is connected to the air outlet channel. The air inlet notch is opened on the side of the air inlet connector facing the air inlet connector, and the air outlet notch is opened on the side of the air outlet connector away from the air outlet connector.

[0017] In some embodiments of the present invention, the air inlet connector and the air outlet connector are both located on the same side of the isolation housing.

[0018] In some embodiments of the present invention, the transfer chamber is disposed at one end of the intermediate housing near the oscillating rod, and the suction chamber and the discharge chamber are disposed side by side at one end of the intermediate housing away from the oscillating rod;

[0019] The switching valve structure includes a first seal, a second seal, a driving rod, a first driven rod, and a second driven rod. The driving rod is located at the communication port and is fixedly connected to the oscillating rod. The first driven rod is movably disposed outside the intermediate housing on the side near the suction chamber, and the second driven rod is movably disposed outside the intermediate housing on the side near the discharge chamber. Both the first and second driven rods are magnetically connected to the driving rod.

[0020] The first sealing member is movably inserted into the second suction channel along a direction perpendicular to the movement of the oscillating rod. The end of the first sealing member extending to the outside of the intermediate housing is a first abutting end. The first driven rod is provided with a first driving surface group that can abut against the first abutting end. The first driving surface group includes a first front abutting plane, a first abutting inclined surface, and a first rear abutting surface connected in sequence along the front-back direction. A first magnetic driving assembly is provided between the intermediate housing and the first sealing member. The first magnetic driving assembly includes a first magnet and a second magnet that can cooperate to generate magnetic repulsion. The first magnet is located at the end of the first sealing member away from the first driven rod, and the second magnet is located inside the intermediate housing. The first magnetic driving assembly can drive the first sealing member to move outward from the intermediate housing to open the second suction channel and make the first abutting end tightly abut against the first driving surface group.

[0021] The second seal is movably inserted into the first discharge channel along a direction perpendicular to the movement of the oscillating rod. One end of the second seal extending to the outside of the intermediate housing is the second abutment end. The second driven rod is provided with a second driving surface group that can abut against the second abutment end. The second driving surface group includes a second front abutment plane, a second abutment slope, and a second rear abutment surface connected in sequence along the front-back direction. The inclination direction of the second abutment slope is opposite to the inclination direction of the first abutment slope.

[0022] A second magnetic drive assembly is provided between the intermediate housing and the second seal. The second magnetic drive assembly includes a third magnet and a fourth magnet that can cooperate to generate magnetic repulsion. The third magnet is located at the end of the second seal away from the second driven rod, and the fourth magnet is located inside the intermediate housing. The second magnetic drive assembly can drive the second seal to move outward from the intermediate housing to open the first discharge channel and make the second abutment end close to the second drive surface assembly.

[0023] When the oscillating rod drives the active rod, the diaphragm, the first driven rod, and the second driven rod to move horizontally away from the suction chamber, the second abutting end of the second seal moves from the second front abutting plane to the second rear abutting surface. The second rear abutting surface presses the second seal into the middle housing to close the first discharge channel. The first abutting end of the first seal moves from the first front abutting plane to the first rear abutting surface. The first magnetic drive assembly drives the first seal to move out of the middle housing to open the second suction channel. Air inside the suction chamber is drawn into the transfer chamber.

[0024] When the oscillating rod drives the active rod, the diaphragm, the first driven rod, and the second driven rod to move horizontally closer to the suction chamber, the first abutting end of the first seal moves from the first rear abutting surface to the first front abutting plane. The first front abutting plane presses against the first abutting end, causing the first seal to move into the intermediate housing to close the second suction channel. The second abutting end of the second seal moves from the second rear abutting surface to the second front abutting plane. The second magnetic drive assembly drives the second seal to move outward from the intermediate housing to open the first discharge channel, and the air inside the transfer chamber is forced into the discharge chamber.

[0025] 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

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0027] Figure 1 This is a schematic diagram of the external structure of a diaphragm pump according to the first embodiment of the present invention;

[0028] Figure 2 for Figure 1 An exploded view of a partial structure of a diaphragm pump is shown.

[0029] Figure 3 for Figure 1 The diagram shows a partial structural exploded view of a diaphragm pump after the pump housing has been removed.

[0030] Figure 4 for Figure 1 An exploded view of a portion of the intermediate housing of a diaphragm pump is shown.

[0031] Figure 5 for Figure 1 The diagram shows a cross-sectional view of the internal structure of a diaphragm pump.

[0032] Figure 6 for Figure 1 A schematic diagram of a diaphragm pump cross-sectional structure along line AA is shown;

[0033] Figure 7 for Figure 1 A part drawing of the isolation housing of a diaphragm pump is shown;

[0034] Figure 8 for Figure 6 Enlarged view of point B in the middle;

[0035] Figure 9 for Figure 5 Enlarged view of point C in the middle;

[0036] Figure 10 This is a schematic diagram of the structure of a diaphragm pump in the suction state according to the second embodiment of the present invention;

[0037] Figure 11 This is a schematic diagram of the structure of a diaphragm pump in the exhaust state according to the second embodiment of the present invention;

[0038] Figure 12 for Figure 10 Enlarged view of point D in the middle;

[0039] Figure 13 for Figure 11 Enlarged view of point E in the middle;

[0040] Figure 14 This is a schematic diagram of the structure of a diaphragm pump in the suction state according to the third embodiment of the present invention;

[0041] Figure 15 This is a schematic diagram of a diaphragm pump in the exhaust state according to a third embodiment of the present invention. Detailed Implementation

[0042] 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.

[0043] 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.

[0044] In the description of this invention, "several" means one or more, "multiple" 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.

[0045] 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.

[0046] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] Reference Figures 1 to 9According to a first embodiment of the present invention, a diaphragm pump includes a pump housing 100, an electromagnet assembly, an intermediate housing 300, a diaphragm 340, an isolation housing 400, and a switching valve structure. In this embodiment, the pump housing 100 is generally rectangular in shape, and a receiving cavity 110 is provided inside the pump housing 100. The electromagnet assembly includes an electromagnet 200 and an oscillating rod 210. The electromagnet 200 is fixedly disposed inside the receiving cavity 110, and the oscillating rod 210 is movably disposed in the middle of the electromagnet 200. When the electromagnet 200 is energized, it can drive the oscillating rod 210 to move back and forth. Since the magnetic field of the electromagnet 200 changes when the electromagnet 200 is connected to alternating current, and thus the electromagnet 200 can drive the oscillating rod 210 to move back and forth, this is a prior art technique and will not be described in detail here. The intermediate housing 300 is fixedly disposed inside the receiving cavity 110 and located on one side of the end of the vibrating rod 210. The intermediate housing 300 contains three independent chambers: an intake chamber 310, a transfer chamber 320, and an exhaust chamber 330. The intake chamber 310 has a first intake channel 311 communicating with the receiving cavity 110 and a second intake channel 312 communicating with the transfer chamber 320. Specifically, the intake chamber 310 communicates with the receiving cavity 110 through the first intake channel 311 and with the transfer chamber 320 through the second intake channel 312. The exhaust chamber 330 has a first exhaust channel 331 and a second exhaust channel 332. The first exhaust channel 331 communicates with the transfer chamber 320. The transfer chamber 320 has a communication port 321 on its side wall facing the oscillating rod 210. The diaphragm 340 is sealed and installed in the communication port 321 and is connected to the oscillating rod 210.

[0048] The isolation housing 400 is sealed to the outer wall of the pump housing 100. The isolation housing 400 has an isolation cavity 410 inside, which contains an independent air inlet channel 420 and an air outlet channel 430. One end of the air inlet channel 420 is connected to the receiving cavity 110, and the other end extends to the outside of the isolation housing 400. Air from outside the diaphragm pump can flow in through the opening at one end of the air inlet channel 420, then pass through the air inlet channel 420 and flow into the receiving cavity 110. One end of the air outlet channel 430 is connected to the second discharge channel 332, and the other end extends to the outside of the isolation housing 400.

[0049] The switching valve structure is located in the intermediate housing 300. When the electromagnet assembly drives the diaphragm 340 to move and draw in air, the switching valve structure opens the second intake channel 312 and closes the first discharge channel 331. When the electromagnet assembly drives the diaphragm 340 to move and discharge air, the switching valve structure closes the second intake channel 312 and opens the first discharge channel 331.

[0050] The working process of the diaphragm pump in this embodiment is as follows: When the diaphragm pump supplies air, outside air flows into the receiving cavity 110 inside the pump housing 100 through the air inlet channel 420 of the isolation housing 400. The air inside the receiving cavity 110 can then flow into the suction cavity 310 through the first suction channel 311. The electromagnet 200 is connected to AC power, and the electromagnet 200 drives the oscillating rod 210 to move the diaphragm 340 back and forth relative to the intermediate housing 300. When the diaphragm 340 moves out of the transfer cavity 320 and causes the volume inside the transfer cavity 320 to increase, Air inside the suction chamber 310 is drawn into the transfer chamber 320 along the second suction channel 312. When the diaphragm 340 moves into the transfer chamber 320 and the volume inside the transfer chamber 320 decreases, the diaphragm 340 compresses the air inside the transfer chamber 320 and causes the air to flow into the discharge chamber 330 through the first discharge channel 331. Then the air flows from the second discharge channel 332 of the discharge chamber 330 to the air outlet channel 430. Finally, the air is discharged from the other end of the air outlet channel 430. This cycle continues, enabling the diaphragm pump to continuously supply air.

[0051] In this embodiment, the diaphragm pump has an isolation housing 400 sealed to the outside of the pump housing 100, and the air inlet channel 420 and the air outlet channel 430 are disposed in the isolation cavity 410 of the isolation housing 400. This extends the air inlet and outlet channels of the diaphragm pump. Therefore, when the diaphragm pump is powered on and supplies air, the noise generated inside the pump housing 100 needs to travel along the extended air inlet and outlet channels to reach the external environment. During this process, the noise is greatly reduced, making the diaphragm pump of this embodiment quieter when it is working. Therefore, it can well meet the user's demand for quieter operation of the diaphragm pump.

[0052] Reference Figure 4 , Figure 5 , Figure 6 , Figure 8 and Figure 9To simplify the structure of the diaphragm pump in this embodiment, in some embodiments of the present invention, the switching valve structure includes a first check valve diaphragm 350 and a second check valve diaphragm 360. The first check valve diaphragm 350 is disposed inside the transfer chamber 320 at a position corresponding to the second suction channel 312, and the second check valve diaphragm 360 is disposed inside the discharge chamber 330 at a position corresponding to the first discharge channel 331. Specifically, the middle part of the first check valve diaphragm 350 is mounted to the inner wall of the transfer chamber 320 and the second suction channel 312 via a first connecting pin 351. At the position corresponding to the suction channel 312, the first check valve diaphragm 350 can cover and close the second suction channel 312, or the first check valve diaphragm 350 can move away from and open the second suction channel 312. The middle part of the second check valve diaphragm 360 is installed on the inner wall of the discharge chamber 330 at the position corresponding to the first discharge channel 331 via the second connecting pin 361. The second check valve diaphragm 360 can cover and close the first discharge channel 331, or the second check valve diaphragm 360 can move away from and open the first discharge channel 331.

[0053] In this embodiment, both the first check valve diaphragm 350 and the second check valve diaphragm 360 are silicone or rubber diaphragms. When the electromagnet 200 is energized and drives the oscillating rod 210 to move the diaphragm 340 to draw in air, the second check valve diaphragm 360 closes the first discharge channel 331, and the air inside the suction chamber 310 passes through the second suction channel 312 and flows into the transfer chamber 320; when the electromagnet 200 is energized and drives the oscillating rod 210 to move the diaphragm 340 to discharge air, the first check valve diaphragm 350 closes the second suction channel 312, and the air inside the transfer chamber 320 passes through the first discharge channel 331 and flows into the discharge chamber 330.

[0054] Reference Figure 6 and Figure 8 In order to make the structure of the intermediate housing 300 more compact, in some embodiments of the present invention, the transfer cavity 320 is disposed at one end of the intermediate housing 300 near the oscillating rod 210, and the suction cavity 310 and the discharge cavity 330 are disposed side by side at one end of the intermediate housing 300 away from the oscillating rod 210. By adopting the above structure, the layout of the suction cavity 310, the transfer cavity 320 and the discharge cavity 330 is more reasonable and compact, which helps to reduce the size of the intermediate housing 300 and facilitates the production and processing of the intermediate housing 300.

[0055] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 7 and Figure 9To simplify the structure of the diaphragm pump, in some embodiments of the present invention, the isolation housing 400 is disposed at the bottom of the pump housing 100, and the lower part of the intermediate housing 300 is provided with an air outlet connector 370. The air outlet connector 370 passes through the bottom wall of the pump housing 100 and extends into the isolation cavity 410. The air outlet channel 430 is provided with an air outlet connecting seat 431 that is sealed to the air outlet connector 370. The second discharge channel 332 passes through the air outlet connector 370 in a downward direction. When the air outlet connector 370 is sealed to the air outlet connecting seat 431, the second discharge channel 332 is sealed to the air outlet channel 430. By adopting the above structure, the structure of the diaphragm pump of this embodiment can be made more compact, and at the same time, it is convenient to seal the second discharge channel 332 of the discharge cavity 320 to the air outlet channel 430.

[0056] In some embodiments of the present invention, there are two intermediate housings 300, which are arranged one-to-one on one side of the two ends of the oscillating rod 210. The diaphragms 340 of the two intermediate housings 300 are connected one-to-one to the two ends of the oscillating rod 210. Two air outlet connectors 370 pass through the bottom wall of the pump housing 100 and extend into the isolation chamber 410. The air outlet channel 430 is provided with two air outlet connecting seats 431, which are sealed to the two air outlet connectors 370 one-to-one. By adopting the above structure, the two ends of the oscillating rod 210 can correspondingly drive the diaphragms 340 of the two intermediate housings 300 to perform air intake and exhaust, thereby improving the air supply or exhaust volume of the diaphragm pump in this embodiment.

[0057] In some embodiments of the present invention, an air outlet transfer connector 101 is provided at the position corresponding to the two air outlet plugs 370 on the bottom surface of the pump housing 100. The two air outlet plugs 370 are sealed and inserted into the air outlet transfer connector 101 in a one-to-one correspondence. The two air outlet transfer connectors 101 extend into the isolation cavity 410 and are sealed and connected to the two air outlet connecting seats 431 in a one-to-one correspondence.

[0058] By adopting the above structure, the air outlet connector 370 at the lower part of the intermediate housing 300 is inserted into the air outlet transfer connector 101 of the pump housing 100, and then the pump housing 100 and the isolation housing 400 can be assembled together, making the assembly simpler.

[0059] In some embodiments of the present invention, a transfer air inlet connector 102 communicating with the interior of the receiving cavity 110 is provided at the middle position of the bottom surface of the pump housing 100, and an air inlet connecting seat 421 is provided in the air inlet channel 420, the air inlet connecting seat 421 being sealed to the transfer air inlet connector 102. By adopting the above structure, it is convenient for the air inlet channel 420 to communicate with the receiving cavity 110 of the pump housing 100.

[0060] To make the diaphragm pump operate more quietly, in some embodiments of the present invention, each of the two outlet connectors 431 is provided with an outlet buffer chamber 4310. The side wall of the outlet connector 431 has an outlet notch 4311 that connects the outlet buffer chamber 4310 and the outlet channel 430. The inlet connector 421 is provided with an inlet buffer chamber 4210. The side wall of the inlet connector 421 has an inlet notch 4211 that connects the inlet buffer chamber 4210 and the inlet channel 420. When the outlet transfer connector 101 is inserted into the outlet connector 431, the second discharge channel 332 is connected to the outlet buffer chamber 4310, and the outlet buffer chamber 4310 connects the second discharge channel 332 and the outlet channel 430. When the transfer inlet connector 102 is inserted into the inlet connector 421, the inlet buffer chamber 4210 is connected to the inlet channel 420 and the transfer inlet connector 102. By adopting the above structure, the air flows more smoothly inside the air intake channel 420 and the air outlet channel 430, which helps to reduce the noise generated during air flow.

[0061] Furthermore, the outer wall of the isolation housing 400 is provided with an air inlet connector 440 and an air outlet connector 450. The air inlet connector 440 is connected to the air inlet channel 420, and the air outlet connector 450 is connected to the air outlet channel 430. An air inlet notch 4211 is formed on the side of the air inlet connector 421 facing the air inlet connector 440, and an air outlet notch 4311 is formed on the side of the air outlet connector 431 away from the air outlet connector 450. By adopting the above structure, when the noise generated by the diaphragm pump is transmitted to the air outlet buffer chamber 4310 through the second discharge channel 332, the air outlet notch 4311 is facing away from the air outlet connector 450, causing the noise to be transmitted away from the air outlet connector 450. Therefore, it helps to reduce the noise transmitted from the air outlet connector 450, thereby making the diaphragm pump quieter when it is working.

[0062] In some embodiments of the present invention, the air inlet connector 440 and the air outlet connector 450 are both disposed on the same side of the isolation housing 400. This structure facilitates the connection of the air inlet connector 440 and the air outlet connector 450 to external conduits.

[0063] Because a significant slapping sound is generated when the first check valve diaphragm 350 quickly closes the second suction channel 312 and the second check valve diaphragm 360 quickly closes the first discharge channel 331 in the above embodiment, in order to further reduce the noise generated by the diaphragm pump during operation, refer to Figure 10 , Figure 11 , Figure 12 and Figure 13 The diaphragm pump of the second embodiment of the present invention differs from the diaphragm pump of the first embodiment in that the structure of the switching valve is different.

[0064] In this embodiment, the transfer chamber 320 is disposed at one end of the intermediate housing 300 near the oscillating rod 210, and the suction chamber 310 and the discharge chamber 330 are disposed side by side at one end of the intermediate housing 300 away from the oscillating rod 210; the switching valve structure includes a first seal 510, a second seal 520, an active rod 530, a first driven rod 540 and a second driven rod 550.

[0065] The active rod 530 is located at the connecting port 321 and is fixedly connected to the oscillating rod 210. The first driven rod 540 is movably disposed outside the intermediate housing 300 on the side near the suction chamber 310, and the second driven rod 550 is movably disposed outside the intermediate housing 300 on the side near the discharge chamber 330. Both the first driven rod 540 and the second driven rod 550 are magnetically connected to the active rod 530. Specifically, both ends of the active rod 530 are provided with permanent magnets, and the ends of the first driven rod 540 and the second driven rod 550 are provided with permanent magnets that cooperate with the permanent magnets at both ends of the active rod 530 to generate magnetic attraction. Therefore, when the oscillating rod 210 drives the diaphragm 340 to reciprocate, the oscillating rod 210 drives the first driven rod 540 and the second driven rod 550 to follow the diaphragm 340 in reciprocating movement through the active rod 530.

[0066] The first sealing member 510 is movably inserted into the second suction channel 312 along the direction perpendicular to the movement of the oscillating rod 210. The end of the first sealing member 510 extending to the outside of the intermediate housing 300 is the first abutting end 5101. The first driven rod 540 is provided with a first driving surface group that can abut against the first abutting end 5101. The first driving surface group includes a first front abutting plane 541, a first abutting inclined surface 542 and a first rear abutting surface 543 connected in sequence along the front-back direction. A first magnetic driving assembly is provided between the intermediate housing 300 and the first sealing member 510. The first magnetic driving assembly includes a first magnet 511 and a second magnet 512 that can cooperate to generate magnetic repulsion. The first magnet 511 is provided at the end of the first sealing member 510 away from the first driven rod 540, and the second magnet 512 is provided inside the intermediate housing 300. The first magnetic driving assembly can drive the first sealing member 510 to move outward of the intermediate housing 300 to open the second suction channel 312 and make the first abutting end 5101 close to the first driving surface group.

[0067] The second seal 520 is movably inserted into the first discharge channel 331 in a direction perpendicular to the movement of the oscillating rod 210. One end of the second seal 520 extending outside the intermediate housing 300 is the second abutment end 5201. The second driven rod 550 is provided with a second driving surface assembly that can abut against the second abutment end 5201. The second driving surface assembly includes a second front abutment plane 551, a second abutment slope 552, and a second rear abutment surface 553 connected sequentially in the front-rear direction. The inclination direction of the second abutment slope 552 is the same as the inclination direction of the first abutment slope 542. Conversely, a second magnetic drive assembly is provided between the intermediate housing 300 and the second sealing member 520. The second magnetic drive assembly includes a third magnet 521 and a fourth magnet 522 that can cooperate to generate magnetic repulsion. The third magnet 521 is located at the end of the second sealing member 520 away from the second driven rod 550, and the fourth magnet 522 is located inside the intermediate housing 300. The second magnetic drive assembly can drive the second sealing member 520 to move outward from the intermediate housing 300 to open the first discharge channel 331 and make the second abutment end 5201 closely abut against the second drive surface assembly.

[0068] When the oscillating rod 210 drives the active rod 530, diaphragm 340, first driven rod 540 and second driven rod 550 to move horizontally away from the suction chamber 310, the second abutting end 5201 of the second seal 520 moves from the second front abutting plane 551 to the second rear abutting surface 553. The second rear abutting surface 553 presses the second seal 520 into the middle housing 300 to close the first discharge channel 331. The first abutting end 5101 of the first seal 510 moves from the first front abutting plane 541 to the first rear abutting surface 543. The first magnetic drive assembly drives the first seal 510 to move out of the middle housing 300 to open the second suction channel 312. The air inside the suction chamber 310 is sucked into the transfer chamber 320.

[0069] When the oscillating rod 210 drives the active rod 530, diaphragm 340, first driven rod 540 and second driven rod 550 to move horizontally closer to the suction chamber 310, the first abutting end 5101 of the first sealing member 510 moves from the first rear abutting surface 543 to the first front abutting plane 541. The first front abutting plane 541 squeezes the first abutting end 5101 and causes the first sealing member 510 to move into the middle housing 300 to close the second suction channel 312. The second abutting end 5201 of the second sealing member 520 moves from the second rear abutting surface 553 to the second front abutting plane 551. The second magnetic drive assembly drives the second sealing member 520 to move outward from the middle housing 300 to open the first discharge channel 331. The air inside the transfer chamber 320 is squeezed into the discharge chamber 330.

[0070] When the first driving surface group drives the first seal 510 to move into the middle housing 300 and close the second suction channel 312, the first magnet 511 at the end of the first seal 510 and the second magnet 512 inside the middle housing 300 generate magnetic repulsion, which in turn buffers the first seal 510 and prevents the end of the first seal 510 from rapidly hitting the side wall of the second suction channel 312, thereby greatly reducing the noise generated when the first seal 510 closes the second suction channel 312. When the second driving surface group drives the second seal 520 to move into the middle housing 300 and close the first discharge channel 331, the third magnet 521 at the end of the second seal 520 and the fourth magnet 522 inside the middle housing 300 generate magnetic repulsion, which in turn buffers the second seal 520 and prevents the end of the second seal 520 from rapidly hitting the inner wall of the first discharge channel 331, thereby greatly reducing the noise when the second seal 520 closes the first discharge channel 331. By adopting the above structure, the diaphragm pump of this embodiment can operate more quietly when supplying air.

[0071] It should be noted that in the above embodiment, the active rod 530 drives the first driven rod 540 and the second driven rod 550 to move via a permanent magnet. In other embodiments of the present invention, the active rod 530 can also use other structures to drive the first driven rod 540 and the second driven rod 550 to move. Specifically, the active rod 530 is fixedly connected to the oscillation rod 210, and the active rod 530 is located outside the transfer chamber 320. The first driven rod 540 is movably disposed outside the intermediate housing 300 near the suction chamber 310, and the second driven rod 550 is movably disposed outside the intermediate housing 300 near the discharge chamber 330. The first driven rod 540 and the second driven rod 550 are connected to the two ends of the active rod 530 one-to-one by bolts. By adopting the above structure, the active rod 530 can better drive the first driven rod 540 and the second driven rod 550 to move synchronously.

[0072] Reference Figure 14 and Figure 15 The diaphragm pump of the third embodiment of the present invention differs from the diaphragm pump of the second embodiment in that the structure of the switching valve is different.

[0073] In this embodiment, the transfer chamber 320 is disposed at one end of the intermediate housing 300 near the oscillating rod 210. The suction chamber 310 and the discharge chamber 330 are arranged on both sides of the intermediate housing 300 away from the oscillating rod 210, respectively. Specifically, the suction chamber 310 and the discharge chamber 330 are arranged side by side on both sides away from the oscillating rod 210 along the direction perpendicular to the movement of the oscillating rod 210. The second suction channel 312 and the first discharge channel 331 are arranged side by side, and the second suction channel 312 and the first discharge channel 331 are located in the same straight line direction perpendicular to the movement direction of the oscillating rod 210.

[0074] The switching valve structure includes a movable sealing rod 600, a drive main rod 610, a first movable seat 620, and a second movable seat 630. The drive main rod 610 is located at the communication port 321 and is fixedly connected to the oscillating rod 210. The first movable seat 620 is movably disposed on the outside of the intermediate housing 300 near the suction chamber 310, and the second movable seat 630 is movably disposed on the outside of the intermediate housing 300 near the discharge chamber 330. Both the first movable seat 620 and the second movable seat 630 are magnetically connected to the drive main rod 610. Specifically, permanent magnets are provided at both ends of the drive main rod 610, and permanent magnets corresponding to the permanent magnets at both ends of the first movable seat 620 and the second movable seat 630 are provided at their ends to generate magnetic attraction. Therefore, when the oscillating rod 210 drives the diaphragm 340 to reciprocate, the oscillating rod 210 drives the first movable seat 620 and the second movable seat 630 to reciprocate along with the diaphragm 340 through the drive main rod 610.

[0075] The movable sealing rod 600 is movably mounted in the intermediate housing 300 along the direction perpendicular to the movement of the vibrating rod 210, and the two ends of the movable sealing rod 600 abut against the first movable seat 620 and the second movable seat 630 respectively. The movable sealing rod 600 can block the second suction channel 312 and the first discharge channel 331. The movable sealing rod 600 is provided with a first connecting port 601 and a second connecting port 602 at intervals along its length.

[0076] Specifically, the side wall of the intermediate housing 300 is provided with a sliding channel arranged perpendicular to the moving direction of the oscillating rod 210. The sliding channel passes through the intermediate housing 300 and passes through the second suction channel 312 and the first discharge channel 331. The movable sealing rod 600 is movably installed in the sliding channel and can reciprocate along the sliding channel. When the movable sealing rod 600 moves along the sliding channel, the first connecting port 601 can be offset from or coincide with the second suction channel 312, and the second connecting port 602 can coincide with or be offset from the first discharge channel 331.

[0077] The first movable seat 620 is provided with a first guide surface assembly that can abut against one end of the movable sealing rod 600. The first guide surface assembly includes a first front guide plane 621, a first guide slope 622, and a first rear guide surface 623 connected in sequence along the front-rear direction. The second movable seat 630 is provided with a second guide surface assembly that can abut against the other end of the movable sealing rod 600. The second guide surface assembly includes a second front guide plane 631, a second guide slope 632, and a second rear guide surface 633 connected in sequence along the front-rear direction. The inclination direction of the second guide slope 632 is opposite to the inclination direction of the first guide slope 622.

[0078] When the diaphragm pump is powered on, the oscillating rod 210 drives the main drive rod 610, diaphragm 340, first movable seat 620, and second movable seat 630 to move horizontally away from the suction chamber 310. The first guide surface group and the second guide surface group cooperate to drive the movable sealing rod 600 to move in a front-to-back direction, causing the second connecting port 602 to be offset from the first discharge channel 331, and the first connecting port 601 to coincide with the second suction channel 312. The second suction channel 312 is in the open state, and the first discharge channel 331 is in the closed state. Air inside the suction chamber 310 is drawn into the transfer chamber. 320; When the oscillating rod 210 drives the main driving rod 610, diaphragm 340, first moving seat 620 and second moving seat 630 to move horizontally closer to the suction chamber 310, the first guide surface group and the second guide surface group cooperate to drive the moving sealing rod 600 to move from back to front, so that the second connecting port 602 coincides with the first discharge channel 331, the first connecting port 601 and the second suction channel 312 are offset from each other, the second suction channel 312 is in the closed state, the first discharge channel 331 is in the open state, and the air inside the transfer chamber 320 is squeezed into the discharge chamber 330.

[0079] By adopting the above structure, the movable sealing rod 600 can slide along the direction perpendicular to the movement of the oscillating rod 210, thereby switching the opening and closing of the second suction channel 312 or the first discharge channel 331. During this process, the movable sealing rod 600 will not collide with other components, so no knocking sound will be produced, thus making the diaphragm pump of this embodiment less noisy when it is working.

[0080] It should be noted that in the above embodiments, the movable sealing rod 600 drives the first movable seat 620 and the second movable seat 630 to move via a permanent magnet. In other embodiments of the present invention, the movable sealing rod 600 can also use other structures to drive the first movable seat 620 and the second movable seat 630 to move. Specifically, the movable sealing rod 600 is fixedly connected to the oscillating rod 210, and the movable sealing rod 600 is located outside the transfer cavity 320. The first movable seat 620 is movably disposed outside the intermediate housing 300 on the side near the suction cavity 310, and the second movable seat 630 is movably disposed outside the intermediate housing 300 on the side near the discharge cavity 330. The first movable seat 620 and the second movable seat 630 are connected to the two ends of the movable sealing rod 600 one-to-one by bolts. By adopting the above structure, the movable sealing rod 600 can better drive the first movable seat 620 and the second movable seat 630 to move synchronously.

[0081] 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, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A diaphragm pump, characterized in that, include: Pump housing (100), wherein a receiving cavity (110) is provided inside the pump housing (100). An electromagnet assembly, comprising an electromagnet (200) and an oscillating rod (210), wherein the electromagnet (200) is fixedly disposed inside the receiving cavity (110), and the oscillating rod (210) is movably disposed in the middle of the electromagnet (200), wherein the electromagnet (200) can drive the oscillating rod (210) to move back and forth when energized; An intermediate housing (300) is fixedly disposed inside the receiving cavity (110) and located on one side of the end of the oscillating rod (210). The intermediate housing (300) is provided with an independent suction cavity (310), a transfer cavity (320) and a discharge cavity (330). The suction cavity (310) has a first suction channel (311) communicating with the receiving cavity (110) and a second suction channel (312) communicating with the transfer cavity (320). The discharge cavity (330) is provided with a first discharge channel (331) and a second discharge channel (332). The first discharge channel (331) is communicating with the transfer cavity (320). The side wall of the transfer cavity (320) is provided with a connecting port (321). A diaphragm (340) is sealed and installed in the communication port (321), and the diaphragm (340) is connected to the oscillating rod (210); An isolation housing (400) is sealed to the outer wall of the pump housing (100). The isolation housing (400) has an isolation cavity (410) inside. The isolation cavity (410) is provided with an independent air inlet channel (420) and an air outlet channel (430). One end of the air inlet channel (420) is connected to the receiving cavity (110), and the other end of the air inlet channel (420) extends to the outside of the isolation housing (400). One end of the air outlet channel (430) is connected to the second discharge channel (332), and the other end of the air outlet channel (430) extends to the outside of the isolation housing (400). A switching valve structure is disposed in the intermediate housing (300). When the electromagnet assembly drives the diaphragm (340) to move and draw in air, the switching valve structure opens the second intake channel (312) and closes the first discharge channel (331). When the electromagnet assembly drives the diaphragm (340) to move and exhaust, the switching valve structure closes the second intake channel (312) and opens the first exhaust channel (331).

2. A diaphragm pump according to claim 1, characterized in that, The transfer chamber (320) is located at one end of the intermediate housing (300) near the oscillating rod (210), and the suction chamber (310) and the discharge chamber (330) are arranged side by side at one end of the intermediate housing (300) away from the oscillating rod (210).

3. A diaphragm pump according to claim 1, characterized in that, The isolation housing (400) is located at the bottom of the pump housing (100). The lower part of the intermediate housing (300) is provided with an air outlet connector (370). The air outlet connector (370) passes through the bottom wall of the pump housing (100) and extends into the isolation cavity (410). The air outlet channel (430) is provided with an air outlet connection seat (431) that is sealed to the air outlet connector (370). The second discharge channel (332) passes through the air outlet connector (370) in a downward direction. When the vent plug (370) is sealed to the vent connector (431), the second discharge channel (332) is sealed to the vent channel (430).

4. A diaphragm pump according to claim 3, characterized in that, There are two intermediate housings (300), which are arranged one-to-one on one side of both ends of the oscillating rod (210). The diaphragms (340) of the two intermediate housings (300) are connected one-to-one to both ends of the oscillating rod (210). The two air outlet connectors (370) pass through the bottom wall of the pump housing (100) and extend into the isolation chamber (410). The air outlet channel (430) is provided with two air outlet connecting seats (431), and the two air outlet connecting seats (431) are sealed and connected to the two air outlet connectors (370) in a one-to-one correspondence.

5. A diaphragm pump according to claim 4, characterized in that, The bottom surface of the pump housing (100) is provided with an air outlet adapter (101) at the position corresponding to the two air outlet plugs (370). The two air outlet plugs (370) are sealed and inserted into the air outlet adapter (101) one by one. The two air outlet adapters (101) extend into the isolation chamber (410) and are sealed and connected to the two air outlet connecting seats (431) one by one.

6. A diaphragm pump according to claim 5, characterized in that, The bottom surface of the pump housing (100) is provided with a transfer air inlet connector (102) that communicates with the interior of the receiving cavity (110). The air inlet channel (420) is provided with an air inlet connector (421), and the air inlet connector (421) is sealed to the transfer air inlet connector (102).

7. A diaphragm pump according to claim 6, characterized in that, Both of the air outlet connectors (431) are provided with an air outlet buffer chamber (4310) inside. The side wall of the air outlet connector (431) is provided with an air outlet notch (4311) that connects the air outlet buffer chamber (4310) and the air outlet channel (430). The air intake connector (421) is provided with an air intake buffer chamber (4210) inside, and the side wall of the air intake connector (421) is provided with an air intake notch (4211) that connects the air intake buffer chamber (4210) and the air intake channel (420). When the air outlet adapter (101) is inserted into the air outlet connector (431), the second discharge channel (332) is connected to the air outlet buffer chamber (4310), and the air outlet buffer chamber (4310) connects the second discharge channel (332) and the air outlet channel (430). When the transfer air intake connector (102) is inserted into the air intake connector (421), the air intake buffer chamber (4210) is connected to the air intake channel (420) and the transfer air intake connector (102).

8. A diaphragm pump according to claim 7, characterized in that, The outer wall of the isolation housing (400) is provided with an air inlet connector (440) and an air outlet connector (450). The air inlet connector (440) is connected to the air inlet channel (420), and the air outlet connector (450) is connected to the air outlet channel (430). The air intake notch (4211) is located on the side of the air intake connector (421) facing the air intake connector (440), and the air outlet notch (4311) is located on the side of the air outlet connector (431) away from the air outlet connector (450).

9. A diaphragm pump according to claim 8, characterized in that, The air inlet connector (440) and the air outlet connector (450) are both located on the same side of the isolation housing (400).

10. A diaphragm pump according to claim 1, characterized in that, The transfer chamber (320) is located at one end of the intermediate housing (300) near the oscillating rod (210), and the suction chamber (310) and the discharge chamber (330) are arranged side by side at one end of the intermediate housing (300) away from the oscillating rod (210). The switching valve structure includes a first seal (510), a second seal (520), a driving rod (530), a first driven rod (540), and a second driven rod (550). The active rod (530) is located at the communication port (321). The active rod (530) is fixedly connected to the oscillating rod (210). The first driven rod (540) is movably disposed outside the intermediate housing (300) on the side near the suction chamber (310). The second driven rod (550) is movably disposed outside the intermediate housing (300) on the side near the discharge chamber (330). Both the first driven rod (540) and the second driven rod (550) are magnetically connected to the active rod (530). The first seal (510) is movably mounted in the second suction channel (312) in a direction perpendicular to the movement of the oscillating rod (210). One end of the first seal (510) extending to the outside of the intermediate housing (300) is a first abutment end (5101). The first driven rod (540) is provided with a first driving surface assembly that can abut against the first abutment end (5101). The first driving surface assembly includes a first front abutment plane (541), a first abutment slope (542), and a first rear abutment surface (543) connected sequentially in the front-rear direction. The intermediate housing (300) and the first seal (510) are connected in a direction perpendicular to the movement of the oscillating rod (210). A first magnetic drive assembly is provided between 10), the first magnetic drive assembly includes a first magnet (511) and a second magnet (512) that can cooperate to generate magnetic repulsion. The first magnet (511) is located at the end of the first seal (510) away from the first driven rod (540), and the second magnet (512) is located inside the intermediate housing (300). The first magnetic drive assembly can drive the first seal (510) to move to the outside of the intermediate housing (300) to open the second suction channel (312) and make the first abutment end (5101) closely abut the first drive surface assembly. The second seal (520) is movably fitted into the first discharge channel (331) in a direction perpendicular to the movement of the oscillating rod (210). One end of the second seal (520) extending to the outside of the intermediate housing (300) is a second abutment end (5201). The second driven rod (550) is provided with a second driving surface group that can abut against the second abutment end (5201). The second driving surface group includes a second front abutment plane (551), a second abutment slope (552) and a second rear abutment surface (553) connected in sequence along the front-back direction. The inclination direction of the second abutment slope (552) is opposite to the inclination direction of the first abutment slope (542). A second magnetic drive assembly is provided between the intermediate housing (300) and the second seal (520). The second magnetic drive assembly includes a third magnet (521) and a fourth magnet (522) that can cooperate to generate magnetic repulsion. The third magnet (521) is located at the end of the second seal (520) away from the second driven rod (550), and the fourth magnet (522) is located inside the intermediate housing (300). The second magnetic drive assembly can drive the second seal (520) to move outward from the intermediate housing (300) to open the first discharge channel (331) and make the second abutment end (5201) closely abut the second drive surface assembly. When the oscillating rod (210) drives the active rod (530), the diaphragm (340), the first driven rod (540), and the second driven rod (550) to move horizontally away from the suction chamber (310), the second abutting end (5201) of the second seal (520) moves from the second front abutting plane (551) to the second rear abutting surface (553). The second rear abutting surface (553) squeezes the second seal (520) to move into the intermediate housing (300) to close the first discharge channel (331). The first abutting end (5101) of the first seal (510) moves from the first front abutting plane (541) to the first rear abutting surface (543). The first magnetic drive assembly drives the first seal (510) to move out of the intermediate housing (300) to open the second suction channel (312). The air inside the suction chamber (310) is sucked into the transfer chamber (320). When the oscillating rod (210) drives the active rod (530), the diaphragm (340), the first driven rod (540), and the second driven rod (550) to move horizontally closer to the suction chamber (310), the first abutting end (5101) of the first seal (510) moves from the first rear abutting surface (543) to the first front abutting plane (541). The first front abutting plane (541) presses against the first abutting end (5101) and causes the first seal ( 510) Move into the middle housing (300) to close the second suction channel (312), the second abutting end (5201) of the second seal (520) moves from the second rear abutting surface (553) to the second front abutting plane (551), the second magnetic drive assembly drives the second seal (520) to move out of the middle housing (300) to open the first discharge channel (331), and the air inside the transfer chamber (320) is squeezed into the discharge chamber (330).

Images