A noise-reducing RO pump

Abstract

The present application relates to a noise-reducing RO pump, belonging to the technical field of RO pumps, which comprises a pump cover, an intermediate housing and a pump head assembly; the pump head assembly includes a driving body, a diaphragm, a high-pressure diaphragm arranged on the driving body and a driving motor; the pump cover includes a lower cover body with openings at both ends and a top cover for sealingly covering the upper opening of the lower cover body; a partition portion is circumferentially arranged on the inner side wall of the lower cover body, and an annular convex portion for sealingly cooperating with the separation sealing ring of the driving body is arranged at the bottom of the partition portion. The partition portion has a communication port corresponding to the high-pressure through hole of the driving body; the pump cover forms a high-pressure chamber and a low-pressure chamber under the cooperation of the partition portion and the driving body; the partition portion is further provided with a high-pressure passage communicating with the high-pressure chamber and a low-pressure passage communicating with the low-pressure chamber; the high-pressure passage forms a high-pressure interface on the outer side wall of the lower cover body, and the low-pressure passage forms a low-pressure interface on the outer side wall of the lower cover body. The present application can reduce the noise generated by the RO pump during operation.

Description

Technical Field

[0001] The present application relates to the technical field of RO pumps, and in particular to a noise-reducing RO pump. Background Art

[0002] The RO pump, also known as the RO booster pump, RO diaphragm pump, and reverse osmosis booster pump, is a type of DC diaphragm booster pump. The RO pump has the functions of self-priming and boosting, and is one of the key components of the RO water purifier.

[0003] Refer to Figure 1 and Figure 2 , the RO pump includes a pump cover 1, an intermediate housing 2, and a pump head assembly 4 disposed between the pump cover 1 and the intermediate housing 2. The pump head assembly 4 includes a driving body 41 installed between the pump cover 1 and the intermediate housing 2, a diaphragm 42 installed between the driving body 41 and the intermediate housing 2, a high-pressure diaphragm 43 arranged on the driving body 41, and a driving motor 44 disposed on the side of the driving body 41 away from the pump cover 1 for driving the driving body 41. The pump cover 1 is provided with a partition convex ring extending toward the driving body 41 on the inner top surface, and the driving body 41 is provided with a partition sealing ring on the top surface opposite to the partition convex ring. When the driving body 41 and the diaphragm 42 are sequentially pressed between the pump cover 1 and the intermediate housing 2, a low-pressure chamber 8 located outside the partition convex ring and a high-pressure chamber 7 located inside the partition convex ring are formed between the driving body 41 and the pump cover 1, and a driving chamber 9 is formed between the driving body 41 and the diaphragm 42. The area on the upper surface of the driving body 41 corresponding to the low-pressure chamber 8 is the low-pressure area, and the area on the upper surface of the driving body 41 corresponding to the high-pressure chamber 7 is the high-pressure area. The driving body 41 is provided with a low-pressure through hole 411 for communicating the low-pressure chamber 8 and the driving chamber 9 in the low-pressure area, and the driving body 41 is provided with a high-pressure through hole 412 for communicating the high-pressure chamber 7 and the driving chamber 9 in the high-pressure area. The pump cover 1 is further provided with an inlet interface communicating with the low-pressure chamber 8 and an outlet interface communicating with the high-pressure chamber 7. The driving body 41 is provided with a low-pressure valve member in the low-pressure area that forms a one-way valve structure in cooperation with the low-pressure through hole 411. In the high-pressure area of the driving body 41, the high-pressure diaphragm 43 and the high-pressure through hole 412 cooperate to form a one-way valve structure.

[0004] Refer to Figure 2, The operating principle of the pump body assembly of the above RO pump is as follows, where the arrow direction is the flow direction of the driven fluid medium in the pump head assembly 4: The volume of the driving chamber 9 changes periodically under the drive of the driving motor 44. When the volume of the driving chamber 9 increases from small to large, the check valve composed of the low-pressure valve member and the low-pressure through hole 411 is in the open state, and the check valve composed of the high-pressure diaphragm 43 and the high-pressure through hole 412 is in the closed state. The medium entering the interface enters the low-pressure chamber 8 and enters the driving chamber 9 through the low-pressure through hole 411; when the volume of the driving chamber 9 decreases from large to small, the check valve composed of the low-pressure valve member and the low-pressure through hole 411 is in the closed state, and the check valve composed of the high-pressure diaphragm 43 and the high-pressure through hole 412 is in the open state. The medium in the driving chamber 9 enters the high-pressure chamber 7 through the high-pressure through hole 412 and is discharged through the discharge interface.

[0005] Regarding the related technology described above, the inventor believes that when the fluid medium is pumped from the low-pressure chamber 8 through the driving chamber 9 to the high-pressure chamber 7, the fluid medium impacts on the partition convex ring of the pump cover 1, and the partition convex ring transmits the vibration generated by the impact of the fluid medium to the top side of the pump cover 1, which easily causes the pump cover 1 to generate relatively large vibrations. Therefore, relatively large noise will be generated during the operation of the RO pump. Summary of the Invention

[0006] In order to reduce the noise generated during the operation of the RO pump, the present application provides a noise-reducing RO pump.

[0007] A noise-reducing RO pump provided by the present application adopts the following technical solutions:

[0008] A noise-reducing RO pump includes a pump cover, an intermediate housing, and a pump head assembly installed between the pump cover and the intermediate housing; the pump head assembly includes a driving body installed between the pump cover and the intermediate housing, a diaphragm installed between the driving body and the intermediate housing, a high-pressure diaphragm arranged on the driving body, and a driving motor arranged on the side of the driving body away from the pump cover; the pump cover includes a lower cover body with openings at both ends and a top cover for sealing and closing the upper opening of the lower cover body; a partition portion is circumferentially arranged on the inner side wall of the lower cover body, and an annular convex portion for sealing and cooperating with the partition sealing ring of the driving body is arranged at the bottom of the partition portion. The partition portion has a communication port corresponding to the high-pressure through hole of the driving body; the pump cover forms a high-pressure chamber on the side of the partition portion close to the top cover and a low-pressure chamber on the side of the partition portion close to the driving body under the cooperation of the partition portion and the driving body; the partition portion is further provided with a high-pressure channel communicating with the high-pressure chamber and a low-pressure channel communicating with the low-pressure chamber; the high-pressure channel forms a high-pressure interface on the outer side wall of the lower cover body, and the low-pressure channel forms a low-pressure interface on the outer side wall of the lower cover body.

[0009] By adopting the above technical solution, under the operation of the driving motor and the driving body, the fluid medium sequentially passes through the low-pressure interface, the low-pressure channel, the low-pressure chamber, the driving chamber formed between the driving body and the diaphragm, the high-pressure chamber, the high-pressure channel, and the high-pressure interface, thereby realizing the self-priming and pressurization of the fluid medium; when the fluid medium is pressurized through the driving chamber, the fluid medium is pumped into the high-pressure chamber through the communication port, and part of the fluid medium is sprayed on the side wall of the partition part. Since the partition part and the top cover are separately arranged, the vibration generated by the fluid medium sprayed on the side wall of the partition part has little influence when transmitted to the top cover; part of the fluid medium is sprayed on the side wall of the high-pressure chamber of the lower cover body. Since the lower cover body and the top cover are separately arranged, the vibration generated by the fluid medium sprayed on the side wall of the lower cover body has little influence when transmitted to the top cover; part of the fluid medium is pumped into the high-pressure chamber and then merges into the fluid medium in the high-pressure chamber, so that the fluid medium in the high-pressure chamber can buffer the pumped fluid medium, thereby reducing the impact of the pumped fluid medium on the top cover and reducing the vibration transmitted from the lower cover body to the top cover, thereby reducing the amplitude of vibration of the top cover during the operation of the RO pump and reducing the noise generated during the operation of the RO pump.

[0010] Preferably, there is a gap between the partition part and the top cover.

[0011] By adopting the above technical solution, when the fluid medium is pressurized and pumped into the high-pressure chamber through the communication port, part of the fluid medium is sprayed on the side wall of the partition part, and there is a gap between the partition part and the top cover, so that the vibration of the fluid medium impact transmitted by the partition part to the top cover can be reduced, thereby reducing the amplitude of vibration of the top cover during the operation of the RO pump and reducing the noise generated during the operation of the RO pump.

[0012] Preferably, the partition part includes a partition plate, a first convex part arranged on the partition plate, and a second convex part arranged on the partition plate and opposite to the first convex part; the low-pressure channel is opened on the first convex part, and the high-pressure channel is opened on the second convex part; the first convex part and the second convex part form relatively arranged first notches and second notches in the circumferential direction of the communication port.

[0013] By adopting the above technical solution, the lower cover body cooperates with the driving body through the partition plate, the first convex part and the second convex part to separate the lower cover body into a high-pressure chamber and a low-pressure chamber. The first convex part provides an opening platform for opening the low-pressure channel, and the second convex part provides an opening platform for opening the high-pressure channel; the first convex part and the second convex part are formed with a first notch and a second notch in the circumferential direction of the connecting port, so that part of the fluid medium pumped into the high-pressure chamber through the connecting port is sprayed on the side walls of the first convex part and the second convex part, and part of the fluid medium is sprayed toward the side wall of the lower cover body through the first notch and the second notch, or is merged into the fluid medium in the high-pressure chamber through the first notch and the second notch, thereby further reducing the vibration generated by the fluid medium impacting the first convex part and the second convex part and transmitting it to the top cover, and reducing the amplitude of the vibration of the top cover during the operation of the RO pump, thereby reducing the noise generated by the RO pump during the operation.

[0014] Preferably, the side wall of the first convex portion accounts for 1 / 8 to 11 / 72 of the circumferential direction of the communicating opening; the side wall of the second convex portion accounts for 1 / 8 to 11 / 72 of the circumferential direction of the communicating opening.

[0015] By adopting the above technical solution, the side wall of the first convex portion accounts for 1 / 8 to 11 / 72 of the circumferential proportion of the connecting port. Since the low-pressure channel is opened on the first convex portion and the low-pressure channel needs to be used for the inflow of the fluid medium, the aperture of the low-pressure channel should not be too small, so the width of the first convex portion should not be too small. Since the fluid medium will be partially sprayed onto the side wall of the first convex portion when it is pumped into the high-pressure chamber through the connecting port, the first convex portion will transmit the vibration of the fluid medium impact to the lower cover body. In order to reduce the vibration transmitted from the lower cover body to the top cover, the width of the first convex portion should not be too large. Therefore, the width of the first convex portion needs to be set at Within a reasonable range; the circumferential proportion of the side wall of the second protrusion in the connecting port is set at 1 / 8 to 11 / 72. Since the high-pressure channel is opened on the second protrusion and the high-pressure channel needs to be used for the fluid medium to flow out, the aperture of the high-pressure channel should not be too small, and therefore the width of the second protrusion should not be too small. When the fluid medium is pumped into the high-pressure chamber through the connecting port, it will be partially sprayed onto the side wall of the second protrusion. The second protrusion will transmit the vibration of the fluid medium impact to the lower cover body. In order to reduce the vibration transmitted from the lower cover body to the top cover, the width of the second protrusion should not be too large. Therefore, the width of the second protrusion needs to be set within a reasonable range.

[0016] Preferably, the partition plate is obliquely disposed in the lower cover body, and the partition plate is arranged to be inclined upward in a direction away from the communication port.

[0017] By adopting the above technical solution, the partition board is arranged to incline upward in the direction away from the communication port. When the fluid medium is pumped into the high-pressure chamber through the communication port on the partition board, the partition board can play a guiding role for the fluid medium, so that part of the fluid medium can be sprayed onto the side wall of the lower cover body along the partition board, thereby facilitating the diffusion of the flow of the fluid medium.

[0018] Preferably, the partition part further includes a third convex part arranged on the side wall of the lower cover body and on one side of the first convex part; the third convex part has a pressure relief channel and a pressure relief component is arranged in the pressure relief channel; a pressure relief hole communicating with the pressure relief channel is opened on the side of the third convex part facing the high-pressure chamber.

[0019] By adopting the above technical solution, the lower cover body is provided with a third convex part on the partition part. The pressure relief channel of the third convex part can be used for installing the pressure relief component, so as to provide an installation platform for the pressure relief component. When the fluid medium is pumped into the high-pressure chamber after being pressurized by the driving body, the high-pressure chamber can be depressurized through the pressure relief hole and the pressure relief component, so as to reduce the pressure inside the high-pressure chamber and maintain the pressure in the high-pressure chamber.

[0020] Preferably, the circumferential proportion of the side wall of the third convex part at the communication port is 1 / 8 - 11 / 72.

[0021] By adopting the above technical solution, the circumferential proportion of the side wall of the third convex part at the communication port is set to be 1 / 8 - 11 / 72. Since the pressure relief component needs to be arranged in the third convex part, a certain cavity needs to be left for installing the pressure relief component. Therefore, the width of the third convex part should not be too small. Since part of the fluid medium will be sprayed onto the side wall of the third convex part when the fluid medium is pumped into the high-pressure chamber through the communication port, the third convex part will transmit the vibration caused by the impact of the fluid medium to the lower cover body. In order to reduce the vibration transmitted from the lower cover body to the top cover, the width of the third convex part should not be too large. Therefore, the width of the third convex part needs to be set within a reasonable range.

[0022] Preferably, the diameter of the communication port is set to be 3 / 10 - 4 / 5 of the diameter of the lower cover body.

[0023] By adopting the above technical solution, when the fluid medium passes through the driving chamber and is pumped into the high-pressure chamber through the communication port, the communication port provides a pumping port for the fluid medium. Therefore, the diameter of the communication port should not be too small. Therefore, the diameter of the communication port is set to be 3 / 10 - 4 / 5 of the diameter of the lower cover body, which can reduce the pumping pressure of the fluid medium due to the too small diameter of the communication port, thereby reducing the pumping pressure of the fluid medium and the impact force of the fluid medium on the side walls of the partition part and the lower cover body. Thus, the vibration transmitted from the lower cover body to the top cover can be reduced, and the vibration of the top cover during the operation of the RO pump can be reduced, thereby reducing the noise generated during the operation of the RO pump.

[0024] Preferably, the minimum thickness of the side wall of the lower cover body is set to 2.5 mm.

[0025] By adopting the above technical solution, when the fluid medium is pumped into the high-pressure chamber through the communication port, part of the fluid medium is sprayed onto the side wall of the lower cover body. Therefore, the thickness of the side wall of the lower cover body should not be too small. The minimum thickness of the lower cover body is set to 2.5 mm, which can improve the structural stability of the lower cover body, thereby reducing the vibration generated by the impact of the fluid medium on the side wall of the lower cover body. Thus, the vibration transmitted from the lower cover body to the top cover can be reduced, and the vibration of the top cover during the operation of the RO pump can be reduced, and the noise generated during the operation of the RO pump can be reduced.

[0026] Preferably, reinforcing ribs are provided on the side of the top cover facing the lower cover body.

[0027] By adopting the above technical solution, the reinforcing ribs provided on the side of the top cover facing the lower cover body can improve the structural strength of the top cover, thereby improving the structural stability of the top cover. When the fluid medium is pumped into the high-pressure chamber through the communication port, part of the fluid medium merges into the fluid medium in the high-pressure chamber, and the fluid medium in the high-pressure chamber has a buffering effect on the pumped fluid medium. However, the fluid medium still has a small impact on the top cover. Thus, the structural strength of the top cover is improved, the vibration generated by the impact of the fluid medium on the top cover can be reduced, and the noise generated during the operation of the RO pump can be reduced.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. The pump cover of the present application includes a lower cover body and a top cover with openings at both ends. The partition portion is circumferentially provided on the inner side wall of the lower cover body. Since the partition portion and the top cover are separately provided, the vibration generated by the fluid medium sprayed on the side wall of the partition portion has less influence when transmitted to the top cover, and the fluid medium in the high-pressure chamber can also buffer the pumped fluid medium. Thus, the impact of the fluid medium pumped into the high-pressure chamber on the top cover can be reduced.

[0030] 2. There is a gap between the partition portion and the top cover. Part of the fluid medium is sprayed on the side wall of the partition portion, and there is a gap between the partition portion and the top cover, which can reduce the transmission of the vibration caused by the impact of the fluid medium by the partition portion to the top cover. Thus, the amplitude of the vibration of the top cover during the operation of the RO pump can be reduced.

[0031] 3. The partition portion of the present application includes a partition plate, a first convex portion and a second convex portion, and the first convex portion and the second convex portion are formed with a first notch and a second notch arranged relatively in the circumferential direction of the connecting port, so that part of the fluid medium pumped into the high-pressure chamber through the connecting port is sprayed on the side walls of the first convex portion and the second convex portion, and part of the fluid medium is sprayed toward the side wall of the lower cover body through the first notch and the second notch, or is merged into the fluid medium in the high-pressure chamber through the first notch and the second notch, thereby further reducing the vibration generated by the fluid medium impacting the first convex portion and the second convex portion and transmitting it to the top cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic cross-sectional structure diagram of the pump head assembly of the RO pump of the background technology of this application Figure 1 .

[0033] Figure 2 This is a schematic cross-sectional structure diagram of the pump head assembly of the RO pump of the background technology of this application Figure 2 .

[0034] Figure 3 It is a schematic cross-sectional structure diagram of a noise reduction RO pump according to an embodiment of the present application.

[0035] Figure 4 This is a schematic diagram of the lower cover structure of a noise reduction RO pump in an embodiment of the present application. Figure 1 .

[0036] Figure 5 It is a schematic structural diagram of a pump head of a noise-reducing RO pump according to an embodiment of the present application.

[0037] Figure 6 This is a schematic diagram of the lower cover structure of a noise reduction RO pump in an embodiment of the present application. Figure 2 .

[0038] Figure 7 It is a schematic diagram of the cross-sectional structure of the lower cover of a noise-reducing RO pump according to an embodiment of the present application.

[0039] Figure 8 It is a partial explosion schematic diagram of a noise reduction RO pump according to an embodiment of the present application.

[0040] Description of reference numerals: 1. Pump cover; 2. Intermediate housing; 3. Lower housing; 4. Pump head assembly; 41. Driving body; 411. Low-pressure through hole; 412. High-pressure through hole; 42. Diaphragm; 43. High-pressure diaphragm; 44. Driving motor; 5. Lower cover body; 51. Partition part; 511. Annular convex part; 512. Communication port; 513. High-pressure channel; 514. Low-pressure channel; 515. High-pressure interface; 516. Low-pressure interface; 52. Partition plate; 53. First convex part; 54. Second convex part; 55. Third convex part; 551. Pressure relief channel; 552. Pressure relief assembly; 5521. Pressure relief valve; 5522. Pressure relief spring; 553. Pressure relief hole; 554. Installation opening; 555. Pressure relief plug; 56. First notch; 57. Second notch; 6. Top cover; 61. Reinforcing rib; 7. High-pressure chamber; 8. Low-pressure chamber; 9. Driving chamber. Detailed implementation manners

[0041] The following further describes the present application in detail with reference to the Figures 1-8 accompanying drawings.

[0042] An embodiment of the present application discloses a noise-reducing RO pump. Refer to Figure 3 , the noise-reducing RO pump includes a pump cover 1, an intermediate housing 2, a lower housing 3, and a pump head assembly 4 installed between the pump cover 1 and the intermediate housing 2.

[0043] Refer to Figure 3 , the pump head assembly 4 includes a driving body 41 installed between the pump cover 1 and the intermediate housing 2, a diaphragm 42 installed between the driving body 41 and the intermediate housing 2, a high-pressure diaphragm 43 arranged on the driving body 41, and a driving motor 44 arranged on the side of the driving body 41 away from the pump cover 1.

[0044] Refer to Figure 3, the pump cover 1 includes a lower cover body 5 with openings at both ends and a top cover 6 for sealing and closing the upper opening of the lower cover body 5. The intermediate housing 2 seals and closes the lower opening of the lower cover body 5. A partition portion 51 is circumferentially provided on the inner sidewall of the lower cover body 5, and an annular convex portion 511 for sealingly mating with the separation sealing ring of the driving body 41 is provided at the bottom of the partition portion 51. With the cooperation of the partition portion 51 and the driving body 41, a high-pressure chamber 7 is formed on the side of the partition portion 51 close to the top cover 6, and a low-pressure chamber 8 is formed on the side of the partition portion 51 close to the driving body 41. A driving chamber 9 is formed between the driving body 41 and the diaphragm 42. The chamber on the upper surface of the driving body 41 corresponding to the low-pressure chamber 8 is set as a low-pressure area, and the area on the upper surface of the driving body 41 corresponding to the high-pressure chamber 7 is set as a high-pressure area. In this embodiment, the outer circumferential surface of the upper surface of the driving body 41 corresponds to the low-pressure chamber 8 to form a low-pressure area, and the inner circumferential surface of the upper surface of the driving body 41 corresponds to the high-pressure chamber 7 to form a high-pressure area. The driving body 41 is provided with a low-pressure through hole 411 for communicating the low-pressure chamber 8 and the driving chamber 9 in the low-pressure area, and the driving body 41 is provided with a high-pressure through hole 412 for communicating the high-pressure chamber 7 and the driving chamber 9 in the high-pressure area. The partition portion 51 has a communication port 512 corresponding to the high-pressure through hole 412 of the driving body 41. The partition portion 51 is further provided with a high-pressure passage 513 communicating with the high-pressure chamber 7 and a low-pressure passage 514 communicating with the low-pressure chamber 8. The high-pressure passage 513 forms a high-pressure interface 515 on the outer sidewall of the lower cover body 5, and the low-pressure passage 514 forms a low-pressure interface 516 on the outer sidewall of the lower cover body 5. Under the operation of the driving motor 44 and the driving body 41, the fluid medium sequentially passes through the low-pressure interface 516, the low-pressure passage 514, the low-pressure chamber 8, the driving chamber 9 formed between the driving body 41 and the diaphragm 42, the high-pressure chamber 7, the high-pressure passage 513, and the high-pressure interface 515, thereby realizing the self-priming and pressurization of the fluid medium.

[0045] See Figure 3 and Figure 4 , the partition portion 51 includes a partition plate 52, a first convex portion 53 arranged on the partition plate 52, a second convex portion 54 arranged on the partition plate 52 and opposite to the first convex portion 53, and a third convex portion 55 arranged on the partition plate 52 and on one side of the first convex portion 53. In this embodiment, the partition plate 52, the first convex portion 53, the second convex portion 54, and the third convex portion 55 are all integrally formed with the lower cover body 5. There are gaps between the top sides of the first convex portion 53, the second convex portion 54, and the third convex portion 55 and the top cover 6. When the fluid medium is pumped into the high-pressure chamber 7 through the communication port 512 after being pressurized, part of the fluid medium sprays on the sidewall of the partition portion 51, and there is a gap between the partition portion 51 and the top cover 6, so that the vibration of the fluid medium impact transmitted by the partition portion 51 to the top cover 6 can be reduced, thereby reducing the vibration amplitude of the top cover 6 during the operation of the RO pump and reducing the noise generated during the operation of the RO pump.

[0046] See Figure 3 Figure 3 , a low-pressure passage 514 is formed on the first convex portion 53, and a high-pressure passage 513 is formed on the second convex portion 54. The lower cover 5 cooperates with the driving body 41 through the partition plate 52, the first convex portion 53 and the second convex portion 54, dividing the lower cover 5 into a high-pressure chamber 7 and a low-pressure chamber 8. The first convex portion 53 provides a platform for forming the low-pressure passage 514, and the second convex portion 54 provides a platform for forming the high-pressure passage 513.

[0047] See Figure 3 and Figure 5 Figure 5 , the third convex portion 55 has a pressure relief passage 551 and a pressure relief component 552 is arranged in the pressure relief passage 551. A pressure relief hole 553 communicating with the pressure relief passage 551 is formed on one side of the third convex portion 55 facing the high-pressure chamber 7. In this embodiment, an installation opening 554 is formed on the outer sidewall of the lower cover 5 for the pressure relief passage 551, and a pressure relief plug 555 for sealing the installation opening 554 is arranged on the lower cover 5. The pressure relief component 552 includes a pressure relief valve 5521 arranged in the pressure relief passage 551 and a pressure relief spring 5522 sleeved outside the pressure relief valve 5521. Thus, the third convex portion 55 can provide an installation platform for the pressure relief component 552. When the fluid medium is pressurized by the driving body 41 and pumped into the high-pressure chamber 7, the high-pressure chamber 7 can be pressure-relieved through the pressure relief hole 553 and the pressure relief component 552, thereby reducing the pressure inside the high-pressure chamber 7 and maintaining the pressure in the high-pressure chamber 7.

[0048] See Figure 4 Figure 4 , a communication port 512 is formed in the middle of the partition plate 52, and the first convex portion 53 and the second convex portion 54 are arranged on opposite sides of the communication port 512. The third convex portion 55 is arranged on one side of the first convex portion 53 and on the side edge of the communication port 512, such that a first notch 56 is formed in the circumferential direction of the communication port 512 between the first convex portion 53 and the second convex portion 54, and a second notch 57 opposite to the first notch 56 is formed in the circumferential direction of the communication port 512 between the second convex portion 54 and the third convex portion 55. Thus, part of the fluid medium pumped into the high-pressure chamber 7 through the communication port 512 is sprayed on the sidewalls of the first convex portion 53, the second convex portion 54 and the third convex portion 55, and part of the fluid medium is sprayed towards the sidewall of the lower cover 5 through the first notch 56 and the second notch 57, or is incorporated into the fluid medium in the high-pressure chamber 7 through the first notch 56 and the second notch 57, thereby further reducing the vibration generated by the fluid medium impacting the first convex portion 53 and the second convex portion 54 from being transmitted to the top cover 6, reducing the amplitude of vibration of the top cover 6 during the operation of the RO pump, and thus reducing the noise generated during the operation of the RO pump.

[0049] See Figure 6, the circumferential proportion of the side wall of the first convex portion 53 at the communication port 512 is 1 / 8 to 11 / 72. In this embodiment, the center of the communication port 512 coincides with the center of the lower cover body 5. When the fluid medium is pumped into the high-pressure chamber 7 through the communication port 512, part of the fluid medium will be ejected onto the side wall of the first convex portion 53, and the first convex portion 53 will transmit the vibration caused by the impact of the fluid medium to the lower cover body 5. In order to reduce the vibration transmitted from the lower cover body 5 to the top cover 6, the width of the first convex portion 53 should not be too large. Since the low-pressure channel 514 is opened on the first convex portion 53 and the low-pressure channel 514 is used for the fluid medium to flow in, the width of the first convex portion 53 should not be too small. Therefore, the width of the first convex portion 53 needs to be set within a reasonable range.

[0050] See Figure 6 , the circumferential proportion of the side wall of the second convex portion 54 at the communication port 512 is 1 / 8 to 11 / 72. When the fluid medium is pumped into the high-pressure chamber 7 through the communication port 512, part of the fluid medium will be ejected onto the side wall of the second convex portion 54, and the second convex portion 54 will transmit the vibration caused by the impact of the fluid medium to the lower cover body 5. In order to reduce the vibration transmitted from the lower cover body 5 to the top cover 6, the width of the second convex portion 54 should not be too large. Since the high-pressure channel 513 is opened on the second convex portion 54 and the high-pressure channel 513 is used for the fluid medium to flow out, the width of the second convex portion 54 should not be too small. Therefore, the width of the second convex portion 54 needs to be set within a reasonable range.

[0051] See Figure 6 , the circumferential proportion of the side wall of the third convex portion 55 at the communication port 512 is 1 / 8 to 11 / 72. When the fluid medium is pumped into the high-pressure chamber 7 through the communication port 512, part of the fluid medium will be ejected onto the side wall of the third convex portion 55, and the third convex portion 55 will transmit the vibration caused by the impact of the fluid medium to the lower cover body 5. In order to reduce the vibration transmitted from the lower cover body 5 to the top cover 6, the width of the third convex portion 55 should not be too large. Since a pressure relief channel 551 is opened in the third convex portion 55 and a pressure relief component 552 is arranged in the pressure relief channel 551, a certain cavity needs to be reserved for installing the pressure relief component 552. Therefore, the width of the third convex portion 55 should not be too small. Therefore, the width of the third convex portion 55 needs to be set within a reasonable range.

[0052] See Figure 6, the diameter of the communication port 512 is set to be 3 / 10 to 4 / 5 of the diameter of the lower cover body 5. In this embodiment, the inner cavity of the lower cover body 5 is arranged in a petal shape, and the diameter of the communication port 512 is set to be 3 / 10 to 4 / 5 of the minimum diameter of the inner cavity of the lower cover body 5. When the fluid medium passes through the driving chamber 9 and is pumped into the high-pressure chamber 7 through the communication port 512, the communication port 512 provides a pumping port for the fluid medium. Therefore, the diameter of the communication port 512 should not be too small. Thus, the diameter of the communication port 512 is set to be 3 / 10 to 4 / 5 of the diameter of the lower cover body 5, which can reduce the excessive pumping pressure of the fluid medium after passing through the communication port 512 due to the too small diameter of the communication port 512. Thereby, the pumping pressure of the fluid medium can be reduced, and the impact force of the fluid medium on the partition portion 51 and the side wall of the lower cover body 5 can be reduced. Thus, the vibration transmitted from the lower cover body 5 to the top cover 6 can be reduced, the vibration of the top cover 6 during the operation of the RO pump can be reduced, and the noise generated during the operation of the RO pump can be reduced.

[0053] See Figure 6 , the minimum thickness of the side wall of the lower cover body 5 is set to 2.5 mm. In this embodiment, the side wall thickness of the lower cover body 5 is generally 2.5 to 4 mm. Since part of the fluid medium is sprayed onto the side wall of the lower cover body 5 when the fluid medium is pumped into the high-pressure chamber 7 through the communication port 512, the side wall thickness of the lower cover body 5 should not be too small. The minimum thickness of the lower cover body 5 is set to 2.5 mm, which can improve the structural stability of the lower cover body 5. Thereby, the vibration generated by the impact of the fluid medium on the side wall of the lower cover body 5 can be reduced. Thus, the vibration transmitted from the lower cover body 5 to the top cover 6 can be reduced, the vibration of the top cover 6 during the operation of the RO pump can be reduced, and the noise generated during the operation of the RO pump can be reduced.

[0054] See Figure 7 , the partition plate 52 is inclined and arranged in the lower cover body 5. The partition plate 52 is arranged to incline upward along the direction away from the communication port 512. In this embodiment, the inclination angle of the partition plate 52 with respect to the horizontal plane is set to 15 to 35°, so that the partition plate 52 is in a horn shape that spreads upward. When the fluid medium is pumped into the high-pressure chamber 7 through the communication port 512 on the partition plate 52, the partition plate 52 can play a guiding role for the fluid medium, so that part of the fluid medium can be sprayed onto the side wall of the lower cover body 5 along the partition plate 52, which can facilitate the diffusion of the flow of the fluid medium.

[0055] See Figure 8, on one side of the top cover 6 facing the lower cover body 5, there is a reinforcing rib 61. The provision of the reinforcing rib 61 on one side of the top cover 6 facing the lower cover body 5 can improve the structural strength of the top cover 6, thereby improving the stability of the structure of the top cover 6. When the fluid medium is pumped into the high-pressure chamber 7 through the communication port 512, part of the fluid medium merges into the fluid medium in the high-pressure chamber 7. The fluid medium in the high-pressure chamber 7 exerts a buffering effect on the pumped fluid medium, but the fluid medium still has a small impact on the top cover 6. Thus, by improving the structural strength of the top cover 6, the vibration generated by the impact of the fluid medium on the top cover 6 can be reduced, and thereby the noise generated during the operation of the RO pump can be reduced.

[0056] The implementation principle of a noise-reducing RO pump according to an embodiment of the present application is as follows:

[0057] When the volume of the driving chamber 9 changes from small to large under the drive of the driving motor 44, the fluid medium enters the low-pressure chamber 8 from the low-pressure interface 516 and flows into the driving chamber 9 through the low-pressure through-hole 411 on the driving body 41; when the volume of the driving chamber 9 changes from large to small under the drive of the driving motor 44, the fluid medium flows from the driving chamber 9 into the high-pressure chamber 7 through the high-pressure through-hole 412 on the driving body 41 and is discharged through the high-pressure interface 515.

[0058] When the fluid medium is pressurized through the driving chamber 9, the fluid medium is pumped into the high-pressure chamber 7 through the communication port 512. Part of the fluid medium is sprayed on the side wall of the partition portion 51. Since the partition portion 51 and the top cover 6 are separately provided, the vibration generated by the fluid medium sprayed on the side wall of the partition portion 51 has little influence when transmitted to the top cover 6; part of the fluid medium is sprayed on the side wall of the high-pressure chamber 7 of the lower cover body 5. Since the lower cover body 5 and the top cover 6 are separately provided, the vibration generated by the fluid medium sprayed on the side wall of the lower cover body 5 has little influence when transmitted to the top cover 6; part of the fluid medium is pumped into the high-pressure chamber 7 and then merges into the fluid medium in the high-pressure chamber 7. Thus, the fluid medium in the high-pressure chamber 7 can play a buffering role on the pumped fluid medium, thereby reducing the impact of the fluid medium pumped into the high-pressure chamber 7 on the top cover 6 and also reducing the vibration transmitted from the lower cover body 5 to the top cover 6. Therefore, the amplitude of vibration of the top cover 6 during the operation of the RO pump can be reduced, and the noise generated during the operation of the RO pump can be reduced.

[0059] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A noise-reducing RO pump, comprising a pump cover (1), an intermediate housing (2), and a pump head assembly (4) installed between the pump cover (1) and the intermediate housing (2); the pump head assembly (4) includes a driving body (41) installed between the pump cover (1) and the intermediate housing (2), a diaphragm (42) installed between the driving body (41) and the intermediate housing (2), a high-pressure diaphragm (43) arranged on the driving body (41), and a driving motor (44) provided on the side of the driving body (41) away from the pump cover (1). It is characterized in that the pump cover (1) includes a lower cover body (5) with openings at both ends and a top cover (6) for sealing and closing the upper end opening of the lower cover body (5); a partition portion (51) is circumferentially arranged on the inner side wall of the lower cover body (5), and an annular convex portion (511) for sealingly cooperating with the separation sealing ring of the driving body (41) is arranged at the bottom of the partition portion (51), and the partition portion (51) has a communication port (512) corresponding to the high-pressure through hole (412) of the driving body (41). The pump cover (1) forms a high-pressure chamber (7) on the side of the partition portion (51) close to the top cover (6) and a low-pressure chamber (8) on the side of the partition portion (51) close to the driving body (41) in cooperation with the driving body (41); the partition portion (51) is further provided with a high-pressure channel (513) communicating with the high-pressure chamber (7) and a low-pressure channel (514) communicating with the low-pressure chamber (8); the high-pressure channel (513) forms a high-pressure interface (515) on the outer side wall of the lower cover body (5), and the low-pressure channel (514) forms a low-pressure interface (516) on the outer side wall of the lower cover body (5); there is a gap between the partition portion (51) and the top cover (6). The partition portion (51) includes a partition plate (52), a first convex portion (53) arranged on the partition plate (52), and a second convex portion (54) arranged on the partition plate (52) and opposite to the first convex portion (53); the low-pressure channel (514) is opened on the first convex portion (53), and the high-pressure channel (513) is opened on the second convex portion (54); the first convex portion (53) and the second convex portion (54) form a relatively arranged first notch (56) and second notch (57) in the circumferential direction of the communication port (512).

2. A noise-reducing RO pump according to claim 1, It is characterized in that the side wall of the first convex portion (53) accounts for 1 / 8 - 11 / 72 in the circumferential direction of the communication port (512); the side wall of the second convex portion (54) accounts for 1 / 8 - 11 / 72 in the circumferential direction of the communication port (512).

3. A noise-reducing RO pump according to claim 1, It is characterized in that the partition plate (52) is inclined in the lower cover body (5), and the partition plate (52) is arranged to incline upward along the direction away from the communication port (512).

4. A noise-reducing RO pump according to claim 1, characterized in that, the partition part (51) further includes a third convex part (55) arranged on the side wall of the lower cover body (5) and on one side of the first convex part (53); the third convex part (55) has a pressure relief channel (551) and a pressure relief component (552) is arranged in the pressure relief channel (551); a pressure relief hole (553) communicating with the pressure relief channel (551) is formed on one side of the third convex part (55) facing the high-pressure chamber (7).

5. A noise-reducing RO pump according to claim 4, characterized in that, the circumferential proportion of the side wall of the third convex part (55) at the communication port (512) is 1 / 8 to 11 / 72.

6. A noise-reducing RO pump according to claim 1, characterized in that, the caliber of the communication port (512) is set to be 3 / 10 to 4 / 5 of the caliber of the lower cover body (5).

7. A noise-reducing RO pump according to claim 1, characterized in that, the minimum thickness of the side wall of the lower cover body (5) is set to 2.5 mm.

8. A noise-reducing RO pump according to claim 1, characterized in that, a reinforcing rib (61) is arranged on one side of the top cover (6) facing the lower cover body (5).

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