CN111043026A - Anti-backflow sealing assembly and diaphragm pump - Google Patents
Anti-backflow sealing assembly and diaphragm pump Download PDFInfo
- Publication number
- CN111043026A CN111043026A CN202010004354.9A CN202010004354A CN111043026A CN 111043026 A CN111043026 A CN 111043026A CN 202010004354 A CN202010004354 A CN 202010004354A CN 111043026 A CN111043026 A CN 111043026A
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- China
- Prior art keywords
- piston
- water
- valve seat
- assembly
- diaphragm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 96
- 230000002265 prevention Effects 0.000 claims abstract description 6
- 239000012528 membrane Substances 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 241001122767 Theaceae Species 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/109—Valves; Arrangement of valves inlet and outlet valve forming one unit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/025—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel
- F04B43/026—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel each plate-like pumping flexible member working in its own pumping chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/04—Pumps having electric drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/102—Disc valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
本发明公开了一种防回流密封组件及隔膜泵，防回流密封组件包括具有均布且一一对应的进水口和出水口的阀座、与阀座固定连接且具有相对应的进水孔和出水孔的密封盖、穿设在阀座上且用于独立密封每一出水口的多瓣式膜片和穿设于阀座的进水口处的进水阀片；隔膜泵包括通过组装螺栓依次连接的防回流密封组件、可压缩拉伸运动实现进水和排水的活塞组件和用于驱动活塞组件运动的驱动组件。本发明有效防止膜片出水处造成回流，增加了出水量，提高隔膜泵工作效率。
The invention discloses a backflow prevention sealing component and a diaphragm pump. The backflow prevention sealing component comprises a valve seat with uniformly distributed and one-to-one corresponding water inlets and water outlets, a valve seat fixedly connected with the valve seat and having corresponding water inlet holes and a valve seat. The sealing cover of the water outlet, the multi-lobed diaphragm that is worn on the valve seat and used to independently seal each water outlet, and the water inlet valve plate that is worn at the water inlet of the valve seat; The connected anti-backflow sealing assembly, the piston assembly that can compress and stretch the movement to realize water intake and drainage, and the driving assembly for driving the movement of the piston assembly. The invention effectively prevents backflow at the water outlet of the diaphragm, increases the water outlet, and improves the working efficiency of the diaphragm pump.
Description
Technical Field
The invention relates to a sealing assembly and a diaphragm pump, in particular to an anti-backflow sealing assembly and a diaphragm pump.
Background
Diaphragm water pumps are widely used in the market for industrial products such as drinking water dispensers, coffee machines, water purifiers, air purifiers, mobile bathing machines, tea brewing machines, water circulation equipment, particularly in the field of drinking water, and the like. The body type is small, the variety is various, the performance requirement difference is large, and the like.
The miniature diaphragm water pump on the current market has obvious shortcomings due to structural factors:
(1) the water outlet backflow-preventing membrane is an integral body, if the membrane is not forcibly compressed and divided by a structure, each piston cavity can interfere with each other when water enters and exits, and when one cavity performs water exiting motion, the cavity beside the piston cavity performs water absorbing motion, so that backflow can be generated, the water yield is reduced, and the working efficiency is greatly reduced; however, if the structure is forcibly used for compressing and dividing, the water outlet resistance is increased, the water outlet quantity is reduced, and the working efficiency is also reduced.
(2) And the diaphragm pump which can reach large flow (more than or equal to 700ml/min) in the current market is used for compressing the anti-backflow diaphragm of the water outlet and preventing the diaphragm from being flushed by water flow; the existing diaphragm pump requires the interference assembly of an anti-backflow diaphragm and a sealing cover, and the sealing cover is adopted to compress the diaphragm; ultrasonic welding is to transmit high-frequency vibration waves to the surfaces of two objects to be welded, and the surfaces of the two objects are mutually rubbed under the condition of pressurization to form fusion between molecular layers; if the sealing cover and the valve seat are connected in the conventional diaphragm pump by ultrasonic welding and the interference fit of the diaphragm and the sealing cover is required to be ensured, the diaphragm can be damaged by the high-frequency vibration of the ultrasonic welding; therefore, the ultrasonic welding process cannot be applied to the diaphragm pump with the independent water-outlet anti-backflow diaphragm, and the sealing cover of the conventional diaphragm pump needs to be in the form of a sealing ring, so that the cost is increased, and the requirement on the manufacturing process is high.
Thus, there is a need to solve the above problems.
Disclosure of Invention
The purpose of the invention is as follows: the first objective of the present invention is to provide a backflow-preventing sealing assembly that can prevent backflow and increase water output for each water outlet.
A second object of the present invention is to provide a diaphragm pump based on the backflow prevention seal assembly.
The technical scheme is as follows: in order to achieve the above purpose, the invention discloses an anti-backflow sealing assembly, which comprises a valve seat, a sealing cover, a multi-flap membrane and a water inlet valve plate, wherein the valve seat is provided with a water inlet and a water outlet which are uniformly distributed and in one-to-one correspondence, the sealing cover is fixedly connected with the valve seat and is provided with a water inlet hole and a water outlet hole which are corresponding, the multi-flap membrane is arranged on the valve seat in a penetrating mode and is used for independently sealing each water outlet, and the water inlet.
The sealing cover and the valve seat are fixed by ultrasonic welding.
Preferably, the multi-petal diaphragm comprises a diaphragm rod arranged on the valve seat in a penetrating manner and a plurality of independent diaphragms uniformly distributed at one end of the diaphragm rod, and a diaphragm clearance groove is reserved between every two adjacent diaphragms.
Moreover, the membrane rod is provided with a convex ring, and a water outlet of the valve seat is provided with a through hole step which is matched with the convex ring to realize the stop of the membrane in the vertical direction.
Furthermore, the valve seat is provided with a convex rib which is matched with the valve gap groove to realize the stop of the rotation direction of the diaphragm.
The invention relates to a diaphragm pump based on an anti-backflow sealing assembly, which comprises the anti-backflow sealing assembly, a piston assembly and a driving assembly, wherein the anti-backflow sealing assembly, the piston assembly and the driving assembly are sequentially connected through assembling bolts, the piston assembly can realize water inlet and water discharge through compressible stretching movement, and the driving assembly is used for driving the piston assembly to move.
The piston assembly comprises a piston support, porous pistons, a multi-fork turntable and a turntable shaft, wherein the porous pistons are arranged on the piston support, piston holes and piston pins correspond to the water inlets in number one by one, the multi-fork turntable is connected with the piston pins of the porous pistons, and the turntable shaft penetrates through the multi-fork turntable.
Preferably, the driving assembly comprises a base, a motor fixed on the base and an eccentric wheel connected with an output shaft of the motor, the eccentric wheel is connected with the turntable shaft, the motor is started to drive the eccentric wheel to rotate, and the turntable shaft and the multi-fork turntable drive the porous piston to reciprocate vertically to realize piston compression and stretching.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:
firstly, each valve of the multi-valve type diaphragm is mutually independent, each valve corresponds to a water outlet of one cavity, three water outlets are not influenced mutually, one cavity is used for draining water, the other two cavities can normally absorb water, and the other two cavities can be completely sealed because the valves of the multi-valve type diaphragm are mutually independent, so that a part of water drained from the cavity can be prevented from flowing back to the other two cavities, the due water yield of the multi-valve type diaphragm is greatly improved, and the working efficiency of the diaphragm pump is improved; in addition, the change of the fixing mode of the multi-flap type diaphragm in the invention enables the ultrasonic welding process to be applied to the connecting structure of the sealing cover and the valve seat, thereby saving a sealing ring, reducing the cost and filling the blank that the prior large-flow water pump cannot use ultrasonic welding.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a cross-sectional view of the present invention;
FIG. 4 is a schematic structural view of a multi-lobed diaphragm of the present invention;
FIG. 5 is a schematic view of the construction of the valve seat of the present invention;
FIG. 6 is a schematic view of the assembly of the valve seat and the multi-lobed diaphragm of the present invention;
fig. 7 is a schematic view showing the assembly of the valve body and the sealing cap according to the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
As shown in figure 1, the diaphragm pump comprises a backflow prevention sealing assembly, a piston assembly, a driving assembly and an assembling bolt 5, wherein the backflow prevention sealing assembly, the piston assembly and the driving assembly are sequentially assembled and connected through the assembling bolt 5 to form the diaphragm pump.
As shown in fig. 2 and 3, the anti-backflow sealing assembly comprises a valve seat 1, a sealing cover 2, a multi-petal diaphragm 3 and a water inlet valve 4, as shown in fig. 5, the valve seat 1 is provided with a water inlet 101 and a water outlet 102 which are uniformly distributed and correspond to each other one by one, and an inner cavity for storing water is arranged in the valve seat 1; wherein the number of the water inlets 101 and the water outlets 102 is 3 respectively. As shown in fig. 7, the sealing cover 2 is fixedly connected with the valve seat 1 by ultrasonic welding, wherein a is an ultrasonic welding position. The sealing cover 2 is provided with a corresponding water inlet 201 and a corresponding water outlet 202, the number of the water inlet 201 and the number of the water outlet 202 are respectively 1, the water inlet 201 and the water outlet 202 are both distributed above the sealing cover 2, the water inlet 201 is distributed in the edge area, and the water outlet 202 is arranged in the center. The multi-flap type membrane 3 is arranged on the valve seat 1 in a penetrating way and can be used for independently sealing each water outlet 102; as shown in fig. 4 and 6, the multi-petal diaphragm 3 includes a diaphragm rod 301 penetrating the valve seat 1 and a plurality of mutually independent diaphragms 302 uniformly distributed at one end of the diaphragm rod, and a diaphragm clearance groove 303 is reserved between adjacent diaphragms; the membrane rod 301 is provided with a convex ring 304, and the water outlet 102 of the valve seat 1 is provided with a through hole step 103 which is matched with the convex ring to realize the stop of the membrane in the vertical direction; the valve seat 1 is provided with a rib 104 which is matched with the valve gap groove 303 to realize the stop of the rotation direction of the diaphragm. The water inlet valve plate 4 penetrates through each water inlet 101 of the valve seat 1, and the water inlet valve plate 4 plays a role of a one-way valve to prevent water from flowing out of the water inlets when the piston is compressed.
The piston assembly comprises a piston support 6, a porous piston 7, a multi-fork rotary table 8 and a rotary table shaft 9, wherein the porous piston 7 is arranged on the piston support 6, the porous piston 7 is provided with a plurality of piston holes which are uniformly distributed and piston pins with corresponding number, and the number of the piston holes and the number of the piston pins are respectively 3. A plurality of connecting holes are uniformly distributed on the multi-fork turntable, the number of the connecting holes is 3, and each piston pin of the porous piston 7 correspondingly penetrates through each connecting hole of the multi-fork turntable; the turntable shaft 9 is fixedly connected with the multi-fork turntable 8, and the turntable shaft and the multi-fork turntable can be molded into a whole.
The driving assembly comprises a base 10, a motor 11 fixed on the base through a bolt 13 and an eccentric wheel 12 connected with an output shaft of the motor, wherein the eccentric wheel 12 is connected with a turntable shaft 9, the motor 11 starts to drive the eccentric wheel 12 to rotate, and the turntable shaft 9 and a multi-fork turntable 8 drive a porous piston 7 to reciprocate vertically to realize piston compression and stretching; the motor of the invention drives the eccentric wheel to do reciprocating motion in a circulating way, the eccentric wheel drives the multi-fork turntable to do reciprocating motion in a Z direction, the multi-fork turntable drives the porous piston to do circulating compression motion in the Z direction, and the action of water absorption and water discharge is continuously carried out in the cavity compression motion.
When a motor is electrified to work, the eccentric wheel is driven to do reciprocating motion in a circulating way, the eccentric wheel drives the multi-fork turntable to do reciprocating motion in a Z direction, the multi-fork turntable drives the porous piston to do Z-direction cyclic compression motion, the porous piston performs water absorption action, the water inlet valve plate is opened, water is absorbed into a piston cavity of the porous piston from the water inlet hole, the eccentric wheel continues rotating, the porous piston cavity is compressed, one diaphragm of the multi-diaphragm type diaphragm is opened, the water is pressed into the water outlet cavity from the porous piston cavity and then is discharged from the water outlet hole; because each valve of the multi-valve diaphragm is independent, each valve corresponds to the water outlet of one cavity, three water outlets are not influenced mutually, one cavity is used for draining water, the other two cavities can normally absorb water, because the valves of the multi-valve diaphragm are independent, water flowing from one water outlet to the upper surface of the multi-valve diaphragm can further compress the other two valves of the multi-valve diaphragm, so that the other two cavities which absorb water are more completely sealed, thereby avoiding that part of water drained from the cavity flows back into the other two cavities, greatly improving the due water yield of the multi-valve diaphragm and improving the working efficiency of the diaphragm pump; in addition, the change of the fixing mode of the multi-flap type diaphragm in the invention enables the ultrasonic welding process to be applied to the connecting structure of the sealing cover and the valve seat, thereby saving a sealing ring, reducing the cost and filling the blank that the prior large-flow water pump cannot use ultrasonic welding.
Claims (8)
1. A backflow-prevention seal assembly, comprising: the water inlet valve comprises a valve seat (1) with uniformly distributed water inlets (101) and water outlets (102) in one-to-one correspondence, a sealing cover (2) fixedly connected with the valve seat (1) and provided with corresponding water inlet holes (201) and water outlet holes (202), a multi-flap type membrane (3) penetrating the valve seat (1) and used for independently sealing each water outlet (102), and a water inlet valve plate (4) penetrating the water inlet (101) of the valve seat (1).
2. The backflow-prevention seal assembly of claim 1, wherein: the sealing cover (2) and the valve seat (1) are fixed by ultrasonic welding.
3. The backflow-prevention seal assembly of claim 1, wherein: the multi-flap type diaphragm (3) comprises a diaphragm rod (301) arranged on the valve seat (1) in a penetrating mode and a plurality of mutually independent diaphragms (302) uniformly distributed at one end of the diaphragm rod, and a diaphragm clearance groove (303) is reserved between every two adjacent diaphragms.
4. The backflow-prevention seal assembly of claim 3, wherein: the membrane rod (301) is provided with a convex ring (304), and a water outlet (102) of the valve seat (1) is provided with a through hole step (103) which is matched with the convex ring to realize the stop of the membrane in the vertical direction.
5. The backflow-prevention seal assembly of claim 3, wherein: the valve seat (1) is provided with a convex rib (104) which is matched with the valve disc clearance groove (303) to realize the stop of the rotation direction of the diaphragm.
6. A diaphragm pump based on the backflow prevention seal assembly of any of claims 1 to 5, wherein: the anti-backflow water pump comprises an anti-backflow sealing assembly, a piston assembly and a driving assembly, wherein the anti-backflow sealing assembly, the piston assembly and the driving assembly are sequentially connected through an assembling bolt (5), the piston assembly can realize water inlet and water discharge through compressible stretching movement, and the driving assembly is used for driving the piston assembly to move.
7. The diaphragm pump of claim 6, wherein: the piston assembly comprises a piston support (6), porous pistons (7) which are arranged on the piston support and correspond to the piston holes, the piston pins and the water inlets in a one-to-one mode, a multi-fork turntable (8) connected with the piston pins of the porous pistons, and a turntable shaft (9) arranged on the multi-fork turntable in a penetrating mode.
8. The diaphragm pump of claim 7, wherein: the driving assembly comprises a base (10), a motor (11) fixed on the base and an eccentric wheel (12) connected with an output shaft of the motor, the eccentric wheel (12) is connected with a turntable shaft (9), the motor (11) starts the driving eccentric wheel (12) to rotate, and the turntable shaft (9) and the multi-fork turntable (8) drive the porous piston (7) to reciprocate vertically to realize piston compression and stretching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010004354.9A CN111043026A (en) | 2020-01-03 | 2020-01-03 | Anti-backflow sealing assembly and diaphragm pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010004354.9A CN111043026A (en) | 2020-01-03 | 2020-01-03 | Anti-backflow sealing assembly and diaphragm pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111043026A true CN111043026A (en) | 2020-04-21 |
Family
ID=70243521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010004354.9A Pending CN111043026A (en) | 2020-01-03 | 2020-01-03 | Anti-backflow sealing assembly and diaphragm pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111043026A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828291A (en) * | 2020-08-10 | 2020-10-27 | 浙江科博电器有限公司 | Seal assembly with bidirectional non-return function and diaphragm pump |
| CN111927758A (en) * | 2020-09-14 | 2020-11-13 | 中山市伟力宝电机电器有限公司 | Multipurpose pump and water purification and heating system comprising same |
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| KR20100015295A (en) * | 2008-08-04 | 2010-02-12 | 잉 린 카이 | Improved piston valve for diaphragm pump |
| CN201851317U (en) * | 2010-11-11 | 2011-06-01 | 宁波强生电机有限公司 | Diaphragm chamber structure of diaphragm pump |
| CN103573613A (en) * | 2013-10-25 | 2014-02-12 | 厦门科际精密器材有限公司 | Valve block with improved air tightness and air pump |
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| CN206738132U (en) * | 2017-05-09 | 2017-12-12 | 苏耀坤 | A kind of automatic loading water micro pump of water-bag type |
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| US20190136846A1 (en) * | 2017-11-03 | 2019-05-09 | Xiamen Koge Micro Tech Co., Ltd. | Valve head structure for diaphragm pump and diaphragm pump having same |
| CN109751227A (en) * | 2017-11-03 | 2019-05-14 | 厦门科际精密器材有限公司 | It is a kind of for the valve head structure of diaphragm pump and with its diaphragm pump |
| CN211573759U (en) * | 2020-01-03 | 2020-09-25 | 浙江科博电器有限公司 | Anti-backflow sealing assembly and diaphragm pump |
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2020
- 2020-01-03 CN CN202010004354.9A patent/CN111043026A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1714718A (en) * | 2004-07-02 | 2006-01-04 | 蔡应麟 | Water outlet pressure plate |
| KR20100015295A (en) * | 2008-08-04 | 2010-02-12 | 잉 린 카이 | Improved piston valve for diaphragm pump |
| CN201851317U (en) * | 2010-11-11 | 2011-06-01 | 宁波强生电机有限公司 | Diaphragm chamber structure of diaphragm pump |
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| CN204610208U (en) * | 2015-02-03 | 2015-09-02 | 厦门坤锦电子科技有限公司 | A kind of flow controllable rotates diaphragm pump |
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| CN206738132U (en) * | 2017-05-09 | 2017-12-12 | 苏耀坤 | A kind of automatic loading water micro pump of water-bag type |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828291A (en) * | 2020-08-10 | 2020-10-27 | 浙江科博电器有限公司 | Seal assembly with bidirectional non-return function and diaphragm pump |
| CN111927758A (en) * | 2020-09-14 | 2020-11-13 | 中山市伟力宝电机电器有限公司 | Multipurpose pump and water purification and heating system comprising same |
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