CN209414118U - A kind of dual head diaphragm pump - Google Patents
A kind of dual head diaphragm pump Download PDFInfo
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- CN209414118U CN209414118U CN201821935490.4U CN201821935490U CN209414118U CN 209414118 U CN209414118 U CN 209414118U CN 201821935490 U CN201821935490 U CN 201821935490U CN 209414118 U CN209414118 U CN 209414118U
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Abstract
The application provides a kind of dual head diaphragm pump comprising: the motor for double-ended drive with the first output shaft and the second output shaft, first output shaft and the second output shaft are located at the both ends of the motor for double-ended drive；With the first diaphragm pump housing of the first output axis connection of the motor for double-ended drive, and the second diaphragm pump housing with the second output axis connection of the motor for double-ended drive；Wherein, the first diaphragm pump housing is identical as the structure of the second diaphragm pump housing, and is centrosymmetric centered on the motor for double-ended drive.The dual head diaphragm pump of the application has low noise and temperature rise relative to single head diaphragm pump, is able to ascend the usage experience of diaphragm pump；And valve module is set in pressure release portion, the safety in utilization of diaphragm pump can be improved, improve the total quality of diaphragm pump.
Description
Technical field
This application involves diaphragm pump fields, more particularly to dual head diaphragm pump.
Background technique
Diaphragm pump refers to a kind of equipment for trandfer fluid medium, is usually used in needing the device of trandfer fluid medium for example
In water purifier etc..The water purifier of current reverse osmosis mode includes various membrane modules and for providing the diaphragm of pressure for water flow
Pump.
Currently, user's expectation uses the lesser water purifier of overall volume, this defines the volume of diaphragm pump used in turn, from
And define pressure and treating capacity etc. that it is capable of providing.Moreover, diaphragm pump can generate noise and the pump housing during operation
Temperature increases, and excessively high noise will affect the usage experience of user, and excessively high temperature rise will appear safety problem.
This field needs to solve the noise and problem of temperature rise of diaphragm pump, to promote the usage experience and safety of diaphragm pump
Property, improve the overall performance of pump.
Utility model content
The application provides a kind of dual head diaphragm pump, which is characterized in that the dual head diaphragm pump includes:
Motor for double-ended drive with the first output shaft and the second output shaft, first output shaft and the second output shaft difference
Positioned at the both ends of the motor for double-ended drive；
With the first diaphragm pump housing of the first of the motor for double-ended drive the output axis connection, and with the motor for double-ended drive
The second diaphragm pump housing of the second output axis connection；
Wherein, the first diaphragm pump housing is identical as the structure of the second diaphragm pump housing, and with the motor for double-ended drive is
The heart is centrosymmetric.
In one embodiment, the first diaphragm pump housing includes the first pump case, and the first pump case passes through the first connection frame
It connect to form the first pump chambers with the motor for double-ended drive；
It is provided in first pump chambers
First driving assembly, first driving assembly and the first output axis connection；
The first diaphragm seal as diaphragm, first diaphragm seal are connect with first driving assembly；
The first diskware at least one outlet and at least one import, first diskware and first diaphragm seal
Between have gap；
At least one first outlet disk in the outlet of first diskware is set, and the first outlet disk can be opened
With the outlet closed in first diskware；And
At least one first import disk in the import of first diskware is set, and the first import disk can be opened
With the import closed in first diskware；
Wherein when the import of first diskware is in the open state, the first outlet disk closes the institute of the first diskware
There is outlet, and when the outlet of first diskware is in the open state, the first import disk closes all of the first diskware
Import.
In one embodiment, it is provided on first pump case and is communicated at least one inlet fluid of the first diskware
At least one first input port, and at least one is first defeated at least one outlet of first diskware is in fluid communication
Outlet.
In one embodiment, the position that first pump case corresponds to the first import disk of the first diskware is provided with the
One pressure release portion, so that there are gaps between the first import disk and the inner surface of first pump case；
The first valve module is provided in first pressure release portion, first valve module includes the first valve and is arranged
The first spring on the first valve, one end of first valve are resisted against in the newel post of the first import disk, first bullet
One end of spring is resisted against the inner surface of the first pump case.
In one embodiment, it is described at least one outlet include the identical round exit of three sizes, it is described at least
One first outlet disk includes the identical outlet disk of three sizes；
At least one described import includes a round import, and the radius of the circle import is greater than the round exit
Radius；At least one described first import disk includes an import disk；
First valve module includes three groups of valve modules, is separately positioned on three outlet Pan Chu.
In one embodiment, first driving assembly includes:
The first vibrating mass for being connect with first diaphragm seal and it being driven to deform；
For fixing the first eccentric bushing of the first vibrating mass tilt angle；
The first bearing being connect with the first output shaft of the motor for double-ended drive and first vibrating mass, so that described double
Axis stretches motor and drives first vibrating mass to move in rotation.
In one embodiment, first diaphragm seal is connect by the first valve seat with first vibrating mass.
In one embodiment, the second diaphragm pump housing includes the second pump case, and the second pump case passes through the second connection frame
It connect to form the second pump chambers with the motor for double-ended drive；
It is provided in second pump chambers
Second driving assembly, second driving assembly and the second output axis connection；
The second diaphragm seal as diaphragm, second diaphragm seal are connect with second driving assembly；
The second diskware at least one outlet and at least one import, second diskware and second diaphragm seal
Between have gap；
At least one second outlet disk in the outlet of second diskware is set, and the second outlet disk can be opened
With the outlet closed in second diskware；And
At least one second import disk in the import of second diskware is set, and the second import disk can be opened
With the import closed in second diskware；
Wherein when the import of second diskware is in the open state, the second outlet disk closes the institute of the second diskware
There is outlet, and when the outlet of second diskware is in the open state, the second import disk closes all of the second diskware
Import.
In one embodiment, it is provided on second pump case and is communicated at least one inlet fluid of the second diskware
At least one second input port, and at least one is second defeated at least one outlet of second diskware is in fluid communication
Outlet.
In one embodiment, the position that second pump case corresponds to the second import disk of the second diskware is provided with the
Two pressure release portions, so that there are gaps between the second import disk and the inner surface of second pump case；
The second valve module is provided in second pressure release portion, second valve module includes the second valve and is arranged
Second spring on the second valve, one end of second valve are resisted against in the newel post of the second import disk, second bullet
One end of spring is resisted against the inner surface of the second pump case.
In one embodiment, it is described at least one outlet include the identical round exit of three sizes, it is described at least
One second outlet disk includes the identical outlet disk of three sizes；
At least one described import includes a round import, and the radius of the circle import is greater than the round exit
Radius；At least one described second import disk includes an import disk；
Second valve module includes three groups of valve modules, is separately positioned on three outlet Pan Chu.
In one embodiment, second driving assembly includes:
The second vibrating mass for being connect with second diaphragm seal and it being driven to deform；
For fixing the second eccentric bushing of the second vibrating mass tilt angle；
The second bearing being connect with the second output shaft of the motor for double-ended drive and second vibrating mass, so that described double
Axis stretches motor and drives second vibrating mass to move in rotation.
In one embodiment, second diaphragm seal is connect by the second valve seat with second vibrating mass.
The dual head diaphragm pump of the application has low noise and temperature rise relative to single head diaphragm pump, is able to ascend diaphragm pump
Usage experience；And valve module is set in pressure release portion, the safety in utilization of diaphragm pump can be improved, improve the whole matter of diaphragm pump
Amount.
Detailed description of the invention
Fig. 1 is the explosive view of the application dual head diaphragm pump, shows each component of the application dual head diaphragm pump.
Fig. 2 shows the cross-sectional views of the first diaphragm pump housing of the application dual head diaphragm pump.
Fig. 3 shows the enlarged drawing in pressure release portion 31 in the first diaphragm pump housing of the application dual head diaphragm pump in Fig. 2.
Specific embodiment
The application is further described below by drawings and examples.Illustrated by these, the characteristics of the application
It will be become more apparent from advantage clear.
Dedicated word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.Although each of embodiment is shown in the attached drawings
In terms of kind, but unless otherwise indicated, it is not necessary to attached drawing drawn to scale.
In addition, as long as technical characteristic involved in the application different embodiments disclosed below is not constituted each other
Conflict can be combined with each other.
Fig. 1 is the explosive view of the application dual head diaphragm pump, shows each component of the application dual head diaphragm pump.As shown in Figure 1,
Dual head diaphragm pump provided by the present application includes:
Motor for double-ended drive 17 with the first output shaft 171 and the second output shaft 172, first output shaft 171 and
Two output shafts 172 are located at the both ends of the motor for double-ended drive 17；
The first diaphragm pump housing being connect with the first output shaft 171 of the motor for double-ended drive, and it is electric with the Double shaft-extension
The second diaphragm pump housing of the second output shaft 172 connection of machine；
Wherein, the first diaphragm pump housing is identical as the structure of the second diaphragm pump housing, and is with the motor for double-ended drive 17
Center is centrosymmetric.
The first diaphragm pump housing and the second diaphragm pump housing of the application are located at the both ends of motor for double-ended drive 17, the two it is interior
Portion's structure is identical.It sees on the whole, be centrosymmetric distribution both centered on motor for double-ended drive 17, also with motor for double-ended drive
17 symmetrical plane is distributed for the plane of symmetry in mirror symmetry.
Following emphasis describes the internal structure of the first diaphragm pump housing and the connection relationship of itself and motor for double-ended drive 17.Second
It the internal structure of the diaphragm pump housing and is identical with this with the connection relationship of motor for double-ended drive 17.
Fig. 2 shows the cross-sectional views of the first diaphragm pump housing of the application dual head diaphragm pump.Fig. 3 shows the application double end in Fig. 2
The enlarged drawing in pressure release portion 31 in the first diaphragm pump housing of diaphragm pump.
In one embodiment, the first diaphragm pump housing includes the first pump case 3, and the first pump case 3 passes through the first connection
Frame 13 is connect with the motor for double-ended drive 17 forms the first pump chambers；
It is provided in first pump chambers
First driving assembly 210, first driving assembly 210 are connect with first output shaft 171；
The first diaphragm seal 12 as diaphragm, first diaphragm seal 12 are connect with first driving assembly 210；
The first diskware 8 at least one outlet and at least one import, first diskware 8 and first sealing
There is gap between piece 12；
At least one first outlet disk 7 in the outlet of first diskware is set, and the first outlet disk 7 can be beaten
Outlet in open and close first diskware 8；And
At least one first import disk 9 in the import of first diskware is set, and the first import disk 9 can be beaten
Import in open and close first diskware 8；
Wherein when the import of first diskware 8 is in the open state, the first outlet disk 7 closes the first diskware 8
All outlet ports, and when the outlet of first diskware 8 is in the open state, the first import disk 9 closes the first diskware 8
All imports.
In this application, the inner space between the first diaphragm seal 12 and the first pump case 3 is divided into two by the first diskware 8
Part, the part between the first diskware 8 and the first diaphragm seal 12 are known as the first work chamber, the first diskware 8 and the first pump case 3 it
Between part be known as the second work chamber.In pump work, pumping conveyed fluid such as water can only be by going out on the first diskware 8
Mouth and import exchange between the first work chamber and the second work chamber.Meanwhile first diskware 8 can also be fixedly installed in it
On first outlet disk 7 and the first import disk 9.
In this application, the first diaphragm seal 12 and the second diaphragm seal 12 described below effect for serve as diaphragm pump every
Film, its own can be deformed, while the first work chamber and the space size of the second work chamber being caused to change, with this example
As absorbed water and being discharged, while sealing function can also be played, isolation trandfer fluid such as water does not leak outside.
Outlet on first outlet disk 7 and the first diskware 8 corresponds, so that a first outlet disk 7 just can be with
Open and close the one outlet on the first diskware 8.In one embodiment, first diskware 8 is with there are three outlet, from
And the quantity of first outlet disk 7 is also three, these three first outlet disks 7 be just installed on the first diskware 8 these three go out
On mouth, so as to open and close these three outlets on the first diskware 8.In this application, the first import disk 9 and the first disk
Import on part 8 corresponds so that a first import disk 9 can just open and close one on the first diskware 8 into
Mouthful.In one embodiment, first diskware 8 has an import, so that the quantity of the first import disk 9 is also one.
In one embodiment, first diskware 8 includes the identical round exit of three sizes, to include three
The identical first outlet disk 7 of size；First diskware 8 includes a round import, and the radius of the circle import is greater than institute
The radius of round exit is stated, to include a first import disk 9.
In one embodiment, at least one inlet fluid phase with the first diskware 8 is provided on first pump case 3
First input port of at least one logical (not shown), and be in fluid communication extremely at least one outlet of first diskware 8
A few first delivery outlet (not shown).In this way, can be in order to pumping the exchange of interior outer fluid such as water.
The first diskware 8, first outlet disk 7 and the first import disk at least one outlet and at least one import above
9 setting can make the dual head diaphragm pump of the application that can for example be used to aspirate water as follows: when water suction, the first diaphragm seal 12
It is expanded under the action of the first driving assembly to motor for double-ended drive 17, generates suction, import disk 9 opens the first disk because of the suction
Import on part 8 is drawn into the water in the second work chamber in first work chamber through the import on the first diskware 8, together
When outlet disk 7 outlet on the first diskware 8 is also closed because of the suction, prevent water through the outlet on the first diskware 8 from flowing
Out or suck；When water outlet, the two is just on the contrary, the first diaphragm seal 12 is received under the action of the first driving assembly to the first pump case 3
Contracting, generates thrust, and outlet disk 7 opens the outlet on the first diskware 8 because of the thrust, makes the water in the first work chamber through first
Outlet on diskware 8 and flow out to the second work chamber and then be discharged to except pump, while import disk 9 is also closed because of the thrust
Import on first diskware 8, makes water flow out or suck without the import.So on circulate, so that the pump of the application
In continuously working condition, water can be successively conveyed.
In one embodiment, the position that first pump case 3 corresponds to the first import disk 7 of the first diskware is provided with
First pressure release portion 31, so that there are gaps between the first import disk 7 and the inner surface of first pump case 3；Described
The first valve module is provided in one pressure release portion, first valve module includes the first valve 4 and is set on the first valve
First spring 5, one end of first valve 4 are resisted against in the newel post of the first import disk 7, and one end of first spring 5 is supported
Lean against the inner surface of the first pump case 3.In this way when the outlet that pump work pumps is plugged, pressure rise in pump housing, valve 4 exists
Moved under the action of pressure, when pressure is more than the elastic force of spring 5, valve 4 is opened, the fluid such as water in pump be back to pump into
Mouthful place, thus make the pump of the application when being plugged in outlet can operate normally, while also guaranteeing the safety of pump, it is anti-
Accident only occurs.In the embodiment for including three first outlet disks, the first valve module includes three groups of valve modules, is respectively set
In three first outlet Pan Chu.
In this application, first driving assembly 210 includes:
The first vibrating mass 14 for being connect with first diaphragm seal 12 and it being driven to deform；
For fixing the first eccentric bushing 16 of 14 tilt angle of the first vibrating mass；
The first bearing 15 connecting with the first output shaft 171 of the motor for double-ended drive and first vibrating mass 14, makes
The motor for double-ended drive 17 drives first vibrating mass 14 to move in rotation so that the expansion of the first diaphragm seal 12 or
It shrinks.
First driving assembly 210 can make the extension or contraction of the first diaphragm seal 12 of driving of motor for double-ended drive 17, in turn
Enable the dual head diaphragm pump trandfer fluid such as water of the application.
In one embodiment, first diaphragm seal 12 is connected by the first valve seat 11 with first vibrating mass 14
It connects.The valve seat 11 serves as the effect of gasket when connecting the first diaphragm seal 12 and the first vibrating mass 14, while sealing the first sealing
Piece 12.
As described above, the first diaphragm pump housing and the second diaphragm pump housing of the application are located at the two of motor for double-ended drive 17
End, the internal structure of the two are identical.It sees on the whole, be centrosymmetric distribution both centered on motor for double-ended drive 17,
It is symmetrical as the plane of symmetry using the symmetrical plane of motor for double-ended drive 17.Above with respect to the various implementations of first diaphragm pump housing description
Mode is equally applicable to the second diaphragm pump housing.The simple structure and itself and motor for double-ended drive 17 of the second diaphragm pump housing of description below
Connection relationship.
The second diaphragm pump housing includes the second pump case 31, and the second pump case 31 passes through the second connection frame 21 and the motor for double-ended drive
17 connections form the second pump chambers；
It is provided in second pump chambers
Second driving assembly 220, second driving assembly are connect with second output shaft 172；
The second diaphragm seal 22 as diaphragm, second diaphragm seal 22 are connect with second driving assembly 220；
The second diskware 26 at least one outlet and at least one import, second diskware 26 and described second close
There is gap between mounting 22；
At least one second outlet disk 27 in the outlet of second diskware 26 is set, and the second outlet disk 27 can
To open and close the outlet in second diskware 26；And
At least one second import disk 25 in the import of second diskware 26 is set, and the second import disk 25 can
To open and close the import in second diskware 26；
Wherein when the import of second diskware 26 is in the open state, the second outlet disk 27 closes the second diskware
26 all outlet ports, and when the outlet of second diskware 26 is in the open state, the second import disk 25 closes second
All imports of diskware 26.
In one embodiment, second diskware 26 includes equally the identical round exit of three sizes, to wrap
Include the identical second outlet disk 27 of three sizes；Second diskware 26 equally includes a round import, the circle import
Radius be greater than the round exit radius, thus include a second import disk 25.
The second diaphragm pump housing equally also includes valve module as described above for ensuring to pump when being plugged in outlet
It can operate normally, while also guarantee the safety of pump, try to avert accidents.I will not elaborate.Similarly, second pump
At least one the second input port (not shown) communicated at least one inlet fluid of the second diskware 26 is provided on shell 31, with
And at least one second delivery outlet (not shown) at least one outlet fluid communication of second diskware 26.
In this application, second driving assembly 220 includes:
The second vibrating mass 20 for being connect with second diaphragm seal 22 and it being driven to deform；
For fixing the second eccentric bushing 18 of 20 tilt angle of the second vibrating mass；
The second bearing 19 connecting with the second output shaft 172 of the motor for double-ended drive and second vibrating mass 20, makes
The motor for double-ended drive 17 drives second vibrating mass 20 to move in rotation so that the expansion of the second diaphragm seal 22 or
It shrinks.
In one embodiment, second diaphragm seal 22 is connected by the second valve seat 23 with second vibrating mass 20
It connects.
In this application, the connection of some components can be attached using connection type known in the art, such as can
To be attached by screw 1,2,10,24,32,33.This connection type is that this field is very common, and the application is no longer detailed
It states.
In this application, the operation of the first diaphragm pump housing and the second diaphragm pump housing is synchronous.That is, when the first diaphragm pump
When body for example absorbs water, the second diaphragm pump housing is also at water suction working condition；And when the first diaphragm pump housing is for example discharged, second every
Membrane pump body is also at water outlet working condition.The dual head diaphragm pump of the application has low noise and temperature relative to single head diaphragm pump
It rises, is able to ascend the usage experience of diaphragm pump；And valve module is set in pressure release portion, the safety in utilization of diaphragm pump can be improved, it mentions
The high total quality of diaphragm pump.The dual head diaphragm pump of the application can be widely applied to water purifier, can be and realizes water purifier
Miniaturization Design.
In the description of the present application, it should be noted that term " on ", "lower", "inner", "outside", "front", "rear", " left side ",
The orientation or positional relationship of instructions such as " right sides " is to be merely for convenience of based on the orientation or positional relationship under the application working condition
It describes the application and simplifies description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore should not be understood as the limitation to the application.
In the description of the present application, it should be noted that unless otherwise clearly defined and limited, term " installation " " phase
Even " " connection " should broadly understood.For the ordinary skill in the art, it can understand that above-mentioned term exists with concrete condition
Concrete meaning in the application.
It combines preferred embodiment above the application is illustrated, but these embodiments are only exemplary
, only play the role of illustrative.On this basis, a variety of replacements and improvement can be carried out to the application, these each fall within this
In the protection scope of application.
Claims (7)
1. a kind of dual head diaphragm pump, which is characterized in that the dual head diaphragm pump includes:
Motor for double-ended drive with the first output shaft and the second output shaft, first output shaft and the second output shaft are located at
The both ends of the motor for double-ended drive；
With the first diaphragm pump housing of the first output axis connection of the motor for double-ended drive, and second with the motor for double-ended drive
Export the second diaphragm pump housing of axis connection；
Wherein, the first diaphragm pump housing is identical as the structure of the second diaphragm pump housing, and is in centered on the motor for double-ended drive
Central symmetry.
2. dual head diaphragm pump according to claim 1, which is characterized in that the first diaphragm pump housing includes the first pump case,
First pump case connect to form the first pump chambers by the first connection frame with the motor for double-ended drive；
It is provided in first pump chambers
First driving assembly, first driving assembly and the first output axis connection；
The first diaphragm seal as diaphragm, first diaphragm seal are connect with first driving assembly；
The first diskware at least one outlet and at least one import, between first diskware and first diaphragm seal
With gap；
At least one first outlet disk in the outlet of first diskware is set, and the first outlet disk can beat on and off
Close the outlet in first diskware；And
At least one first import disk in the import of first diskware is set, and the first import disk can beat on and off
Close the import in first diskware；
Wherein when the import of first diskware is in the open state, the first outlet disk close the first diskware it is all go out
Mouthful；And when the outlet of first diskware is in the open state, the first import disk closes all imports of the first diskware.
3. dual head diaphragm pump according to claim 2, which is characterized in that be provided on first pump case and the first diskware
At least one first input port for communicating of at least one inlet fluid, and at least one outlet stream with first diskware
At least one first delivery outlet that body communicates.
4. dual head diaphragm pump according to claim 2, which is characterized in that first pump case corresponds to the of the first diskware
The position of one import disk is provided with the first pressure release portion, so that depositing between the first import disk and the inner surface of first pump case
In gap；
It is provided with the first valve module in first pressure release portion, first valve module includes the first valve and is set in the
The first spring on one valve, one end of first valve are resisted against in the newel post of the first import disk, first spring
One end is resisted against the inner surface of the first pump case.
5. dual head diaphragm pump according to claim 4, which is characterized in that at least one described outlet includes three size phases
Same round exit, at least one described first outlet disk include the identical outlet disk of three sizes；
At least one described import includes a round import, and the radius of the circle import is greater than the half of the round exit
Diameter；At least one described first import disk includes an import disk；
First valve module includes three groups of valve modules, is separately positioned on three outlet Pan Chu.
6. according to the described in any item dual head diaphragm pumps of claim 2-4, which is characterized in that first driving assembly includes:
The first vibrating mass for being connect with first diaphragm seal and it being driven to deform；
For fixing the first eccentric bushing of the first vibrating mass tilt angle；
The first bearing being connect with the first output shaft of the motor for double-ended drive and first vibrating mass, so that the Double shaft-extension
Motor drives first vibrating mass to move in rotation.
7. dual head diaphragm pump according to claim 6, which is characterized in that first diaphragm seal passes through the first valve seat and institute
State the connection of the first vibrating mass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821935490.4U CN209414118U (en) | 2018-11-21 | 2018-11-21 | A kind of dual head diaphragm pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821935490.4U CN209414118U (en) | 2018-11-21 | 2018-11-21 | A kind of dual head diaphragm pump |
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| Publication Number | Publication Date |
|---|---|
| CN209414118U true CN209414118U (en) | 2019-09-20 |
Family
ID=67934874
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821935490.4U Active CN209414118U (en) | 2018-11-21 | 2018-11-21 | A kind of dual head diaphragm pump |
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| CN (1) | CN209414118U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020114401A1 (en) * | 2018-12-03 | 2020-06-11 | 广东美的白色家电技术创新中心有限公司 | Booster pump and water purification device |
-
2018
- 2018-11-21 CN CN201821935490.4U patent/CN209414118U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020114401A1 (en) * | 2018-12-03 | 2020-06-11 | 广东美的白色家电技术创新中心有限公司 | Booster pump and water purification device |
| US11905942B2 (en) | 2018-12-03 | 2024-02-20 | Guangdong Midea White Home Appliance Technology Innovation Center Co., Ltd. | Booster pump and water purification device |
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