CN215027697U - Primary and secondary reverse osmosis membrane device and reverse osmosis water purifier - Google Patents
Primary and secondary reverse osmosis membrane device and reverse osmosis water purifier Download PDFInfo
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- CN215027697U CN215027697U CN202121142829.7U CN202121142829U CN215027697U CN 215027697 U CN215027697 U CN 215027697U CN 202121142829 U CN202121142829 U CN 202121142829U CN 215027697 U CN215027697 U CN 215027697U
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Abstract
The utility model discloses a primary and secondary reverse osmosis membrane device and reverse osmosis water purifier, this primary and secondary reverse osmosis membrane device include the casing and set up mother's membrane module and the sub-membrane module in the casing, and the sub-membrane module is located to mother's membrane module cover, and the inside route that the pure water mouth of sub-membrane module passes through the casing communicates in the former water cavity of mother's membrane module. This primary and secondary reverse osmosis membrane device has sub-membrane module and the mother membrane module of nested setting, after mother membrane module stop work, can utilize the pure water of the production of sub-membrane module to wash mother membrane module to remaining raw water and waste water in the mother membrane module of discharging, avoided the ion of reverse osmosis water purifier in raw water and the waste water in the mother membrane module permeate the pure water after shutting down, solved the higher problem of straight drink reverse osmosis water purifier initial pure water TDS value, user experience is better. The primary and secondary membrane assemblies in the nested arrangement are communicated through the internal passage in the shell, so that the arrangement of external pipelines is reduced, and the size of the reverse osmosis water purifier is convenient to miniaturize.
Description
Technical Field
The utility model relates to a primary and secondary reverse osmosis membrane device and reverse osmosis water purifier.
Background
Because the domestic water purifier can provide healthy drinking water for the user in real time, is more and more liked by the user, and has walked into thousands of households. The existing water purifier mainly filters tap water by means of a reverse osmosis membrane, and water in the tap water is separated from impurities such as inorganic salts, heavy metal ions, organic matters, colloids and the like by the water purifying equipment under the pressure of the reverse osmosis membrane. However, in the process of the water purifier standby or shutdown, tap water (raw water), waste water and pure water exist in the filter element at the same time, wherein the raw water and the waste water are both in front of the membrane of the reverse osmosis membrane filter element, and the pure water is behind the membrane of the reverse osmosis membrane filter element, and the Total Dissolved Solids (TDS) value in the tap water and the waste water is far higher than the TDS value of the pure water, therefore, when the water purifier is in the standby state for a long time, ions in the tap water and the waste water can be gradually diffused into the pure water, so that the TDS value of the pure water is increased, and when the water purifier is started next time, the TDS value of the effluent at the front section of the water is higher, which affects the health of users.
In order to solve the above problems, when the water purifier is in standby, a pressure container for storing pure water or another separate reverse osmosis membrane filter element is generally adopted to flush the reverse osmosis membrane filter element so as to reduce the TDS value. The water purifier is large in size and complex in structure due to the fact that a pressure container for storing pure water or an independent reverse osmosis membrane filter element needs to be arranged, and the water purifier is not convenient to miniaturize.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a primary and secondary reverse osmosis membrane device and reverse osmosis water purifier in order to overcome the defect that reverse osmosis water purifier among the prior art is bulky, the structure is complicated.
The utility model discloses an above-mentioned technical problem is solved through following technical scheme:
a primary and secondary reverse osmosis membrane device comprises a shell, and a primary membrane assembly and a secondary membrane assembly which are arranged in the shell, wherein the primary membrane assembly is sleeved on the secondary membrane assembly, and a pure water port of the secondary membrane assembly is communicated with a raw water cavity of the primary membrane assembly through an internal passage of the shell.
In this scheme, this primary and secondary reverse osmosis membrane device has sub-membrane module and the female membrane module of nested setting, after female membrane module stop work, the pure water that can utilize the production of sub-membrane module washs female membrane module, with remaining raw water and waste water in the female membrane module of discharge, the ion of having avoided the reverse osmosis water purifier in raw water and waste water in the female membrane module of shut down permeates the pure water, when using the water purifier next time, can directly get clean pure water, the higher problem of straight drink reverse osmosis water purifier initial pure water TDS value has been solved, user experience is better. Meanwhile, the primary and secondary membrane assemblies which are nested are communicated through an internal passage in the shell, so that the arrangement of external pipelines is reduced, the integration level is higher, and the size of the reverse osmosis water purifier is convenient to miniaturize.
Preferably, the mother membrane module includes a mother reverse osmosis membrane wound around the outer circumferential surface of the sub-membrane module in the circumferential direction of the sub-membrane module to form a multi-layer structure, the water outlet of the internal passage is provided at one end of the multi-layer structure, and the mother membrane module further has a mother waste water outlet provided at the other end of the multi-layer structure.
In this scheme, the pure water that the sub-membrane module produced flows in from multilayer structure's tip, washes the adnexed filth on each layer surface of female reverse osmosis membrane to discharge from multilayer structure's the other end, it is effectual to wash, avoids the existence to wash the dead angle.
Preferably, the sub-membrane module comprises a protective shell, and a sub-reverse osmosis membrane and a central tube which are arranged in the protective shell, the sub-reverse osmosis membrane is wound on the central tube, a via hole is arranged on the peripheral surface of the central tube, and one end of the central tube is communicated with the pure water port of the sub-membrane module.
In the scheme, raw water and pure water are respectively arranged on two sides of the sub-reverse osmosis membrane, the raw water is positioned on the outer side of the sub-reverse osmosis membrane, part of water in the raw water penetrates through the sub-reverse osmosis membrane to reach the inner side and become the pure water, and the pure water flows into the central tube through the through hole in the central tube and is drained to the pure water port through the central tube.
Preferably, the outer wall of one end of the protective shell extends along the axial direction of the sub-membrane module and forms a pure water cavity with the bottom surface of the protective shell and the shell in an enclosing manner, a drainage flow channel and a water collection tank are arranged on the outer peripheral surface of the protective shell, the water collection tank is arranged around the protective shell and is located below the drainage flow channel, the drainage flow channel extends to the water collection tank along the axial direction of the protective shell, a water collection hole communicated to the pure water cavity is formed in the water collection tank, a mother pure water port is formed in the shell, and the mother pure water port is communicated with the pure water cavity.
In this scheme, the pure water chamber is located the below of sub-membrane module, is convenient for utilize the space of sub-membrane module below, makes the water route of sub-membrane module and female membrane module stagger, improves the space utilization in the casing. The water drainage channel and the water collection tank are convenient for collecting pure water and draining the pure water to the pure water cavity.
Preferably, the primary and secondary reverse osmosis membrane device further comprises a sleeve assembly, the sleeve assembly is disposed inside the pure water cavity, two ends of the sleeve assembly are respectively connected to the sub-membrane assembly and the inner wall of the housing, the sleeve assembly comprises an inner tube and an outer tube sleeved on the inner tube, the inner tube is used for extending the waste water port of the sub-membrane assembly to the outer wall surface of the housing, and a cavity between the inner tube and the outer tube is used for extending the water inlet of the sub-membrane assembly to the outer wall surface of the housing.
In this scheme, adopt above-mentioned structural style, be convenient for optimize the water route of arranging sub-membrane module and mother's membrane module, improve the space utilization in the casing.
Preferably, the sub-membrane module further comprises a check valve, the check valve is arranged on the internal passage, and an inlet of the check valve faces the sub-membrane module.
In the scheme, pure water generated by the sub-membrane module can flow to the raw water cavity of the main membrane module through the check valve, and water in the raw water cavity is prevented from entering the interior of the sub-membrane module by the check valve.
Preferably, the waste water port of the sub-membrane module and the pure water port of the sub-membrane module are respectively arranged at two ends of the sub-membrane module.
In this scheme, adopt above-mentioned structural style, make water flow to the other end from sub reverse osmosis membrane's one end, make full use of reverse osmosis membrane improves the filter effect.
Preferably, the mother membrane assembly further comprises a mother flow limiting mechanism, the mother flow limiting mechanism is mounted on a water outlet passage of a mother waste water inlet of the mother membrane assembly, and the mother flow limiting mechanism is used for limiting the water outlet flow of the mother waste water inlet of the mother membrane assembly;
the sub-membrane assembly further comprises a sub-flow limiting mechanism, the sub-flow limiting mechanism is installed on a water outlet passage of the waste water outlet of the sub-membrane assembly, and the sub-flow limiting mechanism is used for limiting the water outlet flow of the waste water outlet of the sub-membrane assembly.
In the scheme, by adopting the structural form, the flow of the mother waste water port of the mother membrane assembly is limited by the mother flow limiting mechanism, so that the raw water cavity of the mother membrane assembly keeps a certain pressure, and water is conveniently produced; the sub-flow limiting mechanism limits the flow of a waste water port of the sub-membrane module, so that a raw water cavity of the sub-membrane module keeps a certain pressure, and water is conveniently produced.
Preferably, the primary and secondary reverse osmosis membrane device further comprises a primary raw water pipeline and a primary electromagnetic valve, the primary raw water pipeline is communicated with the primary water inlet of the primary membrane assembly, and the primary electromagnetic valve is installed on the primary raw water pipeline;
the primary and secondary reverse osmosis membrane device further comprises a primary water pipeline and a secondary electromagnetic valve, the primary water pipeline is communicated with the water inlet of the secondary membrane component, and the secondary electromagnetic valve is installed on the primary water pipeline.
In this scheme, when the user opened the valve and got the pure water, female solenoid valve opened, began to make water. When a user finishes taking water and closes the valve, the female electromagnetic valve is closed, the sub electromagnetic valve is opened, the sub membrane assembly starts to produce water, pure water generated by the sub membrane assembly washes a female reverse osmosis membrane in the female membrane assembly, and waste water and raw water in a raw water cavity of the female membrane assembly are discharged so as to reduce a TDS value during low-time water production. When the sub-membrane module operates for a period of time, the sub-electromagnetic valve is closed, and the machine stops operating.
Preferably, the primary and secondary reverse osmosis membrane device further comprises a first check valve, a second check valve and a third check valve, the first check valve is installed on the water outlet passage of the primary waste water port of the primary membrane module, the inlet of the first check valve faces the primary membrane module, the second check valve is installed on the water outlet passage of the waste water port of the secondary membrane module, the inlet of the second check valve faces the secondary membrane module, the third check valve is installed on the water outlet passage of the primary pure water port of the primary membrane module, and the inlet of the third check valve faces the primary membrane module.
Preferably, the primary and secondary reverse osmosis membrane device further comprises a two-position three-way valve, the two-position three-way valve is arranged on a passage between the raw water and the primary water inlet of the primary membrane module, the two-position three-way valve is further arranged on a passage between the raw water and the water inlet of the secondary membrane module, and the raw water can be switched and communicated between the primary water inlet of the primary membrane module and the water inlet of the secondary membrane module through the two-position three-way valve.
A reverse osmosis water purifier comprises the primary and secondary reverse osmosis membrane devices.
In the scheme, the primary and secondary reverse osmosis membrane device is high in integration level, and can be applied to a reverse osmosis water purifier, so that the volume of the whole machine can be reduced, the production and manufacturing cost can be reduced, and the backwashing time and water quantity of the whole machine system after use can be reduced.
On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.
The utility model discloses an actively advance the effect and lie in: this primary and secondary reverse osmosis membrane device has sub-membrane module and the mother membrane module of nested setting, after mother membrane module stop work, the pure water that can utilize sub-membrane module to produce washs mother membrane module, with remaining raw water and waste water in the mother membrane module of discharging, the ion of having avoided the water purifier in raw water and waste water in the mother membrane module after shutting down permeates the pure water, when using the water purifier next time, can directly get clean pure water, the higher problem of straight drink reverse osmosis water purifier initial pure water TDS value has been solved, user experience is better. Meanwhile, the nested primary and secondary membrane assemblies are communicated through an internal passage in the shell, so that the structure and the external pipeline arrangement are simplified, the backwashing time and the water quantity of the whole system after use are reduced, a pressure container for storing pure water or an independent reverse osmosis membrane filter element is not required to be arranged to wash the primary membrane assembly, the integration level is high, and the water purifier is convenient to miniaturize.
The primary and secondary reverse osmosis membrane device is high in integration level, can be applied to a reverse osmosis water purifier, can reduce the volume of the water purifier, reduces the production and manufacturing cost, and reduces the backwashing time and water quantity of the water purifier system after use.
Drawings
Fig. 1 is a schematic structural view of a primary-secondary reverse osmosis membrane device according to the preferred embodiment of the present invention.
Fig. 2 is a sectional view of the primary and secondary reverse osmosis membrane apparatus and a schematic water path diagram of a reverse osmosis water purifier according to preferred embodiment of the present invention.
Fig. 3 is an exploded view of the primary and secondary reverse osmosis membrane devices according to the preferred embodiment of the present invention.
Fig. 4 is a schematic diagram of a cross-sectional view of the primary and secondary reverse osmosis membrane devices and a water path of a reverse osmosis water purifier according to the preferred embodiment of the present invention.
Fig. 5 is an exploded view of the primary and secondary reverse osmosis membrane devices according to the preferred embodiment of the present invention 2.
Description of reference numerals:
Mother reverse osmosis membrane 21
Female water inlet 201
Female pure water port 203
End cap 302
Sub reverse osmosis membrane 32
Via 331
Check valve 34
Mother waste water pipe 5
Female current limiting mechanism 51
Sub waste water pipeline 6
Mother raw water pipeline 7
Waste water main 100
Raw water main pipe 200
Two-position three-way valve 904
Water inlet electromagnetic valve 905
Waste water solenoid valve 906
Mounting cover 907
Detailed Description
The invention will be more clearly and completely described below by way of two embodiments and with reference to the accompanying drawings, which, however, do not limit the scope of the invention to the embodiments described.
Example 1
As shown in fig. 1 to 3, the present embodiment discloses a primary and secondary reverse osmosis membrane apparatus including a housing 1, and a primary membrane module 2 and a secondary membrane module 3 disposed in the housing 1. The mother membrane module 2 is sleeved outside the sub-membrane module 3, and the pure water port 301 of the sub-membrane module 3 is communicated with the raw water cavity 22 of the mother membrane module 2 through an internal passage of the shell 1. The water flow direction 400 in the primary and secondary reverse osmosis membrane devices is indicated by the arrows in fig. 2.
In this embodiment, after mother membrane module 2 stop work, the pure water that can utilize the production of sub-membrane module 3 washs mother membrane module 2 to remaining raw water and waste water in the mother membrane module 2 of discharging have avoided the reverse osmosis water purifier to permeate the pure water in the raw water of shutting down back mother membrane module 2 and the ion in the waste water, when next use the water purifier, can directly get clean pure water, have reduced the TDS value of pure water, and user experience is better. Meanwhile, the sub-membrane module 3 and the main membrane module 2 which are arranged in a nested manner are communicated through an internal passage in the shell 1, so that the structure and the external pipeline arrangement are simplified, the back washing time and the water quantity of the whole system after use are correspondingly reduced, a pressure container for storing pure water or an independent reverse osmosis membrane filter element is not required to be arranged to wash the main membrane module 2, the integration level is high, and the reverse osmosis water purifier is convenient to miniaturize.
The mother membrane module 2 includes a mother reverse osmosis membrane 21, the mother reverse osmosis membrane 21 is wound around the outer peripheral surface of the sub-membrane module 3 in the circumferential direction of the sub-membrane module 3 to form a multi-layer structure, a water outlet of the internal passage is provided at one end of the multi-layer structure, the mother membrane module 2 further includes a mother waste water port 202, and the mother waste water port 202 is provided at the other end of the multi-layer structure. The pure water generated by the sub-membrane module 3 flows in from the end part of the multilayer structure, washes away the dirt attached to the surface of each layer of the mother reverse osmosis membrane 21 and is discharged from the other end of the multilayer structure, the washing effect is good, and the washing dead angle is avoided. The parent reverse osmosis membrane 21 is mounted inside the casing 1 by a mounting cover 907.
The sub-membrane module 3 comprises a protective shell 31, a sub-reverse osmosis membrane 32 arranged in the protective shell 31 and a central pipe 33. The sub reverse osmosis membrane 32 is wound around the central tube 33, a through hole 331 is provided on the outer circumferential surface of the central tube 33, and one end of the central tube 33 is communicated with the pure water port 301 of the sub-membrane module 3. Preferably, the number of the through holes 331 is plural, and the plural through holes 331 are provided at intervals in the axial direction of the center pipe 33, so that the pure water can be collected from different height positions. In this embodiment, raw water and pure water are respectively disposed on both sides of the sub-reverse osmosis membrane 32, the raw water is located on the outer side of the sub-reverse osmosis membrane 32, a part of the raw water passes through the sub-reverse osmosis membrane 32 to reach the inner side and become pure water, and the pure water flows into the central tube 33 through the through hole 331 on the central tube 33 and is guided to the pure water port through the central tube 33.
The outer wall of one end of the protective shell 31 extends along the axial direction of the sub-membrane module 3 and forms a pure water cavity 23 with the bottom surface of the protective shell 31 and the shell 1 in an enclosing mode, the pure water cavity 23 is located below the sub-membrane module 3, the space below the sub-membrane module 3 is convenient to use, the water channels of the sub-membrane module and the water channels of the main membrane module 2 are arranged in a staggered mode, and the space utilization rate in the shell 1 is improved. A water collecting tank 311 and a drainage flow channel (not shown in the figure) are arranged on the outer peripheral surface of the protective shell 31, the water collecting tank 311 is arranged around the protective shell 31 and is positioned below the drainage flow channel, the drainage flow channel extends into the water collecting tank 311 along the axial direction of the protective shell 31, a water accumulating hole 312 communicated to the pure water cavity 23 is arranged in the water collecting tank 311, a female pure water port 203 is arranged on the shell 1, and the female pure water port 203 is communicated with the pure water cavity 23. The protective shell 31 includes side shells 301 and end caps 302, and the end caps 302 are detachably connected to the side shells 301 to facilitate installation and maintenance of the sub reverse osmosis membranes 32.
The primary and secondary reverse osmosis membrane device further comprises a sleeve assembly 4, the sleeve assembly 4 is arranged inside the pure water cavity 23, and two ends of the sleeve assembly 4 are connected to the inner walls of the sub-membrane assembly 3 and the shell 1 respectively. In this embodiment, the upper end of the sleeve assembly 4 is fixed to the bottom surface of the casing 31, and the lower end of the sleeve assembly 4 is detachably connected to the housing 1, so as to facilitate installation and maintenance of the sub-membrane assembly 3. The sleeve assembly 4 comprises an inner pipe 41 and an outer pipe 42 sleeved on the inner pipe 41, the inner pipe 41 is used for extending a waste water outlet 303 of the sub-membrane assembly to the outer wall surface of the shell 1, and a cavity between the inner pipe 41 and the outer pipe 42 is used for extending a water inlet 302 of the sub-membrane assembly to the outer wall surface of the shell 1, so that water paths of the sub-membrane assembly 3 and the main membrane assembly 2 are optimized, and the space utilization rate in the shell 1 is improved.
The sub-membrane module 3 further comprises a check valve 34, the check valve 34 is arranged on the inner passage, and an inlet of the check valve 34 faces the sub-membrane module 3. Pure water generated by the sub-membrane module 3 can flow to the raw water chamber 22 of the main membrane module 2 through the check valve 34, and water in the raw water chamber 22 can be prevented from entering the interior of the sub-membrane module 3 by the check valve 34.
The waste water port 303 of the sub-membrane module and the pure water port 301 of the sub-membrane module are respectively arranged at two ends of the sub-membrane module 3, so that water flows from one end of the sub-reverse osmosis membrane 32 to the other end, the sub-reverse osmosis membrane 32 is fully utilized, and the filtering effect is improved.
The primary-secondary reverse osmosis membrane device further comprises a primary flow limiting mechanism 51 and a primary waste water pipeline 5, the primary waste water pipeline 5 is communicated with a primary waste water port 202 of the primary membrane assembly 2, the primary flow limiting mechanism 51 is installed on the primary waste water pipeline 5, the primary flow limiting mechanism 51 limits the flow of the primary waste water port 202 of the primary membrane assembly 2, the primary water cavity 22 of the primary membrane assembly 2 keeps certain pressure, and water making is facilitated. The primary and secondary reverse osmosis membrane device further comprises a secondary flow limiting mechanism 61 and a secondary waste water pipeline 6, the secondary waste water pipeline 6 is communicated with the waste water port 303 of the secondary membrane assembly, the secondary flow limiting mechanism 61 is installed on the secondary waste water pipeline 6, and the secondary flow limiting mechanism 61 limits the flow of the waste water port 303 of the secondary membrane assembly, so that a raw water cavity of the secondary membrane assembly 3 keeps certain pressure, and water production is facilitated.
The primary and secondary reverse osmosis membrane device further comprises a primary water pipeline 7 and a primary electromagnetic valve 71, wherein the primary water pipeline 7 is communicated with a primary water inlet 201 of the primary membrane assembly 2, and the primary electromagnetic valve 71 is installed on the primary water pipeline 7. The primary and secondary reverse osmosis membrane device further comprises a primary water pipeline 8 and a secondary electromagnetic valve 81, wherein the primary water pipeline 8 is communicated with the water inlet 302 of the sub-membrane component, and the secondary electromagnetic valve 81 is installed on the primary water pipeline 8.
When the user opens the valve to take pure water, the female electromagnetic valve 71 is opened to start water production. When a user finishes taking water and closes the valve, the main electromagnetic valve 71 is closed, the sub electromagnetic valve 81 is opened, the sub-membrane module 3 starts to produce water, pure water generated by the sub-membrane module 3 washes the main reverse osmosis membrane 21 in the main membrane module 2, and waste water and raw water in the raw water cavity 22 of the main membrane module 2 are discharged, so that the TDS value in low-time water production is reduced. When the sub-membrane module 3 operates for a period of time, the sub-solenoid valve 81 is closed and the machine stops operating.
The primary and secondary reverse osmosis membrane device further comprises a waste water main pipe 100, a raw water main pipe 200 and a pure water pipe 300, wherein the primary raw water pipeline 7 and the secondary raw water pipeline 8 are communicated with the raw water main pipe 200, the primary waste water pipeline 5 and the secondary waste water pipeline 6 are communicated with the waste water main pipe 100, and the pure water pipe 300 is communicated with a primary pure water port 203.
The embodiment also discloses a reverse osmosis water purifier, which comprises the primary and secondary reverse osmosis membrane devices. The primary and secondary reverse osmosis membrane device is high in integration level, and when the device is applied to a reverse osmosis water purifier, the volume of the whole device can be reduced, the production and manufacturing cost can be reduced, and the backwashing time and water quantity of the whole device system after use can be reduced.
Example 2
As shown in fig. 4 and 5, the present embodiment has substantially the same structure as embodiment 1, except that:
the main electromagnetic valve and the sub electromagnetic valve in the embodiment 1 are replaced by a two-position three-way valve 904, and meanwhile, a one-way valve is additionally arranged on each water outlet waterway of the main reverse osmosis membrane device and the sub reverse osmosis membrane device. The two-position three-way valve 904 is arranged on a passage between raw water and the mother water inlet 201 of the mother membrane module 2, the two-position three-way valve 904 is also arranged on a passage between the raw water and the water inlet 302 of the sub-membrane module, and two-way water control is realized through the two-position three-way valve 904, so that the structure is simplified, and the integration level is improved. The raw water can be switched and communicated between the mother water inlet 201 of the mother membrane module 2 and the water inlet 302 of the subsidiary membrane module through a two-position three-way valve 904. When the mother membrane module 2 works, the two-position three-way valve 904 communicates raw water with the mother water inlet 201 of the mother membrane module 2, and simultaneously closes the water inlet 302 of the subsidiary membrane modules. When the mother membrane module 2 stops working and the subsidiary membrane modules 3 start working, the two-position three-way valve 904 communicates the raw water with the water inlets 302 of the subsidiary membrane modules and simultaneously closes the mother water inlet 201 of the mother membrane module 2. When the sub-membrane module 3 operates for a period of time, the raw water is shut off and the operation of the machine is stopped.
In this embodiment, the two-position three-way valve 904 is a solenoid valve in the prior art, and may be a manual valve body of another two-position three-way valve.
The primary and secondary reverse osmosis membrane device further comprises a first one-way valve 901, a second one-way valve 902 and a third one-way valve 903. The first check valve 901 is installed on the water outlet passage of the mother wastewater port 202 of the mother membrane module 2, and the inlet of the first check valve 901 faces the mother membrane module 2, so that water in the wastewater pipeline is prevented from flowing back into the mother membrane module 2. The second check valve 902 is installed on the water outlet passage of the wastewater outlet 303 of the sub-membrane module, and the inlet of the second check valve 902 faces the sub-membrane module 3, so as to prevent water in the wastewater passage from flowing back into the sub-membrane module 3. The third check valve 903 is installed on the water outlet passage of the mother pure water port 203 of the mother membrane module 2, and the inlet of the third check valve 903 faces the mother membrane module 2, so that water in the pure water pipeline is prevented from flowing into the mother membrane module 2 in a reverse flow manner.
A water inlet electromagnetic valve 905 is also arranged on the raw water pipeline and used for controlling the on-off of the raw water.
A waste water solenoid valve 906 is also installed on the waste water pipeline. When washing female reverse osmosis membrane, waste water solenoid valve 906 opens completely, washes with big water yield, improves and washes the effect. When the mother membrane module 2 is used for producing water, the opening degree of the wastewater electromagnetic valve 906 is properly reduced, so that the raw water cavity of the mother membrane module 2 keeps certain pressure, and water production is facilitated.
Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (10)
1. The primary and secondary reverse osmosis membrane device is characterized by comprising a shell, and a primary membrane assembly and a secondary membrane assembly which are arranged in the shell, wherein the primary membrane assembly is sleeved on the secondary membrane assembly, and a pure water port of the secondary membrane assembly is communicated with a raw water cavity of the primary membrane assembly through an internal passage of the shell.
2. The primary and secondary reverse osmosis membrane apparatus according to claim 1, wherein the primary membrane module comprises a primary reverse osmosis membrane wound around the outer circumferential surfaces of the secondary membrane modules in the circumferential direction of the secondary membrane modules to form a multi-layered structure, the outlet of the internal passage is provided at one end of the multi-layered structure, and the primary membrane module further has a primary waste water port provided at the other end of the multi-layered structure.
3. The primary and secondary reverse osmosis membrane device according to claim 1, wherein the sub-membrane module comprises a protective shell, and a sub-reverse osmosis membrane and a central tube which are arranged in the protective shell, the sub-reverse osmosis membrane is wound on the central tube, a through hole is arranged on the outer circumferential surface of the central tube, and one end of the central tube is communicated with the pure water port of the sub-membrane module.
4. The primary-secondary reverse osmosis membrane device according to claim 3, wherein the outer wall of one end of the protective shell extends along the axial direction of the sub-membrane assembly and forms a pure water cavity with the bottom surface of the protective shell and the shell body, a water drainage channel and a water collection tank are arranged on the outer circumferential surface of the protective shell, the water collection tank is arranged around the protective shell and is located below the water drainage channel, the water drainage channel extends to the water collection tank along the axial direction of the protective shell, a water accumulation hole communicated with the pure water cavity is arranged in the water collection tank, and a primary pure water port is arranged on the shell body and is communicated with the pure water cavity.
5. The primary and secondary reverse osmosis membrane device according to claim 4, further comprising a sleeve assembly, wherein the sleeve assembly is disposed inside the pure water chamber, two ends of the sleeve assembly are respectively connected to the sub-membrane assembly and the inner wall of the housing, the sleeve assembly comprises an inner tube and an outer tube sleeved on the inner tube, the inner tube is used for extending the waste water outlet of the sub-membrane assembly to the outer wall of the housing, and a cavity between the inner tube and the outer tube is used for extending the water inlet of the sub-membrane assembly to the outer wall of the housing.
6. The primary and secondary reverse osmosis membrane device of claim 1, wherein the sub-membrane module further comprises a check valve, the internal passage is provided with the check valve, and an inlet of the check valve faces the sub-membrane module.
7. The primary-secondary reverse osmosis membrane device according to claim 1, wherein the primary membrane module further comprises a primary flow restriction mechanism mounted on the outlet passage of the primary waste water port of the primary membrane module, the primary flow restriction mechanism being configured to restrict the outlet flow of the primary waste water port of the primary membrane module;
the sub-membrane assembly further comprises a sub-flow limiting mechanism, the sub-flow limiting mechanism is installed on a water outlet passage of the waste water outlet of the sub-membrane assembly, and the sub-flow limiting mechanism is used for limiting the water outlet flow of the waste water outlet of the sub-membrane assembly.
8. The child-mother reverse osmosis membrane device according to claim 1, further comprising a first check valve installed on the outlet passage of the mother waste port of the mother membrane module, an inlet of the first check valve facing the mother membrane module, a second check valve installed on the outlet passage of the waste port of the child membrane module, an inlet of the second check valve facing the child membrane module, and a third check valve installed on the outlet passage of the mother pure port of the mother membrane module, an inlet of the third check valve facing the mother membrane module.
9. The primary and secondary reverse osmosis membrane device according to any one of claims 1-8, further comprising a two-position three-way valve disposed on a path between raw water and the primary water inlet of the primary membrane module, and a path between raw water and the water inlet of the secondary membrane module, wherein the raw water can be switched between the primary water inlet of the primary membrane module and the water inlet of the secondary membrane module by the two-position three-way valve.
10. A reverse osmosis water purifier, characterized in that it comprises a primary and secondary reverse osmosis membrane device according to any one of claims 1-9.
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| CN202121142829.7U CN215027697U (en) | 2021-05-25 | 2021-05-25 | Primary and secondary reverse osmosis membrane device and reverse osmosis water purifier |
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| CN202121142829.7U CN215027697U (en) | 2021-05-25 | 2021-05-25 | Primary and secondary reverse osmosis membrane device and reverse osmosis water purifier |
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2021
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