CN213390323U - Demineralized water supply device and demineralized water supply system - Google Patents
Demineralized water supply device and demineralized water supply system Download PDFInfo
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- CN213390323U CN213390323U CN202021880921.9U CN202021880921U CN213390323U CN 213390323 U CN213390323 U CN 213390323U CN 202021880921 U CN202021880921 U CN 202021880921U CN 213390323 U CN213390323 U CN 213390323U
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Abstract
The application discloses demineralized water supply equipment and demineralized water supply system, wherein demineralized water supply equipment includes: a demineralized water tank adapted to be placed over the test chamber; the inlet of the water supply pipeline is connected with the demineralized water main pipe, and the outlet of the water supply pipeline is connected with the upper connector of the demineralized water tank; the inlet of the test water taking main pipe is connected with the lower interface of the demineralized water tank, and the outlet of the test water taking main pipe is positioned below the lower interface of the demineralized water tank; the inlet of the at least one water taking branch pipe is connected to the test water taking main pipe, and the outlet of the at least one water taking branch pipe is positioned in the at least one test chamber; at least one water taking valve, the water taking valve is arranged at the outlet of the water taking branch pipe. The application provides a demineralized water supply equipment can guarantee that power plant laboratory uses the continuation of demineralized water, stable supply.
Description
Technical Field
The application relates to the technical field of chemical equipment, in particular to demineralized water supply equipment and a demineralized water supply system.
Background
The laboratory building of power plant includes a plurality of labs, and each labs carries out the laboratory to the water, oil, the coal of whole factory respectively to the concrete index parameter of analysis water, oil, coal, thereby guarantee the safety and stability operation of power plant. A large amount of demineralized water is required in daily work of a laboratory, so that ensuring stable supply of demineralized water in the laboratory is one of important works of a power plant.
In general, the demineralized water of the laboratory is derived from a demineralized water main pipe through which a large amount of demineralized water is transferred to the steam turbine room for replenishing water under the driving of a demineralized water pump, and a water supply pipe leading to the laboratory is connected to the demineralized water main pipe so that the demineralized water can be transferred to the laboratory also when the steam turbine room is replenished with water.
However, the steam turbine room does not all need the moisturizing at all times, and when the steam turbine room did not need the moisturizing, the demineralized water pump was in the off-state, and the demineralized water main pipe does not have the flow, and the laboratory can't take the demineralized water this moment, leads to relevant chemical examination work to be subject to the operation of demineralized water pump and can't develop.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application provides a demineralized water supply device and a demineralized water supply system, which can ensure the continuous and stable supply of demineralized water in a laboratory.
The following technical scheme is specifically adopted in the application:
an aspect of the present application is to provide a demineralized water supply apparatus applied to a laboratory of a power plant, the demineralized water supply apparatus including:
a demineralized water tank adapted to be placed over the test chamber;
the inlet of the water supply pipeline is connected with the demineralized water main pipe, and the outlet of the water supply pipeline is connected with the upper connector of the demineralized water tank;
the inlet of the test water taking main pipe is connected with the lower interface of the demineralized water tank, and the outlet of the test water taking main pipe is positioned below the lower interface of the demineralized water tank;
the inlet of the at least one water taking branch pipe is connected to the assay water taking main pipe, and the outlet of the at least one water taking branch pipe is positioned in the at least one assay chamber;
at least one water taking valve, wherein the water taking valve is arranged at an outlet of the water taking branch pipe.
Preferably, the water supply pipeline is provided with a water supply valve, and the water supply valve is used for controlling the conveying and stopping of the demineralized water in the water supply pipeline.
Preferably, the water supply valve is a manual control valve or an electric control valve.
Preferably, the demineralized water supply device further comprises a liquid level meter for acquiring a demineralized water level in the demineralized water tank;
when the desalted water level is higher than a first preset liquid level, the liquid level meter generates first prompt information, and the first prompt information is used for indicating that the water supply valve is closed;
when the desalted water level is lower than a second preset liquid level, the liquid level meter generates second prompt information, and the second prompt information is used for indicating that the water supply valve is opened;
wherein the first preset liquid level is higher than the second preset liquid level.
Preferably, when the water supply valve is an electrically controlled valve, the liquid level meter is interlocked with the water supply valve, and the water supply valve can be controlled by the opening and closing actions according to the desalted water level obtained by the liquid level meter.
Preferably, the demineralized water supply equipment further comprises a fault alarm device, wherein the fault alarm device is used for generating alarm prompt information when the demineralized water level acquired by the liquid level meter is lower than a third preset liquid level, and the third preset liquid level is lower than the second preset liquid level.
Preferably, the volume of the desalting water tank is greater than or equal to the sum of the water consumption of the single-day test of all the test chambers.
Preferably, a drainage valve is arranged on the assay water taking main pipe, the drainage valve is arranged at an outlet of the assay water taking main pipe, and the outlet of the assay water taking main pipe is not higher than the outlet of any water taking branch pipe.
Another aspect of the present application is to provide a demineralized water supply system including the above demineralized water supply apparatus.
Preferably, the demineralized water supply system further includes:
a demineralized water station for producing demineralized water;
the steam turbine room is used for receiving the desalted water;
the inlet of the desalted water main pipe is connected with the desalted water station, the outlet of the desalted water main pipe is connected with the steam turbine room, and a water supply pipeline in the desalted water supply device is connected to the desalted water main pipe;
and the desalting water pump is arranged on the desalting water main pipe and is used for providing power for conveying the desalting water.
The embodiment of the application has the beneficial effects that:
the utility model provides a demineralized water supply equipment, can acquire demineralized water and store it in the demineralized water case when the demineralized water pump operation, demineralized water in the demineralized water case is in proper order through the female pipe of assay water intaking and the self-flowing of water intaking branch pipe to each laboratory, can directly open the water intaking valve door and take when the laboratory needs use demineralized water, the problem of the intermittent water intaking of demineralized water for the assay has been solved, the continuation of the demineralized water of laboratory has been guaranteed, stable supply. And because the demineralized water tank is located the laboratory top, the demineralized water can rely on self gravity to flow to each laboratory, does not need additionally to use the water pump, can also the energy saving, has also eliminated the influence that is brought by the liquid level height in the demineralized water tank simultaneously, has extensive adaptability.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a demineralized water supply system provided in an embodiment of the present application.
The reference numerals denote:
101. a laboratory;
201. a demineralized water tank; 202. a water supply pipeline; 203. testing the water-taking main pipe; 204. a water taking branch pipe; 205. a water taking valve; 206. a water supply valve; 207. a liquid level meter; 208. a drain valve;
301. a desalted water station; 302. a steam turbine room; 303. a demineralized water main pipe; 304. a desalting water pump.
Detailed Description
In order to make the technical solutions and advantages of the present application clearer, the following will describe the embodiments of the present application in further detail with reference to the accompanying drawings.
The embodiment of the present application provides a demineralized water supply apparatus, which is generally applied to a laboratory 101 of a power plant, for supplying demineralized water to the laboratory 101. When a plurality of laboratories 101 exist in the power plant, if a plurality of laboratories 101 are located in the same laboratory building, all laboratories 101 may share one demineralized water supply device; if a plurality of laboratories 101 are not located in the same laboratory building, all of the laboratories 101 may be divided into a plurality of laboratory groups according to the distribution and concentration density of the respective laboratories 101, and a demineralized water supply apparatus may be provided for each laboratory group.
As shown in fig. 1, the demineralized water supply apparatus includes:
a demineralized water tank 201 adapted to be placed above the test chamber 101. Wherein, when a plurality of laboratories 101 are located in the same laboratory building, the desalting water tank 201 is located on the roof of the laboratory building; when a plurality of laboratories 101 are divided into a plurality of laboratory groups, the height of the desalting water tank 201 is higher than the building height of all the laboratories 101 in the laboratory group for each laboratory group.
A water supply pipeline 202, wherein the inlet of the water supply pipeline 202 is connected with the demineralized water main pipe 303, and the outlet of the water supply pipeline 202 is connected with the upper interface of the demineralized water tank 201. When a plurality of demineralized water supply devices are present, a plurality of water supply pipes 202 are connected to the demineralized water header pipe 303. After the demineralized water pump 304 is started, the demineralized water is delivered to the turbine room 302 through the demineralized water main pipe 303, and is also delivered to the corresponding demineralized water tank 201 through each water supply pipeline 202. Due to the limited capacity of the demineralized water tank 201 and the much smaller demand of the laboratory 101 for demineralized water than the demand of the steam engine room 302 for demineralized water, the pipe diameter of the water supply pipe 202 is generally smaller than that of the demineralized water main pipe 303.
The female pipe 203 of assay water intaking, the female import of 203 of assay water intaking and the lower part interface connection of demineralized water tank 201, the female export of 203 of assay water intaking is located the lower part interface below of demineralized water tank 201. In some embodiments, the lower interface may be disposed on a side of the demineralized water tank 201 close to the bottom, as close as possible to the bottom, so as to be able to drain the demineralized water in the demineralized water tank 201 as clean as possible when draining. Of course, the lower port may be directly provided at the bottom of the demineralized water tank 201 in order to completely drain the demineralized water. Under the action of gravity, the demineralized water is conveyed to each laboratory 101 through the test water taking main pipe 203, so that the outlet of the test water taking main pipe 203 is required to be lower than the lower interface, and the lower the outlet is, the better, for example, the vertical distance between the outlet of the test water taking main pipe 203 and the outdoor design ground can be smaller than that between the water taking part of the laboratory 101 with the lowest building height and the outdoor design ground. In the embodiment of the present application, "high" and "low" respectively refer to a distance from and a distance to an outdoor design ground.
At least one water intake branch pipe 204, an inlet of the at least one water intake branch pipe 204 is connected to the test water intake main pipe 203, and an outlet of the at least one water intake branch pipe 204 is located in the at least one test chamber 101. The demineralized water in the test water taking main pipe 203 is conveyed to each test chamber 101 through the water taking branch pipes 204, wherein the water taking branch pipes 204 can correspond to the test chambers 101 one by one, each water taking branch pipe 204 is connected to the test water taking main pipe 203, and the outlet of each water taking branch pipe 204 is exposed out of each test chamber 101 to be a water taking place.
At least one water taking valve 205, wherein the water taking valve 205 is arranged at the outlet of the water taking branch pipe 204. In order to facilitate the personnel in the laboratory to take the demineralized water, the outlet of each water intake branch pipe 204 can be provided with a water intake valve 205, the water intake valve 205 is kept closed at ordinary times, and the water intake valve 205 can be opened when water intake is needed.
The demineralized water supply equipment that the embodiment of the application provided can obtain demineralized water and store it in demineralized water tank 201 when demineralized water pump 304 moves, demineralized water in demineralized water tank 201 passes through assay water taking main pipe 203 and water taking branch pipe 204 in proper order and flows to each laboratory 101 by gravity, can directly open water taking valve 205 and take when laboratory 101 needs to use demineralized water, the problem of the intermittent water taking of demineralized water for assay has been solved, the continuation of laboratory demineralized water has been guaranteed, stable supply. And because demineralized water tank 201 is located laboratory 101 top, demineralized water can rely on self gravity to flow each laboratory 101 by oneself, does not need additionally to use the water pump, can also the energy saving, has also eliminated the influence that is brought by the liquid level height in the demineralized water tank 201 simultaneously, has extensive adaptability.
In some implementations of the embodiments of the present application, as shown in fig. 1, a water supply valve 206 is disposed on the water supply pipeline 202, and the water supply valve 206 is used for controlling the delivery and cutoff of the demineralized water in the water supply pipeline 202. When the amount of the demineralized water in the demineralized water tank 201 is insufficient, the water supply valve 206 is opened to replenish the demineralized water in the demineralized water tank 201. When the demineralized water in the demineralized water 201 reaches a set capacity, the water supply valve 206 is closed to prevent the demineralized water from overflowing. The water supply valve 206 may be a manual control valve or an electric control valve, among others. Correspondingly, when the water supply valve 206 is a manual control valve, the water supply valve 206 needs to be manually closed or opened by an operator, so that the operability and flexibility are strong, and the operator can close or open the water supply valve 206 at any time according to actual needs; when the water supply valve 206 is an electrically controlled valve, the electric actuator may automatically control the closing and opening of the water supply valve 206 according to a preset liquid level, without manual intervention, enabling automation.
In some implementations of embodiments of the present application, as shown in fig. 1, the demineralized water supply device further includes a liquid level meter 207, and the liquid level meter 207 is used for acquiring a demineralized water level in the demineralized water tank 201. When the desalted water level is higher than a first preset liquid level, the liquid level meter 207 generates first prompt information, and the first prompt information is used for indicating that the water supply valve 206 is closed; when the demineralized water level is lower than the second preset level, the level meter 207 generates a second prompt message for instructing to open the water supply valve 206. Wherein the first preset liquid level is higher than the second preset liquid level.
In some embodiments, the first preset liquid level may be a liquid level corresponding to a set volume of the demineralized water tank 201, and the set volume may be set by the demineralized water tank 201 during production or may be set and adjusted by an operator according to actual needs; the assay water consumption that can differ first settlement time between second preset liquid level and the first preset liquid level, first settlement time can be set up and adjust according to actual demand by operating personnel, for example for 3 ~ 6 hours.
The level meter 207 may convert the measured depth data of the demineralized water in the demineralized water tank 201 into an electrical signal, and then output to the terminal through the conversion module, and the terminal may process the received depth data and then visually display the level of the demineralized water in the display. When the desalted water level is higher than the first preset level, which indicates that the amount of desalted water in the desalted water tank 201 is enough, the supply of desalted water needs to be stopped, and at this time, the liquid level meter 207 may generate a first prompt message indicating that the water supply valve 206 is closed; when the demineralized water level is lower than the second preset level, which indicates that the demineralized water in the primary pressure water tank 201 is consumed more and the demineralized water needs to be replenished as soon as possible, the level meter 207 may generate a second prompt message indicating to open the water supply valve 206, so as to automatically replenish the demineralized water when the demineralized water pump 304 is running. Wherein the first prompt message and the second prompt message may take any form, such as sound, light, etc. In other embodiments of the present application, the first prompt message and the second prompt message may be generated by a terminal connected to the liquid level meter 207.
In order to reduce the possibility of inadvertent manual operation and to increase the sensitivity of the water supply valve 206 to the demineralized water level, in some implementations of the embodiments of the present application, when the water supply valve 206 is an electrically controlled valve, the level gauge 207 is interlocked with the water supply valve 206, and the water supply valve 206 is controlled by the on-off action of the demineralized water level acquired by the level gauge 207. Wherein, the liquid level meter 207 and the water supply valve 206 can realize interlocking control through the control device, and the interlocking control process can be as follows: when the liquid level meter detects that the demineralized water level reaches a first preset liquid level, first prompt information is generated, and the control device immediately controls the water supply valve to be closed; when the liquid level meter detects that the demineralized water level reaches a second preset liquid level, second prompt information is generated, and the control device immediately controls the water supply valve to be opened. After the water supply valve 206 is interlocked with the liquid level meter 207, the reaction time delay of opening and closing the water supply valve 206 is reduced, and the response speed and the control precision are improved.
In some implementation manners of the embodiment of the application, the demineralized water supply device further includes a fault alarm device, the fault alarm device is configured to generate alarm prompt information when the demineralized water level obtained by the liquid level meter 207 is lower than a third preset liquid level, and the third preset liquid level is lower than a second preset liquid level.
Under normal conditions, when the liquid level in the demineralized water tank 201 is low to the second preset liquid level, the water supply valve 206 is opened, the demineralized water in the demineralized water tank 201 can be supplemented after the operation of the demineralized water pump 304, and the normal demineralized water pump 304 can operate once every period of time, so the demineralized water in the demineralized water tank 201 can be supplemented in time, and the demineralized water level can not be too low. Once the demineralized water level is lower than the third predetermined level, it may be a leakage inside the demineralized water supply device, and at this time, the water intake is suspended, and the tank body, the pipes, and the valves of the demineralized water tank 201 are first overhauled. The alarm prompt message sent by the fault alarm device can instruct an operator to overhaul the demineralized water supply equipment.
The difference between the second preset level and the third preset level may be the amount of test water for a second set time, which may be set and adjusted by the operator according to the operation condition of the demineralized water pump 304, and the maximum interval between two adjacent operations of the demineralized water pump 304 is typically, for example, 4 hours.
In some implementations of embodiments of the present application, the volume of the demineralized water tank 201 is greater than or equal to the sum of the water usage for a single day test for all of the test chambers 101. The above-mentioned "all laboratories 101" refers to all laboratories 101 corresponding to one demineralized water supply device, and may be all laboratories 101 in the power plant, or may be a part of laboratories 101 in the power plant, that is, all laboratories 101 in one laboratory group. Then, the first preset level may be equal to or slightly less than the capacity of the demineralized water tank 201 (the "capacity" refers to the maximum capacity of the demineralized water tank 201, and is generally greater than or equal to the set capacity of the demineralized water tank 201), for example, the sum of the daily test water consumption of all the test chambers 101, and accordingly, the second preset level may be different from the first preset level by the test water consumption of all the test chambers 101 within 4 hours, and the third preset level may be different from the second preset level by the test water consumption of all the test chambers 101 within 4 hours.
If the demineralized water stored in the demineralized water tank 201 is not used up for a certain period of time, deterioration may occur. The desalted water with unqualified water quality can not be used as the water for the test, and the desalted water in the desalted water tank 201 needs to be emptied and cleaned, the reason of the deterioration of the desalted water is found and solved, and then the desalted water is filled with new desalted water. For this reason, in some implementations of the embodiments of the present application, as shown in fig. 1, a drainage valve 208 is disposed on the test water taking main pipe 203, the drainage valve 208 is disposed at an outlet of the test water taking main pipe 203, and the outlet of the test water taking main pipe 203 is not higher than an outlet of any water taking branch pipe 204, so that the demineralized water in the demineralized water tank 201 can be completely discharged through the drainage valve 208, and the safety and stability of the test water are ensured. Wherein the water quality detection of the demineralized water can be completed by a water quality detection device arranged in the demineralized water tank 201.
In addition, in order to prevent the demineralized water supply device from polluting the demineralized water, the demineralized water tank 201, each pipeline and each valve in the embodiment of the present application are made of stainless steel.
To sum up, the demineralized water supply equipment that this application embodiment provided can store demineralized water in demineralized water tank 201 when demineralized water pump 304 moves to through the interlocking control of feed water valve 206 and level gauge 207, can in time supply demineralized water when the demineralized water level in demineralized water tank 201 is lower, can in time block the transport of demineralized water and prevent overflowing when the demineralized water level is higher, thereby guaranteed that the water yield in demineralized water tank 201 is sufficient. And the demineralized water in the demineralized water tank 201 can be carried to each laboratory 101 through test water intake main pipe 203 and water intake branch pipe 204, can directly open the water intake valve 208 and take when the laboratory 101 needs to use the demineralized water, has solved the problem of the intermittent water intake of demineralized water for the test, has guaranteed continuation, the stable supply of laboratory demineralized water. Simultaneously because demineralized water tank 201 is located laboratory 101 top, demineralized water can rely on self gravity to flow each laboratory 101 by oneself, does not need additionally to use the water pump, can also the energy saving, has also eliminated the influence that is brought by the liquid level height in the demineralized water tank 201, has extensive adaptability.
The embodiment of the application also provides a demineralized water supply system, which comprises the demineralized water supply device. The demineralized water supply system is generally applied to a power plant, and the system can supply demineralized water to the laboratory 101 and also supply demineralized water to the steam room 302.
In some implementations of embodiments of the present application, as shown in fig. 1, the demineralized water supply system further includes:
a demineralized water station 301 for producing demineralized water, such as a chemical water treatment plant, capable of removing impurities such as suspended matters, colloids, inorganic anions, cations, etc. in raw water by using a water treatment process to obtain demineralized water;
the steam turbine room 302 is used for receiving demineralized water, and the received demineralized water enters a boiler in the steam turbine room 302 to supplement water in the boiler;
the system comprises a demineralized water main pipe 303, a demineralized water station 301, a demineralized water station 302, a demineralized water station 202, a demineralized water station;
and the demineralized water pump 304 is arranged on the demineralized water main pipe 303 and is used for providing power for conveying the demineralized water.
Compared with the demineralized water supply system in the prior art, because the demineralized water supply equipment for the laboratory is provided with the unique arrangement as described above, the demineralized water supply system provided by the embodiment of the application can ensure continuous and stable supply of the demineralized water for the laboratory and the steam turbine room.
In the present application, it is to be understood that the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.
The above description is only for facilitating the understanding of the technical solutions of the present application by those skilled in the art, and is not intended to limit the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A demineralized water supply device characterized in that it comprises:
a demineralized water tank (201) adapted to be placed above the test chamber (101);
the inlet of the water supply pipeline (202) is connected with the demineralized water main pipe (303), and the outlet of the water supply pipeline (202) is connected with the upper connector of the demineralized water tank (201);
a test water taking main pipe (203), wherein an inlet of the test water taking main pipe (203) is connected with a lower interface of the demineralized water tank (201), and an outlet of the test water taking main pipe (203) is positioned below the lower interface of the demineralized water tank (201);
at least one water intake branch pipe (204), the inlet of the at least one water intake branch pipe (204) is connected to the assay water intake main pipe (203), and the outlet of the at least one water intake branch pipe (204) is positioned in at least one assay chamber (101);
at least one water intake valve (205), wherein the water intake valve (205) is arranged at the outlet of the water intake branch pipe (204).
2. The demineralized water supply device according to claim 1, characterized in that a water supply valve (206) is arranged on the water supply pipeline (202), the water supply valve (206) is used for controlling the delivery and cut-off of demineralized water in the water supply pipeline (202).
3. The demineralized water supply apparatus according to claim 2, characterized in that the water supply valve (206) is a manually or electrically controlled valve.
4. The demineralized water supply device according to claim 3, characterized in that it further comprises a level meter (207), said level meter (207) being adapted to obtain a demineralized water level inside the demineralized water tank (201);
when the desalted water level is higher than a first preset liquid level, the liquid level meter (207) generates first prompt information, and the first prompt information is used for indicating that the water supply valve (206) is closed;
when the demineralized water level is lower than a second preset liquid level, the liquid level meter (207) generates second prompt information, and the second prompt information is used for indicating that the water supply valve (206) is opened;
wherein the first preset liquid level is higher than the second preset liquid level.
5. The demineralized water supply apparatus according to claim 4, characterized in that when said water supply valve (206) is an electrically controlled valve, said level meter (207) is interlocked with said water supply valve (206), and said water supply valve (206) is controlled by on-off action according to the demineralized water level obtained by said level meter (207).
6. The demineralized water supply device according to claim 4, characterized in that it further comprises a fault alarm device for generating an alarm prompt when the demineralized water level obtained by the level gauge (207) is lower than a third preset level, which is lower than the second preset level.
7. The demineralized water supply device of claim 1 characterized in that the capacity of the demineralized water tank (201) is greater than or equal to the sum of the water usage for a single day test of all the test chambers (101).
8. The demineralized water supply device according to claim 1, characterized in that a drain valve (208) is arranged on said test water intake main pipe (203), said drain valve (208) is arranged at the outlet of said test water intake main pipe (203), the outlet of said test water intake main pipe (203) is not higher than the outlet of any of said water intake branch pipes (204).
9. A demineralized water supply system characterized in that it comprises a demineralized water supply device according to any one of claims 1-8.
10. The demineralized water supply system of claim 9 further comprising:
a demineralized water station (301) for producing demineralized water;
a steam turbine room (302) for receiving the demineralized water;
a desalted water main pipe (303), wherein the inlet of the desalted water main pipe (303) is connected with the desalted water station (301), the outlet of the desalted water main pipe (303) is connected with the steam turbine room (302), and a water supply pipeline (202) in the desalted water supply device is connected to the desalted water main pipe (303);
the desalted water pump (304) is arranged on the desalted water main pipe (303) and used for providing power for conveying the desalted water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021880921.9U CN213390323U (en) | 2020-09-01 | 2020-09-01 | Demineralized water supply device and demineralized water supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021880921.9U CN213390323U (en) | 2020-09-01 | 2020-09-01 | Demineralized water supply device and demineralized water supply system |
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| CN213390323U true CN213390323U (en) | 2021-06-08 |
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| CN202021880921.9U Active CN213390323U (en) | 2020-09-01 | 2020-09-01 | Demineralized water supply device and demineralized water supply system |
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2020
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