CN205742364U - A kind of constant temperature and pressure water system - Google Patents
A kind of constant temperature and pressure water system Download PDFInfo
- Publication number
- CN205742364U CN205742364U CN201620422172.2U CN201620422172U CN205742364U CN 205742364 U CN205742364 U CN 205742364U CN 201620422172 U CN201620422172 U CN 201620422172U CN 205742364 U CN205742364 U CN 205742364U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 276
- 238000004321 preservation Methods 0.000 claims description 38
- 239000008235 industrial water Substances 0.000 claims description 15
- 125000004122 cyclic group Chemical group 0.000 abstract 3
- 230000008676 import Effects 0.000 abstract 1
- 230000003020 moisturizing effect Effects 0.000 description 12
- 238000004378 air conditioning Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Fluid-Pressure Circuits (AREA)
Abstract
A kind of constant temperature and pressure water system, including inlet channel, attemperater and Cool-water Machine for Industry group, described inlet channel is connected with attemperater, is provided with water level switch in attemperater, also includes water supply line, circulating backwater pipeline, by-pass line and cyclic water outlet pipeline；Wherein, one end of water supply line is connected with the feed water inlet of attemperater, one end of circulating backwater pipeline exports with the circulating backwater of attemperater and is connected, the other end of circulating backwater pipeline is connected with the water inlet of Cool-water Machine for Industry group, one end of by-pass line is connected with the bypass outlet of attemperater, the other end of by-pass line is connected with the other end of water supply line, one end of cyclic water outlet pipeline is connected with the circulating backwater import of attemperater, the other end of cyclic water outlet pipeline is connected with the outlet of Cool-water Machine for Industry group, and water level switch connects with PLC.This utility model have easy and simple to handle, control sensitive, hydraulic pressure and the most relatively stable feature of water temperature.
Description
Technical Field
The utility model relates to a constant temperature and constant pressure water supply system.
Background
According to the test requirements of the national standard GB 25034-. If tap water is adopted, the water temperature cannot meet the national standard requirement: in summer, the water temperature is higher than the specified value of the national standard, and in winter, the water temperature is lower than the specified value of the national standard. In addition, tap water pressure fluctuation is large, and water flow fluctuation is easily caused in the test process, so that the test result is influenced.
Chinese patent document No. CN 203413834U discloses a constant temperature circulating water supply system with cold and hot water impact test function in 2014, 29.01.29. the system comprises a central control unit, and the central control unit is connected with a cold water supply system and a hot water supply system respectively. The central control unit comprises a programmable logic controller and a frequency converter, the programmable logic controller is respectively connected to a cold water supply system and a hot water supply system, the output end of the programmable logic controller is connected to the input end of the frequency converter (5), and the output end of the frequency converter is respectively connected to the input end of the cold water supply system and the input end of the hot water supply system. The cold water supply system comprises a cold water tank, a cold water outlet water pump, a contactor and an air-cooled cold water air conditioning unit, wherein the programmable logic controller is connected with the air-cooled cold water air conditioning unit through the contactor, the air-cooled cold water air conditioning unit comprises an evaporator, the evaporator is arranged in the cold water tank, and a water outlet of the cold water tank is communicated with a water inlet of the cold water outlet water pump; the hot water supply system comprises a hot water tank, a hot water outlet pump, a solid-state relay and a heater, the programmable logic controller is connected to the heater through the solid-state relay, the heater is arranged in the hot water tank, and a water outlet of the hot water tank is communicated with a water inlet of the hot water outlet pump; and the output end of the frequency converter is respectively connected to the input end of the cold water outlet water pump and the input end of the hot water outlet water pump.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a constant temperature and constant pressure water supply system with simple operation and sensitive control to overcome the weak point in the prior art.
The constant-temperature and constant-pressure water supply system is structurally characterized by further comprising a water supply pipeline, a circulating water return pipeline, a bypass pipeline and a circulating water outlet pipeline; one end of the water supply pipeline is communicated with a water supply port of the heat preservation water tank, one end of the circulating water return pipeline is communicated with a circulating water return outlet of the heat preservation water tank, the other end of the circulating water return pipeline is communicated with a water inlet of the industrial water chilling unit, one end of the bypass pipeline is communicated with a bypass water outlet of the heat preservation water tank, the other end of the bypass pipeline is communicated with the other end of the water supply pipeline, one end of the circulating water outlet pipeline is communicated with a circulating water return inlet of the heat preservation water tank, the other end of the circulating water outlet pipeline is communicated with a water outlet of the industrial water chilling.
Further, be provided with the moisturizing solenoid valve on the inlet channel, this moisturizing solenoid valve meets with PLC.
Further, still be provided with the moisturizing ball valve on the inlet channel, this moisturizing ball valve is parallelly connected with the moisturizing solenoid valve.
Furthermore, a second butterfly valve, a circulating pump, a temperature transmitter, a first filter and a first butterfly valve are sequentially arranged on the circulating water return pipeline; the circulating pump meets with PLC, and temperature transmitter meets with PLC.
Furthermore, a third butterfly valve is arranged on the circulating water outlet pipeline.
Further, a fourth butterfly valve, a second filter, a water supply pump, a pressure transmitter and a fifth butterfly valve are sequentially arranged on the water supply pipeline, the water supply pump is connected with the PLC through a frequency converter, and the pressure transmitter is connected with the PLC.
Further, constant temperature and constant pressure water supply system, still include the overhead tank, this overhead tank passes through the by pass pipeline and communicates between working shaft and pressure transmitter.
Furthermore, one end of the bypass pipeline is communicated with the heat preservation water tank, the other end of the bypass pipeline is communicated between the water supply pump and the pressure transmitter, the pressure tank is communicated with the middle of the bypass pipeline, and a bypass ball valve is further arranged on the bypass pipeline and arranged between the heat preservation water tank and the pressure tank.
Furthermore, a precise pointer meter is further arranged on the water supply pipeline and is positioned between the water supply pump and the fifth butterfly valve.
One end of a water supply pipeline in the utility model is communicated with a water supply port of a heat preservation water tank, one end of a circulating water return pipeline is communicated with a circulating water return outlet of the heat preservation water tank, the other end of the circulating water return pipeline is communicated with a water inlet of an industrial water chilling unit, one end of a bypass pipeline is communicated with a bypass water outlet of the heat preservation water tank, the other end of the bypass pipeline is communicated with the other end of the water supply pipeline, one end of a circulating water outlet pipeline is communicated with a circulating water return inlet of the heat preservation water tank, the other end of the circulating water outlet pipeline is communicated with a water outlet of the industrial water; the PLC is mainly responsible for collecting data collected by the sensor and controlling the actions of the circulating pump, the water supply pump and the water replenishing electromagnetic valve; the touch screen is connected with the PLC, the touch screen serves as a human-computer interface, the functions of parameter setting and data real-time display can be provided, and the industrial water chilling unit can guarantee constant-temperature working conditions.
The water inlet pipeline of the utility model is provided with a water replenishing electromagnetic valve which is connected with the PLC; the water inlet pipeline is also provided with a water replenishing ball valve, and the water replenishing ball valve is connected with a water replenishing electromagnetic valve in parallel; the water can be supplied to the heat-preservation water tank by opening the water-supplying electromagnetic valve or the water-supplying ball valve, and when the water-supplying electromagnetic valve is damaged, the water can be manually supplied by the water-supplying ball valve; thereby enlarging the application range of the product.
The water supply pump of the utility model is connected with the PLC through the frequency converter, and the pressure transmitter is connected with the PLC; when the temperature of the water in the heat preservation water tank reaches the set temperature, the water supply pump can be started to supply water to the water using equipment. The user can set the water supply pressure on the touch screen, thereby automatically adjusting the water pressure. The utility model discloses a constant pressure water supply principle does: the water supply pump is driven by the frequency converter, and the rotating speed of the water pump is controlled by changing the frequency of the frequency converter, so that the purpose of adjusting the pressure is achieved; moreover, a pressure transmitter is arranged on the water supply pipeline, and signals collected by the pressure transmitter can be fed back to the PLC in real time; and the PLC performs PID operation according to the signal value fed back by the pressure transmitter and a set value of a user, and outputs different frequency signals to the frequency converter, so that the rotating speed of the water pump can be controlled.
One end of a bypass pipeline in the utility model is communicated with the heat preservation water tank, the other end of the bypass pipeline is communicated between the water supply pump and the pressure transmitter, the pressure tank is communicated with the middle part of the bypass pipeline, and a bypass ball valve is also arranged on the bypass pipeline and is arranged between the heat preservation water tank and the pressure tank; by providing the pressure tank, the water supply pressure can be made more stable.
To sum up, the utility model has the characteristics of easy and simple to handle, control sensitivity, can realize that automatic control supplies water temperature and water supply pressure, water pressure and temperature all comparatively stable.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a perspective view of the present invention.
Fig. 3 is a control block diagram of the present invention.
In the figure: 1 is the inlet channel, 2 is the moisturizing solenoid valve, 3 is the moisturizing ball valve, 4 is holding water tank, 5 is water level switch, 6 is the circulating pump, 7 is the industry cooling water set, 8 is the working shaft, 9 is the water supply pipe, 9.1 is the fourth butterfly valve, 9.2 is the second filter, 9.3 is the precision pointer table, 9.4 is pressure transmitter, 9.5 is the fifth butterfly valve, 10 is the circulation return water pipeline, 10.1 is temperature transmitter, 10.2 is first filter, 10.3 is first butterfly valve, 10.4 is the second butterfly valve, 11 is the by pass pipeline, 12 is the bypass ball valve, 13 is the overhead tank, 14 is the circulation outlet conduit, 14.1 is the third butterfly valve, 20 is the bottom plate, 21 is the electric cabinet.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
Referring to fig. 1-3, the constant temperature and pressure water supply system comprises a water inlet pipeline 1, a heat preservation water tank 4 and an industrial water chilling unit 7, wherein the water inlet pipeline 1 is communicated with the heat preservation water tank 4, a water level switch 5 is arranged in the heat preservation water tank 4, and the constant temperature and pressure water supply system further comprises a water supply pipeline 9, a circulating water return pipeline 10, a bypass pipeline 11 and a circulating water outlet pipeline 14; wherein, one end of the water supply pipeline 9 is communicated with the water supply opening of the heat preservation water tank 4, one end of the circulating water return pipeline 10 is communicated with the circulating water return outlet of the heat preservation water tank 4, the other end of the circulating water return pipeline 10 is communicated with the water inlet of the industrial water chilling unit 7, one end of the bypass pipeline 11 is communicated with the bypass water outlet of the heat preservation water tank 4, the other end of the bypass pipeline 11 is communicated with the other end of the water supply pipeline 9, one end of the circulating water outlet pipeline 14 is communicated with the circulating water return inlet of the heat preservation water tank 4, the other end of the circulating water outlet pipeline 14 is communicated with the water outlet of the industrial water chilling. The water level switch 5 feeds back a liquid level signal to the PLC.
In this embodiment, be provided with moisturizing solenoid valve 2 on the inlet channel 1, this moisturizing solenoid valve 2 meets with PLC.
Still be provided with moisturizing ball valve 3 on the inlet channel 1, this moisturizing ball valve 3 is parallelly connected with moisturizing solenoid valve 2.
The circulating water return pipeline 10 is sequentially provided with a second butterfly valve 10.4, a circulating pump 6, a temperature transmitter 10.1, a first filter 10.2 and a first butterfly valve 10.3; the circulating pump 6 is connected with the PLC, and the temperature transmitter 10.1 is connected with the PLC. The temperature transmitter 10.1 feeds back a temperature signal to the PLC.
And a third butterfly valve 14.1 is arranged on the circulating water outlet pipeline 14.
The last fourth butterfly valve 9.1, the second filter 9.2, the working shaft 8, pressure transmitter 9.4 and the fifth butterfly valve 9.5 of having set gradually of water supply pipe 9, working shaft 8 meets with PLC through the converter, and pressure transmitter 9.4 meets with PLC. The pressure transmitter 9.4 feeds back a pressure signal to the PLC.
The water supply pump is driven by the frequency converter, and the rotating speed of the water supply pump is controlled by changing the frequency of the frequency converter, so that the purpose of adjusting the pressure is achieved.
In this embodiment, the PLC may control the operation states of the water supply pump 8, the water replenishment solenoid valve 2, and the circulation pump 6.
The constant-temperature and constant-pressure water supply system further comprises a pressure tank 13, and the pressure tank 13 is communicated between the water supply pump 8 and the pressure transmitter 9.4 through a bypass pipeline 11.
The pressure transmitter can feed back to the PLC in real time. The pressure tank can make the water supply pressure more stable.
One end of the bypass pipeline 11 is communicated with the heat preservation water tank 4, the other end of the bypass pipeline 11 is communicated between the water supply pump 8 and the pressure transmitter 9.4, the pressure tank 13 is communicated with the middle of the bypass pipeline 11, a bypass ball valve 12 is further arranged on the bypass pipeline 11, and the bypass ball valve 12 is arranged between the heat preservation water tank 4 and the pressure tank 13.
The bypass ball valve functions to protect the feed water pump 8. The bypass ball valve should be slightly open. When the user's water consuming device stops consuming water, no water flows through the water supply line 9. At this time, if there is no bypass, the water supply pump 8 is always turned to have no water flow for a long time, thereby affecting the life of the water supply pump 8. And after the bypass pipeline 11 is additionally arranged, the water can be ensured to flow circularly all the time, thereby protecting the water supply pump 8.
When the water in the heat-preservation water tank is reduced to a low liquid level, the water supply pump automatically stops and gives an alarm to protect the water pump.
And a precision pointer meter 9.3 is also arranged on the water supply pipeline 9, and the precision pointer meter 9.3 is positioned between the water supply pump 8 and a fifth butterfly valve 9.5.
In this embodiment, circulation return water pipeline and water supply pipe all adopt the cotton package of heat preservation, prevent with external heat exchange, the energy saving.
In the embodiment, the whole product is arranged on the bottom plate 20, so that the structure is compact, the installation is convenient, and the loading, unloading and transportation of the forklift are convenient; when the water pipe is transported to a construction site, the water pipe, the water supply pipe and the power supply are connected to work. Moreover, the electric control part of the whole product, including the PLC and the touch screen, is arranged in the electric cabinet 21, so that the operation is convenient, and the anti-theft effect is achieved.
Before working, firstly opening a water replenishing electromagnetic valve to fill water into a heat preservation water tank; when the water replenishing electromagnetic valve is damaged, the water can be manually replenished by using the water replenishing ball valve. The heat preservation water tank is provided with a water level switch, and when the water level reaches a preset high liquid level, the water replenishing electromagnetic valve is automatically closed. The heat preservation water tank can select different capacities according to the water supply flow and the continuous service time so as to meet the requirements of customers.
When the system works, the circulating pump is started, the industrial water chilling unit is started, the refrigerating or heating mode is selected, and the temperature is set. The water in the heat-preservation water tank is pumped by the circulating pump, is sent to an industrial water chilling unit for cooling or heating, and then returns to the heat-preservation water tank. The circulation is carried out until the water in the heat preservation water tank reaches the set temperature. And when the set temperature is reached, the industrial water chilling unit automatically stops. When the water temperature exceeds the set temperature range, the industrial water chilling unit automatically starts to work until the water temperature reaches the set temperature.
And after the water temperature reaches the set temperature, starting the water supply pump to supply water to the water using equipment of the user. The user can set the water supply pressure in the touch screen, the utility model discloses can automatically regulated water pressure
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A constant-temperature and constant-pressure water supply system comprises a water inlet pipeline (1), a heat preservation water tank (4) and an industrial water chilling unit (7), wherein the water inlet pipeline (1) is communicated with the heat preservation water tank (4), a water level switch (5) is arranged in the heat preservation water tank (4), and the system is characterized by further comprising a water supply pipeline (9), a circulating water return pipeline (10), a bypass pipeline (11) and a circulating water outlet pipeline (14); wherein,
one end of the water supply pipeline (9) is communicated with a water supply port of the heat preservation water tank (4),
one end of the circulating water return pipeline (10) is communicated with a circulating water return outlet of the heat preservation water tank (4), the other end of the circulating water return pipeline (10) is communicated with a water inlet of the industrial water chilling unit (7),
one end of the bypass pipeline (11) is communicated with a bypass water outlet of the heat preservation water tank (4), the other end of the bypass pipeline (11) is communicated with the other end of the water supply pipeline (9),
one end of the circulating water outlet pipeline (14) is communicated with a circulating water return inlet of the heat preservation water tank (4), the other end of the circulating water outlet pipeline (14) is communicated with a water outlet of the industrial water chilling unit (7),
the water level switch (5) is connected with the PLC.
2. The constant temperature and pressure water supply system according to claim 1, wherein the water inlet pipe (1) is provided with a water replenishing solenoid valve (2), and the water replenishing solenoid valve (2) is connected with a PLC.
3. The constant temperature and pressure water supply system according to claim 2, wherein the water inlet pipe (1) is further provided with a water replenishing ball valve (3), and the water replenishing ball valve (3) is connected with the water replenishing electromagnetic valve (2) in parallel.
4. The constant temperature and pressure water supply system according to claim 1, wherein the circulating water return pipe (10) is provided with a second butterfly valve (10.4), a circulating pump (6), a temperature transmitter (10.1), a first filter (10.2) and a first butterfly valve (10.3) in sequence; the circulating pump (6) is connected with the PLC, and the temperature transmitter (10.1) is connected with the PLC.
5. The constant temperature and pressure water supply system according to claim 1, wherein the circulating water outlet pipe (14) is provided with a third butterfly valve (14.1).
6. The constant temperature and pressure water supply system according to any one of claims 1 to 5, wherein a fourth butterfly valve (9.1), a second filter (9.2), a water supply pump (8), a pressure transmitter (9.4) and a fifth butterfly valve (9.5) are sequentially arranged on the water supply pipeline (9), the water supply pump (8) is connected with the PLC through a frequency converter, and the pressure transmitter (9.4) is connected with the PLC.
7. The constant temperature and pressure water supply system according to claim 6, further comprising a pressure tank (13), wherein the pressure tank (13) is communicated between the water supply pump (8) and the pressure transmitter (9.4) through a bypass pipe (11).
8. The constant temperature and pressure water supply system according to claim 7, wherein one end of the bypass pipe (11) is communicated with the thermal water tank (4), the other end of the bypass pipe (11) is communicated between the water supply pump (8) and the pressure transmitter (9.4), the pressure tank (13) is communicated with the middle part of the bypass pipe (11), and the bypass pipe (11) is further provided with a bypass ball valve (12), and the bypass ball valve (12) is arranged between the thermal water tank (4) and the pressure tank (13).
9. The constant temperature and pressure water supply system as claimed in claim 6, wherein the water supply pipeline (9) is further provided with a precision pointer meter (9.3), and the precision pointer meter (9.3) is positioned between the water supply pump (8) and a fifth butterfly valve (9.5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620422172.2U CN205742364U (en) | 2016-05-11 | 2016-05-11 | A kind of constant temperature and pressure water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620422172.2U CN205742364U (en) | 2016-05-11 | 2016-05-11 | A kind of constant temperature and pressure water system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205742364U true CN205742364U (en) | 2016-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620422172.2U Expired - Fee Related CN205742364U (en) | 2016-05-11 | 2016-05-11 | A kind of constant temperature and pressure water system |
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| CN (1) | CN205742364U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476375A (en) * | 2017-08-01 | 2017-12-15 | 优晖科技（北京）有限公司 | Water heat accumulation constant temperature water supply system |
| CN109596277A (en) * | 2019-01-17 | 2019-04-09 | 上海出入境检验检疫局工业品与原材料检测技术中心 | A kind of system for packing container constant temperature air seal test |
| CN110715452A (en) * | 2018-07-13 | 2020-01-21 | 广州市中南机电工程有限公司 | Control system of full-function water heater |
| CN110848790A (en) * | 2019-11-28 | 2020-02-28 | 清远众鑫热能热水设备有限公司 | Wireless remote variable-frequency constant-temperature and constant-pressure water supply system |
| CN111636518A (en) * | 2020-06-11 | 2020-09-08 | 中国船舶科学研究中心 | Saturated diving living cabin domestic water supply system |
| CN111733930A (en) * | 2020-05-20 | 2020-10-02 | 河南光远新材料股份有限公司 | Constant-temperature and constant-liquid-level water supply system for electronic-grade glass fiber drawing and spraying |
-
2016
- 2016-05-11 CN CN201620422172.2U patent/CN205742364U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476375A (en) * | 2017-08-01 | 2017-12-15 | 优晖科技（北京）有限公司 | Water heat accumulation constant temperature water supply system |
| CN110715452A (en) * | 2018-07-13 | 2020-01-21 | 广州市中南机电工程有限公司 | Control system of full-function water heater |
| CN110715452B (en) * | 2018-07-13 | 2021-06-29 | 广州市中南机电工程有限公司 | Control system of full-function water heater |
| CN109596277A (en) * | 2019-01-17 | 2019-04-09 | 上海出入境检验检疫局工业品与原材料检测技术中心 | A kind of system for packing container constant temperature air seal test |
| CN109596277B (en) * | 2019-01-17 | 2023-12-15 | 上海海关工业品与原材料检测技术中心 | System for be used for packaging container constant temperature airtight test |
| CN110848790A (en) * | 2019-11-28 | 2020-02-28 | 清远众鑫热能热水设备有限公司 | Wireless remote variable-frequency constant-temperature and constant-pressure water supply system |
| CN111733930A (en) * | 2020-05-20 | 2020-10-02 | 河南光远新材料股份有限公司 | Constant-temperature and constant-liquid-level water supply system for electronic-grade glass fiber drawing and spraying |
| CN111636518A (en) * | 2020-06-11 | 2020-09-08 | 中国船舶科学研究中心 | Saturated diving living cabin domestic water supply system |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20210511 |
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| CF01 | Termination of patent right due to non-payment of annual fee |