CN211004691U - Water storage tank for ultrapure water machine special for laboratory - Google Patents
Water storage tank for ultrapure water machine special for laboratory Download PDFInfo
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- CN211004691U CN211004691U CN201921457561.9U CN201921457561U CN211004691U CN 211004691 U CN211004691 U CN 211004691U CN 201921457561 U CN201921457561 U CN 201921457561U CN 211004691 U CN211004691 U CN 211004691U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 138
- 229910021642 ultra pure water Inorganic materials 0.000 title claims abstract description 55
- 239000012498 ultrapure water Substances 0.000 title claims abstract description 55
- 238000003860 storage Methods 0.000 title claims abstract description 51
- 238000007789 sealing Methods 0.000 claims abstract description 42
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 230000009467 reduction Effects 0.000 claims abstract description 7
- 239000012780 transparent material Substances 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 38
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 32
- 238000001223 reverse osmosis Methods 0.000 claims description 23
- 239000012528 membrane Substances 0.000 claims description 22
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 5
- 239000000806 elastomer Substances 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 3
- 230000007774 longterm Effects 0.000 abstract description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 11
- 239000012535 impurity Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- SDGKUVSVPIIUCF-UHFFFAOYSA-N 2,6-dimethylpiperidine Chemical compound CC1CCCC(C)N1 SDGKUVSVPIIUCF-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 210000003709 heart valve Anatomy 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
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Abstract
The utility model discloses a water storage tank for a laboratory-dedicated ultrapure water machine, which comprises a tank body, wherein the upper part of the tank body is provided with a water inlet of ultrapure water, the lower part of the tank body is provided with a water outlet hole, and the lateral part of the tank body is provided with a gas outlet hole; the water outlet pipe is communicated with a water outlet hole of the water tank; the high-pressure gas unit is communicated with the upper part of the box body through a pressure reducing valve; and the air outlet unit with constant-pressure sealing filtration is communicated with an air outlet hole at the side part of the water tank. The water outlet pipe comprises a non-horizontal placing section, the non-horizontal placing section is made of transparent materials, two valves are further arranged on the water outlet pipe, and the non-horizontal placing section is located between the two valves; the water storage tank for the ultrapure water machine special for the laboratory further comprises an air seal unit, wherein one end of the air seal unit is communicated with the high-pressure gas unit through a pressure reduction valve, and the other end of the air seal unit is communicated with the non-horizontal placing section of the water outlet pipe. The utility model discloses can still guarantee after long-term the use that ultrapure water can not contact with outside gas etc. guarantees the purity of ultrapure water.
Description
Technical Field
The utility model relates to a measurement field of testing, concretely relates to special ultrapure water storage water tank for water purification machine in laboratory.
Background
Ultrapure water (ultra water), also known as UP water, is water having a resistivity of 18M Ω cm (25 ℃). The water has few impurities except water molecules, no organic matters such as bacteria, viruses and chlorine-containing dioxin, and certainly no mineral trace elements required by human bodies, namely water with all atoms except oxygen and hydrogen removed. Can be used for the preparation process of ultrapure materials (semiconductor element materials, nano fine ceramic materials and the like) by applying distillation, deionization, reverse osmosis technology or other appropriate supercritical fine technology.
Ultrapure water has a wide range of applications in various fields, for example, in the field of detection, and can be used as dilution water. There are many existing apparatuses for preparing ultrapure water, and the ultrapure water is prepared at a low speed and stored in a container for use. However, the ultrapure water cannot directly contact with air due to its characteristics, otherwise carbon dioxide and other impurities in the air will be rapidly dissolved in water, resulting in a rapid decrease in the resistivity of the ultrapure water, a decrease in the water quality, and a decrease in the water utilization rate.
Patent publication No. CN206843100U entitled Water sealed Box apparatus for ultrapure water production; the patent publication No. CN208087259U is named as a patent of a water storage sterile water tank for an ultrapure water machine; and CN205991202U entitled a water seal device for ultrapure water tank, all disclose a storage container for ultrapure water and a device for preventing the ultrapure water from contacting with air. However, in the technical solutions disclosed in the above patents, the gas outside the water tank may contact the ultrapure water inside the water tank through a pipe or the like during long-term use.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defect of prior art, the utility model aims at providing a special ultrapure water storage water tank for laboratory can guarantee still that ultrapure water can not contact with outside gas etc. after long-term the use, guarantees the pure degree of ultrapure water.
The purpose of the utility model is realized through such technical scheme:
a water storage tank for ultrapure water machine special for laboratory comprises,
the upper part of the box body is provided with a water inlet of ultrapure water, the lower part of the box body is provided with a water outlet hole, and the side part of the box body is provided with a gas outlet hole;
the water outlet pipe is communicated with a water outlet hole of the water tank;
the high-pressure gas unit is communicated with the upper part of the box body through a pressure reducing valve;
and the air outlet unit with constant-pressure sealing filtration is communicated with an air outlet hole at the side part of the water tank.
Furthermore, the water outlet pipe comprises a non-horizontal placing section, the non-horizontal placing section is made of transparent materials, two valves are further arranged on the water outlet pipe, and the non-horizontal placing section is located between the two valves;
the water storage tank for the ultrapure water machine special for the laboratory also comprises a water storage tank,
and one end of the air seal unit is communicated with the high-pressure gas unit through a pressure reduction valve, and the other end of the air seal unit is communicated with the non-horizontal placing section of the water outlet pipe.
Further, the gas sealing unit comprises a gas sealing unit,
the air sealing head is in a funnel shape, the opening end surface is provided with a baffle plate with holes, the inner end surface is provided with an outward groove, the groove is positioned right below the air sealing head, and the inner surface of the groove and the inner surface of the air sealing head are in smooth transition;
the air sealing ball is arranged in the air sealing head, and the distance between the groove and the reduced end of the air sealing head does not exceed the radius of the air sealing ball;
and one end of the air seal pipe is communicated with the reduction end of the air seal head, and the other end of the air seal pipe is communicated with the non-horizontal placing section of the water outlet pipe.
Further, the gas outlet unit includes,
the water containing tank is internally provided with reverse osmosis membranes for separating the upper part and the lower part of the tank body;
one end of the air outlet pipe is communicated with the upper part of the box body, and the other end of the air outlet pipe is communicated with the lower part of the water containing tank;
and the sealing unit comprises at least two elastic bodies, all the elastic bodies are fixedly connected with the inner wall of the air outlet pipe, and the air outlet pipe can be communicated and sealed under the action of air pressure.
Further, the elastomer is a spherical elastomer; and a reverse osmosis membrane is also arranged in the air outlet pipe.
Further, the inside reverse osmosis membrane that still is equipped with of box, reverse osmosis membrane separates the venthole on with the box, high-pressure gas unit intercommunication portion with box apopore and water inlet.
Further, the high-pressure gas unit adopts a high-pressure nitrogen cylinder, and the unit nitrogen cylinder is communicated with the pressure reduction valve through a filter pipe.
Due to the adoption of the technical scheme, the utility model discloses following advantage has:
choose high-pressure gas unit as sealed gas in this application for the storage water tank is after the outer water that drains, and the inside pressure of storage water tank still remains balanced, and the in-process of draining simultaneously can not have outside atmosphere to get into inside the storage water tank. When the water storage tank increases the water storage capacity, the gas in the water storage tank is discharged through the constant-pressure sealing filtering unit, and the water storage tank is communicated with the outside only when the water storage tank increases the water storage capacity by means of setting of constant pressure, so that the time for communicating with the outside is reduced, and the possibility of polluting the water storage tank by external gas is further reduced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
The drawings of the utility model are as follows:
fig. 1 is a schematic structural view of a water storage tank for a laboratory-dedicated ultrapure water machine in embodiment 1.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
FIG. 3 is a schematic view of section B-B in FIG. 1.
In the figure: 1. a box body; 11. a water inlet; 12. a water outlet hole; 13. an air outlet; 2. a water outlet pipe; 21. a non-horizontally disposed section; 22. a valve; 3. a high-pressure nitrogen cylinder; 41. a water containing tank; 42. an air outlet pipe; 43. a sealing unit; 431. a spherical elastomer; 51. sealing the end by gas; 511. a groove; 512. a baffle plate with holes; 52. air sealing balls; 53. a gas seal pipe; 6. a reverse osmosis membrane; 7. a filter tube; 8. a pressure reducing valve; 9. ultrapure water.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example 1:
as shown in fig. 1 to 3, the water storage tank for ultrapure water for laboratory use 9 comprises,
the upper part of the box body 1 is provided with a water inlet 11 of ultrapure water 9, the lower part of the box body is provided with a water outlet 12, and the side part of the box body is provided with an air outlet 13;
the water outlet pipe 2 is communicated with a water outlet hole 12 of the water tank;
the high-pressure gas unit is communicated with the upper part of the box body 1 through a pressure reducing valve 8;
and the air outlet unit with constant-pressure sealing filtration is communicated with an air outlet 13 at the side part of the water tank.
Choose high-pressure gas unit as sealed gas in this application for the storage water tank is after the outer water that drains, and the inside pressure of storage water tank still remains balanced, and the in-process of draining simultaneously can not have outside atmosphere to get into inside the storage water tank. When the water storage tank increases the water storage capacity, the gas in the water storage tank is discharged through the constant-pressure sealing filtering unit, and the water storage tank is communicated with the outside only when the water storage tank increases the water storage capacity by means of setting of constant pressure, so that the time for communicating with the outside is reduced, and the possibility of polluting the water storage tank by external gas is further reduced.
In this embodiment, the water outlet pipe 2 includes a non-horizontal placement section 21, the non-horizontal placement section 21 is made of a transparent material, two valves 22 are further disposed on the water outlet pipe 2, and the non-horizontal placement section 21 is located between the two valves 22;
the water storage tank for the ultrapure water 9 machine special for the laboratory also comprises,
and one end of the air seal unit is communicated with the high-pressure gas unit through a pressure reducing valve 8 door 22, and the other end of the air seal unit is communicated with the non-horizontal placing section 21 of the water outlet pipe 2.
The water outlet pipe 2 is partially horizontally arranged, two valves 22 are arranged at two ends, so that after the valves 22 are opened to take water, in order to prevent the outermost valve 22 from contacting air, the valve is contacted with ultrapure water 9, and further the ultrapure water 9 in the water storage tank is polluted in an extending mode, therefore, after the water taking is finished, the two valves 22 are closed, the air seal head 5 is lightly tapped or the nitrogen gas injection air seal pipe 53 is independently controlled, the outermost valve 22 is opened, part of water is discharged, at the moment, the nitrogen gas enters the water outlet pipe 2 between the two valves 22, and then the outermost valve 22 is closed, so that the ultrapure water 9 is isolated from the outermost valve 22 by the nitrogen gas.
In this embodiment, the gas sealing unit includes,
the air sealing head 5 is funnel-shaped, the opening end surface is provided with a baffle 512 with holes, the inner end surface is provided with an outward groove 511, the groove 511 is positioned right below the air sealing head 5, and the inner surface of the groove 511 and the inner surface of the air sealing head 5 are in smooth transition;
the air sealing ball 52 is arranged in the air sealing head 5, and the distance between the groove 511 and the reduced end of the air sealing head 5 does not exceed the radius of the air sealing ball 52;
one end of the air seal pipe 53 is communicated with the reduced end of the air seal head 5, and the other end is communicated with the non-horizontal placing section 21 of the water outlet pipe 2.
The nitrogen is communicated with the gas seal pipe 53 through the gas seal head 5, and the gas seal ball 52 and the groove 511 which are arranged in the gas seal head 5 can seal the gas seal pipe 53 when the pressure difference is applied.
In this embodiment, the air outlet unit includes,
the middle part of the water containing tank 41 is provided with a reverse osmosis membrane 6 for separating the upper part and the lower part of the tank body 1;
an air outlet pipe 42, one end of which is communicated with the upper part of the tank body 1 and the other end of which is communicated with the lower part of the water tank 41;
the sealing unit 43 includes two elastic bodies, all of which are fixedly connected with the inner wall of the air outlet pipe 42, and the air outlet pipe 42 can be communicated and sealed under the action of air pressure.
The two elastic bodies seal the sealing unit 43, when the air pressure in the water storage tank is increased, the two elastic bodies are spread by the air in the water storage tank, and the air is discharged through the air outlet pipe 42.
Meanwhile, in order to reduce the possibility of pollution of outside gas to the inside of the water storage tank, the water storage tank 41 is arranged on the air outlet pipe 42, the reverse osmosis membrane 6 is arranged in the water storage tank 41, external atmosphere can be prevented from entering, meanwhile, in order to prevent the reverse osmosis membrane 6 in the water dissolving tank from being damaged (communicated with the outside and easily damaged), the reverse osmosis membrane 6 is disabled, the reverse osmosis membrane 6 is arranged in the air outlet pipe 42, and meanwhile, the reverse osmosis membrane 6 in the water outlet pipe 2 can also block impurities and the like possibly generated by the sealing unit 43.
In this embodiment, the elastic body is a spherical elastic body 431; a reverse osmosis membrane 6 is also arranged in the air outlet pipe 42.
In the case of the prosthetic heart valve, the outlet tube 42 is completely sealed by means of the spherical elastic body 431 and can be opened by air pressure.
In this embodiment, the inside reverse osmosis membrane 6 that still is equipped with of box 1, reverse osmosis membrane 6 separates outlet hole 13, the high-pressure gas unit intercommunication portion on with box 1 apopore 12 and water inlet 11 on box 1.
The reverse osmosis membrane 6 is provided in the tank 1 to separate the ultrapure water 9 from components which may generate impurities and may come into contact with the outside.
In this embodiment, the high-pressure gas unit adopts a high-pressure nitrogen cylinder 3, and the unit nitrogen cylinder is communicated with a gate 22 of a pressure reducing valve 8 through a filter pipe 7.
Adopt pure nitrogen gas can not pollute ultrapure water 9, high-pressure nitrogen gas bottle 3 simultaneously can change, can carry out certain impurity through filter tube 7 and shelter from when changing, can set up conventional filtration thing in the filter tube 7 and also can set up reverse osmosis membrane 6. The pressure reducing valve 8 is a miniature pressure reducing valve 8 manufactured by Shanghai Munry valve 22 Limited and having a model number of YOC 12R-1.3R. The pressure intensity at two ends can be checked by the miniature pressure reducing valve 8, and the high-pressure nitrogen cylinder 3 is convenient to replace.
The water tank for ultrapure water 9 for laboratory use in this embodiment is used by attaching the high-pressure nitrogen gas cylinder 3 to the filter pipe 7 and injecting a certain amount of ultrapure water 9 into the water tank 41 so that the ultrapure water 9 is positioned below the reverse osmosis membrane 6.
Starting the ultrapure water 9 preparation machine, injecting the prepared ultrapure water 9 into the box body 1, gradually increasing the pressure in the box body 1 at the moment, opening the spherical elastic body 431 on the air outlet pipe 42 after the gas in the box body 1 passes through the reverse osmosis membrane 6 on the water outlet pipe 2, and then allowing the gas to enter the water containing tank 41 and finally discharging.
After a certain amount of ultrapure water 9 is stored in the tank 1, the ultrapure water 9 preparation machine is turned off. When the ultra-high water is needed, the two valves 22 on the water outlet pipe 2 are opened, the ultra-high water 9 flows out from the water storage tank, at this time, in order to balance the air pressure, the high-pressure nitrogen enters the water storage tank, and simultaneously the high-pressure nitrogen is discharged into the atmosphere through the air seal head 5 and the air seal pipe 53, but under the action of the pressure difference, the high-pressure nitrogen pushes the air seal ball 52 from the groove 511, and finally the air seal ball 52 blocks the air seal pipe 53, so that only the ultra-high water 9 is left through the water outlet pipe 2.
After receiving the ultrapure water 9, the two valves 22 on the water outlet pipe 2 are closed. At this time, due to the reason of air pressure balance, the air sealing ball 52 is no longer influenced by the high-pressure nitrogen, and the air sealing head 5 is lightly flapped, so that the air sealing ball 52 no longer blocks the air sealing pipe 53. The outermost valves 22 are then slowly opened and the ultrapure water 9 between the two valves 22 is allowed to flow out under the action of the high-pressure nitrogen gas and gravity. When the ultrapure water 9 between the two valves 22 is completely discharged, the outermost valve 22 is closed, and the high-pressure nitrogen gas is blocked between the outermost valve 22 and the inner valve 22.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (7)
1. The water storage tank for the ultrapure water machine special for the laboratory is characterized by comprising,
the upper part of the box body is provided with a water inlet of ultrapure water, the lower part of the box body is provided with a water outlet hole, and the side part of the box body is provided with a gas outlet hole;
the water outlet pipe is communicated with a water outlet hole of the water tank;
the high-pressure gas unit is communicated with the upper part of the box body through a pressure reducing valve;
and the air outlet unit with constant-pressure sealing filtration is communicated with an air outlet hole at the side part of the water tank.
2. The water storage tank for ultrapure water for laboratory use according to claim 1, wherein,
the water outlet pipe comprises a non-horizontal placing section, the non-horizontal placing section is made of transparent materials, two valves are further arranged on the water outlet pipe, and the non-horizontal placing section is located between the two valves;
the water storage tank for the ultrapure water machine special for the laboratory also comprises a water storage tank,
and one end of the air seal unit is communicated with the high-pressure gas unit through a pressure reduction valve, and the other end of the air seal unit is communicated with the non-horizontal placing section of the water outlet pipe.
3. The water storage tank for ultrapure water for laboratory use according to claim 2 wherein the air seal unit comprises,
the air sealing head is in a funnel shape, the opening end surface is provided with a baffle plate with holes, the inner end surface is provided with an outward groove, the groove is positioned right below the air sealing head, and the inner surface of the groove and the inner surface of the air sealing head are in smooth transition;
the air sealing ball is arranged in the air sealing head, and the distance between the groove and the reduced end of the air sealing head does not exceed the radius of the air sealing ball;
and one end of the air seal pipe is communicated with the reduction end of the air seal head, and the other end of the air seal pipe is communicated with the non-horizontal placing section of the water outlet pipe.
4. The water storage tank for ultrapure water for laboratory use according to claim 1, wherein the air outlet unit comprises,
the water containing tank is internally provided with reverse osmosis membranes for separating the upper part and the lower part of the tank body;
one end of the air outlet pipe is communicated with the upper part of the box body, and the other end of the air outlet pipe is communicated with the lower part of the water containing tank;
and the sealing unit comprises at least two elastic bodies, all the elastic bodies are fixedly connected with the inner wall of the air outlet pipe, and the air outlet pipe can be communicated and sealed under the action of air pressure.
5. The water storage tank for ultrapure water for laboratory use according to claim 4, wherein the elastomer is a spherical elastomer; and a reverse osmosis membrane is also arranged in the air outlet pipe.
6. The water storage tank for the ultrapure water for the laboratory according to any one of claims 1 to 5, wherein a reverse osmosis membrane is further arranged in the tank body, and the reverse osmosis membrane separates the air outlet hole and the high-pressure gas unit communicating part on the tank body from the water outlet hole and the water inlet hole of the tank body.
7. The water storage tank for ultrapure water for laboratory use according to claim 1 wherein the high pressure gas unit employs a high pressure nitrogen gas cylinder, the unit nitrogen gas cylinder communicating with the pressure reduction valve through a filter tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921457561.9U CN211004691U (en) | 2019-09-03 | 2019-09-03 | Water storage tank for ultrapure water machine special for laboratory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921457561.9U CN211004691U (en) | 2019-09-03 | 2019-09-03 | Water storage tank for ultrapure water machine special for laboratory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211004691U true CN211004691U (en) | 2020-07-14 |
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ID=71469651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921457561.9U Expired - Fee Related CN211004691U (en) | 2019-09-03 | 2019-09-03 | Water storage tank for ultrapure water machine special for laboratory |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211004691U (en) |
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2019
- 2019-09-03 CN CN201921457561.9U patent/CN211004691U/en not_active Expired - Fee Related
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Granted publication date: 20200714 |