CN117345639A - Water source switching system for cooling vacuum pump and operation method thereof - Google Patents
Water source switching system for cooling vacuum pump and operation method thereof Download PDFInfo
- Publication number
- CN117345639A CN117345639A CN202311170992.8A CN202311170992A CN117345639A CN 117345639 A CN117345639 A CN 117345639A CN 202311170992 A CN202311170992 A CN 202311170992A CN 117345639 A CN117345639 A CN 117345639A
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- Prior art keywords
- water
- cooling
- electric valve
- vacuum pump
- supply pipe
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 277
- 238000001816 cooling Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000000498 cooling water Substances 0.000 claims abstract description 58
- 238000011010 flushing procedure Methods 0.000 claims abstract description 31
- 239000012530 fluid Substances 0.000 claims description 27
- 238000011001 backwashing Methods 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 14
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 6
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
- F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
- F04C19/004—Details concerning the operating liquid, e.g. nature, separation, cooling, cleaning, control of the supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/082—Pipe-line systems for liquids or viscous products for cold fluids, e.g. liquefied gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention relates to the technical field of vacuum pump cooling, and discloses a water source switching system for vacuum pump cooling and an operation method thereof, wherein on the premise of using a single heat exchanger, the invention can realize switching of different water sources to cool a water ring vacuum pump without increasing equipment investment and equipment occupied area; according to the invention, the water source can be switched according to actual use conditions, the circulating water is used for cooling the water ring vacuum pump on the premise of meeting the cooling effect, so that the energy consumption and the cost can be reduced, and when the circulating water is insufficient for cooling the water ring vacuum pump, the cooling water is used for cooling the water ring vacuum pump, so that the cooling effect is ensured; the invention is provided with the back flush water supply pipe and the back flush water return pipe, can flush the related pipelines before the circulating water is switched to the cooling water, has a flushing direction opposite to the flow direction of the medium during working, and has good flushing effect and prevents the water quality of the cooling water from being polluted.
Description
Technical Field
The invention relates to the technical field of vacuum pump cooling, in particular to a water source switching system for vacuum pump cooling.
Background
The liquid ring vacuum pump is characterized in that a rotor with multiple blades is eccentrically arranged in a pump shell. When the rotor rotates, it throws working fluid towards the pump housing and forms a liquid ring concentric with the pump housing, the liquid ring and the rotor blades forming a rotary positive displacement vacuum pump of cyclically varying volume. When the working liquid of the liquid ring vacuum pump is water, the liquid ring vacuum pump is called a water ring vacuum pump. The common water ring vacuum pump adopts open circulating water as working fluid cooling water. The temperature of the open circulating water is generally 22 ℃ (average annual value) to 33 (summer) DEG C according to different seasons. Because the working fluid in the water ring type vacuum pump is water, and the temperature of the working fluid cooling water is correspondingly increased in summer, the working fluid cannot be cooled well, and the water is easily gasified at the lower pressure position in the pump body, so that the vacuumizing output of the vacuum pump is reduced.
Disclosure of Invention
The invention aims to solve the technical problem that the water source switching system for vacuum pump cooling can switch different water sources to cool vacuum, has a good cooling effect, has a back flushing function and prevents water sources with poor water quality from polluting water sources with good water quality.
In order to achieve the above purpose, the invention provides a water source switching system for cooling a vacuum pump, which comprises a circulating water supply pipe, a circulating water return pipe, a cooling water supply pipe, a cooling water return pipe, a back flushing water supply pipe, a back flushing return pipe, a heat exchanger and a water ring vacuum pump set, wherein the heat exchanger is provided with a first water inlet, a first water outlet, a second water inlet and a second water outlet, the circulating water supply pipe is respectively connected with a water outlet end of the cooling water supply pipe and a water inlet end bypass of the back flushing return pipe, the water outlet end of the circulating water supply pipe is connected with the first water inlet, the water inlet end of the circulating water supply pipe is provided with a first electric valve, the cooling water supply pipe is provided with a second electric valve, the back flushing return pipe is provided with a third electric valve, the circulating water return pipe is respectively connected with the water inlet end of the cooling water return pipe and the water outlet end bypass of the back flushing water supply pipe, the water inlet end of the circulating water return pipe is connected with the second water outlet, the water outlet end bypass of the circulating water return pipe is provided with a fourth electric valve, the fifth electric valve is provided with a water inlet, the working fluid is connected with a working fluid pump, and the working fluid is connected with a working fluid pump.
As a preferable scheme of the invention, a plurality of heat exchangers are arranged in parallel, and each heat exchanger is connected with one water ring vacuum pump set.
As a preferable scheme of the invention, the water outlet end of the circulating water supply pipe is connected with a plurality of first branch pipes, the first branch pipes are connected with the first water inlets of the heat exchangers in a one-to-one correspondence manner, the water inlet end of the circulating water return pipe is connected with a plurality of second branch pipes, and the second branch pipes are respectively connected with the first water outlets of the heat exchangers in a one-to-one correspondence manner.
As a preferable scheme of the invention, the first branch pipe is provided with a first valve, and the second branch pipe is provided with a second valve.
As a preferable scheme of the invention, the cooling water supply pipe is provided with a first check valve, the cooling water return pipe is provided with a second check valve, and the backwashing water supply pipe is provided with a third check valve.
As a preferable scheme of the invention, the backwash water return pipe is connected with a sampling pipe in a bypass way.
Meanwhile, the invention also provides an operation method of the water source switching system for cooling the vacuum pump, which comprises the following steps:
s1, when the water ring vacuum pump set is started, circulating water is used for cooling the water ring vacuum pump set, at the moment, the first electric valve and the fourth electric valve are opened, and the second electric valve, the third electric valve, the fifth electric valve and the sixth electric valve are closed;
s2: when the water ring vacuum pump set is required to be cooled by switching to cooling water, the first electric valve and the fourth electric valve are closed, then the third electric valve and the sixth electric valve are opened, the pipeline is backwashed by flushing water, and when the water quality of the backwashed water meets the requirement, the third electric valve and the sixth electric valve are closed, and the second electric valve and the fifth electric valve are opened;
s3: when the circulating water is needed to be switched back to cool the water ring vacuum pump set, the second electric valve and the fifth electric valve are closed, and the first electric valve and the fourth electric valve are opened.
Compared with the prior art, the water source switching system for cooling the vacuum pump and the use method thereof have the beneficial effects that: on the premise of using a single heat exchanger, the invention can realize switching different water sources to cool the water ring vacuum pump, does not increase equipment investment and equipment occupied area; according to the invention, the water source can be switched according to actual use conditions, the circulating water is used for cooling the water ring vacuum pump on the premise of meeting the cooling effect, so that the energy consumption and the cost can be reduced, and when the circulating water is insufficient for cooling the water ring vacuum pump, the cooling water is used for cooling the water ring vacuum pump, so that the cooling effect is ensured; the invention is provided with the back flush water supply pipe and the back flush water return pipe, can flush the related pipelines before the circulating water is switched to the cooling water, has a flushing direction opposite to the flow direction of the medium during working, and has good flushing effect and prevents the water quality of the cooling water from being polluted.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
in the figure, 1, a circulating water supply pipe; 11. a first electrically operated valve; 2. a circulating water return pipe; 21. a fourth electrically operated valve; 3. a cooling water supply pipe; 31. a second electrically operated valve; 32. a first check valve; 4. a cooling water return pipe; 41. a fifth electrically operated valve; 42. a second check valve; 5. a backwash water supply pipe; 51. a sixth electrically operated valve; 52. a third check valve; 6. back flushing the water return pipe; 61. a third electrically operated valve; 62. a sampling tube; 7. a heat exchanger; 71. a first water inlet; 72. a first water outlet; 73. a first branch pipe; 731. a first valve; 74. a second branch pipe; 741. a second valve; 8. and a working fluid circulation pipeline.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the present invention as indicated by the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention, and furthermore, the terms "first," "second," "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, a water source switching system for cooling a vacuum pump according to a preferred embodiment of the present invention includes a circulating water supply pipe 1, a circulating water return pipe 2, a cooling water supply pipe 3, a cooling water return pipe 4, a backwash water supply pipe 5, a backwash water return pipe 6, a heat exchanger 7, and a water ring vacuum pump unit, wherein the heat exchanger 7 is an existing heat exchanger 7 capable of realizing a water-water heat exchange function, such as a plate heat exchanger 7, the specific structure of which is not described in detail herein, the heat exchanger 7 is provided with a first water inlet 71, a first water outlet 72, a second water inlet and a second water outlet, the working fluid in the working fluid circulation pipe 8 enters the heat exchanger 7 through the second water inlet, at this time, the first water inlet 71 is filled with water having a lower temperature than the working fluid, and cooling of the working fluid can be realized through heat exchange, the circulating water supply pipe 1 is respectively connected with the water outlet end of the cooling water supply pipe 3 and the water inlet end bypass of the back flushing water return pipe 6, the water outlet end of the circulating water supply pipe 1 is connected with the first water inlet 71, the water inlet end of the circulating water supply pipe 1 is provided with a first electric valve 11, the cooling water supply pipe 3 is provided with a second electric valve 31, the back flushing water return pipe 6 is provided with a third electric valve 61, the circulating water return pipe 2 is respectively connected with the water inlet end of the cooling water return pipe 4 and the water outlet end bypass of the back flushing water supply pipe 5, the water inlet end of the circulating water return pipe 2 is connected with the second water outlet, the water outlet end of the circulating water return pipe 2 is provided with a fourth electric valve 21, the cooling water return pipe 4 is provided with a fifth electric valve 41, the back flushing water supply pipe 5 is provided with a sixth electric valve 51, the water ring vacuum pump is provided with a working fluid circulation pipeline 8, the working fluid circulation pipeline 8 is provided with a working fluid outlet and a working fluid return port, the working fluid outlet is connected with the second water inlet, the working fluid return port is connected with the second water outlet, the water inlet end of the circulating water supply pipe 1 and the water outlet end of the circulating water return pipe 2 are respectively connected with a circulating water source, the water inlet end of the cooling water supply pipe 3 and the water outlet end of the cooling water return pipe 4 are respectively connected with a cooling water source, the water inlet end of the backwash water supply pipe 5 is connected with a flushing water source, the water outlet end of the backwash water return pipe 6 is connected with a circulating water source (open circulating water), the cooling water source is refrigerating chilled water provided by a large refrigerating station arranged in a power plant, the temperature of the refrigerating chilled water is 6-7 ℃, and when the refrigerating chilled water is used for cooling working fluid of the water loop vacuum pump, the refrigerating effect of the water loop vacuum pump is better due to the lower temperature, the output of the unit is increased, and the heat economy of the unit is improved; in this embodiment, the quality of the washing water (demineralized water) is better than that of the cooling water, which is better than that of the circulating water.
The operation method of the system comprises the following steps:
and S1, when the water ring vacuum pump set is started, circulating water is used for cooling the water ring vacuum pump set, at the moment, the first electric valve 11 and the fourth electric valve 21 are opened, the second electric valve 31, the third electric valve 61, the fifth electric valve 41 and the sixth electric valve 51 are closed, at the moment, the circulating water supply pipe 1 conveys the circulating water to the first water inlet 71 and enters the heat exchanger 7, the working fluid is cooled and then is discharged from the first water outlet 72, and then the circulating water is returned through the circulating water return pipe 2 to realize circulation.
S2: when the cooling water needs to be switched to cool the water ring vacuum pump set (i.e. when the cooling effect of the circulating water on the water ring vacuum pump set is insufficient), the quality of the cooling water is better than that of the circulating water, so if the cooling water is directly switched, the residual water in the heat exchanger 7 and related pipelines can enter the cooling water source to pollute the cooling water source, and therefore the back flushing treatment is needed, specifically, the second electric valve 31 and the fifth electric valve 41 are closed, the third electric valve 61 and the sixth electric valve 51 are opened, at this time, the flushing water sequentially passes through the back flushing water supply pipe 5, the first water outlet 72, the first water inlet 71 and the back flushing return pipe 6, and finally, the residual water in the heat exchanger 7 and the corresponding pipelines can be flushed away into the circulating water source by discharging the flushing water, when the quality of the water discharged by back flushing meets the requirements, the third electric valve 61 and the sixth electric valve 51 are closed, the second electric valve 31 and the fifth electric valve 41 are opened, and the cooling water supply pipe 3 pieces of cooling water sequentially passes through the first water outlet 71 and the first water outlet 72, at this time, the vacuum effect of the cooling water pump is realized, and the cooling water is better in the cooling water cooling effect of the circulating water pump is realized by the circulating water through the cooling water ring 4.
S3: when the circulating water is needed to be used for cooling the water ring vacuum pump set, the second electric valve 31 and the fifth electric valve 41 are closed, and the first electric valve 11 and the fourth electric valve 21 are opened, so that the water source can be directly switched because the quality of the cooling water is better than that of the circulating water.
According to the invention, on the premise of using a single heat exchanger 7, the water ring vacuum pump can be cooled by switching different water sources (circulating water and cooling water), so that the equipment investment is not increased, and the equipment floor area is not increased; according to the invention, the water source can be switched according to actual use conditions, the circulating water is used for cooling the water ring vacuum pump on the premise of meeting the cooling effect, so that the energy consumption and the cost can be reduced, and when the circulating water is insufficient for cooling the water ring vacuum pump, the cooling water is used for cooling the water ring vacuum pump, so that the cooling effect is ensured; the invention is provided with the back flush water supply pipe 5 and the back flush water return pipe 6, and can flush the related pipelines before the circulating water is switched to the cooling water, the flushing direction is opposite to the flow direction of the medium during working, the flushing effect is good, and the water quality of the cooling water is prevented from being polluted.
Illustratively, a plurality of heat exchangers 7 are provided, and a plurality of heat exchangers 7 are arranged in parallel, and each heat exchanger 7 is connected with one water ring vacuum pump set, that is, the system can be simultaneously applied to cooling of a plurality of water ring vacuum pump sets.
Illustratively, the water outlet end of the circulating water supply pipe 1 is connected to a plurality of first branch pipes 73, a plurality of first branch pipes 73 are connected to a plurality of first water inlets 71 of the heat exchangers 7 in a one-to-one correspondence manner, the circulating water supply pipe 1 or the cooling water supply pipe 3 can supply water to the plurality of heat exchangers 7 at the same time, the water inlet end of the circulating water return pipe 2 is connected to a plurality of second branch pipes 74, a plurality of second branch pipes 74 are respectively connected to the plurality of first water outlets 72 of the heat exchangers 7 in a one-to-one correspondence manner, water is concentrated, and the backwash water supply pipe 5 can backwash pipes of the plurality of heat exchangers 7 at the same time, and then the rinsed water is concentrated and collected through the backwash water return pipe 6.
Illustratively, the first branch pipe 73 is provided with a first valve 731, the second branch pipe 74 is provided with a second valve 741, the first valve 731 can control the on/off of the first branch pipe 73, and the second valve 741 can control the on/off of the second branch pipe 74, thereby realizing the control of the input of the first water inlet 71 and the output of the first water outlet 72 of each heat exchanger 7, so as to perform maintenance and repair on the single heat exchanger 7 and the water ring pump set.
Illustratively, the cooling water supply pipe 3 is provided with a first check valve 32, the cooling water return pipe 4 is provided with a second check valve 42, the back flushing water supply pipe 5 is provided with a third check valve 52, it is understood that the flowing direction of the first check valve 32 is the direction from the second electric valve 31 to the first water inlet 71, the flowing direction of the second check valve 42 is the direction from the first water outlet 72 to the fifth electric valve 41, and the flowing direction of the third check valve 52 is the direction from the sixth electric valve 51 to the first water outlet 72, so as to prevent the water from flowing backwards to pollute the water source of the cooling water pipeline or the quality of the flushing water source.
Illustratively, the backwash water return pipe 6 is connected with a sampling pipe 62 in a bypass manner, and the quality of the water discharged to the circulating water source after the flushing pipe of the flushing water source is sampled and detected through the sampling pipe 62 so as to confirm whether the flushing has reached the requirement.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (7)
1. A water source switching system for vacuum pump cooling, characterized by: the circulating water pump comprises a circulating water supply pipe, a circulating water return pipe, a cooling water supply pipe, a cooling water return pipe, a backwashing water supply pipe, a backwashing water return pipe, a heat exchanger and a water ring vacuum pump set, wherein the heat exchanger is provided with a first water inlet, a first water outlet, a second water inlet and a second water outlet, the circulating water supply pipe is respectively connected with the water outlet end of the cooling water supply pipe and the water inlet end bypass of the backwashing water return pipe, the water outlet end of the circulating water supply pipe is connected with the first water inlet, the water inlet end of the circulating water supply pipe is provided with a first electric valve, the cooling water supply pipe is provided with a second electric valve, the backwashing water return pipe is provided with a third electric valve, the circulating water return pipe is respectively connected with the water inlet end of the cooling water return pipe and the water outlet end bypass of the backwashing water supply pipe, the water outlet end of the circulating water return pipe is provided with a fourth electric valve, the cooling water return pipe is provided with a fifth electric valve, the backwashing water supply pipe is provided with a sixth electric valve, the backwashing water return pipe is provided with a working fluid circulation fluid, and a working fluid inlet is connected with a second water outlet, and a working fluid return pipe is connected with the working fluid vacuum pump.
2. The water source switching system for vacuum pump cooling of claim 1, wherein: the heat exchangers are arranged in parallel, and each heat exchanger is connected with one water ring vacuum pump set.
3. The water source switching system for vacuum pump cooling of claim 2, wherein: the water outlet end of the circulating water supply pipe is connected with a plurality of first branch pipes, a plurality of first branch pipes are connected with a plurality of first water inlets of the heat exchangers in a one-to-one correspondence manner, the water inlet end of the circulating water return pipe is connected with a plurality of second branch pipes, and a plurality of second branch pipes are respectively connected with a plurality of first water outlets of the heat exchangers in a one-to-one correspondence manner.
4. A water source switching system for vacuum pump cooling as claimed in claim 3, wherein: the first branch pipe is provided with a first valve, and the second branch pipe is provided with a second valve.
5. The water source switching system for vacuum pump cooling of claim 1, wherein: the cooling water supply pipe is provided with a first check valve, the cooling water return pipe is provided with a second check valve, and the backwashing water supply pipe is provided with a third check valve.
6. The water source switching system for vacuum pump cooling of claim 1, wherein: and the backwash water return pipe is connected with a sampling pipe in a bypass mode.
7. A method of operating the water source switching system for vacuum pump cooling as set forth in claim 1, wherein: the method comprises the following steps:
s1, when the water ring vacuum pump set is started, circulating water is used for cooling the water ring vacuum pump set, at the moment, the first electric valve and the fourth electric valve are opened, and the second electric valve, the third electric valve, the fifth electric valve and the sixth electric valve are closed;
s2: when the water ring vacuum pump set is required to be cooled by switching to cooling water, the first electric valve and the fourth electric valve are closed, then the third electric valve and the sixth electric valve are opened, the pipeline is backwashed by flushing water, and when the water quality of the backwashed water meets the requirement, the third electric valve and the sixth electric valve are closed, and the second electric valve and the fifth electric valve are opened;
s3: when the circulating water is needed to be switched back to cool the water ring vacuum pump set, the second electric valve and the fifth electric valve are closed, and the first electric valve and the fourth electric valve are opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311170992.8A CN117345639A (en) | 2023-09-11 | 2023-09-11 | Water source switching system for cooling vacuum pump and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311170992.8A CN117345639A (en) | 2023-09-11 | 2023-09-11 | Water source switching system for cooling vacuum pump and operation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117345639A true CN117345639A (en) | 2024-01-05 |
Family
ID=89354785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311170992.8A Pending CN117345639A (en) | 2023-09-11 | 2023-09-11 | Water source switching system for cooling vacuum pump and operation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117345639A (en) |
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2023
- 2023-09-11 CN CN202311170992.8A patent/CN117345639A/en active Pending
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