CN113237255A - Refrigerant is with purifying appearance - Google Patents
Refrigerant is with purifying appearance Download PDFInfo
- Publication number
- CN113237255A CN113237255A CN202110519704.XA CN202110519704A CN113237255A CN 113237255 A CN113237255 A CN 113237255A CN 202110519704 A CN202110519704 A CN 202110519704A CN 113237255 A CN113237255 A CN 113237255A
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- Prior art keywords
- filter screen
- refrigerant
- connecting pipe
- impurities
- compressor
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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
- 239000003507 refrigerant Substances 0.000 title claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 46
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 238000002360 preparation method Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 abstract description 37
- 238000000746 purification Methods 0.000 abstract description 14
- 238000007599 discharging Methods 0.000 abstract description 11
- 238000004804 winding Methods 0.000 abstract description 7
- 238000004140 cleaning Methods 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 19
- 239000003921 oil Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 8
- 230000003749 cleanliness Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 2
- 101100396755 Spinacia oleracea AHRI gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a purification instrument for a refrigerant, which relates to the field of refrigerant recovery and comprises a compressor, a dryer, an oil separator, a heat exchanger, a temperature control switch, an electromagnetic valve and two purifiers, wherein a discharging assembly and a filter screen are arranged in each purifier, and a first connecting pipe is connected between the oil separator and the compressor. According to the invention, through the arrangement of the discharging assembly, when impurities on the filter screen need to be cleaned, a user can start the motor, the motor works to drive the winding wheel to rotate, and further the pull rope is loosened, at the moment, the filter screen rotates downwards through the movable shaft, after the filter screen rotates to be in contact with the material guide net, the filter screen can vibrate to a certain degree, the impurities on the filter screen can slide to the material guide net, then the user takes the sealing plug out of the discharging port, and the impurities can be discharged through the discharging port, so that the impurities on the filter screen can be quickly cleaned, the cleaning efficiency of the impurities is improved, and meanwhile, the impurities are prevented from being blocked on the filter screen.
Description
Technical Field
The invention relates to the field of refrigerant recovery, in particular to a purifier for refrigerant.
Background
Most of lubricating oil and impurities in the recovered refrigerant are basically filtered out simply by the refrigerant purification equipment on the market at present, but oil, moisture, particulate matters and the like still exist in the purified refrigerant, and the purified refrigerant cannot meet the Standard requirements of AHRI _ Standard _700_2019 on the refrigerant; therefore, the purifier is arranged to filter the particles in the oil water.
Although the existing refrigerant purification equipment is provided with the purifier for filtering impurities, the filtered impurities are accumulated in the purifier, and the impurities are difficult to be quickly taken out of the purifier, so that the impurity cleaning efficiency is reduced, and if the impurities are not timely cleaned out of the purifier, the purifier can be blocked, so that the refrigerant purification efficiency of the purifier is influenced; meanwhile, a compressor on the purifier is low in suction pressure or high in exhaust temperature or liquid carrying during operation, so that the service life of the compressor is further influenced, one device on the market can only purify one refrigerant and cannot be suitable for multiple refrigerants, the device is high in failure rate and short in service life, optimized system design and ideal and efficient purification results are not provided, the purification efficiency is low, the refrigerant circulation flow of the system cannot be adjusted according to the cleaning degree of the recovered refrigerant, and the suction pressure of the compressor cannot be adjusted according to requirements.
Disclosure of Invention
Based on this, the invention aims to provide a refrigerant purifier to solve the technical problems that impurities in the purifier are difficult to rapidly clear and the service life of a compressor is influenced.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a refrigerant is with purifying apparatus, includes compressor, desicator, oil separator, heat exchanger, temperature detect switch, solenoid valve and two purifiers, two the inside of clarifier all is provided with ejection of compact subassembly and filter screen, be connected with first connecting pipe between oil separator and the compressor, one side of heat exchanger is connected with third communicating pipe.
Through adopting above-mentioned technical scheme, be provided with the heat exchanger, be convenient for carry out the heat transfer to high temperature liquid and the low pressure liquid that purifies the circulation and guarantee the overheated gaseous state that gets into in the oil separator to guaranteed purifying effect, be provided with the filter screen, can filter liquid, avoid being mingled with impurity in the liquid, be provided with ejection of compact subassembly, the impurity after being convenient for to filter can be fast from the inside discharge of clarifier.
Furthermore, the bottom of the oil separator is connected with a second connecting pipe extending into the compressor, a first communicating pipe is connected between the compressor and the dryer, and a second communicating pipe is connected between the dryer and one purifier.
Through adopting above-mentioned technical scheme, be provided with the second and be connected in pipe, be convenient for carry the material through the desicator drying to the clarifier inside.
Furthermore, a first material conveying pipe is connected between the two purifiers, a second material conveying pipe is connected between the purifier and the heat exchanger, and valves are mounted on the outer surfaces of the first material conveying pipe and the second material conveying pipe.
Through adopting above-mentioned technical scheme, be provided with first conveying pipeline, be convenient for carry the material, be provided with the valve, be convenient for close first conveying pipeline and second conveying pipeline, prevent that the material from flowing through first conveying pipeline and second conveying pipeline at will.
Further, ejection of compact subassembly is including loose axle, motor, striker plate, discharge gate and guide net, the filter screen cup joints in the surface of loose axle, the motor is installed in one side of clarifier, the output of motor is connected with the reel, the surface of reel is connected with the stay cord, the bottom of stay cord is connected with the top of filter screen, two the aperture of filter screen is inequality.
Through adopting above-mentioned technical scheme, the filter screen can filter the liquid after retrieving to can improve the purifying effect who purifies the appearance, be provided with the reel, the reel can roll or loosen the stay cord when rotating, and then can drive the filter screen and rotate.
Further, the bottom of striker plate contacts with the filter screen, the filter screen rotates through loose axle and clarifier and is connected, the striker plate adopts stainless steel material to make and forms.
Through adopting above-mentioned technical scheme, the striker plate can prevent that impurity from removing to one side of loose axle, and the filter screen of being convenient for simultaneously rotates, rotates to the back to a certain extent when the filter screen, makes things convenient for the impurity on the filter screen to slide.
Further, the inside of discharge gate is provided with the sealing plug, one side of sealing plug is fixed with the pull ring, the sealing plug adopts rubber materials preparation to form.
Through adopting above-mentioned technical scheme, convenient to use person fills in the sealing plug to the inside of discharge gate or takes out the sealing plug from the discharge gate to prevent that liquid from flowing out through the discharge gate, and then improved the leakproofness of clarifier
Furthermore, the material guide net is positioned under the filter screen, and one side of the material guide net inclines downwards along the direction of the discharge port.
Through adopting above-mentioned technical scheme, can make impurity drop to the guide net through the filter screen on, impurity can slide in to the inside of discharge gate through the guide net again to make things convenient for impurity to discharge through the discharge gate.
Further, the bottom of heat exchanger is connected with the third conveying pipeline, be connected with fourth communicating pipe between third communicating pipe and the third conveying pipeline, be connected with the third connecting pipe between air-cooled condenser and the third communicating pipe, be connected with the fourth connecting pipe between third connecting pipe and the heat exchanger.
Through adopting above-mentioned technical scheme, the air-cooled condenser can condense the refrigerant of retrieving, and the heat exchanger can guarantee to get into the overheated gaseous state in the oil separator with the heat transfer of the high-temperature liquid that the air-cooled condenser condensation came out and the low-pressure liquid of purification cycle to purifying effect has been guaranteed.
Further, the electromagnetic valve is installed on the outer surfaces of the fourth connecting pipe, the third connecting pipe and the fourth communicating pipe, and the temperature control switch is installed on one side of the first connecting pipe.
Through adopting above-mentioned technical scheme, through temperature detect switch and solenoid valve cooperation, can guarantee that compressor exhaust temperature can not be too high, the compressor just can adapt to various refrigerant and also can not move abominable condition like this, also can adapt to the refrigerant that can adjust the circulation volume according to the cleanliness of difference.
In summary, the invention mainly has the following beneficial effects:
1. according to the invention, through the arrangement of the discharging assembly, when impurities on the filter screen need to be cleaned, a user can start the motor, the motor works to drive the winding wheel to rotate, and further the pull rope is loosened, at the moment, the filter screen rotates downwards through the movable shaft, after the filter screen rotates to be in contact with the material guide net, the filter screen can vibrate to a certain degree, the impurities on the filter screen can slide to the material guide net, then the user takes the sealing plug out of the material outlet, and the impurities can be discharged through the material outlet, so that the impurities on the filter screen can be quickly cleaned, the cleaning efficiency of the impurities is improved, meanwhile, the impurities are prevented from being blocked on the filter screen, and the filter screen can be reset after the cleaning is finished.
2. The invention reasonably arranges two purifiers, the position selection of the purifiers ensures the oil separation effect, the heat exchanger exchanges heat between the high-temperature liquid from the air-cooled condenser and the low-pressure liquid of the purification cycle to ensure the overheat gas state entering the purifiers, thereby ensuring the purification effect, and the temperature control switch is matched with the electromagnetic valve to ensure that the exhaust temperature of the compressor is not overhigh, so that the compressor can adapt to various refrigerants and can not run under severe conditions, and can also adapt to the adjustment of circulation amount according to the refrigerants with different cleanliness, thereby ensuring the relaxation of the operation working conditions of the compressor, high reliability and wide application range, being used for various refrigerants, ensuring the purification efficiency and quality, and the purified refrigerants can reach the standard of new refrigerants.
Drawings
FIG. 1 is a schematic front view of the compressor of the present invention;
FIG. 2 is a schematic perspective view of a filter screen according to the present invention;
FIG. 3 is an enlarged view of the invention at A in FIG. 1;
fig. 4 is an enlarged view of the present invention at B in fig. 1.
In the figure: 1. a compressor; 2. a dryer; 3. a purifier; 4. an oil separator; 5. a heat exchanger; 6. a discharge assembly; 601. a material guiding net; 602. a motor; 603. a winding wheel; 604. pulling a rope; 605. a striker plate; 606. a movable shaft; 607. a sealing plug; 608. a discharge port; 7. an air-cooled condenser; 8. a first connecting pipe; 9. a second connecting pipe; 10. a first communication pipe; 11. a second communicating pipe; 12. a first feed delivery pipe; 13. a third connecting pipe; 14. an electromagnetic valve; 15. a fourth connecting pipe; 16. a second delivery pipe; 17. a third communicating pipe; 18. a third delivery pipe; 19. a fourth communicating pipe; 20. a temperature control switch; 21. and (4) a filter screen.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The following describes an embodiment of the present invention based on its overall structure.
A refrigerant purifier, as shown in FIGS. 1-3, comprises a compressor 1, a dryer 2, an oil separator 4, a heat exchanger 5, a temperature controlled switch 20, a solenoid valve 14, two purifiers 3, and a heat exchanger 5 for exchanging heat between high temperature liquid and low pressure liquid circulating for purification to ensure the overheat gas state entering the oil separator 4, thereby ensuring the purification effect, wherein the two purifiers 3 are internally provided with a discharge assembly 6 and a filter screen 21, the filter screen 21 can filter the liquid to avoid impurities mixed in the liquid, the discharge assembly 6 is provided for discharging the filtered impurities from the interior of the purifier 3, a first connecting pipe 8 is connected between the oil separator 4 and the compressor 1, one side of the heat exchanger 5 is connected with a third communicating pipe 17, the bottom of the heat exchanger 5 is connected with a third communicating pipe 18, a fourth communicating pipe 19 is connected between the third communicating pipe 17 and the third communicating pipe 18, be connected with third connecting pipe 13 between air-cooled condenser 7 and the third communicating pipe 17, be connected with fourth connecting pipe 15 between third connecting pipe 13 and the heat exchanger 5, air-cooled condenser 7 can condense the refrigerant of retrieving, solenoid valve 14 is installed in fourth connecting pipe 15, the surface of third connecting pipe 13 and fourth communicating pipe 19, temperature detect switch 20 is installed in one side of first connecting pipe 8, through temperature detect switch 20 and the cooperation of solenoid valve 14, can guarantee that compressor 1 exhaust temperature can not be too high, compressor 1 just can adapt to various refrigerants and also can not move abominable condition like this, also can adapt to the refrigerant that can be according to the cleanliness of difference and adjust the circulation volume.
Referring to fig. 1, the bottom of the oil separator 4 is connected with a second connecting pipe 9 extending to the inside of the compressor 1, a first communicating pipe 10 is connected between the compressor 1 and the dryer 2, a second communicating pipe 11 is connected between the dryer 2 and one purifier 3, so that the material dried by the dryer 2 can be conveyed to the inside of the purifier 3, a first material conveying pipe 12 is connected between the two purifiers 3, a second material conveying pipe 16 is connected between the other purifier 3 and the heat exchanger 5, and valves are mounted on the outer surfaces of the first material conveying pipe 12 and the second material conveying pipe 16, so that the first material conveying pipe 12 and the second material conveying pipe 16 can be closed, and the material can be prevented from flowing through the first material conveying pipe 12 and the second material conveying pipe 16 at will.
Referring to fig. 1-4, the discharging assembly 6 includes a movable shaft 606, a motor 602, a material baffle 605, a discharging port 608 and a material guiding net 601, the filter screen 21 is sleeved on the outer surface of the movable shaft 606, the material guiding net 601 is located under the filter screen 21, one side of the material guiding net 601 inclines downwards along the direction of the discharging port 608, so that the impurities can fall onto the material guiding net 601 through the filter screen 21, the impurities can slide into the discharging port 608 through the material guiding net 601, thereby facilitating the discharge of the impurities through the discharging port 608, the motor 602 is installed on one side of the purifier 3, the output end of the motor 602 is connected with a winding wheel 603, the pulling rope 604 can be wound or loosened when the winding wheel 603 rotates, thereby driving the filter screen 21 to rotate, the outer surface of the winding wheel 603 is connected with a pulling rope 604, the bottom end of the pulling rope 604 is connected with the top of the filter screen 21, the apertures of the two filter screens 21 are different, the bottom of the material baffle 605 is in contact with the filter screen 21, filter screen 21 rotates through loose axle 606 and clarifier 3 to be connected, striker plate 605 adopts the stainless steel material preparation to form, striker plate 605 can prevent that impurity from removing to one side of loose axle 606, the filter screen 21 of being convenient for simultaneously rotates, after filter screen 21 rotates to a certain extent, make things convenient for the impurity on the filter screen 21 to slide, the inside of discharge gate 608 is provided with sealing plug 607, one side of sealing plug 607 is fixed with the pull ring, sealing plug 607 adopts the rubber materials preparation to form, the person of facilitating the use fills in sealing plug 607 to the inside of discharge gate 608 or takes out sealing plug 607 from discharge gate 608, in order to prevent that the liquid from flowing through discharge gate 608, and then improved clarifier 3's leakproofness.
The working principle is as follows: firstly, because two purifiers 3 are reasonably configured, the position selection of the purifiers 3 ensures the oil separation effect, the heat exchanger 5 exchanges heat between high-temperature liquid discharged from the air-cooled condenser 7 and low-pressure liquid of purification circulation to ensure the overheat gas state entering the purifiers 3, thereby ensuring the purification effect, the temperature control switch 20 is matched with the electromagnetic valve 14, so that the exhaust temperature of the compressor 1 can be ensured not to be overhigh, the compressor 1 can adapt to various refrigerants and can not run severe conditions, the circulation amount can be adjusted according to the refrigerants with different cleanliness, the filter screen 21 in the purifiers 3 can filter the liquid, the filtered impurities can be accumulated on the filter screen 21, when the impurities on the filter screen 21 need to be cleaned, a user can start the motor 602, the motor 602 works to drive the winding wheel 603 to rotate, and further loosen the pull rope 604, at this moment, the filter screen 21 rotates downwards through the movable shaft 606, after the filter screen 21 rotates to be in contact with the material guide net 601, the filter screen 21 vibrates to a certain degree, impurities on the filter screen 21 slide to the material guide net 601, then a user takes out the sealing plug 607 from the discharge hole 608, the impurities are discharged through the discharge hole 608, and the filter screen 21 is reset after cleaning.
Although embodiments of the present invention have been shown and described, it is intended that the present invention should not be limited thereto, that the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples, and that modifications, substitutions, variations or the like, which are not inventive and may be made by those skilled in the art without departing from the principle and spirit of the present invention and without departing from the scope of the claims.
Claims (9)
1. The refrigerant purifier comprises a compressor (1), a dryer (2), an oil separator (4), a heat exchanger (5), a temperature control switch (20), an electromagnetic valve (14) and two purifiers (3), and is characterized in that: two the inside of clarifier (3) all is provided with ejection of compact subassembly (6) and filter screen (21), be connected with first connecting pipe (8) between oil separator (4) and compressor (1), one side of heat exchanger (5) is connected with third communicating pipe (17).
2. A refrigerant purifier as defined in claim 1, wherein: the bottom of oil separator (4) is connected with second connecting pipe (9) that extend to inside compressor (1), be connected with first communicating pipe (10) between compressor (1) and desicator (2), be connected with second communicating pipe (11) between desicator (2) and a clarifier (3).
3. A refrigerant purifier as defined in claim 1, wherein: two be connected with first conveying pipeline (12) between clarifier (3), another be connected with second conveying pipeline (16) between clarifier (3) and heat exchanger (5), the surface mounting of first conveying pipeline (12) and second conveying pipeline (16) has the valve.
4. A refrigerant purifier according to claim 2, wherein: ejection of compact subassembly (6) is including loose axle (606), motor (602), striker plate (605), discharge gate (608) and guide net (601), filter screen (21) are cup jointed in the surface of loose axle (606), install in one side of clarifier (3) motor (602), the output of motor (602) is connected with reel (603), the surface of reel (603) is connected with stay cord (604), the bottom of stay cord (604) is connected with the top of filter screen (21), two the aperture of filter screen (21) is inequality.
5. The refrigerant purifier according to claim 4, wherein: the bottom of the material baffle plate (605) is in contact with the filter screen (21), the filter screen (21) is rotatably connected with the purifier (3) through the movable shaft (606), and the material baffle plate (605) is made of stainless steel materials.
6. The refrigerant purifier according to claim 4, wherein: the inside of discharge gate (608) is provided with sealing plug (607), one side of sealing plug (607) is fixed with the pull ring, sealing plug (607) adopts rubber materials preparation to form.
7. The refrigerant purifier according to claim 4, wherein: the material guide net (601) is located right below the filter screen (21), and one side of the material guide net (601) inclines downwards along the direction of the discharge hole (608).
8. The refrigerant purifier according to claim 6, wherein: the bottom of heat exchanger (5) is connected with third conveying pipeline (18), be connected with fourth communicating pipe (19) between third communicating pipe (17) and third conveying pipeline (18), be connected with third connecting pipe (13) between air-cooled condenser (7) and third communicating pipe (17), be connected with fourth connecting pipe (15) between third connecting pipe (13) and heat exchanger (5).
9. The refrigerant purifier according to claim 8, wherein: the electromagnetic valve (14) is arranged on the outer surfaces of the fourth connecting pipe (15), the third connecting pipe (13) and the fourth communicating pipe (19), and the temperature control switch (20) is arranged on one side of the first connecting pipe (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110519704.XA CN113237255A (en) | 2021-05-13 | 2021-05-13 | Refrigerant is with purifying appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110519704.XA CN113237255A (en) | 2021-05-13 | 2021-05-13 | Refrigerant is with purifying appearance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113237255A true CN113237255A (en) | 2021-08-10 |
Family
ID=77133895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110519704.XA Pending CN113237255A (en) | 2021-05-13 | 2021-05-13 | Refrigerant is with purifying appearance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113237255A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115253432A (en) * | 2022-08-05 | 2022-11-01 | 南京明盛制冷科技有限公司 | Automatic purify cold water machine of filter screen and optimize structure |
-
2021
- 2021-05-13 CN CN202110519704.XA patent/CN113237255A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115253432A (en) * | 2022-08-05 | 2022-11-01 | 南京明盛制冷科技有限公司 | Automatic purify cold water machine of filter screen and optimize structure |
| CN115253432B (en) * | 2022-08-05 | 2023-08-08 | 南京明盛制冷科技有限公司 | Water chiller optimization structure of automatic purification filter screen |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210810 |
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| WD01 | Invention patent application deemed withdrawn after publication |