CN115325735A - Cold air defrosting system and working method - Google Patents
Cold air defrosting system and working method Download PDFInfo
- Publication number
- CN115325735A CN115325735A CN202211037312.0A CN202211037312A CN115325735A CN 115325735 A CN115325735 A CN 115325735A CN 202211037312 A CN202211037312 A CN 202211037312A CN 115325735 A CN115325735 A CN 115325735A
- Authority
- CN
- China
- Prior art keywords
- air
- valve
- heat exchanger
- refrigeration
- condenser
- Prior art date
- 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
- 238000010257 thawing Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000005057 refrigeration Methods 0.000 claims abstract description 60
- 238000004321 preservation Methods 0.000 claims abstract description 16
- 239000003507 refrigerant Substances 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 8
- 238000011017 operating method Methods 0.000 claims 1
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/37—Capillary tubes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Defrosting Systems (AREA)
Abstract
The invention relates to the technical field of refrigeration equipment, in particular to a cold air defrosting system and a working method, wherein an air inlet is sequentially connected with a first dry filter, an air compressor, a second dry filter, a first electromagnetic valve, a precooling system, a heat preservation pipe, a second heat exchanger and a cold air releasing pipeline; the precooling system comprises a first heat exchanger, a condenser, a refrigeration compressor and a fan, wherein the first heat exchanger comprises five branches which are respectively connected with a first electromagnetic valve, a heat preservation pipe, a second electromagnetic valve, a capillary tube and a reversing valve, the second electromagnetic valve is sequentially connected with a heat valve and the condenser, the capillary tube is connected with the condenser, the reversing valve is a four-way valve, two valve ports are respectively connected with the first heat exchanger and the condenser, and the other two valve ports are respectively connected with an air outlet and an air return hole of the compressor. The invention can realize defrosting without entering a refrigeration house manually, has no need of checking the frosting condition after being used for a long time, has a promoting effect on reducing the fault risk point of a refrigerating system and improves the operation stability of a unit.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a cold air defrosting system and a working method.
Background
The refrigeration house refrigeration equipment is mainly applied to the fields of scientific research, medical treatment, pharmacy, chemical industry, food and the like. With the progress of society and the development of refrigeration technology, scientific research or medical institutions need to store samples and some special materials in the fields of biological pharmacy or chemical industry in a constant-temperature environment, so that higher requirements are put forward on refrigeration equipment and personnel operation, and particularly strict requirements are put forward on a refrigeration equipment safety system. The core component of the low-temperature freezer equipment is the safety of a refrigeration system and a storage sample, the evaporator frosting site cannot be avoided due to long-term use, the temperature of the freezer is low, and the damage to a human body caused by manual defrosting at low temperature is large.
Disclosure of Invention
The invention provides a cold air defrosting system and a working method, which solve the problem that a related refrigerating system of a refrigeration house in the prior art cannot automatically defrost.
A cold air defrosting system is characterized in that an air inlet is sequentially connected with a first dry filter, an air compressor, a second dry filter, a first electromagnetic valve, a precooling system, a heat preservation pipe, a second heat exchanger and a cold air releasing pipeline;
the precooling system comprises a first heat exchanger, a condenser, a refrigeration compressor and a fan, wherein the first heat exchanger comprises five branches which are respectively connected with a first electromagnetic valve, a heat preservation pipe, a second electromagnetic valve, a capillary tube and a reversing valve, the second electromagnetic valve is sequentially connected with a heat valve and the condenser, the capillary tube is connected with the condenser, the reversing valve is a four-way valve, two valve ports are respectively connected with the first heat exchanger and the condenser, and the other two valve ports are respectively connected with an air outlet hole and an air return hole of the refrigeration compressor;
the fan is arranged between the refrigeration compressor and the condenser.
Preferably, the second heat exchanger and the cold air release pipeline are arranged inside the refrigeration house, and the cold air release pipeline is arranged at the position close to the refrigeration evaporator of the refrigeration house.
Preferably, the air inlet, the first dry filter, the air compressor, the second dry filter, the first electromagnetic valve and the precooling system are all arranged outside the refrigeration house.
Preferably, one end of the heat preservation pipe is arranged in the refrigeration house and connected with the second heat exchanger, and the other end of the heat preservation pipe is arranged outside the refrigeration house and connected with the precooling system.
A working method of a cold air defrosting system using the cold air defrosting system comprises the following steps:
setting fixed time for defrosting operation, and when the first electromagnetic valve is in an open state, allowing normal-temperature air to enter the air compressor through the first drying filter, and allowing the air to enter the precooling system through the second drying filter and the first electromagnetic valve;
a refrigeration compressor of the precooling system compresses a refrigerant, the refrigerant enters a condenser through a reversing valve, the refrigerant enters a first heat exchanger through two throttling branches of a capillary tube and a thermal valve in parallel at the same time, and after the refrigerant exchanges heat with normal-temperature dry air flowing in from the first branch of the first heat exchanger, the refrigerant returns to the refrigeration compressor through the reversing valve, and the refrigerant is subjected to reciprocating cycle heat exchange refrigeration;
after being treated by the precooling system, the air enters the secondary heat exchanger through the heat-insulating pipe, and the secondary heat exchanger cools the air again, and the air is discharged onto a refrigeration evaporator in a cold storage through a cold air release pipeline to blow off frost on the evaporator.
Preferably, after the fixed time is reached, defrosting is carried out, and reversing is controlled by a reversing valve, so that hot air of the refrigeration compressor does not firstly enter the condenser, but firstly enters the heat exchanger, and defrosting is carried out by hot air.
Compared with the prior art, the invention can realize defrosting without entering a refrigeration house manually, and the defrosting condition is not needed to be checked after the refrigerator is used for a long time, thereby promoting the reduction of the fault risk point of a refrigerating system and improving the operation stability of a unit.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a block diagram of the pre-chilling system of FIG. 1;
FIG. 3 is a diagram illustrating the operation of the pre-cooling system during cooling;
FIG. 4 illustrates the operation of the pre-chilling system during defrosting;
the reference numerals include: the method comprises the following steps of 1-an air inlet, 2-a first drying filter, 3-an air compressor, 4-a second drying filter, 5-a first electromagnetic valve, 6-a precooling system, 7-a heat preservation pipe, 8-a second heat exchanger, 9-a cold air releasing pipeline, 10-a refrigerator, 11-a refrigerating evaporator, 12-a first heat exchanger, 13-a second electromagnetic valve, 14-a thermal valve, 15-a condenser, 16-a capillary tube, 17-a fan, 18-a refrigerating compressor and 19-a reversing valve.
Detailed Description
The following embodiments are further illustrated in the following description:
a cold air defrosting system is shown in figure 1, wherein an air inlet 1 is sequentially connected with a first dry filter 2, an air compressor 3, a second dry filter 4, a first electromagnetic valve 5, a precooling system 6, a heat preservation pipe 7, a second heat exchanger 8 and a cold air releasing pipeline 9;
as shown in fig. 2, the pre-cooling system 6 includes a first heat exchanger 12, a condenser 15, a refrigeration compressor 18 and a fan 17, the first heat exchanger 12 includes five branches, which are respectively connected to a first electromagnetic valve 5, a heat preservation pipe 7, a second electromagnetic valve 13, a capillary tube 16 and a reversing valve 19, the second electromagnetic valve 13 is sequentially connected to a thermal valve 14 and the condenser 15, the capillary tube 16 is connected to the condenser 15, the reversing valve 19 is a four-way valve, two valve ports are respectively connected to the first heat exchanger 12 and the condenser 15, and the other two valve ports are respectively connected to an air outlet and an air return hole of the refrigeration compressor 18;
the fan 17 is provided between the refrigerant compressor 18 and the condenser 15.
The second heat exchanger 8 and the cold air release pipeline 9 are arranged inside the refrigeration house 10, and the cold air release pipeline 9 is arranged at the position close to the refrigeration evaporator 11 of the refrigeration house 10.
The air inlet 1, the first drying filter 2, the air compressor 3, the second drying filter 4, the first electromagnetic valve 5 and the precooling system 6 are all arranged outside the refrigeration house 10.
One end of the heat preservation pipe 7 is arranged in the refrigeration house 10 and is connected with the second heat exchanger 8, and the other end of the heat preservation pipe is arranged in the refrigeration house 10 and is connected with the precooling system 6.
A working method of a cold air defrosting system using the cold air defrosting system comprises the following steps:
as shown in fig. 3, a number arrow indicates cold air, a triangle arrow indicates hot air, a fixed time is set for defrosting operation, and when the first electromagnetic valve 5 is in an open state, normal temperature air enters the air compressor 3 through the first drying filter 2, and enters the precooling system 6 through the second drying filter 4 and the first electromagnetic valve 5;
a refrigerant is compressed by a refrigeration compressor 18 of the precooling system 6, enters a condenser 15 through a reversing valve 19, then enters the first heat exchanger 12 through two throttling branches of a capillary tube 16 and a thermal valve 14 in parallel at the same time, exchanges heat with normal-temperature dry air flowing in from the first branch of the first heat exchanger 12, returns to the refrigeration compressor 18 through the reversing valve 19, and is subjected to reciprocating cycle heat exchange refrigeration;
after being treated by the precooling system 6, the air enters the secondary heat exchanger through the heat preservation pipe 7, and the secondary heat exchanger cools the air again, and the air is discharged to the refrigeration evaporator 11 in the refrigeration house 10 through the cold air release pipeline 9 to blow off frost on the evaporator.
As shown in fig. 4, after the fixed time is reached, defrosting is performed, and the reversing is controlled by the reversing valve 19, so that the hot air of the refrigeration compressor 18 does not first enter the condenser 15, but first enters the heat exchanger, and defrosting is performed by the hot air.
The air compressor 3 provides an air pressure source, air is compressed by the air compressor 3 through drying and filtering and then is pumped into the pre-cooling system 6 through the electromagnetic valve, and the pre-cooling system 6 cools the normal-temperature air in the air compressor 3 to be below 0 ℃ through refrigeration.
The second heat exchanger 8 exchanges heat with the pre-cooled air again, the temperature of the pre-cooled air is reduced to the temperature inside the refrigeration house 10, and low-temperature cold air after the 8-stage heat exchange of the second heat exchanger enters the cold air release pipeline 9 and is sprayed onto the evaporator through capillary holes to form pressure defrosting.
In the following description of the embodiment, the cold-heat exchange trend in each component of the pre-cooling system 6 is described, during refrigeration, the refrigeration compressor 18 sends the refrigerant carrying hot gas to the condenser 15 through the reversing valve 19, the condenser 15 divides the hot gas into two paths which are respectively sent to the capillary tube 16 and the thermal valve 14, the temperature is reduced after throttling and sent to the first heat exchanger 12, the first heat exchanger 12 discharges the refrigerant and air with lower temperature to the reversing valve 19 and then sent to the refrigeration compressor 18, the refrigeration compressor 18 raises the temperature of the refrigerant again, the next cycle is performed, at this time, the interior of the refrigeration house 10 is continuously defrosted (pressure defrosting, because of the injected cold air, refrigeration is not affected).
When the pre-cooling system 6 defrosts, the hot air in the refrigeration compressor 18 is directly sent to the second heat exchanger 8 by the reversing valve 19, the frost in the second heat exchanger 8 is melted by the heat, then the air is cooled and sent to the reversing valve 19 through the capillary tube 16 and the condenser 15, the air is sent to the refrigeration compressor 18 by the reversing valve 19 to be heated again, at the moment, the second electromagnetic valve 13 is closed, and the thermal valve 14 is closed accordingly.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (6)
1. A cold air defrosting system is characterized in that an air inlet is sequentially connected with a first dry filter, an air compressor, a second dry filter, a first electromagnetic valve, a precooling system, a heat preservation pipe, a second heat exchanger and a cold air releasing pipeline;
the precooling system comprises a first heat exchanger, a condenser, a refrigeration compressor and a fan, wherein the first heat exchanger comprises five branches which are respectively connected with a first electromagnetic valve, a heat preservation pipe, a second electromagnetic valve, a capillary tube and a reversing valve, the second electromagnetic valve is sequentially connected with a thermal valve and the condenser, the capillary tube is connected with the condenser, the reversing valve is a four-way valve, two valve ports are respectively connected with the first heat exchanger and the condenser, and the other two valve ports are respectively connected with an air outlet and an air return hole of the refrigeration compressor;
the fan is arranged between the refrigeration compressor and the condenser.
2. The cold air defrost system of claim 1 wherein the second heat exchanger and the cold air release line are disposed within the refrigerated storage, the cold air release line being mounted proximate to the refrigeration evaporator of the refrigerated storage.
3. The cold air defrosting system of claim 2, wherein the air inlet, the first dry filter, the air compressor, the second dry filter, the first solenoid valve and the pre-cooling system are all disposed outside the freezer.
4. The cold air defrosting system of claim 3, wherein one end of the heat preservation pipe is arranged in the refrigeration house and connected with the second heat exchanger, and the other end of the heat preservation pipe is arranged outside the refrigeration house and connected with the precooling system.
5. A method for operating a cold air defrost system using a cold air defrost system as claimed in any one of claims 1-4, comprising:
setting fixed time for defrosting operation, and when the first electromagnetic valve is in an open state, allowing normal-temperature air to enter the air compressor through the first drying filter, and allowing the air to enter the precooling system through the second drying filter and the first electromagnetic valve;
a refrigeration compressor of the precooling system compresses a refrigerant, the refrigerant enters a condenser through a reversing valve, the refrigerant enters a first heat exchanger through two throttling branches of a capillary tube and a thermal valve in parallel at the same time, exchanges heat with normal-temperature dry air flowing in from the first branch of the first heat exchanger, returns to the refrigeration compressor through the reversing valve, and performs reciprocating circulation heat exchange refrigeration;
after being treated by the precooling system, the air enters the secondary heat exchanger through the heat-insulating pipe, and the secondary heat exchanger cools the air again, and the air is discharged onto a refrigeration evaporator in a cold storage through a cold air release pipeline to blow off frost on the evaporator.
6. A cold air defrosting system operating method as claimed in claim 5, wherein defrosting is performed after a fixed time is reached, and the direction change is controlled by the direction change valve so that the hot air of the refrigerating compressor does not first enter the condenser but first enters the heat exchanger and is defrosted by the hot air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211037312.0A CN115325735A (en) | 2022-08-26 | 2022-08-26 | Cold air defrosting system and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211037312.0A CN115325735A (en) | 2022-08-26 | 2022-08-26 | Cold air defrosting system and working method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115325735A true CN115325735A (en) | 2022-11-11 |
Family
ID=83928433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211037312.0A Pending CN115325735A (en) | 2022-08-26 | 2022-08-26 | Cold air defrosting system and working method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115325735A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1123137A (en) * | 1997-07-02 | 1999-01-26 | Nissin Kogyo Kk | Defrosting device in continuous freezer and method for defrosting of same |
| CN201066225Y (en) * | 2006-12-31 | 2008-05-28 | 中国农业机械化科学研究院 | Air automatic defrosting device |
| CN102778068A (en) * | 2012-07-30 | 2012-11-14 | 杨俊新 | Refrigeration system treatment method, refrigeration system using such method and electrical appliance |
| CN104880000A (en) * | 2015-05-15 | 2015-09-02 | 郑州亨利制冷设备有限公司 | Air defrosting system of evaporator for quick-freezing device |
| CN107166852A (en) * | 2017-07-05 | 2017-09-15 | 南通远征冷冻设备有限公司 | A kind of new automatic evaporator defroster |
| CN207865808U (en) * | 2017-12-11 | 2018-09-14 | 上海名联供应链管理有限公司 | Freezer calandria evaporator pressure-air blows frost and negative pressure collects and removes defrosting system |
| JP2019095177A (en) * | 2017-11-24 | 2019-06-20 | 富士電機株式会社 | Cooling device |
| CN210602418U (en) * | 2019-10-16 | 2020-05-22 | 范广东 | Compressed air type defrosting device |
| CN113701375A (en) * | 2021-09-09 | 2021-11-26 | 珠海格力电器股份有限公司 | Frostless type refrigeration house and control method thereof |
-
2022
- 2022-08-26 CN CN202211037312.0A patent/CN115325735A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1123137A (en) * | 1997-07-02 | 1999-01-26 | Nissin Kogyo Kk | Defrosting device in continuous freezer and method for defrosting of same |
| CN201066225Y (en) * | 2006-12-31 | 2008-05-28 | 中国农业机械化科学研究院 | Air automatic defrosting device |
| CN102778068A (en) * | 2012-07-30 | 2012-11-14 | 杨俊新 | Refrigeration system treatment method, refrigeration system using such method and electrical appliance |
| CN104880000A (en) * | 2015-05-15 | 2015-09-02 | 郑州亨利制冷设备有限公司 | Air defrosting system of evaporator for quick-freezing device |
| CN107166852A (en) * | 2017-07-05 | 2017-09-15 | 南通远征冷冻设备有限公司 | A kind of new automatic evaporator defroster |
| JP2019095177A (en) * | 2017-11-24 | 2019-06-20 | 富士電機株式会社 | Cooling device |
| CN207865808U (en) * | 2017-12-11 | 2018-09-14 | 上海名联供应链管理有限公司 | Freezer calandria evaporator pressure-air blows frost and negative pressure collects and removes defrosting system |
| CN210602418U (en) * | 2019-10-16 | 2020-05-22 | 范广东 | Compressed air type defrosting device |
| CN113701375A (en) * | 2021-09-09 | 2021-11-26 | 珠海格力电器股份有限公司 | Frostless type refrigeration house and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20100300127A1 (en) | Refrigerated Case | |
| US20130340469A1 (en) | Refrigerator | |
| CN109481000B (en) | Pressure-adjustable refrigeration device for cryotherapy and cryotherapy system | |
| CN111207534A (en) | Refrigeration system, refrigeration equipment and control method of refrigeration system | |
| CN106288549A (en) | A kind of reducer adapting to cryogenic quick freezing and method and application | |
| CN111426127A (en) | Ultra-low temperature refrigerator based on condensation heat is to defrosting of box crossbeam | |
| JP3847499B2 (en) | Two-stage compression refrigeration system | |
| CN115325735A (en) | Cold air defrosting system and working method | |
| JP6692082B2 (en) | Refrigeration system and refrigeration equipment | |
| KR102303804B1 (en) | Air conditioning system for refrigerating and freezing | |
| JP2002267317A (en) | Refrigerator | |
| JP2003004346A (en) | Cooling equipment | |
| CN212006380U (en) | Ultra-low temperature refrigerator based on condensation heat is to defrosting of box crossbeam | |
| CN204534882U (en) | The outdoor unit modules of multi-connected machine | |
| CN219264729U (en) | Freeze dryer | |
| CN219713696U (en) | Cascade refrigerating system and refrigerating equipment | |
| CN215864122U (en) | Compound refrigeration device with defrosting function | |
| CN221055345U (en) | Refrigerating system and refrigerating equipment | |
| JP2001201194A (en) | Cold storage system with deep freezer | |
| JPH06174342A (en) | Refrigerator | |
| CN219264688U (en) | Cold storage air cooler steam defrosting device | |
| JPH01184378A (en) | Defrosting device utilizing coolant of refrigerator/ freezer | |
| CN212308020U (en) | Cryotherapy system with return air utilization | |
| CN201653018U (en) | Refrigeration device defroster | |
| KR100212664B1 (en) | Quick freezing refrigeration cycle apparatus and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221111 |
|
| RJ01 | Rejection of invention patent application after publication |