CN104213931B - A kind of mine ventilation cooling and bootstrap system - Google Patents
A kind of mine ventilation cooling and bootstrap system Download PDFInfo
- Publication number
- CN104213931B CN104213931B CN201410476071.9A CN201410476071A CN104213931B CN 104213931 B CN104213931 B CN 104213931B CN 201410476071 A CN201410476071 A CN 201410476071A CN 104213931 B CN104213931 B CN 104213931B
- Authority
- CN
- China
- Prior art keywords
- import
- automatic
- outlet
- door
- mine
- 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.)
- Active
Links
Landscapes
- Ventilation (AREA)
Abstract
A kind of mine ventilation cooling and bootstrap system, comprise the heapstead be positioned at outside well head, the sidewall of heapstead is provided with several air heat exchangers, the refrigerating heat pump unit one end being positioned at machine room is connected by cold and hot matchmaker's water circulation pipe with air heat exchanger, the other end is connected with the cooling tower be positioned on machine room by cooling tower water circulation line, and refrigerating heat pump unit is also connected with mine pond by mine water circulation line.It effectively can not only reduce downhole temperature in summer by the cold wind crossed to down-hole input reducing temperature and humidity, can also effectively reduce down-hole humidity, improve the damp and hot integrated environment of well head and down-hole, realize comprehensive reducing temperature and humidity but not only realize the reducing temperature and humidity in partial duty face, improve miner's underground work integrated environment, improve miner's operating efficiency, ensure the safety in production in colliery, reach the object making downhole cooling wet down, in the winter time, waste heat by the high mine water of recovered temperature is used for well head insulation, realizes energy-saving and cost-reducing object.
Description
Technical field:
The present invention relates to a kind of mine ventilation cooling and bootstrap system.
Background technology:
Along with the expansion of coal resources in China limit of mining and the increase of mining rate, coal mining depth constantly increases, because of the harmful attention more and more causing Government and enterprise of colliery heat that mining depth increase causes.Underground thermal pollution has a strong impact on the safety in production in colliery, seriously affects the healthy of underground operators and life security, makes underground operators physical stamina letdown, and operating efficiency reduces, and affects the economic benefit in mine.Current underground thermal pollution administers main employing down-hole or aboveground centralized cold water falling temperature technique, by concentrated setting in down-hole or aboveground refrigeration unit output chilled water, deliver to the air cooler of coal-face through circulating water pump, reached the object of local cooling by the interchange of heat of air cooler.Meanwhile, cooling tower is set on the ground, in order to the condensation heat produced of freezing under drainage well.But above-mentioned technology only realizes the local refrigeration of work plane, to main lane and dynamo-electric chamber etc. without refrigeration, and wet down weak effect.Meanwhile, with the continuous extension of face length, local refrigeration decay significantly.In addition, the full import of its critical component, invests high, and system maintenance maintenance difficulty greatly, costly.
Summary of the invention:
The present invention is in order to make up the deficiencies in the prior art, provide a kind of mine ventilation cooling and bootstrap system, its reasonable in design, effectively downhole temperature can not only be reduced by the cold wind crossed to down-hole input reducing temperature and humidity in summer, can also effectively reduce down-hole humidity, improve the damp and hot integrated environment of well head and down-hole, realize comprehensive reducing temperature and humidity but not only realize the reducing temperature and humidity in partial duty face, improve miner's underground work integrated environment, improve miner's operating efficiency, ensure the safety in production in colliery, reach the object making downhole cooling wet down, in the winter time, the present invention's a kind of mine ventilation cooling and bootstrap system are used for well head insulation by the waste heat of the high mine water of recovered temperature, realize energy-saving and cost-reducing object, in addition, because this system equipment is all placed in ground, do not need underground equipment dust-proof, fire prevention and the particular/special requirement such as explosion-proof, projects investment cost reduces greatly, and operation maintenance is convenient, exempt the trouble of maintenance of underground and unfavorable, solve problems of the prior art.
The present invention for solving the problems of the technologies described above adopted technical scheme is:
A kind of mine ventilation cooling and bootstrap system, comprise the heapstead be positioned at outside well head, the sidewall of heapstead is provided with several air heat exchangers, the refrigerating heat pump unit one end being positioned at machine room is connected by cold and hot matchmaker's water circulation pipe with air heat exchanger, the other end is connected with the cooling tower be positioned on machine room by cooling tower water circulation line, and refrigerating heat pump unit is also connected with mine pond by mine water circulation line.
Import in heapstead and outlet outside are respectively equipped with an import parking passage and an outlet parking passage along turnover Car Track direction, inside import parking passage, two ends are respectively equipped with the automatic external door of import and import automatic internal door, inside outlet parking passage, two ends are respectively equipped with outlet automatic internal door and the automatic external door of outlet, at the close automatic external door of import, import automatic internal door, the ground of outlet automatic internal door and the automatic external door entry side of outlet is respectively equipped with photoelectric sensor, each photoelectric sensor, the automatic external door of import, import automatic internal door, outlet automatic internal door is all connected with the automatic control cabinet be located in heapstead with the automatic external door of outlet.
At the automatic external door of import, import automatic internal door, export automatic internal door and export on the turnover Car Track between the automatic external door photoelectric sensor corresponding with its entry side and be respectively equipped with a car arrester, car arrester is connected with automatic control cabinet.
The both sides of import parking passage and outlet parking passage are respectively equipped with fire-proof asbestos sandwich color steel plate.
Described air heat exchanger is unpowered heat exchanger, comprise an Al alloy thermal insulation seal frame, screen pack is provided with in the outside of Al alloy thermal insulation seal frame, inner side is provided with shutter, the coil pipe group that some layers are setting up and down is provided with in Al alloy thermal insulation seal frame between screen pack and shutter, described coil pipe group comprises some row copper tube coils, hydrophilic aluminium foil fin is provided with at the outer surface of copper tube coil, be equipped with a water accumulating disc in the bottom of each coil pipe group, each water accumulating disc is connected with the external world by a condensed water water pipe.
Described cooling tower is closed cooling tower.
The present invention adopts such scheme, reasonable in design, during summer, air heat exchanger carries out reducing temperature and humidity process to outdoor air, air after process is sent into well head and each tunnel, down-hole by the negative pressure then produced by original mine ventilation system, effectively improve the damp and hot integrated environment of well head and down-hole, realize comprehensive reducing temperature and humidity.A kind of mine ventilation cooling of the present invention and bootstrap system reducing temperature and humidity Be very effective, effectively can improve miner's underground work integrated environment, improve miner's operating efficiency, ensure the safety in production in colliery.During winter, air heat exchanger heats outdoor air, air after process is sent in heapstead by the negative pressure then produced by original mine ventilation system, ensure that wellhead temperature is not less than 2 DEG C, realize the object of the anti-freezing and heat-insulating of well head, heat needed for well head insulation is extracted from mine water by refrigerating heat pump unit, effectively utilize the waste heat of mine water, realize energy-saving and cost-reducing object, in addition, because this system equipment is all placed in ground, do not need underground equipment dust-proof, fire prevention and the particular/special requirement such as explosion-proof, projects investment cost reduces greatly, and operation maintenance is convenient, avoid the trouble of maintenance of underground and unfavorable.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of heapstead in the present invention.
Fig. 3 is the structural representation of air heat exchanger in the present invention.
Fig. 4 is the left TV structure schematic diagram of Fig. 3.
In figure, 1, heapstead, 2, air heat exchanger, 3, refrigerating heat pump unit, 4, cold and hot matchmaker's water circulation pipe, 5, cooling tower water circulation line, 6, cooling tower, 7, mine water circulation line, 8, mine pond, 9, turnover Car Track, 10, import parking passage, 11, outlet parking passage, 12, the automatic external door of import, 13, import automatic internal door, 14, outlet automatic internal door, 15, export automatic external door, 16, photoelectric sensor, 17, automatic control cabinet, 18, Al alloy thermal insulation seal frame, 19, screen pack, 20, shutter, 21, coil pipe group, 22, water accumulating disc, 23, condensed water water pipe, 24, car arrester.
Detailed description of the invention:
For clearly demonstrating the technical characterstic of this programme, below by detailed description of the invention, and in conjunction with its accompanying drawing, the present invention will be described in detail.
As Figure 1-4, a kind of mine ventilation cooling and bootstrap system, comprise the heapstead 1 be positioned at outside well head, the sidewall of heapstead 1 is provided with several air heat exchangers 2, refrigerating heat pump unit 3 one end being positioned at machine room is connected by cold and hot matchmaker's water circulation pipe 4 with air heat exchanger 2, the other end is connected with the cooling tower 6 be positioned on machine room by cooling tower water circulation line 5, and refrigerating heat pump unit 3 is also connected with mine pond 8 by mine water circulation line 7.
Import in heapstead 1 and outlet outside are respectively equipped with an import parking path 10 and an outlet parking passage 11 along turnover Car Track 9 direction, inside import parking path 10, two ends are respectively equipped with the automatic external door 12 of import and import automatic internal door 13, inside outlet parking passage 11, two ends are respectively equipped with outlet automatic internal door 14 and the automatic external door 15 of outlet, at the close automatic external door 12 of import, import automatic internal door 13, the ground of outlet automatic internal door 14 and automatic external door 15 entry side of outlet is respectively equipped with photoelectric sensor 16, each photoelectric sensor 16, the automatic external door 12 of import, import automatic internal door 13, outlet automatic internal door 14 is all connected with the automatic control cabinet 17 be located in heapstead 1 with the automatic external door 15 of outlet.
Be respectively equipped with a car arrester 24 at the automatic external door of import 12, import automatic internal door 13, outlet automatic internal door 14 with on exporting between automatic external door 15 photoelectric sensor 16 corresponding with its entry side turnover Car Track 9, car arrester 24 is connected with automatic control cabinet 17.Car arrester 24 can prevent from clashing into automatic door to lose control of one's vehicle, improves automatic control security object.
The both sides of import parking path 10 and outlet parking passage 11 are respectively equipped with fire-proof asbestos sandwich color steel plate, import parking path 10 and outlet parking passage 11 better can be sealed.
Described air heat exchanger is unpowered heat exchanger, comprise an Al alloy thermal insulation seal frame 18, screen pack 19 is provided with in the outside of Al alloy thermal insulation seal frame 18, inner side is provided with shutter 20, the coil pipe group 21 that some layers are setting up and down is provided with in Al alloy thermal insulation seal frame 18 between screen pack 19 and shutter 20, described coil pipe group 21 comprises some row copper tube coils, hydrophilic aluminium foil fin is provided with at the outer surface of copper tube coil, be equipped with a water accumulating disc 22 in the bottom of each coil pipe group 21, each water accumulating disc 22 is connected with the external world by a condensed water water pipe 23.Described non-power air heat exchanger does not arrange blower fan, utilize original mine ventilation system just the outdoor air after process can be sent into down-hole, reach summer administer heat evil and winter well head heat-preserving anti-freezing object, use the noise that non-power air heat exchanger does not have driven by power to cause, energy-saving effect is obvious, there is good economic and social benefit, and unpowered heat exchanger surrounding is sealed by Al alloy thermal insulation seal frame 18, reduce air leak rate of air curtain, this in effect increases the heat exchange amount of air, and effectively can isolate dust by arranging screen pack 19, prevent dirty the blocking up of fin and affect heat exchange, hydrophilic aluminium foil fin makes condensed water drain in time and can not be attached to fin surface to affect heat transfer effect.
Described cooling tower 6 is closed cooling tower, and closed cooling tower daily management is convenient, safeguards, stable and safe in operation without the need to frequent maintenance downtime.
During summer, outside air and air heat exchanger 2 heat exchange be arranged on the sidewall of heapstead 1, heat in chilled water draw air in air heat exchanger 2 carries out cooling process to outdoor air, and the chilled water after draw heat is back in refrigerating heat pump unit 3 through cold and hot matchmaker's water circulation pipe 4.The chilled water of cooling tower 6 output flows in refrigerating heat pump unit 3 through cooling tower water circulation line 5, chilled water draws the heat of the chilled water be back in refrigerating heat pump unit 3, chilled water is lowered the temperature, chilled water after draw heat to be back in cooling tower 6 by heat dissipation in air by cooling tower water circulation line 5, and the chilled water after cooling flow in air heat exchanger 2 again and circulates next time.Air after air heat exchanger 2 lowers the temperature process enters in heapstead 1, then the negative pressure utilizing original mine ventilation system to produce all will process rear air and send into each airway, down-hole, effectively improve the damp and hot integrated environment of well head and down-hole, realize comprehensive reducing temperature and humidity, reach the object making downhole cooling administer heat evil.
During winter, outside air and air heat exchanger 2 heat exchange be arranged on the sidewall of heapstead 1, heat medium water in air heat exchanger 2 heats outdoor air, and the heat medium water transferring heat to air is back in refrigerating heat pump unit 3 through cold and hot matchmaker's water circulation pipe 4.The mine water of high temperature flows in refrigerating heat pump unit 3 through mine water circulation line 7, mine water heats the heat medium water be back in refrigerating heat pump unit 3, be back to mine pond 8 in the mine water of heat medium water by mine water circulation line 7 by thermal release, the heat medium water after heating flow in air heat exchanger 2 again and circulates next time.Air after air heat exchanger 2 heats is sent in heapstead 1 under the negative pressure that original mine ventilation system produces, ensure that wellhead temperature is not less than 2 DEG C, realize the anti-freezing and heat-insulating to well head, heat needed for well head insulation is extracted from mine water by refrigerating heat pump unit 3, realizes energy-saving and cost-reducing object.
Mine ventilation cooling of the present invention and bootstrap system in order to make summer downhole cooling wet down effect and winter well head better heat preservation, Seal treatment is carried out to heapstead 1, in heapstead 1, inlet and outlet respectively arranges twice automatic door, heapstead 1 is not when personnel or vehicle pass in and out, and automatic door is closed can ensure the sealing that heapstead is absolute.Also effectively can block that outdoor air is unprocessed directly enters heapstead 1 when personnel or goods and materials turnover, control air leak rate of air curtain, specific implementation process is as follows: when vehicle enters heapstead 1, when vehicle arrives the photoelectric sensor 16 of import automatic external door 12 entry side, photoelectric sensor 16 sends a signal to automatic control cabinet 17, automatic control cabinet 17 controls the automatic external door 12 of import and opens, then the car arrester 24 of import automatic external door 12 entry side is opened, vehicle is allowed to enter import parking path 10, the car arrester 24 of the automatic external door 12 of import subsequently entry side cuts out, then import automatic external door 12 quick closedown, now import automatic internal door 13 is in closed condition, avoid outdoor air when the automatic external door 12 of import is opened to enter in heapstead 1.Vehicle continues to move ahead, when vehicle arrives the photoelectric sensor 16 of import automatic internal door 13 entry side, photoelectric sensor 16 sends a signal to automatic control cabinet 17, automatic control cabinet 17 controls import automatic internal door 13 and opens, then the car arrester 24 controlling import automatic internal door 13 entry side is opened, allow vehicle to enter heapstead 1 by import parking path 10 inner, the car arrester 24 of import automatic internal door 13 entry side cuts out subsequently, then import automatic internal door 13 quick closedown.When vehicle goes out heapstead 1, when vehicle arrives the photoelectric sensor 16 of outlet automatic internal door 14 entry side, photoelectric sensor 16 sends a signal to automatic control cabinet 17, automatic control cabinet 17 controls outlet automatic internal door 14 and opens, then the car arrester 24 controlling outlet automatic internal door 14 entry side is opened, vehicle is allowed to enter outlet parking passage 11, the car arrester 24 exporting automatic internal door 14 entry side subsequently cuts out, then automatic internal door 14 quick closedown is exported, now, export automatic external door 15 and be in closed condition.Vehicle continues to move ahead, when vehicle arrives the photoelectric sensor 16 of automatic external door 15 entry side of outlet, photoelectric sensor 16 sends a signal to automatic control cabinet 17, automatic control cabinet 17 controls the automatic external door 16 of outlet and opens, then the car arrester 24 exporting automatic external door 16 entry side is opened, after vehicle rolls outlet parking passage 11 away from, the car arrester 24 of automatic external door 15 entry side of outlet cuts out, and then exports the quick closedown of automatic external door 15.In the body process of personnel's vehicles while passing heapstead 1, when front road automatic door is opened, the rear road automatic door of its correspondence keeps closing, open while avoiding two sects, effectively prevent outdoor air from infiltrating, realize good the closing in heapstead 1, control air leak rate of air curtain within 10%.By the Seal treatment to heapstead 1, present invention achieves the process of full blast amount, ensure that the whole air quantity entering heapstead and down-hole are all by after heat exchanger process, make summer downhole cooling wet down effect and winter well head better heat preservation.
The present invention does not describe part in detail, is the known technology of those skilled in the art of the present technique.
Claims (6)
1. a mine ventilation cooling and bootstrap system, it is characterized in that: comprise the heapstead be positioned at outside well head, the sidewall of heapstead is provided with several air heat exchangers, the refrigerating heat pump unit one end being positioned at machine room is connected by cold and hot matchmaker's water circulation pipe with air heat exchanger, the other end is connected with the cooling tower be positioned on machine room by cooling tower water circulation line, and refrigerating heat pump unit is also connected with mine pond by mine water circulation line.
2. a kind of mine ventilation cooling according to claim 1 and bootstrap system, it is characterized in that: the import in heapstead and outlet outside are respectively equipped with an import parking passage and an outlet parking passage along turnover Car Track direction, inside import parking passage, two ends are respectively equipped with the automatic external door of import and import automatic internal door, inside outlet parking passage, two ends are respectively equipped with outlet automatic internal door and the automatic external door of outlet, at the close automatic external door of import, import automatic internal door, the ground of outlet automatic internal door and the automatic external door entry side of outlet is respectively equipped with photoelectric sensor, each photoelectric sensor, the automatic external door of import, import automatic internal door, outlet automatic internal door is all connected with the automatic control cabinet be located in heapstead with the automatic external door of outlet.
3. a kind of mine ventilation cooling according to claim 2 and bootstrap system, it is characterized in that: at the automatic external door of import, import automatic internal door, export automatic internal door and export on the turnover Car Track between the automatic external door photoelectric sensor corresponding with its entry side and be respectively equipped with a car arrester, car arrester is connected with automatic control cabinet.
4. a kind of mine ventilation cooling according to claim 2 and bootstrap system, is characterized in that: the both sides of import parking passage and outlet parking passage are respectively equipped with fire-proof asbestos sandwich color steel plate.
5. a kind of mine ventilation cooling according to claim 1 and bootstrap system, it is characterized in that: described air heat exchanger is unpowered heat exchanger, comprise an Al alloy thermal insulation seal frame, screen pack is provided with in the outside of Al alloy thermal insulation seal frame, inner side is provided with shutter, the coil pipe group that some layers are setting up and down is provided with in Al alloy thermal insulation seal frame between screen pack and shutter, described coil pipe group comprises some row copper tube coils, hydrophilic aluminium foil fin is provided with at the outer surface of copper tube coil, a water accumulating disc is equipped with in the bottom of each coil pipe group, each water accumulating disc is connected with the external world by a condensed water water pipe.
6. a kind of mine ventilation cooling according to claim 1 and bootstrap system, is characterized in that: described cooling tower is closed cooling tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410476071.9A CN104213931B (en) | 2014-09-17 | 2014-09-17 | A kind of mine ventilation cooling and bootstrap system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410476071.9A CN104213931B (en) | 2014-09-17 | 2014-09-17 | A kind of mine ventilation cooling and bootstrap system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104213931A CN104213931A (en) | 2014-12-17 |
| CN104213931B true CN104213931B (en) | 2016-03-23 |
Family
ID=52095798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410476071.9A Active CN104213931B (en) | 2014-09-17 | 2014-09-17 | A kind of mine ventilation cooling and bootstrap system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104213931B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500126A (en) * | 2015-01-06 | 2015-04-08 | 济南国海能源科技有限公司 | Comprehensive mine cooling device |
| CN105909297A (en) * | 2016-06-06 | 2016-08-31 | 何满潮 | Anti-freezing system and method for well mouth of auxiliary well of mine |
| CN107299840A (en) * | 2017-08-14 | 2017-10-27 | 中环智创（北京）科技有限公司 | The integrated system of mine cooling and heat energy utilization |
| CN109252887A (en) * | 2018-11-07 | 2019-01-22 | 江南大学 | A kind of design method of mining unpowered heat-exchange system |
| CN110397465B (en) * | 2019-06-28 | 2024-03-26 | 江南大学 | Full air volume cooling system and method for coal face |
| CN110578951A (en) * | 2019-08-29 | 2019-12-17 | 龙口矿业集团有限公司 | deep well heat energy comprehensive utilization system |
| CN112696825A (en) * | 2019-10-22 | 2021-04-23 | 太原理工大学 | Mine well head protector |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE405168B (en) * | 1975-12-22 | 1978-11-20 | Atomenergi Ab | DEVICE FOR TRANSFERING HEAT FROM FRAN AIR TO SUPPLY AIR |
| RU2162945C2 (en) * | 1998-06-26 | 2001-02-10 | Атрушкевич Аркадий Анисимович | Method of utilization of geothermal energy in ventilation of mines |
| CN102733840B (en) * | 2012-07-12 | 2015-05-13 | 北京矿大节能科技有限公司 | Mine underground cooling and waste heat recycling system |
| CN103410549B (en) * | 2012-12-20 | 2015-10-28 | 兖州煤业股份有限公司 | Utilize the System and method for that residual heat of electric power plant is lowered the temperature for mine ventilation |
| CN103306705B (en) * | 2013-06-13 | 2016-05-18 | 中国科学院工程热物理研究所 | Mine cooling refrigeration system |
| CN204082193U (en) * | 2014-09-17 | 2015-01-07 | 济南国海能源科技有限公司 | A kind of mine ventilation cooling and bootstrap system |
-
2014
- 2014-09-17 CN CN201410476071.9A patent/CN104213931B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104213931A (en) | 2014-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104213931B (en) | A kind of mine ventilation cooling and bootstrap system | |
| CN103410549B (en) | Utilize the System and method for that residual heat of electric power plant is lowered the temperature for mine ventilation | |
| CN113586120A (en) | Combined hot air jet heat preservation device for cold region tunnel and control method | |
| CN205805613U (en) | A kind of mine return air heating system | |
| CN103335445B (en) | System and method for utilizing gas-driven compressor waste heat | |
| CN204082193U (en) | A kind of mine ventilation cooling and bootstrap system | |
| CN203615586U (en) | Pitshaft freeze-proofing heater used in high and cold areas | |
| CN107461850A (en) | A kind of common fief face centralization integrated heat supply refrigeration system of coal heat | |
| CN208010388U (en) | A kind of combination cooling system for the serious mine of heat evil | |
| CN104864528B (en) | A kind of straight swollen cold type ventilation and air conditioning system of subway station vertical shaft type evaporative condenser | |
| CN203880855U (en) | Circulation heat exchange energy-saving device outside communication machine room | |
| CN2674102Y (en) | Low temp. rediation temp.-lowering system using ice in mine | |
| CN204943963U (en) | One utilizes swallet heat supply/refrigeration system | |
| CN203053089U (en) | Low-temperature heat energy recovering system of mine return air source | |
| CN207214308U (en) | A kind of building enclosure based on soil source heat exchange | |
| CN218669434U (en) | Combined hot air jet heat preservation device for cold region tunnel | |
| CN204345885U (en) | The special non-power air heat-exchanger rig of a kind of mine ventilation | |
| CN103615277B (en) | A kind of type pit cooling system | |
| CN204345969U (en) | A kind of mine cooling and heating system | |
| CN203813648U (en) | Frequency converter for coal mine ventilator | |
| CN104501456B (en) | A kind of mine cooling and heating system | |
| CN103712472A (en) | Boosted air cooling tower | |
| CN221222993U (en) | Self-suction wellhead air conditioner | |
| CN204646293U (en) | A kind of mine cooling air-conditioning box | |
| CN203685256U (en) | Mine cooling system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |