CN113261457A - Automatic accurate simulation system for artificial climate environment in glass greenhouse - Google Patents
Automatic accurate simulation system for artificial climate environment in glass greenhouse Download PDFInfo
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- CN113261457A CN113261457A CN202110648786.8A CN202110648786A CN113261457A CN 113261457 A CN113261457 A CN 113261457A CN 202110648786 A CN202110648786 A CN 202110648786A CN 113261457 A CN113261457 A CN 113261457A
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- indoor unit
- air supply
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/246—Air-conditioning systems
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/241—Arrangement of opening or closing systems for windows and ventilation panels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
Abstract
The invention provides an automatic accurate simulation system of a glass greenhouse artificial climate environment, which comprises an indoor unit and an outdoor unit communicated with the indoor unit through a pipeline, wherein an air supply static pressure box is connected to the indoor unit, air supply pipelines are fixedly communicated with two sides of the air supply static pressure box, a plurality of air supply ports are uniformly arranged on the air supply pipelines, a return air static pressure box is arranged at the side end of the indoor unit and is communicated with the indoor unit through a pipeline valve, a return air pipeline is communicated with the return air static pressure box, and a plurality of return air ports are formed in the return air pipeline. The operation modes are multiple: the system has the operation modes of cooling dehumidification, heating dehumidification, cooling humidification, heating humidification and the like, and the operation from cooling dehumidification to heating humidification is realized through different operation modes, so that the adjustment range of refrigeration, heating, dehumidification and humidification of the system is expanded, and the requirements of different cold/heat/humidity loads can be met.
Description
Technical Field
The invention belongs to the technical field of glass greenhouse environment control systems, and particularly relates to an automatic accurate simulation system for artificial climate environments in a glass greenhouse.
Background
Present intelligent greenhouse is mostly wet curtain type temperature and humidity control system and traditional air conditioner control system, or increases humidity and influence great to the temperature, or the cold and hot wind of air conditioner causes the burn to the rice leaf in the greenhouse, hardly reaches the required humiture precision of experiment. Particularly, the temperature is not easy to reach the precision required by the experiment;
the requirement standards of the high-temperature identification experiment of the rice on the environmental conditions are that the average temperature is more than 33.0 ℃, the maximum temperature is more than 39.0 ℃, and the requirement lasts for more than 3 days. The temperature precision is required to be within plus or minus 1 ℃, the field high-temperature identification implemented at present is greatly influenced by weather conditions, and all experimental data are difficult to accurately collect, so that the identification experiment cannot be completed in a special year if the weather conditions are met.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide an automatic precise simulation system for artificial climate environment in a glass greenhouse to solve the problems in the background art.
In order to solve the technical problems, the invention adopts the technical scheme that: an automatic accurate simulation system of artificial climate environment in a glass greenhouse comprises an indoor unit and an outdoor unit communicated with the indoor unit through a pipeline;
the indoor unit is connected with an air supply static pressure box, air supply pipelines are fixedly communicated with two sides of the air supply static pressure box, and a plurality of air supply outlets are uniformly formed in the air supply pipelines;
the side end of the indoor unit is provided with a return air static pressure box, the return air static pressure box is communicated with the indoor unit through a pipeline valve, the return air static pressure box is communicated with a return air pipeline, and a plurality of return air inlets are formed in the return air pipeline.
Preferably, three sets of surface coolers are arranged at the position, close to the return air static pressure box, of the indoor unit, and dehumidification operation is performed when return air passing through the return air static pressure box passes through the surface coolers of the indoor unit in the greenhouse.
Preferably, an electric heater is further arranged in the indoor unit, and the electric heater is used for heating and regulating the greenhouse environment through electrode heating to perform heating operation.
Preferably, a first humidifier and a second humidifier are further arranged in the indoor unit, and the first humidifier and the second humidifier are respectively used for electric humidification and ultrasonic humidification and used for selecting humidification operation according to the requirement of environment humidity.
Preferably, an air supply fan is arranged in the indoor unit and close to the air supply static pressure box, and the air supply fan is communicated with the air supply static pressure box to complete air supply operation of the indoor unit to the air supply pipeline.
Preferably, a heat preservation water tank is arranged in the outdoor unit, the heat preservation water tank is communicated with an evaporator through a water pump, a refrigeration working medium is arranged in the evaporator, the refrigeration working medium absorbs heat of a cooled object in the evaporator and is vaporized into steam, the evaporator is also communicated with a compressor, the compressor extracts generated steam from the evaporator and compresses the steam to form high-temperature and high-pressure steam, the compressor is communicated with a condenser, the compressed high-temperature and high-pressure steam is sent to the condenser and then releases heat to a cooling medium to be condensed into high-pressure liquid, the high-temperature and high-pressure liquid enters the evaporator after being subjected to pressure reduction through a throttling mechanism by a drying filter communicated with the condenser, and the high-temperature and high-pressure steam is vaporized again to absorb heat of the cooled object, so that the circulation operation is realized.
Preferably, the heat-preservation water tank is provided with a water replenishing port for replenishing water and a sewage draining port for draining sewage.
Preferably, the compressor is configured as a dual-mode set compressor.
Preferably, the heat-preservation water tank, the evaporator and the surface cooler form a circulation loop.
Preferably, the indoor unit and the outdoor unit are respectively connected with a controller through signals.
Compared with the prior art, the invention has the following advantages:
1. the operation is more stable: the application cooling water set supplies with the refrigerated water refrigeration, has avoided the direct-expansion compressor frequently to open and stop, leads to unable refrigerated problem that lasts, makes the equipment operation more stable. The performance of the dehumidification temperature regulation system is improved, and the application range of the dehumidification temperature regulation system is expanded.
2. The adjustment precision is high: the refrigeration is carried out by adopting three-section type chilled water, the analog quantity is adopted for one section of the refrigeration, the analog quantity is adopted for the electrical heating and the electrical humidification, and the refrigeration quantity, the heating quantity and the humidification quantity of the system are finely adjusted so as to improve the adjustment precision of the temperature and the humidity. The temperature and humidity control is more accurate.
3. The operation modes are multiple: the system has the operation modes of cooling dehumidification, heating dehumidification, cooling humidification, heating humidification and the like, and the operation from cooling dehumidification to heating humidification is realized through different operation modes, so that the adjustment range of refrigeration, heating, dehumidification and humidification of the system is expanded, and the requirements of different cold/heat/humidity loads can be met.
4. Automatic control: according to the design requirements of indoor temperature and humidity, outdoor temperature and the running state of the system are detected in real time, and the running mode of the system is automatically switched according to the change of the indoor temperature and humidity and the outdoor temperature condition so as to guarantee the indoor temperature and humidity requirements and the safe running of the system.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the connection between the indoor unit and the outdoor unit according to the present invention;
description of reference numerals:
1-an indoor unit; 11-an air supply fan; 12-a first humidifier; 13-a second humidifier; 14-surface cooler; 15-an electric heater; 2, an outdoor unit; 21-a heat preservation water tank; 22-a condenser; 23-drying the filter; 24-a compressor; 25-an evaporator; 26-a water pump; 3-air supply static pressure box; 4-an air supply pipeline; 41-an air supply outlet; 5-return air static pressure box; 6-pipeline valve; 7-return air duct; 71-air return inlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, the present invention provides a technical solution: an automatic accurate simulation system of an artificial climate environment in a glass greenhouse comprises an indoor unit 1 and an outdoor unit 2 communicated with the indoor unit 1 through a pipeline; the indoor unit 1 is installed in the glass greenhouse, and the outdoor unit 2 is communicated with the indoor unit 1 through a pipeline to complete heating, cooling, humidifying and dehumidifying operations of the indoor unit 1 in the glass greenhouse.
The outdoor unit 2 is internally provided with a heat preservation water tank 21, and the heat preservation water tank 21 is provided with a water replenishing port for replenishing water and a sewage draining port for draining sewage.
The heat preservation water tank 21 is communicated with an evaporator 25 through a water pump 26, a refrigeration working medium is arranged in the evaporator 25, the refrigeration working medium is a refrigerant, the refrigeration working medium absorbs heat of a cooled object in the evaporator 25 and is vaporized into steam, the evaporator 25 is also communicated with a compressor 24, the compressor 24 extracts generated steam from the evaporator 25 and compresses the steam to form high-temperature and high-pressure steam, the compressor 24 is communicated with a condenser 22, the high-temperature and high-pressure steam formed by compression is sent to the condenser 22 and then releases heat to a cooling medium to be condensed into high-pressure liquid, the high-temperature and high-pressure liquid enters the evaporator 25 after being subjected to pressure reduction through a throttling mechanism by a drying filter 23 communicated with the condenser, the high-temperature and high-pressure liquid is vaporized again to absorb heat of the cooled object, and the operation is circulated, so that the water temperature in the heat preservation water tank 21 is controlled to be about 7 ℃.
The compressor 24 is configured as a dual-bank compressor for increasing compression power.
An air supply static pressure box 3 is connected to the indoor unit 1, air supply pipelines 4 are fixedly communicated with two sides of the air supply static pressure box 3, a plurality of air supply outlets 41 are uniformly arranged on the air supply pipelines 4, an air supply fan 11 is arranged in the indoor unit 1 close to the air supply static pressure box 3, the air supply fan 11 is communicated with the air supply static pressure box 3, and air supply operation of the indoor unit 1 to the air supply pipelines 4 is completed;
the side end of the indoor unit 1 is provided with a return air static pressure box 5, the return air static pressure box 5 is communicated with the indoor unit 1 through a pipeline valve 6, the return air static pressure box 5 is communicated with a return air pipeline 7, and a plurality of return air inlets 71 are formed in the return air pipeline 7.
The air supply pipeline 4 and the air return pipeline 7 are respectively arranged in an upper-air-supply two-side underground air return mode, the air supply pipeline 4 is arranged uniformly and efficiently, the air return pipeline 7 adopts lower-side underground air return without occupying the ground space, the service efficiency of the glass greenhouse is improved, the whole air supply pipeline 4 and the air return pipeline 7 are reasonable and efficient in layout, the temperature and humidity environment in the glass greenhouse is controlled stably, the precision is high, the actual temperature control precision in the glass greenhouse reaches +/-1.0 ℃, and the humidity precision reaches +/-10%.
Three groups of surface air coolers 14 are arranged at the position, close to the return air static pressure box 5, of the indoor unit 1, the heat preservation water tank 21, the evaporator 25 and the surface air coolers 14 form a circulation loop, and dehumidification operation is carried out when return air passing through the return air static pressure box 5 passes through the surface air coolers of the indoor unit 1 in the greenhouse.
An electric heater 15 is further arranged in the indoor unit 1, and the electric heater 15 regulates and controls the greenhouse environment through electrode heating to perform heating operation.
The indoor unit 1 is further provided with a first humidifier 12 and a second humidifier 13, wherein the first humidifier 12 and the second humidifier 13 are respectively used for electric humidification and ultrasonic humidification and are used for selecting humidification operation according to the requirement of environmental humidity.
The cooling automatically adjusts the refrigerating capacity according to the temperature difference of the glass greenhouse environment, the cold water with the temperature of about 7 ℃ in the heat insulation water tank 21 of the outdoor unit 2 is adopted and controlled by the pipeline valve 6, when the refrigeration is not needed, the pipeline valve 6 is closed, and when the refrigeration is required, the pipeline valve 6 is opened; the opening range of the pipeline valve 6 can realize the regulation of water flow from 0% to 100%, the cold regulation is easily realized, and the temperature and humidity control is very stable.
In order to facilitate the completion of the automatic and accurate control operation of the indoor unit 1 and the outdoor unit 2, the indoor unit 1 and the outdoor unit 2 are respectively connected with a controller through signals.
When the device is used, various climates and humiture are simulated according to the experiment requirements in the glass greenhouse, and the maximum load is calculated according to the worst working condition. And respectively carrying out different system control modes according to different indoor temperature and humidity requirements, and presetting the control modes in the controller.
1. When the glass greenhouse is in a high-temperature high-humidity environment, a dehumidification cooling mode is entered, specifically, when the glass greenhouse is in a high-temperature high-humidity condition, a proportional control pipeline valve 6 is adopted to control the size of the cooling capacity, so that the surface air cooler 14 is cooled and dehumidified, the low-temperature low-humidity air returns to the glass greenhouse, the refrigeration capacity matched with the load is opened mainly by adjusting the circulating water quantity of the surface air cooler 14, and the refrigeration capacity and the dehumidification capacity are further adjusted. In order to ensure that the temperature and the humidity are more stable, the refrigeration section can keep continuous operation, and the cold volume opening amount under different conditions is set inside according to the outdoor temperature and the design temperature difference.
2. In a low-temperature high-humidity environment, a dehumidification heating mode is entered, specifically, under an indoor low-temperature high-humidity condition, the system operates in the dehumidification heating mode, although the relative humidity is relatively high, the moisture content is relatively low, and after the air is heated by the electric heater 15, the relative humidity of the air is rapidly reduced under the condition that the moisture content is not changed, so that the indoor temperature and humidity can be controlled through the heating operation of the system, and the purpose of controlling the indoor air temperature and humidity is achieved.
3. When the glass greenhouse is in a low-temperature and low-humidity environment, a heating and humidifying mode is entered, when the indoor low-temperature and low-humidity environment is met, the refrigeration system stops working, the electric heater 15 is started to carry out electric heating and the first humidifier 12 is started to carry out electric humidification compensation, so that the aim of controlling the temperature and humidity of the air in the glass greenhouse is achieved, the indoor high temperature is required to be higher than 40 ℃, when the humidity is higher than 90%, on the basis of electric heating and electric humidification, the independent return air is needed to be added, the second humidifier 13 is added to carry out humidification in an ultrasonic humidifying section to serve as supplement, the temperature of the return air is as high as possible, and the water-containing capacity is increased.
4. When the air conditioner is in a high-temperature low-humidity environment, the air conditioner enters a cooling and humidifying mode, when the indoor high-temperature low-humidity environment is in the room, the refrigerating capacity matched with the calculated load is required to be started, the excessive refrigerating capacity is not required to be started to cause a large amount of dehumidification, meanwhile, the humidifying section is used for humidifying and compensating, the first humidifier 12 is adopted to carry out electric humidification as far as possible, the return air temperature is as high as possible, and the water-containing capacity is increased.
The system circulation mechanism is as follows:
1. circulation of the outdoor unit 2 of the constant temperature and humidity system: the operation of the compressor 24 enables the exhaust port to exhaust high-temperature and high-pressure gas, then the gas enters the condenser 22 to be cooled into low-temperature and high-pressure gas, the low-temperature and low-pressure gas is obtained by intercepting the liquid through the capillary tube of the condenser 22, the liquid is evaporated and absorbed heat through the evaporator 25, the liquid returns to the compressor 24 to be changed into low-temperature and low-pressure gas, and the circulation is repeated, so that the externally-circulated aqueous medium refrigeration can be completed.
2. The indoor unit 1 of the constant temperature and humidity system is internally circulated, under the condition of normal starting, the operation of a fan of the air supply fan 11 enables moist air to be sucked from the air return opening 71, water in the air is adsorbed on a copper pipe of the surface air cooler 14 by a heat exchanger for supplying water and refrigerating through the water cooler 2 to be condensed and drained, the air is changed into dry air and blown out from an air outlet, and meanwhile, the effects of cooling and dehumidifying are achieved; when the air humidity needs to be improved, the built-in humidification barrel 12 is started to compensate the moisture and is controlled by a part of analog quantity in a micro-scale mode, and the humidification quantity is larger than the dehumidification quantity when the parameters are designed; when the air temperature needs to be raised, the built-in heating rod 15 is started to compensate heat, the heat is controlled by a part of analog quantity in a micro-scale mode, and the heating quantity is larger than the refrigerating quantity of the cooling system during design parameters.
The automatic accurate simulation system of the artificial climate environment in the glass greenhouse is used for providing a pipeline type temperature and humidity adjusting method and equipment which can supply heat, refrigerate, dehumidify and humidify in the glass greenhouse under different indoor and outdoor humiture so as to meet the indoor humiture requirement, and has the following advantages:
1. the operation is more stable: the application cooling water set supplies with the refrigerated water refrigeration, has avoided the direct-expansion compressor frequently to open and stop, leads to unable refrigerated problem that lasts, makes the equipment operation more stable. The performance of the dehumidification temperature regulation system is improved, and the application range of the dehumidification temperature regulation system is expanded.
2. The adjustment precision is high: the refrigeration is carried out by adopting three-section type chilled water, the analog quantity is adopted for one section of the refrigeration, the analog quantity is adopted for the electrical heating and the electrical humidification, and the refrigeration quantity, the heating quantity and the humidification quantity of the system are finely adjusted so as to improve the adjustment precision of the temperature and the humidity. The temperature and humidity control is more accurate.
3. The operation modes are multiple: the system has the operation modes of cooling dehumidification, heating dehumidification, cooling humidification, heating humidification and the like, and the operation from cooling dehumidification to heating humidification is realized through different operation modes, so that the adjustment range of refrigeration, heating, dehumidification and humidification of the system is expanded, and the requirements of different cold/heat/humidity loads can be met.
4. Automatic control: according to the design requirements of indoor temperature and humidity, outdoor temperature and the running state of the system are detected in real time, and the running mode of the system is automatically switched according to the change of the indoor temperature and humidity and the outdoor temperature condition so as to guarantee the indoor temperature and humidity requirements and the safe running of the system.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An automatic accurate analog system of artificial climate environment in glass greenhouse which characterized in that: comprises an indoor unit (1) and an outdoor unit (2) communicated with the indoor unit (1) through a pipeline;
the indoor unit (1) is connected with an air supply static pressure box (3), air supply pipelines (4) are fixedly communicated with two sides of the air supply static pressure box (3), and a plurality of air supply outlets (41) are uniformly arranged on the air supply pipelines (4);
the side end of the indoor unit (1) is provided with a return air static pressure box (5), the return air static pressure box (5) is communicated with the indoor unit (1) through a pipeline valve (6), the return air static pressure box (5) is communicated with a return air pipeline (7), and a plurality of return air inlets (71) are formed in the return air pipeline (7).
2. An automatic accurate simulation system of artificial climate environment in glass greenhouse according to claim 1 is characterized in that the indoor set (1) near the return air static pressure box (5) is provided with three sets of surface air coolers (14), and the return air passing through the return air static pressure box (5) in the greenhouse is dehumidified when passing through the surface air cooler of the indoor set (1).
3. The system for automatically and accurately simulating the artificial climate environment in the glass greenhouse as claimed in claim 1, wherein an electric heater (15) is further arranged in the indoor unit (1), and the electric heater (15) regulates the greenhouse environment through electrode heating for heating operation.
4. The system for automatically and accurately simulating the artificial climate environment in the glass greenhouse as claimed in claim 1, wherein a first humidifier (12) and a second humidifier (13) are further arranged in the indoor unit (1), and the first humidifier (12) and the second humidifier (13) are respectively used for electric humidification and ultrasonic humidification and are used for selecting humidification operation according to the environmental humidity requirement.
5. The system for automatically and accurately simulating the artificial climate environment in the glass greenhouse according to claim 1, wherein an air supply fan (11) is arranged in the indoor unit (1) close to the air supply static pressure box (3), and the air supply fan (11) is communicated with the air supply static pressure box (3) to complete the air supply operation of the indoor unit (1) to the air supply pipeline (4).
6. The system for automatically and accurately simulating the artificial climate environment in the glass greenhouse according to claim 1, wherein a heat-insulating water tank (21) is arranged in the outdoor unit (2), the heat-insulating water tank (21) is communicated with an evaporator (25) through a water pump (26), a refrigerant is arranged in the evaporator (25), the refrigerant absorbs heat of a cooled object in the evaporator (25) and is vaporized into steam, the evaporator (25) is also communicated with a compressor (24), the compressor (24) extracts generated steam from the evaporator (25) and compresses the steam into high-temperature and high-pressure steam, the compressor (24) is communicated with a condenser (22), the compressed high-temperature and high-pressure steam is sent to the condenser (22) and then releases heat to the cooling medium to form high-pressure liquid, the high-temperature and high-pressure steam enters the evaporator (25) after being depressurized through a throttling mechanism by a drying filter (23) communicated with the condenser, and the heat of the cooled object is vaporized and absorbed again, and the operation is circulated.
7. The automatic accurate simulation system of artificial climate environment in glass greenhouse of claim 6, characterized in that the heat preservation water tank (21) is provided with water replenishing port for replenishing water and sewage draining port for draining sewage.
8. An automated precision simulation system of an artificial climate environment in a glass greenhouse according to claim 6, characterized in that the compressor (24) is configured as a dual-module compressor.
9. An automated precision simulation system of an artificial climate environment in a glass greenhouse according to claim 6, wherein the holding water tank (21) and the evaporator (25) form a circulation loop with the surface cooler (14).
10. The system for the automated precise simulation of the artificial climate environment in a glass greenhouse of claim 1, wherein the indoor unit (1) and the outdoor unit (2) are respectively connected with a controller by signals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110648786.8A CN113261457A (en) | 2021-06-10 | 2021-06-10 | Automatic accurate simulation system for artificial climate environment in glass greenhouse |
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| CN202110648786.8A CN113261457A (en) | 2021-06-10 | 2021-06-10 | Automatic accurate simulation system for artificial climate environment in glass greenhouse |
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| CN113261457A true CN113261457A (en) | 2021-08-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113747769A (en) * | 2021-09-17 | 2021-12-03 | 玄铁(广州)智能制造有限公司 | Inside constant temperature of control cabinet and new trend intelligence control system |
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| CN202141143U (en) * | 2011-06-28 | 2012-02-08 | 北京城建设计研究总院有限责任公司 | Water-cooling direct evaporative combined split-type air conditioner and air-conditioning system for urban rail transit |
| CN203132034U (en) * | 2013-03-26 | 2013-08-14 | 广东冠华机电工程有限公司 | High-accuracy constant-temperature and constant-humidity air conditioning device for laboratory |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113747769A (en) * | 2021-09-17 | 2021-12-03 | 玄铁(广州)智能制造有限公司 | Inside constant temperature of control cabinet and new trend intelligence control system |
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