CN204830289U - Carbon dioxide air conditioning system for building and contain this air conditioning system's building - Google Patents
Carbon dioxide air conditioning system for building and contain this air conditioning system's building Download PDFInfo
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- CN204830289U CN204830289U CN201520580624.5U CN201520580624U CN204830289U CN 204830289 U CN204830289 U CN 204830289U CN 201520580624 U CN201520580624 U CN 201520580624U CN 204830289 U CN204830289 U CN 204830289U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/40—Geothermal heat-pumps
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/54—Free-cooling systems
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Abstract
The utility model relates to a carbon dioxide air conditioning system for building and contain this air conditioning system's building. The utility model discloses a carbon dioxide air conditioning system for building, including indoor heat exchanger, carbon dioxide gas compressor, source heat exchanger and switching -over device, indoor heat exchanger, carbon dioxide gas compressor and ground source heat exchanger pass through the carbon dioxide cycle tube coupling and form circulation circuit, the setting of switching -over device is in the carbon dioxide cycle pipeline, indoor heat exchanger setting is in the building floor and/or in the wall body, ground source heat exchanger setting underground. The beneficial effects are that: utilize carbon dioxide with geothermol power perhaps cold heat circulate in the building, provide heat source or cold source through the thermal mode of radiative interchange, with low costs, low energy consumption, pollution -free, temperature uniformity good. Can not only practice thrift the space, indoor temperature distributes evenly moreover, and the room temperature is undulant little, does not have blow sense, noiseless, and human body comfort and energy -conserving benefit are better than conventional air conditioner.
Description
Technical field
The utility model relates to air-conditioning system field for building, particularly a kind of carbon dioxide air conditioning system for building and the building containing this air-conditioning system.
Background technology
At present, along with people are to the raising of living quality and indoor comfortable requirement degree, and the further raising of the development of building energy conservation and requirement, cause the drawback of traditional building air-conditioning system more and more obvious.In cold-producing medium, current air-conditioning system both domestic and external is all adopt freon as cold-producing medium, but freon can destroy atmospheric ozone layer, thus produces higher greenhouse effects.Due to the unstability of ammonia (R717) and also cost very high, refrigeration system can be made to there is unsafe factor, therefore ammonia (R717) is also not suitable as air-conditioning refrigerant.
In structure installment, conventional air conditioning system is water source type source pump or air-source formula source pump normally, be transported in tail-end blower fan coil pipe using water as refrigerating medium, required cold or heat is provided to building, there is air-conditioning duct and air outlet in flooring, in order to block air-conditioning water pipe, airduct, usually need to design suspended ceiling device, namely setting like this occupies a large amount of spaces, this too increases certain investment undoubtedly, also there is the problems such as noise is large, unit are energy consumption is high, system effectiveness is lower, and temperature distributing disproportionation is even.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provide that a kind of cost is low, low energy consumption, the carbon dioxide air conditioning system for building that pollution-free, uniform temperature is good.
A kind of carbon dioxide air conditioning system for building of the utility model, its technical scheme is:
A kind of carbon dioxide air conditioning system for building, comprise indoor heat exchanger, carbon-dioxide gas compressor, ground-coupled heat exchanger and reversing arrangement, indoor heat exchanger, carbon-dioxide gas compressor and ground-coupled heat exchanger are connected to form closed circuit by carbon dioxide recycle pipeline, reversing arrangement is arranged in carbon dioxide recycle pipeline, and indoor heat exchanger is arranged in building floor and/or in body of wall; Ground-coupled heat exchanger is arranged on underground.
A kind of carbon dioxide air conditioning system for building of the utility model, can also comprise following attached technical scheme:
Wherein, air-conditioning system realizes the exchange of cooling or heat supply by reversing arrangement.
Wherein, indoor heat exchanger is the heat exchanger tube be embedded in building floor and/or in body of wall; Indoor heat exchanger and ground-coupled heat exchanger can bear the pressure of 80bar ~ 120bar.
Wherein, ground-coupled heat exchanger be and calandria, U-tube body or helical tube body in any one or appoint several, be embedded in underground 20m ~ 80m.
Wherein, air-conditioning system utilizes carbon dioxide as unitary system cryogen; And comprise one or more carbon-dioxide gas compressor; The mass flow of carbon-dioxide gas compressor compression arbon dioxide is 0.5kg/s ~ 1.5kg/s.
Wherein, ground-coupled heat exchanger is embedded in frozen soil layer, and ground-coupled heat exchanger is stainless steel tube.
Wherein, the choke valve for reducing pressure by regulating flow is provided with in carbon dioxide recycle pipeline.
Wherein, reversing arrangement is the four-way change-over valve including a, b, c, d tetra-links, and a end of four-way change-over valve is connected with one end of carbon-dioxide gas compressor, and b end is connected with ground-coupled heat exchanger, c end is connected with the other end of carbon-dioxide gas compressor, and d end is connected with indoor heat exchanger.
Wherein, reversing arrangement is the multiple magnetic valves be arranged in carbon dioxide recycle pipeline.
The utility model additionally provides a kind of building, and its technical scheme is:
A kind of building, comprises above-mentioned one carbon dioxide air conditioning system for building.Carbon dioxide air conditioning system for building can be used for business, industry, civil buildings, such as market, office building, factory, apartment etc.
Explanation of nouns:
Indoor heat exchanger: be made up of the pipe group be arranged in the every floor plate of building, for the device heating to room or freeze.
Ground-coupled heat exchanger: be arranged on the heat exchanger under the frozen soil layer of ground, for carrying out the device of heat exchange with source, ground.
Trans critical cycle: system condensing temperature is higher than critical-temperature, and evaporating temperature is lower than the kind of refrigeration cycle of critical-temperature.
Subcritical cycle: the condensation temperature of system, evaporating temperature are all lower than the kind of refrigeration cycle of critical-temperature.
Bar is pressure unit, 1 bar (bar)=100 kPa (KPa)=10 newton/square centimeter=0.1MPa.
Enforcement of the present utility model comprises following technique effect:
One of the present utility model carbon dioxide air conditioning system for building, utilize carbon dioxide by underground heat (winter) or ground cold (summer) recycle heat in building, there is provided thermal source or low-temperature receiver by the mode of radiation exchange heat, cost is low, low energy consumption, pollution-free, uniform temperature good.Can not only save space, and indoor temperature distribution is even, indoor temperature fluctuation is little, without blowing feeling, noiseless, human body comfort and energy-saving benefit better than conventional air-conditioning.Adopt CO
2as the air-conditioning system of cold-producing medium, under identical refrigeration duty (or thermic load) condition, CO
2air-conditioning system can save energy up to 70%-80%.
One of the present utility model carbon dioxide air conditioning system for building, compared with conventional air conditioning system, has following advantage:
Conventional air conditioning system end adopts fan coil form, and energy consumption is higher, takes up room large, and end heat exchanger is embedded in every floor plate by the utility model, utilize armored concrete as conductor, outside distribute heat or cold, there is no energy ezpenditure, do not take space.
Conventional air conditioning system is water source type source pump or air-source formula source pump normally, and be transported in tail-end blower fan coil pipe using water as refrigerating medium, provide required cold or heat to building, system effectiveness is lower, and energy consumption is large.The application directly utilizes cold-producing medium CO
2as carrier, absorb cold or the heat of ground source, for the confession cold-peace heat supply in room, and end heat exchanger is embedded in every floor plate.Whole system is run simple, is convenient to management; And system only has compressor power consumption, and running efficiency of system is high, and energy consumption is low.Due to CO
2critical-temperature is lower, only has 31.06 DEG C, and during system trans critical cycle, efficiency is lower, and the application, by heat exchanger form in ground-coupled heat exchanger and floor, makes CO
2refrigeration system operates within the scope of subcritical cycle, greatly improves systemic circulation efficiency.And CO
2nature content is high, and wide material sources, cost is low, low price.Environmentally friendly (ODP=0, GWP=1), has good security, nontoxic, non-combustible, and refrigerating effect per unit swept volume is large, is 4 ~ 8 times of freon.
Accompanying drawing explanation
The one carbon dioxide air conditioning system schematic diagram for building that Fig. 1 provides for the utility model embodiment one
The one carbon dioxide air conditioning system schematic diagram for building that Fig. 2 provides for the utility model embodiment two
The floor construction schematic diagram being embedded with heat exchanger tube of the carbon dioxide air conditioning system a kind of for building that Fig. 3 provides for the utility model embodiment
1, carbon-dioxide gas compressor; 2, ground-coupled heat exchanger; 3, choke valve; 4, indoor heat exchanger; 5, four-way change-over valve; 6, the first magnetic valve; 7, the second magnetic valve; 8, the 3rd magnetic valve; 11, the 4th magnetic valve; 9, heat exchanger tube; 10, floor.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the utility model is described in detail, it is pointed out that described embodiment is only intended to be convenient to understanding of the present utility model, and any restriction effect is not play to it.
Embodiment 1
See the one carbon dioxide air conditioning system schematic diagram for building that Fig. 1 provides for the utility model the present embodiment, the one that the present embodiment provides carbon dioxide air conditioning system for building, comprise indoor heat exchanger 4, carbon-dioxide gas compressor 1, ground-coupled heat exchanger 2 and reversing arrangement, indoor heat exchanger 4, carbon-dioxide gas compressor 1 and ground-coupled heat exchanger 2 are connected to form closed circuit by carbon dioxide recycle pipeline, reversing arrangement is arranged in carbon dioxide recycle pipeline, and indoor heat exchanger 4 is arranged in building floor and/or in body of wall; Ground-coupled heat exchanger 2 is arranged on underground.The choke valve 3 for reducing pressure by regulating flow is also provided with, convenient adjustment in carbon dioxide recycle pipeline.Using ground, cold or underground heat, as low-temperature receiver or thermal source, and realizes the exchange of low-temperature receiver or thermal source to air-conditioning system by reversing arrangement.Indoor heat exchanger 4 is the heat exchanger tubes 9 be embedded in building floor and/or in body of wall.Be embedded in by end heat exchanger in every floor plate 10, utilize armored concrete as conductor, outside distribute heat or cold, do not have energy ezpenditure, do not take space.As preferably, ground-coupled heat exchanger 2 be and in calandria, U-tube body or helical tube body any one or appoint several, select according to actual needs; Ground-coupled heat exchanger 2 is embedded in the degree of depth of underground 20m ~ 80m, there is the place of frozen soil layer, is embedded in frozen soil layer, and ground-coupled heat exchanger 2 can be stainless steel tube.Air-conditioning system utilizes carbon dioxide as unitary system cryogen; And one or more carbon-dioxide gas compressor 1 can be comprised, in underground stainless steel tube and floor, the quantity (i.e. heat exchange area) of heat exchanger tube can be selected according to actual conditions.In order to ensure safety, indoor heat exchanger and ground-coupled heat exchanger can bear the pressure of 80bar ~ 120bar, preferred indoor heat exchanger and ground-coupled heat exchanger can bear the pressure of 90bar ~ 110bar, and concrete numerical value can select 80bar, 90bar, 95bar, 100bar, 110bar, 120bar.In order to ensure refrigeration or heating effect, the mass flow of carbon-dioxide gas compressor compression arbon dioxide is 0.5kg/s ~ 1.5kg/s, the mass flow of preferably carbon dioxide compressor compresses carbon dioxide is 0.7kg/s ~ 1.2kg/s, and concrete numerical value can select 0.5kg/s, 0.7kg/s, 1.0kg/s, 1.1kg/s, 1.2kg/s, 1.3kg/s, 1.5kg/s.Namely the restriction of above-mentioned numerical value can ensure unit operation safety, can ensure again to have good refrigeration or heating effect.
In the present embodiment, reversing arrangement is the four-way change-over valve 5 including a, b, c, d tetra-links, the a end of four-way change-over valve is connected with one end of carbon-dioxide gas compressor 1, b end is connected with ground-coupled heat exchanger 2, c end is connected with the other end of carbon-dioxide gas compressor 1, and d end is connected with indoor heat exchanger 4.
The present embodiment is applied to air-conditioning system, and its principle as shown in Figure 1.During room cooling in summer, indoor heat exchanger is as evaporimeter, and ground-coupled heat exchanger is as condenser, and four-way change-over valve a, b are communicated with, and c, d are communicated with; Its circulation process is as follows: compressor sucks the low-pressure gas of flash-pot (indoor heat exchanger), the refrigerant gas of HTHP is compressed into through compressor, be drained into condenser (ground-coupled heat exchanger) and be condensed into low-temperature refrigerant liquid, the refrigerant liquid be condensed flows through choke valve and is entered evaporimeter (indoor heat exchanger) after reducing pressure by regulating flow, in evaporimeter (indoor heat exchanger), absorb surrounding environment heat of vaporization become high temperature refrigerant gas, sucked by compressor, thus complete a kind of refrigeration cycle.
During room heat supply in winter, indoor heat exchanger is as condenser, and ground-coupled heat exchanger is as evaporimeter, and four-way change-over valve a, d are communicated with, and b, c are communicated with.Its circulation process is as follows: compressor sucks the low-pressure gas of flash-pot (ground-coupled heat exchanger), the refrigerant gas of HTHP is compressed into through compressor, be drained into condenser (indoor heat exchanger) and be condensed into low-temperature refrigerant liquid, the refrigerant liquid be condensed flows through choke valve and is entered evaporimeter (ground-coupled heat exchanger) after reducing pressure by regulating flow, in evaporimeter (ground-coupled heat exchanger), absorb surrounding environment heat of vaporization become high temperature refrigerant gas, sucked by compressor, thus complete one and heat circulation.
Embodiment 2
See the one carbon dioxide air conditioning system schematic diagram for building that Fig. 2 provides for the utility model the present embodiment, the present embodiment is supplied to the reversing arrangement of another kind of structure, reversing arrangement comprises the first magnetic valve 6, second magnetic valve 7, the 3rd magnetic valve 8 and the 4th magnetic valve 11, and connected mode as shown in Figure 2.The present embodiment is applied to air-conditioning system, and its principle as shown in Figure 2.During cooling in summer, indoor heat exchanger is evaporimeter, and ground-coupled heat exchanger is condenser, and the first magnetic valve 6, the 3rd magnetic valve 8 are closed, and the second magnetic valve 7 and the energising of the 4th magnetic valve 11 are opened, and realize kind of refrigeration cycle.During winter heating, indoor heat exchanger is condenser, and ground-coupled heat exchanger is evaporimeter, and the first magnetic valve 6, the 3rd magnetic valve 8 energising are opened, and the second magnetic valve 7 and the 4th magnetic valve 11 are closed, and realize heating circulation.Other structure of the carbon dioxide air conditioning system a kind of for building that the present embodiment provides is identical with embodiment 1, repeats no more herein.
Adopt CO
2as the air-conditioning system of cold-producing medium, under identical refrigeration duty (or thermic load) condition, CO
2air-conditioning system can save energy up to 70%-80%.
With summer refrigeration duty for 500KW and winter thermic load calculate respectively for 500KW.
Adopt CO
2cold-producing medium, during summer operation, calculate signal according to compressor Selection Software, the system conditions of calculating is: power supply is selected: 50HZ-400V, the compressor model selected is HGX46/345-4SHCO
2t, motor: 380-420VY/YY-3-50HZPW, is drawn through hot 15K, cold-producing medium R744, evaporating temperature 15 DEG C, evaporating pressure 50.87bar, condensation temperature 25 DEG C, condensing pressure 64.34bar.Operational factor is: single compressor refrigerating capacity (evaporator capacity) Q=184KW, single compressor consumed power is 17.1, current drain is 45.20A (400V), refrigerating efficiency (coefficient of refrigerating performance) COP=10.8, condenser heat rejection amount 201KW, mass flow 1.049kg/s, discharge end temperature 51 DEG C.Because this system compresses engine efficiency is system effectiveness, power consumption is 46.3KW (consumed powers of 2.7 compressor * 17.1) needed for the conversion 500KW refrigeration duty.
Adopt CO
2cold-producing medium, during winter operation, signal is calculated: the system conditions of calculating is: power supply is selected: 50HZ-400V according to compressor Selection Software, motor: 380-420VY/YY-3-50HZPW, is drawn through hot 15K, cold-producing medium R744, evaporating temperature 10 DEG C, evaporating pressure 45.02bar, condensation temperature 28 DEG C, condensing pressure 68.92bar.Operational factor is: single compressor heating capacity Q=169KW (being condenser heat rejection amount), heating efficiency (heating efficiency) COP=7.19, compressor refrigerating capacity (evaporator capacity) 145KW, consumed power 23.5KW, current drain is 51.30A (400V), mass flow 0.892kg/s, discharge end temperature 62.1 DEG C.Because this system compresses engine efficiency is system effectiveness, power consumption is 69.5KW (consumed powers of 2.96 compressor * 23.5) needed for the conversion 500KW thermic load.
Traditional air-conditioning system power consumption is higher, for the Worm type air-cooled source pump 30XQ500 of Carrier, during nominal refrigerating capacity 500KW, and energy consumption of compressor 134.3KW; During name heating capacity 500KW, energy consumption of compressor 139.1KW.Consider that water pump, blower fan and tail-end blower fan coil pipe energy consumption are about 50KW.
The relatively CO of traditional air conditioner and the present embodiment
2air conditioner system energy saving effect is as follows:
During cooling in summer, during nominal refrigerating capacity 500KW, traditional air conditioner needs power consumption 184.3KW, CO
2air-conditioner power consumption is 46.3KW, therefore adopts CO
2air-conditioning system can save energy consumption 138KW;
During winter heating, during nominal heating capacity 500KW, traditional air conditioner needs power consumption 189.1KW, CO
2air-conditioner power consumption is 69.5KW, adopts CO
2air-conditioning system can save energy consumption 119.6KW.
The CO of applicant's trial-production
2air-conditioning system reaches the effect of more energy-conservation than traditional air conditioner 70% ~ 80%.
The utility model also provides a kind of building comprising carbon dioxide air conditioning system a kind of for building described in above-described embodiment, the structure and working principle of building is technology well known in the art, and the improvement of building that the utility model provides only relates to above-mentioned carbon dioxide air conditioning system for building, does not change other parts.Therefore this description only describes in detail carbon dioxide air conditioning system for building, the miscellaneous part of building and operation principle are repeated no more here.In the content basis that those skilled in the art describe at this description, building of the present utility model can be realized.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model; but not the restriction to the utility model protection domain; although done to explain to the utility model with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to the technical solution of the utility model or equivalent replacement, and not depart from essence and the scope of technical solutions of the utility model.
Claims (10)
1. a carbon dioxide air conditioning system for building, comprise indoor heat exchanger, carbon-dioxide gas compressor, ground-coupled heat exchanger and reversing arrangement, it is characterized in that: described indoor heat exchanger, described carbon-dioxide gas compressor and described ground-coupled heat exchanger are connected to form closed circuit by carbon dioxide recycle pipeline, described reversing arrangement is arranged in described carbon dioxide recycle pipeline, and described indoor heat exchanger is arranged in building floor and/or in body of wall; Described ground-coupled heat exchanger is arranged on underground.
2. one according to claim 1 carbon dioxide air conditioning system for building, is characterized in that: described air-conditioning system realizes the exchange of cooling or heat supply by described reversing arrangement.
3. one according to claim 1 carbon dioxide air conditioning system for building, is characterized in that: described indoor heat exchanger is the heat exchanger tube be embedded in building floor and/or in body of wall; Described indoor heat exchanger and described ground-coupled heat exchanger can bear the pressure of 80bar ~ 120bar.
4. one according to claim 1 carbon dioxide air conditioning system for building, is characterized in that: described ground-coupled heat exchanger be and calandria, U-tube body or helical tube body in any one or appoint several.
5. one according to claim 1 carbon dioxide air conditioning system for building, is characterized in that: described air-conditioning system utilizes carbon dioxide as unitary system cryogen, and comprises one or more carbon-dioxide gas compressor; The mass flow of described carbon-dioxide gas compressor compression arbon dioxide is 0.5kg/s ~ 1.5kg/s.
6. one according to claim 1 carbon dioxide air conditioning system for building, it is characterized in that: described ground-coupled heat exchanger is embedded in the degree of depth of underground 20m ~ 80m, described ground-coupled heat exchanger is stainless steel tube.
7. one according to claim 1 carbon dioxide air conditioning system for building, is characterized in that: be provided with the choke valve for reducing pressure by regulating flow in described carbon dioxide recycle pipeline.
8. according to the arbitrary described one carbon dioxide air conditioning system for building of claim 1 ~ 7, it is characterized in that: described reversing arrangement is the four-way change-over valve including a, b, c, d tetra-links, the a end of described four-way change-over valve is connected with one end of described carbon-dioxide gas compressor, b end is connected with described ground-coupled heat exchanger, c end is connected with the other end of described carbon-dioxide gas compressor, and d end is connected with described indoor heat exchanger.
9., according to the arbitrary described one carbon dioxide air conditioning system for building of claim 1 ~ 7, it is characterized in that: described reversing arrangement is the multiple magnetic valves be arranged in carbon dioxide recycle pipeline.
10. a building, is characterized in that: comprise the arbitrary described one carbon dioxide air conditioning system for building of claim 1 ~ 9.
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| CN201520580624.5U CN204830289U (en) | 2015-08-04 | 2015-08-04 | Carbon dioxide air conditioning system for building and contain this air conditioning system's building |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066498A (en) * | 2015-08-04 | 2015-11-18 | 北京市京科伦冷冻设备有限公司 | Carbon dioxide air conditioning system for building and building with air conditioning system |
| CN106123397A (en) * | 2016-07-05 | 2016-11-16 | 天津霍斯沃明节能技术有限公司 | A kind of carbon dioxide heat pump system for xeothermic well |
| CN111023674A (en) * | 2019-12-30 | 2020-04-17 | 北京市京科伦冷冻设备有限公司 | Constant temperature and humidity three-dimensional warehouse |
| CN113551320A (en) * | 2021-07-28 | 2021-10-26 | 郑州瑞邦精密机械制造有限公司 | Radiation heat transfer type central air conditioning device with composite bamboo wallboard |
-
2015
- 2015-08-04 CN CN201520580624.5U patent/CN204830289U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066498A (en) * | 2015-08-04 | 2015-11-18 | 北京市京科伦冷冻设备有限公司 | Carbon dioxide air conditioning system for building and building with air conditioning system |
| CN106123397A (en) * | 2016-07-05 | 2016-11-16 | 天津霍斯沃明节能技术有限公司 | A kind of carbon dioxide heat pump system for xeothermic well |
| CN111023674A (en) * | 2019-12-30 | 2020-04-17 | 北京市京科伦冷冻设备有限公司 | Constant temperature and humidity three-dimensional warehouse |
| CN111023674B (en) * | 2019-12-30 | 2021-09-14 | 北京市京科伦冷冻设备有限公司 | Constant temperature and humidity three-dimensional warehouse |
| CN113551320A (en) * | 2021-07-28 | 2021-10-26 | 郑州瑞邦精密机械制造有限公司 | Radiation heat transfer type central air conditioning device with composite bamboo wallboard |
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