CN100394115C - Heat pipe cold accumulating air conditioning device - Google Patents
Heat pipe cold accumulating air conditioning device Download PDFInfo
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- CN100394115C CN100394115C CNB2006100860766A CN200610086076A CN100394115C CN 100394115 C CN100394115 C CN 100394115C CN B2006100860766 A CNB2006100860766 A CN B2006100860766A CN 200610086076 A CN200610086076 A CN 200610086076A CN 100394115 C CN100394115 C CN 100394115C
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- cold
- heat pipe
- storage
- evaporator
- air conditioning
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- 238000004378 air conditioning Methods 0.000 title claims description 25
- 238000009833 condensation Methods 0.000 claims abstract description 5
- 230000005494 condensation Effects 0.000 claims abstract description 5
- 230000008676 import Effects 0.000 claims description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000010962 carbon steel Substances 0.000 claims description 2
- 239000011152 fibreglass Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000011150 reinforced concrete Substances 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 14
- 238000001704 evaporation Methods 0.000 abstract description 12
- 230000008020 evaporation Effects 0.000 abstract description 12
- 239000003507 refrigerant Substances 0.000 abstract description 8
- 238000009825 accumulation Methods 0.000 abstract description 6
- 239000002826 coolant Substances 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000010521 absorption reaction Methods 0.000 description 11
- 238000005057 refrigeration Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 7
- 239000012266 salt solution Substances 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000002309 gasification Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 201000009240 nasopharyngitis Diseases 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Images
Classifications
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Other Air-Conditioning Systems (AREA)
Abstract
This invention discloses a kind of heat pipe cooling accumulator air conditioner device. Indoor machine set is composed of fan and heat exchanging coil pipe; for outdoor machine set, upside condensation segment of heat pipe is positioned in evaporator, while the underside evaporation segment in the cooling accumulating tank which is filled with cooling medium; the inlet of compressor respectively connects to the outlets of evaporator using for air conditioner and cooling accumulation, while the outlet to the inlet of condenser; the outlet of condenser respectively connects to the inlets of evaporator using for air conditioner and cooling accumulation through magnetic valve and stop valve; indoor machine set respectively connects to the inlets of evaporator using for air conditioner and cooling accumulating tank through magnetic valve; the evaporator using for air conditioner and cooling accumulating tank all connect to the inlet of circulating pump through magnetic valve; the outlet of circulating pump connects to indoor machine set. This invention has short pipeline. It avoids decreasing of refrigerants pressure.
Description
Technical field
The present invention relates to a kind of refrigeration air-conditioner, specifically a kind of heat pipe cold accumulating air conditioning device.
Background technology
Since reform and opening-up, the overall national strength and the living standards of the people of China all are greatly increased.Energy industry has obtained tremendous development as one of basic industry of national economy.But the needs of fast development of national economy and the sharp increase of people's lives usefulness energy are not still satisfied in the development of energy industry, and national energy scarcity situation still exists.
Solve present energy scarcity problem, can set about from two aspects: the one, exploitation regenerative resource (as solar energy, biomass energy, wind energy, ocean energy etc.), the 2nd, save the existing energy that uses.China's efficiency of energy utilization is lower 10 percentage points than international most advanced level.Using energy source intermediate link (processing, conversion and accumulating) loss amount is big, and waste is serious.China's efficiency of energy utilization and external gap show that energy-saving potential is huge.According to units concerned's research, press energy consumption of unit product and terminal and compare with energy equipment energy consumption and international most advanced level, the energy-saving potential of China is about 300,000,000 tons of standard coals at present.
Because the supply and demand of the energy quantitatively with on the time can not mate and coordinate well, causes a large amount of energy wastes.Cause electric energy to waste as the valley power surplus, and peak period electric power is not enough.Adopt cool storage air conditioning technology to address this problem well, the energy is rationally used.
Energy accumulation air conditioner is electrical network low ebb time at night (also being the very low time of air conditioner load simultaneously), the refrigeration unit start is freezed and by cold-storage apparatus cold is stored, treat electrical network peak Elapsed Time on daytime (also being air conditioner load rush hour simultaneously), again cold is discharged the needs that satisfy the peak air conditioner load.Like this, most of power consumption of refrigeration system occurs in the low power consumption phase at night, and by day peak times of power consumption have only auxiliary equipment in operation, thereby realize power load " peak load shifting ".
For encouraging user's peak load shifting, power department has been formulated the time-of-use tariffs policy, and peak electricity tariff and low ebb electricity price are drawn back, and makes the 1/3-1/5 of the only suitable peak electricity tariff of low ebb electricity price, encourages the user to use the low ebb electricity, and this policy comes into effect in China.
Under the situation of power supply shortage, because the enforcement of time-of-use tariffs policy, for cool storage air conditioning technology provides vast potential for future development.
Present cold accumulation air-conditioner mainly adopts water cold-storage and ice cold-storage.The water cold-storage is that the sensible heat that utilizes cold water to be stored in the cold-storage groove carries out cold-storage, and the water at low temperature of promptly making 4 ℃-7 ℃ night is for the idle call on daytime, and this temperature is suitable for most conventional air conditioner refrigerating unit and directly produces cold water.The capacity of water cold-storage and efficient depend on confession, the backwater temperature difference of cold-storage groove, and for the effective layering of, return water temperature at interval.Because of the heat of fusion of specific heat of water, so the storage density of cold of water cold-storage is low, need the bigger cold-storage groove of volume, and cold consumption is big, insulation and water-proofing treatment trouble much smaller than ice.
The ice cold-storage is to utilize the latent heat of phase change of ice to carry out the cold storage, has the big advantage of storage density of cold.The cold-storage temperature of ice-storage system is almost constant, and the water temperature in its cold-storage groove can drop to 0 ℃, thereby the air conditioner system air blast temperature can hang down and reach 4-7 ℃, and system compares with conventional air-conditioning, and identical cold is provided, and the wind pushing air amount can reduce about 40%.But what common ice-storage air-conditioning flowed in hold-over coil is low temperature refrigerating mediums such as salt solution or ethylene glycol solution, need be circulated by pump, shortcomings such as refrigerant pressure reduction that existence causes owing to cold-producing medium direct evaporation system pipeline is long and oil return difficulty; In addition, also there is corrosivity in liquid low temperature refrigerating medium (as salt solution or ethylene glycol solution etc.) to the pipeline of system.
Summary of the invention
In order to overcome the deficiency of existing aircondition, the object of the present invention is to provide a kind of heat pipe cold accumulating air conditioning device.This device is when cold-storage, cooling, and its storage density of cold is than chilled water storage system height; Can save the low temperature refrigerating medium circulatory system during cold-storage, it is long and refrigerant pressure that cause reduces and shortcoming such as oil return difficulty to have overcome cold-producing medium direct evaporation system pipeline; In addition, because heat pipe isothermal high speed transfer heat makes the ice-reserving speed on heat pipe surface even, the good refrigeration effect of air-conditioning.
The objective of the invention is to be achieved through the following technical solutions:
A kind of heat pipe cold accumulating air conditioning device comprises indoor units and outdoor unit, and indoor units is made up of blower fan and heat exchange coil; Outdoor unit comprises compressor, condenser, idle call choke valve, evaporator using for air and circulating pump, it is characterized in that: described outdoor unit also comprises cold-storage choke valve, cold-storage evaporimeter, heat pipe and cold-storage groove, the top condensation segment of heat pipe places cold-storage with in the evaporimeter, and the bottom evaporator section places in the cold-storage groove that cool storage medium is housed; Outlet with evaporimeter is connected with cold-storage with evaporator using for air respectively in the import of compressor, and the outlet of compressor is connected with the import of condenser; Import with evaporimeter is connected with cold-storage with evaporator using for air with choke valve by magnetic valve respectively in the outlet of condenser; Indoor units is connected by the import of magnetic valve with evaporator using for air and cold-storage groove respectively; Evaporator using for air all is connected with inlet of circulating pump by magnetic valve with cold-storage groove; Outlet of circulating pump is connected with indoor units.
Among the present invention, the cool storage medium in the cold-storage groove can be a water.
Described condenser is air-cooled condenser or water-cooled condenser.
Described choke valve is heating power expansion valve or electric expansion valve.
Described heat pipe is made by metal material, can be carbon steel, stainless steel or copper.
Working media in the heat pipe of the present invention is ammonia or freon, can save the circulatory system of using low temperature refrigerating medium (as salt solution or ethylene glycol solution etc.) and needing during cold-storage.
For making the work best results of heat pipe, radiating fin all is equipped with in the top of described heat pipe, bottom, and fin can adopt steel disc, aluminium flake or copper sheet, and the shape of fin can be plain film, corrugated plate or bar seam sheet.
Described cold-storage groove is cuboid or cylinder.
Described cold-storage groove is steel, fiberglass or reinforced concrete structure.
Indoor units can as required be organized parallel connection more among the present invention, and the present invention uses cool storage air conditioning technology, can enlarge the air conditioning area usable floor area, the electric power cost that reduces air conditioner kludge capacity, saves air conditioner user; Simultaneously, can realize the effect of peak load shifting, balancing electric power load.The present invention adopts heat pipe to substitute the hold-over coil in the cold-storage groove in the common cold accumulation air-conditioner, and the working media in the heat pipe is ammonia or freon, utilizes the hot gas rising characteristic, can realize the heat exchange circulation automatically; And what flow in the hold-over coil in the cold-storage groove in the common cold accumulation air-conditioner is liquid low temperature refrigerating medium (as salt solution or ethylene glycol solution etc.), thereby, realize the heat exchange circulation for making the low temperature refrigerating medium, must adopt kinetic pump to finish circulation.In addition, also there is corrosivity in liquid low temperature refrigerating medium (as salt solution or ethylene glycol solution etc.) to the pipeline of system.
Compared with prior art, the present invention can save low temperature refrigerating medium (as salt solution or the ethylene glycol solution etc.) circulatory system, the refrigerant pressure reduction that has overcome cold-producing medium direct evaporation system pipeline length and caused and the shortcoming of oil return difficulty have solved common ice chilling air conditioning system corrosion of piping problem; Simultaneously, the present invention is because heat pipe isothermal high speed transfer heat makes the ice-reserving speed on heat pipe surface even, the good refrigeration effect of air-conditioning.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
The specific embodiment
A kind of heat pipe cold accumulating air conditioning device of the present invention comprises indoor units 1, outdoor unit 2, compressor 21, condenser 22, idle call choke valve 231, cold-storage choke valve 232, magnetic valve 241,242,243,244,245,246, evaporator using for air 25, cold-storage evaporimeter 26, heat pipe 27, cold-storage groove 28, circulating pump 29.Device for drying and filtering, gas-liquid separator, electronic control part have been omitted in the accompanying drawing.Indoor units 1 can as required be organized in parallel more, and the one group of indoor units 1 of only drawing among the figure is illustrated.
When carrying out conventional air conditioner refrigerating circulation time, magnetic valve 242,244,246 cuts out, and magnetic valve 241,243,245 is opened.Cold-producing medium is discharged by compressor 21 compression backs, flow to condenser 22 and emit heat, condensed refrigerant liquid carries out the throttling step-down through idle call choke valve 231, cold-producing medium after the step-down evaporates heat absorption and produces refrigeration effect in evaporator using for air 25, the cold-producing medium after the evaporation gasification is inhaled into compressor 21.Simultaneously, the refrigerating medium (water) of circulation is lowered the temperature because of the heat absorption of the cold-producing medium in the evaporimeter 25 between indoor units 1 and evaporator using for air 25, refrigerating medium after the cooling is sent in the heat exchange coil of indoor units 1 by circulating pump 29, and carry out heat exchange with indoor air, indoor air themperature is reduced.
When carrying out cold-storage circulation time (power load low ebb phase at night), magnetic valve 241,243,244,245,246 cuts out, and magnetic valve 242 is opened.Cold-producing medium is discharged by compressor 21 compression backs, flow to condenser 22 and emit heat, condensed refrigerant liquid carries out the throttling step-down through cold-storage with choke valve 232, cold-producing medium after the step-down produces refrigeration effect at cold-storage with evaporation heat absorption in the evaporimeter 26, and the cold-producing medium after the evaporation gasification is inhaled into compressor 21.Simultaneously, the bottom of heat pipe 27 (evaporator section) ice making of in cold-storage groove, absorbing heat, the top of heat pipe 27 (condensation segment) and cold-storage carry out heat exchange and heat release with evaporimeter 26 interior cold-producing mediums.Working media in the heat pipe flows to heat pipe condenser section in evaporator section heat absorption evaporation through span line, and condensate liquid is sent evaporator section back to by the imbibition core and circulated once more.
When carrying out refrigeration and cold-storage circulation time, magnetic valve 244,246 cuts out, and magnetic valve 241,242,243,245 is opened.Cold-producing medium is discharged by compressor 21 compression backs, flow to condenser 22 and emit heat, condensed refrigerant liquid is divided into two-way, one the tunnel carries out the throttling step-down through idle call choke valve 231, cold-producing medium after the step-down evaporates heat absorption and produces refrigeration effect in evaporator using for air 25, the cold-producing medium after the evaporation gasification is inhaled into compressor 21; Simultaneously, the refrigerating medium (water) of circulation is lowered the temperature because of the heat absorption of the cold-producing medium in the evaporimeter 25 between indoor units 1 and evaporator using for air 25, refrigerating medium after the cooling is sent in the heat exchange coil of indoor units by circulating pump 29, and carry out heat exchange with indoor air, indoor air themperature is reduced.Another road is carried out the throttling step-down through cold-storage with choke valve 232, and the cold-producing medium after the step-down produces refrigeration effect at cold-storage with evaporation heat absorption in the evaporimeter 26, and the cold-producing medium after the evaporation gasification is inhaled into compressor 21; Simultaneously, the bottom of heat pipe 27 (evaporator section) ice making of in cold-storage groove, absorbing heat, the top of heat pipe 27 (condensation segment) and cold-storage carry out heat exchange and heat release with evaporimeter 26 interior cold-producing mediums.
When carrying out by the independent cooling of cold-storage groove 28 (power load peak period on daytime), magnetic valve 241,242,243,245 cuts out, magnetic valve 244,246 unlatchings.The refrigerating medium (water) of circulation is lowered the temperature because of the heat absorption of the ice-out in the cold-storage groove 28 between indoor units and cold-storage groove 28, refrigerating medium after the cooling is sent in the heat exchange coil of indoor units 1 by circulating pump 29, and carry out heat exchange with indoor air, indoor air themperature is reduced.
When carrying out by air conditioner refrigerating unit and cold-storage groove associating cooling, magnetic valve 242 cuts out, and magnetic valve 241,243,245,244,246 is opened.Cold-producing medium is discharged by compressor 21 compression backs, flow to condenser 22 and emit heat, condensed refrigerant liquid carries out the throttling step-down through idle call choke valve 231, cold-producing medium after the step-down evaporates heat absorption and produces refrigeration effect in evaporator using for air 25, the cold-producing medium after the evaporation gasification is inhaled into compressor 21; Simultaneously, the refrigerating medium (water) of circulation is lowered the temperature because of the heat absorption of the cold-producing medium in the evaporimeter 25 between indoor units and evaporator using for air 25, refrigerating medium after the cooling is sent in the heat exchange coil of indoor units 1 by circulating pump 29, and carry out heat exchange with indoor air, indoor air themperature is reduced.In addition, the refrigerating medium (water) of circulation is also lowered the temperature because of the heat absorption of the ice-out in the cold-storage groove 28 between indoor units and cold-storage groove 28, refrigerating medium after the cooling is sent in the heat exchange coil of indoor units 1 by circulating pump 29, and carries out heat exchange with indoor air, and indoor air themperature is reduced.
Claims (10)
1. a heat pipe cold accumulating air conditioning device comprises indoor units (1) and outdoor unit (2), and indoor units (1) is made up of blower fan and heat exchange coil; Outdoor unit (2) comprises compressor (21), condenser (22), idle call choke valve (231), evaporator using for air (25) and circulating pump (29), it is characterized in that: described outdoor unit (2) also comprises cold-storage choke valve (232), cold-storage evaporimeter (26), heat pipe (27) and cold-storage groove (28), the top condensation segment of heat pipe (27) places cold-storage with in the evaporimeter (26), and the bottom evaporator section places in the cold-storage groove (28) that cool storage medium is housed; Outlet with evaporimeter (26) is connected with cold-storage with evaporator using for air (25) respectively in the import of compressor (21), and the outlet of compressor (21) is connected with the import of condenser (22); Import with evaporator using for air (25) is connected with idle call choke valve (231) by first magnetic valve (241) in the outlet of condenser (22); The outlet of condenser (22) simultaneously also is connected with the import of cold-storage with evaporimeter (26) with choke valve (232) with cold-storage by second magnetic valve (242); Indoor units (1) is connected with the import of evaporator using for air (25) by the 3rd magnetic valve (243); Indoor units (1) is connected with the import of cold-storage groove (28) by the 4th magnetic valve (244) simultaneously; Evaporator using for air (25) is connected with the import of circulating pump (29) by the 5th magnetic valve (245); Cold-storage groove (28) is connected with the import of circulating pump (29) by the 6th magnetic valve (246); The outlet of circulating pump (29) is connected with indoor units (1).
2. heat pipe cold accumulating air conditioning device according to claim 1 is characterized in that: described condenser (22) is any one in air-cooled condenser or the water-cooled condenser.
3. heat pipe cold accumulating air conditioning device according to claim 1 is characterized in that: described idle call choke valve (231) and cold-storage are in heating power expansion valve or the electric expansion valve any one with choke valve (232).
4. heat pipe cold accumulating air conditioning device according to claim 1 is characterized in that: described heat pipe (27) is become by carbon steel, stainless steel or copper.
5. heat pipe cold accumulating air conditioning device according to claim 1 is characterized in that: the working media in the described heat pipe (27) is any one in ammonia or the freon.
6. heat pipe cold accumulating air conditioning device according to claim 1 is characterized in that: radiating fin all is equipped with in top, the bottom of described heat pipe (27).
7. heat pipe cold accumulating air conditioning device according to claim 6 is characterized in that: the radiating fin of described heat pipe (27) is to be made by in steel disc, aluminium flake or the copper sheet any one.
8. heat pipe cold accumulating air conditioning device according to claim 6 is characterized in that: the radiating fin of described heat pipe (27) is to be made by in plain film, corrugated plate or the bar seam sheet any one.
9. heat pipe cold accumulating air conditioning device according to claim 1 is characterized in that: described cold-storage groove (28) is any one in cuboid or the cylinder.
10. heat pipe cold accumulating air conditioning device according to claim 1 is characterized in that: described cold-storage groove (28) is any one in steel, fiberglass or the reinforced concrete structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100860766A CN100394115C (en) | 2006-07-24 | 2006-07-24 | Heat pipe cold accumulating air conditioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100860766A CN100394115C (en) | 2006-07-24 | 2006-07-24 | Heat pipe cold accumulating air conditioning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1888639A CN1888639A (en) | 2007-01-03 |
| CN100394115C true CN100394115C (en) | 2008-06-11 |
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| CNB2006100860766A Expired - Fee Related CN100394115C (en) | 2006-07-24 | 2006-07-24 | Heat pipe cold accumulating air conditioning device |
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| CN (1) | CN100394115C (en) |
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| CN100432557C (en) * | 2007-01-25 | 2008-11-12 | 南京大学 | Air condition system of heat pipe storing energy |
| CN102261706A (en) * | 2011-05-27 | 2011-11-30 | 南京师范大学 | Natural cold source multi-temperature-level cold accumulation system based on heat pipe |
| CN104132414B (en) * | 2014-08-15 | 2016-09-28 | 上海新祁环境科技有限公司 | Air-cooled heat pipe cold water air-conditioning system |
| CN106931586A (en) * | 2015-12-31 | 2017-07-07 | 中国移动通信集团甘肃有限公司 | A kind of temprature control method of network data center, apparatus and system |
| CN106225127A (en) * | 2016-08-30 | 2016-12-14 | 西北工业大学 | A kind of small-sized ice cold-storage temperature regulation fan system |
| CN108180580B (en) * | 2018-02-13 | 2024-02-09 | 南京工程学院 | Air conditioning system with cross-season energy storage function |
| CN109579197A (en) * | 2019-01-14 | 2019-04-05 | 张晓庆 | Mobile air conditioner and its refrigerating method |
| CN109945364A (en) * | 2019-03-25 | 2019-06-28 | 珠海格力电器股份有限公司 | Air-conditioning and its control method |
| CN110145883A (en) * | 2019-05-23 | 2019-08-20 | 青岛澳柯玛智慧冷链有限公司 | A kind of multi-stage heat exchanger water cooling system for built-in showcase |
| CN110145894A (en) * | 2019-05-23 | 2019-08-20 | 青岛澳柯玛智慧冷链有限公司 | A kind of multi-stage heat exchanger absorption refrigeration cooling system for built-in showcase |
| CN110848852B (en) * | 2019-11-29 | 2021-10-26 | 广东美的制冷设备有限公司 | Air conditioner and control method and control device thereof |
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| CN1888639A (en) | 2007-01-03 |
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