CN103743143A - Air conditioning refrigerating device - Google Patents
Air conditioning refrigerating device Download PDFInfo
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- CN103743143A CN103743143A CN201310731231.5A CN201310731231A CN103743143A CN 103743143 A CN103743143 A CN 103743143A CN 201310731231 A CN201310731231 A CN 201310731231A CN 103743143 A CN103743143 A CN 103743143A
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Abstract
An air conditioning refrigerating device comprises a high back pressure rotary compressor; an outlet of the high back pressure rotary compressor is connected with an inlet of a condenser; an outlet of the condenser is connected with a liquid inlet of a heat regenerator; the liquid outlet of the heat regenerator is connected with an inlet of a swelling valve; an outlet of the swelling valve is connected with an inlet of an evaporator; an outlet of the evaporator is connected with an air inlet of the heat regenerator; an air outlet of the heat regenerator is connected with an inlet of the high back pressure rotary compressor. According to the air conditioner refrigerating device, refrigerant firstly enters into the high back pressure rotary compressor, enters into the compressor after being compressed into high temperature high pressure air, then is condensed into intermediate temperature high temperature liquid and discharges heat to the air; the refrigerant then flows through the heat regenerator to enter into the swelling valve to be throttled to be in a low temperature low pressure air-liquid mixed state; then the refrigerant enters into the evaporator to change heat with the air in the environment to enable the air temperature to be reduced; accordingly the refrigerating effect is achieved. The air conditioner refrigerating device has the advantages of improving the compressor efficiency and a refrigeration coefficient of a refrigeration system and being good in lubricating oil return.
Description
Technical field
The present invention relates to refrigeration technology field, be specifically related to the air-conditioning refrigeration plant with regenerator.
Background technology
Because CFCs (fluorochlorohydrocarbon) and HCFCs (hydrogen fluorohydrocarbon) cold-producing medium have destruction to ozone layer, therefore the cold-producing medium originally generally using in field of Refrigeration and Air-conditioning has been eliminated or will be progressively eliminated, the cold-producing medium extensively adopting in field of Refrigeration and Air-conditioning now has R134a (freon HFC134a), and HFC mixture refrigerant R404A, R407C, R410A etc., in the molecule of these cold-producing mediums, contain hydrogen, fluorine, not chloride, do not damage the ozone layer, but there are very high greenhouse effects, day by day serious along with global warming trend, these alternative refrigerants are also faced with the situation of eliminating out refrigerating field.And carbon-hydrogen refrigerant, for example R290(propane), R1270 (propylene) do not destroy completely to ozone layer, and greenhouse effects are also very little, the real cold-producing medium that belongs to current environmental protection.Therefore, carbon-hydrogen refrigerant is a kind of desirable refrigerant alternative.
The air-conditioning refrigeration plant of current domestic employing carbon-hydrogen refrigerant is generally comprised of compressor, condenser, expansion valve and evaporimeter.When work, the low-pressure steam of refrigerating plant inner refrigerant is inhaled into compressor, and then the steam of boil down to HTHP drain into condenser.In condenser, outdoor air and cold-producing medium generation heat transmit, and take away cold-producing medium liberated heat, and cold-producing medium is warm highly pressurised liquid from high temperature and high pressure steam becomes.Through expansion valve, throttling enters evaporimeter to middle temperature high pressure liquid refrigerant, evaporates and draw the heat of surrounding air.Cold-producing medium becomes low-temp low-pressure gas inflow compressor subsequently.
Wherein, the domestic compressor major part adopting in said system is at present piston type or scroll compressor, and compressor lubrication oil sump is under admission pressure.For the rotary compressor (also claiming compressor with rolling rotor, rolling piston compressor) of high back pressure, domestic employing less.
When adopting rotary compressor, the refrigerator oil of compressor can be selected mineral oil or artificial oil, and because artificial oil cost is higher, therefore mineral oil can be preferential selected.The mineral oil viscosity that domestic manufacturers are selected is larger, and the kinematic viscosity of oil is 100cSt left and right in the time of 40 ℃.In most of refrigeration machines, it is inevitable that cold-producing medium and lubricating oil are in contact with one another.Carbon-hydrogen refrigerant chemical property is more stable, and its solubility in mineral oil is very large.When carbon-hydrogen refrigerant and mineral oil, this high solubility causes cooled dose of institute of mineral oil to be diluted, and mineral oil viscosity is sharply declined, and this is disadvantageous to the lubricated of compressor, and also can affect the sealing function of lubricating oil, finally cause the high fault rate of compressor.The solubility of cold-producing medium in mineral oil is excessive, has also caused the increase of the best charging amount of system refrigerant, and the use amount of cold-producing medium is increased.The excessive saturated vapour pressure that also reduces cold-producing medium of solubility, can cause the decline of refrigerating effect per unit swept volume.
Through the literature search of prior art is found, Chinese utility model patent: CN201438056U, title: a kind of cooling cycle system of propane as refrigerant that adopt, this system is a kind of cooling cycle system of propane as refrigerant that adopt, relate to refrigerant circulation refrigeration system, in this system, comprise the compressor, reversal valve, condenser, expansion valve, the evaporimeter that via pipeline, connect successively, the circulatory system is divided into the monoblock type circulatory system or detachable circulation system.The feature of this utility model patent is that indoor apparatus of air conditioner, air-conditioner outdoor unit and the described pipeline system centre in aggregates in the monoblock type circulatory system is not provided with connector, indoor apparatus of air conditioner in detachable circulation system and described circulation line system centre in aggregates are not provided with connector, and have increased several and whether have the gas sensor of leakage phenomenon and the alarm for propane leakage situation is reported to the police for detection of refrigerant.But this utility model patent is the not description do not chosen of lubricating oil for compressor in the type of compressor used and device.If adopt traditional compressor and lubricating oil, in system, still there are a lot of technical problems: the compressor major part of employing is piston type or scroll compressor, and compressor lubrication oil sump is under admission pressure.When compressor lubrication oil sump is in admission pressure lower time, compressor exists inhales vapour loss on heating, and this has increased the harmful degree of superheat of suction vapour, has reduced refrigerating capacity, therefore, has increased power consumption, has reduced the efficiency of compressor.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the object of the present invention is to provide a kind of air-conditioning refrigeration plant, adopt the rotary compressor of high back pressure combine with regenerator and use low-viscosity oil, improved efficiency and the refrigeration system coefficient of refrigerating performance of compressor, and had the advantages that lubricating oil return is good.
In order to achieve the above object, technical scheme of the present invention is:
A kind of air-conditioning refrigeration plant, comprise the rotary compressor 1 of high back pressure, the outlet of the rotary compressor 1 of high back pressure is connected with the import of condenser 2, the outlet of condenser 2 is connected with the liquid-inlet of regenerator 5, the liquid outlet of regenerator 5 is connected with the import of expansion valve 3, the outlet of expansion valve 3 is connected with the import of evaporimeter 4, and the outlet of evaporimeter 4 is connected with the gas feed of regenerator 5, and the gas vent of regenerator 5 is connected with the import of the rotary compressor of high back pressure 1.
Beneficial effect of the present invention:
The first, domestic is piston type or scroll compressor using the compressor major part adopting in the aircondition of carbon-hydrogen refrigerant at present, and compressor lubrication oil sump is under admission pressure.When compressor lubrication oil sump is in admission pressure lower time, compressor exists inhales vapour loss on heating, and this has increased the harmful degree of superheat of suction vapour, has reduced refrigerating capacity, therefore, has increased power consumption, has reduced the efficiency of compressor.What the present invention used is the rotary compressor (also claiming compressor with rolling rotor, rolling piston compressor) of high back pressure, high back pressure be lubricating oil bath under pressure at expulsion, it is little that this class compressor is inhaled vapour loss on heating, compressor efficiency is higher.Therefore, the present invention can make the performance of refrigeration system be improved.
The second, the present invention adds regenerator in traditional air-conditioning refrigeration plant.When adopting after regenerator, can make the degree of superheat of lubricating oil bath improve, reduce the solubility of cold-producing medium in lubricating oil, thereby prevent the sharply decline of lubricating oil viscosity.So just can in refrigeration system, use the lubricating oil that viscosity is less, thereby solve the bad problem of lubricating oil return.
The 3rd, the present invention adds regenerator in traditional air-conditioning refrigeration plant.When adopting after regenerator, can make the degree of superheat of lubricating oil bath improve, reduce the solubility of cold-producing medium in lubricating oil, thereby prevent the sharply decline of lubricating oil viscosity.The series of problems that brings after can solving like this lubricating oil viscosity and declining, lubricated unfavorable as to compressor, affects the sealing function of lubricating oil, causes the high fault rate of compressor.
The 4th, when the lubricating oil bath degree of superheat hour, the little fluctuation of oil sump temperature can cause the variation that lubricating oil viscosity is large, this can cause the unstable of compressor operating state.When increasing after regenerator, can increase specific refrigerating effect and strengthen evaporimeter heat exchange, and can reduce invalid overheatedly, improve the suction temperature of compressor and the operating temperature of lubricating oil, make compressor in stable regional work, improved the reliability of compressor.
Accompanying drawing explanation
Fig. 1 is the system diagram of refrigerating plant of the present invention.
Fig. 2 is that carbon-hydrogen refrigerant is dissolved in after mineral oil, the schematic diagram of the relation curve of the kinematic viscosity of lubricating oil and the oil sump degree of superheat.
The specific embodiment
Below in conjunction with accompanying drawing, structural principle of the present invention and operation principle are described in detail.
A kind of air-conditioning refrigeration plant, comprise the rotary compressor 1 of high back pressure, the outlet of the rotary compressor 1 of high back pressure is connected with the import of condenser 2, the outlet of condenser 2 is connected with the liquid-inlet of regenerator 5, the liquid outlet of regenerator 5 is connected with the import of expansion valve 3, the outlet of expansion valve 3 is connected with the import of evaporimeter 4, and the outlet of evaporimeter 4 is connected with the gas feed of regenerator 5, and the gas vent of regenerator 5 is connected with the import of the rotary compressor of high back pressure 1.
Operation principle of the present invention is: first cold-producing medium enters the rotary compressor 1 of high back pressure, enters condenser 2 after being compressed into high temperature and high pressure gas, and the device that is then condensed is condensed into the liquid of middle temperature high pressure, and to Bas Discharged heat; The cold-producing medium regenerator 5 of flowing through subsequently, enters expansion valve 3, and being inflated valve 3 throttlings becomes the gas-liquid mixed state of low-temp low-pressure, and cold-producing medium enters evaporimeter 4 subsequently, with the air heat-exchange in environment, air themperature is reduced, thereby reaches the effect of refrigeration.The gas refrigerant of low-temp low-pressure is flowed through after regenerator 5 subsequently, is sucked, so circulation by rotary compressor 1 compressor of high back pressure.
In regenerator 5, the return-air generation heat exchange of the highly pressurised liquid flowing out from condenser 2 and evaporimeter 4, is cooled highly pressurised liquid and becomes supercooled state, and low pressure return-air is because the heat that has absorbed highly pressurised liquid becomes superheat state.Return-air overheated makes in compressor lubricating oil bath in superheat state, thereby reaches useful effect of the present invention.
The cold-producing medium that refrigeration system of the present invention is used is carbon-hydrogen refrigerant, comprises R50, R170, R290, R600, R600a, R1150 and R1270.
The lubricating oil that refrigeration system of the present invention is used is mineral oil, and its composition is mainly hydro carbons and a small amount of non-hydrocarbons material.The mineral oil that the present invention is used, its kinematic viscosity range is 10～60cSt in the time of 40 ℃.According to the difference of refrigeration system, while specifically selecting mineral oil, its range of viscosities is 10～20cSt, 20～30cSt, 30～40cSt, 40～50cSt, 50～60cSt.
For the intersolubility problem of cold-producing medium and lubricating oil, the present invention intends analyzing from the angle of the oil sump degree of superheat.Fig. 2 is that carbon-hydrogen refrigerant is dissolved in after mineral oil, the schematic diagram of the relation curve of the kinematic viscosity of lubricating oil and the oil sump degree of superheat.The solubility of cold-producing medium in lubricating oil and the degree of superheat of oil sump have very large relation as seen from Figure 2.When the oil sump degree of superheat hour, the solubility of cold-producing medium is just large, and oil viscosity is just little.Along with the increase of the oil sump degree of superheat, the solubility of cold-producing medium diminishes, and oil viscosity increases.When the degree of superheat of oil sump further increases, oil viscosity slowly reduces again, but reduce slower.Carbon-hydrogen refrigerant is due to its physical property feature, and in identical suction vapour degree of superheat situation, its discharge superheat is low.The low degree of superheat of oil sump that just caused of the degree of superheat of exhaust is low, and this has just caused a large amount of dissolvings of cold-producing medium.
The problem large for lubricating oil viscosity, oil return is bad, the present invention adopts the mineral oil that viscosity is lower, and its kinematic viscosity range is 10-60cSt in the time of 40 ℃.
Large for cold-producing medium solubility in mineral oil, thus the problem that causes mineral oil viscosity sharply to decline, and the present invention adds regenerator in traditional air-conditioning refrigeration plant.When adopting after regenerator, the highly pressurised liquid flowing out from condenser and the return-air generation heat exchange of evaporimeter, be cooled highly pressurised liquid and become supercooled state, and low pressure return-air is because the heat that has absorbed highly pressurised liquid becomes superheat state.The overheated degree of superheat that makes lubricating oil bath in compressor of return-air improves, and reduces the solubility of cold-producing medium in lubricating oil, thereby prevents the sharply decline of lubricating oil viscosity.
Claims (1)
1. an air-conditioning refrigeration plant, it is characterized in that, comprise the rotary compressor (1) of high back pressure, the outlet of the rotary compressor (1) of high back pressure is connected with the import of condenser (2), the outlet of condenser (2) is connected with the liquid-inlet of regenerator (5), the liquid outlet of regenerator (5) is connected with the import of expansion valve (3), the outlet of expansion valve (3) is connected with the import of evaporimeter (4), the outlet of evaporimeter (4) is connected with the gas feed of regenerator (5), the import of the rotary compressor (1) of the gas vent of regenerator (5) and high back pressure is connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310731231.5A CN103743143A (en) | 2013-12-24 | 2013-12-24 | Air conditioning refrigerating device |
| CN201410129552.2A CN103968618A (en) | 2013-12-24 | 2014-04-01 | Air conditioning refrigeration system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310731231.5A CN103743143A (en) | 2013-12-24 | 2013-12-24 | Air conditioning refrigerating device |
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| CN201310731231.5A Pending CN103743143A (en) | 2013-12-24 | 2013-12-24 | Air conditioning refrigerating device |
| CN201410129552.2A Pending CN103968618A (en) | 2013-12-24 | 2014-04-01 | Air conditioning refrigeration system |
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| CN105546864A (en) * | 2016-01-13 | 2016-05-04 | 西安交通大学 | Auto-cascade vapor compression type refrigeration cycle system with evaporation subcooler |
| CN107062667A (en) * | 2016-12-19 | 2017-08-18 | 格力电器（芜湖）有限公司 | A kind of coolant circulating system and its refrigerant circulation method |
| CN107062679A (en) * | 2017-04-27 | 2017-08-18 | 广东美的制冷设备有限公司 | Air-conditioning system and its control method |
| CN109974245A (en) * | 2019-04-11 | 2019-07-05 | 珠海格力电器股份有限公司 | The control method and air conditioner of target exhaust temperature |
| CN112815572A (en) * | 2021-01-18 | 2021-05-18 | 中科广能能源研究院(重庆)有限公司 | Gas heat pump air conditioning system and rapid heating and liquid-proof compression control method |
| CN113007920A (en) * | 2021-03-16 | 2021-06-22 | 西安交通大学 | Heat pump system based on regenerative cycle and throttling element control method |
| CN113237243A (en) * | 2021-04-26 | 2021-08-10 | 澳柯玛股份有限公司 | Refrigerating system and refrigerating method thereof |
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| JPH10332212A (en) * | 1997-06-02 | 1998-12-15 | Toshiba Corp | Refrigeration cycle of air conditioner |
| JP2005083741A (en) * | 2003-09-05 | 2005-03-31 | Lg Electronics Inc | Air conditioner having heat exchanger and refrigerant switching means |
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| JP5504050B2 (en) * | 2009-06-30 | 2014-05-28 | 株式会社ケーヒン・サーマル・テクノロジー | Double tube heat exchanger and method for manufacturing the same |
| CN102022325B (en) * | 2009-09-11 | 2012-10-24 | 广东美芝制冷设备有限公司 | Rotary compressor and refrigerating device with same |
| JP5721480B2 (en) * | 2011-03-10 | 2015-05-20 | 三菱電機株式会社 | Refrigeration cycle equipment |
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2013
- 2013-12-24 CN CN201310731231.5A patent/CN103743143A/en active Pending
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2014
- 2014-04-01 CN CN201410129552.2A patent/CN103968618A/en active Pending
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| CN105546864A (en) * | 2016-01-13 | 2016-05-04 | 西安交通大学 | Auto-cascade vapor compression type refrigeration cycle system with evaporation subcooler |
| CN105546864B (en) * | 2016-01-13 | 2018-05-18 | 西安交通大学 | A kind of Auto-cascade cycle steam compressed refrigerating circulating system of band evaporation subcooler |
| CN107062667A (en) * | 2016-12-19 | 2017-08-18 | 格力电器（芜湖）有限公司 | A kind of coolant circulating system and its refrigerant circulation method |
| CN107062667B (en) * | 2016-12-19 | 2022-07-29 | 格力电器（芜湖）有限公司 | Refrigerant circulating system and refrigerant circulating method thereof |
| CN107062679A (en) * | 2017-04-27 | 2017-08-18 | 广东美的制冷设备有限公司 | Air-conditioning system and its control method |
| CN109974245A (en) * | 2019-04-11 | 2019-07-05 | 珠海格力电器股份有限公司 | The control method and air conditioner of target exhaust temperature |
| CN112815572A (en) * | 2021-01-18 | 2021-05-18 | 中科广能能源研究院(重庆)有限公司 | Gas heat pump air conditioning system and rapid heating and liquid-proof compression control method |
| CN113007920A (en) * | 2021-03-16 | 2021-06-22 | 西安交通大学 | Heat pump system based on regenerative cycle and throttling element control method |
| CN113237243A (en) * | 2021-04-26 | 2021-08-10 | 澳柯玛股份有限公司 | Refrigerating system and refrigerating method thereof |
| CN113483475A (en) * | 2021-07-09 | 2021-10-08 | 青岛海尔空调器有限总公司 | Method for recovering and controlling oil stain in pipe of outdoor unit |
| WO2023040384A1 (en) * | 2021-09-18 | 2023-03-23 | 青岛海尔空调电子有限公司 | Air conditioner |
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| CN103968618A (en) | 2014-08-06 |
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Application publication date: 20140423 |