CN102226551B - Air conditioning system using hydrocarbon refrigerant - Google Patents
Air conditioning system using hydrocarbon refrigerant Download PDFInfo
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- CN102226551B CN102226551B CN 201110147799 CN201110147799A CN102226551B CN 102226551 B CN102226551 B CN 102226551B CN 201110147799 CN201110147799 CN 201110147799 CN 201110147799 A CN201110147799 A CN 201110147799A CN 102226551 B CN102226551 B CN 102226551B
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- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 63
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 63
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 63
- 239000003507 refrigerant Substances 0.000 title claims abstract description 53
- 238000004378 air conditioning Methods 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 238000000926 separation method Methods 0.000 claims description 16
- 238000009413 insulation Methods 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 12
- 239000003921 oil Substances 0.000 description 9
- 230000009471 action Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009102 absorption Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
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Abstract
The invention discloses an air conditioning system using a hydrocarbon refrigerant, which adopts the hydrocarbon refrigerant as a working medium; a reservoir is arranged outside a chamber, the reservoir is communicated with a condenser through a liquid storage branch, a first control valve is arranged inside the liquid storage branch, a second control valve is arranged in a downstream flow path outside the chamber and between the condenser and an evaporator, and a sensor is arranged on the evaporator inside the chamber; in the running process of the system, the sensor obtains a concentration signal value of the hydrocarbon refrigerant inside the chamber in real time, a system controller compares the concentration signal value of the hydrocarbon refrigerant inside the chamber with a set value, and when the concentration signal value of the hydrocarbon refrigerant inside the chamber is larger than the set value, the system controller sends a control command, the first control value is opened, and the second control valve is closed. The air conditioning system adopts the natural hydrocarbon refrigerant favorable for environmental protection as the working medium and accordingly, runs safely, conforms to national policies on energy-saving and emission-reduction, and has great economic and operation significance.
Description
Technical field
The present invention relates to air-conditioning technical field, is a kind of air-conditioning system of using hydrocarbon refrigerant specifically.
Background technology
In air conditioner industry now, because the native hydrocarbon cold-producing medium, as R290, have inflammable and explosive character, therefore at present in air conditioner industry, use the air-conditioning of native hydrocarbon cold-producing medium, be in blank substantially.At present, the cold-producing medium that air-conditioning generally uses, as R22, this cold-producing medium has stronger destruction to ozone layer, and discharges greenhouse gases, and is huge to the Global climate change influence.And the native hydrocarbon cold-producing medium, have ozone layer is not destroyed, and do not discharge the huge advantage of greenhouse gases, therefore the air-conditioning of native hydrocarbon cold-producing medium is used in exploitation, have very strong realistic meaning and huge economic interests, but because native hydrocarbon cold-producing medium, as R290, this cold-producing medium is owing to have inflammable and explosive character, therefore, the air-conditioning of natural hydrocarbon working medium cold-producing medium is used in exploitation, at first will overcome the inflammable and explosive problem of natural hydrocarbon working medium cold-producing medium, so that air-conditioning system can safe operation.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of air-conditioning system of using hydrocarbon refrigerant, adopt hydrocarbon refrigerant as working media, be conducive to environmental protection, simultaneously can safe operation.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of air-conditioning system of using hydrocarbon refrigerant, adopt hydrocarbon refrigerant as working media, be provided with a reservoir in the outside, reservoir is communicated with by a liquid storage branch road with condenser, be provided with first control valve in the liquid storage branch road, the downstream flow path that is arranged in the outside between condenser and the evaporimeter arranges second control valve, evaporimeter place in the indoor is provided with a sensor, described sensor obtains indoor hydrocarbon refrigerant concentration signal value in real time in system's running, system controller compares indoor hydrocarbon refrigerant concentration signal value and setting value, in indoor hydrocarbon refrigerant concentration signal value greater than when setting value, system controller sends control instruction, first control valve is opened, and second control valve is closed.
Preferably, described sensor also obtains indoor current hydrocarbon refrigerant concentration signal value before start, system controller compares current hydrocarbon refrigerant concentration signal value and setting value, in current hydrocarbon refrigerant concentration signal value less than when setting value, system boot.
Preferably, the stream between condenser and second control valve also is provided with an outside flow controller, the other check valve in parallel of described outside flow controller, described check valve by condenser to the second control valve conducting.
Preferably, the downstream flow path that is arranged in the indoor between condenser and the evaporimeter is provided with an indoor flow controller, the other check valve in parallel of described indoor flow controller, described check valve by evaporimeter to the second control valve conducting.
Preferably, described flow controller is expansion valve or capillary.
Preferably, described reservoir also is provided with the pressure release stream, is provided with a safety valve in the described pressure release stream.
Preferably, the upstream flow path that is arranged in the outside between condenser and evaporimeter is provided with a cross valve, one end of described cross valve and between the compressor of outside, be provided with the Oil-gas Separation branch road, be provided with a gs-oil separator in the Oil-gas Separation branch road, the gas outlet of compressor and inlet are communicated with gs-oil separator respectively.
Preferably, also be provided with the gas-liquid separation branch road between an other end of described cross valve and the compressor, described gas-liquid separation branch road is provided with gas-liquid separator.
Preferably, also be provided with a low-voltage protective switch in the inlet of compressor and the stream between the gs-oil separator.
Preferably, the outer wall of described reservoir is provided with fire proof heat-insulation layer.
Compared with prior art; has the defective inflammable, that explosion hazard has in order to overcome the native hydrocarbon cold-producing medium; the present invention is provided with corresponding safeguard protection; hydrocarbon refrigerant concentration detector-sensor is set; in order to survey refrigerant concentration; when detecting concentration surpasses safety value; system namely is converted to protected mode; cold-producing medium in the system is poured into storage separately in the standby reservoir; further; cover the thermal insulation layer of setting fire around the reservoir, isolated, with assurance equipment, personal security.
Further; the present invention also is provided with second level protection: namely at reservoir safety valve is set separately; to prevent under the extreme case; when reservoir fluid pressure abnormal ascending arrives danger level; mode by pressure release; the part cold-producing medium is let out in the ambient atmosphere, protected equipment and personal security to greatest extent.
The present invention can replace the air-conditioning system of using in the prior art the CFCs cold-producing medium of ozone generating considerable damage effect; employing is beneficial to the native hydrocarbon cold-producing medium of environmental protection as working media; under the situation that guarantees safety, move; the policy that meets national energy-saving and emission-reduction has huge economy and realistic meaning.
Description of drawings
The schematic diagram of air-conditioning system one preferred embodiment of Fig. 1 natural magnetic hydrogen cold-producing medium for the present invention uses;
Among the figure, relevant Reference numeral is as follows:
The 1-four-way change-over valve; The 2-condenser;
The 3-condenser fan; 4-tracheae stop valve;
The 5-evaporimeter; 6-native hydrocarbon refrigerant concentration detector;
7-indoor check valve; 8-indoor flow controller;
9-liquid pipe stop valve; The 10-magnetic valve;
11-outside check valve; 12-outside flow controller;
13-reservoir check valve; 14-reservoir magnetic valve;
The 15-safety valve; The 16-reservoir;
The 17-fire proof heat-insulation layer; The 18-gas-liquid separator;
The 19-gs-oil separator; The 20-low-voltage protective switch;
The 21-compressor.
The specific embodiment
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1, the air-conditioning system of the natural carbon-hydrogen refrigerant of use in the present embodiment comprises indoor and outside, wherein, be provided with in the outside four-way change-over valve 1, condenser 2, condenser fan 3, compressor 21, oil eliminator 19, gas-liquid separator 18, reservoir 16,, safety valve 15.Wherein, the indoor is provided with evaporimeter 5, native hydrocarbon refrigerant concentration detector 6.
Wherein, four-way change-over valve 1 is arranged in the loop of evaporimeter 5 and condenser 2, be respectively equipped with a gas-liquid separation branch road and Oil-gas Separation branch road between the other two ends of four-way change-over valve 2 and the compressor, wherein be provided with gas-liquid separator 18 in the gas-liquid separation branch road, be provided with gs-oil separator 19 in the Oil-gas Separation branch road, one end of Oil-gas Separation branch road is communicated with compressor, the other end is communicated with four-way change-over valve 1, one end of compressor 21 also is communicated with gs-oil separator 19, gas-liquid separation branch road one end is communicated with four-way change-over valve 1, and the other end is communicated with compressor.
Wherein, reservoir 16 is arranged on the below of condenser 2, be communicated with condenser 2, be provided with a liquid storage branch road between reservoir 16 and the condenser 2, be provided with reservoir magnetic valve 14 in this liquid storage branch road, the stream that is arranged in the outside between condenser 2 and the evaporimeter 5 also is provided with an outside flow controller 12, outside flow controller 12 other also check valves 11 in parallel, also be provided with a branch road between the stream of reservoir 16 and condenser and evaporimeter, be provided with check valve 13 in this branch road.
Wherein, the stream that condenser and evaporimeter are arranged in the indoor is provided with indoor flow controller 8, and a check valve 7 is gone back and be provided with to indoor flow controller 8.In the stream between condenser 2 and evaporimeter 5, the position between position and indoor and the outside is respectively equipped with tracheae stop valve 4 and liquid pipe stop valve 9.
Wherein, native hydrocarbon refrigerant concentration detector 6 is arranged on the indoor, the concentration of the native hydrocarbon cold-producing medium of sensing chamber inboard.The detection of native hydrocarbon refrigerant concentration detector 6 comprises detection and the operating detection before the start, before the start, native hydrocarbon refrigerant concentration detector 6 obtains the concentration of indoor native hydrocarbon cold-producing medium, the controller of system is compared with setting value according to this concentration signal, greater than setting value the time, then do not start shooting, during less than setting value, just start; And operating detection is: detector obtains the real-time concentration of indoor native hydrocarbon cold-producing medium, controller with this real-time concentration and setting value relatively during greater than setting value, then sends instruction at real-time concentration, system enters safe mode, namely close magnetic valve 10, open magnetic valve 14, make that the cold-producing medium in the condenser 2 flows directly in the reservoir 16, reservoir 16 also is provided with a safety valve 15, in case of necessity, can open safety valve 15, cold-producing medium is discharged.
Wherein, also be covered with fire proof heat-insulation layer 17 on the outer wall of reservoir 16, the liquid that is stored in the reservoir 16 is heat insulation with the external world by reservoir fire proof heat-insulation layer 17, takes place to prevent accidents such as the fire situation that sets off an explosion.
Wherein, indoor flow controller 8, outside flow controller 12 are expansion valve or capillary.
Wherein, one alarm (not shown) also is set, in system's running, if the real-time concentration that native hydrocarbon refrigerant concentration detector 6 detects the natural hydrocarbon working medium cold-producing medium in indoor is during greater than setting value, system enters safe mode, and at this moment, controller also sends alarm command, alarm sends alarm signal according to this alarm command, and alarm signal can be light or sound.
Below when system is in different mode, the operation of system's each several part is described.
One, system moves with refrigeration mode
1, during start, whether side reaches dangerous concentrations by natural hydrocarbon working medium refrigerant concentration in native hydrocarbon refrigerant concentration detector 6 inspection chambers earlier in system, if reach, then can not start, if do not reach, then can start operation, at this moment, magnetic valve 10 leaves, and 14 close, compressor 21 operations, cold-producing medium is compressed into high temperature, gases at high pressure separate through gs-oil separator 19, and the lubricating oil after the separation directly enters compressor after entering the compressor air suction pipeline, and high temperature, the gas of high pressure is then directly by behind the four-way change-over valve 1, enter condenser 2, take away heat by condenser fan 3 and be cooled to low temperature, highly pressurised liquid is by check valve 11, magnetic valve 10, liquid pipe stop valve 9 inlet chamber inboards, and become low pressure by 8 throttlings of indoor flow controller, cryogenic liquid, enter evaporimeter 5 evaporation heat absorptions, become low temperature, low-pressure gas, the tracheae stop valve 4 of flowing through then, four-way change-over valve 1 enters gas-liquid separator 18, enter compressor 21 compressions at last, finish kind of refrigeration cycle.
When 2, shutting down, magnetic valve 10 closes at this moment, and 14 open, and the cold-producing medium of process condenser condenses directly enters reservoir from condenser and stores, and system runs to till low-voltage protective switch 20 actions always, and system is out of service at this moment.
3, when system in running; after native hydrocarbon refrigerant concentration detector 6 detects the indoor and the native hydrocarbon leakage of refrigerant is arranged and reach dangerous concentrations; then directly switch to protected mode; magnetic valve 10 closes at this moment, and 14 open, and the cold-producing medium of process condenser condenses directly enters reservoir from condenser and stores; system runs to till low-voltage protective switch 20 actions always; this moment, system was all out of service, and reported to the police, and etc. pending.When warning disposes, normal operation recovers in system, and freeze according to above-mentioned circulation this moment.
Wherein, under extreme case; when if liquid refrigerant pressure persistent anomaly rises to danger level in the reservoir 16; can be by safety valve 15 directly to extraneous pressure release; and the release portion cold-producing medium is to place (the external special pipeline of safety valve is to safety and distribute the cold-producing medium place easily) safe and that distribute easily, with protection protection machinery equipment and personal security.
Two, dehumidification mode operation
The action of system's each several part is identical with refrigeration mode, repeats no more herein.
Three, heating mode operation
1, during start, whether system reaches dangerous concentrations by native hydrocarbon refrigerant concentration in native hydrocarbon refrigerant concentration detector 6 inspection chambers earlier, if reach, then can not start, if do not reach, then can start operation, this moment, magnetic valve 10 left, 14 close, compressor 21 operations, cold-producing medium is compressed into high temperature, gases at high pressure separate through gs-oil separator 19, lubricating oil after the separation directly enters compressor after entering the compressor air suction pipeline, and high temperature, the gas of high pressure is then directly by four-way change-over valve 1, tracheae stop valve 4, the inboard evaporimeter 5 of inlet chamber, by the heating indoor environment temperature, be condensed into high temperature, highly pressurised liquid, then by indoor check valve 7, the liquid pipe stop valve 9 inlet chambers outside, the magnetic valve 10 of flowing through again, 12 throttlings become low temperature through the outside flow controller, low pressure liquid enters condenser 2 evaporations, by condenser fan 3 forced-convection heat transfers, become low temperature, low-pressure gas, the four-way change-over valve 1 of flowing through enters gas-liquid separator 18, enter compressor 21 compressions at last, finish heating circulation.
When 2, shutting down, transfer under the refrigeration mode and shutting down, magnetic valve 10 closes at this moment, and 14 open, and the cold-producing medium of process condenser condenses directly enters reservoir from condenser and stores, and system runs to till low-voltage protective switch 20 actions always, and system is out of service at this moment.
3, when system in running; after native hydrocarbon refrigerant concentration detector 6 detects the indoor and the native hydrocarbon leakage of refrigerant is arranged and reach dangerous concentrations; then directly switch to the protected mode under the refrigerating state; magnetic valve 10 closes at this moment, and 14 open, and the cold-producing medium of process condenser condenses directly enters reservoir from condenser and stores; till system is out of service; when warning disposes, normal operation recovers in system, and heat according to above-mentioned circulation this moment.
More than the present invention is described in detail, use specific case in the literary composition principle of the present invention and embodiment set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (9)
1. air-conditioning system of using hydrocarbon refrigerant, adopt hydrocarbon refrigerant as working media, it is characterized in that, be provided with a reservoir in the outside, reservoir is communicated with by a liquid storage branch road with condenser, be provided with first control valve in the liquid storage branch road, the downstream flow path that is arranged in the outside between condenser and the evaporimeter arranges second control valve, evaporimeter place in the indoor is provided with a sensor, described sensor obtains indoor hydrocarbon refrigerant concentration signal value in real time in system's running, system controller compares indoor hydrocarbon refrigerant concentration signal value and setting value, in indoor hydrocarbon refrigerant concentration signal value greater than when setting value, system controller sends control instruction, and first control valve is opened, and second control valve is closed; Described reservoir also is provided with the pressure release stream, and described pressure release stream is connected with described reservoir, is provided with a safety valve in the described pressure release stream.
2. the air-conditioning system of use hydrocarbon refrigerant as claimed in claim 1, it is characterized in that, described sensor also obtains indoor current hydrocarbon refrigerant concentration signal value before start, system controller compares current hydrocarbon refrigerant concentration signal value and setting value, in current hydrocarbon refrigerant concentration signal value less than when setting value, system boot.
3. the air-conditioning system of use hydrocarbon refrigerant as claimed in claim 1, it is characterized in that, stream between condenser and second control valve also is provided with an outside flow controller, the other check valve in parallel of described outside flow controller, described check valve by condenser to the second control valve conducting.
4. the air-conditioning system of use hydrocarbon refrigerant as claimed in claim 1, it is characterized in that, the downstream flow path that is arranged in the indoor between condenser and the evaporimeter is provided with an indoor flow controller, the other check valve in parallel of described indoor flow controller, described check valve by evaporimeter to the second control valve conducting.
5. as the air-conditioning system of claim 3 or 4 described use hydrocarbon refrigerants, it is characterized in that described flow controller is expansion valve or capillary.
6. the air-conditioning system of use hydrocarbon refrigerant as claimed in claim 1, it is characterized in that, the upstream flow path that is arranged in the outside between condenser and evaporimeter is provided with a cross valve, one end of described cross valve and between the compressor of outside, be provided with the Oil-gas Separation branch road, be provided with a gs-oil separator in the Oil-gas Separation branch road, the gas outlet of compressor and inlet are communicated with gs-oil separator respectively.
7. the air-conditioning system of hydrocarbon refrigerant as claimed in claim 6 is characterized in that, also is provided with the gas-liquid separation branch road between an other end of described cross valve and the compressor, and described gas-liquid separation branch road is provided with gas-liquid separator.
8. the air-conditioning system of hydrocarbon refrigerant as claimed in claim 6 is characterized in that, also is provided with a low-voltage protective switch in the inlet of compressor and the stream between the gs-oil separator.
9. the air-conditioning system of hydrocarbon refrigerant as claimed in claim 1 is characterized in that, the outer wall of described reservoir is provided with fire proof heat-insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110147799 CN102226551B (en) | 2011-06-02 | 2011-06-02 | Air conditioning system using hydrocarbon refrigerant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110147799 CN102226551B (en) | 2011-06-02 | 2011-06-02 | Air conditioning system using hydrocarbon refrigerant |
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| CN102226551A CN102226551A (en) | 2011-10-26 |
| CN102226551B true CN102226551B (en) | 2013-07-10 |
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| CN103322641B (en) * | 2012-03-21 | 2016-06-01 | 广东美芝精密制造有限公司 | Use the method for controlling security of flammable coolant air-conditioner |
| AU2013101100B4 (en) * | 2013-08-17 | 2013-11-07 | Pioneer International Pty Ltd | An Arrangement and Method For Retrofitting an Air Conditioning System |
| CN103940158B (en) * | 2014-04-22 | 2017-01-11 | 珠海格力电器股份有限公司 | Air-conditioning outdoor unit, air-conditioning system and operation method of air-conditioning system |
| CN104075420B (en) * | 2014-07-02 | 2017-05-17 | 珠海格力电器股份有限公司 | Flammable refrigerant air-conditioner fire protection system and application method thereof as well as air-conditioner |
| CN106091500B (en) * | 2016-08-19 | 2018-11-13 | 珠海格力电器股份有限公司 | A kind of Safe liquid storage tank device and use its air-conditioning |
| JP7260806B2 (en) * | 2021-04-27 | 2023-04-19 | ダイキン工業株式会社 | Air conditioning system, operation control method thereof, and operation control device for air conditioning system |
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| CN1161570C (en) * | 2000-09-26 | 2004-08-11 | 大金工业株式会社 | Air conditioner |
| JP2003269752A (en) * | 2002-03-14 | 2003-09-25 | Sanyo Electric Co Ltd | Air conditioner |
| CN101539356A (en) * | 2009-04-14 | 2009-09-23 | 天津大学 | Flame proof and explosion proof system of combustible refrigeration agent and method |
| CN101737878B (en) * | 2009-12-12 | 2013-05-08 | 广东美的电器股份有限公司 | Air conditioner using combustible refrigerant and control method thereof |
| CN201575561U (en) * | 2010-01-13 | 2010-09-08 | 珠海格力电器股份有限公司 | Split type air conditioner and indoor unit thereof |
| CN101832621A (en) * | 2010-04-30 | 2010-09-15 | 中国科学院广州能源研究所 | Self-protection control method and self-protection control device of multi-online air-conditioning system |
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