CN104061705B - Two-stage Compression air-conditioning system and its control method - Google Patents
Two-stage Compression air-conditioning system and its control method Download PDFInfo
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- CN104061705B CN104061705B CN201410261178.1A CN201410261178A CN104061705B CN 104061705 B CN104061705 B CN 104061705B CN 201410261178 A CN201410261178 A CN 201410261178A CN 104061705 B CN104061705 B CN 104061705B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
Abstract
The invention discloses a kind of Two-stage Compression air-conditioning system and its control method, air-conditioning system includes that double-stage compressor, four-way change-over valve, outdoor heat exchanger, first throttle device, flash vessel, second throttling device and indoor heat exchanger, the aperture of first, second throttling arrangement can adjust；Also include bypass line, storage heater and control valve, bypass line is connected between the first end interface of outdoor heat exchanger and the air entry of double-stage compressor, first heat exchanger tube of storage heater is connected on the pipeline between the first end interface of the exhaust outlet and indoor heat exchanger of double-stage compressor, second heat exchanger tube of storage heater is connected on bypass line, and control valve is used for selectively turning on or disconnecting the pipeline and bypass line between the first end interface of outdoor heat exchanger and the air entry of double-stage compressor.The Two-stage Compression air-conditioning system of the present invention, can improve the operational efficiency of system；Also, defrosting speed is fast, the cold-producing medium that cannot be evaporated completely when defrosting can be avoided from entering compressor.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly to a kind of Two-stage Compression air-conditioning system and its control method.
Background technology
At present, the second vapor injection amount of the Two-stage Compression air-conditioning system with flash vessel is unadjustable, when compressor is using identical
Frequency when, the change of other parameters in system may cause the fluctuation of second vapor injection amount, make compressor to running status deviate
Best efficiency point, causes compressor run in best efficiency point.
In addition, the mode that Two-stage Compression air-conditioning system routinely defrosts is compressor in heating operations, when reaching defrosting condition
First shut down, then start turns refrigeration mode, is defrosted.After defrosting terminates, then shut down, then start goes back to heating mode.
This Defrost mode, through start-stop twice, time-consuming for defrosting for compressor.And heat can be absorbed from indoor environment under refrigeration mode,
During causing defrosting, indoor temperature declines rapidly, affects user to use comfortableness.Exist to solve traditional Defrost mode
The problems referred to above, prior art proposes a kind of thermal storage defrosting method, and the Defrost method is using being arranged on compressor housing
Storage heater is used as main low-temperature heat source during defrosting operating condition.When freezing or heating, storage heater absorbs the used heat of compressor, heats and removes
When white, four-way change-over valve does not commutate, and after refrigerant heat exchanger outflow indoors, enters through the bypass line in parallel with electric expansion valve
Enter and defrosted to outdoor heat exchanger.Although the Defrost method can solve the problems referred to above that traditional Defrost mode is present,
Due to the Defrost mode be the heat that produced using compressor carrying out accumulation of heat, the phase change heat storage material phase alternating temperature for therefore being used
Degree point will necessarily be relatively low, and heat-storing material heat absorption and exotherm rate can be relatively slow, so that defrosting speed is slower, when extending defrost
Between, equally affect heating effect and comfort level.Particularly with band defrost function Two-stage Compression air-conditioning system, heat when
Wait, because the presence of flash vessel, refrigerant is inherently subcooled when flash vessel is flow through again, that is, flow into outdoor heat exchanger
Refrigerant must be in compared to single stage compress lower temperature, then its frosting situation can be more serious, frequent, and therefore defrost speed
Degree is slower.And, defrosted when storage heater amount of stored heat is not enough, the cold-producing medium that cannot be evaporated completely in a large number can be caused to enter compression
Machine, so that cause fatal threat to the reliability of compressor.
Content of the invention
For above-mentioned state of the art, the technical problem to be solved is, there is provided a kind of Two-stage Compression is empty
Adjusting system, its middle air compensation can adjust, also, defrosting speed is fast, and the cold-producing medium that cannot be evaporated completely when defrosting can be avoided to enter
Compressor is adversely affected to compressor.
In order to solve above-mentioned technical problem, a kind of Two-stage Compression air-conditioning system provided by the present invention, including Two-stage Compression
Machine, four-way change-over valve, outdoor heat exchanger, first throttle device, flash vessel, second throttling device and indoor heat exchanger, described double
The exhaust outlet and air entry of level compressor is by the four-way change-over valve and the first end interface of the outdoor heat exchanger and described
First end interface of indoor heat exchanger is connected, the second end interface of the outdoor heat exchanger by the first throttle device with
The first interface of the flash vessel is connected, and the second interface of the flash vessel is by the second throttling device and the interior
Second end interface of heat exchanger is connected, and the 3rd interface of the flash vessel passes through the benefit of tonifying Qi pipeline and the double-stage compressor
Gas port is connected；
The aperture of the first throttle device and the second throttling device can adjust；
Also include that bypass line, storage heater and control valve, the bypass line are connected to the first of the outdoor heat exchanger
Between the air entry of end interface and the double-stage compressor, the storage heater has the first heat exchanger tube and the second heat exchanger tube, described
First heat exchanger tube is connected on the pipeline between the exhaust outlet of the double-stage compressor and the first end interface of the indoor heat exchanger
On, second heat exchanger tube is connected on the bypass line, and the control valve is used for selectively turning on or disconnecting the room
Pipeline and the bypass line between the air entry of first end interface and the double-stage compressor of external heat exchanger.
Wherein in one embodiment, described Two-stage Compression air-conditioning system also includes the 3rd throttling arrangement, the described 3rd
Throttling arrangement is connected on the bypass line of the second heat exchange tube inlet side of the storage heater.
Wherein in one embodiment, the 3rd throttling arrangement is capillary.
Wherein in one embodiment, the passage aperture of the control valve is made through the control less than the aperture of refrigerant pipe
Second heat exchanger tube of the storage heater is flowed into after the coolant throttle of valve processed.
Wherein in one embodiment, one end of the bypass line is connected to the four-way change-over valve and is changed with the outdoor
On pipeline between first end interface of hot device, the other end is connected to the air-breathing of the four-way change-over valve and the double-stage compressor
On pipeline between mouthful.
Wherein in one embodiment, the two ends of the bypass line are both connected to the four-way change-over valve with the twin-stage
On pipeline between the air entry of compressor.
Wherein in one embodiment, the valve that controls is for triple valve.
Wherein in one embodiment, the first throttle device and the second throttling device are electric expansion valve.
Wherein in one embodiment, on the tonifying Qi pipeline, aeration valve is provided with.
A kind of control method of Two-stage Compression air-conditioning system provided by the present invention, including：
When refrigeration or heating operation, the control valve turns on the first end interface of the outdoor heat exchanger and the twin-stage pressure
Pipeline, the disconnection bypass line between the air entry of contracting machine, by adjusting the first throttle device and/or described second
Uninterrupted of the aperture size adjustment of throttling arrangement through the cold-producing medium of the tonifying Qi pipeline；
During Defrost operation, the control valve disconnects first end interface and the double-stage compressor of the outdoor heat exchanger
Pipeline, the conducting bypass line between air entry.
Wherein in one embodiment, during Defrost operation, the tonifying Qi pipeline disconnects.
Compared with prior art, Two-stage Compression air-conditioning system of the invention and its control method, due to first throttle device
Can adjust with the aperture of second throttling device, by the aperture size for adjusting first throttle device and/or second throttling device be
The uninterrupted of the adjustable cold-producing medium through tonifying Qi pipeline, such that it is able to effectively arrive the air inflow for adjusting second vapor injection section, makes
System operation improves the operational efficiency of system near best efficiency point；And, the Two-stage Compression air-conditioning system is using compression
The high temperature refrigerant that machine is expelled directly out carries out accumulation of heat, the phase change heat storage material that therefore phase transformation temperature pointses can be adopted higher, so,
In defrosting, phase change heat storage material is increased with the temperature difference of cold-producing medium, and the exotherm rate of phase change heat storage material is fast, corresponding defrosting speed
Can also accelerate, it is ensured that the comfortableness that user uses.And, during defrosting, storage heater amount of stored heat is sufficient, it is to avoid cannot evaporate completely
Cold-producing medium enters compressor and causes liquid hammer, so as to cause fatal threat to the reliability of compressor.
Additional technical feature of the present invention is had the advantage that will to be said in this specification specific embodiment part
Bright.
Description of the drawings
Fig. 1 is the system diagram of the Two-stage Compression air-conditioning system in one of embodiment of the invention；
Fig. 2 is the schematic flow sheet when Two-stage Compression air-conditioning system in Fig. 1 is freezed；
Fig. 3 is the schematic flow sheet when Two-stage Compression air-conditioning system in Fig. 1 is heated；
Fig. 4 is the schematic flow sheet when Two-stage Compression air-conditioning system in Fig. 1 defrosts.
Description of reference numerals：1st, double-stage compressor；2nd, indoor heat exchanger；3rd, second throttling device；4th, flash vessel；5th, first
Throttling arrangement；6th, outdoor heat exchanger；7th, triple valve；8th, four-way change-over valve；9th, aeration valve；10th, the 3rd throttling arrangement；11st, accumulation of heat
Device；11a, the first heat exchanger tube；11b, the second heat exchanger tube；12nd, tonifying Qi pipeline；13rd, bypass line.
Specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments the present invention is described in detail.It should be noted that not conflicting
In the case of, the feature in following embodiment and embodiment can be mutually combined.
As shown in figure 1, the Two-stage Compression air-conditioning system in one of embodiment of the invention includes double-stage compressor 1, four
Logical reversal valve 8, outdoor heat exchanger 6, first throttle device 5, flash vessel 4, second throttling device 3, indoor heat exchanger 2, bypass pipe
Road 13, storage heater 11 and control valve.
Wherein, the exhaust outlet and air entry of the double-stage compressor 1 is by the four-way change-over valve 8 and the outdoor heat exchange
First end interface 6a of device 6 is connected with the first end interface 2a of the indoor heat exchanger 2, and the second of the outdoor heat exchanger 6
End interface 6b is connected with the first interface of the flash vessel 4 by the first throttle device 5, and the second of the flash vessel 4
Interface is connected with the second end interface 2b of the indoor heat exchanger 2 by the second throttling device 3, the flash vessel 4
3rd interface is connected with the gas supplementing opening of the double-stage compressor 1 by tonifying Qi pipeline 12.The first throttle device 5 and described
The aperture of second throttling device 3 can adjust, so, by adjusting the aperture of first throttle device 5 and/or second throttling device 3
Size can adjust the uninterrupted of the cold-producing medium through tonifying Qi pipeline 12, adjust entering for second vapor injection section such that it is able to effectively arrive
Tolerance, makes system operation near best efficiency point, improves the operational efficiency of system.
The bypass line 13 is connected to the first end interface 6a and the double-stage compressor 1 of the outdoor heat exchanger 6
Between air entry, in the present embodiment, one end of the bypass line 13 is connected to the four-way change-over valve 8 with the outdoor heat exchange
On pipeline between first end interface of device 6, the other end is connected to the suction of the four-way change-over valve 8 and the double-stage compressor 1
On pipeline between gas port.Certainly, the bypass line 13 can be both connected to the four-way change-over valve 8 with described pair with two ends
On pipeline between the air entry of level compressor 1.
There is the storage heater 11 first heat exchanger tube 11a and the second heat exchanger tube 11b, the first heat exchanger tube 11a to be connected on
On pipeline between the exhaust outlet of the double-stage compressor 1 and the four-way change-over valve 8, the first heat exchanger tube 11a can also connect
On pipeline between four-way change-over valve 8 and the first end interface of the indoor heat exchanger 2；The second heat exchanger tube 11b series connection
On the bypass line 13.
The control valve is used for the first end interface and the twin-stage for selectively turning on or disconnecting the outdoor heat exchanger 6
Pipeline and the bypass line 13 between the air entry of compressor 1.Preferably, the valve that controls is for triple valve 7, triple valve 7
Two two-port valves can also be adopted to replace.
The Two-stage Compression air-conditioning system of the present embodiment carries out accumulation of heat using the high temperature refrigerant that compressor is expelled directly out, therefore
The phase change heat storage material that phase transformation temperature pointses can be adopted higher, so, in defrosting, the temperature difference of phase change heat storage material and cold-producing medium
Increase, the exotherm rate of phase change heat storage material is fast, and corresponding defrosting speed can also be accelerated, it is ensured that the comfortableness that user uses.And
And, during defrosting, 11 amount of stored heat of storage heater is sufficient, it is to avoid the cold-producing medium for evaporate not complete enters compressor and causes liquid hammer, so as to pressing
The reliability of contracting machine causes fatal threat.
Preferably, also include that the 3rd throttling arrangement 10, the 3rd throttling arrangement 10 are connected on the second heat exchanger tube 11b
On the bypass line 13 of entrance side.It is further preferred that the 3rd throttling arrangement 10 is capillary.So, outdoor is changed
The refrigerant of the outlet of hot device 6 after capillary-compensated is entered back into the heat absorption evaporation of storage heater 11, is conducive to liquid coolant to steam completely
Send out, it is to avoid the cold-producing medium entrance double-stage compressor 1 for evaporate not complete causes liquid hammer.Certainly, capillary can also use passage aperture
Replace less than the triple valve 7 in refrigerant pipe aperture, such triple valve 7 can also play throttling action.
Preferably, aeration valve 9 is provided with the tonifying Qi pipeline 12, the conducting that tonifying Qi pipeline 12 is controlled by aeration valve 9
And disconnection.
The present invention also provides a kind of control method of Two-stage Compression air-conditioning system, comprises the following steps：
When step 1, refrigeration or heating operation, the triple valve 7 turns on the first end interface of the outdoor heat exchanger 6 and institute
State the pipeline between the air entry of double-stage compressor 1, disconnect the bypass line 13, the aeration valve 9 is opened, by adjusting institute
State the cold-producing medium of the aperture size adjustment through the tonifying Qi pipeline 12 of first throttle device 5 and/or the second throttling device 3
Uninterrupted.Detailed process is as follows：
When cooling system runs, Fig. 2 is seen, by 1 exhaust outlet of double-stage compressor high temperature and high pressure gas out through storage heater
11 the first heat exchanger tube 11a carries out heat exchange with phase change heat storage material, and phase change heat storage material absorbs heat and undergoes phase transition, heat is stored up
Store away, then refrigerant enters outdoor heat exchanger 6 through four-way change-over valve 8, and exchanges heat with outdoor environment, discharges heat, refrigerant elder generation
First throttle device 5 is flowed through, flash vessel 4 is entered back into and is vaporized, the liquid refrigerants that flash vessel 4 is separated is through second throttling device 3
Heat exchanger 2 is got in after throttling, is exchanged heat with indoor environment, absorb indoor heat amount of heat, eventually pass four-way and change
1 air entry of double-stage compressor is entered to valve 8, a kind of refrigeration cycle is completed；The gaseous coolant that flash vessel 4 is separated is through aeration valve
9 gas supplementing openings for entering double-stage compressor 1.When needing to increase air compensation, the aperture of big first throttle device 5 is opened, is turned down or is tieed up
Hold the aperture of second throttling device 3, so enter the coolant quantity increase of flash vessel 4, the coolant quantity of outflow reduces or constant, then in
Between air compensation increase；Or, the aperture of first throttle device 5 is turned down, while the aperture of second throttling device 3 is more turned down,
Although the refrigerant at this moment entering flash vessel 4 is reduced, the amplitude for flowing out the coolant quantity reduction of flash vessel 4 is bigger, second vapor injection amount
Increase.Conversely, when needing to reduce air compensation, turning down the aperture of first throttle device 5, close big or maintain second throttling device 3
Aperture, the coolant quantity for so entering flash vessel 4 reduces, and the coolant quantity of outflow increases or constant, then second vapor injection amount reduces；Or
Person, increases the aperture of first throttle device 5, while more increase the aperture of second throttling device 3, although at this moment enter flash distillation
The refrigerant of device 4 increases, but the amplitude that the coolant quantity of outflow flash vessel 4 increases is bigger, and second vapor injection amount reduces.
During system heating operation, Fig. 3 is seen, by 1 exhaust outlet of double-stage compressor high temperature and high pressure gas out through storage heater
11 the first heat exchanger tube 11a carries out heat exchange with phase change heat storage material, and phase change heat storage material absorbs heat and undergoes phase transition, heat is stored up
Store away, then refrigerant gets in heat exchanger 2 through four-way change-over valve 8, the heat release of the condensation of heat exchanger 2 indoors, then again through the
Two throttling arrangement 3 enters flash vessel 4 after throttling and carries out gas-liquid separation, and the liquid refrigerants that flash vessel 4 is separated is through first throttle
Device 5 enters outdoor heat exchanger 6 after throttling, and is evaporated in outdoor heat exchanger 6, absorbs heat, eventually passes triple valve 7 and four
Logical reversal valve 8 enters 1 air entry of double-stage compressor, completes once to heat circulation；The gaseous coolant that flash vessel 4 is separated is through mending
Air valve 9 enters the gas supplementing opening of double-stage compressor 1.When needing to increase air compensation, the aperture of big second throttling device 3 is opened, is turned down
Or the aperture of maintenance first throttle device 5, the coolant quantity increase of flash vessel 4 is so entered, the coolant quantity of outflow reduces or constant,
Then second vapor injection amount increase；Or, the aperture of second throttling device 3 is turned down, while more turning down opening for first throttle device 5
Degree, although the refrigerant at this moment entering flash vessel 4 is reduced, the amplitude for flowing out the coolant quantity reduction of flash vessel 4 is bigger, second vapor injection
Amount increase.Conversely, when needing to reduce air compensation, turning down the aperture of second throttling device 3, close big or maintain first throttle device
5 aperture, the coolant quantity for so entering flash vessel 4 reduce, and the coolant quantity of outflow increases or constant, then second vapor injection amount reduces；
Or, increase the aperture of second throttling device 3, while the more aperture of increase first throttle device 5, although at this moment enter dodge
The refrigerant of steaming device 4 increases, but the amplitude that the coolant quantity of outflow flash vessel 4 increases is bigger, and second vapor injection amount reduces.
As can be seen here, as the aperture of first throttle device 5 and second throttling device 3 can adjust, by adjusting first segment
The aperture size of stream device 5 and/or second throttling device 3 can adjust the uninterrupted of the cold-producing medium through tonifying Qi pipeline 12,
Such that it is able to realize the control of second vapor injection amount, make to run near system best efficiency point.
When step 2, Defrost operation, the triple valve 7 disconnects first end interface and the twin-stage of the outdoor heat exchanger 6
Pipeline, the conducting bypass line 13 between the air entry of compressor 1, the aeration valve 9 are closed.Detailed process is as follows：
When system enters defrosting by heating operation, see that Fig. 4, the high temperature refrigerant that 1 exhaust outlet of double-stage compressor is discharged are flowed through
First heat exchanger tube 11a of storage heater 11 carries out heat exchange with phase change heat storage material, and phase change heat storage material absorbs heat and undergoes phase transition, will
Heat storage gets up, and then refrigerant gets in heat exchanger 2 through four-way change-over valve 8, in order to reduce thermal loss, now indoor wind
Machine is cut out or low windscreen state.After flowing through indoor heat exchanger 2, refrigerant only has a small amount of heat loss, then flows through the second throttling dress
3, flash vessel 4, first throttle device 5 is put, is that the heat loss for ensureing refrigerant when these three elements are flowed through reduces as far as possible, the
The aperture of two throttling arrangements 3 and first throttle device 5 reaches maximum, closes aeration valve 9.Then high temperature refrigerant enters outdoor heat exchange
Device 6 is defrosted；After condensing heat-exchange in outdoor heat exchanger 6, then the second heat exchange of the entrance storage heater 11 that commutated by triple valve 7
Pipe 11b, absorbs the heat of savings in storage heater 11, is evaporated, subsequently into 1 air entry of double-stage compressor, completes defrosting and follow
Ring.
As can be seen here, the Two-stage Compression air-conditioning system of the embodiment of the present invention, the high-temperature refrigeration being expelled directly out using compressor
Agent carries out accumulation of heat, the phase change heat storage material that therefore phase transformation temperature pointses can be adopted higher, so, in defrosting, phase-transition heat-storage material
Material is increased with the temperature difference of cold-producing medium, and the exotherm rate of phase change heat storage material is fast, and corresponding defrosting speed can also be accelerated, it is ensured that user
The comfortableness for using.And, during defrosting, storage heater amount of stored heat is sufficient, it is to avoid the cold-producing medium entrance compressor for evaporate not complete is caused
Liquid hammer, so that cause fatal threat to the reliability of compressor.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the guarantor of the present invention
Shield scope.
Claims (11)
1. a kind of Two-stage Compression air-conditioning system, including double-stage compressor, four-way change-over valve, outdoor heat exchanger, first throttle device,
Flash vessel, second throttling device and indoor heat exchanger, the exhaust outlet and air entry of the double-stage compressor are changed by the four-way
It is connected to valve with the first end interface of first end interface and the indoor heat exchanger of the outdoor heat exchanger, the outdoor is changed
Second end interface of hot device is connected with the first interface of the flash vessel by the first throttle device, the flash vessel
Second interface is connected with the second end interface of the indoor heat exchanger by the second throttling device, and the of the flash vessel
Three interfaces are connected with the gas supplementing opening of the double-stage compressor by tonifying Qi pipeline；
Characterized in that, the aperture of the first throttle device and the second throttling device can adjust；
Also include that bypass line, storage heater and control valve, the bypass line are connected to the first termination of the outdoor heat exchanger
Mouthful and the air entry of the double-stage compressor between, the storage heater has the first heat exchanger tube and the second heat exchanger tube, and described first
Heat exchanger tube is connected on the pipeline between the exhaust outlet of the double-stage compressor and the first end interface of the indoor heat exchanger, institute
State the second heat exchanger tube to be connected on the bypass line；
When refrigeration or heating operation, the control valve turns on first end interface and the double-stage compressor of the outdoor heat exchanger
Air entry between pipeline, disconnect the bypass line, by adjusting the first throttle device and/or second throttling
Uninterrupted of the aperture size adjustment of device through the cold-producing medium of the tonifying Qi pipeline；
During Defrost operation, the control valve disconnects the first end interface of the outdoor heat exchanger and the air-breathing of the double-stage compressor
Pipeline, the conducting bypass line between mouthful.
2. Two-stage Compression air-conditioning system according to claim 1, it is characterised in that also include the 3rd throttling arrangement, described
3rd throttling arrangement is connected on the bypass line of the second heat exchange tube inlet side of the storage heater.
3. Two-stage Compression air-conditioning system according to claim 2, it is characterised in that the 3rd throttling arrangement is capillary
Pipe.
4. Two-stage Compression air-conditioning system according to claim 1, it is characterised in that the passage aperture of the control valve is less than
The aperture of refrigerant pipe, makes second heat exchanger tube for flowing into the storage heater after the coolant throttle of the control valve.
5. Two-stage Compression air-conditioning system according to claim 1, it is characterised in that one end of the bypass line is connected to
On pipeline between the four-way change-over valve and the first end interface of the outdoor heat exchanger, the other end is connected to the four-way and changes
To on the pipeline between the air entry of valve and the double-stage compressor.
6. Two-stage Compression air-conditioning system according to claim 1, it is characterised in that the two ends of the bypass line are all connected with
On pipeline between the air entry of the four-way change-over valve and the double-stage compressor.
7. Two-stage Compression air-conditioning system according to claim 1, it is characterised in that the valve that controls is for triple valve.
8. Two-stage Compression air-conditioning system as claimed in any of claims 1 to 7, it is characterised in that the first segment
Stream device and the second throttling device are electric expansion valve.
9. Two-stage Compression air-conditioning system as claimed in any of claims 1 to 7, it is characterised in that the blowdown pipe
Aeration valve is provided with road.
10. a kind of control method of Two-stage Compression air-conditioning system as in one of claimed in any of claims 1 to 9, its feature exist
In, including：
When refrigeration or heating operation, the control valve turns on first end interface and the double-stage compressor of the outdoor heat exchanger
Air entry between pipeline, disconnect the bypass line, by adjusting the first throttle device and/or second throttling
Uninterrupted of the aperture size adjustment of device through the cold-producing medium of the tonifying Qi pipeline；
During Defrost operation, the control valve disconnects the first end interface of the outdoor heat exchanger and the air-breathing of the double-stage compressor
Pipeline, the conducting bypass line between mouthful.
The control method of 11. Two-stage Compression air-conditioning systems according to claim 10, it is characterised in that during Defrost operation,
The tonifying Qi pipeline disconnects.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410261178.1A CN104061705B (en) | 2014-06-12 | 2014-06-12 | Two-stage Compression air-conditioning system and its control method |
| PCT/CN2015/076355 WO2015188656A1 (en) | 2014-06-12 | 2015-04-10 | Two-stage compression air conditioning system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410261178.1A CN104061705B (en) | 2014-06-12 | 2014-06-12 | Two-stage Compression air-conditioning system and its control method |
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| Publication Number | Publication Date |
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| CN104061705A CN104061705A (en) | 2014-09-24 |
| CN104061705B true CN104061705B (en) | 2017-03-15 |
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| CN201410261178.1A Active CN104061705B (en) | 2014-06-12 | 2014-06-12 | Two-stage Compression air-conditioning system and its control method |
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| WO (1) | WO2015188656A1 (en) |
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| CN203907772U (en) * | 2014-04-22 | 2014-10-29 | 珠海格力电器股份有限公司 | Air conditioning system with defrosting function |
| CN104061705B (en) * | 2014-06-12 | 2017-03-15 | 珠海格力电器股份有限公司 | Two-stage Compression air-conditioning system and its control method |
| CN104764241A (en) * | 2015-03-30 | 2015-07-08 | 珠海格力电器股份有限公司 | Air conditioner |
| CN104913558A (en) * | 2015-06-08 | 2015-09-16 | 珠海格力电器股份有限公司 | Two-stage enthalpy-increasing compressor control method |
| CN106288562B (en) * | 2016-08-16 | 2019-01-04 | 东北电力大学 | A kind of the defrosting control device and its method of air source heat pump system |
| CN106288484B (en) * | 2016-08-16 | 2019-01-04 | 东北电力大学 | A kind of air source heat pump system and its defrosting control method |
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| CN106288564A (en) * | 2016-09-30 | 2017-01-04 | 芜湖美智空调设备有限公司 | Air conditioning system |
| CN106767079B (en) * | 2017-01-10 | 2019-01-22 | 美的集团武汉制冷设备有限公司 | Accumulation of heat component and air conditioner |
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| CN104061705A (en) | 2014-09-24 |
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Inventor after: Wang Xianlin Inventor after: Li Dawei Inventor after: Xiong Jun Inventor after: Liang Zhitao Inventor after: Wu Junhong Inventor after: Lian Caiyun Inventor after: Peng Guangqian Inventor after: Lai Xiaocheng Inventor after: Tao Mengchun Inventor after: Liao Min Inventor after: Tian Yasong Inventor after: Che Wen Inventor before: Li Dawei Inventor before: Xiong Jun Inventor before: Liang Zhitao |
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