CN104197595B - Method for judging whether gas supply amount of two-stage compressor exceeds range or not and heat exchange equipment - Google Patents
Method for judging whether gas supply amount of two-stage compressor exceeds range or not and heat exchange equipment Download PDFInfo
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- CN104197595B CN104197595B CN201410441441.5A CN201410441441A CN104197595B CN 104197595 B CN104197595 B CN 104197595B CN 201410441441 A CN201410441441 A CN 201410441441A CN 104197595 B CN104197595 B CN 104197595B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000003507 refrigerant Substances 0.000 claims abstract description 147
- 230000006835 compression Effects 0.000 claims abstract description 31
- 238000007906 compression Methods 0.000 claims abstract description 31
- 230000008676 import Effects 0.000 claims description 76
- 230000003466 anti-cipated effect Effects 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 17
- 239000002826 coolant Substances 0.000 claims description 13
- 239000013589 supplement Substances 0.000 abstract 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000010725 compressor oil Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000037351 starvation Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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- Air Conditioning Control Device (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention provides a method for judging whether the air supplement amount of a two-stage compressor exceeds a range and heat exchange equipment. The judging method comprises the following steps: step S10: judging whether the actual exhaust temperature of the two-stage compressor is less than the predicted exhaust temperature of the two-stage compressor, if the actual exhaust temperature of the two-stage compressor is not less than the predicted exhaust temperature of the two-stage compressor, executing step S20, wherein step S20 includes step S22; step S22: adjusting the quantity of the refrigerant to be compressed entering a first-stage compression device of the two-stage compressor to the minimum value allowed, then judging whether the actual exhaust temperature of the two-stage compressor is lower than the predicted exhaust temperature of the two-stage compressor, and if the actual exhaust temperature of the two-stage compressor is not lower than the predicted exhaust temperature of the two-stage compressor, the air supplement quantity of the two-stage compressor is not out of range. The technical scheme of the invention can more accurately judge whether the air supplement amount of the double-stage compressor exceeds the range.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to heat transmission equipment and whether judge the air compensation of double-stage compressor
The method of over range.
Background technology
At present, double-stage compressor carries out two compressions to refrigerant, and it includes first order compression set and second level compression set,
Double-stage compressor needs mixed with tonifying Qi refrigerant (i.e. increasing enthalpy refrigerant), to reduce by the refrigerant after first order compression set
The temperature of the refrigerant after mixing, through second level compression set and finally discharges double-stage compressor by the gas after mixing, works as benefit
In the case of gas excess, after running a period of time, it will dilution compressor lubricant oil, compressor oil starvation problem is caused to occur, oil film
Can not be formed, high pressure can not effectively be set up.
Summary of the invention
It is desirable to provide the method for a kind of air compensation judging double-stage compressor more accurately whether over range and heat transmission equipment.
To achieve these goals, according to an aspect of the invention, it is provided a kind of air compensation judging double-stage compressor whether
The method of over range, comprises the steps: step S10: judge that whether the actual exhaust air temperature of double-stage compressor is less than this twin-stage pressure
The anticipated delivery temperature of contracting machine, if the actual exhaust air temperature of double-stage compressor is less than the anticipated delivery temperature of this double-stage compressor,
The then air compensation over range of double-stage compressor, if the actual exhaust air temperature of double-stage compressor estimating not less than this double-stage compressor
Delivery temperature, then perform step S20, and step S20 includes step S22；Step S22: the first order of double-stage compressor will be entered
The coolant quantity to be compressed of compression set is adjusted to the minimum of a value allowed, and whether judges the actual exhaust air temperature of double-stage compressor the most again
Less than the anticipated delivery temperature of this double-stage compressor, if the actual exhaust air temperature of double-stage compressor is less than the pre-of this double-stage compressor
Meter delivery temperature, then the air compensation over range of double-stage compressor, if the actual exhaust air temperature of double-stage compressor is not less than this twin-stage
The anticipated delivery temperature of compressor, then the air compensation of double-stage compressor does not has over range.
Further, step S20 also includes: step S21: the actual exhaust air amount of double-stage compressor is adjusted to this double-stage compressor
Anticipated capacity, judge that the anticipated delivery temperature of double-stage compressor deducts the actual exhaust air temperature gained of double-stage compressor the most again
Difference whether more than preset value, this preset value is more than zero, if difference is more than preset value, then the air compensation of double-stage compressor surpasses
Scope, if difference is not more than preset value, then performs step S22.
Further, the anticipated delivery temperature of double-stage compressor is 50 DEG C.
Further, preset value is 30 DEG C.
Further, by the aperture of regulation electromagnetic expanding valve, the coolant quantity to be compressed entering first order compression is adjusted to permission
Minimum of a value.
Further, the tonifying Qi refrigerant that double-stage compressor carries out tonifying Qi is produced by flash vessel.
According to a further aspect in the invention, it is provided that apply the heat transmission equipment of above-mentioned determination methods: double-stage compressor, have
One stage of compression device and the second pole compression device, first order compression set has refrigerant the first import and refrigerant first exports, and second
Pole compression device has refrigerant the second import and refrigerant second exports, and refrigerant first exports by hybrid chamber and refrigerant the second import phase
Connection；Outdoor unit heat exchanger, has refrigerant first and imports and exports and refrigerant second is imported and exported, refrigerant first import and export respectively with refrigerant
First import is connected with refrigerant the second outlet, and refrigerant the first import and refrigerant second export all to import and export with refrigerant first has phase
The channel status of connection and the off state blocked mutually；Indoor set heat exchanger, has refrigerant the 3rd and imports and exports and refrigerant the 4th turnover
Mouthful, refrigerant second is imported and exported to import and export with refrigerant the 3rd and is connected, refrigerant the 4th import and export respectively with refrigerant the first import and refrigerant
Second outlet is connected, and refrigerant the first import exports with refrigerant second all has, with refrigerant the 4th import and export, the channel status being connected
The off state blocked mutually；Making-up air device, has exhaust outlet, and exhaust outlet is connected with hybrid chamber, and exhaust outlet has with hybrid chamber
There are the channel status being connected and the off state blocked mutually.
Further, the heat transmission equipment of the present invention also includes: reversing arrangement, and refrigerant first is imported and exported by this reversing arrangement respectively
Being connected with refrigerant the first import and refrigerant the second outlet, refrigerant the 4th is imported and exported to be entered with refrigerant first respectively by this reversing arrangement
Mouth is connected with refrigerant the second outlet.
Further, refrigerant second is connected between importing and exporting and importing and exporting with refrigerant the 3rd electromagnetic expanding valve.
Further, refrigerant second is imported and exported to be connected between importing and exporting with refrigerant the 3rd flash vessel, and flash vessel forms making-up air device,
Flash vessel also includes that refrigerant the 5th is imported and exported and refrigerant the 6th import and export, and refrigerant the 5th is imported and exported to import and export with refrigerant second and is connected,
Refrigerant the 6th is imported and exported to import and export with refrigerant the 3rd and is connected.
Application technical scheme, is tentatively judged by step S10, when tentatively judging that air compensation does not has over range,
Also need to perform step S22, if this is primarily due to enter the coolant quantity to be compressed of the first order compression set of double-stage compressor very
Time big, the actual exhaust air temperature of this double-stage compressor can be higher, even if air compensation over range, the most also can
Show that air compensation does not has the conclusion of over range, therefore, for preventing from only relying on step S10, erroneous judgement occurs, need first will enter
The coolant quantity to be compressed of the first order compression set of double-stage compressor be adjusted to allow minimum of a value, the most again to air compensation with or without
Over range judges, and then the conclusion of the air compensation drawn whether over range is reliable, more accurately.By above-mentioned point
Analysis understands, and the method for the air compensation judging double-stage compressor of the present invention whether over range is more accurate.
Accompanying drawing explanation
The Figure of description of the part constituting the application is used for providing a further understanding of the present invention, and the present invention's is schematic real
Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the enforcement of the heat transmission equipment of the method for the air compensation the judging double-stage compressor whether over range of the application present invention
The structural representation of example.
Wherein, the reference in above-mentioned figure is as follows:
10, double-stage compressor；11, refrigerant the first import；12, refrigerant second exports；20, outdoor unit heat exchanger；21, refrigerant
First imports and exports；22, refrigerant second is imported and exported；30, indoor set heat exchanger；31, refrigerant the 3rd is imported and exported；32, refrigerant
Four import and export；40, making-up air device；41, exhaust outlet；42, refrigerant the 5th is imported and exported；43, refrigerant the 6th is imported and exported；50、
Reversing arrangement；60, electromagnetic expanding valve；71, the first heat exchange blower fan；72, the first motor；73, the second heat exchange blower fan；74、
Second motor；75, capillary.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
For the ease of the method describing the air compensation the judging double-stage compressor whether over range of the present embodiment, Fig. 1 shows application
A kind of heat transmission equipment of the determination methods of the present embodiment, the side of the air compensation judging double-stage compressor of the present embodiment whether over range
Method includes step S10 and step S20, and step S20 includes step S22, and each step is as follows:
Step S10: judge whether the actual exhaust air temperature of double-stage compressor 10 is less than the anticipated delivery temperature of this double-stage compressor 10,
If the actual exhaust air temperature of double-stage compressor 10 is less than the anticipated delivery temperature of this double-stage compressor 10, then double-stage compressor 10
Air compensation over range, if the actual exhaust air temperature of double-stage compressor 10 not less than this double-stage compressor 10 anticipated exhaust temperature
Degree, then perform step S20；
Step S22: the coolant quantity to be compressed entering the first order compression set of double-stage compressor 10 is adjusted to the minimum of a value allowed,
Judge whether the actual exhaust air temperature of double-stage compressor 10 is less than the anticipated delivery temperature of this double-stage compressor 10 the most again, if
The actual exhaust air temperature of double-stage compressor 10 is less than the anticipated delivery temperature of this double-stage compressor 10, the then benefit of double-stage compressor 10
Tolerance over range, if the actual exhaust air temperature of double-stage compressor 10 is not less than the anticipated delivery temperature of this double-stage compressor 10,
Then the air compensation of double-stage compressor 10 does not has over range.The actual exhaust air temperature of double-stage compressor 10 and entrance double-stage compressor
The minimum of a value that the coolant quantity to be compressed of the first order compression set of 10 is adjusted to allow is all that staff can be come by actual condition
Determine.
The method of the air compensation the judging double-stage compressor whether over range of application the present embodiment, is tentatively sentenced by step S10
It is disconnected, when tentatively judging that air compensation does not has over range, in addition it is also necessary to perform step S22, if this is primarily due to enter Two-stage Compression
When the coolant quantity to be compressed of the first order compression set of machine 10 is the biggest, the actual exhaust air temperature of this double-stage compressor 10 can be higher,
Even if air compensation over range, the most also can show that air compensation does not has the conclusion of over range, therefore, for only preventing
Rely on step S10 that erroneous judgement occurs, need first to enter the coolant quantity to be compressed of the first order compression set of double-stage compressor 10
It is adjusted to the minimum of a value allowed, the most again air compensation is judged with or without over range, and then whether the air compensation drawn surpasses model
The conclusion enclosed is reliable, more accurately.As the above analysis, the air compensation judging double-stage compressor of the present embodiment
The method of over range is more accurate.
In the present embodiment, step S20 also includes step S21, performs step S21 before performing step S22.
Step S21: the actual exhaust air amount of double-stage compressor 10 is adjusted to the anticipated capacity of this double-stage compressor 10, the most again
Judge whether the difference of the actual exhaust air temperature gained that the anticipated delivery temperature of double-stage compressor 10 deducts double-stage compressor 10 is more than
Preset value, this preset value is more than zero, if difference is more than preset value, then the air compensation over range of double-stage compressor 10, if poor
Value is not more than preset value, then perform step S22.The coolant quantity to be compressed of the first order compression set of double-stage compressor 10 will be entered
When the minimum of a value being adjusted to allow is compressed, double-stage compressor 10 is easily subject to damage, and therefore, increases before step S22
, equally there is erroneous judgement for avoiding only relying on step S10 by step S21 in step S21, and above-mentioned preset value is work people
Member can be determined by the operation conditions of actual condition and double-stage compressor 10.
In the present embodiment, the anticipated delivery temperature of double-stage compressor 10 is 50 DEG C, and the anticipated delivery temperature of 50 DEG C is in system
The maximum of the condensation temperature in cold use temperature range, this numerical value is just to be drawn by the experiment accumulation that inventor is long-term, energy
Enough raising only relies on the accuracy that step S10 is reached a conclusion.Anticipated delivery temperature (can also be wrapped between 50 DEG C to 90 DEG C
Include 90 DEG C) an optional numerical value.
In the present embodiment, preset value is 30 DEG C.This numerical value is just to be drawn, substantially by the experiment accumulation that inventor is long-term
Air compensation whether over range can be judged the most exactly.
In the present embodiment, by the aperture of regulation electromagnetic expanding valve 60, the coolant quantity to be compressed entering first order compression is adjusted to
The minimum of a value allowed.Can realize compressing the entrance first order when aperture of electromagnetic expanding valve 60 being regulated to permission lower limit opening value
Coolant quantity to be compressed be adjusted to allow minimum of a value.
In the present embodiment, the tonifying Qi refrigerant that double-stage compressor 10 carries out tonifying Qi is produced by flash vessel.Flash vessel can act on and changing
A part for hot equipment, it is not necessary to other equipment are set to produce tonifying Qi refrigerant.
Present invention also provides a kind of heat transmission equipment applying above-mentioned determination methods, as it is shown in figure 1, in the application of the present embodiment
The heat transmission equipment of the determination methods stated includes double-stage compressor 10, outdoor unit heat exchanger 20, indoor set heat exchanger 30 and tonifying Qi dress
Put 40.Double-stage compressor 10 has first order compression set and the second pole compression device, and first order compression set has refrigerant first
Import 11 and refrigerant first export, and the second pole compression device has refrigerant the second import and refrigerant second exports 12, and refrigerant first goes out
Mouth is connected with refrigerant the second import by hybrid chamber.Outdoor unit heat exchanger 20 has refrigerant first and imports and exports 21 and refrigerant second
Importing and exporting 22, refrigerant first is imported and exported 21 and is exported 12 be connected with refrigerant the first import 11 and refrigerant second respectively, refrigerant first
Import 11 exports 12 and all imports and exports 21 with refrigerant first and have the channel status being connected and the open circuit shape blocked mutually with refrigerant second
State.Indoor set heat exchanger 30 has refrigerant the 3rd import and export 31 and refrigerant the 4th imports and exports 32, and refrigerant second imports and exports 22 with cold
Matchmaker the 3rd imports and exports 31 and is connected, and refrigerant the 4th is imported and exported 32 and exported 12 be connected with refrigerant the first import 11 and refrigerant second respectively
Connecing, refrigerant the first import 11 exports 12 and all has, with refrigerant the 4th import and export 32, the channel status and phase being connected with refrigerant second
The off state blocked.Making-up air device 40 has exhaust outlet 41, and exhaust outlet 41 is connected with hybrid chamber, exhaust outlet 41 with mix
Chamber has the channel status being connected and the off state blocked mutually.It is connected between making-up air device 40 and hybrid chamber and has flow control valve.
By the channel status between above-mentioned each device and the transformation of off state, it is possible to realize refrigeration and heat.Application determination methods
Heat transmission equipment is air-conditioner.Refrigerant the first import 11 is i.e. the air inlet of double-stage compressor 10, and it is i.e. double that refrigerant second exports 12
The gas outlet of level compressor 10.
As it is shown in figure 1, the heat transmission equipment of the present embodiment also includes reversing arrangement 50, refrigerant first is imported and exported 21 and is filled by this commutation
Putting 50 to export 12 be connected with refrigerant the first import 11 and refrigerant second respectively, refrigerant the 4th imports and exports 32 by this reversing arrangement
50 export 12 be connected with refrigerant the first imports 11 and refrigerant second respectively.The present embodiment can be simplified by reversing arrangement 50
The structure of heat transmission equipment.
As it is shown in figure 1, in the present embodiment, reversing arrangement 50 includes cross valve and four connecting tubes.Cross valve has four companies
Connect end；Four connecting tubes are connected end with four and connect one to one, and four connect end and go out with refrigerant the first import 11, refrigerant second
Mouthfuls 12, refrigerant first import and export 21 and refrigerant the 4th import and export 32 and connected one to one by the connecting tube of correspondence.
As it is shown in figure 1, in the present embodiment, refrigerant second is imported and exported to be connected between 22 with refrigerant the 3rd import and export 31 electromagnetism
Expansion valve 60.
As it is shown in figure 1, in the present embodiment, refrigerant second is imported and exported to be connected between 22 with refrigerant the 3rd import and export 31 flash distillation
Device, flash vessel forms making-up air device 40, and flash vessel also includes that refrigerant the 5th import and export 42 and refrigerant the 6th import and export 43, refrigerant
5th import and export 42 are imported and exported 22 with refrigerant second and are connected, and refrigerant the 6th is imported and exported 43 and is connected with refrigerant the 3rd import and export 31
Connect.Additionally, refrigerant the 5th import and export 42 and refrigerant second are imported and exported to connect between 22 capillary 75, electromagnetic expanding valve 60
Import and export between 43 and refrigerant the 3rd import and export 31 in refrigerant the 6th.The heat transmission equipment of application determination methods also includes outside respective chamber/chambers
First heat exchange blower fan 71 of machine heat exchanger 20, drive the first motor 72 of the first heat exchange blower fan 71, corresponding indoor set heat exchanger 30
The second heat exchange blower fan 73 and drive the second motor 74 of the second heat exchange blower fan 73.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for those skilled in the art
For, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of being made, etc.
With replacement, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. the method for the air compensation judging double-stage compressor whether over range, it is characterised in that comprise the steps:
Step S10: judge whether the actual exhaust air temperature of double-stage compressor (10) is less than the pre-of this double-stage compressor (10)
Meter delivery temperature, if the actual exhaust air temperature of described double-stage compressor (10) is less than the pre-of this double-stage compressor (10)
Meter delivery temperature, the air compensation over range of the most described double-stage compressor (10), if described double-stage compressor (10)
Actual exhaust air temperature not less than the anticipated delivery temperature of this double-stage compressor (10), then performs step S20, described step
S20 includes step S22；
Step S22: be adjusted to permit by the coolant quantity to be compressed entering the first order compression set of described double-stage compressor (10)
The minimum of a value permitted, judges that whether the actual exhaust air temperature of described double-stage compressor (10) is less than this double-stage compressor the most again
(10) anticipated delivery temperature, if the actual exhaust air temperature of described double-stage compressor (10) is less than this double-stage compressor
(10) anticipated delivery temperature, the air compensation over range of the most described double-stage compressor (10), if double-stage compressor (10)
Actual exhaust air temperature not less than the anticipated delivery temperature of this double-stage compressor (10), the most described double-stage compressor (10)
Air compensation there is no over range.
Determination methods the most according to claim 1, it is characterised in that described step S20 also includes:
Step S21: the actual exhaust air amount of described double-stage compressor (10) is adjusted to the anticipated of this double-stage compressor (10)
Capacity, judges that the anticipated delivery temperature of described double-stage compressor (10) deducts described double-stage compressor (10) the most again
Whether the difference of actual exhaust air temperature gained is more than preset value, and this preset value is more than zero, if described difference is preset more than described
Value, the air compensation over range of the most described double-stage compressor (10), if described difference is not more than described preset value, then perform
Described step S22.
Determination methods the most according to claim 1, it is characterised in that the anticipated delivery temperature of described double-stage compressor (10) is
50℃。
Determination methods the most according to claim 2, it is characterised in that described preset value is 30 DEG C.
Determination methods the most according to claim 1, it is characterised in that by the aperture of regulation electromagnetic expanding valve (60) by described
The coolant quantity to be compressed entering first order compression is adjusted to the minimum of a value of permission.
Determination methods the most according to claim 1, it is characterised in that described double-stage compressor (10) is carried out the tonifying Qi of tonifying Qi
Refrigerant is produced by flash vessel.
7. the heat transmission equipment of application determination methods according to any one of claim 1 to 6, it is characterised in that including:
Double-stage compressor (10), has first order compression set and the second pole compression device, and described first order compression set has
Having refrigerant the first import (11) and refrigerant first to export, described second pole compression device has refrigerant the second import and refrigerant
Two outlets (12), described refrigerant first is exported and is connected with described refrigerant the second import by hybrid chamber；
Outdoor unit heat exchanger (20), has refrigerant first and imports and exports (21) and refrigerant second is imported and exported (22), described refrigerant
First import and export (21) export (12) with described refrigerant the first import (11) and described refrigerant second respectively and are connected, institute
State refrigerant the first import (11) and described refrigerant second exports (12) and all imports and exports (21) with described refrigerant first and have phase
The channel status of connection and the off state blocked mutually；
Indoor set heat exchanger (30), has refrigerant the 3rd and imports and exports (31) and refrigerant the 4th import and export (32), described refrigerant
Second imports and exports (22) is connected with described refrigerant the 3rd import and export (31), and described refrigerant the 4th imports and exports (32) point
Do not export (12) with described refrigerant the first import (11) and described refrigerant second to be connected, described refrigerant the first import (11)
Export (12) with described refrigerant second and all with described refrigerant the 4th import and export (32), there is the channel status and phase being connected
The off state blocked；
Making-up air device (40), has exhaust outlet (41), and described exhaust outlet (41) is connected with described hybrid chamber, described row
Gas port (41) has the channel status being connected and the off state blocked mutually with described hybrid chamber.
Heat transmission equipment the most according to claim 7, it is characterised in that also include:
Reversing arrangement (50), described refrigerant first import and export (21) by this reversing arrangement (50) respectively with described refrigerant
First import (11) exports (12) with described refrigerant second and is connected, and described refrigerant the 4th is imported and exported (32) and changed by this
Export (12) with described refrigerant the first import (11) and described refrigerant second respectively to device (50) to be connected.
Heat transmission equipment the most according to claim 7, it is characterised in that described refrigerant second imports and exports (22) and described refrigerant the
Three import and export connection between (31) electromagnetic expanding valve (60).
Heat transmission equipment the most according to claim 7, it is characterised in that described refrigerant second imports and exports (22) and described refrigerant the
Three import and export connection between (31) has flash vessel, described flash vessel to form described making-up air device (40), and described flash vessel is also
Importing and exporting (42) including refrigerant the 5th and refrigerant the 6th imports and exports (43), described refrigerant the 5th imports and exports (42) with described
Refrigerant second is imported and exported (22) and is connected, and described refrigerant the 6th is imported and exported (43) and imported and exported (31) with described refrigerant the 3rd
It is connected.
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| CN201410441441.5A CN104197595B (en) | 2014-09-01 | 2014-09-01 | Method for judging whether gas supply amount of two-stage compressor exceeds range or not and heat exchange equipment |
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| CN201410441441.5A CN104197595B (en) | 2014-09-01 | 2014-09-01 | Method for judging whether gas supply amount of two-stage compressor exceeds range or not and heat exchange equipment |
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| CN104197595B true CN104197595B (en) | 2016-08-24 |
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| JP6718240B2 (en) * | 2016-01-20 | 2020-07-08 | 三菱重工サーマルシステムズ株式会社 | Refrigeration cycle with multiple multi-stage compressors connected in parallel |
| CN109682100B (en) * | 2018-11-02 | 2020-12-15 | 浙江理工大学 | Utilize spray tube, diffuser pipe to reduce exhaust temperature's doublestage compression refrigerating system |
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| JP2009180426A (en) * | 2008-01-30 | 2009-08-13 | Daikin Ind Ltd | Refrigerating device |
| US9739519B2 (en) * | 2011-07-26 | 2017-08-22 | Carrier Corporation | Startup logic for refrigeration system |
| CN103574852B (en) * | 2012-08-02 | 2016-07-27 | 珠海格力电器股份有限公司 | Air conditioner circulating system and two-stage compressor air compensation amount control method |
| CN103629873B (en) * | 2012-08-23 | 2016-01-27 | 珠海格力节能环保制冷技术研究中心有限公司 | The control method of Two-stage Compression air-conditioning system |
| CN203286821U (en) * | 2013-05-03 | 2013-11-13 | 珠海格力电器股份有限公司 | Two-stage enthalpy-increasing air conditioning system |
| CN203798004U (en) * | 2014-04-15 | 2014-08-27 | 珠海格力电器股份有限公司 | Refrigerating device |
| CN103968460A (en) * | 2014-05-16 | 2014-08-06 | 珠海格力电器股份有限公司 | Air conditioning system |
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