CN103954065B - Refrigerating plant - Google Patents
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- CN103954065B CN103954065B CN201410151056.7A CN201410151056A CN103954065B CN 103954065 B CN103954065 B CN 103954065B CN 201410151056 A CN201410151056 A CN 201410151056A CN 103954065 B CN103954065 B CN 103954065B
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Abstract
The invention provides a kind of refrigerating plant, including multiple compression chambers and making-up air device, multiple compression chambers include main road compression chamber and bypass compression chamber, main road compression chamber includes low pressure compression chamber and the high pressure compressed chamber being serially connected, wherein, the air vent of bypass compression chamber is connected with the air vent in high pressure compressed chamber, and the air vent of making-up air device is connected respectively with the air inlet of bypass compression chamber and the air inlet in high pressure compressed chamber.Refrigerating plant according to the present invention, it is connected with the air vent in high pressure compressed chamber by the air vent of bypass compression chamber, and make the air vent of making-up air device be connected respectively with the air inlet of the air inlet of bypass compression chamber and high pressure compressed chamber, compared to existing technology, realize more multi-operation mode, the problem that breakthrough Two-stage Compression or quasi-two-stage compression refrigerating plant can not get both in efficiency and ability, in heating operations, heating capacity and the coefficient of performance can be significantly improved, in process of refrigerastion, refrigerating capacity and Energy Efficiency Ratio can be significantly improved.
Description
Technical field
The present invention relates to field of air conditioning, in particular to a kind of refrigerating plant.
Background technology
Air source heat pump heating capacity declines decay rapidly with outdoor environment temperature and cannot meet user's request.Existing employing twin-stage
Or quasi-two-stage compression second vapor injection increases enthalpy technology, including not exclusively not exclusively cooling in the middle of cooling and one-level throttling in the middle of two-stage throttling
Circulation, to improve the heating capacity when outdoor temperature is too low and COP, reduces compressor exhaust temperature simultaneously.But existing QI invigorating
Although increase enthalpy technology heating capacity when improving low temperature is had certain effect, but owing to being limited by just arbitrarily downgrade discharge capacity ratio, and efficiency
Preferably discharge capacity is smaller, and heating capacity preferably discharge capacity is bigger, and both can not get both in existing design, it is impossible to meet
The actual application of cold district, causes needing for arranging in indoor auxiliary electro-heat device, increases heating effect, set in indoor
Put auxiliary electro-heat device and there is certain potential safety hazard.
Summary of the invention
It is desirable to provide a kind of refrigerating plant of heating capacity when improving low temperature.
The invention provides a kind of refrigerating plant, including multiple compression chambers and making-up air device, multiple compression chambers include main road compression chamber
With bypass compression chamber, main road compression chamber includes low pressure compression chamber and the high pressure compressed chamber being serially connected, wherein, bypass compression chamber
Air vent is connected with the air vent in high pressure compressed chamber；The air inlet of the air vent of making-up air device and bypass compression chamber and high pressure compressed chamber
Air inlet connect respectively.
Further, refrigerating plant includes vaporizer and condenser, the air vent of bypass compression chamber and the air vent in high pressure compressed chamber
All it is connected with the import of condenser；The outlet of condenser is connected with the import of making-up air device, the outlet of making-up air device and vaporizer
Import connect；The outlet of vaporizer is connected by the air inlet of the first pipeline with low pressure compression chamber.
Further, making-up air device is flash evaporation, and the import of flash evaporation is connected with the outlet of condenser by first throttle device,
The outlet of flash evaporation is connected with the import of vaporizer by the second throttling arrangement, the air vent of flash evaporation and the air inlet of bypass compression chamber
The air inlet in mouth and high pressure compressed chamber connects respectively.
Further, making-up air device is economizer, and economizer includes the first mutually isolated refrigerant chamber and second refrigerant chamber,
The import of the first refrigerant chamber is connected with the outlet of condenser by first throttle device, and the outlet of the first refrigerant chamber is economizer
Air vent, the air vent of economizer is connected respectively with the air inlet of bypass compression chamber and the air inlet in high pressure compressed chamber；Second system
The import in cryogen chamber is connected with the outlet of condenser, the outlet in the second refrigerant chamber import by the second throttling arrangement Yu vaporizer
Connect.
Further, refrigerating plant includes multiple condenser, and multiple condensers are in parallel, and the entering of each condenser and making-up air device
Throttling arrangement it is respectively equipped with between Kou.
Further, refrigerating plant includes that two compressors, two compressors are respectively main road compressor and bypass compressor；Low
Two compression chambers of pressure compression chamber main road compressor corresponding with high pressure compressed chamber；One pressure of bypass compression chamber correspondence bypass compressor
Contracting chamber；The air vent of making-up air device is by the second pipeline and the air inlet of bypass compressor and the 3rd pipeline and the benefit of main road compressor
QI KOU connects respectively, and the second pipeline has been arranged in series the first electromagnetic valve；It has been arranged in series the second electromagnetic valve on 3rd pipeline.
Further, refrigerating plant includes a compressor, and compressor includes three compression chambers；Low pressure compression chamber and high pressure compressed
Two be serially connected in corresponding three compression chambers in chamber, the another one in corresponding three compression chambers of bypass compression chamber；On compressor
There is the first air inlet connected with bypass compression chamber and the second air inlet connected with high pressure compressed chamber；The air vent of making-up air device
Connect and pass through the 3rd pipeline by the second pipeline and the first air inlet and the second air inlet connects, the second pipeline has been arranged in series
First electromagnetic valve；It has been arranged in series the second electromagnetic valve on 3rd pipeline.
Further, it is provided with the 3rd electromagnetic valve between air vent and the air entry in auxiliary compression chamber in high pressure compressed chamber；Close the
One electromagnetic valve, opens the 3rd electromagnetic valve and is pulled open by the slide plate of bypass compression chamber and carry out variable volume unloading；Open the second electromagnetic valve to main road
Compression chamber carries out QI invigorating, or main road compression chamber is not carried out QI invigorating by cut out the second electromagnetic valve.
Further, the discharge capacity of low pressure compression chamber is VA, the discharge capacity in high pressure compressed chamber is VB, the discharge capacity of bypass compression chamber is VC；
When refrigerating plant uses R410A, R290 or R32 cold-producing medium, or containing R32 Yu R1234yf or R32 and R1234ze
Mix refrigerant time；0.5≤VB/VA≤ 1.0,0.65≤(VC+VB)/VA≤2.5.Preferably, 0.7≤VB/VA≤ 0.9,
0.9≤(VC+VB)/VA≤ 1.5 effects are preferable.
According to the refrigerating plant of the present invention, the air vent of air vent with high pressure compressed chamber by making bypass compression chamber is connected, and makes
The air vent of making-up air device is connected respectively with the air inlet of bypass compression chamber and the air inlet in high pressure compressed chamber, compared to existing technology,
Realize more multi-operation mode, break through Two-stage Compression or problem that quasi-two-stage compression refrigerating plant can not get both in efficiency and ability,
In heating operations, heating capacity and the coefficient of performance can be significantly improved, in process of refrigerastion, refrigerating capacity and energy can be significantly improved
Effect ratio.
Accompanying drawing explanation
The accompanying drawing of the part constituting the application is used for providing a further understanding of the present invention, the illustrative examples of the present invention and
Its explanation is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the system schematic of the first embodiment of the refrigerating plant according to the present invention；
Fig. 2 is the system schematic of the second embodiment of the refrigerating plant according to the present invention；
Fig. 3 is the system schematic of the 3rd embodiment of the refrigerating plant according to the present invention；
Fig. 4 is the system schematic of the 4th embodiment of the refrigerating plant according to the present invention；
Fig. 5 is the system schematic of the 5th embodiment of the refrigerating plant according to the present invention；
Fig. 6 a is the schematic diagram of the first mode of operation of the refrigerating plant in the first to five embodiment according to the present invention；
Fig. 6 b is the schematic diagram of the second mode of operation of the refrigerating plant in the first to five embodiment according to the present invention；
Fig. 6 c is the schematic diagram of the third mode of operation of the refrigerating plant in the first to five embodiment according to the present invention；
Fig. 6 d is the schematic diagram of the 4th kind of mode of operation of the refrigerating plant in the first to five embodiment according to the present invention.
Detailed description of the invention
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As Fig. 1 is to shown in 5, according to the refrigerating plant of the present invention, including multiple compression chambers and making-up air device 5, multiple compression chamber bags
Including main road compression chamber and bypass compression chamber, main road compression chamber includes low pressure compression chamber and the high pressure compressed chamber being serially connected, wherein,
The air vent of bypass compression chamber is connected with the air vent in high pressure compressed chamber；The air vent of making-up air device 5 and the air inlet of bypass compression chamber
The air inlet in mouth and high pressure compressed chamber connects respectively.By the present invention in that the air vent of bypass compression chamber and the aerofluxus in high pressure compressed chamber
Mouth connects, and makes the air vent of making-up air device 5 be connected respectively with the air inlet of the air inlet of bypass compression chamber and high pressure compressed chamber,
Compared to existing technology, it is achieved more multi-operation mode, Two-stage Compression or quasi-two-stage compression refrigerating plant are broken through in efficiency and ability not
The problem that can get both, in heating operations, can significantly improve heating capacity and the coefficient of performance, in process of refrigerastion, and can be notable
Improve refrigerating capacity and Energy Efficiency Ratio.
Specifically, as it is shown in figure 1, in the first embodiment of the refrigerating plant of the present invention, refrigerating plant includes two compressors,
I.e. main road compressor 101 and bypass compressor 102, usually, main road compressor 101 is the birotor pressure with second vapor injection mouth
Contracting machine or accurate two grades of screw compressors, bypass compressor 102 is rotor compressor.Correspondingly, low pressure compression chamber and high pressure compressed
Two compression chambers of chamber correspondence main road compressor 101, a compression chamber of bypass compression chamber correspondence bypass compressor 102.QI invigorating
The air vent of device 5 is connected with the air inlet of bypass compressor 102 and the gas supplementing opening of main road compressor 101 respectively by pipeline,
And on pipeline, it is arranged in series the first electromagnetic valve 901 control, to bypass compressor 102 air inlet, to arrange the second electromagnetic valve 902
Control high pressure compressed chamber QI invigorating.In the first embodiment, making-up air device 5 is flash evaporation, and first segment is passed through in the import of flash evaporation
Stream device 401 is connected with the outlet of condenser 3, and the outlet of flash evaporation is by the import of the second throttling arrangement 402 with vaporizer 2
Connecting, the air vent of flash evaporation is connected respectively with the air inlet of bypass compression chamber and the air inlet in high pressure compressed chamber.
In the first embodiment, cold-producing medium circulates as follows, after the condensed device of main road compressor 101 aerofluxus 3, through
One throttling arrangement 401 enters flash evaporation, and the gas that flash evaporation is separated enters gas supplementing opening and/or the entrance of main road compressor 101
Bypass compressor 102(selects according to different mode of operations)；The liquid that flash evaporation is separated enters through the second throttling arrangement 402
Enter vaporizer 2 evaporate laggard enter main road compressor 101.
In main road compressor 101, the gas-liquid separator 601 through main road compressor 101 enters the system of main road compressor 101
Refrigerant gas enters high pressure pressure after mixing with the refrigerant gas from gas supplementing opening after being compressed into intermediate pressure in low pressure compression chamber
Contracting chamber, and enter condenser 3 from the air vent of main road compressor 101 after being further compressed.In bypass compressor 102, from
The isolated gas of flash evaporation enters the refrigerant gas of bypass compressor 102 through the gas-liquid separator 602 of bypass compressor 102
Enter condenser 3 after being converged by aerofluxus with the high pressure compressed chamber of main road compressor 101 after compressing, enter through first throttle device 401
Isolate gas after entering flash evaporation and completely or partially enter bypass compressor 102.Namely in the present invention, part of refrigerant is successively
Through condenser 3, first throttle device 401, flash evaporation, the second throttling arrangement 402, vaporizer 2 and main road compressor 101
Formation main road circulates；Another part cold-producing medium sequentially passes through condenser 3, first throttle device 401, flash evaporation, bypass compressor
102 form bypass circulation.Vaporizer 2, gas-liquid separator 601, gas-liquid separator 602, main road compressor 101, making-up air device
5 and bypass compressor 102 constitute outdoor unit 7, condenser 3 constitutes indoor unit 8.
As in figure 2 it is shown, a kind of variant that the second embodiment of the present invention is first embodiment, different from first embodiment
It is that in a second embodiment, making-up air device 5 changes to economizer (Intermediate Heat Exchanger) as shown in Figure 2, and economizer includes phase
The first refrigerant chamber isolated mutually and second refrigerant chamber, the import of the first refrigerant chamber is by first throttle device 401 and condensation
The outlet of device 3 connects, the air vent that outlet is economizer of the first refrigerant chamber, the air vent of economizer and bypass compression chamber
The air inlet in air inlet and high pressure compressed chamber connects respectively；The import in second refrigerant chamber is connected with the outlet of condenser 3, and second
The outlet of refrigerant chamber is connected with the import of vaporizer 2 by the second throttling arrangement 402.In a second embodiment, cold-producing medium
Circulate similar with first embodiment, do not repeat them here.
In the first embodiment and the second embodiment, the first electromagnetic valve 901 and the second electromagnetic valve 902 control main road compression respectively
The QI invigorating of machine 101 and the air inlet of bypass compressor 102, thus control the mode of operation of refrigerating plant, thus meet varying environment
Needs, usually, when outdoor ultralow temperature needs strength to heat, open the first electromagnetic valve 901 and the second electromagnetic valve 902, outdoor
Low temperature strength heating mode or for air-conditioning time outdoor high temperature strength refrigeration mode time, the first electromagnetic valve 901 and the second electromagnetic valve 902
Middle alternative one is opened, and the two is closed.Outdoor high temperature heats or cryogenic refrigeration pattern in outdoor closes the first electricity when air-conditioning
Magnet valve 901 and the second electromagnetic valve 902, need to shift to an earlier date when closing the first electromagnetic valve 901 or close synchronously bypass compressor 102.
The i.e. refrigerating plant of first and second embodiments of the present invention can be selected by the first electromagnetic valve 901 and the second electromagnetic valve 902
Select switching, thus realize four kinds of change discharge capacity operational modes as shown in Fig. 6 a to 6d, compress in conjunction with main road compressor 101 and bypass
The VFC of machine 102 is such that it is able to realize the regulating effect of optimal efficiency or optimum capacity, compared with prior art, permissible
The ability being obviously improved under bad working environments can also be obviously improved the efficiency under conventional operating mode simultaneously.
As it is shown on figure 3, the third embodiment of the present invention is also a kind of variant of first embodiment, different from first embodiment
, in the third embodiment, the bypass compressor of first embodiment is reduced to a compression of compressor 1 as shown in Figure 3
Chamber.The most in the third embodiment, refrigerating plant only one of which compressor 1, compressor 1 includes three compression chambers, main road compression chamber
Low pressure compression chamber three compression chambers corresponding with high pressure compressed chamber in be serially connected two, corresponding three compression chambers of bypass compression chamber
In another one.Gas-liquid separator 6 instead of gas-liquid separator 601 and the gas-liquid separator 602 of embodiment one.3rd implements
Example also add the 3rd electromagnetic valve 903, as it is shown on figure 3, the 3rd electromagnetic valve 903 two ends pipeline connects high pressure compressed chamber respectively
Air vent and the air entry in auxiliary compression chamber.In the third embodiment, making-up air device 5 is also adopted by flash evaporation, its connected mode with
Refrigerant cycle is all similar with first embodiment, controls bypass pressure respectively by the first electromagnetic valve 901 and the second electromagnetic valve 902
The air inlet in contracting chamber and the QI invigorating in high pressure compressed chamber, do not repeating at this.In the third embodiment, due to bypass compression chamber and main road
Compression chamber coaxial also common motor and controller thereof, relative reduction cost, thus control more convenient.Vaporizer 2, gas-liquid separator
6, compressor 1 and making-up air device 5 constitute outdoor unit 7, and condenser 3 constitutes indoor unit 8.
As shown in Figure 4, the fourth embodiment of the present invention is a kind of variant of the 3rd embodiment, different from the 3rd embodiment
That in the fourth embodiment, making-up air device 5 changes to economizer (Intermediate Heat Exchanger) as shown in Figure 4, its connected mode with
Refrigerant cycle is all similar with the 3rd embodiment, does not repeats them here.In the refrigerating plant of the 3rd embodiment and the 4th embodiment,
Can be realized as shown in Fig. 6 a to 6d by the switching of first electromagnetic valve the 901, second electromagnetic valve 902 and the 3rd electromagnetic valve 903
Four kinds of different working modes.Specifically, the 3rd electromagnetic valve 903 in Fig. 3, the first electromagnetic valve 901 and the second electromagnetic valve are closed
902 open, thus realize the mode of operation shown in Fig. 6 a, be further turned off the second electromagnetic valve 902 and then realize on aforementioned base
Mode of operation shown in Fig. 6 c, closes the first electromagnetic valve 901 in Fig. 3 and opens the 3rd electromagnetic valve 903 by bypass compression chamber
Slide plate pulls open and carries out variable volume unloading, is dallied no longer suction and discharge by bypass compression chamber after variable volume unloading, thus realizes as shown in Figure 6 b
Main road compression chamber QI invigorating mode of operation, the second electromagnetic valve 902 being further turned off on aforementioned base in Fig. 3 i.e. realizes Fig. 6 d institute
The main road compression chamber not QI invigorating mode of operation shown.Two-stage Compression in compared to existing technology or quasi-two-stage compression refrigerating plant, this
The refrigerating plant of the third and fourth bright embodiment becomes discharge capacity operational mode owing to having four kinds, and the frequency conversion in conjunction with compressor 1 is permissible
Realizing the regulating effect of optimal efficiency or optimum capacity, the ability can being obviously improved under bad working environments can also be obviously improved simultaneously
Efficiency under conventional operating mode.
As it is shown in figure 5, a kind of variant that the fifth embodiment of the present invention is the 3rd embodiment shown in Fig. 3, real with the 3rd
Executing unlike example, in the 5th embodiment, have two separate indoor units 801 and 802, each indoor unit is by one
Individual condenser 3 and the first throttle device 401 being connected on condenser 3 outlet are constituted, and each indoor unit is connected on compressor 1
Air vent and the import of flash evaporation between.The refrigerating plant of the fifth embodiment of the present invention has four kinds of the 3rd embodiment equally
Become discharge capacity operational mode and similar effect.
It should be noted that the more preferably embodiment only enumerated in each above-mentioned embodiment, those skilled in the art will be each
Distinctive points in individual embodiment is mutually combined, simply deduces, replacement etc. is also at scope.
Preferably, in order to make refrigerating plant reach more preferable Energy Efficiency Ratio, the ratio of each compression chamber is also optimized by the present invention,
Concrete, it is respectively V with the discharge capacity of low pressure compression chamber and high pressure compressed chamberAAnd VB, the discharge capacity of bypass compression chamber is VC, for
Use R410A, R290, R32 cold-producing medium and the refrigerating plant of the mix refrigerant containing R32 Yu R1234yf or R1234ze,
General VB/VABetween 0.5～1.0, further optimization range is 0.7～0.9, (VC+VB)/VABetween 0.65～2.5, the most excellent
Change scope is 0.9～1.5.
The flash evaporation of refrigerating plant of the present invention can be unidirectional flash evaporation or two-way flash evaporation, it is also possible to is that other have QI invigorating
Flash evaporation with liquid function.Unless otherwise indicated, the first throttle device 401 of refrigerating plant of the present invention and the second throttling arrangement 402
Can be capillary tube, restriction sleeve, heating power expansion valve, electric expansion valve, restricting orifice or aforementioned any reasonable combination.According to
Need, those skilled in the art by arranging the parts such as four-way change-over valve of necessity, make the refrigerating plant of the present invention be adapted to refrigeration,
Heat or the application scenario such as water heating, it is also possible to by arranging the ability that the compressor unit of parallel connection promotes the refrigerating plant of the present invention
Scope.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
According to the refrigerating plant of the present invention, the air vent of air vent with high pressure compressed chamber by making bypass compression chamber is connected, and makes
The air vent of making-up air device is connected respectively with the air inlet of bypass compression chamber and the air inlet in high pressure compressed chamber, compared to existing technology,
Realize more multi-operation mode, break through Two-stage Compression or problem that quasi-two-stage compression refrigerating plant can not get both in efficiency and ability,
In heating operations, heating capacity and the coefficient of performance can be significantly improved, in process of refrigerastion, refrigerating capacity and energy can be significantly improved
Effect ratio.
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. a refrigerating plant, including making-up air device (5) and multiple compression chamber, it is characterised in that
The plurality of compression chamber includes main road compression chamber and bypass compression chamber, and described main road compression chamber includes the low pressure being serially connected
Compression chamber and high pressure compressed chamber, wherein, the air vent of described bypass compression chamber is connected with the air vent in described high pressure compressed chamber；
The air inlet of the air vent of described making-up air device (5) and described bypass compression chamber and the air inlet in described high pressure compressed chamber
Connect respectively.
Refrigerating plant the most according to claim 1, it is characterised in that include vaporizer (2) and condenser (3)；
The air vent of described bypass compression chamber and the air vent in described high pressure compressed chamber all with the import phase of described condenser (3)
Connect；
The outlet of described condenser (3) is connected with the import of described making-up air device (5), going out of described making-up air device (5)
Mouth is connected with the import of described vaporizer (2)；
The outlet of described vaporizer (2) is connected by the air inlet of the first pipeline with described low pressure compression chamber.
Refrigerating plant the most according to claim 2, it is characterised in that described making-up air device (5) is flash evaporation,
The import of described flash evaporation is connected with the outlet of described condenser (3) by first throttle device (401), described sudden strain of a muscle
The outlet sending out device is connected by the import of the second throttling arrangement (402) with described vaporizer (2)；
The air vent of described flash evaporation connects respectively with the air inlet of the air inlet of described bypass compression chamber and described high pressure compressed chamber
Connect.
Refrigerating plant the most according to claim 2, it is characterised in that described making-up air device (5) is economizer, described economy
Device includes the first mutually isolated refrigerant chamber and second refrigerant chamber；
The import of described first refrigerant chamber is connected with the outlet of described condenser (3) by first throttle device (401)；
The air vent that outlet is described economizer of described first refrigerant chamber, the air vent of described economizer and described bypass pressure
The air inlet in contracting chamber and the air inlet in described high pressure compressed chamber connect respectively；
The import in described second refrigerant chamber is connected with the outlet of described condenser (3), the outlet in described second refrigerant chamber
It is connected by the import of the second throttling arrangement (402) with described vaporizer (2).
Refrigerating plant the most according to claim 2, it is characterised in that described refrigerating plant includes multiple described condenser,
Multiple described condensers are in parallel, and are respectively equipped with throttling dress between each described condenser and the import of described making-up air device
Put.
6. according to the refrigerating plant described in claim 3 or 4, it is characterised in that
Described refrigerating plant includes that two compressors, two described compressors are respectively main road compressor (101) and bypass pressure
Contracting machine (102)；
Two compression chambers of described low pressure compression chamber described main road compressor (101) corresponding with high pressure compressed chamber；
One compression chamber of the corresponding described bypass compressor (102) of described bypass compression chamber；
The air vent of described making-up air device (5) is by the air inlet and the 3rd of the second pipeline with described bypass compressor (102)
Pipeline is connected respectively with the gas supplementing opening of described main road compressor (101), and described second pipeline has been arranged in series the first electromagnetism
Valve (901)；It has been arranged in series the second electromagnetic valve (902) on described 3rd pipeline.
7. according to the refrigerating plant described in claim 3 or 4, it is characterised in that
Described refrigerating plant includes a compressor, and described compressor includes three compression chambers；
Two be serially connected in described low pressure compression chamber described three compression chambers corresponding with high pressure compressed chamber, described bypass compresses
Another one in corresponding described three compression chambers in chamber；
There is on described compressor the first air inlet connected with described bypass compression chamber and connect with described high pressure compressed chamber
Second air inlet；The air vent of described making-up air device (5) is connected with described first air inlet by the second pipeline and passes through the
Three pipelines are connected with described second air inlet, and described second pipeline has been arranged in series the first electromagnetic valve (901)；Described 3rd
The second electromagnetic valve (902) it has been arranged in series on pipeline.
Refrigerating plant the most according to claim 7, it is characterised in that
It is provided with the 3rd electromagnetic valve between the air vent and the air entry in auxiliary compression chamber in described high pressure compressed chamber
(903)；
Close described first electromagnetic valve (901), open described 3rd electromagnetic valve (903) by described bypass compression chamber
Slide plate pull open and carry out variable volume unloading；
Open described second electromagnetic valve (902) and described main road compression chamber is carried out QI invigorating, or close described second
Electromagnetic valve (902) does not carry out QI invigorating to described main road compression chamber.
9. according to the refrigerating plant described in claim 3 or 4, it is characterised in that
The discharge capacity of described low pressure compression chamber is VA, the discharge capacity in described high pressure compressed chamber is VB, the discharge capacity of described bypass compression chamber
For VC；When described refrigerating plant uses R410A, R290 or R32 cold-producing medium, or containing R32 and R1234yf
Or during R32 Yu R1234ze mix refrigerant, 0.5≤VB/VA≤ 1.0,0.65≤(VC+VB)/VA≤2.5。
Refrigerating plant the most according to claim 9, it is characterised in that
0.7≤VB/VA≤ 0.9,0.9≤(VC+VB)/VA≤1.5。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410151056.7A CN103954065B (en) | 2014-04-15 | 2014-04-15 | Refrigerating plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410151056.7A CN103954065B (en) | 2014-04-15 | 2014-04-15 | Refrigerating plant |
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| CN103954065A CN103954065A (en) | 2014-07-30 |
| CN103954065B true CN103954065B (en) | 2016-10-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107560210B (en) * | 2017-08-21 | 2023-11-03 | 珠海格力电器股份有限公司 | Refrigerating system |
| CN109209812A (en) * | 2018-09-12 | 2019-01-15 | 珠海格力电器股份有限公司 | A kind of compressor and air-conditioning system and fresh air system |
| CN109539629A (en) * | 2018-11-15 | 2019-03-29 | 珠海格力电器股份有限公司 | A kind of heat-pump apparatus |
| CN109855322A (en) * | 2019-02-21 | 2019-06-07 | 珠海格力电器股份有限公司 | A kind of throttling method and unit of the unit improving heat exchange efficiency |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7275385B2 (en) * | 2005-08-22 | 2007-10-02 | Emerson Climate Technologies, Inc. | Compressor with vapor injection system |
| CN101487470A (en) * | 2008-12-19 | 2009-07-22 | 武汉凯龙技术开发有限责任公司 | Double-machine two-stage screw type low-temperature compressor unit |
| CN203203289U (en) * | 2013-04-09 | 2013-09-18 | 珠海格力电器股份有限公司 | Air conditioner |
| CN203798004U (en) * | 2014-04-15 | 2014-08-27 | 珠海格力电器股份有限公司 | Refrigerating device |
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