CN103206389A - Multistage refrigeration compressor and middle air supplementation structure thereof - Google Patents
Multistage refrigeration compressor and middle air supplementation structure thereof Download PDFInfo
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- CN103206389A CN103206389A CN2012100103738A CN201210010373A CN103206389A CN 103206389 A CN103206389 A CN 103206389A CN 2012100103738 A CN2012100103738 A CN 2012100103738A CN 201210010373 A CN201210010373 A CN 201210010373A CN 103206389 A CN103206389 A CN 103206389A
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Abstract
The invention provides a middle air supplementation structure of a multistage refrigeration compressor. The middle air supplementation structure comprises an air supplementation mechanism, wherein the air supplementation mechanism comprises a first air inlet channel, a second air inlet channel and a mixing chamber; the first air inlet channel and the second air inlet channel are respectively communicated with the first end of the mixing chamber; the first air inlet channel is connected with an economizer of the multistage refrigeration compressor; the second air inlet channel is connected with an outlet of an impeller of the multistage refrigeration compressor; the second end of the mixing chamber is connected with an inlet of an next grade impeller of the impeller; and an air flow injection included angle between the first air inlet channel and the mixing chamber is 30-90 degrees. According to the middle air supplementation structure of the multistage refrigeration compressor, an air supplementation flow channel is designed to sufficiently and uniformly mix low-temperature refrigerant steam obtained by flashing in the economizer with high-temperature refrigerant steam from certain grade of the impeller, so that the temperature of inlet air entering the next grade impeller of the certain grade of the impeller is reduced, and the efficiency of the compressor is improved.
Description
Technical field
The present invention relates to the refrigeration compressor field, more specifically, relate to a kind of multi-stage refrigerating compressor and middle gas supplementary structure thereof.
Background technique
Refrigeration compressor of the prior art (particularly centrifugal refrigeration compressor) adopts the above impeller of two-stage usually in order to reach higher pressure ratio.Further, in order to improve cycle efficiency, adopt the endless form of band economizer usually.In circulation, the compression process of refrigeration agent is divided into two stages and carries out (being example with the both stage impellers): at first, come the low pressure refrigerant vapor of from evaporator drier to be compressed to intermediate pressure by first order impeller; Then, steam is obtained the cooling of low-temperature refrigerant steam from the economizer shwoot, enter then and further compress in the next stage impeller until reaching condensing pressure, enters condenser at last.In the endless form in the prior art, normally shwoot is obtained low-temperature refrigerant steam and directly introduce main runner so that high temperature refrigerant steam is cooled off, but can cause adverse effect to the airflow homogeneity of this next stage impeller eye like this, cause the mobile non-uniform phenomenon of this next stage impeller inside, surge takes place easily, and can cause the not high problem of compressor efficiency.
Summary of the invention
The present invention aims to provide a kind of multi-stage refrigerating compressor and middle gas supplementary structure thereof, with the refrigerant vapour of the secondary impeller inside of the multi-stage refrigerating compressor that solves prior art flow non-uniform phenomenon and the low problem of compressor efficiency.
For solving the problems of the technologies described above, according to an aspect of the present invention, provide a kind of middle gas supplementary structure of multi-stage refrigerating compressor, comprising: air supply mechanism, air supply mechanism comprise first gas-entered passageway, second gas-entered passageway, mixing chamber; First gas-entered passageway and second gas-entered passageway are communicated with first end of mixing chamber respectively; First gas-entered passageway is connected with the economizer of multi-stage refrigerating compressor; Second gas-entered passageway is connected with the outlet of an impeller of multi-stage refrigerating compressor, and second end of mixing chamber is connected with the import of the next stage impeller of this impeller; Air-flow incident angle between first gas-entered passageway and the mixing chamber is 30～90 °.
Further, air supply mechanism is arranged on the position between this impeller and the next stage impeller.
Further, air supply mechanism comprises return channel and the Embedded Division of the annular that matches with return channel; Form the gap between return channel and Embedded Division, second gas-entered passageway and mixing chamber are formed in the gap successively.
Further, first gas-entered passageway is arranged on the Embedded Division.
Further, first gas-entered passageway is ring-type.
Further, the section area of first gas-entered passageway is along successively decreasing towards the direction of mixing chamber.
Further, the export department of first gas-entered passageway has annular gap, and first gas-entered passageway is communicated with by annular gap with mixing chamber.
Further, the inwall of first gas-entered passageway is streamlined, and first gas-entered passageway comprises one along linearly extended entrance part, export department and a kink that connects into oral area and export department that extends along curve.
Further, first gas-entered passageway is connected by pipeline with economizer, and pipeline is provided with modulating valve.
Further, air-flow incident angle is 60～70 °.
According to another aspect of the present invention, provide a kind of multi-stage refrigerating compressor, it comprises multi-stage impeller, is provided with above-mentioned middle gas supplementary structure between the adjacent both stage impellers at least one place.
The low-temperature refrigerant steam that the present invention gets shwoot in the economizer by tonifying Qi runner design fully mixes with the high temperature refrigerant steam from certain one-level impeller, thereby reduced the intake temperature of the next stage impeller that enters this certain one-level impeller, and improved compressor efficiency.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not constitute improper restriction of the present invention.In the accompanying drawings:
Fig. 1 has schematically shown structural representation of the present invention.
Reference character among the figure: 1, economizer; 2, modulating valve; 3, next stage impeller; 4, air supply mechanism; 5, impeller; 41, Embedded Division; 42, return channel; 43, second gas-entered passageway; 44, mixing chamber; 46, gap; 411, first wall; 412, second wall; 413, first gas-entered passageway; 414, export department; 415, entrance part.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
As one aspect of the present invention, the invention provides a kind of middle gas supplementary structure of multi-stage refrigerating compressor.As shown in Figure 1, this centre gas supplementary structure comprises: air supply mechanism 4, air supply mechanism 4 comprise first gas-entered passageway 413, second gas-entered passageway 43, mixing chamber 44; Wherein, first gas-entered passageway 413 and second gas-entered passageway 43 are communicated with first end of mixing chamber 44 respectively; First gas-entered passageway 413 is connected with the economizer 1 of multi-stage refrigerating compressor; Second gas-entered passageway 43 is connected with the outlet of an impeller 5 of multi-stage refrigerating compressor, and second end of mixing chamber 44 is connected with the import of the next stage impeller 3 of this impeller 5.Air-flow incident included angle A between first gas-entered passageway 413 and the mixing chamber 44 is 30～90 °, preferably, is 60～70 °.As shown in Figure 1, be provided with certain one-level impeller 5 of multi-stage refrigerating compressor in a side of air supply mechanism 4, be provided with the next stage impeller 3 of this certain one-level impeller 5 at the opposite side of air supply mechanism 4, be that air supply mechanism 4 is arranged between the both stage impellers, therefore for guaranteeing enough installing spaces are arranged, may need to increase a little the axial distance between the both stage impellers.Because first gas-entered passageway 413 (when particularly this first gas-entered passageway 413 is for annular housing) has bigger flow area, thereby can effectively reduce the flow velocity of incoming flow, mobile, the pressure distribution of incoming flow in first gas-entered passageway 413 is tending towards evenly, thereby avoids evenly flowing of mixed refrigerant vapours in the mixing chamber 44 caused adverse effect.Therefore, the low-temperature refrigerant steam that this centre gas supplementary structure can get shwoot in the economizer with fully mix from the high temperature refrigerant steam of this certain one-level impeller, thereby reduced the intake temperature that enters this next stage impeller, and improved compressor efficiency (compressor efficiency can be improved about 5%).Especially, the gas supplementary structure among the present invention is applicable to twin-stage or multistage compressor (particularly multistage centrifugal compressor).
As shown in Figure 1, preferably, air supply mechanism 4 comprises return channel 42 and the Embedded Division 41 (preferably, this annular is 360 °) of the annular that matches with return channel 42; Formation gap 46, the second gas-entered passageways 43, mixing chamber 44 are formed in the gap 46 successively between return channel 42 and Embedded Division 41.Preferably, first gas-entered passageway 413 is arranged on the Embedded Division 41, thereby makes Embedded Division 41 be divided into first wall 411 and second wall 412 by first gas-entered passageway 413, forms this first gas-entered passageway 413 between first wall 411 and second wall 412.Preferably, the inwall of first gas-entered passageway 413 is streamlined, and first gas-entered passageway 413 comprises one along linearly extended entrance part 415, export department 414 and a kink that connects into oral area 415 and export department that extends along curve; Especially, the section area of first gas-entered passageway 413 is along successively decreasing towards the direction of mixing chamber 44, and further, first gas-entered passageway 413 is ring-types.Preferably, described streamlined employing fluid analysis software analysis design, but adopt flowing velocity and the direction of fairshaped inwall standard fluid, make the low-temperature refrigerant steam that shwoot gets in the economizer flow into mixing chamber 44 with the less angle that becomes a mandarin, thereby reduced low-temperature refrigerant steam and the impact loss of high temperature refrigerant steam when mixing.By above-mentioned reasonable flow channel design, can reach even tonifying Qi and the purpose of the loss that cuts down the consumption of energy.
During use, can earlier Embedded Division 41 be placed a side of return channel 42, and then above-mentioned next stage impeller 3 is combined with return channel 42, thereby Embedded Division 41 is installed between return channel 42 and the above-mentioned next stage impeller 3.
Preferably, the export department 414 of first gas-entered passageway 413 has annular gap, and first gas-entered passageway 413 and mixing chamber 44 are communicated with by annular gap, owing to adopted narrower annular gap, thereby can improve the flowing velocity of fluid, make the mobile change of fluid more even.As shown in Figure 1, the low-temperature refrigerant steam that shwoot gets in the economizer 1 is entered in first gas-entered passageway 413 by the entrance part 415 of first gas-entered passageway 413, simultaneously, high temperature refrigerant steam from this certain one-level impeller 5 enters air supply mechanism 4 by second gas-entered passageway 43, low-temperature refrigerant steam and high temperature refrigerant steam mix at the first end place of mixing chamber 44 subsequently, go into this next stage impeller 3 via second end of mixing chamber 44 then.
Preferably, first gas-entered passageway 413 and economizer 1 are connected by pipeline, this pipeline is provided with modulating valve 2, its be used for control enter in the middle of the flow from the low-temperature refrigerant steam of economizer of gas supplementary structure, thereby the intake temperature of the impeller of control next stage impeller 3 is to adapt to designing requirement.Preferably, modulating valve 2 is electric expansion valves.
As another aspect of the present invention, the invention provides a kind of multi-stage refrigerating compressor, it comprises multi-stage impeller, is provided with the middle gas supplementary structure in the various embodiments described above between the adjacent both stage impellers at least one place.
The low-temperature refrigerant steam that the present invention gets shwoot in the economizer fully mixes with high temperature refrigerant steam from certain one-level impeller, thereby has reduced the intake temperature of the next stage impeller that enters this certain one-level impeller, and improves compressor efficiency.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the middle gas supplementary structure of a multi-stage refrigerating compressor is characterized in that, comprising:
Air supply mechanism (4), described air supply mechanism (4) comprise first gas-entered passageway (413), second gas-entered passageway (43), mixing chamber (44);
Described first gas-entered passageway (413) and second gas-entered passageway (43) are communicated with first end of described mixing chamber (44) respectively;
Described first gas-entered passageway (413) is connected with the economizer (1) of described multi-stage refrigerating compressor; Described second gas-entered passageway (43) is connected with the outlet of an impeller (5) of described multi-stage refrigerating compressor, and second end of described mixing chamber (44) is connected with the import of the next stage impeller (3) of this described impeller (5);
Air-flow incident angle (A) between described first gas-entered passageway (413) and the described mixing chamber (44) is 30～90 °.
2. middle gas supplementary structure according to claim 1 is characterized in that described air supply mechanism (4) is arranged on the position between this described impeller (5) and the described next stage impeller (3).
3. gas supplementary structure in the middle of according to claim 1 is characterized in that, described air supply mechanism (4) comprises return channel (42) and the Embedded Division (41) of the annular that matches with described return channel (42); Form gap (46) between described return channel (42) and Embedded Division (41), described second gas-entered passageway (43) and mixing chamber (44) are formed in the described gap (46) successively.
4. middle gas supplementary structure according to claim 3 is characterized in that described first gas-entered passageway (413) is arranged on the described Embedded Division (41).
5. middle gas supplementary structure according to claim 3 is characterized in that described first gas-entered passageway (413) is ring-type.
6. middle gas supplementary structure according to claim 3 is characterized in that the section area of described first gas-entered passageway (413) is along successively decreasing towards the direction of described mixing chamber (44).
7. middle gas supplementary structure according to claim 3 is characterized in that the export department (414) of described first gas-entered passageway (413) has annular gap, and described first gas-entered passageway (413) is communicated with by described annular gap with described mixing chamber (44).
8. gas supplementary structure in the middle of according to claim 3, it is characterized in that, the inwall of described first gas-entered passageway (413) is streamlined, and described first gas-entered passageway (413) comprises one along linearly extended entrance part (415), export department (414) and a kink that connects described entrance part (415) and export department (414) along the curve extension.
9. according to each described middle gas supplementary structure among the claim 1-8, it is characterized in that described first gas-entered passageway (413) is connected by pipeline with described economizer (1), described pipeline is provided with modulating valve (2).
10. according to each described middle gas supplementary structure among the claim 1-8, it is characterized in that described air-flow incident angle (A) is 60～70 °.
11. a multi-stage refrigerating compressor, it comprises multi-stage impeller, it is characterized in that, is provided with each described middle gas supplementary structure among the claim 1-10 between the described impeller of the adjacent two-stage at least one place.
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| CN201210010373.8A CN103206389B (en) | 2012-01-12 | 2012-01-12 | Multistage refrigeration compressor and second vapor injection structure thereof |
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| CN201210010373.8A CN103206389B (en) | 2012-01-12 | 2012-01-12 | Multistage refrigeration compressor and second vapor injection structure thereof |
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| CN103206389B CN103206389B (en) | 2015-10-14 |
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Cited By (6)
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| CN104696272A (en) * | 2015-02-16 | 2015-06-10 | 溧阳市超强链条制造有限公司 | Rotor structure |
| CN105240320A (en) * | 2015-10-15 | 2016-01-13 | 珠海格力电器股份有限公司 | Air supplementation structure of centrifugal compressor and compressor |
| WO2016019689A1 (en) * | 2014-08-07 | 2016-02-11 | 珠海格力电器股份有限公司 | Multi-stage compressor and air conditioner |
| US20170306981A1 (en) * | 2014-10-16 | 2017-10-26 | Gree Electric Appliances, Inc. Of Zhuhai | Volute Structure, Centrifugal Compressor and Refrigeration Equipment |
| CN109185180A (en) * | 2018-11-09 | 2019-01-11 | 珠海格力电器股份有限公司 | A kind of centrifugal compressor and air-conditioning system |
| TWI827145B (en) * | 2022-07-15 | 2023-12-21 | 復盛股份有限公司 | Centrifugal compressor |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016019689A1 (en) * | 2014-08-07 | 2016-02-11 | 珠海格力电器股份有限公司 | Multi-stage compressor and air conditioner |
| US20170306981A1 (en) * | 2014-10-16 | 2017-10-26 | Gree Electric Appliances, Inc. Of Zhuhai | Volute Structure, Centrifugal Compressor and Refrigeration Equipment |
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| CN105240320B (en) * | 2015-10-15 | 2019-01-22 | 珠海格力电器股份有限公司 | A kind of centrifugal compressor gas supplementary structure and compressor |
| US10544799B2 (en) | 2015-10-15 | 2020-01-28 | Gree Electric Appliances, Inc. Of Zhuhai | Centrifugal compressor gas-supplementing structure and compressor |
| CN109185180A (en) * | 2018-11-09 | 2019-01-11 | 珠海格力电器股份有限公司 | A kind of centrifugal compressor and air-conditioning system |
| TWI827145B (en) * | 2022-07-15 | 2023-12-21 | 復盛股份有限公司 | Centrifugal compressor |
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