CN202041016U - Centrifugal unit - Google Patents
Centrifugal unit Download PDFInfo
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- CN202041016U CN202041016U CN201120091640XU CN201120091640U CN202041016U CN 202041016 U CN202041016 U CN 202041016U CN 201120091640X U CN201120091640X U CN 201120091640XU CN 201120091640 U CN201120091640 U CN 201120091640U CN 202041016 U CN202041016 U CN 202041016U
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- condenser
- compressor
- low pressure
- pressure compressor
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Abstract
The utility model provides a centrifugal unit, which comprises an evaporator, a low pressure compressor and a condenser which are mutually connected, and also comprises a high pressure compressor connected in series with the low pressure compressor in a twin-stage manner, and an economizer connected between the condenser and the evaporator, wherein a first valve body K1 is arranged between the low pressure compressor and the condenser; a second valve body K2 is connected and arranged between the low pressure compressor and the economizer; and a third valve body K3 is arranged between the high pressure compressor and the condenser. Further, a throttling device is arranged between the condenser and the evaporator; a high pressure throttling valve is arranged between the condenser and the economizer; and a low pressure throttling valve is arranged between the economizer and the evaporator. The centrifugal unit provided by the utility model can simultaneously perform the functions of refrigeration, heating and ice thermal storage, so the usable range of the centrifugal cold water unit is expanded.
Description
[technical field]
The utility model relates to field of air conditioning, refers in particular to a kind of centrifugal unit.
[background technology]
Along with economic development, the domestic city scale progressively increases, and the original heating system in city can't satisfy existing demand, and it is high and pollute few advantage to utilize heat pump heat supply to have efficient, is progressively accepted by people.Central heating is taked in city, the north more, and centrifugal unit refrigeration and the big advantage of heating capacity can better be brought into play.Centrifugal unit is owing to have big cold, high performance advantage, be widely used in large scale business, industrial site, but himself characteristic decision centrifugal compressor can only bear less pressure ratio, can only realize single cold pattern, exist and to realize the shortcoming that heats and ice cool storage function can not satisfying existing demand.And, what most of centrifugal units adopted all is that two conventional compressors are connected, because self there is an optimum pressure ratio operating point in conventional centrifugal compressor, if two of series connection all is conventional compressor, depart from the optimum pressure ratio operating point when then causing compressor operating easily, the compressor adiabatic efficiency is obviously descended.
[summary of the invention]
The purpose of this utility model is to provide a kind of and can realizes simultaneously freezing, the centrifugal unit of heat-production functions.
For realizing the utility model purpose, provide following technical scheme:
The utility model provides a kind of centrifugal unit, it comprises evaporimeter, low pressure compressor and the condenser that is connected, be provided with throttling arrangement between this condenser and the evaporimeter, it also comprises the high pressure compressor of realizing double stage tandem with low pressure compressor, and be connected economizer between condenser and the evaporimeter, be provided with the first valve body K1 between this low pressure compressor and the condenser, be connected between this low pressure compressor and the economizer and be provided with the second valve body K2, be provided with the 3rd valve body K3 between this high pressure compressor and the condenser.
The present invention is a kind of centrifugal unit of high pressure ratio of two-shipper head series connection, can realize refrigeration simultaneously, heats or ice cool storage function.During separate refrigeration, only allow the low pressure compressor operation; Heat or when icing cold-storage low pressure compressor and high pressure compressor series operation.
Preferably, the described first valve body K1, the second valve body K2 and the 3rd valve body K3 are stop valve.This stop valve is realized the break-make of pipeline easily, and control is got up rapider, more convenient and more effective.
Preferably, be provided with the high pressure choke valve between described condenser and the economizer, be provided with the low pressure choke valve between economizer and the evaporimeter.Make system more perfect, can the refrigerant in the system be control effectively.
Preferably, this low pressure compressor generally adopts conventional refrigeration compressor, high pressure compressor redesigns according to high pressure ratio real work operating mode, the pressure ratio scope that adopts pressure at expulsion and pressure of inspiration(Pi) is 1.2 to 2.6 little pressure ratio compressor, can guarantee that two compressors all can realize higher adiabatic efficiency.
The concrete operation principle of the centrifugal unit of the utility model is as follows:
During refrigeration mode, K2, K3 close, and K1 opens, and high pressure choke valve and low pressure choke valve are stopped using, and refrigerant enters the low pressure compressor compression through evaporimeter, enters condenser condenses, enters evaporator evaporation after the choke valve throttling, finishes kind of refrigeration cycle.
When heating/icing the cold-storage pattern, K2, K3 open, K1 closes, and throttling arrangement is stopped using, and refrigerant is after evaporimeter enters the low pressure compressor compression, enter the high pressure compressor compression once more, enter condenser condenses then, enter the economizer shwoot through the high pressure choke valve after the condensation, gaseous coolant becomes the high pressure compressed tonifying Qi behind the shwoot, other liquid refrigerants enter evaporation through the low pressure choke valve, finish whole circulation.
The contrast prior art the utlity model has following advantage:
The centrifugal unit of the utility model can realize freezing, heating, ice cool storage function simultaneously, expands the centrifugal water chillers scope of application; In addition, low pressure compressor adopts different pressure ratios with high pressure compressor, thus when guaranteeing the single-stage refrigeration and twin-stage heat/when icing cold-storage higher adiabatic efficiency can be arranged.
[description of drawings]
Fig. 1 is the structural representation of the centrifugal unit of the utility model.
[specific embodiment]
See also Fig. 1, the utility model is a kind of centrifugal unit of high pressure ratio of two-shipper head series connection, it comprises the evaporimeter 1 that is connected, low pressure compressor 2, condenser 3, be provided with throttling arrangement 13 between condenser 3 and the evaporimeter 1, also comprise the high pressure compressor 4 of realizing double stage tandem with low pressure compressor 2, and be connected economizer 5 between condenser 3 and the evaporimeter 1, be provided with the first valve body K1 between this low pressure compressor 2 and the condenser 3, be connected between this low pressure compressor 2 and the economizer 5 and be provided with the second valve body K2, be provided with the 3rd valve body K3 between this high pressure compressor 4 and the condenser 3, be provided with high pressure choke valve 35 between this condenser 3 and the economizer 5, be provided with low pressure choke valve 15 between this economizer 5 and the evaporimeter 1.Described throttling arrangement 13 can be selected choke valve or capillary throttle pipe etc.The described first valve body K1, the second valve body K2 and the 3rd valve body K3 are stop valve.Described high pressure compressor adopts little pressure ratio compressor, and the pressure ratio scope of the pressure at expulsion of this little pressure ratio compressor and pressure of inspiration(Pi) is 1.2 to 2.6.
Centrifugal compressor can only be realized refrigeration mode at present, can reach pressure ratio and have only 2.6-2.7, generally needs more than 4.0 and heat or ice cold-storage operating mode pressure ratio, therefore needs double-compressor series connection compression.Because what most of centrifugal units adopted all is that two conventional compressors are connected, because self there is an optimum pressure ratio operating point in conventional centrifugal compressor, if two of series connection all is conventional compressor, depart from the optimum pressure ratio operating point when then causing compressor operating easily, the compressor adiabatic efficiency is obviously descended.So in the present embodiment, this high pressure compressor adopts little pressure ratio centrifugal compressor, calculation Design impeller according to the actual requirements, thus guarantee that under the series operation operating mode, two compressors all guarantee higher adiabatic efficiency.
During refrigeration mode, K2, K3 close, and K1 opens, and high pressure choke valve and low pressure choke valve are stopped using, and refrigerant enters the low pressure compressor compression through evaporimeter, enters condenser condenses, enters evaporator evaporation after the throttling arrangement throttling, finishes kind of refrigeration cycle; Heat/ice the cold-storage pattern, K2, K3 open, K1 closes, and choke valve is stopped using, and refrigerant is after evaporimeter enters the low pressure compressor compression, enter the high pressure compressor compression once more, enter condenser condenses then, enter the economizer shwoot through the high pressure choke valve after the condensation, gaseous coolant becomes the high pressure compressed tonifying Qi behind the shwoot, other liquid refrigerants enter evaporation through the low pressure choke valve, finish whole circulation.
The above only is preferred embodiment of the present utility model, and protection domain of the present utility model is not limited thereto, and anyly all belongs within the utility model protection domain based on the equivalent transformation on the technical solutions of the utility model.
Claims (5)
1. centrifugal unit, it comprises evaporimeter, low pressure compressor and the condenser that is connected, be provided with throttling arrangement between this condenser and the evaporimeter, it is characterized in that, it also comprises the high pressure compressor of realizing double stage tandem with low pressure compressor, and be connected economizer between condenser and the evaporimeter, be provided with the first valve body K1 between this low pressure compressor and the condenser, be connected between this low pressure compressor and the economizer and be provided with the second valve body K2, be provided with the 3rd valve body K3 between this high pressure compressor and the condenser.
2. centrifugal unit as claimed in claim 1 is characterized in that, the described first valve body K1, the second valve body K2 and the 3rd valve body K3 are stop valve.
3. centrifugal unit as claimed in claim 1 is characterized in that, is provided with the high pressure choke valve between described condenser and the economizer, is provided with the low pressure choke valve between economizer and the evaporimeter.
4. as any described centrifugal unit of claim 1 to 3, it is characterized in that described high pressure compressor adopts little pressure ratio compressor.
5. centrifugal unit as claimed in claim 4 is characterized in that, the pressure ratio scope of the pressure at expulsion of described little pressure ratio compressor and pressure of inspiration(Pi) is 1.2 to 2.6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120091640XU CN202041016U (en) | 2011-03-31 | 2011-03-31 | Centrifugal unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120091640XU CN202041016U (en) | 2011-03-31 | 2011-03-31 | Centrifugal unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202041016U true CN202041016U (en) | 2011-11-16 |
Family
ID=44968457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120091640XU Expired - Lifetime CN202041016U (en) | 2011-03-31 | 2011-03-31 | Centrifugal unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202041016U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335441A (en) * | 2013-07-04 | 2013-10-02 | 天津商业大学 | Secondary throttling middle incomplete cooling variable flow double-stage compression refrigeration system |
| CN103335440A (en) * | 2013-07-04 | 2013-10-02 | 天津商业大学 | Secondary throttling middle complete cooling double-working-condition refrigeration system |
| CN104344610A (en) * | 2013-08-01 | 2015-02-11 | 珠海格力电器股份有限公司 | Air conditioning unit |
| CN111059657A (en) * | 2019-12-11 | 2020-04-24 | 珠海格力电器股份有限公司 | Refrigeration and ice-making air conditioning unit and control method |
-
2011
- 2011-03-31 CN CN201120091640XU patent/CN202041016U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335441A (en) * | 2013-07-04 | 2013-10-02 | 天津商业大学 | Secondary throttling middle incomplete cooling variable flow double-stage compression refrigeration system |
| CN103335440A (en) * | 2013-07-04 | 2013-10-02 | 天津商业大学 | Secondary throttling middle complete cooling double-working-condition refrigeration system |
| CN104344610A (en) * | 2013-08-01 | 2015-02-11 | 珠海格力电器股份有限公司 | Air conditioning unit |
| CN104344610B (en) * | 2013-08-01 | 2016-08-24 | 珠海格力电器股份有限公司 | Air-conditioner set |
| CN111059657A (en) * | 2019-12-11 | 2020-04-24 | 珠海格力电器股份有限公司 | Refrigeration and ice-making air conditioning unit and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111116 |
|
| CX01 | Expiry of patent term |