CN104006563B - Turborefrigerator - Google Patents
Turborefrigerator Download PDFInfo
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- CN104006563B CN104006563B CN201410055037.4A CN201410055037A CN104006563B CN 104006563 B CN104006563 B CN 104006563B CN 201410055037 A CN201410055037 A CN 201410055037A CN 104006563 B CN104006563 B CN 104006563B
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- refrigerant
- motor
- control valve
- turborefrigerator
- temperature
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Abstract
Turborefrigerator provided by the invention, possesses：From condenser（2）The pipe arrangement of side branch that is, from condenser（2）Lateral motor（11）Supply the refrigerant supplying tubing of refrigerant（5BP）, be arranged at refrigerant supplying tubing（5BP）To control the control valve of the refrigerant flow flowed in refrigerant supplying tubing（12）, measurement motor internal temperature temperature sensor（T）And to control valve（12）The control device that is controlled of aperture（10）, control device（10）Based on by temperature sensor（T）The motor measured（11）Internal temperature, to control control valve（12）Aperture, so as to control to motor（11）The refrigerant flow of supply.
Description
Technical field
The present invention relates to turborefrigerator, and driving whirlpool is imported into from kind of refrigeration cycle more particularly to by a part for refrigerant
The motor of wheel compression machine, to cool down the turborefrigerator of the mode of motor.
Background technology
In the past, the turborefrigerator that refrigerating air conditioning device etc. was utilized is made up of the closed system for being sealed with refrigerant, and
It is configured to：Will be from cold water（Cooled fluid）Capture heat so that refrigerant evaporation is so as to playing the evaporator of refrigeration, right
It is compressed by the refrigerant gas of above-mentioned evaporator evaporation to become the compressor of higher pressure refrigerant gas, use cooling water
（Cooling fluid）Higher pressure refrigerant gas is cooled down so that its condensation condenser and to above-mentioned condensed refrigerant
Depressurized so that the expansion valve of its expansion（Expansion mechanism）Linked by refrigerant piping.
Turbo-compressor used in turborefrigerator, use motor together with compressor with sealed shape in most cases
State is accommodated in the semi-hermetic type compressor of the housing of separated type.It is to freeze in most cases in the semi-hermetic type compressor
Condensating refrigerant in circulation（Liquid refrigerant）Motor interior is imported, using the evaporation latent heat of refrigerant come to by motor
Loss caused by heating cooled down.In this case, the driving source that refrigerant is conveyed from condenser to motor is condensation
Device and motor（Evaporator）Pressure differential.That is, the refrigerant amount for being delivered to motor depends on the operating condition of refrigeration machine, i.e.,
The pressure differential of condenser and evaporator（Also the temperature difference of cooling water and cold water can be shown as）.Therefore supply to the system of motor
Cryogen amount turns into " exceeding ".If cooling refrigerant is supplied to the liquid system for carrying out condenser to motor beyond necessary amount
The major part of cryogen is dredged to evaporator, so as in the case where compressor suction air quantity is not abundant, cause refrigerating capacity to drop
It is low.Even if in addition, in the case where compressor suction air quantity is abundant, unnecessary compression power is also consumed, is as a result likely to become system
The reason for efficiency of cold reduces.
In the case of using economizer cycle, the liquid refrigerant of dredging is only the part of energy-saving appliance effect, thus is made
Cold effect reduces.
Fig. 3 is that the liquid refrigerant for representing glut to motor is back to energy-saving appliance effect drop in the case of evaporator
The Mollier line chart of lower part.As shown in figure 3, the liquid refrigerant in glut to motor is back to the situation of evaporator
Under, the refrigeration realized by energy-saving appliance can be lost by the part of Fig. 3 oblique line portion expression, so as to cause refrigerating capacity to drop
It is low.
Patent document 1：Japanese Unexamined Patent Application 57-95152 publications
The content of the invention
The present invention is to complete in view of the foregoing, and it is an object of the present invention to provide a kind of turborefrigerator, by making to be used as drive
The cooling refrigerant of the motor of dynamic turbo-compressor, from kind of refrigeration cycle supply to the refrigerant of motor refrigerant amount most
Goodization, thus, it is possible to suitably be cooled down to motor without excessive or deficiency, so as to prevent the efficiency of refrigeration machine
Reduce.
In order to realize above-mentioned purpose, turborefrigerator of the invention, possess：Capture heat from cold water and steam refrigerant
Send play refrigeration evaporator, using impeller come the turbo-compressor of compression refrigerant, drive turbo-compressor electricity
Motivation and the condenser for being cooled down and being made it to condense to the refrigerant gas compressed with cooling water, the turbine refrigeration
Machine is characterised by possessing：Pipe arrangement from condenser side branch that is, the supply refrigerant from condenser side to the motor
Refrigerant supplying tubing；The refrigerant supplying tubing is arranged at, to the cold-producing medium stream flowed in the refrigerant supplying tubing
Measure the control valve being controlled；Measure the temperature measurement unit of the internal temperature of the motor；And the control control valve
Aperture control device, inside temperature of the control device based on the motor measured by the temperature measurement unit
Spend to control the aperture of the control valve, thus the refrigerant flow supplied to the motor is controlled.
According to the present invention, in turborefrigerator operation process, the internal temperature of the motor to driving turbo-compressor
Measure, measurement signal is sent to control device successively.In control device, the inside temperature based on the motor measured
Spend and the aperture of control valve is controlled, so as to control what is supplied from condenser side via refrigerant supplying tubing to motor
The flow of condensating refrigerant.So, supply is made in a manner of the caloric value with motor matches to the condensating refrigerant of motor
Refrigerant amount optimize, thus, it is possible to suitably be cooled down to motor without excessive or deficiency.Terminate to motor
Cooling gas refrigerant, be recycled to evaporator via loopback pipe arrangement.
According to the preferable mode of the present invention, it is characterised in that the turbo-compressor is made up of multistage turbocompressor,
The turborefrigerator possesses the energy-conservation of the center section supply refrigerant gas of the multi-stage compression level to multistage turbocompressor
Device.
The refrigerant gas separated by energy-saving appliance is imported into the more of multistage turbocompressor in accordance with the invention it is possible to build
The economizer cycle of the center section of level compression stage, therefore the refrigeration part realized by energy-saving appliance is attached with, therefore can
Increase the refrigeration of the part, realize high efficiency.Moreover, in economizer cycle, in order to be cooled down to motor and
The liquid refrigerant being supplied to will not be excessive, therefore the state of affairs that liquid refrigerant returns to evaporator will not occur.Therefore can
Suppress the reduction of energy-saving appliance effect or be allowed to be zero, so as to realize the efficiency for improving refrigeration machine.
According to the preferable mode of the present invention, it is characterised in that stator of the temperature measurement unit to the motor
Temperature near unshakable in one's determination or stator core measures.
Stator core, stator coil end are the parts of the motor interior highest temperature, therefore temperature measurement unit preferred pair
Stator core, the temperature of stator coil end measure.Moreover, temperature measurement unit be preferably provided at measurement temperature with it is electronic
The rated current of machine than the higher position of the degree of correlation.According to the experiment of the present inventor, it is thus identified that stator core temperature with it is specified
Electric current is than showing higher correlation, and so as to temperature measurement unit, be arranged on can be to the temperature near stator core or stator core
Spend the position measured.
According to the preferable mode of the present invention, it is characterised in that the control valve is disposed proximate to the position of the motor
Put.
According to the present invention, the installation site of electric-type control valve is in refrigerant supplying tubing close to motor
Side is preferably.Because control valve is formed as throttle mechanism, therefore liquid refrigerant overflows and turned into compressor two level side
The two-phase flow of refrigerant, it is possible to hindering the flowing of refrigerant.
According to the preferable mode of the present invention, it is characterised in that the temperature measurement unit is thermocouple.
The present invention plays the effect being exemplified below.
（1）By the cooling refrigerant for the motor for making to be used as driving turbo-compressor, supplied from kind of refrigeration cycle to electricity
The refrigerant amount of the refrigerant of motivation optimizes, thus, it is possible to suitably be cooled down to motor without excessive or deficiency,
So as to prevent the efficiency of refrigeration machine from reducing.
（2）In possessing the economizer cycle of energy-saving appliance, for the liquid refrigeration for being cooled down and being supplied to motor
Agent will not be excessive, therefore the state of affairs that liquid refrigerant returns to evaporator will not occur.Therefore energy-saving appliance effect can be suppressed
Reduce or be allowed to be zero, so as to realize the efficiency for improving refrigeration machine.
Brief description of the drawings
Fig. 1 is the schematic diagram for the first embodiment for representing turborefrigerator involved in the present invention.
Fig. 2 is the rated current ratio for representing motor（%）With the curve map of the relation of the temperature of motor interior.
Fig. 3 is that the liquid refrigerant for representing glut to motor returns to energy-saving appliance effect drop in the case of evaporator
The Mollier line chart of lower part.
Description of reference numerals：1 ... turbo-compressor；2 ... condensers；3 ... evaporators；4 ... energy-saving appliances；5 ... refrigerants are matched somebody with somebody
Pipe；5BP ... refrigerant supplying tubings；6 ... electric-type control valves；8 ... streams；10 ... control devices；11 ... motor；11c…
Shell；12 ... control valves；T ... temperature sensors.
Embodiment
Hereinafter, 1~Fig. 2 of reference picture illustrates to the embodiment of turborefrigerator involved in the present invention.Fig. 1~
In Fig. 2, identical reference is marked to same or equivalent inscape and the repetitive description thereof will be omitted.
Fig. 1 is the schematic diagram for the first embodiment for representing turborefrigerator involved in the present invention.As shown in figure 1, whirlpool
Wheel refrigeration machine possesses：The turbo-compressor 1 of compression refrigerant, use cooling water（Cooling fluid）The refrigerant gas compressed is entered
Row cools down and made its condenser 2 condensed, from cold water（Cooled fluid）Capture heat and make refrigerant evaporation to play refrigeration effect
Intercooler that is, energy-saving appliance 4 of the evaporator 3 and configuration of fruit between condenser 2 and evaporator 3, respectively set above-mentioned
The standby refrigerant piping 5 by for refrigerant circulation links to form.
In the embodiment shown in Fig. 1, turbo-compressor 1 is made up of multistage turbocompressor, and is driven by motor 11
It is dynamic.Turbo-compressor 1 is the semi-hermetic type whirlpool for the shell that motor 11 is accommodated in the type of separating together with compressor with air-tight state
Wheel compression machine.Turbo-compressor 1 is connected by stream 8 with energy-saving appliance 4, so as to by by the separated refrigerant gas of energy-saving appliance 4
Body imported into the multi-stage compression level of turbo-compressor 1（It is two-stage in this embodiment）Center section（In this embodiment for the first order with
Part between the second level）.
In the kind of refrigeration cycle of the turborefrigerator formed as shown in Figure 1, refrigerant turbo-compressor 1, condenser 2,
Circulated in evaporator 3 and energy-saving appliance 4, manufacture cold water and corresponding with load using the Cooling and Heat Source obtained by evaporator 3, taken
Enter the heat for carrying out flash-pot 3 into kind of refrigeration cycle and the work(equivalent to the turbo-compressor 1 supplied from motor 11
Heat, supply is released to the cooling water of condenser 2.On the other hand, the refrigerant gas separated by energy-saving appliance 4 is directed to
The center section of the multi-stage compression level of turbo-compressor 1, with the refrigerant gas interflow from first order compressor and by second
Level compressor compresses.The refrigeration part realized by energy-saving appliance 4 is attached with by two stages of compression single-stage economizer cycle, because
This can increase the refrigeration of the part, compared with being not provided with the situation of energy-saving appliance 4, can realize the high efficiency of refrigeration
Change.
As shown in figure 1, it is provided with and will freezes in a manner of from refrigerant piping 5 branch of the connection condenser 2 with energy-saving appliance 4
Agent imported into the refrigerant supplying tubing 5BP of motor 11 from condenser side.Refrigerant supplying tubing 5BP is outer with motor 11
Shell 11c connections, so as to be imported into by 2 condensed refrigerant of condenser in the shell 11c of motor 11.Moreover, freezing
Agent supplying tubing 5BP is provided with electric-type control valve 12, by being controlled to the aperture of control valve 12, thus, it is possible to control system
The flow of cryogen.Control valve 12 is connected with control device 10.The refrigerant importeding into the shell 11c of motor 11, in shell
Evaporated during being flowed in 11c, so as to capture the heat of motor 11 using evaporation latent heat now so as to motor 11
Cooled down.Refrigerant gas after cooling motor 11 is back to evaporator 3.The installation site of electric-type control valve 12 is being made
In cryogen supplying tubing 5BP as close possible to motor side preferably.Because control valve 12 turns into throttle mechanism, therefore liquid
State refrigerant overflows in compressor two level side and turns into the two-phase flow of refrigerant, it is possible to hindering the flowing of refrigerant.
As shown in figure 1, the temperature sensor T of the temperature of measurement motor interior is provided with motor 11.Temperature passes
Sensor T can for example be entered using thermocouple, the test side of temperature sensor to the temperature in the part of the motor interior highest temperature
Row measurement.Temperature sensor T is connected with control device 10.
Next, the effect of the turborefrigerator to forming as shown in Figure 1 illustrates.
In turborefrigerator operation process, by the temperature inside temperature sensor T measurement motor 11.Temperature sensor
T measurement signal is sent to control device 10 successively.Control device 10 is based on temperature sensor T measurement signal come to electronic
The aperture of formula control valve 12 carries out ratio control, so that motor interior turns into set point of temperature.Wherein, it is specified that temperature refers to basis
The specification of motor（Limitary temperature is set in the class of insulation）And the temperature determined.So, by controlling electrodynamic type
The aperture of valve 12 carries out ratio control, thus, it is possible to by order to the operating condition by refrigeration machine（Load）The motor hair of decision
Hot part efficiently carries out cooling down required minimal condensating refrigerant（Liquid refrigerant）Refrigerant amount supply to electricity
Motivation 11.Therefore, it is possible to suitably be cooled down to motor 11 without excessive or deficiency, so as to prevent refrigeration machine
Efficiency reduces.
Temperature sensor T needs the temperature of the part to the motor interior highest temperature to measure, and is preferably provided at
Measurement temperature and the rated current of motor than the higher position of the degree of correlation.Therefore, the present inventor sets multiple thermocouples
In stator core, the position of stator coil end, come investigate the rated current of measurement temperature and motor than the degree of correlation.
Fig. 2 is the rated current ratio for representing motor（%）With the curve map of the relation of the temperature of motor interior.In Fig. 2
Middle motor temperature is to supply refrigerant from condenser side and make the temperature after motor cooling.In fig. 2, hollow square represents
The stator coil end temperature gone out by thermocouple measurement and rated current than relation, the square of blacking represents to pass through thermoelectricity
The stator core temperature occasionally measured and rated current than relation.
As shown in Fig. 2 stator core temperature and rated current are than in linear relationship and showing higher related but fixed
Subcoil end region temperature is more poor than related to rated current, and deviation be present.Therefore being preferably arranged on temperature sensor T can
The position of stator core temperature is measured, the representative temperature of motor turns into the temperature near stator core temperature or stator core.
In the present invention, obtain in advance by the temperature near the temperature sensor T stator core temperature measured or stator core
Degree, the relation with the aperture of electric-type control valve 12, and tabular is allowed in advance, thus, it is possible to be surveyed according to by temperature sensor T
The measurement temperature of amount and determine the aperture of electric-type control valve 12 immediately.
According to the present invention, temperature near stator core temperature or stator core is measured by temperature sensor T, and be based on
Measurement temperature controls the aperture of electric-type control valve 12, thus, it is possible to being matched by the caloric value with motor 11 in a manner of make to
Motor 11 supply condensating refrigerant refrigerant amount optimize, and then motor 11 can suitably be cooled down without
Can excessive or deficiency.Terminate the gas refrigerant of the cooling to motor 11, via loopback pipe arrangement（It is not shown）And it is back to steaming
Send out device 3.
In the embodiment shown in Fig. 1 and Fig. 2, though the turborefrigerator for having used economizer cycle is said
It is bright, but for being not provided with the turborefrigerator of type of energy-saving appliance, as long as with from the system of connection condenser 2 and evaporator 3
The mode of cryogen pipe arrangement branch sets the refrigerant supplying tubing 5BP that refrigerant is imported into motor 11 from condenser side, and
In refrigerant supply pipe 5BP, electric-type control valve 12 is set.Make from there through the aperture of control electric-type control valve 12
Supplied from condenser side to the flow optimization of the refrigerant of motor 11, so as to suitably be cooled down to motor 11
Without excessive or deficiency.
So far, embodiments of the present invention are illustrated, but the present invention is not limited to above-mentioned embodiment, in its skill
In the range of art thought, naturally it is also possible to implemented by a variety of modes.
Claims (4)
1. a kind of turborefrigerator, possesses：From cold water capture heat and make refrigerant evaporation come play the evaporator of refrigeration,
Using impeller come the turbo-compressor of compression refrigerant, the motor of driving turbo-compressor and with cooling water to being compressed
Refrigerant gas cooled down and made the condenser that it is condensed, the turborefrigerator is characterised by possessing：
The refrigerant supplying tubing of refrigerant is supplied from the pipe arrangement of condenser side branch that is, from condenser side to the motor；
The refrigerant supplying tubing is arranged at, the refrigerant flow flowed in the refrigerant supplying tubing is controlled
Control valve；
Measure the motor to rated current than in linear relationship and showing higher related stator core temperature
Temperature measurement unit；And
The control device of the aperture of the control valve is controlled,
Relation of the control device based on the stator core temperature obtained in advance with the aperture of the control valve, according to by
The stator core temperature of the motor that the temperature measurement unit is measured determines the aperture of the control valve, and
The aperture that control valve control has been determined for this, is thus controlled to the refrigerant flow supplied to the motor
System.
2. turborefrigerator according to claim 1, it is characterised in that
The turbo-compressor is made up of multistage turbocompressor, and the turborefrigerator possesses to the more of multistage turbocompressor
The energy-saving appliance of the center section supply refrigerant gas of level compression stage.
3. turborefrigerator according to claim 1, it is characterised in that
The control valve is disposed proximate to the position of the motor.
4. according to turborefrigerator according to any one of claims 1 to 3, it is characterised in that
The temperature measurement unit is thermocouple.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013036876A JP2014163624A (en) | 2013-02-27 | 2013-02-27 | Turbo refrigerator |
| JP2013-036876 | 2013-02-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104006563A CN104006563A (en) | 2014-08-27 |
| CN104006563B true CN104006563B (en) | 2017-11-14 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410055037.4A Active CN104006563B (en) | 2013-02-27 | 2014-02-18 | Turborefrigerator |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2014163624A (en) |
| CN (1) | CN104006563B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102268282B1 (en) * | 2015-01-13 | 2021-06-22 | 엘지전자 주식회사 | Turbo compressor and Refrigerating device having the same |
| US20190092130A1 (en) * | 2016-03-22 | 2019-03-28 | Denso Corporation | Refrigeration cycle device |
| JP6630627B2 (en) * | 2016-05-02 | 2020-01-15 | 荏原冷熱システム株式会社 | Turbo refrigerator |
| US10782057B2 (en) | 2017-12-29 | 2020-09-22 | Johnson Controls Technology Company | Motor temperature control technique with temperature override |
| CN113785165B (en) * | 2019-03-28 | 2023-05-05 | 江森自控泰科知识产权控股有限责任合伙公司 | Heating, ventilation, air conditioning, and/or refrigeration system with compressor motor cooling system |
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Also Published As
| Publication number | Publication date |
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| JP2014163624A (en) | 2014-09-08 |
| CN104006563A (en) | 2014-08-27 |
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