CN103727695A - Turbo chiller - Google Patents
Turbo chiller Download PDFInfo
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- CN103727695A CN103727695A CN201310485007.2A CN201310485007A CN103727695A CN 103727695 A CN103727695 A CN 103727695A CN 201310485007 A CN201310485007 A CN 201310485007A CN 103727695 A CN103727695 A CN 103727695A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
- F25B1/053—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of turbine type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/315—Expansion valves actuated by floats
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
- F25B2341/06—Details of flow restrictors or expansion valves
- F25B2341/068—Expansion valves combined with a sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/05—Refrigerant levels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention refers to a turbo chiller, concretely a turbo chiller which can easily detect and adjust the refrigerant liquid level of a condenser. The turbo chiller comprises a compressor comprising impellers used for compressing a refrigerant; a condenser used for performing heat exchange on the refrigerant flowing from the compressor and cooling water; an evaporator used for performing heat exchange on the refrigerant discharged from the condenser and the cool water; an expansion valve arranged between the condenser and the evaporator; more than two sensors arranged at different heights in increasing direction of the refrigerant liquid level and used for detecting the refrigerant liquid level in the condenser; and a controlling part used for adjusting the aperture of the expansion valve in dependence on the refrigerant liquid level detected by the sensors.
Description
Technical field
The present invention relates to turbo refrigerating machine, be specifically related to easily to detect and to regulate the turbo refrigerating machine of the refrigerant level of condenser.
Background technology
Conventionally, turbo refrigerating machine, as utilizing cold-producing medium to carry out the equipment of the heat exchange of cold water and cooling water, comprises compressor, evaporimeter, condenser and expansion valve.
Above-mentioned compressor can comprise impeller (Impeller), cover (Shroud), variable diffuser (Diffuser), wherein, impeller is by the driving force of drive motors and rotate, cover is used for accommodating impeller, and variable diffuser is for converting the kinetic energy of the fluid of discharging along with vane rotary to pressure energy.
As an embodiment of above-mentioned evaporimeter and condenser, can there is shell structure of (Shell in tube) in pipe, cold water and cooling water are respectively in the internal flow of pipe, and cold-producing medium can be accommodated in the inside of shell.
And, to above-mentioned evaporimeter, flow into cold water or discharge cold water from above-mentioned evaporimeter, in the inside of above-mentioned evaporimeter, above-mentioned cold-producing medium and cold water carry out heat exchange, and above-mentioned cold water is cooled in the process by above-mentioned evaporimeter.
And, to above-mentioned condenser, flow into cold water or discharge cooling water from above-mentioned condenser, in the inside of above-mentioned condenser, above-mentioned cold-producing medium and cooling water carry out heat exchange, and above-mentioned cooling water is heated in the process by above-mentioned condenser.
And the cold-producing medium of accommodating in the inside of above-mentioned evaporimeter and condenser can keep the desired refrigerant level of being scheduled to, and refrigerant level can regulate by expansion valve.
On the other hand, while starting at the turbo refrigerating machine initial stage, during load change or design temperature when change, the refrigerant level of above-mentioned condenser can change, the refrigerant level of condenser can not keep, in the situation of predetermined bits, the problem of the reliability decrease of turbo refrigerating machine occurring.
Therefore, need a kind of structure that can accurately detect condenser refrigerant level and easily regulate condenser refrigerant level according to testing result.
Summary of the invention
Technical problem of the present invention is to provide turbo refrigerating machine, can easily detect the refrigerant level of condenser, and easily regulates condenser refrigerant level according to testing result.
And technical problem of the present invention is to provide turbo refrigerating machine, can reduces manufacturing expense, and improve control response.
In order to address the above problem, according to a scheme of the present invention, provide turbo refrigerating machine, comprising: compressor, comprises the impeller for compressed refrigerant; Condenser, for making the cold-producing medium and the cooling water that flow into from above-mentioned compressor carry out heat exchange; Evaporimeter, for making cold-producing medium and the cold water (chilled water) of discharging from above-mentioned condenser carry out heat exchange; Expansion valve, is located between above-mentioned condenser and evaporimeter; Plural sensor, is arranged at mutually different height along the increase direction of refrigerant level, for detection of the refrigerant level of the inside of above-mentioned condenser; And control part, the refrigerant level detecting according to the sensor, regulates the aperture of above-mentioned expansion valve.
And the sensor can comprise first sensor to the three sensors that set gradually along the increase direction of refrigerant level, the interval that desired refrigerant level can be between above-mentioned first sensor and the second sensor.
And, also can comprise the cylinder being connected with above-mentioned condenser, the direction that above-mentioned first sensor to the three sensors can increase along refrigerant level is set in turn in the inside of above-mentioned cylinder.
And above-mentioned control part, if above-mentioned first sensor and the second sensor detect respectively cold-producing medium, can open above-mentioned expansion valve, if only have above-mentioned first sensor cold-producing medium to be detected, can keep the aperture of expansion valve.
And if above-mentioned the 3rd sensor detects cold-producing medium, above-mentioned control part can be opened above-mentioned expansion valve, and by the regulation of above-mentioned expansion valve for to compare discharging refrigerant quickly with the situation of only having first sensor and the second sensor cold-producing medium to be detected.
And in the situation that first sensor does not detect cold-producing medium, above-mentioned control part can be closed above-mentioned expansion valve.
And, above-mentioned cylinder can with being connected for accommodating the region of liquid phase refrigerant of above-mentioned condenser, above-mentioned liquid phase refrigerant can keep identical height in the inside of above-mentioned cylinder and the inside of above-mentioned condenser.
And above-mentioned first sensor to the three sensors can be static capacity sensors.
And, according to a scheme more of the present invention, provide turbo refrigerating machine, comprising: compound compressor, has a plurality of levels; Condenser, for making the cold-producing medium and the cooling water (condenser water) that flow into from above-mentioned compressor carry out heat exchange; Phase separator, for the separated liquid phase refrigerant of cold-producing medium and the vapor phase refrigerant of discharging from above-mentioned condenser, and makes vapor phase refrigerant discharge to above-mentioned compressor; Evaporimeter, for making liquid phase refrigerant and the cold water of discharging from above-mentioned phase separator carry out heat exchange; The first expansion valve, is located between above-mentioned condenser and above-mentioned phase separator; The second expansion valve, is located between above-mentioned phase separator and above-mentioned evaporimeter; Plural condenser refrigerant level detecting sensor, is arranged at mutually different height along the increase direction of refrigerant level, for detection of the refrigerant level of the inside of above-mentioned condenser; Plural phase separator refrigerant level detecting sensor, is arranged at mutually different height along the increase direction of refrigerant level, for detection of the refrigerant level of the inside of above-mentioned phase separator; And control part, the refrigerant level detecting according to above-mentioned condenser refrigerant level detecting sensor and above-mentioned phase separator refrigerant level detecting sensor, regulates respectively the aperture of above-mentioned the first expansion valve and the second expansion valve.
And, above-mentioned condenser refrigerant level detecting sensor can comprise the first condenser refrigerant level detecting sensor to the three condenser refrigerant level detecting sensors that set gradually along the increase direction of refrigerant level, the region that desired refrigerant level can be between above-mentioned the first condenser refrigerant level detecting sensor and the second condenser refrigerant level detecting sensor.
And, above-mentioned turbo refrigerating machine also can comprise the cylinder being connected with above-mentioned condenser, and the direction that above-mentioned the first condenser refrigerant level detecting sensor to the three condenser refrigerant level detecting sensors can increase along refrigerant level is set in turn in the inside of above-mentioned cylinder.
And above-mentioned the first condenser refrigerant level detecting sensor to the three condenser refrigerant level detecting sensors can be static capacity sensors.
And, above-mentioned control part, if above-mentioned the first condenser refrigerant level detecting sensor and the second condenser refrigerant level detecting sensor detect respectively cold-producing medium, can open above-mentioned the first expansion valve, if only have above-mentioned the first condenser refrigerant level detecting sensor cold-producing medium to be detected, can keep the aperture of the first expansion valve.
And, if above-mentioned the 3rd condenser refrigerant level detecting sensor detects cold-producing medium, above-mentioned control part can be opened above-mentioned the first expansion valve, and by the regulation of above-mentioned the first expansion valve for to compare discharging refrigerant quickly with the situation of only having the first condenser refrigerant level detecting sensor and the second condenser refrigerant level detecting sensor cold-producing medium to be detected.
And, above-mentioned turbo refrigerating machine also can comprise plural phase separator refrigerant level detecting sensor, described plural phase separator refrigerant level detecting sensor is arranged at mutually different height along the increase direction of liquid phase refrigerant liquid level, liquid phase refrigerant liquid level for detection of the inside of above-mentioned phase separator, the liquid phase refrigerant liquid level that above-mentioned control part detects according to phase separator refrigerant level detecting sensor, regulates the aperture of above-mentioned the second expansion valve.
And, above-mentioned phase separator refrigerant level detecting sensor can comprise that the first-phase separator refrigerant level detecting sensor setting gradually along the increase direction of refrigerant level is to third phase separator refrigerant level detecting sensor, the interval of desired refrigerant level between above-mentioned first-phase separator refrigerant level detecting sensor and second-phase separator refrigerant level detecting sensor.
And, above-mentioned control part, if above-mentioned first-phase separator refrigerant level detecting sensor and second-phase separator refrigerant level detecting sensor detect respectively cold-producing medium, can open above-mentioned the second expansion valve, if only have above-mentioned first-phase separator refrigerant level detecting sensor cold-producing medium to be detected, can keep the aperture of the second expansion valve.
And, if above-mentioned third phase separator refrigerant level detecting sensor detects cold-producing medium, above-mentioned control part can be opened above-mentioned the second expansion valve, and by the regulation of above-mentioned the second expansion valve for to compare discharging refrigerant quickly with the situation of only having first-phase separator refrigerant level detecting sensor and second-phase separator refrigerant level detecting sensor cold-producing medium to be detected.
And above-mentioned first-phase separator refrigerant level detecting sensor to third phase separator refrigerant level detecting sensor can be static capacity sensor.
And, according to another aspect of the present invention, providing turbo refrigerating machine, compound compressor, has a plurality of levels; Condenser, for making the cold-producing medium and the cooling water that flow into from above-mentioned compressor carry out heat exchange; Phase separator, for the separated liquid phase refrigerant of cold-producing medium and the vapor phase refrigerant of discharging from above-mentioned condenser, and makes vapor phase refrigerant discharge to above-mentioned compressor; Evaporimeter, for making liquid phase refrigerant and the cold water of discharging from above-mentioned phase separator carry out heat exchange; The first expansion valve, is located between above-mentioned condenser and above-mentioned phase separator; The second expansion valve, is located between above-mentioned phase separator and above-mentioned evaporimeter; Plural condenser refrigerant level detecting sensor, is arranged at mutually different height along the increase direction of refrigerant level, for detection of the refrigerant level of the inside of above-mentioned condenser; Plural phase separator refrigerant level detecting sensor, is arranged at mutually different height along the increase direction of refrigerant level, for detection of the refrigerant level of the inside of above-mentioned phase separator; And control part, the refrigerant level detecting according to above-mentioned condenser refrigerant level detecting sensor and above-mentioned phase separator refrigerant level detecting sensor, regulates respectively the aperture of above-mentioned the first expansion valve and the second expansion valve.
As mentioned above, according to the turbo refrigerating machine being associated with one embodiment of the invention, can accurately detect condenser refrigerant level, and easily regulate condenser refrigerant level according to testing result.
And, according to the turbo refrigerating machine being associated with one embodiment of the invention, when can reduce manufacturing expense, improve control response.
Accompanying drawing explanation
Fig. 1 and Fig. 2 mean the block diagram of the turbo refrigerating machine being associated with the first embodiment of the present invention.
Fig. 3 and Fig. 4 are for the concept map of the duty of the turbo refrigerating machine being associated with the first embodiment of the present invention is described.
Fig. 5 is for the flow chart of the control method of the turbo refrigerating machine being associated with the first embodiment of the present invention is described.
Fig. 6 and Fig. 7 mean the block diagram of the turbo refrigerating machine being associated with the second embodiment of the present invention.
Fig. 8 A, Fig. 8 B are for the concept map of the duty of the turbo refrigerating machine being associated with the second embodiment of the present invention is described.
The specific embodiment
Below, with reference to accompanying drawing, describe the turbo refrigerating machine of one embodiment of the invention in detail.Accompanying drawing is used for illustrating way of example of the present invention, just in order to illustrate in greater detail the present invention, provides, and the claimed technical scope of the present invention is not limited to this.
And no matter reference numeral, identical or corresponding structural element marks identical Reference numeral, and omit the repeat specification to this, for convenience of description, the size of illustrated each structure member and shape may zoom in or out.
On the other hand, comprise that the term of the ordinal number such as first or second can be for various structural elements are described, but said structure key element do not limit by above-mentioned term, above-mentioned term is only for distinguishing the object between structural element.
Below, with reference to accompanying drawing, illustrate each structural element that forms the turbo refrigerating machine 1 being associated with the first embodiment.
Fig. 1 and Fig. 2 mean the block diagram of the turbo refrigerating machine 1 being associated with the first embodiment of the present invention.Fig. 3 and Fig. 4 are for the concept map of the duty of the turbo refrigerating machine 1 being associated with the first embodiment of the present invention is described.Fig. 5 is for the flow chart of the control method of the turbo refrigerating machine 1 being associated with the first embodiment of the present invention is described.
With reference to Fig. 1, above-mentioned turbo refrigerating machine 1 comprises compressor 10 for compressed refrigerant, for making the condenser 30 of condensation of refrigerant, for making expansion valve 40 that cold-producing medium expands and for making the evaporimeter 20 of cold-producing medium evaporation.
Above-mentioned compressor 10 can comprise impeller 11(Impeller), cover, variable diffuser (Diffuser), wherein, impeller 11(Impeller) by the driving force of drive motors and rotate, cover is used for accommodating impeller, and variable diffuser (Diffuser) is for converting the kinetic energy of the fluid of discharging along with the rotation of impeller to pressure energy.
As an embodiment of above-mentioned evaporimeter 20 and condenser 30, can there is shell structure of (Shell in tube) in pipe.Cold water is in the inside of the pipe of above-mentioned evaporimeter 20 inside, and cold-producing medium can be accommodated in the inside of shell.Equally, cooling water is in the internal flow of the pipe of above-mentioned condenser 30 inside, and cold-producing medium can be accommodated in the inside of shell.
And, to above-mentioned evaporimeter 20, flow into cold water (chilled water) or discharge cold water from above-mentioned evaporimeter 20.At this moment, in above-mentioned evaporimeter 20 inside, above-mentioned cold-producing medium and cold water carry out heat exchange, and above-mentioned cold water is cooled in the process by above-mentioned evaporimeter.
And, to above-mentioned condenser 30, flow into cooling water (condenser water) or discharge cooling water from above-mentioned condenser 30, in the inside of above-mentioned condenser 30, above-mentioned cold-producing medium and cooling water carry out heat exchange, and above-mentioned cooling water is heated in the process by above-mentioned condenser.
And the cold-producing medium of accommodating in the inside of above-mentioned evaporimeter 20 and condenser 30 can keep respectively the desired refrigerant level of being scheduled to, and refrigerant level can regulate by expansion valve.Because of the freeze cycle structure of turbo refrigerating machine 1, by above-mentioned expansion valve 40, regulate the refrigerant level of above-mentioned condenser 30, compare and regulate the refrigerant level of evaporimeter 20 more favourable.
As mentioned above, above-mentioned condenser 30 has the structure of shell in pipe, and cold-producing medium should be in the inner predetermined bits (level) that keeps of above-mentioned shell.In the situation that the refrigerant amount flowing into above-mentioned condenser 30 increases, the refrigerant level of above-mentioned condenser 30 inside can uprise, and on the contrary, in the situation that the refrigerant amount flowing into above-mentioned condenser 30 reduces, the refrigerant level of above-mentioned condenser 30 inside can step-down.
And the refrigerant level of the cold-producing medium of above-mentioned condenser 30 inside can not keep in the situation of predetermined bits, the temperature of cooling water can not keep design temperature, and reduces the reliability of turbo refrigerating machine 1.
Particularly, in 1 when starting at initial stage of turbo refrigerating machine, during load change or during design temperature change, the refrigerant level of above-mentioned condenser 30 can change, the refrigerant level of condenser can not keep, in the situation of predetermined bits, the problem of the reliability decrease of turbo refrigerating machine 1 occurring.
With reference to Fig. 1 and Fig. 2, be associated with the first embodiment of the present invention turbo refrigerating machine 1, comprising: compressor 10, comprises the impeller 11 for compressed refrigerant; Condenser 30, for making the cold-producing medium and the cooling water that flow into from above-mentioned compressor 10 carry out heat exchange; Evaporimeter 20, for making cold-producing medium and the cold water of discharging from above-mentioned condenser 30 carry out heat exchange; Expansion valve 40, is located between above-mentioned condenser 30 and evaporimeter 20; Plural sensor 61 to 63, is arranged at mutually different height along the increase direction of refrigerant level, for detection of the refrigerant level of the inside of above-mentioned condenser 30; And control part 70, the refrigerant level detecting according to the sensor 61 to 63, regulates the aperture of above-mentioned expansion valve 40.
In the situation that the refrigerant amount flowing into above-mentioned condenser 30 increases, the refrigerant level of above-mentioned condenser 30 inside can uprise, and on the contrary, in the situation that the refrigerant amount flowing into above-mentioned condenser 30 reduces, the refrigerant level of above-mentioned condenser 30 inside can step-down.And in the inside of above-mentioned condenser 30, liquid phase refrigerant R and vapor phase refrigerant can exist simultaneously.At this, the liquid phase refrigerant liquid level of the sensor 61 to 63 detection condenser 30 inside, the sensor 61 to 63 is arranged at mutually different height along the increase direction of refrigerant level, for detection of the refrigerant level of above-mentioned condenser 30 inside.
Plural the sensor sets gradually along the increase direction of refrigerant level.For example, the sensor can comprise first sensor 61 and the second sensor 62, and the sensor can comprise first sensor 61 and the second sensor 62 and the 3rd sensor 63.
And the sensor 61 to 63 can be static capacity sensor.The sensor 61 to 63 is in the situation of static capacity sensor, can only cold-producing medium be detected in the place that respective sensor is set.That is,, in the situation that refrigerant level is positioned at the sensor height of living in, this refrigerant level can be detected.
For example, first sensor 61 is positioned at minimum position, and the second sensor 62 is positioned at the position higher than first sensor 61, and the 3rd sensor 63 is positioned at than the second high position of sensor 62.
And the situation that above-mentioned first sensor 61 detects cold-producing medium refers to, the refrigerant level of above-mentioned condenser 30 inside is higher than first sensor 61 height of living in.And the situation that first sensor 61 and the second sensor 62 detect respectively cold-producing medium refers to, the cold-producing medium of above-mentioned condenser 30 inside is higher than the second sensor 62 height of living in.And the situation that the 3rd sensor 63 detects cold-producing medium refers to, the refrigerant level of above-mentioned condenser 30 inside is higher than the 3rd sensor 63 height of living in.
And the situation of only having first sensor 61 cold-producing medium to be detected refers to, the interval of the refrigerant level of above-mentioned condenser 30 inside between first sensor 61 and the second sensor 62.The situation that sensor 61 does not detect cold-producing medium refers to, the refrigerant level of above-mentioned condenser 30 inside is lower than first sensor 61 height of living in.
Above-mentioned control part 70, the refrigerant level detecting according to the sensor 61 to 63, regulates the aperture of above-mentioned expansion valve 40, thereby regulates the refrigerant level of above-mentioned condenser 30 inside.That is, the refrigerant level that above-mentioned control part 70 detects according to the sensor 61 to 63, closes above-mentioned expansion valve 40, or open above-mentioned expansion valve 40, or regulates the aperture of above-mentioned expansion valve 40.
According to the open state of above-mentioned expansion valve 40 and aperture, the refrigerant level of above-mentioned condenser 30 inside can increase or reduce.For example, close in the situation of above-mentioned expansion valve 40, the refrigerant level of above-mentioned condenser 30 inside can increase, and in the situation of open above-mentioned expansion valve 40, the refrigerant level of above-mentioned condenser 30 inside can reduce.
That is, reduce in the situation of aperture of above-mentioned expansion valve 40, the refrigerant level of above-mentioned condenser 30 inside can increase.And, increasing in the situation of aperture of above-mentioned expansion valve 40, the refrigerant level of above-mentioned condenser 30 inside can reduce.
Particularly, while starting at 1 initial stage of turbo refrigerating machine, during load change or when design temperature changes, the refrigerant level variable of above-mentioned condenser.Above-mentioned control part 70 detects the variation of the refrigerant level of above-mentioned condenser 30, the refrigerant level of condenser is reached to desired refrigerant level, to maintain regulation level.
With reference to Fig. 3, can set gradually plural the sensor along the increase direction of refrigerant level, for example, the sensor consists of first sensor 61 and the second sensor 62.And the sensor 61 and 62 can be positioned at the inside of above-mentioned condenser 30, also can be positioned at the outside of above-mentioned condenser 30.
In the situation that the outer setting the sensor 61 and 62 of above-mentioned condenser 30, above-mentioned turbo refrigerating machine 1 also can comprise the cylinder 80 being connected with above-mentioned condenser 30, and above-mentioned first sensor 61 and the second sensor 62 can be along the increase directions of refrigerant level and be set in turn in the inside of above-mentioned cylinder 80.
And above-mentioned cylinder 80 is connected for accommodating the region (normally lower area) of liquid phase refrigerant R with above-mentioned condenser 30, above-mentioned liquid phase refrigerant R can keep identical height in the inside of above-mentioned cylinder 80 and the inside of above-mentioned condenser 30.The situation of sensor 61 and 62 is set in above-mentioned cylinder 80 inside, compares the situation that sensor is set in condenser 30 inside, can improve reliability.
For example, even in the situation that the refrigerant level of condenser 30 inside sharply changes, because the pipe arrangement connecting between above-mentioned condenser 30 and cylinder 80 plays cushioning effect, therefore, compare the situation that sensor 61 and 62 are set in above-mentioned cylinder 80 inside, can control more accurately.
And the situation that above-mentioned first sensor 61 detects cold-producing medium refers to, the refrigerant level of above-mentioned condenser 30 inside is higher than first sensor 61 height of living in.And the situation that first sensor 61 and the second sensor 62 detect respectively cold-producing medium refers to, the cold-producing medium of above-mentioned condenser 30 inside is higher than the second sensor 62 height of living in.
And, the situation of only having first sensor 61 cold-producing medium to be detected refers to, the interval of the refrigerant level of above-mentioned condenser 30 inside between first sensor 61 and the second sensor 62, the situation that sensor 61 does not detect cold-producing medium refers to, the refrigerant level of above-mentioned condenser 30 inside is lower than first sensor 61 height of living in.
On the other hand, desired refrigerant level V can arrange in the interval between first sensor 61 and the second sensor 62.That is, the second sensor 62 does not detect cold-producing medium and only has first sensor 61 to detect in the situation of cold-producing medium, and the refrigerant level that above-mentioned control part 70 can be judged as the inside of condenser is keeping desired refrigerant level V.Above-mentioned desired refrigerant level V, can diversely determine according to the desired load of turbo refrigerating machine 1 certainly.
At this, if first sensor 61 and the second sensor 62 detect respectively cold-producing medium, the current refrigerant liquid level that above-mentioned control part 70 is judged as condenser 30 inside is higher than desired refrigerant level V.At this moment, above-mentioned control part 70, in order to reduce the refrigerant level of condenser 30 inside, can be opened above-mentioned expansion valve 40.Therefore, the cold-producing medium of above-mentioned condenser 30 inside is discharged to evaporimeter 20 by above-mentioned expansion valve 40, and the refrigerant level of above-mentioned condenser 30 inside reduces thus, and the refrigerant level of above-mentioned condenser 30 inside keeps desired refrigerant level V.
On the other hand, open above-mentioned expansion valve 40, not only instigates expansion valve 40 lower open in off position, is also included in the meaning that increases the aperture of above-mentioned expansion valve under the state that above-mentioned expansion valve 40 keeps predetermined aperture.
And if only have above-mentioned first sensor 61 cold-producing medium to be detected, above-mentioned control part 70 can make expansion valve 40 keep current aperture.; above-mentioned the second sensor 62 does not detect cold-producing medium and only has above-mentioned first sensor 61 to detect in the situation of cold-producing medium; the refrigerant level that above-mentioned control part 70 can be judged as the inside of condenser is keeping desired refrigerant level V, keeps thus the aperture of expansion valve 40.
Unlike this, above-mentioned first sensor 61 does not detect in the situation of cold-producing medium, and 70 of above-mentioned control parts can be closed above-mentioned expansion valve 40, and therefore, the refrigerant level of above-mentioned condenser 30 inside uprises, and keeps desired refrigerant level V.
On the other hand, the spacing (difference in height) between the 3rd sensor 63 and the second sensor 62 can be less than the spacing (difference in height) between first sensor 61 and the second sensor 62.And spacing between two adjacent sensors, can determine according to desired refrigerant level V.
With reference to Fig. 4, can set gradually more than three the sensors along the increase direction of refrigerant level, for example, above-mentioned the sensor can consist of first sensor 61 and the second sensor 62 and the 3rd sensor 63.As mentioned above, the sensor 61 to 63 can be positioned at the inside of above-mentioned condenser 30, also can be positioned at the outside of above-mentioned condenser 30.
In the situation that the outer setting the sensor 61 to 63 of above-mentioned condenser 30, above-mentioned turbo refrigerating machine 1 does not comprise the cylinder 80 being connected with above-mentioned condenser 30, and above-mentioned first sensor 61 to the 3rd sensor 63 can be set in turn in along the increase direction of refrigerant level the inside of above-mentioned cylinder 80.
And above-mentioned cylinder 80 is connected for accommodating the region (common lower area) of liquid phase refrigerant R with above-mentioned condenser 30, above-mentioned liquid phase refrigerant R can keep identical height in the inside of above-mentioned cylinder 80 and the inside of above-mentioned condenser 30.The situation of sensor 61 to 63 is set in above-mentioned cylinder 80 inside, compares the situation that sensor is set in condenser 30 inside, can improve reliability.
For example, even change in the situation that the refrigerant level of condenser 30 inside is unexpected, because the pipe arrangement connecting between above-mentioned condenser 30 and cylinder 80 plays cushioning effect, therefore, compare the situation that sensor 61 to 63 is set in above-mentioned cylinder 80 inside, can control more accurately.
And the situation that above-mentioned first sensor 61 detects cold-producing medium refers to, the refrigerant level of above-mentioned condenser 30 inside is higher than first sensor 61 height of living in.And the situation that first sensor 61 and the second sensor 62 detect respectively cold-producing medium refers to, the cold-producing medium of above-mentioned condenser 30 inside is higher than the second sensor 62 height of living in.
And the situation of only having first sensor 61 cold-producing medium to be detected refers to, the interval of the refrigerant level of above-mentioned condenser 30 inside between first sensor 61 and the second sensor 62.Equally, the situation that sensor 61 does not detect cold-producing medium refers to, the refrigerant level of above-mentioned condenser 30 inside is lower than first sensor 61 height of living in.
On the other hand, the interval that desired refrigerant level V can be between first sensor 61 and the second sensor 62.That is, the second sensor 62 does not detect cold-producing medium and only has first sensor 61 to detect in the situation of cold-producing medium, and the refrigerant level that above-mentioned control part 70 can be judged as the inside of condenser is keeping desired refrigerant level V.
With reference to Fig. 5, if first sensor 61 and the second sensor 62 detect respectively cold-producing medium, the current refrigerant liquid level that above-mentioned control part 70 is judged as condenser 30 inside is higher than desired refrigerant level V, and open above-mentioned expansion valve 40.Therefore, the cold-producing medium of above-mentioned condenser 30 inside is discharged to evaporimeter 20 by above-mentioned expansion valve 40, and the refrigerant level of above-mentioned condenser 30 inside reduces thus, and the refrigerant level of above-mentioned condenser 30 inside keeps desired refrigerant level V.
On the other hand, open above-mentioned expansion valve 40, not only instigates expansion valve 40 lower open in off position, is also included in the meaning that increases the aperture of above-mentioned expansion valve under the state that above-mentioned expansion valve 40 keeps predetermined aperture.
And if only have above-mentioned first sensor 61 cold-producing medium to be detected, above-mentioned control part 70 can make expansion valve 40 keep current aperture.; above-mentioned the second sensor 62 does not detect cold-producing medium and only has above-mentioned first sensor 61 to detect in the situation of cold-producing medium; the refrigerant level that above-mentioned control part 70 can be judged as the inside of condenser is keeping desired refrigerant level V, keeps thus the aperture of expansion valve 40.
Unlike this, above-mentioned first sensor 61 does not detect in the situation of cold-producing medium, and 70 of above-mentioned control parts can be closed above-mentioned expansion valve 40, and therefore, the refrigerant level of above-mentioned condenser 30 inside uprises, and keeps desired refrigerant level V.
On the other hand, the situation that cold-producing medium detected at the 3rd sensor 63 refers to, the refrigerant level of condenser 30 inside is higher than first sensor 61 height of living in.If above-mentioned the 3rd sensor 63 detects cold-producing medium, above-mentioned control part 70 can be opened above-mentioned expansion valve 40, and by the regulation of above-mentioned expansion valve 40 for to compare discharging refrigerant quickly with the situation of only having first sensor 61 and the second sensor 62 cold-producing medium to be detected.
Particularly, if first sensor 61 and the second sensor 62 detect respectively cold-producing medium, the current refrigerant liquid level that above-mentioned control part 70 is judged as condenser 30 inside is higher than desired refrigerant level V.At this moment, above-mentioned control part 70 can be opened above-mentioned expansion valve 40, or increases the aperture of above-mentioned expansion valve 40.In the situation that the 3rd sensor 63 detects cold-producing medium, it is current apparently higher than desired refrigerant level V situation that above-mentioned control part 70 is judged as the refrigerant level of condenser 30 inside.At this moment, above-mentioned control part 70 by the regulation of above-mentioned expansion valve 40 for to compare discharging refrigerant quickly with the situation of only having first sensor 61 and the second sensor 62 cold-producing medium to be detected.
So far, the embodiment that detects the refrigerant level of condenser 30 inside by two or three sensors has been described, but the present invention is not limited to this, the quantity that certainly can increase sensor to detect more accurately the liquid phase refrigerant liquid level of condenser 30 inside.
Below, with reference to accompanying drawing, illustrate each structural element that forms the turbo refrigerating machine 100 being associated with the second embodiment.
Fig. 6 and Fig. 7 mean the block diagram of the turbo refrigerating machine being associated with the second embodiment of the present invention.Fig. 8 A, Fig. 8 B are for the concept map of the duty of the turbo refrigerating machine being associated with the second embodiment of the present invention is described.
And the turbo refrigerating machine 100 being associated with the second embodiment of the present invention comprises: compound compressor 110, has a plurality of levels; Condenser 130, for making the cold-producing medium and the cooling water that flow into from above-mentioned compressor 110 carry out heat exchange; Phase separator 150, for the separated liquid phase refrigerant of cold-producing medium and the vapor phase refrigerant of discharging from above-mentioned condenser 130, and makes vapor phase refrigerant discharge to above-mentioned compressor 110; Evaporimeter 120, for making liquid phase refrigerant and the cold water of discharging from above-mentioned phase separator 150 carry out heat exchange; The first expansion valve 141, is located between above-mentioned condenser 130 and above-mentioned phase separator 150; The second expansion valve 142, is located between above-mentioned phase separator 150 and above-mentioned evaporimeter 120.
And above-mentioned turbo refrigerating machine 100 comprises that plural condenser refrigerant level detects sensing 161 to 163, along the increase direction of refrigerant level, be arranged at mutually different height, for detection of the refrigerant level of above-mentioned condenser 130 inside; And control part, the refrigerant level detecting according to above-mentioned condenser refrigerant level detecting sensor 161 to 163, regulates the aperture of above-mentioned the first expansion valve 141.
Above-mentioned compressor 110 has a plurality of levels, and as an embodiment, above-mentioned compressor 110 comprises low pressure compression unit 111 and high pressure compressed portion 112.Particularly, the cold-producing medium of discharging from above-mentioned evaporation part flows into above-mentioned low pressure compression unit 111, from the vapor phase refrigerant of above-mentioned phase separator 150 separation, to above-mentioned high pressure compressed portion 112, flows into.
As a result, in above-mentioned high pressure compressed portion 112, in the vapor phase refrigerant of phase separator 150 separation and together compressed at the cold-producing medium of low pressure compression unit 111 compressions, the work done during compression therefore above-mentioned compressor 110 being applied reduces.The work done during compression that above-mentioned compressor 110 is applied reduces, and brings the effect of the operating range increase of compressor 110.
And pool period 30 and the evaporimeter of above-mentioned condenser 130 and evaporimeter 120 and the turbo refrigerating machine 1 that is associated with the first embodiment have identical structure, therefore omit and specifically describe.
.The turbo refrigerating machine 100 being associated with the second embodiment, in order to increase the operating range of compressor 110, and improve the efficiency of turbo refrigerating machine 100, compressor 110 is divided into a plurality of levels, and phase separator (also can be called saving (economizer) device) 150 is set between condenser 130 and evaporimeter 120, the turbo refrigerating machine 1 that only has these aspects to be associated with the first embodiment has difference.
With reference to Fig. 8 A, above-mentioned condenser refrigerant level detecting sensor can comprise the first condenser refrigerant level detecting sensor 161 to the 3rd condenser refrigerant level detecting sensors 163 that set gradually along the increase direction of refrigerant level, desired refrigerant level V1 can be between above-mentioned the first condenser refrigerant level detecting sensor 161 and the second condenser refrigerant level detecting sensor 162 interval, above-mentioned the first condenser refrigerant level detecting sensor 161 to the 3rd condenser refrigerant level detecting sensors 163 can be static capacity sensors.
On the other hand, as the first embodiment, above-mentioned turbo refrigerating machine 100 also can comprise the cylinder (also can be called the first cylinder) 181 being connected with condenser 130.At this moment, above-mentioned the first condenser refrigerant level detecting sensor 161 to the 3rd condenser refrigerant level detecting sensors 163 are set in turn in above-mentioned the first cylinder 181 inside along the increase direction of refrigerant level.
And, above-mentioned control part 170 is according to the testing result of the first condenser refrigerant level detecting sensor 161 to the 3rd condenser refrigerant level detecting sensors 163, regulate open state and the aperture of the first expansion valve 141, and regulate thus the method for liquid phase refrigerant liquid level of condenser 130 inside identical with the method for the first embodiment.
On the other hand, the spacing (difference in height) between the 3rd condenser refrigerant level detecting sensor 163 and the second condenser refrigerant level detecting sensor 162 can be less than the spacing (difference in height) between the first condenser refrigerant level detecting sensor 161 and the second condenser refrigerant level detecting sensor 162.And the spacing of two adjacent condenser refrigerant level detecting sensors can determine according to the scope of desired refrigerant level V.
And, above-mentioned control part 170, if the first condenser refrigerant level detecting sensor 161 and the second condenser refrigerant level detecting sensor 162 detect respectively cold-producing medium, open the first expansion valve 141, if only have the first condenser refrigerant level detecting sensor 161 cold-producing medium to be detected, keep the aperture of the first expansion valve 141.
And, if the 3rd condenser refrigerant level detecting sensor 163 detects cold-producing medium, open the first expansion valves 141 of above-mentioned control part 170, and by the regulation of the first expansion valve 141 for only have the first condenser refrigerant level detecting sensor 161 and the second condenser refrigerant level detecting sensor 162 cold-producing medium R1 situation to be detected to compare discharging refrigerant quickly.
And, above-mentioned turbo refrigerating machine 100 also can comprise the plural phase separator refrigerant level detecting sensor 164 to 166 that is arranged at mutually different height along the increase direction of liquid phase refrigerant liquid level, to detect the liquid phase refrigerant liquid level R2 of above-mentioned phase separator 150 inside.The liquid phase refrigerant liquid level that above-mentioned control part 170 can detect according to phase separator refrigerant level detecting sensor 164 to 166, regulates the aperture of above-mentioned the second expansion valve 142.
At this, the interval that the desired refrigerant level V2 of phase separator 150 can be between above-mentioned first-phase separator refrigerant level detecting sensor 164 and second-phase separator refrigerant level detecting sensor 165.And above-mentioned first-phase separator refrigerant level detecting sensor 164 to third phase separator refrigerant level detecting sensor 166 can be static capacity sensor.
On the other hand, the spacing (difference in height) between third phase separator refrigerant level detecting sensor 166 and second-phase separator refrigerant level detecting sensor 165 can be less than the spacing (difference in height) between first-phase separator refrigerant level detecting sensor 164 and second-phase separator refrigerant level detecting sensor 165.And the spacing of two adjacent phase separator refrigerant level detecting sensors can determine according to the scope of desired refrigerant level V2.
On the other hand, as condenser 130, above-mentioned turbo refrigerating machine 100 also can comprise the cylinder (also can be called the second cylinder) 182 being connected with condenser 130.At this moment, the increase direction of above-mentioned first-phase separator refrigerant level detecting sensor to third phase separator refrigerant level detecting sensor 164 to 166 along refrigerant level is set in turn in above-mentioned the second cylinder 182 inside.
And, above-mentioned control part 170 is the testing result to third phase separator refrigerant level detecting sensor 166 according to first-phase separator refrigerant level detecting sensor 164, regulate open state and the aperture of the second expansion valve 142, and regulate thus the method for the liquid phase refrigerant liquid level of phase separator 150 inside, identical with the method for condenser 130.
Particularly, above-mentioned control part 170, if first-phase separator refrigerant level detecting sensor 164 and second-phase separator refrigerant level detecting sensor 165 detect respectively cold-producing medium, open the second expansion valve 142, if only have first-phase separator refrigerant level detecting sensor 164 cold-producing medium to be detected, keep the aperture of the second expansion valve 142.
And if third phase separator refrigerant level detecting sensor 166 detects cold-producing medium, above-mentioned control part 170 is opened the second expansion valve 142.Above-mentioned control part 170 can by the regulation of above-mentioned the second expansion valve for only have first-phase separator refrigerant level detecting sensor 164 and second-phase separator refrigerant level detecting sensor 165 cold-producing medium R2 situation to be detected to compare discharging refrigerant quickly.
On the other hand, above-mentioned the first expansion valve 141 can be high-pressure expansion valve, and the second expansion valve 142 can be inflated with low pressure valve.
Simply say, the refrigerant level that above-mentioned control part 170 can detect according to above-mentioned condenser refrigerant level detecting sensor 161 to 163 and above-mentioned phase separator refrigerant level detecting sensor 164 to 166, regulates respectively the aperture of above-mentioned the first expansion valve 141 and the second expansion valve 142.And above-mentioned control part 170 can be simultaneously or is regulated successively open state and the aperture of above-mentioned the first expansion valve 141 and the second expansion valve 142.According to the turbo refrigerating machine 100 being associated with the second embodiment, regulate the aperture of the first expansion valve 141 and the second expansion valve 142, make the refrigerant level of condenser 130 and phase separator 150 keep respectively the desired refrigerant level V1, the V2 that are scheduled to, can improve thus the reliability of turbo refrigerating machine 100.
Examine as mentioned above, according to the turbo refrigerating machine being associated with the first embodiment of the present invention, can accurately detect condenser refrigerant level, and easily regulate condenser refrigerant level according to testing result.
And, according to the turbo refrigerating machine being associated with the first embodiment of the present invention, when can reduce manufacturing expense, improve control response.
Preferred embodiment of the present invention described above is disclosed for illustration object; for general technical staff of the technical field of the invention; in thought of the present invention and scope, can carry out various modifications, change and additional, and these are revised, change and additional all should dropping in the claimed scope of invention.
Claims (20)
1. a turbo refrigerating machine, is characterized in that, comprising:
Compressor, comprises the impeller for compressed refrigerant;
Condenser, for making the cold-producing medium and the cooling water that flow into from above-mentioned compressor carry out heat exchange;
Evaporimeter, for making cold-producing medium and the cold water of discharging from above-mentioned condenser carry out heat exchange;
Expansion valve, is located between above-mentioned condenser and evaporimeter;
Plural sensor, is arranged at mutually different height along the increase direction of refrigerant level, for detection of the refrigerant level of the inside of above-mentioned condenser; And
Control part, the refrigerant level detecting according to the sensor, regulates the aperture of above-mentioned expansion valve.
2. turbo refrigerating machine according to claim 1, is characterized in that,
The sensor comprises first sensor to the three sensors that set gradually along the increase direction of refrigerant level,
The interval of desired refrigerant level between above-mentioned first sensor and the second sensor.
3. turbo refrigerating machine according to claim 2, is characterized in that,
Above-mentioned turbo refrigerating machine also comprises the cylinder being connected with above-mentioned condenser,
The direction that above-mentioned first sensor to the three sensors increase along refrigerant level is set in turn in the inside of above-mentioned cylinder.
4. according to the turbo refrigerating machine described in claim 2 or 3, it is characterized in that, if above-mentioned first sensor and the second sensor detect respectively cold-producing medium, above-mentioned control part is opened above-mentioned expansion valve, if only have above-mentioned first sensor cold-producing medium to be detected, above-mentioned control part keeps the aperture of expansion valve.
5. turbo refrigerating machine according to claim 4, is characterized in that,
If above-mentioned the 3rd sensor detects cold-producing medium, the open above-mentioned expansion valve of above-mentioned control part, and by the regulation of above-mentioned expansion valve for to compare discharging refrigerant quickly with the situation of only having first sensor and the second sensor cold-producing medium to be detected.
6. according to the turbo refrigerating machine described in claim 2 or 3, it is characterized in that, in the situation that first sensor does not detect cold-producing medium, above-mentioned control part is closed above-mentioned expansion valve.
7. turbo refrigerating machine according to claim 3, is characterized in that,
Above-mentioned cylinder is connected for accommodating the region of liquid phase refrigerant with above-mentioned condenser,
Above-mentioned liquid phase refrigerant keeps identical height in the inside of above-mentioned cylinder and the inside of above-mentioned condenser.
8. turbo refrigerating machine according to claim 2, is characterized in that, above-mentioned first sensor to the three sensors are static capacity sensor.
9. a turbo refrigerating machine, is characterized in that, comprising:
Compound compressor, has a plurality of levels;
Condenser, for making the cold-producing medium and the cooling water that flow into from above-mentioned compressor carry out heat exchange;
Phase separator, for the separated liquid phase refrigerant of cold-producing medium and the vapor phase refrigerant of discharging from above-mentioned condenser, and makes vapor phase refrigerant discharge to above-mentioned compressor;
Evaporimeter, for making liquid phase refrigerant and the cold water of discharging from above-mentioned phase separator carry out heat exchange;
The first expansion valve, is located between above-mentioned condenser and above-mentioned phase separator;
The second expansion valve, is located between above-mentioned phase separator and above-mentioned evaporimeter;
Plural condenser refrigerant level detecting sensor, the increase direction along refrigerant level, is arranged at mutually different height, for detection of the refrigerant level of the inside of above-mentioned condenser; And
Control part, the refrigerant level detecting according to above-mentioned condenser refrigerant level detecting sensor, regulates the aperture of above-mentioned the first expansion valve.
10. turbo refrigerating machine according to claim 9, is characterized in that,
Above-mentioned condenser refrigerant level detecting sensor comprises the first condenser refrigerant level detecting sensor to the three condenser refrigerant level detecting sensors that set gradually along the increase direction of refrigerant level,
The region of desired refrigerant level between above-mentioned the first condenser refrigerant level detecting sensor and the second condenser refrigerant level detecting sensor.
11. turbo refrigerating machines according to claim 10, is characterized in that,
Above-mentioned turbo refrigerating machine also comprises the cylinder being connected with above-mentioned condenser,
The direction that above-mentioned the first condenser refrigerant level detecting sensor to the three condenser refrigerant level detecting sensors increase along refrigerant level is set in turn in the inside of above-mentioned cylinder.
12. turbo refrigerating machines according to claim 10, is characterized in that, above-mentioned the first condenser refrigerant level detecting sensor to the three condenser refrigerant level detecting sensors are static capacity sensor.
13. turbo refrigerating machines according to claim 10, it is characterized in that, if above-mentioned the first condenser refrigerant level detecting sensor and the second condenser refrigerant level detecting sensor detect respectively cold-producing medium, above-mentioned control part is opened above-mentioned the first expansion valve, if only have above-mentioned the first condenser refrigerant level detecting sensor cold-producing medium to be detected, above-mentioned control part keeps the aperture of the first expansion valve.
14. turbo refrigerating machines according to claim 13, it is characterized in that, if above-mentioned the 3rd condenser refrigerant level detecting sensor detects cold-producing medium, open above-mentioned the first expansion valve of above-mentioned control part, and by the regulation of above-mentioned the first expansion valve for to compare discharging refrigerant quickly with the situation of only having the first condenser refrigerant level detecting sensor and the second condenser refrigerant level detecting sensor cold-producing medium to be detected.
15. turbo refrigerating machines according to claim 9, is characterized in that,
Above-mentioned turbo refrigerating machine also comprises plural phase separator refrigerant level detecting sensor, described phase separator refrigerant level detecting sensor is arranged at mutually different height along the increase direction of liquid phase refrigerant liquid level, liquid phase refrigerant liquid level for detection of the inside of above-mentioned phase separator
The liquid phase refrigerant liquid level that above-mentioned control part detects according to phase separator refrigerant level detecting sensor, regulates the aperture of above-mentioned the second expansion valve.
16. turbo refrigerating machines according to claim 15, is characterized in that,
Above-mentioned phase separator refrigerant level detecting sensor comprises that the first-phase separator refrigerant level detecting sensor setting gradually along the increase direction of refrigerant level is to third phase separator refrigerant level detecting sensor,
The interval of desired refrigerant level between above-mentioned first-phase separator refrigerant level detecting sensor and second-phase separator refrigerant level detecting sensor.
17. turbo refrigerating machines according to claim 16, it is characterized in that, if above-mentioned first-phase separator refrigerant level detecting sensor and second-phase separator refrigerant level detecting sensor detect respectively cold-producing medium, above-mentioned control part is opened above-mentioned the second expansion valve, if only have above-mentioned first-phase separator refrigerant level detecting sensor cold-producing medium to be detected, above-mentioned control part keeps the aperture of the second expansion valve.
18. turbo refrigerating machines according to claim 17, it is characterized in that, if above-mentioned third phase separator refrigerant level detecting sensor detects cold-producing medium, open above-mentioned the second expansion valve of above-mentioned control part, and by the regulation of above-mentioned the second expansion valve for to compare discharging refrigerant quickly with the situation of only having first-phase separator refrigerant level detecting sensor and second-phase separator refrigerant level detecting sensor cold-producing medium to be detected.
19. turbo refrigerating machines according to claim 9, is characterized in that, above-mentioned first-phase separator refrigerant level detecting sensor to third phase separator refrigerant level detecting sensor is static capacity sensor.
20. 1 kinds of turbo refrigerating machines, is characterized in that, comprising:
Compound compressor, has a plurality of levels;
Condenser, for making the cold-producing medium and the cooling water that flow into from above-mentioned compressor carry out heat exchange;
Phase separator, for the separated liquid phase refrigerant of cold-producing medium and the vapor phase refrigerant of discharging from above-mentioned condenser, and makes vapor phase refrigerant discharge to above-mentioned compressor;
Evaporimeter, for making liquid phase refrigerant and the cold water of discharging from above-mentioned phase separator carry out heat exchange;
The first expansion valve, is located between above-mentioned condenser and above-mentioned phase separator;
The second expansion valve, is located between above-mentioned phase separator and above-mentioned evaporimeter;
Plural condenser refrigerant level detecting sensor, is arranged at mutually different height along the increase direction of refrigerant level, for detection of the refrigerant level of the inside of above-mentioned condenser;
Plural phase separator refrigerant level detecting sensor, is arranged at mutually different height along the increase direction of refrigerant level, for detection of the refrigerant level of the inside of above-mentioned phase separator; And
Control part, the refrigerant level detecting according to above-mentioned condenser refrigerant level detecting sensor and above-mentioned phase separator refrigerant level detecting sensor, regulates respectively the aperture of above-mentioned the first expansion valve and the second expansion valve.
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