CN107560041B - Water chilling unit - Google Patents
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- CN107560041B CN107560041B CN201710823746.6A CN201710823746A CN107560041B CN 107560041 B CN107560041 B CN 107560041B CN 201710823746 A CN201710823746 A CN 201710823746A CN 107560041 B CN107560041 B CN 107560041B
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Abstract
The invention discloses a water chilling unit, which comprises: the compressor comprises a shell, a first compression mechanism, a second compression mechanism and a motor assembly, wherein a first air outlet of the first compression mechanism is communicated with a second air inlet of the second compression mechanism through an air supplementing pipe; a condenser; the economizer is provided with an inlet, a gas outlet and a liquid outlet, the inlet is communicated with the other end of the condenser, and the gas outlet is communicated with the gas inlet through a first pipeline; an evaporator. According to the water chilling unit, the effect of cooling the motor assembly can be achieved, the energy efficiency of the water chilling unit can be improved, and the safety and the reliability of the operation of the compressor can be improved.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a water chilling unit.
Background
In order to achieve higher energy efficiency of centrifugal chiller units, the use of two-stage compression centrifugal compressors is gradually beginning. In order to realize a compact structure and good sealing performance of the compressor, the industry mainly adopts a semi-closed or fully-closed centrifugal compressor structure, and a motor stator and a rotor of the compressor are wrapped by a closed shell group formed by the compressor and a motor shell. The stator and rotor cooling of the motor is achieved by means of refrigerant flow through a set of piping system external to the compressor. The traditional motor cooling system design is that liquid is taken from the bottom of a condenser, and a refrigerant flows into a cavity where a stator and a rotor inside a motor shell are located through a pipeline between the condenser and the motor shell and through holes (or flow channels) which are arranged on the motor shell and run through the inside and the outside, a flow channel for flowing and heat exchanging of the refrigerant is arranged in the cavity, and then the refrigerant flows out through other through holes (or flow channels) on the motor shell and is discharged into an evaporator through a pipeline between the motor shell and an evaporator.
However, in the conventional motor cooling system, the refrigerant flows by utilizing the pressure difference between the condenser and the evaporator, and the situation of transition liquid supply often occurs, so that the liquid in the inner cavity of the motor shell is excessive. In addition, although the temperature of the inner cavity chamber of the motor shell is slightly higher than the evaporation temperature, the temperature is still lower, so that the surface of the motor shell and the wiring terminal part are easy to dewfall, and the difficulty of heat preservation design is increased. In addition, impurities are easy to accumulate in the refrigerant liquid at the bottom of the condenser, so a filter is required to be arranged on the pipeline.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the refrigerating unit which has the advantages of convenience for cooling the motor assembly and high unit energy efficiency.
The water chilling unit according to the embodiment of the invention comprises: the compressor comprises a shell, a first compression mechanism, a second compression mechanism and a motor assembly, wherein the first compression mechanism and the second compression mechanism are arranged in the shell, the first compression mechanism is provided with a first compression cavity, the first compression cavity is provided with a first air inlet and a first air outlet, the second compression mechanism is provided with a second compression cavity, the second compression cavity is provided with a second air inlet and a second air outlet, the first air outlet is communicated with the second air inlet through an air supplementing pipe, a closed cavity is defined in the shell, the motor assembly is positioned in the cavity, a heat exchange flow channel is arranged in the cavity, the shell is provided with an air inlet and an air outlet which are communicated with the heat exchange flow channel, and the air outlet is communicated with the air supplementing pipe; one end of the condenser is communicated with the second air outlet; the economizer is provided with an inlet, a gas outlet and a liquid outlet, the inlet is communicated with the other end of the condenser, and the gas outlet is communicated with the gas inlet through a first pipeline; and one end of the evaporator is communicated with the liquid outlet, and the other end of the evaporator is communicated with the first air inlet.
According to the water chilling unit provided by the embodiment of the invention, the gas outlet of the economizer is communicated with the gas inlet on the shell through the first pipeline, and the gas outlet on the shell is communicated with the gas supplementing pipe between the first gas outlet and the second gas inlet, so that steam from the gas outlet of the economizer can firstly enter the heat exchange flow channel in the cavity and then enters the second compression cavity for compression, not only can the effect of cooling the motor assembly be achieved, but also the energy efficiency of the water chilling unit can be improved, and the safety and the reliability of the operation of the compressor can be improved.
According to some embodiments of the invention, a second conduit is provided between the gas outlet and the gas supply pipe.
In some embodiments of the invention, a flow restriction is provided on the second conduit.
In some embodiments of the invention, the flow restricting device is an electrically operated valve.
According to some embodiments of the invention, the first compression mechanism and the second compression mechanism are located at both ends of the housing, the first compression mechanism, the second compression mechanism and the housing defining the chamber.
According to some embodiments of the invention, the heat exchange flow channel is a plurality of flow channels.
In some embodiments of the invention, the heat exchange flow passage is provided in at least one of between a stator of the electric machine assembly and the housing, and between a rotor of the electric machine assembly and the stator.
According to some embodiments of the invention, at least one of between the condenser and the economizer and between the economizer and the evaporator is provided with a throttling device.
In some embodiments of the invention, the restriction device is an orifice plate, a capillary tube, or an electronic expansion valve.
According to some embodiments of the invention, the first pipeline is provided with a solenoid valve for controlling on-off of the first pipeline.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a water chiller according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a water chilling unit according to an embodiment of the present invention.
Reference numerals:
the water chiller 100 is provided with a water inlet,
the compressor 1, the housing 11, the air inlet 111, the air outlet 112,
the first compression mechanism 12, the first air inlet 121, the first air outlet 122,
a second compression mechanism 13, a second air inlet 131, a second air outlet 132, an air supplement pipe 133,
the motor assembly 14, the stator 141, the rotor 142,
the chamber (15) is provided with a plurality of cavities,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "inner", "outer", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A water chilling unit 100 according to an embodiment of the present invention is described below with reference to fig. 1 and 2.
As shown in fig. 1 and 2, a water chilling unit 100 according to an embodiment of the present invention includes a compressor 1, a condenser 2, an economizer 3, and an evaporator 4.
Specifically, the compressor 1 includes a housing 11, a first compression mechanism 12, a second compression mechanism 13, and a motor assembly 14. The compressor 1 may further include a third compression mechanism, a fourth compression mechanism, and the like, which is not limited herein.
The first compression mechanism 12 and the second compression mechanism 13 are arranged in the housing 11, the first compression mechanism 12 has a first compression cavity, the first compression cavity has a first air inlet 121 and a first air outlet 122, the second compression mechanism 13 has a second compression cavity, the second compression cavity has a second air inlet 131 and a second air outlet 132, the first air outlet 122 is communicated with the second air inlet 131 through an air supplement pipe 133, a closed chamber 15 is defined in the housing 11, the motor assembly 14 is positioned in the chamber 15, a heat exchange flow channel (not shown) is arranged in the chamber 15, the housing 11 has an air inlet 111 and an air outlet 112 communicated with the heat exchange flow channel, and the air outlet 112 is communicated with the air supplement pipe 133.
One end of the condenser 2 communicates with the second gas outlet 132, the economizer 3 has an inlet 33, a gas outlet 34, and a liquid outlet 35, the inlet 33 communicates with the other end of the condenser 2, the gas outlet 34 communicates with the gas inlet 111 through the first pipe 31, one end of the evaporator 4 communicates with the liquid outlet 35, and the other end of the evaporator 4 communicates with the first gas inlet 121.
Most of steam in the economizer 3 is gaseous state, and the minimum is liquid, and steam inside the economizer 3 enters the heat exchange flow channel in the chamber 15 through the gas outlet 34, the first pipeline 31 and the gas inlet 111, and the steam in the heat exchange flow channel exchanges heat in the chamber 15, and the steam after heat exchange flows into the air supplement pipe 133 through the gas outlet 112, and then enters the second compression cavity through the second gas inlet 131 to be compressed.
In the related art, the steam from the gas outlet 34 of the economizer 3 is directly communicated with the air supplementing pipe 133, in the invention, the steam from the gas outlet 34 firstly passes through the heat exchange flow channel in the cavity 15, then enters the air supplementing pipe 133, and then enters the second compression mechanism 13 for compression, so that the power consumption of the compressor 1 is saved, the heat is finally discharged into the environment through the condenser 2, the refrigerating capacity of the evaporator 4 is saved, and the energy efficiency of the water chilling unit 100 is improved. Meanwhile, a small amount of liquid drops contained in the air supply of the economizer 3 absorb the heat generated by the motor assembly 14 in the flowing process and then evaporate into a gaseous state, so that the risk of liquid-carrying work of the compressor 1 is avoided, and the safety and the reliability of the work of the compressor 1 are improved. In addition, because the gas inlet 111 is communicated with the gas outlet 34 of the economizer 3, the refrigerant in the heat exchange flow channel is gas, the possibility of carrying impurities in gas cooling is extremely low, a cooling system does not need to be provided with a complex filtering device, and the usability of the unit is improved.
According to the water chilling unit 100 provided by the embodiment of the invention, the gas outlet 34 of the economizer 3 is communicated with the gas inlet 111 on the shell 11 through the first pipeline 31, and the gas outlet 112 on the shell 11 is communicated with the gas supplementing pipe 133 between the first gas outlet 122 and the second gas inlet 131, so that steam from the gas outlet 34 of the economizer 3 firstly enters the heat exchange flow channel in the cavity 15 and then enters the second compression cavity for compression, not only can the effect of cooling the motor assembly 14 be achieved, but also the energy efficiency of the water chilling unit 100 can be improved, and the safety and the reliability of the operation of the compressor 1 can be improved.
In some embodiments of the present invention, as shown in fig. 2, a second conduit 32 is provided between the gas outlet 34 and the air supplement pipe 133. That is, the second pipe 32 is connected in parallel with the combination of the first pipe 31 and the heat exchange flow channel. Therefore, a part of the steam from the gas outlet 34 can directly enter the air supplementing pipe 133. When the amount of steam required for cooling the motor assembly 14 is small, a large amount of steam entering the heat exchange flow passage in the chamber 15 may cause the temperature in the chamber 15 to be too low, and condensation may occur outside the housing 11. At this time, part of the steam can directly flow into the air supplement pipe 133 and then flow into the second compression cavity for compression, so that the effect of cooling the motor assembly 14 can be achieved, condensation on the shell 11 can be prevented, and in addition, the steam coming out of the gas outlet 34 directly enters the air supplement pipe 133, and the energy efficiency of the compressor 1 can be improved.
Further, as shown in fig. 2, a flow restriction 321 is disposed on the second pipe 32. Because the steam in the first pipeline 31 firstly enters the cavity 15 to cool the motor assembly 14, the pressure loss of the refrigerant in the flow channel is large, and the flow limiting device 321 is arranged on the second pipeline 32 with small pressure loss, so that the sufficient refrigerant flow in the heat exchange flow channel in the cavity 15 can be ensured, the cooling reliability of the motor assembly 14 can be ensured, and the working reliability of the compressor 1 can be improved.
Specifically, as shown in fig. 2, the flow restriction 321 may be an electrically operated valve. The electric valve can control the flow of the refrigerant through the change of the area, so that the sufficient flow of the refrigerant in the heat exchange flow channel in the cavity 15 is ensured, the cooling reliability of the motor assembly 14 is ensured, and the working reliability of the compressor 1 is improved.
In some embodiments of the present invention, as shown in fig. 1 and 2, the first compression mechanism 12 and the second compression mechanism 13 are located at both ends of the housing 11, and the first compression mechanism 12, the second compression mechanism 13, and the housing 11 define a chamber 15. That is, the first compression mechanism 12 and the second compression mechanism 13 are respectively located at two ends of the housing 11, the first compression mechanism 12 is connected with the inner wall of the housing 11, the second compression mechanism 13 is connected with the inner wall of the housing 11, the motor assembly 14 is located between the first compression mechanism 12 and the second compression mechanism 13, and the motor assembly 14 is located in the closed chamber 15 defined by the first compression mechanism 12, the housing 11 and the second compression mechanism 13. Both ends of the motor assembly 14 have output shafts and are respectively connected with the first compression mechanism 12 and the second compression mechanism 13. Thereby facilitating the layout of the internal structure of the compressor 1 and making the compressor 1 work more reliable.
Of course, the present invention is not limited thereto, and the first compression mechanism 12 may be connected to the second compression mechanism 13, the first compression mechanism 12 and the second compression mechanism 13 are located at one end of the housing 11, and the motor assembly 14 is located at the other end of the housing 11, whereby the variety of structures of the compressor 1 may be improved to meet different requirements.
In some embodiments of the present invention, the number of the heat exchange flow channels is multiple, multiple heat exchange flow channels are arranged in parallel, one end of each heat exchange flow channel is communicated with the air inlet 111, and the other end of each heat exchange flow channel is communicated with the air outlet 112. The heat exchange efficiency of the refrigerant and the heat in the strong force can be increased through the plurality of heat exchange flow channels, the heat exchange effect is improved, the cooling speed of the motor assembly 14 is increased, the working reliability of the motor assembly 14 is guaranteed, and the working reliability of the compressor 1 is further guaranteed.
Further, the motor assembly 14 includes a stator 141 and a rotor 142, the stator 141 is rotatably disposed outside the rotor 142, and the heat exchanging flow passage is disposed in at least one of between the stator 141 of the motor assembly 14 and the housing 11 and between the rotor 142 of the motor assembly 14 and the stator 141. That is, the heat exchange flow path may be provided only between the stator 141 of the motor assembly 14 and the housing 11, or the heat exchange flow path may be provided only between the rotor 142 of the motor assembly 14 and the stator 141, or the heat exchange flow path may be provided between the stator 141 and the housing 11, and between the stator 141 and the rotor 142. Therefore, the heat exchange flow channel and the heat in the cavity 15 can exchange heat fully, the heat exchange efficiency is improved, the cooling speed of the motor assembly 14 is increased, the working reliability of the motor assembly 14 is ensured, and the working reliability of the compressor 1 is further ensured.
In some embodiments of the invention, as shown in fig. 1 and 2, at least one of between the condenser 2 and the economizer 3, and between the economizer 3 and the evaporator 4 is provided with a throttling device 5. That is, the throttling device 5 is provided only between the condenser 2 and the economizer 3, or the throttling device 5 is provided only between the economizer 3 and the evaporator 4, or the throttling device 5 is provided between the condenser 2 and the economizer 3, or between the economizer 3 and the evaporator 4. For example, in the example shown in fig. 1 and 2, the throttling devices 5 are provided between the condenser 2 and the economizer 3, and between the economizer 3 and the evaporator 4, so that the energy efficiency of the water chiller 100 can be improved.
Further, the throttling device 5 may be an orifice plate, a capillary tube, or an electronic expansion valve. This can increase the diversity of the structure of the water chiller 100. Specifically, in the example shown in fig. 1 and 2, the throttling devices 5 are provided between the condenser 2 and the economizer 3, and between the economizer 3 and the evaporator 4, and the throttling devices 5 are throttling orifice plates.
In some embodiments of the present invention, the first pipe 31 is provided with a solenoid valve 311 for controlling on/off of the first pipe. Thereby facilitating control of cooling of the motor assembly 14, when the motor assembly 14 does not require cooling, the first conduit 31 may be blocked by the solenoid valve 311. In addition, an electromagnetic valve 311 is arranged between the air outlet 112 and the air supplement pipe 133 to control the on-off between the air outlet 112 and the air supplement pipe 133.
While the water chiller 100 according to two embodiments of the present invention is described below with reference to fig. 1 and 2, it is to be understood that the following description is intended to be illustrative only and is not to be construed as limiting the invention.
Example one
As shown in fig. 1, a water chiller 100 according to an embodiment of the present invention includes a compressor 1, a condenser 2, an economizer 3, and an evaporator 4.
Specifically, the compressor 1 includes a housing 11, a first compression mechanism 12, a second compression mechanism 13, and a motor assembly 14. The first compression mechanism 12 and the second compression mechanism 13 are respectively arranged in the shell 11 and respectively located at two ends of the shell 11, and the motor assembly 14 is located between the first compression mechanism 12 and the second compression mechanism 13 and located in a closed chamber 15 formed by the first compression mechanism 12, the second compression mechanism 13 and the shell 11.
The first compression mechanism 12 has a first compression chamber having a first air inlet 121 and a first air outlet 122, the second compression mechanism 13 has a second compression chamber having a second air inlet 131 and a second air outlet 132, and the first air outlet 122 is communicated with the second air inlet 131 through an air supplement pipe 133. The motor assembly 14 includes a stator 141 and a rotor 142, the stator 141 is disposed outside the rotor 142, a plurality of heat exchanging flow channels are disposed in the chamber 15, and a part of the plurality of heat exchanging flow channels is disposed between the stator 141 and the rotor 142, and a part of the plurality of heat exchanging flow channels is disposed between the stator 141 and the housing 11. The shell 11 has an air inlet 111 and an air outlet 112, one end of each heat exchange flow passage is respectively communicated with the air inlet 111, and the other end of each heat exchange flow passage is respectively communicated with the air outlet 112. In addition, the air outlet 112 communicates with the air supplement pipe 133.
One end of the condenser 2 communicates with the second gas outlet 132, the economizer 3 has an inlet 33, a gas outlet 34, and a liquid outlet 35, the inlet 33 communicates with the other end of the condenser 2, the gas outlet 34 communicates with the gas inlet 111 through the first pipe 31, one end of the evaporator 4 communicates with the liquid outlet 35, and the other end of the evaporator 4 communicates with the first gas inlet 121.
Most of steam in the economizer 3 is in a gaseous state and is in a liquid state in a very small amount, the steam inside the economizer 3 enters a heat exchange flow channel in the chamber 15 through the gas outlet 34, the first pipeline 31 and the gas inlet 111, the steam in the heat exchange flow channel exchanges heat in the chamber 15, the steam after heat exchange flows into the gas supplementing pipe 133 through the gas outlet 112, and then enters the second compression cavity through the second gas inlet 131 to be compressed.
According to the water chilling unit 100 provided by the embodiment of the invention, the gas outlet 34 of the economizer 3 is communicated with the gas inlet 111 on the shell 11 through the first pipeline 31, and the gas outlet 112 on the shell 11 is communicated with the gas supplementing pipe 133 between the first gas outlet 122 and the second gas inlet 131, so that steam from the gas outlet 34 of the economizer 3 firstly enters the heat exchange flow channel in the cavity 15 and then enters the second compression cavity for compression, not only can the effect of cooling the motor assembly 14 be achieved, but also the energy efficiency of the water chilling unit 100 can be improved, and the safety and the reliability of the operation of the compressor 1 can be improved.
In addition, a throttling device 5 is arranged between the condenser 2 and the economizer 3 and between the economizer 3 and the evaporator 4, and the throttling device 5 is a throttling orifice plate. An electromagnetic valve 311 for controlling the on-off of the first pipeline 31 is arranged on the first pipeline, and an electromagnetic valve 311 is arranged between the air outlet 112 and the air supplement pipe 133 to control the on-off of the air outlet 112 and the air supplement pipe 133.
In addition, the motor assembly 14 is connected to the micro-cabinet 6 to control the operation of the motor assembly 14.
Example two
As shown in fig. 2, the present embodiment has the same structure as the embodiment, wherein the same components are denoted by the same reference numerals, and only the second duct 32 is further provided between the gas outlet 34 and the air supplement pipe 133. Not only can play the effect of cooling motor element 14, can prevent to appear condensation on the casing 11 simultaneously, in addition, the steam that gas outlet 34 came out directly gets into in the air supplement pipe 133, can also improve the efficiency of compressor 1.
In addition, the second pipeline 32 is provided with a flow limiting device 321, such as an electric valve, because the steam in the first pipeline 31 firstly enters the cavity 15 to cool the motor assembly 14, the pressure loss of the refrigerant in the flow channel is large, and the flow limiting device 321 is arranged on the second pipeline 32 with small pressure loss, so that the sufficient refrigerant flow in the heat exchange flow channel in the cavity 15 can be ensured, the cooling reliability of the motor assembly 14 can be ensured, and the working reliability of the compressor 1 can be improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A chiller, comprising:
the compressor comprises a shell, a first compression mechanism, a second compression mechanism and a motor assembly, wherein the first compression mechanism and the second compression mechanism are arranged in the shell, the first compression mechanism is provided with a first compression cavity, the first compression cavity is provided with a first air inlet and a first air outlet, the second compression mechanism is provided with a second compression cavity, the second compression cavity is provided with a second air inlet and a second air outlet, the first air outlet is communicated with the second air inlet through an air supplementing pipe, a closed cavity is defined in the shell, the motor assembly is positioned in the cavity, a heat exchange flow channel is arranged in the cavity, the shell is provided with an air inlet and an air outlet which are communicated with the heat exchange flow channel, and the air outlet is communicated with the air supplementing pipe;
one end of the condenser is communicated with the second air outlet;
the economizer is provided with an inlet, a gas outlet and a liquid outlet, the inlet is communicated with the other end of the condenser, the gas outlet is communicated with the gas inlet through a first pipeline, and a second pipeline is arranged between the gas outlet and the gas supplementing pipe;
and one end of the evaporator is communicated with the liquid outlet, and the other end of the evaporator is communicated with the first air inlet.
2. The chiller according to claim 1 wherein said second conduit is provided with a flow restriction.
3. The chiller according to claim 2 wherein said flow restricting device is an electrically operated valve.
4. The water chilling unit according to claim 1, wherein the first and second compression mechanisms are located at opposite ends of the housing, the first and second compression mechanisms and the housing defining the chamber.
5. The chiller according to claim 1 wherein said heat exchange flow path is a plurality of flow paths.
6. The chiller according to claim 5 wherein said heat exchange flow path is provided in at least one of between a stator of said motor assembly and said housing, and between a rotor and a stator of said motor assembly.
7. The chiller according to claim 1 wherein at least one of between said condenser and said economizer and between said economizer and said evaporator is provided with a throttling device.
8. The chiller according to claim 7 wherein said throttling means is an orifice plate, a capillary tube or an electronic expansion valve.
9. The water chilling unit according to claim 1, wherein the first pipeline is provided with an electromagnetic valve for controlling on-off of the first pipeline.
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| CN201710823746.6A CN107560041B (en) | 2017-09-13 | 2017-09-13 | Water chilling unit |
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| CN201710823746.6A CN107560041B (en) | 2017-09-13 | 2017-09-13 | Water chilling unit |
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| CN107560041B true CN107560041B (en) | 2020-12-04 |
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| CN110207426B (en) * | 2019-07-03 | 2024-07-23 | 天津飞旋科技股份有限公司 | Mixed cooling structure for refrigeration compressor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07180917A (en) * | 1993-12-24 | 1995-07-18 | Kobe Steel Ltd | Screw tube refrigerator |
| CN104896780A (en) * | 2014-03-05 | 2015-09-09 | 荏原冷热系统株式会社 | Turbine refrigerator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG89409A1 (en) * | 2000-10-13 | 2002-06-18 | Mitsubishi Heavy Ind Ltd | Multistage compression refrigeration machine for supplying refrigerant from intercooler to cool rotating machine and lubricating oil |
| CN104566852B (en) * | 2014-12-15 | 2017-02-22 | 珠海格力电器股份有限公司 | Air conditioner and motor cooling method of air conditioner |
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2017
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07180917A (en) * | 1993-12-24 | 1995-07-18 | Kobe Steel Ltd | Screw tube refrigerator |
| CN104896780A (en) * | 2014-03-05 | 2015-09-09 | 荏原冷热系统株式会社 | Turbine refrigerator |
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