CN111365907A - Refrigerant circulation system and refrigerating device - Google Patents

Refrigerant circulation system and refrigerating device Download PDF

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Publication number
CN111365907A
CN111365907A CN201811599329.9A CN201811599329A CN111365907A CN 111365907 A CN111365907 A CN 111365907A CN 201811599329 A CN201811599329 A CN 201811599329A CN 111365907 A CN111365907 A CN 111365907A
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CN
China
Prior art keywords
flow path
refrigerant
cooling flow
lubricating
main
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811599329.9A
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Chinese (zh)
Inventor
刘华
张治平
李宏波
钟瑞兴
蒋楠
蒋彩云
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201811599329.9A priority Critical patent/CN111365907A/en
Publication of CN111365907A publication Critical patent/CN111365907A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/40Fluid line arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00Compressor arrangements
    • F25B31/002Lubrication
    • F25B31/004Lubrication oil recirculating arrangements

Abstract

The invention provides a refrigerant circulation system and a refrigerating device. The refrigerant circulation system includes: a main refrigerant circuit including a compressor for driving a refrigerant to circulate in the main refrigerant circuit; a lubricating flow path, the first end of which is communicated with the main refrigerant loop to lead out the liquid refrigerant in the main refrigerant loop, and the second end of which is connected with the bearing chamber of the compressor to lead in the liquid refrigerant to the bearing chamber for lubricating the bearing of the compressor; the first end and the second end of the cooling flow path are respectively communicated with two positions of the main refrigerant loop so as to lead out the refrigerant of the main refrigerant loop to be used for cooling the liquid refrigerant of the lubricating flow path; and the heat exchanger is used for heat exchange of the cooling flow path and the lubricating flow path and comprises a first heat exchange channel and a second heat exchange channel, the first heat exchange channel is connected in series with the lubricating flow path, and the second heat exchange channel is connected in series with the cooling flow path. The refrigerant circulating system and the refrigerating device are simpler and more compact.

Description

Refrigerant circulation system and refrigerating device
Technical Field
The invention relates to the technical field of refrigeration, in particular to a refrigerant circulating system and a refrigerating device.
Background
The main refrigerant circuit of the refrigerant cycle system generally includes a compressor, a condenser, a throttling device and an evaporator. A refrigerant cycle system is a cycle system commonly used in some refrigeration apparatuses such as air conditioners and refrigerators, and some heating apparatuses such as heat pump apparatuses. The bearing chamber of the compressor in the refrigerant circulation system needs to be lubricated, and a lubricating system is usually additionally arranged to lubricate the compressor.
Disclosure of Invention
The invention aims to provide a refrigerant circulation system which is used for lubricating a bearing of a bearing chamber of a compressor by leading out liquid refrigerant in a main refrigerant loop and cooling a lubricating flow path by using the refrigerant led out from the main refrigerant loop. The invention also provides a refrigerating device applying the refrigerant circulating system.
The invention discloses a refrigerant circulating system, comprising:
the main refrigerant loop comprises a compressor for driving a refrigerant to circulate in the main refrigerant loop;
a lubricating flow path, a first end of which is communicated with the main refrigerant loop to lead out liquid refrigerant in the main refrigerant loop, and a second end of which is connected with a bearing chamber of the compressor to lead in the liquid refrigerant to the bearing chamber for lubricating a bearing of the compressor; and
a cooling flow path, wherein a first end and a second end of the cooling flow path are respectively communicated with two positions of the main refrigerant loop so as to lead out the refrigerant of the main refrigerant loop to cool the liquid refrigerant of the lubricating flow path;
the heat exchanger is used for exchanging heat between the cooling flow path and the lubricating flow path and comprises a first heat exchange channel and a second heat exchange channel, the first heat exchange channel is connected in series with the lubricating flow path, and the second heat exchange channel is connected in series with the cooling flow path.
In some embodiments, the refrigerant introduced from the cooling flow path is a liquid refrigerant.
In some embodiments of the present invention, the,
the first end of the lubricating flow path is communicated with a condenser of the main refrigerant loop; and/or the first end of the cooling flow path is communicated with a condenser of the main refrigerant loop.
In some embodiments, the heat exchanger is a plate heat exchanger.
In some embodiments, the cooling flow path comprises a cooling flow path throttling device disposed between the first end thereof and the inlet of the second heat exchange channel.
In some embodiments, the cooling flow path throttling device comprises an orifice plate
In some embodiments, the cooling flow path throttling device has an adjustable throttle opening.
In some embodiments, the refrigerant circulation system includes a tee joint, a first port of the tee joint is communicated with the main refrigerant loop, a second port of the tee joint is communicated with the first end of the lubrication flow path, and a third port of the tee joint is communicated with the first end of the cooling flow path.
In some embodiments, the refrigerant circulation system includes a hydraulic pump disposed between the first port of the tee joint and the main refrigerant circuit for delivering liquid refrigerant from the main refrigerant circuit to the first port.
The invention discloses a refrigerating device in a second aspect, which comprises any one refrigerant circulating system.
Based on the refrigerant circulating system provided by the invention, the liquid refrigerant in the main refrigerant loop is led out to lubricate the bearing in the bearing chamber of the compressor, and a lubricating system is not additionally arranged to lubricate the compressor, so that the structural arrangement of the refrigerant circulating system is favorably reduced. Meanwhile, the lubricating flow path is cooled by the refrigerant led out from the main refrigerant loop, so that the structural arrangement of the refrigerant circulating system can be further reduced while the reliability of the lubricating flow path is ensured, and the refrigerant circulating system is simpler and more compact.
The invention also provides a refrigerating device using the refrigerant circulating system, which has corresponding beneficial effects.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic structural diagram illustrating a cooling flow path of a refrigerant circulation system cooling a lubrication flow path according to an embodiment of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The refrigerant circulating system of the embodiment of the invention comprises a main refrigerant loop, a lubricating flow path, a cooling flow path and a heat exchanger 1. The main refrigerant circuit includes a compressor for driving the refrigerant to circulate within the main refrigerant circuit. The main refrigerant circuit is used for performing a refrigeration cycle and/or a heating cycle, and transferring heat in environments with different temperatures. The main refrigerant loop mainly comprises a compressor, a condenser, a throttling device and an evaporator. The main refrigerant circuit, which can be switched between a refrigeration cycle and a heating cycle, generally includes a selector valve. Some refrigerant circulation systems also have an economizer in the main refrigerant circuit.
As shown in fig. 1, a first end of the lubrication flow path is communicated with the main refrigerant circuit to draw out the liquid refrigerant in the main refrigerant circuit, and a second end of the lubrication flow path is connected with a bearing chamber of the compressor to introduce the liquid refrigerant into the bearing chamber for lubricating a bearing of the compressor. The refrigerant in this embodiment can transfer heat in the refrigeration cycle, and can also be used to lubricate the compressor bearing by using a liquid refrigerant. The lubricating flow path leads out liquid refrigerant which can be used for lubricating at a proper position of the main refrigerant loop through a first end, for example, the liquid refrigerant is led out at a condenser outlet of the main refrigerant loop, a position between a throttling device (such as an expansion valve) and a condenser, an economizer (if the economizer is arranged) and the like, and then the liquid refrigerant flows to a second end of the lubricating flow path to be sent into a bearing chamber of the compressor to lubricate the bearing of the compressor.
The first end and the second end of the cooling flow path are respectively communicated with two positions of the main refrigerant loop so as to lead out the refrigerant of the main refrigerant loop to be used for cooling the liquid refrigerant of the lubricating flow path. In order to satisfy the temperature and pressure requirements during lubrication and maintain the liquid stability of the lubricating liquid, the liquid refrigerant in the lubricating flow path needs to be cooled, and the cooling flow path is provided in the refrigerant circulation system of this embodiment to cool the liquid refrigerant in the lubricating flow path before lubrication. The cooling medium in the cooling flow path of the present embodiment is also a refrigerant that is drawn from the main refrigerant circuit through the first end of the cooling flow path communicating with one position of the main refrigerant circuit, and after cooling the lubrication flow path, returns to the main refrigerant circuit through the second end of the cooling flow path communicating with another position of the main refrigerant circuit to participate in the refrigeration cycle of the main refrigerant circuit.
As shown in fig. 1, the heat exchanger 1 includes a first heat exchange channel and a second heat exchange channel, the first heat exchange channel is connected in series to the lubrication flow path, and the second heat exchange channel is connected in series to the cooling flow path. The heat exchanger 1 is arranged to cool the liquid refrigerant in the lubricating flow path, which is helpful for improving the cooling effect.
The refrigerant circulation system of this embodiment lubricates the bearing of the bearing chamber of the compressor through the liquid refrigerant that can be used for lubrication in utilizing the main refrigerant return circuit, need not additionally set up lubricating system again and lubricate the compressor, is favorable to reducing refrigerant circulation system's structural arrangement. And the lubricating flow path is cooled by the refrigerant led out from the main refrigerant loop, so that the structural arrangement of the refrigerant circulating system can be further reduced while the reliability of the lubricating flow path is ensured, and the refrigerant circulating system is simpler and more compact. Meanwhile, the refrigerant in the cooling flow path returns to the main refrigerant loop for refrigeration cycle after cooling the lubricating flow path, which is beneficial to saving resources and improving the use efficiency of the refrigerant.
In some embodiments, the refrigerant introduced from the cooling flow path is a liquid refrigerant. The lubricating loop is cooled by leading out the liquid refrigerant from the main refrigerant loop, so that the cooling effect is improved.
In some embodiments, the refrigerant introduced from the cooling flow path may also be a gaseous refrigerant.
In some embodiments, the first end of the lubrication flow path is in communication with a condenser of the primary refrigerant circuit; and/or the first end of the cooling flow path is communicated with a condenser of the main refrigerant loop. Through the arrangement, the lubricating flow path can take the liquid refrigerant out of the condenser for lubrication, and the liquid refrigerant is beneficial to keeping the pressure of the liquid refrigerant stable during lubrication.
In some embodiments, the heat exchanger 1 is a plate heat exchanger. This arrangement helps to improve the cooling effect.
In some embodiments, as shown in fig. 1, the cooling flow path comprises a cooling flow path throttling device 2 arranged between a first end thereof and an inlet of the second heat exchanging channel. After a refrigerant is introduced from the main refrigerant loop, the cooling flow path is subjected to pressure reduction and temperature reduction through the throttling action of the cooling flow path throttling device 2, so that the cooling effect is improved and the lubricating effect of the lubricating flow path is ensured when the liquid refrigerant of the lubricating flow path is cooled.
In some embodiments, the cooling flow path throttling device 2 comprises an orifice plate. The cooling flow path throttling device 2 has a simple structure and is convenient to design by arranging the throttling orifice plate with the throttling hole in the cooling flow path, and the refrigerant of the cooling flow path can be adjusted to a proper temperature by replacing the throttling orifice plates with different throttling hole diameters.
In some embodiments, the opening of the throttle of the cooling flow path throttling device 2 is adjustable. The cooling flow path throttling device may be a throttle, an expansion valve, a device with a throttle, or the like. The temperature of the refrigerant of the cooling flow path when the cooling lubricating flow path is cooled can be adjusted by adjusting the opening degree of the throttling opening, so that the cooling effect and the temperature of the liquid refrigerant sent to the bearing chamber of the compressor can be adjusted.
In some embodiments, as shown in fig. 1, the refrigerant circulation system includes a tee joint, a first port of the tee joint is communicated with the main refrigerant loop, a second port of the tee joint is communicated with the first end of the lubrication flow path, and a third port of the tee joint is communicated with the first end of the cooling flow path. The arrangement enables the lubricating flow path and the cooling flow path to share one liquid taking port communicated with the main refrigerant loop when the refrigerant of the main refrigerant loop is introduced, integrates the two introducing pipelines into one introducing pipeline, simplifies a pipeline system and reduces the pressure loss of the pipeline.
In some embodiments, the refrigerant circulation system includes a hydraulic pump disposed between the first port of the tee joint and the main refrigerant circuit for delivering liquid refrigerant from the main refrigerant circuit to the first port. After the refrigerant in the main refrigerant loop is introduced, the refrigerant is pressurized by the hydraulic pump and then is respectively sent to the lubricating flow path and the cooling flow path through the tee joint, which is beneficial to improving the fluidity of the cooling flow path and the lubricating flow path and is also beneficial to improving the liquid stability of the liquid refrigerant sent to the bearing chamber of the compressor.
The invention is illustrated below in a specific embodiment.
In the present embodiment, as shown in fig. 1, the main refrigerant circuit of the refrigerant cycle system includes a compressor, a condenser, an expansion valve, and an evaporator for a refrigeration cycle. The refrigerant circulating system comprises a heat exchanger 1, and the heat exchanger 1 is a plate heat exchanger. The heat exchanger 1 has a first heat exchange channel and a second heat exchange channel. The first heat exchange channel is located between the first inlet 12 and the first outlet 14 of the heat exchanger 1 and the second heat exchange channel is located between the second inlet 11 and the second outlet 13 of the heat exchanger 1. The lubrication flow path includes a first flow path a2 upstream of the first heat exchange passage and a second flow path a21 downstream of the first heat exchange passage. The cooling flow path includes a third flow path A1 upstream of the second heat exchange path and a fourth flow path A11 downstream of the second heat exchange path. Liquid refrigerant is led out from a liquid taking port of a condenser of the main refrigerant circuit, flows into a main circuit flow path A, is pressurized by a hydraulic pump, is respectively sent to a first flow path A2 of a lubrication flow path through a first end of the lubrication flow path through a tee joint for lubrication and is sent to a third flow path A1 of a cooling flow path through a first end of the cooling flow path for cooling the lubrication flow path. The liquid refrigerant in the cooling flow path is throttled by the cooling flow path throttling device 2 in the third flow path a1, and then the pressure and the temperature are reduced, and the liquid refrigerant flows into the second heat exchange passage through the second inlet 11. The liquid refrigerant in the lubrication flow path flows into the first heat exchange channel through the first inlet 12 through the first flow path a 2. The liquid refrigerant in the second heat exchange channel in the heat exchanger 1 cools the liquid refrigerant in the first heat exchange channel. The liquid refrigerant in the lubricating flow path is cooled and then flows out from the second flow path A21 through the first outlet 14, passes through the second end of the lubricating flow path and is sent into the bearing chamber of the compressor to lubricate the bearing. After heat exchange of the liquid refrigerant in the cooling flow path is completed, the liquid refrigerant flows out of the fourth flow path a11 through the second outlet 13, and then returns to the main refrigerant circuit from the second end of the cooling flow path to participate in the refrigeration cycle of the main refrigerant circuit.
The invention discloses a refrigerating device in a second aspect, which comprises the refrigerant circulating system. The refrigerating device has the corresponding advantages of the refrigerant circulating system.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the embodiments of the invention or equivalent replacements of parts of technical features may be made, all of which shall be covered by the scope of the claimed technical solution.

Claims (10)

1. A refrigerant circulation system, comprising:
the main refrigerant loop comprises a compressor for driving a refrigerant to circulate in the main refrigerant loop;
a lubricating flow path, a first end of which is communicated with the main refrigerant loop to lead out liquid refrigerant in the main refrigerant loop, and a second end of which is connected with a bearing chamber of the compressor to lead in the liquid refrigerant to the bearing chamber for lubricating a bearing of the compressor;
a cooling flow path, wherein a first end and a second end of the cooling flow path are respectively communicated with two positions of the main refrigerant loop so as to lead out the refrigerant of the main refrigerant loop to cool the liquid refrigerant of the lubricating flow path;
the heat exchanger is used for exchanging heat between the cooling flow path and the lubricating flow path and comprises a first heat exchange channel and a second heat exchange channel, the first heat exchange channel is connected in series with the lubricating flow path, and the second heat exchange channel is connected in series with the cooling flow path.
2. The refrigerant circulation system as claimed in claim 1, wherein the refrigerant drawn from the cooling flow path is a liquid refrigerant.
3. The refrigerant circulation system as claimed in claim 2,
the first end of the lubricating flow path is communicated with a condenser of the main refrigerant loop; and/or the presence of a gas in the gas,
and the first end of the cooling flow path is communicated with a condenser of the main refrigerant loop.
4. Refrigerant circulation system according to claim 1, characterized in that the heat exchanger (1) is a plate heat exchanger.
5. The refrigerant circulation system as claimed in claim 1, wherein the cooling flow path comprises a cooling flow path throttling device (2) disposed between the first end thereof and the inlet of the second heat exchanging channel.
6. The coolant circulation system as claimed in claim 5, characterized in that the cooling flow path throttling means (2) comprises an orifice plate.
7. The refrigerant cycle system as set forth in claim 5, wherein the opening of the orifice of the cooling flow path throttling means (2) is adjustable.
8. The refrigerant cycle system of claim 5, comprising a tee joint, a first port of the tee joint being in communication with the main refrigerant circuit, a second port of the tee joint being in communication with the first end of the lubrication flow path, and a third port of the tee joint being in communication with the first end of the cooling flow path.
9. The refrigerant cycle system as claimed in claim 5, wherein the refrigerant cycle system comprises a hydraulic pump (3) disposed between the first port of the tee and the main refrigerant circuit for delivering liquid refrigerant from the main refrigerant circuit to the first port.
10. A refrigeration apparatus comprising the refrigerant circulation system as claimed in any one of claims 1 to 9.
CN201811599329.9A 2018-12-26 2018-12-26 Refrigerant circulation system and refrigerating device Pending CN111365907A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811599329.9A CN111365907A (en) 2018-12-26 2018-12-26 Refrigerant circulation system and refrigerating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811599329.9A CN111365907A (en) 2018-12-26 2018-12-26 Refrigerant circulation system and refrigerating device

Publications (1)

Publication Number Publication Date
CN111365907A true CN111365907A (en) 2020-07-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811599329.9A Pending CN111365907A (en) 2018-12-26 2018-12-26 Refrigerant circulation system and refrigerating device

Country Status (1)

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CN (1) CN111365907A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113587506A (en) * 2021-07-26 2021-11-02 珠海格力电器股份有限公司 Refrigerant return-air system and refrigerating unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113587506A (en) * 2021-07-26 2021-11-02 珠海格力电器股份有限公司 Refrigerant return-air system and refrigerating unit
CN113587506B (en) * 2021-07-26 2022-06-14 珠海格力电器股份有限公司 Refrigerant return-air system and refrigerating unit

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