CN215062954U - Centrifugal refrigeration system heat compressor operating mode switched systems - Google Patents
Centrifugal refrigeration system heat compressor operating mode switched systems Download PDFInfo
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- CN215062954U CN215062954U CN202120840130.1U CN202120840130U CN215062954U CN 215062954 U CN215062954 U CN 215062954U CN 202120840130 U CN202120840130 U CN 202120840130U CN 215062954 U CN215062954 U CN 215062954U
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 27
- 230000006835 compression Effects 0.000 claims abstract description 64
- 238000007906 compression Methods 0.000 claims abstract description 64
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 239000013589 supplement Substances 0.000 claims description 45
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 230000001502 supplementing effect Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
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- 238000010276 construction Methods 0.000 description 1
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Abstract
The application discloses centrifugal refrigeration system hot compressor operating mode switched systems includes: a main side compression stage, an auxiliary side compression stage, a condenser, a flash evaporator and an evaporator; the air suction end of the main side compression stage is connected with the evaporator, the air exhaust end of the main side compression stage is connected with the condenser through the main air exhaust pipe, and the condenser, the flash evaporator and the evaporator are sequentially connected; the air suction end of the auxiliary side compression stage is connected with the evaporator through an auxiliary air suction pipe, and the air exhaust end of the auxiliary side compression stage is connected with the main exhaust pipe through an auxiliary exhaust pipe; the main exhaust pipe is provided with a main side exhaust valve, the auxiliary air suction pipe is provided with an auxiliary side air suction valve, the main exhaust pipe and the auxiliary air suction pipe are connected through an interstage pipeline, and the interstage pipeline is provided with an interstage pipe valve; the junction of the auxiliary exhaust pipe and the main exhaust pipe is positioned at the outlet end of the main side exhaust valve, and the junction of the interstage pipeline and the main exhaust pipe is positioned at the inlet end of the main side exhaust valve. The method and the device solve the problem that the compressor is difficult to meet the working condition requirements of refrigeration and heating due to the large variation range of refrigeration and heating working conditions in the related technology.
Description
Technical Field
The application relates to the technical field of compressors, in particular to a working condition switching system of a centrifugal refrigerating and heating compressor.
Background
For a centrifugal compressor which can both heat and refrigerate, the difference between the refrigeration working condition and the heating working condition is large, the whole operation range of the compressor is wide, the compressor has two difficulties, one is that the pressure ratio and the flow range of the compressor are large, and the other is that the compressor operates in high efficiency in the whole operation range. Particularly, for the multi-split air-conditioning system, the pressure ratio of the cooling working condition is about 3, but the pressure ratio of the heating working condition is about 10, so the working condition variation range of the cooling and heating compressor is large, and the compressor in the related art is difficult to meet the working condition requirement.
Aiming at the problem that the compressor in the related art is difficult to meet the working condition requirements of refrigeration and heating due to the large variation range of refrigeration and heating working conditions, an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
The main purpose of this application is to provide a centrifugal refrigeration heating compressor operating mode switched systems to solve the problem that the compressor is big because of refrigeration heating operating condition variation range among the correlation technique, and is difficult to satisfy the operating mode demand of refrigeration and heating.
In order to realize the above-mentioned purpose, this application provides a centrifugal refrigeration system hot compressor operating mode switched systems, this centrifugal refrigeration system hot compressor operating mode switched systems includes: a main side compression stage, an auxiliary side compression stage, a condenser, a flash evaporator and an evaporator; the air suction end of the main side compression stage is connected with the evaporator, the air exhaust end of the main side compression stage is connected with the condenser through a main air exhaust pipe, and the condenser, the flash evaporator and the evaporator are sequentially connected; the air suction end of the auxiliary side compression stage is connected with the evaporator through an auxiliary air suction pipe, and the air exhaust end of the auxiliary side compression stage is connected with the main exhaust pipe through an auxiliary exhaust pipe; the main exhaust pipe is provided with a main side exhaust valve, the auxiliary air suction pipe is provided with an auxiliary side air suction valve, the main exhaust pipe is connected with the auxiliary air suction pipe through an interstage pipeline, and the interstage pipeline is provided with an interstage pipe valve; the connection position of the auxiliary exhaust pipe and the main exhaust pipe is positioned at the outlet end of the main side exhaust valve, and the connection position of the interstage pipeline and the main exhaust pipe is positioned at the inlet end of the main side exhaust valve; the connection position of the interstage pipeline and the auxiliary air suction pipe is positioned at the outlet end of the auxiliary side air suction valve.
Furthermore, the flash evaporator further comprises a first air supplement pipeline, a first air supplement valve is arranged on the first air supplement pipeline, the first end of the first air supplement pipeline is connected with the flash evaporator, the second end of the first air supplement pipeline is connected with the auxiliary air suction pipe, and the joint of the second end of the first air supplement pipeline and the auxiliary air suction pipe is located at the outlet end of the auxiliary side air suction valve.
Further, the system also comprises a second-stage throttle valve connected between the flash evaporator and the evaporator and a first-stage throttle valve connected between the flash evaporator and the condenser.
Further, the number of impellers in the main-side compression stage and the auxiliary-side compression stage is equal.
Furthermore, the number of the impellers of the main side compression stage and the auxiliary side compression stage is two.
And the first end of the second air supplement pipeline is connected with the flash evaporator, the second end of the second air supplement pipeline is connected between the two impellers of the auxiliary side compression stage, and a second air supplement valve is arranged on the second air supplement pipeline.
Further, still include the third air supplement pipeline, the first end of third air supplement pipeline with the flash tank is connected, the second end connect in between two impellers of main side compression stage, be provided with the third gulp valve on the third air supplement pipeline.
In the embodiment of the application, the main side compression stage, the auxiliary side compression stage, the condenser, the flash evaporator and the evaporator are arranged; the air suction end of the main side compression stage is connected with the evaporator, the air exhaust end of the main side compression stage is connected with the condenser through the main air exhaust pipe, and the condenser, the flash evaporator and the evaporator are sequentially connected; the air suction end of the auxiliary side compression stage is connected with the evaporator through an auxiliary air suction pipe, and the air exhaust end of the auxiliary side compression stage is connected with the main exhaust pipe through an auxiliary exhaust pipe; the main exhaust pipe is provided with a main side exhaust valve, the auxiliary air suction pipe is provided with an auxiliary side air suction valve, the main exhaust pipe and the auxiliary air suction pipe are connected through an interstage pipeline, and the interstage pipeline is provided with an interstage pipe valve; the connection position of the auxiliary exhaust pipe and the main exhaust pipe is positioned at the outlet end of the main side exhaust valve, and the connection position of the interstage pipeline and the main exhaust pipe is positioned at the inlet end of the main side exhaust valve; the connection part of the interstage pipeline and the auxiliary air suction pipe is positioned at the outlet end of the auxiliary side air suction valve.
When the refrigeration working condition or the low pressure ratio working condition is adopted, the main side exhaust valve and the auxiliary side suction valve are opened, the interstage valve is closed, and the main side compression stage and the auxiliary side compression stage are operated in parallel; when the heating working condition or the high-pressure ratio working condition is met, the main side exhaust valve and the auxiliary side suction valve are closed, the interstage valve is opened, and the main side compression stage and the auxiliary side compression stage are connected in series to operate, so that the compressor can be switched between series connection and parallel connection according to the working condition requirement, the technical effect that the compressor can meet the working condition requirement of refrigeration and heating is achieved, and the problem that the compressor is difficult to meet the working condition requirement of refrigeration and heating due to the fact that the compressor is large in refrigerating and heating working condition change range in the related technology is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a schematic structural diagram according to an embodiment of the present application;
the system comprises a condenser 1, an auxiliary exhaust pipe 2, an auxiliary side compression stage 3, an auxiliary air suction pipe 4, a second air supplement valve 5, a first-stage throttling valve 6, a second air supplement pipeline 7, a first air supplement valve 8, a flash evaporator 9, a first air supplement pipeline 10, a third air supplement pipeline 11, a third air supplement valve 12, a second-stage throttling valve 13, an auxiliary side air suction valve 14, a 15-stage pipe valve, a 16 evaporator, a 17-stage pipeline, a 18 main side compression stage, a 19 main exhaust pipe and a 20 main side exhaust valve.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. 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 application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used.
In this application, the terms "upper", "lower", "inside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "disposed," "provided," "connected," "secured," and the like are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, the present application provides a centrifugal refrigeration and heating compressor working condition switching system, and this centrifugal refrigeration and heating compressor working condition switching system includes: a primary side compression stage 18, a secondary side compression stage 3, a condenser 1, a flash tank 9 and an evaporator 16; wherein, the suction end of the main side compression stage 18 is connected with the evaporator 16, the exhaust end is connected with the condenser 1 through the main exhaust pipe 19, and the condenser 1, the flash evaporator 9 and the evaporator 16 are connected in sequence; the air suction end of the auxiliary side compression stage 3 is connected with the evaporator 16 through an auxiliary air suction pipe 4, and the air exhaust end is connected with the main exhaust pipe 19 through an auxiliary exhaust pipe 2; the main exhaust pipe 19 is provided with a main side exhaust valve 20, the auxiliary air suction pipe 4 is provided with an auxiliary side air suction valve 14, the main exhaust pipe 19 and the auxiliary air suction pipe 4 are connected through an interstage pipeline 17, and the interstage pipeline 17 is provided with an interstage pipe valve 15; the junction of the auxiliary exhaust pipe 2 and the main exhaust pipe 19 is located at the outlet end of the main side exhaust valve 20, and the junction of the interstage piping 17 and the main exhaust pipe 19 is located at the inlet end of the main side exhaust valve 20; the connection between the interstage piping 17 and the auxiliary suction pipe 4 is located at the outlet end of the auxiliary side suction valve 14.
In this embodiment, the system further comprises a secondary throttle valve 13 connected between the flash tank 9 and the evaporator 16 and a primary throttle valve 6 connected between the flash tank 9 and the condenser 1. The primary side compression stage 18, condenser 1, flash tank 9 and evaporator 16 form a closed loop, and the secondary side compression stage 3, condenser 1, flash tank 9 and evaporator 16 form another closed loop. When the compressor is in a refrigeration working condition or a low pressure ratio working condition, the main side exhaust valve 20 and the auxiliary side suction valve 14 are opened, the interstage valve 15 is closed, and the main side compression stage 18 and the auxiliary side compression stage 3 run in parallel; when the compressor is in a heating working condition or a high-pressure ratio working condition, the main side exhaust valve 20 and the auxiliary side air suction valve 14 are closed, the interstage valve 15 is opened, and the main side compression stage 18 and the auxiliary side compression stage 3 are connected in series for operation, so that the compressor can be switched between series connection and parallel connection according to working condition requirements, the technical effect that the compressor can meet the working condition requirements of refrigeration and heating is achieved, and the problem that the compressor is difficult to meet the working condition requirements of refrigeration and heating due to the fact that the variation range of the refrigeration and heating working conditions is large in the related technology is solved. The operation and working principle of the condenser 1, the flash evaporator 9 and the evaporator 16 in the system belong to the prior art, and are not described in detail herein.
As shown in fig. 1, in order to further improve the energy efficiency of the compressor, the system further includes a first air supplement pipeline 10, a first air supplement valve 8 is disposed on the first air supplement pipeline 10, a first end of the first air supplement pipeline 10 is connected to the flash generator 9, a second end of the first air supplement pipeline is connected to the auxiliary air suction pipe 4, and a joint of the second end and the auxiliary air suction pipe 4 is located at an outlet end of the auxiliary air suction valve 14.
When the compressor is in a refrigeration working condition or a low-pressure ratio working condition, the first air compensating valve 8 is also synchronously closed, and when the compressor is in a heating working condition or a high-pressure ratio working condition, the first air compensating valve 8 is synchronously opened, so that the output end of the first air compensating pipeline 10 is positioned between the main side compression stage 18 and the auxiliary side compression stage 3 which are connected in series, interstage air compensation is realized, and the energy efficiency of the compressor is improved.
The number of the impellers of the main side compression stage 18 and the auxiliary side compression stage 3 is equal, the number of the impellers is one or two as shown in fig. 1, when the number of the impellers of the main side compression stage 18 and the number of the impellers of the auxiliary side compression stage 3 are two, in order to improve the energy efficiency of the parallel connection of the compressors, the system further comprises a second air supplementing pipeline 7, the first end of the second air supplementing pipeline 7 is connected with the flash generator 9, the second end of the second air supplementing pipeline is connected between the two impellers of the auxiliary side compression stage 3, and a second air supplementing valve 5 is arranged on the second air supplementing pipeline 7. When the air is connected in parallel, the second air replenishing valve 5 is opened to replenish air to the auxiliary side compression stage 3, so that the energy efficiency is improved. In the same way, the flash evaporator further comprises a third air supplement pipeline 11, the first end of the third air supplement pipeline 11 is connected with the flash evaporator 9, the second end of the third air supplement pipeline is connected between the two impellers of the main side compression stage 18, and a third air supplement valve 12 is arranged on the third air supplement pipeline 11. When the air is connected in parallel, the third air compensating valve 12 is also opened to compensate air for the main side compression stage 18, and the energy efficiency of the main side compression stage 18 is improved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. The utility model provides a centrifugal refrigeration system heat compressor operating mode switched systems which characterized in that includes: a main side compression stage, an auxiliary side compression stage, a condenser, a flash evaporator and an evaporator; wherein,
the suction end of the main side compression stage is connected with the evaporator, the exhaust end of the main side compression stage is connected with the condenser through a main exhaust pipe, and the condenser, the flash evaporator and the evaporator are sequentially connected;
the air suction end of the auxiliary side compression stage is connected with the evaporator through an auxiliary air suction pipe, and the air exhaust end of the auxiliary side compression stage is connected with the main exhaust pipe through an auxiliary exhaust pipe;
the main exhaust pipe is provided with a main side exhaust valve, the auxiliary air suction pipe is provided with an auxiliary side air suction valve, the main exhaust pipe is connected with the auxiliary air suction pipe through an interstage pipeline, and the interstage pipeline is provided with an interstage pipe valve;
the connection position of the auxiliary exhaust pipe and the main exhaust pipe is positioned at the outlet end of the main side exhaust valve, and the connection position of the interstage pipeline and the main exhaust pipe is positioned at the inlet end of the main side exhaust valve; the connection position of the interstage pipeline and the auxiliary air suction pipe is positioned at the outlet end of the auxiliary side air suction valve.
2. The system for switching operating conditions of a centrifugal refrigeration and thermal compression machine according to claim 1, further comprising a first air supplement pipeline, wherein a first air supplement valve is disposed on the first air supplement pipeline, a first end of the first air supplement pipeline is connected to the flash generator, a second end of the first air supplement pipeline is connected to the auxiliary air suction pipe, and a joint of the second end of the first air supplement pipeline and the auxiliary air suction pipe is located at an outlet end of the auxiliary side air suction valve.
3. The system as claimed in claim 2, further comprising a second stage throttle valve connected between the flash tank and the evaporator and a first stage throttle valve connected between the flash tank and the condenser.
4. The centrifugal refrigerating and heating compressor condition switching system according to any one of claims 1 to 3, wherein the number of impellers of the primary side compression stage and the secondary side compression stage is equal.
5. The centrifugal refrigerating and heating compressor condition switching system according to claim 4, wherein the number of the impellers of the primary side compression stage and the secondary side compression stage is two.
6. The centrifugal refrigeration and heating compressor working condition switching system according to claim 5, further comprising a second air supplement pipeline, wherein a first end of the second air supplement pipeline is connected with the flash evaporator, a second end of the second air supplement pipeline is connected between the two impellers of the auxiliary side compression stage, and a second air supplement valve is arranged on the second air supplement pipeline.
7. The system for switching the working conditions of the centrifugal refrigeration and heating compressor according to claim 6, further comprising a third air supplement pipeline, wherein a first end of the third air supplement pipeline is connected with the flash evaporator, a second end of the third air supplement pipeline is connected between the two impellers of the main side compression stage, and a third air supplement valve is arranged on the third air supplement pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120840130.1U CN215062954U (en) | 2021-04-22 | 2021-04-22 | Centrifugal refrigeration system heat compressor operating mode switched systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120840130.1U CN215062954U (en) | 2021-04-22 | 2021-04-22 | Centrifugal refrigeration system heat compressor operating mode switched systems |
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| CN215062954U true CN215062954U (en) | 2021-12-07 |
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| CN202120840130.1U Active CN215062954U (en) | 2021-04-22 | 2021-04-22 | Centrifugal refrigeration system heat compressor operating mode switched systems |
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