CN108518895B - Variable flow evaporator with throttling function and refrigerating system - Google Patents
Variable flow evaporator with throttling function and refrigerating system Download PDFInfo
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- CN108518895B CN108518895B CN201810436480.4A CN201810436480A CN108518895B CN 108518895 B CN108518895 B CN 108518895B CN 201810436480 A CN201810436480 A CN 201810436480A CN 108518895 B CN108518895 B CN 108518895B
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- pipe
- evaporator
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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
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
- F25B39/028—Evaporators having distributing means
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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
- F25B1/005—Compression machines, plants or systems with non-reversible cycle of the single unit 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
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/02—Details of evaporators
- F25B2339/021—Evaporators in which refrigerant is sprayed on a surface to be cooled
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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
- F25B2500/00—Problems to be solved
- F25B2500/09—Improving heat transfers
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a variable flow evaporator with a throttling function and a refrigerating system. The variable flow evaporator comprises an outer layer heat exchange sleeve and an inner layer injection pipe; one end of the inner-layer injection pipe is closed, the other end of the inner-layer injection pipe is provided with an opening for receiving refrigerant liquid discharged by the liquid distributor, and a plurality of injection holes are distributed on the surface of the inner-layer injection pipe and used for throttling condensed high-temperature and high-pressure liquid refrigerant flowing out of the liquid distributor into low-temperature and low-pressure liquid refrigerant and injecting the low-temperature and low-pressure liquid refrigerant to the integral inner surface of the outer-layer heat exchange pipe to form a; the outer surface of the inner layer injection pipe is sleeved with a rotatable flow regulating sleeve, and rectangular gaps with preset lengths corresponding to the injection holes are distributed on the pipe wall of the flow regulating sleeve; one end of the outer heat exchange sleeve close to the liquid distributor is sealed and penetrates through the opening end of the inner injection pipe, and a gas collecting pipe is formed at the other end of the outer heat exchange sleeve and used for outputting the refrigerant to the compressor. The invention can save the conventional throttling device of the refrigerating system, simplify the system, reduce the cost and improve the operation efficiency of the system.
Description
Technical Field
The invention relates to the technical field of refrigeration and air conditioning, in particular to a variable flow evaporator with a throttling function and a refrigeration system.
Background
In the refrigeration field, a typical refrigeration system consists essentially of a compressor, a condenser, a throttling element, and an evaporator. The evaporator is a core part, is positioned between the throttle valve and the return air manifold of the compressor or between the liquid supply pipe and the return air pipe of the vapor-liquid separation equipment, and is arranged in a space needing cooling and freezing. At present, heat exchange equipment in a refrigeration system is mainly a dividing wall type heat exchanger, such as a double-pipe heat exchanger, a shell-and-tube heat exchanger, a plate-fin heat exchanger, a plate-shell heat exchanger and the like. The double-pipe heat exchanger has the advantages of simple structure, high heat exchange efficiency, capability of changing the form randomly according to the installation position and the like, but is troublesome to disassemble, overhaul and clean. The shell-and-tube heat exchanger has a strong structure, a large heat exchange amount, and easy manufacture, but has disadvantages in terms of heat transfer efficiency, compactness, and metal consumption. The plate heat exchanger has the characteristics of high heat exchange efficiency, compact and light structure and the like, but has higher cost and is easy to block. The plate-fin heat exchanger has high heat transfer efficiency, compactness and lightness, but has strict manufacturing process requirement, easy blockage and difficult cleaning and maintenance. The plate-shell type heat exchanger has the advantages of both the plate-shell type heat exchanger and the shell type heat exchanger, but the manufacturing process is complex, the welding amount is large and the requirement is high. For a refrigeration system, an evaporator meets the conventional requirements of a heat exchanger, and the heat exchange temperature difference and the refrigerant filling amount are reduced as much as possible so as to improve the operation efficiency of the system.
Disclosure of Invention
The invention aims to provide a variable-flow evaporator with a throttling function and a refrigerating system, which have adjustable refrigerant flow, aiming at the technical defects in the prior art.
The technical scheme adopted for realizing the purpose of the invention is as follows:
a variable flow evaporator with a throttling function comprises an outer-layer heat exchange sleeve and an inner-layer injection pipe, wherein one end of the inner-layer injection pipe is closed, an opening is formed in the other end of the inner-layer injection pipe and used for receiving refrigerant liquid discharged by a liquid distributor, a plurality of injection holes are distributed in the surface of the inner-layer injection pipe and used for throttling condensed high-temperature and high-pressure liquid refrigerant flowing out of the liquid distributor into low-temperature and low-pressure liquid refrigerant, and the low-temperature and low-pressure liquid refrigerant is injected to the integral inner surface of an outer-layer heat exchange pipe to form a; a rotatable flow regulating sleeve is tightly sleeved on the outer surface of the inner layer injection pipe, and rectangular gaps with preset lengths corresponding to the injection holes are distributed on the pipe wall of the flow regulating sleeve; one end of the outer layer heat exchange sleeve close to the liquid distributor is sealed and penetrates through the opening end of the inner layer injection pipe, and the other end of the outer layer heat exchange sleeve is provided with a gas collecting pipe used for outputting refrigerant gas to the compressor.
One end of the flow regulating sleeve is open, the other end of the flow regulating sleeve is closed, and the closed end of the flow regulating sleeve is connected with the stepping motor.
The hole diameters of the injection holes are the same.
The invention also aims to provide a refrigerating system which comprises a compressor, evaporators, a condenser, a liquid distributor and a liquid storage tank, and is characterized in that the compressor is connected with the condenser, the condenser is connected with the liquid storage tank, the liquid storage tank is connected with the liquid distributor, and the liquid distributor is connected with a plurality of evaporators arranged in parallel; the evaporator is connected with the compressor, wherein the evaporator adopts the variable flow evaporator with the throttling function.
And a fan is arranged on the outer side of the evaporator.
The invention adopts the jet holes arranged on the inner layer jet pipe to play a throttling role, and adopts a jet impact mode to improve the heat exchange efficiency of the evaporator, thereby bringing the following beneficial effects:
(1) the condensed refrigerant is throttled into a low-temperature and low-pressure liquid refrigerant through the jet hole of the inner layer jet pipe, so that a conventional throttling device of a refrigeration system can be omitted, the cost is reduced, and the system is simplified.
(2) The flow regulating sleeve is driven to rotate by setting the step number of the stepping motor, the number of the jet holes capable of effectively spraying liquid is changed, the flow of the refrigerant can be changed within a certain range, the cold quantity of the refrigerating system can be regulated as required, and the running efficiency of the system is improved;
(3) after the refrigerant is sprayed to the inner surface of the outer heat exchange sleeve through the spray holes, a layer of film heat exchange can be formed, so that the heat exchange area is fully utilized, the heat exchange coefficient is improved, and the filling amount of the refrigerant of the system can be reduced.
Drawings
FIG. 1 is a schematic diagram of a refrigerant system employing a variable flow evaporator with throttling capability;
fig. 2 is a schematic structural diagram of a variable flow rate evaporator with a throttling function.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 2, a variable flow rate evaporator 6 having a throttling function includes:
the heat exchanger comprises an outer-layer heat exchange sleeve 9 and an inner-layer injection pipe 12, wherein one end 14 of the inner-layer injection pipe 12 is closed, the other end of the inner-layer injection pipe 12 is provided with an opening for being connected with a liquid distributor 5, and a plurality of injection holes 13 are distributed on the surface of the inner-layer injection pipe 12; a rotatable flow regulating sleeve 10 is tightly sleeved on the outer surface of the inner layer injection pipe 12, a rectangular strip gap 11 with a preset length corresponding to an injection hole 13 is distributed on the pipe wall of the flow regulating sleeve 10, one end of the flow regulating sleeve 10 is closed, and the other end of the flow regulating sleeve 10 is opened to be sleeved on the inner layer injection pipe 12; the outer heat exchange sleeve 9 is close to one end 8 of the liquid distributor 5 and is sealed by an annular seal plate, the open end of the inner injection pipe 12 penetrates through the annular seal plate and then is connected with the liquid distributor 5, the other end of the inner injection pipe is provided with a gas collecting pipe 15 and is used as an output end of refrigerant gas and output to a return port of a compressor of a refrigerating system, the outer wall surface of the open end of the inner injection pipe 12 is hermetically welded with the inner side surface of the annular seal plate, and the open end of the flow adjusting sleeve 10 is in contact with the inner side surface of the annular seal plate.
The invention adopts the jet hole on the inner layer jet pipe to play a throttling role, replaces a throttling device in the traditional refrigerating system and simplifies the refrigerating system; the heat exchange efficiency of the evaporator is improved by adopting a jet impact mode, so that the overall operation efficiency of the refrigerating system is improved by improving the required evaporation temperature.
The aperture and the arrangement mode of the injection holes are specifically set according to the pipe diameter of the variable flow evaporator, and the injection holes are arranged on the inner-layer injection pipe at intervals as shown in fig. 2 on the principle that the injected refrigerant can be uniformly formed on the whole surface of the inner wall of the outer-layer heat exchange sleeve pipe to form a layer of liquid film-shaped refrigerant.
Wherein the outer heat exchange sleeve 9 is concentric with the inner injection pipe 12 and the flow regulating sleeve 10.
The diameter of the outer layer heat exchange sleeve 9 is about 3-5 times, preferably 4 times that of the inner layer injection pipe 12.
The invention also aims to provide a refrigerating system of the variable flow evaporator with the throttling function, which comprises a compressor 1, a liquid distributor 5, wherein an exhaust pipe of the compressor 1 is connected with a condenser 3, a liquid discharge pipe of the condenser 3 is connected with a liquid storage tank 4, a liquid discharge port of the liquid storage tank is connected with the liquid distributor 5, the liquid discharge port of the liquid distributor 5 is connected with an opening of an inner-layer injection pipe 12 of the variable flow evaporator 6 with the throttling function, and a fan 7 is arranged on the outer side of the variable flow evaporator 6 with the throttling function.
The working principle of the invention is as follows: the condensed high-temperature high-pressure liquid refrigerant enters a liquid separator and is uniformly distributed to inner layer injection pipes of each variable flow evaporator, then the condensed high-temperature high-pressure liquid refrigerant is sprayed out through injection holes distributed on the surface of the inner layer injection pipe and throttled into low-temperature low-pressure liquid refrigerant, the obtained low-temperature low-pressure liquid refrigerant is jetted to the inner surface of the outer layer heat exchange sleeve to absorb heat and evaporate into gas state, and the gas refrigerant is discharged along a circular cavity between the flow regulating sleeve and the outer layer heat exchange sleeve and is converged to a gas collecting pipe at the other end and output to a gas return port of the compressor.
The end 14 of the flow control sleeve 10 near the closed end of the inner injection tube 12 may be connected, e.g., welded, to an output shaft of a stepper motor 16, and rotated by the stepper motor 16. The stepping motor 16 is arranged outside the variable flow evaporator, and the output shaft penetrates through the outer heat exchange tube of the variable flow evaporator in a sealing manner to be connected and fixed with the sealing end of the flow adjusting sleeve 10. The flow adjusting sleeve is driven to rotate by setting the step number of the stepping motor, the number of the spraying holes capable of spraying liquid can be changed, and therefore the flow of the refrigerant is changed, and then the refrigerating capacity adjustment of the refrigerating system is achieved.
It should be noted that, in the present invention, three modes of operation, i.e., one-third flow rate, two-thirds flow rate and full flow rate, can be realized according to the relative positions of the rectangular slit 11 on the flow rate adjusting sleeve 10 and the injection hole 13 on the inner injection pipe 12.
One third flow pattern: the number of steps of the stepping motor 16 is set to rotate the flow rate adjusting sleeve 10 by a proper angle, so that only one third of small holes on the surface of the inner layer injection pipe are exposed through the rectangular gaps on the surface of the adjusting sleeve 10. The condensed high-temperature high-pressure liquid refrigerant enters the liquid separator 5 and is uniformly distributed to each path of inner-layer injection pipe 12, then the condensed high-temperature high-pressure liquid refrigerant is sprayed out through each spray hole 13 distributed on the surface of the inner-layer injection pipe 12 and throttled into low-temperature low-pressure liquid refrigerant, the obtained low-temperature low-pressure liquid refrigerant is jetted to the inner surface of the outer-layer heat exchange sleeve 9 to absorb heat and evaporate into gas, and the gas refrigerant is converged to the gas collecting pipe 15 at the other end along a circular cavity between the flow regulating sleeve 10 and the outer-layer.
Two-thirds flow mode: the number of steps of the stepping motor 16 is set to rotate the flow rate adjusting sleeve 10 by a proper angle, so that two thirds of small holes on the surface of the inner layer injection pipe are exposed through the rectangular gaps on the surface of the adjusting sleeve 10. The condensed high-temperature high-pressure liquid refrigerant enters the liquid separator 5 and is uniformly distributed to each path of inner-layer injection pipe 12, then the condensed high-temperature high-pressure liquid refrigerant is sprayed out through each spray hole 13 distributed on the surface of the inner-layer injection pipe 12 and throttled into low-temperature low-pressure liquid refrigerant, the obtained low-temperature low-pressure liquid refrigerant is jetted to the inner surface of the outer-layer heat exchange sleeve 9 to absorb heat and evaporate into gas, and the gas refrigerant is converged to the gas collecting pipe 15 at the other end along a circular cavity between the flow regulating sleeve 10 and the outer-.
Full flow mode: the number of steps of the stepping motor 16 is set to rotate the flow rate adjusting sleeve 10 by a proper angle, so that all small holes on the surface of the inner layer injection pipe are exposed through the rectangular gaps on the surface of the adjusting sleeve 10. The condensed high-temperature high-pressure liquid refrigerant enters the liquid separator 5 and is uniformly distributed to each path of inner-layer injection pipe 12, then the condensed high-temperature high-pressure liquid refrigerant is sprayed out through each spray hole 13 distributed on the surface of the inner-layer injection pipe 12 and throttled into low-temperature low-pressure liquid refrigerant, the obtained low-temperature low-pressure liquid refrigerant is jetted to the inner surface of the outer-layer heat exchange sleeve 9 to absorb heat and evaporate into gas, and the gas refrigerant is converged to the gas collecting pipe 15 at the other end along a circular cavity between the flow regulating sleeve 10 and the outer-.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A variable flow evaporator with a throttling function is characterized by comprising an outer-layer heat exchange sleeve and an inner-layer injection pipe, wherein one end of the inner-layer injection pipe is closed, an opening is formed in the other end of the inner-layer injection pipe and used for receiving refrigerant liquid discharged by a liquid distributor, and a plurality of injection holes are distributed in the surface of the inner-layer injection pipe and used for throttling condensed high-temperature and high-pressure refrigerant flowing out of the liquid distributor into low-temperature and low-pressure liquid refrigerant and injecting the low-temperature and low-pressure liquid refrigerant to the integral inner surface of the outer-layer heat exchange sleeve to form a layer of; a rotatable flow regulating sleeve is tightly sleeved on the outer surface of the inner layer injection pipe, and rectangular gaps with preset lengths corresponding to the injection holes are distributed on the pipe wall of the flow regulating sleeve; one end of the outer-layer heat exchange sleeve close to the liquid distributor is sealed and penetrates through the opening end of the inner-layer injection pipe, and the other end of the outer-layer heat exchange sleeve is provided with a gas collecting pipe used for outputting refrigerant gas to the compressor; the outer layer heat exchange sleeve is concentric with the inner layer jet pipe and the flow regulating sleeve.
2. The variable flow rate evaporator with a throttling function according to claim 1, wherein one end of the flow regulating sleeve is open, the other end is closed, and the closed end is connected with a stepping motor.
3. A variable flow rate evaporator with a throttling function according to claim 1, wherein the aperture of said ejection holes is the same.
4. A refrigeration system is characterized by comprising a compressor, evaporators, a condenser, a liquid distributor and a liquid storage tank, wherein the compressor is connected with the condenser, the condenser is connected with the liquid storage tank, the liquid storage tank is connected with the liquid distributor, and the liquid distributor is connected with a plurality of evaporators arranged in parallel; the evaporator is connected with a compressor, and the evaporator adopts a variable flow evaporator with the throttling function as claimed in any one of claims 1-3.
5. The refrigeration system as recited in claim 4 wherein a fan is disposed outside of said evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810436480.4A CN108518895B (en) | 2018-05-09 | 2018-05-09 | Variable flow evaporator with throttling function and refrigerating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810436480.4A CN108518895B (en) | 2018-05-09 | 2018-05-09 | Variable flow evaporator with throttling function and refrigerating system |
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| Publication Number | Publication Date |
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| CN108518895A CN108518895A (en) | 2018-09-11 |
| CN108518895B true CN108518895B (en) | 2020-06-26 |
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| CN111256394B (en) * | 2020-03-20 | 2024-08-16 | 长虹美菱股份有限公司 | Laminated sleeve type evaporator |
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| CN101008560A (en) * | 2006-01-27 | 2007-08-01 | 深圳麦克维尔空调有限公司 | Fluid distributor and using method thereof |
| CN102226662B (en) * | 2011-06-02 | 2016-01-13 | 江苏宝得换热设备有限公司 | The heat exchanger that flow is adjustable |
| CN208332754U (en) * | 2018-05-09 | 2019-01-04 | 天津商业大学 | A kind of variable-flow evaporator and refrigeration system with throttling function |
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Effective date of registration: 20210218 Address after: Room 603-7, automobile building, No.1 Yunjing Road, automobile industrial park, Wuqing District, Tianjin (centralized office area) Patentee after: Tianjin Derun Tiancheng Technology Co.,Ltd. Address before: 409 Guangrong Road, Beichen District, Tianjin Patentee before: TIANJIN University OF COMMERCE |