CN111457623A - Component for hot gas bypass of refrigeration system - Google Patents
Component for hot gas bypass of refrigeration system Download PDFInfo
- Publication number
- CN111457623A CN111457623A CN202010325784.0A CN202010325784A CN111457623A CN 111457623 A CN111457623 A CN 111457623A CN 202010325784 A CN202010325784 A CN 202010325784A CN 111457623 A CN111457623 A CN 111457623A
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- CN
- China
- Prior art keywords
- proportional control
- control valve
- hot gas
- refrigeration system
- valve
- 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
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/04—Refrigeration circuit bypassing means
- F25B2400/0409—Refrigeration circuit bypassing means for the evaporator
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a component for hot gas bypass of a refrigeration system, which comprises an inlet pipeline and an outlet pipeline, wherein the inlet pipeline and the outlet pipeline are connected with a proportional control valve, the working principle of the component is that the temperature of a control object is monitored through a temperature sensor, a target temperature is set on a valve controller, the proportional control valve controls the opening steps through PID (proportion integration differentiation), so that relatively accurate bypass refrigerant flow is realized, the proportional control valve is also connected with a microcomputer controller, and the microcomputer controller is connected with the temperature sensor. The invention has the beneficial effects that: compared with the traditional start-stop control, the proportional control can realize stable response and transition, the actual control effect temperature fluctuation is small, and the control curve is smooth and stable.
Description
Technical Field
The invention relates to the technical field of refrigeration systems, in particular to an assembly for hot gas bypass of a refrigeration system.
Background
For some refrigeration units with high requirements on temperature control accuracy, such as laser water coolers, water coolers used in the testing industry, etc., in order to achieve an accurate target refrigeration temperature, a hot gas bypass scheme is generally adopted to control the output refrigeration capacity of a compressor. When the actual temperature approaches the target temperature, the compressor must be continuously operated, but the cooling capacity of the compressor is sometimes larger than the actual heating capacity, and the cooling capacity output by the compressor needs to be deloaded and adjusted. The method is characterized in that an exhaust pipe of the compressor is communicated with an inlet of an electromagnetic valve, an outlet of the electromagnetic valve is communicated with an inlet of an air suction pipe or an evaporator, and the amount of the hot air of the bypass is controlled by controlling the on-off of the electromagnetic valve, so that the target temperature is controlled within a target range.
In practical engineering application, the method can realize higher temperature control precision for some small refrigerating units, but the electromagnetic valve frequently acts in the control process, and the service life is adversely affected.
In order to improve the existing scheme, realize more stable temperature precision control and solve the problem that the frequent action of an electromagnetic valve is easy to damage, the invention provides a scheme for controlling bypass flow by adopting a proportional control valve.
Disclosure of Invention
The present invention is directed to an assembly for bypassing hot gas in a refrigeration system to solve the problems set forth in the background above.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an subassembly for refrigerating system hot gas bypass, includes inlet line and outlet line, be connected with proportional control valve between inlet line and the outlet line, its theory of operation is through temperature sensor monitoring control object temperature, sets for the target temperature on valve controller, proportional control valve opens the step number through PID control to realize relatively accurate bypass refrigerant flow, proportional control valve still is connected with microcomputer control ware, and microcomputer control ware is connected with temperature sensor.
Preferably, the inlet pipeline is connected with a branch pipe branched from a discharge pipe section of the compressor.
Preferably, the outlet pipeline is communicated with a suction port of the compressor or an inlet of the evaporator.
Preferably, the microcomputer controller is used for controlling the proportional control valve, and the microcomputer controller interface comprises a power supply interface, a motor controller line interface and a temperature sensor interface.
Preferably, the proportional control valve mainly comprises a valve body, a valve core and a stepping motor.
Preferably, the valve body part of the proportional control valve is respectively connected with the inlet pipeline and the outlet pipeline, and a welding interface is reserved.
Advantageous effects
Compared with the traditional start-stop control, the proportion control can realize stable response and transition, the actual control effect temperature fluctuation is small, and the control curve is smooth and stable.
Drawings
Fig. 1 is a schematic plan view of the present invention.
Reference numerals
1-inlet pipeline, 2-outlet pipeline, 3-proportion regulating valve, 4-microcomputer controller and 5-temperature sensor.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
Examples
As shown in fig. 1, an assembly for hot gas bypass of a refrigeration system comprises an inlet pipeline 1 and an outlet pipeline 2, wherein the inlet pipeline 1 and the outlet pipeline 2 are connected with a proportional control valve 3, the working principle of the assembly is that the temperature of a control object is monitored by a temperature sensor 5, a target temperature is set on a valve controller, the proportional control valve 3 controls the opening steps through PID, so that relatively accurate bypass refrigerant flow is realized, the proportional control valve 3 is further connected with a microcomputer controller 4, and the microcomputer controller 4 is connected with the temperature sensor 5.
Preferably, the inlet line 1 is connected to a branch line from the compressor discharge line section.
Preferably, the outlet line 2 communicates with the compressor suction or evaporator inlet.
Preferably, the microcomputer controller 4 is used for controlling the proportional control valve 3, and the interface of the microcomputer controller 4 comprises a power supply interface, a motor controller line interface and a temperature sensor interface.
Preferably, the proportional control valve 3 mainly comprises a valve body, a valve core and a stepping motor.
Preferably, the valve body part of the proportional control valve 3 is respectively connected with an inlet pipeline 1 and an outlet pipeline 2, and a welding interface is reserved.
When the component works, the inlet pipeline is connected with a branch pipe which is divided from the exhaust pipe section of the compressor, the outlet pipeline is communicated with the air suction port of the compressor or the inlet of the evaporator, and the temperature sensor is arranged at a temperature control object.
The proportional controller adopts a microcomputer controller, and the interface of the proportional controller comprises a power supply interface, a motor controller line interface and a temperature sensor interface.
The valve body part of the proportional control valve is connected with an inlet pipeline and an outlet pipeline, and a welding interface is reserved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the content of the present invention within the scope of the protection of the present invention.
Claims (6)
1. An assembly for hot gas bypass of a refrigeration system, comprising an inlet line (1) and an outlet line (2), characterized in that: the inlet pipeline (1) and the outlet pipeline (2) are connected with the proportional control valve (3), the working principle of the proportional control valve is that the temperature of a control object is monitored through the temperature sensor (5), the target temperature is set on the valve controller, the proportional control valve (3) controls the opening steps through PID (proportion integration differentiation), so that relatively accurate bypass refrigerant flow is achieved, the proportional control valve (3) is further connected with the microcomputer controller (4), and the microcomputer controller (4) is connected with the temperature sensor (5).
2. An assembly for a hot gas bypass for a refrigeration system as set forth in claim 1 wherein: the inlet pipeline (1) is connected with a branch pipe branched from a compressor exhaust pipe section.
3. An assembly for a hot gas bypass for a refrigeration system as set forth in claim 1 wherein: the outlet pipeline (2) is communicated with a suction port of the compressor or an inlet of the evaporator.
4. An assembly for a hot gas bypass for a refrigeration system as set forth in claim 1 wherein: the microcomputer controller (4) is used for controlling the proportion regulating valve (3), and the interface of the microcomputer controller (4) comprises a power supply interface, a motor controller line interface and a temperature sensor interface.
5. An assembly for a hot gas bypass for a refrigeration system as set forth in claim 1 wherein: the proportional control valve (3) mainly comprises a valve body, a valve core and a stepping motor.
6. An assembly for a hot gas bypass for a refrigeration system as set forth in claim 1 wherein: the valve body part of the proportional control valve (3) is respectively connected with the inlet pipeline (1) and the outlet pipeline (2), and a welding interface is reserved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010325784.0A CN111457623A (en) | 2020-04-23 | 2020-04-23 | Component for hot gas bypass of refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010325784.0A CN111457623A (en) | 2020-04-23 | 2020-04-23 | Component for hot gas bypass of refrigeration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111457623A true CN111457623A (en) | 2020-07-28 |
Family
ID=71681350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010325784.0A Pending CN111457623A (en) | 2020-04-23 | 2020-04-23 | Component for hot gas bypass of refrigeration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111457623A (en) |
-
2020
- 2020-04-23 CN CN202010325784.0A patent/CN111457623A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Room 3 and 4, 228 Wulian Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Applicant after: Suzhou Aode high end equipment Co.,Ltd. Address before: Room 3 and 4, 228 Wulian Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Applicant before: SUZHOU AODE MACHINERY Co.,Ltd. |
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |