CN111179683A - One-machine two-storeroom refrigerating device teaching experiment system - Google Patents

One-machine two-storeroom refrigerating device teaching experiment system Download PDF

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Publication number
CN111179683A
CN111179683A CN202010074461.9A CN202010074461A CN111179683A CN 111179683 A CN111179683 A CN 111179683A CN 202010074461 A CN202010074461 A CN 202010074461A CN 111179683 A CN111179683 A CN 111179683A
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CN
China
Prior art keywords
temperature
low
evaporation pressure
evaporator
pressure module
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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
CN202010074461.9A
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Chinese (zh)
Inventor
孙志利
高泓源
张静
徐嘉沛
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Tianjin University of Commerce
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Tianjin University of Commerce
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Publication date
Application filed by Tianjin University of Commerce filed Critical Tianjin University of Commerce
Priority to CN202010074461.9A priority Critical patent/CN111179683A/en
Publication of CN111179683A publication Critical patent/CN111179683A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B9/00Simulators for teaching or training purposes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B25/00Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes

Abstract

The invention relates to a teaching experiment system of a refrigerating device with two storehouses, and aims to provide a teaching experiment system which can be adjusted in various ways and has a simple structure. Consists of a refrigeration system and a cold room; the refrigerating system comprises a compressor, a condenser, a liquid storage device, a drying filter, a high evaporation pressure module and a low evaporation pressure module; the cold room comprises a low-temperature cold room and a high-temperature cold room; the high-temperature evaporator is arranged in the high-temperature cold room, and the low-temperature evaporator is arranged in the low-temperature cold room; the high evaporation pressure module and the low evaporation pressure module are connected in parallel, and an evaporation pressure regulating valve is installed at the outlet of the high-temperature evaporator. In order to prevent the occurrence of liquid impact accidents, a one-way valve is installed at the outlet of the low-temperature evaporator. By changing the opening, closing or opening degree adjustment of the evaporation pressure regulating valve, each manual regulating valve and the electric control valve, the operation of the one-machine two-warehouse refrigerating system can be accurately simulated, and the working principle and fault analysis of the one-machine two-warehouse refrigerating device can be further mastered.

Description

One-machine two-storeroom refrigerating device teaching experiment system
Technical Field
The invention relates to the technical field of refrigeration, in particular to a teaching experiment system of a one-machine two-warehouse refrigeration device.
Background
With the continuous development of the logistics field, the refrigeration house plays an important role in the commodity circulation and storage process. Therefore, learning refrigerators and related knowledge are important for refrigeration professionals in colleges, middle-occupational schools and colleges.
When evaporators with different temperatures share one return gas pipeline, the evaporation pressure of a refrigerant of each evaporator is different, and the suction pressure of a compressor is consistent with the evaporation pressure of the cold room evaporator with the lowest evaporation temperature, so that how to ensure the running stability of a refrigerating system is a necessary condition for normal running of the refrigeration house. In the actual learning process of the refrigeration house refrigeration system, a student is required to perform actual operation training so as to improve the analysis and judgment of the student on faults occurring in the operation process of the refrigeration house refrigeration system.
Disclosure of Invention
The invention aims to provide a teaching experiment system which can simulate the operation process of a refrigerating device with two storehouses in one machine, can carry out various adjustments and has a simple structure, aiming at the technical defects in the prior art.
The technical scheme adopted for realizing the purpose of the invention is as follows:
a teaching experiment system of a refrigerating device with two storehouses in one machine consists of a refrigerating system and a cold room; the refrigerating system comprises a compressor, a condenser, a liquid storage device, a drying filter, a high evaporation pressure module and a low evaporation pressure module; the exhaust end of the compressor is sequentially connected with the condenser, the liquid storage device and the drying filter, the high evaporation pressure module and the low evaporation pressure module are connected in parallel, the outlet of the drying filter is respectively connected with one end of the inlet of the high evaporation pressure module and one end of the outlet of the low evaporation pressure module which are connected in parallel, and one end of the outlet of the high evaporation pressure module and one end of the outlet of the low evaporation pressure module which are connected in parallel are connected with the air suction end of the compressor; the high-evaporation-pressure module comprises a high-temperature electric control valve, a high-temperature thermal expansion valve and a high-temperature evaporator which are sequentially connected, an evaporation pressure regulating valve is installed at an outlet of the high-temperature evaporator, and a high-temperature flow meter is arranged at the front end of the high-temperature electric control valve; the low evaporation pressure module comprises a low-temperature electric control valve, a low-temperature thermal expansion valve and a low-temperature evaporator which are sequentially connected, a one-way valve is installed at an outlet of the low-temperature evaporator, and a low-temperature flow meter is arranged at the front end of the low-temperature electric control valve; the cold room comprises a low-temperature cold room and a high-temperature cold room; the high-temperature evaporator is arranged in the high-temperature cold room, and the low-temperature evaporator is arranged in the low-temperature cold room; the high-temperature evaporator and the low-temperature evaporator are respectively provided with a first temperature measuring instrument; and second temperature measuring instruments are respectively arranged between the compressor and the condenser, between the condenser and the liquid storage device, between the low-temperature electric control valve and the low-temperature thermostatic expansion valve, at the outlet of the low-temperature evaporator, between the high-temperature electric control valve and the high-temperature thermostatic expansion valve, at the inlet of the high-temperature evaporator, at the outlet of the high-temperature evaporator and between the one-way valve and the compressor.
Compared with the prior art, the invention has the beneficial effects that:
the teaching experiment system of the invention is provided with the evaporation pressure regulating valve on the outlet pipeline of the evaporator with higher evaporation temperature. In addition, because the evaporators of the high-temperature cold room and the low-temperature cold room share the same return gas pipeline, in order to prevent the occurrence of liquid impact accidents, the one-way valve is arranged on the outlet pipeline of the evaporator of the low-temperature cold room, the operation of a refrigerating system of two storehouses of one machine can be accurately simulated, and the demonstration of liquid supply to the storehouses with two different evaporation temperature requirements by one machine set and the study on the structure, the setting and the adjusting principle of the evaporation pressure adjusting valve can be carried out.
Drawings
Fig. 1 is a schematic diagram of a teaching experiment system of a one-machine two-warehouse refrigerating device of the invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific examples.
The principle diagram of the teaching experiment system of the one-machine two-storeroom refrigerating device is shown in figure 1 and consists of a refrigerating system and a cold room. The refrigerating system comprises a compressor 1, a condenser 3, a liquid storage device 2, a drying filter 13, a high evaporation pressure module and a low evaporation pressure module. Compressor 1's exhaust end with condenser 3, reservoir 2, drier-filter 13 connect gradually, high evaporating pressure module and low evaporating pressure module parallel connection, drier-filter 13's export respectively with the parallelly connected import one end of high evaporating pressure module and low evaporating pressure module is connected, the parallelly connected export one end of high evaporating pressure module and low evaporating pressure module with compressor 1's the end of breathing in is connected. The high evaporation pressure module comprises a high-temperature electric control valve 7, a high-temperature thermal expansion valve 6 and a high-temperature evaporator 5 which are sequentially connected, an evaporation pressure regulating valve 4 is installed at an outlet of the high-temperature evaporator 5, and a high-temperature flow meter 8 is arranged at the front end of the high-temperature electric control valve 7. The low evaporation pressure module comprises a low-temperature electric control valve, a low-temperature thermal expansion valve 11 and a low-temperature evaporator 12 which are sequentially connected, a one-way valve 15 is installed at an outlet of the low-temperature evaporator 12, and a low-temperature flowmeter 10 is arranged at the front end of the low-temperature electric control valve. The cold room comprises a low-temperature cold room and a high-temperature cold room, the high-temperature evaporator 5 is arranged in the high-temperature cold room, and the low-temperature evaporator 12 is arranged in the low-temperature cold room. The high temperature evaporator 5 and the low temperature evaporator 12 are respectively provided with a first temperature measuring instrument 14. And second temperature measuring instruments 16 are respectively arranged between the compressor 1 and the condenser 3, between the condenser 3 and the liquid storage device 2, between the low-temperature electric control valve and the low-temperature thermostatic expansion valve 11, at an outlet of the low-temperature evaporator 12, between the high-temperature electric control valve 7 and the high-temperature thermostatic expansion valve 6, at an inlet of the high-temperature evaporator 5, at an outlet of the high-temperature evaporator 5 and between the check valve 15 and the compressor 1. The first temperature measuring instrument 14 and the second temperature measuring instrument 16 are digital thermometers or temperature sensors.
And manual regulating valves 9 are respectively arranged at the front ends of the high-temperature flow meter 8 and the low-temperature flow meter 10, at the two ends of the high-temperature evaporator 5 and at the two ends of the low-temperature evaporator 12.
The refrigerant discharged from the exhaust end of the compressor 1 passes through the condenser 3, the liquid storage device 2 and the drying filter 13 in sequence and then is divided into two paths, wherein one path enters the high-temperature evaporator 5 through the manual regulating valve, the high-temperature flow meter 8, the high-temperature electric control valve 7, the high-temperature thermostatic expansion valve 6 and the manual regulating valve, absorbs heat in the high-temperature evaporator 5 for evaporation, and then enters the evaporation pressure regulating valve 4 through the manual regulating valve; the other path enters a low-temperature evaporator 12 through a manual regulating valve, a low-temperature flowmeter 10, a low-temperature electric control valve, a low-temperature thermal expansion valve 11 and the manual regulating valve, absorbs heat in the low-temperature evaporator 12 for evaporation, then enters a one-way valve 15 through the manual regulating valve, and refrigerant flowing out of the one-way valve 15 and refrigerant flowing out of an evaporation pressure regulating valve 4 enter the air suction end of the compressor 1 together to complete primary circulation. In the experimental process, the working principle and the fault analysis of the refrigerating device in the two storehouses of one machine are further mastered by changing the opening, closing or opening degree regulation of the evaporation pressure regulating valve, each manual regulating valve and the electric control valve.
The teaching experiment system for the refrigerating device with two storehouses in one machine has one refrigerating compression and condensation unit to supply cold amount to two cold rooms with different evaporating temperatures, and when evaporators with different temperatures share one air return pipeline, the evaporating pressure of the refrigerant in each evaporator is different, and the suction pressure of the compressor is consistent with the evaporating pressure of the cold room evaporator with the lowest evaporating temperature. In order to maintain the evaporation temperature (evaporation pressure) necessary for each cold room during the operation of the refrigeration system, an evaporation pressure regulating valve is provided on the outlet line of the evaporator having a higher evaporation temperature. In addition, because the evaporators of the high-temperature and low-temperature cold rooms share the same return gas pipeline, in order to prevent the occurrence of liquid impact accidents, the experimental device is provided with a one-way valve on the outlet pipeline of the evaporator of the low-temperature cold room. The demonstration of supplying liquid to two different evaporation temperature requirement libraries by one unit and the study of the structure, the setting and the regulation principle of the evaporation pressure regulating valve can be carried out.
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 (3)

1. A teaching experiment system of a refrigerating device with two storehouses is characterized by comprising a refrigerating system and a cold room; the refrigerating system comprises a compressor, a condenser, a liquid storage device, a drying filter, a high evaporation pressure module and a low evaporation pressure module; the exhaust end of the compressor is sequentially connected with the condenser, the liquid storage device and the drying filter, the high evaporation pressure module and the low evaporation pressure module are connected in parallel, the outlet of the drying filter is respectively connected with one end of the inlet of the high evaporation pressure module and one end of the outlet of the low evaporation pressure module which are connected in parallel, and one end of the outlet of the high evaporation pressure module and one end of the outlet of the low evaporation pressure module which are connected in parallel are connected with the air suction end of the compressor; the high-evaporation-pressure module comprises a high-temperature electric control valve, a high-temperature thermal expansion valve and a high-temperature evaporator which are sequentially connected, an evaporation pressure regulating valve is installed at an outlet of the high-temperature evaporator, and a high-temperature flow meter is arranged at the front end of the high-temperature electric control valve; the low evaporation pressure module comprises a low-temperature electric control valve, a low-temperature thermal expansion valve and a low-temperature evaporator which are sequentially connected, a one-way valve is installed at an outlet of the low-temperature evaporator, and a low-temperature flow meter is arranged at the front end of the low-temperature electric control valve; the cold room comprises a low-temperature cold room and a high-temperature cold room; the high-temperature evaporator is arranged in the high-temperature cold room, and the low-temperature evaporator is arranged in the low-temperature cold room; the high-temperature evaporator and the low-temperature evaporator are respectively provided with a first temperature measuring instrument; and second temperature measuring instruments are respectively arranged between the compressor and the condenser, between the condenser and the liquid storage device, between the low-temperature electric control valve and the low-temperature thermostatic expansion valve, at the outlet of the low-temperature evaporator, between the high-temperature electric control valve and the high-temperature thermostatic expansion valve, at the inlet of the high-temperature evaporator, at the outlet of the high-temperature evaporator and between the one-way valve and the compressor.
2. The one-machine two-warehouse refrigerating device teaching experiment system as claimed in claim 1, wherein manual regulating valves are respectively installed at the front end of the high-temperature flow meter, the front end of the low-temperature flow meter, the two ends of the high-temperature evaporator and the two ends of the low-temperature evaporator.
3. The one-machine two-warehouse refrigerating device teaching experiment system as claimed in claim 1, wherein the first temperature measuring instrument and the second temperature measuring instrument are digital thermometers or temperature sensors.
CN202010074461.9A 2020-01-22 2020-01-22 One-machine two-storeroom refrigerating device teaching experiment system Pending CN111179683A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010074461.9A CN111179683A (en) 2020-01-22 2020-01-22 One-machine two-storeroom refrigerating device teaching experiment system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010074461.9A CN111179683A (en) 2020-01-22 2020-01-22 One-machine two-storeroom refrigerating device teaching experiment system

Publications (1)

Publication Number Publication Date
CN111179683A true CN111179683A (en) 2020-05-19

Family

ID=70652920

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010074461.9A Pending CN111179683A (en) 2020-01-22 2020-01-22 One-machine two-storeroom refrigerating device teaching experiment system

Country Status (1)

Country Link
CN (1) CN111179683A (en)

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