CN211375866U - Small-size freezer system laboratory bench - Google Patents

Small-size freezer system laboratory bench Download PDF

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Publication number
CN211375866U
CN211375866U CN202020143897.4U CN202020143897U CN211375866U CN 211375866 U CN211375866 U CN 211375866U CN 202020143897 U CN202020143897 U CN 202020143897U CN 211375866 U CN211375866 U CN 211375866U
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China
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temperature
low
valve
throttling branch
pressure
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CN202020143897.4U
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Chinese (zh)
Inventor
孙志利
徐一博
王易安
张静
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Tianjin University of Commerce
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Tianjin University of Commerce
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Abstract

The utility model discloses a small-size freezer system laboratory bench, including refrigerating system and electric system. The refrigerating system comprises a compressor, a condenser, a high-pressure liquid storage device, a four-way reversing valve, a high-temperature throttling branch, a low-temperature throttling branch, a high-temperature evaporator and a low-temperature evaporator, wherein an outlet of the high-temperature evaporator is connected with an evaporation pressure regulating valve, and a temperature measuring instrument and a pressure measuring instrument are arranged on an exhaust end of the compressor, an air suction end of the compressor, the low-temperature throttling branch, the high-temperature throttling branch and a throttling front pipeline behind a second interface of the four-way reversing valve. The outlet of the high-temperature evaporator of the experiment table is provided with the evaporation pressure regulating valve, so that the pressure behind the valve is the same as the suction pressure, and the same unit can provide cold energy for different cold storages. The flow of the refrigerant is adjusted by adjusting the low-temperature throttling branch, the high-temperature throttling branch and the evaporation pressure adjusting valve, so that students can learn refrigeration professional knowledge conveniently, and the manual operation of the students and the running and debugging capabilities of the refrigeration storage are improved.

Description

Small-size freezer system laboratory bench
Technical Field
The utility model relates to a teaching technical field, more specifically say so, relate to a real device of instructing of small-size freezer teaching.
Background
Along with the improvement of the economic level of China, the refrigeration technology is more and more widely applied to the life of people, wherein the refrigeration house plays an important role in commodity circulation and storage, so that the study of the refrigeration house and related knowledge are important contents of refrigeration professionals in various colleges, medium-class vocational schools and colleges.
At present, due to the limitation of experimental conditions, students can only carry out some simple experiments and records while studying theoretically, experimental bases are lacked for complex conditions, and the improvement of problem finding and problem solving capabilities of training personnel in actual operation is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a real device of instructing of small-size freezer teaching suitable for vocational education to the defect that exists in the current real teaching of instructing.
For realizing the utility model discloses a technical scheme that the purpose adopted is:
a small-sized cold storage system experiment table comprises a refrigeration system and an electric system; the refrigeration system comprises a compressor, a condenser, a high-pressure liquid storage device, a four-way reversing valve, a high-temperature throttling branch, a low-temperature throttling branch, a high-temperature evaporator and a low-temperature evaporator, wherein the exhaust end of the compressor is sequentially connected with the condenser and the high-pressure liquid storage device and then connected with a first interface of the four-way reversing valve, a second interface of the four-way reversing valve is divided into two paths, one path is connected with an inlet of the low-temperature evaporator through the low-temperature throttling branch, the other path is connected with an inlet of the high-temperature evaporator through the high-temperature throttling branch, an outlet of the high-temperature evaporator is connected with an evaporation pressure regulating valve, an outlet of the evaporation pressure regulating valve is connected with a third interface of the four-way reversing valve after being connected with an outlet of the low-temperature evaporator in parallel, and; and the exhaust end of the compressor, the suction end of the compressor, the low-temperature throttling branch, the high-temperature throttling branch and a throttling front pipeline behind the second interface of the four-way reversing valve are respectively provided with a temperature measuring instrument and a pressure measuring instrument, and display panels of the temperature measuring instrument and the pressure measuring instrument are fixedly arranged on a display instrument panel.
The refrigeration system takes R22 as refrigerant.
The high-temperature throttling branch is formed by connecting a high-temperature throttling valve and a high-temperature electric control valve, and the low-temperature throttling branch is formed by connecting a low-temperature throttling valve and a low-temperature electric control valve.
The temperature measuring instrument is a thermometer or a digital display type temperature sensor.
The pressure measuring instrument is a pressure gauge or a digital display type pressure sensor.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses an experimental apparatus provides cold volume by a refrigerating unit to the freezer that two evaporating temperature (pressure) are different, makes things convenient for the student when studying refrigeration professional knowledge, improves student's manual operation and abilities such as freezer operation debugging.
2. The utility model discloses an experimental apparatus sets up evaporating pressure governing valve in the export of high temperature evaporimeter, can make the pressure before the valve keep in the within range of setting, through the throttle of valve, makes the pressure behind the valve the same with suction pressure to guaranteed in the system that each evaporimeter is normal operation under different work condition separately, realized that same unit provides cold volume to the freezer of difference.
3. The utility model discloses a temperature and the pressure of each part show on same panel board among the experimental apparatus, and the intuition is strong.
4. And the system is closely combined with vocational teaching to adapt to the requirements of vocational education.
Drawings
Fig. 1 is a schematic diagram of the small-sized cold storage system experiment table of the utility model.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The utility model discloses a schematic diagram of small-size freezer system laboratory bench is shown in figure 1, including refrigerating system and electrical system. The refrigerating system comprises a compressor 1, a condenser 2, a high-pressure liquid reservoir 3, a four-way reversing valve 4, a high-temperature throttling branch, a low-temperature throttling branch, a high-temperature evaporator 5 and a low-temperature evaporator 6, the exhaust end of the compressor 1 is connected with the condenser 2 and the high-pressure liquid accumulator 3 in sequence and then is connected with the first interface of the four-way reversing valve 4, the second interface of the four-way reversing valve 4 is divided into two paths, one path is connected with the inlet of the low-temperature evaporator 6 through a low-temperature throttling branch, the other path is connected with the inlet of the high-temperature evaporator 5 through a high-temperature throttling branch, the outlet of the high-temperature evaporator 5 is connected with an evaporation pressure regulating valve 7, the outlet of the evaporation pressure regulating valve 7 is connected with the outlet of the low-temperature evaporator 6 in parallel and then connected with the third interface of the four-way reversing valve 4, and the fourth interface of the four-way reversing valve 4 is connected with the air suction end of the compressor 1. And a temperature measuring instrument 8 and a pressure measuring instrument 9 are arranged on the exhaust end of the compressor 1, the air suction end of the compressor 1, the low-temperature throttling branch, the high-temperature throttling branch and a throttling front pipeline behind the second interface of the four-way reversing valve 4, and display panels of the temperature measuring instrument 8 and the pressure measuring instrument 9 are fixedly arranged on a display instrument panel. The temperature measuring instrument 8 may employ a thermometer or a digital display type temperature sensor. The pressure measuring instrument 9 can adopt a pressure gauge or a digital display type pressure sensor. In this embodiment, the high-temperature throttling branch is formed by connecting a high-temperature throttling valve 10 and a high-temperature electronic control valve 11, and the low-temperature throttling branch is formed by connecting a low-temperature throttling valve 12 and a low-temperature electronic control valve 13.
High-temperature gas discharged by the compressor 1 is condensed by the condenser 2, then respectively enters the high-temperature throttling branch and the low-temperature throttling branch after passing through the high-pressure liquid storage device 3 and the four-way reversing valve 4, refrigerant passing through the high-temperature throttling branch enters the high-temperature evaporator 5 for heat absorption and evaporation, and flows out after passing through the evaporation pressure regulating valve 7, the refrigerant passing through the low-temperature throttling branch enters the low-temperature evaporator 6 for heat absorption and evaporation, and then returns to the air suction end of the compressor 1 together with the refrigerant flowing out of the evaporation pressure regulating valve 7 through the four-way reversing valve 4, and a refrigeration cycle is completed. In the process of refrigeration, corresponding pressure and temperature parameters are displayed on an instrument panel, and the temperature and the pressure of each measuring point can be clearly and visually displayed. In the operation process, the flow of the refrigerant is adjusted and changed by adjusting the low-temperature throttling branch, the high-temperature throttling branch and the evaporation pressure adjusting valve, so that students can conveniently learn refrigeration professional knowledge, and the manual operation, refrigeration house operation debugging and other capabilities of the students are improved.
In the practical teaching training process, the following practical teaching contents can be developed according to the practical requirements:
(1) recognizing and training components of the refrigeration system;
(2) parameter change cognition training in the cooling process of the small refrigeration house system;
(3) practical training of the use method of the evaporation pressure regulating valve;
(4) training the performance test of the small-sized refrigeration house system;
(5) training the use method of the refrigeration system instrument;
(6) training a special tool for the refrigerating system;
(7) starting, adjusting and setting the refrigerating system and training in shutdown.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (5)

1. A small-sized cold storage system experiment table is characterized by comprising a refrigerating system and an electric system; the refrigeration system comprises a compressor, a condenser, a high-pressure liquid storage device, a four-way reversing valve, a high-temperature throttling branch, a low-temperature throttling branch, a high-temperature evaporator and a low-temperature evaporator, wherein the exhaust end of the compressor is sequentially connected with the condenser and the high-pressure liquid storage device and then connected with a first interface of the four-way reversing valve, a second interface of the four-way reversing valve is divided into two paths, one path is connected with an inlet of the low-temperature evaporator through the low-temperature throttling branch, the other path is connected with an inlet of the high-temperature evaporator through the high-temperature throttling branch, an outlet of the high-temperature evaporator is connected with an evaporation pressure regulating valve, an outlet of the evaporation pressure regulating valve is connected with a third interface of the four-way reversing valve after being connected with an outlet of the low-temperature evaporator in parallel, and; and the exhaust end of the compressor, the suction end of the compressor, the low-temperature throttling branch, the high-temperature throttling branch and a throttling front pipeline behind the second interface of the four-way reversing valve are respectively provided with a temperature measuring instrument and a pressure measuring instrument, and display panels of the temperature measuring instrument and the pressure measuring instrument are fixedly arranged on a display instrument panel.
2. The small-sized cold storage system experiment table according to claim 1, wherein the refrigerating system takes R22 as a refrigerant.
3. The small-sized cold storage system experiment table according to claim 1, wherein the high-temperature throttling branch is formed by connecting a high-temperature throttling valve and a high-temperature electric control valve, and the low-temperature throttling branch is formed by connecting a low-temperature throttling valve and a low-temperature electric control valve.
4. The small cold storage system laboratory bench according to claim 1, wherein the temperature measuring instrument is a thermometer or a digital display type temperature sensor.
5. The small-sized cold storage system experiment table according to claim 1, wherein the pressure measuring instrument is a pressure gauge or a digital display type pressure sensor.
CN202020143897.4U 2020-01-22 2020-01-22 Small-size freezer system laboratory bench Active CN211375866U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020143897.4U CN211375866U (en) 2020-01-22 2020-01-22 Small-size freezer system laboratory bench

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020143897.4U CN211375866U (en) 2020-01-22 2020-01-22 Small-size freezer system laboratory bench

Publications (1)

Publication Number Publication Date
CN211375866U true CN211375866U (en) 2020-08-28

Family

ID=72156181

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020143897.4U Active CN211375866U (en) 2020-01-22 2020-01-22 Small-size freezer system laboratory bench

Country Status (1)

Country Link
CN (1) CN211375866U (en)

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