CN111179684A - Small-size freezer system laboratory bench - Google Patents
Small-size freezer system laboratory bench Download PDFInfo
- Publication number
- CN111179684A CN111179684A CN202010074615.4A CN202010074615A CN111179684A CN 111179684 A CN111179684 A CN 111179684A CN 202010074615 A CN202010074615 A CN 202010074615A CN 111179684 A CN111179684 A CN 111179684A
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- temperature
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- valve
- throttling branch
- pressure
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
Abstract
The invention discloses a small-size refrigeration house system experiment table which comprises a refrigeration system and an 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
Technical Field
The invention relates to the technical field of teaching, in particular to a teaching and practical training device for a small refrigeration house.
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.
Disclosure of Invention
The invention aims to provide a small-sized cold storage teaching practical training device suitable for vocational education aiming at the defects in the conventional practical training teaching.
The technical scheme adopted for realizing the purpose of the invention is as follows:
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 invention has the beneficial effects that:
1. the experimental device provided by the invention has the advantages that one refrigerating unit provides cold energy to two cold storages with different evaporation temperatures (pressures), so that students can conveniently learn refrigeration professional knowledge and improve the manual operation of the students and the running debugging capability of the cold storages.
2. According to the experimental device, the evaporation pressure regulating valve is arranged at the outlet of the high-temperature evaporator, so that the pressure before the valve can be kept in a set range, and the pressure after the valve is the same as the suction pressure through the throttling of the valve, so that the evaporators in the system can be ensured to normally operate under different working conditions, and the same unit can provide cold energy for different cold storages.
3. The temperature and pressure of each part in the experimental device are displayed on the same instrument panel, 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 a small-sized cold storage system experiment table according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific examples.
The schematic diagram of the small-sized cold storage system experiment table is shown in figure 1 and comprises a refrigerating system and an electric 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, 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 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010074615.4A CN111179684A (en) | 2020-01-22 | 2020-01-22 | Small-size freezer system laboratory bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010074615.4A CN111179684A (en) | 2020-01-22 | 2020-01-22 | Small-size freezer system laboratory bench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111179684A true CN111179684A (en) | 2020-05-19 |
Family
ID=70658153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010074615.4A Pending CN111179684A (en) | 2020-01-22 | 2020-01-22 | Small-size freezer system laboratory bench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111179684A (en) |
-
2020
- 2020-01-22 CN CN202010074615.4A patent/CN111179684A/en active Pending
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