CN211578231U - Experiment system based on small-size commercial refrigerating plant - Google Patents

Experiment system based on small-size commercial refrigerating plant Download PDF

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CN211578231U
CN211578231U CN202020166805.4U CN202020166805U CN211578231U CN 211578231 U CN211578231 U CN 211578231U CN 202020166805 U CN202020166805 U CN 202020166805U CN 211578231 U CN211578231 U CN 211578231U
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pressure
low
inlet
valve
temperature evaporator
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孙志利
王彩云
陈文祥
师雅博
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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 an experimental system based on small-size commercial refrigerating plant, including compressor, condenser, high-pressure reservoir, drier-filter, regenerator, high pressure throttle unit, low pressure throttle unit, high temperature evaporimeter and low temperature evaporimeter. The high-pressure throttling unit comprises a high-pressure thermostatic expansion valve branch, a high-pressure capillary branch and a high-pressure needle-shaped throttling valve branch which are connected in parallel; the low-pressure throttling unit comprises a low-pressure thermostatic expansion valve branch and a low-pressure capillary branch which are connected in parallel. The pipeline between the exhaust port of the compressor and the condenser, the pipeline of the air suction port of the compressor, the inlet pipeline of the high-temperature evaporator, the inlet pipeline of the low-temperature evaporator and the outlet pipeline of the low-temperature evaporator are respectively provided with a liquid viewing mirror. The system can realize multiple functions of manual switching of the throttling mode, troubleshooting, refrigerant observation and the like of the refrigeration system, so that the teaching process is richer and more practical. The method can simulate the actual operation conditions under different working conditions, and is favorable for improving the fault analysis capability of students.

Description

Experiment system based on small-size commercial refrigerating plant
Technical Field
The utility model relates to an experimental facilities technical field, more specifically say so, relate to an experimental system based on small-size commercial refrigerating plant.
Background
The refrigeration technology is a technology combining theory and practice, and experimental teaching has irreplaceable important function on training the practical ability of students and solving the practical problem. At present, in the teaching process of the refrigeration technology, due to the lack of experimental equipment, students often can only carry out simple simulation experiments, can not comprehensively combine the refrigeration knowledge mastered by the students with practical application, often lack the technical means for overcoming practical problems in the actual working process, and influence the normal operation of work.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the technical defect who exists among the prior art, and provide a small-size commercial refrigerating plant's that can realize multiple functions such as manual switching throttling mode, troubleshooting and refrigerant observation experimental system.
For realizing the utility model discloses a technical scheme that the purpose adopted is:
an experimental system based on a small-sized commercial refrigerating device comprises a compressor, a condenser, a high-pressure liquid storage device, a drying filter, a heat regenerator, a high-pressure throttling unit, a low-pressure throttling unit, a high-temperature evaporator and a low-temperature evaporator; one path of an exhaust port of the compressor is connected with an inlet of the condenser, and the other path of the exhaust port of the compressor is connected with an inlet of the low-temperature evaporator through a defrosting electric control valve; the outlet of the condenser is divided into two paths, one path is connected with the inlet of the high-pressure liquid storage device through a seventeenth manual valve, the other path is connected with the inlet of a sixteenth manual valve, the outlet of the sixteenth manual valve is connected with the inlet of the dry filter after being connected with the outlet of the high-pressure liquid storage device in parallel, the outlet of the drying filter is divided into two paths, one path is connected with the first interface of the heat regenerator through a thirteenth manual valve, the other path is connected with one end of a twelfth manual valve, the other end of the twelfth manual valve is connected with the second interface of the heat regenerator in parallel and then is respectively connected with the high-pressure throttling unit and the low-pressure throttling unit, the high-pressure throttling unit is connected with the inlet of the high-temperature evaporator, the low-pressure throttling unit is connected with the inlet of the low-temperature evaporator, the outlet end of the high-temperature evaporator is connected with an evaporation pressure regulating valve, and both ends of the evaporation pressure regulating valve are connected with a seventh manual valve in parallel; the outlet of the low-temperature evaporator is connected with the inlet of the one-way valve; the evaporation pressure regulating valve and the seventh manual valve are connected in parallel and then divided into two paths, one path is connected with a third interface of the heat regenerator through an eleventh manual valve, the other path is connected with an outlet of the one-way valve in parallel and is connected with an inlet of a tenth manual valve, and an outlet of the tenth manual valve is respectively connected with a fourth interface of the heat regenerator and an air suction port of the compressor; the high-pressure throttling unit comprises a high-pressure thermostatic expansion valve branch, a high-pressure capillary branch and a high-pressure needle-shaped throttling valve branch which are connected in parallel; the low-pressure throttling unit comprises a low-pressure thermostatic expansion valve branch and a low-pressure capillary tube branch; and liquid sight glasses are respectively arranged on a pipeline between the exhaust port of the compressor and the condenser, a pipeline of an air suction port of the compressor, an inlet pipeline of the high-temperature evaporator, an inlet pipeline of the low-temperature evaporator and an outlet pipeline of the low-temperature evaporator.
Pressure sensors are respectively arranged at an air suction port and an air exhaust port of the compressor, and at inlets and outlets of the low-temperature evaporator and the high-temperature evaporator; the temperature control system is characterized in that temperature sensors are respectively arranged on pipelines of a suction end and a discharge end of the compressor, a temperature controller is arranged at an outlet of the low-temperature evaporator, and a thermostat is arranged at an outlet of the high-temperature evaporator.
And valve groups which are formed by connecting a manual valve and an electric control valve in parallel are respectively arranged at the inlet end of the low-temperature throttling unit and the inlet end of the high-temperature throttling unit.
And an inlet end valve is arranged on the heat regenerator.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a small-size commercial refrigerating plant experimental system has increased refrigeration plant's teaching experiment link on the basis of study refrigerating plant theoretical knowledge, and this system can realize multiple functions such as manual switching throttle mode of refrigerating system, troubleshooting and refrigerant observation, makes the teaching process abundanter, and is fit for the engineering reality.
2. The utility model discloses an experimental system can simulate actual operation condition under the different operating modes, is favorable to improving the student to the analytical ability of trouble.
3. The utility model discloses a real standard operation experimental system is equipped with high pressure controller and low pressure controller, but the high-low pressure protection of simulation compressor.
4. The utility model discloses an experimental system is equipped with measuring device such as temperature sensor, manometer, can carry out small-size commercial refrigerating plant's basic parameter measurement and capability test.
Drawings
Fig. 1 shows a schematic diagram of an experimental system based on a small-sized commercial refrigeration device.
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 experimental system based on small-size commercial refrigerating plant is shown in figure 1, including compressor 14, condenser 15, high-pressure reservoir 16, drying filter 17, regenerator 13, high pressure throttle unit, low pressure throttle unit, high temperature evaporator 1 and low temperature evaporator 2. One path of an exhaust port of the compressor 14 is connected with an inlet of the condenser 15, and the other path of the exhaust port is connected with an inlet of the low-temperature evaporator 2 through the defrosting electric control valve 12C; the outlet of the condenser 15 is divided into two paths, one path is connected with the inlet of the high-pressure liquid reservoir 16 through a seventeenth manual valve 8r, the other path is connected with the inlet of a sixteenth manual valve 8q, the outlet of the sixteenth manual valve 8q is connected with the outlet of the high-pressure liquid reservoir 16 in parallel and then connected with the inlet of the drying filter 17, the outlet of the drying filter 17 is divided into two paths, one path is connected with the first interface of the heat regenerator 13 through a thirteenth manual valve 8n, the other path is connected with one end of a twelfth manual valve 8m, the other end of the twelfth manual valve 8m is connected with the second interface of the heat regenerator 13 in parallel and then respectively connected with the high-pressure throttling unit and the low-pressure throttling unit, the high-pressure throttling unit is connected with the inlet of the high-temperature evaporator 1, the low-pressure throttling unit is connected with the inlet of the low-temperature evaporator 2, the outlet end of the high-, and seventh manual valves 8g are connected in parallel at both ends of the evaporation pressure regulating valve 11. The outlet of the low-temperature evaporator 2 is connected with the inlet of a one-way valve 19; the evaporation pressure regulating valve 11 and the seventh manual valve 8g are connected in parallel and then divided into two paths, one path is connected with the third interface of the heat regenerator 13 through an eleventh manual valve 8l, the other path is connected with the outlet of the one-way valve in parallel and is connected with the inlet of a tenth manual valve 8k, and the outlet of the tenth manual valve 8k is respectively connected with the fourth interface of the heat regenerator 13 and the air suction port of the compressor 14. The high-pressure throttling unit comprises a high-pressure thermostatic expansion valve branch, a high-pressure capillary branch and a high-pressure needle-shaped throttling valve branch which are connected in parallel; the high-pressure thermostatic expansion valve branch is formed by connecting a high-pressure thermostatic expansion valve 7a and a first manual valve 8a in series, and the high-pressure capillary tube branch is formed by connecting a high-pressure capillary tube 9a, a second manual valve 8b and a third manual valve 8c which are connected with two ends of the high-pressure capillary tube 9a in series; the high-pressure needle-shaped throttle valve branch is formed by connecting a needle-shaped throttle valve 10 and an eighteenth manual valve 8s in series. The low-pressure throttling unit comprises a low-pressure thermostatic expansion valve branch and a low-pressure capillary tube branch; the branch of the low-pressure thermostatic expansion valve is formed by connecting a low-pressure thermostatic expansion valve 7b and a sixth manual valve 8f in series, and the branch of the low-pressure capillary tube is formed by connecting a low-pressure capillary tube 9b, a fourth manual valve 8d and a fifth manual valve 8e which are connected with two ends of the low-pressure capillary tube 9b in series.
A liquid viewing mirror 6 is respectively arranged on a pipeline between the exhaust port of the compressor 14 and the condenser 15, a pipeline of the suction port of the compressor 14, an inlet pipeline of the high-temperature evaporator 1, an inlet pipeline of the low-temperature evaporator 2 and an outlet pipeline of the low-temperature evaporator 2.
The exhaust port of the compressor 14 is provided with a temperature sensor 20a and a pressure sensor 3f, and the intake port of the compressor is provided with a temperature sensor 20b and a pressure sensor 3e, which measure the temperature and pressure of the exhaust and intake of the compressor 14. The import of low temperature evaporimeter 2 is provided with pressure sensor 3c, the export of low temperature evaporimeter 2 is provided with pressure sensor 3d, the import of high temperature evaporimeter 1 is provided with pressure sensor 3a, the export of high temperature evaporimeter 1 is provided with pressure sensor 3b, measures low temperature evaporimeter 2 high temperature evaporimeter 1 import and export pressure. The export of low temperature evaporimeter 2 is provided with temperature controller 5, the export of high temperature evaporimeter 1 is equipped with thermostat 4, monitors the temperature change condition in freezer 1 and the freezer 2 at any time. And further realizing the performance test of the experiment of the small-sized commercial refrigerating device according to the measured basic parameters.
Wherein, the condenser 15 is an air-cooled condenser.
And a valve group consisting of a ninth manual valve 8i and a second electric control valve 12b which are connected in parallel is arranged at the inlet end of the low-pressure throttling unit. And a valve bank formed by connecting an eighth manual valve 8h and a first electric control valve 12a in parallel is arranged at the inlet end of the high-pressure throttling unit. An inlet end valve 18 is mounted on the regenerator 13.
A fourteenth manual valve 8o and a fifteenth manual valve 8p are connected in series to both ends of the dry filter 17.
The compressor 14 compresses low-temperature low-pressure refrigerant gas to a high-temperature high-pressure state, then enters the air-cooled condenser 15 to be condensed into normal-temperature high-pressure refrigerant liquid, and then enters the heat regenerator 13 after being dried and filtered by the drying filter 17 to exchange heat with the low-temperature refrigerant from the outlets of the low-temperature evaporator 2 and the high-temperature evaporator 1, so that the refrigerant gas at the outlets of the two evaporators is overheated, and the refrigerant at the outlet of the air-cooled condenser 15 is subcooled. The refrigerant from the heat regenerator 13 is divided into two paths, namely a high-temperature loop and a low-temperature loop. In the high-temperature loop, the refrigerant enters a high-pressure throttling unit through the first electric control valve 12a, the throttling mode is switched in the high-pressure throttling unit through manually adjusting the first manual valve 8a, the third manual valve 8c and the eighteenth manual valve 8s, the refrigerant enters the high-temperature evaporator 1 to absorb heat and evaporate after being throttled and depressurized by a high-pressure thermal expansion valve 7a or a high-pressure capillary tube 9a or a high-pressure needle-shaped throttling valve 10, and then enters the evaporation pressure adjusting valve 10 to adjust the pressure of the refrigerant; refrigerant in the low-temperature loop enters a low-pressure throttling unit through the second electric control valve 12b, the throttling mode is switched in the low-pressure throttling unit through manually adjusting the sixth manual valve 8f and the fifth manual valve 8e, the refrigerant enters the low-temperature evaporator 2 to absorb heat and evaporate after being throttled and depressurized by the low-pressure thermal expansion valve 7b or the low-pressure capillary tube 9b, the refrigerant at the outlet of the low-temperature evaporator 2 passes through the one-way valve 19 and then is mixed with the refrigerant from the high-temperature evaporator 1, the refrigerant enters the compressor 14 together, and part of the refrigerant from the two evaporators enters the heat regenerator 13 to sequentially circulate.
The utility model discloses experimental system's defrosting process: the high-temperature and high-pressure refrigerant vapor at the outlet of the compressor 14 enters the low-temperature evaporator 2 after passing through the defrosting electric control valve 12c to perform a hot gas defrosting process.
The utility model discloses a small-size commercial refrigerating plant experimental system has increased refrigeration plant's teaching experiment link on the basis of learning refrigerating plant theoretical knowledge, and this platform can realize multiple functions such as manual switching throttle mode, troubleshooting and refrigerant observation of refrigerating system. The teaching process is richer and is suitable for engineering practice.
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 (4)

1. An experimental system based on a small-sized commercial refrigerating device is characterized by comprising a compressor, a condenser, a high-pressure liquid storage device, a drying filter, a heat regenerator, a high-pressure throttling unit, a low-pressure throttling unit, a high-temperature evaporator and a low-temperature evaporator; one path of an exhaust port of the compressor is connected with an inlet of the condenser, and the other path of the exhaust port of the compressor is connected with an inlet of the low-temperature evaporator through a defrosting electric control valve; the outlet of the condenser is divided into two paths, one path is connected with the inlet of the high-pressure liquid storage device through a seventeenth manual valve, the other path is connected with the inlet of a sixteenth manual valve, the outlet of the sixteenth manual valve is connected with the inlet of the dry filter after being connected with the outlet of the high-pressure liquid storage device in parallel, the outlet of the drying filter is divided into two paths, one path is connected with the first interface of the heat regenerator through a thirteenth manual valve, the other path is connected with one end of a twelfth manual valve, the other end of the twelfth manual valve is connected with the second interface of the heat regenerator in parallel and then is respectively connected with the high-pressure throttling unit and the low-pressure throttling unit, the high-pressure throttling unit is connected with the inlet of the high-temperature evaporator, the low-pressure throttling unit is connected with the inlet of the low-temperature evaporator, the outlet end of the high-temperature evaporator is connected with an evaporation pressure regulating valve, and both ends of the evaporation pressure regulating valve are connected with a seventh manual valve in parallel; the outlet of the low-temperature evaporator is connected with the inlet of the one-way valve; the evaporation pressure regulating valve and the seventh manual valve are connected in parallel and then divided into two paths, one path is connected with a third interface of the heat regenerator through an eleventh manual valve, the other path is connected with an outlet of the one-way valve in parallel and is connected with an inlet of a tenth manual valve, and an outlet of the tenth manual valve is respectively connected with a fourth interface of the heat regenerator and an air suction port of the compressor; the high-pressure throttling unit comprises a high-pressure thermostatic expansion valve branch, a high-pressure capillary branch and a high-pressure needle-shaped throttling valve branch which are connected in parallel; the low-pressure throttling unit comprises a low-pressure thermostatic expansion valve branch and a low-pressure capillary tube branch; and liquid sight glasses are respectively arranged on a pipeline between the exhaust port of the compressor and the condenser, a pipeline of an air suction port of the compressor, an inlet pipeline of the high-temperature evaporator, an inlet pipeline of the low-temperature evaporator and an outlet pipeline of the low-temperature evaporator.
2. The experimental system based on the small-scale commercial refrigerating device according to claim 1, wherein the air suction port and the air discharge port of the compressor, and the inlet and the outlet of the low-temperature evaporator and the high-temperature evaporator are respectively provided with a pressure sensor; the temperature control system is characterized in that temperature sensors are respectively arranged on pipelines of a suction end and a discharge end of the compressor, a temperature controller is arranged at an outlet of the low-temperature evaporator, and a thermostat is arranged at an outlet of the high-temperature evaporator.
3. The experimental system based on the small-scale commercial refrigerating device according to claim 1, wherein the inlet end of the low-temperature throttling unit and the inlet end of the high-temperature throttling unit are respectively provided with a valve group formed by connecting a manual valve and an electric control valve in parallel.
4. Experimental system based on small commercial refrigerators according to claim 1, characterized in that the regenerator is fitted with an inlet port valve.
CN202020166805.4U 2020-02-13 2020-02-13 Experiment system based on small-size commercial refrigerating plant Active CN211578231U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020166805.4U CN211578231U (en) 2020-02-13 2020-02-13 Experiment system based on small-size commercial refrigerating plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020166805.4U CN211578231U (en) 2020-02-13 2020-02-13 Experiment system based on small-size commercial refrigerating plant

Publications (1)

Publication Number Publication Date
CN211578231U true CN211578231U (en) 2020-09-25

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Application Number Title Priority Date Filing Date
CN202020166805.4U Active CN211578231U (en) 2020-02-13 2020-02-13 Experiment system based on small-size commercial refrigerating plant

Country Status (1)

Country Link
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