CN111161620A - Experiment system based on small-size commercial refrigerating plant - Google Patents
Experiment system based on small-size commercial refrigerating plant Download PDFInfo
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- CN111161620A CN111161620A CN202010090011.9A CN202010090011A CN111161620A CN 111161620 A CN111161620 A CN 111161620A CN 202010090011 A CN202010090011 A CN 202010090011A CN 111161620 A CN111161620 A CN 111161620A
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G—PHYSICS
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- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
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Abstract
The invention discloses an experimental system based on a small commercial refrigerating device, which 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. 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-pressure evaporator, the inlet pipeline of the low-pressure evaporator and the outlet pipeline of the low-pressure 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 is suitable for engineering practice. The method can simulate the actual operation conditions under different working conditions, and is favorable for improving the fault analysis capability of students.
Description
Technical Field
The invention relates to the technical field of experimental equipment, in particular to an experimental system based on a small-sized commercial refrigerating device.
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.
Disclosure of Invention
The invention aims to provide an experimental system of a small commercial refrigeration device, which can realize multiple functions of manually switching throttling modes, troubleshooting, refrigerant observation and the like, aiming at the technical defects in the prior art.
The technical scheme adopted for realizing the purpose of the invention is as follows:
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 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-pressure evaporator, an inlet pipeline of the low-pressure evaporator and an outlet pipeline of the low-pressure evaporator are respectively provided with a liquid viewing mirror.
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 invention has the beneficial effects that:
1. the experimental system for the small commercial refrigerating device provided by the invention is additionally provided with a teaching experimental link of the refrigerating device on the basis of learning the theoretical knowledge of the refrigerating device, and can realize multiple functions of manually switching a throttling mode, troubleshooting, refrigerant observation and the like of the refrigerating system, so that the teaching process is richer and is in accordance with the engineering practice.
2. The experimental system can simulate the actual operation conditions under different working conditions, and is favorable for improving the fault analysis capability of students.
3. The practical training operation experiment system is provided with the high-pressure controller and the low-pressure controller, and can simulate the high-pressure and low-pressure protection of the compressor.
4. The experimental system is provided with measuring devices such as a temperature sensor and a pressure gauge, and can be used for measuring basic parameters and testing performance of a small commercial refrigerating device.
Drawings
Fig. 1 shows a schematic diagram of an experimental system based on a small commercial refrigeration unit according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific examples.
The experimental system of the invention based on the small-scale commercial refrigerating plant is shown in figure 1, and comprises a compressor 14, a condenser 15, a high-pressure reservoir 16, a drying filter 17, a heat regenerator 13, a high-pressure throttling unit, a low-pressure throttling unit, a high-temperature evaporator 1 and a 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 an air suction port of the compressor 14, an inlet pipeline of the high-pressure evaporator 1, an inlet pipeline of the low-pressure evaporator 2 and an outlet pipeline of the low-pressure 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 electromagnetic 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 reduced 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 circulate sequentially.
The defrosting process of the experimental system of the invention comprises the following steps: 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 experimental system for the small commercial refrigerating device provided by the invention is additionally provided with a teaching experimental link of the refrigerating device on the basis of learning the theoretical knowledge of the refrigerating device, and the platform can realize multiple functions of manually switching a throttling mode, troubleshooting, refrigerant observation and the like of the 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, 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 (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 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-pressure evaporator, an inlet pipeline of the low-pressure evaporator and an outlet pipeline of the low-pressure evaporator are respectively provided with a liquid viewing mirror.
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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010090011.9A CN111161620A (en) | 2020-02-13 | 2020-02-13 | Experiment system based on small-size commercial refrigerating plant |
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| CN202010090011.9A CN111161620A (en) | 2020-02-13 | 2020-02-13 | Experiment system based on small-size commercial refrigerating plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112525570A (en) * | 2020-11-13 | 2021-03-19 | 澳柯玛股份有限公司 | Dynamic pressure resistance detection method for refrigerating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112525570A (en) * | 2020-11-13 | 2021-03-19 | 澳柯玛股份有限公司 | Dynamic pressure resistance detection method for refrigerating system |
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