CN111179729A - Fault simulation and detection practical training experiment platform for single-stage vapor compression refrigeration system - Google Patents

Fault simulation and detection practical training experiment platform for single-stage vapor compression refrigeration system Download PDF

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Publication number
CN111179729A
CN111179729A CN202010074488.8A CN202010074488A CN111179729A CN 111179729 A CN111179729 A CN 111179729A CN 202010074488 A CN202010074488 A CN 202010074488A CN 111179729 A CN111179729 A CN 111179729A
Authority
CN
China
Prior art keywords
throttling
compression refrigeration
evaporator
vapor compression
condenser
Prior art date
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
CN202010074488.8A
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Chinese (zh)
Inventor
孙志利
焦峰
师雅博
权建华
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Tianjin University of Commerce
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Tianjin University of Commerce
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Filing date
Publication date
Application filed by Tianjin University of Commerce filed Critical Tianjin University of Commerce
Priority to CN202010074488.8A priority Critical patent/CN111179729A/en
Publication of CN111179729A publication Critical patent/CN111179729A/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
    • G09B25/00Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
    • G09B25/02Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00Subject matter not provided for in other groups of this subclass
    • G01M99/005Testing of complete machines, e.g. washing-machines or mobile phones
    • 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

Abstract

The invention discloses a single-stage vapor compression refrigeration system fault simulation and detection practical training experiment platform, and aims to provide an experiment teaching platform which is simple in system structure and convenient for students to practice and operate manually. The device comprises a single-stage vapor compression refrigeration circulation system and an electric control system which are arranged on a practical training platform; transparent pipe sections are arranged in the evaporator and the condenser; the air suction end of the compressor is connected with a low-pressure gauge and a low-temperature controller, and the air exhaust end of the compressor is connected with a high-pressure gauge and a high-temperature controller; the outlet of the condenser is connected with the inlet of a flow meter through a dry filter, and the outlet of the flow meter is connected with the inlet of the evaporator through a throttling device; the electric control system comprises a power supply control module, a compressor motor control module and a fan motor control module. The experiment teaching platform can be used for observing the condition of the refrigerant in the system and simulating the fault of the air conditioner, and the capability of a student for processing problems in the actual operation process is improved.

Description

Fault simulation and detection practical training experiment platform for single-stage vapor compression refrigeration system
Technical Field
The invention relates to the technical field of refrigeration, in particular to a fault simulation and detection practical training experiment platform for a single-stage vapor compression refrigeration system.
Background
Along with the rapid development of refrigeration technology, the demand on various refrigeration talents is increasing, and the practical training capability in the training process of various talents also becomes one of the key contents of the prior vocational education. At present, in the cultivation of most of refrigerating talents, a student only records and analyzes data under the operation of a refrigerating system, but rarely knows the connection between a pipeline and each part of the refrigerating system and the reasons of system operation faults, and the capability of the student for processing problems in the actual operation process is influenced.
Disclosure of Invention
The invention aims to provide an experimental teaching platform which is simple in system structure and convenient for trainees to practice manual operation, aiming at the technical defects in the prior art.
The technical scheme adopted for realizing the purpose of the invention is as follows:
a single-stage vapor compression refrigeration system fault simulation and detection practical training experiment platform comprises a single-stage vapor compression refrigeration circulation system and an electric control system which are arranged on a practical training platform; the single-stage steam compression refrigeration circulating system consists of a compressor, a condenser, an evaporator, a throttling device, a drying filter and a gas-liquid separator; transparent pipe sections are respectively arranged in the evaporator and the condenser; the air suction end of the compressor is connected with a low-pressure gauge and a low-temperature controller, and the air exhaust end of the compressor is connected with a high-pressure gauge and a high-temperature controller; the outlet of the condenser is connected with the inlet of a flow meter through the dry filter, and the outlet of the flow meter is connected with the inlet of the evaporator through the throttling device; the fans at the condenser and the evaporator are respectively controlled by a fan speed controller; manual valves are respectively arranged at the drying filter and the throttling device; the electric control system comprises a power supply control module, a compressor motor control module and a fan motor control module. A first liquid observation mirror is installed at the inlet of the condenser, and a second liquid observation mirror is installed at the outlet of the gas-liquid separator; and a third liquid sight glass is installed at the inlet of the flowmeter.
The components forming the single-stage vapor compression refrigeration cycle system are connected by adopting a threaded pipeline.
The throttling device is a throttling valve or/and a thermostatic expansion valve, and a temperature sensing bulb of the thermostatic expansion valve is arranged at an outlet of the evaporator.
The condenser is a coil type condenser, and the evaporator is a coil type evaporator.
Compared with the prior art, the invention has the beneficial effects that:
1. the experimental teaching platform can be used for observing the condition of the refrigerant in the system and simulating the fault of the air conditioner through the design of each component and the simple refrigerating system, is favorable for improving the reason for analyzing the operation fault of the system in the learning process of a student, eliminates the fault, and improves the capability of the student for processing the problem in the actual operation process.
2. The refrigerating system of the experiment teaching platform is a simple refrigerating cycle system, is simple and understandable, and can enable students to enter an experiment state more quickly.
3. The experiment platform has the advantages that the structure of each part is detachably designed, the cleaning and the maintenance are convenient, the structure is small, and the transportation is convenient.
4. The refrigeration cycle system in the test bed can research the performance of the refrigeration system in different throttling processes by two modes of capillary throttling or thermal expansion valve throttling and analyze the influence of the throttling mode on the performance of the refrigeration system.
Drawings
Fig. 1 is a schematic diagram of a single-stage vapor compression refrigeration system fault simulation and detection practical training experiment platform according to the invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific examples.
The schematic diagram of the single-stage vapor compression refrigeration system fault simulation and detection practical training experiment platform is shown in fig. 1 and comprises a single-stage vapor compression refrigeration circulation system and an electric control system which are installed on a practical training platform. The single-stage steam compression refrigeration cycle system comprises a compressor 1, a condenser 3, an evaporator 9, a throttling device, a drying filter 5 and a gas-liquid separator 10. In this embodiment, the discharge end of the compressor 1, the condenser 3, the drying filter 5, the evaporator 9, and the drying filter 10 are sequentially connected and then return to the suction end of the compressor 1, thereby forming a refrigeration cycle. The evaporator 9 and the condenser 3 are respectively provided with transparent pipe sections for observing the flowing state and condition of the refrigerant when the refrigeration cycle system operates and the state change of the refrigerant when the refrigerant flows through the heat exchanger. The air suction end of the compressor 1 is connected with a low-pressure gauge 11 and a low-temperature controller 13, and the air exhaust end of the compressor 1 is connected with a high-pressure gauge 14 and a high-temperature controller 15. The outlet of the condenser 3 is connected with the inlet of a flow meter 12 through the dry filter 5, and the outlet of the flow meter 12 is connected with the inlet of the evaporator 9 through the throttling device; the condenser 3 and the fan 4 at the evaporator 9 are controlled by a fan speed controller, respectively. And manual valves 6 are respectively arranged at the drying filter 5 and the throttling device. The electric control system comprises a power supply control module, a compressor motor control module and a fan motor control module.
A first liquid observation mirror 2 is installed at the inlet of the condenser 3, and a second liquid observation mirror 17 is installed at the outlet of the gas-liquid separator 10; the third liquid sight glass 16 is installed at the inlet of the flow meter 12, so that students can conveniently observe the state change of the refrigerant, the flowing condition, the enough filling amount and the like when the refrigerating system runs. When the refrigeration compressor starts to operate, the flow of the liquid refrigerant can be seen from the central glass window of the liquid viewing mirror, and no bubble can be seen normally. If in continuous operation, bubbles always flow, which indicates that the quantity of the refrigerant in the refrigerating system is insufficient, whether the color of the refrigerant in the system turns yellow or not can be observed through a glass window, and the amount of dirt can be judged so as to determine whether to replace the drying filter or not.
In order to facilitate the disassembly and assembly, the components forming the single-stage steam compression refrigeration cycle system are connected by adopting threaded pipelines.
The throttling device is a throttling valve 7 or/and a thermostatic expansion valve 8, and a temperature sensing bulb 18 of the thermostatic expansion valve is arranged at the outlet of the evaporator 9. The concrete connection is as follows: the refrigerant from the outlet of the flow meter 12 flows in two paths, wherein one path is that the outlet of the flow meter 12 is connected with the capillary tube 7 through a manual valve and then enters the coiled evaporator 9 through the manual valve, the other path is that the outlet of the flow meter 12 is connected with the inlet of the thermal expansion valve 8, and the outlet of the thermal expansion valve 8 is connected with the inlet of the coiled evaporator 9. The performance of the refrigerating system in different throttling processes can be researched through two modes, and the influence of the throttling mode on the performance of the refrigerating system is analyzed.
In this embodiment, the condenser 3 is a coil condenser, and the evaporator 9 is a coil evaporator.
The experiment platform is beneficial to the practice operation of students, and the influence of the throttling mode and the refrigerant flow on the performance of the refrigerating system can be researched by adjusting the manual valves on the thermostatic expansion valve branch and the capillary tube branch. The method can be used for artificially simulating the experimental study of the air conditioner faults, such as simulating the fault phenomena of micro-plugging and full-plugging of the drying filter 5 and the capillary 7, and observing and analyzing the generated phenomena. According to the experiment teaching platform, the refrigerating system is a simple refrigerating cycle system, is simple and understandable, and can enable students to enter an experiment state more quickly. And is designed detachably, is convenient to clean and maintain, has small structure and convenient transportation
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 single-stage vapor compression refrigeration system fault simulation and detection practical training experiment platform is characterized by comprising a single-stage vapor compression refrigeration circulation system and an electric control system which are arranged on a practical training platform; the single-stage steam compression refrigeration circulating system consists of a compressor, a condenser, an evaporator, a throttling device, a drying filter and a gas-liquid separator; transparent pipe sections are respectively arranged in the evaporator and the condenser; the air suction end of the compressor is connected with a low-pressure gauge and a low-temperature controller, and the air exhaust end of the compressor is connected with a high-pressure gauge and a high-temperature controller; the outlet of the condenser is connected with the inlet of a flow meter through the dry filter, and the outlet of the flow meter is connected with the inlet of the evaporator through the throttling device; the fans at the condenser and the evaporator are respectively controlled by a fan speed controller; manual valves are respectively arranged at the drying filter and the throttling device; the electric control system comprises a power supply control module, a compressor motor control module and a fan motor control module; a first liquid observation mirror is installed at the inlet of the condenser, and a second liquid observation mirror is installed at the outlet of the gas-liquid separator; and a third liquid sight glass is installed at the inlet of the flowmeter.
2. The single-stage vapor compression refrigeration system fault simulation and detection practical training experimental platform as claimed in claim 1, wherein the throttling device is a throttling valve or/and a thermostatic expansion valve, and a temperature sensing bulb of the thermostatic expansion valve is installed at an outlet of the evaporator.
3. The single-stage vapor compression refrigeration system fault simulation and detection practical training experimental platform as claimed in claim 1 or 2, wherein a refrigeration cycle system of the single-stage vapor compression refrigeration system fault simulation and detection practical training experimental platform studies the performance of the refrigeration system in different throttling processes by two modes of capillary throttling or thermostatic expansion valve throttling, and analyzes the influence of the throttling mode on the performance of the refrigeration system.
CN202010074488.8A 2020-01-22 2020-01-22 Fault simulation and detection practical training experiment platform for single-stage vapor compression refrigeration system Pending CN111179729A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010074488.8A CN111179729A (en) 2020-01-22 2020-01-22 Fault simulation and detection practical training experiment platform for single-stage vapor compression refrigeration system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010074488.8A CN111179729A (en) 2020-01-22 2020-01-22 Fault simulation and detection practical training experiment platform for single-stage vapor compression refrigeration system

Publications (1)

Publication Number Publication Date
CN111179729A true CN111179729A (en) 2020-05-19

Family

ID=70652977

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010074488.8A Pending CN111179729A (en) 2020-01-22 2020-01-22 Fault simulation and detection practical training experiment platform for single-stage vapor compression refrigeration system

Country Status (1)

Country Link
CN (1) CN111179729A (en)

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