CN110849049B - Automatic timing blowing liquid-returning device for machine set shutdown - Google Patents

Automatic timing blowing liquid-returning device for machine set shutdown Download PDF

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Publication number
CN110849049B
CN110849049B CN201911188136.9A CN201911188136A CN110849049B CN 110849049 B CN110849049 B CN 110849049B CN 201911188136 A CN201911188136 A CN 201911188136A CN 110849049 B CN110849049 B CN 110849049B
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China
Prior art keywords
intermediate relay
switch
unit
pipeline
relay
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CN201911188136.9A
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Chinese (zh)
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CN110849049A (en
Inventor
周定山
江再宽
王振强
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Suzhou Aode High End Equipment Co ltd
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Suzhou Aode High End Equipment Co ltd
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B45/00—Arrangements for charging or discharging refrigerant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/003—Filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an automatic timing blowing liquid returning device for machine unit shutdown, which comprises a refrigerating machine unit, a test box and a water returning box, wherein the output end of the refrigerating machine unit is connected with the liquid inlet of the test box through a liquid inlet pipeline, the liquid outlet of the test box is connected with the input end of the refrigerating machine unit through a liquid outlet pipeline, the air inlet of the test box is connected with an air inlet pipeline, the air inlet pipeline is connected with an external compressed air source, a first electromagnetic valve is arranged on the air inlet pipeline, the air outlet of the test box is connected with the water returning box through an air outlet pipeline, a second electromagnetic valve is arranged on the air outlet pipeline, and a main circuit relay is arranged in the refrigerating machine unit.

Description

Automatic timing blowing liquid-returning device for machine set shutdown
Technical Field
The invention relates to the technical field of refrigerating units for testing industry, in particular to an automatic timing blowing liquid returning device for unit shutdown.
Background
In the pilot test industry, it is often necessary to blow cooling medium from the equipment after testing back into the unit medium box. When the test is over, there are generally two ways in which the medium needs to be blown back into the medium tank. The first method is to adopt a button switch to manually select to blow and return liquid; the second way is to use PLC control. The first method has the advantages that after the test is finished, the machine is shut down, the air blowing backwater operation is manually carried out, and the air blowing time period and time are controlled by people, so that the machine is flexible; the first approach has the disadvantage that manual selection is required for each test completion, which is labor-consuming, time-consuming, and time-controlling imprecision. The second method has the advantages that PLC control is adopted, manual operation is not needed, and accurate control can be achieved; the second method has the defects of increased electrical control cost and resource waste due to the adoption of PLC control.
Disclosure of Invention
The invention aims to provide an automatic timing blowing liquid returning device for machine unit shutdown, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The utility model provides a unit shut down automatic timing liquid device that blows, includes refrigerating unit, test box and return water tank, refrigerating unit's output is connected with the inlet of test box through the feed liquor pipeline, the liquid outlet of test box is connected with refrigerating unit's input through the drain line, the air inlet of test box is connected with the admission line, the admission line is connected with external compressed air source, install first solenoid valve on the admission line, the gas outlet of test box is connected with the return water tank through the gas outlet pipeline, install the second solenoid valve on the gas outlet pipeline, refrigerating unit inside is provided with main circuit relay, first solenoid valve and second solenoid valve are all connected with external control circuit.
Preferably, the liquid inlet pipeline is provided with a first valve.
Preferably, the liquid outlet pipeline is provided with a second valve.
Preferably, a filter screen is arranged in the water return tank, the water return tank is connected with the refrigerating unit through a water return pipeline, and a water return pump is arranged on the water return pipeline.
Preferably, the test box is connected with an overflow pipeline, the overflow pipeline is connected with a liquid outlet pipeline, and a one-way overflow valve is arranged on the overflow pipeline.
Preferably, the control circuit comprises a KA control circuit, a KA control circuit and a solenoid valve control circuit, wherein the KA control circuit comprises a KA intermediate relay, the KA intermediate relay is connected with a first unit operation switch and a first KA intermediate relay control switch in series, the first unit operation switch is connected with a KA intermediate relay power-on switch in parallel, the first unit operation switch is connected with a signal output end of a main circuit relay, the first KA intermediate relay control switch is a normally closed switch, and the first unit operation switch and the KA intermediate relay power-on switch are normally open switches.
Preferably, the KA control circuit comprises a KA intermediate relay, a KT time relay control switch, a KA intermediate relay control switch and a second unit operation switch are connected in series on the KA intermediate relay, a KA intermediate relay energizing switch is connected in parallel on the KA intermediate relay control switch and the second unit operation switch, a signal output end of the main circuit relay is connected with the second unit operation switch, a signal output end of the KA intermediate relay is connected with a first KA intermediate relay control switch, the KA intermediate relay control switch is connected with a signal output end of the KA intermediate relay, the KT time relay control switch and the second unit operation switch are normally closed switches, and the KA intermediate relay control switch and the KA intermediate relay energizing switch are normally open switches.
Preferably, the electromagnetic valve control circuit comprises a KT time relay, the KT time relay is connected with a second KA intermediate relay control switch in series, the KT time relay is connected with the first electromagnetic valve and the second electromagnetic valve in parallel, the second KA intermediate relay control switch is a normally open switch, the signal output end of the KA intermediate relay is connected with the second KA intermediate relay control switch, and the signal output end of the KT time relay is connected with the KT time relay control switch.
Compared with the prior art, the invention has the beneficial effects that: the invention adopts the combination of the unit operation signal and the relay to achieve the requirements of full automation and high precision, realizes the function of automatically blowing and returning liquid according to the shutdown signal of the unit shutdown after the unit shutdown, does not need to consume manpower control, and has lower control cost compared with plc.
Drawings
FIG. 1 is a schematic structural view of an automatic timing blowing liquid-returning device for machine unit shutdown;
FIG. 2 is a schematic diagram of a KA1 control circuit in the automatic timing blowing liquid returning device for machine unit shutdown;
FIG. 3 is a schematic diagram of the KA2 control circuit in the automatic timing blowing liquid-returning device for machine set shutdown;
Fig. 4 is a schematic structural diagram of a solenoid valve control circuit in the automatic timing blowing liquid returning device for machine unit shutdown.
In the figure: the refrigerating unit comprises a 1-refrigerating unit, a 2-test box, a 3-water return tank, a 4-liquid inlet pipeline, a 5-first valve, a 6-liquid outlet pipeline, a 7-second valve, an 8-air inlet pipeline, a 9-first electromagnetic valve, a 10-air outlet pipeline, an 11-second electromagnetic valve, a 12-water return pipeline, a 13-water return pump, a 14-overflow pipeline, a 15-one-way overflow valve, a 16-KA1 intermediate relay, a 17-KA2 intermediate relay, a 18-KT1 time relay, a 19-first unit operation switch, a 20-second unit operation switch, a 21-KA1 intermediate relay power-on switch, a 22-KA1 intermediate relay control switch, a 23-first KA2 intermediate relay control switch, a 24-KA2 intermediate relay power-on switch, a 25-second KA2 intermediate relay control switch and a 26-KT1 time relay control switch.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 4, the present invention provides a technical solution: the automatic timing blowing liquid returning device for machine unit shutdown comprises a refrigerating machine unit 1, a test box 2 and a water returning box 3, wherein the output end of the refrigerating machine unit 1 is connected with the liquid inlet of the test box 2 through a liquid inlet pipeline 4, the liquid outlet of the test box 2 is connected with the input end of the refrigerating machine unit 1 through a liquid outlet pipeline 6, an air inlet of the test box 2 is connected with an air inlet pipeline 8, the air inlet pipeline 8 is connected with an external compressed air source, a first electromagnetic valve 9 is installed on the air inlet pipeline 8, the air outlet of the test box 2 is connected with the water returning box 3 through an air outlet pipeline 10, a second electromagnetic valve 11 is installed on the air outlet pipeline 10, and a main circuit relay is arranged inside the refrigerating machine unit 1, and the main circuit relay, the first electromagnetic valve 9 and the second electromagnetic valve 11 are all connected with an external control circuit.
The liquid inlet pipeline 4 is provided with a first valve 5.
The liquid outlet pipe 6 is provided with a second valve 7.
The filter screen is arranged in the water return tank 3, the water return tank 3 is connected with the refrigerating unit 1 through a water return pipeline 12, and a water return pump 13 is arranged on the water return pipeline 12.
The test box 2 is connected with an overflow pipeline 14, the overflow pipeline 14 is connected with the liquid outlet pipeline 6, and the overflow pipeline 14 is provided with a one-way overflow valve 15.
The control circuit comprises a KA1 control circuit, a KA2 control circuit and a solenoid valve control circuit, wherein the KA1 control circuit comprises a KA1 intermediate relay 16, the KA1 intermediate relay 16 is connected with a first unit operation switch 19 and a first KA2 intermediate relay control switch 23 in series, the first unit operation switch 19 is connected with a KA1 intermediate relay power-on switch 21 in parallel, the first unit operation switch 19 is connected with a signal output end of a main circuit relay, the first KA2 intermediate relay control switch 23 is a normally closed switch, and the first unit operation switch 19 and the KA1 intermediate relay power-on switch 21 are normally open switches.
The KA2 control circuit comprises a KA2 intermediate relay 17, a KT1 time relay control switch 26, a KA1 intermediate relay control switch 22 and a second unit operation switch 20 are connected in series on the KA2 intermediate relay 17, a KA2 intermediate relay electrifying switch 24 is connected in parallel on the KA1 intermediate relay control switch 22 and the second unit operation switch 20, a signal output end of the main circuit relay is connected with the second unit operation switch 20, a signal output end of the KA2 intermediate relay 17 is connected with a first KA2 intermediate relay control switch 23, the KA1 intermediate relay control switch 22 is connected with a signal output end of the KA1 intermediate relay 16, the KT1 time relay control switch 26 and the second unit operation switch 20 are normally closed switches, and the KA1 intermediate relay electrifying switch 22 and the KA2 intermediate relay electrifying switch 24 are normally open switches.
The electromagnetic valve control circuit comprises a KT1 time relay 18, a second KA2 intermediate relay control switch 25 is connected in series with the KT1 time relay 18, the KT1 time relay 18 is connected with the first electromagnetic valve 9 and the second electromagnetic valve 11 in parallel, the second KA2 intermediate relay control switch 25 is a normally open switch, a signal output end of the KA2 intermediate relay 17 is connected with the second KA2 intermediate relay control switch 25, and a signal output end of the KT1 time relay 18 is connected with the KT1 time relay control switch 26.
The working principle of the invention is as follows: during test operation, the refrigerating unit 1 is started, refrigerating fluid is circularly introduced into the test box 2, at the moment, a main circuit relay in the unit is electrified, a first unit operation switch 19 is closed, a second unit operation switch 20 is opened, at the moment, a KA1 intermediate relay 16 is electrified, a KA1 intermediate relay electrifying switch 21 and a KA1 intermediate relay control switch 22 are controlled to be closed, and electrifying self-locking of the KA1 intermediate relay 16 is realized; after the test is finished, the refrigerating unit 1 is powered off, the main circuit relay sends out a signal, the first unit operation switch 19 is disconnected, the second unit operation switch 20 is closed, the KA1 intermediate relay 16 is still powered on at the moment, the KA1 intermediate relay control switch 22 is kept closed, the KA2 intermediate relay 17 is powered on, the first KA2 intermediate relay control switch 23 is controlled to be disconnected, the KA2 intermediate relay power switch 24 is closed, the second KA2 intermediate relay control switch 25 is controlled to be closed, the KA1 intermediate relay 16 is powered off at the moment, the KA1 intermediate relay power switch 21 and the KA1 intermediate relay control switch 22 are controlled to be disconnected, the KA2 intermediate relay 17 is powered on and self-locking is realized, the first electromagnetic valve 9 and the second electromagnetic valve 11 are opened, air is blown into the test box, liquid flows back into the water return box 3, meanwhile, the KT1 time relay 18 is powered on, after a period of time, the KA1 time relay control switch 26 is controlled to be disconnected, the KA2 intermediate relay 17 is powered off, the corresponding reset is carried out, the first electromagnetic valve 9 and the second electromagnetic valve 11 are powered off, and the blowing process is stopped.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (8)

1. The automatic timing blowing liquid returning device for machine unit shutdown comprises a refrigerating machine unit (1), a test box (2) and a water returning box (3), and is characterized in that: the output of refrigerating unit (1) is connected with the inlet of test box (2) through feed liquor pipeline (4), the liquid outlet of test box (2) is connected with the input of refrigerating unit (1) through drain line (6), the air inlet of test box (2) is connected with air inlet pipe (8), air inlet pipe (8) are connected with external compressed air supply, install first solenoid valve (9) on air inlet pipe (8), the gas outlet of test box (2) is connected with return water tank (3) through air outlet pipe (10), install second solenoid valve (11) on air outlet pipe (10), refrigerating unit (1) inside is provided with main circuit relay, first solenoid valve (9) and second solenoid valve (11) are all connected with external control circuit.
2. The unit shut-down automatic timing blowing liquid return device according to claim 1, wherein: the liquid inlet pipeline (4) is provided with a first valve (5).
3. The unit shut-down automatic timing blowing liquid return device according to claim 1, wherein: the liquid outlet pipeline (6) is provided with a second valve (7).
4. The unit shut-down automatic timing blowing liquid return device according to claim 1, wherein: the water return tank (3) internally provided with a filter screen, the water return tank (3) is connected with the refrigerating unit (1) through a water return pipeline (12), and the water return pipeline (12) is provided with a water return pump (13).
5. The unit shut-down automatic timing blowing liquid return device according to claim 1, wherein: the test box (2) is connected with an overflow pipeline (14), the overflow pipeline (14) is connected with the liquid outlet pipeline (6), and the overflow pipeline (14) is provided with a one-way overflow valve (15).
6. The unit shut-down automatic timing blowing liquid return device according to claim 1, wherein: the control circuit comprises a KA1 control circuit, a KA2 control circuit and a solenoid valve control circuit, wherein the KA1 control circuit comprises a KA1 intermediate relay (16), the KA1 intermediate relay (16) is connected with a first unit operation switch (19) and a first KA2 intermediate relay control switch (23) in series, the first unit operation switch (19) is connected with a KA1 intermediate relay electrifying switch (21) in parallel, the first unit operation switch (19) is connected with a signal output end of a main circuit relay, the first KA2 intermediate relay control switch (23) is a normally closed switch, and the first unit operation switch (19) and the KA1 intermediate relay electrifying switch (21) are normally open switches.
7. The unit shut-down automatic timing blowing liquid return device according to claim 6, wherein: KA2 control circuit includes KA2 intermediate relay (17), it has KT1 time relay control switch (26), KA1 intermediate relay control switch (22), second unit operation switch (20) to establish ties on KA2 intermediate relay (17), KA2 intermediate relay switch (24) have been parallelly connected on KA1 intermediate relay control switch (22), second unit operation switch (20), the signal output part of main circuit relay is connected with second unit operation switch (20), the signal output part of KA2 intermediate relay (17) is connected with first KA2 intermediate relay control switch (23), KA1 intermediate relay control switch (22) are connected with the signal output part of KA1 intermediate relay (16), KT1 time relay control switch (26), second unit operation switch (20) are normally closed switch, KA1 intermediate relay control switch (22), KA2 intermediate relay switch (24) are normally open switch.
8. The unit shut-down automatic timing blowing liquid return device according to claim 7, wherein: the electromagnetic valve control circuit comprises a KT1 time relay (18), a second KA2 intermediate relay control switch (25) is connected in series with the KT1 time relay (18), the KT1 time relay (18) is connected with a first electromagnetic valve (9) and a second electromagnetic valve (11) in parallel, the second KA2 intermediate relay control switch (25) is a normally open switch, a signal output end of the KA2 intermediate relay (17) is connected with the second KA2 intermediate relay control switch (25), and a signal output end of the KT1 time relay (18) is connected with the KT1 time relay control switch (26).
CN201911188136.9A 2019-11-28 2019-11-28 Automatic timing blowing liquid-returning device for machine set shutdown Active CN110849049B (en)

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CN117073277B (en) * 2023-07-19 2026-01-16 杭州长川科技股份有限公司 Cold carrier recovery structure, testing device and temperature control system

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CN204063458U (en) * 2014-10-24 2014-12-31 中国扬子集团滁州扬子空调器有限公司 A kind of recuperation of heat control circuit being applied to air-conditioner
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