CN103471776B - A kind of for the nitrogen gas recovering apparatus after refrigeration system pressurize leak detection and method - Google Patents
A kind of for the nitrogen gas recovering apparatus after refrigeration system pressurize leak detection and method Download PDFInfo
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- CN103471776B CN103471776B CN201310456988.8A CN201310456988A CN103471776B CN 103471776 B CN103471776 B CN 103471776B CN 201310456988 A CN201310456988 A CN 201310456988A CN 103471776 B CN103471776 B CN 103471776B
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Abstract
The present invention relates to a kind of for the nitrogen gas recovering apparatus after refrigeration system pressurize leak detection and method, nitrogen recycling method of the present invention be in refrigeration system after pressurize completes, nitrogen in its pipeline is put in another refrigeration system to be hunted leak by nitrogen recycling tubes rows, when completing the pressure in the refrigeration system of leak detection lower than 0.1MPa, asepwirator pump quits work, complete the recovery of nitrogen, and pull down described flexible pipe.The nitrogen completed in the refrigeration system of leak detection is directly filled in refrigeration system next to be checked by the present invention, achieve the recycling to nitrogen after pressurize leak detection, avoid the waste of nitrogen, and refrigeration system that can be directly to be checked to the next one while nitrogen recycling carries out pressurize, improves work efficiency.
Description
Technical field
The present invention relates to field of refrigeration, be specifically related to a kind of for the nitrogen gas recovering apparatus after refrigeration system pressurize leak detection and method.
Background technology
In the production run of refrigeration system, Leak Detection must be carried out, to guarantee its quality, because the temperature of liquid nitrogen is low, produce easily, and cost is low, pollution-free, therefore, a lot of enterprise is in the production run of refrigeration system, all adopt to fill nitrogen pressurize leak detecting and hunt leak to refrigeration system, leak detection terminate rear directly by nitrogen discharge in surrounding air, do not recycle, produce tens machines every day, a large amount of nitrogen is caused to waste, and nitrogen is directly emitted on around production line, although nitrogen itself is very little to the harm of human body, but when concentration raises, when causing that in air, oxygen concentration drops to below 19.5%, the environment of anoxic can be formed, produce smothering action, likely cause personal injury.Therefore, in the leak detection process of refrigeration system, must recycle the nitrogen of discharge, improve the utilization factor of nitrogen, avoid the wasting of resources.
Summary of the invention
The pressurize leakage detection apparatus that the object of the invention is to solve existing refrigeration system does not carry out nitrogen recycling, directly by nitrogen discharge in air, waste resource problem.
For achieving the above object, the solution of the present invention is: a kind of for the nitrogen recycling method after refrigeration system pressurize leak detection, step is as follows:
(1) be connected respectively by flexible pipe and refrigeration system to be checked and the refrigeration system that completed leak detection by nitrogen gas recovering apparatus, the nitrogen completed in the refrigeration system of leak detection discharges to refrigeration system to be checked voluntarily;
(2) when the pressure of two refrigeration systems reaches balance, by asepwirator pump by the nitrogen discharge that completes in the refrigeration system of leak detection to refrigeration system to be checked;
(3) when completing the pressure in the refrigeration system of leak detection lower than 0.1MPa, asepwirator pump quits work, and completes the recovery of nitrogen, and pulls down described flexible pipe.
The present invention also provides a kind of for the nitrogen gas recovering apparatus after refrigeration system pressurize leak detection, comprise asepwirator pump, non-return valve, drain tap, solenoid valve and control device, the bleeding point of described asepwirator pump is used for and examines refrigeration system compressor and be communicated with, its exhausr port is communicated with the on the suction side of described non-return valve, and the outlet side of non-return valve is used for being communicated with refrigeration system to be checked by described solenoid valve;
The air intake opening of described drain tap is used for by pipeline and surveys refrigeration system compressor and is communicated with, its gas outlet by described solenoid valve for being communicated with refrigeration system to be checked;
Described control device is electrically connected with described solenoid valve and asepwirator pump respectively, for the break-make of Controlling solenoid valve and the start and stop of asepwirator pump.
Described control device is a pressure switch, after the normally opened contact of described pressure switch is connected in series with described boost electromagnetic valve, is connected to the two ends of power supply; After its normally closed contact is connected in series with the starting switch of described asepwirator pump, be connected to the two ends of described power supply.
Described drain tap is manually-operated gate.
The beneficial effect that the present invention reaches: nitrogen gas recovering apparatus of the present invention can after completing pressurize leak detection, the nitrogen be filled with in refrigeration system is reclaimed, avoid the waste of nitrogen, and this device is directly recovered to by the nitrogen completed in the refrigeration system of leak detection in next one refrigeration system to be hunted leak, while nitrogen carries out reclaiming, nitrogen pressurize is filled to next refrigeration system, saves the time, improve work efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of nitrogen gas recovering apparatus of the present invention;
Fig. 2 is control device schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
The present invention is used for the nitrogen gas recovering apparatus embodiment after refrigeration system pressurize leak detection:
Nitrogen gas recovering apparatus of the present invention comprises asepwirator pump, non-return valve, drain tap, solenoid valve and control device, the bleeding point of described asepwirator pump is used for and examines refrigeration system compressor and be communicated with, its exhausr port is communicated with the on the suction side of described non-return valve, and the outlet side of non-return valve is used for being communicated with refrigeration system to be checked by described solenoid valve; The air intake opening of described drain tap is used for by pipeline and examines refrigeration system compressor and is communicated with, its gas outlet by described solenoid valve for being communicated with refrigeration system to be checked; Described control device is electrically connected with described solenoid valve and asepwirator pump respectively, for the break-make of Controlling solenoid valve and the start and stop of asepwirator pump.
As shown in Figure 1, the direction of arrow represents the flow direction of nitrogen, the refrigeration system that refrigeration system to be checked is namely to be hunted leak, examined the refrigeration system that namely refrigeration system has completed leak detection, in the present embodiment, drain tap is manually-operated gate, in other embodiments, electrically operated valve can also be adopted
As shown in Figure 2, in the present embodiment, control device can be configured to a pressure switch KA, after the normally opened contact of pressure switch is connected in series with boost electromagnetic valve, is connected to the two ends of power supply, after its normally closed contact is connected in series with asepwirator pump, is connected to the two ends of power supply.This pressure switch can control the break-make of asepwirator pump and solenoid valve, complete the refrigeration system of leak detection and refrigeration system to be checked and the pipeline be connected between leakage detection apparatus be provided with a tensimeter, being respectively used to test refrigeration system to be checked and the pressure completed in the refrigeration system piping of leak detection.When the piping pressure of refrigeration system does not reach preset pressure, pressure switch is failure to actuate, its normally opened contact keeps the state opened, normally closed contact is kept closed, then boost electromagnetic valve is dead electricity conducting state, asepwirator pump is also in "on" position, if now open drain tap, gas exhaust piping is connected, nitrogen can flow to refrigeration system to be checked from the refrigeration system completing leak detection, if open asepwirator pump starting switch, then asepwirator pump work, the nitrogen completed in the refrigeration system of leaking hunting can by tubes rows to refrigeration system to be checked.If when the pressure in refrigeration system piping reaches preset pressure, then pressure switch action, its normally opened contact closes, and normally closed contact can disconnect, and so boost electromagnetic valve can obtain electric disconnection, and asepwirator pump also can power-off.
When refrigeration system completes leak detection, this nitrogen gas recovering apparatus is connected between the refrigeration system that completes leak detection and next one refrigeration system to be hunted leak by flexible pipe, first drain tap is opened, by the nitrogen discharge that completes in the refrigeration system of leak detection in refrigeration system to be hunted leak, when the pressure in two refrigeration systems reaches balance, by asepwirator pump, the nitrogen completed in the refrigeration system of leak detection is discharged in refrigeration system to be hunted leak, when completing the pressure in the refrigeration system of leak detection and being less than 0.1MPa, asepwirator pump quits work, complete the recycling to nitrogen, the principle of work of asepwirator pump belongs to the common practise of those skilled in the art, what in refrigeration system pipeline, be filled with that nitrogen also belongs to those skilled in the art knows technology, all repeat no more at this.
Nitrogen recycling embodiment of the method for the present invention:
The step of the inventive method is as follows:
(1) nitrogen gas recovering apparatus connected refrigeration system to be checked respectively by flexible pipe and examined refrigeration system, the nitrogen completed in the refrigeration system of leak detection discharges to refrigeration system to be checked voluntarily;
(2) when the pressure of two refrigeration systems reaches balance, by asepwirator pump by the nitrogen discharge that completes in the refrigeration system of leak detection to refrigeration system to be checked;
(3) when completing the pressure in the refrigeration system of leak detection lower than 0.1MPa, asepwirator pump quits work, and completes the recovery of nitrogen, and pulls down described flexible pipe.
Nitrogen gas recovering apparatus of the present invention and method can after refrigeration system complete pressurize leak detection, the nitrogen be filled with in refrigeration system is reclaimed, avoid the waste of nitrogen, and the nitrogen completed in the refrigeration system of leak detection is directly discharged in next one refrigeration system to be hunted leak, while nitrogen carries out reclaiming, nitrogen pressurize is filled to next refrigeration system, saves the time, improve work efficiency.
Claims (4)
1. one kind for refrigeration system pressurize leak detection after nitrogen recycling method, it is characterized in that, the nitrogen gas recovering apparatus that described nitrogen recycling method adopts comprises asepwirator pump, non-return valve, drain tap, solenoid valve and control device, the bleeding point of described asepwirator pump is used for and examines refrigeration system compressor and be communicated with, its exhausr port is communicated with the on the suction side of described non-return valve, and the outlet side of non-return valve is used for being communicated with refrigeration system to be checked by described solenoid valve; The air intake opening of described drain tap is used for by pipeline and surveys refrigeration system compressor and is communicated with, its gas outlet by described solenoid valve for being communicated with refrigeration system to be checked; Described control device is electrically connected with described solenoid valve and asepwirator pump respectively, for the break-make of Controlling solenoid valve and the start and stop of asepwirator pump;
The step of described nitrogen recycling method is as follows:
(1) be connected respectively by flexible pipe and refrigeration system to be checked and the refrigeration system that completed leak detection by nitrogen gas recovering apparatus, open drain tap, the nitrogen completed in the refrigeration system of leak detection discharges to refrigeration system to be checked voluntarily;
(2) when the pressure of two refrigeration systems reaches balance, by the conducting of control device Controlling solenoid valve dead electricity, asepwirator pump work, asepwirator pump by the nitrogen discharge that completes in the refrigeration system of leak detection to refrigeration system to be checked;
(3) when completing the pressure in the refrigeration system of leak detection lower than 0.1MPa, control device Controlling solenoid valve obtains electric disconnection, and asepwirator pump quits work, and completes the recovery of nitrogen, and pulls down described flexible pipe.
2. one kind for refrigeration system pressurize leak detection after nitrogen gas recovering apparatus, it is characterized in that, comprise asepwirator pump, non-return valve, drain tap, solenoid valve and control device, the bleeding point of described asepwirator pump is used for and examines refrigeration system compressor and be communicated with, its exhausr port is communicated with the on the suction side of described non-return valve, and the outlet side of non-return valve is used for being communicated with refrigeration system to be checked by described solenoid valve;
The air intake opening of described drain tap is used for by pipeline and surveys refrigeration system compressor and is communicated with, its gas outlet by described solenoid valve for being communicated with refrigeration system to be checked;
Described control device is electrically connected with described solenoid valve and asepwirator pump respectively, for the break-make of Controlling solenoid valve and the start and stop of asepwirator pump.
3. according to claim 2 for the nitrogen gas recovering apparatus after refrigeration system pressurize leak detection, it is characterized in that, described control device is a pressure switch, after the normally opened contact of described pressure switch is connected in series with described solenoid valve, is connected to the two ends of power supply; After its normally closed contact is connected in series with the starting switch of described asepwirator pump, be connected to the two ends of described power supply.
4. according to claim 2 for the nitrogen gas recovering apparatus after refrigeration system pressurize leak detection, it is characterized in that, described drain tap is manually-operated gate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310456988.8A CN103471776B (en) | 2013-09-29 | 2013-09-29 | A kind of for the nitrogen gas recovering apparatus after refrigeration system pressurize leak detection and method |
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| CN201310456988.8A CN103471776B (en) | 2013-09-29 | 2013-09-29 | A kind of for the nitrogen gas recovering apparatus after refrigeration system pressurize leak detection and method |
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| CN103471776B true CN103471776B (en) | 2016-03-30 |
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| CN104062076B (en) * | 2014-06-24 | 2016-06-01 | 江苏天舒电器有限公司 | A kind of heat pump-unit cooler fills nitrogen pressurize leak detection equipment and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2049329U (en) * | 1989-04-19 | 1989-12-13 | 华磊 | Gas mixture filler for chase leaks |
| GB2454879A (en) * | 2007-11-20 | 2009-05-27 | Vulkan Ind Ltd | Leakage test for refrigerant carrying pipe. |
| CN101558271A (en) * | 2006-11-06 | 2009-10-14 | 沃尔坎洛克林管接头有限及两合公司 | Leakage test in an air conditioner |
| CN201417054Y (en) * | 2009-04-27 | 2010-03-03 | 赵德泉 | Refrigerant recovery device |
| CN102338685A (en) * | 2011-05-18 | 2012-02-01 | 大连理工大学 | Airtightness test device and method for pressure container |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6851316B2 (en) * | 2003-01-27 | 2005-02-08 | The Boc Group, Inc. | Apparatus and method for recovery and recycle of tracer gas from leak testing process with randomly varying demand |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2049329U (en) * | 1989-04-19 | 1989-12-13 | 华磊 | Gas mixture filler for chase leaks |
| CN101558271A (en) * | 2006-11-06 | 2009-10-14 | 沃尔坎洛克林管接头有限及两合公司 | Leakage test in an air conditioner |
| GB2454879A (en) * | 2007-11-20 | 2009-05-27 | Vulkan Ind Ltd | Leakage test for refrigerant carrying pipe. |
| CN201417054Y (en) * | 2009-04-27 | 2010-03-03 | 赵德泉 | Refrigerant recovery device |
| CN102338685A (en) * | 2011-05-18 | 2012-02-01 | 大连理工大学 | Airtightness test device and method for pressure container |
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