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A leak detection and refrigerant filling device for an automobile air-conditioning system

A technology for automotive air conditioning system and tightness detection, which is applied in the direction of liquid tightness measurement, control/regulation system, and general control system using liquid/vacuum degree. Low work efficiency and other problems, to achieve the effect of comprehensive sealing detection, stable refrigerant filling amount, and improved accuracy

Active Publication Date: 2018-12-07
ZHEJIANG JINGANG AUTOMOBILE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this utility model is that if it is used for the detection of the sealing of automobile air conditioners, although the detection process can be realized, after the detection is completed, it is necessary to refill the refrigerant, and in these two processes, pipelines are required. The conversion of interfaces and devices will easily lead to the re-entry of air in the original vacuumed automobile air conditioning system pipeline, thus affecting the filling amount of refrigerant
And the two processes are carried out separately, resulting in a low degree of functional integration of each working part and low work efficiency

Method used

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  • A leak detection and refrigerant filling device for an automobile air-conditioning system
  • A leak detection and refrigerant filling device for an automobile air-conditioning system

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Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1: as figure 1 In the shown embodiment, a kind of automobile air-conditioning system air-tightness detection and refrigerant filling device, comprises PLC controller 1, the main electromagnetic valve 2 connected with PLC controller, and described main electromagnetic valve has the inner channel of the atmospheric valve , the internal passage of the vacuum valve, the internal passage of the refrigerant inlet valve, the internal passage of the refrigerant charging valve and the valve inner cavity connected with all the valve passages. All the valve passages can be opened and closed. Connect the inner end of an external connection pipe 3, the outer end of the external connection pipe is connected to the atmosphere, the inner passage of the vacuum pumping valve is connected to a vacuum pump 4 through a suction pipeline, and a vacuum pressure sensor 5 is arranged on the suction pipeline. The passage in the refrigerant inlet valve is connected to a refrigerant liqu...

Embodiment 2

[0027] Embodiment 2: the basic structure and implementation mode of this embodiment are the same as embodiment 1, and its difference is, as figure 2 As shown in , the vacuum pump has an on-off vacuum port, an exhaust port, and an air return port. The vacuum port is connected to the inner passage of the vacuum valve, and the exhaust port is connected to the atmosphere when it is opened. , the air return interface is connected to the refrigerant liquid storage tank through the air return pipeline 28, and the air return one-way valve is arranged on the air return pipeline.

[0028] After the refrigerant filling is completed, there will be residual refrigerant in the refrigerant pipeline (from the outlet of the intermediate refrigerant tank to the refrigerant charging adapter). Therefore, before the first refrigerant filling, the amount of refrigerant remaining in the pipeline from the outlet of the intermediate refrigerant tank to the refrigerant adapter can be measured, so that...

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Abstract

The invention discloses an automobile air-conditioning system sealing detection and refrigerant injection device, and aims at providing the automobile air-conditioning system sealing detection and refrigerant injection device which can effectively perform airtightness detection on an automobile air-conditioning system and can directly perform refrigerant injection after completion of detection and is great in functional integration and high in working efficiency. The automobile air-conditioning system sealing detection and refrigerant injection device comprises a PLC and a master electromagnetic valve. The master electromagnetic valve is provided with an atmosphere access in-valve path, a vacuum pumping in-valve path, a refrigerant inlet in-valve path, a refrigerant injection in-valve path and an in-valve cavity which is communicated with all the in-valve paths. The vacuum pumping in-valve path is connected with a vacuum pump through a pumping pipeline. The pumping pipeline is provided with a vacuum pressure sensor. The refrigerant inlet in-valve path is connected with a refrigerant liquid storage tank through a refrigerant inlet system. The refrigerant inlet system comprises a refrigerant inlet pump, a refrigerant flowmeter and a refrigerant inlet non-return valve. The refrigerant injection in-valve path is connected with a refrigerant injection adapter through a refrigerant injection pipeline. The refrigerant injection pipeline is provided with a refrigerant injection pressure gauge.

Description

technical field [0001] The invention belongs to the technical field of automobile air-conditioning systems, and in particular relates to a sealing performance detection and refrigerant filling device of an automobile air-conditioning system. Background technique [0002] Many cars have air-conditioning systems, which include various pipelines, compressors, and refrigerants as media. Before leaving the factory, the automotive air conditioning system needs to add refrigerant. During the process of adding refrigerant, it is necessary to evacuate and vacuum the entire automotive air-conditioning system pipeline first, and the refrigerant can only be added after passing the test. However, at present, before the refrigerant filling of the automobile air-conditioning system, the air tightness test needs to be carried out separately. , It is easy to cause air to enter the pipeline of the automobile air conditioning system that was originally vacuumed, thereby affecting the amount ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/05G01M3/34F17C13/02
CPCF17C13/025G01M3/34G05B19/058G05B2219/163
Inventor 李书涛倪三明张吉
Owner ZHEJIANG JINGANG AUTOMOBILE
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