Device for measuring whether leaked hydrocarbon refrigerant reaches lower-explosive limit or not for home appliances

A technology for hydrocarbons and household appliances, which is applied to measuring devices, material explosives, instruments, etc., and can solve problems such as inability to accurately simulate the operating state of refrigerants

Active Publication Date: 2013-05-22
CQC INTIME TESTING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no uniform test method for the explosion limit of flammable refrigerants in the world. At present, the laboratory does not have a systematic measurement method. It only simulates and measures the leakage position of the refrigerant, and cannot accurately simulate the actual operating state of the refrigerant (including temperature and pressure conditions) and the accurate value of the low explosion limit of the flammable gas.

Method used

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  • Device for measuring whether leaked hydrocarbon refrigerant reaches lower-explosive limit or not for home appliances
  • Device for measuring whether leaked hydrocarbon refrigerant reaches lower-explosive limit or not for home appliances
  • Device for measuring whether leaked hydrocarbon refrigerant reaches lower-explosive limit or not for home appliances

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Embodiment

[0023] Example: such as figure 1 As shown, a quality measurement system 5 is placed in the heating box, and the quality measurement system 5 is a three-point weighing measurement structure, which is composed of a tray 8 and three mass sensors 7 fixed below the tray 8, as figure 2 As shown, each mass sensor 7 is 120° apart, and the measurement accuracy is high, and the accuracy is ±0.1g when the mass is 12 kg.

[0024] like image 3 Shown is the refrigerant temperature and flow control system 2, which adopts an external storage pipeline mechanism and is covered with an insulation layer. It includes a temperature sensor 9 placed in the gas pipeline near the outlet of the refrigerant tank, and an input pressure detection gauge 10 is installed. To detect the refrigerant pressure, the solenoid valve 11 is used to control the refrigerant output, and the input pressure detection gauge 10, the output pressure detection gauge 12 and the solenoid valve 11 are placed externally in orde...

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Abstract

The invention discloses a device for measuring whether leaked hydrocarbon refrigerant reaches lower-explosive limit or not for home appliances. The device comprises a hydrocarbon refrigerant concentration measuring system, a refrigerant temperature and flow control system and a quality measuring system. The device is characterized by further comprising a box body temperature control system and an external thermal insulation layer, the influence of the hot-air convection to the quality measuring system can be reduced due to the design, the refrigerant temperature and flow control system adopts an external storage pipeline mechanism, the quality measuring system adopts a three-point weighing and measuring structure, and a concentration measuring sensor of the hydrocarbon refrigerant concentration measuring system is externally arranged; and the device is mainly used for the measuring whether the leaked hydrocarbon refrigerant reaches the lower-explosive limit or not for the refrigerator and the air conditioner, is controlled by a PLC (programmable logic controller), has the functions of refrigerant heating and releasing controlling, concentration measuring, and alarming when the leaked hydrocarbon refrigerant reaches the explosive limit, and has a first-stage alarm function and a second-stage alarm function when the leaked hydrocarbon refrigerant reaches the explosive limit.

Description

technical field [0001] The invention relates to a detection device for household electrical appliances, in particular to a method for detecting whether the concentration of hydrocarbon refrigerant leaked in household electrical appliances has reached its low explosion limit. Background technique [0002] In order to protect the environment, according to the 1987 Montreal Proclamation, fluorine-containing refrigerants are gradually replaced by some low-harm and environmentally friendly refrigerants. Hydrocarbons and HFCs are the main research directions for alternative refrigerants. Hydrocarbon alternative refrigeration refrigerants mainly include: propane (R-290) and isobutane (R-600a). Propane and isobutane have low toxicity, good performance, no ODP value and low GWP value. Hydrocarbons are currently widely used in small household appliances, such as refrigerators, air conditioners and other refrigeration appliances, due to their natural environmental protection and excell...

Claims

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Application Information

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IPC IPC(8): G01N33/00G01N25/54
Inventor 杨宗辉蒋应龙扈罗全施亚申
Owner CQC INTIME TESTING TECH CO LTD
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