Refrigeration and air-conditioning compressors and refrigeration and air-conditioning devices
A technology for compressor and refrigerating machine oil, used in compressors, irreversible cycle compressors, refrigerators, etc., can solve the problems of insufficient long-term reliability of refrigeration and air-conditioning cycle efficiency, insufficient compatibility, etc., to ensure long-term reliability. , to ensure the effect of oil return characteristics
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1～14 and comparative example 1～11）
[0071] (Refrigerator Oil Components)
[0072] Compatibility of the refrigerant and refrigerating machine oil sealed in the compressor for refrigerating and air-conditioning, as mentioned above, ensures the compression by the amount of oil returned from the refrigerating cycle to the compressor (ensuring the amount of oil inside the compressor) or the reduction in heat exchange efficiency. Considering the reliability of the machine, it is one of the important characteristics.
[0073] Compatibility evaluation between difluoromethane and refrigerating machine oil was measured in accordance with Japanese Industrial Standard No. JISK2211.
[0074] Mix an arbitrary amount of oil (refrigerator oil) and refrigerant, seal the prepared mixture in a pressure-resistant glass container, and observe the contents while changing the temperature. If the content is cloudy white, it is judged as two-layer separation, and when it is transparent, it is judged as dissolved.
[0075] Generally, t...
Embodiment 15～17 and comparative example 12～16）
[0113] Refrigerator oil suitable for compressors used in refrigeration and air conditioners requires thermochemical stability, electrical insulation, and lubricity in addition to compatibility with refrigerants. Thermochemical stability, especially in the case of polyol ester oil, hydrolyzability becomes a problem. Volume resistivity was measured as electrical insulation. For lubricity, wear resistance was evaluated using a Falex tester. The evaluation method is as follows.
[0114]
[0115] The hydrolysis test method is as follows. Refrigerant (difluoromethane) and refrigerating machine oil were sealed at 0.5 g / 3 ml in a glass ampoule tube with an outer diameter of 13 mm and an inner diameter of 8 mm, and a sealed tube test was performed. The moisture in the oil is adjusted to 1000ppm, and the copper, iron, and aluminum wires ground by sandpaper are used as catalysts, and the oil heated at 150°C for 21 days is titrated with 1 / 10N-KOH aqueous solution (isopropanol) to obt...
Embodiment 18～21 and comparative example 17～18）
[0129] figure 1 A schematic diagram of a room air conditioner for heating and cooling used in this embodiment is shown.
[0130] The indoor air conditioner 50 is composed of an indoor unit 51 and an outdoor unit 52 .
[0131] The indoor unit 51 incorporates the indoor heat exchanger 5 . Moreover, the compressor 1, the four-way valve 2, the outdoor heat exchanger 3, and the expansion device 4 (expansion part) are built in the outdoor unit 52. The compressor 1 includes a refrigerant compression unit having a sliding unit.
[0132] During indoor cooling, the high-temperature and high-pressure refrigerant gas that is thermally insulated and compressed by the compressor 1 passes through the jet pump and the four-way valve 2, and is cooled by the outdoor heat exchanger 3 (used as a condensing device) to form a high-pressure liquid refrigerant . The refrigerant expands through the expansion device 4 (such as a capillary tube and a temperature expansion valve, etc.) to form a low-...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More