Air Source Heat Pump Hot Water Unit Failure Analysis
Abstract: Looking at the current domestic air source Heat Pump Hot water unit engineering application, most problems are mostly concentrated in the installation less than 1 year, look at it from the water are concentrated in the 10 tons of water within a single or two units for multiple.
Keywords: Application of air-source heat pump water heaters solutions for failure analysis
Look at the current domestic air source heat pump water heaters engineering application, most problems are mostly concentrated in the installation less than 1 year, look at it from the water are concentrated in the 10 tons of water within a single or two multi-units. Main issues, control problems Water tank Design problems, and so numerous. Enough to affect user confidence in the use of air source heat pump, if things continue the promotion of quality products will certainly affect the application. New Energy Co., Ltd. Jinan Rompu air source heat pump water heaters as a professional manufacturer of heat pump is a pioneer in research and development of domestic production and application of one of the manufacturers to consider the overall situation of industrial development, is the present heat pump products prone to bad market Key reasons for the failure and analysis. And proposed solutions for the majority of businesses operating in the care in the future reference. Also called the manufacturer in the production of colleagues up and correct any errors common culture, to avoid the air-source heat pump water heater application of the fall in the hands of a mercenary, so that air source heat pump hot water unit development out of the mire, turn back right track.
Symptoms of a: Set the temperature or the temperature rising slowly fail. However, some engineering unit to run longer than the design time many still can not reach the water temperature, can barely even hot water can not be used directly, the measured temperature is around 40 or lower, the system? Ring pump continuously? Ring, the temperature increase not seen .
Diagnosis of a: Air source heat pump water heaters water temperature is set at between 50 ~ 60 , and occasionally higher than 60 at 65 , the following also belong to the extent permitted only condition may affect the unit running life. Rise in water temperature must be the heat from the outside world. Tank water temperature do not increase when the two sides will be, on the one hand is large or equal to the loss of heat into the heat, when the two are equal, the water temperature constant. Heat loss is also Package Including the two possibilities, one is not enough insulation quality and the natural world too much difference in temperature, heat loss seriously, especially water tank insulation untight seal manhole cover bad or did not do some insulation, external insulation and tank insulation over discontinuous increases the heat loss; other heat loss while the water outflow of cold water up into. This heat loss is found in water tank design, some customers asked for the 24 hours of water in nature, such as traffic larger hotels, such as barber city water customers, cold water rushed into the water tank, hot water ready to use. Air source heat pump water heaters are not problems, if the weather suddenly cold, the heat from the air unit from doubly reduced, while increasing customer usage of hot water, when the heat retained in the tank on the lack of on Table Is difficult for the water temperature increases, even cold water phenomenon.
The other hand, may be host to carry hot refrigerant poor, leading to single? Loop heat exchange in effectively carrying fewer. One possibility is that inappropriate selection of refrigerant, air source heat pump water heaters use the refrigerant different from the traditional Air conditioning Refrigerant, the unique specific physical and chemical stability of the particular, which is the core of one of the heat pump technology. Part of the heat pump refrigerant product on the market do not have this feature, the outside temperature is lower in the case of the phenomenon of emergence is not surprising weakness. Another possibility is that the refrigerant charge plus a small number or part of the leak and become inadequate capacity to carry heat. Regular manufacturer of air source heat pump hot water unit product will increase the refrigerant pressure Quantitatively, the factory has a test-by-station to ensure that the host Compressor In various operating conditions have a more stable working ability. Sampling unit with the approved Test After a single working conditions, to mark certification, manufacture date, number and so on. Product transport, there is not handling the situation according to label, so some leakage of refrigerant lost and fail to get results, we also lead to reach the design temperature of the water temperature.
A prescription: According to our diagnostic analysis should first check to see whether the excessive consumption of water per day, every 1kg increase in water absorption 1Kcal 1 heat equivalent to 1.163 × 10-3KWh, both 1000Kg of water by 1 degree, be absorbed 1.163KWh heat. The formula is: water (tons) × temperature × 1.163 / unit power Kw × COP value design time
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