【 Weak current College 】 air source heat pump unit of frosting maintenance---Power By 【 China power house network 】

First, understand the frosting icing will give heat pump performance adversely affects what? roughly have the following five conditions:

1. plug the fin between channel and increase air flow resistance;

2. increase the thermal resistance of the heat exchanger, heat transfer ability decreases;

3. frequent defrosting, defrosting, defrosting process is an air conditioner is running, not only does the hot water system, which requires the consumption of energy consumption of hot water, exhaust and returned to rushing cold water to warm water tank, resulting in a further decline in water temperature;

4. evaporating temperature drop, lower the energy-efficiency ratio, the deterioration of heat pump operation performance, until it doesn't work.

5. the unit does not work to the customer directly caused economic losses until the generation of heat pump products for turning back emotional impact of their consumption choices,.

Investigation of the thermal pump frosting, not beyond the normal and abnormal two States. First, the normal frosting, when winter outdoor temperature is below 0 ° c and heating long-running, outdoor unit entire heat exchanger surface frosting uniform, this is a normal phenomenon. Reason: heat exchanger temperature below the dew point temperature of ambient air, the entire heat exchangers heat sink surface produces condensation water, when the ambient air temperature is below 0 ° c, dew water will condense into thin cream. Of course when the frosting seriously affect machine heating effect. General heat pump products are automatic cream, ensure units correctly. Second, irregular frosting, this is causing heat pump operation breakdown, in General, which also includes three phenomena:

1. outdoor environmental temperature is greater than 0 ℃, post soon, the entire heat exchanger on the heat sink surface condensation water will condense into thin Frost, Frost, the more quickly and more thick. knots Indoor thermal effects, mechanism and render the frequent defrosting. The failure typically outdoor heat exchangers heat sink surface dirt plugging, outdoor fan system failure or outdoor heat exchanger into, outlet has blocked withan.

Solution: the outdoor heat exchanger cleaning, inspection fan system or exclude input, outlet of the barrier.

2. outdoor environmental temperature is greater than 0 ℃, post soon, outdoor side bottom heat exchanger (capillary exit heat exchanger imported at the beginning) is a thick frost, heat exchanger no condensation of water for most of the time-delay frosting, frosting from bottom to top; the extension of the Interior fan is always run against the cold wind speed; air conditioners frequent defrosting. The failure typically system lacks the refrigerant.

Solution: first check system leakage point repair, combined with the refrigerant.

3. outdoor environmental temperature is greater than 0 ℃ to post soon. Outdoor side heat exchanger in the upper section (exchanger outlet and return gas pipe) is a thick frost, and heat exchangers with time delay top (with heat exchanger for export to the heat exchanger imported) frost in the extension; and the heating effect of the difference; air conditioners frequent defrosting. The fault is generally too much refrigerant system. Failure often appear in the maintenance after adding refrigerant.

Workaround: drop the refrigerant to function properly.

Users in the choice of air-source heat pump selection should be considered more strength, quality brand. In some northern minus 15 degrees centigrade following this many big brands can't stand the test environment, PHNIX air-source heat pump will not only meet the user's normal use hot water demand and stable operation, so the test in the snowstorm.