Introduction of DC inverter Monobloc heat pump for heating and cooling

Heating effect

Defrosting process

Heating effect

Dc frequency conversion air source heat pump can automatically adjust the running frequency of the compressor according to the set water temperature, indoor environment temperature and outdoor environment temperature, and other parameters, so as to achieve an on-demand heat supply, which has a good energy-saving effect compared with the constant speed system. The heat pump supply water temperature is relatively stable except at the time when defrosting occurs, and the corresponding room temperature is relatively stable with small fluctuations, which can achieve a better heating experience. Due to the radiator heating terminal, the water supply temperature is slightly higher (between 40 and 45 ℃), and the indoor temperature is maintained above 20 ℃. The test data show that as long as the system is matched properly, the air source heat pump matching the end of the radiator can achieve a better heating effect. Through the adoption of the air source heat pump system at the end of radiant heating, the trend of the heat pump supply/return water temperature, room temperature, and outdoor relative humidity over time, it can be seen that the outdoor relative humidity ranges from 14% to 49%, and the outdoor ambient temperature ranges from -3.7 to 10.6 ℃. The heat pump supply/return water temperature is not only in the time when defrosting occurs. Other time periods are relatively stable, the corresponding room temperature is relatively stable, and the heating experience effect is better. Due to the use of floor heating radiation end, the water supply temperature is lower than that of the radiator end, the heat pump water supply temperature is between 31.45~40.58 ℃ (except during defrosting), and the indoor temperature is maintained above 21 ℃. That is, the DC inverter monobloc heat pump for heating & cooling can indeed achieve a better heating effect.

Defrosting process

In the defrosting action, because the air source heat pump adopts reverse circulation defrosting, the water supply temperature of the heat pump is reduced to lower than the return water temperature, but after the end of defrosting, the water supply temperature quickly rises to the level before defrosting, and the indoor temperature is stable in the whole defrosting process and basically does not change. When defrosting occurs, the water supply temperature decreases from 39.02 ℃ to 34.14 ℃, and the return water temperature decreases from 36.78 ℃ to 36.64 ℃. After defrosting, as the heat pump water supply temperature increased to 38.55 ℃, the return water temperature decreased to 35.41 ℃ and then increased to a temperature level close to that before defrosting. DC frequency conversion air source heat pump system matching radiator end, if considering the effect of defrosting on indoor temperature can not set buffer tank and can achieve a better heating effect, the main reason is: the defrosting time is short, and the specific heat capacity of water is large. Although the water temperature in the defrosting process decreases somewhat, it still maintains above 34 ℃, and the temperature difference between it and the room temperature of 21 ℃ is 13 ℃, which can still provide heat to the indoor environment. The indoor enclosure structure is better, the wall heat storage is larger.

The relevant information about the DC inverter monobloc heat pump for heating & cooling is roughly the same.

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