Main products: Guangxi floor heating installation, Nanning floor heating installation, Guangxi water floor heating, Guangxi solar energy, Nanning air energy
1. Improper use of air filters that accumulate too much dust, and internal and external ventilation vents are blocked by foreign matter. The function of the filter is to absorb dust in the air. If too much dust accumulates and is not cleaned in time, it will block the air circulation, resulting in a reduction in the air output from the air outlet, and the heating heat in the machine cannot be brought out in time by the flowing air, causing Insufficient heating capacity is not a malfunction, it is a maintenance problem of the air conditioner. You only need to remove the air filter and clean it regularly to return to normal. Generally, it is more appropriate to clean the filter once every half month (be careful not to use hot water above ℃ when cleaning) , do not use washing powder, dish soap, gasoline, banana water, etc. to clean the filter to avoid deformation of the filter, and do not use open flames to dry it) The dirt on the evaporator and condenser is too thick, which will reduce the heat exchange effect and lead to a decrease in heating capacity. The heating temperature is set too low, the door cracks and wall holes in the air-conditioned room are not blocked, or the windows and doors are opened frequently, causing indoor heat loss.
2. Environmental factors Heating and cooling air conditioners are divided into three types: heat pump type, heat pump auxiliary electric heating type and electric heating type. Under the condition of equal heating capacity, the power consumption of the first two types is about half less than that of the third type. Taking into account the power supply capacity And electricity costs, now families generally choose the first two types of air conditioners (but attention should be paid to their use conditions, the first two are only suitable for environments above ℃, obviously not applicable to northern regions). For heat pump type air conditioners, when the ambient temperature is too low during heating, the energy efficiency ratio of the air conditioner is also reduced. The heating effect is not ideal in cold winter. This is a normal phenomenon. For heat pump air conditioners without automatic defrost, the lowest ambient temperature used is above zero degrees Celsius. Below this temperature, heating will not occur or the heating effect will be poor. This is because frost accumulation on the external heat exchanger blocks the air flow. , because it can no longer absorb heat from the outside. For heat pump air conditioners with automatic defrost, the lowest ambient temperature it uses is also ℃, and it cannot effectively heat if it is lower than this temperature.
. Four-way valve cross-gas. Heat pump air conditioners use a four-way valve to switch between cooling and heating states. During cooling, the outdoor heat exchanger acts as a condenser, the indoor heat exchanger acts as an evaporator to absorb heat and provide heating, the outdoor heat exchanger acts as an evaporator, and the indoor heat exchanger acts as a condenser to release heat. If the four-way valve crosses the air, part of the refrigerant that should participate in heat exchange will return directly from the compressor outlet pipe to the return pipe at the four-way valve, resulting in less refrigerant participating in heat exchange and a decrease in heat exchange efficiency, causing Insufficient heating capacity. The external manifestations are mainly unstable high and low pressure, uneven cold and heat in the pipes (two hot pipes and two cold pipes connected to the four-way valve), and some faults such as insufficient refrigerant or insufficient cooling and heating. Insufficient, but after testing, the high-pressure side pressure is normal.
.The one-way valve (also known as the check valve) is leaking. The refrigeration cycle system of the heat pump air conditioner is as shown in the attached figure. Due to the huge difference between the cooling and heating states of the heat pump air conditioner, it is often unreliable to only rely on the electromagnetic reversing valve to switch the flow direction of the refrigerant. Therefore, one-way valves are often used In heat pump air conditioners, it is used to switch the flow direction of refrigerant safely and effectively. During the refrigeration cycle, the difference between high and low pressure is small, the throttling element is the main capillary tube, and the auxiliary capillary tube is short-circuited by the one-way valve. During the heating cycle, the one-way valve in parallel with the auxiliary capillary tube is not conducting, and the throttling element is the main capillary tube. Connected in series with the auxiliary capillary, this can increase the resistance of the throttling element. That is to increase the high and low pressure difference of the refrigeration system, lower the temperature of the outdoor heat exchanger, and obtain more heat from the outside to achieve the purpose of heating. When the one-way valve leaks, the pressure difference between the high and low pressures of the refrigeration system drops, the temperature of the outdoor heat exchanger rises, and the heat obtained from the outside decreases, resulting in insufficient heating capacity. When the air conditioner refrigeration is normal and the heating capacity is insufficient, by detecting the pressure during system operation, it will be found that the pressure on the low-pressure side increases and the pressure difference between the high and low pressures decreases.
. Defrost controller fails. When the heat pump air conditioner is in the heating state, the evaporator is located in the outdoor unit. For heat pump air conditioners that use a hot flush defrost device, if the defrost controller fails, the air conditioner cannot be in time. When the air conditioner is switched to defrost operation, frost will appear on the evaporator during heat pump heating, affecting the heat exchange efficiency of the air conditioner, resulting in insufficient heating capacity or even shutdown. At this time, you should focus on observing whether there are the following phenomena: defrost temperature sensing device is misaligned, contacts are stuck or have poor contact, fan impeller is slipping or air duct is blocked, solenoid valve or starting relay is invalid.
. Auxiliary electric heating function fails. Nowadays, heat pump-assisted electric heating air conditioners generally use electric auxiliary heating technology. Electric auxiliary heating technology can quickly heat under ultra-low temperature conditions. It is highly effective, safe and reliable, and can be used for a long time. If there is a fault with the electric auxiliary heating control circuit or the electric auxiliary heating equipment
Nanning Excellent Heat Pump Drying Unit Co., Ltd.