Precautions for Using Air Source Heat Pumps

There are more and more winter heating equipment, which are widely used in coal to electricity projects due to their environmentally friendly and energy-saving characteristics. However, the installation and use of air source heat pump are subject to controversy over both installation and usage costs. Regarding the application of air energy heat pumps, what aspects should we pay attention to?

What are the installation location requirements for air source heat pump units?

The principle of air to water heat pump heating is to use the heat pump host to absorb the heat in the air for underfloor heating. Specifically, the fins of the heat pump host absorb the low-temperature heat in the air, which is vaporized by the evaporator, compressed into high-pressure gas by the low-temperature driven compressor, and then liquefied by the condenser to transfer the absorbed heat to water. This process is repeated, continuously absorbing low-temperature heat from the air, Then, it is released into the room through the transfer of water, in order to achieve the required temperature of the room.

air to water heat pump are also affected by environmental temperature. The higher the environmental temperature, the more heat they can absorb, the better the heating effect, and the lower the energy consumption; On the contrary, the lower the ambient temperature, the less heat can be absorbed, the worse the heating effect, and the higher the energy consumption. Therefore, the host of the air energy heat pump needs to be installed in a place with good air circulation and good lighting position. However, the application of jet enthalpy enhancement technology in air energy heat pumps has made air energy have the biggest characteristic of low temperature resistance, which is different from air conditioning. Low temperature air energy heat pumps can continuously deliver heat to indoor environments at -25 ℃ and consume relatively little electricity. Normal temperature air energy heat pumps can also continuously deliver heat to indoor environments at -5 ℃ while maintaining high energy efficiency and consuming a small amount of electricity.

The heat source pump should not be surrounded by debris, which hinders the circulation of air and can affect the efficiency of heat exchange. Usually, there should be no debris blocking the area within 80 centimeters around the heat pump host, and there should be no obstruction within 2 meters in front of the air outlet. If the upper air outlet heat pump host is installed in the air conditioning unit, a guide cover needs to be added to guide the air outlet of the heat pump host out of the air conditioning unit. In summer, when the air outlet of the heat pump host is blocked by debris, it can cause airflow circulation to be obstructed, heat accumulation, and lead to thermal protection of the heat pump host, affecting the indoor cooling effect; Similarly, during winter heating, when the air outlet of the heat pump host is exposed to cold air, it can accumulate cold air due to debris blocking the surrounding area, which is not conducive to the heat absorption of the heat in the air by the heat pump host, leading to a decrease in thermal efficiency and affecting the indoor heating effect.

How to operate an heat source pump with underfloor heating for the first time?

The temperature of indoor underfloor heating is a slow rising process, usually taking 5-6 hours to reach the temperature. Large units require longer time, and some may take 1-2 days to reach the set temperature. Therefore, when using underfloor heating for the first time, do not set the temperature of the indoor underfloor heating controller too high. If the indoor temperature is set too high, it is easy to cause cracking on the wall or furniture due to rapid temperature changes; Not conducive to the evaporation of water vapor on indoor walls (especially in new houses); Not conducive to heat preservation and consuming more energy. The correct way to use it is to first lower the indoor temperature and then increase it slowly, which will result in lower energy consumption and higher comfort.

How to set the indoor underfloor heating temperature controller?

The start of the air heat pump host needs to be linked with the indoor temperature controller, and of course, the water temperature of the heat pump host needs to be set in advance. The higher the water temperature, the faster the indoor temperature reaches. If the water supply temperature of the air energy heat pump is set to 55 ℃, the water outlet temperature of the heat pump host will be at 55 ℃, and the time to reach 20 ℃ indoors will also be accelerated; If the water supply temperature of the air energy heat pump is set to 35 ℃, the water outlet temperature of the heat pump host will be at 35 ℃, and the time to reach 20 ℃ indoors will also be slower, so the higher the water temperature, the faster the heating time. However, air energy heat pumps can achieve an indoor temperature of 20 ℃ through the control of heating water flow rate and water flow rate in underfloor heating, even under low-temperature water supply conditions, and relatively consume less electrical energy.

How to operate if not used in winter?

The medium with the most internal circulation in an air heat pump is water. How to operate it when it is not used in winter? Although air energy heat pumps can work normally even at temperatures below minus tens of degrees Celsius, the water in the pipes can become a hidden danger when not in use in winter. If the external temperature is below 0 ℃, there is a risk of water freezing in the pipes. If the unit is not at home for a short period of time, it is necessary to shut down the unit, but it cannot be powered off. The air energy heat pump has an independent antifreeze protection function, and if the temperature is too low, the main engine will automatically start circulation to protect the pipes from freezing.

When the winter environment remains below 0 ℃, if there is no one at home for a short period of time, the unit temperature can be set to the lowest value to keep the system running at low temperatures and reduce energy consumption; If there is no one at home for a long time, all the water in the system can be drained to reduce the possibility of icing. However, in areas with winter temperatures above 0 ℃ in the south, underfloor heating water can be omitted and antifreeze can be added to prevent icing. Pay attention to the discharge of defrosting water during use to ensure that the drainage pipeline does not freeze and remains unobstructed. Regularly inspect the drainage position and remove ice residue.

Analysis of the reasons why the temperature of underfloor heating rises slowly or cannot rise?

If the floor heat pump system is designed and constructed according to the construction requirements, there are three reasons for the slow or persistent rise in underfloor heating temperature: ① Excessive humidity. The humidity in the new house is relatively high, and the old house may also experience excessive humidity due to prolonged exposure to high humidity. As a result, the walls or furniture store a lot of water, and the underfloor heating will take more time and consume more heat to dry this moisture, This is also one of the reasons why underfloor heating takes a long time to start up for the first time every year; ② The insulation is too poor. In contrast, houses in the north pay more attention to insulation effects. In the south, many houses also remove indoor insulation materials in order to increase the housing area, which causes significant heat loss to the building. Some households use window glass with poor insulation, and some people are accustomed to opening windows for ventilation, resulting in significant heat loss in the room, which cannot meet the needs of the room for a long time Switching habits require a certain amount of time for the room to reach the required temperature for underfloor heating. When the room temperature reaches, the system will enter a state of insulation and maintenance. When the temperature drops, it will heat up and pause. If the heating system is turned off after the temperature reaches, there will be no more heat to quickly replenish the consumed heat, and the heat inside the room and on the ground will be lost and cooled down, At this point, turning on the heating equipment again requires more heat to heat the ground. Only when the ground temperature is saturated can more heat be transferred, which leads to slower and more energy consumption of floor heat pump.

The most practical energy-saving method?

Many regions now have peak and valley time of use electricity pricing policies, with high electricity prices during the day and low electricity prices at night. Some people, in order to save electricity costs, only use air energy heat pumps for heating when the temperature is low at night, turn off the air energy heat pump host during the day, and rely on nighttime heat storage to maintain the temperature of the room. Although this can save some electricity costs, it also brings hidden dangers and high energy consumption problems. The thermal storage of underfloor heating only has a few hours of insulation time without continuous heating. If the ambient temperature is very low, cutting off the power supply of the air energy heat pump host rashly can easily cause the heat pump host and pipelines to freeze, making it difficult for the system to operate and also prone to freezing and damaging the heat pump host. Of course, the stored heat at night is depleted during the day, and when heating the underfloor heating again at night, the temperature difference between heating the floor heat pump is greater, the ambient temperature at night is also lower, more electricity is consumed, and the time for underfloor heating to reach it is also longer. Therefore, using air energy heat pumps for heating in winter is a continuous process. Do not turn on or off, as the temperature of the room stabilizes, the frequency of starting the heat pump host will also decrease, and the amount of electricity consumed will also decrease.

The installation of cold climate air source heat pump heating is a system engineering project that requires professional designers and installation teams to design and install according to the actual situation. When using it, attention should also be paid to some methods of use. Of course, the current technology of air energy heat pump heating is relatively mature, with characteristics such as stability, comfort, energy conservation, efficiency, environmental protection, long service life, and wide adaptability to different regions. It plays a significant role in the project.

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