05-17
When it is used in the north, it is inevitable that the equipment will be frosted due to the influence of low temperature weather. I will discuss the harm of equipment frosting and the method to solve the problem. Frosting hazard of air source heat pump: when the air source heat pump unit operates in winter, when the surface temperature of the heat exchanger outside the room is lower than the dew point temperature of the surrounding air and lower than 0 ℃, the surface of the heat exchanger will frost. The formation of frost worsens the heat transfer effect of the heat exchanger and increases the resistance of air flow, reducing the heating capacity of the air source heat pump unit, even stopping the unit when it is serious. Defrosting method of air energy heat pump: 1. Frost sensor method: It is used to control defrosting by detecting the thickness of the frost layer. The principle of this method is simple, but it involves high gain signal amplifiers and expensive sensors. As a test method, it is feasible and economical in practical application. 2. Timing control method: as the name implies, defrosting control is carried out according to the preset time. This method is easy to produce unnecessary defrosting action, resulting in unnecessary waste. 3. Maximum average heating capacity method: for a certain atmospheric temperature, there is a unit with corresponding evaporation temperature, at this time, the average heating capacity of the unit is the largest. The defrosting control is carried out with the maximum heating effect produced by the heat pump unit as the goal. This defrosting method has theoretical significance, but it is difficult to implement. 4. Time temperature method: it means that when the defrosting detection element feels that the surface temperature of the heat exchanger fin tube and the heating time of the heat pump unit reach the set value, the defrosting starts. Because the coil temperature is set as a fixed value, this method can not take into account the changes in ambient temperature and humidity, which is easy to cause wrong operation. Moreover, this method is sensitive to the installation position of the temperature sensor.
05-17
As we all know, the air source heat pump is a new type of environment-friendly water heater that is very energy-saving. When working, 1 kilowatt hour electricity can be used as 4 kilowatt hour electricity. Because the air source water heater uses the water electricity separation technology, which completely separates water from electricity, it is very safe to use the air source water heater, and there is no need to worry about the possibility of electric shock and leakage. What is the meaning of air source heat pump triple supply. Where can I use it? Here we simply popularize the working principle of air source heat pump triple supply. Generally speaking, the three fingers of air source heat pump can be used for three purposes. The first purpose is to be used as an ordinary air source water heater, which means that it has the function of making hot water for domestic bathing. The second function of air source heat pump is to supply heating when the temperature is low in winter. This is similar to the principle of the air conditioner we used before. However, due to the long pipeline of the heating system, it is difficult to drain the water, so as time passes, there will be many bacteria growing in the pipe, and the hot water bath system is required to be very clean when it is used, so it is necessary to separate the heating and hot water bath, and use two different systems, that is, do not let the foreign matter bacteria in the heating system run into the hot water bath. The third function of air source heat pump triple supply is the refrigeration function. The so-called refrigeration is a principle of air conditioning that we are familiar with.
05-17
The air energy water heater, also known as the air energy heat pump, absorbs the low temperature heat in the air. The following explains the installation methods of different types of air energy heat pump: 1、 The air energy heat pump with regular water supply generally selects the air energy host as the circulating type: Calculate the total daily hot water consumption, match the corresponding host and water tank, and install circulating pipes on the water tank and air energy heat pump for circulating heating; Then add cold water after the hot water is used up in a certain period of time, or when the water level is lower than a certain stage, and reheat. The energy efficiency ratio of circulating air energy heat pump water heater is relatively high. It is recommended to use this method in general factories, schools and other units where the water consumption time is concentrated. 2、 The installation type of air energy heat pump for all day water supply can be selected: direct heating, circulating, large and small water tank mode, etc 1.Direct heating type: refers to that the hot water of cold water can be used directly after being heated by the air energy heat pump host, and the outlet water temperature can reach about 55 ℃ (thermostat). The principle of direct heating type is to control the amount of make-up water through a throttling device. The water flow cannot fill the whole heat exchanger. Therefore, when making a direct heating air source heat pump, the pipe diameter of the heat exchanger should not be too large, and the most reasonable pipe diameter and water flow mode should be selected. 2. Circulating type: the air energy heat pump heats the water in the water tank by circulating heating. When a part of the water in the water tank is used, the water tank is replenished and then recycled to the required temperature. This installation mode is relatively simple and common. 3. Large and small water tanks: the heat pump host first heats a small water tank to the set temperature, then supplies all the water from the water tank to the large water tank, and then heats the small water tank with make-up cold water, continuously circulating until the large water tank is filled with hot water. This method is relatively complex in terms of control, but it does not appear that the circulating air energy water heater unit is heated at high temperature, so the energy-saving effect is good, but the installation cost is relatively high. Attention shall be paid to the installation of air energy heat pump above: in order to avoid unreasonable increase of water pressure, booster pump shall be used.
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