In recent years, with the rapid development of the economy, the requirements of high-end residences on the home environment have been continuously improved. “Constant temperature, constant humidity, constant oxygen, and constant quietness” have become the environmental standard of high-end residences. The owners began to Know about the double-supply system of air source heat pump.
What exactly is the ” double-supply system of air source heat pump “?
After the first generation of window air conditioning, the second generation of wall-mounted machine (cabinet, air duct) air conditioning, and the third generation of fluorine central air conditioning. “Central air conditioning + floor heating” is the fourth generation of central air conditioning. It is characterized by one machine and two functions, that is, it can be used as a cooling source for air conditioning in summer and as a heat source for the floor heating system in winter, which can achieve the effect of warming in summer and cooling in summer, replacing the traditional “central air conditioning refrigeration + wall heating” heating system mode. The system has been praised by industry experts as “heat source revolution of heating + end revolution of refrigeration”.
In contrast, the double-supply system of air source heat pump unit is known as the fourth generation central air conditioner in the industry, also known as “water machine”, “water system central air conditioner”, “floor heating air conditioner”, “floor heating air conditioner” and so on.
The mature technology of the air source heat pump cooling and heating unit is the key factor for the realization of this system! At the beginning, the two-generation system was called “one source and two ends” by the HVAC industry. “One source” refers to the use of air-source heat pump cooling and heating units for cold and heat sources. “Two ends” refers to the end of the radiant coil and fan coil. system. Water is used as the heat exchange medium in all rooms (the fluorine machine uses a refrigerant to exchange heat). In the summer, cold water is supplied and directly sent to the fan coil for cooling. In winter, hot water is supplied directly from the outdoor unit at around 45 ° C for floor heating. The system cooperates with the stability of the secondary system of the buffer tank and the good thermal stability of the floor heating, and the overall stability of the system is high.
The system has flexible terminal configuration and flexible control methods. It can achieve 35 ℃ low temperature hot water heating and 10 ℃ chilled water cooling, and its overall operation is more than 50% energy-saving than central air conditioning.
Therefore, the double-supply system of air source heat pump unit is a home comfort system that integrates air conditioning, floor heating and dehumidification. The system has the advantages of high integration, high efficiency, comfort, energy saving and controllability, and good economy. It is suitable for different types of buildings.
In fact, it is not difficult to find out by carefully comparing the unit of each system that the air source heat pump is better for heating!
It is generally believed that the central air conditioner of the fluorine machine can theoretically cool and heat, but from the core function, the main function of the central air conditioner is cooling, and heating is only its second function. The birth defect is the winter heating effect not good, the heating effect when temp lower than -5 ℃, it more reliance on electric auxiliary heating, power consumption is very large. Even if it can start running, it often blows out cold wind, which is extremely uncomfortable.
There is a saying in the industry that describes the performance of central air conditioning: “Refrigeration is the duty, and heating is the ability”, and the air source heat pump is designed for heating in terms of design standards and spare parts selection. Let’s take a look at the difference between the two.
The design conditions stipulated in the respective standard, the heating conditions of the air source heat pump heating machine, the air side temperature is “-12 ℃”; the heating conditions of the fluorine machine central air conditioning, the air side temperature is “7 ℃”. The main design working conditions of the air source heat pump heating mechanism are below 0 ° C, while all the design working conditions of the central air conditioning heating are above 0 ° C.
It can be seen that the most essential difference between the two is the different application scenarios: the air source heat pump heater is created for heating in winter, and the central air conditioner focuses on cooling, taking into account heating, and its heating is only used for normal temperature scene. Although the two are similar in appearance, the principles and application methods are actually two different products.
In order to ensure the heating effect, the compressor used in the heat pump heating machine is a special low-temperature jet enthalpy-increasing compressor for the heat pump, and the central air conditioner uses an ordinary compressor. In addition to the four major parts of a traditional air conditioner (compressor, condenser, throttling part, evaporator), heat pump heaters generally add an intermediate economizer or a flash evaporator to provide a low-temperature and low-pressure refrigerant for the “jet enthalpy increase” compressor Jet”.
The floor heating in winter is more comfortable than the wind plate, and the end of the winter heating of the double-supply system of air source heat pump uses the floor heating method. The floor heating is in accordance with the supply and demand of the human body that warms the feet and cools the top of the traditional Chinese medicine. Bottom-up transmission, warm and cool under the room, suitable for the physiological characteristics of the human body, giving people a natural sense of comfort. Make winter warmer and summer more comfortable!
The floor heating is installed under the floor, does not affect the appearance of the room, does not occupy the indoor space, and is convenient for decoration and furniture layout, and the temperature is controllable. In terms of energy consumption, the heat pump floor heating method can be used to save energy consumption by more than 50% compared with heating and cooling air conditioners. The energy saving effect is obvious, and it is greener and more environmentally friendly.
Summer water system air tray is softer than fluorine system. The air-end heat pump two-generation system uses a fan coil at the end of summer cooling, which is the central air conditioning of the water system.
The structure of the system is simple, and maintenance and management are convenient. The hidden fan coil can also reflect the decoration grade of the central air conditioner. Moreover, the water system air conditioner blows out softer wind, relatively speaking, the moisture content is more than that of the cold coal system, so in the room No matter how long it blows, there will be no dry mouth.
It is mainly suitable for large-scale houses such as duplex structure houses and villas. The greater the utilization rate, the more energy-saving, suitable for the use of large-scale houses.
And on cost, floor radiant heating has a higher thermal efficiency than convection heating. The heat is concentrated in the height of human benefit. Even if the indoor set temperature is 2 ℃ -3 ℃ lower than convection heating, it can make people feel the same warmth. Under normal circumstances, for every 1 ° C decrease in the temperature of residential mining, it can save 10% of energy. So, “heat pump + floor heating saves money”!
Under the same floor heating, traditional floor heating uses gas to provide heat. Gas is non-renewable energy, and the utilization rate ignores heat loss, and the output ratio is up to 1: 1. That is, one gas can only provide the heat of one gas at most. The air source heat pump cooling and heating unit uses low-grade air heat and uses a small amount of electricity as a drive. It can absorb more than 2 parts of air energy with only 1 electric energy, that is, users can get more than 3 times the heat.
In the double-supply system of air source heat pump, summer cooling and fluorine system central air conditioning consume almost the same energy, but in winter, the general thermal efficiency (energy efficiency ratio) can reach 2.5-3.0, which can save 50% to 60% energy compared with heating and cooling air conditioning. Compared with wall-hung boiler heating, air-source heat pumps are more energy-efficient. With the implementation of tiered gas prices nationwide, the cost can be saved by more than 50% to 75%. It can be said that the air-source floor heating air conditioner meets the decoration needs of modern homes, and is humanized and intelligent. It is the first choice for modern home heating and cooling methods.