Today's introduction of the heat pump hot air blower, is designed for the northern heating of the low temperature heating air conditioning, can be -12 degrees heating without decay, the price after the government subsidies is almost free.
The background of the emergence of heat pump hot air blowers
In 2004, Beijing Daily published a title entitled "The City Yesterday Had a Rare Haze Day", and the term "smog" appeared in the news for the first time.
On February 29, 2012, the Ministry of Ecology and Environment issued the newly revised GB 3095-2012 Ambient Air Quality Standards, adding PM2.5 monitoring indicators.
On January 1, 2013, the National Environmental Air Monitoring Network was officially put into operation.
On January 28, 2013, PM2.5 became the haze warning indicator of the meteorological department for the first time.
On September 10, 2013, the State Council issued the "Ten Atmospheric Articles" of the Action Plan for the Prevention and Control of Air Pollution, proposing that after five years of efforts, the target will be completed by 2017: PM10 in prefecture-level cities nationwide will drop by more than 10% (the actual decline is 22.7%), and the PM2.5 in Beijing-Tianjin-Hebei, yangtze river delta and Pearl River Delta will drop by about 25% (actual 39.6%), 20% (actual 34.3%) and 15% (actual 27.7%) respectively.
In 2018, the State Council issued the "Three-Year Action Plan" of the "Three-Year Action Plan for Winning the Blue Sky Defense War", proposing that by 2020, sulfur dioxide and nitrogen oxide emissions will be reduced by more than 15% compared with 2015; PM2.5 cities that do not meet the standard will be reduced by more than 18% compared with 2015.
Northern winter smog is closely related to coal-fired heating, traditional coal-fired heating energy efficiency is low pollution, beijing-Tianjin-Hebei region in the 2016 heating season, PM2.5 concentration is 2.4 times that of the non-heating season, in the entire northern region, nearly 40% of the pollutants in the air come from loose coal burned in rural areas.
The total annual domestic coal consumption in rural areas on the mainland reaches 300 million tons, of which 105 million tons of loose coal for winter heating, the PM2.5 emissions of small coal-fired furnaces in rural areas are 4 times to 10 times that of thermal and electric coal, and the combustion pollution in Beijing accounts for 64 to 83% of the total emissions. According to estimates, in the winter northern heating season, the treatment of loose coal is changed to clean heating, and the proportion of contribution to air quality improvement is about 30%.
The difference between a heat pump hot air blower and an ordinary air conditioner
Ordinary household air conditioning is designed for building heating in the Yangtze River Basin, in the ambient temperature is lower than 2 ° C, the heating performance begins to decay, the lower the outdoor ambient temperature, the more serious the heating attenuation of the air conditioner, which cannot meet the heating needs of the north.
Heat pump hot air blower is designed for heating in Beijing area, is designed for the northern rural winter heating design of low temperature heating air conditioning, also known as "air conditioning heating", "coal to electricity air conditioning" or "electric generation coal air conditioning", used to replace traditional coal-fired heating, reduce the pollution emissions of rural loose coal combustion, in minus 12 degrees low temperature heating is basically not attenuated, minus 20 degrees stable heating.
There are two main differences between heat pump hot air blowers and ordinary air conditioners.
1. The heat pump hot air blower uses a make-up enthalpy compressor
Air conditioning relies on refrigerant to transport heat, in the winter low temperature environment, refrigerant unit density decreases, in the outdoor heat exchanger can not be completely evaporated, compressor suction (gaseous refrigerant) is insufficient, the air conditioning system circulation of refrigerant flow is reduced, the air conditioning system is operated below the design capacity, the heat is attenuated, and the heating energy efficiency ratio (COP) also decreases.
The ordinary compressor is an exhaust port and an inlet; the make-up enthalpy compressor adds a make-up port on this basis
Ordinary air conditioning heating cycle
Replenishment enthalpy is to add a make-up port on the compressor, the air conditioning system also increases the replenishment circuit, from the internal machine to the refrigerant of the external heat exchanger first through the capillary first throttling, the formation of liquid refrigerant, gaseous refrigerant two-phase mix.
- The liquid refrigerant takes the normal circuit, throttling through the electronic expansion valve, evaporating through the external heat exchanger for heat exchange, and then the compressor is normally aspirated.
- The gaseous refrigerant evaporates through the flasher, without heat exchange, and enters the compressor replenishment port to supplement the refrigerant flow of the air conditioning system.
Replenishment enthalpy air conditioning system heating cycle
Compared with the air conditioner using the supplementary gas enthalpy compressor and the ordinary air conditioner, the refrigerant involved in the cycle can be increased by 30%, and when the outdoor environment is at minus 12 °C, the heating performance can also reach more than 95% at 2 °C, and there is basically no attenuation.
In addition to the up-air enthalpy compressor, the heat pump hot air blower will also use a large external heat exchanger to increase the heat exchange capacity, improve the evaporation effect and the energy efficiency of the air conditioning system.
2. The heat pump hot air blower uses low-level air supply, and the vertical temperature difference is small
In winter, the room temperature is mostly 0 ~ 20 °C, the air density is 1.2 ~ 1.3Kg / m³, the hot air of the air conditioner is 40 ~ 60 °C, and the density is about 1.1Kg / m³. Therefore, the hot air of the air conditioner floats in the middle and upper floors of the room, and the vertical temperature difference of the room can reach 10 ° C, which is prone to head heat and foot cold, and the feeling of the body is still cold. The air conditioner needs to run for a long time, and the height of the equal distance from the ground is 5cm to heat up, which means that the whole room is hot.
The vertical temperature difference of air conditioning heating, the best solution is to supply air at a low level.
The indoor unit of the heat pump hot air blower, with two air outlets, is installed at a height of not more than 20cm from the ground, and the hot air at the lower outlet blows directly to the ground, so that the room heat is fast and the heat is even.
Heat pump hot air blower can also be cooled, refrigeration mode is best to close the lower blowing, but because the air outlet position is still low, the air conditioning sinks, the refrigeration comfort is not as good as ordinary air conditioning.
Frequently asked questions about buying a heat pump hot air blower
1. Why is the heat of the heat pump hot air blower not high?
The test conditions are different, the ordinary air conditioner is the heat production at 7 °C outdoors, and the heat pump hot air blower is the heat at -12 °C.
When buying a heat pump hot air blower, you should pay attention to the heating power and COP (heating / heating power). The national standard requires that the COP of the heat pump hot air blower should not be lower than 2.2 at -12 °C, and the COP should not be lower than 1.8 at -20 °C. While the ordinary air conditioner at -12 ° C COP has been as low as 1.5.
Heat pump hot air blower is -12 °C heat production
Compared with air conditioning and electric heating, electric heating is to convert electrical energy into thermal energy, and 1 degree of electric heating 950w is very high, and the heat is 95%. Heat pump hot air blower at -12 °C, COP is generally above 2.4, 1 degree of electricity to the room to transport 2400w heat, so the heating efficiency is higher, above 0 °C COP can reach more than 3.
2. Who needs to buy a heat pump hot air blower?
Architectural climate zoning map of China
Compared with ordinary air conditioners, heat pump hot air blowers have little advantage when they are higher than 2 °C, and heating does not decay at 2 °C ~ minus 15 °C, according to the "China Building Climate Zoning Map", it is suitable for winter heating in the "cold areas" and "northeast south" areas in the figure.
Compared with ordinary air conditioning:
- 1.5 hp hot air blower (Type 30): Use a 1.5 hp performance up gas enthalpy increase compressor with 2 hp air conditioning heat exchangers
- 2 hp hot air blower (type 40): 2 hp performance up-of-air enthalpy compressors are used with 3 hp air conditioning heat exchangers
In terms of heating effect, 1.5 hp hot air blower and 2 hp air conditioners are equivalent, 2 hpele fans and 3 hpe air conditioners are equivalent, the advantage of hot air blowers is that the low temperature environment heating does not decay, and low temperature heating is also more power-efficient.
Comparison of heating effects of 2 hp hot air blowers and 2 hp and 3 hp air conditioners:
- ≤-12°C: 2 hp hot air blowers > 3 hp air conditioners
- -12°C~ 2:2 hp hot air ≈ 3 hp air conditioner
- > 2°C: 3 hp air conditioners > 2 hp hot air blowers
3. Isn't the north central heating? Why do you need a heat pump hot air blower?
The northern winter heating standard is not less than 14 ° C indoors, and the heating of new houses is generally no problem, and the indoor heating can be above 20 ° C. However, in some old housing areas, the heating pipeline is aging, and the heating pressure does not dare to give high, otherwise the pipeline is easy to explode, and the heating is not hot if the pressure is insufficient. When I returned to my hometown in Liaoning in winter, some old houses had only 13 °C indoors.
4. Preferential policies for purchasing heat pump hot air blowers
Heat pump hot air blowers were first incorporated into the government procurement bidding plan in the 2017 Beijing Fangshan District Coal to Electricity Bidding, and eligible families enjoy subsidies for purchase.
In 2020, in the rural areas of Jiaozhou, Pingdu, Laixi and other places in Qingdao, enjoy the clean heating subsidy policy, and the government bidding price is:
- Haier 2 heat pump hot air blower: 4000 yuan, government subsidies of 2500 yuan, actual payment of 1500 yuan
- Haier 2 hpe / 1.5 hp heat pump hot air blower combination: 7300 yuan, government subsidies 5000 yuan, actual payment of 2300 yuan
The 5,000 yuan of government subsidies is paid directly to the winning enterprises, of which Qingdao municipal financial subsidies are 2,000 yuan, Pingdu city financial subsidies are 2,000 yuan, town financial subsidies are 1,000 yuan, and town financial subsidies are paid 40% in the first year, 30% in the second year, and 30% in the third year.
In the retail market, the price of 2 hot air blowers of Gree, Midea and Haier is more than 6,000 yuan, and the government bidding price of 4,000 yuan is very cheap, and the 2 sets after subsidies are only 2300 yuan.
5. Which heat pump hot air blower is better?
In terms of sales channels, heat pump hot air blowers belong to engineering machines, and household air conditioning channels are different, mostly by the manufacturer HVAC or central air conditioning part is responsible, take the government bidding procurement, basically not retail.
Heat pump hot air blower in terms of sales, or Gree, Midea, Haier for the three strong pattern, from the government bidding price point of view, Gree > Midea > Haier. In the air conditioning configuration, each brand uses a supplemental gas enthalpy compressor, Gree uses its own Lingda, Midea uses Meizhi, Haier uses Mitsubishi Electric, and other brands mainly use Meizhi.
The hot air blower used by Meizhi focuses on saving electricity, but the performance is weak, suitable for rooms with small area; the Mitsubishi Electric compressor used by Haier has the strongest heating performance, but the high-frequency operation consumes slightly higher electricity, which is suitable for families with a relatively large area.
However, whether it is Gree, Midea, haier, it cannot be bought on the e-commerce platform, and it is through government bidding.
In Jingdong can still buy hot air blowers, I think you can also buy the brand, mainly Wanjulong, Wanjulong is in 2016 to participate in the Beijing area bidding, is the heat pump hot air blower pilot brand, in Henan region the number of winning bids, sales are better, have their own factory, not OEM, the price is relatively not very expensive.
Another option is TCL, although TCL in the domestic air conditioning sales is not very large, but an air conditioning foundry factory, OEM and export to foreign production is relatively large, but also can buy a brand.
Personally, it is recommended to buy 2 horses 40 type hot air blowers as much as possible, 2 horses are more powerful double rotor compressors, and low frequency use in small rooms is also more power-saving.