Upward air curtain split heat pump air conditioner driven by air-solar hybrid source

Abstract

The invention discloses an upward air curtain split heat pump air conditioner driven by an air-solar hybrid source. (1) Solar energy is absorbed via a reflector, a transparent blade, and a fin hohlraum, air energy is absorbed via a fin, and integrated design of a solar energy absorber and an air fin evaporator is realized; (2) an air-solar hybrid source split heat pump air conditioner is built, and the evaporation temperature is improved; (3) in a mode of unified heating of the vertical upward air curtain and the air conditioner high-efficiency tail end, a condensation temperature is reduced; (4) the heating capacity of the heat pump and the energy efficiency ratio are improved through reducing a cyclic temperature difference; and (5) the solar energy is used for driving the heat pump in a high-efficiency and cheap photo-thermal conversion form, and the application threshold of the solar split heat pump air conditioner is reduced.

Description

(1) Technical field [0001] The invention relates to an air-solar composite source driven upwind curtain split type heat pump air conditioner. (2) Background technology [0002] The existing solar heat pump air conditioners mainly have two product forms: [0003] 1. The heat pump evaporator is designed as a solar panel absorber: it is made of double-layer aluminum plates painted black on the surface facing the light, and the distributor and circulation pipe of Freon heat pump working fluid are formed between the double-layer aluminum plates; among them, the black-coated aluminum plates are used to absorb the sun. light and provide heat for evaporation, while distributors and flow ducts are used to optimize the evaporation process in the heat pump cycle. Since the intensity of sunlight received by each square meter area does not exceed 1kW, it greatly limits the improvement of the heating capacity of the heat pump; in addition, since this form of evaporator has no fins, it ca...

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Problems solved by technology

Since the intensity of sunlight received by each square meter area does not exceed 1kW, it greatly limits the improvement of the heating capacity of the heat pump; in addition, since this form of evaporator has no fins, it can be used from the evaporator at night when there is no sunlight. The heat absorbed in the air is greatly reduced, resulting in a low utilization rate of the product, which can only be used to heat a small amount of domestic hot water during the day, and its heating capacity is much lower than that of an air source heat pump water heater

[0004] 2. The heat pump air conditioner and the solar panel are independently designed: the solar panel converts the received sunlight into alternating current through the inverter, which is used to drive compressors, fans, and circulating water pumps of various forms of heat pump air conditioners; however Since the intensity of sunlight received by each square meter area does not exceed 1kW, and the existing photoelectric conversion efficiency is extremely low, not only the area required for solar panels is very large, but also the investment required for solar panels is very large. Expensive; therefore difficult to commercialize at the current state of the art

[0006] 1. Buried pipe heating: Due to the heat storage and heat radiation through the floor, the condensation temperature can be reduced and the heat pump heating capacity and energy efficiency ratio can be improved; however, its disadvantages are as follows: (1) The material cost and installation cost of the buried pipe are relatively high; ( 2) The product must be assembled on site, and it is difficult to ensure the quality of the product when it is supplied in large quantities; (3) It is difficult to maintain the buried pipe; (4) In order to realize the air-conditioning function, it is necessary to add a wall-mounted indoor unit to switch between the two terminals. On the one hand, this leads to fluid accumulation of Freon working fluid, which affects product reliability; on the other hand, the two terminals also increase product cost

[0007] 2. Split type air conditioner: In order to realize the return air dehumidification of the air conditioner in summer, its indoor unit cools the indoor return air at 27°C to 12°C with a small air volume and large temperature difference; however, when the indoor unit is used for heating in winter, it faces the following Difficulties: (1) The temperature difference between the supply air and the return air corresponding to the small circulating air volume is relatively large, resulting in high condensation temperature, reducing the heating capacity and energy efficiency ratio of the heat pump, and it is difficult to independently meet the heating application requirements in the severe cold regions of the north; (2) wall-mounted Indoor unit and ceiling-mounted indoor unit: Since the air is returned from the roof and supplied from the upper part, the upper part of the room is always circulated and heated and then returned after thermal stratification; on the one hand, this increases the condensation temperature and reduces the heating capacity of the heat pump and the energy efficiency ratio ; On the other hand, the air temperature in the lower part is low, which reduces the heating effect; (3) Vertical cabinet indoor unit: due to the return air in the lower part and the horizontal air supply in the middle part, it always circulates and heats the return air in the lower part to improve the heating effect

[0009] 4. Vertically downward cold air curtain for air conditioners: block the penetration of hot air and reduce the cooling load of building air conditioners; but because the air curtain is formed vertically downward, the effect of heating operation is not ideal

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