Heat storage type domestic central air-conditioning, heat supply and water heating three-purpose machine

Abstract

The invention discloses a heat storage type domestic central air-conditioning, heat supply and water heating three-purpose machine. The heat storage type domestic central air-conditioning, heat supplyand water heating three-purpose machine comprises a refrigerant, heat supply/air conditioning water circulation and control system, and is characterized by further comprising a domestic hot water heat exchanging and heat storing machine; the domestic hot water heat exchanging and heat storing machine consists of a preceding-stage water heat exchanger, a hot water tank and a domestic hot water heat exchange tube; a refrigerant circulation system comprises a loop which is formed by sequential connection of a compressor, the preceding-stage water heat exchanger, a four-way valve, a water heat exchanger, a throttling valve, an outdoor air heat exchanger, a four-way valve, an air and liquid separator and a compressor; a heat supply/air conditioning water circulation system comprises a loop formed by sequential connection of a circulating water pump, a water access of the water heat exchanger, a coil tube fan and a dual-purpose water tank; a loop for generating domestic hot water by using aheat pump in spring and autumn consists of a circulating water pump, a water access of the water heat exchanger, a hot water tank and a dual-purpose water tank which are connected in sequence; the hot water tank is used for storing heat and supplying domestic hot water; and the heat exchange amount of the preceding-stage water heat exchanger is smaller than 1/5 of that of the water heat exchanger. The three-purpose machine disclosed by the invention has the functions of supplying head, conditioning air and supplying domestic hot water in four seasons, is extremely simple in both structure andcontrol, is high in efficiency and saves energy.

Description

technical field [0001] The invention relates to the technical fields of refrigeration air conditioners, heat pump water heaters and energy saving. Background technique [0002] There are two types of existing household heating and cooling air conditioners, one is the fluorine cycle cold air conditioner that only uses the refrigerant cycle to output the heat of the indoor air to the outside, or the fluorine cycle hot air that inputs the heat of the outdoor air to the room for heating. This form of equipment is usually called a heating and cooling air conditioner. Heating and cooling air conditioners are only used in summer and winter, and are generally idle in spring and autumn, resulting in seasonal waste of equipment and funds. The existing heating and cooling air conditioners are transformed into three-purpose machines for heating, air conditioning, and hot water. Under the premise of ensuring the function of the air conditioner , instead of household electric water heate...

AI Technical Summary

Problems solved by technology

The heat transfer capacity of the domestic hot water heat exchanger is too large, and the refrigerant becomes a saturated liquid in the domestic hot water heat exchanger. When passing through the four-way valve, the high-pressure refrigerant liquid will short-circuit due to the internal leakage of the four-way valve. Go to the low-pressure evaporator, resulting in a decrease in the heating performance of the refrigeration air conditioner or heat pump. In addition, after the refrigerant turns into a liquid in the domestic hot water heat exchanger, the volume flow rate of the refrigerant entering the subsequent stage heat exchanger decreases, resulting in the condensation pressure of the system. If it is too low, the throttling flow is insufficient; if the designed heat transfer is too small, it cannot meet the demand for domestic hot water, and the problem is more that the temperature of the incoming tap water and the heat transfer are unstable, so it also affects the system's refrigeration, air conditioning and power supply. Thermal performance; therefore, the design of the domestic hot water heat exchanger is very critical; moreover, how to provide domestic hot water for bathing and how to improve the efficiency of the heat pump for domestic hot water in spring and autumn is also very important. ;Although the prospect of "air source heat pump triple supply unit" is attractive, the above-mentioned problems have not been solved well, and the existing technology has not fully understood the difference in functions and loads of each heat exchanger in the system, resulting in the current big-name air conditioner heat pump. Household appliance manufacturers are afraid to publicize and promote "air source heat pump triple supply units" with great fanfare, and they still have not been able to launch stable and energy-saving home central air-conditioning + heating + hot water triple-purpose products

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