Instantaneous air energy heat pump water heater and its control method

Abstract

The invention discloses an instant air energy heat pump water heater and a control method thereof. The water heater includes a first heat pump circulation loop, a second heat pump circulation loop, a water pipeline component module, an electric heating module and a control module; two heat pump circulation loops Each circuit is equipped with a compressor and a condenser; the water pipeline module includes a water inlet pipeline, a heat pump heating pipeline, and a water outlet pipeline connected in sequence; a water flow regulating valve is provided in the above-mentioned connected pipelines; the electric heating module Set on the water outlet pipeline; the condenser and the heat pump heating pipeline in the two heat pump circulation loops are integrated into a plate heat exchanger or a casing heat exchanger; the control module controls the two compressors, the second compressor, and the electric heating module , The working state of the water flow regulating valve is controlled. The water heater of the present invention does not need a water tank, can be used immediately when it is turned on and ensures constant temperature water outlet, has a simple structure, and improves the stability and reliability of the operation of the heat pump unit.

Description

technical field [0001] The invention relates to the field of heat pump water heaters, in particular to an instant air energy heat pump water heater and a control method thereof. Background technique [0002] Traditional air source heat pump water heaters are generally composed of two parts, one is the host part, and the other is the water tank part; for household water tanks, 1. The capacity is generally 150-320L, and the water tank is huge, and it needs to occupy a large part of the installation. Even if some water tanks are installed outside the wall with brackets, due to the weight of water added to the water tank itself, this type of installation is quite dangerous. 2. The material and process used in the inner tank of the water tank, whether it is a stainless steel inner tank or an enamel inner tank, due to defects in the manufacturing process, it is inevitable that the water tank leaks; 3. The heat exchanger inside the water tank generally uses copper tubes or stainles...

AI Technical Summary

Problems solved by technology

[0002] The traditional air energy heat pump water heater is generally composed of two parts, one is the host part, and the other is the water tank part; for household water tanks, 1. The capacity is generally 150-320L, and the water tank is huge, and it needs to occupy a large part of the installation. The building area, even if some water tanks are installed outside the wall with brackets, due to the weight of the water tank itself, this type of installation is quite dangerous

2. The material and process used in the inner tank of the water tank, whether it is a stainless steel inner tank or an enamel inner tank, due to defects in the manufacturing process, water tank leakage is unavoidable; 3. The heat exchanger inside the water tank is generally made of copper tubes or stainless steel In areas with poor water quality, the heat exchange tubes will be corroded and perforated, resulting in refrigerant leakage. Once a leak occurs, it will be fatal to the unit; Avoid artificial leakage of refrigerant during installation; 5. Due to the characteristics of water storage heat pumps, the water temperature needs to be raised to a higher temperature, and it takes a long time, which cannot meet the immediate water requirements, and the water temperature fluctuates in the later stage of water use Larger, which affects the comfort of use; in addition, the condensing temperature determines the energy consumption of the unit. The traditional unit with water tank operates at high condensing temperature and high condensing pressure for a long time, which will be a big test for the life of the compressor. ;6. The water storage type water tank is used, and the water generally needs to be mixed when using water. This will cause several problems. 1) The hot water usage rate in the water tank is not high; 2) During the heat preservation process of the water tank, the water temperature will inevitably appear. 3) When the user installs a water valve at home, it is necessary to install a water mixing valve, which increases the cost of materials

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