Heat pump water heater capable of ultrasonic water level detection

Abstract

The invention provides a heat pump water heater capable of ultrasonic water level detection, comprising an air source heat pump and a water tank; a heat exchange coil is arranged in the water tank; liquid inlet and outlet tubes of the heat exchange coil extend out of the water tank and are respectively connected with liquid inlet and outlet tubes of the air source heat pump; an ultrasonic water level detector is arranged on the water tank; a reflection guide tube is arranged in the water tank; a water inlet tube and a water outlet tube are arranged on the water tank; a solenoid valve and a water inlet temperature sensor are arranged on the water inlet tube; a water pump is arranged on the water outlet tube; vent holes are arranged on the water tank. Inlet and outlet water and heating conditions of the water tank of the water heater can be controlled by the ultrasonic water level detector, the solenoid valve and the water pump in a coordinated way, so that the hot water from the water heater is completely separated from the water pressure of water systems to ensure that the water temperature in the water tank keeps constant according to the design requirement in the process of water use by users, therefore, the users can obtain high-quality hot water, and the water yield and water tank utilization ratio of the heat pump water heater are improved. The water heater also has the advantages of concise and compact structure, simple and convenient use and stable water outlet temperature.

Description

technical field [0001] The invention relates to a heat pump water heater, in particular to an ultrasonic water level detection heat pump water heater. Background technique [0002] Existing various types of heat pump water heaters have the following defects: in the existing heat pump water heaters, when the user uses water, the hot water in the water tank of the water heater is pushed out by the water pressure of the tap water, that is, the hot water in the water tank of the water heater flows out and the cold water flows out simultaneously. In addition, most of the existing heat pump water heaters do not have a water level detection device for the water tank, so it is difficult for the user to accurately understand the water level in the water tank. A small number of water heaters equipped with water level detection devices are all switch-type water level detectors. Switch-type water level detection devices are limited by their technical conditions and have low accuracy. It...

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Problems solved by technology

[0002] Existing various types of heat pump water heaters have the following defects: in the existing heat pump water heaters, when the user uses water, the hot water in the water tank of the water heater is pushed out by the water pressure of the tap water, that is, the hot water in the water tank of the water heater flows out and the cold water flows out simultaneously. In addition, most of the existing heat pump water heaters do not have a water level detection device for the water tank, so it is difficult for the user to accurately understand the water level in the water tank. A small number of water heaters equipped with water level detection devices are all switch-type water level detectors. Due to the limitation of their technical conditions, the accuracy of switch-type water level detection devices is low, and it is difficult to accurately control the outlet water temperature and water output.

Some heat pump water heaters use pressure sensor water level detection devices, but until now the high-precision water level detection pressure sensor technology is mostly monopolized by several large foreign companies, so the cost is too high, which greatly increases the cost of water heaters. Unacceptable to ordinary consumers

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