Heating pump and washing electric appliance

Abstract

The invention discloses a heating pump and a washing electric appliance. The heating pump comprises an upper pump shell and a lower pump shell, wherein a heating cavity is defined by the lower pump shell and the upper pump shell, the upper pump shell is provided with a water inlet, the lower pump shell is provided with a water outlet, a heater and a temperature protector are installed on the upper pump shell, a through hole is formed in the upper pump shell and covered with a heat conduction piece so that the heat conduction piece becomes a part of the inner wall of the heating cavity; the temperature protector is located on the outer side of the upper pump shell, the temperature sensing face of the temperature protector is attached to the heat conduction piece, heat of the heating cavity can be transmitted to the temperature sensing face through the heat conduction piece, the temperature sensing face can rapidly sense temperature changes in the heating cavity, temperature sensing is more accurate, sensitivity of temperature sensing can be remarkably improved, and the temperature protector responds more rapidly; therefore, temperature control accuracy is improved, the fluctuation amplitude of the temperature in the liquid heating process is reduced, the conditions of high temperature, high pressure, dry burning and the like in the heating cavity are greatly reduced, and safety is higher.

Description

technical field [0001] The invention relates to the relevant technical field of household appliances, in particular to a heat pump and a washing appliance. Background technique [0002] The heat pump is used to heat the fluid and is used in washing equipment such as dishwashers. From the perspective of safety, the heat pump must ensure that the liquid during the heating process cannot be overheated and boiled to avoid problems such as high temperature, high pressure, and dry burning in the heating chamber. In related technologies, a temperature protector is added to the heat pump. When the temperature in the heating chamber is too high, the heater can be disconnected through the temperature protector to play the role of heating protection. The temperature protector is usually installed on the pump casing. On the outside, the heat transferred by the shell of the heat pump is used to sense the water temperature. However, it is easily affected by the thermal conductivity of the...

AI Technical Summary

Problems solved by technology

In related technologies, a temperature protector is added to the heat pump. When the temperature in the heating chamber is too high, the heater can be disconnected through the temperature protector to play the role of heating protection. The temperature protector is usually installed on the pump casing. On the outside, the heat transferred by the shell of the heat pump is used to sense the water temperature. However, it is easily affected by the thermal conductivity of the shell. The temperature sensed by the temperature protector has a large deviation from the temperature in the heating chamber, the temperature sensing effect is not good, and the temperature response speed is low. Reduce the accuracy of temperature control

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