A heat pump dishwasher and its control method

Abstract

The invention discloses a heat pump type dishwasher and a control method. The dishwasher includes a treatment chamber and a heat pump system for heating washing water, and the dishwasher further includes a softening device for softening the washing water; The heat pump system includes an evaporator, the energy storage device contains an energy storage medium, the evaporator contacts the energy storage medium to absorb the heat of the energy storage medium; the softening device is connected to the energy storage device, and the The energy storage medium contains replacement ions that can replace the ions in the softening device, and the energy storage medium can enter the softening device to purify the softening device. The invention adopts the heat pump heating system that absorbs the heat in the energy storage device, cancels the fan, and has lower noise; the softening device is used to soften the washing water, which improves the washing effect of the dishwasher, and the energy storage medium is used to clean the softening device. , so that the softening device can continue to maintain efficient softening performance.

Description

technical field [0001] The invention belongs to the field of kitchen equipment, and in particular relates to a heat pump dishwasher and a control method. Background technique [0002] Dishwashers are equipment used to automatically clean tableware such as bowls, chopsticks, plates, plates, knives, forks, etc. According to the structure, they can be divided into two categories: box type and conveyor type. It reduces labor intensity, improves work efficiency, and improves cleanliness and sanitation for the cooks in restaurants, hotels, and canteens of government agencies. Now, a variety of small dishwashers are on the market and are gradually entering ordinary families. [0003] Existing dishwashers all use heating tubes for the dishwasher. The heating tubes are built into the water tank at the bottom of the liner. When washing, the heating tubes are used to heat while the circulating pump circulates water to wash the dishes. But this method consumes a lot of power and the d...

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Problems solved by technology

[0005] However, the above-mentioned patent has the following disadvantages: although the dishwasher of the above-mentioned patent solves the problem of large heating power consumption of the heating tube to a certain extent, the heat pump system will affect the temperature of the surrounding environment when it is working, especially in order to achieve The evaporator absorbs heat better and is often equipped with a fan, so it is very noisy during heat pump operation

Moreover, when the external ambient temperature is too low, the working efficiency of the heat pump will be greatly reduced, thus affecting the heating speed.

Moreover, the washing water of the dishwasher generally contains a large amount of calcium and magnesium ions. This kind of water not only affects the washing effect of the dishwasher, but also produces scale on the heating device after long-term use, which affects the heating efficiency.

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