Domestic coffee machine

Abstract

The invention discloses a domestic coffee machine. The domestic coffee machine includes a machine body and a base, a water tank is arranged in the machine body, the lower end of the water tank is provided with a communication pipeline, a heat-insulation storage tank is further arranged on the machine body, a heating device and a temperature sensor are arranged in the heat-insulation storage tank, the upper end of the water tank is provided with a cover, electric heating wires are arranged in the water tank, the bottom of the water tank is provided with a water inlet pipe and a water outlet pipe, the portion, close to the water inlet end of the water inlet pipe, of the bottom of the water tank is provided with a water retaining hood, the side face of the water retaining hood is provided with a plurality of vertical diversion pipes, the upper ends of the diversion pipes are connected with spiral pipes, the outer ends of the spiral pipes are provided with vertical reflux pipes, the lower ends of the reflux pipes are provided with water distribution spray nozzles, the electric heating wires are located over the water retaining hood, the outer side of the water tank is provided with capacitor electrode probes, the upper ends of the capacitor electrode probes are close to the opposite top locations of the water tank, and the lower ends of the capacitor electrode probes are close to the opposite bottom locations of the water tank. The domestic coffee machine is simple in structure, convenient to use, good in heating effect and environmentally friendly, the energy is saved, and water-level monitoring is convenient.

Description

technical field [0001] The invention relates to the field of home appliances, in particular to a household coffee machine. Background technique [0002] With the advancement of technology, the market application of household coffee machines is more and more extensive, and the functions are also more and more perfect. Although the existing household coffee machine water tank water level detection device can vividly reflect the change or how much of the household coffee machine water tank water level, but There are also various disadvantages. For example, whether using electrode sheets, water pressure sensors, or thermistors, the sensing probe must be placed inside the water tank to directly contact the water. On the one hand, it will affect the water quality of the water tank. Especially as the water used to make coffee for drinking, the water quality is easily polluted by the sensor probe. Secondly, the sensing probe placed in water is prone to scaling or rusting after long...

AI Technical Summary

Problems solved by technology

[0002] With the advancement of technology, the market application of household coffee machines is more and more extensive, and the functions are also more and more perfect. Although the existing household coffee machine water tank water level detection device can vividly reflect the change or how much of the household coffee machine water tank water level, but There are also various disadvantages. For example, whether using electrode sheets, water pressure sensors, or thermistors, the sensing probe must be placed inside the water tank to directly contact the water. On the one hand, it will affect the water quality of the water tank. Especially as the water used to make coffee for drinking, the water quality is easily polluted by the sensor probe

Secondly, the sensing probe placed in water is prone to scaling or rusting after long-term use, which affects the sensitivity of the sensing probe and thus the accuracy of the detection function

[0003] And the water tank of the household coffee machine is mainly used to heat the water for brewing coffee. An electric heating wire is installed in the water tank, and there is a temperature sensor around the electric heating wire. The water inlet and outlet pipes are installed at the bottom of the water tank. After the water is heated to 100 degrees Celsius, it stops heating. When it needs to be used, the hot water is discharged from the outlet pipe, and at the same time, the cold water enters the water tank from the inlet pipe to replenish. With the addition of cold water, when the temperature sensor detects that the water temperature is lower than 70 degrees Celsius , the electric heating wire will be heated, so the electric heating wire in the water tank will always be in an intermittent heating state, but the water inlet pipe on the water tank is generally directly connected to the water tank, so that when cold water enters the water tank, the cold water flow will directly flow to the heating wire Beside, at this time, the temperature around the electric heating wire will quickly drop below 70 degrees Celsius. When the temperature sensor detects that the temperature is lower than 70 degrees Celsius, the electric heating wire will be controlled to heat. In fact, if this part of cold water is fully mixed with the original hot water in the water tank Finally, the overall water temperature is still higher than 70 degrees Celsius. Every time cold water is added, no matter whether the final temperature is higher than 70 degrees Celsius, the electric heating wire will start heating, and then stop heating in a short time, for example, within an hour. One is heating once for ten minutes, and the other is heating ten times, heating for one minute each time. The electric heating wire is powered on and the current is very large at the moment of power off. Obviously, heating ten times will increase energy consumption.

Moreover, the amount of coffee brewed by a household coffee machine will not exactly meet the demand each time. In most cases, the brewed coffee is more than the demand, which is easy to cause waste

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