JPS5929632Y2 - dishwasher - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a dishwasher.

Conventional automatic dishwashers use high-temperature water heated by a heater for the drying process, which has the disadvantage that the drying process cannot be started until the water has boiled, resulting in the entire dishwashing process taking a long time. Ta.

However, the drying of a single dish is affected not only by the temperature of the water used in the drying rinse, which takes advantage of the natural evaporation of boiling water over the dishes, but also by the time it takes to remove the dish after the heater is turned off.

In other words, the longer the time, the better the drying will be.

Therefore, if there is no need to take out the dishes for a long time, there is no need to heat and dry the dishes at high temperatures.

On the other hand, drying at a medium temperature has the advantage that the drying process can be started quickly, thereby shortening the entire dishwashing process and saving energy.

Therefore, the object of this invention is to provide a dishwasher that can select either high or medium temperature as the drying temperature, shorten the time required for the entire dishwashing process, and save energy.

FIG. 1 shows an embodiment of this invention.

In the figure, 1 is a power supply, 2 is a door switch, 3 is a drain motor, 4 is a water supply valve, 5 is a cleaning motor, 6 is a liquid level control switch, 7 is a timer motor, and 8 is a normally open type thermostat. The temperature is 40 DEG C., 9 is a normally closed thermostat whose switching temperature is 70 DEG C., 10 is a heater, 11 is a normally open select switch that can be closed from the outside, and T1 to T8 are timer switch contacts.

FIG. 2 is an explanatory diagram of the operation of the contacts T and T8 in FIG. 1, and the presence of bar lines indicates a closed state.

Next, the operation will be explained with reference to FIGS. 1 and 2.

Detergent is added manually at startup. When the door switch 2 is closed, since the contacts T1 and T7 are closed (see the cleaning hole in FIG. 2), the heater 10 is energized to raise the temperature of the water.

When the temperature reaches 40° C., the thermostat 8 is closed, and since the contact T8 is also closed during cleaning (see cleaning A in FIG. 2), the timer motor 7 is energized and cleaning is continued for another 15 minutes from that point on.

After 15 minutes have elapsed, the contact T is closed by the action of the timer motor 7.
2 to T8 are switched, and the operation of draining, rinsing, and draining → rinsing, draining, rinsing, and draining is performed (see drain B to drain H in FIG. 2).

At that time, the timer motor 7 is energized by closing the contact T6 (
(see Figure 2).

Next, at the time of drying and rinsing (rinsing ■ in FIG. 2), since the contacts T6 and T8 and the select switch 11 are open, the timer motor 7 is de-energized.

At the same time, the contact T7 is closed (see rinsing I in FIG. 2), the heater 10 is energized, and the temperature of the water is increased.

If the select switch 11 is not closed from the outside,
When the temperature reaches 70°C, the thermostat 9 operates and switches to the NO side, energizing the timer motor 7 and
The water will be drained after a few minutes (Figure 2 Rinse ■, Drain J
reference).

However, if the select switch 11 is externally closed before the thermostat 9 operates, that is, before the temperature reaches 70° C., the timer motor 7 will operate via the thermostat 8.

That is, if the temperature has reached 40°C, the thermostat 8 is closed, so the timer motor 7 is activated immediately, and even if the temperature has not reached 40°C, the heater 10 is activated.
When the temperature reaches 40℃, thermostat 8
is closed and the timer motor 7 starts operating.

In either case, the timer motor 7 operates continuously until the temperature reaches 70°C, so the drying and rinsing process begins quickly, shortening the entire dishwashing process and saving energy.

Furthermore, even when water is used, it can be automatically heated to 70° C., which is the operating temperature of the thermostat 9, to dry it.

In this way, it does not affect the water temperature required for washing at all, and can provide two types of drying: high-temperature drying and low-temperature drying.
Since there are only two thermostats 8 and 9, and one thermostat 8 is shared with the washing side, it is possible to provide an inexpensive, energy-saving dishwasher with stable quality.

Note that the same effect can be obtained even if the thermostat 9 (normally closed contact type) is connected to the relay coil and the normally closed contact of the relay is connected to the timer motor 7.

As described above, the dishwasher of this invention can select either high temperature or medium humidity as the drying temperature, so it has the effect of shortening the time required for the entire dishwashing process and saving energy.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an embodiment of this invention, and FIG. 2 is an explanatory diagram of the operation of the contacts of a time switch. 7...Timer motor, 8...Thermostat, 11
...Select switch, T6, T8...Contact.

Claims (2)

[Scope of utility model registration request] (1) A heater that heats water, a first thermostat that closes when the temperature of the water heated by the heater reaches a predetermined first value, and a first timer connected in series to the first thermostat. a contact, a second timer contact connected in parallel to the series circuit of the first thermostat and the first timer contact, and a select switch connected in parallel to the first timer contact and capable of opening and closing by external operation; A timer motor is connected to the series-parallel circuit, a first timer contact is closed and a second contact is opened at least during cleaning, and both the first timer contact button and the second timer contact are opened at least during drying, and the first timer contact button is opened at least when drying. a second thermostat operating at a second value higher than the first value at which the thermostat operates and powers the heater through a normally closed contact and powers the timer motor through a normally open contact; Dishwasher with. (2) The dishwasher according to claim 1, wherein a normally closed contact of the second thermostat controls a relay, and power is supplied to the timer motor via the normally closed contact of the relay.