JPH03297435A - Dish washer - Google Patents

Abstract

PURPOSE:To omit a special driving device so as to widely use the space in the interior of a dish washer by connecting a shape memory alloy to the lid member which causes a lid member of a detergent storing box to open when it reaches the suitable temperature for washing. CONSTITUTION:A detergent storing box 7 comprises a rectangular parallelo- piped detergent container 8 fixed to a door lid 4, a lid member 10 which is in close contact with an opening of the container and capable of freely turning around a shaft 9, and a locking device 11 for locking such opening. A helical spring 12 is mounted around the shaft 9, whereby the lid member 10 is always energized in the opening direction. The locking device 11 comprises a projection 14 projected from the free end of the lid member 10 and a hook 15, wherein the hook 15 is capable of freely turning around a supporting shaft 16 and a spring 17 made of a shape memory alloy is stretched between a lever portion 15a integral with the hook 15 and the door lid 14. The shape memory alloy spring 17 is set to such a length that the hook 15 can be held at a solid line position when the ordinary temperature is less than 35 deg.C, when it reaches the transformation start temperature about 50 deg.C, it contracts to bring the hook 15 to the chain line position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a dishwasher that automatically jets out washing water and dispenses detergent to wash dishes.

[Prior Art] The detergent dosing device for the dishwasher described above has a small-volume box provided inside the dish storage, stores an appropriate amount of detergent in the detergent storage box in advance, and An active device such as a solenoid connected to 11 members of the box is started at an appropriate timing by electronic control equipment, the lid member is opened, and the detergent in the box is poured into the SO storage.

[tlAME to be solved by the invention However, since the above-mentioned one-member active device must be completely waterproof, it is bulky and expensive in the dishwashing layer. A disadvantage is that if the waterproof performance deteriorates, failures and malfunctions are more likely to occur.

This invention attempts to eliminate the above-mentioned drawbacks.

[Means for Solving the Problems] The present invention proposes connecting a shape memory alloy to the lid member of the detergent storage box, which brings the lid member into an open state when the temperature reaches an appropriate temperature for cleaning.

[Example code] FIG. 3 shows an overall perspective view of the dishwasher according to the present invention.

This dishwasher (1) has a washing chamber (2) that can store dishes inside.
) and a door cover (4) that opens and closes from the front, and is designed to store a large number of dishes loaded in a basket inside the washing room (2). .

And at the bottom of the cleaning room (2)! l! A hot water jetting vane (5) rotating around a vertical axis is provided, and the door 1
After closing (4), when a switch is turned on for a predetermined cleaning process, the jetting vanes (5) start rotating due to the reaction force of the hot water jetting force (6), and the hot water flows into the cleaning chamber (2). Sprayed evenly over the dishes.

In this embodiment, a detergent storage box (7) is provided at the upper part of the inside of the door lid (4), and this storage box (7)
The lid is automatically opened when the hot water is heated to a predetermined temperature.

Below, we will visit the detergent storage 1i (7) in detail based on Figure Ill. 2.

The detergent storage box (7) in this example has a rectangular parallelepiped detergent container (8) fixed to the door lid (4), and a detergent container (8) that can be rotated around a shaft (9) that is in close contact with the opening of this container (8). *m material (10
), and a locking device t (11) that locks the opening of MmH (10).

A helical spring (12) is mounted around the shaft (9) and constantly biases the lid member (1o) in the opening direction.

Further, a packing material (13) such as rubber is attached to the back surface of the lid member (10) in order to improve the sealing performance of the storage box (8).

The locking device (11) has a protrusion (1
4) and a hook (15) that can be caught on this protrusion (14).
), the hook (15) is rotatable around the spindle (16), and there is a lever part (158) integrated with the hook (15) and the door lid (4). The spring (17) is made of shape memory alloy and is covered with a tension shell.

Note that the curved portion of the hook (15) and the surface of the protrusion (14) that is hooked on the hook (15) are such that the hook will not come off naturally even with the turning force in the opening direction of the lid member (10). The slope is formed.

In addition, the shape memory alloy spring (17) has a length that maintains the hook (15) at the solid line position in Figures 1 and 2 at room temperature (below 35 degrees Celsius), but it begins to undergo transformation at around 50 degrees Celsius. When the temperature rises, it contracts and is set to a length that brings the hook (15) to the position shown in dashed lines in Figure 112.

For example, an In--Cd alloy that starts to transform at around 50 degrees centigrade is used.

Therefore, when using this dishwasher (1), manually remove the hook (15), pour powder or liquid detergent into the detergent container (8), and then manually rotate the lid member (10). Close it and hook the hook (15) onto the protrusion (14).

At this time, since the door* (4) has been tilted down to a nearly horizontal position, the detergent container II (8) is also horizontal as shown in the diagram, so the detergent container ( 8), and after the lid member (10) is closed, the sealing action of the packing material (13) prevents the detergent from leaking out.

After the setting is completed as described above, when the door lid (4) is closed and the specified cleaning process is started, hot water is ejected into the cleaning chamber (2) as described above, so that the indoor temperature increases. When the spring (17) rises or hot water is applied directly to the spring (17), the spring (17) moves and the hook (15) comes off, opening the detergent container (8) and releasing the detergent inside. Ru.

If the temperature of the hot water has not reached the predetermined temperature, the spring (17) will not contract and the detergent will not be released.

In the above embodiment, the lid member (10) is always biased in the opening direction by the helical spring (12), and the lid member (10) is always biased in the opening direction.
A shape memory alloy spring (
17), but as shown in Figure 4, the lid member (
10) may be coupled with a shape memory alloy.

That is, a spring-like shape memory alloy (18) may be connected to one end of the sliding lid member (10).

In this case, the door at one end of the shape memory alloy (18)! (4) manually remove the lock (19), then pull the lid member (10) sideways to put detergent into the detergent container (8), then close the lid member (10). The above locking @
(19) so that it is hooked on the locking piece (20) of the door 1i (4).

Therefore, in this case, it is preferable that the reduced length of the shape memory alloy (18) be approximately the same as the sliding radius of the sliding m1 member (IO).

[Effects of the Invention] As is clear from the above description, according to the present invention, a special drive device such as a solenoid connected to an electronic control device can be omitted, so the space in the dishwashing room can be widely utilized.
Moreover, there is no risk of failure.

[Brief explanation of the drawing]

Figure 311 is a plan view of a detergent storage box in a dishwasher according to the present invention, Figure IIZ is a side view of the same, Figure 113 is an overall perspective view of the dishwasher, and Figure 4 is a side view showing another example of the detergent storage box. It is a diagram. (1)...Dishwasher, (7)...Detergent storage box, (8
)...Detergent container, (10)...li'IJ material, (
12)...Locking device, (15)...Hook, (1
7) (18) Shape memory alloy.

Claims (1)

[Claims] A dishwasher characterized in that a shape memory alloy is connected to a lid member of a detergent storage box to bring the lid member into an open state when the temperature reaches an appropriate temperature for washing.