JPH0447570B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention is a cleaning chamber that is opened by a door body, in which objects to be cleaned are easily stored and installed, and cleaning water from a cleaning tank is supplied from a cleaning nozzle. This article relates to a dishwasher that sequentially performs a washing operation in which hot water is sprayed onto the items to be washed, and a rinsing operation in which hot water from a booster is injected onto the items to be washed from a rinsing nozzle, and in particular relates to an exhaust device that exhausts steam from the washing chamber to the outside of the main unit. be.

(b) Prior Art In the conventional exhaust structure disclosed in Japanese Utility Model Publication No. 54-15489, an opening is formed on the rear surface of the door when the door is opened, and steam in the cleaning chamber is exhausted from this portion.

With such a conventional exhaust structure, exhaust from the rear of the cleaning chamber is fast, but exhaust from the front of the cleaning chamber, that is, near the door, is slow, and exhaust from the front of the door cannot be completely prevented. It was also inefficient in that it was a natural exhaust system, and it could not be said that it could completely guarantee the safety of workers.

(c) Object of the Invention The present invention addresses the drawbacks of the prior art and provides an exhaust system that efficiently exhausts steam from a cleaning chamber and further improves worker safety.

(d) Structure of the Invention The present invention forms an exhaust port in the top plate of a cleaning chamber, and an exhaust fan that is linked to a drive motor is disposed inside an exhaust duct that communicates with the exhaust port. This exhaust device for a dishwasher is provided with a timer device that is started after the end of the washing operation and operated until at least the end of the rinsing operation.

(E) Embodiment FIG. 1 is a longitudinal cross-sectional view showing the internal structure of a dishwasher equipped with an exhaust system of the present invention. A washing chamber 3 which is opened is divided into sections, and washing nozzles 4A and 4B and rinsing nozzles 5A and 5B are rotatably arranged above and below the washing chamber 3, and objects to be cleaned 6 are stored between them. A rack 7 is placed on a support rail 8. Further, a cleaning tank 11 is formed in the lower part of the main body below the cleaning chamber 3. The upper surface is covered with a removable filter 9 and an overflow pipe 10 communicating with the outside is provided upright.

Therefore, the cleaning nozzles 4A and 4B and the cleaning tank 1
A cleaning pump 12 is arranged between the booster 1 and the rinsing nozzles 5A and 5B, and the booster 1 is arranged in parallel with the main body 1.
By disposing a rinse pump 14 between 3 and 3, the cleaning pump 12 pumps the cleaning water from the cleaning tank 11 to the cleaning nozzles 4A and 4B, and the rinsing pump 14 transfers the hot water stored in the booster 13 to the rinsing nozzles. 5A and 5B.

Next, the exhaust system of the present invention will be explained. Top plate 3 of the cleaning chamber 3 located closer to the door body 2 of the cleaning chamber 3
An exhaust port 15 is formed at A, an exhaust duct 16 communicating with the exhaust port 15 is installed on the top plate 3A, and an exhaust fan 18 linked to a drive motor 17 is disposed inside the duct 16. 19 is a guide plate that prevents the jet water from scattering from the exhaust port 3A.

Further, the main electrical circuit of the present invention will be explained with reference to FIG. 20 is a manual operation switch; 21 is a timer that controls the operation of the cleaning pump 12 and the rinsing pump 14 and also controls the operation of the drive motor 17 of the exhaust fan 18;
A first timer contact 21A connected in series with the rinsing pump 14, a second timer contact 21B connected in series with the rinsing pump 14, and a third timer contact 21B connected in series with the drive motor 17.
It has a timer contact 21C. Thus, the first timer contact 21A is closed at the same time as the timer 21 is energized, and opened when a predetermined cleaning time has elapsed.
The second timer contact 21B is the first timer contact 21
After the circuit A is opened, the circuit is closed, and the circuit is opened when a predetermined rinsing time has elapsed. Further, the third timer contact 21C is closed at the same time as the second timer contact 21B, and is opened a little while after the second timer contact 21B is opened.

Next, the cleaning and rinsing operations and the exhaust operation of the present invention will be explained. First, the rack 7 containing the objects to be cleaned 6 is installed in the cleaning chamber 3, the door body 2 is closed, and the operating switch 20 is closed, the timer 21 is energized, the first timer contact 21A is closed, and the cleaning pump is turned on. 12 is operated to forcefully feed the cleaning water previously supplied to the cleaning tank 11 to the cleaning nozzles 4A and 4B, and inject it onto the object 6 to be cleaned from the nozzles 4A and 4B to start the cleaning operation.

When the predetermined cleaning time has elapsed, the first timer contact 21A opens, so the cleaning pump 12
stops, the cleaning operation ends, and subsequently, the second timer contact 21B closes, and the rinse pump 1
4 operates to pump the hot water from the booster 13 to the rinsing nozzles 5A and 5B.
A rinsing operation is started by spraying water from B onto the object 6 to be cleaned.

Simultaneously with the start of this rinsing operation, the third timer contact 21C is closed, the drive motor 17 is energized, and the exhaust fan 18 is rotated. As a result, the steam in the cleaning chamber 3 is sucked in through the exhaust port 15 and into the duct 1.
6 and is exhausted above the washer.

Then, after the predetermined rinsing time has elapsed, the second
Since the timer contact 21B is opened, the rinse pump 14 is stopped and the rinse operation is completed. Furthermore, after a certain amount of time has passed after the completion of this rinsing operation, the third timer contact 21C opens and the drive motor 17
The exhaust fan 18 is stopped and the exhaust operation is ended. Therefore, at the end of the rinsing operation, most of the steam in the cleaning chamber 3 is forcibly exhausted to the outside from above the cleaning chamber 3, so when the door body 2 is raised, almost no steam is exhausted to the front of the cleaning chamber 3. The operator can safely perform the work of removing the object 6 to be cleaned after the rinsing operation is completed.

Note that the setting of the exhaust operation time in the present invention is as follows:
The exhaust fan 18 is not limited to the embodiment, but is started after the cleaning operation is finished and operates at least until the rinsing operation is finished, for example, one that starts during the rinsing operation and is set to stop at the same time as the rinsing operation ends or after the rinsing operation ends. This includes:

(f) Effects of the Invention In the present invention, when an operator opens the door to take out the object to be cleaned, most of the steam in the cleaning chamber is exhausted to the outside from above the cleaning chamber.
This has the advantage that the operator can take out the object to be cleaned extremely safely, and also has the additional advantage that the exhaust operation can be performed efficiently in a short time.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing the internal structure of a dishwasher equipped with the exhaust system of the present invention, and FIG. 2 is a main electrical circuit diagram of the present invention. 3 ...Cleaning chamber, 3A...Top plate, 15...Exhaust port, 16...Exhaust duct, 17...Drive motor,
18...exhaust fan, 21 ...timer, 21C
...Third timer contact.

Claims (1)

[Claims] 1. A cleaning operation in which the object to be cleaned is easily stored and installed in a cleaning chamber opened by a door body, and cleaning water from the cleaning tank is sprayed from a cleaning nozzle onto the object to be cleaned,
In a dishwasher that sequentially performs a rinsing operation in which hot water from a booster is sprayed from a rinsing nozzle onto the items to be washed, an exhaust port is formed in the top plate of the washing chamber, and a drive motor is installed inside the exhaust duct that communicates with the exhaust port. What is claimed is: 1. An exhaust system for a dishwasher, characterized in that an exhaust fan is disposed in conjunction with the exhaust fan, and a timer device is provided for starting the drive motor after the end of the washing operation and operating it at least until the end of the rinsing operation.