JPH11239560A - Dish washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the deformation of a heater pipe due to high injection pressure at the time of injection-molding a heat transmitting body and to facilitate production by permitting the shape of the heat transmitting body to be a semi-cylindrical shape with a radius being almost the same as that of a heater pipe shape and also permitting the fixing of the heater pipe with the heat transmitting body to be a heat transmission body fastening structure. SOLUTION: A washing water circulation duct 24 is connected to a water storing part 21 which is arranged in the bottom part of a dish containing tank 3, the copper heater pipe 13 is connected to the other side of the duct 24 and, moreover, the washing water circulation duct 19 is connected to a water supply pump 8 from the heater pipe 13. The dicast heat transmitting body 23 which is inserted integrally with the heater 12 is arranged in the heater pipe 13. The body 23 is the semi-cylindrical shape with the radius being almost the same as that of the heater pipe 13, the upper surface of the heater pipe 13 is pressed from an A direction after the insertion of the heater pipe 13, the lower surface of the pipe 13 is adhered onto the semi-cylindrical surface of the body 23 and a B-part is fastened so as to fix the heater pipe 13 and the heat transmitting body 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher, and more particularly, to an improvement in a heater for changing washing water to warm water.

[0002]

2. Description of the Related Art Conventionally, a heater portion of a dishwasher has a structure in which the entirety of a heater pipe 13 is covered with a heat transfer member 23 as shown in FIG. Is fixed by a fixing body 26 with a screw.

[0003] The structure of a heater in a dishwasher is described in, for example, Japanese Patent Application Laid-Open No. 8-287913.

[0004]

In the above configuration,
In the case where the entirety of the heater pipe 13 is covered with the heat transfer body 23, the injection pressure is high during the aluminum injection molding of the heat transfer body 23, and the heater pipe 13 may be deformed. However, the yield of the material is also deteriorated.

On the other hand, the upper part of the heater pipe 13 is
In the case of fixing with a screw in step 6, it is difficult to make the outer circumference of the heater pipe 13 and the inner circumference of the heat transfer body 23 into a perfect circle, and it is difficult to perform processing between the outer circumference of the heater pipe 13 and the inner circumference of the heat transfer body 23. In order to solve this problem, it is necessary to use a filler having a good heat transfer coefficient between the outer circumference of the heater pipe 13 and the inner circumference of the heat transfer body 23 in the related art.

[0006]

In order to solve the above-mentioned problems of the prior art, according to the present invention, the shape of the heat transfer member is made to be a semi-cylindrical shape having substantially the same radius as the shape of the heater pipe. Is fixed by a caulking structure of the heat transfer body.

In order to reduce the gap between the contact surface of the heater pipe and the heat transfer body, the shape of the heat transfer body having a semi-cylindrical shape is made larger than the diameter of the heater pipe and the heater pipe is pressed against the heat transfer body. It is configured to be fixed.

According to the above construction, the heat transfer member and the heater pipe need only be fixed by inserting the heater pipe into the heat transfer member and then caulking, as in the prior art in which the entire heater pipe is covered with the heat transfer member. The heater pipe is not deformed due to the high injection pressure during heat transfer injection molding, making it easy to manufacture.
Material yield is also very good.

On the other hand, it is not necessary to form the outer circumference of the heater pipe and the inner circumference of the heat transfer body into a perfect circle as in the conventional case where the upper portion of the heater pipe is fixed by screws with a fixed body. Further, by pressurizing the contact surface between the heat transfer body and the heater pipe, the heater pipe is firmly adhered to the semi-cylindrical surface of the heat transfer body while being deformed and adhered to the heat transfer body. It is not necessary to use a filler having a good heat transfer coefficient.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an external view of a dishwasher, FIG. 2 is a longitudinal sectional view of the dishwasher, FIG. 3 (a) is a plan view showing a configuration (1) of a conventional dishwasher heater, and FIG. FIG. 4A is a front view, FIG. 4A is a plan view showing a configuration (part 2) of a conventional dishwasher heater, FIG. 4B is a front view of FIG. 4A, and FIG. FIG. 2 is a plan view showing a configuration of a heater of a dishwasher according to an example, (b) is a front view of (a), and (c) is a detailed view of a crimped portion indicated by reference numeral B in (a) and (b).

In FIGS. 1 and 2, reference numeral 1 denotes a dishwasher, and the dishwasher 1 has a box-shaped outer frame 2. A tableware storage tank 3 is arranged in the outer frame 2, and a door 4 is provided at an opening on the front surface thereof. At the lower part of the side wall of the tableware storage tank 3, a step portion 3a is provided, and the tableware lower basket 5 is detachably disposed on the step portion 3a.

A rail 6 that moves back and forth is attached to the upper part of the side wall of the tableware storage tank 3. The tableware storage basket 7 is fitted into the rail 6 so that the tableware storage basket 7 can be freely moved. Can be put in and out.

A water supply pump 8 is arranged below the tableware storage tank 3 and has a water supply pump motor 9. Immediately below the tableware lower basket 5, a lower arm nozzle 10 that rotates around a central portion as a fulcrum is arranged, and a plurality of small holes 10a are provided on the upper surface of the lower arm nozzle 10. A Venturi tube 11 b that sends the washing water supplied by the water supply pump 8 to the upper arm nozzle 11 is arranged in the lower basket for storing tableware. An upper arm nozzle 11 that rotates about the central portion thereof is disposed immediately below the tableware upper basket 7, and a plurality of small holes 11a are provided on the upper surface of the upper arm nozzle 11. I have. An exhaust duct 15 is arranged above the tableware storage tank 3, and the exhaust duct 15 is connected to an exhaust port 16. A control panel 17 is arranged above the door 4, and a water supply solenoid valve 14 is arranged on the back of the tableware storage tank 3. A drain pump 18 shown in FIG. 2 is disposed below the tableware storage tank 3 in addition to the water supply pump 8.

A washing water circulation duct 24 is connected to a water reservoir 21 arranged at the bottom of the tableware storage tank, and a copper heater pipe 13 is connected to the other of the washing water circulation duct 24.
From the heater pipe 13 to the washing water circulation duct 19
Is connected to the water supply pump 8. The heater pipe 13 is provided with a heat transfer body 23 made of aluminum die cast and inserted integrally with the heater 12. Heat transfer body 23
Has a semi-cylindrical shape having substantially the same diameter as the diameter of the heater pipe, as shown in FIG. 5, presses the upper surface of the heater pipe 13 from the direction A after inserting the heater pipe 13, and After being brought into close contact with the semi-cylindrical surface of the heat transfer body 23, the portion B is crimped to fix the heater pipe 13 and the heat transfer body 23.

The operation of washing, rinsing with water, rinsing with warm water, and drying of the dishwasher 1 having the above configuration will now be described.

First, in the cleaning operation, the water supply solenoid valve 14 is energized, the tableware storage tank 3 is supplied with cleaning water, and the heater 12 is energized to energize the pump motor 9 to rotate the cleaning runner 20. Then, water is sucked in from the water reservoir 21 disposed at the bottom of the tableware storage tank 3 and the washing water circulation duct 2
4, the heat of the heat transfer body 23 heated by the heater in the heater pipe 13 is supplied to the water, and after the water is heated, the washing water circulation duct 19, the water supply pump 8, the pump outlet 22
Inside lower arm nozzle 10 and Venturi tube 11b
Is supplied to the upper arm nozzle 11 from the venturi tube 11b. Then, the pressure water is directly sprayed from the small holes 10a of the lower arm nozzle 10 to the dishes in the lower basket 5 for storing dishes, and the pressure water is directly injected from the small holes 11a of the upper arm nozzle 11 to the dishes in the upper basket 7 for storing dishes. By spraying, the dirt adhering to these is peeled and dispersed. At this time, the pressurized water from the lower arm nozzle 10 and the upper arm nozzle 11 is sprayed over the entire area in the tableware storage tank. When the washing has been performed for a certain period of time, the energization of the pump motor 9 and the heater 12 is stopped to end the washing operation, and the drainage pump 18 is energized to discharge the washing water in the tableware storage tank 3 out of the machine. .

Next, the rinsing operation is performed by repeating the same operation as the above-described cleaning operation. At this time, the power supply to the heater 12 is performed only in the warm water rinsing operation, and is not performed in other rinsing operations.

Finally, in the drying operation, a blower unit (not shown) is energized to rotate the blower fan, and the tableware storage tank 3 is turned on.
Ventilation flows into the tableware storage tank 3 via a ventilation duct, a heater, and a ventilation passage arranged below the table. At this time, the heater is turned on and off for a certain period of time to change the cold air into the hot air, and this hot air causes water droplets and residual water adhering in the tableware storage tank 3, as well as the tableware. Lower basket 5 for storage
The water droplets attached to the tableware stored in the upper basket 7 are converted into steam and discharged out of the machine through the exhaust duct 15 and the exhaust port 16, but without considering the shortening of the drying time. For models that need to be sufficiently cleaned, the drying process using the heater can be omitted, and the product cost can be reduced by using cold air drying.

If the drying operation has been performed for a certain period of time, the operation of the dishwasher 1 ends.

[0021]

According to the present invention, the heat transfer member and the heater pipe need only be fixed by inserting the heater pipe into the heat transfer member and then caulking. The conventional heat pipe covers the entire heater pipe with the heat transfer member. In this way, the heater pipe is not deformed by the high injection pressure during the heat transfer injection molding, making it easy to manufacture.
Material yield is also very good.

On the other hand, it is not necessary to form the outer circumference of the heater pipe and the inner circumference of the heat transfer body into a perfect circle as in the conventional case where the upper portion of the heater pipe is fixed by screws with a fixed body. Further, by pressurizing the contact surface between the heat transfer body and the heater pipe, the heater pipe is firmly adhered to the semi-cylindrical surface of the heat transfer body while being deformed and adhered to the heat transfer body. There is no need to use a filler with a good heat transfer coefficient.

[Brief description of the drawings]

FIG. 1 is an external view of a dishwasher.

FIG. 2 is a longitudinal sectional view of the dishwasher.

FIG. 3A is a plan view showing a configuration (part 1) of a heater of a conventional dishwasher, and FIG. 3B is a front view of FIG.

FIG. 4A is a plan view showing a configuration (part 2) of a heater of a conventional dishwasher, and FIG. 4B is a front view of FIG.

FIG. 5A is a plan view showing the configuration of a heater of the dishwasher according to the present embodiment, FIG. 5B is a front view of FIG. 5A, and FIG. It is a detailed view of a caulking part.

[Explanation of symbols]

 12: heater, 13: heater pipe, 23: heat conductor.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shoji Kawai 1-1-1 Higashitagacho, Hitachi City, Ibaraki Pref.

Claims (3)

[Claims] 1. A tableware storage tank, a main body which covers the tableware storage tank from the outside and forms an outer shell, a cleaning pump which is a washing water supply means for cleaning the tableware, and a cleaning water circulation path outside the tableware storage tank. In a dishwasher having a heater that changes washing water into warm water, a heating body integrally formed with the heater, and a drainage pump that discharges washing water out of the machine, a washing water circulation path of a heater portion is formed in a pipe shape, The heat transfer body covering the periphery of the heater pipe has a semi-cylindrical shape having substantially the same shape as the diameter of the heater pipe, and the heater pipe and the heat transfer body are fixed by a caulking structure of the heat transfer body. And dishwasher. 2. A tableware storage tank, a main body which covers the tableware storage tank from the outside and forms an outer shell, a cleaning pump as cleaning water supply means for cleaning the tableware, and a cleaning water circulation path outside the tableware storage tank. A heater that changes the washed water into warm water, a heater that takes in outside air and converts it to warm air for drying dishes, a heater that is integrally configured with a heater that changes washing water to warm water, and discharges the washing water out of the machine. In a dishwasher having a drain pump, a washing water circulation path of a heater portion is formed in a pipe shape, and a heat transfer body covering the periphery of the heater pipe is formed in a semi-cylindrical shape having substantially the same shape as the diameter of the heater pipe. A dishwasher characterized in that the heat transfer body is fixed by a caulking structure of the heat transfer body. 3. The heat transfer body according to claim 1, wherein the shape of the heat transfer body having the semi-cylindrical shape is larger than the diameter of the heater pipe, and the heater pipe is fixed to the heat transfer body under pressure. dishwasher.