JPH08206054A - Dishwasher - Google Patents

Abstract

PURPOSE: To prevent actuation of a safety device when the atmospheric temp. inside a washing tub remains lower than the specified level, which might occur under influence of the atmospheric temp. when the body of a dish washing machine is in operation. CONSTITUTION: Inside a washing tub 3 to accommodate dishes 2 is heated by a heater 6, and the internal temp. of the tub 3 is sensed by the first temp. sensing means 7, and the operation is stopped by a safety device 8 when the internal temp. of the tub is abnormally high. A control means 13 to actuate the washing, rinsing, and drying operations in sequence stops the operation and notifies the failure in case the atmospheric temp. around the safety device 8 sensed by the second temp. sensing means 12 exceeds the specified range.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for supplying washing water into a washing tank to wash dishes stored in the washing tank and then drying the dishes.

[0002]

2. Description of the Related Art Conventionally, this type of dishwasher has been constructed as shown in FIG. The configuration will be described below.

As shown in the figure, a washing tank 3 for storing the dishes 2 is provided inside the dishwasher main body 1, and washing water is supplied into the washing tank 3 by a water supply valve 4. The cleaning pump 5 discharges cleaning water for cleaning the dishes 2 stored in the cleaning tank 3. Further, a drainage pump (not shown) for draining the wash water in the wash tank 3 to the outside of the machine is provided. A heater (heating means) 6 for heating the cleaning water in the cleaning tank 3 is provided on the bottom surface of the cleaning tank 3, and a first temperature for detecting the temperature of the cleaning water in the cleaning tank 3 is provided under the cleaning tank 3. A detection means 7 is provided.

The safety device 8 is provided in the lower portion of the cleaning tank 3 similarly to the first temperature detecting means 7, and when the heater 6 is continuously operated due to a malfunction of the control device or the like, the ambient temperature in the cleaning tank 3 is increased. When the temperature exceeds a predetermined temperature, the operation is stopped. The control means 9 controls the sequential operation of a series of washing, rinsing, and drying processes, and is provided in the operating section.

The operation of the above structure will be described. When the user places the dishes 2 in the dish basket 10 and stores them in the washing tank 3, and puts detergent into the operation, the residual water in the washing tank 3 is drained by a pump. After operating and draining out of the machine, wash tank 3
The water supply valve 4 is operated to supply water to a predetermined water level. Next, the washing pump 5 and the heater 6 are operated to spray the washing water toward the dishes 2 from the washing nozzle 11 and heat and stir the mixture for a predetermined time. Next, the drainage pump is operated to discharge the cleaning water in the cleaning tank 3 out of the machine through a drainage hose (not shown).

Similarly, in the rinsing process after the cleaning process is completed, water is similarly supplied, and the cleaning pump 5 and the heater 6 are also supplied.
After operating, the draining of wash water to the outside of the machine is repeated 2-3 times. Further, in the drying process after the rinsing process is completed, the heater 6 is operated to heat the inside of the cleaning tank 3. When the ambient temperature in the cleaning tank 3 exceeds a predetermined temperature that can be guaranteed during these operations, the conduction part in the safety device 8 is melted by the heat conducted from the cleaning tank 3 and the operation is stopped.

[0007]

With such a conventional structure, the operating temperature of the safety device 8 becomes unstable because it is easily affected by the ambient temperature during operation of the dishwasher main body. In addition, when the dishwasher body is installed adjacent to a heating device such as a stove, the ambient temperature becomes extremely high due to the influence of the heating device, and the safety device 8 sets the ambient temperature in the cleaning tank 3 at a predetermined level. It has a problem that it operates faster than the operating temperature of.

The present invention solves the above problems and prevents the safety device from operating at an ambient temperature in the washing tank lower than a predetermined temperature due to the influence of the ambient temperature during operation of the dishwasher main body. The first purpose is to do.

A second object is to stabilize the operating temperature of the safety device.

[0010]

In order to achieve the first object, the present invention detects a temperature in the cleaning tank, a cleaning tank for storing dishes, a heating means for heating the inside of the cleaning tank. First temperature detecting means, a safety device for stopping the operation when the temperature inside the cleaning tank is abnormally high, a second temperature detecting means for detecting an ambient temperature around the safety device, and washing, rinsing and drying. And a control means for sequentially operating, wherein the control means stops the operation and notifies an abnormality when the ambient temperature around the safety device detected by the second temperature detection means in the drying process exceeds a predetermined range. This is the first means for solving the problems.

In order to achieve the second object, a washing tank for storing dishes, a heating means for heating the inside of the washing tank, and a first temperature detecting means for detecting the temperature in the washing tank are provided. A safety device for stopping the operation when the temperature inside the cleaning tank is abnormal, a second temperature detection means for detecting an ambient temperature around the safety device, a blower for cooling the atmosphere around the safety device, and a washing device. , Rinsing and drying are sequentially operated, and control means for controlling the air volume of the blower based on the output of the second temperature detecting means, the control means comprising:
The second problem solving means is to change the supply air volume of the blower when the ambient temperature around the safety device detected by the second temperature detection means in the drying process exceeds a predetermined range.

[0012]

According to the first means for solving the above problems, the present invention provides:
In the drying process, when the ambient temperature around the safety device detected by the second temperature detection means exceeds a predetermined range, the operation of the dishwasher is stopped and an alarm is issued to notify the atmosphere during the operation of the dishwasher main body. It is possible to prevent the safety device from operating when the ambient temperature in the cleaning tank is lower than a predetermined temperature due to the influence of the temperature.

Further, according to the second means for solving the problem, when the ambient temperature around the safety device detected by the second temperature detecting means exceeds a predetermined range during the drying process, the amount of air supplied to the blower is changed. As a result, the operating temperature of the safety device can be stabilized.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. The same components as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the second temperature detecting means 12
Detects the ambient temperature around the safety device 8. The control unit 13 sequentially performs washing, rinsing, and drying, and the ambient temperature around the safety device 8 detected by the second temperature detection unit 12 in the drying process is the first predetermined temperature (for example, 60 ° C.). If it exceeds the limit, the operation is stopped and an abnormality is notified. The second temperature detecting means 12 is also used for controlling the drying operation based on the ambient temperature.

The operation of the above structure will be described with reference to FIG. 2. The drying process is started, and the drainage pump is operated for the time determined in step 30 to discharge the residual water. Next, at step 31, the second temperature detecting means 12
It is determined whether the ambient temperature around the safety device 8 is equal to or higher than the first predetermined temperature (60 ° C.) which is a temperature that cannot be guaranteed. If the temperature is equal to or higher than the first predetermined temperature, step 3
The operation is stopped at 2, and the abnormality is notified at step 33.

If the temperature is lower than the first predetermined temperature in step 31, the heater 6 is energized and heated in step 34. Next, in step 35, it is determined whether or not the temperature is equal to or higher than a second predetermined temperature (for example, 80 ° C.) which is the upper limit temperature in the cleaning tank 3 during the drying process. If the temperature is equal to or higher than the second predetermined temperature, the energization of the heater 6 is stopped in step 36. If the temperature is equal to or lower than the second predetermined temperature in step 35, the operation is continued for a predetermined time in step 37.

As described above, according to this embodiment, the control means 1
3 indicates that when the ambient temperature around the safety device 8 detected by the second temperature detecting means 12 in the drying process exceeds the first predetermined temperature, the operation is stopped and the abnormality is notified. It is possible to prevent the safety device 8 from operating when the ambient temperature in the cleaning tank 3 is lower than a predetermined temperature due to the influence of the ambient temperature during the operation of 1.

Next, a second embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the cooling fan (blower) 14 of the cleaning pump 5 is used to cool the atmosphere around the safety device 8. The control means 15 sequentially performs washing, rinsing, and drying, and controls the air volume of the cooling fan 14 based on the output of the second temperature detecting means 12, so that the second temperature detecting means 12 can be used in the drying process.
When the ambient temperature around the safety device 8 detected by the above exceeds a third predetermined temperature (for example, 20 ° C.), the cleaning pump 5 is driven to operate the blower fan 14 to change the supply air amount of the cooling fan 14. I am trying.

The operation of the above structure will be described with reference to FIG. 4. The drying process is started, and the drainage pump is operated for the time determined in step 30 to discharge the residual water.
Next, at step 31, the ambient temperature around the safety device 8 by the second temperature detecting means 12 is the third predetermined temperature (2
It is judged whether the temperature is 0 ° C) or higher. If the temperature is equal to or higher than the third predetermined temperature, in step 39, the cleaning pump 5 is driven to operate the blower fan 14 to blow air, blow wind to the safety device 8, and cool the periphery of the safety device 8. Make the safety device 8 operate more accurately.

If the temperature is equal to or lower than the third predetermined temperature in step 38, the blowing is stopped in step 40, and the heater 5 is energized and heated in step 34. Next, in step 35, it is determined whether or not the temperature is equal to or higher than a second predetermined temperature (for example, 80 ° C.) which is the upper limit temperature in the cleaning tank 3 during the drying process. If the temperature is equal to or higher than the second predetermined temperature, the heater 5 is stopped in step 36. If the temperature is equal to or lower than the second predetermined temperature in step 35, the operation is continued for a predetermined time in step 37.

As described above, according to this embodiment, the control means 1
5 is a blower fan 14 driven by the cleaning pump 5 when the ambient temperature around the safety device 8 detected by the second temperature detection means 12 in the drying process exceeds a predetermined range.
Is operated to blow air, the wind is sent to the safety device 8, and the periphery of the safety device 8 is cooled, whereby the operating temperature of the safety device 8 can be stabilized.

[0024]

As described above, according to the present invention, the washing tank for storing dishes, the heating means for heating the inside of the washing tank, the first temperature detecting means for detecting the temperature in the washing tank, A safety device for stopping the operation when the temperature inside the cleaning tank is abnormally high, a second temperature detecting means for detecting an ambient temperature around the safety device; and a control means for sequentially performing washing, rinsing and drying, When the ambient temperature around the safety device detected by the second temperature detection means exceeds a predetermined range in the drying process, the control means stops the operation and notifies the abnormality, so that the operation of the dishwasher main body is controlled. It is possible to prevent the safety device from operating when the ambient temperature in the cleaning tank is lower than a predetermined temperature due to the influence of the ambient temperature.

Also, a washing tank for storing dishes, a heating means for heating the inside of the washing tank, a first temperature detecting means for detecting the temperature in the washing tank, and a high temperature operation in the washing tank are operated. A safety device for stopping the safety device, a second temperature detecting means for detecting an ambient temperature around the safety device, a blower for cooling the atmosphere around the safety device, and a sequential operation of washing, rinsing, and drying. A control means for controlling the air volume of the blower based on the output of the second temperature detection means, wherein the control means has a predetermined ambient temperature around the safety device detected by the second temperature detection means in the drying process. If it exceeds the range, the supply air volume of the blower is changed, so that the operating temperature of the safety device can be stabilized.

[Brief description of drawings]

FIG. 1 is a sectional view of a dishwasher according to a first embodiment of the present invention.

[Fig. 2] Flow chart of main operation of the dishwasher

FIG. 3 is a sectional view of a dishwasher according to a second embodiment of the present invention.

FIG. 4 is an operation flowchart of main parts of the dishwasher.

FIG. 5 is a vertical sectional view of a conventional dishwasher

[Explanation of symbols]

 2 tableware 3 washing tank 6 heater (heating means) 7 first temperature detection means 8 safety device 12 second temperature detection means 13 control means

Claims (2)

[Claims] 1. A cleaning tank for storing dishes, a heating means for heating the inside of the cleaning tank, a first temperature detecting means for detecting a temperature in the cleaning tank, and an operation when a high temperature in the cleaning tank is abnormal. And a second temperature detecting means for detecting an ambient temperature around the safety device, and a control means for sequentially operating washing, rinsing and drying. A dishwasher configured to stop an operation and notify an abnormality when an ambient temperature around the safety device detected by the second temperature detecting means exceeds a predetermined range. 2. A cleaning tank for storing dishes, a heating means for heating the inside of the cleaning tank, a first temperature detecting means for detecting a temperature in the cleaning tank, and an operation when a high temperature in the cleaning tank is abnormal. A safety device for stopping the safety device, a second temperature detecting means for detecting an ambient temperature around the safety device, a blower for cooling the atmosphere around the safety device, and a sequential operation of washing, rinsing, and drying. A control means for controlling the air volume of the blower based on the output of the second temperature detection means, wherein the control means has a predetermined ambient temperature around the safety device detected by the second temperature detection means in the drying process. A dishwasher in which the amount of air supplied by the blower is changed when the range is exceeded.