JP3339550B2 - dishwasher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher and a dishwasher for washing and drying dishes.

[0002]

2. Description of the Related Art Conventionally, a dishwasher of this type has the appearance as shown in FIG. 1, and the structure of parts is as shown in FIG.

That is, a washing tank 2 made of stainless steel or the like is provided inside the main body 1, and water or hot water is supplied into the washing tank 2 by a water supply valve 3.

During operation of the apparatus, the washing water is sprayed from a washing nozzle 5 of the washing tank by a washing pump 4 attached to a lower portion of the washing tank 2 and circulates internally to wash the dishes in the washing tank. I do.

When the washing process is completed, washing water is drained by a drain pump 6 attached to a lower portion of the washing tank.

[0006] In the water supply and drainage processes, the water supply is started after the drainage process is performed in order to drain the water left inside at the start of the process, and the supplied water is heated. Washing is performed while washing, and after washing, dirty washing water is drained.

[0007] Then, after supplying water according to the stroke,
Washing or rinsing is performed, and drainage is repeated.

Heretofore, conventionally, as shown in the process diagram shown in FIG. 3, it is possible to select an operation course such as (strong), (standard) or (quick) depending on the degree of contamination of dishes in an automatic operation course. .

At this time, each course has a configuration in which the characteristics of each course are determined by the time of main washing, the number of times of water rinsing, and the time.
The temperature was constant.

[0010] In the drying only course, FIG.
As shown in FIG. 6, in the drying-only course using hot water rinsing, each course has a configuration in which each course is characterized by hot air or normal temperature blowing time, and the maximum temperature of the hot water rinsing course is a certain time, The temperature was constant.

In the case where only drying by hot air blowing is performed without hot water rinsing, the maximum temperature of hot air blowing during drying is constant.

[0012]

As described above, in the conventional dishwashing, the maximum temperature of the automatic course for rinsing with hot water is 69 ° C.
The setting is constant for about one minute.

[0013] For this reason, there has been a problem that bacteria and the like resistant to high temperatures cannot be sterilized in dishwashing.

For this reason, the dishwasher of the present invention sets an automatic operation course in which a function of including the bactericidal action of germs such as Escherichia coli in the process is set, and the dishwasher can be selected according to a customer's request. is there.

[0015] For example, it is known that a bactericidal action can be obtained for Escherichia coli such as O-157 by performing a bactericidal step at 75 ° C for 1 minute. Accordingly, it is effective to perform a hot water rinsing at a temperature higher than this temperature.

However, when the temperature of hot water is increased to a high temperature, plastic and crystal glass have a problem that they are deformed or discolored.

For this reason, there is a need for a dishwasher capable of setting an automatic course with a different rinsing temperature according to the situation at that time.

Accordingly, an object of the present invention is to provide a dishwasher in which an automatic operation course having a function of including a bactericidal action of bacteria such as Escherichia coli in a process is set and which can be selected according to a customer's request. It is in.

[0019]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is characterized in that two or more types of setting courses can be selected by a switch provided on a panel, and a rinsing step after a step of washing dishes. in dishwasher having a step for execution, any set co Upon operation of the dishwasher
Course and select the previous course for each selected course.
The object of the present invention is to make it possible to select the maximum temperature for rinsing in the rinsing process . The feature of the present invention is that the first
The maximum temperature of the rinsing selected for the panel
Temperature display .

[0020]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing the external shape of a dishwasher according to the present invention, FIG. 2 is a vertical sectional side view shown in FIG.
Is a conventional process diagram, FIG. 4 is a process diagram of the present invention, and FIG.
FIG. 4 is a process diagram of a conventional and exclusive drying course of the present invention with hot water rinsing. FIG. 6 is a process diagram of only the hot air drying without the hot water rinsing in the conventional and dedicated drying courses of the present invention.
1 and 2 indicate the same parts and the same parts.

As shown in FIG. 2, in the dishwasher, a washing tank 2 made of stainless steel or the like is provided inside the main body 1 as described above, and water or hot water is supplied into the washing tank 2 by a water supply valve 3. Is supplied.

During operation of the apparatus, the cleaning water is sprayed from a cleaning nozzle 5 of the cleaning tank 2 by a cleaning pump 4 attached to a lower portion of the cleaning tank 2 and circulated therein.
Wash the dishes stored inside.

When the washing process is completed, washing water is drained by a drain pump 6 attached to a lower portion of the washing tank 2.

If the temperature required for cleaning has not been reached after performing the water supply process required for cleaning, the supplied water is heated while the temperature required for cleaning has already been reached. Rinsing without heating as it is, and after rinsing, drain the dirty rinse water.

At this time, in accordance with the process of each set course, the process of supplying water, washing for a certain period, rinsing for a certain period, and draining is repeated.

Here, in the present invention, the maximum temperature of rinsing can be arbitrarily set for each set course.

At this time, the temperature display L on the panel 7 in FIG.
An optional rinsing maximum temperature may be set by a switch provided with an ED or the like.

As one example, an automatic operation course is added which includes a function of including a bactericidal action of a bacterium such as Escherichia coli in the process, and can be selected according to a customer's request.

FIG. 4 shows a process diagram according to one embodiment.

The automatic course of the process is strong, standard,
It will be three courses quickly.

As a powerful course, an automatic operation course is added which includes a function of including a bactericidal action of a bacterium such as Escherichia coli in the process. To do.

This is because, for E. coli such as O-157, a sterilization step at 75 ° C. for 1 minute is carried out.
It is because it is known that a bactericidal action can be obtained.

As a strong course, it is effective to carry out a hot water rinse at 75 ° C. or higher. Generally, as a warm water rinsing course, in terms of shortening the cleaning cycle time,
It is more effective to set the maximum temperature as high as possible.

This is because if the rinsing temperature is high, only the internal vapor is released during drying, and sufficient drying can be obtained with this residual heat.

However, if the hot water rinsing temperature is raised to a high temperature, there is a problem that plastic and crystal glass are deformed and discolored.

For this reason, in the course, an automatic course in which the rinsing temperature is lowered to about 50 ° C. is set.

As a standard course, the rinsing temperature of an automatic course of about 69 ° C. is set so that heat is not easily applied to ordinary plastic.

In the case where the maximum temperature cannot be set to a very high temperature, it is also effective to extend the holding time of the maximum temperature so as to cope with it.

Generally, the relationship between the sterilization temperature of E. coli and the heating temperature is as shown in FIG. 7, and the lower the temperature, the longer the heating time.

Therefore, the same effect can be obtained by changing the holding time of the maximum temperature of rinsing for each set course.

In the drying-only course, the temperature during drying has not reached the temperature at which the sterilizing effect is increased, and the temperature inside the drying cabinet cannot be increased up to the sterilizing effect temperature.

FIGS. 5 and 6 show process diagrams of a conventional drying only course and an embodiment of the course of the present invention.

As shown in FIG. 5, when the hot water rinsing is carried out on the drying only course, three automatic courses, ie, strong, standard and soft, are used as the automatic course.

It is effective to set the maximum rinsing temperature to about 75 ° C., 69 ° C. and 50 ° C. as described above.

Also, as shown in FIG. 6, even if the drying process is performed only by a hot air fan, changing the maximum temperature of the blower can provide the customer with a germicidal effect or drying of tableware where the temperature is not so high. It is possible to set a drying course according to the request.

In this case, the present invention can be implemented by attaching a temperature sensor inside the main body of the exhaust port 8 shown in FIG. 1 and controlling the blast temperature.

[0048]

According to the present invention, it becomes possible to supply a dishwasher capable of setting an automatic course with a different rinsing temperature according to the situation at that time.

Further, for example, it is possible to obtain a bactericidal action against Escherichia coli such as O-157, and to make it possible to wash dishes and dishes such as plastic and crystal glass which cause deformation and discoloration.

[0050]

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall appearance of a dishwasher according to the present invention.

FIG. 2 is a vertical sectional side view showing an internal structure of a dishwasher according to the present invention.

FIG. 3 is a vertical sectional side view showing an internal structure of a conventional dishwasher.

FIG. 4 is a cleaning process diagram in the present invention.

FIG. 5 is a diagram showing a conventional cleaning process.

FIG. 6 is a process chart of a drying-only course in the conventional method and the present invention.

FIG. 7 is a diagram showing the relationship between the sterilization temperature of E. coli and the heating temperature.

FIG. 8 is a diagram showing a display unit of the panel 7.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body, 2 ... Cleaning tank, 3 ... Water supply valve, 4 ... Cleaning pump,
5: Cleaning nozzle, 6: Drain pump, 7: Panel, 8: Exhaust port.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takashi Tomita 1-1-1, Higashitagacho, Hitachi City, Ibaraki Prefecture Hitachi, Ltd. Electrical Appliances Division, Taga Headquarters (56) References JP-A-2-29231 (JP) , A) JP-A-3-212255 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47L 15/46 A47L 15/42

Claims (2)

(57) [Claims] A switch provided on the 1. A panel, two or more can be selected set course, the dishwasher having a stroke to perform the rinsing operation after the step of washing the dishes, the arbitrary setting course Upon operation of the dishwasher select
A dishwasher, wherein a maximum temperature of the rinsing process can be selected for each of the selected setting courses. 2. A temperature display of a maximum temperature of a selected rinse on the panel.
Dishwasher characterized by performing .