JPH04231926A - Tableware washing machine - Google Patents

Abstract

PURPOSE:To obtain the tableware washing machine capable of suppressing the generation of putrefaction of leftovers which are left on a leftovers filter after tableware is washed in a washing tank. CONSTITUTION:The tableware washing machine is provided with a feed water mechanism 2 for supplying water to a washing tank 1, a washing mechanism 3 for washing tableware, a leftovers filter 4 for collecting leftovers, and a discharging mechanism 5 for discharging water contained in the washing tank to the outside of the machine, and also, provided with a controller 6 for repeating feed/discharge water at every prescribed time.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher mainly used in households.

0002

2. Description of the Related Art FIG. 4 shows an example of a dishwasher conventionally used in general households. Reference numeral 14 denotes a washing tank for storing and washing dishes, and 15 a water supply mechanism, which is connected to the washing tank 14 and supplies water into the washing tank 14. A washing mechanism 16 sprays water into the washing tank 14 to wash the dishes. A residue filter 17 collects residue at the bottom of the cleaning tank 14. 18
is a drainage mechanism that discharges the water in the cleaning tank 14 to the outside of the machine.

[0003] With the above configuration, the operation of this dishwasher will be explained based on FIGS. 4 and 5. When the dishwasher starts operating, water is supplied from the water supply mechanism 15 to the washing tank 14 and accumulates at the bottom of the washing tank 14. Next, the washing mechanism 16 sprinkles water accumulated at the bottom of the washing tank 14 into the washing tank 14 to wash the dishes. After the cleaning is completed, the drainage mechanism 18 is operated to perform a drainage process in which water in the cleaning tank 14 is discharged to the outside of the machine. At this time, the residue in the washing water is collected on the residue filter 17.

0004

[Problems to be Solved by the Invention] However, the dishwasher having the above-mentioned conventional structure has the following hygienic problems. That is, after the washing is completed and the washing water is drained by the drainage mechanism, the food residue present in the washing water is collected on the residue filter. The food residue collected in this way has a long interval between operations, and if left as is, it will rot on the residue filter and produce a putrid odor. Therefore, this putrid odor fills the washing tank of the dishwasher, causing discomfort to the user. Moreover, it poses a sanitary problem when used as tableware.

[0005] The purpose of the present invention is to solve the above-mentioned problems by providing a clean dishwashing method that can suppress rotting of residue and prevent the generation of rotten odor using the same structure as the conventional one. Its primary purpose is to provide opportunities. In addition, the second objective is to provide a clean dishwasher that can control the amount of water dripped by the dripping mechanism, suppress spoilage of residue with the minimum amount of water necessary, and prevent the generation of putrid odors. .

[0006]

[Means for Solving the Problems] In order to achieve the above object, the first invention provides a washing tank for storing and washing dishes, a water supply mechanism connected to the washing tank and supplying water into the washing tank,
a washing mechanism that sprays water supplied by the water supply mechanism into the washing tank to wash the dishes; a residue filter that collects the residue washed by the washing mechanism at the bottom of the washing tank; and a drainage mechanism for discharging water to the outside of the machine, and water supply by the water supply mechanism and drainage by the drainage mechanism are repeated at regular intervals from the end of operation until the start of the next operation, thereby cleaning the residue on the residue filter. The dishwasher was equipped with a control device.

Further, in the second invention, there is provided a washing tank for storing and washing tableware, a water supply mechanism connected to the washing tank and supplying water into the washing tank, and a water supply mechanism for supplying water to the washing tank. a washing mechanism that sprays water into a tank to wash dishes; a residue filter that collects residue washed by the washing mechanism at the bottom of the washing tank; and a drainage mechanism that discharges water in the washing tank to the outside of the machine. , a dishwasher comprising a dripping mechanism that drips water onto the residue filter, and a control device that drips water with the dripping mechanism from the end of operation until the next start of operation to wash the residue on the residue filter; did.

[0008]

[Function] In the first invention, after the end of the operation, water is supplied by the water supply mechanism and water is drained by the drainage mechanism repeatedly at regular intervals to wash the residue on the residue filter, and in the second invention,
The dripping mechanism washes the residue on the residue filter with the minimum amount of water necessary, washing away bacteria that grow on the residue, as well as the enzymes that hydrolyze organic compounds and create nutrients for bacterial growth. By washing away the decomposition products of organic compounds that cause putrid odors, the decomposition of residue is suppressed and the generation of putrid odors in the cleaning tank is prevented.

[0009]

[Embodiment] An embodiment of the first invention will be explained based on FIG. 1 is a washing tank that stores tableware and washes it; 2
A water supply mechanism is a water supply pump that supplies water into the cleaning tank 1. 3 is a washing mechanism, which is a washing pump that sprays water into the washing tank 1 to wash the dishes. Reference numeral 4 denotes a residue filter, which is disposed at the bottom of the cleaning tank 1 to collect residue in the cleaning tank 1. Further, 5 is a drainage mechanism that sucks water from the bottom of the cleaning tank 1 and drains it to the outside of the machine. Reference numeral 6 denotes a control device which repeats water supply by the water supply mechanism 2 and drainage by the drainage mechanism 5.

The operation of the first embodiment will be explained with reference to FIGS. 1 and 3. When the dishwasher starts operating, water is supplied from the water supply mechanism 2 to the washing tank 1 and accumulates at the bottom of the washing tank 1. Next, the washing mechanism 3 sprinkles the water accumulated at the bottom of the washing tank 1 into the washing tank 1 to wash the dishes. After the cleaning is completed, the drainage mechanism 5 operates to discharge the water in the cleaning tank 1 to the outside of the machine. At this time, the residue in the washing water is collected on the residue filter 4. After a certain period of time has elapsed from the end of the above operation, water is again supplied from the water supply mechanism 2 by the control device 6 and accumulated at the bottom of the cleaning tank 1. The water accumulated at the bottom of the cleaning tank 1 washes the residue on the residue filter 4, and is sucked from the bottom of the cleaning tank 1 by the drainage mechanism 5 and discharged to the outside of the machine. This water supply and drainage operation is repeated at regular intervals until the next operation starts.

As described above, according to the first embodiment, in a structure similar to that of the conventional example, the residue on the residue filter after the end of the operation is repeatedly washed at regular intervals until the start of the next operation, thereby removing the residue. It is possible to suppress putrefaction and prevent the occurrence of putrid odor. The reason why such an effect can be obtained is that, firstly, washing at regular intervals washes away bacteria that grow on the residue, and secondly, the hydrolytic enzymes in the residue decompose organic compounds. This is because it serves as a nutrient source for bacterial growth, but it also has the effect of washing away the enzymes and, thirdly, the effect of washing away the decomposition products of the organic compounds that cause putrid odor. As a result of the above effects, it is possible to suppress the decay of the residue on the residue filter and provide a clean dishwasher that does not generate a putrid odor in the washing tank.

Next, regarding the embodiment of the second invention, FIG.
The explanation will be based on. Reference numeral 7 denotes a washing tank in which tableware is stored and washed, and 8 is a water supply mechanism, which is a water supply pump that supplies water into the washing tank 7. Reference numeral 9 denotes a washing mechanism, which is a washing pump that sprays water into the washing tank 7 to wash the dishes. Reference numeral 10 denotes a residue filter, which is disposed at the bottom of the cleaning tank 7 to collect residue. 11 is the drainage mechanism;
This is a drainage pump that discharges water in the cleaning tank 7 to the outside of the machine. 1
2 is a dripping mechanism that drips water onto the residue filter. 1
3 is a control device that controls the dripping of water by the dripping mechanism 12;

The operation of the second embodiment will be explained based on FIG. 2. The execution operations until the end of the operation are the same as in the first embodiment. In this embodiment, after the operation is completed, water is dripped onto the residue filter 10 by the dripping mechanism 12. The dropped water washes the residue on the residue filter 10,
The water is sucked from the bottom of the cleaning tank 7 by the drainage mechanism 11 and discharged to the outside of the machine. This operation continues until the next time the dishwasher starts operating, and is controlled by the control mechanism 13.

As described above, according to the second embodiment, by providing the water dripping mechanism, the residue on the residue filter after the end of the operation can be continuously washed with the minimum amount of water until the start of the next operation. be able to. Therefore, putrefaction can be effectively suppressed and the occurrence of putrid odor in the cleaning tank can be prevented. The reason why such an effect can be obtained is, first of all,
Continuous washing has the effect of washing away breeding bacteria on the residue.Secondly, the hydrolytic enzymes in the residue decompose organic compounds and serve as a nutrient source for bacterial proliferation, but washing has the effect of washing away the enzymes. Third, it has the effect of washing away the decomposition products of the organic compounds that cause putrid odor. As a result of the above effects, it is possible to suppress the decay of the residue on the residue filter and provide a clean dishwasher that does not generate a putrid odor in the washing tank.

Next, experimental examples for the first embodiment and the second embodiment will be shown. As a method for suppressing spoilage of residue on the residue filter of a dishwasher, 1. Cleaning the residue at regular intervals, 2. Two methods were experimentally investigated: cleaning the residue by dripping water. First of all, 1. We will describe an experimental method for suppressing decay of residue by washing at regular intervals. Place the food residue after washing in the dishwasher in the dishwasher residue basket, set it in the dishwasher after standard use, and drain the water every 4 hours to wash the residue. This for 24 hours (water supply and drainage 6
3) Continuing, measure the number of propagating bacteria on the residue and compare it with the control. Here, the control means that food residues were similarly placed in a dishwasher residue basket, the residue basket was set in the dishwasher after standard use in a standard usage condition, and left at room temperature for 24 hours.

The food residues used were cooked meat pieces (1.8 g each), and the dishwasher used was NP-5600 manufactured by Matsushita Electric Industrial Co., Ltd. Next, 2. We will describe an experimental method for suppressing spoilage of residue by dropping water onto the residue. Food residue after washing in a dishwasher is placed in a dishwasher residue basket, tap water is dripped onto the food residue at approximately 18 ml/min, and the number of bacteria propagating on the residue after 20 hours is measured and compared with a control. Here, the control refers to a case in which food residues were similarly placed in a dishwasher residue basket, the residue basket was set in the dishwasher after standard use in a standard usage condition, and left at room temperature for 20 hours.

The food residues used were cooked meat pieces (1.8 g each), and the dishwasher used was NP-720 manufactured by Matsushita Electric Industrial Co., Ltd. Next, experiment 1.2
．． We will describe the experimental results. The table below shows the results of each bacterial count measurement.

[0018]

[Table 1]

[0019]

[Table 2]

[0020] From the above table, the bacterial growth of the control is 10
8, whereas the number of bacteria in the residue after washing is 1 by washing the residue at regular intervals and by dripping water onto the residue.
It can be suppressed to 06. This is a level at which the generation of putrid odor can be suppressed, and washing the residue by dripping water is sufficiently effective in suppressing the decay of the residue.

[0021]

According to the first aspect of the present invention, since the residue on the residue filter is repeatedly washed by water supply and drainage at regular intervals after the end of operation, decay of the residue can be suppressed with the same structure as before. Moreover, it is possible to provide a clean dishwasher in which no putrid odor is generated in the washing tank. Furthermore, according to the second invention, water is dripped onto the residue using a dripping mechanism to wash the residue, so the amount of water dripping can be adjusted, and rotting of the residue can be effectively suppressed with the minimum necessary amount of water. Therefore, it is possible to provide a clean dishwasher in which no putrid odor is generated in the washing tank.

[Brief explanation of the drawing]

[Fig. 1] A longitudinal cross-sectional view of a dishwasher showing an embodiment of the first invention.

[Fig. 2] A vertical cross-sectional view of a dishwasher showing an embodiment of the second invention.

[Figure 3] Operation process diagram of the dishwasher in the embodiment of the first invention

[Figure 4] Longitudinal cross-sectional view of a conventional dishwasher

[Figure 5] Operation process diagram of a conventional dishwasher

[Explanation of symbols]

1 Washing tank 2
Water supply mechanism 3 Cleaning mechanism
4 Residue filter 5 Drainage mechanism
6 Control device 7 Cleaning tank
8 Water supply mechanism 9 Cleaning mechanism
10 Residue filter 1
1 Drainage mechanism 12
Dripping mechanism 13 control device

Claims (2)

[Claims] Claim 1: A washing tank for storing and washing tableware; a water supply mechanism connected to the washing tank and supplying water into the washing tank;
a washing mechanism that sprays water supplied by the water supply mechanism into the washing tank to wash the dishes; a residue filter that collects the residue washed by the washing mechanism at the bottom of the washing tank; and a drainage mechanism for discharging water to the outside of the machine, and water supply by the water supply mechanism and drainage by the drainage mechanism are repeated at regular intervals from the end of operation until the start of the next operation, thereby cleaning the residue on the residue filter. A dishwasher characterized by being equipped with a control device. 2. A washing tank for storing and washing tableware, a water supply mechanism connected to the washing tank and supplying water into the washing tank,
a washing mechanism that sprays water supplied by the water supply mechanism into the washing tank to wash the dishes; a residue filter that collects the residue washed by the washing mechanism at the bottom of the washing tank; a drainage mechanism for discharging water to the outside of the machine, and a dripping mechanism for dripping water onto the residue filter, and the dripping mechanism drips water from the end of the operation until the start of the next operation to remove the residue on the residue filter. A dishwasher characterized by being equipped with a control device for washing.