JP2002300999A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a running cost lower and maintenance less than the case a detergent and rinse agent are used for washing and rinsing dishes. SOLUTION: An electrolytic water forming device 20 for forming alkaline water and acidic water by electrolyzing the aqueous electrolytic solution housed in an electrolytic cell is provided and the alkaline electrolytic water formed by this electrolytic water forming device 20 is supplied through an electrolytic water supply pipe 13 to a rinse water tank 6 (or a washing drum 3) of a dishwasher 1, by which the washing water and rinse water of dishes D are obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a restaurant, a hotel,
The present invention relates to a commercial dishwasher used in a hospital or a lunch center.

[0002]

2. Description of the Related Art Commercial dishwashers used in restaurants, hotels, and the like include a washing room having a structure capable of manually opening and closing the inside, and a washing room arranged in the washing room. Nozzle and rinsing nozzle, a washing tank installed at the lower part of the washing chamber, a rinsing water tank, a circulating pump for supplying washing water stored in the washing tank to the washing nozzle, and a rinsing water tank A rinsing pump that supplies rinsing water to the rinsing nozzle, etc., and a rack containing tableware is put into the cleaning chamber, and then the cleaning chamber is closed. There is a structure in which the washing water is sprayed toward the tableware, and then the rinsing pump is driven to spray the rinsing water from the rinsing nozzle toward the tableware.

In such a dishwasher, a rinsing water tank is generally provided with a heating device such as an electric heater or a gas burner, and the temperature of the rinsing water is raised to a high temperature (80 to 85).
C), sterilization by spraying rinse water and drying of dishes by residual heat.

[0004]

In a commercial dishwasher as described above, a dedicated detergent is generally added to washing water stored in a washing tank. Further, a special rinsing agent is added to the rinsing water, and there is a problem that the running cost of these detergents and rinsing agents is high.

[0005] Further, detergents and rinsing agents used in dishwashers are not commercially available, but are purchased from dedicated manufacturers. When the amount becomes low, it is necessary to perform troublesome work (maintenance) such as ordering from a manufacturer.

[0006] The present invention has been made in view of such circumstances, the running cost is lower than in the case of using a detergent and a rinsing agent in the washing water and the rinsing water, and the maintenance of the washing water and the rinsing water. It is an object of the present invention to provide a dishwasher capable of achieving reduction.

[0007]

DISCLOSURE OF THE INVENTION The dishwasher of the present invention comprises:
A washing tank for storing washing water, a rinsing water tank, a washing nozzle and a rinsing nozzle arranged above the washing tank,
A cleaning circulation pump for supplying the cleaning water in the cleaning tank to the cleaning nozzle, a rinsing pump for supplying the rinsing water in the rinsing water tank to the rinsing nozzle, and a rack arranged above the cleaning tank, In a dishwasher having a structure in which washing water is sprayed from a washing nozzle onto tableware accommodated in the rack, and then rinse water is sprayed from the rinsing nozzle onto the dish, an electrolytic solution having an anode, a cathode, and a diaphragm located between the electrodes is provided. An electrolyzed water generating apparatus that generates alkaline electrolyzed water and acidic electrolyzed water by applying a DC voltage between an anode and a cathode and electrolyzing the electrolyzed aqueous solution in a state in which the electrolyzed aqueous solution is accommodated in the tank, It is characterized by having an electrolyzed water supply pipe for supplying the alkaline electrolyzed water generated by the electrolyzed water generation device to the rinsing water tank.

According to the dishwasher of the present invention, since the alkaline electrolyzed water generated by the electrolyzed water generator is used as the rinsing water, there is no need to use a rinsing agent for rinsing. Further, the alkaline electrolyzed water sprayed onto the tableware from the rinsing nozzle drops downward and accumulates in the cleaning tank, and can be used as cleaning water, so that a detergent for cleaning water is not required.

A dishwasher according to the present invention has a washing tank for storing washing water, a rinsing water tank, a washing nozzle and a rinsing nozzle disposed above the washing tank, and a washing tank for washing the washing water in the washing tank. A circulating pump for cleaning supplied to the nozzle, a rinsing pump for supplying rinsing water in the rinsing water tank to the rinsing nozzle, and a rack disposed above the cleaning tank, for cleaning the dishes contained in the rack. In a dishwasher having a structure in which washing water is sprayed from a nozzle for washing, and then rinse water is sprayed from the rinsing nozzle to the dish, a state in which an aqueous electrolyte solution is accommodated in an electrolytic cell having an anode, a cathode, and a diaphragm located between the electrodes. An electrolyzed water generator that generates alkaline electrolyzed water and acidic electrolyzed water by applying a DC voltage between the anode and the cathode to electrolyze the electrolyzed aqueous solution, Alkaline electrolyzed water produced in generator characterized by that it comprises a electrolytic water supply pipe for supplying to said cleaning tank.

According to the dishwasher of the present invention, the alkaline electrolyzed water generated by the electrolyzed water generator is supplied (added) to the cleaning tank to obtain cleaning water for cleaning the tableware. It is not necessary to use a detergent for cleaning. In addition, since it is not necessary to use a detergent in the washing water, it is not necessary to particularly have an effect of washing the detergent in the rinsing water, and a rinsing agent can be eliminated.

In the above-described dishwasher of the present invention, tap water is supplied to a generation chamber (an alkaline electrolyzed water generation chamber) on the cathode side among the generation chambers formed in the electrolysis tank of the electrolyzed water generation apparatus. Generation chamber on the anode side (acid electrolysis water generation chamber)
It is preferable to supply an electrolytic aqueous solution obtained by adding an electrolyte such as sodium chloride (NaCl) to tap water. The purpose of adding an electrolyte such as sodium chloride to the anode side is to reduce power consumption. The electrolytic water generated from the anode side is discarded or periodically (one time /
Mon) Can be used for cleaning. It can also be used for other purposes (sterilization).

If only tap water is supplied to the generation chamber on the cathode side in this way, the amount of chlorine contained in the alkaline electrolyzed water supplied to the washing tank and the rinsing water tank of the dishwasher is very small ( About the amount contained in tap water). Thereby, the problem in applying the electrolyzed water generation device to the dishwasher, that is, the problem of corrosion of the washing tank and the rinsing water tank by the generated water can be avoided.

Here, in the electrolyzed water generating apparatus used in the present invention, when electrolysis is performed using tap water, the generated alkaline electrolyzed water contains hydroxide ions (OH ⁻ ). By such an operation, dirt attached to the tableware can be removed.

[0014]

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

[Description of Dishwasher] A dishwasher to which the present invention is applied will be described with reference to FIG.

The dishwasher 1 shown in FIG. 1 includes a washing room 2, a washing tank 3 installed below the washing room 2, a dish storage rack 10 disposed in the washing room 2, A cleaning nozzle 4 and a rinsing nozzle 5 provided respectively above and below the arrangement position, a rinsing water tank 6 provided on the side of the apparatus, and a cleaning nozzle 4 for cleaning water stored in the cleaning tank 3.
And a rinsing pump 8 for supplying the rinsing water in the rinsing water tank 6 to the rinsing nozzle 5.

The cleaning chamber 2 is formed by a cleaning chamber cover 2a which is movable in the vertical direction. With the cleaning chamber cover 2a moved upward, the interior of the cleaning chamber 2 is opened to the outside, and the rack 10 can be set in the cleaning chamber 2 through the opening. When the cleaning chamber 2 is closed by lowering the cleaning chamber cover 2a, the cleaning process is started, and the cleaning circulation pump 7 is started.
The rinsing pump 8 is driven by an operation described later.

The washing tank 3 stores washing water. The washing tank 3 is provided with an overflow pipe 3a. The cleaning tank 3 is provided with a heat retaining means (not shown) such as an electric heater or a heat pipe, and the temperature of the cleaning water stored in the tank is maintained at, for example, about 60 to 65 ° C.

An electric heater 9 is installed in the rinsing water tank 6, and the rinsing water in the tank is sterilized to a sterilizing temperature (80 to 80).
85 ° C.).

In the dishwasher 1 having the above structure, the washing room cover 2a is moved upward, the rack 10 accommodating the dishes D is placed in the washing room 2, and the washing room cover 2a is closed. Then, the cleaning circulation pump 7 is driven. The cleaning water in the cleaning tank 3 is supplied to the cleaning nozzle 4 by the driving of the cleaning circulation pump 7, and the shower of the cleaning water spouted from the cleaning nozzle 4 is sprayed on the tableware D in the rack 10. D is washed. The washing water after washing falls down and is stored in the washing tank 3.

After the above washing is completed, the rinsing pump 8 is driven. By driving the rinsing pump 8, the rinsing water in the rinsing water tank 6 is supplied to the rinsing nozzle 5, and the tableware D in the rack 10 is sprayed with the rinsing water shower. By spraying the rinse water, the washing water remaining on the tableware D is removed, and the tableware D is sterilized by heating. After the rinsing is completed, the washing room cover 2a is opened upward, and the dishes D in the washing room 2 are placed in the rack 1.
By taking out every zero, one cycle of the cleaning step is completed. The time of one cycle of the cleaning process (the time from the start of cleaning to the completion of rinsing) is, for example, about 50 to 80 seconds.

[Explanation of Electrolyzed Water Generation Apparatus] An electrolyzed water generation apparatus used in the present invention will be described with reference to FIG.

The electrolyzed water generator 20 has an electrolyzer 21. In the electrolytic cell 21, a pair of electrodes 24 and 25 are arranged so as to face each other. Also, a pair of electrodes 2
A diaphragm 26 is arranged at a position intermediate between 4 and 25, and the inside of the electrolytic cell 21 is separated into two production chambers 22 and 23 by the diaphragm 26. A DC voltage is applied to the pair of electrodes 24 and 25 by a DC power supply (not shown) so that the electrode 25 functions as an anode and the electrode 24 functions as a cathode.

As the pair of electrodes 24 and 25, for example, an insoluble (corrosion resistant) electrode having a titanium substrate coated with a platinum group metal such as platinum or indium is used.
Further, as the diaphragm 26, for example, a porous neutral membrane obtained by coating a fluorocarbon material such as polyvinylidene fluoride or a chlorinated polyethylene as a membrane material on a polyester base material, or a cation exchange membrane is used.

Discharge pipes 221 and 231 are connected to the upper portions of the two generation chambers 22 and 23, respectively. Each generation room 2
Inflow pipes 222 and 232 are connected to lower portions of the pipes 2 and 23, respectively. Flow control valves 223 and 233 are connected to the respective inflow pipes 222 and 232. Each inflow pipe 222, 2
A water supply pipe 31 is connected to 32.

An injection pipe 27 for mixing salt water into tap water flowing through the inflow pipe 232 is connected to the middle of the inflow pipe 232 of the generation chamber 23 on the anode side among the two generation chambers 22 and 23. I have. A saline solution pump 28 and a variable orifice 29 are connected to the injection pipe 27. The injection pipe 27 is connected to a saline solution tank 30 (see FIGS. 3 and 4). The salt solution tank 30 is filled with a sodium chloride solution having a concentration of 20% or a saturated salt solution.

In the above-described electrolyzed water generating apparatus 20, tap water is supplied to the water supply pipe 31 to store the tap water in the cathode-side generation chamber 22, and the inflow pipe 2 of the anode-side generation chamber 23 is provided.
Inject a predetermined amount of saline solution into tap water flowing to 32,
In a state where an aqueous electrolyte solution (containing 0.05 to 0.1% by weight of sodium chloride) is contained in the generation chamber 23 on the anode side of the electrolytic cell 21, the electrode 25 is an anode and an electrode between a pair of electrodes 24 and 25. When a DC voltage is applied such that the cathode 24 becomes a cathode, the aqueous electrolyte solution in the anode-side generation chamber 23 is electrolyzed, and cations such as Na ⁺ and H ⁺ generated by the electrolysis are generated in the anode-side generation chamber. 23 to the cathode-side generation chamber 22
At the same time, Cl ⁻ ,
OH ^- negative ion and the like are collected.

As a result, in the generation chamber 22 on the cathode side, H ⁺ ions are discharged at the cathode to become hydrogen gas and H ⁺
Is consumed and OH ^- ions are relatively increased, so that alkaline electrolyzed water is generated.

Further, in the production chamber 23 on the anode side, OH
^{The −} ions are discharged at the anode to become oxygen gas, the OH ⁻ ions are consumed, and the H ⁺ ions relatively increase, thereby generating acidic electrolyzed water.

The alkaline electrolyzed water and the acidic electrolyzed water are
The water is pushed up by fresh tap water and an aqueous electrolyte solution flowing into each of the generation chambers 22 and 23, and each of them is discharged from the discharge pipe 22.
It flows out outside through 1,231. Therefore, in the electrolyzed water generation device of this example, alkaline electrolyzed water and acidic electrolyzed water can be continuously generated.

Here, in the electrolyzed water generator 20 of FIG. 2, the flow control valve 22 connected to the inflow pipes 222 and 232 is used.
By adjusting the opening degree (flow rate of tap water) of 3, 233 and the set value of variable orifice 29 (the amount of addition of saline), the alkalinity generated in the generation chamber 22 on the cathode side and flowing out of the discharge pipe 221 The concentration (pH) and flow rate of the electrolyzed water
It can be set arbitrarily within a certain range.

The concentration (pH) and the flow rate of the alkaline electrolyzed water are described below in a first embodiment, where the pH is 10: 1.
5 to 11 alkaline electrolyzed water (medium concentration) 2.2 to 5 L
The flow rates of tap water and saline are adjusted so as to be generated at a flow rate of / min. In a second embodiment described later, p
H: 0.1 to 13 alkaline electrolyzed water (high concentration)
Adjust each flow rate of tap water and saline so as to generate at a flow rate of ~ 0.2 L / min.

[Embodiment 1] An embodiment of the present invention will be described with reference to FIG.

In this embodiment, an electrolyzed water generator 20 having the above-described structure is attached to a side surface of the dishwasher 1 shown in FIG. 1, and a saline solution tank 30 is disposed below the electrolyzed water generator 20. are doing. The saline solution tank 30 is connected to the injection pipe 27 (see FIG. 2) of the electrolyzed water generator 20 by a saline solution pipe 3.
2 are connected.

An electrolytic water supply pipe 13 is connected to a discharge pipe 221 (cathode side, see FIG. 2) of the electrolytic tank 21 of the electrolytic water generator 20. The electrolytic water supply pipe 13 communicates with the upper part of the rinse water tank 6. Discharge tube 221 of electrolytic cell 21
The drain pipe 15 is connected to the (anode side).

Tap water at 40 ° C. is supplied to the electrolyzed water generator 20, and tap water is supplied to the generation chamber 22 on the cathode side of the electrolyzer 21. Further, an aqueous electrolyte solution containing a small amount of sodium chloride is supplied to the generation chamber 23 on the anode side. In the electrolyzed water generation apparatus 20, a medium concentration of alkaline electrolyzed water (p
H: 10.5 to 11) and acidic electrolyzed water.

The alkaline electrolyzed water generated by the electrolyzed water generator 20 is supplied to the rinse water tank 6 through the electrolyzed water supply pipe 13 and stored in the rinse water tank 6. The acidic electrolyzed water is drained through a drain pipe 15.

The rinsing water tank 6 has a liquid level sensor 1 for detecting the upper limit level of the level of the alkaline electrolyzed water in the tank.
1 is provided, and the electrolyzed water generator 20 is drive-controlled (ON / OFF control) based on the output of the liquid level sensor 11, so that the liquid level of the rinse water tank 6 is always kept constant. Note that ON / OFF of the electrolyzed water generation device 20 is controlled by a controller (not shown).

In the embodiment shown in FIG. 3, the medium-concentration alkaline electrolyzed water generated by the electrolyzed water generator 20 is stored in the rinsing water tank 6, and the alkaline electrolyzed water is supplied from the rinsing nozzle 5 to the tableware in the rack 10. D is sprayed, so that there is no need to use a rinse agent for rinsing. Further, the alkaline electrolyzed water after rinsing falls down and accumulates in the washing tank 3 and can be used as washing water, so that it is not necessary to use a detergent for washing water.

Here, since the washing tank 3 of the dishwasher 1 is easily soiled, washing of the washing tank 3 is performed periodically (for example, about once a month). In this embodiment, since the acidic electrolyzed water generated by the electrolyzed water generator 20 can be used for cleaning the cleaning tank 3, it is not necessary to use a detergent or the like for cleaning the cleaning tank 3.

[Embodiment 2] Another embodiment of the present invention will be described with reference to FIG.

In this embodiment, an electrolyzed water generator 20 having the above-mentioned structure is attached to the side of the dishwasher 1 shown in FIG. 1, and a saline solution tank 30 is disposed below the electrolyzed water generator 20. are doing. The saline solution tank 30 is connected to the injection pipe 27 (see FIG. 2) of the electrolyzed water generator 20 by a saline solution pipe 3.
2 are connected.

An electrolytic water supply pipe 14 is connected to a discharge pipe 221 (cathode side, see FIG. 2) of the electrolytic tank 21 of the electrolytic water generator 20. The tip of the electrolytic water supply pipe 14 faces above the cleaning tank 3. The drain pipe 15 is connected to the discharge pipe 221 (on the anode side) of the electrolytic tank 21.

Tap water at 40 ° C. is supplied to the electrolyzed water generator 20, and tap water is supplied to the generation chamber 22 on the cathode side of the electrolyzer 21. Further, an aqueous electrolyte solution containing a small amount of sodium chloride is supplied to the generation chamber 23 on the anode side. In this electrolyzed water generation apparatus 20, highly concentrated alkaline electrolyzed water (p
H: 12 to 13) and acidic electrolyzed water are generated.

The alkaline electrolyzed water generated by the electrolyzed water generator 20 is supplied from the electrolyzed water supply pipe 14 to the cleaning tank 3. The acidic electrolyzed water is drained through a drain pipe 15.

The washing tank 3 is provided with an electric conductivity sensor 12 for detecting electric conductivity. Based on the sensor output, the alkali concentration of the washing water in the washing tank 3 is adjusted to pH: 1.
The drive of the electrolyzed water generator 20 is controlled (ON / OFF control) so as to be 0.5 to 11. Note that ON / OFF of the electrolyzed water generation device 20 is controlled by a controller (not shown).

In the embodiment of FIG. 4 described above, tap water is previously stored in the washing tank 3 and high-concentration alkaline electrolyzed water generated by the electrolyzed water generator 20 is added to the above-mentioned concentration value (pH 10). By washing the alkaline washing water of 0.5 to 11) in the washing tank 3, washing water for washing dishes can be obtained. Therefore, there is no need to use a detergent for the washing water. Further, since no detergent is used in the washing water, there is no need to particularly give the effect of washing the detergent to the rinsing water, and it is possible to use simple hot water (80 to 85 ° C.) to which no rinsing agent is added as the rinsing water. .

Here, since the washing tank 3 of the dishwasher 1 is easily soiled, the washing of the washing tank 3 is performed periodically (for example, about once a month). In this embodiment, since the acidic electrolyzed water generated by the electrolyzed water generator 20 can be used for cleaning the cleaning tank 3, it is not necessary to use a detergent or the like for cleaning the cleaning tank 3.

[0049]

As described above, according to the dishwasher of the present invention, the alkaline electrolyzed water generated by the electrolyzed water generator is used for washing and rinsing water of the dish, so that the It is not necessary to use a detergent and a rinsing agent for rinsing water, and the running cost can be reduced. Incidentally, while the running cost of the detergent and the rinsing agent is about 40,000 to 50,000 yen per month, in the dishwasher of the present invention, the running cost (salt cost, electricity cost, etc.) is reduced to 5,000 yen or less per month. be able to.

In addition, there is no need to manage the stock amount of the dedicated detergent and rinsing agent and order the maker, thereby simplifying the maintenance of the dishwasher.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a dishwasher to which the present invention is applied.

FIG. 2 is a diagram showing a configuration of an electrolyzed water generating apparatus used in the present invention.

FIG. 3 is a diagram showing a configuration of an embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 dishwasher 2 washing room 2a washing room cover 3 washing tank 4 washing nozzle 5 rinsing nozzle 6 rinse water tank 7 washing circulation pump 8 rinse pump 9 electric heater 10 rack 11 liquid level sensor 12 electric conductivity sensor 13 , 14 electrolyzed water supply pipe D tableware 20 electrolyzed water generator 21 electrolytic bath 22 generation chamber (cathode side) 221 discharge pipe 222 inflow pipe 223 flow rate control valve 23 generation chamber (anode side) 231 discharge pipe 232 inflow pipe 233 flow control valve 24, 25 electrode 26 diaphragm 27 injection pipe 28 saline pump 29 variable orifice 30 saline tank 31 water supply pipe 32 saline pipe

Claims (3)

[Claims] 1. A cleaning tank for storing cleaning water, a rinsing water tank, a cleaning nozzle and a rinsing nozzle disposed above the cleaning tank, and a cleaning tank for supplying the cleaning water in the cleaning tank to the cleaning nozzle. A circulation pump, a rinsing pump for supplying rinsing water in the rinsing water tank to the rinsing nozzle, and a rack arranged above the washing tank, wherein washing water is supplied from the washing nozzle to the tableware accommodated in the rack. Spraying, and then in a dishwasher having a structure in which rinsing water is sprayed from a rinsing nozzle onto tableware, in a state in which an aqueous electrolytic solution is accommodated in an electrolytic cell having an anode, a cathode, and a diaphragm located between the electrodes, the anode and the cathode. An electrolytic water generating apparatus that generates alkaline electrolyzed water and acidic electrolyzed water by applying a direct current voltage to electrolyze an aqueous electrolytic solution, and an electrolyzed water generated by the electrolyzed water generating apparatus. Dishwasher, characterized in that it comprises an electrolytic water supply pipe for supplying to the rinse water tank alkaline electrolyzed water. 2. A washing tank for storing washing water, a rinsing water tank, a washing nozzle and a rinsing nozzle disposed above the washing tank, and a washing tank for supplying washing water in the washing tank to the washing nozzle. A circulation pump, a rinsing pump for supplying rinsing water in the rinsing water tank to the rinsing nozzle, and a rack arranged above the washing tank, wherein washing water is supplied from the washing nozzle to the tableware accommodated in the rack. Spraying, and then in a dishwasher having a structure in which rinsing water is sprayed from a rinsing nozzle onto tableware, in a state in which an aqueous electrolytic solution is accommodated in an electrolytic cell having an anode, a cathode, and a diaphragm located between the electrodes, the anode and the cathode. An electrolytic water generating apparatus that generates alkaline electrolyzed water and acidic electrolyzed water by applying a direct current voltage to electrolyze an aqueous electrolytic solution, and an electrolyzed water generated by the electrolyzed water generating apparatus. Dishwasher, characterized in that the alkaline electrolyzed water has an electrolytic water supply pipe for supplying to said cleaning tank. 3. A tap water is supplied to a production chamber on the cathode side, and an aqueous electrolytic solution obtained by adding an electrolyte to tap water is supplied to a production chamber on the anode side among the production chambers formed in the electrolytic cell. The dishwasher according to claim 1 or 2, wherein the dishwasher is used.