JP4653678B2 - Hot water supply system to pre-wash sink tank in dishwasher - Google Patents

Description

  The present invention relates to a hot water supply system to a pre-washing sink tank in a dishwashing apparatus.

  As a commercial dishwashing apparatus used in hotels, inns, restaurants, etc., for example, a conventional example as shown in Patent Document 1 is known.

  The conventional example disclosed in Patent Document 1 includes a pre-washing sink tank for pre-washing dishes and a dishwasher body for washing the pre-washed dishes. The tableware is pre-washed by hand washing, and then the pre-washed tableware is automatically washed by the main body of the dishwasher.

  This type of commercial dishwashing equipment pre-washes dishes in a situation where warm water is supplied to the pre-washing sink tank to fill it up, and hot water continues to be supplied after overflowing, causing it to overflow from the pre-washing sink tank. I put it in a sink tank and wash my hands.

  Here, when supplying warm water to fill the sink tank for pre-washing, it is necessary to fully open the valve and maximize the supply amount of warm water per unit time to quickly fill the water. On the other hand, in order to pre-wash dishes, when hot water is continuously supplied after overflowing and overflowing, it is not necessary to supply the hot water supply adjusting means with the valve fully open. Therefore, the amount of overflow is reduced by reducing the amount of hot water supplied per unit time. And conventionally, the adjustment of the valve has been performed manually by a person.

  However, since the valve is adjusted manually, forgetting to squeeze the valve to reduce the amount of hot water supplied even when the water is full, or the degree of valve adjustment (valve throttle amount) varies depending on the person. In addition, there was a problem that the amount of hot water supplied varies from person to person.

In addition, in hotels, inns, restaurants, etc., the amount of tableware to be washed varies depending on the time of day, so if the amount of hot water supplied for overflow is large or small, etc. In response to this, it is necessary to finely adjust the supply amount by manually operating the valve each time, but it is extremely troublesome to perform manual valve throttling several times a day. The amount of hot water supplied for overflowing is too small or too much due to forgotten adjustment as described above or variations in operation by the operator. Here, if the amount of hot water supplied is too small relative to the amount of tableware to be pre-washed, there is a problem that the hot water in the sink tank for pre-washing is too dirty and the tableware cannot be removed by prewashing. Regardless of the amount of water used, a large amount of hot water is supplied, and the hot water overflows and is discarded, increasing the amount of heat energy and water used, increasing costs and conserving resources and environmental problems. was there.
JP-A-8-182646

  The present invention has been invented in view of the above-described conventional problems, and in the overflow state supply mode to the pre-wash sink tank, it is troublesome to manually adjust the supply amount of hot water according to the amount of tableware In addition, it is possible to supply hot water at an optimum supply amount every multiple time periods, eliminate excessive supply and supply shortage, reduce water consumption and thermal energy, and save resources and energy. It is an object of the present invention to provide a hot water supply system to a pre-washing sink tank in a dishwashing apparatus.

  In order to solve the above-mentioned problems, a hot water supply system to a pre-washing sink tank in a dishwashing apparatus according to the present invention is for washing a pre-washing sink tank 2 for pre-washing tableware 1 and pre-washed tableware 1. The hot water supply system to the pre-washing sink tank 2 in the dish washing apparatus having the tableware washing machine body 3 is provided with hot water supply adjusting means 4 for adjusting the hot water supply to the pre-washing sink tank 2. The control unit 5 for controlling the warm water supply adjustment to the pre-wash sink tank 2 by the warm water supply adjusting means 4 is provided, and the control of the warm water supply adjusting means 4 by the control unit 5 makes the pre-wash sink tank 2 full. Supply mode for supplying hot water to supply water, and supplying preheated sink tank 2 that has become full after the supply mode for full water is over. In order to make the flow low, an overflow state supply mode is provided, and the supply amount of hot water per unit time in the overflow state supply mode is set to be smaller than the supply amount of hot water per unit time in the full water supply mode. The hot water supply adjusting means 4 is controlled to automatically increase / decrease the hot water supply amount in the state supply mode for each of a plurality of preset time zones.

  With this configuration, the controller 5 controls the hot water supply adjusting means 4 to supply hot water to the pre-washing sink tank 2 to fill the water, and then automatically controls the hot water supply adjusting means 4. The supply amount of hot water is reduced and overflowed from the prewash sink tank 2. In the state where the warm water is continuously supplied to the pre-washing sink tank 2 and overflowing, the tableware 1 is put into the pre-washing sink tank 2 and pre-washing is performed. Perform main cleaning. At this time, in the present invention, by controlling the hot water supply adjusting means 4 so as to automatically increase / decrease the hot water supply amount in the overflow state supply mode for each of a plurality of preset time zones, The amount of hot water supplied for overflow is small during the time period when the amount of pre-washing dishes set is small, and because of overflow when the amount of pre-washing tableware set is large The supply amount is automatically controlled at each time period so that a large amount of hot water is supplied, and the optimum supply amount corresponding to the amount of tableware to be pre-washed can be supplied. Therefore, there is no need to manually adjust the hot water supply amount, and the hot water supply amount can be supplied at an optimum supply amount for a plurality of time zones. Eliminate the shortage, the amount of water to reduce the thermal energy, it is possible to save resources, energy saving achieved.

  Further, the pre-wash sink tank 2 is provided with a drain valve 6 and a dirt detection sensor 7 for detecting dirt of hot water in the pre-wash sink tank 2, and the dirt of the hot water in the pre-wash sink tank 2 is detected by the dirt detection sensor 7. It is preferable to control to switch to the full water supply mode by opening the drain valve 6 to automatically drain hot water in the pre-washing sink tank 2 and closing the drain valve 6 after draining. .

  As described above, hot water is supplied to overflow dirty hot water, but if the pre-washing of the tableware 1 is performed in the pre-washing sink tank 2, it accumulates in the pre-washing sink tank 2 over time. The hot water in the pre-washing sink tank 2 is gradually soiled, so when the dirty state of the hot water in the pre-washing sink tank 2 exceeds a predetermined level, it is detected by the dirt detection sensor 7 and the hot water in the pre-washing sink tank 2 can be automatically replaced. it can.

  Since the present invention controls to increase / decrease the amount of hot water supplied for each of a plurality of time zones in the overflow state supply mode to the pre-wash sink tank, the pre-wash is performed according to the place where the dishwasher is installed. Investigate the time period when the amount of tableware to be washed is small and the time period when the amount of tableware to be prewashed is large, divide the time to operate the dishwasher into multiple time zones in advance, and in the time period when the amount of tableware to be washed is small Is set to supply a large amount of hot water supplied for overflow in a time zone when the amount of hot water supplied for overflow is small and the amount of tableware to be washed is large. The supply amount can be automatically controlled, hot water can be supplied at an optimum supply amount that roughly corresponds to the amount of tableware to be pre-washed, and manual adjustment of the hot water supply amount according to the amount of tableware is required. In addition, the work can be simplified and the supply of hot water can be supplied at the optimal supply for each of several time zones, thereby eliminating excessive supply and supply shortage, reducing water consumption and thermal energy, and saving resources. , Can save energy.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  FIG. 1 shows a schematic configuration diagram of a tableware washing apparatus. The dishwasher includes a table 8 for placing dirty dishes 1 to be cleaned, a pre-washing sink tank 2 for pre-cleaning the dirty dishes 1 placed on the table 8, and a sink tank for pre-washing And a dishwasher main body 3 for washing the tableware 1 pre-washed in 2.

  The pre-washing sink tank 2 is provided with a hot water supply unit 9. In the embodiment shown in the accompanying drawings, the hot water supply unit 9 includes a hot water supply pipe 10, a water supply pipe 11, a hot and cold mixing unit 12, and a valve 13 constituting hot water supply adjusting means 4 for adjusting supply of hot water, It is comprised with the discharge part 14. FIG. The hot water mixing unit 12 is for mixing the hot water supplied from the hot water supply pipe 10 and the water supplied from the water supply pipe 11 so as to have a predetermined temperature (about 43 ° C. in the embodiment). The valve 13 constituting the hot water supply adjusting means 4 for adjusting the supply of hot water is opened to discharge hot water having a predetermined temperature in the hot water / mixing unit 12 from the water discharging unit 14 to pre-wash the warm water into the sink tank 2 for pre-washing The water discharge is stopped when the valve 13 is closed and the open state of the valve 13 (that is, the throttling state when the valve 13 is opened) is adjusted to warm water discharged from the water discharge unit 14. The supply amount per unit time can be adjusted.

  Also, the pre-wash sink tank 2 is provided with a detergent injection part 15, and by adjusting the valve 20, the detergent is supplied into the pre-wash sink tank 2 or the detergent supply is stopped. Yes.

  Further, the prewash sink tank 2 is provided with a dirt detection sensor 7 and a full water detection sensor 17 for detecting the dirt of hot water in the prewash sink tank 2. Further, a drain valve 6 is provided in the pre-washing sink tank 2.

  The dishwasher main body 3 has an entrance portion on the side adjacent to the pre-washing sink tank 2 and an exit portion on the other end side. Although not shown inside, the exit from the entrance portion side is omitted. A conveyor is provided on the part side, and the pre-washed tableware 1 put in from the entrance part is transported to the exit part side by the conveyor. In the process of transporting by this conveyor, about 60 ° C. to 80 ° C. The dish 1 is washed with hot water and a detergent, and this washing is repeated over several stages. Finally, the dish is rinsed with warm water or water to reach the outlet.

  FIG. 2 automatically adjusts the amount of restriction in the open / close and open states of the valve 13 which is the hot water supply adjusting means 4 for adjusting the supply of hot water to the pre-washing sink tank 2 in the dishwasher as described above. A control block diagram for performing is shown.

  In the figure, reference numeral 16 denotes a start switch, and an ON / OFF operation signal for the start switch 16 is input to the control unit 5. In the figure, reference numeral 7 denotes a dirt detection sensor which detects the dirt state of the hot water in the pre-washing sink tank 2 and inputs a dirt state detection signal to the control unit 5. In the figure, reference numeral 17 denotes a full water detection sensor which detects whether or not the pre-wash sink tank 2 is full and inputs a detection signal to the control unit 5. The control unit 5 is provided with a clock unit 18. In the figure, reference numeral 19 denotes a setting unit which can set a time zone division for dividing a day into a plurality of arbitrary time zones. In addition, in the setting unit 19, when the dishwasher is operating in the plurality of divided time zones, the supply amount of hot water per unit time in the overflow state supply mode corresponding to each time pair is set. It can be set arbitrarily. Based on the setting contents set by the setting unit 19 and information from the full water detection sensor 17 and the dirt detection sensor 7, the control unit 5 controls the opening / closing of the valve 13 described above, the adjustment control of the degree of opening in the case of opening, the valve 20. Open / close control and drain valve 6 open / close control.

  In the present invention, the control of the valve 13 which is the hot water supply adjusting means 4 by the control unit 5 is for stopping the supply of hot water to the prewash sink tank 2 and for filling the prewash sink tank 2 with water. There are three basic modes: a full-water supply mode for supplying hot water to the tank and an overflow state supply mode for supplying hot water to the pre-wash sink tank 2 that has become full after the full-water supply mode is completed and causing the overflow to overflow. is doing.

  The stop mode is a mode in which the supply of hot water is stopped by closing the valve 13. The full water supply mode is a mode in which the valve 13 is fully opened, and the supply amount of hot water per unit time is set to the maximum supply amount. The overflow state supply mode is a mode in which the valve 13 is opened, but the open amount of the valve 13 is reduced so that the supply amount of hot water per unit time is smaller than that in the full water supply mode. .

  Here, in the present invention, as described above, one day is divided into a plurality of time zones and set, and therefore, the overflow state supply mode is further set to each set time zone. Each is divided into an overflow state division supply mode. Then, the setting unit 19 adjusts the supply amount of hot water (that is, the throttle amount in the opened state of the valve 13) for each overflow state division supply mode corresponding to each of the plurality of time zones thus divided. It can be set freely.

  A dishwasher is installed to divide the day into any number of time zones and to set the amount of hot water used for overflow in each overflow status category supply mode corresponding to multiple time zones. For example, the day is divided into hourly time zones, and the supply amount of overflow hot water per unit time is set for each time zone. In this case, for example, when the dishwasher is operated from 6 am to 11 pm, it is not in operation from midnight to 1 am, or from 1 am to 2 am Band: In the time zone from 5:00 am to 6:00 am and the time zone from 11 pm to 12:00 pm, the setting of the amount of hot water for overflow per unit time is set to zero. Even during driving, there are many times when there is a lot of pre-washed tableware 1, for example, 7am to 8am, 8am to 9am, 9am to 10am, 0pm to 1pm , 1pm to 2pm, 6pm to 7pm, 7pm to 8pm, 8pm to 9pm, 9pm to 10pm, breakfast and lunch Since it is a time zone for pre-washing the tableware 1 used for dinner, a large amount of supply is set during this time zone, and among these, the increase / decrease of the supply amount is set for each time zone according to the situation at the site. These settings are performed by operating the setting unit 19. In the above example, an example is shown in which one day is divided into time zones every hour, but the present invention is not necessarily limited to this, and one day may be divided into a plurality of other time zones.

  In using the dishwashing apparatus of the present invention, the setting unit 19 sets the day to be divided into a plurality of time zones as described above, and hot water is supplied for each overflow state division supply mode corresponding to each time zone. Set the supply amount. When the start switch 16 is off in this state, the stop mode is closed with the valve 13 closed. Here, when the start switch 16 is turned on, the drain valve 6 is closed and the control unit 5 is controlled so that the valve 13 is fully opened to enter the full water supply mode, and the warm water is automatically supplied to the pre-wash sink tank 2. Is supplied. When the pre-wash sink tank 2 becomes full, the full water detection sensor 17 detects it, and the valve 13 is controlled to switch from the full water supply mode to the overflow state supply mode. In this case, since the control unit 5 is provided with the clock unit 18, the control unit 5 determines which time zone among the plurality of time zones set in advance by the control unit 5 and corresponds to the corresponding time zone. The throttle amount in the open state of the valve 13 is automatically adjusted and controlled so as to be the overflow state segment supply mode to be set to the hot water supply amount of each corresponding overflow state segment supply mode. As a result, in the corresponding time zone, a preset supply amount of hot water is supplied to the fully-washed pre-wash sink tank 2 and hot water in the pre-wash sink tank 2 overflows and is discharged by the same amount as the supply amount. . In this state, the used dirty tableware 1 placed on the table 8 is placed in the pre-washing sink tank 2 and pre-washing work is performed. In this case, the valve 20 is opened and the detergent is injected into the pre-wash sink tank 2 from the detergent injection portion 15. The detergent injection amount is preferably proportional to the hot water supply amount in the overflow condition section supply mode, and the detergent injection amount is preferably supplied at regular intervals. In this case, the opening and closing of the valve 20 is controlled by the control unit 5.

  In a certain time zone set in advance as described above, the amount of hot water set in the overflow state division supply mode corresponding to the corresponding time zone is continuously supplied, but when moving from this time zone to the next time zone, Then, the controller 5 controls the valve 13 so that the opening amount of the valve 13 is automatically adjusted so that the amount of hot water set in the overflow state section supply mode corresponding to the next time zone is supplied.

As described above, in the present invention, the opening of the valve 13 constituting the hot water supply adjusting means 4 is automatically increased or decreased for each of a plurality of preset time zones in the overflow state supply mode. Control is performed by the control unit 5 so as to adjust the amount, thereby increasing the supply amount per unit time of hot water supplied for overflow in the time zone when the amount of the tableware 1 to be prewashed is large. In the time zone when the amount of the tableware 1 to be pre-washed is small, the supply amount of hot water supplied for overflow is reduced per unit time. When pre-washing in 2, the hot water in the pre-wash sink tank 2 can always be kept at a quality suitable for pre-washing,
It will be adjusted to the optimal hot water supply amount for overflow corresponding to the amount of tableware 1 for each time zone, and there is no need to manually adjust the hot water supply amount according to the amount of tableware. In addition, it is possible to supply hot water at an optimum supply amount for each of a plurality of time zones, eliminate excessive supply and supply shortage, reduce water usage and thermal energy, and save resources and energy.

  The tableware 1 pre-washed in the pre-wash sink tank 2 is sent to the dishwasher main body 3 for main cleaning.

  By the way, as described above, a day is divided into a plurality of time zones, and even if the hot water supply amount is set in advance for each overflow state division supply mode corresponding to each time zone, the tableware more than planned in a certain time zone. Sometimes it may be necessary to pre-wash one. In such a case, since the number of dishes 1 corresponding to the preset amount of hot water in a preset time zone is pre-washed, the hot water in the pre-wash sink tank 2 becomes dirty and the pre-wash is sufficient. There is a risk that it will not be possible.

  Therefore, in the present invention, the contamination state of the hot water in the pre-washing sink tank 2 is detected by the contamination detection sensor 7, and the contamination of the warm water in the pre-washing sink tank 2 is more than a predetermined contamination by the contamination detection sensor 7. When this is detected, the control unit 5 stops the overflow state supply mode, opens the drain valve 6 and controls to automatically drain the hot water in the pre-wash sink tank 2. When draining of warm water in the pre-washing sink tank 2 is completed, this is detected by a drainage detection sensor (not shown), and the valve 13 is fully opened by closing the drain valve 6 and switching to the full water supply mode. Control is performed by the control unit 5. As a result, the pre-wash sink tank 2 is filled with water, and the control unit 5 controls again so as to automatically shift from the full water supply mode to the overflow state supply mode in the same manner as described above. Is done.

  Further, when the start switch 16 is turned off, the control unit 5 controls the valve 13 so as to shift to the stop mode and close the valve 13 regardless of whether the time is the overflow state supply mode or the full water supply mode. The At the same time, the drain valve 6 is opened and the hot water in the pre-washing sink tank 2 is automatically drained.

It is a schematic block diagram of the tableware washing apparatus of this invention. It is a control block diagram same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tableware 2 Pre-washing sink tank 3 Tableware washing machine main body 4 Hot water supply adjustment means 5 Control part 6 Drain valve 7 Dirt detection sensor

Claims (2)

  A hot water supply system for a pre-washing sink tank in a dishwashing apparatus comprising a pre-washing sink tank for pre-washing dishes and a dishwasher body for washing pre-washed dishes, A hot water supply adjusting means for adjusting the supply of hot water to the sink tank is provided, a control unit for controlling the adjustment of the hot water supply to the sink tank for pre-washing by the hot water supply adjusting means is provided, and the hot water supply adjusting means by the control part To supply the hot water to fill the pre-wash sink tank, and to supply the hot water to the pre-wash sink tank that has become full after completion of the full water supply mode to overflow. Overflow state supply mode, and the amount of hot water supplied per unit time in overflow state supply mode Supply hot water so that the supply amount of hot water in the supply mode is less than the supply amount per unit time, and the supply amount of hot water in this overflow state supply mode is automatically increased or decreased at each preset time zone. A hot water supply system to a sink tank for pre-washing in a dishwashing apparatus, wherein the adjusting means is controlled. The pre-wash sink tank is equipped with a drain valve and a dirt detection sensor for detecting the dirt of warm water in the sink tank for pre-wash, and the dirt of the warm water in the sink tank for pre-wash is more than specified by the dirt detection sensor. 2. A dishwashing apparatus according to claim 1, wherein when the water is detected, the drain valve is opened to automatically drain hot water in the pre-wash sink tank, and after draining, the drain valve is closed to switch to the full water supply mode. Water supply system to the pre-wash sink tank

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