JPH0949661A - Hot water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent human mistake from occurring by the work at the starting and ending time by a method wherein a shutoff valve for draining is used to discharge water in a hot water supply tank after a circulation pump is operated for specified time length, and a shutoff value for supplying water is opened to supply cold water into the hot water supply tank after the shutoff valve for draining is closed. SOLUTION: This hot water heater is provided with a water pipe 13, a drain pipe 20, a hot water pipe, a circulation pump 24, a water level detection electrode and a heater 15. Then, the hot water heater 10 of a food and drink counter is supplied with water to the full capacity and when the water reaches the full capacity, the circulation pump 24 is operated. After the circulation pump 24 is operated for a specified time length, an opening/closing valve for draining is opened to drain water in the hot water supply tank 10. After the end of draining the water in the hot water supply tank 10, an opening/closing valve for supplying water is opened to supply cold water into the hot water supply tank 10 after while the opening/closing valve for draining is closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply device for supplying hot water or tea to customers at a food and drink counter, and more particularly,
The present invention relates to an automated water heater attached to a food / drink counter such as conveyor belt sushi.

[0002]

2. Description of the Related Art A food and drink counter such as a sushi conveyor provided with a conveyor for transferring food and drink such as sushi, for example, circulates and transfers food and drink such as sushi by a conveyor, while a seat is installed around the food and drink counter, for example, a counter table. The occupying customers are supposed to take out food to be circulated and transported by the conveyor for transporting food and drink, such as sushi and raw meat for yakiniku, and eat it. Since it is done by a machine, it is widely used because it helps save labor at restaurants.

Tea service is indispensable for eating and drinking, for example, sushi at restaurants, and at the food and drink counter, in order to easily and easily provide hot water service such as tea supply to food and drink customers, the seating side of the food and drink counter In addition, a hot-water tap for tea and hot water is provided, this hot-water tap is connected to a hot-water supply device, and the user can press the push button of the hot-water tap to freely pour hot water into the teacup. It is like this. The hot water supply device is equipped with a hot water supply tank equipped with a water supply pipe, a drain pipe, a water level detection electrode and a heater. It is supposed to be supplied.

[0004]

However, in the hot water in the hot water supply tank, after one day, so-called soot is deposited on the bottom, so at the end of work, the hot water in the hot water supply tank is discharged and at the start of work, It is heated again with fresh water. In this way, in order to re-pump the water in the hot water supply tank every day and refresh it, it is necessary to drain the water from the hot water supply tank after the work is finished, and at the latest, at least one hour before the start of work, It is necessary to fill the hot water tank with water and put in the heater switch. Such work is a problem because the work time of the store clerk becomes long. Further, human error such as forgetting to remove water from the hot water supply tank, forgetting to put water in the hot water supply tank, and forgetting to put the heating switch in the hot water supply tank is troublesome to the food and drink customers. An object of the present invention is to solve the problems associated with the work at the start and end of the work of such a conventional hot water supply device.

[0005]

SUMMARY OF THE INVENTION The present invention provides an automatic water heater capable of reliably draining water from the hot water supply tank at the end of work and surely filling the hot water supply tank with water at the start of work and inserting a heating switch to heat the water. The purpose is to provide a food and drink counter. That is, according to the present invention, water is supplied to an empty dry food and drink counter hot water tank provided with a water supply pipe, a drainage pipe, a hot water supply pipe, a circulation pump, a water level detection electrode, and a heater until the water is full. Then, when the water is full, operate the circulation pump, and when the circulation pump has operated for a predetermined time, open the drainage on-off valve to drain the water in the hot water supply tank and drain the water in the hot water supply tank. In the hot water supply method of the food and drink counter, the water supply on-off valve is opened after the closing of the drainage on-off valve to supply water into the hot water supply tank. , Drainage pipe, hot water supply pipe,
At least 24 hours in a food and drink counter equipped with a hot water supply device equipped with a circulation pump, a water level detection electrode and a heater, and a hot water supply pump having a suction side connected to the hot water supply tank and a discharge side connected to a hot water supply pipe An operation timer is provided, which has an input side connected to a power source, one output side connected to respective drive units of the drainage on-off valve and the water supply on-off valve, and a heating device, and the other one. A food / drink counter equipped with a hot water supply device, the output side of which is connected to the input sides of a liquid level detector and a set temperature controller.

In the present invention, in the hot water supply tank of the food and drink counter, before the water is filled and heated at the beginning of work, the drain pipe is closed, the water supply pipe is opened to fill the water in the hot water supply tank, and the circulation pump is operated. , Remove dust and the like attached when the hot water supply pipe and hot water supply tank are empty. In the present invention, the hot water is discharged from the hot water supply tank while the hot water is not cooled. It is preferable that the hot water supply tank is emptied in such a state that the hot water is not cooled, because drying by natural evaporation in the hot water supply tank can be performed relatively quickly. Water is supplied to operate the hot water supply tank by closing the drainage on-off valve at the point when the wash water in the hot water supply tank has been drained, but by opening the water supply on-off valve while closing the drainage on-off valve. . When the drainage in the hot water supply tank is finished, a timer detects that a certain time has elapsed from the time when drainage started or when the water level detector measured that the water surface crossed a specific level. Be seen.

In the present invention, the hot water supply device provided in the food and drink counter includes, for example, a water supply pipe, as in the conventional device.
A hot water supply tank including a drainage pipe, a hot water supply pipe, a circulation pump, a water level detection electrode, and a heater is provided. In the present invention, the hot water supply tank is installed in a frame forming a conveyor path of a food and drink counter such as carousel or a space surrounded by the frame, for example, on the cooking side. In the present invention, the hot water supply device of the food and drink counter is provided with a timer for temporally controlling the hot water supply work of the hot water supply tank.

In the present invention, first to fourth set times are set in the timer. The first set time is the time initially set in the process order, for example, the work start time at the start of work, and the drive units of the drainage on-off valve and the water supply on-off valve and the drive unit of the heating device. Connect to the power supply to start operation. The second set time is the time to start cleaning inside the hot water supply pipe and hot water supply tank, close the drainage on-off valve, open the water supply on-off valve, fill the hot water supply tank with water and start the circulation pump operation. Let The third set time is the time when the cleaning of the hot water supply pipe and the hot water supply tank is completed, the operation of the circulation pump is stopped, the drainage on-off valve is opened, and the wash water is completely discharged from the hot water supply tank. Empty the tank completely. The fourth set time is a fourth set time, for example, a work stop time at the end of work, and is connected to the power source of each drive unit of the drainage on / off valve and the water supply on / off valve, and the drive unit of the heating device. Turn off the valve to stop the operation, open the closed drainage on-off valve, and discharge the hot water in the hot water supply tank.

In the present invention, the first to fourth set times of the timer may be set for one timer or may be set separately for the two timers of the first timer and the second timer. In this case, the first and fourth set times are set in the first timer, and the second and third set times are set in the second timer. In the present invention, the first set time and the second set time can be the same, and the set time set in the timer can be reduced by one.

The timer connects the drainage on-off valve drive section and the water supply on-off valve drive section to a power source and closes the open drainage on-off valve at the first set time. At the second set time following the first set time, the timer cleans the hot water supply tank with the drain opening / closing valve closed in order to perform the cleaning work in the cleaning process in the hot water supply tank. Open the water supply on-off valve to fill the water. At the third set time, the timer opens the drainage on-off valve to drain the wash water in the hot water supply tank after washing. At the fourth set time, the timer disconnects the drainage on-off valve drive unit from the power source, opens the closed drainage on-off valve, and discharges the hot water in the hot water supply tank.

The water supply on-off valve driving unit is turned on by a timer at the first set time, and the opening and closing of the water supply on-off valve can be controlled by the opening and closing operation of the drainage on-off valve. The water supply on-off valve is controlled by the liquid level detector when the drainage on-off valve is closed. That is, in the cleaning work process following the first set time, the closing operation of the drainage on-off valve is confirmed, the water supply on-off valve is opened, and the cleaning water in the cleaning process in the hot water tank is supplied. When the inside of the hot water supply tank is full of water, the liquid level detector closes the water supply on-off valve, but the drainage on-off valve is opened to completely discharge the wash water, and the drain water on-off valve is closed after the wash water is discharged. After confirming the closing operation of the drainage on-off valve, the water supply on-off valve is opened and then controlled by the liquid level detector. At the fourth set time, the power is turned off by the timer and the water supply on-off valve is closed.

In the present invention, the inside of the hot water supply tank and the inside of the piping system connected to the hot water supply faucet can be cleaned in the step of cleaning the inside of the hot water supply tank. In this case, a circulation pump for hot water supply can be provided to forcibly circulate the water in the hot water supply tank for cleaning. The circulation pump starts its operation by the liquid level detector's full water signal in the hot water tank or a water level signal above a certain level,
When opening the drainage on-off valve, stop the operation. In the washing process, the heating device is not connected to the power source,
In the operation process, the liquid level detector detects that the water level is above a certain level in the hot water supply tank, and heating is started.

According to the present invention, a timer is provided and the first to fourth set times are set in the timer, so that the hot water in the hot water supply tank can be discharged, washed, and fully filled, and the hot water can be supplied from the hot water supply tank. It is possible to avoid human error.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings, but the present invention is not limited by the following examples and descriptions. 1 is a schematic side sectional view of a water heater according to an embodiment of the present invention, FIG. 2 is a schematic front sectional view of the water heater shown in FIG. 1, and FIG.
FIG. 3 is a control block diagram of the hot water supply device shown in FIGS. 1 and 2.
FIG. 4 is a partial flowchart mainly showing the operation of the control device at the start of work by the timer of the hot water supply device of the embodiment shown in FIGS. 1 to 3, and FIG. FIG. 5 is a partial flow chart mainly showing control during a washing process of the hot water supply device of the example, and a flow chart following reference numeral A in FIG. 4. FIG. 6 is a partial flowchart mainly showing the control of the drainage motor valve at the start of water supply of the hot water supply apparatus according to the embodiment shown in FIGS. 1 to 3, and is a flowchart following the symbol B in FIG. , Symbols H and I continue to FIG. FIG. 7 shows FIG.
FIG. 9 is a partial flow chart mainly showing control of a water supply solenoid valve at the time of water supply of the hot water supply apparatus of the embodiment shown in FIG. 3, and is a flow chart following the reference symbol C in FIG. 6. FIG. 8 is a partial flow chart mainly showing the control by the water level detector at the time of hot water supply of the hot water supply apparatus of the embodiment shown in FIGS. 1 to 3, and is a flow chart following the reference symbol D in FIG. 7. FIG. 9 is a partial flow chart mainly showing the control of the control device at the end of work of the hot water supply device of the embodiment shown in FIGS.
2 is a flowchart continuing from FIG.
In the figure, the symbol NO indicates a negative route to the question, and the symbol YES indicates a positive route to the question. 1 to 9, the same reference numerals are used for common parts.

1 and 2, a food and drink counter 2 equipped with a crescent flat top chain conveyor 1
A hot water supply tap 5 is attached to the side surface of the frame 3 on the counter table 4 side. In the present example, the hot water supply faucet 5 is connected to a hot water supply branch pipe 7 that branches from a hot water supply circulation pipe 6. Further, in this example, the hot water supply faucet 5 is of a type having an open / close button 8 below, and the open / close button 8 is pressed with a teacup (not shown) to supply water to the teacup.

In this example, the hot water supply device 9 is provided in the frame 3 of the food and drink counter 2. The water heater 9
A hot water supply tank, that is, a hot water supply tank 10, is provided, and a lid member 11 of the hot water supply tank 10 is provided with a water supply pipe 13 having a solenoid valve 12 for water supply.
And a water level detector 14 are provided. A heater 15 is provided below the hot water supply tank 10, and a drain port 17 is provided at the bottom portion 16. Drain 17
An electric ball valve operated by a motor 18, that is, a drain pipe 20 having a drain motor valve 19 is connected to the. The drainage pipe 20 is connected to the overflow pipe 21 at one line and is connected to the remaining line of the T-shaped pipe joint 23 connected to the discharge pipe 22 at the outside. An overflow pipe 21 is provided to prevent the risk of hot water overflowing from the hot water supply tank 10 and causing an accident when the water level in the hot water supply tank 10 exceeds a certain position. The circulation pump 24 sends hot water or water in the hot water supply tank 10 to the water supply circulation pipe 6 through the suction port 25, and the sent hot water or water circulates through the circulation pipe 6 and is discharged from the discharge port 26 to the hot water supply tank. Return within 10.

In the present example, the hot water supply circulation pipe 6 connects the hot water supply branch pipes 7 to the path, and is provided with a circulation pump 24 that constantly operates to supply the hot water supply branch pipes 7 with sufficient hot water. ing. The circulation pump 24 has a suction port 25 opened in the lower portion of the hot water supply tank 10, and a discharge port 26 thereof is connected to the circulation pipe 6. The discharge port 26 of the circulation pipe 6 is also opened in the lower part of the hot water supply tank 10 so as to make the temperature of the hot water in the hot water supply tank 10 uniform.

In this example, the hot water circulation pump 24,
The water supply solenoid valve 12 and the drive unit of the heater 15 are further provided with a water level detector 14 when the electric ball valve of the drain pipe 20, that is, the drain motor valve 19 is closed.
The operation of each is controlled. In this example, the water level detector 14 is provided with four electrodes 27, 28, 29 and 30 forming a circuit.

Of these electrodes, the longest electrode 30 is the cathode and the shortest first electrode 27 is the anode, which acts to detect the water contact and close the electromagnetic valve 12 for water supply. The second shortest second electrode 28 is an anode, and its tip acts to detect the water level (E2) at which the water contacts and to start heating of the heater 15 and operation of the circulation pump 24. The third shortest third electrode 29, that is, the second longest electrode is an anode, and detects the water level (E4) at which the water surface departs from the tip of the third electrode 29 to heat the heater 15 and circulate the pump 2.
4 acts to stop the operation.

FIG. 3 shows a control block diagram in the embodiment shown in FIGS. In this example, the output end 32 of the timer 31 is connected to the power supply input end 34 of the control device 33, and when the timer 31 reaches the set time and connects to the power supply, the control device 33 is turned on. Connecting. The first power supply output end 35 of the control device 33 is connected to the power supply input end 36 of the drainage motor valve 19, and the drainage motor valve 19 is connected to the power supply. Motor valve for drainage 19
The signal output end 37 of the
8 and sends an opening / closing operation signal of the drainage motor valve 19 to the control device to control the second power supply output end 39 of the control device 33 to be ON and OFF. Control device 3
The second power source output end 39 of the third power source 3 is connected via the branch line 40 to the power source input end 41 of the circulation pump 24 and the water supply solenoid valve 12.
Connected to the power source input end 42 of the water level detector 14, the power source input end 43 of the water level detector 14, the power source input end 45 of the controller 44 of the heater 15, and the heater 15 and are provided in the hot water tank 10. It is connected to the power source input terminal 47 of the temperature controller 46. The controller 44 of the heater 15 turns off the power supply input during cleaning and does not operate during cleaning.

Output terminal 48 for control signal of temperature controller 46
Is connected to the first control signal input terminal 49 of the heater 15, and controls the heating of the heater 15 according to the temperature of the hot water in the hot water supply tank. The control signal output end 50 of the water level detector 14 is
It is connected to the second control signal input terminal 51 of the heater and controls the start and stop of the operation of the heater 15. The control signal output end 50 of the water level detector 14 is connected to the water supply solenoid valve 12
Is connected to the control signal input end 52, and by this, the start and stop of the operation of the water supply solenoid valve 12 can be controlled according to the fluctuation of the water level. Further, the control signal output end 50 of the water level detector 14 is connected to the control signal input end 53 of the circulation pump 24, whereby the hot water supply to the hot water supply pipe 6 can be started and stopped according to the fluctuation of the water level. Can be controlled.

Since this example is constructed as described above,
For example, by setting the timer 31 for 24 hours a day,
When the operating time is from 0 o'clock to 10 o'clock at night, the ON contact of the 24-hour timer 31 is set at the start time of 10 o'clock in the morning, and the off contact of the timer 31 is set at the end time of 10 o'clock at night. Set. In this example, at 10 o'clock in the morning, the timer 31 starts the automatic operation of the hot water supply device at the set ON contact, and the washing process is started. When cleaning is performed for a certain period of time, the timer 31 reaches the OFF contact, the water heater stops the automatic operation, and the cleaning process ends. The cleaning process is completed, the timer 31 reaches the ON contact, and the water heater starts automatic operation. At 10 o'clock in the evening, the timer 31 reaches the set off contact and stops the automatic operation of the water heater. After the automatic operation of the water heater is stopped, the timer 31 continues to operate, reaches the ON contact set at 10:00 the next morning, and the water heater restarts the operation (see FIGS. 4 and 9). .

In this example, a timer 31 for 24 hours per round
When reaches the ON contact, the control device 33 is turned on and the control device 33 operates. The control device 33 first turns on the power of the drainage electric ball valve, that is, the drainage motor valve 19, and closes the drainage motor valve 19 that has been opened. In response to the signal that the motor valve 19 for drainage is closed, the controller 33 connects the temperature controller 46, the heater 15, the water level detector 14, the electromagnetic valve 12 for water supply and the circulation pump 24 to the power source to adjust the temperature. The vessel 46, the water level detector 14, the water supply solenoid valve 12 and the circulation pump 24 are brought into an operable state, and the cleaning process starts. The heater 15 has a branch line 40.
Since it is connected to the controller via the control device 44, it is not connected to the power source at the stage of this cleaning process, and therefore, it is not ready to operate.

Thus, the temperature controller 46 and the water level detector 1
4. When the electromagnetic valve 12 for water supply and the circulation pump 24 are made operable, first, the electromagnetic valve 12 for water supply that has been closed is opened to start supplying water into the hot water tank 10. Hot water supply tank 10
When the water level (not shown) inside reaches the tip of the second electrode 28, the second electrode 28 comes into contact with water, and the water contact signal from the second electrode 28 causes the power supply of the circulation pump 24 to be turned on. When turned on, the hot water supply tank 10 and the hot water supply circulation pipe 6 are forcibly circulated for a certain period of time to wash the hot water supply tank 10 and the water supply circulation pipe 6, and after the predetermined time has elapsed, an electric ball valve for draining 24 is opened and the water in the hot water supply tank 10 and the hot water supply circulation pipe 6 is discharged. The control device 33 receives the signal of opening the valve from the drain motor valve 19.
Is a temperature controller 46, a water level detector 14, a water supply solenoid valve 1
2 and the circulation pump 24 are disconnected from the power source to stop the operation (see FIGS. 4 and 5).

After the work in the cleaning process is performed for a certain period of time to discharge the cleaning water in the hot water supply tank 10, the drain motor valve 19 is closed. In response to the valve closing signal from the drainage motor valve 19, the controller 33 connects the temperature controller 46, the heater 15, the water level detector 14, the water supply solenoid valve 12 and the circulation pump 24 to a power source, Get ready for operation.

In this example, the motor 1 of the electromagnetic valve 12 for water supply, the heater 15, the electric ball valve 19 of the drainage port 17
8 and the circulation pump 24 are respectively connected to the output end 32 of the timer 31.
To the second power output 39 of the control device 33 connected to
It is connected through a branch line 40, and the timer causes the control device 33 to turn on the power (not shown) for a predetermined time to start the operation, and to close the open drain motor valve 19 and Upon receiving a signal of closing the valve from the motor valve 19 for water supply, the solenoid valve 12 for water supply, the heater 1
5, motor 18 of drain motor valve 19 of drain 17
And the circulation pump 24 is connected to the power source, and the water supply solenoid valve 1
2, heater 15, drainage motor valve 19 for drainage port 17
The motor 18 and the circulation pump 24 are activated.

In this way, the temperature controller 46, the heater 15,
Water level detector 14, water supply solenoid valve 12 and circulation pump 24
First, the closed water supply solenoid valve 12 is opened to start supplying water into the hot water supply tank 10. When the water level (not shown) in the hot water supply tank 10 reaches the tip of the second electrode 28, the second electrode 28 comes into contact with water, and the water contact signal from the second electrode 28 causes the heater 15
Also, the power of the circulation pump 24 is turned on to heat the water in the hot water supply tank 10 and forcibly circulate in the hot water supply tank 10 and the hot water supply circulation pipe 6 for a predetermined time.

When the water level in the hot water supply tank 10 reaches the tip of the first electrode 27, the first electrode 27 comes into contact with water. The water contact signal from the first electrode 27 causes the water supply solenoid valve 12 to come into contact with the water.
Is closed and water supply to the hot water supply tank 10 is stopped. Hot water supply tank 10
The hot water inside is circulated and consumed by the hot-water supply circulation pipe 6, and when the water level falls below the tip of the second electrode 28, the power-supply solenoid valve 12 is turned on and the hot water supply tank 1
Water supply to 0 is started.

The temperature in the hot water supply tank 10 during operation is measured by the temperature controller 46, and when the temperature of the hot water in the hot water supply tank 10 reaches a predetermined temperature (for example, 80 ° C.), a control signal for the temperature controller 46 is sent. Thus, the heating of the heating device is stopped.
The hot water in the hot water supply tank 10 is circulated and consumed by the hot water supply circulation pipe 6, but at that stage, when the temperature of the hot water in the hot water supply tank 10 drops below a predetermined temperature (for example, 80 ° C.), a temperature controller Heating of the heating device is restarted by the control signal (see FIGS. 6, 7, and 8).

At the end of work, the timer 31
The controller 33 is turned off. When the control device 33 is powered off, the drainage motor valve 19 is powered off,
The drainage motor valve 19 is automatically opened, and the hot water supply tank 1
The hot water in 0 is discharged, and at the same time, the water supply solenoid valve 12
Is turned off, and the water supply solenoid valve 12 is closed.
Further, when the power of the control device 33 is turned off, the temperature controller 4
6, the power of the heater 15, the water level detector 14, and the circulation pump 24 is also turned off, and the operation is stopped (see FIG. 9).

In the present embodiment, a timer is provided so that the temperature controller 46, the heater 15, the water level detector 14, the water supply solenoid valve 12 and the circulation pump 24 can be controlled by the control device and the drainage motor valve. Therefore, it is possible to automatically perform drainage, cleaning, water supply, heating, and hot water circulation of the hot water supply device. In the present example, a drip pan 54 is provided on the counter table 4 below the hot water tap 5.

[0032]

According to the present invention, a timer is provided, and the timer is set to the first to fourth set times or the first to third set times to control the energization of the control device and the drainage motor valve. Compared with the hot water supply device of (1), the hot water in the hot water supply tank can be discharged, washed and filled with water, and hot water can be supplied and prepared from the hot water supply tank more reliably, and the influence of human error can be avoided.

[Brief description of drawings]

FIG. 1 is a schematic side sectional view of a water heater according to an embodiment of the present invention.

FIG. 2 is a schematic front sectional view of the hot water supply device shown in FIG.

FIG. 3 is a control block diagram of the hot water supply device shown in FIGS. 1 and 2.

FIG. 4 is a partial flowchart mainly showing the operation of the control device at the start of work by the timer of the hot water supply device of the embodiment shown in FIGS. 1 to 3;

FIG. 5 is a partial flow chart mainly showing control during a cleaning process of the hot water supply apparatus of the embodiment shown in FIGS. 1 to 3;
FIG. 5 is a flowchart following the reference numeral A in FIG. 4.

6 is a partial flow chart mainly showing control of a drainage motor valve at the time of starting water supply of the hot water supply apparatus of the embodiment shown in FIGS. 1 to 3, and is a flow chart following the reference symbol B in FIG. 5; ,
The symbols H and I continue to FIG.

FIG. 7 is a partial flow chart mainly showing control of a water supply solenoid valve at the time of water supply of the hot water supply apparatus of the embodiment shown in FIGS. 1 to 3, and is a flow chart following reference numeral C in FIG.

8 is a partial flow chart mainly showing control by a water level detector at the time of hot water supply of the hot water supply apparatus of the embodiment shown in FIG. 1 to FIG. 3, and is a flow chart following reference numeral D in FIG. 7.

9 is a partial flowchart mainly showing control of the control device at the end of work of the hot water supply device of the embodiment shown in FIGS. 1 to 3, and is a flowchart following the reference sign D in FIG. G continues to FIG.

[Explanation of symbols]

 1 Crescent type flat top chain conveyor 2 Food and drink counter 3 Frame 4 Counter table 5 Hot water supply faucet 6 Hot water supply circulation pipe 7 Hot water supply branch pipe 8 Open / close button 9 Hot water supply device 10 Hot water supply tank 11 Lid member 12 Water supply solenoid valve 13 Water supply pipe 14 Water level Detector 15 Heater 16 Bottom part 17 Drain port 18 Motor 19 Drain motor valve, electric ball valve 20 Drain pipe 21 Overflow pipe 22 Discharge pipe 23 T-shaped pipe joint 24 Circulation pump, hot water circulation pump 25 Suction port 26 Exhaust port Outlet 27, 28, 29, 30 Electrode 31 Timer 32 Output end 33 Control device 34 Input end for power supply of control device 33 35 Output end for first power supply of control device 36 Input input for power supply of drainage motor valve 19 37 Output terminal for signal of motor valve 19 for drainage 38 Input for power source of control device 33 39 Second output terminal for power source of control device 40 Branch line 41 Input terminal for power source of circulation pump 42 Input terminal for power source of solenoid valve 12 for water supply 43 Input terminal for power source of water level detector 14 44 Heater 15 Connection part 45 Input end of control part 44 of heater 15 Temperature controller 47 Power input end of temperature controller 46 Output end for control signal 49 First input end for control signal of heater 50 Water level detector 14 output terminal for control signal 51 second input terminal for control signal of heater 52 input terminal for control signal of solenoid valve 12 for water supply 53 input terminal for control signal of circulation pump 24

Claims (2)

[Claims] 1. A water supply pipe, a drainage pipe, a hot water supply pipe, a circulation pump,
Supply water to the empty hot water tank of the food and drink counter where the water level detection electrode and heater are installed until the water is full, and when the water is full, operate the circulation pump to circulate the water. When the pump operates for a predetermined time, open the drainage on-off valve to drain the water in the hot water supply tank, and after draining the water in the hot water supply tank, close the drainage on-off valve A hot water supply method for a food / drink counter, characterized in that the water is supplied to the hot water supply tank by opening the water heater. 2. A water supply pipe, a drainage pipe, a hot water supply pipe, a circulation pump,
In a food and drink counter equipped with a hot water supply device provided with a water level detection electrode and a heater, and a hot water supply pump having a suction side connected to the hot water supply tank and a discharge side connected to the hot water supply pipe, a food and drink counter equipped with at least a 24-hour timer The timer is provided with an input side connected to a power source, one output side connected to the respective drive units of the drainage on-off valve and the water supply on-off valve and a heating device, and the other output side. A food / drink counter equipped with a water heater, which is connected to the input sides of a liquid level detector and a set temperature controller.