JP2014238200A - Hot water supply tank - Google Patents

Abstract

A hot water supply tank capable of continuously discharging hot water suitable for selling hot beverages and saving energy by reducing the tank capacity is provided. A small hot water storage tank 1 discharges hot water heated from drinking water flowing in from an inflow port by energizing an electric heater from a discharge port. Has a discharge port, rectifies the flow of drinking water flowing from the inlet between the inlet and the outlet, and prevents hot water from being stirred and mixed with the drinking water flowing from the inlet A tank body 10 provided with a current plate, and a heater panel 20 having an electric heater, which is disposed in close contact with a side surface of the tank body 10 that faces the current plate disposed surface, and covers the tank body 10 and the heater panel 20. It is comprised from the heat insulating materials 41 and 42. [Selection] Figure 2

Description

  The present invention relates to a hot water supply tank that supplies hot water to a beverage preparation device such as a cup-type vending machine or a beverage dispenser.

  Beverage preparation devices (for example, cup-type vending machines and beverage dispensers) that prepare beverages using raw materials and hot water are known. The cup-type vending machine uses a water reservoir that stores drinking water (cold water) supplied from the water supply, a water supply pump that pumps drinking water stored in the water reservoir, and water that is pumped by the operation of the water pump. A hot water supply tank for storing hot water heated by a heater is provided.

  The coffee beverage prepared by adding sugar and cream in the mixing bowl to the coffee liquor extracted using the hot water supplied from the hot water tank to the ground coffee beans put in the coffee extractor is used by the cup type vending machine Sold to

  The hot water tank covers the top opening of the hot water tank with a top plate to prevent the steam from filling the inside of the machine and to prevent floating substances in the machine from entering the hot water tank. A water level switch and an electric heater that operate in conjunction with a float that moves up and down following fluctuations are attached. When the hot water level drops and the float falls to the lower limit position, the water level switch outputs a water supply start signal to the control unit, and the control unit operates the water supply pump to supply the drinking water stored in the water reservoir to the hot water supply tank. Pump water to feed water. When the level of hot water increases due to the water supply and the float rises to the upper limit position, the water level switch outputs a water supply stop signal to the control unit, and the control unit stops the operation of the water supply pump.

  Further, the hot water tank is provided with a hot water temperature sensor, and the drinking water supplied from the water reservoir is heated by an electric heater to a temperature at which the hot water temperature sensor outputs an upper limit temperature signal (for example, 97 ° C.). It becomes hot water and is stored in a hot water tank. When the beverage selection button provided on the cup type vending machine is pressed and a beverage supply instruction is output, the hot water supply valve provided in the hot water tank is opened to supply hot water to the coffee extractor or mixing bowl. Then, a beverage is prepared using the supplied hot water and raw materials (see, for example, Patent Document 1 and Patent Document 2).

JP 2002-83364 A JP 2008-217553 A

  As described above, the cup-type vending machine cannot maintain the quality (taste, aroma, etc.) of the beverage to be sold when the temperature of the hot water used for preparing the hot beverage is lowered. The sensor detects the temperature of the hot water and outputs a temperature signal to the control unit. The control unit energizes the electric heater based on the temperature signal output from the hot water temperature sensor to cause the hot water to reach a predetermined temperature (for example, 95 ° C to 97 ° C). The hot water supplied from the hot water supply tank to the coffee extractor and the mixing bowl is kept at a high temperature.

  However, even when hot water whose temperature has dropped greatly due to a large supply of drinking water when selling hot beverages, the mixture of drinking water and hot water supplied to the hot water tank will be heated uniformly with an electric heater. High-temperature hot water that can be used for beverage preparation cannot be obtained in a short time.

  Therefore, even if a large amount of drinking water corresponding to the amount of hot water supplied in a short time by hot beverage sales is supplied to the hot water supply tank, there is not enough hot water available for preparation of hot beverages, and hot beverages that can be sold continuously The number decreases.

  In order to prevent such a situation, it is necessary to store a large amount of hot water in a hot water tank and keep it warm during standby for hot beverage sales. As a result, the hot water tank capacity increases (for example, 8000 cc), There was a problem that the amount of power consumption increased due to an increase in the amount of heat released from the tank wall.

  The present invention has been made to solve the above-described problems, and can continuously discharge hot water suitable for selling hot beverages, and can save energy by reducing the tank capacity. It aims at providing the hot-water supply tank which can be planned.

In order to achieve the above object, a hot water supply tank according to claim 1 of the present invention is a small-capacity hot water storage capacity for discharging hot water heated from drinking water flowing in from an inflow port through an outlet by energizing heating means. Hot water tank
The lower end portion has the inlet, and the upper end portion has the discharge port. Between the inlet and the discharge port, the flow of the drinking water flowing in from the inlet is rectified, and from the inlet A tank body provided with a rectifying plate for preventing the hot water from being stirred and mixed with the drinking water flowing in;
A heater panel that is disposed in close contact with the side surface of the tank body that faces the current plate arrangement surface, and that has the heating means;
It is comprised from the heat insulating material which covers the said tank main body and the said heater panel, It is characterized by the above-mentioned.

  The hot water supply tank according to claim 2 of the present invention is the above-described hot water tank according to claim 1, wherein the heater panel is further provided with a hot water temperature sensor based on the hot water temperature detected by the hot water temperature sensor. Control means for energizing the heating means is provided.

  According to a third aspect of the present invention, there is provided the hot water supply tank according to the first or second aspect, wherein the tank body is configured with an inclined surface around the discharge port, and the discharge port is formed on the inclined surface. The heater panel is provided at the upper end, and the heating means is not provided at substantially the same height as the inclined surface.

  According to invention of Claim 1, it is a hot water storage tank of the small capacity | capacitance hot water capacity which discharges the hot water which heated the drinking water which flows in from an inlet_port | entrance by energizing a heating means from an outlet port, The upper end has a discharge port. Between the inlet and the discharge port, the flow of drinking water flowing from the inlet is rectified, and hot water is stirred and mixed with the drinking water flowing from the inlet. A tank body provided with a rectifying plate for preventing this, a heater panel having a heating means disposed in close contact with a side surface of the tank body facing the rectifying plate arrangement surface, and a heat insulation covering the tank body and the heater panel The hot water supply tank capacity can be reduced, for example, from a large capacity of 8000 cc to a small capacity of 200 cc, while maintaining the continuous supply function of hot beverage. Less heat dissipation It is possible to achieve energy saving and it is possible to install the beverage preparation device such as a cup type automatic vending machine and the beverage dispenser in not afford placed destination current capacity.

  Moreover, in the conventional hot water supply tank, the temperature gradient between the heat generating surface (heating means) and the heat receiving medium (cold water) is reduced due to the convection of drinking water (cold water) and hot water, and the heat exchange efficiency deteriorates. It has a drinking water inlet at the lower end and a hot water outlet at the upper end, and the drinking water flowing from the inlet is rectified between the inlet and the outlet to stir the hot water. A rectifying plate is provided to prevent mixing with water, so there is no mixing of cold water and hot water at the time of water supply due to the difference in specific gravity between cold water and hot water, and the temperature of the heating surface (heating means) and the heat receiving medium (cold water) Since the gradient can be maintained at the maximum, high-efficiency heat exchange between the heating means and the cold water is possible. Therefore, even if the hot water tank capacity is set to a small capacity of 200 cc, 150 cc of the hot 200 cc hot water is reduced. 150 cc of potable water supplied by discharging In can be heated and will, be able to maintain a continuous supply function of a hot beverage.

  Furthermore, since the hot water supply tank has a small capacity, the thickness of the heat insulating material can be increased to further improve the energy saving performance, and the hot water tank mounting device can be downsized. Also, the hot water tank can be easily disassembled, and scale removal and maintenance work can be facilitated.

  As described above, it is possible to provide a hot water supply tank that can continuously discharge hot water suitable for selling hot beverages and can save energy by reducing the tank capacity.

  According to the invention of claim 2, the heater panel is further provided with a hot water temperature sensor, and includes a control means for energizing the heating means based on the hot water temperature detected by the hot water temperature sensor. When the hot water temperature detected by the hot water temperature sensor falls to the lower limit temperature (for example, 95 ° C.), the control means heats the drinking water supplied by energizing the heating means, and the hot water temperature reaches the upper limit temperature (for example, When the temperature rises to 97 ° C., control to stop energization of the heating means will not miss the opportunity for the next sale (hot beverage supply).

  According to the invention of claim 3, the tank body is configured with an inclined surface around the discharge port, the discharge port is provided at the upper end of the inclined surface, and the heater panel is located at substantially the same height as the inclined surface. Since no heating means is provided, the gas component accumulated by heating is discharged simultaneously with the discharge of hot water, and scale can be prevented from intensively adhering to the tank body or heater panel. The discharge flow rate can be stabilized.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view which shows the hot water supply tank which concerns on embodiment of this invention, (a) Left view, (b) Front view, (c) Right view. It is front sectional drawing of the hot water supply tank shown in FIG. It is the left view which removed the heat insulating material of the hot water supply tank shown in FIG. It is the right view which removed the heat insulating material of the hot water supply tank shown in FIG. It is the right view which removed the heater panel from the hot water supply tank shown in FIG. It is front sectional drawing which removed the heat insulating material of the hot water supply tank shown in FIG. It is a figure which shows the arrangement | positioning position of the heating means of a heater panel. It is a control block diagram which shows a control structure.

  Hereinafter, a preferred embodiment of a hot water supply tank for supplying hot water to a beverage preparation device such as a cup-type vending machine or a beverage dispenser of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

  1 is an external view showing a hot water tank according to an embodiment of the present invention, FIG. 2 is a front sectional view of the hot water tank shown in FIG. 1, and FIG. 3 is a hot water tank shown in FIG. 4 is a left side view with the heat insulating material removed, FIG. 4 is a right side view with the heat insulating material removed from the hot water tank shown in FIG. 1, and FIG. 5 shows a heater panel from the hot water tank shown in FIG. FIG. 6 is a front sectional view of the hot water tank shown in FIG. 1 from which the heat insulating material has been removed, and FIG. 7 is a view showing the arrangement position of the heating means of the heater panel.

  The hot water supply tank 1 covers the tank main body 10, the heater panel 20, a packing 30 disposed at a joint that fixes the tank main body 10 and the heater panel 20 in close contact, and the tank main body 10 and the heater panel 20. It is comprised from the heat insulating materials 41 and 42 grade | etc.,.

  The tank body 10 has a drinking water inlet 12 at the lower end 11, a hot water outlet 14 at the upper end 13, and a flow dividing plate 12 a at the inlet 12. Further, a conduit 32 communicating with a water reservoir (not shown) via a water supply pump 98 is connected to the inlet 12, and a conduit 34 is connected to the discharge port 14. And between the inflow port 12 and the discharge port 14, the flow of the drinking water which flows in from the inflow port 12 is rectified, and hot water is stirred by the drinking water which flows in from the inflow port 12, and drinking water and hot water mix. A plurality of rectifying plates 15 are provided to prevent this.

  The heater panel 20 is composed of one metal panel, and is fixed to a side surface of the tank body 10 that faces the surface of the rectifying plate 15 that is disposed on the tank body 10 by a bonding means (not shown) via a packing 30. And an electric heater (heating means) 97 is provided. Then, by removing the heater panel 20 from the tank body 10, the scale attached to the tank body 10 and the heater panel 20 can be easily removed, and the maintenance work is facilitated.

As described above, the hot water supply tank 1 is a hot water supply tank having a small capacity and a hot water storage capacity that discharges hot water, which is obtained by heating potable water flowing in from the inlet 12 by energizing the electric heater 97, from the discharge port 14.
Further, a terminal box 21 is attached to the heater panel 20, and a hot water temperature sensor 96 (see FIG. 8) and a heater terminal of the electric heater 97 are installed in the terminal box 21, and a control unit (control means) 90 is provided. When the hot water temperature detected by the hot water temperature sensor 96 falls to the lower limit temperature (eg, 95 ° C.), the potable water supplied by energizing the electric heater 97 is heated, and the hot water temperature reaches the upper limit temperature (eg, 97 ° C.). ), The electric heater 97 is controlled to stop energization.

  In addition, the tank body 10 includes the discharge port 14 around the inclined surface 16, and the discharge port 14 is provided at the upper end portion 13 of the inclined surface 16. The electric heater 97 of the heater panel 20 is substantially the same height as the inclined surface 16. The position is not provided.

  FIG. 8 shows a control block diagram. A control unit (control means) 90 for controlling heating of drinking water, supply of hot water, etc. is a CPU 91 as a central processing unit, and a ROM (read-only) storing a control program for the CPU 91. -Memory) 92, RAM (random access memory: storing hot water heating temperature, etc.) 93 that stores various programs and data necessary for the control of CPU 91, and a reference clock generator (not shown) It comprises a timer 94 that counts clocks to be counted and measures various times, and an energization unit 95 having a power circuit that energizes the electric heater 97.

  The controller 90 is connected to a hot water temperature sensor 96 that detects the temperature of hot water, an electric heater 97 that heats hot water, a water supply pump 98 that pumps potable water stored in a water reservoir to the hot water supply tank 1, and the like. ing.

  And the control part 90 performs control which supplies with electricity to the electric heater 97 based on the hot water temperature which the hot water temperature sensor 96 has detected, and drinks the water pumped by the water supply pump 98 to predetermined temperature (for example, 95 degreeC ~ 97 ° C.).

  As described above, according to the hot water supply tank 1 of the present embodiment, a small-capacity hot water storage capacity for discharging hot water that has heated drinking water flowing from the inflow port 12 through the discharge port 14 by energizing the electric heater 97. The hot water supply tank 1 has an inlet 12 at the lower end 11 and an outlet 14 at the upper end 13, and the flow of potable water flowing from the inlet 12 is between the inlet 12 and the outlet 14. The tank body 10 provided with a rectifying plate 15 for preventing hot water from being stirred and mixed with drinking water flowing in from the inlet 12, and on the side surface of the tank body 10 facing the rectifying plate 15 arrangement surface. A continuous supply function of hot beverage is maintained by the heater panel 20 having the electric heater 97 and the heat insulators 41 and 42 covering the tank body 10 and the heater panel 20 disposed in close contact with each other. Hot water supply For example, the capacity of the battery 1 can be reduced from a large capacity of 8000 cc to a small capacity of 200 cc, and the amount of heat released from the wall surface of the hot water tank 1 can be reduced to save energy. It is possible to install a beverage preparation device such as a cup-type vending machine or a beverage dispenser even at a location where there is no installation.

  Moreover, in the conventional hot water supply tank, the temperature gradient between the heat generating surface (electric heater) and the heat receiving medium (cold water) is reduced due to the convection of drinking water (cold water) and hot water, and the heat exchange efficiency is deteriorated. 1 has a water inlet 12 at the lower end 11 of the tank body 10 and a hot water outlet 14 at the upper end 13, and the drinking water flowing from the inlet 12 is between the inlet 12 and the outlet 14. Since the baffle plate 15 is provided to rectify the flow and prevent the hot water from being mixed with drinking water, there is no mixing of the cold water and hot water at the time of water supply due to the difference in specific gravity between the cold water and hot water. Since the temperature gradient between the electric heater 97) and the heat receiving medium (cold water) can be maintained at the maximum, high-efficiency heat exchange between the electric heater 97 and potable water (cold water) becomes possible. Even with a small capacity of 200cc, the temperature is high It is possible to heat in a short time the supplied drinking water 150cc by discharging 150cc of hot water 00CC, it can be maintained continuously supply function of hot beverages.

  Furthermore, since the hot water tank 1 has a small capacity, the thickness of the heat insulating materials 41 and 42 can be increased to further improve the energy saving performance, and the hot water tank 1 mounted device can be downsized. Moreover, the hot water tank 1 can be easily disassembled, and scale removal and maintenance work can be facilitated.

  In this way, it is possible to provide a hot water supply tank 1 that can continuously discharge hot water suitable for selling hot beverages and can save energy by reducing the tank capacity.

  Further, the heater panel 20 is further provided with a hot water temperature sensor 96, and includes a control unit 90 that energizes the electric heater 97 based on the hot water temperature detected by the hot water temperature sensor 96. When the hot water temperature detected by the hot water temperature sensor 96 falls to the lower limit temperature (for example, 95 ° C.), the potable water supplied by energizing the electric heater 97 is heated, and the hot water temperature is set to the upper limit temperature (for example, 97 When the temperature rises to (° C.), by controlling so as to stop energization of the electric heater 97, the opportunity of the next sale (supply of hot beverage) is not missed.

  In addition, the tank body 10 is configured by the inclined surface 16 surrounding the discharge port 14, and the discharge port 14 is provided at the upper end 13 of the inclined surface 16, and the heater panel 20 is located at substantially the same height as the inclined surface 16. By not providing the electric heater 97, the gas component accumulated by heating can be discharged simultaneously with the discharge of hot water, and scales can be prevented from intensively adhering to the tank body 10 and the heater panel 20, The discharge flow rate of hot water can be stabilized.

DESCRIPTION OF SYMBOLS 1 Hot water supply tank 10 Tank main body 11 Lower end part 12 Inlet port 13 Upper end part 14 Discharge port 15 Current plate 16 Inclined surface 20 Heater panel 41 Heat insulating material 42 Heat insulating material 90 Control part (control means)
96 Hot water temperature sensor 97 Electric heater (heating means)
98 Water supply pump

Claims (3)

It is a hot water storage tank with a small capacity for storing hot water that discharges hot water heated from drinking water flowing in from the inlet by energizing the heating means,
The lower end portion has the inlet, and the upper end portion has the discharge port. Between the inlet and the discharge port, the flow of the drinking water flowing in from the inlet is rectified, and from the inlet A tank body provided with a rectifying plate for preventing the hot water from being stirred and mixed with the drinking water flowing in;
A heater panel that is disposed in close contact with the side surface of the tank body that faces the current plate arrangement surface, and that has the heating means;
A hot water tank comprising: a heat insulating material covering the tank body and the heater panel.   The hot water temperature sensor is further provided in the heater panel, and control means for energizing the heating means based on the hot water temperature detected by the hot water temperature sensor is provided. Hot water tank.   The tank body includes an inclined surface around the discharge port, and the discharge port is provided at an upper end of the inclined surface. The heater panel has the heating means at a position substantially the same as the inclined surface. The hot water supply tank according to claim 1 or 2, wherein the hot water supply tank is not provided.