JP3159408U - Hot water tank - Google Patents

Abstract

An object of the present invention is to provide a hot water tank which prevents the adhesion of chalk on an electric heater and reduces the frequency of cleaning. The potable water supplied to a tank body is heated by an electric heater, and hot water stored between an upper limit water level and a lower limit water level is opened, and a hot water supply valve is opened. In the hot water tank 20 to be supplied, the hot water that prevents the draft area K that repeats submersion and exposure from hot water whose water level fluctuates at least between the upper and lower water levels in the electric heater 22 from coming into contact with the hot water is prevented. A contact prevention cover 28 is provided by being attached to the top plate 21a of the tank body 21, and a joining portion 28a of the hot water contact prevention cover 28 with the electric heater 22 is fixed so as to be watertight. [Selection] Figure 2

Description

  The present invention relates to a hot water tank that is provided in a cup-type vending machine, a tea dispenser, or the like and supplies hot water that is stored and heated for drinking water to a beverage cooking unit.

  2. Description of the Related Art A hot water tank that is provided in a cup-type vending machine, a tea machine, or the like and that stores hot water by storing drinking water and supplying it to a beverage cooking unit has been known. For example, FIG. 3 of Patent Document 1 includes a coffee bean canister that stores roasted coffee beans, a mill that grinds coffee beans supplied from the coffee bean canister to a predetermined particle size with a pulverizing blade, A coffee brewer that extracts a coffee liquid containing coffee components by filtering a mixed liquid of ground beans supplied from the mill and hot water supplied through a hot water pipe by opening a hot water supply valve of the hot water tank through a paper filter, Powdered canister for storing sugar and cream, coffee liquid extracted from coffee brewer mixed with sugar and cream supplied from powdered canister, hot water supplied from hot water tank if necessary and coffee drink A beverage system diagram of a cup-type vending machine including a mixing bowl or the like is disclosed.

  Further, as shown in FIG. 4, a hot water tank 50 that supplies hot water to a beverage cooking unit such as a coffee brewer or a mixing bowl guides drinking water supplied from a water supply or the like to the bottom 21 b of the tank body 21. Based on the hot water temperature detected by the temperature sensor 27, the water supply pipe 24 which discharges and supplies water from the water supply port 24a, the water supply valve 23 which is provided in the middle of the water supply pipe 24 and opens and closes the valve to supply drinking water. An electric heater 22 that heats the stored hot water to keep it at a predetermined temperature, a hot water supply pipe 26 that guides the stored hot water to the beverage cooking unit, and is provided in the middle of the hot water supply pipe 26 to supply hot water by opening and closing the valve The high water level switch 25 is provided on the top plate 21a of the tank body 21 and detects a vertical movement of a float 29 that moves up and down in conjunction with a change in the amount of hot water stored in the tank body 21 and outputs a water level signal. 29a, and a low level switch 29 b, and the like.

  And drinking water (for example, tap water) is supplied from the water supply port 24a of the water supply pipe 24 to the bottom 21b of the tank body 21 when the water supply valve 23 is opened. The drinking water supplied to the bottom portion 21b of the tank body 21 is heated to a high temperature until the temperature sensor 27 detects an upper limit temperature set value (eg, 97 ° C.) when the electric heater 22 is energized. And stored at a predetermined temperature (eg, 97 ° C. to 95 ° C.). The hot water stored in the hot water tank 50 is supplied from the hot water supply pipe 26 to a beverage cooking unit such as a coffee brewer or a mixing bowl when the hot water supply valve 25 is opened when cooking a hot beverage such as coffee. Used for cooking hot beverages.

  Thus, when cooking of a hot beverage is performed, hot water stored in the hot water tank 50 is supplied from the hot water supply pipe 26 to the beverage cooking unit. When the amount of hot water stored in the hot water tank 50 decreases and falls to the lower limit water level, the low water level switch 29b outputs a lower limit water level signal to the control unit (not shown) by the lowering of the float 29 linked to the fluctuation of the water level. To do. When receiving the lower limit water level signal from the low water level switch 29b, the control unit opens the water supply valve 23 and supplies drinking water to the hot water tank 50. When drinking water is supplied and the amount of hot water rises to the upper limit water level, the high water level switch 29a outputs an upper limit water level signal due to the rise of the float 29 linked to the fluctuation of the water level, and the control unit closes the water supply valve 23 and stops water supply.

JP 2002-56452 A

However, depending on the place where the cup-type vending machine or tea machine is installed, tap water may contain a large amount of chlorinated components.
Then, the hot water supply valve 25 is opened and high temperature hot water stored in the hot water tank 50 is supplied to the beverage cooking unit and lowered to the lower limit water level, and the water supply valve 23 is opened and drinking water (tap water) is supplied. When the water level fluctuation of the high temperature hot water in which the stored high temperature hot water rises to the upper limit water level is repeated, the draft area K of the electric heater 22 that repeatedly submerges in the high temperature hot water and exposes from the high temperature hot water becomes dry and wet. Since the state is repeated, as shown in FIG. 4, the kerki adheres to the draft region K of the electric heater 22 in contact with the draft surface at the lower limit water level from the upper limit water level of hot water whose water level fluctuates. There was a problem that it is necessary to periodically clean.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a hot water tank that reduces the frequency of cleaning by preventing the adhesion of chalk to the electric heater.

The invention according to claim 1 opens the water supply valve, heats the potable water supplied to the tank body with an electric heater, and opens the hot water valve to keep hot water stored between the upper limit water level and the lower limit water level. In the hot water tank supplied
A hot water contact prevention cover is provided that prevents a drafting area that repeats submergence and exposure from hot water whose water level fluctuates between at least the upper limit water level and the lower limit water level of the electric heater from contacting the hot water. This is a hot water tank characterized by that.

The invention according to claim 2 is the hot water tank according to claim 1, wherein the hot water contact prevention cover is attached to a top plate of the tank body.
The invention according to claim 3 is the hot water tank according to claim 1, wherein the hot water contact prevention cover is a hot water contact prevention pipe covering the periphery of the electric heater.

  According to the present invention, the potable water supplied to the tank body is heated with an electric heater by opening the water supply valve, and hot water stored between the upper limit water level and the lower limit water level is supplied by opening the hot water supply valve. In the hot water tank, the hot water contact for preventing the draft area that repeats the submersion and the exposure from the hot water at least between the upper limit water level and the lower limit water level in the electric heater from contacting the hot water. A protective cover is provided.

The hot water contact prevention cover is attached to the top plate of the tank body.
Furthermore, the hot water contact prevention cover is a hot water contact prevention pipe covering the periphery of the electric heater.

  Since it comprises in this way, the hot water tank which prevented the chalk adhesion of the electric heater and reduced the frequency of cleaning can be provided.

Beverage system diagram of cup-type vending machine with hot water tank in the embodiment of the present invention Cross-sectional view of a hot water tank according to Embodiment 1 of the present invention Cross-sectional view of a hot water tank according to Embodiment 2 of the present invention Cross-sectional view of a conventional hot water tank

Hereinafter, an embodiment of a hot water tank according to the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is used regarding the same structure as the past.
(Embodiment 1)
FIG. 1 is a beverage system diagram of a cup-type vending machine provided with a hot water tank according to an embodiment of the present invention, and FIG. 2 is a sectional view of the configuration of the hot water tank according to Embodiment 1 of the present invention. The cup-type vending machine 1 illustrated here cooks a hot beverage or a cold beverage according to a user's selection after inserting coins, and pours it into a cup C placed on a bend stage 47. . In the machine, there are a water reservoir 12, a cooling water tank 15, a carbonator 18, an auger type ice making machine 19, a hot water tank 20, a coffee bean canister 41, a mill 42, a coffee brewer (coffee extraction device) 43, a powder raw material canister 44, a mixing bowl. 45, etc.

  The water reservoir 12 is for supplying drinking water (tap water) to the carbonator 18, the auger ice making machine 19, and the hot water tank 20. When the water inlet valve 11 is opened, the drinking water is stored in the water reservoir 12, When the pump 13 is operated and the water supply valve 23 is opened, drinking water is supplied from the water supply pipe 24 to the hot water tank 20.

  The carbonator 18 is immersed in the cooling water tank 15 and dissolves the carbon dioxide gas supplied from the carbon dioxide gas cylinder 16 in the drinking water supplied from the water reservoir 12 to produce carbonated water. The syrup tank 17 pours syrup into the cup C from the nozzle 46 with the pressure of carbon dioxide supplied from the carbon dioxide cylinder 16.

  The auger type ice making machine 19 has an ice making unit and an ice storage, and the drinking water supplied from the water reservoir 12 is made in the ice making unit, stored in the ice storage, and stored in the ice storage when selling iced beverages. Supply ice to cup C.

  As shown in FIG. 2, the hot water tank 20 includes a tank body 21 for storing hot water, and an electric heater 22 (for example, 1000 W) that heats the stored hot water and maintains it at a predetermined temperature (for example, 97 ° C. to 95 ° C.). When the water pump 13 is operated and the water supply valve 23 is opened, the drinking water supplied from the water reservoir 12 is led to the bottom 21b of the tank body 21 and discharged and supplied from the water supply port 24a. When the hot water supply valve 25 is opened at the upper portion, the hot water stored in the hot water pipe 26 is introduced to the beverage cooking unit such as the coffee brewer 43 and the mixing bowl 45, and the temperature of the stored hot water is detected. Is provided.

  Further, a hot water contact prevention cover 28 for preventing hot water stored in the hot water tank 20 from coming into contact with the draft area K of the electric heater 22 is attached to the top plate 21 a of the tank body 21 around the electric heater 22. . The hot water contact prevention cover 28 is provided in the range from the upper limit water level dimension T1 of hot water to the lower limit water level dimension T2 below, and the joining portion 28a with the electric heater 22 is fixed so as to be watertight. Further, the top plate 21a of the tank body 21 operates in conjunction with the float 29 that moves up and down in conjunction with changes in the amount of stored hot water, and when the hot water rises to the upper limit water level, an upper limit water level signal is sent. There is provided a high water level switch 29a for outputting, and a low water level switch 29b for outputting a lower limit water level signal when the amount of hot water decreases to the lower limit water level.

  When a user inserts money into the cup-type vending machine 1 and presses a selection button for a hot beverage, for example, a selection button for a hot coffee beverage, the coffee bean canister 41 supplies the coffee beans to the mill 42. The ground beans ground at 42 are supplied to the coffee brewer 43. When the hot water supply valve 25 is opened, hot hot water stored in the hot water tank 20 is supplied to the ground beans in the coffee brewer 43 through the hot water supply pipe 26. In the coffee brewer 43, a mixture of ground beans and hot water is obtained. When this mixture is filtered with a paper filter, a coffee liquid containing a coffee component is extracted. The coffee liquid extracted by the coffee brewer 43 is supplied to the mixing bowl 45, and is mixed with the sugar and cream supplied from the powder raw material canister 44 in the mixing bowl 45 to become a coffee drink, and the cup placed on the bend stage 47. C is poured into the nozzle C from the nozzle 46 and delivered to the user of the cup type vending machine 1.

  As described above, when the hot beverage is cooked, hot water stored in the hot water tank 20 is supplied from the hot water supply pipe 26 to a beverage cooking unit such as the coffee brewer 43 and the mixing bowl 45. When the amount of hot water stored in the hot water tank 20 decreases and falls to the lower limit water level, the low water level switch 29b outputs a lower limit water level signal to the control unit due to the lowering of the float 29 linked to the fluctuation of the water level. When the control unit receives the lower limit water level signal from the low water level switch 29 b, the control unit operates the water pump 13 to open the water supply valve 23 and supply drinking water to the hot water tank 20. When drinking water is supplied and rises to the upper limit water level, the high water level switch 29a outputs an upper limit water level signal due to the rise of the float 29 linked to the fluctuation of the water level, and the control unit stops the operation of the water pump 13 and turns the water supply valve 23 on. Close and stop water supply.

As described above, according to the hot water tank 20 in the first embodiment of the present invention, the hot water stored in the hot water tank 20 is supplied to the beverage cooking unit such as the coffee brewer 43 and the mixing bowl 45 and the lower limit water level. When the water pump 13 is operated and the water supply valve 23 is opened to supply drinking water, the hot water stored in the hot water rises to the upper limit water level. The draft surface of the hot water stored in 20 is in contact with only the outer peripheral surface of the hot water contact prevention cover 28 and repeats drying and wetting, so that the draft region K of the electric heater 22 is changed from the draft surface of the hot water. Since there is no direct contact, it is possible to provide the hot water tank 20 in which the frost adhesion of the electric heater 22 is prevented and the cleaning frequency is reduced.
(Embodiment 2)
Next, a hot water tank 30 according to Embodiment 2 of the present invention will be described with reference to FIG. The same reference numerals are used for the same configurations as those in the first embodiment. In the first embodiment, the water supply valve 23 is opened and the potable water supplied to the tank body 21 is heated by the electric heater 22, and the hot water stored between the upper limit water level and the lower limit water level is stored. In the hot water tank 20 that is opened and supplied, the draft area K that repeatedly submerges and exposes to hot water whose water level fluctuates at least between the upper and lower water levels in the electric heater 22 is prevented from coming into contact with the hot water. The hot water contact prevention cover 28 is attached to the top plate 21a of the tank body 21, and the joining portion 28a of the hot water contact prevention cover 28 to the electric heater 22 is fixed so as to be watertight. In the second hot water tank 30, at least the draft region K of the electric heater 22 is covered with the hot water contact prevention pipe 31 so that the junction 31 a with the electric heater 22 at the end is watertight. And by fixing. Even in the second embodiment, even if the water level fluctuation of the hot water stored in the hot water tank 30 is repeated, the draft surface of the hot water is only in contact with the outer peripheral surface of the hot water contact prevention pipe 31 and is dried. By repeating the wet state, the draft area K of the electric heater 22 is not in direct contact with the draft surface of the hot water, so that the hot water tank 30 that prevents the galvanic adhesion of the electric heater 22 and reduces the cleaning frequency is provided. It becomes possible to provide.

DESCRIPTION OF SYMBOLS 1 Cup type vending machine 12 Water reservoir 20 Hot water tank 21 Tank body 21a Top plate 22 Electric heater 23 Water supply valve 24 Water supply pipe 25 Hot water supply valve 26 Hot water supply pipe 27 Temperature sensor 28 Hot water contact prevention cover 29 Float 30 Hot water tank 31 Hot water contact prevention Pipe 43 Coffee brewer 45 Mixing bowl 50 Hot water tank K Draft area

Claims (3)

In the hot water tank that opens the water supply valve and heats the drinking water supplied to the tank body with an electric heater and keeps the hot water stored between the upper limit water level and the lower limit water level by opening the hot water supply valve,
A hot water contact prevention cover is provided that prevents a drafting area that repeats submergence and exposure from hot water whose water level fluctuates between at least the upper limit water level and the lower limit water level of the electric heater from contacting the hot water. A hot water tank characterized by that.   The hot water tank according to claim 1, wherein the hot water contact prevention cover is attached to a top plate of the tank body.   The hot water tank according to claim 1, wherein the hot water contact prevention cover is a hot water contact prevention pipe that covers the periphery of the electric heater.

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