KR20110130645A - Device drinking water for protecting heater - Google Patents

Abstract

PURPOSE: The operation of heater is controlled according to the water level of the water tank. The damage of heater is prevented. CONSTITUTION: A drinking water device comprises a water tank(20), a heater fitted part, heater, an intake part(30), and a controller. In the heater fitted part is the floor of the water tank, the accommodation space communicated with the inside of the water tank is had while being projected to downward. It installs to the accommodation space and heater heats the water saved in the water tank. The intake part flows in the water to the accommodation space of the heater fitted part. According to the controller is the water level of the accommodation space, the current provided to heater is controlled. It prevents from current being applied in heater before the water level of the accommodation space arrives in to the fixed state.

Description

Heated drinking water heater with protection function {Device drinking water for protecting heater}

The present invention relates to a heated drinking machine having a heater protection function, and more particularly, by operating the heater to boil and sterilize the water stored in the reservoir to control the operation of the heater to be associated with the water level so that the heater is not submerged in water. The present invention relates to a heated drinking machine having a heater protection function capable of preventing the heater from being operated in a state.

In general, drinking water refers to a device capable of providing drinking water by treating raw water such as tap water or groundwater. As a representative of the drinking water machine, a water purifier is mentioned.

The use of water purifiers is gradually spreading due to the increase of distrust in tap water due to environmental pollution. Recently, the water purifier is widely used to supply purified water by passing tap water through various filters such as sediment filter, sun carbon filter, membrane filter, fu carbon filter, ultraviolet filter.

Such water purifiers are installed and used not only in places where users are restricted to certain people such as homes or offices, but also in places where many people can use such as school cafeterias, school corridors, libraries, highway rest areas, train waiting rooms, government offices, and other public buildings. .

The water purified by the filter may be supplied as it is, but it is stored in a cold water tank and cooled by a cooling device (a gas refrigerant circulation cycle consisting of a compressor, a condenser, and an evaporator, or a thermoelectric element is mainly used), or stored in a hot water tank, such as an electric coil. Heated by a heating device. And the cold water and hot water stored in the cold water tank and hot water tank is discharged to the outside through the intake tap.

According to such a conventional water purifier, even if it is filtered by a filter, even microorganisms are not completely filtered out, which is a problem. In the case of hot water, there is no risk of germ propagation because the water is heated and maintained by more than 90 degrees by the heating device.

Therefore, there is known a structure of a water purifier for introducing water into a cold water tank after sterilization by heating water in a separate container before entering the cold water tank. These water purifiers mainly use large-capacity wet heaters to heat water in a short time. When wet heaters are powered up without water, the heaters are damaged due to high heat generation and the hassle and cost of replacement. The addition of is a problem.

The present invention was created to improve the above problems, it is possible to control the operation of the heater in accordance with the water level of the reservoir to prevent damage to the heater by not applying power to the heater when the heater is not submerged in water. The purpose is to provide a heated drinking water.

Heated drinking machine of the present invention for achieving the above object and the reservoir; A heater mounting part which protrudes downward from the bottom of the reservoir and has a receiving space communicating with the inside of the reservoir; A heater mounted in the accommodation space to heat the water stored in the reservoir; An inlet for introducing water into the receiving space of the heater mounting part; and supplied to the heater according to the level of the receiving space in order to prevent a current from being applied to the heater before the level of the receiving space reaches a set state. And a control unit for controlling the current.

The inlet part forms two branch flow paths from the raw water supply line and the raw water supply line and is connected to the heater receiving part, and selectively passes water through any one of the branch flow paths under the control of the controller. It characterized in that it comprises a first and second connecting pipe to.

The control unit includes a magnetic switch having a first contact portion connected to the internal electromagnet coil when the current is interrupted, a second switch connected to the electromagnet coil when the current is applied, and connected to the heater, and the heater mounting unit. A first switching part installed at the first contact part and connected to the first contact part and applying or blocking a current flowing to the first contact part by the water level of the accommodation space, and installed at the heater mounting part and connected to the second contact part; A second switching part for applying or blocking a current flowing to the second contact part by the water level of the accommodation space, and installed in the first connection pipe to be connected to the first contact part, And a second valve installed at the second connecting pipe and connected to the second and third contact portions, the second valve being connected to the heater in parallel. And a gong.

The first switching unit is installed on the upper side of the support tube provided in the heater mounting portion and flows up and down along the support tube by the change in the water level of the receiving space and is embedded in the support tube and the magnetic body is built-in A pair of leads connected and shorted according to the flow of the first float, one lead connected to a power source and the other lead having a first switch connected to a first contact portion,

The second switching unit is installed in the support tube to be disposed below the first float, the second float up and down along the support tube by the water level change of the receiving space and the magnetic float is built-in, the first switch A pair of leads disposed at a lower portion of the support tube at a position corresponding to an upper end of the heater and connected and shorted according to the flow of the second float, wherein one lead is connected to a power source and the other The lead has a second switch connected to the second contact portion.

A compressor for accommodating the reservoir and cooling the water heated in the reservoir to cool the water, an evaporator installed inside the reservoir, and a compressor for absorbing the latent heat of evaporation from the evaporator to compress the evaporated heat exchange medium. And a cooling unit including a condenser for condensing the heat exchange medium in the gaseous phase compressed by the compressor, and an expansion valve installed between the condenser and the evaporator to expand the heat exchange medium condensed by the condenser; And a forced circulation unit including a circulation pipe connected to an inlet and an outlet formed at the bottom of the reservoir, and a circulation pump installed in the circulation pipe to forcibly circulate the water stored in the reservoir. A third switching unit which is installed inside of and is connected to the second and third contact units, and connected in series with the second valve, and cuts off the current applied to the second valve when the water level of the reservoir reaches a set level. And a fourth installed in the reservoir to be connected to the second and third contact portions, and connected in series with the electromagnet coil to block a current applied to the electromagnet coil when the water temperature of the reservoir reaches a set water temperature. It further comprises a switching unit.

1 is a perspective view showing a drinking machine according to an embodiment of the present invention,
2 is a configuration diagram schematically showing the configuration of the drinking machine of FIG.
3 is a partially cutaway perspective view illustrating the inside of the reservoir applied to the drinking machine of FIG. 1;
5 and 6 are cross-sectional views of main parts for showing the operation of FIG.
FIG. 7 is a schematic circuit diagram illustrating a configuration of a controller applied to FIG. 1.
8 is a partially cutaway perspective view illustrating the inside of a reservoir applied to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a heated drinking machine according to a preferred embodiment of the present invention.

1 to 4, 7, the drinking machine 10 according to an embodiment of the present invention is a large-capacity drinking machine for the group water supply, supplying drinking water that can be safely sterilized. In addition, although not shown, the drinking machine 10 of the present invention may be implemented as a small drinking machine for home use.

In the drinking machine 10 according to an embodiment of the present invention, the housing 15 forms an appearance, and various components are installed in the housing 15.

The cylindrical housing 15 uses a metal material with strong corrosion resistance, such as stainless steel. The illustrated shape of the housing 15 is just an example, and various changes are possible, of course. A water intake faucet 91 protrudes from a front surface of the housing 15. In this case, a plurality of intake faucets 91 are installed so that many people can use at the same time.

And below the intake faucet 91 protrudes from the front surface of the housing 15 is formed with a drain 93. The drain 93 has a drain hole that naturally collects the water discharged from the intake faucet 91 and flows to the lower portion of the housing 15. The front surface of the drain 93 is provided with a button 95 for operating the valve 99 for opening and closing the flow path of the water intake faucet 91. A cup holder (not shown) for storing a cup may be formed at an upper portion of the housing 15, and a plurality of cup collecting portions (not shown) may be used at a lower portion of the drain 13 of the housing 15 to collect the used cups. Can be formed.

The inlet part 30 for supplying water to the water storage tank 20 installed inside the housing 10 includes a first water supply line 31 and first and second branches which form two branch flow paths from the raw water supply line 31. Two connection pipes 33 and 35 are provided.

The raw water supply line 31 drawn in from the outside of the housing 15 and extending therein is connected to the water supply pipe. Raw water supplied through the raw water supply line 31 is introduced into the reservoir 20 through the first or second connecting pipes 33 and 35. The first and second connecting pipes 33 and 35 branch off from the raw water supply line 31. Therefore, branch flow paths connected to flow paths of the raw water supply line 31 are formed in the first and second connection pipes 33 and 35, respectively. First and second valves 34 and 35 are respectively provided with first and second valves 34 and 37. The first and second valves 34 and 37 selectively pass water through any one branch flow path under the control of a controller to be described later.

In the example shown, the first and second connecting pipes 33 and 35 are combined into one inlet pipe 39. Unlike this, the first and second connecting pipes 33 and 35 may be connected to the heater mounting part 40 formed at the bottom of the reservoir while the inflow pipe 39 is omitted.

In addition, in the illustrated example, although the filter unit for filtering the foreign matter in the raw water is omitted, the filter unit may be added according to the type of raw water. In this case, the filter unit is installed on the raw water supply line (31). For example, the filter unit may prefilter to filter contaminants, pre-carbon filter, membrane filter and after carbon filter to remove chlorine, organic chemicals and other bacteria. -carbon filter) and the like.

The reservoir 20 is formed in a tubular shape in which a certain amount of water can be stored therein. The reservoir 20 is installed on the inner upper side of the housing 15. The bottom of the reservoir 20 is formed with a heater mounting portion 40 of the rectangular cylindrical shape formed to protrude downward. The upper portion of the heater mounting portion 40 is a structure that is open toward the interior of the reservoir 20. Therefore, the accommodation space 41 formed in the heater mounting portion 40 is in communication with the interior of the reservoir 20. The inlet port 49a and the drain port 49b are formed at the bottom of the heater mounting unit 40. The inlet port 49a is connected to the inlet pipe 39, and the drain port 49b is connected to the drain pipe 45. The valve 47 is provided in the drain pipe 45.

The heater 43 for heating the water stored in the reservoir 20 is installed in the accommodation space 20 of the heater mounting portion. The heater 43 is installed to be supported under the wall surface of the heater mounting part 40. As the heater 43, it is preferable to use a wet heater having the advantage of heating a large amount of water in a short time. Heater 43 is a power is applied to sterilize the water by heating to boil the water stored in the reservoir 20 to about 95 to 100 ℃.

The water heated in the reservoir 20 is cooled to 4 to 5 ° C., which is a temperature suitable for drinking by the cooling unit. Of course, the drinking water temperature of 4 to 5 ℃ can be implemented in a structure that can be adjusted by the user using a temperature controller as needed.

The cooling unit applied to the present invention uses a method of cooling the water heated to 95 to 100 ° C. with heat from the cooling water circulation tank 50 to cool the water to 35 to 40 ° C., and then cooling it to 4 to 5 ° C. using the latent heat of evaporation of the refrigerant. . By this cooling method, water can be cooled in a short time while saving electricity.

The cooling water circulation tank 50 is a structure having a space in which a predetermined amount of cooling water is circulated around the storage tank 20, and cooling water at room temperature is introduced through the cooling water supply pipe 51 to heat the water heated in the storage tank 20 at a predetermined temperature. Cool down to. The cooling water introduced into the cooling water circulation tank 50 may have a circulation flow continuously discharged through the cooling water discharge pipe 55 or may be stored for a predetermined time and then discharged through the cooling water discharge pipe 55. The cooling water supply pipe 51 and the cooling water discharge pipe 55 are provided with valves 53 and 57 for opening and closing the flow path, respectively. The valves 53 and 57 may be controlled to be opened and closed by the control of a conventional controller. That is, when the water in the reservoir 20 reaches 100 ° C, the controller outputs a signal from a conventional electronic water temperature sensor installed in the reservoir 20 so that the controller is provided with each valve 53 of the cooling water supply pipe 51 and the cooling water discharge pipe 55. Open 57) to allow the coolant to flow into the coolant circulation tank 50. When the water in the reservoir 920 is cooled to 35 to 40 ° C., the controller operates the respective valves 53 and 57 installed in the coolant supply pipe 51 and the coolant discharge pipe 55 by signals output from the electronic water temperature sensor. The flow path of the supply pipe 51 and the cooling water discharge pipe 55 is closed. As such, although the water heated in the reservoir 20 by the cooling water circulation tank 50 varies depending on the temperature of the cooling water flowing therein, the cooling water circulation tank 50 may cool down to about 35 to 40 ° C. in a short time.

In addition, an evaporator 60 is installed inside the reservoir to cool the water cooled to 35 to 40 ° C. to 4 to 5 ° C., and a compressor 61 absorbs latent heat of evaporation from the evaporator 60 and compresses the evaporated heat exchange medium. ), A condenser 63 for condensing the heat exchange medium in the gaseous phase compressed by the compressor 61, and a heat exchange medium condensed by the condenser 63 between the condenser 63 and the evaporator 60. An expansion valve 65 for expanding is provided. The controller controls the operation of the compressor 61 by the above-described electronic water temperature sensor. Water cooled to the drinkable temperature is supplied to the user through the intake faucet 91.

Although the cooling unit for cooling the water heated in the reservoir is provided in the above-described embodiment, the cooling unit may be omitted as necessary. That is, the water heated in the reservoir 20 may be naturally cooled at room temperature and supplied to the user. In addition, the configuration of the cooling unit may be made of only the cooling water circulation tank 50, the cooling water inlet pipe 51 and the discharge pipe 55, the valves 53, 57. In addition, although not shown, the drinking machine of the present invention may be provided with a conventional hot water supply unit for supplying hot water to the user.

The controller, which is the biggest feature of the present invention, prevents the current from being applied to the heater 43 before the water level of the receiving space 41 of the heater mounting portion reaches the set state. The controller controls the flow of current supplied to the heater 43 according to the water level of the accommodation space 41. This is to prevent damage to the heater 43 by preventing current from being applied to the heater 43 when the heater 43 is not submerged in water.

In particular, the conventional drinking machine used in school is to empty all the water in the reservoir when not using for a long time, such as vacation or to clean the inside of the reservoir. At this time, open the valve of the drain pipe to discharge all the water to the outside of the reservoir. In addition, if the manager operates the power button of the drinking machine for re-starting, power is supplied to the heater when the water tank is completely empty, which may cause a fire due to breakage of the heater and overheating.

This problem is solved through the configuration of the control unit. As shown in FIG. 7, the control unit applied to the present invention includes a first contact unit 71 connected when the current is interrupted to the internal electromagnet coil 75, and a first unit connected when the current is applied to the electromagnet coil 75. The magnetic switch 70 having the two contact portion 72 and the third contact portion 73 and the heater mounting portion 40 are installed in the two contact portion 72 and the third contact point due to the water level of the accommodation space 41. The first and second switching unit 80, 90 for applying or blocking the current flowing to the unit 73, and the first and second valves 34, 37 provided in the first and second connecting pipes. .

The operation principle of the magnetic switch 70 blocks the flow of electricity by switching the connection between the internal contacts while the electromagnet is excited or demagnetized as the current is applied or cut off to the built-in electromagnet coil 75. The magnetic switch 70 has a main contact and a contact which are normally connected when a current is applied to the electromagnet coil 75 (that is, in an on operation of the magnetic switch), and the current is blocked in the electromagnet coil 75. There is a contact b connected at the time (i.e., when the magnetic switch is turned off).

The contacts 71a and 71b of the first contact portion applied to the present invention mean a contact b which is normally connected and shorted when a current is applied to the electromagnet coil 75, and contacts 72a and 72b of the second contact portion. And the contacts 73a and 73b of the third contact portion mean a main contact that is normally short-circuited and connected when a current is applied to the electromagnet coil 75. The second and third contact portions 72 and 73 are connected to the input line and the output line of a commercial AC power source such as AC 220V and connected or shorted, respectively, according to the on / off operation of the magnetic switch. In the illustrated example, the normal contact a is omitted, but the contact a is connected to a power supply indicator lamp or a magnetic holding circuit during the on operation of the magnetic switch 70. The electromagnetic coil 75 of the magnetic switch is connected to a power input line. The electromagnet coil 75 is connected in parallel with the second and third contact portions 72 and 73 to form a closed circuit.

The first and second switching parts 80 and 90 are mounted to the support tube 100 installed in the heater mounting part 40 so that current can be applied or blocked according to the level of the receiving space 41 of the heater mounting part.

The first switching unit 80 is installed in the support tube 100 and flows up and down along the support tube 100 by the change in the water level of the receiving space, the first float 85, the magnetic body 86 is built-in, It includes a pair of leads 83 connected and shorted according to the flow of one float 85, one lead 83 is connected to the power source 1 and the other lead 83 is the first contact portion A first switch 81 connected with the 71 is provided.

In addition, the second switching unit 90 is installed in the support tube 100 so as to be disposed under the first float 85 and flows up and down along the support tube 100 by the change in the water level of the receiving space. ) And a pair of leads embedded in the support pipe 100 to be disposed below the first switch 81 and connected and shorted according to the flow of the second float 95. 93 and any one lead 93 is connected to a power source 1 and the other lead 93 has a second switch 91 connected to a second contact portion 72.

The support tube 100 is formed across the receiving space 41 vertically through the bottom of the heater mounting portion 40 from the outside of the heater mounting portion 40. The support tube 100 is formed of a hollow tube inside. The upper end of the support tube 100 may be formed to be the same or slightly higher than the bottom height of the reservoir (20). The support tube 100 is preferably installed by a fastening unit to move up and down with respect to the bottom of the heater receiving portion 40. When raising or lowering the support tube 100 to a predetermined height, the heights of the first and second switching units 80 and 90 may be changed to change a reference level for blocking or applying a current.

Fastening unit according to an embodiment is mounted so as to penetrate through the mounting hole 48 formed on the bottom of the heater mounting portion 40 and the support tube 100 vertically penetrates the nipple 105 and the lower portion of the nipple 105 A nut 109 which is screwed to fix the nipple 105 to the bottom of the heater accommodating part 40, and a sealing member 107 installed between the bottom of the heater accommodating part 40 and the nut 109 to maintain watertightness. And a tightening nut 101 which is screwed to an upper portion of the nipple 105 to fix the support tube at a predetermined position, and an O-ring 103 installed between the tightening nut 101 and the nipple 105 to maintain watertightness. Equipped. Therefore, by loosening the tightening nut 101 and moving the support tube 100 up and down, it is possible to adjust the height of the support tube 100, nipple 105 to tighten the tightening nut 101 to fix the support tube 100 after the adjustment. When the fastening nut 105 is fastened to the o-ring 103, the o-ring 103 is pressed against the outer circumferential surface of the support tube 100 to prevent the support tube 100 from moving. At the same time, watertightly acts to prevent water from leaking to the outside.

First to second and third and third stoppers 110, 113, and 115 are provided to limit the vertical flow range of the first and second floats 85 and 95. First and second floats 85 and 95 are mounted to the support pipe 100 between each stopper, respectively. The first float 85 is within the separation distance of the first and second stoppers 110 and 113, and the second float 95 is within the separation distance of the second and third stoppers 113 and 115. Limited. Each stopper may use a snap ring mounted in the mounting groove 117 formed in the support pipe 100.

The positions of the second and third stoppers 113 and 115 are determined so that the flow range of the second float 95 may be limited within a predetermined distance up and down based on the same height as the top of the heater 43. The first stopper 110 is determined at a position spaced apart from the second stopper 113 by a predetermined distance. The spacing of each stopper is preferably formed to be 2 to 4 times the length of each float thickness.

Since the first and second floats 85 and 95 are lighter than the specific gravity of water, they float on the water surface. The first float 85 has a circular through hole 89 in the center thereof. The through hole 89 has a larger outer alarm of the support tube 100. The second float 95 is also formed with a through hole. The first and second floats 85 and 95 installed so that the support tube 100 penetrates the through hole are moved up and down along the support tube 100 according to the level of the accommodation space. Of course, the vertical movement range at this time is limited by each stopper.

The first switch 81 is embedded in the support tube 100 between the first and second stoppers 110 and 113. In the present invention, the first switch 81 is installed at a position corresponding to the position where the first float 85 descends to the maximum, that is, the position where the first float 85 is caught by the second stopper 113. The first switch 81 is made of magnetic material, and a pair of leads 83 connected to the wires 84 are installed in the glass tube 82 filled with the inert gas. As the first float 85 floating on the water moves up and down between the first and second stoppers 110 and 113 along the water level, the first float 85 is positioned at a position corresponding to the first switch 81. When positioned, the magnetic force lines generated from the magnetic body 86 embedded in the first float 85 pass through the inside of the lead 83 more to connect two leads 83 separated from each other. When the first float 85 is out of the position corresponding to the first switch 81, the two leads 83 are shorted. One lead 83 of the first switch 81 is connected to a power source, and the other lead 83 is connected to a contact 71a of the first contact portion 71. In the present invention, the first switch 81 is connected at the position where the first float 85 is lowered to the maximum, and shorts when the first float 85 moves upward.

The second switch 91 is embedded in the support tube 100 between the second and third stoppers 113 and 115. In the present invention, the second switch 91 is installed at the same position as or higher than the upper end of the heater 43. That is, the height at which the second switch 91 is installed is set to be equal to or slightly higher than the water level at which the heater can be completely submerged in water. The second switch 91 is installed in a region where the second float 95 descends to the maximum, that is, the area where the second float 95 hangs upward from the position where the second float 95 is caught by the third stopper 115.

The second switch 91 is made of magnetic material, and a pair of leads 93 connected to the wire 94 are installed in the glass tube 92 filled with the inert gas, which is the same as that of the first switch 81. Do. When the second float 95 flows between the second and third stoppers 113 and 115 along the water level, and the second float 95 is positioned at a position corresponding to the second switch 91, the second switch 91 is connected. One lead 93 of the second switch 91 is connected to the power source 1, and the other lead 93 is connected to the contact 72a of the second contact portion 72. In the present invention, the second switch 91 is short-circuited at the position where the second float 95 descends to the maximum, and is connected when the water level rises and the second float moves upward.

On the other hand, the inside of the reservoir 20 is further provided with a third switching unit 120 which is short-circuited to block the current applied to the second valve 37 when the water level of the reservoir 20 reaches the set level.

The third switching unit 120 is mounted to the support tube 130 installed in the reservoir 20. The support tube 120 is installed vertically through the bottom of the reservoir 20 from the outside of the reservoir 20. The support tube 130 is formed of a hollow tube inside. The top of the support tube 130 is formed slightly lower than the top height of the reservoir (20). The support tube 130 is preferably installed by the fastening unit 140 to be movable up and down with respect to the reservoir 20 to adjust the height. Fastening unit 140 is the same as the configuration of the fastening unit for supporting the support tube 100 installed in the heater mounting portion.

The third switching unit 120 is installed in the support pipe 130 and flows up and down along the support pipe 130 by the water level change of the reservoir 20, the third float 125 and the magnetic material is built-in, the support pipe And a third switch 121 embedded in the 130 and including a pair of leads connected and shorted according to the flow of the third float 125. Since the configuration of the third switch 121 is the same as that of the first switch 81, a detailed description thereof will be omitted. One lead of the third switch 121 is connected to an output line connected to the second contact portion 72, and the other lead is connected to an output line connected to the third contact portion 73. The third switch 121 is connected in series with the second valve 37.

The third switch 121 is limited in the upper and lower flow range by the fourth and fifth stoppers (131, 135) installed in the support tube 130. In the present invention, the third switch 121 is installed at the same position as the maximum water level that can be stored in the reservoir 20. Therefore, the third switch 121 is installed at the position where the third float 125 descends to the maximum, that is, the position where the third float 125 is caught by the fifth stopper 135. When the water level of the reservoir 20 does not reach the maximum level, the third float 125 is in a state that is hung on the fifth stopper 135, that is, in a position of maximum descending. Since this position is the same position as the third switch 121, the third switch 121 is kept connected. When the level rises above the maximum level, the third float 125 hanging on the fifth stopper 135 rises, thus leaving the position of the third switch 121, so that the third switch 121 is short-circuited. do.

When the water temperature of the reservoir 20 reaches the set water temperature, the fourth switching unit 140 for blocking the current applied to the electromagnet coil 75 is installed in the reservoir 20. The fourth switching unit 140 is a bimetallic water temperature sensor is applied. The contact of the fourth switching unit 140 is short-circuited when the water temperature of the reservoir 20 reaches about 95 to 100 ° C, and remains connected at a temperature below that. The fourth switching unit 140 is connected to a power input line connected to the second and third contact units 72 and 73 but connected in series with the electromagnet coil 75.

Hereinafter, the operation of the heated drinking machine, which is a feature of the present invention, will be briefly described. First, when not used for a long time or to clean the inside of the reservoir 20, the valve 47 of the drain pipe 45 is opened to drain all the water mounted in the reservoir 20 and the heater mounting portion 40. In this case, the positions of the first and second floats 85 and 95 installed in the support tube 100 of the heater mounting unit 40 are as shown in FIG. 5. Since the accommodation space 41 is empty, the first float 85 and the second float 95 are placed in the maximum descending position. Accordingly, the first float 85 is stopped at the same position as the first switch 81, and the second float 95 is stopped at a position away from the second switch 91.

In this state, the power button 5 provided in the housing 15 is pressed to use the drinking machine of the present invention. At this time, since the second switch 91 is in a short circuit state, no current is applied to the electromagnet coil 75 of the magnetic switch. Accordingly, the first contact portion 71 is in a connected state, and the second and third contact portions 72 and 73 are in a short circuit state.

Since the first switch 81 is in a connected state, current is supplied to the first valve 34 through the first contact portion 71. Therefore, the first valve 34 opens the flow path of the first connecting pipe 33. When the first valve 34 is opened, the raw water begins to flow into the receiving space 41 of the heater mounting part through the raw water supply line 31. When the water flowing into the accommodation space 41 is filled up to the position of the third stopper 115, the second float 95 starts to rise. As shown in FIG. 6, when the water level rises and the second float 95 reaches the same position as the second switch 91, the second switch 91 is connected. The water level at this time is the water level at which the heater 43 is submerged in water.

When the second switch 91 is connected, a current is applied to the electromagnet coil 75. Therefore, the electromagnet is excited, the first contact portion 71 is short-circuited, and the second and third contact portions 72 and 73 are connected. Therefore, the first valve 34 closes the flow path of the first connecting pipe 33. In addition, a current is applied to the heater 43 connected to the second and third contact portions 72 and 73. Then, power is supplied to the second valve 37 connected in parallel with the heater 43 so that the second valve 37 opens the flow path of the second connection pipe 35. Raw water supplied through the raw water supply line 31 continues to flow into the receiving space 41 of the heater mounting portion through the second connecting pipe 35.

As water continues to flow in, the heater mounting portion 40 is first filled with water, and then the water is filled in the reservoir 20. If water continues to rise in the reservoir 20 and the water level rises above the maximum level, the third float 125 rises, and accordingly, the third switch 121 is short-circuited. When the third switch 121 is short-circuited, the current applied to the second valve 37 is cut off so that the second valve 37 closes the flow path of the second connecting pipe 35. Therefore, the supply of water to the reservoir 20 is stopped. The water stored in the reservoir 20 is heated by the heater 43 and finally reaches 95 to 100 ° C. When the water temperature is 95 to 100 ° C., the contacts of the third switching unit 140 are short-circuited. As the fourth switching unit 140 is shorted, the current supplied to the electromagnet coil 75 of the magnetic switch is cut off, and the second and third contact portions 72 and 73 are shorted as the electromagnet is demagnetized. Therefore, the current supplied to the heater 43 is cut off and the operation of the heater 43 is stopped. At this time, the first contact portion 71 is changed to the connected state, but since the first switch 81 is kept shorted, the first valve 34 does not operate.

As described above, the present invention can protect the heater 43 by preventing a current from being applied to the heater 43 in a state in which the heater accommodating part 40 is not filled with water.

On the other hand, the drinking machine according to another embodiment of the present invention may further include a forced circulation unit as shown in FIG.

Referring to FIG. 7, the forced circulation unit is configured to force circulation of water stored in the reservoir 20 and the circulation pipe 150 connected at both ends to the inlet 21 and the outlet 23 formed at the bottom of the reservoir 20. It is provided with a circulation pump 155 installed in the circulation pipe (150). Preferably, the inlet 21 to which one end of the circulation pipe 150 is connected is formed at the bottom of the reservoir 20 adjacent to the evaporator 60, and the outlet is formed at the bottom of the reservoir 20 opposite to the evaporator 60. .

The circulation pump 155 sucks the water cooled around the evaporator 60 through the inlet 21 and discharges it into the reservoir 20 through the outlet 23. Therefore, the upper and lower layers of the stored water of the reservoir 20 is forcedly circulated.

As described above, the drinking machine 10 of the present invention is an evaporator 60 installed by the evaporator 60 inside the reservoir 20 to directly cool the water in the water and by forced circulation of the water by the circulation pump 155, the evaporator 60. The large amount of water can be cooled rapidly while only the surrounding water is cooled or the water around the evaporator is frozen.

On the other hand, the components not described in this embodiment are the same as the embodiment of FIG.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments thereof are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

10: drinkware 15: housing
20: reservoir 30: inlet
33: first connector 34: first valve
35: second connector 37: second valve
40: heater mounting portion 43: heater
50: cooling water circulation tank 60: evaporator
70: magnetic switch 75: electromagnet coil
80: first switching unit 81: first switch
90: second switching unit 91: second switch

Claims (5)

A reservoir;
A heater mounting part which protrudes downward from the bottom of the reservoir and has a receiving space communicating with the inside of the reservoir;
A heater mounted in the accommodation space to heat the water stored in the reservoir;
An inlet for introducing water into the receiving space of the heater mounting unit;
And a control unit for controlling a current supplied to the heater according to the level of the accommodation space to prevent the current from being applied to the heater before reaching the set state of the accommodation space. Handwriting. According to claim 1, wherein the inlet is formed of two branch flow paths from the raw water supply line, and the raw water supply line is connected to the heater accommodating portion and the branch flow path of any one of the branch flow paths under the control of the controller Heated drinking water, characterized in that it comprises a first and second connecting tube for selectively passing water through. The magnetic control device of claim 2, wherein the controller has a first contact portion connected to the internal electromagnet coil when the current is cut off, and a second and third contact portion connected to the electromagnet coil and connected to the heater. A switch, a first switching unit installed in the heater mounting unit and connected to the first contact unit and applying or blocking a current flowing to the first contact unit by the water level of the accommodation space; A second switching part connected to a second contact part and applying or blocking a current flowing to the second contact part by the water level of the accommodation space, and installed in the first connection pipe and connected to the first contact part and connected to the first contact part; A first valve for opening or blocking a branch flow path of a connection pipe, and a second valve installed in the second connection pipe and connected to the second and third contact parts, and connected in parallel with the heater. Heated handwritten notes, characterized in that it comprises. According to claim 3, The first switching unit is installed on the upper side of the support tube provided in the heater mounting portion and the first float flows up and down along the support tube by the change in the water level of the receiving space and the magnetic body is built-in, A pair of leads embedded in the support tube and connected and shorted according to the flow of the first float, wherein one lead is connected to a power source and the other lead has a first switch connected to a first contact portion and,
The second switching unit is installed in the support tube to be disposed below the first float, the second float up and down along the support tube by the water level change of the receiving space and the magnetic float is built-in, the first switch A pair of leads disposed at a lower portion of the support tube at a position corresponding to an upper end of the heater and connected and shorted according to the flow of the second float, wherein one lead is connected to a power source and the other The lid of the heated drinking water, characterized in that it has a second switch connected to the second contact portion. The cooling water circulation tank of claim 3, wherein the storage tank is accommodated therein and a cooling water is circulated to cool the water heated in the storage tank, an evaporator installed inside the storage tank, and the evaporator absorbs the latent heat of evaporation from the evaporator. A compressor for compressing the heat exchange medium, a condenser for condensing the heat exchange medium in the vapor phase compressed by the compressor, and an expansion valve installed between the condenser and the evaporator to expand the heat exchange medium condensed by the condenser. A cooling unit;
And a forced circulation unit including a circulation pipe connected to an inlet and an outlet formed at the bottom of the reservoir, and a circulation pump installed in the circulation pipe to force circulation of the water stored in the reservoir.
The control unit is installed inside the reservoir and is connected to the second and third contact portions, and is connected in series with the second valve, and blocks the current applied to the second valve when the water level of the reservoir reaches a set level. The third switching unit and the inside of the reservoir is connected to the second and third contact portion, but connected in series with the electromagnet coil and the current applied to the electromagnet coil when the water temperature of the reservoir reaches the set water temperature Heated drinking machine further comprises a fourth switching unit for blocking the.

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