Drinking water dispenser

Abstract

To provide a drinking water dispenser capable of preventing hot water from being discharged from an expansion pipe of a hot water tank when an electric pump is driven.SOLUTION: A drinking water dispenser 1 comprises: a drinking water container into which drinking water is poured; a connecting part for attaching and detaching the drinking water container; a cold water tank for cooling and storing drinking water; a hot water tank for heating and storing drinking water; a water supply pipe connected to the connecting part and supplying drinking water to the cold water tank and the hot water tank, a cold water discharge pipe connected to a lower part of the cold water tank and supplying cold water to a cold water discharge valve; a hot water discharge pipe connected to the hot water tank and supplying hot water to a hot water discharge valve; a water purification filter arranged in the water supply pipe and purifying drinking water; a first pump arranged in the water supply pipe and supplying drinking water that has passed through the water purification filter to the cold water tank and the hot water tank; an expansion pipe connected to an upper part of the hot water tank and capable of draining hot water, and a water stop part arranged in the expansion pipe and stopping the supply of hot water.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a drinking water dispenser. [Background technology]

[0002] A drinking water dispenser is a drinking water supply device also known as a water server or drinking water dispenser. The drinking water dispenser includes a hot water tank for storing hot water and a cold water tank for storing cold water. Drinking water is supplied from a drinking water container to these tanks, and the drinking water is heated or cooled in each tank. Each tank is connected to an outlet pipe, and the drinking water (hot water, cold water) stored in each tank is extracted by operating a valve (outlet valve) installed at the end of the outlet pipe.

[0003] Drinking water dispensers are continuously used by replacing the drinking water containers that store drinking water. The user (owner) of the drinking water dispenser replaces the drinking water container when the drinking water inside the container is used up. The drinking water containers are single-use and disposable. On the other hand, there are also drinking water dispensers that use a drinking water container that can be reused by the user by adding tap water. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-102044 Summary of the Invention [Problem to be solved by the invention]

[0005] Some drinking water dispensers have a drinking water container mounted on top of the dispenser body and dispense drinking water by using the head difference. However, the task of placing a full drinking water container on top of the dispenser body is physically demanding for the user. To address this issue, a new type of dispenser has been developed in which the drinking water container is placed at the bottom of the dispenser body and an electric pump is used to supply drinking water to each tank placed at the top. In dispensers that use tap water, a high-pressure electric pump is used to pass the tap water through a water purification filter.

[0006] Airless type hot water tanks have an expansion pipe (vent pipe) attached to the top of the tank to adjust the pressure. However, when the hot water tank is located on top of the drinking water dispenser body, it is difficult to extend the expansion pipe to a high position. Therefore, when a high-pressure electric pump is driven to dispense drinking water, the internal pressure of the hot water tank increases, causing hot water to be discharged through the expansion pipe. Furthermore, once hot water is discharged through the expansion pipe, it continues to be discharged.

[0007] An object of the present invention is to provide a drinking water dispenser that can prevent hot water from being discharged from the expansion pipe of a hot water tank when an electric pump is driven. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the present invention employs the following means. a hot water tank for storing hot water obtained by heating the drinking water; a water supply pipe connected to the connecting part and supplying the drinking water to the cold water tank and the hot water tank, a cold water outlet pipe connected to the lower part of the cold water tank and supplying the cold water to a cold water outlet valve; a hot water outlet pipe connected to the hot water tank and supplying the hot water to a hot water outlet valve; a water purification filter disposed in the water supply pipe and purifying the drinking water; a first pump disposed in the water supply pipe and supplying the drinking water that has passed through the water purification filter to the cold water tank and the hot water tank; an expansion pipe connected to the upper part of the hot water tank and capable of discharging the hot water;

[0009] A second embodiment of the drinking water dispenser of the present invention is characterized in that, in the first embodiment, the water stop part is driven in conjunction with the first pump.

[0010] A third embodiment of the drinking water dispenser of the present invention is characterized in that, in the first or second embodiment, the water stop part is a second pump that pushes the hot water in the expansion pipe back into the hot water tank.

[0011] A fourth embodiment of the drinking water dispenser of the present invention is characterized in that, in any one of the first to third embodiments, the second pump is a non-positive displacement pump.

[0012] A fifth embodiment of the drinking water dispenser of the present invention is characterized in that, in any one of the first to fourth embodiments, the first pump is a positive displacement pump.

[0013] A sixth embodiment of the drinking water dispenser of the present invention is characterized in that, in any of the first to fifth embodiments, it is provided with a separator that divides the inside of the cold water tank into upper and lower sections, and a room temperature water outlet pipe that communicates with the upper part of the cold water tank and supplies room temperature water to a room temperature water outlet valve. [Effects of the Invention]

[0014] The drinking water dispenser of the present invention can prevent hot water from being discharged from the expansion pipe of the hot water tank when the electric pump is driven. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a perspective view showing a drinking water dispenser 1 according to an embodiment. [Figure 2] FIG. 2 is a perspective view showing a state in which the drawer section 7 is drawn out. [Figure 3] 10 is a perspective view showing a state in which the drinking water container 50 has been removed from the drawer section 7. FIG. [Figure 4]1 is a perspective view showing a drinking water container 50 with a drinking water inlet 53 open. [Figure 5] 1 is a schematic diagram showing the internal configuration of a drinking water dispenser 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] A drinking water dispenser 1 according to an embodiment of the present invention will be described with reference to the drawings. Note that the drawings are schematic diagrams, and the dimensions, proportions, and angles of tanks, piping, etc. may not be accurately depicted.

[0017] FIG. 1 is a perspective view showing a drinking water dispenser 1 according to an embodiment. FIG. 2 is a perspective view showing the state in which the drawer section 7 is drawn out. FIG. 3 is a perspective view showing a state in which the drinking water container 50 has been removed from the drawer section 7. As shown in FIG.

[0018] The drinking water dispenser 1 is a device that stores tap water and dispenses (supplies) it in response to a user's operation. The drinking water dispenser 1 is used by attaching a drinking water container 50 containing tap water. The drinking water dispenser 1 purifies the tap water stored in the drinking water container 50, adjusts the temperature, and then dispenses drinking water W from the water supply unit 3.

[0019] The drinking water container 50 is a resin container that stores tap water (drinking water W). The drinking water container 50 is detachable from the drinking water dispenser 1 and is housed inside the server housing 2. Tap water stored in the drinking water container 50 is sucked by the first pump 17, passes through the water purification filter 18, and is sent as drinking water W into the drinking water dispenser 1.

[0020] The drinking water dispenser 1 includes a cold water tank 11 and a hot water tank 13 inside a server housing 2. Drinking water W supplied from a drinking water container 50 is sent to the cold water tank 11 and the hot water tank 13. The cold water tank and the hot water tank are each covered with a heat insulating material and housed in the upper part of the interior of the server housing 2. Specifically, the cold water tank 11 and the hot water tank 13 are disposed on the rear side of the water supply unit 3. The cold water tank 11 stores drinking water W as room temperature water N, and further cools the drinking water W and stores it as cold water C. The hot water tank 13 heats the drinking water W and stores it as hot water H.

[0021] A water supply unit 3 that receives drinking water W (cold water C, hot water H, room temperature water N) is disposed on the front surface of the server housing 2. The water supply unit 3 is a space where a user receives drinking water W. A water outlet 4 for discharging drinking water W (cold water, hot water, room temperature water) is provided at the top of the water supply unit 3. Drinking water W sent from a cold water tank 11 or a hot water tank 13 is discharged from the water outlet 4. The water outlet 4 is connected to a room temperature water outlet pipe 21, a cold water outlet pipe 23, and a hot water outlet pipe 25, which will be described later. Instead of providing one water outlet 4, three water outlets (a normal temperature water outlet, a cold water outlet, and a hot water outlet) may be provided.

[0022] A water receiving tray 5 is provided below the water outlet 4 to receive drinking water W (wastewater) dripping from the water outlet 4. The water receiving tray 5 also receives wastewater from an expansion pipe 27, which will be described later. The water receiving tray 5 is detachable from the drinking water dispenser 1 (server housing 2) and is arranged at the bottom of the water supply unit 3. The water receiving tray 5 can store about 200 mL of wastewater. The water receiving tray 5 is removed from the drinking water dispenser 1 when the wastewater has accumulated, and is reattached to the drinking water dispenser 1 after the wastewater has been discarded.

[0023] An operation panel 6 is provided above the water supply unit 3 (on the front top surface of the server housing 2) to allow the user to perform various operations. This operation panel 6 is provided with a cold water dispense button, a hot water dispense button, a room temperature water dispense button, etc. By pressing a cold water discharge button or the like on the operation panel 6, drinking water W (cold water, hot water, or room temperature water) is discharged from the water outlet 4 of the water supply unit 3.

[0024] A drawer section 7 for accommodating a drinking water container 50 is provided on the front side of the center in the vertical direction of the server housing 2. The drawer section 7 is disposed below (directly below) the water supply section 3. The drinking water container 50 is detachably placed on the drawer section 7. The drawer section 7 is a tray body having a bottom plate section 8 on which the drinking water container 50 is placed. When a user grasps the upper end of the front plate of the drawer section 7, the drawer section 7 can be slid forward and backward.

[0025] A connecting part 9 having a water inlet is provided on the bottom plate part 8 of the drawer part 7. The connecting part 9 has a shape that allows the bottom of the drinking water container 50 to fit into it. When the drinking water container 50 is placed on the bottom plate portion 8, the water outlet 54 provided on the underside of the drinking water container 50 fits into the water inlet of the connecting portion 9. This allows the connecting portion 9 to receive drinking water W from the drinking water container 50. A water purification filter 18 is also detachably attached to the bottom plate 8 of the drawer section 7. The water purification filter 18 purifies the drinking water W received from the drinking water container 50. The drinking water W that has passed through the water purification filter 18 is sent to the cold water tank 11 or the like.

[0026] FIG. 4 is a perspective view showing the drinking water container 50 with the drinking water inlet 53 open. The drinking water container 50 is a rectangular box (cuboid) molded from, for example, polypropylene. The drinking water container 50 is formed in a pyramidal shape with an outer shape that gradually decreases toward the bottom. A drinking water inlet 53 is provided on the top surface of the drinking water container 50, and a water outlet 54 with a valve is provided on the bottom surface. The drinking water container 50 can hold approximately 4 to 6 L of tap water (drinking water W).

[0027] Of the side surfaces of the drinking water container 50, a pair of lateral side surfaces facing the left and right directions are each formed with a handle 55 for a user to grasp (hold) the drinking water container 50 with both hands. By placing both hands (four fingers excluding the thumb) on the handles 55, the user can stably grasp (hold) the drinking water container 50 and lift or lower it.

[0028] FIG. 5 is a schematic diagram showing the internal configuration of the drinking water dispenser 1. As shown in FIG. The drinking water dispenser 1 is a so-called airless type water server. The cold water tank 11 and the hot water tank 13 are filled with drinking water W, and the drinking water W is not exposed to air, so the drinking water W can be stored well. The drinking water dispenser 1 dispenses drinking water W using the first pump 17 without using a head difference. In other words, the drinking water container 50 is positioned lower than the cold water tank 11 and the hot water tank 13. The drinking water W stored in the drinking water container 50 is then sucked up by the first pump 17 and sent to the cold water tank 11 and the hot water tank 13. At the same time, the drinking water W stored in the cold water tank 11 or the hot water tank 13 is dispensed from the water supply unit 3 (water outlet 4).

[0029] The cold water tank 11 is a stainless steel container equipped with a cooler (not shown) for cooling the drinking water W stored inside. The cooler is disposed along the lower side of the side wall. The cooler may be of a compressor type, a Peltier type, or the like. The cooler is controlled by a controller (not shown).

[0030] A separator 12 is disposed on the upper side of the cold water tank 11 to divide the interior of the cold water tank 11 into upper and lower compartments. The separator 12 is a plate member that extends horizontally and inhibits convection of the drinking water W stored in the cold water tank 11 in the vertical direction. In other words, the separator 12 divides the interior into upper and lower sections, making it difficult for the drinking water W stored in the upper section to mix with the drinking water W stored in the lower section. This allows the cold water tank 11 to store room temperature water N in the upper section and cold water C in the lower section.

[0031] A water supply pipe 15a for supplying drinking water W to the cold water tank 11 is connected to the top of the cold water tank 11. The water supply pipe 15a is connected to the water supply pipe 15 that communicates with the connecting part 9. In other words, the water supply pipe 15a is a branch pipe of the water supply pipe 15. Drinking water W (room temperature water N) filled in a drinking water container 50 is poured into the cold water tank 11 from the connecting part 9 via the water supply pipe 15 and the water supply pipe 15a.

[0032] The hot water tank 13 is a sealed container made of stainless steel, and is equipped with a heater (not shown) that heats the drinking water W stored therein. The heater may be a sheath heater or a band heater. The heater is controlled by a controller (not shown). The heater may be located outside the hot water tank 13 .

[0033] A water supply pipe 15b for supplying drinking water W to the hot water tank 13 is connected to the bottom of the hot water tank 13. The water supply pipe 15b is connected to the water supply pipe 15 that communicates with the connecting part 9. In other words, the water supply pipe 15b is a branch pipe of the water supply pipe 15. Drinking water W (room temperature water N) filled in a drinking water container 50 is poured into the hot water tank 13 from the connecting part 9 via the water supply pipe 15 and the water supply pipe 15b.

[0034] A first pump (positive displacement pump) 17 is disposed in the water supply pipe 15. The first pump 17 is disposed downstream of the water purification filter 18 and downstream of the cold water tank 11, etc. The first pump 17 is disposed on the bottom plate 8 of the drawer section 7. The first pump 17 injects drinking water W into the cold water tank 11 and the hot water tank 13, and causes water to flow out from the water supply unit 3. The first pump 17 operates in accordance with the operation of the operation panel 6 (room temperature water flow button, cold water flow button, hot water flow button). The first pump 17 is a positive displacement pump, such as a diaphragm pump, because the first pump 17 requires a high suction force (water pressure) to suck up the drinking water W and pass it through the water purification filter 18.

[0035] A room temperature water outlet pipe 21 and a cold water outlet pipe 23 are connected to the cold water tank 11. The room temperature water outlet pipe 21 opens above the separator 12 and communicates with the water outlet 4 of the water supply unit 3. A room temperature water outlet valve 22 is disposed at the most downstream side of the room temperature water outlet pipe 21. By opening this room temperature water outlet valve 22, drinking water W (room temperature water N) stored in the upper part of the cold water tank 11 is discharged from the water outlet 4 via the room temperature water outlet pipe 21. The cold water outlet pipe 23 opens below the separator 12 and communicates with the water outlet 4 of the water supply unit 3. A cold water outlet valve 24 is disposed at the most downstream side of the cold water outlet pipe 23. By opening this cold water outlet valve 24, drinking water W (cold water C) stored in the lower part of the cold water tank 11 is discharged from the water outlet 4 via the cold water outlet pipe 23.

[0036] A hot water outlet pipe 25 is connected to the top of the hot water tank 13. The hot water outlet pipe 25 opens at the top of the hot water tank 13 and communicates with the water outlet 4 of the water supply unit 3. A hot water outlet valve 26 is disposed at the most downstream side of the hot water outlet pipe 25. By opening this hot water outlet valve 26, drinking water W (hot water H) stored in the hot water tank 13 is discharged from the water outlet 4 via the hot water outlet pipe 25.

[0037] The normal temperature water outlet valve 22, cold water outlet valve 24, and hot water outlet valve 26 are electromagnetic open / close control valves, and operate in accordance with the operation of the operation panel 6 (normal temperature water outlet button, cold water outlet button, hot water outlet button). The normal temperature water outlet valve 22, the cold water outlet valve 24, and the hot water outlet valve 26 may be manual on-off valves. In this case, the normal temperature water outlet button, the cold water outlet button, and the hot water outlet button are not necessary.

[0038] An expansion pipe 27 is also connected to the top of the hot water tank 13. The expansion pipe 27 is provided to adjust (suppress) the internal pressure of the hot water tank 13. The expansion pipe 27 is also called a relief pipe, and when the drinking water W (hot water H) stored in the hot water tank 13 expands due to heating, the increased volume flows into the expansion pipe 27 and is discharged to the outside. The expansion pipe 27 extends upward from the hot water tank 13. The tip of the expansion pipe 27 is bent downward to prevent the intrusion of dust and the like. A water receiving tray 5 is disposed below the tip of the expansion pipe 27 to receive the drainage water (hot water H) from the expansion pipe 27. That is, when the internal pressure of the hot water tank 13 increases, the hot water H flows into the expansion pipe 27 and is drained into the water receiving tray 5. This prevents the pressure in the hot water tank 13 from increasing due to the expansion of the hot water H.

[0039] A second pump (water stopper, non-positive displacement pump) 28 is disposed in the expansion pipe 27. The second pump 28 is a non-positive displacement pump, such as a centrifugal pump. When driven, the second pump 28 sucks air from the tip of the expansion pipe 27. This pushes the hot water H in the expansion pipe 27 back toward the hot water tank 13. In other words, the inflow of hot water H into the expansion pipe 27 is stopped (water is stopped). On the other hand, when the second pump 28 is at rest, it does not hinder the movement of the hot water H or air in the expansion pipe 27. That is, the hot water H flows freely in the expansion pipe 27.

[0040] The second pump 28 operates (drives) only when a water discharge button (room temperature water discharge button, cold water discharge button, hot water discharge button) is pressed on the operation panel 6. In other words, the second pump 28 drives in conjunction with the first pump 17.

[0041] Next, the operation of the drinking water dispenser 1 will be described. (Standby: non-water supply) When the drinking water dispenser 1 is in a standby state (not discharging water), the room temperature water outlet valve 22, the cold water outlet valve 24, and the hot water outlet valve 26 are closed. The first pump 17 and the second pump 28 are at rest, and the expansion pipe 27 is in an aerated state (a state in which hot water H can be discharged). When the heater of the hot water tank 13 is activated and heats the drinking water W stored inside, the drinking water W (hot water H) expands and the internal pressure of the hot water tank 13 begins to rise. Because the expansion pipe 27 is in an aerated state, the hot water H can be drained from the expansion pipe 27, and the rise in the internal pressure of the hot water tank 13 is suppressed.

[0042] (hot water) When the hot water outlet button on the operation panel 6 is pressed, the first pump 17 starts to operate. Drinking water W in the drinking water container 50 is sent to the hot water tank 13 via the water supply pipe 15. At the same time as the first pump 17 starts to operate, the hot water outlet valve 26 opens, and the hot water H stored in the hot water tank 13 flows into the hot water outlet pipe 25. As a result, the hot water H is discharged from the water outlet 4 of the water supply unit 3. When hot water is discharged, the normal temperature water discharge valve 22 and the cold water discharge valve 24 are closed. The second pump 28 is driven in conjunction with the first pump 17, and the expansion pipe 27 is sealed (a state in which hot water H cannot be discharged). Air is sucked in from the tip of the expansion pipe 27, and the hot water H in the expansion pipe 27 is pushed back into the hot water tank 13. When the hot water outlet button is no longer pressed, the first pump 17 and the second pump 28 stop, and the hot water outlet valve 26 closes.

[0043] (cold water) When the cold water discharge button on the operation panel 6 is pressed, the first pump 17 starts to operate. Drinking water W in the drinking water container 50 is sent to the cold water tank 11 via the water supply pipe 15. At the same time as the first pump 17 starts to operate, the cold water discharge valve 24 opens, and the cold water C stored in the cold water tank 11 flows into the cold water discharge pipe 23. As a result, the cold water C is discharged from the water outlet 4 of the water supply unit 3. When cold water is discharged, the normal temperature water discharge valve 22 and the hot water discharge valve 26 are closed. The second pump 28 is driven in conjunction with the first pump 17, and the expansion pipe 27 is sealed (a state in which hot water H cannot be discharged). Air is sucked in from the tip of the expansion pipe 27, and the hot water H in the expansion pipe 27 is pushed back into the hot water tank 13. When the hot water outlet button is no longer pressed, the first pump 17 and the second pump 28 stop, and the cold water outlet valve 24 closes.

[0044] (room temperature water flow) When the room temperature water discharge button on the operation panel 6 is pressed, the first pump 17 starts to operate. Drinking water W in the drinking water container 50 is sent to the cold water tank 11 via the water supply pipe 15. At the same time as the first pump 17 starts to operate, the room temperature water discharge valve 22 opens, and the room temperature water N stored in the cold water tank 11 flows into the room temperature water discharge pipe 21. As a result, the room temperature water N is discharged from the water outlet 4 of the water supply unit 3. When cold water is discharged, the cold water discharge valve 24 and the hot water discharge valve 26 are closed. The second pump 28 is driven in conjunction with the first pump 17, and the expansion pipe 27 is sealed (a state in which hot water H cannot be discharged). Air is sucked in from the tip of the expansion pipe 27, and the hot water H in the expansion pipe 27 is pushed back into the hot water tank 13. When the room temperature water discharge button is no longer pressed, the first pump 17 and the second pump 28 stop, and the room temperature water discharge valve 22 closes.

[0045] As described above, the drinking water dispenser 1 has the drinking water container 50 located at the bottom of the server housing 2 and uses the first pump 17 to supply drinking water W to the cold water tank 11 or the like located above. Because the drinking water dispenser 1 uses tap water as the drinking water W, a high-pressure positive displacement pump is used for the first pump 17 to pass the drinking water W through the water purification filter 18. An expansion pipe 27 for pressure adjustment is attached to the top of the airless hot water tank 13. Because the hot water tank 13 is located at the top of the server housing 2, it is difficult to extend the expansion pipe 27 to a high position. For this reason, when the first pump 17 is driven to dispense drinking water W, the internal pressure of the hot water tank 13 increases, which may cause hot water H to be discharged from the expansion pipe 27. Furthermore, once hot water H is discharged from the expansion pipe 27, the siphon effect may cause hot water H to continue to be discharged. However, since the drinking water dispenser 1 is provided with the second pump 28 in the expansion pipe 27, even if the first pump 17 is driven when the drinking water W is dispensed, it is possible to prevent the hot water H from being discharged from the expansion pipe 27 of the hot water tank 13. In particular, by driving the second pump 28, air is sucked in from the tip of the expansion pipe 27, and the hot water H in the expansion pipe 27 is pushed back into the hot water tank 13, thereby preventing the siphon effect.

[0046] The present invention is not limited to the above-described embodiments, and includes various modifications to the above-described embodiments without departing from the spirit of the present invention. In other words, the specific shapes and configurations given in the embodiments are merely examples, and can be modified as appropriate.

[0047] The timing at which the second pump 28 is stopped may be changed depending on the type of water discharge button that is pressed (room temperature water discharge button, cold water discharge button, hot water discharge button). For example, when the room temperature water discharge button or the cold water discharge button is pressed (when water is discharged from the cold water tank 11), the second pump 28 is stopped a few seconds after the first pump 17 stops. On the other hand, when the hot water discharge button is pressed (when water is discharged from the hot water tank 13), the first pump 17 and the second pump 28 are stopped simultaneously. Similarly, the timing of driving the second pump 28 may be changed.

[0048] Instead of the second pump 28, a pressure reducing valve (relief valve) may be placed in the expansion pipe 27. By using the pressure reducing valve, it is possible to prevent the hot water H from being discharged from the expansion pipe 27 of the hot water tank 13 even if the first pump 17 is driven when the drinking water W is discharged.

[0049] The drinking water dispenser 1 may supply or pour drinking water W by using a head difference. The first pump 17 is not limited to a positive displacement pump, but may be a non-positive displacement pump. The second pump 28 is not limited to a non-positive displacement pump, but may be a positive displacement pump.

[0050] The drinking water container 50 may be either a so-called gallon bottle (air-in, recyclable type) or a crushable bottle (airless, one-way, disposable type). The drinking water W filled into the drinking water container 50 is not limited to tap water, but may be other liquids. It is also possible that tap water is supplied to the drinking water dispenser 1 without using the drinking water container 50 .

[0051] The shapes, numbers, arrangements, etc. of the cold water tank 11, the hot water tank 13, and the drinking water container 50 are arbitrary. The drinking water container 50 may be fixed rather than detachable. [Explanation of symbols]

[0052] 1 drinking water dispenser 2 Server Housing 3 Water supply section 4 Water outlet 5 Water tray 6 Operation panel 7 Drawer section 8 Bottom plate part 9 Connecting part 11Cold water tank 12 Separator 13 Hot water tank 15,15a,15b Water supply pipe 17 First pump (positive displacement pump) 18 Water Purification Filter 21 Room temperature water outlet pipe 22 Normal temperature water outlet valve 23 Cold water outlet pipe 24 Cold water outlet valve 25 Hot water outlet pipe 26 Hot water outlet valve 27 Expansion tube 28 Second pump (water stop, non-positive displacement pump) 50 drinking water containers 53 Drinking water inlet 54 Valved outlet 55 Handle W Drinking water (tap water) C Cold water N Room temperature water H Hot water

Claims

1. a drinking water container into which drinking water is poured; a connecting portion to which the drinking water container is attached and detached; a cold water tank for storing cold water obtained by cooling the drinking water; a hot water tank for storing hot water obtained by heating the drinking water; a water supply pipe communicating with the connecting portion and supplying the drinking water to the cold water tank and the hot water tank, respectively; a cold water outlet pipe communicating with a lower portion of the cold water tank and supplying the cold water to a cold water outlet valve; a hot water outlet pipe communicating with the hot water tank and supplying the hot water to a hot water outlet valve; a water purification filter disposed in the water supply pipe to purify the drinking water; a first pump disposed in the water supply pipe and configured to supply the drinking water that has passed through the water purification filter toward the cold water tank and the hot water tank; an expansion pipe that communicates with an upper portion of the hot water tank and is capable of discharging the hot water; a water stopper disposed in the expansion pipe and stopping the hot water; A drinking water dispenser comprising:

2. The drinking water dispenser according to claim 1 , wherein the water stopper is driven in conjunction with the first pump.

3. 2. The drinking water dispenser according to claim 1, wherein the water stopper is a second pump that pushes the hot water in the expansion pipe back into the hot water tank.

4. 4. The beverage dispenser of claim 3, wherein the second pump is a non-positive displacement pump.

5. 2. The beverage dispenser of claim 1, wherein the first pump is a positive displacement pump.

6. a separator that divides the inside of the cold water tank into upper and lower sections; a room temperature water outlet pipe that is connected to an upper portion of the cold water tank and that supplies room temperature water to a room temperature water outlet valve; 2. The drinking water dispenser according to claim 1, further comprising:

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