JP4335273B2 - Drinking water server - Google Patents

Description

  In the present invention, after drinking water such as mineral water stored in a container is stored in a tank, the stored drinking water can be supplied at room temperature or cold temperature, or the stored drinking water can be appropriately supplied by heating. It relates to a drinking water server.

  For example, as shown in FIG. 5 (a), a conventional drinking water server is configured such that a container 1 can be attached to and detached from a water conduit 11 extending upward from a water storage tank 10, and the drinking water w in the container 1 is It flows down into the water storage tank 10 through the water conduit 11 by its own weight.

  The container 1 is molded of a hard resin or the like, and the drinking water w in a state of being sterilized in advance is sealed in a unit of about 20 liters and supplied to the market in a sealed state, for example. It is what. Since the container 1 is formed of a hard resin, its shape is maintained even if the drinking water w inside is reduced.

  As shown in FIG. 5 (b), the drinking water w in the container 1 gradually flows down toward the water storage tank 10, and the air a in the water storage tank 10 gradually enters the container 1 through the water conduit 11. Enters and the atmospheric pressure in the container 1 is maintained normally. At the same time, the air a in the water storage tank 10 is discharged from the vent 13 to the outside when the drinking water w flows in.

  When the water level in the water storage tank 10 reaches the lower end of the water conduit 11 as shown in FIG. 5C, the flow of air a into the container 1 stops. For this reason, the inside of the container 1 is in a so-called negative pressure state due to the flow-down pressure of the drinking water w about to flow down by its own weight, and it is impossible to flow down the drinking water w beyond that. That is, due to the balance between the air pressure acting on the liquid surface in the water storage tank 10 and the air pressure acting on the liquid surface in the container 1, the flow of water from the container 1 to the water storage tank 10 automatically stops. ing.

A water supply pipe 21 is drawn from the water storage tank 10, and a supply valve 20 that can be opened and closed is provided in the water supply pipe 21.
If the supply valve 20 is opened, the drinking water w in the water storage tank 10 can be appropriately supplied to the outside, and if the supply valve 20 is closed, the supply is stopped.

  Further, if the water level in the water storage tank 10 is lowered by the supply of drinking water w from the water supply pipe 21, the water level reaches the lower end of the water guide pipe 11 as shown in FIG. The drinking water w in the container 1 flows down into the water storage tank 10 until the balance is achieved, and the water level in the water storage tank 10 is maintained.

In addition, as shown in FIG. 6, there is a drinking water server that uses a container 1 formed of a flexible material such as a soft resin.
As in the case of the container 1 using the hard resin described above, the container 1 is in a state where the potable water w that has been previously sterilized is sealed and sealed in units of about 20 liters, for example. It is what is supplied to the market. Since the container 1 is molded of a soft resin, when the internal drinking water w decreases, the container 1 is deformed and the internal volume is contracted accordingly.

  Explaining the operation of this drinking water server, the drinking water w in the container 1 attached as shown in FIG. 6 (a) flows down into the water storage tank 10 and the drinking water w in the container 1 decreases. Then, the container 1 is contracted and deformed so that air does not enter the container 1 (see FIG. 6B). Reference numeral 15 in the figure indicates a vent hole, and reference numeral 16 indicates a filter provided in the vent hole 15.

A float valve 14 provided at the lower end of the water conduit 11 opens and closes the lower end opening of the water conduit 11 as the water level in the water storage tank 10 varies.
For this reason, the flow of water from the container 1 to the water storage tank 10 is caused by the float valve 14 closing the lower end opening of the water conduit 11 when the water level in the water storage tank 10 rises and reaches a predetermined position. It stops automatically (see FIG. 6C).

  Moreover, if the water level in the water storage tank 10 falls by supply of the drinking water w from the water pipe 21, the float valve 14 will open the lower end opening of the water conduit 11, and the drinking water w in the container 1 will store water. The water flows down into the tank 10 and the water level is maintained (see FIG. 6D).

  That is, in this drinking water server, since the flexible container 1 is used, it is assumed that air a does not enter the container 1. For this reason, unlike the drinking water server using the hard container 1 described above, the flow of the drinking water w is controlled by directly opening and closing the water conduit 11 leading to the container 1 using a valve. .

  In general, it can often be said that a cooling device (not shown) is provided in the water storage tank 10 to cool the drinking water in the water storage tank 10 and supply it as cold water.

Moreover, as shown in FIG. 7, there is also a drinking water server that can supply heated drinking water w (drinking water h).
In this drinking water server, a hot water tank 30 provided with a heating device 31 is provided below the water storage tank 10, and the hot water tank 30 and the water storage tank 10 are connected by a water supply pipe 32.
The drinking water w in the water storage tank 10 flows down into the hot water tank 30 through the water supply pipe 32, and the drinking water w in the hot water tank 30 is heated by the heating device 31.

A second water supply pipe 25 is drawn out from the hot water tank 30, and a second supply valve 24 that can be opened and closed is provided in the second water supply pipe 25.
For this reason, if the 2nd supply valve 24 is open | released, the drinking water w (The heated "drinking water w" will be described below as "drinking water h") in the warm water tank 30 can be suitably supplied outside, Moreover, if the 2nd supply valve 24 is closed, the supply will stop (for example, refer patent document 1).

  There is also a drinking water server in which the water supply pipe 21 and the supply valve 20 provided in the water storage tank 10 are omitted and only heated “drinking water h” is supplied.

JP 2003-104494 A

According to the drinking water server shown in FIG. 5, the drinking water w in the resin container 1 or the water storage tank 10 is always in contact with the air a.
It can be said that it is desirable for hygiene management that the drinking water w does not touch the air a as much as possible.

In this regard, the drinking water server shown in FIG. 6 is more preferable because air a does not enter the resin container 1.
However, it is inevitable that the drinking water w in the water storage tank 10 touches the air a.

  Moreover, according to the drinking water server shown in FIG. 7, since the drinking water h in the hot water tank 30 has a high temperature, the drinking water h expands with heating and rises by flowing backward in the water supply pipe 32. There is.

When the heated drinking water (warm water) h flows backward in the water supply pipe 32, the drinking water h heated from the opening 32 a on the water storage tank 10 side of the water supply pipe 32 is contained in the water storage tank 10 as shown in FIG. 7. It enters and raises the temperature of the drinking water w in the water storage tank 10. In addition, the pipe body itself of the water supply pipe 32 functions as a heat conductor, which may increase the temperature of the drinking water w in the water storage tank 10. This tendency is more remarkable when the water storage tank 10 is provided with a cooling device because the temperature difference between the drinking waters w and h in both the tanks 10 and 30 increases.
It is not desirable for the management of the drinking water w that the temperature of the drinking water w in the water storage tank 10 that should not be heated rises.

  In view of this, the first object of the present invention is to suppress drinking water from touching air as much as possible, and in a drinking water server that can supply heated drinking water, drinking water in a water storage tank is provided. The second problem is to suppress the temperature rise.

  In order to solve the first problem, the present invention is such that a container can be attached to and detached from a water conduit extending upward from a water storage tank, and drinking water in the container flows into the water storage tank through the water conduit. The water supply pipe is pulled out from the water storage tank, and an openable / closable supply valve is provided in the water supply pipe so that drinking water in the water storage tank can be supplied. The container is formed of a flexible material. When the drinking water in the container flows down into the water storage tank and the drinking water in the container decreases, the container shrinks and deforms so that air does not enter the resin container. In the drinking water server, an air valve is provided at an upper end in the water storage tank, and the water in the water storage tank is discharged through the air valve to cause the water in the container to flow down. The Employing the configuration to be able to maintain the water state.

  In this way, the flow of drinking water from the container can be controlled via the air valve provided at the upper end in the water storage tank, rather than opening and closing the water conduit leading to the container. If discharged, the inside of the water storage tank can be kept full. For this reason, not only the inside of the container but also the drinking water in the water storage tank can be suppressed as much as possible.

That is, since the container shrinks and deforms as the drinking water inside decreases so that air does not enter the container, when air is present above the drinking water in the water storage tank, When the air is discharged through the air valve, the drinking water can flow down into the water storage tank without mixing air into the container, and the water storage tank can always be kept full. .
Here, the full water state means a state in which the air in the water storage tank is completely exhausted, or even if a slight amount of air is present, the state is almost the state in which the air has almost completely disappeared. According to this, the water storage tank can be filled with drinking water until the water is full.

  The air valve may be configured to open and close by manual operation, and to discharge air intervening in the water storage tank at an appropriate timing. Adopting a structure that is opened and closed by a float valve element that moves up and down with the fluctuation of the water level is convenient because air can be automatically discharged by raising and lowering the float valve.

  In order to solve the second problem, the present invention provides a hot water tank provided with a heating device below the water storage tank, the hot water tank and the water storage tank are connected by a water supply pipe, Drinking water in the water storage tank flows down into the heating tank through the water supply pipe, and a second supply valve that can be opened and closed is provided in the second water supply pipe by drawing out the second water supply pipe from the heating tank. The drinking water in the heating tank was supplied, and the water supply pipe was connected to the upper part of the water storage tank or the water conduit.

With the solution of the first problem, the drinking water in the water storage tank can always be kept full. For this reason, the structure which connected the water supply pipe of a water storage tank and a warm water tank to the upper part of a water storage tank or a water conduit came to be employable.
If the water supply pipe can be connected to the upper part of the water storage tank or a water guide pipe extending upward from the water storage tank, the length of the water supply pipe will be increased, so that the temperature rise of the drinking water in the water storage tank due to the reverse flow of heated drinking water, And the temperature rise by the heat conduction through the water supply pipe itself can be prevented.
If this water supply pipe is pulled out from the lower part of the hot water tank, the length of the water supply pipe can be further increased, which is more preferable.

In addition, since the water supply pipe connecting the water storage tank and the hot water tank can be connected to the upper part of the water storage tank or the water conduit, the water supply pipe can be piped outside the water storage tank. This is because it is not necessary to make the water supply pipe enter the water storage tank and take water from the central portion as in the conventional case.
If the water supply pipe is provided outside the water storage tank, it is easy to provide an open / close valve (closing valve) at the connection between the water supply pipe and the water storage tank or the water conduit. If it is outside the water storage tank, it is easy to operate and attach the on-off valve, and a general-purpose product can be used as the on-off valve device.

The reason for providing the on-off valve (closing valve) in this way is as follows.
That is, conventionally, in a drinking water server provided with a water storage tank and a hot water tank, for example, during periods when hot water is not used, such as in summer, the heating device is not activated and drinking water is supplied from the hot water tank. There were many cases to stop. At this time, since the drinking water stays in the hot water tank for a long time as it is, an on-off valve (closing valve) is provided in the middle of the water supply pipe so that the water does not flow into the hot water tank.

However, when the upper end of the water supply pipe has entered the water storage tank, it is difficult to provide an open / close valve at the upper end of the water supply pipe, and thus the open / close valve has to be provided in the middle of the water supply pipe. If the on-off valve is provided in the middle of the water supply pipe, water retention (so-called “dead water”) is generated between the upper end of the water supply pipe and the on-off valve.
Therefore, by connecting the water supply pipe to the upper part of the water storage tank or the water guide pipe as described above, an open / close valve can be provided near the upper end of the water supply pipe. In this way, the retention of water in the water supply pipe can be more reliably eliminated.

  There is also a drinking water server in which a water supply pipe and a supply valve provided in a water storage tank are omitted and only heated drinking water is supplied through a hot water tank.

  The structure is such that a container can be attached to and detached from a water conduit extending upward from the water storage tank, and the drinking water in the container flows into the water storage tank through the water conduit and is heated below the water storage tank. A hot water tank provided with a device is provided, the hot water tank and the water storage tank are connected by a water supply pipe, and the drinking water in the water storage tank flows into the hot water tank through the water supply pipe, A water supply pipe is pulled out from the hot water tank and an openable / closable supply valve is provided to the water supply pipe so that drinking water in the hot water tank can be supplied. The container is formed of a flexible material, When the drinking water flows down into the water storage tank and the drinking water in the container decreases, the container shrinks and deforms so that air does not enter the container. In this case, an air valve is provided at the upper end of the water storage tank, and the water in the water storage tank is discharged through the air valve to cause the drinking water in the container to flow down, so that the water storage tank is filled with water. A drinking water server characterized in that it can be maintained.

  If the drinking water server in each of the above configurations is used, the container is contracted and deformed as the drinking water in the container decreases, so that air does not enter the container. A water supply method can be employed.

  That is, when air is present above the drinking water in the water storage tank, if the air is discharged through an air valve provided at the top of the water storage tank, the air is mixed into the container along with the air being discharged. This is a drinking water supply method in which drinking water is further flowed down into a water storage tank and the water storage tank is maintained in a full state.

In addition, the drinking water stored in the water storage tank may adopt a supply method of supplying to the outside through a water supply pipe drawn from the water storage tank and an openable / closable supply valve provided in the water supply pipe. Or in addition thereto, the drinking water in the water storage tank is led to a hot water tank provided below, and the drinking water heated in the hot water tank is drawn into the water pipe and the water pipe drawn from the hot water tank. You may employ | adopt the supply method supplied to the exterior through the provided openable / closable supply valve.
That is, by adopting this supply method, until the air in the water storage tank is completely exhausted, or even if a slight amount of air is interposed, the water is stored until the air is almost completely exhausted. The tank can be filled with drinking water. Therefore, the water storage tank can always be kept full.

  Since the present invention has been described above, it is possible to suppress the drinking water from touching the air as much as possible, and in the drinking water server that can supply the heated drinking water, The rise in the temperature of drinking water can be suppressed.

  An embodiment of the present invention will be described with reference to the drawings. In the drinking water server of this embodiment, as shown in FIG. 2, a resin container (container) 1 can be attached to and detached from a water conduit 11 extending upward from a water storage tank 10 provided with a cooling device 29. The drinking water w in the container 1 flows into the water storage tank 10 through the water conduit 11 by its own weight.

The resin container 1 and the water storage tank 10 are housed in the container housing part 3 and the main body 4 of the drinking water server 2 shown in FIG. A water supply pipe 21 is drawn out from the water storage tank 10 and extends outside the main body 4, and a supply valve 20 that can be freely opened and closed is provided in the water supply pipe 21 (see FIG. 2).
If the supply valve 20 is opened, the drinking water w in the water storage tank 10 can be appropriately supplied from the supply unit 5 shown in FIG. 1 to a container such as an external cup or plastic bottle, and if the supply valve 20 is closed. The supply is stopped. The supply valve 20 can be opened and closed by operating a lever provided in the supply unit 5.

  The drinking water server 2 is provided with a hot water tank 30 having a heating device 31 below the water storage tank 10, and the hot water tank 30 and the water storage tank 10 are connected by a water supply pipe 32. ing. The water supply pipe 32 is connected to the upper part of the water storage tank 10 and the lower part of the hot water tank 30.

  Through this water supply pipe 32, the drinking water w in the water storage tank 10 flows into the hot water tank 30 by its own weight. Note that the cooling device 29 can employ, for example, well-known cooling means having a function of cooling the drinking water w in the water storage tank 10 by flowing a refrigerant in the pipe, and the heating device 31 is energized. An electric heater or the like having a function of heating the drinking water w in the hot water tank 30 can be adopted.

  The hot water tank 30 and the heating device 31 are also accommodated in the main body 4 of the drinking water server 2 shown in FIG. A second water supply pipe 25 is drawn laterally from the hot water tank 30 and extends out of the main body 4, and a second supply valve 24 that can be opened and closed is provided in the second water supply pipe 25.

  If the second supply valve 20 is opened, the heated drinking water h in the hot water tank 10 can be appropriately supplied from the supply unit 6 shown in FIG. 1 to a container such as an external cup or a plastic bottle. If 24 is closed, the supply will stop. Similarly, the second supply valve 24 can be opened and closed by operating a lever provided in the supply unit 6.

  Discharge pipes 23 and 27 with discharge valves 22 and 26 are provided at the bottoms of the water storage tank 10 and the hot water tank 30, respectively. Both the discharge valves 22, 26 are normally kept closed. By opening the discharge valves 22 and 26 respectively, foreign matter or the like that has settled at the bottom of the water storage tank 10 and the hot water tank 30 can be discharged together with the internal drinking water w.

  Note that the bottom of the water storage tank 10 or the hot water tank 30 is tapered, for example, as the water storage tank 10 shown in FIG. It can be said that the foreign matter discharging effect is further enhanced if the opening is provided at the lowermost end.

  The resin container 1 containing the drinking water w is supplied to the market in a state where the drinking water w in a state of being sterilized in advance is sealed and sealed, and the resin container 1 A water guide pipe 11 extending upward from the water storage tank 10 can be inserted into one opening.

As the attachment / detachment structure of the resin container 1, a known structure may be adopted, but in this embodiment, as described above, by attaching the water conduit 11 into the opening of the resin container 1. The resin container 1 is supported by the pedestal 17 and the liquid tightness between the opening and the water guide pipe 11 is maintained by packing or the like.
For this reason, the drinking water w in the resin container 1 flows down into the water storage tank 10 through the water conduit 11 by its own weight without spilling around.

  As described above, the liquid tightness is maintained between the inner periphery of the opening of the resin container 1 and the outer periphery of the water conduit 11, but if there is a slightly spilled drinking water w, the drinking water w is discharged to the receiving portion 19 through discharge paths 18a and 18c provided at the bottom of the concave portion 17a of the base 17. For this reason, the spilled water does not stay in the recess 17a of the base 17.

  The resin container 1 is formed of a flexible resin. For this reason, when the water conduit 11 is inserted into the opening with the opening of the resin container 1 facing downward, the internal drinking water w naturally flows into the water storage tank 10 by its own weight. At this time, as the drinking water w in the resin container 1 decreases, the resin container 1 contracts and deforms so that its internal volume decreases, so that air does not enter the resin container 1. .

  Further, an air valve 28 is provided at the upper end in the water storage tank 10. The air valve 28 is provided so as to face the convex portion 10a provided at the upper end of the water storage tank 10, and as shown in FIGS. 2B and 2C, the valve body 28a is moved by the urging force of an elastic member such as a spring. Energized in the valve closing direction. Further, the valve element 28a is moved in the valve opening direction by pushing the valve shaft (operation part) 28b by hand against the urging force.

  For this reason, when the air a is interposed on the liquid level of the drinking water w stored in the water storage tank 10 and the air a enters the convex portion 10a, the valve shaft (operating portion) 28b is manually operated. The air a can be discharged to the outside through the air valve 28. In addition, it is desirable that the air valve 28 faces the uppermost part in the convex part 10a so that all the air a interposed in the convex part 10a can be discharged.

The operation of this drinking water server 2 will be described. In a state where there is no drinking water w in the water storage tank 10, the resin container 1 is inserted into the water conduit 11 and the resin container 1 is fixed to the pedestal 17. The drinking water w in the resin container 1 gradually flows down into the water storage tank 10 due to its own weight, and the resin container 1 contracts and deforms.
If the air pressure in the water storage tank 10 increases due to the flow of the drinking water w, the flow of the drinking water w automatically stops temporarily due to the increase in the air pressure. At this time, if the air valve 28 is opened to discharge the internal air a to the outside of the water storage tank 10, the flow of the drinking water w starts again.
For this reason, the air valve 28 may be kept open for a certain time until a certain amount of the drinking water w is accumulated in the water storage tank 10, or while watching the flow down state of the drinking water w. When the flow stops, the air valve 28 may be opened intermittently, such as opening the air valve 28 each time.

In this way, the water level in the water storage tank 10 gradually increases, and when the water level reaches the opening 32b on the water storage tank 10 side at the upper end of the water supply pipe 32, the water level is transferred to the hot water tank 30 through the water supply pipe 32. Will flow down due to its own weight. At this time, the discharge operation of the air a similar to the water storage tank 10 is performed also in the hot water tank 30. That is, for example, when the flow of the drinking water w from the water supply pipe 32 stops, the second supply valve 24 is appropriately opened to discharge the internal air a to the outside of the hot water tank 30 through the second water supply pipe 25. Perform the operation.
During this time, if the drinking water w in the resin container 1 runs out, the resin container 1 containing new drinking water w may be appropriately replaced.

  When the hot water tank 30 and the water storage tank 10 are full and the water level in the water storage tank 10 reaches the position shown in FIG. 2B, air a has accumulated in the convex portion 10a provided at the upper end of the water storage tank 10. In this state, the flow of water from the resin container 1 to the water storage tank 10 automatically stops.

  In this state, if the air valve 28 is manually operated and opened, the air a in the convex portion 10a can be discharged toward the external receiving portion 19 through the discharge paths 18b and 18c. At this time, the drinking water w is also slightly discharged mixed with the air a, but the amount thereof is so small that it does not matter.

When the air a is discharged in this way, the drinking water w further flows down from the resin container 1 so as to fill the gap in the convex portion 10a. For this reason, the water level in the water storage tank 10 reaches a full water state as shown in FIG. 2 (c), that is, a state where no air a is present, or even a small amount even if it is present.
As described above, by appropriately opening and closing the air valve 28, the inside of the water storage tank 10 can be always maintained in a full water state.

As shown in FIG. 1, a water supply pipe 32 is piped along the outer surfaces of the water storage tank 10 and the hot water tank 30, and an open / close valve (closed) is connected to a connection portion between the water supply pipe 32 and the upper part of the water storage tank 10. Valve) 33 is provided.
For this reason, for example, when the heated drinking water h is not supplied, such as in summer, the heating device 31 is not operated, and the on-off valve 33 is closed so that water does not flow into the hot water tank 30. can do. That is, the inside of the hot water tank 30 can be emptied, and the drinking water w can be prevented from staying in the hot water tank 30 for a long time.

  In this embodiment, the air valve 28 that opens and closes by manual operation is employed. However, as the air valve 28, for example, a float valve element that moves up and down with a change in the water level in the water storage tank 10 may be employed.

  When the float valve body is used, the water level of the drinking water w is slightly lower than the full water level when the air a accumulates near the upper end of the water storage tank 10 (see, for example, the water level shown in FIG. 2A). The float valve body also descends as it descends. When the float valve body is lowered, the air valve 28 is opened, so that the air a is discharged to the outside. If the air a is discharged, the water level in the water storage tank 10 rises (see, for example, the water level shown in FIG. 2B), so that the float valve body also rises due to the rise in the water level, closes the air valve 28, The water storage tank 10 can be sealed in the state.

Moreover, in said embodiment, the opening part 32b of the upper end of the water supply pipe 32 which connects the water storage tank 10 and the hot water tank 30 is provided with the lid | cover 10b which can be opened and closed which closes the upper part of the water storage tank 10, ie, the upper surface of the water storage tank 10. An opening is provided immediately below the packing p that is liquid-tightly closed.
For this reason, compared with the past, the length of the water supply pipe 32 can be ensured long. Since the water supply pipe 32 is long, the temperature rise of the drinking water w in the water storage tank 10 due to the back flow of the drinking water h heated in the hot water tank 30, and the water storage tank by heat conduction through the pipe body itself of the water supply pipe 32 The temperature rise of the drinking water w in 10 can be prevented.

The water supply pipe 32 is desirably opened as high as possible in the water storage tank 10. However, for example, the water supply pipe 32 may function even if it is opened in an openable / closable lid 10 b that closes the upper surface of the water storage tank 10.
In addition, the opening 32c toward the hot water tank 30 at the lower end of the water supply pipe 32 is desirably opened as low as possible in the hot water tank 30 in order to lengthen the water supply pipe 32.

Another embodiment is shown in FIG. In this embodiment, the water supply pipe 32 in the above embodiment is connected in the middle of the water conduit 11 extending upward from the water storage tank 10.
According to this configuration, since the length of the water supply pipe 32 is further increased, the temperature rise of the drinking water w in the water storage tank 10 due to the back flow of the heated drinking water h can be more reliably prevented.

Yet another embodiment is shown in FIG. In this embodiment, the hot water tank 30, the water supply pipe 32, and the like are omitted. The drinking water w stored in the water storage tank 10 can be supplied through the water supply pipe 21 and the supply valve 20.
The air valve 28 provided in the water storage tank 10 employs a float valve, and the main configuration is the same as that of the above-described embodiment.

  In the state shown in FIG. 4A, if the water conduit 11 is inserted into the opening of the resin container 1, the resin container 1 is supported by the pedestal 17 and the drinking water w in the resin container 1 is guided. It flows down naturally by its own weight into the water storage tank 10 through the water pipe 11.

  Since the resin container 1 is formed of a flexible material, when the drinking water w in the resin container 1 gradually decreases, the resin container 1 shrinks and deforms with the decrease, and the resin container 1 The point that air does not enter 1 is the same as in the above-described embodiments.

  The drinking water w in the water storage tank 10 gradually increases in water level, and during that time, the air a in the water storage tank 10 is discharged to the outside through the air valve 28 as shown by the arrow in FIG. The When the water level in the water storage tank 10 passes the position of FIG. 4B and reaches the position of FIG. 4C, the air a accumulated in the convex portion 10a provided at the upper end of the water storage tank 10 is discharged completely. As a result, the air valve 28 is closed and the water storage tank 10 is sealed. In this state, the flow of the drinking water w from the resin container 1 to the water storage tank 10 automatically stops.

  In this state, when a little air a enters the water storage tank 10 from the resin container 1 or the like, or when a little air a remains in the water storage tank 10, the operation portion 28b of the air valve 28 is turned on. When manually operated by pushing downward, the float valve body is lowered and the air valve 28 is opened, so that the air a in the convex portion 10a can be discharged to the outside through the discharge passages 18b and 18c.

  When air a is discharged through the air valve 28, the drinking water w further flows down from the resin container 1 so as to fill the gap in the convex portion 10a, so that the water storage tank 10 is always filled. The point which can be maintained is the same as that of the above-mentioned embodiment.

  In each of the above embodiments, the cooling device 29 provided in the water storage tank 10 can be selectively provided as necessary.

The front view of the server for drinking water of one embodiment (A) is a front view showing the internal structure of FIG. 1, (b) (c) is an enlarged view of the main part showing the action of the air valve. Front view of another embodiment (A)-(d) is a front view which shows the effect | action of other embodiment further. (A)-(d) is a front view which shows the effect | action of a prior art example. (A)-(d) is a front view which shows the effect | action of a prior art example. Front view of conventional example

Explanation of symbols

1 Container (resin container)
2 Drinking water server 3 Container storage unit 4 Body 5 Drinking water supply unit (normal temperature water)
6 Drinking water supply section (hot water)
DESCRIPTION OF SYMBOLS 10 Water storage tank 10a Convex part 11 Water guide pipes 14, 28 Float valves 13, 15 Vent 16 Filter 17 Base 17a Concave parts 18a, 18b, 18c Discharge path 19 Receiving part 20 Supply valve 21 Water supply pipes 22, 26 Discharge valves 23, 27 Discharge Pipe 24 Second supply valve (supply valve)
25 Second water pipe (water pipe)
28 Air Valve 28a Valve Body 28b Valve Shaft (Operation Unit)
29 Cooling device 30 Hot water tank 31 Heating device 32 Water supply pipe 33 On-off valve

Claims (3)

Conduit extending from the water storage tank (10) upwards (11) the container (1) are possible removable, drinking water in the container (1) (w) is the conduit (11) through the water storage tank (10) adapted to flow down the inner, the water storage tank (10) from a water pipe (21) is pulled out the water pipes (21) that the water storage tank provided with openable supply valve (20) to (10) to allow the supply of drinking water (w), the container (1) is formed of a flexible material, flow down into the container (1) in drinking water (w) is the water storage tank (10) to when the drinking water of the container (1) in (w) decreases, the container (1) the water conduit in the container (1) in contracted deformed so that the internal volume is reduced (11 ) so air (a) it does not enter from the side In drinking water are server,
The lid (10b) for closing the upper surface of the water storage tank ( 10 ) is provided with a convex portion (10a), and the convex portion (10a) forms a space protruding upward in the water storage tank (10), and The lid (10b) is located above the opening of the water conduit (11) into the water storage tank (10),
The water tank (10) is provided with an air valve ( 28 ) facing the space in the convex portion (10a), and the air valve ( 28 ) is used for drinking water (w) stored in the water tank (10). ) Is present on the liquid surface, and the air (a) enters the convex portion (10a), the air valve (28) is opened and the water storage tank ( 10 ). By discharging the air ( a ) in the water tank (10) out of the water tank (10 ) , the beverage in the container ( 1 ) is filled so as to fill the gap in the water tank (10) as the air (a) is discharged. water (w) and passed down a function to shrink deforming the container (1), the air by a stream and contraction deformation of the container (1) of the drinking water (w), the water storage tank (10) It is characterized in that to be able to maintain, if not full level of (a) For drinking water server. Conduit extending from the water storage tank (10) upwards (11) the container (1) are possible removable, drinking water in the container (1) (w) is the conduit (11) through the water storage tank (10) adapted to flow down the inner, the water storage tank (10) from a water pipe (21) is pulled out the water pipes (21) that the water storage tank provided with openable supply valve (20) to (10) to allow the supply of drinking water (w), the container (1) is formed of a flexible material, flow down into the container (1) in drinking water (w) is the water storage tank (10) to when the drinking water of the container (1) in (w) decreases, the container (1) server for drinking water which is adapted to the air does not enter into the container (1) in contracted deformation In
The water storage tank (10) to the upper end of the provided air valve (28), the water storage tank the container (1) in by discharging (10) of the air (a) through the air valve (28) Of drinking water ( w ) so that the water storage tank ( 10 ) can be kept full ,
A hot water tank ( 30 ) provided with a heating device ( 31 ) is provided below the water storage tank ( 10 ) , the hot water tank ( 30 ) and the water storage tank ( 10 ) are connected by a water supply pipe ( 32 ) , the water storage tank (10) in drinking water (w) is controlled so as to flow down into the hot water tank (30) through the water supply pipe that (32), the second water supply pipe from the hot water tank (30) (25 ) And the second water supply pipe ( 25 ) is provided with a second supply valve ( 24 ) that can be freely opened and closed to supply drinking water ( w, h ) in the hot water tank ( 30 ) ,
The water supply tube (32), connected to the top of the water storage tank (10), the water supply pipe (32) the piping in the water storage tank (10) vertically outside and the reservoir and its water supply pipe (32) tank (10) top and drinking water for servers that wherein the opening and closing valve (33) provided on the connecting portion of the. Conduit extending from the water storage tank (10) upwards (11) the container (1) are possible removable, drinking water in the container (1) (w) is the conduit (11) through the water storage tank (10) A hot water tank ( 30 ) provided with a heating device ( 31 ) is provided below the water storage tank ( 10 ) , and the hot water tank ( 30 ) and the water storage tank ( 10 ) Connected by a water supply pipe ( 32 ) , the drinking water ( w ) in the water storage tank ( 10 ) flows into the hot water tank ( 30 ) through the water supply pipe ( 32 ) , and the hot water tank The water pipe ( 25 ) is pulled out from ( 30 ) and an openable / closable supply valve ( 24 ) is provided in the water pipe ( 25 ) so that drinking water ( w, h ) in the hot water tank ( 30 ) can be supplied. The above Container (1) is formed of a flexible material, said container (1) in the drinking water (w) is the water storage tank (10) flows down into the container (1) in drinking water (w ) Decreases, the container ( 1 ) contracts and deforms so that the internal volume decreases, and air (a) does not enter the container ( 1 ) from the water conduit (11) side. Drinking water servers
The lid (10b) for closing the upper surface of the water storage tank ( 10 ) is provided with a convex portion (10a), and the convex portion (10a) forms a space protruding upward in the water storage tank (10), and The lid (10b) is located above the opening of the water conduit (11) into the water storage tank (10),
The water tank (10) is provided with an air valve ( 28 ) facing the space in the convex portion (10a), and the air valve ( 28 ) is used for drinking water (w) stored in the water tank (10). ) Is present on the liquid surface, and the air (a) enters the convex portion (10a), the air valve (28) is opened and the water storage tank ( 10 ). By discharging the air ( a ) in the water tank (10) out of the water tank (10 ) , the beverage in the container ( 1 ) is filled so as to fill the gap in the water tank (10) as the air (a) is discharged. water (w) and passed down a function to shrink deforming the container (1), the air by a stream and contraction deformation of the container (1) of the drinking water (w), the water storage tank (10) It is characterized in that to be able to maintain, if not full level of (a) For drinking water server.

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