JP4827937B2 - Hot water storage tank - Google Patents

Description

  The present invention relates to a hot water storage tank that is mounted on a moving body such as a train, a ship, and an aircraft and provides an effective structure.

  A hot water storage tank that is mounted on a moving body such as a train, a ship, or an aircraft is light and relatively small in size. Moreover, since the hot water storage tank is inclined during use due to the shaking, impact, and posture of the moving body, it is required to have a structure that does not easily discharge hot water to the outside. Therefore, as a structure of an aircraft water heater (hot water storage tank) in which hot water is dripped from a boiler located at the top to a hot water storage tank located at the bottom, a dripping gate that receives the hot water dripped from the boiler. In addition, there is one in which a cylindrical body having a tip portion with a small hole is attached so that the tip end can be suspended in a hot water storage tank (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 60-47418 (Fig. 2)

  Since the conventional hot water storage tank is configured as described above, it is possible to prevent hot water from being discharged from the dripping gate of the hot water storage tank in response to shaking during flight or impact during landing. However, the structure of a conventional hot water storage tank may be effective when there is a short period of impact or the amount of hot water in the hot water storage tank is small. The hot water once intruded into the hot water tank does not sufficiently return to the hot water storage tank before the next hot water enters, so it may overflow from the upper part. In particular, when taking off at a relatively long time during take-off, such as a jet aircraft, it is not possible to cope with it without reducing the amount of hot water in the hot water storage tank. Therefore, there may be a problem that the dripping operation of hot water from the boiler must be stopped.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a hot water storage tank capable of preventing inadvertent discharge of hot water with respect to inclination at any angle.

  A hot water storage tank according to the present invention is a hot water storage tank for storing hot water fed from a tapping pipe of a hot water heating mechanism, wherein one open end is provided at a predetermined position in the upper portion of the hot water storage tank, and an intermediate portion is provided inside or outside the hot water storage tank. Then, it circulates on a substantially flat surface of the upper part of the hot water storage tank including one open end, hangs down toward the bottom surface of the hot water storage tank, and the other open end is exposed to the outside from the bottom surface of the hot water storage tank. With a vent pipe.

  According to this invention, even if the hot water storage tank is inclined at any angle, there is an effect that hot water is not inadvertently discharged from the inside.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view showing an external structure of an electric water heater to which a hot water storage tank according to Embodiment 1 of the present invention is applied. It is explanatory drawing for demonstrating the operation | movement at the time of the inclination of the hot water storage tank which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows schematic structure of the hot water storage tank by Embodiment 2 of this invention. It is explanatory drawing which shows operation | movement of the hot water storage tank which concerns on Embodiment 2 of this invention.

Embodiment 1 FIG.
1 is a partially cutaway perspective view showing an external structure of an electric water heater to which a hot water storage tank according to Embodiment 1 of the present invention is applied. FIG. 2 is an explanatory diagram for explaining the operation of the hot water storage tank according to the first embodiment when it is inclined.
In the figure, reference numeral 10 denotes a cylindrical water heater tank (water heater mechanism) formed of metal, and is provided with an electric heater having a U-shape, for example. A water injection pipe 14 is attached to a water injection port provided at one end of the cylindrical body of the hot water tank 10. In addition, one end of a hot water discharge pipe 15 for feeding heated hot water is attached to a hot water outlet provided at the other end of the cylindrical body. Here, the vertical positional relationship between the water injection pipe 14 and the tapping pipe 15 is set so that the water injection pipe 14 is located at the lower part of the cylindrical body and the water pouring pipe 15 is located at the upper part of the cylindrical body. Accordingly, when the hot water tank 10 is horizontally disposed and used, the water injected from the water injection pipe 14 is filled into the cylindrical body from below. After the water is full, it is heated by an electric heater extending in the longitudinal direction, and hot water having the highest temperature is taken out from the tapping pipe 15.

  Reference numeral 16 denotes a water supply pipe drawn from a water supply or water storage tank (not shown), and is connected to the water injection pipe 14 via the water flow rate adjusting means 17. This water flow rate adjusting means 17 has a generally used structure having an electrically operated electromagnetic valve and a throttling function, and performs water injection when the hot water in the hot water tank 10 reaches a desired temperature (for example, 90 ° C.). And the water flow rate is controlled according to the hot water temperature. In response to this water pouring operation, hot water that has reached a desired temperature in the hot water tank 10 is continuously pushed out through the hot water discharge pipe 15 and flows into the hot water storage tank 30 to which the other end of the hot water discharge pipe 15 is directly connected. It is done. The hot water storage tank 30 is provided with an electric heater (see FIG. 2) 50 in the central recess 34 of the bottom surface 33 to keep the stored hot water warm. Hot water stored in the hot water storage tank 30 is supplied to the outside through a hot water supply pipe 36 attached to the bottom side of the hot water storage tank 30 as necessary.

  The shape of the hot water storage tank 30 is a rectangular parallelepiped, and hot water is injected from the upper part of one side surface 31 through the hot water discharge pipe 15. The hot water storage tank 30 is provided with a ventilation pipe 40 serving as an air release means. The ventilation pipe 40 has one open end 41 positioned at a corner of the upper surface 32 in the hot water storage tank 30, and the intermediate portion 43 circulates on a substantially flat surface of the upper part of the hot water storage tank 30 including the one open end 41. . That is, in the example of FIG. 1, along the edge of the upper surface 32 of the hot water storage tank 30, it returns to one open end 41 via the general four corners of the upper surface 32. A pipe is provided so as to hang down toward the bottom surface 33 of the hot water storage tank 30 in the vicinity of one open end 41 and to expose the other open end 42 to the outside of the hot water storage tank 30. A water level sensor 60 is provided near the open end 41 of the ventilation pipe 40 above the hot water storage tank 30. The vent pipe 40 may be exposed to the outside at the upper part of the hot water storage tank 30 without hanging down toward the bottom surface 33 of the hot water storage tank 30.

As shown in FIG. 2, when the hot water storage tank 30 is inclined, the open end 41 side of the ventilation pipe 40 is located below the water surface W and is submerged. However, since the intermediate part 43 of the ventilation pipe 40 located on the opposite side is located above the water surface W, hot water does not flow out to the outside. Further, according to this structure, no matter how the hot water storage tank 30 is inclined, the air pool can be above the water surface W, so that the outflow of hot water can be prevented.
On the other hand, when the hot water storage tank 30 is sequentially poured in a state where the hot water storage tank 30 is inclined and the open end 41 of the vent pipe 40 is submerged, the hot water will eventually flow out from the open end 42 through the vent pipe 40. Can be considered. However, in the first embodiment, when the open end 41 is submerged, the water level sensor 60 detects the water level, and controls to stop the hot water from the hot water tank 10 based on the detection output. Further, even when the hot water storage tank 30 is in a normal posture, the hot water can be prevented from being fed from the side of the hot water tank 10 when the water is full.

In the above example, most of the piping of the ventilation pipe 40 is set in the hot water storage tank 30, but as another example, only the open end 41 of the ventilation pipe 40 is located inside the hot water storage tank 30, and the rest A similar operation can be expected as a structure in which all the pipes are taken out of the hot water storage tank 30, run around the outer periphery of the hot water storage tank 30 along the extended surface of the upper surface 32, and piped from the vicinity of the open end 41 toward the bottom.
The hot water storage tank has been described as having a rectangular parallelepiped shape. However, the hot water storage tank may have a shape having an upper surface with a predetermined area at the time of installation, for example, a cylindrical body or an inverted cone, and the hot water storage tank may not be a flat surface on the upper surface of the hot water storage tank. A similar operation can be expected if it can be used as a tank and can have a substantially flat space around which the ventilation pipe can circulate.
Furthermore, the ventilation pipe penetrated when the hot water storage tank was placed in a normal posture if the part that circulates the upper part of the hot water storage tank was slightly inclined downward or upward from the starting point to the end point. Hot water can also be easily led to the outside or inside.

  As described above, according to the first embodiment, the vent pipe is provided as the atmosphere opening means of the hot water storage tank, one open end thereof is provided at a predetermined position in the upper part of the hot water storage tank, and the intermediate portion is provided in the hot water storage tank. Inside or outside, so as to circulate on a substantially flat surface of the upper part of the hot water storage tank including one open end and to pipe outside the hot water storage tank, and to expose the other open end to the outside of the hot water storage tank Therefore, it is possible to obtain an effect that the hot water is not inadvertently discharged from the inside even if the hot water storage tank is inclined at any angle. Also, a water level sensor is provided near one open end of the ventilation pipe, and when the water level sensor detects the water level, pouring from the hot water boiling mechanism is stopped by the detection output. When the water is submerged, it is possible to prevent the hot water fed from the water heating mechanism from being inadvertently discharged through the ventilation pipe.

Embodiment 2. FIG.
FIG. 3 is an explanatory view showing a schematic structure of a hot water storage tank according to Embodiment 2 of the present invention, and the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals. The second embodiment is added to the configuration described in the first embodiment, but the parts already described in the first embodiment are omitted for the sake of simplicity. To do.
A vertical line passing vertically through the center of the hot water storage tank 30 is set up, and a plurality of points A, B, and C located at predetermined intervals on the vertical line are assumed. Water detection sensors are provided on a pair of side surfaces 31 and 31 that are on a horizontal cross section including each of these points A, B, and C and that are symmetrical with respect to the points A, B, and C, respectively. Specifically, in FIG. 3, water detection sensors a1 and a2 that are symmetric with respect to point A are water detection sensors b1 and b2 that are symmetric with respect to point B, and water detection sensors c1 and c2 that are symmetric with respect to point C are side surfaces 31. , 31 are provided respectively.

FIG. 4 is an explanatory view showing the operation of the hot water storage tank according to Embodiment 2, and shows a state where the hot water storage tank 30 is inclined at an angle.
When the hot water storage tank 30 is tilted and the amount of hot water inside is at the water level W1, the water detection sensors a2, b1, b2, c1, and c2 detect water, and only a1 is not detected. Since this state is almost full, when the number of detection outputs of the water detection sensor is 5, it is determined as full by a determination circuit (not shown), and control is performed so as to limit hot water supply from the hot water heating mechanism. Next, in the case of the water level W2, the water detection sensors b2 and c2 detect water, and the others are not detected. In this state, the amount of hot water is reduced, but the electric heater 50 is still covered. Therefore, when the number of detection outputs of the water detection sensor is 2 or more, it is determined as a safe state. Further, in the case of the water level W3, only the water detection sensor c2 detects water, and the others are not detected. In this state, the amount of hot water is considerably reduced, and the electric heater 50 is exposed on the surface of the water. That is, when the number of detection outputs of the water detection sensor is 1, it is determined as an abnormal state (drought), and control is performed to stop energization of the electric heater 50.
The number of water detection sensors installed in the hot water storage tank 30 is not limited to the above number, and may be determined according to the capacity of the tank and the intended use, and the number of detection outputs of the determination method may be selected appropriately. That's fine.

  As described above, according to the second embodiment, a point is symmetrical with respect to each point on a horizontal cross section including each point of a plurality of points located at predetermined intervals on a vertical line passing vertically through the center of the hot water storage tank. A water detection sensor is provided inside each of the pair of side surfaces of the hot water storage tank, and the state of the amount of water in the hot water storage tank is determined based on the number of detection outputs of the water detection sensor. When it is determined that the water is full even in the case of tilting, the hot water supply from the water heating mechanism is restricted and the electric heater for heat insulation provided at the bottom is exposed on the water surface. Can stop energization of the electric heater and prevent disconnection of the heater.

  DESCRIPTION OF SYMBOLS 10 Hot water tank (hot water heating mechanism), 15 Hot water pipe, 30 Hot water storage tank, 31 Side surface, 32 Upper surface, 33 Bottom surface, 34 Center recessed part, 40 Ventilation pipe, 41, 42 Open end, 43 Middle part, 50 Electric heater, 60 Water level sensor, a1, a2, b1, b2, c1, c2 Water detection sensor.

Claims (5)

  In the hot water storage tank for storing hot water fed from the hot water discharge pipe of the hot water heating mechanism, one open end is provided at a predetermined position in the upper part of the hot water storage tank, and an intermediate portion is included in or outside the hot water storage tank and includes one open end. It was provided with a ventilation pipe that circulated on a substantially flat surface at the top of the hot water storage tank, hung down toward the bottom surface of the hot water storage tank, and had the other open end exposed to the outside from the bottom surface of the hot water storage tank. A hot water storage tank.   The hot water storage tank according to claim 1, wherein the hot water storage tank has a hollow portion on a bottom surface thereof, and an electric heater for keeping the stored hot water is provided in the hollow portion.   The hot water storage tank according to claim 1 or 2, wherein the shape of the hot water storage tank is a rectangular parallelepiped.   A water level sensor provided in the vicinity of one open end of the ventilation pipe is provided, and when the water level sensor detects the water level, water injection from the hot water boiling mechanism is stopped by the detection output. The hot water storage tank according to any one of claims 1 to 3.   A water detection sensor is provided on each of a pair of side surfaces of the hot water tank that is symmetrical with respect to each point on a horizontal cross section including each of a plurality of points located at predetermined intervals on a vertical line that passes vertically through the center of the hot water tank. The hot water storage tank according to any one of claims 1 to 4, wherein the hot water storage tank is provided and the state of the amount of water in the hot water storage tank is determined based on the number of detection outputs of the water detection sensor.

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