JP3035824B2 - Single-tank electrothermal constant-temperature water supply device that does not immediately mix cold water injected with hot water while using hot water - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a constant temperature water supply device for a water heater for preventing cold water and hot water injected during use of hot water from mixing with each other immediately.
The present invention relates to a water supply device suitable for a regenerative hot water tank, an electric water heater, and a drinking machine provided in a flush toilet. During the use of hot water, cold water is first injected into the sealed telescopic means in the hot water tank, and as cold water increases and hot water decreases,
The expansion / contraction means moves downward. Once the use of hot water is stopped, the control circuit opens the cold water discharge pipe. The cold water contained in the sealing device flows out of the discharge pipe under the action of external force and flows into the hot water tank, so that the cold water supplied during use of the hot water does not immediately mix with the hot water. ing.

[0002]

2. Description of the Related Art A conventional water heater for heating cold water using electric heat, for example, a regenerative hot water tank provided in a flush toilet, discharges the hot water and turns the cold water into hot water. A chilled water supply device is used to replenish the tank.

As the amount of cold water increases and the amount of warm water decreases with the continuous use time, the water after mixing becomes colder. In order to solve this problem, the current and voltage are increased to perform instantaneous heating, but the specially high voltage and current are used, so the equipment is complicated, construction is difficult, the cost for upgrading the equipment is high, and the equipment is damaged. Disadvantages such as high rates and lack of safety due to current overload are evident. In addition, in the drinking machine, cold water and hot water can be used separately, but a separate cold water tank and hot water tank are required. As a result, the volume of the body increases and occupies a larger space, and over a long period of time. It has the drawback that if it is not added with water, it will be baked.

[0004]

SUMMARY OF THE INVENTION In view of the fact that the conventional electrothermal chilled water supply system is not ideal and not practical, the present invention has been made as a result of intensive studies and finally a new design which has not been used in the public. The present invention has been completed and provides a single-tank type hot water supply apparatus in which cold water replenished during use with hot water does not immediately mix with hot water. That is, in the present invention, the sealing device is spaced above the inside of the single tank hot water container,
Cold water is injected into the sealing device while hot water is being used, and at the same time, the control circuit closes the solenoid valve in the discharge pipe. By opening the solenoid valve inside, the external force acting on the cold water already stored in the sealing device is reduced, and the cold water is injected into the hot water tank through the discharge pipe communicating with the sealing device. I have. After the volume of the sealing device is completely contracted, that is, after the cold water in the telescopic container is completely pushed into the hot water tank, the injection of water is stopped, and the injected cold water is heated again by the heater to determine the hot water in advance. Maintain within the specified temperature range.
In this way, when using hot water, the cold water is not immediately mixed with the hot water, but is injected again when not using the hot water and heated to a predetermined temperature to prepare for the next use. The present invention has been completed based on this concept.

Accordingly, the present invention provides a single tank water heater constant temperature water supply device in which cold water additionally injected during hot water use does not immediately mix with hot water, which is located above the inside of a single hot water tank. A sealing device for temporarily storing cold water with expansion / contraction or expansion / contraction functions is installed. During the use of hot water, cold water is first injected into the sealing device above the tank by the control circuit. The cold water in the telescopic container is sent into the hot water tank, thus keeping the hot water in the hot water tank at a constant water level. According to the present invention, it is not necessary to additionally provide a single storage tank of a cold water tank and a hot water tank in addition to the hot water tank, so that the space volume of the hot water tank and the like can be saved, and a fire caused by burning due to no long-term addition of cold water. Can be prevented from occurring.

Further, according to the present invention, the container is a shrinkable container in which cold water additionally injected during use of hot water does not mix with hot water, and is generally a bellows tube formed of a synthetic resin.
Further, a buoyant disk-shaped member can be continuously provided at the bottom of the bellows tube, and is made of a material such as a hydrophobic sponge or expanded polystyrene. Further, the telescopic container can be a bag-like body, for example, a rubber elastic bag having an inflating and contracting action. Thus, the cold water container can freely expand and contract with the injection or discharge of water.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the accompanying drawings. Embodiment 1 First, referring to FIG. 1, 1 is a hot water tank,
2 is a cold water injection pipe, 3 is a cold water discharge pipe, 4 is a hot water discharge pipe, 5
Is an electric heater, 6 is a thermostat, and 7 is a power supply unit. As shown in the figure, a solenoid 21 provided on the cold water injection pipe 2 is connected to an electromagnetic valve 31 of the cold water discharge pipe 3, and is connected to an electric heater 5 attached to the bottom of the hot water tank 1.
, The thermostat 6 and the power supply unit 7 constitute a control circuit. In the present invention, a single hot water tank 1 is provided, and a cold water telescopic container 1 having a bellows-shaped shrinking device which can store cold water for a while above the inside of the hot water tank 1 is provided.
1 to form a sealing device and use hot water, when the level of hot water in the hot water tank 1 drops, cold water from the tap water first flows into the telescopic container 11 in the hot water tank 1, and the cold water and hot water Are not mixed with each other immediately, and the hot water in the hot water area 8 is discharged while maintaining a constant temperature. When cold water is supplied to the telescopic container 11, the water flow activates the solenoid 21, and the control circuit closes the solenoid valve 31 and closes the cold water discharge pipe 3. The space emptied due to the decrease in hot water in the hot water tank 1 and the drop in water level
It is always occupied by the cold water telescopic container 11 descending by gravity. Thus, a portion of the hot water in the hot water tank 1 is discharged for use, but the telescopic container 11 descends toward the remaining hot water, and the hot water always surrounds the cold water telescopic container 11. When the use of hot water is stopped, the telescopic container 11
Is pressurized by the remaining hot water due to the buoyancy of the hot water in the hot water tank, and as a result, the solenoid valve 31 is opened,
Cold water can flow from the cold water discharge pipe 3 into the hot water tank 1 as supplementary water. This achieves the object that cold water and hot water do not mix with each other when using hot water. Therefore,
In the water supply device of the single-tank water heater of the present invention, the control circuit having the solenoid 21 and the solenoid valve 31 causes
That is, while the hot water flows out of the hot water discharge pipe 4, the cold water supplied from the tap water is injected into the telescopic container 11 inside the hot water tank 1 through the water injection pipe 2. At the same time as the cold water is supplied through the water injection pipe 2, the solenoid 21 is turned on, and the solenoid valve 31 is operated to close the cold water discharge pipe 3. As the level of the hot water drops, the cold water injected into the telescoping vessel 11 increases and extends toward the bottom of the tank. When the use of the hot water is stopped, the cold water injection pipe 2 stops the water injection, the water flow is stopped, the solenoid 21 is turned off, and the solenoid valve 3 in the cold water discharge pipe 3 is stopped.
Open the middle. The buoyancy of the remaining hot water in the hot water area 8 and around the telescopic container 11 and the recovery force of the telescopic container are
And the telescopic container 11 floats and contracts. Next, the cold water flows from the telescopic container 11 through the cold water discharge pipe 3 into the hot water area 8 from the lower left side of the hot water tank 1. Then, warm water area 8
The cold water is completely injected into the warm water area 8 until the water level of the water rises and fills the space left by the rising telescopic vessel 11. Next, the floating plate 12 provided at the bottom of the telescopic container reaches the top of the tank and automatically stops water injection. The temperature reduced by the cold water injected into the hot water area is detected by the thermostat 6, so that the electric heater 5 is turned on and heats the water to a predetermined temperature sufficient for the next use.

(Embodiment 2) FIG. 2 shows a second embodiment of a water supply apparatus in which cold water and hot water are not immediately mixed with each other.
This configuration allows the cold water temporarily stored in the telescoping vessel 11 to be pre-heated before discharging to the hot water area 8. If the water heater is used for showering, the water that is replenished to the hot water area 8 in the same manner as in FIG. 1 while the use of the hot water is stopped is also hot water, and is newly added when reused. It is not necessary to heat the remaining hot water mixed with water for a while. 1 and 2, the same members are denoted by the same reference numerals. The difference between the structure shown in FIG. 2 and the structure shown in FIG. 1 is that the control circuit further has another electric heater 5 ′ provided in the telescopic container 11, and that the electromagnetic valve 31 ′
Is mounted directly inside the floating base 12. As shown in FIG. 1, while the hot water in the hot water area 8 is discharged from the hot water discharge pipe 4 and provided for use, the hot water level in the hot water area 8 drops due to outflow, and the telescopic container 11 also And the cold water also flows into the telescopic container 11 through the cold water injection pipe 2 at the same time. At this time, the thermostat 6a detects the temperature of the cold water and supplies an electric current to the electric heater 5 'to heat the cold water in the telescopic container 11. After waiting for the water temperature to rise to the set temperature, the thermostat 6a turns off the electric heater 5 ', and simultaneously activates and opens the solenoid valve 31. The buoyancy of the warm water in the hot water area 8 and the restoring force of the telescopic container act on the telescopic container 11 and the floating plate 12 to press and contract the telescopic container 11, and the already heated cold water in the telescopic container 11 is discharged by the electromagnetic valve 31. And flows into the hot water area 8 to be replenished. Since the temperature of the supplied water is the same as the temperature in the hot water area 8, the time during which the water is heated can be reduced. Such a device for preheating cold water in the telescopic container 11 is particularly suitable for being applied to an electrically heated drinking device which easily guarantees the use of hot water at all times.

(Embodiment 3) FIG. 3 shows a third embodiment of the water supply apparatus of the present invention in which cold water and hot water do not mix with each other immediately. The difference between the structure shown in FIG. 3 and the structure shown in FIG. 1 is that a tension spring 102 is provided between the bottom of the hot water tank 1 and the bottom of the telescopic container 11. An equivalent utility is achieved in place of the buoyancy action of the floating base 12 at the bottom of the base 11.

(Embodiment 4) FIG. 4 shows a fourth embodiment of the water supply apparatus of the present invention in which cold water and hot water do not mix with each other immediately. The difference between the structure shown in FIG. 4 and the structure shown in FIG.
The coil spring 102 is attached between the bottom of the telescopic container 11 and the top of the hot water tank 1. The inner ring of the spring 102 is fixed to the top of the hot water tank 1, and the outer ring is the bottom of the telescopic container 11. Is attached to the inner end face of the floating base 12a, and the elastic recovery characteristic of the spring 102 enhances the buoyancy instead of the floating base 12 at the bottom of the telescopic container 11, thereby achieving the same effect.

(Embodiment 5) FIG. 5 shows a fifth embodiment of the water supply apparatus of the present invention in which cold water and hot water do not mix immediately. The difference from FIG. 1 is that the silica gel bag 11a replaces the telescopic container 11 of FIG. 1, the hot water tank 1 has a gap separated by the inner wall 101a and the outer wall 101b, and the opening end of the silica gel bag 11a and this gap Spiral spring 1 surrounding the inside
02 are connected together. Further, the rest of the coil spring 102 is fixed to the bottom of the gap, and the silica gel bag 11a is constantly pulled into the gap by the coil spring 102. Similarly to the above, after the hot water in the hot water area 8 is discharged from the hot water discharge pipe 4, the cold water is injected into the silk gel bag 11 a from the cold water injection pipe 2. On the contrary, it falls as the warm water level falls. When the hot water stops flowing, the silica gel bag 11a is lifted upward due to the buoyancy of the hot water in the hot water area 8 and the recovery force of the spring 102, and at the same time, the silica gel bag 11
The cold water stored in a is pressed to flow from the cold water discharge pipe 3 into the hot water area 8.

(Embodiment 6) FIG. 6 shows a water supply apparatus according to a sixth embodiment of the present invention. A small motor 13 is provided, and is connected to the floating base 12 at the bottom of the telescopic container 11 by a thin wire 14 such as a nylon wire. When the warm water in the warm water area 8 flows out of the warm water discharge pipe 4, when the level of the warm water falls and cold water is injected from the cold water injection pipe 2 into the telescopic container 11, the cold water flowing in the pipe moves the solenoid 21 to float. The electromagnetic valve 31 "attached to the panel 12 is closed.
Until the outflow from the motor stops, the solenoid 21
3 to turn on the electromagnetic valve 31 ″ again. The combined force of the buoyancy of the warm water in the hot water area 8 and the power of the motor 13 that lifts the floating board 12 is combined with the electromagnetic valve 3 that opens the cold water in the telescopic container 11.
1 ”, flows into the warm water area 8 and mixes with the remaining warm water, and is heated to a predetermined temperature by the electric heater 5. After the motor 13 raises the telescopic container 11 to a predetermined height, the motor 13
Can be stopped, for example, by a microswitch which is conventionally used and thus does not require further elaboration.

(Embodiment 7) FIG. 7 shows a seventh embodiment of the water supply apparatus according to the present invention.
Is located within. The silica gel disk 11b has a disk shape, a diameter slightly smaller than the inner diameter of the hot water tank 1, and forms a flange 101b around the circumference.
Usually, the diameter of the open end of the flange 101b is slightly smaller than that of the bottom. As shown in FIG. 7, when hot water is discharged from the hot water discharge pipe 4, cold water also flows into the sealed space separated by the silica gel board 11b due to the descending of the silica gel board 11b. The open end of the flange 1101b of the silica gel board 11b opens outward, is densely formed on the inner wall of the hot water tank 1, and decreases along with the inner wall of the silica gel board due to the weight of the cold water as the water level of the hot water area decreases.
Since the static pressure of the cold water causes the flange 1101b to abut the inner wall of the hot water tank, it is possible to prevent the cold water from flowing into the hot water section 8 located below during the descent of the silica gel board 11b and mixing with each other. After the stoppage of the use of the hot water, the buoyancy of the hot water in the hot water area acts on the silica gel plate 11b to raise the silica gel plate, and the rising force presses the cold water inside the silica gel plate 11b. The force acting on the outer surface of the flange due to the pressure of the cold water pressed on the inner wall and the restoring force of the flange 1101b are larger than the force acting on the inner surface of the flange due to the pressure of the cold water.
As shown by the phantom line in FIG. 7, the cold water in the upper part is discharged from between the flange and the inner wall, flows into the lower hot water area 8 to replenish the amount of hot water, and the thermostat 6 operates the electric heater 5 to maintain the room temperature. Heat until ready for use.

As described above, the volume of the sealed space is reduced by using the position change or expansion / contraction change of the telescopic container, the silica gel bag, the motor and the silica gel board used in the present invention, and the temporarily stored cold water is reduced. Since the water is pressed while not using the hot water and flows into the hot water area, it is possible to avoid a defect in which the cold water and the hot water always mix during the use of the hot water and the water temperature suddenly drops. Such a water supply device can be widely applied to water heater devices for various uses, and has an extremely large industrial utility value. Defect

[0015]

[Brief description of the drawings]

FIG. 1 is an explanatory view of a first embodiment of a water supply device for a single-tank type water heater according to the present invention.

FIG. 2 is an explanatory view of a second embodiment of the water supply device of the present invention.

FIG. 3 is an explanatory view of a third embodiment of the water supply device of the present invention.

FIG. 4 is an explanatory view of a fourth embodiment of the water supply device of the present invention.

FIG. 5 is an explanatory view of a fifth embodiment of the water supply device of the present invention.

FIG. 6 is an explanatory view of a sixth embodiment of the water supply device of the present invention.

FIG. 7 is an explanatory view of a seventh embodiment of the water supply device of the present invention.

[Explanation of symbols]

1 hot water tank, 2 cold water injection pipe, 3
Cold water discharge pipe, 4 hot water discharge pipe, 5 electric heater, 6,
6a temperature sensor, 7 power supply section, 8 hot water area, 11
Telescopic container, 11a silica gel bag, 11b silk gel board, 1
2, 12a Floating plate, 13 motor, 21 solenoid, 31
Solenoid valves, 101a, 101b inner and outer walls, 102 spring.

Claims (12)

(57) [Claims] And 1. A heating means sealed single tank type hot water storage means is provided inside, attached to the inside top of the hot water storage unit, the cold water supplied through the stored temporarily and tube A sealing device for temporarily storing cold water so that it is not immediately mixed with hot water, and a means for changing the position and size of the sealing device is provided, and when the supply of cold water is stopped, or Wherein, after the cold water is heated to a predetermined temperature, the cold water is discharged to a single tank type hot water storage means so as to be heated to the predetermined temperature. A single-tank electrothermal constant-temperature water supply device that does not immediately mix injected cold water with water. 2. The water supply device according to claim 1, wherein the sealing device is a telescopic container, an elastic bellows tube made of rubber or an emulsion, and having a bottom. 3. The expansion / contraction means used in the expansion / contraction container for cold water is a bellows-shaped member, and the distal end of the expansion / contraction container is connected to a cold water injection pipe and a cold water discharge pipe. Item 3. A single-tank type water heater water supply device according to item 2. 4. A solenoid provided in a conduit for injecting cold water into the telescopic container, a solenoid valve provided in another conduit for discharging cold water from the telescopic container to the hot water storage device, and a solenoid provided in the bottom of the hot water storage means. and are electromagnetic devices, and support Mosutatto, power supply and comprising a control circuit provided et al is from while the hot water is discharged from the hot water storage unit, the cold water stretchable container to fill the space emptied by the discharge of hot water Under the pressure of cold water, the solenoid is turned on and the solenoid valve is actuated to the closed position,
When the cold water does not flow from the telescopic container into the hot water storage means, the cold water and the hot water do not mix with each other, and when the use of the hot water is stopped, the solenoid is turned off and the supply of the cold water is opened so that the solenoid valve is opened. Stopping, whereby the cold water previously stored in the telescoping vessel starts flowing to the hot water storage means, and the thermostat activates the electric heater by the temperature difference to heat the hot water area. The water supply device according to claim 3, wherein 5. The single-tank hot water according to claim 4, wherein a solenoid solenoid valve is directly attached to the bottom of the sealed telescopic container, and the opening / closing position of the solenoid valve is controlled by the solenoid. Water supply device. 6. The single tank type hot water supply device according to claim 2, wherein a floating plate is attached to a bottom portion of the telescopic container. 7. The single tank hot water supply device according to claim 2, wherein a tension spring is provided between a lower portion of the telescopic container and a bottom of the hot water storage tank. 8. A coil spring is provided in the telescopic container, an inner ring of the coil spring is mounted on an inner end of the hot water tank, and an outer ring is mounted on an inner end surface at the bottom of the telescopic container. The single-tank-type water heater water supply device according to claim 2 or 3. 9. The shrinking means used for the chilled water telescopic container is a bellows-shaped container, the expanding and contracting means as a closed container is connected to the cold water injection pipe at the tip, and the floating plate is provided for the shrinkable container. It is attached to the bottom, an electric heater is fixed to the floating board, a solenoid valve is mounted through the floating board, a temperature sensor is provided inside the shrinkable container, and another is provided at the bottom of the hot water tank. An electric heater and a thermostat are attached, cold water flows into the telescopic container as hot water is discharged from the hot water tank, and the thermostat in the telescopic container activates the electromagnetic valve on the floating plate to cool the telescopic container. Close the passage that flows into the hot water storage means from below, and the cold water in the telescopic container is heated by the heater, but if hot water is not used, the solenoid valve in the telescopic container opens, and the Was stored 3. The water supply according to claim 2, wherein the cold water is adapted to start flowing to the hot water storage means. 10. The hot water storage means has an inner wall and an outer wall provided by a gap, and at the bottom in the gap,
One end of the shrinking means acting by the elastic recovery force is fixed, a silica gel bag having an open end folded into the gap is provided, connected to the other end of the shrinking means, and the shrinking means is supplied after cold water is supplied. The water supply device according to claim 1, wherein the silica gel bag is configured to reduce its volume under the elastic recovery force of the water supply device. 11. A small motor is mounted outside the hot water storage means, the motor is connected to the bottom of the telescopic container with a nylon wire, and the telescopic container attracted by the motor is configured to be contracted. The water supply device according to claim 2, 12. A hot water storage means comprising a single tank type hot water storage means provided with a heating device therein, and a silica gel plate having a protruding edge provided at the top inside the hot water storage means. The warm water in the means acts on the silica gel board,
A water supply device, wherein cold water above a silica gel board is pressed, and cold water flows into the storage means between the silica gel board and the inner wall of the hot water storage device.