JPS6144245A - Hot water supply device - Google Patents

Abstract

PURPOSE:To unnecessitate power source equipment, to reduce the power consumption and to improve the hot water supply efficiency by driving a pump device and the like by an electromotive force of a thermal power generating element mounted on a hollow cylinder heater by the flame of a burner. CONSTITUTION:The contact surface on the inner peripheral surface side of a thermal power generating element 13 is heated to high temperatures by the flame of a burner 12 and an exhaust hot gas. On the other hand, the contact surface on the outer peripheral surface side of the thermal power generating element 13 makes face-contact with the inner wall 33a of an inner cylinder 33 of a first heat exchanger 1. The heat of the thermal power generating element 13 is dissipated in water within a flowpath 31, and the temperature of the element 13 becomes relatively low. As a result, a large temperature difference is produced between the contact surfaces of the element 13, and this makes it possible to generate a large electromotive power. By this power, a coil 29 is actuated, and rotary vane 22 rotates. Water within a bathtub 2 is sucked up into the vane 22 from a feed water tube 3 and is heated within a first heat exchange 1, and further the temperature of water is raised in a second heat exchanger 7, and hot water is supplied through a supply hot water tube 9.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a water heater that uses thermionic power generation.

Background Art In conventional convection bathtubs, the upper and lower parts of the bathtub are connected to a heat exchanger installed on the side of the bathtub, and the hot water heated in this heat exchanger is passed through two hot water pipes. The water in the lower part of the bathtub flows through the lower water supply pipe into the heat exchanger, thus creating convection and heating the water in the bathtub. It is desired that such conventional convection bathtubs heat water more efficiently.

Purpose An object of the present invention is to provide a water heater that can heat bath water etc. with high efficiency. a hollow cylindrical body, a thermoelectric generating element attached to the cylindrical body, and a pump V that causes water to flow through the cylindrical body using the power generating element.
This is a hot water supply device characterized in that it includes a device.

Function According to the present invention, since the pump device etc. can be driven by the electromotive force of the thermoelectric generating element, power supply equipment is not required, and moreover, it is possible to achieve improvement in hot water supply efficiency while reducing power consumption. It becomes possible.

Example tltJ1 Figure is a sectional view of one embodiment of the present invention, and the second embodiment
The figure is a perspective view showing a partially cutaway cross section of the cylinder 1.
Figure 3 is an enlarged cross-sectional view of section (2) in Figure tA2. The water to be heated in the bathtub 2 is transferred from the water supply pipe 3 to the water heater 4.
The hot water reaches the first heat exchanger 1 through the pump device 6 in the housing 5, is heated to a temperature of 2, is further heated in the combustion pipe 7, and is supplied from the hot water supply pipe 9 into the bathtub 2 via the valve 40. be done. The first heat exchanger 1 includes an inner cylinder 33 and an outer cylinder 32 coaxial therewith, and has a heating space 31 into which water to be heated is supplied. On the other hand, fuel gas is pipe 1
0 to the burner 2 via the solenoid valve 11. The flame of the burner 2 heats the thermoelectric generating element 13 attached to the first heat exchanger 1, and thus the thermoelectric generating element 1
3, a thermoelectromotive force is generated.

The pump device 6 is driven by this thermoelectric generator J as described later, and furthermore, the hot water supply device 4 is automatically controlled.

The water supply pipe 3 connected to the lower part 2a of the bathtub 2 has one end 3a.
is placed facing into the bathtub [2], and the water in the bathtub 2 is led to a hot water supply device 4 through a water supply pipe 3 via a filter 14 for removing dust and the like. The other end 3b of the water supply pipe 3 is arranged inside the housing 5! 1 is connected to a pump device 6 which is connected to the

The pump device 6 includes a cylindrical casing 15 and an actuating body 16 disposed within the casing 15. The casing 15 is made of a synthetic resin material, and has a right cylindrical portion 17 and a right cylindrical portion 17 connected to both ends thereof in the tube axis direction ( The conical portion 21 has a smaller diameter in the left-right direction in Fig. 1) and its circle! The straight pipe part 18, which is connected to the part 21 and connected to the connecting part 3b of the water supply pipe 3 and the connecting part 34 of the first heat exchanger 1, has a common axis in a straight line. A rotating body 16 having a rotational axis coaxial with the axis of the casing 15 is arranged in the hollow part 20 of the casing 15! be done. The rotating body 16 is connected to the first heat exchanger 1 from the bathtub 2.
A valve body 27 disposed on the second side (left side in FIG. 1) in the direction of arrow A, an impeller 22 connected to the valve body 27, and a valve body 27 and an impeller 22 coaxially arranged. Fixed rotating shaft 23
including. This rotating shaft 23 has a bearing 24 on the upstream side of arrow A.
and rotatably supported by bearings 25 on the downstream side, these bearings 24, 25
allows displacement of the rotating shaft 23 in the axial force direction. Rotating axis 2
A stopper 26 is interposed between the downstream side in the direction of arrow A of 3 and the bearing 25, and the action of this stopper 26 prevents the rotating shaft 23 from moving toward the downstream side.

The impeller 22 is made of a conductive material such as aluminum or iron, and works in conjunction with the fill 29 as a single-phase cage induction motor. The coil 29 is wound around the casing 15 and concentrically with the impeller 22, and is held by an iron core 29al:J. As the impeller 22 rotates in cooperation with the coil 29, water in the bathtub 2 is sent from the water supply pipe 3 through the hollow 20 and into the first heat exchanger 1 via the connecting pipe 4.

On the tip side of the impeller 22, a conical valve body 27 is connected to the blade 1.
A valve seat 28, which is mounted coaxially with the valve body 22 and can come into contact with the valve body 27, is attached to the conical surface 21 of the casing 15 on the "2" side in the water supply direction A. During suction from the bathtub 2, the rotating shaft 23 is displaced downstream in the direction of arrow A4, and the valve body 27 is separated from the valve seat 28.
Allow water flow. Therefore, as the impeller 22 rotates, water in the bath M2 is drawn into the first heat exchanger 1 through the water supply pipe 3 and the casing 15.

The first heat exchanger 1fll is connected to the inner cylinder 3 as shown in FIG.
3 and an outer cylinder 32, and a cylindrical flow path 31 is formed between the outer cylinder 32 and the inner cylinder 33. A water supply port 34 is formed at the lower end of the outer cylinder 32 and is connected to the other end of the casing 15 (right side in FIG. 1) and communicates with the flow path 3. A hot water supply port 35 that communicates with the flow path 31 and a second heat exchanger 7, which will be described later, is formed at the end. A burner 12 facing the hollow 36 of the inner cylinder 33 of the first heat exchanger 1 is arranged, and the burner 12 heats the water supplied into the flow path 31 from the water supply port 34, causing a temperature rise. The heated water is led out from the drain port 35 to the second heat exchanger 7. A cylindrical thermoelectric generating element 13 is attached to the inner wall 33a of the inner cylinder 33 coaxially with the inner cylinder 33. This thermoelectric generating element 13 has two contact surfaces 13a and 131.
This utilizes the so-called Seebeck effect, which generates a thermoelectromotive force due to a temperature difference between + and (see Fig. 4). That is, the contact surface 13a on the inner peripheral surface side of the thermoelectric power cord 13 is heated to a high temperature by the flame of the burner 12 and the exhaust heat,
On the other hand, the contact riri 13 on the outer peripheral surface side of the thermoelectric power cord 13
11 is in surface contact with the inner wall 33a of the inner cylinder 33 of the first heat exchanger 1, and the heat of this thermoelectric generating element 13 is dissipated into the water in the flow path 31, resulting in a relatively low temperature.

Therefore, a large temperature difference occurs between the contact surfaces 13a and 13b of the thermoelectric power cord 13, and thereby a large thermoelectromotive force can be generated. The filter 29 is energized by this electric power, and the impeller 22 is rotated.

The hot water whose temperature has been reduced in the first heat exchanger 1 is led to the second heat exchanger 7 from the hot water supply port 35. Second heat exchanger 7
includes a heat exchanger tube 39 and fins 42 formed on the outer periphery of the heat exchanger tube 39. The second heat exchanger 7 is disposed directly opposite the heat exchanger 11 and is bent, for example, in a U-shape in a vertical plane. One end 38 of the heat exchanger tube 39 is connected to the hot water supply [135] of the first heat exchanger 1, and the other end 141 is connected to one end 19 of the hot water supply pipe 9 through a solenoid valve 40 on the outside of the housing 5. be done. The hot water from the first heat exchanger 1 is guided to the heat transfer tube 39 of the second heat exchanger 7, and combined with the heat transfer effect of the fins 42, hot water is supplied into the bathtub 2 via the hot water supply pipe 9. The exhaust gas from the burner 12 heats the combustion pipe 7 to form two parts, and is discharged from an exhaust pipe 43 formed in the second part of the housing 5. Further, a temperature detector 44 is provided between the combustion section 39 of the combustion tube 7 and the connecting section 41, and the temperature of the hot water is detected by this temperature detector 44 as described later.

FIG. 4 is a block diagram showing the electrical configuration of the embodiment of FIG. 1. The contact surfaces 13a and 13b of the thermoelectric generating element 13 are as follows:
The charging circuit 45 is connected to the charging circuit 45 through lines 3, !, +91, , +22, respectively. 4 to the AC generating circuit 3o.

Also, Line No. 3. ! 4 is the branch line, / 5 , /
6 to the battery 37, and the branch line! 7
l-7=! 8 to a control circuit 46 realized by a microcomputer or the like. The control circuit 46 is connected to the line J! In response to the output from temperature sensor 44 connected via line f210, solenoid valve 11 is activated, connected via line f210. Line again! 11 is activated to control automatic ignition of the burner 13.

Referring again to FIG. 1, to supply hot water to the bathtub 2, the solenoid valve 11 is opened via the control circuit 46, and the ignition section 47 is activated to ignite the burner 12. On the other hand, the electric power from the battery 37 is converted into AC power by the AC generating circuit 30 and applied to the coil 29 . As a result, the impeller 22 is driven to rotate, and water in the bathtub 2 is sucked into the impeller 22 from the water supply pipe 3 and sent into the first heat exchanger 1. At this time, water flows in the direction of arrow A due to heat transfer convection within the bathtub 2, so the valve body 27 of the rotating shaft 23 is displaced in the direction of moving away from the valve seat 28, that is, in the direction of arrow A, allowing the flow of water. . The temperature of the hot water heated in the first heat exchanger 1 is further increased in the second heat exchanger 7, and the hot water is heated in the hot water pipe 9.
From m4'! Hot water is supplied within 2 hours. The temperature of this hot water is
The temperature is detected by the temperature detector 44, and its output is given to the control circuit 46, which operates the electromagnetic valve 11 that controls the flow rate of fuel to control the amount of heat generated by the burner 12.

When the bath water in bathtub 2 rises to a predetermined temperature,
The rotation of the blade [11122 is stopped via the control circuit 46.

At this time, the water on the downstream side in the direction of arrow A than the vane m and [1122 flows backward, displacing the impeller 22 upstream in the direction of arrow A, and causing the valve body 27 to sit on the valve seat 28. This prevents the temperature inside the bathtub 2 from decreasing after it boils due to the backflow of water.

According to experiments conducted by the inventor of the present invention, the following advantages can be obtained.

(1) Bath'W! 2. After boiling the bath water, the valve body 27
By seating the valve seat 28 on the valve seat 28 and closing the water supply pipe 3, backflow of water from the first heat exchanger 1 is prevented, thereby making it possible to lower the temperature of the bath water in the bathtub 2. This makes it possible to prevent

(2) When alternating current power is applied to the fill 29, the impeller 22 is rotated by magnetic force to supply water. According to , the suction speed is 0,
1 m/sec, whereas the hot water heater 4 of the present invention using thermionic power generation has a suction speed of 1 m/sec, which is about 10 times faster and lighter. Therefore, the flow velocity in the bathtub is high, and the forced convection heat transfer without boiling occurs, so that no scale adheres to the heat transfer surface.

(3) The temperature of the inner wall of the first heat exchanger 1 decreases due to thermionic power generation, but according to the inventor's experiments, the change in heat exchange is only about a few percent, and the time it takes to boil the bath decreases. Conventionally, the boiling time was 20 minutes in Sumire, 30 minutes in spring and autumn, and 40 minutes in winter, but even considering the overall increase in the heat transfer coefficient and the decrease in the pipe inner wall temperature, the boiling time in this water heater is as follows. ” 2 is 9
The time was reduced by about 10%. Furthermore, there is no need to stir the bath water during hot water supply, and a comfortable hot water supply effect can be achieved.

(4) Since the electromotive force is generated using thermionic power generation, no electrical wiring is required, and furthermore, the temperature detection of hot water supply by the control circuit 46 and the automatic ignition of the burner are automatically controlled using the battery 37. It is extremely practical.

In the above-mentioned embodiment, the pump device 6 is arranged at the opening between the water supply pipe 3 and the first heat exchanger 1, but it may be arranged at the opening between the first heat exchanger 1 and the second heat exchanger 7, for example. You can also do this. Alternatively, the thermoelectric power generation element 13 may be attached to the outer peripheral side of the first heat exchanger 1, and the structure may be such that power is generated based on the temperature difference between the contact surfaces 13a and 13b.

The water heater according to the present invention is not limited to bathtubs, but can be applied to boilers and other wide range of technical fields.

Effects As described above, according to the present invention, there is provided a burner that burns fuel, a hollow cylinder that surrounds the flame of the burner and is to be heated, a thermoelectric power generation element attached to the cylinder, and a thermoelectric power generation element that is attached to the cylinder. By installing a pump device, etc. that circulates water through the cylindrical body using an element, it is possible to reduce power consumption, and
Since no power supply equipment is required, the hot water supply equipment can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a perspective view showing a partially cutaway cross section of the first heat exchanger 1, and the third panel is an enlarged sectional view of section 2 in FIG. Figure 4 shows the thermoelectric power generation element 13.
FIG.

Claims (1)

[Scope of Claims] A burner that burns fuel; a hollow cylindrical body that surrounds the flame of the burner and is to be heated; a thermoelectric generating element attached to the cylindrical body; A water heating device comprising: a pump device that allows water to flow through the body.