JP2001091061A - Solar water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar water heater, in which the forward end part of a hot-water collecting pipe is prevented from sinking due to floating of a float on the hot water surface in a hot-water storage tank and high temperature hot water, can be taken out and delivered at all times, from the upper layer of the hot-water storage tank. SOLUTION: This solar water heater, comprising a heat collector and a hot water storage tank coupled through hot water circulation piping, is provided with a delivery hot water pipe joint, having a hot water outlet mounted on one side face of the hot water storage tank while penetrating the side face, a hot-water collecting pipe fixed to the delivery hot-water pipe joint, a tubular hot-water guide pipe having a flexible part at least a part of the hot-water collecting pipe, a float fixed to the forward end part of the hot water guide pipe, and a float-retaining part formed on the upper wall of the hot-water storage tank facing the float floating horizontally in the hot water storage tank, while projecting inward of the tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar water heater for storing hot water using solar heat.

[0002]

2. Description of the Related Art Conventionally, a solar water heater supplies water to a hot water tank and circulates water (hot water) stored in the hot water tank to a heat collector for collecting solar heat. (Hot water) is heated, and the structure which takes out the hot water in the heated hot water storage tank is widely used.

[0003] As such a solar water heater, those disclosed in Japanese Utility Model Laid-Open No. Hei 6-22871 and Japanese Patent Laid-Open Publication No. Hei 10-170075 are known.

FIG. 4 is a sectional view of a hot water storage tank of a solar water heater described in Japanese Utility Model Laid-Open No. 6-22871. In FIG. 4, 101 is a hot water tank of a solar water heater for storing hot water heated by solar heat, 102 and 102 are feed pipes for supplying hot water from the hot water tank 101 to the heat collector, and 103 and 103 are inside the heat collector. A return pipe for returning the heated hot water to the hot water tank 101,
104 is an automatic water supply tank disposed on the side of the hot water storage tank 101, 105 is a lower part of the hot water storage tank 101 and the automatic water supply tank 10
4, a water supply passage communicating with the lower part of the tank 4, an air venting part 106 communicating with the upper part of the hot water storage tank 101 and the upper part of the automatic water supply tank 104, a water supply pipe 107 for supplying water to the automatic water supply tank 104, and a automatic water supply 108. A water supply pipe provided on one side of the tank 104 and provided with a ball tap valve;
8 is a float of the ball tap valve.

Since the hot water storage tank 101 and the automatic water supply tank 104 are communicated with each other by the water supply channel 105 and the air vent 106, the water level of the hot water storage tank 101 and the automatic water supply tank 104 are always the same. Automatic water supply tank 104 from water supply pipe 108
The water supplied into the hot water storage tank 101 passes through a water supply passage 105.
Water is poured at the bottom of the.

The water supplied from the water supply passage 105 into the hot water storage tank 101 stays at the bottom of the hot water storage tank 101 and becomes hot water having a low temperature. The low-temperature hot water staying in the lower layer of the hot water storage tank 101 is sent to the heat collector through the outgoing pipe 102, is heated by the solar heat in the heat collector, and is returned from the return pipe 103 to the hot water storage tank 1.
01 is returned. Since the heated hot water has a low specific gravity, it stays in the upper layer of the hot water storage tank 101.

[0007] The ball tap valve of the water supply pipe 108 is connected to the water supply pipe 1 so that the water level in the hot water storage tank 101 is always constant.
07 is controlled. Specifically, when the water level in the hot water storage tank 101 decreases, the float 109 floating on the water surface in the automatic water supply tank 104 lowers, and the ball tap valve of the water supply pipe 108 is opened to open the automatic water supply tank 10.
4 is supplied. Conversely, when the water level in the hot water storage tank 101 rises, the float 109 floating on the water surface in the automatic water supply tank 104 rises, the ball tap valve of the water supply pipe 108 is closed, and the water supply to the automatic water supply tank 104 is stopped.

Reference numeral 110 denotes a tapping pipe for tapping hot water stored in the hot water tank 101, 111 denotes a tapping pipe for tapping hot water stored in the hot water tank 101 and feeds the tap water to the tapping pipe 110, 112.
Is a float composed of a horizontally long hollow body disposed at the tip of the hot water pipe 111.

[0009] The hot water pipe 111 communicates with the base end 111a connected to the tapping pipe 110, the hot water pipe 111b communicating with the distal end of the base end 111a, and the hot water pipe 111b and the base end 111a. And a flexible portion 111c composed of a bellows.
A hot water outlet 111d is open at the end of the hot water pipe 111b, and a float 112 is moored to the hot water outlet 111d by a mooring portion 112a. Therefore, since the tip of hot water pipe 111b is always located immediately below the surface of the hot water stored in hot water storage tank 110, hot water with the highest temperature in the upper layer of the hot water stored in hot water storage tank 110 can be taken out and discharged. .

[0010]

However, the above-mentioned conventional solar water heater has the following problems. (1) When the water level of the hot water storage tank 101 does not reach the upper wall of the hot water storage tank 101, the float 112 rises to the surface of the water in the hot water storage tank 101, but the float 112 is a horizontally long hollow body, and a water sampling pipe is provided at one end thereof. Since the hot water pipe 111b is moored, the end of the float 112 on the side where the hot water pipe 111 is moored sinks, and the end of the float 112 on the opposite side floats above the water surface. .

FIG. 5 is a view showing a state in which the float has risen to the surface of the water in the hot water storage tank. In FIG. 5, 111 is a hot water pipe, 111a is a base end, 111b is a hot water pipe, 111c
Is a flexible portion, 111d is a hot water outlet, 112 is a float, 11
Reference numeral 2a denotes mooring portions, which are the same as those in FIG. Reference numeral 120 denotes a water surface in the hot water storage tank 101.

As shown in FIG. 5, since the end of the float 112 on the side where the hot water pipe 111 is moored sinks, the hot water outlet 111d must be located below the water surface 120 by the amount of the sink. Becomes In the hot water storage tank 101, the hot water heated by the heat collector stays in the upper portion of the hot water storage tank 101, so that the hot water supply port 111 d sinks as described above, so that the hot water supply pipe 111 There was a problem that the hot water having a high temperature in the upper layer could not be sufficiently taken out, and the thermal efficiency of the solar water heater was reduced.

The present invention solves the above-mentioned conventional problems, and prevents the tip of a hot water pipe from sinking due to floating of a float on the surface of hot water in a hot water storage tank, so that the upper layer of the hot water storage tank is always prevented. It is an object of the present invention to provide a solar water heater capable of taking out hot water having a high temperature and discharging hot water.

[0014]

In order to solve the above-mentioned problems, a solar water heater according to the present invention is a solar water heater in which a heat collector and a hot water tank are connected by piping for circulating hot water. A tapping pipe connection portion provided on one side surface and provided with a tapping hole penetrating the side surface, a tapping tube attached to the tapping tube connection portion, and a tubular body having a flexible portion in at least a part of the tapping tube A hot water pipe made of, and a float attached to the tip of the hot water pipe, and a float holding portion formed on the upper wall of the hot water tank opposite to the horizontally raised float of the hot water tank so as to protrude inside the tank, Is provided.

[0015] With this configuration, it is prevented that the float rises above the surface of the hot water in the hot water storage tank so that the tip of the hot water collection pipe sinks, and hot water with a high temperature in the upper layer of the hot water storage tank is always taken out and discharged. It is possible to provide a solar water heater that enables the above.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A solar water heater according to a first aspect of the present invention is a solar water heater in which a heat collector and a hot water storage tank are connected by piping for circulating hot water, and is arranged on one side of the hot water storage tank. A tapping pipe connecting portion provided with a tapping hole penetrating the side surface, a tapping pipe attached to the tapping pipe connection section, and a hot water guide comprising a tubular body having a flexible portion in at least a part of the tapping pipe. A pipe, a float attached to the tip of the hot water pipe, and a float holding portion formed on the upper wall of the hot water storage tank facing the float that floats horizontally and protruding toward the inside of the tank. Configuration.

With this configuration, the following operation is obtained. Even if the water level of the hot water in the hot water tank does not reach the upper wall of the hot water tank, the float floating on the water surface
The upper end portion is held down by the float holding portion, and the end of the float on the side where the tip of the hot water pipe is moored is prevented from sinking and the float is prevented from rising to the surface of the water. This makes it possible to always maintain the position of the tip of the hot water pipe near the surface of the hot water in the hot water tank, and it is possible to always take out hot water having a high temperature in the upper layer of the hot water tank.

Here, as the float holding portion, when the hot water storage tank is blow-molded, its portion may be depressed inward to be integrally molded. In the case of sheet molding (vacuum pressure chamber molding), another member may be used. And may be formed by bonding.

According to a second aspect of the present invention, there is provided the solar water heater according to the first aspect, wherein the hot water pipe is detachably attached to a hot water pipe connecting portion from outside the hot water storage tank. Things.

With this configuration, the following operation can be obtained. Since the hot water pipe is detachable from the hot water pipe connecting portion from the outside of the hot water storage tank, the hot water pipe can be easily replaced for maintenance or the like.

According to a third aspect of the present invention, there is provided the solar water heater according to the second aspect, wherein the float is formed in a horizontally elongated hollow body having a diameter shorter than the diameter of the tap hole. And a float mooring portion protruding from one end of the float main body and mooring the float main body to the tip end of the hot water pipe.

With this configuration, the following operation is obtained. Since the float is formed in a horizontally elongated hollow body having a diameter smaller than the inner diameter of the hot water pipe connection (that is, the diameter of the tap hole), the float can be detached from the hot water pipe connection from outside the hot water storage tank. This makes it possible to easily replace the tapping pipe in maintenance or the like.

The invention described in claim 4 is the invention according to claim 2 or 3
In the solar water heater according to the above, the hot water pipe connecting portion is provided with a hot water pipe connecting portion consisting of a tubular body disposed to communicate with the hot water outlet and protrude from the side surface of the hot water storage tank, A connection part comprising: a base part formed of a tubular body connected to the base end part of the hot water pipe and the tapping pipe connection part; and a connection water seal body formed of an elastic member fitted on the outer peripheral side of the base part. A water seal body, an inner cylinder portion formed in a cylindrical shape, an outer flange portion formed in a flange shape at one end of the inner cylinder portion, and an outer cylinder formed of a cylindrical body having one end connected to the outer flange portion And an outer tube portion and an inner tube portion are formed in a coaxial double tube, and a hot water connection portion can be inserted between the outer tube portion and the inner tube portion. Things.

With this configuration, the following operation can be obtained. (1) When the hot water pipe is attached to the hot water pipe connecting part, the float, the hot water pipe, the base, and the inner cylindrical part of the connection water sealing body are inserted from the outside of the hot water tank through the opening of the hot water pipe connecting part. I do. The end of the connection water sealing body is provided with an outer flange portion and an outer tube portion, and the outer tube portion and the inner tube portion are formed in a coaxial double tube. Therefore, when the inner cylindrical portion of the connection water sealing body is inserted into the hot water pipe connecting portion, the distal end portion of the hot water pipe connecting portion is fitted between the outer cylindrical portion and the inner cylindrical portion. Thereby, the hot water pipe is connected to the hot water pipe connecting portion. Further, since the connection water seal is made of an elastic member, the connection water seal simultaneously seals the hot water from leaking from the connection portion. (2) With a simple configuration, it becomes possible to detachably connect the hot water pipe to the hot water pipe connecting portion.

Here, in order to obtain even higher connection strength and sealing performance, after the connection water sealing body and the hot water pipe connection part are fitted, a clamp or the like is fastened from outside the outer cylinder of the connection water sealing body. It is preferable to fasten with a member.

An embodiment of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a cutaway perspective view of a main part of a solar water heater according to Embodiment 1 of the present invention, and FIG.
FIG. 4 is a cross-sectional view taken along line -A.

1 and 2, 1 is a solar water heater, 2 and 2 are heat collectors for heating hot water by solar heat, 3 is a hot water storage tank connected to the heat collector 2 by piping for circulating hot water, 3a Is a bottom surface in the tank of the hot water storage tank 3, 4 and 4 are outgoing pipes for sending hot water from the hot water storage tank 3 to the heat collectors 2 and 2, and 5 and 5 collect hot water heated in the heat collectors 2 and 2. It is a return pipe returning from the vessels 2 and 2 to the hot water storage tank 3. The hot water stored in the hot water storage tank 3 is sent from the outgoing pipes 4 and 4 to the heat collectors 2 and 2, and is heated by the solar heat in the heat collectors 2 and 2 and then returned to the return pipe 5.
5, the hot water is returned to the hot water storage tank 3, whereby the circulation and heating of the hot water are performed.

Numeral 6 denotes an eaves side where heat collectors 2 and 2 are connected by outgoing pipes 4 and 4 and return pipes 5 and 5, and 7 denotes a ridge side of hot water storage tank 3 facing eaves side 6. , 8 and 9 are the first and second lateral sides of the hot water tank 3 which are two opposing sides connected to the eaves side part 6 and the ridge side part 7, and 10 is above the hot water tank 3. The wall 10a is a float holding portion formed to protrude from the upper wall of the hot water tank, and 11 is a water supply pipe arranged on the ridge side portion 7 of the hot water tank 3.

The water fed into the hot water tank 3 from the water supply pipe 11 is injected into the hot water tank 3 along the bottom surface 3a of the hot water tank 3. The water injected into the hot water storage tank 3 has a high specific gravity, flows through the lower layer along the bottom surface 3a of the hot water storage tank 3, flows into the outflow pipes 4, 4, and is heated. Reference numeral 12 denotes a tapping pipe connecting portion provided on the first lateral side portion 8 of the hot water storage tank 3 and provided with a tapping hole 12a penetrating the first lateral side portion 8.

Reference numeral 13 denotes a hot water pipe attached to the hot water pipe connecting portion 12 so as to be detachable from the outside of the hot water storage tank 3, and 14 denotes a hot water pipe 1
3 is a hot water pipe made of a tubular body having a central portion and a flexible portion 15 formed of a flexible bellows at a base end;
4 is a hot water pipe opened on the peripheral wall of the tip end, 16 is a hot water pipe 1
4, a float 16a is moored to the distal end of the hot water pipe 14 and is formed in a horizontally elongated hollow body. 16b is a float main body protruding from one end of the float main body 16a. 16a is a float mooring portion for mooring the distal end of the hot water pipe 14, 17 is a base made of a cylindrical body connected to the base end of the hot water pipe 14, and 18 is a base 1
7 is a connection water sealing body made of an elastic member such as synthetic rubber fitted on the outer peripheral side of the connector 7. The float holding portion 10a is formed so as to protrude into the inside of the upper wall 10 of the hot water storage tank 3 facing the float 16. The float main body 16a is formed such that its diameter is shorter than the diameter of the tap hole 12a. Further, a tapping pipe 21 for tapping hot water in the hot water storage tank 3 from outside of the hot water storage tank 3 is connected to the base 17 of the hot water supply pipe 13.

FIG. 3 is a cross-sectional view of a main portion around a hot water pipe connecting portion of the solar water heater of FIG. In FIG. 3, reference numeral 8 denotes a first lateral side portion, 12 denotes a tapping pipe connection portion, 12 a denotes a taphole, 13 denotes a tapping pipe, 14 denotes a hot water pipe, 15 denotes a flexible section, 16 denotes a float,
16a is a float body, 16b is a float mooring unit, 17
Is a cap portion, and 18 is a connection water seal. These are the same as those in FIG.

Reference numeral 17a denotes a tapping pipe connecting flange formed in a flange shape at an end opposite to the end connected to the tapping pipe 14 of the base portion 17,
17b is an inner screw which is a connection mechanism of the tapping pipe 21 formed on the inner wall of the base of the base 17, 18a is an inner cylinder of the connection water sealing body 18 formed in a cylindrical shape, and 18b is at one end of the inner cylinder 18a. Outer flange portion of connection water sealing body 18 formed in a flange shape, 18c
Is an outer cylindrical portion of a connecting water sealing body 18 formed of a cylindrical body having one end connected to the outer flange portion 18b, and a tubular portion 19 communicates with the tap hole 12a and is provided so as to project from the first lateral side portion 8. It is a hot water pipe connection part consisting of a body.

The outer cylindrical portion 18c and the inner cylindrical portion 1 of the connection water sealing body 18
8a is formed in a coaxial double tubular shape.
The tip end of the hot water pipe connecting portion 19 is inserted inside c. The connection water sealing body 18 is a fastening member 2 composed of a clamp.
As a result, the connection water sealing body 18 is tightly fixed to the hot water pipe connecting portion 19 by being fastened from the outside of the outer cylindrical portion 18c.

The operation of the solar water heater of the first embodiment configured as described above will be described below.

The solar water heater 1 is installed on the southern slope of the roof (the slope facing the direction in which the sun orbits). When the solar water heater 1 is installed on the roof, the heat collectors 2 and 2 are placed on the eaves side with respect to the roof inclined downward from the ridge toward the eaves.
The hot water storage tank 3 is installed so as to be inclined toward the ridge (see FIG. 2). A water supply pipe 106 for sending water to the hot water tank 3 is connected to the supply pipe 13 of the hot water tank 3.

When water (hot water) is supplied from the water supply pipe 11 into the hot water storage tank 3 and the water (hot water) is stored in the hot water storage tank 3, the specific gravity of the hot water in the hot water storage tank 3 is smaller than that of the medium-cooled water. When the water level does not reach the upper wall of the hot water storage tank 3, the float 16 floating on the water surface is held by the float holding part 10 a at the tip, and the float mooring the tip of the distribution pipe 14 is moored. The portion 16b rises and the float 16 becomes parallel to the water surface (see FIG. 2). This makes it possible to always maintain the position of the tip of the hot water pipe 14 near the surface of the hot water on the upper surface side of the hot water storage tank 3, and always use the hot water pipe 13 to supply the high temperature hot water in the upper layer of the hot water storage tank 3. It is possible to take out and tap.

The hot water pipe 13 of the first embodiment is connected to the hot water pipe connecting section 19 of the hot water pipe connecting section 12 from outside the hot water storage tank 3.
It is configured to be removable. When the hot water pipe 13 is attached to the hot water pipe connecting portion 12, the float 16, the hot water pipe 14, the base 17 and the inner cylindrical portion 18a of the connection water sealing body 18 are inserted from the outside of the hot water tank 3 through the hot water outlet 12a. I do. Here, the float main body 16a of the float 16 is formed in a horizontally elongated hollow body having a diameter shorter than the inner diameter of the hot water pipe connecting portion 19 (that is, the diameter of the tap hole 12a). 12 can be inserted from the outside of the hot water storage tank 3 through the tap hole 12a. The end of the connection water sealing body 18 is provided with an outer flange portion 18b and an outer cylindrical portion 18c, and the outer cylindrical portion 18c and the inner cylindrical portion 18a are formed in a coaxial double tubular shape. Accordingly, when the inner cylindrical portion 18a of the connection water sealing body 18 is inserted into the hot water pipe connecting portion 19, the distal end portion of the hot water pipe connecting portion 19 is located between the outer cylindrical portion 18c and the inner cylindrical portion 18a. Mated. Thereby, the hot water pipe 13 is connected to the hot water pipe connecting portion 12. Further, since the connection water sealing body 18 is formed of an elastic member, the connection water sealing body 18 seals so that hot water does not leak from the connection portion.

[0038]

As described above, according to the solar water heater of the present invention, the following advantageous effects can be obtained.

According to the first aspect of the present invention, even if the level of the hot water in the hot water tank does not reach the upper wall of the hot water tank, the end of the float on the side where the tip of the hot water pipe is moored. This prevents the float from rising and rising from the surface of the water, making it possible to maintain the position of the tip of the hot water pipe near the surface of the hot water in the hot water tank at all times. It is possible to take out hot water with high temperature and take out hot water.

According to the second aspect of the present invention, since the hot water pipe can be attached to and detached from the hot water pipe connecting portion from the outside of the hot water storage tank, the hot water pipe can be easily replaced for maintenance or the like. And maintenance is excellent.

According to the third aspect of the present invention, since the float is formed in a horizontally elongated hollow body having a diameter smaller than the inner diameter of the hot water pipe connecting portion (that is, the diameter of the tap hole), With respect to the pipe connection, it can be detached from the outside of the hot water tank,
In maintenance and the like, the tapping pipe can be easily replaced.

According to the fourth aspect of the invention, it is possible to detachably connect the hot water pipe to the hot water pipe connecting portion,
Further, after the connection, the connection portion of the hot water pipe is sealed by the connection water sealing body, so that leakage of hot water from the connection portion can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a cutaway perspective view of a main part of a solar water heater according to Embodiment 1 of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a sectional view of a main part around a hot water pipe connecting portion of the solar water heater of FIG. 1;

FIG. 4 is a sectional view of a hot water storage tank of the solar water heater described in Japanese Utility Model Laid-Open No. 6-22871.

FIG. 5 is a view showing a state in which the float has risen to the surface of the water in the hot water tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Solar water heater 2 Heat collector 3 Hot water storage tank 3a Bottom surface 4 Outgoing pipe 5 Return pipe 6 House front side part 7 Building side part 8 1st side part 9 2nd side part 10 Top wall 10a Float holding part DESCRIPTION OF SYMBOLS 11 Water supply pipe 12 Hot water pipe connection part 12a Hot water outlet 13 Hot water pipe 14 Hot water pipe 14a Hot water part 15 Flexible part 16 Float 16a Float main body 16b Float mooring part 17 Base part 17a Hot water pipe connection flange 17b Internal screw 18 Connection water Enclosure 18a Inner cylinder part 18b Outer flange part 18c Outer cylinder part 19 Hot water pipe connection part 20 Fastening member 21 Hot water pipe 101 Hot water storage tank 102 Outgoing pipe 103 Return pipe 104 Automatic water supply tank 105 Water supply path 106 Air vent 107 Water supply pipe 108 Water supply pipe 109 Float 110 Hot water pipe 111 Hot water pipe 111a Base end 111b Hot water pipe 111c Flexible part 111d Hot water port 112 Float 112a mooring part

[Procedure amendment]

[Submission date] September 28, 1999 (1999.9.2)
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction contents]

[0018] As the float pressing portion may be integrally molded Hekomashi a hot water tank that site inside the time of blow molding, also other members in the case of sheet forming (vacuum pressure air forming) And may be formed by bonding.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0030

[Correction method] Change

[Correction contents]

Reference numeral 13 denotes a hot water pipe attached to the hot water pipe connecting portion 12 so as to be detachable from the outside of the hot water storage tank 3, and 14 denotes a hot water pipe 1
3 is a hot water pipe made of a tubular body having a central portion and a flexible portion 15 formed of a flexible bellows at a base end;
4 is a hot water pipe opened on the peripheral wall of the tip end, 16 is a hot water pipe 1
4, a float 16a is moored to the distal end of the hot water pipe 14 and is formed in a horizontally elongated hollow body. 16b is a float main body protruding from one end of the float main body 16a. 16a is a float mooring portion for mooring the distal end of the hot water pipe 14, 17 is a base made of a cylindrical body connected to the base end of the hot water pipe 14, and 18 is a base 1
7 is a connection water sealing body made of an elastic member such as synthetic rubber fitted on the outer peripheral side of the connector 7. Float pressing portion 10a is formed to protrude into the tank interior of the top wall 10 of the hot water storage tank 3 which pairs toward the float 16. The float main body 16a is formed such that its diameter is shorter than the diameter of the tap hole 12a. Further, a tapping pipe 21 for tapping hot water in the hot water storage tank 3 from outside of the hot water storage tank 3 is connected to the base 17 of the hot water supply pipe 13.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] Explanation of sign

[Correction method] Change

[Correction contents]

[Description of Signs] 1 Solar water heater 2 Heat collector 3 Hot water storage tank 3a Bottom surface 4 Outgoing pipe 5 Return pipe 6 House front side 7 Building side 8 First side 9 Second side 10 Top walls 10a float holding unit 11 water supply pipe 12 hot water pipe connecting portion 12a outflow 13 Toyukan 14 Shirubeyukan 14a Shirubeyu section 15 flexible section 16 float 16a float body 16b float tether 17 mouthpiece 17a exits the hot water tube connection flange 17b Inner screw 18 Connection water seal 18a Inner cylinder 18b Outer flange 18c Outer cylinder 19 Hot water pipe connection 20 Fastening member 21 Hot water pipe 101 Hot water tank 102 Outgoing pipe 103 Return pipe 104 Automatic water supply tank 105 Water supply path 106 Air Pull-out part 107 Water supply pipe 108 Water supply pipe 109 Float 110 Hot-water supply pipe 111 Hot-water supply pipe 111a Base end 111b Hot-water supply pipe 111c Flexible part 11 d adopted sprue 112 float 112a anchoring portion

Claims (4)

[Claims] 1. A solar water heater in which a heat collector and a hot water storage tank are connected by a pipe for circulating hot water, a hot water supply provided on one side of the hot water storage tank and provided with a tap hole penetrating the side. A pipe connecting part, a hot water pipe attached to the hot water pipe connecting part, a hot water pipe made of a tubular body having a flexible portion in at least a part of the hot water pipe, and a hot water pipe attached to a distal end of the hot water pipe. And a float holding portion formed on an upper wall of the hot water storage tank facing the float that floats horizontally in the hot water storage tank so as to protrude toward the inside of the hot water storage tank. vessel. 2. The solar water heater according to claim 1, wherein the hot water pipe is detachably attached to the hot water pipe connecting portion from outside the hot water storage tank. 3. The float according to claim 1, wherein the float is formed in a horizontally elongated hollow body shape having a diameter shorter than the diameter of the tap hole, and the float body is disposed so as to protrude from one end of the float body. 3. A float mooring portion mooring at a tip portion of the hot water pipe.
A solar water heater according to claim 1. 4. The tapping pipe connecting section includes a tapping pipe connecting section composed of a tubular body which is communicated with the taphole and protrudes from the side surface of the hot water storage tank and is disposed. A base portion formed of a tubular body connected to the base end portion of the hot water pipe and the tapping tube connection portion; and a connection water seal body formed of an elastic member fitted on the outer peripheral side of the base portion. The connection water sealing body has an inner tubular portion formed in a tubular shape, an outer flange portion formed in a flange shape at one end of the inner tubular portion, and a tubular body having one end connected to the outer flange portion. An outer cylinder portion comprising: an outer cylinder portion and the inner cylinder portion are formed in a coaxial double tubular shape, and the hot water pipe connection is provided between the outer cylinder portion and the inner cylinder portion. The solar water heater according to claim 2 or 3, wherein the portion is insertable.