JPH094927A - Hot water supplier - Google Patents

Abstract

PURPOSE: To ensure cost down, make an apparatus compact, and improve the maintenance of a direct pressure type petroleum hot water supplier. CONSTITUTION: This hot water supplier is provided with a mixing valve assembly 16 in which there are integrally formed a water supply communication tube 19b constituting part of a water supply pipe line P1, a flow sensor 26 provided on the water supply communication tube 19b for detecting the amount of flowing water through the water supply communication tube 19b, a hot water supply communication tube 19c constituting part of the hot water supply tube line P2, a bypass tube provided to communicate between the water supply communication tube 19b and the hot water supply communication tube 19c, and a mixing valve 25 disposed at a connection part between the bypass tube and the hot water supply communication tube 19c for adjusting the amount of water introducing from the bypass tube into the hot water supply communication tube 19c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater such as a direct pressure oil water heater or a gas water heater.

[0002]

2. Description of the Related Art Conventionally, in the hot water supply operation of a water heater of this type, a part of the water supplied from the water supply inlet to the water supply pipe is heated by the heat exchanger and merges with the remaining water that has passed through the bypass pipe. After that, the hot water is supplied to the hot water outlet through the hot water supply pipe.

Here, the flow sensor detects the flow rate of water supplied to the heat exchanger, and the mixing valve appropriately adjusts the mixing ratio of the hot water supplied from the heat exchanger and the water supplied from the bypass pipe. By doing so, the hot water supply operation at a predetermined temperature is controlled.

[0004]

However, in this case, the structure around the mixing valve including the bypass pipe, the flow sensor and the mixing valve becomes a large-scale structure, so that the cost of the water heater can be reduced, the size can be reduced, and the maintainability can be improved. There was a drawback that was an obstacle to the

Further, during hot water supply operation of the water heater, a force is applied to the water supply pipe and the hot water supply pipe in an arbitrary direction by the water hammer, and this force causes vibration, and the vibration causes each pipe to move in various directions. That is, since it is violent, there is a possibility that damages such as cracks may occur in the components around the mixing valve (particularly resin parts) and the pipe joint.

In view of the above circumstances, the present invention can reduce costs, reduce size, and improve maintainability, and prevent damage to components around the mixing valve from occurring. The purpose is to provide.

[0007]

Means for Solving the Problems That is, the present invention is to provide a muffler and a heat exchanger installed in a casing up and down, a water supply inlet and a hot water supply outlet provided in the casing, an inlet of the heat exchanger and the water supply. A water supply pipe connecting the inlet, a hot water supply pipe connecting the outlet of the heat exchanger and the hot water supply outlet, and a part of which is arranged in parallel with the water supply pipe, and the water supply pipe and the hot water supply pipe In a water heater provided with a bypass pipe connecting the passage, a water supply communication pipe forming a part of the water supply pipe passage, and a flow sensor provided in the water supply communication pipe to detect the amount of flowing water of the water supply communication pipe, A hot water supply pipe forming a part of the hot water supply pipe, the water supply pipe and the bypass pipe provided so as to communicate with the hot water supply pipe,
The mixing valve assembly is integrally provided with a mixing valve which is arranged at a connection portion between the bypass pipe and the hot water supply communication pipe and which adjusts an amount of water entering from the bypass pipe to the hot water supply communication pipe.

Further, the water heater according to the present invention is constructed by sandwiching the water supply pipe and four portions of the hot water supply pipe which are arranged in parallel with each other by a pipe pressing metal fitting and a fixing metal fitting and fixing them to a muffler.

Further, in the water heater according to the present invention, the pipe pressing fitting is made of spring steel.

Further, in the water heater according to the present invention, a reinforcing plate is inserted into the water inlet to sandwich the casing, and a reinforcing plate is inserted between the hot water outlet and the muffler to insert the casing into the casing. It is configured to be sandwiched.

Further, in the water heater according to the present invention, the water supply communicating pipe forming a part of the water supply pipe and the rest of the water supply pipe are separated from each other, and these are detachably connected using a quick fastener. At the same time, the hot water supply communicating pipe forming a part of the hot water supply pipe and the rest of the hot water supply pipe are separated from each other, and these are detachably connected using a quick fastener.

Further, in the water heater according to the present invention, the insertion allowance of the remaining portion of the water supply pipe to the water supply communication pipe forming a part of the water supply pipe is lengthened and forms a part of the hot water supply pipe. The insertion allowance of the remaining portion of the hot water supply pipe with respect to the hot water supply communication pipe may be lengthened.

[0013]

In the present invention having the above-mentioned structure, the water supply communication pipe,
Since the hot water supply pipe, bypass pipe, flow sensor and mixing valve are integrally formed as a mixing valve assembly, the components around the mixing valve can be made compact and the mixing valve assembly can be easily attached and detached. .

Further, according to the present invention, since the water supply pipe and the hot water supply pipe are fixed to the muffler through the fixing metal fittings and the fixing metal fittings, it is possible to suppress the violence of various parts due to the vibration of the water hammer.

Further, in the present invention, the pipe pressing member made of spring steel acts so as to further improve the vibration absorbing effect.

Further, in the present invention, the strength of the periphery of the water supply inlet and the hot water supply outlet is improved by the reinforcing plate, and the water supply inlet and the hot water supply outlet are firmly fixed to the casing.

Further, in the present invention, the adoption of the quick fastener acts to facilitate the attachment and detachment of the mixing valve assembly.

Further, according to the present invention, the remaining portion of the water supply pipe line and the remaining portion of the hot water supply pipe line are moved upward or downward so that they can be easily fitted into and separated from the mixing valve assembly.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of a direct pressure type oil water heater.
2 is a front view of the essential parts of the oil water heater shown in FIG. 1, FIG. 3 is a side view of the essential parts of the oil water heater shown in FIG. 1, and FIG. 4 is a view showing a method for fixing pipes. Is its front view, (b) is its side view, (c) is its plan view, FIG. 5 is a plan view showing an example of a reinforcing plate, FIG. 6 is a front view showing an example of a mixing valve assembly, and FIG. It is a figure which shows the attachment / detachment method of a mixing valve assembly, (a) is a front view which shows the state which the water supply pipe (or hot water supply pipe) was fitted in the mixing valve assembly.
(B) is a front view showing a state in which the water supply pipe (or the hot water supply pipe) is separated from the mixing valve assembly.

Direct pressure type oil water heater 1 which is a kind of water heater
As shown in FIG. 1, has a casing 2, and a heat exchanger 3 is installed in the casing 2. A muffler 5 is placed on the upper side of the heat exchanger 3, and an exhaust port 6 is mounted on the upper side of the muffler 5 so as to project upward from the top plate 2 a of the casing 2.

Further, as shown in FIG. 1, a water supply inlet 7 is fixed to the top plate 2a of the casing 2, and the water supply inlet 7
A water supply pipe 9 is connected to. Here, the water supply inlet 7 is
As shown in FIGS. 2 and 3, the flange portion 7a is screwed to the upper side of the top plate 2a of the casing 2, and the reinforcing plate 10 is inserted below the top plate 2a of the casing 2. . Therefore, the top plate 2 a of the casing 2 is sandwiched from above and below by the flange portion 7 a of the water supply inlet 7 and the reinforcing plate 10.

Further, as shown in FIG. 1, a hot water supply outlet 12 is fixed to the top plate 2a of the casing 2, and a hot water supply pipe 13 is connected to the hot water supply outlet 12. Here, the hot water supply outlet 12 has its flange portion 1 as shown in FIGS.
2a is screwed to the upper side of the top plate 2a of the casing 2, and a reinforcing plate 15 is inserted below the top plate 2a of the casing 2 so as to be sandwiched between the reinforcing plate 15 and the muffler 5. Therefore, the top plate 2a of the casing 2 is sandwiched between the flange portion 12a of the hot water supply outlet 12 and the reinforcing plate 15 from above and below, and the reinforcing plate 15 is supported by the muffler 5 from below.

A mixing valve assembly 16 is connected to the lower ends of the water supply pipe 9 and the hot water supply pipe 13, and the mixing valve assembly 16 includes a communication pipe 19, a check valve 24, a mixing valve 25, a flow sensor 26, Thermistor 2
7, a water supply pipe receiving port 20, a hot water supply pipe receiving port 21, a heat exchange forward pipe receiving port 22, and a heat exchange returning pipe receiving port 23.

That is, the mixing valve assembly 16 has an H-shaped communication pipe 19, and the communication pipe 19 includes a water supply communication pipe 19b and a hot water supply communication pipe 19c which are parallel to each other, and the water supply communication pipe 19b and the hot water communication pipe 19c. It is composed of a bypass pipe 19a which communicates the pipes 19c with each other. Water connection pipe 1
A flow sensor 26 and a check valve 24 are attached to 9b, and a thermistor 27 is attached to the hot water supply communication pipe 19c. Further, the bypass pipe 19a and the hot water supply communication pipe 19
A mixing valve 25 is attached to the connecting portion with c. Further, the water supply pipe receiving port 2 is provided at the tip of the communication pipe 19.
0, a hot water supply pipe receiving port 21, a heat exchange forward pipe receiving port 22 and a heat exchange returning pipe receiving port 23 are attached. Water pipe receiving port 20
As shown in FIG. 1, the water supply pipe 9 is connected by a quick fastener 31, and the hot water supply pipe 13 is connected by a quick fastener 32 to the hot water supply pipe receiving port 21.
On the other hand, in the heat exchange outward pipe receiving port 22, a heat exchange outward pipe 29 connected to the inlet of the heat exchanger 3 is provided with a quick fastener 33.
A heat exchange return pipe 30 connected to the outlet of the heat exchanger 3 is connected to the heat exchange return pipe receiving port 23 by a quick fastener 34.

The water supply pipe 9, the water supply communication pipe 19b of the communication pipe 19 and the heat exchange outward pipe 29 constitute a water supply pipe line P1 between the inlet of the heat exchanger 3 and the water supply inlet 7, while hot water supply is performed. Tube 1
3, hot water supply communication pipe 19c of the communication pipe 19 and heat exchange return pipe 30
Defines a hot water supply pipe P2 between the outlet of the heat exchanger 3 and the hot water supply outlet 12.

By the way, as shown in FIGS. 2 and 3, a fixing member 35 is fixed to the muffler 5 with a screw, and the fixing member 35 has a water supply pipe 9 and a hot water supply pipe 1 as shown in FIG.
3, the heat exchange outward pipe 29 and the heat exchange return pipe 30 are pressed down by the pipe pressing fittings 36 made of U-shaped spring steel. Here, since one of the pipe pressing fittings 36 is insertable, a copper pipe having poor dimensional accuracy is used for the water supply pipe 9, the hot water supply pipe 13, the heat exchange forward pipe 29 or the heat exchange return pipe 3.
Even when it is used as 0, it can be reliably pressed down by the pipe pressing fitting 36.

As shown in FIG. 7, at the connecting portion between the water supply pipe 9 and the water supply inlet 7, the insertion allowance L1 of the water supply pipe 9 into the water supply inlet 7 is longer than the insertion allowance into the water supply pipe receiving port 20. Also at the connecting portion between the hot water supply pipe 13 and the hot water supply outlet 12, the insertion margin L2 of the hot water supply pipe 13 for the hot water supply outlet 12 is longer than the insertion allowance for the hot water supply pipe receiving port 21.

Since the direct-pressure type oil water heater 1 has the above-described structure, during hot water supply operation using the oil water heater 1, as shown in FIG. 6, normal temperature water is supplied through the water inlet 7. It is supplied to the water supply pipe 9 and further supplied to the water supply communication pipe 19b of the communication pipe 19 via the water supply pipe receiving port 20, and a part of the water reaches the mixing valve 25 via the bypass pipe 19a of the communication pipe 19 and the rest thereof. Water of the flow sensor 26,
After being supplied to the heat exchange forward pipe 29 via the heat exchange forward pipe receiving port 22 via the check valve 24 and being heated by the heat exchanger 3, the heat exchange returning pipe 30 communicates via the heat exchange returning pipe receiving port 23. Tube 1
Returning to the hot water supply communication pipe 19c of No. 9, the mixing valve 25 joins both (a part of the water and the rest of the water) into hot water of a predetermined temperature, which is supplied to the hot water supply pipe 13 via the hot water supply pipe receiving port 21 and the hot water supply outlet. It is discharged from 12.

Here, the flow sensor 26 detects the flowing amount of water supplied to the heat exchanger 3, the thermistor 27 detects the hot water temperature of the heat exchanger 3, and the mixing valve 2
Since 5 appropriately adjusts the mixing ratio of the hot water supplied from the heat exchanger 3 and the water supplied from the bypass pipe 19a of the communication pipe 19, the hot water supply operation is performed at a predetermined temperature.

At this time, a force acts on the water supply pipe 9, the hot water supply pipe 13, the heat exchange forward pipe 29, and the heat exchange return pipe 30 by the water hammer in an arbitrary direction. As described above, the pipe 29 and the heat exchange return pipe 30 are fixed to the muffler 5 via the fixing fittings 35, and the pipe pressing fittings 36 made of spring steel exert a vibration absorbing effect. Since the hot water supply outlet 12 is firmly fixed to the casing 2 by the reinforcing plate 1015, violent vibration is suppressed,
As a result, it is possible to prevent damage to the components of the mixing valve assembly 16 such as cracks.

Further, when replacing the mixing valve assembly 16 for maintenance and inspection of the oil water heater 1, the mixing valve assembly 16 can be easily removed or attached by the following procedure. .

That is, to remove the mixing valve assembly 16, first, the quick fasteners 31, 32, 33, 3 are used.
After removing 4, the water supply pipe 9 and the hot water supply pipe 13 are lifted up. Then, the state shown in FIG. 7A is changed to the state shown in FIG. 7B, and the mixing valve assembly 1 has been operated until then.
The water supply pipe 9 fitted into the water supply pipe receiving port 20 of 6 is separated, and the hot water supply pipe 13 previously fitted into the hot water supply pipe receiving port 21 of the mixing valve assembly 16 is separated. Next, pull the mixing valve assembly 16 toward you,
In that state, the mixing valve assembly 16 is pulled upward. Then, the heat exchange forward pipe 29 is removed from the heat exchange forward pipe receiving port 22 of the mixing valve assembly 16, and at the same time, the heat exchange return pipe 30 is removed from the heat exchange returning pipe receiving port 23 of the mixing valve assembly 16. The solid 16 can be easily removed.

On the contrary, in order to attach the mixing valve assembly 16 thus removed, first, the heat exchange forward pipe receiving port 22 and the heat exchange returning pipe receiving port 23 of the mixing valve assembly 16 are replaced with the heat exchange forward pipe 29 and the heat exchange returning pipe, respectively. Fit on tube 30. Next, the water supply pipe 9 is pushed down and fitted into the water supply pipe receiving port 20 of the mixing valve assembly 16, and the hot water supply pipe 13 is pushed down and fitted into the hot water supply pipe receiving port 21 of the mixing valve assembly 16. Finally, by mounting the quick fasteners 31, 32, 33, 34, the mixing valve assembly 16 can be easily mounted.

[0034]

As described above, according to the present invention, a muffler and a heat exchanger installed vertically in a casing,
A water supply inlet and a hot water supply outlet provided in the casing, a water supply pipe connecting the inlet of the heat exchanger and the water supply inlet, an outlet of the heat exchanger and the hot water supply outlet, and a part of the water supply outlet. In a water heater such as a direct pressure type oil water heater having a hot water supply pipe arranged in parallel with the water supply pipe and a bypass pipe connecting these water supply pipe and the hot water supply pipe, a part of the water supply pipe is A water supply communication pipe which constitutes the flow sensor, a flow sensor which is provided in the water supply communication pipe and detects the amount of flowing water of the water supply communication pipe, a hot water supply communication pipe which constitutes a part of the hot water supply pipe, the water supply communication pipe and this hot water supply The bypass pipe provided so as to communicate with the communication pipe, and a mixing valve which is arranged at a connection portion between the bypass pipe and the hot water supply communication pipe and which adjusts the amount of water entering from the bypass pipe into the hot water supply communication pipe are integrated. Formed in the mixin Since it is configured with a valve assembly, since the water supply communication pipe, the hot water communication pipe, the bypass pipe, the flow sensor and the mixing valve are integrally formed as a mixing valve assembly, the mixing valve assembly can be easily attached and detached. It is possible to reduce the cost of the water heater, make it compact, and improve the maintainability.

Further, according to the present invention, the four portions of the water supply pipe and the hot water supply pipe which are arranged in parallel are sandwiched between the pipe pressing metal fitting and the fixing metal fitting and fixed to the muffler. Since the water passage and the hot water supply pipe are fixed to the muffler through the fixing metal fittings and the fixing metal fittings, the violence of the water hammer is suppressed, preventing damage to the components around the mixing valve. It becomes possible to do.

Further, according to the present invention, since the pipe holding metal fitting is made of spring steel, the vibration holding effect is further improved by the pipe holding metal fitting made of spring steel, so that the above-mentioned effect becomes more remarkable. .

Further, according to the present invention, a reinforcing plate is inserted into the water inlet to sandwich the casing, and a reinforcing plate is inserted between the hot water outlet and the muffler to sandwich the casing. Since the water supply inlet and the hot water supply outlet are firmly fixed to the casing by the reinforcing plate, the above-mentioned effect becomes more remarkable, and the water supply pipe line and the hot water supply pipe are installed during the plumbing work. It becomes possible to suppress the fluctuation of the road.

Further, according to the present invention, the water supply communicating pipe forming a part of the water supply pipe and the rest of the water supply pipe are separated from each other, and these are detachably connected using a quick fastener. , Separating the hot water supply communication pipe forming a part of the hot water supply pipe and the rest of the hot water supply pipe from each other,
Since these are configured to be detachably connected using quick fasteners, the adoption of quick fasteners makes it easy to attach and detach the mixing valve assembly, which makes it easy to replace the mixing valve assembly. It is possible to reduce the cost of the machine, make it compact, and improve the maintainability.

Further, according to the present invention, the insertion allowance of the remaining portion of the water supply pipe to the water supply communication pipe forming a part of the water supply pipe is lengthened, and a part of the hot water supply pipe is formed. Since the insertion allowance of the remaining part of the hot water supply pipe to the hot water supply pipe is made long, it is possible to fit / separate with the mixing valve assembly by moving the remaining part of the water supply line and the remaining part of the hot water supply line. Therefore, the maintainability can be further improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a direct pressure type oil water heater.

FIG. 2 is a front view of a main part of the oil water heater shown in FIG.

FIG. 3 is a side view of a main part of the oil water heater shown in FIG.

FIG. 4 is a diagram showing a method of fixing a pipe, (a) is a front view thereof, (b) is a side view thereof, and (c) is a plan view thereof.

FIG. 5 is a plan view showing an example of a reinforcing plate.

FIG. 6 is a front view showing an example of a mixing valve assembly.

7A and 7B are views showing a method for attaching and detaching the mixing valve assembly, wherein FIG. 7A is a front view showing a state in which a water supply pipe (or a hot water supply pipe) is fitted in the mixing valve assembly, and FIG. It is a front view showing a state in which the hot water supply pipe) is separated from the mixing valve assembly.

[Explanation of symbols]

 1 …… Water heater (direct pressure type oil water heater) 2 …… Casing 3 …… Heat exchanger 5 …… Muffler 7 …… Water inlet 10,15 …… Reinforcement plate 12 …… Hot water outlet 16 …… Mixing valve assembly Solid 19a ...... Bypass pipe 19b …… Water supply communication pipe 19c …… Hot water supply pipe 25 …… Mixing valve 26 …… Flow sensor 31, 32, 33, 34 …… Quick fastener 35 …… Fixing fitting 36 …… Piping holding fitting L1, L2 …… Insertion fee P1 …… Water supply pipe P2 …… Hot water supply pipe

Claims (6)

[Claims] 1. A muffler and a heat exchanger installed up and down in a casing, a water supply inlet and a hot water supply outlet provided in the casing, and a water supply pipe connecting the inlet of the heat exchanger and the water supply inlet. A hot water supply pipe that connects the outlet of the heat exchanger and the hot water supply outlet and a part of which is arranged parallel to the water supply pipe, and a bypass pipe that connects the water supply pipe and the hot water supply pipe In the hot water supply device, a part of the hot water supply pipe, a water supply communication pipe forming a part of the water supply pipe, a flow sensor provided in the water supply communication pipe for detecting the amount of flowing water of the water supply communication pipe, and a part of the hot water supply pipe Hot water supply pipe, the bypass pipe provided so as to connect the hot water supply pipe and the hot water supply pipe, and the hot water communication pipe arranged at a connection portion between the bypass pipe and the hot water supply pipe. Adjust the amount of water entering the pipe Water heater, characterized in that it comprises a mixing valve assembly integrally formed with a mixing valve. 2. The water heater according to claim 1, wherein four portions of the water supply pipe and the hot water supply pipe which are arranged in parallel are sandwiched between a pipe pressing metal fitting and a fixing metal fitting and fixed to the muffler. 3. The water heater according to claim 2, wherein the pipe retainer is made of spring steel. 4. A reinforcing plate is inserted into the water inlet to sandwich the casing, and a reinforcing plate is inserted between the hot water outlet and the muffler to sandwich the casing. The water heater according to any one of claims 1 to 3. 5. A water supply communication pipe forming a part of the water supply pipe and the rest of the water supply pipe are separated from each other, and these are detachably connected using a quick fastener, and a part of the hot water supply pipe is provided. The hot water supply communication pipe and the remaining part of the hot water supply pipe line which constitute the above are separated from each other, and these are detachably connected using a quick fastener, and the hot water supply pipe according to any one of claims 1 to 4 is characterized in that Water heater. 6. The insertion allowance of the remaining portion of the water supply conduit to the water supply conduit forming a part of the water supply conduit is lengthened, and the hot water supply conduit for the hot water supply conduit forming a part of the hot water supply conduit is formed. The water heater according to claim 5, wherein the insertion allowance of the remaining portion is lengthened.