JPH0894104A - Hot water supply equipment - Google Patents

Abstract

PURPOSE: To obtain a hot water supply equipment which can always supply hot water of prescribed temperature from the beginning of opening of a faucet. CONSTITUTION: In hot water supply equipment 21 wherein an immediate hot water supply tank 30 is provided in a hot water supply pipeline 24 of a main hot water supply apparatus 22, a mixing valve 35 is provided at a joining point of an outlet pipeline 34 of the immediate hot water supply tank 30 and a bypass pipeline 33 of the hot water supply pipeline 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply device for a hot water supply heat source and a terminal hot water supply port distant from the hot water supply heat source device in a central hot water supply system or the like.

[0002]

2. Description of the Related Art Conventionally, when hot water is supplied to a plurality of hot water supply ports in this type of central hot water supply, since the hot water supply port far from the heat source device has a long pipe in the middle, cold water in the pipe must be used before starting to use the hot water supply. In addition to the inconvenience, there is an inconvenience that it takes time until hot water of a predetermined temperature comes out. As means for solving such inconvenience and inconvenience, there is, for example, the one in Japanese Patent Publication No. 3-70137.

As shown in FIG. 7, in the hot water supply device 1 disclosed in this publication, a main water heater heat source device 2 is provided with a water supply circuit 3 and a hot water supply circuit 4 arranged in parallel, and the water supply circuit 3 and the hot water supply circuit are provided. 4 is provided with a faucet 5, a water side valve 6 is provided on the side of the water entrance circuit 3 on the side of the faucet 5, and a hot water side valve 7 is provided on the side of the hot water supply circuit 4 respectively. 6,
Adjust the temperature and the amount of water by 7 and tap the appropriate amount of hot water 5
The control valve 8 is arranged on the side of the hot water supply circuit 4 and is connected to the hot water storage tank 10 having the heating device 11 such as an electric heater at the bottom through the inlet circuit 9, and Control valve 8 of hot water supply circuit 4 from hot water storage tank 10
An outlet circuit 12 connected to a predetermined position on the downstream side of is provided, and a branch circuit 14 is formed between the connection point 13 and the control valve 8.

The control valve 8 is, as shown in FIG.
The detection unit 15 that detects the temperature of the incoming water supplied from the main hot water supply heat source 2 to the hot water storage tank 10, and the amount of water that flows into the inlet circuit 9 is changed by the opening degree of the valve seat 16 and the movable valve body 17 of the inlet circuit 9. The movable valve includes a valve portion 18 and an operating portion 19 such as a piston that changes the expansion of the thermowax in the detection portion into the action of the movable valve body 17 on the valve seat 16 when the detection portion 15 receives heat and the temperature rises. The body 17 is biased toward the opening by a restoring spring having a predetermined spring pressure. And hot water storage tank 1
The inside of 0 is heated to 85 ° C. by the heating device 11, set to supply hot water of 40 ° C. from the faucet 5, and set to supply hot water of 45 ° C. from the main hot water supply heat source device 2. .

[0005]

However, in the conventional hot water supply apparatus 1 configured as described above, as shown in FIGS. 9 and 10, at the initial hot water supply t0, the upstream side of the control valve 8 of the hot water supply circuit 4 is provided. The water in the hot water supply circuit 4 on the side has a temperature of θ 1, and the hot water of the outlet circuit 12 of the hot water storage tank 10 has a temperature of θ 3 (85 ° C.). Therefore, when the faucet 5 is opened and the hot water valve 7 is opened, the cold water in the hot water supply circuit 4 is divided into the inlet circuit 9 and the branch circuit 14 of the hot water storage tank 10 via the control valve 8. Therefore, in FIG. 9, a is the hot water discharge temperature of the hot water storage tank 10, b is the mixing temperature at the confluence of the outlet circuit 12 and the branch circuit 14, and c is the temperature of the hot water supply circuit 4, the inlet at the initial hot water supply t0. Even if the splitting ratio between the circuit 9 and the branch circuit 14 is set by the control valve 8 and the mixing temperature at the confluence of the outlet circuit 12 and the branch circuit 14 is set to 40 ° C., the hot water is stored by the cold water from the inlet circuit 9. The hot water temperature a in the bath 10 is lowered to a1 after time t1 as shown in the figure,
As a result, the mixing temperature b at the confluence of the outlet circuit 12 and the branch circuit 14 is lowered to the temperature b1 from the set temperature of 40 ° C. (θ2) after the time t1, and then the elapsed time during which the water in the hot water supply circuit 4 is removed. Only after t2, the hot water supply temperature θ2 can be made constant.
There was a problem that hot water could not be supplied at a constant temperature from the beginning. In particular, when the user is using the shower, a slight temperature decrease (2 to 3 ° C.) is very uncomfortable.

Further, the main hot water supply heat source device 2 generally has a temperature characteristic as shown in FIG. 11, that is, it is set to generate hot water of 60 ° C. in the main hot water supply heat source device 2, for example. In this case, even if the main hot water supply heat source device 2 is turned off, the residual hot water inside the main hot water supply heat source device 2 has a hot water temperature of about 68.4 ° C. as indicated by P1. When the main hot water supply heat source device 2 is turned on again and ignited, water is introduced into the main hot water supply heat source device 2 and then ignited.
It has a characteristic that hot water of about 1.3 ° C is discharged, and then the set temperature of 60 ° C is gradually discharged. In the hot water supply device 1 of Fig. 7, the faucet 5 is opened to discharge hot water, which is being used. In addition, there is a problem that when the water is once stopped and the faucet 5 is opened again to discharge water, a so-called sandwich phenomenon occurs in which hot water of P1 is first discharged and then cold water of P2 is discharged. .

The present invention has been made in order to solve the above-mentioned conventional problems. It is possible to always supply hot water at a constant temperature from the beginning of opening the faucet, and when the faucet is closed and reopened during use to discharge the water. Another object is to provide a hot water supply device capable of supplying hot water at a constant temperature.

[0008]

In order to solve the above technical problems, the present invention provides a hot water supply apparatus in which an immediate hot water tank is arranged in a hot water supply pipe of a main hot water supply device, and an outlet pipe of the immediate hot water tank is provided. The hot water supply device has a configuration in which a mixing valve is arranged at the confluence of the bypass line of the hot water supply line. Further, the hot water supply apparatus is provided with a mixing tank provided in the bypass pipe upstream of the mixing valve. Further, in the mixing tank, there is a hot water supply device in which a swirl plate for swirling the water flowing therein is installed. The mixing valve is a water heater in which a small hole for circulating hot water from the immediate hot water tank to the mixing tank is formed.

[0009]

[Operation] By providing a mixing valve at the confluence of the outlet pipe of the instant hot water tank and the bypass pipe of the hot water supply pipe, the hot water at the set temperature can be stably supplied regardless of winter or summer. can do. Also, by providing a mixing tank on the upstream side of the mixing valve, when hot water is discharged from the faucet, temporarily stopped and then discharged again, the sandwich phenomenon of hot water from the water heater in the mixing tank is mitigated. Therefore, hot water with no temperature change can be satisfactorily discharged from the faucet. In addition, since a swirl plate is provided in the mixing tank, the hot water can be swirled and mixed well in the mixing tank, and the sandwich phenomenon can be alleviated more effectively and hot water with a uniform temperature can be discharged. Will be possible. Further, since the mixing valve has a small hole, it is possible to circulate the hot water from the immediate hot water tank to the mixing tank side, and to prevent the dead water from being satisfactorily generated.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram of a hot water supply apparatus, FIGS. 2 and 3 are sectional views for explaining the action of a mixing valve, and FIG. 4 is a mixing tank. 5 is a perspective view of the swivel plate, FIG.
As shown in FIG. 1, the hot water supply device 21 of this example has a main hot water supply device 22.
A water supply pipe line 23 and a hot water supply pipe line 24 are connected in parallel with each other, and a faucet 25 is provided between the two pipe lines 23, 24, and a water tap 26 is also provided in the water supply pipe line 23.
A hot water supply plug 27 is arranged in the hot water supply pipe 24.

An instant hot water tank 30 having a heater 31 is arranged in the hot water supply pipe 24. This hot water supply pipe 24 is an inlet pipe 3 connected to the hot water tank 30.
2 and the bypass conduit 33, and the mixing tank 28 is provided in the bypass conduit 33,
The bypass pipe line 33 is connected to a mixing valve 35 disposed upstream of the hot water tap 27, and the outlet pipe line 34 of the hot water tank 30 is connected to the mixing valve 35.

As shown in FIGS. 2 and 3, the mixing valve 35 includes a valve body 36 and an element member 51.
And the adjustment valve 4 attached to the element member 51.
5 and a temperature setting unit 55. An operating hole 37 for accommodating the element member 51 is formed through the center of the valve body 36, and a lower portion of the operating hole 37 is
First connection part 3 for connecting the outlet pipe line 34 of the instant hot water tank 30
8 and a bypass line 33 downstream of the mixing tank 28
A second connecting portion 39 for connecting the two is formed, and both connecting portions 38, 39 are vertically divided by a valve seat 40. The toilet seat 40 on the second connecting portion 39 side is formed with a small hole 70 penetrating to the first connecting portion 38 side. Also,
A valve receiving lid 41 is attached to the lower end of the operation hole 37, and a spring receiving concave portion 42 is provided in the center of the valve receiving lid 41, and a coil spring 43 having a predetermined spring pressure for elastically mounting the adjusting valve 45. Is installed.

The adjusting valve 45 is provided in the sliding hole 4 of the valve seat 40.
0a is slidably fitted, and a ring portion 46 having a predetermined height h is formed, and the element member 51 and the receiving portion 47 of the coil spring 43 are formed in the center portion thereof.
Is formed, and a plurality of circulation holes 48 are formed in the four circumferences thereof to connect the first connecting portion 38 and the second connecting portion 39. In addition, a third connecting portion 49 of a part 24 a of the hot water supply pipe 24 connected to the hot water supply tap 27 is formed at a predetermined position of the valve body 36. A partition member 50 is attached to the operation hole 37 on the upper side of the third connecting portion 49.
An element member 51 is vertically slidably attached to the lower end of the element member 51.
Is connected to the receiving portion 47 of the.

The element member 51 is composed of a case body 52 in which wax is enclosed and a piston 53,
Due to the thermal expansion of the wax, the case body 52 is moved to the piston 53.
The temperature setting part 55 is provided on the upper side of the partitioning member 50 in which the element member 51 is inserted and supported.
Are formed. The temperature setting unit 55 is provided with a case body 56 provided with a temperature scale for temperature setting. The case body 56 is formed of a cylindrical body 56a and a top plate 56b into a bottomed cylindrical body. An element receiving member 57 is attached to the opening side of 56 via a stop ring.

The receiving member 57 includes an element member 51.
The receiving recess 57a of the piston 53 is formed to have a substantially hat-shaped cross section, and a step surface is formed on the outer peripheral surface thereof, and a predetermined spring pressure is provided between the step surface and the top plate 56b. The coil springs 58a and 58b are elastically mounted.
The screw portion 5 is provided on the outer periphery of the case body 56 thus provided.
6c is formed and screwed to a screw member 59 attached to the valve body 36 through the same screw portion 56c, and the case body 56 is screwed back and forth, whereby the lower end portion 45a of the adjustment valve 45 and the valve receiving lid. The distance T1 from the receiving surface 41a of 41,
By adjusting the distance T2 between the upper end portion 45b of the adjusting valve 45 and the seat surface 39a of the second connecting portion 39, both distances T1 and T2 can be adjusted.
The amount of hot water and the amount of water from 2 are adjusted, and further mixed in the mixing chamber 60 to supply the hot water having the temperature of the indicated scale.

The above-mentioned main water heater 22 has a temperature θ2.
The hot water tank 30 is set to supply hot water (about 45 ° C.), and the hot water tank 30 is set to maintain the internal hot water at a temperature θ3 (80 ° C.) with a capacity of about 5 liters.
The mixing valve 35 is set to supply hot water having a temperature of about 45 ° C. to the faucet 25. The temperature θ2 and the mixing valve set temperature are preferably set to the same temperature of about 40 to 50 ° C. However, if the faucet has a temperature control function such as a wax thermostat, even if the temperature of the main water heater is set to a high temperature (about 80 ° C.), it can be used.

Further, the mixing tank 28 has a capacity of about 1.2 liters and is set so that the internal hot water temperature is maintained at about 60 ° C. As shown in FIG. Has a swivel plate 29 installed therein. The swivel plate 29 has a structure as shown in a perspective view in FIG. 5, and the outer peripheral flange portion 2 that abuts the inner peripheral surface of the mixing tank 28 is provided on the outer peripheral side of the main body portion 29a of the swirl plate 29.
9b is integrally formed, and a plurality of slanted ridges 29c, 29c, 2 are formed on the main body 29a at predetermined intervals in a cut-and-raised shape.
9c are formed, and the swirling ports K, K, K are formed at predetermined intervals by the inclined raised portions 29c, and the hot and cold water flowing from the bypass pipe 33 into the mixing tank 28 is swirling port. By passing through K, K, K, a swirl flow is formed in the mixing tank 28 as shown in FIG. 4, and this swirl flow causes the mixing tank 2 to flow.
Hot water is mixed well in 8, and the mixed hot water having a constant temperature can be discharged from the outlet side.

Next, the hot water supply at the initial hot water supply time t0 of the hot water supply device 21 of the present embodiment, which has been piped as described above, will be described with reference to FIG. The mixing valve 35 is arranged at the confluence of the bypass conduit 33 of the conduit 24. Therefore, the temperature of hot water discharged from the hot water tank 30 at the initial time t0 of hot water supply is θ3, and the temperature of hot water discharged from the mixing valve 35 is θ.
2, and the water temperature of the hot water supply pipe 24 is θ1, the temperature curves of a, b, and c are traced after a predetermined time t2. That is, when the opening / closing valve 25a of the faucet 25 is opened,
After the hot water in the mixing tank 28 comes out, the cold water staying in the hot water supply pipe 24 is branched, a part of the cold water flows into the hot water tank 30 through the inlet pipe 32, and the other is mixed valve. It is flowed to 35 via a bypass line 33. Then, the hot water tank 30 that receives the water from the water supply pipe 24
The temperature curve a therein is lowered like the temperature a1. The hot water lowered to the temperature a1 is supplied to the mixing valve 35 from the outlet pipe line 34.

The temperature of the hot water supplied to the mixing valve 35 is a temperature θ3 'higher than the set temperature θ2 of the mixing valve 35. Therefore, the hot water from the instant hot water tank 30 flows into the mixing valve 35 from the first connecting portion 38, while the water from the bypass conduit 33 is supplied to the second connecting portion 3.
It is introduced from 9 into the mixing valve 35. And
The mixing temperature is mixed in the mixing chamber 60, the mixing temperature is sensed by the element member 51, the case main body 52 is moved along the piston 53 by the internal expansion, the adjusting valve 45 is moved, and the temperature setting unit 55 sets the temperature. Temperature θ2
As much as possible, the lower end portion 45a of the adjusting valve 45 and the valve receiving lid 4
The distance T1 between the first receiving surface 41a and the distance T2 between the upper end portion 45b of the adjusting valve 45 and the seat surface 39a of the second connecting portion 39 is adjusted, and the inflow amount of each is limited to the set temperature θ2. The mixed hot water is supplied to the faucet 25.

The hot water from the main water heater 22 is supplied to the mixing valve 35 after the time t2, whereby the interval T1 on the side of the first connecting portion 38 is narrowed and the faucet 2
Hot water of about 45 ° C can be supplied to the 5 side, and the faucet 2
It is possible to perform hot water supply at the set temperature θ2 from the time of initial opening of No. 5 to hot water supply from the main hot water supply device 22, and in particular, the optimum hot water supply conditions are achieved in winter, which is suitable as a central hot water supply system.

Further, the open / close valve 2 is provided while tapping water from the faucet 25.
Close 5a to stop temporary use, and then open / close valve 2 again.
When 5a is opened and hot water is discharged from the faucet 25, as described above, due to the sandwich phenomenon due to the temperature characteristic in the main hot water supply device 22, the high temperature that is temporarily left in the main hot water supply device 22 from the main hot water supply device 22. No hot water is discharged, and after that, hot water whose temperature is temporarily low due to the inflowing water is discharged, but there is a height difference that causes this sandwich phenomenon in the mixing tank 28 through the bypass conduit 33. The hot water flows in, is swirled by the swirl plate 29, and is mixed well in the mixing tank 28, and the height difference due to the sandwich phenomenon is alleviated in the mixing tank 28,
Hot water with a constant temperature is discharged from the outlet side of the mixing tank 28, and even when the faucet 25 is stopped and discharged again during use, the effect of the sandwich phenomenon is well mitigated, and the constant temperature hot water is discharged from the faucet 25. As a result, the discharged hot water temperature does not fluctuate, and a comfortable use state can be obtained.

Further, when the faucet 25 is not used, the temperature drop of the element member 51 of the mixing valve 35 opens the interval T1 on the side of the first connecting portion 38 to allow the small hole 70 formed in the mixing valve 35 to pass through. The hot water of about 80 ° C from the hot water tank 30 side is the mixing tank 28.
The hot water will be naturally circulated through the mixing tank 28, the bypass pipe 33, and the inlet pipe 32.
Due to this natural circulation, it is possible to favorably prevent generation of dead water in the mixing tank 28, the bypass pipe 33, and the inlet pipe 32. Further, since the mixing valve 35 narrows the interval T1 on the side of the first connecting portion 38 and closes the small hole 70 at about 45 ° C., the supply of hot water to the mixing tank 28 side is interrupted at about 45 ° C. The inside of the mixing tank 28 will always be well maintained at a hot water temperature of about 45 ° C. Further, this small hole can also serve as a hole for draining water when it is not used for a long period of time or when the internal water is drained to protect the pipe from freezing.

Naturally, a temperature detecting sensor is attached to the bypass conduit 33, the outlet conduit 34 and a part 24a of the hot water supply conduit 24, and the operation of the mixing valve 35 is controlled by a mixing valve having an electric motor. Is also good.

[0024]

According to the present invention, as described above, the mixing valve is arranged at the confluence of the outlet pipe of the immediate hot water tank and the bypass pipe of the hot water supply pipe. Since it can follow the seasonal change) and the temperature change of the hot water in the hot water tank, the hot water can be supplied at a constant temperature within a set range from the initial opening of the faucet.

Further, since the mixing tank is provided in the bypass pipe upstream of the mixing valve, when the faucet is stopped during use, and then the faucet is opened again for re-discharging, a high or low level generated on the water heater side is generated. The hot water that causes the sandwich phenomenon with a difference can be mixed well in the mixing tank and discharged from the faucet as a constant hot water temperature, and there is no fluctuation in the hot water temperature when the faucet is stopped once during use and re-discharged. , Good use condition can be obtained.

Further, since a swirl plate for swirling water flowing into the mixing tank is provided in the mixing tank, the hot water having a height difference which causes a sandwich phenomenon in the mixing tank can be swirled well. By mixing, it is possible to surely reduce the height difference of the hot water.

Further, since the mixing valve is formed with a small hole for circulating the hot water from the immediate hot water tank to the mixing tank, the hot water is circulated from the immediate hot water tank to the mixing tank through the small hole. This has the effects of preventing the generation of dead water satisfactorily, and maintaining the inside of the mixing tank at a constant temperature at all times to maintain a good tapping condition.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a hot water supply device.

FIG. 2 is a sectional view of a mixing valve.

FIG. 3 is a cross-sectional view illustrating the operation of the mixing valve.

FIG. 4 is an internal structural diagram of a mixing tank.

FIG. 5 is a perspective configuration diagram of a swivel plate provided inside a mixing tank.

FIG. 6 is a temperature characteristic diagram of a main part.

FIG. 7 is a configuration diagram of a conventional hot water supply device.

FIG. 8 is a configuration diagram of a conventional control valve.

FIG. 9 is a path diagram of a conventional hot water supply main part.

FIG. 10 is a temperature characteristic diagram of a conventional main part.

FIG. 11 is an explanatory diagram of a sandwich phenomenon due to a temperature characteristic in the main water heater.

[Explanation of symbols]

 21 Hot Water Supply Device 22 Main Hot Water Supply Device 23 Water Supply Pipeline 24 Hot Water Supply Pipeline 25 Faucet 28 Mixing Tank 29 Swing Plate 30 Immediate Hot Water Tank 32 Inlet Pipeline 33 Bypass Pipeline 34 Outlet Pipeline 35 Mixing Valve

Claims (4)

[Claims] 1. A hot water supply device in which an immediate hot water tank is provided in a hot water supply pipe of a main hot water supply device, and a mixing valve is provided at a confluence of an outlet pipe of the immediate hot water tank and a bypass pipe of the hot water supply pipe. Hot water supply device configured to do. 2. The hot water supply apparatus according to claim 1, wherein a mixing tank is provided in the bypass pipe upstream of the mixing valve. 3. A swirl plate for swirling water flowing into the mixing tank is provided inside the mixing tank.
Hot water supply device according to. 4. The water heater according to claim 2, wherein the mixing valve has a small hole for circulating hot water from the immediate hot water tank to the mixing tank.