JP2003161529A - Hot water temperature keeping apparatus for hot water supply facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To keep the hot water temperature substantially constant in a hot water supply facility even in the intermittent use of the hot water supplied from a water heater in bathroom shower, at a bathroom shower, kitchen water, and other hot water supply points, and also to extremely simplify the facility. <P>SOLUTION: This apparatus comprises a casing 1, an inflow part 2 for carrying the hot water passed through a heating part 5a into the casing, and an outflow part 3 having an outflow opening 3a located above the near center in the height direction within the casing 1. The casing 1 stores the hot water up to the position of the outflow opening 3a. <P>COPYRIGHT: (C)2003,JPO

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 facility in which hot water supply from a water heater is almost constant even when it is used intermittently in bathroom showers, kitchen water taps and other hot water supply locations. The present invention relates to a hot water temperature maintaining device for hot water supply equipment, which can maintain the hot water temperature and can make the equipment extremely simple.

[0002]

2. Description of the Related Art In recent years, hot water supply equipment centering on a water heater has been widely used in detached houses, apartments, condominiums, commercial buildings and the like. Such hot water supply equipment can use hot water while keeping a desired temperature constant from the water heater. In this way, the hot water supply equipment can enjoy a rich living environment because the hot water supply to the bathroom, shower, kitchen or laundry room can be used stably throughout the year.

[0003]

In the above hot water supply facility, when hot water is continuously used, the hot water can be used at a constant hot water temperature during the continuous use. However,
In some cases, hot water may be used intermittently. These are cases where the purpose is to eliminate water waste and save water. Such cases are, for example, when using a shower or when washing dishes in the kitchen.

In such a case, the hot water supply is often stopped during use of the hot water supply. For example, when the hot water supply is once stopped during hair washing, or when the dishes are washed, the washed dishes are wiped with a cloth. , This is the case when the hot water supply is stopped once. In this way, the intermittent use of hot water is often done on a daily basis. The problem of intermittent use of hot water supply is when the hot water supply is stopped for a relatively long time. That is, even when the hot water supply is used intermittently, if the hot water supply stop time is short and almost instantaneous, it can be used at a constant hot water temperature almost the same as during continuous use.

However, in the intermittent use of the hot water supply, when the hot water supply stop time is relatively long, for example, when the hot water supply stop time is about 2 minutes to about 10 minutes, when the hot water supply is restarted, the hot water is initially hot. It suddenly comes out, and then cold water comes out for a certain period of time. This phenomenon of temperature change is usually called "cold water sandwich phenomenon".
This depends on the length of the pipe from the water heater to the shower, faucet, etc., but in intermittent use of hot water supply, immediately after hot water supply is stopped, there is a slight delay due to the time difference due to the stop command to the heating unit such as the gas burner. After that, the hot water remaining in the water heater continues to be heated, so that the hot water remaining in the water heater becomes even hotter.

Next, when resuming hot water supply, first, the above-mentioned hot water is pushed out and sent to water appliances such as showers and faucets, and extremely hot water is temporarily discharged from these water appliances. It will be. Next, even if the hot water supply is restarted,
This time, the heating part of the water heater will be ignited with a slight delay, and a time difference, that is, a time lag, will occur until a stable heating operation. Due to this time difference, unheated water flows in the water heater, and cold water is sent to the shower or the faucet as it is. Therefore, as described above, when the hot water supply is used intermittently in the shower or kitchen faucet, the hot water temperature may not be constant depending on the stop time, which may cause discomfort when using the water appliance. I may feel.

For this reason, in order to make the hot water temperature constant by intermittent use of hot water supply, there is a system in which a control mechanism is incorporated in a pipe of hot water supply equipment and the hot water temperature is made constant by electronic control. These are equipped with a hot water temperature sensor, a solenoid valve, a thermostat, and a control unit for appropriately controlling these. However, such equipment is extremely expensive, has a complicated structure due to the existence of a large number of constituent members, and requires maintenance with specialized knowledge, which causes maintenance costs. As described above, an object of the present invention is to keep the hot water temperature constant even if the hot water supply is intermittently used, and to make the structure extremely simple.

[0008]

Therefore, as a result of intensive studies, the inventor of the present invention has found that the present invention allows a casing and a hot water passing through a heating portion to flow into the casing. Maintaining the hot water temperature of a hot water supply facility, which comprises an inflow part and an outflow part having an outflow opening located above substantially the center in the height direction inside the casing, wherein the casing is capable of storing hot water up to the position of the outflow opening. By using the water heater, the hot water supply from the water heater maintains a substantially constant hot water temperature even when the hot water is used intermittently in bathroom showers, kitchen water taps, and other hot water supply locations. The above problems can be solved and the equipment therefor can be made extremely simple.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The hot water temperature maintaining device of the present invention constitutes hot water supply equipment. The structure of the present invention is mainly located above the casing 1 and the inflow part 2 that is connected to the water heater 5 and allows hot water to flow into the casing 1, and above the center of the inside of the casing 1 in the height direction. , An outflow portion 3 having an outflow opening 3a for sending hot water from inside the casing 1 to the outside of the casing 1. The inflow part 2 and the outflow part 3
Is further composed of a plurality of members.

There are various embodiments of the present invention.
First, the first embodiment will be described. The casing 1 is in the form of a tank having airtightness, and is capable of temporarily storing hot water supplied from the water heater 5. Such a casing 1 is made of metal, and is shown in FIGS. 1 and 2 (A).
As shown in, it has a substantially rectangular parallelepiped shape. The casing 1 may be made of heat-resistant synthetic resin, pottery, or the like other than metal, but is preferably durable and shock-resistant.

Specifically, the casing 1 is a main body 1
It is composed of a and a cover portion 1b. The main body 1a
The cover 1b and the cover 1b are made watertight by a fastener 1c such as a bolt and a packing material 1d such as rubber. More specifically, a connecting flange portion 1a ₄ is formed around the opening side of the main body portion 1a, and the connecting flange portion 1a ₄ is formed.
a ₄ has a plurality of connection holes 1a ₅ , 1a ₅ , at predetermined intervals,
... is formed. An internal screw may be formed in the connection hole 1a ₅ . Then, the connection flange portion 1
a ₄ and in the packing material 1d is sandwiched between the cover portion 1b, and the main body portion 1a and the cover 1b is fixed by fastener 1c.

The casing 1 has a structure shown in FIG.
As shown in (B), the inflow part 2 and the outflow part 3 are provided, respectively. The inflow part 2 is, as shown in FIG.
It serves as an inlet for the hot water supplied from the water heater 5 to flow into the casing 1. In addition, the outflow portion 3 serves as a portion that sends the hot water that has flowed into the casing 1 to the outside of the casing 1 and supplies the hot water to a water appliance 8 such as a shower fixture or a faucet. The structure of the inflow part 2 is composed of an internal inflow pipe 2b and an inflow joint part 2c for fixing the internal inflow pipe 2b to the casing 1 and connecting with a pipe from the water heater 5.

[0013] First, inlet 2, Figs. 1 (A), (B), the said is mounted on top 1a ₁ of the casing 1, an internal inlet tube 2b to the inside from said top 1a ₁ inflow It is fastened and fixed via the joint portion 2c. The internal inflow pipe 2b is mounted so that the axial direction is substantially vertical. The inflow opening 2a, that is, the lower end of the internal inflow pipe 2b is located below the substantial center of the casing 1 in the height direction. More specifically, it is preferable that the lower end of the internal inflow pipe 2b, which is the inflow opening 2a, is close to the bottom portion 1a ₂ of the casing 1.

[0014] Next, the outflow part 3, the being mounted on the bottom 1a ₂ of the casing 1, the upper surface of the bottom portion 1a _2, namely the bottom 1a ₂ from the internal outlet pipe 3b in the inner casing 1
Are mounted via the inflow joint portion 3c so as to be substantially vertical. The outflow opening 3a, that is, the lower end of the internal outflow pipe 3b is located above the substantially center of the casing 1 in the height direction. Here, the substantially center in the height direction of the casing 1 includes a position slightly below the center. Internal outflow pipe 3b which is the outflow opening 3a
It is preferable that the upper end of is close to the top 1a ₁ of the casing 1.

The inflow portion 2 and the outflow portion 3 have an indirect positional relationship in the casing 1. That is, as shown in FIGS. 1 (A) and 1 (B), when the hot water that has flowed in from the inflow part 2 once enters the casing 1 and the water level reaches the position of the outflow opening 3a and exceeds that position. The structure is such that hot water flows out from the outflow portion 3. In other words, the hot water from the water heater 5 flows into the casing 1 via the inflow part 2 side and is stored in the casing 1, or from the outflow part 3 side via the casing 1. The water flows out and supplies hot water to the water appliance 8 through the pipe 7.

That is, the inflow part 2 and the outflow part 3 are indirectly connected via the casing 1, and even if the inflow part 2 and the outflow part 3 are not connected, It does not include a structure in which hot water that flows in is not stored in the casing 1 or that most of it flows directly into the outflow portion 3 without passing through the inside of the casing 1.

When the hot water from the water heater 5 flows into the casing 1 through the inflow portion 2, the hot water is stored in the casing 1 up to the position of the outflow opening 3a of the internal outflow pipe 3b. When the water level of the hot water is equal to or exceeds the position of the outflow opening 3a, the hot water flows out of the outflow portion 3 to the outside of the casing 1, and the hot water can be supplied to a water supply device 8 such as a shower device or a faucet. it can. In this way, a predetermined amount of hot water supplied from the water heater 5 can be stored in the casing 1.

The internal inflow pipe 2b and the internal outflow pipe 3b
Specifically, a pipe having a circular cross section is used. Although metal pipes are mainly used for these, synthetic resin pipes such as vinyl chloride pipes may be used. Further, the internal inflow pipe 2b and the internal outflow pipe 3b are fixed to the inflow joint portion 2c and the outflow joint portion 3c by screws, but other fixing means such as press fitting, adhesive, welding or the like is used. May be. The inflow joint portion 2c fixes the internal inflow pipe 2b in the casing 1 as described above, and includes the support portion 2c ₁ and the communication portion 2c ₂ .

The supporting portion 2c ₁ is a portion for fixing and supporting the internal inflow pipe 2b to the casing 1, and FIG.
As shown in mainly two flange-like member 2c _11, 2c
It made ₁₂ has a structure which is fixed by sandwiching the top portion 1a ₁ vertically. Also, two flange-shaped members 2c
_A packing material 2c ₁₃ is mounted between the ₁₁ , 2c ₁₂ and the top portion 1a ₁ so as to have watertightness.

The top portion 1a of the casing 1₁Formed into
The supporting portion 2c in the formed through hole.₁Is mounted, and the supporting portion 2c
₁The internal inflow pipe 2b is attached via the. In particular,
The support part 2c₁An internal screw is formed in the internal inflow pipe 2b
An external screw is formed on the support portion 2c.₁And internal inflow pipe 2b
It has a structure in which and are screwed together. Also, the support portion 2c ₁
The communication part 2c₂Is installed. The communication part 2
c₂Is a part connected to the pipe from the water heater 5.

The communicating portion 2c ₂ of the inflow joint portion 2c
As shown in FIG. 1C, the adapter 2c ₃ is attached to the. The adjusting pipe 10 corresponding to various pipe sizes can be attached to the adapter 2c ₃ . The adapter 2c ₃ is in the shape of a cap nut, has an inner screw formed on the inner circumference, and is rotatably fixed to the communication portion 2b ₂ by a retaining ring 2c ₄ or the like. The adjusting tube 10 has a cylindrical shape and has an outer screw 10a and an inner screw 10 for adjusting.
b is formed. The adjusting tube 10 has an inner screw 1
By aligning the inner diameter of 0b with various sizes, it becomes possible to connect with the hot water supply pipe 6 having various screw sizes.

The inflow joint portion 3c is shown in FIG.
(B), as shown in FIG. 2, etc., the internal outflow pipe 3b is fixed in the casing 1, and the internal inflow pipe 2
The supporting portion 3c ₁ and the communicating portion 3c are similar to the supporting structure of FIG.
It consists of ₂ and. The support portion 3c ₁ is a portion that fixes and supports the internal outflow pipe 3b to the casing 1.

The supporting portion 3c ₁ has almost the same structure as that of the inflow joint portion 2c, and as shown in FIG. 2 (A), it comprises two flange-shaped members 3c ₁₁ and 3c ₁₂ , and the bottom portion 1a ₂ It is structured such that it is fixed by sandwiching it vertically. Also between the two flange-like member 3c _11, 3c ₁₂ and the bottom 1a ₂ packing material 3c ₁₃ is mounted, it is assumed to have a watertight. Further, although not particularly shown, an adapter, an adjusting pipe 11 and the like are attached to the communication portion 3c ₂ on the outflow joint portion 3c side as needed, similarly to the inflow joint portion 2c side, so that the pipes 7 of various sizes can be connected. It is also possible to have a structure that can be applied.

The bottom 1a of the casing 1₂Formed into
The supporting portion 3c in the through hole₁Is mounted, and the supporting portion 3c
₁The internal outflow pipe 3b is attached via the. In particular,
The support part 3c₁An internal screw is formed in the internal outflow pipe 3b
An outer screw is formed on the support portion 3c.₁And internal outflow pipe 3b
It has a structure in which and are screwed together. Also, the support portion 3c ₁
With respect to the communication part 3c₂Is installed. The communication part 3
c₂Is for shower equipment, faucet, etc.
Connect to the pipe to supply to. Communication part 3c₂I also mentioned above
Various fitting sizes are installed according to the piping size.
It has become possible. 6 is the first embodiment
FIG. 2 is a schematic view of a state in which hot water flows from the water heater 5 through the inflow part 2.
It flows in and the water level in the casing 1 reaches the outflow opening 3a.
Then, the hot water flows from the casing 1 to the water equipment 8.
Shows.

Next, in the second embodiment of the present invention, as shown in FIG. 7, the internal inflow pipe 2b described in the first embodiment is not used in the inflow section 2. That is, only the support portion 2c ₁ and the communication portion 2c ₂ are mounted on the top portion 1a ₁ of the casing 1. Further, in this embodiment, the inflow opening 2a is formed substantially flush with the lower surface of the top portion 1a ₁ . Also in this embodiment, as described above, the mutual positional relationship between the inflow portion 2 and the outflow portion 3 is such that the positions do not match in the vertical direction. Also in this structure, the hot water that has flowed in from the inflow portion 2 once enters the casing 1, and after the water level reaches the position of the outflow opening 3a, the hot water can flow out from the outflow portion 3.

Next, in the third embodiment of the present invention, as shown in FIG. 8, the inflow portion 2 is a side surface portion 1a of the casing 1.
_It was established in ₃ . In this case, the position of the inlet 2, the suspension can be any position in the height direction of the side portion 1a _3, it is preferably connected above substantially the center in the height direction of the side portion 1a ₃ downward position It is something. In this embodiment, the inflow portion 2 is mounted near the bottom portion 1a ₂ of the casing 1, and the inflow joint portion 2c is mounted on the bottom portion 1a ₂ . Further, the internal inflow pipe 2b is attached if necessary. In this embodiment, the inflow part 2 is
It is located on the side surface portion 1a ₃ of the casing 1, and when the hot water flows from the water heater 5, the hot water flows laterally inside the casing 1 to form convection, which is advantageous in that the hot water temperature can be easily kept constant.

Next, FIG. 9 shows a fourth embodiment of the present invention.
As shown in FIG. ₃ , the inflow portion 2 is provided in the bottom portion 1a ₂ of the casing 1. Also in this case, the internal inflow pipe 2b is mounted as necessary, but the internal inflow pipe 2b
When using, the position of the inflow opening 2a is
It is determined by the length of b. Preferably the inflow opening 2
The height position of a is preferably set lower than the outflow opening 3a.

Next, as a fifth embodiment of the present invention, as shown in FIG. 10, the outflow portion 3 is provided on the side surface portion 1a ₃ of the casing 1. In this embodiment,
It is necessary that the outflow portion 3 is located above substantially the center of the side surface portion 1a _{3 in} the height direction. In this embodiment, the outflow portion 3 includes only the inflow joint portion 3c and the inner outflow pipe 3b.
Is not particularly required, but the internal outflow pipe 3b may be mounted.

Next, as a sixth embodiment of the present invention, as shown in FIG. 11, a partition wall 3d is formed near the outflow portion 3 side of the casing 1. The upper end of the partition wall 3d is located substantially above the center in the height direction of the casing 1, and an outflow opening 3a is formed between the upper end of the partition wall 3d and the top 1a ₁ of the casing 1. become. The partition wall 3d is made of the same material as the casing 1 and is made of a metal plate or the like, or is made of synthetic resin.

The body portion 1 of the casing 1 described above
When the casing 1 is composed of a and the cover portion 1b,
The partition wall 3d is configured to contact the main body portion 1a and the cover portion 1b in a watertight manner so that the hot water does not leak from any place other than the outflow opening 3a. The partition wall 3d is joined to the main body portion 1a side or the cover portion 1b side of the casing 1 by welding means, adhesive agent or other watertight means. In the sixth embodiment, the region surrounded by the partition wall 3d and the casing 1 functions as the same as the internal outflow pipe 3b, the internal outflow pipe 3b is unnecessary, and the casing 1 has an inflow joint. Only the portion 3c needs to be attached.

The shape of the casing 1 in each of the above-described embodiments is a cubic shape such as a substantially rectangular parallelepiped shape as shown in the drawing, but the shape is not necessarily limited to such a shape and may be any other shape as necessary. Then, the casing 1 can be formed into a cylindrical shape, a spherical shape, a capsule shape, or the like. Even in this case, the inflow part 2 and the outflow part 3 are indirect pipes. Further, the internal inflow pipe 2b and the internal outflow pipe 3b may be directly fixed to the casing 1 by welding means or the like without using the inflow joint part 2c and the outflow joint part 3c.

Next, as a seventh embodiment of the present invention, in each of the above-mentioned embodiments, a heat insulating structure is provided so that the casing 1 has a heat retaining property.
As its specific structure, there are mainly two types, and as the first type, as shown in FIG. 12 (A), the casing 1 is a double-layered structure including a main body portion 1a and an outer layer portion 1f. It is formed into a plate structure, or its body 1a
In some cases, a heat insulating material 1e having a heat insulating property such as glass wool or foamed synthetic resin is internally or filled as the interior heat insulating material 1e _{1 in the} double plate of the outer layer portion 1f. The outer layer portion 1f
Is slightly larger than the main body 1a and has substantially the same shape. Further, the cover portion 1b also has a double plate structure, and the interior heat insulating material 1e ₁ is internally or filled.

Further, as the second type of the seventh embodiment, as shown in FIG. 12B, the outside of the casing 1 is configured to be held by the heat insulating material 1e.
In this case, the heat insulating material 1e is formed of glass wool, foam synthetic resin, pottery, cloth or the like in the form of a casing,
Alternatively, it is used as the wrapped heat insulating material 1e ₂ formed in a sheet shape or the like. As a result, the casing 1 is wrapped in the wrapped heat insulating material 1e ₂ to form a heat insulating structure. When the heat insulating material 1e is formed in a housing, a mold is used to form a mold with various curing agents and the like, and the casing 1 is inside the mold.

With such a structure, the casing 1 is prevented from being affected by the outside air temperature even in a cold region, whereby the temperature of the hot water stored in the casing 1 is kept substantially constant, or The change in hot water temperature can be minimized. As a result, even in intermittent use of the water heater 5 in cold regions, a stable hot water temperature can be provided and a comfortable hot water supply can be achieved. Further, the water heater 5 may be a normally used one, and a heating portion 5a such as a gas burner for heating the internal piping and the water flowing in the internal piping.
Is equipped with, including this heating unit 5a, various sensors,
Various components such as valves are covered with the cover body 5b.

Further, as shown in FIG. 13, there is an embodiment in which the hot water temperature maintaining device of the present invention is incorporated in the water heater 5. Specifically, the water heater internal pipe 5c that passes through the heating unit 5a such as the gas burner incorporated in the water heater 5 described above is connected to the inflow portion 2 of the water temperature maintenance device, and the water temperature maintenance device is It is housed in the cover body 5b of the water heater 5. By this, the hot water temperature maintaining device of the present invention is installed inside the water heater 5, so that the hot water supply equipment is compactly assembled,
In addition, installation work can be done easily, and space saving can be made extremely advantageous.

[0036]

First, in the hot water temperature maintaining device of the present invention, the inflow portion 2 is connected to the water heater 5 via the hot water supply pipe 6. At this time, in the connection between the inflow portion 2 and the hot water supply pipe 6, as the communication portion 2c ₂ of the inflow joint portion 2c, an appropriate one corresponding to the size of the hot water supply pipe 6 is selected and used. Further, the outflow portion 3 of the hot water temperature maintainer and a water appliance 8 such as a shower or a tap are connected via a pipe 7.

First, when the hot water supply operation of the cock (water faucet) of the water appliance 8 is started, the heating unit 5a such as a gas burner is started in the water heater 5 to start the water heating and the hot water supply pipe 6 is connected. Hot water is supplied from the inflow portion 2 of the hot water temperature maintaining device of the present invention into the casing 1. Casing 1 of the hot water temperature maintainer
The hot water that has flowed in from the inflow section 2 flows into the outflow opening 3 of the outflow section 3.
Hot water accumulates in the casing 1 until the position a is reached.

When the water level of the hot water in the casing 1 increases and exceeds the outflow opening 3a, the hot water flows out of the outflow opening 3a.
a, and starts to flow out of the casing 1 through the outflow opening 3a. At this time, if the internal outflow pipe 3b is attached, the hot water flows out of the casing 1 through the internal outflow pipe 3b. Casing 1 like this
As shown in FIG. 3, the hot water flowing out of the water flows through pipes 7 to eight places of water supply equipment such as showers and faucets. In this state, the water appliance 8 is normally used.

Next, the case of intermittent use in which hot water from the water supply device 8 is repeatedly used in a short time will be described with reference to FIG. In this usage state, for example, the hot water supply is repeated after a stop time of about 2 minutes to about 10 minutes where the hot water temperature may change significantly. First, FIG.
As shown in (A), the position of the outflow opening 3a in the casing 1 is the height h ₁ . In the casing 1,
In intermittent use, hot water is already stored.
The standard water level h ₂ of the stored hot water is used.

Next, when hot water supply is restarted immediately after the hot water supply of the water heater 5 is stopped and after a short stop time described above, the high-temperature hot water remaining in the water heater 5 remains in the casing 1. Sent to. Then, mix and storage hot water in the casing 1, while remaining high hot water fed from the water heater 5 is lowered to a suitable temperature, next increasing the water level h ₃ is raised the water level, this increased level h ₃ in FIG. 5 (B) As shown, it is provided to the water appliance 8 from the outflow portion 3 to the outside of the casing 1 via the pipe 7 beyond the height h ₁ of the outflow opening 3a.

Further, the ignition of the heating part 5a is started with a slight delay from the start of hot water supply of the water heater 5, and cold water which is not heated due to the ignition time delay is passed through the inflow part 2 next to the high-temperature hot water to the casing. 1 will be temporarily sent. This cold water also mixes with the hot water stored in the casing 1 so as not to cause a sudden drop in hot water temperature, and sends it to the pipe 7 at a substantially constant hot water temperature to provide the hot water at a constant temperature to the water supply device 8. Is something that can be done. As described above, the hot water temperature maintaining device of the present invention eliminates a state in which cold water suddenly comes out of high-temperature hot water immediately after restarting hot water supply in hot water supply in intermittent use of the water heater 5, and maintains a substantially constant hot water. It provides warmth.

The hot water temperature maintaining device of the present invention also serves to prevent the water hammer phenomenon. this is,
The hot water supplied from the water heater 5 is temporarily stored in the casing 1. However, even if the hot water is intermittently used, the impact caused by the water hammer due to the water pressure immediately after the start of the start-up is caused by the outflow opening 3a in the casing 1. It is absorbed by the void s generated above (see FIG. 4). This part is an air layer without hot water, and the gas expands and contracts even when pressure is applied, so that it is easy to absorb shock. As a result, vibration and shock can be prevented, and adverse effects on piping, equipment, etc. can be prevented.

[0043]

According to the invention of claim 1, the casing 1, the inflow part 2 for inflowing the hot water passing through the heating part 5a into the casing 1, and the upper part of the inside of the casing 1 substantially above the center in the height direction. The casing 1 is a hot water temperature maintaining device of a hot water supply facility capable of storing hot water up to the position of the outflow opening 3a. When these are used intermittently for a short time of about 1 to 5 minutes in the water equipment 8, etc., there is almost no change in the hot water temperature that can be experienced, and it is possible to always supply hot water at a stable hot water temperature. It is possible.

According to the second aspect of the present invention, the casing 1, the inflow part 2 which is connected to the water heater 5 and into which the hot water flows, and the upper part of the inside of the casing 1 above the center in the height direction. The casing 1 comprises a discharge part 3 having a discharge opening 3a located therein, and the casing 1 is a hot water temperature maintaining device of a hot water supply facility capable of storing hot water up to the position of the discharge opening 3a. Even in the case where the hot water supply is intermittently used in the bathroom shower, kitchen water supply and other hot water supply locations, it is possible to provide the hot water to the water appliance 8 while maintaining a substantially constant hot water temperature. There is an effect that the equipment of can be extremely simplified.

Explaining the above effect in detail, the outflow opening 3a is
The hot water is stored above the center of the inside of the casing 1 in the height direction, and the hot water can be stored up to the position of the outflow opening 3a. That is, the inflow part 2
The outlet 1 and the outlet 3 are not directly connected but indirectly connected to each other in the casing 1, and the hot water that has entered from the water heater 5 into the inlet 2 is directly connected to the outlet opening of the outlet 3. The hot water is not stored in the casing 3a but is temporarily stored in the casing 1.

Therefore, the hot water can be discharged while being mixed with the hot water stored in the casing 1 in response to a change in the hot water temperature of the hot water supplied from the hot water heater 5. In order to prevent an unstable condition that causes a sudden change in hot water temperature from hot water to cold water immediately after startup, keep the hot water temperature almost constant immediately after startup, or minimize the temperature difference even if there is a change in hot water temperature. The hot water in a stable state can be provided. As a result, it is possible to comfortably perform the washing with the shower in the bathroom, the wash, the washing of the hair, and the work of the kitchen tap. Further, in spite of the extremely excellent effect as described above, in the constitution of the present invention, the number of constituent members is small, the structure can be made extremely simple, and it can be provided at a low price.

Further, since the hot water supplied from the water heater 5 is temporarily stored in the casing 1, a water hammer effect is obtained from the water pressure immediately after the start of the water appliance 8 despite its intermittent use. At, it is possible to eliminate, reduce, or mitigate the impact on each pipe and equipment of the hot water supply equipment. This is because the void s, which is an air layer generated above the stored water level in the casing 1, plays a role of absorbing and mitigating the impact due to the water hammer, preventing vibration and impact due to the water hammer action, and accompanying various types. It is possible to prevent adverse effects on the device.

According to the third aspect of the present invention, the casing 1, the inflow portion 2 which is connected to the water heater 5 and into which the hot water flows, and the bottom portion 1a ₂ of the casing 1 in at least the height direction. And an outflow portion 3 provided with an internal outflow pipe 3b having an outflow opening 3a into which the hot water is fed, the casing 1 being capable of storing hot water up to the position of the outflow opening 3a. The internal outflow pipe 3b by using the hot water temperature maintenance device for the hot water supply equipment
Thereby, the position of the outflow opening 3a can be set appropriately, and the configuration of the present invention can be made extremely simple.

To explain the above effect in detail, the position of the outflow opening 3a is determined by the length of the inner outflow pipe 3b, whereby the inner outflow pipe 3b is made to have an appropriate length, whereby the casing 1 The storage amount of hot water in the inside can be appropriately set, and the configuration can be the simplest.

The invention of claim 4 is the internal inflow pipe 2b according to claim 1, 2 or 3, wherein the inflow portion 2 has an inflow opening 2a located below substantially the center in the height direction of the casing 1. By using the hot water temperature maintaining device of the hot water supply equipment provided with, the hot water temperature can be made constant within the casing 1 in an extremely short time and a stable hot water temperature can be provided during intermittent use of hot water supply.

To explain the above effect in detail, when the water heater 5 is used intermittently, the hot water flowing into the casing 1 is provided so as to enter the hot water stored in the internal inflow pipe 2b. Then, it is sent into the hot water stored in the casing 1. That is, since the inflow opening 2a of the inner inflow pipe 2b is located below the water level of the hot water stored in the casing 1, the hot water discharged from the inflow opening 2a is faster than the hot water stored in the casing 1. The hot water that can be mixed and flows into the casing 1 through the inflow opening 2a hits the bottom portion 1a ₂ of the casing 1 to generate a water flow in the stored hot water, which accelerates the stirring action. As a result, mixing with the hot water stored in the casing 1 is performed more efficiently, the time when the hot water temperature becomes constant can be shortened, and the time can be made almost instantaneous. Can be provided.

According to a fifth aspect of the present invention, in the first, second, third or fourth aspect, the casing 1 is a hot water temperature maintaining device for hot water supply equipment having a heat retaining structure.
The temperature of is kept almost constant. Therefore, even in cold regions, the casing 1 is prevented from being affected by the outside air temperature, whereby the temperature of the hot water stored in the casing 1 is made substantially constant, or the change in the hot water temperature is minimized. be able to. As a result, even in intermittent use of the water heater 5 in cold regions, a stable hot water temperature can be provided and a comfortable hot water supply can be achieved.

[Brief description of drawings]

FIG. 1A is a perspective view of a hot water temperature maintaining device according to the present invention excluding a cover portion, FIG. 1B is a front view of FIG. 1A, and FIG. 1C is a partial cross section of an inflow joint portion of the hot water temperature maintaining device. Enlarged view

FIG. 2A is a vertical sectional side view of the present invention. (B) is an exploded vertical side view of (A)

FIG. 3 is a schematic diagram of hot water supply equipment using the present invention.

FIG. 4 (A) is a schematic view of a state in which the water heater and the present invention are mounted, and FIG. 4 (B) is an operation diagram of the state of preventing the water hammer phenomenon of the present invention.

FIG. 5 (A) is a schematic view showing a comparison between the water level of hot water in the casing and the height position of the outflow opening. (B) is a schematic view showing the hot water temperature maintaining structure of the present invention.

FIG. 6 is a schematic diagram of a first embodiment of the present invention.

FIG. 7 is a schematic diagram of a second embodiment of the present invention.

FIG. 8 is a schematic diagram of a third embodiment of the present invention.

FIG. 9 is a schematic diagram of a fourth embodiment of the present invention.

FIG. 10 is a schematic diagram of a fifth embodiment of the present invention.

FIG. 11 is a schematic view of a sixth embodiment of the present invention.

FIG. 12 (A) is a schematic view of a first type of a seventh embodiment of the present invention, and (B) is a schematic view of a second type of the seventh embodiment of the present invention.

FIG. 13 is a schematic view of an embodiment in which the hot water temperature maintainer of the present invention is incorporated in a water heater.

[Explanation of symbols]

1 ... Casing 2 ... Inflow section 2a ... Inflow opening 2b ... Internal inflow pipe 3a ... Outflow opening 3 Outflow section 5 ... water heater 5a ... Heating section

Claims (5)

[Claims] 1. A casing, an inflow part for inflowing hot water passing through a heating part into the casing, and an outflow part having an outflow opening located above substantially the center in the height direction inside the casing, A hot water temperature maintaining device for hot water supply equipment, wherein the casing is capable of storing hot water up to the position of the outflow opening. 2. A casing, an inflow part connected to a water heater for inflowing hot water into the casing, and an outflow part having an outflow opening located above substantially the center in the height direction inside the casing. The hot water temperature maintaining device for hot water supply equipment, wherein the casing can store hot water up to the position of the outflow opening. 3. A casing, an inflow part connected to a water heater for allowing hot water to flow into the casing, and located at least above the center in the height direction from the bottom side in the casing, and the hot water supply A hot water temperature maintaining device for hot water supply equipment, comprising: an outflow portion provided with an internal outflow pipe having an outflow opening to be fed, wherein the casing is capable of storing hot water up to the position of the outflow opening. 4. The inflow section according to claim 1, wherein the inflow section is provided with an internal inflow pipe having an inflow opening located below substantially the center in the height direction inside the casing. Hot water temperature maintainer for hot water supply equipment. 5. The hot water temperature maintaining device for hot water supply equipment according to claim 1, 2, 3 or 4, wherein the casing has a heat retaining structure.