JPH0359335B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to improving the usability of a water heater in which a terminal hot water supply port is located far away from a hot water heat source device such as a central hot water supply system.

Conventional technology Central hot water supply is commonly used because it has the effect of concentrating the heat source when hot water is supplied to multiple hot water outlets. At the beginning of use, it is inconvenient in actual use that not only does the cold water in the pipes come out, but it also takes time for hot water at a predetermined temperature to come out. As a means to eliminate such inconveniences and inconveniences, for example, Fig.
15562), a cushion tank 5 with a heat-retaining heating element 4 inside is installed in the middle of the piping 3 between the main water heater 1 and the terminal hot water supply port 2, and the piping 3 The cold water and the hot water in the cushion tank 5 are mixed and flowed out from the hot water supply port 2, so that the cold water is not directly discharged from the hot water supply port 2.

Problems to be Solved by the Invention However, the above configuration has the following drawbacks because the main hot water heat source 1 and the cushion tank 5 are directly connected through the piping 3.

(1) It is necessary to arrange the cushion tank 5 near the hot water supply port 2, and the cushion tank 5 is placed in a visible position during use, which is undesirable in terms of installation space and aesthetics.

(2) Even if the cold water in the pipe 3 mixes in the cushion tank 5, the temperature in the cushion tank 5 must not fall below the lower limit of the hot water supply temperature (30 to 40 degrees Celsius). Therefore, the capacity of the cushion tank 5 needs to be larger than the capacity of the water in the pipe 3.

(3) At the beginning of use, hot water in the cushion tank 5 will come out, but it will gradually cool down and the cushion tank 5 will cool down.
It is difficult to adjust the temperature of hot water because the hot water temperature rises again when hot water is supplied.

The present invention solves such conventional problems,
It can be installed anywhere, and the purpose is to supply hot water at a predetermined temperature immediately from the beginning of use.

Means for Solving the Problems In order to solve the above-mentioned problems, the instant hot water supply device of the present invention includes a faucet portion for dispensing mixed hot water in a hot water side flow path and a water side flow path, and a flow path for the hot water side flow path. a hot water temperature regulating throttle section that adjusts the flow rate ratio between the water amount and the water flow rate of the water side flow path;
Adjusting the total water flow rate of the hot water side flow path and the water side flow path,
A hot water flow control valve for discharging a predetermined amount of water from the faucet, a bypass section in which an upstream branch pipe and a downstream branch pipe are arranged in parallel upstream of the hot water temperature regulating throttle section on the flow path, an inlet pipe, an outlet pipe, and a heating device. An instant hot water supply device is provided at the end of the central hot water supply system, and includes a hot water storage tank and a removable connecting pipe that connects the upstream branch pipe and the inlet pipe, and further connects the downstream branch pipe and the outlet pipe.

Effects According to the present invention, with the above-described configuration, when the hot water flow rate control valve is opened, the cold water in the hot water supply piping at the beginning of use passes through the hot water side flow path and is divided into two directions at the upstream branch pipe. and the other is the upstream branch pipe,
The high-temperature hot water in the hot water storage tank flows into the hot water storage tank through the connecting pipe and inlet pipe, and is pushed out by this flowing water, flows back into the hot water side flow path through the outlet pipe, connecting pipe, and downstream branch pipe, where it is passed through the hot water side flow path. It merges with the flow in the hot water side flow path described above to create mixed hot water. This mixed hot water and the water passing through the water side flow path are adjusted to a predetermined flow rate ratio at a hot water temperature regulating throttle section, mixed at a predetermined temperature at a faucet section, and then dispensed.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

In FIG. 1, reference numeral 6 denotes an instant hot water supply device, which is connected so that hot water from the main hot water supply heat source 1 flows through a hot water supply piping 3 and is supplied to the instant hot water supply device 6, and water is supplied from a water supply piping 7. The instant hot water supply device 6 is connected to the connection port A8.
A hot water side flow path 9 connected to the hot water supply pipe 3, a water side flow path 11 connected to the water supply pipe 11 through the connection port B10, and a faucet part 12 that connects these flow paths 9 and 11 and mixes and dispenses hot water. , a hot water temperature adjusting throttle section 13 that adjusts the flow rate ratio of water flowing through the flow paths 9 and 11, and a hot water flow regulating valve 14 that adjusts the water flowing through the faucet section 12;
A bypass section 1 in which an upstream branch pipe 15 and a downstream branch pipe 16 are arranged in parallel upstream of the hot water temperature regulating constriction section 13 of the hot water side flow path 9.
7, a hot water storage tank 21 having an inlet pipe 18, an outlet pipe 19, and a heating device 20 which is an electric heater, and a connecting pipe 22 that connects the upstream branch pipe 15 and the inlet pipe 18 and the downstream branch pipe 16 and the outlet pipe 19. It consists of. The hot water temperature adjusting throttle section 13 includes a throttle valve A23 that controls the amount of water flowing through the hot water side flow path 9, a throttle valve B24 that controls the amount of water flowing through the water side flow path 10, and a thermos that detects the mixed hot water temperature of the faucet section 12. If the detected value of the thermostat 24 is higher than a predetermined value, the throttle valve A2 is
3, the throttle valve B24 is opened, and if the detected value is low, the throttle valves A23 and B24 are operated in the opposite manner to control the mixed water temperature to a predetermined value. Bypass section 17
The upstream branch pipe 15, the connecting pipe 22, the hot water storage tank 21,
In order to make the overall flow path resistance of the downstream branch pipe 16 and the flow path resistance between the upstream branch pipe 15 and the downstream branch pipe 16 of the hot water side flow path 9 approximately the same, an orifice 2 is installed in the hot water side flow path 9.
6 is installed internally. In the hot water storage tank 21, the inlet pipe 18 is inserted to the bottom of the hot water storage tank 27, and the outlet pipe 19 is provided on the top surface of the hot water storage tank, so that the high temperature hot water in the hot water storage tank is pushed up from the bottom by water injected from the inlet pipe 18. and is pushed out from the outlet pipe 19. Further, the heating device 20 is installed inside the bottom of the hot water storage tank 27, and maintains a predetermined high temperature by controlling the heater input with a hot water temperature controller (not shown). The connecting pipe 22 is provided with a connecting fitting 28 that can be detachably attached to the connecting portion. Note that the same members as in FIG. 2 are given the same numbers.

In the above configuration, when the hot water amount adjustment valve 14 is opened, the cold water in the hot water supply pipe 3 flows into the hot water side flow path 9,
The upstream branch pipe 15 divides the flow into two directions. One of the hot water flows directly through the orifice 26 of the hot water side flow path 9 to the contact point of the downstream branch pipe 16, and the other flows through the upstream branch pipe 15, the connecting pipe 22, and the inlet pipe 18 to the lower part of the hot water storage tank 27. Inside the hot water storage tank 27 is a heating device 2.
It is filled with hot water that has risen to a high temperature due to 0.
The cold water flowing in from the inlet pipe 18 pushes up the high-temperature water due to the difference in specific gravity between the hot water and the hot water and is forced out from the outlet pipe 19. This hot water flows into the hot water side flow path 9 via the connecting pipe 22 and the downstream branch pipe 16, where it merges with the flow of the hot water side flow path 9 to create mixed hot water. The flow ratio of this mixed hot water and the water flowing through the water side channel 11 is adjusted by the throttle valve A23 and the throttle valve B24 of the hot water temperature adjusting throttle section 13, respectively, and the water is mixed at a predetermined temperature from the faucet section 12. Hot water is provided. The high-temperature hot water in the hot water storage tank 21 will eventually disappear, but the high-temperature hot water from the main hot water supply heat source 1 will now flow into the hot water side flow path 9, and a suitable mixed hot water will be created downstream of the downstream branch pipe 16.

With the above configuration and operation, it is possible to stably supply a predetermined amount of hot water from the beginning.Moreover, since the flow of the hot water side flow path 9 and the hot water storage tank 21 are divided into two, the capacity of the hot water storage tank 21 is Since only 1/2 of the piping 3 is required, the installation space can be reduced and the capacity of the heating device can be reduced compared to the conventional example, which requires more than the capacity of the hot water supply piping 3. Furthermore, the surface area of the hot water storage tank is small and the amount of heat dissipated is reduced. Also, the connecting pipe 22
Since the faucet part 14 and the hot water tank 21 can be separated from each other, the hot water tank 21 can be installed in a place where it cannot be seen, such as under a kitchen sink, which is advantageous in terms of aesthetics and installation.

In the embodiments described above, the hot water volume adjustment valve 14 is provided on the downstream side of the hot water storage tank 21, which is a first stop type configuration, but the present invention also provides a first stop type configuration in which the hot water volume adjustment valve is located on the upstream side of the hot water storage tank 21. A similar effect can be obtained. Moreover, in this case, the hot water storage tank 27 can have a non-pressure-resistant structure, which increases the degree of freedom in terms of shape.

Effects of the Invention As described above, the instant hot water supply device of the present invention provides the following effects.

(1) Because the faucet and hot water storage tank can be separated by the connecting pipe, the hot water tank can be installed in places where it is hard to see or where it is not needed, such as under the kitchen sink or washbasin. The ease of installation is improved and the appearance is also improved.

(2) Since the water flowing to the hot water storage tank is separated from the hot water side flow path by a branch pipe, the capacity of the hot water storage tank can be smaller than that of the hot water supply piping, and the installation space, capacity of the heating device, and amount of heat radiation can be reduced.

(3) The time from opening the water flow control valve until hot water comes out is extremely short, making it easy to use.

(4) The hot water temperature adjusting throttle section allows the predetermined hot water temperature to be obtained immediately after hot water supply starts, so there is no need for the user to adjust the hot water temperature.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an instant hot water supply apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional instant hot water supply apparatus. 6... Instant hot water supply device, 9... Hot water side flow path, 11...
... Water side flow path, 12 ... Faucet section, 13 ... Hot water temperature adjustment throttle section, 14 ... Hot water amount adjustment valve, 15 ... Upstream branch pipe, 16 ... Downstream branch pipe, 17 ... Bypass section, 18 ... ...Inlet pipe, 19...Outlet pipe, 20...
Heating device, 21... hot water storage tank, 22... connecting pipe.

Claims (1)

[Scope of Claims] 1. A faucet unit that connects the hot water side flow path and the water side flow path and dispenses hot water, and a hot water temperature that adjusts the flow rate ratio of the water flow rate of the hot water side flow path and the water flow rate of the water side flow path. an adjustment throttle section, a hot water flow rate adjustment valve that adjusts the total flow rate of the hot water side flow path and the water side flow path, and an upstream branch pipe and a downstream branch on the upstream side near the hot water temperature adjustment throttle section of the hot water side flow path. a bypass section in which pipes are arranged in parallel; a hot water storage tank having an inlet pipe, an outlet pipe, and a heating device; a connecting pipe that connects the upstream branch pipe and the inlet pipe, and further connects the downstream branch pipe and the outlet pipe; An instant water heater equipped with 2 The hot water side flow path between the upstream branch pipe and the downstream branch pipe is
2. The instant hot water supply device according to claim 1, further comprising an orifice for adjusting the resistance in accordance with the flow path resistance on the connecting pipe/hot water storage tank side, which changes depending on the length of the connecting pipe. 3. The instant hot water supply device according to claim 1, wherein the hot water storage tank has an inlet pipe connected to the lower part, an outlet pipe connected to the upper part, and a heating device installed in the bottom part.