JPS6211271B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an instantaneous water heater for centralized hot water supply.

In general, hot water is used at home for Western-style bathing, Japanese-style bathing, shower bathing, washing, washing hands, washing dishes, etc.
There are tasks such as wiping and washing, and the appropriate temperature, desired outflow rate, and hot water supply time are different, and these hot water supplies may be performed at two or three locations at the same time.

For example, in a Western-style bath, hot water at a temperature of 50°C and a flow rate of 30/min is poured at the tap for 3 to 3 minutes.
It is necessary to supply water for 4 minutes, and if the water temperature is 50℃ from the water heater.
If hot water is to be delivered, the diameter of the hot water pipe and the faucet must be 25 mm, so normally the water supply temperature is raised to around 70°C and the pipe diameter is set to 20 mm, while at the same time the faucet is turned into a mixer faucet. There is. Also, even in the case of Japanese-style bathing (although it is a drop-in type), the hot water temperature must be at least 60°C to provide hot water when the bath water has cooled down. On the other hand, for example, when washing dishes, the temperature is around 40℃.
Hot water is supplied by repeating hot water at a flow rate of 10/min within 1 minute. (A pipe diameter of 15 mm is sufficient.) Based on the usage conditions described above, a fairly large instantaneous water heater is required as a water heater that does not cause any inconvenience when using the centralized hot water supply system. Therefore, in the past, a water heater with a capacity of size 16 or higher was required to be able to easily supply hot water to another area at the same time as pouring water into the shower or bathtub.

Recently, systems that change the combustion amount in stages to accommodate seasonal changes in water temperature, and systems that proportionally control the amount of gas to maintain a constant water temperature even if the amount of hot water used have been put into practical use. However, both methods have a performance problem in that there is a limit to how much the burner can burn, and when the burner is throttled down, the thermal efficiency decreases. Furthermore, when simultaneously supplying hot water to applications with different hot water temperatures and quantities, it is not only impossible to satisfy actual usage conditions unless hot water is always supplied at a high temperature and all hot water supply taps are mixed taps. However, gas and water become uneconomical in applications where relatively low temperatures and small quantities are sufficient. Furthermore, even if advanced technologies such as proportional gas control, automatic control using a microcomputer, or adoption of electronic control priority circuits are incorporated, the mechanism becomes complex and hot water can be freely obtained at the appropriate temperature and amount from multiple locations. The reality is that this is not possible.

A known technology that can accommodate the use of hot water in different hot water applications requiring different amounts of hot water includes a water heater as shown in FIG. (Refer to Utility Model Publication No. 46-22292).

This water heater includes multiple small-sized stop-start water heaters A,
The water supply pipes f ₁ , f ₂ , f ₃ of B and C are each connected to a check valve V ₁ ,
They are connected by a connecting pipe g via _V2 , so that only the water heaters corresponding to the amount of hot water used by each of the hot water taps a, b, and c are operated. That is,
If hot water tap a is opened, only water heater A will operate and the amount of hot water will be supplied according to the capacity of water heater A. If hot water tap b is opened with hot water tap a closed, water heaters A and B will be supplied. When activated, the amount of hot water in A and the amount of hot water in B are added together and hot water is supplied.
Hereinafter, the same effect will be applied to the hot water tap c. However, even if hot water taps c or b are opened, the above effect will be canceled if hot water tap a is opened at the same time, so not only can they not be used simultaneously, but the hot water temperature at each hot water tap must be changed. The disadvantage is that it cannot be done.

The present invention is applicable to the case where when a certain tap out of a plurality of hot water taps with different hot water temperatures and required amounts is opened, the taps are not affected by the operation of other hot water taps, in other words, they are used simultaneously. The present invention also provides a hot water supply device that can obtain any desired hot water temperature and amount from its hot water tap.

An embodiment of the present invention will be described below with reference to the drawings.

Figures 2 to 6 show examples of water heaters in which two sets of water heaters are housed in one enclosure and their hot water supply pipes are associated; Figure 2 is a schematic configuration diagram of the water heater; 3 to 5 are hot water supply system diagrams for explaining the operation of the above device, and FIG. 6 is a hot water supply system diagram of another embodiment.

In the figure, reference numeral 1 denotes a housing for a water heater, inside which two sets of instantaneous water heaters A, B or A, B' are equipped with heat absorbing parts 2, 6 and burners 3, 7, and the necessary gas. It houses the supply mechanism, water supply mechanism, and electrical control mechanism. The burners 3 and 7 are introduced into the enclosure 1 from the same gas supply source through a supply pipe 10 and are supplied with gas through branch pipes in which gas governors 5, 9 and automatic gas valves 4, 8 are interposed, respectively. It goes without saying that this gas supply mechanism is the same as a normal instantaneous water heater, and includes a burner ignition device and a flame monitoring device (not shown). The water supply and hot water supply mechanism includes a water supply pipe 11, branch water pipes 13, 14, hot water supply pipes 17, 18, 19, communication pipes 22, 23, 24, a running water switch 12 interposed in the water supply pipe 11, and the branch water pipes 13, 14.
It consists of flow rate sensors 15 and 16 installed in the hot water supply pipes 17 and 18, respectively, and hot water temperature sensors 20 and 21 installed in the hot water supply pipes 17 and 18, respectively, and this mechanism is also used in ordinary instantaneous water heaters. be. E,F,
G, H, I, and J are electromagnetic on-off valves (hereinafter simply referred to as valves), which are used to connect hot water taps a, b, and c at various locations where hot water is used.
They are opened and closed individually or in conjunction with the operation of the device, or by remote control from that location. 25
controls the valves E to J, the water flow switch 12, the flow rate sensors 15, 16, and the hot water temperature sensors 20, 2.
This is an automatic controller that opens and closes the automatic gas valves 4 and 8 based on the detection signal of 1 and adjusts the amount of gas passing through the automatic gas valves 4 and 8 according to a remotely selected setting value.

In the embodiments shown in FIGS. 2 to 5, water heaters A and B have the same capacity, and in the embodiment shown in FIG. 6, water heater B' has a larger capacity than water heater A. It is assumed that the

Next, the operation of the embodiment configured as described above will be explained.

In Figure 2, if you want to get hot water from hot water tap a, set the hot water temperature using the remote control unit located at that location, close valve E and open valve F, and then turn on hot water tap a. When opened, a flow of water occurs in the water supply pipe 11, branch water pipe 13, and hot water supply pipe 17, which activates the water flow switch 12, opens the automatic gas valve 4, and sends gas to the burner 3, which sends the gas to the ignition means (not shown). Therefore, the burner 3 starts combustion, only the water heater A operates, and hot water of its capacity is obtained at the hot water tap a. At this time, the flow rate sensor 15 detects the selected adjustment amount of the hot water output by the hot water tap a, and the hot water temperature sensor 20
The controller 25 detects the hot water temperature and adjusts the combustion amount of the burner 3 so that hot water is supplied at the desired temperature with the desired amount of hot water.

In this case, the small hot water supply system path is shown by the solid line arrow in FIG.

Next, if you want to get hot water from hot water tap b, set the hot water temperature using the remote control unit located at that location, close valve E and open valve G, and then open hot water tap b. As in the case described above, only the water heater B is operated and the hot water tap b is supplied with its capacity.

Flow rate sensor 16, hot water temperature sensor 21, controller 25
The effect is the same as above. In this case, the water supply system path is shown by the broken line arrow in FIG.

As explained above, by closing valve E, hot water is supplied based on the operation of independent water heaters A and B only through the system path to which the water heaters belong, so hot water taps a and b are opened at the same time. When the taps are turned on, hot water comes out from both taps, so they can be used at the same time.

Next, if you want to get a large amount of hot water from the hot water tap a, set the desired hot water temperature using the remote control unit at that location, open valves E and F, and close valve G. If you open the hot water tap a, the running water switch 1 will turn on.
2 is activated, both water heaters A and B operate according to the above-mentioned startup process, and hot water of the combined capacity is obtained. In this case, the water supply system path is shown by the solid line arrow in FIG. If you want to get a large amount of hot water from hot water tap b, do the same operation as above.
In FIG. 5, hot water with the combined capacity of water heaters A and B can be obtained by following the path indicated by the solid line arrow.

If you want to supply hot water to three places, as shown in FIG. All you have to do is intervene. When you want a large amount of hot water from the hot water tap c, you close valves F and G and open valves E and J. When you open the hot water tap c, the system follows the path shown by the chain arrow to the water heater. Hot water with the combined capacity of A and B can be obtained.

Next, the operation of another embodiment, that is, an apparatus in which (capacity of A)<(capacity of B'), will be described below based on the hot water supply system diagram shown in FIG. In order to simplify the explanation, the capacity of water heater A is assumed to be No. 5, and the capacity of water heater B' is assumed to be No. 10, and other operations will be omitted, and the valve operations and hot water supply operation will be described.

If valves E, G, H, and I are closed and F is opened, hot water with a capacity of No. 5 will come out from hot water tap a, and valves E, F, G,
If you close valve I and open valve H, you can get hot water with a capacity of No. 10, and if you close valves G, H, and I and open valves E and F, you can get hot water with a capacity of No. 15. Similarly, from hot water tap b, if valves E, F, G, and H are closed and valve I is opened, hot water with the capacity of No.
If you open it, you can get hot water with the ability of No. 10. hot water tap a
If you open taps and b at the same time, that is, if you use two places at the same time, close valves E, H, and I and open valves F and G. Hot water with capacity No. 5 will come out from hot water tap a and hot water from hot water tap b.
You can get hot water with the capacity of No. 10 at the same time, and valve E,
If F and G are closed and valves H and I are opened, hot water with a capacity of No. 10 can be obtained from hot water tap A, and hot water with a capacity of No. 5 can be obtained from hot water tap B.

As described above, in the hot water supply device of the present invention, when a certain tap out of a plurality of hot water taps is opened, hot water of any desired hot water temperature and quantity can be obtained regardless of the operation of other hot water taps. Not only is it possible to use hot water with different hot water temperatures and different amounts of hot water at the same time, but the hot water output capacity of the hot water taps can be interchanged, making it extremely practical for centralized hot water heating.
This contributes to resource and energy conservation.

In the above-mentioned example, two sets of water heaters are installed side by side within the casing, but the technical idea of the present invention is not limited to this, and it is possible to install many sets of water heaters side by side. It goes without saying that this also makes it possible to install more hot water taps and obtain hot water with a wider variety of capacities from those hot water taps.

[Brief explanation of the drawing]

Fig. 1 is a hot water supply system circuit diagram showing a water heating device of the prior art, Fig. 2 is a schematic configuration diagram showing an embodiment of the water heating device according to the present invention, and Figs. System Diagram, FIG. 6 is a hot water supply system diagram illustrating the operation in another embodiment. 1... Enclosure, 2, 6... Heat absorption part, 3, 4... Burner, 4, 8... Automatic gas valve, 5, 9... Gas governor, 10... Gas supply pipe, 11... Water supply pipe, 1
2... Flowing water switch, 13, 14... Branch water pipe,
15, 16...Flow rate sensor, 17, 18, 19...
...Hot water pipe, 20, 21...Water temperature sensor, 22, 2
3, 24...Connection pipe, 25...Automatic controller, A,
B, B'... Water heater, E, F, G, H, I... Solenoid shut-off valve, a, b, c... Hot water tap.

Claims (1)

[Claims] 1. Leading out hot water supply pipes from a plurality of water heaters that are supplied with water by a common water supply pipe, connecting the hot water supply pipes with each other through a communication pipe, and interposing an on-off valve in each of the hot water supply pipe and the communication pipe. Further, various detection elements for automatically controlling the operation of the water heater are interposed in the water supply system line, and the opening/closing valve is opened and closed based on the designation of the hot water supply line from the hot water supply piping destination; A central hot water supply system characterized by being equipped with an automatic controller that can remotely control gas supply to a burner and adjustment of hot water temperature and quantity.