JPH02169959A - Hot water supply device - Google Patents

Abstract

PURPOSE:To make it possible to meet easily and instantly a requirement for hot water supply capability by constituting a hot water supply circulation system which extends from a water heater to a hot water supply section through a hot water supply circulation unit and returns to the water heater through the hot water supply circulation unit and constituting a water supply system which extends from a running water work in the hot water supply circulation unit and to the juncture. CONSTITUTION:A hot water supply circulation system H is constituted which extends from a water heater 1 to a hot water supply section 3 through a hot water supply circulation unit 2 and returns from the hot water supply section 3 to the water heater 1 through the hot water supply circulation unit 2. Further, a water supply system C which extends from the water work to the juncture P is constituted by connecting a running water pipe 15 to the running water work connection port 8 of the hot water supply circulation unit 2. With this arrangement the water heater 1 may be conventional one and its capacity can be selected as needed, and hot water supply devices of various kinds and forms can be constituted with the hot water supply unit 2 that is used in common. Here, a circulation pump 11 is controlled by the signal from flowing water detection means 16 that is provided at a suitable position on a water supply pipe 10 or it is controlled according to the difference between the signals of flow rate detection from flow rate detection means 17 provided on a hot water supply return pipe 9c and from flow rate detection means 19 provided on a water detection means 19 provided on a water supply pipe 18 of the water heater 1.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a water heater for home use and the like.

[Conventional technology]

For example, in a domestic water heater, the piping system from the water heater to the hot water supply section is conventionally classified into a single-pipe system and a multi-pipe circulation system.

A single-pipe water heater simply connects the water heater and the hot water supply section with a hot water supply pipe, and although this method has a simple configuration, even if you open the hot water outlet and start hot water supply, it will not work immediately. The drawback is that hot water at a predetermined temperature cannot be obtained and the user has to wait until the residual water in the pipes drains.

Furthermore, as shown in FIG. 3, for example, a conventional circulating type hot water supply system S includes a hot water storage tank C between a water heater a and a hot water outlet, and a hot water storage tank C between the water heater a and a hot water supply tank C. Hot water circulation systems d and d' each having circulation pumps p and p' are formed between the hot water supply section and the hot water outlet section, and a water supply pipe e connected to the water supply is connected to the hot water storage tank C. In this configuration, when the hot water is not in use, the water in the hot water storage tank C is heated by the heat exchanger f of the water heater a via the hot water circulation system d and maintained at a predetermined temperature, and the water in the hot water circulation system The water in the pipe g of d' is also maintained at a predetermined temperature by circulation.

However, immediately after opening the hot water outlet and starting hot water supply, the water in the pipe g flows out, but as mentioned above, the water in the pipe g is maintained at a predetermined temperature by circulation, so immediately after the hot water is released, the water in the pipe g flows out. You can obtain hot water at a predetermined temperature from Incidentally, during such hot water supply, the operation of the circulation pump p' of the hot water circulation system d' is stopped, and clean water corresponding to the amount of hot water is supplied from the water supply pipe e into the hot water storage tank C.

[Problems to be Solved by the Invention] As mentioned above, in the conventional circulation type water heater S, a hot water storage tank C and two circulation pumps p and p' are required.
This poses a problem in that it becomes an obstacle to miniaturization of the device and also increases cost. In addition, conventional circulation type water heater S
In this case, since the water heater a and the hot water circulation systems d and d' are designed and configured as one unit, a new design must be made for each hot water supply capacity, which makes it difficult to respond quickly to requests and increases costs. There is a problem in that it causes

The present invention aims to solve the above problems.

[Means to solve the problem]

The structure of the present invention will be explained based on FIG. 1 and FIG. 2 corresponding to the embodiment. First, the apparatus according to claim 1 includes a water heater 1, a hot water supply circulation unit 2, , hot water supply section 3
The hot water supply circulation unit 2 is provided with a water supply connection hole 5C1 and a hot water supply inlet connection port 5h corresponding to the water supply inlet connection port 4c and the hot water supply outlet connection port 4h of the water heater 1, respectively. A water heater connection lower h, a hot water supply post connection lower c, and a water supply connection port 8 are provided for the outgoing pipe 6h and the return pipe 6c of No. 3, respectively, and the hot water supply inlet connection port 5h and the water heater connection lower h are connected to the hot water supply outgoing pipe 9h. At the same time, the water heater pipe 9c from the hot water supply post-connection lower c and the water supply pipe 10 from the water supply connection port 8 are merged and connected to the water supply outlet connection port 5c, and a circulation pump is connected to the water heater pipe 9c. 11, and a check valve 12 is provided on the downstream side thereof, and a check valve 13 is also provided in the water supply pipe 10, and between the corresponding connection ports 4h, 5h; 4c, 5c of the water heater 1 and the hot water supply circulation unit 2. 14 hours of piping.

14c, and the outgoing piping 6h and incoming piping 6c of the hot water supply section 3 are connected to the water heater connection lower h of the hot water supply circulation unit 2, respectively.
Connected to the hot water supply post connection lower C, a hot water supply circulation system H is formed from the water heater 1 to the hot water supply section 3 via the hot water supply circulation unit 2, and from the hot water supply section 3 to the water heater 1 via the hot water supply circulation unit 2. At the same time, a water supply pipe 15 is connected to the water supply connection port 8 of the hot water circulation unit 2, thereby configuring a water supply system C from the water supply to the confluence position P.

Furthermore, the apparatus described in item 2 is the apparatus described in item 1, in which:
A flowing water detecting means 16 is provided at a suitable location in the water supply pipe 10, and the circulating pump 11 is controlled in accordance with a signal from the flowing water detecting means 16.

Further, the device described in paragraph 3 is the device described in paragraph 1,
A flow rate detection means 17 is provided in the water heater pipe 9c, and a flow rate detection means 19 is provided in the water supply pipe 18 of the water heater 1. It controls the

[Function and Examples]

As described above, the water heater of the present invention has corresponding connection ports 4h and 5h between the water heater 1 and the hot water circulation unit 2.

Connect 4c and 5c with piping 14h and 14C, and
The branch piping 6h and return piping 6C of the hot water supply section 3 are connected to the water heater connection lower h and water heater connection lower c of the hot water supply circulation unit 2, respectively, from the water heater 1 to the hot water supply section 3 via the hot water supply circulation unit 2. A hot water circulation system H is formed from the hot water supply section 3 to the water heater 1 via the hot water circulation unit 2, and a water supply pipe 15 is connected to the water supply connection port 8 of the hot water circulation unit 2, and the water supply pipe 15 is connected from the water supply to the joining position. This system constitutes a water supply system C leading to P. Since the units are connected and configured in this way, an existing water heater 1 can be used, and the capacity can be selected appropriately, and a common water heater 1 can be used. The hot water circulation unit 2 can configure a wide variety of hot water supply devices. Of course, it goes without saying that a newly configured water heater 1 can be used.

The operation of the water heater constructed as described above will be explained based on the embodiment shown in FIGS. 1 and 2.

First, when hot water is not being supplied from the hot water outlet 20 etc. of the hot water supply section 3, water is not supplied from the water supply pipe 10, and in this state, the circulation pump 11 is operated to configure the hot water supply circulation system H. In addition to circulating water in the piping, water heater 1
The burner 22 is controlled in accordance with the temperature of the circulating water detected by the water temperature detecting means 21 provided in the heat exchanger 23 to maintain the water temperature at a predetermined temperature. In the above case, circulation pump 1
1 may be operated continuously or may be operated intermittently at predetermined time intervals.

When the hot water outlet 20 is opened to start hot water supply, an amount of clean water commensurate with the amount of hot water dispensed is supplied from the water supply through the water supply system C and into the hot water circulation system H from the confluence point P. In this state, While stopping the operation of the circulation pump 11,
Operate the burner 23. The water supplied to the hot water circulation system H does not flow in this direction because of the check valve 12, but all flows in the direction of the heat exchanger 23 of the water heater 1. After being heated, the hot water circulation system H is connected to the water heater 1.
From there, the hot water passes through the hot water supply circulation unit 2 again to reach the hot water supply section 3, where the hot water is discharged from the hot water outlet 20. In such a case, immediately after opening the hot water outlet 20 and starting hot water supply, first the hot water circulation system H is opened.
At this time, residual water in the piping on the downstream side of the heat exchanger 23 is discharged, but since this residual water is maintained at a predetermined temperature by the circulation described above, hot water at a predetermined temperature is obtained immediately after the hot water is discharged. After all the remaining water has been discharged, fresh tap water that has been supplied and heated to a desired temperature in the heat exchanger 23 is discharged.

In FIGS. 1 and 2, reference numeral 24 indicates a water temperature detection means, and the burner 22 is controlled by the water temperature detection means and the flow rate detection means 19, etc., as appropriate, such as proportional control. , it is possible to control the temperature of hot water from the tap 20 to a desired value.

As described above, the hot water circulation operation of the hot water circulation system H by the circulation pump 11 is performed by detecting the absence of hot water in the hot water supply section 3 and when there is no hot water being discharged. This control can be performed by the following method, etc.

First, the method shown in FIG. 1 is a method in which a flowing water detecting means 16 is provided at an appropriate location of the water supply pipe 10, and the circulation pump 11 is controlled according to a signal from the flowing water detecting means 16. The hot water output from the hot water supply section 3 corresponds to the water supply from the water supply pipe 10 to the hot water supply circulation system H. Therefore, when this water supply is detected, the hot water circulation operation by the circulation pump 11 is stopped, so that the hot water supply at the time of hot water supply is stopped. It is possible to prevent the inconvenience of interference between the hot water supply operation and the hot water supply circulation operation.

Next, in the method shown in FIG. 2, the water heater pipe 9c is provided with a flow rate detection means 17, and the water supply pipe 18 of the water heater 1 is provided with a flow rate detection means 19, and each flow rate detection means 19.17 detects the flow rate. The circulation pump 11 is controlled according to the difference in signals. The hot water in the hot water supply section 3 causes the water supply pipe 10 to
When water is supplied to the hot water supply circulation system H from By stopping the hot water circulation operation by the circulation pump 11 when this is detected, it is possible to prevent the inconvenience of interference between the hot water supply operation and the hot water circulation operation.

In the water heater of the present invention, both the water heater 1 and the hot water circulation unit 2 require control means 25 and 26 and power supply means (not shown), but the latter is of course necessary. ,
It is easy to connect the former control means stages 25 and 26 with a connector 27, etc., and to control them appropriately through communication between both control means 25 and 26.

〔Effect of the invention〕

As described above, the present invention makes it possible to configure a circulating hot water system without requiring a hot water storage tank and one of the two pumps, which were required in the conventional configuration, resulting in low cost and savings. This has the effect of providing a hot water supply device that can obtain hot water at a predetermined temperature immediately after hot water is tapped, while satisfying the space requirement. In particular, in the present invention, such a water heater is constituted by a water heater, a hot water supply circulation unit, and a hot water supply section, and these are connected by piping. The present invention has the advantage that a wide variety of water heaters can be constructed by appropriately setting its configuration and capacity, and that existing water heaters can be used.

[Brief explanation of the drawing]

FIGS. 1 and 2 are system diagrams showing embodiments corresponding to each configuration of the present invention, and FIG. 3 is a system diagram of a conventional example. Coupling number 1...Water heater, 2...Hot water circulation unit, 3.
...Hot water supply section, 4C...Water supply inlet connection port, 4h...Hot water supply outlet connection port, 5C...Water supply outlet connection port, 5h...
Hot water supply outlet connection port, 6h...outgoing pipe, 6C...return pipe, 7h...water heater connection port, 7C...water heater connection port,
8... Water supply connection, 9h... Hot water supply pipe, 9C...
・Water heater pipe, 10... Water supply pipe, 11... Circulation pump, 1213... Check valve, 14h, 14c... Piping,
15...Water pipe, 16...Flowing water detection means, 17.1
9...Flow rate detection means, 18...Water supply piping, 20...
・Tap water outlet, 21° 25...Water temperature detection means, 22...
Burner, 23... Heat exchanger, 24... Water temperature detection means, H... Hot water circulation system, C... Water supply system, P...
Merging position

Claims (3)

[Claims] (1) Consisting of a water heater, a hot water supply circulation unit, and a hot water supply section, the hot water supply circulation unit includes a water supply outlet connection port corresponding to the water supply inlet connection port and a hot water supply outlet connection port of the water heater, respectively, and a hot water supply section. In addition to providing an inlet connection port, a water heater connection port, a water heater connection port, and a water supply connection port are provided that correspond to the outgoing piping and incoming piping of the hot water supply section, respectively, and the hot water supply inlet connection port and the water heater connection port are connected to the hot water supply incoming and outgoing pipes. At the same time, the hot water return pipe from the water heater connection port and the water supply pipe from the water supply connection port are merged and connected to the water supply outlet connection port, and the hot water return pipe has a circulation pump and a circulation pump downstream thereof. In addition to providing a check valve, a check valve is also provided in the water supply pipe, and piping is used to connect the corresponding connection ports of the water heater and the hot water circulation unit, and the outbound and return piping of the hot water supply section are used for hot water circulation. Connects to the water heater connection port of the unit and the water heater connection port to form a hot water circulation system from the water heater to the hot water supply section via the hot water supply circulation unit, and from the hot water supply section to the water heater via the hot water supply circulation unit. In addition, a water supply pipe is connected to the water supply connection port of the hot water supply circulation unit to form a water supply system extending from the water supply to the joining position. (2) The water supply device according to item 1, wherein a flowing water detection means is provided at an appropriate location of the water supply pipe, and the circulation pump is controlled in accordance with a signal from the flowing water detection means. (3) In the water heater described in paragraph 1, a flow rate detection means is provided in the hot water supply return pipe, and a flow rate detection means is provided in the water supply pipe of the water heater, and the flow rate detection means is provided in accordance with the difference in the flow rate detection signals of the respective flow rate detection means. A hot water supply device, characterized in that the circulation pump is controlled by the water heater.