JPS6189442A - Instantaneous hot water supply device - Google Patents

Abstract

PURPOSE:To carry out supply of warm water by a compact pipe arrangement and to unnecessitate a pump by providing a steam generator in a heat source apparatus of a hot water supplier, heating a supply hot water pipeline up to a cock portion with generated steam, and intermittently carrying out the steam transport by a single pipe system. CONSTITUTION:When a steam generator 6 is heated by means of a burner 5, a steam is generated. The steam flows through a steam pipe 7 as it heats a supply hot water pipeline reduced in pressure. When the combustion of the burner 5 is stopped, the temperature of the steam generator 6 is lowered, and the internal pressure of the tank 8 is reduced. Therefore, hot water within the tank 8 flows back to the steam generator 6. When the temperature within the supply hot water pipeline and the liquid level of the liquid tank assume values which are less than predetermined values, the steam generator 6 is reheated by the burner 5 to heat the supply hot water pipeline 3.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water feeder that prevents hot water from cooling in a hot water supply pipe that connects a hot water supply zone and a hot water tap, and provides warm hot water as soon as the hot water tap is opened.

2. Description of the Related Art A conventional hot water feeder has a hot water storage boiler 1 as shown in Fig. 4.
Extend the hot water supply pipe 3 connecting the hot water supply faucet 4 to the hot water return pipe 1
1, a pump 12 is arranged in the return hot water piping 11, and the piping is fully extended to the hot water storage boiler 10, and the hot water storage boiler 10, the hot water supply piping 3, the return hot water piping 11, and the pump 12 constitute a hot water circulation circuit. Ta. In this configuration, hot water is constantly circulated by the pump 12, and there are hot water supply and return hot water piping, and the piping diameter is large, so there is a lot of heat radiation loss even if the insulation material is wrapped around it, and the pump and drive consume electricity. 1. It has the disadvantage of high energy cost. In addition, system costs such as construction of the pump 12 and return hot water piping 11 are high. In addition, there were also problems such as the durability of the mechanical seal of the pump 12, the reliability of the first driving part, and the high operating noise of the pump 12.

The problem that the invention seeks to solve (1) Expensive feeder hot water system.

c21 Reliability and operating noise of pumps that use electricity.

Means for solving the problem In order to solve the above problem, a steam generator is installed in the heat source of the water heater, and the steam pipe that sends the steam generated by the steam generator while heating the hot water supply pipe is connected to the end of the hot water faucet. This device heats the hot water in the hot water supply piping by providing a liquid tank at the tip of the steam pipe and automatically and intermittent operation of conveying the steam using a single pipe 7 and stem.

The working steam heats the water in the hot water supply piping, and the latent heat of vaporization is removed and it becomes liquid and is sent to the liquid tank.When steam generation is stopped, the liquid in the liquid tank returns to the steam generator, and the water in the hot water supply piping is heated. When the temperature drops, steam is generated again, and the above action is repeated intermittently to constantly heat the water in the hot water supply pipe.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1, 2, and 3. A hot water supply pipe 3 is provided beyond a heat exchanger 2 in an instant hot water heater 1, and a hot water tap 4 is provided on the hot water supply pipe. On the other hand, in the instant water heater 1, there is a steam generator 6 that generates pressure heat with a burner 5.
A steam pipe that sends steam from the steam generator 6? f,
, a hot water supply pipe 3 is arranged to be heated, and a liquid tank 8 connected to the steam pipe 7 is provided near the most advanced hot water tap 4. The steam circuit may be of a sealed type or an open type, and various methods can be considered for controlling the stop of steam generation, such as liquid level detection in the steam generator 6 or liquid tank 8, steam or hot water temperature detection, and timer control. On the other hand, the structure of the steam pipe 7 that gives heat to the water in the hot water supply pipe 3 may be as shown in FIGS. It is configured in a bare tube shape with an attachment, and transmits steam heat to the water in the hot water supply pipe 3. Further, in FIG. 3, the steam pipe 7 is provided concentrically on the inside and the hot water supply pipe 3 is provided on the outside. Both are wrapped with heat insulating material 9.

Other configurations of the steam pipe 7 and the hot water supply piping 3 can be considered, and one example of the configuration of an effective heat transfer means for steam heat to hot water supply water is shown.

In this configuration, for example, when the temperature of the hot water in the hot water supply pipe 3 becomes 35°C or lower at any position of the hot water supply pipe 3, the burner 5 ignites it, gives combustion heat to the steam generator 6, and the steam generator Heat the water in 6 and generate all steam. In this case, if the steam circuit is depressurized and configured to be a sealed circuit, one side of the steam generation stop tank 8 is opened at 100°C or below, and if it is communicated with atmospheric pressure, steam will be generated at 100°C+α. +3 minutes, the boiling point rises by the resistance of the steam pipe 7. The generated steam heats the hot water supply pipe 3 while flowing in the direction of the liquid tank 8 where the internal pressure is low.
Raise the temperature of the water inside. High-temperature water that has been deprived of latent heat of vaporization and condensed gathers in the most advanced liquid tank 8. Next, for example, when the water temperature in the hot water supply pipe 3 reaches 45°C, the burner 5
When combustion is stopped, the temperature of the steam generator 6 decreases, the internal pressure decreases, and the hot water in the liquid tank 8 is sent back to the steam generator 6.
At this time as well, the high-temperature hot water of around 80°C heats the hot water in the hot water supply pipe s. This system uses a single steam pipe system to back up steam and liquid. If the water is left as it is and the temperature of the hot water in the hot water supply pipe a falls below 35°C, the above cycle is repeated, resulting in a so-called intermittent heating cycle.

As described above, various other control methods can be considered for the cycle control in this case.

Effect of the invention (1) Piping configuration is simpler than hot water circulation.

Compared to conventional reciprocating piping, it has a bare tube or concentric pipe configuration, and because the heat source is steam, the latent heat of vaporization (539 kcal/l'/a t 100°
C), which is a large amount of heat, and the steam pipe 7 can be constructed with a small diameter of about 5y.

2. Since there is no drive part that consumes a lot of power such as a pump,
The operation is quiet and there are few breakdowns.

(3 For general household use, if the hot water pipe is '/2'10'', it will take 30 to 50 kca to raise the hot water temperature by 10 degrees and h.
l/hr, and if the input level is 1000 kcal/hr, the hot water in the hot water supply pipe can be heated within 2 to 5 minutes, so a compact steam generator is sufficient and it is cheaper than a pump system.

■ Can be applied to prevent hot water pipes from freezing in winter.

[Brief Description of the Drawings] Fig. 1 is a configuration diagram of a feeder device according to an embodiment of the present invention, Fig. 2 a, b, and Fig. 3 a, b are cross-sectional views of a steam pipe and a hot water supply pipe of the same device. , the new front view, and FIG. 4 are configuration diagrams of a conventional feeder device. 1...Instant water heater, 3...Hot water supply piping,
4... hot water faucet, 5... burner, 6...
...Steam generator, 7...Steam pipe. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 CB-) (b) Figure 3 (a,) (b) 4th
figure

Claims (1)

[Claims] A hot water supply pipe having a hot water tap at one end, a steam generator, a liquid tank provided near the hot water tap, and a position where the steam generator and the liquid tank are connected, and the hot water pipe is heated. Instant hot water equipment with arranged steam pipes.