JP2002106966A - Hot water production equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a hot water production apparatus which is of a silent type in which steam and hot water are not brought into direct contact, and which effectively utilizes the calorific value of steam drain. SOLUTION: A hot water pipe 13 and a steam pipe 12 are connected in parallel to a hot water tank 14. The heat exchanger 11 is provided so as to straddle both the hot water pipe 13 and the steam pipe 12. A steam trap 18 is provided between the hot water tank 13 and the steam pipe 12.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION

[0001] The present invention relates to a hot water producing apparatus using steam, and more particularly to a hot water producing apparatus that prevents noise and vibration caused by disappearance of steam bubbles.

2. Description of the Related Art A conventional hot water producing apparatus using steam is constructed, for example, as shown in FIG. In the figure, 1 is a steam mixer, 2 is a steam pipe, 3 is a hot water pipe, 4
Denotes a hot water tank, 5 denotes a hot water pump, 6 denotes a heat exchanger, and 7 denotes a processing liquid pipe. The steam mixer 1 is disposed at the intersection of the hot water pipe 3 and the steam pipe 2, and introduces steam into the hot water. The hot water heated by the steam is stored in a hot water tank 4 and supplied to a heat exchanger 6 by a hot water pump 5 to be used for heating a predetermined processing liquid or the like that requires heating.

[Problems to be solved by the invention]

In a conventional hot water producing apparatus, steam condenses as soon as it comes into contact with the hot water and causes a sudden volume decrease, so that steam bubbles are crushed in the hot water and a loud noise is generated.
In severe cases, the impact when the steam bubbles were crushed could generate noise or damage the equipment. For this reason, attempts have been made to reduce the impact and noise by reducing the size of the steam bubbles.However, as long as the steam comes into direct contact with the hot water, some noise is unavoidable. Was requested. In addition, in another conventional hot water production apparatus, for example, as shown in FIG. 3, a heat exchanger 11 is used to avoid direct contact between steam and hot water so as to prevent generation of noise. The steam drain after passing through the vessel 11 was wastefully discarded from the steam trap 18 to the outside. SUMMARY OF THE INVENTION An object of the present invention is to provide a hot water production apparatus which is of a silent type in which steam and hot water are not brought into direct contact, and in which the heat of a steam drain is effectively used.

[0003]

Means for Solving the Problems To solve the above problems, a hot water production apparatus according to the present invention connects a hot water pipe and a steam pipe in parallel to a hot water tank, and connects the hot water pipe and the steam pipe to both the hot water pipe and the steam pipe. A heat exchanger is arranged in a straddling manner, and a steam trap is arranged between the hot water tank and the steam pipe. By transmitting the heat of the steam to the hot water through the heat exchanger as described above, it is possible to eradicate the noise generation due to the disappearance of the bubbles of the steam, and to join the steam drain to the hot water via the steam trap. The amount of heat contained in the drain can be used effectively. In addition, since the steam drain is already liquefied, there is no danger of generating noise even when the steam drain joins the hot water.

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
It will be described based on. FIG. 1 is a conceptual diagram of a hot water producing apparatus according to the present invention, in which 11 is a heat exchanger, 12 is a steam pipe, 13 is a hot water pipe, 14 is a hot water tank, 15 is a hot water pump, 16 is a heat exchanger, 17 Denotes a processing liquid pipe, and 18 denotes a steam trap. The device of the present invention is different from the conventional device in that the heat exchanger 11 and the steam trap 18 are provided, and the steam trap 18 is connected to the hot water tank 14. The other parts are the same as those of the conventional apparatus shown in FIGS. The heat exchanger 11 can use, for example, a plate-type heat exchanger. The heat exchanger 11 does not directly contact the steam with the hot water, but indirectly transfers the heat of the steam to the hot water to reduce the temperature of the hot water. Can be raised.

[0005] The steam trap 18 is disposed in the steam pipe 12 between the heat exchanger 11 and the hot water tank 14. The steam trap 18 is a kind of check valve which is opened when the fluid on the upstream side is liquefied. If the steam is not completely drained, this steam trap 1
8, hot water that has drained and passed through the steam trap 18 flows into the hot water tank 14. The steam drain from the steam trap 18 may be piped so as to be introduced into the hot water pipe 13 between the heat exchanger 11 and the hot water tank 14.

The hot water producing apparatus is constructed as described above, and supplies steam to the steam pipe 12 while driving the hot water pump 15 to circulate the hot water in the hot water pipe 13 so that the hot water is mainly supplied before and after the heat exchanger 11. The temperature can be raised. In addition, although the temperature of the steam after passing through the heat exchanger 11 drops significantly, it still maintains a higher temperature than the hot water temperature after leaving the heat exchanger 11,
After passing through the steam trap 18, the water becomes 100% drain water. And this drain water is used as it is in the hot water tank 14.
Flows into. In addition, even if it is drain water, the hot water tank 14
Since the temperature of the hot water flowing into the hot water is still higher than the temperature of the hot water flowing into the hot water tank, the drain water is mixed with the hot water in the hot water tank 14 to be effectively used for increasing the temperature of the hot water in the tank.

[0007]

As described above, according to the present invention, the heat is transferred to the hot water via the heat exchanger without bringing the steam into direct contact with the hot water, and the steam drain flows into the hot water tank to form the steam drain. Since the amount of heat possessed is effectively used, generation of noise can be prevented while maintaining the thermal efficiency of the hot water production device at a high level.

[0008]

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a hot water production device according to one embodiment of the present invention.

FIG. 2 is a conceptual diagram showing an example of a conventional hot water production device.

FIG. 3 is a conceptual diagram showing another example of a conventional hot water production device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Steam mixer 2 ... Steam piping 3 ... Hot water piping 4 ... Hot water tank 5 ... Hot water pump 6 ... Heat exchanger 7 ... Treatment liquid piping 11 ... Heat exchanger 12 ... Steam piping 13 ... Hot water piping 14 ... Hot water tank 15 ... Hot water Pump 16: Heat exchanger 17: Treatment liquid piping 18: Steam trap

Claims (1)

[Claims] 1. A hot water tank and a steam pipe are connected in parallel to a hot water tank, and a heat exchanger is provided so as to straddle both the hot water pipe and the steam pipe. A hot water production device, wherein a steam trap is disposed between the steam traps.