JPS6034936Y2 - hot water production equipment - Google Patents

Description

[Detailed description of the invention] (Purpose of the invention) This invention relates to a production device for mixing steam and cold water to obtain hot water at a constant temperature.

The purpose of this invention is to improve the mixing efficiency of cold water and steam, and to easily obtain hot water at a constant temperature.

Another purpose of this invention is to eliminate impact noise that occurs during mixing.

Still another object of this invention is to achieve the above objects while making the structure relatively simple.

(Prior Art) This type of prior art is described in Japanese Utility Model Publication No. 52-4636.

In this example, in order to obtain hot water at the desired temperature by mixing steam (steam) produced in a boiler with cold water, the mixing chamber for the steam and cold water is constructed as an independent container, and the spouting part of the steam mixing chamber is divided into two. A double-tube type steam injection nozzle is used, and the amount of steam and cold water sent to this mixer is automatically controlled by the water temperature at the mixer outlet, and the hot water discharged from the mixer is sent to a pump. One end of the hot water supply pipe is connected to the bottom of the mixer so that excess hot water is circulated.

Therefore, this example can be evaluated in that it solves the problem of obtaining hot water at a constant temperature by mixing steam and cold water.

However, the structure of the mixing chamber is not necessarily simple and cannot be easily adopted, and as is clear from Figures 2 and 3 of the same publication, the structure of the mixing chamber consists of a bell-shaped main body and a base. The main body is sealed with partition walls arranged alternately at appropriate intervals to provide zigzag passages, and a double-tube steam injection nozzle is provided inside the base.

Therefore, when steam and cold water are mixed in this mixing chamber, the steam is injected from the nozzle at high pressure, but the bubble diameter of the injected steam tends to become large.

Furthermore, it is clear from FIG. 2 that the cross-sectional area of the mixing chamber is larger than that of the cold water piping, and therefore, the liquid flow rate cannot be high, so it is inevitable that the contact mixing efficiency of steam and cold water will be poor.

Therefore, as a result, the generation of impact noise due to the condensation of steam is an unavoidable drawback.

In addition, since steam and cold water simply merge through the zigzag-shaped passage formed by the partition wall, dead spaces are likely to occur, and a hot water return pipe is required to ensure the above-mentioned flow rate, resulting in hot water circulation. This method has the drawback that the device is complicated, such as requiring a pump.

(Structure of the invention) This invention is an attempt to eliminate the above-mentioned drawbacks, and includes an in-line mixer in which right-handed twist wing pieces and left-handed twist wing pieces are arranged alternately in a pipe, A steam pipe leading to a steam source such as a boiler is connected to the side, a hot water pipe is connected to the outlet side, and tap water, industrial water, etc. are connected to the inline mixer side of the steam pipe connected to the inlet side of the inline mixer. Connect a wood pipe leading to a cold water source with a low temperature, install a temperature control valve on the steam pipe, and install a temperature sensor on the hot water pipe to link the temperature control valve and temperature sensor. The temperature of hot water produced by mixing steam and ice with the in-line mixer is controlled by a temperature sensor, a temperature control valve, and the in-line mixer.

The details of this invention will be explained below with reference to the accompanying drawings.

As shown in FIG. 1, an in-line mixer 4 for mixing steam and water has right-handed twist wings 1 and left-handed twist wings 2 arranged alternately in a pipe 3.

This in-line mixer 4 is supported by a pedestal 5 as shown in FIG.

A steam pipe 6 leading to a steam source such as a boiler is connected to the inlet side of the in-line mixer 4.

Although the illustrated steam pipe 6 is curved into a substantially U-shape, the curve has the advantage that the entire piping can be installed compactly.

Therefore, it goes without saying that there is no need to curve the steam pipe 6 unless this point is particularly taken into consideration.

On the other hand, a hot water pipe 20 for supplying the produced hot water is connected to the outlet side of the in-line mixer 4.

A water pipe 7 is connected to the inlet side of the in-line mixer 4.

Therefore, the in-line mixer 4 adopts a structure in which steam and water are respectively combined and supplied.

A pressure gauge 8, a check valve 9, a stop valve 10, a temperature control valve 11, a strainer 12, a stop valve 13, and a pressure gauge 14 are installed in the conduit of the steam pipe 6 in order from the in-line mixer 4 side toward the upstream side, respectively. It is being

Pressure gauge 14 on the inlet side of steam pipe 6 and in-line mixer 4
A substantially U-shaped bypass pipe 15 is connected to the steam pipe 6 on the side of the steam pipe 6 between the side check valve 9 and the steam pipe 6 .

Also, a check valve 17, a stop valve 18, and a pressure gauge 19 are installed in order from the in-line mixer 4 side to the cold water source side of the water pipe 7, respectively.

A hot water pipe 20 is connected to the outlet side of the in-line mixer 4, and a temperature detector 21 that interlocks with the temperature control valve 11 is installed on the hot water pipe 20, and the two are connected by a thin tube 23. ing.

Note that reference numeral 16 in the drawing is a stop valve attached to the steam pipe 6 side of the bypass pipe 15.

Further, a thermometer 22 is installed on the hot water pipe 20 so that the hot water temperature (set temperature) can be checked.

(Operation of the invention) To explain the operation of this invention, first, the steam pipe 6 is connected to a steam source, and the water pipe 7 is connected to a water source.

Next, when the stop valve 18 of the water pipe 7 is opened, the cold water passes through the check valve 17 and advances into the in-line mixer 4.

Next, when the stop valves 10 and 13 on both sides of the steam pipe 6 are opened, the steam passes through the strainer 12, the temperature control valve 11, the stop valve 10, and the check valve 9, and joins the cold water in the in-line mixer 4.
progress towards.

In this case, the steam and cold water are completely mixed in the radial direction by the fluid division, inversion, etc. by the alternately arranged wing pieces 1 and 2 in the in-line mixer 4, resulting in a good airflow dispersion state.

Therefore, the bubble diameter becomes fine, and as a result, almost no impact noise is generated due to condensation of steam.

On the other hand, the mixing action of condensed hot water and cold water is performed at the same time, and hot water can be efficiently produced in a small volume.

By using such an in-line mixer 4, it is possible to maintain good responsiveness and stability even in response to load fluctuations caused by changes in the amount of hot water used, without the need for special measures (for example, bypass circuits, flow control valves, etc.). Hot water can be produced.

The hot water thus obtained is supplied via the hot water pipe 20.

In this case, since the temperature detector 21 is attached to the hot water pipe 20, the gas sealed in the temperature detector 21 is
Expands or contracts when heated or cooled by hot water.

The amount of change in volume is transmitted by the fluid sealed in the thin tube 23 and acts on the temperature control valve 11, thereby opening and closing the temperature control valve 11.

That is.

Changes in the fluid volume within the temperature sensor 21 act on the temperature control valve 11 through the thin tube 23 connecting the temperature control valve 11 and the temperature sensor 21, causing the temperature control valve 11 to open and close to change the amount of steam supplied. Adjust.

Needless to say, when the temperature of hot water is high, the amount of steam supplied is small, and when the temperature is low, the amount of steam supplied is large.

Note that the bypass pipe 15 has a function of guiding the steam in the steam pipe 6 when inspecting the temperature control valve 11.

(Effect of idea) Since this invention has the above configuration, it has the following advantages.

(1) Steam and cold water travel through right-handed and left-handed wings that are alternately provided in the pipe.

At this time, the water vapor and cold water are dispersed and mixed extremely efficiently due to flow splitting/reversal action and overflow motion.

(2) Since the water vapor is finely dispersed within the in-line mixer, almost no impact noise is generated due to condensation.

Furthermore, it can withstand load fluctuations.

(3) Since the temperature control valve attached to the steam pipe and the temperature detector attached to the hot water pipe are connected together,
By detecting the temperature of hot water supplied to the hot water pipe side and issuing a command to the temperature control valve, it is possible to control the amount of steam supplied to the steam pipe and easily obtain hot water at a constant temperature. can.

Therefore, in combination with the effects (1) and (2) above, responsiveness and stability to load fluctuations are improved.

(4) Since there is no need to increase the size of the electrical control mechanism or device, it can be easily adopted for civilian applications such as hospitals and ships.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an in-line mixer, and FIG. 2 is a perspective view showing an embodiment of this invention. Explanation of the symbols of the main parts, 1... Right twist wing piece,
2...Left twist wing piece, 3...Pipe,
4... In-line mixer, 5... Frame, 6... Steam pipe, 7... Water pipe, 11
...Temperature control valve, 20...Hot water pipe, 2
1...Temperature detector.

Claims (1)

[Scope of utility model registration request] An in-line mixer 4 in which right-handed twist wing pieces 1 and left-handed twist wing pieces 2 are arranged alternately in a pipe 3 is installed on a pedestal 5,
A steam pipe 6 is connected to the inlet side of the in-line mixer 4, and a hot water pipe 20 is connected to the outlet side of the in-line mixer 4. A water pipe 7 is connected to the in-line mixer 4 side of the steam pipe 6 connected to the in-line mixer 4 inlet side. A temperature control valve 11 is installed on the pipe of the pipe 6, and a temperature detector 21 is installed on the pipe of the hot water pipe 20.
A hot water production device consisting of 1 connected in an interlocking manner.