JPH0247393Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat exchanger tank that can effectively heat fresh water using waste hot water used in kitchens, baths, saunas, cleaning factories, and the like.

This is a conventional heat exchanger tank as shown in Figure 1, where 1 is the tank body, 2 is the inlet pipe of the waste hot water, 3 is the drain pipe, and 4 is heated by a flexible pipe installed inside the tank body. This is a pipe for the inflow and outflow of fresh water.

The conventional structure is simply as described above, and the heated waste water 6 that flows into the tank body 1 from the inflow pipe 2 is heated to a constant temperature by warming the fresh water in the corrugated pipe 4 from the outside in the tank body 1. When using the above-mentioned device to heat clean water that is 18 degrees from the hot water discharged from the bathhouse, the temperature is at most around 25 degrees. In addition, scum that has flowed in together with the waste hot water accumulates on the bottom of the tank body and the outer periphery of the corrugated pipe, making cleaning difficult and causing a decline in the heat exchange function.

The present invention aims to eliminate such problems, and will be explained below with reference to FIGS. 2 and 3.

1 is the tank body, 2 is the inlet pipe for waste hot water, 3 is the drain pipe, and 4 is the fresh water supply pipe for heating installed inside the tank body 1. In the design, the inflow pipe 2 is located eccentrically from the center of the tank body 1, and a cylindrical pipe 8 of a size that reaches approximately the bottom of the tank body is arranged at the center of the flexible pipe 4.
In addition, a large number of through holes 9 are bored in the outer peripheral wall surface of the cylindrical tube 8. Therefore, the upper part of the pipe 8 is connected to an air supply pipe of an air compressor (not shown) to allow compressed air to flow in, and an inflow pipe 2 of the waste hot water is provided at the upper part of the pipe. Stirring blade 1 is placed at the same height as
2 is rotatably supported.

In this case, 13a and 13b are bearing flanges for this purpose. Note that 14 and 15 are a guide plate and a suction port for floating scum, which are provided in the drain pipe 3 at a position equivalent to or slightly lower than the above-mentioned stirring blade 12.

The present invention has the above-mentioned configuration, and when in use, compressed air is blown out from the through hole 9 of the cylindrical pipe 8. Therefore, within the tank body 1, convection as shown in A and B occurs inside and outside the flexible pipe 4. It functions to eliminate the difference in temperature between the top and bottom, and also prevents scum from accumulating on the bottom of the tank body or adhering to the outer periphery of the corrugated pipe 4, resulting in efficient heat exchange. This will make it very effective.

On the other hand, since the inflow pipe 2 of the hot waste water is provided at a position eccentric from the center of the container body 1, the stirring blade 12 is slowly rotated in the direction of the arrow C by the force of the inflow water. The scum floating by this rotation is sent into the suction port 15 of the drain pipe 3 via the guide plate 14.

As described above, the present invention causes convection of the hot waste water in the tank body 1, and collects and discharges scum in a floating state without accumulating scum, which contributes to efficient heat exchange and energy saving. death,
Moreover, it becomes possible to maintain sanitary operation for a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a conventional device, and FIG. 2 is a longitudinal sectional view of the device of the present invention, in which A is a longitudinal sectional view and B is a plan view. 1... Container body, 2... Inflow pipe of waste hot water, 3...
...Drain pipe, 4...Serpentine pipe, 8...Cylinder pipe, 9...Through hole, 12...Stirring blade, 14...Guide plate, 15...
Suction port.

Claims (1)

[Scope of utility model registration request] A freshwater pipe is installed vertically in the center of the tank body.
An inflow pipe for the hot waste water is arranged horizontally eccentrically from the center of the tank body in the upper part of the fresh water pipe, and a cylindrical pipe is provided in the depth direction of the center of the fresh water pipe with a length that reaches the bottom of the tank. The cylindrical pipe has a large number of cylindrical holes facing downward so that compressed air can be blown out, and a stirring blade is placed in the upper part at the same height position corresponding to the above-mentioned waste hot water inflow pipe. The scum guide plate is supported so that it can move freely, and a scum guide plate is installed between the tip of the stirring blade and the tank inner wall at a position equal to or slightly lower than the stirring blade and protrudes from the drain pipe without colliding with the tip of the stirring blade. A waste water heat exchanger characterized in that a suction port is provided on the wall surface of the drain pipe on the side where the scum floating in the tank circulates and collides with the scum guide plate.