JPS6155583A - Heat exchanger utilizing waste heat - Google Patents

Abstract

PURPOSE:To improve the efficiency of heat exchanging operation, make no incomplete combustion and damage of outer appearance of the device and to prevent the high cost of a unit by a method wherein a heat exchanger pipe is uniformly contacted with waste gas. CONSTITUTION:An inner cylinder 1 is arranged in an outer cylinder 2 in coaxial relation thereto, the lower surface of the inner cylinder 1 is opened to provide an inlet port for discharged gas. The upper surface of the inner cylinder 1 is closed and at the same time a coil-formed heat exchanging pipe 4 is arranged in the clearance between the inner cylinder and the outer cylinder. A plurality of discharging holes 5 are formed around the inner cylinder 1 in compliance with the substantial entire length of the heat exchanging pipe and at the same time the surrounding part of the outer cylider 2 is formed to have no holes therein. As a result, it is possible to inject the discharging gas toward the entire heat exchanger pipe from the discharging holes around the inner cylinder, to perform a uniform heat exchanging operation over the entire length of the heat exchanger pipe and to improve the efficiency of heat exchanging operation. Further, the incomplete combustion is not carried out, its outer appearance is not damaged and its cost is not expensive.

Description

[Detailed description of the invention] 【Technical field】

The present invention relates to a technique for recovering heat from the exhaust gas of a combustion lamp having an exhaust stack, such as a boiler or a chimney stove, to heat a room, for example.

[Background technology]

In the past, as shown in Fig. 4, a fill-shaped heat exchange pipe 4a was disposed inside the exhaust pipe 6a of a chimney type stove, but the exhaust gas was disposed throughout the entire inside of the exhaust pipe 6a. Moreover, the upper part of the heat exchange pipe 4a is located at the lower end of the -
The exhaust air was difficult to evenly hit the heat exchange pipe 4u due to the shadow of the winding, resulting in poor heat exchange efficiency. In order to increase the heat exchange efficiency, there is a conventional example in which the heat exchange pipe 4a is shaped like a staggered coil in which the winding diameter alternately changes in size, as shown in Fig. 5. is improved compared to the conventional example of fjfJl, but the upper part of the heat exchange pipe 4a is still in the shadow of the lower end of the -turn and the second turn, and the J( Further, there is a problem that the heat exchange pipe 4a is not easy to manufacture, resulting in poor manufacturing efficiency and high cost.Furthermore, as shown in FIG. A heat exchange pipe 4a is arranged in the gap between the two parts, and a gun bar 12a which can be opened and closed is provided at the lower end of the inner cylinder 1a. There is also a system in which the amount of heat acquired can be adjusted by recovering the amount of heat and controlling the flow of the exhaust gas using a pumper 12a.However, in this conventional example, one width of the gap between the inner cylinder 1a and the outer cylinder 2a If it is small, the exhaust resistance when the gunper 12a is closed will be large, causing incomplete combustion, and at the same time, the exhaust volume will be reduced and the heat exchange pipe 4
There is a problem that the amount of heat acquired in the inner cylinder 1a decreases.
Even if you try to widen the gap between the outer cylinder 2a and the outer cylinder 2a, if you widen it too much, the significance of having a double exhaust pipe will be lost, and in order to widen the gap, the dimensions of the outer cylinder 2a will have to be increased, which will affect the appearance. I had the above problem.

[Purpose of the invention]

The present invention was made in view of the above-mentioned technical background, and its purpose is to improve heat exchange efficiency by making it possible to bring the heat exchange pipe into even contact with the exhaust gas, and to improve the heat exchange efficiency. It does not cause incomplete combustion, does not damage the appearance, and does not increase costs.1. We provide heat exchangers for heat utilization.

[Statement of the invention]

The heat exchanger utilizing waste heat of the present invention has an outer cylinder 2 arranged coaxially within an inner cylinder 1, the lower surface of the inner cylinder 1 is opened to form a hole 3 for inlet of exhaust gas, and the upper surface of the inner cylinder 1 is opened. A coiled heat exchange pipe 4 is arranged in the gap A between the inner cylinder 1 and the outer cylinder 2, and a plurality of exhaust pipes are arranged on the surface of the inner cylinder 1 corresponding to almost the entire length of the heat exchange pipe 4. This is characterized in that the outer cylinder 2 has a hole 5 and the peripheral surface of the outer cylinder 2 is formed without holes, thereby achieving the above object. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. 6 is an exhaust pipe of a combustion equipment 7 such as a boiler or a chimney stove, and the exhaust pipe 6 is formed into a double cylinder shape by coaxially arranging a small diameter inner pipe 1 and a large diameter outer pipe 2. There is. The inner cylinder 1 has a closed upper surface, a large number of exhaust holes 5 are perforated on the circumferential surface over almost the entire length of the inside of the outer cylinder 2, and an exhaust inlet 3 is connected to the combustion equipment 7 through a bi-port on the lower surface. has been done. The outer cylinder 2 has a lower end closed with the outer periphery of the inner cylinder 1, and the peripheral surface is formed without holes.
The top end is open. , 4 is a heat exchange pipe 4 wound to a constant diameter, and is housed in a gap I between the outer periphery of the inner cylinder 1 and the inner periphery of the outer cylinder 2. is passed through and pulled out to the outside. When a heat exchange medium such as hot water is circulated in the heat exchange pipe 4, the high-temperature exhaust gas rising upward from the inlet port 3 at the lower end of the inner cylinder 1 passes through each exhaust hole 5 into the inner cylinder. Flows outward, at this time, evenly contacts each part of the heat exchange pipe 4, performs uniform heat exchange and efficient heat exchange, heats the heat exchange medium inside the heat exchange pipe 4, and heats the heated heat exchange The medium will be used effectively. On the other hand, the exhaust gas after heat exchange is released into the atmosphere from the opening at the upper end of the outer cylinder 2. The exhaust pipe 6 has the above-mentioned function, but since the exhaust gas rising inside the inner pipe 1 accumulates at the upper end and tends to come out through the exhaust hole 5 on the upper end side, the opening ratio of the exhaust hole 5 is increased downward. (For example, it is preferable to increase the diameter of the pores or increase the density of the pores.) The heat exchange efficiency can be improved by decreasing the aperture ratio in the upper part. FIG. 3 shows an example of a method of using this heat exchanger utilizing waste heat. That is, the end of the heat exchange pipe 4 is connected to the floor heating panel 10 through the pipe 9. heat exchange pipe 4
A heat exchange medium (hot water) is circulated within the floor heating panel 10, and the heat exchange medium is circulated through the circulation unit 11.
The heated heat exchange medium is forcibly circulated and sent into the floor heating panel 10, where the heat is radiated into the room and used for floor heating, and after the temperature becomes low, the heated heat exchange medium is sent to the floor heating panel 10. It is sent into the exchange pipe 4. What is shown in FIG. 2 is the other side of the present invention, in which the upper end of the inner cylinder 1 is closed with a gripper 8, and the upper end of the inner cylinder 1 can be opened by rotating the gripper 8 as necessary. It is. According to this embodiment, when the gunper 8 is completely closed, it can be used in the same manner as the first embodiment, but by opening the gunper 8 by an appropriate amount (a part of the air can escape from the upper end of the inner cup 1, It is possible to reduce the amount of acquired 8fA, and the Gumper 8
The 8 exchange effects and 1 can be adjusted by the following operations. [Effect of the invention 1] Since the present invention is configured as described above, the exhaust air is discharged from the exhaust hole on the inner cylinder circumferential surface to the entire heat exchange pipe. This has the advantage of allowing heat exchange to be carried out evenly over the entire length of the heat exchange pipe, resulting in a heat exchanger with high heat exchange efficiency. There is no need to narrow the gap between the outer cylinder and the cylinder, so there is no risk of incomplete combustion, there is no need to make the outer cylinder thicker, the appearance does not deteriorate, and there is no need to worry about high costs.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the present invention, Fig. 2 is a schematic sectional view showing the other side of the same, Fig. 3 is a perspective view showing one method of using the same, and Fig. 4 is a conventional example. 5 is a sectional view of another conventional example, and FIG. 6 is a sectional view of still another conventional example, where 1 is an inner cylinder, 2 is an outer cylinder, 3 is an inlet, and 4 is a heat exchanger. 5 is a pipe, 5 is an exhaust hole, and A is a gap between the inner cylinder and the outer cylinder. Agent Patent Attorney Ishi 1) Chief 7 No. 1 Amendment to figure procedure (spontaneous) November 15, 1980 Patent Application No. 177013 U2, Title of Invention: Exhaust Heat Utilization Heat Exchanger 3, Amended Patent applicant address 1048 Oaza Kadoma, Kadoma City, Osaka Name (583) Matsushita Electric Works Co., Ltd. Representative Iku Kobayashi 4 Agent postal code 530 5 Date of amendment order 8 Contents of amendment As shown in the attached sheet, the scope of Patent Claim 3g in Specification 9 of this application is corrected as follows. "(1) Outside" L inside "- Inside" 1 ball - Arranged coaxially, the bottom surface of the inner cylinder is opened to serve as an exhaust entrance, and the top surface of the inner cylinder is closed, so that the inner cylinder and outer cylinder are connected. A coil-shaped heat exchange pipe is installed in the gap between the two, and multiple exhaust holes are made on the circumference of the inner cylinder, corresponding to almost the entire length of the heat exchange pipe, and the circumference of the outer case is made without holes. A heat exchanger utilizing waste heat, characterized by comprising: (2) A heat exchanger utilizing waste heat according to claim 1, characterized in that the upper surface of the inner cylinder is releasably closed;
2. Delete [outer cylinder 2 inside inner cylinder 1] in lines 3 and 4 of 4Kg as above and insert ``inner cylinder 1 inside outer cylinder 2''. 3. Figure 5 of the drawings attached to this application is corrected as shown in the attached sheet.

Claims (2)

[Claims] (1) Arrange the outer cylinder coaxially within the inner cylinder, open the lower surface of the inner cylinder to serve as an exhaust entrance, and close the upper surface of the inner cylinder,
A coiled heat exchange pipe is arranged in the gap between the inner cylinder and the outer cylinder, and multiple exhaust holes are made on the circumference of the inner cylinder, corresponding to almost the entire length of the heat exchange pipe, and the circumference of the outer cylinder is A heat exchanger utilizing waste heat characterized by having a non-porous surface. (2) A heat exchanger utilizing waste heat according to claim 1, characterized in that the upper surface of the inner cylinder is releasably closed.