JPH0749244Y2 - Heat pipe type heat exchanger - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heat pipe type heat exchanger used as, for example, an exhaust heat recovery device.

In this specification, upper and lower, left and right refer to the upper, lower, left and right of FIG. The front-back direction means the direction in which the high-temperature gas passage and the low-temperature gas passage extend.

As a heat pipe type heat exchanger used in an exhaust heat recovery apparatus, a high temperature gas flow path and a low temperature gas flow path are formed by a partition wall in a rectangular frame, and both penetrate the partition wall and A plurality of heat pipes with spiral fins are arranged across the flow path, and both ends of the heat pipe penetrate the right and left vertical frame members of the rectangular frame and are projected to the outside. It is known that the right and left vertical frame members are covered with a covering member provided on the outer surfaces thereof.

In this heat exchanger, in order to prevent damage to the heat pipe due to abnormally high temperature, a thermocouple is welded to the proximal end of the spiral fin of the heat pipe where the internal pressure is highest, and the temperature of the heat pipe is Is detected, and when the detected temperature exceeds a certain temperature, the supply of high temperature gas to the high temperature gas flow path is stopped.

However, the conventional heat pipe heat exchanger has a problem that it is difficult to weld the thermocouple to the spiral fin of the heat pipe. Further, after welding the thermocouple to the heat pipe, it is necessary to incorporate this heat pipe into the frame, and there is a fear that the thermocouple may come off from the heat pipe during this incorporation. Also, replacement work such as when the thermocouple is damaged during use is difficult.

An object of the present invention is to provide a heat pipe type heat exchanger that solves the above problems.

Means for Solving the Problems The heat pipe type heat exchanger according to the present invention has a rectangular frame,
The partition wall forms a high-temperature gas flow path and a low-temperature gas flow path, and a plurality of heat pipes are arranged so as to penetrate the partition wall and span both flow paths. A heat pipe type heat exchanger in which a frame member penetrates and is projected to the outside, and outwardly projecting end portions of the heat pipe are covered with coating members provided on the outer surfaces of the left and right vertical frame members. The temperature sensor is fixed by being sandwiched between the outer wall of the heat pipe and the sensor fixture that is mechanically and removably attached to the heat pipe on one of the outward protruding ends. An inspection port that can be opened and closed is formed in a covering member provided on the vertical frame member on the side where the temperature sensor is fixed.

Since the temperature sensor is sandwiched by the peripheral wall of the heat pipe and the sensor fixture mechanically and detachably attached to the heat pipe on either one of the outward protruding ends of the heat pipe, The temperature sensor can be easily attached to the heat pipe. In addition, since the cover member provided on the vertical frame member on the side where the temperature sensor is fixed has an opening / closing check port that can be opened and closed, after installing the heat pipe in the frame, attach the temperature sensor to the heat pipe through the check port. It can be attached, and unlike the conventional case, there is no risk of it coming off when it is assembled into the frame of the heat pipe. Further, replacement work when the temperature sensor is damaged can be easily performed through the inspection port.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

The heat pipe type heat exchanger (1) consists of upper and lower horizontal frame members (2
a) and a rectangular frame (2) having left and right vertical frame members (2b)
A high temperature gas flow channel (4) and a low temperature gas flow channel (5) are formed by the partition wall (3), and a plurality of high temperature gas flow channels (4) penetrate the partition wall (3) and extend over both flow channels (4) (5). A heat pipe with spiral fins (6) is arranged.

The left and right vertical frame members (2b) are composed of a pair of vertical angles (not shown) arranged at both front and rear edges, a pair of horizontal angles (7) arranged at both upper and lower edges, both vertical angles and both. The end plate (8) is welded at a vertical angle so as to close the portion surrounded by the horizontal wall (7). Both ends of the heat pipe (6) are projected outward through the same number of holes as the heat pipe (6) formed in the end plate (8). The outer protruding end (6a) of the heat pipe (6) has left and right vertical frame members (2b).
Is covered with a covering member (9) provided on the outer surface of the.

A thermocouple temperature sensor (12) is fixed to the left outer protruding end (6a) of the heat pipe (6). Temperature sensor (1
2) is a heat pipe (6) and a sensor fixture (13) mechanically and detachably attached to the heat pipe (6).
It is fixed by being sandwiched with the peripheral wall of. The sensor fixture (13) is composed of a pair of front and rear constituent members (13a) screwed together. Both of the component members (13a) are composed of an arcuate portion and flat portions extending upward and downward from the upper and lower ends of the arcuate portion, and the flat portions are screwed to each other. The temperature sensor (12) is sandwiched between the arcuate portion of the one component member (13a) and the peripheral wall of the heat pipe (6). The inspection port (14) is attached to the covering member (9) provided on the outer surface of the left vertical frame member (2b).
Are formed. The inspection port (14) is closed by a lid (17) detachably attached to an outward flange (16) formed around the inspection port (14).

In the above, the temperature sensor (1
The mounting of 2) is performed through the inspection port (14) after mounting the heat pipe (6) in the frame (2) and before mounting the lid (17). When it becomes necessary to replace the temperature sensor (12) such as when it is damaged, the lid (17) is removed and the inspection port (14) is opened.

Effect of the Invention According to the heat pipe type heat exchanger of the present invention, the temperature sensor can be easily attached to the heat pipe as described above. In addition, after the heat pipe is assembled in the frame, the temperature sensor can be attached to the heat pipe through the inspection port, and there is no risk that the temperature sensor will come off when the heat pipe is assembled in the frame unlike the conventional case. Moreover, replacement work when the temperature sensor is damaged can be easily performed through the inspection port.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a partially cutaway front view, and FIG. 2 is an enlarged side view of a heat pipe to which a temperature sensor is attached. (1) ... heat pipe type heat exchanger, (2) ... square frame, (2b) ... both left and right vertical frame members, (3) ... partition wall,
(4) ... high temperature gas flow path, (5) ... low temperature gas flow path, () ... heat pipe, (6a) ... outward protruding end,
(9) …… Coating member, (12) …… Temperature sensor, (13)…
… Sensor fixture, (14) …… Inspection port.

Claims (1)

[Scope of utility model registration request] 1. A rectangular frame is formed with a high temperature gas flow path and a low temperature gas flow path by partition walls, and a plurality of heat pipes are arranged so as to penetrate the partition wall and extend over both flow paths. Both ends are pierced through the left and right vertical frame members of the rectangular frame and are projected to the outside, and the outward protruding ends of the heat pipe are covered by the covering members provided on the outer surfaces of the left and right vertical frame members. In a pipe-type heat exchanger, it is sandwiched between one of the outward projecting end portions of both ends of the heat pipe by a peripheral wall of the heat pipe and a sensor fixture mechanically and detachably attached to the heat pipe. By
A heat pipe type heat exchanger in which a temperature sensor is fixed, and a cover member provided on a vertical frame member on the side where the temperature sensor is fixed has an inspection port that can be opened and closed.