JPH0619980Y2 - Heat pipe type heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a heat pipe type heat exchanger used for an electric air heater or the like.

2. Description of the Related Art Conventionally, as a heat pipe type heat exchanger used for an electric warmer or the like, a working fluid forming a gas-liquid two-phase flow is enclosed in a loop-shaped circular tube including a pair of parallel straight tube portions. Cage,
A heat pipe in which one straight pipe portion is positioned higher than the other straight pipe portion, a heat transfer member for mounting a heater mounted in the lower straight pipe portion, and a plurality of heat radiation fins mounted in the upper straight pipe portion. A heat exchanger consisting of and is known.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the conventional heat exchanger, the heat of the heater is transferred to the evaporator of the heat pipe through the heat transfer member for mounting the heater mounted on the lower straight pipe part of the heat pipe. Thermal resistance is generated and heat transfer efficiency is not good. Further, since a plurality of heat radiation fins are attached to one heat pipe, the heat radiation amount is not so large.

An object of the present invention is to provide a heat pipe type heat exchanger having high heat transfer efficiency and large heat radiation amount.

Means for Solving the Problems A heat exchanger according to the present invention includes a tubular body having a defective loop shape in a plan view and a tubular body having a plurality of channels extending in parallel in a vertical direction in the circumferential direction and having open both ends. The heat pipe is formed by the tubular body and the vertical header, which includes one vertical header attached to the defective portion in such a manner that all the flow paths communicate with each other, and the radiation fin attached to the inner surface of the tubular body. The heater is attached to a part of each of the front surface and the back surface of the outer surface of the cylindrical body corresponding to the liquid-phase working fluid sealed portion when not operating.

The heat pipe type heat exchanger according to the present invention has a tubular body having a defective loop shape in a plan view and a defective portion in the tubular body, the tubular body having a plurality of flow paths extending in a circumferential direction in parallel in the vertical direction and having both ends open. Is equipped with one vertical header attached so that all flow paths communicate with each other, and heat dissipation fins attached to the inner surface of the tubular body, and the tubular body and the vertical header form a heat pipe. Since a heater is attached to a part of each of the front surface and the back surface of the outer surface of the tubular body corresponding to the liquid phase working fluid sealed portion when not operating, the liquid phase working fluid sealed portion is the evaporation portion. In addition, the upper part becomes the condensing part. Then, when the liquid-phase working fluid in the evaporator is heated by the heater without interposing the heat transfer member, the liquid-phase working fluid immediately evaporates and becomes a vapor phase to reach from the lower flow path to the lower portion of the vertical header. Next, the vapor-phase working fluid rises up the vertical header, flows into the upper channel, reaches the condenser, radiates heat by the heat radiation fins attached to the inner surface of the tubular body, condenses in the condenser, and From the upper channel to the upper part of the vertical header. Subsequently, the liquid-phase working fluid descends down the vertical header, flows into the lower channel and returns to the evaporator. Repeat the above.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 to 4, a heat pipe type heat exchanger (1) according to the present invention has a plan view shape having 20 flow paths (2a) extending in a circumferential direction in a vertically parallel manner and open at both ends. The loop-shaped tubular body (2), one vertical header (3) attached so that all flow paths (2a) communicate with the defective portion of the tubular body (2), and the tubular body ( The heat radiation fins (4) are attached to the inner surface of (2).

The tubular body (2) here has a length of 57 mm × width of 400 mm × height of 85 mm, and has a planer shape of a substantially rectangular defect loop, and is a flat tube of 85 mm width and 5 mm thickness made of aluminum extruded profile. However, the end portions thereof are bent so that they face each other with an interval of 8 mm.

The vertical header (3) is a cylinder having a diameter of 16 mm and a height of 92 mm, and is made of an aluminum brazing sheet having a thickness of 1.3 mm. In addition, two radiating fins (4) are used, which are made of aluminum brazing sheet and have a corrugated shape. The aluminum fins (5) are 37 mm in length × 85 mm in width × 0.8 mm in thickness and are arranged in parallel in front and rear. Has been done.

Cylindrical body (2) and vertical header (3), cylindrical body (2) and radiating fins
(4), the radiating fins (4) and the partition plate (5) are all joined together by vacuum brazing.

The heat pipe working fluid (A) is enclosed in the six lower channels (2a) of the tubular body (2). This working fluid (A) is applied to the header cap (6) at the lower end of the header (3).
It is injected from a working fluid injection nozzle (7) which is attached in a downwardly protruding shape via.

On the other hand, on the outside of the cylinder of the tubular body (2), the operation that serves as the heat source of the heat pipe is provided on each of the front and the back of the portion corresponding to the sealed portion of the liquid phase working fluid (A) when not operating. A fluid heating heater (8) is attached. That is, the heater (8) is a plate-shaped PTC heater having a length of 30 mm, a width of 50 mm, and a thickness of 3 mm, and the working fluid (A) is enclosed in the cylinder outer surface of the cylinder (2). Two lower channels
In (2a), at the locations corresponding to the upper five flow paths (2a), two are symmetrically attached to the front and one is attached to the center of the back with an adhesive.

Effect of the Invention According to the heat pipe type heat exchanger of the present invention, the liquid-phase working fluid in the evaporator is heated by the heater without using the conventional heat transfer member for mounting the heater, so that the heat transfer efficiency is improved. Good.

Moreover, since the vapor-phase working fluid is heated by the radiation fins attached to the inner surface of the tubular body, the amount of radiation is large.

[Brief description of drawings]

1 to 4 show one embodiment of the present invention, FIG. 1 is an overall perspective view, FIG. 2 is a plan view, FIG. 3 is a right side view, and FIG. 4 is a view of FIG. It is an expanded sectional view which follows the IV-IV line. (2) …… Cylinder, (2a) …… Flow path, (3) …… Header, (4)…
… Radiation fin, (8) …… Heater, (A) …… Working fluid.

Claims (1)

[Scope of utility model registration request] 1. A tubular body (2), which has a plurality of flow channels (2a) extending vertically in parallel in the circumferential direction and open at both ends, and having a planar shape of a defect loop, and a tubular body (2). A vertical header (3) attached to the defective portion so that all the flow paths (2a) communicate with each other, and a heat radiation fin (4) attached to the inner surface of the tubular body (2), A heat pipe is formed by the tubular body (2) and the vertical header (3), and the front and back sides of the outer surface of the tubular body (2) corresponding to the liquid-phase working fluid sealed portion when not operating. Heat pipe type heat exchanger in which a heater (8) is attached to each part.