JPH0379949A - Heat pipe type heat exchanger for bathtub - Google Patents

Abstract

PURPOSE:To prevent the neat release at the stop time of combustion by a method wherein wicks are not used for heat pipes and the heat pipes, the inside surfaces of which are smooth and having little capillary phenomenon, are so installed that the heated side of the heat pipes is laid lower than their heat release side. CONSTITUTION:At a bathtub 1 iron-made heat pipes which use water as working fluid and have no wicks are installed in the condition of penetrating through the bathtub. Heat releasing parts 4 are plated by chromium, are arranged so that the heated side 6 of the heat pipes are laid downwards, and to the parts fins 11 to improve neat absorption effect are attached. City gas is burnt by a combustion burner 7 to heat the heated side of the heat pipes and combustion exhaust gas 10 is discharged outdoors from a chimney 8. At the heated heat pipes the working fluid starts to vapor ize and moves to the heat release side to heat water 2. Condensed working fluid returns back to the downward heated side by the gravity and heats repeatedly the water in the bathtub. Even though the heating by a bath furnace is stopped when the temp. of the water in the bathtub becomes proper, the heat pipes are not operated because wicks are not used for the pipes and the heat of hot water in the bathtub is not re leased from the parts of the bath furnace and the decrease in the temp. of the hot water in the bathtub can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a heat exchanger used in a bathtub or the like, and particularly relates to a heat exchanger that uses a heat pipe and has little heat dissipation effect when combustion is stopped.

[Conventional technology and its! ￥Title〕

Conventional heat exchangers for bathtubs are generally used in which the water in the bathtub is directly heated by combustion gas such as city gas within the bathtub through a gas/water heat exchanger in the bathtub. In this heat exchanger, the bathrobe on the heating side has ventilation holes and exhaust holes to take in air for combustion, and the bathrobe for indoor installation has a flue that guides the combustion exhaust gas outdoors. ing.

In conventional heat exchangers for bathtubs, when the water in the bathtub reaches a predetermined temperature and combustion ends, the ventilation holes suck in outside air due to the draft effect of the installed flue vents, etc. Therefore, it acts as a radiator, cooling the hot water in the bathtub that has reached a predetermined temperature, thereby lowering the temperature of the hot water. For this reason, this type of gas, water, and heat exchanger should be highly efficient, but considering the heat dissipation effect mentioned above, there was a problem that the efficiency could not be increased very much. [Problem to be solved by the invention] The present invention has been made as a result of studies on the above-mentioned problems, and has developed a heat pipe heat exchanger for bathtubs that does not have a heat dissipation effect during combustion and shutdown.

[Means for Solving the Problems] The present invention provides a heat pipe that does not use a wick, has a smooth inner surface, and has little capillary action, so that the heating side of the heat pipe is located below the heat radiation side. This is a heat pipe heat exchanger characterized by being arranged with an inclination or step.

That is, the present invention is a heat exchanger that uses a heat pipe, and this heat pipe does not use a wick, has a smooth inner surface, and has a small capillary action, and performs heat exchange. When assembled into a heat pipe, the heat pipe is arranged so that the heating side is located below the heat radiation side (with a slant or step).

The heat exchanger of the present invention as described above does not use a wick such as a mesh inside the heat pipe, and there is no wick such as a group on the inner surface.

In other words, because a heat pipe without capillary action is used, and because this heat pipe is arranged so that the heating side is located below the heat radiation side, during combustion, the water in the bathtub is heated by the action of the heat pipe. However, when the water in the bathtub reaches the appropriate temperature and combustion stops, the heat-vibrator goes into top mode, and since there is no wick, there is no capillary action, and the heat pipe does not operate and becomes shut off.

Therefore, the amount of heat from the hot water in the bathtub being radiated from the bathing suit is significantly reduced.

By providing fins on the heating side and/or the heat radiation side of the heat pipe, the heating and heat radiation effects during combustion can be improved.

Note that iron, copper, stainless steel, and other metals can be used as the material for the snake vibrator of the present invention, and water and other materials can be used as the working fluid.

Further, the present invention can be applied not only to bathtubs but also to devices where similar effects are expected.

(Example) An embodiment of the present invention will be described below.

As shown in Figure 1, the length is 1 m, the width is 80 cm, and the depth is 60 cm.
In the bathtub (1) of C11, iron heat pipes with a length of 134 m and a diameter of 25 au * φ and without a wick and using water as the working fluid were installed in two rows in the vertical direction and in five rows in the width direction, for a total of 10 heat pipes on the heat dissipation side (4 ) and the heat pipe heating side (6) were installed to penetrate the bathtub. In addition, a drainboard (3) is provided to cover the heat pipe inside the bathtub, and the heat pipe in the heat dissipation section is chrome-plated.9 The heat pipe that runs through the bathtub is stepped into the bathing suit, and placed so that the heating side is downward. is,
To enhance the heat dissipation effect, 60 fins 00 with a height of 10 strands and a thickness of 2 m+ are attached at a pitch of 5 strands. Inside the bathing suit, it is expelled to the outside.

In the heat pipe heated by combustion, the working fluid immediately begins to evaporate, rapidly moves to the heat radiation side, and heats the water (2). The condensed working fluid returns to the heating side below by gravity, repeating the same cycle to heat the water in the bathtub.

Even if the water in the bathtub reaches an appropriate temperature and the heating for moxibustion is stopped, the heat pipe does not operate because there is no wick in the heat pipe, and therefore the heat from the hot water in the bathtub radiates from the bathing suit. This prevents the water temperature from dropping.

〔effect〕

As explained above, according to the present invention, even when combustion is stopped, the temperature of the hot water in the bathtub decreases little, and therefore an energy-saving and efficient heat exchanger can be obtained, which has a remarkable industrial effect. It is something to play.

[Brief explanation of drawings]

FIG. 1 is a sectional view schematically showing a heat pipe heat exchanger for a bathtub, which is an embodiment of the present invention. 1...bathtub, 2...water, 3...slat, 4
... Heat pipe heat radiation side, 5... Working fluid, 6.
...Heat pipe heating side, 7...Combustion burner
8... Flue, 9... Wall, 10... Combustion exhaust gas, 11... Fin.

Claims (2)

[Claims] (1) A heat pipe that does not use a wick and has a smooth inner surface with little capillary action is arranged with a slope or step so that the heating side of the heat pipe is located below the heat radiation side. Features a heat pipe heat exchanger for bathtubs. (2) The heat pipe heat exchanger for a bathtub according to claim 1, characterized in that fins are provided on the heating side and/or the heat radiation side of the heat pipe.