JPS62196550A - Direct fire type water heater - Google Patents

Abstract

PURPOSE:To promote direct heat exchanging efficiency remarkably by a method wherein heat exchanging porous bodies are arranged at the upper and lower positions of a water feeding pipe so as to pinch the water feeding pipe from up-and-down directions while a moisture absorbing porous body is arranged in a heat absorbing chamber above a water spraying shower. CONSTITUTION:Hot combustion gas heats a water reserving tank 105 in a combustion chamber 104 and burns during passing through heat exchanging porous bodies 107, 107 having a large porosity, thereafter, is exhausted after passing through a moisture absorbing porous body 108. A water feeding pipe, wound and positioned between the heat exchanging porous bodies 107, 107, is heated also by the hot combustion gas. Cool water, passing through the water feeding pipe 106, becomes hot-water and is sprayed uniformly onto the heat exchanging porous body 107 by a water spraying shower 103, then, heat exchange between the water and the hot combustion gas, burning and flowing up through the heat exchanging porous bodies 107, 107, is effected and the hot-water becomes high-temperature hot-water, thereafter, overflows from a water reserving tank 105 and is supplied to a proper place while joining with the high-temperature hot-water, flowing down from the heat exchanging porous bodies 107, 107. Steam is absorbed by the moisture absorbing porous body 108 and is dewed, then, drops onto the heat exchanging porous body 107.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to the combustion that takes place inside the porous heat exchange body by dispersing hot water whose temperature has been increased to a certain degree from the start of hot water work onto the porous heat exchange body. It significantly promotes the efficiency of direct heat exchange with hot air, allowing you to instantly obtain hot water at a higher temperature, and also properly absorbs moisture, liquefies and removes steam generated by direct heat exchange with combustion hot air, and removes the steam. This invention relates to a direct-fired water heater that can prevent water from being directly discharged to the outside of the water heater.

Conventional technology A direct-fired water heater was disclosed in Japanese Utility Model Publication No. 57-28036 that can quickly turn cold water into hot water by bringing the hot combustion air from the field soil into direct contact with flowing cold water. As shown in FIG. 6, the configuration is as shown in FIG. The combustion chamber 4 is provided three-dimensionally as a water storage tank 5, and one end of the combustion chamber 6 is visible inside the combustion chamber 4, and the heat absorption chamber 2
Inside, there are multiple partitions 1 at intervals.
... is laid, and on the partition T is a heat-absorbing material 8, which is formed into a spongy shape so that the entire structure is highly flame permeable due to its heat-resistant and corrosion-resistant phase.
. . . are placed one after another on the inner wall of the water heater body 1 so that the periphery of the heat absorbing material 8 is brought into close contact with the heat absorbing material 8.・・・・・・
After the cold water is made into very high temperature hot water by making it come into direct contact evenly in the inside of the hot water tank, the high temperature hot water is supplied to an appropriate place from a funnel-shaped saucer 9 through a hot water supply pipe 10.

Problems to be Solved by the Invention Incidentally, in the above-mentioned publicly known direct-fired water heater, the water sprayed onto the heat-absorbing material from the sprinkler shower is room-temperature cold water that has not been heated by equivalent combustion hot air. Therefore, no matter how high the heat exchange efficiency between the heat absorbing material and the hot combustion air is, it is probably a lie that a large volume of cold water cannot be instantly converted into hot water by a single flowing action. A large amount of steam was generated during direct heat exchange with the exhaust pipe, and as this steam was directly exhausted from the exhaust stack, the steam condensed and liquefied water droplets dripped from the end of the exhaust stack as a drain. However, there was a drawback that the durability of the water heater was impaired.

Means for Solving the Problems The present invention #'i solves all of the above-mentioned problems, and its structure will be explained below with reference to FIGS. 1 to 3 corresponding to embodiments. That is, a heat absorption chamber 102 in which a sprinkler shower 103 is arranged is provided in the upper stage of the water heater main body 101, and a combustion chamber 104 surrounded by a water storage tank 105 is provided in the lower stage of the water heater main body 101. In the endothermic chamber 102, water supply pipes 106 connected to the sprinkler shower 103 at their tips are wound around 11t in a plurality of stages so as to be adjacent to each other.

A heat exchange porous body i07, 107 with a large porosity is installed at a position below -L of the water supply pipe 106 placed in the same manner on the right t6 so as to sandwich the water supply pipe 106 from below.

From the water shower 103 mentioned above - [some of the heat absorption chambers 10
Inside the heat exchange porous body 107, a large amount of steam generated by the direct heat exchange between hot water and combustion hot air is absorbed and condensed, and the liquefied water droplets are transferred to the heat exchange porous body 1.
Moisture-absorbing porous body 1 with large porosity for dripping onto 07
08 is arranged.

Operation Now, if the hot combustion air is blown into the combustion chamber 104 and caused to flame-1-, the hot combustion air will intensely heat the water storage W1105 and absorb heat from the large porosity installed in the heat absorption chamber 102. The exchange porous body 107, t07 is filled with field soil while twisting and turning, and then passed through the moisture absorbing porous body 108 to the water heater main body 10.
1 Exhausted outside.

As a result, the heat exchange porous body 10
The water supply pipe 106 wound between 7 and 107 is also heated. Therefore, if cold water is supplied into the water supply pipe 106, the cold water passing through the water supply pipe 106 becomes hot water due to the heating effect of the combustion hot air in the field soil, and is evenly sprayed onto the heat exchange porous body 107 by the sprinkler shower 103. .

Then, the sprayed hot water is transferred to the heat exchange porous body 1 with a large porosity.
While flowing slowly along the porous surfaces of the heat exchange porous bodies 107 and 107, the hot water is in constant direct contact with the hot combustion air in the field soil, efficiently exchanging heat, and becomes hot water, some of which is stored. After the person falls into the tank 105 and the temperature rises due to the indirect heating effect of the hot combustion air in the field soil, it overflows from the water storage tank 105 and enters the heat exchange porous bodies 107 and 1.
Hot water is supplied to appropriate locations while being combined with high-temperature hot water that directly flows down from 07.

Therefore, from the start of hot water work, the sprinkler shower 103
Due to the dispersion of hot water and the direct heat exchange action of the heat exchange porous bodies 107, 107 with large porosity, a large volume of hot water can be obtained instantaneously.

Furthermore, due to the direct heat exchange between the hot water and the combustion hot air through the heat exchange porous bodies 107, the exhaust hot air after passing through the heat exchange porous body 107 absorbs heat and is lowered in temperature. When a large amount of steam passes through the moisture absorption porous body 108 together with the exhaust heat, it absorbs moisture and condenses, allowing liquefied water droplets to drip onto the heat exchange porous body 107. Direct hot water body 1
01 can be prevented from being exhausted outside.

Embodiments Below, embodiments of the direct-fired water heater according to the first part of the present invention will be described.

In FIGS. 1 to 3, 101 is a cylindrical water heater body with a cross-sectional shape of a rectangle, a rectangular cylinder, a square or polygon, etc., and a sprinkler shower 103 is provided in the upper part of the water heater body 101. In addition to providing an endothermic chamber 102 in which
A combustion chamber 104 surrounded by a water tank 105 is provided at the lower stage of the water heater main body 101. In the heat absorption chamber 102, a water supply pipe 106 whose tip end is connected to the sprinkler shower 103 is wound in a plurality of stages so as to be adjacent to each other. Heat exchange porous bodies 107, 107 are installed above and below the water supply pipe 106 arranged in a winding manner so as to sandwich the water supply pipe 106 from above and below.

The heat exchange porous body 107 described above has a large surface area and has a three-dimensional network structure to increase the contact reaction rate. For example, it is a ceramic made of Everite Scotto (trade name) as a base material, coated with a ceramic raw material, and fired. A porous aluminum or porous stainless steel material is used, which is made by pouring molten aluminum or stainless steel into a porous material or polyurethane sponge and molding it with a special agent.This heat exchange porous material is formed to have a significant porosity. .

Reference numeral 108 denotes a moisture absorption porous body formed with substantially the same configuration as the heat exchange porous body 107, and the moisture absorption porous body 108 blocks the heat absorption chamber 102 in the heat absorption chamber 102 located above the water spray shower 103. Due to the direct heat exchange between the hot water flowing through the moisture absorbing porous body 108F'i heat exchange porous body 101 and the hot combustion air in the field soil, a large amount of steam generated becomes low temperature. Moisture-absorbing porous body 1
08, the steam condenses and liquefies, causing water droplets to drip onto the heat exchange porous body 107, thereby preventing the steam from being directly exhausted to the outside through the exhaust window 109 together with the exhaust heat. It is something. 110 is a suction/exhaust device attached to the exhaust window 109.

The upper edge of the hot water storage tank 105 described above is bent slightly toward the center so that the hot water flowing down from the heat exchange porous body 107 is stored. 111 Tit is a burner disposed within the combustion chamber 104, and the combustion hot air is directed toward the heat exchange porous body 107 and directed to the field soil. 112, the upper edge of the hot water storage tank 105 is bent inward and downward to form a flame passage 11 in the center.
3, which is a funnel-shaped saucer disposed directly below the flame passageway 113, and one end of the hot water supply pipe 114 is connected to the lower part of the funnel-shaped saucer 112 to receive high-temperature hot water flowing down from the heat absorption chamber 102. The high temperature hot water overflowing from the hot water storage tank 105 is stopped from being received and the hot water is supplied to an appropriate place.

Therefore, in the direct-fired water heater of the above embodiment, when starting the water heater, the suction exhaust device 110 and the burner 114
When the hot water tank 105 is operated, the hot combustion air heats the hot water tank 105 and spreads over the field soil, and then passes through the heat exchange porous bodies 10 arranged in multiple stages.
7, 107 flows smoothly, and finally the moisture absorbing porous body 1
08 and is exhausted to the outside of the chamber through the exhaust window 109 by the suction exhaust device 110. Therefore, the heat exchange porous bodies 107, 107 and the water supply pipe 106 are heated by the action of the hot combustion air. Therefore, if cold water is supplied into the water supply pipe 106, the cold water will turn into hot water due to the heating action, and the sprinkler shower 1
03, the hot water is evenly spread on the heat exchange porous body 107, and while the hot water is slowly flowing down sequentially along the porous surface of the heat exchange porous body 107, it is brought into direct contact with the circulating hot combustion air and is effectively Heat exchange is performed, and the hot water becomes high temperature, and some of it is stored in the hot water tank 105.
In addition, the other directly passes through the flame passage 113 into the funnel-shaped saucer 112.
flowed down to.

Therefore, the hot water that has reached a high temperature in the heat exchange porous body 107 is
Furthermore, since the hot water is heated in the hot water storage tank 105, the flame passage 113, and the funnel-shaped saucer 112, the hot water becomes even hotter and is supplied to an appropriate location via the hot water supply pipe 114.

During the hot water work, the heat exchange porous body 107
A large amount of steam generated by the heat exchange action performed inside condenses and liquefies when passing through the moisture absorbing porous body 108 together with the low temperature exhaust heat air, becoming water droplets and flowing into the heat absorbing chamber 102.
Only the exhaust hot air is exhausted from the exhaust window 109 to the outside of the chamber by the suction exhaust device 110. Therefore, even if the hot water operation described above is continued for a long period of time, steam is not exhausted outside the water heater main body 101, so that the hot water operation can be continued satisfactorily for a long period of time.

The direct-fired water heater of the embodiment shown in FIGS. 4 and 5 has a horizontal burner 111', and IL,! Water phase body 101
It is removably attached to the lower side of the combustion chamber 104 to allow hot combustion air to flow into the combustion chamber 104 from the side.
A funnel-shaped saucer 112' with an open upper surface is disposed directly below the tray 04. The upper end edge of the hot water storage tank 105 is bent inwardly, and a heat exchange porous body 107 is disposed on the L edge 1-. A hot water supply pipe 114' is open-connected to the center of the bottom of the tank.

Therefore, in the second embodiment, since the combustion chamber 104 is located between the heat absorption chamber 2 and the funnel-shaped saucer 112', the high temperature hot water j2 flowing down from the heat exchange porous body 107
・The high temperature hot water overflowing from the hot water storage tank 105 is transferred to the combustion chamber 10.
4, it comes into direct contact with the hot air from the combustion in the field soil, and becomes hot water with a height of 11.4, which flows into the funnel-shaped saucer 11.
The configuration other than the person falling into the water heater 2' is the same as the direct-fired water heater 101 described in the first embodiment.

Effects of the Invention In short, the present invention has the above-mentioned technical means, so that the cold water Vi supplied into the water supply pipe 106 at the start of hot water work, and the combustion chamber 10 while reaching the sprinkler shower 103.
4, hot water can be made into hot water by the heating effect of the hot combustion air flowing through the field soil through the inside of the heat exchange porous body 107, and the hot water sprayed from the sprinkler shower 103 can be heated to the heat exchange porous body 107.
As the hot water flows slowly down along the porous surface of the field, it quickly absorbs heat through direct heat exchange with the hot combustion air in the field soil, and is instantly stored in the hot water storage tank 105 as high-temperature hot water, and the temperature is further increased. The large amount of steam generated by the direct heat exchange between the hot water and the hot combustion air is transferred to the heat absorption chamber 102 together with the exhaust heat whose temperature has been lowered by the direct heat exchange action.
rises, and while flowing through the moisture absorbing porous body 108, the steam absorbs moisture and condenses, and the liquefied water droplets are transferred to the heat exchange porous body 107f-
to prevent a large amount of steam from being exhausted outside the water heater main body 1.
This has the effect of increasing the durability of the material.

[Brief explanation of drawings]

The drawings show an embodiment of the direct-fired water heater according to the present invention, in which FIG. 1 is a front view with main parts cut away, and FIG.
In the side cross section in the direction of arrow A-A, FIG. 3 is a plan view of the heat exchange porous body, and FIGS. 4 and 5 show the direct-fired water heater on the other side. 5 is a side sectional view taken along the line B--B in FIG. 4, and FIG. 6 is a diagram of a conventional example of a direct-fired water heater.

Claims (1)

[Claims] A heat absorption chamber with a sprinkler shower installed on the upper level of the water heater body.
A combustion chamber surrounded by a hot water storage tank is provided in the lower stage, and one end of the burner is visible inside the combustion chamber, and the end of the heat absorption chamber is connected to a water supply pipe connected to a sprinkler shower in multiple stages. At the same time, water supply pipes are arranged above and below the water supply pipe, heat exchange porous bodies are arranged between the water supply pipes from above and below, and moisture absorption porous bodies are arranged in the heat absorption chamber above the sprinkler shower. A direct-fired water heater featuring the following.