JPS5839328Y2 - small heating device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a small heating device.

In conventional heating systems that use high-temperature water as a heat source,
The heat exchange efficiency in heating water to obtain high-temperature water is low, and therefore the energy efficiency is low, so the device must be large to achieve the required heating, and it also has the disadvantage of requiring a large amount of thermal energy. .

The present invention eliminates the above-mentioned drawbacks and provides a small-sized heating device that has very high heat exchange efficiency and is therefore economical.

An example of implementing the present invention will be described below with reference to the drawings.

In the present invention, as shown in the figure, a heating water heating iron 1 is made up of an inner circumferential wall 1A, an inner end wall IB, an IC1 outer circumferential wall 1D, and outer end walls IE and IF, and whose upper end is open to the atmosphere.
The inner circumferential wall 1A and inner end walls IB and IC are provided so as to surround the combustion chamber 2.

In this combustion chamber 2, a first or outer cylindrical flow path 3 made of a double cylinder structure is provided so as to extend in the axial direction from one inner end wall 1B of the can 1. 1 inner peripheral wall 1
A, and a coaxial space 4 is formed between the inner end wall 1C of the can 1 and the space surrounded by the inner peripheral surface of the first cylindrical flow path 3. A second or inner cylindrical flow path 5 made of a double cylindrical structure is provided so as to extend into a second cylindrical space 5, which communicates with the first cylindrical space 4 on the other inner end wall 1C side. A cylindrical space 6 is formed between the first cylindrical flow path 3 and the second cylindrical flow path 5, and a central space surrounded by the inner peripheral surface of the second cylindrical flow path 5. 7 to the second cylindrical space 6 on the one inner end wall 1B side.
Communicate with.

The first cylindrical flow path 3 and the second cylindrical flow path 5 are communicated with the inside of the can 1 through a communication pipe 8 at their upper portions.

A burner 9 is provided toward the central space 7 from the other inner end wall 1C side.

Further, a water supply pipe 10 having an inlet opening inserted into the communication pipe 8 is provided, a pump 11 is inserted therein, and the outlet opening of the water supply pipe 10 is communicated with the lower part of the line 1 to generate a circulating flow. Form a path.

Further, on the downstream side of the pump 11, a branch pipe 13 is provided which branches off by a switching valve 12 inserted into the water pipe 10, and is connected to a hot water supply port of the heating element 14, and a drain port is connected to the water pipe 10. Connect the returning drain pipe 15.

In addition, a spiral heat exchange tube 16 is disposed vertically in the space between the inner end walls IB, IC and the outer end walls IE, IF of the line 1, and the upper end thereof is connected to an external water supply source such as water supply (Fig. (not shown), and the other end is connected to a hot water supply faucet 18 provided outside the can 1.

In addition, 19 is a valve mechanism inserted in the water supply pipe 17, and 20 is the water supply pipe 1.
The can water supply pipe branches from 7, 21 is a float for adjusting the amount of water in the can, and 22 is a chimney provided in communication with the first cylindrical space 4 on the one inner end wall 1B side.

Since the device of the present invention has the above-described configuration, the water in the can 1 is heated by the heat of the flame from the burner 9 through the inner circumferential wall 1A and the side inner end walls IB and IC of the can 1. The water inside is forced to flow out from the first and second cylindrical channels 3.5 through the water pipe 10 by the pump 11, and is sent to the heating element 14, where it is used for heating.

The water from the drain pipe 15 is returned to the can 1, and within this can 1, part of the water in particular is heated in the two cylindrical channels 3 and 5, and then flows out from the water pipe 10 again. , is circulated.

In the present invention, since the inside of the combustion chamber 2 is divided by the first and second cylindrical flow paths 3 and 5, the hot air from the flame from the burner 9 flows into the central space 7 as shown by the arrow. flows toward one inner end wall 1B, then changes direction and flows through the second cylindrical space 6 toward the other inner end wall 1C, then changes direction again and flows through the first cylindrical space 4. It flows and is discharged from the chimney 22.

In other words, the hot air passage is long, and this passage is connected to the inner peripheral wall 1 of the can 1.
A, side inner end wall I B, I C1 90% because it is partitioned by the first cylindrical flow path 3 and the second cylindrical flow path 5
The water in the can 1 can be heated with the extremely high efficiency described above, and as a result, together with the water being circulated as described above, the heat utilization rate can be greatly improved.

In order to achieve this circulation efficiently, the inlet opening of the water pipe 10 is located at a position suitable for sucking the water in both the cylindrical channels 3 and 5.

Note that the flow velocity in the cylindrical channels 3 and 5 is approximately 1.0 to 2.0 m7.
It is preferable to set the time to 2 seconds because it is possible to prevent water from boiling in the cylindrical channels 3 and 5, and therefore to prevent a decrease in heat exchange efficiency due to the mixture of gases.

In addition, inside the can 1, water from the water pipe 10 spouts out at the lower part, and since the inlet of the water pipe 10 is located at the upper part of the whole can 1, it is not only caused by the pressure caused by the pump 11 but also by the temperature difference of the water. The upward convection within the can 1 is promoted, and as a result, the water within the can 1 is heated uniformly and efficiently.

In addition, the water supplied through the water supply pipe 17 is transferred to the spiral heat exchange pipe 1.
6 is heated by the high temperature water in the can 1, hot water can be supplied from the faucet 18, and the water flowing through the heat exchange tube 16 is not heated forcefully as described above. Since this is achieved by the high-temperature water in the can 1 that is in a fluidized and agitated state, it is possible to maintain a high heat exchange efficiency, and together with the spiral shape of the heat exchange tube 16, the efficiency is high. Hot water supply can be achieved.

Of course, the arrangement of these heat exchange tubes 16 and the like is arbitrary.

In addition, in the device of the present invention, the cross-sectional area of the hot air flow path in the space portions Sl and S2 that communicate the central space 7 and the second cylindrical space 6 and the second cylindrical space 6 and the first cylindrical space 4, respectively. By making , for example, two to three times larger than the cross-sectional area of the hot air flow path in the second cylindrical space 6, it is possible to reduce the speed of the hot air flow in the communication space portions Sl and S2, and as a result, the burner 9 It is possible to obtain a silencing effect that significantly reduces the noise generated by this, and also to absorb and eliminate so-called flashback when it occurs.

In order to obtain the effects of the present invention described above, each cylindrical channel 3
, 5, it is also possible to use a cylindrical spiral tube as a whole with adjacent tubes in close contact with each other. In this case, it is possible to increase the heat transfer area for heating the forcedly circulated water. can.

However, when this spiral tube is used, since the surface has irregularities, soot that reduces heat transfer efficiency tends to adhere and accumulate, making it difficult to clean, and also requiring a large pump 11 for circulation. Furthermore, since the water in this spiral pipe cannot be completely removed and water remains at the bottom of each coil, there is a risk of freezing in the winter and causing accidents such as pipe bursting. .

On the other hand, if the cylindrical channels 3 and 5 are constructed of a double cylindrical structure made of circular pipes as shown in the figure, such a problem will not occur, and the water circulation will be improved because the resistance to the flow of water will be reduced. can be achieved smoothly, the small heat transfer area can be compensated for, a small pump 11 can be used, and the pump 11 can be shared in order to supply hot water to the heating element 14. is obtained.

Further, by arranging the heat exchange tubes 16 so as to extend vertically, the internal water can be easily and completely removed by gravity, and accidents caused by freezing of the internal water in winter can also be prevented.

As described above, according to the present invention, with an extremely simple configuration,
Heating of water to obtain high-temperature water for heating and heating of water for hot water supply using this high-temperature water can be achieved with extremely high efficiency, and as a result, equipment with the required capacity can be made extremely compact. It is possible to easily make it into a size and shape that can be stored in the space under a sink in a general household, and the energy required can be reduced and a small burner can be used. Furthermore, since the hot water supply system is separated from the heating system, great benefits can be obtained, such as preventing uneconomical operation of the burner even when only hot water is being supplied.

[Brief explanation of drawings]

The figure is an explanatory sectional view showing the configuration of an embodiment of the small heating device of the present invention. 1...Water heating edge, 2...Combustion chamber, 3,
5... Cylindrical flow path, 4.6... Cylindrical space, 7... Central space, 9... Burner,
10... Water pipe, 11... Pump, 1
4... Heating element, 16... Spiral heat exchange pipe, 17... Water supply pipe, 18...
・Faucet, 22...Chimney.

Claims (1)

[Scope of utility model registration request] Inner peripheral wall 1A, outer peripheral wall 1D, inner end wall IB, IC and outer end wall I
A heating water heating iron 1 having a double wall structure consisting of E and IF, with a water tank formed between the walls and surrounding the combustion chamber 2 by the inner circumferential wall; The end faces of each of the inner end walls IC, 1 of the heating iron 1 are respectively
coaxial inner and outer cylindrical channels 5 and 3 communicating with B; and a communication pipe 8 that directly communicates the upper parts of the inner and outer cylindrical channels 5 and 3 with the upper part of the water heating edge 1, respectively. , a water pipe 10 communicating between the upper and lower parts of the inner and outer cylindrical channels 5 and 3, respectively, via the lower part of the water heating wire 1; a pump 11 inserted in the water pipe 10; It consists of one burner provided in a space surrounded by the inner cylindrical flow path 5, and connects the space surrounded by the inner cylindrical flow path 5 and the space surrounded by the inner and outer cylindrical flow paths 5, 3. A space S that communicates the cross-sectional area of the space S1 and the space surrounded by the inner and outer cylindrical channels 5 and 3 with the space surrounded by the outer cylindrical channel 3 and the inner circumferential wall of the water heating wire 1;
A small heating device characterized in that the cross-sectional area of the inner and outer cylindrical channels 5 and 3 is at least twice the cross-sectional area of the space surrounded by the inner and outer cylindrical channels 5 and 3.