JP3699311B2 - Drain water storage container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drain water storage container for recovering drain water generated by a latent heat recovery type heat exchanger in a combustion apparatus (gas appliance, petroleum appliance, etc.) such as a water heater and a hot water circulation heater. .
[0002]
[Prior art]
As shown in FIG. 5, for example, as a heat exchanger that improves the efficiency of heat exchange from combustion exhaust in a combustion apparatus (gas appliance) 20 such as a hot water heater or a hot water circulation heater, a lower part of a gas burner 4 is used. There is a configuration in which the main heat exchanger 5 and the auxiliary heat exchanger 6 are arranged in two stages. The main heat exchanger 5 and the sub heat exchanger 6 are composed of water pipes 51 and 61 and a large number of fins 52 and 62 provided on the outer periphery thereof. According to this, sensible heat is first absorbed by the main heat exchanger 5 from the combustion exhaust produced by the combustion of the gas burner 4, and then latent heat is generated from the combustion exhaust cooled by the main heat exchanger 5 by the auxiliary heat exchanger 6. Endotherm. The combustion exhaust gas that has passed through the auxiliary heat exchanger 6 is exhausted out of the gas appliance 20 through the combustion exhaust passage 32. Thus, since sensible heat and latent heat are absorbed from the combustion exhaust generated by the combustion of the gas burner 4, heat exchange is efficiently performed.
[0003]
The auxiliary heat exchanger 6 absorbs the latent heat of the combustion exhaust and is cooled below the dew point to generate drain water 64. The drain water 64 generated here is provided below the auxiliary heat exchanger 6. It is collected in the drain receiver 33 and drained out of the instrument 20 through the drain pipe 80 through the drain pipe 9. Since the drain receiver 33 is provided in the combustion exhaust passage 32 due to the configuration of the heat exchangers 5 and 6, the drain pipe 80 is a U-shaped pipe so that the combustion exhaust does not enter the drain pipe 9 side. It is configured to be sealed with water.
[0004]
[Problems to be solved by the invention]
However, in the unlikely event that the drain pipe 9 is clogged, the drain water 64 will not be drained, so the drain water 64 may leak into the device 20 from the connection between the drain pipe 80 and the drain receiver 33, or even drain. The drain water 64 accumulates in the receptacle 33 and closes the combustion exhaust passage 32. Then, since the drain water 64 absorbs sulfur oxides, nitrogen oxides and the like in the combustion exhaust gas and is an acidic liquid having a pH of about 4, the drain gas 64 leaking into the instrument 20 causes the metal gas appliance 20 to be removed. It will be corroded. Further, if the combustion exhaust passage 32 is blocked, the combustion exhaust is not exhausted, so that there is a problem that the gas burner 4 causes a combustion failure.
[0005]
The present invention provides a “drain water storage container for discharging drain water in a drain receiver provided in a combustion exhaust passage in a combustion apparatus having a latent heat recovery type heat exchanger through a drain pipe and storing the discharged drain water”. As a problem, it is necessary to seal the drain water drainage path so that combustion exhaust does not enter the drainage pipe side, and to discharge drain water outside the combustion device even if the drainage pipe is clogged. To do.
[0006]
[Means for Solving the Problems]
The technical means of the present invention taken to solve the above-described problems are as follows.
“A first chamber in which the drain pipe is inserted and a second chamber in which a drain port connected to a drain pipe leading to a sewer is formed in the bottom by a partition wall raised from the bottom surface in the drain water storage container. And is divided into
The first chamber is arranged at a position where the lower end portion of the drain pipe is lower than the partition wall and does not reach the bottom surface,
The second chamber is provided with an auxiliary chamber surrounded by an overflow wall having a height lower than the partition wall in an area where the drain outlet is not formed, and opened to the bottom of the auxiliary chamber outside the instrument. A drain discharge port is formed. 』
The technical means operates as follows.
[0007]
Since the lower end of the drain pipe is arranged at a position lower than the partition wall and does not reach the bottom surface of the first chamber, the lower end of the drain pipe is filled with drain water when the combustion apparatus is used. Submerge. Thus, the first chamber functions as a water seal chamber for sealing the drain pipe, and the combustion exhaust gas is reliably exhausted from the exhaust port without entering the drain pipe side from the combustion exhaust passage.
[0008]
On the other hand, drain water is stored in the first chamber through the drain pipe, but overflows into the second chamber when the water level exceeds the partition wall. The drain water overflowing into the second chamber is discharged to the drain pipe through the drain port. If the drain pipe is clogged, the second chamber is filled with drain water, but the second chamber is provided with an auxiliary chamber surrounded by an overflow wall having a height lower than that of the partition wall. Therefore, when the water level exceeds the overflow wall, it overflows into the auxiliary chamber. Then, drain water overflowing into the auxiliary chamber is drained out of the combustion device through the drain discharge port.
[0009]
Further, as a second means, “a drainage port connected to a drainage pipe leading to the sewer and a first chamber in which the drain pipe is inserted by a partition wall raised from the bottom surface inside the drain water storage container. Divided into a second chamber formed at the bottom,
The first chamber is arranged at a position where the lower end portion of the drain pipe is lower than the partition wall and does not reach the bottom surface,
The second chamber has a drain discharge port opened outside the combustion device at a lower height than the partition wall on the outer wall of the drain water storage container surrounding the second chamber. Even if the drain pipe is clogged, if the drain water level reaches the drain outlet, the drain water is drained from the drain outlet to the outside of the combustion apparatus.
[0010]
In each of the above means, “the first chamber or the second chamber becomes a neutralization chamber in which a water supply connecting pipe for supplying tap water for neutralizing drain water is disposed above” is used. Water is mixed with tap water and neutralized in the first chamber or the second chamber and then drained out of the combustion device through the drainage pipe. Therefore, metal products used for drainage pipes and sewer pipes are not corroded or cause water pollution.
[0011]
【The invention's effect】
As described above, according to the present invention, even when the drain pipe is clogged, the drain water is discharged from the drain outlet of the auxiliary chamber to the outside of the combustion device, so that the drain water flows into the combustion device. In addition, it is possible to prevent drain water from accumulating in the drain receiver and blocking the combustion exhaust passage. Therefore, the combustion apparatus is not corroded by the drain water flowing into the combustion apparatus, and the combustion apparatus does not cause a combustion failure due to the blockage of the combustion exhaust passage.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic view showing a gas appliance 2 (for example, a water heater or a hot water circulation heater) as a combustion apparatus having a latent heat recovery type heat exchanger equipped with a drain water storage container 1 according to the present embodiment. It is.
[0013]
A gas appliance 2 shown in FIG. 1 includes a gas burner 4 arranged at the upper part of a can body 3 and having a flame hole portion 42 set downward, and a main heat exchanger 5 and a sub heat exchanger 6 in the lower can body 3. Has a configuration arranged in two stages.
[0014]
Gas is supplied to the air supply chamber 41 of the gas burner 4 with the gas nozzle 43 facing. A fan 7 is provided in the upper part of the air supply chamber 41, and when the fan 7 is driven, air is introduced from the air supply port 21 in the lower part of the gas appliance 2 and supplied into the air supply chamber 41. The combustion exhaust gas generated by burning the gas burner 4 passes through the main heat exchanger 5 and the auxiliary heat exchanger 6 in the can body 3 and passes through the combustion exhaust passage 32 connected to the bottom of the can body 3. The gas appliance 2 is exhausted outside.
[0015]
The main heat exchanger 5 and the sub heat exchanger 6 are each composed of water pipes 51 and 61 and a large number of fins 52 and 62 provided on the outer periphery thereof. The water pipes 51 and 61 are pipes that are arranged in a meandering manner in the can 3 to introduce water to be heat-exchanged by the gas appliance 2, and are arranged along the outer periphery of the can 3. It is connected to the water pipe 31 and one. Further, the sub heat exchanger 6 is provided with a rectifying plate 63 between the upper water pipe 61 and the lower water pipe 61, thereby guiding the entire combustion exhaust toward the lower water pipe 61. As a result, the endothermic efficiency is improved. The sensible heat is absorbed by the main heat exchanger 5 from the combustion exhaust generated by the combustion of the gas burner 4 and the latent heat is absorbed by the auxiliary heat exchanger 6. Thereby, the water which flows through the said water flow pipes 51 and 61 is efficiently converted into warm water.
[0016]
On the other hand, when the auxiliary heat exchanger 6 absorbs latent heat from the combustion exhaust gas, the water vapor is condensed and drain water 64 is generated. Therefore, in order to collect the drain water 64, the auxiliary heat exchange in the combustion exhaust passage 32 is performed. A drain receiver 33 is provided in the lower part of the vessel 6. And the drain water storage container 1 which concerns on this Embodiment is attached to the lower part of the said drain receptacle 33. FIG. As this drain water storage container 1, it forms from synthetic resins, such as PET, for example.
[0017]
FIG. 2 shows a plan view of the drain water storage container 1 with the lid 10 removed.
As shown in FIGS. 1 and 2, the drain water storage container 1 has a rectangular parallelepiped shape as a whole, and a lid 10 is attached to the upper part. The drain storage container 1 is divided into a water seal chamber 11 (first chamber) and a neutralization chamber 12 (second chamber) by a partition wall 14 formed to rise from the bottom surface to a predetermined height. .
[0018]
In the water sealing chamber 11, a drain pipe 8 attached to the bottom of the drain receiver 33 is inserted from above. The drain pipe 8 is disposed at a position where the lower end portion is lower than the partition wall 14 and does not reach the bottom surface of the drain storage container 1, and when the water seal chamber 11 is filled with drain water 64 when the instrument is used, The lower end portion of the drain pipe 8 is submerged. As a result, since the water seal chamber 11 seals the drain pipe 8, the combustion exhaust gas is exhausted from the exhaust port 22 without entering the drain pipe 8 side from the combustion exhaust passage 32. Although the height of the partition wall 14 varies depending on the combustion capacity of the gas appliance 2 and the diameter of the drain pipe 8, etc., the water sealing function is generally achieved if the height is about 45 mm. In other words, when the water seal chamber 11 is filled with drain water 64, the water level is maintained at about 45 mm, so that the combustion exhaust does not enter the drain pipe 8 against the head pressure of the drain water 64. The air is exhausted from the port 22. The water seal chamber 11 is provided with a water drain plug 16 at the bottom. The water drain plug 16 is always closed when the gas appliance is used, but the water drain plug is used to prevent freezing when the gas appliance is not used in cold weather. 16 is opened to drain the drain water 64 accumulated in the water seal chamber 11. However, when there is no concern about cold, the water drain plug 16 is not particularly required.
[0019]
The neutralization chamber 12 has a drain port 17 formed at the bottom, and the drain port 17 is connected to a drain pipe 9 leading to the sewer. That is, the drain water 64 generated in the auxiliary heat exchanger 6 when using the gas appliance is stored in the water seal chamber 11 through the drain receiver 33 and the drain pipe 8, but when the water level exceeds the partition wall 14, It overflows into the neutralization chamber 12. The drain water 64 overflowing into the neutralization chamber 12 is drained from the drain pipe 9 through the drain port 17. Thereby, the water sealing chamber 12 can be filled with the drain water 64 up to the partition wall 14 at least when the gas appliance is used, and can perform the water sealing function. The neutralization chamber 12 overflows and is drained from the neutralization chamber 12 to the outside of the gas appliance 2 through the drain port 17. The neutralization chamber 12 faces the water supply communication pipe 81 from above, and a predetermined amount of tap water is supplied from here. As described above, the drain water 64 absorbs sulfur oxides, nitrogen oxides and the like in the combustion exhaust gas and is an acidic liquid having a pH of about 4. Therefore, if drained as it is, it may cause corrosion of metal drainage pipes and sewer pipes, deterioration of concrete buildings, or cause problems such as water pollution. It is preferable to neutralize and drain the water so that Therefore, a predetermined amount of tap water is supplied to the neutralization chamber 12 from the water supply communication pipe 81, and the drain water 64 is mixed with the tap water to be neutralized and then drained. However, in the case where a piping path is formed in which the drain water 64 is combined with other miscellaneous drainage and then flows into the sewer, the drain water 64 is considered to be sufficiently neutralized by miscellaneous drainage. From the viewpoint of saving water, the neutralization treatment is not particularly required. In such a case, naturally, the water supply communication pipe 81 is not necessary.
[0020]
Further, the neutralization chamber 12 is provided with an auxiliary chamber 13 surrounded by an overflow wall 15 having a height lower than that of the partition wall 14 in an area where the drain port 17 is not formed. The auxiliary chamber 13 has a drain outlet 18 formed at the bottom. The drain discharge port 18 may be left open as in the present embodiment, or connected to the sewer via a drainage pipe different from the drainage pipe 9 connected to the drainage port 17. Alternatively, a drain hose may be connected and guided to a predetermined position. Further, when the drain discharge port 18 is opened as it is, a container may be disposed immediately below it to receive the drain water 64.
[0021]
As long as the drain water 64 is normally drained from the neutralization chamber 12, the drain water 64 does not flow into the auxiliary chamber 13. However, when the drain pipe 9 is clogged, the drain water 64 is not normally drained from the neutralization chamber 12. Then, the neutralization chamber 12 is filled with drain water 64 and tap water from the water supply connection pipe 81, but the overflow wall 15 is set at a lower height than the partition wall 14. Spills over the overflow wall 15 and overflows into the auxiliary chamber 13. The drain water 64 overflowing into the auxiliary chamber 13 is drained out of the gas appliance 2 through the drain discharge port 18.
[0022]
As described above, according to the present embodiment, even if the drain pipe 9 is clogged, the drain water 64 is drained out of the gas appliance 2 from the drain outlet 18 of the auxiliary chamber 13. It can be prevented from overflowing from the drain water storage container 1 and flowing into the gas appliance 2, or being accumulated in the drain receiver 33 and blocking the combustion exhaust passage 32, and corroding the metal gas appliance 2 or combustion exhaust. The combustion failure of the gas appliance 2 due to the blockage of the passage 32 does not occur. In addition, the user notices that water is flowing out from the drain discharge port 18 and understands that the drain pipe 9 is clogged. Therefore, the drainage pipe 9 can be immediately returned to a normal state by cleaning the clogging.
[0023]
In addition, the drain water storage container which concerns on this invention is not restricted to the said embodiment. For example, as shown in FIG. 3, the neutralization chamber 12 a has a drain discharge port opened to the outside of the instrument 2 by connecting a drain hose 83 at a height lower than the partition wall 14 in the outer wall 100 of the container 1 a surrounding the neutralization chamber 12 a. What formed 18a may be used. Even in this case, if the drain pipe 9 is clogged, when the water level of the drain water 64 in the neutralization chamber 12a reaches the drain discharge port 18a, the drain water 64 is gasified from the drain discharge port 18a through the drain hose 83. It is discharged out of the instrument 2. In this case as well, the drain hose 83 is connected to the drain discharge port 18a and opened to the outside of the gas appliance 2. However, the outer wall 100 of the container 1a in which the drain discharge port 18a is formed is close to the outer wall of the gas appliance 2. The drain outlet 18a may be directly opened to the outside of the gas appliance 2.
[0024]
For example, as shown in FIG. 4, the partition wall 14b is formed so as to surround one corner of the container 1b to form the water seal chamber 11b, and the overflow wall 15b is formed in the water seal chamber in the neutralization chamber 12b. The arrangement relationship between the chambers 11b, 12b, and 13b may be appropriately changed so as to form the auxiliary chamber 13b so as to surround the corner on the diagonal line with 11b.
[0025]
Furthermore, the water supply communication pipe 81 for supplying tap water faces the neutralization chamber 12 (12a, 12b), but may face the water sealing chamber 11 (11b). In this case, the precipitate (neutralized product) generated during the neutralization treatment of the drain water 64 accumulates in the water sealed chamber 11 and does not flow into the drain pipe 9, so that the drain pipe 9 is clogged due to the precipitate. There is no such thing. However, it is necessary to remove the deposit from the water seal chamber 11 by periodically opening the water drain plug 16 and the lid 10.
Moreover, in the said embodiment, although the gas appliance 2 was mentioned as a combustion apparatus, the petroleum appliance which burns liquid fuels, such as petroleum, may be sufficient, for example.
[Brief description of the drawings]
FIG. 1 is a schematic view of a gas appliance equipped with a drain water storage container according to an embodiment.
FIG. 2 is a plan view showing the internal structure of the drain water storage container shown in FIG.
FIG. 3 is a schematic view of a gas appliance equipped with another drain water storage container according to the embodiment.
FIG. 4 is a plan view showing a container internal structure of still another drain water storage container according to the embodiment.
FIG. 5 is a schematic view of a conventional gas appliance.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Drain water storage container 8 Drain pipe 9 Drain piping 10 Cover body 11 Water seal chamber (1st chamber)
12 Neutralization chamber (second chamber)
13 Auxiliary chamber 14 Partition wall 15 Overflow wall 16 Drain plug 17 Drain outlet 18 Drain outlet 33 Drain receiver 64 Drain water 81 Water supply connection pipe

Claims (3)

A drain water storage container for discharging drain water of a drain receiver provided in a combustion exhaust passage in a combustion apparatus having a latent heat recovery type heat exchanger through a drain pipe and storing the drain water.
A first chamber in which the drain pipe is inserted by a partition wall raised from the bottom surface in the drain water storage container, and a second chamber in which a drain port connected to a drain pipe leading to a sewer is formed at the bottom. Divided into
The first chamber is arranged at a position where the lower end portion of the drain pipe is lower than the partition wall and does not reach the bottom surface,
The second chamber is provided with an auxiliary chamber surrounded by an overflow wall having a height lower than the partition wall in an area where the drain outlet is not formed, and opened to the bottom of the auxiliary chamber outside the instrument. A drain water storage container in which a drain discharge port is formed. A drain water storage container for discharging drain water of a drain receiver provided in a combustion exhaust passage in a combustion apparatus having a latent heat recovery type heat exchanger through a drain pipe and storing the drain water.
A first chamber in which the drain pipe is inserted by a partition wall raised from the bottom surface in the drain water storage container, and a second chamber in which a drain port connected to a drain pipe leading to a sewer is formed at the bottom. Divided into
The first chamber is arranged at a position where the lower end portion of the drain pipe is lower than the partition wall and does not reach the bottom surface,
The drain is characterized in that the second chamber is formed with a drain outlet opening outside the combustion device at a height lower than the partition wall on the outer wall of the drain water storage container surrounding the second chamber. Water storage container. In the drain water storage container according to claim 1 or 2,
A drain water storage container, wherein the first chamber or the second chamber serves as a neutralization chamber in which a water supply pipe for supplying tap water for neutralizing drain water is disposed above.

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