JP2009011948A - Drain foreign matter removing structure and drain neutralizer using the drain foreign matter removing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent flowing of a foreign matter such as a fallen leaf and soil into a drain storing chamber of a drain neutralizer. <P>SOLUTION: A foreign matter removing chamber 9 for removing the foreign matter mixed in the drain is provided at a drain introducing port 31 side of the drain storing chamber 33 for storing and neutralizing the drain. A drain entrance 11 of the foreign matter removing chamber 9 is constituted of a tubular member 10 which is provided by being spread from an upper end to a lower end side of the foreign matter removing chamber 9, the lower end 16 has a space toward a bottom surface of the foreign matter removing chamber 9 and a drain exit 15 of the foreign matter removing chamber 9 is formed above the lower end 16 of the tubular member 10. When the drain flowing into the foreign matter removing chamber 9 contains a lightweight foreign matter 12 with smaller specific gravity than that of the drain such as the fallen leaf, the lightweight foreign matter 12 is made to float on the drain in the tubular member 10. When the drain contains a weighty foreign matter 13 with larger specific gravity than that of the drain, the weighty foreign matter 13 is precipitated and stored at a bottom surface side of the foreign matter removing chamber 9. Thereby flowing of the foreign matter into the drain storing chamber 33 can be prevented. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention uses a drain foreign matter removing structure and a drain foreign matter removing structure that prevent foreign matter from entering the drain storage chamber of the drain neutralizer that neutralizes the drain generated in the latent heat recovery heat exchanger. It relates to a drain neutralizer.

  FIG. 3 schematically shows an example of an outdoor arrangement type water heater provided with a latent heat recovery heat exchanger. In the figure, a burner 1 is arranged in a combustion chamber 20 provided in an appliance case 40 of a water heater 17, and a gas pipe (not shown) for supplying fuel to the burner 1 is connected to the burner 1. Has been.

  A combustion fan 5 for supplying and exhausting combustion of the burner 1 is provided on the lower side of the burner 1, and the water heater 17 sends air sucked from the outside to the burner 1 by the rotation of the combustion fan 5. Burner combustion is performed by air and gas supplied through the gas pipe, and the combustion gas generated by the burner combustion is caused by the rotation of the combustion fan 5 as shown by broken line arrows in the drawing. To the exhaust port 8 side to exhaust.

  Above the burner 1, a main heat exchanger (primary heat exchanger) 4 that recovers sensible heat in the combustion gas of the burner 1, and a flow of the combustion gas downstream from the main heat exchanger 4. Latent heat recovery heat exchangers (secondary heat exchangers) 6 that are provided on the side and recover the sensible heat and latent heat of the combustion gas are arranged at intervals. In addition, each heat exchanger 4 and 6 has a water pipe which receives the heat of the combustion gas of the burner 1, and is provided with the fin in the outer peripheral side as needed.

  A water supply pipe 46 that leads water from the water supply source to the latent heat recovery heat exchanger 6 is connected to the inlet side of the latent heat recovery heat exchanger 6. The inlet side of the heat exchanger 4 is connected via a connecting pipe 48. A hot water supply pipe 47 is connected to the outlet side of the main heat exchanger 4.

  Normally, the water supply pipe 46 has a water thermistor (not shown) that detects the temperature of water supplied from the water supply pipe 46 and flows into the latent heat recovery heat exchanger 6, and the water that flows into the latent heat recovery heat exchanger 6. The hot water supply pipe 47 is provided with a hot water thermistor (not shown) capable of detecting the temperature of the hot water flowing out.

  Under the latent heat recovery heat exchanger 6, there is provided a drain tray 43 for recovering drain (condensate water droplets) generated in the latent heat recovery heat exchanger 6. It is made to discharge outside the instrument case 40 through the drain pipe 44. In addition, since the drain contains nitrogen oxide (NOx), sulfur oxide (SOx), etc. in the combustion gas, it is strongly acidic with a pH of 2 to 4, so it needs to be neutralized, and the water heater shown in FIG. In FIG. 17, a drain neutralizer 3 is interposed in the drain pipe 44.

  For example, as shown in FIG. 4, the drain neutralizer 3 has a drain storage chamber 33 for neutralizing the drain, and the drain storage chamber 33 has a cross-sectional portion (upper right end portion in the drawing). Thus, for example, the neutralizing agent 35 in which calcium carbonate or the like is granulated to have a diameter of about 5 mm is filled through a gap. In FIG. 4, reference numeral 7 denotes a partition wall that separates the inside of the drain storage chamber 33. As shown by the arrow D in the figure, the drain is introduced into the drain storage chamber 33 from the drain inlet 31 and reacts with a neutralizing agent 35 such as calcium carbonate to become neutral calcium nitrate or the like. It is discharged from the discharge unit 32. In addition, it is widely known to use calcium carbonate as a method for treating such acidic wastewater such as drain (see, for example, Patent Document 1).

  In the water heater 17, the combustion control of the burner 1 and the rotation control of the combustion fan 5 are performed according to a sequence program given in advance by a combustion control device (not shown) based on the detection signals of the sensors. As described above, the burner 1 is combusted by the gas supplied from the gas pipe and the air sent by the combustion fan 5. As the burner 1 burns, hot water is produced by passing water from the water supply pipe 46 through the latent heat recovery heat exchanger 6 and the main heat exchanger 4 in order, and is supplied to a hot water supply destination such as a kitchen via the hot water supply pipe 47. The hot water is led.

  In the water heater provided with the latent heat recovery heat exchanger 6, the high-temperature combustion gas from the burner 1 is supplied to the combustion gas and the main heat exchanger 4 while passing through the main heat exchanger 4. Heat exchange is performed with water, and sensible heat of the combustion gas is recovered. Further, while the combustion gas that has passed through the main heat exchanger 4 passes through the latent heat recovery heat exchanger 6, heat exchange is performed between the combustion gas and water supplied to the latent heat recovery heat exchanger 6. Thus, the sensible heat and latent heat of the combustion gas are recovered.

  The latent heat recovery of the combustion gas by the latent heat recovery heat exchanger 6 is performed by bringing the combustion gas containing water vapor into contact with the low temperature heat transfer surface below the saturation temperature to condense the water vapor in the combustion gas. That is, it recovers the latent heat of condensation that occurs when water vapor condenses, and usually recovers the enthalpy of the water vapor of the combustion gas that is discharged out of the combustion system such as a water heater as the combustion gas. is there.

  Thus, in the water heater provided with the latent heat recovery heat exchanger 6, when the combustion gas generated by the combustion of the burner 1 passes through the latent heat recovery heat exchanger 6, the water pipe in the latent heat recovery heat exchanger 6 is connected. The passing water takes away the latent heat possessed by the water vapor in the combustion gas (recovers the latent heat), raises the temperature, and is further heated by the combustion thermal power of the burner 1 when passing through the main heat exchanger 4. Since hot water having a set temperature is produced, the burner 1 can perform efficient heating.

  That is, by providing the heat exchanger 6 for recovering latent heat, for example, in a water heater, the thermal efficiency reaches about 90% or more on a high heating value (total heating value) basis, and the heat exchanger 6 for recovering latent heat is provided. High thermal efficiency is achieved compared to a normal water heater without.

JP 2000-218283 A

  By the way, although there are various houses, trees are often planted in the garden on the south side of the detached house, while the combustion device such as the water heater 17 is often provided on the north side of the house. Therefore, for example, as shown in FIG. 5A, in a residential area where a plurality of detached houses 27 are arranged side by side, the combustion apparatus such as the water heater 17 and the wood 2 often face each other. As shown in FIG. 5B, the fallen leaves of the tree 2 may enter the water heater 17 from the exhaust port 8 of the water heater 17 and enter the drain neutralizer 3. In particular, in the Japanese archipelago, in the Pacific region, there are few rainy days from the late autumn to winter, and dust and fallen leaves often enter the drain neutralizer 3 from the exhaust port 8. It was.

  As a result, the fallen leaves enter the gaps of the neutralizing agent 35 in the drain storage chamber 33, causing a problem that the drain neutralizer 3 is clogged. Then, for example, in the drain neutralizer 3 as shown in FIG. 4, the drain water level exceeds the normal water level indicated by A in the figure and rises to the overflow prevention water level indicated by B in the figure. The water level is detected by the water level detection electrode 36 that detects the water level for preventing drain overflow. And since it is necessary to stop the combustion of the water heater 17 to prevent the drain from overflowing, the user cannot use the water heater 17 and feels very uncomfortable.

  The present invention has been made to solve the above-mentioned problems, and its purpose is to use a drain foreign matter removing structure that can prevent foreign matters such as fallen leaves and soil from entering the drain storage chamber and the drain foreign matter removing structure. It is to provide a drain neutralizer.

  In order to achieve the above object, the present invention has the following configuration as means for solving the problems. That is, the drain foreign matter removing structure according to the first aspect of the present invention is a drain neutralizer equipped with a drain storage chamber for storing drain generated in a latent heat recovery heat exchanger that recovers the exhaust heat of the burner and neutralizing the drain. A foreign matter removal chamber for removing foreign matter mixed in the drain is provided on the drain inlet side of the tube, and a drain inlet of the foreign matter removal chamber extends from the upper end to the lower end side of the foreign matter removal chamber. The lower end of the tubular member constituted by a member is spaced from the bottom surface of the foreign matter removal chamber, and the drain outlet of the foreign matter removal chamber from which the drain exits from the foreign matter removal chamber to the drain storage chamber is from the lower end of the tubular member Is formed on the upper side, and the foreign matter removal chamber floats the lightweight foreign matter on the drain in the tubular member when the drainage flowing into the foreign matter removal chamber contains a lightweight foreign matter having a specific gravity smaller than that of the drain. To prevent the lightweight foreign matter from flowing into the drain storage chamber, and when the drain contains heavy foreign matter having a specific gravity greater than that of the drain, the heavy foreign matter is allowed to settle on the bottom surface side of the foreign matter removal chamber. It is configured to prevent foreign matters contained in the drain from flowing into the drain storage chamber by storing.

  The drain foreign matter removing structure according to the second aspect of the present invention is a drain neutralizer having a drain storage chamber for storing drain generated in a latent heat recovery heat exchanger that recovers exhaust heat of the burner and neutralizing the drain. A foreign matter removal chamber for removing foreign matter mixed in the drain is provided on the drain inlet side of the foreign matter, and the foreign matter removal chamber extends from the upper end to the lower end side of the foreign matter removal chamber to remove the foreign matter. A partition wall is provided for partitioning the chamber into a first chamber on the inlet side of the drain and a second chamber on the outlet side of the drain, and the first chamber and the second chamber are provided at a lower end side of the partition wall. A communicating portion is provided, the drain outlet of the foreign matter removing chamber is formed above the lower end of the partition wall, and the foreign matter removing chamber is connected to the drain flowing into the foreign matter removing chamber. When lighter foreign matter with a smaller specific gravity is included, The floating foreign matter is floated on the drain in the first chamber to prevent the lightweight foreign matter from flowing to the second chamber side, and the heavy foreign matter is included when the drain contains heavy foreign matter having a specific gravity greater than that of the drain. It is configured to prevent foreign matter contained in the drain from flowing into the drain storage chamber by precipitating and accumulating on the bottom surface side of the foreign matter removal chamber.

  Furthermore, the drain neutralizer of the third invention has the drain foreign matter removing structure of the first or second invention, and the foreign matter removing chamber is built in the drain neutralizer. .

  According to the drain foreign matter removal structure of the present invention, a foreign matter removal chamber for removing foreign matter mixed in the drain is provided on the drain inlet side of the drain neutralizer, and the drain flowing into the foreign matter removal chamber is When lightweight foreign matter having a specific gravity smaller than that of the drain is contained, the lightweight foreign matter is floated on the drain in the tubular member at the drain inlet of the foreign matter removal chamber or in the first chamber provided on the inlet side of the foreign matter removal chamber. By preventing light foreign matter from flowing into the drain storage chamber, and when the drain contains heavy foreign matter having a specific gravity greater than that of the drain, the heavy foreign matter is precipitated and accumulated on the bottom surface side of the foreign matter removal chamber. Since the foreign matter contained in the drain is prevented from flowing into the drain storage chamber, the foreign matter can be prevented from flowing into the drain storage chamber with a simple configuration.

  Further, according to the drain neutralizer of the present invention, the drain foreign matter removing structure of the present invention is incorporated, and the foreign matter removing chamber is built in. Thus, it is possible to prevent foreign matter from flowing into the drain storage chamber and to accurately neutralize and discharge the drain.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the present embodiment, the same reference numerals are assigned to the same name portions as those in the examples described so far, and the duplicate description is omitted or simplified.

  FIG. 1 schematically shows the configuration of an embodiment of a drain neutralizer provided with a first embodiment of the drain removing structure according to the present invention. Similar to the drain neutralizer 3 shown in FIG. 4, the drain neutralizer 3 includes a drain storage chamber 33 that stores drain generated in the latent heat recovery heat exchanger 6 and neutralizes the drain. In addition, this embodiment is different from the drain neutralizer 3 shown in FIG. 4 in that the drain neutralizer 3 has a drain inlet side (adjacent to the drain inlet 31 of the drain storage chamber 33). ), A characteristic foreign matter removing chamber 9 for removing foreign matter mixed in the drain is provided.

  In this embodiment, the drain inlet 11 of the foreign material removal chamber 9 is constituted by a tubular member 10 extending from the upper end to the lower end side of the foreign material removal chamber 9, and the lower end 16 of the tubular member 10 is a foreign material. It is located at a distance from the bottom surface of the removal chamber 9. Further, the drain outlet 15 of the foreign substance removal chamber 9 where the drain from the foreign substance removal chamber 9 to the drain storage chamber 33 is formed above the lower end 16 of the tubular member 10.

  Then, the foreign matter removal chamber 9 is configured such that when the drain that flows into the foreign matter removal chamber 9 includes a lightweight foreign matter 12 such as a fallen leaf having a specific gravity smaller than that of the drain, the lightweight foreign matter 12 is shown in FIG. As shown in the figure, by floating on the drain in the tubular member 10, the lightweight foreign material 12 is prevented from flowing into the drain storage chamber 33, and the heavy foreign material 13 such as soil having a specific gravity larger than that of the drain. If it is included, the heavy foreign matter 13 is deposited on the bottom side of the foreign matter removal chamber 9 and accumulated to prevent the foreign matters 12 and 13 contained in the drain from flowing into the drain storage chamber 33. It is characterized by that.

  The present embodiment is configured as described above, and the drain flows into the drain storage chamber 33 after passing through the foreign substance removal chamber 9 as indicated by an arrow D in FIG. When the drainage flowing into the foreign matter removal chamber 9 includes a lightweight foreign matter 12 having a specific gravity smaller than that of the drain, the lightweight foreign matter 12 is floated on the drain in the tubular member 10 at the drain inlet of the foreign matter removal chamber 9. Therefore, even if fallen leaves or the like enter the hot water heater 17 from the exhaust port 8 of the hot water heater 17, the lightweight foreign matter 12 is prevented from flowing into the drain storage chamber 33. Inflow can be prevented.

  Further, according to the present embodiment, when the drain contains heavy foreign matter 13 having a specific gravity greater than that of the drain, the heavy foreign matter 13 is deposited on the bottom surface side of the foreign matter removal chamber 9 and accumulated. Since the heavy foreign matter 13 contained in the drain can be prevented from flowing into the drain storage chamber 33, the foreign matter can be prevented from flowing into the drain storage chamber 33 with a simple configuration.

  When the lightweight foreign matter 12 is a fallen leaf, it is lighter than the drain immediately after entering the foreign matter removal chamber 9 and stays floating on the drain in the tubular member 10, but the fallen leaf decays with time and its specific gravity is heavy. Thus, the heavy foreign matter 13 is deposited on the bottom surface side of the foreign matter removing chamber 9 and collected.

  Next, a second embodiment of the drain foreign matter removing structure according to the present invention will be described. As shown in FIG. 2A, the drain removal structure of the second embodiment is separated from the drain neutralizer 3, on the drain introduction side of the drain neutralizer 3 (the drain pipe 44 of the water heater 17). Between the first and second drain neutralizers 3). In FIG. 2A, the water heater 17 is schematically shown with the appliance case 40 and the like omitted.

  As shown in FIG. 2B, a partition wall 14 is extended in the foreign substance removal chamber 9 from the upper end to the lower end side of the foreign substance removal chamber. The partition wall 14 is configured to partition the foreign substance removal chamber 9 into a first chamber 21 on the drain inlet 11 side and a second chamber 21 on the drain outlet 15 side, but the lower end side of the partition wall 14 Is provided with a communication portion 18 for communicating the first chamber 21 and the second chamber 22. The drain outlet 15 of the foreign substance removal chamber 9 is formed above the lower end 16 of the partition wall 14.

  When the drainage flowing into the foreign matter removal chamber 9 includes a lightweight foreign matter 12 such as a fallen leaf having a specific gravity smaller than that of the drain, the foreign matter removal chamber 9 converts the lightweight foreign matter 12 into a drain in the first chamber 21. The lightweight foreign matter 12 is prevented from flowing to the second chamber 22 side by floating, and when the heavy foreign matter 13 such as soil having a specific gravity larger than that of the drain is included in the drain, the heavy foreign matter 13 is removed. By depositing and collecting on the bottom surface side of the chamber 9, foreign matter contained in the drain is prevented from flowing into the drain storage chamber 33 of the drain neutralizer 3.

  In the second embodiment, the drain flows as shown by the arrow D in FIG. 2B, as in the first embodiment. At this time, even if foreign matter is mixed in the drain, the light weight such as fallen leaves etc. The foreign matter 12 is prevented from floating in the drain in the first chamber 21 and flowing to the second chamber 22 side, and the heavy foreign matter 13 flows into the drain storage chamber 33 by being settled and accumulated on the bottom side of the foreign matter removal chamber 9. Therefore, the same effect as in the first embodiment can be obtained.

  In addition, this invention is not limited to the said embodiment, It can take various aspects. For example, in the first embodiment, the foreign matter removal chamber 9 is built in the drain neutralizer 3, and in the second embodiment, the foreign matter removal chamber 9 is provided separately from the drain neutralizer 3. The removal chamber 9 may be built in the drain neutralizer 3 or may be provided separately from the drain neutralizer 3 according to the form of the combustion apparatus such as the hot water heater 17.

  Moreover, although the said description demonstrated the hot water heater 17 as a combustion apparatus which provides the drain neutralizer 3, a combustion apparatus is not restricted to a hot water heater, and is equipped with the function of both a hot water bath and a hot water heater and a hot water bath. The drain neutralizer 3 is provided in an appropriate combustion device such as a combined water heater, and the foreign substance removal chamber 9 is provided on the drain introduction port side to constitute the drain foreign substance removal structure of the present invention.

It is explanatory drawing which shows typically the drain neutralizer provided with 1st Embodiment of the drain foreign material removal structure which concerns on this invention. It is explanatory drawing which shows typically the 2nd Embodiment of the drain foreign material removal structure which concerns on this invention. It is explanatory drawing which shows typically the example of a structure of the water heater provided with the heat exchanger for latent heat collection | recovery. It is explanatory drawing which shows the example of the conventional drain neutralizer. It is explanatory drawing for demonstrating the relationship between the arrangement position of the water heater arrange | positioned in the house of a residential area, and the arrangement position of the trees of a house.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Burner 3 Drain neutralizer 4 Main heat exchanger 5 Combustion fan 6 Heat exchanger for latent heat recovery 8 Exhaust port 9 Foreign material removal chamber 10 Tubular member 11 Drain inlet 12 Light foreign material 13 Heavy foreign material 14 Partition wall 15 Drain outlet 16 Lower end 17 Water heater 18 Communication portion 21 First chamber 22 Second chamber 31 Drain inlet 33 Drain storage chamber

Claims (3)

  The drain generated in the heat exchanger for recovering latent heat of the burner is stored in the drain neutralizer having a drain storage chamber for neutralizing the drain, and mixed into the drain. A foreign matter removal chamber is provided for removing foreign matter, and a drain inlet of the foreign matter removal chamber is constituted by a tubular member extending from the upper end to the lower end side of the foreign matter removal chamber, and the lower end of the tubular member is the foreign matter. The drain outlet of the foreign matter removal chamber that is spaced from the bottom surface of the removal chamber and from which the drain exits from the foreign matter removal chamber to the drain storage chamber is formed above the lower end of the tubular member, and the foreign matter removal chamber is When the drainage flowing into the foreign matter removal chamber contains lightweight foreign matter having a specific gravity smaller than that of the drain, the lightweight foreign matter flows into the drain storage chamber by floating the lightweight foreign matter on the drain in the tubular member. In addition, when the drain contains heavy foreign matter having a specific gravity greater than that of the drain, the foreign matter contained in the drain is collected by precipitating and collecting the heavy foreign matter on the bottom surface side of the foreign matter removal chamber. The drain foreign matter removing structure is configured to prevent inflow into the drain storage chamber.   The drain generated in the heat exchanger for recovering latent heat of the burner is stored in the drain neutralizer having a drain storage chamber for neutralizing the drain, and mixed into the drain. A foreign matter removal chamber is provided for removing foreign matter, and the foreign matter removal chamber is extended from the upper end to the lower end side of the foreign matter removal chamber, and the foreign matter removal chamber is connected to the first chamber on the drain inlet side and the first chamber. A partition wall for partitioning into a second chamber on the outlet side of the drain is provided, and a communication portion for connecting the first chamber and the second chamber is provided on the lower end side of the partition wall, and the foreign matter removal The outlet of the drain of the chamber is formed above the lower end of the partition wall, and the foreign matter removal chamber is formed when the drainage flowing into the foreign matter removal chamber contains a lightweight foreign matter having a specific gravity smaller than that of the drain. Lightweight foreign matter floats on the drain in the first chamber To prevent the lightweight foreign matter from flowing to the second chamber side, and when the drain contains heavy foreign matter having a specific gravity greater than that of the drain, the heavy foreign matter is allowed to settle on the bottom side of the foreign matter removal chamber. A drain foreign matter removing structure characterized in that the foreign matter contained in the drain is prevented from flowing into the drain storage chamber by being stored.   A drain neutralizer having the drain foreign matter removing structure according to claim 1 or 2, wherein a foreign matter removing chamber is built in the drain neutralizer.

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