JP2008032355A - Drain neutralizer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drain neutralizer for neutralizing drain produced in a latent heat recovery heat exchanger and introducing it into a bath drain port while preventing the backflow of the drain even when the bath drain port is flooded. <P>SOLUTION: The drain introduced from a drain introduction port 12 is reserved in a drain reservoir 14 and neutralized, and then it is introduced from a drain discharge port 13 to the bath drain port 15. A partition wall 11 partitions the drain reservoir 14 into a water sealing chamber 9 on the side of the drain introduction port 12 and a drain chamber 10 on the side of the drain discharge port 13. On the lower end side of the partition wall 11, the water sealing chamber 9 is communicated with the drain chamber 10. The water sealing chamber 9 uses the drain for water-sealing exhaust gas which flows from the drain introduction port 2 to the side of the drain reservoir 14 together with the drain to prevent the flow to the side of the drain discharge port 13. In a region ranging from the drain chamber 10 to the drain discharge port 13, an air vent port 17 is provided for preventing the backflow of the drain from the drain reservoir 14 to the side of the drain introduction port 12 when the drain discharge port 13 is water-sealed when the bath drain port 15 is flooded. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a drain neutralizer that neutralizes drain generated in a latent heat recovery heat exchanger.

  FIG. 2 schematically shows an example of a water heater that is a combustion apparatus. Conventionally, various combustion apparatuses as shown in this figure have been proposed (see, for example, Patent Document 1).

  In the figure, a burner 1 is disposed in a combustion chamber 20 provided in an instrument case 40, and a gas pipe 42 for supplying fuel to the burner 1 is connected to the burner 1. An open / close valve (not shown) for controlling supply / stop of fuel to the burner 1 and a proportional valve (not shown) capable of controlling the amount of fuel supplied to the burner 1 with the valve opening degree are interposed. It is installed.

  A combustion fan 5 that supplies and exhausts combustion of the burner 1 is provided below the burner 1. This water heater supplies air that is sucked from the outside to the burner 1 by the rotation of the combustion fan 5, performs burner combustion with this air and gas supplied through the gas pipe 42, and is generated by the burner combustion. The combustion gas is sent from the combustion chamber 20 to the exhaust port 8 side and exhausted by the rotation of the combustion fan 5.

  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. Each of the heat exchangers 4 and 6 has, for example, metal heat receiving pipes 34 and 36 for passing water as a heat receiving fluid that receives the heat of the combustion gas of the burner 1, and outside the heat receiving pipes 34 and 36. The heat pipes 34 and 36 and a plurality of fins 35 and 37 provided substantially perpendicularly are provided, and the fins 35 and 37 are provided at intervals.

  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. In FIG. 2, the water supply pipe 46, the hot water supply pipe 47, and the connection pipe 48 are schematically shown by linear arrows, respectively, but the water supply pipe 46, the hot water supply pipe 47, and the connection pipe 48 circulate water. For example, a pipe having a circular cross section.

  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.

  Below the latent heat recovery heat exchanger 6, there is provided a drain tray 43 as a drain recovery means for recovering drain (condensate water droplets) generated in the latent heat recovery heat exchanger 6. The accumulated drain is discharged to the outside of the instrument case 40 through the drain pipe 44. Since the drain contains nitrogen oxide (NOx), sulfur oxide (SOx), etc. in the combustion gas, it is strongly acidic with a pH of 2-4. It is necessary to mix and neutralize. Drain becomes neutral calcium nitrate by reacting with calcium carbonate.

  Combustion control of the burner 1 and 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 detection signals of the respective sensors. The burner 1 is combusted by the gas supplied from the gas pipe 42 and the air sent by the combustion fan 5. As the burner 1 burns, the hot water heater passes through the water supply pipe 46 through the latent heat recovery heat exchanger 6 and the main heat exchanger 4 in order to make hot water. It has a hot water supply function that leads the hot water first.

  In the water heater provided with the latent heat recovery heat exchanger 6, the high-temperature combustion gas from the burner 1 is disposed from the upper side of the burner 1 to the main heat exchanger 4, for example, as indicated by the broken line arrow in FIG. 2. It passes through the installation area, passes through the lower side of the receiving tray 43, and enters the arrangement area side of the latent heat recovery heat exchanger 6 from the horizontal direction side. And the combustion gas which passed the arrangement | positioning area | region of the heat exchanger 6 for latent heat collection | recovery is exhausted from the exhaust port 8 side.

  Then, while the combustion gas passes through the main heat exchanger 4, heat exchange is performed between the combustion gas and water supplied to the main heat exchanger 4, 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 held by the water vapor in the combustion gas (collects the latent heat) to increase 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 2000-301167 A

  By the way, as described above, if drain is allowed to flow out from the drain drain pipe 44 to the lower side of the instrument case 40, liquid drainage will be discharged to the outside of the instrument case 40. When a bath water heater is arranged on a veranda or the like as in a house or office building, the user feels very uncomfortable.

  Therefore, as shown in FIG. 3, the drain neutralizer 3 is disposed in the bathroom 20, and the drain that flows out from the combustion device 25 is discharged through the drain neutralizer 3 to the bathroom 20 (bathroom drain 15). It is thought that it leads to. In this case, the drain neutralizer 3 disposed indoors needs to be configured so that the exhaust gas flowing from the combustion device 25 side to the drain neutralizer 3 side together with the drain does not flow into the bathroom 20.

  Therefore, it is conceivable to form the drain neutralizer 3 as shown in FIG. The drain neutralizer 3 includes a drain introduction port 12 for introducing drain, a drain storage chamber 14 for storing and neutralizing the drain introduced from the drain introduction port 12, and a drain passing through the drain storage chamber 14. And a drain discharge port 13 for guiding the water to the bathroom drain port.

  A partition wall 11 is provided in the drain storage chamber 14. The partition wall 11 extends from the upper end to the lower end side of the drain storage chamber 14, and the drain storage chamber 14 is connected to the water seal chamber 9 on the drain introduction port 12 side and the drainage chamber 10 on the drain discharge port side 13. On the lower end side of the partition wall 11, a communication portion 16 that connects the water seal chamber 9 and the drainage chamber 10 is provided.

  This drain neutralizer 3 seals the exhaust gas flowing from the drain introduction port 12 to the drain storage chamber 14 side together with the drain with the drain, and flows to the drain discharge port 13 side. By forming a water-sealed chamber for preventing exhaust, it is possible to suppress the exhaust from flowing into the bathroom 20 through the drain discharge port 13.

  However, as shown in FIG. 3, the bathroom drain port 15 also serves as a hot water drain port of the bathtub 26, and when the hot water in the bathtub 26 is drained, as shown in FIG. 4B, the bathroom drain port 15. Will be temporarily submerged. Then, the drain discharge port 13 of the drain neutralizer 3 is sealed with water, and the region from the drainage chamber 10 to the drain discharge port 13 side is in a hermetically sealed state, so that the drain is not discharged from the drain discharge port 13, depending on circumstances. Causes a problem of backflow from the drain storage chamber 14 to the drain inlet 12 side.

  The present invention has been made to solve the above-described conventional problems, and its purpose is to neutralize the drain generated in the heat exchanger for recovering latent heat of the combustion apparatus and guide it to the bathroom drain outlet. An object of the present invention is to provide a drain neutralizer capable of preventing the drain from flowing back to the combustion device side even when the bathroom drain is flooded.

  In order to achieve the above object, the present invention has the following configuration as means for solving the problems. That is, the present invention is a drain neutralizer that neutralizes the drain generated in the latent heat recovery heat exchanger that recovers the exhaust heat of the burner and guides it to the bathroom drain outlet, and the drain inlet for introducing the drain; , A drain storage chamber for storing and neutralizing drain introduced from the drain introduction port, and a drain discharge port for guiding the drain passing through the drain storage chamber to a bathroom drain port, A partition wall extending from the upper end to the lower end side of the drain storage chamber is provided to partition the drain storage chamber into a water seal chamber on the drain introduction port side and a drain chamber on the drain discharge port side, and the partition On the lower end side of the wall, a communication portion is provided for communicating the water sealing chamber and the drainage chamber. The water sealing chamber is configured to drain the exhaust flowing from the drain introduction port to the drain storage chamber side together with the drain. Water drain and the drain outlet side An exhaust water-sealed chamber that prevents flow, and an area extending from the drainage chamber to the drain outlet, when the drain outlet is sealed when the bathroom drainage is flooded, the drain is stored in the drain storage chamber. In order to solve the problem, a configuration is provided with an air vent hole for preventing the air from flowing backward to the drain inlet side.

  The present invention divides a drain storage chamber for storing drain introduced from a drain introduction port into a water sealing chamber on the drain introduction port side and a drain chamber on the drain discharge port side by a partition wall, The water sealing chamber and the drainage chamber are communicated with each other by the communication portion, and the drainage can be discharged from the drain discharge port side through the drainage chamber side while the exhaust gas is sealed with the drain by the water sealing chamber.

  In this drain discharge, according to the present invention, drain is introduced from the drain storage chamber when the drain discharge port is sealed in the area from the drainage chamber to the drain discharge port when the bathroom drainage port is submerged. Since the air vent hole is provided to prevent backflow to the mouth side, the drain can be discharged from the drain outlet even if the bathroom drain outlet is submerged with the bath water drainage etc. Can prevent backflow.

  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.

  1A and 1B show a configuration of an embodiment of a drain neutralizer according to the present invention in a state where the drain neutralizer is arranged in a bathroom 20. The drain neutralizer of the present embodiment is configured in substantially the same manner as the drain neutralizer 3 shown in FIG. 4, and the feature of the present embodiment is in the region from the drain chamber 10 to the drain outlet 13. The air vent hole 17 is provided to prevent the drain from flowing backward from the drain storage chamber 14 to the drain inlet 12 when the drain outlet 13 is sealed when the bathroom drain 15 is flooded.

  For example, the communication part 16 is formed with the partition wall 11 such that its lower end is spaced from the bottom wall of the drain storage chamber 14, and this gap may be used as the communication part 16, or on the lower end side of the partition wall 11. A through hole may be formed, and the through hole may be used as the communication portion 16. Further, a neutralizing agent such as calcium carbonate (not shown) is disposed in the drain storage chamber 14, and the drain is neutralized by this neutralizing agent.

  This embodiment is configured as described above. As shown in FIG. 1B, even when the drain outlet 13 of the drain neutralizer 3 is sealed when the bathroom drain 15 is submerged, Since the air in the drain storage chamber 14 can be released to the outside through the air vent hole 17, the drain chamber 10 is not airtight like the drain neutralizer shown in FIG. It can be discharged from the outlet 13, and the drain can be prevented from flowing back from the drain storage chamber 14 to the drain inlet 12 side.

  That is, according to the present invention, there is no fear of the backflow of the drain toward the drain introduction port 12 side, and the drain generated in the latent heat recovery heat exchanger 6 of the combustion device 25 is appropriately neutralized and led to the bathroom drain port 15. it can.

  The present invention is not limited to the above embodiments, and can take various forms. For example, in the above embodiment, the air vent hole 17 is formed on the upper side of the drainage chamber 10, but it may be formed on the side of the drainage chamber 10 at the position indicated by the broken line A in FIG. The formation location of the air vent hole 17 is appropriately set.

  Moreover, although the said description demonstrated the water heater as the combustion apparatus 25 which connects the drain neutralizer 3, the combustion apparatus which connects the drain neutralizer 3 is not necessarily a water heater, a bath pot, a water heater The drain neutralizer 3 can be connected to an appropriate combustion device such as a combined water heater having both functions of a hot water tank and a bath.

  Furthermore, the drain neutralizer of the present invention can be incorporated in the combustion apparatus.

It is explanatory drawing which shows typically one Embodiment of the drain neutralizer which concerns on this invention. It is explanatory drawing which shows typically an example of the combustion apparatus provided with the heat exchanger for latent heat collection | recovery. It is a schematic diagram for demonstrating the structure which connects a drain neutralizer to a combustion apparatus and arrange | positions in a bathroom. It is a schematic diagram for demonstrating the structural example of the drain neutralizer of bathroom arrangement | positioning, and its problem.

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 9 Water seal chamber 10 Drainage chamber 11 Partition wall 12 Drain introduction port 13 Drain discharge port 14 Drain storage chamber 15 Bathroom drainage port 16 Communication part 17 Air vent hole

Claims (1)

  A drain neutralizer that neutralizes drain generated in a heat exchanger for recovering latent heat of a burner and guides it to a bathroom drain outlet, the drain inlet for introducing the drain, and from the drain inlet It has a drain storage chamber for storing and neutralizing drain to be introduced, and a drain discharge port for leading the drain that has passed through the drain storage chamber to a bathroom drain port, and the drain storage chamber has an upper end of the drain storage chamber A partition wall extending from the drain side toward the lower end side to partition the drain storage chamber into a water seal chamber on the drain inlet side and a drain chamber on the drain outlet side, and on the lower end side of the partition wall A communication part is provided for communicating the water sealing chamber and the drainage chamber, and the water sealing chamber seals the exhaust gas flowing from the drain introduction port to the drain storage chamber side together with the drain with the drain. Drain to prevent flow to the outlet side The drain from the drain storage chamber to the drain inlet side when the drain outlet is sealed when the bathroom drainage is submerged in the area from the drain chamber to the drain outlet. A drain neutralizer characterized in that it is provided with an air vent hole to prevent backflow.

Images