JP6234772B2 - Drain neutralizer and combustion apparatus equipped with the drain neutralizer - Google Patents

Description

  The present invention relates to a drain neutralizer for neutralizing drain generated in a latent heat recovery heat exchanger and a combustion apparatus equipped with the drain neutralizer.

  FIG. 9 shows a conventional example of a bath apparatus installed in a bathroom. In this conventional bath apparatus, a bathtub 26 and a balance bath 45 are provided side by side in a bath installation space 52, and a supply / exhaust tube 50 of the balance bath 45 is installed in a wall hole 16 of the bathroom wall 10. However, when the balance bath 45 and the bathtub 26 are arranged in parallel in the relatively small bath installation space 52 as described above, the bathtub 26 must be made small in size, so that the bathtub 26 is bathed in a tight posture. I had to do it and I couldn't enjoy bathing in a relaxed mood.

  Therefore, when replacing the balance bath 45, the user purchases, for example, a water heater having an automatic hot water filling function as a combustion device instead of the balance bath 45, and as shown in FIG. The chamber 17 is fitted and installed in the wall hole 16 where the air supply / exhaust tube 50 has been installed so far, and the bathtub 26 that is as large as the space of the balance bath 45 is installed in the bath installation space 52 to improve the living environment. It has been done. In addition, the code | symbol 18 in FIG. 8 shows the mixing faucet attached to the apron of the bathtub 26. FIG.

  Various configurations of such hot water heaters have been proposed and put into practical use, and an example thereof is schematically shown in FIG. In the drawing, a burner 1 is disposed in a combustion chamber 20 provided in a case (instrument case) 40, and a combustion fan 5 for supplying and exhausting combustion of the burner 1 is provided in the instrument case 40. . As indicated by an arrow in the case 40 in FIG. 7, the water heater 17 sends air (combustion air) sucked from the outside by the rotation of the combustion fan 5 to the burner 1 through the blower chamber 25, and this air And the gas supplied to the burner 1 through a gas pipe (not shown), and the combustion gas generated by the combustion of the burner 1 is converted into a combustion chamber by the rotation of the combustion fan 5. 20 is sent to the exhaust port 8 side and exhausted. As shown in the figure, the water heater 17 is fitted and installed in the wall hole 16 from the outside of the bathroom 30, for example, and is fixed using a fixing member such as a screw provided in the fixing portion B.

  A main heat exchanger (primary heat exchanger) 4 for recovering sensible heat in the combustion gas of the burner 1 is provided on the upper side of the burner 1, and the flow of the combustion gas from the main heat exchanger 4. On the downstream side, a latent heat recovery heat exchanger (secondary heat exchanger) 6 that recovers sensible heat and latent heat of the combustion gas is juxtaposed side by side with the main heat exchanger 4 with a gap therebetween. Yes.

  For simplification of the drawing, although not shown in the drawing, a water supply pipe for leading water from the water supply source to the latent heat recovery heat exchanger 6 is provided on the inlet side of the latent heat recovery heat exchanger 6. Are connected, and the outlet side of the latent heat recovery heat exchanger 6 and the inlet side of the main heat exchanger 4 are connected via a connecting pipe. A hot water supply pipe is connected to the outlet side of the main heat exchanger 4. Normally, the water supply pipe includes a water thermistor that detects the temperature of water supplied from the water supply pipe and flows into the latent heat recovery heat exchanger 6, and a water amount sensor that detects the flow rate of water flowing into the latent heat recovery heat exchanger 6. The hot water supply pipe is provided with a hot water thermistor that can detect the temperature of the hot water flowing out.

  When a hot water filling pipe is connected to the hot water supply pipe so that the hot water filling can be performed on the bathtub 26, a hot water heater 17 capable of automatic hot water filling to the bathtub 26 can be formed. If a bathtub hot water replenishment function is provided, a composite water heater capable of retreating a bathtub can be formed. In addition, although various things have been proposed as the automatic hot water filling configuration and the bath water reheating configuration, they are well known and will not be described in detail here.

  In the water heater 17, the combustion control of the burner 1 is performed according to a sequence program determined in advance by a combustion control means (not shown), and the high-temperature combustion gas generated by the combustion of the burner 1 is the upper side of the burner 1. In this example, the main heat exchanger 4 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 17 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. The water passing through the steam takes away the latent heat possessed by the water vapor in the combustion gas (recovers the latent heat) to increase the temperature, and further heats with 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 latent heat recovery heat exchanger 6, for example, in the water heater 17, the thermal efficiency reaches about 90% or more, for example, 95% on a high heating value (total heating value) basis. Higher thermal efficiency is achieved as compared to a normal water heater without the exchanger 6.

  In the combustion apparatus such as the hot water heater 17 equipped with the latent heat recovery heat exchanger 6, acidic drain (drain condensate) generated in the latent heat recovery heat exchanger 6 is recovered, neutralized, and discharged. It is necessary to provide a drain recovery means (drain drain tray in this figure) 43 for recovering drain under the latent heat recovery heat exchanger 6 and collect the drain. The structure neutralized by the drain neutralizer connected outside is proposed (for example, refer to patent documents 1).

  FIG. 6 shows an example of a drain neutralizer. The drain neutralizer 2 includes a drain introduction unit 3 for introducing drain generated in the heat exchanger 6 for recovering latent heat of the combustion apparatus, and a drain introduction. It has a drain storage chamber 37 for storing drain introduced from the section 3 and a drain outlet 9 for extracting the neutralized drain stored in the drain storage chamber 37 to the outside. The drain storage chamber 37 is filled with a solid neutralizing agent 34 across the entire area with a gap (only a part is shown in the figure), and the drain storage chamber 37 is provided with a partition wall 38 at the center thereof. As a result, the drain is stored as shown in part D of the figure, whereby the upstream side (left side of the figure) of the partition wall 38 forms an exhaust water seal chamber.

JP 2008-275296 A

  However, since the drain is generated in the region where the latent heat recovery heat exchanger 6 is provided (exhaust top side near the exhaust port 8), in order to introduce the drain into the drain neutralizer at the shortest distance by natural fall. The drain neutralizer is desirably disposed on the lower side of the latent heat recovery heat exchanger 6 (for example, the position indicated by C in FIG. 7). For example, the vertically long drain neutralizer illustrated in FIG. It has been desired to develop a light drain neutralizer that can be housed in the instrument case 40 instead of being provided outside the housing.

  The present invention has been made in order to solve the above-mentioned problems, and its purpose is to provide a drain neutralizer that can be provided at the lower end of the combustion apparatus and can appropriately neutralize the drain, and its An object of the present invention is to provide a combustion apparatus using 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 neutralizer according to the first aspect of the invention introduces a drain introduction part for introducing drain generated by the latent heat recovery heat exchanger for recovering the exhaust heat of the burner, and the drain introduced from the drain introduction part passes therethrough. A drain passage chamber; and a drain outlet portion for leading the drain that has passed through the drain passage chamber to the outside. The drain passage chamber is provided in communication with the drain inlet portion, and the latent heat recovery heat exchanger An exhaust water sealing chamber that seals exhaust gas flowing together with the drain from the side by drain, and a drain neutralization chamber that is provided in communication with the water sealing chamber and neutralizes the drain flowing from the water sealing chamber The drain neutralization chamber is filled with a plurality of solid neutralizing agents with gaps through which the drain flows, and the water sealing chamber and the drain neutralization chamber are horizontally arranged through a partition wall. Arranged next to each other, and The drain neutralization chamber is divided into a plurality of stages above and below, and the drain overflowed through the water sealing chamber is introduced into the uppermost stage of the drain neutralization chamber. A passage wall standing from the bottom surface side is provided on the bottom surface side, and a drain passage passage is formed through which the drain passes through a bottom surface region of each step portion of the drain neutralization chamber along the extending direction of the passage wall. The bottom surface of the drain passage passage is inclined so that the downstream side is lower than the upstream side where the drain flows through the drain passage passage, and the drain introduced into the drain passage chamber is the water seal. After passing through the chamber, it passes through the drain passage of the uppermost step portion of the drain neutralization chamber and passes through the bottom surface side of the uppermost step portion, and then passes the bottom surface side of the step portion one step lower than the uppermost step portion. Each step is like passing A drain neutralizer which forms a structure that is led to the outside from the drain outlet portion is neutralized by the neutralizing agent as it passes through the side, the drain neutralizer, an upper end opening from the bottom surface A plurality of upper end openings having different bottom heights, and a case having the highest height from the bottom surface to the upper end opening among these cases is disposed on the outermost side as the case member. One or more in order of decreasing the height sequentially inside the upper part of the case member having the highest height, such that the second highest case is inserted and arranged inside the upper part of the member. By sequentially inserting and arranging the inner case, the space between the bottom wall of the outer case and the inner case, and the space in the innermost case, which are inserted into each other, constitute the drain passage chamber, and the inner side of the case member. Arranged A case member that forms the drain neutralization chamber in a plurality of stages with the bottom wall of the inner case placed as a means for partitioning and arranging the neutralization chamber in the vertical direction, and serves as the outermost case The bottom surface of each inner case arranged on the inner side is formed with an opening for allowing the drain that has passed through the drain passage of the drain neutralization chamber formed on the bottom surface to flow into the lower drain neutralization chamber As a means to solve the problem.

The drain neutralizer according to the second aspect of the invention introduces a drain introduction part for introducing drain generated by a latent heat recovery heat exchanger for recovering the exhaust heat of the burner, and the drain introduced from the drain introduction part passes therethrough. A drain passage chamber; and a drain outlet portion for leading the drain that has passed through the drain passage chamber to the outside. The drain passage chamber is provided in communication with the drain inlet portion, and the latent heat recovery heat exchanger An exhaust water sealing chamber that seals exhaust gas flowing together with the drain from the side by drain, and a drain neutralization chamber that is provided in communication with the water sealing chamber and neutralizes the drain flowing from the water sealing chamber The drain neutralization chamber is filled with a plurality of solid neutralizing agents with gaps through which the drain flows, and the water sealing chamber and the drain neutralization chamber are horizontally arranged through a partition wall. Are arranged next to each other, and the drain The neutralization chamber is divided into a plurality of stages above and below, and the drain overflowed through the water seal chamber is introduced into the uppermost stage of the drain neutralization chamber, and the bottom surface of each step of the drain neutralization chamber On the side, a passage wall standing from the bottom surface side is provided, and a drain passage passage is formed in which the drain passes through a bottom surface side region of each step portion of the drain neutralization chamber along the extending direction of the passage wall, The bottom surface of the drain passage passage is inclined so that the downstream side is lower than the upstream side where the drain flows through the drain passage passage, and the drain introduced into the drain passage chamber is the water sealing chamber. Passes through the drain passage of the uppermost step of the drain neutralization chamber and passes through the bottom side of the uppermost step, and then passes through the bottom side of the step one step lower than the uppermost step. The bottom of each step The drain passage is neutralized by the neutralizing agent when passing through the drain and is led out to the outside from the drain lead-out portion. The downstream side is formed so as to be wide continuously or stepwise. Further, in the drain neutralizer of the third invention, in addition to the configuration of the first or second invention, the drain passage is formed in such a manner that the drain meanders and passes through the bottom surface side of each step portion. It is characterized by being.

Further, in the drain neutralizer of the fourth invention, in addition to the configuration of the first invention, the drain passage passage is continuous on the downstream side of the upstream side where the drain flows for each step portion. It is characterized by being formed so as to become wider stepwise.

Furthermore, a combustion apparatus according to a fifth aspect of the present invention includes a burner, a latent heat recovery heat exchanger that recovers exhaust heat of the burner, and a first to a first heat exchanger that recover exhaust latent heat of the burner in a case installed in a wall hole formed in a bathroom wall . 4. The drain neutralizer according to any one of the inventions 4 is provided. Furthermore, a combustion apparatus according to a sixth aspect of the present invention includes a burner, a latent heat recovery heat exchanger that recovers exhaust heat from the burner, and a drain neutralizer in a case installed in a wall hole formed in a bathroom wall. The drain neutralizer is connected to the drain introducing portion for introducing drain generated by the latent heat recovery heat exchanger for recovering the exhaust heat of the burner, and the drain introduced from the drain introducing portion passes through the drain neutralizer. A drain passage chamber, and a drain outlet portion for leading the drain that has passed through the drain passage chamber to the outside. The drain passage chamber is provided in communication with the drain inlet portion, and the heat exchange for latent heat recovery. An exhaust water sealing chamber for sealing the exhaust gas flowing together with the drain from the vessel side with the drain, and a drain provided in communication with the water sealing chamber for neutralizing the drain flowing from the water sealing chamber A drain neutralization chamber Are filled with a plurality of solid neutralizing agents with gaps through which the drain flows, and the water sealing chamber and the drain neutralizing chamber are arranged horizontally next to each other via a partition wall, and the drain neutralizing chamber Is divided into a plurality of stages in the vertical direction, and the drain overflowed through the water sealing chamber is introduced into the uppermost step portion of the drain neutralization chamber, on the bottom side of each step portion of the drain neutralization chamber Is provided with a passage wall standing up from the bottom surface side, and a drain passage passage is formed through which the drain passes through a bottom side region of each step portion of the drain neutralization chamber along the extending direction of the passage wall. The bottom surface of the passage passage is inclined so that the downstream side is lower than the upstream side through which the drain flows through the drain passage passage, and the drain introduced into the drain passage chamber passes through the water seal chamber. After that Each stage passes through the drain passage of the uppermost step of the neutralization chamber, passes through the bottom side of the uppermost step, and then passes through the bottom side of the step one step lower than the uppermost step. When passing through the bottom surface side of the part, it is neutralized by the neutralizing agent and led out from the drain lead-out part. Furthermore, the combustion apparatus of the seventh invention is characterized in that, in addition to the configuration of the sixth invention, the drain passage is formed in such a manner that the drain meanders on the bottom surface side of each step portion.

  According to the drain neutralizer of the present invention, the drain generated by the latent heat recovery heat exchanger that recovers the exhaust heat of the burner is introduced from the drain introduction part into the drain passage chamber and passed through the drain lead-out part. However, since the drain passage chamber has an exhaust water sealing chamber provided in communication with the drain introduction portion, the exhaust flowing together with the drain from the latent heat recovery heat exchanger side is sealed with the drain. It is possible to prevent the exhaust gas from being led to the outside through the drain neutralizer.

  In the drain neutralizer of the present invention, the drain passage chamber has a drain neutralization chamber communicating with the water seal chamber, and a plurality of solid neutralizing agents that neutralize the drain flow in the drain neutralization chamber. Although the drain neutralization chamber is filled through the gap, the drain neutralization chamber is not configured to store and neutralize the drain as in the conventional drain neutralizer, but the drain passes through the drain passage passage formed in the drain neutralization chamber. As it is configured to be neutralized when passing through the gap of the neutralizing agent, unlike the configuration in which drain is accumulated and neutralized, the occurrence of biofilm can be prevented, so it can be hygienic and have a long life, It is possible to prevent the drain neutralizer from becoming heavy due to the stored drain.

  Further, in the drain neutralizer of the present invention, the drain neutralization chamber is divided into a plurality of stages in the vertical direction, and the drain overflowed through the water sealing chamber is introduced into the uppermost portion of the drain neutralization chamber, After passing through the bottom surface side of each of the steps, the drainage is neutralized by the neutralizing agent when passing through the bottom surface side of each step portion, such as passing through the bottom surface side of the step portion one step below the uppermost step portion. Since the liquid is led out from the lead-out portion, the drain can pass through each step portion while being neutralized through a long path, and the drain can be appropriately neutralized.

  A passage wall standing from the bottom side is provided on the bottom surface side of each step portion of the drain neutralization chamber, and the drain passage passage extends from the bottom side region of each step portion of the drain neutralization chamber to the extension of the passage wall. The drain passage passage is inclined (for example, gently) so that the bottom surface of the drain passage passage is positioned lower than the upstream side through which the drain flows through the drain passage passage. Therefore, the drain introduced into the drain neutralization chamber can pass slowly through the drain passage of each step portion and along the slope of the bottom surface of the drain neutralization chamber.

  In other words, in a configuration in which the drain passes in the height direction as in the drain neutralizer that has been used conventionally, the drain is gravity and the drain flows quickly, so the drain is neutralized with a neutralizing agent. Whereas it is necessary to increase the height of the neutralization region, in the present invention, the drain slowly passes through the bottom surface side of each step of the drain neutralization chamber through the drain passage and substantially horizontally. Thus, the height of the drain neutralization chamber, which is a region for neutralizing the drain, can be lowered, and the drain can be sufficiently (appropriately) neutralized with the neutralizing agent even if the height of the drain neutralizer is low.

  As described above, the drain neutralizer of the present invention can sufficiently neutralize the drain even if the height is lowered. Therefore, even if the height of the combustion device is low, the drain neutralizer can be used in the combustion device. The drain neutralizer can be provided in the case, and the weight of the drain neutralizer can be lighter than the drain neutralizer conventionally used.

  Moreover, in the conventional drain neutralizer (for example, refer to FIG. 6) in which the drain is sealed with the drain while accumulating the drain, from the upper side to the lower side of the drain neutralizer whose height is increased. The extended vertical partition wall (reference numeral 38 in FIG. 6) is necessary. However, in the present invention, the vertical partition is not required in the drain neutralization chamber. Since the weight can be reduced and the space for partitioning can be filled with the neutralizing agent, the drain neutralizer can be further downsized.

  Furthermore, in the drain neutralizer of the present invention, as described above, the drain passage chamber is provided with a drain water-sealed chamber on the upstream side of the drain neutralizing chamber, so the drain accumulated in the water-sealed chamber is before neutralization. Therefore, the acidity is high, and “algae” and the like hardly grow in the water-sealed room. That is, since the conventional drain neutralizer performs water sealing of the drain in the neutralizing agent, the nitrogen oxide in the exhaust gas reacts with the neutralizing agent such as calcium carbonate to cause growth of “algae” and the like. Although it was an advantageous “nitrogen fertilizer”, “algae” might grow between the calcium carbonate grains, causing drain clogging. Since it is carried out in the previous stage of reaching the sum, the generation of “algae” and the like can be suppressed. Such a structure is used in repairing a combustion apparatus that cannot be repaired without removing the bathtub, for example, because there is a combustion device in the back of the bathtub (for example, such a configuration is applied to the combustion apparatus of the present invention). It is a very effective structure.

  Even if such a small and light drain neutralizer is provided on the lower side of the tip of the combustion device case, stress based on the lever principle is applied to the combustion device case (see arrow F in FIG. 7). Since this can be suppressed, it is not necessary to remarkably increase the strength of the case of the combustion device, and the cost of the combustion device can be prevented from increasing.

  Furthermore, the combustion device is often provided outdoors, and a drain freeze prevention heater is provided in the drain neutralizer. Conventionally, neutralization is performed while collecting the drain in the neutralizer. Therefore, the amount of stored drainage is large, and the freeze prevention heater used has a large wattage. On the other hand, in the present invention, although a small amount of drain is stored in the water seal chamber, in the drain neutralization chamber, when passing through a plurality of solid neutralizing agent gaps without storing drain. Since the amount of drain to be stored is smaller than in the prior art, even a small heater with a small wattage can sufficiently prevent freezing.

  Note that, for example, in a combustion apparatus provided outdoors, when the wind is too strong, a function of automatically stopping burner combustion in the combustion apparatus is often provided. In such a combustion apparatus, the wind is strong. If it is too much, drainage will not occur. Even in such a combustion apparatus, in the drain neutralizer configured to accumulate drain as in the prior art, the drain accumulated before the burner combustion stop is in a state accumulated in the drain neutralizer, which is heavy. , The stress due to the drain neutralizer and the stress due to the strong wind are applied to the combustion device. However, when the present invention is applied, if the wind is too strong, no drain is generated, so the inside of the drain neutralization chamber The neutralizer is in a dry state, and the drain neutralizer can make the drain generated by burner combustion even lighter than when it passes through the drain neutralization chamber, so the stress on the case of the combustion device is further reduced. Because it can, even if the wind is too strong, it will not cause any trouble.

  In addition, by forming the drain passage passage in such a manner that the drain meanders and passes through the bottom surface side of each step portion, the length that the drain passes can be formed longer.

  In addition, when the liquid flows, since the size in the width direction (direction intersecting the flow direction) tends to become wider toward the downstream side, the passage through which the liquid flows is more downstream than the upstream side of the flow. It is easier to flow smoothly if the passage width is wide. Therefore, in the drain neutralizer, the drain passage passage is formed for each step so that the downstream side becomes wider continuously or stepwise than the upstream side along which the drain flows along the drain passage passage. Accordingly, it is possible to neutralize the drain more efficiently than neutralizing the drain through the drain passage passage of the drain neutralizing chamber.

  Furthermore, by installing the combustion apparatus of the present invention in a wall hole formed in the bathroom wall instead of the balance bath, for example, the bath space can be effectively used. In addition, the combustion apparatus of the present invention can be an inexpensive combustion apparatus in which an increase in cost is suppressed, and can also perform combustion with high efficiency by including a latent heat recovery heat exchanger. Drain generated in the heat exchanger for recovery can be efficiently neutralized by the drain neutralizer, and the exhaust gas flowing with the drain can be sealed with water, making it an excellent combustion device that can be used safely and comfortably. It can be.

  The combustion device provided in the wall hole of the bathroom is a horizontal type combustion device whose lateral length is larger than the height. In such a combustion device, the burner is burned into the device from the outside of the device. The intake port for introducing the air is often provided on the lower side of the heat exchanger for recovering latent heat, and in the area where the intake port is disposed, rain or the like is prevented from entering the combustion device. Although a rain protection plate is provided, if the drain neutralizer of the present invention is provided on the lower side of the latent heat recovery heat exchanger and is arranged near the intake port, the drain neutralizer container causes rain from the intake port. Etc. can be prevented from entering the apparatus, and it is also possible to omit the rain-preventing plate, thereby simplifying the apparatus.

It is a disassembled perspective view which shows typically one Example of the drain neutralizer which concerns on this invention. It is typical explanatory drawing explaining the drain passage operation | movement of an Example by AA 'sectional drawing (a) of FIG. 1, and the top view (b) of each step part of a drain neutralization chamber. It is the typical perspective view which looked at the upper stage drain neutralization chamber applied to the drain neutralizer of a present Example from the angle different from FIG. It is a typical system figure which shows one Example of the combustion apparatus provided with the drain neutralizer which concerns on this invention. It is the figure which looked at part of the case wall through the example of the combustion apparatus provided with the drain neutralizer according to the present invention. It is explanatory drawing which shows the example of the conventional drain neutralizer. It is typical explanatory drawing for demonstrating the system structural example of the combustion apparatus provided with the conventional heat exchanger for latent heat collection | recovery. It is explanatory drawing which shows the bathroom structure which removed the balance bath and installed the large bathtub only in the installation space in the bath installation space. It is explanatory drawing which shows the bathroom structure which provided the balance bath pot and the bathtub side by side in the bath installation space.

  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 names as those in the conventional example, and the duplicate description is omitted or simplified.

FIG. 1 is a schematic exploded perspective view showing an embodiment of a drain neutralizer according to the present invention, and FIG. 2A is a schematic cross-sectional view taken along line AA ′ of the drain neutralizer. Has been shown. The drain neutralizer 2 is formed of a resin that does not rust even when exposed to water, such as polypropylene. As shown in FIGS. 1 and 2A, the drain neutralizer 2 is the outermost of the upper opening (upper end opening). A case member 39 that is a case, an inner case 41 that is a case of an upper opening (upper end opening) that is inserted and arranged inside the upper portion of the case member 39, and a lid that covers the upper opening of the case member 39 and the inner case 41 The drain introduction part 3 which introduces the drain which generate | occur | produces in the heat exchanger 6 for a latent heat recovery of a combustion apparatus is formed in the cover member 36. 2B schematically shows a plan view (upper stage) of the inner case 41 and a plan view (lower stage) of the case member 39. FIG.

  As shown in FIGS. 1 and 2, a drain passage chamber 7 through which drain introduced from the drain introduction portion 3 passes is formed by the case member 39 and the inner case 41, and the drain passage chamber 7 is formed in the case member 39. A drain lead-out portion 9 for leading the drain that has passed through 7 to the outside is formed.

  The drain passage chamber 7 includes an exhaust water seal chamber 11 provided in communication with the drain introduction portion 3, and a drain neutralization chamber 12 provided in communication with the water seal chamber 11. 11 and the drain neutralization chamber 12 are arranged adjacent to each other in the horizontal direction by a partition wall 13. The water seal chamber 11 is an exhaust water seal chamber that seals the exhaust gas flowing together with the drain from the side of the latent heat recovery heat exchanger 6 (see FIG. 4 and the like) with the drain. ) Shows the state in which the exhaust gas is sealed by introducing the drain into the water-sealed chamber 11 with hatching in the water-sealed chamber 11.

  The drain neutralization chamber 12 is divided into a plurality of stages (in this case, two stages) vertically, the drain neutralization chamber 12a (upper stage) is formed in the inner case 41, and the drain neutralization chamber 12b (lower stage) is the case. The member 39 is formed. A perspective view of the drain neutralization chamber 12a is also shown in FIG.

  The drain neutralization chamber 12 is a neutralization chamber that neutralizes the drain that flows from the water seal chamber 11, and each step (in this case, the upper step and the lower step) of the drain neutralization chamber 12 includes, for example, FIG. As shown, a plurality of solid neutralizing agents 34 (not shown in FIGS. 1 and 2 (b)) formed of natural calcium carbonate are filled with gaps through which drain passes. Has been. A slit 33 is formed in a part of the partition wall 13 that partitions the water sealing chamber 11 and the drain neutralization chamber 12 so that the neutralizing agent 34 can be prevented from entering the water sealing chamber 11.

  If the inner case 41 is to be placed on the neutralizing agent 34 up to the upper end of the drain neutralizing chamber 12b of the case member 39, the entire neutralizing agent 34 is filled in the drain neutralizing chamber 12b. For example, the case member 39 is shaken after the inner case 41 is placed in a state where the neutralizing agent 34 is put to about 80% of the height of the drain neutralization chamber 12b (see Hb in FIG. 2A). The neutralizer 34 provided in the inner case 41 is moved from the inner case 41 (upper drain neutralizer 12a) to the lower drain neutralizer 12b side through the opening K (see FIG. 2B). Thereby, the filling rate of the neutralizing agent 34 in the drain neutralization chamber 12b can be improved.

  The type of the neutralizing agent 34 is not particularly limited and is appropriately set. The neutralizing agent 34 may be formed of synthesized artificial calcium carbonate or other neutralizing agent. . In FIG. 2A, only a part of the neutralizing agent 34 is shown for simplification of the drawing, but the neutralizing agent 34 is disposed in the entire region of the drain neutralizing chamber 12 (12a, 12b). . Further, the size of the drain neutralizer 2 is not limited and is set as appropriate. For example, the length L in FIG. 1 is 18 cm, the length W is 11 cm, and the height H is 11 cm. (Note that FIGS. 1 to 3 are schematic views and are different from this size).

  On the bottom side of each stage (upper stage and lower stage) of the drain neutralization chamber 12, a passage wall 14 erected from the bottom side is provided, and the drain extends through the bottom side region of the drain neutralization chamber 12 in the extending direction of the passage wall 14. A drain passage 15 is formed to pass along In the present embodiment, the drain passage passage 15 is formed in such a manner that the drain passes in a meandering manner through the bottom surface side of each of the upper and lower steps, and the length of the drain passage passage 15 combining the upper step and the lower step. For example, it is formed in 80 cm or more. Further, the bottom surface of the drain passage passage 15 is inclined so that the downstream side is lower than the upstream side through which the drain flows through the drain passage passage 15, and the inclination angle is not particularly limited. For example, the X direction in FIG. 2B is formed at about 1.5 degrees and the Y direction at about 3 degrees.

  In this embodiment, as shown in FIG. 2A, the drain is introduced from the drain introduction part 3 into the drain neutralizer 2, passes through the water seal chamber 11, and the overflowed drain is slit in the partition wall 13. 2 is introduced into the uppermost portion of the drain neutralization chamber 12 (in this embodiment, the upper drain neutralization chamber 12a), passes through the drain passage 15 of the drain neutralization chamber 12a, and is shown in FIG. So that it passes through the bottom surface side of the drain neutralization chamber 12a at the uppermost stage, and then passes through the bottom surface side of the lower stage (in this embodiment, the lower drain neutralization chamber 12b) one stage below the uppermost stage. When passing through the bottom surface side of each step portion, such as passing through the passage 15, it is neutralized by the neutralizing agent 34 and stored inside the drain neutralizer 2 except for the water seal chamber 11. Not from the drain outlet 9 Forms configured to be derived.

  The drain neutralizer 2 of this embodiment is provided with a drain freezing prevention heater (not shown). The heater neutralizes the drain while accumulating the drain in the neutralizer 2. Compared to the freeze prevention heater provided in the conventional example of the configuration derived in this way, a heater having a small size and a small wattage is applied.

  In other words, the conventional drain neutralizer used a large wattage to prevent the freezing of a large amount of drain in order to neutralize while accumulating drain. Although a small amount of drain is stored in the sealed chamber 11, the drain neutralization chamber 12 is neutralized when passing through a plurality of solid neutralizing agent gaps without storing drain. Therefore, since the amount of drain to be stored is smaller than in the conventional case, the drain can be sufficiently prevented from freezing with a small heater having a small wattage.

  Further, in this example, a neutralizing agent such as solid (stone-like) calcium carbonate is used, and such a solid (stone-like) neutralizing agent has a lower thermal conductivity than a metal or the like. Therefore, even if the neutralizing agent is cold, it is difficult for the drain to freeze while passing between the neutralizing agents, so the freezing prevention heater can be used even smaller and with less wattage, There is an energy saving effect.

  FIG. 4 shows an embodiment of a combustion apparatus (hot water heater 17) provided with the drain neutralizer 2 of this embodiment in a schematic system configuration diagram. FIG. 5 shows this hot water heater. 17 shows a partial cross-sectional structure. This hot water heater 17 is installed in a wall hole 16 formed in the bathroom wall 10, for example, as in the conventional example. Although the heat exchanger 6 is provided, in this embodiment, the drain neutralizer 2 shown in FIGS. 1 and 2 is further provided in the instrument case 40. In addition, the code | symbol 23 of FIG. 5 shows a water supply pipe, and the code | symbol 24 shows a hot water supply pipe | tube, respectively. The thickness of the bathroom wall 10 is not particularly limited, but is generally about 150 mm to 300 mm, and the examples shown in FIGS. 4 and 5 show a wall having a thickness of about 150 mm, for example.

  The drain neutralizer 2 is provided below the combustion chamber 20 on the lower side of the latent heat recovery heat exchanger 6 and is disposed near the intake port 19. In FIG. 4, the drain neutralizer 2 is shown using the cross-sectional view shown in FIG. 2A, and therefore the drain outlet 9 of the drain neutralizer 2 is not shown. For example, the drain outlet 9 is disposed on the front side of the drawing and the drain that has passed through the drain neutralizer 2 passes through the drain discharge pipe 32 in which a downward slope is formed toward the bathroom 30 side. , Flows out toward the outside of the instrument case 40 and is discharged into the bathroom 30. Further, the position near the drain introduction part 3 of the drain neutralizer 2 receives the pressure outside the combustion chamber 20 and the pressure of the combustion fan 5, and the inside of the drain neutralizer 2 receives the pressure inside the bathroom. . For this reason, the water level of the drain in the drain water sealing chamber 11 is often lower during combustion of the hot water supply burner 1 than during non-combustion.

  As shown in FIG. 4, for example, the water heater 17 is fixed using a fixing member such as a screw 35, but the illustration of the screw is omitted in FIG. 5. Moreover, the broken-line frame D of FIG. 5 shows the example of arrangement | positioning in the case of providing the drain neutralizer with high height as shown in FIG. The drain neutralizer can also be provided in the water heater 17, but in that case, the horizontal length of the water heater 17 is increased by a length corresponding to the width of the drain neutralizer (Dw, 7), the stress based on the lever principle indicated by the arrow F in FIG. 7 increases and acts on the case of the water heater 17, and the appliance case of the water heater 17 is formed at the corner of the wall hole 16 shown in FIG. There is also a problem that 40 hits.

  In addition, this invention is not limited to the said Example, Various aspects can be taken. For example, in the above-described embodiment, the drain neutralization chamber 12 has a two-stage configuration of an upper stage and a lower stage, but may be formed in an appropriate plurality of stages of three or more stages.

  Further, the width of the drain passage 15 is appropriately formed. For example, the drain passage 15 is formed so that the downstream side becomes wider continuously or stepwise than the upstream side where the drain flows for each step portion. May be.

  Furthermore, in the said Example, although the drain passage passage 15 was formed in the aspect through which a drain meanders and passes the bottom face side of each step part, the drain passage passage 15 is formed in the aspect in which drain circulates and passes, for example. The formation mode of the drain passage 15 may be appropriately set.

  Furthermore, although the said Example demonstrated the gas combustion type water heater 17 as a combustion apparatus, if the combustion apparatus of this invention is not restricted to a water heater and has a heat exchanger for latent-heat recovery, it will be a bath. An appropriate combustion device such as a kettle can be applied. Also, the combustion method may be an oil combustion type, and the system configuration of the combustion apparatus is not particularly limited, and is set as appropriate.

  Further, in the above embodiment, the example in which the water heater 17 is installed in the wall hole 16 of the bathroom 30 has been described. However, the arrangement position of the combustion device such as the water heater 17 is appropriately set, and FIG. However, the combustion device is not limited to the horizontal type as shown in Fig. 1, and may be a vertical type (longitudinal) combustion device.

  The present invention can form a small, lightweight and sanitary drain neutralizer, and even if a drain neutralizer is provided at the lower end of the inside of the combustion device, it is not necessary to remarkably increase the strength of the case of the combustion device. Since the cost of the apparatus can be reduced, it can be applied to, for example, a household combustion apparatus.

DESCRIPTION OF SYMBOLS 1 Burner 2 Drain neutralizer 3 Drain introduction part 4 Main heat exchanger 5 Combustion fan 6 Heat exchanger for latent heat recovery 7 Drain passage room 9 Drain outlet part 10 Bathroom wall 11 Water seal room 12, 12a, 12b Drain neutralization room 13 Bulkhead 14 Passage Wall 15 Drain Passage Passage 16 Wall Hole 26 Bathtub 34 Neutralizing Agent 40 Instrument Case

Claims (7)

A drain introduction part for introducing drain generated in a heat exchanger for recovering latent heat of the burner, a drain passage chamber through which the drain introduced from the drain introduction part passes, and a drain that has passed through the drain passage chamber The drain passage chamber is provided in communication with the drain introduction portion, and the exhaust gas flowing together with the drain from the latent heat recovery heat exchanger side is drained by the drain. An exhaust water sealing chamber for sealing, and a drain neutralizing chamber that is provided in communication with the water sealing chamber and neutralizes the drain flowing from the water sealing chamber. A plurality of solid neutralizing agents are filled with a gap through which the drain flows, and the water sealing chamber and the drain neutralizing chamber are arranged side by side in a horizontal direction through a partition wall, and the drain neutralizing chamber is Divided into multiple stages The drain that overflows through the water seal chamber is introduced into the uppermost step portion of the drain neutralization chamber, and a passage that stands from the bottom surface side of each step portion of the drain neutralization chamber There is provided a wall, and a drain passage passage is formed through which the drain passes through a bottom side region of each step portion of the drain neutralization chamber along the extending direction of the passage wall, and the bottom surface of the drain passage passage passes through the drain. The slope is formed so that the downstream side is lower than the upstream side where the drain flows through the passage, and the drain introduced into the drain passage chamber passes through the water seal chamber and then the drain neutralization chamber. The bottom surface side of each step portion passes through the drain passage of the top step portion, passes through the bottom surface side of the top step portion, and then passes through the bottom surface side of the step portion one step lower than the top step portion. By the neutralizing agent when passing through Neutralized a de Len neutralizer that not make a structure derived to the outside from the drain outlet section, said drain neutralizer, height respectively different upper opening from the bottom to the upper opening The case having the highest height from the bottom surface to the upper end opening is disposed on the outermost side as a case member, and the height is the second inside the upper portion of the case member. One or more inner cases are sequentially inserted and arranged in order of decreasing the height inside the upper part of the case member having the highest height, such that the higher case is inserted and arranged as an inner case. The space between the bottom wall of the outer case and the inner case and the space in the innermost case, which are inserted into each other, constitute the drain passage chamber, and the bottom wall of the inner case disposed inside the case member Neutralization chamber The drain neutralization chamber is formed in a plurality of stages as means for partitioning up and down, and is formed on the bottom surface of each inner case disposed on the inner side of the case member serving as the outermost case. Is a drain neutralizer characterized in that an opening is formed for allowing the drain that has passed through the drain passage of the drain neutralization chamber formed on the bottom surface to flow into the lower drain neutralization chamber . A drain introduction part for introducing drain generated in a heat exchanger for recovering latent heat of the burner, a drain passage chamber through which the drain introduced from the drain introduction part passes, and a drain that has passed through the drain passage chamber The drain passage chamber is provided in communication with the drain introduction portion, and the exhaust gas flowing together with the drain from the latent heat recovery heat exchanger side is drained by the drain. An exhaust water sealing chamber for sealing, and a drain neutralizing chamber that is provided in communication with the water sealing chamber and neutralizes the drain flowing from the water sealing chamber. A plurality of solid neutralizing agents are filled with a gap through which the drain flows, and the water sealing chamber and the drain neutralizing chamber are arranged side by side in a horizontal direction through a partition wall, and the drain neutralizing chamber is Divided into multiple stages The drain that overflows through the water seal chamber is introduced into the uppermost step portion of the drain neutralization chamber, and a passage that stands from the bottom surface side of each step portion of the drain neutralization chamber There is provided a wall, and a drain passage passage is formed through which the drain passes through a bottom side region of each step portion of the drain neutralization chamber along the extending direction of the passage wall, and the bottom surface of the drain passage passage passes through the drain. The slope is formed so that the downstream side is lower than the upstream side where the drain flows through the passage, and the drain introduced into the drain passage chamber passes through the water seal chamber and then the drain neutralization chamber. The bottom surface side of each step portion passes through the drain passage of the top step portion, passes through the bottom surface side of the top step portion, and then passes through the bottom surface side of the step portion one step lower than the top step portion. By the neutralizing agent when passing through Is neutralized and forms a structure which is led outside from the drain outlet portion, said drain passage passages, each stepped portion, continuously or stepwise is more downstream than the upstream flow of condensate A drain neutralizer characterized by being formed to be wide . The drain neutralizer according to claim 1 or 2, wherein the drain passage is formed in such a manner that the drain meanders on the bottom side of each step portion. Drain passage passages, each stepped portion, in the drain of claim 1, wherein the direction of the downstream side from the upstream side through which the drain is continuously or stepwise formed so as to wider Japanese machine. The burner, a latent heat recovery heat exchanger that recovers the exhaust heat of the burner in a case installed in a wall hole formed in the bathroom wall, and the heat exchanger according to any one of claims 1 to 4 . A combustion apparatus comprising a drain neutralizer. A burner, a latent heat recovery heat exchanger for recovering the exhaust latent heat of the burner, and a drain neutralizer are provided in a case installed in a wall hole formed in the bathroom wall. The apparatus has a drain introduction part for introducing drain generated by a heat exchanger for recovering latent heat of the burner, a drain passage chamber through which drain introduced from the drain introduction part passes, and a drain passage chamber. A drain lead-out portion for leading the drain that has passed to the outside, and the drain passage chamber is provided in communication with the drain introduction portion, and exhausts flowing together with the drain from the latent heat recovery heat exchanger side. An exhaust water sealing chamber sealed with drain, and a drain neutralization chamber provided in communication with the water sealing chamber to neutralize the drain flowing from the water sealing chamber. A plurality of solid neutralizing agents are contained in the room. The water sealing chamber and the drain neutralization chamber are arranged horizontally next to each other through a partition wall, and the drain neutralization chamber is divided into a plurality of stages in the vertical direction, The drain overflowed through the water sealing chamber is introduced into the uppermost step portion of the drain neutralization chamber, and a passage wall standing from the bottom side is provided on the bottom surface side of each step portion of the drain neutralization chamber. Thus, a drain passage passage is formed in which the drain passes through the bottom side region of each step portion of the drain neutralization chamber along the extending direction of the passage wall, and the bottom surface of the drain passage passage passes through the drain passage passage. And the uppermost portion of the drain neutralization chamber after the drain introduced into the drain passage chamber passes through the water seal chamber. The dore When passing the bottom side of each step, such as passing the bottom side of the top step through the passage and then passing the bottom side of the step one step below the top step, A combustion apparatus characterized in that it is neutralized by a neutralizing agent and led out to the outside from the drain lead-out part. The combustion apparatus according to claim 6, wherein the drain passage passage is formed such that the drain meanders on the bottom side of each stepped portion.

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