JP5256882B2

JP5256882B2 - Water heater

Info

Publication number: JP5256882B2
Application number: JP2008166546A
Authority: JP
Inventors: 淳土井; 和則長谷川; 優福沢; 英明吉富; 康成奥田; 宏樹長谷川; 達彦好田
Original assignee: Noritz Corp
Current assignee: Noritz Corp
Priority date: 2008-06-25
Filing date: 2008-06-25
Publication date: 2013-08-07
Anticipated expiration: 2028-06-25
Also published as: JP2010007929A

Description

本発明は、一次熱交換器において燃焼熱の顕熱により入水（水や低温水）を加熱して給湯させる際に、加熱後の燃焼排ガスが有する潜熱を二次熱交換器においてさらに回収することにより熱利用の高効率化を図るようにした潜熱回収型の給湯装置に関し、特に潜熱回収の際に生じるドレン水を中和処理するための中和器を付設するにあたり、不都合を招くことなく給湯装置全体のコンパクト化を実現させ得る技術に係る。 The present invention further recovers the latent heat of the combustion exhaust gas after heating in the secondary heat exchanger when the incoming water (water or low temperature water) is heated by the sensible heat of the combustion heat in the primary heat exchanger to supply hot water. With regard to the latent heat recovery type hot water supply device designed to increase the efficiency of heat utilization by using a hot water supply without inconvenience, particularly when a neutralizer for neutralizing drain water generated during the recovery of latent heat is attached. The present invention relates to a technology capable of realizing a compact apparatus as a whole.

一般に、潜熱回収型の給湯装置とは、いわゆるコンデンシング型の給湯装置又は高効率型の給湯装置とも言われている。このような潜熱回収型の給湯装置においては、顕熱回収用の一次熱交換器を通過した後の燃焼排ガスを潜熱回収用の二次熱交換器に導入して潜熱を回収する際に、その燃焼排ガスが二次熱交換器と接触することにより燃焼排ガス中の水蒸気が凝縮・結露してドレン水（結露水）を生じることになる。このドレン水は、燃焼排ガスから取り込んだ窒素酸化物（ＮＯｘ）や硫黄酸化物（ＳＯｘ）等を含んで強酸性になっているため、外部に排水するには少なくとも中和処理を施す必要があり、通常は、ドレン水を集めて中和処理を行うために、中和器を給湯装置に内蔵・設置することが行われている。 In general, the latent heat recovery type hot water supply apparatus is also referred to as a so-called condensing type hot water supply apparatus or a highly efficient hot water supply apparatus. In such a latent heat recovery type hot water supply device, when the combustion exhaust gas after passing through the primary heat exchanger for sensible heat recovery is introduced into the secondary heat exchanger for latent heat recovery and the latent heat is recovered, When the combustion exhaust gas comes into contact with the secondary heat exchanger, the water vapor in the combustion exhaust gas is condensed and condensed to generate drain water (condensation water). Since this drain water contains nitrogen oxides (NOx) and sulfur oxides (SOx) taken from combustion exhaust gas and is strongly acidic, it is necessary to at least neutralize it to drain it to the outside. Usually, in order to collect drain water and perform neutralization treatment, a neutralizer is built in and installed in a hot water supply device.

このような給湯装置として、従来、一次熱交換器の下流側の排気集合筒内に二次熱交換器を設置し、この二次熱交換器で発生したドレン水を上記排気集合筒の下側位置に設置した中和器に導水するようにしたものが知られている（例えば特許文献１参照）。又、二次熱交換器を一次熱交換器の上側位置に設置し、二次熱交換器で発生したドレン水を上記一次熱交換器の前側位置に設置した中和器に導水するようにしたものも知られている（例えば特許文献２参照）。 As such a hot water supply device, conventionally, a secondary heat exchanger is installed in an exhaust collecting cylinder downstream of the primary heat exchanger, and the drain water generated in the secondary heat exchanger is disposed below the exhaust collecting cylinder. One in which water is introduced to a neutralizer installed at a position is known (see, for example, Patent Document 1). Also, the secondary heat exchanger is installed at the upper position of the primary heat exchanger, and the drain water generated by the secondary heat exchanger is introduced to the neutralizer installed at the front position of the primary heat exchanger. The thing is also known (for example, refer patent document 2).

特開２００６−１０５４６７号公報JP 2006-105467 A 特開２０００−１６１７８８号公報JP 2000-161788 A

ところで、給湯装置を潜熱回収型に構成するには、そうでないタイプの給湯装置に対し二次熱交換器と中和器とを新たに追加する必要がある。このため、上記の特許文献１に開示された例では排気集合筒の下側位置に設置した中和器によって給湯装置の外装ケーシングの上下方向寸法（高さ）がより大きくなったり、上記の特許文献２に開示された例では給湯装置の外装ケーシングの前後方向寸法（奥行き寸法）がより大きくなったりすることになる。例えば図６に例示する給湯装置は上記文献１に開示されたものの構成例であるが、この構成例であると、二次熱交換器１０１を排気集合筒１０２内に設置し、中和剤が充填された中和槽部１０３ａと燃焼排ガスの漏出防止用の排気シール部１０３ｂとが互いに一体化された中和器１０３を排気集合筒１０１の下側位置に設置し、これらを架台１０４上に載置している。そして、架台１０４の下部空間１０５を入水管１０６や出湯管１０７等の配管系や電装機器等の設置スペースとしている。この場合には、潜熱回収型ではないタイプの給湯装置に比して、二次熱交換器１０２と、中和器１０３との追加要素の分だけ外装ケーシング１０８が上下方向に拡大して給湯装置全体のサイズがより大きくなってしまうことになる。 By the way, in order to configure the hot water supply apparatus to be a latent heat recovery type, it is necessary to newly add a secondary heat exchanger and a neutralizer to a hot water supply apparatus of the other type. For this reason, in the example disclosed in the above-mentioned Patent Document 1, the vertical dimension (height) of the outer casing of the hot water supply device becomes larger by the neutralizer installed at the lower position of the exhaust collecting cylinder, In the example disclosed in Document 2, the front-rear direction dimension (depth dimension) of the outer casing of the hot water supply device becomes larger. For example, the hot water supply apparatus illustrated in FIG. 6 is a configuration example of the one disclosed in the above-mentioned document 1, but in this configuration example, the secondary heat exchanger 101 is installed in the exhaust collecting cylinder 102, and the neutralizing agent is installed. A neutralizer 103 in which a filled neutralization tank portion 103 a and an exhaust seal portion 103 b for preventing leakage of combustion exhaust gas are integrated with each other is installed at a lower position of the exhaust collecting cylinder 101, and these are placed on the gantry 104. It is placed. The lower space 105 of the gantry 104 is used as an installation space for piping systems such as a water inlet pipe 106 and a hot water outlet pipe 107, and electrical equipment. In this case, the outer casing 108 expands in the vertical direction by an amount corresponding to the additional elements of the secondary heat exchanger 102 and the neutralizer 103 as compared with a non-latent heat recovery type hot water supply apparatus. The overall size will be larger.

そこで、給湯装置自体の小型化・コンパクト化を図るために、ドレン水の処理系統、つまり中和器１０３を外装ケーシング１０８の外部に設置して外装ケーシング１０８内に設置する要素を少なくするようにすることが考えられる。しかしながら、このような構成を採用すると、外部設置の中和器は給湯装置を構成する外装ケーシングを対象現場に設置・固定した後に、給水配管等の配管接続と共に、中和器の接続作業を現場にて行うことになってしまうことになる。つまり、製造工場での組み立て工程における均質な組み付けではくて、個々の現場での個別の接続作業により中和器が接続されることになる。この結果、作業のバラツキ等に起因して接続部位のシール不良が万一生じたりすると、燃焼排ガスが漏出する事態を招くことになりかねないことにもなる。 Therefore, in order to reduce the size and size of the hot water supply device itself, the drain water treatment system, that is, the neutralizer 103 is installed outside the outer casing 108 to reduce the number of elements installed in the outer casing 108. It is possible to do. However, when such a configuration is adopted, the externally installed neutralizer installs and fixes the outer casing constituting the hot water supply device at the target site, and then connects the neutralizer together with the pipe connection of the water supply piping etc. It will be done in. In other words, the neutralizer is connected by individual connection work at each site, not by a homogeneous assembly in the assembly process at the manufacturing factory. As a result, in the unlikely event that a sealing failure occurs at the connection site due to work variation or the like, it may lead to a situation where combustion exhaust gas leaks out.

本発明は、このような事情に鑑みてなされたものであり、その目的とするところは、潜熱回収用の二次熱交換器と、二次熱交換器で発生するドレン水を処理するための中和器とを設置して潜熱回収型に構成する上で、不都合発生のおそれを回避しつつ装置全体のコンパクト化を図り得る給湯装置を提供することにある。 This invention is made | formed in view of such a situation, The place made into the objective is for processing the drain water which generate | occur | produces in the secondary heat exchanger for a latent heat recovery, and a secondary heat exchanger. It is an object of the present invention to provide a hot water supply apparatus that can reduce the overall size of the apparatus while avoiding the possibility of inconvenience when a neutralizer is installed to configure a latent heat recovery type.

上記目的を達成するために、請求項１に係る発明では、燃料を燃焼させて燃焼ガスを発生させるバーナと、このバーナの燃焼により発生する燃焼ガスから顕熱を回収する一次熱交換器と、この一次熱交換器を通過した後の燃焼排ガスから潜熱を回収する二次熱交換器と、この二次熱交換器において発生するドレン水を導いて中和処理する中和器と、外装ケーシングとを備えた給湯装置を対象にして次の特定事項を備えることとした。すなわち、上記中和器として、ドレン水を中和処理する中和槽部と、この中和槽部の入口側において上記二次熱交換器からの燃焼排ガスの流入を水封シールにより阻止した状態でドレン水を導入する排気シール部とを備えて構成する。そして、上記排気シール部として、上記外装ケーシング内に予め設置され、かつ、ドレン水の導出管部が下方に延ばされてその下端部において接続端部を備えたものとする。又、上記中和槽部として、上記外装ケーシング外に配設された状態で、上記排気シール部の接続端部との間で上記外装ケーシングを内外に貫通して互いに接続させることにより上記導出管部と連通接続させ得る接続端部を備えたものとする。加えて、上記排気シール部の接続端部と、中和槽部の接続端部とが互いに接続されていることを検知する接続検知手段と、この接続検知手段からの接続検知信号の出力の有無を監視して上記バーナの燃焼作動を許可又は禁止する制御手段とを備えるようにした。 In order to achieve the above object, in the invention according to claim 1, a burner that burns fuel to generate combustion gas, a primary heat exchanger that recovers sensible heat from the combustion gas generated by combustion of the burner, A secondary heat exchanger that recovers latent heat from the flue gas after passing through the primary heat exchanger, a neutralizer that conducts a neutralization treatment by introducing drain water generated in the secondary heat exchanger, and an outer casing; The following specific items were provided for a hot water supply apparatus equipped with That is, as the neutralizer, a neutralization tank section for neutralizing drain water, and a state in which inflow of combustion exhaust gas from the secondary heat exchanger is blocked by a water seal at the inlet side of the neutralization tank section And an exhaust seal portion for introducing drain water. And as the said exhaust seal part, it is previously installed in the said exterior casing, and the drain pipe | tube part of drain water is extended below, and the connection end part was provided in the lower end part. Further, the lead-out pipe is formed by penetrating the outer casing in and out between the neutralizing tank portion and the connection end portion of the exhaust seal portion while being disposed outside the outer casing. It is assumed that a connection end portion that can be connected in communication with the portion is provided . In addition, connection detection means for detecting that the connection end of the exhaust seal part and the connection end of the neutralization tank part are connected to each other, and whether or not a connection detection signal is output from the connection detection means And a control means for permitting or prohibiting the combustion operation of the burner.

請求項２に係る発明では、燃料を下向きに燃焼させて燃焼ガスを発生させるバーナと、このバーナの下方位置に配設されて上記燃焼により発生する燃焼ガスから顕熱を回収する一次熱交換器と、この一次熱交換器を下向きに通過した後の燃焼排ガスを集合させる排気集合筒と、この排気集合筒内に配設されて上記燃焼排ガスから潜熱を回収する二次熱交換器と、上記排気集合筒から上向きに延びて上記二次熱交換器を通過した後の燃焼排ガスを排出させる排気管と、上記二次熱交換器において発生するドレン水を導いて中和処理する中和器と、外装ケーシングとを備えた給湯装置を対象にして次の特定事項を備えることとした。すなわち、上記中和器として、ドレン水を中和処理する中和槽部と、この中和槽部の入口側において上記二次熱交換器からの燃焼排ガスの流入を水封シールにより阻止した状態でドレン水を導入する排気シール部とを備えて構成する。そして、上記排気シール部として、上記外装ケーシング内に予め設置され、かつ、ドレン水の導出管部が下方に延ばされてその下端部において接続端部を備えたものとする。又、上記中和槽部として、上記外装ケーシング外に配設された状態で、上記排気シール部の接続端部との間で上記外装ケーシングを内外に貫通して互いに接続させることにより上記導出管部と連通接続させ得る接続端部を備えたものとする。加えて、上記排気シール部の接続端部と、中和槽部の接続端部とが互いに接続されていることを検知する接続検知手段と、この接続検知手段からの接続検知信号の出力の有無を監視して上記バーナの燃焼作動を許可又は禁止する制御手段とを備えるようにした。 In the invention according to claim 2, a burner that burns fuel downward to generate combustion gas, and a primary heat exchanger that is disposed below the burner and recovers sensible heat from the combustion gas generated by the combustion. An exhaust collecting cylinder that collects the flue gas after passing downward through the primary heat exchanger, a secondary heat exchanger that is disposed in the exhaust collecting cylinder and collects latent heat from the flue gas, and An exhaust pipe that extends upward from the exhaust tube and discharges the combustion exhaust gas after passing through the secondary heat exchanger; and a neutralizer that conducts neutralization treatment by introducing drain water generated in the secondary heat exchanger; The following specific items are provided for a hot water supply device including an exterior casing. That is, as the neutralizer, a neutralization tank section for neutralizing drain water, and a state in which inflow of combustion exhaust gas from the secondary heat exchanger is blocked by a water seal at the inlet side of the neutralization tank section And an exhaust seal portion for introducing drain water. And as the said exhaust seal part, it is previously installed in the said exterior casing, and the drain pipe | tube part of drain water is extended below, and the connection end part was provided in the lower end part. Further, the lead-out pipe is formed by penetrating the outer casing in and out between the neutralizing tank portion and the connection end portion of the exhaust seal portion while being disposed outside the outer casing. It is assumed that a connection end portion that can be connected in communication with the portion is provided . In addition, connection detection means for detecting that the connection end of the exhaust seal part and the connection end of the neutralization tank part are connected to each other, and whether or not a connection detection signal is output from the connection detection means And a control means for permitting or prohibiting the combustion operation of the burner.

請求項３に係る発明では、燃料を下向きに燃焼させて燃焼ガスを発生させるバーナと、このバーナの下方位置に配設されて上記燃焼により発生する燃焼ガスから顕熱を回収する一次熱交換器と、この一次熱交換器を下向きに通過した後の燃焼排ガスを集合させる排気集合筒と、この排気集合筒に連通され排気集合筒から上向きに延びて燃焼排ガスを排出させる排気管と、この排気管の内部に配設されてこの排気管内に供給される燃焼排ガスから潜熱を回収する二次熱交換器と、この二次熱交換器において発生するドレン水を導いて中和処理する中和器と、外装ケーシングとを備えた給湯装置を対象にして次の特定事項を備えることとした。すなわち、上記中和器として、ドレン水を中和処理する中和槽部と、この中和槽部の入口側において上記二次熱交換器からの燃焼排ガスの流入を水封シールにより阻止した状態でドレン水を導入する排気シール部とを備えて構成する。そして、上記排気シール部として、上記外装ケーシング内に予め設置され、かつ、ドレン水の導出管部が下方に延ばされてその下端部において接続端部を備えたものとする。又、上記中和槽部として、上記外装ケーシング外に配設された状態で、上記排気シール部の接続端部との間で上記外装ケーシングを内外に貫通して互いに接続させることにより上記導出管部と連通接続させ得る接続端部を備えたものとする。加えて、上記排気シール部の接続端部と、中和槽部の接続端部とが互いに接続されていることを検知する接続検知手段と、この接続検知手段からの接続検知信号の出力の有無を監視して上記バーナの燃焼作動を許可又は禁止する制御手段とを備えるようにした。 In the invention according to claim 3, a burner that burns fuel downward to generate combustion gas, and a primary heat exchanger that is disposed below the burner and recovers sensible heat from the combustion gas generated by the combustion. An exhaust collecting cylinder for collecting the combustion exhaust gas after passing downward through the primary heat exchanger, an exhaust pipe communicating with the exhaust collecting cylinder and extending upward from the exhaust collecting cylinder to discharge the combustion exhaust gas, and the exhaust A secondary heat exchanger that is disposed inside the pipe and recovers latent heat from the flue gas supplied into the exhaust pipe, and a neutralizer that conducts neutralization treatment by introducing drain water generated in the secondary heat exchanger The following specific items are provided for a hot water supply device including an outer casing. That is, as the neutralizer, a neutralization tank section for neutralizing drain water, and a state in which inflow of combustion exhaust gas from the secondary heat exchanger is blocked by a water seal at the inlet side of the neutralization tank section And an exhaust seal portion for introducing drain water. And as the said exhaust seal part, it is previously installed in the said exterior casing, and the drain pipe | tube part of drain water is extended below, and the connection end part was provided in the lower end part. Further, the lead-out pipe is formed by penetrating the outer casing in and out between the neutralizing tank portion and the connection end portion of the exhaust seal portion while being disposed outside the outer casing. It is assumed that a connection end portion that can be connected in communication with the portion is provided . In addition, connection detection means for detecting that the connection end of the exhaust seal part and the connection end of the neutralization tank part are connected to each other, and whether or not a connection detection signal is output from the connection detection means And a control means for permitting or prohibiting the combustion operation of the burner.

請求項４に係る発明では、燃料を下向きに燃焼させて燃焼ガスを発生させるバーナと、このバーナの下方位置に配設されて上記燃焼により発生する燃焼ガスから顕熱を回収する一次熱交換器と、この一次熱交換器を下向きに通過した後の燃焼排ガスを集合させる排気集合筒と、この排気集合筒に連通され排気集合筒から上向きに延びる排気管と、この排気管の上端側位置であって上記バーナの上側位置に配設され上記排気管から燃焼排ガスの供給を受けて潜熱を回収する二次熱交換器と、この二次熱交換器において発生するドレン水を導いて中和処理する中和器と、外装ケーシングとを備えた給湯装置を対象にして次の特定事項を備えることとした。すなわち、上記中和器として、ドレン水を中和処理する中和槽部と、この中和槽部の入口側において上記二次熱交換器からの燃焼排ガスの流入を水封シールにより阻止した状態でドレン水を導入する排気シール部とを備えて構成する。そして、上記排気シール部として、上記外装ケーシング内に予め設置され、かつ、ドレン水の導出管部が下方に延ばされてその下端部において接続端部を備えたものとする。又、上記中和槽部として、上記外装ケーシング外に配設された状態で、上記排気シール部の接続端部との間で上記外装ケーシングを内外に貫通して互いに接続させることにより上記導出管部と連通接続させ得る接続端部を備えたものとする。加えて、上記排気シール部の接続端部と、中和槽部の接続端部とが互いに接続されていることを検知する接続検知手段と、この接続検知手段からの接続検知信号の出力の有無を監視して上記バーナの燃焼作動を許可又は禁止する制御手段とを備えるようにした。 In the invention according to claim 4, a burner that burns fuel downward to generate combustion gas, and a primary heat exchanger that is disposed below the burner and recovers sensible heat from the combustion gas generated by the combustion. An exhaust collecting cylinder that collects the combustion exhaust gas after passing downward through the primary heat exchanger, an exhaust pipe that communicates with the exhaust collecting cylinder and extends upward from the exhaust collecting cylinder, and an upper end side position of the exhaust pipe. A secondary heat exchanger that is disposed at the upper position of the burner and receives supply of combustion exhaust gas from the exhaust pipe and recovers latent heat; and a neutralization treatment by introducing drain water generated in the secondary heat exchanger The following specific matters were provided for a hot water supply device including a neutralizer to be operated and an outer casing. That is, as the neutralizer, a neutralization tank section for neutralizing drain water, and a state in which inflow of combustion exhaust gas from the secondary heat exchanger is blocked by a water seal at the inlet side of the neutralization tank section And an exhaust seal portion for introducing drain water. And as the said exhaust seal part, it is previously installed in the said exterior casing, and the drain pipe | tube part of drain water is extended below, and the connection end part was provided in the lower end part. Further, the lead-out pipe is formed by penetrating the outer casing in and out between the neutralizing tank portion and the connection end portion of the exhaust seal portion while being disposed outside the outer casing. It is assumed that a connection end portion that can be connected in communication with the portion is provided . In addition, connection detection means for detecting that the connection end of the exhaust seal part and the connection end of the neutralization tank part are connected to each other, and whether or not a connection detection signal is output from the connection detection means And a control means for permitting or prohibiting the combustion operation of the burner.

以上の各発明の場合、中和器の主要部分を占める中和槽部を外装ケーシング外に配設し得るため、内部に設置する場合に比して、外装ケーシングのサイズ、つまり給湯装置のサイズを小さくし得ることになる。特に、中和槽部に比してコンパクトな排気シール部を外装ケーシングの底部側方位置等の空いたスペースに設置することにより、従来の中和器全体の上下寸法だけ余分に外装ケーシングの必要上下寸法が増大していたのに比べ、外装ケーシングの上下寸法を大幅に小さくし得ることになる。又、中和槽部は給湯装置の設置現場での接続作業によって排気シール部と一体化されて中和器が完成されることになるが、万一、接続不良等が生じたとしても、排気シール部は外装ケーシング内に予め設置されているため、燃焼排ガスがその接続不良箇所から漏出するおそれはなく、燃焼排ガスの漏出という事態の発生を確実に回避し得ることになる。以上により、潜熱回収用の二次熱交換器と、二次熱交換器で発生するドレン水を処理するための中和器とを設置して潜熱回収型に構成する上で、不都合発生のおそれを回避しつつ装置全体のコンパクト化を図り得る給湯装置を提供し得ることになる。 In the case of each of the above inventions, since the neutralization tank that occupies the main part of the neutralizer can be disposed outside the outer casing, the size of the outer casing, that is, the size of the hot water supply device, compared to the case where it is installed inside Can be reduced. In particular, by installing an exhaust seal part that is more compact than the neutralization tank part in an empty space such as the position of the bottom side of the outer casing, an extra outer casing is required for the entire vertical size of the conventional neutralizer. Compared with the increase in the vertical dimension, the vertical dimension of the outer casing can be greatly reduced. In addition, the neutralization tank part is integrated with the exhaust seal part by connection work at the installation site of the hot water supply device, and the neutralizer is completed. Since the seal portion is installed in advance in the outer casing, there is no possibility that the combustion exhaust gas leaks from the poorly connected portion, and the occurrence of the situation of leakage of the combustion exhaust gas can be reliably avoided. As described above, there is a risk of inconvenience in configuring a latent heat recovery type by installing a secondary heat exchanger for recovering latent heat and a neutralizer for treating drain water generated in the secondary heat exchanger. Therefore, it is possible to provide a hot water supply apparatus that can achieve the compactness of the entire apparatus while avoiding the above.

その上で、上記排気シール部の接続端部と、中和槽部の接続端部とが互いに接続されていることを検知する接続検知手段と、この接続検知手段からの接続検知信号の出力の有無を監視して上記バーナの燃焼作動を許可又は禁止する制御手段とを備えているため、上記の両接続端部が、万一、接続不良状態になっている場合には接続検知手段からの接続検知信号がなく燃焼作動を禁止させ得る一方、確実に接続されていれば接続検知信号の出力により燃焼作動が許可されることになる。これにより、排気シール部と中和槽部とを互いに切り離し、中和槽部を外装ケーシングの外部に配設して現場にての接続作業により中和器に一体化するようにしたとしても、二重のフェールセーフを担保し得ることになる。 On top of that, the connection end of the exhaust seal portion, and the connection detection means and the connection end of the neutralization tank unit detects that it is connected to each other, the output of the connection detecting signal from the connection detection means Control means for permitting or prohibiting the combustion operation of the burner by monitoring the presence or absence of the burner, so that in the unlikely event that both the connection end portions are in a poor connection state, the connection detection means While there is no connection detection signal, the combustion operation can be prohibited. On the other hand, if the connection is reliably established, the combustion operation is permitted by the output of the connection detection signal. Thereby, even if the exhaust seal part and the neutralization tank part are separated from each other, and the neutralization tank part is disposed outside the outer casing and integrated with the neutralizer by on-site connection work, Double fail-safety can be secured.

以上、説明したように、請求項１〜請求項４のいずれかの給湯装置によれば、中和器の主要部分を占める中和槽部を外装ケーシング外に配設することができ、内部に設置する場合に比して、外装ケーシングのサイズ、つまり給湯装置のサイズを小さくすることができるようになる。特に、従来の中和器全体の上下寸法だけ余分に外装ケーシングの必要上下寸法が増大していたのに比べ、外装ケーシングの上下寸法を大幅に小さくすることができるようになる。加えて、中和槽部を給湯装置の設置現場での接続作業によって排気シール部と一体化して中和器を完成させるようにした場合に、万一、接続不良等が生じたとしても、排気シール部を外装ケーシング内に予め設置させているため、燃焼排ガスがその接続不良箇所から漏出するおそれはなく、燃焼排ガスの漏出という事態の発生を確実に回避することができるようになる。以上により、潜熱回収用の二次熱交換器と、二次熱交換器で発生するドレン水を処理するための中和器とを設置して潜熱回収型に構成する上で、不都合発生のおそれを回避しつつ装置全体のコンパクト化を図ることができる給湯装置を提供することができるようになる。 As described above, according to the hot water supply device of any one of claims 1 to 4 , the neutralization tank portion that occupies the main part of the neutralizer can be disposed outside the outer casing, Compared to the installation, the size of the outer casing, that is, the size of the hot water supply device can be reduced. In particular, the vertical dimension of the outer casing can be greatly reduced as compared with the case where the required vertical dimension of the outer casing has been increased by an extra vertical dimension of the entire conventional neutralizer. In addition, if the neutralization tank is integrated with the exhaust seal part by connecting work at the installation site of the hot water supply device to complete the neutralizer, even if connection failure occurs, the exhaust Since the seal portion is installed in the exterior casing in advance, there is no possibility that the combustion exhaust gas leaks from the poorly connected portion, and the occurrence of the situation of leakage of the combustion exhaust gas can be reliably avoided. As described above, there is a risk of inconvenience in configuring a latent heat recovery type by installing a secondary heat exchanger for recovering latent heat and a neutralizer for treating drain water generated in the secondary heat exchanger. Thus, it is possible to provide a hot water supply apparatus that can reduce the size of the entire apparatus while avoiding the above.

その上で、接続検知手段と、監視制御を行う制御手段とを備えているため、上記の両接続端部が、万一、接続不良状態になっている場合には接続検知手段からの接続検知信号がなく燃焼作動を禁止することができる一方、確実に接続されていれば接続検知信号の出力により燃焼作動を許可することができるようになる。これにより、排気シール部と中和槽部とを互いに切り離し、中和槽部を外装ケーシングの外部に配設して現場にての接続作業により中和器に一体化するようにしたとしても、二重のフェールセーフを担保することができるようになる。
On top of that, due to the provision of a connection detecting means, and control means for monitoring and controlling both the connection ends of the above, any chance, the connection detection from the connection detecting means if it has been poor connection state While there is no signal and the combustion operation can be prohibited, the combustion operation can be permitted by the output of the connection detection signal if it is securely connected. Thereby, even if the exhaust seal part and the neutralization tank part are separated from each other, and the neutralization tank part is disposed outside the outer casing and integrated with the neutralizer by on-site connection work, Double fail-safety can be secured.

以下、本発明の実施形態を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

＜第１実施形態＞
図１は、本発明の第１実施形態に係る給湯装置を示す。この給湯装置は、一次熱交換器３において燃焼ガスからの顕熱回収に加え、二次熱交換器７において燃焼排ガスから潜熱の回収をも行うことにより高効率化を図る潜熱回収型に構成されている。なお、同図には逆燃式といわれる構造例を示しているが、必ずしも逆燃式でなくても本発明を適用し得る。又、図１には給湯機能のみの単機能タイプの給湯装置を示すが、これに限らず、給湯機能に加えて、温水循環式暖房機能、風呂追い焚き機能、風呂湯張り機能のいずれか１以上の機能を併有する複合熱源機型に構成されたものに本発明を適用することができる。又、低温水を入水させ、加熱後の高温水を暖房端末に供給（給湯）し、放熱後の低温水を再び入水させるというような温水循環式暖房装置として構成された給湯装置に本発明を適用することもできるし、浴槽水をポンプにより取り込んで入水させ、加熱後の湯を浴槽水に供給（給湯）するというように追い焚き循環させる風呂釜として構成された給湯装置に本発明を適用することもできる。 <First Embodiment>
FIG. 1 shows a hot water supply apparatus according to a first embodiment of the present invention. This hot water supply apparatus is configured as a latent heat recovery type that achieves high efficiency by recovering latent heat from combustion exhaust gas in the secondary heat exchanger 7 in addition to sensible heat recovery from the combustion gas in the primary heat exchanger 3. ing. In addition, although the structural example called reverse combustion type is shown in the same figure, this invention can be applied even if it is not necessarily reverse combustion type. FIG. 1 shows a single-function type hot water supply device having only a hot water supply function. However, the present invention is not limited to this, and in addition to the hot water supply function, any one of a hot water circulation heating function, a bath replenishment function, and a bath hot water filling function is provided. The present invention can be applied to a composite heat source machine having the above functions. Further, the present invention is applied to a hot water supply apparatus configured as a hot water circulation heating apparatus in which low temperature water is introduced, high temperature water after heating is supplied (hot water supply) to a heating terminal, and low temperature water after heat radiation is reentered. The present invention can be applied to a hot water supply apparatus configured as a bath tub that circulates and recirculates, such as taking in bathtub water by a pump and supplying the hot water to the bathtub water (hot water supply). You can also

図１の給湯装置は、バーナ２１を含む燃焼系２及び一次熱交換器３を内蔵した缶体４と、缶体４の下端開口に連通接続された排気集合筒５と、排気集合筒５の一端側と連通接続されて上向きに延びる排気管６と、上記の排気集合筒５の内部に配設された二次熱交換器７と、この二次熱交換器７で発生するドレン水を中和処理した上で排水する中和器８とを備えたものである。 The hot water supply apparatus of FIG. 1 includes a can body 4 including a combustion system 2 including a burner 21 and a primary heat exchanger 3, an exhaust collecting cylinder 5 connected in communication with a lower end opening of the can body 4, and an exhaust collecting cylinder 5. An exhaust pipe 6 that is connected to one end side and extends upward, a secondary heat exchanger 7 disposed inside the exhaust collecting cylinder 5, and drain water generated in the secondary heat exchanger 7 It is equipped with a neutralizer 8 that drains after the sum treatment.

上記排気集合筒５は、缶体４の下側位置において缶体４と一体に接合され、この状態で架台９１上に載置されて支持されている。架台９１の下側空間は後述の配管系や、制御手段を構成するコントローラ１０等の配設空間とされている。そして、中和器８を構成する排気シール部８ａと、中和槽部８ｂとの内、排気シール部８ａは外装ケーシング９内に設置される一方、中和槽部８ｂは外装ケーシング９外に設置されるようになっている。以下、各構成要素について詳細に説明する。 The exhaust collecting cylinder 5 is integrally joined to the can body 4 at a lower position of the can body 4 and is placed and supported on the gantry 91 in this state. A lower space of the gantry 91 is an arrangement space for a piping system, which will be described later, and the controller 10 constituting the control means. And among the exhaust seal part 8a and the neutralization tank part 8b which comprise the neutralizer 8, while the exhaust seal part 8a is installed in the exterior casing 9, the neutralization tank part 8b is outside the exterior casing 9 It is to be installed. Hereinafter, each component will be described in detail.

上記燃焼系２のバーナ２１は、缶体４内の上部において火炎を下向きに噴射するように配設されている。このバーナ２１は、ガス等の気化燃料や石油（灯油）等の液体燃料を燃焼させるものであるが、本実施形態では液体燃料の石油（灯油）を噴霧燃焼させるバーナを用いたものを示している。その他、静音タイプの気化式バーナを用いることができる。そして、図示省略の燃料供給管、燃料ポンプ及び送風ファン２２等を燃焼系２として備え、燃料ポンプの作動により燃料供給管を通して圧送供給された石油を噴霧させて送風ファン２２からの燃焼用空気と混合し、この混合気をバーナ２１の炎孔から下向きに噴出させて燃焼させるようになっている。 The burner 21 of the combustion system 2 is arranged so as to inject a flame downward at the upper part in the can 4. The burner 21 burns vaporized fuel such as gas and liquid fuel such as petroleum (kerosene). In the present embodiment, the burner 21 uses a burner that sprays and burns liquid fuel petroleum (kerosene). Yes. In addition, a silent type vaporizing burner can be used. Then, a fuel supply pipe, a fuel pump, and a blower fan 22 (not shown) are provided as the combustion system 2, and oil supplied by pressure through the fuel supply pipe is sprayed by the operation of the fuel pump to spray combustion air from the blower fan 22. The air-fuel mixture is mixed and jetted downward from the flame hole of the burner 21 to burn.

一次熱交換器３は、例えばフィンアンドチューブ形式に構成され、缶体４内の下部を横切るように配設されている。上記のバーナ２１と一次熱交換器３との両者間の缶体４の内部空間が燃焼室として構成され、この部位の缶体４の外壁面には一次熱交換器３への入水の導入管３１が巻き付けられた状態でロー付けされている。この一次熱交換器３は、バーナ２１からの燃焼ガスを受け、その顕熱との熱交換加熱により入水管１１からの入水を主として加熱し、加熱された後の湯を出湯管１２に出湯させるようになっている。この際、入水管１１からの入水は、一次熱交換器３に入水される前に、二次熱交換器７に先に通されるようになっており、この二次熱交換器７において燃焼排ガスからの潜熱回収により予熱された後に、入水接続管１３及び導入管３１を介して一次熱交換器３に入水されて主加熱されるようになっている。そして、所定温度まで加熱されて上記出湯管１２に出湯された湯が、接続口１２１に接続された給湯用の外部配管１４を通して台所や浴室等の給湯栓や浴槽への供給管などの所定の給湯箇所に給湯されるようになっている。なお、上記入水管１１には、接続口１１１に接続された水道管等の外部配管１５から水道水等が所定の給水圧で給水されるようになっている。 The primary heat exchanger 3 is configured, for example, in a fin-and-tube format, and is disposed so as to cross the lower portion in the can 4. An internal space of the can body 4 between the burner 21 and the primary heat exchanger 3 is configured as a combustion chamber, and an inlet pipe for water entering the primary heat exchanger 3 is formed on the outer wall surface of the can body 4 at this portion. 31 is wound in a wound state. The primary heat exchanger 3 receives the combustion gas from the burner 21, mainly heats the incoming water from the inlet pipe 11 by heat exchange heating with the sensible heat, and discharges the heated hot water to the outlet pipe 12. It is like that. At this time, the incoming water from the inlet pipe 11 is first passed through the secondary heat exchanger 7 before entering the primary heat exchanger 3, and the secondary heat exchanger 7 burns the water. After being preheated by recovering latent heat from the exhaust gas, the water is introduced into the primary heat exchanger 3 through the incoming water connection pipe 13 and the inlet pipe 31 and is mainly heated. Then, the hot water heated to the predetermined hot water pipe 12 after being heated to a predetermined temperature passes through an external hot water supply pipe 14 connected to the connection port 121, and is supplied with a predetermined pipe such as a hot water tap in a kitchen or a bathroom or a supply pipe to a bathtub. Hot water is supplied to hot water supply points. Note that tap water or the like is supplied to the water intake pipe 11 from an external pipe 15 such as a water pipe connected to the connection port 111 at a predetermined water supply pressure.

排気集合筒５は、一次熱交換器３を下向きに通過した後の燃焼排ガスを集合させ、続いて排気管６に流すことにより燃焼排ガスの流れを上向きにＵターンさせるようになっている。すなわち、バーナ２１の燃焼作動により下向きに噴射された燃焼ガスが燃焼室や燃焼ガスの流路を構成する缶体４内を上から下に向けて流され、一次熱交換器３を下向きに通過した後の燃焼排ガスが集合排気筒５に流入して二次熱交換器７と接触され、この二次熱交換器７を通過した後の燃焼排ガスが排気管６を通して排気筒６１から外装ケーシング９の外部に放出されることになる。 The exhaust collecting cylinder 5 collects the combustion exhaust gas after passing through the primary heat exchanger 3 downward, and then flows it to the exhaust pipe 6 to make the flow of the combustion exhaust gas U-turn upward. That is, the combustion gas injected downward by the combustion operation of the burner 21 flows from the top to the bottom in the can body 4 constituting the combustion chamber and the flow path of the combustion gas, and passes downward through the primary heat exchanger 3. Then, the exhaust gas after flowing into the collective exhaust pipe 5 is brought into contact with the secondary heat exchanger 7, and the exhaust gas after passing through the secondary heat exchanger 7 passes through the exhaust pipe 6 from the exhaust pipe 61 to the outer casing 9. Will be released to the outside.

排気管６は、上記排気集合筒５の一側上面に下流開口端が接合され、缶体４の側方空間において上向きに延びて上流端である排気筒６１において外装ケーシング９の外部に連通されている。この排気管６は吸音材６２等で外周が覆われており、燃焼排ガスの通過騒音を遮音・消音するようになっている。つまり、消音器としての機能・役割をも備えているのである。なお、気化式バーナのような静音タイプのものでは、排気管６内の吸音材６２等を省略することも可能である。 The exhaust pipe 6 has a downstream opening end joined to the upper surface of one side of the exhaust collecting cylinder 5 and extends upward in the side space of the can body 4 and communicates with the outside of the outer casing 9 in an exhaust cylinder 61 which is an upstream end. ing. The outer periphery of the exhaust pipe 6 is covered with a sound absorbing material 62 or the like, and the passage noise of the combustion exhaust gas is insulated and silenced. In other words, it also has a function and role as a silencer. In the case of a silent type such as a vaporizing burner, the sound absorbing material 62 and the like in the exhaust pipe 6 can be omitted.

二次熱交換器７は、例えば多管形式のものが排気集合筒５内に収容されて、一次熱交換器３を通過した後の燃焼排ガスと接触させてその潜熱回収により入水管１１からの入水を予熱するようになっている。そして、潜熱回収後に温度が低下した燃焼排ガスは排気管６を通して外部に放出されることになる。 As the secondary heat exchanger 7, for example, a multi-tube type is accommodated in the exhaust collecting cylinder 5 and brought into contact with the combustion exhaust gas after passing through the primary heat exchanger 3, and the latent heat recovery from the inlet pipe 11. Incoming water is preheated. Then, the combustion exhaust gas whose temperature has decreased after the latent heat recovery is discharged to the outside through the exhaust pipe 6.

中和器８は、図２にも示すように排気シール部８ａと、密閉容器として構成されて内部に例えば炭酸カルシウム等の中和剤Ｚが充填された中和槽部８ｂとの両者が接続されて組み付けられた状態で構成されるものである。排気シール部８ａは外装ケーシング９内の排気集合筒５よりも下側位置であって架台９１の側方位置に設置され、中和槽部８ｂは排気シール部８ａの下側位置であって外装ケーシング９の構成壁を挟んで外側位置に設置されるようになっている。 As shown in FIG. 2, the neutralizer 8 is connected to an exhaust seal portion 8a and a neutralization tank portion 8b that is configured as a sealed container and filled with a neutralizing agent Z such as calcium carbonate. It is configured in the assembled state. The exhaust seal portion 8a is located below the exhaust collecting cylinder 5 in the exterior casing 9 and at a side position of the gantry 91, and the neutralization tank portion 8b is located below the exhaust seal portion 8a. The casing 9 is installed at an outer position across the constituent wall.

排気シール部８ａは燃焼排ガスの漏出を阻止するために設けられたものである。要するに、排気シール部８ａは、内部にドレン水が満水状態にし得る例えばＵの字状の流路を中和器８ａの入口側に形成して水封シール部Ｗとなし、この水封シール部Ｗにより、燃焼排ガスの下流側への通過を阻止するようにしたものである。具体的には、本体容器８１の内部空間８２が上から下に垂下させた仕切り壁８３により底面側にのみ所定寸法の連通開口８２ａを残して左右に二分されている。仕切り壁８３を挟んだ一側の第１室８２ｂには、排気集合筒５の底面に連通接続させた導入管８４からドレン水が流入するようにされ、他側の第２室８２ｃには、越流開口８５を通して下方に延びる導出管部８６が連通されている。この導出管部８６の下端部に接続端部８６１が形成され、この接続端部８６１が外装ケーシング９の底壁面を貫通して突出又は下方に臨んで配設されている。そして、内部空間８２内のドレン水の水位が常に仕切り壁８３の下端面位置よりも上位に維持するようにされている。ドレン水の水位が越流開口８５の越流面位置を超えると、内部のドレン水が越流開口８５を越流して導出管部８６を通して中和槽部８ｂに流れ込むことになる。従って、仕切り壁８３の下端面位置から越流開口８５の越流面位置までの間のドレン水によって水封シール部Ｗが構成されることになる。 The exhaust seal portion 8a is provided to prevent leakage of combustion exhaust gas. In short, the exhaust seal portion 8a is formed as a water-sealed seal portion W by forming, for example, a U-shaped channel on the inlet side of the neutralizer 8a that can be filled with drain water, and this water-sealed seal portion. By W, passage of the combustion exhaust gas to the downstream side is prevented. Specifically, the internal space 82 of the main body container 81 is divided into left and right parts by leaving a communication opening 82a having a predetermined size only on the bottom surface side by a partition wall 83 suspended from above. Drain water flows into the first chamber 82b on one side across the partition wall 83 from the introduction pipe 84 connected to the bottom surface of the exhaust collecting cylinder 5, and the second chamber 82c on the other side A lead-out pipe portion 86 extending downward through the overflow opening 85 is communicated. A connection end portion 861 is formed at the lower end portion of the lead-out pipe portion 86, and the connection end portion 861 extends through the bottom wall surface of the outer casing 9 and faces downward. The drain water level in the internal space 82 is always maintained higher than the lower end surface position of the partition wall 83. When the water level of the drain water exceeds the overflow surface position of the overflow opening 85, the internal drain water flows over the overflow opening 85 and flows into the neutralization tank portion 8b through the outlet pipe portion 86. Therefore, the water seal part W is constituted by the drain water from the lower end surface position of the partition wall 83 to the overflow surface position of the overflow opening 85.

水封シール部Ｗの維持に関し、第２室８２ｃの上には補水口８７が設けられており、この補水口８７に接続された図示省略の導水管により自動補水されるようになっている。すなわち、上記導水管は途中に制御弁（図示省略）を介して入水管１１から延ばされ、又、内部空間８２内には水位検知手段としての低水位電極８８ａ及び高水位電極８８ｂが設けられており、コントローラ１０の補水制御により上記制御弁が自動開閉作動されて本体容器８１内の水位が常に水封シール部Ｗ範囲内を維持するように水が補給されるようになっている。例えば、給湯装置を設置して使用開始前や、使用後に凍結予防のために水抜きを実施した後に再使用する前には、排気シール部８ａ内は空にされているため、低水位電極８８ａにより現在水位が仕切り壁８３の下端面以下であることを検知して上記制御弁を開作動させて補水する一方、高水位電極８８ｂにより越流開口８５位置まで水位の上昇が検知されれば閉作動させて補水を停止させるようになっている。 Regarding the maintenance of the water seal part W, a water replenishing port 87 is provided on the second chamber 82c, and water is automatically replenished by a water conduit (not shown) connected to the water replenishing port 87. That is, the water guide pipe is extended from the water inlet pipe 11 through a control valve (not shown), and a low water level electrode 88a and a high water level electrode 88b are provided in the internal space 82 as water level detecting means. The control valve is automatically opened and closed by the water replenishment control of the controller 10, and water is replenished so that the water level in the main body container 81 is always maintained within the range of the water seal seal portion W. For example, the exhaust seal portion 8a is emptied before the use of the hot water supply device and before the start of use, or after reuse after draining water to prevent freezing, so the low water level electrode 88a. By detecting that the current water level is below the lower end surface of the partition wall 83 and opening the control valve to replenish water, the high water level electrode 88b closes if the rise of the water level is detected up to the position of the overflow opening 85. It is designed to stop rehydration.

又、中和槽部８ｂは、排気シール部８ａ側の接続端部８６１に接続される上端側の接続端部８９からドレン水が導入され、この導入されたドレン水が下端側の排水口９０まで流れる間に内部に充填された中和剤Ｚと接触して中和反応を起こすことにより中和処理が行われるように構成されている。この中和槽部８ｂは、給湯装置が壁掛け式として設置される場合には、外装ケーシング９の設置固定位置の下側に形成される給湯用や給水用の外部配管１４，１５の配管スペースに対し配設されることになる。中和槽部８ｂの支持は、上記の接続端部８６１に対する接続による吊り下げ支持の他に、適宜のブラケット等を介して外装ケーシング９の設置対象の壁面等に固定することにより行えばよい。 Further, the neutralization tank 8b is supplied with drain water from a connection end 89 on the upper end side connected to the connection end 861 on the exhaust seal portion 8a side, and the drain water thus introduced flows into the drain port 90 on the lower end side. The neutralization treatment is performed by bringing into contact with the neutralizing agent Z filled inside and causing a neutralization reaction. When the hot water supply apparatus is installed as a wall-mounted type, the neutralization tank portion 8b is provided in the piping space of the external pipes 14 and 15 for hot water supply or water supply formed below the installation fixing position of the outer casing 9. It will be arranged against. The neutralization tank portion 8b may be supported by being fixed to a wall surface or the like on which the outer casing 9 is to be installed via an appropriate bracket or the like in addition to the suspension support by connection to the connection end portion 861.

そして、上記の中和槽部８ｂ側の接続端部８９と、排気シール部８ａ側の接続端部８６１とには、互いに接続されることにより両者が接続されたことの検知信号をコントローラ１０に出力する接続検知手段１６が設けられ、この接続検知手段１６からの検知信号に基づいてコントローラ１０において監視制御が実行されるようになっている。この監視制御は、中和槽部８ｂの排気シール部８ａへの接続作業が現場作業になるため、中和槽部８ｂの接続が確実に行われていることを確認した上で給湯装置の使用（バーナ２１の燃焼作動）を許可し、未接続である場合には給湯装置の使用を禁止（燃焼作動の禁止）させるようにするものである。図２に例示する接続検知手段１６は接続されることにより電気的導通を得るように構成されており、排気シール８ａ側の接続端部８６１にはラインの途中を遮断した一対の端子１６１，１６１を設ける一方、中和槽部８ｂ側の接続端部８９には互いにライン接続した一対の端子１６２，１６２を設けたものである。そして、接続端部８９を接続端部８６１に接続すれば、中和槽部８ｂ側の端子１６２，１６２が排気シール部８ａ側の端子１６１，１６１に結合されて導通状態となり、コントローラ１０に接続検知信号が出力されるようになっている。 Then, the connection end 89 on the neutralization tank portion 8b side and the connection end portion 861 on the exhaust seal portion 8a side are connected to each other so that a detection signal indicating that both are connected to the controller 10. An output connection detection means 16 is provided, and monitoring control is executed in the controller 10 based on a detection signal from the connection detection means 16. In this monitoring control, since the connection work of the neutralization tank 8b to the exhaust seal part 8a is an on-site work, the use of the hot water supply device is confirmed after confirming that the neutralization tank 8b is securely connected. (Combustion operation of the burner 21) is permitted, and when it is not connected, the use of the hot water supply device is prohibited (combustion operation is prohibited). The connection detection means 16 illustrated in FIG. 2 is configured to obtain electrical continuity when connected, and a pair of terminals 161 and 161 that interrupt the middle of the line at the connection end 861 on the exhaust seal 8a side. On the other hand, the connection end 89 on the side of the neutralization tank 8b is provided with a pair of terminals 162 and 162 connected in line with each other. When the connection end 89 is connected to the connection end 861, the terminals 162 and 162 on the neutralization tank portion 8 b side are coupled to the terminals 161 and 161 on the exhaust seal portion 8 a side and become conductive and connected to the controller 10. A detection signal is output.

この接続検知手段１６を用いた監視制御は図３に示すように、給湯装置が設置されて使用開始されて電源投入されるか、運転スイッチがＯＮされかされることで開始され、まず、接続検知が有るか否かを判定する（ステップＳ１）。両接続端部８９，８６１が互いに接続されて接続検知信号が出力されていれば（ステップＳ１でＹＥＳ）、給湯制御部等の制御部に対し燃焼作動を許可する信号を出力した上で（ステップＳ２）、以後、コントローラ１０に備えられている通常の給湯制御等を続行させる。万一、接続検知信号の出力が無ければ（ステップＳ１でＮＯ）、給湯制御部等の制御部に対し燃焼作動を禁止する信号を出力した上で（ステップＳ３）、中和槽部８ｂの接続に異常があるため燃焼作動が強制的に禁止された旨の案内をユーザーに報知する処理を行う（ステップＳ４）。この報知処理は、リモコン１０ａ（図１参照）の表示部に文字情報により表示したり、あるいは、音声出力回路を通して音声案内により報知したりすればよい。警告灯の点滅や警告ブザーの吹鳴を組み合わせてももちろんよい。 As shown in FIG. 3, the monitoring control using the connection detecting means 16 is started when the hot water supply device is installed and started to use and turned on, or the operation switch is turned on. It is determined whether or not there is a detection (step S1). If both connection end portions 89 and 861 are connected to each other and a connection detection signal is output (YES in step S1), a signal permitting combustion operation is output to a control unit such as a hot water supply control unit (step S1). Thereafter, the normal hot water supply control provided in the controller 10 is continued. If no connection detection signal is output (NO in step S1), a signal prohibiting the combustion operation is output to a control unit such as a hot water supply control unit (step S3), and the neutralization tank unit 8b is connected. A process of notifying the user that the combustion operation has been forcibly prohibited due to the abnormality is performed (step S4). This notification processing may be performed by displaying text information on the display unit of the remote controller 10a (see FIG. 1) or by voice guidance through a voice output circuit. Of course, you may combine flashing warning lights and sounding warning buzzers.

以上の給湯装置の場合、二次熱交換器７では被加熱媒体として入水管１１から冷たい水が通水される一方、缶体４から燃焼排ガスが排気集合筒５内に流されるため、燃焼排ガスからの潜熱回収により入水が予熱される一方、その潜熱回収に伴いドレン水が発生する。このドレン水は排気集合筒５の底面を流れ、導入管８４を通して排気シール部８ａの第１室８２ｂに導入される。水位が越流開口８５の越流面位置を超えることにより、第１室８２ｂから連通開口８２ａを通して第２室８２ｃにＵの字状の流路に沿って流れ、越流開口８５から導出管部８６に流れ落ちて接続端部８６１，８９を通して中和槽部８ｂ内に流入することになる。そして、排水口９０までに至る比較的長い経路を流れる間にドレン水は中和剤Ｚと接触し、中和反応を引き起こして中和処理されることになる。 In the case of the hot water supply apparatus described above, in the secondary heat exchanger 7, cold water is passed from the inlet pipe 11 as a heating medium, while the combustion exhaust gas flows from the can 4 into the exhaust collecting cylinder 5. While the incoming water is preheated by the latent heat recovery from the water, drain water is generated along with the latent heat recovery. The drain water flows through the bottom surface of the exhaust collecting cylinder 5 and is introduced into the first chamber 82b of the exhaust seal portion 8a through the introduction pipe 84. When the water level exceeds the overflow surface position of the overflow opening 85, it flows along the U-shaped flow path from the first chamber 82b to the second chamber 82c through the communication opening 82a. It flows down to 86 and flows into the neutralization tank part 8b through the connection end parts 861 and 89. The drain water comes into contact with the neutralizing agent Z while flowing through a relatively long path leading to the drain port 90, causing a neutralization reaction to be neutralized.

そして、本実施形態では、中和器８の主要部分を占める中和槽部８ｂが外装ケーシング９の外に設置するようにしているため、外装ケーシング１０８（図６参照）内に設置する場合に比して、外装ケーシング９のサイズを小さくすることができる。特に、本実施形態の場合には、外装ケーシング９の必要上下寸法を大幅に小さくすることができることになる。又、中和槽部８ｂは給湯装置の設置現場での接続作業によって排気シール部８ａと一体化されて中和器８が完成することになるが、万一、接続不良等が生じたとしても、排気シール部８ａが外装ケーシング９内に設置されているため、燃焼排ガスがその接続不良箇所から漏出するおそれはなく、燃焼排ガスの漏出という事態の発生を確実に回避することができる。しかも、接続不良状態になっている場合には接続検知手段１６を用いたコントローラ１０による監視制御によって燃焼作動を禁止させることができ、二重のフェールセーフを担保することができる。その上に、中和槽部８ｂは外部配管１４，１５の設置スペースの空きスペースを活用して配設することができるため、外装ケーシング９外に特別な設置スペースを用意する必要もない。 And in this embodiment, since the neutralization tank part 8b which occupies the principal part of the neutralizer 8 is installed outside the exterior casing 9, when installing in the exterior casing 108 (refer FIG. 6), In comparison, the size of the outer casing 9 can be reduced. In particular, in the case of this embodiment, the required vertical dimension of the outer casing 9 can be greatly reduced. Further, the neutralization tank portion 8b is integrated with the exhaust seal portion 8a by connection work at the installation site of the hot water supply apparatus to complete the neutralizer 8, but even if a connection failure or the like occurs, Since the exhaust seal portion 8a is installed in the outer casing 9, there is no fear that the combustion exhaust gas leaks from the poorly connected portion, and the occurrence of the situation of leakage of the combustion exhaust gas can be reliably avoided. In addition, when the connection is in a poor state, the combustion operation can be prohibited by monitoring control by the controller 10 using the connection detection means 16, and double fail-safe can be ensured. In addition, since the neutralization tank portion 8b can be arranged by utilizing the empty space of the installation space of the external pipes 14 and 15, it is not necessary to prepare a special installation space outside the outer casing 9.

＜第２実施形態＞
図４は、本発明の第２実施形態に係る給湯装置を示す。第２実施形態は、二次熱交換器７ａを、缶体４の上側位置であって外装ケーシング９ａの最頂部位置に配設して、排気管６の下流端から燃焼排ガスの供給を受けるようにしたものである。従って、排気シール部８ａへのドレン水の導入管８４も、二次熱交換器７ａの熱交換器ケース７１の底面から延びるように配設されている。なお、第２実施形態のその他の構成要素は、中和器８を構成する排気シール部８ａや中和槽部８ｂ（図２）を含め第１実施形態のものと同様構成であるため、同一構成要素には同一符号を付してその詳細な説明は省略することとする。 Second Embodiment
FIG. 4 shows a hot water supply apparatus according to the second embodiment of the present invention. In the second embodiment, the secondary heat exchanger 7a is disposed at the uppermost position of the outer casing 9a on the upper side of the can body 4 so that the combustion exhaust gas is supplied from the downstream end of the exhaust pipe 6. It is a thing. Therefore, the drain water introduction pipe 84 to the exhaust seal portion 8a is also arranged so as to extend from the bottom surface of the heat exchanger case 71 of the secondary heat exchanger 7a. The other components of the second embodiment are the same as those of the first embodiment, including the exhaust seal portion 8a and the neutralization tank portion 8b (FIG. 2) constituting the neutralizer 8, and are the same. Components will be assigned the same reference numerals and detailed description thereof will be omitted.

第２実施形態の二次熱交換器７ａは、例えば多管形式のものが熱交換器ケース７１内に収容されて構成されている。熱交換器ケース７１はその一端で排気管６の下流端(上端開口)に連通され、排気管６から供給されてくる燃焼排ガスを二次熱交換器７ａと接触させてその潜熱回収により入水管１１からの入水を予熱し、潜熱回収後に温度が低下した燃焼排ガスを排気筒７２を通して外部に放出するようになっている。 The secondary heat exchanger 7a of the second embodiment is configured such that, for example, a multi-tube type is accommodated in a heat exchanger case 71. One end of the heat exchanger case 71 is communicated with the downstream end (upper end opening) of the exhaust pipe 6, and the flue gas supplied from the exhaust pipe 6 is brought into contact with the secondary heat exchanger 7 a, and the water intake pipe is obtained by collecting the latent heat. 11 is preheated, and the flue gas whose temperature has decreased after the recovery of latent heat is discharged to the outside through the exhaust pipe 72.

この第２実施形態の場合、排気集合筒５ａとして、第１実施形態の如く二次熱交換器７を内蔵させない分だけ上下方向の厚みを小さくできる代わりに、缶体４の上側位置に二次熱交換器７ａの設置スペースが必要となるものの、図６の場合と比べると、中和槽部８ｂが外装ケーシング９ａの外に設置されているため、図６の外装ケーシング１０８よりも外装ケーシング９ａの上下方向寸法を小さくすることができる。加えて、それ以外の作用効果として、第１実施形態の場合と同様に得ることができる。 In the case of this second embodiment, as the exhaust collecting cylinder 5a, the thickness in the vertical direction can be reduced by the amount not including the secondary heat exchanger 7 as in the first embodiment. Although an installation space for the heat exchanger 7a is required, the neutralization tank portion 8b is installed outside the outer casing 9a as compared with the case of FIG. 6, and therefore the outer casing 9a is more than the outer casing 108 of FIG. The vertical dimension of can be reduced. In addition, other operational effects can be obtained as in the case of the first embodiment.

＜第３実施形態＞
図５は、本発明の第３実施形態に係る給湯装置を示す。第３実施形態は、二次熱交換器７ｂを、缶体４の側方位置の排気管６ａ内に配設して、排気集合筒５ａから燃焼排ガスの供給を受けるようにしたものである。従って、排気シール部８ａへのドレン水の導入管８４は、二次熱交換器７ｂが配設された排気管６ａの底面から延びるように配設され、その排気シール部８ａも排気管６ａの下方位置であって排気集合筒５ａの下側位置に配設され、中和槽部８ｂもその排気シール部８ａの移動に伴い外装ケーシング９ｂの左端側の下方位置に配設されることになる。なお、第３実施形態のその他の構成要素は、中和器８を構成する排気シール部８ａや中和槽部８ｂ（図２）を含め第１実施形態のものと同様構成であるため、同一構成要素には同一符号を付してその詳細な説明は省略することとする。 <Third Embodiment>
FIG. 5 shows a hot water supply apparatus according to a third embodiment of the present invention. In the third embodiment, the secondary heat exchanger 7b is disposed in the exhaust pipe 6a at a side position of the can body 4 so that the combustion exhaust gas is supplied from the exhaust collecting cylinder 5a. Therefore, the drain water introduction pipe 84 to the exhaust seal portion 8a is disposed so as to extend from the bottom surface of the exhaust pipe 6a in which the secondary heat exchanger 7b is disposed, and the exhaust seal portion 8a is also connected to the exhaust pipe 6a. The neutralization tank portion 8b is disposed at a lower position on the left end side of the outer casing 9b as the exhaust seal portion 8a moves. . The other components of the third embodiment are the same as those of the first embodiment, including the exhaust seal portion 8a and the neutralization tank portion 8b (FIG. 2) constituting the neutralizer 8, and are the same. Components will be assigned the same reference numerals and detailed description thereof will be omitted.

第３実施形態の二次熱交換器７ｂは、例えば多管形式のものが排気管６ａ内に収容されて構成されている。二次熱交換器７ｂは排気管６の下流側（図５の上側）に入水管１１の下流端が接続される入口ヘッダー７３が配設され、排気管６ｂの上流側（図５の下側）に入水接続管１３の上流端が接続される出口ヘッダー７４が配設されている。そして、排気集合筒５ａから流入した燃焼排ガスが二次熱交換器７ｂと接触しその潜熱回収により入水管１１からの入水を予熱し、潜熱回収後に温度が低下した燃焼排ガスを排気管６ａの下流端の排気筒６１を通して外部に放出するようになっている。 The secondary heat exchanger 7b of the third embodiment is configured such that, for example, a multi-tube type is accommodated in the exhaust pipe 6a. The secondary heat exchanger 7b is provided with an inlet header 73 connected to the downstream end of the inlet pipe 11 on the downstream side (upper side in FIG. 5) of the exhaust pipe 6, and on the upstream side (lower side in FIG. 5) of the exhaust pipe 6b. ) Is provided with an outlet header 74 to which the upstream end of the water inlet connecting pipe 13 is connected. Then, the flue gas flowing in from the exhaust collecting cylinder 5a comes into contact with the secondary heat exchanger 7b and preheats the water from the water intake pipe 11 by recovering its latent heat. The gas is discharged to the outside through the exhaust pipe 61 at the end.

この第３実施形態の場合、排気集合筒５ａとして、第１実施形態の如く二次熱交換器７を内蔵させない分だけ上下方向の厚みを小さくでき、第１実施形態の場合よりも外装ケーシング９ｂの上下方向寸法を小さくすることができる。加えて、他の作用効果として、第１実施形態の場合と同様のものを得ることができる。 In the case of this third embodiment, as the exhaust collecting cylinder 5a, the thickness in the vertical direction can be reduced by the amount not incorporating the secondary heat exchanger 7 as in the first embodiment, and the outer casing 9b is smaller than in the case of the first embodiment. The vertical dimension of can be reduced. In addition, as other operational effects, the same effects as those of the first embodiment can be obtained.

＜他の実施形態＞
なお、本発明は上記第１〜第３実施形態に限定されるものではなく、その他種々の実施形態を包含するものである。すなわち、上記各実施形態では、排気シール部８ａに対し中和槽部８ｂを直に接続したものを示したが、これに限らず、排気シール部８ａに対し例えば延長ホース等の延長接続管を介して中和槽部８ｂを連通接続させるようにしてもよい。 <Other embodiments>
In addition, this invention is not limited to the said 1st-3rd embodiment, Other various embodiments are included. That is, in each said embodiment, what showed the neutralization tank part 8b directly connected with respect to the exhaust seal part 8a was shown, However, Not only this but extension connection pipes, such as an extension hose, are connected with respect to the exhaust seal part 8a. Alternatively, the neutralization tank 8b may be connected in communication.

又、各実施形態において、中和槽部８ｂとしては、例えば合成樹脂成形したタンクにより構成する他、硬質樹脂製のパイプを利用して構成してもよいし、あるいは、軟質樹脂製のホースを利用して形成するようにしてもよい。 Moreover, in each embodiment, as the neutralization tank part 8b, for example, a synthetic resin molded tank may be used, a hard resin pipe may be used, or a soft resin hose may be used. You may make it form using.

本発明の第１実施形態の給湯装置を示す説明図である。It is explanatory drawing which shows the hot water supply apparatus of 1st Embodiment of this invention. 排気シール部と中和槽部との拡大説明図である。It is expansion explanatory drawing of an exhaust seal part and a neutralization tank part. 監視制御に係るフローチャートである。It is a flowchart which concerns on monitoring control. 第２実施形態の給湯装置を示す図１対応図である。It is a FIG. 1 corresponding view which shows the hot water supply apparatus of 2nd Embodiment. 第３実施形態の給湯装置を示す図１対応図である。It is a FIG. 1 corresponding view which shows the hot water supply apparatus of 3rd Embodiment. 従来の給湯装置を示す説明図である。It is explanatory drawing which shows the conventional hot-water supply apparatus.

Explanation of symbols

３一次熱交換器
５，５ａ排気集合筒
６，６ａ排気管
７，７ａ，７ｂ二次熱交換器
８中和器
８ａ排気シール部
８ｂ中和槽部
９，９ａ，９ｂ外装ケーシング
１０コントローラ（制御手段）
１６接続検知手段
２１バーナ
８６導出管部
８９，８６１接続端部 3 Primary heat exchangers 5, 5a Exhaust collecting cylinders 6, 6a Exhaust pipes 7, 7a, 7b Secondary heat exchanger 8 Neutralizer 8a Exhaust seal part 8b Neutralization tank parts 9, 9a, 9b Exterior casing 10 Controller (control) means)
16 Connection detection means 21 Burner 86 Lead pipe parts 89 and 861 Connection end part

Claims

Burner that burns fuel to generate combustion gas, primary heat exchanger that recovers sensible heat from combustion gas generated by combustion of this burner, and recovers latent heat from combustion exhaust gas after passing through this primary heat exchanger A hot water supply device comprising a secondary heat exchanger, a neutralizer for neutralizing the drain water generated in the secondary heat exchanger, and an outer casing,
The neutralizer includes a neutralization tank section for neutralizing drain water, and a drain in a state in which inflow of combustion exhaust gas from the secondary heat exchanger is blocked by a water seal at the inlet side of the neutralization tank section. And an exhaust seal portion for introducing water,
The exhaust seal portion is installed in advance in the outer casing, and a drain water discharge pipe portion is extended downward and includes a connection end portion at a lower end portion thereof.
The neutralization tank portion is disposed outside the outer casing, and is connected to the connecting end portion of the exhaust seal portion so as to penetrate the outer casing into and out of the outer casing and to connect to each other. It has a connection end that can be connected in communication,
Further, a connection detection means for detecting that the connection end of the exhaust seal portion, and a connection end of the neutralization tank portion are connected to each other,
The presence or absence of an output of the connection detection signal from the connection detecting means monitors that have a control means for permitting or prohibiting the combustion operation of the burner,
Hot water supply device, characterized in that.

A burner that burns fuel downward to generate combustion gas, a primary heat exchanger that is disposed below the burner and recovers sensible heat from the combustion gas generated by the combustion, and the primary heat exchanger An exhaust collecting cylinder that collects the flue gas after passing downward, a secondary heat exchanger that is disposed in the exhaust collecting pipe and recovers latent heat from the flue gas, and extends upward from the exhaust collecting cylinder Hot water supply comprising an exhaust pipe for exhausting combustion exhaust gas after passing through the secondary heat exchanger, a neutralizer for neutralizing the drain water generated in the secondary heat exchanger, and an outer casing A device,
The neutralizer includes a neutralization tank section for neutralizing drain water, and a drain in a state in which inflow of combustion exhaust gas from the secondary heat exchanger is blocked by a water seal at the inlet side of the neutralization tank section. And an exhaust seal portion for introducing water,
The exhaust seal portion is installed in advance in the outer casing, and a drain water discharge pipe portion is extended downward and includes a connection end portion at a lower end portion thereof.
The neutralization tank portion is disposed outside the outer casing, and is connected to the connecting end portion of the exhaust seal portion so as to penetrate the outer casing into and out of the outer casing and to connect to each other. It has a connection end that can be connected in communication,
Further, a connection detection means for detecting that the connection end of the exhaust seal portion, and a connection end of the neutralization tank portion are connected to each other,
The presence or absence of an output of the connection detection signal from the connection detecting means monitors that have a control means for permitting or prohibiting the combustion operation of the burner,
Hot water supply device, characterized in that.

A burner that burns fuel downward to generate combustion gas, a primary heat exchanger that is disposed below the burner and recovers sensible heat from the combustion gas generated by the combustion, and the primary heat exchanger An exhaust collecting cylinder that collects the combustion exhaust gas after passing downward, an exhaust pipe that communicates with the exhaust collecting cylinder and extends upward from the exhaust collecting cylinder and discharges the combustion exhaust gas, and is disposed inside the exhaust pipe. A secondary heat exchanger that recovers latent heat from the flue gas supplied into the exhaust pipe, a neutralizer that conducts neutralization treatment by introducing drain water generated in the secondary heat exchanger, and an outer casing are provided. A water heater,
The neutralizer includes a neutralization tank section for neutralizing drain water, and a drain in a state in which inflow of combustion exhaust gas from the secondary heat exchanger is blocked by a water seal at the inlet side of the neutralization tank section. And an exhaust seal portion for introducing water,
The exhaust seal portion is installed in advance in the outer casing, and a drain water discharge pipe portion is extended downward and includes a connection end portion at a lower end portion thereof.
The neutralization tank portion is disposed outside the outer casing, and is connected to the connecting end portion of the exhaust seal portion so as to penetrate the outer casing into and out of the outer casing and to connect to each other. It has a connection end that can be connected in communication,
Further, a connection detection means for detecting that the connection end of the exhaust seal portion, and a connection end of the neutralization tank portion are connected to each other,
The presence or absence of an output of the connection detection signal from the connection detecting means monitors that have a control means for permitting or prohibiting the combustion operation of the burner,
Hot water supply device, characterized in that.

A burner that burns fuel downward to generate combustion gas, a primary heat exchanger that is disposed below the burner and recovers sensible heat from the combustion gas generated by the combustion, and the primary heat exchanger An exhaust collecting cylinder for collecting the combustion exhaust gas after passing downward; an exhaust pipe communicating with the exhaust collecting cylinder and extending upward from the exhaust collecting cylinder; and an upper end side position of the exhaust pipe at an upper position of the burner. A secondary heat exchanger arranged to receive supply of combustion exhaust gas from the exhaust pipe and recovering latent heat; a neutralizer that conducts neutralization treatment by introducing drain water generated in the secondary heat exchanger; and an outer casing A water heater with
The neutralizer includes a neutralization tank section for neutralizing drain water, and a drain in a state in which inflow of combustion exhaust gas from the secondary heat exchanger is blocked by a water seal at the inlet side of the neutralization tank section. And an exhaust seal portion for introducing water,
The exhaust seal portion is installed in advance in the outer casing, and a drain water discharge pipe portion is extended downward and includes a connection end portion at a lower end portion thereof.
The neutralization tank portion is disposed outside the outer casing, and is connected to the connecting end portion of the exhaust seal portion so as to penetrate the outer casing into and out of the outer casing and to connect to each other. It has a connection end that can be connected in communication,
Further, a connection detection means for detecting that the connection end of the exhaust seal portion, and a connection end of the neutralization tank portion are connected to each other,
The presence or absence of an output of the connection detection signal from the connection detecting means monitors that have a control means for permitting or prohibiting the combustion operation of the burner,
Hot water supply device, characterized in that.