JP6732672B2 - Hot water heating system - Google Patents

Hot water heating system Download PDF

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JP6732672B2
JP6732672B2 JP2017018893A JP2017018893A JP6732672B2 JP 6732672 B2 JP6732672 B2 JP 6732672B2 JP 2017018893 A JP2017018893 A JP 2017018893A JP 2017018893 A JP2017018893 A JP 2017018893A JP 6732672 B2 JP6732672 B2 JP 6732672B2
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寿久 斉藤
寿久 斉藤
隆一 冨永
隆一 冨永
健太郎 山岡
健太郎 山岡
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株式会社ガスター
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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Description

本発明は、浴槽の残り湯を利用して暖房する浴湯熱暖房システムに関する。 TECHNICAL FIELD The present invention relates to a bath hot water heating system for heating by using remaining hot water in a bath tub.

近年の住宅には２４時間換気システムが設置されている。その代表的な構成は、図１４に示すように、たとえば、風呂場の天井裏等に換気ファン１０１を設け、この換気ファン１０１の吸込口１０２をトイレや洗面所、浴室などの天井（家の中心付近）に配置し、屋外に面する各居室の壁に給気口１０３を設け、換気ファン１０１の排気はダクトを通じて玄関先等に設けた排気口１０４から屋外に排出する、といった構成になっている。これは、排気はファンで行い、給気はファンを使用せずに自然に取込む方式（排気型）であり、一般の住宅で多く採用されている。 Recent homes have 24-hour ventilation systems. As shown in FIG. 14, a typical configuration thereof is, for example, a ventilation fan 101 provided in the ceiling of a bathroom or the like, and a suction port 102 of the ventilation fan 101 is used for a ceiling of a toilet, washroom, bathroom, etc. It is arranged near the center), and an air supply port 103 is provided on the wall of each room facing the outside, and exhaust air of the ventilation fan 101 is exhausted to the outside through an exhaust port 104 provided at the entrance or the like through a duct. ing. This is a method in which exhaust is performed by a fan and air is naturally taken in without using a fan (exhaust type), and is often used in ordinary houses.

冬場は給気口から冷たい外気が室内に入って来る。図１４の住宅では、リビングなど人が長く居る部屋は暖房されて暖かい。その暖かい空気は、住宅の中心の吸込口に向かってゆっくりと流れ、吸込口から吸い込まれて屋外に排出される。一方、洋室（１）、洋室（２）などは、寝室などに利用された場合、暖房費節約等の観点から、暖房されない場合が多い。また、リビングから暖かい空気も流れ込まないため、室温が低い。明け方になるとトイレなども冷えてしまう。そのため、たとえば、入浴後にそれらの部屋に入ったり、明け方に布団から出てトイレに行ったりすると、ヒートショックを受ける恐れがある。 In the winter, cold outside air enters the room through the air supply port. In the house shown in FIG. 14, a room such as a living room where people live for a long time is heated and warm. The warm air slowly flows toward the air inlet in the center of the house, is sucked in through the air outlet, and is discharged outdoors. On the other hand, the Western-style room (1), the Western-style room (2) and the like are often not heated from the viewpoint of saving heating costs when used in a bedroom or the like. Also, room temperature is low because warm air does not flow from the living room. At dawn, the toilets will also be cold. Therefore, for example, if you enter those rooms after taking a bath, or leave the futon at dawn and go to the bathroom, you may get a heat shock.

光熱費を抑えて、ヒートショックが防止される程度に暖房する方法として、風呂の残り湯が持つ熱量を利用する方法がある。たとえば、特許文献１には、浴槽内の湯を、ファンからの送風を受ける熱交換器に循環させる暖房システムが開示される。 There is a method of using the amount of heat of the remaining hot water in the bath as a method of controlling the heating and heating costs to the extent that heat shock is prevented, while suppressing the utility bill. For example, Patent Document 1 discloses a heating system in which hot water in a bathtub is circulated through a heat exchanger that receives air blown from a fan.

しかし、この暖房システムでは、室温と浴槽内の残り湯との温度差が少ないため、放熱効率が低く、要求される熱量を得るには大型の熱交換器が必要であった。 However, in this heating system, since the temperature difference between the room temperature and the remaining hot water in the bathtub is small, the heat radiation efficiency is low, and a large heat exchanger is required to obtain the required amount of heat.

暖房効率を高める技術として、下記特許文献２に、近接対向配置された２枚のパネル状の放熱器に温水を流し、その２枚のパネルの間に屋外からの空気を通して室内に導入する空調装置が開示される。 As a technique for improving heating efficiency, the following Patent Document 2 discloses an air conditioner in which hot water is caused to flow through two panel-shaped radiators arranged close to each other, and air from outside is introduced between the two panels into the room. Is disclosed.

また、下記特許文献３には、お湯を出湯する給湯機能、風呂に湯張りする注湯機能、風呂を追い焚きしたりする追い焚き機能などに加えて、暖房用放熱器や浴室乾燥機などに高温の湯（たとえば８０℃）を循環させる高温暖房機能、床暖房用の温水マットに低温の湯（たとえば、６０℃）の湯を循環させる低温暖房機能を備えた風呂暖房給湯器において、風呂の残り湯の熱を、翌日の明け方までの夜間に、床暖房用の温水マットを循環する循環水に与えて、緩やかに長時間暖房する技術が開示されている。この風呂暖房給湯器では、水―水熱交換器を利用して風呂の残り湯と温水マットを循環する液体との間の熱交換を行うと共に、循環ポンプをオンオフさせて、該熱交換を、夜間に、断続的に複数回行うようにし、風呂の残り湯による緩やかな暖房を明け方まで維持するように制御する。 In addition, in Patent Document 3 below, in addition to a hot water supply function for discharging hot water, a pouring function for filling a bath, a reheating function for reheating the bath, a radiator for heating, a bathroom dryer, etc. A bath heating water heater having a high-temperature heating function for circulating high-temperature hot water (for example, 80° C.) and a low-temperature heating function for circulating low-temperature hot water (for example, 60° C.) in a warm water mat for floor heating A technique is disclosed in which the heat of the remaining hot water is given to circulating water that circulates through a warm water mat for floor heating at night until the dawn of the next day to gently heat for a long time. In this bath heating water heater, heat is exchanged between the hot water remaining in the bath and the liquid circulating in the hot water mat by using a water-water heat exchanger, and the circulation pump is turned on and off to exchange the heat. It is controlled so that it is intermittently performed multiple times at night, and mild heating by the remaining hot water in the bath is maintained until dawn.

特開２０００−２８３５５８号公報JP 2000-283558A 特開２００９−９２３１０号公報JP, 2009-92310, A 特開２０１１−０８５２９６号公報JP, 2011-085296, A

特許文献２、３に開示の技術を応用して、２４時間換気システムの給気口に、風呂の残り湯を循環させる放熱器を取り付け、屋外からの冷たい空気を暖めてから室内に導入する暖房システムが考えられる。 By applying the technology disclosed in Patent Documents 2 and 3, a radiator that circulates the remaining hot water in the bath is attached to the air supply port of the 24-hour ventilation system, and warming the cold air from the outside before introducing it into the room System is conceivable.

しかし、この暖房システムにおいて、明け方まで長時間にわたって暖房を維持するために、特許文献３に開示されているように循環ポンプをオンオフさせて残り湯の循環を断続的に行うと、給気口から室内に流入する空気の温度が循環ポンプのオンオフに直結して変化するため、給気口近くの室内に居る人に不快感を与えてしまう。すなわち、特許文献３のように熱容量の大きい床暖房の場合は、蓄熱されるため、循環ポンプのオンオフにより断続的に暖房を行っても使用者に不快感を与えることはない。しかし、給気口に放熱器を取り付ける暖房方法では、蓄熱部分がないため、循環ポンプをオンオフさせて断続的に暖房すると、循環ポンプのオンオフが給気口から流入する空気の温度の変化に直結してしまい、給気口近くの室内に居る人に不快感を与えてしまう。 However, in this heating system, in order to maintain the heating for a long time until dawn, when the circulation pump is turned on and off to circulate the remaining hot water intermittently, as disclosed in Patent Document 3, from the air supply port. Since the temperature of the air flowing into the room is directly connected to the on/off state of the circulation pump and changes, it gives an unpleasant feeling to the person in the room near the air supply port. That is, in the case of floor heating having a large heat capacity as in Patent Document 3, since heat is stored, even if heating is intermittently performed by turning on/off the circulation pump, the user does not feel uncomfortable. However, in the heating method in which a radiator is attached to the air supply port, there is no heat storage part.Therefore, if the circulation pump is turned on and off to heat intermittently, the on/off state of the circulation pump is directly linked to the temperature change of the air flowing in from the air supply port. This causes discomfort to the person in the room near the air supply port.

本発明は、上記の問題を解決しようとするものであり、外気を室内に取り入れる給気口に取り付けた放熱器に風呂の残り湯を循環させて行う暖房動作を、給気口近くの室内に居る人においても快適となるように、長時間継続することのできる浴湯熱暖房システムを提供することを目的としている。 The present invention is intended to solve the above-mentioned problem, and performs heating operation by circulating the remaining hot water in the bath in a radiator attached to the air inlet for taking in outside air into the room near the air inlet. It is an object of the present invention to provide a bath water heating and heating system that can be continued for a long time so that even people who are present can feel comfortable.

かかる目的を達成するための本発明の要旨とするところは、次の各項の発明に存する。 The gist of the present invention for achieving such an object resides in the inventions of the following items.

［１］排気は別途ファンで行い、壁に設けられた屋外と屋内を繋ぐ貫通穴状の給気口からファンを使用せずに給気する２４時間換気システムの前記給気口の中に取り付けられる放熱器と、
浴槽から前記放熱器を経由して前記浴槽に戻る浴湯熱暖房経路と、
前記浴槽内の浴槽水を前記浴湯熱暖房経路に循環させる循環ポンプと、
制御部と
を有し、
前記制御部は、浴槽水の残熱を利用した暖房運転中は前記循環ポンプを連続動作させ、単位時間当たりの放熱量は、前記循環ポンプの流量で制御すると共に、暖房動作中の前記循環ポンプの流量を、風呂の追い焚き動作での流量に比べて低流量に制御する
ことを特徴とする浴湯熱暖房システム。 [1] exhaust separately performed by fans, mounted in the air supply port 24-hour ventilation system for air supply from the through hole-shaped air inlets connecting outdoor and indoor in the wall without the need of a fan Heatsink,
A bath water heating and heating path that returns from the bathtub to the bathtub via the radiator,
A circulation pump that circulates bath water in the bath in the bath heating and heating path,
With a control unit,
The control unit continuously operates the circulation pump during a heating operation using the residual heat of the bath water, and controls the heat radiation amount per unit time by the flow rate of the circulation pump, and the circulation pump during the heating operation. The bath hot water heating system is characterized in that the flow rate of the bath is controlled to be lower than the flow rate in the reheating operation of the bath .

上記発明では、循環ポンプは断続運転せずに連続的に動作させ、放熱器からの単位時間当たりの放熱量は、循環ポンプの流量を増減させて制御する。すなわち、長時間の暖房を、循環ポンプを低流量で連続稼動させて行う。 In the above invention, the circulation pump is continuously operated without intermittent operation, and the amount of heat radiation from the radiator per unit time is controlled by increasing or decreasing the flow rate of the circulation pump. That is, heating for a long time is performed by continuously operating the circulation pump at a low flow rate.

［２］前記制御部は、前記浴槽水の温度が高いほど、前記循環ポンプの流量を少なくする
ことを特徴とする［１］に記載の浴湯熱暖房システム。 [2] The hot water bath heating system according to [1], wherein the controller reduces the flow rate of the circulation pump as the temperature of the bath water rises.

［３］前記制御部は、前記浴槽水の温度と外気温の差が大きいほど、前記循環ポンプの流量を少なくする
ことを特徴とする［１］に記載の浴湯熱暖房システム。 [3] The bath water heating and heating system according to [1], wherein the control unit reduces the flow rate of the circulation pump as the difference between the temperature of the bath water and the outside air temperature increases.

［４］前記制御部は、前記浴槽水の保有する熱量で所定時間の暖房を継続する場合に、第１流量で前記循環ポンプを連動動作させると浴槽水の保有する熱量が不足する場合は、前記第１流量より少ない第２流量で前記循環ポンプを連動動作させる
ことを特徴とする［１］に記載の浴湯熱暖房システム。 [4] When the control unit operates the circulation pump in conjunction with the first flow rate to continue heating with the heat quantity of the bath water held for a predetermined time, when the heat quantity of the bath water held is insufficient, The bath hot water heating system according to [1], wherein the circulation pump is operated in conjunction with a second flow rate that is smaller than the first flow rate.

上記発明では、暖房運転を所定時間継続できるように流量が制御される。 In the above invention, the flow rate is controlled so that the heating operation can be continued for a predetermined time.

［５］前記制御部は、前記循環ポンプの送出流量を一時的に高めて浴槽内の浴槽水を撹拌する撹拌工程を暖房運転途中で１または複数回実行する
ことを特徴とする［１］乃至［４］のいずれか１つに記載の浴湯熱暖房システム。 [5] The control unit executes the stirring step of temporarily increasing the delivery flow rate of the circulation pump to stir the bath water in the bath, one or more times during the heating operation [1] to The hot water bath heating system according to any one of [4].

上記発明では、放熱器を経由して浴槽に戻ってきた冷たい湯は浴槽の下に溜まって温度成層を形成するので、浴槽水取込口の高さまで冷たい水の層が来ると、それより上の暖かい湯を暖房に利用できなくなる。そこで、撹拌工程を行って浴槽内の浴槽水の温度を均一化する。
［６］前記制御部は、前記撹拌工程の完了時に測定した浴槽水温度に基づいて前記循環ポンプの流量を決定し、その流量で次回の撹拌工程まで前記循環ポンプを連続動作させる
ことを特徴とする［５］に記載の浴湯熱暖房システム。 In the above invention, the cold water returning to the bathtub via the radiator accumulates under the bathtub to form a temperature stratification, so if the cold water layer reaches the height of the bathtub water intake, it will rise above it. Warm hot water cannot be used for heating. Therefore, a stirring process is performed to make the temperature of the bath water in the bath uniform.
[6] The control unit determines the flow rate of the circulation pump based on the bath water temperature measured at the completion of the stirring step, and continuously operates the circulation pump at the flow rate until the next stirring step.
The hot water bath heating system according to [5], characterized in that

［７］前記浴湯熱暖房経路を、前記放熱器を経由する第１経路とするか、前記放熱器をバイパスした第２経路とするかを切り換える経路変更部を有し、
前記制御部は、前記撹拌工程中は、前記浴湯熱暖房経路を前記第２経路に切り替える
ことを特徴とする［５］または［６］に記載の浴湯熱暖房システム。 [7] A path changing unit that switches between the first path that passes through the radiator and the second path that bypasses the heat radiator,
The hot water heating/heating system according to [5] or [6] , wherein the control unit switches the hot water heating/heating path to the second path during the stirring process.

上記発明では、撹拌工程では、放熱器をバイパスした経路として、循環効率を高める。 In the above invention, in the stirring step, the circulation efficiency is increased by using the path bypassing the radiator.

［８］前記制御部は、次回の撹拌工程の実行前に、次回の撹拌工程を実行後の浴槽水の平均温度を推定し、該平均温度が予め定めた暖房運転の停止温度以下の場合は、次回の撹拌工程を行わずに暖房運転を継続する
ことを特徴とする［５］乃至［７］のいずれか１つに記載の浴湯熱暖房システム。 [ 8 ] The control unit estimates the average temperature of the bath water after the next stirring process is performed before the next stirring process is performed, and when the average temperature is equal to or lower than a predetermined heating operation stop temperature, The heating system for heating bath water according to any one of [5] to [ 7], wherein the heating operation is continued without performing the next stirring step.

上記発明では、撹拌して平均化した風呂温度が暖房運転の停止温度以下の場合は、撹拌せずに、冷たい水の層から浴槽水取込口までの間にある暖かい湯を暖房に利用する。 In the above invention, when the bath temperature averaged by stirring is equal to or lower than the stop temperature of the heating operation, warm water between the cold water layer and the bath water intake is used for heating without stirring. ..

［９］前記制御部は、設定された終了時刻まで暖房運転を継続できるように、前記循環ポンプの送出流量を調整すると共に、設定された終了時刻まで暖房運転を最小流量で継続するのに浴槽水の保有する熱量が不足する場合は、暖房運転を、所定時間停止させてから再開させる
ことを特徴とする［１］乃至［４］のいずれか１つに記載の浴湯熱暖房システム。 [ 9 ] The controller adjusts the delivery flow rate of the circulation pump so that the heating operation can be continued until the set end time, and the bathtub is used to continue the heating operation at the minimum flow rate until the set end time. When the amount of heat held by water is insufficient, the heating operation is stopped and restarted for a predetermined time, and the bath water heating/heating system according to any one of [1] to [4].

［１０］風呂の追い焚き機能を備えた風呂給湯器と、
前記風呂給湯器の風呂の追い焚き経路を、前記放熱器を経由する前記浴湯熱暖房経路と前記放熱器をバイパスする経路に切り換える切り替え弁を有し、
前記循環ポンプは、前記風呂給湯器が備える追い焚き用の循環ポンプであり、
前記制御部は、前記浴槽水の残熱を利用した暖房運転を行う場合に、前記追い焚き経路を前記浴湯熱暖房経路に切り替えて前記循環ポンプを駆動する
ことを特徴とする［１］乃至［９］のいずれか１つに記載の浴湯熱暖房システム。 [ 10 ] A bath water heater with a bath reheating function,
A bath reheating path of the bath water heater has a switching valve for switching to the bath hot water heating and heating path passing through the radiator and the path bypassing the radiator,
The circulation pump is a circulation pump for additional heating provided in the bath water heater,
When performing the heating operation using the residual heat of the bath water, the control unit switches the reheating route to the bath hot water heating route to drive the circulation pump [1] to [ 9 ] The hot water bath heating system according to any one of [ 9 ].

［１１］前記放熱器は、温水を通す扁平管を、放熱板として、所定間隔をあけて複数併設して構成される
ことを特徴とする［１］乃至［１０］のいずれか１つに記載の浴湯熱暖房システム。 [ 11 ] The radiator is configured by arranging a plurality of flat tubes, through which hot water is passed, as radiator plates at predetermined intervals, [1] to [ 10 ]. Bath hot water heating system.

上記発明では、少ない体積で良好な熱交換が可能になる。 In the above invention, good heat exchange is possible with a small volume.

本発明に係る浴湯熱暖房システムによれば、外気を室内に取り入れる給気口に取り付けた放熱器に風呂の残り湯を循環させて行う暖房動作を、給気口近くの室内に居る人においても快適となるようにして、長時間継続することができる。 According to the bath hot water heating/heating system of the present invention, a heating operation is performed by circulating the remaining hot water in the bath through a radiator attached to the air intake port for taking in the outside air into the room, for a person in the room near the air intake port. Can be comfortable and can continue for a long time.

給気口に放熱器を取り付けた状態を示す説明図である。It is explanatory drawing which shows the state which attached the radiator to the air supply opening. 放熱器とその周囲の給気ダクトを示す斜視図である。It is a perspective view showing a radiator and an air supply duct around it. マイクロ扁平管熱交換器の概略構成を示す断面および２枚のマイクロ扁平管を取り出して示す図ある。It is a figure which takes out and shows the cross section which shows schematic structure of a micro flat tube heat exchanger, and two micro flat tubes. 本実施の形態に係る浴湯熱暖房システムおよびこれに使用される風呂給湯器を示す概略構成図である。1 is a schematic configuration diagram showing a bath water heating and heating system according to the present embodiment and a bath water heater used for the system. 風呂温度に基づく浴湯熱暖房制御を示す流れ図である。It is a flow chart which shows bath hot water heating control based on bath temperature. 暖房動作によって浴槽内に温度成層が形成された状態および撹拌工程によって温度成層が解消された状態等を示す図である。It is a figure which shows the state etc. which the temperature stratification was formed in the bathtub by the heating operation, and the state where the temperature stratification was eliminated by the stirring process. 浴湯熱暖房運転中の動作状態と浴槽から取り込まれる風呂温度の関係を示す図である。It is a figure which shows the relationship between the operating state and the bath temperature taken in from a bathtub during hot-water heating operation. 風呂温度と外気温度との温度差に基づく浴湯熱暖房制御を示す流れ図である。It is a flow chart which shows bath hot water heating control based on the temperature difference between bath temperature and outside temperature. 設定時間に基づく浴湯熱暖房制御を示す流れ図である。It is a flow chart which shows hot water heating and heating control based on the set time. 図９の続きを示す流れ図である。It is a flowchart which shows the continuation of FIG. フィンとチューブを用いた放熱器の例を示す斜視図である。It is a perspective view showing an example of a radiator using a fin and a tube. フィンとチューブを用いた放熱器の他の例を示す斜視図である。It is a perspective view showing other examples of a radiator using a fin and a tube. 浴槽の湯を使わずに放熱器による暖房動作が可能な風呂給湯器の概略構成を示す図である。It is a figure which shows schematic structure of the bath water heater which can perform heating operation by a radiator, without using the hot water of a bathtub. 住宅（マンション）に設置された２４時間換気システムの構成例を示す図である。It is a figure which shows the structural example of the 24-hour ventilation system installed in the house (condominium).

以下、図面に基づき本発明の実施の形態を説明する。 Embodiments of the present invention will be described below with reference to the drawings.

本実施の形態に係る浴湯熱暖房システム５で使用される放熱ユニット１０を給気口１０３に取り付けた状態の一例を示している。実施の形態に係る浴湯熱暖房システム５は、給気口１０３に取り付けた放熱ユニット１０に浴槽の残り湯を循環させて暖房する。給気口１０３は、背景技術で説明したものと同様に、排気はファンで行い、給気はファンを使用せずに自然に取込む方式（排気型）の２４時間換気システムにおける給気口１０３である。 1 shows an example of a state in which the heat dissipation unit 10 used in the bath water heating and heating system 5 according to the present embodiment is attached to the air supply port 103. The bath hot water heating/heating system 5 according to the embodiment heats the remaining heat of the bath by circulating it through the heat dissipation unit 10 attached to the air supply port 103. The air supply port 103 is similar to that described in the background art, and the air is exhausted by a fan, and the air supply port 103 in a 24-hour ventilation system that naturally takes in air without using a fan (exhaust type). Is.

給気口１０３は、屋外に面する壁に直径１００mm（あるいは１５０mm）ほどの穴を貫通させ、この穴に給気ダクト１０６を挿入し、その屋内側の端部に開け閉め可能な屋内側カバーユニット１０７を取り付け、屋外側の端部に、雨避けカバー１０８を取り付けて構成される。 The air supply port 103 has a hole having a diameter of about 100 mm (or 150 mm) penetrated through a wall facing the outdoors, an air supply duct 106 is inserted into this hole, and an indoor side cover that can be opened and closed at an end portion on the indoor side thereof. The unit 107 is attached, and a rain cover 108 is attached to the end portion on the outdoor side.

給気ダクト１０６の途中に本実施の形態に係る浴湯熱暖房システム５の放熱ユニット１０が取り付けてある。 The radiating unit 10 of the bath water heating and heating system 5 according to the present embodiment is attached in the middle of the air supply duct 106.

図２は、放熱ユニット１０とその周囲の給気ダクト１０６を示す斜視図である。放熱ユニット１０は、給気ダクト１０６に密に内挿される円板形状のベース板１１と、ベース板１１に大きく開設された矩形の貫通穴に嵌めこまれたマイクロ扁平管熱交換器１２を備えている。なお、以後、放熱ユニット１０のマイクロ扁平管熱交換器１２を放熱器１２とも記す。 FIG. 2 is a perspective view showing the heat dissipation unit 10 and the air supply duct 106 around the heat dissipation unit 10. The heat dissipation unit 10 includes a disk-shaped base plate 11 that is tightly inserted in the air supply duct 106, and a micro flat tube heat exchanger 12 that is fitted in a rectangular through hole that is largely opened in the base plate 11. ing. Note that, hereinafter, the micro flat-tube heat exchanger 12 of the heat dissipation unit 10 is also referred to as a radiator 12.

ベース板１１は不燃材で構成される。たとえば、ベース板１１は鋼鈑などで構成される。ベース板１１は、放熱器（マイクロ扁平管熱交換器）１２と給気口１０３の内壁との隙間を不燃材で封鎖する。 The base plate 11 is made of an incombustible material. For example, the base plate 11 is made of steel plate or the like. The base plate 11 seals the gap between the radiator (micro flat tube heat exchanger) 12 and the inner wall of the air supply port 103 with a noncombustible material.

図３は、放熱器であるマイクロ扁平管熱交換器１２の概略を示す断面図および２枚のマイクロ扁平管１５を取り出して示す斜視図ある。マイクロ扁平管熱交換器１２は、並行に配置した入水管１３と出水管１４との間に、薄く扁平した管路であるマイクロ扁平管１５を所定間隔で多数並列に接続して構成される。各マイクロ扁平管１５は放熱器１２の放熱板になっている。 FIG. 3 is a cross-sectional view showing an outline of the micro flat tube heat exchanger 12 which is a radiator and a perspective view showing two micro flat tubes 15 taken out. The micro flat tube heat exchanger 12 is configured by connecting a plurality of micro flat tubes 15, which are thin and flat pipe lines, in parallel at predetermined intervals between a water inlet tube 13 and a water outlet tube 14 arranged in parallel. Each micro flat tube 15 serves as a radiator plate of the radiator 12.

入水管１３から到来した温水は、分岐して各マイクロ扁平管１５の中を流れ、各マイクロ扁平管１５の他端側で出水管１４に流れ出て合流し、出水管１４の出口から流出する。 The warm water coming from the water inlet pipe 13 branches and flows in each micro flat pipe 15, flows out to the water outlet pipe 14 at the other end side of each micro flat pipe 15, joins, and flows out from the outlet of the water outlet pipe 14.

本例のマイクロ扁平管１５は、長さL＝６８mm、幅W＝１５mm、厚みH=０．７mm（板厚ｔ＝０．２mm、内部の水路の厚みはH=０．３mm）である。配列されたマイクロ扁平管１５同士の隙間D(間隔)は１．３mm程度になっている。通気抵抗は２０Pa（２５m3/h時）以下にする。なお、後述する風呂ポンプ６５による送水では、最大で０．１MPa程度の耐水圧があればよいので、マイクロ扁平管１５の板厚は０．２mm未満などの非常に薄い鋼鈑で問題ない。 The micro flat tube 15 of this example has a length L=68 mm, a width W=15 mm, and a thickness H=0.7 mm (plate thickness t=0.2 mm, internal water channel thickness H=0.3 mm). The gap D (space) between the arrayed micro flat tubes 15 is about 1.3 mm. The ventilation resistance should be 20Pa (at 25m 3 /h) or less. It should be noted that in the water supply by the bath pump 65, which will be described later, since the maximum water pressure resistance is about 0.1 MPa, there is no problem with a very thin steel plate having a plate thickness of the micro flat tube 15 of less than 0.2 mm.

配列されたマイクロ扁平管１５同士の隙間Dは、２．２mm以下、好ましくは１．８mm以下である。このような隙間でマイクロ扁平管１５を配列すれば、マイクロ扁平管１５とマイクロ扁平管１５の隙間Dを炎が通り抜けられなくなり、防火効果を得ることができる。 The gap D between the arrayed micro flat tubes 15 is 2.2 mm or less, preferably 1.8 mm or less. By arranging the micro flat tubes 15 in such a gap, the flame cannot pass through the gap D between the micro flat tubes 15 and the micro flat tubes 15, and the fire prevention effect can be obtained.

放熱ユニット１０では、マイクロ扁平管１５同士の間隔を消炎距離以下にすると共に、放熱器（マイクロ扁平管熱交換器）１２と給気口１０３の内側との隙間を不燃材のベース板１１で塞いでいるので、火災時に炎が給気口１０３を通過することを防ぎ、延焼を防ぐことができる。 In the heat dissipation unit 10, the space between the micro flat tubes 15 is set to be equal to or less than the flame-extinguishing distance, and the gap between the radiator (micro flat tube heat exchanger) 12 and the inside of the air supply port 103 is closed by the base plate 11 made of an incombustible material. Therefore, it is possible to prevent the flame from passing through the air supply port 103 at the time of fire and prevent the spread of fire.

フィンチューブを用いる放熱器においてもフィンの間隔を消炎距離以下にすれば上記と同様の効果を得ることができるが、フィンは構造的に弱いため、何らかの外力を受けて、火災の発生時に既に変形して隙間が広がっている可能性がある。また、火災の炎の熱によって溶融したり変形したりして消炎効果が継続しない。 Even in a radiator using a fin tube, the same effect as above can be obtained if the fin spacing is set to the extinction distance or less, but since the fin is structurally weak, it receives some external force and is already deformed when a fire occurs. There is a possibility that the gap has expanded. Moreover, the heat of the flame of a fire melts or deforms and the extinguishing effect does not continue.

これに対してマイクロ扁平管１５を用いた放熱ユニット１０では、マイクロ扁平管熱交換器１２の各マイクロ扁平管１５の形状は外力で容易に変形することなく安定している。さらに中が水で満たされているので、温度が上がり難い。なお、消炎距離は遮蔽物の温度が低いほど長くなるので、温度が上がり難いことは、消炎効果にとって有利に働く。 On the other hand, in the heat dissipation unit 10 using the micro flat tubes 15, the shape of each micro flat tube 15 of the micro flat tube heat exchanger 12 is stable without being easily deformed by an external force. Furthermore, since the inside is filled with water, it is difficult for the temperature to rise. Since the flame-extinguishing distance becomes longer as the temperature of the shield becomes lower, the difficulty in raising the temperature is advantageous for the flame-extinguishing effect.

図４は、本実施の形態に係る浴湯熱暖房システム５の概略構成を示す図である。浴湯熱暖房システム５は、放熱ユニット１０と、風呂給湯器３０と、浴湯切替ユニット７０を備えて構成される。 FIG. 4 is a diagram showing a schematic configuration of the bath water heating and heating system 5 according to the present embodiment. The bath hot water heating/heating system 5 includes a heat dissipation unit 10, a bath water heater 30, and a bath hot water switching unit 70.

風呂給湯器３０は、給水を加熱して浴室内のシャワーや台所の水栓等へお湯を供給（出湯）する給湯機能、浴槽２へ湯を落とし込み湯張りする注湯機能、浴槽２内の湯水を追い焚きして昇温する追い焚き機能などを備えている。また、浴槽２に設定温度の湯を設定水位になるように自動的に湯張りし、湯張り完了後は設定水位・設定温度が所定時間（たとえば、４時間）に渡って維持されるように追い焚き等を行う風呂の自動運転機能を備えている。さらに、浴槽２内の浴槽水を、給気口１０３に設けられた放熱ユニット１０の放熱器（マイクロ扁平管熱交換器）１２に循環させて部屋を暖房する浴湯熱暖房機能を有する。 The bath water heater 30 is a hot water supply function that heats the water supply to supply hot water to the shower in the bathroom or a faucet in the kitchen, etc., a pouring function for dropping hot water into the bathtub 2 and filling it with hot water, It is equipped with a reheating function that reheats and heats up. Further, hot water of a set temperature is automatically filled in the bathtub 2 so as to reach the set water level, and after the filling of the water is completed, the set water level/set temperature is maintained for a predetermined time (for example, 4 hours). It is equipped with an automatic bath operation function for reheating. Further, the bath water in the bathtub 2 has a bath water heating function to circulate the bath water in the radiator (micro flat tube heat exchanger) 12 of the heat dissipation unit 10 provided in the air supply port 103 to heat the room.

風呂給湯器３０は、燃焼ファン３１が送風する空気が下方から送り込まれ、上部に排気口３２が設けられた燃焼室３３を備えている。燃焼室３３内には、その下部に第１バーナ３４と第２バーナ３５が配置され、第１バーナ３４と第２バーナ３５の上方には給湯用の第１熱交換器３６が、第２バーナ３５の上方には追い焚き用の第２熱交換器３８がそれぞれ配置されている。第１熱交換器３６は、バーナの近くに配置された顕熱熱交換器３６ａと、顕熱熱交換器３６ａの下流に配置された潜熱熱交換器３６ｂとから構成される。第２熱交換器３８は顕熱熱交換器のみで構成される。 The bath water heater 30 is provided with a combustion chamber 33 in which the air blown by the combustion fan 31 is fed from below and an exhaust port 32 is provided in the upper portion. In the combustion chamber 33, a first burner 34 and a second burner 35 are arranged in the lower part, and a first heat exchanger 36 for hot water supply is provided above the first burner 34 and the second burner 35, and a second burner is provided. Second heat exchangers 38 for reheating are arranged above 35. The first heat exchanger 36 includes a sensible heat exchanger 36a arranged near the burner and a latent heat exchanger 36b arranged downstream of the sensible heat exchanger 36a. The second heat exchanger 38 is composed of only a sensible heat exchanger.

給水元から供給される給水は、給水管４１、第１熱交換器３６が有する水管（潜熱熱交換器３６ｂ、顕熱熱交換器３６ａの順）および給湯管４２を経て出湯される。給水管４１には、水量センサ５１、およびその下流に、水量を調整(制限)するための水量サーボ５２が設けてある。給水管４１と給湯管４２は、水量サーボ５２の直ぐ下流でバイパス管４３を通じて接続されており、バイパス管４３の途中には、バイパス管４３に流す水量を調整するバイパスサーボ５３が設けてある。 The water supplied from the water supply source is tapped through a water supply pipe 41, a water pipe of the first heat exchanger 36 (latent heat exchanger 36b, sensible heat exchanger 36a in this order), and a hot water supply pipe 42. The water supply pipe 41 is provided with a water amount sensor 51, and a water amount servo 52 for adjusting (limiting) the water amount downstream thereof. The water supply pipe 41 and the hot water supply pipe 42 are connected via a bypass pipe 43 immediately downstream of the water amount servo 52, and a bypass servo 53 for adjusting the amount of water flowing through the bypass pipe 43 is provided in the middle of the bypass pipe 43.

給湯管４２には第１熱交換器３６（顕熱熱交換器３６ａ）を出た直後の湯温を検出する熱交温度センサ６１、バイパス管４３からの給水が合流した後の湯温を検出する給湯温度センサ６２が設けてある。 In the hot water supply pipe 42, a heat exchange temperature sensor 61 for detecting the hot water temperature immediately after leaving the first heat exchanger 36 (sensible heat exchanger 36a), and a hot water temperature after the hot water supply from the bypass pipe 43 joins A hot water supply temperature sensor 62 is provided.

風呂の追い焚き経路は、浴槽２の浴湯取込口３から第２熱交換器３８の入側に通じる風呂戻り管４５と、第２熱交換器３８の水管と、第２熱交換器３８の出側から浴槽２の浴湯流出口４に至る風呂往き管４６で構成される。風呂戻り管４５の途中には、浴槽２側から順に、浴湯切替ユニット７０、風呂戻り温度センサ６４、風呂ポンプ６５、水位センサ６６、風呂水流スイッチ６７が設けてある。風呂往き管４６の途中には風呂往き温度センサ６８が設けてある。 The reheating route of the bath includes a bath return pipe 45 leading from the bath hot water inlet 3 of the bathtub 2 to the entrance side of the second heat exchanger 38, a water pipe of the second heat exchanger 38, and the second heat exchanger 38. It is composed of a bath outgoing pipe 46 extending from the outlet side of the bath to the bath hot water outlet 4 of the bathtub 2. In the middle of the bath return pipe 45, a bath hot water switching unit 70, a bath return temperature sensor 64, a bath pump 65, a water level sensor 66, and a bath water flow switch 67 are provided in order from the bath 2 side. A bath-going temperature sensor 68 is provided in the middle of the bath-going pipe 46.

給湯温度センサ６２の下流で給湯管４２から分岐した注湯管４７は風呂戻り温度センサ６４の箇所で風呂戻り管４５に合流する。注湯管４７の途中には、逆止弁５４および該注湯管４７の管路を開閉する注湯弁５５が設けてある。 The pouring pipe 47 branched from the hot water supply pipe 42 downstream of the hot water supply temperature sensor 62 joins the bath return pipe 45 at the bath return temperature sensor 64. A check valve 54 and a pouring valve 55 for opening and closing the conduit of the pouring pipe 47 are provided in the middle of the pouring pipe 47.

さらに、風呂戻り管４５の途中に介挿された浴湯切替ユニット７０は、風呂熱利用三方弁７１を有する。風呂熱利用三方弁７１は、浴槽２側の風呂戻り管４５が接続された第１接続口、風呂給湯器３０側の風呂戻り管４５が接続された第３接続口、放熱戻り管７４が接続された第２接続口を有する。風呂熱利用三方弁７１は、第１接続口と第３接続口を連通させ第２接続口を切り離した状態、すなわち、浴槽２側の風呂戻り管４５と風呂給湯器３０側の風呂戻り管４５を接続し、放熱戻り管７４を切り離した状態（風呂側）と、第２接続口と第３接続口を連通させ第１接続口を切り離した状態、すなわち、風呂給湯器３０側の風呂戻り管４５を放熱戻り管７４に接続し、風呂側の風呂戻り管４５を切り離した状態（暖房側）とに接続状態を切り換える。 Furthermore, the bath hot water switching unit 70 inserted in the bath return pipe 45 has a bath heat utilization three-way valve 71. The bath heat utilization three-way valve 71 is connected to a first connection port to which the bath return pipe 45 on the bathtub 2 side is connected, a third connection port to which the bath return pipe 45 on the bath water heater 30 side is connected, and a heat radiation return pipe 74. The second connection port is formed. The bath heat utilization three-way valve 71 is in a state where the first connection port and the third connection port are in communication with each other and the second connection port is disconnected, that is, the bath return pipe 45 on the bathtub 2 side and the bath return pipe 45 on the bath water heater 30 side. Is connected and the heat radiation return pipe 74 is disconnected (bath side), and the second connection port and the third connection port are communicated with each other, and the first connection port is disconnected, that is, the bath return pipe on the bath water heater 30 side. 45 is connected to the heat radiation return pipe 74, and the connection state is switched to a state in which the bath return pipe 45 on the bath side is disconnected (heating side).

放熱往き管７３は風呂熱利用三方弁７１の浴槽２側で風呂戻り管４５から分岐して、放熱ユニット１０の放熱器１２の入側に接続されている。放熱戻り管７４は放熱器１２の出側に接続され、他端は風呂熱利用三方弁７１の第２接続口に接続されている。複数の放熱ユニット１０を設置する場合、放熱往き管７３と放熱戻り管７４の間に各放熱ユニット１０の放熱器１２が並列に接続される。 The heat radiation outward pipe 73 branches from the bath return pipe 45 on the bath 2 side of the bath heat utilization three-way valve 71 and is connected to the inlet side of the radiator 12 of the heat radiation unit 10. The heat radiation return pipe 74 is connected to the outlet side of the radiator 12, and the other end is connected to the second connection port of the bath heat utilization three-way valve 71. When a plurality of heat dissipation units 10 are installed, the radiator 12 of each heat dissipation unit 10 is connected in parallel between the heat dissipation forward pipe 73 and the heat dissipation return pipe 74.

なお、浴湯熱暖房経路は、浴湯切替ユニット７０の風呂熱利用三方弁７１を暖房側に切り替えて、追い焚き経路を、放熱ユニット１０を経由するようにした経路である。また、風呂ポンプ６５は、浴槽２内の浴槽水を浴湯熱暖房経路に循環させる循環ポンプとしての機能を果たす。 In addition, the bath hot water heating/heating route is a route in which the bath heat utilization three-way valve 71 of the bath hot water switching unit 70 is switched to the heating side so that the reheating route passes through the heat radiating unit 10. The bath pump 65 also functions as a circulation pump that circulates the bath water in the bath 2 through the bath hot water heating path.

燃焼ガスの供給経路は次の様になっている。燃焼ガスの供給元に接続されるガス供給管８１の途中には、供給元からの燃焼ガスを遮断するか否かを切り替える元ガス電磁弁８２が設けられ、その下流には、供給する燃焼ガスの量を任意に調整するためのガス比例弁８３が設けてある。ガス供給管８１は、ガス比例弁８３の下流で２つに分岐し、それぞれガス電磁弁を介して第１バーナ３４および第２バーナ３５に接続されている。 The combustion gas supply route is as follows. A source gas solenoid valve 82 for switching whether or not to interrupt the combustion gas from the source is provided in the middle of the gas supply pipe 81 connected to the source of the combustion gas, and the source of the combustion gas to be supplied is provided downstream thereof. A gas proportional valve 83 for arbitrarily adjusting the amount of the gas is provided. The gas supply pipe 81 is branched into two downstream of the gas proportional valve 83, and is connected to the first burner 34 and the second burner 35 via the gas solenoid valves, respectively.

このほか、風呂給湯器３０は、外気温を検出する外気温度センサ６３を有する。さらに、風呂給湯器３０は、当該風呂給湯器３０の動作を制御する制御部９０を備える。制御部９０はＣＰＵ（Central Processing Unit）、ＲＯＭ（Read Only Memory）、ＲＡＭ（Random Access Memory）などを主要部とする回路で構成され、ＲＯＭに格納されたプログラムに従ってＣＰＵが各種の処理を実行することで風呂給湯器３０としての動作が実現される。 In addition, the bath water heater 30 has an outside air temperature sensor 63 that detects the outside air temperature. Furthermore, the bath water heater 30 includes a control unit 90 that controls the operation of the bath water heater 30. The control unit 90 is composed of a circuit having CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory) and the like as main components, and the CPU executes various processes according to a program stored in the ROM. As a result, the operation as the bath water heater 30 is realized.

制御部９０には、使用者から各種の設定や運転の指示を受ける機能、設定内容や運転状況を表示する機能等を備えたリモートコントローラ９１(リモコンと略称する)が通信線を介して接続される。ここでは、リモートコントローラ９１として、風呂に設置された風呂リモコン、台所等に設置されるメインリモコンなどがある。 A remote controller 91 (abbreviated as a remote controller) having a function of receiving various settings and driving instructions from a user, a function of displaying setting contents and a driving situation, etc. is connected to the control unit 90 via a communication line. It Here, as the remote controller 91, there are a bath remote controller installed in a bath, a main remote controller installed in a kitchen or the like.

次に、浴湯熱暖房システム５の風呂給湯器３０が行う給湯動作、注湯動作、追い焚き動作、放熱ユニット１０の放熱器１２を用いた暖房動作について説明する。 Next, a hot water supply operation, a pouring operation, a reheating operation, and a heating operation using the radiator 12 of the heat dissipation unit 10 performed by the bath water heater 30 of the hot water heating and heating system 5 will be described.

＜給湯動作＞
出湯栓が開かれて水量センサ５１が通水を検出すると制御部９０は、燃焼ファン３１をオンし、第１バーナ３４および第２バーナ３５を点火してこれらで燃焼ガスを燃焼させる。給水元から流入する給水は、第１熱交換器３６を通る際に加熱され、バイパスサーボ５３で給水と混合され、設定された給湯温度の湯にされて出湯栓から出湯する。 <Hot water supply operation>
When the hot water tap is opened and the water amount sensor 51 detects water flow, the control unit 90 turns on the combustion fan 31, ignites the first burner 34 and the second burner 35, and burns the combustion gas with these. The water supplied from the water supply source is heated when passing through the first heat exchanger 36, mixed with the water supplied by the bypass servo 53, made into hot water having a set hot water temperature, and discharged from the hot water tap.

＜注湯動作＞
注湯動作は、リモートコントローラ９１（風呂リモコンやメインリモコン）から、風呂の自動運転や注湯の指示を受けた場合に実行される。注湯動作では、制御部９０は、注湯弁５５を開くと共に燃焼ファン３１を作動させ、第１バーナ３４、第２バーナ３５を点火して燃焼ガスを燃焼させる。これにより、給湯動作と同様にして生成された湯が注湯管４７を通じて風呂戻り管４５に流れ込み、該風呂戻り管４５および風呂往き管４６を通じて浴槽２に落とし込まれる。なお、注湯動作では、浴湯切替ユニット７０の風呂熱利用三方弁７１は風呂側（第１接続口と第３接続口を連通させ第２接続口を切り離した状態）に設定される。 <Pouring operation>
The pouring operation is executed when an instruction for automatic bath operation or pouring is received from the remote controller 91 (bath remote controller or main remote controller). In the pouring operation, the control unit 90 opens the pouring valve 55 and operates the combustion fan 31 to ignite the first burner 34 and the second burner 35 to burn the combustion gas. As a result, hot water generated in the same manner as the hot water supply operation flows into the bath return pipe 45 through the pouring pipe 47 and is dropped into the bathtub 2 through the bath return pipe 45 and the bath return pipe 46. In the pouring operation, the bath heat utilization three-way valve 71 of the bath hot water switching unit 70 is set to the bath side (a state in which the first connection port and the third connection port are in communication with each other and the second connection port is disconnected).

＜追い焚き動作＞
追い焚き動作は、風呂の自動運転の指示に基づいて上記の注湯動作が行われて設定水位に湯張りされた後、浴槽２内の浴槽水の温度を風呂設定温度まで昇温させるとき、あるいは、風呂の自動運転中に浴槽２内の湯水を風呂設定温度に維持するために昇温するとき、あるいは、使用者から追い焚きの指示を受けた場合に実行される。 <Reheating operation>
The reheating operation is performed when the temperature of the bath water in the bathtub 2 is raised to the bath set temperature after the pouring operation is performed based on the instruction of the automatic operation of the bath and the water is filled to the set water level. Alternatively, it is executed when the temperature of the hot and cold water in the bathtub 2 is raised to maintain the bath set temperature during the automatic operation of the bath, or when the user gives a reheating instruction.

追い焚き動作では、制御部９０は、風呂ポンプ６５を作動させると共に、燃焼ファン３１を作動させ第２バーナ３５を点火し該第２バーナ３５で燃焼ガスを燃焼させる。風呂ポンプ６５の作用により、浴槽２内の湯が追い焚き経路を循環し、その途中の第２熱交換器３８を通る際に第２バーナ３５からの熱で加熱される。なお、追い焚き動作では、浴湯切替ユニット７０の風呂熱利用三方弁７１は風呂側に設定される。 In the reheating operation, the control unit 90 operates the bath pump 65 and the combustion fan 31 to ignite the second burner 35 and burn the combustion gas in the second burner 35. Due to the action of the bath pump 65, the hot water in the bathtub 2 circulates in the reheating route and is heated by the heat from the second burner 35 when passing through the second heat exchanger 38 in the middle thereof. In the reheating operation, the bath heat utilization three-way valve 71 of the bath water switching unit 70 is set to the bath side.

＜放熱器を用いた暖房動作＞
放熱ユニット１０の放熱器１２を用いた暖房動作では、風呂の自動運転の終了後に浴槽２の中に残っている浴槽水の熱を利用して暖房する。暖房動作では、浴湯切替ユニット７０の風呂熱利用三方弁７１を暖房側（第３接続口と第２接続口を連通させ第１接続口を切り離した状態）に切り替えて風呂ポンプ６５を駆動する。これにより、浴槽２内の湯が浴湯取込口３から取り込まれ、風呂戻り管４５の途中で放熱往き管７３側に流れ、放熱ユニット１０の放熱器（マイクロ扁平管熱交換器）１２および放熱戻り管７４を経て、風呂熱利用三方弁７１の箇所で風呂戻り管４５の風呂給湯器３０側（第２接続口から第３接続口）へ流れ込み、第２熱交換器３８、風呂往き管４６を通じて浴湯流出口４から浴槽２に流出する、という経路(浴湯熱暖房経路)で浴槽水が循環する。 <Heating operation using a radiator>
In the heating operation using the radiator 12 of the heat dissipation unit 10, the heat of the bath water remaining in the bath 2 is used to heat the bath after the automatic operation of the bath is completed. In the heating operation, the bath heat utilization three-way valve 71 of the bath water switching unit 70 is switched to the heating side (the third connection port and the second connection port are in communication with each other and the first connection port is disconnected) to drive the bath pump 65. .. As a result, the hot water in the bathtub 2 is taken in from the bath hot water intake port 3, flows to the side of the heat dissipation forward pipe 73 in the middle of the bath return pipe 45, and the radiator (micro flat tube heat exchanger) 12 of the heat dissipation unit 10 and After passing through the heat radiation return pipe 74, it flows into the bath water heater 30 side (from the second connection port to the third connection port) of the bath return pipe 45 at the location of the bath heat utilization three-way valve 71, and then the second heat exchanger 38 and the bath outflow pipe. The bath water circulates in a path (bath hot water heating/heating path) in which the bath water flows out of the bath hot water outlet 4 through the bath 46.

２４時間換気システムの作用で、常に、給気口１０３を通じて外気が屋内に取り込まれているので、暖房動作中は、給気口１０３に取り付けた放熱ユニット１０の放熱器１２によって外気が暖められて屋内に取り込まれる。 Since the outside air is constantly taken indoors through the air supply port 103 by the action of the 24-hour ventilation system, the outside air is warmed by the radiator 12 of the heat dissipation unit 10 attached to the air supply port 103 during the heating operation. It is taken indoors.

たとえば、風呂に入り終わった夜１０時から明け方の５時頃までにかけて２００W（２個で４００W）程度の暖房能力を得ることができ、ヒートショックの防止に貢献することができる。なお、放熱器１２に温水を流して暖房するので、たとえば、電気ヒータを給気口１０３の中に設置するような方式に比べて異常過熱（ショートや漏電による）がなく、火災を招く危険性が少ない。 For example, a heating capacity of about 200 W (400 W for two baths) can be obtained from 10 pm when the bath is finished to 5 pm at dawn, which can contribute to the prevention of heat shock. Since hot water is supplied to the radiator 12 to heat the radiator 12, for example, there is no abnormal overheating (due to short circuit or electric leakage) compared to a system in which an electric heater is installed in the air supply port 103, and there is a risk of causing a fire. Less is.

また、給気口１０３に放熱器１２を取り付けることで、室内スペースを圧迫せず、また、温度の低い外気を直接暖めるので、高い効率で暖房することができる。 Further, by mounting the radiator 12 on the air supply port 103, the indoor space is not pressed and the outside air having a low temperature is directly heated, so that heating can be performed with high efficiency.

次に、放熱ユニット１０を用いた風呂の残り湯による暖房運転（浴湯熱暖房運転とする）について説明する。 Next, the heating operation using the hot water remaining in the bath using the heat dissipation unit 10 (bath hot water heating operation) will be described.

浴湯熱暖房運転は、風呂の自動運転が終了してから翌日の明け方の所定時刻（たとえば、朝５時）まで継続して行われる。風呂給湯器３０の制御部９０は、浴湯熱暖房運転の暖房動作において、風呂ポンプ６５を断続的に動作させるのではなく、風呂ポンプ６５を連続動作させ、そのときの単位時間当たりの放熱量は、風呂ポンプ６５の流量で制御する。暖房動作中の風呂ポンプ６５の流量は、追い焚き動作での流量に比べて低流量に制御される。以下、浴湯熱暖房システム５の風呂給湯器３０が行う浴湯熱暖房運転の制御を複数種類示す。 The hot-water bath heating operation is continuously performed from the end of the automatic bath operation until a predetermined time (for example, 5:00 am) at dawn the next day. The control unit 90 of the bath water heater 30 does not intermittently operate the bath pump 65 in the heating operation of the bath hot water heating operation, but continuously operates the bath pump 65, and the heat radiation amount per unit time at that time. Is controlled by the flow rate of the bath pump 65. The flow rate of the bath pump 65 during the heating operation is controlled to be lower than the flow rate during the reheating operation. Hereinafter, a plurality of types of control of the bath water heating/heating operation performed by the bath water heater 30 of the bath water heating/heating system 5 will be described.

＜風呂温度に基づく浴湯熱暖房制御＞
図５は、風呂給湯器３０の制御部９０が行う、風呂温度に基づく浴湯熱暖房運転の制御を示す流れ図である。浴湯熱暖房運転がオンにされると、風呂給湯器３０の制御部９０は、風呂ポンプ６５を、最大流量（ここでは６Ｌ/min）に設定してオンにする（ステップＳ１０１）。そして、風呂水流スイッチ６７がオンになるか否かを調べる（ステップＳ１０２）。風呂水流スイッチ６７がオンにならなければ（ステップＳ１０２;Ｎｏ）、浴湯なしのエラーをリモートコントローラ９１に表示等し（ステップＳ１０３）、風呂ポンプ６５をオフにして（ステップＳ１０６）、本処理を終了する。 <Bath water heating/heating control based on bath temperature>
FIG. 5 is a flowchart showing the control of the bath hot water heating operation based on the bath temperature, which is performed by the controller 90 of the bath water heater 30. When the bath hot water heating operation is turned on, the controller 90 of the bath water heater 30 sets the bath pump 65 to the maximum flow rate (here, 6 L/min) and turns it on (step S101). Then, it is checked whether or not the bath water flow switch 67 is turned on (step S102). If the bath water flow switch 67 is not turned on (step S102; No), an error indicating that there is no bath water is displayed on the remote controller 91 (step S103), the bath pump 65 is turned off (step S106), and this process is executed. finish.

風呂水流スイッチ６７がオンになった場合は（ステップＳ１０２;Ｙｅｓ）、風呂戻り温度センサ６４により浴槽水の温度（風呂温度ＢＴ）を認識する（ステップＳ１０４）。 When the bath water flow switch 67 is turned on (step S102; Yes), the bath return temperature sensor 64 recognizes the temperature of the bath water (bath temperature BT) (step S104).

風呂温度（ＢＴ）が予め定めた停止温度（ここでは２８℃とする）以下の場合は（ステップＳ１０５;Ｙｅｓ）、暖房できないと判断し、風呂ポンプ６５をオフにして（ステップＳ１０６）、本処理を終了する。 When the bath temperature (BT) is equal to or lower than the predetermined stop temperature (here, 28° C.) (step S105; Yes), it is determined that heating cannot be performed, the bath pump 65 is turned off (step S106), and this processing is performed. To finish.

風呂温度（ＢＴ）が予め定めた停止温度（２８℃）を超える場合は（ステップＳ１０５;Ｎｏ）、風呂熱利用三方弁７１を暖房側に切り替え（ステップＳ１０７）、風呂ポンプ６５の流量を、風呂温度（ＢＴ）に応じた値に設定する（ステップＳ１０８）。詳細には、風呂温度が４１℃を超える場合は、風呂ポンプ６５の流量を第３流量（ＬＶ３）に設定し、風呂温度が４１℃以下で３４℃を超える範囲にある場合は、風呂ポンプ６５の流量を第２流量（ＬＶ２）に設定し、風呂温度が３４℃以下で２８℃を超える範囲にある場合は、風呂ポンプ６５の流量を第１流量（ＬＶ１）に設定する。ここでは、第１流量（ＬＶ１）は風呂ポンプ６５の最大流量の８０％、第２流量（ＬＶ２）は風呂ポンプ６５の最大流量の６０％、第３流量（ＬＶ３）は風呂ポンプ６５の最大流量の４０％、とする。 When the bath temperature (BT) exceeds the predetermined stop temperature (28° C.) (step S105; No), the bath heat utilization three-way valve 71 is switched to the heating side (step S107), and the flow rate of the bath pump 65 is changed to the bath. The value is set according to the temperature (BT) (step S108). Specifically, when the bath temperature exceeds 41°C, the flow rate of the bath pump 65 is set to the third flow rate (LV 3 ), and when the bath temperature is 41°C or lower and exceeds 34°C, the bath pump is set. The flow rate of 65 is set to the second flow rate (LV2), and when the bath temperature is in the range of 34° C. or lower and higher than 28° C., the flow rate of the bath pump 65 is set to the first flow rate (LV 1 ). Here, the first flow rate (LV1) is 80% of the maximum flow rate of the bath pump 65, the second flow rate (LV2) is 60% of the maximum flow rate of the bath pump 65, and the third flow rate (LV3) is the maximum flow rate of the bath pump 65. 40% of

風呂熱利用三方弁７１を暖房側に切り替え、風呂ポンプ６５を稼動させることで、浴槽水が放熱器１２を経由して循環して暖房が開始される。その後、風呂ポンプ６５を設定した流量で連続的に動作させて暖房動作を３０分行う（ステップＳ１０９;Ｎｏ）。３０分の暖房動作が終了したら（ステップＳ１０９;Ｙｅｓ）、風呂熱利用三方弁７１を風呂側に切り替え（ステップＳ１１０）、風呂ポンプ６５を最大流量で６０秒稼動させる撹拌工程を行う（ステップＳ１１１）。 By switching the bath heat utilization three-way valve 71 to the heating side and operating the bath pump 65, bath water circulates via the radiator 12 and heating is started. After that, the bath pump 65 is continuously operated at the set flow rate to perform the heating operation for 30 minutes (step S109; No). When the heating operation for 30 minutes is completed (step S109; Yes), the bath heat utilization three-way valve 71 is switched to the bath side (step S110), and a stirring step of operating the bath pump 65 at the maximum flow rate for 60 seconds is performed (step S111). ..

浴槽２の浴湯取込口３は浴湯流出口４より上の位置にあり、浴槽水を上部から吸い込んで下方に吐き出すようになっている。これは、通常の追い焚き時に、温かい湯を下方から浴槽２内に送り込んで対流を促し、浴槽２内の湯温を均一にするためである。しかし、放熱ユニット１０を用いた暖房動作では、浴槽２内の暖かい湯を上側の浴湯取込口３から吸い込み、放熱器１２で放熱されて冷たくなった湯を下側の浴湯流出口４から浴槽２に流し込むことになるので、図６（ａ）に示すように、冷たい湯が下に溜まって、浴槽２内に温度成層が形成される。 The bath hot water inlet 3 of the bathtub 2 is located above the bath hot water outlet 4, so that the bath water can be sucked in from the upper portion and discharged downward. This is because during normal reheating, warm water is sent into the bathtub 2 from below to promote convection and make the hot water temperature in the bathtub 2 uniform. However, in the heating operation using the heat dissipation unit 10, the warm hot water in the bathtub 2 is sucked from the upper bath hot water inlet 3, and the hot water radiated by the radiator 12 and cooled becomes lower bath hot water outlet 4. Since it is poured into the bathtub 2 from above, as shown in FIG. 6( a ), cold hot water is accumulated below and a temperature stratification is formed in the bathtub 2.

したがって、浴槽２内の浴槽水の湯温が、当初均一であれば、暖房運転中に浴湯取込口３から取り込む湯温は、しばらく同じ温度になる。しかし、暖房運転の継続に伴って浴槽２の下部に溜まる冷たい水の層の水位が次第に高くなり、図６(ｂ)に示すように、浴湯取込口３の水位までくると、その上に温かい湯が溜まっていても、以後は、その暖かい湯を取り込むことができず、暖房に利用できなくなる。 Therefore, if the bath temperature of the bath water in the bath 2 is initially uniform, the bath temperature taken in from the bath inlet 3 during the heating operation will be the same temperature for a while. However, as the heating operation continues, the water level of the layer of cold water that accumulates at the bottom of the bathtub 2 gradually rises, and when it reaches the water level of the bath water intake port 3 as shown in FIG. Even if there is warm water in the pool, the warm water cannot be taken in and cannot be used for heating.

そこで、暖房運転を３０分継続したら、一度、撹拌工程を行って、浴槽２内の湯温を均一にする。図６（ｃ）は撹拌工程後の浴槽２内の湯の状態を示している。浴槽２内の湯の温度が均一になっている。これにより、再び、温かい湯を浴湯取込口３から取り込むことができ、暖房動作を継続することが可能になる。 Therefore, after the heating operation is continued for 30 minutes, the stirring process is performed once to make the hot water temperature in the bathtub 2 uniform. FIG. 6C shows a state of hot water in the bathtub 2 after the stirring process. The temperature of the hot water in the bathtub 2 is uniform. As a result, hot water can be taken in again from the bath water intake port 3 and the heating operation can be continued.

撹拌工程が終了したら、ステップＳ１０４に戻って処理を継続する。図７は、暖房運転中の暖房動作や撹拌工程の実行期間と風呂温度等の関係を示している。３０分間の暖房動作中は、前述したように、温度成層が形成されるため、浴湯取込口３から取り込まれる浴槽水の温度（風呂温度）は変化しない。撹拌工程により風呂温度が一気に変化する。 When the stirring process ends, the process returns to step S104 and continues. FIG. 7 shows the relationship between the heating operation during the heating operation, the execution period of the stirring process, the bath temperature, and the like. During the heating operation for 30 minutes, as described above, since the temperature stratification is formed, the temperature of the bath water taken in from the bath hot water inlet 3 (bath temperature) does not change. The bath temperature changes all at once due to the stirring process.

風呂温度に基づく浴湯熱暖房制御では、ステップＳ１０８において、風呂温度（ＢＴ）が高いほど、風呂ポンプ６５の流量を低流量にするので、浴槽水が保有する熱量を少しずつ放熱ユニット１０で放熱して、長時間に渡って暖房を継続することができる。また、放熱ユニット１０による暖房動作を、風呂ポンプ６５をオンオフさせて断続的に行うと、風呂ポンプ６５のオンオフが給気口から室内に流入する空気の温度の変化に直結してしまい、給気口近くの室内に居る人に不快感を与えるおそれがあるが、本制御による浴湯熱暖房では、暖房運転中(撹拌工程を除く)は、風呂ポンプ６５を低流量で連続動作させるので、給気口から室内に流入する空気の温度が安定し、給気口近くの室内に居る人にとっても快適な暖房を行うことができる。 In the bath hot water heating/heating control based on the bath temperature, in step S108, the higher the bath temperature (BT) is, the lower the flow rate of the bath pump 65 is, so that the heat radiating unit 10 gradually radiates the heat amount of the bath water. Then, heating can be continued for a long time. Further, when the heating operation by the heat dissipation unit 10 is intermittently performed by turning on and off the bath pump 65, the on/off of the bath pump 65 is directly connected to the change in the temperature of the air flowing into the room from the air supply port, and the air supply is performed. There is a risk of giving discomfort to the person in the room near the mouth, but in the bath hot water heating by this control, the bath pump 65 is continuously operated at a low flow rate during heating operation (excluding the stirring process). The temperature of the air flowing into the room from the air outlet is stable, and comfortable heating can be performed even for a person who is in the room near the air inlet.

＜風呂温度と外気温度との温度差に基づく浴湯熱暖房制御＞
図８は、風呂温度と外気温度との温度差に基づく浴湯熱暖房運転の制御を示す流れ図である。浴湯熱暖房運転がオンにされると、風呂給湯器３０の制御部９０は、風呂ポンプ６５を、最大流量（６Ｌ/min）に設定してオンにする（ステップＳ２０１）。そして、風呂水流スイッチ６７がオンになるか否かを調べ（ステップＳ２０２）、風呂水流スイッチ６７がオンにならなければ（ステップＳ２０２;Ｎｏ）、浴湯なしのエラーをリモートコントローラ９１に表示等し（ステップＳ２０３）、風呂ポンプ６５をオフにして（ステップＳ２０７）、本処理を終了する。 <Bath water heating/heating control based on the temperature difference between the bath temperature and the outside temperature>
FIG. 8 is a flow chart showing the control of the bath hot water heating operation based on the temperature difference between the bath temperature and the outside air temperature. When the bath hot water heating operation is turned on, the controller 90 of the bath water heater 30 sets the bath pump 65 to the maximum flow rate (6 L/min) and turns it on (step S201). Then, it is checked whether or not the bath water flow switch 67 is turned on (step S202). If the bath water flow switch 67 is not turned on (step S202; No), an error indicating that there is no bath water is displayed on the remote controller 91. (Step S203), the bath pump 65 is turned off (step S207), and this processing ends.

風呂水流スイッチ６７がオンになった場合は（ステップＳ２０２;Ｙｅｓ）、制御部９０は、風呂戻り温度センサ６４により浴槽水の温度（風呂温度ＢＴ）を認識し（ステップＳ２０４）、さらに外気温度センサ６３で外気温度（ＯＴ）を検出する（ステップＳ２０５）。 When the bath water flow switch 67 is turned on (step S202; Yes), the controller 90 recognizes the temperature of the bath water (bath temperature BT) by the bath return temperature sensor 64 (step S204), and further the outside air temperature sensor. The outside air temperature (OT) is detected at 63 (step S205).

制御部９０は、風呂温度（ＢＴ）と外気温度(ＯＴ)との温度差が予め定めた停止温度（ここでは２１℃とする）以下の場合は（ステップＳ２０５;Ｙｅｓ）、暖房できないと判断し、風呂ポンプ６５をオフにして（ステップＳ２０７）、本処理を終了する。 When the temperature difference between the bath temperature (BT) and the outside air temperature (OT) is less than or equal to the predetermined stop temperature (here, 21° C.) (step S205; Yes), the control unit 90 determines that heating cannot be performed. The bath pump 65 is turned off (step S207), and this processing ends.

制御部９０は、風呂温度（ＢＴ）と外気温度(ＯＴ)との温度差が予め定めた停止温度（２１℃）を超える場合は（ステップＳ２０６;Ｎｏ）、風呂熱利用三方弁７１を暖房側に切り替え（ステップＳ２０８）、風呂ポンプ６５の流量を、風呂温度（ＢＴ）と外気温度(ＯＴ)との温度差に応じた値に設定する（ステップＳ２０９）。詳細には、温度差が３４℃を超える場合は、風呂ポンプ６５の流量を第３流量（ＬＶ３）に設定し、温度差が３４℃以下で２７℃を超える範囲にある場合は、風呂ポンプ６５の流量を第２流量（ＬＶ２）に設定し、温度差が２７℃以下で２１℃を超える範囲にある場合は、風呂ポンプ６５の流量を第１流量（ＬＶ１）に設定する。第１流量（ＬＶ１）は風呂ポンプ６５の最大流量の８０％、第２流量（ＬＶ２）は最大流量の６０％、第３流量（ＬＶ３）は、最大流量の４０％、とする。 When the temperature difference between the bath temperature (BT) and the outside air temperature (OT) exceeds the predetermined stop temperature (21° C.) (step S206; No), the controller 90 sets the bath heat utilization three-way valve 71 to the heating side. (Step S208), the flow rate of the bath pump 65 is set to a value corresponding to the temperature difference between the bath temperature (BT) and the outside air temperature (OT) (step S209). Specifically, when the temperature difference exceeds 34°C, the flow rate of the bath pump 65 is set to the third flow rate (LV 3 ), and when the temperature difference is 34°C or less and exceeds 27°C, the bath pump is set. The flow rate of 65 is set to the second flow rate (LV2), and when the temperature difference is 27° C. or less and exceeds 21° C., the flow rate of the bath pump 65 is set to the first flow rate (LV 1 ). The first flow rate (LV1) is 80% of the maximum flow rate of the bath pump 65, the second flow rate (LV2) is 60% of the maximum flow rate, and the third flow rate (LV3) is 40% of the maximum flow rate.

風呂熱利用三方弁７１を暖房側に切り替え、風呂ポンプ６５を動作させることで、浴槽水が放熱器１２を経由して循環して暖房が開始される。その後、制御部９０は、風呂ポンプ６５を設定した流量で連続的に動作させて暖房動作を３０分行う（ステップＳ２１０;Ｎｏ）。３０分の暖房動作が終了したら（ステップＳ２１０;Ｙｅｓ）、次回の撹拌工程実施後の風呂温度（ＢＴ´）を予測する(ステップＳ２１１)。 By switching the bath heat utilization three-way valve 71 to the heating side and operating the bath pump 65, the bath water circulates via the radiator 12 and heating is started. After that, the control unit 90 continuously operates the bath pump 65 at the set flow rate to perform the heating operation for 30 minutes (step S210; No). When the heating operation for 30 minutes is completed (step S210; Yes), the bath temperature (BT') after the next stirring process is performed is predicted (step S211).

制御部９０は、予測した風呂温度（ＢＴ´）と現在の外気温度（ＯＴ）との温度差が予め定めた停止温度以下でなければ(ステップＳ２１２;Ｎｏ)、風呂熱利用三方弁７１を風呂側に切り替え（ステップＳ２１３）、風呂ポンプ６５を最大流量で６０秒稼動させる撹拌工程を行って（ステップＳ２１４）、ステップＳ２０４に戻る。 If the temperature difference between the predicted bath temperature (BT') and the current outside air temperature (OT) is not less than or equal to the predetermined stop temperature (step S212; No), the control unit 90 causes the bath heat utilization three-way valve 71 to bathe. It is switched to the side (step S213), the stirring step of operating the bath pump 65 at the maximum flow rate for 60 seconds is performed (step S214), and the process returns to step S204.

一方、予測した風呂温度（ＢＴ´）と現在の外気温度（ＯＴ）との温度差が予め定めた停止温度以下の場合は(ステップＳ２１２;Ｙｅｓ)、撹拌工程を実施せずに、ステップＳ２０４に戻って処理を継続する。すなわち、次回の撹拌工程を実施すると、風呂温度（ＢＴ´）と現在の外気温度（ＯＴ）との温度差が予め定めた停止温度以下になる場合に、撹拌工程を実際に実施すると浴湯熱暖房は停止することになるが、次回の撹拌工程を行わなければ、図６（ｄ）に示すように、冷たい水の層から浴湯取込口３の水位までの間にある温かい湯を、浴湯取込口３から取り込んで、浴湯熱暖房に利用することができる。 On the other hand, when the temperature difference between the predicted bath temperature (BT') and the current outside air temperature (OT) is less than or equal to the predetermined stop temperature (step S212; Yes), the stirring process is not performed and the process proceeds to step S204. Return to continue processing. That is, when the next stirring process is performed, if the temperature difference between the bath temperature (BT′) and the current outside air temperature (OT) becomes equal to or lower than the predetermined stop temperature, the actual stirring process causes the bath water heat. Heating will be stopped, but if the next stirring process is not performed, as shown in FIG. 6(d), warm water between the layer of cold water and the water level of the bath water intake port 3 is It can be taken in from the bath water inlet 3 and used for heating the bath water.

そこで、予測した風呂温度（ＢＴ´）と現在の外気温度（ＯＴ）との温度差が予め定めた停止温度以下の場合は、撹拌工程を実施せずにそのまま浴湯熱暖房を継続して、浴湯の持つ熱を有効利用する。 Therefore, when the temperature difference between the predicted bath temperature (BT') and the current outside air temperature (OT) is less than or equal to the predetermined stop temperature, the bath hot water heating is continued without performing the stirring step, Effectively use the heat of the bath water.

＜設定時間に基づく浴湯熱暖房制御＞
設定時間に基づく浴湯熱暖房制御では、ユーザが設定した時刻まで浴湯熱暖房を継続できるように制御する。ユーザが、浴湯熱暖房を継続する時間（たとえば、５時間、夜１１時〜翌朝４時まで）をリモートコントローラ９１に設定して、浴湯熱暖房をオンにすると、制御部９０により図９に示す制御が開始される。たとえば、ユーザが、浴湯熱暖房を継続する時間として５時間に設定した場合、浴湯熱暖房を実行すべき残時間Ｔｈの初期値は５時間になる。 <Bath water heating and heating control based on set time>
In the bath hot water heating/heating control based on the set time, the bath hot water heating/heating is controlled so that it can be continued until the time set by the user. When the user sets the time (for example, 5 hours, from 11:00 pm to 4:00 the next morning) for which the bath hot water heating is continued in the remote controller 91 and turns on the hot bath hot air heating, the control unit 90 causes the controller 90 of FIG. The control shown in is started. For example, when the user sets 5 hours as the time for continuing the hot water heating and heating of the bath, the initial value of the remaining time Th at which the hot water heating and heating of the bath should be performed is 5 hours.

浴湯熱暖房運転がオンにされると、風呂給湯器３０の制御部９０は、風呂ポンプ６５を、最大流量（６Ｌ/min）に設定してオンにする（ステップＳ３０１）。そして、風呂水流スイッチ６７がオンになるか否かを調べ（ステップＳ３０２）、風呂水流スイッチ６７がオンにならなければ（ステップＳ３０２;Ｎｏ）、浴湯なしのエラーをリモートコントローラ９１に表示等し（ステップＳ３０３）、風呂ポンプ６５をオフにして（ステップＳ３０８）、本処理を終了する。 When the bath hot water heating operation is turned on, the controller 90 of the bath water heater 30 sets the bath pump 65 to the maximum flow rate (6 L/min) and turns it on (step S301). Then, it is checked whether or not the bath water flow switch 67 is turned on (step S302). If the bath water flow switch 67 is not turned on (step S302; No), an error indicating that there is no bath water is displayed on the remote controller 91, etc. (Step S303), the bath pump 65 is turned off (step S308), and this processing is ended.

制御部９０は、風呂水流スイッチ６７がオンになった場合は（ステップＳ２０２;Ｙｅｓ）、風呂ポンプ６５の流量を第３流量（ＬＶ３）に設定し(ステップＳ３０４)、風呂戻り温度センサ６４により浴槽水の温度（風呂温度ＢＴ）を認識し（ステップＳ３０５）、さらに外気温度センサ６３で外気温度（ＯＴ）を検出する（ステップＳ３０６）。これまでと同様に、第１流量（ＬＶ１）は風呂ポンプ６５の最大流量の８０％、第２流量（ＬＶ２）は最大流量の６０％、第３流量（ＬＶ３）は、最大流量の４０％、とする。 When the bath water flow switch 67 is turned on (step S202; Yes), the controller 90 sets the flow rate of the bath pump 65 to the third flow rate (LV3) (step S304), and the bath return temperature sensor 64 causes the bath to return to the bathtub. The water temperature (bath temperature BT) is recognized (step S305), and the outside air temperature sensor 63 detects the outside air temperature (OT) (step S306). As before, the first flow rate (LV1) is 80% of the maximum flow rate of the bath pump 65, the second flow rate (LV2) is 60% of the maximum flow rate, and the third flow rate (LV3) is 40% of the maximum flow rate. And

制御部９０は、風呂温度（ＢＴ）と外気温度(ＯＴ)との温度差が予め定めた停止温度（ここでは２１℃とする）以下の場合は（ステップＳ３０７;Ｙｅｓ）、暖房できないと判断し、風呂ポンプ６５をオフにして（ステップＳ３０８）、本処理を終了する。 When the temperature difference between the bath temperature (BT) and the outside air temperature (OT) is less than or equal to the predetermined stop temperature (here, 21° C.) (step S307; Yes), the control unit 90 determines that heating cannot be performed. The bath pump 65 is turned off (step S308), and this processing ends.

制御部９０は、風呂温度（ＢＴ）と外気温度(ＯＴ)との温度差が予め定めた停止温度（２１℃）を超える場合は（ステップＳ３０７;Ｎｏ）、風呂熱利用三方弁７１を暖房側に切り替える（ステップＳ３０９）。 When the temperature difference between the bath temperature (BT) and the outside air temperature (OT) exceeds the predetermined stop temperature (21° C.) (step S307; No), the controller 90 sets the bath heat utilization three-way valve 71 to the heating side. (Step S309).

これにより、浴槽水が放熱器１２を経由して循環して暖房が開始される。その後、設定した流量で風呂ポンプ６５を連続的に動作させて暖房動作を３０分行う（ステップＳ３１０;Ｎｏ）。３０分の暖房動作が終了したら（ステップＳ３１０;Ｙｅｓ）、残時間Ｔｈから０．５時間を減算する。 As a result, the bath water circulates via the radiator 12 and heating is started. After that, the bath pump 65 is continuously operated at the set flow rate to perform the heating operation for 30 minutes (step S310; No). When the heating operation for 30 minutes is completed (step S310; Yes), 0.5 hours is subtracted from the remaining time Th.

次に、制御部９０は、風呂熱利用三方弁７１を風呂側に切り替え（ステップＳ３１２）、風呂ポンプ６５を最大流量で６０秒稼動させる撹拌工程を行い（ステップＳ３１３）、風呂戻り温度センサ６４により撹拌工程後の浴槽水の温度（風呂温度ＢＦ）を認識する(図１０、ステップＳ３１４)。 Next, the control unit 90 switches the bath heat utilization three-way valve 71 to the bath side (step S312), performs the stirring step of operating the bath pump 65 at the maximum flow rate for 60 seconds (step S313), and controls the bath return temperature sensor 64. The temperature of the bath water (bath temperature BF) after the stirring process is recognized (FIG. 10, step S314).

そして、制御部９０は、３０分間の暖房動作を実行する前の風呂温度（ＢＴ）と、実行後の風呂温度（ＢＦ）から、第１流量（ＬＶ１）で暖房動作を継続した場合の放熱可能時間Ｔ１と、第２流量（ＬＶ２）で暖房動作を継続した場合の放熱可能時間Ｔ２と、第３流量（ＬＶ３）で暖房動作を継続した場合の放熱可能時間Ｔ３を算出する(ステップＳ３１５)。 Then, the control unit 90 can radiate heat when the heating operation is continued at the first flow rate (LV1) from the bath temperature (BT) before the heating operation for 30 minutes and the bath temperature (BF) after the execution. The time T1, the heat radiation possible time T2 when the heating operation is continued at the second flow rate (LV2), and the heat radiation possible time T3 when the heating operation is continued at the third flow rate (LV3) are calculated (step S315).

制御部９０は、第１流量（ＬＶ１）で暖房動作を継続した場合の放熱可能時間Ｔ１が残時間Ｔｈを超えるならば(ステップＳ３１６;Ｙｅｓ)、すなわち、最大流量の８０％で風呂ポンプ６５を稼動させる暖房動作を残時間Ｔｈ以上継続できるならば、風呂ポンプ６５の流量を第１流量（ＬＶ１）に設定して（ステップＳ３１７）、ステップＳ３０５に戻り、処理を継続する。 If the heat radiation possible time T1 when the heating operation is continued at the first flow rate (LV1) exceeds the remaining time Th (step S316; Yes), that is, the control unit 90 turns on the bath pump 65 at 80% of the maximum flow rate. If the heating operation to be operated can be continued for the remaining time Th or more, the flow rate of the bath pump 65 is set to the first flow rate (LV1) (step S317), the process returns to step S305, and the process is continued.

制御部９０は、第１流量（ＬＶ１）で暖房動作を継続した場合の放熱可能時間Ｔ１が残時間Ｔｈを超えないが（ステップＳ３１６;Ｎｏ）、第２流量（ＬＶ２）で暖房動作を継続した場合の放熱可能時間Ｔ２が残時間Ｔｈを超えるならば(ステップＳ３１８;Ｙｅｓ)、すなわち、最大流量の８０％で風呂ポンプ６５を稼動させる暖房動作を残時間Ｔｈ以上継続できないが、最大流量の６０％であれば暖房動作を残時間Ｔｈ以上継続できるならば、風呂ポンプ６５の流量を第２流量（ＬＶ２）に設定して(ステップＳ３１９)、ステップＳ３０５に戻り、処理を継続する。 The control unit 90 continues the heating operation at the second flow rate (LV2), although the heat radiation possible time T1 when the heating operation is continued at the first flow rate (LV1) does not exceed the remaining time Th (step S316; No). If the heat radiation possible time T2 in this case exceeds the remaining time Th (step S318; Yes), that is, the heating operation for operating the bath pump 65 at 80% of the maximum flow rate cannot be continued for the remaining time Th or more, but 60% of the maximum flow rate. If the heating operation can be continued for the remaining time Th or more if it is %, the flow rate of the bath pump 65 is set to the second flow rate (LV2) (step S319), the process returns to step S305, and the process is continued.

制御部９０は、第２流量（ＬＶ２）で暖房動作を継続した場合の放熱可能時間Ｔ２が残時間Ｔｈを超えないが（ステップＳ３１８;Ｎｏ）、第３流量（ＬＶ３）で暖房動作を継続した場合の放熱可能時間Ｔ３が残時間Ｔｈを超えるならば(ステップＳ３２０;Ｙｅｓ)、すなわち、最大流量の８０％や６０％で風呂ポンプ６５を稼動させる暖房動作を残時間Ｔｈ以上継続できないが、最大流量の４０％であれば暖房動作を残時間Ｔｈ以上継続できるならば、風呂ポンプ６５の流量を第３流量（ＬＶ３）に設定して(ステップＳ３２１)、ステップＳ３０５に戻り、処理を継続する。 The control unit 90 continues the heating operation at the third flow rate (LV3), though the heat radiation possible time T2 when the heating operation is continued at the second flow rate (LV2) does not exceed the remaining time Th (step S318; No). If the heat radiation possible time T3 in this case exceeds the remaining time Th (step S320; Yes), that is, the heating operation for operating the bath pump 65 at 80% or 60% of the maximum flow rate cannot be continued for the remaining time Th or more, but the maximum If the heating operation can be continued for the remaining time Th or more at 40% of the flow rate, the flow rate of the bath pump 65 is set to the third flow rate (LV3) (step S321), the process returns to step S305, and the process is continued.

制御部９０は、第３流量（ＬＶ３）で暖房動作を継続した場合の放熱可能時間Ｔ３が残時間Ｔｈを超えない場合は（ステップＳ３２０;Ｎｏ）、風呂ポンプ６５を停止させて３０分待機し（ステップＳ３２２）、その後、風呂ポンプ６５の流量を第３流量（ＬＶ３）に設定して(ステップＳ３２３)、ステップＳ３０５に戻り、処理を継続する。３０分間の暖房動作の停止は、ユーザの設定した時間の終了近くで暖房動作が実行されることを優先したものである。 When the heat radiation possible time T3 when the heating operation is continued at the third flow rate (LV3) does not exceed the remaining time Th (step S320; No), the control unit 90 stops the bath pump 65 and waits for 30 minutes. (Step S322) After that, the flow rate of the bath pump 65 is set to the third flow rate (LV3) (step S323), the process returns to step S305, and the process is continued. The stop of the heating operation for 30 minutes gives priority to the heating operation being executed near the end of the time set by the user.

このように、設定時間に基づく浴湯熱暖房制御では、放熱量を制御することで、風呂ポンプ６５を連続的に稼動させつつ、ユーザの設定した時間（時刻まで）の浴湯熱暖房を継続することができる。また、放熱量（風呂ポンプ６５の流量）を最小にしても、ユーザの設定した時間まで浴湯熱暖房を継続できない場合は、ユーザの設定した時間の終了近くで暖房が働くように制御したので、たとえば、ユーザが早朝の４時や５時を浴湯熱暖房の終了時刻に設定した場合、トイレに起きたりする明け方の時間帯が優先的に暖房されるようになり、ヒートショックを効果的に防止することができる。 In this way, in the bath hot water heating/heating control based on the set time, by controlling the heat radiation amount, the bath hot water heating/heating is continued for the time (until the time) set by the user while continuously operating the bath pump 65. can do. Further, even if the heat radiation amount (flow rate of the bath pump 65) is minimized, if the bath hot water heating cannot be continued until the time set by the user, the heating is controlled so as to work near the end of the time set by the user. , For example, when the user sets 4 o'clock or 5 o'clock in the early morning as the end time of the bath hot water heating, heating is performed preferentially during the dawn time when people get up in the toilet, and heat shock is effective. Can be prevented.

なお、放熱器１２は、図２、図３に示すようなマイクロ扁平管１５を用いたものに限定されない。図１１や図１２に示すようにフィンとチューブを用いるタイプの放熱器でもかまわない。この場合も延焼効果を得るならば、フィンとフィンの隙間（円筒形の場合は最大の箇所の隙間）を消炎距離以下、具体的には２．２mm以下、好ましくは１．８mm以下にする。ただし、フィンの変形や火災時の溶融・変形、さらに必要な放熱量を少ない設置スペースで稼ぐことを考慮すれば、マイクロ扁平管１５で構成することが望ましい。 The radiator 12 is not limited to the one using the micro flat tube 15 as shown in FIGS. 2 and 3. A radiator using fins and tubes as shown in FIGS. 11 and 12 may be used. Also in this case, in order to obtain a fire spread effect, the gap between the fins (the maximum gap in the case of a cylindrical shape) is set to be equal to or less than the extinction distance, specifically 2.2 mm or less, preferably 1.8 mm or less. However, considering that the fins are deformed, melted and deformed at the time of fire, and that the required heat radiation amount can be obtained in a small installation space, the micro flat tube 15 is preferable.

また、放熱器１２に循環させる温水として浴槽２内の浴槽水を利用する例を示したが、浴槽水が無いような場合には、浴槽水以外の温水を循環させてもかまわない。 Although an example of using the bath water in the bath 2 as the hot water to be circulated in the radiator 12 has been shown, hot water other than the bath water may be circulated when there is no bath water.

たとえば、図１３に示す風呂給湯器３０Ｂでは、浴槽２に浴槽水が無い場合には、追い焚き経路から浴槽２を切り離し、放熱器１２と追い焚き用の熱交換器３９を経由して湯水を循環させることができる。熱源は、暖房側のバーナ（第２バーナ３５）を用いる。循環させる湯水が、不足するもしくは無い場合には、給湯側から注湯管４７を通じて補給する。 For example, in the bath water heater 30B shown in FIG. 13, when there is no bath water in the bathtub 2, the bathtub 2 is separated from the reheating route, and hot water is supplied via the radiator 12 and the heat exchanger 39 for reheating. Can be circulated. A heating-side burner (second burner 35) is used as the heat source. When the hot water to be circulated is insufficient or absent, the hot water is supplied from the hot water supply side through the pouring pipe 47.

図１３では、図４と同一部分には同一の符号を付してある。風呂給湯器３０Ｂでは、風呂の追い焚き経路は、水−水熱交換器３９の二次側配管を経由する。水-水熱交換器３９の一次側は、シスターン５６から循環ポンプ５７、第２熱交換器３８の顕熱熱交換器３８ａ、水-水熱交換器３９の一次側、第２熱交換器３８の潜熱熱交換器３８ｂを経てシスターン５６に戻る循環経路に含まれる。循環ポンプ５７の作用でこの循環経路を循環する湯水は第２熱交換器３８を通る際に第２バーナ３５からの熱を受けて加熱され、その熱は水-水熱交換器３９を通る際に一次側から二次側に移動する。 13, the same parts as those in FIG. 4 are designated by the same reference numerals. In the bath water heater 30B, the reheating route of the bath passes through the secondary pipe of the water-water heat exchanger 39. The primary side of the water-water heat exchanger 39 is from the cistern 56 to the circulation pump 57, the sensible heat exchanger 38a of the second heat exchanger 38, the primary side of the water-water heat exchanger 39, and the second heat exchanger 38. It is included in the circulation path that returns to the cistern 56 via the latent heat exchanger 38b. The hot water circulating in this circulation path by the action of the circulation pump 57 is heated by receiving heat from the second burner 35 when passing through the second heat exchanger 38, and the heat is passed when passing through the water-water heat exchanger 39. To move from the primary side to the secondary side.

図１３に示す風呂給湯器３０Ｂを用いた浴湯熱暖房システム５の浴湯切替ユニット７０Ｂは、前述の風呂熱利用三方弁７１に加えて、風呂バイパス三方弁７２、気水分離機７３を備える。風呂バイパス三方弁７２は、浴槽２の手前で風呂戻り管４５と風呂往き管４６を接続して浴槽２をバイパスする状態（風呂迂回側、図中の第２接続口と第３接続口を連通させ第１接続口を切り離した状態）と、浴槽２をバイパスしない通常の追い焚き経路（風呂経由側、図中の第３接続口と第１接続口を連通させ第２接続口を切り離した状態）とするかを切り換える。 The bath hot water switching unit 70B of the bath hot water heating/heating system 5 using the bath water heater 30B shown in FIG. 13 includes a bath bypass three-way valve 72 and a steam separator 73 in addition to the bath heat utilization three-way valve 71 described above. .. The bath bypass three-way valve 72 connects the bath return pipe 45 and the bath outflow pipe 46 in front of the bathtub 2 to bypass the bathtub 2 (bath bypass side, connecting the second connection port and the third connection port in the figure). And a state in which the first connection port is disconnected) and a normal reheating route that does not bypass the bathtub 2 (a bath passage side, a state in which the third connection port and the first connection port in the figure are in communication with each other and the second connection port is disconnected) ) And switch.

浴槽２内の湯を用いて放熱ユニット１０による浴湯熱暖房運転を行う場合は、風呂バイパス三方弁７２を風呂経由側に設定し、図４に示した風呂給湯器３０と同様の暖房動作を行う。浴槽２の湯を利用しないで暖房動作を行う場合には、風呂バイパス三方弁７２を風呂迂回側に切り替え、風呂熱利用三方弁７１を暖房側に設定する。また、浴槽２をバイパスさせた追い焚き経路に、注湯管４７を通じて湯または水を補給する。その後、風呂ポンプ６５および循環ポンプ５７をオンにして、風呂往き温度センサ６８の検出温度が４０℃等になるように、第２バーナ３５の燃焼量等を制御する。 When the hot water in the bathtub 2 is used to perform the hot water heating/heating operation by the heat radiating unit 10, the bath bypass three-way valve 72 is set on the side of the bath, and the same heating operation as the bath water heater 30 shown in FIG. 4 is performed. To do. When the heating operation is performed without using the hot water in the bathtub 2, the bath bypass three-way valve 72 is switched to the bath bypass side and the bath heat utilization three-way valve 71 is set to the heating side. Further, hot water or water is supplied to the reheating route bypassing the bathtub 2 through the pouring pipe 47. After that, the bath pump 65 and the circulation pump 57 are turned on, and the combustion amount and the like of the second burner 35 are controlled so that the temperature detected by the bath-outgoing temperature sensor 68 becomes 40° C. or the like.

以上、本発明の実施の形態を図面によって説明してきたが、具体的な構成は実施の形態に示したものに限られるものではなく、本発明の要旨を逸脱しない範囲における変更や追加があっても本発明に含まれる。 Although the embodiments of the present invention have been described above with reference to the drawings, the specific configurations are not limited to those shown in the embodiments, and there are changes and additions within the scope not departing from the gist of the present invention. Are also included in the present invention.

実施の形態では、暖房運転の開始時に浴槽２に存在していた浴湯の熱のみを利用して放熱ユニット１０による暖房を行ったが、たとえば、ユーザの設定した時間の暖房に熱量が不足する場合には、浴槽内の湯水を追い焚きするようにしてもよい。 In the embodiment, the heat is radiated by the heat dissipation unit 10 using only the heat of the bath water existing in the bathtub 2 at the start of the heating operation. However, for example, the amount of heat is insufficient for the heating at the time set by the user. In this case, the hot water in the bathtub may be reheated.

また、放熱ユニット１０の放熱器１２に温水を循環させるために実施の形態では風呂給湯器３０や風呂給湯器３０Ｂを利用したが、たとえば、燃料電池の排熱を利用するような装置を利用してもよい。燃料電池の排熱で湯を作って貯湯タンクにためる給湯システムを利用する場合、貯湯タンクが満蓄となって燃料電池の排熱を回収できない状態になったら、貯湯タンクの湯を浴槽に数リットル捨てて、浴槽内の湯温を上昇させ、この浴槽水を循環させて放熱器１２による暖房を行えばよい。 Further, in the embodiment, the bath water heater 30 and the bath water heater 30B are used to circulate the hot water through the radiator 12 of the heat dissipation unit 10. However, for example, a device that utilizes the exhaust heat of the fuel cell is used. May be. When using a hot water supply system that makes hot water from the exhaust heat of the fuel cell and stores it in the hot water storage tank, if the hot water storage tank becomes full and the exhaust heat of the fuel cell cannot be recovered, the hot water of the hot water storage tank is put in a bathtub. It suffices to discard the liter, raise the temperature of the hot water in the bathtub, circulate the bath water, and perform heating by the radiator 12.

次回の撹拌工程を実施した場合の風呂温度（ＢＴ´）を予測して、次回の撹拌工程を実施するか否かを判断する処理(図８のステップＳ２１１、Ｓ２１２)は、風呂温度に基づく浴湯熱暖房制御や設定時間に基づく浴湯熱暖房制御においても採用することができる。たとえば、設定時間に基づく浴湯熱暖房制御の場合、Ｓ３１１で０．５時間減算した後の残時間Ｔｈが０．５時間以下になったとき、次回の撹拌工程実施後の風呂温度を予測し、予測した風呂温度で浴湯暖房が停止になるか否かを判断し、停止になるならば、撹拌工程を行わずに暖房動作を継続するようにすればよい。 The process of predicting the bath temperature (BT′) when the next stirring process is performed and determining whether to perform the next stirring process (steps S211 and S212 in FIG. 8) is a bath based on the bath temperature. It can also be used in hot water heating/heating control and bath hot water heating/heating control based on set time. For example, in the case of bath hot water heating/heating control based on the set time, when the remaining time Th after subtracting 0.5 hours in S311 becomes 0.5 hours or less, the bath temperature after the next stirring process is predicted. It is determined whether or not the bath water heating is stopped at the predicted bath temperature, and if it is stopped, the heating operation may be continued without performing the stirring process.

２…浴槽
３…浴湯取込口
４…浴湯流出口
５…浴湯熱暖房システム
１０…放熱ユニット
１１…ベース板
１２…マイクロ扁平管熱交換器（放熱器）
１３…入水管
１４…出水管
１５…マイクロ扁平管
３０、３０Ｂ…風呂給湯器
３１…燃焼ファン
３２…排気口
３３…燃焼室
３４…第１バーナ
３５…第２バーナ
３６…第１熱交換器
３６ａ…顕熱熱交換器
３６ｂ…潜熱熱交換器
３８…第２熱交換器
３８ａ…顕熱熱交換器
３８ｂ…潜熱熱交換器
３９…水−水熱交換器
４１…給水管
４２…給湯管
４３…バイパス管
４５…風呂戻り管
４６…風呂往き管
４７…注湯管
５１…水量センサ
５２…水量サーボ
５３…バイパスサーボ
５４…逆止弁
５５…注湯弁
５６…シスターン
５７…循環ポンプ
６１…熱交温度センサ
６２…給湯温度センサ
６３…外気温度センサ
６４…風呂戻り温度センサ
６５…風呂ポンプ
６６…水位センサ
６７…風呂水流スイッチ
６８…風呂往き温度センサ
７０…浴湯切替ユニット
７０Ｂ…浴湯切替ユニット
７１…逆止弁
７１…風呂熱利用三方弁
７２…風呂バイパス三方弁
７３…放熱往き管
７４…放熱戻り管
８１…ガス供給管
８２…元ガス電磁弁
８３…ガス比例弁
９０…制御部
９１…リモートコントローラ
１０３…給気口
１０６…給気ダクト
１０７…屋内側カバーユニット
１０８…雨避けカバー 2... Bathtub 3... Bath hot water inlet 4... Bath hot water outlet 5... Bath hot air heating system 10... Heat dissipation unit 11... Base plate 12... Micro flat tube heat exchanger (radiator)
13... Inlet pipe 14... Outlet pipe 15... Micro flat pipe 30, 30B... Bath water heater 31... Combustion fan 32... Exhaust port 33... Combustion chamber 34... First burner 35... Second burner 36... First heat exchanger 36a ...Sensible heat exchanger 36b...Latent heat exchanger 38...Second heat exchanger 38a...Sensible heat exchanger 38b...Latent heat exchanger 39...Water-water heat exchanger 41...Water supply pipe 42...Hot water supply pipe 43... Bypass pipe 45... Bath return pipe 46... Bath outflow pipe 47... Pouring pipe 51... Water amount sensor 52... Water amount servo 53... Bypass servo 54... Check valve 55... Pouring valve 56... Systurn 57... Circulation pump 61... Heat exchange Temperature sensor 62... Hot water supply temperature sensor 63... Outside air temperature sensor 64... Bath return temperature sensor 65... Bath pump 66... Water level sensor 67... Bath water flow switch 68... Bath going temperature sensor 70... Bath hot water switching unit 70B... Bath hot water switching unit 71 ... Check valve 71... Bath heat utilization three-way valve 72... Bath bypass three-way valve 73... Radiation forward pipe 74... Radiation return pipe 81... Gas supply pipe 82... Original gas solenoid valve 83... Gas proportional valve 90... Control part 91... Remote Controller 103... Air supply port 106... Air supply duct 107... Indoor side cover unit 108... Rain avoidance cover

Claims (11)

排気は別途ファンで行い、壁に設けられた屋外と屋内を繋ぐ貫通穴状の給気口からファンを使用せずに給気する２４時間換気システムの前記給気口の中に取り付けられる放熱器と、
浴槽から前記放熱器を経由して前記浴槽に戻る浴湯熱暖房経路と、
前記浴槽内の浴槽水を前記浴湯熱暖房経路に循環させる循環ポンプと、
制御部と
を有し、
前記制御部は、浴槽水の残熱を利用した暖房運転中は前記循環ポンプを連続動作させ、単位時間当たりの放熱量は、前記循環ポンプの流量で制御すると共に、暖房動作中の前記循環ポンプの流量を、風呂の追い焚き動作での流量に比べて低流量に制御する
ことを特徴とする浴湯熱暖房システム。 Exhaust is performed by a separate fan, and a radiator installed in the air supply port of the 24-hour ventilation system that supplies air without using a fan from a through-hole-shaped air supply port that connects the outdoors and the interior provided on the wall When,
A bath water heating and heating path that returns from the bathtub to the bathtub via the radiator,
A circulation pump that circulates bath water in the bath in the bath heating and heating path,
With a control unit,
The control unit continuously operates the circulation pump during a heating operation using the residual heat of the bath water, and controls the heat radiation amount per unit time by the flow rate of the circulation pump, and the circulation pump during the heating operation. The bath hot water heating system is characterized in that the flow rate of the bath is controlled to be lower than the flow rate in the reheating operation of the bath . 前記制御部は、前記浴槽水の温度が高いほど、前記循環ポンプの流量を少なくする
ことを特徴とする請求項１に記載の浴湯熱暖房システム。 The hot water heating and heating system according to claim 1, wherein the control unit reduces the flow rate of the circulation pump as the temperature of the bath water is higher. 前記制御部は、前記浴槽水の温度と外気温の差が大きいほど、前記循環ポンプの流量を少なくする
ことを特徴とする請求項１に記載の浴湯熱暖房システム。 The hot water heating and heating system according to claim 1, wherein the control unit reduces the flow rate of the circulation pump as the difference between the temperature of the bath water and the outside air temperature increases. 前記制御部は、前記浴槽水の保有する熱量で所定時間の暖房を継続する場合に、第１流量で前記循環ポンプを連動動作させると浴槽水の保有する熱量が不足する場合は、前記第１流量より少ない第２流量で前記循環ポンプを連動動作させる
ことを特徴とする請求項１に記載の浴湯熱暖房システム。 When the control unit operates the circulation pump at the first flow rate in an interlocking operation when the heating amount of the bath water is maintained for a predetermined period of time, the control unit determines whether the heat amount of the bath water is insufficient. The hot water bath heating system according to claim 1, wherein the circulation pump is operated in conjunction with a second flow rate that is smaller than the flow rate. 前記制御部は、前記循環ポンプの送出流量を一時的に高めて浴槽内の浴槽水を撹拌する撹拌工程を暖房運転途中で１または複数回実行する
ことを特徴とする請求項１乃至４のいずれか１つに記載の浴湯熱暖房システム。 5. The control unit executes the stirring step of temporarily increasing the delivery flow rate of the circulation pump to stir the bath water in the bath one or more times during the heating operation. The bath hot water heating system described in one. 前記制御部は、前記撹拌工程の完了時に測定した浴槽水温度に基づいて前記循環ポンプの流量を決定し、その流量で次回の撹拌工程まで前記循環ポンプを連続動作させる The control unit determines the flow rate of the circulation pump based on the bath water temperature measured at the completion of the stirring process, and continuously operates the circulation pump at the flow rate until the next stirring process.
ことを特徴とする請求項５に記載の浴湯熱暖房システム。 The hot water bath heating system according to claim 5, wherein 前記浴湯熱暖房経路を、前記放熱器を経由する第１経路とするか、前記放熱器をバイパスした第２経路とするかを切り換える経路変更部を有し、
前記制御部は、前記撹拌工程中は、前記浴湯熱暖房経路を前記第２経路に切り替える
ことを特徴とする請求項５または６に記載の浴湯熱暖房システム。 A hot water heating/heating path has a path changing unit for switching between a first path passing through the radiator and a second path bypassing the radiator;
The hot water heating and heating system according to claim 5 or 6 , wherein the controller switches the hot water heating and heating path to the second path during the stirring process. 前記制御部は、次回の撹拌工程の実行前に、次回の撹拌工程を実行後の浴槽水の平均温度を推定し、該平均温度が予め定めた暖房運転の停止温度以下の場合は、次回の撹拌工程を行わずに暖房運転を継続する
ことを特徴とする請求項５乃至７のいずれか１つに記載の浴湯熱暖房システム。 The control unit estimates the average temperature of the bath water after executing the next stirring process before executing the next stirring process, and when the average temperature is equal to or lower than the predetermined stop temperature of the heating operation, The heating operation is continued without performing the stirring step. The hot water bath heating system according to any one of claims 5 to 7 , wherein the heating operation is continued. 前記制御部は、設定された終了時刻まで暖房運転を継続できるように、前記循環ポンプの送出流量を調整すると共に、設定された終了時刻まで暖房運転を最小流量で継続するのに浴槽水の保有する熱量が不足する場合は、暖房運転を、所定時間停止させてから再開させる
ことを特徴とする請求項１乃至４のいずれか１つに記載の浴湯熱暖房システム。 The control unit adjusts the delivery flow rate of the circulation pump so that the heating operation can be continued until the set end time, and holds the bath water in order to continue the heating operation at the minimum flow rate until the set end time. The hot water heating system according to any one of claims 1 to 4 , wherein the heating operation is stopped for a predetermined time and then restarted when the amount of heat generated is insufficient . 風呂の追い焚き機能を備えた風呂給湯器と、
前記風呂給湯器の風呂の追い焚き経路を、前記放熱器を経由する前記浴湯熱暖房経路と前記放熱器をバイパスする経路に切り換える切り替え弁を有し、
前記循環ポンプは、前記風呂給湯器が備える追い焚き用の循環ポンプであり、
前記制御部は、前記浴槽水の残熱を利用した暖房運転を行う場合に、前記追い焚き経路を前記浴湯熱暖房経路に切り替えて前記循環ポンプを駆動する
ことを特徴とする請求項１乃至９のいずれか１つに記載の浴湯熱暖房システム。 A bath water heater with a bath reheating function,
A bath reheating path of the bath water heater has a switching valve for switching to the bath hot water heating and heating path passing through the radiator and the path bypassing the radiator,
The circulation pump is a circulation pump for additional heating provided in the bath water heater,
The control unit switches the reheating route to the bath water heating/heating route and drives the circulation pump when performing a heating operation using the residual heat of the bath water. 9. A hot water bath heating system according to any one of 9 above. 前記放熱器は、温水を通す扁平管を、放熱板として、所定間隔をあけて複数併設して構成される
ことを特徴とする請求項１乃至１０のいずれか１つに記載の浴湯熱暖房システム。 The hot water heating system according to any one of claims 1 to 10 , wherein the radiator comprises a plurality of flat tubes through which hot water is passed, as heat radiating plates, arranged at predetermined intervals. system.
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JPS5913865A (en) * 1982-07-15 1984-01-24 サンデン株式会社 Heat pump type air-conditioning water heater
JPS60108113A (en) * 1983-11-17 1985-06-13 Fujisash Co Manufacture of flat tube for heat exchanger
JPH0166515U (en) * 1987-10-26 1989-04-27
JP2001272106A (en) * 2000-03-27 2001-10-05 Toto Ltd Bath hot water heat recovery cold storage system
JP3741103B2 (en) * 2003-01-29 2006-02-01 松下電器産業株式会社 Water heater
JP2005233494A (en) * 2004-02-19 2005-09-02 Matsushita Electric Ind Co Ltd Heat exchange type ventilator
JP2009520767A (en) * 2005-12-22 2009-05-28 シエル・インターナシヨナル・リサーチ・マートスハツペイ・ベー・ヴエー Production of alkylene glycol in microchannel apparatus
JP2008196738A (en) * 2007-02-09 2008-08-28 Osaka Gas Co Ltd Ventilating device and heat exchange unit used in the same
JP2011179759A (en) * 2010-03-01 2011-09-15 Osaka Gas Co Ltd Duct case and air supply duct having the same
JP5795275B2 (en) * 2012-02-24 2015-10-14 株式会社コロナ Hot water heater

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