JP5347914B2 - Hot water storage water heater - Google Patents
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- JP5347914B2 JP5347914B2 JP2009258596A JP2009258596A JP5347914B2 JP 5347914 B2 JP5347914 B2 JP 5347914B2 JP 2009258596 A JP2009258596 A JP 2009258596A JP 2009258596 A JP2009258596 A JP 2009258596A JP 5347914 B2 JP5347914 B2 JP 5347914B2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 416
- 238000003303 reheating Methods 0.000 claims abstract description 180
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 159
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 159
- 239000001301 oxygen Substances 0.000 claims abstract description 159
- 238000001514 detection method Methods 0.000 claims abstract description 46
- 238000010411 cooking Methods 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 2
- 238000003287 bathing Methods 0.000 abstract description 19
- 238000010438 heat treatment Methods 0.000 description 27
- 238000002156 mixing Methods 0.000 description 14
- 239000003507 refrigerant Substances 0.000 description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 6
- 238000009835 boiling Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- Control For Baths (AREA)
Abstract
Description
本発明は、浴槽へ湯張りを行う機能が付いた貯湯式給湯機に関するものである。 The present invention relates to a hot water storage type hot water heater having a function of filling a bathtub with hot water.
従来、この種の給湯機としては、ガスや石油の燃焼熱を利用する瞬間加熱式のものや、貯湯タンクを持ち電気ヒーターやヒートポンプユニットで加熱するものなど、さまざまなタイプのものがあるが、何れのタイプにおいても、浴槽に予め設定した温度と湯量の湯を自動的に注湯し、その後、浴槽の湯温を一定に保つ自動湯張り機能を有するものが多く普及している（例えば、特許文献１参照）。 Conventionally, there are various types of water heaters of this type, such as those that instantaneously heat using the combustion heat of gas and oil, and those that have a hot water storage tank and heat with an electric heater or heat pump unit. In any of the types, many of them have an automatic hot water filling function that automatically pours a preset temperature and amount of hot water into a bathtub and then keeps the temperature of the bathtub constant (for example, Patent Document 1).
図１０は、従来の風呂追い焚き機能を備えた貯湯式給湯機の構成図である。なお、図１０には貯湯タンク内の湯水を沸き上げるための加熱手段は図示していないが、加熱手段としては、ヒーターやヒートポンプユニットを用いている。 FIG. 10 is a configuration diagram of a conventional hot water storage type water heater having a bath reheating function. In addition, although the heating means for boiling the hot water in the hot water storage tank is not shown in FIG. 10, a heater or a heat pump unit is used as the heating means.
図１０に示すように、従来からの貯湯式給湯機は、高温水を貯える貯湯タンク１０１を有し、貯湯タンク１０１内の湯水を浴槽１０２へ送る構成となっている。すなわち、貯湯タンク１０１と浴槽１０２との間に電磁弁１０３を設け、電磁弁１０３を開くことによって貯湯タンク１０１からの高温水は混合弁１０４で適温の温水となり、浴槽１０２へと供給される。 As shown in FIG. 10, the conventional hot water storage type hot water heater has a hot water storage tank 101 that stores high-temperature water, and is configured to send hot water in the hot water storage tank 101 to a bathtub 102. That is, an electromagnetic valve 103 is provided between the hot water storage tank 101 and the bathtub 102, and the hot water from the hot water storage tank 101 becomes hot water at an appropriate temperature by the mixing valve 104 by opening the electromagnetic valve 103 and is supplied to the bathtub 102.
そして、湯張り運転を開始する場合には、使用者が手動で湯張り運転を開始するか、予め湯張り運転を予約設定しておいた場合には、設定時刻になると自動で湯張り運転を開始する。そして湯張り運転が開始されると、設定温度の湯が設定した量だけ浴槽１０２へ注湯される。 And when starting the filling operation, if the user starts the filling operation manually, or if the hot water filling operation is reserved and set in advance, the filling operation is automatically performed at the set time. Start. When the hot water filling operation is started, hot water of a set temperature is poured into the bathtub 102 by a set amount.
また、図１０に示す貯湯式給湯機は、貯湯タンク１０１内の高温水と、浴槽１０２内の湯水とを熱交換して追い焚き運転が可能とする追い焚き熱交換器１０５と、貯湯タンク１０１内の高温水を追い焚き熱交換器１０５に搬送する追い焚きポンプ１０６と、浴槽１０２内の湯水を追い焚き熱交換器１０５に搬送する風呂ポンプ１０７を有している。また、浴槽１０２内の水位を検出するための水位センサ１０８、および浴槽１０２内の湯水の温度を検出するための温度センサ１０９を備えている。 Further, the hot water storage type hot water heater shown in FIG. 10 has a reheating heat exchanger 105 that enables a reheating operation by exchanging heat between the hot water in the hot water storage tank 101 and the hot water in the bathtub 102, and the hot water storage tank 101. It has a reheating pump 106 that replenishes the high-temperature water in the tank and conveys it to the heat exchanger 105, and a bath pump 107 that recirculates the hot water in the bathtub 102 and conveys it to the heat exchanger 105. Moreover, the water level sensor 108 for detecting the water level in the bathtub 102, and the temperature sensor 109 for detecting the temperature of the hot water in the bathtub 102 are provided.
そして追い焚き運転時には、追い焚きポンプ１０６を駆動して貯湯タンク１０１内の高温水を追い焚き熱交換器１０５へ送るとともに、風呂ポンプ１０７を駆動して浴槽１０２内の湯水を追い焚き熱交換器１０５へ送り、熱交換した後の湯水を再度浴槽１０２へ戻している。 At the time of reheating operation, the reheating pump 106 is driven to send high temperature water in the hot water storage tank 101 to the reheating heat exchanger 105, and the bath pump 107 is driven to regenerate hot water in the bathtub 102. The hot water after the heat exchange and the heat exchange is returned to the bathtub 102 again.
また、従来からの貯湯式給湯機は、自動追い焚き運転の機能を有している。図１１は、従来の自動追い焚き運転時のフローチャートである。図１１に示すように、湯張り運転が完了後、所定時間Ｌａ毎（例えば、１５分毎）に風呂ポンプ１０７が駆動し、浴槽１０２内の湯水の温度が温度センサ１０９で検出される。 In addition, the conventional hot water storage type hot water heater has a function of automatic chasing operation. FIG. 11 is a flowchart at the time of the conventional automatic chasing operation. As shown in FIG. 11, after the hot water filling operation is completed, the bath pump 107 is driven every predetermined time La (for example, every 15 minutes), and the temperature of the hot water in the bathtub 102 is detected by the temperature sensor 109.
そして、温度センサ１０９で検出される風呂温度が、追い焚き開始温度まで低下すると、追い焚きポンプ１０６および風呂ポンプ１０７が駆動し、浴槽１０２内の湯水が設定温度（追い焚き停止温度）になるまで自動で追い焚き運転が行われる。 When the bath temperature detected by the temperature sensor 109 decreases to the reheating start temperature, the reheating pump 106 and the bath pump 107 are driven until the hot water in the bathtub 102 reaches the set temperature (reheating stop temperature). A reckless driving is performed automatically.
一方、近年では快適な入浴を実現するために、浴槽内へ酸素を供給して酸素風呂を楽し
むことができるものがある（例えば、特許文献２参照）。
On the other hand, in recent years, in order to realize comfortable bathing, there is one that can supply oxygen into a bathtub and enjoy an oxygen bath (see, for example, Patent Document 2).
しかしながら、従来の貯湯式給湯機においては、人がいる・いないに関わらず、自動で追い焚き運転を行うために、図１１に示すように所定時間Ｌａ毎に風呂ポンプ１０７を駆動して、浴槽１０２内の湯水の温度を検出している。その結果、風呂ポンプ１０７を駆動するたびに、浴槽１０２と追い焚き熱交換器１０５とを接続している給湯配管内の冷めた湯水が、浴槽１０２内に入り込んでしまい、不必要に風呂の温度を下げてしまうという課題を有していた。 However, in the conventional hot water storage type water heater, the bath pump 107 is driven every predetermined time La as shown in FIG. The temperature of hot water in 102 is detected. As a result, every time the bath pump 107 is driven, the cold hot water in the hot water supply pipe connecting the bathtub 102 and the reheating heat exchanger 105 enters the bathtub 102, and the bath temperature is unnecessarily high. Had the problem of lowering.
一方、酸素運転中においては、配管内に酸素が供給されるため、酸素運転をしていないときに比べて浴槽内の湯水の温度低下が大きく、一定の所定時間Ｌａ毎に追い焚き運転を開始していたのでは、入浴者によっては非常にぬるいと感じてしまい、不快感を与えかねなかった。 On the other hand, during oxygen operation, since oxygen is supplied into the pipe, the temperature drop of the hot water in the bathtub is larger than when oxygen operation is not performed, and reheating operation is started every predetermined time La. However, some bathers felt it was very warm and could be uncomfortable.
本発明は、前記従来の課題を解決するもので、酸素運転機能が付いた貯湯式給湯機であっても、最適な浴槽内の追い焚き運転を行い、快適な入浴を実現することができる貯湯式給湯機を提供することを目的とする。 The present invention solves the above-described conventional problems, and even in a hot water storage type water heater with an oxygen operation function, the hot water storage that can perform comfortable bathing and realize comfortable bathing. An object is to provide a hot water heater.
前記従来の課題を解決するために、本発明の貯湯式給湯機は、高温水を貯える貯湯タンクと、浴槽と、浴槽内の湯水の温度を検出する浴槽温度検出手段と、貯湯タンク内の高温水と浴槽内の湯水とが熱交換を行う追い焚き熱交換器と、浴室の人を検出する人体検出手段と、浴槽内の湯水を追い焚き熱交換器へ送る風呂ポンプと、貯湯タンク内の高温水を追い焚き熱交換器へ送る追い焚きポンプと、浴槽へ酸素を供給する酸素富化装置と、浴槽内へ酸素を供給する酸素運転を開始する酸素開始手段とを備え、酸素運転中は、風呂ポンプを駆動させて追い焚き熱交換器から浴槽へ湯水が流れる配管に酸素富化装置からの酸素を混入させる貯湯式給湯機であって、酸素運転停止中は、人体検出手段で人を検出した時に浴槽内の湯水の追い炊き運転を開始し、酸素運転中は、人体検出手段によらず、浴槽温度検出手段で検出する温度に基づいて、浴槽内の湯水を追い焚きすることにより、酸素運転をしていないときには人体検出手段の人検出に基づいて追い焚き運転を行うことができるので、貯湯タンク内の高温水を不必要に使用して追い焚き運転をすることなく、さらに、酸素運転中においては、常に風呂ポンプを駆動して浴槽温度検出手段で浴槽内の湯水の温度を検出できる状態であるので、浴槽内の湯水の温度に基づいて追い焚き運転を行うことにより、浴槽内の湯水の温度を常時適温に保つことができる。 In order to solve the above-described conventional problems, a hot water storage type water heater of the present invention includes a hot water storage tank for storing high temperature water, a bathtub, a bathtub temperature detecting means for detecting the temperature of hot water in the bathtub, and a high temperature in the hot water storage tank. A reheating heat exchanger for exchanging heat between the water and hot water in the bathtub, a human body detecting means for detecting a person in the bathroom, a bath pump for reheating the hot water in the bathtub and sending it to the heat exchanger, and a hot water storage tank A reheating pump for replenishing high-temperature water to the heat exchanger, an oxygen enricher for supplying oxygen to the bathtub, and an oxygen starting means for starting oxygen operation for supplying oxygen into the bathtub are provided. , A hot water storage type hot water supply machine that mixes oxygen from the oxygen enricher into the piping where hot water flows from the reheating heat exchanger to the bathtub by driving the bath pump. When it is detected, follow-up operation of hot water in the bathtub During the oxygen operation, the human body detection means does not rely on the human body detection means, and the human body detection means is operated when the oxygen operation is not performed by chasing hot water in the bathtub based on the temperature detected by the bathtub temperature detection means. Since the reheating operation can be performed based on the detection, the bath pump is always driven during the oxygen operation without using the reheating operation by using the hot water in the hot water storage tank unnecessarily. Since the temperature of the hot water in the bathtub can be detected by the bathtub temperature detecting means, the temperature of the hot water in the bathtub can be always kept at an appropriate temperature by performing a reheating operation based on the temperature of the hot water in the bathtub. .
本発明は、酸素運転機能が付いた貯湯式給湯機であっても、最適な浴槽内の追い焚き運転を行い、快適な入浴を実現することができる貯湯式給湯機を提供することができる。 INDUSTRIAL APPLICABILITY The present invention can provide a hot water storage type hot water heater that can perform comfortable bathing and realize comfortable bathing even if it is a hot water storage type water heater with an oxygen operation function.
第１の発明の貯湯式給湯機は、高温水を貯える貯湯タンクと、浴槽と、浴槽内の湯水の温度を検出する浴槽温度検出手段と、貯湯タンク内の高温水と浴槽内の湯水とが熱交換を行う追い焚き熱交換器と、浴室の人を検出する人体検出手段と、浴槽内の湯水を追い焚き熱交換器へ送る風呂ポンプと、貯湯タンク内の高温水を追い焚き熱交換器へ送る追い焚きポンプと、浴槽へ酸素を供給する酸素富化装置と、浴槽内へ酸素を供給する酸素運転を開始する酸素開始手段とを備え、酸素運転中は、風呂ポンプを駆動させて追い焚き熱交換器から浴槽へ湯水が流れる配管に酸素富化装置からの酸素を混入させる貯湯式給湯機であって、酸素運転停止中は、人体検出手段で人を検出した時に浴槽内の湯水の追い炊き運転を開始し、酸素運転中は、人体検出手段によらず、浴槽温度検出手段で検出する温度に基づいて、浴槽内の湯水を追い焚きすることにより、酸素運転をしていないときには人体検出手段の人検出に基づいて追い焚き運転を行うことができるので、貯湯タンク内の高温水を不必要に使用して追い焚き運転をすることなく、さらに、酸素運転中においては、常に風呂ポンプを駆動して浴槽温度検出手段で浴槽内の湯水の温度を検出できる状態であるので、浴槽内の湯水の温度に基づいて追い焚き運転を行うことにより、浴槽内の湯水の温度を常時適温に保つことができる。 The hot water storage type water heater of the first invention comprises a hot water storage tank for storing high temperature water, a bathtub, bathtub temperature detecting means for detecting the temperature of hot water in the bathtub, hot water in the hot water tank and hot water in the bathtub. Reheating heat exchanger that performs heat exchange, human body detection means for detecting people in the bathroom, a bath pump that replenishes hot water in the bathtub and sends it to the heat exchanger, and reheats the hot water in the hot water storage tank A replenishing pump for sending oxygen to the bathtub, an oxygen enricher for supplying oxygen to the bathtub, and an oxygen starting means for starting the oxygen operation for supplying oxygen into the bathtub. During the oxygen operation, the bath pump is driven to follow. A hot water storage water heater that mixes oxygen from the oxygen enricher into a pipe through which hot water flows from the soaking heat exchanger to the bathtub, and when oxygen is stopped, the human body detection means detects water in the bathtub. Start cooking and start human operation during oxygen operation Regardless of the means, by replenishing hot water in the bathtub based on the temperature detected by the bath temperature detecting means, when the oxygen operation is not performed, the reheating operation is performed based on the human detection of the human body detecting means. Therefore, without using the hot water in the hot water storage tank unnecessarily, and during the oxygen operation, the bath pump is always driven and the hot water in the bathtub is detected by the bath temperature detecting means. Since the temperature can be detected, the temperature of the hot water in the bathtub can always be kept at an appropriate temperature by performing the reheating operation based on the temperature of the hot water in the bathtub.
第２の発明の貯湯式給湯機は、特に第１の発明において、浴室内に貯湯式給湯機の運転操作を行うリモコン装置を備え、リモコン装置には運転情報を表示する表示部を有するとともに、酸素運転停止時は、所定時間継続して人がいないことを人体検出手段で検知すると、表示部を消灯し、酸素運転中は、所定時間継続して人がいないことを人体検出手段で検知しても、表示部を消灯しないことにより、酸素運転停止中は、人の不在が確定すると表示部を消灯させて省エネ性を向上させることができ、酸素運転中は、人の不在を検出しても、表示部の点灯を継続させ酸素運転が継続していることを認識させることができる。 The hot water storage type water heater of the second aspect of the invention is particularly equipped with a remote control device for operating the hot water storage type hot water supply in the bathroom in the first aspect of the invention, and the remote control device has a display unit for displaying operation information, When the oxygen operation is stopped, the human body detection means detects that there is no person continuously for a predetermined time, and the human body detection means detects that there is no person continuously for a predetermined time during the oxygen operation. However, by not turning off the display unit, when the oxygen operation is stopped, the absence of a person can be confirmed to turn off the display unit to improve energy savings. During the oxygen operation, the absence of a person is detected. In addition, the lighting of the display unit can be continued to recognize that the oxygen operation is continued.
第３の発明の貯湯式給湯機は、特に第１または第２の発明において、酸素運転停止時は、所定時間毎に風呂ポンプを駆動して浴槽内の湯水の温度を検出して、浴槽内の湯水の温度が所定温度Ｔｓを下回ると追い焚き運転を開始し、酸素運転中は、浴槽内の湯水の温度が所定温度Ｔｓ２を下回ると追い炊き運転を開始し、所定温度Ｔｓ２は所定温度Ｔｓよりも大きいことにより、酸素運転停止時よりも酸素運転中の方が、浴槽内の湯水の保温性能を向上させることができる。 The hot water storage type water heater of the third invention is the first or second invention, in particular, when the oxygen operation is stopped, the bath pump is driven every predetermined time to detect the temperature of hot water in the bathtub, When the temperature of the hot water falls below the predetermined temperature Ts, the reheating operation is started. During the oxygen operation, the reheating operation is started when the temperature of the hot water in the bathtub falls below the predetermined temperature Ts2, and the predetermined temperature Ts2 is set to the predetermined temperature Ts2. Therefore, it is possible to improve the heat insulation performance of the hot water in the bathtub when the oxygen operation is in progress than when the oxygen operation is stopped.
第４の発明の貯湯式給湯機は、特に第３の発明において、酸素運転停止時の追い炊き運転は、浴槽内の湯水の温度が所定温度Ｔｗを上回ると追い焚き運転を停止し、酸素運転中の追い焚き運転は、浴槽内の湯水の温度が所定温度Ｔｗ２を上回ると追い炊き運転を停止し、所定温度Ｔｗ２は所定温度Ｔｗよりも小さいことにより、酸素運転停止時よりも酸素運転中の方が、浴槽内の湯水の温度を常時検出できる状態にあるので、より小さい幅での保温運転を行うことができ、高い温度に保温しなくても温度低下を検知すればすぐに保温運転を行うことができるので、貯湯タンク内の高温湯の使用を抑制することができる。 The hot water storage type water heater of the fourth aspect of the invention is particularly in the third aspect of the invention, in the reheating operation when the oxygen operation is stopped, the reheating operation is stopped when the temperature of the hot water in the bathtub exceeds a predetermined temperature Tw, and the oxygen operation is stopped. The internal reheating operation stops the additional cooking operation when the temperature of the hot water in the bathtub exceeds the predetermined temperature Tw2, and the predetermined temperature Tw2 is lower than the predetermined temperature Tw, so that the oxygen operation is performed more than when the oxygen operation is stopped. However, since the temperature of hot water in the bathtub can always be detected, it is possible to perform a heat insulation operation with a smaller width, and immediately perform a heat insulation operation if a temperature drop is detected without keeping the temperature high. Since it can be performed, use of the high temperature hot water in a hot water storage tank can be suppressed.
第５の発明の貯湯式給湯機は、特に第１から第４の発明において、酸素運転中は、浴槽
へ供給される湯水の温度に上限値を設けることにより、酸素運転中は、入浴者は酸素に直接当たりながら入浴することができ、酸素入浴中に追い焚き運転が開始しても、上限値以上の湯水が供給されないので、酸素に直接当たりながら安全に酸素入浴を行うことができる。
The hot water storage type water heater according to the fifth aspect of the present invention is the first to fourth aspects of the invention. In particular, during the oxygen operation, by setting an upper limit value for the temperature of the hot water supplied to the bathtub, It is possible to take a bath while directly hitting oxygen, and even if the chasing operation is started during the bathing of oxygen, since hot water above the upper limit value is not supplied, it is possible to safely perform the bathing of oxygen while directly hitting oxygen.
以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.
（実施の形態１）
図１は、本実施の形態における風呂追い焚き機能の付いた貯湯式給湯機の構成図である。図１において、本実施の形態の貯湯式給湯機は、タンクユニット１とヒートポンプユニット２を備えており、タンクユニット１内に配設している貯湯タンク３内に貯える高温水を、ヒートポンプユニット２にて生成している。なお、本実施の形態では加熱手段としてヒートポンプを用いているが、これに限定されることなく、例えば、タンク内に電気ヒーターを内設して加熱する形態であっても問題はない。また、実線矢印は流体の流れる方向を示している。
(Embodiment 1)
FIG. 1 is a configuration diagram of a hot-water storage type water heater with a bath reheating function according to the present embodiment. In FIG. 1, the hot water storage type water heater of the present embodiment includes a tank unit 1 and a heat pump unit 2, and heat pump unit 2 stores high-temperature water stored in a hot water storage tank 3 disposed in the tank unit 1. It is generated by. In the present embodiment, a heat pump is used as the heating means. However, the present invention is not limited to this. For example, there is no problem even if an electric heater is provided in the tank for heating. Moreover, the solid line arrow has shown the direction through which the fluid flows.
次に、ヒートポンプユニット２の構成について説明する。ヒートポンプユニット２は、水冷媒熱交換器２４、圧縮機２５、蒸発器２６、膨張弁２７を冷媒配管により順次環状に接続して構成されており、冷媒には二酸化炭素を使用しているため、高圧側が臨界圧力を超えるので、水冷媒熱交換器２４を流通する水に熱を奪われて温度が低下しても凝縮することがなく、水冷媒熱交換器で冷媒と水との間で温度差を形成しやすくなり、高温の湯が得られ、かつ熱交換効率を高くすることができる。 Next, the configuration of the heat pump unit 2 will be described. The heat pump unit 2 is configured by sequentially connecting a water-refrigerant heat exchanger 24, a compressor 25, an evaporator 26, and an expansion valve 27 in an annular manner through a refrigerant pipe, and uses carbon dioxide as a refrigerant. Since the high pressure side exceeds the critical pressure, the water flowing through the water / refrigerant heat exchanger 24 is deprived of heat and does not condense even if the temperature is lowered. A difference is easily formed, high-temperature hot water can be obtained, and heat exchange efficiency can be increased.
また、比較的安価でかつ安定な二酸化炭素を冷媒に使用しているので、製品コストを抑えるとともに、信頼性を向上させることができる。また、二酸化炭素はオゾン破壊係数がゼロであり、地球温暖化係数も代替冷媒ＨＦＣ−４０７Ｃの約１７００分の１と非常に小さいため、地球環境に優しい製品を提供できる。 In addition, since carbon dioxide, which is relatively inexpensive and stable, is used as the refrigerant, the product cost can be reduced and the reliability can be improved. In addition, carbon dioxide has an ozone depletion coefficient of zero and a global warming coefficient of about 1/700 of the alternative refrigerant HFC-407C, which is very small.
また、ヒートポンプユニット２において、圧縮機２５で冷媒が圧縮され、圧縮機２５から吐出された冷媒が水冷媒熱交換器２４で放熱し、膨張弁２７で減圧されたあと、蒸発器２６で空気から熱を吸収し、ガス状態で再び圧縮機２５に吸入される。なお、圧縮機の能力制御および膨張弁２７の開度制御は、圧縮機２５の吐出側に設けたサーミスタ（図示せず）で検出される吐出冷媒の温度が予め設定された温度を維持するように制御される。また、貯湯タンク３内の湯水は、水ポンプ２８が作動することで、水冷媒熱交換器２４に流入し、冷媒と熱交換を行い、再び貯湯タンク３に戻り、積層状態で貯湯タンク３の上部に高温の湯が貯えられる。 Further, in the heat pump unit 2, the refrigerant is compressed by the compressor 25, the refrigerant discharged from the compressor 25 radiates heat by the water refrigerant heat exchanger 24, is decompressed by the expansion valve 27, and then is discharged from the air by the evaporator 26. The heat is absorbed and sucked into the compressor 25 again in a gas state. The compressor capacity control and the expansion valve 27 opening control are performed so that the temperature of the discharged refrigerant detected by a thermistor (not shown) provided on the discharge side of the compressor 25 is maintained at a preset temperature. Controlled. The hot water in the hot water storage tank 3 flows into the water / refrigerant heat exchanger 24 by the operation of the water pump 28, exchanges heat with the refrigerant, returns to the hot water storage tank 3 again, and in the stacked state, Hot water is stored at the top.
次に、タンクユニット１の構成について説明する。タンクユニット１には前述した通り貯湯タンク３を有しており、貯湯タンク３の底部には給水源から低温水を供給するための給水配管３１が接続されており、常時給水圧がタンク内に掛かっている状態となっている。また、貯湯タンク３の上方部には貯湯タンク内の高温水を出湯するための出湯管３２が接続されており、給湯端末や浴槽へ高温水を供給可能に構成している。 Next, the configuration of the tank unit 1 will be described. As described above, the tank unit 1 has the hot water storage tank 3, and a water supply pipe 31 for supplying low temperature water from a water supply source is connected to the bottom of the hot water storage tank 3, so that the water supply pressure is constantly in the tank. It is in a hanging state. In addition, a hot water discharge pipe 32 for discharging hot water in the hot water storage tank 3 is connected to an upper portion of the hot water storage tank 3 so that high temperature water can be supplied to a hot water supply terminal and a bathtub.
次に、給湯端末へ湯が供給される給湯回路について説明する。 Next, a hot water supply circuit for supplying hot water to the hot water supply terminal will be described.
本実施の形態における給湯回路は、給水配管３１から分岐した端末給水配管３３と、出湯管３２とを電動式混合弁４にて接続し、所望の温度の湯が生成可能に構成されている。そして電動式混合弁４の下流側に設けた温度センサ４１で検出される温度が、台所や浴室に設けられたリモコン装置で設定した温度となるように、電動式混合弁４の混合比が変更
される。そして、所望の温度に混合された湯水は、給湯端末４２へ供給される。
The hot water supply circuit in the present embodiment is configured such that hot water having a desired temperature can be generated by connecting the terminal water supply pipe 33 branched from the water supply pipe 31 and the hot water discharge pipe 32 with the electric mixing valve 4. The mixing ratio of the electric mixing valve 4 is changed so that the temperature detected by the temperature sensor 41 provided on the downstream side of the electric mixing valve 4 becomes the temperature set by the remote control device provided in the kitchen or bathroom. Is done. Then, the hot water mixed at a desired temperature is supplied to the hot water supply terminal 42.
次に、浴槽５への湯張り回路および追い焚き回路について説明する。 Next, a hot water filling circuit and a reheating circuit for the bathtub 5 will be described.
本実施の形態では、浴槽５内の湯水と、貯湯タンク３内の高温水とが追い焚き熱交換器６にて熱交換し、浴槽内の湯水を追い焚きする追い焚き機能を有している。そのため、追い焚き熱交換器６の高温側回路は、貯湯タンク３内の高温水が供給されるように構成されており、熱交換した後の温水を貯湯タンク３の下方部へ戻すように構成されている。また、追い焚き熱交換器６の低温側回路は、浴槽５内の湯水が供給されるように構成されており、熱交換した後の浴槽水を、再度浴槽５へ戻すように構成されている。 In the present embodiment, the hot water in the bathtub 5 and the high-temperature water in the hot water storage tank 3 exchange heat with the heat exchanger 6 and have a reheating function for reheating the hot water in the bathtub. . Therefore, the high temperature side circuit of the reheating heat exchanger 6 is configured to be supplied with the high temperature water in the hot water storage tank 3, and is configured to return the hot water after heat exchange to the lower part of the hot water storage tank 3. Has been. Moreover, the low temperature side circuit of the reheating heat exchanger 6 is configured to be supplied with hot water in the bathtub 5, and is configured to return the bathtub water after the heat exchange to the bathtub 5 again. .
高温側回路においては、追い焚きポンプ７および追い焚き熱交換器６の下流側に高温側出口温度検出手段である温度センサ７１が配設されており、追い焚きポンプ７が駆動することによって貯湯タンク３内の高温水が、追い焚き熱交換器６へ搬送される。 In the high temperature side circuit, a temperature sensor 71 as a high temperature side outlet temperature detecting means is disposed downstream of the reheating pump 7 and the reheating heat exchanger 6, and the reheating pump 7 is driven to drive the hot water storage tank. The hot water in 3 is conveyed to the reheating heat exchanger 6.
そして、浴槽５のアダプタ５１とタンクユニット１とは、接続部６０ａ〜６０ｄにおいて、戻り接続管６１および往き接続管６２で接続される。また、戻り接続管６１および往き接続管６２の接続口から追い焚き熱交換器６までは、それぞれ戻り配管６３および往き配管６４で接続されており、浴槽５、戻り接続管６１、戻り配管６３、追い焚き熱交換器６、往き配管６４、往き接続管６２が順次接続されて追い焚き回路が構成されている。 And the adapter 51 of the bathtub 5 and the tank unit 1 are connected by the return connection pipe 61 and the forward connection pipe 62 in the connection parts 60a-60d. The return connection pipe 61 and the forward connection pipe 62 are connected to the reheating heat exchanger 6 by a return pipe 63 and a forward pipe 64, respectively. The bathtub 5, the return connection pipe 61, the return pipe 63, The reheating heat exchanger 6, the outgoing pipe 64, and the outgoing connecting pipe 62 are sequentially connected to constitute a reheating circuit.
また、貯湯タンク３から浴槽５への湯水の供給を行う湯張り回路は、出湯管３２から分岐した風呂給湯管３４と、給水配管３１から分岐した風呂給水配管３５とを電動式混合弁８にて接続し、所望の温度の湯が生成可能に構成されている。そして電動式混合弁８の下流側に設けた温度センサ８１で検出される温度が、台所や浴室に設けられたリモコン装置で設定した温度となるように、電動式混合弁８の混合比が変更される。そして、所望の温度に混合された湯水は、浴槽５へ供給される。 The hot water filling circuit for supplying hot water from the hot water storage tank 3 to the bathtub 5 includes a bath hot water supply pipe 34 branched from the hot water supply pipe 32 and a bath water supply pipe 35 branched from the water supply pipe 31 to the electric mixing valve 8. And hot water having a desired temperature can be generated. The mixing ratio of the electric mixing valve 8 is changed so that the temperature detected by the temperature sensor 81 provided on the downstream side of the electric mixing valve 8 becomes the temperature set by the remote control device provided in the kitchen or bathroom. Is done. Then, the hot water mixed at a desired temperature is supplied to the bathtub 5.
また湯張り回路には、流量センサ８２が設けられており、浴槽５へ供給される湯水の量が計測される。さらに、二方向の電磁弁８３が設けられており、湯張り開始時には、電磁弁８３が開くと同時に、浴槽５への湯水の供給が開始される。そして電磁弁８３が開いた後には、戻り配管６３および往き配管６４の二方向から浴槽５へと湯張りが行われる。また、汚水の逆流を防ぐための逆止手段８４が設けられている。 Moreover, the flow rate sensor 82 is provided in the hot water filling circuit, and the amount of hot water supplied to the bathtub 5 is measured. Further, a two-way electromagnetic valve 83 is provided, and at the start of hot water filling, the supply of hot water to the bathtub 5 is started simultaneously with opening of the electromagnetic valve 83. After the electromagnetic valve 83 is opened, hot water filling is performed from two directions of the return pipe 63 and the forward pipe 64 to the bathtub 5. In addition, a check means 84 is provided for preventing the backflow of sewage.
また、戻り配管６３には、浴槽５内の湯水を循環させるための搬送手段である風呂ポンプ６５、浴槽５内の水位を検出する水位センサ６６、浴槽５内の湯水の温度を検出する浴槽温度検出手段である温度センサ６７が設けられており、風呂ポンプ６５が駆動することにより、浴槽５内の湯水が戻り配管６３に吸い込まれ、追い焚き熱交換器６を経て、往き配管６４へ流れ込み、再度浴槽５へ戻される。 The return pipe 63 includes a bath pump 65 that is a conveying means for circulating hot water in the bathtub 5, a water level sensor 66 that detects the water level in the bathtub 5, and a bath temperature that detects the temperature of hot water in the bathtub 5. A temperature sensor 67 as a detection means is provided, and when the bath pump 65 is driven, hot water in the bathtub 5 is sucked into the return pipe 63 and flows into the forward pipe 64 via the reheating heat exchanger 6. It is returned to the bathtub 5 again.
また、風呂ポンプ６５と追い焚き熱交換器６の間には、浴槽５内に湯水があるかどうかを検出する湯水検出手段であるフロースイッチ６８が設けられており、オンすることで水の流れを検知可能に構成されている。つまり、フロースイッチ６８がオンしたときには浴槽５内には湯水があると判断し、フロースイッチ６８がオフの時には浴槽５内には湯水がないと判断される。 In addition, a flow switch 68 is provided between the bath pump 65 and the reheating heat exchanger 6 as hot water detection means for detecting whether there is hot water in the bathtub 5. Can be detected. That is, it is determined that there is hot water in the bathtub 5 when the flow switch 68 is turned on, and it is determined that there is no hot water in the bathtub 5 when the flow switch 68 is turned off.
また、浴室には貯湯式給湯機の操作を行うことができる操作手段であり、浴槽５内の湯水の保温温度を設定する温度設定手段であるリモコン装置９が設置され、リモコン装置９を操作して、湯水の温度設定や風呂への湯張り、また設置工事後の試運転操作等を行う。リモコン装置９には情報を表示する表示部９１および操作を行う操作部９２を有している
。なお、図１には図示していないが、本実施の形態の貯湯式給湯機には、リモコン装置９からの指示を受け取り、各制御機器に命令する制御装置９４も有している。そして制御装置９４はマイコンおよびその電子制御部品で構成され、タンクユニット１を構成する機器に命令を送っている。
In addition, a remote control device 9 is installed in the bathroom, which is an operation means that can operate the hot water storage type hot water heater, and is a temperature setting means for setting the temperature of hot water in the bathtub 5, and the remote control device 9 is operated. Then, set the temperature of the hot water, fill the bath, and perform the trial run after installation. The remote control device 9 has a display unit 91 for displaying information and an operation unit 92 for performing operations. Although not shown in FIG. 1, the hot water storage type water heater of the present embodiment also includes a control device 94 that receives an instruction from the remote control device 9 and commands each control device. The control device 94 is composed of a microcomputer and its electronic control parts, and sends commands to the devices constituting the tank unit 1.
さらに、本発明のリモコン装置９には、人体検出手段９３が設けられており、人が浴室に入室したことを検知することができるようになっている。なお人体検出手段９３には、赤外線センサや、浴室内の照度を検出する照度センサ、また入室者の振動やドアの開閉を検出する衝撃（振動）センサなど様々なセンサを用いることができ、種類が特定されるものではない。 Furthermore, the remote control device 9 of the present invention is provided with a human body detection means 93 so that it can detect that a person has entered the bathroom. The human body detecting means 93 can be various sensors such as an infrared sensor, an illuminance sensor that detects the illuminance in the bathroom, and an impact (vibration) sensor that detects the vibration of the occupant and the opening and closing of the door. Is not specified.
例えば、赤外線センサの場合には、周囲の温度状況から温度変化があった場合には人が検出されたと認識し、照度センサの場合には、浴室の照明の照度を検出した場合には人が入ってくると推定し、衝撃センサの場合には、所定時間の間、衝撃センサからの出力を検出した場合には、入室者ありと判断するようにする。また、これらのセンサを複数個組み合わせることも可能である。 For example, in the case of an infrared sensor, it is recognized that a person has been detected if there is a temperature change from the surrounding temperature situation, and in the case of an illuminance sensor, if the illuminance of bathroom lighting is detected, the person In the case of an impact sensor, if an output from the impact sensor is detected for a predetermined time, it is determined that there is a person entering the room. It is also possible to combine a plurality of these sensors.
また、本実施の形態の場合には、人体検出手段９３をリモコン装置９に設けた構成としたが、これに限定されることはなく、例えば、衝撃センサの場合、浴室に隣接した脱衣所の床裏側に設置したり、浴室のドア表面に設置したりして、振動を検知する方法であったり、さらには、浴室照明のスイッチを人体検出手段とした場合には、浴室照明のスイッチをオンにしたときに人体を検出するものとしてもよい。 Further, in the case of the present embodiment, the human body detecting means 93 is provided in the remote control device 9, but the present invention is not limited to this. For example, in the case of an impact sensor, a dressing room adjacent to the bathroom. When it is installed behind the floor or installed on the door surface of the bathroom to detect vibrations, and when the bathroom lighting switch is used as a human body detection means, the bathroom lighting switch is turned on. It is good also as what detects a human body when it makes it.
また、本実施の形態の貯湯式給湯機には、外気中から酸素を取り出す酸素富化装置９５が設けられており、酸素富化膜を介し、片方を真空ポンプにより減圧すると酸素濃度を高めた空気を取り出すことができ、酸素富化装置９５から酸素供給配管９６を介して浴槽５へ供給される。また、酸素供給配管９６の端部は、追い焚き運転時追い焚き熱交換器６から浴槽５へ湯水が流れ込む側の配管へ接続されており、浴槽５へ酸素を供給する酸素運転中は常時風呂ポンプ６５を駆動させて、浴槽５内の湯水を循環させている。 Further, the hot water storage type hot water supply apparatus of the present embodiment is provided with an oxygen enrichment device 95 that extracts oxygen from the outside air, and when one side is decompressed by a vacuum pump through an oxygen enriched film, the oxygen concentration is increased. Air can be taken out and supplied from the oxygen enricher 95 to the bathtub 5 through the oxygen supply pipe 96. Further, the end of the oxygen supply pipe 96 is connected to a pipe on the side where hot water flows from the reheating heat exchanger 6 to the bathtub 5 during the reheating operation, and a bath is always provided during the oxygen operation for supplying oxygen to the bathtub 5. The pump 65 is driven to circulate hot water in the bathtub 5.
また、本実施の形態では追い焚き熱交換器６で加熱された後の浴槽水の温度を検出する追い焚き出湯温度検出手段である温度センサ６９が設けられている。この温度センサ６９は浴槽５へ送る湯水の温度を検出しており、温度センサ６９で検出される温度が上限温度を超えないように追い焚きポンプ７が制御される。これは温度センサ６９では、浴槽５へ直接供給される湯水の温度を検出することができるため、浴槽５へ上限温度以上の高温水を供給することがないようにして、入浴者の火傷を防止することができる。 Moreover, in this Embodiment, the temperature sensor 69 which is the reheating hot water temperature detection means which detects the temperature of the bath water after being heated with the reheating heat exchanger 6 is provided. This temperature sensor 69 detects the temperature of the hot water sent to the bathtub 5, and the reheating pump 7 is controlled so that the temperature detected by the temperature sensor 69 does not exceed the upper limit temperature. This is because the temperature sensor 69 can detect the temperature of the hot water supplied directly to the bathtub 5, so that hot water having a temperature higher than the upper limit temperature is not supplied to the bathtub 5 to prevent the bather from being burned. can do.
本実施の形態では、酸素運転中と酸素運転停止中の２つの状況に応じて上限温度を変更しており、酸素運転中の上限温度は、酸素運転停止中の上限温度よりも低い値に設定している。ただし、上限温度を２種類に限定する必要はなく、酸素運転の有無と浴槽５内の湯水温度との関係式を設けて、その関係式に従って、無段階に上限温度を変更して決定しても良い。 In the present embodiment, the upper limit temperature is changed according to two situations during the oxygen operation and when the oxygen operation is stopped, and the upper limit temperature during the oxygen operation is set to a value lower than the upper limit temperature during the oxygen operation stop. doing. However, it is not necessary to limit the upper limit temperature to two types, and a relational expression between the presence or absence of oxygen operation and the hot water temperature in the bathtub 5 is provided, and the upper limit temperature is changed steplessly according to the relational expression. Also good.
次に、浴槽５への酸素供給回路について説明する。リモコン装置９には酸素開始手段である酸素スイッチ９７が設けられており、酸素スイッチ９７を押下することで酸素運転の開始および停止を行う。酸素運転中は、表示部９１に酸素運転中であることを表示し、使用者が酸素運転中であることを認識することができる。酸素富化装置９５では、真空ポンプを駆動して酸素富化膜から酸素濃度を高めた空気を抽出し、アダプタ５１の浴槽への往き側継手に酸素供給配管９６を接続している。酸素運転時は、酸素富化装置９５を運転して酸素を抽出し、酸素供給配管９６へ送るのと合せて、風呂循環ポンプ６５を運転して、
酸素供給管９６に供給された酸素をアダプタ５１から浴槽５へ噴出させる。
Next, an oxygen supply circuit to the bathtub 5 will be described. The remote control device 9 is provided with an oxygen switch 97 which is an oxygen starting means, and the oxygen operation is started and stopped by pressing the oxygen switch 97. During the oxygen operation, it is displayed on the display unit 91 that the oxygen operation is in progress, and the user can recognize that the oxygen operation is in progress. In the oxygen enrichment device 95, a vacuum pump is driven to extract air with an increased oxygen concentration from the oxygen enriched film, and an oxygen supply pipe 96 is connected to the joint on the outgoing side of the adapter 51 to the bathtub. At the time of the oxygen operation, the oxygen enrichment device 95 is operated to extract oxygen and sent to the oxygen supply pipe 96, and the bath circulation pump 65 is operated,
Oxygen supplied to the oxygen supply pipe 96 is jetted from the adapter 51 to the bathtub 5.
以上のように構成された貯湯式給湯機において、まず、貯湯式給湯機の湯張り運転について説明する。 In the hot water storage type water heater configured as described above, first, the hot water filling operation of the hot water storage type water heater will be described.
使用者がリモコン装置９を操作し湯張り運転を開始するか、もしくは予め湯張り運転の予約をしていた場合には設定した時刻になると湯張り運転が開始される。湯張り運転が開始すると、電磁弁８３が開弁し、貯湯タンク３からの高温水が電動式混合弁８で設定温度となるように混合され、浴槽５へ供給される。 When the user operates the remote control device 9 to start the hot water filling operation, or when the hot water filling operation is reserved in advance, the hot water filling operation is started at the set time. When the hot water filling operation is started, the electromagnetic valve 83 is opened, and high temperature water from the hot water storage tank 3 is mixed by the electric mixing valve 8 so as to reach a set temperature, and supplied to the bathtub 5.
電動式混合弁８から出湯される湯は、戻り配管６３および往き配管６４の二方向に分岐され、浴槽５へ湯水が供給される。また湯張り量は、流量センサ８２で検出し、設定した湯量を流量センサ８２で検出すると、電磁弁８３を閉弁し、湯張り運転を終了する。 Hot water discharged from the electric mixing valve 8 is branched in two directions, a return pipe 63 and an outgoing pipe 64, and hot water is supplied to the bathtub 5. Further, the amount of hot water filling is detected by the flow rate sensor 82, and when the set amount of hot water is detected by the flow rate sensor 82, the electromagnetic valve 83 is closed and the hot water filling operation is terminated.
なお、湯張り運転時において、電動式混合弁８で混合される湯水の温度は、リモコン装置９で設定した湯の温度よりも、数度高い温度としてもよい。これは電動式混合弁８で混合した湯が、浴槽５に行くまでの間の給湯配管を流れる時に放熱してしまい、浴槽５に注湯されるときには温度低下が生じてしまう可能性があるからである。そのため、電動式混合弁８で混合する湯水の温度を設定温度よりも高く設定しておくことで、配管での放熱を考慮した湯張り運転が可能となる。 Note that the temperature of the hot water mixed by the electric mixing valve 8 during the hot water filling operation may be several degrees higher than the temperature of the hot water set by the remote control device 9. This is because the hot water mixed by the electric mixing valve 8 dissipates heat when flowing through the hot water supply pipe until it goes to the bathtub 5, and when the hot water is poured into the bathtub 5, the temperature may decrease. It is. For this reason, by setting the temperature of the hot water mixed by the electric mixing valve 8 to be higher than the set temperature, it is possible to perform a hot water filling operation in consideration of heat radiation in the piping.
次に、本発明の貯湯式給湯機のリモコン装置９には、人体検出手段９３を備えており、湯張り運転終了後は、人体検出手段９３を用いた自動追い焚き運転を行う場合と、人体検出手段９３の機能をオフにして自動追い焚き運転を行う場合とがある。まず、人体検出手段９３の機能をオフにした自動追い焚き運転について説明する。 Next, the remote control device 9 of the hot water storage type hot water heater of the present invention is provided with the human body detecting means 93, and after the hot water filling operation is completed, when the automatic chasing operation using the human body detecting means 93 is performed, There are cases in which the function of the detecting means 93 is turned off to perform an automatic chasing operation. First, the automatic chasing operation in which the function of the human body detecting means 93 is turned off will be described.
本実施の形態において人体検出手段９３の機能をオフにした場合、湯張り運転終了後は自動追い焚き運転を行う。自動追い焚き運転では、湯張り運転終了後から第１の所定時間（△Ｌ１）が経過する毎に、風呂ポンプ６５を駆動し、浴槽５内の湯水を戻り配管６３および往き配管６４を循環させて、温度センサ６７で浴槽５内の湯水の温度を検出する。例えば、第１の所定時間（△Ｌ１）を１５分に設定しておくと、湯張り運転終了後から１５分毎に風呂ポンプ６５が駆動して温度検出を行う。 In the present embodiment, when the function of the human body detecting means 93 is turned off, the automatic chasing operation is performed after the hot water filling operation. In the automatic reheating operation, the bath pump 65 is driven and the hot water in the bathtub 5 is circulated through the return pipe 63 and the forward pipe 64 every time the first predetermined time (ΔL1) has elapsed since the end of the hot water filling operation. Thus, the temperature sensor 67 detects the temperature of the hot water in the bathtub 5. For example, if the first predetermined time (ΔL1) is set to 15 minutes, the bath pump 65 is driven every 15 minutes after the hot water filling operation is completed to detect the temperature.
そして、第１の所定時間毎に風呂ポンプ６５を所定時間α（例えば、４５秒間）の間駆動して、浴槽５内の湯水の温度を検出した結果、浴槽５内の湯水の温度が所定温度Ｔｓ（追い焚き開始温度）以下になったことを検出したら、追い焚き運転を開始し、追い焚きポンプ７および風呂ポンプ６５を駆動して、追い焚き熱交換器６にて貯湯タンク３内の高温水と、浴槽５内の湯水とが熱交換を行い、浴槽５内の湯水の追い焚きを行う。そして、浴槽５内の湯水の温度が所定温度Ｔｗ（追い焚き停止温度）になった時に追い焚き運転が停止し、追い焚き運転完了となる。 Then, as a result of detecting the temperature of the hot water in the bathtub 5 by driving the bath pump 65 for a predetermined time α (for example, 45 seconds) every first predetermined time, the temperature of the hot water in the bathtub 5 is a predetermined temperature. When it is detected that the temperature is equal to or lower than Ts (reheating start temperature), the reheating operation is started, the reheating pump 7 and the bath pump 65 are driven, and the reheating heat exchanger 6 causes the high temperature in the hot water storage tank 3 to rise. The water and hot water in the bathtub 5 exchange heat, and replenish the hot water in the bathtub 5. Then, when the temperature of the hot water in the bathtub 5 reaches a predetermined temperature Tw (reheating stop temperature), the reheating operation is stopped and the reheating operation is completed.
図２は、通常時の追い焚き運転のフローチャートである。図２に示すように、追い焚き運転終了後、第１の所定時間（△Ｌ１）が経過した時間Ｌｍａでまず風呂ポンプ６５を駆動して浴槽５内の湯水の温度を検出する。図２の場合には時間Ｌｍａでは未だ浴槽５内の湯水の温度が所定温度Ｔｓを下回っていないので、さらに第１の所定時間（△Ｌ１）が経過した時間Ｌｍｂで再度風呂ポンプ６５を駆動して浴槽５内の湯水の温度を検出する。その結果、時間Ｌｍｂでは所定温度Ｔｓを下回っているので、追い焚きポンプ７の駆動を開始し、追い焚きポンプ７および風呂ポンプ６５を駆動して浴槽５内の湯水の追い焚き運転を開始する。 FIG. 2 is a flowchart of the reheating operation at the normal time. As shown in FIG. 2, after the chasing operation is finished, the bath pump 65 is first driven at the time Lma when the first predetermined time (ΔL1) has elapsed, and the temperature of the hot water in the bathtub 5 is detected. In the case of FIG. 2, since the temperature of the hot water in the bathtub 5 has not yet fall below the predetermined temperature Ts at the time Lma, the bath pump 65 is driven again at the time Lmb when the first predetermined time (ΔL1) has passed. The temperature of hot water in the bathtub 5 is detected. As a result, since it is below the predetermined temperature Ts at time Lmb, the driving of the reheating pump 7 is started, and the reheating pump 7 and the bath pump 65 are driven to start the reheating operation of the hot water in the bathtub 5.
そして、浴槽５内の湯水の温度が所定温度Ｔｗ（追い焚き終了温度）になったら、追い焚き運転を終了する。図２の場合には、時間Ｌｍｃまで追い焚き運転が行われたことになり、追い焚き運転終了後、時間Ｌｍｃから第１の所定時間毎に浴槽５内の湯水の温度を検出することになる。このとき追い焚き終了温度で設定している所定温度Ｔｗは、リモコン装置９で設定した保温温度Ｔ１よりも少し高めの温度を設定しており、本実施の形態では所定温度Ｔｗ＝保温温度Ｔ１＋０．５℃の関係を有している。 Then, when the temperature of the hot water in the bathtub 5 reaches a predetermined temperature Tw (reheating end temperature), the reheating operation is ended. In the case of FIG. 2, the chasing operation is performed until the time Lmc, and after the chasing operation, the temperature of the hot water in the bathtub 5 is detected every first predetermined time from the time Lmc. . At this time, the predetermined temperature Tw set as the reheating end temperature is set to a temperature slightly higher than the heat retention temperature T1 set by the remote control device 9, and in this embodiment, the predetermined temperature Tw = the heat retention temperature T1 + 0. It has a relationship of 5 ° C.
なお、人体検出手段９３の機能をオフにした自動追い焚き運転では、図２に示すように第１の所定時間毎（時間Ｌｍａ、時間Ｌｍｂ、時間Ｌｍｄ、時間Ｌｍｅ）に温度低下している。これは風呂ポンプ６５を駆動することによって、戻り接続管６１、往き接続管６２、戻り配管６３、往き配管６４内の冷えた湯水が浴槽５へ供給されることによるものである。そのため、浴槽５からの単純な放熱に加えて、浴槽５内の湯水の温度を検出するために風呂ポンプ６５を駆動することによって、浴槽５内へ冷水を供給して浴槽５内の湯水の温度を低下させている。 In the automatic chasing operation in which the function of the human body detecting means 93 is turned off, the temperature is decreased every first predetermined time (time Lma, time Lmb, time Lmd, time Lme) as shown in FIG. This is because the hot water in the return connection pipe 61, the forward connection pipe 62, the return pipe 63, and the forward pipe 64 is supplied to the bathtub 5 by driving the bath pump 65. Therefore, in addition to simple heat radiation from the bathtub 5, by driving the bath pump 65 to detect the temperature of the hot water in the bathtub 5, the cold water is supplied into the bathtub 5 and the temperature of the hot water in the bathtub 5 is detected. Is reduced.
次に、酸素運転停止中であり、かつ、人体検出手段９３の機能をオンにしている時の自動追い焚き運転機能について説明する。なお、人体検出手段９３の機能のオン・オフの切り替えは、リモコン装置９で所定の操作を行うことによって可能となっている。 Next, the automatic recharging operation function when the oxygen operation is stopped and the function of the human body detection means 93 is turned on will be described. The function of the human body detecting means 93 can be switched on and off by performing a predetermined operation with the remote control device 9.
図３は、人体検出手段９３の機能をオンにしている時の不在時の追い焚き運転のフローチャートである。図３に示すように、人体検出手段９３の機能をオンにしているときであっても、湯張り運転完了後には第２の所定時間毎に風呂温度を検出するようにしている。これは、風呂温度を定期的に検出しなければ、浴槽５内の湯水の温度低下が時間とともに進行し、使用者が自動追い焚き運転を設定しているにもかかわらず、浴槽５内の湯水が冷めてしまい、水になってしまいかねないためである。 FIG. 3 is a flowchart of the chasing operation in the absence when the function of the human body detecting means 93 is turned on. As shown in FIG. 3, even when the function of the human body detection means 93 is turned on, the bath temperature is detected every second predetermined time after the hot water filling operation is completed. If the bath temperature is not detected regularly, the temperature drop of the hot water in the bathtub 5 progresses with time, and the hot water in the bathtub 5 is set even though the user has set the automatic reheating operation. This is because it may cool down and become water.
本発明では、第２の所定時間（△Ｌ２）毎に風呂ポンプ６５を所定時間α（例えば、４５秒間）の間駆動して風呂温度を検出している。しかしながら、第２の所定時間（△Ｌ２）は、人体検出手段９３の機能をオフ時の追い焚き運転の風呂ポンプ６５を駆動するタイミングの第１の所定時間（△Ｌ１）よりも長い時間を設定している。第１の所定時間と第２の所定時間とを比較するために、図３には、人体検出手段９３の機能をオフにしている時の自動追い焚き運転のフローも２点鎖線で示している。 In the present invention, the bath temperature is detected by driving the bath pump 65 for a predetermined time α (for example, 45 seconds) every second predetermined time (ΔL2). However, the second predetermined time (ΔL2) is set to be longer than the first predetermined time (ΔL1) at the timing of driving the bath pump 65 in the chasing operation when the function of the human body detecting means 93 is turned off. doing. In order to compare the first predetermined time and the second predetermined time, FIG. 3 also shows the flow of the automatic chasing operation when the function of the human body detecting means 93 is turned off by a two-dot chain line. .
例えば、第１の所定時間（△Ｌ１）には１５分を設定し、第２の所定時間（△Ｌ２）には３０分を設定することで、人体検出手段９３の機能のオフ時の風呂ポンプ６５の駆動回数よりも、人体検出手段９３の機能をオンにしている時の風呂ポンプ６５の駆動回数を減らすことが出来るため、配管内に残っている冷水を浴槽５へ入れる回数を少なくすることができる。なお、第１の所定時間（△Ｌ１）および第２の所定時間（△Ｌ２）に設定する時間は、本実施の形態に示す６０分、１５分に限定されるものではない。 For example, by setting 15 minutes for the first predetermined time (ΔL1) and setting 30 minutes for the second predetermined time (ΔL2), the bath pump when the function of the human body detecting means 93 is off is set. Since the number of times the bath pump 65 is driven when the function of the human body detecting means 93 is turned on can be reduced from the number of times the 65 is driven, the number of times cold water remaining in the pipe is put into the bathtub 5 can be reduced. Can do. The time set for the first predetermined time (ΔL1) and the second predetermined time (ΔL2) is not limited to 60 minutes and 15 minutes shown in the present embodiment.
そして人体検出手段９３の機能をオンにしているときであっても、第２の所定時間（△Ｌ２）毎に風呂温度を検出した結果、風呂温度が所定温度Ｔｓ（追い焚き開始温度）以下になったときには、風呂ポンプ６５および追い焚きポンプ７を駆動して、所定温度Ｔｗ（追い焚き終了温度）まで、加熱能力を「小」に設定して、浴槽５内の湯水の追い焚きを行うものとする。 Even when the function of the human body detecting means 93 is turned on, the bath temperature is detected to be equal to or lower than the predetermined temperature Ts (reheating start temperature) as a result of detecting the bath temperature every second predetermined time (ΔL2). When this happens, the bath pump 65 and the reheating pump 7 are driven so that the heating capacity is set to “small” until the predetermined temperature Tw (reheating end temperature) and the hot water in the bathtub 5 is reheated. And
上述の人体検出手段９３の機能をオンにしている時の不在時の追い焚き運転のフローを図３を用いて説明する。追い焚き運転終了後、第２の所定時間（△Ｌ２）毎に風呂ポンプ６５を駆動して浴槽５内の温度を検出している。図３では、湯張り運転終了後、第２の所定時間（△Ｌ２）が経過した時間Ｌｕａで風呂ポンプ６５を駆動して浴槽５内の湯水の温
度を検出し、所定温度Ｔｗ（追い焚き終了温度）まで追い焚きを行っている。
The flow of the chasing operation in the absence when the function of the human body detecting means 93 is turned on will be described with reference to FIG. After the chasing operation, the bath pump 65 is driven every second predetermined time (ΔL2) to detect the temperature in the bathtub 5. In FIG. 3, after completion of the hot water filling operation, the bath pump 65 is driven at the time Lua when the second predetermined time (ΔL2) has elapsed, and the temperature of the hot water in the bathtub 5 is detected, and the predetermined temperature Tw (end of reheating) is reached. (Temperature).
また、本実施の形態では、人体検出手段９３の機能がオンの時であって、人が不在時の場合に第２の所定時間（△Ｌ２）毎に風呂ポンプ６５を駆動して浴槽５内の湯水の温度を検出し、所定温度Ｔｓよりも低くなっている場合に追い焚き運転を行っているが、この時、浴槽５内の湯水の温度が何度であっても、必ず追い焚きポンプ７を駆動して浴槽５内の湯水の温度を所定温度Ｔｗ（追い焚き終了温度）まで追い焚き運転を行うようにしてもよい。これは人体検出手段９３の機能がオフの時に比べて、風呂ポンプ６５を駆動する回数が少ないものの、浴槽５内の湯水の温度が放熱によってある程度低下していることが予想されるからである。 In the present embodiment, the bath pump 65 is driven every second predetermined time (ΔL2) when the function of the human body detecting means 93 is on, and the person is absent. The temperature of the hot water is detected and the reheating operation is performed when the temperature is lower than the predetermined temperature Ts. At this time, the reheating pump is always used regardless of the temperature of the hot water in the bathtub 5. 7 may be driven so that the temperature of the hot and cold water in the bathtub 5 is changed to a predetermined temperature Tw (reheating end temperature). This is because the temperature of the hot water in the bathtub 5 is expected to decrease to some extent due to heat dissipation, although the number of times of driving the bath pump 65 is smaller than when the function of the human body detection means 93 is off.
なお、本実施の形態では第２の所定時間（△Ｌ２）毎に風呂ポンプ６５を駆動して、浴槽５内の温度を検出しているが、第２の所定時間（△Ｌ２）は一定の時間を設定する他、学習制御等によって設定してもよい。 In the present embodiment, the bath pump 65 is driven every second predetermined time (ΔL2) to detect the temperature in the bathtub 5, but the second predetermined time (ΔL2) is constant. In addition to setting time, it may be set by learning control or the like.
以上のように、浴室に人がいない場合には、人体検出手段９３の機能がオフになっている時に比べて、風呂ポンプ６５を駆動する回数が少ないために、配管内に残っている冷水を浴槽５へ供給して浴槽５内の湯水の温度低下してしまう回数が少なくなるとともに、追い焚き運転の回数も減るため、貯湯タンク３内の高温水を無駄に使用してしまうことがない。 As described above, when there is no person in the bathroom, the number of times that the bath pump 65 is driven is smaller than when the function of the human body detection means 93 is turned off. The number of times that the temperature of the hot water in the bathtub 5 is lowered by being supplied to the bathtub 5 is reduced, and the number of chasing operations is also reduced, so that the hot water in the hot water storage tank 3 is not wasted.
また、浴室に人がいない場合には、すぐに浴槽５内の湯水を追い焚き終了温度Ｔｗまで上昇させなくても入浴者の快適性を損なうわけではなく、急いで追い焚き終了温度Ｔｗまで上昇させる必要がないので、浴槽５内の湯水の温度が何度であっても、加熱能力を変更することなく、本実施の形態では加熱能力が最低の「小」で追い焚きを行っており、貯湯タンク３内の高温湯を、追い焚き熱交換器６で低温まで低くしてから貯湯タンク３の底部に戻すことになるので、加熱手段にヒートポンプを使用した場合には、非常に沸き上げ効率を向上させることができる。 In addition, if there is no person in the bathroom, the hot water in the bathtub 5 is not immediately increased to the end temperature Tw. Therefore, even if the temperature of the hot water in the bathtub 5 is any number of times, the heating capacity is not changed, and in this embodiment, the heating capacity is set to “low” with the lowest heating capacity. The hot water in the hot water storage tank 3 is returned to the bottom of the hot water storage tank 3 after being lowered to a low temperature by the reheating heat exchanger 6, so that when the heat pump is used as the heating means, the boiling efficiency is very high. Can be improved.
次に、入浴者が浴室へ入ってきたときの追い焚き運転について説明する。入浴者が浴室へ入ってきたことを人体検出手段９３が検知すると、まず風呂ポンプ６５を所定時間β（例えば、２秒）だけ駆動し、その後、すぐに追い焚きポンプ７を駆動して追い焚き運転を行う。この時、所定時間βは、上述した所定時間αと、所定時間α＞所定時間βの関係を有しており、風呂ポンプ６５を所定時間βだけ動かすのは、フロースイッチ６８で浴槽５内に湯水があるかどうかを判定するためである。人体検出手段９３の機能をオフにしているときとの相違点は、追い焚き開始のタイミングが異なることである。 Next, the chasing operation when the bather enters the bathroom will be described. When the human body detecting means 93 detects that the bather has entered the bathroom, the bath pump 65 is first driven for a predetermined time β (for example, 2 seconds), and then the reheating pump 7 is immediately driven to retreat. Do the driving. At this time, the predetermined time β has a relationship of the above-mentioned predetermined time α and the predetermined time α> predetermined time β. The bath switch 65 is moved by the predetermined time β in the bathtub 5 by the flow switch 68. This is to determine whether there is hot water. The difference from the case where the function of the human body detecting means 93 is turned off is that the timing of starting the chasing is different.
人体検出手段９３の機能をオフにしているときの追い焚き運転では、第１の所定時間（△Ｌ１）毎に風呂ポンプ６５を所定時間α動かして、まず浴槽５内の湯水の温度を検出する。そして検出した浴槽５内の湯水の温度が、所定温度Ｔｓよりも低いかどうかを判定し、所定温度Ｔｓよりも低い場合に、追い焚きポンプ７を駆動して追い焚き運転を開始する。 In the chasing operation when the function of the human body detection means 93 is turned off, the bath pump 65 is moved by a predetermined time α every first predetermined time (ΔL1), and the temperature of hot water in the bathtub 5 is first detected. . Then, it is determined whether or not the detected temperature of the hot water in the bathtub 5 is lower than the predetermined temperature Ts. When the detected temperature is lower than the predetermined temperature Ts, the reheating pump 7 is driven to start the reheating operation.
また、本実施の形態では、所定時間αを４５秒に設定し、所定時間αの間は風呂ポンプ６５を駆動するようにしている。これは配管内の冷水と浴槽５内の温水とが混ざり浴槽５内の温度が安定するまで、配管と浴槽５内の湯水を循環させるためであり、温度が安定し確定してから追い焚き運転を開始するかどうかを判断している。 In the present embodiment, the predetermined time α is set to 45 seconds, and the bath pump 65 is driven during the predetermined time α. This is because the cold water in the pipe and the hot water in the bathtub 5 are mixed and the hot water in the pipe and the bathtub 5 is circulated until the temperature in the bathtub 5 is stabilized. Judging whether to start.
それに対して、人体検出手段９３の機能をオンにしているときに、人体検出手段９３で浴室への入室を検出すると、風呂ポンプ６５を所定時間β動かして、まず浴槽５内に湯水
があるかどうかをフロースイッチ６８で検出する。そして浴槽５内の湯水の温度を検出する前に追い焚きポンプ７を駆動して追い焚き運転を開始する。これは浴室への入室を検出しており、入室者がまもなく浴槽５へ入ることが予想されるので、浴槽５内に湯水があることさえ確認できれば、すぐに追い焚きポンプ７を駆動して追い焚きを開始して、一刻も早く浴槽５内の湯水を追い焚きしなければならないからである。
On the other hand, when the function of the human body detecting means 93 is turned on and the human body detecting means 93 detects entry into the bathroom, the bath pump 65 is moved by β for a predetermined time, so that there is first hot water in the bathtub 5. Whether it is detected by the flow switch 68. Then, before detecting the temperature of the hot water in the bathtub 5, the reheating pump 7 is driven to start the reheating operation. This detects the entry into the bathroom, and it is expected that the occupant will enter the bathtub 5 soon. Therefore, as long as it can be confirmed that there is hot water in the bathtub 5, the reheating pump 7 is immediately driven to follow. This is because it is necessary to start hot water and chase the hot water in the bathtub 5 as soon as possible.
また所定時間βの間にフロースイッチ６８で浴槽５内の湯水の存在が確認できなければ、追い焚きポンプ７の駆動は開始させない。これは湯水が無い時に追い焚きポンプを駆動させた場合には、追い焚き熱交換器にて浴槽内の湯水と熱交換されないために、貯湯タンクの底部に高温水を供給してしまうので、浴槽５内に湯水が無い場合には追い焚きポンプ７の駆動を停止して無駄な高温水の使用を防止することができる。 If the presence of hot water in the bathtub 5 cannot be confirmed by the flow switch 68 during the predetermined time β, the driving of the reheating pump 7 is not started. This is because if the reheating pump is driven when there is no hot water, the reheating heat exchanger does not exchange heat with the hot water in the bathtub, so hot water is supplied to the bottom of the hot water storage tank. When there is no hot water in 5, driving of the reheating pump 7 can be stopped to prevent use of useless high temperature water.
また、本実施の形態では所定時間βを２秒に設定し、所定時間βの間、風呂ポンプ６５を駆動させている。所定時間αに比べて所定時間βを短くするのは、フロースイッチ６８で水があることさえ確認できればいいためである。この場合、追い焚きポンプ７を駆動させながら、浴槽５内の温度を確定することになるが、浴槽５内の湯水の温度をより早く上昇させることができる。以上より、所定時間α＞所定時間βの関係を有することになる。 In the present embodiment, the predetermined time β is set to 2 seconds, and the bath pump 65 is driven for the predetermined time β. The reason why the predetermined time β is made shorter than the predetermined time α is that it is sufficient that the flow switch 68 can confirm that there is water. In this case, the temperature in the bathtub 5 is determined while driving the reheating pump 7, but the temperature of the hot water in the bathtub 5 can be increased more quickly. As described above, the relationship of the predetermined time α> the predetermined time β is established.
また、上述したように人体検出手段９３の機能をオンにしているときであっても、人の不在時には第２の所定時間（△Ｌ２）毎に風呂ポンプ６５を所定時間αだけ駆動して、浴槽５内の温度を検出し、その結果、所定温度Ｔｓ（追い焚き開始温度）よりも低い場合には追い焚き運転を行っており、人体検出手段９３の機能をオンにしているときの人が不在時と、入室を検出した時の追い焚きポンプ７の駆動のタイミングも異なっている。 Further, even when the function of the human body detection means 93 is turned on as described above, the bath pump 65 is driven for a predetermined time α every second predetermined time (ΔL2) when a person is absent, The temperature in the bathtub 5 is detected, and as a result, when the temperature is lower than the predetermined temperature Ts (restarting start temperature), the reheating operation is performed, and the person when the function of the human body detecting means 93 is turned on The driving timing of the reheating pump 7 when the absence is detected is different from that when the room is detected.
このように、人体検出手段９３の機能をオンにしている時の人が不在時の追い焚き運転時や、人体検出手段９３の機能をオフにしている時の自動追い焚き運転時の追い焚きポンプ７の駆動するタイミングに比べて、人体検出手段９３の機能をオンにしているときに入室を検知した時に行う追い焚き運転時の追い焚きポンプ７の駆動を開始するタイミング（風呂ポンプ６５を駆動してから追い焚きポンプ７の駆動を開始するタイミング）を短くすることによって、人体を検出してから浴槽５内の湯水の温度上昇を早めることができる。 In this way, a reheating pump at the time of the chasing operation when the function of the human body detecting means 93 is turned on when the person is absent or at the time of the automatic chasing operation when the function of the human body detecting means 93 is turned off. Compared with the timing of driving 7, the timing of starting the driving of the reheating pump 7 during the reheating operation that is performed when entering the room is detected when the function of the human body detecting means 93 is turned on (the bath pump 65 is driven). By shortening the timing at which the driving of the chasing pump 7 is started after that, the temperature rise of the hot water in the bathtub 5 can be accelerated after the human body is detected.
図４は人体検出手段９３の機能をオンにしているときの追い焚き運転のフローチャートである。なお、人体検出手段９３の機能をオンにしているときの不在時の追い焚き運転のフローチャートと比較できるように、人体検出手段９３の機能をオンで、かつ浴室内に人が不在の時の自動追い焚き運転のチャートを１点鎖線にて示している。 FIG. 4 is a flowchart of the chasing operation when the function of the human body detecting means 93 is turned on. It should be noted that the automatic operation when the function of the human body detecting means 93 is on and no person is present in the bathroom so that it can be compared with the flowchart of the chasing operation in the absence when the function of the human body detecting means 93 is on. The chart of the chasing operation is shown by a one-dot chain line.
図４に示すように、第２の所定時間（△Ｌ２）が経過するまでに、時間Ｌｎａで浴室への入室があった場合には、時間Ｌｎａにて、まず風呂ポンプ６５を所定時間β動かし、その後、追い焚きポンプ７を駆動して追い焚き運転を開始する。ここでは、所定時間βの間にフロースイッチ６８で浴槽５内に湯水があるかどうかを確認する。そして時間Ｌｎａから時間Ｌｎｂまで追い焚き運転を行う。 As shown in FIG. 4, when the bathroom is entered at time Lna before the second predetermined time (ΔL2) elapses, the bath pump 65 is first moved by β for a predetermined time at time Lna. Thereafter, the reheating pump 7 is driven to start the reheating operation. Here, whether or not there is hot water in the bathtub 5 is confirmed by the flow switch 68 during the predetermined time β. Then, the driving operation is performed from time Lna to time Lnb.
その後、時間Ｌｎｂからは第３の所定時間（△Ｌ３）毎に風呂ポンプ６５を駆動して、浴槽５内の湯水の温度を検出する。入浴中は、第３の所定時間（△Ｌ３）毎に風呂ポンプ６５を駆動して、浴槽５内の湯水の温度を検出し、所定温度Ｔｓ（追い焚き開始温度）を下回った時点で、追い焚き運転を再開するようにしている。これは入浴者の快適性を損なわないための追い焚き運転である。そのため、第３の所定時間（△Ｌ３）は、第２の所定時間（△Ｌ２）よりも短くなる。 Thereafter, the bath pump 65 is driven every third predetermined time (ΔL3) from the time Lnb to detect the temperature of the hot water in the bathtub 5. During bathing, the bath pump 65 is driven every third predetermined time (ΔL3) to detect the temperature of the hot water in the bathtub 5 and when the temperature falls below the predetermined temperature Ts (starting temperature), the bath pump 65 is driven. I'm trying to resume whispering. This is a chasing drive that does not impair the comfort of the bather. Therefore, the third predetermined time (ΔL3) is shorter than the second predetermined time (ΔL2).
図４では、時間Ｌｎｂの時点で所定温度Ｔｗ（追い焚き終了温度）まで浴槽５内の湯水
を追い焚きしたあと、時間Ｌｎｂから第３の所定時間（△Ｌ３）が経過する時間Ｌｎｃで風呂ポンプ６５を所定時間α駆動して、浴槽５内の湯水の温度を検出する。その結果、所定温度Ｔｓよりも低ければ追い焚き運転を開始し、低くなければ追い焚き運転を開始しない。図４では所定温度Ｔｓを下回ってないので、追い焚き運転をしていない。
In FIG. 4, after the hot water in the bathtub 5 is chased up to the predetermined temperature Tw (reheating end temperature) at the time Lnb, the bath pump is used at the time Lnc when the third predetermined time (ΔL3) elapses from the time Lnb. 65 is driven for a predetermined time to detect the temperature of the hot water in the bathtub 5. As a result, if the temperature is lower than the predetermined temperature Ts, the chasing operation is started, and if not, the chasing operation is not started. In FIG. 4, since the temperature is not lower than the predetermined temperature Ts, the chasing operation is not performed.
そして次に時間Ｌｎｃから第３の所定時間（△Ｌ３）が経過する時間Ｌｎｄで再度、風呂ポンプ６５を所定時間α駆動して、浴槽５内の湯水の温度を検出する。図４の場合には、時間Ｌｎｄで浴槽５内の湯水の温度を検出した結果、所定温度Ｔｓよりも低くなっているので、追い焚きポンプ７を駆動して、浴槽５内の湯水の温度が、所定温度Ｔｗになるまで追い焚き運転を行っている。 Then, the bath pump 65 is again driven for a predetermined time α at a time Lnd at which a third predetermined time (ΔL3) elapses from the time Lnc, and the temperature of the hot water in the bathtub 5 is detected. In the case of FIG. 4, as a result of detecting the temperature of the hot water in the bathtub 5 at the time Lnd, the temperature is lower than the predetermined temperature Ts, so the reheating pump 7 is driven and the temperature of the hot water in the bathtub 5 is increased. The chasing operation is performed until the predetermined temperature Tw is reached.
なお、人体検出手段９３では、人の動きを検出して浴室内に人がいると判断している。そのため、人体検出手段９３で人を検知しない時間が、所定時間γ（例えば、５分）を経過すると、人の不在を確定して浴室内には人がいないと判断する。そして人の不在が確定すると、図３に示す人体検出手段９３の機能をオンにしている時の不在時の追い焚き運転に戻る。 The human body detection means 93 detects the movement of the person and determines that there is a person in the bathroom. Therefore, when the time when the human body detection means 93 does not detect a person passes a predetermined time γ (for example, 5 minutes), the absence of the person is determined and it is determined that there is no person in the bathroom. When the absence of the person is confirmed, the operation returns to the chasing operation in the absence when the function of the human body detecting means 93 shown in FIG. 3 is turned on.
次に、時間Ｌｎａから時間Ｌｎｂまでの追い焚き運転について説明する。図４の点線で囲んだＫ部分について図５に拡大して示す。 Next, a chasing operation from time Lna to time Lnb will be described. FIG. 5 shows an enlarged view of a portion K surrounded by a dotted line in FIG.
図５において、時間Ｌｎａに人体検出手段９３で人体を検出すると、風呂ポンプ６５を所定時間β駆動して、浴槽５内の湯水の存在を確認する。そして所定時間βの間に浴槽５内の湯水の存在が確認できれば、追い焚きポンプ７を駆動して、浴槽５内の湯水の追い焚きを開始する。 In FIG. 5, when a human body is detected by the human body detection means 93 at time Lna, the bath pump 65 is driven for a predetermined time β to confirm the presence of hot water in the bathtub 5. If the presence of hot water in the bathtub 5 can be confirmed during the predetermined time β, the reheating pump 7 is driven to start reheating hot water in the bathtub 5.
本実施の形態では、通常の追い焚き開始温度Ｔｓ、追い焚き終了温度Ｔｗに加えて、リモコン装置９で設定した保温温度Ｔ１、保温温度Ｔ１と追い焚き開始温度Ｔｓとの間に中間温度Ｔ２を設けている。 In the present embodiment, in addition to the normal reheating start temperature Ts and reheating end temperature Tw, the heat retention temperature T1 set by the remote controller 9 and the intermediate temperature T2 between the heat retention temperature T1 and the reheating start temperature Ts are set. Provided.
そして、人体を検出して追い焚き運転を開始したら、浴槽５内の温度が確定するまでは強制的に一定時間（例えば、３０秒間）の間、追い焚き熱交換器６での加熱能力が「大」となるように追い焚き運転を行う。 When the human body is detected and the reheating operation is started, the heating capacity of the reheating heat exchanger 6 is forcibly set for a certain time (for example, 30 seconds) until the temperature in the bathtub 5 is determined. Carry out driving to become “large”.
そして、浴槽５内の温度を検出した結果、温度センサ６７で検出する浴槽５内の湯水の温度Ｔｉが、ＴｓとＴ２との間にあった場合（Ｔｓ＜Ｔｉ＜Ｔ２の時）は、追い焚き熱交換器６での加熱能力が「大」となるように、追い焚き運転を開始する。図５では時間Ｌｎａから時間Ｌｎａ１まで加熱能力を「大」にして追い焚き運転を行う。 If the temperature Ti of the hot water in the bathtub 5 detected by the temperature sensor 67 is between Ts and T2 (when Ts <Ti <T2) as a result of detecting the temperature in the bathtub 5, a reheating heat is generated. The reheating operation is started so that the heating capacity in the exchanger 6 becomes “high”. In FIG. 5, from the time Lna to the time Lna1, the heating capacity is set to “high” and the reheating operation is performed.
また加熱能力を「大」にして追い焚き運転を行っているときには、温度センサ６９で検出される湯水の温度の上限温度も「大」にしている。つまり、加熱能力が「大」となるように追い焚きポンプ７を制御するが、一方で温度センサ６９での上限温度が６０℃を超えないように追い焚きポンプ７の制御を行っている。 When the reheating operation is performed with the heating capacity set to “high”, the upper limit temperature of the hot water detected by the temperature sensor 69 is also set to “high”. That is, the reheating pump 7 is controlled so that the heating capacity becomes “high”, while the reheating pump 7 is controlled so that the upper limit temperature in the temperature sensor 69 does not exceed 60 ° C.
そして、温度センサ６７で検出する浴槽５内の湯水の温度Ｔｉが中間温度Ｔ２を超えたら、加熱能力が「中」となるように、保温温度Ｔ１まで追い焚き運転を行う。そのため追い焚き熱交換器６での熱交換効率を高めて、貯湯タンク３内の高温水を効率よく追い焚き運転に使用することができる。図５では時間Ｌｎａ１から時間Ｌｎａ２まで加熱能力を「中」にして追い焚き運転を行う。 Then, when the temperature Ti of the hot water in the bathtub 5 detected by the temperature sensor 67 exceeds the intermediate temperature T2, the reheating operation is performed up to the heat retention temperature T1 so that the heating capacity becomes “medium”. Therefore, the heat exchange efficiency in the reheating heat exchanger 6 can be increased, and the high-temperature water in the hot water storage tank 3 can be efficiently used for reheating operation. In FIG. 5, from the time Lna1 to the time Lna2, the heating capability is set to “medium” and the reheating operation is performed.
また加熱能力を「中」にして追い焚き運転を行っているときには、温度センサ６９で検
出される湯水の温度の上限温度も「中」にしている。つまり、加熱能力が「中」となるように追い焚きポンプ７を制御するが、一方で温度センサ６９での上限温度が５７℃を超えないように追い焚きポンプ７の制御を行っている。
When the reheating operation is performed with the heating capacity set to “medium”, the upper limit temperature of the hot water detected by the temperature sensor 69 is also set to “medium”. That is, the reheating pump 7 is controlled so that the heating capacity becomes “medium”, while the reheating pump 7 is controlled so that the upper limit temperature in the temperature sensor 69 does not exceed 57 ° C.
さらに、温度センサ６７で検出する浴槽５内の湯水の温度Ｔｉが保温温度Ｔ１を超えたら、加熱能力が「小」となるように、所定温度Ｔｗ（追い焚き終了温度）まで追い焚き運転を行う。その結果、さらに貯湯タンク３内の高温水を効率よく追い焚き運転に使用することができ、さらに貯湯タンク３に戻す温水の温度を低くすることができるので、ヒートポンプでの沸き上げ効率を向上させることができる。図５では時間Ｌｎａ２から時間Ｌｎｂまで加熱能力を「小」にして追い焚き運転を行う。 Furthermore, when the temperature Ti of the hot water in the bathtub 5 detected by the temperature sensor 67 exceeds the heat retention temperature T1, the reheating operation is performed up to a predetermined temperature Tw (reheating end temperature) so that the heating capacity becomes “small”. . As a result, the high-temperature water in the hot water storage tank 3 can be efficiently used for the reheating operation, and the temperature of the hot water returned to the hot water storage tank 3 can be lowered, thereby improving the boiling efficiency of the heat pump. be able to. In FIG. 5, from the time Lna2 to the time Lnb, the heating capacity is set to “small” and the reheating operation is performed.
また加熱能力を「小」にして追い焚き運転を行っているときには、温度センサ６９で検出される湯水の温度の上限温度も「小」にしている。つまり、加熱能力が「小」となるように追い焚きポンプ７を制御するが、一方で温度センサ６９での上限温度が５０℃を超えないように追い焚きポンプ７の制御を行っている。 When the reheating operation is performed with the heating capacity set to “small”, the upper limit temperature of the hot water detected by the temperature sensor 69 is also set to “small”. That is, the reheating pump 7 is controlled so that the heating capacity becomes “small”, while the reheating pump 7 is controlled so that the upper limit temperature in the temperature sensor 69 does not exceed 50 ° C.
以上のように、加熱能力を「大」にして運転した場合には、貯湯タンク３の底部には中温水が戻されるが、人が浴槽５に浸かるまでの僅かな時間を有効的に活用して、ある程度の温度までは素早く追い焚きすることができる。そのため非常に快適性を向上させることができる。 As described above, when the operation is performed with the heating capacity set to “large”, the medium temperature water is returned to the bottom of the hot water storage tank 3, but a short time until the person is immersed in the bathtub 5 is effectively utilized. It can quickly catch up to a certain temperature. Therefore, the comfort can be greatly improved.
そして、ある程度快適な温度まで上昇すると、加熱能力を「中」「小」とすることにより、貯湯タンク３の底部に戻す湯水の温度を低く設定することができる。特に、加熱手段にヒートポンプを用いた場合には、貯湯タンク３の底部よりヒートポンプに湯水を送っているので、貯湯タンク３の底部にある湯水の温度が低いほど良く、本実施の形態のように加熱能力を変更することで貯湯タンク３に戻す湯水の温度を低くして沸き上げ効率を高くすることができるので、非常に沸き上げ効率の高い貯湯式給湯機を実現することができる。 And if it raises to a comfortable temperature to some extent, the temperature of the hot water returned to the bottom part of the hot water storage tank 3 can be set low by setting the heating capacity to “medium” and “small”. In particular, when a heat pump is used as the heating means, hot water is sent to the heat pump from the bottom of the hot water storage tank 3, so the lower the temperature of the hot water at the bottom of the hot water storage tank 3, the better, as in this embodiment. By changing the heating capacity, the temperature of the hot water returned to the hot water storage tank 3 can be lowered and the boiling efficiency can be increased, so that a hot water storage type hot water heater having a very high boiling efficiency can be realized.
また、リモコン装置９で設定した保温温度と、温度センサ６７で検出した浴槽５内の湯水の温度との差に応じて、追い焚き熱交換器６から浴槽５へ供給する温水の上限温度を変更することで、温度差が大きければ早く温度が上昇するように上限温度を高くし、非常に快適性が向上し、温度差が小さければじんわりと浴槽５内の湯水を温度上昇させるので入浴者の入浴感を向上させることができる。 Further, the upper limit temperature of the hot water supplied from the reheating heat exchanger 6 to the bathtub 5 is changed according to the difference between the heat retention temperature set by the remote control device 9 and the temperature of the hot water in the bathtub 5 detected by the temperature sensor 67. If the temperature difference is large, the upper limit temperature is raised so that the temperature rises quickly, and the comfort is improved. If the temperature difference is small, the temperature of the hot water in the bathtub 5 is gradually raised, so the bather The bathing feeling can be improved.
また、本実施の形態では人体検出手段９３による追い焚き運転が行われてから第４の所定時間（△Ｌ４）の間は、再度人体検出手段９３で人体を検知したとしても追い焚き運転は行わないことにしている。これは追い焚き運転が行われてから、第４の所定時間（△Ｌ４）の間は、あまり温度低下していないと判断し、人体検出手段９３で人体を検出するたびに追い焚き運転を行ったのでは、貯湯タンク３内の高温水を無駄に使用してしまう可能性があるためである。 Further, in the present embodiment, during the fourth predetermined time (ΔL4) after the chasing operation by the human body detecting means 93, the chasing operation is performed even if the human body detecting means 93 detects the human body again. Not going to be. It is determined that the temperature has not decreased so much during the fourth predetermined time (ΔL4) after the chasing operation is performed, and the chasing operation is performed every time the human body detecting means 93 detects the human body. This is because the high-temperature water in the hot water storage tank 3 may be wasted.
図６は、第４の所定時間について説明する追い焚き運転のフローチャートである。図６では、時間Ｌｎｂで人体検出手段９３による追い焚き運転が完了し、その後、時間経過に伴い放熱して浴槽５内の湯水の温度が低下していく様子を表している。 FIG. 6 is a flowchart of the chasing operation for explaining the fourth predetermined time. In FIG. 6, the chasing operation by the human body detection means 93 is completed at time Lnb, and then the heat is dissipated with the passage of time and the temperature of the hot water in the bathtub 5 is decreased.
そして人体検出手段９３による追い焚き運転が完了してから第４の所定時間（△Ｌ４）が経過するまでの時間Ｌｎｂ１に、再度人体検出手段９３で人体を検出したとする。通常の人体検出手段９３による追い焚き運転では、すぐに追い焚き運転を開始するが、第４の所定時間内であるため、追い焚き運転を開始していない。 It is assumed that the human body detecting unit 93 detects the human body again at a time Lnb1 from the completion of the chasing operation by the human body detecting unit 93 to the elapse of the fourth predetermined time (ΔL4). In the chasing operation by the normal human body detection means 93, the chasing operation is started immediately, but since it is within the fourth predetermined time, the chasing operation is not started.
それに対して、第４の所定時間が経過した後の時間Ｌｎｂ２に再度人体検出手段９３で人体を検出したとする。その結果、人体を検出したとしてすぐに追い焚き運転を開始する。 On the other hand, it is assumed that the human body is detected again by the human body detection means 93 at time Lnb2 after the fourth predetermined time has elapsed. As a result, even if a human body is detected, the chasing operation is started immediately.
このように、一度人体検出をして追い焚き運転をしてから第４の所定時間が経過するまではそれほど浴槽５内の湯水の温度が低下していないと判断し、第４の所定時間内の追い焚き運転を中止している。また、第４の所定時間が経過した後には浴槽５内の湯水の温度が低下していると判断し、人体検出があれば追い焚きを開始して、入浴者の入浴感を損なうことがないようにしている。 In this way, it is determined that the temperature of the hot water in the bathtub 5 has not decreased so much until the fourth predetermined time has elapsed after the human body detection and the chasing operation, and within the fourth predetermined time. Has been stopped. Further, after the fourth predetermined time has elapsed, it is determined that the temperature of the hot water in the bathtub 5 has decreased, and if there is a human body detection, the chasing is started and the bather's feeling of bathing is not impaired. I am doing so.
以上のように、第４の所定時間を設けることで、不必要な追い焚き運転を止めることができるので、貯湯タンク３内の高温水を無駄に使用することもなくなり、非常に省エネ性能を向上させることができる。 As described above, by providing the fourth predetermined time, unnecessary chasing operation can be stopped, so that high-temperature water in the hot water storage tank 3 is not wasted and the energy saving performance is greatly improved. Can be made.
次に、酸素運転中、かつ、人体検出手段９３の機能をオンにしている時の自動追い焚き運転について説明する。入浴者が酸素入浴を楽しみたいときには、酸素スイッチ９７を押下することによって酸素運転を開始することができる。酸素スイッチ９７を押下して酸素運転を開始すると、酸素富化装置９５が駆動して酸素濃度の高い空気を抽出し、酸素供給配管９６へ送る。 Next, an automatic repulsion operation during the oxygen operation and when the function of the human body detection means 93 is turned on will be described. When the bather wants to enjoy oxygen bathing, the oxygen operation can be started by pressing the oxygen switch 97. When the oxygen operation is started by depressing the oxygen switch 97, the oxygen enricher 95 is driven to extract air having a high oxygen concentration and send it to the oxygen supply pipe 96.
このとき、酸素供給配管９６から酸素濃度の高い空気が供給されるのと合せて、風呂ポンプ６５を運転して、酸素供給配管９６に供給された酸素をアダプタ５１から浴槽５へ噴出させる。そのため、酸素運転中は風呂ポンプ６５が常時駆動しているため、浴槽の湯は風呂配管を循環して放熱状態になる。 At this time, together with the supply of air having a high oxygen concentration from the oxygen supply pipe 96, the bath pump 65 is operated, and the oxygen supplied to the oxygen supply pipe 96 is jetted from the adapter 51 to the bathtub 5. Therefore, since the bath pump 65 is always driven during the oxygen operation, the hot water in the bathtub circulates in the bath piping and enters a heat dissipation state.
ところが、これまでは風呂ポンプ６５を駆動することによって配管内に溜まった冷水が浴槽５内へ放出されることによって、浴槽５内の湯水の温度を低下させていたが、風呂ポンプ６５を常時駆動させていることによって、常時温度センサ６７で温度を検出可能な状態となり、所定時間毎に風呂ポンプ６５を駆動させる必要がなくなり、実際の浴槽の温度に合わせて追い焚き運転を行うことができる。 However, until now, the temperature of the hot water in the bathtub 5 has been lowered by the cold water accumulated in the pipe being discharged into the bathtub 5 by driving the bath pump 65, but the bath pump 65 is always driven. Thus, the temperature can be detected by the temperature sensor 67 at all times, and it is not necessary to drive the bath pump 65 every predetermined time, and the reheating operation can be performed in accordance with the actual bath temperature.
次に、酸素運転中の追い焚き運転のフローを図７を用いて説明する。酸素運転をしていない状態では、所定時間（△Ｌ１ｏｒ△Ｌ２）毎に風呂ポンプ６５をＯＮして浴槽水を循環させて、風呂ポンプ６５を所定時間αの間駆動してから温度センサ６７で浴槽温度を検出して追い焚き開始温度Ｔｓまで低下しているかどうか判定する。その結果、温度センサ６７で検出する温度がＴｓ以下でなければ、風呂ポンプ６５を停止させて、再度、所定時間（△Ｌ１ｏｒ△Ｌ２）の間待機状態を継続させる。また、温度センサ６７で検出する温度がＴｓ以下と判定したら追い焚きポンプ７をＯＮして追い焚きを行う。そして、追い焚き運転を継続しながら、温度センサ６７で浴槽温度を検出し、温度センサ６７が追い焚き終了温度Ｔｗを検出したら追い焚きポンプ７、風呂ポンプ６５を停止させて追い焚きを終了し、次の所定時間（△Ｌ１ｏｒ△Ｌ２）待機する。 Next, the flow of the chasing operation during the oxygen operation will be described with reference to FIG. When the oxygen operation is not performed, the bath pump 65 is turned on every predetermined time (ΔL1 or ΔL2) to circulate the bath water, and the bath pump 65 is driven for a predetermined time α. The bathtub temperature is detected and it is determined whether or not the temperature has decreased to the reheating start temperature Ts. As a result, if the temperature detected by the temperature sensor 67 is not equal to or lower than Ts, the bath pump 65 is stopped and the standby state is continued again for a predetermined time (ΔL1 or ΔL2). If it is determined that the temperature detected by the temperature sensor 67 is equal to or lower than Ts, the reheating pump 7 is turned on to perform reheating. Then, while continuing the chasing operation, the bath temperature is detected by the temperature sensor 67, and when the temperature sensor 67 detects the chasing end temperature Tw, the chasing pump 7 and the bath pump 65 are stopped to end chasing, Wait for the next predetermined time (ΔL1 or ΔL2).
一方、酸素運転中は、酸素運転のＯＮと合せて風呂ポンプ６５が運転を開始して浴槽水の循環が開始する。風呂ポンプ６５が運転を継続して浴槽の温度は温度センサ６７で常時検出できるため、温度センサ６７の検出温度が追い焚きをを開始する所定温度Ｔｓになったら追い焚きポンプ７を駆動させ、熱交換器６で熱交換させ浴槽の湯の追い焚きを行う。温度センサ６７の検出温度が追い焚き終了温度Ｔｗを検出したら、追い焚きポンプ７を停止して熱交換器６で熱交換を終了させ追い焚きは終了する。追い焚きを終了しても風呂ポンプ６５は運転を継続しているため、温度センサ６７で浴槽温度を常に検出して、検出温
度に対応してこの追い焚き運転を繰り返す。
On the other hand, during the oxygen operation, the bath pump 65 starts operation together with the oxygen operation ON, and the bath water circulation starts. Since the bath pump 65 continues to operate and the temperature of the bathtub can always be detected by the temperature sensor 67, when the temperature detected by the temperature sensor 67 reaches a predetermined temperature Ts at which the reheating is started, the reheating pump 7 is driven to generate heat. Heat is exchanged with the exchanger 6 to replenish the hot water in the bathtub. When the temperature detected by the temperature sensor 67 detects the reheating end temperature Tw, the reheating pump 7 is stopped, the heat exchanger 6 ends heat exchange, and the reheating ends. Since the bath pump 65 continues to operate even after the reheating is finished, the bath temperature is always detected by the temperature sensor 67, and this reheating operation is repeated corresponding to the detected temperature.
また、リモコン装置９には情報を表示する表示部９１および操作を行う操作部９２を有している。酸素運転は設定されている時間が経過したら自動的に運転停止するようになっており、酸素運転中は表示部９１に酸素運転の残り時間表示を行っている。酸素運転していない場合は、常に風呂ポンプ６５が運転して温度センサ６７にて浴槽温度を検出することができないので、人体検出手段９３を用いて浴槽の人の在・不在を検出して、追い焚き運転のパターンを切り替えているが、酸素運転中は常に風呂ポンプ６５が運転しており、人の在・不在によって追い焚き運転パターンを切り分けて所定時間を計算する必要がないため、酸素入浴の快適性を優先して人がいるという認識をさせる。通常状態では、人体検出手段９３の機能がオンで不在時はリモコン表示部９１も表示消灯させるが、酸素運転中は、人体検出手段９３で人の不在を検出しても、人の不在の確定を行わず表示部９１の点灯を継続させる。 The remote control device 9 also has a display unit 91 for displaying information and an operation unit 92 for performing operations. The oxygen operation is automatically stopped when the set time has elapsed, and the remaining time of the oxygen operation is displayed on the display unit 91 during the oxygen operation. When the oxygen operation is not performed, the bath pump 65 is always operated and the temperature sensor 67 cannot detect the bathtub temperature, so the human body detection means 93 is used to detect the presence / absence of a person in the bathtub, Although the chasing operation pattern is switched, the bath pump 65 is always operated during the oxygen operation, and it is not necessary to calculate the predetermined time by dividing the chasing operation pattern depending on the presence or absence of a person. Recognize that there are people who prioritize comfort. In the normal state, when the function of the human body detection means 93 is on and absent, the remote control display unit 91 is also turned off. However, during the oxygen operation, even if the human body detection means 93 detects the absence of a person, The display unit 91 is kept lit without being performed.
このように酸素運転中は、人が浴槽に浸かって酸素入浴をしている状態の快適性を追求するため、浴槽の温度変化は小さい方が良い。このため、常に温度センサ６７で浴槽温度を検出できることから、追い焚き開始温度Ｔｓおよび追い焚き終了温度Ｔｗをより設定温度に近づけることで、酸素入浴時の快適性を向上させることができる。そこで本実施の形態では、酸素運転中は、前述の追い焚き開始温度Ｔｓおよび追い焚き終了温度Ｔｗとは異なる追い焚き開始温度Ｔｓ２および追い焚き終了温度Ｔｗ２を新たに設定し、追い焚き開始温度Ｔｓ２および追い焚き終了温度Ｔｗ２に基づいて追い焚き運転を行う。 Thus, during oxygen operation, in order to pursue comfort in a state where a person is bathed in an oxygen bath, it is better that the temperature change of the bathtub is small. For this reason, since the bathtub temperature can always be detected by the temperature sensor 67, the comfort at the time of oxygen bathing can be improved by bringing the reheating start temperature Ts and the reheating end temperature Tw closer to the set temperature. Therefore, in the present embodiment, during the oxygen operation, a renewal start temperature Ts2 and a renewal end temperature Tw2 different from the retreat start temperature Ts and retreat end temperature Tw described above are newly set, and the retreat start temperature Ts2 is set. Further, the chasing operation is performed based on the chasing end temperature Tw2.
なお、追い焚き開始温度Ｔｓ２は追い焚き開始温度Ｔｓよりも大きく、追い焚き終了温度Ｔｗ２は追い焚き終了温度Ｔｗよりも小さく設定している。このように設定することで、追い焚き開始温度と追い焚き終了温度との温度差を小さくすることができ、酸素入浴を楽しんでいる入浴者にも追い焚き温度幅を小さくするので、より快適さを提供することができる。 The reheating start temperature Ts2 is set higher than the reheating start temperature Ts, and the renewal end temperature Tw2 is set lower than the reheating end temperature Tw. By setting in this way, the temperature difference between the starting temperature and the finishing temperature can be reduced, and the temperature range for the bather who enjoys oxygen bathing is also reduced. Can be provided.
このような酸素運転中の追い焚き運転のフローを図８を用いて説明する。上述したように本実施の形態では、設定温度とＴｓの間に酸素運転中の追い焚き開始温度Ｔｓ２を設け、追い焚き終了温度Ｔｗよりも小さい追い焚き終了温度Ｔｗ２を設ける。そして、酸素運転中は風呂ポンプ６５が常時駆動しているので、温度センサ６７で常時温度検出可能となっている。そこで、酸素運転中は、温度センサ６７で検出する温度が追い焚き開始温度Ｔｓ２を検出したら、追い焚きポンプ７を駆動させて追い焚き運転を開始する。 The flow of such a chasing operation during the oxygen operation will be described with reference to FIG. As described above, in the present embodiment, the reheating start temperature Ts2 during the oxygen operation is provided between the set temperature and Ts, and the renewal end temperature Tw2 smaller than the renewal end temperature Tw is provided. Since the bath pump 65 is always driven during the oxygen operation, the temperature sensor 67 can always detect the temperature. Therefore, during the oxygen operation, when the temperature detected by the temperature sensor 67 detects the reheating start temperature Ts2, the reheating pump 7 is driven to start the reheating operation.
そして、温度センサ６７で検出する温度が追い焚き終了温度Ｔｗ２となると、追い焚きポンプ７を停止して追い焚き運転を終了させる。このとき、酸素運転が継続しているので風呂ポンプ６５の駆動は継続させる。なお、本実施の形態では、追い焚き終了温度Ｔｗ２を設定温度とした。これにより当初追い焚き開始温度Ｔｓを設定温度−０．５℃、追い焚き終了温度Ｔｗを設定温度＋０．５℃と設定していたものが、追い焚き開始温度Ｔｓ２を設定温度−０．３℃としたら、酸素運転していない時は、保温中の追い焚き運転によって１℃以上の温度変化があったものが、酸素運転中は温度変化は０．３℃に抑えられ、酸素入浴の快適性が向上されている。 When the temperature detected by the temperature sensor 67 reaches the reheating end temperature Tw2, the reheating pump 7 is stopped to end the reheating operation. At this time, since the oxygen operation is continued, the driving of the bath pump 65 is continued. In the present embodiment, the reheating end temperature Tw2 is set as the set temperature. As a result, the reheating start temperature Ts2 is set to the set temperature −0.3 ° C. The reheating start temperature Ts2 is set to the set temperature −0.3 ° C. If there is no oxygen operation, the temperature change of 1 ° C or more was caused by the chasing operation during the heat retention, but the temperature change was suppressed to 0.3 ° C during the oxygen operation, and the comfort of oxygen bathing Has been improved.
次に、酸素運転中の追い焚き運転の上限温度について説明する。図９は酸素運転停止中の追い焚き運転時の上限温度と、酸素運転中の追い焚き運転時の上限温度とを比較した図である。図９において、追い焚き上限温度Ｔｘを酸素運転停止中の上限温度、追い焚き上限温度Ｔｘ２を酸素運転中の上限温度とする。上限温度は、温度センサ６９で検出する温度で制御されており、温度センサ６９で検出する温度が設定されている上限温度を超えないように、追い焚きポンプ７の回転数が制御される。 Next, the upper limit temperature of the chasing operation during the oxygen operation will be described. FIG. 9 is a diagram comparing the upper limit temperature during reheating operation with oxygen operation stopped and the upper limit temperature during reheating operation during oxygen operation. In FIG. 9, the reheating upper limit temperature Tx is the upper limit temperature during the oxygen operation stop, and the renewal upper limit temperature Tx2 is the upper limit temperature during the oxygen operation. The upper limit temperature is controlled by the temperature detected by the temperature sensor 69, and the rotational speed of the reheating pump 7 is controlled so that the temperature detected by the temperature sensor 69 does not exceed the set upper limit temperature.
図９に示すように、追い焚き開始時は、浴槽温度も低下しているため、追い焚きポンプ７はある程度能力「大」で運転させる。これにより加熱された後の浴槽温度は急激に立ち上がり、温度センサ６９の検出温度は上昇する。温度センサ６９の検出温度が追い焚きの上限温度を検出すると、追い焚きポンプ７の能力を下げて、温度センサ６９の検出温度が追い焚き上限温度を超えないように加熱量を制御する。 As shown in FIG. 9, at the start of reheating, since the bathtub temperature is also lowered, the reheating pump 7 is operated with a capacity of “large” to some extent. As a result, the bath temperature after being heated rises rapidly, and the temperature detected by the temperature sensor 69 rises. When the detected temperature of the temperature sensor 69 detects the upper limit temperature of the reheating, the capacity of the reheating pump 7 is lowered, and the heating amount is controlled so that the detected temperature of the temperature sensor 69 does not exceed the reheating upper limit temperature.
酸素運転中の追い焚き上限温度Ｔｘ２は、通常時の追い焚き上限温度Ｔｘよりも低く設定されており、追い焚きポンプ７の能力も低く制御される。追い焚き開始温度Ｔｓ２と追い焚き終了温度Ｔｗ２の温度差が小さく設定されており、追い焚き能力も低く制御されるため、追い焚きは温度上昇をゆっくりしながら、時間もかけて行うことになる。この時、加熱された浴槽温度も低く抑えられているため、アダプタから吐出される湯温も低く、酸素入浴していて酸素とともに出てくるお湯に触れても、熱く感じることもなく、快適な入浴が可能である。 The reheating upper limit temperature Tx2 during the oxygen operation is set lower than the reheating upper limit temperature Tx during normal operation, and the ability of the reheating pump 7 is also controlled to be low. Since the temperature difference between the start-up temperature Ts2 and the end-up temperature Tw2 is set to be small and the follow-up ability is controlled to be low, the follow-up is performed over time while slowly increasing the temperature. At this time, the temperature of the heated bathtub is kept low, so the temperature of the hot water discharged from the adapter is low, and even if you touch the hot water that comes out with oxygen while bathing in oxygen, you will not feel hot and comfortable Bathing is possible.
以上のように、本発明は、人感センサを設けることによって最適な追い焚き運転を実現し、ひいては貯湯タンク３内に貯めた高温水の使用を抑制することができる。さらに、酸素運転機能が付いた貯湯式給湯機においても、酸素入浴に適した追い焚き運転を実現することができ、快適な酸素入浴を実現することができる。 As described above, according to the present invention, it is possible to realize the optimum reheating operation by providing the human sensor, and to suppress the use of the high temperature water stored in the hot water storage tank 3. Furthermore, even in a hot water storage type water heater with an oxygen operation function, a reheating operation suitable for oxygen bathing can be realized, and a comfortable oxygen bathing can be realized.
本発明に係る貯湯式給湯機は、ヒートポンプサイクルと給湯サイクルが一体に構成された一体型ヒートポンプ式給湯機、別体に構成された分離型ヒートポンプ式給湯機、給湯用熱交換器で加熱したお湯をそのまま出湯できる直接出湯型ヒートポンプ式給湯機などの各種ヒートポンプ給湯機に適用できる。 The hot water storage type hot water heater according to the present invention includes an integrated heat pump type hot water heater in which a heat pump cycle and a hot water supply cycle are integrated, a separate heat pump type hot water heater configured separately, and hot water heated by a heat exchanger for hot water supply. It can be applied to various heat pump water heaters such as a direct hot water heat pump type hot water heater that can discharge hot water as it is.
１ タンクユニット
２ ヒートポンプユニット
３ 貯湯タンク
５ 浴槽
６ 追い焚き熱交換器
７ 追い焚きポンプ
９ リモコン装置
２８ 水ポンプ
６０ａ〜６０ｄ 接続部
６１ 戻り接続管
６２ 往き接続管
６３ 戻り配管
６４ 往き配管
６５ 風呂ポンプ
９３ 人体検出手段
９５ 酸素富化装置
９６ 酸素供給配管
９７ 酸素開始手段
DESCRIPTION OF SYMBOLS 1 Tank unit 2 Heat pump unit 3 Hot water storage tank 5 Bathtub 6 Reheating heat exchanger 7 Reheating pump 9 Remote control device 28 Water pump 60a-60d Connection part 61 Return connection pipe 62 Outward connection pipe 63 Return pipe 64 Outward pipe 65 Bath pump 93 Human body detection means 95 Oxygen enrichment device 96 Oxygen supply pipe 97 Oxygen start means
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