JP2019184146A - Storage type hot water supply system - Google Patents

Storage type hot water supply system Download PDF

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JP2019184146A
JP2019184146A JP2018074552A JP2018074552A JP2019184146A JP 2019184146 A JP2019184146 A JP 2019184146A JP 2018074552 A JP2018074552 A JP 2018074552A JP 2018074552 A JP2018074552 A JP 2018074552A JP 2019184146 A JP2019184146 A JP 2019184146A
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hot water
temperature
water storage
water supply
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JP6774980B2 (en
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輝道 菅
Terumichi Suga
輝道 菅
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Tosha Giken Co Ltd
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Abstract

To provide a storage type hot water supply system capable of realizing hot water supply efficiently and effectively at a desired temperature when a problem such as hot water shortage occurs during hot water supply from a hot water storage tank.SOLUTION: This invention relates to a storage type hot water supply system comprising: a heat pump 1; a hot water storage tank 2 whose primary side is connected to a feed pipe of hot water generated by a heat exchanger, and whose secondary side is connected to a hot water supply pipe enabling the hot water to be delivered to plural loads; a preliminary hot water delivery pipe capable of connecting at least a direct pressure type or combustion type preliminary hot water supply unit 6 between the feed pipe and the loads; a detecting part for detecting a temperature of the hot water in the hot water storage tank; and a control part 3 for setting a temperature of hot water delivered from the hot water storage tank to a predetermined temperature, supplying hot water to the loads through the preliminary hot water supply unit and the preliminary hot water delivery pipe, activating the preliminary hot water supply unit when the temperature detected by the detecting part is less than the set predetermined temperature, generating the hot water heated to the predetermined temperature, and supplying hot water to the loads.SELECTED DRAWING: Figure 1

Description

本発明は、ヒートポンプ等によって生成された温湯を給湯する貯湯式給湯システムに関するものである。   The present invention relates to a hot water storage hot water supply system that supplies hot water generated by a heat pump or the like.

近年、給湯器として、ヒートポンプ等で生成した温湯を貯湯タンクに貯留し、当該貯湯タンクから、台所、洗面所、風呂などの負荷に給湯する貯湯式給湯システムの導入が増加している。なお、前記ヒートポンプは、少なくとも、熱交換器、コンプレッサ、水熱交換器を備え、外気の熱エネルギーを内部に取り込み、前記熱交換器を介して冷媒(自然冷媒)を温める。当該暖められた冷媒は、前記コンプレッサで圧縮してさらに高温とされ、水熱交換器を介して、前記貯湯タンク内の水を温める。   In recent years, the introduction of hot water storage hot water supply systems that store hot water generated by a heat pump or the like in a hot water storage tank and supply hot water from the hot water storage tank to a load such as a kitchen, a washroom, or a bath is increasing. The heat pump includes at least a heat exchanger, a compressor, and a water heat exchanger, takes in the heat energy of the outside air, and warms the refrigerant (natural refrigerant) through the heat exchanger. The warmed refrigerant is compressed by the compressor to a higher temperature, and warms the water in the hot water storage tank via a water heat exchanger.

この種の給湯システムは、通常、前記貯湯タンク内に供給された水を加熱し、保温する一連の処理を電気料金が安価な夜間に行うように設定されている。したがって、使用の都度加熱する瞬間湯沸式給湯器に比べて、給湯にかかる光熱費を抑えることができる。さらに、使用する電力も、基本的には前記コンプレッサの駆動源程度であるため、省エネルギーを実現する。   This type of hot water supply system is usually set to perform a series of processes for heating and keeping the water supplied in the hot water storage tank at night when the electricity bill is low. Therefore, compared with an instantaneous water heater that heats each time it is used, the utility cost for hot water supply can be reduced. Furthermore, since the electric power used is basically the same as the drive source of the compressor, energy saving is realized.

しかし、ヒートポンプを利用するため、外気温の影響を受けやすく、さらに、貯湯タンクは通常屋外に設置するため、特に、寒冷地において冬季期間中は、発熱効率の低下が著しく、前記貯湯タンク内の温湯が不足する湯切れが発生するなど、放熱ロスの問題が生じる可能性があった。   However, since the heat pump is used, it is easily affected by the outside air temperature. Further, since the hot water storage tank is usually installed outdoors, the heat generation efficiency is remarkably lowered particularly in a cold region during the winter season. There may be a problem of heat dissipation loss, such as running out of hot water due to lack of hot water.

そこで、従来、例えば、電気加熱器(電気ヒータ)で加熱した湯を貯湯する貯湯タンクと、この貯湯タンク内に連通する給湯配管を備え、当該給湯配管は、その途中の少なくとも1か所で分岐して、その各分岐管がそれぞれ給湯場所へと導かれるとともに、上記分岐管の少なくとも1本の管にはガス瞬間式湯沸器を接続した電気温水器が提案されていた(例えば、特許文献1参照。)。   Therefore, conventionally, for example, a hot water storage tank for storing hot water heated by an electric heater (electric heater) and a hot water supply pipe communicating with the hot water storage tank are provided, and the hot water supply pipe is branched at at least one point in the middle thereof. Each branch pipe is led to a hot water supply place, and an electric water heater in which a gas instantaneous water heater is connected to at least one of the branch pipes has been proposed (for example, Patent Documents). 1).

この構成によれば、例えば、貯湯タンク内に貯湯する湯の温度を台所での使用に適した温度(60℃)にするとともに、浴室には前記分岐管に接続されたガス瞬間式湯沸器で追い加熱して高温(80℃)の給湯をすることで、各給湯場所にそれぞれの目的に適した温度の湯を給湯することが可能となる。   According to this configuration, for example, the temperature of hot water stored in the hot water storage tank is set to a temperature (60 ° C.) suitable for use in the kitchen, and the gas instantaneous water heater connected to the branch pipe is used in the bathroom. It is possible to supply hot water having a temperature suitable for each purpose to each hot water supply place by additionally heating the hot water and supplying hot water (80 ° C.).

また、深夜電力利用型を含む電気式貯湯槽付き給湯機にガス式及び灯油利用型の瞬間式給湯機を付加することで、再加熱などを行うハイブリッド給湯システムが提案されていた(例えば、特許文献2参照。)。 In addition, a hybrid hot water supply system that performs reheating and the like by adding a gas type and kerosene type instantaneous type hot water heater to a water heater with an electric hot water tank including a midnight electric power type has been proposed (for example, a patent Reference 2).

この構成によれば、従来型貯湯槽の容積を小型化し、システム効率の向上を図るとともに、熱損失、残湯損失を最小限に留めることが可能となる。 According to this configuration, it is possible to reduce the volume of the conventional hot water tank, improve the system efficiency, and minimize heat loss and residual hot water loss.

実開平5−36242号公報Japanese Utility Model Publication No. 5-36242 実用新案登録第3137813号Utility Model Registration No. 3137813

しかし、前記従来技術は、電気式貯湯槽付き給湯機と瞬間式給湯機とを単に接続するだけの構成のものを開示し、専ら貯湯槽(貯湯タンク)の容積小型化による効率化をうたったに過ぎないもの(特許文献2)、または、貯湯式の電気温水器と瞬間式湯沸器を常時同時並行で使用するもの(特許文献1)であるため、これらの構成では、前記貯湯式給湯システムのメリットが十分に発揮できない構成であった。   However, the prior art disclosed a configuration in which a hot water heater with an electric hot water tank and an instantaneous water heater are simply connected to each other, and the efficiency of the hot water tank (hot water tank) was reduced by reducing the volume. However, in these configurations, the hot water storage type hot water supply is used because the hot water storage type electric water heater and the instantaneous water heater are always used in parallel at the same time (Patent Document 1). It was a configuration that could not fully demonstrate the benefits of the system.

すなわち、貯湯式給湯システム導入の大きなメリットは、前記した通り、電気料金が安価な夜間に水を加熱して保温し、電気料金が比較的高額になる昼間での電気使用量を抑えるところにある。ところが、前記従来技術では、瞬間式給湯機、瞬間式湯沸器を温湯使用時に常時使用できる状態にしているため、前記料金的なメリットを考慮したシステム構成になっていない。既存の瞬間式給湯機、瞬間式湯沸器から貯湯式給湯システムに切り替えるユーザの最大の目的が 前記料金的なメリットであるとすれば、前記従来技術のような構成のシステムでは導入のインセンティブが働かない。 In other words, the major advantage of introducing a hot water storage hot water supply system is that, as described above, water is heated and kept warm at night when the electricity bill is low, and the amount of electricity used in the daytime when the electricity bill is relatively high is suppressed. . However, in the prior art, since the instantaneous water heater and the instantaneous water heater can be used at all times when hot water is used, the system configuration does not take into account the above-mentioned merit in terms of charge. If the biggest purpose of the user to switch from the existing instantaneous water heater / instant water heater to the hot water storage hot water system is the price advantage, the system with the configuration as in the prior art has an incentive to introduce Does not work.

ところで、前記貯湯式給湯システムの導入は、既存の給湯器から切り替えるケースも多い。給湯器の設置業者は、通常、既存の給湯器を完全に撤去し、新規の貯湯式給湯システムを設置するが、例えば、前記従来技術で開示されている構成のように、単純に既存の給湯器と接続した場合、貯湯式給湯システムの出湯圧力が既存の給湯器側で許容されている流入最大圧力を超えると、前記出湯圧力によって給湯管の破損が生じ、水漏れの原因になるおそれがあった。 By the way, the introduction of the hot water storage type hot water supply system is often switched from an existing hot water heater. The installer of the water heater usually removes the existing water heater completely and installs a new hot water storage hot water system. For example, as in the configuration disclosed in the prior art, the existing hot water heater is simply used. If the hot water pressure of the hot water storage hot water system exceeds the maximum inflow pressure allowed on the existing hot water heater side, the hot water pipe may be damaged by the hot water pressure, which may cause water leakage. there were.

なお、前記ヒートポンプは、通常、屋外に設置される。そして、排気の際に、熱交換器に結露が生じる。この結露に不純物などが溶け込んで酸性の液体となった場合、これがヒートポンプ近傍に垂れ流されると、ヒートポンプを設置する架台などを腐食させる原因になる。そこで、ヒートポンプ設置の際に、ヒートポンプにドレン排管を接合し、前記腐食等の不都合回避可能な領域に排水するようにしている。ところが、寒冷地では、冬季にドレン排管が凍結し、排水を妨げるおそれがあるため、ドレン排管の接合を禁じており、結果、ヒートポンプの架台腐食による設置不安定化、さらには動作不良の原因になるおそれがあった。ヒートポンプの動作不良が発生すると、前記従来技術のように、貯湯式の電気温水器と既存の給湯器を接続して使用する場合に、目的とする効率的な給湯の実現を阻害するおそれがあった。 The heat pump is usually installed outdoors. When exhausting, condensation occurs in the heat exchanger. When impurities or the like are dissolved in the condensation and become an acidic liquid, if this is dripped in the vicinity of the heat pump, it may cause corrosion of a frame on which the heat pump is installed. Therefore, when the heat pump is installed, a drain exhaust pipe is joined to the heat pump and drained to an area where inconvenience such as corrosion can be avoided. However, in cold regions, the drain exhaust pipe freezes in winter and may interfere with drainage, so it is prohibited to join the drain exhaust pipe. There was a risk of this. If a malfunction of the heat pump occurs, there is a risk of hindering the realization of the target efficient hot water supply when the hot water storage type electric water heater and the existing hot water heater are connected as in the prior art. It was.

そこで、本発明は、上記課題を解消させるためのものであり、貯湯式給湯システム導入の利点を最大限活用しつつ、湯切れ等の不具合が生じた場合に、効率的、効果的に所望の温度で給湯を実現できる貯湯式給湯システムを提供することを目的とする。 Therefore, the present invention is for solving the above-mentioned problems, and when the trouble such as running out of the hot water occurs while maximizing the advantage of introducing the hot water storage type hot water supply system, it is efficiently and effectively desired. It aims at providing the hot water storage type hot water supply system which can implement hot water supply with temperature.

上記目的を達成させるために、本発明にかかる貯湯式給湯システムは、貯湯タンクから供給される温湯が、設定された温度未満の場合にのみ、別の給湯器を作動させ、前記設定された温度に加温するように制御することを特徴とする。   In order to achieve the above object, the hot water storage type hot water supply system according to the present invention operates another hot water heater only when the hot water supplied from the hot water storage tank is lower than the set temperature, and the set temperature is set. It is characterized by being controlled so as to be heated.

すなわち、本発明にかかる貯湯式給湯システムであって、
給水された水から温湯を生成する温湯生成部と、
前記生成された温湯を貯留し、給湯管を介して前記温湯を負荷に出湯するする貯湯部と、
前記供給管と前記負荷との間に、少なくとも、直圧式又は燃焼式の予備給湯器を接続可能とする予備系出湯管と、
前記貯湯部内の温湯の温度を検知する検知部と、
前記貯湯部から出湯する温湯を所定の温度に設定し、前記予備給湯器及び予備系出湯管を介して、前記負荷に給湯するとともに、前記検知部で検知された温度が、前記設定された所定の温度未満の場合に、前記予備給湯器を作動させ、所定の温度に加温した温湯を生成して前記負荷に給湯する制御部と、
を有することを最も主要な特徴とする。
That is, in the hot water storage hot water supply system according to the present invention,
A hot water generator that generates hot water from the supplied water;
A hot water storage section for storing the generated hot water and discharging the hot water to a load via a hot water supply pipe;
Between the supply pipe and the load, at least a preliminary hot water outlet pipe that can connect a direct pressure type or combustion type preliminary hot water heater;
A detection unit for detecting the temperature of the hot water in the hot water storage unit;
Hot water discharged from the hot water storage unit is set to a predetermined temperature, hot water is supplied to the load via the preliminary hot water supply device and a standby hot water discharge pipe, and the temperature detected by the detection unit is set to the predetermined predetermined temperature. A controller that activates the preliminary water heater to generate hot water heated to a predetermined temperature and supply hot water to the load,
It has the most important feature.

この構成によれば、前記予備給湯器が稼働するのは、貯湯タンクに蓄えられている温湯が、ユーザが所望する設定温度未満の場合(いわゆる「湯切れ」の場合)であるため、当該設定温度が維持されている限り、専ら貯湯タンクの温湯が供給され、電気料金が安価な夜間料金によって生成された温湯を最大限利用することが可能になる。 According to this configuration, the hot water heater is operated when the hot water stored in the hot water storage tank is lower than the set temperature desired by the user (in the case of so-called “hot water out”). As long as the temperature is maintained, the hot water in the hot water storage tank is exclusively supplied, and it is possible to make maximum use of the hot water generated by the night charge at a low electricity charge.

前記温湯生成部が、外気の熱エネルギーを吸収した冷媒を圧縮し、熱交換器を介して還流させるヒートポンプから構成され、前記貯湯部が、一次側が前記熱交換器によって生成された温湯の供給管に接続され、二次側が前記温湯を複数の前記負荷に送湯する給湯管に接続された貯湯タンクから構成され、前記制御部は、前記貯湯タンクから出湯する温湯の温度を第1設定温度とし、前記予備系出湯管から出湯する温湯の温度を前記第1設定温度よりも低い第2設定温度として各々設定可能とし、前記検知部で検知された温度が前記第2設定温度未満の場合に、前記予備給湯器を作動させ、前記第2設定温度まで加温して前記負荷に給湯可能としてもよい。 The hot water generation unit is composed of a heat pump that compresses the refrigerant that has absorbed the thermal energy of the outside air and recirculates it through a heat exchanger, and the hot water storage unit has a hot water supply pipe whose primary side is generated by the heat exchanger. And a secondary side is connected to a hot water supply pipe for supplying the hot water to the plurality of loads, and the control unit sets the temperature of the hot water discharged from the hot water tank as a first set temperature. The temperature of the hot water discharged from the standby hot water discharge pipe can be set as a second set temperature lower than the first set temperature, respectively, and when the temperature detected by the detection unit is less than the second set temperature, The preliminary water heater may be operated and heated to the second set temperature so that hot water can be supplied to the load.

前記予備給湯器を第1設定温度よりも低下する都度作動させると、前記予備給湯器の作動を頻繁に繰り返すことになり、エネルギー効率の低下を招くことになる。そこで、前記貯湯タンクから出湯する温湯の温度、すなわち、第1設定温度と、前記予備給湯器が作動する温度、すなわち、第2設定温度との間に所定の温度差を設けている。 When the preliminary water heater is operated each time it falls below the first set temperature, the operation of the preliminary water heater is frequently repeated, leading to a decrease in energy efficiency. Therefore, a predetermined temperature difference is provided between the temperature of the hot water discharged from the hot water storage tank, that is, the first set temperature, and the temperature at which the preliminary water heater operates, that is, the second set temperature.

前記制御部は、予備給湯器作動後、検知部が第1設定温度以上を検知すると、前記予備給湯器の作動を停止するようにしてもよい。 The control unit may stop the operation of the preliminary water heater when the detection unit detects the first set temperature or higher after the preliminary water heater is activated.

前記負荷に、少なくとも風呂が含まれ、前記予備給湯器が、前記風呂に対して追い炊き機能を有し、前記制御部が予備給湯器を作動させた場合、前記制御部は、前記風呂の湯張り及び足し湯を前記貯湯タンクから給湯させるとともに、前記予備給湯器によって追い炊きさせるようにしてもよい。湯張り及び足し湯の場合は、第2設定温度未満であっても、貯湯タンクの温湯を使用し、前記予備給湯器で追い炊きする方が、湯張り及び足し湯も含めた給湯を予備給湯器すべてに代替させるよりも全体的な熱効率は良い。 In the case where the load includes at least a bath, the spare water heater has a function of additionally cooking with respect to the bath, and the control unit operates the spare water heater, the control unit Tension and additional hot water may be supplied from the hot water storage tank and may be additionally cooked by the auxiliary hot water heater. In the case of hot water filling and additional hot water, even if the temperature is lower than the second set temperature, it is better to use hot water in the hot water storage tank and to make additional cooking with the spare water heater. The overall thermal efficiency is better than replacing it all.

ところで、前記構成の通り、前記貯湯タンクから前記予備給湯器に温湯が流入する場合、予備給湯器の流入許容圧力が、前記貯湯タンクの出湯圧力よりも低い場合、両者を単純に接続すると、貯湯タンクの出湯圧力によって、予備給湯器(具体的には、予備給湯器内の缶体、配管など)が過剰な圧力に曝されるため、損傷するおそれがあり、水漏れ等の原因になる。 By the way, as described above, when hot water flows from the hot water storage tank into the auxiliary hot water heater, when the allowable inflow pressure of the preliminary hot water heater is lower than the hot water outlet pressure of the hot water storage tank, if both are simply connected, Since the hot water supply pressure in the tank exposes the preliminary hot water heater (specifically, the can, piping, etc. in the preliminary hot water heater) to an excessive pressure, it may be damaged, resulting in water leakage.

そこで、貯湯式給湯システムを、前記供給管と前記負荷との間に設けられた切替三方弁と、水又は温湯の流入許容圧力が、前記貯湯タンクの出湯圧力を下回る直圧式又は燃焼式の予備給湯器とを接続可能とする切替出湯管と、前記貯湯タンク内の温湯の温度を検知する検知部と、前記貯湯タンクから出湯する温湯の温度を設定し、前記検知部が検知した温度が、前記設定温度未満の場合は、前記給湯管から温湯の給湯を遮断するとともに、前記予備給湯器を作動させ、所定の温度に加温した温湯を生成し、前記切替出湯管から前記負荷に温湯を給湯するように、前記切替三方弁を開閉制御する制御部と、を有する構成としてもよい。 Therefore, a hot water storage hot water supply system includes a switching three-way valve provided between the supply pipe and the load, and a direct pressure type or combustion type preparatory type in which an allowable inflow pressure of water or hot water is lower than a hot water discharge pressure of the hot water storage tank. A switching hot water pipe that can be connected to a hot water supply device, a detection unit that detects the temperature of hot water in the hot water storage tank, and a temperature of hot water that is discharged from the hot water storage tank, and the temperature detected by the detection unit, When the temperature is lower than the set temperature, the hot water supply is shut off from the hot water supply pipe, the preliminary hot water heater is operated to generate hot water heated to a predetermined temperature, and the hot water is supplied from the switching hot water supply pipe to the load. It is good also as a structure which has a control part which controls opening and closing of the said switching three-way valve so that hot water supply may be carried out.

この構成によれば、前記貯湯タンクから出湯する温湯が、前記予備給湯器に直接流入せずに、前記設定温度が低下したときに、適時、予備給湯器が作動するので、前記予備給湯器を損傷せずに、所望の温度の給湯が可能になる。 According to this configuration, the hot water discharged from the hot water storage tank does not flow directly into the spare water heater, and the spare water heater is activated in a timely manner when the set temperature is lowered. Hot water can be supplied at a desired temperature without being damaged.

なお、前記制御部は、予備給湯器作動後、検知部が前記設定温度以上を検知すると、前記予備給湯器の作動を停止するとともに、前記切替三方弁を開閉制御し、前記切替出湯管を遮断し、前記給湯管を開放して、再び貯湯タンクの温湯を負荷に給湯可能とするようにしてもよい。   In addition, after the preliminary hot water heater is activated, when the detection unit detects the set temperature or higher, the control unit stops the operation of the preliminary hot water heater and controls the switching three-way valve to shut off the switching hot water pipe. Then, the hot water supply pipe may be opened so that the hot water in the hot water storage tank can be supplied to the load again.

前記制御部は、前記切替三方弁の開閉制御を前記検知部で検知された温度に基づいて、自動的に実行するようにしてもよい。   The control unit may automatically perform opening / closing control of the switching three-way valve based on the temperature detected by the detection unit.

この構成によれば、ユーザが、切替三方弁の開閉の操作(切換えの操作)を行わなくても、設定された温度に従って適宜予備給湯器が作動する。   According to this configuration, even if the user does not perform an opening / closing operation (switching operation) of the switching three-way valve, the preliminary hot water heater is appropriately operated according to the set temperature.

また、前記切替三方弁のない構成のものと同様、前記負荷に、少なくとも風呂が含まれ、前記予備給湯器が、前記風呂に対して追い炊き機能を有し、前記制御部が予備給湯器を作動させた場合、前記制御部は、前記予備給湯器によって追い炊きさせるようにしてもよく、さらに、前記制御部が予備給湯器を作動させた場合、前記制御部は、前記風呂の湯張り及び足し湯を前記貯湯タンクから給湯させるようにしてもよい。 Further, as in the case of the configuration without the switching three-way valve, the load includes at least a bath, the spare water heater has a function of reheating the bath, and the control unit has a spare water heater. When activated, the control unit may be additionally cooked by the preliminary water heater, and further, when the control unit activates the preliminary water heater, the control unit Additional hot water may be supplied from the hot water storage tank.

なお、前記した通り、前記予備給湯器の前記流入許容圧力によって、前記切替三方弁を介在させる構成と介在させない構成の2つの構成が存在するが、予備給湯器がどのようなものであっても、汎用的に接続可能な構成であってもよい。   As described above, there are two configurations, the configuration in which the switching three-way valve is interposed and the configuration in which the switching three-way valve is not interposed, depending on the inflow allowable pressure of the preliminary water heater. A general-purpose connectable configuration may be used.

すなわち、前記貯湯タンクの二次側と前記切替三方弁との間の給湯管に、貯湯タンクからの温湯を流入させるために、流路変更三方弁を介して、前記予備給湯器に接続可能な流路変更管を接続し、前記制御部は、前記流路変更三方弁を開閉制御し、前記予備給湯器の前記流入許容圧力が、前記貯湯タンクの出湯圧力を下回る場合は、前記流路変更管側を遮断するとともに前記給湯管側を開放し、前記流入許容圧力が、前記貯湯タンクの出湯圧力と同等以上の場合は、前記流路変更管側を開放するとともに、前記流路変更三方弁と前記切替三方弁とを結ぶ給湯管側を遮断し、前記貯湯タンクから出湯する温湯の温度を第1設定温度とし、前記切替出湯管から出湯する温湯の温度を前記第1設定温度よりも低い第2設定温度として各々設定可能とし、前記検知部で検知された温度が前記第2設定温度未満の場合に、前記予備給湯器を作動させ、前記第2設定温度まで加温して前記負荷に給湯可能とする構成であってもよい。   That is, the hot water from the hot water storage tank is allowed to flow into the hot water supply pipe between the secondary side of the hot water storage tank and the switching three-way valve, and can be connected to the spare water heater via the flow path changing three-way valve. A flow path change pipe is connected, and the control unit controls opening and closing of the flow path change three-way valve, and the flow path change is performed when the allowable inflow pressure of the preliminary hot water heater is lower than the hot water discharge pressure of the hot water storage tank. When the pipe side is shut off and the hot water supply pipe side is opened, and the inflow allowable pressure is equal to or higher than the hot water discharge pressure of the hot water storage tank, the flow path change pipe side is opened, and the flow path change three-way valve The hot water pipe connecting the three-way valve and the switching three-way valve is shut off, the temperature of the hot water discharged from the hot water storage tank is set as the first set temperature, and the temperature of the hot water discharged from the switching hot water pipe is lower than the first set temperature. Each can be set as the second set temperature Even when the temperature detected by the detection unit is lower than the second set temperature, the preliminary hot water heater is operated and heated to the second set temperature so that hot water can be supplied to the load. Good.

なお、前記切替三方弁を介在させる構成と介在させない構成、さらには、前記汎用的な構成のいずれも、適合する予備給湯器を接続した構成としてもよい。主に、前記予備給湯器を接続しない構成ものは、既設の予備給湯器に接続するためのものであり、一方、予備給湯器も構成要素として含めたシステムは、新規に給湯システムを導入するためのものである。 It should be noted that the configuration in which the switching three-way valve is interposed and the configuration in which the switching three-way valve is not interposed, and further, the general-purpose configuration may be configured by connecting a suitable spare water heater. Mainly, the configuration that does not connect the spare water heater is for connecting to an existing spare water heater, while the system that includes the spare water heater as a constituent element introduces a new hot water system. belongs to.

前記ヒートポンプの還流サイクルにおいて発生する結露等の水をヒートポンプから排出するドレン排水管に、外気温が所定の温度以下になった場合に自動的に作動する外気温感知式ヒータを取り付けた構成であってもよい。 The drain drain pipe that discharges the water such as condensation generated in the reflux cycle of the heat pump from the heat pump is provided with an outside air temperature sensing heater that automatically operates when the outside air temperature becomes a predetermined temperature or lower. May be.

本発明にかかる貯湯式給湯システムは、ヒートポンプによって生成、貯湯された温湯を最大限利用しつつ、湯切れ等の不具合が生じた場合に、所望の設定温度に到達するまで予備給湯器を作動させることができるため、寒冷地などあっても、常時、効率的、効果的に所望の温度での給湯を実現することが可能になるという効果を奏する。   The hot water storage type hot water supply system according to the present invention operates the preliminary hot water heater until a desired set temperature is reached in the event of a malfunction such as running out of hot water while making maximum use of the hot water generated and stored by the heat pump. Therefore, there is an effect that hot water supply at a desired temperature can be realized efficiently and effectively all the time even in a cold district.

図1は、本発明にかかる貯湯式給湯システムの概略構成図であり、(a)は、予備給湯器が停止時の給湯の流れを示した図、(b)は、予備給湯器が作動時の給湯の流れを示した図である。FIG. 1 is a schematic configuration diagram of a hot water storage type hot water supply system according to the present invention, where (a) is a diagram showing a flow of hot water supply when a spare water heater is stopped, and (b) is a diagram when the spare water heater is in operation. It is the figure which showed the flow of hot water supply. 図2は、本発明の第1実施形態に係る貯湯式給湯システムの概略構成図である。FIG. 2 is a schematic configuration diagram of the hot water storage hot water supply system according to the first embodiment of the present invention. 図3は、本発明の第2実施形態に係る貯湯式給湯システムの概略構成図である。FIG. 3 is a schematic configuration diagram of a hot water storage type hot water supply system according to a second embodiment of the present invention. 図4は、本発明の第3実施形態に係る貯湯式給湯システムの概略構成図である。FIG. 4 is a schematic configuration diagram of a hot water storage type hot water supply system according to a third embodiment of the present invention. 図5は、本発明の第4実施形態に係る貯湯式給湯システムの概略構成図である。FIG. 5 is a schematic configuration diagram of a hot water storage type hot water supply system according to a fourth embodiment of the present invention. 図6は、本発明の第5実施形態に係る貯湯式給湯システムの概略構成図である。FIG. 6 is a schematic configuration diagram of a hot water storage type hot water supply system according to a fifth embodiment of the present invention. 図7は、本発明の第6実施形態に係る貯湯式給湯システムの概略構成図である。FIG. 7 is a schematic configuration diagram of a hot water storage type hot water supply system according to a sixth embodiment of the present invention.

図1は、本発明に係る貯湯式給湯システムの概略構成図である。図中、実線の矢印が、給湯の流れを示し、破線の矢印が、給水の流れを示す。1は、本発明に係る貯湯式給湯システムの温湯生成部である。本実施形態では、温湯生成部として、ヒートポンプを使って説明するが、これに限定する趣旨ではない。(以下、各実施形態においても同様とする。)   FIG. 1 is a schematic configuration diagram of a hot water storage type hot water supply system according to the present invention. In the figure, solid arrows indicate the flow of hot water supply, and broken arrows indicate the flow of water supply. Reference numeral 1 denotes a hot water generator of the hot water storage type hot water supply system according to the present invention. In the present embodiment, the hot water generator is described using a heat pump, but the present invention is not limited to this. (Hereinafter, the same applies to each embodiment.)

ヒートポンプ1によって生成された温湯は、貯湯タンク2(貯湯部に相当)内に貯留される。貯湯タンク2内に貯留された温湯は、負荷4の要求に応じて出湯される。ここで、「負荷」とは、需要家が利用する給湯栓を備えた設備(台所、洗面台、風呂など)をいう。 Hot water generated by the heat pump 1 is stored in a hot water storage tank 2 (corresponding to a hot water storage section). The hot water stored in the hot water storage tank 2 is discharged according to the demand of the load 4. Here, “load” means equipment (kitchen, washstand, bath, etc.) equipped with hot water taps used by consumers.

前記貯湯タンク2から出湯することによって消費された温湯量に相当する水量は、給水管5から貯湯タンク2に補給されるため、貯湯タンク2は、常時満水状態になっている。給水部5(破線矢印の流れに並行して配設)から貯湯タンク2内に水が補給されると、ヒートポンプ1によって、温湯が生成され、再び貯湯タンク2内に温湯が貯留される。 Since the amount of water corresponding to the amount of hot water consumed by discharging from the hot water storage tank 2 is replenished to the hot water storage tank 2 from the water supply pipe 5, the hot water storage tank 2 is always full. When water is supplied into the hot water storage tank 2 from the water supply unit 5 (arranged in parallel with the flow of the broken line arrow), hot water is generated by the heat pump 1, and the hot water is stored in the hot water storage tank 2 again.

貯湯タンク2から出湯する温湯の温度は、制御部3で設定する。また、 制御部3は、貯湯タンク2から設定温度Pに設定されて出湯する温湯の実際の出湯温度Hを検知するとともに、負荷4からの給湯要求に対して、設定温度Pでの給湯を制御する。 The temperature of hot water discharged from the hot water storage tank 2 is set by the control unit 3. In addition, the control unit 3 detects the actual hot water temperature H of the hot water set to the set temperature P from the hot water storage tank 2 and discharges the hot water, and controls the hot water supply at the set temperature P in response to a hot water supply request from the load 4. To do.

負荷4が、貯湯タンク2で貯留する設定温度Pの温湯量以上の量を使用すると、貯湯タンク2内に設定温度Pを満たす温湯が失われ、いわゆる「湯切れ」状態になる。貯湯式給湯システムでは、前記湯切れを起こすと、ヒートポンプ1によって温湯を生成することになるが、一般に、湯切れを起こしてから、給湯可能な温湯が生成されるまでには数時間を要するため、需要家側で温湯の使用を制限せざるを得ず、安定的な給湯が困難になるという不都合が生じる。そこで、貯湯タンク2で湯切れを起こしても、継続的に設定温度Pの温湯を供給できるように、貯湯タンク2と負荷4との間に、直圧式又は燃焼式の予備給湯器6を介在させている。 When the load 4 uses an amount equal to or higher than the hot water amount of the set temperature P stored in the hot water storage tank 2, the hot water satisfying the set temperature P is lost in the hot water storage tank 2, and a so-called “hot water out” state occurs. In the hot water storage type hot water supply system, when the hot water runs out, hot water is generated by the heat pump 1, but in general, it takes several hours until hot water that can be supplied with hot water is generated after the hot water runs out. Therefore, there is an inconvenience that it is difficult for the customer side to restrict the use of hot water and stable hot water supply becomes difficult. Therefore, even if hot water runs out in the hot water storage tank 2, a direct pressure or combustion type auxiliary hot water heater 6 is interposed between the hot water storage tank 2 and the load 4 so that hot water of the set temperature P can be continuously supplied. I am letting.

ここで、直圧式とは、熱交換パイプを備え、これに水が流れる際に、このパイプを温めて温湯を生成するものであり、給湯栓を開くと同時に、瞬時に加熱して給湯する構成になっている。また、給水圧力と出湯圧力が略同等である。一方、燃焼式とは、温湯を生成するための熱源としてガス、灯油などを使用したものをいう。いずれにしても、予備給湯器6は、貯湯式の給湯器と異なり、いわゆる湯切れすることなく、需要家が所望する温度の温湯を常時、かつ、即時供給することができるという特徴を有するものであれば、特に限定はしない。 Here, the direct pressure type includes a heat exchange pipe, and when water flows through the pipe, the pipe is warmed to generate hot water. It has become. Further, the feed water pressure and the tapping pressure are substantially equal. On the other hand, the combustion type means one using gas, kerosene or the like as a heat source for generating hot water. In any case, unlike the hot water storage type hot water heater 6, the spare water heater 6 has a feature that it can always and immediately supply hot water at a temperature desired by the customer without running out of hot water. If so, there is no particular limitation.

図1(a)で示す通り、制御部3は、出湯温度Hを検知したときに、出湯温度Hが設定温度P以上の場合、予備給湯器6を作動させずに、貯湯タンク2から出湯される温湯を通過させて負荷4に給湯するように制御する。 As shown in FIG. 1 (a), when the hot water temperature H is equal to or higher than the set temperature P when the hot water temperature H is detected, the controller 3 is discharged from the hot water storage tank 2 without operating the preliminary hot water heater 6. Control is performed so that hot water is passed through and the hot water is supplied to the load 4.

一方、図1(b)で示す通り、出湯温度Hが、設定温度P未満になった場合、貯湯タンク2から出湯される温湯は、制御部3によって作動制御された予備給湯器6によって設定温度Pに加温されてから、負荷4に給湯される。 On the other hand, as shown in FIG. 1B, when the hot water temperature H becomes lower than the set temperature P, the hot water discharged from the hot water storage tank 2 is set at the set temperature by the preliminary hot water heater 6 that is controlled by the control unit 3. After being heated to P, hot water is supplied to the load 4.

以上の通り、本発明にかかる貯湯式給湯システムは、貯湯タンク2が湯切れになるまでは、貯湯タンク2の温湯を利用し、湯切れになったときのみ、予備給湯器6を作動させる。ここで予備給湯器6が加温するのは、給水管から供給される水ではなく、湯切れ後の温湯であるため、設定温度Pに到達する時間を短縮することができる。その結果、安価な夜間料金を利用して生成した温湯を最大限利用するようにし、湯切れが発生したときにのみ、湯切れ後の温湯が不足する所望温度分だけ、予備給湯器6で加温するため、エネルギー効率も高くなり、コストを抑えつつ、所望の温度の温湯を常時提供できることになる。 As described above, the hot water storage hot water supply system according to the present invention uses the hot water in the hot water storage tank 2 until the hot water storage tank 2 runs out, and activates the auxiliary hot water heater 6 only when the hot water runs out. Here, it is not the water supplied from the water supply pipe but the hot water after the hot water is exhausted that the preliminary water heater 6 is heated. Therefore, the time for reaching the set temperature P can be shortened. As a result, the hot water generated by using the cheap night-time charge is used as much as possible, and only when a hot water break occurs, the spare hot water heater 6 adds only the desired temperature for the hot water after the hot water is insufficient. Since it warms, energy efficiency also becomes high and hot water of desired temperature can always be provided, suppressing cost.

以下、図2から図7を使って本発明の具体的な実施形態について説明する。 Hereinafter, specific embodiments of the present invention will be described with reference to FIGS.

<第1実施形態>
図2で示す通り、本実施形態で説明するシステムは、負荷4として、いわゆる風呂釜を除く負荷設備41(具体的には、台所、洗面台等)専用の給湯システムである。負荷設備41は、41a、41b及び41cなどのように、複数の負荷設備から構成されている。
<First Embodiment>
As shown in FIG. 2, the system described in the present embodiment is a hot water supply system dedicated to a load facility 41 (specifically, a kitchen, a washstand, etc.) excluding a so-called bath tub as the load 4. The load facility 41 includes a plurality of load facilities such as 41a, 41b, and 41c.

ヒートポンプ1は、ファン11を備え、外気を取り込むため、屋外に設置されている。本実施形態では、貯湯タンク2に対して、ヒートポンプ1側を一次側といい、負荷4側を二次側という(以下、各実施形態についても同様とする)。 The heat pump 1 includes a fan 11 and is installed outdoors to take in outside air. In the present embodiment, the heat pump 1 side is referred to as a primary side and the load 4 side is referred to as a secondary side with respect to the hot water storage tank 2 (hereinafter, the same applies to each embodiment).

ファン11によって取り込まれた外気の熱エネルギーから、熱交換器12を介して冷媒を暖めて、コンプレッサ13で圧縮される。冷媒は、圧縮されることにより、熱交換器12で前記熱エネルギーを取り込んだときよりも、高温になる。高温になった冷媒を、冷媒流路14を介して水熱交換器15に送り込み、加温領域Eにて、貯湯タンク2側の水に熱エネルギーを転移する。 The refrigerant is warmed through the heat exchanger 12 from the heat energy of the outside air taken in by the fan 11 and compressed by the compressor 13. The refrigerant is heated to a higher temperature than when the heat energy is taken in by the heat exchanger 12. The high-temperature refrigerant is sent to the water heat exchanger 15 via the refrigerant flow path 14, and heat energy is transferred to the water on the hot water storage tank 2 side in the heating region E.

前記転移後の冷媒は、膨張弁16によって膨張され、低温となり、熱交換器12に送り込まれる。上記ファン11から膨張弁16までの還流サイクルを繰り返すことにより、貯湯タンク2に温湯が常時供給され、安定的な給湯が可能となる。 The refrigerant after the transfer is expanded by the expansion valve 16, becomes a low temperature, and is sent to the heat exchanger 12. By repeating the reflux cycle from the fan 11 to the expansion valve 16, hot water is always supplied to the hot water storage tank 2 and stable hot water supply is possible.

貯湯タンク2は、タンク本体21と、ヒートポンプ1の加温領域Eで前記熱エネルギーの転移を受け、生成された温湯をタンク本体21に供給する供給管22と、供給管22からタンク本体21に前記温湯を供給する供給口23と、タンク本体21内に貯留された温湯を二次側で負荷4に給湯する出湯口24と、出湯口24から出湯した温湯を給湯する給湯管25と、タンク本体21から前記出湯によって消費された湯量に相当する水を補給する給水口26と、前記給水された水を供給管22に送水する送水口27とから構成される。 The hot water storage tank 2 receives the transfer of the thermal energy in the heating area E of the heat pump 1 from the tank main body 21, the supply pipe 22 that supplies the generated hot water to the tank main body 21, and the supply pipe 22 to the tank main body 21. A supply port 23 for supplying hot water, a hot water outlet 24 for supplying hot water stored in the tank body 21 to the load 4 on the secondary side, a hot water supply pipe 25 for supplying hot water discharged from the hot water outlet 24, and a tank The main body 21 includes a water supply port 26 that supplies water corresponding to the amount of hot water consumed by the hot water, and a water supply port 27 that supplies the supplied water to the supply pipe 22.

前記の通り、供給口23から供給される温湯と給水口26から給水される水とが同一のタンク本体21内に流入するが、比重の違いによって、下方が低温層W、上方が高温層Hとなり、低温層Wと高温層Hとの間に両者の中間温度帯の中温層Mが形成され、三者が混合せずに、層構造を維持している。従って、タンク本体21は、例えば、縦長の円筒形状のものから成り、上部に供給口23と出湯口24を設け、下部に給水口26と送水口27を設ける構成とするのが好ましい。 As described above, the hot water supplied from the supply port 23 and the water supplied from the water supply port 26 flow into the same tank body 21, but due to the difference in specific gravity, the lower side is the low temperature layer W and the upper side is the high temperature layer H. Thus, an intermediate temperature layer M between the low temperature layer W and the high temperature layer H is formed, and the three layers maintain the layer structure without mixing. Therefore, it is preferable that the tank main body 21 is made of, for example, a vertically long cylindrical shape, and is provided with a supply port 23 and a hot water outlet 24 in the upper portion and a water supply port 26 and a water supply port 27 in the lower portion.

高温層H側の温湯は、出湯口24から給湯管25に接続された予備給湯器6に流入する。一方、低温層W側の水は、給水部5の貯湯タンク側給水管51から給水口26を介して貯湯タンク本体21に流入する。 The hot water on the high temperature layer H side flows from the hot water outlet 24 into the auxiliary hot water heater 6 connected to the hot water supply pipe 25. On the other hand, the water on the low temperature layer W side flows into the hot water storage tank body 21 from the hot water storage tank side water supply pipe 51 of the water supply unit 5 through the water supply port 26.

予備給湯器6は、給湯器本体61と予備系出湯管62から構成され、前記流入した温湯は、給湯器本体61内に配設されている配管(図示せず)を介して予備系出湯管62から流出する。 The spare water heater 6 is composed of a hot water heater body 61 and a spare hot water outlet pipe 62, and the hot water that has flowed in is connected to a spare hot water outlet pipe via a pipe (not shown) disposed in the hot water heater body 61. 62 flows out.

予備系出湯管62から温湯は、給水部5の負荷側給水管52と合流し、負荷4に給湯される。なお、負荷41a乃至41cの端末には、混合栓が取り付けられており(図示せず)、需要家の所望の温度で給湯される。 Hot water from the standby hot water outlet pipe 62 merges with the load-side water supply pipe 52 of the water supply section 5 and is supplied to the load 4. In addition, the mixing stopper is attached to the terminal of load 41a thru | or 41c (not shown), and hot water is supplied at the temperature desired by the consumer.

図1で説明したように、予備給湯器6は、制御部3によって、予め設定された設定温度よりも、貯湯タンク2から出湯する出湯温度が所定温度低くなった場合に、作動するように制御されている。なお、制御部3は、予備給湯器6の作動制御のほか、給湯温度の設定、貯湯タンク2内の湯量の演算等を実行する。 As described with reference to FIG. 1, the preliminary water heater 6 is controlled by the control unit 3 so as to operate when the temperature of the hot water discharged from the hot water storage tank 2 becomes lower than a preset temperature by a predetermined temperature. Has been. In addition to the operation control of the auxiliary hot water heater 6, the control unit 3 sets the hot water supply temperature, calculates the amount of hot water in the hot water storage tank 2, and the like.

制御部3は、少なくとも、演算処理部31と、貯湯タンク2の出湯温度を検知する温度センサ32と、温度設定部33、34とから構成されている。演算処理部31は、例えば、前記各種制御、演算実行を行う組込プログラム、メモリ、ROM、RAMなどから構成される。メモリは、後述する温度設定部33から入力された設定情報を記憶する。また、ROMは、各種の運転プログラムを格納し、RAMは、前記演算処理の過程で生成される各種データを一時的に保存する。温度設定部33、34は、液晶ディスプレイ等の入力部を有し、前記温度設定のほか、貯湯タンク2内のステータスを表示する(温度設定部は、貯湯タンク2から出湯する温湯と予備給湯器6から出湯する温湯の2つがあるため、2つ併設しているが、1つに統合したものであってもよい。また、演算処理部31は、図面上、1つであるが、前記温度設定部に対応して2つのものを併設するものであってもよい)。なお、温度センサ32は、便宜的に図面上は、タンク本体21から離隔した単体のものを示しているが、実際には、前記した低温層W、中温層M及び高温層Hの各々の温度を検知し、演算処理部31に出力するように構成することが好ましい。温度センサ32は、より具体的には公知のサーミスタを使用すればよい。 The control unit 3 includes at least an arithmetic processing unit 31, a temperature sensor 32 that detects a tapping temperature of the hot water storage tank 2, and temperature setting units 33 and 34. The arithmetic processing unit 31 includes, for example, an embedded program that performs the various controls and arithmetic operations, a memory, a ROM, a RAM, and the like. The memory stores setting information input from a temperature setting unit 33 described later. The ROM stores various operation programs, and the RAM temporarily stores various data generated in the process of the arithmetic processing. The temperature setting units 33 and 34 have an input unit such as a liquid crystal display, and display the status in the hot water storage tank 2 in addition to the temperature setting (the temperature setting unit includes hot water discharged from the hot water storage tank 2 and a spare water heater). There are two hot waters that are discharged from the hot water bath 6. However, two hot water baths may be integrated into one, and there may be one arithmetic processing unit 31 in the drawing. There may be provided two units corresponding to the setting unit). For convenience, the temperature sensor 32 is shown as a single unit separated from the tank main body 21 in the drawing, but actually, the temperature of each of the low temperature layer W, the intermediate temperature layer M, and the high temperature layer H is actually described. Is preferably detected and output to the arithmetic processing unit 31. More specifically, the temperature sensor 32 may be a known thermistor.

温度設定部33で、貯湯タンク2から出湯する温湯の設定温度を第1設定温度とし、予備系出湯管62から出湯する温湯の設定温度を第1設定温度よりも低い第2設定温度とし、温度センサ32で検知された温度が第2設定温度未満になった場合、制御部3は、予備給湯器6を作動させて、第2設定温度まで加温して前記負荷に給湯する。例えば、第1設定温度を50度に設定し、第2設定温度を45度に設定すると、貯湯タンク2から出湯する温湯の温度が、45度以上の場合は、予備給湯器6は作動せず、前記温湯を加温しないまま負荷4に給湯される。一方、貯湯タンク2から出湯する温湯の温度が、40度で検知されると、制御部3は、予備給湯器6を作動させ、貯湯タンク2から出湯する温湯を差分の5度分だけ加温し、45度で出湯する。 In the temperature setting unit 33, the set temperature of the hot water discharged from the hot water storage tank 2 is set as the first set temperature, and the set temperature of the hot water discharged from the standby hot water discharge pipe 62 is set as the second set temperature lower than the first set temperature. When the temperature detected by the sensor 32 becomes lower than the second set temperature, the control unit 3 operates the preliminary water heater 6 to heat up to the second set temperature and supply hot water to the load. For example, if the first set temperature is set to 50 degrees and the second set temperature is set to 45 degrees, the temperature of the hot water discharged from the hot water storage tank 2 is 45 degrees or more, the spare water heater 6 does not operate. The hot water is supplied to the load 4 without heating. On the other hand, when the temperature of the hot water discharged from the hot water storage tank 2 is detected at 40 degrees, the control unit 3 operates the preliminary hot water heater 6 to heat the hot water discharged from the hot water storage tank 2 by a difference of 5 degrees. And take out the hot water at 45 degrees.

なお、予備給湯器6が作動している間、ヒートポンプ1が稼働して温湯を生成し、貯湯タンク2に、第1設定温度(上記例で50度)に到達した温湯が出湯可能な状態で貯留されたことを温度センサ32が検知すると、予備給湯器6の作動を停止し、負荷4側の出湯要求があった場合には、再び貯湯タンク2から出湯した温湯を予備給湯器6の加温なしに給湯するようにしてもよい。 While the hot water heater 6 is operating, the heat pump 1 operates to generate hot water, and the hot water that has reached the first set temperature (50 degrees in the above example) can be discharged into the hot water storage tank 2. When the temperature sensor 32 detects that the hot water has been stored, the operation of the hot water heater 6 is stopped, and when there is a hot water discharge request on the load 4 side, the hot water discharged from the hot water storage tank 2 is again added to the hot water heater 6. You may make it supply hot water without temperature.

予備給湯器6の作動条件を第1設定温度未満とすると、予備給湯器6を頻繁に作動させなければならず、却ってエネルギー効率の低下を招くことになる。とくに、前記予備給湯器6の作動後、前記の通り、貯湯タンク2内の温湯の温度が第1設定温度以上になる都度停止すると、前記作動と停止を高頻度で繰り返すことになり、予備給湯器6に、未燃ガスが滞留し、異常着火等、動作不良の原因となる。そこで、前記貯湯タンクから出湯する温湯の温度、すなわち、第1設定温度と、前記予備給湯器が作動する温度、すなわち、第2設定温度との間に所定の温度差を設けている。 If the operating condition of the preliminary water heater 6 is lower than the first set temperature, the preliminary water heater 6 must be operated frequently, and on the contrary, the energy efficiency is reduced. In particular, after the operation of the hot water heater 6, as described above, if the hot water in the hot water storage tank 2 is stopped each time the temperature becomes equal to or higher than the first set temperature, the operation and the stop are repeated frequently. Unburned gas stays in the vessel 6 and causes malfunction such as abnormal ignition. Therefore, a predetermined temperature difference is provided between the temperature of the hot water discharged from the hot water storage tank, that is, the first set temperature, and the temperature at which the preliminary water heater operates, that is, the second set temperature.

寒冷地の場合、冬季は、外気の影響により、貯湯タンク2内の温度低下が早まり、さらには、使用する湯量が増える傾向にある。そこで、上記のような温度設定によって、予備給湯器6を必要最小限で作動させることにより、所望の温度で温湯を安定供給するとともに、貯湯タンク2内の温湯を最大限使用することにより、温湯生成に要するコストを抑えることできる。 In the case of a cold region, in winter, the temperature in the hot water storage tank 2 rapidly decreases due to the influence of outside air, and furthermore, the amount of hot water used tends to increase. Therefore, by operating the auxiliary water heater 6 with the minimum necessary temperature as described above, the hot water is stably supplied at a desired temperature, and the hot water in the hot water storage tank 2 is used to the maximum, The cost required for generation can be suppressed.

なお、予備給湯器6は、本発明にかかる貯湯式給湯システムの設置時に、接続した形態で提供するもののほか、既設のものを接続する形態であってもよい。以下、各実施形態においても、予備給湯器6をシステムの構成要素として予め組み込むものと、既設の予備給湯器6を接続可能とするもの(すなわち、構成要素として予備給湯器6を含まないもの)との2つの形態が提供可能である。 In addition, the spare water heater 6 may be in a form in which an existing one is connected in addition to the one provided in the connected form when the hot water storage type hot water system according to the present invention is installed. Hereinafter, also in each embodiment, the pre-water heater 6 that is incorporated in advance as a component of the system and the existing hot-water heater 6 that can be connected (that is, the spare water heater 6 is not included as a component) And two forms can be provided.

ところで、前記した通り、ヒートポンプ1は、屋外に設置するため、通常、架台17の上に設置する。そして、前記ヒートポンプ1の還流サイクルにおいて、温度差による結露が生じる。そこで、これを排出するために、通常、ドレン排水管(図示せず)を接続するが、寒冷地の場合、冬季にドレン排水管が凍結し、前記結露の排出不能となることを回避するために、一般に、設置業者は、ドレン排水管を接続しないようにしている。しかし、ドレン排水管を接続しないと、架台17近傍に排水されることになり、腐食による設置不安定化、さらには動作不良の原因となる。本発明にかかる貯湯式給湯システムは、温度検知が重要なポイントの一つであるため、ヒートポンプ1の動作不良、特に、寒冷地における冬季の動作不良の原因の除去は重要となる。そこで、ドレン排水管を接続したうえで、外気温が所定の温度以下になった場合に自動的に作動する外気温感知式ヒータ(図示せず)を取り付けるようにすればよい。寒冷地の冬季であっても、外気温はドレン排水管が凍結しない気温の場合もある。そこで、外気温感知式とすることにより、冬季に常時通電させるヒータよりも節電効果が期待できる(以下、各実施形態についても同様に、ドレン排水管を接続し、外気温感知式ヒータを設置することは可能である)。 By the way, as above-mentioned, since the heat pump 1 is installed outdoors, it is normally installed on the mount frame 17. And in the reflux cycle of the heat pump 1, condensation occurs due to a temperature difference. Therefore, in order to discharge this, a drain drain pipe (not shown) is usually connected. However, in the case of a cold region, in order to avoid the drain drain pipe being frozen in the winter season, the condensation cannot be discharged. In general, installers do not connect drain drains. However, if the drain drain pipe is not connected, it will be drained in the vicinity of the gantry 17, which will cause unstable installation due to corrosion and further cause malfunction. Since temperature detection is one of the important points in the hot water storage hot water supply system according to the present invention, it is important to eliminate the cause of malfunction of the heat pump 1, particularly in winter in cold regions. Therefore, after connecting the drain drain pipe, an outside air temperature sensing heater (not shown) that automatically operates when the outside air temperature becomes a predetermined temperature or lower may be attached. Even in winter in cold regions, the outside air temperature may be a temperature at which the drain drain pipe does not freeze. Therefore, by adopting an outside air temperature detection type, a power saving effect can be expected compared to a heater that is always energized in winter (hereinafter, similarly to each embodiment, a drain drain pipe is connected and an outside air temperature detection type heater is installed. Is possible).

<第2実施形態>
図3は、負荷4に、風呂42が含まれる場合の形態を示したものである。なお、以下、第1実施形態と同様の構成要素については、同一の符号を付しており、特に、付加する説明がない限り、その詳細な説明は省略する。
Second Embodiment
FIG. 3 shows a form in which the bath 4 is included in the load 4. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted unless particularly added.

本実施形態では、予備給湯器6は、風呂42の追い炊き機能を有する。すなわち、図示しない吸い上げポンプにより、温度が下がった風呂42の温湯が、送り管63を介して予備給湯器本体61に送り込まれる。前記送り込まれた温湯は、予備給湯器6で加温された後、戻り管64を介して風呂42に給湯される。 In the present embodiment, the spare water heater 6 has a function of additionally cooking the bath 42. That is, the hot water of the bath 42 whose temperature has been lowered is fed into the auxiliary hot water heater main body 61 through the feed pipe 63 by a suction pump (not shown). The sent hot water is heated by the preliminary water heater 6 and then supplied to the bath 42 via the return pipe 64.

一方、風呂の湯張り及び足し湯は、貯湯タンク2に接続された給湯管25から分岐して接続された風呂用給湯管28を介して給湯される。従って、風呂の湯張り及び足し湯は、貯湯タンク2が第1設定温度未満の場合であっても、風呂用給湯管28で給湯され、不足する温度についてのみ、予備給湯器6の追い炊きによって加温される。第2設定温度未満であっても、貯湯タンクの温湯を使用し、予備給湯器6で追い炊きする構成とした方が、湯張り及び足し湯も含めた給湯を予備給湯器6にすべてに代替させるよりも全体的な熱効率が良いからである。 On the other hand, the hot water of the bath and the hot water are supplied through a hot water supply pipe 28 branched from the hot water supply pipe 25 connected to the hot water storage tank 2. Accordingly, even if the hot water tank 2 is less than the first set temperature, the hot water filling and the additional hot water of the bath are supplied by the hot water supply pipe 28 for the bath, and only the shortage of the temperature is obtained by the additional cooking of the spare water heater 6. It is warmed. Even if the temperature is lower than the second set temperature, the hot water in the hot water storage tank is used and the additional hot water is added to the spare water heater 6 instead of the hot water filling and the additional hot water. This is because the overall thermal efficiency is better than that.

<第3実施形態>
図4は、給湯管25と負荷4との間に、切替三方弁7を設け、切替三方弁7と予備給湯器6とは、切替出湯管66によって接続されている。
<Third Embodiment>
In FIG. 4, a switching three-way valve 7 is provided between the hot water supply pipe 25 and the load 4, and the switching three-way valve 7 and the spare water heater 6 are connected by a switching hot water pipe 66.

既設の予備給湯器6を使用すると、予備給湯器6の流入許容圧力が、貯湯タンク2の出湯圧力よりも低い場合もある。例えば、貯湯タンク2の出湯圧力が180kPa超で、予備給湯器6の流入許容圧力が、80kPaの場合、貯湯タンク2から予備給湯器6に温湯が流入すると、予備給湯器6内の缶体、配管などが過剰な圧力に曝されるため、損傷するおそれがあり、水漏れ等の原因になる。近年、水道圧に近い出湯圧力を備えた貯湯式給湯システムが存在する一方、いわゆるセミ貯湯式石油給湯器(この形態の給湯器は、燃焼系を備えており、前記予備給湯器の定義に合致する。)の流入許容圧力は高くても190kPaであり、水道減圧式を採用している。従って、前記のような組み合わせ、すなわち、出湯圧力が高圧の貯湯式給湯システムとセミ貯湯式石油給湯器とを接続する構成の場合、セミ貯湯式石油給湯器側の設備を損傷するおそれがある。 If the existing hot water heater 6 is used, the inflow allowable pressure of the hot water heater 6 may be lower than the hot water pressure of the hot water storage tank 2. For example, when the hot water pressure in the hot water storage tank 2 is over 180 kPa and the allowable inflow pressure of the preliminary hot water heater 6 is 80 kPa, when hot water flows from the hot water tank 2 into the preliminary hot water heater 6, Since piping and the like are exposed to excessive pressure, they may be damaged, causing water leakage and the like. In recent years, while hot water storage hot water supply systems with hot water pressure close to tap water pressure exist, so-called semi hot water storage type oil water heaters (this type of hot water heater has a combustion system and meets the definition of the preliminary hot water heater. The allowable pressure of inflow is as high as 190 kPa, and a water supply pressure reduction type is adopted. Therefore, in the case of the above-described combination, that is, the configuration in which the hot water storage hot water supply system having a high tapping pressure is connected to the semi hot water storage type oil hot water supply, there is a risk of damaging the facilities on the semi hot water storage type oil hot water supply side.

そこで、貯湯タンク2から出湯する温湯の温度が第1設定温度以上の場合は、制御部3が、切替三方弁7の7aから7c方向の流れを開放するとともに、7aから7bの流れを遮断するように開閉制御することにより、貯湯タンク2から出湯する温湯がそのまま負荷4に給湯される。 Therefore, when the temperature of the hot water discharged from the hot water storage tank 2 is equal to or higher than the first set temperature, the control unit 3 opens the flow of the switching three-way valve 7 in the directions 7a to 7c and cuts off the flow of 7a to 7b. By controlling the opening and closing in this manner, the hot water discharged from the hot water storage tank 2 is supplied to the load 4 as it is.

一方、貯湯タンク2から出湯する温湯の温度が第2設定温度未満の場合は、制御部3が、切替三方弁7の7aから7c方向の流れを遮断するとともに、7bから7cの流れを開放するように開閉制御することにより、貯湯タンク2から出湯する温湯が予備給湯器6に流入することを阻止し、予備給湯器6から、切替出湯管66を介して負荷4に温湯が給湯される。 On the other hand, when the temperature of the hot water discharged from the hot water storage tank 2 is lower than the second set temperature, the control unit 3 blocks the flow of the switching three-way valve 7 in the direction 7a to 7c and opens the flow of 7b to 7c. By controlling the opening and closing in this manner, hot water discharged from the hot water storage tank 2 is prevented from flowing into the spare water heater 6, and hot water is supplied from the spare water heater 6 to the load 4 via the switching hot water pipe 66.

予備給湯器6から給湯される場合は、予備給湯器6に給水が必要になるため、貯湯タンク側給水管51から分岐した予備給湯側給水管65から給水すればよい。 When hot water is supplied from the preliminary hot water heater 6, it is necessary to supply water from the preliminary hot water supply pipe 65 branched from the hot water storage tank side water supply pipe 51, since water needs to be supplied to the preliminary hot water heater 6.

また、制御部3は、予備給湯器6が作動後、検知部32が第1設定温度以上を検知すると、再度、予備給湯器6の作動を停止するとともに、切替三方弁7の7aから7cを開放するとともに、切替三方弁7の7aから7bの流れを遮断し、給湯管25から貯湯タンク2の温湯をそのまま負荷4に給湯する。 In addition, when the detection unit 32 detects the first set temperature or higher after the preliminary water heater 6 is activated, the control unit 3 again stops the operation of the preliminary water heater 6 and switches the switching three-way valve 7 from 7a to 7c. While opening, the flow of the switching three-way valve 7 from 7a to 7b is interrupted, and the hot water in the hot water storage tank 2 is supplied to the load 4 as it is from the hot water supply pipe 25.

制御部3は、切替三方弁7の前記各開閉制御を温度センサ32で検知された温度に基づいて、自動的に実行するようにしてもよい。本実施の形態では、切替三方弁7は、前記自動的な開閉制御に対応可能なように、電磁三方弁としている。なお、制御部31(具体的には、温度設定部33、34のディスプレイ)で、温度センサ32で検知された温度を表示するとともに、切替三方弁7の開閉制御を促すメッセージを表示し(メッセージは、文字表記のほか、音声によるものでもよい。)、需要家がマニュアルで三方弁7の開閉を行うようにしてもよい。 The control unit 3 may automatically execute the opening / closing control of the switching three-way valve 7 based on the temperature detected by the temperature sensor 32. In the present embodiment, the switching three-way valve 7 is an electromagnetic three-way valve so as to be compatible with the automatic opening / closing control. The control unit 31 (specifically, the display of the temperature setting units 33 and 34) displays the temperature detected by the temperature sensor 32 and a message prompting the opening / closing control of the switching three-way valve 7 (message) May be written by voice in addition to textual notation.) Alternatively, the consumer may manually open and close the three-way valve 7.

<実施形態4>
図5は、負荷4に、少なくとも風呂42が含まれ、予備給湯器6が、風呂42に対して追い炊き機能を有し、制御部3が予備給湯器6を作動させた場合、制御部3は、予備給湯器6によって追い炊きさせる形態を示したものである。後述する実施形態5との違いは、予備給湯器6が作動して追い炊きした場合は、貯湯タンク2からの給湯は完全に遮断されないという点である。
<Embodiment 4>
In FIG. 5, when the load 4 includes at least the bath 42, the spare water heater 6 has a function of additionally cooking with respect to the bath 42, and the controller 3 operates the spare water heater 6, the controller 3 Shows a form in which the hot water is additionally cooked by the spare water heater 6. A difference from Embodiment 5 described later is that hot water supply from the hot water storage tank 2 is not completely shut off when the auxiliary hot water heater 6 is operated to perform additional cooking.

<実施形態5>
図6は、制御部3が予備給湯器6を作動させた場合、風呂42の湯張り及び足し湯を貯湯タンク2から給湯させるように制御部3によって流路制御させる形態を示したものである。この形態は、第2実施形態について、第3実施形態のように、予備給湯器6の流入許容圧力が、貯湯タンク2の出湯圧力よりも低い場合に適用可能な変形例である。
<Embodiment 5>
FIG. 6 shows a mode in which the control unit 3 controls the flow path so that the hot water of the bath 42 and the additional hot water are supplied from the hot water storage tank 2 when the control unit 3 operates the spare water heater 6. . This embodiment is a modification that can be applied to the second embodiment when the allowable inflow pressure of the preliminary water heater 6 is lower than the hot water pressure of the hot water storage tank 2 as in the third embodiment.

<実施形態6>
図7は、実施形態2と実施形態5の双方に適用可能な汎用性のある形態を示したものである。
<Embodiment 6>
FIG. 7 shows a versatile mode applicable to both the second embodiment and the fifth embodiment.

すなわち、貯湯タンク2の二次側と切替三方弁7との間の給湯管25に、貯湯タンク2からの温湯を流入させるために、流路変更三方弁8を介して、予備給湯器6に接続可能な流路変更管67を接続したものである。 That is, in order to allow hot water from the hot water storage tank 2 to flow into the hot water supply pipe 25 between the secondary side of the hot water storage tank 2 and the switching three-way valve 7, the auxiliary hot water heater 6 is connected via the flow path changing three-way valve 8. A connectable flow path changing pipe 67 is connected.

実施形態2のように、予備給湯器6の流入許容圧力が、貯湯タンク2の出湯圧力と同等以上の場合は、制御部3は、流路変更三方弁8の8aから8bの流れを開放するとともに、分岐三方弁7の7aから7cの流れを遮断する。この場合、実施形態2と同様の構成になる。 As in the second embodiment, when the inflow allowable pressure of the preliminary hot water heater 6 is equal to or higher than the hot water pressure of the hot water storage tank 2, the control unit 3 opens the flow of the flow path changing three-way valve 8 from 8a to 8b. At the same time, the flow of the branch three-way valve 7 from 7a to 7c is cut off. In this case, the configuration is the same as that of the second embodiment.

一方、実施形態5のように、予備給湯器6の流入許容圧力が、貯湯タンク2の出湯圧力よりも低い場合は、制御部3は、流路変更三方弁8の8aから8bの流れを遮断するとともに、分岐三方弁7の7aから7cの流れを開放する。この場合、実施形態5と同様の構成になる。 On the other hand, as in the fifth embodiment, when the allowable inflow pressure of the auxiliary hot water heater 6 is lower than the hot water pressure of the hot water storage tank 2, the control unit 3 blocks the flow of the flow path changing three-way valve 8 from 8a to 8b. At the same time, the flow of the branch three-way valve 7 from 7a to 7c is released. In this case, the configuration is the same as that of the fifth embodiment.

本実施形態は、例えば、予備給湯器6を故障等で交換する場合に、前記流入許容圧力と貯湯タンク2の出湯圧力との高低関係によって、配管構成を変更する等の作業をすることなく、交換設置可能な汎用性のあるものを示したものである。 In the present embodiment, for example, when the hot water heater 6 is replaced due to a failure or the like, without performing work such as changing the piping configuration depending on the height relationship between the allowable pressure of inflow and the hot water pressure of the hot water storage tank 2, It shows a versatile one that can be replaced.

1 ヒートポンプ
11 ファン
12 熱交換器
13 コンプレッサ
14 冷媒流路
15 水熱交換器
16 膨張弁
17 架台
2 貯湯タンク
21 貯湯タンク本体
22 供給管
23 供給口
24 出湯口
25 給湯管
26 給水口
27 送水口
3 制御部
31 演算処理部
32 温度センサ
33、34 温度設定部
4 負荷
41 負荷設備
42 風呂
5 給水部
51 貯湯タンク側給水管
52 負荷側給水管
6 予備給湯器
61 予備給湯器本体
62 予備系出湯管
63 送り管
64 戻り管
65 予備給湯側給水管
66 切替出湯管
67 流路変更管
7 切替三方弁
8 流路変更三方弁
DESCRIPTION OF SYMBOLS 1 Heat pump 11 Fan 12 Heat exchanger 13 Compressor 14 Refrigerant flow path 15 Water heat exchanger 16 Expansion valve 17 Base 2 Hot water storage tank 21 Hot water storage tank main body 22 Supply pipe 23 Supply port 24 Hot water outlet 25 Hot water supply pipe 26 Water supply port 27 Water supply port 3 Control unit 31 Arithmetic processing unit 32 Temperature sensor 33, 34 Temperature setting unit 4 Load 41 Load facility 42 Bath 5 Water supply unit 51 Hot water storage tank side water supply pipe 52 Load side water supply pipe 6 Spare water heater 61 Spare water heater body 62 Spare system hot water pipe 63 Feeding pipe 64 Return pipe 65 Preliminary hot water supply pipe 66 Switching hot water pipe 67 Flow path changing pipe 7 Switching three-way valve 8 Flow path changing three-way valve

すなわち、本発明にかかる貯湯式給湯システムであって、
給水された水から温湯を生成する温湯生成部と、
前記生成された温湯を貯留し、給湯管を介して前記温湯を負荷に出湯するする貯湯部と、
前記供給管と前記負荷との間に、少なくとも、直圧式又は燃焼式の予備給湯器を接続可能とする予備系出湯管と、
前記貯湯部内の温湯の温度を検知する検知部と、
前記貯湯部から出湯する温湯を所定の温度に設定し、前記予備給湯器及び予備系出湯管を介して、前記負荷に給湯するとともに、前記検知部で検知された温度が、前記設定された所定の温度未満の場合に、前記予備給湯器を作動させ、所定の温度に加温した温湯を生成して前記負荷に給湯する制御部と、
を有する。
That is, in the hot water storage hot water supply system according to the present invention,
A hot water generator that generates hot water from the supplied water;
A hot water storage section for storing the generated hot water and discharging the hot water to a load via a hot water supply pipe;
Between the supply pipe and the load, at least a preliminary hot water outlet pipe that can connect a direct pressure type or combustion type preliminary hot water heater;
A detection unit for detecting the temperature of the hot water in the hot water storage unit;
Hot water discharged from the hot water storage unit is set to a predetermined temperature, hot water is supplied to the load via the preliminary hot water supply device and a standby hot water discharge pipe, and the temperature detected by the detection unit is set to the predetermined predetermined temperature. A controller that activates the preliminary water heater to generate hot water heated to a predetermined temperature and supply hot water to the load,
That it has a.

そして、前記温湯生成部が、外気の熱エネルギーを吸収した冷媒を圧縮し、熱交換器を介して還流させるヒートポンプから構成され、前記貯湯部が、一次側が前記熱交換器によって生成された温湯の供給管に接続され、二次側が前記温湯を複数の前記負荷に送湯する給湯管に接続された貯湯タンクから構成され、前記制御部は、前記貯湯タンクから出湯する温湯の温度を第1設定温度とし、前記予備系出湯管から出湯する温湯の温度を前記第1設定温度よりも低い第2設定温度として各々設定可能とし、前記検知部で検知された温度が前記第2設定温度未満の場合に、前記予備給湯器を作動させ、前記第2設定温度まで加温して前記負荷に給湯可能とすることを最も主要な特徴とする。The hot water generator is composed of a heat pump that compresses the refrigerant that has absorbed the heat energy of the outside air and recirculates it through a heat exchanger, and the hot water storage section is a hot water generated by the heat exchanger on the primary side. The hot water storage tank is connected to a supply pipe, and a secondary side is connected to a hot water supply pipe for supplying the hot water to the plurality of loads, and the control unit first sets a temperature of the hot water discharged from the hot water storage tank. When the temperature of the hot water discharged from the standby hot water discharge pipe can be set as a second set temperature lower than the first set temperature, and the temperature detected by the detection unit is less than the second set temperature In addition, the main feature is that the preliminary water heater is operated and heated to the second set temperature to enable hot water supply to the load.

この構成によれば、前記予備給湯器が稼働するのは、貯湯タンクに蓄えられている温湯が、ユーザが所望する設定温度未満の場合(いわゆる「湯切れ」の場合)であるため、当該設定温度が維持されている限り、専ら貯湯タンクの温湯が供給され、電気料金が安価な夜間料金によって生成された温湯を最大限利用することが可能になる。According to this configuration, the hot water heater is operated when the hot water stored in the hot water storage tank is lower than the set temperature desired by the user (in the case of so-called “hot water out”). As long as the temperature is maintained, the hot water in the hot water storage tank is exclusively supplied, and it is possible to make maximum use of the hot water generated by the night charge at a low electricity charge.

さらに、前記貯湯タンクから出湯する温湯の温度、すなわち、第1設定温度と、前記予備給湯器が作動する温度、すなわち、第2設定温度との間に所定の温度差を設けることにより、前記予備給湯器を第1設定温度よりも低下する都度作動させ、前記予備給湯器の作動の頻繁な繰り返すことを阻止することができる。







Furthermore, the temperature of hot water for hot water from the hot water storage tank, namely, a first set temperature, the temperature at which the pre-water heater is activated, i.e., by Rukoto provided a predetermined temperature difference between the second set temperature, the The preliminary water heater can be operated each time it falls below the first set temperature, and frequent repetition of the operation of the preliminary water heater can be prevented.







Claims (14)

生成された温湯を貯留してから給湯する貯湯式給湯システムであって、
給水された水から温湯を生成する温湯生成部と、
前記生成された温湯を貯留し、給湯管を介して前記温湯を負荷に出湯するする貯湯部と、
前記供給管と前記負荷との間に、少なくとも、直圧式又は燃焼式の予備給湯器を接続可能とする予備系出湯管と、
前記貯湯部内の温湯の温度を検知する検知部と、
前記貯湯部から出湯する温湯を所定の温度に設定し、前記予備給湯器及び予備系出湯管を介して、前記負荷に給湯するとともに、前記検知部で検知された温度が、前記設定された所定の温度未満の場合に、前記予備給湯器を作動させ、所定の温度に加温した温湯を生成して前記負荷に給湯する制御部と、
を有することを特徴とする貯湯式式給湯システム。
A hot water storage hot water supply system for storing hot water after storing the generated hot water,
A hot water generator that generates hot water from the supplied water;
A hot water storage section for storing the generated hot water and discharging the hot water to a load via a hot water supply pipe;
Between the supply pipe and the load, at least a preliminary hot water outlet pipe that can connect a direct pressure type or combustion type preliminary hot water heater;
A detection unit for detecting the temperature of the hot water in the hot water storage unit;
Hot water discharged from the hot water storage unit is set to a predetermined temperature, hot water is supplied to the load via the preliminary hot water supply device and a standby hot water discharge pipe, and the temperature detected by the detection unit is set to the predetermined predetermined temperature. A controller that activates the preliminary water heater to generate hot water heated to a predetermined temperature and supply hot water to the load,
A hot water storage type hot water supply system characterized by comprising:
前記温湯生成部が、外気の熱エネルギーを吸収した冷媒を圧縮し、熱交換器を介して還流させるヒートポンプから構成され、前記貯湯部が、一次側が前記熱交換器によって生成された温湯の供給管に接続され、二次側が前記温湯を複数の前記負荷に送湯する給湯管に接続された貯湯タンクから構成され、前記制御部は、前記貯湯タンクから出湯する温湯の温度を第1設定温度とし、前記予備系出湯管から出湯する温湯の温度を前記第1設定温度よりも低い第2設定温度として各々設定可能とし、前記検知部で検知された温度が前記第2設定温度未満の場合に、前記予備給湯器を作動させ、前記第2設定温度まで加温して前記負荷に給湯可能とすることを特徴とする請求項1記載の貯湯式給湯システム。 The hot water generation unit is composed of a heat pump that compresses the refrigerant that has absorbed the thermal energy of the outside air and recirculates it through a heat exchanger, and the hot water storage unit has a hot water supply pipe whose primary side is generated by the heat exchanger. And a secondary side is connected to a hot water supply pipe for supplying the hot water to the plurality of loads, and the control unit sets the temperature of the hot water discharged from the hot water tank as a first set temperature. The temperature of the hot water discharged from the standby hot water discharge pipe can be set as a second set temperature lower than the first set temperature, respectively, and when the temperature detected by the detection unit is less than the second set temperature, 2. The hot water storage type hot water supply system according to claim 1, wherein the hot water heater is operated and heated up to the second set temperature to enable hot water supply to the load. 前記制御部は、前記予備給湯器の 作動後、検知部が第1設定温度以上を検知すると、前記予備給湯器の作動を停止すること特徴とする請求項2記載の貯湯式給湯システム。 3. The hot water storage hot water supply system according to claim 2, wherein after the operation of the preliminary water heater, the control unit stops the operation of the preliminary water heater when the detection unit detects a first set temperature or higher. 前記負荷に、少なくとも風呂が含まれ、前記予備給湯器が、前記風呂に対して追い炊き機能を有し、前記制御部が前記予備給湯器を作動させた場合、前記制御部は、前記風呂の湯張り及び足し湯を前記貯湯タンクから給湯させるとともに、前記予備給湯器によって追い炊きさせることを特徴とする請求項2又は請求項3に記載の貯湯式給湯システム。   When the load includes at least a bath, the spare water heater has a function of reheating the bath, and the control unit operates the spare water heater, the control unit The hot water storage type hot water supply system according to claim 2 or 3, wherein hot water and additional hot water are supplied from the hot water storage tank, and are additionally cooked by the preliminary hot water heater. 前記予備系出湯管に前記予備給湯器を接続したことを特徴とする請求項1から請求項4までのいずれか1項に記載の貯湯式給湯システム。   The hot water storage hot water supply system according to any one of claims 1 to 4, wherein the preliminary hot water heater is connected to the preliminary hot water discharge pipe. ヒートポンプによって生成された温湯を給湯する貯湯式給湯システムであって、
外気の熱エネルギーを吸収した冷媒を圧縮し、熱交換器を介して還流させるヒートポンプと、
一次側が前記熱交換器によって生成された温湯の供給管に接続され、二次側が前記温湯を複数の負荷に送湯 する給湯管に接続された貯湯タンクと、
前記供給管と前記負荷との間に設けられた切替三方弁と、水又は温湯の流入許容圧力が、前記貯湯タンクの出湯圧力を下回る直圧式又は燃焼式の予備給湯器とを接続可能とする切替出湯管と、
前記貯湯タンク内の温湯の温度を検知する検知部と、
前記貯湯タンクから出湯する温湯の温度を設定し、前記検知部が検知した温度が、 前記設定温度未満の場合は、前記給湯管から温湯の給湯を遮断するとともに、前記予備給湯器を作動させ、所定の温度に加温した温湯を生成し、前記切替出湯管から前記負荷に温湯を給湯するように、前記切替三方弁を開閉制御する制御部と、
を有することを特徴とする貯湯式給湯システム。
A hot water storage system that supplies hot water generated by a heat pump,
A heat pump that compresses the refrigerant that has absorbed the heat energy of the outside air and recirculates it through the heat exchanger;
A hot water storage tank having a primary side connected to a hot water supply pipe generated by the heat exchanger, and a secondary side connected to a hot water supply pipe for feeding the hot water to a plurality of loads;
A switching three-way valve provided between the supply pipe and the load can be connected to a direct-pressure or combustion-type pre-water heater whose inflow allowable pressure of water or hot water is lower than the tapping pressure of the hot water storage tank. Switching hot water pipes,
A detector for detecting the temperature of hot water in the hot water storage tank;
Set the temperature of hot water discharged from the hot water storage tank, and when the temperature detected by the detection unit is less than the set temperature, shut off the hot water supply from the hot water supply pipe and operate the preliminary water heater, A controller that generates hot water heated to a predetermined temperature and controls the opening and closing of the switching three-way valve so as to supply hot water to the load from the switching hot water pipe;
A hot water storage hot water supply system characterized by comprising:
前記制御部は、予備給湯器作動後、検知部が前記設定温度以上を検知すると、前記予備給湯器の作動を停止するとともに、前記切替三方弁を開閉制御し、前記切替出湯管を遮断し、前記給湯管を開放して、貯湯タンクの温湯を負荷に給湯可能とすること特徴とする請求項6記載の貯湯式給湯システム。 The control unit, after the operation of the preliminary water heater, when the detection unit detects the set temperature or more, the operation of the preliminary water heater is stopped, the switching three-way valve is controlled to open and shut off the switching hot water pipe, The hot water storage hot water supply system according to claim 6, wherein the hot water supply pipe is opened so that hot water in the hot water storage tank can be supplied to the load. 前記制御部は、前記切替三方弁の開閉制御を前記検知部で検知された温度に基づいて、自動的に実行することを特徴とする請求項6又は請求項7に記載の貯湯式給湯システム。   The hot water storage hot water supply system according to claim 6 or 7, wherein the control unit automatically performs opening / closing control of the switching three-way valve based on the temperature detected by the detection unit. 前記負荷に、少なくとも風呂が含まれ、前記予備給湯器が、前記風呂に対して追い炊き機能を有し、前記制御部が予備給湯器を作動させた場合、前記制御部は、前記予備給湯器によって追い炊きさせることを特徴とする請求項6から請求項8までのいずれか1項に記載の貯湯式給湯システム。   In the case where the load includes at least a bath, the spare water heater has a function of reheating the bath, and the control unit operates the spare water heater, the control unit The hot water storage type hot water supply system according to any one of claims 6 to 8, wherein the hot water is cooked by cooking. 前記制御部が予備給湯器を作動させた場合、前記制御部は、前記風呂の湯張り及び足し湯を前記貯湯タンクから給湯させることを特徴とする請求項9記載の貯湯式給湯システム。   The hot water storage hot water supply system according to claim 9, wherein when the control unit activates a preliminary hot water heater, the control unit supplies hot water from the bath and hot water from the hot water storage tank. 前記切替出湯管に前記予備給湯器を接続したことを特徴とする請求項6から請求項10までのいずれか1項に記載の貯湯式給湯システム。   The hot water storage hot water supply system according to any one of claims 6 to 10, wherein the auxiliary hot water heater is connected to the switching hot water discharge pipe. 前記貯湯タンクの二次側と前記切替三方弁との間の給湯管に、貯湯タンクからの温湯を流入させるために、流路変更三方弁を介して、前記予備給湯器に接続可能な流路変更管を接続し、前記制御部は、前記流路変更三方弁を開閉制御し、前記予備給湯器の前記流入許容圧力が、前記貯湯タンクの出湯圧力を下回る場合は、前記流路変更管側を遮断するとともに前記給湯管側を開放し、前記流入許容圧力が、前記貯湯タンクの出湯圧力と同等以上の場合は、前記流路変更管側を開放するとともに、前記流路変更三方弁と前記切替三方弁とを結ぶ給湯管側を遮断し、前記貯湯タンクから出湯する温湯の温度を第1設定温度とし、前記切替出湯管から出湯する温湯の温度を前記第1設定温度よりも低い第2設定温度として各々設定可能とし、前記検知部で検知された温度が前記第2設定温度未満の場合に、前記予備給湯器を作動させ、前記第2設定温度まで加温して前記負荷に給湯可能とすることを特徴とする貯湯式給湯システム。 A flow path that can be connected to the spare water heater via a flow path changing three-way valve to allow hot water from the hot water storage tank to flow into a hot water supply pipe between the secondary side of the hot water tank and the switching three-way valve. A change pipe is connected, and the control unit controls the opening and closing of the flow path change three-way valve, and when the allowable inflow pressure of the preliminary water heater is lower than the hot water discharge pressure of the hot water storage tank, the flow path change pipe side The hot water supply pipe side is opened, and when the inflow allowable pressure is equal to or higher than the hot water discharge pressure of the hot water storage tank, the flow path change pipe side is opened, and the flow path change three-way valve and the The hot water supply pipe side connecting to the switching three-way valve is shut off, the temperature of the hot water discharged from the hot water storage tank is set as a first set temperature, and the temperature of the hot water discharged from the switching hot water discharge pipe is lower than the first set temperature. Each temperature can be set as a preset temperature. When the temperature detected by the section is lower than the second set temperature, the hot water heater is operated to warm up to the second set temperature and to supply hot water to the load. system. 前記切替出湯管に前記予備給湯器を接続したことを特徴とする請求項6から請求項12までのいずれか1項に記載の貯湯式給湯システム。     The hot water storage hot water supply system according to any one of claims 6 to 12, wherein the preliminary hot water heater is connected to the switching hot water discharge pipe. 前記ヒートポンプの還流サイクルにおいて発生する結露等の水をヒートポンプから排出するドレン排水管に、外気温が所定の温度以下になった場合に自動的に作動する外気温感知式ヒータを取り付けたことを特徴とする請求項1から請求項13までのいずれか1項に記載の貯湯式給湯システム。

An outside air temperature sensing heater that automatically operates when the outside air temperature becomes a predetermined temperature or less is attached to a drain drain pipe that discharges water such as condensation generated in the reflux cycle of the heat pump from the heat pump. The hot water storage hot water supply system according to any one of claims 1 to 13.

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Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57196936U (en) * 1981-06-09 1982-12-14
JP2002277056A (en) * 2001-03-22 2002-09-25 Osaka Gas Co Ltd Hot-water supplying system
JP2003240345A (en) * 2002-02-15 2003-08-27 Osaka Gas Co Ltd Waste heat recovery hot water supply system
JP2006214619A (en) * 2005-02-02 2006-08-17 Osaka Gas Co Ltd Hot-water supply device
JP2009150635A (en) * 2007-11-27 2009-07-09 Denso Corp Hot-water supply system
JP2009270751A (en) * 2008-05-06 2009-11-19 Denso Corp Hot water supply device
JP2010281531A (en) * 2009-06-05 2010-12-16 Rinnai Corp Storage type hot water supply system and cogeneration system
JP2011179747A (en) * 2010-03-01 2011-09-15 Mitsubishi Electric Corp Drainage system and heat pump type apparatus or storage water heater including the same
JP2012032061A (en) * 2010-07-29 2012-02-16 Osaka Gas Co Ltd Heat supply equipment
JP2012127635A (en) * 2010-12-17 2012-07-05 Panasonic Corp Hot water supply system
JP2013092286A (en) * 2011-10-25 2013-05-16 Noritz Corp Latent heat recovery type combustion device
JP2015048996A (en) * 2013-09-02 2015-03-16 リンナイ株式会社 Hot water supply system
KR20150081945A (en) * 2014-01-07 2015-07-15 린나이코리아 주식회사 Hot water supply heating system
JP2016084978A (en) * 2014-10-27 2016-05-19 株式会社ノーリツ Storage hot water supply system
JP2016180539A (en) * 2015-03-24 2016-10-13 株式会社ノーリツ Storage water heater
JP2017009215A (en) * 2015-06-24 2017-01-12 株式会社ノーリツ Auxiliary heat source machine
JP2017072345A (en) * 2015-10-09 2017-04-13 リンナイ株式会社 Heating device
JP2017122541A (en) * 2016-01-07 2017-07-13 三菱電機株式会社 Water heater

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57196936U (en) * 1981-06-09 1982-12-14
JP2002277056A (en) * 2001-03-22 2002-09-25 Osaka Gas Co Ltd Hot-water supplying system
JP2003240345A (en) * 2002-02-15 2003-08-27 Osaka Gas Co Ltd Waste heat recovery hot water supply system
JP2006214619A (en) * 2005-02-02 2006-08-17 Osaka Gas Co Ltd Hot-water supply device
JP2009150635A (en) * 2007-11-27 2009-07-09 Denso Corp Hot-water supply system
JP2009270751A (en) * 2008-05-06 2009-11-19 Denso Corp Hot water supply device
JP2010281531A (en) * 2009-06-05 2010-12-16 Rinnai Corp Storage type hot water supply system and cogeneration system
JP2011179747A (en) * 2010-03-01 2011-09-15 Mitsubishi Electric Corp Drainage system and heat pump type apparatus or storage water heater including the same
JP2012032061A (en) * 2010-07-29 2012-02-16 Osaka Gas Co Ltd Heat supply equipment
JP2012127635A (en) * 2010-12-17 2012-07-05 Panasonic Corp Hot water supply system
JP2013092286A (en) * 2011-10-25 2013-05-16 Noritz Corp Latent heat recovery type combustion device
JP2015048996A (en) * 2013-09-02 2015-03-16 リンナイ株式会社 Hot water supply system
KR20150081945A (en) * 2014-01-07 2015-07-15 린나이코리아 주식회사 Hot water supply heating system
JP2016084978A (en) * 2014-10-27 2016-05-19 株式会社ノーリツ Storage hot water supply system
JP2016180539A (en) * 2015-03-24 2016-10-13 株式会社ノーリツ Storage water heater
JP2017009215A (en) * 2015-06-24 2017-01-12 株式会社ノーリツ Auxiliary heat source machine
JP2017072345A (en) * 2015-10-09 2017-04-13 リンナイ株式会社 Heating device
JP2017122541A (en) * 2016-01-07 2017-07-13 三菱電機株式会社 Water heater

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