JPS62172153A - Antifreezing device for hot-water supplier - Google Patents

Abstract

PURPOSE:To prevent breakage of the titled device due to freezing by a method wherein the connecting port of feed water is provided with a suction valve, while the connecting port of supplying hot-water is provided with a low-temperature operating valve and a water passing circuit is provided with an automatic water extracting valve at the lowest part, in addition to an electric heater. CONSTITUTION:An antifreezing heater 1c is attached to a heat exchanger, the antifreezing heater 1e is attached to an automatic water extracting valve 12 and a bimetal switch 2 is fixed to a water stream switch 5. A water passing circuit is provided with a suction valve 10, the delivery port of supplying hot-water is provided with a low-temperature operating valve 11 and the lowest part of the water passing circuit is provided with an automatic water extracting valve 12 utilizing a diaphragm valve. When a temperature in a machine is reduced to the ON setting temperature of the bimetal switch 2, the antifreezing heaters 1a, 1b, 1c, 1d, 1e are conducted to keep the temperature of the water passing circuit. In case they are not conducted, the low-temperature operating valve 11 is opened when water temperature is reduced whereby water beings to flow through the water passing circuit in the machine and freezing is prevented. When an antifreezing water feeding cock 8 is closed and a hot-water supplying cock 9 is opened, the pressure of water in the machine is reduced and a non-return valve 13, the automatic water extracting valve 12 and the suction valve 10 are opened whereby remaining water is discharged through the automatic water extracting valve 12.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は給湯機の凍結による機具の破損防止の構成に関
するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a structure for preventing damage to water heater equipment due to freezing.

従来の技術 近年、給湯機の凍結防止手段は通水回路部に取り付けら
れた電気ヒータによって通水部および機内を保温する構
成とされている。BACKGROUND OF THE INVENTION In recent years, anti-freeze means for water heaters have been designed to keep the water passage section and the inside of the machine warm by means of an electric heater attached to the water passage circuit section.

以下図面を参照しながら上述した従来の給湯機の一例に
ついて説明する。An example of the conventional water heater mentioned above will be described below with reference to the drawings.

第２図は従来のガス給湯機の凍結防止装置の構成を示す
ものである。第２図において、１ａ。FIG. 2 shows the structure of a conventional antifreeze device for a gas water heater. In FIG. 2, 1a.

１ｂ、ｌｃは凍結防止ヒータ、２はバイメタルスイッチ
で凍結防止ヒータ［ａ、１ｂ、１ｃと直列に結線され、
電子制御部７に接続されている。また凍結防止ヒータ１
ａ、１ｂ、１ｃはそれぞれ入口および出口通水パイプ４
ａ、４ｂと熱交換器３に取り付けられている。バイメタ
ルスイッチ２は水流を検出する水流スイッチ部５または
入口通水パイプ４ａの一部に固定されている。６ａ、６
ｂは水抜栓、８は不凍給水栓、または給水元栓、９は給
湯栓である。1b and lc are anti-freeze heaters, 2 is a bimetal switch and is an anti-freeze heater [connected in series with a, 1b and 1c,
It is connected to the electronic control section 7. Also, antifreeze heater 1
a, 1b, and 1c are inlet and outlet water pipes 4, respectively.
a, 4b and the heat exchanger 3. The bimetal switch 2 is fixed to a water flow switch section 5 for detecting water flow or a part of the inlet water pipe 4a. 6a, 6
b is a water drain valve, 8 is an antifreeze faucet or water supply faucet, and 9 is a hot water supply faucet.

以上のように構成されたガス給湯機の凍結防止構成につ
いて、以下その動作について説明する。The operation of the freeze prevention structure of the gas water heater configured as described above will be described below.

まず常温の状態ではバイメタルスイッチ２はＯＦＦとな
っており凍結防止ヒータ１ａ、１ｂ。First, at room temperature, the bimetal switch 2 is OFF, and the antifreeze heaters 1a and 1b are turned off.

１ｃには通′ｍされていない。外気温が下がり給湯機内
の温度がバイメタルスイッチ２の○”設定温度になると
凍結防止ヒータ１ａ、Ｉｂ、ｌｃに通電され、水が充満
されている通水回路部を保温して凍結による機具の破損
を防止する。It is not communicated to 1c. When the outside temperature drops and the temperature inside the water heater reaches the set temperature of the bimetal switch 2, the antifreeze heaters 1a, Ib, and lc are energized to keep the water-filled water circuit warm and prevent equipment damage due to freezing. prevent.

発明が解決しようとする問題点 しかしながら上記のような構成では、停電時や電源プラ
グを抜いた時およびヒータ回路故障で通電しない時に外
気温が凍結温度に達すると通水回路部の水が凍結して機
具が破損するという問題点を有していた。またこの状態
で破損を防止するためには不凍給水栓８（または給水栓
）を閉じ、水抜栓５ａ、５ｂを開ける操作を必要とする
問題点を有していた。Problems to be Solved by the Invention However, with the above configuration, if the outside temperature reaches freezing temperature during a power outage, when the power plug is unplugged, or when the heater circuit malfunctions and the power is not turned on, the water in the water flow circuit will freeze. The problem was that the equipment was damaged. In addition, in order to prevent damage in this state, there is a problem in that it is necessary to close the antifreeze faucet 8 (or faucet) and open the drain valves 5a and 5b.

本発明はこのような従来の問題点を解消するものであり
、どのような状態においても凍結による破損を防止する
給湯機を提供するものである。The present invention solves these conventional problems and provides a water heater that prevents damage due to freezing under any conditions.

問題点を解決するための手段 上記問題点を解決するために本発明の給湯機は、従来の
電気ヒータに加え、給水接続口に吸気弁を、給湯接続口
に低温作動弁および通水回路の最下部に自動水抜弁を設
けた構成としたものである。Means for Solving the Problems In order to solve the above problems, the water heater of the present invention includes, in addition to the conventional electric heater, an intake valve at the water supply connection port, a low-temperature operating valve at the hot water supply connection port, and a water flow circuit. It has an automatic drain valve at the bottom.

作　　用 本発明は上記した構成によって停電時、給水栓が開いた
ままになっている場合、外気温および水温が下がると低
温作動弁が開いて水を排出し続け、凍結を防止する。ま
た試運転終了後、電源プラグを抜き給水元栓を閉じた場
合においても、外気温および水温が下がると低温作動弁
が開き、機内の圧力が下がると自動水抜弁が作動して機
内の残留水を排出して凍結破損を防止し、電源が入って
いない状態であっても何ら操作する必要なく機具の凍結
破損を防止することとなる。According to the above-described structure, the present invention prevents freezing by opening the low-temperature operation valve to continue discharging water when the outside air temperature and water temperature drop when the water tap is left open during a power outage. In addition, even if the power plug is removed and the water supply tap is closed after the trial run, the low-temperature operation valve will open when the outside air temperature and water temperature drop, and the automatic drain valve will operate when the pressure inside the machine drops, draining the remaining water inside the machine. This prevents freezing damage to the equipment without requiring any operation even when the power is off.

実施例 以下本発明の一実施例のガス給湯機について、図面を参
照しながら説明する。第１図は本発明のガス給湯機の凍
結破損防止の構成を示すものである。第１図において１
　ａ、１ｂ、１　ｃ、ｌｄ、ｌｅは直列に接続した凍結
防止ヒータで、バイメタルスイッチ２と直列に結線され
、電子制御部７に接続されている。そして、凍結防止ヒ
ータ１ａ。EXAMPLE Hereinafter, a gas water heater according to an example of the present invention will be described with reference to the drawings. FIG. 1 shows the structure of the gas water heater according to the present invention to prevent damage from freezing. In Figure 1, 1
a, 1b, 1c, ld, and le are antifreeze heaters connected in series, which are connected in series with the bimetal switch 2 and connected to the electronic control section 7. And antifreeze heater 1a.

１ｂ、Ｉｄはそれぞれ通水回路を形成する入口の通水パ
イプ４ａ、出口の通水パイプ４ｂ、水抜の通水パイプ４
ｄに、凍結防止ヒータ１ｃは熱交換器に、凍結防止ヒー
タ１ｅは自動水抜弁１２にそれぞれ取り付けられている
。バイメタルスイッチ２は水量調節および水流を検出す
る水流スイッチ部５に固定されている。上記通水回路に
おいては給水入口部にボール弁を利用した逆止弁となっ
た吸気弁１０と、給湯出口部には低温作動弁１１が設け
られ、通水回路の最下部にダイヤフラム弁を利用した自
動水抜弁１２が設けられ、水量調節および水流スイッチ
部５に入る前に通水パイプ４ｄによって一次圧力がかか
るように接続され、逆比弁１３８介して通水パイプ４ａ
に接続されている。1b and Id are an inlet water pipe 4a, an outlet water pipe 4b, and a drain water pipe 4, which form a water flow circuit, respectively.
d, the antifreeze heater 1c is attached to the heat exchanger, and the antifreeze heater 1e is attached to the automatic drain valve 12, respectively. The bimetal switch 2 is fixed to a water flow switch section 5 that adjusts the amount of water and detects the water flow. In the water supply circuit, an intake valve 10 which is a check valve using a ball valve is provided at the water supply inlet, a low temperature operation valve 11 is provided at the hot water supply outlet, and a diaphragm valve is provided at the bottom of the water supply circuit. An automatic drain valve 12 is provided, which is connected to the water flow pipe 4d to apply primary pressure before entering the water flow rate adjustment and water flow switch section 5, and is connected to the water flow pipe 4a via a reverse ratio valve 138.
It is connected to the.

以上のように構成されたガス給湯機においてその動作を
説明する。まず通常ガス給湯機を使用する場合、水圧が
かかった状態では吸気弁１０、自動水抜弁１２、逆止弁
１３は閉じられ、自動水抜弁１２の回路（水抜の通水パ
イプ４ｄ、自動水抜弁１２、逆止弁１３までの回路）で
は水は充満されてはいるが通水は行なわれず、水は水量
調節および水流スイッチ部５から熱交換器３を通り、易
となって給湯栓９より出る。なお自動水抜弁１２は水流
スイッチ部５が動作する市にダイヤフラム弁が閉じる設
定となっている。The operation of the gas water heater configured as described above will be explained. First, when using a normal gas water heater, the intake valve 10, automatic water drain valve 12, and check valve 13 are closed when water pressure is applied, and the circuit of the automatic water drain valve 12 (water drain pipe 4d, automatic water drain valve 12, the circuit up to the check valve 13) is filled with water, but no water is flowing through it, and the water passes from the water volume adjustment and water flow switch section 5 to the heat exchanger 3, and then is easily discharged from the hot water tap 9. Get out. The automatic drain valve 12 is set so that the diaphragm valve closes when the water flow switch section 5 operates.

次に凍結防止を行なう動作について説明する。Next, the operation for preventing freezing will be explained.

まず、電源が入っている状態では、機内温度が下がり、
バイメタルスイッチ２のＯＮ設定温度（約５°Ｃ）にな
ると凍結防止ヒータｌａ、ｔｂ、１ｃ。First, when the power is on, the temperature inside the machine drops,
When the ON setting temperature of bimetal switch 2 (approximately 5°C) is reached, antifreeze heaters la, tb, and 1c are turned on.

１ｄ、１ｅに通電され、水が充満している通水回路のそ
れぞれの部分を保温して凍結による破損を防止する。1d and 1e are energized to keep each part of the water circuit filled with water warm to prevent damage due to freezing.

次に停電時や凍結防止ヒータ回路が故障し通電できなか
った場合、不凍給水栓または給水元栓Ｓは開けたままで
給湯栓９を閉じているときには、外気温および水温が低
下すると低温作動弁１１が聞き、これより小量の水が流
出してぢ１具内の通水回路に水が流れ始め、通水するこ
とによって凍結を防止する。また寒冷地に見られるよう
に、屋内に不凍給水栓がある場合、停電時等には、不凍
給水栓８を閉じ、給湯栓９を開けると、機内の水圧が低
くなって、逆止弁１３、自動水抜弁１２および吸気弁１
０が開き、機内の通水回路中の残留水を自動水抜弁１２
より排出するため、屋内で容易に水抜きができ凍結破損
を防止することができる。Next, in the event of a power outage or when the anti-freezing heater circuit is broken and power cannot be supplied, if the anti-freezing hydrant or water main tap S is left open and the hot water tap 9 is closed, when the outside air temperature and water temperature drop, the low-temperature operating valve 11 When this happens, a small amount of water flows out and water begins to flow into the water circuit inside the device, preventing freezing by passing water through it. In addition, if there is an anti-freeze water tap indoors, as is the case in cold regions, if the anti-freeze water tap 8 is closed and the hot water tap 9 is opened in the event of a power outage, the water pressure inside the aircraft will drop and the water will not return. Valve 13, automatic drain valve 12 and intake valve 1
Automatic drain valve 12 opens and removes residual water in the water circuit inside the machine.
Because it drains more water, it can be easily drained indoors and prevents freezing damage.

更に、未入居の家にガス給湯機を設置し、試運転終了後
、電源プラグを抜き、不凍給水栓または給水元栓８およ
び給湯栓９を閉じた状態で放置した場合であっても、外
気温が下がると低温作動弁１１が開いて少量の水を排出
し、機内の水圧が下がって逆止弁１３、自動水抜弁１２
および吸気弁１０が開いて機内の残留水を自動水抜栓よ
り排出して凍結による機具の破損を防止することができ
る。Furthermore, even if a gas water heater is installed in an unoccupied house, and after the trial run is completed, the power plug is unplugged and the anti-freeze faucet or water supply faucet 8 and hot water faucet 9 are left closed, the outside temperature may change. When the water pressure drops, the low-temperature operation valve 11 opens and discharges a small amount of water, and the water pressure inside the machine drops, causing the check valve 13 and automatic drain valve 12 to open.
Then, the intake valve 10 opens and the residual water inside the machine is drained from the automatic drain valve, thereby preventing damage to the machine due to freezing.

発明の効果 以上のように本発明は従来の凍結防止用の電気ヒータに
加えて、自動水抜弁、吸気弁および低温作動弁を設ける
ことにより、あらゆる条件、状態にあっても使用者が水
抜きなどの凍結予防操作をすることなく、器具の凍結に
よる破損を防止することができる。Effects of the Invention As described above, the present invention provides an automatic water drain valve, an intake valve, and a low-temperature operating valve in addition to the conventional electric heater for freezing prevention, so that the user can drain water under any conditions and conditions. It is possible to prevent equipment from being damaged due to freezing without having to perform freeze prevention operations such as

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の実施例における正面構成図、第２図は
従来例における正面構成図である。 １　ａ、　　１　ｂ、　Ｉ　Ｃ，１ｄ、　　１　ｅ−−
凍結防止ヒータ、２・・・・・・バイメタルスイッチ、
３・・・・・・熱交に％器、４ａ、４ｂ、４ｄ・・・・
・・通水パイプ、１ｏ・・・・・・吸気弁、１１・・・
・・・低温作動弁、１２・・・・・・自動水抜弁。 代理人の氏名　弁理士　中　尾　敏　男　はが１名／ａ
、　／″ＩＣ−−一　凍結前止と−ク／４　／ａ ？−−−　へ′イメタルスイ・ｌす ３−−−Ｐ！？交１（各 ４、角化−−−色水、パイプ ６−＄、量−節ＲＪワ°水ＪＬ入１ツ八ゆ６−−−ホ、
伊、々た ７−−−宅す會Ｊ警？邦 δ−−−千凍開棲圧は袷ｌμ挫 ／／−−−イＬｉ作初ザト ｌｚ・−自動水抜弁 ／Ｊ・−ξ止弁 第２図FIG. 1 is a front configuration diagram of an embodiment of the present invention, and FIG. 2 is a front configuration diagram of a conventional example. 1 a, 1 b, IC, 1 d, 1 e--
Freeze prevention heater, 2...bimetal switch,
3... Heat exchanger, 4a, 4b, 4d...
...Water pipe, 1o...Intake valve, 11...
...Low temperature operation valve, 12...Automatic drain valve. Name of agent: Patent attorney Toshio Nakao, 1 person/a
, /''IC--1 Freezing pre-stop and -ku/4 /a ?--- He'imetal sui lsu 3---P!? Cross 1 (each 4, keratinization---colored water, pipe 6 -$, Amount - Section RJ Wa ° Water JL 1 piece 8 Yu 6 --- E,
Italy, Tata 7 --- House meeting J police? Country δ --- Chizu's opening pressure is 1μ failure / --- Li Li's first production lz -- Automatic drain valve / J -- ξ Stop valve Fig. 2

Claims (1)

【特許請求の範囲】[Claims] 給湯機内の通水パイプおよび熱交換器に取り付けられた
凍結防止ヒータと、前記凍結防止ヒータを作動せしめる
バイメタルスイッチと、前記通水パイプへの給水入口部
に設け、通常は水圧で閉成している吸気弁と、前記通水
パイプの給湯出口部に設け、凍結前の低温で開く低温作
動弁と、前記通水パイプを含む給湯機内の通水回路の最
下部に設けた自動水抜弁とを備えた給湯機の凍結防止装
置。An anti-freeze heater attached to the water pipe and heat exchanger in the water heater, a bimetal switch that activates the anti-freeze heater, and a bimetallic switch installed at the water supply inlet to the water pipe, which is normally closed by water pressure. a low-temperature operating valve that is installed at the hot water outlet of the water pipe and opens at a low temperature before freezing; and an automatic water drain valve that is installed at the lowest part of the water circuit in the water heater that includes the water pipe. Equipped with an antifreeze device for water heaters.