JP2562697B2 - Hot water heating system - Google Patents
Hot water heating systemInfo
- Publication number
- JP2562697B2 JP2562697B2 JP1294708A JP29470889A JP2562697B2 JP 2562697 B2 JP2562697 B2 JP 2562697B2 JP 1294708 A JP1294708 A JP 1294708A JP 29470889 A JP29470889 A JP 29470889A JP 2562697 B2 JP2562697 B2 JP 2562697B2
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- temperature
- heat exchanger
- water
- radiator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Steam Or Hot-Water Central Heating Systems (AREA)
Description
【発明の詳細な説明】 (イ)産業上の利用分野 この発明はバーナにて加熱される熱交換器の温水を放
熱器へポンプで循環して暖房を行う温水暖房装置に関す
る。Description: (a) Field of Industrial Application The present invention relates to a hot water heating apparatus that circulates hot water of a heat exchanger heated by a burner to a radiator by a pump for heating.
(ロ)従来の技術 この種の温水暖房装置は、例えば特公昭63−15493号
公報に開示されているように、温水タンク、循環ポンプ
及び熱交換器を有する温水回路と、熱交換器を加熱する
バーナ等を内蔵した熱源機と、放熱器及び送風ファンを
内蔵した室内機とを備え、熱源機の温水回路と放熱器と
を配管で環状に接続して温水循環路を形成したものが知
られている。そして、放熱器側に設けられた制御装置の
運転信号によってバーナと循環ポンプを運転させ、熱交
換器の温水を放熱器に循環して室内の暖房が行われるよ
うにしている。(B) Conventional Technology As disclosed in, for example, Japanese Patent Publication No. 63-15493, a hot water heating device of this type heats a hot water circuit having a hot water tank, a circulation pump and a heat exchanger, and a heat exchanger. It is known that a heat source unit with a built-in burner, etc., and an indoor unit with a radiator and blower fan are built in, and the hot water circuit of the heat source unit and the radiator are connected in an annular shape by piping to form a hot water circulation path. Has been. Then, the burner and the circulation pump are operated by the operation signal of the control device provided on the radiator side, and the warm water of the heat exchanger is circulated to the radiator to heat the room.
(ハ)発明が解決しようとする課題 ところで、上述した温水暖房装置では、凍結を防止す
るためにプロピレン・グリコールやエチレン・グリコー
ル等の不凍液を水と混ぜ、これを循環水として使用して
いた。しかしながら、このような循環水を用いると、不
凍液が高価であるばかりでなく、不凍液と水との配分が
難しいため、工事費や維持費が高くなる問題があった。
もちろん、循環水として主に水を使用し、凍結危険時に
は循環ポンプとバーナを作動させるようにすれば、この
ような問題は解消されるが、凍結危険時にはバーナが頻
繁に作動し、燃費が高くなる欠点があった。(C) Problems to be Solved by the Invention By the way, in the above-described hot water heater, an antifreeze liquid such as propylene glycol or ethylene glycol is mixed with water to prevent freezing, and this is used as circulating water. However, when such circulating water is used, not only the antifreeze liquid is expensive, but also the distribution of the antifreeze liquid and water is difficult, which causes a problem that construction costs and maintenance costs are high.
Of course, if water is mainly used as circulating water and the circulation pump and burner are operated in case of freezing danger, such a problem will be solved, but in the case of freezing danger, the burner will operate frequently and fuel consumption will be high. There was a drawback.
この発明は上述した事実に鑑みてなされたものであ
り、循環水に水を用いても、燃費を極力抑えながら循環
水の凍結が防止できるようにすることを目的とする。The present invention has been made in view of the above-described facts, and an object of the present invention is to prevent freezing of circulating water while suppressing fuel consumption as much as possible even when water is used as the circulating water.
(ニ)課題を解決するための手段 この発明では、バーナにて加熱される熱交換器、放熱
器、温水タンクを順に配管で環状に接続して形成した温
水循環路と、温水タンク内の温水をこの温水循環路中で
熱交換器→放熱器→温水タンク→前記熱交換器の順に循
環させる循環ポンプとを有し、放熱器側の運転信号によ
ってバーナと循環ポンプを運転させるようにした温水暖
房装置において、外気温を検出する外気温センサと、温
水循環路中で熱交換器と放熱器とをつなぐ配管内を流れ
る温水の水温を検出できるように取り付けられた水温セ
ンサと、運転信号がないときで、かつ、外気温センサの
検出温度が氷点近くのある温度以下のときに循環ポンプ
を運転させる第1の制御手段と、運転信号がないとき
で、かつ、水温センサの検出温度が氷点近くのある温度
以下のときにバーナを運転させる第2の制御手段とを備
えた構成である。(D) Means for Solving the Problems In the present invention, a hot water circulation passage formed by sequentially connecting a heat exchanger heated by a burner, a radiator, and a hot water tank in an annular shape with pipes, and hot water in the hot water tank In this hot water circulation path, there is a heat exchanger, a radiator, a hot water tank, and a circulation pump that circulates in the order of the heat exchanger, and the hot water is adapted to operate the burner and the circulation pump according to the operation signal from the radiator. In the heating device, an outside air temperature sensor that detects the outside air temperature, a water temperature sensor that is attached so as to detect the water temperature of the hot water flowing in the pipe that connects the heat exchanger and the radiator in the hot water circulation path, and the operation signal First control means for operating the circulation pump when the temperature detected by the outside air temperature sensor is below a certain temperature near the freezing point, and when there is no operation signal and when the temperature detected by the water temperature sensor is at the freezing point. near And a second control means for operating the burner at a certain temperature or lower.
また、この発明では、バーナにて加熱される熱交換
器、放熱器、温水タンクを順に配管で環状に接続して形
成した温水循環路と、温水タンク内の温水をこの温水循
環路中で熱交換器→放熱器→温水タンク→前記熱交換器
の順に循環させる循環ポンプとを有し、放熱器側の運転
信号によってバーナと循環ポンプを運転させるようにし
た温水暖房装置において、外気温を検出する外気温セン
サと、温水循環路中で熱交換器と放熱器とをつなぐ配管
内を流れる温水の水温を検出できるように取り付けられ
た水温センサと、運転信号がないときで、かつ、外気温
センサの検出温度が氷点近くのある温度以下のときに循
環ポンプを運転させる第1の制御手段と、運転信号がな
いときで、かつ、水温センサの検出温度が氷点近くのあ
る温度以下のときにバーナを運転させる第2の制御手段
と、運転信号があるときで、かつ、水温センサの検出温
度が沸点近くのある温度以上のときにバーナを停止させ
る第3の制御手段とを備えた構成である。Further, in this invention, a heat exchanger heated by a burner, a radiator, a hot water circulation path formed by sequentially connecting a hot water tank in an annular shape with pipes, and hot water in the hot water tank are heated in the hot water circulation path. A hot water heating device that has a circulation pump that circulates in the order of exchanger → radiator → hot water tank → heat exchanger, and operates the burner and circulation pump by the operation signal on the radiator side to detect the outside air temperature Temperature sensor, a water temperature sensor installed to detect the temperature of the hot water flowing in the pipe connecting the heat exchanger and radiator in the hot water circulation path, and when there is no operating signal and the outside temperature First control means for operating the circulation pump when the temperature detected by the sensor is below a certain temperature near the freezing point, and when there is no operation signal, and when the temperature detected by the water temperature sensor is below a certain temperature near the freezing point. Ba A second control means for operating the burner, and a third control means for stopping the burner when there is an operation signal and when the temperature detected by the water temperature sensor is higher than a certain temperature near the boiling point. is there.
(ホ)作用 運転停止中に外気温が凍結危険温度に近づくと、循環
ポンプが運転し、放熱器側の比較的温かい循環水と熱源
機側の循環水とが撹拌される。このため、熱源機側の循
環水の温度低下が抑制され、循環水の凍結が防止され
る。このような凍結防止運転に拘らず、さらに外気温が
低下し、循環水が凍結危険温度に近づくと、バーナが運
転を行い、、循環水の凍結を防止する。(E) Action When the outside air temperature approaches the freezing dangerous temperature during the operation stop, the circulation pump operates and the comparatively warm circulating water on the radiator side and the circulating water on the heat source side are agitated. Therefore, the temperature drop of the circulating water on the heat source side is suppressed, and the freezing of the circulating water is prevented. Regardless of such freezing prevention operation, when the outside air temperature further decreases and the circulating water approaches the freezing dangerous temperature, the burner operates to prevent the circulating water from freezing.
また、請求項2の温水暖房装置においては、水温セン
サが運転停止中における循環水の凍結防止のためのセン
サと、暖房運転中における循環水の沸騰防止のためのセ
ンサとに兼用され、循環水の凍結や沸騰による温水循環
路の破損が防止される。Further, in the hot water heating apparatus according to claim 2, the water temperature sensor is used both as a sensor for preventing freezing of the circulating water during the operation stop and a sensor for preventing boiling of the circulating water during the heating operation. Damage to the hot water circuit due to freezing or boiling of the water is prevented.
(ヘ)実施例 以下、この発明を図面に示す実施例について説明す
る。(F) Embodiment Hereinafter, an embodiment of the present invention shown in the drawings will be described.
第1図において、(1)は屋外に設置される熱源機で
あり、熱源機(1)には入口側ヘッダー(2)と出口側
ヘッダー(3)との間に温水タンク(4)、循環ポンプ
(5)及び熱交換器(6)が順次接続された温水回路
(7)と、温水タンク(4)の上部に取付けられたラジ
エータキャップ(8)の圧力調整弁(9)を介して温水
タンク(4)に接続された補給水タンク(10)と、熱交
換器(6)を加熱するガスバーナ(11)と、このガスバ
ーナ(11)にガス燃料を供給する比例弁(PV)及び電磁
弁(燃料供給手段)(12)と、ガスバーナ(11)の近く
に設けられた点火装置(13)及びフレームロッド(炎検
知素子)(14)と、循環ポンプ(5)と熱交換器(6)
との間の温水回路(7)に接続された注水口(15)と、
熱交換器(6)の出口側の温水回路(7)に取付けられ
た水温センサ(16)と、外気温センサ(TO)と、熱源側
制御装置(17)とが設けられている。In FIG. 1, (1) is a heat source device installed outdoors, and the heat source device (1) includes a hot water tank (4) and a circulation port between the inlet side header (2) and the outlet side header (3). Hot water is passed through a hot water circuit (7) to which a pump (5) and a heat exchanger (6) are sequentially connected, and a pressure control valve (9) of a radiator cap (8) attached to the upper part of the hot water tank (4). Make-up water tank (10) connected to tank (4), gas burner (11) for heating heat exchanger (6), proportional valve (PV) and solenoid valve for supplying gas fuel to this gas burner (11) (Fuel supply means) (12), ignition device (13) provided near the gas burner (11), frame rod (flame detection element) (14), circulation pump (5) and heat exchanger (6)
A water inlet (15) connected to the hot water circuit (7) between
A water temperature sensor (16) attached to the hot water circuit (7) on the outlet side of the heat exchanger (6), an outside air temperature sensor (TO), and a heat source side control device (17) are provided.
(18A)(18B)は暖房を必要とする室内に設置される
室内機であり、室内機(18A)(18B)には放熱器(19
A)(19B)と、放熱器(19A)(19B)に室内空気を循環
させる送風ファン(20A)(20B)と、室温センサ(21
A)(21B)と、室内側制御装置(22A)(22B)とが内蔵
され、放熱器(19A)(19B)の温水入口(23A)(23B)
と温水出口(24A)(24B)とはそれぞれ開閉弁(25)
(26)を有する配管(27A)(27B)(28A)(28B)を介
して熱源機(1)の出口側ヘッダー(3)と入口側ヘッ
ダー(2)とに接続されている。また、室内側制御装置
(22A)(22B)は運転スイッチ(図示せず)が投入さ
れ、かつ、室温が設定温度より低く、サーモスイッチ
(図示せず)がオンになっているときに、送風ファン
(20A)(20B)を運転させるとともに、熱源側制御装置
(17)に運転信号を供給するものである。(18A) and (18B) are indoor units installed in a room that requires heating. The indoor units (18A) and (18B) have radiators (19
A) (19B), fan (20A) (20B) that circulates indoor air through radiators (19A) (19B), and room temperature sensor (21
A) (21B) and indoor control device (22A) (22B) are built-in, and hot water inlet (23A) (23B) of radiator (19A) (19B)
The hot water outlet (24A) (24B) and the open / close valve (25)
It is connected to the outlet-side header (3) and the inlet-side header (2) of the heat source unit (1) via pipes (27A) (27B) (28A) (28B) having (26). In addition, the indoor control devices (22A) and (22B) blow air when the operation switch (not shown) is turned on, the room temperature is lower than the set temperature, and the thermo switch (not shown) is turned on. The fan (20A) (20B) is operated, and an operation signal is supplied to the heat source side control device (17).
熱源側制御装置(17)は第2図に示すように、予め記
憶されたプログラムに基いて循環ポンプ(5)、開閉弁
(25)(26)及びガスバーナ(11)を制御するマイクロ
コンピュータ(29)(以下マイコンという)を有してい
る。このマイコン(29)の入力側(I1〜I6)には室内側
制御装置(22A)(22B)が運転信号を発しているときに
それぞれオンとなるリレースイッチ等の入力スイッチ
(30A)(30B)と、外気温センサ(TO)と、水温センサ
(16)と、フレームロッド(14)とが設けられている。
そして、外気温センサ(16)の検出温度は比較器(31)
で比較される。この比較器(31)は外気温が2℃以下に
なると“H"信号を発し、外気温が3℃以下になると“L"
信号を発し、これらの信号をマイコン(29)の入力ポー
ト(I4)に供給する。また、水温センサ(16)の検出温
度は2つの比較器(32)(33)で比較される。比較器
(32)は水温が60℃以下になると“H"信号を発し、水温
が80℃以下になると“L"信号を発するものであり、比較
器(33)は水温が2℃以下になると“H"信号を発し、水
温が20℃以上になると“L"信号を発するものであり、そ
れぞれの信号はマイコン(29)の入力ポート(I4)(I
5)に供給されている。また、フレームロッド(14)の
電流Iは炎検出装置(34)で比較される。この炎検出装
置(34)はフレーム電流Iが第1の設定値IH以上になる
と“H"信号を発し、フレーム電流IがIHよりも小さいIL
以下になると“L"信号を発し、これらの信号をマイコン
(29)の入力ポート(I6)に供給する。As shown in FIG. 2, the heat source side control device (17) controls a circulation pump (5), opening / closing valves (25) (26) and a gas burner (11) based on a pre-stored program (29). ) (Hereinafter referred to as a microcomputer). Input switches (30A) (30B), such as relay switches, that are turned on when the indoor control devices (22A) (22B) output operating signals to the input side (I1 to I6) of this microcomputer (29). An outside air temperature sensor (TO), a water temperature sensor (16), and a frame rod (14) are provided.
Then, the temperature detected by the outside air temperature sensor (16) is determined by the comparator (31).
Are compared. This comparator (31) issues an "H" signal when the outside temperature falls below 2 ° C, and an "L" when the outside temperature falls below 3 ° C.
It emits signals and supplies these signals to the input port (I4) of the microcomputer (29). Further, the temperatures detected by the water temperature sensor (16) are compared by the two comparators (32) (33). The comparator (32) emits an "H" signal when the water temperature is 60 ° C or lower, and an "L" signal when the water temperature is 80 ° C or lower, and the comparator (33) when the water temperature is 2 ° C or lower. It emits an "H" signal and an "L" signal when the water temperature rises above 20 ° C. Each signal is an input port (I4) (I4) (I4) (I4) of the microcomputer (29).
5) is being supplied. The current I of the frame rod (14) is compared by the flame detection device (34). The flame detection device (34) when the flame current I becomes equal to or higher than the first set value I H "H" emits a signal, frame current I is less than I H I L
When it becomes the following, "L" signal is emitted and these signals are supplied to the input port (I6) of the microcomputer (29).
一方、マイコン(29)の出力側(P1〜P6)にはトラン
ジスタ等の反転器よりなる5つのトライブ回路(35)〜
(39)と、これらのドライブ回路(35)〜(39)によっ
てそれぞれ通電が制御されるリレー(40)〜(44)とが
設けられている。また、比例弁(PV)にはマイコン(2
9)の出力ポート(P6)から弁開度信号が供給されてい
る。また、(VD)及び(VC)は直流電源である。On the other hand, on the output side (P1 to P6) of the microcomputer (29), there are five tribe circuits (35) to
(39) and relays (40) to (44) whose energization is controlled by these drive circuits (35) to (39), respectively. The proportional valve (PV) has a microcomputer (2
The valve opening signal is supplied from the output port (P6) of 9). Further, (V D ) and (V C ) are DC power supplies.
第3図は循環ポンプ(5)、ガスバーナ(11)及び開
閉弁(25)(26)の駆動回路であり、循環ポンプ
(5)、点火装置(13)、電磁弁(12)及び開閉弁(2
5)(26)がそれぞれリレー(40)〜(44)のリレース
イッチ(401)(411)(421)(431)(441)を介して
交流電源(45)に接続されている。FIG. 3 shows a drive circuit for the circulation pump (5), the gas burner (11) and the on-off valves (25) (26). The circulation pump (5), the ignition device (13), the solenoid valve (12) and the on-off valve ( 2
5) and (26) are connected to the AC power supply (45) via relay switches (401) (411) (421) (431) (441) of the relays (40) to (44).
上述した温水暖房装置の動作を第4図〜第6図を参照
して説明する。今、室内機(18A)(18B)の室内側制御
装置(22A)(22B)がともに運転信号を発しているもの
とすると、入力スイッチ(30A)(30B)はともにオンに
なり、直流電源(VD)の電圧がマイコン(29)の入力ポ
ート(I1)(I2)に“H"信号として供給されている。マ
イコン(29)は出力ポート(P1)(P4)(P5)からドラ
イブ回路(35)(38)(39)に“H"信号を発してこれら
の出力を“L"にし、リレー(40)(43)(44)に通電さ
せる。このため、リレースイッチ(401)(431)(44
1)が閉じ、第4図に示すように循環ポンプ(5)が運
転を行うとともに、開閉弁(25)(26)が開になる。熱
交換器(6)の出口側の水温が低く(60℃以下)、比較
器(32)から入口ポート(I4)へ“H"信号が供給されて
いる場合、マイコン(29)は出力ポート(P2)(P3)か
らドライブ回路(36)(37)へ所定時間“H"信号を送
り、リレー(41)(42)に通電させることによって点火
装置(13)を作動させるとともに、電磁弁(12)を開に
する(点火トライアル)。このため、ガスバーナ(11)
にガスと空気の混合気体が供給され、点火装置(13)に
よって着火が試みられる。この結果、混合気体に着火さ
れ、フレームロッド(14)を流れる電流IがIH以上にな
り、炎検出装置(34)がマイコン(29)の入力ポート
(I6)に“H"信号を供給すると、マイコン(29)は所定
時間が経過した後も出力ポート(P3)から“H"信号を発
し、ガスバーナ(11)への燃料供給を継続させる。The operation of the above-described hot water heater will be described with reference to FIGS. 4 to 6. Now, assuming that the indoor control devices (22A) and (22B) of the indoor units (18A) and (18B) are both issuing operation signals, both input switches (30A) and (30B) are turned on, and the DC power supply ( The voltage of V D ) is supplied to the input port (I1) (I2) of the microcomputer (29) as "H" signal. The microcomputer (29) outputs "H" signals from the output ports (P1) (P4) (P5) to the drive circuits (35) (38) (39) to set these outputs to "L", and the relay (40) ( Energize 43) and (44). Therefore, the relay switch (401) (431) (44
1) is closed, the circulation pump (5) is operated as shown in FIG. 4, and the on-off valves (25) (26) are opened. When the water temperature at the outlet side of the heat exchanger (6) is low (60 ° C or less) and the "H" signal is supplied from the comparator (32) to the inlet port (I4), the microcomputer (29) outputs P2) (P3) sends a "H" signal to the drive circuits (36) (37) for a predetermined time to energize the relays (41) (42) to activate the ignition device (13) and the solenoid valve (12). ) Open (ignition trial). Because of this, the gas burner (11)
A mixed gas of gas and air is supplied to, and ignition is attempted by the ignition device (13). As a result, when the mixed gas is ignited, the current I flowing through the frame rod (14) becomes I H or more, and the flame detection device (34) supplies an “H” signal to the input port (I6) of the microcomputer (29). , The microcomputer (29) issues an "H" signal from the output port (P3) even after a lapse of a predetermined time, and continues the fuel supply to the gas burner (11).
このようにして、循環ポンプ(5)が運転し、ガスバ
ーナ(11)で燃焼が行われると、熱交換器(6)で加熱
された温水は配管(27A)(27B)を通って室内機(18
A)(18B)の放熱器(19A)(19B)に送られ、ここで送
風ファン(20A)(20B)によって循環される室内空気を
加熱する。そして、熱交換を終えた放熱器(10A)(10
B)の温水は配管(28A)(28B)を通って熱源機(1)
の温水回路(7)に戻り、温水タンク(4)に貯溜され
た後、熱交換器(6)によって再加熱される。In this way, when the circulation pump (5) is operated and combustion is performed in the gas burner (11), the hot water heated by the heat exchanger (6) passes through the pipes (27A) (27B) and becomes the indoor unit ( 18
A) (18B) radiators (19A) (19B), where the indoor air circulated by the ventilation fans (20A) (20B) is heated. And the radiator (10A) (10
Hot water of B) passes through pipes (28A) (28B) and heat source machine (1)
Returning to the hot water circuit (7), the water is stored in the hot water tank (4) and then reheated by the heat exchanger (6).
このような暖房運転中に室内側制御装置(22A)(22
B)の何れか一方の運転信号がなくなると、その運転信
号に対応する開閉弁(25)又は開閉弁(26)が閉じ、室
内器(18A)又は室内機(18B)での暖房運転が停止す
る。また、マイコン(29)の出力ポート(P6)から比例
弁(PV)に弁開度信号が送られているため、ガスバーナ
(11)での燃焼量は室内負荷(例えば室内機の運転台
数)等に応じて適度に加減される。また、熱交換器
(6)の出口側の水温が80℃以上になると、比較器(3
2)の出力が“L"になり、マイコン(29)は出力ポート
(P3)の信号を“L"にしてガスバーナ(11)での燃焼を
休止させる。このため、温水循環路の温水が沸騰した
り、過度に加熱されるのを防止できる。During such heating operation, the indoor control device (22A) (22A
When the operation signal of either one of B) disappears, the on-off valve (25) or the on-off valve (26) corresponding to the operation signal is closed, and the heating operation in the indoor unit (18A) or the indoor unit (18B) is stopped. To do. In addition, since the valve opening signal is sent from the output port (P6) of the microcomputer (29) to the proportional valve (PV), the combustion amount in the gas burner (11) depends on the indoor load (for example, the number of operating indoor units), etc. It is moderately adjusted according to. When the water temperature on the outlet side of the heat exchanger (6) reaches 80 ℃ or higher, the comparator (3
The output of 2) becomes "L", and the microcomputer (29) sets the signal of the output port (P3) to "L" to stop combustion in the gas burner (11). Therefore, it is possible to prevent the hot water in the hot water circulation path from boiling and being excessively heated.
運転信号がなくなり、入力スイッチ(30A)(30B)が
ともに開になると、マイコン(29)は循環ポンプ(5)
及びガスバーナ(11)の運転を停止させ、開閉弁(25)
(26)を閉にする。また、このような暖房運転停止中に
おいて、マイコン(29)は第5図及び第6図に示すよう
に外気温センサ(TO)及び水温センサ(16)の検出温度
を監視する。すなわち、冬期において、外気温が低下し
て2℃以下になり、比較器(31)が“H"信号を発する
と、マイコン(29)の出力ポート(P1)(P4)(P5)の
信号を“H"にする。このとき、循環ポンプ(5)が運転
するとともに、開閉弁(25)(26)が開になり、温水循
環路の全ての水が循環する。このため、室内機(18A)
(18B)側の比較的温かい水が熱源機(1)側の温水回
路(7)や配管に供給され、循環水の凍結が防止され
る。このような凍結防止運転にも拘らず、さらに外気温
が低下して水温センサ(16)の検出温度が2℃以下にな
り、比較器(33)が“H"信号を発すると、マイコン(2
9)は出力ポート(P2)(P3)の信号を“H"にし、上述
した順序でガスバーナ(11)に燃焼を行わせる。この燃
焼は水温センサ(16)の検出温度が20℃以上になった時
点で終了するので、ごく短時間行われる。その後、外気
温が3℃以上になり、循環水の凍結危険がなくなると、
マイコン(29)は循環ポンプ(5)の運転を停止させ、
開閉弁(25)(26)を閉にする。When the operation signal disappears and the input switches (30A) and (30B) are both opened, the microcomputer (29) turns on the circulation pump (5).
The operation of the gas burner (11) is stopped, and the open / close valve (25)
Close (26). Further, during such a heating operation stop, the microcomputer (29) monitors the temperatures detected by the outside air temperature sensor (TO) and the water temperature sensor (16) as shown in FIGS. 5 and 6. That is, in winter, when the outside temperature drops below 2 ° C and the comparator (31) issues a "H" signal, the signals from the output ports (P1) (P4) (P5) of the microcomputer (29) are output. Set to “H”. At this time, the circulation pump (5) is operated and the on-off valves (25) and (26) are opened, so that all the water in the hot water circulation path circulates. Therefore, the indoor unit (18A)
The relatively warm water on the (18B) side is supplied to the hot water circuit (7) and the piping on the heat source device (1) side, and the circulating water is prevented from freezing. Despite this freezing prevention operation, when the outside temperature further decreases and the temperature detected by the water temperature sensor (16) drops below 2 ° C, and the comparator (33) issues an "H" signal, the microcomputer (2
9) sets the signals at the output ports (P2) and (P3) to "H", and causes the gas burner (11) to burn in the order described above. Since this combustion ends when the temperature detected by the water temperature sensor (16) reaches 20 ° C. or higher, it is performed for a very short time. After that, when the outside temperature rises above 3 ℃ and the danger of freezing of circulating water disappears,
The microcomputer (29) stops the operation of the circulation pump (5),
Close the on-off valves (25) (26).
尚、上述した凍結危険時における循環ポンプ(5)の
みの運転は間欠的に行われるようにしても良い。The operation of only the circulation pump (5) at the time of freezing danger may be intermittently performed.
(ト)発明の効果 この発明は以上のように構成されているので、暖房運
転の停止中に外気温が低下し、凍結危険が生じた場合、
循環ポンプの運転により比較的温かい室内側の循環水を
熱源側に供給して循環水の凍結を防止することができ、
経済的な凍結防止運転を行うことができる。しかも、こ
のような凍結防止運転にも拘らず、水温が低下した場合
にはバーナで燃焼を行わせ、循環水の凍結を確実に防止
することができ、循環水に不凍液をしない安価な装置に
適している。(G) Effect of the Invention Since the present invention is configured as described above, when the outside air temperature decreases while the heating operation is stopped and a freezing risk occurs,
By operating the circulation pump, it is possible to prevent the freezing of the circulating water by supplying the relatively warm indoor circulating water to the heat source side.
Economical antifreeze operation can be performed. Moreover, despite such anti-freezing operation, when the water temperature drops, combustion can be performed with a burner to reliably prevent freezing of the circulating water, making it an inexpensive device that does not contain antifreeze liquid in the circulating water. Is suitable.
また、請求項2の温水暖房装置においては、水温セン
サを循環水の凍結を防止する制御手段のセンサと、循環
水の沸騰や過熱を防止する制御手段のセンサとを兼用す
ることができ、循環水の凍結や沸騰による温水循環炉の
破損や、循環水の過熱による劣化を防止することができ
る。Further, in the hot water heating device according to the second aspect, the water temperature sensor can be used as both a sensor of the control means for preventing freezing of the circulating water and a sensor of the control means for preventing boiling or overheating of the circulating water. It is possible to prevent damage to the hot water circulation furnace due to freezing or boiling of water and deterioration due to overheating of circulating water.
第1図ないし第6図はこの発明の一実施例に関するもの
であり、第1図は温水暖房装置の配管系統図、第2図は
熱源側制御装置の制御系統説明図、第3図は循環ポン
プ、ガスバーナ及び開閉弁を駆動する回路の電気回路
図、第4図は暖房運転中における動作説明用のフローチ
ャート、第5図は暖房運転停止中における動作説明用の
フローチャート、第6図は凍結危険時における制御特性
説明図である。 (5)……循環ポンプ、(6)……熱交換器、(11)…
…バーナ、(TO)……外気温センサ、(16)……水温セ
ンサ、(19A)(19B)……放熱器、(29)……第1の制
御手段、第2の制御手段及び第3の制御手段を兼ねるマ
イクロコンピュータ。1 to 6 relate to an embodiment of the present invention. FIG. 1 is a piping system diagram of a hot water heating system, FIG. 2 is a control system explanatory diagram of a heat source side control system, and FIG. 3 is a circulation system. An electric circuit diagram of a circuit for driving the pump, the gas burner and the on-off valve, FIG. 4 is a flowchart for explaining the operation during the heating operation, FIG. 5 is a flowchart for explaining the operation during the heating operation stop, and FIG. It is a control characteristic explanatory view at the time. (5) ... Circulation pump, (6) ... Heat exchanger, (11) ...
… Burner, (TO) …… Outside temperature sensor, (16) …… Water temperature sensor, (19A) (19B) …… Radiator, (29) …… First control means, second control means and third Microcomputer that doubles as a control means.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 尾串 恒雄 大阪府守口市京阪本通2丁目18番地 三 洋電機株式会社内 (72)発明者 内藤 哲男 大阪府守口市京阪本通2丁目18番地 三 洋電機株式会社内 (56)参考文献 実開 昭53−4762(JP,U) 実開 昭57−125911(JP,U) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsuneo Ogushi 2-18 Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Inventor Tetsuo Naito 2-18 Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Denki Co., Ltd. (56) References Actually open Sho 53-4762 (JP, U) Actually open 57-125911 (JP, U)
Claims (2)
温水タンクを順に配管で環状に接続して形成した温水循
環路と、温水タンク内の温水をこの温水循環路中で熱交
換器→放熱器→温水タンク→前記熱交換器の順に循環さ
せる循環ポンプとを有し、放熱器側の運転信号によって
バーナと循環ポンプを運転させるようにした温水暖房装
置において、外気温を検出する外気温センサと、温水循
環路中で熱交換器と放熱器とをつなぐ配管内を流れる温
水の水温を検出できるように取り付けられた水温センサ
と、運転信号がないときで、かつ、外気温センサの検出
温度が氷点近くのある温度以下のときに循環ポンプを運
転させる第1の制御手段と、運転信号がないときで、か
つ、水温センサの検出温度が氷点近くのある温度以下の
ときにバーナを運転させる第2の制御手段とを備えたこ
とを特徴とする温水暖房装置。1. A heat exchanger heated by a burner, a radiator,
A hot water circulation path formed by sequentially connecting hot water tanks in an annular shape with pipes, and a circulation pump that circulates the hot water in the hot water tank in the order of heat exchanger → radiator → hot water tank → heat exchanger. In the hot water heating device having a burner and a circulation pump operated by a radiator side operation signal, an outside air temperature sensor for detecting an outside air temperature, a heat exchanger and a radiator in the hot water circulation path. A water temperature sensor installed to detect the water temperature of the hot water flowing in the connecting pipe, and the circulation pump is operated when there is no operation signal and the temperature detected by the outside air temperature sensor is below a certain temperature near the freezing point. A temperature control system comprising: a first control means; and a second control means for operating the burner when there is no operation signal and when the temperature detected by the water temperature sensor is below a certain temperature near the freezing point. Heating.
温水タンクを順に配管で環状に接続して形成した温水循
環路と、温水タンク内の温水をこの温水循環路中で熱交
換器→放熱器→温水タンク→前記熱交換器の順に循環さ
せる循環ポンプとを有し、放熱器側の運転信号によって
バーナと循環ポンプを運転させるようにした温水暖房装
置において、外気温を検出する外気温センサと、温水循
環路中で熱交換器と放熱器とをつなぐ配管内を流れる温
水の水温を検出できるように取り付けられた水温センサ
と、運転信号がないときで、かつ、外気温センサの検出
温度が氷点近くのある温度以下のときに循環ポンプを運
転させる第1の制御手段と、運転信号がないときで、か
つ、水温センサの検出温度が氷点近くのある温度以下の
ときにバーナを運転させる第2の制御手段と、運転信号
があるときで、かつ、水温センサの検出温度が設定温度
以上のときにバーナを停止させる第3の制御手段とを備
えたことを特徴とする温水暖房装置。2. A heat exchanger heated by a burner, a radiator,
A hot water circulation path formed by sequentially connecting hot water tanks in an annular shape with pipes, and a circulation pump that circulates the hot water in the hot water tank in the order of heat exchanger → radiator → hot water tank → heat exchanger. In the hot water heating device having a burner and a circulation pump operated by a radiator side operation signal, an outside air temperature sensor for detecting an outside air temperature, a heat exchanger and a radiator in the hot water circulation path. A water temperature sensor installed to detect the water temperature of the hot water flowing in the connecting pipe, and the circulation pump is operated when there is no operation signal and the temperature detected by the outside air temperature sensor is below a certain temperature near the freezing point. The first control means, the second control means for operating the burner when there is no operation signal, and the temperature detected by the water temperature sensor is below a certain temperature near the freezing point; , Hot-water heating device being characterized in that a third control means for stopping the burner when the detected temperature of the water temperature sensor is equal to or higher than the set temperature.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1294708A JP2562697B2 (en) | 1989-11-13 | 1989-11-13 | Hot water heating system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1294708A JP2562697B2 (en) | 1989-11-13 | 1989-11-13 | Hot water heating system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03156216A JPH03156216A (en) | 1991-07-04 |
JP2562697B2 true JP2562697B2 (en) | 1996-12-11 |
Family
ID=17811278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1294708A Expired - Fee Related JP2562697B2 (en) | 1989-11-13 | 1989-11-13 | Hot water heating system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2562697B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5606140B2 (en) * | 2010-05-09 | 2014-10-15 | パーパス株式会社 | Heat source device, heating device, freeze prevention control method thereof, and freeze prevention control program |
JP7475297B2 (en) * | 2021-03-03 | 2024-04-26 | リンナイ株式会社 | Fluid circulation heating system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS534762U (en) * | 1976-06-30 | 1978-01-17 | ||
JPS5749059Y2 (en) * | 1978-09-22 | 1982-10-27 |
-
1989
- 1989-11-13 JP JP1294708A patent/JP2562697B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH03156216A (en) | 1991-07-04 |
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