JPS63243635A - Hot water space heater - Google Patents
Hot water space heaterInfo
- Publication number
- JPS63243635A JPS63243635A JP7454087A JP7454087A JPS63243635A JP S63243635 A JPS63243635 A JP S63243635A JP 7454087 A JP7454087 A JP 7454087A JP 7454087 A JP7454087 A JP 7454087A JP S63243635 A JPS63243635 A JP S63243635A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- heat exchanger
- heating
- outside air
- air temperature
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 239000002351 wastewater Substances 0.000 claims description 12
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（発明の目的〕
（産業上の利用分野）
本発明は熱交換媒体として渇水を使用する温水式暖房装
置に係り、特に温水供給系統を改良した温水式暖房装置
に関する。DETAILED DESCRIPTION OF THE INVENTION (Object of the Invention) (Industrial Field of Application) The present invention relates to a hot water heating system that uses dry water as a heat exchange medium, and more particularly to a hot water heating system that has an improved hot water supply system.
（従来の技術）
従来の一般的な温水式暖房ｖ４置の系統構成を第５図に
示す。(Prior Art) Fig. 5 shows the system configuration of a conventional general hot water type heating system v4.
ポンプ１を有する閑ループ状の温水配管２に温水加熱用
の一次熱交換器として主熱交換器３およびバックアップ
熱交換器４が順次に設けられ、また温水配管２の所定部
位に室内暖房用の複数の二次熱交換器５がそれぞれ温水
流ｍ調節弁６を介して並列に接続されている。A main heat exchanger 3 and a backup heat exchanger 4 are sequentially installed as a primary heat exchanger for heating hot water in an idle loop hot water pipe 2 having a pump 1; A plurality of secondary heat exchangers 5 are connected in parallel via hot water flow m regulating valves 6, respectively.
主熱交換器３およびバックアップ熱交換器４は管種熱交
換器とされており、主熱交換器３は図示しない熱設備か
ら温排水配管７を介して供給される温排水によって暖房
用温水を常時加熱し、またバックアップ熱交換器４は図
示しないボイラ等から蒸気配管８を介して供給される蒸
気によって熱設備停止時等に起動する。The main heat exchanger 3 and the backup heat exchanger 4 are pipe-type heat exchangers, and the main heat exchanger 3 supplies hot water for heating with heated waste water supplied from a heat facility (not shown) via a hot water drain pipe 7. The backup heat exchanger 4 is constantly heated, and is activated when the heat equipment is stopped by steam supplied from a boiler (not shown) or the like via a steam pipe 8.
ところで、従来の温水式暖房装置では、一次熱交換器か
ら二次熱交換器に供給する温水温度を温度制御手段によ
って一定の値に制御するようになっている。即ち、温水
配管２に設け１Ｃ温水温度検知器９によって温水温度を
検知し、この出力信号を信号ケーブル１０により、温水
配管２に設けた主熱交換器バイパス配管１１のバイパス
流ｒｌｉ調節弁１２またはバックアップ熱交換器４への
然気配管８の蒸気流１７調節弁１３にフィードバックし
、温水流量や蒸気流量を調節して温水温度を一定値に制
御している。By the way, in conventional hot water type heating devices, the temperature of hot water supplied from the primary heat exchanger to the secondary heat exchanger is controlled to a constant value by a temperature control means. That is, the hot water temperature is detected by the 1C hot water temperature detector 9 provided in the hot water piping 2, and the output signal is sent to the bypass flow rli control valve 12 or the main heat exchanger bypass piping 11 provided in the hot water piping 2 via the signal cable 10. The steam flow 17 in the natural air piping 8 to the backup heat exchanger 4 is fed back to the control valve 13, and the hot water flow rate and steam flow rate are adjusted to control the hot water temperature to a constant value.
（発明が解決しようとづ°る問題点）
従来の温水式暖房装置では温水供給温度の一定制御を行
なっており、例えば第６図に示すように、外気温度が変
動しても温水供給温度は変らない。したがって、外気温
度に応じた暖房効果を１ｑるためには、第５図に示すよ
うに各二次熱交換器５への温水供給量をその上流側の濡
水流Ｅ調節弁６によって調節するようにしている。この
ため、温水配管２に多数の濡水温間調節弁６を設けるこ
とが必要となり、それだけ設置スペースが広くなり、ま
た保守等にも手間が掛かる等の問題があった。(Problems to be Solved by the Invention) In conventional hot water heating systems, the hot water supply temperature is controlled at a constant level. It doesn't change. Therefore, in order to increase the heating effect according to the outside air temperature by 1q, the amount of hot water supplied to each secondary heat exchanger 5 should be adjusted by the wet water flow E control valve 6 on the upstream side, as shown in FIG. I have to. Therefore, it is necessary to provide a large number of wet water temperature control valves 6 in the hot water pipe 2, which increases the installation space and causes problems such as maintenance and the like.
本発明はこのような事情に鑑みてなされたちので、外気
温度に応じて温水供給温度を制御することができ、二次
熱交換器毎の温水流ｍ調節弁設置の必要をなくし、スペ
ース効率や保守性等の向上が図れる温水式暖ｍ装置を提
供することを目的とする。The present invention has been developed in view of these circumstances, and it is possible to control the hot water supply temperature according to the outside air temperature, eliminating the need to install a hot water flow control valve for each secondary heat exchanger, and improving space efficiency. The purpose of the present invention is to provide a hot water type heating device that can improve maintainability, etc.
（問題点を解決するための手段）
本発明は、渇水を循環させる温水配管と、この温水配管
に設けた温水加熱用の一次熱交換器と、前記温水配管に
接続した室内暖房用の二次熱交換器とを有する温水式暖
房装置において、前記二次熱交換器への温水供給温度を
制御する手段として、一次熱交換器での熱交換量を外気
温度に対して反比例的に制御する熱交換量制御装置を設
けたことを特徴とする。(Means for Solving the Problems) The present invention provides hot water piping for circulating drought water, a primary heat exchanger for heating hot water provided in the hot water piping, and a secondary heat exchanger for room heating connected to the hot water piping. In a hot water heating system having a heat exchanger, the heat exchanger is configured to control the amount of heat exchanged in the primary heat exchanger in inverse proportion to the outside air temperature as means for controlling the temperature of hot water supplied to the secondary heat exchanger. It is characterized by being equipped with an exchange amount control device.
（作用）
暖房用の二次熱交換器に供給される温水の温度が、加熱
用の一次熱交換器部位で、例えば外気温が低い場合は高
く、また外気温が高い場合は低く制御される。(Function) The temperature of hot water supplied to the secondary heat exchanger for heating is controlled at the primary heat exchanger for heating to be high when the outside temperature is low, and low when the outside temperature is high. .
したがって、二次熱交換器に対応する多数の温水流ｍ調
節弁を設ける必要がなく、設置スペースの縮小、保守の
容易化等が図れる。Therefore, there is no need to provide a large number of hot water flow control valves corresponding to the secondary heat exchanger, and the installation space can be reduced and maintenance can be facilitated.
（実施例）
以下、本発明の一実施例を第１図および第２図を参照し
て説明する。(Example) An example of the present invention will be described below with reference to FIGS. 1 and 2.
第１図に示すように、ポンプ２１を有する閉ループ状の
温水配管２２に渇水加熱用の一次熱交換器として主熱交
換器２３およびバックアップ熱交換器２４を順次に設け
、また温水配管２２の所定部位に室内暖房用の複数の二
次熱交換器２５を並列に接続している。As shown in FIG. 1, a main heat exchanger 23 and a backup heat exchanger 24 are sequentially provided as primary heat exchangers for drought heating in a closed-loop hot water pipe 22 having a pump 21, and A plurality of secondary heat exchangers 25 for indoor heating are connected in parallel to the site.
主熱交換器２３およびバックアップ熱交換器２４は管型
熱交換器とし、主熱交換器２３は図示しない熱設備から
温排水配管２６を介して供給される温排水によって暖房
用温水を常時加熱し、またバックアップ熱交換器２４は
図示しないボイラ等から蒸気配管２７を介して供給され
る熱気によって熱設備停止時等に起動する。The main heat exchanger 23 and the backup heat exchanger 24 are tube-type heat exchangers, and the main heat exchanger 23 constantly heats hot water for heating with warm waste water supplied from a heat facility (not shown) via a hot water drain pipe 26. In addition, the backup heat exchanger 24 is activated by hot air supplied from a boiler (not shown) or the like via a steam pipe 27 when the heat equipment is stopped.
このものにおいて、二次熱交換器２５への温水供給温度
を制御する手段として、主熱交換器２３およびバックア
ップ熱交換器２４での熱交換量を外気温度に対して反比
例的に制御する熱交換量制御装置２８．２９をそれぞれ
設けている。In this device, as a means for controlling the hot water supply temperature to the secondary heat exchanger 25, a heat exchanger that controls the amount of heat exchanged in the main heat exchanger 23 and the backup heat exchanger 24 in inverse proportion to the outside air temperature is used. A quantity control device 28,29 is provided in each case.
主熱交換器２３の熱交換量制御装置２８は、外気温度を
検知する外気温度検知器３０と、温水配管２２に設けら
れ一次熱交換器２３をバイパスするバイパス配管３１と
、このバイパス配管３１に設けられ、外気温度検知器３
０およびその検知温度に応じて弁開度を設定する制御器
３０ａから信号ケーブル３２を介して出力される信号に
基づいてバイパス配管２２内の温水流量を制御するバイ
パス流量調節弁３３とによって構成している。The heat exchange amount control device 28 of the main heat exchanger 23 includes an outside air temperature detector 30 that detects the outside air temperature, a bypass piping 31 that is provided in the hot water piping 22 and bypasses the primary heat exchanger 23, and a bypass piping 31 that is provided in the hot water piping 22 and bypasses the primary heat exchanger 23. Provided with an outside temperature sensor 3
0 and a bypass flow rate control valve 33 that controls the hot water flow rate in the bypass piping 22 based on a signal outputted via a signal cable 32 from a controller 30a that sets the valve opening degree according to the detected temperature. ing.
また、バックアップ熱交換Ｓ２４の熱交換量制御装置２
９は、前記の外気温度検知器３０および制御器３０ａと
、−次加熱媒体としての蒸気を供給する蒸気配管２７に
設けられ外気温度検知器３０および制御器３０ａから信
号ケーブル３２を介して出力される信号に基づいて蒸気
流量を制御する一次流旧制御弁としての蒸気流ｆｆｉ
ｉ＋制御弁３４とによって構成している。In addition, the heat exchange amount control device 2 of the backup heat exchange S24
Reference numeral 9 is provided in the outside air temperature sensor 30 and the controller 30a, and the steam pipe 27 that supplies steam as a secondary heating medium, and is outputted from the outside air temperature sensor 30 and the controller 30a via the signal cable 32. Steam flow ffi as a primary flow former control valve that controls the steam flow rate based on the signal
i+control valve 34.
このような構成によれば、温排水を用いる通常暖房運転
時に二次熱交換器２５に供給される渇水の温度は、主熱
交換器２３で熱交換される温水温度とこの主熱交換器２
３をバイパスするバイパス流としての温水温度とバイパ
ス弁３３の開度に基づく両温水流間の比率によって定ま
る。この場合、外気温度検知器３０からの出力信号によ
り、外気温度に比例してバイパス流量調節弁３３の開度
が調節され、外気温度が高いときはバイパス流量が多く
なり、外気温度が低いときはバイパス流量が少なくなり
、熱交換される温水ｍの比率が調整される。即ち、主熱
交換器２３での熱交換量は外気温度に反比例して制御さ
れ、これにより温水供給温度は例えば第２図に示すよう
に、外気温度が高い場合には低く、外気温度が低い場合
には高く設定される。According to such a configuration, the temperature of drought water supplied to the secondary heat exchanger 25 during normal heating operation using heated waste water is equal to the temperature of the hot water heat exchanged in the main heat exchanger 23 and the main heat exchanger 2
It is determined by the temperature of the hot water as a bypass flow that bypasses the bypass valve 33 and the ratio between the two hot water flows based on the opening degree of the bypass valve 33. In this case, the opening degree of the bypass flow rate control valve 33 is adjusted in proportion to the outside air temperature based on the output signal from the outside air temperature sensor 30, so that when the outside air temperature is high, the bypass flow rate increases, and when the outside air temperature is low, the bypass flow rate increases. The bypass flow rate decreases, and the ratio of hot water m to be heat exchanged is adjusted. That is, the amount of heat exchanged in the main heat exchanger 23 is controlled in inverse proportion to the outside air temperature, and as a result, as shown in FIG. 2, the hot water supply temperature is low when the outside air temperature is high; In some cases, it is set high.
したがって、二次熱交換器２５への温水供給温度が外気
温度に応じて自動的に変化するので、二次熱交換器２５
側での流ｍ制御は不要となり、従来装置に設けられた複
数の温水流量調節弁等が省略でき、それだけ設置スペー
スの削減、保守点検箇所の減少等が図れる。Therefore, since the hot water supply temperature to the secondary heat exchanger 25 automatically changes according to the outside air temperature, the secondary heat exchanger 25
There is no need to control the flow rate on the side, and the plurality of hot water flow rate control valves and the like provided in the conventional device can be omitted, and the installation space and maintenance/inspection points can be reduced accordingly.
なお、温排水を利用できない場合には、主熱交換器２３
に代えてバックアップ熱交換器２４を起動させるが、こ
の場合には、使用する蒸気流Ｍが外気温度検知器３０か
らの出力信号に応じて作動する蒸気流ω調節弁３４によ
って制御され、これにより温水供給温度は第２図と同様
に、外気温度に応じて制御される。In addition, if hot water cannot be used, the main heat exchanger 23
Instead, the backup heat exchanger 24 is activated, but in this case, the steam flow M to be used is controlled by the steam flow ω control valve 34 that operates in response to the output signal from the outside temperature sensor 30. The hot water supply temperature is controlled according to the outside air temperature as in FIG. 2.
なお、前記実施例では、−火熱交換器として、温排水利
用の主熱交換器２３と蒸気利用のバックアップ熱交換器
２４との２つの熱交換器を有する構成にしたが、いずれ
か一方の型式の１つの熱交換器のみを有する構成として
もよい。また、その場合の熱交換Φ制御装置の構成は前
記実施例のものと逆にしてもよく、第３図および第４図
にその各例を示す。In the above embodiment, the -fire heat exchanger is configured to have two heat exchangers: the main heat exchanger 23 that uses heated waste water and the backup heat exchanger 24 that uses steam. The structure may include only one heat exchanger. Further, the configuration of the heat exchange Φ control device in that case may be reversed to that of the above embodiment, and examples thereof are shown in FIGS. 3 and 4.
即ら、第３図は温排水利用の一次熱交換器３５を設ける
とともに、その温排水配管３６に温排水流量調節弁３７
を設け、この温排水流量調節弁３７を用いて熱交換ω制
御器２！３８を構成したものである。That is, in FIG. 3, a primary heat exchanger 35 for using heated waste water is provided, and a heated waste water flow rate control valve 37 is installed in the heated waste water piping 36.
A heat exchange ω controller 2!38 is constructed using this heated wastewater flow rate control valve 37.
また、第４図は蒸気利用の一次熱交換器３９を設けると
ともに、そのバイパス配管４０にバイパス流量調節弁４
１を設け、このバイパス流量ｖＡ第弁４１を用いて熱交
換流量制御装置４２を構成したものである。４３は蒸気
配管を示す。Further, in FIG. 4, a primary heat exchanger 39 using steam is provided, and a bypass flow control valve 4 is provided in the bypass piping 40.
1 is provided, and a heat exchange flow rate control device 42 is constructed using this bypass flow rate vA-th valve 41. 43 indicates a steam pipe.
なお、第３図および第４図において、前記以外の構成は
第１図のものと同様であるから、対応する部分に同一符
号を付してその説明を省略する。Note that in FIGS. 3 and 4, the configurations other than those described above are the same as those in FIG. 1, so corresponding parts are given the same reference numerals and their explanations will be omitted.
これら第３図および第４図に示したものによっても前記
同様の作用効果が奏される。The same effects as those described above can also be achieved by the devices shown in FIGS. 3 and 4.
なお、以上の実施例により、熱交換流量制御装置付きの
一次熱交換器の構成を計４例示したが（２３，２４，３
５，３９）、これらは任意の数、配置で組合せ使用でき
ることは勿論である。In addition, in the above embodiments, a total of four configurations of the primary heat exchanger with a heat exchange flow rate control device were shown (23, 24, 3).
5, 39), these can of course be used in combination in any number and arrangement.
以上のように、本発明によれば、−火熱交換器の熱交換
量制御装置により、外気温度に応じて二次熱交換器への
温水供給温度自体を制御するようにしたので、二次熱交
換器毎に温水流量調節弁を設けなくとも適切な暖房効果
が得られるようになり、温水流量調節弁の省略によりス
ペース効率や保守性等の向上が図れるという作用効果が
奏される。As described above, according to the present invention, the temperature of hot water supplied to the secondary heat exchanger itself is controlled according to the outside air temperature by the heat exchange amount control device of the fire heat exchanger, so that the secondary heat exchanger An appropriate heating effect can be obtained without providing a hot water flow rate control valve for each exchanger, and the omission of the hot water flow rate control valve has the effect of improving space efficiency, maintainability, etc.
第１図は本発明の一実施例を示す系統図、第２図はその
特性を示すグラフ、第３図Ｊ３よびｍ４図はそれぞれ異
なる他の実施例を示す系統図、第５図は従来例を示す系
統図、第６図はその特性を示すグラフである。
２２・・・温水配管、２３．２４．３５．３９・・・−
次熱交換冴、２５・・・二次熱交換器、２８，２９゜３
８．４２・・・熱交換伍制６０装置、３０・・・外気温
度検出器。
第１図
第２図
第３図
第４図Fig. 1 is a system diagram showing one embodiment of the present invention, Fig. 2 is a graph showing its characteristics, Fig. 3 J3 and m4 are system diagrams showing other different embodiments, and Fig. 5 is a conventional example. Fig. 6 is a graph showing its characteristics. 22...Hot water piping, 23.24.35.39...-
Secondary heat exchanger, 25...Secondary heat exchanger, 28,29゜3
8.42...Heat exchange control device 60, 30...Outside air temperature detector. Figure 1 Figure 2 Figure 3 Figure 4
Claims (1)
た温水加熱用の一次熱交換器と、前記温水配管に接続し
た室内暖房用の二次熱交換器とを有する温水式暖房装置
において、前記二次熱交換器への温水供給温度を制御す
る手段として、一次熱交換器での熱交換量を外気温度に
対して反比例的に制御する熱交換量制御装置を設けたこ
とを特徴とする温水式暖房装置。 ２、熱交換量制御装置は、外気温度を検知する外気温度
検知器と、温水配管に設けられ一次熱交換器をバイパス
するバイパス配管と、このバイパス配管に設けられ前記
外気温度検知器からの出力信号に基づいてバイパス配管
内の温水流量を制御するバイパス流量調節弁とを有して
なる特許請求の範囲第１項記載の温水式暖房装置。 ３、一次熱交換器は、温排水または蒸気を加熱媒体とす
る管型熱交換器であり、熱交換量制御装置は、外気温度
を検知する外気温度検知器と、前記温排水または蒸気を
一次熱交換器に供給する加熱媒体供給配管に設けられ前
記外気温度検知器からの出力信号に基づいて温排水また
は蒸気の流量を制御する一次流量制御弁とを有してなる
特許請求の範囲第１項記載の温水式暖房装置。 ４、一次熱交換器は、温排水を加熱媒体とする主熱交換
器と、蒸気を加熱媒体とするバックアップ熱交換器とか
らなる特許請求の範囲第１項記載の温水式暖房装置。[Claims] 1. A hot water pipe that circulates hot water, a primary heat exchanger for heating the hot water provided in the hot water pipe, and a secondary heat exchanger for room heating connected to the hot water pipe. In the hot water heating system, a heat exchange amount control device is provided as a means for controlling the hot water supply temperature to the secondary heat exchanger, which controls the heat exchange amount in the primary heat exchanger in inverse proportion to the outside air temperature. A hot water heating system characterized by: 2. The heat exchange amount control device includes an outside air temperature detector that detects the outside air temperature, a bypass pipe that is installed in the hot water piping and bypasses the primary heat exchanger, and an output from the outside air temperature sensor that is installed in the bypass piping. The hot water heating device according to claim 1, further comprising a bypass flow rate control valve that controls the flow rate of hot water in the bypass piping based on a signal. 3. The primary heat exchanger is a tube-type heat exchanger that uses heated waste water or steam as a heating medium, and the heat exchange amount control device includes an outside air temperature detector that detects outside air temperature, and a primary heat exchanger that uses heated waste water or steam as a heating medium. Claim 1, comprising: a primary flow control valve that is installed in a heating medium supply pipe that supplies the heat exchanger and controls the flow rate of heated waste water or steam based on the output signal from the outside air temperature sensor. Hot water heating equipment as described in section. 4. The hot water heating device according to claim 1, wherein the primary heat exchanger comprises a main heat exchanger using heated waste water as a heating medium and a backup heat exchanger using steam as a heating medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62074540A JP2519714B2 (en) | 1987-03-30 | 1987-03-30 | Hot water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62074540A JP2519714B2 (en) | 1987-03-30 | 1987-03-30 | Hot water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63243635A true JPS63243635A (en) | 1988-10-11 |
| JP2519714B2 JP2519714B2 (en) | 1996-07-31 |
Family
ID=13550205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62074540A Expired - Lifetime JP2519714B2 (en) | 1987-03-30 | 1987-03-30 | Hot water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2519714B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002122342A (en) * | 2000-10-13 | 2002-04-26 | Osaka Gas Co Ltd | Chilled/hot water cooler/heater |
| JP2008116199A (en) * | 2007-10-26 | 2008-05-22 | Tokyo Electron Ltd | Heating medium circulation device and heat-treatment apparatus using the same |
| JP2015010779A (en) * | 2013-06-28 | 2015-01-19 | リンナイ株式会社 | Heating system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5442534A (en) * | 1977-08-15 | 1979-04-04 | Bendix Corp | Method of injecting fuel into internal combustion engine and fuel injector |
| JPS5442535A (en) * | 1977-09-09 | 1979-04-04 | Nissan Motor Co Ltd | Air fuel ratio changer for electronically controlled fuel injection engine |
| JPS5467354U (en) * | 1977-10-20 | 1979-05-12 |
-
1987
- 1987-03-30 JP JP62074540A patent/JP2519714B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5442534A (en) * | 1977-08-15 | 1979-04-04 | Bendix Corp | Method of injecting fuel into internal combustion engine and fuel injector |
| JPS5442535A (en) * | 1977-09-09 | 1979-04-04 | Nissan Motor Co Ltd | Air fuel ratio changer for electronically controlled fuel injection engine |
| JPS5467354U (en) * | 1977-10-20 | 1979-05-12 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002122342A (en) * | 2000-10-13 | 2002-04-26 | Osaka Gas Co Ltd | Chilled/hot water cooler/heater |
| JP4536899B2 (en) * | 2000-10-13 | 2010-09-01 | 大阪瓦斯株式会社 | Hot and cold water type air conditioner |
| JP2008116199A (en) * | 2007-10-26 | 2008-05-22 | Tokyo Electron Ltd | Heating medium circulation device and heat-treatment apparatus using the same |
| JP2015010779A (en) * | 2013-06-28 | 2015-01-19 | リンナイ株式会社 | Heating system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2519714B2 (en) | 1996-07-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |