JPH044511B2 - - Google Patents
Info
- Publication number
- JPH044511B2 JPH044511B2 JP61097746A JP9774686A JPH044511B2 JP H044511 B2 JPH044511 B2 JP H044511B2 JP 61097746 A JP61097746 A JP 61097746A JP 9774686 A JP9774686 A JP 9774686A JP H044511 B2 JPH044511 B2 JP H044511B2
- Authority
- JP
- Japan
- Prior art keywords
- engine
- temperature
- heat
- exchange fluid
- heat exchange
- 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 - Lifetime
Links
- 239000012530 fluid Substances 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 description 11
- 238000005338 heat storage Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 206010060904 Freezing phenomenon Diseases 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
Landscapes
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は温室等で代表される熱負荷における負
荷変動に応じてエンジンに対して回転数制御及び
発停制御を行う自動運転モードと定速連続回転さ
せる手動運転モードに切換え可能に構成したエン
ジン駆動型ヒートポンプに関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides an automatic operation mode and a constant speed control for controlling the engine speed and starting/stopping in response to load fluctuations in heat loads such as greenhouses. The present invention relates to an engine-driven heat pump that can be switched to a manual operation mode in which continuous rotation is performed.
この種のエンジン駆動型ヒートポンプにおいて
は、点検作業等の為に手動運転モードで運転する
場合には、熱負荷における負荷変動に応じてエン
ジンに対して行う回転数制御及び発停制御が作動
しないようにしてある。
When operating this type of engine-driven heat pump in manual operation mode for inspection work, etc., the engine speed control and start/stop control that are performed on the engine in response to load fluctuations in the heat load are prevented from operating. It is set as.
従つて、この手動運転モードの場合には定速連
続回転で運転が行われるので、気がつかないうち
に次のような危険な状態に陥いることがある。つ
まり、暖房運転時での高温熱交換流体経路におけ
る凝縮器出口部分で異常高温となり出口機器が焼
損する或いは冷房運転時での低温交換流体経路に
おける蒸発器出口部分で異常低温となり出口機器
が凍結を起すといつた問題がある。しかも、上記
のような問題があるので、作業者が上記異常に気
づいた場合にエンジンを緊急停止する手段がある
が、この場合にはエンジンを過熱した状態で急停
止させることになるので、エンジンが焼付等を起
すこともあつた。
Therefore, in this manual operation mode, the operation is performed at constant speed and continuous rotation, so that the following dangerous situation may occur without being noticed. In other words, during heating operation, the condenser outlet in the high-temperature heat exchange fluid path becomes abnormally high and the outlet equipment burns out, or during cooling operation, the low-temperature exchange fluid path becomes abnormally low at the evaporator outlet, causing the outlet equipment to freeze. I have a problem when I wake up. Moreover, because of the above-mentioned problems, there is a way to emergency stop the engine if the operator notices the above abnormality, but in this case, the engine will have to stop suddenly in an overheated state, so the engine could also cause burn-in.
本発明の目的は既に保有している制御形態を利
用して、手動運転モード時における機器損傷の防
止を図れるものを提供する点にある。 An object of the present invention is to provide a device that can prevent damage to equipment during manual operation mode by utilizing existing control forms.
本発明における特徴構成は凝縮器に対する高温
熱交換流体経路と蒸発器に対する低温熱交換流体
経路とに夫々温度センサを設け、手動運転モード
時において、暖房時に高温熱交換流体が設定温度
以上になつた場合に、及び、冷房時に低温熱交換
流体が設定温度上下になつた場合に、エンジンを
自動停止させる制御手段を有する点にあり、その
作用効果は次の通りである。
The characteristic configuration of the present invention is that temperature sensors are provided in the high-temperature heat exchange fluid path for the condenser and the low-temperature heat exchange fluid path for the evaporator, respectively, so that when the high-temperature heat exchange fluid reaches a set temperature or higher during heating in the manual operation mode, The present invention has a control means for automatically stopping the engine when the low-temperature heat exchange fluid becomes above or below the set temperature during cooling, and its effects are as follows.
つまり、暖房運転時に焼損を発生し易い高温熱
交換流体経路と、冷房運転時に凍結を発生し易い
低温熱交換流体経路とに夫々温度センサを設け、
両流体の温度を検出し乍ら、エンジン自動停止用
制御手段にその検出結果を出力して、手動運転モ
ードにおいても前記焼損・凍結に対応した設定温
度になれば自動停止させることができる。
In other words, temperature sensors are installed in the high-temperature heat exchange fluid path that is likely to burn out during heating operation, and the low-temperature heat exchange fluid path that is likely to freeze during cooling operation, respectively.
While detecting the temperatures of both fluids, the detection results are output to the engine automatic stop control means, so that even in manual operation mode, the engine can be automatically stopped when the set temperature corresponding to the burnout/freezing is reached.
その結果、手動運転モードにおいても自動的に
エンジン停止を行うこのができるので、トラブル
を回避し乍ら機器寿命の長期化を図ることができ
る。それに加えて、エンジン自動停止制御手段と
してはもともと自動運転モードで持つているもの
であるから、兼用利用化ができ、機器の増大化を
防止できるとともに、自動停止手段であればエン
ジン停止モードとして一定時間アイドリング運転
した後にエンジンを停止させるといつた穏やかな
停止制御が任意に選択できるので、少なくとも過
熱状態のままエンジンを停止させるといつたこと
は回避できる。
As a result, the engine can be automatically stopped even in the manual operation mode, so troubles can be avoided and the life of the equipment can be extended. In addition, since the engine automatic stop control means is originally provided in the automatic operation mode, it can be used for multiple purposes, preventing the increase in equipment, and the automatic engine stop control means can be used as a constant engine stop mode. Since a gentle stop control such as stopping the engine after idling for a period of time can be arbitrarily selected, at least it is possible to avoid stopping the engine while it is still in an overheated state.
ヒートポンプシステムについて暖房の場合を例
にとつて説明する。第１図に示すように、凝縮器
１、膨脹弁２、蒸発器３、エンジンＥ駆動型圧縮
機４からなる熱媒循環回路に対して、蒸発器３側
にこの蒸発器３と熱交換する井戸水等を熱源水と
する低温熱交換流体循環経路５、及び、凝縮器１
側にこの凝縮器１と熱交換する高温熱交換流体循
環経路６を設け、夫々の循環経路６，５に、第
１，第２循環ポンプＰ１，Ｐ２を備えている。前
記高温熱交換循環経路６は、蓄熱槽７を中立とし
て凝縮器１と蓄熱槽７を連結する第１循環経路６
Ａと、蓄熱槽７と温室等の熱負荷８を連結する第
循環経路６Ｂとからなり、第１循環経路６Ａにエ
ンジン冷却水を熱源とする第１熱交換器９を設け
ている。尚、第１熱交換器９で高温熱交換流体と
熱交換するエンジン冷却水はエンジン排ガスを熱
源とした第２熱交換器１０で熱交換した後第１熱
交換器９で熱交換を行いエンジンＥに帰還する循
環形態をとる。
The heat pump system will be explained using a case of heating as an example. As shown in FIG. 1, in a heat medium circulation circuit consisting of a condenser 1, an expansion valve 2, an evaporator 3, and an engine E-driven compressor 4, heat is exchanged with the evaporator 3 on the evaporator 3 side. A low-temperature heat exchange fluid circulation path 5 that uses well water or the like as a heat source water, and a condenser 1
A high-temperature heat exchange fluid circulation path 6 for exchanging heat with the condenser 1 is provided on the side, and each of the circulation paths 6 and 5 is provided with first and second circulation pumps P1 and P2. The high temperature heat exchange circulation path 6 is a first circulation path 6 that connects the condenser 1 and the heat storage tank 7 with the heat storage tank 7 as neutral.
A, and a first circulation path 6B that connects the heat storage tank 7 and a heat load 8 such as a greenhouse, and the first circulation path 6A is provided with a first heat exchanger 9 that uses engine cooling water as a heat source. Note that the engine cooling water that exchanges heat with the high-temperature heat exchange fluid in the first heat exchanger 9 is heat exchanged in the second heat exchanger 10 using engine exhaust gas as a heat source, and then heat exchanged in the first heat exchanger 9 to cool the engine. It takes a circular form returning to E.
前記エンジンＥの出力軸に対しては、この出力
軸に嵌着されたギヤとこのギヤの回転速度を検出
する電磁パルス式回転センサ１１を設け、この回
転センサ１１の検出結果をエンジン駆動用制御手
段１２に出力するようにしてある。前記制御手段
１２は電子カバナ等で代表されるエンジン駆動制
御装置１３に連係され、蓄熱槽７に設けられた温
度センサ１４の検出結果を基にエンジンＥの回転
数制御及び発停制御を行う。 The output shaft of the engine E is provided with a gear fitted to the output shaft and an electromagnetic pulse type rotation sensor 11 that detects the rotational speed of the gear, and the detection results of the rotation sensor 11 are used to control the engine drive. It is configured to output to means 12. The control means 12 is linked to an engine drive control device 13 typified by an electronic cabana or the like, and controls the rotational speed and start/stop of the engine E based on the detection result of a temperature sensor 14 provided in the heat storage tank 7.
前記第１循環経路６Ａの凝縮器１出口側に温度
センサS2を設け、この温度センサS2の検出結果を
前記制御手段１２に入力して、前記温度センサS2
が設定温度（暖房時運転停止温度＝tSH2に達した
場合には後記する手動運転モード時であつてもエ
ンジンＥを自動停止すべく構成してある。尚、蒸
発器３側低温熱交換流体循環経路５を蓄熱槽７に
連結する冷房時には、蒸発器３出口側に温度セン
サS1を設け、この温度センサS1が設定温度（冷房
時運転停止温度＝tSL2）に達した場合に、エンジ
ンＥを自動停止すべく構成する。したがつて、暖
房時には、凝縮器１出口部での異常高温による焼
損、及び、冷房時には、蒸発器１出口部での凍結
現象を防止できる。 A temperature sensor S 2 is provided on the condenser 1 outlet side of the first circulation path 6A, and the detection result of this temperature sensor S 2 is input to the control means 12 to control the temperature sensor S 2 .
When the temperature reaches the set temperature (heating operation stop temperature = t SH2 , the engine E is configured to be automatically stopped even in the manual operation mode described later. Note that the low-temperature heat exchange fluid on the evaporator 3 side During cooling, when the circulation path 5 is connected to the heat storage tank 7, a temperature sensor S1 is provided on the outlet side of the evaporator 3, and when this temperature sensor S1 reaches the set temperature (cooling operation stop temperature = tSL2 ), The engine E is configured to automatically stop. Therefore, during heating, burnout due to abnormally high temperature at the outlet of the condenser 1 can be prevented, and during cooling, freezing phenomenon at the outlet of the evaporator 1 can be prevented.
次に、冷暖房時の運転制御を第２図のフローチ
ヤートを参考にして説明する。自動運転の場合
に、まず、外部運転指令に基づいて、第１ポンプ
Ｐ１を起動させ、熱負荷８の温度を反映する蓄熱
槽７の温度が運転開始温度（冷房＝tSH1，暖房＝
tSL1）に達して、かつ、その温度がハンチング防
止タイマThの作動終了をもつて安定したと判断
して第２パンプＰ２を作動させ、エンジン始動に
かかる（ステツプ）。 Next, operation control during heating and cooling will be explained with reference to the flowchart shown in FIG. In the case of automatic operation, first, the first pump P1 is started based on an external operation command, and the temperature of the heat storage tank 7, which reflects the temperature of the heat load 8, is set to the operation start temperature (cooling = t SH1 , heating =
t SL1 ), and it is determined that the temperature has stabilized when the anti-hunting timer Th ends, and the second pump P2 is activated to start the engine (step).
エンジンＥを始動させ、暖機運転を３分間行つ
た後蓄熱槽７に設けられた温度センサ１４の検出
結果を基に回転数制御を行うとともに、タイマ
T1による一定時間経過後冷暖房時に関係なく、
低温熱交換流体循環経路５における蒸発器３出口
側温度センサS1がエンジン停止温度（tSS＝15℃）
より上昇した温度（tC）を感知した場合に、エン
ジンＥにオーバロードがかかるのでエンジンＥを
停止させる。又、前記温度センサS1がエンジン停
止温度tSSより低い温度を感知する場合には、冷
房時においては前記温度センサS1の検出温度t2が
冷房時運転停止温度（tSL2＝５℃）より低くなつ
た状態、及び、暖房時においては検出温度t2′が
暖房時運転停止温度（tSH2＝50℃）より高くなつ
た状態でエンジンＥを停止する（ステツプ）。 After starting the engine E and performing warm-up operation for 3 minutes, the rotation speed is controlled based on the detection result of the temperature sensor 14 provided in the heat storage tank 7, and the timer
After a certain period of time due to T 1 , regardless of heating or cooling,
The temperature sensor S1 on the outlet side of the evaporator 3 in the low temperature heat exchange fluid circulation path 5 indicates the engine stop temperature ( tSS = 15℃)
When a higher temperature (t C ) is detected, engine E is overloaded, so engine E is stopped. Further, when the temperature sensor S 1 detects a temperature lower than the engine stop temperature t SS , the detected temperature t 2 of the temperature sensor S 1 during cooling is the operation stop temperature during cooling (t SL2 = 5°C). The engine E is stopped when the detected temperature t 2 ' becomes lower than the operating stop temperature during heating (t SH2 =50° C.) (step).
エンジンＥを停止する場合には、まず３分間ア
イドル回転数で運転した後停止する。 When engine E is to be stopped, it is first operated at idling speed for 3 minutes and then stopped.
手動運転の場合には、エンジンＥは熱負荷８温
度と関係なく定速運転されるが、蒸発器３及び凝
縮器３の出口側温度t2，t2′が冷暖房時運転停止温
度tSL2，tSH2を越えた場合には機器に損傷が起るの
で、エンジンＥを停止する（ステツプ）。この
場合にエンジンＥの始動・停止方法は自動運転の
場合と同様である。 In the case of manual operation, the engine E is operated at a constant speed regardless of the heat load 8 temperature, but the outlet side temperatures t 2 and t 2 ' of the evaporator 3 and condenser 3 are the cooling/heating operation stop temperature t SL2 , t If SH2 is exceeded, equipment will be damaged, so stop engine E (step). In this case, the method of starting and stopping the engine E is the same as in the case of automatic operation.
図面は本発明に係るエンジン駆動型ヒートポン
プの実施例を示し、第１図はエンジン駆動型ヒー
トポンプの全体構成図、第２図は制御フローチヤ
ートである。
Ｅ……エンジン、１……凝縮器、３……蒸発
器、５……低温熱交換流体経路、６……高温熱交
換流体経路、８……熱負荷、１２……制御手段、
S1，S2……温度センサ。
The drawings show an embodiment of an engine-driven heat pump according to the present invention, and FIG. 1 is an overall configuration diagram of the engine-driven heat pump, and FIG. 2 is a control flowchart. E... Engine, 1... Condenser, 3... Evaporator, 5... Low temperature heat exchange fluid path, 6... High temperature heat exchange fluid path, 8... Heat load, 12... Control means,
S 1 , S 2 ...temperature sensor.
Claims (1)
Ｅに対して回転数制御及び発停制御を行う自動運
転モードと定速連続回転させる手動運転モードに
切換え可能に構成したエンジン駆動型ヒートポン
プにおいて、凝縮器１に対する高温熱交換流体経
路６と蒸発器３に対する低温熱交換流体経路５と
に夫々温度センサS2，S1を設け、手動運転モード
時において、暖房時に高温熱交換流体が設定温度
以上になつた場合に、及び、冷房時に低温熱交換
流体が設定温度以上になつた場合に、エンジンＥ
を自動停止させる制御手段１２を有するエンジン
駆動型ヒートポンプ。1 In an engine-driven heat pump that is configured to be switchable between an automatic operation mode in which the engine E is controlled in rotation speed and controlled to start and stop in response to load fluctuations in the heat load 8, and a manual operation mode in which the engine E is continuously rotated at a constant speed, the condenser Temperature sensors S 2 and S 1 are provided in the high-temperature heat exchange fluid path 6 for the evaporator 1 and the low-temperature heat exchange fluid path 5 for the evaporator 3, respectively. If the temperature of the low temperature heat exchange fluid exceeds the set temperature during cooling,
An engine-driven heat pump having a control means 12 for automatically stopping the heat pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61097746A JPS62255768A (en) | 1986-04-25 | 1986-04-25 | Engine-driven heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61097746A JPS62255768A (en) | 1986-04-25 | 1986-04-25 | Engine-driven heat pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62255768A JPS62255768A (en) | 1987-11-07 |
| JPH044511B2 true JPH044511B2 (en) | 1992-01-28 |
Family
ID=14200450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61097746A Granted JPS62255768A (en) | 1986-04-25 | 1986-04-25 | Engine-driven heat pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62255768A (en) |
-
1986
- 1986-04-25 JP JP61097746A patent/JPS62255768A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62255768A (en) | 1987-11-07 |
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