JPH04294211A - Flow rate detecting apparatus and fuel supplying apparatus of hot water supplier - Google Patents
Flow rate detecting apparatus and fuel supplying apparatus of hot water supplierInfo
- Publication number
- JPH04294211A JPH04294211A JP5758891A JP5758891A JPH04294211A JP H04294211 A JPH04294211 A JP H04294211A JP 5758891 A JP5758891 A JP 5758891A JP 5758891 A JP5758891 A JP 5758891A JP H04294211 A JPH04294211 A JP H04294211A
- Authority
- JP
- Japan
- Prior art keywords
- pump
- flow rate
- differential pressure
- liquid
- pipe
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims description 23
- 230000001276 controlling effect Effects 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000003208 petroleum Substances 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 description 12
- 239000007921 spray Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は、管路内を流れる液体
の流量を検出するための流量検出装置、及びその流量検
出装置を用いた給湯器の燃料供給装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow rate detection device for detecting the flow rate of liquid flowing in a pipe, and a fuel supply system for a water heater using the flow rate detection device.
【０００２】0002
【従来の技術】図３は従来の給湯器の燃料供給部を示し
ており、石油タンク１から油送り管２に導かれた石油を
、燃料ポンプ３で噴霧ノズル４に常に一定量送出してい
る。ただし噴霧ノズル４の先端部内で噴霧される石油の
一部は、油戻り管５を経由して流量調整弁６を通り、燃
料ポンプ３より上流側において油送り管２に戻される。2. Description of the Related Art FIG. 3 shows a fuel supply section of a conventional water heater, in which a fuel pump 3 always sends a constant amount of oil led from an oil tank 1 to an oil feed pipe 2 to a spray nozzle 4. There is. However, a portion of the oil sprayed within the tip of the spray nozzle 4 passes through the oil return pipe 5, the flow rate adjustment valve 6, and is returned to the oil feed pipe 2 upstream of the fuel pump 3.
【０００３】このようにして、噴霧ノズル４から前方に
噴射されて燃焼部に供給される石油の量が、油戻り管５
へ戻る石油の量を調整することによって制御されている
。In this way, the amount of oil injected forward from the spray nozzle 4 and supplied to the combustion section is controlled by the oil return pipe 5.
It is controlled by adjusting the amount of oil returned to.
【０００４】0004
【発明が解決しようとする課題】上述のようにして石油
の戻り量を制御する流量制御弁６は電磁弁であり、電磁
コイルに通電される電流値によって流量が制御される。The flow rate control valve 6, which controls the amount of oil returned as described above, is a solenoid valve, and the flow rate is controlled by the current value applied to the solenoid coil.
【０００５】しかし、電流値と流量との関係には種々の
要因で誤差が発生し、その誤差を除くために人手による
微調を行うのは、保守、管理上極めて煩雑であり、家庭
用の石油給湯器などでは、結局、燃焼に供される石油の
流量が正確に制御されない状態になってしまうことが少
なくなかった。However, errors occur in the relationship between the current value and the flow rate due to various factors, and making fine adjustments manually to eliminate these errors is extremely complicated in terms of maintenance and management. In water heaters and the like, the flow rate of oil used for combustion is often not accurately controlled.
【０００６】このような不都合を解消するためには、石
油タンク１から油送り管２へ送られる石油の実際の流量
を検出し、その検出信号によって流量調整弁６の状態を
フィードバック制御してやればよい。In order to eliminate such inconveniences, the actual flow rate of oil sent from the oil tank 1 to the oil feed pipe 2 may be detected, and the state of the flow rate regulating valve 6 may be feedback-controlled based on the detected signal. .
【０００７】しかし、家庭用給湯器などの場合、流量は
毎時０．３〜１０リットル程度と非常に少なく、そのよ
うな微少流量を正確に検出するためには非常に高価な装
置が必要となってしまう。[0007] However, in the case of domestic water heaters, the flow rate is extremely small, approximately 0.3 to 10 liters per hour, and very expensive equipment is required to accurately detect such minute flow rates. I end up.
【０００８】そこで本発明は、石油など液体燃料その他
の液体を正確に検出することができしかも低コストで構
成することができる流量検出装置及びその流量検出装置
を用いた給湯器の燃料供給装置を提供することを目的と
する。Therefore, the present invention provides a flow rate detection device that can accurately detect liquid fuel such as petroleum and other liquids and can be configured at low cost, and a water heater fuel supply device using the flow rate detection device. The purpose is to provide.
【０００９】[0009]
【課題を解決するための手段】上記の目的を達成するた
め、本発明の流量検出装置は、送液手段によって送られ
る液体が通る管路の途中に介挿され、モータで駆動され
ることによって上記管路内で上記液体を送ることができ
るポンプと、上記ポンプの上流側と下流側の上記管路の
内圧の差圧を検出するための差圧検出手段と、上記差圧
検出手段からの検出信号に応答して上記差圧がゼロにな
るように上記ポンプの駆動モータの回転を制御するため
のポンプ制御手段とを設け、上記管路内を送られる上記
液体の流量を上記駆動モータの回転数によって検出する
ようにしたことを特徴とする。[Means for Solving the Problems] In order to achieve the above object, the flow rate detection device of the present invention is inserted in the middle of a pipe passage through which liquid is sent by a liquid sending means, and is driven by a motor. a pump capable of sending the liquid within the pipeline; a differential pressure detection means for detecting a differential pressure between the internal pressures of the pipeline on the upstream and downstream sides of the pump; and a pump control means for controlling the rotation of the drive motor of the pump so that the differential pressure becomes zero in response to the detection signal, and a pump control means for controlling the rotation of the drive motor of the pump so that the differential pressure becomes zero, and the flow rate of the liquid sent through the pipe is controlled by the drive motor. It is characterized by detection based on the number of rotations.
【００１０】また、本発明の給湯器の燃料供給装置は、
常時一定量の液体燃料を送り管からノズルへ送り込むよ
うに上記送り管の途中に介挿された燃料ポンプと、上記
燃料ポンプより上流側に形成された上記送り管との合流
部まで上記燃料の一部を上記ノズルから戻すための戻り
管と、上記戻り管を流れる燃料の流量を調整するために
上記戻り管の途中に介挿された流量調整弁と、上記合流
部より上流側において上記送り管に介挿されモータで駆
動されることによって上記送り管内で上記燃料を送るこ
とができるポンプと、上記ポンプの上流側と下流側の上
記送り管内の圧力の差圧を検出するための差圧検出手段
と、上記差圧検出手段からの検出信号に応答して上記ポ
ンプの駆動モータの回転を制御するためのポンプ制御手
段と、上記駆動モータの回転数に応答して上記流量調整
弁の調整状態を制御するための流量フィードバック制御
手段とを設けたことを特徴とする。[0010]Furthermore, the fuel supply device for a water heater of the present invention includes:
A fuel pump is inserted in the middle of the feed pipe so as to constantly feed a constant amount of liquid fuel from the feed pipe to the nozzle, and the fuel is pumped up to the confluence with the feed pipe formed upstream of the fuel pump. a return pipe for returning part of the fuel from the nozzle; a flow rate adjustment valve inserted in the middle of the return pipe to adjust the flow rate of fuel flowing through the return pipe; A pump that is inserted into a pipe and driven by a motor to send the fuel within the feed pipe, and a differential pressure for detecting a pressure difference between the pressures in the feed pipe on the upstream and downstream sides of the pump. detection means; pump control means for controlling the rotation of the drive motor of the pump in response to a detection signal from the differential pressure detection means; and adjustment of the flow rate regulating valve in response to the rotation speed of the drive motor. The present invention is characterized in that it is provided with a flow rate feedback control means for controlling the state.
【００１１】[0011]
【作用】ポンプの上流側と下流側の管路内圧の差圧がゼ
ロになっているときには、管路内を流れる液体の流れに
対してポンプが何らの作用を及ぼしていない状態になっ
ている。即ち、そのときには、送液手段（燃料ポンプ）
によって送られる液体（液体燃料）の流れにポンプの動
きが完全に合致していることになり、そのときのポンプ
駆動モータの回転数から、流量を正確かつ簡単に知るこ
とができる。[Action] When the differential pressure between the upstream and downstream sides of the pump is zero, the pump is not exerting any effect on the flow of liquid flowing through the pipe. . That is, at that time, the liquid feeding means (fuel pump)
This means that the movement of the pump perfectly matches the flow of liquid (liquid fuel) sent by the pump, and the flow rate can be accurately and easily determined from the rotational speed of the pump drive motor at that time.
【００１２】また、ポンプ駆動モータの回転数に応答し
て流量調整弁の調整状態をフィードバック制御すること
によって、戻り管を流れる液体燃料の流量を正確に自動
制御して、燃焼に供される液体燃料の量を正確に制御す
ることができる。Furthermore, by feedback controlling the adjustment state of the flow rate regulating valve in response to the rotational speed of the pump drive motor, the flow rate of the liquid fuel flowing through the return pipe can be automatically and accurately controlled. The amount of fuel can be precisely controlled.
【００１３】[0013]
【実施例】図面を参照して実施例を説明する。[Embodiment] An embodiment will be described with reference to the drawings.
【００１４】図１は、石油給湯器の燃料供給部を示して
おり、石油タンク１と噴霧ノズル４とを連通する油送り
管２の途中に介挿された燃料ポンプ３によって、石油タ
ンク１内の石油が、油送り管２を通って噴霧ノズル４に
常に一定量送られる。FIG. 1 shows a fuel supply section of an oil water heater, in which a fuel pump 3 inserted in the middle of an oil feed pipe 2 that communicates an oil tank 1 and a spray nozzle 4 is used to supply oil to an oil tank 1. A constant amount of oil is always sent to the spray nozzle 4 through the oil feed pipe 2.
【００１５】噴霧ノズル４の先端部内で噴霧される石油
の一部は、油戻り管５を経由して流量調整弁６（電磁弁
）を通り、燃料ポンプ３より上流側の合流部９において
油送り管２に戻される。A part of the oil sprayed within the tip of the spray nozzle 4 passes through an oil return pipe 5 and a flow rate adjustment valve 6 (electromagnetic valve), and is collected at a confluence section 9 on the upstream side of the fuel pump 3. It is returned to the feed pipe 2.
【００１６】したがって、噴霧ノズル４から油戻り管５
を通って戻される石油の量を流量調整弁６で制御するこ
とによって、噴霧ノズル４から燃焼部１０に噴霧されて
燃焼に供される石油の量が制御される。Therefore, from the spray nozzle 4 to the oil return pipe 5
The amount of oil that is sprayed from the spray nozzle 4 to the combustion section 10 for combustion is controlled by controlling the amount of oil that is returned through the fuel tank 6 with the flow rate regulating valve 6.
【００１７】合流部９より油送り管２の上流側には、駆
動モータ２１で駆動されることによって回転して油送り
管２内で石油を送ることができるポンプ２０と、そのポ
ンプ２０の上流側と下流側の油送り管２内の圧力の差圧
を検出するための差圧センサ３０が設けられており、図
２にその構成例が示されている。On the upstream side of the oil feed pipe 2 from the confluence part 9, there is a pump 20 that is driven by a drive motor 21 to rotate and can send oil within the oil feed pipe 2, and a pump 20 upstream of the pump 20. A differential pressure sensor 30 is provided for detecting the differential pressure in the oil feed pipe 2 on the oil feed pipe 2 and the downstream side, and an example of its configuration is shown in FIG.
【００１８】図２においては、互いに噛み合う一対の歯
車２２，２３からなる歯車ポンプ２０が駆動モータ２１
によって回転駆動され、油送り管２内の石油が歯車２２
，２３の歯の間に保持されて、外周側を通って下流へ送
られる。In FIG. 2, a gear pump 20 consisting of a pair of gears 22 and 23 that mesh with each other is connected to a drive motor 21.
The oil in the oil feed pipe 2 is rotated by the gear 22.
, 23 and sent downstream through the outer circumferential side.
【００１９】この部分は合流部９より油送り管２の上流
側にあるので、この位置での石油の流量は噴霧ノズル４
から燃焼部１０に放出されて燃焼に供される石油の量と
一致する。Since this part is on the upstream side of the oil feed pipe 2 from the confluence part 9, the flow rate of oil at this position is lower than that of the spray nozzle 4.
This corresponds to the amount of petroleum discharged into the combustion section 10 for combustion.
【００２０】油送り管２内の石油は、燃料ポンプ３によ
って送られて管内を流れている。したがって、歯車ポン
プ２０によってその流れが乱され、歯車ポンプ２０の上
流側と下流側とで油送り管２内の圧力には差圧が発生す
る。Oil in the oil feed pipe 2 is sent by a fuel pump 3 and flows inside the pipe. Therefore, the flow is disturbed by the gear pump 20, and a differential pressure is generated in the oil feed pipe 2 between the upstream side and the downstream side of the gear pump 20.
【００２１】しかし、歯車ポンプ２０による送油量を、
この歯車ポンプ２０がない場合の送油量（燃料ポンプ３
の送油量から戻り量を差し引いた量）と完全に一致させ
ると、歯車ポンプ２０の存在は油送り管２内の石油の流
れを乱さず、歯車ポンプ２０の上流側と下流側とで油送
り管２内に差圧が全くない状態となる。したがって、歯
車ポンプ２０としてあまり精密でなくコストの低いもの
を用いても、歯車２２，２３間からの油漏れなどは全く
発生しない。However, the amount of oil fed by the gear pump 20 is
Oil supply amount without this gear pump 20 (fuel pump 3
(the amount obtained by subtracting the return amount from the oil supply amount), the presence of the gear pump 20 does not disturb the flow of oil in the oil feed pipe 2, and the oil flow is maintained between the upstream and downstream sides of the gear pump 20. There will be no differential pressure within the feed pipe 2. Therefore, even if a less precise and less expensive gear pump 20 is used, no oil leakage occurs between the gears 22 and 23.
【００２２】そして、このときの歯車ポンプ２０（歯車
２２，２３）の回転数がわかれば、この位置での石油の
流量（即ち、燃焼に供せられる石油の流量）がわかる。
歯車ポンプ２０の回転数は、駆動モータ２１の回転数が
わかれば特定することができる。[0022] If the rotational speed of the gear pump 20 (gears 22, 23) at this time is known, the flow rate of oil at this position (ie, the flow rate of oil used for combustion) can be found. The rotation speed of the gear pump 20 can be specified if the rotation speed of the drive motor 21 is known.
【００２３】図２において、差圧センサ３０は、歯車ポ
ンプ２０の上流側と下流側とで油送り管２に連通する連
通シリンダ３１と、そのシリンダ３１内に摺動自在に設
けられたピストン３２と、そのピストン３２に固着され
た永久磁石３３と、永久磁石３３に近接してハウジング
３４の外側に配置された感磁センサ３５などによって構
成されている。３６は、ピストン３２の進退に対して抵
抗として作用するコイルスプリングである。In FIG. 2, the differential pressure sensor 30 includes a communication cylinder 31 that communicates with the oil feed pipe 2 on the upstream and downstream sides of the gear pump 20, and a piston 32 that is slidably provided within the cylinder 31. , a permanent magnet 33 fixed to the piston 32, and a magnetic sensor 35 disposed outside the housing 34 in close proximity to the permanent magnet 33. 36 is a coil spring that acts as a resistance against the movement of the piston 32.
【００２４】感磁センサ３５としては、ホール素子や磁
気抵抗素子又はリードスイッチなどを用いることができ
、ピストン３２の両端にかかる圧力に差があるとピスト
ン３２がコイルスプリング３６のばね力に抗して移動し
、それによって永久磁石３３の位置がずれると、それが
感磁センサ３５によって検知されるようになっている。
このようにして、感磁センサ３５からの出力信号によっ
て、歯車ポンプ２０の上流側と下流側の油送り管２内の
差圧が検出される。As the magnetic sensor 35, a Hall element, a magnetic resistance element, a reed switch, etc. can be used, and if there is a difference in the pressure applied to both ends of the piston 32, the piston 32 resists the spring force of the coil spring 36. If the permanent magnet 33 is displaced due to the permanent magnet 33 moving, the magnetic sensor 35 detects this. In this way, the differential pressure within the oil feed pipe 2 on the upstream and downstream sides of the gear pump 20 is detected by the output signal from the magnetic sensor 35.
【００２５】図１に戻って、差圧センサ３０から出力さ
れる検出信号は、歯車ポンプ２０の駆動モータ２１の回
転を制御するモータ制御回路４０に入力される。Returning to FIG. 1, the detection signal output from the differential pressure sensor 30 is input to a motor control circuit 40 that controls the rotation of the drive motor 21 of the gear pump 20.
【００２６】このモータ制御回路４０は、歯車ポンプ２
０の上流側と下流側における油送り管２内の差圧がゼロ
になるように駆動モータ２１の回転を制御するようにな
っており、例えば、差圧がゼロのときの差圧センサ３０
の出力値を予め記憶しておき、その値と差圧センサ３０
からの出力値とを比較する比較器などによって形成され
ている。This motor control circuit 40 is connected to the gear pump 2.
The rotation of the drive motor 21 is controlled so that the differential pressure in the oil feed pipe 2 on the upstream and downstream sides of 0 becomes zero. For example, when the differential pressure is zero, the differential pressure sensor 30
The output value of the differential pressure sensor 30 is stored in advance and
It is formed by a comparator that compares the output value from the
【００２７】駆動モータ２１の回転数は、駆動モータ２
１の出力軸に回転数検出センサを取り付けて検出するこ
ともできるし、駆動モータ２１としてステップモータな
どを用いるときにはモータ制御回路４０から回転数信号
を取り出すこともできる。The rotation speed of the drive motor 21 is
It is also possible to detect the rotation speed by attaching a rotation speed detection sensor to the output shaft of the drive motor 21, or when a step motor or the like is used as the drive motor 21, the rotation speed signal can be taken out from the motor control circuit 40.
【００２８】このようにして、歯車ポンプ２０の上流側
と下流側の油送り管２内の差圧をゼロにして、そのとき
の駆動モータ２１の回転数から、石油の流量（即ち、燃
焼に供される石油の流量）を検出することができる。In this way, the differential pressure in the oil feed pipe 2 on the upstream and downstream sides of the gear pump 20 is made zero, and the oil flow rate (that is, the combustion The flow rate of oil supplied can be detected.
【００２９】さらに本実施例においては、駆動モータ２
１の回転数信号（即ち、実際に燃焼に供される石油流量
を示す信号）を、流量調整弁６における流量調整状態を
制御するためにフィードバックしている。Furthermore, in this embodiment, the drive motor 2
A rotational speed signal of 1 (that is, a signal indicating the oil flow rate actually used for combustion) is fed back to control the flow rate adjustment state in the flow rate adjustment valve 6.
【００３０】即ち、駆動モータ２１の回転数信号は、流
量調整弁６の状態を制御するための流調弁制御回路５０
に入力されて、油戻り管５内を戻る石油の流量が制御さ
れる。また、流調弁制御回路５０には、燃焼力を変える
ために石油の流量を設定する設定回路６０から設定信号
が入力され、駆動モータ２１の回転数によって示される
燃焼流量が、設定信号によって示される設定流量と一致
するように流量調整弁６が調整される。That is, the rotational speed signal of the drive motor 21 is transmitted to the flow regulating valve control circuit 50 for controlling the state of the flow regulating valve 6.
is input to control the flow rate of oil returning through the oil return pipe 5. Further, a setting signal is inputted to the flow regulating valve control circuit 50 from a setting circuit 60 that sets the oil flow rate in order to change the combustion power, and the combustion flow rate indicated by the rotation speed of the drive motor 21 is indicated by the setting signal. The flow rate adjustment valve 6 is adjusted to match the set flow rate.
【００３１】なお、本発明は上記実施例に限定されるも
のではなく、例えば差圧センサ３０は、上流側の圧力を
１気圧とみなして、下流側の油送り管２内の圧力だけを
検出するようにしてもよく、また、歯車ポンプ２０に代
えて種々の方式の容積ポンプを用いることができる。Note that the present invention is not limited to the above-mentioned embodiment. For example, the differential pressure sensor 30 may detect only the pressure inside the oil feed pipe 2 on the downstream side, assuming that the pressure on the upstream side is 1 atm. Alternatively, various types of positive displacement pumps can be used instead of the gear pump 20.
【００３２】[0032]
【発明の効果】本発明の流量検出装置によれば、高価な
装置を用いることなく、モータ駆動される低コストのポ
ンプを利用して微少流量を正確に検出することができ、
そして、この流量検出装置を用いて給湯器の燃料供給装
置の流量調整弁を制御することによって、燃焼状態を常
に適正な状態に維持することができる優れた効果を有す
る。[Effects of the Invention] According to the flow rate detection device of the present invention, minute flow rates can be accurately detected using a motor-driven low-cost pump without using expensive equipment.
By controlling the flow rate regulating valve of the fuel supply device of the water heater using this flow rate detection device, an excellent effect can be obtained in that the combustion state can always be maintained in an appropriate state.
【図１】実施例の全体略示図である。FIG. 1 is an overall schematic diagram of an embodiment.
【図２】実施例の流量検出装置の断面図である。FIG. 2 is a sectional view of the flow rate detection device of the embodiment.
【図３】従来例の全体略示図である。FIG. 3 is an overall schematic diagram of a conventional example.
２ 油送り管（管路） ３ 燃料ポンプ（送液手段） ４ 噴霧ノズル ５ 油戻り管 ６ 流量調整弁 ２０ 歯車ポンプ（ポンプ） ２１ 駆動モータ ３０ 差圧センサ（差圧検出手段） 2 Oil feed pipe (pipe line) 3 Fuel pump (liquid feeding means) 4 Spray nozzle 5 Oil return pipe 6 Flow rate adjustment valve 20 Gear pump (pump) 21 Drive motor 30 Differential pressure sensor (differential pressure detection means)
Claims (2)
の途中に介挿され、モータで駆動されることによって上
記管路内で上記液体を送ることができるポンプと、上記
ポンプの上流側と下流側の上記管路の内圧の差圧を検出
するための差圧検出手段と、上記差圧検出手段からの検
出信号に応答して上記差圧がゼロになるように上記ポン
プの駆動モータの回転を制御するためのポンプ制御手段
とを設け、上記管路内を送られる上記液体の流量を上記
駆動モータの回転数によって検出するようにしたことを
特徴とする流量検出装置。1. A pump that is inserted in the middle of a pipe through which liquid is sent by a liquid sending means and is driven by a motor to send the liquid within the pipe, and an upstream side of the pump. and differential pressure detection means for detecting the differential pressure between the internal pressure of the pipe on the downstream side, and a drive motor for the pump so that the differential pressure becomes zero in response to a detection signal from the differential pressure detection means. a pump control means for controlling the rotation of the liquid, and the flow rate of the liquid sent through the conduit is detected by the rotational speed of the drive motor.
へ送り込むように上記送り管の途中に介挿された燃料ポ
ンプと、上記燃料ポンプより上流側に形成された上記送
り管との合流部まで上記燃料の一部を上記ノズルから戻
すための戻り管と、上記戻り管を流れる燃料の流量を調
整するために上記戻り管の途中に介挿された流量調整弁
と、上記合流部より上流側において上記送り管に介挿さ
れ、モータで駆動されることによって上記送り管内で上
記燃料を送ることができるポンプと、上記ポンプの上流
側と下流側の上記送り管内の圧力の差圧を検出するため
の差圧検出手段と、上記差圧検出手段からの検出信号に
応答して上記ポンプの駆動モータの回転を制御するため
のポンプ制御手段と、上記駆動モータの回転数に応答し
て上記流量調整弁の調整状態を制御するための流量フィ
ードバック制御手段とを設けたことを特徴とする給湯器
の燃料供給装置。2. A fuel pump inserted in the middle of the feed pipe so as to always send a constant amount of liquid fuel from the feed pipe to the nozzle, and a confluence with the feed pipe formed upstream of the fuel pump. a return pipe for returning part of the fuel from the nozzle to the merging part; a flow rate adjustment valve inserted in the middle of the return pipe to adjust the flow rate of the fuel flowing through the return pipe; A pump that is inserted into the feed pipe on the upstream side and can send the fuel in the feed pipe by being driven by a motor, and a pressure difference between the pressure in the feed pipe on the upstream side and the downstream side of the pump. differential pressure detection means for detecting the differential pressure; pump control means for controlling the rotation of the drive motor of the pump in response to the detection signal from the differential pressure detection means; A fuel supply device for a water heater, comprising flow rate feedback control means for controlling the adjustment state of the flow rate regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5758891A JP2849488B2 (en) | 1991-03-22 | 1991-03-22 | Water heater fuel supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5758891A JP2849488B2 (en) | 1991-03-22 | 1991-03-22 | Water heater fuel supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04294211A true JPH04294211A (en) | 1992-10-19 |
| JP2849488B2 JP2849488B2 (en) | 1999-01-20 |
Family
ID=13060006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5758891A Expired - Fee Related JP2849488B2 (en) | 1991-03-22 | 1991-03-22 | Water heater fuel supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2849488B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07151095A (en) * | 1993-11-30 | 1995-06-13 | Kobe Steel Ltd | Two step type compressor |
| WO2002095340A1 (en) * | 2001-05-21 | 2002-11-28 | Oval Corporation | Servo type volumetric flowmeter |
| JP2007309727A (en) * | 2006-05-17 | 2007-11-29 | Oval Corp | Servo type volumetric flow meter with sub flow meter |
| JP2008089374A (en) * | 2006-09-29 | 2008-04-17 | Oval Corp | Flow measurement and flow control device not affected by pressure loss by Coriolis flowmeter |
| WO2008096665A1 (en) | 2007-02-05 | 2008-08-14 | Oval Corporation | Path structure for flow and differential-pressure detections in servo-type displacement flowmeter |
| AT517711B1 (en) * | 2015-11-04 | 2017-04-15 | Avl List Gmbh | Differential pressure sensor for a flowmeter and flowmeter |
-
1991
- 1991-03-22 JP JP5758891A patent/JP2849488B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07151095A (en) * | 1993-11-30 | 1995-06-13 | Kobe Steel Ltd | Two step type compressor |
| WO2002095340A1 (en) * | 2001-05-21 | 2002-11-28 | Oval Corporation | Servo type volumetric flowmeter |
| JP2007309727A (en) * | 2006-05-17 | 2007-11-29 | Oval Corp | Servo type volumetric flow meter with sub flow meter |
| JP2008089374A (en) * | 2006-09-29 | 2008-04-17 | Oval Corp | Flow measurement and flow control device not affected by pressure loss by Coriolis flowmeter |
| WO2008096665A1 (en) | 2007-02-05 | 2008-08-14 | Oval Corporation | Path structure for flow and differential-pressure detections in servo-type displacement flowmeter |
| US7905141B2 (en) | 2007-02-05 | 2011-03-15 | Oval Corporation | Path structure related to flow of fluid to be measured and pressure difference detection in servo type volumetric flowmeter |
| AT517711B1 (en) * | 2015-11-04 | 2017-04-15 | Avl List Gmbh | Differential pressure sensor for a flowmeter and flowmeter |
| AT517711A4 (en) * | 2015-11-04 | 2017-04-15 | Avl List Gmbh | Differential pressure sensor for a flowmeter and flowmeter |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2849488B2 (en) | 1999-01-20 |
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