JP2555851B2 - Water heater - Google Patents

Water heater

Info

Publication number
JP2555851B2
JP2555851B2 JP4345153A JP34515392A JP2555851B2 JP 2555851 B2 JP2555851 B2 JP 2555851B2 JP 4345153 A JP4345153 A JP 4345153A JP 34515392 A JP34515392 A JP 34515392A JP 2555851 B2 JP2555851 B2 JP 2555851B2
Authority
JP
Japan
Prior art keywords
water
flow rate
amount
opening
minimum
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
Application number
JP4345153A
Other languages
Japanese (ja)
Other versions
JPH06174303A (en
Inventor
晶 吉田
誠 濱田
富雄 三宅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Noritz Corp
Original Assignee
Noritz Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Noritz Corp filed Critical Noritz Corp
Priority to JP4345153A priority Critical patent/JP2555851B2/en
Publication of JPH06174303A publication Critical patent/JPH06174303A/en
Application granted granted Critical
Publication of JP2555851B2 publication Critical patent/JP2555851B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、水量調整弁及び水量検
出装置を備え、水量検出装置が最低作動水量(MOQ)
の確認を行う給湯器に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a water amount adjusting valve and a water amount detecting device, and the water amount detecting device is a minimum operating water amount (MOQ).
Regarding the water heater to check.

【0002】[0002]

【従来の技術】従来、熱交換器への流入水量を検出する
水量検出装置と、入水温度を検出する水温検出装置と、
流出する湯の温度を検出する出湯温度検出装置と、通水
量を調節する水量調整弁とを備え、流入水量、入水温
度、設定温度及び加熱器の加熱能力に基づいて定常運転
時における水量調整弁の必要開度を設定する給湯器にお
いて、出湯開始時に水量調整弁の開度を上記設定された
必要開度よりも小さい初期開度に絞って固定し、出湯温
度の上昇に応じて水量調整弁の開度を徐々に大きくし、
上記設定開度に達すると定常運転に移行する制御方法が
知られている(例えば、特開平1−302063号公報参
照)。
2. Description of the Related Art Conventionally, a water amount detecting device for detecting the amount of water flowing into a heat exchanger, and a water temperature detecting device for detecting an incoming water temperature,
Equipped with a hot water temperature detection device that detects the temperature of the hot water that flows out, and a water amount adjustment valve that adjusts the water flow rate.The water amount adjustment valve during steady operation based on the inflow water amount, the incoming water temperature, the set temperature, and the heating capacity of the heater. In the water heater that sets the required opening of the hot water supply valve, the opening of the water quantity adjusting valve is fixed at the initial opening smaller than the required opening when the hot water is started, and the water quantity adjusting valve is adjusted according to the rise of the hot water temperature. Gradually increase the opening degree of
There is known a control method of shifting to a steady operation when the set opening is reached (for example, see Japanese Patent Laid-Open No. 1-302063).

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記従
来の給湯器制御方法においては、出湯開始初期に水量調
整弁の開度を設定開度よりも小さい初期開度に絞って固
定しているから、供給水圧が変化したことによる流量の
変動が大きく、特に供給水圧が低下した場合に流量が低
下し、給湯器が確実に出湯を開始するに必要な最小作動
水量MOQに到達することができないという問題があっ
た。
However, in the above-described conventional water heater control method, since the opening of the water amount adjusting valve is narrowed and fixed to an initial opening smaller than the set opening at the beginning of hot water discharge, There is a large variation in the flow rate due to a change in the supply water pressure, and especially when the supply water pressure decreases, the flow rate decreases, and the water heater cannot reach the minimum working water amount MOQ required to reliably start hot water discharge. was there.

【0004】本発明の目的は、水量調整弁を備えた給湯
器において、出湯開始時の必要開度より小さい初期開度
を変更すること無く、低水圧においても最小作動水量を
確保することのできる給湯器を提供することである。
An object of the present invention is to ensure a minimum working water amount even at a low water pressure without changing an initial opening smaller than a required opening at the time of starting hot water discharge in a water heater equipped with a water quantity adjusting valve. It is to provide a water heater.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するため
に本発明の給湯器は、熱交換器に接続された通水路に水
量検出装置と水量調整弁とを備え、出湯停止後に水量調
整弁の開度を所定の待機位置開度に制御して待機状態に
入る給湯器において、最小作動水量より小さい最小検出
流量を予め設定し、該最小検出流量を超え、最小作動水
量以下の通水量を検知した時に、水量調整弁を開く方向
に駆動する制御手段を備えたことにより、出湯開始時の
必要開度よりも小さい開度である初期開度を変更するこ
と無く、低水圧においても最小作動水量を確保すること
ができる。
In order to achieve the above object, a water heater according to the present invention is provided with a water amount detecting device and a water amount adjusting valve in a water passage connected to a heat exchanger, and the water amount adjusting valve after the hot water is stopped. The minimum detection value that is smaller than the minimum operating water amount in the water heater that controls the opening of
The flow rate is set in advance, and when the flow rate exceeding the minimum detected flow rate and the water flow rate less than the minimum working water quantity is detected, by providing the control means for driving the water quantity adjustment valve in the direction of opening, The minimum operating water amount can be secured even at low water pressure without changing the initial opening which is a small opening.

【0006】[0006]

【実施例】本発明の実施例を図に基づいて説明する。図
1において、本発明を適用する給湯器1は、熱交換器2
と、熱交換器2の入口側に接続された入水路3と、熱交
換器2の出口側に接続された出湯路4と、2本のバーナ
要素51,52から成るガスバーナ5と、バーナ要素51,52
にそれぞれ接続されたガス管路61,62に設置されたガス
制御弁71,72と、両ガス管路61,62が合流接続されたガ
ス元管路6に配置された比例制御弁7及び元栓8と、上
記入水路3に配置されて入水量QC を検出する水量セン
サ9及び入水温度TC を検出する入水温度センサ10と、
上記出湯路4に設けられて出湯温度TH を検出する出湯
温度センサ11、流量(=QC )を制御する過流出防止機
能付水量調整弁12及び給湯栓16と、入水量センサ9及び
入水温度センサ10の熱交換器2側の入水路3と出湯温度
センサ11及び水量調整弁12の熱交換器2側の出湯路4と
を連通させるバイパス路13と、燃焼用ファン14を備えて
いる。
Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, a water heater 1 to which the present invention is applied includes a heat exchanger 2
A water inlet 3 connected to the inlet side of the heat exchanger 2, a hot water outlet 4 connected to the outlet side of the heat exchanger 2, a gas burner 5 composed of two burner elements 51 and 52, and a burner element. 51, 52
Gas control valves 71 and 72 installed in the gas pipelines 61 and 62 respectively connected to the gas pipes 61 and 62, and a proportional control valve 7 and a main valve arranged in the gas source pipeline 6 to which both the gas pipelines 61 and 62 are joined. 8, the incoming water temperature sensor 10 for detecting a disposed above fill water channel 3 input water Q water sensor 9 and the incoming water temperature C detects the T C,
Hot water temperature sensor 11 for detecting a hot water temperature T H is provided in the tapping passage 4, the flow rate (= Q C) an over-spill prevention function equipped water control valve 12 and the hot-water tap 16 for controlling, incoming water sensor 9 and the incoming water A bypass passage 13 for communicating the inlet 3 of the temperature sensor 10 on the heat exchanger 2 side with the outlet hot water temperature sensor 11 and the outlet 4 of the water quantity adjusting valve 12 on the heat exchanger 2 side, and a combustion fan 14 are provided. .

【0007】水量センサ9で検出された入水量QC と、
入水温度センサ10で検出された入水温度TC と、出湯温
度センサ11で検出された出湯温度TH とがマイクロコン
ピュータ等から成る制御器15に入力され、制御器15にお
いて、入水量QC 、入水温度TC 及び予め設定した設定
温度TS に基づいてガスバーナ5の定常運転における必
要熱量GFFを演算するとともに、設定温度TS と出湯温
度TH との偏差に基づいて補正熱量GFBを演算し、過流
出防止機能付水量調整弁12、ガス制御弁71,72、比例制
御弁7及び元栓8に駆動信号を出力する。
The amount of water input Q C detected by the water amount sensor 9,
And the incoming water temperature T C detected by the incoming water temperature sensor 10, a hot water temperature T H detected by the hot water temperature sensor 11 is input to the controller 15 comprising a microcomputer or the like, in the controller 15, input water Q C, thereby calculating the required quantity of heat G FF in the steady operation of the gas burner 5 based on the set temperature T S set incoming water temperature T C and advance, the correction amount of heat G FB on the basis of the deviation between the set temperature T S and the hot water temperature T H The calculation is performed, and a drive signal is output to the water flow control valve with overflow prevention function 12, the gas control valves 71 and 72, the proportional control valve 7, and the main plug 8.

【0008】次に過流出防止機能付水量調整弁12の制御
動作について説明する。供給水圧が通常の高さにある場
合に、給湯器が出湯を停止した待機状態にあると、過流
出防止機能付水量調整弁12は、少なくとも最小作動水量
MOQ以上を通水させる待機位置開度に絞られており、
この時の流量Qと水圧Pとの関係の一例を図2のグラフ
に示す。図2でみると、水量センサ9が確実に通水を検
出できる最小検出流量(微小流量)QMIN (例えば、1.
0 l/min.)の時の最小検出水圧PMIN =0.12kgf/cm2
あり、今、最小作動水量MOQをMOQ=2.16l/min.に
設定すると、その時の最小作動水圧MOPはMOP=0.
46kgf/cm2 となる。また、過流出防止機能付水量調整弁
12を絞っていない時の流量Qと水圧Pとの関係の一例を
図3のグラフに示しており、この場合は水圧P=0.1 kg
f/cm2 の時に流量Q=5.0 l/min.に達している。
Next, the control operation of the water flow control valve 12 with the overflow prevention function will be described. When the supply water pressure is at a normal height and the water heater is in a standby state where the hot water supply has stopped, the water flow control valve with overflow prevention function 12 has a standby position opening that allows at least the minimum operating water amount MOQ to flow. Has been narrowed down to
An example of the relationship between the flow rate Q and the water pressure P at this time is shown in the graph of FIG. As shown in FIG. 2, the minimum detected flow rate (minute flow rate) Q MIN (for example, 1.
(0 l / min.), The minimum detected water pressure P MIN = 0.12 kgf / cm 2 , and if the minimum working water amount MOQ is set to MOQ = 2.16 l / min., The minimum working water pressure MOP at that time is MOP = 0.
It will be 46 kgf / cm 2 . In addition, a water flow control valve with overflow prevention function
An example of the relationship between the flow rate Q and the water pressure P when not restricting 12 is shown in the graph of Fig. 3, and in this case, the water pressure P = 0.1 kg.
The flow rate reaches Q = 5.0 l / min. at f / cm 2 .

【0009】供給水圧が低い場合に、通水時に水圧Pが
最小作動水圧MOP=0.46kgf/cm2以下であると、最小
作動水量MOQが流れず、最小作動水量MOQを確認で
きないから燃焼を開始できない。そこで、例えば、水量
センサ9が最小検出流量QMIN =1.0 l/min.を超え最小
作動水量MOQ=2.16l/min.以下を検出している時に、
過流出防止機能付水量調整弁12を開くことにより、流量
Qを増大させて流量Q=2.16l/min.(最小作動水量MO
Q)に到達できるようにするもので、これにより、最小
作動水圧MOPをMOP=0.12kgf/cm2 にまで低下させ
ることができ、供給水圧の低い場所での使用が可能にな
る。
When the supply water pressure is low and the water pressure P is less than the minimum operating water pressure MOP = 0.46 kgf / cm 2 when passing water, the minimum operating water amount MOQ does not flow and the minimum operating water amount MOQ cannot be confirmed, so combustion is started. Can not. Therefore, for example, when the water amount sensor 9 detects the minimum detected flow rate Q MIN = 1.0 l / min. Or more and the minimum operating water amount MOQ = 2.16 l / min. Or less,
By opening the water flow control valve with overflow prevention function 12, the flow rate Q is increased and the flow rate Q is 2.16 l / min.
Q) can be reached, whereby the minimum operating water pressure MOP can be lowered to MOP = 0.12 kgf / cm 2 , and it becomes possible to use it in a place where the supply water pressure is low.

【0010】図4のフローチャートにおいて、出湯運転
を行っている定常モードにある場合は、過流出防止機能
付水量調整弁12は通常の過流出制御を行う。定常モード
ではなく、出湯運転を停止している場合、流量Qが上記
最小検出流量QMIN (1.0 l/min.)を超えた通水を検出
していない時は、過流出防止機能付水量調整弁12は待機
位置開度に固定されている。
In the flow chart of FIG. 4, when the hot water discharge operation is in the steady mode, the water flow control valve with overflow prevention function 12 performs normal overflow control. When the hot water discharge operation is stopped and the flow rate Q exceeds the minimum detection flow rate Q MIN (1.0 l / min.) And the water flow is not detected, the water flow rate adjustment function with overflow prevention function is performed. The valve 12 is fixed at the standby position opening degree.

【0011】流量Qが上記最小検出流量QMIN (1.0 l/
min.)を超え、さらに最小作動水量MOQ=2.16l/min.
を超える(MOQオン)と、出湯運転を開始し、過流出
防止機能付水量調整弁12は、流量Qを一定流量QK (例
えば、8l/min.)に制御して予め定めた設定時間tの間
この流量を保持し、この設定時間t内で燃焼を開始し、
出湯温度TH を上昇させ、設定時間tの経過後に通常の
過流出制御を行う。
The flow rate Q is the minimum detected flow rate Q MIN (1.0 l /
min.) and the minimum working water amount MOQ = 2.16 l / min.
When the MOQ is exceeded (MOQ is on), the hot water discharge operation is started, and the water flow control valve with overflow prevention function 12 controls the flow rate Q to a constant flow rate Q K (for example, 8 l / min.) To set a preset time t. This flow rate is maintained for a period of time, combustion is started within this set time t,
The hot water outlet temperature T H is raised, and after the set time t has elapsed, normal overflow control is performed.

【0012】流量Qが最小作動水量MOQ=2.16l/min.
以下(MOQオフ)である場合は、過流出防止機能付水
量調整弁12の開度を増大させ、全開位置に達するまでに
流量Qが最小作動水量MOQ=2.16l/min.を超える(M
OQオン)と、出湯運転を開始し、流量Qを一定流量Q
K (8l/min.)に制御して予め定めた設定時間tの間こ
の流量を保持し、設定時間t内で燃焼を開始し、出湯温
度TH を上昇させ、設定時間tの経過後に通常の過流出
制御を行う。過流出防止機能付水量調整弁12が全開位置
に達すると、最初の状態に帰還させる。
The flow rate Q is the minimum working water amount MOQ = 2.16 l / min.
If it is below (MOQ off), the opening of the water flow control valve with overflow prevention function 12 is increased, and the flow rate Q exceeds the minimum operating water flow rate MOQ = 2.16 l / min.
OQ ON), the hot water discharge operation is started, and the flow rate Q is kept constant
K (8l / min.) To the control to hold the flow rate between the predetermined set time t, and initiate combustion within the set time t, to increase the hot water temperature T H, usually after a set time t Overflow control is performed. When the water flow control valve with overflow prevention function 12 reaches the fully open position, it is returned to the initial state.

【0013】[0013]

【発明の効果】本発明は上述のとおり構成されているか
ら、次の通りの効果を奏する。出湯停止後に水量調整弁
の開度を所定の待機位置開度に制御して待機状態に入る
給湯器において、所定の微小流量を超え、最小作動水量
以下の通水量を検知した時に、水量調整弁を開く方向に
駆動することにより、出湯開始時の必要開度よりも小さ
い初期開度を変更すること無く、低水圧においても最小
作動水量を確保することができる。
Since the present invention is configured as described above, the following effects can be obtained. After the hot water supply is stopped, when the water heater that controls the opening of the water volume adjustment valve to a predetermined standby position and enters the standby state when it detects a water flow rate that exceeds a predetermined minute flow rate and is below the minimum operating water volume, the water volume adjustment valve By driving in the opening direction, it is possible to secure the minimum working water amount even at low water pressure without changing the initial opening smaller than the required opening at the start of tapping.

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

【図1】 本発明の実施例の給湯器の概略構成図であ
る。
FIG. 1 is a schematic configuration diagram of a water heater according to an embodiment of the present invention.

【図2】 過流出防止機能付水量調整弁を絞った時の流
量と水圧との特性図である。
FIG. 2 is a characteristic diagram of flow rate and water pressure when the water flow rate adjusting valve with an overflow prevention function is throttled.

【図3】 過流出防止機能付水量調整弁を絞っていない
時の流量と水圧との特性図である。
FIG. 3 is a characteristic diagram of the flow rate and the water pressure when the water flow rate adjusting valve with an overflow prevention function is not throttled.

【図4】 過流出防止機能付水量調整弁の制御動作を示
すフローチャートである。
FIG. 4 is a flowchart showing a control operation of a water amount adjustment valve with an overflow prevention function.

【符号の説明】[Explanation of symbols]

1 給湯器、2 熱交換器、3 入水路、4 出湯路、
5 バーナ 6 ガス元管路、7 比例制御弁、8 元栓、9 入水
量センサ 10 入水温度センサ、11 出湯温度センサ、12 水量調
整弁 13 バイパス路、14 燃焼用ファン、15 制御器(制御
手段)、16 給湯栓
1 water heater, 2 heat exchanger, 3 water inlet, 4 outlet,
5 Burner 6 Gas main line, 7 Proportional control valve, 8 main tap, 9 Water inlet sensor 10 Water inlet temperature sensor, 11 Hot water outlet temperature sensor, 12 Water amount adjusting valve 13 Bypass passage, 14 Combustion fan, 15 Controller (control means) , 16 hot water taps

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 熱交換器に接続された通水路に水量検出
装置と水量調整弁とを備え、出湯停止後に水量調整弁の
開度を所定の待機位置開度に制御して待機状態に入る給
湯器において、最小作動水量より小さい最小検出流量を
予め設定し、該最小検出流量を超え、最小作動水量以下
の通水量を検知した時に、水量調整弁を開く方向に駆動
する制御手段を備えたことを特徴とする給湯器。
1. A water passage connected to a heat exchanger is provided with a water amount detecting device and a water amount adjusting valve, and after the hot water is stopped, the opening of the water amount adjusting valve is controlled to a predetermined waiting position opening degree to enter a standby state. In the water heater, set the minimum detected flow rate that is smaller than the minimum working water volume.
A water heater provided with a control means which is set in advance and drives the water amount adjusting valve in a direction of opening when a water flow amount exceeding the minimum detected flow amount and not more than the minimum working water amount is detected.
JP4345153A 1992-12-02 1992-12-02 Water heater Expired - Fee Related JP2555851B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4345153A JP2555851B2 (en) 1992-12-02 1992-12-02 Water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4345153A JP2555851B2 (en) 1992-12-02 1992-12-02 Water heater

Publications (2)

Publication Number Publication Date
JPH06174303A JPH06174303A (en) 1994-06-24
JP2555851B2 true JP2555851B2 (en) 1996-11-20

Family

ID=18374645

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4345153A Expired - Fee Related JP2555851B2 (en) 1992-12-02 1992-12-02 Water heater

Country Status (1)

Country Link
JP (1) JP2555851B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7641769B2 (en) 2006-10-17 2010-01-05 Nichiha Corporation Suction box and dehydrator with pressurization and forming machine using thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4505739B2 (en) * 2005-04-13 2010-07-21 株式会社ノーリツ Heat source equipment
JP6260161B2 (en) * 2013-09-19 2018-01-17 株式会社ノーリツ Water heater

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01302063A (en) * 1988-05-31 1989-12-06 Rinnai Corp Water quantity controller for hot water supplying apparatus
JPH0250046U (en) * 1988-09-28 1990-04-06
JPH03175236A (en) * 1989-12-01 1991-07-30 Noritz Corp Hot-water supply apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7641769B2 (en) 2006-10-17 2010-01-05 Nichiha Corporation Suction box and dehydrator with pressurization and forming machine using thereof

Also Published As

Publication number Publication date
JPH06174303A (en) 1994-06-24

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