JPS63116019A - Hot water supplier - Google Patents

Abstract

PURPOSE:To attempt to reduce noises by fan by burning a burner during supplying hot water, and at the same time rotating a fan to supply combustion air to the burner, and driving the fan when the stopping of the hot water supply is detected, until the water temperature at the outlet port section of a heat exchanger falls to a set temperature. CONSTITUTION:If a switch 3 for both start and stop is turned ON during supplying hot water, electric current is passed through a self-holding type solenoid 27 through a water plug control circuit 30 to open a pilot valve 25 and also open a water plug 17. Then a fan 29 is rotated by a combustion control circuit 34 and then an ignition device 33 is operated, and at the same time a solenoid valve 15 is opened to supply gas to a gas burner 10 for combustion. This ignition is detected by a flame detection circuit 31, and the operation of the ignition device 33 is stopped, and hot water is discharged from a hot water discharge pipe 38. For stopping the hot water discharge, a switch 3 is operated and electric current is passed through a solenoid 27 by a water plug control circuit 30 to close the water plug 17. Then, the output of a hot water temperature sensor 35 and a set temperature which has been set beforehand are compared by a comparison circuit 35 and if the former is below the set temperature, then the air supply fan 29 is stopped.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention has a fan k (N
Add 1 to the multiplication table for the water heater.

(b) Conventional technology A heat exchanger in which a fan is installed to supply burning air to a burner that heats the heat exchanger at 710°C, for example,
As shown in Publication No. 47354, even when the hot water C is stopped and the burner is extinguished, the above-mentioned fan continues to rotate for a certain period of time to prevent the boiling after boiling, etc., but the above-mentioned fan Since it is controlled in terms of time, even when there is little possibility of after-boiling, such as when hot water is tapped at a low temperature, the fan r may rotate and cause noise.

(/1 Problem to be solved by the invention The purpose of the invention is to reduce the noise caused by the fan.

2) Means for solving the problem The present invention is a heat exchanger? A fan is used to forcefully blow air for combustion to the burner, which heats the burner, and the water temperature at the outlet of the heat exchanger is detected.The water temperature is only 1 centimeter, and the water is passed to the heat exchanger? A running water switch is provided to detect the hot water, and a fan drive means is provided to continue rotating the fan until the output of the off hot water temperature setting of the running water switch drops below the set temperature due to stopping of hot water supply.

(E) Function: During hot water tapping, the burner is burned and 7 am is turned to supply all the fuel for combustion to the burner, and when the water tap is turned off and the hot water tap is stopped, the fan drive means is activated. The fan is driven seven times until the water temperature at the outlet of the heat exchanger drops to a predetermined set temperature.

(f) Example An example of the present invention will first be explained based on FIG.
1) is an exterior case that constitutes the main body of the appliance, and has an operation panel (2) on the lower front surface (the bottom operation panel has a start/stop switch f (31), a hot water temperature adjustment knob (4), and a capacity adjustment knob (5). ), etc. Also, the above-mentioned exterior case (
1) As shown in Figure 2, the circle has a hot spring B (6) in the middle.
k connection and a water governor (7) on the upstream side of this heat exchanger.
J1 above? #A water flow control valve (8) rotated by a temperature control knob (4) is installed, and a water flow channel (9) and a gas burner 4 that heats the heat exchanger [67k 71111] and a fuel channel that supplies fuel to this gas burner are installed. (111$k is installed.

The improved water distribution governor (7) moves with a diaphragm a- which detects the flowing water in the water passageway (9), and this diaphragm opens and closes the seat valve installed in the fuel flow path till through the spindle U41. and the fuel flow path (I
IIK is located downstream of the seat valve α3, and an electromagnetic on-off valve and a gas governor 1blt are sequentially arranged.

uDrc is connected to the downstream side of the water exchanger (6) of the above-mentioned waterway (9), and is connected with a water faucet, as shown in Figure 3. The valve part is located opposite to the upstream side of the valve and opens and closes it! 1? A diaphragm box is provided adjacent to the valve opening to form a pressure chamber at, and this diaphragm box has a valve opening αe downstream of the water passage (9), a pressure chamber 4, and a valve opening α upstream. A pilot hole 2 and a communication hole which communicate the pressure chambers 1 and 2 are completely bored. And the pressure chamber mountain portion iC, the pilot hole c! The pilot valve 2r is opened and closed and is attached to a pilot valve 6 which is biased in the closing direction of the pilot hole 4 by means of a spring ring, and this pilot valve is driven to open and close by a self-holding solenoid via a lever Wk.

In addition, the heat exchanger (6) and gas burner C1 (1) are housed in the combustion chamber (toward), and an air supply fan that supplies all the air for combustion to the gas burner (IG) is installed on the lower side wall of the combustion chamber. are connected.

Figure 4 is a block diagram showing the 111H31 circuit, which includes the faucet control circuit (to) that detects the on/off of the start/socket switch (3) and controls the self-holding solenoid @. The output of the flame detection circuit wXCtυ that detects the combustion state of the gas burner QIJ is linked to the above-mentioned spindle α4 to detect the on/off state of the flow water switch y'', and the igniter is used to ignite the gas burner αl)'5. A comparison is made in which the output of the combustion control circuit controlling the output side closing valve Ct51k III and the temperature of the thermistor etc. installed at the outlet part VC of the heat exchanger (6) is compared with the predetermined setting 1st shift. Circuit (to) and this comparison time i57: and combustion 1i
The output of the i1 cooling circuit example is set to 7 power, and the fan drive circuit 87) which controls the above-mentioned l @ air fan capacitor t * t + t + t + t + t + t + t + the output of the output circuit 87) is obtained.

On the other hand, the water faucet α7 of the water passageway (9) is installed downstream of the water faucet r1η shown in FIG. In this case, the VC is the start/stop switch y'''.
(3) Open the faucet Gnr by turning it on seven times, and then open and close the hot water tap (G). The combustion control circuit of the gas burner αG can be used as a so-called stop-start water heater.

In the case of the main stop installation shown in Fig. 1, turn on the Kd start/stop switch (3) at the time of hot water dispensing.
Water faucet III - A well-known one-tap faucet by energizing the self-holding solenoid in Kasumi and opening the pilot valve Gt.
*Develop. Then, the diaphragm is deformed by the water flowing into the water passageway (92), and at the same time as the seat valve α3 opens, the flow valve switch ft3 is turned on, and the combustion control circuit (b) first rotates the air supply fan, and then the igniter At the same time as creating in step (2), open the magnetic on-off valve σ9 to supply gas to the gas burner C11 and burn it.When the gas burner σ ignites, the flame detection circuit detects this and activates the igniter can. Stop the hot water and discharge hot water from the hot water tap ■.If you want to stop the hot water supply, press the start/stop switch y-[3) 'k again.
When operated, the self-holding solenoid is energized in the faucet control circuit a to close the faucet αη. As a result, the running water switch 51- is turned off, so when this is detected in step St shown in FIG. 6, step 82 is executed in the combustion control circuit (b), and the process proceeds to step S3. In the comparative circuit country, the output of the hot water temperature center t■ is set in advance and compared with the preset temperature, and if this is, for example, 50°C or lower, the air supply fan is selected in step S4. When it stops, the operation lamp (not shown)? If you leave it, the lights will go out,
If it is 50℃ or higher, step S after the temperature drops to 50℃ or lower.
Proceed to step 4.

On the other hand, in the case of the pre-stop installation shown in Fig. 5, when the start/stop switch (31) is operated to open the faucet aη7 as described above, and then the hot water tap u9 is opened, the running water switch is activated. This is detected and combustion!II-Circuit (b) supplies air 7
After burning the hot gas burner σ■ which rotated the fan 1 to raise the hot water, and extinguishing the gas burner 01 by closing the hot water tap, delay control of the air supply fan 4 is performed in the same manner as above.

()) Effects of the Invention With the configuration according to the present invention, it is possible to prevent afterboiling by using all of the 77 liters of combustion air supplied to the burner, and at the same time, the 77 liters can be used to maintain the temperature at the outlet of the heat exchanger. By controlling the delay accordingly, unnecessary fan rotation can be prevented.

[Brief explanation of the drawing]

An embodiment of the present invention shown in Fig. 1? The front view shown in FIG.
FIG. 4 is a block diagram of the control circuit, FIG. M5 is a front view showing another embodiment, and FIG. 6 is a flowchart. (6)...Heat exchanger, C1G...Gas burner,
...Air supply fan, 33...Water switch, Field...Temperature sensor, c177...7 drive circuit.

Claims (1)

[Claims] (1) A burner that heats the heat exchanger is provided with a fan that forcibly blows air for combustion, and a hot water temperature sensor that detects the temperature of the hot water at the outlet of the heat exchanger, and A water flow switch is provided to detect the flow of water to the vessel, and fan driving means is provided to continue rotating the fan until the output of the hot water temperature sensor drops below the set temperature after the water flow switch is turned off by stopping the hot water supply. Water heater.