JPS5833495Y2 - hot air heater - Google Patents

Description

[Detailed description of the invention] This invention eliminates the discharge of cold air to the front when starting the hot air heater by delaying the operation time of the electric blower and electric exhaust fan, and also eliminates the residual gas at the end of operation. The purpose is to prevent leakage.

In conventional heating machines, when the heater is started, the electric blower is driven even though the burner and heat exchanger have not yet warmed up, so cold air is discharged from the outlet and used. This has the disadvantage of making people feel cold, and because the electric exhaust fan stops immediately when the heater ends, residual gas leaks from the lower end of the exhaust hood and contaminates the room.

The present invention has been devised to eliminate the above-mentioned drawbacks and will be explained in detail below with reference to an embodiment shown in the drawings.

First of all, in Fig. 1, 1 has upper and lower discharge ports 2,
The device is a hollow device body with a suction port 3 formed at the rear surface and a burner 5 having a combustion cylinder 4 having a truncated conical cross section at the bottom thereof.

The burner 5 consists of an oil sump 6 for storing fuel, a flat combustion wick 7 that sucks up the fuel from the oil sump 6 and burns it at its upper end, and an outer flame plate 8 for good combustion. ing.

Reference numeral 9 designates an operating shaft with a bastard 10 attached to one end, and the other end is connected to the combustion wick 7 via a well-known wick up-and-down mechanism to rotate the bastard 10 during ignition operation. The combustion wick 7 is moved upward.

Reference numeral 11 denotes a well-known ignition mechanism, and by pressing a press lever 12, an ignition switch 13 is closed as shown in FIG. 3, and the ignition heater 14 is energized.

Reference numeral 15 indicates a switch that is closed when the anti-seismic automatic fire extinguishing system is set.

16 is an exhaust hood that covers the upper part of the combustion tube 4,
The lower end is opened to form a gap 17 between the lower end and the upper end of the combustion tube 4, and the upper wall is connected to a heat exchanger 18 installed at the rear of the appliance main body 1 by a connecting pipe 19. ing.

Reference numeral 20 denotes an electric exhaust machine with a built-in motor 21 and fan 22, which is fixed to the outside of the wall 23 with appropriate fixing fittings 24, and is forcibly discharged the exhaust gas that has flowed into the heat exchanger 18 to the outside. .

25 is a bellows-shaped flexible tube that connects the heat exchanger 18 and the electric exhaust fan 20, and 26 is a plug.

Reference numeral 27 denotes an electric exhaust fan installed at the rear lower part of the appliance main body 1, and the air sucked in from the suction port 3 is transferred to the heat exchanger 18.
The fuel is discharged from the front discharge ports 2, 2' via the combustion tube 4.

Next, the electric circuit shown in FIG. 2 will be explained.

28 is the first point to be observed from the movable contact A and the fixed contacts a, b, and c.
It is a changeover switch, and the movable contact A has a safety fuse 2.
The electric blower 27 and the first thermally responsive switch 3 are connected to the power supply terminal L1 through the fixed contact point C.
The power supply terminal L2 is connected through 0.

The first heat-responsive switch 30 is attached to the front surface of the heat exchanger 18 and is closed when the temperature inside the appliance body 1 rises above a certain level. The power will be turned on after a certain period of time has elapsed.

Further, the electric blower 2T rotates strongly by connecting the movable contact A to the fixed contact C, and connects the movable contact A to the fixed contact C.
Rotates weakly by connecting to.

31 is a movable contact A' and a fixed contact b/. A second changeover switch separated from C' is used to connect the motor 21 of the electric exhaust fan 20.
and the indicator light 32, and this series circuit is connected in parallel to the series circuit of the changeover switch 28, the electric blower 27, and the first thermally responsive switch 30.

Further, the first changeover switch 28 and the second changeover switch 31 are structured to be interlocked, and an external operation knob (not shown) is connected to the first changeover switch 28 and the second changeover switch 31.
It is operated by.

Reference numeral 33 designates a normally open type second thermal response switch installed near the burner 5, which is connected in parallel to the second changeover switch and is closed when the temperature near the burner 5 exceeds a certain level.

When the second thermally responsive switch 33 is provided in this manner, even if the second changeover switch 31 is turned off, the switch 33 remains closed due to the residual heat of the burner 5, so that the motor of the electric exhaust evacuator 20 is closed for a certain period of time. 21 is energized.

The actions of these first and second thermally responsive switches 30 and 33 are
If two thermally responsive switches 34 are used for the same purpose, a circuit as shown in FIG. 4 may be used.

That is, the fixed contact a of the first changeover switch 28 and the movable contact A' of the second changeover switch 31 are short-circuited, and the instrument is connected between the movable contact A of the first changeover switch 28 and the second changeover contact b'. A thermally responsive switch 34 may be inserted that senses the temperature within the main body 1, for example, the temperature near the burner 5, and closes when the temperature reaches a certain temperature or higher.

With this configuration, only one thermally responsive switch is required and the switch can be manufactured at low cost.

35 is a rectifier circuit 3 in which four diodes are bridge-connected.
6 and a capacitor 37, and a solenoid 38 is connected to this DC power terminal.

Reference numeral 39 is a plunger that is slidable inside the solenoid 38. Normally, the plunger is pushed by a spring or the like to operate the anti-seismic automatic fire extinguishing device 40, and when the solenoid 38 is energized, it is attracted by the solenoid 38 and operates the anti-seismic automatic fire extinguishing device 40. The automatic fire extinguishing device 40 can be set.

That is, under normal conditions, the tip of the plunger 39 protrudes above the mounting portion 42 (shown in the first diagram) of the weight 41 in the anti-seismic automatic fire extinguishing system 40, and when the solenoid 38 is energized, it is attracted by the solenoid 38. The tip of the plunger 39 is retracted from above the mounting portion 42 .

Therefore, when the solenoid 38 is de-energized, the tip of the plunger 39 gets in the way and the anti-seismic automatic fire extinguishing device 40 cannot be set, but when the solenoid 38 is energized, the tip of the plunger 39 is placed on the mounting portion 42. Since it is recessed from above, the anti-seismic automatic fire extinguishing device 40 can be set freely.

43 is a normally closed type first heat-sensitive switch fixed to the exhaust hood 16, and the exhaust gas suction action is no longer generated due to a failure of the electric exhaust fan 20 or separation of the flexible pipe 25 from the device main body 1. In this case, an abnormal temperature rise in the device main body 1 is sensed and the energization to the solenoid 38 is cut off.

44 is a normally closed second valve installed at the discharge part of the heat exchanger 18.
If the heat exchange efficiency of the heat exchanger 18 deteriorates due to a failure of the electric blower 27, etc., the heat-sensitive switch senses an abnormal temperature rise in the exhaust gas and cuts off the power to the solenoid 38.

Note that 45 is a humidifying dish, and 46 is a substrate.

Here, the operation of the present invention will be explained.

First, when a main switch (not shown) is turned on to energize the solenoid 38, the plunger 39 is attracted and its tip retracts from above the mounting portion 42 of the weight 41.

When the anti-seismic automatic fire extinguishing device 40 is set, the switch 15 of the ignition heater 14 is closed (as shown in the third figure) in conjunction with this.

Next, rotate the eldest child 10 and move the combustion wick I upward to move the ignition mechanism 1
When the pressure lever 12 of No. 1 is pressed, the ignition switch 13 is closed in conjunction with the pressing operation of the suppression lever 12, and the ignition heater 14 is energized. At the same time, the oil sucked up by the combustion wick 7 is released at its upper end. The vaporized ignition heater 14
The fuel is ignited and a well-known combustion takes place.

Meanwhile, the movable contacts A and A of the first changeover switch 28 and the second changeover switch 31 are operated by operating an external operation knob (not shown).
′ is connected to the fixed contacts b and b′, the temperature inside the appliance body 1 is low at the beginning of ignition, so the thermal response switch 3
0.33 or 34 (shown in the fourth diagram) is open, so only the motor 21 of the electric exhaust fan 20 is energized, and the exhaust gas generated from the burner 5 is passed through the combustion tube 4 - exhaust hood 16 -
The heat exchanger 18 is discharged outdoors through the flexible tube 25.

Then, when the burner 5 enters the normal combustion state and the temperature inside the appliance body 1 reaches a predetermined temperature, the thermal response switch 30.33 is activated.
Alternatively, 34 is automatically closed and the electric blower 27 is energized, and the cold air flowing in from the suction port 3 absorbs heat in the combustion tube 4 and the heat exchanger 18, and then becomes warm air and is then discharged from the upper and lower discharge ports 2, 2'. Forced air is blown into the room.

After that, while rotating the heir 10 and lowering the combustion wick 7,
Movable contact A of the first and second changeover switches 28.31,
A' is fixed contact a.

When switched to a', the electric blower 27 is immediately de-energized, but the motor 21 of the electric exhaust fan 20 is energized for a certain period of time via the thermally responsive switch 33 or 34.

That is, the motor 21 is supplied with power via the thermally responsive switch 30, 33 or 34 so that the thermally responsive switch 30, 33 or 34 maintains the closed state while the appliance main body 10 is still warm.

Therefore, the exhaust gas that continues to burn for a while after the fire extinguishing operation is forced to be sent outdoors by the action of the electric exhaust fan 20 without leaking from the lower end of the hood 16.

Now, when the suction action of the electric exhaust fan 20 ceases to occur due to a normal combustion condition or the like, the high-temperature exhaust gas hits the top plate of the exhaust hood 16 and leaks outside through the gap 17, causing the temperature of the appliance body 1 to rise abnormally. However, at this time, the first heat-sensitive switch 43 senses an abnormal temperature rise in the main body 1 of the device, opens when the temperature exceeds a certain level, and cuts off the power to the solenoid 38.

Then, the plunger 39 slides into the solenoid 38 due to its own weight or a biasing force such as a spring, drops the weight 41 at its tip, and activates the anti-seismic automatic fire extinguishing device 40.

In addition, if the electric blower 27 breaks down for some reason, the heat exchange efficiency of the heat exchanger 18 will deteriorate, and the temperature of the exhaust gas passing through the heat exchanger 18 will be extremely high. The switch 44 senses this, cuts off the power to the solenoid 38, and activates the anti-earthquake automatic fire extinguishing system 40.

It should be noted that during a power outage, the solenoid 38 is not energized, as described above, so the anti-seismic automatic fire extinguishing device 40 is operated in the same manner as described above to prevent an accident due to an abnormal temperature rise in the appliance body 1, etc.

Since the present invention has the above-mentioned structure, it is possible to eliminate the cold air discharge to the front when starting the warm air heater, and also prevent the leakage of residual gas at the end of operation. Of course, the structure is such that only the electric exhaust fan is driven when the device is ignited and extinguished, and both the electric exhaust fan and the electric blower are driven during normal combustion, so the electric blower is stopped when the equipment is ignited and extinguished. This has the remarkable effect of eliminating unnecessary air blowing and saving electricity.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of the hot air heater of the present invention, Figure 2 is the electric circuit diagram of Figure 1, Figure 3 is the ignition heater circuit diagram of the warm air heater of the present invention, and Figure 4 is the electric circuit diagram of the hot air heater of the present invention. The electric circuit diagram of another Example in a wind heater is shown. 1... Appliance body, 5... Burner, 18... Heat exchanger, 20... Electric exhaust fan, 27... Electric blower,
30,33゜34...Thermal response switch.

Claims (1)

[Scope of utility model registration request] It has a burner, a heat exchanger, an electric exhaust fan, and an electric blower, and has two independent passages for exhaust gas and hot air to pass through, and also senses the temperature inside the appliance body and when the temperature reaches a certain level. In a hot-air heater that is equipped with a thermally responsive switch that closes when the thermally responsive switch closes, and that controls an electric blower and an electric exhaust fan to delay the operation time, the thermally responsive switch is used to control the ignition of the equipment. Initially, the electric exhaust fan circuit is closed and the electric blower circuit is opened, and when the equipment is extinguished, the electric exhaust fan circuit is closed and the electric blower circuit is opened. A hot air heater that is characterized by being connected to a circuit.