JPS5851554Y2 - Forced air supply/exhaust combustion type warm air downward blowing heater - Google Patents

Description

[Detailed description of the invention] This invention sucks indoor air from the upper part of the main body case into the inside thereof through a convection fan, and uses the drawn air and high-temperature combustion accompanying forced air supply and exhaust combustion inside the main body case. Constructed to blow hot air generated by indirect heat exchange with gas from the bottom of the main case to the outside, and
The present invention relates to a forced air supply/exhaust combustion hot air downward blowing heater equipped with a temperature controller that automatically controls combustion based on the room temperature detected by a room temperature detector.

FIG. 2 shows a conventional type of such a heater.

Here, 01 is a convection fan installed in the upper part of the main body case OO of the heater, 02 is an indoor air inlet opened in the upper part of the main body case OO, 03 is a warm air outlet opened in the lower part of the main body case 00, and 04 is a Gas burner, 05 is a heat exchanger airtightly connected to burner 04, and 06 is room temperature detector 0.
This temperature regulator is connected to the burner 04 and automatically controls combustion in the burner 04 by adjusting the amount of fuel gas supplied.

In such a conventional heater, the room temperature detection device 0 is used as a means for detecting the room temperature as accurately as possible.
7 is installed near the indoor air suction port 02 at the upper part of the main body case OO, which is the starting point of the inflow of indoor air into the heater main body, that is, in the flow area of the indoor air sucked and introduced into the main body case 00 by the convection fan 01. Because conventional means were used, the following problems arose.

That is, when the room temperature detector 07 detects a room temperature above a certain level and operates the temperature regulator 06 to control the combustion stop,
If the convection fan 01 were also stopped, the air inside the main body case OO warmed by the residual heat of the heat exchanger 05 would rise and the ambient temperature of the room temperature detector 07 would fluctuate greatly. Since the room temperature cannot be detected properly, there is a restriction that the convection fan 01 must continue to rotate even when the combustion stop control is performed by the temperature regulator 06. There was a drawback that cold air continued to come out from the outlet 03 at the bottom of the OO.

As a means to solve this problem, the room temperature detector 07 is
Locations that are less affected by the residual heat of the heat exchanger 05, for example,
As shown by the chain line in Figure 2, it may be installed outside the back side of the main body case 00, but in this case, the detection response speed tends to be delayed because the air flow around the room temperature detector 07 is extremely small. Therefore, appropriate room temperature control is difficult.

The present invention was made in view of these circumstances, and
The purpose of this is to break through the conventional technology of placing a room temperature detector within the indoor air flow area inside the main body case, which is sucked into the main case by a convection fan.
That is, by arranging the room temperature detection device in a location other than the flow area of indoor air sucked in by the convection fan, the convection fan can be stopped during combustion stop control, thereby avoiding the inconvenience of blowing out cold air. The object of the present invention is to enable the room temperature detection device to sufficiently exhibit accurate and rapid room temperature detection functions.

In order to achieve the above object, the forced air supply and exhaust combustion type hot air downward blowing heater according to the present invention has the basic configuration described at the beginning, in which the air supply and exhaust fan for the forced air supply and exhaust combustion rotates. An indoor air stirring fan is attached to the shaft in a state that it is located outside the main body case, and the room temperature detection device is installed in an airflow area stirred by the stirring fan on the outside of the main body case. It has characteristics.

Due to this characteristic configuration, the following excellent effects are exhibited.

In other words, instead of installing the room temperature detector inside the main body case near the indoor air intake, where it is unavoidable to be affected by the residual heat of the heat exchanger when combustion is temporarily stopped, as in the case of conventional methods, this convection fan By placing the convection fan outside the main body case within the agitation air zone, even if the convection fan is stopped in parallel with the combustion stop control by the temperature controller, it will not be affected by heat from the heat exchanger, etc. inside the main body case. In addition, even if the room temperature detection device is placed at the back of the heater body, where air usually tends to stagnate, the room temperature can be detected accurately at all times. Since indoor air can be positively applied to the room temperature detection device by the room air stirring fan, the detection response speed of the room temperature detection device can be increased, and rapid room temperature detection is possible.

Also, as mentioned above, the convection fan can now be stopped in parallel with the combustion stop control by the temperature controller, so cold air can be blown directly into the room from the outlet at the bottom of the main body case during the combustion stop control. Conventional problems can be effectively resolved.

In this way, the synergy of these two effects has made it possible to control the room temperature in an extremely comfortable manner.

Furthermore, since the indoor air agitation fan is mounted so that it can be driven using the rotating shaft of the forced air supply/exhaust fan that is originally required and naturally provided, its mounting can be configured in a flexible manner. It also has the advantage of being relatively simple.

An embodiment of the present invention will be described below with reference to FIG.

A convection fan 1 is rotatably mounted inside the upper part of the main body case 0 of the heater, and is placed on the back of the main body case 0 at almost the same height as the convection fan 1, and the indoor air is drawn into the main body case by the rotation of the convection fan 1. An air suction port 2 for suctioning and introducing air into the interior of the 0 is opened.

On the other hand, a warm air outlet 3 is provided at the lower front of the main body case O.

A gas burner 4 and a heat exchanger 5 airtightly connected to the upper part of the gas burner 4 are disposed at an intermediate position between the upper and lower sides inside the main body case 0, and a corresponding part of the combustion air supply path 8 to the burner 4 inside the main body case 0 is disposed. is the motor 1 via the rotating shaft 11
A forced air supply/exhaust fan 9 which is rotationally driven at 0 is installed.

The rotating shaft 11 is provided to protrude outward from the back surface of the main body case 0 on the side opposite to the fan 9, and an indoor air stirring fan 12 is attached to the end of the protruding shaft. A room temperature detector 7 is installed within the agitated airflow area by the agitating fan 12.

A temperature regulator 6 is installed at a location corresponding to the inside of the main body case 0 of the fuel gas supply path 13 to the burner 4, and is used to adjust the combustion temperature of the burner 4 by adjusting the gas flow rate. 6 is connected to the room temperature detection device 7.

The temperature regulator 6 is configured to control the supply of fuel gas to the burner 4 according to the indoor temperature detected by the detector 7.

The motor 10 is configured to constantly rotate even during combustion stop control by the temperature regulator 6.

Note that if the convection fan 1 is configured to automatically stop when the fuel gas to the burner 4 is cut off, cold air will not be blown out unnecessarily.

14 is an exhaust gas discharge path connected to the heat exchanger 5, and extends to the outside of the building.

In the heater configured as described above, the indoor air sucked into the main body case 0 through the suction port 2 by the convection fan 1 converts the retained heat of the high-temperature combustion gas due to forced air supply and exhaust combustion in the burner 4 into heat. The hot air is received through indirect heat exchange in the exchanger 5, and then exits into the room from the air outlet 3 at the lower end.Therefore, this is called a forced air supply/exhaust combustion hot air downward blowing heater.

Although the room temperature detection device 7 is located in a relatively narrow space between the back surface of the main body case O and the wall surface, the air there is stirred by the stirring fan 12 and constantly circulates with the air in the entire room. Therefore, this room temperature detector 7 can accurately and quickly detect the indoor temperature without delay in response.

When the detector 7 detects a room temperature above a certain level, the regulator 6 cuts off the fuel gas supply to stop combustion in the burner 4, but since the motor 10 continues to operate, the supply/exhaust fan 9 and the stirring The fan 12 continues to rotate.

The stirring fan 12 continues to constantly apply indoor air, whose temperature gradually decreases, to the detection tool 7 after the hot smoking is stopped.

Therefore, when the room temperature falls below a certain level, the detector 7 quickly detects this without delay in response, restarts the fuel gas supply by the regulator 6, and resumes heating.

Furthermore, the indoor air stirring fan 12 also has the function of cooling the motor 10, thereby preventing the motor 10 from being abnormally overheated.

[Brief explanation of the drawing]

FIG. 1 is a schematic longitudinal sectional side view showing an embodiment of a forced air supply/exhaust combustion hot air downward blowing heater according to the present invention. FIG. 2 is a schematic longitudinal sectional side view showing a conventional one. 0...Body case, 1...Convection fan, 6...Temperature controller, 7...Room temperature detector, 9...Supply Exhaust fan, 11...
Rotating shaft, 12...Indoor air stirring fan.

Claims (1)

[Claims for Utility Model Registration] ■ Indoor air is sucked into the interior of the main body case 0 from the upper part of the main body case 0 via the convection fan 1, and the high temperature accompanying the forced air supply and exhaust combustion inside the main body case 0 is generated. A temperature controller configured to blow hot air generated by indirect heat exchange with combustion gas from the lower part of the main body case 0 to the outside, and to automatically control combustion based on the room temperature detected by the room temperature detector 7. 8 is a forced air supply/exhaust combustion hot air downward blowing heater, which is located outside the main body case O on the rotating shaft 11 of the air supply/exhaust fan 9 for the forced air supply/exhaust combustion. , Indoor air stirring fan 1
2 is attached, and the room temperature detection device 7 is installed in the stirring airflow region outside the main body case 0 by the stirring fan 12.
A forced air supply/exhaust combustion hot water downwind heating machine characterized by the following: (2) The forced air supply system according to claim (2) of the registered utility model is characterized in that the air supply/exhaust fan 9 is configured to operate at all times even when the temperature controller 6 controls combustion to stop. Exhaust combustion type warm air downward blowing heater.