JPH0723813B2 - Hot air heater - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warm air heater that heats a room using warm air.

2. Description of the Related Art Generally, a hot air heater of this type, for example, a fan heater, has a burner 1 as a heat generating means in a main body 101 as shown in FIG.
02 is provided, and the combustion gas from the burner 102 is mixed with the air from the blower 103 provided on the rear surface of the main body to blow out from the warm air outlet 104 to heat the inside of the room. A large number of horizontal louvers 105 are provided at the warm air outlet 104 to guide the warm air in a substantially horizontal direction.

However, the above-mentioned warm air heater tends to have a higher temperature in the upper part of the heating with warm air, and when the temperature near the feet of the user is set to an appropriate temperature, the temperature near the face becomes higher. I felt uncomfortable. When the operation of the warm air heater was stopped to avoid this, the room temperature fell and it felt cold, so comfortable heating could not be obtained.

Further, since the louver 105 is fixed and the direction of warm air cannot be changed, there is a problem in that there is a large difference in the temperature distribution in the room during strong heating, medium heating, and weak heating. In other words, during strong heating, the air blown from the blower 103 is strong, so warm air is blown out far and the living space normally used by the user (a space other than the ceiling or the corners of the room) has a substantially uniform temperature distribution. However, the amount of air blown from the blower 103 also becomes weaker as it becomes weaker and weaker, and as a result, the draft action of warm air becomes relatively strong and the warm air reach becomes short and only the area near the heater gets hot. As a result, there is a large difference in the indoor temperature distribution between strong, medium, and weak such as uneven temperature distribution, which causes the user to feel discomfort.

The present invention has been made in consideration of such problems, and an object thereof is to obtain comfortable heating.

Means for Solving the Problems In order to achieve the above object, the present invention provides a warm air heater with a main body having a hot air outlet, heat generating means provided in the main body, and air supplied to the heat generating means. An air blower for blowing hot air from the hot air outlet, a vertically rotatable variable blade provided at the hot air outlet, a first temperature detecting section for detecting the room temperature, and a first temperature detecting section provided above the first temperature detecting section. The second temperature detecting section and the room temperature setting section for setting the room temperature change the inclination angle of the variable blade downward depending on the amount of warm air or the amount of heat generation. When the temperature difference between the first temperature detecting section and the first temperature detecting section exceeds a certain value, the amount of heat of the heat generating means is weakly fixed or the heat generating means is stopped, the variable blade is changed upward, and the blower is rotated. As a configuration with a control unit is there.

Effect The present invention allows the variable blades of the hot air outlet to operate upward due to the above-described configuration, thereby supplying air upward from the hot air outlet to circulate the air in the room, and the temperature above and below the room is substantially uniform. Can be one. Further, since the downward inclination angle of the variable blades during heating changes according to the amount of combustion, the temperature distribution in the room during heating becomes more uniform.

An embodiment of the present invention will be described below with reference to the drawings. 1 is a heater body, 2 is a front plate mounted on the front surface of the heater body 1, and has a warm air outlet 3. Reference numeral 4 denotes a burner provided in the heater main body 1, which serves as heat generating means. In this embodiment, a vaporization type burner for vaporizing and burning kerosene is used. A burner case 5 covers the lower portion of the burner 4 and is attached to the partition plate 6. Reference numeral 7 denotes a combustion cylinder that covers the upper portion of the burner 4, which is erected on the partition plate 6, and a honeycomb-shaped exhaust gas purifying catalyst 8 is provided at the upper opening. Reference numeral 9 is a duct provided in the heater main body 1 so as to cover the combustion cylinder 7, and an opening 10 is formed in the lower front portion. Reference numeral 11 denotes a convection blower mounted so as to face the rear of the duct, which is covered by a fan guard 12 and supplies the indoor air sucked from the outside of the heater main body 1 into the duct and from the combustion cylinder 7 in the duct 9. It is made to be mixed with the combustion gas of and blown out from the hot air outlet 3.

14 is an outlet frame provided in the lower opening 10 of the duct 9,
Support fittings 13 with both sides attached to both side plates 1a of the heater body 1
(See Fig. 2). The outlet frame 14 is formed to have a concave cross section, and an opening 15 is formed in the bottom wall thereof. The opening 15 is aligned with the opening 10 of the duct 9 and the frame edge is formed.
14a is brought into contact with the inner surface of the front plate 2 so that the opening 1 of the duct 9
0 and the hot air outlet 3 are connected. A guide piece 16 in a substantially horizontal direction is attached to the lower edge of the outlet frame opening 15 and is heat-resistant painted or holo-finished so as not to discolor.

The reference numeral 18 designates an outlet frame 14 so as to be located above the warm air outlet 3.
The variable blade provided on the upper part is formed wide so as to cover approximately the upper half of the outlet frame 14, and the inner surface thereof is an arcuate surface 18a. As shown in FIG. 2, this variable vane 18 has a support fitting in which a shaft 19 projecting from both ends thereof is attached to the side plate 1a of the heater body.
It is made to penetrate through 13 and is rotatable as shown by arrow d.
Reference numeral 20 is a linking cam provided on one of the shafts 19 of the variable blades 18, and has a pin shaft 21. Reference numeral 23 is a link plate for swinging the variable vanes 18, the upper portion of which is directly rotatably directly connected to the pin shaft 21 of the linking cam 20 and the lower portion of which is provided with springs 24a and 24b.
3a and 23b are provided. Reference numeral 25 is a drive motor that moves the link plate 23 up and down, and is composed of a stepping motor that can rotate in the forward and reverse directions. A drive cam 26 is attached to the motor shaft of the stepping motor.
The drive shaft 27 of the drive cam 26 has the springs 24a, 24
b is attached and linked to the lower protrusions 23a and 23b of the link plate 23.

Reference numeral 28 is a control section for controlling the combustion section and the drive motor 25, which is constructed as shown in the block diagram of FIG. 29a and 29b are first and second temperature detecting portions such as a thermistor, and 29a is installed above or below 29b. 30
Is a room temperature setting unit that sets the room temperature, 31 is a temperature detection unit 29a,
The comparison unit 32 compares the signals S1 and S2 from 29b and outputs the signal S4 that supports the upward and downward directions of the variable blade, and 32 is the temperature detection unit 29.
A determination unit that compares the signal S2 from b and the signal S3 from the room temperature setting unit 30 and outputs a signal S5 such as strong, medium, or weak according to the difference, 33 is an input of the signals S4 and S5 The variable blade is set up or down by means of the signal S5, and the combustion amount of the burner 4 and the air flow amount of the convection blower 11 are controlled based on the signal S5. Is a control unit for controlling the rotation of the.

Here, as shown in the flowchart of FIG. 5, the control unit 33 first determines whether the output signal S4 of the comparison unit 31 is upward or downward, and if it is downward, sets the angle of the variable blade 18 downward. Then, it is confirmed by the output signal S5 of the determination unit 32 whether the room temperature is higher than the set temperature, and if it is higher than the set temperature, the operation is stopped. If the temperature is below the set temperature, the combustion amount of the burner 4, the rotation speed of the blower 11, and the downward inclination angle of the variable blade 18 are set to predetermined values based on the output of the determination unit 32.

On the other hand, when the output signal S4 of the comparison unit 31 is upward, and the output signal S5 of the determination unit 32 is a weak output signal when the room temperature and the set temperature are almost the same, or the room temperature is When the output signal is higher than the set temperature and the operation is stopped, the variable blade angle is set upward, and then the combustion amount of the burner 4 and the rotational speed of the blower 11 are set to predetermined values (the blower 11 in this embodiment is used). Is set to medium rotation).
When the operation is stopped, the variable blade 18 is set to the stop position (in this embodiment, the substantially vertical direction).

The operation of the hot air heater configured as above will be described below.

First, before the start of operation, the variable vanes 18 are positioned in a substantially vertical direction as shown in FIGS. 3 and 7.

When the operation switch 36 (see FIG. 7) is turned on from this state, the output S4 of the comparison unit 31 becomes a downward signal, and when the variable vane 18 goes downward, the variable vane 18 is opened in a downward inclined shape. Then, the control unit 33 is activated by the output S5 from the determination unit 32, which is generated based on the outputs from the temperature detection unit 29b and the room temperature setting unit 30, and issues the control signal S6 to start combustion in accordance with a predetermined sequence and convection. Rotate the blower 11 for use. The variable blade 18 changes its downward inclination angle in response to the signal S6 from the control unit 33. When it is strong, it is X in FIG. 3, when it is medium, it is Y, when it is weak, it is Z, and the combustion amount and convection blower It changes according to the air flow rate. Therefore, the variable blades 18 are substantially horizontal as shown in Fig. 3X when strong combustion and strong blast are performed, but Y when the medium combustion and medium blast are used.
It becomes like and it inclines a little downward. As a result, the flow of warm air is downward than that when it is strong, and the hot air becomes like Y'in FIG. Similarly, when the combustion is weak and the air is weakly blown, the variable vanes 18 are inclined downward as shown by Z, and the hot air flows along the floor surface as shown by Z'in FIG. Therefore, even if the flow velocity of the warm air is low and it is easily affected by the draft, the warm air reaches farther than the conventional one. That is, the temperature distribution in the room is close to the temperature distribution during strong combustion, and the temperature distribution is similar for strong, medium, and weak.

The downward inclination angle of the variable blade 18 is changed as follows.

That is, as shown in FIG. 2, the drive shaft 27 of the drive cam 26 is rotated by the rotation of the motor 25 as shown by an arrow a, and the link plate 23 linked through the springs 24a, 24b is shown by an arrow b.
To descend. As a result, the link cam 20 connected to the link plate 23 by the pin shaft 21 rotates as indicated by arrow c, and the variable blade 18 integrated via the link cam 20 and the shaft 19 rotates as indicated by arrow d.

On the other hand, the temperature in the upper part of the room rises due to heating as described above, and the temperature difference between the temperature detectors 29b and 29a exceeds a certain level (for example,
If it becomes (° C. or higher), the output signal S4 of the comparison unit 31 is switched from the downward signal to the upward signal. At the same time, the temperature difference between the room temperature setting unit 30 and the temperature detecting unit 29b becomes a certain range (for example, the temperature of the temperature detecting unit 29b is in the range of 19 to 20 ° C for the room temperature setting 20 ° C), and the output signal S5 of the determining unit 32 is If the variable blade is weak, the control unit 33 outputs an upward signal to the variable blade driving unit 34 to output the variable blade.
18 is set so as to be inclined upward as shown in FIG. Then, the combustion of the burner 4 is weakened, and the blower 11 is rotated inside.
The air from the blower 11 becomes warmer than the normal warm air temperature because the blower 4 is in the middle rotation mode against the weak combustion of the burner 4, and blows upward as shown in α ′ in FIG. 6 to release the hot air in the upper part of the room. By circulating downward, the temperature difference between the top and bottom of the room can be reduced. Furthermore, when the temperature of the temperature detection unit 29b becomes higher than that of the room temperature setting unit 30 (for example, the room temperature setting 2
When the temperature of the temperature detection part 29b is 21 ° C or higher with respect to 0 ° C), the combustion of the burner 4 is stopped and the blower 11 is rotated at a medium speed. The temperature can be made uniform.

Next, when the heating is performed and the operation is stopped as described above, the variable blade drive unit 34 turns off the output from the control unit 33 and rotates the motor 25 to the original state. As a result, the link plate 23 is lifted upward, the linkage cam 20 is rotated in the direction opposite to the arrow c, and the variable vane 18 is returned to the original state, that is, in the substantially vertical direction.

In the above embodiment, the variable blade is explained as one piece,
This may be a plurality of sheets.

Effect of the Invention As described above, in the first warm air heater of the present invention, the variable blades provided at the warm air outlet can be changed from the downward opening to the upward opening to circulate the indoor air by the wind from the blower. The temperature unevenness in the upper and lower parts of the room can be reduced and comfortable heating can be performed, and since it is only necessary to change the direction of the variable blades, it is possible to simplify the structure without providing a separate air outlet. Moreover, since the inclination angle of the downward variable blade is changed according to the amount of heat generation, the indoor temperature unevenness during heating can be reduced, and more comfortable heating can be performed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a warm air heater according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view of the same main part, FIG. 3 is an enlarged cross-sectional view of the same, and FIG. 4 is a block showing the same control part. FIG. 5 is a flow chart showing the control operation, FIG. 6 is an operation explanatory view, and FIG.
FIG. 8 is an external perspective view, and FIG. 8 is a sectional view showing a conventional warm air heater. 1 ... Main body, 3 ... Warm air outlet, 4 ... Heat generating means (burner), 11 ... Convection blower, 18 ... Variable blades, 25 ... Driving means (motor), 29a, 29b ... Temperature Detection unit, 33 ... Control unit.

Claims (1)

[Claims] 1. A main body having a hot air outlet, a heat generating means provided in the main body, a blower for supplying air to the heat generating means to blow hot air from the hot air outlet, and the warm air outlet. A variable blade that can be rotated up and down, a first temperature detection unit that detects the room temperature, a second temperature detection unit that is provided above the first temperature detection unit, and a room temperature that sets the room temperature. The inclination angle of the variable blade is changed in the downward direction according to the amount of warm air or the amount of heat generation determined by the setting unit so that the temperature difference between the second temperature detection unit and the first temperature detection unit becomes equal to or more than a certain value. And when the first temperature detection unit exceeds the set room temperature, the amount of heat of the heat generating means is weakly fixed or the heat generating means is stopped, and the variable blade is changed upward, and the blower is Hot air warming with a control unit to rotate the Machine.