JP4189080B2 - Fan heater - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fan heater, and more particularly to a technique effective when applied to agitation of air in a room heated by the fan heater.
[0002]
[Prior art]
Conventionally, fan heaters such as gas and oil blow hot air toward the floor.
[0003]
As shown in FIG. 10, in such a fan heater 10, since the heated air rises, temperature unevenness occurs, and only the upper part of the room is warmed, so that the living space is not warmed up and feels cold.
[0004]
The fan heater is provided with temperature measuring means such as a thermistor at the air supply port, and is controlled to shift to a save operation when the room temperature measured by the temperature measuring means reaches a set temperature. There is. Then, as mentioned above, if the living space is difficult to warm up, it will take longer for the room temperature detected by the temperature measurement means to reach the set temperature, and it will take time to save operation, so use gas, kerosene, etc. The amount will increase.
[0005]
[Problems to be solved by the invention]
Here, there has been proposed a technique for solving temperature unevenness and fuel consumption problems by separately installing a circulator or the like and stirring the air in the room.
[0006]
However, in such a technique, the installation work and cost for the circulator are required, and not only the workability and economy are good, but also a comfortable temperature space can be obtained only in the room where the circulator is installed. There was also a problem in terms of convenience. Furthermore, if the circulator is used, the convection speed of the air in the room is increased, so that the hot air directly hits the body and feels uncomfortable.
[0007]
In addition, a technique has been proposed in which the amount of hot air blown from the fan heater is increased to increase the convection speed, thereby alleviating unevenness at room temperature.
[0008]
However, with such a technique, since the warm air must reach the upper part from the floor of the room through the wall surface, a large air volume is required to reach the warm air over such a long distance. This is not preferable because the sound of the fan is increased and the comfort is impaired, and the amount of dust scattered by the hot air is increased. Furthermore, as in the case of using the circulator, the convection speed of the air in the room is increased, so that the hot air directly hits the body and feels uncomfortable.
[0009]
In addition, in a fan heater in which a fan for adding an additional function such as air cleaning is separately installed, such a fan is not related to the heating operation and is not a hot air discharge fan. Due to the interlocking, the air cannot be sufficiently stirred.
[0010]
Then, an object of this invention is to provide the fan heater which can stir air comfortably and can reduce the temperature nonuniformity of a room.
[0011]
[Means for Solving the Problems]
In order to solve the above-described problems, a fan heater according to the present invention includes a first passage in which a combustion device is installed and in which combustion air heated by the combustion device flows, and at a downstream position in the flow direction from the combustion device. And a second passage through which the mixing air mixed with the combustion air heated by the combustion device flows, and the first passage and the second passage joined to each other. The hot air discharge port for discharging the hot air formed by mixing the combustion air and the mixing air to the front, the third passage through which air of a predetermined temperature flows, and the third passage Installed wet cooling means for cooling the air flowing through the third passage, a wind discharge port formed in communication with the third passage and for discharging air upward, the first passage, 2 and a fan for introducing air flowing through the third passage. And wherein the Rukoto.
[0012]
According to such an invention, the air in the room is agitated by the cool air descending with the warm air due to the downflow effect, so it becomes possible to alleviate the temperature unevenness in the room by agitating the air without a feeling of strangeness. .
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described more specifically with reference to the drawings. Here, in the accompanying drawings, the same reference numerals are given to the same members, and duplicate descriptions are omitted. The embodiment of the invention is a particularly useful embodiment in which the present invention is implemented, and the present invention is not limited to the embodiment.
[0014]
(Embodiment 1)
1 is a schematic diagram showing a fan heater according to Embodiment 1 of the present invention, FIG. 2 is an explanatory diagram showing a downflow effect by the fan heater of FIG. 1, and FIG. 3 is a temperature of a room heated by the fan heater of FIG. FIG. 4 is a graph showing the relationship between the room temperature and the fan heater combustion amount of the fan heater of FIG. 1 in comparison with that of the conventional fan heater, and FIG. 5 is a modification of the first embodiment of the present invention. It is the schematic which shows the fan heater as.
[0015]
A fan heater 10 according to the present embodiment shown in FIG. 1 uses gas, petroleum, or the like as a combustion body. In the present invention, as the combustor, other than gas and petroleum may be applied.
[0016]
Inside the casing 11 of the fan heater 10, a combustion device 12 that performs combustion by the above-described combustion body is installed, and a first passage 13 through which combustion air flows is formed. The combustion device 12 is installed in the first passage 13, and the combustion air is heated by the combustion device 12. Further, a second passage 14 through which mixing air mixed with combustion air heated by the combustion device 12 flows so as to merge with the first passage 13 at a position downstream of the combustion device 12 in the flow direction. Is formed. The front surface of the casing 11 communicates with the first passage 13 and the second passage 14 that merge with each other, and the warm air A1 formed by mixing combustion air and mixing air is directed forward. A hot air discharge port 15 for discharging is formed.
[0017]
Further, a third passage 16 through which the cold air A2 flows is formed in the casing 11. A cold air discharge port (wind discharge port) 17 that communicates with the third passage 16 and discharges the cold air A2 upward is formed on the upper surface of the casing 11.
[0018]
Note that the hot air discharge port 15 is not necessarily formed on the front surface of the casing 11 as long as the hot air A1 can be discharged forward. Similarly, the cold air discharge port 17 is not necessarily formed on the upper surface of the casing 11 as long as it can discharge the cold air A2 upward. Further, the discharge direction of the cold air A2 from the cold air discharge port 17 may be directly above or obliquely upward.
[0019]
Here, in order to make the downflow effect described later more effective, the cold air A2 flows through the third passage 16 as in the present embodiment, and the cold air A2 is discharged from the cold air discharge port 17. It is desirable to do so. However, in the present invention, it is not always necessary for the third passage 16 to flow through the cold air A2, that is, cold air, as long as it is air having a predetermined temperature introduced from the periphery of the fan heater 10 or outdoors. Therefore, it is not always necessary that the cold air A2 is discharged from the cold air discharge port 17. In order to reliably discharge the cold air A <b> 2 from the cold air discharge port 17, it is conceivable to install, for example, a wet cooling means in the third passage 16.
[0020]
The fan heater 10 is provided with a fan 18 that introduces air flowing through the first passage 13, the second passage 14, and the third passage 16.
[0021]
As shown in the figure, the first passage 13, the second passage 14, and the third passage 16 are all connected to a common air supply passage 19, and a fan 18 is installed on the air supply passage 19. ing. Accordingly, the combustion air flowing through the first passage 13, the mixing air flowing through the second passage 14, and the cold air A <b> 2 flowing through the third passage 16 are collectively introduced by the fan 18.
[0022]
Next, agitation of room air by the fan heater 10 having the above configuration will be described.
[0023]
When the fan heater 10 starts the combustion operation, hot air A1 in which combustion air and mixing air are mixed is discharged from the hot air discharge port 15 toward the front. On the other hand, the cold air A2 is discharged from the cold air discharge port 17 upward.
[0024]
As a result, as shown in FIG. 2, the cool air is accumulated at the top of the room, and the warm air discharged by the hot air A1 discharged near the floor of the room rises due to the difference in specific gravity with the surrounding air. Reach right below.
[0025]
Then, the cool air at the top starts to descend due to the downflow effect with the warm air located immediately below it. When the cool air is continuously lowered with respect to the warm air, the room air is agitated and the temperature distribution is as shown in FIG.
[0026]
As can be seen from a comparison of FIG. 3 with FIG. 10 described above, the temperature unevenness is greatly reduced, and the living space is not easily heated.
[0027]
As described above, according to the fan heater 10 of the present embodiment, the air in the room is agitated not by increasing the convection speed of the room air but by lowering the cold air with warm air due to the downflow effect. Therefore, it becomes possible to alleviate the temperature unevenness of the room by stirring the air without feeling uncomfortable.
[0028]
Further, since it is not necessary to increase the amount of hot air A1 blown from the fan heater 10, the sound of the fan 18 does not increase and the amount of dust scattered by the hot air A1 does not increase.
[0029]
Thereby, a comfortable living space can be obtained.
[0030]
Furthermore, since it is not necessary to separately install an agitating means such as a circulator, construction for installing the agitating means and the cost thereof are not required. Further, since the agitation means is not required, it becomes possible to alleviate the temperature unevenness in any room where the fan heater 10 is arranged.
[0031]
Here, looking at the relationship between the room temperature and the fan heater combustion amount, as shown in FIG. 4, according to the fan heater 10 of the present embodiment indicated by the solid line, the temperature unevenness in the room is alleviated. Compared to the conventional fan heater shown, the room temperature quickly rises to the set temperature. As a result, the combustion amount of the fan heater 10 becomes small in a short time, that is, it shifts to the save operation in a short time, and it becomes possible to reduce the amount of use of gas, kerosene and the like.
[0032]
In the fan heater 10 described above, only one fan 18 is provided, and air flowing through the first passage 13, the second passage 14, and the third passage 16 is collectively introduced by the fan 18. However, as shown in FIG. 5, the two fans 18 of the first fan 18a and the second fan 18b are provided, and the combustion air flowing through the first passage 13 by the first fan 18a. The mixing air flowing through the second passage 14 and the cold air A2 flowing through the third passage 16 may be introduced by the second fan 18b.
[0033]
(Embodiment 2)
FIG. 6 is a schematic diagram showing a fan heater according to Embodiment 2 of the present invention.
[0034]
In the present embodiment, two fans 18 of a first fan 18a and a second fan 18b are provided, and the combustion air flowing through the first passage 13 and the second passage by the first fan 18a. 14 is introduced, and the second fan 18b introduces cold air A2 flowing through the third passage 16.
[0035]
Then, the first fan 18a and the second fan 18b are started so that the second fan 18b starts operation after a predetermined time (for example, after 5 minutes) when the first fan 18a starts operation and warm air stays upward. The operation of the fan 18b is linked.
[0036]
For a while after the fan heater 10 starts the combustion operation, warm air has not yet accumulated in the upper part of the room. If the cold air A2 is discharged upward from the cold air discharge port 17 in such a state, the cold air without the warm air descends due to the downflow effect, resulting in an uncomfortable feeling.
[0037]
Therefore, as in the present embodiment, the first fan 18a and the second fan 18b are provided so that the second fan 18b is dedicated to discharging the cool air A2, and the time until the warm air stays upward is the first time. If only the fan 18a is operated, and then the second fan 18b is started to discharge the cool air A2, the cool air accompanied by the warm air is lowered.
[0038]
Thereby, it becomes possible to alleviate the temperature unevenness of the room without causing a sense of incongruity of the downflow due to the descent of only cool air.
[0039]
(Embodiment 3)
FIG. 7 is a schematic view showing a fan heater according to Embodiment 3 of the present invention.
[0040]
Also in the present embodiment, two fans 18 of the first fan 18a and the second fan 18b are provided, and the combustion air flowing through the first passage 13 by the first fan 18a and the second fan 18a are provided. Mixing air flowing through the passage 14 is introduced, and cold air A2 flowing through the third passage 16 is introduced by the second fan 18b.
[0041]
A thermistor (temperature measuring means) 20 for measuring the temperature of the air introduced by the first fan 18a is provided on the air supply passage 19. Note that a temperature measurement unit other than the thermistor may be used.
[0042]
Then, the first fan 18a and the second fan 18b are started so that the second fan 18b starts operation after the first fan 18a starts operation and the temperature of the air by the thermistor 20 rises to a predetermined temperature. And the operation is linked.
[0043]
In a general fan heater, a thermistor or the like is attached to an air supply port, and control is performed to shift to a save operation when the supply air temperature rises and the difference from the set temperature becomes small.
[0044]
However, if the room air is not stirred and temperature unevenness occurs, it takes time for the supply air temperature, which is the temperature at the bottom of the room where the fan heater is installed, to reach the set temperature. It is uneconomical.
[0045]
When the supply air temperature reaches the set temperature and shifts to the save operation, the temperature of the upper part of the room is significantly higher than the set temperature.
[0046]
Therefore, as in the present embodiment, the first fan 18a and the second fan 18b are provided so that the second fan 18b is dedicated to discharging the cool air A2, and the temperature of the air by the thermistor 20 rises to a predetermined temperature. After that, if the second fan 18b starts operation and discharges the cold air A2, the room temperature is measured in a state where the air in the room is agitated and the temperature unevenness is alleviated, so the supply air temperature is set. Time to reach temperature is shortened.
[0047]
As a result, it is possible to promptly shift to a save operation, thereby becoming an economical device, and it is possible to quickly mitigate temperature unevenness in the room.
[0048]
The timing at which the second fan 18b starts operation is determined as follows.
[0049]
That is, the rising curve of the supply air temperature, which is the cold air A2, is detected by the thermistor 20, and is differentiated to obtain the slope at each time point. Since the rate of increase in the supply air temperature decreases with time, the differential value decreases with time. Therefore, when the differential value becomes equal to or less than a preset threshold value, this is regarded as a state in which the temperature unevenness of the room has increased, and the operation start timing of the second fan 18b is set.
[0050]
(Embodiment 4)
FIG. 8 is a schematic view showing a fan heater according to Embodiment 4 of the present invention.
[0051]
In addition to the fan heater 10 of FIG. 1 in the first embodiment described above, the fan heater 10 of the present embodiment has a predetermined temperature in which the fan 18 starts operation and warm air stays upward on the third passage 16. A valve 21 that opens the third passage 16 after a time (for example, after 5 minutes) is attached.
[0052]
According to such a fan heater 10, since the valve 21 is opened after the warm air stays upward and the cold air A2 is discharged from the cold air discharge port 17, as in the case of the already described Embodiment 2, It becomes possible to alleviate the temperature unevenness of the room without causing a sense of incongruity of the downflow due to the descent of only cold air.
[0053]
(Embodiment 5)
FIG. 9 is a schematic view showing a fan heater according to Embodiment 5 of the present invention.
[0054]
In the fan heater 10 of the present embodiment, in addition to the fan heater 10 of FIG. 1 in the first embodiment described above, the air introduced by the fan 18 has risen to a predetermined temperature on the third passage 16. A valve 21 that opens the third passage 16 after the thermistor (temperature measuring means) 20 has been detected is attached.
[0055]
According to such a fan heater 10, since the valve 21 is opened after the temperature of the cold air A2 by the thermistor 20 rises to a predetermined temperature and the cold air A2 is discharged from the cold air discharge port 17, the already described third embodiment. Similarly to the case shown in Fig. 5, the temperature of the cold air A2 supplied in a state where the air in the room is agitated and the temperature unevenness is alleviated is measured, and the time until the supply air temperature reaches the set temperature is shortened.
[0056]
As a result, it is possible to promptly shift to a save operation, thereby becoming an economical device, and it is possible to quickly mitigate temperature unevenness in the room.
[0057]
【The invention's effect】
As is apparent from the above description, the present invention can provide the following effects.
[0058]
(1). Rather than increasing the convection speed of the room air, the air in the room is agitated because the cool air descends with warm air due to the downflow effect, so the air is agitated without a sense of incongruity and the room temperature unevenness is alleviated It becomes possible.
[0059]
(2). Since there is no need to increase the amount of hot air blown from the fan heater, the sound of the fan does not increase and the amount of dust scattered by the hot air does not increase.
[0060]
(3). Since it is not necessary to separately install a stirring means such as a circulator, construction for installing the stirring means and the cost thereof are not required. Further, since the agitation means is not required, it becomes possible to alleviate the temperature unevenness in any room where the fan heater is arranged.
[0061]
(4). The room temperature quickly rises to the set temperature by alleviating the temperature unevenness in the room, so that it is possible to reduce the usage amount of gas, kerosene and the like by shifting to the save operation in a short time.
[0062]
(5). If the cool air is discharged after a predetermined time has elapsed since the fan started operation, the cool air accompanied by the warm air will be lowered, so that the temperature unevenness in the room can be reduced without causing an uncomfortable feeling of downflow due to the descending cold air alone. It can be mitigated.
[0063]
(6). If the cool air is discharged after the air has risen to the predetermined temperature, the temperature in a state where the temperature unevenness is reduced is measured, so the time until the supply air temperature reaches the set temperature is shortened and quickly. It becomes an economical device by shifting to the save operation, and it becomes possible to quickly mitigate the temperature unevenness of the room.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a fan heater according to a first embodiment of the present invention.
FIG. 2 is an explanatory diagram showing a downflow effect by the fan heater of FIG. 1;
3 is an explanatory diagram showing a temperature distribution in a room heated by the fan heater of FIG. 1. FIG.
4 is a graph showing the relationship between the room temperature and the fan heater combustion amount by the fan heater of FIG. 1 in comparison with that of a conventional fan heater. FIG.
FIG. 5 is a schematic diagram showing a fan heater as a modified example in the first embodiment of the present invention.
FIG. 6 is a schematic view showing a fan heater according to a second embodiment of the present invention.
FIG. 7 is a schematic diagram showing a fan heater according to a third embodiment of the present invention.
FIG. 8 is a schematic diagram showing a fan heater according to a fourth embodiment of the present invention.
FIG. 9 is a schematic view showing a fan heater according to a fifth embodiment of the present invention.
FIG. 10 is an explanatory diagram showing a temperature distribution in a room heated by a conventional fan heater.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Fan heater 11 Casing 12 Combustion device 13 1st channel | path 14 2nd channel | path 15 Hot air discharge port 16 3rd channel | path 17 Cold wind discharge port (wind discharge port)
18 fan 18a first fan 18b second fan 19 air supply passage 20 thermistor (temperature measuring means)
21 Valve A1 Hot air A2 Cold air

Claims (7)

A first passage in which a combustion device is installed and in which combustion air heated by the combustion device flows;
A second passage formed so as to merge with the first passage at a downstream position in the flow direction from the combustion device, and through which mixing air mixed with the combustion air heated by the combustion device flows;
A hot air discharge port that is formed in communication with the first passage and the second passage that merge with each other, and discharges hot air formed by mixing the combustion air and the mixing air toward the front. When,
A third passage through which air of a predetermined temperature flows;
A wet cooling means installed in the third passage for cooling the air flowing through the third passage;
A wind outlet that is formed in communication with the third passage and discharges the air upward;
A fan heater comprising: a fan for introducing air flowing through the first passage, the second passage, and the third passage.   The fan is composed of a single fan that collectively introduces the combustion air flowing through the first passage, the mixing air flowing through the second passage, and the air flowing through the third passage. The fan heater according to claim 1, wherein the fan heater is provided.   3. The fan heater according to claim 2, wherein a valve that opens the third passage after a predetermined time has elapsed since the fan started operation is mounted on the third passage.   3. The fan heater according to claim 2, wherein a valve that opens the third passage after the air introduced by the fan rises to a predetermined temperature is mounted on the third passage. .   The fan introduces a first fan that introduces the combustion air flowing through the first passage, a second air that introduces the mixing air that flows through the second passage, and the air that flows through the third passage. The fan heater according to claim 1, comprising: The fan introduces the first air that introduces the combustion air that flows through the first passage and the mixing air that flows through the second passage, and the second that introduces the air that flows through the third passage. Consists of fans and
The operations of the first fan and the second fan are linked so that the second fan starts operation after a predetermined time from the start of operation of the first fan. The fan heater according to claim 1. The fan introduces the first air that introduces the combustion air that flows through the first passage and the mixing air that flows through the second passage, and the second that introduces the air that flows through the third passage. Consists of fans and
Temperature measuring means for measuring the temperature of the air introduced into the apparatus is provided;
The first fan and the second fan so that the second fan starts operation after the first fan starts operation and the temperature of the air by the temperature measuring means rises to a predetermined temperature. 2. The fan heater according to claim 1, wherein the operation with the fan is interlocked.

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