JPH0914755A - Electric heater - Google Patents

Abstract

PURPOSE: To prevent drop in the temperature of hot air by blocking the hot air with a hot air heater from flowing into the side of a heat storage part. CONSTITUTION: A branch path 15 is provided with a heat storage material 13 in an air path 4 having a hot air heater 8 and a first damper 16 is provided on the inflow side positioned windward from the hot air heater of the branch path while a second damper 20 is provided on the outflow side positioned leeway from the hot air heater. The first and second dampers are operated in linkage to open or close on the inflow side and on the outflow side simultaneously and blocks the hot air from flowing into the branch path thereby preventing drop in the temperature of the hot air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric heater utilizing heat dissipation of a heat storage material.

[0002]

2. Description of the Related Art An electric warm air stove which applies intake air to a heater and converts it into warm air and discharges it has been commercialized for a long time. The limit is 0.0 KW to 1.5 KW.

Such power consumption has a drawback that the amount of heat is insufficient when the outside air temperature is extremely low such as in the middle of winter or when it is desired to obtain warmth in a short time.

To solve this problem, the heat storage material is heated to bring it into a heat storage state when warming is not required, and when warming is required, most of the inhaled air is converted into warm air through a normal heater. It has been proposed that a part of the air is passed through the heat storage material to radiate heat, and this heat radiation is combined with the warm air to obtain a large amount of heat in the initial stage of operation.

As prior art as described above, Japanese Patent Laid-Open No. 6-30
Japanese Patent Publication No. 0361 is exemplified. In this prior art, as shown in FIG. 1, an inflow port (35) for guiding the air sent from the blower fan (26) to the heat storage material side and a damper mechanism (37) for opening and closing this inflow port are provided.

When warm air is obtained only by the heater (28), the inlet is closed by the damper mechanism, and when warm air by the heat storage material and warm air by the heater is obtained, the damper mechanism is moved to open the inlet. The air sent from the blower fan is guided to the heat storage material side and the heater side and mixed and discharged at the air outlet (23).

[0007]

However, in the above-mentioned structure, when the warm air is obtained only by the heater, the warm air converted through the heater flows backward from the outlet to the flow path on the heat storage material side. There is a drawback that a sufficient amount of warm air cannot be obtained.

Further, when warm air is obtained only by the heater and the amount of blown air is increased, the draft effect also draws in the air in the flow path on the side of the heat storage material to lower the temperature and set it. There was a drawback that the wind temperature could not be obtained.

The present invention prevents the warm air, which has been heat-exchanged by the warm air heater, from flowing into the heat storage section side to suppress the temperature drop of the warm air.

[0010]

According to the present invention, there is provided a box body having an intake port and a discharge port and forming a ventilation path communicating the discharge port and the intake port, and a blower fan provided in the ventilation path. In the branch passage, a warm air heater provided in the ventilation passage, a branch passage branching from the ventilation passage on the windward side of the warm air heater and merging with the ventilation passage on the leeward side of the warm air heater. And a first damper provided on the inflow side of the branch passage located on the windward side of the warm air heater, and on the leeward side of the warm air heater. A second damper is provided on the outflow side of the branch passage, and the first damper and the second damper are interlocked to simultaneously open or close the inflow side and the outflow side of the branch passage.

Further, a heat sensitive member for detecting the temperature of the heat storage material is provided, and the heat sensitive member is linked to the first and second dampers.

[0012]

In a ventilation passage in which a warm air heater is disposed, a branch passage in which a heat storage material is disposed is provided. The branch passage has an inflow side located in the ventilation passage on the windward side of the warm air heater and a warm air heater. And an outflow side located on the leeward side, a first damper is provided on the inflow side, and a second damper is provided on the outflow side so that the inflow side and the outflow side are simultaneously opened by interlocking the respective dampers. When the heat radiation of the heat storage material is used, the first and second dampers open the inflow side and the outflow side to discharge high temperature air, and only the warm air heater that does not use the heat radiation of the heat storage material is closed. First to get warm air,
The second damper blocks the inflow side and the outflow side to prevent warm air from entering the branch passage from the outflow side.

The present invention improves on the above-mentioned drawbacks and will be described below with reference to the drawings.

FIG. 1 is a side sectional view of an electric heater according to the present invention,
FIG. 2 is a perspective view of the same main part, FIG. 3 is a side view showing a closed state of the inflow side and outflow side of the branch passage by the first and second dampers, and FIG. 4 is an open state of the first and second dampers. It is a side view shown.

(1) is a box body having an intake port (2) on the rear surface and a discharge port (3) provided on the lower part of the front surface, and is an L-shape that connects the discharge port (3) and the intake port (2). Forming a ventilation path (4). (5) is a blower fan provided on the intake side in the ventilation passage (4), (6) is a motor for rotationally driving the blower fan (5), and (7) is for the intake port (2). It is the arranged filter.

Reference numeral (8) is a warm air heater comprising a thermistor provided in the horizontal portion of the ventilation passage (4), and reference numeral (9) is a discharge grill provided at the discharge port (3).

Reference numeral (10) is a heat storage section disposed above the horizontal portion of the ventilation passage (4) and directly above the warm air heater (8), and is located in the storage case (11) and the storage case. It has a heat storage material (13) and a heater (14) for the heat storage material (13), which is made of magnesia bricks, as well as the arranged heat insulation material (12), and between the heat insulation material (12) and the heat storage material (13). A branch passage (15) is provided in the.

The branch passage (15) is provided with an inlet (16) branching from a ventilation passage (4) on the windward side of the warm air heater (8) on the bottom wall of the storage case (11), An outlet (17) formed so as to join the ventilation passage (4) is provided on the leeward side of the warm air heater (8).

Reference numeral (18) is a first damper provided on the inlet (16) side of the warm air heater (8) on the windward side.
A shaft support (19) is provided on the leeward side.

Reference numeral (20) is a second damper provided on the side of the outlet (17) which is on the leeward side of the warm air heater (8).
Partly bent horizontally to form the wind guide vane (21),
A shaft support (22) is provided on the windward side.

The drive mechanism (23) for the first damper (18) and the second damper (20) will be described. (See FIGS. 2 and 3) (24) is a mounting plate attached to the side of the storage case (11), (25) is a reduction motor fixed to the mounting plate (24), and the rotary shaft (26) is It is fixed to the other side of the actuator (28) having a protrusion (27) formed on one side by a support shaft (29) at a distance from the rotary shaft. (30) is a support plate in which one side is fixed to the mounting plate (24) and a pair of guide pieces (31) (31) are bent and formed on the other side at a predetermined interval.
Reference numeral (32) is a sliding plate arranged between the guide pieces (31) and (31), and a pair of guide holes (33) and (33) are formed in the upper portion to form a V-shape. Reference numeral (34) is a swing plate which connects the support shaft (35) of the sliding plate (32) and the support shaft (29) of the actuator (28), and (36) and (37) are illustrated in detail. Although not provided, the transmission rods are pivotally supported on both sides and the respective end portions are inserted into the guide holes (33) (33), and one transmission rod (36) has the first damper (1).
8) is fixed, and the second damper (20) is fixed to the other transmission rod (37). Reference numeral (38) is a mounting substrate fixed to the lower portion of the mounting plate (24), and a stop switch (39) for the reduction motor (25) is provided on the upper surface.

Reference numeral (40) is a heat-sensitive member which penetrates the heat insulating material (12) and is provided in the vicinity of the heat storage material (13). When the temperature of the heat storage material (13) reaches about 400 degrees, a control circuit is provided. The deceleration motor (25) is driven by the output (not shown) to simultaneously operate the first and second dampers (18) and (20) to open the inflow port (16) and the outflow port (17). ,
When the temperature of the heat storage material (13) is reduced to about 50 degrees, the first and second dampers are used to introduce the inlet (16) and the outlet (1).
7) is closed at the same time.

Next, the operation will be described. In advance, when the heater body is not in use at night, etc., the heater (1
4) is energized to heat the heat storage material (13) to bring it into a heat storage state.

When the warm air heater (8) and the motor (6) were energized the next morning when the room temperature was the lowest, air was taken in through the intake port (2) as the blower fan (5) rotated. The air passes through the ventilation passage (4), undergoes heat exchange by the warm air heater (8), and is discharged from the discharge port (3).

On the other hand, since the heat storage material (13) is sufficiently stored at night as described above, the temperature thereof reaches 400 degrees or more. As a result, the heat-sensitive member (4
0) is input to a control circuit (not shown) at the same time when the hot air heater (8) is energized, and the control circuit outputs the deceleration motor (2).
5), the operator (28) is rotated, and the rocking plate (34) is moved upward to raise the sliding plate (32).

The sliding plate (32) is a guide piece (31).
The guide rod is guided by (31) and ascends, and the end portions of the respective transmission rods (36), (37) are pushed up along the inclination of the guide holes (33), (33) along with the ascent, and thus the transmission rods. (36) and (37) rotate and the first and second dampers (18) and (20) move downward. Actuator (2
8) rotates to a predetermined angle, and the protrusion (27) presses the stop switch (39) to stop the drive of the deceleration motor (25) through the control circuit to stop the first and second dampers (1).
8) and (20) are in the state shown in FIG.

Therefore, a part of the air flowing through the ventilation passage (4) is guided by the first damper (18) and enters the branch passage (15) to transfer the heat of the heat storage material (13) to the outlet (17).
Is guided by the second damper (20) to join the warm air in the ventilation passage (4) and discharges hot air from the discharge port (3).

When the temperature of the heat storage material (13) drops to about 50 degrees, the deceleration motor (25) drives and the slide plate (32) descends regardless of the pressing state of the stop switch (39). The ends of the transmission rods (36) and (37) are guided by the guide holes (3
3) and (33), and the first and second dampers (18) and (20) move to close the inlet (16) and the outlet (17), respectively. Become.

In the present invention, the first and second dampers have been described to open or close the inlet and the outlet in the hot air discharge state, but there are a plurality of steps between the opening and the closing. It can also have a position.

[0030]

As described above, according to the present invention, the inflow side and the outflow side of the branch passage are simultaneously opened or closed by interlocking the first and second dampers. When used, it can be mixed with hot air from the hot air heater and discharged, and when hot air is discharged from the hot air heater, it prevents hot air from entering the branch passage from the outflow side. Thus, it is possible to prevent the temperature of the warm air from decreasing.

Further, since the temperature of the heat storage material is detected by the heat sensitive member and the first and second dampers are linked,
The drive sources of the first damper and the second damper are the same so that there is no time delay, and the first damper and the second damper can drive the respective dampers at the time necessary for driving them according to the temperature of the heat storage material.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an electric heater according to the present invention.

FIG. 2 is a perspective view of an essential part of the same.

FIG. 3 is a side view showing a closed state of the inflow side and the outflow side of the branch passage by the first and second dampers.

FIG. 4 is a side view showing an opened state of the first and second dampers.

[Explanation of symbols]

 1 Box 2 Intake port 3 Discharge port 4 Ventilation path 5 Blower fan 8 Hot air heater 13 Heat storage material 15 Branch passage 16 Inlet 17 Outlet 18 First damper 20 Second damper 40 Heat-sensitive member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Endo 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Santoyo Sanyo Denki Co., Ltd. Incorporated (72) Inventor Shunichi Nakajima 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd.

Claims (2)

[Claims] 1. A box body having an intake port and a discharge port and forming an air passage communicating with the discharge port and the intake port, a blower fan provided in the air passage, and a temperature provided in the air passage. A wind heater, a branch passage branched from an air passage on the windward side of the warm air heater, and joined to the air passage on the leeward side of the warm air heater, and heated by a heater provided in the branch passage. A heat storage material, a first damper provided on the inflow side of the branch passage located on the windward side of the warm air heater, and a first damper provided on the outflow side of the branch passage located on the leeward side of the warm air heater. An electric heater comprising: two dampers, wherein the first damper and the second damper are interlocked to simultaneously open or close the inflow side and the outflow side of the branch passage. 2. The electric heater according to claim 1, further comprising a heat sensitive member for detecting the temperature of the heat storage material, wherein the heat sensitive member is linked to the first and second dampers.