JPH0781742B2 - Air purifying electric warmer - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying electric blower provided with a dust filter on the intake side of a blower section and a heating element on the blow side.

2. Description of the Related Art In recent years, there has been an increasing demand for cleaning indoor air that is related to health, such as sidestream smoke from cigarettes, hay fever, and atopic constitution of children. More and more attention has been paid to the removal of pollutants to contaminate plants. Against this background, an air purifying warm air blower, which has an electric heater that does not pollute the indoor air and a function that actively purifies the indoor air, is used.

This type of air-purifying electric warmer is provided with a lattice-shaped intake port 102 on the front surface of a main body 101, and immediately after that, a dust removal filter 1
03 is attached, and the air blower 104 is provided behind it. The blower unit 104 includes a motor 105, a fan 106, and a spiral casing 107.
Is made up of. A heating element 108 is provided on the discharge side of the blower unit 104, where the clean air is heated and discharged as warm air into the room.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above conventional configuration, the electrical connection portion 108a to the heating element 108 is the electrical connection portion 108a to the heating element 108.
However, there is a problem in that the temperature rises due to heat dissipation and heat transfer from the heat generating element 108, oxidative deterioration and loosening of the connection are likely to occur, and the life of the connecting portion 108a is greatly reduced. Also,
The heat radiated from the periphery of the heating element 108 is gradually accumulated inside the main body case 101, and the ambient temperature of the connecting portion 108a rises along with it, and the temperature rise of the connecting portion 108a further increases due to the temperature rise of the connecting portion 108a itself. It had the problem of advancing.

The present invention is to solve the above-mentioned conventional problems, and cools the connection portion of the heating element terminal and removes heat radiation from the periphery of the heating element to reduce the temperature rise in the main body case, thereby increasing the temperature of the electrical connection portion. It is an object of the present invention to provide an air-purifying electric warmer that eliminates the risk of oxidation, loosening of connections, etc.

Means for Solving the Problems In order to achieve this object, an air purifying electric warmer of the present invention is a box-shaped main body case, an intake port provided on the front surface of the main body case, and Immediately after the dust removal filter and room air are taken in through the intake port,
A centrifugal fan and a vortex casing that are sucked by passing through the dust removal filter, a suction duct that communicates between the suction side of the vortex casing and the dust removal filter, and a heating element provided at the discharge port of the vortex casing,
It has a warm air outlet provided on the front surface of the main body for blowing out warm air from the heating element, a discharge opening opening near the discharge opening of the spiral casing, and a suction opening opening in a part of the suction duct. The airflow from the discharge opening is blown to the power supply terminal of the heating element and is further sucked from the suction opening.

Operation With this configuration, part of the wind flowing near the outer circumference of the spiral casing is sent to the power supply terminal of the heating element directly from the discharge opening provided in the spiral casing, and is formed in the suction duct. Since the discharged air is sucked and collected from the suction opening, the heat dissipated from the power supply terminal of the heating element and the heat duct is promptly removed from the inside of the main body case.

Embodiment One embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

As shown in the figure, the box-shaped main body case 1 has a built-in air blower composed of a centrifugal fan 4 and a spiral casing 6, and a lattice-shaped intake port 2 is provided on the front surface of the main body case 1, and immediately after that, a dust removal filter 3 Is set. A suction duct 5 is installed between the suction side of the spiral casing 6 and the filter 3 so as to keep airtightness. Spiral casing 6
The discharge side is connected to a heater duct 8 that surrounds the heating element 7, and the heater duct 8 is connected to a blowout port 9 below the front surface of the main body case 1. The power supply terminal portion 10 of the heating element 7 is located below the outer peripheral side of the spiral casing 6 and protrudes outside the heater duct 8. A discharge opening 11 is provided on the outer peripheral surface of the spiral casing 6 and is located near the power supply terminal 10. The discharge opening 11 is provided with a projecting piece 12 that is inclined inward, and has a shape in which a part of the amount of air blown from the discharge opening 11 easily flows out. Further, a suction opening 13 is provided on the lower surface of the suction duct 5 and is opened at a position where the airflow from the discharge opening 11 can be efficiently sucked.

The operation of the air-purifying electric warmer of this embodiment constructed as above will be described below.

First, when the operation is started, the centrifugal fan 4 is rotated, and the purified air is taken into the suction side of the spiral casing 6 through the intake port 2, the dust filter 3, and the suction duct 5.
The air sucked by the centrifugal fan 4 swirls along the spiral casing 6 from the discharge port side thereof to the heater duct 8
And is heated by the heating element 7 to become warm air and is discharged from the air outlet 9 into the room. At this time, the heat of the heating element 7 is
Most of the air is discharged from the outlet 9 as warm air, but the heater duct 8 is also heated at the same time.
Part of the heat is radiated into the main body case 1 through the wall surface of. On the other hand, the power supply terminal portion 10 of the heat generating element 7 may become high in temperature due to a temperature increase due to energization and a temperature increase due to heat transfer from the heat generating element 7.
The air flow that has flown out along the protruding piece 12 that protrudes inside the discharge opening 11 directly hits the power supply terminal portion 10 and exerts a cooling effect by blowing air, so that the temperature rise can be suppressed mildly. Further, the air discharged into the main body case 1 is sucked through the suction opening 13 of the suction duct 5. At this time, since the heat generation of the power supply terminal portion 10 and the heat radiation from the wall surface of the heater duct 8 are performed, the power supply terminal portion 10 can reduce oxidative deterioration due to high temperature, and can prevent the temperature rise in the main body case 1.

As described above, according to the present embodiment, the discharge opening is provided on the outer peripheral surface of the spiral casing, and the suction opening is further provided on the lower surface of the suction duct to directly blow air to the power supply terminal of the heating element to generate power from high temperature heat. By preventing the high temperature deterioration phenomenon of the terminals and at the same time quickly collecting the hot air that is dissipated into the main body case from the suction opening, the temperature inside the main body case can be lowered and the temperature rise of the power supply terminal itself can be suppressed. In addition, it is possible to surely suppress the temperature rise around it.

EFFECTS OF THE INVENTION The present invention provides a discharge opening on the outer peripheral surface of a spiral casing, and further provides a suction opening in the middle of the suction duct,
By blowing air directly from the discharge opening to the power supply terminal to cool it, and then sucking the heated air around the heating element from the suction opening, the temperature rise of the power supply terminal itself is reduced by the air blow, and at the same time from the discharge opening. The air blown to the power supply terminals is efficiently sucked into the suction opening, and even the heat dissipated into the main body case through the wall of the heater duct is also sucked, so that the hot air remaining in the main body case is quickly collected. Since the temperature of the power supply terminal itself and its surrounding temperature can be reliably suppressed, it is an excellent air-purifying electric temperature that can prevent oxidative deterioration and loosening of the connection due to abnormal temperature rise of the power supply terminal. It realizes a wind blower.

[Brief description of drawings]

FIG. 1 is a sectional view of an air purifying electric warmer in one embodiment of the present invention, FIG. 2 is a sectional view of the same casing, and FIG. 3 is a sectional view of a conventional air purifying electric warmer. 1 ... Main body case, 2 ... Intake port, 3 ... Dust removal filter, 4 ... Centrifugal fan, 5 ... Suction duct, 6 ... Swirl casing, 7 ... Heating element, 9 ... Blowout port, 10 ......
Power supply terminal, 11 …… Discharge opening, 13 …… Suction opening.

Claims (1)

[Claims] 1. A box-shaped main body case, an intake port provided on the front surface of the main body case, a dust removal filter installed behind the intake port, and room air taken in from the intake port to remove the dust. Fan and a spiral casing for passing through the filter for suction, a suction duct communicating between the suction side of the spiral casing and the dust removal filter, and a heating element provided in communication with the discharge port of the spiral casing. A hot air outlet provided on the front surface of the main body for blowing hot air from the heating element, a discharge opening opening near the discharge opening of the spiral casing, and a suction opening opening in a part of the suction duct. An air purifying electric warmer having an air flow from the discharge opening, which is blown to a power supply terminal of the heating element and further sucked from the suction opening.