JPS5937642Y2 - foot warmer - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electric foot warmer that is used to heat the feet of a human body, which is placed under a study desk with a chairrest, while the user is seated facing the desk. .

Conventional foot warmers generally form a closed flat box-shaped container with a flat plate on the top surface, and a heating element for heating the plate is installed inside the container. The device is configured to heat the plate by energizing it, and to keep warm by placing your feet on the plate.

However, this type of foot warmer can only warm the soles of the feet that are in contact with the plate or the vicinity thereof; the lower limbs or knees benefit from the foot warmer, and are not heated by the heating element. Since the device is warmed only by radiant heat radiated from the heated plate portion, there are inconveniences such as the need for a warm-up time at the beginning of use.

Therefore, in order to be able to warm not only the toes but also the lower limbs or knees, a heating element is installed inside the foot warmer body, which is a flat box, and a blower fan is installed at one end of the body. , the air sucked into the foot warmer main body by the blower fan is heated by the heating element, and the heated warm air is sent toward the foot placed on the top plate of the foot warmer main body. A foot warmer has been proposed.

That is, FIG. 1 is a longitudinal sectional side view of the foot warmer,
A ventilation chamber 1a is formed protruding from the front edge of the foot warmer main body 1, which is a flat closed planar container, and extends along the front edge and communicates with the interior of the container. A blower fan 3 driven by a motor 2 is disposed inside the blower chamber 1a, and a plurality of intake ports 4 are provided on the side surface of the blower chamber 1a facing the rear end edge of the foot warmer main body. There is.

On the other hand, a heating element 7 is installed in the vicinity of the joint between the flat box-shaped foot warmer main body 1 formed from the top plate 5, the base 6, and the side plate portion, and the lower end of the ventilation chamber 1a. A temperature detector 8 is provided above the heating element 7 to control the temperature of the heating element, and a temperature sensor 8 is provided on the upper surface of the rear edge of the foot warmer main body 1 to blow hot air diagonally forward. A discharge port 9 is provided.

In the figure, reference numeral 10 is a mat with good air permeability and thermal conductivity laid on the top plate 5, and 11 is a leg that serves to prevent slipping on the floor when the foot warmer is in use.

When the fan motor 2 and the heating element 7 are energized, the blower fan 3 blows air from the intake port 4 into the foot warmer main body 1.
The air is inhaled into the air, heated by the heating element 7, and turned into warm air.
The hot air passes through the hot air passage formed by the top plate 5, the base 6, and the side plates, heats the top plate 5, and heads towards the discharge port 9 as shown by arrow C. The heating function is achieved by hitting the lower limbs or knees, and the air is sucked into the air intake port 4 again as shown by the arrow d.

In this case, the soles of the feet placed on the mat 10 are also warmed by the radiant heat (arrow e) radiated from the warmed top plate 5 via the mat 10.

On the other hand, if the fan motor 2 stops due to some kind of accident and the temperature inside the foot warmer main body 1 rises abnormally, the temperature is detected by the temperature detector 8 and the power supply to the heating element 7 is stopped.

However, in such devices, there is a considerable distance from the heating element installation part to the hot air outlet 1, so if the inlet or outlet is blocked by a foreign object, the temperature detector will detect an abnormal rise in temperature. Before the temperature is detected, the temperature in the hot air passage will rise and the temperature of the top plate and base will become high, which may cause burns or burn or discolor the tatami or carpet on the floor. There are inconveniences such as

In view of these points, the purpose of the present invention is to provide a foot warmer that can reliably detect abnormally high temperatures within the foot warmer body and reliably prevent the occurrence of scorching of the floor surface as described above. do.

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

Referring to FIG. 2, in which the same parts as in FIG. 1 are denoted by the same reference numerals, a first temperature detector 8 similar to the conventional one is provided above the heating element 7.

This first temperature detector 8 has a function of detecting the temperature of the heating element 7, and the temperature of the heating element 7 is controlled based on this detected temperature.

Further, a second temperature detector 12 is provided on the inner surface of the top plate 5 to detect the temperature in the hot air passage and to stop supplying electricity to the heating element 7 when the temperature reaches a predetermined temperature or higher. A second discharge port 13 for discharging a portion of the warm air diagonally backward is provided at the side of the ventilation chamber 1a of the top plate 5.
A rectifying plate 1 protruding in the direction of the heating element 7 is provided at the lower end of 3.
4 are provided.

When the fan motor 2 and the heating element 7 are energized, the air sucked into the foot warmer body 1 by the blower fan 3 is heated by the heating element 7 and becomes warm air. A portion is guided by the rectifying plate 14 to the second outlet 13 and is discharged diagonally backward from the outlet 13 to warm the front part of the foot placed on the top plate 5 of the foot warmer main body 1.

Further, the remainder of the hot air is discharged diagonally forward from the discharge port 9 through the hot air passage between the upper surface plate 5 and the base 6, and is
Heats the lower limbs or knees.

Then, both ridge exits 9 warmed the lower limbs as described above.
, 13 is sucked into the foot warmer main body 1 again through the intake port 4.

Therefore, if the temperature in the hot air passage rises abnormally due to some accident, for example, when the discharge port 9 is blocked,
The second temperature detector 12 detects the temperature rise, and the current supply to the heating element γ is stopped, thereby preventing the top plate 5, the base 6, etc. from overheating.

In addition, if the motor stalls, the first temperature detector 8 located above the heating element 7 is activated to stop energizing the heating element, thereby preventing an abnormal temperature rise in that part. .

Since the present invention is configured as described above, the radiant heat radiated from the top plate through the mat warms the soles of the feet placed on the mat, and the warm air discharged from the outlet warms the instep and lower limbs. Furthermore, not only can the knees be heated, but in the event that the temperature of the hot air passage reaches a predetermined temperature or higher due to blockage of the outlet, etc., a temperature detector installed in the hot air passage will generate heat. This provides effects such as being able to reliably prevent overheating of the top plate or base, and reliably preventing scorching or discoloration of the floor surface.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view of a conventional foot warmer, and FIG. 2 is a longitudinal side view of the foot warmer of the present invention. 1... Foot warmer body, 1a... Ventilation chamber, 2... Motor, 3... Fan, 4... Intake port, 5... Top plate,
6... Base, 7... Heating element, 8... First temperature detector, 9... Discharge port, 12... Second temperature detector,
14... Rectifier plate.

Claims (1)

[Scope of utility model registration request] A foot warmer body consisting of a flat container has a protruding ventilation chamber extending along the edge thereof and communicating with the container, and a motor is provided in the ventilation chamber and is driven by the motor. In addition to disposing a ventilation fan, a heating element is built into the foot warmer main body near the ventilation chamber, and hot air heated by the heating element is passed through the hot air passage of the foot warmer main body to the other end. In a foot warmer configured to discharge air diagonally upward from the foot warmer, a first temperature detector for detecting an abnormal temperature rise due to a fan stoppage accident is provided near the heating element, and a hot air passage in the foot warmer body is provided. A foot warmer characterized in that a second temperature detector for detecting an abnormal temperature rise due to blockage of the warm air passage is provided inside the foot warmer, and the operation of the heating element is controlled by both temperature detectors.