JPS61211628A - Electric fan heater - Google Patents

Abstract

PURPOSE:To forcibly discharge steam from a discharge port in order to prevent the ascending air current, which is developed by the heat released from a heater, from influencing through a constitution wherein the opening area of the steam discharge port, which is provided at a location lower than the heater, is set within a specified range. CONSTITUTION:A steam discharge port 25 locates in the front of a main body at a location, which is lower than a heater unit 11 and higher than the full water level in a water tank 24. At the same time, the opening area of the steam discharge port 25 is determined by setting a small hole 25', which satisfies the formula of the opening area [cm<2>]/humidifying rate [ml/hr]=0.0005-0.01. When a power switch 16 is turned ON, a vertical type heater unit 11 is energized, resulting in radiating the heat generated by the heater unit forwards directly from the heater unit or after reflecting with a parabolic reflector 14. At the same time, the air sent by a fan motor 17 is heated while passing between a main body case 10 and the reflector 14 and exhausted as hot air from a blow-off port 19.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric fan heater with steam generation capability.

2. Description of the Related Art As shown in FIG. 3, a conventional electric fan heater of this type has a water tank 2 and a heating section 3 disposed in the upper part of a main body 1.
A discharge port 4 was provided on the top surface of the main body 1, and steam was discharged from this port.

Problems to be Solved by the Invention However, with such a structure, when the water tank 2 is full, the weight of the upper part of the main body 1 increases, and the hot water spills over the feet of the user who is warming himself or people around him. There was a risk of splashing and causing burns. Therefore, the inventors of the present invention have considered a configuration as shown in FIG. That is, a water tank 2' and a heating part 3' are arranged in the lower part of the main body 1', and a discharge port 6 is arranged in the front of the lower part of the main body.
, the above-mentioned problem is solved to a large extent. However, due to the rising air due to the natural convection of the steam and the rising air current d due to the heat generated by the heater 6, the discharged steam is drawn toward the main body 1' and There is a problem in that dew condensation occurs on the guard 7 and the reflector 8 provided on the front, and not only can the original humidifying effect not be expected, but also that there is a risk of rust forming in the dew condensed parts.

The present invention solves these problems and provides a steam generator that reduces the risk of burns caused by hot water when the main body falls over, and that allows effective humidification without condensation of discharged steam on guards or reflectors. The purpose is to

Means for Solving the Problem In order to solve this problem, the present invention provides a steam discharge port below the heater, and the opening area of the steam discharge port is calculated as: opening area (cJ)/steam generation capacity [d /H)=o,ooos
~0. With this configuration, the steam generated in the steam generator generates internal pressure because the discharge port is narrow, and this pressure difference is used to force steam from the discharge port. This prevents the influence of rising air currents caused by heat generation from the heater.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In Fig. 1, 1o is the main body case of the electric fan heater, which is a vertically cylindrical shape with an open front, and 11 is the main body case 1o.
An upper reflective support plate 12 and a lower reflective support plate 13 are installed at the front opening of the
The vertical heater unit 14 is held from both the upper and lower sides by a reflector whose cross section is parabolic with the focus at the center of the vertical heater unit 11, and an air flow path is formed between it and the rear wall of the main body case 10. It is provided to be formed.

Reference numeral 15 is a grid-like guard installed at the front opening of the main body case 1o to prevent large foreign matter from entering the vertical heater unit 11. Reference numeral 16 is a power switch installed on the top surface of the main case 1o for performing important operations. It is. 17 is main case 1
The fan motor installed at the bottom of the main body case 1 sucks air from the grid-shaped suction port 18 at the bottom of the back of the main body.
The air is heated as it passes between the angle and the reflecting plate 14, and is discharged as warm air from a grid-shaped air outlet 19 at the upper front of the main body. 2o is a stand with a large bottom area to support the main case 1o in order to increase the stability of the product. 21 is a heating pipe located at the bottom of the main body case 1°, and is made of a steel pipe insulated with mica and a heating wire wrapped around it from above, and is connected to the water tank 24 by joints 22° and 23 made of silicone rubber, etc. , and the steam discharge port 25 are watertightly connected. The water tank 24 has a water supply port 26 opened to the outside at its upper end.

In addition, the steam outlet 26 is connected to the heater unit 1 at the front of the main body.
1 and installed at a position higher than the full water level of the water tank 24, and the opening area of the steam outlet 26 is as follows: opening area [d]/humidification amount (*l/H)=O, 0O0
It is formed by two small holes with a relationship of 5-0,01.

Next, the operation of the configuration of this embodiment will be explained. First, when the power switch 16 is turned on, the vertical heater unit 1
1 is energized, and the heat emitted from it is radiated forward either directly or reflected by a parabolic reflector 14.

At the same time, the air sent by the fan motor 17 is heated while passing between the main body case 10 and the reflector plate 14, and is discharged from the air outlet 19 as warm air. Furthermore, when tap water is poured into the water tank 24 from the water supply port 26, the water boils in the heating pipe 21, turns into steam, and is discharged horizontally from the small hole 26' of the discharge port 26 at a speed. do.

At this time, a vertical heater unit 1 is placed around the discharge port 26.
Although there is an updraft due to natural convection due to the heat of step 1, the discharged steam can be discharged forward without riding the updraft a because its opening area is made small as shown in Figure 2. . In Figure 2, the vertical axis represents the horizontal reach of the discharged steam, and the horizontal axis represents the opening area of the discharge port, and the humidification amount per hour is 40 ml/H, Tome/H, 100 d.
/H was measured as an example.

Here, the smaller the opening area, the more the distance the discharged steam can reach in the horizontal direction, but if it is too small, the internal pressure in the discharge port 25 and the heating pipe 21 will increase, and at the same time, the heated steam will blow out. The amount of humidification is reduced due to flow resistance at the discharge port, and effective humidification is not performed.

From the above relationship, the opening area of the discharge port 25 is defined as the opening area [
d]/Calorie wet amount (ml/H) =O, OOO5~0
, 01, it is possible to prevent the discharged steam from condensing on the guard 15 and the reflecting plate 14 due to the rising air of natural convection caused by the heat generated by the vertical heater unit 11. It is.

Also, the steam discharge port 25 is connected to the small hole 25' according to the above relationship.
This prevents the boiling water inside the heating pipe 21 from flowing out all at once from the opening of the discharge port 25 when the main body falls over, further reducing the risk of burns, and at the same time preventing the boiling water inside the heating pipe 21 from flowing out all at once from the opening of the discharge port 25. It is possible to suppress the boiling sound from the opening.

Effects of the Invention As described above, according to the present invention, the steam discharge port on the outside of the main body is disposed below the heater, and the discharge port has an opening area (cJ
)/steam generation capacity (d/H) =O, OOO5~0.
01, it prevents the discharged steam from riding on the rising airflow caused by the heat of the heater and condensing on the guard or the reflector, allowing effective humidification and at the same time 1. Even if you accidentally fall over the main body case, it prevents boiling water from splashing over a wide area from the discharge port all at once on the floor, and there is very little risk of it splashing directly onto the person taking the warmth.During normal operation, there is no harsh boiling sound. However, it has various effects such as being able to suppress the sound from reverberating through the opening.

[Brief explanation of the drawing]

It is a sectional view of the conventional electric fan heater in each case of al/H, 70d/H, and 100yxl/H. 10... Body case, 11... Heater unit, 21... Heating pipe, 22.23.
...Joint, 24...Water tank, 2
6... Discharge port, 26... Water supply port. Name of agent: Patent attorney Toshio Nakao and 1 other person f1
---e-Geuni, TsuY 21-1-ri TJ Wandering J1゛4F1 1I 2 Fig.4

Claims (1)

[Scope of Claims] A main body case with an open front, a heater provided in the front opening of the main case, a steam generating section provided in the main case, and a steam generating unit in the main case below the heater. An electric fan having a steam discharge port provided in communication with the steam outlet, and the steam opening area is as follows: opening area [cm^2]/steam generation capacity (ml/H) = 0.0005 to 0.01. heater.