JPH036660Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a floating heater for preventing freezing near the liquid surface.

``Prior art'' One type of water storage tank is one that is buried underground in order to minimize the influence of outside air, but even in such a water tank, freezing near the liquid level in winter or in cold regions is avoided. I can't.

One example of such countermeasures is to introduce a heating element mainly composed of a sheathed heater into the aquarium to prevent freezing.Another example of such countermeasures is to place a floating heater with a heater on the underside of a hollow float inside the aquarium. There is a way to prevent freezing by floating it on the ground.

``Problems to be solved by the invention'' In the case of each of the above-mentioned means, it is possible to prevent freezing to a certain extent, but there are problems described below.

For example, in the case of antifreeze measures that use a heating element,
Since the entire inside of the tank is heated via the heating element at the bottom of the tank, a large-capacity heating element is required, which not only makes it impossible to efficiently heat only the vicinity of the liquid level, but also cannot respond to fluctuations in the liquid level.

On the other hand, in the case of freezing prevention means using floating heaters, the heater is held in the middle or upper layer of the water tank using the buoyancy of the hollow float, so it is possible to heat the area near the liquid surface more efficiently than in the previous example. Although it can respond to surface fluctuations, the upper hollow float is inevitably larger than the lower heater, and due to the large hollow float, the heater is submerged considerably below the liquid surface, and the heater position is moved away from near the liquid surface. Therefore, it becomes difficult to efficiently heat the area from below the liquid surface near the liquid surface to the liquid surface, and there is also the problem that the propagated heat is diffused in the depth direction.

Moreover, since the heater itself has a small surface area, such as a bobbin type or a ring type, it is not possible to heat a wide area near the liquid surface.If the heater is made larger to cope with this, a hollow float to match the size is also necessary. As a result, the overall size increases, resulting in uneconomical structure and inconvenience in handling.

In view of the above-mentioned problems, the present invention aims to provide a floating heater for preventing freezing that can efficiently and intensively heat only the vicinity of the liquid surface where freezing is likely to occur.

``Means for Solving the Problems'' In order to achieve the intended purpose, the floating heater for antifreeze according to the present invention has a lower float made of a plate and an upper plate-shaped heating element which is insulated. are interconnected by spacers to form these floats,
A flat open space is provided between the plate-shaped heating elements, and the float has buoyancy for holding the plate-shaped heating elements below the liquid surface near the liquid surface.

``Operation'' The anti-freeze floating heater according to the present invention uses the buoyancy of the float to hold a plate-shaped heating element below the liquid surface near the liquid surface, and uses the plate-shaped heating element to direct the liquid near the liquid surface. Concentrated heating is performed from below the surface to the liquid surface, thus preventing the liquid surface from freezing.

"Embodiments" Hereinafter, embodiments of the anti-freeze floating heater according to the present invention will be described with reference to the drawings.

In Figures 1 and 2, 1 is a plate-shaped heating element, 2
is a plate-shaped float, and 3 is a spacer.

The plate-shaped heating element 1 includes a thin sheet heating element 1a that can generate heat from both the upper and lower sides, a thin insulating material 1b made of plastic, for example, which protects the entire surface of the sheet heating element 1a in a watertight manner, and a sheet heating element 1a that can generate heat from both upper and lower surfaces. A thermostat 1c is attached to a part of the planar heating element 1a in order to maintain the heat generation temperature of the heating element 1a at a predetermined value.

The float 2 is composed of a float base material 2a made of foamed urethane with a low specific gravity, and a float exterior material 2b made of a plastic with a low specific gravity that covers the outer periphery of the float base material 2a.

In some cases, the float 2 may be composed only of polystyrene foam having a low specific gravity.

The plate-shaped heating element 1 and the float 2 described above are connected to each other via a spacer 3 in a relative arrangement in which the plate-shaped heating element 1 is on the upper side and the float 2 is on the lower side.
A flat open space is provided between the plate-shaped heating element 1 and the float 2.

In addition, the float 2 has buoyancy for holding the plate-shaped heating element 1 below the liquid surface S near the liquid surface when it is placed in the water tank in the mode of use described later.

In the figure, 4 is a cord connected to the planar heating element 1a.

In the anti-freezing floating heater according to the present invention, when the float 2 is placed in a water tank (not shown), the float 2 has a predetermined buoyancy. It is located below the surface S, and the float 2 is located below it in the liquid.

In such a state, when the plate-shaped heating element 1 is energized, the plate-shaped heating element 1, which generates heat from both the upper and lower surfaces, will generate heat from its upper surface to the liquid level S, and from its lower surface to the upper surface of the float 2 (in the open space). The float 2 prevents the heat from unnecessarily diffusing in the depth direction.

In this way, the area from near the liquid surface to the liquid surface S can be heated efficiently and concentrated, and freezing of the liquid surface S can be prevented.

[Effect of the invention] As explained above, in the anti-freeze floating heater according to the invention, the lower float having a predetermined buoyancy and the upper plate-shaped heating element are mutually connected to each other by a spacer with a flat open space interposed between them. is connected to.

Therefore, when the floating heater is placed in a liquid to be prevented from freezing, the lower float holds the upper plate-shaped heating element below the liquid surface near the liquid surface, and the plate-shaped heating element is kept close to the liquid surface. It prevents it from sinking deeply below, and
In such a state, the plate-shaped heating element that generates heat from its wide upper and lower surfaces heats a wide area from the upper surface of the float to the liquid surface along the liquid surface, and the float prevents unnecessary heat diffusion in the depth direction.

In this way, the area from near the liquid surface to the liquid surface is heated intensively, and the effect of preventing the liquid surface from freezing and the heating efficiency at that time are significantly improved.

In addition, since the floating heater has a flat structure, it is possible to make the structure more compact and to ensure stable followability to increases and decreases in the liquid level.

[Brief explanation of the drawing]

FIG. 1 is a cutaway perspective view showing an embodiment of the floating heater of the present invention, and FIG. 2 is an explanatory view showing the floating heater of the present invention in use. 1... Plate heating element, 1a... Planar heating element, 1b
... Insulating material, 2 ... Float, 2a ... Float base material, 2b ... Float exterior material, 3 ... Spacer, ... Open space, S ... Liquid level.

Claims (1)

[Scope of utility model registration request] A lower plate-shaped float and an upper plate-shaped heating element that has been insulated are connected to each other by a spacer, and a flat open space is provided between the float and the plate-shaped heating element, and the above-mentioned float is , a floating heater for freezing prevention having buoyancy for holding the plate-shaped heating element below the liquid surface near the liquid surface.