JPS58127020A - Panel heater - Google Patents

Abstract

PURPOSE:To improve the heating performance of a vertical type panel heater by providing beltlike convection prohibiting members horizontally on the heat generating panel of the heater. CONSTITUTION:Four films 6 are provided between four pairs of support bars 5 which are disposed vertically with respect to the surface of the heat generating panel 3 which is formed only on one side of the heater. These films 6 constitute the convection preventing members, which reduce the heat loss due to the convection which substantially does not contribute to the heating performance of the panel heater, thereby increasing the ratio of discharged energy due to radiation to input.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a panel heater that is installed upright in a room and used for heating.

Generally, a panel heater has a structure in which a heat generating panel 2 is erected on legs 1 as shown in FIG.

Note that a heat generating element such as an electric heater is provided within the heat generating panel 2. Incidentally, this panel heater has the function of radiating long-wavelength infrared rays from a relatively low-temperature, large-area panel surface, and heating the room by natural convection heat transfer along the panel surface. Normal panel heaters transmit heat using radiant energy determined by the temperature, area, and emissivity of the panel surface, and natural convection energy determined by the temperature and area of the panel surface2.
7. −・ I am doing it. Regardless of the heat transfer method, the amount of heat generated indoors is the same, so it is thought that almost the same heating effect can be obtained after a long period of time.
There are large differences depending on the condition and purpose of the room. The first thing to consider is the speed at which the heating starts. Heat radiation reaches the human body without any time delay as the temperature of the panel surface increases, whereas convection does not reach the human body unless the temperature of the indoor air and walls rises. For this reason, if the ratio of convection is high, the heating effect will not be obtained unless it is constantly operated. The second possibility is the difference in temperature distribution. Since the distribution of thermal radiation is determined by the distribution of view factors defined by the shape and positional relationship between the panel surface and each part of the room, the radiation is strongest in the direction perpendicular to the panel surface. Therefore, the positional relationship can be adjusted to be optimal. On the other hand, since convection heat tends to concentrate near the ceiling, unnecessary parts are heated strongly, which is not only unpleasant as opposed to having a cold head and feet, but also a waste of energy. As mentioned above, radiation is the effective part of the panel heater, and convection can be said to be the ineffective part. From this point of view, some ideas have been made to construct the panel surface with a material whose emissivity and wavelength distribution have been carefully considered, but this alone is a failure because the absolute value of energy loss due to convection is the same.

In view of the above-mentioned points, an object of the present invention is to improve the heating capacity by radiating more infrared rays with less input. The basic configuration of the -l panel heater is that a band-shaped convection prevention member is provided horizontally on the surface.

Based on this configuration, heat radiation due to convection, which does not contribute much to heating capacity, is suppressed, radiation heat radiation relative to input is increased, and heating by the panel heater is made effective.

An embodiment of the present invention will be described based on FIG.

In Figure 1, 3 is heat generation on only one side, C Nenope 4 is leg,
Reference numeral 5 indicates four pairs of support rods provided perpendicularly to the surface of the heat generating panel 3, and four films 6 are provided between each pair of support rods 5.

As shown by the arrow in the figure, this structure is not much different from the conventional one shown in FIG. 2, but the natural convection is significantly changed by the presence of the film 5. In general, natural convection heat transfer is driven by an updraft determined by the relationship between the buoyancy and viscous force of the air, so it is necessary to cut off the updraft d'
It is natural that the value decreases. In fact, thin materials with low thermal conductivity, such as films, have a fin efficiency close to 0, so there is no reason for heat radiation to increase due to convection. Since the reduction in the natural convection heat transfer coefficient can be thought of as the reduction in heat radiation due to convection, even if the input is reduced by that amount, the surface temperature remains the same and the same radiant energy can be obtained. The larger the number of the anti-convection films 6, the better the effect, and the wider the width, the better. The width is 10 to 10, taking into account the thickness of the temperature boundary layer.
50 pancreas is necessary. In addition to film, cloth, paper, foamed resin, etc. can be used as the material, and depending on the situation, it is also possible to attach the panel directly to the surface of the panel without a support rod. Furthermore, there is also a method of providing a surface material such as a radiant material on the panel surface after forming the five vanes.

As explained above, the present invention provides a very effective means for reducing the heat dissipation due to convection, which does not contribute much to the heating capacity of the nozzle heater, and increasing the ratio of heat dissipation energy due to radiation to input. This brings out the best of the panel heater.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a panel heater according to an embodiment of the present invention, and FIG. 2 is a perspective view of a conventional panel heater. 3... Heat generating panel, 5... Support rod, 6
・・・−・轡・−・film〇Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 2

Claims (1)

[Claims] A panel heater comprising a band-shaped convection prevention member placed horizontally on the surface of an upright heating panel.