JPH01184340A - Method and device for temperature control for radiant heater/cooler - Google Patents

Abstract

PURPOSE:To maintain a uniform panel temperature distribution of a radiant heater/cooler by increasingly making the heat releasing area of heat releasing fins larger in the flow direction of air blown by a fan through the heat exchanging fins which are respectively provided to thermoelectric element. CONSTITUTION:Heat exchanging fins 7-1, 7-2, 7-3, 7-4 are fixedly attached from the suction outlet 11 of a first cross-flow fan 8 via a panel 5b toward the heat exchanging air outlet 14 relative to a thermoelectric element 6. The widths L1, L2, L3, L4 of the heat exchanging fins 7-1, 7-2, 7-3, 7-4 are in the order of L1<L2<L3<L4 from the first cross-flow fan toward the heat exchanging air outlet 14. Since the width of the heat exchanging fins 7-1, 7-2, 7-3, 7-4 lined in the direction of air flow are made increasingly larger from the first cross-flow fan 8 toward the heat exchanging air outlet 14 in this constitution so as to enlarge the generating surface of the heat exchanging fins, the fin performance becomes uniform. Since the panel temperature thus becomes uniform, the difference caused by different body heights or sitting locations can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a radiant air conditioner used in the field of air conditioners and office furniture.

(Prior Art) As a conventional radiant air conditioner, nine of the present inventors have proposed those shown in FIGS. 6 and 7. 6 and 7, reference numeral 1 in the figure is a partition plate, and this partition plate 1 consists of a frame 2 with an open upper end, and a front panel 3 and a rear panel 4 that close the front and rear surfaces of this frame 1. . A part 1 of the front panel 3, for example, the upper half, has a cutout hole, and a radiation heat absorption/dissipation part 5 is attached to this cutout hole. This radiation heat absorption/dissipation section 5 includes two panels 5a made of a material with high thermal conductivity such as an aluminum plate,
5b, a large number of thermoelectric elements 6 pasted and arranged between both panels 5a, 5b, and heat exchange fins 7 attached to the outer surface of the back panel 5b. Heat exchange fins 7 facing the front side of the partition plate 1 and on the back side are housed and attached within the partition plate 1. The heat exchange fins 7 exchange heat by the wind flowing vertically inside the partition plate 1.

The air flow path in each fin is oriented in the vertical direction.

Below the radiation cooling/heating plate 5, a first cross flow fan 8 and a second cross flow fan 9 are mounted inside the partition plate l with vertically shifted positions. The blowing force of the second cross flow fan 9 is weakened so that a slight breeze is blown out.

The suction port 10 of the first cross flow fan 8 is opened in the rear panel 4 of the partition plate 1.

Further, the air outlet 11 is provided upwardly within the partition plate 1. On the other hand, the inlet 12 and the outlet 13 of the cross flow fan 9 are both opened in the front panel 3, with their positions shifted vertically so that the inlet 12 is on the upper side and the outlet 13 is on the lower side. A heat exchange air outlet 14 is opened at the upper end of the partition plate 1, and the air from the air outlet 11 of the first cross flow fan 8 passes between the heat exchange fins 7 of the radiation cooling/heating plate 5 and is blown out from here. It is now possible to do so. 15 is a controller installed in the lower part of the partition plate 1, and this controller 15 controls the above-mentioned first.
The ON/OFF state of the second cross flow fans 8, 9, the ON/OFF state of energization to the thermoelectric element 6, the forward/reverse direction of energization, and the intensity thereof are controlled.

(Problem to be Solved by the Invention) Therefore, if heat exchange fins of the same size (dimensions LXHXB in Fig. 6) are installed on all the plurality of thermoelectric elements, the panels 5 on the thermoelectric element radiation side aligned in the direction of air flow The temperature distribution becomes non-uniform as shown in FIG.

This is because the air blows away heat from the heat exchange fins on the fan side (air inlet side), and the heated air exchanges heat with the next heat exchange fin, so the performance deteriorates as it moves toward the air outlet side, causing the panel to This is because the temperature no longer drops. This temperature unevenness causes differences in the radiation effect depending on the position in front of the panel, and there is a drawback that the temperature varies depending on the height of the person and where the person is sitting.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to maintain a substantially constant temperature distribution in a panel of a radiant air conditioner.

(Means and Effects for Solving the Problems) For this purpose, the present invention provides a radiation heat absorbing/dissipating section in which a plurality of thermoelectric elements are attached to the back side of the panel and heat exchange fins are provided to exchange heat from the thermoelectric elements. In a radiant air conditioner, the panel is installed on the front side of the partition plate and the heat exchange fins are placed inside the partition plate, and the heat exchange fins are blown by a fan to cause the panel to absorb and release heat.The temperature distribution of the panel is In order to make the temperature almost uniform, the heat transfer area of the heat exchange fins is gradually increased according to the flow direction of the fan air flowing through the heat exchange fins provided for each thermoelectric element.

For this reason, the width, height, or number of heat exchange fins are made wider on the heat radiation outlet side than on the fan side (air inlet side).

Therefore, even if the air flowing through the heat exchange fins gradually warms up, since the heat transfer area is enlarged, substantially uniform heat exchange can be performed, and the temperature distribution of the panel can be made substantially uniform.

(Example) The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 is a longitudinal sectional side view showing a first embodiment of the present invention.

FIG. 2 is a front view of a heat exchange fin showing a first embodiment of the present invention. Incidentally, in this embodiment, the same constituent members as those of the above-mentioned conventional example are given the same symbols, and the explanation thereof will be omitted.

Each heat exchange fin 1-+, 1-t, 1-s, 1-a is connected from the suction port 11 of the first cross flow fan 8 toward the heat exchange air outlet 14 through the panel 5b, corresponding to the thermoelectric element 6. ,
It is permanently installed.

The width of each heat exchange fin 1-+, 7-z, 7-3.7-,
, Lt, L, ,L gradually become Ll<t, ,<Lm<Lm from the first crossflow fan toward the heat exchange air outlet 14.
The width is .

In the above configuration, each of the heat exchange fins 1-+, 7-g, 7-*, and 1-a arranged in the flow direction of the air is made wider as it goes from the first cross flow fan 8 toward the heat exchange air outlet 14. Since the heat transfer area of the heat exchange fins is increased, the performance of the fins becomes uniform, so the temperature of the panel can be made almost uniform as shown in FIG.

Next, a second embodiment shown in FIGS. 4(a) and 4(b) will be described. Heat exchange fins 1-+, 1-z, ? -3゜7-4
The width is the same and the height H1H□Hs, Ha is gradually increased to H+
< Hz < Hs < Ha.

Next, a third embodiment shown in FIG. 5 will be described. Change the number of heat exchange fins and insert them from the fan side.
n! + n 3 + n 4 gradually n 1 <
The number is increased as n t < n s < n4.

Next, a fourth embodiment shown in FIG. 6 will be described. By arranging the heat exchange fins 1-+, 7-*, 7-s, and 1-a in a staggered manner, and attaching a partition wall 16 to each heat exchange fin 7-t, 7-t, and 7-s. -7-4
A uniform amount of fresh cooling air flows through the radiator, making the temperature of the radiant plate surface uniform.

Note that the width (B) of the heat exchange fins may be changed without being limited to the above embodiment, and raising and lowering may be combined.

Also, when gradually increasing the heat transfer area 1, for example, the width is t,
,<t,,<1. , < Lm, but L + =
Needless to say, it may be changed such that L t <L s = La.

(Effects of the Invention) As described above, in the present invention, by changing the heat transfer area of the heat exchange fins of the radiant air conditioner according to the flow direction of the air, the temperature of the panel can be made uniform. This has the excellent effect of eliminating differences depending on where you sit and creating a more comfortable workstation environment.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view showing the first embodiment of the present invention, FIG. 2 is a plan view of a heat exchange fin showing the first embodiment of the present invention, and FIG. 3 is the temperature distribution on the surface of the panel of the present invention. 4(a), 5th and 6 are plan views of heat exchange fins showing other embodiments of the present invention, and FIG. 7 is a plan view of a conventional embodiment. 8 is a longitudinal sectional side view showing a conventional embodiment, and FIG. 9 is a diagram showing the temperature distribution of the panel in the conventional embodiment. l... Partition plate 5... Radiation heating and cooling board 5a
, 5b... Panel 6... Thermoelectric element? , Lt.
, 1-t, 7-s, 1-a... heat exchange fin 8.
...First cross flow fan 11...Air outlet 14...Heat exchange air outlet Patent applicant Komatsu Ltd. Representative (patent attorney) Oka 1) Kazuyoshi Figure 1 Figure 2 Figure 3 Figure 5 Figure 7 Figure 8

Claims (1)

[Claims] 1. A radiant heat absorbing/dissipating section in which a plurality of thermoelectric elements are attached to the back side of the panel and heat exchange fins are provided on the other side of the thermoelectric element, and the panel is attached to the front side of the partition plate. In radiant air conditioners, in which exchange fins are installed inside the partition plate and a fan blows air through the heat exchange fins to cause the panel to absorb and dissipate heat, each thermoelectric element is 1. A temperature control method for a radiation cooling/heating machine, characterized in that the heat radiation area of a radiation fin is gradually increased according to the flow direction of air from a fan flowing through heat exchange fins provided in the radiant air conditioner. 2. A partition plate that has multiple thermoelectric elements attached to the back side of the panel, heat exchange fins that exchange heat from the thermoelectric elements, and a blower fan that cools the heat exchange fins, and that separates the heat exchange fins and the blower fan. A temperature control device for a radiant air-conditioning/heating machine, characterized in that the width, height, or number of heat exchange fins is larger on the air outlet side than on the fan side (air inlet side) in the radiant air-conditioning/heating machine installed inside the radiant air-conditioning/cooling machine.