CN2748841Y

CN2748841Y - Heat pipe radiator for thermoelectric refrigeration devices

Info

Publication number: CN2748841Y
Application number: CN 200420084800
Authority: CN
Inventors: 齐媛; 齐悦
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-10
Filing date: 2004-08-10
Publication date: 2005-12-28
Anticipated expiration: 2014-08-10

Abstract

The utility model relates to a heat pipe radiator for thermoelectric refrigeration devices, which comprises an actuating medium box, a filling pipe, a lower end plate, a U-shaped brass pipe, an upper end plate and an aluminum foil fin. The crossing points of the two arms of the U-shaped brass pipe with the actuating medium box are respectively arranged on the upper part and the lower side part of the actuating medium box. The upper end plate and the lower end plate are respectively positioned on both sides of the top and the bottom of the radiator. The aluminum foil fin is arranged on the upper end plate. A thermoelectric refrigeration device is connected and equipped on the workpiece flank in the actuating medium box. Using the philosophy that the actuating medium in the actuating medium box is vaporized when absorbs heat, and is condensed when removes heat; the heat in the heat end of the thermoelectric refrigerator is dropped away quickly, and a larger refrigeration amount and coefficient of performance are generated in the cold end of the thermoelectric refrigerator. The utility model is used for semiconductor refrigerator, and the differential temperature of 27 DEG C can be obtained.

Description

A kind of thermoelectric refrigerator heat-pipe radiator

Technical field

The utility model relates to the thermoelectric (al) cooling field, particularly a kind of thermoelectric refrigerator heat-pipe radiator.

Background technology

Because have direct current to produce Joule heat by thermoelectric couple during the thermoelectric refrigerator operation, the temperature in hot junction also will be imported cold junction into simultaneously, so under thermal equilibrium state, the equation of heat balance of cold junction is:

Qc＝anp?Tc?I-0.5I ²R-K(Th-Tc)……(1)

Be that the refrigerating capacity of cold junction equals the Peltier cold that cold junction produces and deducts 1/2 Joule heat of bringing cold junction into, deduct again and import the heat of cold junction into by the hot junction by the decision of Fuli's leaf heat conduction law.Derived as can be known by formula (1), under the situation that does not change thermojunction material and heat exchange pattern, when cold and hot end reached maximum temperature difference, refrigerating capacity and refrigeration coefficient all leveled off to zero.This shows, improve refrigeration performance, remove and select suitable electric current and voltage, relatively reduce and bring into outside the Joule heat of cold junction, the more important thing is and improve the thermoelectric refrigerator heat exchange pattern, reduce the heat exchange that cold and hot end Yin Wendu accumulation forms, reduce the temperature difference of cold and hot end to greatest extent, could obtain refrigerating capacity and refrigeration coefficient preferably.The size of existing thermoelectric refrigerator own is less, 40 * 40mm or 50 * 50mm commonly used, and heat flow density is very big like this, if not really soon heat is passed rapidly, certainly will strengthen the temperature difference of cold and hot end, and influence the refrigerating capacity and the refrigeration coefficient of cold junction.Traditional aluminium section bar gilled radiator is replaced by the heat-pipe radiator of various types gradually.Current heat-pipe radiator commonly used is broadly divided into three types, (application number is 00100480.8 to the patent of first North China energy-saving investment Co., Ltd, 98101096.2 etc.) the so-called noiseless heat pipe of representative, we also can be separate heat pipe or screen type heat pipe, the maximum characteristics of this heat pipe are refrigerant vapor and working medium condensate liquid co-flow in same pipe, and thermal resistance is less.Its weak point, because of not having blower fan and employed material thermal conductivity very low steel pipe and steel wire, and in the working medium box with reason such as the hot working fluid exchange area is less, so its radiating effect is still not very good.Another kind is the patent (02292990.8 with Samsung Electronics (Suzhou) Co., Ltd., 02292989.4) heat pipe of representative, can use blower fan, also can be with the bigger material of thermal conductivity factors such as aluminum bronze, this has increased heat pipe and environment intensity of heat exchange, make its radiating rate than the former for fast, the refrigerating capacity that obtains is also bigger, but in its structure, increased collecting pipe and made its system select complex process, too many its quality of weld bond is difficult for guaranteeing.The third type is with the described two kinds of heat pipes of the patent of North China energy-saving investment Co., Ltd (02200194.8), can use heat conduction material preferably, can use blower fan also can not use blower fan, the box inboard of being fitted in working medium box and thermoelectric refrigerator hot junction is provided with some convex tendons, wing or pit or in theory comparatively desirable with its effect of lower plane increase heat exchange area.But from patent specification and Figure of description, we can only find out operation principle, do not know how the necessary area of dissipation of heat pipe forms.Only that is to say that from specification and accompanying drawing, the heat in thermoelectric refrigerator hot junction can be passed to heat pipe rapidly, needed area of dissipation in the environment but heat pipe looses heat.In addition, find out from figure and to have adopted the fin-tube type radiator, but less because of the thermoelectric refrigerator size, will be very little with going out three pipe its spacings in the corresponding working medium box of its size.Go up at the very little copper pipes of three spacings and to adorn the fin of copper aluminium matter, it is the area of dissipation that can't reach required in the relevant size range of water dispenser.

Summary of the invention

For addressing the above problem, the purpose of this utility model is to provide a kind of thermoelectric refrigerator heat-pipe radiator that obtains big refrigerating capacity and refrigeration coefficient.

The purpose of this utility model is realized by following technical scheme.

A kind of thermoelectric refrigerator heat-pipe radiator, it is by working medium box (1), filling pipe (2), bottom plate (3), U type copper pipe (4), upper head plate (5), aluminium foil fin (6) constitutes, two arms (41) (42) of U type copper pipe (4) and the intersection point of working medium box (1) are respectively at the top and the side lower part of working medium box (1).The bottom of working medium box (1) is working medium box bottom (14), is connected with filling pipe (2), and upper head plate (5) and bottom plate (3) lay respectively at the both sides up and down of radiator, and aluminium foil fin (6) is housed on upper head plate (5).

Be provided with workpiece (11) in the working medium box (1), be welded with workpiece (12) on the workpiece (11), the side of workpiece (11) is connected and installed with thermoelectric cooling device (7).

Working medium box (1) can also can be made with aluminium by the red copper manufacturing.

U type copper pipe (4) can substitute with U type aluminum pipe, but must use identical materials with working medium box (1).

U type copper pipe (4) inwall is smooth, also can make groove or screw thread, but its trench section square type, triangle, trapezoidal, inverted ladder type or semicircle type.

Aluminium foil fin (6) can replace with Copper Foil, and the surface of aluminium foil fin (6) can be the plane, also can be that generation is ripply, can also be special-shaped surfaces such as put in a skylight.

On having, workpiece (11) in the working medium box (1) is welded with workpiece (12).Some convex tendons, wing can be made in other surface of working medium box, and some increase the measure of its rigidity and intensity and to increase the heat radiation exchange area pit etc.

The utility model utilizes the interior working medium heat absorption carburation by evaporation of working medium box and the principle work of condensation heat release, the heat in thermoelectric refrigerator hot junction can be left rapidly, makes the cold junction of its thermoelectric refrigerator produce bigger refrigerating capacity and refrigeration coefficient.Because working medium box and thermoelectric refrigerator hot junction are close to the face inner surface and are welded with stud, all the other 5 inner surfaces have also been done the measure that increases rigidity and heat exchange area, so the utility model can make the thermoelectric refrigerator cold junction produce bigger refrigerating capacity and refrigeration coefficient.If the utility model is used on the semiconductor refrigeration box, can obtain 27 ℃ the temperature difference.

Description of drawings

Fig. 1 is the structural representation of the utility model thermoelectric refrigerator with heat-pipe radiator;

Fig. 2 is the right view of Fig. 1;

Fig. 3, Fig. 4 are for being the structural representation of

workpiece

11,12.

The specific embodiment

Shown in Fig. 1,2,3,4, a kind of thermoelectric refrigerator heat-pipe radiator of the utility model is made up of working medium box 1, filling pipe 2, bottom plate 3, U type copper pipe 4, upper head plate 5 and aluminium foil fin 6.

After thermoelectric cooling device 7 is connected direct current, its hot junction generates heat rapidly, the workpiece 11 of the working medium box 1 that will be close to it, workpiece 12 heat rapidly, and the working medium that will be filled in the working medium box 1 by

workpiece

11,12 heats, the working medium heat absorption is evaporated to for the working substance steam that pressure is arranged, working substance steam rises and descends along 41,42 parts of U type copper pipe 4, thereon in liter and the decline process, carry out heat exchange with 41,42 two parts of U type copper pipe 4, be about to its heat and reach tube wall and rise and be contained on the aluminium foil fin on the U type copper pipe.By the heat radiation that forces of axial flow blower, its heat by the distinguished and admirable generation of axial flow blower in environment.The heat radiation of the working substance steam that is cooled is condensed among worker quality liquid gets back to working medium box 1 along 41,42 two parts of U type copper pipe 4.Move in circles, the working medium heat absorption in the working medium box is vaporizated into working substance steam, and working substance steam is cooled and is condensed into worker quality liquid, gets back in the working medium box.For increasing working medium box and hot working fluid exchange area in it, welded part 12 on the part 11 of working medium box 1, its utility model toggle speed is accelerated and the rate of heat dispation raising.For the worker quality liquid temperature part 42 that reduces condensation should be on working medium box bottom 14, under the horizontal center line with the intersection point of working medium box.

Claims

1, a kind of thermoelectric refrigerator heat-pipe radiator, it is characterized in that: it is by working medium box (1), filling pipe (2), bottom plate (3), U type copper pipe (4), upper head plate (5), aluminium foil fin (6) constitutes, two arms (41) (42) of U type copper pipe (4) and the intersection point of working medium box (1) are respectively at the top and the side lower part of working medium box (1); The bottom of working medium box (1) is working medium box bottom (14), is connected with filling pipe (2), and upper head plate (5) and bottom plate (3) lay respectively at the both sides up and down of radiator, and aluminium foil fin (6) is housed on upper head plate (5); Be provided with workpiece (11) in the working medium box (1), be welded with workpiece (12) on the workpiece (11), the side of workpiece (11) is connected and installed with thermoelectric cooling device (7).

2, thermoelectric refrigerator heat-pipe radiator according to claim 1 is characterized in that: working medium box (1) can also can be made with aluminium by the red copper manufacturing.

3, thermoelectric refrigerator heat-pipe radiator according to claim 1 is characterized in that: U type copper pipe (4) can substitute with U type aluminum pipe, but must use identical materials with working medium box (1).

4, thermoelectric refrigerator heat-pipe radiator according to claim 1 is characterized in that: U type copper pipe (4) inwall is smooth, also can make groove or screw thread, but its trench section square type, triangle, trapezoidal, inverted ladder type or semicircle type.

5, thermoelectric refrigerator heat-pipe radiator according to claim 1, it is characterized in that: aluminium foil fin (6) can replace with Copper Foil, and the surface of aluminium foil fin (6) can be the plane, also can be that generation is ripply, can also be special-shaped surfaces such as put in a skylight.

6, thermoelectric refrigerator heat-pipe radiator according to claim 1 is characterized in that: working medium box (1) is gone up except that the surface that is welded with workpiece (12), and other surface can be added with convex tendon, wing or pit.