CN2748842Y

CN2748842Y - Combination and separate type heat pipe radiator for thermoelectric refrigeration devices

Info

Publication number: CN2748842Y
Application number: CN 200420085101
Authority: CN
Inventors: 齐悦; 齐媛
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 combination and separate type heat pipe radiator for thermoelectric refrigeration devices, which mainly comprises a separate type heat pipe and an injection pipe. The separate type heat pipe is composed of an actuating medium box, a steam up-flow pipe, a condenser pipe, a steel wire and a supporting base. An injection pipe is added at the front part of the condenser pipe of the separate type heat pipe, which makes the actuating medium steam be passed the inflating cooling down of the injection pipe once before condensation. The temperature of the actuating medium liquid that is come back to the actuating medium box 1 is lower than the separate type heat pipe. On the same condition, the cold amount of the cold-end of the thermoelectric refrigerator and the coefficient of performance are increased.

Description

A kind of combination separate heat pipe radiator that is used for thermoelectric refrigerator

Technical field

The utility model relates to the heat abstractor in thermoelectric refrigerator hot junction, particularly a kind of combination separate heat pipe radiator.

Background technology

Because during the thermoelectric refrigerator operation, have direct current to produce Joule heat by thermoelectric couple, 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-0.5?I 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 conduction law.Derived as can be known by formula (1), under the situation that does not change thermoelectric couple 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 voltage, electric current, minimizing is brought into outside the Joule heat of cold junction relatively, the more important thing is the heat exchange pattern in the hot junction of improving thermoelectric refrigerator, the heat in hot junction is use up as early as possible shed, reduce the heat exchange that cold and hot end Yin Wendu accumulation forms, when improving the cold conduction pattern of cold junction, reduce the temperature difference at two ends to greatest extent, could obtain bigger refrigerating capacity.Therefore, development thermoelectric refrigerator hot junction is heat abstractor efficiently, is one of present thermoelectric (al) cooling industry problem anxious to be solved.

The radiator of better performances is various heat-pipe radiators in the market.We know that heat-pipe radiator is by the heat absorption of working medium evaporation, and the combination of this two process of heat radiation condensation moves in circles and works, and its radiating effect is than good many of traditional aluminium section bar gilled radiator.In the various heat-pipe radiator, separate heat pipe radiator effect with working substance steam and condensed working medium liquid film co-flow is better, and its maximum characteristics are that just a device does not have blower fan, its heat radiation process does not have noise to produce, but that weak point is a radiating effect is poorer slightly.(patents such as CN1103035C, CN2520484Y).

Summary of the invention

For addressing the above problem, the purpose of this utility model is to provide a kind of combination separate heat pipe radiator that is used for thermoelectric refrigerator that improves the separate heat pipe radiator performance.

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

A kind of combination separate heat pipe radiator that is used for thermoelectric refrigerator, it mainly is made up of separate heat pipe and playpipe (4).Constitute separate heat pipe by working medium box (1), vapor uptake (2), condenser pipe (5), heat radiation steel wire (6), bearing (3), (7).Playpipe (4) can replace with helically wound thin copper pipe; Playpipe (4) can be serially connected in the front portion of (5) of condenser pipe, also can be serially connected on any position of vapor uptake (2).Bearing (3) links to each other with vapor uptake (2), and bearing (7) is positioned at and the relative one side of bearing (3), and heat radiation steel wire (6) is laid on the surface of radiator.

In the inner surface of working medium box (1), it is square type or trapezoidal or leg-of-mutton stud that the plane that contacts with thermoelectric refrigerator (9) should add several sections, and other 5 inner surfaces should be made the groove of trapezoidal, rectangle, trapezoidal, the lonely shape of triangle or garden.

The utility model has installed playpipe additional in the front portion of separate heat pipe condenser pipe, make working substance steam before condensation, promptly pass through the once expansion cooling of playpipe, so make the more independent separate heat pipe of the worker quality liquid temperature of returning the working medium box low, so under the same conditions, the cold and the refrigeration coefficient of thermoelectric refrigerator cold junction have been increased.

Description of drawings

Fig. 1 is used for the structural representation of the combination separate heat pipe radiator of thermoelectric refrigerator for the utility model;

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

Fig. 3 is the left view of Fig. 1;

Fig. 4 is the structural representation of part 1;

Fig. 5 is the A-A cutaway view of Fig. 4;

Fig. 6 is the right view of Fig. 4;

Fig. 7 is the structural representation of workpiece 4.

The specific embodiment

Shown in Fig. 1-8, a kind of combination separate heat pipe radiator that is used for thermoelectric refrigerator of the utility model, separating heat tube radiator and the playpipe 4 be made up of working medium box 1, vapor uptake 2, bearing 3, condenser pipe 5, heat radiation steel wire 6, bearing 7 constitute.

After thermoelectric refrigerator 9 was connected dc source, its hot junction generated heat, and the worker quality liquid in the working medium box of being close to it 1 was heated and made it Buddhist rise.Working medium heat absorption boiling becomes working substance steam, carries the working substance steam of certain pressure and heat and comes out from working medium box 1, rise to part playpipe 4 rapidly along vapor uptake 2 before.Because both sides have the horn mouth of convergent and flaring respectively before and after the playpipe, and middle one section very little (see figure 7) of diameter, be compressed for the horn mouth of the steam that pressure and heat are arranged by convergent, the speed of service strengthens gradually, by the minor diameter section in the middle of the part 4 time, speed is maximum, and pressure also reaches maximum.Just when the divergent segment horn mouth, pressure and speed reduce promptly and are expanded the working substance steam high-voltage high-speed gradually by middle reduced diameter section, Working medium gas expansion moderating process, and temperature descends, and this is significantly to lower the temperature the first time of the present utility model.Expand and cooling after working substance steam with slower speed by condenser pipe with and move downward along the axis of condenser pipe 5, in motion process, working substance steam is by the tube wall of condenser pipe 5, with be welded in steel wire on condenser pipe 5 tube walls and be delivered in the environment and go, be during working substance steam moves downward along condenser pipe 5, be condensed into worker quality liquid gradually, return working medium box 1.Go round and begin again, realized the heat radiation in thermoelectric refrigerator 9 hot junctions.Because the utility model has added playpipe 4 on separate heat pipe, make the working substance steam in the separate heat pipe, expand and lower the temperature, increased a temperature-fall period, so the worker quality liquid that makes its more common separate heat pipe of worker quality liquid temperature of getting back to working medium box 1 get back to the working medium box is low, Th value in the formula (1) is reduced, it is (Th-Tc) value minimizing in the formula (1), so under the same conditions, the calorie value that is imported into cold junction by the hot junction of Fuli's leaf conduction law decision diminishes, and makes cold junction refrigerating capacity and refrigeration coefficient become big.For accelerating the heat pipe toggle speed, working medium box 1 has increased several studs with the inboard of thermoelectric cooling device 9 contact-making surfaces, and on other 5 planes, has increased the groove of different shape in the working medium box.

Claims

1, a kind of combination separate heat pipe radiator that is used for thermoelectric refrigerator, it is characterized in that: it mainly is made up of separate heat pipe and playpipe (4); Described separate heat pipe is made of working medium box (1), vapor uptake (2), condenser pipe (5), heat radiation steel wire (6), bearing (3), (7); Playpipe (4) can be serially connected in the front portion of (5) of condenser pipe, also can be serially connected on any position of vapor uptake (2); Playpipe (4) can replace with helically wound thin copper pipe; Bearing (3) links to each other with vapor uptake (2), and bearing (7) is positioned at and the relative one side of bearing (3), and heat radiation steel wire (6) is laid on the surface of radiator.

2, the combination separate heat pipe radiator that is used for thermoelectric refrigerator according to claim 1, it is characterized in that: in the inner surface of described working medium box (1), it is square type or trapezoidal or leg-of-mutton stud that the plane that contacts with thermoelectric refrigerator (9) can be added with several sections, other 5 inner surfaces, the groove that can be made into trapezoidal, rectangle, trapezoidal, the lonely shape of triangle or garden.