KR20040048277A - Stirling cycle heat machinery - Google Patents

Abstract

The present invention relates to a heat exchanger structure of a sterling cycle system, and the heat exchange means of the conventional sterling cycle system includes a heat exchanger in which a heat exchanger fin, which is separately manufactured, is attached to the inside and the outside of a high temperature space and a low temperature space by soldering or an adhesive. There was a problem in that the number of air-assembling work is increased and the heat exchange efficiency is lowered by combining. The heat exchanger structure of the Stirling cycle system according to the present invention includes a heat exchanger a having a heat exchanger fin radially formed on an outer circumferential surface of the cylindrical heat exchanger frame, and a heat exchanger b having a heat bridge fin radially formed on an inner circumferential surface of the cylindrical heat exchanger frame. Heat exchanger formed by combining heat exchanger a and heat exchanger b with each other so that the spacing of fins of heat exchanger is densely formed is installed inside and outside of compressed space and inside and outside of expanded space. It is possible to improve the work life of the heat exchanger can be greatly shortened.

Description

Stirling cycle heat exchanger {STIRLING CYCLE HEAT MACHINERY}

The present invention relates to a heat exchanger structure of a sterling cycle system, wherein the heat exchanger of the present invention is formed by being divided into a cylindrical heat exchanger a having a heat exchanger fin formed on an outer circumferential surface thereof and a cylindrical heat exchanger b having a heat exchanger fin formed on an inner circumferential surface thereof. The present invention relates to a structure of a heat exchanger formed by coupling heat exchanger fins with each other so as to be densely constructed.

In general, a sterling device is a device that changes the temperature to a low temperature or a high temperature by using a principle that the temperature rises when the working fluid such as hydrogen gas or helium gas is compressed and the temperature drops when expanded.

As shown in FIG. 1A, a conventional Stirling refrigerator includes a cylinder (1) filled with a filling space (8), a compression space (8a), and an expansion space (8b) in which a working fluid such as hydrogen gas or helium is filled. 7) The displacer 4 and the piston 6 are installed inside, and the regenerator 3 is installed between the expansion space 8b and the compression space 8a.

In addition, the piston (6) is coupled to the mover (2a) of the linear motor (2) installed inside the case (1) for reciprocating movement, the displacer (4) extends through the center of the piston (6) A connecting rod 4a is provided, and an end of the connecting rod 4a is connected to the resonant spring 5 to reciprocate while having a predetermined phase difference from the piston 6 by the reciprocating motion of the piston 6. Will be

In the conventional Stirling device configured as described above, the piston 6 is reciprocated in the cylinder 7 by the reciprocating motion of the mover 2a coupled to the piston 6, and penetrates the piston 6. Thus, the displacer 4 connected to the resonant spring 5 reciprocates inside the cylinder 7 with a predetermined phase difference from the piston 6.

Accordingly, the volume of the compression space 8a and the expansion space 8b is variable, and the working fluid filled by the volume change thereof is isothermally compressed and isothermally expanded. Subsequently, the working fluid of the compression space 8a passes through the high temperature space portion 3a and heat is charged to the regenerator 3, and the heat filled therein is used to connect the high temperature internal heat exchanger 9a and the high temperature external heat exchanger 9c. Heat exchange through. The working fluid of the expansion space 8b passes through the low temperature space portion 3b, and heat is absorbed by the regenerator 3, and the absorbed heat is transferred through the low temperature internal heat exchanger 9b and the low temperature external heat exchanger 9d. Heat transfer).

The low temperature external heat exchanger 9d and the high temperature external heat exchanger 9c are installed on the outer circumferential surface of the case 1 in which the low temperature internal heat exchanger 9b and the high temperature internal heat exchanger 9a are combined, and a thin metal plate is provided in the case 1. The corrugated pipe is formed by alternately overlapping the outer peripheral surface of the predetermined time repeatedly. At this time, the corrugated pipe is configured such that a predetermined space is formed to smoothly flow the working fluid. In addition, the low temperature external heat exchanger 9d and the high temperature external heat exchanger 9c alternately formed as described above are fixed to the outer circumferential surface of the case 1 by using brazing or adhesives.

However, in the heat exchanger structure of the conventional sterling machine, the low temperature external heat exchanger 9d and the high temperature external heat exchanger 9c formed by the pleated pipe are bent to the outer circumferential surface of the case 1 by brazing or bonding. Due to the large number of labor, productivity is reduced, and the heat transfer efficiency is poor at these coupling sites.

The present invention is to solve the conventional problems as described above, an object of the present invention is to improve the productivity of the heat exchanger by simplifying the manufacturing process of the Stirling cycle heat exchanger, by combining the heat exchanger a and the heat exchanger b to each other By forming a heat exchanger, heat exchanger fins are densely constructed to provide a heat exchanger of a Stirling cycle system having improved heat exchange efficiency.

Figure 1a is a cross-sectional view schematically showing a conventional sterling machine.

Figure 1b is a cross-sectional view showing a heat exchanger structure of a conventional sterling machine.

Figure 2 is a cross-sectional view showing a Stirling device according to the present invention.

Figure 3a is a cross-sectional view showing the structure of a heat exchanger a according to the present invention.

Figure 3b is a cross-sectional view showing the structure of a heat exchanger b according to the present invention.

3c is a cross-sectional view showing the structure of a heat exchanger formed by combining a heat exchanger a and a heat exchanger b according to the present invention;

Figure 4 is a cross-sectional view showing the structure of a heat exchanger according to another embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10 Low temperature heat exchanger frame 11 Head

12 ... low temperature internal heat exchanger 13 ... low temperature external heat exchanger

14 ... high temperature external heat exchanger 15 ... high temperature heat exchanger frame

16 High temperature internal heat exchanger

21 ... expansion space 22 ... compression space

23.fill space 25 ... player

30 ... Display 31 ... Display Cylinder

40 ... piston 42 ... block

60 ... linear motor

The present invention for achieving the above object, the case is filled with a working fluid, a block provided with a piston cylinder inside the case, a linear motor connected to the piston resonant spring (not shown) in the block reciprocating movement, the block Pistons installed inside the piston cylinder of the cylinder and connected to the linear motor mover to be linearly reciprocated, displaced by a certain distance on the same axis as the piston cylinder so as to be partitioned into the compression and expansion spaces. The displacer is connected to the displacer resonance spring in the displacer and is reciprocated with a predetermined phase difference with the piston. The displacer is installed on the outer circumferential surface of the displacer cylinder to communicate the compression space with the expansion space and absorb and regenerate thermal energy. Low temperature heat exchanger formed in the expansion space A low temperature internal heat exchanger installed on an arbitrary inner circumferential surface to exchange heat energy of the low temperature space part, a low temperature external heat exchanger installed on an outer circumferential surface of the low temperature heat exchanger frame to exchange heat with a heat exchange medium, and installed on an inner circumferential surface of a high temperature heat exchanger frame formed in the compression space In the Stirling device having a high temperature internal heat exchanger for heat exchange of the heat energy of the high temperature space portion, an external heat exchanger installed on the outer circumferential surface of the high temperature heat exchanger frame to exchange heat with the heat exchange medium,

Simplify the manufacturing process of the low temperature internal and external heat exchangers installed on the inner and outer circumferential surfaces of the low temperature heat exchanger frame provided in the expansion space, and the high temperature internal and external heat exchangers installed on the inner and outer circumferential surfaces of the high temperature heat exchanger frame provided in the compression space. In order to improve productivity and improve heat exchange efficiency, the heat exchanger a formed on the outer circumferential surface of the heat exchanger fin and the heat exchanger b formed on the inner circumferential surface of the heat exchanger fin are combined to constitute a heat exchanger.

Hereinafter, with reference to the accompanying drawings a preferred embodiment according to the present invention will be described in more detail.

Figure 2 is a cross-sectional view showing the entire structure of the Stirling machine according to the present invention, Figures 3a and 3b is a cross-sectional view showing the structure of the heat exchanger a and the heat exchanger b according to the present invention, Figure 3c is a heat exchanger according to the present invention It is sectional drawing which shows the heat exchanger structure formed by combining a and heat exchanger b. 4 is a cross-sectional view showing a heat exchanger structure according to another embodiment of the present invention.

In the Stirling cycle system sterling apparatus of the present invention, as shown in FIG. 2, a block 42 having a piston cylinder 42a is provided inside a case 17 having an inner space to fill a working fluid, and the block 42 is provided. ), A linear motor 60 is installed, and then the piston cylinder 42a provided in the block 42 is connected to a mover 60a of the linear motor 60 and a piston 40 connected to a piston resonance spring (not shown). ) Is installed to reciprocate.

The displacer cylinder 31 made of plastic having low thermal conductivity is installed in series so that both ends thereof are opened at predetermined intervals from the piston cylinder 42, and the displacer cylinder 31 is installed inside the displacer cylinder 31. The displacer 30 is connected to the displacer rod 30a and the displacer resonance spring 70 so that the volume of the compression space 22 is changed by the piston 40 so that the displacer 30 is connected to the piston ( 40 and has a predetermined phase difference, and the reciprocating motion in the displacer cylinder (31).

Then, a compression space 22 is formed between the piston 40 and the displacer 30, an expansion space 21 is formed between the displacer 30 and the head 11, and the linear motor 60 is formed. The filling space 23 is formed inside the installed case 17.

In addition, a regenerator 26 is installed in a space having a predetermined width between the outer circumferential surface of the displacer cylinder 31 and the regenerator case 25 to communicate the compression space 22 with the expansion space 21 and absorb heat energy. And a stirling cycle for regeneration.

Cylindrical high temperature provided in the low temperature internal heat exchanger 12 and the low temperature external heat exchanger 13 and the compression space 22 installed on the inner and outer circumferential surfaces of the cylindrical low temperature heat exchanger frame 10 provided in the expansion space 21. The heat exchanger 100 applied to the high temperature internal heat exchanger 16 and the high temperature external heat exchanger 14 provided on the inner circumferential surface and the outer circumferential surface of the heat exchanger frame 15 includes a heat exchanger a having a heat exchanger fin 101b formed on an outer circumferential surface thereof. The 101 and the heat exchanger fins 102b are divided into heat exchanger b102 formed on the inner circumferential surface, respectively, and are formed to be bonded to each other to form a space between the heat exchanger fins.

The heat exchanger a 101 constituting the heat exchanger 100 has a plurality of heat exchanger fins 101b radially formed on the outer circumferential surface of the cylindrical heat exchanger frame 101a like the heat exchanger frame 101a. On both sides of the heat exchanger fin 101b, a plurality of auxiliary fins 101c each having a predetermined thickness and height are formed in the circumferential direction so as to provide a fin space 101e through which fluid can pass at a predetermined interval. An arc-shaped coupling groove 101d having a predetermined depth is formed between the heat exchanger fin 101b and the heat exchanger fin 101b formed on the outer circumferential surface of the heat exchanger frame 101a.

In the heat exchanger b 102 constituting the heat exchanger 100, a plurality of heat exchanger fins 102b are formed on the inner circumferential surface of the cylindrical heat exchanger frame 102a like the heat exchanger frame 102a. On both sides of the pin 102b, a plurality of auxiliary pins 102c having a predetermined thickness and height at predetermined intervals are respectively formed in the circumferential direction. In addition, the end of the heat exchanger fin (102b) of the heat exchanger b (102) is formed in the same shape as the coupling groove (101d) formed in the heat exchanger frame (101a) of the heat exchanger a (101), the heat exchanger A coupling groove 102e having a predetermined depth between the heat exchanger fins 102b formed on the inner circumferential surface of the heat exchanger frame 102a of b102 and a fixing groove 102d that may be coupled to a separate assembly member (not shown). ) Is provided at a predetermined position.

That is, the heat exchanger 100 is a heat exchanger fin formed in the heat exchanger frame 102a of the heat exchanger b 102 in a coupling groove 102d formed in the outer circumferential surface of the heat exchanger frame 101a of the heat exchanger a 101. The end of the heat exchanger (101b) is closely coupled to the end of the heat exchanger fin (101b) is formed in a predetermined depth on the inner peripheral surface of the heat exchanger frame (102a) of the heat exchanger b (102) The heat exchanger 100 is configured by being tightly coupled to the groove 102e.

In addition, the heat exchanger 200 of another modification has a heat exchanger fin 201b radially formed on the outer circumferential surface of the cylindrical heat exchanger frame 201a and an auxiliary fin 201c formed on the left and right sides thereof. And a heat exchanger fin 202b formed radially on the inner circumferential surface of the cylindrical heat exchanger frame 202a, and an auxiliary fin 202c on the left and right sides thereof and a coupling groove 202d on the left and right ends thereof. The heat exchanger 200 is manufactured by combining the base b 202, and the auxiliary fin 201c of the heat exchanger a 201 and the coupling groove 202d of the heat exchanger b 202 are closely coupled to each other. The basic concept is the same as that of the heat exchanger 100.

The material used to fabricate the heat exchangers 100 and 200 is not limited to aluminum (Al) or copper (Cu), and may be variously used as long as the material can heat exchange. In addition, the heat exchangers 100 and 200 are installed only on the inner circumferential surface of the low temperature heat exchanger frame 10 provided in the expansion space 21 and on the inner circumferential surface of the high temperature heat exchanger frame 15 provided on the compression space 22. Separate heat exchangers (not shown) may be formed on the outer circumferential surfaces of the base frame 10 and the high temperature heat exchanger frame 15, and may be used for various purposes without combining the heat exchanger a 101 and the heat exchanger b 102. Can also be used as a heat exchanger.

In the heat exchanger of the Stirling cycle system according to the present invention as described above, the heat exchanger a formed on the outer circumferential surface of the heat exchanger fin and the heat exchanger b formed on the inner circumferential surface of the heat exchanger fin in order to improve heat exchange efficiency by densely configuring the heat exchanger fin. Combining each other to form a heat exchanger has the advantage of simplifying the manufacturing process to improve productivity, heat exchange efficiency. In addition, both sides of the heat exchanger frame of the heat exchanger a and the heat exchanger frame of the heat exchanger b constituting the heat exchanger have a predetermined thickness and height such that a fin space through which a fluid can pass at a predetermined interval is provided. By directly forming the auxiliary fins each having a circumferential direction, it is possible to improve the heat exchange efficiency of the expansion space and the compression space.

Claims (4)

In a heat exchanger installed inside or outside the compression space to heat exchange the working fluid inside the compression space, and a heat exchanger of the Stirling cycle system installed inside or outside the expansion space to heat exchange the working fluid inside the expansion space, A heat exchanger a in which a plurality of heat exchanger fins having a predetermined thickness are formed on an outer circumferential surface of the cylindrical heat exchanger frame, and a heat exchanger b in which a plurality of heat exchanger fins having a predetermined thickness are formed on an inner circumferential surface of the cylindrical heat exchanger frame. Heat exchanger of the Stirling cycle system characterized in that is coupled to each other. According to claim 1, wherein the auxiliary fin is formed in the circumferential direction on the left and right sides of the heat exchanger fin formed in the heat exchanger a, and the auxiliary fin is formed in the circumferential direction on the left and right sides of the heat exchanger fin formed in the heat exchanger b. Heat exchanger of the Stirling cycle system, characterized in that the. The heat exchanger of claim 1, wherein an end of the heat exchanger fin formed in the heat exchanger a is tightly coupled to an inner circumferential surface of the heat exchanger frame of the heat exchanger b, and an end of the heat exchanger fin formed in the heat exchanger b is a heat exchanger of the heat exchanger a. Heat exchanger of the Stirling cycle system, characterized in that is produced in close contact with the outer peripheral surface of the frame. The heat exchanger of claim 1, wherein the heat exchanger a and the heat exchanger b are made of copper (Cu) or aluminum (Al).