KR930000941B1 - Stirling cycle type refrigerator - Google Patents

Abstract

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Description

Stirring Cycle Refrigerator

1 is a cross-sectional view of the Stirling cycle type refrigerator according to the present invention.

2 is a sectional view taken along the line A-A of the statue.

3 is a cross-sectional view of a stirling cycle module, which is an essential part of the present invention.

4 is a cross-sectional view taken along the line B-B in FIG.

Figure 5 is an exemplary view showing a radiator cooling method of the Stirling cycle refrigerator according to the present invention.

Figure 6 is another exemplary view showing a radiator cooling method of the Stirling cycle refrigerator according to the present invention.

(A) is an enlarged view of the main part of FIG. 6, (b) is a side view of (a).

8 is a cross-sectional view of a kinematic sterling cycle module applied to the present invention.

Figure 9 is a cross-sectional view showing the configuration and operation of the free piston type Stirling cycle module applied to the present invention.

* Explanation of symbols for main parts of the drawings

1: body 2: storage room

3: cooling circulation fan 3a: suction port

3b: discharge port 4: freezing chamber

4a, 4b: cold air flow port 5: cold storage room

5a, 5b: cold air flow port 6: module installation space

7: Cooling unit 8: Cold air passage

10: Stirring cycle module 15: endothermic

30: cold air flow control mechanism 31, 32: opening and closing plate

40: heat shield

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to refrigerators and, more particularly, to a Stirling Cycle Refrigerator configured to cool air in a Stirling cycle without using a refrigerant.

Conventional refrigerators use a Rankine cycle to circulate refrigerant through sealed pipes to cool the air. The refrigerant is condensed in the condenser and evaporated by passing through the expansion valve and the evaporator. On the other hand, the cooling is performed by circulating the cold air heat exchanged around the evaporator to the freezer compartment and the refrigerating compartment by means of an air circulation fan, wherein the air around the evaporator passes through the evaporator to provide the heat of evaporation to the refrigerant and itself. Is cooled.

Conventional refrigerators as described above have a serious adverse effect on air pollution, such as refrigerant (CFC series R-12) destroys the air ozone layer. Recently, the use of such refrigerants has been regulated. Was done. In addition, since an axial fan is used as a conventional refrigerator cold air circulation fan, there is a defect that the cold air circulation effect is lowered.

The present invention has been made to solve the above-mentioned conventional defects, the air is cooled using a Stirling cycle module (Stirling cycle module) as a cooler and the cooled air is circulated in the article storage room with a cold air circulation fan food It is an object of the present invention to provide a Stirling cycle type refrigerator which does not require a refrigerant by cooling an article such as this.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of the Stirling cycle type refrigerator according to the present invention, Figure 2 is a cross-sectional view of the AA line of the in-phase, as shown therein, installed in the inner storage compartment 2 and the rear of the storage compartment (2) of the main body (1) Stirring cycle module 10 and a cold air circulation fan (3) is installed on one side of the storage compartment (2) so that the air in the storage compartment (2) is circulated through the heat absorbing portion of the steering cycle module (10). .

The main body 11 has a freezing compartment 4 and a refrigerating compartment 5 divided into upper and lower inner portions to form a storage compartment 2, and a module installation space 6 is provided at the rear of the freezing compartment 4 and the refrigerating compartment 5. The sterling cycle module 10 is installed in the module installation space 6, and cold air circulates between the cooling unit 7, the freezing chamber 4, and the refrigerating chamber 5 above the module installation space 6. The cold air circulation structure is provided.

The cold air circulation structure has a cooling air circulation fan (3) in the upper portion of the module installation space (6), the discharge port (3b) toward the cold air flow port (4a) of the freezer compartment 4 and its suction port (3a) is the module installation space (6) And a cold air flow port 4b formed on the bottom surface of the freezing compartment 4, and between the freezing compartment 4 and the refrigerating compartment 5. After the discharge from the discharge port (3b) of the freezing chamber (4) after passing through the cold air flow port (4b) to form a cold air passage (8) to enter the cooling unit 7, the upper surface of the refrigerating chamber (5) On one side, forming a cold air flow port (5a) so that the cold air discharged to the cold air flow port (4b) flows into the refrigerating chamber (5), the cold air flow control to open and close the cold air flow port (5a) or to control the amount and flow direction of the cold air flow The mechanism 30 is installed, and the cold air of the refrigerating chamber 5 is cooled to the cooling unit 7 of the module installation space 6 on the rear surface of the refrigerating chamber 5. Mouth such that a structure is formed in the cool air yudonggu (5b).

In addition, a heat shield 40 is installed in the lower portion of the Stirling cycle module 10 to block the lower portion, which is a heat dissipation portion, from the refrigerating chamber 5.

The cold air flow openings 5b of the refrigerating chamber 5 are formed in plural sizes differently according to the height of the refrigerating chamber 5 to adjust the amount of cold air circulated in accordance with the height of the refrigerating chamber 5 so that each part of the refrigerating chamber 5 In order to maintain different refrigeration temperatures, the refrigerating compartment 5 may partition the inside thereof to form a plurality of compartments.

FIG. 5 shows an example of a cooling method for cooling the second tube (cooler tube) 16 of the Stirling cycle type refrigerator according to the present invention. As shown therein, the second tube 16 (FIG. 3) And the cooling fluid outlet 16a and the cooling fluid inlet 16b are connected to the cooling fluid inlet 2b and the cooling fluid outlet 24a of the heat sink 24 in which the cooling fluid is filled by a cooling fluid flow tube, and the cooling fluid is The pump 25 is connected to the flow pipe, and the heat dissipation plate 24 is provided with a cooling fan 26 on one side, and the second tube 16 is forced to circulate a cooling fluid having large specific heat (for example, water). To cool.

6 and 7 show another example of a cooling method for cooling the second tube 16. As shown in FIG. 6, the heat insulating material 27 is fixed inside the rear wall of the refrigerator main body 1 of FIG. The heat dissipation chamber 28 is formed, and the heat dissipation tube 29 is meandered in the heat dissipation chamber 28, and both ends of the heat dissipation plate 29 are provided with cooling fluid discharge and inlet. It is connected to each of (16a) and (16b), and the pump 25 'is connected to a predetermined portion of the heat sink (29), the cooling fluid is forced to circulate to the second tube (16).

The heat sink 29 may be installed on the rear or bottom surface of the refrigerator body 1.

The sterling cycle module 10 may use a free piston type sterling cycle module or a kinematic type sterling cycle module.

In the free piston type stirling cycle module, as shown in FIG. 9, the first actuator (displayer) 12 and the second operation example (piston) 13 are inserted into the main body 10, and At one side, the regenerator 17 is connected to the first tube (heater tube) 15 and the second tube (cooler tube) 16, and the burner 24 is installed above the first tube 15. . In addition, in the kinematic sterling cycle module, as shown in FIG. 8, the second actuator 13 is connected to the crankshaft 19 by the crank rod 18, and otherwise, the configuration of FIG.

The free piston type stirling cycle module has the first tube 15 in the initial operation state in which the first actuator 12 and the second actuator 13 are located at the top dead center as shown in FIG. 9 (a). When heated by the heat of combustion of the inner 24, the pressure of the working gas (working fluid) such as helium and air filled in the upper working space (expansion chamber) 21 and the lower working space (compression chamber) 22 by heat transfer is reduced. When the first actuator 12 and the second actuator 13 is pushed downward, the first actuator 12 is lowered faster than the second actuator 13 while lowering the lower working space ( 22) to reduce the volume.

Accordingly, the gas in the lower working space 22 moves to the upper working space 21 through the second tube 16, the regenerator 14, and the first tube 15, and the heat storage and burner 24 of the regenerator 17 are performed. The first operating body 12 and the second working body 13 are pushed further downward by expanding in the upper working space 21 by the heat of combustion of the first working body as shown in FIG. 12) and the second operating body 13 is in contact with the lower working space 22 is lost, as described above, the gas pressure of the upper working space 21 is the highest point, even after the lower working space 22 disappears the first working body (12) and the second actuator 13 are continuously lowered by the inertia force, and the state is as shown in FIG. 9 (d).

Even in the state of FIG. 9 (d), as the upper working space 21 continues to grow, the pressure in the space decreases, and the pressure in the reaction space 23 becomes larger than the pressure in the upper working space 21. Due to the pressure in the upper working space 21, the first working body 12 is first raised as shown in FIG. 9 (a) so that the gas in the upper working space 21 is discharged from the first tube 15, the regenerator 17, and The lower working space 22 is introduced into the lower working space 22 again through the second tube 16. When the gas flows into the lower working space 22, the pressure in the lower working space 22 is lowered, resulting in the second working body 13. It rises and is reduced to the state like FIG. 9 (c). In this way, the movement of one cycle is terminated, and power is obtained by repetition of the operation.

As described above, the Stirling cycle module, which is configured to move the first and second actuators 12 and 13 to obtain power by applying heat to the first tube 15, is moved to the Stirling engine. In this case, the kinematic type is also the same as the free piston type.

First, some of the free piston type cycle modules as described above will be described. First, the regenerator 17 serves as a heat storage material for storing a kind of heat. In other words, in order to operate the Stirling cycle, one must continuously supply heat to expand the working fluid (the heater tube acts) and on the other side to continue to release the heat to shrink the working fluid (cooler tube). Through this, the working fluid is energized with continuous expansion and contraction.

In addition, in order to combine the above operations in one cycle and operate more efficiently, the regenerator must have the function of heat storage in the following two processes.

A. When the working fluid moves from the first working body 12 to the lower working area 22 of the milia:

The working fluid continuously rises in temperature as it passes through the first tube 15 which receives heat. However, when the working fluid enters the lower working space 22, the second fluid must be cooled and contracted after passing through the second tube 16. Thus, when the heat is stored there through the regenerator 17, the second tube 16 is opened. As it passes by, the cooling is much better and it can enter the lower working space 22 at a lower temperature, and the shrinkage is also good.

B. When the working fluid moves back to the upper working space 21 of the millier to the first working body 12:

In order for the working fluid to expand in the upper working space 21, it must be supplied with heat passing through the first tube 15 (temperature rise). The working fluid passes through the regenerator 17, and the heat accumulated in the A process is recovered. Since it passes through the first tube 15, the temperature rise proceeds much more easily.

If you combine the A and B processes mentioned above into one, that is the Stirring cycle.

And the structure of the regenerator 17 to operate as described above does not have any particular shape, it may be present in a hermetic structure between the first tube 15 and the second tube (16).

In order to increase the overall cycle efficiency, the regenerator 17 is filled with a material having excellent heat storage capability.

In addition, the role of the first tube (heater tube) 15 is to supply a calorific value for the working fluid to expand better in the upper working space 21 as mentioned above. At this time, in order to transfer a large amount of heat from the heater (burner) to the working fluid, the number of heater tubes is increased as much as possible, and fins are attached to increase the heat transfer area.

For the same reason as above, the configuration of the heating unit is usually a tube, and the individual is called a heater tube.

In addition, the second tube (cooler tube) 16 serves as a cooling as mentioned above, the general structure is a shell and tube (shell and tube) method, the shell (shell) housing in the cooling match (usually : Water) and working fluid flows in the tube side.

It is used for the purpose of taking heat away from the working fluid so that it shrinks well in the lower working space 22, and the method is not necessarily a cell and tube method, but a heat pipe or a thermo-electric heat pump. By using a heat pump (TEHP) or the like, its original purpose can be achieved.

In addition, since burner 24 needs heat supply in order to generate power by using a stiring cycle, a small space including a heater tube (including an upper surface of the upper working space) is installed (combustion chamber) in order to solve this problem. Burns fuel with burner 24 to generate heat.

In the present invention, the combustion chamber and the burner 24 are not necessary since power is not generated by using a stiring cycle. That is, instead of heating the first tube 15 to the burner 24 to generate power, the burner 24 is removed and the linear motor 14 (FIG. 9) or the vacuum motor 20 is opposed to the above. (FIG. 8) By driving the second actuator 13 to form a stiring cycle, the amount of heat required when the upper operating space (expansion chamber) 21 isothermally expands is devoted to the ambient air in the first tube 15. Absorbed through absorption.

The first actuator 12 simply moves the working fluid to the expansion chamber 21 (upper operating space) and the compression chamber 22 (lower operating space), and initially the driving motor 20. It is moved by external force by) and once operated, it moves according to pressure difference due to expansion and compression of working fluid.

Therefore, the Stirling cycle module 10 applied in the present invention serves as a cooler because the first tube 15 absorbs and cools the heat of ambient air.

In the Stirling cycle module 10 applied in the present invention, since the first tube 15 absorbs heat and the second tube 16 heats as described above, the first tube 15 may absorb the heat absorber 15. , The second tube 16 will be described by describing the radiator 16.

As the refrigerator according to the present invention operates the Stirling cycle module 10 in FIG. 1, the heat absorber 15 cools the air of the cooling unit 7, which is a cold air generating space, and the cold air circulation fan 3. By circulating to each part by), the cold air discharged by the cold air circulation fan (3) flows into the freezing chamber (4) through the cold air flow port (4a) of the freezing chamber (4) and the cold air passage ( 8) flows into the cooling unit 7 through the cooling unit 7, and some of the cold air flows into the refrigerating chamber 5 through the cold air flow opening 5a, and the cooling unit 7 through the plurality of cold air flow openings 5b in the refrigerating chamber 5. ), The cold air introduced into the cooling unit (7) through the freezer compartment (4) and the refrigerating chamber (5) is heat-exchanged with the heat absorber (15) of the Stirling cycle module (10) and circulated as above. do.

The cold air flow control mechanism 30 installed in the cold air flow port 5a of the refrigerating compartment 5 is manually or automatically operated to adjust the amount and direction of the cold air flowing into the refrigerating compartment 5, and the cold air flow port 5b. As shown in FIG. 2, the middle portion is formed to be larger than the upper and lower portions so that the cold air flows to the middle portion, but is not limited thereto.

The refrigerating flow control mechanism 30 may have a configuration of opening and closing the opening and closing tube 31, 32 to open and close by rotating as an example, manually or automatically.

The shield 40 installed at the bottom of the sattering cycle module 10 shields the cold air from approaching the regenerator 17 and the radiator 16 which are the high temperature parts, thereby improving the cooling effect and affecting the heat absorber 15. Preventive coating can improve the heat exchange effect.

As described above, the refrigerator of the present invention uses the Stirring Cycle Module as a cooler to cool, thereby eliminating the need for the refrigerant at all, thereby eliminating the environmental pollution caused by the refrigerant, and generating the cold air. Since it depends on the rotational speed of the motor to operate the module there is an advantage that the cooling degree of the refrigerator can be easily adjusted by adjusting the rotational speed of the motor by controlling the current, voltage.

In addition, since the cold air is lowered sequentially through the freezer compartment, and in particular, the amount of cold air passing through each part in the refrigerator compartment can be controlled by the cold air inlet formed on the rear side of the refrigerator compartment. It can be used for the purpose, and can control the function of the freezer compartment and the refrigerating chamber by the cold air flow control mechanism, especially when using the freezer, rapid deep-temperature freezing is possible by the reduction of the cooling space.

Claims (10)

A main body 1 having a storage compartment 2, a sterling cycle module 10 installed at one side of the storage compartment 2, and an air in the storage compartment 2 is installed at one side of the storage compartment 2. Stirring cycle type refrigerator, characterized in that consisting of a cold air circulation fan (3) to be circulated through the heat absorber (15) of (10). The Stirling cycle type refrigerator according to claim 1, wherein the Stirring cycle module (10) is a free piston type Stirling cycle module or a kinematic Stirring cycle module. According to claim 1 or 2, wherein the freezer compartment 4 and the refrigerating compartment (5) is formed in the upper and lower inner portions of the main body 10 to form a storage compartment (2), the rear of the freezer compartment (4) and the refrigerating compartment (5) The module installation space 6 is provided in the unit, and the Stirling cycle module 10 is installed in the module installation space 6, and the cold air is provided in the cooling unit 7 and the freezer compartment 4 above the module installation space 6. And a cold air circulation structure so that cold air circulates in the refrigerator 5. 2. The cold air circulation structure of claim 1, wherein the cold air circulation fan has a discharge port (3b) directed toward the cold air flow port (4a) of the freezer compartment (4a) in the upper portion of the module installation space (6). Is installed to face the upper cooling unit (7) of the module installation space (6), and the cold air flow port (4b) is formed on the bottom of the freezing chamber (4) and between the freezing chamber (4) and the refrigerating chamber (5) A cold air passage (8) is formed so that the cold air discharged from the discharge port (3b) of the cold air circulation fan (3) and passes through the freezing chamber (4) and discharged into the cooling unit (7) is discharged from the cold air flow port (4b), On one side of the upper surface of the refrigerating chamber 5 is formed a cold air flow port (5a) so that the cold air discharged into the cold air flow opening (4b) flows into the refrigerating chamber (5), opening and closing the cold air flow opening (5a) or the amount and flow direction of the cold air flow Install the cold air flow control mechanism 30 for adjusting the cold air in the refrigerating compartment (5) in the rear of the refrigerating compartment (5) module installation space (6) Stirling cycle type refrigerator, characterized in that is configured to form a cool air yudonggu (5b) to be introduced into the upper cooling unit (7). 5. The refrigerator compartment of claim 4, wherein a plurality of cold air flow ports 5b of the refrigerating compartment 5 are formed in different sizes according to the height of the refrigerating compartment 5, so that the amount of cold air circulated according to the height of the refrigerating compartment 5 is adjusted. Stirring cycle type refrigerator, characterized in that each part of 5) configured to maintain the above-mentioned refrigeration temperature. The stirling cycle type refrigerator according to claim 2, wherein the stirling cycle module (10) is a motor whose rotation speed is variable so that the degree of cooling can be adjusted by the rotational speed of the motor. The Stirring cycle type refrigerator according to claim 6, wherein the cold air circulation fan (3) is sirocopene. The heat dissipation plate (24) according to claim 3, wherein the cooling fluid outlet (16a) and the cooling fluid inlet (16b) of the second tube (16) protruding outward from the rear wall of the main body (1) are filled with the cooling fluid. The cooling fluid inlet (24b) and the cooling fluid outlet (24a) of the cooling fluid flow pipe connected to the pump 25 to the cooling fluid flow pipe, and the cooling fan 26 is installed on one side of the heat sink (24) Stirring cycle type refrigerator, characterized in that. The heat dissipation member 28 is fixed inside the rear wall of the refrigerator main body 1 to form a heat dissipation chamber 28, and the heat dissipation tube 29 is installed in a meandering shape inside the heat dissipation chamber 28. Its both ends are connected to the cooling fluid outlet, the inlet (16a, 16b) of the second tube 16, respectively, characterized in that it is configured by connecting the pump 25 'over a predetermined portion of the heat dissipation pipe (29) Stirring cycle refrigerator. The Stirring cycle type refrigerator according to claim 1, wherein the heat sink (29) is installed at the rear and / or the bottom of the refrigerator.