KR940010580B1 - Stirring cycle - Google Patents

Abstract

The generator for improving system efficiency, prevents the mixing of the working gas and heat-radiating media or brine and heat-radiating media. The generator having upper/lower pumping chambers (24,25) with pump piston (23) under the cylinder (22) of stirling module (1), comprises bellows seal (30) for sealing connecting-rod passing hole (29a) on the partition wall (29) for separating the reaction space (18) and upper pumping chamber (24), which prevents the mixing of the working gas and heat-radiating media; bellows seal (31) provided between the lower pumping chamber (25) and the pump piston (23), which prevents the mixing of heat-radiating media and the brine.

Description

Stirling Cycle Cold Air Generator

1 is a cross-sectional view of a conventional sterling cycle refrigerator.

2 is a detailed cross-sectional view taken from the cold air generator in FIG.

3 is a cross-sectional view of the Stirling cycle refrigeration generator according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Stirling module 18: Recoil space

22: cylinder 23: pump piston

24,25: upper and lower pumping chamber 29: partition wall

30,31: Bellows Seal

The present invention relates to a Stirling cycle type cold air generator, in particular a Stirring cycle type cold air to improve the system efficiency by preventing the mixing of the operating gas and the heat transfer medium, and heat radiation medium and brine (cold heat transfer medium) of the Stirling module It is about a generator.

A refrigerator equipped with a conventional Stirring cycle cold air generator has a Stirling module (chiller) 1 which generates a cooling effect by the Stirling cycle as shown in FIGS. 1 and 2, and a heat absorber (cold heat) of the module 1. Endothermic heat exchanger (3) for exchanging the cold air of the generator (2) with air in the refrigerator, and an operating medium for transferring cold air from the heat absorber (2) to the endothermic heat exchanger (3). Brine, a heat absorber circulation pump 4 for circulating the brine, and a heat exchanger 6 for radiating heat from the radiator 5 of the Stirling module 1 to the indoor air in which the refrigerator is installed. In addition, as a working medium for transferring heat from the radiator 5 to the heat exchanger 6 for heat dissipation, a liquid (for example, water) having a large specific heat and convective heat transfer coefficient and a heat dissipation unit circulation pump 7 for circulating the liquid It consists of. In addition, it consists of a cold air circulation device (8), a temperature sensor (9), etc., which sends cold air passing through the endothermic heat exchanger (3) to each part of the refrigerator.

Conventional Stirring cycle refrigerator has a cooling effect is generated in the heat absorber 2 and the expansion chamber 10 of the module 1 by the module (1) operated by the Stirling cycle, the generated cooler is the heat absorber (2) and expansion The brine that has been transferred to and cooled by the brine filled in the heat absorber shell 11 surrounding the seal 10 is transferred to the endothermic heat exchanger 3 by the heat absorber circulation pump 4 to exchange heat with air in the refrigerator. The circulation is continued while generating the freezing and refrigeration effects of the refrigerator. In addition, the amount of heat discharged from the radiator 5 of the stirling module 1 is transferred to a liquid having a large specific heat and heat transfer coefficient filled in the radiator cell 12 surrounding the radiator 5, and the heated liquid is radiated from the radiator circulating pump 7. The heat is transferred to the heat exchanger 6 for heat dissipation, thereby dissipating heat to the indoor air in which the refrigerator is installed, and cooling itself to return to the heat dissipator cell 12 to continue circulation.

As described above, the conventional cold air generator includes an endothermic part circulation pump 4 for circulating the cooler generated in the Stirling module 1 to the endothermic heat exchanger 3 through brine, and a radiator of the module 1 Two pumps, such as a heat dissipation circulation pump (7) for transferring the amount of heat released from the heat dissipation heat exchanger (6), are required, which makes the configuration of the refrigeration system complicated and increases the price. In addition, the capacity of the endothermic circulation pump (4) and the heat dissipation circulation pump (7) should also be changed in response to the capacity change of the module (1) in order to fully exhibit the advantages of the capacity control characteristic of the Stirling refrigerator. Is needed, and an auxiliary device for instructing the circulation pumps (4) and (7) to sense the change in capacity of the module (1) is also required, which eventually increases the production cost of the refrigerator.

In FIGS. 1 and 2, reference numeral 13 denotes a linear motor, 14 a piston, 15 a displacer, 16 a regenerator, 17 a compression chamber, 18 a reaction space, 19 a voltage control device, 20 Silver microcomputer, 21 voltage controller, and 22 cylinder.

Therefore, the applicant of the present invention has been invented to solve the above-mentioned defects, and applied for a patent for a sterling cycle type cold air generator having a cold air transfer brine circulation pump and a heat transfer medium circulation pump integrated under the cylinder of the stirling module. He was elected to 91-15049.

The present invention is an improvement of the above-described prior invention, it is provided to provide a sealing means that is not mixed with the operating fluid of the module, the heat transfer medium for heat dissipation and the heat absorbing brine, and devised to further improve the efficiency of the cold air generator. When the present invention will be described in detail by the accompanying drawings as follows.

3 shows the configuration of the Stirling cycle type cold air generator according to the present invention. As shown in the drawing, the pump piston 23 is installed at the lower portion of the cylinder 22 to provide the upper pumping chamber 24 and the lower pumping chamber 25. ) And connected to the lower portion of the piston 14 of the Stirling module 1 by the connecting rods 26 to each of the four flow paths 27a, 27b, and 27c in the upper pumping chamber 24 and the lower pumping chamber 25, respectively. And 27d, one-way check valves 28a, 28b, 28c, and 28d are provided.

In addition, in order to prevent mixing between the working gas in the reaction space 18 of the stirling module and the heat transfer medium in the upper pumping chamber 24, the through hole of the connecting rod 26 of the separating wall 29 is bellows. Sealing with a seal (30).

The check valve 28a of the upper pumping chamber 24 is connected to the radiator cell 12 by the flow path 27a, and the check valve 28a has a heat transfer medium from the upper pumping chamber 24 toward the radiator cell 12. Only flow.

The check valve 28b of the upper pumping chamber 24 is connected to the heat dissipation heat exchanger 6 outlet by the flow path 27b, and the check valve 28b is pumped by the heat transfer medium in the heat exchanger 6 for heat dissipation. Only flow into the seal 24.

The check valve 28c of the lower pumping chamber 25 is connected to the heat absorber cell 11 by a flow path 27c, and the check valve 28c has a cold air transfer brine in the lower pumping room 25. Only flow toward (11). The check valve 28d of the lower pumping chamber 25 is connected to the outlet of the endothermic heat exchanger 3 by a flow path 27d, and the check valve 28d has a brine pumped by the bottom end of the endothermic heat exchanger 3. Only flow into the chamber 25.

Since the pump piston 23 is placed between the heat dissipation medium for heat dissipation in the upper pumping chamber 24 and the cold brine in the lower pumping chamber 25, the pump piston 23 is made of a heat insulating material to reduce heat loss, and a bellows is provided at the bottom of the pump piston 23. The seal 31 is installed to prevent mixing due to leakage of the brine and the heat transfer medium, which may occur during the reciprocation of the pump piston 23. Here, the upper pumping chamber 24 may be configured such that the brine for cold air transfer and the lower pumping chamber 25 may be configured to pump the heat transfer medium for heat radiation.

In the Stirling cycle type cold air generator according to the present invention as described above, the pump piston 23 connected by the connecting rod 26 to the lower part of the piston 14 of the Stirling module 1 is a piston 14 by a linear motor 13. ) Reciprocates between the upper and lower pumping chambers 24 and 25. When the pump piston 23 moves downward, i.e., from the upper pumping chamber 24 toward the lower pumping chamber 25, the brine for cold air delivery filled in the lower pumping chamber 25 passes through the endothermic cell through the check valve 28c. It is sent out to (11) and cooled in the heat absorber cell (11) and flows to the heat absorbing heat exchanger (3) to generate a cooling effect, in the upper pumping chamber (24), the suction force is generated by the negative pressure, and thus the check valve 28b is opened, and the heat transfer medium for heat dissipation is sucked from the heat dissipation heat exchanger 6. In addition, when the pump piston 23 moves upward, that is, from the lower pumping chamber 25 toward the upper pumping chamber 24, the heat transfer medium sucked into the upper pumping chamber 24 is passed through the radiator cell 12 through the check valve 28a. And heats in the radiator cell 12 and flows to the heat radiating heat exchanger 6 to release heat, and the lower pumping chamber 25 generates suction force by negative pressure, and thus the end valve 28d opens and absorbs heat. The cold air transfer brine is sucked from the heat exchanger 3 for cooling.

As the pump piston 23 reciprocates, the suction and discharge processes as described above are repeated to continuously circulate the cold air transfer brine and the heat transfer medium for heat dissipation, thereby exerting a refrigerator function.

As described above, the effect of the present invention eliminates the need for a separate endothermic circulation pump (4) and a heat dissipation circulation pump (7) as in the conventional Stirling cycle type cold air generator, thereby reducing the cost and configuring the system. You can easily decorate. In addition, since the pump piston 23 is connected to the piston 14 of the module, the faster the speed of the module piston 14, the faster the speed of the pump piston, so that two pumps of variable capacity are provided without a separate auxiliary device. It immediately responds to the capacity change of 1) and increases the efficiency of the system. Furthermore, the bellows seals 30 and 31 prevent the mixing of the working fluid of the module, the heat transfer medium for heat dissipation, and the heat transfer medium and brine for heat dissipation, thereby improving the efficiency of the system.

The Stirling cycle type cold air generator of the present invention as described above may be applied to an air conditioner or the like in addition to a refrigerator. In this case, the heat absorbing heat exchanger may be installed in an indoor unit, and the heat radiating heat exchanger may be installed in an outdoor unit.

Claims (2)

In the case where the pump piston 23 is installed in the lower part of the cylinder 22 of the stirring module 1 and the upper and lower pumping chambers 24 and 25 are formed in the upper and lower parts thereof, the cylinder 22 of the stirring module 1 is formed. The bellows seal 30 for sealing the connecting rod through hole 29a is installed at the upper part of the separation wall 29 separating the reaction space 18 and the upper pumping chamber 24 to operate the module. Stirring cycle type cold air generator, characterized in that configured to prevent the mixing of the fluid and the heat transfer medium for heat radiation. The method of claim 1, wherein the bellows seal 31 is installed between the lower pumping chamber 25 and the pump piston 23 of the cylinder 22 to prevent mixing of the heat transfer medium and brine. Stirring cycle cold air generator.