KR940002221B1 - Refrigerator - Google Patents

Abstract

The refrigerator of stirling cycle type cooling without using freon gas coolant, transfers cold air to the cold chamber or freezing chamber respectively. The refrigerator comprises a stirring-cycle freezing device (3), heat exchanging pipes (12,13) connected to the device (3) for transferring cold air to the separated cold/freezing chambers respectively; sections (8)(8') for controlling temperatures of cold/freezing chambers to adjust cold air transfer ability of the pipes (12,13). A pair of cold air circulating fans (7) are mounted at respective cold/freezing chambers so to increase the cooling performance and reduce the noise generated from the refrigerator.

Description

Refrigerated and freezer separated refrigerator

1 is a side view of a new type refrigerator using a conventional heat pipe.

2 is a side view of the new type refrigerator of the present invention.

3 is a schematic diagram of a sputtering refrigerator.

Figure 4 is a schematic diagram showing the heat pipe connection state of the heat absorber of the refrigerator.

5 is a schematic view showing a heat radiator and a heat pipe connection state.

6 is a sectional view of a heat pipe.

7 is a schematic view showing the configuration of a refrigerating compartment temperature control device.

8 is a schematic diagram showing a capacity control system of a refrigeration machine.

* Explanation of symbols for main parts of the drawings

1: heat absorber 2: heat sink

3: sterling refrigeration machine 5: cold air transfer heat pipe

6: cold air transfer heat exchanger 7: cold air circulation fan

12: heat pipe for freezer 13: heat pipe for cold compartment

16: heat absorber of the freezer 17: radiator of the freezer

18: regenerator of the freezer 21: linear motor

25: endothermic substrate 27: wick

28: variable resistor 29: variable resistance regulator

30: bellows 31: working fluid

32: heat pipe switch

The present invention relates to a refrigerator, and more particularly, to a new type refrigerator for cooling by using a Stirling freezer without using freon gas as a refrigerant and separately delivering cold air to a refrigerating compartment and a freezing compartment in a cold air delivery method.

The new type refrigerator using a conventional heat pipe is connected to a freezer 3 operated by a stiring cycle and a cold air generating unit of the freezer 3 as shown in FIG. 1 to promote heat exchange with air in the freezer compartment. The heat pipe 5 and the cold air heat exchanger key 6, the heat pipe to release the heat released from the radiator 2 of the freezer, the cold air circulation fan and the freezer and the refrigerating compartment to increase the heat exchange amount of the cold cut heat exchanger. It is composed of a voltage control unit and a temperature sensor (8) for maintaining the temperature of the temperature appropriately. In the refrigerator, a cooling effect is generated by the freezer 3 operating as a stiring cycle, and the generated cold air is transferred to the freezer compartment by driving a heat pipe, a cold air transfer heat exchanger, and a fan. In addition, the cold air of the freezing compartment is delivered to the refrigerating compartment according to the detection of the temperature sensor of the refrigerating compartment through the pipe for the flow circulation. The heat emitted from the radiator 2 of the freezer is radiated to the outside of the refrigerator through a heat pipe in contact with the radiator of the freezer. Refrigeration chamber and freezer compartment temperature control is to adjust the refrigeration capacity of the freezer by proportionally controlling the voltage supplied to the linear motor, which is a part of the freezer according to the temperature set by the temperature sensor and the control unit. In a new type refrigerator using a conventional heat pipe, defrosting of the heat exchanger is inevitable because air in the refrigerating chamber is frosted in contact with the cold air transfer heat exchanger in the freezing chamber. In addition, the cold air of the freezer compartment is transferred to the refrigerating compartment, which increases the separator between the refrigerating compartment and the freezing compartment, and increases the power consumption of the fan by the flow resistance in the pipe. Noise generated by the wall impingement (flow impingement) of the flow appearing in the process of separation into the freezer had an unavoidable problem.

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

The refrigerator according to the present invention uses a working gas such as He, and a refrigeration machine (3) operated by a stiring cycle and two heat pipes (12, 13) for separately delivering cold air to the refrigerating compartment and the freezing compartment, and cooling air for increasing the amount of cooling. Two circulation fans (7), a heat radiation heat pipe (11) for sending the heat emitted from the radiator of the freezer to the outside of the refrigerator, detects the temperature of the freezer compartment and transfers to the freezer compartment temperature control unit (8), including the freezer, and the refrigerating compartment It consists of a refrigerator compartment temperature control unit 8 'for adjusting the amount of cold air.

Here, the configuration of the Stirling Refrigerator (3) of the present invention is a heat absorber (1), radiator (2), regenerator (5), displacer (19), piston (20) and linear motor (21) as shown in FIG. The space in the cylinder is composed of an upper operating section 22, a lower operating section 23 and the reaction space 24. The heat absorber 1 of the refrigerating machine 3 and the refrigerating compartment and the freezer compartment heat pipe connection form the cap of the condensation part of the heat pipes 12 and 13 to cover the heat absorber 1 as shown in FIG. In order to increase the heat absorbing capacity and the structure is composed of a fin (15) mounted on the heat absorber. And as shown in (a) and (b) of FIG. 5, the outer structure is formed around the radiator 17 by the evaporation part of the heat pipe 11 and the inside is filled with water.

The configuration of the freezer compartment and the refrigerating compartment temperature control unit 8, 8 ′ is shown in FIG. 7 as shown in FIG. 7. The variable resistor 25, the variable resistance regulator 26, the bellows 16, the working fluid 17 sensitive to temperature changes, The heat pipe is opened and closed 18. Refrigeration capacity control of the refrigerator in the present invention is performed in the refrigeration capacity control unit, the control unit is configured by connecting the components of the temperature control device of the refrigerator compartment and the freezer compartment in parallel as shown in FIG.

In the refrigerator according to the present invention, a cooling effect is generated by the freezer 3 operated by a stiring cycle, and the generated cooling effect is appropriately transmitted through the respective heat pipes 12 and 13 according to the temperature of the refrigerator compartment and the refrigerator compartment. . In addition, the amount of heat emitted from the radiator of the refrigerator 3 is discharged to the outside of the refrigerator by the heat pipe 11 connected to the radiator of the refrigerator 3.

The principle of generating the cooling effect of the Stirling refrigeration machine 3 used in the present invention is the same as the reverse cycle of the Stirling engine operation principle. That is, instead of receiving heat from the high temperature heat absorber 1 and releasing heat from the low temperature radiator 2 to obtain power by isothermal expansion and isothermal compression, the piston 20 is applied to the linear motor 21 in reverse. It is to isothermal expansion by isothermal expansion by the downward motion to obtain a cooling effect in the heat absorber (1), and to release the heat from the radiator (2) during compression to be isothermal compression.

The operating principle of the heat pipes 11, 12, and 13 is that the working fluid in the heat pipes 11, 12, and 13 absorbs heat from the evaporator as shown in FIG. The working fluid arrives at the condenser and the heat is released from the condensate, making the working fluid liquid. This liquid working fluid reaches the evaporation section through a wick 14 causing a capillary phenomenon. The cold air of the refrigerating device is transferred to the refrigerating chamber and the freezing chamber through the heat pipes 12 and 13 by the circulation process, and the heat radiation of the heat dissipation pipe 11 also uses the basic principle of the heat pipe.

When the temperature of the refrigerator compartment and the freezer compartment reaches a desired range, the heat pipe switch 18 blocks the flow path of the heat exchanger 6 so that the working fluid in the heat pipe is not circulated. When the variable resistance is set by the resistance regulator 26 to reach a predetermined value, the freezing machine 3 does not play a special role because the linear motor 21 of the freezing machine does not operate. When the temperature of the freezer compartment and the refrigerating compartment is greater than the specified temperature, the working fluid in the bellows 16 expands and the heat pipe switch 18 opens so that the working fluid in the heat pipe circulates, and the variable resistance regulator 26 is suitable. As shown in FIG. 8, the resistance is energized, and the linear motor 21 is operated to exert a freezing capacity. At this time, if the variable resistance regulator 26 is connected with a suitable selection controller (for example, strong cooling, moderate cooling, etc.), the desired function is sufficiently performed. The variable resistance regulator 26 may be a roll spring can be selected by using a handle. If the temperature of the refrigerating chamber 10 is maintained at a predetermined temperature in a situation in which the forming motor 21 is driven because the temperature of the freezing chamber 9 becomes high, the cold air generated in the Stirling freezer 3 is only in the freezing chamber 9. Supplied. Because the bellows 16 of the freezer compartment 9 is in an expanded state, the heat pipe switch 18 is in an open state, but the bellows 16 of the refrigerating compartment 10 is in an unexpanded state. Is in a closed state.

The cooling capacity of the freezer 3 of FIG. 3 used as the freezer in the present invention varies depending on the displacement size of the movement of the piston 20. Since the movement of the piston is composed of all or part of the piston 20 consists of permanent magnets, the displacement of the piston 20 is changed by the number of turns of the linear motor 21 or the current flowing through the winding. Due to the characteristics of the refrigeration apparatus of FIG. 3, the adjustment of the cooling capacity is easiest to change the amount of current flowing through the winding. Therefore, the refrigeration apparatus of FIG.

Effects obtained by the configuration of the present invention described above are as follows.

Since the refrigerator according to the present invention does not use freon gas that pollutes the environment, the refrigerator can cope with ozone layer destruction and global warming effects. Conventionally, the flow resistance in the duct increases due to the installation structure of the fan. However, in the present invention, the cold resistance heat exchanger 6 and the fan 7 are installed in the freezing chamber 9 and the refrigerating chamber 10, respectively, so that the flow resistance is reduced, which is relatively advantageous in terms of power consumption and noise. And even if a fan is used, the cool air circulation and pressure loss are small, so the noise is very small. In addition, since the refrigerator compartment and the freezer compartment are separated, no defrosting is required, and since only a simple separator is required between the refrigerator compartment and the freezer compartment, a refrigerator having the same appearance has a relatively large freezing and refrigerating volume and thus has good space utilization. In addition, by controlling the temperature of the refrigerating chamber and the freezing chamber reliably very advantageous for food storage, it has the effect of excellent adaptability to the change of freezing load.

Claims (7)

Sutering refrigeration machine (3) for generating a freezing effect using a Stirling cycle, and heat pipes (12, 13) connected to the freezing machine (3) to separately transfer the cooling capacity of the freezer to the isolated freezing compartment and the refrigerating compartment And a freezer compartment and a refrigerating compartment temperature control unit (8 ', 8') for adjusting the cold air transfer capability of the heat pipes (12, 13). The refrigerator according to claim 1, wherein cold refrigerator circulation fans (7, 7) are respectively installed in the freezing compartment and the refrigerating compartment to increase cooling capacity and reduce noise. The refrigerator according to claim 1 or 2, characterized in that a fin (15) is mounted on the surface of the heat absorber (1) of the Stirling freezer (3) to improve cooling capacity. The freezer compartment and the refrigerating compartment temperature control unit (8), (8 ') of the variable resistor 28, a variable resistance regulator (29) for adjusting the variable resistor (28), A refrigerator comprising: a heat pipe switch (32) for opening and closing the cold air heat exchanger (6), a bellows (30) and a working fluid (31) for operating the heat pipe switch (32) according to temperature. 5. The refrigerator according to claim 4, wherein said variable resistance regulator (26) is comprised of a roll spring. The refrigerator according to claim 4, wherein the variable resistance regulator (26) enables selection by temperature using a knob. The refrigerator according to claim 1 or 2, wherein the variable resistors (25) of the temperature controllers of the refrigerating chamber and the freezing chamber are configured in parallel and connected to the refrigerator.