KR100301466B1 - Structure and temperature cotrol method for cold storage room of refrigerator - Google Patents

Abstract

PURPOSE: Structure of a refrigerating compartment of a refrigerator and a temperature control method thereof are provided to keep the food stored in a door at a moderately low temperature by avoiding the temperature deviation in a cavity and to enhance performance and reliability of a refrigerator by realizing the uniform temperature distribution. CONSTITUTION: A cold air path(34) is formed to communicate to a middle refrigerating compartment door(40) from a cold air control device, and another cold air path(35) is formed to communicate to a lower refrigerating compartment door from the cold air control device. The cold air paths respectively have cold air inlets(34A,35A) and cold air outlets(34B,35B) to suck air from the cold air control device and discharge the cold air toward the middle and lower portions of the refrigerating compartment door. Cold air suction ports are formed at cold air inlet ducts to let the discharged cold air flow into the cold air inlet ducts. Cold air discharge holes are formed at the cold air inlet ducts to downward discharge the cold air sucked through the cold air suction ports. Cold air control diaphragms to selectively open and close the cold air paths are installed in the cold air control device. Concentrative refrigerating is performed corresponding to the difference between a reference temperature and the present temperature of the refrigerating compartment.

Description

Refrigerator compartment structure and temperature control method of refrigerators {STRUCTURE AND TEMPERATURE COTROL METHOD FOR COLD STORAGE ROOM OF REFRIGERATOR}

The present invention relates to a refrigerator compartment structure and a temperature control method of controlling a refrigerator compartment internal temperature while allowing a portion of the cold air cooled by an evaporator to be introduced into the refrigerator compartment to the refrigerator compartment door side.

In general, a refrigerator comprises a main body of a freezer compartment and a refrigerating compartment, and a door is installed at a front portion of the main body. The freezing chamber and the refrigerating chamber are made to circulate the cold air by the operation of the refrigeration cycle by the operation of the refrigeration cycle to freeze and refrigerated food, the refrigeration cycle is a high-pressure section in which the refrigerant gas is maintained at a high pressure state and the refrigerant gas Is composed of a low pressure part that is maintained at a low pressure state and circulates. The high pressure unit includes a compressor for converting low-temperature low-pressure gas refrigerant into a high-temperature high-pressure gas refrigerant, a condenser for converting the high-temperature, high-pressure gas refrigerant changed in the compressor into a liquid refrigerant of room temperature and high pressure, and a liquid refrigerant at room temperature and high pressure through the condenser. It consists of a dryer for dehumidifying. And a capillary tube for converting the liquid refrigerant of room temperature and high pressure dehumidified through the low pressure section into a liquid refrigerant of low temperature and low pressure, and an evaporator for absorbing external heat while changing the liquid refrigerant of low temperature and low pressure changed in the capillary into a gas state. It consists of an accumulator that blocks the vaporized liquid refrigerant from entering the compressor. In this refrigeration cycle, as shown in FIG. 2, the evaporator 2B is installed perpendicular to the cold air circulation path 2A at the rear side of the freezing chamber 20 in the refrigerator main body 1 to change the air in the refrigerator into cold air. The cold air is forced to circulate in the inside of the cold air circulation path by means of the driving of the blowing fan 2C provided on the upper side of the evaporator 2B and the blowing force thereof. In addition, the circulated freezer compartment and the refrigerating compartment cold air flows back into the freezer compartment suction duct 4A and the refrigerator compartment suction duct 4B formed in the partition wall 4 between the freezer compartment 20 and the refrigerating compartment 3, respectively, and the evaporator 2B. Some of the freezer compartment cold air returned to the side and returned to the evaporator 2B side are discharged to the refrigerating compartment 3 through the refrigerating compartment 3A at the rear side of the refrigerating compartment 3 and then again to the evaporator through the refrigerating compartment suction duct 4B. 2B) It is designed to freeze and refrigerate the food while keeping the inside at the set low temperature in the circulation system returning to the side. When the temperature becomes lower than that, the operation by the refrigeration cycle is stopped. On the other hand, the cold air introduced into the cold air circulation path 3A of the refrigerating compartment 3 is discharged into the refrigerating compartment 3 through the discharge port 3C of the cold air control device 3B installed on the rear wall of the refrigerating compartment 3. . In addition, the discharge port 3C is provided with a cold air blocking film (not shown) for opening and closing the discharge port 3C in accordance with the refrigerating chamber temperature. And the middle compartment and the lower compartment of the refrigerating compartment (3) is provided with a temperature sensor (3D) (3E) for detecting the middle and lower compartment temperature of the refrigerating compartment (3), the refrigerating compartment (3) is the temperature sensor The internal temperature of the refrigerating compartment 3 can be automatically adjusted by the cold air barrier operation according to the detection signal of (3D) 3E.

However, as described above, the refrigerator compartment structure of the conventional refrigerator is configured to discharge cold air cooled by the evaporator only at the rear wall of the refrigerator compartment, so that the inside of the refrigerator compartment is supercooled to about -15 ° C. and the refrigerator door side is relatively weakly cooled. Due to the temperature deviation phenomenon, the food stored in the basket of the refrigerator compartment door side may not be maintained at an appropriate low temperature, and this may cause damage to the food. In addition, as described above, the refrigerator compartment door side, which is difficult to maintain an appropriate low temperature state by weak cooling, has a problem in that the temperature of the refrigerator compartment door is further increased due to frequent opening and closing of the refrigerator compartment door of the user, thereby lowering food refrigeration efficiency.

Accordingly, an object of the present invention is to guide a part of the cold air discharged into the refrigerating compartment to the refrigerating compartment door side so that the refrigerating compartment door side can be maintained at the appropriate low temperature state.

1 is a front view of a refrigerator main body showing the internal structure of a typical refrigerator.

2 is a side cross-sectional view of FIG.

3 is a front view of the refrigerator main body according to the present invention;

4 is a side cross-sectional view of FIG.

5 is a cross-sectional view taken along the line A-A of FIG.

Figure 6 is a cross-sectional view showing the internal structure of the refrigerator compartment door according to the present invention.

7A and 7B sequentially illustrate a refrigerator compartment temperature control process according to the present invention.

7A is a flowchart in normal operation.

7B is a flowchart of intensive cooling.

* Explanation of symbols on the main parts of the drawings *

10: refrigerator body 20: freezer

21,31: Cold air circulation path 22: Evaporator

23: Blower fan 30: Refrigerator

32: cold air conditioner 32A: discharge port

32B, 32C: Cool control film 33,33A: Temperature sensor

34, 35: Cold flow path 34A, 35A: Cold air inlet

34B, 35B: Cold air outlet 40: Refrigerator door

41, 42: cold air inlet duct 41A, 42A: cold air intake

41B, 42B: Cold air discharge

In order to achieve the object of the present invention, in the refrigerator to allow the cold air cooled by the evaporator to be discharged to the refrigerating chamber through the discharge port of the cold air control device installed on the rear wall of the refrigerating chamber by the drive of the blower fan, Means for discharging a part of the cold air introduced into the cold air conditioner to the middle compartment and the lower compartment side refrigerator door; Means for sensing the middle and lower temperature of the refrigerator compartment; According to the signal sensed by the temperature sensing means is provided a refrigerator compartment structure of the refrigerator comprising a means for selectively supplying the cold air to the side door of the middle compartment or lower compartment refrigerator compartment.

In addition, the cold air supply means is a cold air inlet is located in the cold air control device and the cold air outlet through the cold air inlet is formed in the middle compartment and the lower compartment side cold air flow path formed in one side wall of the refrigerating compartment door side of the cold compartment door, and Cold compartments are formed in the refrigerating compartment door so that the cold air inlet is formed to coincide with the cold air outlet of the cold air flow path and discharges the cold air introduced through the cold air inlet through the cold air outlet of the lower side. It is characterized by consisting of cold air inlet duct.

[Claim 3] The method of claim 1 or 2, wherein the supply means is characterized in that it comprises a cold air control membrane to selectively open and close the middle or lower bay side cold air flow path inside the cold air control device.

A first step of driving the compressor and the blowing fan in conjunction with the operation of the refrigeration cycle; A second step of closing the cold air blocking membrane if the refrigerating chamber temperature is lower than the refrigerating chamber set temperature of 3.0 ° C by the operation, and otherwise continuously driving the compressor and the blowing fan; If the freezer compartment temperature is below the freezer compartment set temperature -18 ° C when the cold air barrier is closed, the compressor and the blower fan are stopped; A fifth step of, when the central coolant sensor temperature difference is greater than or equal to the set temperature difference of 1.7 ° C., in the centralized cooling, starting the central cooler central cooling, and otherwise entering the normal mode; A sixth step of returning to the middle cell sensor set temperature to -0.35 ° C to be in a normal operation mode, and continuing to concentrate cooling; A seventh step of performing Hakan concentrated cooling if the difference in the Hakan sensor temperature is equal to or higher than the set temperature difference of 1.7 ° C .; When the Hakan sensor set temperature reaches -0.35 ℃ by Hakan concentrated cooling, it operates in the normal mode.

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

Figure 3 is a front view of the refrigerator body according to the present invention, Figure 4 is a side cross-sectional view of Figure 3, Figure 5 is a cross-sectional view taken along the line AA of Figure 3, Figure 6 is a cross-sectional view showing the internal structure of the refrigerator compartment door according to the present invention, Figure 7A and 7B sequentially illustrate a refrigerator compartment temperature control process according to the present invention, and denotes a refrigerator main body. The refrigerator main body 10 is divided into a freezing compartment 20 and a refrigerating compartment 30 by a partition wall 4 as usual, and a cold air circulation passage 21 is provided at the rear side of the freezing compartment 20 and the refrigerating compartment 30, respectively. 31 is formed, the freezer compartment cold air circulation passage 21 is provided with an evaporator 22 and a blowing fan 23. In addition, the partition wall 4 is configured such that a freezer compartment suction duct 4A and a refrigerator compartment suction duct 4B are formed so that the air inside the freezer compartment 20 and the refrigerating compartment 30 can be returned to the evaporator 22 side again. do. The cold air cooled in the evaporator 22 is discharged to the refrigerating chamber 30 through the discharge port 32A of the cold air control device 32 installed on the rear wall side of the refrigerating chamber 30 together with the freezing chamber 20 discharge. The control device 32 is provided with a cold air blocking membrane (not shown) which is operated according to the internal temperature of the refrigerating chamber 30 so as to open and close the discharge port 32A. Along with this, the middle and lower chambers of the refrigerating chamber 30 are provided with temperature sensors 33 and 33A for sensing the internal temperature of the refrigerating chamber 30. In this refrigerator, the present invention is a cold air flow path (34, 35) is passed from the cold air conditioner 32 to the inside of the refrigerator compartment door 40 in the refrigerator compartment 30, as shown in Figures 3 to 6 It is made. One side of the cold air passage 34 and 35 is formed to pass from the cold air conditioner 32 to the middle compartment refrigerator compartment door 40 side, the other side of the cold air flow passage 35 is the cold air conditioner (32) It is formed to pass through to the Hakan refrigerator compartment door 40 side. In addition, the cold air inlet 34 and the cold air flow path 34 and 35 of the middle compartment and the lower compartment are respectively provided with cold air inlets so that the cold air introduced into the middle compartment and the lower compartment side refrigerator compartment door 40 can be discharged. 34A), and 35A of cold air discharge ports 34B and 35B. The refrigerating compartment door 40 is provided with upper and lower sides of the middle compartment and the lower compartment side cold air inlet ducts 41 and 42, and on one side of the cold air inlet ducts 41 and 42, the refrigerating compartment door 40 is closed. In the state, the cold air discharged through the cold air discharge ports 34B and 35B coinciding with the cold air discharge ports 34B and 35B of the cold air flow channels 34 and 35 flows into the cold air inflow duct 41 and 42 side. Cold air suction openings 41A and 42A are formed as possible. In addition, several cold air discharge holes 41B and 42B are formed in the cold air inlet ducts 41 and 42 so as to discharge cold air introduced through the cold air suction holes 41A and 42A to the lower side. In addition, inside the cold air conditioner 32, cold air control membranes 32B and 32C are provided to selectively open and close the middle and lower side cold air passages 34 and 35 according to the concentrated cooling mode.

Next, the operation and temperature control method of the present invention configured as described above will be described in detail with reference to FIGS. 7A and 7B. First, when the compressor (not shown) and the blower fan 23 are driven in accordance with the operation of the refrigeration cycle, the air in the freezer compartment 20 and the refrigerating compartment 30 is partitioned between the freezer compartment 20 and the refrigerating compartment 30. After the freezer compartment and the refrigerating compartment suction duct (4A) (4B) formed in (4) is returned to the evaporator 22 side, the returned freezer compartment and the refrigerating compartment air is cooled by the evaporator 22 and then circulated again in the interior of the refrigerator. And, it is returned to the evaporator 22, wherein some cold air is introduced into the cold air circulation path 31 of the refrigerating chamber 30, the cold air introduced in this way discharge port of the cold air conditioner (32) installed on the rear wall of the refrigerating chamber (30) It is discharged to the refrigerating chamber 30 through 32A). When the temperature of the refrigerating compartment 30 is under the normal operation, the refrigerating compartment temperature set at the microcomputer, that is, 3.0 ° C. or less, closes the cold air blocking membrane (not shown) inside the cold air regulating device 32 to control the cold air conditioner 32. It prevents the inflow of cold air into the refrigerating chamber 30 through the discharge port 32A of the freezer, and if the freezer compartment 20 temperature is below the freezing chamber temperature set in the microcomputer (not shown), that is, below -18 ℃, the compressor (not shown) And by stopping the refrigeration cycle operation by driving the blower fan 23 is to control the temperature under the normal operating state. On the other hand, during intensive cooling, first, the inside of the refrigerating compartment 30 is sensed by the middle and lower compartment side temperature sensing sensors 33 and 33A mounted on the front side of the middle compartment and the lower compartment side. That is, when a high-temperature food load is put into the middle compartment basket of the refrigerating compartment 30, the middle compartment side temperature sensor 33 detects this and transmits a detection signal to the microcomputer, and the microcomputer side temperature sensor 33 ) And compares the input of the middle column sensor temperature (door temperature before and after the door opening and closing) to the set temperature difference of 1.7 ℃ or more. When the middle column concentrated cooling starts, the middle side side cold air flow path is opened and the lower half side cold air flow path is closed by a cold air control membrane, and the cold air flowing into the cold air control device 32 is discharged from the cold air conditioner 32. Some cold air flows into the refrigerating chamber 30 through the cold air inlet 34A and flows into the middle compartment side cold air flow path 34. The cold air introduced into the middle compartment side cold air flow path 34 is discharged through the middle compartment side cold air outlet 32A formed in one side wall of the refrigerating chamber 30 on the refrigerating chamber door 40 side, and the discharged cold air is again Inflow to the cold air inlet duct 41 through the cold air inlet 41A of the middle compartment side cold air inlet duct 41 inside the cold compartment door 40 that matches the cold air outlet 32A while the cold compartment door 40 is closed. do. In addition, the cold air introduced into the cold air inlet duct 41 is discharged into the inside of the refrigerating compartment door 40 of the refrigerating compartment 30 through the cold air discharge holes 41B formed in the cold air inlet duct 41. In addition, when the set temperature of the middle cell sensor reaches -0.35 ° C through the discharging process as described above, it is converted back to the normal mode.

On the other hand, when a high-temperature food load is put into the lower basket of the refrigerating compartment 30, the lower temperature sensor 33A detects it and delivers it to the microcomputer, that is, the value by the detection signal transmitted to the microcomputer, that is, Hakan centralized cooling starts when the difference between the Hakan sensor temperature (temperature difference before and after door opening) is over 1.7 ℃. The Hakan concentrated cooling is similar to the upper-kankan cooling, the cold air is discharged to the refrigerating chamber 30 through the discharge port 32A installed on the rear wall of the freezing chamber 20, and some of the cold air is inlet of the cold air inlet 35 of the Hakan side cold air flow passage 35. Inflow to the (35A) side, wherein the middle compartment side cold air flow path 34 is closed by the cold air control film (). In addition, the cold air introduced into the Hakan-side cold air inlet 35A is discharged to the cold air outlet 32A through the cold air flow path, and the discharged cold air is again formed in the cold air inlet duct 42 of the refrigerating compartment door 40. The cold air inlet () is introduced into the cold air inlet duct 42 on the lower side, and the cold air introduced into the cold air inlet duct 42 is formed through several cold air outlet holes 42B formed in the cold air inlet duct 42. By discharging to the lower side, intensive cooling is performed on the lower side. Accordingly, the lower temperature of the lower compartment of the refrigerating chamber 30 is lowered. At this time, when the lower limit sensor set temperature by the lower temperature sensor 33A reaches -0,35 ° C, the lower temperature of the lower chamber side is converted into a normal mode and is operated.

As described above, the present invention allows the cold air to be discharged to both the front and rear sides of the refrigerating compartment to prevent the high temperature deviation between the inside of the refrigerating compartment and the low temperature of the refrigerating compartment door. It can be stored in the furnace, and it is possible to realize the uniformity of temperature distribution in the refrigerator, and the effect of not only refrigerating efficiency but also the performance and reliability of the apparatus can be further increased.

Claims (4)

A refrigerator for allowing cold air cooled by an evaporator to be discharged to the refrigerating compartment through a discharge port of a cold air conditioner installed on the rear wall of the refrigerating compartment together with a freezing compartment by driving a blower fan. Means for discharging to the middle compartment and the lower compartment side refrigerator door; Means for sensing the middle and lower temperature of the refrigerator compartment; And a means for selectively supplying cold air to the middle or lower bay refrigerator door according to the signal sensed by the temperature sensing means. According to claim 1, wherein the cold air supply means the cold air inlet is located in the cold air control device and the cold air outlet through the cold air inlet is formed in the middle compartment and the lower side of the refrigerator compartment door side of the cold compartment door side is formed in the middle compartment and the lower compartment side A cold air flow path and a cold air inlet are formed to coincide with the cold air outlet of the cold air flow path when the refrigerating compartment door is closed, and inside the refrigerating compartment door to discharge the cold air introduced through the cold air intake through the lower cold air discharge holes. The refrigerator compartment structure of the refrigerator characterized by the cold air inlet ducts installed in the middle compartment and the hakan side. The refrigerator compartment structure of claim 1 or 2, wherein the selective supply means comprises a cold air control membrane configured to selectively open and close the middle or lower side cold air flow path inside the cold air control device. . A first step of driving the compressor and the blower fan by the operation of the refrigeration cycle; A second step of closing the cold air blocking membrane if the refrigerating chamber temperature is lower than the refrigerating chamber set temperature of 3.0 ° C by the operation, and otherwise continuously driving the compressor and the blowing fan; If the freezer compartment temperature is below the freezer compartment set temperature -18 ° C when the cold air barrier is closed, the compressor and the blower fan are stopped. Otherwise, the compressor and the drive fan are continuously driven. A fifth step of, when the central coolant sensor temperature difference is greater than or equal to the set temperature difference of 1.7 ° C., in the centralized cooling, starting the central cooler central cooling, and otherwise entering the normal mode; A sixth step of returning to the middle cell sensor set temperature to -0.35 ° C to be in a normal operation mode, and continuing to concentrate cooling; A seventh step of performing Hakan concentrated cooling if the difference in the Hakan sensor temperature is equal to or higher than the set temperature difference of 1.7 ° C .; When the set temperature of the Hakan sensor reaches -0.35 ℃ by Hakan concentrated cooling, the refrigerator operates in the normal mode. Otherwise, the centralized cooling is carried out by the eighth process of continuing the Hakan concentrated cooling. .