KR20010017167A - Control device for cooling speed - Google Patents

Abstract

PURPOSE: A cooling velocity controller is provided to enhance the cooling velocity of a refrigeration compartment of a refrigerator and to shorten time required to keep the temperature of the refrigeration compartment regular by supplying cold air concentrically to a relevant position. CONSTITUTION: A cooling velocity controller is comprised of: plural, preferably four ducts(70a-d) connected with a discharge port of a refrigeration compartment fan(20) to supply cold air individually through both sides of a refrigeration compartment; temperature sensors(74a-d) mounted near each duct; a control unit for deciding the detected ambient temperature of each sensor; and a switch unit for opening/closing the front discharge end of each duct according to the decided signals of the control unit. The cooling velocity controller detects temperature difference of four parts centering on horizontal/vertical parts of the refrigeration compartment. The controller supplies a large amount of cold air concentrically to one of the parts having a high temperature. Therefore, the controller controls the cooling velocity depending on load changes.

Description

Cooling rate control unit {CONTROL DEVICE FOR COOLING SPEED}

The present invention relates to a cooling rate control device, and more particularly, by detecting each distribution temperature of the upper and lower sides of both sides of the refrigerator compartment and concentrating the supply of cold air to a higher temperature, thereby inducing the constant temperature of the refrigerator compartment distribution cold air in a short time. It relates to a refrigerator compartment cooling rate control device of the refrigerator so that the cooling rate of the refrigerator compartment can be freely adjusted.

In general, unlike the freezer, which maintains the stored food at about -18 ° C and maintains the stored food in a freezing state for a long time, the refrigerator's refrigerating chamber maintains an optimal storage state at about -2 to 3 ° C and is withdrawn from time to time. Refrigerated objects that can be stored, such as vegetables, bulbs, kimchi and the like is stored in the space.

As the refrigerator compartment stores the refrigerating objects that are drawn in and out from time to time, the load fluctuations are severe during the hour, and unlike the freezer compartment, the number of opening and closing of the refrigerator compartment doors is frequent, so that the temperature changes inside the refrigerator compartment due to such load fluctuations are severe. Only after cooling to constant temperature refrigeration can be stored for a long time to delay or damage the refrigeration object.

Therefore, the temperature sensor is provided on one side of the refrigerating compartment and the supply temperature of the cold air is determined by the temperature sensor and then the supply and blocking of the cold air is controlled.

For example, as described in the Republic of Korea Patent Publication No. 99-017802 [temperature control method of the refrigerator], the temperature sensor and the cold air outlet temperature sensor for sensing the temperature of the cold air outlet temperature and cold air In the temperature control method of the refrigerator including a cold air inlet temperature sensor for sensing the temperature of the inlet, A first step of determining whether the compressor and the fan of the refrigerator (on), If the compressor and the fan is on, the outlet temperature A second step of calculating a predetermined average value by giving a predetermined weight to the discharge temperature value detected by the sensor and the suction temperature value detected by the inlet temperature sensor, and calculating the average value calculated in the second step into the high temperature sensor The compressor and fan are turned off if the difference is within a predetermined temperature range compared to the temperature value detected by There are three steps to warm up to cool the food put into the store.

Prior to this, Korean Patent Laid-Open Publication No. 98-83064 [Refrigerating Method of Refrigerating Refrigerator], which targets a freezer rather than a refrigerator compartment, may be fully invented by those in the same industry. By controlling the opening angle of the damper flap that controls the amount of cold air supplied to the freezer by sensing the outside air temperature distributed around the refrigerator, it is possible to select and control the amount of cold air supplied to the inside of the refrigerator by adjusting it to the minimum level, the middle level and the maximum level. It is possible to achieve a high temperature in the room temperature by maintaining an adequate supply of cold air in the air accordingly.

However, these prior arts are intended to cool the interior of the refrigerator by simply increasing or decreasing only the amount of cold air supplied into the refrigerating compartment, so that the time for supplying the cooled air to the inside of the refrigerating compartment is lengthened.

For example, the conventional refrigerator compartment structure illustrated in FIG. 1 includes the respective cubic ducts 40 formed on both sides of the inner box 10 of the refrigerator compartment R and communicated with the chiller chamber 30 in which the refrigerator compartment fan 20 is installed, The cubic duct 40 is formed of a cold air supply passage consisting of a temperature sensor (S) installed on any one of the upper side.

Therefore, when a change in the load introduced into the refrigerator occurs, when a temperature value higher than a set value is detected by the temperature sensor S that detects the load, the microprocessor of the refrigerator (hereinafter referred to as a “control unit”) is the refrigerator compartment fan 20. This is forced to drive, and thus a unilateral and uniform cold air supply operation into the refrigerating chamber R is performed.

Therefore, when the loaded load is biased, the internal cooling of the cubic duct 40 which is not efficiently carried out is not performed efficiently, and the adjacent position of the cubic duct 40 with the load is biased is supercooled, and the load stored at some distance from it is completely cooled. There is a disadvantage that the distribution is easily damaged because the temperature difference is distributed.

Therefore, it is difficult to control the cooling rate inside the refrigerating chamber and also has the disadvantage that the time taken for the internal temperature of the refrigerator to be extended.

The present invention has been made in view of the above-mentioned shortcomings in the structure and control method of the conventional cold storage room cold air supply, and is designed to efficiently improve it, thereby enabling intensive cold air supply to the corresponding location actively and promptly according to the position of the input load. The purpose of the present invention is to provide a refrigerating compartment cooling rate control device of a refrigerator capable of improving the cooling rate inside the refrigerating compartment as well as shortening the time to cool the inside of the refrigerating compartment.

This object of the present invention communicates with the discharge side of the refrigerating chamber fan installed in the cooler chamber so that the discharged cold air can be individually supplied to the upper and lower sides of both sides of the refrigerating chamber, and a plurality of, preferably four ducts are connected to each other, and adjacent to each duct. Each temperature sensor is installed at the location, and the control unit determines the ambient temperature detected by each temperature sensor, and has opening and closing means for opening and closing the discharge end of each duct by a signal determined by the control unit. Is achieved.

Such opening and closing means according to the invention can be achieved, for example, by putting two plates with a plurality of cold air outlets against each other, one of which is fixed in position and the other of which is movable by a power source such as a drive motor. .

1 is a schematic front perspective view showing a refrigerator compartment of a conventional refrigerator,

2 is a schematic front perspective view of a refrigerating compartment equipped with a cooling rate control device according to the present invention;

Figure 3 is a perspective view showing an operating state of the slider for adjusting the cooling air amount of the cooling rate control apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

20: refrigerator compartment fan, 30: cooler chamber,

70a, 70b, 70c, 70d: duct, 72a, 72b, 72c, 72d: cold air outlet,

74a, 74b, 74c, 74d: temperature sensor, 80: slide,

81: engaging jaw, 82: mating portion,

90: fixture, 92a: upper guide,

92b: lower guide, 94: insertion hole,

96: gearwheel, M: drive motor.

Hereinafter, a preferred embodiment according to the present invention will be described in more detail by way of example on the basis of the accompanying drawings.

Figure 2 is a perspective view of the refrigerator compartment of the refrigerator according to the present invention from the front.

As shown in the figure, the discharge side of the refrigerating chamber fan 20 installed in the cooler chamber 30 on the rear side of the freezing chamber F is divided into four parts so that the first duct 70a, the second duct 70b, and the third duct ( 70c) and the fourth duct 70d.

Accordingly, the cold air blown by the forced driving of the refrigerating chamber fan 20 is separately supplied to upper and lower portions of both sides of the refrigerating chamber R through the respective ducts 70a, 70b, 70c, and 70d.

The cold air supply method is completely different from the conventional one, and if the conventional cold air supply method was a batch supply method, the supply method according to the present invention will be referred to as an individual supply method.

On the other hand, first, second, third, and fourth cold air outlets 72a, 72b, 72c, and 72d are formed at ends of the outlet side to the refrigerating chamber R, which are the ends of the respective ducts 70a, 70b, 70c, and 70d.

Each of the cold air discharge ports 72a, 72b, 72c, and 72d is provided with a cold air amount adjusting slide 80 to be described later.

On the other hand, the upper side adjacent to the cold air outlets 72a, 72b, 72c, 72d of each of the ducts (70a, 70b, 70c, 70d) to detect the ambient temperature of the corresponding cold air outlets (72a, 72b, 72c, 72d) Sensors, that is, first, second, third and fourth temperature sensors 74a, 74b, 74c and 74d, are provided.

The temperature sensors 74a, 74b, 74c, and 74d are electrically connected to the control unit of the refrigerator, and the temperature of each part is determined as a resistance value and sent to the control unit, and the control unit determines the temperature difference and the temperature with the preset value. After analyzing the difference, the refrigeration chamber fan 20 is forcedly driven regardless of the operating conditions of the refrigerator, and the cooling air outlet of the corresponding duct part which is determined to be high is opened to cool the corresponding part in a short time.

For example, when the temperature value detected by the first temperature sensor 74a is set as the reference temperature value and the cooling air can be supplied when the set temperature difference between the remaining temperature sensors 74b, 74c, and 74d is 3 ° C or more, the control unit After the first temperature sensor 74a, the second temperature sensor 74b, the third temperature sensor 74c and the fourth temperature sensor 74d received the temperature of the periphery of the periphery detected by the first temperature sensor 74a ) And the temperature value detected by the second, third, and fourth temperature sensors 74b, 74c, 74d are individually compared and judged, and when the temperature difference between each is more than 3 ° C, the duct determined to be high. Only the side cold air outlet is opened to cool the part.

That is, the reference temperature value detected by the first temperature sensor 74a is 2 ° C, the temperature value detected by the second and third temperature sensors 74b and 74c is 0 ° C, and detected by the fourth temperature sensor 74d. If the temperature value is 6 ° C., the control unit immediately drives the refrigerating chamber fan 20, opens the cold air discharge port 72d of the fourth duct 70d in which the fourth temperature sensor 74d is installed, and simultaneously rests. The cold air outlets 72a, 72b, and 72c are closed so that the surroundings of the cold air outlet 72d of the fourth duct 70d of which the high temperature is detected can be rapidly cooled, thereby achieving a high temperature within a short time.

Figure 3 is a perspective view showing the operating state of the slide provided in the cold air discharge port for controlling the cooling rate according to the present invention.

As can be seen through the drawings, four fasteners 90 are respectively provided in the cold air discharge ports 72a, 72b, 72c, and 72d respectively formed on both upper and lower sides of the inside of the refrigerating chamber R shown in FIG.

A plurality of cold air outlet holes 83a are formed on the fixture 90, and the cold air outlet holes 83a are preferably formed in a slot shape that is long in the longitudinal direction, but more preferably formed in a circular shape.

This is because it is easy to adjust the opening angle of the cold air outlet hole (83a) according to the left and right linear movement of the slide 80 to be described later can easily adjust the supply amount of cold air.

On the other hand, the adjacent rear side of each fixture 90 is provided with a rectangular slide 80 having a size corresponding to the fixture 90 and the corresponding cold air outlet (83b).

Preferably, the slide 80 is installed at almost no distance from the fixture 90, and is particularly preferably spaced about 2 to 6 mm to have some fluidity.

In addition, the slide 80 is formed at the upper and lower sides thereof so as to enable linear movement in the horizontal direction. " or " &Quot; Upper and lower side guides 92a and 92b in shape are provided.

In particular, the lower end surface of the lower guide (92b) of the guide (92a, 92b) is formed with a long rectangular insertion hole 94 in the transverse direction.

Thus, a driving source for allowing the slide 80 to slide in the left and right directions is installed in the insertion hole 94.

Therefore, the slide 80 is slidable in the left and right directions in the upper and lower guides 92a and 92b while being driven by the driving source.

In addition, the slide 80 is formed with a plurality of engaging portion 82 is formed on the bottom surface of the installed state so that the automatic control by the control unit of the refrigerator, this engaging portion 82 is a drive motor to be described later It is a part engaged with and engaged with the gear 96 of (M).

In addition, one side surface of the slide 80 is provided with a locking step 81 for guiding the upper and lower guides (92a, 92b) not to escape when the slide 80 slides.

The driving motor M is installed at the rear side of the slide 80 parallel to the bottom surface of the lower guide 92b, that is, inside the discharge side of each duct 70a, 70b, 70c, 70d.

In addition, a cogwheel 96 is fixed on the rotation axis of the driving motor M, and the cogwheel 96 is positioned at a transverse middle portion of the insertion hole 94 to engage the engaging portion of the slide 80 ( 82) and is fixed.

In addition, the driving motor (M) is electrically connected to the control unit of the refrigerator to control the forward and backward motion.

The present invention made of such a configuration is to control the cold air supply according to the internal temperature detected in the four parts inside the refrigerating chamber (R) is to cool the food stored in the constant temperature.

That is, when the refrigerator is operated in a normal operation state in which cooling or defrosting does not proceed, the cool air in the cooler chamber is maintained at a state where no cooling air is supplied into the freezing compartment or the refrigerating chamber.

This is because each inside has already met the inside temperature required for cooling or refrigeration.

At this time, when the load is put into the refrigerating chamber, the first, second, third and fourth temperature sensors 74a, 74b, 74c, and 74d installed in the refrigerating chamber detect the temperature distribution state of the adjacent position as a resistance value and send it to the control unit. .

Subsequently, the control unit receiving the transmitted signal compares the reference temperature value detected by the temperature sensor at the reference position with the comparison temperature value detected by the remaining three temperature sensors to determine whether the difference is greater than or equal to the set value.

If the third temperature sensor 74c exceeds the set value, the driving motor M is controlled to move the slide 80 on the third duct 70c side to open the third cold air discharge port 72c. By forcibly driving the refrigerating chamber fan 20 to induce concentrated cold air supply to the third cold air discharge port 72c side through the third duct 70c to reduce the high temperature inside the high distribution in the site.

Even during this process, each temperature sensor continuously detects the cold air temperature at the surrounding position and sends it to the control unit. The above process is continuously repeated until the condition is satisfied.

Of course, it is preferable to open all four ducts if all three places exceed the set value, and open only the corresponding ducts if two places.

By repeatedly performing such a process, it is possible to sensitively respond to the change in the internal temperature caused by the variation of the load, thereby shortening the internal temperature of the high temperature and facilitating the control of the cooling rate.

As described above, the refrigerator compartment cooling rate control apparatus of the refrigerator according to the present invention provides the following effects.

First, it is possible to easily detect the temperature difference in the four parts based on the upper and lower sides of the inside of the refrigerating chamber, and at the same time, a large amount of cold air can be quickly discharged only to the side where the temperature value is detected according to the difference in the detected temperature value. By doing so, it is possible to easily control the cooling rate according to the loaded load variation.

Second, it is possible to easily control the amount of cold air supply and at the same time intensive cooling only a specific part, it is possible to achieve the overall high temperature in a very short time.

Claims (1)

First, second, third, and fourth ducts 70a and 70b extending from the upper and lower sides of both sides of the refrigerating chamber R to communicate with the outlet side through which the cold air is discharged from the refrigerating chamber fan 20 installed in the cooler chamber 30. 70c, 70d), A fixture 90 fixed to an exposed end of the refrigerating chamber side of each of the ducts 70a, 70b, 70c, and 70d and having a plurality of cold air outlet holes 83a for supplying cold air; It is formed to correspond to the fixture 90 and is installed on the rear side of the fixture 90 with almost no gap, the lower surface is formed with a tooth-like engaging portion 82 and a plurality corresponding to the cold air outlet (83a) A slide 80 having a cold air outlet hole 83b of Upper and lower guides 92a and 92b installed at an adjacent rear upper and lower ends of the fixture 90 to support the slide 80 and to be movably guided in the horizontal direction; In the insertion hole 94 formed in the lower surface of the lower guide 92b is provided with a cog wheel 96 on its rotation axis to engage with the engaging portion 82 and on the lower surface and the horizontal surface of the lower guide 92b The installed driving motor (M), A control unit of the refrigerator electrically connected to the driving motor M to control forward and reverse rotation thereof; First, second, third, and fourth temperature sensors 74a, 74b connected to the control unit and installed at upper and lower sides of the respective ducts 70a, 70b, 70c, and 70d to transmit temperature values of the peripheral parts to the control unit. Cooling rate control device, characterized in that consisting of (74c, 74d).