JP2000337749A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive to construct a cold storage environment capable of suppressing degradation of freshness of housed cold storage foods without hindering the use convenience and styles of eating habits. SOLUTION: The cold storage environment having less temperature fluctuation or less temperature irregularity is obtained by promptly catching the rise of a temperature inside a cold storage room 2 resulting from a load fluctuation by detecting a preserved environment temperature inside the cold storage room 2 at a suction port 32 for cooling cold air in circulation, and catching the positions of foods at higher temperatures by plural temperature-detecting elements 31 provided on the suction port 32 for the cooling cold air and movably controlling a louver 29 forming an outlet 32 for the cooling cold air in a direction where objective foods lie.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the supply of cooling cold air into a refrigerator compartment of a refrigerator.

[0002]

2. Description of the Related Art FIG. 11 is a cross-sectional view of a refrigerator main body 1 as a conventional example. The storage compartment has a refrigerator compartment 2, a vegetable compartment 3, and a freezer compartment 4 from the top. The refrigerator compartment 2 has a refrigerating revolving door 6 held by a hinge mechanism 5, and the vegetable compartment 3 has a vegetable drawer door 7, a freezing compartment. The chamber 4 is configured as a storage form having an upper-stage freezing / drawing door 8 and a lower-stage freezing / drawing door 9. Inside the refrigerator compartment 2
A plurality of pockets 10 provided on the side of the refrigerated revolving door 6 serving as a storage section for refrigerated food, and a plurality of shelves 11 provided on the side of the refrigerator body 1 are arranged. A low-temperature storage room 18 having a temperature lower than the refrigeration temperature, which is constituted by a drawer 13 having a lid 12 on the front surface, is provided. The refrigerated foods and refrigerated foods such as beverages, seasonings, and prepared foods stored in the refrigeration compartment 2 have a size, quantity, shape,
It is stored in each storage section in terms of convenience and the like.

The inside of the vegetable compartment 3 is composed of a lower vegetable container 15 drawn out by a vegetable drawer door 7 and an upper vegetable container 14 disposed above the lower vegetable container 15. The size, amount, shape, and convenience of vegetables and fruits to be stored are stored. For this reason, they are classified and stored in each storage unit. The inside of the freezing compartment 4 is composed of an upper freezing container 16 drawn out by an upper freezing drawer door 8 and a lower freezing container 17 drawn out by a lower freezing drawer door 9, and the size, amount, and shape of stored frozen foods and frozen ingredients. , And are stored in the respective storage sections in terms of ease of use.

In each of the above-described storage chamber configurations, the compressor 1
A machine room 20 in which a refrigerator 9 and the like are disposed is disposed at a lower rear portion of the freezing room 4, and a cooler 21 is disposed so as to straddle the rear surface of the freezing room 4 and the rear surface of the vegetable room 3. It is arranged above the machine room 20 via a part of the heat insulating material to be formed.

[0005] A refrigeration cycle for cooling the inside of the refrigerator body 1 is provided so as to straddle a compressor 19 provided in a machine room 20 at a lower rear portion of the refrigerator body 1 and a back surface of the freezing room 4 and a back surface of the vegetable room 3. The cooler 2 is constituted by the cooled cooler 21.
The fan 23 for forced ventilation is rotated by a fan driving motor 23 provided on the upper part of the refrigerator 1 to circulate the air in the refrigerator body 1 and promote heat exchange in the cooler 21 to remove the cooled cool air. It is circulated through the cool air passage 24 into the refrigerator body 1. A defrosting tube heater 26 is provided below the cooler 21, and a defrosting water gutter 27 is provided below the cooler 21. The temperature of each storage room provided in the refrigerator main body 1 is controlled by the opening / closing operation of a cool air amount adjusting damper 25 provided in a part of the cool air passage 24.
Control is performed to maintain the temperature of each storage room at a predetermined temperature.

Next, the flow of the cooling cold air circulating in the refrigerator compartment 2 will be described with reference to the front view of FIG. 12 and FIG. 13. As shown by the arrow (→) in the drawing, the cooling is performed via the cooling air passage 24. A plurality of cooling / cooling air outlets 33 provided on a wall surface in the chamber 2 discharges into the refrigeration room 2 and cools food and foodstuffs stored in the pockets 10 and shelves 11 in the refrigeration room 2 while cooling the refrigeration room. The cooling air is returned to the cooling air passage 24 from the cooling air inlet 32 provided on the bottom surface of the inside 2, and follows the path to the cooler 21 again.

FIG. 13 is a vertical cross-sectional view of the flow of cooling cold air circulating in the refrigerator compartment 2 when viewed from the side. The cooling cold air discharged from the cooling cold air discharge port 33 is used for foods and foodstuffs placed on each shelf 11. Is cooled, and the food and foodstuffs stored in the pocket 10 are returned to the cooling / cooling air inlet 32 provided on the bottom surface of the refrigerator compartment 2 while being cooled. In the present example, the temperature detecting element 31 of the refrigerator compartment 2 is disposed substantially at the center of the inner wall surface on the shelf 11 side of the refrigerator compartment 2.

FIG. 14 is a cross-sectional view of the flow of the cooling air circulating in the refrigerator compartment 2 as viewed in plan. The cooling air that cools the food and food placed on each shelf 11 is stored in the pocket 10. FIG. 3 is a diagram showing a state in which the food or food material flows in the direction of the refrigerated compartment 2 and the temperature inside the refrigerated compartment 2 is detected by a temperature detecting element 31 disposed on the inner wall surface in the refrigerated compartment 2.

FIG. 15 is a longitudinal sectional view of a mounting portion of the temperature detecting element 31 for detecting the temperature of the cooling air in the refrigerator compartment 2. Refrigeration chamber 2 forming this flow of cooling cold air
In the temperature control method, the temperature of the air on the inner wall surface of the refrigerator compartment 2 is measured by a temperature detecting element 31 disposed on the left or right side wall surface or the inner wall surface inside the refrigerator compartment 2, and the ON / OFF of the compressor 19 is measured.
An OFF operation is commanded. At the same time, by adjusting the opening / closing amount of the cool air amount adjusting damper 25 provided in a part of the cool air passage 24, the air temperature in the refrigerator compartment 2 is further increased by adjusting the opening / closing amount. Is to be maintained.

More specifically, when an increase in the air temperature in the refrigerator compartment 2 is detected due to an increase in the number of foods or foodstuffs or the number of times of opening and closing, the compressor 19 is turned on to open the cold air volume adjustment damper 25 and open. Conversely, when the temperature of the air in the refrigerator compartment 2 decreases due to excessive cooling, the compressor 19 is turned off and the damper 25 for adjusting the amount of cold air is closed.

[0011]

FIG. 12 is a front view showing the flow of cooling cold air in the refrigerator compartment 2, FIG. 13 is a longitudinal sectional view showing the flow of cooling cold air in the refrigerator compartment 2, and FIG. When observing the flow of cooling cold air in the refrigerator compartment 2 as a conventional example in a cross-sectional view showing the flow of cool air, it can be seen that the air temperature in the refrigerator compartment 2 cannot be sufficiently detected. The same applies to the configuration example of the cooling / cooling air louver control of FIG.

That is, most of the cooling air discharged from the cooling air discharge port 33 provided on the inner wall surface in the refrigerator compartment 2 has a flow for sufficiently cooling the food and foodstuffs stored in the shelf 11 or the pocket 10. Although formed, the temperature sensing element 3
1 is located on the inner wall surface inside the refrigerator compartment 2, so that the cooling air flowing out along the inner wall surface immediately after being discharged from the cooling air outlet 33 or the cooling air stagnating on the inner wall surface This means that the air temperature of the cooling air that cools the shelves 11 and the pockets 10 that actually store the food is not detected.

Therefore, new foods and ingredients are stored in the refrigerator compartment 2
It cannot respond immediately to the change in the heat load when it is put into the shelf 11 or a part of the pocket 10 in the inside of the cooler 2.
1. A situation in which only the temperature of the air cooled by the forced-air ventilation fan 22 and sent to the cool air ventilation passage 24 by the forced air ventilation fan 22 and just discharged into the refrigerator compartment 2 or the air temperature staying on the inner wall surface is captured. It is in. That is, the refrigerator compartment 2
This is because the control is not to control the cooling immediately in response to the change in the heat load in the inside, but to control the temperature of the cooling cold air discharged into the refrigerator compartment 2 to be constant.

For this reason, when foods or foodstuffs are newly introduced into the shelf 11 or a part of the pockets 10 in the refrigerator compartment 2 or when the heat load is partially changed, control for rapidly cooling is performed. From the viewpoint of keeping freshness by cooling the food and ingredients, which is the original purpose of the refrigerator,
It is a control method that needs improvement from the viewpoint of energy saving.

A specific description will be given of an example of the conventional basic configuration shown in FIGS. 12 to 14. For example, when a pot containing prepared foods is put into a part of the shelf 11, the load naturally becomes a heat load. Although the temperature of the surrounding air is raised, the flow of the cooling cold air is formed from the inner wall surface to the refrigeration revolving door 6 side, and flows into the cooling cold air suction port 32 provided on the bottom wall surface in the refrigeration compartment 2. The material itself is placed in the flow of cooling cold air and cooled.

However, since the temperature detecting element 31 deeper than the pan, that is, on the windward side of the cooling air cannot catch the rise of the air temperature around the pan, the cooling air is supplied to the portion where a large heat load exists. It also means that it has not been able to respond to the need to increase the cooling rate to reduce the freshness degradation and the need to reduce the power consumption burden by shortening the cooling time of the food to be cooled. .

The same applies to the case where a 2 liter plastic bottle for beverages is placed in the pocket 10. The plastic bottle left at room temperature is removed from the pocket 10 in the refrigerator compartment 2.
, The heat load of the refrigerator compartment 2 becomes large. Also in this case, similarly to the case of the above-mentioned pan, the temperature detecting element 31 on the windward side of the cooling cold air cannot catch the rise in the air temperature around the 2-liter plastic bottle. The plastic bottle itself is naturally cooled while the cold air that has cooled the food and ingredients placed on the shelves 11 in each stage flows along the pocket storage section from top to bottom. As described above, when a beverage or the like is newly introduced, a large heat load is generated.Therefore, there is a need to collect cooling cold air in this part to cool quickly, and to reduce a cooling time to reduce a burden of power consumption. They have not been able to meet their power needs.

Further, as a practical problem in manufacturing, it can be pointed out that the temperature sensing element 31 is difficult to use and the quantity to be used. First, in the usage method, there is a point that the temperature detecting element 31 is not disposed in the flow of the cooling air, and when the load fluctuation is to be detected promptly, further downwind in the flow of the cooling air. The point is that the temperature detecting element 31 should be disposed on the side.

[0019]

SUMMARY OF THE INVENTION To summarize the problem, the construction of means for quickly cooling newly stored foods and foodstuffs to a predetermined temperature so that the inside of the refrigerator compartment 2 can have a uniform air temperature environment is constructed. It is. Further, it is a problem related to a detection method for quickly detecting a temperature rise in the refrigerator compartment 2 due to the input of a target food or food material, its configuration, and a method for controlling the flow of cooling and cool air.

First, there are problems relating to a detection method for quickly detecting a temperature rise in the refrigerator compartment 2 due to the input of a target food or foodstuff, a configuration thereof, and a method of controlling the flow of cooling / cooling air.
A clue for solving the problem can be found at the position where the conventional temperature detecting element 31 is disposed.

FIGS. 12 to 1 shown as basic forms of a conventional example.
As is clear from the configuration example of FIG. 5, in order to keep the temperature of the air in the refrigerator compartment 2 at a predetermined temperature, it is necessary to always keep track of the temperature change of the cooling cold air. The method of arranging the temperature detecting element 31 on the side is ideal. A method of arranging the temperature detecting element 31 at the front of each shelf 11 or at the bottom of the pocket 10 is also conceivable. However, there is a problem in manufacturing and use, and the temperature change of the cooling and cooling air does not always become a hindrance. What is captured is inside or near the cooling cold air inlet 32 where the cool air that has cooled the refrigerator compartment 2 converges and returns to the cooler 21. Fortunately, the cooling / cooling air suction port 32 has an opening extending in the left-right width direction of the bottom wall surface in the refrigerator compartment 2, which is a convenient form for disposing the temperature detecting element 31.

FIG. 12 is a front view showing the flow of cooling cold air in the refrigerator compartment 2 shown in FIG. 12 as a conventional example, FIG. 13 is a longitudinal sectional view showing the flow of cooling cold air in the refrigerator compartment 2, and FIG. As described in the cross-sectional view showing the flow of the cool air, the cool cool air is discharged from the plurality of cool cool air discharge ports 33 provided on the inner wall surface in the refrigerator compartment 2, and the food or the like placed on each shelf 11 is cooled. While cooling the food, it flows down from the tip of each shelf 11 into the pocket 10 provided in the refrigerated revolving door 6, and a band-shaped cooling / cooling air flow that falls from the upper part to the lower part while cooling the food and the food stored in the pocket 10 is formed. Furthermore, a path is formed from the cooling cold air inlet 32, which has an opening in the left-right width direction of the bottom wall surface in the refrigerating compartment 2, to return to the cooler 21 via the cool air ventilation passage 24.

It is clear that when a heat load is applied to a part of the flow of the cooling cool air, the temperature of the cooling cool air on the lee side of the charge rises. Fortunately, since a belt-like flow of cooling air is formed, it is easy to arrange a plurality of temperature sensing elements 31 in the cooling air inlet 32 provided on the bottom surface in the refrigerator compartment 2. It is a means that can detect the position where the heat load is applied to and the amount of the heat load.

Next, a method for quickly cooling newly stored foods and foodstuffs to a predetermined temperature is described. The position at which a heat load is easily applied and the heat load amount are detected. Having found a possible means, a method of discharging cooling cold air toward the heat load can be considered.
In the conventional cooling / cooling air passage 24, two left and right cooling air passages 24 penetrating vertically are formed in the inner wall of the refrigerator compartment 2, and the cooling / cooling air discharge port 34 discharging into the refrigerator compartment 2 is provided at each stage. Is provided for each of the shelves 11, so that the above-described heat load position and heat load amount detection means can detect the position in the left-right width direction when the heat load is applied to the shelf 11. , It is impossible to detect the position in the front-back (depth) direction.

However, in consideration of the band-like flow of cooling cold air from the inner wall surface to the front surface of the refrigerator compartment 2 and diffusion on the shelf 11, the initial problem is that if the position in the left and right width direction with respect to the heat load can be detected. It can be seen that this can be a solution.

Therefore, in order to detect the position of the heat load in the left-right width direction, a front view showing the flow of cooling cold air in the refrigerator compartment 2 of FIG. 2 and a vertical cross section showing the flow of cooling cold air in the refrigerator compartment 2 of FIG. As shown in FIG. 5 and FIG. 5 as a cross-sectional view showing the flow of cooling cold air in the refrigerator compartment 2, a plurality of temperature sensing elements 31 are provided at the left and right ends and the center at the opening end of the cooling cold air suction port 32 or in the vicinity thereof. In such a case, the measured value of the temperature detecting element 31 on the leeward side where the thermal load is applied changes, so that the position of the thermal load can be specified.

Therefore, if the cooling / cooling air discharge port 33 is provided with a mechanism for discharging the cooling / cooling air toward the specified position, it becomes a means for solving the initial problem. Refrigeration room 2 of FIG.
In the front view showing the flow of the cooling / cooling air in the refrigerator, and in the cross-sectional view showing the flow of the cooling / cooling air in the refrigerator compartment 2 in FIG.
2 is shown as a form having a series of openings connected in the left-right width direction, but is formed as a cooling / cooling air suction port 32 having a plurality of openings, and a temperature is set in or near each cooling / cooling air suction port 32. When the detection element 31 is provided, the flow of the cooling cold air to the cooling cold air suction port 32 can be narrowed, so that the method for forming the cooling cold air suction port 32 can further improve the detection sensitivity.

Next, a mechanism for discharging cooling cold air toward the specified position is premised on a configuration that does not hinder the cooling performance of maintaining the temperature of the refrigerated storage environment in the refrigeration compartment 2. Therefore, as a conventional means premised on the flow of cooling cold air, first, the configuration of the cold air ventilation passages 24 provided on the left and right inside the back wall of the refrigerator compartment 2 is left, and the left and right widths of the back wall inside the refrigerator compartment 2 are left. A new cool air passage 24 is formed substantially at the center in the direction from the bottom to the top, so that the cool cold air for cooling the refrigerator compartment 2 can be forcibly circulated.

As shown in FIG. 4 as a longitudinal sectional view of the louver 29 showing the flow of the cooling air in the refrigerator compartment 2, the newly provided cooling air passage 24 is provided with cooling air corresponding to each stage of the shelf 11. And a circulating fan motor 28 for circulating the cooling air in the refrigerating compartment 2 is provided below the louver 29 as a means for forcibly circulating the above described louvers 29 provided with discharge ports. The louver 29 that rotates left and right is designed to rotate using a louver driving motor 30 provided above the louver 29 as a driving source.

In such a configuration, the flow of the cooling / cooling air is controlled by using a control method as shown in the control flow chart of the cooling / cooling air shown in FIG. The operation principle will be described with reference to the control flow chart of the cooling / cooling air shown in FIG. 7 using a case where a thermistor is used as the temperature detecting element 31 as an example. The resistance value of the thermistor (there may be more than one) at the time of detection is TCx,
When the resistance value of the thermistor (there is a plurality of thermistors) other than the thermistor when the temperature decrease or the temperature rise is detected is expressed as TCn, when the set temperature and the detected temperature match, the louver 29 is turned off. While stopping the rotation,
The rotation of the circulation fan motor 28 is also stopped.

When the detected temperature deviates from the set temperature, the louver 29 is rotated, and a thermistor (resistive value: resistance value) when it is detected that the detected temperature is higher than the set temperature (resistance value: TCo). In the case of TCx), the circulation fan motor 28 is rotated only when the louver 29 is oriented in the direction in which the thermistor exists. At this time, if the louver 29 is oriented in the direction in which the thermistor (resistance value: TCn) other than the thermistor (resistance value: TCx) at the time of detecting that the detected temperature is high, the circulation fan motor 28 To stop.

Conversely, if the thermistor (resistance value: TCx) detects that the detected temperature is lower than the set temperature (resistance value: TCo), the louver 29 faces in the direction in which the thermistor exists. Only when it is, the circulation fan motor 28 is stopped. At this time, if the louver 29 is oriented in a direction in which a thermistor (resistance value: TCn) other than the thermistor (resistance value: TCx) at the time of detecting that the detection temperature is low, the circulation fan motor 28
This is a control for performing an operation of rotating. FIG. 8 shows the relationship between the detected temperature and the operation of the louver 29 and the circulation fan motor 28. When the present control is applied, the set value is naturally given a value in consideration of the variation of the thermistor element.

[0033]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to a sectional view of a refrigerator main body 1 shown in FIG. Each storage room has the same configuration as the conventional example of FIG. 11, and is composed of a refrigerator room 2, a vegetable room 3, and a freezer room 4 from the top,
The refrigerator compartment 2 has a refrigerating revolving door 6 held by a hinge mechanism 5, the vegetable compartment 3 is configured as a storage mode having a vegetable drawer door 7, and the freezer compartment 4 has an upper freezer drawer door 8 and a lower freezer drawer door 9. ing. A plurality of pockets 10 provided on the side of the refrigerated revolving door 6 serving as a storage section for refrigerated food, and a plurality of shelves 11 provided on the side of the refrigerator body 1 are provided in the refrigeration room 2. At the lowermost part of the inside, a low-temperature storage room 18 having a temperature lower than the refrigeration temperature constituted by a drawer container 13 having a lid 12 on the front surface is provided.

At the back wall of each shelf 11 of the refrigerator compartment 2,
A louver 29 is provided which has a discharge port for forcibly circulating the cooling and cool air discharged into the refrigerator compartment 2, and a louver 29 rotating left and right is provided. Is provided below the louver 29. Furthermore,
A louver driving motor 30 for rotating the louver 29 is disposed in the upper rear wall of the louver 29. Refrigerated foods and chilled foods such as beverages, seasonings, and prepared foods stored in the refrigeration compartment 2 are classified and stored in respective storage units in terms of size, amount, shape, usability, and the like.

The inside of the vegetable compartment 3 is composed of a lower vegetable container 15 drawn out by the vegetable drawer door 7 and an upper vegetable container 14 disposed above the lower vegetable container 15. For this reason, they are classified and stored in each storage unit. The inside of the freezer compartment 4 includes an upper freezing container 16 drawn out by an upper freezing drawer door 8 and a lower freezer container 17 drawn out by a lower freezer drawer door 9, and the size, amount, and shape of the stored frozen foods and frozen ingredients. , And are stored in the respective storage sections in terms of ease of use.

In the configuration of each storage chamber described above, the compressor 1
A machine room 20 in which a refrigerator 9 and the like are disposed is disposed at a lower rear portion of the freezing room 4, and a cooler 21 is disposed so as to straddle the rear surface of the freezing room 4 and the rear surface of the vegetable room 3. It is arranged above the machine room 20 via a part of the heat insulating material to be formed.

The refrigeration cycle for cooling the inside of the refrigerator body 1 is provided so as to straddle the compressor 19 provided in the machine room 20 at the lower rear part of the refrigerator body 1 and the back of the freezing room 4 and the back of the vegetable room 3. The cooler 2 is constituted by the cooled cooler 21.
The fan 23 for forced ventilation is rotated by a fan driving motor 23 provided on the upper part of the refrigerator 1 to circulate the air in the refrigerator body 1 and promote heat exchange in the cooler 21 to remove the cooled cool air. It is circulated through the cool air passage 24 into the refrigerator body 1.

Below the cooler 21, a defrosting tube heater 2 is provided.
6, and a gutter 27 for defrosting water is further provided below. The temperature of each storage room provided in the refrigerator main body 1 is maintained at a predetermined temperature by the opening and closing operation of the cool air amount adjusting damper 25 provided in a part of the cool air passage 24. Control has been made.

The flow of the cooling cold air circulating in the refrigerator compartment 2 according to the present invention will be described with reference to the front view of FIG. 2. As shown by the arrow (→) in the drawing, the cooling compartment 2 passes through the cold air passage 24. A plurality of cooling cold air outlets 33 provided on the left and right sides of the inner rear wall are discharged into the refrigerator compartment 2 and refrigerated while cooling food and foodstuffs stored in the pockets 10 and shelves 11 in the refrigerator compartment 2. Cooling / cooling air inlet 32 provided on the bottom wall surface in chamber 2
Then, it is returned to the cool air passage 24 and follows the path to the cooler 21 again.

FIG. 3 is a vertical cross-sectional view of the flow of cooling cold air circulating in the refrigerator compartment 2 as viewed from the side. The cooling cold air discharged from the cooling cold air discharge port 33 is the food or foodstuff placed on each shelf 11. To cool the food and foodstuffs stored in the pockets 10 while cooling the cold air inlet 3 provided on the bottom of the refrigerator compartment 2.
2 is shown.

FIG. 4 is a longitudinal sectional view of the louver 29 when the flow of the cooling air circulating in the refrigerator compartment 2 is viewed from the side. The cooling air discharged from the cooling air outlet 33 through the cooling air passage 24 is shown in FIG. , Cool the food and ingredients placed on each shelf 11,
While cooling the food and ingredients stored in the pocket 10,
The circulating fan motor 28 enters the louver 29 from a suction port provided below the louver 29 serving as a circulation path, and a plurality of discharge ports provided on a surface of the louver 29 exposed in the refrigerator compartment 2. The state of discharge and circulation is shown.

FIG. 5 is a cross-sectional view of the flow of the cooling air circulating in the refrigerator compartment 2 in a plan view. The cooling air obtained by cooling the food and food on each shelf 11 is stored in the pocket 10. Sensing element 3 disposed at a cooling / cooling air suction port 32 provided on a bottom wall surface in the refrigerator compartment 2.
1 shows a state in which the temperature of the cooling cold air sucked into the cooling cold air suction port 32 is detected.

FIG. 6 is a cross-sectional view of a mounting portion of the temperature detecting element 31, in which a temperature detecting portion is disposed in a cooling air inlet 32 forming a return passage for cooling air. The method of controlling the temperature in the refrigeration compartment 2 that forms the flow of the refrigeration compartment is as follows: As shown in the control flow chart of the refrigeration compartment in FIG. A plurality of temperature sensing elements 31 arranged are used to measure the temperature of the air that cools the refrigerator compartment 2 and returns to the cooler 21, and serves as a temperature control index for keeping the refrigerator compartment 2 at a predetermined temperature.

The air temperature in the refrigerator compartment 2 is calculated and controlled based on the temperatures detected by the plurality of temperature detecting elements 31 to instruct the ON / OFF operation of the compressor 19, but at the same time. By adjusting the opening / closing amount of the damper 25 for adjusting the amount of cool air provided in a part of the cool air passage 24, an adjusting operation is further performed to maintain the air temperature in the refrigerator compartment 2. Specifically, when an increase in the air temperature in the refrigerator compartment 2 is detected due to an increase in the number of opening or closing of food or foodstuffs or the like, the compressor 19 is turned on to open the damper 25 for adjusting the amount of cold air, and conversely. If the air temperature in the refrigerator compartment 2 drops due to excessive cooling, the compressor 19 is turned off.
Control is performed to close the cool air amount adjusting damper 25 by FF.

The feature of the present invention is not only the above-described control relating to the flow of the cooling air in the refrigerator main body 1 but also the above-described control.
A plurality of temperature detecting elements 31 arranged in or near the cooling air inlet 32 provided on the bottom surface of the refrigerator 2 detect a change in the temperature of the cooling air, and the food and the food stored in the refrigerator 2 can be detected. It is devised to read the temperature information of the foodstuff, and further rotates the direction of the louver 29 provided on the inner wall surface in the refrigerator compartment 2 based on the temperature change detected by the plurality of temperature detecting elements 31. By controlling ON / OFF of the louver driving motor 30 to be circulated and the circulating fan motor 28 for forcibly circulating the cooling and cooling air in the refrigeration room 2, the discharge direction of the cooling and chilling air forcibly circulating in the refrigeration room 2 is determined. The configuration is such that optimum cooling control corresponding to a temperature change in the chamber 2 can be formed.

FIG. 8 is a table showing, as an example, the relationship between the detection state of the temperature detecting element 31, the operation of the louver 29, and the operation of the circulation fan motor 28. FIG. 9 shows a case diagram of the louver operation mode of the cooling control according to the present invention. This example is an example in which three thermistors are disposed as the temperature detecting elements 31 in the cooling air inlet 32 provided on the bottom wall surface of the refrigerator compartment 2, and the return cooling detected by each thermistor is provided. The case where the temperature of the cool air is higher than the predetermined temperature is shown as (H), and the case where it is lower than the predetermined temperature is shown as (L). The relationship between the direction of the discharge port provided in the louver 29 and the flow of the cool cool air is as follows.
The operation mode is shown in FIG.

The flow of the cooling cool air to each storage room according to the present invention described above is summarized as the flow of the cooling cool air of the entire refrigerator, and the cooling path is schematically illustrated in FIG. The cooling air cooled by the cooler 21 is supplied to the forced ventilation fan 2.
2 and distributed to each storage room. Directly discharged to the freezer compartment 4 by the forced ventilation fan 22,
After cooling the inside of the freezer compartment 4, it is returned to the cooler 21.

The cold room 2 and the vegetable room 3 are supplied through a cool air passage 24 via a cool air amount adjusting damper 25.
After cooling both storage compartments, they are returned to the cooler 21. The cooling room 2 is supplied from the cooling air outlet 33 through the cooling air passage 24, cools the inside of the cooling room 2, and is returned to the cooling air inlet 32. The cooling cool air returned to the cooling cool air suction port 32 returns to the cooler 21 through the cool air ventilation path 24, a path for supplying to the vegetable room 3, and a cooling room 2 according to the present invention.
It is distributed to the route which circulates inside.

The cooling cold air circulating in the refrigerator compartment 2 is sent by the circulation fan motor 28 to the louver 29 via the cool air ventilation passage 24, and is cooled together with the cooling cold air discharged from the cooling cold air discharge port 33. The inside is circulated and cooled.

Therefore, the cooling air discharged from the cooling air outlet 33 and the cooling air circulating in the refrigerator 2 are mixed and returned to the cooling air inlet 32.
In order to monitor the temperature fluctuation and the temperature unevenness in the inside, the method of measuring the temperature of the returned cooling air in or near the cooling air inlet 32 is the optimum condition, and the temperature detecting element 3
1 can function effectively, and can be configured as not only the temperature control in the refrigerator compartment 2 but also the measurement device for rotating the louver 29 to quickly cope with a change in the heat load in the refrigerator compartment 2 for cooling. are doing.

[0051]

The summary of the present invention can be summarized as follows. By devising a detection method for quickly detecting a temperature change in the refrigerator compartment 2 and a configuration method thereof, the discharge direction of the cooling / cooling air is controlled according to the position of the heat load. That is, a refrigeration temperature environment capable of promptly coping with temperature fluctuations and fluctuations in the refrigeration compartment 2 has been constructed.

As an effect of the present invention, first, a plurality of temperature detecting elements 31 for detecting the air temperature in the refrigerator compartment 2 are provided.
Is moved from the position of the left or right wall surface or the inner wall surface in the conventional refrigerator compartment 2 to or in the vicinity of the cooling cold air inlet 32 to improve the detection sensitivity, and the air temperature in the refrigerator compartment 2 is reduced. By using the temperature detecting means capable of quickly and accurately detecting the change, an environment capable of performing sufficient and effective temperature management for foods and foodstuffs stored in the refrigerator compartment 2 can be constructed. In other words, the configuration is such that the detection is performed on the leeward side where the flow of the cooling cold air is formed. From the conventional detection of the temperature of the discharged cold air, the food and the ingredients stored in each shelf 11 and each pocket 10 are detected. This is an effect of detecting the temperature of the cooled cold air.

Second, a plurality of temperature sensing elements 31 disposed at or near the cooling / cooling air suction port 32 are distributed and disposed at or near the cooling / cooling air suction port 32, so that temperature fluctuations can be prevented. This is a detection method that can accurately determine the position where the temperature fluctuation has occurred, and at the same time, the discharge direction of the louver 29 for cooling and cooling air that is forcibly circulating in the refrigeration chamber 2 is linked to the detection of the position where the temperature fluctuation occurs. The cooling means can be controlled in such a manner that the cooling means can be rotated right and left.
That is, it was possible to establish an environment in which the temperature of foods and foodstuffs with less temperature fluctuations and unevenness in temperature can be controlled.

That is, when a change such as a temperature rise in a part of the refrigeration temperature environment due to the input of the heat load occurs,
Immediately, the position can be detected, and the outlet of the louver 29 recognizes the temperature detection pattern detected by the plurality of temperature detection elements 31, and the food to be cooled stored in each shelf 11 or each pocket 10 This is an effect of using a means for discharging cooling cold air toward food and foodstuffs.

Thirdly, as an effect derived from the first and second effects described above, since the stored foods and ingredients can be cooled accurately and promptly, excessive cooling can be prevented and cooling can be performed. This is a means for obtaining the effect that power consumption can be reduced because unnecessary cold air waste can be eliminated. Also,
Cooling / cooling air inlet 32 with minimum number of necessary temperature sensing elements 31
Since the components can be arranged in a concentrated manner, it is possible to reduce the cost of parts and the work cost associated with the arrangement, and a great effect can be expected.

[Brief description of the drawings]

FIG. 1 is a sectional view of a refrigerator according to the present invention.

FIG. 2 is a front view showing the flow of cooling cold air in the refrigerator compartment according to the present invention.

FIG. 3 is a longitudinal sectional view showing a flow of cooling cold air in a refrigerator compartment according to the present invention.

FIG. 4 is a cross-sectional view of a louver portion showing a flow of cooling cold air in a refrigerator compartment according to the present invention.

FIG. 5 is a cross-sectional view showing the flow of cooling cold air in the refrigerator compartment according to the present invention.

FIG. 6 is a cross-sectional view of a mounting portion of a temperature detecting element for cooling cold air in a refrigerator compartment according to the present invention.

FIG. 7 is a control flow chart of cooling / cooling air according to the present invention.

FIG. 8 is a correspondence diagram of control and operation of cooling / cooling air according to the present invention.

FIG. 9 is a diagram showing an example of a louver operation mode according to the present invention.

FIG. 10 is a schematic diagram showing the flow of the entire cooling and cooling air according to the present invention.

FIG. 11 is a sectional view of a conventional refrigerator.

FIG. 12 is a front view showing the flow of cooling cold air in a refrigerator room as a conventional example.

FIG. 13 is a longitudinal sectional view showing a flow of cooling cold air in a refrigerator room as a conventional example.

FIG. 14 is a cross-sectional view showing a flow of cooling cold air in a refrigerator room as a conventional example.

FIG. 15 is a sectional view of a mounting portion of a temperature detecting element for cooling cold air in a refrigerator compartment as a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Refrigerator main body, 2 ... Refrigerator room, 3 ... Vegetable room, 4 ... Freezer room, 5 ... Hinge mechanism, 6 ... Refrigerator revolving door, 7 ... Vegetable drawer door, 8 ... Upper freezer drawer door, 9 ... Lower freezer drawer door , 10 ...
Pocket, 11 ... shelf, 12 ... lid, 13 ... drawer container, 14
... upper vegetable container, 15 ... lower vegetable container, 16 ... upper frozen container, 17 ... lower frozen container, 18 ... cold storage room in refrigerator, 19 ... compressor, 20 ... machine room, 21 ... cooler, 22
... Fan for forced ventilation, 23 ... Motor for fan drive, 2
4: cold air passage, 25: damper for adjusting the amount of cold air, 26:
Defroster tube heater, 27 Defrost water gutter, 28 Circulation fan motor, 29 Louver, 30 Louver drive motor, 31 Temperature detection element, 32 Cooling cool air suction port, 33 Cooling cold air discharge exit.

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Kanako Yamada 292, Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture, Japan Digital Media System Division, Hitachi, Ltd. 800, Hitachi, Ltd.Cooling Division (72) Inventor Haruko Ashida 800, Tomita, Ohira-cho, Shimotsuga-gun, Tochigi Prefecture PA03 PA04

Claims (1)

[Claims] In a refrigerator using a cooling method in which cooling cold air is forcibly circulated by a fan, temperature fluctuations and temperature fluctuations of the cooling cold air in the cooling room or near the cooling cold air inlet are detected, and the refrigerator is cooled. A refrigerator comprising means for controlling a discharge amount and a discharge direction of cooling cold air into a room.