JPH1038432A - Damper device for refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a complete opening closing state by deciding whether the opening closing state of a cold air introduction passage is in an incomplete state or not. SOLUTION: It is decided by a temperature detecting part 71 and a temperature setting part 72 whether cold air is fed to a refrigerating chamber 5, and the state of a baffle stored at a memory 73b is read and when a present baffle state is different from a preceding decision result, the baffle is opened or closed. Thereafter, it is decided from a temperature change amount of the refrigerating chamber whether the baffle is correctly opened or closed. When the baffle is not correctly opened or closed, opening or closing operation of the baffle is effected again. The preset number of opening and closing operation times of the baffle is an upper limit. This constitution finally provides a complete state even when opening and closing of a cold air introduction passage is brought into an incomplete state due to a temporary reason.

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 temperature of a refrigerating room by opening a refrigerating room passage to blow cool air from a cool air generating means to the refrigerating room or closing the refrigerating room passage to stop the blowing of the cool air. The present invention relates to a damper device for a refrigerator to be controlled.

[0002]

2. Description of the Related Art Refrigerators having a freezer compartment and a refrigerator compartment (including a vegetable compartment, an ice compartment and the like) are widely used in households.

In such a refrigerator, cold air generated by a compressor, a cooler, or the like, which is a cool air generating means, is guided to the freezing room through a freezing room passage connecting the cold air generating means and the freezing room. The temperature of the freezer compartment and the refrigerating compartment is adjusted by guiding the refrigerating compartment through the refrigerating compartment passage communicating with the refrigerating compartment.

At this time, whether the cool air is guided only to the freezer compartment or to the freezer compartment and the refrigerating compartment is controlled by a damper device provided in the refrigerating compartment passage.

The damper device is provided in the middle of the refrigerating room passage and has a baffle. When the baffle closes the refrigerating room passage, blowing of cool air to the refrigerating room is stopped. By opening the refrigerator, cool air is blown to the refrigerator compartment.

As such a damper device, for example, there is a damper device disclosed in Japanese Patent Publication No. 6-100412, Japanese Patent Publication No. 7-76663, and the like.

FIG. 9 is a partial side sectional view showing the configuration of a damper device disclosed in Japanese Patent Publication No. 6-100412. The damper device 100 includes a refrigerator compartment passage 11.
0, a baffle 101 that abuts on the rib 111 to open and close the refrigerator compartment passage 110, a solenoid 103 that generates a magnetic field by energizing and attracts the plunger 102 by magnetic force, and one end of the baffle 101 The other end is rotatably attached to the plunger 102, and includes an arm 105 provided with a rotating shaft 104 at an intermediate portion thereof, a spring 106 for urging the plunger 102 in a direction to be pulled out from the solenoid 103, and the like. I have.

In such a configuration, when closing the refrigerator compartment passage 110, the power supply to the solenoid 103 is stopped,
The arm 105 is rotated about the rotation shaft 104 (FIG. 9)
Clockwise at). As a result, the baffle 101 attached to the tip of the arm 105 comes into contact with the rib 111, and the refrigerator compartment passage 110 is closed.

On the other hand, when opening the refrigerating compartment passage 110, the solenoid 103 is energized to suck the plunger 102 in the direction of the solenoid 103. This allows arm 1
05 rotates around the rotation shaft 104 (counterclockwise in FIG. 9), and the contact between the baffle 101 and the rib 111 is released.

FIG. 10 is a partial sectional side view showing the configuration of a damper device disclosed in Japanese Patent Publication No. 6-100412. The damper device 200 is connected to the refrigerator compartment passage 21.
0, an arm 205 having one end to which the baffle 201 is fixed and the other end rotatably mounted by a rotation shaft 226, an AC motor 220, and a cam 2.
21, the rotational speed of the AC motor 220 is reduced,
A bevel gear 222 for rotating the arm, a movable bar 224 movably provided on the case 223 and abutting on the cam 221 and the arm 205, a spring 225 for urging the arm 205 in the direction of the movable bar 224, and the baffle 201 include a refrigerator compartment passage 210. The switch 205 includes a switch 227 for detecting that the baffle 201 closes the refrigerator compartment passage 210 when the arm 205 abuts upon closing.

In such a configuration, when closing the refrigerator compartment passage 210, the AC motor 220 is operated to operate the cam 221.
Is rotated, and the moving rod 224 is brought into contact with the portion where the diameter of the cam 221 is minimized (point A in FIG. 10). Thereby, the arm 205 is rotated about the rotation shaft 226 by the spring 225 (clockwise in FIG. 10), and the baffle 20 is rotated.
5 comes into contact with the rib 211. Therefore, the refrigerator compartment passage 210 is closed.

On the other hand, when opening the refrigerator compartment passage 210,
By operating the AC motor 220 to rotate the cam 221,
The moving rod 224 is brought into contact with the point where the diameter of the cam 221 is maximized (point B in FIG. 10). As a result, the arm 205 is pushed by the moving rod 224 to rotate about the rotation shaft 226 (counterclockwise in FIG. 10), and the baffle 201
And the rib 211 is released, and the refrigerator compartment passage 210 is opened.

[0013]

However, in the damper device having the above-described structure, there is a problem that the temperature control of the refrigerating compartment and the freezing compartment cannot be appropriately performed due to the following disadvantages.

That is, Japanese Patent Publication No. 6-10041 shown in FIG.
In the damper device 100 according to No. 2, since the force of the spring 106 is used to close the refrigerator compartment passage 110, the baffle 101 is brought into contact with the rib 111 to blow cool air into the freezer for a long time. In such a case, humid air flows back from the refrigerator compartment to the periphery of the baffle 101, and frost or ice adheres to the baffle 101 and the like.

As a result, even if the baffle 101 is opened in order to blow cool air into the refrigerator compartment, the cold air passage 110 may not be opened due to the icing force due to the force of the spring 106.

On the other hand, in the damper device 200 according to Japanese Patent Publication No. 7-7663 shown in FIG.
Since the opening of the valve 01 is performed by the moving rod 224 pushing the cam 221, there is no problem that the baffle 201 cannot be opened due to icing generated in Japanese Patent Publication No. 6-100412. The switch 227 for detecting the closed state may not operate normally due to icing or the like.

That is, if the switch 227 becomes icy while the refrigerator compartment passage 210 is closed, the switch 227 does not move even if the AC motor 220 is subsequently operated to open the refrigerator compartment passage 210. Regardless of the open / close state of the refrigerator compartment passage 210, a signal indicating that the refrigerator compartment passage is always closed is output.

The opening and closing of the baffle 201 is performed by the AC motor 2.
In the case of performing the rotation at 20, it is generally difficult to rotate the AC motor 220 stably at a low speed, so it is necessary to use a gear having a large reduction ratio.

For this reason, even if the response characteristic of the baffle 201 is reduced and the switch 227 detects that the refrigerating compartment passage is closed and the power supply to the AC motor 220 is stopped, the cam 221 is not removed due to inertia or the like. There is a possibility that the refrigerating room passage will be opened again by continuing the rotation. Therefore, it is difficult to stop the baffle 201 at an appropriate position.

The problem caused by the above-mentioned icing depends on the positional relationship between the rotation axis, the point of action of the spring, and the point of action of the plunger or the moving rod, and it depends on whether the refrigerator compartment passage is in the open state or the closed state. Problems still occur.

Therefore, according to the present invention, even when icing or the like, it is possible to maintain the temperatures of the freezing compartment and the refrigerating compartment properly by always setting the open / close state of the refrigerating compartment passage. An object of the present invention is to provide a damper device for a refrigerator.

[0022]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a refrigerating compartment passage communicating between a refrigerating compartment and a refrigerating compartment that communicates a refrigerating compartment with a refrigerating compartment. A refrigerator compartment passage is provided in the middle of the refrigerator compartment passage, and when blowing cool air to the refrigerator compartment, the refrigerator compartment passage is opened to stop blowing the cool air to the refrigerator compartment. A damper device for a refrigerator-freezer that closes the refrigerator compartment passage, wherein a passage opening / closing unit having a passage opening / closing unit for opening / closing the refrigerator compartment passage and a driving unit for operating the passage opening / closing unit; A temperature detection unit that detects the temperature of the room, a temperature setting unit that sets the temperature of the refrigerator compartment and the freezing room, and a detected temperature and a set temperature from the temperature detection unit and the temperature setting unit.
The drive unit outputs a drive signal to the drive unit by determining whether to open or close the passage opening / closing unit, and performs the refrigeration based on information from the temperature detection unit for a predetermined time. When the temperature change amount of the chamber is smaller than a preset temperature change amount, it is determined that the refrigerating room passage is not completely opened or closed, and the driving signal is re-outputted to the driving unit. And control means provided with a control unit.

That is, when the cool air blown from the cool air fan is guided through the freezer compartment passage communicated with the freezer compartment and is guided into the cold compartment passage communicated with the refrigerator compartment, the cool air is disposed in the middle of the refrigerator compartment passage. In a damper device that controls the blowing of cool air to the refrigerator compartment by opening and closing the refrigerator compartment passage, the refrigerator compartment passage is opened and closed by rotating the passage opening and closing part by the drive unit. Then, the temperatures of the refrigerator compartment and the freezer compartment are detected by the temperature detecting section, and the temperatures of the refrigerator compartment and the freezer compartment are set by the temperature setting section. When the actual temperature of the freezer compartment is lower than the preset temperature of the freezer compartment based on the information from the temperature detecting section and the temperature setting section, and the actual temperature of the refrigerator compartment is lower than the preset temperature of the refrigerator compartment, Outputs a drive signal to the drive unit to close the refrigerating compartment passage, and the actual temperature of the refrigerating compartment is lower than the set temperature of the refrigerating compartment, and the actual temperature of the refrigerating compartment is lower than the set temperature of the refrigerating compartment. If the temperature is high, a drive signal is output to the drive unit to open the refrigerator compartment passage, and if the actual temperature of the freezer compartment is higher than the set temperature of the freezer compartment, the refrigerator compartment passage is closed to perform refrigeration. A drive signal is output to the drive unit to prevent the room air from flowing back to the freezing room. Then, when it is determined that the temperature change amount of the temperature of the refrigerator is smaller than the preset temperature change amount based on the information from the temperature detection unit and the temperature setting unit during the predetermined time, the passage opening / closing unit sets the refrigerator compartment. It is characterized in that it is determined that the passage is not completely opened or closed, and a drive signal is output to the drive unit again.

According to a second aspect of the present invention, the passage opening / closing portion is provided so as to close the refrigerator compartment passage, an opening provided at a central portion of the closing plate, and a rotating shaft. A baffle that contacts the opening by closing the refrigerator compartment path by rotating about the center, and releases the contact with the opening by rotating in the opposite direction to open the refrigerator compartment passage. Wherein the drive unit includes a stepping motor that operates in response to a drive signal to rotate the baffle by a predetermined angle.

According to a third aspect of the present invention, when the control unit outputs a drive signal to the drive unit to open or close the refrigerator compartment passage, the memory stores which of the open and closed states is performed. Determining the current open / closed state of the refrigerator compartment passage based on the memory and determining whether the refrigerator compartment passage should be opened or closed based on information from the temperature detection unit and the temperature setting unit. A CPU that outputs a control signal when the open / closed state of the device is different from the open / closed state to be controlled; and a driver that outputs a drive signal to the drive unit based on the control signal.

According to a fourth aspect of the present invention, the memory is characterized in that the temperature change amount of the refrigerator compartment is set in advance based on information from the temperature detection unit and the temperature setting unit during a predetermined time. The number of times determined to be smaller is stored, and if the number of times determined is greater than a preset number, it is determined that the state is abnormal.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a refrigerator having a damper device according to the present invention, and FIG. 2 is a side sectional view thereof.

The refrigerator-freezer has a main body 1 having a heat insulating structure (hereinafter referred to as a main body). The main body 1 is formed by filling a foam heat insulating material 4 between an inner box 2 and an outer box 3 each having an open front. Have been.

Further, inside the main body 1, a refrigerator compartment 5 having a heat insulating door 9 and a plurality of shelves 11 therein and a freezer compartment 6 having a heat insulating drawer 10 are arranged in order from the top. And a vegetable room 7, which are partitioned by a partition wall 8.

An ice temperature chamber 15 is provided below the refrigerator compartment 5, and a cooler 1 serving as a cool air generating means is provided at the back of the freezer compartment 6.
2 and a cooling chamber 14 in which a fan 13 is provided.

Further, a damper chamber 20 in which a damper device 50 is disposed is provided behind the ice temperature chamber 15.

Then, the low-temperature refrigerant generated by the compressor 28 and the like disposed at the lower part of the refrigerator is circulated to the cooler 12 and the fan 13 is rotated so that the cool air generated in the cooler 12 is passed through the refrigerator passage. The air is sent to the refrigerator compartment 5 and to the freezer compartment 6 through the freezer passage.

The freezer compartment passage is a passage connecting the cooling compartment 14 and the freezer compartment 6 to each other. The refrigerating room passage is composed of a cool air introducing passage 24 for communicating the cooling room 14 with the damper room 20 and a cold air duct 16 connected to the cold air introducing passage 24 in the damper room 20. The cold air supply path 1 for the refrigerator compartment, which is provided at the back of the refrigerator and communicates with the refrigerator compartment 5
8, a cold air supply passage 29 for the vegetable room communicating with the vegetable room 7 and a cool air supply passage 23a and 23b for the ice green room communicating with the ice temperature room 15 are provided.

As described above, the cool air from the cooler 12 is blown to the freezing room 6 and is guided to the damper device 50 in the damper room 20 through the cool air introduction passage 24, and
From 0, the air is sent to the refrigerator compartment 5, the vegetable compartment 7, and the ice temperature compartment 15 through the cooling duct 16.

Next, the damper device 50 will be described in detail with reference to the drawings. FIG. 3 is a perspective view showing the appearance of the damper device 50.

The damper device 50 comprises a passage opening / closing means having a passage opening / closing section 51 and a driving section 56, and a control means 70 having a temperature detecting section 71, a temperature setting section 72 and a control section 73.

The passage opening / closing portion 51 is disposed so as to close the cool air introduction passage 24 and has a closing plate 52 provided with an opening 53, and one end of the closing plate 52 rotates as a rotation shaft 55. Thus, the baffle 54 has a baffle 54 that closes the cool air introduction passage 24 by contacting the opening 53 and opens the cool air introduction passage 24 by moving away from the opening 53.

As shown in FIG. 4, the driving unit 56 applies a rotating force to the rotating shaft 55 of the baffle 54 to rotate the baffle 54, and the stepping motor 59 reduces the rotation speed of the stepping motor 59 to increase the speed. It has a plurality of gears 60 for generating torque, a stopper 61 for regulating the position of the baffle 54, and the like.

FIG. 5 is a block diagram of the control means 70.
The temperature detector 71 of the control means 70 has a refrigerator temperature sensor 71a for detecting the temperature of the refrigerator 5 and a freezer temperature sensor 71b for detecting the temperature of the freezer 6; It has a refrigerator room temperature setter 72a for setting the temperature of the refrigerator compartment 5 and a freezer room temperature setter 72b for setting the temperature of the freezer room 6.

The control section 73 of the control means 70 outputs a control signal to the driver 74 based on signals from the temperature detection section 71 and the temperature setting section 72 to drive the stepping motor 59, and the control performed by the CPU 73a. A memory 73b for storing various data such as information.

With such a configuration, the stepping motor 59 is operated by the signal from the control means 70 to open and close the baffle 54.

The stepping motor 59 is operated by a pulse signal, rotates by an amount corresponding to the pulse signal, and stops when a stop torque is generated by continuously supplying an exciting current when the motor is stopped. Therefore, it is possible to stop quickly.

By using such a stepping motor 59, for example, a means for detecting the open / closed state of the baffle 54 generated when an AC motor is used becomes unnecessary, and the means may become icy and become uncontrollable. Disappears.

Further, since the holding torque can be used to quickly stop, even if a gear or the like is used, the holding torque acts as a brake against the inertia of the gear, so that the baffle 54 can be easily stopped at a predetermined position. Will be possible.

Further, since the driving unit 56 having the above-described structure applies a driving force to the baffle 54 in both the opening operation and the closing operation in the opening and closing operation of the baffle 54, it is possible to prevent the baffle 54 from icing and becoming uncontrollable.

Next, the operation of the control means 70 for controlling the temperature of the freezer refrigerator by controlling the damper device 50 will be described with reference to the flow charts shown in FIGS.

The temperature control of the refrigerator-freezer is roughly divided into three.
Are classified into two processing systems. The compressor 28 and the like are operated, and the baffle 54 is brought into contact with the closing plate 52 to close the cool air introduction passage 24, whereby the cool air is blown only to the freezing compartment 6. And the like, and the contact between the baffle 54 and the closing plate 52 is released to open the cool air introduction passage 24, whereby the cool air is blown to the refrigerating room 5 and the freezing room 6. The third processing system for stopping the operation of the machine 28 and the like to interrupt the generation of cool air will be described separately for convenience.

In step S100, the control means 70 determines the measured temperature Fr of the freezing room 6 based on the signal from the freezing room temperature sensor 71b provided in the freezing room 6 by the set temperature set by the freezing room temperature setter 72b. It is determined whether it is higher than Fs. Depending on the judgment, the subsequent processing is the first or second processing.
It is determined whether to perform the processing system or the third processing system.

That is, if the actually measured temperature Fr is higher than the set temperature Fs, step S is executed to execute the first or second processing system.
The process proceeds to step S102, and when the measured temperature Fr is lower than the set temperature Fs, the process proceeds to step S104 to perform the third processing system.

In step S102, since the measured temperature Fr of the freezer compartment 6 is higher than the set temperature Fs, the compressor 28, the fan 13 and the like are operated, and then the refrigerator compartment temperature sensor 71a provided in the refrigerator compartment 5 in step S103. From the measured temperature Rr of the refrigerator compartment 5 based on the signal from the
The control means 70 determines whether or not it is higher than s. And
When the measured temperature Rr is higher than the set temperature Rs, the process proceeds to the first processing system. On the other hand, when the measured temperature Rr is lower than the set temperature Rs, the process proceeds to the second processing system.

That is, the first processing system is performed when the actual temperature Fr of the freezer compartment 6> the set temperature Fs of the freezer compartment 6 and the actual temperature Rr of the refrigerator compartment 5 <the preset temperature Rs of the refrigerator compartment 5 is satisfied. In the process, the compressor 28 and the like are operated, and the baffle 54 is closed to close the cool air introduction passage 24,
This is a process for blowing cool air only to the freezer compartment 6.

The second processing system is a process performed when the actual temperature Fr of the freezer compartment 6> the set temperature Fs of the freezer compartment 6 and the actual temperature Rr of the refrigerator compartment 5> the set temperature Rs of the refrigerator compartment 5 holds. , The compressor 28 and the like are operated, and the baffle 54 is opened to open the cool air introduction passage 24,
This is a process for blowing cool air to the refrigerator compartment 5 as well.

The third processing system is a processing performed when the actual temperature Fr of the freezing room 6 <the set temperature Fs of the freezing room 6, and stops the compressor 28 and the like to interrupt the generation of cool air. The baffle 54 is closed to close the cool air introduction passage 24, thereby preventing the air in the refrigerator compartment 5 from flowing back to the freezer compartment 6.

If the process has proceeded to the first processing system, step S20
From 0, the process of closing the baffle 54 is performed in step S204.

That is, in step S200, the open / close state of the baffle 54 is determined. If the baffle 54 is in the open state, cool air is also blown to the refrigerator compartment 5. In this case, the process proceeds to step S201, and the baffle 54 is closed.

When the baffle 54 is in the closed state, the cool air is blown only to the freezer compartment 6, and in this case, it is not necessary to close the baffle 54 again, so that step S205 is performed.
Proceed to.

The open / close state of the baffle 54 is determined from the control information of the damper device 50 stored in the memory 73b of the control unit 73. That is, the control unit 73 stores in the memory 73b as control information whether the baffle 54 is opened or closed each time the damper device 50 is controlled.
Is determined.

In step S201, the baffle 54 is closed to lower the temperature of the freezing room 6 to satisfy the set temperature Fs, and the baffle flag S indicating the state of the baffle 54 is reset in step S202.

The baffle flag S is set when the baffle 54 completely closes or opens the cold air introduction passage 24, and is reset in other cases.

Thereafter, in step S203, the CPU 73a
Is set, and in step S204, the control unit 73
Stores the temperature of the refrigerator 5 detected by the refrigerator temperature sensor 71a in the memory 73b.

After proceeding to step S205, it is determined in step S205 whether the baffle flag S has been set.

If the baffle flag S is set, that is, if the baffle 54 is completely closed, the flow returns to step S100, and steps S100 and S10
Loop through the loop until the decision at 3 changes.

When the baffle flag S is not set, that is, when the opening and closing operation of the baffle 54 is started and the predetermined time T
If 1 has not elapsed, the process proceeds to step S206.
Therefore, when the processing from step S201 to step S204 is performed, the process proceeds to step S206 because the baffle flag S has been reset in step S202.

It is determined whether or not the timer set in step S203 has counted a predetermined time T1.

If the predetermined time T1 has not elapsed since the start of the closing operation of the baffle 54, the flow returns to step S100 to go around the loop.

Since the baffle 54 is closed in step S201, the content of the control information stored in the memory 73b indicates that the baffle 54 is closed. Therefore, the loop described in steps S205 and S206 is a loop that proceeds directly from step S200 to step S205.

At step S207, it is determined at this stage that the baffle 54 has reached the closed state. That is, when the closing operation of the baffle 54 is normally performed, the baffle 54 should be in a state of contacting the closing plate 52 and completely closing the cool air introduction passage 24 after the lapse of the predetermined time T1. .

However, for example, the baffle 54 may stop halfway for some reason. In such a case, if a part of the drive signal (pulse signal) from the driver 74 to the stepping motor 59 is lost due to noise or the like, the baffle 54 hits ice or the like during the closing operation, and the speed of the closing operation temporarily decreases. It occurs in some cases.

In such a case, since the cool air is being continuously blown to the refrigerator compartment 5, by detecting the temperature change of the refrigerator compartment 5, it is known whether or not the baffle 54 is completely closed. be able to.

Therefore, a timer is set in step S207, and the current temperature of the refrigerator compartment 5 is detected by the refrigerator compartment temperature sensor 71a in step S208.

At this time, since the temperature of the refrigerator compartment 5 at the time when the closing operation of the baffle 54 is started is stored in the memory 73b in Step S204, the temperature of the refrigerator compartment 5 detected in Step S208 is used as the closing operation of the baffle 54. Is the temperature of the refrigerator compartment 5 after a predetermined time T1 (time measured by the timer set in step S203) from the start of the operation. Therefore, the temperature change amount δTc of the refrigerator compartment 5 can be known from these temperature differences.

The CPU 73b obtains the temperature change amount δTc of the refrigerator compartment 5 from the temperature of the refrigerator compartment 5 detected in steps S204 and S208, and then proceeds to step S20.
The temperature of the refrigerator compartment 5 detected in Step 8 is stored in the memory 73b, and the process proceeds to Step S210.

In the above description, the temperature change amount δTc of the refrigerator compartment 5 is obtained by using the temperature stored in the memory 73b in step S204.
The temperature stored in the memory 73b in step S209 is used.

That is, step S10 is performed by the processing described later.
Since it returns to 0 and goes around the loop, step S208 is performed again.
, The temperature stored in the memory 73b in the previous step S209 is used.

In step S210, step S208
It is determined whether or not the temperature change amount δTc of the refrigerating compartment 5 determined in step (1) is larger than a preset valve closing temperature reference change amount Tdc.

If the temperature change amount δTc is larger than the valve-closed temperature reference change amount Tdc, that is, the baffle 54 is closed so that no cool air is blown into the refrigerator compartment 5, the temperature variation δTc of the refrigerator compartment 5 becomes smaller. If it is larger than the preset valve closing temperature reference change amount Tdc, the process proceeds to step S211.
Proceed to. Steps S210 to S211
When the process proceeds, the normal operation detection number Nr (described later) is counted up each time the process is performed.

On the other hand, when the temperature change amount δTc is smaller than the valve-closed temperature reference change amount Tdc, that is, since the closing operation of the baffle 54 is incomplete, the cold air introduction passage 24 is not completely closed, and thus the refrigerator compartment If the temperature of the refrigeration compartment 5 continues to decrease as a result of the continuous blowing of the cool air to the
Proceed to step S213. When the process proceeds from step S210 to step S213, the abnormal operation detection number Ni (described later) is counted up each time the process is performed.

In step S211, the normal operation detection number Nr, which is the number of times that the temperature change amount δTc of the refrigerator compartment 5 is detected to be larger than the valve closing temperature reference change amount Tdc.
Is greater than a preset normal operation determination number Nrc.

If the number Nr of times of normal operation detection is greater than the number Nrc of normal operation determinations (including the case of equality),
When it is determined that the baffle 54 has completely closed the cool air introduction passage 24, the process proceeds to step S212, in which the baffle flag S is set and the normal operation detection count N is set.
r and the number Ni of abnormal operation detection
Return to 100.

On the other hand, if the normal operation detection frequency Nr is smaller than the normal operation determination frequency Nrc, the process proceeds to step S
Return to 100.

In this case, the above-described processing (however, in step S200, the process does not proceed to step S201, but directly proceeds to step S205) is repeated until the number of times of normal operation detection Nr becomes greater than the number of times of normal operation determination Nrc.

When the process proceeds from step S210 to step S213, it is determined that the baffle 54 has not completely closed the cold air introduction passage 24, so that the process of closing the baffle 54 again is performed in step S213, and step S2 is performed.
Proceed to 14.

In step S214, the number of times that such a malfunction is detected, that is, the temperature of the refrigerating room 5 continues to decrease despite the operation of the baffle 54 to close the cool air introduction passage 24 is detected. It is determined whether or not the abnormal operation detection number Ni is greater than a preset abnormal operation determination number Nic.

When the abnormal operation detection number Ni is greater than the abnormal operation determination number Nic (including the case where the number is equal), the abnormality flag I is set in step S215.
The CPU 73b may notify the user by a warning light or the like (not shown) based on the abnormality flag.

If the abnormal operation detection number Ni is smaller than the abnormal operation determination number Nic, the process returns to step S100, and the abnormal operation detection number Ni becomes equal to the abnormal operation determination number Nic.
Bic 5 in step S213 until ic is reached.
The valve closing of 4 is performed again.

Therefore, even if the baffle 54 is closed, the drive signal of the stepping motor 59 is partially missing due to noise or the like, or the baffle 5
Even if the baffle 54 is not completely closed due to, for example, a temporary deceleration of the operation 4, the baffle 54 can be completely closed by the processing of step S <b> 213.

Thus, the processing of the first group is completed.

Next, the second processing system will be described. If the process has proceeded to the second processing system, the open / closed state of the baffle 54 is first determined in step S300.

When the baffle 54 is in the closed state, since cool air is blown only to the freezer compartment 6, the process proceeds to step S301 and the baffle 54 is opened.

When the baffle 54 is open, cool air is being blown into the refrigerator compartment 5 as well. In this case, there is no need to close the baffle 54 again, so the flow proceeds to step S305.

In step S301, the opening operation of the baffle 54 is started to lower the temperature of the refrigerator compartment 5 so as to satisfy the set temperature Fs, and the baffle flag S indicating the state of the baffle 54 is reset in step S302. .

Thereafter, in step S303, the CPU 73a
Is set, and in step S304, the temperature of the refrigerator compartment 5 detected by the refrigerator temperature sensor 71a is stored in the memory 73b.

When the process proceeds to step S305, it is determined in step S305 whether the baffle flag S is set.

If the baffle flag S is set, that is, if the baffle 54 is completely closed, the flow returns to step S100 to return to steps S100 and S10.
Loop through the loop until the decision at 3 changes.

When the baffle flag S is not set, that is, when the opening operation of the baffle 54 is started and the predetermined time T1
If not, the process proceeds to step S306. Therefore, if the processing from step S301 to step S304 has been performed, the process proceeds to step S306 since the baffle flag S has been reset in step S302.

It is determined whether or not the timer set in step S303 has counted a predetermined time T1. If the predetermined time T1 has not elapsed from the start of the opening operation of the baffle 54, the process returns to step S100 to go around the loop.

In step S307, it is determined that the baffle 54 has reached the open state in this state. That is, when the opening operation of the baffle 54 is performed normally, the baffle 54 should be in a state where the cool air introduction path 24 is completely opened.

However, for example, the baffle 54 may stop halfway for some reason. As such a case, a case where a part of a drive signal (pulse signal) from the driver 74 to the stepping motor 59 is lost due to noise or the like, a case where the baffle 54 hits ice or the like during the opening operation and the valve closing speed temporarily decreases. And so on.

In such a case, since the cool air is continuously blown into the refrigerator compartment 5, the temperature change of the refrigerator compartment 5 decreases. However, when the cold air introduction passage 24 is completely opened compared to when the cold air introduction passage 24 is completely opened, the amount of decrease in the temperature of the refrigerator compartment 5 is small. Therefore, whether or not the baffle 54 is completely opened can be known from the amount of change in the temperature.

Then, a timer is set in step S307, and the current temperature of the refrigerator compartment 5 is detected by the refrigerator compartment temperature sensor 71a in step S308.

At this time, in step S304, the temperature of the refrigerator compartment 5 at the time when the opening operation of the baffle 54 is started is stored in the memory 73b.
Is the temperature of the refrigerator compartment 5 after a predetermined time T1 (time measured by the timer set in step S303) from the start of the opening operation of the baffle 54. Therefore, the temperature change amount δTc of the refrigerator compartment 5 can be known from these temperature differences.

The CPU 73b calculates the temperature change amount δTc of the refrigerator compartment 5 from the temperature of the refrigerator compartment 5 detected in steps S304 and S308, and then proceeds to step S30.
The temperature of the refrigerator compartment 5 detected in Step 8 is stored in the memory 73b, and the process proceeds to Step S310.

In the above description, the temperature change amount δTc of the refrigerator compartment 5 is obtained by using the temperature stored in the memory 73b in step S304.
The temperature stored in the memory 73b in step S308 is used. That is, since the process returns to step S100 and goes around the loop by the processing described later, when returning to step S308 again, the memory 73 is used in the previous step S309.
The temperature stored in b is used.

In step S310, step S308
It is determined whether or not the amount of change in temperature δTc of the refrigerator compartment 5 obtained in step (1) is larger than a predetermined reference value of change during release Tdo.

When the temperature change amount δTc is larger than the valve-opening temperature reference change amount Tdo, that is, when the temperature of the refrigerator compartment 5 decreases as a result of opening the baffle 54 to blow cool air into the refrigerator compartment 5. Proceeds to step S311.
When the process proceeds from step S310 to step S311, the number of times of normal operation detection Nr is performed each time the process is performed.
(To be described later) is counted up.

On the other hand, when the temperature change amount δTc is smaller than the valve-opening temperature reference change amount Tdo, that is, since the opening operation of the baffle 54 is incomplete, the cold air introduction passage 24 is not completely opened, and the like. If the decrease in temperature is not good, the process proceeds to step S313. When the process proceeds from step S310 to step S313, the abnormal operation detection number Ni (described later) is counted up each time the process is performed.

In step S311, it is determined whether or not the number Nr of normal operation detections, which is the number of times that the temperature change amount δTc of the refrigerating compartment 5 is larger than the valve opening temperature reference change amount Tdo, is larger than the number Nrc of normal operation determinations. to decide.

When the number Nr of times of normal operation detection is larger than the number Nrc of normal operation determinations (including the case where the number is equal),
When it is determined that the baffle 54 has completely opened the cold air introduction passage 24, the process proceeds to step S312, in which the baffle flag S is set and the normal operation detection count N is set.
r and the number Ni of abnormal operation detection
Return to 100.

On the other hand, if the number Nr of normal operation detections is smaller than the number Nrc of normal operation determinations, step S
Return to 100.

In this case, the above-described processing (however, in step S300, the process does not proceed to step S301, but directly proceeds to step S305) is repeated until the number of times of normal operation detection Nr becomes greater than the number of times of normal operation determination Nrc.

When the process proceeds from step S310 to step S313, the temperature of the refrigerating compartment 5 is not sufficiently lowered because the baffle 54 does not completely open the cool air introduction passage 24, and the temperature change amount δTc is determined in step S313. It is determined whether or not the temperature is greater than a preset door opening temperature reference change amount Tdd.

When the temperature change amount δTc is larger than the door opening temperature reference change amount Tdd, that is, when the temperature of the refrigerating compartment 5 is reduced, but the decrease amount is smaller than the valve opening temperature reference change amount Tdo. In step S318, the timer of the CPU 73a is set, the temperature of the refrigerator compartment 5 at that time is stored in the memory 73b, and the process returns to step S100.

On the other hand, when the temperature change amount δTc of the refrigerator compartment 5 is smaller than the door open temperature reference change amount Tdd in step S313, the process proceeds to step S314.

Assuming that the amount of decrease in the temperature of the refrigerator 5 is smaller than the reference temperature change Tdd at the time of opening the door, the door 9 of the refrigerator 5 is open, and even if the door 9 is closed, it may be like a watermelon. There is a case where an object with a large heat load is stored in the storage device, or a case where the baffle 54 is not completely released.

Therefore, it is determined in step S314 whether the door 9 is open or closed. At this time, if the door 9 is open or an object with a large heat load is stored, the process proceeds to step S318, and if the door 9 is closed, the process proceeds to step S315.

In step S315, the baffle 54 is opened again, and in step S316, the baffle 54 is opened.
It is determined whether or not the abnormal operation detection number Ni, which is the number of times of performing the opening operation, is greater than the abnormal operation determination number Nic.

If the abnormal operation detection number Ni is larger than the abnormal operation determination number Nic, the abnormality flag I is set in step S317.

If the abnormal operation detection number Ni is smaller than the abnormal operation determination number Nic, the process returns to step S100 and the same processing is performed. At this time, the abnormal operation detection frequency N
If the cool air introduction path 24 is completely opened by the re-operation of the baffle 54 in step S315 before i reaches the abnormal operation determination number Nic, step S317 is performed.
Does not set the abnormal flag I.

With the above, the processing of the second group is completed.

Next, steps S100 to S10
The case where the process proceeds to 4, that is, the case where the third processing system is performed will be described.

In this case, the actual temperature Fr of the freezing compartment 6 has become lower than the set temperature Fs of the freezing compartment 6, and the compressor 28 and the like are stopped in step S104 to interrupt the generation of cool air. In step S105, the baffle 54 is closed to close the cool air introduction passage 24, thereby preventing the air in the refrigerator compartment 5 from flowing back to the freezer compartment 6, and returning to step S100.

[0122]

According to the first aspect of the present invention, after the passage opening / closing portion is driven to open or close the refrigerator compartment passage depending on the state of the refrigerator compartment and the freezing compartment, the temperature of the refrigerator compartment is changed. The open / closed state of the refrigerating compartment passage is determined, and if the open / closed state is determined to be incomplete, the opening / closing operation is performed again by the passage opening / closing portion, so that a desired open / closed state can be always obtained.

According to the second aspect of the present invention, the opening and closing of the baffle is performed by the stepping motor, and the opening and closing of the baffle is also performed by driving the stepping motor. As a result, incomplete closing or opening of the refrigerating room passage is prevented.

Also, since the stepping motor is used, the amount of rotation of the baffle can be controlled, and
Even if a gear or the like is used, it can be stopped instantaneously, and the means for detecting the position of the baffle is not required.

According to the third aspect of the present invention, since the open / close position of the baffle is stored in the memory, there is no need for a means for detecting the current position of the baffle.

According to the fourth aspect of the present invention, the number of times that the temperature change of the refrigerating compartment is detected to be abnormal is stored in the memory, and when the number of times is larger than the preset number, the abnormal state is detected. As a result, it is possible to eliminate the case of a temporary abnormality, thereby improving reliability.

[Brief description of the drawings]

FIG. 1 is a front view of a refrigerator having a damper device according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a perspective view of a damper device.

FIG. 4 is a configuration diagram of a driving unit.

FIG. 5 is a block diagram of a control unit.

FIG. 6 is a flowchart of a control unit.

FIG. 7 is a flowchart of a control unit.

FIG. 8 is a flowchart of a control unit.

FIG. 9 is a side sectional view of a damper device applied to the description of the related art.

FIG. 10 is a side sectional view of a damper device applied to the description of the related art.

[Explanation of symbols]

 Reference Signs List 5 Refrigerator room 6 Freezer room 7 Vegetable room 12 Cooler 13 Fan 14 Cooling room 15 Ice temperature room 16 Cold air duct 18 Cold air supply channel for cold room 19 Damper 20 Damper rooms 23a, 23b Cold air supply channel for ice green room 24 Cold air inlet channel 50 Damper Device 51 Passage opening / closing part 52 Closure plate 53 Opening part 54 Baffle 55 Rotating shaft 56 Drive part 59 Stepping motor 60 Gear 61 Stopper 70 Control means 71 Temperature detection part 72 Temperature setting part 73 Control part 73a CPU 73b Memory 74 Driver

Claims (4)

[Claims] 1. A refrigerating compartment passage communicating between a cold air generating means for generating cold air and a freezing compartment, and a refrigerating compartment passage communicating the cold air generating means with the refrigerating compartment. In the damper device of the refrigerator, the refrigerator compartment passage is opened when blowing cold air to the refrigerator compartment, and the refrigerator compartment passage is closed when blowing the cool air to the refrigerator compartment is stopped. A passage opening / closing unit having a passage opening / closing unit for opening / closing the passage and a drive unit for operating the passage opening / closing unit; a temperature detection unit for detecting the temperatures of the refrigerator compartment and the freezer compartment; A temperature setting unit for setting a temperature, and based on the detected temperature and the set temperature from the temperature detection unit and the temperature setting unit, determine whether the passage opening / closing unit is in a valve-opened or valve-closed state. Drive signal to drive unit Is output, and if the amount of change in the temperature of the refrigerator is smaller than a predetermined amount of change in temperature based on the information from the temperature detector during a predetermined time, the passage of the refrigerator is completely opened. A control unit that determines that the valve or the valve is not closed and re-outputs a drive signal to the drive unit. 2. The passage opening / closing portion is configured to turn around a turning plate around a closing plate disposed to close the refrigerator compartment passage, an opening provided at a central portion of the closing plate, and a turning shaft. A baffle that abuts on the opening to close the refrigerating compartment passage, and releases the contact with the opening by rotating in a reverse direction to open the refrigerating compartment passage. 2. The damper device for a refrigerator according to claim 1, further comprising a stepping motor that operates in response to a drive signal to rotate the baffle by a predetermined angle. 3. A memory for storing which one of the refrigerating compartment passages is opened and closed when the control unit outputs a driving signal to the driving unit to open and close the refrigerating compartment passage, and based on the memory, The current open / close state of the room passage is determined, and the open / close state of the refrigerator passage is determined based on information from the temperature detection unit and the temperature setting unit. The refrigerator according to claim 1 or 2, further comprising a CPU that outputs a control signal when the state is different, and a driver that outputs a drive signal to the drive unit based on the control signal. 4. The number of times the memory determines that the temperature change of the refrigerator compartment temperature is smaller than a predetermined temperature change based on information from the temperature detection unit and the temperature setting unit during a predetermined time. The damper device for a refrigerator according to any one of claims 1 to 3, wherein an abnormal state is determined when the number of determinations is greater than a preset number.