JPH1038433A - Temperature control device for refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent adhesion of frost and ice to a damper device as a result of humid air reversely flowing from a refrigerating chamber to a damper device when a compressor is stopped. SOLUTION: When the measured temperature in a refrigerator is decreased to a value lower than a set temperature, opening closing state of a baffle is decided at a step 8 to stop a compressor and the like. When the baffle is closed, an advance to a step S11 is effected. When the baffle is opened, closing operation of the baffle is effected at a step S9 and it is decided at a step S10 whether closing operation is completed. When closing operation is not completed, operation is returned back to a step S1 and operation to make a round of a loop is effected until closing operation of the baffle is completed. Meanwhile, when closing operation of the baffle is completed, an advance to a step S11 is effected. As noted above, after the baffle is closed, the compressor and a fan are stopped at a step S11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cool air generating means and a damper for preventing the humid air from a refrigerating room from flowing back to a damper apparatus when a cold air generating means is stopped so that frost or the like does not adhere to the damper apparatus. The present invention relates to a temperature control device for a refrigerator which controls the device.

[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 passageway and having a baffle. By closing the chamber passage, the blowing of cool air to the refrigerator compartment is stopped, and the baffle opens the refrigerator compartment passage to blow cool air to the refrigerator compartment.

[0005] When it is not necessary to blow cool air into both the refrigerator compartment and the freezer compartment, the refrigerator compartment passage is closed and the compressor and the fan are stopped.

[0006]

However, in the above-described configuration, when the generation of the cool air is stopped after blowing the cool air into the refrigerator compartment, the stop of the compressor and the fan and the closing operation of the baffle are performed simultaneously. Therefore, there were the following problems.

That is, even if the damper device is operated to close the refrigerating compartment passage, a predetermined time is required for the baffle to completely close the refrigerating compartment passage, but the compressor or the like does not generate a stop signal (power supply). During the closing operation of the baffle, the humid air in the refrigerator compartment flows back through the damper device and reaches the baffle surface whose temperature is lower than that of the refrigerator compartment and the driving device for operating the baffle. May frost or icing.

In such a case, there is a possibility that abnormal operation of the baffle may be caused. Therefore, it has been proposed to prevent frost or icing using a heater or the like. There has been a problem that the cost is increased and the power supplied to the heater increases the running cost.

Therefore, the present invention is to prevent the air in the refrigerating compartment from flowing back and to prevent frost or ice from adhering to the surface of the faffle even if the generation of the cool air is stopped after blowing the cold to the refrigerating compartment. Accordingly, it is an object of the present invention to provide a refrigerator / freezer temperature control device which makes it possible to provide an inexpensive refrigerator / freezer without requiring a heater or the like and to provide a refrigerator / freezer having a low running cost.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention controls a cold air generating means for generating cold air, a freezer compartment passage communicating the cold air generating means with the freezing chamber, and the cold air generating means. A refrigerator compartment passage communicating with the refrigerator compartment, and provided in the middle of the refrigerator compartment passage, when blowing the cool air to the refrigerator compartment, open the refrigerator compartment passage,
A temperature setting unit configured to set a temperature of the freezing room, wherein the temperature setting unit sets a temperature of the freezing room, wherein the temperature control unit controls a damper device that closes the refrigerating room passage when the blowing of cool air to the cold room is stopped. A temperature detector for detecting the temperature of the
When the temperature of the freezer compartment detected by the temperature detection unit is lower than the temperature set by the temperature setting unit, the damper device is operated to close the refrigerator compartment passage, and then the cold air generation unit is operated. And a control unit for stopping.

That is, when the temperature of the freezing room becomes lower than the set temperature, the generation of cool air is stopped. At this time, the refrigerating room passage is closed, and then the cool air generating means is stopped.

[0012]

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 has a main body 1 (hereinafter referred to as a main body) having a heat insulating structure, and 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 surface. Have been.

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 inside the main body 1 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 at a lower portion of 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.
A cooling chamber 14 provided with a fan 2 and 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-freezer circulates through the cooler 12 and rotates the fan 13 to generate cool air.
It is generated in 2 and is blown to the refrigerator compartment 5 through the refrigerator compartment passage and is blown to the freezer compartment 6 through the freezer compartment passage.

The freezer compartment passage is a passage connecting the cooling room 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. And a refrigerator compartment passage 18 communicating with the refrigerator compartment 5, a vegetable compartment passage 29 communicating with the vegetable compartment 7, and ice temperature chamber passages 23a and 23b communicating with the ice temperature chamber 15.

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 introducing passage 24, where the cool air is introduced.
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 drive section 56 applies a rotating force to a rotating shaft 55 of the baffle 54 to
, A plurality of gears 60 for generating a large torque by reducing the rotation speed of the stepping motor 59, 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 a driver 74 comprising a stepping motor driver 74a and a cool air generator driver 74b based on signals from the temperature detecting section 71 and the temperature setting section 72. Stepping motor 59, compressor 28, fan 13
And a memory 73b for storing various data such as control information performed by the CPU 73a.

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.

By the way, the stepping motor 59 is operated by a pulse signal and rotates by an amount corresponding to the pulse signal. When the stepping motor 59 is stopped, an exciting current is kept flowing to generate a holding torque, thereby enabling a quick stop. ing.

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

Further, since it is possible to quickly stop by the holding torque, 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. become.

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

Next, the operation in which the control means 70 controls the damper device 50 to control the temperature of the refrigerator will be described with reference to the flowchart shown in FIG.

In step S1, the control unit 73 determines the measured temperature Fr of the freezer compartment 6 based on the signal from the freezer compartment temperature sensor 71b provided in the freezer compartment 6,
It is determined whether the temperature is higher than the set temperature Fs set in 2b.

That is, when the measured temperature Fr is higher than the set temperature Fs, the process proceeds to step S2, and when the measured temperature Fr is lower than the set temperature Fs, the process proceeds to step S8.

In step S2, the measured temperature F of the freezer compartment 6
r is higher than the set temperature Fs, the control unit 73
The control signal is output to the cool air generator driver 74b to operate the fan 8 and the fan 13 and the like.
3, a refrigerator room temperature sensor 71 provided in the refrigerator room 5
Based on the signal from a, it is determined whether the measured temperature Rr of the refrigerator compartment 5 is higher than the set temperature Rs.

If the measured temperature Rr is higher than the set temperature Rs, the process proceeds to step S4. If the measured temperature Rr is lower than the set temperature Rs, the process proceeds to step S6.

In step S4, the open / closed state of the baffle 54 is determined. If the baffle 54 is open, the baffle 54 is opened and cool air is being blown into the refrigerator compartment 5, so the process proceeds to step S5 and the baffle 54 is opened. Closed.

On the other hand, when the baffle 54 is closed and the cool air is blown only to the freezing compartment 6, the baffle 54 is closed again.
It is not necessary to close, so the process returns to step S1.

The open / closed 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.

On the other hand, when the process proceeds to step S6, the open / closed state of the baffle 54 is determined. When the baffle 54 is in the closed state, since cool air is blown only to the freezing compartment 6, the process proceeds to step S7 and the baffle 54 is opened.

When the baffle 54 is open, cool air is being blown into the refrigerating compartment 5, and in this case, it is not necessary to close the baffle 54 again, so that the flow returns to step S1.

Next, when the process proceeds from step S1 to step S8, the actual temperature Fr of the freezer compartment 6 becomes lower than the set temperature Fs of the freezer compartment 6, that is, the measured temperature of the freezer compartment becomes lower than the set temperature. If so, the open / closed state of the baffle is determined in step 8 to stop the compressor 28 and the like.

If the baffle 54 is closed, the process proceeds to step S11. If the baffle 54 is open, the closing operation of the baffle 54 is performed in step S9, and it is determined whether the closing operation is completed. It is determined in step S10.

If the closing operation has not been completed, the flow returns to step S1 to loop around until the closing operation of the baffle 54 is completed. On the other hand, when the closing operation of the baffle 54 has been completed, the process proceeds to step S11.

After closing the baffle 54 in this manner,
In step S11, the compressor 28, the fan 13, and the like are stopped.

As described above, the compressor 28 and the fan 1
When 3 and the like are stopped, the compressor 28 and the like are stopped after the cold air introduction path 24 is closed in advance, so that the moist air from the refrigerator compartment 5 causes frost and ice to adhere to the surface of the baffle 54 and the like. Can be prevented.

[0046]

According to the present invention, when the cold air generating means is stopped, the refrigerating chamber passage is closed prior to the stop of the cold air generating means. It has become possible to prevent the humid air from flowing back and forming frost and ice on the damper device and the like.

For this reason, a heater or the like for preventing frost or ice from adhering becomes unnecessary, so that an inexpensive refrigerator-freezer can be provided and a refrigerator-freezer having a low running cost can be provided.

[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.

[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 Refrigerator room passage 19 Damper 20 Damper rooms 23a, 23b Ice temperature room passage 24 Cold air introduction path 50 Damper device 51 Passage opening / closing section 52 Closing plate 53 Opening 54 Baffle 55 Rotating shaft 56 Driving unit 59 Stepping motor 60 Gear 61 Stopper 70 Control means 71 Temperature detecting unit 72 Temperature setting unit 73 Control unit 73a CPU 73b Memory 74 Driver 74a Stepping motor driver 74b Cold air generation Device Driver

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Kakinuma 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.

Claims (1)

[Claims] A refrigeration compartment passage communicating between the refrigeration compartment and the refrigeration compartment, and a refrigeration compartment passage communicating the refrigeration compartment with the refrigeration compartment; and , Provided in the middle of the refrigerator compartment passage,
A temperature control device for a refrigerator, which controls a damper device that opens the refrigerator compartment passage when blowing cold air to the refrigerator compartment and closes the refrigerator compartment passage when stopping the blowing of cool air to the refrigerator compartment. A temperature setting unit that sets the temperature of the freezing room; a temperature detecting unit that detects the temperature of the freezing room; and a temperature of the freezing room detected by the temperature detecting unit, the temperature set by the temperature setting unit. A temperature controller for operating the damper device to close the refrigerating compartment passage and thereafter stopping the cold air generating means when the temperature is lower.