JPH06147715A - Freezing refrigerator - Google Patents

Abstract

PURPOSE:To prevent a vegetable chamber from being overcooled by forcedly circulating cold air in a refrigerator when an electric motor driven damper gets an open state in the course of operation interruption of a compressor for refrigerant compression. CONSTITUTION:When an electric motor driven damper 10 for opening/closing a cold air passage from a freezing chamber 1 to a refrigerator chamber 2 gets an open state in the course of operation interruption of a compressor 6 for refrigerant compression, an in-refrigerator fan 8a is operated to forcedly circulate cold air in the refrigerator. Accordingly, even when operation of the compressor 6 is interrupted and the electric motor driven damper 10 is opened, the cold air from a suction duct 18a being a cold air return duct of a vegetable chamber 3 is prevented from being reversely driven. For this, minus temperature cold air stored in a condenser chamber 7 is properly circulated in the refrigerator and is prevented from flowing into the vegetable chamber 3. Hereby, the vegetable chamber 3 is prevented from being overcooled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator / freezer, and more particularly to a refrigerator / freezer which uses an electric damper to control the temperature of a refrigerator compartment.

[0002]

2. Description of the Related Art There is a technique disclosed in Japanese Patent Application Laid-Open No. 3-267677 as a related one of this type of conventional refrigerator-freezer. FIG. 2 is a vertical sectional view showing a conventional refrigerator-freezer. In the figure, 1 is a freezing room, 2 is a refrigerating room, 3 is a vegetable room, and the inside of this refrigerator is divided into a refrigerating room 2, a freezing room 1 and a vegetable room 3 from the top. Reference numeral 4 denotes a temperature sensor (hereinafter, referred to as F thermistor) that detects the temperature inside the freezing compartment 1, 5 is a temperature sensor that detects the temperature inside the refrigeration compartment 2 (hereinafter referred to as R thermistor), and 6 is a cooling cycle (see FIG. A compressor for compressing a refrigerant (not shown), 7 is a cooler chamber in which a cooler 7a is arranged, 8 is a fan motor for driving a fan 8a for forcibly circulating the cool air in the refrigerator, and 9 is a freezer chamber 1 It is a partition plate that separates the cooling chamber 7 and the cooler chamber 7, and has an outlet 9 at the top.
and a return port 9b is formed at the bottom. Reference numeral 10 is an electric damper that opens and closes the baffle 10a according to the temperature inside the refrigerator, and 11 is a partition wall that separates the freezer compartment 1 and the refrigerating compartment 2. A suction duct 11a is formed in the partition wall 11. . Reference numeral 12 is a duct formed in the rear part of the partition wall 11, reference numeral 13 is a control unit for controlling the operation of the electric damper 10, and reference numeral 14 is a power source. Reference numeral 15 is a cold air rising duct formed at the back of the refrigerating compartment 2, and 16 is a cold air blowing duct also formed at the back of the refrigerating compartment 2, through which cool air flows. 16a to 16d are rear air outlets formed in the cool air blowing duct 16, 17 is a duct that cuts through the cooler chamber 7, and 18 is a partition wall that separates the freezer compartment 1 and the vegetable compartment 3 from each other. The suction duct 18a is formed in the.

FIG. 3 is a block diagram showing a conventional control device for a refrigerator-freezer, and shows a circuit configuration of the control unit 13. In the figure, 13a is a microcomputer (hereinafter referred to as a microcomputer) as a control unit of the present embodiment, 13b is a ROM (read only memory) in which various control programs and the like are stored, 13c is various processing results and data, etc. Is stored in RAM (random access memory), 13d is a drive unit that issues a drive command from the microcomputer 13a, 13e to
13g is a relay for directly operating the compressor 6, the fan motor 8, and the electric damper 10, and 13h is an electric damper 1.
This is a detection unit that detects an operating state of 0 (open / closed).

Next, the operation of the refrigerator-freezer will be described with reference to FIG. FIG. 4 is a flowchart showing the control operation of the conventional refrigerator-freezer, which is the ROM 13b of the microcomputer 13a.
3 shows an outline of the program stored in.
In the figure, first, in step S1, the F thermistor 4 and R
Read the input of the thermistor 5. Then, the operation of the compressor 6 and the fan motor 8 is controlled according to the result of the determination in step S2. That is, it is determined whether or not the temperature inside the freezer compartment 1 is lower than the temperature data already read by the F thermistor 4 in step S2, and if the inside temperature in the freezer compartment 1 is high, go to step S3. Then, the compressor 6 and the fan motor 8 are operated. On the contrary, when the temperature inside the freezer compartment 1 is low, the process proceeds to step S4, and the operation of the compressor 6 and the fan motor 8 is stopped. When operating the compressor 6 and the fan motor 8, the opening / closing of the electric damper 10 is controlled according to the result of the determination in step S5. That is, it is determined whether or not the temperature inside the refrigerator 2 is lower than the temperature data already read by the R thermistor 5 in step S5,
If the temperature inside the refrigerator compartment 2 is high, the operation proceeds to step S6, and the electric damper 10 is opened. Conversely, if the temperature inside the refrigerator compartment 2 is low, the operation proceeds to step S7, and the electric damper is activated. Close 10 Thus, the conventional refrigerator-freezer controls the temperature inside the refrigerator.

Here, the flow of cold air in the refrigerator having the above-mentioned structure will be described with reference to FIGS. 2 and 5. FIG. 5 is a vertical sectional view showing a backflow of cold air in a conventional refrigerator-freezer.
First, as shown in FIG. 2, the cool air cooled by the cooler 7a of the cooler chamber 7 is blown to the freezing chamber 1 and the refrigerating chamber 2 by the fan motor 8 and the fan 8a, respectively. Cold air is blown into the freezer compartment 1 from the outlet 9a of the partition plate 9 and returned to the cooler compartment 7 from the return opening 9b. To the refrigerating chamber 2, the duct 12 is passed, the baffle 10a of the electric damper 10 is sent to the cold air rising duct 15, and the cold air blowing duct 16 is lowered.
The air is blown out from the rear air outlets 16a to 16d formed for each shelf. The vegetable compartment 3 is cooled by the cold air returned from the refrigerating compartment 2. That is, the returned cool air in the refrigerating chamber 2 that has been sucked in from the front of the intermediate partition wall 11 is sent to the rear through the suction duct 11 a, passes through the duct 17 that longitudinally crosses the cooler chamber 7, and penetrates the intermediate partition wall 18. It is blown to the vegetable room 3. And
The cold air in the vegetable compartment 3 is returned to the cooler compartment 7 from before the partition wall 18 through the suction duct 18a.

Next, the flow of cold air in the refrigerator when the compressor 6 is stopped will be described. As shown in FIG. 5, when the compressor 6 is stopped,
The cool air in the cooler chamber 7 is the suction duct 18a of the partition wall 18.
To the vegetable compartment 3, and then the moist cold air passes through the duct 17 through the suction duct 11a of the refrigerating compartment 2 and through the refrigerating compartment 2 to descend the cool air rising duct 15.
It returns to the freezer compartment 1 through the electric damper 10. At this time,
If the baffle 10a of the electric damper 10 is closed, some reverse convection occurs in the vegetable compartment 3, but it does not return to the refrigerating compartment 2, so the vegetable compartment 3 does not get too cold. On the other hand, when the baffle 10a of the electric damper 10 is opened, as described above, the cold air is reversely convected from the freezer compartment 1, and the moist cold air that has passed through the vegetable compartment 3 is sucked into the refrigerating compartment 2 through the duct 17. It circulates in the refrigerating chamber 2 through the duct 11a, changes to moist warm air, and returns to the duct 12 via the electric damper 10.

[0007]

However, in the conventional refrigerator-freezer as described above, the baffle 1 of the electric damper 10 is used.
The open / close control of 0a and the operation control of the fan motor 8 are performed as shown in the flowchart of FIG. 4. Therefore, when the compressor 6 is stopped and the electric damper 10 is in the open state, the vegetable compartment 3 Suction duct 18a which is the cold air return duct of
The cold air was causing a backflow phenomenon. This is the vegetable room 3
The temperature of the cooler room 7 is lower than the temperature of the fan room, and the fan motor 8 is stopped while the compressor 6 is not operating. The cooler air has a higher specific gravity and lowers downward, so that natural convection causes the vegetable room to cool down. This is because the cold air flows back to 3. Therefore, cold air having a negative temperature accumulated in the cooler chamber 7 flows into the vegetable chamber 3, and there are problems that the vegetable chamber 3 is too cold, vegetables are frozen, and the like.

After the convection in the vegetable compartment 3, it becomes moist warm air, and returns to the cooler compartment 7 through the duct 17, the suction duct 11a, and the refrigerating compartment 2 and the electric damper 10, so that it becomes damp. Baffle 1 of electric damper 10 by warm air
There was a risk that 0a would freeze and the opening / closing control could not be performed.

Therefore, the present invention provides a refrigerating refrigerator capable of preventing backflow of cold air while the compressor 6 is not operating, preventing the vegetable compartment 3 from overcooling, and preventing the baffle 10a of the electric damper 10 from freezing. It is what

[0010]

A freezer-refrigerator according to the invention of claim 1 is divided into a refrigerating room, a freezing room, and a vegetable room from above, and a room in which cold air circulates, and from the freezing room to the refrigerating room. The electric damper that opens and closes the cold air passage according to the temperature inside the refrigerator, and when the electric damper is opened while the compressor for compressing the refrigerant is stopped, the cold air inside the refrigerator is forced. And a cold air circulation control means for circulating the cold air.

The freezer-refrigerator according to the second aspect of the present invention is divided into a refrigerating room, a freezing room, and a vegetable room from above, in which cold air circulates, and a passage of cold air from the freezing room to the refrigerating room. An electric damper that opens and closes according to the internal temperature, an internal fan that circulates the cold air in the cold storage, and an electric damper when the compressor for refrigerant compression is stopped while the electric damper is open The internal fan operation control means for operating the internal fan is provided.

[0012]

In the refrigerating refrigerator according to the first aspect of the present invention, when the electric damper for opening and closing the passage of cold air from the freezing compartment to the refrigerating compartment is opened while the compressor for compressing the refrigerant is stopped, Since the cold air in the cold storage is forcibly circulated, it is possible to prevent the backflow of the cool air while the compressor is stopped.

In the refrigerator according to the invention of claim 2,
When the electric damper that opens and closes the passage of cold air from the freezer compartment to the refrigerating compartment is opened while the compressor for compressing the refrigerant is stopped, it operates an internal fan that circulates the cold air in the refrigerator. Therefore, cold air is forced to circulate in the refrigerator,
It is possible to prevent the cold air from flowing back while the compressor is stopped.

[0014]

EXAMPLES Examples of the present invention will be described below.
In the present embodiment as well, the vertical sectional view of the refrigerator-freezer and the circuit configuration of the control device are the same as those in FIGS. Further, since the present embodiment is realized by changing the control program stored in the ROM 13b of the microcomputer 13a of the control unit 13, the detailed description of the configuration will be omitted.

The operation of the refrigerator / freezer of this embodiment will be described with reference to FIG. FIG. 1 is a flow chart showing a control operation of a refrigerator-freezer according to an embodiment of the present invention, showing an outline of a program stored in the ROM 13b of the microcomputer 13a. In the figure, the same reference numerals and symbols (step numbers) as in FIG. 4 of the above-mentioned conventional example are the same or corresponding constituent parts (processes) as those of the above-mentioned conventional example. In the figure, first, in step S1, the inputs of the F thermistor 4 and the R thermistor 5 are read. Then, the operation control of the compressor 6 and the operation flags of the fan motor 8 and the compressor 6 are determined according to the determination result of step S2. That is, it is determined whether or not the temperature inside the freezer compartment 1 is lower than the temperature data already read by the F thermistor 4 in step S2, and if the inside temperature in the freezer compartment 1 is high, go to step S11. Go ahead, compressor 6
The operation flag E of the fan motor 8 is set to "1", and the operation flag F of the compressor 6 is set to "1". On the contrary, when the temperature inside the freezer compartment 1 is low, the process proceeds to step S12, the operation of the compressor 6 is stopped, and the operation flag E of the fan motor 8 and the operation flag F of the compressor 6 are both set to "0". Set to. Next, step S5 and step S
13 to step S15, the opening / closing control of the electric damper 10 and the operation flag of the fan motor 8 are determined. That is,
In step S5, it is determined whether the temperature inside the refrigerating compartment 2 is lower than the temperature data already read by the R thermistor 5, and if the temperature inside the refrigerating compartment 2 is higher, step S1
3 to determine whether the operation flag F of the compressor 6 is "1", and when the operation flag F of the compressor 6 is not "1", that is, when the operation flag E is "0", the fan Since the operation flag F of the motor 8 is also "0", the process proceeds to step S15, the electric damper 10 is opened, and the operation flag E of the fan motor 8 is set to "1". In addition, step S13
If the operation flag F of the compressor 6 is "1", the process directly proceeds to step S16. On the other hand, if the temperature inside the refrigerator compartment 2 is low in step S5, the process proceeds to step S14, the electric damper 10 is closed, the operation flag E of the fan motor 8 is set to "0", and the process proceeds to step S16. .
In the next steps S16 to S18, the operation of the fan motor 8 is controlled. That is, it is determined in step S16 whether the operation flag E of the fan motor 8 is "1",
When the operation flag E of the fan motor 8 is "1", the process proceeds to step S17, the fan motor 8 is operated, and when the operation flag E of the fan motor 8 is not "1", that is, the operation flag E is "0". In the case of, the process proceeds to step S18, and the operation of the fan motor 8 is stopped. In this way, the temperature inside the refrigerator is controlled.

This control will be described more specifically. For example, if the temperature of the freezer compartment 1 is low in step S2, the process proceeds to step S12, the stop signal of the compressor 6 is sent to the drive unit 13d, and the relay is performed. The excitation of the coil of 13e is stopped, the contact is opened, the operation of the compressor 6 is stopped, the operation flag E of the fan motor 8 is set to "0", and the operation flag F of the compressor 6 is set to "0". Set. Next, when the temperature of the refrigerator compartment 2 is high in step S5, the operating state of the compressor 6 is determined in step S13. Here, the operation flag F of the compressor 6 is set to "0" in step S12.
Is set, the open signal of the electric damper 10 is sent to the drive unit 13d in step S15, and the relay 13g
The coil is excited to close the contacts, the electric damper 10 is opened, and the operation flag E of the fan motor 8 is set to "1". Then, the operation state of the fan motor 8 is determined in step S16. Here, since the operation flag E of the fan motor 8 is set to "1" in step S15, the operation signal of the fan motor 8 is output in step S17. It is sent to the drive unit 13d to excite the coil of the relay 13f to close the contacts and operate the fan motor 8.
Force cold air to circulate. As a result, convection of cold air that flows back to the vegetable compartment 3 can be prevented, and the vegetable compartment 3 can be prevented from overcooling and the baffle 10a of the electric damper 10 can be prevented from freezing.

As described above, the freezer-refrigerator of this embodiment is divided into a refrigerating compartment 2, a freezing compartment 1 and a vegetable compartment 3 from above, and a compartment in which cold air circulates, and from the freezing compartment 1 to the refrigerating compartment 2. An electric damper 10 that opens and closes a duct 12, which is a passage for cool air, of the F thermistor 4 and the R thermistor 5 in accordance with the temperature inside the refrigerator.
When the electric damper 10 is opened while the compressor 6 for compressing the refrigerant is stopped, the in-compartment fan composed of the fan motor 8 and the fan 8a for circulating the cool air in the compartment is forcibly forced. It is provided with a cold air circulation control means which operates and performs control as shown in FIG. 1 for forcibly circulating the cold air in the cold storage.

That is, in the refrigerator-freezer of this embodiment, the electric damper 10 for opening and closing the passage of cold air from the freezing compartment 1 to the refrigerating compartment 2 is opened while the compressor 6 for compressing the refrigerant is stopped. In this case, the cold air in the cold storage is forcibly circulated, and the forced circulation of the cold air is performed by forcibly operating the internal fan.

Therefore, even when the compressor 6 is stopped and the electric damper 10 is open as in the conventional case, the suction duct 18a which is the cold air return duct of the vegetable compartment 3 is used.
Cold air doesn't flow backwards. For this reason, the cold air having the negative temperature accumulated in the cooler chamber 7 properly circulates in the chamber and does not flow into the vegetable chamber 3, so that the vegetable chamber 3 is not overcooled and the vegetables are not frozen. In addition, since it does not return to the cooler chamber 7 via the electric damper 10 as humid warm air,
The baffle 10a of the electric damper 10 does not freeze.

[0020]

As described above, the refrigerator-freezer of the invention of claim 1 is provided with the inside of the refrigerator, the electric damper, and the cool air circulation control means, and while the compressor for compressing the refrigerant is stopped, When the electric damper that opens and closes the passage of cold air from the freezer compartment to the refrigerating compartment is in the open state, the cool air in the refrigerator is forced to circulate, which prevents the backflow of cold air while the compressor is stopped. As a result, it is possible to prevent the vegetable compartment from becoming too cold and the electric damper baffle to freeze.

The refrigerator / freezer according to the second aspect of the present invention comprises:
An electric damper provided with an electric damper, an internal fan, and an internal fan operation control means that opens and closes a passage for cold air from the freezer compartment to the refrigerating compartment while the compressor for refrigerant compression is not operating. When this happens, by operating an internal fan that circulates the cold air inside the refrigerator, the cold air is forcibly circulated inside the refrigerator and it is possible to prevent the backflow of cold air while the compressor is stopped. It can prevent over-cooling and freezing of the electric damper baffle.

[Brief description of drawings]

FIG. 1 is a flowchart showing a control operation of a refrigerator-freezer according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a conventional refrigerator and a refrigerator-freezer according to an embodiment of the present invention.

FIG. 3 is a block diagram showing a control device for a refrigerator-freezer according to the related art and one embodiment of the present invention.

FIG. 4 is a flowchart showing a control operation of a conventional refrigerator-freezer.

FIG. 5 is a vertical cross-sectional view showing a backflow of cold air in a conventional refrigerator-freezer.

[Explanation of symbols]

 1 Freezer Room 2 Refrigerator Room 3 Vegetable Room 4 F Thermistor 5 R Thermistor 6 Compressor 7 Cooler Room 8 Fan Motor 10 Electric Damper 10a Baffle 11a Suction Duct 12 Duct 13a Microcomputer (Control Part) 15 Cold Air Rising Duct 16 Cold Air Blowing Duct 17 Duct 18a Suction duct

Claims (2)

[Claims] 1. An electric type that is divided into a refrigerating room, a freezing room, and a vegetable room from above to circulate cold air, and an electric passage that opens and closes a passage of cold air from the freezing room to the refrigerating room in accordance with the temperature inside the room. A damper and a cold air circulation control means for forcibly circulating the cold air in the refrigerator when the electric damper is opened while the compressor for compressing the refrigerant is stopped. Freezer refrigerator. 2. An electric type, which is divided into a refrigerating room, a freezing room, and a vegetable room from above and in which cold air circulates, and a passage for cold air from the freezing room to the refrigerating room is opened / closed according to the temperature inside the room. A damper, an internal fan that circulates the cold air in the internal storage, and an internal fan operation that operates the internal fan when the electric damper is opened while the compressor for refrigerant compression is stopped. A freezer-refrigerator, comprising: a control unit.