JPH1038443A - Temperature control device for refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the temperature of an ice temperature chamber from attaining the temperature of a refrigerating chamber even when the temperature of the refrigerating chamber is lower than a refrigerating chamber set temperature and the refrigerating chamber set temperature is higher than an outside air temperature. SOLUTION: An outside temperature is detected by an outside temperature detecting sensor 71c, and a temperature range to forcibly open and close a cold air introduction passage is set by an outside temperature control range measuring apparatus 72c. Further, the temperature of a refrigerating chamber is set by a refrigerating chamber temperature setter 72a and the temperature of the refrigerating chamber is detected by a refrigerating chamber temperature detecting sensor 71a. When the temperature of the refrigerating chamber is lower than a refrigerating chamber set temperature and an outside air temperature is within an outside air control temperature range, a control part 73 starts a compressor and operates a damper device to feed cold air to the refrigerating chamber and an ice temperature chamber for a given time. This constitution prevents the temperature of the ice temperature chamber from attaining the temperature of the refrigerating chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to prevent the temperature of an ice warm room provided in a refrigerator from approaching the temperature of the refrigerator when the temperature of the refrigerator falls below a set temperature. The present invention relates to a temperature control device for a refrigerator-freezer that forcibly operates a damper device under predetermined conditions.

[0002]

2. Description of the Related Art In general households and the like, a freezer compartment, a refrigerator compartment, and a refrigerator-freezer having an ice hot compartment and a vegetable compartment provided in the refrigerator compartment are widely used today.

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. It leads to the cold air introduction passage communicating with the damper room.

[0004] A damper device is provided in the damper room so as to open and close the cold air introduction passage. The refrigerator room passage communicates from the damper device to the refrigerator room via the cool air duct, the ice room passage communicates with the ice room, and the vegetable room. There is provided a vegetable compartment passage communicating with.

[0005] The temperature control of the refrigerator compartment, the ice compartment and the vegetable compartment, that is, the flow rate of the cold air, is appropriately set by the size of the outlet of the refrigerating compartment passage, the outlet of the ice compartment compartment and the outlet of the vegetable compartment passage. The adjustment has been made. Of course, the flow rate and temperature of the cool air do not correspond unconditionally, and are determined in consideration of the size of the room and the like.

The damper device has a baffle. When the baffle closes the cool air introduction passage, cool air is blown only to the freezing room, and when the baffle opens the cool air introduction passage, the freezing room,
Cold air is blown to the refrigerator compartment, the ice greenhouse and the vegetable compartment.

The operation of the damper device (that is, the opening / closing operation of the baffle) is determined based on the relationship between the temperature of the freezer compartment and the set temperature of the freezer compartment and the relationship between the temperature of the refrigerator compartment and the set temperature of the refrigerator compartment. Controlling.

That is, when the temperature of the freezer compartment is higher than the set temperature of the freezer compartment, the cool air generating means is operated to generate cool air, and the cool air is sent to the freezer compartment.

At this time, if the temperature of the refrigerating compartment is lower than the set temperature of the refrigerating compartment, it is not necessary to blow cold air into the refrigerating compartment. When the temperature of the refrigerator compartment is higher than the set temperature of the refrigerator compartment, the cool air introduction passage is opened to blow the cool air to the refrigerator compartment and the like, and the cool air is blown to the freezer compartment and the refrigerator compartment and the like.

On the other hand, when the temperature of the freezing room is lower than the set temperature of the freezing room, the cool air generating means is stopped to stop the generation of the cool air, and the cool air introducing passage is closed.

[0011]

However, the above configuration has the following problems because the relationship between the outside air temperature and the temperature of the refrigerator compartment is not considered.

That is, when the temperature of the refrigerator compartment is lower than the preset temperature of the refrigerator compartment and the outside air temperature is lower than the preset temperature of the refrigerator compartment, the refrigerator compartment is not heated by the outside air (in this case, Until these relations change, the cold air introduction passage continues to be closed, and the state in which no cool air is blown into the refrigerator room, ice temperature room, or the like continues.

Generally, the temperature of the ice greenhouse is set so as to be kept in the range of 0 to -3 degrees Celsius, and is set to be lower than the temperature of the refrigerator compartment. For a long time, since the ice greenhouse is disposed in the refrigerator, there is a problem that the temperature of the ice greenhouse gradually approaches the temperature of the refrigerator.

Therefore, the present invention can prevent the temperature of the ice compartment from approaching the temperature of the refrigerator compartment even when the temperature of the refrigerator compartment is lower than the preset temperature and the outside air temperature is lower than the preset temperature of the refrigerator compartment. It is an object of the present invention to provide a fridge-freezer temperature control device that can be used.

[0015]

Means for Solving the Problems To solve the above problems, the invention according to claim 1 comprises a cold air generating means for generating cold air, a cold room from the cold air generating means, and an ice greenhouse disposed in the cold room. A damper device arranged in the middle of a refrigerator compartment passage communicating with the air conditioner is controlled to open or close the refrigerator compartment passage by the damper device, thereby switching whether or not to introduce cold air into the refrigerator compartment and the ice warm room. In a refrigerator / freezer temperature control device that appropriately maintains the temperature of a refrigerator, a temperature detector that detects the temperature of the refrigerator and detects the outside air temperature, and sets the temperature of the refrigerator room and controls the outside air temperature. A temperature setting unit for setting a temperature range, a temperature of the refrigerating compartment being lower than a set temperature of the refrigerating compartment, and the control temperature range being the temperature based on signals from the temperature setting unit and the temperature detecting unit. When it is determined that the temperature is lower than the set temperature of the refrigerator compartment set by the setting unit and that the outside air temperature is within the control temperature range, the cold air generating means is activated and the damper device is operated to operate the refrigerator compartment. A control unit that opens the passage and forcibly blows cool air into the refrigerator compartment and the ice compartment for a predetermined time.

That is, the temperature of the refrigerator compartment is lower than the set temperature of the refrigerator compartment, and the outside air temperature is lower than 13 degrees Celsius,
Further, when the temperature is within the control temperature range higher than the set temperature of the ice greenhouse, the damper device is operated for a predetermined time to forcibly blow cool air into the refrigerator room and the ice green room, and the temperature of the ice green room reaches the temperature of the cold room. It is characterized by preventing.

[0017]

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 having a heat insulating structure (hereinafter referred to as a main body). The main body 1 is filled with a foamed heat insulating material 4 between an inner box 2 and an outer box 3 each having an open front surface. Is formed.

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 damper chamber 20 in which a damper device 50 is provided is provided at the back of the ice temperature chamber 15.

At the back of the freezing compartment 6, there is provided a cooling compartment 14 provided with a cooler 12 as a cool air generating means and a fan 13, and a low temperature generated by a compressor 28 and the like provided at the lower part of the refrigerator. The refrigerant circulates through the cooler 12 and the fan 13
Is rotated to generate cool air in the cooler 12.

The freezer compartment passage is a passage connecting the cooling chamber 14 and the freezer compartment 6 to each other. In addition, the refrigerating room passage is a cooling room 14.
And a cold air duct 16 connected to the cold air introduction passage 24 in the damper chamber 20.

The cold air duct 16 is provided at the back of the cold room 5, and is connected to the cold room 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 generated in the cooler 12 is blown to the freezing room 6 and guided to the damper device 50 by the cool air introduction passage 24, and from the damper device 50 through the cooling duct 16, the cold room 5 is cooled. Vegetable room 7 and ice greenhouse 15
It is blown to.

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 comprising a passage opening / closing section 51 and a driving section 56, and a control means 70 comprising 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 cold 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 detecting section 71 includes a refrigerator compartment temperature detection sensor 71a for detecting the temperature of the refrigerator compartment 5, a freezer compartment temperature detection sensor 71b for detecting the temperature of the freezer compartment 6, and an outside air temperature detection sensor 71c.

The temperature setting section 72 includes a refrigerator room temperature setting device 72a for setting the temperature of the refrigerator room 5, a freezing room temperature setting device 72b for setting the temperature of the freezing room 6, and an outside for setting a control temperature range for the outside air temperature. It has an air temperature control range setting device 72c.

The control unit 73 outputs control signals to the stepping motor driver 74a and the cool air generator driver 74b of the driver 74 based on signals from the temperature detecting unit 71 and the temperature setting unit 72, and outputs the control signal to the compressor 28 and the fan 13 A CPU 73a for stopping the stepping motor 59; and a memory 73b for storing various data such as control information performed by the CPU 73a.

With such a configuration, the compressor 28, the fan 13 and the stepping motor 59 operate according to the signal from the control unit 73, thereby generating cold air and opening and closing the baffle 54.

By the way, the stepping motor 59 is operated by a pulse signal, rotates by an amount corresponding to the pulse signal, and keeps flowing the exciting current at the time of stop 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, the driving section 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, so that the baffle 54 does not freeze and becomes uncontrollable.

Next, the operation of the control means 70 for controlling the temperature of the refrigerator by controlling the cold air generating means such as the damper device 50 and the compressor 28 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 a 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 of the freezing room 6 set in 2b.

If the measured temperature Fr of the freezing compartment 6 is lower than the set temperature Fs, step S1 is performed to stop the generation of cool air.
Proceeding to step 2, the compressor 28 and the fan 13 are stopped, and the baffle 54 is closed in step S13, and
Return to

The reason why the baffle is closed in step S13 is to prevent the air in the refrigerated room 5 having a high humidity from flowing back to the damper device 50 to prevent frost and ice from adhering to the baffle 54 and the like.

On the other hand, if the measured temperature Fr of the freezer compartment 6 is higher than the set temperature Fs in step S1, the process proceeds to step S2, where it is determined whether or not the compressor 28 is stopped.

When the compressor 28 is stopped, that is, the temperature of the freezing compartment 6 has been the measured temperature Fr <set temperature Fs, but the measured temperature Fr> set because the temperature of the freezing compartment 6 has increased. When the cold air is blown into the freezing compartment 6 because the temperature Fs is satisfied, the baffle 54 is in a closed state, so the baffle 54 is forcibly opened in step S3 and the timer is set (not started). Proceed to step S4.

If it is determined in step S2 that the compressor 28 is operating, that is, although the cool air is being blown into the freezing compartment 6, the measured temperature Fr does not yet satisfy the set temperature Fs. In this case, since the baffle 54 is in the open state, the process directly proceeds to step S4.

In step S4, the compressor 28 and the fan 13 are operated to generate cool air, and the process proceeds to step S5. At this time, when the compressor 28 and the like are already operating, this step is substantially passed.

In step S5, it is determined whether the measured temperature Rr of the refrigerator compartment 5 is higher than the set temperature Rs. If it is higher, the process proceeds to step S11, and if lower, the process proceeds to step S6.
Proceed to.

When proceeding to step S11, the refrigerator 5
Is higher than the set temperature, the baffle 54 is opened to lower the temperature of the refrigerator compartment 5 regardless of the outside air temperature, and the process returns to step S1.

On the other hand, when the process proceeds from step S5 to step S6, the measured temperature Rr of the refrigerator compartment 5 is lower than the set temperature Rs, so that the baffle 54 is closed.

Then, in step S6, it is determined whether or not the outside air temperature Tg is lower than the high temperature side control temperature Tga.
If g is lower than the high-side control temperature Tga, the process proceeds to step S7. If the outside air temperature Tg is higher than the high-side control temperature Tga, the process proceeds to step S10.

In step S7, it is determined whether or not the outside air temperature Tg is higher than the low-temperature side control temperature Tgb. If the outside air temperature Tg is higher than the low-temperature side control temperature Tgb, step S8 is performed.
If the outside air temperature Tg is lower than the low-side control temperature Tgb, the process proceeds to step S10.

That is, in step S6 and step S7, the temperature at which the outside air temperature Tg does not become a preset load on the refrigerator compartment 5, that is, the high temperature side control temperature Tga set at 13 degrees Celsius, and the set temperature of the refrigerator compartment 5 It is determined whether or not the temperature is in the temperature range of the lower control temperature Tgb which is lower and higher than the set temperature of the ice temperature chamber 15.

If the outside air temperature Tg is higher than the high-side control temperature Tga, the process proceeds from step S6 to step S10,
The outside air temperature Tg is equal to the high-side control temperature Tga and the low-temperature side control temperature T.
gb, the process proceeds from step S7 to step S8, in which the outside air temperature Tg is further reduced to the lower control temperature Tgb.
If it is lower, the process proceeds from step S7 to step S10.

If the outside air temperature Tg> the high set temperature Tga, the process proceeds to step S10 to perform the normal processing, the baffle 54 is closed, and the process returns to step S1.

When the high set temperature Tga> the outside air temperature Tg> the low set temperature Tgb, the cooling room 5 is not heated by the outside air, so that the blowing of the cool air to the cooling room 5 may be stopped for a long time. As a result, the temperature of the ice chamber 15 approaches the temperature of the refrigerator 5, so that the temperature of the baffle 5 is temporarily reduced.
4 is forcibly opened and cool air is blown to the refrigerator compartment 5.

The time during which the baffle 54 is forcibly opened is determined by the time set in the timer in step S3, and the timer is started in step S8, and the elapse of the time is determined in step S9.

If the timer has not counted the predetermined time, the baffle 54 is forcibly opened in step S11,
When the timer has counted the predetermined time, the process proceeds to step S10, the baffle 54 is closed, and the process returns to step S1.

The timer described above is built in the CPU, and the condition for starting the timer in step S8 is that the timer must be set in step S3. Therefore, for example, step S1
After returning to step S1 via step 1, even if step S8 is reached again, the timer does not restart.

Further, when the outside air temperature Tg <the low set temperature Tgb, the temperature of the ice room 15 becomes the same as the temperature of the refrigerator room 5 as in the case of the above-mentioned high set temperature Tga> outside air temperature Tg> low set temperature Tgb. Approaching, but if the outside air temperature is too low,
Is cooled by the outside air temperature. In this state, when cold air is forcibly blown to the cold room 5 and the ice green room 15 in order to keep the temperature of the ice room 15 properly, the cold room 5 is cooled.
There is a possibility that the food and the like stored in the container may be adversely affected by being too cold.

Therefore, in this case, the process proceeds from step S7 to step S10 to perform normal processing, and the baffle 54
And returns to step S1.

In this way, when the outside air temperature Tg is in the relationship of the high set temperature Tga> the outside air temperature Tg> the low set temperature Tgb, the baffle 54 is temporarily forcibly opened, so that the temperature of the ice temperature chamber 15 becomes refrigerated. It becomes possible to prevent the temperature of the chamber 5 from approaching.

[0060]

According to the present invention, the temperature of the refrigerator becomes lower than the set temperature of the refrigerator, and the outside air temperature becomes 13 degrees Celsius.
When the temperature is within the control temperature range that is lower than the temperature and is higher than the set temperature of the ice greenhouse, the damper device is forcibly operated so that the cool air is blown into the refrigerator room and the ice green room for a predetermined time. Therefore, the temperature of the ice greenhouse can be prevented from approaching the temperature of the refrigerator.

[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 Cold air supply passage for refrigerator 19 Damper 20 Damper rooms 23a, 23b Cold air supply passage for ice greenhouse 24 Cold air introduction passage 50 Damper Device 51 Passage opening / closing part 52 Closure plate 53 Opening part 54 Baffle 55 Rotating shaft 56 Driving part 59 Stepping motor 60 Gear 61 Stopper 70 Control means 71 Temperature detecting part 71a Refrigerator room temperature detecting sensor 71b Freezing room temperature detecting sensor 71c Outside air temperature detecting Sensor 72 Temperature setting unit 72a Refrigerator room temperature setting unit 72b Freezer room temperature setting unit 72c Outside air temperature control range setting unit 73 Control unit 73a CPU 73b Memory 74 driver 74a Stepping motor driver 74b Cold air generator driver 75 Door open / close detection unit

Claims (1)

[Claims] 1. A cold air generating means for generating cold air, and a damper device provided in the middle of a refrigerator compartment passage communicating from the cold air generating means to a refrigerator compartment and an ice temperature compartment provided in the refrigerator compartment. A temperature control device for the refrigerator, which switches whether or not to introduce cold air into the refrigerator compartment and the ice temperature compartment by opening and closing the refrigerator compartment passage by the damper device, thereby keeping the refrigerator refrigerator temperature at an appropriate level. A temperature detecting unit for detecting the temperature of the refrigerator and detecting the outside air temperature; a temperature setting unit for setting the temperature of the refrigerator compartment and setting a control temperature range for the outside air temperature; and the temperature setting unit and the temperature detecting unit. The temperature of the refrigerator compartment is lower than the set temperature of the refrigerator compartment, and the control temperature range is lower than the preset temperature of the refrigerator compartment set by the temperature setting section, and If it is determined that the temperature is within the control temperature range, the cold air generating means is activated and the damper device is operated to open the cold storage chamber passage, thereby forcing cold air into the cold storage chamber and the ice temperature chamber for a predetermined time. A temperature control device for a refrigerator-freezer, comprising: a control unit for blowing air.