JPH0650214B2 - refrigerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a refrigerator in which cold air cooled by a cooler is circulated in the refrigerator, in which compartments are formed in the refrigerator.

(B) Prior Art A conventional refrigerator of this type is disclosed, for example, in Japanese Utility Model Laid-Open No. 58-22678. In this publication, a closed storage chamber is formed in a refrigerating chamber, a cold air passage is formed around this storage chamber, and cold air from a blower is introduced into this cold air passage to cool the room without drying it. The temperature control in the room is achieved by adjusting the amount of cold air supplied to the cold air passage by the damper plate, but accurate temperature control by such a manual damper is difficult.

Further, conventionally, this kind of compartment is controlled at a freezing temperature such as a freezing room or at a temperature of + 1 ° C. to + 2 ° C., which is slightly lower than the refrigerating room temperature, and usually stores and stores fast-rotating food such as meat and fish. Although it is used for freezing, although long-term storage of food is achieved with freezing, there is a drawback that the flavor is impaired when thawing for cooking, and the flavor is impaired by controlling + 1 ° C to + 2 ° C. Although it does not exist, it has a short shelf life.

On the other hand, Japanese Utility Model Laid-Open No. 57-148689 has a fan for cooling a refrigerating compartment and a fan for cooling a freezing compartment, and the rotation speeds of both fans are digital (that is, stepwise) according to the temperatures of the refrigerating compartment and the freezing compartment, respectively. ) Is disclosed, the fan motor control device in a freezer-refrigerator for maintaining the refrigerating room and the freezing room at a desired temperature is disclosed, but a compartment (that is, an ice greenhouse) that is maintained at the ice temperature temperature by indirect cooling is disclosed. Since there is no return path for the cold air that has been introduced into the refrigerating room, and because part of the cold air from the freezing room is being introduced into the refrigerating room, the temperature in the refrigerating room is likely to depend on the temperature in the freezing room, and accurate temperature control is There was a problem that it could not be applied to refrigerators that require extremely fine temperature control performance, such as ice greenhouses.

(C) Object of the invention The present invention is to stepwise change the number of revolutions of an auxiliary blower provided exclusively for a compartment in a refrigerator that indirectly cools the compartment to bring the compartment to an ice temperature. The purpose is to provide a refrigerator that is easy to maintain.

(D) Configuration of the Invention The present invention divides the inside of the heat-insulating box into two compartments, a freezer compartment and a refrigerator compartment, and controls the compressor and the main blower based on the temperature of the freezer compartment detected by the freezer compartment sensor. A refrigerator provided with: a compartment formed in the heat-insulating box in a substantially sealed manner; a cold air passage formed around the compartment for indirectly cooling the compartment; and a cold air passage. Auxiliary blower for controlling the amount of cool air to the compartment, a compartment sensor for detecting the temperature in the compartment, a fixed temperature higher upper limit temperature and a constant temperature lower lower limit temperature with respect to the set temperature of the compartment, the compartment And a control means for judging whether the temperature of the room is in an increasing tendency or a decreasing tendency, the temperature control device, when the judgment result in the controlling means has a decreasing tendency, when the temperature is equal to or higher than the set temperature, the refrigeration Temperature detected by the room sensor Even if the auxiliary blower is operated at a high speed, the auxiliary blower is operated at a medium speed when the temperature is equal to or higher than the lower limit temperature and lower than the set temperature, and the auxiliary blower is stopped when the temperature is lower than the upper limit temperature. When the result tends to rise, when the temperature is lower than the preset temperature, the auxiliary blower is stopped, and when the temperature is higher than the preset temperature and lower than the upper limit temperature, the auxiliary blower is operated at a medium speed, and when the temperature is higher than the upper limit temperature. Is a high-speed operation of the auxiliary blower.

(E) Example An example will be described with reference to the drawings. FIG. 8 shows a sectional view of the refrigerator (1). The refrigerator (1) incorporates a synthetic resin inner box (3) in a steel plate outer box (2) with a space between both boxes (2).
A urethane heat insulating material (4) is foam-filled between (3) to form a heat insulating box. The inside of the refrigerator (1) is divided into upper and lower parts by a partition wall (5) filled with a heat insulating material, and a freezing room (F) which is cooled to a freezing temperature (for example, -20 ° C) upwards,
A refrigerating chamber (R) which is maintained at a refrigerating temperature above the freezing point (for example, + 3 ° C) is formed below. A part of the refrigerator (1), which is a part of the refrigerator, has a partitioning member that extends across the left and right sides of the opening edge of the refrigerator compartment (R).
(8) is erected, and is supported by the pre-partitioning member (8) and the concave groove (3a) formed in the inner box (3) at substantially the same height as this partition plate (9) having heat insulating properties. Is attached, and the compartment plate (9) divides the refrigerating compartment (R) into upper and lower compartments. In the space above the partition plate (9), a cold air passage (10) is formed with a space between the lower surface of the partition wall (5), the upper surface of the partition plate (9), both side surfaces of the inner box (3) and the rear surface, and Box-shaped case (11) made of heat conducting material such as
Is incorporated. The opening edge of the case (11) is brought into contact with the inner box (3), the partition wall (5) and the partition plate (9), whereby the compartment (communication inside the case (11) communicates only with the outside of the compartment ( H) is formed, and the front end edge of the cold air passageway (10) is closed.

Above the partition wall (5), a bottom plate (13) of the freezer compartment (F) having a heat insulating material on the lower surface is provided at a distance and a cooling chamber is provided between the bottom plate (13) and the partition wall (5). (14) is formed. This cooling room (14)
A cooler (15) included in the refrigeration cycle is housed and installed therein, and a main blower (16) is provided behind the cooler (15). The motor (16M) that drives the main blower (16) is the cooling chamber.
It is located in the rear of (14) and is installed inside the outer box (2) backside and stored in the storage box (17) embedded in the heat insulating material (4),
The rotary shaft penetrates the storage box (17), the heat insulating material (4) and the inner box (3) to face the inside of the cooling chamber (14), and a blower fan (16F) is attached to the tip thereof. The main blower (16) rotates and sucks cool air from the rotation axis direction and blows it out in the radial direction. The rear side (13a) of the bottom plate (13) of the freezing compartment (F) rises upward with a space from the rear surface of the inner box (3), and a duct (which connects the rear part of the cooling chamber (14) and the freezing compartment (F) ( 18) is formed, and the cold air accelerated by the main blower (16) is discharged into the freezer compartment (F) from the discharge port (18a) at the tip of the duct (18). (19) is a duct that is attached to the back of the inner box (3) and connects the rear part of the cooling room (14) and the refrigerating room (R).
In the duct member forming (20), the cold air accelerated by the main blower (16) passes through the duct (20), and is discharged from the discharge port (20a) formed in the upper rear part of the refrigerating chamber (R) into the refrigerating chamber (R). Is discharged. A discharge port (20b) is formed in the upper portion of the rear surface of the inner box (3) behind the cold air passageway (10) so as to connect the cold air passageway (10) and a midway portion of the duct (20).

The amount of cold air discharged from the discharge port (20a) is adjusted by the electromagnetic damper (35). The electromagnetic damper (35) is fixed to the plunger (not shown) or electromagnetic coil (35A) housed in the case (36) and the tip of the arm (37) attached to the plunger to open and close the discharge port (20a) (a baffle plate ( 38) and. (39)
Is an auxiliary blower provided behind the discharge port (20b). The motor (39M) that drives the auxiliary blower (39) is located behind the discharge port (20b) and is installed inside the back of the outer box (2) and inside the heat insulating material (4) inside the storage box (40). The rotating shaft is stored in the storage box (4
0), through the heat insulating material (4) and the duct member (19), the duct (2
Blower fan (30F) is attached to the end of the fan. The auxiliary blower (39) rotates to blow a part of the cool air flowing down the duct (20) forward and circulate it through the discharge port (20b) into the cool air passage (10). In this way each room
Cold air is discharged into (F), (R) and the cold air passageway (10), and the freezer compartment (F)
The cold air that circulates through the cold air passage (10) and the cold air passage (10) are cooled directly by cooling the freezing chamber (F), and the compartment (H) is cooled by the indirect cooling from the case (11), and then cooled in front of the cooling chamber (14). The cold air suction ports (22) and (23) communicating with each other return to the cooling chamber (14). refrigerator
In the heat insulation material (4) on the side wall of (1), there is formed a return duct (24) connecting the refrigerating compartment (R) and the front part of the cooling compartment (14), and passing through this, inside the refrigerating compartment (R). The cold air of the is returned to the cooling chamber (14) from the suction port (25). (26) is a compressor included in the refrigeration cycle, (27)
(28) and (29) are doors that open and close the front openings of the chambers (F) (H) (R).

FIG. 2 shows an electric circuit diagram of the temperature controller (TC).
(41) (42) (43) are triacs and compressor motors (2
6M), the electromagnetic coil (35A) of the electromagnetic damper (35), and the main blower motor (16M) constitute a series circuit to form an AC power supply (A
Connected to C). A transistor (44) is connected to the DC power supply ( _Vcc ) in series with the auxiliary blower motor (39M). (45) is a well-known microcomputer, and its output terminal (OUT ₁ )
Triacs (41) (42) (4) to (OUT ₂ ) (OUT ₃ ) (OUT ₄ ) respectively
The gate of 3) and the base of the transistor (44) are connected. (46) (47) (48) are comparators composed of operational amplifiers, whose output terminals are
Connected to the input terminal (IN ₁ ) (IN ₂ ) (IN ₃ ) of 5). (49) (50)
(51) is a thermistor (negative resistance element) as a sensor for detecting the temperature inside the compartment (H), the refrigerator (F) and the refrigerating room (R), respectively, and the thermistor (49) (50) (51 ) Terminal potential (V
₁ ) (V ₂ ) (V ₃ ) are connected to the inverting input terminals (-) of the comparators (46) (47) (48), respectively. In addition, the comparator (47) (4
The set potential (V ₅ ) (V ₆ ) is input to the non-inverting input terminal (+) of 8). (r ₁ ) (r ₂ ) (r ₃ ) is a resistor connected in series,
switching means for (r ₃₎ (SW ₁₎ is also resistance (r ₂₎ switch means for (r ₃₎ (SW ₂₎ is connected in parallel, the terminal potential
(V ₄ ) is connected to the non-inverting input terminal (+) of the comparator (46). Output terminals (OUT ₅ ) (OUT ₆ ) of the microcomputer (45) are connected to the switch means (SW ₁ ) (SW ₂ ), respectively.
Triacs (41) (42) (43) are microcomputers (45)
The gate is triggered by the switch to conduct electricity to the motor (26M), the electromagnetic coil (35A) and the motor (16M). Electromagnetic coil
(35A) is energized, the electromagnetic damper (35) operates, and the discharge port
(20a) is opened, and the discharge port (20a) is closed in the non-energized state. The transistor (44) turns on the motor (39M) while the output terminal (OUT ₄ ) is in a low potential (hereinafter referred to as “”). The comparators (47) and (48) have a certain hysteresis, and the comparator (47) raises the temperature (TF) of the freezer compartment (F) to (V ₅ )> (V ₂ ) and outputs the output. and "h", descends become a _{(V 5) <(V 2} ) to "". Similarly, the temperature (TR) of the refrigerator compartment (R) rises in the comparator (48).
(V ₆ )> (V ₃ ), the output becomes “h” and descends (V ₆ ) <(V
It is called "" in ₃ ).

The microcomputer (45) constantly switches the output generated at the output terminals (OUT ₅ ) and (OUT ₆ ), (OUT ₆ ) is "h" and (SW ₂ ) is closed, (OUT ₅ ) Is "h" (OU
(T ₆ ) is (), (SW ₁ ) is closed, (SW ₂ ) is open, and (OU
T ₅ ) (OUT ₆ ) are both “” and (SW ₁ ) (SW ₂ ) are both open. Terminal potential of the resistor this by _{(V 4) (r 1)} , terminal potential of the resistor (r ₁₎ and (r _2), the resistance
(r ₁ ) (r ₂ ) (r ₃ ) terminal potential is repeatedly increased and decreased, and the temperature of the compartment (H) is divided into four regions as shown in Fig. 9 according to the output state of the comparator (46) at this time. Detect separately. That is, as shown in FIG. 3, the state of each potential (V ₄ ), the output of the comparator (46) and the temperature (TH) of the compartment (H) at that time, the temperature (T
When (H) is higher than the temperature (TH ₀ ) such as 0 ° C, (V ₄ )> (V ₁ ) in all states and the output of comparator (46) is “h”.
Is. If the temperature (TH) is (TH ₀ ), for example, the temperature (TH ₁ ) such as -1 ℃
Is between the terminal potential of the resistor (r ₁ ) and between the temperature (TH) (TH ₁ ) and the temperature (TH ₂ ) such as -2 ℃. Comparators (46) also for (r ₁ ) and (r ₂ ).
The output of is “”, and when the temperature (TH) is lower than (TH ₂ ), it is “” even when the resistance is (r ₁ ) (r ₂ ) (r ₃ ). In this way, the temperature range of (TH) is constantly determined by the change in the output of the comparator (46) depending on the state of each (V ₄ ). The electric potential generated at the output terminal (OUT ₄ ) of the microcomputer (45) changes in three kinds of states: a continuous “h” state, an intermittent “” pulse state and a continuous “” state. That is, in the continuous "" state, the transistor (44) does not energize the motor (39M), so the motor (39M) is stopped. In the "" pulse state, the motor (39M) is intermittently energized to rotate at medium speed. Motor in continuous "h" state
(39M) is continuously energized and rotates at high speed.

FIG. 4 shows a functional block diagram of the temperature controller (TC). (55) (56) (57) are the freezer temperature detecting means, the compartment temperature detecting means and the refrigerating room temperature detecting means including the thermistor (50) (49) (51) respectively, and (58) is a comparator ( 46), resistance (r ₁ ) (r ₂ ) (r ₃ ), switch means (SW ₁ ) (SW ₂ ), transistor (44), etc. (60) (61) (6
Reference numeral 2) is a switching means that includes the triacs (41), (43) and (42), respectively, and drives the motors (26M) (16M) and the electromagnetic coil (35A). The comparator (47) compares a predetermined set value with the information from the freezer compartment temperature detecting means (55) and operates the switching means (60) (61) to energize the motors (26M) (16M). The comparator (48) also compares the predetermined set value with the information from the refrigerating room temperature detecting means (57) and switches it.
Operate (62) to energize the electromagnetic coil (35A). The compartment temperature control means (58) is in what temperature range the temperature (TH) is based on the information from the compartment temperature detection means (56) (that is, the rising tendency or the falling tendency or higher than the upper limit temperature). Or lower than the lower limit temperature) to drive the auxiliary blower motor (39M).

5 to 7 are flowcharts showing the software of the microcomputer (45), and the operation will be described along with it. Fig. 5 is a flow chart of the temperature control of the freezer compartment (F), where (TF _N ) is the current temperature of the freezer compartment (F) and (TF _N-1 )
Is the temperature at the time of the previous sampling, and sampling is performed when the power is turned on and when each set temperature is crossed,
After performing the processing work, the temperature (T
The current temperature (TF _N ) shall be stored instead of F _N-1 ). Hereinafter, the same applies to the temperature (TR) of the refrigerator compartment (R) and the temperature (TH) of the compartment (H). Current temperature (TF _N ) in step (S ₁ )
Is above the upper limit temperature (TF _ON ) such as -18 ° C, (V ₅ )>
(V ₂ ) and the input terminal (I
N ₂ ) is “h”, so proceed to step (S ₂ ), and output terminal
(OUT ₁ ) (OUT ₃ ) becomes `` '' to trigger the triac (41) and triac (43), and the compressor (26) and main blower (16)
To perform the cooling operation. When the temperature (TF) drops below (TF _ON ) due to this cooling operation, the process proceeds from step (S ₁ ) to step (S ₃ ) where the lower limit temperature (TF) such as −22 ° C.
_OFF ), and if it is higher than that, proceed to step (S ₄ ) and compare the temperatures (TF _N-1 ) and (TF _OFF ) at the previous sampling. At this time, (TF _N-1 ) was greater than (TF _ON ), so step
If the cooling operation continues from (S ₄ ) to (S ₂ ), and (TF) continues to drop, but (TF _OFF ) or less, (V ₂ )> (V ₅ ) and the input terminal (IN ₂ ) Becomes “”, so proceed to step (S ₅ ),
At step (S ₅ ), the output terminals (OUT ₁ ) (OUT ₃ ) become “h” and the compressor (26) and the main blower (16) are stopped. Then the freezer
When the temperature (TF) of (F) gradually rises and rises above (TF _OFF ), the process proceeds from step (S ₃ ) to (S ₄ ), where (TF _N-1 ) is below (TF _OFF ). Go to step (S ₅ ), compressor (26) and main blower
(16) remains stopped. After that, it further rises (TF
_When it is above ( _ON ), the process proceeds from step (S ₁ ) to (S ₂ ) and the cooling operation is started again. By repeating the above, the inside of the freezer compartment (F) is cooled to, for example, -20 ° C on average.

FIG. 6 is a temperature control flowchart of the refrigerating room (R). When the current temperature (TR _N ) is above the upper limit temperature (TR _ON ) such as + 5 ° C. in step (S ₇ ), (V ₆ )> ( V ₃ ) and the input terminal (IN ₃ )
Electromagnetic damper (3 proceed because There is an "h" in step (S ₈₎
5) is opened and cold air is supplied into the refrigerating room (R). Then (TR _N )
When (TR _ON ) is less than or equal to (TR _ON ), the process proceeds from (S ₉ ) to (S ₁₀ ).
_N-1) remains open electromagnetic damper (35) proceeds to (because it is above the TR _ON) Step (S _8). After that, if (TR _N ) becomes less than (TR _OFF ) such as + 1 ° C, (V ₃ )> (V ₆ ) and the input terminal (IN ₃ ) becomes “”, and steps (S ₉ ) to (S ₁₁ )
And the output terminal (OUT ₂ ) becomes "h" and the electromagnetic damper
Close (35). After that, even if (TR _N ) becomes (TR _OFF ) or more again, (TR _{N -1} ) was below (TR _OFF ), so step (S ₁₀ )
To (S ₁₁ ), the electromagnetic damper (35) remains closed. After that, when (TR _N ) becomes (TR _ON ) or more, (V ₆ )> (V ₃ ), so the process proceeds from step (S ₇ ) to (S ₈ ) and the electromagnetic damper again.
Open (35). By repeating this, the inside of the refrigerating room (R) is maintained at + 3 ° C or the like.

Next, the temperature control of the compartment (H) in FIG. 7 will be described with a flowchart. In step (S ₁₂ ), the current temperature (TH _N ) is (T _N
When the temperature is higher than (H ₀ ) (0 ℃), proceed to step (S ₁₃ ) and output terminal
(OUT ₄ ) becomes a continuous “h” output state and the auxiliary blower (3
Rotate 9) at high speed. In this state, a large amount of cool air is blown from the discharge port (20b) to the cool air passageway (10), and the compartment (H) is rapidly cooled. When (TH _N ) falls below (TH ₀ ) due to this cooling, the process proceeds from step (S ₁₂ ) to (S ₁₄ ), but since (TH _N ) is higher than (TH ₁ ), the process proceeds to step (S ₁₅ ). At this time (TH _N-1 ) becomes (T
Since it was above (H ₀ ), proceed to step (S ₁₃ ), and then the auxiliary blower
(39) continues to cool at high speed. Then (TH _N ) becomes (TH ₁ )
When it becomes lower than (-1 ° C), the process proceeds from step (S ₁₄ ) to (S ₁₆ ) to step (S ₁₇ ), and at this time (TH _N-1 ) is (TH ₁ ) or more, step (S ₁₈ ) Proceed to and the output terminal (OUT ₄ ) will be in the “” pulse state, and the auxiliary blower (39) will rotate at medium speed. This slows down the cooling rate of the compartment (H).
After that, when cooling gradually progresses and (TH _N ) becomes lower than (TH ₂ ), the process proceeds from step (S ₁₆ ) to step (S ₁₉ ), and the output terminal (OUT ₄ )
Becomes a continuous "" output state and stops the auxiliary blower (39). As a result, the cold air supply to the cold air passage (10) is stopped, so the temperature (TH) of the compartment (H) begins to rise again,
When it becomes higher than (TH ₂ ) again, step (S ₁₆ ) to step (S
Proceeds to _17), this time (TH _N-1) is (TH ₁₎ than because it was naturally low flow advances to step (S ₁₉₎ still auxiliary blowers (39) remains stopped. When the temperature (TH) rises further and becomes (TH ₁ ) or higher, the process proceeds from step (S ₁₄ ) to (S ₁₅ ), but (TH _N-1 ) is lower than (TH ₀ ), so the process proceeds to step (S ₁₈ ). With Auxiliary Blower (39)
Is set to a medium speed rotation, and cold air is gradually introduced from the discharge port (20b). This slows down the rate of temperature (TH) rise,
When the temperature rises gradually to (TH ₀ ) or more, the process proceeds from step (S ₁₂ ) to (S ₁₃ ) and the auxiliary blower (39) is rotated at high speed to introduce a large amount of cold air into the cold air passageway (10). Cool the room (H) vigorously. After that, this is repeated. This allows compartments (H)
The inside is cooled at about -1 ° C on average. Where this -1 ℃
Is the ice storage temperature of meat and fish. This ice storage temperature is the temperature zone below freezing, but the goods do not freeze, and by storing food at this temperature the flavor is not impaired, there is no need to thaw, and long-term (in experiments It can be stored for about a week).

As described above, the inside of the compartment (H) is maintained at the ice temperature storage temperature by the indirect cooling from the cold air passage (10), so that the food can be stored for a relatively long period of time without impairing the flavor. Further, since the cooling is indirect, the drying of food is also suppressed. Further, since the auxiliary blower (39) is controlled by the temperature of the compartment (H), the temperature of the compartment (H) can be favorably maintained in the ice temperature storage temperature zone having a relatively narrow temperature range. In addition, since the rotation speed of the auxiliary blower (39) is adjusted and controlled, a large amount of cold air is discharged into the cold air passage (10) near the upper limit temperature, and the amount of cold air discharged is decreased near the lower limit temperature. In comparison with the control that stops the fan at the lower limit temperature, the so-called overshoot and undershoot, which are transient phenomena near the upper limit temperature or the lower limit temperature, are suppressed and the compartment (H) temperature becomes more stable. Will be controlled.

(F) Effect of the invention According to the present invention, the temperature control device, when the judgment result in the control means is in a downward trend, when the temperature of the compartment is equal to or higher than the set temperature, the temperature detected by the freezer sensor Regardless of the above, the auxiliary blower is operated at high speed, when the temperature is above the lower limit temperature and below the set temperature, the auxiliary blower is operated at medium speed, and when it is below the upper limit temperature, the auxiliary blower is stopped, and the judgment result by the control means tends to increase. When the temperature of the compartment is below the set temperature, the auxiliary blower is stopped, when it is above the set temperature and below the upper limit temperature, the auxiliary blower is operated at medium speed, and when it is above the upper limit temperature, the auxiliary blower is turned on. Since the high-speed operation is performed, the rotation speed of the auxiliary blower can be changed stepwise based on the temperature of the compartment to change the amount of cold air flowing to the cold air passage stepwise. Particularly in the vicinity of the upper limit temperature, a large amount of cold air can be supplied to the cool air passage, and in the vicinity of the lower limit temperature, the amount of cool air to the cool air passage can be reduced. Therefore, a transient phenomenon of temperature near the upper limit temperature or the lower limit temperature (so-called over temperature Shoot or undershoot) can be suppressed. Furthermore, when the auxiliary blower is operating, the auxiliary blower operates even if the temperature of the freezer drops below the set temperature and the compressor and main blower stop. Since the residual cooling power can be recovered from the retained refrigerant and supplied to the cold air passage, it is possible to quickly cool the compartment by eliminating the insufficient supply of cold air to the cold air passage of the compartment and the insufficient cooling of the compartment. Becomes Based on these, the temperature control accuracy of the compartment is improved as compared with the conventional case, and it becomes easier to stabilize the temperature of the compartment in the ice temperature storage temperature zone having a relatively narrow temperature range.

[Brief description of drawings]

Each drawing shows an embodiment of the present invention. FIG. 1 is an enlarged sectional view of the rear part of the compartment, FIG. 2 is an electric circuit diagram, and FIG.
FIG. 4 is a diagram showing the output state of the comparator (46), FIG. 4 is a functional block diagram of FIG. 2, and FIGS. 5 to 7 are flowcharts showing the software of the microcomputer.
FIG. 8 is a schematic side sectional view of the refrigerator, and FIG. 9 is a diagram showing a time transition of compartment temperature. (H) ... compartment, (TC) ... temperature control device, (10) ... cool air passage, (15) ... cooler, (39) ... auxiliary blower.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norio Matsumoto 180 Sakata, Odaizumi-cho, Ora-gun, Gunma Toyo Sanyo Electric Co., Ltd. (56) Reference JP 60-159575 (JP, A) 58-76082 (JP, U) Actually opened 58-74089 (JP, U) Actually opened 57-148689 (JP, U)

Claims (1)

[Claims] 1. A refrigerator provided with a temperature control device for partitioning the inside of a heat-insulating box into two compartments, a freezer compartment and a refrigerating compartment, and controlling a compressor and a main blower based on the temperature of the freezer compartment detected by a freezer compartment sensor. In, the compartment formed in the heat-insulating box in a substantially sealed manner, the cold air passage formed around the compartment to indirectly cool the compartment, and the amount of cold air to the cold air passage is controlled. Auxiliary blower, a compartment sensor that detects the temperature in the compartment, a fixed temperature higher upper limit temperature and a constant temperature lower lower limit temperature with respect to the set temperature of the compartment, respectively, the temperature of the compartment rises And a control means for determining whether the temperature is lowering, the temperature control device, when the judgment result of the control means is a lowering temperature, when the temperature is equal to or higher than the set temperature, the temperature detected by the freezer compartment sensor. Nikakawa It said auxiliary blower at a high speed operation,
When the temperature is lower than the lower limit temperature and lower than the set temperature, the auxiliary blower is operated at a medium speed, and when the temperature is lower than the lower limit temperature, the auxiliary blower is stopped, and when the judgment result by the control means tends to increase, When the temperature is lower than the set temperature, the auxiliary blower is stopped, when the temperature is equal to or higher than the set temperature and lower than the upper limit temperature, the auxiliary blower is operated at a medium speed, and when the temperature is higher than or equal to the upper limit temperature, the auxiliary blower is operated at high speed to separate the compartment. A refrigerator characterized by being maintained in an ice storage temperature range.