JPH0680356B2 - Cold storage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a cooling storage for controlling a temperature of a chamber by controlling a supply amount of cold air for cooling the chamber.

(B) Conventional Technology In a conventional cold storage of this kind, the room is cooled by directly supplying cold air into the storage chamber or by supplying cold air to a cold air passage that indirectly cools the storage chamber. In this way, the temperature control in the case of cooling the storage chamber by forcibly circulating the cool air has been conventionally performed by a damper thermostat as disclosed in Japanese Utility Model Laid-Open No. 60-54078.

(C) Problems to be Solved by the Invention The damper thermostat as disclosed in the above publication detects the temperature in the storage chamber by a capillary tube which is a heat-sensitive tube containing gas, and compresses and expands the gas according to the temperature change in the chamber. The bellows is compressed and expanded by using the, and the damper is driven thereby to open and close the cool air discharge port to control the amount of cooling supply to the room to control the temperature of the storage room. Since the phase change of the gas through the gas is used, the response to the temperature change is slow, and since the accuracy is low, it is difficult to change the temperature setting and the control temperature is not stable.

Further, when a plurality of storage chambers are formed in the storage, separate damper thermostats must be attached to the respective chambers, which causes problems in terms of installation space and cost.

(D) Means for Solving the Problems The cooling storage of the present invention includes a cooled chamber (F, P, R) surrounded by a heat insulating box and a door and divided into a plurality of parts, and cool air cooled by a cooler. A plurality of ducts (18, 19, 2 that guide the
0, 21) and a pair of opening and closing for independently opening and closing the two cool air discharge ports (20a, 20b) formed in the duct for guiding the cool air to the two cooled chambers (P, R) of the plurality of ducts. Material (7
1A, 71B), a single motor (61) that shifts the drive timing of the pair of opening / closing members to each other and stops the pair of opening / closing members at any of four or more arbitrary positions, and the two cooled chambers ( A pair of temperature detection means (75,50) for detecting the temperature of (P, R)
And a time for driving the motor based on the temperatures detected by the pair of temperature detecting means and the set temperatures of the two chambers to be cooled, and the motor is operated for the driving time determined here to operate the pair of opening / closing members. And a control device for controlling the stop position of.

(E) Operation As described above, according to the present invention, the driving timings of the pair of opening / closing members are mutually shifted, so that the cooling air supply to the two cooled chambers can be independently controlled by one motor. In addition to independently controlling the temperatures of these two cooled chambers, since the pair of opening / closing members do not move at the same time, the driving load applied to the motor is reduced and the heat generation amount of the motor is suppressed, while the tamper device is used. As a result, it is possible to promote downsizing and reduce the installation space in the cooling storage. Further, the control device determines a time for driving the motor based on the detected temperature detected by the pair of temperature detecting means and each set temperature of the two cooled chambers, and operates the motor for the determined driving time, The position at which the pair of opening / closing members stops is controlled to be any one of four or more arbitrary positions,
Coupled with the fact that the drive timings of the pair of opening / closing members are mutually shifted, the cooling air supply to each cooled chamber is appropriately controlled based on the temperatures of the two cooled chambers to improve the temperature control accuracy of both chambers. is doing.

(F) Example Refrigerator (1) as an example of a cooling storage in the drawings
Will be described. FIG. 7 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, and foams a urethane heat insulating material (4) between both boxes (2) and (3). Filled to form an 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 inside, and a freezer compartment (F) that is cooled to a freezing temperature (for example, -20 ° C) and a lower part. Refrigeration temperature above freezing (eg +
Forms a refrigerating chamber (R) maintained at 3 ° C. A partition member (8) is installed across the left and right of the opening edge of the refrigerating compartment (R), which is a part of the refrigerator (1), and this partition member (8) and this partition member are substantially the same. A partition plate (9) having a height and supported by a concave groove (3a) formed in the inner box (3) and having heat insulation
Is attached, and the refrigerating compartment (R) is divided into upper and lower parts by this partition plate (9). In the space above the partition plate (9), a cool air passage (10) is formed at a distance from 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 A box-shaped case (11) having an opening is installed. The opening edge of the case (11) has an inner box (3) and a partition wall (5).
And the partition plate (9), thereby forming a partition chamber (P) in the case (11) that communicates only with the outside of the refrigerator, and closes the front end of the cold air passage (10).

A bottom plate (13) of a freezer compartment (F) having a heat insulating material on the lower surface is provided above the partition wall (5) with a space therebetween, and a cooling chamber is provided between the bottom plate (13) and the partition wall (5). (14) is formed.
A cooler (15) included in the refrigeration cycle is housed and installed in the cooling chamber (14), and a blower (16) is provided behind the cooler (15). The motor (16M) that drives the blower (16) is located behind the cooling chamber (14) and is installed inside the rear surface of the outer box (2) and is embedded in the heat insulating material (4) inside the storage box (17). The rotating shaft is stored in (1
7), penetrating the heat insulating material (4) and the inner box (3),
4) It faces inside, and a blower fan (16F) is attached to its tip. The blower (16) rotates, 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 freezer compartment (F) rises upward with a space from the rear surface of the inner box (3) and connects the rear part of the cooling room (14) and the freezer compartment (F) ( 18) is formed, and the cold air accelerated by the blower (16) is discharged into the freezer compartment (F) through the discharge port (18a) at the tip of the duct (18). (19) is a duct member that forms a duct (20) that connects the rear part of the cooling chamber (14) and the cool air passageway (10). The cool air accelerated by the blower (16) is an inner box behind the cool air passageway (10). (3) Cool air passage (10) from the cool air discharge port (20a) formed in the upper part of the rear surface
Is discharged inside. Reference numeral (21) is a duct material that constitutes a duct (21b) that guides a part of the cool air from the duct (20) to the refrigerating chamber (R), passes through the inside of the heat insulating material (4) downward, and is discharged from the discharge port (21).
From a), cool air is discharged into the refrigerator compartment (R). Freezer (F)
The cold air that circulates through the cold air passage (10) and the freezing chamber (F) are directly cooled, and the compartment (P) is cooled by the penetration cooling from the case (11), and then the front part of the cooling chamber (14). It returns to the cooling chamber (14) through the cold air intake ports (22) and (23) communicating with, respectively. In the heat insulating material (4) on the side wall of the refrigerator (1), there is formed a return duct (24) which connects the refrigerating room (R) and the front part of the cooling room (14), and passes through the refrigerating room (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) (29)
Are doors that open and close the front openings of the chambers (F) (P) (R). In the embodiment, the compartment (P) is structured to be indirectly cooled, but the case (11) is removed, and the inside of the case (11) and the entire cold air passageway (10) are compartmented (P).
Alternatively, cooling may be performed by directly introducing cold air.

FIG. 2 shows an electric circuit diagram for temperature control of the freezer compartment (F). In FIG. 2, reference numeral (40) is a negative characteristic thermistor for detecting the temperature in the freezer compartment (F), which is connected between the DC power supply (Vcc) and the grounded resistor (41) and has a terminal potential of the resistor (41). Is input to the (-) input terminal of the comparator (42), and the installation potential determined by the resistors (43) and (44) is input to the (+) input terminal of the comparator (42). The comparator (42) has a hysteresis due to the positive feedback resistor (45), and its output is connected through the resistor (46) to the gate of the triac (48) for triggering the gate of the triac (47). A parallel circuit of a series circuit of a motor (26M) for driving a compressor, a motor (16M) of a blower (16) and a relay switch (121) is connected to the triac (47) in series with an AC power source. The temperature of the freezer compartment (F) of the comparator (42) is, for example, −
Output is low potential (above 18 ℃) (hereinafter referred to as "L").
Then, the triacs (48) and (47) are triggered to drive the motors (26M) and (16M). For example, when the temperature becomes -22 ° C or lower, the output becomes a high potential (hereinafter referred to as "H"), and the triac (48M). ) (47) becomes non-conducting and motor (26M) (1
6M) stop. The freezing room (F) is thus -20 on average.
It is cooled to ℃.

A discharge port (20b) having a smaller opening area is formed in parallel with the discharge port (20a) in the duct (20), and the discharge port (20b) is covered with the duct member (21) described above, that is, the discharge port. Cold air from (20b) is guided to the duct (21b) and discharged from the discharge port (21a) into the refrigerating chamber (R). Further, the amount of cold air discharged from the discharge ports (20a) (20b) is controlled to be opened and closed by the damper device (35). 3 to 5 show a front sectional view and a side sectional view of two parts of an embodiment of the damper device (35). (60) is discharge port (20a) (20b)
This case (60) is a case that is embedded in the heat insulating material (4) through the opening (3a) formed in the lower inner box (3).
Inside the AC motor (6a) with the drive shaft (61a) protruding forward
1), a small-diameter bevel gear (62) attached to the tip of the drive shaft (61a), a bevel gear (62) fixed to a rotary shaft (63) extending left and right in the case (60), and a case ( 6
A large-diameter bevel gear (64) fixed to a rotary shaft (63) extending in the left and right direction and meshing with the bevel gear (62) is housed. The bevel gears (62) and (64) constitute a reduction mechanism (65), and the rotation of the motor (61) is controlled by the rotation shaft (6).
3) Convert to rotation. In addition to the cam (66
A) (66B) is fixed on the right and left side by side. Cam (66
Both A) and (66B) are deformed discs with a predetermined thickness. For example, each has a small-diameter circular arc portion and a large-diameter circular arc portion as the central angle, and each has 90 ° symmetrically about the axis (63). It has a shape smoothly connected by an arc of a larger diameter,
The cam (66B) is fixed 90 ° counterclockwise in Fig. 4 or 5 with respect to (66A). As a result, the cams (66A) and (66B) will move to each other due to rotation during rotation.
The rotation movement is 90 ° out of phase.

Reference numeral (67) is a partition wall which divides a portion located in the cold air passage (10) at the front of the case (60) and a portion of the case (60) in which the rear cams (66A) (66B) are housed. The partition wall (67) prevents the cold air from flowing into a portion where the cams (66A) (66B) and the like are stored, thereby preventing freezing. In the front of the partition wall (67), the lower end is fixed to the case (60) rotatably in the front-rear direction by shafts (68A) (68B), and ducts (not shown) are formed from the notches (69A) (69B) of the case (60). 21b) and the arms (70A) and (70B) that project into the cold air passage (10) are arranged in parallel, and serve as opening and closing members for opening and closing the discharge ports (20b) and (20a) at the upper ends of the arms (70A) and (70B), respectively. Small area baffle plate (71A) and relatively large area buffer plate (71B)
Is attached. The lower portions of the arms (70A) (70B) are connected to the partition wall (67) by springs (72A) (72B) and are constantly urged in a direction to close the discharge ports (20b) (20a).
(73A) and (73B) are moving rods penetratingly installed in the partition wall (67) so as to be movable back and forth, and (73A) is a cam (66A) and an arm (70
A) and (73B) slidably contact the cam (66B) and arm (70B), respectively. The baffle plates (71A) and (71B) of (74A) and (74B) respectively have discharge ports (20b) (2
It is a switch that closes the contacts (174A) (174B) when 0a) is closed. This switch (74A) (74B) is a cam (66A)
The closing of the baffle plates (71A) (71B) may be detected by contacting with (66B). The duct member (21) has a cold air passage (1
0) located in the discharge port (20b), baffle plate (71A),
Arm (70A), part of case (60) and case (60)
A portion (21) that covers the through hole (3b) formed in the lower inner box (3).
1) and a portion (212) that is embedded in the heat insulating material (4) and connects the through hole (3b) and the discharge port (21a), and a series of ducts (21b) are formed by both.

The states of the cams (66A) (66B) and the baffle plates (71A) (71B) with respect to the rotation angle of the rotation shaft (63) will be described with reference to FIG. Here, the moving rod (73A) is located at the innermost position when it is in contact with the small-diameter circular arc portion of the cam (66A), and at this time, the arm (70A) is pulled back by the spring (72A) and the baffle plate (71A). ) Closes the discharge port (20b), and is pushed out most when it is in contact with the large-diameter circular arc part (70A)
Press to open the discharge port (20b). This also applies to the cam (66B), the moving rod (73B), the arm (70B), the baffle plate (71B), and the discharge port (20a).
Further, the cams (66A) (66B) are supposed to rotate counterclockwise in FIG. 6 by the rotation of the rotary shaft (63).

In Fig. 6, when the rotation angle is 0 °, the moving rod (73A) is
A) Abutting on the starting end of the small-diameter circular arc part, while moving rod (73B)
Is in contact with the end of the small-diameter arc of the cam (66B),
Baffle plates (71A) (71B) are compatible with discharge ports (20b) (20b)
a) is closed. When the rotation angle is 90 °, the moving rod (73A) abuts the end of the small-diameter circular arc portion of the cam (66A),
3B) is in contact with the start end of the large-diameter arc of the cam (66B), the baffle plate (71A) closes the discharge port (20b), and the baffle plate (71B) opens the discharge port (20a). At 180 °, the moving rod (73A) is in contact with the start end of the large-diameter circular arc portion of the cam (66A), and the moving rod (73B) is in contact with the end of the large-diameter circular arc portion of the cam (66B). 71A) and (71B) open the discharge ports (20b) and (20a) for both sides. When the rotation angle is 270 °, the moving rod (73A) abuts the end of the large-diameter circular arc portion of the cam (66A), and the moving rod ( 73B) is in contact with the starting end of the small-diameter arc part of the cam (66B), and the baffle plate (71B) is the discharge port (20a).
Open and the baffle plate (71B) closes the discharge port (20a).
It returns to the original state by rotating 360 °, and the baffle plate (71A) (71
B) closes the discharge ports (20b) (20a). Thus, the baffle plates (71A) (71B) make periodic movements having a phase difference with each other.

FIG. 1 shows an electric circuit diagram for controlling the temperature of the compartment P and the refrigerating room R, and S shows the temperature detected by the negative characteristic thermistors 75 and 50 as a pair of temperature detecting means which will be described later and two cooled chambers (that is, Motor based on the set temperatures of compartment P and refrigerator R)
Decide the time to drive 61 and motor 61
Is a control device that controls the stop positions of the baffle plates 71A and 71B as a pair of opening / closing members by operating the above. The details will be described below. (75) is a negative characteristic thermistor that substantially detects the temperature in the compartment (P) by the temperature in the compartment (P), the temperature in the cold air passage (10), etc., and is divided by the resistance (76). The terminal potential of the thermistor (75) is input to the (-) input terminal of the comparator (77). Comparators (77)
The set potential determined by the resistors (78) and (79) is input to the (+) input terminal of. The comparator (77) has a positive feedback resistor (8
(0) has hysteresis, and its output is input to AND gates (81) (82), and further inverter (8
It is input to the AND gates (84) and (85) via 3). On the other hand, (50) is a negative characteristic thermistor that detects the temperature in the refrigerator compartment (R). The terminal potential of the thermistor (50) divided by the resistance (51) is applied to the (-) input terminal of the comparator (52). Is entered.
The resistors (53) and (54) are connected to the (+) input terminal of the comparator (52).
The set potential determined by and is input. The comparator (52) has hysteresis due to the positive feedback resistor (55), and its output is
It is input to the AND gates (81) (84), and the inverter (5
6) It is inputted to the AND gates (82) (85) via (57). Here, the temperature of the compartment (P) of the comparator (77) is, for example, 0 ° C. and the output is “H”, and the temperature is −3 ° C. and the output is “L”, while the comparator (52) is Cold room (R)
Temperature becomes, for example, + 5 ° C, the output becomes “H”, and +1
Set it so that the output drops to "L" by dropping to ℃.

The outputs of the AND gates (81) (82) (84) (85) are A
It is input to the ND gates (116) (117) (118) (119), and the outputs of the ANDs (116) (117) (118) are input to the AND gates (86) (87) (88), respectively. The outputs of the AND gates (116) (117) (118) (119) are input to the OR gate (93) via the differentiating circuits (89) (90) (91) (92), respectively. The outputs of AND gates (86) (87) (88) pass through differentiating circuits (94) (95) (96) and timers (T ₂ ) (T ₁ )
(T ₃ ) Input to each input terminal. As shown in FIG. 6, the timers (T ₁ ) (T ₂ ) (T ₃ ) are (t ₁ ) (t) from the time when the “H” pulse is input to each input terminal (zero time in FIG. 6). ₂ ) (t ₃ ) time “H” at each output terminal
Each output is input to the OR gate (97). The output of the OR gate (97) is input to the differentiating circuit (98). The output of the OR gate (97) is input to the set terminal of the flip-flop (100) via the differentiation circuit (98), and further input to the reset terminal of the flip-flop (100) via the inverter (102) and the differentiation circuit (103). To be done. The output of the OR gate (97) is further fed to the inverter (105) and the differentiation circuit (1
It is input to the reset terminal of the timer (T ₁ ) (T ₂ ) (T ₃ ) via 06), and each timer (T ₁ ) (T ₂ ) (T ₃ ) has the “H” pulse input to the reset terminal. Will be reset. The flip-flop (100) set terminal has an OR gate (9
The output of 3) is input through the delay circuit (115), and the reset terminal further has contacts (174A) (74B) (174B).
A) (174B) and power supply (Vcc) connected in series with resistor (10
The terminal potential of 8) is input through the differentiation circuit (109). The inverted output of the flip-flop (100) is connected to the gate of the triac (110) connected in series with the motor (61) and the AC power source (AC), and the inverted output is further A
Input to the ND gates (111) (116) (117) (118) (119), and further, the coil (121A) of the relay switch (121).
Is connected to the base of a transistor (120) connected to the collector. The terminal potential of the resistor (108) is further input to the AND gate (111), and the output of the AND gate (111) is input to the AND gates (86) (87) (88). Here, the relay switch (121) is closed by energizing the coil.

Next, temperature control of the compartment (P) and the refrigerating room (R) will be described with reference to the drawings. When the refrigerator (1) is installed and the power is turned on, the flip-flop (100) is set, and the cams (66A) (66B) are at the rotation angle 0 ° in FIG. The plates (71A) (71B) are supposed to close the discharge ports (20b) (20a). In this state, when the temperature of the compartment (P) is 0 ° C. or higher and the temperature of the refrigerating room (R) is + 5 ° C. or higher at zero time, the comparators (77) (52)
The output of the other side becomes "H", and the output of only the AND gate (81) becomes "H". At this time, the inverted output of the flip-flop (100) is "H" and the contacts (174A) (174B) are closed, so the output of the AND gate (111) is "H".
The output of the D gate (116) and (86) becomes "H" timer (T ₂₎ to the "H" pulse is inputted outputs "H" flip-flop (100) is set in an inverted output terminal It becomes “L”, the triac (110) becomes conductive, and the motor (61) starts rotating. AND gate here (116)
An "H" pulse is generated from the OR gate (93) when the output of H becomes "H", but this "H" pulse is delayed by the delay circuit (115) and the flip-flop (100) is set. Since it will be input later, there is no effect on the circuit at this time. This delay time is only for ensuring a short time until the output of the timer (T ₂ ) becomes “H”, and does not necessarily affect other operations, and is not always necessary.

In this way, the motor (61) rotates from the zero time, and thereby the cams (66A) (66B) rotate counterclockwise in FIGS. 4 to 6, and (t ₂ ) time elapses from the start of rotation. the time (t ₂₎ from the output of the timer (T ₂₎ becomes "L" (timer at this point (T ₂₎ is reset), the output of the OR gate (97) is "L", the inverter ( 102)
Output becomes "H", the "H" pulse is input to the reset terminal of the flip-flop (100) to be reset, and the inverting output terminal becomes "H".
0) becomes non-conductive and the motor (61) stops. At this time, the rotation angle of the rotating shaft (63) is 180 °, and the cam (66A)
(66B) is in the state shown by the alternate long and short dash line in FIGS. 4 and 5, and the discharge ports (20b) and (20a) are considerably opened, whereby the inside of the cool air passageway (10) and the duct (21b) are opened. Cold air is introduced into the refrigerating chamber (R) through the discharge port (21a), and the compartment (P) and the refrigerating chamber (R) are cooled. After that, when the temperature in the refrigerating room (R) decreases to + 1 ° C, the output of the comparator (52) is inverted to "L", so that the outputs of the AND gates (82) (117) become "H". . Contact point (174
Since the outputs A and (174B) are open, the output of the AND gate (111) is "L", so the output of the AND gate (87) remains "L". On the other hand, the "H" pulse is input from the OR gate (93) to the set terminal of the flip-flop (100), and is set, and the motor (61) rotates 180 ° as described above.
Baffle plate (71A) once rotated from the position of 360 °
Since both (71B) close the outlets (20b) (20a), the contacts (174A) (174B) close, the flip-flop (100) is reset, and the motor (61) stops as described above. As a result, the output of the AND gate (111) becomes "H", and the outputs of the AND gates (82) (117) become "H" at this time, so the output of the AND gate (87) becomes "H". The "H" pulse is input to the timer (T ₁ ) at time zero in the figure, the output becomes "H", the output of the OR gate (97) becomes "H", and the flip-flop (100) is set. Similarly, the motor (61) rotates. Cam by this (66A) (66B)
When the output of the timer (T ₁ ) becomes “L” at the time (t ₁ ) when (t ₁ ) time has elapsed from the start of rotation, the output of the OR gate (97) becomes “L” and the output of the inverter (102) becomes “L”. It becomes "H", the flip-flop (100) is reset, and the motor (61) stops. The rotation angle at this time is 90 °,
The discharge port (20a) is opened and the discharge port (20b) is closed. As a result, while the cold air supply to the cold air passageway (10) is continued, the cold air supply to the refrigerating compartment (R) is stopped and the temperature drop in the refrigerating compartment (R) is stopped.

After that, when the temperature of the compartment (P) drops to -3 ° C,
Since the output of the comparator (77) becomes "L", the output of the AND gates (85) (119) becomes "H" this time, and the OR gate (9
When the "H" pulse is generated from 3), the flip-flop (100) is set as described above, the motor (61) is rotated, and when rotating from the 90 ° position to 360 °, the baffle plate (7)
1A) and (71B) both close the discharge ports (20b) and (20a), so the contacts (174A) (174B) close and the flip-flop (10B) closes.
0) is reset and the motor (61) stops. When the temperature of the refrigerating room (R) rises to + 5 ° C. from this state, the output of the comparator (52) becomes “H”, and this time the output of the AND gate (84) becomes “H”. At this time, the flip-flop (100) is also reset and the inverted output is "H", so the output of the AND gate (118) becomes "H" and the output of the AND gate (111) also becomes "H". This time, the output of the AND gate (88) becomes “H”, the “H” pulse is input to the timer (T ₃ ) at zero time, the output becomes “H”, and the OR gate (97 ) Output becomes "H". This starts rotating the same motor (61) described above, the rotation start (t ₃₎ output becomes "L" Similarly the time elapsed time (t ₃₎ the output becomes "L" when the OR gate (97) Motor (61) stops. The rotation angle at this time is
270 °, at which time the baffle plates (71A) (71B) are number 4
The discharge port (20b) is open and the discharge port (20a) is closed. As a result, only the refrigerating chamber (R) is cooled with cool air.

From this state, when the temperature of the compartment (P) rises to 0 ° C, the output of the comparator (77) becomes "H", and this time AND
The gates (81) (116) become “H”, and similarly, the “H” pulse from the OR gate (93) sets the flip-flop (100) to rotate the motor (61), and the baffle plate (71A) ( 71B) resets the flip-flop (100) once when the discharge ports (20b) (20a) are closed, and AND
With the output of the gate (111) as "H", the "H" pulse is input to the timer (T ₂ ) by the output of the AND gate (86), and similarly, from the zero time to the time (t ₂ ) in Fig. 6, the motor ( Rotate 61) and rotate 180 °, and then discharge port (20b) (20
Open a) to bring both chambers (R) and (P) into a cooled state.

Hereinafter, this is repeated and the inside of the compartment (P) has an average of −2 ° C. between 0 ° C. and −3 ° C., and the refrigerating chamber (R) has an average of + 3 ° C. between + 5 ° C. and + 1 ° C. Here, 0 ° C. to −3 ° C. is the ice temperature storage temperature zone. Ice temperature storage temperature refers to the temperature that is based on the property that the freezing point of food is lower than the freezing point, but is below freezing but just before freezing of the food.By storing the food in this temperature range, the food is frozen. Without suppressing the reproduction of bacteria, the bacteria can be stored for a relatively long period of time, and the deterioration of flavor due to freezing can be prevented.

Among the above operations, while the output of the timer (T ₁ ) (T ₂ ) or (T ₃ ) is “H”, that is, while the motor (61) is rotating toward the next open state. When the output state of the comparator (77) or (52) changes, the inverted output of the flip-flop (100) is "L", so the AND gate (11
6) The outputs of (117), (118), and (119) do not become "H", and the transition control to the next open state is executed after the motor (61) is once stopped. Further, while the motor (61) is rotating, that is, while the baffle plates (71A) (71B) are moving, the transistor (120) is non-conductive (because the base is "L"), the coil (121A) is de-energized, relay switch (121) is open and blower (1
Since 6) is not operated, cold air inflow due to the error while moving the baffle plates (71A) (71B) can be suppressed as much as possible. Further, since the opening / closing of the discharge ports (20b) (20a) is controlled by the single motor (61) to control the temperature of the chambers (R) and (P), the cost can be reduced, and the cost of the motor (61) can be reduced. The demerits that may be caused by heat generation can be minimized.

(G) Effect of the Invention As described above, according to the present invention, the driving timings of the pair of opening / closing members are mutually shifted, so that the cooling air can be independently supplied to the two cooled chambers by one motor. In addition to being able to control the temperature of these two cooled chambers independently, since the pair of opening / closing members do not move at the same time, the driving load on the motor is reduced and the heat generation amount of the motor is suppressed. As a result, the tampering device can be downsized and the installation space for the cooling storage can be reduced. Further, the control device determines a time for driving the motor based on the detected temperature detected by the pair of temperature detecting means and each set temperature of the two cooled chambers, and operates the motor for the determined driving time, The position at which the pair of opening / closing members stop can be controlled to any one of four or more arbitrary positions, and this is combined with the fact that the drive timings of the pair of opening / closing members are offset from each other. The supply of cold air to each cooled chamber can be appropriately controlled based on the temperatures of the two cooled chambers, and the temperature control accuracy of both chambers is improved.

[Brief description of drawings]

Each drawing shows an embodiment of the present invention, FIG. 1 is an electric circuit diagram for temperature control of compartments and refrigerating rooms, FIG. 2 is an electric circuit diagram for temperature control of a freezing room, and FIG. 3 is a front view of a damper device. A sectional view, FIG. 4 is a sectional view taken along the line AA of FIG. 3, and FIG. 5 is a sectional view taken along the line BB of FIG.
FIG. 6 is a diagram for explaining the operation of the damper device, and FIG. 7 is a side sectional view of the refrigerator. (20b) (20a) ... Discharge port, (35) ... Damper device, (5
0) (75) ... Thermistor, (61) ... Motor, (71A) (71
B) ... Baffle plate, (T ₁ ) (T ₂ ) (T ₃ ) ... Timer,
(P) ... compartment, (R) ... refrigerator.

Claims (1)

[Claims] 1. A cooled chamber (F, P, R) surrounded by an insulating box and a door and divided into a plurality of ducts, and a plurality of ducts (18) for guiding cool air cooled by a cooler to each of these cooled chambers. , 19, 20, 21),
Two cold air discharge ports (20a, 20) formed in the duct for guiding the cool air to the two cooled chambers (P, R) of the plurality of ducts.
b) a pair of opening / closing members (71A, 71B) that independently open and close,
A single motor (61) that shifts the driving timing of the pair of opening / closing members to each other and stops the pair of opening / closing members at four or more arbitrary positions, and the temperatures of the two cooled chambers (P, R) A pair of temperature detecting means (75, 50) for detecting the temperature, and the pair of opening / closing means for deciding a time for driving the motor based on the detected temperatures of the pair of temperature detecting means and the set temperatures of the two cooled chambers. A cooling storage, which is provided with a control device for controlling stop of members.