JPH0776663B2 - 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 the temperature in a room by controlling the discharge amount of cold air supplied from a discharge port.

(B) Conventional Technology In a conventional cold storage of this kind, the inside of the storage room is cooled by directly supplying cold air to the storage room or by supplying cold air to a cold air passage that indirectly cools the storage room. 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, for example, Japanese Utility Model Publication 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 the gas due to the temperature change in the chamber. Use expansion to compress and expand the bellows,
By this, the damper is driven and the cold air discharge port is opened / closed to control the amount of cold air supplied to the room to control the temperature of the storage room, but the phase change of the gas through the capillary tube is used. However, since the response to temperature change is slow, and the accuracy is low, it is difficult to change the temperature setting and the control temperature is not stable.

(D) Means for Solving Problems The cooling storage of the present invention provides a cooled space (F, P, R) formed by a heat insulating box and a door, and cold air cooled by a cooler. Multiple ducts (18, 20, 21) leading to the cooling space,
An opening / closing member (71) that opens and closes a cold air discharge port (20a) formed in a duct (20) that guides cool air to the cooled space (P) among the plurality of ducts, and an opening / closing member for opening / closing the opening / closing member (71). Motor (61) stopped at the position, setting means for setting the temperature of the cooled space (P), the opening degree of the opening / closing member is decreased if the setting temperature is high, and the opening degree of the opening / closing member is decreased if the setting temperature is low. The time for driving the motor (61) is determined based on the set temperature of the setting means so as to increase the stop position when the opening / closing member is opened, and the set temperature and the space to be cooled (P) are controlled. And a control device for controlling the timing of opening and closing the opening / closing member based on the temperature detected by the temperature detecting means.

(E) Operation As described above, according to the present invention, the control devices S1 and S2 determine the time for driving the motor 61 based on the set temperature of the cooled space (that is, the compartment P) set by the setting means. The opening / closing member (i.e., the baffle plate 71) acts to control the stop position (i.e., open position or opening) of the opening / closing member at a position determined based on the set temperature. By simply performing a simple operation of setting the set temperature of (P), the supply amount of the cool air introduced into the compartment (P) is appropriately adjusted to the set temperature (if the set temperature of the compartment is low, supply It can be used to increase or decrease the cooling rate of the compartment (P) while adjusting the amount of supply to increase or decrease. In particular, this cooling storage (particularly a damper device) is suitable for application to a refrigerator in which the set temperature of the compartment can be adjusted in a wide temperature range from a freezing temperature to a non-freezing temperature (for example, a refrigerating temperature). The timing of opening and closing the opening / closing member is controlled based on the set temperature of the compartment and the detected temperature.

(F) Example Refrigerator (1) as an example of a cooling storage in the drawings
Will be described. FIG. 6 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 +
And 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 heat insulating partition plate (9) is attached by being supported by a groove (3a) formed in the inner box (3) at a height, and the cold storage room (R) is vertically partitioned by this partition plate (9). It In the space above the partition plate (9), the lower surface of the partition wall (5), the upper surface of the partition plate (9), and the inner box (3)
A box-shaped case (11) that is open to the front is formed by forming a cool air passage (10) at a distance from both side surfaces and the rear surface. 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 partitioned chamber (P) as a cooled space in the case (11) that communicates with only the outside of the case, and the front end of the cold air passage (10). Is blocked.

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 that connects the rear part of the cooling chamber (14) with the refrigerating chamber (R), and cool air is discharged into the refrigerating chamber (R) from the cool air discharge port (21a). The cold air circulating in the freezing compartment (F) and the cold air passage (10) is cooled by directly cooling the freezing compartment (F), and the compartment (P) is cooled by indirect cooling from the case (11), and then the cooling compartment (F). 14) Return to the cooling chamber (14) through the cold air suction ports (22) (23) communicating with the front part. In the heat insulating material (4) on the side wall of the refrigerator (1), there is a return duct (24) that connects the refrigerating room (R) and the front part of the cooling room (14).
Is formed, and the cold air in the refrigerating chamber (R) passes through here and returns from the suction port (25) to the cooling chamber (14). (26) is a compressor included in the freeze-freezing cycle, and (27), (28) and (29) are doors that open and close the front openings of the chambers (F), (P) and (R), respectively. In the above-mentioned embodiment, the compartment P is cooled by the indirect cooling from the cold air passage 10, but the cooling is not limited to the indirect cooling. For example, the case 11 is removed and the partition wall 5, the partition The space surrounded by the plate 9, both side surfaces and the back surface of the inner box and the door 28 may be defined as a compartment P, and the compartment may be cooled by directly introducing the cool air into the compartment, which is a so-called direct cooling system by cold air circulation.

The amount of cold air discharged from the discharge port (21a) is controlled to be opened / closed by an electromagnetic damper (36) as an opening / closing member. The electromagnetic damper (36) is composed of a baffle plate, an electromagnetic coil (36A), a plunger (not shown), etc., which is attached to the arm tip and opens and closes the discharge port (21a).

FIG. 2 shows an electric circuit diagram for temperature control of the freezer compartment (F) and the refrigerator compartment (R). In FIG. 2, (40) is a negative characteristic thermistor for detecting the temperature in the freezer compartment (F), which is connected between the DC power supply (V _CC ) and the grounded resistor (41),
The terminal potential of the resistor (41) is input to the (-) input terminal of the comparator (42), and the set potential determined by the resistors (43) and (44) is input to the (+) input terminal of the comparator (42). Is entered. The comparator (42) has a hysteresis due to the positive feedback resistor (45), and its output is passed through the resistor (46) to the triac (47).
Connected to the gate of a triac (48) to trigger the gate of. A motor (26M) for driving the compressor and a blower (1
The parallel circuit of the motor (16M) of 6) is connected. The output of the comparator (42) becomes low potential (hereinafter referred to as "L") when the temperature of the freezer compartment (F) becomes -18 ° C or higher, for example, and triggers the triacs (48) and (47) to drive the motor ( 26M) (1
6M), the output becomes high potential (hereinafter referred to as "H") when the temperature becomes -22 ° C or lower, and the triac (48)
(47) becomes non-conducting and the motors (26M) and (16M) are stopped. The freezer compartment (F) is thereby cooled to an average of -20 ° C.

Reference numeral (50) is a negative characteristic thermistor for detecting the temperature of the refrigerating room (R). The terminal potential of the resistor (51) connected between grounds is similarly input to the (-) input terminal of the comparator (52) for comparison. Bowl (5
The set potential divided by the resistors (53) and (54) is input to the (+) input terminal of 2). The comparator (52) has a hysteresis due to the positive feedback resistor (55), and its output is a resistor (5
Connected to the gate of the triac (57) via 6). The triac (57) is connected in series with the coil (36A) of the electromagnetic dieper (36) and the AC power source. The output of the comparator (52) becomes "L" when the temperature of the refrigerating room (R) becomes, for example, + 5 ° C or more, and triggers the triac (57) to energize the coil (36A). Electromagnetic damper (36)
Energizes the coil (36A) to open the discharge port (21a). Further, in the comparator (52), the temperature inside the refrigerating chamber (R) is lowered to + 1 ° C., the output is set to “H”, the coil (36A) is de-energized, and the discharge port (21a) is closed. As a result, the refrigerating room (R) has an average temperature of + 3 ° C.

The amount of cold air discharged from the discharge port (20a) is measured by the dieper device (35).
The opening and closing is controlled by. 3 and 4 show a partially cutaway front view and a side sectional view of an embodiment of the dieper device (35). Reference numeral (60) is a case embedded in the heat insulating material (4) through an opening (3a) formed in the inner box (3) below the discharge port (20a). AC motor (61) protruding (61a), small-diameter bevel gear (62) attached to the tip of this drive shaft (61a), and 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. The rotating shaft (63) has a cam (6
6) is fixed. The cam (66) is a disc having a predetermined thickness, is eccentrically attached to the rotating shaft (63), and in the embodiment, the shaft (63) is located at a position of 1/3 of the diameter.

Reference numeral (67) is a partition wall that partitions the portion located in the cold air passage (10) at the front of the case (60) and the portion of the case (60) in which the cam (66) and the like behind it are housed. 67) prevents the freezing of cold air into the portion where the cam (66) etc. are stored to prevent icing. An arm having a lower end in front of the partition wall (67) rotatably fixed to the case (60) in the front-rear direction by a shaft (68) and protruding from the notch (69) of the case (60) into the cold air passageway (10). (70) is provided, and a baffle plate (7) as an opening / closing member for opening / closing the discharge port (20a) is provided at the upper end of the arm (70).
1) is attached. The lower part of the arm (70) is a spring (72)
Is connected to the partition wall (67) and is always urged in the direction of closing the discharge port (20a). Reference numeral (73) is a moving rod penetratingly installed in the partition wall (67) so as to be movable back and forth, and slidably contacts the cam (66) and the arm (70). Further, (74) is a switch that closes the contact (74A) when the baffle plate (71) closes the discharge port (20a). The switch (74) may detect the closing of the baffle plate (71) as an abutting relationship with the cam (66).

FIG. 1 shows a first embodiment of an electric circuit as a control device for controlling the temperature of the compartment P, and S1 determines the time for driving the motor 61 on the basis of the set temperature of the setting means, and the opening / closing member ( That is, a control device for controlling the stop position when the baffle plate 71) is opened, and for controlling the stop when the opening / closing member is opened and closed based on the set temperature and the temperature detected by the temperature detecting means, The details will be described below. (7
5) is a negative characteristic thermistor that substantially detects the temperature in the compartment (P) by the temperature in the compartment (P) or the temperature in the cold air passage (10), which is divided by the resistance (76). The terminal potential of the thermistor (75) is input to the (−) input terminal of the comparator (77). The set potential determined by the resistors (78) and (79) is input to the (+) input terminal of the comparator (77). A resistor (78) connected to the power supply (V _cc ) is connected in parallel with a switch (SW ₁ ) and a series circuit of a resistor (80) having a relatively large value, and the resistor (78) is connected in parallel with an analog circuit. A series circuit of a switch (81) and a resistor (82) having a relatively small value is connected. A positive feedback resistor (83) is connected to the comparator (77) to have a hysteresis, and its output is input to AND gates (84) and (85). Between the power supply (V _cc ) and ground, a series circuit of switch (SW ₂ ) and resistor (86) and switch (SW ₃ )
And a resistor (87) in series circuit are connected respectively, and resistor (8
The terminal potential of 6) is input to the AND gate (84) and the gate of the analog switch (81), and the terminal potential of the resistor (87) is input to the AND gate (85). When one of the switches (SW ₂ ) and (SW ₃ ) is closed, the other is opened, and when the switch (SW ₂ ) is further closed, the switch (SW ₁ ) is also opened. These switches (SW ₁ ) (SW ₂ ) (SW ₃ ) are doors (28)
It is arranged on the operation panel (89) provided on the front surface.

The output of the AND gate (84) is converted into a pulse by the differentiating circuit (I ₁ ) and input to the input terminal of the timer (T ₁ ). The timer (T ₁ ) sets the output terminal to “H” for a time (t ₁ ) from the time when the “H” pulse is input to the input terminal, and its output is input to the OR gate (90). AND gate (85)
The output is also input to the input terminal of the timer via a differentiating circuit (I ₂₎ in the same manner (T _2), a timer (T ₂₎ since the beginning of "H" pulse to the input terminal (t ₂₎ Time Output terminal "H"
And its output is input to the OR gate (90). The output of the OR gate (90) is input to the set terminal of the flip-flop (91) via the differentiating circuit (I ₃ ), and further the inverter (9)
It is input to the reset terminal of the flip-flop (91) via 2) and the differentiation circuit (I ₄ ). The output of the OR gate (90) is further input to the reset terminal of the timer (T ₁ ) (T ₂ ) via the inverter (93) and the differentiating circuit (I ₃ ) and each timer (T ₁ ) (T ₂ ) is reset. The "H" pulse is input to the terminal and reset. The output of the comparator (77) is further input to the set terminal of the flip-flop (91) via the inverter (94) and the differentiating circuit (I ₆ ), and the reset terminal is further connected to the contact (74) of the switch (74). 74A) and the terminal voltage of the resistor (95) connected in series with the power supply (V _CC ) are input via the differentiation circuit (I ₇ ). The inverting output terminal of the flip-flop (91) is connected to the gate of the triac (97) connected in series with the motor (61) and the AC power supply (AC).

The compartment (P) temperature control operation with the above configuration will be described with reference to FIG. First, when the compartment (P) is used as a freezing room, the switch (SW ₂ ) is closed. At this time, the switch (SW ₁ ) (SW ₃ ) is open. As a result, the analog switch (81) is turned on and the resistor (78) is connected in parallel to the resistor (82) having a smaller value, so that the comparator (77) (+) is connected.
The input potential rises relatively large, and at this time, the output of the comparator (77) becomes “H” when the temperature of the compartment (P) is −18 ° C., −
It becomes "L" at 22 ℃. When the compartment (P) is sufficiently cooled, the cam (66) is located at (66a) shown by the alternate long and short dash line in Fig. 4 and contacts the moving rod (73) at the shortest distance from the rotating shaft (63). The baffle plate (71) is at the position (71a) and closes the discharge port (20a). From this state, when the temperature of the compartment (P) rises and reaches −180 ° C. at the zero time in FIG. 5, the output of the comparator (77) becomes “H” and the terminal potential of the resistor (86) also becomes “H”. since a H "output becomes" H "of the aND gate (84), a timer (T _1)" H "pulse is input, the output of the timer (T ₁₎ becomes" H ". As a result, the output of the OR gate (90) becomes "H", the "H" pulse is input to the set terminal of the flip-flop (91), and it is set, and the inverting output terminal becomes "L", and the triac (97) conducts. Then, the motor (61) rotates. This causes the cam (66) to rotate counterclockwise in FIG. 4, and 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, Since the output of the OR gate (90) becomes "L" and the output of the inverter (92) becomes "H", the "H" pulse is input to the reset terminal of the flip-flop (91) to be reset and the inverted output terminal becomes It becomes “H”, the triac (97) becomes non-conductive, and the motor (61) stops. At this time, the rotation angle of the cam (66) is 180 °, and at this time, the cam (66) is in contact with the moving rod (73) at the position of the longest distance from the rotation shaft (63). As a result, the moving rod (73) is pushed out to the frontmost, and the baffle plate (71) is discharged from the discharge port (20).
From a), the farthest position is set to the fully open position, and then stopped at the position shown by the solid line in FIG. In this state, a large amount of cold air is introduced into the cold air passage (10) and the compartment (P) is rapidly cooled.
After that, when the temperature of the compartment (P) decreases to −22 ° C., the output of the comparator (77) is inverted to “L”, so that the output of the inverter (94) becomes “H” and the flip-flop (91).
"H" pulse is input to the set terminal of
The inverting output terminal becomes "L", the triac (97) becomes conductive, and the motor (61) is operated. This causes the cam (66) to rotate further counterclockwise, which causes the baffle plate (71) to close, and when the discharge port (20a) is completely closed, the contact (74A) closes and voltage is applied to the resistor (95). Occurs,
The motor (61) is stopped because the flip-flop (91) is reset. Repeat this for the cold aisle (1
A large amount of cold air was introduced into 0), and inside the compartment (P) was -18
Frozen foods can be stored because the temperature is extremely low, such as -20 ℃ on average between ℃ and -22 ℃.

Next, when the compartment (P) is used as an ice greenhouse, the switch (SW ₃ ) is closed and the switch (SW ₁ ) is further closed. At this time, the switch (SW ₂ ) opens. At this time, the resistor (78) is connected in parallel with the resistor (80), and the (+) input potential of the comparator (77) slightly rises. As a result, the comparator (77) sets the output to “H” when the temperature of the compartment (P) is, for example, 0 ° C., and is −3 ° C.
The output becomes "L". When the compartment (P) is sufficiently cooled and the baffle plate (71) is at the position (71a) and the discharge port (20a) is closed, the temperature rises and reaches 0 ° C at time zero in FIG. The output of the container (77) becomes "H".
Output becomes "H" in turn from this time a high potential terminal of the resistor (87) has occurred AND gate (85), a timer (T ₂₎ to the "H" pulse is input outputs the "H Became
The output of the OR gate (90) becomes "H", the flip-flop (91) is set, and the motor (61) starts to move as described above. As a result, the cam (66) rotates counterclockwise in FIG. 4, and the output of the timer (T ₂ ) becomes “L” at time (t ₂ ) when (t ₂ ) time has elapsed since the start of rotation. Then, the output of the OR gate (90) becomes "L" and the output of the inverter (92) becomes "H".
1) is reset and the motor (61) stops as before. At this time, the rotation angle of the cam (66) is 270 °, and at this time, as shown in FIG. 5, the longest distance from the rotation shaft (63) of the cam (66) is located directly below, and the one-dot chain line in FIG. Is located at (66b), and is in contact with the moving rod (73) at a position approximately midway between the longest axis and the shortest axis of the rotating shaft (63). As a result, the baffle plate (71) is stopped in the intermediate state shown by (71b) in FIG. 4, which is approximately intermediate between the fully opened position and the closed position.
In this state, cold air is introduced into the cold air passage (10) to cool the compartment (P), and when the temperature drops to -3 ° C, the output of the comparator (77) is inverted to "L". (9
The output of 4) becomes "H", the flip-flop (91) is set, and the motor (61) rotates. This causes the cam (66) to rotate further counterclockwise and the baffle plate (7
1) Stops as before with the discharge port (20a) closed.

Hereinafter, this is repeated, and the average of −2 ° C. is set between 0 ° C. and −3 ° C. in the compartment (P). Here, 0 ° C. to −3 ° C. is the ice temperature storage temperature zone. Ice temperature storage temperature refers to the temperature of the freezing point of food, which is based on the property that the freezing point of food is lower than the freezing point, but 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. Although the range of this ice temperature storage temperature zone is relatively narrow, the baffle plate (71b) is stopped at the middle open position as described above, and the inflow of cold air from the discharge port (20a) is restricted, so the damper device ( 35)
Is suppressed, the amount of cold air flowing in during the movement of the baffle plate (71) is reduced, and the temperature is controlled well within the temperature range. Also, at this time, the baffle plate (71)
As shown in FIG. 5, the opening operation of is performed from closed to middle opening, then once fully opened and then closed again to become middle opened.
Since a relatively large amount of cold air is introduced at the start of cooling, it contributes to the improvement of the cooling speed, and since it rotates by 90 ° as it is from the mid-open position and closes, it is overheated by cold air flowing during the movement of the baffle plate (71). Cooling is also extremely low.

Next, when the compartment (P) is used as a refrigerating room, the switch (SW ₁ ) is opened while the switch (SW ₃ ) is closed.
(At this time, switch (SW ₂ ) opens.) At this time, the comparator (7
The set potential connected to the (+) input terminal of 7) is the resistance (7
Since it is a relatively low value divided by 8) and (79), the comparator (77) sets the output to "H" when the temperature of the compartment (P) is, for example, + 5 ° C, and sets the output to "H" at + 1 ° C. L ”. The damper device (35) is driven by the motor (61) in the same manner as in the case of being used as the above-mentioned ice greenhouse, and the baffle plate (71) is controlled to be closed and opened to an average of + 3 ° C. The function and effect are substantially the same as described above.

As described above, since the compartment (P) can be selectively used as a freezing room, an ice greenhouse, or a refrigerating room, it can effectively respond to changes in the composition ratio of frozen foods, ice-temperature stored foods, or refrigerated foods among the foods to be stored. , The dead space of the refrigerator volume is reduced and the effective use of the room is achieved. In this case, the amount of cold air introduced when the damper device (35) is opened can be changed by the operating time of the motor (61). For example, the opening area of the discharge port (20a) should be taken into consideration in consideration of temperature controllability when used as a freezer. Even if the value is increased, the control performance in each temperature zone is not impaired because the baffle plate (71) is opened to limit the introduction amount when controlling in other temperature zones. Further, since the damper device (35) is driven by the motor (61) having the speed reduction mechanism (65), the response to the temperature change is good, and stable temperature control is possible, and the baffle plate (71) is also provided. Since it does not collide with the periphery of the discharge port (20a) when it is closed, it produces less noise than an electromagnetic damper.

FIGS. 7 to 9 are the second related to the control of the damper device 35.
FIG. In these drawings, the same reference numerals as those in FIGS. 1 to 6 represent the same elements. FIG. 7 shows a second embodiment of an electric circuit as a control device for controlling the temperature of the compartment P,
S2 is a control device for controlling the motor based on the set temperature of the setting means, the details of which will be described below. in this case,
The switch (SW ₄ ) is connected to the power supply (V _CC ) in series with the resistor (100), and the terminal potential of this resistor (100) is the resistor (8 _CC ).
0) connected in series with the power supply (V _CC ) to the gate of the analog switch (101) and connected to the AND gate (10
Entered in 2). Also, the switch (SW ₅ ) is a resistor (103).
Is connected in series to a power source (V _CC ) and the terminal potential of this resistor (103) is input to the AND gate (104). Switch (SW
₂ ) (SW ₄ ) and (SW ₅ ) are closed when one of them is closed and the other 2
One shall open. The output of the comparator (77) is input to the other AND gates (102) and (104) of the AND gate (84), and A
The output of the ND gate (102) is input to the timer (T ₃ ) via the differentiation circuit (I ₈ ), and the output of the AND gate (104) is input to the timer (T ₄ ) via the differentiation circuit (I ₉ ). The output of the timer (T ₃ ) (T ₄ ) is input to the OR gate (90).
The output of the differentiating circuit (I ₅ ) is input to the reset terminals of the timers (T ₃ ) and (T ₄ ) and reset by the “H” pulse. Timer (T ₃₎ is the "H" pulse is input from that point the output (t ₃₎ time is set to "H", and the timer (T ₄₎ is "H" the output (t ₄₎ Time I shall.

Next, the operation will be described with reference to FIG. 8 and FIG. 9, but the description of the part overlapping with the above description will be omitted except when the compartment (P) is used as a freezing room. In this case, when using the compartment (P) as an ice greenhouse, close the switch (SW ₄ ). As a result, the analog switch (101) is turned on, the resistor (78) is connected in parallel with the resistor (80), and the comparator (7) is connected.
7) is the setting for the ice greenhouse mentioned above. In addition, AND gate (10
When the temperature of the compartment (P) rises to 0 ° C, the output of the comparator (77) becomes "H" and the output of the AND gate (102) becomes "H". ", The output of the timer (T ₃ ) becomes" H ". As a result, the motor (61) rotates (t ₃ ) and stops when the output of the timer (T ₃ ) becomes “L”. At this time, the rotation angle of the cam (66) is 240 °, which is the position (66c) shown in FIG. 8. The baffle plate 71 once reaches the fully open position and is fully opened, and then moves in the closing direction. It is stopped at the position 71c shown by the alternate long and short dash line in FIG. 8, that is, at the position where the opening is 2/3 of the full opening (this position is called the 2/3 opening). The subsequent closing operation is the same as described above.

When the compartment (P) is used as a refrigerating compartment, the AND gates (81) and (101) with the switch (SW ₅ ) closed are non-conductive, and the comparator (77) is set to the refrigerating compartment as described above. At the same time, the AND gate (104) is in a state of generating an output. When the temperature of the compartment (P) rises to + 5 ° C, the comparator (77) becomes "H", the output of the AND gate (104) becomes "H", and the output of the timer (T ₄ ) becomes "H". And the motor (61) rotates. After (t ₄ ) hours, the output of the timer (T ₄ ) becomes “L” and the motor (61) stops. The rotation angle of the cam (66) at this time is 300 °,
The position is shown by (66d) in FIG. Further, the baffle plate 71 once reaches the fully open position and becomes fully open, and then moves in the closing direction to go through the position of 2/3 opening indicated by the alternate long and short dash line 71c in FIG. 8 to the position indicated by the alternate long and short dash line 71d. That is, it stops at a position where the opening is 1/3 of the full opening (this position is called 1/3 opening). The subsequent closing operation is the same as described above.

According to the above configuration, in addition to the effects of the above-described embodiment, it is possible to set a proper amount of cool air discharge for each temperature zone, reduce the difference in the operating frequency of the damper device (35), and reduce the temperature. It becomes possible to obtain substantially constant control performance with a single damper for the band, and thereby more stable temperature control can be realized.

(G) Effect of the Invention As described above, according to the present invention, the controller opens the opening degree of the opening / closing member based on the set temperature of the cooled space (that is, the compartment) set by the setting means if the set temperature is high. If the temperature is small and the set temperature is low, the motor drive time is decided to increase the opening / closing member opening, and the stop position (ie open position or opening) when the opening / closing member (ie baffle plate) is opened is set. Since the operation is controlled to a position that is determined based on the temperature, the refrigerator user can simply set the set temperature of the compartment by the setting means and the supply amount of the cool air introduced into the compartment can be set to the set temperature appropriately. The cooling rate of the compartment, which is adjusted to an appropriate amount (if the set temperature of the compartment is low, the supply amount is large, and if the set temperature is high, the supply amount is small), and the supplied cool air amount changes based on the set temperature. Is the simple operation above It is possible to speed up or slow down with this, and this cooling storage (particularly damper device) can be used for refrigerators in which the set temperature of the compartment can be adjusted in a wide temperature range from freezing temperature to non-freezing temperature (eg refrigeration temperature). Will be able to apply. Further, the timing of opening and closing the opening / closing member is controlled based on the set temperature and the detected temperature of the cooled space, and the timing of stopping the opening / closing member is determined by the set temperature of the cooled space as described above.

[Brief description of drawings]

Each drawing shows an embodiment of the present invention, FIG. 1 is an electric circuit diagram for temperature control of a compartment, FIG. 2 is an electric circuit diagram for temperature control of a freezer compartment and a refrigerating compartment, and FIG. 3 is one of a damper device. Partial cutaway front view, FIG. 4 is a sectional view of the same side, FIG. 5 is a diagram for explaining the operation of the damper device, and FIG. 6 is a sectional side view of the refrigerator.
The drawing shows another embodiment corresponding to FIG. 1, and FIG.
Another embodiment corresponding to the figure is shown, and FIG. 9 shows another embodiment corresponding to FIG. (20a) …… Discharge port, (35) …… Damper device, (61)
...... Motor, (65) ...... Reduction mechanism, (75) …… Thermistor, (T ₁ ) (T ₂ ) (T ₃ ) (T ₄ ) …… Timer, (P)
…… Compartments, (SW ₁ ) (SW ₂ ) (SW ₃ ) (SW ₄ ) (SW ₅ )…
…switch.

Claims (1)

[Claims] 1. A cooled space formed by a heat insulating box and a door (F,
P, R), a plurality of ducts (18, 20, 21) for guiding the cool air cooled by the cooler to each of these cooled spaces, and the cool air for the cooled space (P) of these plural ducts. An opening / closing member (71) that opens and closes the cool air discharge port (20a) formed in the drilling duct (20), a motor (61) that opens and closes the opening and closing member and stops at an arbitrary position, and the cooled space (P). ) Setting means for setting the temperature, and if the set temperature is high, the opening degree of the opening / closing member is reduced, and if the setting temperature is low, the opening degree of the opening / closing member is increased. The stop time when the opening / closing member is opened is controlled by deciding the driving time, and the opening / closing member is closed when the opening / closing member is opened based on the set temperature and the temperature detected by the temperature detecting means of the cooled space (P). Equipped with a control device that controls the timing of time Cooling storage, characterized in that the.