JP2006017371A - Freezer/refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems in a freezer/refrigerator wherein the cold air cooled by a single cooling unit is circulated in a freezing chamber and a refrigerating chamber by a blower that the temperature rise is increased not only in the refrigerating chamber but also in the freezing chamber, and frozen foods can not be properly stored in a case when a large amount of food not sufficiently cooled is stored in the refrigerating chamber, in a case when the food of high temperature is stored in the refrigerating chamber, or a front door of the refrigerating chamber is kept opened for a long time. <P>SOLUTION: In this freezer/refrigerator wherein the cold air cooled by the single cooling unit is circulated in the refrigerating chamber and the freezing chamber by the blower, and a temperature of the refrigerating chamber is controlled by a damper device for opening and closing a cold air passage to the refrigerating chamber, the damper device is kept in an opening and closing operation state by time-shared control to promote the cooling of the freezing chamber in a refrigerating chamber cooling mode. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a refrigerator-freezer that controls the temperature of a refrigerator compartment by opening and closing a cold air supply passage according to the temperature of the refrigerator compartment.

There is a refrigerator-freezer that controls the temperature of the refrigerator compartment by opening and closing the cold air supply passage according to the temperature of the refrigerator compartment. This is because the freezing room and the refrigerating room are partitioned by a partition wall so that the refrigerating room is located at the upper part, and the cold air cooled by a single cooler installed at the rear of the freezing room is blown by the blower. It is configured to circulate to the chamber, and in the partition wall, molded heat insulating materials such as separate polystyrene foams are stored in the front portion and the rear portion, respectively, and a discharge passage for guiding cold air to the refrigerating chamber is formed in the rear formed heat insulating material In addition, a damper device is accommodated in the discharge passage (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-160322 (pages 2 to 3, FIGS. 1 to 4)

In this way, in the structure in which the cool air cooled by a single cooler is circulated to the freezer compartment and the refrigerator compartment with a blower, the entire amount of cool air flows to the freezer compartment when the damper device is closed. However, when the damper device is opened, the cold air that circulates in the refrigerator compartment and the cold air that circulates in the freezer compartment merge and flow into the freezer compartment and the refrigerator compartment. descend.

Also, when storing a large amount of food that has not been sufficiently cooled in the refrigeration room, storing high temperature food in the refrigeration room, or when the front door of the refrigeration room is opened for a long time, etc.
Not only is the temperature rise in the refrigerator compartment, but also the temperature rise in the freezer compartment increases, which is not preferable.

Moreover, in recent refrigerator-freezers, the control which performs economical driving | operation based on the ambient temperature of a refrigerator-freezer, an operation rate, and other factors is taken. For example, when the ambient temperature of the refrigerator / freezer is relatively low, the temperature rise of the storage room in the refrigerator / freezer is small due to the ambient temperature, so save operation with a low speed rotation of the electric compressor constituting the refrigeration cycle Driving in mode. In such an operation mode, if a large amount of food is stored in the refrigerator compartment as described above, the temperature rise in the refrigerator compartment will increase further, and the temperature rise in the freezer compartment will further increase. A situation unsuitable for storage of frozen foods will occur.

In view of the above points, the present invention improves cooling of a freezer compartment in a refrigerator compartment cooling mode in which cold air cooled by a cooler is supplied to the refrigerator compartment. It is also suitable for storing frozen foods by minimizing the temperature increase in the freezer compartment even when the temperature of the refrigerator compartment rises above a predetermined value when a large amount of food is stored in the refrigerator compartment. A refrigerator-freezer is provided.

1st invention is equipped with the single cooler in which the refrigerant | coolant compressed with the compressor evaporates, The cold air cooled with this cooler is provided with the cold air | gas channel | path through which it circulates to a refrigerator compartment and a freezer compartment by a fan, The temperature of the room is controlled by the opening and closing operation of the damper device that opens and closes the cold air passage. In the refrigerating room cooling mode in which the cold air cooled by the cooler is supplied to the refrigerating room, the operation state of the damper device is time-division controlled. It is characterized by being in the open / close operation state by.

2nd invention is equipped with the single cooler which the refrigerant | coolant compressed with the compressor evaporates, The cold air cooled by this cooler is provided with the cold air | gas channel | path through which it circulates to a refrigerator compartment and a freezer compartment by a fan, In the refrigerator-freezer in which the temperature of the chamber is controlled by the opening / closing operation of the damper device that opens and closes the cold air passage, the damper device is in the normal cooling operation mode, and when the temperature of the refrigerator room rises to the set upper limit temperature, When the cold air passage is opened and the temperature of the refrigerator compartment decreases to the set lower limit temperature, the cold air passage is opened and closed. In an abnormal temperature state where the temperature of the refrigerator compartment rises, the operation state of the damper device is opened and closed by time division control. It is characterized by being in an operating state.

The first aspect of the invention relates to a cooling room cooling mode in which cold air is supplied to the refrigerating room, as compared with a case where the damper device remains in an open state because the operation state of the damper device becomes an opening / closing operation state by time division control. Thus, since the amount of cold air circulated to the freezer compartment can be increased in the normal refrigerator compartment cooling mode, the cooling of the freezer compartment is improved while maintaining the cooling of the refrigerator compartment. Even in an abnormal temperature state in which the refrigerated room temperature has increased, the amount of cold air circulating to the freezer room can be increased, so that the cooling failure of the freezer room due to the increased refrigerated room temperature can be improved. For this reason, the structure of the cool air supply passage is also facilitated.

In the second invention, the cold air cooled by the single cooler is circulated to the refrigerator compartment and the freezer compartment by the electric blower, and the temperature of the refrigerator compartment is controlled by a damper device that opens and closes the cold air passage supplied to the refrigerator compartment. In the normal refrigerator compartment cooling mode, the damper device remains open until the temperature of the refrigerator compartment falls to the set lower limit temperature, and a sufficient amount of cold air is circulated into the refrigerator compartment. The chamber can be controlled to a predetermined temperature. And in the abnormal temperature state where the temperature of the refrigerator compartment rose, since the amount of cold air circulating to the freezer compartment can be increased, the cooling failure of the freezer compartment caused by the rise of the refrigerator compartment temperature can be improved.

The refrigerator-freezer of the present invention includes a single cooler in which the refrigerant compressed by the compressor evaporates, and includes a cool air passage through which the cool air cooled by the cooler is circulated by the blower to the refrigerator compartment and the freezer compartment, The temperature of the refrigerator compartment is controlled by the opening and closing operation of the damper device that opens and closes the cold air passage. In the normal refrigerator compartment cooling mode and / or the abnormal temperature state in which the refrigerator room temperature rises, the operation state of the damper device is time-division controlled. In the following, an embodiment of the present invention will be described.

Next, an embodiment of the present invention will be described. 1 is a longitudinal side view of the refrigerator of the present invention, FIG.
FIG. 3 is a perspective view of the damper device of the present invention, FIG. 4 is a longitudinal side view of a portion where the damper device of the present invention is attached to the refrigerator, and FIG. 5 relates to the present invention. FIG. 6 is an explanatory diagram showing the operation of the damper device and the electric compressor and the temperature change in the refrigerator compartment and the freezer compartment in the basic control operation of the present invention, and FIG. 7 is a time division control operation according to the present invention. It is explanatory drawing which shows the operation | movement of the damper apparatus and electric compressor in and the temperature change of a refrigerator compartment and a freezer compartment. Specific examples will be described below.

The refrigerator 1 according to the first embodiment has a configuration in which the inside of the main body 2 having a full opening is partitioned to form a plurality of storage chambers, and the front surfaces of these storage chambers can be opened and closed by doors. The refrigerator main body 2 has a heat insulating structure in which a foam heat insulating material 2C is filled between an outer box (outer wall plate) 2A and an inner box (inner wall plate) 2B. In the refrigerator main body 2, a refrigerator compartment 3, a freezer compartment 5, and a vegetable compartment 4 are partitioned and provided from above.

The front opening of the refrigerator compartment 3 is opened and closed by a revolving refrigerator door 10 that is rotated laterally by a hinge device on one side of the refrigerator body 2. The front opening of the vegetable compartment 4 is a vegetable container 1 supported so that it can be pulled out in the front-rear direction by means of a support device 18 with left and right rails and rollers provided in the vegetable compartment 4.
5 is closed by a pull-out door 11 that is drawn forward together. The freezer compartment 5 is closed by a door 12, but, like the vegetable compartment 4, a container 16 that is supported so as to be able to be pulled out in the front-rear direction with respect to the left and right rails provided in the freezer compartment is drawn forward together with the door 12. The structure is a pull-out type.

20 is an electric compressor that compresses refrigerant in the refrigeration cycle, and 21 is a condenser for refrigerant in the refrigeration cycle. Reference numeral 22 denotes an evaporating dish for evaporating defrosted water from an evaporator (cooler) 24, which will be described later, by the heat of the condenser 21. The evaporating dish 22 is placed on the condenser 21 and can be pulled out from the lower front portion of the refrigerator body 2. is there. The compressor 20, the condenser 21, and the evaporating dish 22 are installed in a machine room 23 provided in the lower part of the refrigerator body 2. Reference numeral 24 denotes a refrigerant evaporator (cooler) installed in a cooler chamber 26 formed on the back surface of the freezer compartment 5. An electric blower 25 circulates the cold air cooled by the evaporator (cooler) 24 to the freezer compartment 5, the refrigerator compartment 3, and the vegetable compartment 4. Reference numeral 27 denotes a glass tube heater for defrosting the evaporator (cooler) 24. The defrosted water in the evaporator (cooler) 24 is guided to the evaporating dish 22 through the drain pipe and is evaporated there.

The refrigerating chamber 3 positioned at the upper part and the freezing chamber 5 positioned at the lower part thereof are partitioned by a heat insulating partition wall 28, and the heat insulating partition wall 28 is composed of an injection molded synthetic resin upper plate 29 and an injection molded synthetic resin. A heat insulating structure in which a heat insulating material 31 such as styrofoam previously formed into a predetermined shape is sandwiched between the lower plate 30 and the lower plate 30 is formed. Such a heat insulating partition wall 28 is
It is the structure which is inserted and inserted into the front-back direction groove | channel 2D formed in the inner box (inner wall board) 2B in the left-right both sides of the refrigerator main body 2 from the front opening part of the refrigerator main body 2. FIG. With the heat insulating partition wall 28 attached, a partition front plate 28A is attached across the left and right sides of the outer box (outer wall plate) 2A so as to cover the front surface of the heat insulating partition wall 28 and the front surface of the groove 2D.

On the back side of the refrigerator compartment 3, a cold air supply passage 35 is formed in the vertical direction. 32 is the refrigerator compartment 3
This is a combination of a synthetic resin back plate 33 and a heat insulating material 34 such as polystyrene foam attached to the back side thereof. The back wall 32 of the refrigerator compartment 3 is installed in parallel with the back wall of the refrigerator main body 2 so that the left and right sides of the heat insulating material 34 are in contact with the inner box (inner wall plate) 2B of the back wall of the refrigerator main body 2. The cold air duct portion 34 </ b> A that extends in the vertical direction and is recessed in the heat insulating material 34 forms a cold air supply passage 35.

In the rear part of the heat insulating partition wall 28, a cold air supply passage 36 penetrating the heat insulating partition wall 28 is formed. The cold air supply passage 36 is a passage for supplying cold air to the refrigerating chamber 3, and its lower portion is connected to the blower 25. It is an introduction part of the supplied cool air, and the upper part is arranged to communicate with the cool air supply passage 35. A damper device 50 is attached to the cold air supply passage 36, and the damper device 50 opens and closes the cold air supply passage 36 by the microcomputer-type control circuit unit 80 based on the temperature sensing of the sensor 50 </ b> A that senses the temperature of the refrigerator compartment 3. Behave. The refrigerator compartment 3 is controlled to a predetermined temperature by the opening / closing operation of the damper device 50.

The cold air cooled by the evaporator (cooler) 24 is circulated by an air blower 25 as shown by an arrow. That is, the cold air sent from the blower 25 is supplied to the freezer compartment 5 from the cold air outlet 37 on the upper back wall of the freezer compartment 5 and returns to the cooler compartment 26 from the cold air inlet 38 on the lower back wall of the freezer compartment 5. Then, it is circulated again by the evaporator (cooler) 24. Further, the cold air sent out from the blower 25 is supplied to the cold air supply passage 35 through the cold air supply passage 36, distributed to the cold air passages 35 </ b> A formed on the left and right sides of the cold air supply passage 35, and the back wall 32 of the refrigerator compartment 3. Is supplied to the refrigerator compartment 3 from the cold air outlet 39 formed in the above.

The cold air supplied to the refrigerating room 3 is sucked from a cold air suction port 40 formed at one lower part of the back wall 32 of the refrigerating room 3 and flows downward through a cold air passage 41 formed at the rear of the freezing room 5. Chamber 4
It blows out to the vegetable compartment 4 from the cold air outlet 42 opened in the rear part. The cold air blown into the vegetable compartment 4 indirectly cools the vegetables and the like in the vegetable container 15 with most of the cold air and directly cools them with a part of the cold air that enters, and is placed at the top of the vegetable compartment 4 or at the rear of the vegetable compartment 4. Opened cold air inlet 43
Then, the refrigerant is returned to the cooler chamber 26 and circulated again by the evaporator (cooler) 24.

The damper device 50 includes an electric mechanism 51, an operation plate 52 that is rotated by the electric mechanism 51, and a damper case 53 that has an opening 54 that is opened and closed by the operation plate 52. This operating plate is also called a damper. The electric mechanism 51 has a configuration in which a DC motor 55 and a plurality of reduction gear mechanisms that reduce the rotation of the rotation shaft of the electric motor 55 and transmit it to the output shaft are housed in a motor case 59. Since the inner diameter of the cylindrical motor case 59 is substantially the same as the outer diameter of the DC motor 55, the DC motor 55 is inserted into the motor case 59 in a fitted state. A reduction gear mechanism is attached, and the output shaft of the reduction gear mechanism passes through the end plate of the motor case 59 and the damper case 53, and the motor case 59
Forms protruding outward. The front end portion of the output shaft has a flat shape, and a flat fitting shaft hole formed at one end portion of the operation plate 52 fits into the flat shape portion of the output shaft. As a result, the operating plate 52 is decelerated and rotated in the forward and reverse directions by the forward and reverse rotations of the DC motor 55.

A synthetic resin terminal member 67 for supplying power to the DC motor 55 is attached to the motor case 59. By the control of the control circuit unit 80 provided in the refrigerator main body 2 to the power supply terminal 68 of the terminal member 67, rectangular pulse power is supplied to rotate the operation plate 52 in the forward direction and the reverse direction. The electric mechanism 51 is formed on a part of the motor case 59.
The mounting flanges 69 at the locations are attached to the side plate 53B of the damper case 53 by mounting portions 70 made of a combination of screws and nuts.

A stepped portion 74 extending upward is formed in the middle portion of the cold air supply passage 36 in the heat insulating material 31 of the heat insulating partition wall 28. The upper plate 29 of the heat insulating partition wall 28 integrally forms a wall 75 rising upward so as to surround the upper end portion of the cold air supply passage 36. The damper device 50 includes a step 7
The damper case 53 is fitted into the cold air supply passage 36 in a state in which the elastic sealing material 76 disposed on the upper surface of 4 is compressed, and the attachment portion 53C of the side plate 53B of the damper case 53 is fixed to the rising wall 75 by fixing means such as screws. The

The damper case 53 includes a passage wall 53A that constitutes a part of the cold air supply passage 36 in the heat insulating partition wall 28. The passage wall 53A is formed with a quadrilateral flange 71 projecting inwardly, and the opening 54 is formed. It is surrounded by the flange 71 and formed. On the upper surface of the flange 71, a quadrilateral elastic member 72 attached to the quadrilateral flange 71 is attached by bonding.

Further, an elastic member 73 having a size that contacts the entire upper surface of the quadrilateral elastic member 72 and closes the opening 54 is attached to the lower surface of the operation plate 52 by adhesion. As will be described later, the elastic members 72 and 73 are arranged so as to be pressed against each other when the operating plate 52 is closed so as to reliably close the opening 54.

In the damper device 50, electric power is supplied to the DC motor 55 by the control circuit unit 80 based on the temperature sensing of the temperature sensing sensor 50 </ b> A that senses the temperature of the refrigerator compartment 3, the electric mechanism 50 is activated, and the opening 54 is activated. The plate 52 opens and closes. That is, the operating plate 52 is closed in a state where the temperature of the refrigerating chamber 3 sensed by the temperature detection sensor 50A is lowered to the set lower limit temperature R1 of the refrigerating chamber 3 determined in the control circuit unit 80, and the temperature exceeds the set upper limit temperature R2. Then, the operation plate 52 is controlled to be in an open state.

Specifically, when the electric compressor 20 and the electric blower 25 are operated and the operation plate 52 opens the opening 54, cold air is circulated to the refrigerator compartment 3. When the temperature of the refrigerator compartment 3 is cooled to a predetermined set lower limit temperature R1 by this cold air circulation, a pulse signal in the forward rotation direction is supplied to the DC motor 55 by the control circuit unit 80, and the DC motor 55 is supplied. Rotates in the forward direction so that the operating plate 52 closes the opening 54. Due to this forward rotation, the operating plate 53 is moved to the opening 54.
Are closed, the elastic members 72 and 73 are pressed against each other, and the cool air passage is closed around the entire opening 54. In this way, the operating plate 52 closes the opening 54, so that the electric motor 55
Therefore, the load current of the DC motor 55 increases rapidly.
The change or magnitude of the load current is detected by the control circuit unit 80, and the DC motor 5
Stop 5 rotation.

When the operation plate 53 closes the opening 54, the temperature of the refrigerator compartment 3 gradually increases. When the temperature rises to a predetermined set upper limit temperature R2, a pulse signal in the reverse rotation direction is supplied to the DC motor 55 by the control circuit unit 80, the DC motor 55 rotates in the reverse direction, and the operating plate 52 opens. It rotates in the direction of opening 54. When the operation plate 53 opens the opening 54 to a predetermined position by the reverse rotation, the operation plate 52 collides with the stopper portion of the damper case 53 and stops. Due to this stop, the load of the DC motor 55 increases rapidly, and the load current of the DC motor 55 increases rapidly. The change or magnitude of the load current is detected by the control circuit unit 80, and the rotation of the flow type electric motor 55 is stopped.

As described above, the DC motor 55 is operated by the step plate operation by the pulse signal.
In order to open and close 2, it is also called a stepping motor. Further, the rotation stop control of the DC motor 55 may be a method in which the position of the operating plate 52 is detected and controlled by an optical switch or a mechanical switch. Further, a switch that detects a position where the operation plate 52 is closed or an open position may be provided, and the opening and closing of the operation plate 52 may be controlled by the number of pulse signals supplied from the detection position to the DC motor 55.

First, the basic control operation of the refrigerator 1 will be described. In a state in which the refrigerator-freezer 1 is normally used, the set upper limit temperature F is substantially detected by sensing the temperature of the freezer compartment 5 or the cooler 24.
2 and the set lower limit temperature F1, the compressor 20 and the blower 25 are turned on and off. That is, the compressor 20 and the blower 25 are turned on and off by the operation of the control circuit unit 80 based on the temperature sensing of the temperature sensing sensor 5A of the freezer 5 or the cooler 24. For this reason, when the freezer compartment 5 or the cooler 24 is once cooled to the set lower limit temperature F1 determined in the control circuit unit 80, the temperature detection sensor 5A detects the temperature and compresses it by the operation of the control circuit unit 80. The machine 20 and the blower 25 are in an OFF (stopped) state. In this state, the temperatures of the freezer compartment 5 and the cooler 24 are gradually increased, and when the temperature detection sensor 5A detects the temperature and reaches the set upper limit temperature F2 set in the control circuit unit 80, the control circuit unit 80 By the operation, the compressor 20 and the blower 25 are turned on (operated), and the cooling operation state in which the cooler 24 is cooled is entered.

By this cooling operation, when the temperature of the freezer compartment 5 decreases with the temperature decrease of the cooler 24 and is cooled to the set lower limit temperature F1, the compressor 20 and the blower 2 are operated by the operation of the control circuit unit 80.
5 is turned off (stopped). Thus, the compressor 20 and the blower 2 are operated by the operation of the control circuit unit 80 based on the temperature sensing of the temperature sensing sensor 5A that is a temperature control sensor for the freezer compartment 5.
5 is controlled, and the temperature of the freezer compartment 5 is controlled within a predetermined temperature range.

On the other hand, the refrigerating room 3 has a set lower limit temperature R of the refrigerating room 3 set in the control circuit unit 80 as described above.
In the state once cooled to 1, the cooler passage 36 through which the damper device 50 is supplied to the refrigerator compartment 3
Close. In this state, the temperature of the refrigerator compartment 3 increases, and the temperature is detected by the temperature sensor 50.
When A senses and reaches the set upper limit temperature R2 set in the control circuit unit 80, the control circuit unit 8
The condition that the damper device 50 opens the cold air passage 36 is set by the operation of 0. In this state, the damper device 50 can be controlled to open the cold air passage 36, but the freezer 5 or the cooler 24 can be controlled.
Is not increased to the set upper limit temperature F2, the compressor 20 and the blower 25 are turned off (
Since the cooler 24 is not in the cooling operation state and the cooler circulation is not performed by the blower 25, the cool air is not circulated to the refrigerator compartment 3 even if the damper device 50 is opened in this state. Moreover, when the damper device 50 opens the cold air passage 36 in this state, the temperature of the refrigerator compartment 3 affects the freezer compartment 5 and the cooler 24 through the cold air passage 36, and the temperatures of the freezer compartment 5 and the cooler 24 rise. This is an undesirable situation.

In view of such points, when the temperature of the refrigerator compartment 3 reaches the set upper limit temperature R2 and the compressor 20 and the blower 25 are in the ON (operation) state in order to perform appropriate cold air circulation to the refrigerator compartment 3. Moreover, it is preferable that the damper device 50 opens the cold air passage 36 so that the cold air is circulated to the refrigerator compartment 3.

In this way, the compressor 20 and the blower 25 are turned on (operation) by the operation of the control circuit unit 80.
And the OFF (stop) operation, the freezer compartment 5 is controlled in the range of the set lower limit temperature F1 and the set upper limit temperature F2, and the refrigerator compartment 3 is in the range of the set lower limit temperature R1 and the set upper limit temperature R2 by the opening / closing operation of the damper device 50. Controlled. In such a series of operations, the temperature of the refrigerator compartment 3, the temperature of the freezer compartment 5 or the cooler 24, the open / close state of the damper device 50, the ON / OFF of the compressor 20 and the blower 25.
The OFF state is shown in FIG.

As described above, the temperature of the refrigerator compartment 3 is controlled within a predetermined temperature range by opening and closing the cool air passage supplied to the refrigerator compartment 3 by the damper device 50, but the damper device 50 is in a state where the cooler passage 36 is closed. Then, since all the cold air circulated by the blower 25 is supplied to the freezer compartment 5, the freezer compartment 5 is sufficiently cooled. However, in a state where the damper device 50 opens the cold air passage 36, the cold air circulated by the blower 25 is diverted at a diversion ratio determined by the structure of the cold air passage leading to the freezer compartment 5 and the refrigerator compartment 3. For this reason, when the damper device 50 opens the cold air passage 36, the amount of cold air supplied to the freezer compartment 5 is smaller than when the damper device 50 is closed, and the cooling effect of the freezer compartment 5 is the damper device 50. Is lower than when the cold air passage 36 is opened.

In particular, in order to improve the low temperature storage effect of frozen food, it is desirable to maintain the temperature of the freezer compartment 5 at a sufficiently low temperature. For this reason, a decrease in the cooling function of the freezer compartment 5 in a state where the damper device 50 opens the cold air passage 36 as described above is not preferable. In order to improve such a decrease in the cooling function of the freezer compartment 5, the cold air flow ratio to the freezer compartment 5 and the refrigerator compartment 3 is supplied to the freezer compartment 5 when the damper device 50 opens the cold air passage 36. There is a method of using a cool air passage configuration that increases the amount of cool air. In this case, in order to cool the freezer compartment 5 to a lower temperature, the amount of the cold air supplied to the freezer compartment 5 is set to, for example, a diversion ratio of the cold air supplied to the freezer compartment 5 and the refrigerator compartment 3 as 8: 2. Although it is conceivable to increase it as much as possible, the cold air passage of the cold air supplied to the refrigerator compartment 3 has a bent passage shape depending on the relationship with the surrounding components, and thus has a large air path resistance. For this reason, when trying to increase the amount of cold air supplied to the freezer compartment 5 as much as possible as described above, the amount of cold air circulation to the refrigerator compartment 3 is extremely reduced by this large air path resistance, and the refrigerator compartment 3 There is a risk that will not cool.

For this reason, normally, in order to prevent this from happening, the diversion ratio of the cold air supplied to the freezer compartment 5 and the refrigerator compartment 3 is set to a relatively balanced diversion ratio such as approximately 5: 5 and 6: 4. A method is adopted in which a cold air passage is formed to smoothly circulate the cold air to the freezer compartment 5 and the refrigerator compartment 3. However, as it is, there is a possibility that the cooling effect of the freezer compartment 5 in a state where the damper device 50 opens the cold air passage 36 as described above may be reduced, and the present invention improves this.

That is, in the present invention, a cold air passage configuration in which the cold air circulation to the freezer compartment 5 and the refrigerator compartment 3 is performed smoothly, and in the refrigerator compartment cooling mode for supplying cold air to the refrigerator compartment 3 when in a normal cooling operation state, In order to facilitate the cooling of the freezer compartment 5, the operation state of the damper device 50 is set to an open / close operation state by time-sharing control. As a result, in this cold room cooling mode, compared to the conventional method in which the damper device 50 is kept open, the cold air supply to the cold room 3 becomes intermittent, and the amount of cold air supplied to the cold room 3 is increased. The total amount of supplied cold air circulated to the freezer compartment 5 is increased while the cooling of the refrigerator compartment 3 is maintained. For this reason, the cooling of the freezer compartment 5 is improved, and the cooling state of the freezer compartment 5 is improved. Of course, when the damper device 50 is open, the intermittent operation time of the damper device 50 is set so that an amount of cold air that does not cause cooling failure of the refrigerator compartment 3 is supplied to the refrigerator compartment 3.

As described above, the present invention includes the single cooler 24 in which the refrigerant compressed by the compressor 20 evaporates, and the cold air cooled by the cooler 24 is circulated to the refrigerator compartment 3 and the freezer compartment 5 by the blower 25. The temperature of the freezer compartment 5 is controlled by turning on (operating) and turning off (stopping) the compressor 20, and the cold air passage 36 supplied to the refrigerator compartment 3 is opened and closed by the damper device 50 to be stored in the refrigerator compartment 3.
In the refrigerator-freezer 1 in which the temperature of the refrigerator is controlled, the refrigerator compartment 5 can be cooled to a lower temperature while maintaining the cooling of the refrigerator compartment 3.

FIG. 7 shows the temperature of the refrigerator compartment 3, the temperature of the freezer compartment 5 or the cooler 24, the open / close state of the damper device 50, and the ON / OFF state of the compressor 20 and the blower 25. That is, the compressor 20 and the blower 25 are turned on (operated) until the freezer compartment 5 falls to the set lower limit temperature F1, and the set lower limit temperature F
When the pressure drops to 1, the compressor 20 and the blower 25 are turned off (stopped). Then, when the freezer compartment 5 rises to the set upper limit temperature F2, the compressor 20 and the blower 25 are turned on (operated) again and cooled down. On the other hand, the refrigerating room 3 has the damper device 50 in the refrigerating room cooling mode, that is, when the compressor 20 and the blower 25 are in the ON (operating) state and are equal to or higher than the set upper limit temperature R2.
Becomes a time-sharing control state, and cold air is intermittently supplied to the refrigerating chamber 3, and the damper device 50 is closed when the temperature is lowered to the set lower limit temperature R1. When the refrigerator compartment 3 rises to the set upper limit temperature R2 or more, the damper device 50 enters the time-division control state again, and cold air is intermittently supplied to the refrigerator compartment 3, so that the refrigerator compartment 3 It is controlled within the range of R1 and the set upper limit temperature R2.

In addition, when the refrigerator 1 is used, a large amount of food that has not been sufficiently cooled is stored in the refrigerator compartment 3.
Or when storing food at a high temperature in the refrigeration room 3 or the front door 10 of the refrigeration room 3.
The temperature of the refrigerator compartment 3 may rise abnormally, for example, when it is left open for a relatively long time. In this case, the temperature of the freezer compartment 5 and the cooler 24 rises beyond a predetermined range due to the influence. This abnormal situation can occur in both the ON state and the OFF state of the compressor 20 and the blower 25.

The present invention is also effective when this abnormal situation occurs. That is, when an abnormal situation occurs, since the refrigerator compartment 3 becomes equal to or higher than the set upper limit temperature R2, the temperature of the freezer compartment 5 or the cooler 24 also becomes equal to or higher than the set upper limit temperature F2. For this reason, the compressor 20 and the blower 2 are controlled by the control circuit unit 80.
5 is turned on (operated) to enter a cooling operation state in which the cooler 24 is cooled, and is in the refrigerator compartment cooling mode to supply cold air to the refrigerator compartment 3, so that the operation state of the damper device 50 is opened and closed by time division control. Activated. As a result, cooling of the freezer compartment 5 is promoted as well as cooling of the refrigerator compartment 3.

FIG. 7 shows the temperature of the refrigerator compartment 3 when an abnormal situation occurs in the ON state of the compressor 20 and the blower 25, the temperature of the freezer compartment 5 or the cooler 24, the open / close state by time-division control of the damper device 50, compression The ON / OFF state of the machine 20 and the blower 25 is shown. That is, when the compressor 20 and the blower 25 are turned on (operation), the freezer compartment 5 is cooled to the set lower limit temperature F1. On the other hand, the refrigerating room 3 is controlled to the set lower limit temperature R1 and the set upper limit temperature R2 by performing the opening / closing operation by the time-sharing control of the damper device 50 until the temperature decreases to the set lower limit temperature R1.

In the refrigerator compartment cooling mode in which the damper device 50 is opened and the cold air is circulated to the refrigerator compartment 3 as described above, the present invention sets the operation state of the damper device 50 to the opening / closing operation state by the time division control. Under control, the total ratio of the amount of cold air supplied to the freezer compartment 5 and the refrigerator compartment 3 by the blower 25 is set to the freezer compartment 5 rather than the amount of cold air divided into the refrigerator compartment 3 such as 3: 1, 4: 1, etc. By increasing the amount of cool air to be diverted, the cooling of the freezer compartment 5 is suppressed while maintaining the cooling of the refrigerator compartment 3.

As a specific control method, for example, the operating plate 52 opens the cold air passage 36 for 1 minute, 2
A control method for closing the minute, the control plate 52 opens the cold air passage 36 for one minute, and a control method for closing for three minutes,
For example, perform an intermittent opening and closing operation. As a result, compared to the state in which the damper device 50 remains open, the time for which the damper device 50 is open becomes one third, one quarter, etc., so the amount of cold air circulating in the refrigerator compartment 3 is Although the amount of cold air circulation to the freezer compartment 5 increases, the temperature rise of the freezer compartment 5 is suppressed, the temperature rise of the stored frozen food can be suppressed, and the good preservation state of the frozen food can be maintained. Become.

As described above, in the present invention, the single cooler 24 in which the refrigerant compressed by the compressor 20 evaporates.
The cooler 24 is provided with a cool air passage through which the cool air cooled by the cooler 24 is circulated by the blower 25 to the refrigerator compartment 3 and the freezer compartment 5, and the temperature of the freezer compartment 5 is set to ON (operation) of the compressor 20 and the blower 25. In the refrigerator-freezer 1 that is controlled by an OFF (stop) operation and the temperature of the refrigerator compartment 3 is controlled by the opening and closing operation of the damper device 50 that opens and closes the cold air passage, the cold air cooled by the cooler 24 is supplied to the refrigerator compartment 3. In the refrigerator compartment cooling mode, the operation state of the damper device 50 is set to an opening / closing operation state by time-sharing control.

In the present invention, the operation state of the damper device 50 is changed in the refrigerator cooling mode in both the normal cooling operation state and the abnormal situation in which the temperature of the refrigerator compartment 3 is abnormally increased by removing the normal cooling operation. Since it is not necessary to make a special design to increase the amount of cold air to the freezer compartment 5 compared to the amount of cold air to the refrigerator compartment 3 by setting the opening and closing operation state by time division control,
The structure of the cold air passage is simplified. Moreover, if the opening time and the closing time of the damper device 50 by time-sharing control are set according to the type of the refrigerator-freezer 1, the supply of cold air according to the type of the refrigerator-freezer 1 can be set, so that it matches the configuration of the cold-air passage. An appropriate cold air supply system can be established.

In the configuration of the refrigerator 1 as described above, the system of the second embodiment does not use the time-sharing control of the operation state of the damper device 50 in the normal cooling operation state, and the operation state of the damper device 50 only when an abnormal situation occurs. Is time-division control. That is, in the configuration of the first embodiment, a single cooler 24 that evaporates the refrigerant compressed by the compressor 20 is provided, and the cold air cooled by the cooler 24 is blown into the refrigerator compartment 3 and the freezer compartment 5 by the blower 25. The temperature of the freezer compartment 5 is controlled by ON (operation) and OFF (stop) operations of the compressor 20 and the blower 25, and the temperature of the refrigerator compartment 3 is controlled by a damper device 50 that opens and closes the cold air passage. In the refrigerator-freezer 1 controlled by the opening / closing operation, in the normal cooling operation mode, the damper device 50 opens the cold air passage to the refrigerator compartment 3 when the temperature of the refrigerator compartment 3 rises to the set upper limit temperature R2, and the temperature of the refrigerator compartment 3 When the temperature drops to the set lower limit temperature R1, an opening / closing operation for closing the cold air passage is performed, and in an abnormal temperature state where the temperature of the refrigerator compartment 3 is increased, the operation state of the damper device 50 is changed to an opening / closing operation state by time division control. Characterized by a.

This state is shown in FIG. That is, since the operation state of the damper device 50 is time-division controlled only when an abnormal situation occurs, a means for determining that an abnormal situation has occurred is provided. As one of means for detecting that an abnormal situation has occurred, a predetermined temperature R higher than the set upper limit temperature R2
3 is detected by the temperature sensing sensor 5A, it is determined by the determination means provided in the control circuit unit 80 that there is an abnormal situation.

In the normal cooling operation state, as described above, the compressor 20 and the blower 25 are ON / OFF controlled by the operation of the control circuit unit 80 based on the temperature sensing of the temperature sensing sensor 5A, and the freezer compartment 5 is set to the set lower limit temperature. Control between F1 and the set upper limit temperature F2 is performed. Further, the refrigerator compartment 3 is opened in the refrigerator compartment cooling mode, that is, when the compressor 20 and the blower 25 are in the ON (operating) state and the set upper temperature R2 or higher, the damper device 50 is opened and the cold air is stored in the refrigerator compartment 3. The damper device 50 is closed when the temperature falls to the set lower limit temperature R1. Then, when the refrigerator compartment 3 rises to the set upper limit temperature R2 or more, the damper device 50 is opened again, and cold air is supplied to the refrigerator compartment 3. In this way, the refrigerator compartment 3 is controlled within the range between the set lower limit temperature R1 and the set upper limit temperature R2.

When the abnormal situation as described above occurs and the temperature of the refrigerator compartment 3 exceeds the set upper limit temperature R2 and reaches a high temperature R3, the temperature detection sensor 50A detects this, and based on this, the control circuit unit 80 operates to place the damper device 50 in the time-sharing control state as described above. For this reason, the cold air sent out from the blower 25 is intermittently supplied to the refrigerator compartment 3, and the damper device 50 is closed when the temperature falls to the set lower limit temperature R1. When the refrigerator compartment 3 rises to the set upper limit temperature R2 or higher, the damper device 50 enters the time-division control state again, and the cold air is supplied to the refrigerator compartment 3, so that the refrigerator compartment 3 is set to the preset lower limit temperature R1. It will be controlled within the range of the upper limit temperature R2.

The temperature of the abnormal situation may be detected by a temperature sensing sensor 50B different from the temperature sensing sensor 50A. As another means for detecting an abnormal situation, there is a method of determining an abnormal situation when the temperature gradient rising from the set lower limit temperature R1 to the set upper limit temperature R2 is larger than a predetermined value. This is based on the temperature sensed by the temperature sensing sensor 50A or 50B, and it is determined that an abnormal situation has occurred when the temperature rise value per unit time exceeds or exceeds a predetermined value by the control circuit unit 80. There is a way. Even when an abnormal situation is detected by this method, the damper device 50 enters the time division control state as described above.

As described above, in the refrigerating room cooling mode, by setting the damper device to the open / close operation state by time-sharing control, the cooling effect of the freezing room is improved, and the form of the refrigerator-freezer is not limited. Various modifications can be considered without departing from the technical scope, and various embodiments according to the modifications are included.

It is a vertical side view of this invention refrigerator. (Example 1) It is explanatory drawing which looked at the refrigerator main body of this invention from the front. (Example 1) It is a perspective view of this invention damper device. (Example 1) It is a vertical side view of the part which attached this invention damper device to the refrigerator. (Example 1) It is a block diagram of the control part which concerns on this invention. (Example 1) It is explanatory drawing which shows the operation | movement of a damper apparatus and an electric compressor in the basic control action of this invention, and the temperature change of a refrigerator compartment and a freezer compartment. (Example 1) It is explanatory drawing which shows the operation | movement of the damper apparatus and electric compressor in the time division control operation | movement by this invention, and the temperature change of a refrigerator compartment and a freezer compartment. (Example 1) It is explanatory drawing which shows the operation | movement of the damper apparatus and electric compressor in the time division control operation | movement by this invention, and the temperature change of a refrigerator compartment and a freezer compartment. (Example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Refrigerator 2 ... Refrigerator main body 3 ... Refrigeration room 4 ... Vegetable room 5 ... Freezing room 5A, 5B ... Temperature sensor 20 ... Electric compressor 24 ... Cooler 25・ ・ Blower 35 ・ ・ Cooling air supply passage 36 ・ ・ Cooling air supply passage 50 of insulation partition wall ・ ・ Damper device 50A ・ ・ Temperature detection sensor 51 ・ ・ Electric mechanism 52 ・ ・ Operating plate 53 ・ ・ Damper case 54 ・ ・ Opening 55 ... DC motor 80 ... Control circuit section

Claims (2)

A single cooler for evaporating the refrigerant compressed by the compressor, and a cool air passage through which cool air cooled by the cooler is circulated to the refrigerating chamber and the freezer by the blower, and the temperature of the refrigerating chamber is In the refrigerator-freezer controlled by the opening / closing operation of the damper device that opens and closes the cold air passage, the operation state of the damper device is controlled by time-sharing control in the refrigerating room cooling mode in which the cold air cooled by the cooler is supplied to the refrigerating chamber. A refrigerator-freezer characterized by being opened and closed. A single cooler for evaporating the refrigerant compressed by the compressor, and a cool air passage through which cool air cooled by the cooler is circulated to the refrigerating chamber and the freezer by the blower, and the temperature of the refrigerating chamber is In the refrigerator-freezer controlled by the opening / closing operation of the damper device that opens and closes the cold air passage, the damper device opens the cold air passage to the refrigerator room when the temperature of the refrigerator compartment rises to a set upper limit temperature in the normal cooling operation mode. When the temperature of the refrigerating chamber is lowered to the set lower limit temperature, an opening / closing operation for closing the cold air passage is performed, and in an abnormal temperature state in which the temperature of the refrigerating chamber is increased,
A refrigerator-freezer characterized in that the operation state of the damper device is an open / close operation state by time-sharing control.

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