JP5631284B2 - Freezer refrigerator - Google Patents

Description

  The present invention relates to a refrigerator-freezer provided with a refrigerator compartment.

  As a conventional refrigerator-freezer, a temperature detecting device for the quenching chamber at the lower part of the refrigerator compartment, a damper device and a fan for the quenching chamber are installed, and a quenching operation is carried out with respect to a control device for quenching food in this room. In some cases, the baffle opening of the damper device is adjusted by performing a fuzzy logic operation so as not to overcool the food (for example, see Patent Document 1).

  In addition, when the fan for the freezer compartment and the refrigerator compartment is provided, the temperature of the refrigerator compartment is controlled by opening and closing the damper device installed in the refrigerator compartment, and the state where the freezer compartment temperature is equal to or higher than a predetermined value continues for a certain period of time, There is one that controls to reduce the opening degree of the baffle of the damper device and to reduce the rotational speed of the fan for the refrigerating chamber (see, for example, Patent Document 2).

  Furthermore, regarding the control method of the damper device for the refrigerator compartment, when the freezer temperature and the refrigerator compartment temperature are higher than the set values, the opening operation of the baffle is adjusted by fuzzy logic operation, and the refrigerator operation is cooled. Some refrigerators close the baffle when the temperature in the refrigerator compartment is equal to or lower than a set value (for example, see Patent Document 3).

  In general, a damper device for a refrigerator compartment has a primary purpose of temperature control of the refrigerator compartment, calculates the detected temperature of the refrigerator compartment, and the inside of the refrigerator compartment becomes a predetermined temperature (for example, about 3 ° C. on average). Baffle open / close control is implemented. Here, there is naturally a device in which the temperature in the refrigerator compartment can be set according to the user's preference by a temperature operation panel or the like installed on the refrigerator compartment door or the like. At that time, the difference between the open point temperature and the close point temperature of the baffle of the cold room damper device is set as small as possible so that the temperature of the cold room is not greatly increased or lowered so that the water in the refrigerator room does not freeze. It is desirable that the temperature in the refrigerator compartment does not drop below freezing during cooling. In addition, regarding the quality effect on food, for example, maintaining the freshness of fresh food, etc., the smaller the temperature fluctuation in the refrigerator compartment, the smaller the effect.

  In addition, energy saving is one of the functions required of recent refrigerators, and it is essential to optimize the air passage structure or cold air distribution control, etc., and many documents related to damper device baffle control have been reported in the past. Has been.

JP-A-4-43276 (page 3, FIG. 1) Japanese Patent Laid-Open No. 4-186081 (page 3, FIG. 5) Japanese Patent Laid-Open No. 10-38435 (page 4-5, FIG. 6)

  However, in patent document 1, it is limited to the quenching chamber which is a part of the refrigeration chamber, and the food temperature is targeted by adjusting the baffle opening at the time of cooling and finally fully closing. There is a problem in that the reduction of power consumption during normal use as a refrigerator is not taken into consideration.

  Moreover, in patent document 2, when the load of a freezer compartment increases extremely and freezer compartment temperature rises, the baffle opening degree of the damper apparatus of a refrigerator compartment is adjusted, and the air volume to a freezer compartment is increased. There is a problem that the temperature of the refrigerator compartment becomes high during that time.

  And in patent document 3, although the opening degree of the baffle of the damper apparatus for refrigerator compartments at the time of cooling of a refrigerator compartment is adjusted, since a baffle may be half opened until the refrigerator compartment temperature becomes set temperature. In some cases, the compressor stops while the temperature of the refrigerator compartment is not lowered, and the temperature of the refrigerator compartment is high on average. Furthermore, when it is desired to lower the temperature of the refrigerator compartment, it is predicted that the baffle will eventually be fully opened and the cycle will only repeat full opening and closing. In addition, the temperature of the cold air that circulates in the refrigerator compartment and returns to the cooler is relatively high, which increases the temperature of the cooler. Therefore, the temperature of the cool air blown into the freezer compartment is slightly increased, and the cooling of the freezer compartment is delayed. Therefore, there is a problem that the operation of the compressor becomes long and power consumption is wasted. In order to prevent this, it is more efficient to cool the refrigerator compartment in a short time, and when it is judged that the refrigerator compartment is cooled, it is desirable that the baffle of the damper device for the refrigerator compartment is fully opened. The above-described baffle control method for the damper device for the refrigerator compartment has a problem that the fluctuation of the internal temperature cannot be reduced and the reduction of the power consumption may not be expected.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a refrigerator-freezer in which the temperature fluctuation in the refrigerator compartment is reduced and power consumption is suppressed.

  The refrigerator-freezer according to the present invention is disposed in a main body, a refrigeration chamber formed in the main body and refrigerated for food, and a cooling chamber formed on the rear side of the main body, and cools air flowing through the cooling chamber. A cooler for generating cold air, a duct part for sending cold air from the back side of the cold room to the cold room, a blower fan for sending cold air to the duct part, and an amount of cold air flowing from the cooling room to the duct part The damper device for the refrigerator compartment to be adjusted, the outside air temperature detecting means for detecting the outside air temperature, the refrigerator temperature detecting means for detecting the inside temperature of the refrigerator compartment, the operation of the blower fan, and the damper device for the refrigerator compartment A control device that performs the opening degree control, and the control device specifies the opening degree of the damper device for the refrigeration room based on the actually measured outside air temperature detected by the outside air temperature detecting means. In the state where the air blower fan is driven, the measured temperature in the refrigerator compartment, which is the internal temperature of the refrigerator compartment detected by the refrigerator compartment temperature detecting means, and a predetermined first refrigerator compartment preset temperature In comparison, as a result of the comparison, when the measured temperature of the refrigerator compartment is higher than the set temperature of the first refrigerator compartment, the opening degree of the damper device for the refrigerator compartment is fully opened, and the blower fan is driven, The actual temperature in the refrigerator compartment is compared with a predetermined second refrigerator compartment temperature that is lower than the preset temperature in the first refrigerator compartment. As a result of the comparison, the actual temperature in the refrigerator compartment is lower than the preset temperature in the second refrigerator compartment. In this case, the opening degree of the cold room damper device is set to the specific opening degree.

  According to the present invention, since the temperature difference between the first refrigeration room set temperature and the second refrigeration room set temperature can be set small with respect to the internal temperature of the refrigeration room, the measured temperature in the refrigeration room is stably controlled. be able to.

It is a front view of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is AA sectional drawing of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is a disassembled perspective view of the temperature operation panel 8 of the refrigerator-freezer according to Embodiment 1 of the present invention. It is a block diagram of the refrigerator apparatus 26 for refrigerator compartments of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is a flowchart which shows the temperature control operation | movement of the refrigerator compartment 1 of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is another flowchart for determining the opening degree of the baffle 29 of the damper apparatus 26 for refrigerator compartments in the temperature control operation | movement of the refrigerator compartment 1 of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is a state figure which shows the opening degree of the baffle 29 of the damper apparatus 26 for the refrigerator compartment of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is a time chart of operation | movement of the compressor 25 of the refrigerator refrigerator which concerns on Embodiment 1 of this invention, the temperature change of the cooler 18, the actual temperature change of the refrigerator compartment 1 and the freezer compartment 4, and the operation | movement of the baffle 29. It is a time chart of operation | movement of the compressor 25 of the conventional refrigerator-freezer, the temperature change of the cooler 18, the actual temperature change of the refrigerator compartment 1 and the freezer compartment 4, and the operation | movement of the baffle 29.

Embodiment 1 FIG.
(Structure of freezer refrigerator)
FIG. 1 is a front view of the refrigerator-freezer according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of the refrigerator-freezer.

  As shown in FIGS. 1 and 2, the refrigerator-freezer according to the present embodiment includes storage rooms of a refrigerator room 1, an ice making room 2, a switching room 3, a freezer room 4, and a vegetable room 5. Each of the storage rooms is partitioned by a heat insulating partition wall 6. Each storage room has a door attached to the front face so as to be freely opened and closed. Specifically, the refrigerator compartment door 1a for the refrigerator compartment 1, the ice making compartment door 2a for the ice making compartment 2, the switching compartment door 3a for the switching compartment 3, the freezing compartment door 4a for the freezing compartment 4, and the vegetable compartment 5 Is provided with a vegetable compartment door 5a, and by opening each door, it is possible to place and store stored items inside. Moreover, the upper surface, the back surface, the side surface, and the lower surface of the refrigerator-freezer according to the present embodiment are formed by the inner box 17.

  The layout of each storage room is not limited to that shown in FIGS. 1 and 2. For example, as shown in FIGS. 1 and 2, the refrigerating room 1 is positioned at the top. However, it is good also as the freezer compartment 4 being located in the uppermost stage.

  A control device 12 is accommodated in the inner box 17 on the back side of the refrigerator compartment 1, and this control device 12 converts the signal detected by the thermistor installed in each storage room into a temperature, and this temperature. Based on the above, temperature control of each storage room is performed, and processing such as operation and stop of the compressor 25 described later is performed. Moreover, the inside of the refrigerator compartment 1 is divided by the shelf 1b-1d made from resin or glass. In addition, in this Embodiment, although the shelf installed in the refrigerator compartment 1 shall be three, it is not limited to this. Among these, the accessory storage case 1e is installed under the lowest shelf 1d, and the interior of the accessory storage case 1e is 1 to 2 [° C.] lower than the upper shelf portion. This is because a cold air return port (an inlet of a return air passage 42 to be described later) in the refrigerator compartment 1 is formed under the accessory storage case 1e, and the low temperature cold air is more buoyant than the cold air having a higher temperature. It is because it is easy to stay below because of small. A plurality of pockets 1f (three in FIG. 2) are provided inside the freezer compartment door 1a. In addition, the inner wall of the refrigerator compartment 1 is formed by a control panel 47. The control panel 47 is formed by a resin part 48 on the design surface side (inside the cabinet) and a foam duct part 49 on the back side. Between the foamed duct component 49 and the inner box 17 that forms the back surface of the refrigerator-freezer, a duct portion 50 to which cool air generated by the cooler 18 described later is sent is formed. In each shelf of the control panel 47, air passage holes 56 for taking in cold air from the duct portion 50 are formed. Further, in the vicinity of the center of the resin component 48, a refrigerator compartment thermistor 51 that detects the internal temperature of the refrigerator compartment 1 is installed. The refrigerator compartment thermistor 51 detects the temperature detected by the control device 12. It is electrically connected to the control device 12 for transmitting information.

  The refrigerator compartment thermistor 51 corresponds to “refrigerator compartment temperature detecting means” of the present invention.

  The ice making room 2 is a storage room formed in the lower part of the refrigerator room 1 and on the left side in the front view of the refrigerator-freezer, and is equipped with an automatic ice making machine (not shown) in its interior. A certain ice making room door 2a is a drawer type. An ice making case 2b is installed in the ice making room 2, and the ice making case 2b can be pulled out by pulling the drawer type ice making door 2a forward.

  The switching chamber 3 is a storage chamber formed in the lower part of the refrigerator compartment 1 and on the right side in the front view of the refrigerator-freezer, and the switching chamber door 3a which is the door is a drawer type. A switching chamber case 3b is installed in the switching chamber 3, and the switching chamber case 3b can be pulled out by pulling the switching chamber door 3a forward. In addition, a switching room thermistor 52 that detects the internal temperature of the switching room 3 is installed on the inner wall of the switching room 3, and the switching room thermistor 52 is connected to the control device 12. In order to transmit the detected temperature information, the control device 12 is electrically connected.

  In the freezer compartment 4, a lower large storage case 4 b that is intended for long-term storage (for example, about one month), and a shallow upper shallow case 4 c placed on the flange portion of the lower large storage case 4 b. Is installed. In addition, a freezer compartment thermistor 53 that detects the internal temperature of the freezer compartment 4 is installed on the inner wall surface in the freezer compartment 4. In order to transmit the detected temperature information, the control device 12 is electrically connected.

  The freezer compartment thermistor 53 corresponds to the “freezer compartment temperature detection means” of the present invention.

  Further, the inner wall surfaces of the ice making chamber 2, the switching chamber 3 and the freezing chamber 4 are formed by a common fan grill 16. A space (hereinafter referred to as a cooling chamber) in which a cooler 18 is installed is formed between the fan grill 16 and the inner box 17 that forms the back surface of the refrigerator-freezer. In this cooling chamber, a defrosting heater 19 for defrosting the cooler 18 and a blower fan 24 for sending cold air generated by the cooler 18 to each storage chamber are installed. Further, at the bottom of the cooling chamber, the drain water of the cooler 18 melted by the defrost heater 19 is inserted into the machine chamber from a cooling chamber formed to feed the evaporating dish 21 installed in the machine chamber described later. A drain pipe 20 is formed. Further, the cooling room is provided with a cold room damper device 26 having an opening / closing mechanism for sending cold air into the duct portion 50, and its opening / closing operation is controlled by the control device 12 as will be described later. Further, the fan grill 16 has an opening / closing mechanism for sending cold air to the switching chamber 3, and is provided with a switching chamber damper device 27 having the same structure as the refrigerator compartment damper device 26. The opening / closing operation is controlled. Similarly, the fan grill 16 is provided with a damper device (not shown) having an opening / closing mechanism for feeding cool air into the freezer compartment 4, and the opening / closing operation of the fan grill 16 is controlled by the control device 12.

  In addition, a machine room is provided in the lower rear portion of the refrigerator-freezer of the present embodiment. In this machine room, drain water generated in the cooler 18 passes through the drain pipe 20 as described above. The evaporating tray 21 to be discharged and the compressor 25 for circulating the refrigerant in the cooler 18 are installed.

  The vegetable room 5 is a storage room arranged at the lowest stage in the refrigerator-freezer according to the present embodiment and is slightly higher in temperature than the refrigerator room 1, but is basically a storage room in a refrigerator temperature zone. is there. The vegetable compartment 5 is placed in a lower storage case 5b for storing larger vegetables and the flange portion of the lower storage case 5b, and is shallow for storing leafy vegetables and small vegetables. An upper storage case 5c at the bottom is installed. The vegetable room 5 is cooled using the return air passage 42 from the refrigerator compartment 1. The return air passage 42 has an entrance formed in the lower part of the refrigerating chamber 1, extends rearward of the switching chamber 3 and the freezing chamber 4, and has an opening (see FIG. (Not shown). Therefore, the cold air in the refrigerator compartment 1 that has flowed into the return air passage 42 flows into the vegetable compartment 5 from the opening through the return air passage 42. And the cold air | gas which flowed into this vegetable compartment 5 is suck | inhaled from another opening part (not shown) connected to a cooling chamber, and returns to a cooling chamber.

FIG. 3 is an exploded perspective view of temperature control panel 8 of the refrigerator-freezer according to Embodiment 1 of the present invention.
As shown in FIG. 3, a temperature operation panel 8 capable of adjusting the internal temperature of each storage room is installed in the freezer compartment door 1 a that is a door of the refrigerator compartment 1. An outside air temperature detection thermistor 10 that detects the outside air temperature is mounted on the substrate 9 installed inside the temperature operation panel 8.
In addition, although the temperature operation panel 8 shall be provided in the freezer compartment door 1a, it is not limited to this, For example, it is good also as what is provided in the refrigerator compartment 1.
In addition, the outside temperature detection thermistor 10 is mounted on the substrate 9. However, the invention is not limited to this. For example, the outside temperature detection thermistor 10 is provided in the upper hinge device portion 11 of the freezer compartment door 1a. It may be configured to be installed.
The outside temperature detection thermistor 10 corresponds to “outside temperature detection means” of the present invention.

  As an example of the operation of adjusting the internal temperature of each storage room by the temperature operation panel 8, the internal temperature of the cold room 1 is adjusted by the cold room temperature adjustment button 8a, and the switching room 3 is adjusted by the switching room temperature adjustment button 8b. The operation for adjusting the internal temperature will be described. The refrigerator compartment temperature adjustment button 8 a and the switching room temperature adjustment button 8 b are both installed on the surface side of the temperature operation panel 8. The user presses the cold room temperature adjustment button 8a to set the internal temperature of the cold room 1 to “weak” (for example, about 6 [° C.]), “medium” (for example, about 3 [° C.]) or The setting operation can be performed by switching “strong” (for example, about 1 [° C.]). Similarly, the user presses the switching room temperature adjustment button 8b, so that the inside temperature of the switching room 3 is weakly frozen (for example, about −7 [° C.]) suitable for frozen storage for about two weeks. ), Or a strong refrigeration (for example, about −18 [° C.]) suitable for freezing storage for about one month, and the setting operation can be performed.

(Structure of damper device 26 for refrigerator compartment)
FIG. 4 is a structural diagram of the refrigerator device 26 for the refrigerator compartment of the refrigerator-freezer according to Embodiment 1 of the present invention. 4A is a front view of the damper device 26 for the refrigerator compartment, FIG. 4B is a sectional view taken along the line BB of the damper device 26 for the refrigerator compartment, and FIG. 4C is the refrigerator compartment. 3 is an exploded perspective view of a room damper device 26. FIG. Hereinafter, the structure of the refrigerator device 26 for a refrigerator compartment will be described with reference to FIG.

  As shown in FIG. 4A, the cold room damper device 26 includes a gear storage case 28, a baffle 29, a cold air leakage prevention sheet 30, and a frame 31.

  The gear storage case 28 stores a stepping motor 34 and a gear part 35 that decelerates and transmits the output of the stepping motor 34 to the baffle 29. Further, the gear storage case 28 is fixed to the frame 31 by screws 36. A lead wire 32 extending to the outside from the gear storage case 28 is for supplying power to the stepping motor 34 and the like, and is electrically connected to the control device 12. Further, in the gear storage case 28, there is a fitting portion that rotates via the gear part 35 by the rotational drive of the stepping motor 34, and the connection shaft 33 is fitted to the fitting portion. The other end of the connection shaft 33 is fitted to the baffle 29.

  The baffle 29 has a plate shape that opens and closes a cool air passage portion 38 of a frame 31 to be described later, and a circular boss 37 is formed at an end portion on an extension line of the shaft of the connecting shaft 33 fitted. The circular boss 37 is fitted into a recess formed in the frame 31. That is, the baffle 29 rotates around the centers of the connection shaft 33 and the circular boss 37.

  The frame 31 is formed with a cool air passage portion 38, and the cold air generated by the cooler 18 is sent to the duct portion 50 side through the cold air passage portion 38. As described above, the cold air passing portion 38 is opened and closed as the baffle 29 rotates. Further, the periphery of the cool air passage portion 38 is surrounded by the outer frame rib 39.

  The cold air leakage prevention sheet 30 is a foamed polyurethane or polyethylene foam sheet, and is attached to the baffle 29. When the baffle 29 is fully closed, the cold air leakage prevention sheet 30 is in close contact with the outer frame rib 39 of the cold air passage 38. It is supposed to be.

  As described above, the structure of the cold room damper device 26 has been described. However, as described above, the switching chamber damper device 27 also has the same structure. However, since it is desirable to set the opening area of the cold air passage 38 according to the capacity of the storage chamber into which the cold air is sent, the damper device 26 for the refrigerator room 1 is more suitable for the size of the damper device. The damper device 27 is larger.

(Temperature control operation of the refrigerator compartment 1)
FIG. 5 is a flowchart showing the temperature control operation of the refrigerator compartment 1 of the refrigerator-freezer according to Embodiment 1 of the present invention. FIG. 6 shows the damper for the refrigerator compartment in the temperature control operation of the refrigerator compartment 1 of the refrigerator-freezer. It is another flowchart for determining the opening degree of the baffle 29 of the apparatus 26, and FIG. 7 is a state diagram which shows the opening degree of the baffle 29 of the damper apparatus 26 for the refrigerator compartment of the refrigerator-freezer. Hereinafter, the temperature control operation of the refrigerator compartment 1 will be described with reference to FIGS. 5 and 6.

(S1)
The control device 12 determines whether the actually measured temperature Fr, which is the internal temperature of the freezer compartment 4 detected by the freezer compartment thermistor 53, is higher than the first freezer compartment set temperature Fs. As a result of the determination, if the measured temperature Fr is higher than the first freezer compartment set temperature Fs, the process proceeds to step S2. On the other hand, if the measured temperature Fr is equal to or lower than the first freezer compartment set temperature Fs, step S2 is skipped and the process proceeds to step S3.

(S2)
The control device 12 drives the compressor 25 and the blower fan 24. As a result, the cooler 18 generates cold air.

(S3)
The control device 12 determines whether or not the actually measured temperature Fr is higher than the second freezer compartment set temperature Fe (Fe <Fs). As a result of the determination, if the measured temperature Fr is higher than the second freezer compartment set temperature Fe, the process proceeds to step S6. On the other hand, if the measured temperature Fr is equal to or lower than the second freezer compartment set temperature Fe, the process proceeds to step S4.

(S4)
The control device 12 determines that the inside temperature of the freezer compartment 4 is in a low temperature state, and stops the driving of the compressor 25 and the blower fan 24 in order to stop the generation of cool air from the cooler 18. Then, the process proceeds to step S5.

(S5)
The control device 12 fully closes the baffle 29 of the cold room damper device 26 for the cold room 1. Then, the process returns to step S1.

  Accordingly, the first freezer compartment set temperature Fs is a cooling operation start point, that is, an operation start point of the compressor 25 and the like because the internal temperature of the freezer compartment 4 is high and cooling is required. The second freezer compartment set temperature Fe is the cooling operation end point, that is, the operation end point of the compressor 25 and the like because the internal temperature of the freezer compartment 4 is low and cooling is unnecessary.

(S6)
The control device 12 determines that the cooling operation of the refrigerator compartment 1 is necessary, and determines whether or not the actually measured outside air temperature Tg, which is the outside temperature detected by the outside temperature detecting thermistor 10, is lower than the set temperature Ts. As a result of the determination, if the outside air actually measured temperature Tg is lower than the set temperature Ts, the process proceeds to step S7. On the other hand, when the outside air actually measured temperature Tg is equal to or higher than the set temperature Ts, the process proceeds to step S8.

(S7)
The control device 12 sets the opening A of the baffle 29 in the refrigerator compartment damper device 26 to “1”. Here, the opening degree A indicates a value based on the angle between the baffle 29 and the opening surface of the cool air passage portion 38. Here, for example, when the opening degree A = 1, the opening degree A is about 7 degrees. To do. Then, the process proceeds to step S9.

(S8)
The control device 12 sets the opening A of the baffle 29 in the cold room damper device 26 to “2”. Here, when the opening degree A = 2, it is assumed to be about 21 degrees, for example. Then, the process proceeds to step S9.

  In the above steps S7 and S8, the opening degree A of the baffle 29 in step S13 to be described later is selected and set, for example, when the outside air temperature becomes 10 degrees or less, the amount of heat leakage becomes small. That is, since the temperature difference between the outside air and the inside of the refrigerating chamber 1 becomes small, it becomes difficult for the heat to escape from the refrigerating chamber 1, so that strong cooling of the refrigerating chamber 1 is unnecessary or cooling itself may be unnecessary. .

  In the case of the above opening degree A = 1, 2, the respective angles are set to about 7 degrees and 21 degrees, but this is an example, and it goes without saying that other values may be used.

  Further, in the flowchart shown in FIG. 5, the case where the opening degree A of the baffle 29 is selected in two ways is shown, but the present invention is not limited to this, and as shown in FIG. May be set in multiple stages. As shown in FIG. 6, the control device 12 sets the opening degree A using set temperatures Ts1 to Ts3 (Ts1 <Ts2 <Ts3) as temperatures to be compared with the actually measured outside air temperature Tg. Specifically, the control device 12 compares the outside air actually measured temperature Tg with the set temperatures Ts1 to Ts3 (steps S21, S23, and S25). As a result of the comparison, when it is determined that Tg <Ts1, the control device 12 sets the opening degree A to “1” (step S22). If it is determined that Ts1 ≦ Tg <Ts2, the opening degree A is set to “2” (step S24). If it is determined that Ts2 ≦ Tg <Ts3, the opening degree A is set to “3” (step S26). And when it determines with Tg> = Ts3, the opening degree A is set to "4" (step S27). As described above, the controller 12 sets the opening degree A of the baffle 29 in multiple stages such as “1” to “4” based on the actually measured outside air temperature Tg, thereby enabling finer temperature control.

Here, as shown in FIG. 7, various opening states of the baffle 29 of the cold room damper device 26 will be described. Here, for example, the capacity of the refrigerator-freezer according to the present embodiment is of the 500 [L] class, the capacity of the refrigerator compartment 1 is around 270 [L], and the cold air passage section 38 of the damper device 26 for the refrigerator compartment. Is 24 [mm] × 125 [mm] = 3000 [mm ² ]. First, FIG. 7A shows a state where the baffle 29 is fully closed, that is, a state where the angle between the baffle 29 and the opening surface of the cool air passage 38 (hereinafter simply referred to as “the angle of the baffle 29”) is 0 degree. It is shown. FIG. 7B shows a state in which the angle of the baffle 29 is about 7 degrees (3 [mm] × 125 [mm] = 375 [375] so as to be 10 to 15% of the area of the cold air passage 38. mm ² ]). FIG. 7C shows a state in which the angle of the baffle 29 is about 14 degrees (6.5 [mm] × 125 [mm] == 25 to 30% of the area of the cold air passage 38). 812.5 [mm ² ]). FIG. 7D shows a state in which the angle of the baffle 29 is about 21 degrees (9.9 [mm] × 125 [mm] == 37 to 43 [%] of the area of the cold air passage 38. 1237.5 [mm ² ]). Here, for example, in the flowchart shown in FIG. 6, when the opening A = 1, the angle of the baffle 29 is 0 degree (FIG. 7A), and when the opening A = 2, the angle of the baffle 29 is changed. When the opening A = 3, about 7 degrees (FIG. 7B), the angle of the baffle 29 is about 14 degrees (FIG. 7C), and when the opening A = 4, the angle of the baffle 29 is What is necessary is just to set like about 21 degree | times (FIG.7 (d)).

Further, the upper limit value of the angle of the baffle 29 is not set to a very large angle, and is set to about 30 degrees or less, for example. As shown in FIG. 7, the baffle 29 in the present embodiment has a frame 31 with a flange portion having a height of 20 [mm], and within the rotation range of about 30 degrees or less, the baffle 29 and the frame 31. However, if the angle of the baffle 29 as shown in FIG. 7E is set to a large angle such as about 60 degrees, the area approximately the same as the opening area of the cool air passage 38 is obtained. It is because it will open and it will not change with the cold air flow rate in the fully open state (90 degrees).
It should be noted that, as described above, the “full open state” includes the opening degree at which the cool air flow rate that is not different from the fully open state (90 degrees) is obtained.

(S9)
The control device 12 determines whether or not the actually measured temperature Rr, which is the internal temperature of the refrigerator compartment 1 detected by the refrigerator compartment thermistor 51, is higher than the first refrigerator compartment set temperature Rs. As a result of the determination, if the measured temperature Rr is higher than the first refrigerator compartment set temperature Rs, the process proceeds to step S10. On the other hand, when measured temperature Rr is below 1st refrigerator compartment set temperature Rs, step S10 is skipped and it progresses to step S11.

(S10)
The control device 12 fully opens the opening A of the baffle 29. This is because the cooling of the refrigerator compartment 1 is completed in a short time because the internal temperature of the refrigerator compartment 1 is high. Then, the process proceeds to step S11.

(S11)
The control device 12 determines whether or not the actually measured temperature Rr is higher than the second refrigerator compartment set temperature Re (Re <Rs). As a result of the determination, if the measured temperature Rr is higher than the second refrigerator compartment set temperature Re, the process proceeds to step S12. On the other hand, if the measured temperature Rr is equal to or lower than the second refrigerator compartment set temperature Re, the process proceeds to step S13.

(S12)
The control device 12 leaves the opening degree of the baffle 29 as it is. Then, the process returns to step S1.

(S13)
The control device 12 adjusts the opening A of the baffle 29 so as to be the opening A set in step S7 or step S8. Then, the process returns to step S1.

  Accordingly, the first refrigerating room set temperature Rs indicates the fully open point of the baffle 29 of the refrigerating room damper device 26 because the internal temperature of the refrigerating room 1 is high and cooling is required. The second refrigerating room set temperature Re is low in the temperature of the refrigerating room 1 and indicates the closing point of the baffle 29 in the conventional case, but in the present embodiment, in step S7 or step S8. Since the set opening can be selected, “half open point” is indicated.

  FIG. 8 is a time chart of the operation of the compressor 25 of the refrigerator-freezer according to Embodiment 1 of the present invention, the temperature change of the cooler 18, the actual temperature change of the refrigerator compartment 1 and the freezer compartment 4, and the operation of the baffle 29. It is. FIG. 9 is a time chart of the operation of the compressor 25 of the conventional refrigerator-freezer, the temperature change of the cooler 18, the actual temperature change of the refrigerator compartment 1 and the freezer compartment 4, and the operation of the baffle 29.

(Section (1))
As shown in FIG. 8, when the measured temperature Fr reaches the first freezer compartment set temperature Fs, the control device 12 starts the operation of the compressor 25. At this time, the measured temperature Rr normally reaches the first refrigerator compartment set temperature Rs, so that the baffle 29 is fully opened and the refrigerator compartment 1 starts to be cooled. At this time, the relatively high temperature cool air returning from the refrigerator compartment 1 returns to the cooling chamber in which the cooler 18 is installed, so that the cooler 18 is cooled by the refrigerant, but the relatively high temperature Due to the cold air, it becomes flat at the predetermined temperature E1. Thus, when the temperature of the cooler 18 is the predetermined temperature E1, naturally the temperature of the cold air blown into the freezer compartment 4 is also increased, and the measured temperature Fr is also leveled off.

(Section (2))
Next, when the refrigerator compartment 1 is cooled and the measured temperature Rr decreases and reaches the second refrigerator compartment set temperature Re, that is, the half-opening point of the baffle 29, the baffle 29 is opened at step S7 or step S8 in FIG. The degree A is controlled. At this time, since the opening A of the baffle 29 is not large, the cooling of the freezer compartment 4 is not hindered, and the operation of the compressor 25 is continued until the actually measured temperature Fr reaches the second freezer compartment set temperature Fe. The cooling of the freezer compartment 4 is also continued. At this time, compared with the section (2) shown in FIG. 9, the actually measured temperature Rr is an effect that the baffle 29 is controlled to the opening degree A and the cold air is sent to the refrigerator compartment 1. It is difficult to rise.

(Section (3))
When the measured temperature Fr of the freezer compartment 4 reaches the second freezer compartment set temperature Fe, the drive of the compressor 25 is stopped, so that the internal temperatures of the refrigerator compartment 1 and the freezer compartment 4 rise. At this time, since the baffle 29 is in a fully closed state, the temperature gradient of the internal temperature of the refrigerator compartment 1 and the freezer compartment 4 is the same in the section (3) in both FIGS. However, in FIG. 8, since the initial temperature of the actually measured temperature Rr in the section (3) is lower, when the cooling stop time has elapsed, that is, when the actually measured temperature Fr reaches the first freezer compartment set temperature Fs, In FIG. 8, the actually measured temperature Rr of the refrigerator compartment 1 is lower.

  From the above, the refrigerator-freezer according to the present embodiment shown in FIG. 8 has the first refrigerator compartment set temperature Rs and the second refrigerator compartment preset temperature Re, compared to the conventional refrigerator-freezer shown in FIG. The temperature difference can be set small.

(Effect of Embodiment 1)
Since the temperature difference between the first refrigeration room set temperature Rs and the second refrigeration room set temperature Re can be set small with respect to the internal temperature of the refrigeration room 1 as described above, the measured temperature Rr is It can be controlled stably.

  Moreover, since the set temperature difference can be reduced as described above, the section (1) that is the period for cooling the refrigerator compartment 1 can be shortened and the operation time of the compressor 25 can be shortened, thereby reducing power consumption. It becomes possible.

  1 refrigerator compartment, 1a refrigerator compartment door, 1b-1d shelf, 1e accessory storage case, 1f pocket, 2 ice making room, 2a ice making room door, 2b ice making room case, 3 switching room, 3a switching room door, 3b switching room case, 4 Freezer room, 4a Freezer room door, 4b Lower large storage case, 4c Upper shallow case, 5 Vegetable room, 5a Vegetable room door, 5b Lower storage case, 5c Upper storage case, 6 Thermal insulation partition wall, 8 Temperature control panel, 8a Cold room temperature adjustment button, 8b Switching room temperature adjustment button, 9 Substrate, 10 Outside air temperature detection thermistor, 11 Upper hinge device part, 12 Control device, 16 Fan grill, 17 Inner box, 18 Cooler, 19 Defrost heater , 20 Drain pipe, 21 Evaporating dish, 24 Blower fan, 25 Compressor, 26 Damper device for cold room, 27 Damper device for switching room, 28 A Storage case, 29 Baffle, 30 Cold air leakage prevention sheet, 31 Frame, 32 Lead wire, 33 Connection shaft, 34 Stepping motor, 35 Gear parts, 36 Screw, 37 Circular boss, 38 Cold air passage part, 39 Outer frame rib, 42 Return air path, 47 Control panel, 48 Resin part, 49 Foam duct part, 50 Duct part, 51 Cold room thermistor, 52 Switching room thermistor, 53 Freezer room thermistor, 56 Air duct hole.

Claims (2)

The body,
A refrigerator compartment formed in the main body for refrigerated food;
A cooler that is disposed in a cooling chamber formed on the rear side of the main body and cools air flowing through the cooling chamber to generate cool air;
A duct part for sending cold air from the back side of the refrigerator compartment into the refrigerator compartment;
A blower fan for sending cold air to the duct part;
A refrigerating room damper device for adjusting the amount of cold air flowing from the cooling room to the duct part;
An outside air temperature detecting means for detecting the outside air temperature;
Refrigeration room temperature detecting means for detecting the temperature in the refrigerator compartment;
A control device for performing the operation of the blower fan and the opening degree control of the damper device for the refrigerator compartment;
With
The control device
Based on the outside air actually measured temperature that is the outside temperature detected by the outside air temperature detecting means, a specific opening degree is set for the opening degree of the cold room damper device,
In a state in which the blower fan is driven, a comparison is made between the measured temperature of the refrigerator compartment, which is the temperature inside the refrigerator compartment detected by the refrigerator compartment temperature detecting means, and a predetermined first refrigerator compartment set temperature, and the comparison As a result, when the measured temperature in the refrigerator compartment is higher than the set temperature in the first refrigerator compartment, the opening degree of the damper device for the refrigerator compartment is fully opened,
In the state in which the blower fan is driven, the measured temperature in the refrigerator compartment is compared with a predetermined second refrigerator compartment temperature that is lower than the first refrigerator compartment set temperature, and as a result of the comparison, the refrigerator compartment measured temperature is compared. When the temperature is lower than the set temperature of the second refrigerator compartment, the refrigerator opening device sets the opening degree of the refrigerator compartment damper device to the state of the specific opening degree. The refrigerator according to claim 1, wherein the control device sets the specific opening larger as the outside air actually measured temperature is higher.

Images