JPH05782Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of industrial application The present invention relates to a refrigerator in which cold air is circulated at an accelerated rate within the refrigerator using a blower, and in particular relates to an improved configuration of a refrigerator in which compartments are formed within the refrigerator compartment.

(b) Conventional technology Conventionally, in this type of refrigerator, the interior of the refrigerator is divided by a partition wall to form a freezer compartment and a refrigerator compartment, and cold air cooled by a cooler in the refrigeration cycle is accelerated to both compartments by a blower. It is circulated and cooled. The temperature of the freezer compartment is normally maintained at a freezing temperature of, for example, -20°C on average by controlling the operation of the compressor of the refrigeration cycle and the aforementioned blower, but the temperature of the refrigerator compartment is controlled by damping the cold air flowing into it. A refrigeration temperature of, for example, an average of +5° C. is maintained by regulation by a thermostat.

Here, in case you do not want to freeze food that spoils quickly such as raw meat or fresh fish, there is a
54-183761, a compartment (low temperature container 20 in the publication) is formed which is cooled to a lower temperature than the refrigerator compartment.

(c) Problems to be solved by the invention In order to cool the aforementioned compartment to a temperature different from that of the refrigerator compartment, it is necessary to adjust the amount of cold air flowing into the compartment. The cool air supply to both chambers is adjusted by the damper-equipped thermostat body, which has two damper thermostats arranged side by side. However, with this type of gas-filled damper thermostat, the metal capillary tubes that are the temperature-sensing parts that communicate with the bellows that drive the damper plate must be drawn into both chambers from the main body, which requires installation work. This is troublesome and also imposes restrictions on the installation of the main body.
In addition, since the size of two damper thermostats is necessarily required, the internal volume of the refrigerator compartment is reduced, and if the main body is located at the rear of the compartment, the compartment becomes an obstacle, making it difficult to open the notch for adjusting the set temperature. There was a problem that made it difficult to operate.

(d) Means for solving the problems The present invention has been made to solve the problems, and the structure of the present invention will be explained below with reference to Examples.

The present invention provides a refrigerator 1 that includes a refrigerator compartment 9 and a compartment 2 that is set at a temperature lower than that of the refrigerator compartment.
8 and a second outlet 19 for discharging cold air into the compartment.
A mounting plate 21 provided at the upper part of the back wall of the refrigerator compartment has two openings 22 and 23 respectively corresponding to the
and a first opening/closing plate 33 and a second opening/closing plate 34 provided on one surface of this mounting plate and opening and closing the opening,
a damper device 20 comprising one motor 36 that is embedded in a heat insulating material on the other surface of the mounting plate and opens and closes the first and second opening/closing plates independently; It is equipped with a temperature control device 45 that controls the motor based on the temperature of the compartment 2 to maintain both chambers at a set temperature.

(E) Effect According to the present invention, since both opening and closing plates are driven by a single motor, the size can be reduced and the compartment can be expanded.
In addition, there are no restrictions on the setting of a temperature sensing part as in a gas-filled damper thermostat, and the length of the cold air path to the discharge port can be shortened. Furthermore, the opening/closing plate can be hidden by the compartment.

(F) Embodiments Next, embodiments will be explained with reference to the drawings. Figure 1 is a front view of the refrigerator 1 excluding the compartment case 3 and door forming compartment 2 which will be described later, Figure 2 is a sectional view taken along line A-A in Figure 1, and Figure 3 is the same as in Figure 1. FIG. 4 is a sectional view taken along line C--C in FIG. 1.
In the refrigerator 1, a heat insulating box body is formed by foaming and filling a heat insulating material 6 between an outer box 4 and an inner box 5. The interior of the refrigerator 1, which is open to the front, is partitioned into upper and lower sections by an insulating partition wall 7, with a freezing compartment 8 at the top and a refrigerator compartment 9 at the bottom.
A cooling chamber 10 is formed within the partition wall 7, in which a cooler 11 included in the refrigeration cycle is housed and installed. A blower chamber 13 is formed at the rear of the cooler 11 and communicates with the cooling chamber 10 and houses a blower 12 for sucking cold air that has exchanged heat with the cooler 11 and circulates it in the refrigerator at an accelerated rate. A motor 12M is provided in the heat insulating material 6. From the blower room 13, there is formed a duct 14 for a freezer compartment that communicates with it and extends upward, and a duct 15 for a refrigerator compartment and a duct 16 for a compartment compartment that branch downward to the left and right and extend apart from each other. 14 opens at the freezer compartment discharge port 17 on the back wall of the inner box 5 of the freezer compartment 8, and the refrigerator compartment duct 15 and compartment duct 16 open on the left and right at the upper part of the back wall of the inner box 5 of the refrigerator compartment 9. A first discharge port 18 and a second discharge port 19 arranged in parallel are opened, respectively. Both outlets 1
The damper device 20 of the present application is installed in the inner box 5 at the 8th and 19th sections.
is installed.

A perspective view of the damper device 20 is shown in FIG. The damper device 20 has a mounting plate 2 fixed to the inner box 5.
1. A first opening 22 and a second opening 23 bored in the mounting plate 21 corresponding to both the discharge ports 18 and 19;
Corresponding to both openings 22 and 23, respectively, both lower ends are rotatably fixed to the mounting plate 21 by hinges 25, 26 and 27, 28, respectively, and have sealing materials 29, 30 on the inner surfaces, respectively, and a leaf spring 31 is always attached. ,32
to cover the openings 22 and 23, respectively, and open the discharge port 1.
8, 19, the first opening/closing plate 33 and the second opening/closing plate 34, both opening/closing plates 33, 3
The duct 15 is fixed to the mounting plate 21 on the opposite side of the duct 15,
It consists of a gear case 37 having a motor 36 located within a distance of 16 mm and embedded in a heat insulating material 6 between both discharge ports 18 and 19. Opening/closing plates 33 and 34 pass through the mounting plate 21 from the gear case 37, respectively.
The pins 38 and 39 that come into contact with the back surface of the cylinder are ejecting.

The compartment case 3 has a box shape that opens forward, and the opening is closed by an inner door 40 so as to be openable and closable. The front end of the compartment case 3 is fixed to the lower surface of the partition wall 7, and the rear part is fixed to the mounting plate 21, etc., so that the compartment case 3 is located in front of the damper device 20 with a gap 41 therebetween. attached to the top. An extending portion 3A that extends rearward and opens from the rear wall of the compartment case 3 is formed, and this extending portion 3A
surrounds the second opening/closing plate 34, thereby
The opening/closing plate 34 faces into and communicates with the compartment 2, and the opening edge of the extending portion 3A is fixed to the mounting plate 21. At this time, the first opening/closing plate 33 is located within the interval 14 and communicated with the refrigerator 9.
Further, 42 is an electric compressor disposed at the bottom of the refrigerator 1.

FIG. 6 shows a block diagram of the electric circuit for temperature control of the refrigerator compartment 9 and compartment 2. 43 is a refrigerating room temperature detection device having a thermistor 43A for detecting the temperature inside the refrigerating room 9; 44 is a compartment temperature detector having a thermistor 44A for detecting the temperature inside the compartment 2; both detectors 43, 44 The output is input to the control device 45. Further, 46 is a temperature setting device for setting the temperature of both chambers 9, 2, and is provided on the front of the refrigerator 1, etc., and its output is inputted to a control device 45, which controls both detection sections 43, 44 and Temperature setting device 4
Motor 3 of damper device 20 based on the output of
Control 6.

Next, the operation will be explained using FIGS. 7 and 8. The electric compressor 42 and the blower 12 are stopped based on the temperature of the freezer compartment 8, and the cold air cooled by the cooler 11 is acceleratedly supplied to the ducts 14, 15, 16.
As a result, the inside of the freezer compartment 8 is cooled to an average of -20°C. Next, FIG. 7 shows the parts housed in the gear case 37. 48 is a gear interlocked with the motor 36 (AC motor), and gears 49 and 50 having the same diameter mesh with the left and right sides of the gear 48. gear 49,5
Cams 51 and 52 are respectively fixed to the rotation shaft of 0. The front surfaces of the cams 51, 52 are formed with half lower parts 51A, 52A and the higher parts 51B, 52B protruding forward from the lower parts 51A, 52A.
1 and 52 form a suitable inclined surface. ) are in contact with each other. or. When the setting is, for example, +5°C, the detector 43 outputs a high potential (hereinafter referred to as "H") when the temperature of the refrigerator compartment 9 becomes, for example, +8°C, and outputs a low potential (hereinafter referred to as "H") when the temperature reaches +2°C. ) is output. Further, when the setting is, for example, -1°C, the detector 44 outputs "H" when the temperature inside the compartment 2 becomes, for example, 0°C, and outputs "L" when it becomes -2°C.

Figure 8 shows the output of the detectors 43 and 44 and the motor 36.
The rotation angle of the gear 48 and the opening/closing plate 3 due to the rotation of
3 and 34 are shown. Now, when both chambers 9 and 2 are sufficiently cooled, the output of both detectors 43 and 44 is "L". At this time, the control device 45 controls the motor 36
As a result, the point P of the gear 48 is set at the 0° position in FIG. 7, and in this state, the cams 51 and 52 are respectively in the state shown in FIG. , at this time each pin 38, 39
are the lower parts 51A and 52 of the cams 51 and 52, respectively.
A and is pushed into the gear case 37, and the opening/closing plates 33, 34 close the discharge ports 18, 19 with leaf springs 31, 32. Therefore, cold air is not supplied to both chambers 9 and 2. When the temperature of the refrigerator compartment 9 rises from this state and reaches +8°C, the output of the detector 43 becomes H, and the control device 45 controls the motor 3.
6, the gear 48 is rotated 90 degrees counterclockwise from the state shown in FIG. 7, and the point P is set at 90 degrees in the figure. Along with this, the gear 49 moves clockwise in Fig. 7.
It rotates 90 degrees, and the gear 50 also rotates 90 degrees clockwise. As a result, the pin 38 comes into contact with the high portion 51B, whereby the pin 38 is pushed out and the first opening/closing plate 33 opens to open the first discharge port 18.
On the other hand, since the pin 39 is still in the lower part 52A, the second
There is no change in the opening/closing plate 34. This state is the state shown in FIG. In this state, the cold air flowing out from the first discharge port 18 flows down into the refrigerator compartment 9 through the space 41 between the compartment case 3 and is circulated and cooled.

From this state, the temperature of the refrigerator compartment 9 drops by +2℃
On the other hand, when the temperature of the compartment 2 rises and reaches 0° C., the output of the detector 43 becomes "L" and the output of the detector 44 becomes "H". Thereby the control device 45
drives the motor 36 and once sets the point P of the gear 48 to 0°
Return it to the position shown in Figure 7, and then rotate it 270 degrees counterclockwise. As a result, the cams 51 and 52 also rotate, and the pin 38 comes into contact with the lower portion 51A and the pin 39 comes into contact with the higher portion 52B. Therefore, the pin 39 is pushed out, the second opening/closing plate 34 is opened, the second discharge port 19 is opened, and the cold air flows into the compartment 2 to cool the interior of the compartment 2. At this time, the first opening/closing plate 33 is closed.

From this state, the temperature of the refrigerator compartment 9 rises again and +
When the temperature reaches 8°C, the output of the detector 43 becomes "H", while the output of the detector 44 is still "H", so the control device 45 drives the motor 36 and temporarily puts the gear 48 in the state shown in FIG. Return it and then rotate it 180° clockwise in the figure to bring point P to the 180° position. As a result, the cams 51, 52 are also rotated, and the pins 38, 3
9 come into contact with the respective high parts 51B and 52B. As a result, the opening/closing plates 33, 34
Both are opened, and both discharge ports 18 and 19 are opened, and cold air is supplied to both the refrigerator compartment 9 and the partitioned compartment 2 to cool them. In this state, the temperature of compartment 2 is -2℃
When the temperature of the refrigerator compartment 9 also drops to +2°C, the outputs of both the detectors 43 and 44 become "L", so the control device 45 returns the gear 48 to the state shown in FIG. Close the board.

By repeating the above steps, the refrigerator compartment 9 is brought to an average refrigeration temperature of +5°C, and the compartment 2 is brought to an average freezing storage temperature of -1°C. This freezing temperature storage temperature is based on the property that the freezing point of food is lower than the freezing point, and refers to the temperature at which food is on the verge of freezing, although it is at freezing point. By storing food in this temperature range, it is possible to preserve food. It can be stored for a relatively long time without freezing by suppressing the proliferation of bacteria, and furthermore, deterioration of flavor due to freezing can be prevented.

(G) Effects of the invention According to the invention, since the first and second opening/closing plates are opened and closed by a single motor to control the supply of cold air to the refrigerator compartment and compartment, it is different from the conventional method. Compared to the case where two damper thermostats are installed, the damper device can be made smaller and the operation can follow temperature changes better.In addition, since the motor is embedded in the insulation material, the depth dimension of the damper device can be reduced. The proportion of the internal volume of the refrigerator is reduced compared to conventional models, and the width of the damper device is also smaller, making it possible to embed the motor between the two ducts that guide cold air to the refrigerator compartment and compartment. As a result, the internal volume of the refrigerator can be expanded.
In addition, the first and second opening/closing plates can independently supply cold air to the refrigerator compartment and compartment, and the duct structure for introducing cold air into both compartments has been simplified, making it easier to route the cold air to both compartments. This makes it easier to control the temperature of the refrigerator compartment and compartment to a desired temperature.

[Brief explanation of drawings]

Each figure shows an embodiment of the present invention, and the first
The figure is a front view of the upper part of the refrigerator excluding the door and compartment, Figure 2 is a cross-sectional view taken along line A-A of Figure 1 with compartments installed, Figure 3 is a cross-sectional view taken along line B-B of Figure 4, and Figure 4 is a cross-sectional view taken along line B-B of Figure 1. Figure 5 is a perspective view of the damper device, Figure 6 is an electrical circuit diagram for temperature control of the refrigerator compartment and compartment, Figure 7 is a diagram showing the inside of the gear case, Figure 8 FIG. 2 is a diagram illustrating the operation of both opening and closing plates. 2... Compartment room, 9... Refrigerating room, 11... Cooler, 12... Air blower, 15... Refrigerating room duct,
16... Compartment duct, 18, 19... 1st,
Second discharge port, 20...damper device, 33,3
4...First and second opening/closing plates, 36...Motor, 3
7... Gear case.

Claims (1)

[Scope of utility model registration request] In a refrigerator equipped with a refrigerator compartment and a compartment set at a temperature lower than that of the refrigerator compartment, a first discharge port that discharges cold air to the refrigerator compartment and a second discharge port that discharges cold air to the compartment, respectively. a mounting plate having two corresponding openings and provided on the upper part of the back wall of the refrigerator compartment; a first opening/closing plate and a second opening/closing plate provided on one side of the mounting plate for opening and closing the opening; and the mounting plate. a damper device comprising one motor that is embedded in the heat insulating material on the other side of the plate and opens and closes the first and second opening/closing plates independently; and the temperature of the refrigerating room and the compartment room. A refrigerator comprising: a temperature control device that controls the motor based on.