JPS6146373Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refrigerator equipped with a dual-purpose storage compartment that can be selectively used as either a freezing compartment or a refrigerating compartment.

In a so-called two-temperature type refrigerator that is equipped with a freezer compartment and a refrigerator compartment, in order to make effective use of the interior of the refrigerator, some of the compartments can be selectively used as either the freezer compartment or the refrigerator compartment. A refrigerator with separate compartments is provided. However, with refrigerators that generally use a fan to blow air cooled by a cooler into the refrigerator, it is possible to create a dual-purpose storage compartment relatively easily by simply controlling the amount of air blown into the refrigerator. It has been difficult to construct a so-called direct-cooling type refrigerator, in which cold air from coolers provided in the room and the refrigerator compartment are naturally convected, to have a dual-purpose storage compartment.

Therefore, the purpose of the present invention is to form a dual-purpose storage room that can be selectively used as either a freezer compartment or a refrigerator compartment, even though it is a so-called direct cooling type, and which can also be used as a refrigerator compartment. To provide a refrigerator with no risk of its internal temperature rising abnormally when used.

An embodiment of the present invention will be described below based on the drawings. In FIG. 1, reference numeral 1 denotes a heat insulating casing, in which a freezer compartment 4, a dual-purpose storage compartment 5, and a refrigerating compartment 6 are formed which are vertically partitioned by heat insulating partition walls 2 and 3. In addition, 7 is a box-shaped freezer compartment cooler disposed around the freezer compartment 4, 8 is a first cooler disposed along the bottom of the dual-purpose storage compartment 5, and 9 is a refrigerator for the dual-purpose storage compartment 5. A second cooler 10 is arranged in a bent state along the upper surface and the back wall surface, and 10 is a cooling room cooler arranged in the upper part of the back of the refrigerator compartment 4 so as to be inclined downward toward the rear. It is a vessel. The upper surface of the dual-purpose storage chamber 5, which is tilted downward toward the rear, has an inclination angle of θ (=10°) with respect to the horizontal direction, so that the second cooler 9 It also slopes downward to the rear at an angle of inclination of θ (=10°) with respect to the horizontal direction. Reference numeral 11 denotes a refrigerator compartment control switch (hereinafter referred to as RCS) attached to the refrigerator compartment cooler 10 to sense the temperature inside the refrigerator compartment 6, and when the detected temperature falls below a predetermined off temperature. A comparison is made in which the contact point C-A shown in FIG. 4 is closed, and the contact point C-B shown in FIG. It is a so-called constant cut-in configuration with a large differential. 12 is a control switch for the freezer compartment (hereinafter abbreviated as FCS), which is the control switch for the freezer compartment 4.
A structure that is arranged so as to be able to sense the temperature inside the device, is opened when the sensed temperature becomes below a predetermined off temperature, and is closed when the sensed temperature becomes above a predetermined on temperature. It is. Reference numeral 13 denotes a temperature-sensitive switch attached to the first cooler 8 to sense the temperature inside the dual-purpose storage chamber 5, and this switch is closed when the detected temperature rises to a predetermined value, for example, +7°C or higher. It is configured to open when the sensed temperature drops to, for example, -3°C or lower. Reference numeral 14 denotes an evaporation plate provided at the bottom of the heat insulating case 1; 15, the defrosting water from each of the coolers 7, 8, 9, and 10 is transferred to the evaporation plate 14;
A drain pipe 16 is an evaporating dish 14 for guiding the inside.
17 is a main condenser placed on the back side of the heat insulating case 1, 18 is an auxiliary condenser placed along the bottom surface of the evaporating dish 14, and 19 is a cooler for the freezer compartment. A defrosting heater 20 is attached to the outer surface of 7, and 20 is a first and second cooler 8.
and 9 are defrosting heaters attached to each outer surface.

FIG. 2 shows the configuration of the refrigeration cycle, which will be described below. That is, between the discharge port 16a and the suction port 16b of the compressor 16, an auxiliary capacitor 18, a main capacitor 17, a main capillary tube 21 with an inner diameter of 0.8 mm and an effective length of 1,600 mm, and a first capillary tube with an inner diameter of 0.7 mm and an effective length of 1,200 mm are connected. auxiliary capillary tube 22, the refrigerator compartment cooler 10 set to have an internal volume of 180 c.c., the second cooler 9 set to an internal volume of 120 c.c., and the internal volume to 750 c.c. The set freezer compartment coolers 7 are connected in series. In addition, the first auxiliary capillary tube 2
2. The first solenoid valve 23, which is the first flow path control device, bypasses the refrigerator compartment cooler 10 and the second cooler 9, and the second solenoid valve 23 has an inner diameter of 1.2 mm and an effective length of 250 mm.
and third auxiliary capillary tubes 24 and 25
A bypass path 26 is provided in which the second and third auxiliary capillary tubes 2 are connected in series.
A second solenoid valve 27 serving as a second flow path control device and an internal volume 180 c.c. .
The first cooler 8 is connected in series. The first solenoid valve 23 is a two-way valve that is closed only when energized, and the second solenoid valve 23 is a two-way valve that is closed only when energized.
Reference numeral 7 is a two-way valve that is opened only when energized, and as shown in FIG. One end of each tube 22 is connected, and one end of a second auxiliary capillary tube 24 is connected to the discharge port body 23b. In addition, in the second solenoid valve 27, as shown in FIG. 3b, a second
One end of each of the third capillary tubes 24 and 25 are connected to each other, and a pipe 28 connecting the second cooler 9 to the discharge port body 27b is connected. The first and second solenoid valves 23 and 27 are respectively arranged in recesses 29 formed in the back of the heat insulating housing 1.

Now, in Figure 4 showing the electric circuit configuration, 3
0 is a push button type defrosting switch, which switches to close contacts c and b when the push button 30a is pressed, and then closes the freezer compartment cooler 7.
It is configured to automatically return to close contact points c and a when the back surface temperature of the contact point reaches, for example, +10° C. or higher. Further, 31 is an anti-icing heater arranged to heat the refrigerant passage between the refrigerator compartment cooler 10 and the second cooler 9, and 32 is a manual changeover switch, which is connected to the power plug 33. The RCS 11, FCS 12, compressor 16, etc. are connected between both terminals as shown.

Next, the operation of this embodiment having the above configuration will be explained.

When the dual-purpose storage room 5 is used as a refrigerating room, the manual changeover switch 32 is opened. Therefore, if the temperature-sensitive switch 13 is open in this state, the second solenoid valve 23 is cut off and closed, and the refrigerant discharged from the compressor 16 flows as described below. That is, when the inside of the refrigerator compartment 6 is at a predetermined temperature or higher and the contacts C and B of the RCS 11 are closed, the first solenoid valve 23 is energized and closed, so that the air is discharged from the compressor 16. The high-temperature, high-pressure gas refrigerant passes through the auxiliary condenser 18, the main condenser 17, and the main capillary tube 21, and then passes through the first auxiliary capillary tube 22, where it is completely liquefied.
The refrigerant thus liquefied is used in the refrigerator compartment cooler 10,
After sequentially passing through the second cooler 9 and the freezer compartment cooler 7 and being evaporated in each, it is returned to the compressor 16. In this way, the freezer compartment 4, the dual-purpose storage compartment 5, and the refrigerator compartment 6 are cooled, and when the contact point C-A of the RCS 11 is closed due to the temperature drop in the refrigerator compartment 6, the first electromagnetic The valve 23 is de-energized and becomes open. Then, since the flow resistance of the first auxiliary capillary tube 22 is larger than the series flow resistance of the second and third auxiliary capillary tubes 24 and 25, the refrigerant after passing through the main capillary tube 21 are the bypass path 26, that is, the first solenoid valve 23, the second and third auxiliary capillary tubes 2
4 and 25 into the freezer compartment cooler 7, and the refrigerant is no longer supplied to the refrigerator compartment cooler 10 and the second cooler 9. Therefore,
Cooling operation only in the freezer compartment 4 proceeds, and when the FCS 12 is opened due to the temperature drop, the operation of the compressor 16 is stopped. Thereafter, the same operation as described above is repeated by restarting the operation of the compressor 15 by closing the FCS 12 in accordance with the rise in temperature within the freezer compartment 4. As described above, when the manual changeover switch 32 is opened, the RCS 11 causes the refrigerant to be sequentially supplied to the refrigerator compartment cooler 10, the second cooler 9, and the freezer compartment cooler 7; The switching control is performed so that the refrigerant is supplied only to the dual-purpose cooler 7, and the first one provided in the dual-purpose storage chamber 5
Of the second coolers 8 and 9, only the second cooler 9, which has a smaller internal volume, performs the cooling operation in the same mode as the refrigerator compartment cooler 10, so the dual-purpose storage compartment 5 is used as a refrigerator compartment. It is cooled to approximately the same temperature and atmosphere as No. 6. In such a case, if the internal temperature, especially the temperature of the first cooler 8, rises above a predetermined value (+7°C) due to high temperature and large amount of food being stored in the dual-purpose storage chamber 5, etc. , the temperature-sensitive switch 13 that senses this is closed, so that the second solenoid valve 27 is energized and opened. Therefore, when the refrigerant flows into the bypass path 26,
The refrigerant is supplied to both the first and second coolers 8 and 9 via the second electromagnetic valve 27, thereby rapidly cooling the interior of the dual-purpose storage chamber 5. Therefore, the internal temperature of the dual-purpose storage chamber 5 will not rise abnormally. The second solenoid valve 27 is opened when the temperature sensed by the temperature-sensitive switch 13 drops to -3°C in response to a decrease in the temperature inside the dual-purpose storage chamber 5, and the temperature-sensitive switch 13 is opened. It continues until

On the other hand, when the dual-purpose storage room 5 is used as a refrigerating room, the manual changeover switch 32 is closed and the second solenoid valve 27 is opened. If the second solenoid valve 27 is open in this way, the RCS
11, when the first electromagnetic valve 23 is closed, the refrigerant that has passed through the main capillary tube 21 is supplied to the refrigerator compartment cooler 10, the second cooler 9, and the freezer compartment cooler 7, Further, when the first solenoid valve 23 is opened by the RCS 11, the refrigerant passes from the bypass path 26 via the first solenoid valve 23 to the second solenoid valve 27, and is transferred to the first cooler 8,
It comes to be supplied to the second cooler 9 and the freezer compartment cooler 7. Therefore, when the manual changeover switch 32 is closed, both the first and second coolers 8 and 9 perform cooling operation in the same mode as the freezer compartment cooler 7, so the dual-purpose storage compartment 5 is cooled to approximately the same temperature and atmosphere as the freezer compartment 4.

In the above configuration, when the first solenoid valve 23 is disconnected and opened, that is, when the contact C-A of the RCS 11
When the gap is closed, the anti-icing heater 31 is energized and generates heat, which prevents freezing from occurring around the refrigerant passage between the refrigerator compartment cooler 10 and the second cooler 9. do. Further, when the contacts c and b of the defrost switch 30 are closed by the push button 30a,
While the operation of the compressor 16 is stopped, the defrosting heaters 19 and 20 are energized, thereby defrosting the freezer compartment cooler 7, the first and second coolers 8 and 9, and After this, turn on the defrost switch 3.
0 automatically returns to the closed state between contacts ca and a, the defrosting operation is stopped and driving of the compressor 16 is restarted.

In addition, it goes without saying that the present invention is not limited to the above embodiments, and can be implemented with various modifications without departing from the gist thereof.

According to the present invention, as can be understood from the above explanation, although it is a so-called direct cooling type in which cold air from the cooler is naturally convected, it is also a dual-purpose storage system that can be selectively used as either a freezer compartment or a refrigerator compartment. Furthermore, the mode of use of the dual-purpose storage compartment as described above can be extremely easily selected by simply operating a manual changeover switch, and when the dual-purpose storage compartment is used as a refrigerator compartment, the internal temperature It is possible to provide a refrigerator that is effective in that there is no risk of abnormally increasing the temperature.

[Brief explanation of the drawing]

The drawings relate to one embodiment of the present invention,
FIG. 1 is a longitudinal side view, FIG. 2 is a diagram showing a refrigeration cycle, FIG. 3 is a perspective view of a solenoid valve, and FIG. 4 is an electric circuit diagram. In the figure, 5 is a dual-purpose storage room, 6 is a cold storage room, and 8 is a first storage room.
9 is a second cooler, 10 is a refrigerator compartment cooler, 13 is a temperature-sensitive switch, 23 is a first solenoid valve (first flow path control device), 26 is a bypass path, 27
32 is a second electromagnetic valve (second flow path control device) and a manual changeover switch.

Claims (1)

[Scope of utility model registration request] A refrigerator compartment with a cooler for the refrigerator compartment. 1st and 2nd
A dual-purpose storage room with a cooler. a state in which the refrigerant is supplied to the refrigerator compartment cooler and the second cooler according to the temperature of the refrigerator compartment; and a state in which the refrigerant is caused to flow into a bypass path that bypasses the refrigerator compartment cooler; 1 flow path control device. A second flow path control device that is operated by a manual changeover switch to an open state in which refrigerant can be supplied from the bypass path to both the first and second coolers. A temperature-sensitive switch is provided to sense the temperature of the dual-purpose storage chamber and switches the second flow path control device to an open state when the sensed temperature is equal to or higher than a predetermined value. A refrigerator consisting of the above configuration.