JPH0827131B2 - Freezer refrigerator - Google Patents

Description

Description: [Industrial field of application] The present invention relates to a refrigerator-freezer that performs normal cooling operation and rapid cooling operation selectively.

[Prior Art] FIGS. 4 to 6 are views showing a conventional refrigerator-freezer disclosed in, for example, Japanese Patent Laid-Open No. 63-207967, FIG. 4 is a vertical side view, and FIG. 5 is a circuit diagram. , FIG. 6 is a flowchart showing the operation.

In FIG. 4, (1) is a refrigerator main body, (2) is a freezing room suitable for freezing and storing foods, (3) is a temperature setting inside the refrigerator installed in a door for opening and closing the freezing room (2), etc. Variable resistor,
(4) is a cooler installed inside the freezer compartment (2),
(5) is a fan motor for circulating cold air, (6) is a compressor for compressing refrigerant in a refrigeration cycle, (7) is a temperature detector including a thermistor installed in the freezing compartment (2), and (8)
Is a control unit connected to the variable resistor (3), the temperature detector (7), the fan motor (5) and the compressor (6), and (9) is an AC power source connected to the control unit (8). .

In FIG. 5, (10) and (11) are temperature detectors (7), respectively.
And a resistor connected in series with the variable resistor (3), (1
2) is a microcomputer (hereinafter referred to as a microcomputer)
In addition, a CPU, a memory, etc. (none of which are shown) and an A / D converter (12a) (12b) are provided, and the A / D converters (12a) (12b) are respectively a temperature detector (7) and a variable resistor. Connected to the vessel (3). (13) is a compressor drive circuit connected to the microcomputer (12), (14) is a fan motor drive circuit,
Similarly, (15) is a switch drive circuit, (16) to (18) are relays connected to the drive circuits (13) to (15), respectively (1
9) is a high speed drive capacitor connected between the contacts of the fan motor (5) and the relay (18), (20) is a low speed drive capacitor, and the low speed drive capacitor (20) is a high speed drive capacitor (19). ) Is set to a smaller capacitance.

The conventional refrigerator / freezer is configured as described above, and when the compressor (6) is operated, the refrigerant is compressed and circulates in the refrigeration cycle, and the cooler (4) exchanges heat with the surrounding air. The cold air is generated. This cool air is forcibly circulated in the cold storage by the fan motor (5) as indicated by the arrow in FIG. 4, and the entire cold storage is cooled. The temperature in the freezer compartment (2) is adjusted by controlling the operation of the compressor (6) and the fan motor (5) by the control unit (8).

Next, the above operation will be described with reference to FIG. In addition,
The program of this flowchart is stored in the memory of the microcomputer (12).

First, in step S1, the set temperature (voltage at the connection between the variable resistor (3) and the resistor (11)) and the internal temperature (voltage at the connection between the temperature detector (7) and the resistor (10)) are set. , A / D conversion sections (12a) and (12b) are used to convert into digital values and read. Then, in step S2, it is determined whether the temperature inside the refrigerator is higher than a temperature obtained by adding a predetermined temperature X (a positive value) to the set temperature. If the temperature is higher, the compressor (6) is driven in step S3 and The fan motor (5) is driven by S4. That is, a signal is sent from the microcomputer (12) to the drive circuits (13) (14), and the relays (16) (17) are energized respectively. The compressor (6) and the fan motor (5) are now connected to the AC power supply (9) and start operation. in this case,
Since the high speed drive capacitor (19) is connected to the fan motor (5), the fan motor (5) rotates at high speed and the rapid cooling operation is performed.

On the other hand, in step S2, if the internal temperature is (the set temperature + X) or less, the process jumps to step S5, and it is determined whether the internal temperature is higher than the set temperature plus a predetermined temperature Y (positive value). . The predetermined temperature Y is naturally lower than the predetermined temperature X, and (set temperature + Y) is naturally lower than (set temperature + X). Further, if the operation of the compressor (6) and the fan motor (5) is continued in steps S3 and S4, the temperature in the freezer compartment (2) gradually decreases.
The same judgment is made in. The internal temperature is (set temperature + Y)
If it is higher than the above, the compressor (6) and the fan motor (5) are driven in steps S6 and S7, and the relay (18) is energized via the drive circuit (15) in step S8. With this, the high speed drive capacitor (19) is switched to the low speed drive capacitor (20), and the fan motor (5) is switched from the high speed rotation to the low speed rotation for the normal cooling operation. When the compressor (6) and the fan motor (5) continue to operate in this state, the temperature in the freezer compartment (2) further decreases.

Therefore, this time, it is determined in step S9 whether the internal temperature is lower than the set temperature. If the internal temperature is lower, the freezer compartment (2) is in a supercooled state, so in steps S10 and S11, the compressor (6) is
Also, the fan motor (5) is stopped, the relay (18) is deenergized through the drive circuit (15) in step (12), the capacitor is switched to the high speed drive capacitor (19) again, and the rapid cooling operation is performed. . On the other hand, when the internal temperature is equal to or higher than the set temperature, the process returns to step S6 again, steps S6 to S9 are repeated, and the normal cooling operation is performed.

In this way, the fan motor (5) is rotated at high speed when the inside temperature is considerably higher than the set temperature and rapid cooling is required, while when the inside temperature is close to the set temperature, the fan motor (5) is rotated. By rotating at a low speed, energy-saving and silent normal cooling operation can be automatically selected.

[Problems to be Solved by the Invention] In the conventional refrigerator-freezer as described above, the temperature detector (7) is installed in the freezer compartment (2) to perform the normal cooling operation or the rapid cooling operation in relation to the set temperature. Generally, the freezing room (2) has an ice making corner, a quick freezing corner,
Since it is partitioned by a shelf etc., if a heat load is applied to a section where the temperature detector (7) is not installed, the heat cannot be detected by the temperature detector (7), and rapid cooling is required. Even in this case, there is a problem that the rapid cooling operation is not started.

In order to improve this, for example, JP-A-1-3001
As shown in Japanese Patent Publication No. 77, it is conceivable to install a plurality of temperature detectors (7) in the freezer compartment (2), but the number of temperature detectors (7) increases and the cost increases. There is a problem.

The present invention has been made to solve the above-mentioned problems, and when the ice making operation requires the rapid cooling operation or when a heat load is applied to the rapid cooling corner, the rapid cooling operation can be surely performed by one temperature detector. An object of the present invention is to provide a freezer-refrigerator which has been started and can shorten the ice making time and the freezing time.

[Means for Solving the Problems] In the refrigerator-freezer according to the present invention, an ice making corner and a quick freezing corner are arranged adjacent to each other in a freezing chamber through a partition wall, and the partition wall is provided with a hole communicating with both corners. A temperature detector is arranged in the hole.

[Operation] In the present invention, a hole is provided in the partition wall between the ice-making corner and the quick-freezing corner, and the temperature detector is arranged there. Therefore, not only during ice making, but also when the heat load is put into the quick-freezing corner to perform freezing. Also, the temperature is detected and the rapid cooling operation is automatically performed.

[Embodiment] FIG. 1 is a perspective view of a freezer compartment showing an embodiment of the present invention, and the same parts as those of the conventional apparatus are designated by the same reference numerals. In addition,
4 to 6 are also used in this embodiment.

In the figure, (21) is an ice-making corner installed on the floor of the freezer compartment (2), and the ice-making tray (22) is arranged in the upper stage and the ice storage box (23) is arranged in the lower stage. Further, an ice making corner (21) and a quick freezing corner (24) into which a food to be frozen are put are juxtaposed on the floor surface of the freezing room (2), and both corners (21) (2)
4) is separated by a partition wall (25). This partition wall (25) has two corners (2) near the ice tray (22).
1) A hole (26) communicating with (24) is provided, and a temperature detector (7) is installed in this hole (26).

The control operation as described above is performed also in the refrigerator-freezer configured as described above, but the difference from the conventional device will be described.

When water is put in the ice making tray (22) and set at a predetermined position on the upper stage of the ice making corner (21), the ice making corner (21) is warmed and the temperature rises. This temperature is detected by the temperature detector (7), and the temperature inside the refrigerator and (set temperature +
The temperature is compared with the temperature of (X), and when the internal temperature is higher than this (set temperature + X), the rapid cooling operation is performed.

In this embodiment, not only the temperature of the ice-making corner (22) but also when the food with a large heat load is put in the quick-freezing corner (24), the temperature is detected and the control operation is performed.

2 and 3 are views showing another embodiment of the present invention. FIG. 2 is a perspective view of a freezer compartment, and FIG. 3 is a vertical sectional side view of an essential part of FIG.

In this embodiment, an ice making corner (21) and a quick freezing corner (24) are vertically adjacent to each other, and a temperature is provided in a hole (26) communicating with both corners (21) (24) of the partition wall (25). A detector (7) is installed, and its function is similar to that of FIG.

In each of the above examples, as the rapid cooling operation means,
Although the fan motor (5) is rotated at high speed, the fan motor (5) and the compressor (6) may be continuously operated for a certain period of time.

[Effects of the Invention] As described above, in the present invention, the temperature detector is arranged in the hole of the partition wall between the ice making corner and the quick freezing corner, so that the temperature of the water in the ice tray can be detected without increasing the temperature detector. The rapid cooling operation is performed automatically, and it is possible to manufacture at low cost and improve the usability, and the rapid cooling operation is performed by detecting the temperature of the food during ice making as well as during freezing. There is an effect that the ice making time and the freezing time can be shortened.

[Brief description of drawings]

FIG. 1 is a perspective view of a freezer compartment showing an embodiment of a refrigerator / freezer according to the present invention, FIGS. 2 and 3 are views showing another embodiment of the present invention, and FIG. 2 is a perspective view of the freezer compartment. , Fig. 3 is the second
FIG. 4 is a vertical side view of a main part of the figure, FIGS. 4 to 6 are views showing a conventional refrigerator-freezer, FIG. 4 is a vertical side view, and FIG. 5 is a circuit diagram.
FIG. 6 is a flowchart showing the operation. In the figure, (1) is a refrigerator main body, (2) is a freezer, (4) is a cooler, (5) is a fan motor, (6) is a compressor,
(7) is a temperature detector, (8) is a control unit, (12) is a microcomputer, (19) is a high-speed drive capacitor, (2)
(0) is a low speed drive capacitor, (21) is an ice making corner, (2)
2) is an ice tray, (24) is a quick-freezing corner, (25) is a partition wall, and (26) is a hole. The same reference numerals in the drawings indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Shou 62-1092 (JP, U) Seki 56-56595 (JP, U)

Claims (1)

[Claims] 1. An ice making corner (21) for accommodating an ice making tray (22) in a freezing compartment (2) and a quick freezing corner (21) adjacent to the ice making corner (21) via a partition wall (25). 24) and a temperature detector (7) in the freezer compartment (2), and the normal cooling operation or the rapid cooling operation having a larger cooling capacity than this is performed by the output of the temperature detector (7). In the cold-air forced circulation type refrigerator-freezer, a hole (26) is provided in the partition wall (25) to connect the ice making corner (21) and the quick freezing corner (24), and the temperature detection is made in the hole (26). A freezer-refrigerator, characterized in that a container (7) is arranged.