JPH063035A - Door apparatus for freezer/refrigerator - Google Patents

Abstract

PURPOSE:To obtain a door apparatus which enables the prevention of dew formation and an excessive temperature rise on the surface of a partition body by allowing the keeping the surface temperature of the partition body at a proper temperature even when it is employed for a refrigerating chamber or the like with a low internal temperature concerning the door apparatus for the freezer/refrigerator. CONSTITUTION:This apparatus is made up of an outside air temperature detection means 30 to detect an outside air temperature, a partition body surface temperature detection means 31 to detect the surface temperature of a partition body, a control means 32 comprising a microcomputer or the like to fetch input signals from the outside temperature detection means 30 and the partition body temperature detection means 31, a drive means 27 which works by an output signal from the control means 32 and a sweating prevention heater 13 to be operated by the drive means 27. The temperature of the partition body is controlled to equal the outside air temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator door device in which an opening of a heat-insulating box is opened and closed by a double-door type door and a back gasket is provided with a sealing gasket.

[0002]

2. Description of the Related Art A conventional door device of this type is, for example, NR-F40VP1 released by Matsushita Cold Machinery Co., Ltd. in March 1990.
There was one that was adopted for the type refrigerator / freezer. The mechanical structure will be described below with reference to FIGS.

Reference numeral 1 is a refrigerator-freezer body, 2 is an outer box made of an iron plate, and 3 is an inner box formed by molding synthetic resin. Reference numeral 4 denotes a foam insulation material filled between the outer box 2 and the inner box 3,
The inner box 3 and the foam heat insulating material 4 form a heat insulating box 5 having an opening at the front. Reference numerals 6A and 6B denote two double-door double doors that are rotatably attached by upper and lower hinges 7A and 7B provided above and below the left and right edges of the heat insulating box 5. 8 is the door 6
The guide portions are located on the non-attachment sides of A and 6B and are installed to face each other above and below the edge of the opening 5A of the heat insulating box 5. The front surface of the guide portion 8 is planar and is flush with the opening 5A. 8A is a protrusion of the guide portion, 9
Is a partition. Reference numeral 10 is a molded product made of synthetic resin having a semicircular groove forming the partition body 9. Partition 9
Is the back cover 11 that constitutes the back surface as shown in FIG.
Have. Reference numeral 12 is a front decorative plate of the partition 9, reference numeral 13 is a perspiration preventing heater, and reference numeral 14 is a heat insulating material. Reference numeral 15 is a heat dissipation pipe for preventing sweating provided inside the edge of the opening 5A, and 16 is a decorative plate forming the edge of the opening 5A. Reference numeral 17 is a frame body that constitutes the edge of the opening 5A. 18 is a heat insulating material. 19
Is a gasket attached to the back edge of the doors 6A and 6B,
Reference numeral 20 is a refrigerating compartment inside, and 21 is a support arm projecting toward the inside 20 of the refrigerating compartment inside the refrigerating compartment inside the back side of the door 6A. 7, FIG. 8 and FIG. 9, reference numeral 22 denotes an inside of the freezer compartment, and 23 is an inside temperature detecting means including a thermistor or the like for detecting the temperature inside the freezer compartment 22 and sending an operation control signal of the compressor 24.

The operation of the door device of the refrigerator constructed as described above will be described below. When the door 6A is closed, the partition body 9 enters the inside 20 of the compartment, and the projection 8A of the guide portion 8 and the semicircular groove of the molded product 10 come into contact with each other to rotate. When the partition body 9 is aligned with the semicircular groove of the molded product 10, the partition body 9
The front surface is flush with the opening 5A of the heat insulating box body 5, and the gaskets 19 on the non-pivotal side of both doors abut on the front surface of the partition body 9 to keep the inside of the cabinet airtight.

Next, the control circuit will be described. Reference numeral 25 is a control means composed of a microcomputer or the like, to which the in-compartment temperature detection means 23 is connected as an input. As outputs, drive means 26 for moving the compressor 24 and drive means 27 for energizing the perspiration prevention heater 13 are connected.

The operation of the above arrangement will be described with reference to FIG. In step 1, the data input from the internal temperature detection means 23 is compared with preset temperature data. When it is determined that the data input in step 1 is high, the process proceeds to step 2 and the control means 25 outputs the data to the drive means 26 to turn on the compressor 24. Further, the process proceeds to step 3, the controller 25 outputs the current to the drive device 27 to energize the perspiration prevention heater 13, and the process returns to step 1. When it is determined that the data input in step 1 is low, the process proceeds to step 4 and the control means 25 for turning off the compressor 24.
Output to the drive means 27, further proceed to step 5, output from the control means 25 to the drive means 27 to stop energization of the perspiration prevention heater 13, and return to step 1.

[0007]

However, if the above-mentioned conventional technique is applied to a freezing room or the like having a low inside temperature, the difference between the outside air temperature and the inside temperature is large. It has a drawback that it is difficult to maintain an appropriate temperature on the front surface of the partition body and dew condensation occurs on the front surface of the partition body. In addition, the temperature of the front surface of the partition body is too multifaceted, and there is a possibility that the human body may be damaged by burns or the like when touched by the human body.

The present invention solves the above conventional problems and provides a door device for a refrigerator / freezer which prevents dew condensation on the front surface of the partition and excessive temperature rise.

[0009]

In order to solve the above-mentioned problems, a door device of a refrigerator according to the present invention comprises a heat-insulating box body having an opening, and a double-door type open and rotatably supported on both sides of the opening. The first and second doors, the gaskets provided on the peripheral edges of the back surfaces of both doors, and the opening edge portions located on the non-supporting side of the both doors are installed, and the front surface is flat and flush with the opening. A guide portion having a protrusion or a groove, and the first
The door extends in the rotation axis direction of the door at a length substantially extending to the opening edge of the back surface of the non-supporting side portion and is rotatably supported, and enters into the refrigerator with the closing operation of the first door. A partition body having a groove or a projection that comes into contact with the guide portion and rotates to slidably match the guide portion; a heating element on the partition body; and a partition body temperature detecting means for detecting the temperature of the partition body. It has a built-in outside air temperature detection means for detecting the outside air temperature, and operates the heating element while comparing the temperature of the partition body detected by the partition body temperature detection means with the outside air temperature detected by the outside air temperature detection means. And a control circuit that operates.

[0010]

According to the present invention, since the outside air temperature detecting means is arranged and the partition body temperature detecting means is built in the partition body, the present invention makes it possible to compare the temperature of the front surface of the partition body with the outside air temperature. When the temperature of the front of the partition reaches the outside air temperature or higher, the power supply to the heating element is stopped, so the temperature of the front of the partition can always be controlled near the outside air temperature, and the condensation on the front of the partition and the excessive temperature rise can be prevented. Is.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. It should be noted that the same parts as those of the related art are denoted by the same reference numerals and detailed description thereof will be omitted.

Since the mechanical structure of the outer ring and the partition of the refrigerator is the same as that of the prior art, FIGS. 5 to 8 will be shared in the description of this embodiment.

Reference numeral 1 is a refrigerator-freezer body, 2 is an outer box made of an iron plate, and 3 is an inner box made of synthetic resin. Reference numeral 4 denotes a foamed heat insulating material with which the outer box 2 and the inner box 3 are filled, and forms a heat insulating box body 5 having an opening on the front surface. 28A and 28B are upper and lower hinges 7A and 7B provided above and below the left and right edges of the heat insulating box 5.
It is a double-door type double door that is attached to rotate freely. Reference numeral 8 is a guide portion which is located on the non-attachment side of each of the doors 28A and 28B and which is installed above and below the edge portion of the opening 5A of the heat insulating box 5 so as to face each other. The front surface of the guide portion 8 is planar and is flush with the opening 5A. 8A is a projection of the guide portion, and 29 is a partition. 10 is a partition 29
Reference numeral 11 is a molded product made of a synthetic resin having a semicircular groove that constitutes the above, and 11 is a back cover that constitutes the back surface of the partition 29. Reference numeral 12 is a front decorative plate of the partition body 29, 13 is a perspiration preventing heater, and 14 is a heat insulating material.

Reference numeral 31 shown in FIG. 3 is a partition body temperature detecting means, which is arranged inside the partition body 29 and near the perspiration prevention heater 13.

Reference numeral 15 is a perspiration-preventing heat radiation pipe provided inside the edge portion of the opening 5A, and 16 is a decorative plate forming the edge portion of the opening 5A. Reference numeral 17 is a frame body that constitutes the edge of the opening 5A. 18 is a heat insulating material. 19 is a door 28A, 28B
The gasket 20 attached to the peripheral portion of the back surface of the inside is in the refrigerator compartment, but it may be a refrigerator-freezer. Reference numeral 21 denotes a support arm projecting toward the inside 20 of the refrigerating chamber in the upper and lower two places at a portion of the back surface of the door 28A which is not attached. Reference numeral 30 is an outside air temperature detecting means built in the door 28A.

Next, the operation of the control circuit will be described. 32
Is a control means composed of a microcomputer or the like, and has a partition body temperature detection means 31 capable of detecting the front temperature of the partition body 29 and an outside air temperature detection means 30 capable of detecting the outside air temperature as inputs.
Are connected. Drive means 27 for energizing the perspiration prevention heater 13 as an output is connected.

The operation of the above arrangement will be described with reference to FIG. In step 6, the front surface temperature data of the partition body 29 input by the partition body temperature detection means 31 and the outside air temperature data input by the outside air temperature detection means 30 are compared to determine that the front surface temperature of the partition body 29 is less than the outside air temperature. If judged, the control means 3 proceeds to step 7 to energize the perspiration prevention heater 13.
The data is output to the driving means 27 from No. 2 and returns to Step 6. When it is determined in step 6 that the front surface temperature of the partition 29 is equal to or higher than the outside air temperature, the control means 32 outputs to the driving means 27 to stop energization of the perspiration prevention heater 13 in step 8, and the procedure returns to step 6.

As described above, according to this embodiment, since the outside air temperature detecting means 30 is provided and the partition body temperature detecting means 31 is built in the partition body 29, it is possible to compare the temperature of the front surface of the partition body 29 with the outside air temperature, and When the temperature of the front surface of the body 29 is equal to or higher than the outside air temperature, it is possible to stop the energization of the perspiration prevention heater 13, and by keeping the front surface temperature of the partition body 29 always near the outside air temperature, the dew condensation on the front surface of the partition body 29 is achieved. The temperature can be prevented and the temperature can be suppressed so as not to be damaged even if the human body touches it.

In this embodiment, the outside air temperature detecting means 30 is built in the door 28A. This configuration is capable of accurately detecting the air temperature near the partition and is a preferable configuration.

However, the outside air temperature detecting means 30 does not necessarily have to be inside the door as long as it can accurately detect the outside air temperature. For example, the front surface of the door, the side surface of the main body, the ceiling surface, the bottom portion, etc. I don't mind.

[0021]

As is apparent from the above embodiments, according to the present invention, when the front surface temperature of the partition body exceeds the outside air temperature, the energization of the perspiration preventing heater is stopped, so that the front surface temperature of the partition body is always set to the outside air temperature. Since it is possible to maintain the same temperature, it is possible to prevent dew condensation on the front surface of the partition body, and it is possible to keep the temperature at which the human body is not damaged even if it is touched.

[Brief description of drawings]

FIG. 1 is a block diagram of a control circuit showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a refrigerator-freezer according to an embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view of a main part of the door device of the refrigerator / freezer.

FIG. 4 is a flowchart showing an embodiment of the present invention.

FIG. 5 is a perspective view of a conventional refrigerator-freezer.

FIG. 6 is a front view of a heat insulating box of the refrigerator-freezer.

FIG. 7 is a cross-sectional plan view of the refrigerator with the door opened.

FIG. 8 is a plan sectional view of the refrigerator with the door closed.

FIG. 9 is a sectional view of the main part of the refrigerator-freezer.

FIG. 10 is an enlarged sectional view of a main part of the door device of the refrigerator / freezer.

FIG. 11 is a block diagram of a control circuit showing a conventional example.

FIG. 12 is a flowchart showing a conventional example.

[Explanation of Codes] 1 Refrigerator / refrigerator main body 5 Insulating box body 5A Insulating box body opening 8 Guide part 8A Guide part protrusion 13 Perspiration prevention heater 28A, 28B Door 29 Partition body 30 Outside air temperature detecting means 31 Partition body temperature detecting means 32 Control means

Claims (1)

[Claims] 1. A first and second gannon-opening type door rotatably supported on both sides of the opening so as to close the opening of an insulating box having an opening, and the doors are provided at the peripheral edges of the back surfaces of both doors. And a gasket that abuts against the opening edge, and a first door that is rotatably supported by extending in the rotational axis direction of the door with a length that extends across the opening edge on the back surface of the non-pivotal side portion of the first door. With the closing motion of the door, it comes into contact with the projection of the guide portion formed on the opening edge portion located on the non-pivotal side of the both doors and rotates to slide on the projection of the guide portion. It comprises a partition body having a groove that movably matches, the partition body has a built-in partition body temperature detection means for detecting the temperature of the partition body, and an outside air temperature detection means for detecting the outside air temperature. When the temperature of the outside air detected by the partition temperature detecting means or higher is reached, the power supply to the heating element is stopped. Door apparatus refrigerator, characterized in that it comprises a control circuit for.