JPH0355481A - Damper device for refrigerator - Google Patents

Abstract

PURPOSE:To shut OFF influence of atmospheric temperature to a temperature setting second heat sensor and to accurately control a heater by coupling a refrigerator temperature sensing first heat sensor to the second heat sensor, adding a heater to a heat sensing cylinder in the second sensor, and providing heat insulator layers on the outer parts of them. CONSTITUTION:A cold air port 32a formed at a partition wall 32 between a freezing chamber 30 and a cold storage chamber 31 is opened or closed by a damper plate 33 moving by the operation of bellows 37, a refrigerator temperature sensing first heat sensor A and a temperature setting second heat sensor B are coupled through communicating tube 39 to the bellows 37, a heater 42 is added to a temperature sensing cylinder 41 in the second sensor, heat insulator layers 49 are provided on the outer parts of them to shut OFF the influence of the environmental temperature to the heater, it is not affected by the atmospheric temperature, the opening closing temperature of the damper can be accurately set, and the installing place of the second sensor can be freely selected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a damper device used to open and close a cold air outlet provided between a freezing compartment and a refrigerating compartment of a refrigerator.

[Conventional technology]

For example, the one shown in Utility Model Publication No. 1-13985 is publicly known, and its structure is as shown in FIG.

This device consists of a freezer compartment 2 and a refrigerator compartment 3 which are separated from each other by a partition wall 1 made of a heat insulating material, a cold air outlet 4 formed in the partition wall 1, and a damper plate 5 for the cold air outlet 4.
, a container frame 7 in the damper operating mechanism 6, an actuating plate 8 whose base end is rotatably attached to the container frame 7 by a support shaft 9 and the damper plate 5 is attached to the tip end, and the device frame 7 A bellows 10 provided opposite to one side of the actuating plate 8 and filled with fluid; a protruding piece 1 at the lower end of the actuating plate 8;
The bellows 10 is connected to a first heat sensitive part 21 for sensing the temperature in the refrigerator room and a second heat sensitive part 22 for setting the temperature in sequence. There is.

That is, the first heat-sensitive section 2l is connected to the bellows 10 via the communicating tube 1l, and the second heat-sensitive section 22 is connected to the first heat-sensitive section 2l via the communicating tube 23. Then, the first heat-sensitive section 21 is arranged at a predetermined position in the refrigerator compartment 3, and the second heat-sensor section 22 is arranged outside the refrigerator compartment 3, and the heater 24 is wound around the second heat-sensor section 22. A power source 27 is connected to the heater 24 via a variable resistor 26 provided outside the door 25.

In this structure, the first heat sensitive part 21 senses the temperature change in the refrigerator compartment 3, changes the internal pressure of the bellows 10, moves the damper plate 5 forward and backward relative to the cold air opening 4, and cools the refrigerator. To maintain the temperature of the compartment 3 constant and set the temperature of the refrigerator compartment 3, operate the variable resistor 26 to turn on the heater 24.
The internal pressure of the bellows 10 is changed by increasing or decreasing the amount of heat generated by the bellows 10 and adjusting the amount of heat applied to the second heat-sensitive section 22.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, since the second heat-sensitive section 22 is installed outside the refrigerator, it is affected by the outside temperature, and the temperature change range varies between summer and winter. The wide area makes accurate heater control impossible and impractical.

The present invention has been made with attention to the above-mentioned points, and is intended to apply highly accurate heater control to a second heat-sensitive section installed outside the refrigerator while blocking the influence of outside temperature. It is something.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a device that opens and closes the cold air vents formed in the partition walls of the freezer and refrigerator compartments using a damper plate that moves based on the movement of the bellows, and communicates with the bellows. A first heat-sensing section for temperature sensing of the refrigerator and a second heat-sensing section for temperature setting are connected via a tube, and a heater is attached to the temperature-sensing tube in the second heat-sensing section, and a heat insulating material is provided outside of these. A structure was adopted in which a layer was provided to block the influence of ambient temperature on the temperature-sensitive cylinder.

〔Example〕

In FIG. 1, a partition wall 32 between a freezer compartment 30 and a refrigerator compartment 31 is shown.
A cold air outlet 32a is formed at the front, and a damper plate 33 for opening/closing approaches and separates. The damper actuator side 34 is the same as the conventional example, and consists of a container frame 35, an actuating plate 36, a bellows 37 as a pressure responsive member, and an adjustment spring 38. The bellows 37 is connected to the first heat sensitive part A via the communication pipe 39.
temperature-sensitive cylinder 40 as a second heat-sensitive part B and temperature-sensitive cylinder 4 as a second heat-sensitive part B
Connect l in sequence. The first thermosensor 40 is for detecting the temperature of the refrigerator compartment and is installed inside the refrigerator compartment 3l, and the second thermosensor 41
is for temperature setting and is installed outside the refrigerator. A heater 42 and a thermistor 43 are attached to the second temperature-sensitive tube 4l, and the heater 42 is connected to a control device 45 controlled by the CPU via a temperature setting variable resistor 44, and the thermistor 43 is also connected to the control device 45 controlled by the CPU. It is connected together with the internal thermostat 46 to a control device 45 controlled by the CPU, and the temperature difference between the internal thermistor 46 and the external thermistor 43 is processed by the control device 45 controlled by the CPU. 44 controls the heater 42 to vary the damper opening/closing temperature.

FIG. 2 shows details of the second heat-sensitive part, in which a recess 41a is formed in the longitudinal direction on one side of the outer periphery of the temperature-sensing tube 4l, and a rod-shaped heater 42 is adhered to the cough recess 41a with a connecting agent 47. Further, a thermistor 43 is bonded to the temperature sensitive tube 41 on the side opposite to the heater 42 with an adhesive 47, and the heat 42 and thermistor 43 are fixed by a series of holders 48. A heat insulating material layer 49 is provided on the outer periphery of the temperature sensing cylinder 4l equipped with a heater 42 and a thermistor 43 to block the influence of ambient temperature on the temperature sensing cylinder etc., and a heat resistant joint resin sheet 50 and a heat resistant resin sheet 50 are provided. It is covered in a cylindrical shape with a rubber foil 51, and a focusing band 5 is attached at both ends along with a heat-resistant tape 52.
Bind by 3. In addition, 54 is a screw band for fixing the second heat sensitive part, 42a is a lead wire of the heater 42, and 43
A is a lead wire of the servo star 43.

〔Effect of the invention〕

As described above, the present invention provides a system I in which the cold air vents formed in the partition walls of the freezer compartment and the refrigerator compartment are opened and closed by a damper plate that moves based on the movement of the bellows, and the refrigerator temperature is A first heat sensitive part for sensing and a second heat sensitive part for temperature setting are connected, a heater is attached to a temperature sensitive tube in the second heat sensitive part, and a heat insulating material layer is provided on the outside of these parts. Since it blocks the influence of ambient temperature on the hot cylinder, when controlling the heater of the second heat sensitive part, it is possible to accurately set the opening and closing temperature of the damper without being affected by the outside temperature. You can freely choose the installation location of the second heat-sensitive part.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the present invention, FIG. 2 is a sectional view of the second heat-sensitive section, and FIG. 3 is a sectional view of a conventional example. 30... Freezer room, 3l... Refrigerator room, 32... Partition wall, 32a... Cold air outlet, 33... Dambar plate, 37... Bellows, A... First heat sensitive part , B...
・Second thermosensitive section, 41...Second thermosensitive tube, 42...
Heater, 43, 46... Sermo star, 45... Control device. Figure 1

Claims (2)

[Claims] (1) A device that opens and closes the cold air vents formed in the partition walls of the freezer compartment and the refrigerator compartment using a damper plate that moves based on the movement of the bellows, and connects the bellows with a first pipe for sensing the temperature of the refrigerator through a communicating pipe. The heat sensing section is connected to a second heat sensing section for temperature setting, and a heater is attached to the temperature sensing tube in the second heat sensing section, and a heat insulating material layer is provided on the outside of these to control the ambient temperature for the temperature sensing tube. A damper device for refrigerators that blocks the influence. (2) A damper device for a refrigerator according to claim 1, wherein a thermistor is attached to the temperature-sensitive cylinder and connected to a control device together with the thermistor arranged in the refrigerator compartment.