JPH0416156Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a refrigerator in which the temperature of the refrigerator compartment is controlled by a thermostat.

BACKGROUND ART FIGS. 3, 4, and 5 show conventional refrigerator-freezers. In FIG. 3, 1 is a refrigerator body, 2 is a freezer compartment, 3 is a refrigerator compartment, and 4 is a cooler disposed between the freezer compartment 2 and the refrigerator compartment 3. Reference numeral 5 denotes a blower that forcibly blows cold air produced by the cooler 4 to the freezer compartment 2 and the refrigerator compartment 3. Reference numeral 6 denotes an air path that guides cold air discharged from the blower 5 to the freezer compartment 2 and the refrigerator compartment 3. 7 is a damper that manually adjusts the amount of cold air that has passed through the air passage 6. By allowing the damper to close freely, more cold air is discharged into the freezer compartment 2, and the cold air that has undergone heat exchange inside the refrigerator is , it passes through the suction port 8 and returns to the cooler 4 again, becoming new cold air. 9 detects the temperature of the refrigerator compartment 3 and turns on the compressor 1.
This is a control box that houses a thermostat 11 that controls the operation of 0. Figure 4 shows
3 is a detailed view of the main parts inside the control box 9. FIG.
12 is a thermo sensitive part. Capillary reach tube, 13 is a thermo-heater that generates heat when the thermostat 11 is OFF, 14 is the thermostat 11
It is a body heater that generates heat when energized, and the thermo-heater 13 connects the capillary reach tube 12,
In addition, the body heater 14 is a thermodiaphragm portion 1
Loosen 5 each. 15' is a vinyl chloride tube that houses the heater, and 15'' is a banding tube that fixes both heaters.

FIG. 5 is an electrical circuit diagram of the conventional refrigerator-freezer.

The thermo-heater 13 and the body heater 14 are connected in series, and further connected in parallel with the thermostat 11. Therefore, both of the heaters are energized when the thermostat 11 is OFF. 16 is an integration timer that adds up the operating time of the compressor, 17 is a cooler 4
This heater defrosts the frost that has adhered to the surface, and is turned on after the integration timer 16 has integrated the predetermined time. 18 is a defrosting end detection device, and 19 is a heating prevention device for the defrosting heater 17.

Problems to be Solved by the Invention However, the above configuration has the problem of requiring two types of heaters, a thermo-heater and a body heater, which increases the number of parts and the number of man-hours during assembly.

In view of the above problems, the present invention provides a reduction in the number of parts and the number of man-hours during assembly.

Means for Solving the Problems In order to solve the above problems, the refrigerator of the present invention bends the thermocapillary reach tube into a loop shape, and connects one end of the fixed resistor that generates heat when the thermostat is turned off to the thermodiaphragm part. It has a structure in which it is disposed within a capillary reach tube whose end is bent into a loop shape.

Function The present invention uses the above-mentioned configuration to operate a thermostat.
When OFF, the heat generated by the fixed resistor warms the thermodiaphragm and thermocapillary reach tube.

Embodiment A refrigerator according to an embodiment of the present invention will be described below with reference to the drawings. Note that parts that are the same as those in the conventional example are given the same numbers and explanations are omitted, and only the different points will be explained.

FIG. 1 is a detailed view of the main parts inside a control box of a refrigerator in an embodiment of the present invention. In the figure, 20 is a thermocapillary reach tube bent into a loop shape, 21 is a fixed resistor, and 22 is a vinyl chloride tube for contracting the fixed resistor 21. 23 is a banding tube for bringing one end 24 of the fixed resistor 21 into pressure contact with the thermodiaphragm portion 25. The other end 26 of the vinyl chloride tube is inserted into the loop-shaped thermocapillary reach tube 20. 27 is a lead wire of the fixed resistor 21.

FIG. 2 is an electrical circuit diagram of the embodiment of the present invention.

The operation of the refrigerator configured as described above will be described below with reference to FIGS. 1 and 2.

According to the electrical circuit diagram in Figure 2, thermostat 1
When 1ON, that is, during cooling operation, the fixed resistor 21 is not energized, and the operation is the same as that of a conventional electric circuit diagram. When the cooling operation progresses and the temperature of the refrigerator compartment reaches a predetermined temperature, the thermostat 11 senses the temperature and opens an internal contact. Then, the fixed resistor 21 is energized and starts generating heat. The heat generated by the fixed resistor 21 warms the thermocapillary reach tube 20 and the thermodiaphragm section 25. Here, the fixed resistor 21
Since the one end portion 24 is pressed against the thermodiaphragm portion 25 by the banding tube 23, the temperature rise in the thermodiaphragm portion 25 is greater than that in the thermocapillary reach tube 20. Therefore, the temperature at which the contacts in thermostat 11 close again is the temperature at which the contacts in thermostat 11 close again.
, and is not determined by the temperature of the thermodiaphragm section 25. In other words, the phenomenon of thermobody detection does not occur.

Note that when the temperature rise of the thermocapillary reach tube 20 is slow, the heat generated by the fixed resistor 21 can be effectively utilized by wrapping an aluminum foil tape around the surface of the vinyl chloride tube 22.

As described above, according to this embodiment, the capillary reach tube of the thermostat is bent into a loop shape, one end of the fixed resistor is inserted into the loop shape of the capillary reach tube, and the other end is pressed into contact with the diaphragm portion of the thermostat. By doing so, the number of parts and the number of man-hours during assembly can be reduced.

Effects of the invention As described above, the present invention consists of a thermostat that senses the temperature of the refrigerator compartment and controls the operation of the compressor, and a fixed resistor that generates heat when the thermostat is turned off. The tube is bent into a loop shape, one end of the fixed resistor is inserted into the loop shape of the capillary reach tube, and the other end is pressed into contact with the diaphragm of the thermostat. There is no need for two types of heaters, and excellent effects such as a reduction in the number of parts and a reduction in the number of man-hours during assembly can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the inside of a control box of a refrigerator according to an embodiment of the present invention, and Fig.
3 is a sectional view of a conventional refrigerator, FIG. 4 is a detailed view of the main parts inside the control box, and FIG. 5 is an electric circuit diagram of the same. 11...Thermostat, 20...Thermocapillary reach tube, 21...Fixed resistance.

Claims (1)

[Scope of utility model registration request] A thermostat that senses the temperature of the refrigerator compartment and controls the operation of the compressor, and a thermostat that controls the operation of the compressor.
The capillary reach tube of the thermostat is bent into a loop shape, one end of the fixed resistor is inserted into the loop shape of the capillary reach tube, and the other end is press-fitted to the diaphragm portion of the thermostat. A refrigerator that features: