JPS6284281A - Freezing refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a refrigerator-freezer that is of a forced draft type and is equipped with a freezer compartment, a refrigerator compartment, and a third compartment that enables temperature switching, and particularly relates to defrost control thereof. Related.

Prior Art A conventional example will be explained with reference to FIGS. 4, 5, and 6. FIG. 4 is a sectional view of a conventional refrigerator-freezer.

1 is the box body of the refrigerator. 6 is a partition wall that separates the freezing chamber 2 and the switching chamber 3. 6 is a second partition wall that switches between the switching chamber 3 and the refrigerator compartment 4. 7 passes the cold air cooled by the cooler 8 through the freezer compartments 2 and 10, respectively. Switching room 3. This is a blower that blows air into the refrigerator compartment 4. 12 is a thermostat which senses the temperature of the freezer compartment 2 and turns the compressor 13 ON-OFF.

14 is a damper thermostat that senses the temperature of the switching chamber 3 and controls the amount of cold air, and is connected to a lever 16, so that the temperature can be switched by operating the lever 16. 16 is a damper thermostat that senses the temperature of the refrigerator compartment 4 and controls the amount of cold air flowing into the refrigerator compartment 4.

Next, FIG. 6 is an enlarged view of the operating section attached to the top surface of the switching chamber 30.

The damper thermostat in FIG. 3 is 14.

17 is the shaft of the damper thermostat 14;
By rotating it, the temperature of the switching chamber 3 can be changed. 15
is a lever supported by a fulcrum 18, which causes the operating knob 19 and shaft 17 to interlock.

Next, FIG. 6 is an electrical circuit diagram. 20 is a defrost timer that integrates the operating time of the compressor 13 and switches the defrost circuit to the normal cooling operation circuit, and 21 is the timer motor. 22 is a switch for the timer motor 21, and by switching contacts 23 and 24, the circuit is switched to a normal cooling operation circuit and a defrost circuit, respectively. 26 is a bimetallic switch attached to the cooler 8, which detects the end of 70 strokes due to the temperature rise during defrosting and ends the defrosting. 26 is a defrost heater.

The operation of the above configuration will be explained below. When the temperature of the freezer compartment 2 is higher than a predetermined temperature, the stator 12 is closed and the compressor 13. The blower 7 is operated. Therefore, the cold air cooled by the cooler passes through the duct 9 to the freezer compartment 2,
Also, the cold air passes through the duct 10, is controlled by the damper thermostat 14, and flows into the switching chamber 3, and then the duct 11 is energized.
The cold air is controlled by a damper thermostat 16 and sent to each of the refrigerator compartments 4, and the temperature of each compartment is controlled independently.

The temperature of the switching chamber 3 can be changed by operating the operating knob 19 left or right (as shown from the solid line position to the two-dot chain line position in Fig. 6).When the operating knob 19 is turned to the left, the flap of the damper thermostat is activated. Because it is forcibly opened, it reaches the temperature of the freezer compartment. If you move it to the left, you can switch to the refrigeration temperature or the third temperature zone.

In addition, regarding the third temperature range, fish meat has recently been introduced.

It is often kept at a temperature of 0 to -3°C, which is considered effective for preserving livestock meat.

Regarding defrost control, the operating time of the compressor 13 is accumulated by the defrost timer 20, and when a certain period of time is accumulated, the switch 23 is switched to the contact 24 side, the defrost heater 26 is energized, and the cooler 8 is set to an appropriate temperature. When the temperature rises to , the bimetal switch 26 turns OFF and the defrost process ends. Then, the switch 22 is switched to the contact 23 and the normal cooling operation is started.

Problems to be Solved by the Invention However, in such a configuration, the switching chamber 3 is set to the freezing chamber temperature,
When switching the temperature of the refrigerator compartment to the third temperature zone, the amount of frost formed on the cooler 8 increases as the temperature of the switching compartment 3 increases, as the amount of evaporation from the food increases. This was inappropriate defrost control because it became long because the time became low.

The present invention solves the above-mentioned conventional problems, and provides a refrigerator-freezer equipped with defrost control that corresponds to the amount of frost that changes depending on the temperature of the switching chamber.

Means for Solving the Problems In order to solve the above problems, the refrigerator-freezer of the present invention includes a circuit that integrates the operation time of the compressor and performs defrosting at regular intervals, and a switching chamber that is connected to the freezing temperature, refrigeration temperature, and means for changing the defrost cycle when switching to the third temperature zone.

Function The present invention changes the defrost period in accordance with the amount of frost when the temperature of the switching chamber is changed using the above-described configuration.

EXAMPLE A refrigerator-freezer according to an example of the present invention will be described below with reference to FIGS. 1, 2, and 3.

FIG. 1 is a sectional view of a refrigerator-freezer according to an embodiment of the present invention, but since it is the same as the conventional example, the explanation will be omitted.

FIG. 2 is an enlarged view of the operating section of the switching chamber 3, and shows the angle between 14° and 16°.
1, 18, and 19 are the same as in the conventional example, and will be explained using the same numbers. 28 is a microswitch, which is turned on when the lever 15 is turned all the way to the left.

FIG. 3 is an electrical circuit diagram, and points 12, 22, and 25 degrees 26 are the same as in the conventional example. 27 is a second timer motor. Reference numeral 29 is a power relay which is interlocked with the micro switch 28, and by opening and closing the switch 30.31, the timer motor 22.27 which totals the operating time of the compressor 13 is switched.

The operation of the refrigerator-freezer configured as above will be explained below. The micro switch 28 is linked to the lever 15 of the switching chamber 3, and turns on when it is swung all the way to the left.
The switching chamber becomes the freezer room temperature, and if you move it to the right, it changes to 0FFL.
Refrigerator room temperature switches to third temperature zone.

At this time, power relay 2 linked to micro switch 28
9 is the timer motor 22 (micro switch OFF
) forms a circuit that integrates the operating time of the compressor using either of the second timer motors 27 (microswitch ON). Here, the timer motor has a different cumulative time, such as 8 hours for 22 and 12 hours for 27, that is, a short cumulative time for the temperature of the refrigerator room and the third temperature zone.

As described above, according to this embodiment, the switching chamber temperature is the refrigerator chamber temperature,
When switching from the third temperature range to the freezer temperature, the timer motor changes to one with a long integration time.

That is, the defrost cycle does not change in response to the amount of frost that changes depending on the temperature of the switching chamber, and efficient and reliable defrost control can be performed.

Effects of the Invention As described above, the present invention includes a circuit that integrates the operating time of the compressor and performs defrost at regular intervals, and when the switching chamber is switched to freezing temperature, refrigeration temperature, and a third temperature zone, the defrost cycle is adjusted. By changing the defrost cycle in response to the amount of frost that changes with the temperature change in the switching chamber, efficient and reliable defrost control can be performed.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a refrigerator showing one embodiment of the present invention;
The figure is an enlarged perspective view of the switching room operation section, Figure 3 is an electric circuit diagram,
FIG. 4 is a sectional view of a conventional refrigerator, FIG. 5 is an enlarged perspective view of a switching chamber operating section, and FIG. 6 is an electric circuit diagram. 2... Freezer room, 4... Refrigerator room, 3...
...Third chamber, 7...Blower, 9,10.
11...Duct, 22゜27...Timer motor, 28...Micro inch, 2
9...Power relay. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] a freezing compartment, a refrigerating compartment, and a third compartment whose temperature is independently controlled from the freezing compartment and the refrigerating compartment, and which allows switching between the freezing compartment temperature, the refrigerator compartment temperature, or a third temperature zone; a duct and a blower for blowing air cooled by the cooler to the freezer compartment, the refrigerator compartment, and the third compartment; a circuit that integrates the operating time of the compressor and performs defrosting at regular intervals;
A refrigerator-freezer comprising a control means for changing a defrost cycle when the third chamber is switched between a freezer room temperature, a refrigerator room temperature, and a third temperature zone.