JPH0221750Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a defrosting water transfer device used in refrigerators, show cases, etc.

Configuration of conventional example and its problems FIG. 1 shows a conventional defrosting water transfer device.
The configuration of this conventional example will be explained below with reference to FIG. 1.

In the figure, reference numeral 1 denotes a refrigerator main body, and a compressor 2 and a condenser 3 are provided on the outer upper part of the main body, and a freezing compartment 4 is formed in the main body below it, and a refrigerating compartment 5 is formed below it, respectively. 6 is the outer box. 7 is an inner box made of synthetic resin, which contains the freezer compartment 4 and the refrigerator compartment 5.
It forms two chambers of the same body. 8 is the outer box 6
This is a foamed heat insulating material filled between the inner box 7 and the inner box 7. Reference numeral 9 denotes an upper cover provided on the outer upper part of the refrigerator main body 1 and having an open top surface, which surrounds the compressor 2 and the condenser 3. 10 is an upper door that closes the freezer compartment 4;
Reference numeral 1 denotes a lower door that closes the refrigerator compartment 5. Reference numeral 12 denotes an evaporating dish, which is placed on the condenser 3. 13
is a water pump. Reference numeral 14 denotes a cooler, and a pipe 15 is provided below the cooler, penetrating the partition wall 16. A tank 17 is provided in the upper part of the refrigerator compartment 5 at a position facing the lower end of the pipe 15, and stores defrosting water discharged when the cooler 14 is periodically defrosted. 18 is a suction tube that passes through the foam insulation material and connects the water pump and the tank 17. 19 is a drainage tube, one end of which is inserted into the evaporating dish 12. The water pump 13 operates after a certain period of time after the cooler 14 is defrosted, and continues to operate for a certain period of time after the defrosting is completed.

However, in the above conventional example, the water pump 13 did not operate until a certain period of time had passed after defrosting started, so a relatively large tank 17 was provided to store the defrosting water during that time. The need arose. Also, start defrosting and pump 1
3 is activated, the defrosting heater (not shown) raises the ambient temperature around the cooler 14, and the warm air raises the temperature inside the refrigerator.

Purpose of the invention The present invention solves the above-mentioned problems of the conventional method.It does not require a large defrost water storage tank, and moreover, the defrost water transfer contributes to reducing the temperature rise inside the refrigerator during defrosting. It provides equipment.

Structure of the invention The invention simultaneously supplies electricity to the pump and the defrosting heater installed in the cooler when defrosting begins, cuts off electricity to the compressor, and supplies electricity to the defrosting heater when defrosting ends. A defrost timer is provided which has a switch that reduces the electric power to such an extent that the heat generated by the defrosting heater is negligible, and further delays the supply of electricity to the water pump by a predetermined period of time, and also switches the supply of electricity to the compressor.

DESCRIPTION OF EMBODIMENTS The configuration of an embodiment of the present invention will be described below with reference to FIG. 2, but since only the electric circuit is different, only the electric circuit will be explained.

In the figure, 20 is a power source, and 21 is a thermostat that controls ON/OFF of the compressor 2.
22 is a defrosting timer, which includes a timer motor 23;
Two switches 24, 25 that work together and switch at the same time
It is formed by And this switch 2
4 and 25 are turned on and off by cams (not shown) that move as the timer motor 23 rotates. 26 is a defrosting heater that removes frost from the cooler 14. 27 is a bimetal thermostat for ending defrosting, which opens when the temperature of the cooler 14 becomes high. Further, 28 and 29 are temperature fuses. The thermostat 21 has one end connected to the power supply 20 and the other end connected to the switch 24,
25, and is also connected to the timer motor 23. Further, one end of the compressor 2 is connected to a terminal of a switch 24, and the other end is connected to the other end of a power source 20 via the temperature fuse 28. The other end of the switch 24 is connected to a power source 20 via a bimetal thermostat 27, a temperature fuse 29, and a defrosting heater 26. Furthermore, one end of the timer motor 23 is connected to the power supply 20 via the thermostat 21, and the other end is connected to the connection portion between the bimetal thermostat 27 and the temperature fuse 29.
Further, the water pump 13 has one end connected to the power source 20 and the other end connected to a terminal of a switch 25.

Next, the operation of this electric circuit will be explained. When the thermostat 21 is ON (when cooling operation is required), the compressor 2 is normally connected to the power source by the switch 24. Also, switch 2
5 separates the water pump 13 from the power source 20. Then, when the timer 22 has elapsed for a certain period of time due to the rotation of the timer motor 23, the switches 24 and 25 are switched (defrosting starts). As a result, thermostat 21, switch 24, bimetal thermostat 27, temperature fuse 29, heater 2
6 and current flows to defrost the cooler 14. In addition, the switch 25 also starts operation of the water pump 13 to guide defrosting water to the evaporation tray 12. When the defrosting of the cooler 14 progresses and the bimetal thermostat 27 detects a temperature rise and opens (defrosting complete), the thermostat 27, the timer motor 23,
The flow of current is switched between the temperature fuse 29 and the heater 26. However, since the resistance of the timer motor 23 is greater than that of the heater 26, the heater 26 hardly generates heat, and the timer motor 23 starts rotating at a low speed. At this time, the water pump 13 is still energized. After the timer motor 23 has been operated for a predetermined time, the switches 24 and 25 are switched to stop energizing the water pump 13 and form an operating circuit for the compressor 2 (starting cooling operation). By this, not only during heating by the heater 26, but also after the heating is stopped.
Since the defrost water that has been defrosted by preheating and the defrost water that has accumulated is guided to the evaporation tray 12, the defrost water has been completely transferred when the cooling operation starts, and the defrost water does not freeze. It is something.

In this embodiment, in order to operate the water pump 13 at the same time as the heater 26 is energized,
As soon as the defrosting water flows out, the pump 13
Since the defrosting water is transferred by the air, it is not necessary to particularly increase the size of the defrosting water storage tank, and the ineffective space can be reduced and the effective internal volume can be increased. Furthermore, during defrosting, cooler 1
4. When the defrosting water is transferred, the warm air around the cooler 14 is simultaneously sucked. Therefore, since the rise in ambient temperature can be reduced, warm air does not increase the temperature inside the refrigerator after defrosting, and the cooling load can be reduced, which has the advantage of reducing power consumption.

Effects of the invention The present invention has the above-mentioned configuration, and provides the following effects. Since the water pump is activated at the same time as the defrosting heater is energized, there is no need to particularly increase the size of the tank for storing defrosting water, and the ineffective space can be reduced and the effective internal volume can be increased. Furthermore, at the same time as the pump transfers the defrosting water, it also sucks in the warm air around the cooler during defrosting and transfers it, reducing the inflow of warm air into the refrigerator and suppressing the rise in temperature inside the refrigerator. Therefore, the cooling load can be reduced and the amount of power consumption can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a refrigerator equipped with a conventional defrosting water transfer device, and FIG. 2 is an electrical circuit diagram of an embodiment of the present invention. 1... Refrigerator body, 2... Compressor, 3... Condenser, 12... Evaporation dish, 13... Water pump, 14
...Cooler, 22...Defrost timer, 25...
Switch, 26... Heater for defrosting.

Claims (1)

[Scope of utility model registration request] A compressor, a condenser, an evaporation tray provided above the condenser, a drainage pipe with one end opened below the cooler and the other end opened into the evaporation tray, and the cooling A pump is provided that sucks defrosting water from the container and guides it to the evaporating dish via the drain pipe, and when defrosting starts, the pump and a defrosting heater provided in the cooler are simultaneously energized, and Cut off the power to the compressor, reduce the power supplied to the defrosting heater to the extent that heat generation is negligible at the end of defrosting, further cut off the power to the water pump after a predetermined delay, and A defrost water transfer device equipped with a defrost timer that has a switch to energize the compressor.