JPS59215573A - Refrigerating storehouse - 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 Field of Industrial Application The present invention relates to a refrigerated storage such as a vending machine, which defrosts frost on the evaporator of a cooling system by blowing air from a blower fan when cooling operation is stopped. .

Conventional Structure and Problems Conventionally, vending machines are generally known as this type of refrigerated storage, so the conventional vending machine will be explained with reference to FIGS. 1 to 3.

1 is the main body of the vending machine consisting of an insulated box; this main body 1
A product storage shelf 4 is provided in the warehouse interior 3 (generally, the product storage shelf 4 may be a serpentine track or a slant shelf, so a description thereof will be omitted). A re-vaporator 5 for cooling and a blower fan 6 for cooling are arranged in the refrigerator interior 3. The cooling system includes an electric compressor 7. Capacitor 8. Dryer9. Gear pillar tube 10. The evaporators 5 are sequentially connected by piping. A condenser fan 11 cools the condenser 8 and the electric compressor 7.

Next, the electric circuit will be explained. Through the cooling thermostat 12, the electric compressor 7. The condenser fans 11 are each connected to a power source, and the ventilation fan 6 for cooling the inside of the refrigerator is connected to a power source.

In the above configuration, the cooling thermostat 12 is
Detects the temperature and turns OFF. For this reason, the electric compressor 7 connected via the cooling thermostat 12
．． The condenser fan 11 is a cooling thermostat 12
ON-OFF control is performed to cool the interior 3 of the refrigerator to a constant temperature. Unfortunately, the air blower 77-6 for cooling the inside of the warehouse will be in continuous operation. Therefore, the frost that adheres to the evaporator 6 of the cooling system is removed from the air inside the refrigerator (usually refrigerated at 5 to 6 degrees Celsius).
The defrost water was expelled from the refrigerator by exchanging heat and melting. However, as mentioned above, even when the cooling thermostat 12 is open and the evaporator 6 is not being cooled, and the cooling operation is stopped, the blower fan 6 is energized, so the air blower 77 is in the opposite direction to the cooling inside the refrigerator. It had the disadvantage of being a heat load.

There is heat generated from the ventilation fan 6 in the trench, which leads to an increase in the cooling load, which has the disadvantage of increasing electricity costs.

OBJECTS OF THE INVENTION The present invention aims to eliminate the above-mentioned drawbacks, not only to save power but also to completely perform cycle defrosting, and to prevent products in the refrigerator from freezing at low outside temperatures.

Structure of the Invention The refrigerated storage of the present invention has various temperature settings in which the operating temperature of the fan thermostat is cut in while the cooling system is in operation and cut out at the end of defrosting. After defrosting the frost by using the air from the blower fan, the blower fan is stopped, which saves power and can delay the operation of the fan depending on the amount of frost. In addition, when the outside temperature is low enough to cause the products in the refrigerator to freeze, the fan thermostat closes to prevent the products in the refrigerator from freezing due to the heat generated by the fan.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 4 and 6. Components that are the same as the conventional ones will be given the same numbers and detailed explanations will be omitted, and different electric circuits will be described. I will mainly explain.

12 is a double-pole, double-throw type cooling thermostat.

It consists of two switches, switch 12a and switch 12b, and each switch 12a, 12b is connected in parallel. Further, 13 is a fan thermostat for controlling the air blower 77 for evaporation. The electric compressor 7 and the capacitor 77 are each connected to a power source via a switch 12a of a double-pole, double-throw cooling thermostat 12.

Well, the blower fan 6 and fan thermostat 13 are
It is connected in parallel to the cooling thermostat 12, and the switch 12b of the double-pole, double-throw cooling thermostat 12 is connected in series to the blower fan 6.

Then, the temperature sensing setting of the fan thermostat 13 that senses the temperature of the evaporator 6 is changed to the cooling thermostat 12.
The temperature is set to cut in when the circuit is closed and to cut out at the temperature at which the evaporator 6 finishes defrosting.

In the electric circuit set in this way, when the cooling thermostand 12 changes from the open state to the closed state (at t0 in FIG. 6), the electric compressor 7. Condenser fan 11. The blower fan 6 is energized and starts cooling the inside 3 of the refrigerator. Further, at time t1 when the cooled fan thermostat 13 reaches the temperature d, the fan thermostand 13 closes.

Next, at time t2 when the cooling thermostat 12 reaches the temperature C and completes cooling, the cooling thermostat 12 is opened and the electric compressor 7. No voltage is applied to the condenser fan 11 side and it stops. However, since the fan thermostat 13 is closed at this time, the blower fan 6 continues to operate. When the fan thermostat 13 detects the end of defrosting of the evaporator 5 (at the time t3 when the temperature reaches the temperature level), the fan thermostat 13 cant out, and the blower fan 6 stops. Repeat this operation every cycle. In this way, the blower fan 6 is delayed so that defrosting is completely completed in each cycle, so cooling operation can be performed in completely frost-free conditions, bypassing dry and humid conditions, improving the cooling effect. Moreover, since the blower fan stops after defrosting is completed, power can be saved by the amount of input and heat generated by the blower fan. Further, when the outside temperature becomes negative, the fan thermostat 13 closes and the air blower 77 is operated, so the inside of the refrigerator is warmed by the heat generated by the fan and the products do not freeze.

Effects of the Invention As described above, the present invention sets the temperature-sensitive setting of the fan thermostat to a setting that cuts in during cooling operation of the cooling system and cuts out at the temperature at the end of defrosting. The blower fan is stopped at the same time as the sheathing is completed, which not only saves electricity, but also allows the fan to be operated with a delay depending on the humidity conditions, such as high humidity or dryness, so no frost remains. Improves the efficiency of the cooling system. Furthermore, even if the outside temperature reaches a level that could cause freezing, the fan thermo is energized and generates heat from the fan, which prevents the products inside the refrigerator from freezing.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view of a vending machine showing a conventional example, Fig. 2 is a system diagram of Fig. 1, Fig. 3 is an electrical wiring diagram of Fig. 1, and Fig. 4 is an example of the present invention. Electrical wiring diagram showing an example,
FIG. 6 is a time chart diagram of FIG. 4. 7... Electric compressor, 11... Condenser fan, 16... Cooling thermostat, 16...
...Blower fan 0 Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3

Claims (1)

[Claims] Electric compressor, -77 den length, capillary tube. The evaporators are connected in sequence, the evaporator is installed inside the refrigerator, and two switches are provided to switch depending on the temperature inside the refrigerator.Through one of these switches, the electric compressor,
Connect the condenser fan to the power source, and install a fan thermostat that connects the other switch to the blower fan that sends air to exchange heat with the evaporator, and shorts the other switch.The operating temperature of this fan thermostat is A refrigerated storage facility that is set to cut in when the cooling system is operating, and cut out at the temperature at the end of defrosting.