JPS6217580A - 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] Technical field of invention The present invention relates to temperature control technology for refrigerators.

BACKGROUND OF THE INVENTION Conventional refrigerators are provided with a refrigerator compartment in addition to a freezer compartment, and a damper is provided only at the cold air intake of the refrigerator compartment. The internal temperature of the freezing compartment is controlled by detecting the internal temperature using a temperature sensor and directly controlling the compressor of the refrigeration cycle on and off. In addition, if frost adheres to the cooler of the refrigeration unit, the efficiency of heat exchange will decrease.
The control unit periodically performs the defrosting operation by stopping the compressor and the fan motor at regular intervals and energizing the defrosting heater near the cooler.

Disadvantages of the Conventional Technology In the conventional technology described above, the compressor is controlled only by the temperature of the freezer compartment, so when the temperature of the refrigerator compartment rises, even if the damper opens, cold air does not flow into the refrigerator compartment and cooling is interrupted. may not be carried out efficiently. In this case, when the temperature of the freezer compartment is dropping, the damper remains open until the compressor starts operating, waiting for the compressor to start. Accordingly,
It will take time to cool it down.

Additionally, when the defrost operation is started by a timer, etc., there is no damper at the entrance of the cold air to the freezer compartment, so the warm air from the defrost heater directly enters the refrigerator compartment, causing the temperature of the freezer compartment to temporarily rise. However, the constant temperature function of the refrigerator may be impaired.

Purpose of the Invention Accordingly, an object of the present invention is to provide a state in which sufficient cold air can be supplied from the freezer compartment when it becomes necessary to cool each compartment due to a rise in temperature in the refrigerator compartment, etc. The goal is to prevent the temperatures of each part from influencing each other.

Solution to the Invention Therefore, the present invention provides a temperature sensor and a damper for each of the freezing and refrigerating compartments, and drives the compressor of the refrigeration cycle based on the temperature information from these temperature sensors. The damper in the chamber involved in this is set to open at the same time as the compressor is driven. Such control can be realized not only by the refrigerator's control circuit, but also by software such as a control microcomputer.

Configuration of example First, FIG. 1 shows the configuration of a refrigerator 1 according to the present invention.

This refrigerator I has a freezer compartment 2, for example 1, from the top inside.
Two refrigerating chambers 3 are formed in a divided state, and they are in communication with each other through a cold air passage 4.

The compressor 5 of the refrigeration cycle is connected to the refrigerator compartment 3.
The cooler 6 of the refrigeration cycle is installed in the rear space of the freezer compartment 2, together with the heater 7 for defrosting.
It is provided in a space with the refrigerator compartment 3 at a position communicating with the cold air passage 4 and facing the fan motor 8 .

Further, temperature sensors 9 and 10 are provided inside each of the freezing compartment 2 and the refrigerator compartment 3, and each freezing compartment 2
A damper 13.14 for opening/closing is provided at the vent 11.12 of the refrigerator compartment 3. These dampers 13
．． 14 is a motor-type or electromagnetic-type actuator 1
5.16, it is driven in the opening/closing direction.

The compressor 5, defrost heater 7, fan motor 8, and actuator I5.16 are placed under the control of a control circuit 170.

This control circuit 17 is constituted by, for example, a microconvenience controller, and receives temperature information from the temperature sensors 9 and 10 as input, and executes on/off control of each part, as well as other functions necessary for the functions of the refrigerator 1. They also share control functions.

The internal temperature of the operational freezing chamber 2 of the embodiment is detected by the temperature sensor 9 and serves as an input of temperature information to the control circuit 17. Therefore, the control circuit 17 stops the compressor 7 and the fan motor 9 when the internal temperature of the freezing compartment 2 is lower than the target temperature, but when the internal temperature of the freezing compartment 2 becomes higher than the target temperature. , are activated at the same time, and the inside of the freezer compartment 2 is cooled by heat exchange by the cooler 6. At this time, the control circuit 17 simultaneously drives the actuator 15 and sets the damper 13 to the open state. Therefore, the internal air of the freezer compartment 2 is moved to the vent 11 by the fan motor 8.
The air circulates through the freezer compartment 2 and through the cold air passage 4. In this way, when the internal temperature of the freezer compartment 2 becomes lower than the target temperature, the control circuit 17 detects this state with the temperature sensor 9, automatically stops the compressor 5 and the fan motor 8, and also stops the actuator. By driving the damper 15, the damper 13 is set to the closed state. In addition, in the above operating state, since the actuator 16 does not operate, the damper 14 is in a closed state, and is set in a state where it is not affected by cold air from the freezer compartment 2.

On the other hand, when the internal temperature of the refrigerator compartment 3 becomes higher than the target temperature, the control circuit 17 similarly detects the state using the temperature sensor 10 and drives the corresponding actuator 16 to open the damper 14. At the same time as setting the state,
By starting the compressor 5 and fan motor 8 and operating the refrigeration cycle, a state is set in which a sufficient amount of cold air can be supplied to the inside of the refrigerator compartment 3. Moreover, in this state, the control circuit 17 sets the damper 13 in a closed state so that the cold air does not circulate inside the freezer compartment 2.

Therefore, the cold air from the cooler 6 is efficiently supplied to the corresponding refrigerator compartment 3 independently from the cold air inside the freezer compartment 2. However, it is advantageous if the damper 13 is set in an open state during this operation, since the supply capacity of cold air will be increased.

Note that when the damper 13 is closed and the temperature of the freezing chamber 2 is higher than the target temperature, the cooling capacity of the refrigeration cycle is less than when the damper 14 is open.

Therefore, the control circuit 17 controls the compressor as necessary.
By lowering the rotational force of 5, the engine can be operated at the minimum necessary level.

On the other hand, this control circuit 17 performs a defrosting operation intermittently at regular intervals, supplies power to the defrosting heater 7 during the defrosting operation period, and defrosts the cooler 6 using the Joule heat. Start transaction. At this time, warm air will flow into the cold air passage 4, so the control circuit 17 prohibits the activation of the compressor 5 and closes all dampers 13, 14 to remove the warm air from the heater 7. This prevents inflow.

FIG. 2 illustrates the on/off state and open/close state of each device for each of the above operation modes.

Effects of the Invention In the present invention, when cooling is required in each part of the freezer compartment or refrigerator compartment in the refrigerator, cold air is supplied to each compartment by opening the damper corresponding to each compartment, and in that state, the cooling air is always supplied to each compartment. Since the compressor is set to start, the amount of heat necessary to cool the area can be secured, and the cooling can be done quickly.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the refrigerator of the present invention, and FIG. 2 is an explanatory diagram of its operation. l...Refrigerator, 2...Freezer, 3...Refrigerator, 4...Cold air passage, 5...Compressor, 6...Cooler, 7...
Heater for defrosting, 8...Fan motor, 9...Temperature sensor, 10...Temperature sensor, 11...Vent, 12...
・Vent, 13... Damper, 14... Damper, 15
°°Actuator, 16... Actuator, 17...
・Control circuit. Figure 7 Figure 2

Claims (1)

[Claims] Temperature sensors installed in each of the multiple rooms, dampers installed in each vent of each room that can be opened and closed, and signals from each temperature sensor drive the compressor of the refrigeration cycle, and the temperature involved in the above signals. A refrigerator comprising a control circuit that opens a damper provided in a chamber in which a sensor is installed at the same time as the compressor is driven.