JP2680711B2 - Refrigeration equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a refrigerating apparatus suitable for being installed in a passenger compartment of an automobile.

(Prior Art) A system diagram of a conventional device is shown in FIG. 6, and a vertical sectional view of a refrigerating device is shown in FIG.

In FIG. 6, the cooling switch 41 is turned on during the cooling operation.
When turned on, the compressor 1 is started by the command from the control device 8 and the solenoid valve 12 is opened.

Thus, the high-temperature, high-pressure refrigerant gas discharged from the compressor 1 enters the condenser 2 and is condensed and liquefied by exchanging heat with the outside air sent by the fan 10. This liquid refrigerant passes through the solenoid valve 12 and the expansion valve. 3 and adiabatically expands by being throttled here, and then enters an evaporator 4 for cooling, where air in the vehicle compartment sent by a fan 11 is cooled and vaporized. The refrigerant gas then returns to the compressor 1 where it is compressed again.

During the refrigerating operation, when the refrigerating switch 42 is turned on, the solenoid valve 12 is closed by a command from the control device 8, and
The refrigeration fan 7 is activated.

Thus, the liquid refrigerant condensed and liquefied in the condenser 2 enters the refrigerating evaporator 6 arranged in the refrigerating apparatus 5 through the constant pressure expansion valve 9, and cools the air in the refrigerator sent by the refrigerating fan 7 there. It is vaporized, and then returns to the compressor 1 via the check valve 13.

When the refrigerating switch 42 is in the ON state, the solenoid valve 12 is opened / closed at a predetermined time interval in response to a command from the control device 8, and the cooling operation and the refrigerating operation are alternately performed.

 Details of the refrigerator 5 are shown in FIG.

The inside of the main body 20 of the refrigerating apparatus 5 is a refrigerator with a partition plate 21
It is divided into 22 and a cooling chamber 23. A refrigerating object 24 such as a juice can is stored in the refrigerator 22, and a refrigerating evaporator 6 and a refrigerating fan 7 are arranged in the cooling chamber 23.

During operation of the refrigerating apparatus 5, cold air cooled by flowing through the refrigerating evaporator 6 is blown into the refrigerator 22 through the air outlet 25 formed in the partition plate 21, and in the process of flowing through this. After cooling the object to be refrigerated 24, the bottom plate 26 of the refrigerator 22
The air is returned to the cooling chamber 23 through the suction port 27, the exhaust path 28, and the intake port 29 formed in the partition plate 21, and is again sucked by the refrigeration fan 7 and is energized.

(Problems to be Solved by the Invention) In the conventional refrigeration system described above, the refrigeration switch 42 is turned on.
In the state, the refrigerating operation is performed even when the item to be refrigerated 24 is not stored in the refrigerator 22, so power is wasted and the cooling operation is intermittently performed, so There was a problem that the cooling feeling was impaired.

(Means for Solving the Problems) The present invention has been invented to solve the above problems, and the gist of the present invention is to provide a refrigerating evaporator for cooling the inside of the refrigerator in which the objects to be refrigerated are stored. Provided, the refrigerant discharged from the compressor during the cooling operation is circulated to the compressor through the condenser, the electromagnetic valve, the expansion valve, and the evaporator for cooling, and the refrigerant discharged from the compressor during the cooling operation is the condenser, the expansion valve, The evaporator for refrigeration, which is circulated to the compressor through a check valve, and when the refrigeration is turned on, the electromagnetic valve is opened and closed by a predetermined time interval so that the refrigeration operation and the refrigeration operation are alternately repeated. Detecting means for detecting the presence or absence of the object to be refrigerated in the refrigerator, and the refrigerating switch being turned on when the absence of the object to be refrigerated is detected by the detecting means. In the refrigerating apparatus, the control means for keeping the electromagnetic valve open and stopping the refrigerating operation is provided.

(Operation) Since the present invention has the above-mentioned configuration, when the detection means detects the absence of the object to be refrigerated in the refrigerator, the refrigeration operation can be performed by the command from the control means even if the refrigeration switch is turned on. Be stopped.

(Embodiment) One embodiment of the present invention is shown in FIG. 1 to FIG.

As shown in FIG. 2, the bottom plate 26 of the refrigerator 22 is inclined downward toward the side wall 30, and the bottom 33 of the groove 32 formed by the end wall 31 of the bottom plate 26 and the side wall 30 has a limit switch or the like. A detection switch 34 is provided.

Then, the object to be refrigerated 24 stored in the refrigerator 22 rolls on the slanted bottom plate 26, falls into the groove 32, contacts the detection switch 34, and activates it.
Therefore, the detection switch 34 does not operate when the item to be refrigerated 24 is not stored in the refrigerator 22.

The detection switch 34 may be disposed below the side wall 30 forming the groove 32, as shown in FIG.

Other configurations are the same as those of the conventional one shown in FIG. 5, and corresponding members are denoted by the same reference numerals.

The output of the detection switch 34 is input to the control device 40 as shown in FIG.

FIG. 3 shows a control flowchart of the control device 40.

When the control starts, the cooling switch 41
Is determined to be ON, and if it is ON, the compressor 1 is started in step and the cooling operation is started. Next, in step, it is determined whether the refrigeration switch 42 is 0, and if it is ON, it is determined in step whether the detection switch 34 is ON. When it is ON, the refrigeration fan 7 is started in steps. Then, in step, the solenoid valve 12 is opened and closed at predetermined time intervals to alternately perform the cooling operation and the refrigerating operation.

When the cooling switch 41 is determined to be OFF in step, the cooling operation is not performed.

When it is determined that the refrigeration switch 42 is OFF at step or when the detection switch 34 is determined to be OFF at step, the refrigeration fan 7 is stopped at step, and the solenoid valve 12 is opened at step, so cooling is performed. Only operation is performed continuously.

(Effects of the Invention) In the present invention, when the detection means detects the absence of the object to be refrigerated in the refrigerator, the electromagnetic valve remains open according to the command from the control means even if the refrigeration switch is turned on. Since the refrigerating operation is maintained and stopped, power consumption can be prevented by preventing unnecessary refrigerating operation and the cooling operation can be continuously performed. Can be stopped.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 3 show an embodiment of the present invention, FIG. 1 is a system diagram, FIG. 2 is a vertical sectional view of a refrigerating apparatus, and FIG. 3 is control of a control means. It is a flowchart. FIG. 4 is a longitudinal sectional view corresponding to FIG. 2 showing another embodiment of the present invention. Fifth
FIG. 6 and FIG. 6 show an example of a conventional apparatus, FIG. 5 is a vertical sectional view of a refrigerating apparatus, and FIG. 6 is a system diagram. Refrigerator: 5, Refrigerator: 22, Refrigerator: 24, Cooling means: 6, 7, 12, Refrigeration switch: 42, Detection means: 34, Control means: 40

Claims (1)

(57) [Claims] 1. A refrigerating evaporator for cooling the interior of a refrigerator in which an object to be refrigerated is stored. Refrigerant discharged from a compressor during cooling operation passes through a condenser, a solenoid valve, an expansion valve, and a cooling evaporator. Refrigerant discharged from the compressor during refrigeration operation circulates to the compressor through the condenser, expansion valve, refrigeration evaporator, check valve, and when the refrigeration switch is turned on, the solenoid valve has a predetermined time interval. In a refrigerating device in which the cooling operation and the refrigerating operation are alternately repeated by being opened and closed by, a detection means for detecting the presence or absence of the object to be refrigerated in the refrigerator,
When the absence of the object to be refrigerated is detected by the detection means, control means is provided for keeping the electromagnetic valve open and stopping the refrigeration operation even if the refrigeration switch is turned on. Refrigerator.