JPS589162Y2 - portable refrigerator - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a power supply device for a portable refrigerator.

In recent years, there has been an increasing demand for portable refrigerators that are powered by the batch-no power source of automobiles and motorboats.

The cooling device of such a portable refrigerator is usually installed on the side wall of the refrigerator.

However, this type of refrigerator has a cooling device installed on the side wall, making it large in size, and furthermore, there are problems in terms of aesthetic appearance.

In response to this, the applicant has created a portable refrigerator that is smaller in size and has an aesthetically pleasing appearance by providing a cooling device inside the top lid that closes the upper opening of the refrigerator case. This is what we provide.

However, as will be explained in detail later, portable refrigerators with a built-in cooling device inside the top lid have a compressor cooling system installed in the cooling system when the top lid is opened to take things in and out, or when the vibration of a car or the rocking of a motor boat is intense.・It has the disadvantage that lubricating oil is sucked in.

An object of the present invention is to provide a technique for preventing oil from being sucked into the cooling system in such a portable refrigerator in which a cooling device is provided within the top lid.

According to the present invention, the compressor of the cooling system is configured to automatically stop operating if the top cover is tilted at a certain angle or more or if the top cover is separated from the case that forms the refrigerator, thereby preventing oil intake. Prevented.

The present invention will be described in more detail below with reference to embodiments shown in the accompanying drawings.

FIG. 1 is a cross-sectional side view of a portable refrigerator in which a cooling device is housed within the top lid.

That is, the refrigerator is formed of a case 40 formed by an upper lid 20 and a heat insulating material 45 that defines a cooling chamber 42.

Compressor 1 and condenser 3 are installed inside the top lid 20.
and evaporator 5 are respectively connected to each other in a closed loop by pipes 7.8.9.

The capacitor 3 is arranged close to the upper surface of the upper lid 20,
The evaporator 5 is arranged at the bottom of the upper lid 20, and both are isolated by a heat insulating material 45.

The inside of this closed loop is filled with Freon, and the Freon gas compressed by the compressor 1 is sent into the condenser 3 through the pipe 7, where it is condensed and liquefied.

Therefore, a heat generation phenomenon occurs in the condenser 3, and the generated heat is radiated into the atmosphere through the upper surface of the upper cover 20.

Further, the freon liquefied in the condenser 3 is introduced into the evaporator 5 through the pipe 8 and vaporized again, absorbing a large amount of heat from the inside of the cooling chamber 42 at this time.

The cooling effect described above is well known.

As shown in FIG. 2, a compressor main body 2 is housed inside the compressor 1, and the compressor main body 2 has a suction port 52 for sucking in Freon gas, and a suction port 52 for sending compressed Freon gas to a condenser 3. A pipe 7 is provided.

Further, around the compressor main body 2, oil 50 for cooling and lubricating is supplied to the compression system inside the compressor main body 2.

Therefore, when the user opens or removes the top cover 20 to take things into and out of the refrigerator 42, or when the vibration of an automobile or the rocking of a motor boat is severe, the slope of the top cover 20 increases, causing the oil 50 to be sucked in together with the Freon gas. The air is sucked into the compressor main body 2 through the port 52.

When this phenomenon occurs, the compression action of the compressor decreases, and furthermore, oil enters the inside of the condenser 3 and evaporator 5, resulting in a significant decrease in cooling efficiency.

Furthermore, once oil has entered the cooling system, it is difficult to remove it and an overhaul is required.

As mentioned above, this invention provides a technique for preventing such oil infiltration.

According to an embodiment of the invention shown in FIG. 1, one of the conductors 34,35 connected to the terminal 30 supplying power to the compressor is provided with a switch mechanism 31,32, the switch mechanism 31 being The switch mechanism 32 is formed so as to enter the cut-off state when the top cover 20 is tilted at a predetermined angle or more, and the switch mechanism 32 is formed such that the switch mechanism 32 enters the cut-off state when the top cover 20 is separated from the case 40.

A typical example of the switch mechanism 31 is a mercury switch.

As is well known, a mercury switch is formed by mercury sealed in a cylinder and a pair of electrodes provided in the cylinder.

Therefore, when a mercury switch is used as the switch mechanism 31, if the top cover 20 is tilted beyond a certain angle determined by the relative relationship between the mercury sealed inside the cylinder and the pair of electrodes provided on the cylinder, the mercury will It separates from between the electrodes and creates a disconnection state between both electrodes.

Therefore, in this case, the mercury switch will stop the compressor even if the car is violently vibrating or the motorboat is shaking violently, so there is no oil inside the cooling system.
0 is never inhaled.

FIG. 3 shows an example of the switch mechanism 32 in FIG. 1.

That is, an elastic spring 74 is enclosed between an outer cylindrical body 81 having a closing body 85 and an inner cylindrical body 83 having a closing body 73. One end of the spring 74 is fixed to the closing body 73, and the other end is fixed to the inner cylindrical body 83. Disc 7 of cylinder 78 inserted into cylinder 83
It is fixed to 9.

For convenience of explanation, the closure body 7 is shown in the axial direction of the cylinder 78.
The side where No. 3 is provided is called the front, and the opposite side is called the rear.

The closing body 73 and the inner cylindrical body 83 are made of an insulator, and the closing body 73 is provided with a pair of electrodes 71 and 72.

The cylinder 78 has a conductor 76 at its front end and is movable inside the inner cylinder 83 .

Also, the rear end 80 of the cylinder 78 is normally
8 is biased rearward by the spring 74, so that it protrudes outside the outer cylindrical body 81 as shown.

The contact 70 having the above configuration is usually embedded in the contact surface of the upper lid 20 with the case 40 in FIG. 1 (for example, the surface 21 in FIG. 1) so that the rear end 80 of the cylinder 78 protrudes. .

As a result, when the upper lid 20 is closed, the cylinder 78 moves forward against the elastic force of the spring 74, and the electrodes 71.7
2 are connected by a conductor 76.

Therefore, when the upper lid 20 is closed, the compressor main body 2 shown in FIG. 2 operates to perform cooling.

When the top cover 20 is raised to take things in and out, the cylinder 78 moves rearward due to the elastic force of the spring 74, thereby cutting off the electrodes 71 and 72.

Therefore, in this case, since the operation of the compressor main body 2 is stopped, oil will not be sucked into the compressor main body 2 from the suction port 52 even if the upper cover 20 is tilted.

As is clear from the above explanation, according to the present invention, it is possible to reliably stop the compressor drive when the top cover is opened, and it is also possible to reliably stop the compressor drive even when the vibration of an automobile or the shaking of a motorboat is severe. It becomes possible to stop the drive.

Therefore, it is possible to prevent oil from being sucked into the cooling system of the portable refrigerator under any usage conditions.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional side view of a portable refrigerator with a built-in cooling device inside the top lid, Fig. 2 is a cross-sectional side view of the compressor, and Fig. 3 is an example of the contacts used in the present invention. FIG. 1...Compressor, 2...Compressor itself, 3...Condenser, 5...
... Evaporator, 7°8.9 ... Pipe, 20 ... Upper lid, 31.32 ... Switch mechanism, 34.35 ... Conductor, 45...
...Insulation material, 50...Oil, 52...
・Intake port, 70...Contact.

Claims (2)

[Scope of utility model registration request] (1) A case 40 that defines a cooling chamber and an upper opening thereof are closed, and the cooling device is connected to a power source via a first and second switch mechanism. The first switch mechanism 31 is of a type in which mercury or the like is sealed in a cylinder provided with a pair of electrodes configured to be cut off when the top cover is tilted at a predetermined angle or more; The portable refrigerator is characterized in that the switch mechanism 32 of No. 2 is of a type in which when the top cover is separated from the case, the conductor 76 is separated from the pair of electrodes 71 and 72 by a spring elastic force, thereby cutting off the electrodes. (2) The second switch mechanism 32 includes an outer cylindrical body 81 having a closing body 85 and a closing body 7 inserted therein.
3, and a piston inserted into the inner cylinder whose rear end protrudes outside the outer cylinder 81, has the conductor 76 at its front end, and has a disk 79 at its rear. 78
and an elastic spring 76 inserted between the two cylindrical bodies and having one end fixed to the closing body 73 and the other end fixed to the disc, and a resilient spring 76 provided at a position facing the piston of the closing body 73. The above-mentioned electrodes 71 and 72 are rounded and provided on the contact surface of the upper cover 20 with the case 40. A portable refrigerator according to claim (1) of the utility model registration claim, characterized in that: