JPH11280650A - Freezer having fluid avoiding stroke pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict compression heat of a vacuum pump as well as enhancing energy efficiency by providing to a cylinder a discharge valve for avoiding fluid in order to make a compression stroke of the piston a stroke for avoiding fluid, and sending refrigerant not containing compression heat generated by the fluid avoiding stroke to a spray port (expansion valve). SOLUTION: While a pump is in operation, a flow of refrigerant entering a cylinder of a pump from an intake valve 8 is in the same direction as a flow of refrigerant discharged from a fluid avoiding discharge valve 2. As a result, collision friction between fluid and a piston 1 is avoided, and a discharge stroke wherein compression heat is less likely to be generated is created. That is, refrigerant which has been discharged on a high pressure side by avoiding the fluid coming in from the intake valve 8 with the moving piston 1 in an intake stroke, passes through a crank case 3 to be discharged in a conduit 4. Then, the refrigerant is led to a spray port 6 through a condenser 5, and is sprayed into an evaporator 7, causing the freezing effect thereby.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator.

[0002]

2. Description of the Related Art As a method for suppressing the generation of compression heat of a compressor for a refrigerator, a vacuum / compressor for a refrigerator capable of suppressing the compression heat of the applicant and Japanese Patent Application No. Hei 6-2940.
There is a method of suppressing heat of compression by a 62 special compressor. Among these inventions, the latter attempts to suppress the compression heat by providing an impact force and a buffer plate on the piston, but the effect of suppressing the compression heat is not sufficient because the piston is provided with a partition plate. On the other hand, in the case of a double piston, the effect of suppressing the heat of compression is good and the refrigerating action is increased, but the piston has a disadvantage that the piston is double and long, so that the machine becomes large. A valve device provided on the upper surface of a conventional piston is a suction valve. Therefore, during the compression stroke, the suction valve is closed and compressed, so that generation of compression heat cannot be avoided.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for suppressing compression heat generated by a compression stroke of a compressor.

[0004]

As a method for making the compression stroke of the piston a stroke of the fluid, the piston is provided with a discharge valve for exchanging the fluid, and the compression heat generated in the stroke of the piston. Is sent to the spray port (expansion valve) through the space of the crankcase or the casing.

[0005]

[Operation] Since the flow of the refrigerant flowing into the cylinder 2 at a high speed from the suction valve 1 and the flow of the refrigerant discharged from the discharge valve 3 for intersecting the piston body are in the same direction, the collision friction between the fluid and the piston is avoided. As a result, the discharge stroke becomes less likely to generate heat of compression.
In other words, the refrigerant discharged to the high pressure side by the body moving (or escaping) the moving piston from the suction valve in the suction stroke through the crankcase 3 (caging) and the conduit 4 through the condenser 5 It reaches the spray port 6 and sprays at a discharge pressure that does not include heat of compression to obtain a refrigeration action. Even if the fluid sucked into the cylinder during the suction stroke is not compressed, the fluid is concentrated on a spray day with a small diameter in search of an outlet, and a spray pressure is inevitably generated. The pressure of the fluid generated by this imperfect residence includes the flow resistance of the fluid flowing through the pipes and other devices until the spraying date of the piston body, and the fluid frictional heat. This spray pressure affects the refrigeration action depending on the pressure specific to the refrigerant and the rotation speed of the pump. Since the refrigerant has a unique condensing liquefaction pressure, it becomes the original liquid refrigerant if the liquefied time is given to the atomized refrigerant without compression. There is no process of compressing vaporized gas with a conventional high-temperature compressor, and almost atomized refrigerant is liquefied and used. It is the reciprocating motion that allows this fluid to intersect, a unique function of the moving piston, an action not possible with a fixed cylinder head. Also, the refrigeration phenomenon is obtained by utilizing the maximum suction capacity of the piston machine by 100% and the suction pressure of a vacuum effect which is overwhelmingly strong against the spray pressure of the refrigerant.

[0006]

EXAMPLES Specifications of a horizontal two-cylinder vacuum / discharge pump according to the present invention. Piston diameter 30 mm Piston stroke 36 mm Motor power 100 W Rotation speed of vacuum and discharge pump 440 rpm Condenser specifications Aluminum pipe outer diameter 6 mm 内径 Inner diameter 4 mm Aluminum pipe length Approx. 8 m Outside aluminum pipe coil Diameter 300mm Fin None Blower power 30,5W Evaporator temperature -30 ° C Suction side pressure (low pressure side) 10cmHg (minus pressure) Discharge side pressure (high pressure side) Approx. 6 atm Refrigerant 134a equivalent to R-12 Refrigerant Product name 134a-E or SP34E Applications Cooler for automobile The rotation speed of the pump of the embodiment is an example, and a refrigeration phenomenon proportional to the rotation speed of the pump in a wide range from 60 rpm to 440 rpm or more can be obtained.

[0007]

To obtain the refrigeration phenomenon with the conventional compressor, 12
It requires a high pressure of about the atmospheric pressure, and also has a large amount of compression heat to take away the heat of compression.It also requires the use of electric power and cooling water for the blower or cooling water pump attached to this condenser. The amount is enormous. When the vacuum / discharge pump of the present invention is used, no compression heat is generated, so that only a low pressure of about 6 atm is required as in the embodiment, so that an enormous number of cooler and refrigerator pumps can be saved in energy and the present invention can be achieved. The condenser to be used is a very small blower-type condenser for treating the fluid frictional heat of the refrigerant, so that enormous electric power can be saved. In addition, since there is no compression stroke accompanied by an impact and the discharge stroke is changed, the noise is reduced. A feature of the present invention is that a pressure condition with less heat generation, which is more advantageous than a condition in which a refrigerant is sprayed into the natural world, is obtained. As described above, the conventional problem of imposing an enormous burden on the compressor due to the generation of compression heat and the problem of requiring a large-sized condenser can be solved at once by the dodge pump of the present invention.

[Brief description of the drawings]

FIG. 1 is a simplified diagram of a refrigerating apparatus having a pump configured in the body-stroke process of the present invention.

FIG. 2 is a reference drawing of an embodiment of a horizontal two-cylinder crossing pump using the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Piston head 5 Condenser 2 Body discharge valve 6 Spray port 3 Crankcase 7 Evaporator 4 Conductor 8 Suction valve

Claims (1)

[Claims] In order to make the compression stroke of the piston a body-crossing stroke, a discharge valve (2) for fluid body-crossing is provided inside the piston head (1). The refrigerant discharged into the piston reaches a spray port (6) via a condenser (5) connected to a conduit (4) of a crankcase (3), and communicates with a fluid provided in a piston head. A refrigerating apparatus having a pump constituted by a body-crossing stroke, wherein a refrigerant is sprayed at a discharge pressure of a discharge valve for use to obtain a refrigeration phenomenon.