JP3161382U - Cam pump for refrigerant recovery machine - Google Patents

Abstract

Provided is a cam pump for a refrigerant recovery machine, which has a feature of a small volume structure, high efficiency, and industrial utility value and sufficiently meets the demand for refrigerant recovery. The present invention is applied to a pump facility for collecting refrigerant, and includes a cam 2 and, after driving a motor 11, causes a plurality of pistons to reciprocate according to the principle of the cam, and a cylinder 3 and a valve 4 to be engaged. Performs immediate fluid extraction. A cam-type structure is used to cause the pistons to move in the same direction or in opposite directions. [Selection] Figure 2

Description

The "camera type pump for refrigerant recovery machine" of the present invention relates to a pump device for extracting refrigerant fluid, and particularly relates to a technical area in which a plurality of pistons are moved in the same direction or in the reverse direction using a cam type structure. .

With the development of science and technology, the application of refrigerants has become very widespread in daily life, for example, home refrigerators, coolers, refrigeration equipment, and automobile air conditioners. Traditionally, refrigerants were leaked directly during repairs of refrigerators and coolers, but this not only pollutes the atmosphere, but in the unlikely event that the refrigerant is exposed to high temperatures, it ignites and creates toxic substances that can harm the human body. In recent years, therefore, a fluid such as a refrigerant is extracted by a refrigerant recovery machine, and the refrigerant is recovered in a specific container. This corresponds to the safety of work and is also an approach to global environmental problems.

With regard to the existing refrigerant recovery machine, the inventor has realized that these structures are not designed appropriately for the internal structure, and there is room for further improvement and necessity. Therefore, the inventor researches and develops the present invention and proposes it to improve the shortcomings of the existing products.

The main object of the “cam type pump for refrigerant recovery machine” of the present invention is to provide the following cam type pump for refrigerant recovery machine. It comprises at least two pistons and a cylinder, the two pistons are moved by cams, and when the cams are actuated, the two pistons immediately start reciprocating simultaneously and in the same direction to the reciprocating stroke of the pistons With multiple piston motions, including motion and reverse motion, the present invention achieves the purpose of high efficiency, small volume refrigerant fluid extraction.

      In order to achieve the above object, the present invention specifically includes the following contents. The main body provided for the present invention is provided with a motor at one end thereof, the output end of the motor is used as a shaft body, a space is provided inside the main body, and the shaft body of the motor is inserted and disposed in the space. An eccentric rotating body is provided on both sides of the central rotating body provided in the cam, penetrating the shaft body through the cam, a bearing is fitted on the outside of each eccentric rotating body, and further externally fitted on the outside of the bearing. A ring is combined, an extension body is provided at one end of the outer fitting ring, and a piston is connected to the end of the extension body. Opening portions are provided on both sides of the main body which are symmetrical, and each opening portion is provided with a cylinder. The piston incorporated in the cylinder performs reciprocating motion.

It is preferable to provide a fan at the outer end of the motor, so that the temperature during operation can be lowered and a heat dissipation effect is exhibited.

      An annular portion may be formed at the outer edge of the main body space, and the annular portion is covered with a plate to seal the space.

Each cylinder is combined with a valve, the inside of the cylinder and the inside of the valve are connected, and the valve is provided with an inlet and an outlet. As the piston reciprocates within the cylinder, pressure is created causing the valve to extract the pump.

It is preferable that a shaft hole passes through a central portion of the central rotating body in the cam, and a shaft body of a motor is inserted into the shaft hole. When the said shaft hole penetrates each eccentric rotary body, it is located in the non-center location of each eccentric rotary body.

      In one embodiment, the centers of the two eccentric rotators on each side of the central rotator are located on non-coaxial axes. Therefore, when the central rotating body rotates due to the rotation of the shaft body, the two eccentric rotating bodies cause an eccentric motion with a difference in angle, and the pistons on both sides of the cam cause a reciprocating motion in the opposite direction. The two valves in this method have the feature of increasing the absorption capacity because they simultaneously perform pump extraction.

In another embodiment, the centers of the two eccentric rotators on each side of the central rotator described above are located on the same axis. Therefore, when the central rotating body rotates due to the rotation of the shaft body, the two eccentric rotating bodies cause an eccentric motion of the same angle, and the pistons on both sides of the cam cause a reciprocating motion in the same direction. Since the two valves in this method perform pump extraction by turns, the operation is smooth and is based on the law of inertia.

It is a three-dimensional external view of this invention. It is a three-dimensional exploded view of the present invention. It is the three-dimensional exploded view of the cam regarding this invention. It is an operation state diagram of the cam concerning the present invention. It is another operation | movement state diagram of the cam regarding this invention. It is the three-dimensional exploded view of the cam regarding the other Example of this invention. FIG. 7 is an operational state diagram related to the embodiment of FIG. 6.

As shown in FIGS. 1, 2, 3, and 4, the “refrigerant cam cam pump” of the present invention includes a main body 1, a cam 2, a cylinder 3, and a valve 4.

The main body 1 has an approximately body shape, and is provided with a motor 11 at one end of the main body 1, a fan 12 at the outside of the motor 11, and an output end of the motor 11 as a shaft body 14. A space 13 is provided inside, and the shaft body 14 of the motor 11 is inserted into the space 13. The cam body 2 is passed through the shaft body 14, and a shaft body bearing 141 is disposed at the end of the shaft body 14. Further, the body 1 is provided with openings 15 on both sides that are symmetrical, and the cylinder 3 is provided at each of the 15 openings. An annular portion 16 is provided on the outer edge of the space 13 of the main body 1, and the annular portion 16 covers the plate 17 by combining a Teflon oil seal 161 and a rubber packing 171 with a screw 172, and seals the space 13.

      The cam 2 includes a central rotating body 21, eccentric rotating bodies 22 are provided on both sides of the central rotating body 21, bearings 24 are fitted outside the eccentric rotating bodies 22, and Further, an outer fitting ring 25 is further combined, and a piston 27 is connected to the end of the elongated body 26 provided at one end of the outer fitting ring 25. In the present embodiment, when the shaft hole 23 penetrates each eccentric rotator 22, it is positioned at a non-central location of each eccentric rotator 22. In 21 it is located in the center.

      The cylinder 3 is combined with 15 openings of the main body 1, the inside of the cylinder 3 has a hollow chamber 31, and the piston 27 incorporated in the hollow chamber 31 reciprocates. The number of openings 15 in the present invention is preferably two, and corresponds to the number of cylinders 3 and the openings 15.

The valve 4 is provided outside the cylinder 3 to be engaged, the inside of the cylinder 3 and the inside of the valve 4 are connected, and the valve 4 is provided with an inlet 41 and an outlet 42. When the piston 27 reciprocates in the cylinder 3, pressure is created and the valve 4 is caused to extract the pump.

      When the present invention having the above-described structure is operated, the shaft body 14 also rotates as the motor 11 is started, and the central rotating body 21 and the two eccentric rotating bodies 22 are simultaneously operated by the action of the cam 2 penetrating the shaft body 14. Rotate. As shown in FIGS. 4 and 5, since the centers of the two eccentric rotating bodies 22 are not located at the 23 shaft holes, the cam 2 is caused to rotate eccentrically. Since the two eccentric rotating bodies 22 cause an eccentric motion having a difference in angle, the two pistons 27 located on both sides of the cam 2 are caused to reciprocate in opposite directions. That is, the two valves 4 simultaneously perform pump extraction with simultaneous inward movement or simultaneous outward movement. Since the two valves 4 perform the pumping operation simultaneously by this motion method, the efficiency becomes higher than that of a single piston and single valve, and the extraction capacity is enhanced.

      FIG. 6 shows another embodiment of the present invention. In this embodiment, in particular, the cam arrangement is slightly changed. Eccentric rotary bodies 52 are provided on both sides of the central rotary body 51 provided in the cam 5, bearings 54 are fitted outside the eccentric rotary bodies 52, and an outer fitting ring 55 is further provided outside the bearing 54. Is provided. Further, an extended body 56 is provided at one end of the outer fitting ring 55, a piston 57 is connected to the end of the extended body 56, and a shaft hole 53 is opened at the central axis portion of the cam 5. In this embodiment, the shaft hole 53 is located at a non-central location of each eccentric rotator 52 when passing through each eccentric rotator 52, but is located at the central location of the central rotator 51. In particular, since the centers of the two eccentric rotators 52 are on the same axis, the two eccentric rotators 52 are simultaneously offset in one direction with respect to the shaft hole 53, and are fitted into the side surfaces of the central rotator 51. Screw holes 512 are provided between 511. An insertion bone 581 of a weight 58 is fitted in the insertion groove 511, and a through hole 582 for fixing the weight 58 to the central rotating body 51 with a screw 583 is provided on the weight 58. When the two eccentric rotating bodies 52 are installed, there is a deviation in one direction from the shaft hole 53 at the same time. Therefore, when the shaft body 14 rotates, the center of gravity shifts also in the rotation of the two eccentric rotating bodies 52 arranged eccentrically. In order to solve this problem, a weight 58 is particularly arranged in the present invention. The weight 58 is provided at an end corresponding to the eccentric portion of the eccentric rotator 52 located in the central rotator 51, and this balance design eliminates the center of gravity shift.

      When the present invention having the above-described structure is operated, the shaft body 14 rotates as the motor 11 is started, and the shaft body 14 rotates the central rotating body 51 and the two eccentric rotating bodies 52 through the cam 5 simultaneously. Since the centers of the two eccentric rotating bodies 52 are not located at the shaft hole 53, the eccentric rotating motion of the cam appears as shown in FIG. The centers of the two eccentric rotating bodies 52 are located on the same axis, and when the cam reciprocates, the two pistons 57 reciprocate in the same direction. That is, when one of the pistons 57 moves in the inner direction, the other piston 57 moves in the outer direction, and the two valves 4 alternately cause a pump extraction action. With this motion method, the direction of operation of the cam 5 is always the same as the direction of motion of the piston 57, and the present invention has the advantage of conforming to the smoothness of operation and the law of inertia.

1 ----- Main body 11 ---- Motor 12 ---- Fan 13 ---- Space 14 ---- Shaft body 141 --- Shaft body bearing 15 ---- Opening portion 16 --- -Annular part 161 --- Teflon oil seal 17 ---- plate 171 --- rubber packing 172 --- screw 2 ----- cam 21 ---- central rotating body 22 ---- eccentric rotation Body 24 ---- Bearing 25 ---- Outer fitting ring 26 ---- Extension body 27 ---- Piston 3 ----- Cylinder 31 ---- Hollow chamber 4 ----- Valve 41 ---- Inlet 42 ---- Outlet 5 ----- Cam 51 ---- Central rotating body 511 --- Fitting groove 512 --- Screw hole 52 ---- Eccentric rotating body 53-- --- Shaft hole 54 ---- Bearing 55 ---- Outer fitting ring 56 ----- Extension body 57 ----- Piston 58 ----- Weight 5 1 --- fitted bone 582 --- through hole 583 --- screws

Claims (10)

A main body that is attached to a motor having a shaft body at an output end, has a space for inserting a shaft body of a motor for fitting into a cam, and has an opening on a side surface;
It has one central rotating body and two eccentric rotating bodies, each eccentric rotating body is connected to the piston, the central axis of the cam passes through the shaft hole, the shaft body is passed through the shaft hole, The eccentric rotating body has a cam located at a non-central location,
A cam pump for a refrigerant recovery machine, comprising: a cylinder attached to an opening portion of the main body and having a hollow chamber in which a piston for reciprocating movement is disposed.     The main body has a housing shape, a fan is connected to the outside of the motor, and an annular portion is provided at the outer edge of the space of the main body. The annular portion is engaged with a Teflon oil seal and a rubber packing with a screw. The cam type pump for a refrigerant recovery machine according to claim 1, wherein the plate body is covered.     The cam type pump for a refrigerant recovery machine according to claim 1, wherein a shaft body bearing is provided at an end of the shaft body.     The cam type pump for a refrigerant recovery machine according to claim 1, wherein the two eccentric rotating bodies of the cam are provided on both sides of the central rotating body.     A bearing is fitted to the outside of the eccentric rotating body, an outer fitting ring is further attached to the outside of the bearing, and a piston is connected to an end of the extending body provided at one end of the outer fitting ring. The cam type pump for refrigerant recovery machines according to claim 1.     The cam type pump for a refrigerant recovery machine according to claim 1, wherein the shaft hole is located at a central portion of the central rotating body.     The cam type pump for a refrigerant recovery machine according to claim 1, wherein a valve is attached to the outside of the cylinder, and an inlet and an outlet are installed in the valve so as to be connected to the inside of the cylinder and the inside of the valve.     The cam type pump for a refrigerant recovery machine according to claim 1, wherein the centers of the two eccentric rotating bodies are located on different axes.     The cam type pump for a refrigerant recovery machine according to claim 1, wherein the centers of the two eccentric rotating bodies are located on the same axis.     A weight is attached to a side surface of the central rotating body, and the weight is provided at a corresponding end of the central rotating body corresponding to a biased portion of the eccentric rotating body. 10. The cam type for a refrigerant recovery machine according to claim 9, wherein a screw hole is drilled, a weight insertion bone is fitted in the insertion groove, and the weight is attached to the central rotating body through a screw through a through hole formed in the weight. pump.