A rotary compressor, a gas compression system, a refrigeration system and a heat pump system

Abstract

The present application relates to a kind of rotary compressor, gas compression system, refrigeration system and heat pump system, rotary compressor includes cylinder, piston, crankshaft, swing block and sliding vane, the compression chamber and swing groove are arranged inside cylinder, piston is arranged in the compression chamber, swing block is rotationally arranged in swing groove, sliding slot is arranged on swing block, sliding vane is slidably arranged in sliding slot, and one end of sliding vane and the side wall of piston abut, the other end between the inner side wall of the cylinder is provided with the driving assembly for driving the one end of the sliding vane and the side wall of the piston abut, crankshaft is linked with piston, and drives piston to eccentric rotation in the compression chamber, swing block is synchronously swung back and forth in swing groove. By the sliding vane and the rocker block of prior art are designed as a whole, the swing amplitude of sliding vane and swing block can be greatly reduced, the friction power consumption is effectively reduced, and the cold leakage between sliding vane and piston can be reduced, the lubrication state between swing block and cylinder is improved, and the friction loss between sliding vane and cylinder is reduced.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more particularly to a rotary compressor, a gas compression system, a refrigeration system, and a heat pump system. Background Technology

[0002] The compressor mechanism mainly includes a cylinder, crankshaft, piston, and vane structure. The cylinder has a compression chamber inside, and the piston is rotatably located in the compression chamber and can rotate eccentrically around the axis of the compression chamber. The vane is slidably connected to the cylinder, and one end of the vane is connected to the outer circumferential surface of the piston. During the eccentric rotation of the piston driven by the eccentric part of the crankshaft, the piston drives the vane to reciprocate within the cylinder, thereby compressing the gas in the compression chamber.

[0003] In compressor mechanisms, the vane and piston can be either a fixed, integrated structure or a separate structure with contact contact. In an integrated structure, the relative sliding speed between the inner circumferential surface of the piston and the eccentric part of the crankshaft is relatively high, resulting in greater relative frictional power consumption. A separate structure avoids this drawback, but in a separate structure, the frictional loss between the vane end and the outer circumferential surface of the piston is greater.

[0004] To reduce this frictional loss, existing rotary compressors include a cylinder, a cam mechanism, a vane, and a rocker block. The cam portion of the cam mechanism is rotatably mounted inside the cylinder. The cylinder has a vane slot, in which the vane is mounted. The rocker block includes a first sub-rocker block and a second sub-rocker block connected together. The first sub-rocker block is hinged to the tip of the vane around a first axis parallel to the cylinder axis. The second sub-rocker block abuts against the outer surface of the cam portion. This structure can improve the lubrication between the vane tip and the outer surface of the piston, reducing frictional loss and refrigerant leakage. However, the relative sliding frictional power consumption between the upper end of the vane and the cylinder, i.e., the sidewall of the vane slot, is still relatively large, indicating room for improvement.

[0005] In addition, existing rotary compressors also use a combination of vanes and rockers. That is, the cylinder has a compression chamber and a swing groove adapted to the rocker. The vane slides through the groove of the rocker, and one end of the vane is hinged to the rocker. The other end forms a repulsive force with the cylinder through a repulsive mechanism, so that the vane has a tendency to slide towards the end where the rocker is located. The end of the rocker away from the vane abuts against the outer circumference of the piston. While this structure improves the frictional power consumption and leakage between the vane and the piston periphery, and also reduces the frictional power consumption and leakage between the vane side and the vane groove, it also increases friction and power consumption due to the added friction pair of the rocker block and the vane head hinge. Furthermore, it increases the number of parts. Because the rocker block needs to be movably connected to the hinge groove at the end of the vane, to prevent the hinged part of the rocker block head from detaching from the hinge groove and failing, the arc of the hinged ends of both the rocker block and the vane needs to be greater than 180 degrees (which cannot be achieved by grinding). This makes the manufacturing process of the rocker block very difficult, preventing mass production and increasing the cost of the compressor. At the same time, because the rocker block and the vane, as well as the rocker block and the swing groove, are both hinged, this two-point hinged structure is prone to jamming during operation, seriously affecting the reliability and stability of the compressor. Therefore, there is still room for optimization in this structure. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a rotary compressor, a gas compression system, a refrigeration system, and a heat pump system.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A rotary compressor includes a cylinder, a piston, a crankshaft, a swing block, and a sliding vane. The cylinder is provided with a compression chamber with a cylindrical structure and a swing groove with an axis parallel to the axis of the compression chamber. The piston is disposed in the compression chamber. The swing block is rotatably disposed in the swing groove. The swing block is provided with a sliding groove passing through its axis and adapted to the sliding vane. The sliding vane is slidably disposed in the sliding groove, and one end of the sliding vane abuts against the side wall of the piston. A driving assembly for driving one end of the sliding vane to abut against the side wall of the piston is provided between the other end of the sliding vane and the inner side wall of the cylinder, so that an initial pressure difference is formed between the intake chamber and the compression chamber separated by the sliding vane and the piston in the cylinder during startup. The crankshaft is linked with the piston and can drive the piston to rotate eccentrically around the central axis of the compression chamber in the compression chamber. The swing block swings back and forth synchronously in the swing groove.

[0008] Based on the above technical solution, the present invention can be further improved as follows:

[0009] Further: The sliding plate is integrally molded.

[0010] The beneficial effects of the above-mentioned further solution are: by integrally molding the sliding plate, the contact stress between the sliding plate and the outer peripheral surface of the piston can be greatly reduced. At the same time, it avoids the situation where the sliding plate and rocker block are hinged in the prior art, which is prone to jamming, and greatly improves the stability and reliability of the compressor operation.

[0011] Furthermore, the end wall of the slide that abuts against the piston is arc-shaped, and at least part of the end wall of the slide that abuts against the piston is fitted to the side wall of the piston.

[0012] The beneficial effect of the above-mentioned further solution is that by making the end wall of the slide that abuts against the piston into an arc shape, the slide and the piston can fit more tightly, greatly reducing the friction on the outer wall of the piston.

[0013] Furthermore, the end wall of the slide that abuts against the piston is planar, and the end wall of the slide that abuts against the piston is tangent to the outer side wall of the piston.

[0014] The beneficial effect of the above-mentioned further solution is that by making the end wall of the slide that abuts against the piston flat, the processing difficulty is reduced and the installation is also convenient while ensuring that the slide and the piston effectively abut against each other.

[0015] Furthermore, the driving mechanism adopts a repulsive force mechanism or an elastic force mechanism.

[0016] The beneficial effect of the above-mentioned further solution is that: by using a repulsive mechanism or an elastic mechanism, an initial pressure difference can be formed between the intake chamber and the compression chamber separated by the sliding vane and the piston in the cylinder, ensuring the normal start-up of the compressor. Further: the repulsive mechanism includes a first magnetic pole and a second magnetic pole with opposite magnetic properties. A receiving groove for accommodating the other end of the sliding vane is provided on the side of the swing groove away from the compression chamber. The first magnetic pole is disposed on the bottom wall of the receiving groove, and the second magnetic pole is disposed at the other end of the sliding vane. The length of the first magnetic pole is not less than the swing stroke of the other end of the sliding vane.

[0017] The beneficial effect of the above-mentioned further solution is that by setting a first magnetic pole and a second magnetic pole with opposite magnetic properties, the repulsive force between the first magnetic pole and the second magnetic pole with opposite magnetic properties can be used to drive one end of the slide plate to stably abut against the outer peripheral side wall of the piston, thereby making one end of the slide plate stably abut against the piston, so as to establish a stable exhaust pressure difference when the compressor starts, and improve the stability and reliability of the compressor.

[0018] Further: The elastic mechanism includes a compression spring, one end of which is connected to the other end of the slide plate, and the other end of which is connected to the inner wall of the cylinder.

[0019] The beneficial effect of the above-mentioned further solution is that the restoring force of the compression spring can drive one end of the slide to abut against the side wall of the piston, so that an initial pressure difference is formed between the intake chamber and the compression chamber formed by the slide and the piston in the cylinder, ensuring the normal start-up of the compressor.

[0020] Furthermore, the slider and the swing block are made of one of the following materials: steel, cast iron, alloy, and ceramic, and the slider is manufactured by powder metallurgy.

[0021] The present invention also provides a gas compressor system, including the rotary compressor described above.

[0022] The present invention also provides a refrigeration system, including the rotary compressor described above.

[0023] The present invention also provides a heat pump system including the rotary compressor described above.

[0024] The beneficial effects of this invention are as follows: The rotary compressor, gas compression system, refrigeration system, and heat pump system of this invention, by designing the vane and rocker block of the prior art as a whole, with one end of the vane directly abutting against the outer peripheral surface of the piston, can greatly reduce the swing amplitude of the vane and rocker block. The lubrication state changes from boundary lubrication to hydrodynamic lubrication, which effectively reduces the frictional power consumption between the vane and the piston and reduces the cold leakage between the vane and the piston. In addition, by setting the rocker block in the swing groove and driving one end of the vane to abut against the side wall of the piston through the drive mechanism, the rotation of the rocker block reduces the contact stress between the rocker block and the cylinder, thereby improving the lubrication state between the rocker block and the cylinder and reducing the frictional loss between the vane and the cylinder. Attached Figure Description

[0025] Fig. 1 This is a schematic diagram of the structure of a rotary compressor according to an embodiment of the present invention;

[0026] Fig. 2 This is a schematic diagram of the structure of a slider according to an embodiment of the present invention.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Cylinder; 2. Piston; 3. Sliding vane; 4. Swing block; 5. Repulsion mechanism; 6. Compression chamber;

[0029] 41. First pendulum block, 42. Second pendulum block, 51. First magnetic pole, 52. Second magnetic pole. Detailed Implementation

[0030] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0031] like Figs. 1-2 As shown, a rotary compressor includes a cylinder 1, a piston 2, a crankshaft, a swing block 4, and a vane 3. The cylinder 1 has a cylindrical compression chamber 6 and a swing groove with its axis parallel to the axis of the compression chamber 6. The piston 2 is disposed in the compression chamber 6. The swing block 4 is rotatably disposed in the swing groove. The swing block 4 has a groove passing through its axis and adapted to the vane 3. The vane 3 is slidably disposed in the groove, and one end of the vane 3 abuts against the side wall of the piston 2. A drive assembly is disposed between the other end of the vane 3 and the inner side wall of the cylinder 1 to drive one end of the vane 3 to abut against the side wall of the piston 2, so that an initial pressure difference is formed between the intake chamber and the compression chamber separated by the vane 3 and the piston 2 in the cylinder 1 during startup. The crankshaft is linked to the piston 2 and can drive the piston 2 to rotate eccentrically around the central axis of the compression chamber 6. The swing block 4 swings back and forth synchronously in the swing groove.

[0032] Of course, as part of the compressor, it also includes a housing, stator, rotor, main bearing, and auxiliary bearing. The stator and rotor are housed within the housing as part of the motor. The rotor is housed within the stator and can rotate under the action of electromagnetic torque. The rotation of the rotor drives the crankshaft to rotate, which in turn drives the piston 2 to rotate. The main bearing and auxiliary bearing are respectively located at the upper and lower ends of the cylinder 1 to keep the compression chamber 6 in a sealed state. This part is existing technology and will not be described in detail here.

[0033] The rotary compressor of the present invention integrates the vane and rocker block into a single unit, with one end of the vane 3 directly contacting the outer circumferential surface of the piston 2. This significantly reduces the oscillation amplitude of the vane 3 and the rocker block 4, and the lubrication state changes from boundary lubrication to hydrodynamic lubrication. This effectively reduces the frictional power consumption between the vane 3 and the piston 2 and reduces cold leakage between them. Furthermore, by setting the rocker block 4 within the oscillation groove and driving one end of the vane 3 to contact the side wall of the piston 2 through the repulsion mechanism 5, the rotation of the rocker block 4 reduces the contact stress between the rocker block 4 and the cylinder 1, thereby improving the lubrication state between them, reducing frictional loss, effectively lowering costs, and improving the reliability of the compressor.

[0034] In one or more embodiments of the present invention, the sliding vane 3 is integrally formed. By integrally forming the sliding vane 3, the contact stress between the sliding vane 3 and the outer peripheral surface of the piston 2 can be greatly reduced. At the same time, the jamming situation caused by the hinge of the sliding vane and the rocker block in the prior art is avoided, which greatly improves the stability and reliability of the compressor operation.

[0035] It should be noted that, in practice, the sliding vane can also be connected as a whole by welding, snap-fitting, locking or other methods, and the stability of the sliding vane 3 can be guaranteed during the operation of the compressor.

[0036] Optionally, in one or more embodiments of the present invention, the end wall of the slide 3 that abuts against the piston 2 is arc-shaped, and at least partially conforms to the side wall of the piston 2. By making the end wall of the slide 3 that abuts against the piston 2 arc-shaped, a tighter fit between the slide 3 and the piston 2 can be achieved, greatly reducing friction on the outer wall surface of the piston 2.

[0037] Optionally, in one or more embodiments of the present invention, the end wall of the slide 3 that abuts against the piston 2 is planar, and the end wall of the slide 3 that abuts against the piston 2 is tangential to the outer side wall of the piston 2. By making the side wall of the slide 3 that abuts against the piston 2 planar, the processing difficulty is reduced while ensuring effective contact between the slide and the piston 2, and installation is also facilitated.

[0038] In one or more embodiments of the present invention, the swing block 4 includes a first swing block 41 and a second swing block 42, which are arranged side by side at intervals and form a groove for accommodating the slider 3. Preferably, the first swing block 41 and the second swing block 42 are symmetrically arranged and are semi-cylindrical to facilitate assembly and improve operational stability.

[0039] In one or more embodiments of the present invention, the driving mechanism employs a repulsive force mechanism 5 or a spring mechanism. Employing a repulsive force mechanism 5 or a spring mechanism can drive an initial pressure difference to be formed between the intake chamber and the compression chamber within the cylinder 1, which are separated by the sliding vane 3 and the piston 2, ensuring normal startup of the compressor.

[0040] Optionally, in one or more embodiments of the present invention, the repulsion mechanism 5 includes a first magnetic pole 51 and a second magnetic pole 52 with opposite magnetic properties. A receiving groove for accommodating the other end of the sliding vane 3 is provided on the side of the swing groove away from the compression chamber 6. The first magnetic pole 51 is disposed on the bottom wall of the receiving groove, and the second magnetic pole 52 is disposed on the other end of the sliding vane 3. By providing the first magnetic pole 51 and the second magnetic pole 52 with opposite magnetic properties, the repulsive force between the first magnetic pole 51 and the second magnetic pole 52 can drive one end of the sliding vane 3 to stably abut against the outer peripheral sidewall of the piston 2, thereby ensuring stable contact between one end of the sliding vane 3 and the piston 2. This facilitates the establishment of a stable exhaust pressure differential when the compressor starts, improving the stability and reliability of the compressor.

[0041] It should be noted that the length of the first magnetic pole 51 is not less than the swing stroke of the other end of the slider 3. This ensures that a stable repulsive force is formed between the first magnetic pole 51 and the second magnetic pole 52 during the swing of the slider 3, thus ensuring the stable operation of the compressor.

[0042] Optionally, in one or more embodiments of the present invention, the elastic mechanism includes a compression spring, one end of which is connected to the other end of the slide plate 3, and the other end of which is connected to the inner wall of the cylinder 1. The restoring force of the compression spring can drive one end of the slide plate 3 to abut against the side wall of the piston 2, thereby creating an initial pressure difference between the intake chamber and the compression chamber within the cylinder 1, separated by the slide plate 3 and the piston 2, ensuring normal startup of the compressor.

[0043] Of course, in practice, the drive mechanism can also use existing micro drive motors or drive cylinders, so that when the compressor starts, the micro drive motor or drive cylinder can drive one end of the slide plate 3 to stably abut against the outer peripheral side wall of the piston 2. Existing drive components will not be listed one by one here.

[0044] In the rotary compressor of the present invention, the repulsive force between the first magnetic pole 51 and the second magnetic pole 52 is mainly used to create an initial pressure difference between the intake chamber and the compression chamber formed by the sliding vane 3 and the piston 2 in the cylinder 1 during startup. During normal operation, the high pressure in the accommodating groove (which is much greater than the repulsive force) can drive one end of the sliding vane 3 to stably abut against the outer peripheral sidewall of the piston 2.

[0045] Optionally, in one or more embodiments of the present invention, the slider 3 and the swing block 4 are made of one of the following materials: steel, cast iron, alloy and ceramic. The slider 3 is manufactured by powder metallurgy, preferably by injection molding.

[0046] The rotary compressor of the present invention effectively reduces frictional losses between the vane 3 and the piston 2, and between the vane 2 and the cylinder 1. At the same time, it eliminates the frictional pair of the rocker block and the vane head hinged in the prior art, which helps to reduce compressor energy consumption, extend compressor service life, effectively reduce costs, and improve compressor reliability.

[0047] The present invention also provides a gas compressor system, including the rotary compressor described above.

[0048] The present invention also provides a refrigeration system, including the rotary compressor described above.

[0049] The present invention also provides a heat pump system including the rotary compressor described above.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rotary compressor, characterized in that: The system includes a cylinder (1), a piston (2), a crankshaft, a rocker block (4), and a sliding vane (3). The cylinder (1) has a cylindrical compression chamber (6) and a swing groove with its axis parallel to the axis of the compression chamber (6). The piston (2) is disposed in the compression chamber (6). The rocker block (4) is rotatably disposed in the swing groove. The rocker block (4) has a sliding groove that passes through its axis and is adapted to the sliding vane (3). The sliding vane (3) is slidably disposed in the sliding groove, and one end of the sliding vane (3) abuts against the side wall of the piston (2). A drive assembly is provided between the other end of the slide (3) and the inner wall of the cylinder (1) to drive one end of the slide (3) to abut against the side wall of the piston (2), so that when starting, an initial pressure difference is formed between the intake chamber and the compression chamber separated by the slide (3) and the piston (2) in the cylinder (1). The crankshaft is linked with the piston (2) and can drive the piston (2) to rotate eccentrically around the central axis of the compression chamber (6) in the compression chamber (6). The swing block (4) swings back and forth synchronously in the swing groove.

2. The rotary compressor according to claim 1, characterized in that: The slider (3) is integrally formed.

3. The rotary compressor according to claim 2, characterized in that: The end wall of the slide (3) that abuts against the piston (2) is arc-shaped, and at least part of the end wall of the slide (3) that abuts against the piston (2) is fitted to the side wall of the piston (2).

4. The rotary compressor according to claim 2, characterized in that: The end wall of the slide (3) that abuts against the piston (2) is planar, and the end wall of the slide (3) that abuts against the piston (2) is tangent to the outer side wall of the piston (2).

5. The rotary compressor according to claim 1, characterized in that: The driving mechanism adopts a repulsive force mechanism (5) or an elastic force mechanism.

6. The rotary compressor according to claim 5, characterized in that: The repulsion mechanism (5) includes a first magnetic pole (51) and a second magnetic pole (52) with opposite magnetic properties. The side of the swing groove away from the compression chamber (6) is provided with a receiving groove for accommodating the other end of the slider (3). The first magnetic pole (51) is disposed on the bottom wall of the receiving groove, and the second magnetic pole (52) is disposed at the other end of the slider (3). The length of the first magnetic pole (51) is not less than the swing stroke of the other end of the slider (3).

7. The rotary compressor according to claim 5, characterized in that: The elastic mechanism includes a compression spring, one end of which is connected to the other end of the slide (3), and the other end of which is connected to the inner wall of the cylinder (1).

8. A gas compressor system, characterized in that: Includes the rotary compressor as described in any one of claims 1-7.

9. A refrigeration system, characterized in that, Including the rotary compressor as described in any one of claims 1-7.

10. A heat pump system, characterized in that, Including the rotary compressor as described in any one of claims 1-7.

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