An oil baffle cap assembly and a rotary compressor

Abstract

The present invention provides an oil baffle cap assembly, which is applied to a rotary compressor and includes a first oil baffle cap, a second oil baffle cap and a gravity member. The second oil baffle cap is composed of a plurality of sub-oil baffle caps. The gravity member is located between the first oil baffle cap and the second oil baffle cap and can move freely relative to the first oil baffle cap, which can separate the refrigerant and the refrigerating oil in the upward airflow in the upper cavity of the rotary compressor. The refrigerant is discharged to the exhaust port, and the refrigerating oil is retained in the compressor, reducing the oil content rate of the compressor and achieving the improvement of the heat exchange efficiency of the air conditioner and the enhancement of the air conditioner performance.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly to an oil baffle component and a rotary compressor. Background Art

[0002] The performance of an air-conditioning system is greatly affected by the heat exchange effect of the air-conditioning system. To improve the heat exchange efficiency of the air-conditioning system, it is mainly necessary to reduce the oil content in the air-conditioning circulation system, mainly to reduce the oil content rate of the compressor. There are two ways to reduce the oil content rate, namely gravity and centrifugal force. Currently, for variable-frequency compressors, the operating frequency is between 10 - 200 Hz. When operating at 10 Hz, since the compressor runs slowly, the oil content rate is low. When operating at a high frequency of 150 Hz, since the compressor runs fast and the oil pumping capacity of the pump body is strong, the oil content rate is high, resulting in poor heat exchange effect in the air-conditioning circulation, increasing the work done by the oil circulation. The existing oil baffle can only achieve one angle and cannot take into account each frequency. As a result, there is often too much oil content in the air-conditioning system, leading to insufficient lubrication of the pump body structure of the compressor. Seriously, when the air-conditioner discharges gas, oil spraying occurs, accompanied by poor heat exchange effect, increased work done by the oil circulation, and low energy efficiency of the air-conditioner. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to avoid the deficiencies in the prior art and provide an oil baffle component. This oil baffle component can separate the refrigerant and the refrigerating oil in the upward air flow in the upper cavity of the rotary compressor. The refrigerant is discharged towards the exhaust port, and the refrigerating oil remains in the compressor, reducing the oil content rate of the compressor, achieving the improvement of the heat exchange efficiency of the air-conditioner and the enhancement of the air-conditioning performance.

[0004] An embodiment of the present invention provides an oil baffle component applied to a rotary compressor, including a first oil baffle, a second oil baffle, and a gravity member. The second oil baffle is composed of a plurality of sub-oil baffles. The gravity member is located between the first oil baffle and the second oil baffle and can move freely relative to the first oil baffle.

[0005] Further, the first oil baffle is sleeved on the second oil baffle. A chute channel is fixed at one end of the first oil baffle relative to the second oil baffle. A moving cavity for controlling the moving angle of the gravity member is formed between the first oil baffle and the second oil baffle through the chute channel. The gravity member is located in the moving cavity and can move freely in the moving cavity.

[0006] Further, the opening direction of the chute channel is opposite to the rotation direction of the first oil baffle.

[0007] Further, three sub-oil baffles are provided, and any two sub-oil baffles can move relatively up and down. The three sub-oil baffles are fixed to each other end to end and form a second oil baffle with the same outer diameter as the first oil baffle.

[0008] Further, a plurality of chute channels are provided, and each of the single chute channels is correspondingly arranged with a single sub-oil baffle cap.

[0009] Further, the chute channels are arranged in a stepped shape.

[0010] Further, the gravity member satisfies the following mechanical conditions: ΣF = Fa - f - f0 = m * a0, where Fa is the force of the centrifugal force F of the gravity member along the inclined surface of the second oil baffle cap, ΣF is the resultant force received by the gravity member, Fa is the decomposed force of the centrifugal force, f is the decomposed force of the gravity received by the gravity member, f0 is the frictional force received by the gravity member, m is the mass of the gravity member, and a0 is the resultant acceleration;

[0011] The centrifugal force F of the gravity member satisfies the following conditions: F = m * w^2 * R, where w is the rotational acceleration of the rotor, m is the mass of the gravity member, and R is the distance from the centroid of the gravity member to the rotation axis.

[0012] Further, a plurality of gravity members are provided, and the gravity members are any one of spherical, square or rectangular shapes.

[0013] Further, the equivalent diameter of the gravity member is smaller than the spacing of the chute channels.

[0014] An embodiment of the present invention further provides a rotary compressor, including a compressor body, a motor rotor, and the above-mentioned oil baffle cap assembly. The motor rotor is fixed in the compressor body, and the oil baffle cap assembly is fixed on the motor rotor.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Since there are a first oil baffle cap, a second oil baffle cap, and a gravity ball, among which, a plurality of chute channels are provided on the first oil baffle cap, the second oil baffle cap is composed of a plurality of sub-oil baffle caps, a moving cavity is formed between the chute channels and the second oil baffle cap, the gravity member is located in the moving cavity, and the movement trajectory of the gravity member can be realized by limiting the gravity member through the moving cavity. Furthermore, the centrifugal force of the gravity member can be controlled to overcome the friction and move outward by using the speed change of the rotary compressor, so as to realize the separate multi-angle and multi-position changes of the oil baffle cap assembly. At the same time, the opening angle of the second oil baffle cap is controlled by the gravity of the gravity member, so as to realize the flipping of the oil baffle cap assembly, easily complete the oil-gas separation, the refrigerant is discharged to the exhaust port, and the refrigerant oil droplets are retained in the compressor, reducing the oil content rate of the compressor, achieving the improvement of the air-conditioning heat exchange efficiency, and improving the air-conditioning performance. Description of the Drawings

[0016] The present invention is further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation to the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the following drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the overall structure of an oil baffle cap assembly of the present invention.

[0018] Figure 2 It is a sectional view of an oil baffle cap assembly of the present invention.

[0019] Figure 3 It is a bottom view of the first oil baffle cap in the present invention.

[0020] Figure 4 It is a front view of the first oil baffle cap in the present invention.

[0021] Figure 5 It is a three-dimensional view of the second oil baffle cap in the present invention.

[0022] Figure 6 It is a schematic diagram of the overall structure of a rotary compressor of the present invention.

[0023] Figure 7 is Figure 6 an enlarged view of part A in

[0024] The figure includes: a first oil baffle cap 1, a second oil baffle cap 2, a gravity member 3, a chute passage 4, a moving cavity 5, a compressor body 6, and a motor rotor 7. Specific embodiments

[0025] The present invention will be further described in conjunction with the following embodiments.

[0026] Embodiment 1: An oil baffle cap assembly.

[0027] Such as Figures 1-7As shown in the figure, an oil baffle cap assembly provided by an embodiment of the present invention is applied to a rotary compressor, and includes a first oil baffle cap 1, a second oil baffle cap 2, and a gravity member 3. The first oil baffle cap 1 is sleeved on the second oil baffle cap 2. The second oil baffle cap 2 is composed of a plurality of sub-oil baffle caps 21. A chute channel 4 is fixed at one end of the first oil baffle cap 1 relative to the second oil baffle cap 2. A moving cavity 5 for controlling the moving angle of the gravity member 3 is formed between the first oil baffle cap 1 and the second oil baffle cap 2 through the chute channel 4. The gravity member 3 is located in the moving cavity 5 and can move freely in the moving cavity 5. Due to the provision of the first oil baffle cap 1, the second oil baffle cap 2, and the gravity ball 3, wherein a plurality of chute channels 4 are provided on the first oil baffle cap 1, the second oil baffle cap 2 is composed of a plurality of sub-oil baffle caps 21, a moving cavity 5 is formed between the chute channel 3 and the second oil baffle cap 2, and the gravity member 3 is located in the moving cavity 5. Furthermore, the movement trajectory of the gravity member 3 can be realized by limiting the gravity member 3 through the moving cavity 5. The centrifugal force of the gravity member 3 can be utilized to overcome friction and move outward by changing the rotational speed of the rotary compressor, so as to realize the separate multi-angle and multi-position changes of the oil baffle cap assembly, and cooperate with the gravity of the gravity member 3 to control the opening angle of the second oil baffle cap, realize the flipping of the oil baffle cap assembly, easily complete the oil-gas separation, discharge the refrigerant to the exhaust port, retain the refrigerant oil droplets in the compressor, reduce the oil content rate of the compressor, improve the heat exchange efficiency of the air conditioner, and improve the performance of the air conditioner.

[0028] In a preferred embodiment, the opening direction of the chute channel 4 is opposite to the rotation direction of the first oil baffle cap 1, so that the free movement of the gravity member 3 can be realized without detachment.

[0029] In a preferred embodiment, three sub-oil baffle caps 21 are provided, and any two sub-oil baffle caps 21 can move relatively up and down. The three sub-oil baffle caps 21 are fixed to each other end to end with glue and form a second oil baffle cap 2 having the same outer diameter as the first oil baffle cap 1.

[0030] In a preferred embodiment, a plurality of chute channels 4 are provided, and each single chute channel 4 is correspondingly arranged with each single sub-oil baffle cap 21.

[0031] In a preferred embodiment, the chute channel 4 is provided in a stepped shape.

[0032] In a preferred embodiment, the gravity member 3 satisfies the following mechanical condition: ΣF = Fa - f - f0 = m * a0, where Fa is the force of the centrifugal force F of the gravity member 3 along the inclined surface of the second-stage oil cap, ΣF is the resultant force received by the gravity member 3, Fa is the decomposed force of the centrifugal force, f is the decomposed force of the gravity received by the gravity member 3, f0 is the frictional force received by the gravity member 3, m is the mass of the gravity member 3, and a0 is the resultant acceleration. At the initial stage, the centrifugal force is dominant and moves outward in the radial direction. After the second-stage oil cap 2 is opened, affected by the combined force, it moves inward and outward. Under the action of the resultant force, the gravity member 3 moves along the direction of the flipping of the moving cavity 5 channel, realizing the front-back, up-down movement.

[0033] In a preferred embodiment, the centrifugal force F of the gravity member 3 satisfies the following condition: F = m * w^2 * R, where w is the rotational acceleration of the rotor, m is the mass of the gravity member 3, and R is the distance from the centroid of the gravity member 3 to the rotation axis. Under the action of the centrifugal force, the gravity member 3 moves outward along the baffle of the first-stage oil cap 1, and presses the second-stage oil cap 2 segments to incline downward through the gravity of the gravity member 3, thereby controlling the opening angle of the second-stage oil cap 2.

[0034] In a preferred embodiment, a plurality of the gravity members 3 are provided, and the gravity members 3 are any one of spherical, square or rectangular shapes. With the action of the plurality of gravity members 3, under the action of the first-stage oil cap 1 channel, multi-dimensional changes of the second-stage oil cap 2 can be effectively realized, the contact time when the oil-gas mixture flows through can be effectively controlled, and the oil content can be better reduced.

[0035] In a preferred embodiment, the equivalent diameter of the gravity member 3 is smaller than the spacing of the chute channels 4.

[0036] In a preferred embodiment, a plurality of mounting holes 11 for fixing the oil cap assembly are provided on the first-stage oil cap 1.

[0037] Embodiment 2: A rotary compressor.

[0038] A rotary compressor includes a compressor body 6, a motor rotor 7, and the above-mentioned oil cap assembly. The motor rotor 7 is fixed inside the compressor body 6, and the oil cap assembly is fixed on the motor rotor 7.

[0039] The beneficial effects of the present invention compared with the prior art are as follows: Since there are a first oil baffle cap, a second oil baffle cap and a gravity ball, wherein, a plurality of chute channels are provided on the first oil baffle cap, the second oil baffle cap is composed of a plurality of sub-oil baffle caps, a moving cavity is formed between the chute channels and the second oil baffle cap, the gravity member is located in the moving cavity, the movement trajectory of the gravity member can be realized by limiting the gravity member through the moving cavity, the centrifugal force of the gravity member can be controlled to overcome the friction and move outward by using the rotational speed change of the rotary compressor, so as to realize the separate multi-angle and multi-position change of the oil baffle cap assembly, and cooperate with the gravity of the gravity member to control the opening angle of the second oil baffle cap, realize the flipping of the oil baffle cap assembly, easily complete the oil-gas separation, discharge the refrigerant to the exhaust port, retain the refrigerant oil droplets in the compressor, reduce the oil content rate of the compressor, improve the heat exchange efficiency of the air conditioner, and improve the performance of the air conditioner.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An oil baffle cap assembly is applied to a rotary compressor, and is characterized in that: It includes a first oil baffle cap, a second oil baffle cap and a gravity member. The second oil baffle cap is composed of multiple sub-oil baffle caps. The gravity member is located between the first oil baffle cap and the second oil baffle cap and can move freely relative to the first oil baffle cap; The first oil baffle cap is sleeved on the second oil baffle cap. A chute channel is fixed at one end of the first oil baffle cap relative to the second oil baffle cap. A moving cavity for controlling the moving angle of the gravity member is formed between the first oil baffle cap and the second oil baffle cap through the chute channel. The gravity member is located in the moving cavity and can move freely in the moving cavity; the movement trajectory of the gravity member is realized by the limitation of the gravity member through the moving cavity. The centrifugal force of the gravity member is controlled by the change of the rotational speed of the rotary compressor to overcome the friction. The gravity member moves outwards to realize the separate multi-angle and multi-position changes of the oil baffle cap assembly. At the same time, the opening angle of the second oil baffle cap is controlled in cooperation with the gravity of the gravity member; The opening direction of the chute channel is opposite to the rotation direction of the first oil baffle cap.

2. The oil baffle cap assembly according to claim 1, characterized in that: There are three sub-oil baffle caps, and any two sub-oil baffle caps can move relatively up and down. The three sub-oil baffle caps are fixed to each other end to end and form a second oil baffle cap with the same outer diameter as the first oil baffle cap.

3. The oil baffle cap assembly according to claim 1, characterized in that: There are multiple chute channels, and each single chute channel is correspondingly arranged with each single sub-oil baffle cap.

4. The oil baffle cap assembly according to claim 1, characterized in that: The chute channel is arranged in a stepped shape.

5. The oil baffle cap assembly according to claim 1, characterized in that: The gravity member satisfies the following mechanical conditions: ΣF = Fa - f - f0 = m * a0, where Fa is the force of the centrifugal force F of the gravity member along the inclined surface of the second oil baffle cap, ΣF is the resultant force received by the gravity member, Fa is the centrifugal force decomposition force, f is the gravity decomposition force received by the gravity member, f0 is the frictional force received by the gravity member, m is the mass of the gravity member, and a0 is the resultant force acceleration; The centrifugal force F of the gravity member satisfies the following conditions: F = m * w^2 * R, where w is the angular velocity of the rotor rotation, m is the mass of the gravity member, and R is the distance from the centroid of the gravity member to the rotation axis.

6. The oil baffle cap assembly according to claim 1, characterized in that: There are multiple gravity members, and the gravity member is any one of spherical, square or rectangular shapes.

7. The oil baffle cap assembly according to claim 1, characterized in that: The equivalent diameter of the gravity member is smaller than the spacing of the chute channels.

8. A rotary compressor, characterized in that: It includes a compressor body, a motor rotor and the oil baffle cap assembly according to any one of claims 1-7. The motor rotor is fixed in the compressor body, and the oil baffle cap assembly is fixed on the motor rotor.

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