Compressor and air conditioner

Abstract

The present invention discloses a compressor and an air conditioner, wherein an oil circulation structure is arranged inside the compressor, wherein the oil circulation structure includes an oil storage structure and an oil supply oil circuit, and the compressor further includes: an oil pump, wherein the oil pump is arranged inside the compressor, wherein the inlet of the oil pump is connected to the oil storage structure, and the outlet of the oil pump is connected to the oil supply oil circuit. The compressor of the present invention shortens the distance between the oil supply point and the oil demand point of the compressor by arranging the oil pump inside the compressor, and when the compressor is just running, the lubricating oil can quickly fill the entire flow channel space, thereby solving the problem of delayed oil supply to the compressor; moreover, by arranging the oil pump inside the compressor, space for installing an external oil pump can be saved, and leakage due to oil circuit failure can be avoided, thereby improving the reliability of the compressor operation.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor and an air conditioner. Background Art

[0002] When the screw compressor or oil-lubricated compressor is started and running, the compressor oil needs to establish an oil film in time to lubricate and cool the bearings and rotors. Conventional compressors use pressure difference to circulate the compressor oil. Under the action of the high pressure of the high-pressure oil tank Pd, part of the compressor oil flows to the bearings, and after lubrication, it returns to the low-pressure oil tank Ps through the return oil circuit; the other part flows to the rotor, and then follows the refrigerant to the exhaust end. When the compressor is just running, it takes a certain amount of time to establish a pressure difference. This will cause a delay in the oil supply of the compressor, causing the bearings and rotors inside the compressor to run for a period of time in the absence of oil or low oil. It is easy to cause rapid wear of the bearings and rotors, reducing the life of the compressor. In addition, when the compressor operates under low pressure difference conditions, due to the small pressure difference and the pressure loss in the oil circuit, the amount of oil to lubricate the bearings is too small, which will also cause accelerated wear of the bearings and rotors and reduce the life of the compressor.

[0003] In order to solve the above problems with oil supply to screw compressors, some compressors will be equipped with an independent oil pump outside the compressor to supply oil to the compressor according to the operating conditions of the compressor. Since the external oil supply point is a certain distance away from the compressor oil demand point, when the compressor is just running, it takes a certain amount of time to fill the entire process flow channel space, resulting in a delay in the oil supply to the compressor.

[0004] Therefore, how to reduce the delay of oil supply to the compressor when the compressor is just running is a problem to be solved urgently in the art. Summary of the invention

[0005] The invention discloses a compressor and an air conditioner, which solve the problem of delayed oil supply to the compressor when the compressor is just running.

[0006] According to one aspect of the present invention, a compressor is disclosed, wherein an oil circulation structure is arranged inside the compressor, and the oil circulation structure includes an oil storage structure and an oil supply circuit. The compressor also includes: an oil pump, which is arranged inside the compressor, and the inlet of the oil pump is connected to the oil storage structure, and the outlet of the oil pump is connected to the oil supply circuit.

[0007] Furthermore, the oil pump is drivingly connected to the rotor of the compressor, and the rotor drives the oil pump to work while rotating.

[0008] Furthermore, the oil circulation structure also includes: a bypass oil circuit, one end of which is connected to the oil storage structure, the other end of which is connected to the oil supply circuit, and the oil pump is connected to the bypass oil circuit in parallel; a clutch, and the oil pump is connected to the rotor drive through the clutch.

[0009] Further, the oil pump is movably arranged, and the oil pump controls the engagement or disengagement of the clutch by moving.

[0010] Furthermore, the oil circulation structure further comprises: a driving device, the driving device is drivingly connected to the housing of the oil pump, and the driving device is used to drive the oil pump to move.

[0011] Furthermore, the driving device comprises: a hydraulic cylinder, a piston rod of the hydraulic cylinder is drivingly connected to a housing of the oil pump, and the hydraulic cylinder controls the movement of the oil pump by extending and retracting the piston rod.

[0012] Furthermore, the oil circulation structure also includes: a hydraulic pipeline, one end of which is connected to the bypass oil circuit, and the other end is connected to the hydraulic chamber inside the hydraulic cylinder, and the hydraulic pipeline is used to provide hydraulic pressure to the hydraulic chamber to drive the piston rod to extend and retract.

[0013] Furthermore, it also includes: a return spring, which is connected to the oil pump and is used to reset the clutch to engage; the hydraulic cylinder is used to control the movement of the oil pump to drive the clutch to disengage.

[0014] Furthermore, the driving device includes: a movable iron core, which is drivingly connected to the outer casing of the oil pump; an electromagnetic coil assembly, on which the movable iron core is inserted, and the electromagnetic coil assembly controls the movement of the movable iron core through magnetic force, and the movable iron core drives the oil pump to move as a whole during the movement.

[0015] Furthermore, the clutch comprises a magnetic clutch.

[0016] Furthermore, the oil pump is movably arranged on a mounting structure in the compressor, and a return spring for resetting the oil pump is arranged between the oil pump and the mounting structure.

[0017] Furthermore, the oil circulation structure also includes: a bypass oil circuit, one end of the bypass oil circuit is connected to the oil storage structure, the other end of the bypass oil circuit is connected to the oil supply circuit, and the oil pump is connected to the bypass oil circuit in parallel.

[0018] Furthermore, the oil circulation structure further comprises: a one-way valve, which is arranged on the bypass oil line and is used to prevent the lubricating oil from flowing back to the oil storage structure.

[0019] Furthermore, the oil storage structure is arranged inside the compressor.

[0020] According to a second aspect of the present invention, an air conditioner is disclosed, comprising the above-mentioned compressor.

[0021] The compressor of the present invention arranges the oil pump inside the compressor, shortening the distance between the oil supply point and the oil demand point of the compressor. When the compressor is just running, the lubricating oil can quickly fill the entire flow channel space, thereby solving the problem of delayed oil supply to the compressor; moreover, by arranging the oil pump inside the compressor, space for installing an external oil pump can be saved, and leakage due to oil circuit failure can be avoided, thereby improving the reliability of compressor operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 1 is a schematic structural diagram of an oil circulation structure of a compressor according to a first embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of the clutch engagement of the oil circulation structure of the compressor according to the second embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of the clutch separation of the oil circulation structure of the compressor according to the second embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of the oil circulation structure of the compressor according to the third embodiment of the present invention;

[0026] Figure 5 is a schematic diagram of an oil circulation structure of a compressor according to a fourth embodiment of the present invention;

[0027] Legend: 10, oil storage structure; 20, oil supply circuit; 30, oil pump; 40, rotor; 50, bypass oil circuit; 60, clutch; 70, drive device; 71, hydraulic cylinder; 72, hydraulic oil circuit; 80, return spring; 90, one-way valve. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the embodiments, but is not limited to the contents of the description.

[0029] like Figure 1 Embodiment 1 of the invention shown discloses a compressor including an oil circulation structure and an oil pump 30. Both the oil circulation structure and the oil pump 30 are arranged inside the compressor. The oil circulation structure includes an oil storage structure 10 and an oil supply oil circuit 20. The inlet of the oil pump 30 is connected to the oil storage structure 10, and the outlet of the oil pump 30 is connected to the oil supply oil circuit 20.

[0030] The compressor of the present invention arranges the oil pump 30 inside the compressor, shortening the distance between the oil supply point and the oil demand point of the compressor. When the compressor is just running, the lubricating oil can quickly fill the entire flow channel space, thereby solving the problem of delayed oil supply to the compressor. Moreover, by arranging the oil pump 30 inside the compressor, space for installing an external oil pump 30 can be saved, and leakage due to oil circuit failure can be avoided, thereby improving the reliability of the compressor operation.

[0031] It should be noted that the oil pump 30 can be driven by a self-contained motor or can share a motor with the rotor 40. The oil supply circuit 20 is used to supply oil to the rotor 40 of the compressor and the bearings of the rotor 40. The oil circulation structure also includes an oil return circuit, and the lubricating oil reaches the rotor 40 and the bearings through the oil supply circuit 20 for lubrication, and the excess lubricating oil is recovered through the oil return circuit.

[0032] In this embodiment, the oil pump 30 is connected to the rotor 40 of the compressor by driving, and the rotor 40 drives the oil pump 30 to work while rotating. In this embodiment, the oil pump 30 is connected to the rotor 40 by driving, which is equivalent to driving the oil pump 30 through the compressor motor. The start and stop of the oil pump 30 are synchronized with the rotor 40. As soon as the compressor is started, the bearing and the rotor 40 can be supplied with oil. Therefore, the compressor can be supplied with oil very timely, reducing the wear of the rotor 40 and the bearing, and increasing the service life of the compressor.

[0033] like Figure 2 and Figure 3 As shown, the present invention also discloses embodiment 2, which discloses a compressor, which has a structure basically the same as that of embodiment 1, except that the compressor also includes a bypass oil circuit 50 and a clutch 60, one end of the bypass oil circuit 50 is connected to the oil storage structure 10, and the other end of the bypass oil circuit 50 is connected to the oil supply circuit 20, and the oil pump 30 is connected in parallel with the bypass oil circuit 50; the oil pump 30 is drivingly connected to the rotor 40 through the clutch 60.

[0034] When the compressor is just started and the pressure difference has not been established, or it is in a low pressure difference working condition, the clutch 60 is engaged, the compressor rotor 40 drives the oil pump 30 to work, and the lubricating oil of the compressor enters the oil supply oil path 20 through the oil pump 30 to supply oil to the compressor bearings and the rotor 40. After the compressor has been running for a period of time, the internal pressure difference is established, and oil can be supplied through the pressure difference. At this time, the clutch 60 is disengaged and the oil pump 30 no longer works. By disengaging the clutch 60 after the pressure difference is established in the compressor, the loss of motor energy by the oil pump 30 can be avoided, and the efficiency of the compressor is effectively improved.

[0035] It should be noted that, in this embodiment, the oil pump 30 is movably arranged, and the oil pump 30 is engaged or disengaged by moving the control clutch 60. Further, the compressor also includes a driving device 70, which is drivingly connected to the housing of the oil pump 30, and the driving device 70 is used to drive the oil pump 30 to move.

[0036] In this embodiment, the driving device 70 includes a hydraulic cylinder 71, a piston rod of the hydraulic cylinder 71 is drivingly connected to the housing of the oil pump 30, and the hydraulic cylinder 71 controls the movement of the oil pump 30 by extending and retracting the piston rod. By providing the hydraulic cylinder 71, the oil pump 30 can be driven to move by the piston rod, thereby realizing the engagement and disengagement of the clutch 60.

[0037] It should be noted that the oil circulation structure also includes a hydraulic pipeline and a return spring 80. One end of the hydraulic pipeline is connected to the bypass oil circuit 50, and the other end is connected to the hydraulic chamber inside the hydraulic cylinder 71. The hydraulic pipeline is used to provide hydraulic pressure to the hydraulic chamber to drive the piston rod to extend and retract. Figure 2 and Figure 3 As shown, the piston divides the hydraulic cylinder 71 into two parts, the right part of the piston is the hydraulic chamber, and the hydraulic oil circuit 72 is connected to the hydraulic chamber on the right side of the piston. The return spring 80 is connected to the oil pump 30, and the return spring 80 is used to reset the clutch 60 to engage; the hydraulic cylinder 71 is used to control the movement of the oil pump 30 to drive the clutch 60 to disengage. The return spring 80 is set at Figure 2 The left side of the middle oil pump 30 is used to provide a return thrust for the oil pump 30 to the right.

[0038] When the compressor is just started and the pressure difference has not been established, or it is in a low pressure difference working condition, the leftward thrust of the hydraulic cylinder 71 is less than the rightward thrust of the return spring 80. At this time, the oil pump 30 is pushed by the return spring 80, the clutch 60 is engaged, and the compressor rotor 40 drives the oil pump 30 to work. After the lubricating oil of the compressor reaches the oil supply pipeline through the oil pump 30, it supplies oil to the compressor bearings and rotor 40. As the internal pressure difference of the compressor is established, under the action of the exhaust pressure, the oil pressure of the bypass oil circuit 50 gradually increases until the thrust of the hydraulic cylinder 71 is greater than the thrust of the return spring 80, and the oil pressure can push the hydraulic cylinder 71 to move to the left. At this time, the clutch 60 is disconnected and the oil pump 30 no longer works. The lubricating oil of the compressor flows from the bypass oil circuit 50 to the oil supply circuit 20 to supply oil to the bearings and rotor 40.

[0039] It should be noted that the oil storage structure 10 includes a high-pressure oil tank Pd and a low-pressure oil tank Ps, and the oil supply process is as follows: the compressor oil is drawn from the high-pressure oil tank, and the oil is supplied to the bearing and the rotor 40 under the pumping of the oil pump 30. In order for the hydraulic cylinder 71 to work normally, an oil path needs to be drawn from the hydraulic cylinder 71 to the low-pressure oil tank.

[0040] Furthermore, in order to prevent the lubricating oil of the compressor from flowing back to the high-pressure oil tank, a one-way valve 90 needs to be installed on the bypass oil passage 50 .

[0041] exist Figure 4 In the shown embodiment three, its structure is basically the same as that of embodiment two, except that, in embodiment two, the driving device 70 includes a movable iron core and an electromagnetic coil assembly, and the movable iron core is drivingly connected to the outer casing of the oil pump 30; the movable iron core is inserted into the electromagnetic coil assembly, and the electromagnetic coil assembly controls the movement of the movable iron core by magnetic force, and the movable iron core drives the oil pump 30 to move as a whole during the movement.

[0042] When the compressor is just started and the pressure difference has not been established, or it is in a low pressure difference working condition, the electromagnetic coil assembly is not energized. At this time, the oil pump 30 is driven by the return spring 80, the clutch 60 is engaged, and the compressor rotor 40 drives the oil pump 30 to work. After the compressor's lubricating oil reaches the oil supply pipeline through the oil pump 30, it supplies oil to the compressor bearings and rotor 40. After the pressure difference inside the compressor is established, the electromagnetic coil is energized. Under the action of magnetic force, the movable iron core overcomes the elastic force of the return spring 80 and moves to the left. At this time, the clutch 60 is disconnected and the oil pump 30 no longer works. The compressor's lubricating oil flows from the bypass oil circuit 50 to the oil supply circuit 20 to supply oil to the bearings and rotor 40.

[0043] exist Figure 4 In the fourth embodiment shown, the clutch 60 comprises a magnetic clutch 60. The engagement and disengagement of the clutch 60 are directly controlled by power off or power on, thereby controlling the start and stop of the oil pump 30.

[0044] It should be noted that, in this embodiment, the oil pump 30 is movably arranged on the mounting structure in the compressor, and a return spring 80 is arranged between the oil pump 30 and the mounting structure for resetting the oil pump 30. By providing the return spring 80, the oil pump 30 can be reset to improve the reliability of the operation of the oil pump 30.

[0045] In the fifth embodiment not shown in the figure, the oil circulation structure only includes a bypass oil circuit 50, one end of the bypass oil circuit 50 is connected to the oil storage structure 10, the other end of the bypass oil circuit 50 is connected to the oil supply circuit 20, and the oil pump 30 is connected in parallel with the bypass oil circuit 50.

[0046] In this embodiment, the oil circulation structure further includes a one-way valve 90 , which is disposed on the bypass oil passage 50 to prevent the lubricating oil from flowing back into the oil storage structure 10 .

[0047] According to the sixth embodiment not shown in the figure, an air conditioner is also disclosed, including the above-mentioned compressor.

[0048] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the embodiments here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A compressor, the compressor being provided with an oil circulation structure, the oil circulation structure comprising an oil storage structure (10) and an oil supply path (20), characterized in that: Also includes: an oil pump (30), the oil pump (30) being arranged inside the compressor, the inlet of the oil pump (30) being in communication with the oil storage structure (10), and the outlet of the oil pump (30) being in communication with the oil supply passage (20); The oil pump (30) is drivingly connected to the rotor (40) of the compressor, and the rotor (40) drives the oil pump (30) to work while rotating; A bypass oil circuit (50), one end of the bypass oil circuit (50) being in communication with the oil storage structure (10), the other end of the bypass oil circuit (50) being in communication with the oil supply circuit (20), and the oil pump (30) being in communication with the bypass oil circuit (50) in parallel; A clutch (60), wherein the oil pump (30) is drivingly connected to the rotor (40) via the clutch (60); The oil pump (30) is movably arranged, and the oil pump (30) controls the clutch (60) to engage or disengage by moving; A driving device (70), the driving device (70) being drivingly connected to a housing of the oil pump (30), the driving device (70) being used to drive the oil pump (30) to move; A hydraulic cylinder (71), wherein a piston rod of the hydraulic cylinder (71) is drivingly connected to a housing of the oil pump (30), and the hydraulic cylinder (71) controls the movement of the oil pump (30) by extending and retracting the piston rod; a hydraulic pipeline (72), one end of the hydraulic pipeline (72) being in communication with the bypass oil circuit (50), and the other end of the hydraulic pipeline (72) being in communication with the hydraulic chamber inside the hydraulic cylinder (71), the hydraulic pipeline (72) being used to provide hydraulic pressure to the hydraulic chamber to drive the piston rod to extend and retract; a return spring (80), the return spring (80) being connected to the oil pump (30), the return spring (80) being used to return the clutch (60) to engagement; The hydraulic cylinder (71) is used to control the movement of the oil pump (30) to drive the clutch (60) to separate.

2. The compressor according to claim 1, characterized in that The oil circulation structure also includes: A bypass oil circuit (50), one end of the bypass oil circuit (50) being in communication with the oil storage structure (10), the other end of the bypass oil circuit (50) being in communication with the oil supply circuit (20), and the oil pump (30) being in communication with the bypass oil circuit (50) in parallel.

3. The compressor according to claim 1 or 2, characterized in that: The oil circulation structure also includes: A one-way valve (90), the one-way valve (90) being arranged on the bypass oil passage (50) and being used to prevent the lubricating oil from flowing back to the oil storage structure (10).

4. The compressor according to claim 1, characterized in that The oil storage structure (10) is arranged inside the compressor.

5. An air conditioner, characterized in that: Comprising a compressor according to any one of claims 1 to 4.

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