An oil passage throttling device of a compressor, a compressor and an air conditioner

Abstract

The application provides an oil path throttling device of a compressor, a compressor and an air conditioner. The oil path throttling device of the compressor comprises a main supporting seat, a first throttling channel and a throttling mechanism. The first throttling channel is arranged on the main supporting seat to enable oil to flow. The throttling mechanism is arranged in the first throttling channel. The throttling mechanism can control the change of throttling size according to the rotating speed of the rotating shaft of the compressor, and further control the change of the pressure of the oil. According to the application, the throttling capacity of the throttling mechanism is automatically adjusted according to the rotating speed. The throttling capacity is weakened when the compressor operates at high frequency to avoid excessive back pressure. The throttling capacity is strengthened when the compressor operates at low frequency to avoid energy efficiency reduction. Therefore, the problems of excessive compression pressure of the dynamic and static vortex discs and the overturning of the dynamic disc can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to an oil passage throttling device of a compressor, a compressor and an air conditioner. BACKGROUND

[0002] The scroll compressor has the characteristics of simple structure, small volume, light weight, low noise, high mechanical efficiency and stable operation. In the high back pressure scroll compressor, a static scroll plate and a dynamic scroll plate are installed. The dynamic scroll plate rotates by one side fitting with the static scroll plate to compress the fluid. The fluid is compressed to generate a force acting on the scroll plate, which has a tendency to overturn the dynamic scroll plate, thereby reducing the compression efficiency. In order to offset the influence of the force, a back pressure is introduced to the back of the dynamic scroll plate, so that the dynamic scroll plate is tightly pressed on the static scroll plate. If the back pressure is too large, it will generate a large friction loss during the operation of the dynamic scroll plate, thereby reducing the compression efficiency. Therefore, a passage is usually provided in the inner part of the upper support seat to introduce lubricating oil to the end surface of the pump body. The high pressure oil is introduced to the end surface of the pump body, which can offset a part of the back pressure of the pump body, and fill the gap between the pump body for lubrication and sealing. In order to control the amount and pressure of the introduced oil, a throttling mechanism is usually provided in the oil introduction passage. However, when the throttling mechanism has a strong throttling effect, the compression force is usually too large during high frequency operation of the compressor. When the throttling effect of the throttling mechanism is weak, a large amount of lubricating oil may flow into the pump body when the dynamic scroll plate overturns during low frequency operation of the compressor, which greatly affects the energy efficiency of the compressor.

[0003] Due to the technical problems such as the scroll compressor in the prior art has a throttling mechanism in the oil introduction passage, when the throttling mechanism has a strong throttling effect, the compression force is usually too large during high frequency operation of the compressor, and when the throttling effect of the throttling mechanism is weak, a large amount of lubricating oil may flow into the pump body when the dynamic scroll plate overturns during low frequency operation of the compressor, which greatly affects the energy efficiency of the compressor, the present application researches and designs an oil passage throttling device of a compressor, a compressor and an air conditioner. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to overcome the problems that the scroll compressor in the prior art cannot automatically adjust the throttling degree of the oil introduction passage, cannot simultaneously solve the problems of excessive compression force of the dynamic and static scroll plates, and the defect of the dynamic plate overturning, thereby providing an oil passage throttling device of a compressor, a compressor and an air conditioner.

[0005] In order to solve the above problems, the present application provides an oil passage throttling device of a compressor, which comprises:

[0006] The main bearing seat, the first throttling channel and the throttling mechanism, the first throttling channel is arranged on the main bearing seat to enable oil to flow, the throttling mechanism is arranged in the first throttelling channel, the throttling mechanism can control the change of throttling size according to the rotating speed of the rotating shaft of the compressor, and then control the change of the pressure of the oil.

[0007] In some embodiments, when the rotating speed of the rotating shaft of the compressor is greater than the first preset rotating speed, i.e., the operating frequency of the compressor is greater than the first preset frequency, the throttling mechanism can reduce the throttling effect on the oil, and increase the amount of oil entering the compression cavity of the pump body; when the rotating speed of the rotating shaft of the compressor is less than the second preset rotating speed, i.e., the operating frequency of the compressor is less than the second preset frequency, the throttling mechanism can increase the throttling effect on the oil, and reduce the amount of oil entering the compression cavity of the pump body; wherein the first preset rotating speed is greater than or equal to the second preset rotating speed, and the first preset frequency is greater than or equal to the second preset frequency.

[0008] In some embodiments, the throttling mechanism comprises a fixed part and a moving part, a flow channel is formed on the fixed part and / or the moving part, the moving part can move relative to the fixed part to change the flow area of the flow channel and / or change the length of the flow channel, and the movement of the moving part can change according to the rotating speed of the rotating shaft of the compressor.

[0009] In some embodiments, the throttling mechanism further comprises a first elastic adjusting part, the first elastic adjusting part is located between the moving part and the fixed part, and the flow area of the flow channel between the moving part and the fixed part can be changed by pressing the first elastic adjusting part through the movement of the moving part.

[0010] In some embodiments, the moving part is a cylindrical structure, a helical first channel is formed on the surface of the moving part, one end of the first throttling channel is opposite to the back pressure cavity of the compressor, and the other end is a blocked end, the moving part can reciprocate in the first throttling channel, and a second throttling channel is further arranged on the main bearing seat, one end of the second throttling channel is connected with the first throttling channel and can communicate with the first channel.

[0011] In some embodiments, the fixed part is also a helical structure and matches the helix of the first channel, the fixed part is arranged in the first channel, and the first elastic adjusting part is also a helical structure and matches the helix of the first channel, and the first elastic adjusting part is also arranged in the first channel.

[0012] In some embodiments, the moving part comprises a head part at one axial end of the cylindrical shaft and a tail part at the other axial end, the head part is arranged relatively close to the back pressure cavity of the compressor, the tail part is arranged relatively far from the back pressure cavity of the compressor, the fixed part is fixed relative to the main bearing seat, the moving part moves relative to the main bearing seat, when the moving part moves away from the back pressure cavity, the first elastic adjusting part can be squeezed by the moving part and the fixed part to elastically deform and reduce the volume, so that the flow channel for oil flow is formed or increased between the fixed part and the moving part, and oil enters the flow channel through the head part.

[0013] In some embodiments, the moving part comprises a first blocking part and a second blocking part, an entering channel is defined between the first blocking part and the second blocking part, a second channel in a spiral shape is arranged on the fixed part, the first blocking part and the second blocking part move integrally, the position where the entering channel communicates with the second channel can be adjusted, and the change of the length of the channel in the second channel that communicates with the entering channel can be adjusted, and the part of the second channel that forms the communicating oil is the flow channel.

[0014] In some embodiments, the first blocking part is arranged relatively close to the back pressure cavity of the compressor, the second blocking part is arranged relatively far from the back pressure cavity, an intermediate communicating channel is formed between the second blocking part and the inner wall of the first throttling channel, a second throttling channel is further arranged on the main bearing seat, one end of the second throttling channel communicates with the first throttling channel, one end of the intermediate communicating channel communicates with the second throttling channel and the other end communicates with the entering channel, and the first blocking part communicates with the inner wall of the first throttling channel to seal the intermediate communicating channel.

[0015] In some embodiments, the throttling mechanism further comprises a second elastic adjusting part, the second elastic adjusting part is made of flexible material and spirally extends into the second channel of the fixed part along the extension direction of the second channel, one end of the second elastic adjusting part extends to the position where the second blocking part communicates with the entering channel, and the other end can extend out of the second channel; the second elastic adjusting part moves integrally with the moving part.

[0016] In some embodiments, the part of the second elastic adjusting part in the second channel is a diastolic segment, and the part of the second elastic adjusting part outside the second channel is a compression segment, and the compression segment is compressed by the moving part and the blocking end of the first throttling channel.

[0017] In some embodiments, one end of the second blocking part is connected to one end of the second elastic adjusting part in the second channel, the second elastic adjusting part can adjust the length of the second elastic adjusting part extending into the second channel according to the rotating speed of the compressor, and then drive the movement position of the second blocking part to move spirally along the second channel, so as to adjust the length of the flow channel.

[0018] In some embodiments, the throttle mechanism further comprises a third elastic adjusting part, the third elastic adjusting part is filled with a fluid, the fluid can be filled into the second channel, one end of the fluid in the second channel is provided with a third blocking part, the third blocking part can block the fluid, and the third blocking part can slide along the spiral direction of the second channel; one end of the second blocking part is connected to the third blocking part, and the fluid moves along the second channel to drive the third blocking part to move along the second channel, so as to further drive the second blocking part to move spirally.

[0019] In some embodiments, a pressure adjusting mechanism is further included, the pressure adjusting mechanism is in communication with the fluid to provide pressure to the fluid or recycle the fluid into the pressure adjusting mechanism, the pressure adjusting mechanism can adjust the pressure according to the rotating speed of the compressor, so as to control the length of the fluid occupying the fluid channel, and thus adjust the throttling capacity of the throttle mechanism.

[0020] The present application further provides a compressor comprising the oil passage throttling device of any one of the preceding compressor, further comprising a crankshaft assembly and a pump body assembly, the crankshaft assembly and the main bearing block form a back pressure cavity, and the oil in the back pressure cavity can be guided to the compression cavity of the pump body assembly through the first throttling channel and the throttle mechanism.

[0021] In some embodiments, the compressor is a scroll compressor, the pump body assembly comprises a static scroll assembly and a dynamic scroll assembly, and the static scroll assembly and the dynamic scroll assembly form the compression cavity.

[0022] The present application further provides an air conditioner comprising the compressor.

[0023] The oil passage throttling device of the compressor, the compressor and the air conditioner provided by the present application have the following beneficial effects:

[0024] 1. The present application can automatically adjust the throttling capacity of the first throttling channel according to the rotating speed of the rotating shaft of the compressor, control the change of the oil pressure, provide sufficient lubricating oil to ensure the balance of back pressure and lubrication when the compressor operates at high speed, and control the amount of lubricating oil when the compressor operates at low speed to avoid affecting the energy efficiency; by automatically adjusting the throttling capacity of the throttling mechanism through the rotating speed, the throttling capacity is weakened at high frequency to avoid excessive back pressure, and the throttling capacity is strengthened at low frequency to avoid energy efficiency reduction, so that the problems of excessive pressure of the dynamic and static scroll and the overturning of the dynamic scroll can be solved.

[0025] 2. The throttling mechanism of the present application has a fixed part, a moving part, and an elastic adjusting part, the elastic adjusting part can adjust the fluid channel between the fixed part and the moving part by adjusting its shape under the action of the moving part, forming the change of the area of the channel and / or the change of the length of the channel, and effectively adjusting the size of the oil pressure; the action of the moving part can be controlled by mechanical structure, or by electric control valve or pressure difference structure. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the whole structure of the scroll compressor of the present application;

[0027] Figure 2 It is a schematic diagram of the structure of the throttling mechanism of embodiment one of the present application;

[0028] Figure 3 It is a schematic diagram of the structure of each part of the throttling mechanism of embodiment one of the present application;

[0029] Figure 4 It is a schematic diagram of the relationship between the oil flow of the throttling mechanism and the rotating speed of the compressor of the present application;

[0030] Figure 5a It is a schematic diagram of the structure of the throttling mechanism of embodiment one of the present application in closed state;

[0031] Figure 5b It is a schematic diagram of the structure of the throttling mechanism of embodiment one of the present application in open state;

[0032] Figure 5c It is a schematic diagram of the cross-sectional structure of the throttling mechanism of embodiment one of the present application in open state;

[0033] Figure 6 It is a schematic diagram of the structure of the throttling mechanism of embodiment two of the present application (only fixed part and rubber part);

[0034] Figure 7 It is a schematic diagram of the cross-sectional structure of the throttling mechanism of embodiment two of the present application;

[0035] Figure 8 Figure 3 is a schematic view of a throttling mechanism structure of an embodiment of the present application.

[0036] Reference signs are shown as follows:

[0037] 01, housing assembly; 02, static scroll assembly; 03, dynamic scroll assembly; 04, anti-rotation mechanism; 05, main bearing seat; 06, crankshaft assembly; 07, rotor assembly; 08, motor assembly; 09, auxiliary bearing seat; 10, oil pump; 051, throttling mechanism; 051a, moving part; 051b, fixed part; 051c, first elastic adjusting part; 051f, second elastic adjusting part; 051d, third blocking part; 051e, third elastic adjusting part; 0511, head part; 0512, tail part; 0513, first blocking part; 0514, second blocking part; 0515, relaxation section; 0516, compression section; 11, first throttling passage; 12, flow passage; 13, first passage; 14, back pressure cavity; 15, second throttling passage; 16, inlet passage; 17, second passage; 18, intermediate communication passage; 19, pressure regulating mechanism. DETAILED DESCRIPTION

[0038] As Figures 1-8 , the present application provides an oil passage throttling device of a compressor, which comprises:

[0039] The main bearing seat 05, the first throttling passage 11 arranged on the main bearing seat 05 to enable oil to flow through, and the throttling mechanism 051 arranged in the first throttling passage 11, wherein the throttling mechanism 051 can control the change of throttling size according to the rotational speed of the rotating shaft of the compressor, thereby controlling the change of the pressure of the oil.

[0040] The present application can automatically adjust the throttling capacity of the throttling mechanism according to the rotational speed of the rotating shaft of the compressor, thereby controlling the change of the pressure of the oil, providing sufficient lubricating oil to ensure the balance of back pressure and lubrication when the compressor is running at high speed, and controlling the amount of lubricating oil supplied when the compressor is running at low speed to avoid affecting the energy efficiency. The throttling capacity of the throttling mechanism is automatically adjusted by the rotational speed, the throttling capacity is weakened to avoid excessive back pressure when running at high frequency, and the throttling capacity is strengthened to avoid a decrease in energy efficiency when running at low frequency, so that the problems of excessive compression force of the dynamic and static scroll and the overturning of the dynamic scroll can be solved.

[0041] In some embodiments, when the rotating speed of the rotating shaft of the compressor is greater than a first preset rotating speed, i.e., the operating frequency of the compressor is greater than a first preset frequency, the throttling mechanism 051 can reduce the throttling effect on the oil and increase the amount of oil entering the compression cavity of the pump body; when the rotating speed of the rotating shaft of the compressor is less than a second preset rotating speed, i.e., the operating frequency of the compressor is less than a second preset frequency, the throttling mechanism 051 can increase the throttling effect on the oil and reduce the amount of oil entering the compression cavity of the pump body; wherein the first preset rotating speed is greater than or equal to the second preset rotating speed, and the first preset frequency is greater than or equal to the second preset frequency. The present application proposes a new type of compressor throttling mechanism, which is arranged in the upper bearing seat and can automatically adjust its throttling capacity according to the rotating speed of the compressor. When the compressor operates at high speed, sufficient lubricating oil is provided to ensure the balance of back pressure and lubrication (the degree of wear is more obvious at high frequency, and at this time, more amount of lubricating oil is introduced to reduce the back pressure and compression force), and when the compressor operates at low speed, the amount of lubricating oil is controlled (if the oil pressure is too large at low frequency, it will cause overturning, so the amount of oil needs to be reduced), so as to avoid affecting the energy efficiency.

[0042] As Figure 1As shown, the scroll compressor mainly consists of a shell assembly 01, a static scroll assembly 02, a dynamic scroll assembly 03, an anti-rotation mechanism 04, a main support seat 05, a crankshaft assembly 06, a rotor assembly 07, a motor assembly 08, a secondary support seat 09, an oil pump 10 and the like. The motor assembly 08 is fixed in the middle of the shell 01, the main support seat 05 is located on the same side of the compressor mechanism as the motor 08, used to support the compressor mechanism, and the secondary support seat 09 is located on the other side of the motor. The static scroll assembly 02 and the dynamic scroll assembly 03 are oppositely installed on the main support seat 05 with a phase angle difference of 180°, the dynamic scroll assembly 03 moves under the drive of the crankshaft assembly 06, and moves in translation around the center of the crankshaft with a fixed radius under the restriction of the anti-rotation mechanism 04, and engages with the static scroll to form a series of crescent-shaped closed cavities that are isolated from each other and have continuous volume changes. When the compressor is running, the rotor assembly 07 drives the crankshaft 06 to rotate, driving the dynamic scroll assembly 03 to move, and the refrigerant entering from the outside of the compressor is sucked into the crescent-shaped suction cavity formed by the dynamic scroll assembly 03 and the static scroll assembly 02, and is discharged into the shell through the exhaust hole on the static scroll assembly 02 after compression, and then is discharged from the compressor through the exhaust pipe. The bottom of the compressor is an oil pool space for containing lubricating oil in the compressor, and the oil pump 10 is installed at the lower end of the compressor crankshaft for pumping lubricating oil accumulated in the oil pool to lubricate and cool the compressor bearings, pump body and other parts. When the compressor is running, the dynamic scroll rotates on one side while engaging with the static scroll to compress the fluid, and the fluid is compressed to generate a force acting on the scroll, which has a tendency to overturn the dynamic scroll, thereby causing leakage and reducing compression efficiency. In order to offset the influence of the force, a back pressure is usually introduced on the back of the dynamic scroll to make the dynamic scroll tightly press on the static scroll. If the back pressure is too large, it will generate a large friction loss during the operation of the dynamic scroll, reducing the compression efficiency. Therefore, a passage is usually provided in the upper support seat to introduce lubricating oil to the end face of the pump body, which can offset a part of the back pressure of the pump body, and on the other hand, the lubricating oil fills the gap between the pump body for lubrication and sealing. In order to control the amount and pressure of the introduced oil, a throttling mechanism is usually provided in the oil introduction passage. However, when the throttling mechanism has a strong throttling effect, the compression force is usually too large when the compressor is running at high frequency, and when the throttling effect of the throttling mechanism is weak, a large amount of lubricating oil may flow into the pump body when the compressor is running at low frequency, which greatly affects the energy efficiency of the compressor.

[0043] The present application provides a new type of compressor throttling mechanism, which is arranged in the upper support seat and can automatically adjust the throttling capacity according to the speed of the compressor. When the compressor is running at high speed, sufficient lubricating oil is provided to balance the back pressure and lubrication, and when the compressor is running at low speed, the amount of lubricating oil is controlled to avoid affecting the energy efficiency.

[0044] In some embodiments, the throttling mechanism 051 of embodiments one, two and three comprises a fixed part 051b and a moving part 051a, a flow passage 12 is formed on the fixed part 051b and / or the moving part 051a, the moving part 051a is capable of moving relative to the fixed part 051b to change the flow area of the flow passage 12 and / or change the length of the flow passage 12, and the movement of the moving part 051a can be changed according to the speed of the rotating shaft of the compressor. This is the preferred structure of the throttling mechanism of the present application, i.e. the structure comprising a fixed part and a moving part, and a flow passage is formed on the fixed part and / or the moving part to change the length or area of the flow passage by the movement of the moving part, which can effectively change the oil intake, thereby changing the oil pressure, and the movement of the moving part of the present application can be changed according to the speed of the rotating shaft, which can adjust the throttling pressure according to the speed, thereby adjusting the oil pressure, and can provide sufficient lubricating oil to ensure the balance of back pressure and lubrication when the compressor is running at high speed, and can control the supply of lubricating oil when the compressor is running at low speed, thereby avoiding the effect of affecting the energy efficiency.

[0045] In some embodiments, the throttling mechanism 051 of embodiment one comprises a fixed part 051b and a moving part 051a, a flow passage 12 is formed on the fixed part 051b and / or the moving part 051a, the moving part 051a is capable of moving relative to the fixed part 051b to change the flow area of the flow passage 12 and / or change the length of the flow passage 12, and the movement of the moving part 051a can be changed according to the speed of the rotating shaft of the compressor. This is the preferred structure of the throttling mechanism of the present application, i.e. the structure comprising a fixed part and a moving part, and a flow passage is formed on the fixed part and / or the moving part to change the length or area of the flow passage by the movement of the moving part, which can effectively change the oil intake, thereby changing the oil pressure, and the movement of the moving part of the present application can be changed according to the speed of the rotating shaft, which can adjust the throttling pressure according to the speed, thereby adjusting the oil pressure, and can provide sufficient lubricating oil to ensure the balance of back pressure and lubrication when the compressor is running at high speed, and can control the supply of lubricating oil when the compressor is running at low speed, thereby avoiding the effect of affecting the energy efficiency. Figure 2 、 3 In some embodiments, the throttling mechanism 051 of embodiments one, two and three comprises a fixed part 051b and a moving part 051a, a flow passage 12 is formed on the fixed part 051b and / or the moving part 051a, the moving part 051a is capable of moving relative to the fixed part 051b to change the flow area of the flow passage 12 and / or change the length of the flow passage 12, and the movement of the moving part 051a can be changed according to the speed of the rotating shaft of the compressor. This is the preferred structure of the throttling mechanism of the present application, i.e. the structure comprising a fixed part and a moving part, and a flow passage is formed on the fixed part and / or the moving part to change the length or area of the flow passage by the movement of the moving part, which can effectively change the oil intake, thereby changing the oil pressure, and the movement of the moving part of the present application can be changed according to the speed of the rotating shaft, which can adjust the throttling pressure according to the speed, thereby adjusting the oil pressure, and can provide sufficient lubricating oil to ensure the balance of back pressure and lubrication when the compressor is running at high speed, and can control the supply of lubricating oil when the compressor is running at low speed, thereby avoiding the effect of affecting the energy efficiency.

[0046] In some embodiments, the moving part 051a is a cylindrical structure, a helical first channel 13 is formed on the surface of the moving part 051a, one end of the first throttling channel 11 is opposite to the back pressure cavity 14 of the compressor, and the other end is a blind end. The moving part 051a can reciprocate in the first throttling channel 11. A second throttling channel 15 is further arranged on the main bearing seat 05. One end of the second throttling channel 15 is connected with the first throttling channel 11 and can communicate with the first channel 13. This is a further preferred structure of embodiment 1 of the present application. The moving part is a cylindrical structure, a helical first channel is formed on the surface of the moving part, the first channel can form a flow channel 12, one end of the first throttling channel is connected with the back pressure cavity and can suck oil from the back pressure cavity, and the moving part reciprocates in the first throttling channel. The second throttling channel is arranged on the main bearing seat and can communicate with the first channel in the first throttling channel to suck refrigerant oil into the compression cavity of the pump body to balance the back pressure and prevent the transition wear of the moving and stationary vane plates and the overturning of the moving plate.

[0047] In some embodiments, the fixed part 051b is also a helical structure and matches the helix of the first channel 13. The fixed part 051b is arranged in the first channel. The first elastic adjusting part 051c is also a helical structure and matches the helix of the first channel 13. The first elastic adjusting part 051c is also arranged in the first channel. This is a preferred structure of the fixed part of the present application. The fixed part is a helical structure and is clamped in the helical first channel of the moving part. The first elastic adjusting part is also a helical structure and is clamped in the first channel of the moving part. The first elastic adjusting part can be squeezed by the axial movement of the moving part to generate or increase the flow area of the flow channel.

[0048] In some embodiments, the moving part 051a includes a head 0511 at one axial end of the cylindrical shaft and a tail 0512 at the other axial end, the head 0511 is relatively close to the back pressure cavity 14 of the compressor, the tail 0512 is relatively far from the back pressure cavity 14 of the compressor, the fixed part 051b is fixed relative to the main bearing seat 05, the moving part 051a moves relative to the main bearing seat 05, when the moving part 051a moves away from the back pressure cavity 14, the first elastic adjusting part 051c can be squeezed by the moving part 051a and the fixed part 051b to elastically deform and reduce the volume, so that the flow channel 12 for oil flow is formed or increased between the fixed part 051b and the moving part 051a, and oil enters the flow channel 12 through the side of the head 0511. The moving part of the application further preferably includes a head towards the back pressure cavity and a tail away from the back pressure cavity, the head of the moving part can be driven by pressure to move away from the back pressure cavity, thereby squeezing the first elastic adjusting part to increase the flow channel, moving towards the back pressure cavity can reduce the flow channel, thereby effectively controlling the flow area of the flow channel.

[0049] Now the throttle mechanism is described in detail, as shown in Figure 2 The throttle mechanism 051 is installed inside the oil supply channel. The throttle mechanism is composed of three parts, namely the moving part 051a, the fixed part 051b and the first elastic adjusting part 051c, and the detailed structure is described as shown in Figure 3 The fixed part 051b can be matched with the oil supply channel through interference or other means, and is fixed with the bearing seat; the moving part 051a has a head extending out of the oil supply channel, which is used to receive controller signals to drive the moving part to move in the axial direction relative to the oil supply channel, and a tail with a limiting key to prevent the moving part and the fixed part from being deflected relative to the angle; the first elastic adjusting part 051c can be attached to the fixed part and the moving part, and its shape can be adjusted within a certain range when subjected to external force. Figure 4 To show the relationship between the oil flow rate through the throttle mechanism and the compressor speed, when the compressor is running at low frequency, the fluid channel of the throttle mechanism is completely closed, and the oil supply is 0, when the compressor reaches a certain speed, the fluid channel is opened and increases with the increase of speed within a certain operating range, until the control limit of the adjusting part is reached, at this time the flow area of the fluid channel reaches the maximum value. The operation mechanism of the adjustable throttle mechanism is described as shown in Figure 5aAs shown, when the above components are assembled together, a complete columnar body can be formed, at this time the elastic adjusting part is fully relaxed, and the components are closely attached to each other; as Figure 5b As shown, when the rotating speed of the compressor reaches the opening rotating speed of the fluid passage, the movement part moves in the axial direction of the oil supply passage under external control, the movement can be controlled by mechanical structure, or by electrically controlled valve or pressure difference structure, at this time the movement part extrudes the elastic adjusting part to deform, and the fluid passage is generated between the movement part and the fixed part, as Figure 5c As shown, it is the sectional view of the throttling mechanism when the passage is opened, the cross-sectional area of the passage changes with the rotating speed, so as to adjust the throttling capacity at different rotating speeds.

[0050] In the second embodiment, as Figures 6-7 In some embodiments, the movement part 051a comprises a first blocking part 0513 and a second blocking part 0514, the first blocking part 0513 and the second blocking part 0514 define an entering passage 16 therebetween, the fixed part 051b is provided with a helical second passage 17, the first blocking part 0513 and the second blocking part 0514 move integrally, and can adjust the position where the entering passage 16 communicates with the second passage 17, so as to adjust the change of the length of the second passage 17 which communicates with the entering passage 16, and the part of the second passage 17 which forms the communicating oil forms the flow passage 12. In the second embodiment of the present application, the movement part forms the entering passage between the first and second blocking parts, the entering passage can communicate with the second passage on the fixed part, and the position where the entering passage communicates with the second passage can be adjusted by the axial direction movement of the movement part, as Figure 7 As shown, the movement of the movement part to the right can increase the length of the second passage, and the movement to the left can decrease the length of the second passage, so as to adjust the length of the flow passage, and further adjust the throttling degree, adjust the oil pressure in the compression chamber of the pump body, prevent the transition wear of the moving and stationary vortex discs, and prevent the overturning of the moving disc.

[0051] In some embodiments, the first blocking part 0513 is arranged relatively close to the back pressure cavity 14 of the compressor, the second blocking part 0514 is arranged relatively far from the back pressure cavity 14, and an intermediate communication passage 18 is formed between the second blocking part 0514 and the inner wall of the first throttling passage 11. The main bearing seat 05 is further provided with a second throttling passage 15, one end of the second throttling passage 15 is connected with the first throttling passage 11, one end of the intermediate communication passage 18 is communicated with the second throttling passage 15 and the other end is communicated with the inlet passage 16, and the first blocking part 0513 is connected with the inner wall of the first throttling passage 11 to seal the intermediate communication passage 18. This is a further preferred structure of the moving part of the application, the second blocking part is far from the back pressure cavity, the first blocking part is close to the back pressure cavity, the first blocking part seals the intermediate communication passage and prevents the back pressure cavity from being communicated with the intermediate communication passage, and the second blocking part effectively forms the intermediate communication passage between the inner wall of the first throttling passage to communicate with the inlet passage and the second throttling passage to guide the oil in the flow passage into the second throttling passage to achieve the oil amount condition and further adjust the oil pressure.

[0052] In some embodiments, the throttling mechanism 051 further comprises a second elastic adjusting part 051f made of flexible material, which spirally extends into the second passage 17 of the fixed part 051b along the extension direction of the second passage 17, one end of the second elastic adjusting part 051f extends to the position where the second blocking part 0514 is connected with the inlet passage 16, and the other end can extend out of the second passage 17; and the second elastic adjusting part 051f moves integrally with the moving part 051a. The second adjusting part of the second embodiment of the application can seal the part of the second passage on the right side of the inlet passage to prevent the oil from entering the part of the structure and failing to enter the second throttling passage. The second elastic adjusting part is preferably a plastic part which moves integrally with the second blocking part, and the movement of the second blocking part can be preferably adjusted by adjusting the second elastic adjusting part, the first blocking part and the second blocking part move integrally, and thus the oil pressure is effectively controlled.

[0053] In some embodiments, the part of the second elastic adjusting part 051f in the second passage 17 is a diastolic segment 0515, and the part of the second elastic adjusting part 051f outside the second passage 17 is a compression segment 0516 which is compressed by the moving part 051a and the blocking end of the first throttling passage 11. This is a further preferred structure of the second elastic adjusting part of the application, that is, the part clamped into the second passage is a diastolic segment, and the part outside the second passage is a compression segment which is compressed due to being connected with the blocking end.

[0054] In some embodiments, one end of the second blocking part 0514 is connected to one end of the second elastic adjusting part 051f in the second channel 17, and the second elastic adjusting part 051f can adjust the length of the second blocking part 0514 extending into the second channel according to the rotating speed of the compressor, so as to drive the movement position of the second blocking part 0514 moving along the second channel 17, and adjust the length of the flow channel 12. This is a further preferred structure of the second embodiment of the present application, that is, the movement of the second blocking part is driven by the rotational movement of the second elastic adjusting part, and the second blocking part moves along the spiral second channel, so as to finally realize the adjustment of the length of the flow channel according to the rotating speed of the compressor. When the rotating speed is high, the length of the flow channel is increased to increase the oil pressure and reduce the wear; when the rotating speed is low, the length of the flow channel is reduced to reduce the oil pressure and prevent the tilting of the moving scroll.

[0055] In addition to adjusting the throttling capacity by adjusting the throttling area, the throttling capacity can also be adjusted by adjusting the throttling length, such as Figure 6 As shown in the structure schematic diagram of the second alternative embodiment of the present application, the throttling capacity is mainly determined by the fixed part 051b and the second elastic adjusting part 051f, wherein the fixed part and the elastic adjusting part are spiral and can be attached to each other. Now the specific running state will be described, such as Figure 7 As shown in the cross-sectional view of the throttling mechanism, the oil supply channel is provided in the main bearing seat 05, and the throttling mechanism is installed in the oil supply channel. The throttling mechanism mainly consists of the moving part 051a, the fixed part 051b and the second elastic adjusting part 051f. The moving part 051a moves with the second elastic adjusting part 051f, and its main function is to form a fluid channel. The fixed part 051b is fixed in the upper bearing seat by interference or other means. One end of the second elastic adjusting part 051f is a diastolic segment, which is attached to the spiral groove of the fixed part. The other end is a compression segment, which is compressed and narrowed into a small segment. When receiving the rotating speed signal, the elastic adjusting part can guide the compressed segment narrowed together to the flow channel of the fixed part by rotating action, so as to change the length of the fluid channel, and thus adjust the throttling capacity of the throttling mechanism.

[0056] The third embodiment is shown in Figure 8In some embodiments, the throttling mechanism 051 further comprises a third elastic adjusting part 051e, which is filled with a filling fluid, the filling fluid being filled into the second channel 17, one end of the filling fluid in the second channel 17 being provided with a third blocking part 051d, the third blocking part 051d being capable of blocking the filling fluid, and the third blocking part 051d being capable of sliding along the spiral direction of the second channel 17; one end of the second blocking part 0514 is connected with the third blocking part 051d, and the filling fluid moves along the second channel 17 to drive the third blocking part 051d to move along the second channel, so as to further drive the second blocking part 0514 to spiral move. This is the preferred structure of the third embodiment of the present application, that is, the third elastic adjusting part is filled with a filling liquid, which can seal the part of the second channel on the right side of the inlet channel, so as to ensure that the part of the second channel on the left end is a flow channel, and the length of the filling liquid extending into the second channel is controlled to drive the second blocking part to spiral move, so as to control the length of the flow channel, realize the control of the change of the length of the flow channel according to the rotating speed of the compressor, prevent the transition wear of the moving and static vortex discs, and also prevent the overturning of the moving disc.

[0057] In some embodiments, a pressure adjusting mechanism 19 is further included, which communicates with the filling fluid to provide pressure to the filling fluid or recycle the filling fluid into the pressure adjusting mechanism 19, the pressure adjusting mechanism 19 being capable of adjusting the pressure according to the rotating speed of the compressor, so as to control the length of the fluid channel occupied by the filling fluid, thereby adjusting the throttling capacity of the throttling mechanism. This is a further preferred structure of the third embodiment of the present application, the pressure adjusting mechanism being provided to drive the filling fluid to occupy the length in the second channel by pressure, thereby controlling the integrated movement of the second blocking part and the first blocking part, and finally controlling the length change of the flow channel, the length of the flow channel being increased to increase the oil pressure and reduce the wear when the rotating speed is large, and the length of the flow channel being reduced to reduce the oil pressure to prevent the overturning of the moving vortex disc when the rotating speed is small.

[0058] As Figure 8As shown, it is the structural schematic diagram of the third alternative embodiment of the present application, and the throttling capacity is adjusted by adjusting the throttling length, and the difference from the above-mentioned embodiment is that the present application adjusts the fluid passage length by adjusting the filling volume of the filling fluid through pressure adjustment, and in addition to the same components described above, the structure further comprises a sealing slider (third blocking part 051d) and a filling fluid (third elastic adjusting part 051e), the sealing slider is installed in the fluid passage and can be displaced in the passage, thereby dividing the fluid passage into two sections; the filling fluid 051e is located at one end of the fluid passage, which is completely closed and does not flow with the external fluid, and a pressure adjusting mechanism is arranged at the receiving position thereof, so as to adjust the pressure according to the size of the compressor speed, thereby controlling the length of the fluid passage occupied by the filling fluid, so as to adjust the throttling capacity of the throttling mechanism.

[0059] The present application also provides a compressor comprising the oil passage throttling device of any one of the preceding compressor, further comprising a crankshaft assembly 06 and a pump body assembly, the crankshaft assembly and the main bearing seat 05 form a back pressure cavity 14, and the oil in the back pressure cavity 14 can be guided to the compression cavity of the pump body assembly through the first throttling passage 11 and the throttling mechanism 051.

[0060] The present application provides a scroll compressor, comprising a compression mechanism for compressing working fluid; a drive shaft for driving the compression mechanism to work; a main bearing seat located on the same side of the motor as the compression mechanism for supporting the compression mechanism, and a secondary bearing seat located on the other side of the motor; a drive shaft passing through the main and secondary bearing seats for driving the compression mechanism to compress; the drive shaft is provided with a main balance block, and a corresponding secondary balance block is arranged; characterized in that:

[0061] The compressor has an adjustable throttling mechanism, which can adjust the fluid pressure according to the speed; the throttling effect of the throttling mechanism is mainly determined by the cross-sectional area and length of the throttling passage, and under the influence of the control mechanism, the throttling mechanism can obtain different degrees of throttling effect at different speeds, reduces the oil supply at low frequency, avoids too much lubricating oil entering the pump body to affect the energy efficiency, and increases the oil supply at high frequency to ensure lubrication and balance the back pressure.

[0062] The throttling mechanism has a fixed part, a moving part, and an elastic adjusting part, and the elastic adjusting part can adjust the fluid passage between the fixed part and the moving part by adjusting its shape under the action of the moving part;

[0063] The action of the moving part can be controlled by mechanical structure, or by electrically controlled valve or pressure difference structure. The mechanism adjustment mode is related to the control mechanism used. If the control mechanism is the internal mechanical structure of the compressor using centrifugal force, the speed can be automatically adjusted. If the control mechanism is the electromagnetic mechanism using program control, the speed can be adjusted by monitoring the current and other related parameters. The pressure control is to adjust the sliding block position by pressure difference, so as to adjust the throttling length and control the throttling effect, as shown in Example 3.

[0064] In some embodiments, the compressor is a scroll compressor, the pump body assembly comprises a static scroll assembly 02 and a dynamic scroll assembly 03, and the compression cavity is formed between the static scroll assembly 02 and the dynamic scroll assembly 03.

[0065] The application also provides an air conditioner comprising the compressor described above. The novel throttling mechanism of the compressor can adjust the throttling capacity according to the speed, so that the compressor can obtain reasonable back pressure and oil supply at each speed. When the compressor operates at high speed, sufficient lubricating oil is provided to ensure the balance of back pressure and lubrication. When the compressor operates at low speed, the amount of lubricating oil is controlled to avoid affecting the energy efficiency.

[0066] The above only describes the preferred embodiments of the application and should not be used to limit the application. Any modification, equivalent replacement and improvement made within the spirit and principle of the application should be included in the protection scope of the application. The above only describes the preferred embodiments of the application and should not be used to limit the application. For ordinary skilled in the art, without departing from the technical principles of the application, a number of improvements and modifications can be made, which should be regarded as the protection scope of the application.

Claims

1. An oil circuit throttling device for a compressor, characterized in that: include: The main support (05), the first throttling channel (11), and the throttling mechanism (051) are provided on the main support (05) to allow oil to flow through. The throttling mechanism (051) is provided in the first throttling channel (11). The throttling mechanism (051) can control the change of throttling size according to the rotational speed of the compressor shaft, thereby controlling the change of the oil pressure. When the rotational speed of the compressor shaft is greater than the first preset speed, that is, when the operating frequency of the compressor is greater than the first preset frequency, the throttling mechanism (051) can reduce the throttling effect on the oil and increase the amount of oil entering the pump body compression chamber; when the rotational speed of the compressor shaft is less than the second preset speed, that is, when the operating frequency of the compressor is less than the second preset frequency, the throttling mechanism (051) can increase the throttling effect on the oil and reduce the amount of oil entering the pump body compression chamber; wherein the first preset speed is greater than or equal to the second preset speed, and the first preset frequency is greater than or equal to the second preset frequency.

2. The oil circuit throttling device for the compressor according to claim 1, characterized in that: The throttling mechanism (051) includes a fixed part (051b) and a moving part (051a). The fixed part (051b) and / or the moving part (051a) are provided with a flow channel (12). The moving part (051a) can move relative to the fixed part (051b) to change the flow area of ​​the flow channel (12) and / or change the channel length of the flow channel (12). The movement of the moving part (051a) can change according to the rotation speed of the compressor shaft.

3. The oil circuit throttling device for the compressor according to claim 2, characterized in that: The throttling mechanism (051) further includes a first elastic adjustment part (051c), which is located between the moving part (051a) and the fixed part (051b). The movement of the moving part (051a) can squeeze the first elastic adjustment part (051c) to change the flow area of ​​the flow channel (12) between the moving part (051a) and the fixed part (051b).

4. The oil circuit throttling device for the compressor according to claim 3, characterized in that: The moving part (051a) is a cylindrical structure with a spiral first channel (13) on its surface. One end of the first throttling channel (11) is opposite to the back pressure chamber (14) of the compressor, and the other end is a blocking end. The moving part (051a) can reciprocate in the first throttling channel (11). The main support (05) is also provided with a second throttling channel (15). One end of the second throttling channel (15) is connected to the first throttling channel (11) and can communicate with the first channel (13).

5. The oil circuit throttling device for the compressor according to claim 4, characterized in that: The fixing part (051b) is also a spiral structure and matches the spiral shape of the first channel (13). The fixing part (051b) is disposed in the first channel. The first elastic adjustment part (051c) is also a spiral structure and matches the spiral shape of the first channel (13). The first elastic adjustment part (051c) is also disposed in the first channel.

6. The oil circuit throttling device for the compressor according to claim 4, characterized in that: The moving part (051a) includes a head (0511) located at one end of the cylindrical axis and a tail (0512) located at the other end of the axis. The head (0511) is disposed relatively close to the back pressure chamber (14) of the compressor, and the tail (0512) is disposed relatively away from the back pressure chamber (14) of the compressor. The fixed part (051b) is fixed relative to the main support (05), and the moving part (051a) moves relative to the main support (05). When the moving part (051a) moves away from the back pressure chamber (14), the first elastic adjustment part (051c) can be squeezed by the moving part (051a) and the fixed part (051b) to undergo elastic deformation and reduce its volume, so that the fixed part (051b) and the moving part (051a) form or increase the flow channel (12) for oil supply, and oil enters the flow channel (12) through the head (0511) side.

7. The oil circuit throttling device of the compressor according to any one of claims 2-6, characterized in that: The moving part (051a) includes a first blocking part (0513) and a second blocking part (0514). An entry channel (16) is defined between the first blocking part (0513) and the second blocking part (0514). A spiral second channel (17) is provided on the fixed part (051b). The first blocking part (0513) and the second blocking part (0514) move together and can adjust the position of the entry channel (16) and the second channel (17) to adjust the change of the channel length in the second channel (17) that is connected to the entry channel (16). The spiral section of the second channel (17) that connects to the oil is the flow channel (12).

8. The oil circuit throttling device for the compressor according to claim 7, characterized in that: The first blocking part (0513) is disposed relatively close to the back pressure chamber (14) of the compressor, and the second blocking part (0514) is disposed relatively far away from the back pressure chamber (14). The second blocking part (0514) and the inner wall of the first throttling channel (11) form an intermediate connecting channel (18). The main support (05) is also provided with a second throttling channel (15). One end of the second throttling channel (15) is connected to the first throttling channel (11). One end of the intermediate connecting channel (18) is connected to the second throttling channel (15) and the other end is connected to the inlet channel (16). The first blocking part (0513) is connected to the inner wall of the first throttling channel (11) to seal the intermediate connecting channel (18).

9. The oil circuit throttling device for the compressor according to claim 7, characterized in that: The throttling mechanism (051) further includes a second elastic adjustment part (051f), which is made of a flexible material and can be spirally inserted into the second channel (17) of the fixed part (051b). One end of the second elastic adjustment part (051f) extends to the position where the second blocking part (0514) connects with the entry channel (16), and the other end can extend out of the second channel (17). The second elastic adjustment part (051f) moves integrally with the moving part (051a).

10. The oil circuit throttling device for the compressor according to claim 9, characterized in that: The portion of the second elastic adjustment part (051f) located in the second channel (17) is a relaxation section (0515), and the portion of the second elastic adjustment part (051f) located outside the second channel (17) is a compression section (0516). The compression section (0516) is compressed by the moving part (051a) and the blocking end of the first throttling channel (11).

11. The oil circuit throttling device for the compressor according to claim 9, characterized in that: One end of the second blocking part (0514) is connected to one end of the second elastic adjustment part (051f) in the second channel (17). The second elastic adjustment part (051f) can adjust its length of rotation into the second channel according to the speed of the compressor, thereby driving the second blocking part (0514) to move in a spiral motion along the second channel (17) to adjust the channel length of the flow channel (12).

12. The oil circuit throttling device for the compressor according to claim 7, characterized in that: The throttling mechanism (051) further includes a third elastic adjustment part (051e), which is a filling fluid that can fill the second channel (17). A third blocking part (051d) is provided at one end of the filling fluid in the second channel (17). The third blocking part (051d) can block the filling fluid and can slide along the spiral direction of the second channel (17). One end of the second blocking part (0514) is connected to the third blocking part (051d), and the filling fluid moves along the second channel (17), driving the third blocking part (051d) to move along the second channel, so as to further drive the second blocking part (0514) to spiral.

13. The oil circuit throttling device for the compressor according to claim 12, characterized in that: It also includes a pressure regulating mechanism (19) that is in communication with the filling fluid to provide pressure to the filling fluid or to recycle the filling fluid into the pressure regulating mechanism (19). The pressure regulating mechanism (19) can adjust the pressure according to the speed of the compressor, thereby controlling the length of the fluid passage occupied by the filling fluid, thereby adjusting the throttling capability of the throttling mechanism.

14. A compressor, characterized in that: The oil circuit throttling device of the compressor according to any one of claims 1-13 further includes a crankshaft assembly (06) and a pump body assembly, wherein a back pressure chamber (14) is formed between the crankshaft assembly and the main support (05), and the oil in the back pressure chamber (14) can be guided to the compression chamber of the pump body assembly through the first throttling channel (11) and the throttling mechanism (051).

15. The compressor according to claim 14, characterized in that: The compressor is a scroll compressor, and the pump body assembly includes a stationary scroll assembly (02) and a moving scroll assembly (03), with the compression chamber formed between the stationary scroll assembly (02) and the moving scroll assembly (03).

16. An air conditioner, characterized in that: Includes the compressor described in claim 14 or 15.

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