A rotary compressor assembly and air conditioner

Abstract

The application provides a rotor compressor assembly and an air conditioner. The rotor compressor assembly comprises a cylinder and a suction pipe. The cylinder is provided with a suction passage. The suction pipe is communicated with the suction passage. A first check structure is arranged on the suction pipe. The first check structure can prevent the backflow of gas in the suction pipe. A second check structure is arranged on the suction passage. The second check structure can prevent the backflow of gas in the suction passage. According to the application, the backflow of suction gas can be effectively prevented in the rotor compressor. The problem of the reduction of pump volume efficiency and energy efficiency caused by the backflow of suction gas is solved. The refrigerating capacity and energy efficiency of the compressor are improved. No additional moving parts are needed, and the reliability of the structure is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressor, in particular to a rotor compressor assembly and air conditioner. BACKGROUND

[0002] In the compression process of the existing rotor compressor, the refrigerant will cause a certain degree of backflow from the second circle after the end of suction to the front edge angle β of the suction orifice, resulting in a decrease in the volumetric efficiency of the pump body, such as Figure 2 .

[0003] Among them Figure 1 Before the implementation of the present application scheme, a suction port structure of a cylinder, the suction port is a circular through hole or a through hole with a horn type / U type structure; in order to reduce the suction backflow problem, the front edge angle β of the suction orifice is generally controlled within 35°.

[0004] As Figure 3 , after the completion of the discharge of the compressor, the high-pressure gas existing in the discharge port clearance volume cannot be completely discharged, and the high-pressure gas will return to the compression chamber, and this part of the high-pressure gas will flow back to the system through the suction port, affecting the refrigerating capacity and energy efficiency of the compressor.

[0005] The compressor with enthalpy increasing structure also has the backflow problem caused by the fact that the pressure in the chamber is greater than the outlet pressure of the condenser when the enthalpy increasing port is opened.

[0006] Since the rotor compressor in the prior art has the suction backflow problem, the volumetric efficiency of the pump body and the energy efficiency are reduced, and other technical problems, therefore, the present application researches and designs a rotor compressor assembly and air conditioner. SUMMARY

[0007] Therefore, the technical problem to be solved by the present application is to overcome the defects of the rotor compressor in the prior art, which has the suction backflow problem, resulting in a decrease in the volumetric efficiency of the pump body and the energy efficiency, thereby providing a rotor compressor assembly and air conditioner.

[0008] In order to solve the above problems, the present application provides a rotor compressor assembly, which comprises:

[0009] A cylinder and a suction pipe, the cylinder is provided with a suction passage, the suction pipe is in communication with the suction passage, and a first check structure is arranged on the suction pipe, the first check structure can prevent the gas in the suction pipe from flowing back, and / or a second check structure is arranged on the suction passage, the second check structure can prevent the gas in the suction passage from flowing back.

[0010] In some embodiments, the first check structure comprises a first channel and a second channel, the opening of the first channel and the opening of the second channel are both communicated with the suction pipe, the other end of the first channel is communicated with the other end of the second channel, the opening of the first channel is opposite to the direction of the gas backflow of the suction pipe, so as to introduce the gas into the first channel, and then into the second channel and discharge into the suction pipe, and the opening of the second channel is opposite to the direction of the gas backflow of the suction pipe.

[0011] In some embodiments, the opening of the first channel is closer to the position where the suction pipe meets the cylinder than the opening of the second channel, so that the gas flow first enters the first channel through the opening of the first channel when the gas flow backflows in the suction pipe.

[0012] In some embodiments, the normal direction of the opening surface of the first channel and the central axis of the suction pipe form an angle α1, and the normal direction of the opening surface of the second channel and the central axis of the suction pipe form an angle α2, and α1<α2.

[0013] In some embodiments, the first channel and the second channel intersect and bend or curve to form a curved channel, the opening of the first channel is located at a first position where the first channel meets the suction pipe, the opening of the second channel is located at a second position where the second channel meets the suction pipe, and a hollow space is formed between the curved channel and the outer wall of the suction pipe between the first position and the second position.

[0014] In some embodiments, the second check structure comprises a third channel and a fourth channel opened on the cylinder, the third channel and the fourth channel are both communicated with the suction channel, the other end of the third channel is communicated with the other end of the fourth channel, the opening of the third channel is closer to the inside of the cylinder than the opening of the fourth channel, so that the gas flow first enters the third channel through the opening of the third channel when the gas flow backflows in the suction pipe, and then returns to the suction channel through the fourth channel, and the direction of the gas flow out of the fourth channel has a component direction, and the component direction is opposite to the backflow direction of the gas flow in the suction channel.

[0015] In some embodiments, the third channel is a cylindrical channel with a straight central axis, the fourth channel is also a cylindrical channel with a straight central axis, and the central axis of the third channel and the central axis of the fourth channel meet and bend, so that the channel composed of the third channel and the fourth channel is a bent channel.

[0016] In some embodiments, the third channel has a central axis from its opening to its end, and the direction of the central axis forms an angle B° (0

[0017] In some embodiments, 35°≤A≤80°, 15°≤B≤A.

[0018] In some embodiments, the suction pipe is a low-pressure suction pipe, which is low pressure relative to the exhaust of the rotor compressor; or the rotor compressor assembly further comprises an enthalpy-increasing pipe, and the suction pipe is the enthalpy-increasing pipe.

[0019] In some embodiments, the suction passage of the cylinder is a low-pressure suction passage, which is low pressure relative to the exhaust of the rotor compressor; or the suction passage is an enthalpy-increasing passage formed on the cylinder.

[0020] The present application also provides an air conditioner comprising the rotor compressor assembly according to any one of the preceding.

[0021] The rotor compressor assembly and the air conditioner provided by the present application have the following beneficial effects:

[0022] The present application provides a one-way check structure without moving parts, in which the fluid movement direction on the main flow passage is consistent with that on the branch flow passage in forward flow, and the fluid can smoothly pass through the structure; in reverse flow, the fluid movement direction on the main flow passage is opposite to that on the branch flow passage, and the pressure difference of the two is offset, so that the flow resistance becomes very large, and the fluid is difficult to pass through in this direction. The rotor compressor can effectively prevent suction backflow, solve the problem of reduced pump volume efficiency and energy efficiency caused by suction backflow, improve the cooling capacity and energy efficiency of the compressor, and does not need to increase moving parts, thereby improving the reliability of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A rotor compressor pump structure in the prior art;

[0024] Figure 2 A first case of backflow loss in Figure 1

[0025] Figure 3 A second case of backflow loss in Figure 1

[0026] Figure 4 ​​Front view of the rotor compressor of the embodiment one of the present application;

[0027] Figure 5 For Figure 4 Partial enlarged view of the middle A part;

[0028] Figure 6 For Figure 4 Partial enlarged view of the middle B part;

[0029] Figure 7 Schematic diagram of the working principle of the check structure of the embodiment one of the present application;

[0030] Figure 8 Pump body structure diagram of the rotor compressor of the embodiment two of the present application.

[0031] The reference signs are shown as follows:

[0032] 1, cylinder; 11, suction passage; 2, suction pipe; 3, first check structure; 31, first passage; 32, second passage; 4, second check structure; 41, third passage; 42, fourth passage; 5, hollow space; 6, distributor; 7, enthalpy increasing component. DETAILED DESCRIPTION

[0033] As Figures 4-8 , the present application provides a rotor compressor assembly, which comprises:

[0034] The cylinder 1 is provided with a suction passage 11, and the suction pipe 2 is in communication with the suction passage 11 and is provided with a first check structure 3, which can prevent the gas in the suction pipe 2 from flowing backward, and / or the suction passage 11 is provided with a second check structure 4, which can prevent the gas in the suction passage 11 from flowing backward. The check structure on the suction pipe and / or the suction passage of the cylinder can effectively prevent the suction of the cylinder from flowing backward (backflow), and a one-way check structure without moving parts is provided. When flowing forward, the flow direction on the main flow passage and the branch flow are consistent, and the fluid can smoothly pass through the structure. When flowing backward, the flow direction on the main flow passage and the branch flow are opposite, and the pressure difference of the other party is offset, so that the flow resistance becomes very large, and the fluid is difficult to pass in this direction. For the rotor compressor, the suction backflow can be effectively prevented, the problem of reducing the pump volume efficiency and energy efficiency caused by the suction backflow is solved, the cooling capacity and energy efficiency of the compressor are improved, no moving parts are needed, and the reliability of the structure is improved.

[0035] 1. The present application provides a kind of rotor compressor (mainly for the compressor), it includes distributor, pump body assembly, shell and other structures.Pump body assembly is made of upper and lower flange, cylinder, roller, sliding vane, crankshaft and other structures.Set up check structure at the suction of compressor, to prevent gas backflow.

[0036] 2. The present application adopts a kind of passive component one-way check structure, when forward flow, the fluid movement direction on main flow passage and on branch stream are consistent, fluid can smoothly pass through this structure;When reverse flow, the fluid movement direction on main flow passage and on branch stream are opposite, offset each other's pressure difference, make flow resistance become very big, fluid is difficult to pass from this direction, such as Figure 4 ;

[0037] 3. The structure of the present application is arranged on cylinder, to save cost, can choose the way of punching on cylinder and cooperating flange or partition plate.The plane where the sub-flow passage constituted by the structure is at multiple angles, preferably, it can be perpendicular to the flange plane, can be parallel to the flange plane, such as Figure 5 ;

[0038] 4. When arranging at enthalpy-increasing suction, it can be set on lower flange or other pump body structure, it can also be set in enthalpy-increasing pipe.Enthalpy-increasing compressor sets this structure can prevent the backflow of air supply to flash evaporator;

[0039] 5. This structure can also be arranged on the pipeline connected with pump body, such as pump suction pipe, shell suction pipe, air supply pipe.The closer to cylinder cavity, the smaller the backflow clearance volume;The longer the valve body, the better the check effect of one-way valve;

[0040] 6. When the structure is located on the pipeline, it can exist in multiple forms. Preferably, realize by welding sub-flow passage on pipeline to reduce processing cost. Preferably, weld relevant branch on the pipeline between distributor and pump body, such as Figure 6 .

[0041] Example one, such as Figures 4-7As shown, in some embodiments, the first check structure 3 comprises a first channel 31 and a second channel 32, the opening of the first channel 31 and the opening of the second channel 32 are both communicated with the suction pipe 2, the other end of the first channel 31 is communicated with the other end of the second channel 32, the opening of the first channel 31 is opposite to the direction of the gas backflow of the suction pipe 2, so as to be able to introduce the gas into the first channel 31, and then into the second channel 32 and be discharged into the suction pipe 2, the opening of the second channel 32 is opposite to the direction of the gas backflow of the suction pipe 2. This is the preferred structure form of the first embodiment of the present application, that is, the first check structure comprises two channels which are roughly in the form of a U-shaped structure, the first channel is used for introducing the gas flow into it, and the second channel is used for guiding the gas flow out of it and being sprayed into the suction pipe in the direction opposite to the backflow direction of the suction pipe, so as to form the kinetic energy offset of the fluid, and effectively prevent the gas from returning into the liquid separator or the enthalpy increasing component.

[0042] The rotor compressor of the present application comprises a liquid separator, a shell, a pump body and the like structures. The present application provides a check structure used on the compressor, when flowing forward, the flow direction of the inlet of the secondary flow channel is opposite to that of the main flow channel, the flow direction of the outlet of the secondary flow channel is consistent with that of the main flow channel, and the fluid can smoothly pass through this structure; when flowing reversely, the flow direction of the inlet of the secondary flow channel is consistent with that of the main flow channel, the flow direction of the outlet of the secondary flow channel is opposite to that of the main flow channel, the fluid of the main flow channel and the secondary flow channel hinder each other's flow, so that the flow resistance becomes very large, and the fluid is difficult to pass through in this direction. When the compressor compresses the refrigerant gas, due to the existence of the suction orifice leading edge angle and the existence of the remaining gas which is not completely discharged in the crescent groove, a certain gas backflow is caused, which causes the compression volume of the compressor in each compression cycle to be smaller than the cylinder volume, the refrigerating capacity of the compressor under the same speed is reduced, and the energy efficiency of the compressor is also reduced. The check structure provided by the present application is installed at the suction of the compressor to avoid such backflow.

[0043] In some embodiments, the opening of the first channel 31 is closer to the position where the suction pipe 2 is connected with the cylinder 1 than the opening of the second channel 32, so that when the gas flow backflows in the suction pipe 2, it first enters the first channel 31 through the opening of the first channel 31. The present application also sets the opening of the first channel to be closer to the cylinder than the second channel, so as to effectively make the first channel be used for introducing the backflowing gas, and the backflowing gas is discharged into the suction pipe in the direction opposite to the backflow direction of the suction pipe through the second channel, thereby effectively preventing the gas from backflowing and backflowing.

[0044] In some embodiments, the normal direction of the opening surface of the first channel 31 and the central axis of the intake pipe 2 form an angle α1, and the normal direction of the opening surface of the second channel 32 and the central axis of the intake pipe form an angle α2, with α1 < α2. This is a further preferred structural form of the embodiment of the present invention, namely, the first channel is closer to parallel to the central axis of the intake pipe, thereby allowing backflow gas from the intake pipe to more easily enter the first channel, and the second channel is used for backflow gas to enter the intake pipe.

[0045] In some embodiments, the first channel 31 and the second channel 32 intersect and bend or curve to form a curved channel. The opening of the first channel 31 is located at a first position where the first channel 31 connects to the intake pipe 2, and the opening of the second channel 32 is located at a second position where the second channel 32 connects to the intake pipe 2. A hollow space 5 is formed between the first position and the second position, and between the curved channel and the outer wall of the intake pipe 2. In the present invention, the first channel and the second channel intersect to form a curved channel, and the opening of the first channel is the first position where it connects to the intake pipe. During processing, a hole is first cut out of the first position on the intake pipe, and the opening of the first channel is welded to the hole, so that the interiors of the two are connected. The second channel has the same structure and processing method. The hollow space is a structure formed by the curved channel. The interior of the curved channel is not connected to the interior of the intake pipe, but is connected only at the two openings.

[0046] Example 2, as Figure 8 As shown, in some embodiments, the second check structure 4 includes a third channel 41 and a fourth channel 42 provided on the cylinder 1. The third channel 41 and the fourth channel 42 are each connected to the intake channel 11. The other end of the third channel 41 is connected to the other end of the fourth channel 42. The opening of the third channel 41 is closer to the interior of the cylinder 1 than the opening of the fourth channel 42. This allows the airflow to first enter the third channel 41 through the opening of the third channel 41 when it flows back through the intake pipe 2, then return to the intake channel 11 after passing through the fourth channel 42. The direction of the airflow outflowing from the fourth channel 42 has a component direction, which is opposite to the direction of the airflow backflow in the intake channel 11. This is the preferred structural form of the second embodiment of the present invention, that is, by providing the third and fourth channels on the cylinder, the third channel draws gas from the intake channel, and the fourth channel is used to guide the gas back to the intake channel. The direction of the gas discharged from the fourth channel is opposite to the direction of the gas backflow, which can effectively prevent backflow in the intake channel.

[0047] The backflow-preventing structure of the present application can be used in the suction of the pump body. The one-way valve structure composed of the cylinder and the flange (or the partition plate) can reduce the influence of the backflow. The structure can be continuously arranged along the suction passage at multiple angles. The flow passage can be curved or broken. Preferably, when arranged vertically, each unit is composed of two intersecting passages, and the two passages form a curved passage by using the flange or the partition plate which is attached to the cylinder. When arranged horizontally, the cylinder can be directly formed during casting.

[0048] In some embodiments, the third passage 41 is a cylindrical passage with a straight central axis, and the fourth passage 42 is also a cylindrical passage with a straight central axis. The central axis of the third passage 41 and the central axis of the fourth passage 42 are connected and bent, so that the passage composed of the third passage 41 and the fourth passage 42 is a bent passage. This is a further preferred structure of the third passage and the fourth passage of the present application, that is, to form two straight sections and a bent passage between them by bending.

[0049] In some embodiments, the direction of the central axis of the third passage 41 from its opening to its end is at an angle B° (0 < B° < 90°) with the flow direction of the gas in the suction passage 11, and the direction of the central axis of the fourth passage 42 from its opening to its end is at an angle A° (0 < A° < 90°) with the flow direction of the gas in the suction passage 11, and A > B. The angle B between the third passage and the flow direction of the gas is smaller than the angle A between the fourth passage and the flow direction of the gas, which can make the third passage as parallel as possible to the backflow direction of the gas, making it easier to introduce fluid, reducing resistance, and the angle between the fourth passage and the backflow direction is larger, which can produce greater resistance to backflow fluid, further preventing gas backflow.

[0050] In some embodiments, 35° ≤ A ≤ 80°, and 15° ≤ B ≤ A.

[0051] In some embodiments, the suction pipe 2 is a low-pressure suction pipe, which is low pressure relative to the exhaust of the rotor compressor; or the rotor compressor assembly further comprises an enthalpy-increasing pipe, and the suction pipe 2 is the enthalpy-increasing pipe. The suction pipe of the present application can be a low-pressure suction pipe, such as Figure 5 , or an enthalpy-increasing pipe, such as Figure 6 , which can effectively prevent the backflow of the suction.

[0052] In some embodiments, the suction passage 11 of the cylinder 1 is a low-pressure suction passage, which is low pressure relative to the exhaust of the rotor compressor; or the suction passage 11 is an enthalpy-increasing passage opened on the cylinder 1. The suction passage of the present application can be a low-pressure suction passage, such as Figure 5 , or an enthalpy-increasing passage, such asFigure 6 , all can effectively achieve the effect of preventing suction backflow.

[0053] The application also provides an air conditioner comprising the rotor compressor assembly of any one of the preceding.

[0054] If the compressor is an enthalpy increasing compressor, the structure can be used on the enthalpy increasing channel to prevent refrigerant backflow to the condenser. When the structure is arranged on the pump body, it can be similar to the implementation in 3. The cylinder, flange, and partition plate are punched or cast when arranged on the enthalpy increasing channel of the pump body.

[0055] In addition to being arranged on the pump body, a similar structure can also be arranged on the pipeline. For example, a bypass is welded on the pipeline, and the bypass can be selected to have a broken line or curved transition shape according to cost considerations. The bypass can also be arranged multiple times along the pipeline at multiple angles to achieve the same effect.

[0056] The pipeline can be the pipeline between the distributor and the pump body, or the pipeline above the distributor.

[0057] A one-way valve with a movable part can also be used to achieve the same effect. However, valve plate and spring type one-way valves have high costs and relatively low reliability, and the installation space can also compress other structures, making the suction not smooth.

[0058] The above only describes the preferred embodiments of the application and is not intended to limit the application. Any modifications, equivalent replacements, and improvements 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 is not intended to limit the application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A rotary compressor assembly, characterized by: The application relates to a rotor compressor assembly, which comprises a cylinder (1) and an air suction pipe (2), the cylinder (1) is provided with an air suction channel (11), the air suction pipe (2) is communicated with the air suction channel (11), a first check structure (3) is arranged on the air suction pipe (2), the first check structure (3) can prevent the backflow of gas in the air suction pipe (2), and a second check structure (4) is arranged on the air suction channel (11), the second check structure (4) can prevent the backflow of gas in the air suction channel (11). The second check structure (4) comprises a third channel (41) and a fourth channel (42) arranged on the cylinder (1), the third channel (41) and the fourth channel (42) are communicated with the air suction channel (11) respectively, the other end of the third channel (41) is communicated with the other end of the fourth channel (42), the opening of the third channel (41) is closer to the inside of the cylinder (1) than the opening of the fourth channel (42), so that when the gas flows back in the air suction pipe (2), the gas firstly enters the third channel (41) through the opening of the third channel (41), then returns to the air suction channel (11) through the fourth channel (42), and the direction of the gas flowing out of the fourth channel (42) has a component direction, the component direction is opposite to the backflow direction of the gas in the air suction channel (11). The third channel (41) is a cylindrical channel with a straight-line middle axis, the fourth channel (42) is also a cylindrical channel with a straight-line middle axis, the middle axis of the third channel (41) is connected with the middle axis of the fourth channel (42) and is bent, so that the channel composed of the third channel (41) and the fourth channel (42) is a bent channel. The direction of the central axis of the third channel (41) from the opening to the end is at an angle B° (0 35°<=A<=80°, 15°<=B<=A.

2. The rotor compressor assembly according to claim 1, wherein the first check structure (3) comprises a first channel (31) and a second channel (32), the opening of the first channel (31) and the opening of the second channel (32) are communicated with the air suction pipe (2) respectively, the other end of the first channel (31) is communicated with the other end of the second channel (32), the opening of the first channel (31) is opposite to the backflow direction of the gas in the air suction pipe (2), so as to introduce the gas into the first channel (31) and then into the second channel (32) and discharge the gas into the air suction pipe (2), and the opening of the second channel (32) is opposite to the backflow direction of the gas in the air suction pipe (2).

3. The rotor compressor assembly according to claim 2, wherein ​ ​ The opening of the first channel (31) is closer to the position where the suction pipe (2) connects with the cylinder (1) than the opening of the second channel (32), so that the gas flow first enters the first channel (31) through the opening of the first channel (31) when flowing reversely in the suction pipe (2).

4. The rotor compressor assembly according to claim 2, characterized in that: The normal direction of the opening surface of the first channel (31) forms an angle a1 with the central axis of the suction pipe (2), and the normal direction of the opening surface of the second channel (32) forms an angle a2 with the central axis of the suction pipe (2), and a1 < a2.

5. The rotor compressor assembly according to claim 2, characterized in that: The first channel (31) intersects with the second channel (32) and is bent or curved, forming a curved channel, the opening of the first channel (31) is located at a first position where the first channel (31) connects with the suction pipe (2), the opening of the second channel (32) is located at a second position where the second channel (32) connects with the suction pipe (2), and a hollow space (5) is formed between the first position and the second position and between the curved channel and the outer wall of the suction pipe (2).

6. The rotor compressor assembly according to any one of claims 1-5, characterized in that: The suction pipe (2) is a low-pressure suction pipe, and the low-pressure suction pipe is low-pressure relative to the exhaust of the rotor compressor; or the rotor compressor assembly further comprises an enthalpy-increasing pipe, and the suction pipe (2) is the enthalpy-increasing pipe.

7. The rotor compressor assembly according to any one of claims 1-5, characterized in that: The suction channel (11) of the cylinder (1) is a low-pressure suction channel, and the low-pressure suction channel is low-pressure relative to the exhaust of the rotor compressor; or the suction channel (11) is an enthalpy-increasing channel provided on the cylinder (1).

8. An air conditioner characterized by comprising: A rotor compressor assembly comprising any one of claims 1-7.

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