A compressor and an air conditioner

Abstract

The present invention provides a compressor and an air conditioner, the compressor comprising: a housing component (1), a pump body component (3) being arranged inside the housing component (1), a housing cavity (100) being formed inside the housing component (1), and a pump body cavity (200) being formed on the pump body component (3) being sealed with the housing cavity (100), so that the fluid entering the pump body cavity (200) can be separated into gas and liquid or oil and gas. The present invention can effectively omit the structure of the gas-liquid separator while completing the gas-liquid separation, and effectively omit the structure of the oil separator while completing the oil-gas separation, and can also greatly reduce the volume and weight of the structure, so that the volume and weight of the compressor can be effectively reduced while ensuring the gas-liquid separation and oil-gas separation.

Description

Technical Field

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

[0002] There are two main types of rolling rotor compressors used in existing refrigeration systems: one is a high back-pressure compressor with a high-pressure refrigerant in the compressor housing assembly, and the other is a low back-pressure compressor with a low-pressure refrigerant in the compressor housing assembly.

[0003] The high back-pressure compressor uses an external liquid separator on the suction pipe to separate the inhaled mixed refrigerant into gas and liquid to ensure that the pump body does not carry liquid when sucking air, thereby ensuring the reliability of the compressor. However, the volume and mass of the compressor increase with the installation of the liquid separator. At the same time, the liquid separator will generate noise and even resonate with the compressor body, causing the noise of the compressor to increase during operation.

[0004] The low back-pressure compressor relies on the inner cavity of the compressor shell assembly to separate the gas-liquid mixed refrigerant, but the exhaust oil rate of the compressor is high, that is, the oil circulation rate is high, which causes oil accumulation in the pipes of the refrigeration system, seriously affecting heat exchange and reducing the energy efficiency of the whole machine. The existing technology is to connect an oil separator to the exhaust pipe to reduce the oil circulation rate, but the oil separator has the same problems as the high back-pressure compressor separator.

[0005] With the improvement of living standards, the requirements for low noise, light weight, small size and high energy efficiency of compressors are getting higher and higher. Therefore, how to ensure that the liquid separator of high back pressure compressor plays the role of gas-liquid separation while avoiding the problems of volume, mass and noise to the compressor; how to ensure that the oil separator of low back pressure compressor reduces the exhaust oil circulation rate while avoiding the problems of volume, mass and noise to the compressor is one of the problems that need to be solved urgently in the field of rolling rotor compressors.

[0006] Since the compressors in the prior art have problems such as the compressor being too large in size, too large in mass and noisy due to the setting of a gas-liquid or a low-pressure gas-liquid separation or the use of an oil separator for high-pressure oil separation, as well as technical problems such as poor gas-liquid separation effect or poor oil-gas separation effect, the present invention studies and designs a compressor and an air conditioner. Summary of the invention

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the compressor in the prior art that the compressor is too large in size and too large in mass due to the provision of a gas-liquid separator or an oil separator, and cannot ensure that both gas-liquid separation and oil-gas separation can be performed while effectively reducing the volume and mass of the compressor, thereby providing a compressor and an air conditioner.

[0008] The present invention provides a compressor, comprising:

[0009] A shell assembly is provided inside the shell assembly, and a shell cavity is formed inside the shell assembly. The pump body assembly forms a pump body cavity sealed with the shell cavity, so that the fluid entering the pump body cavity can be separated into gas and liquid or oil and gas.

[0010] Preferably,

[0011] The pump body assembly includes a pump body, the pump body cavity is located radially outside the pump body, the fluid entering the pump body cavity can also exchange heat with the outer wall of the pump body, and the pump body includes a cylinder and a rotor.

[0012] Preferably,

[0013] The pump body assembly also includes a flange, which includes an upper flange, a lower flange and a lower flange cover, and the lower flange cover is arranged at the end surface of the lower flange, and the lower flange cover is a cylindrical structure, the side wall of which extends toward the upper flange and is connected to the upper flange, and the pump body cavity is formed in the space surrounded by the lower flange cover and the upper flange, and the pump body is located inside the pump body cavity.

[0014] Preferably,

[0015] The pump body assembly also includes a flange, which includes an upper flange, a lower flange and a lower flange cover, and the lower flange cover is arranged at the end surface of the lower flange, and the upper flange is a cylindrical structure, and its side wall extends toward the lower flange cover and is connected to the lower flange cover, and the pump body cavity is formed in the space surrounded by the lower flange cover and the upper flange, and the pump body is located inside the pump body cavity.

[0016] Preferably,

[0017] A first through hole is provided on the peripheral wall of the lower flange cover, and a second through hole is provided on the shell assembly at a position opposite to the first through hole. The pump body cavity can inhale air from outside the shell assembly or discharge air to outside the shell assembly through the first through hole and the second through hole.

[0018] Preferably,

[0019] At least one linear groove along the axial direction is provided on the outer wall of at least one of the pump body and the lower flange; and / or, the pump body also includes a crankshaft, and at least one spirally encircled annular groove is provided on the outer wall of at least one of the pump body and the lower flange, and the encircling direction of the annular groove is opposite to the rotation direction of the crankshaft.

[0020] Preferably,

[0021] When the first through hole and the second through hole are included: an air intake pipe is disposed in the first through hole and the second through hole, and the axial direction of the air intake pipe is the same as the tangent direction of the air intake pipe extending to the position of the annular groove.

[0022] Preferably,

[0023] The pump body further comprises a crankshaft. At least one spiral partition plate is disposed in the pump body cavity. The spiral partition plate is wound in a direction opposite to the rotation direction of the crankshaft.

[0024] Preferably,

[0025] When the flange includes a lower flange and a lower flange cover, and the lower flange cover is a cylindrical structure, the radial outer side of the spiral partition is connected to the lower flange cover, and the radial inner side is connected to the pump body and / or the lower flange.

[0026] Preferably,

[0027] The spiral partition and the lower flange cover are integrally formed, or the two are welded together, or the two are interference fit, or the two are connected by a buckle.

[0028] Preferably,

[0029] The spiral partition is also provided with an oil collecting hole, and the bottom of the lower flange cover is also provided with an oil drain hole, and the oil drain hole is also connected to a pressure drop device.

[0030] Preferably,

[0031] A third through hole is provided on the top of the shell assembly, which can inhale air from the outside of the shell assembly or discharge air to the outside of the shell assembly; and / or the compressor is a rotor compressor.

[0032] The present invention also provides an air conditioner, comprising the compressor as described in any of the preceding items.

[0033] The compressor and air conditioner provided by the present invention have the following beneficial effects:

[0034] 1. The present invention forms a pump body cavity in the pump body assembly inside the compressor housing assembly, and the pump body cavity is sealed and separated. When the housing cavity is at a high back pressure, air can be taken in from the pump body cavity, and gas-liquid separation can be completed in the pump body cavity, and air can be sucked into the pump body for compression. While completing the gas-liquid separation, the structure of the gas-liquid separator is effectively omitted, so that the structure volume is greatly reduced and the quality is reduced. When the housing cavity is at a low back pressure, air can be exhausted from the pump body cavity, and oil-gas separation can be completed in the pump body cavity and discharged to the outside of the housing assembly. While completing the oil-gas separation, the structure of the oil separator is effectively omitted, and the structure volume is also greatly reduced and the quality is reduced. It can ensure gas-liquid separation and oil-gas separation while effectively reducing the volume and quality of the compressor. The integrated design of the liquid separator structure (oil-gas separation structure) and the pump body structure can not only reduce the volume and quality of the compressor, but also play the role of gas-liquid separation and oil-gas separation.

[0035] 2. The present invention also uses the spiral guide structure design of the inner cavity of the lower flange cover to make the gas spirally rotate, enhance the flow guidance, strengthen the gas-liquid separation or oil-gas separation effect, and improve the heat exchange between the pump body; and through the axial line groove setting, it can generate resistance to the annular flow of gas, generate tangential push on the pump body, effectively reduce the tangential vibration of the compressor, and help improve noise; for high back-pressure compressors, the groove structure design of the pump body parts effectively increases the heat exchange area, increases the heat exchange speed, cools the pump body, reduces the temperature of the pump body, and vaporizes the liquid refrigerant; for low back-pressure compressors, the motor heats the mixed refrigerant, cools the motor to vaporize the liquid refrigerant, reduces the temperature of the motor, and at the same time, improves the separation efficiency of the discharged oil-gas mixed refrigeration and reduces the oil circulation rate of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a refrigeration cycle structure diagram of the first embodiment of the air conditioner of the present invention;

[0037] Figure 2 is a schematic diagram of the internal structure of a compressor embodiment 1 of the present invention;

[0038] Figure 3 is a cross-sectional view of a pump assembly inside a compressor of the present invention;

[0039] Figure 4 yes Figure 2 AA section structure schematic diagram in;

[0040] Figure 5 yes Figure 2 Structural diagram of the middle upper flange;

[0041] Figure 6 yes Figure 3A partial cross-sectional view of a preferred structure of a pump body assembly;

[0042] Figure 7a yes Figure 2 A top view of the lower flange cover plate in FIG.

[0043] Figure 7b yes Figure 7a BB cross-section structure diagram in;

[0044] Figure 8 is a cross-sectional view of the internal structure of a compressor according to a second embodiment of the present invention;

[0045] Fig. 9 yes Figure 8 Schematic diagram of CC cross-section structure in;

[0046] Fig.10a yes Figure 8 A top view of the lower flange cover plate in FIG.

[0047] Fig.10b yes Fig.10a DD cross-section structure diagram in;

[0048] Fig.11 is a cross-sectional view of the internal structure of a compressor according to a third embodiment of the present invention;

[0049] Fig.12 is a refrigeration cycle structure diagram of a fourth embodiment of an air conditioner of the present invention;

[0050] Fig.13 1 is a schematic diagram of the internal structure of a compressor embodiment 4 of the present invention (top air intake);

[0051] Fig.14 yes Fig.13 A top view of the upper flange in FIG.

[0052] Fig.15a yes Fig.13 A bottom view of the lower flange cover;

[0053] Fig.15b yes Fig.13 Top view of the lower flange cover.

[0054] The reference numerals in the figure represent:

[0055] 1. Shell assembly; 111. Second through hole; 112. Third through hole; 2. Motor assembly; 3. Pump assembly; 4. Crankshaft; 5. Upper flange; 6. Upper roller; 7. Sealing gasket; 8. Upper cylinder; 9. Upper partition; 10. Lower partition; 11. Lower roller; 12. Lower cylinder; 13. Lower flange; 14. Lower flange cover; 141. First through hole; 15. Screw; 16. Upper slide; 17. Wire groove; 18. Spiral groove; 19. Sealing groove; 20. Spiral partition; 21. Middle partition; 22. Air inlet; 23. Oil collecting hole; 24. Oil drain hole; 25. Intake pipe.

[0056] 100, housing cavity; 200, pump body cavity; 300, pump body. DETAILED DESCRIPTION

[0057] Example 1 Figure 1-7b As shown, the present invention provides a compressor, which includes:

[0058] The present invention has the following embodiments: an air conditioning system using a high back pressure two-stage compressor, such as Figure 1 As shown, the mixed refrigerant that flows into the compressor through the evaporator enters the outer cavity of the pump body and undergoes gas-liquid separation. It is then sucked into the lower cylinder and compressed once and discharged into the lower flange cavity and the lower partition cavity, and then enters the upper cylinder through the flow hole of the pump body; the upper cylinder compresses the refrigerant for a second time to form a high-temperature and high-pressure gas and discharges it into the compressor housing, and then passes through the condenser to become a low-temperature and high-pressure gas-liquid mixed refrigerant, and then passes through the throttle valve to throttle and reduce the pressure, enters the evaporator to exchange heat with the outside, and finally returns to the compressor.

[0059] The compressor with built-in liquid distributor of the present invention mainly comprises a housing component 1, a motor component 2 and a pump body component 3 (see Figure 2 ),like Figure 3 As shown, the pump body assembly 3 mainly includes a crankshaft 4, an upper flange 5, an upper roller 6, a sealing gasket 7, an upper cylinder 8, an upper partition 9, a lower partition 10, a lower roller 11, a lower cylinder 12, a lower flange 13, a lower flange cover 14, screws 15, an upper slide 16 and other parts.

[0060] like Figure 2 and Figure 3 As shown, during the operation of the pump body, the rotor of the motor assembly 2 mainly drives the crankshaft 4 in the pump body assembly 3 to rotate. Figure 4As shown, the upper roller 6 is mounted on the eccentric circle of the crankshaft 4 and rotates with the crankshaft 4. Since the outer wall of the upper roller 6 and the inner wall of the upper cylinder 8 form a cavity, the upper slide 16 and the upper roller 6 cooperate to divide the air cavity into two parts, namely, a low-pressure cavity and a high-pressure cavity. As the position of the upper roller 6 changes, the low-pressure cavity gradually increases to form a negative pressure to absorb low-temperature and low-pressure refrigerant, and the volume of the high-pressure cavity gradually decreases to compress the refrigerant into high-temperature and high-pressure and discharge it, thereby achieving refrigerant compression. The upper cylinder 8 and the lower cylinder 12 of the two-stage compressor can simultaneously perform the above-mentioned refrigerant compression work. The lower cylinder 12 inhales the gaseous refrigerant in the refrigeration system for primary compression and then discharges it into the cavity of the lower flange 13 and the cavity of the lower partition 10, enters the upper cylinder 8 through the fluid hole for secondary compression, and then discharges it into the compressor housing.

[0061] The housing assembly 1 has a pump body assembly 3 disposed therein, and a housing cavity 100 is formed therein, and the pump body assembly 3 has a pump body cavity 200 sealed from the housing cavity 100, so that the fluid entering the pump body cavity 200 can be separated into gas and liquid or oil and gas.

[0062] The present invention forms a pump body cavity in the pump body assembly inside the compressor housing assembly and seals and separates it from the housing cavity. When the housing cavity is under high back pressure, air can be taken in from the pump body cavity, gas-liquid separation can be completed in the pump body cavity, and air can be sucked into the pump body for compression. While completing the gas-liquid separation, the structure of the gas-liquid separator is effectively omitted, so that the structure volume is greatly reduced and the quality is reduced. When the housing cavity is under low back pressure, air can be exhausted from the pump body cavity, oil-gas separation can be completed in the pump body cavity, and the oil-gas separation can be discharged to the outside of the housing assembly. While completing the oil-gas separation, the structure of the oil separator is effectively omitted, so that the structure volume is greatly reduced and the quality is reduced. It can ensure gas-liquid separation and oil-gas separation while effectively reducing the volume and quality of the compressor. The integrated design of the liquid separator structure (oil-gas separation structure) and the pump body structure can not only reduce the volume and quality of the compressor, but also play the role of gas-liquid separation and oil-gas separation.

[0063] Preferably,

[0064] The pump body assembly includes a pump body 300, the pump body cavity 200 is located radially outside the pump body 300, and the fluid entering the pump body cavity 200 can also exchange heat with the outer wall of the pump body 300. The pump body 300 includes a cylinder and a rotor. The present invention can also allow the fluid in the pump body cavity to exchange heat with the pump body through the pump body cavity, thereby effectively reducing the temperature of the pump body. The mixed refrigerant is heated before the compressor cylinder is sucked in, and the separation efficiency of the gas-liquid mixed refrigerant is improved. When the compressor is at a high back pressure, the heat exchange rate between the pump body and the gas-liquid mixed refrigerant can be increased, and the temperature of the pump body can be reduced.

[0065] like Figure 2-3 As shown, preferably,

[0066] The pump body assembly also includes a flange, which includes an upper flange 5, a lower flange 13 and a lower flange cover 14, and the lower flange cover 14 is arranged at the end surface of the lower flange 13, and the lower flange cover 14 is a cylindrical structure, and its side wall extends toward the direction of the upper flange 5 and is connected to the upper flange 5, and the pump body cavity 200 is formed in the space surrounded by the lower flange cover 14 and the upper flange 5, and the pump body 300 is located inside the pump body cavity 200.

[0067] This is the preferred formation method of the pump body cavity of the first embodiment of the present invention, that is, the lower flange cover is specially arranged to form a cylindrical structure, which is sealed with the upper flange to form a pump body cavity structure with a sealed cavity inside, so that the refrigerant enters the pump body cavity during suction to complete the gas-liquid separation, and enters the pump body cavity during exhaust to complete the oil-gas separation. There is no need to set up a gas-liquid separator and an oil separator, so that the overall volume and mass of the compressor are greatly reduced, while the original gas-liquid separation and oil separation functions are guaranteed.

[0068] The present invention solves the following technical problems:

[0069] Reduce the volume of the compressor; reduce the mass of the compressor; reduce the tangential vibration of the compressor, which is beneficial to improve noise; the mixed refrigerant is heated before the compressor cylinder is sucked in, which improves the separation efficiency of the gas-liquid mixed refrigerant; when the compressor is at high back pressure, the heat exchange rate between the pump body and the gas-liquid mixed refrigerant can be increased, and the temperature of the pump body can be reduced; when the compressor is at low back pressure, the heat exchange rate between the motor and the gas-liquid mixed refrigerant can be increased, and the temperature of the motor can be reduced; when the compressor is at low back pressure, the exhaust oil-gas separation efficiency is improved, and the oil circulation rate of the compressor is reduced.

[0070] Preferably,

[0071] The pump body assembly also includes a flange, which includes an upper flange 5, a lower flange 13 and a lower flange cover 14, and the lower flange cover 14 is arranged at the end surface of the lower flange 13, and the upper flange 5 is a cylindrical structure, and its side wall extends toward the direction of the lower flange cover 14 and is connected to the lower flange cover 14, and the pump body cavity 200 is formed in the space surrounded by the lower flange cover 14 and the upper flange 5, and the pump body 300 is located inside the pump body cavity 200.

[0072] This is a preferred way of forming the pump body cavity of an alternative embodiment of the first embodiment of the present invention (not shown in the figure), that is, through the special setting of the upper flange, it is formed into a cylindrical structure, and is sealed with the lower flange cover to form a pump body cavity structure with a sealed cavity inside, so that the refrigerant enters the pump body cavity during suction to complete the gas-liquid separation, and enters the pump body cavity during exhaust to complete the oil-gas separation. There is no need to set up a gas-liquid separator and an oil separator, so that the overall volume and mass of the compressor are greatly reduced, and the original gas-liquid separation and oil separation functions are guaranteed.

[0073] Preferably,

[0074] A first through hole 141 is provided on the peripheral wall of the lower flange cover 14, and a second through hole 111 is provided on the housing assembly 1 at a position opposite to the first through hole 141. Through the first through hole 141 and the second through hole 111, the pump body cavity 200 can inhale air from the outside of the housing assembly 1 or exhaust air to the outside of the housing assembly 1. This is a preferred structural form of the lower flange cover and the housing assembly of the present invention, and the first through hole and the second through hole can allow an air intake pipe or an air exhaust pipe to pass therethrough to complete the air intake process of the pump body cavity or the air exhaust process from the pump body cavity to the outside.

[0075] Preferably,

[0076] At least one wire groove 17 along the axial direction is provided on the outer wall of at least one of the pump body 300 and the lower flange 13; and / or, the pump body 300 also includes a crankshaft 4, and at least one spiral groove 18 is spirally arranged on the outer wall of at least one of the pump body 300 and the lower flange 13, and the winding direction of the spiral groove 18 is opposite to the rotation direction of the crankshaft 4.

[0077] This is a further preferred structural form of Example 1 of the present invention. By setting the wire groove in the axial direction, it can generate resistance to the annular flow of gas, generate tangential push on the pump body, effectively reduce the tangential vibration of the compressor, help improve noise, and also effectively increase the heat exchange area, improve the heat exchange rate, cool the pump body, reduce the temperature of the pump body, and gasify the liquid refrigerant; at the same time, an annular groove (i.e., spiral groove 18) is set around the crankshaft 4, and the circumferential direction is opposite to the rotation direction of the crankshaft 4, which increases the heat exchange area of ​​the pump body parts, guides the inhaled refrigerant to spirally rotate the gas, enhances the flow guidance, strengthens the gas-liquid separation or oil-gas separation, and improves the heat exchange between the pump body. It is further preferred that the upper flange, the lower flange, the cylinder, and the outer wall of the partition are provided with wire grooves and spiral grooves.

[0078] Preferably,

[0079] When the first through hole 141 and the second through hole 111 are included, an air intake pipe 25 is disposed in the first through hole 141 and the second through hole 111 , and the axial direction of the air intake pipe 25 is the same as the tangential direction of the air intake pipe 25 extending to the position of the spiral groove 18 .

[0080] like Figure 4 As shown, the axis of the pump suction pipe of the present invention does not point to the center of the circle. This situation is called "offset" setting. The offset direction is consistent with the direction of the spiral groove 18. The shell and the pump suction pipe are offset to promote the flow of the fluid along the annular groove, promote the flow guidance effect, and increase the tangential force on the pump body, further reduce the vibration of the pump body, and enhance the heat exchange; as shown in FIG. Figure 2 As shown, the mixed refrigerant in the system enters the outer cavity of the pump body of the compressor from the shell offset suction pipe. The refrigerant rotates around the pump body and moves downward. Its rotation direction is opposite to that of the crankshaft. In this process, the refrigerant exchanges heat with the pump body, absorbs the heat generated by the compression process of the pump body and vaporizes, and is finally sucked into the pump body by the lower cylinder.

[0081] like Figure 3 As shown, the upper flange 5 end face of the pump body, the upper cylinder 8, the upper partition 9, the lower partition 10, the lower cylinder 12, the lower flange 13 and the lower flange cover 14 constitute a component with gas-liquid separation function. Figure 5 As shown, the end face of the upper flange 5 is a sealing surface plane. Figure 6 As shown in FIG. 7 , the inner cavity of the lower flange cover 14 can accommodate other parts of the pump body. The upper end surface of the lower flange cover 14 matches the end surface of the upper flange 5, and a sealing groove 19 is provided to ensure the sealing performance of the lower flange cover 14 and the upper flange 5. Figure 5 and Figure 6 As shown, the outer walls of the upper cylinder 8, the upper partition 9, the lower partition 10, the lower cylinder 12, and the lower flange 13 are provided with a line groove 17 in the direction of the axis of the crankshaft 4, and a spiral groove 18 is provided around the crankshaft 4, and the circumferential direction is opposite to the rotation direction of the crankshaft 4, so as to increase the heat exchange area of ​​the pump body parts and guide the inhaled refrigerant to swirl. Figure 4 As shown, the housing and the pump body suction pipe are offset, and the offset direction is consistent with the direction of the spiral groove 18.

[0082] like Figure 2 As shown, the mixed refrigerant in the system enters the outer cavity of the pump body of the compressor from the shell offset suction pipe. The refrigerant rotates around the pump body and moves downward. Its rotation direction is opposite to that of the crankshaft. In this process, the refrigerant exchanges heat with the pump body, absorbs the heat generated by the compression process of the pump body and vaporizes, and is finally sucked into the pump body by the lower cylinder.

[0083] Embodiment 2, as Figure 8-10b As shown, preferably,

[0084] The pump body 300 further includes a crankshaft 4, and at least one spiral partition 20 is disposed in the pump body cavity 200, and the spiral partition 20 is wound in a direction opposite to the rotation direction of the crankshaft 4. Figure 8 As shown, the main difference between the second embodiment and the first embodiment is that: Figure 8 As shown, the upper cylinder 8, the upper partition 9, the lower partition 10, the lower cylinder 12, and the lower flange 13 do not have the spiral groove 18 around the crankshaft 4. Fig. 9 As shown in FIG. 10 , a spiral partition plate 20 is provided in the lower flange cover 14 in a direction opposite to the rotation direction of the crankshaft 4 to enhance the spiral rotation guiding effect of the inner cavity of the lower flange cover 14 on the refrigerant.

[0085] Preferably,

[0086] When the flange includes a lower flange 13 and a lower flange cover 14, and the lower flange cover 14 is a cylindrical structure, the radial outer side of the spiral partition 20 is connected to the lower flange cover 14, and the radial inner side is connected to the pump body 300 and / or the lower flange 13. This is a further preferred structural form of the second embodiment of the present invention, that is, the radial outer side of the spiral partition is connected to the lower flange cover, and the radial inner side is connected to the pump body and / or the lower flange, so that the pump body cavity is strictly divided into a spiral three-dimensional channel, so that the fluid entering the pump body cavity flows along the spiral channel, further enhancing the fluid diversion effect, improving the gas-liquid separation or oil-gas separation effect, and the heat exchange area is increased, the heat exchange efficiency is enhanced, and the cooling effect and shear vibration resistance of the pump body are also improved.

[0087] Preferably,

[0088] The spiral partition 20 and the lower flange cover 14 are integrally formed, or the two are welded, or the two are interference fit, or the two are connected by snap fasteners. This is a further preferred structural form of the spiral partition of the present invention, which can form an integrated lower flange cover structure, so that the gas-liquid separation effect and the oil separation effect are further enhanced, and the assembly is convenient.

[0089] Embodiment 3

[0090] like Fig.11 As shown, the upper cylinder 8, the upper partition 9, the lower partition 10, the lower cylinder 12, and the lower flange 13 are provided with a spiral groove 18 around the crankshaft 4, and the lower flange cover 14 is provided with a spiral partition 20 in the opposite direction of rotation of the crankshaft 4, which further effectively improves the spiral rotation guiding effect of the inner cavity of the lower flange cover 14 on the refrigerant, that is, it has both a spiral groove and a spiral partition.

[0091] Embodiment 4

[0092] like Figure 12-15b As shown, Fig.12 As shown, in the air-conditioning system using a low back-pressure two-stage compressor, the mixed refrigerant flowing into the compressor through the evaporator enters the compressor housing, is then sucked into the upper cylinder 8 and compressed once and discharged into the partition cavity, and then enters the upper cylinder 8 through the flow hole of the pump body; the lower cylinder 12 compresses the refrigerant for a second time to form a high-temperature and high-pressure gas and discharges it into the outer cavity of the pump body, passes through the oil-gas separation structure of the pump body, enters the condenser and becomes a low-temperature and high-pressure gas-liquid mixed refrigerant, and then passes through the throttle valve to throttle and reduce the pressure, enters the evaporator to exchange heat with the outside, and finally returns to the compressor.

[0093] like Fig.13 As shown, the main difference of this embodiment is that the compression sequence of the upper cylinder 8 and the lower cylinder 12 of the compressor is swapped, the air is sucked into the compressor housing, and the exhaust is discharged to the outer cavity of the pump body and then directly discharged into the refrigeration system. The refrigerant is separated from the oil and gas in the outer cavity of the pump body by the impact of the spiral partition 20 and the rotation and centrifugation of the refrigerant (the upper cylinder sucks air from the housing for the first stage of compression, and the first stage compressed refrigerant enters the lower cylinder for the second stage of compression, and then is discharged to the outer cavity of the pump body for oil and gas separation, and finally directly discharged into the refrigeration system). Fig.14 As shown, the upper flange 5 has no exhaust valve seat, but only an air inlet 22 of the upper cylinder 8; as shown in FIG15 , the spiral partition of the lower flange cover 14 has an oil collecting hole 23, and the bottom of the lower flange cover 14 has an oil drain hole 24, which is connected to a pressure drop capillary to ensure that the oil in the outer cavity of the pump body returns to the compressor housing.

[0094] Preferably,

[0095] The spiral partition plate is also provided with an oil collecting hole 23, and the bottom of the lower flange cover 14 is also provided with an oil drain hole 24, and the oil drain hole 24 is also connected to a pressure drop device. As shown in FIG15 , the spiral partition plate of the lower flange cover 14 has an oil collecting hole 23, and the bottom of the lower flange cover 14 has an oil drain hole 24, and the oil drain hole 24 is connected to a pressure drop capillary to ensure that the oil in the outer cavity of the pump body returns to the compressor housing.

[0096] Preferably,

[0097] The top of the shell assembly 1 is provided with a third through hole 112, which can inhale air from the outside of the shell assembly 1 or discharge air to the outside of the shell assembly 1; and / or, the compressor is a rotary compressor. Through the third through hole provided on the top of the shell assembly, high-pressure exhaust can be achieved through the third through hole when the back pressure of the shell assembly is high, and low-pressure intake can be achieved through the third through hole when the back pressure is low. The scheme of the present invention is not only applicable to the above-mentioned embodiment, but also applicable to single-cylinder, three-cylinder and above compressors.

[0098] The present invention also provides an air conditioner, which includes the compressor described in any of the preceding items. The present invention forms a pump body cavity in the pump body assembly inside the compressor housing assembly, and is sealed and separated from the housing cavity. When the housing cavity is at high back pressure, air can be taken in from the pump body cavity, and gas-liquid separation can be completed in the pump body cavity, and air can be sucked into the pump body for compression. While completing gas-liquid separation, the structure of the gas-liquid separator is effectively omitted, so that the structure volume is greatly reduced and the quality is reduced. When the housing cavity is at low back pressure, air can be exhausted from the pump body cavity, and oil-gas separation can be completed in the pump body cavity and discharged to the outside of the housing assembly. While completing oil-gas separation, the structure of the oil separator is effectively omitted, so that the structure volume is greatly reduced and the quality is reduced. It can ensure gas-liquid separation and oil-gas separation while effectively reducing the volume and quality of the compressor. The integrated design of the liquid separator structure (oil-gas separation structure) and the pump body structure can not only reduce the volume and quality of the compressor, but also play the role of gas-liquid separation and oil-gas separation.

[0099] The present invention provides a built-in liquid distributor compressor. The liquid distributor structure (oil-gas separation structure) and the pump body structure are integrated to reduce the volume of the compressor, reduce the mass of the compressor, and play a role in gas-liquid separation. At the same time, the spiral guide structure design of the inner cavity of the lower flange cover makes the gas spirally rotate, reducing the tangential vibration of the compressor, which is conducive to improving noise; for high back pressure compressors, the groove structure design of the pump body parts improves the heat exchange speed and cools the pump body to gasify the liquid refrigerant; for low back pressure compressors, the motor heats the mixed refrigerator and cools the motor to gasify the liquid refrigerant. At the same time, the separation efficiency of the discharged oil-gas mixed refrigeration is improved and the oil circulation rate of the compressor is reduced. The compressor is light in weight, small in size, and can reduce noise. When the compressor is at high back pressure, its pump body has a gas-liquid separation structure, which can separate the suction gas into gas and liquid, significantly reduce the temperature of the pump body, and has good reliability; when the compressor is at low back pressure, the temperature of the motor is significantly reduced, and its pump body has an oil separation structure to improve the oil-gas separation efficiency and reduce the oil circulation rate of the compressor.

[0100] The gas-liquid separation structure of the pump body assembly consists of an upper flange, a lower flange, a lower flange cover, a cylinder, and a partition. Its structure can separate the gas and liquid of the suction air and cool the pump body, and resist the tangential vibration of the pump body; the outer walls of the upper flange, the lower flange, the cylinder, and the partition are provided with wire grooves and spiral grooves; the lower flange cover is a cylindrical structure, and a spiral partition is provided on the inner wall; the lower flange cover of the low back pressure compressor is provided with an oil hole; the suction (or exhaust) air pipe on the shell that cooperates with the pump body is a non-centering design, and the direction is opposite to the direction of rotation of the crankshaft.

[0101] The present invention solves the following technical problems

[0102] Reduce the volume of the compressor; reduce the mass of the compressor; reduce the tangential vibration of the compressor, which is beneficial to improve noise; the mixed refrigerant is heated before the compressor cylinder is sucked in, which improves the separation efficiency of the gas-liquid mixed refrigerant; when the compressor is at high back pressure, the heat exchange rate between the pump body and the gas-liquid mixed refrigerant can be increased, and the temperature of the pump body can be reduced; when the compressor is at low back pressure, the heat exchange rate between the motor and the gas-liquid mixed refrigerant can be increased, and the temperature of the motor can be reduced; when the compressor is at low back pressure, the exhaust oil-gas separation efficiency is improved, and the oil circulation rate of the compressor is reduced.

[0103] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A compressor, characterized in that: include: A housing assembly (1), wherein a pump body assembly (3) is arranged inside the housing assembly (1), and a housing cavity (100) is formed inside the housing assembly (1), and the pump body assembly (3) is formed with a pump body cavity (200) sealed from the housing cavity (100), so that fluid entering the pump body cavity (200) can be separated into gas and liquid during air intake or into oil and gas during air discharge; The pump body assembly comprises a pump body (300), the pump body cavity (200) is located radially outside the pump body (300), the fluid entering the pump body cavity (200) can also exchange heat with the outer wall of the pump body (300), and the pump body (300) comprises a cylinder and a rotor; The pump body assembly further comprises a flange, wherein the flange comprises an upper flange (5), a lower flange (13) and a lower flange cover (14), wherein the lower flange cover (14) is arranged at an end surface of the lower flange (13), and the lower flange cover (14) is a cylindrical structure, wherein a side wall thereof extends toward the upper flange (5) and is connected to the upper flange (5), and the pump body cavity (200) is formed in a space surrounded by the lower flange cover (14) and the upper flange (5), and the pump body (300) is located inside the pump body cavity (200); At least one linear groove (17) is provided on the outer wall of at least one of the pump body (300) and the lower flange (13) along the axial direction; the pump body (300) further comprises a crankshaft (4); at least one spiral groove (18) is provided on the outer wall of at least one of the pump body (300) and the lower flange (13) in a spiral manner, and the spiral groove (18) has a spiral direction opposite to the rotation direction of the crankshaft (4).

2. The compressor according to claim 1, characterized in that: A first through hole (141) is provided on the peripheral wall of the lower flange cover (14), and a second through hole (111) is provided on the housing assembly (1) at a position opposite to the first through hole (141); air can be sucked in from outside the housing assembly (1) or discharged to outside the housing assembly (1) through the first through hole (141), the second through hole (111) and the pump body cavity (200).

3. The compressor according to claim 1, characterized in that: When the first through hole (141) and the second through hole (111) are included: an air intake pipe (25) is provided in the first through hole (141) and the second through hole (111), and the axial direction of the air intake pipe (25) is the same as the tangent direction of the air intake pipe (25) extending to the position of the spiral groove (18).

4. The compressor according to claim 1, characterized in that: The pump body (300) further comprises a crankshaft (4), and at least one spirally wound spiral partition (20) is arranged in the pump body cavity (200), and the spiral partition (20) has a winding direction opposite to the rotation direction of the crankshaft (4).

5. The compressor according to claim 4, characterized in that: When the flange comprises a lower flange (13) and a lower flange cover (14), and the lower flange cover (14) is a cylindrical structure, the radial outer side of the spiral partition plate (20) is connected to the lower flange cover (14), and the radial inner side is connected to the pump body (300) and / or the lower flange (13).

6. The compressor according to claim 5, characterized in that: The spiral partition plate (20) and the lower flange cover (14) are integrally formed, or the two are connected by welding, or the two are interference fit, or the two are connected by snap fastening.

7. The compressor according to claim 5, characterized in that: The spiral partition plate is also provided with an oil collecting hole (23), and the bottom of the lower flange cover (14) is also provided with an oil drain hole (24), and the oil drain hole (24) is also connected to a pressure drop device.

8. The compressor according to any one of claims 1 to 7, characterized in that: A third through hole (112) is provided on the top of the shell component (1), capable of sucking air from outside the shell component (1) or exhausting air to outside the shell component (1); and / or the compressor is a rotor compressor.

9. An air conditioner, characterized in that: A compressor comprising the compressor described in any one of claims 1-8.

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