Pump body assembly, scroll compressor, air conditioner

Abstract

The application provides a pump body assembly, scroll compressor and air conditioner, wherein the pump body assembly comprises a moving scroll and a stationary scroll, the stationary scroll is provided with an enthalpy-increasing port for supplementing gas in a first area in a compression cavity via the enthalpy-increasing port, the moving scroll is provided with a cooling cavity, the cooling cavity is provided with an inlet and an outlet, the inlet is provided with an inlet gas communication position at least partially coinciding with the enthalpy-increasing port and an inlet gas closing position being cut off from the enthalpy-increasing port, the outlet is provided with an outlet gas communication position being communicated with a second area in the compression cavity and an outlet gas closing position being cut off from the second area, the pressure of refrigerant in the first area is higher than that in the second area, when the inlet is in the inlet gas communication position, the outlet is in the outlet gas closing position, when the inlet is in the inlet gas closing position, the outlet is in the outlet gas communication position. The application effectively reduces the deformation of the moving scroll during operation, reduces the probability of the occurrence of the liquid-carrying phenomenon of the enthalpy-increasing gas supplement, and improves the operation reliability and energy efficiency of the pump body assembly.

Description

Technical Field

[0001] This invention belongs to the field of compressor design technology, specifically relating to a pump assembly, a scroll compressor, and an air conditioner. Background Technology

[0002] Scroll compressors are characterized by their simple structure, small size, light weight, low noise, high mechanical efficiency, and stable operation. However, when the ambient temperature is low, the refrigerant suction specific volume increases, the discharge pressure is higher than the suction pressure, the refrigerant mass flow rate decreases, and the compressor pump body's heat dissipation capacity declines. The heat generated by pump body compression or friction cannot be carried away by the discharge, resulting in high pump body discharge temperature. Under high discharge temperature conditions, the moving scroll, due to its thin base plate, is prone to thermal deformation, leading to adhesive wear between the bottom of the moving scroll and the tooth tip of the stationary scroll. Low-temperature enthalpy-increasing gas injection can reduce the compressor pump body temperature under this condition and decrease the deformation of the moving scroll. However, enthalpy-increasing gas injection can introduce liquid carryover, affecting the stability of the oil film between the pump bodies and thus reducing compressor reliability.

[0003] With the development of high-speed scroll compressors, the demand for high-efficiency and high-reliability compressors is becoming increasingly urgent. How to reduce the deformation of the moving scroll while reducing the phenomenon of liquid carryover during enthalpy increase and gas replenishment has become an urgent problem to be solved in the industry. Summary of the Invention

[0004] Therefore, the present invention provides a pump body assembly, a scroll compressor, and an air conditioner, which can solve the technical problem in the prior art scroll compressors where liquid carry-over occurs due to the method of adding gas to the compression chamber to increase enthalpy in order to cool the pump body assembly and reduce the deformation of the moving plate, which affects the stability of the oil film in the pump body and thus reduces the reliability of compressor operation.

[0005] To address the aforementioned problems, the present invention provides a pump assembly comprising a paired moving scroll and a stationary scroll, wherein a compression chamber is formed between the moving scroll and the stationary scroll, and the stationary scroll has an enthalpy-increasing port for supplying gas to a first region within the compression chamber via the enthalpy-increasing port; a cooling cavity is formed within the moving scroll, the cooling cavity having an inlet and an outlet, the inlet having an inlet communication position at least partially overlapping with the enthalpy-increasing port and an inlet closed position disconnected from the enthalpy-increasing port, the outlet having an outlet communication position communicating with a second region of the compression chamber and an outlet closed position disconnected from the second region, wherein the pressure of the refrigerant in the first region is higher than the pressure of the refrigerant in the second region, during the translation of the moving scroll, the inlet alternately switches between the inlet communication position and the inlet closed position, and the outlet alternately switches between the outlet communication position and the outlet closed position, wherein when the inlet is in the inlet communication position, the outlet is in the outlet closed position, and when the inlet is in the inlet closed position, the outlet is in the outlet communication position.

[0006] In some implementations...

[0007] The enthalpy-increasing port is constructed on the stationary disk substrate of the stationary vortex disk, the outlet is constructed on the moving disk substrate of the moving vortex disk, and the inlet is constructed on the moving vortex tooth of the moving vortex disk, wherein the inlet passes through the tooth tip of the moving vortex tooth along the axial direction of the moving vortex disk.

[0008] In some implementations...

[0009] The bottom surface of the moving scroll has a connecting sleeve that is pivotally connected to the crankshaft, and the cooling cavity is annular, which surrounds the outer circumference of the connecting sleeve.

[0010] In some implementations...

[0011] The first region and the second region are located on opposite sides of the base circle of the stationary vortex tooth on the stationary vortex disk, and the second region is closer to the air intake of the pump body assembly than the first region.

[0012] In some implementations...

[0013] The bottom surface of the moving scroll has an open annular groove surrounding the connecting sleeve. An annular plate is sealed at the opening of the annular groove, and the open annular groove, after being sealed by the annular plate, constitutes the cooling cavity.

[0014] In some implementations...

[0015] The ring plate and the opening of the annular groove are interference-fitted.

[0016] In some implementations...

[0017] The ring plate is made of the same material as the moving scroll.

[0018] In some embodiments, the pump body assembly further includes:

[0019] The upper support has a supporting cylinder formed in the central area. During the translational operation of the moving vortex, the supporting cylinder is at least partially supported on the bottom surface of the ring plate.

[0020] The present invention also provides a scroll compressor, including the pump body assembly described above.

[0021] The present invention also provides an air conditioner including the scroll compressor described above.

[0022] The present invention provides a pump assembly, a scroll compressor, and an air conditioner, which have the following characteristics:

[0023] Beneficial effects:

[0024] By setting a cooling cavity inside the moving scroll and switching the positions of its inlet and enthalpy-increasing port, as well as the position of its outlet relative to the second region, at least a portion of the medium-pressure make-up gas refrigerant introduced at the enthalpy-increasing port can be introduced into the cooling cavity. On the one hand, this can cool down the moving scroll and effectively reduce the deformation of the moving scroll during operation. On the other hand, it can convert the liquid phase component in the medium-pressure make-up gas refrigerant into gaseous refrigerant before discharging it into the compression chamber, thereby reducing the proportion of liquid phase in the make-up gas at the enthalpy-increasing port and reducing the probability of liquid carrying phenomenon in the make-up gas. This improves the operational reliability and energy efficiency of the pump body assembly and the compressor using it.

[0025] By extending the inlet from the tip of the moving vortex tooth along the axial direction of the moving vortex disk into the cooling cavity inside the moving disk base plate, and following the translation of the moving vortex disk, the relative position of the inlet and the enthalpy-increasing port on the stationary disk base plate can be changed, thereby enabling the inlet to switch between the aforementioned intake connection position and intake closed position; the outlet is constructed on the moving disk base plate, and its opening and closing can be achieved through its relative position with the stationary vortex tooth.

[0026] By setting the first region and the second region on both sides of the base circle of the stationary vortex tooth, the inlet and outlet are positioned at the farthest point, thereby ensuring that the refrigerant can flow through the cooling cavity on both sides with approximately equal paths, thus ensuring relatively balanced cooling of the moving vortex.

[0027] By using the same material for the ring plate and the moving scroll, since the same material has the same thermal expansion rate after being heated, the deformation of the two is approximately equal when the moving scroll heats up. This ensures the reliable and stable interference fit between the two, and prevents the ring plate from bulging or deforming or coming out of the open ring groove due to different deformation amounts.

[0028] The top surface of the support cylinder on the upper bracket can support the bottom surface of the ring plate. At this time, a wear-resistant layer or a lubricating layer can be formed on the bottom surface of the ring plate. While the upper bracket supports the moving scroll, it reduces the motion energy consumption of the moving scroll and improves the service life of the moving scroll. Attached Figure Description

[0029] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0030] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0031] Figure 1 This is a schematic diagram of the internal structure of the scroll compressor in an embodiment of the present invention;

[0032] Figure 2 for Figure 1 A partial structural diagram;

[0033] Figure 3 for Figure 1 A schematic diagram of the structure of the moving scroll plate in the diagram;

[0034] Figure 4 This is a schematic diagram showing the relative position of the moving scroll plate with the stationary scroll plate when the inlet is in the air intake connection position and the outlet is in the air outlet closed position. In this state, the medium-pressure refrigerant introduced by the enthalpy-increasing port can enter the cooling cavity through the inlet.

[0035] Figure 5 This is a schematic diagram showing the relative position of the moving scroll plate with the stationary scroll plate when the inlet is in the air intake closed position and the outlet is in the air outlet connected position. In this state, the refrigerant entering the cooling cavity is discharged after exchanging heat with the moving scroll plate.

[0036] The reference numerals in the attached figures are as follows:

[0037] 1. Moving scroll; 11. Cooling cavity; 111. Inlet; 112. Outlet; 113. Ring plate; 12. Moving scroll teeth; 13. Moving scroll base plate; 14. Connecting sleeve; 2. Stationary scroll; 21. Enthalpy-increasing port; 22. Stationary scroll teeth; 23. Stationary scroll base plate; 3. Intake port; 100. Crankshaft; 101. Upper bracket; 1011. Support cylinder; 102. Outer shell; 1021. Intake pipe; 1022. Enthalpy-increasing pipe; 103. Cross slip ring; 104. Lower bracket; 1051. Motor rotor; 1052. Motor stator; 106. Lower support ring. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0041] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0043] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0044] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0045] See also Figures 1 to 5As shown, according to an embodiment of the present invention, a pump body assembly is provided, including a paired moving scroll 1 and a stationary scroll 2. A compression cavity is formed between the moving scroll 1 and the stationary scroll 2. Specifically, the moving scroll 1 and the stationary scroll 2 are mounted opposite each other on an upper bracket 101 with a phase angle difference of 180°. The moving scroll 1 moves under the drive of the crankshaft 100 and meshes with the stationary scroll 2 to form a series of mutually isolated crescent-shaped sealing cavities with continuously changing volumes. The aforementioned compression cavity is also the crescent-shaped sealing cavity. The stationary scroll 2 is fixed to the upper bracket 101 by screws and fasteners. On the top surface of the upper support 101 (i.e., the top surface of the upper support 101), the stationary scroll 2 has an enthalpy-increasing port 21 for replenishing air into the first region of the compression chamber. It is understood that the enthalpy-increasing port 21 is connected to the enthalpy-increasing component of the compressor. A cooling cavity 11 is formed within the moving scroll 1. The cooling cavity 11 has an inlet 111 and an outlet 112. The inlet 111 has an intake communication position that at least partially overlaps with the enthalpy-increasing port 21 and an intake shut-off position that cuts off communication with the enthalpy-increasing port 21. The outlet 112 has a... The second region of the compression chamber is connected to an outlet connection position and an outlet closure position that cuts off the connection with the second region. The pressure of the refrigerant in the first region is higher than that in the second region. During the translation of the moving scroll 1, the inlet 111 alternates between the inlet connection position and the inlet closure position (i.e., intermittent air intake), and the outlet 112 alternates between the outlet connection position and the outlet closure position (i.e., intermittent air exhaust). When the inlet 111 is in the inlet connection position, the outlet 112 is in the outlet closure position, and when the inlet 111 is in the inlet closure position, the outlet 112 is in the outlet connection position. That is, the refrigerant in the cooling cavity 11 can be alternately drawn in and discharged. It should be noted that the selection of the aforementioned first region and second region should take into account the pressure of the medium-pressure refrigerant introduced at the corresponding enthalpy-increasing port 21, the pressure of the refrigerant in the cooling cavity 11 when it needs to be discharged, and the pressure of the second region at the outlet 112. The pressure difference between the three should be sufficient to allow the refrigerant to be alternately drawn in and discharged.

[0046] In this technical solution, by setting a cooling cavity 11 inside the moving scroll 1 and switching the positions of its inlet 111 and enthalpy-increasing port 21, as well as the position of its outlet 112 relative to the second region, at least a portion of the medium-pressure make-up gas refrigerant introduced at the enthalpy-increasing port 21 is introduced into the cooling cavity 11. On the one hand, this can cool down the moving scroll 1, effectively reducing the deformation of the moving scroll 1 during operation. On the other hand, it can convert the liquid phase component in the medium-pressure make-up gas refrigerant into gas phase refrigerant before discharging it into the compression chamber, thereby reducing the proportion of liquid phase in the make-up gas at the enthalpy-increasing port 21 and reducing the probability of liquid carrying phenomenon in the make-up gas, thus improving the operational reliability and energy efficiency of the pump body assembly and the compressor using it.

[0047] In a preferred embodiment, see [link to previous document] Figure 2 and Figure 3 As shown, the enthalpy-increasing port 21 is constructed on the stationary plate base 23 of the stationary volute 2, which can facilitate the sealing connection between the enthalpy-increasing port 21 and the enthalpy-increasing tube of the external enthalpy-increasing component. The outlet 112 is constructed on the moving plate base 13 of the moving volute 1, and the aforementioned cooling cavity 11 is constructed inside the moving plate base 13. The inlet 111 is constructed on the moving volute tooth 12 of the moving volute 1, and the inlet 111 passes through the tooth tip of the moving volute tooth 12 along the axial direction of the moving volute 1, that is, the end face of the moving volute tooth 12 that mates with the bottom surface of the stationary plate base 23 of the stationary volute 2.

[0048] In this technical solution, by extending the inlet 111 from the tip of the moving volute 12 along the axial direction of the moving volute 1 into the cooling cavity 11 within the moving plate substrate 13, and following the translational movement of the moving volute 1, the relative position of the inlet 111 and the enthalpy-increasing port 21 on the stationary plate substrate 23 can be changed, thereby enabling the inlet 111 to switch between the aforementioned intake connection position and intake closed position. It is understood that when the inlet 111 and the enthalpy-increasing port 21 are in a disconnected connection state, the medium-pressure supplementary refrigerant of the enthalpy-increasing port 21 can still enter the first area to increase the enthalpy of the pump assembly and cool it down, thereby ensuring the energy efficiency optimization of the pump assembly and the compressor. When the enthalpy-increasing port 21 and the inlet 111 are in a connected state, the medium-pressure supplementary refrigerant introduced at the enthalpy-increasing port 21 enters the cooling cavity 11 at least partially under the action of the pressure difference, thereby achieving the cooling of the moving volute 1. The outlet 112 is constructed on the moving disk base plate 13, and its opening and closing can be achieved by its relative position with the stationary vortex tooth 22. Specifically, when the stationary vortex tooth 22 blocks the outlet 112, the outlet 112 is in the gas outlet closed position. When the stationary vortex tooth 22 does not completely block the outlet 112, the refrigerant in the cooling cavity 11 is discharged into the compression cavity corresponding to the second region under the action of pressure difference, thereby realizing the gas replenishment and enthalpy increase of the pump body assembly.

[0049] See details Figure 4 As shown in the figure, inlet 111 and enthalpy-increasing port 21 coincide, meaning inlet 111 is in the intake connection position. At this time, the low-temperature makeup gas (medium pressure) refrigerant passes through enthalpy-increasing port 21 and enters the cooling cavity 11 through inlet 111. Simultaneously, outlet 112 intersects with the stationary vortex teeth 22 of stationary vortex disk 2, and outlet 112 is in the outlet closed position. See details. Figure 5As shown in the figure, when the moving vortex 1 continues to move to the state shown in the figure, the inlet 111 is separated from the area of ​​the enthalpy-increasing port 21, and the low-temperature replenishing refrigerant stops entering the cooling cavity 11 (note that at this time, the low-temperature replenishing refrigerant of the enthalpy-increasing port 21 can still be directly replenished into the first area of ​​the compression cavity), while the stationary vortex tooth 22 releases the obstruction and blockage of the outlet 112, that is, the outlet 112 is connected to the second area of ​​the compression cavity, and the refrigerant in the cooling cavity 11 is discharged into the compression cavity to achieve the replenishing and enthalpy-increasing effect of this part of the refrigerant.

[0050] It is understandable that the specific locations of the aforementioned first and second regions can be reasonably selected according to actual objective needs. Theoretically, as long as it can be ensured that the medium-pressure refrigerant at the enthalpy-increasing port 21 can enter the aforementioned cooling cavity 11 under the action of pressure difference, and that the refrigerant after heat exchange in the cooling cavity 11 can enter the second region under the action of pressure difference, it is acceptable. The aforementioned second region can generally be the outer cavity of the compression chamber, while the first region can generally be the inner cavity of the compression chamber. The aforementioned inner cavity and outer cavity refer to the radial inward and outward directions of each cavity relative to the exhaust port (center) of the pump body assembly.

[0051] In some embodiments, the bottom surface of the moving scroll 1 has a connecting sleeve 14 pivotally connected to the crankshaft 100, and the cooling cavity 11 is annularly arranged around the outer circumference of the connecting sleeve 14.

[0052] In this technical solution, an annular cooling cavity 11 is arranged around the connecting sleeve 14, which can ensure relatively comprehensive cooling of the moving volute 1. Specifically, the aforementioned cooling cavity 11 should cover the bottom surface of the moving volute 1 and the area where the moving volute teeth 12 are set, excluding the corresponding part where the aforementioned connecting sleeve 14 is set.

[0053] In some embodiments, the first region and the second region are located on opposite sides of the base circle of the stationary vortex tooth 22 on the stationary vortex disk 2, and the second region is closer to the air intake 3 of the pump body assembly than the first region.

[0054] In this technical solution, by setting the first and second regions on opposite sides of the base circle of the stationary vortex tooth 22, the inlet 111 and outlet 112 are positioned at their furthest points relative to each other. This ensures that the refrigerant flows through the cooling cavity 11 with approximately equal left and right paths, guaranteeing relatively balanced cooling of the moving vortex 1. The second region is closer to the intake port 3, ensuring lower refrigerant pressure within this region, thus facilitating the achievement of the driving pressure differential for the medium-pressure supplementary refrigerant.

[0055] See details Figure 3As shown, in a specific embodiment, the bottom end face of the moving scroll 1 has an open annular groove (not indicated in the figure) surrounding the connecting sleeve 14. An annular plate 113 is sealed at the opening of the annular groove, and the open annular groove sealed by the annular plate 113 constitutes the cooling cavity 11.

[0056] In this technical solution, the cooling cavity 11 is formed by combining an open annular groove with an annular plate 113, which facilitates the manufacturing of the cooling cavity 11 within the moving scroll plate 1.

[0057] In a preferred embodiment, the ring plate 113 and the opening of the open annular groove are interference-fitted. Specifically, the interference fit between the ring plate 113 and the opening of the open annular groove can be achieved by cold pressing, which is a mature process and can reduce manufacturing costs.

[0058] In a preferred embodiment, the ring plate 113 is made of the same material as the moving scroll plate 1.

[0059] In this technical solution, by using the same material to make the ring plate 113 and the moving scroll 1, since the same material has the same thermal expansion rate after being heated, the deformation of the two is approximately equal when the moving scroll 1 heats up. This ensures the reliable and stable interference fit between the two, and prevents the ring plate 113 from bulging or deforming or coming out of the open ring groove due to different deformation amounts.

[0060] See details Figure 2 As shown above, the pump body assembly also includes an upper bracket 101, and a support cylinder 1011 is formed in the central region of the upper bracket 101. During the translational operation of the moving scroll 1, the support cylinder 1011 is at least partially supported on the bottom surface of the ring plate 113.

[0061] In this technical solution, the top surface of the support cylinder 1011 on the upper bracket 101 can support the bottom surface of the ring plate 113. At this time, a wear-resistant layer or a lubricating layer (e.g., spraying wear-resistant material or embedding lubricating material) can be formed on the bottom surface of the ring plate 113. While the upper bracket 101 supports the moving scroll 1, the motion energy consumption of the moving scroll 1 is reduced and the service life of the moving scroll 1 is increased. It should be noted that since the ring plate 113 and the moving plate substrate 13 are assembled, when processing the aforementioned wear-resistant layer or lubricating layer, only the ring plate 113 needs to be processed, and the entire moving scroll 1 does not need to be processed, thus simplifying the corresponding processing technology.

[0062] According to an embodiment of the present invention, a scroll compressor is also provided, including the pump body assembly described above. Specifically, a cross slip ring 103 is provided between the upper bracket 101 and the moving scroll 1 to ensure the rotation of the moving scroll 1. The motor rotor 1051 is mounted on the crankshaft 100, and the motor stator 1052 is heat-fitted into the housing 102 (understandably, the housing 102 includes an intermediate cylinder and upper and lower covers at both ends). The upper bracket 101 is fixed to the housing 102 by spot welding, and the lower bracket 104 is fixed to the lower support ring 106 by screws. The lower support ring 106 is fixed to the upper bracket 101 by screw fasteners.

[0063] When the compressor is running, the motor (including the motor stator 1052 and the motor rotor 1051) drives the crankshaft 100 to rotate. The crank of the crankshaft 100 drives the moving scroll 1 to move. Under the anti-rotation restriction of the cross slip ring 103, the moving scroll 1 moves around the center of the crankshaft 100 with a fixed radius. The refrigerant entering from the suction pipe 1021 is drawn into the crescent-shaped suction chamber formed between the scroll teeth of the moving scroll 1 and the stationary scroll 2. After compression, it is discharged from the exhaust port of the stationary scroll 2 and enters the cavity between the upper cover and the stationary scroll 2. Then, it enters the cavity between the upper support 101 and the motor through the exhaust groove of the stationary scroll 2 and the upper bracket 101. Part of it enters the lower end of the motor through the flow groove between the motor and the outer casing 102. Finally, the high-pressure exhaust refrigerant is discharged through the exhaust pipe.

[0064] During compressor operation, the low-temperature refrigerant enters the enthalpy-increasing port 21 of the stationary scroll 2 through the enthalpy-increasing pipe 1022, and then enters the cooling cavity 11 of the moving scroll base plate 13 of the moving scroll 1 through the axial inlet 111 to cool the moving scroll base plate 13. This reduces the thermal deformation of the moving scroll base plate 13 caused by the high exhaust temperature during compressor operation, and reduces the risk of adhesive wear caused by thermal deformation contact between the stationary scroll teeth 22 of the stationary scroll 2 and the bottom of the moving scroll base plate 13. At the same time, after some of the low-temperature refrigerant flows through the cooling cavity 11 and is heated, the liquid carryover rate of the refrigerant is reduced, which reduces the impact of excessive liquid carryover on the lubricating oil film between the pump bodies, and ultimately effectively improves the reliability of the scroll compressor operation.

[0065] In addition, by opening a new enthalpy-increasing airflow path to reduce the thermal deformation of the moving plate substrate 13, the leakage problem caused by the conventional method of increasing the gap between the tooth bottom of the moving scroll 1 and the tooth top of the stationary scroll 2 is avoided. This is conducive to the small gap design of the scroll tooth bottom, reduces the leakage between the scroll teeth, reduces the operating power consumption of the scroll compressor, and improves the operating energy efficiency of the scroll compressor.

[0066] According to an embodiment of the present invention, an air conditioner is also provided, including the scroll compressor described above.

[0067] The above description is merely 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 principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A pump body assembly comprising a paired moving scroll (1) and a stationary scroll (2), wherein a compression cavity is formed between the moving scroll (1) and the stationary scroll (2), characterized in that, The stationary volute (2) has an enthalpy-increasing port (21) for replenishing air into the first region of the compression chamber via the enthalpy-increasing port (21); a cooling cavity (11) is formed inside the moving volute (1), the cooling cavity (11) has an inlet (111) and an outlet (112), the inlet (111) has an intake communication position that at least partially overlaps with the enthalpy-increasing port (21) and an intake closed position that cuts off communication with the enthalpy-increasing port (21), the outlet (112) has an exhaust communication position that communicates with the second region of the compression chamber and an exhaust communication position that cuts off communication with the second region. In the air outlet closed position, the pressure of the refrigerant in the first region is higher than that in the second region. During the translation of the moving scroll (1), the inlet (111) alternates between the air inlet connection position and the air inlet closed position, and the outlet (112) alternates between the air outlet connection position and the air outlet closed position. When the inlet (111) is in the air inlet connection position, the outlet (112) is in the air outlet closed position, and when the inlet (111) is in the air inlet closed position, the outlet (112) is in the air outlet connection position.

2. The pump body assembly according to claim 1, characterized in that, The enthalpy-increasing port (21) is constructed on the stationary disk base plate (23) of the stationary vortex disk (2), the outlet (112) is constructed on the moving disk base plate (13) of the moving vortex disk (1), and the inlet (111) is constructed on the moving vortex tooth (12) of the moving vortex disk (1), wherein the inlet (111) passes through the tooth tip of the moving vortex tooth (12) along the axial direction of the moving vortex disk (1).

3. The pump body assembly according to claim 2, characterized in that, The bottom surface of the moving scroll (1) has a connecting sleeve (14) that is pivotally connected to the crankshaft (100), and the cooling cavity (11) is annular around the outer circumference of the connecting sleeve (14).

4. The pump body assembly according to claim 3, characterized in that, The first region and the second region are located on opposite sides of the base circle of the static vortex tooth (22) on the static vortex disk (2), and the second region is closer to the air intake (3) of the pump body assembly than the first region.

5. The pump body assembly according to claim 3, characterized in that, The bottom end face of the moving scroll (1) has an open annular groove surrounding the connecting sleeve (14). A ring plate (113) is sealed at the opening of the open annular groove. The open annular groove, after being sealed by the ring plate (113), constitutes the cooling cavity (11).

6. The pump body assembly according to claim 5, characterized in that, The annular plate (113) and the opening of the annular groove are interference-fitted.

7. The pump body assembly according to claim 6, characterized in that, The ring plate (113) is made of the same material as the moving scroll (1).

8. The pump body assembly according to claim 5, characterized in that, Also includes: The upper support (101) has a support cylinder (1011) formed in the central region. During the translational operation of the moving vortex (1), the support cylinder (1011) is at least partially supported on the bottom surface of the ring plate (113).

9. A scroll compressor, characterized in that, Includes the pump body assembly according to any one of claims 1 to 8.

10. An air conditioner, characterized in that, Includes the scroll compressor as described in claim 9.

Images