Compressor assembly and air conditioning system with same

Abstract

The compressor assembly comprises a compressor and a capillary tube, the compressor comprises a shell, a pump body structure and an air supplementing pipeline, the pump body structure is assembled in the shell, the air supplementing pipeline penetrates through the shell and then is controllably communicated with a compression cavity of the pump body structure, the capillary tube is wound on the outer surface of the shell, and the capillary tube is arranged on the outer surface of the shell. An outlet of the capillary tube communicates with the air supplementing pipeline. According to the air conditioning system, after the enthalpy-increased refrigerant in the air conditioning system enters the capillary tube wound on the compressor, the capillary tube throttles the enthalpy-increased refrigerant, and meanwhile, the enthalpy-increased refrigerant exchanges heat with the shell of the compressor, so that the enthalpy-increased refrigerant can absorb heat on the shell of the compressor, and the heat on the shell of the compressor can be absorbed under the dual effects of throttling and heat absorption; the enthalpy-increasing refrigerant can be promoted to be gasified, the gasified enthalpy-increasing refrigerant is supplemented into the compression cavity of the pump body structure after being drained through the air supplementing pipeline, liquid can be prevented from being carried by supplemented air, and meanwhile heat generated in the working process of the compressor is effectively utilized.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and particularly relates to a compressor assembly and an air conditioning system having the same. Background Art

[0002] Scroll compressors have prominent advantages such as small volume and simple structure, and are widely used in fields such as household air conditioners, commercial air conditioners, and low-temperature heat pumps. In the industry, by setting enthalpy increase on such compressors, the throttled medium-pressure refrigerant is guided to the compressor pump body working chamber through the enthalpy increase channel, which not only further expands the operating range of the compressor, but also improves the refrigeration / heating capacity and the performance of the compressor. However, there is a risk of liquid carryover during air injection when the compressor increases enthalpy, and the compressor is the largest heat source during the operation of the air conditioning system, and the heat generated during the operation of the compressor is not effectively utilized. Summary of the Invention

[0003] Therefore, the present invention provides a compressor assembly, which can solve the technical problems that there is a risk of liquid carryover during air injection when the existing compressor increases enthalpy and the heat generated during the operation of the compressor is not effectively utilized.

[0004] To solve the above problems, the present invention provides a compressor assembly, including a compressor and a capillary tube. The compressor includes a housing, a pump body structure, and a gas supply pipeline. The pump body structure is assembled in the housing, and the gas supply pipeline penetrates through the housing and is controllably communicated with the compression chamber of the pump body structure. The capillary tube is wound on the outer surface of the housing, and the refrigerant flowing through the capillary tube can exchange heat with the housing. The outlet of the capillary tube is communicated with the gas supply pipeline.

[0005] In some embodiments, the compressor further includes an electric motor, the electric motor is assembled in the housing, and the winding position of the capillary tube on the housing corresponds to the position of the electric motor.

[0006] In some embodiments, the refrigerant entering the gas supply pipeline is configured to be supplemented into the compression chamber after exchanging heat with the electric motor.

[0007] In some embodiments, the electric motor includes a stator core, and a stator heat exchange channel is formed on the stator core. The gas supply pipeline penetrates through the stator heat exchange channel.

[0008] In some embodiments, the pump body structure includes a cylinder, the compression chamber is formed on the cylinder, and the refrigerant entering the gas supply pipeline is configured to be supplemented into the compression chamber after exchanging heat with the exhaust side of the cylinder.

[0009] In some embodiments, the number of the cylinders is two, and the two cylinders are stacked along the axial direction of the pump body structure, and the refrigerant entering the air supply pipeline can be split and supplied into the two cylinders.

[0010] In some embodiments, the pump body structure further includes a partition plate, the partition plate is assembled between the two cylinders, and partition plate heat exchange channels are respectively formed on two sides of the partition plate facing the two cylinders. The two partition plate heat exchange channels respectively correspond to the exhaust sides of the two cylinders. One ends of the two partition plate heat exchange channels are respectively controllably communicated with the compression cavities of the two cylinders, and the other ends of the two partition plate heat exchange channels are both communicated with the air supply pipeline.

[0011] In some embodiments, the angle formed between the two ends of any one of the partition plate heat exchange channels with respect to the center of the partition plate is a, and 30° ≤ a ≤ 180°.

[0012] The present invention also provides an air conditioning system, including the compressor assembly described above.

[0013] In some embodiments, the air conditioning system further includes an evaporator, a condenser and a first throttling element. The compressor, the evaporator, the condenser and the first throttling element together form a refrigerant circulation loop. The inlet of the capillary tube is connected to the flow path between the evaporator and the first throttling element through a diversion pipeline, and a control valve is arranged on the diversion pipeline.

[0014] A compressor assembly provided by the present invention and an air conditioning system having the same have the following beneficial effects:

[0015] When the enthalpy-increasing refrigerant in the air conditioning system enters the capillary tube wound on the compressor, while the capillary tube throttles the enthalpy-increasing refrigerant, the enthalpy-increasing refrigerant also exchanges heat with the shell of the compressor, so that the enthalpy-increasing refrigerant can absorb the heat on the shell of the compressor. Thus, under the dual actions of throttling and heat absorption, the enthalpy-increasing refrigerant can be promoted to be gasified. The gaseous enthalpy-increasing refrigerant is led through the air supply pipeline and supplemented into the compression cavity of the pump body structure, which can avoid liquid carry-over during air supply, and at the same time, the heat generated during the operation of the compressor is also effectively utilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0017] Figure 1 It is a cross-sectional view of the compressor assembly according to an embodiment of the present invention;

[0018] Figure 2 Schematic structural diagram of the compressor assembly according to an embodiment of the present invention;

[0019] Figure 3 Schematic structural diagram of the cylinder of the compressor of the compressor assembly according to an embodiment of the present invention;

[0020] Figure 4 Top view of the partition of the compressor of the compressor assembly according to an embodiment of the present invention;

[0021] Figure 5 Schematic structural diagram of the partition of the compressor of the compressor assembly according to an embodiment of the present invention;

[0022] Figure 6 Schematic diagram of the air-conditioning system according to an embodiment of the present invention;

[0023] Figure 7 Schematic diagram of a compressor of the prior art;

[0024] Figure 8 Cross-sectional view of a compressor of the prior art;

[0025] Figure 9 For Figure 8 Enlarged schematic view of part A of the compressor of the prior art in

[0026] Figure 10 Schematic diagram of an air-conditioning system of the prior art.

[0027] The reference numerals are represented as:

[0028] 1, capillary tube; 2, housing; 3, pump body structure; 31, cylinder; 32, partition; 33, upper flange; 34, lower flange; 35, air supplement pin valve; 4, air supplement pipeline; 5, stator core; 6, partition heat exchange channel; 7, evaporator; 8, condenser; 9, first throttling element; 10, diversion pipeline; 11, control valve; 12, plug; 13, second throttling element; 14, plate heat exchanger. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way serves as a limitation to the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0031] For ease of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures for the device. For example, if the device in the figures is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above" can include both the orientation of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0032] In addition, it should be noted that the use of terms such as "first", "second" to limit components is only for the convenience of differentiating the corresponding components. Without additional statement, the above terms have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0033] Referring to Figures 1 to 10 As shown, according to an embodiment of the present invention, a compressor assembly is provided, which includes a compressor and a capillary tube 1. The compressor includes a housing 2, a pump body structure 3, and a supplementary gas pipeline 4. The pump body structure 3 is assembled inside the housing 2. The supplementary gas pipeline 4 penetrates through the housing 2 and is controllably communicated with the compression chamber of the pump body structure 3. The capillary tube 1 is wound around the outer surface of the housing 2. The refrigerant flowing through the capillary tube 1 can exchange heat with the housing 2. The outlet of the capillary tube 1 is communicated with the supplementary gas pipeline 4.

[0034] In this technical solution, when the enthalpy-increasing refrigerant in the air-conditioning system enters the capillary tube 1 wound around the compressor, while the capillary tube 1 throttles the enthalpy-increasing refrigerant, the enthalpy-increasing refrigerant also exchanges heat with the housing 2 of the compressor, enabling the enthalpy-increasing refrigerant to absorb the heat on the housing 2 of the compressor. Thus, with the dual effects of throttling and heat absorption, the enthalpy-increasing refrigerant can be promoted to gasify. The gaseous enthalpy-increasing refrigerant is introduced into the compression chamber of the pump body structure 3 through the gas supply pipeline 4, which can avoid liquid carry-over during gas replenishment. At the same time, the heat generated during the operation of the compressor is also effectively utilized.

[0035] Referring to Figure 1 and Figure 2 As shown, the compressor further includes an electric motor, and the electric motor is assembled inside the housing 2. The winding position of the capillary tube 1 on the housing 2 corresponds to the position of the electric motor.

[0036] In this embodiment, the electric motor is the largest heat source of the compressor. When the winding position of the capillary tube 1 on the housing 2 corresponds to the position of the electric motor, it can ensure that the enthalpy-increasing refrigerant exchanges heat with the hottest part on the housing 2, and the heat exchange effect is better.

[0037] As a specific implementation manner, the refrigerant entering the gas supply pipeline 4 is configured to be replenished into the compression chamber after heat exchange with the electric motor.

[0038] In this technical solution, the refrigerant entering the gas supply pipeline 4 can further promote the gasification of the enthalpy-increasing refrigerant after directly exchanging heat with the electric motor inside the compressor. At the same time, the heat exchange process also enables the enthalpy-increasing refrigerant to cool the electric motor, thereby improving the efficiency of the electric motor and enhancing the reliability of the electric motor.

[0039] Referring to Figure 1 As shown, the electric motor includes a stator core 5, and a stator heat exchange channel is formed on the stator core 5. The gas supply pipeline 4 passes through the stator heat exchange channel.

[0040] In this embodiment, the stator core 5 is a component in the electric motor that generates a large amount of heat and is stationary. When the gas supply pipeline 4 passes through the stator heat exchange channel on the stator core 5, it can not only ensure the safety of the pipeline routing of the gas supply pipeline 4 but also ensure sufficient heat exchange between the enthalpy-increasing refrigerant and the electric motor.

[0041] As a specific implementation manner, the pump body structure 3 includes a cylinder 31, and a compression chamber is formed on the cylinder 31. The refrigerant entering the gas supply pipeline 4 is configured to be replenished into the compression chamber after heat exchange with the exhaust side of the cylinder 31.

[0042] In this technical solution, referring to Figure 3As shown, taking the central plane of the sliding vane groove on the cylinder 31 as the demarcation line, the left side of the central plane of the sliding vane groove is the exhaust side of the cylinder 31. Due to the influence of the compression process and frictional heat on the exhaust side of the cylinder 31, its temperature is relatively high. When the refrigerant entering the supplementary gas pipeline 4 is configured to exchange heat with the exhaust side of the cylinder 31, it can further promote the gasification of the enthalpy-increasing refrigerant. At the same time, the heat exchange process also enables the enthalpy-increasing refrigerant to cool the cylinder 31, thereby cooling the pump body structure, reducing the pump body temperature can effectively improve the adiabatic efficiency of the compressor, reduce the suction heating, increase the suction density, and then improve the refrigeration capacity and reduce the indicated work during the compression process of the pump body, and finally reduce the compressor power and improve the energy efficiency.

[0043] See Figure 1 As shown, the number of cylinders 31 is two, and the two cylinders 31 are stacked along the axial direction of the pump body structure 3. The refrigerant entering the supplementary gas pipeline 4 can be shunted and supplemented into the two cylinders 31.

[0044] In this technical solution, the compressor of the present application is a twin-cylinder compressor, and the twin-cylinder compressor has a higher compression efficiency. Finally, the enthalpy-increasing refrigerant will be shunted and supplemented into the two cylinders 31. It can be understood that during the throttling process of the enthalpy-increasing refrigerant, it first exchanges heat with the housing, then exchanges heat with the stator core 5, and finally exchanges heat with the exhaust side of the cylinder 31. This makes the refrigerant shunted and supplemented into the two cylinders 31 completely gasified, and there will be no liquid carried in the supplementary gas. Moreover, the fully heat-exchanged enthalpy-increasing refrigerant becomes a gaseous medium-temperature and medium-pressure refrigerant, which not only avoids liquid carried in the supplementary gas but also ensures the supplementary gas volume, further improving the reliability of the compressor.

[0045] Combined with see Figure 1 、 Figure 4 and Figure 5 As shown in, the pump body structure 3 further includes a partition plate 32. The partition plate 32 is assembled between the two cylinders 31. Partition heat exchange channels 6 are respectively constructed on both sides of the partition plate 32 facing the two cylinders 31. The two partition heat exchange channels 6 respectively correspond to the exhaust sides of the two cylinders 31. One ends of the two partition heat exchange channels 6 are controllably communicated with the compression cavities of the two cylinders 31 respectively, and the other ends of the two partition heat exchange channels 6 are both communicated with the supplementary gas pipeline 4.

[0046] In this embodiment, by constructing partition heat exchange channels 6 on both the upper and lower sides of the partition plate 32, when the enthalpy-increasing refrigerant in the supplementary gas pipeline 4 enters the two partition heat exchange channels 6 respectively, the refrigerant in the two partition heat exchange channels 6 will directly contact and exchange heat with the exhaust sides of the upper and lower cylinders 31 respectively, thereby realizing the heating of the enthalpy-increasing refrigerant by the exhaust sides of the cylinders 31 and the cooling of the upper and lower cylinders 31 by the enthalpy-increasing refrigerant.

[0047] See Figure 1As shown, the pump body structure further includes an upper flange 33 and a lower flange 34. The two cylinders 31 are respectively an upper cylinder and a lower cylinder. The upper flange 33 is assembled on the upper side of the upper cylinder, and the lower flange 34 is assembled on the lower side of the lower cylinder. Both the upper flange 33 and the upper cylinder are constructed with gas passageways extending in the axial direction. The positions of the two gas passageways correspond to each other and are connected. The make-up gas pipeline 4 passes through the stator heat exchange passage on the stator core 5 and then enters the gas passageway of the upper flange 33. The gas passageway of the upper cylinder is connected to both of the two partition heat exchange passageways 6 on the partition plate 32. See Figure 4 and Figure 5 As shown, two blind holes extending in the radial direction are constructed on the partition plate 32. One of the blind holes connects the first ends of the two partition heat exchange passageways 6, and the other blind hole connects the second ends of the two partition heat exchange passageways 6. The circumferential openings of the two blind holes on the partition plate 32 are blocked by plugs 12. The second ends of the two partition heat exchange passageways 6 form two make-up gas ports, and make-up gas pin valves 35 are arranged at both make-up gas ports. After the enthalpy-increasing refrigerant enters the two partition heat exchange passageways 6 through the make-up gas pipeline 4, it supplies gas to the upper and lower cylinders respectively. When the make-up gas pressure is higher than the pressure in the compression cavity, the upper and lower make-up gas pin valves 35 are opened under the action of the gas pressure difference, and the make-up gas refrigerant enters the compression cavity of the pump body through the make-up gas pin valves 35 for gas supply. The gas supply process is as Figure 1 shown, and can also be seen in Figure 8 and Figure 9 the gas supply process of the compressor of the prior art shown.

[0048] See Figure 4 As shown, the angle formed between the two ends of any one partition heat exchange passageway 6 relative to the center of the partition plate 32 is a, and 30° ≤ a ≤ 180°. This angle range includes the exhaust angle ranges of most operating conditions. The corresponding cylinder 31 within this range is in the high-temperature area of the compression cavity, which can ensure that the enthalpy-increasing refrigerant exchanges heat with the high-temperature area of the cylinder 31, thus ensuring the heat exchange effect. Among them, the partition heat exchange passageway 6 is arc-shaped.

[0049] The present invention also provides an air-conditioning system, including the compressor assembly described above.

[0050] See Figure 6 As shown, the air-conditioning system further includes an evaporator 7, a condenser 8, and a first throttling element 9. The compressor, the evaporator 7, the condenser 8, and the first throttling element 9 together form a refrigerant circulation loop. The inlet of the capillary tube 1 is connected to the flow path between the evaporator 7 and the first throttling element 9 through a diversion pipeline 10.

[0051] In the prior art, as Figure 10As shown, after the refrigerant throttled by the first throttling element 9 flows through the first heat exchange flow path of the plate heat exchanger 14, the gas-liquid two-phase refrigerant with enhanced enthalpy through gas injection will be throttled by the second throttling element 13 and flow through the second heat exchange flow path of the plate heat exchanger 14 to realize the heat exchange between the refrigerant with enhanced enthalpy and the system refrigerant, thereby preventing liquid carry-over during compressor gas injection. In this application, by winding the capillary tube 1 around the outer surface of the housing 2, when the refrigerant with enhanced enthalpy enters the capillary tube 1 wound around the compressor, while the capillary tube 1 throttles the refrigerant with enhanced enthalpy, the refrigerant with enhanced enthalpy will also exchange heat with the housing 2 of the compressor, enabling the refrigerant with enhanced enthalpy to absorb the heat on the housing 2 of the compressor, so that the plate heat exchanger 14 and the second throttling element 13 can be omitted, achieving a better effect of preventing liquid carry-over during gas injection. That is to say, the improved solution of this application not only has a better effect of preventing liquid carry-over during gas injection but also can significantly reduce the production cost.

[0052] See Figure 6 As shown, a control valve 11 is provided on the drainage pipeline 10, and the control valve 11 can be an electromagnetic valve or an electric valve sold on the market. When gas injection with enhanced enthalpy is required, the air-conditioning system will control the control valve 11 to open automatically; when gas injection with enhanced enthalpy is not required, the air-conditioning system will control the control valve 11 to close automatically.

[0053] Finally, it should be noted that the improved solution of winding the capillary tube 1 of this application around the outer surface of the housing 2 is applicable not only to roller compressors but also at least to scroll compressors.

[0054] It is easy for those skilled in the art to understand that, on the premise of no conflict, the advantageous technical features of the above various methods can be freely combined and superimposed.

[0055] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A compressor assembly, characterized in that: The invention comprises a compressor and a capillary tube (1), wherein the compressor comprises a shell (2), a pump body structure (3) and an air supply pipeline (4), wherein the pump body structure (3) is assembled in the shell (2), and the air supply pipeline (4) passes through the shell (2) and is controllably connected to a compression chamber of the pump body structure (3), wherein the capillary tube (1) is wound on the outer surface of the shell (2), and the refrigerant flowing through the capillary tube (1) can exchange heat with the shell (2), and the outlet of the capillary tube (1) is connected to the air supply pipeline (4).

2. The compressor assembly according to claim 1, characterized in that The compressor further comprises a motor, which is assembled in the housing (2), and the winding position of the capillary tube (1) on the housing (2) corresponds to the position of the motor.

3. The compressor assembly according to claim 2, characterized in that The refrigerant entering the air supply pipeline (4) is configured to be supplied into the compression chamber after heat exchange with the motor.

4. The compressor assembly according to claim 3, characterized in that The motor comprises a stator core (5), a stator heat exchange channel is constructed on the stator core (5), and the air supply pipeline (4) runs through the stator heat exchange channel.

5. The compressor assembly according to claim 1, characterized in that The pump body structure (3) comprises a cylinder (31), the compression chamber is formed on the cylinder (31), and the refrigerant entering the air supply pipeline (4) is configured to be supplied into the compression chamber after heat exchange with the exhaust side of the cylinder (31).

6. The compressor assembly according to claim 5, characterized in that The number of the cylinders (31) is two, and the two cylinders (31) are stacked along the axial direction of the pump body structure (3), so that the refrigerant entering the air supply pipeline (4) can be divided and supplied to the two cylinders (31).

7. The compressor assembly according to claim 6, characterized in that The pump body structure (3) further comprises a partition (32), wherein the partition (32) is assembled between the two cylinders (31), and partition heat exchange channels (6) are respectively constructed on both sides of the partition (32) facing the two cylinders (31), and the two partition heat exchange channels (6) respectively correspond to the exhaust sides of the two cylinders (31), and one end of the two partition heat exchange channels (6) is respectively controllably connected to the compression chambers of the two cylinders (31), and the other ends of the two partition heat exchange channels (6) are both connected to the air supply pipeline (4).

8. The air conditioning system according to claim 7, characterized in that: The angle formed between the two ends of any partition plate heat exchange channel (6) relative to the center of the partition plate (32) is a, and 30°≤a≤180°.

9. An air conditioning system, characterized in that: A compressor assembly comprising any one of claims 1 to 8.

10. The air conditioning system according to claim 9, characterized in that: It also includes an evaporator (7), a condenser (8) and a first throttling element (9), wherein the compressor, the evaporator (7), the condenser (8) and the first throttling element (9) together form a refrigerant circulation loop, and the inlet of the capillary tube (1) is connected to the flow path between the evaporator (7) and the first throttling element (9) through a drainage pipeline (10), and a control valve (11) is provided on the drainage pipeline (10).

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