Horizontal scroll compressor

Abstract

The present application provides a horizontal scroll compressor, which comprises a housing, a partition plate and a scroll assembly, the partition plate divides an internal space defined by the housing into a high-pressure side space and a low-pressure side space, a fixed scroll component of the scroll assembly comprises a discharge port for discharging compressed working fluid to the high-pressure side space, the fixed scroll component is movable relative to the housing along the direction of a horizontal center axis by a predetermined distance, wherein a first back pressure cavity and a second back pressure cavity are provided between the fixed scroll component and the partition plate, the first back pressure cavity and the second back pressure cavity are sealed from each other and communicate with the high-pressure side space, the first back pressure cavity is positioned offset towards one side of a horizontal plane where the horizontal center axis is located, the second back pressure cavity is positioned offset towards the other side of the horizontal plane, the first back pressure cavity is at least partially located above the horizontal plane, and the first back pressure cavity further communicates with the discharge port. According to the horizontal scroll compressor of the present application, not only can the excessively high oil circulation rate be avoided, but also the stable and reliable operation of the scroll assembly can be ensured.

Description

TECHNICAL FIELD

[0001] The present invention relates to the field of horizontal scroll compressors, and more particularly, to a horizontal scroll compressor having at least two back pressure chambers. BACKGROUND

[0002] This section provides background information which is not necessarily prior art.

[0003] In a horizontal scroll compressor, it is often necessary to build a function of oil separation and oil return in a high pressure discharge chamber of the compressor to avoid excessive oil circulation rate. A common oil separation function is achieved by providing an oil separation pipe in a top cover. Working fluid discharged from a central discharge port of a scroll mechanism enters the oil separation pipe from an intake port in the upper middle part of the oil separation pipe, and oil separated by the oil separation pipe falls into an oil sump from an oil return hole in the bottom part of the oil separation pipe and returns to a low pressure suction area of the scroll compressor through an oil return passage in the scroll mechanism. Since the central discharge port of the scroll mechanism is relatively close to the oil sump, the working fluid is likely to carry oil from the oil sump away from the scroll compressor.

[0004] If the position of the central discharge port of the scroll mechanism is set eccentrically close to the upper part of the scroll mechanism, for a horizontal scroll compressor using a floating fixed scroll design, the force generated by the discharge port close to the upper part of the scroll mechanism on the fixed scroll does not act on the scroll center, which is likely to cause the fixed scroll to overturn.

[0005] Therefore, there is a need to provide an improved horizontal scroll compressor which not only can improve oil separation efficiency and avoid excessive oil circulation rate, but also can ensure the stability of the floating fixed scroll. SUMMARY

[0006] In this section, a general summary of the invention is provided, but this summary is not intended to be all inclusive of the full scope of the invention or all features of the invention.

[0007] An object of the present invention is to provide an efficient horizontal scroll compressor in which a discharge port of a scroll mechanism is upwardly offset relative to a horizontal plane in which a horizontal center axis of the compressor lies, so as to be away from an oil sump, to reduce the amount of oil carried away from the oil sump by working fluid and / or to improve oil separation efficiency to avoid generating excessively high oil circulation rate.

[0008] Another object of the present invention is to provide a reliable horizontal scroll compressor in which a back of a floating fixed scroll is provided with a back pressure chamber corresponding to a discharge port of a scroll mechanism and upwardly offset relative to a horizontal plane in which a horizontal center axis lies, and is further provided with another back pressure chamber downwardly offset relative to the horizontal plane in which the horizontal center axis lies, so that the floating fixed scroll is in force balance and the compressor is stable in operation.

[0009] According to an aspect of the present application, there is provided a horizontal scroll compressor, the horizontal scroll compressor comprising: a housing defining an internal space of the horizontal scroll compressor; a partition plate separating the internal space into a high-pressure side space and a low-pressure side space; and a scroll assembly including an orbiting scroll member and a fixed scroll member with a series of compression chambers formed therebetween, the fixed scroll member including a discharge port for discharging compressed working fluid from the scroll assembly to the high-pressure side space, wherein the fixed scroll member is configured to be movable relative to the housing in a direction of a horizontal center axis of the horizontal scroll compressor by a predetermined distance, wherein a first back pressure chamber and a second back pressure chamber for urging the fixed scroll member toward the orbiting scroll member are provided between the fixed scroll member and the partition plate, the first back pressure chamber and the second back pressure chamber being sealed from each other, the first back pressure chamber is positioned offset toward one side of a horizontal plane in which the horizontal center axis is located, the second back pressure chamber is positioned offset toward the other side of the horizontal plane, the first back pressure chamber is at least partially located above the horizontal plane, the first back pressure chamber and the second back pressure chamber are both in communication with the high-pressure side space, and the first back pressure chamber is also in communication with the discharge port.

[0010] Optionally, the first back pressure chamber and the second back pressure chamber are positioned diametrically opposite about the horizontal center axis.

[0011] Optionally, in a transverse cross section perpendicular to the horizontal center axis, a product of a cross-sectional area of the first back pressure chamber and a distance of a center of the first back pressure chamber to the horizontal center axis is equal to a product of a cross-sectional area of the second back pressure chamber and a distance of a center of the second back pressure chamber to the horizontal center axis.

[0012] Optionally, the second back pressure chamber is two, in a transverse cross section perpendicular to the horizontal center axis, a line connecting the center of the first back pressure chamber and the centers of the two second back pressure chambers forms an isosceles triangle.

[0013] Optionally, an oil pool containing oil is provided in a region of the high-pressure side space below the horizontal plane, a first orifice in communication with the first back pressure chamber and a second orifice in communication with the second back pressure chamber are formed in the partition plate.

[0014] Optionally, an oil return passage in communication with the second back pressure chamber is provided in the fixed scroll member, the oil in the oil pool is returned to the low-pressure side space via the second orifice, the second back pressure chamber, and the oil return passage.

[0015] Optionally, an oil return passage in direct communication with the low-pressure side space is further formed in the partition plate, the oil in the oil pool is returned to the low-pressure side space via the oil return passage.

[0016] Optionally, a ratio of an inner diameter of the oil return passage to a length thereof is less than or equal to 1:35.

[0017] Optionally, a third back pressure chamber is provided between the fixed vortex component and the partition plate, which is sealed and separated from both the first and second back pressure chambers, and is used to push the fixed vortex component toward the moving vortex component. The third back pressure chamber is connected to the compression chamber with intermediate pressure in the compression chamber, and the first and second back pressure chambers are located in the third back pressure chamber.

[0018] Optionally, the fixed vortex component includes a separate main body and a cover plate, with the exhaust port formed on the cover plate at a position above the horizontal plane.

[0019] Optionally, an oil distribution pipe is provided in the high-pressure side space, the oil distribution pipe having an air inlet located above the horizontal plane and an oil return hole located at the bottom of the oil distribution pipe.

[0020] Optionally, the first back pressure chamber and the second back pressure chamber are located above and below the horizontal plane, respectively.

[0021] Overall, the horizontal scroll compressor according to the present invention has at least the following beneficial effects: by offsetting the exhaust port of the scroll mechanism upward and providing back pressure chambers located on both sides of the horizontal central axis on the back of the floating fixed scroll, it is possible not only to effectively prevent the working fluid from carrying away the oil in the oil sump during the discharge process, but also to prevent the generation of overturning moment on the scroll mechanism, so that the horizontal compressor can operate efficiently and reliably. Attached Figure Description

[0022] The foregoing and other features and characteristics of the invention will become clearer from the following detailed description with reference to the accompanying drawings, which are by way of example only and are not necessarily drawn to scale. The same reference numerals are used in the drawings to indicate the same parts, and in the drawings:

[0023] Figure 1 A partial longitudinal sectional view of a horizontal scroll compressor according to a first embodiment of the present invention is shown;

[0024] Figure 2 A perspective view of the fixed scroll of a horizontal scroll compressor according to a first embodiment of the present invention is shown;

[0025] Figure 3 A top view of the fixed scroll of a horizontal scroll compressor according to a first embodiment of the present invention is shown;

[0026] Figure 4 It shows along Figure 3 A cross-sectional view of a fixed vortex, intercepted by the CC section line;

[0027] Figure 5 A partial longitudinal sectional view of a horizontal scroll compressor according to a second embodiment of the present invention is shown;

[0028] Figure 6It shows Figure 5 A magnified view of the details of area A in the image; and

[0029] Figure 7 A partial longitudinal sectional view of a horizontal scroll compressor in a comparative example is shown. Detailed Implementation

[0030] Now we will combine the appendix Figures 1 to 6 Preferred embodiments of the invention will be described in detail below. In the various views, corresponding components or portions are referred to by the same reference numerals. The following description is exemplary in nature and is not intended to limit the invention or its application or use. In the following description, "horizontal center axis direction" refers to the direction in which the central axis of the horizontal scroll compressor lies, which is parallel to the horizontal plane in its natural state. "Horizontal plane containing the horizontal center axis" refers to the plane that includes the central axis of the horizontal scroll compressor and is parallel to the horizontal plane in its natural state.

[0031] Figure 1 A horizontal turbo compressor according to a first embodiment of the present invention is shown, wherein the structure of the exhaust end of the horizontal scroll compressor is particularly shown. Figure 1 As shown, the horizontal scroll compressor 100 includes a housing 110 defining the internal space of the compressor. The housing 110 may include a cylindrical portion 112 located in the middle section and a top cover 114 and a bottom cover (not shown) located at both axial ends of the cylindrical portion 112. The top cover 114 and the bottom cover are fixedly connected to the cylindrical portion 112, thereby enclosing the internal space of the compressor together with the cylindrical portion 112. An intake port (not shown) for drawing in working fluid is provided on the cylindrical portion 112, while an exhaust port for discharging compressed working fluid out of the compressor is provided on the top cover 114. A partition plate 116 extending substantially laterally (i.e., perpendicular to the horizontal central axis of the horizontal scroll compressor) is also provided between the cylindrical portion 112 and the top cover 114, thereby dividing the internal space defined by the housing 110 into a high-pressure side space and a low-pressure side space. Specifically, the space between the top cover 114 and the partition plate 116 constitutes the high-pressure side space, while the space between the partition plate 116 and the bottom cover constitutes the low-pressure side space. The low-pressure side space contains a motor, a rotating shaft, and a scroll assembly. The motor drives the scroll assembly through the rotating shaft to compress the working fluid.

[0032] The compressed working fluid is discharged from the low-pressure side space to the high-pressure side space, typically mixed with oil droplets. Before the working fluid is discharged from the compressor, the oil needs to be separated and recovered to avoid excessive oil circulation rate, affecting the performance of the system heat exchanger, or causing oil shortage in the compressor. Therefore, an oil distribution pipe 140 extending generally laterally is provided in the high-pressure side space. The oil distribution pipe 140 includes a working fluid outlet at the top of the pipe, an oil return hole 144 at the bottom of the pipe, and an air inlet 142 on the side wall of the pipe. The working fluid outlet of the oil distribution pipe 140 communicates with the exhaust port on the top cover 114, and the interior of the oil distribution pipe 140 may include structures for oil-gas separation. A mixture of high-pressure working fluid (gas) and oil (liquid) enters the oil separator 140 through the air inlet 142. The oil separator 140 separates the working fluid from the oil. The separated working fluid is discharged through the working fluid outlet of the oil separator, while the separated oil drips from the oil return hole 144 of the oil separator into the oil sump 150 located at the bottom of the high-pressure side space. The oil sump 150 is connected to the low-pressure side space through the oil return channel 152 provided in the vortex assembly. Under the action of the pressure difference between the high-pressure side space and the low-pressure side space, the oil accumulated in the oil sump 150 returns to the low-pressure side space through the oil return channel 152 to cool and lubricate the various components in the low-pressure side space.

[0033] The oil return channel 152 is preferably constructed as a microchannel, the dimensions of which are determined such that the temperature and pressure of the oil decrease after passing through the oil return channel 152, allowing it to better perform its cooling and lubrication functions upon returning to the low-pressure side space, and / or, under certain circumstances, to prevent improper leakage of working fluid from the high-pressure side space to the low-pressure side space. For example, the ratio of the inner diameter to the length of the oil return channel is less than or equal to 1:35, thereby ensuring that the pressure of the oil returning to the low-pressure side space through the oil return channel is sufficiently reduced. Additionally, preferably, the air inlet 142 is located closer to the working fluid outlet than to the oil return port 144; that is, the air inlet 142 is located in the upper middle part of the oil distribution pipe 140, thereby keeping the air inlet 142 away from the oil sump 150 and reducing the possibility of oil being carried away from the compressor by the working fluid.

[0034] The following reference Figure 4The specific structure of the vortex assembly in the low-pressure side space is described. The vortex assembly includes a moving vortex component 120 and a fixed vortex component 130. The moving vortex component 120 includes a moving vortex end plate 124 and a helical blade 122 formed on one side of the moving vortex end plate 124. The fixed vortex component 130 is formed by a main body portion 133 and a cover plate portion 136, wherein the main body portion 133 includes a fixed vortex end plate 134 and a helical blade 132 formed on one side of the fixed vortex end plate 134. The helical blade 132 of the fixed vortex component meshes with the helical blade 122 of the moving vortex component 120, thereby forming a series of compression chambers for compressing the working fluid between the fixed vortex component 130 and the moving vortex component 120. The cover plate portion 136 is located on the opposite side of the fixed vortex end plate 134 to its helical blade 132. A central exhaust chamber 137 is formed between the cover plate portion 136 and the main body portion 133. Figure 4 The central exhaust chamber 137 can communicate with the central exhaust port 135 located at the center of the fixed vortex end plate 134. An exhaust valve 139 for opening or closing the central exhaust port 135 is also provided within the central exhaust chamber 137. Figure 4 The cover plate portion 136 is provided with an exhaust port 138 for connecting the central exhaust chamber 137 and the high-pressure side space. The exhaust port 138 is located above the horizontal plane containing the horizontal central axis (at least the center of the exhaust port 138 is located above the horizontal plane containing the horizontal central axis). The cover plate portion 136 is also provided with a first oil return passage section 1521, and the main body portion 133 is provided with a second oil return passage end 1521. The first oil return passage section 1521 and the second oil return passage section 1522 are sealed together by an adaptive seal, thereby jointly forming an oil return passage 152 for guiding oil from the oil sump 150 in the high-pressure side space back to the low-pressure side space. In order to be away from the oil distribution pipe to reduce the possibility of oil being carried away from the compressor and to facilitate communication with the oil sump, the oil return passage 152 is located below the horizontal plane containing the horizontal central axis.

[0035] In the first embodiment of the present invention, although the cover plate portion 136 and the main body portion 133 are constructed as separate components to facilitate processing and assembly, those skilled in the art will understand that the cover plate portion 136 and the main body portion 133 can also be integrally formed into a fixed vortex component.

[0036] In order to provide a certain axial flexibility to the fixed scroll component (i.e., to enable the fixed scroll component to move a predetermined distance along the horizontal central axis) to increase the reliability and safety of the compressor, the fixed scroll component 130 is also provided with a back pressure chamber, so that the fixed scroll component 130 can reliably engage with the moving scroll component 120 under the pressure provided by the back pressure chamber.

[0037] See Figure 1The back pressure chamber of the fixed vortex component 130 includes a first back pressure chamber C1, a second back pressure chamber C2, and a third back pressure chamber C3. The back pressure chambers are formed on the side opposite to the vortex blades 132 of the fixed vortex component; in other words, the back pressure chambers are formed on the side of the cover plate portion 136 opposite to the central exhaust chamber 137, and are constituted by the cover plate portion 136, the partition plate 116, and the sealing element. Specifically, as... Figure 2 and Figure 3 As shown, on the side of the cover plate portion 136 opposite to the central exhaust chamber 137 (in Figure 2 (Seen as the upper side of cover plate portion 136), cover plate portion 136 has a third flange portion 1363 projecting axially around the outer periphery of cover plate portion 136, a first flange portion 1361 projecting axially around exhaust port 138, and a second flange portion 1362 projecting axially around the opening of the first oil return passage section 1521. The third flange portion 1363 is sealedly engaged with partition plate 116 by a third sealing ring 160 to form a third back pressure chamber C3, the first flange portion 1361 is sealedly engaged with partition plate 116 by the first sealing ring 161 to form a first back pressure chamber C1, and the first flange portion 1362 is sealedly engaged with partition plate 116 by the second sealing ring 162 to form a second back pressure chamber C2. The first back pressure chamber C1 and the second back pressure chamber C2 are located within the third back pressure chamber C3, making the arrangement of the back pressure chambers more compact and easier to process and install. The third back pressure chamber C3 is connected to at least one of a series of compression chambers with intermediate pressure through a channel (not shown) provided in the fixed scroll component, thereby providing intermediate pressure to the third back pressure chamber C3. The first back pressure chamber C1 is connected to the high-pressure side space through a first orifice 1161 on the partition plate 116, thereby providing high pressure to the first back pressure chamber C1. The first back pressure chamber C1 is also connected to the exhaust port 138, so that the compressed working fluid is discharged from the exhaust port 138 and then discharged to the high-pressure side space through the first back pressure chamber C1. The second back pressure chamber C2 is connected to the high-pressure side space through a second orifice 1162 on the partition plate 116, thereby providing high pressure to the second back pressure chamber C2. Here, "connection" means direct spatial connection. The high pressure generated by the gas in the first back pressure chamber C1 and the second back pressure chamber C2, as well as the intermediate pressure generated by the gas in the third back pressure chamber C3, can resist the axial gas force in the compression chamber, so that the fixed scroll component is pressed tightly against the moving scroll component, ensuring the axial seal between the fixed scroll component and the moving scroll component.

[0038] like Figure 4As shown, in the first embodiment of the present invention, since the exhaust port 138 of the fixed vortex component 130 (i.e., the exhaust port 138 on the cover plate portion 136) is located above the horizontal plane where the horizontal central axis is located, and the oil return channel 152 (including the first oil return channel section 1521) is located below the horizontal plane where the horizontal central axis is located, the first back pressure chamber C1 corresponding to the position of the exhaust port 138 and the second back pressure chamber C2 corresponding to the position of the opening of the first oil return channel end 1521 are also located above and below the horizontal plane where the horizontal central axis is located, respectively. Therefore, the first back pressure chamber C1 and the second back pressure chamber C2 can provide the fixed vortex component 130 with high pressures F1 and F2 respectively acting on the upper and lower sides of the horizontal central axis, thereby pressing the fixed vortex component 130 more stably against the moving vortex component 120.

[0039] Those skilled in the art will understand that the first back pressure chamber C1 and the second back pressure chamber C2 can be configured as follows: Figure 1 and Figure 3 The locations shown, respectively above and below the horizontal plane containing the horizontal central axis without intersecting the horizontal plane, can also be positioned at intersections with the horizontal plane containing the horizontal central axis, provided that the first back pressure chamber C1 is offset upwards relative to the horizontal plane containing the horizontal central axis, and the second back pressure chamber C2 is offset downwards relative to the horizontal plane containing the horizontal central axis. Furthermore, the first back pressure chamber C1 can be offset downwards relative to the horizontal plane containing the horizontal central axis, and the second back pressure chamber C2 can be offset upwards relative to the horizontal plane containing the horizontal central axis, provided that the first back pressure chamber C1 is at least partially located above the horizontal plane, and the exhaust port 138 communicates with the first back pressure chamber C1 through the portion of the first back pressure chamber C1 located above the horizontal plane. Additionally, although in Figure 3 The diagram shows that both the first back pressure cavity C1 and the second back pressure cavity C2 are circular, but they can also be implemented in other shapes. When the first back pressure cavity C1 and the second back pressure cavity C2 are not circular, "center" refers to the geometric center.

[0040] Since the high pressure F1 generated by the first back pressure chamber C1 and the high pressure F2 generated by the second back pressure chamber C2 do not act on the vortex center, an overturning moment may be generated on the fixed vortex component 130. To ensure the stability of the fixed vortex component 130, the centers of the first back pressure chamber C1 and the second back pressure chamber C2 are located on opposite sides of the horizontal plane containing the horizontal central axis, and the centers of the first back pressure chamber C1 and the second back pressure chamber C2 are located on opposite sides of a longitudinal plane perpendicular to the horizontal plane, or both are located on this longitudinal plane. Preferably, the first back pressure chamber C1 and the second back pressure chamber C2 are radially opposed about the horizontal central axis to substantially balance the moments generated by the first back pressure chamber C1 and the second back pressure chamber C2. Furthermore, in order to completely cancel out the torques generated by the first back pressure chamber C1 and the second back pressure chamber C2 to achieve the balance of the fixed vortex component 130, in the transverse section perpendicular to the horizontal central axis, the product of the cross-sectional area S1 of the first back pressure chamber C1 and the distance L1 from the center of the first back pressure chamber C1 to the horizontal central axis is equal to the product of the cross-sectional area S2 of the second back pressure chamber C2 and the distance L2 from the center of the second back pressure chamber C2 to the horizontal central axis, that is, S1×L1=S2×L2.

[0041] The oil-gas path in the horizontal scroll compressor 100 according to the first embodiment of the present invention is as follows: the working fluid in the low-pressure side space enters the scroll assembly, and becomes high-pressure working fluid after being compressed by a series of compression chambers. It leaves the compression chamber from the central exhaust port 135 of the fixed scroll end plate 134, opens the exhaust valve 139 and enters the central exhaust chamber 137. Subsequently, it enters the high-pressure side space through the exhaust port 138 provided above the horizontal central axis, the first back pressure chamber C1 and the first orifice 1161 on the partition plate 116. The working fluid entering the high-pressure side space enters the oil distribution pipe 240 through the air inlet 242 of the oil distribution pipe. Oil-gas separation occurs in the oil distribution pipe 240. The working fluid after oil separation is discharged outside the compressor, and the separated oil drips into the oil sump 150 at the bottom of the high-pressure side space through the oil return hole 144 at the bottom of the oil distribution pipe 140. The oil in the oil tank 150 returns to the low-pressure side space through the second orifice 1162 on the partition plate 116, which is located below the horizontal central axis, the second back pressure chamber C2, and the oil return channel 152 in the fixed vortex component.

[0042] The following is combined with, for example Figure 7The comparative example shown illustrates the advantages of the first embodiment of the present invention. In the comparative example, the horizontal scroll compressor 1 includes a housing 10, a moving scroll component 20, and a fixed scroll component 30, etc., and its structure and working principle are basically the same as those of the present invention, so they will not be described again. The difference is that the exhaust port 38 of the fixed scroll component 30 is located in the center of the cover plate portion 36, and a high-pressure back pressure chamber C0 and a medium-pressure back pressure chamber C are provided on the side of the cover plate portion 36 opposite to the main body portion 33. The high-pressure back pressure chamber C0 is located around the exhaust port 38 in the center of the cover plate portion 36 and communicates with the high-pressure side space through an opening 161 located in the center of the partition plate 16. The medium-pressure back pressure chamber C is located on the outer periphery of the first back pressure chamber C0 and communicates with at least one compression chamber with intermediate pressure in a series of compression chambers through a channel (not shown) provided in the fixed scroll component 30. In addition, the oil sump 50 at the bottom of the high-pressure side space returns to the low-pressure side space through the oil return channel 52 formed in the partition plate 16 and the housing 10. In the comparative example, since the exhaust port 38 and the corresponding high-pressure back pressure chamber C0 and the orifice 161 on the partition plate 16 are all located on the horizontal central axis (that is, the center of the exhaust port 38, the center of the high-pressure back pressure chamber C0 and the center of the orifice 161 are on the horizontal central axis), the distance between them and the oil sump 50 at the bottom of the high-pressure side space is small, making it easy for the oil to be carried away from the compressor by the working fluid.

[0043] In the horizontal scroll compressor 100 of the present invention, since the exhaust port 138 and the corresponding first back pressure chamber C1 and the first orifice 1161 on the partition plate 116 are all located above the horizontal central axis, the distance to the oil sump 150 at the bottom of the high pressure side space is increased, thus preventing the oil from being carried away from the compressor by the working fluid.

[0044] On the other hand, to prevent the fixed scroll component 130 from overturning due to the force exerted by the first back pressure chamber C1 located above the horizontal central axis, the horizontal scroll compressor 100 of the present invention also provides a second back pressure chamber C2 located below the horizontal central axis. This allows the torque exerted by the second back pressure chamber C2 on the fixed scroll component 130 to cancel out the torque exerted by the first back pressure chamber C1 on the fixed scroll component 130, ensuring that the fixed scroll component 130 engages with the moving scroll component 120 more stably and reliably. Simultaneously, the second back pressure chamber C2 connects the oil return channel 152 in the fixed scroll component and the second orifice 1162 on the partition plate 116, allowing the oil in the oil sump 150 to return to the low-pressure side space via the second orifice 1162 on the partition plate 116, the second back pressure chamber C2, and the oil return channel 152. Therefore, by simply opening a second orifice 1162 on the partition plate 116, it is possible to simultaneously provide high pressure to the second back pressure chamber C2 and provide an oil return path, without having to open multiple orifices on the partition plate, making the compressor structure simpler and easier to manufacture.

[0045] Those skilled in the art will understand that, although in the first embodiment of the present invention the second back pressure chamber C2 is disposed in the oil return path, the present invention is not limited thereto. Figures 5 to 6 A second embodiment according to the present invention is shown, wherein the second back pressure chamber C2 is set independently of the return oil path.

[0046] like Figure 5 As shown, in the second embodiment of the present invention, the horizontal scroll compressor 200 includes a housing 210, a moving scroll component 220, and a fixed scroll component 230, etc., and its structure and working principle are basically the same as those of the first embodiment of the present invention, so they will not be described again. The difference is that, in addition to the first orifice 2161 communicating with the first back pressure chamber C1 and the second orifice 2162 communicating with the second back pressure chamber C2, the partition plate 216 also has a separate through hole for connecting the oil sump 250 of the high-pressure side space and the low-pressure side space. Figure 6 It shows Figure 5 The image shows an enlarged view of region A, where the through-hole is located. This through-hole passes axially through the partition plate 216, is positioned below the horizontal central axis, and is located outside the cover plate 236 of the fixed vortex component, thus forming a return oil channel 252 that directly connects the oil sump 250 to the low-pressure side space. In contrast, no return oil channel is provided in the fixed vortex component, and the second back pressure chamber C2 is no longer connected to the return oil channel.

[0047] According to the second embodiment of the present invention, the oil-gas path in the horizontal scroll compressor 200 is as follows: the working fluid in the low-pressure side space enters the scroll assembly, and after being compressed by a series of compression chambers, becomes high-pressure working fluid. It leaves the compression chamber from the central exhaust port 235 of the fixed scroll end plate 234, opens the exhaust valve 239, and enters the central exhaust chamber 237. Subsequently, it enters the high-pressure side space through the exhaust port 238 provided above the horizontal central axis, the first back pressure chamber C1, and the first orifice 2161 on the partition plate 216. The working fluid entering the high-pressure side space enters the oil distribution pipe 240 through the air inlet 242 of the oil distribution pipe. Oil-gas separation occurs in the oil distribution pipe 240. The working fluid after oil separation is discharged outside the compressor, while the separated oil drips through the oil return hole 244 at the bottom of the oil distribution pipe 240 into the oil sump 250 at the bottom of the high-pressure side space. The oil in the oil sump 250 returns to the low-pressure side space through the oil return channel 252 provided on the partition plate 216 below the horizontal central axis.

[0048] Therefore, according to the second embodiment of the present invention, in addition to the advantage of avoiding high-pressure exhaust from carrying oil away from the compressor due to the eccentric arrangement of the exhaust port 238 above the horizontal central axis, the processing and assembly of the fixed scroll component 230 is simpler and the cost is lower because there is no need to provide an oil return channel in the fixed scroll component 230.

[0049] Furthermore, those skilled in the art will understand that the present invention is not limited to the two embodiments described above, but also includes variations or combinations thereof. For example, the first back pressure chamber C1 and the second back pressure chamber C2 may not be located within the third back pressure chamber C3; it is sufficient that the first, second, and third back pressure chambers are sealed and separated from each other. As another example, the number of second back pressure chambers C2 can be one, two, or more. Preferably, there are two second back pressure chambers C2, one of which is connected to the oil return channel located in the fixed vortex component. The line connecting the centers of the two second back pressure chambers C2 and the center of the first back pressure chamber C1 forms an isosceles triangle, ensuring sufficient force balance in the fixed vortex component and enabling more stable and reliable engagement between the fixed vortex component and the moving vortex component.

[0050] The high-temperature heat pump system according to a preferred embodiment of the present invention has been described above with reference to specific embodiments. It is understood that the above description is merely exemplary and not restrictive, and various modifications and variations can be conceived by those skilled in the art with reference to the above description without departing from the scope of the invention. These modifications and variations are also included within the scope of protection of the present invention.

Claims

1. A horizontal scroll compressor (100, 200), said horizontal scroll compressor comprising: Housing (110, 210) defining the internal space of the horizontal scroll compressor; A partition (116, 216) divides the interior space into a high-pressure side space and a low-pressure side space; as well as A scroll assembly comprising a moving scroll component (120, 220) and a stationary scroll component (130, 230), wherein a series of compression chambers are formed between the moving scroll component and the stationary scroll component, and the stationary scroll component includes an exhaust port (138, 238) for discharging compressed working fluid from the scroll assembly to the high-pressure side space. The fixed scroll component is configured to move a predetermined distance relative to the housing along the horizontal central axis of the horizontal scroll compressor. The fixed vortex component and the partition plate are provided with a first back pressure chamber (C1) and a second back pressure chamber (C2) that are sealed to each other and used to push the fixed vortex component toward the moving vortex component. The first back pressure chamber is positioned offset to one side toward the horizontal plane where the horizontal central axis is located, and the second back pressure chamber is positioned offset to the other side of the horizontal plane. The first back pressure chamber is at least partially located above the horizontal plane. Both the first back pressure chamber and the second back pressure chamber are in communication with the high-pressure side space, and the first back pressure chamber is also in communication with the exhaust port.

2. The horizontal scroll compressor (100, 200) according to claim 1, wherein: The first back pressure chamber and the second back pressure chamber are positioned radially opposite each other about the horizontal central axis.

3. The horizontal scroll compressor (100, 200) according to claim 1, wherein: In a transverse section perpendicular to the horizontal central axis, the product of the cross-sectional area of ​​the first back pressure cavity and the distance from the center of the first back pressure cavity to the horizontal central axis is equal to the product of the cross-sectional area of ​​the second back pressure cavity and the distance from the center of the second back pressure cavity to the horizontal central axis.

4. The horizontal scroll compressor (100, 200) according to claim 1, wherein, There are two second back pressure cavities. In a transverse section perpendicular to the horizontal central axis, the line connecting the center of the first back pressure cavity and the center of the two second back pressure cavities forms an isosceles triangle.

5. The horizontal scroll compressor (100) according to claim 1, wherein, An oil sump (150, 250) for containing oil is provided in the area below the horizontal plane in the high-pressure side space. A first orifice (1161) communicating with the first back pressure chamber and a second orifice (1162) communicating with the second back pressure chamber are formed in the partition plate (116, 216).

6. The horizontal scroll compressor (100) according to claim 5, wherein, The fixed vortex component is provided with an oil return channel (152) that communicates with the second back pressure chamber. The oil in the oil pool (150, 250) returns to the low-pressure side space through the second orifice (1162), the second back pressure chamber and the oil return channel.

7. The horizontal scroll compressor (200) according to claim 5, wherein, An oil return channel (252) directly communicating with the low-pressure side space is also formed in the partition plate (216), and the oil in the oil pool (150, 250) returns to the low-pressure side space through the oil return channel (252).

8. The horizontal scroll compressor (100, 200) according to claim 6 or 7, wherein, The ratio of the inner diameter to the length of the oil return channel (152, 252) is less than or equal to 1:

35.

9. The horizontal scroll compressor (100, 200) according to any one of claims 1 to 7, characterized in that, A third back pressure chamber (C3) is also provided between the fixed vortex component and the partition plate, which is sealed and separated from both the first back pressure chamber (C1) and the second back pressure chamber (C2) for pushing the fixed vortex component toward the moving vortex component. The third back pressure chamber (C3) is connected to the compression chamber with intermediate pressure in the compression chamber. The first back pressure chamber (C1) and the second back pressure chamber (C2) are located in the third back pressure chamber (C3).

10. The horizontal scroll compressor (100, 200) according to any one of claims 1 to 7, wherein, The fixed vortex component includes a separate main body (133) and a cover plate (136), and the exhaust port (138) is formed on the cover plate at a position above the horizontal plane.

11. The horizontal scroll compressor (100, 200) according to any one of claims 1 to 7, wherein, An oil distribution pipe (140, 240) is provided in the high-pressure side space. The oil distribution pipe has an air inlet (142, 242) located above the horizontal plane and an oil return hole (144, 244) located at the bottom of the oil distribution pipe.

12. The horizontal scroll compressor (100, 200) according to any one of claims 1 to 7, wherein, The first back pressure chamber and the second back pressure chamber are located above and below the horizontal plane, respectively.

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