A scroll compressor and an air conditioner

Abstract

This invention provides a scroll compressor and an air conditioner, belonging to the field of air conditioners. It includes a moving scroll and a stationary scroll disposed within a compressor housing, the moving and stationary scrolls meshing to form a compression chamber; it also includes an upper support disposed within the compressor housing to support the moving scroll, the upper support and the moving scroll forming a back pressure chamber, the back pressure chamber being configured to provide back pressure to resist the overturning force experienced by the moving scroll during rotation; the moving scroll has a first channel and a second channel, the first or second channel being selectively connected to the back pressure chamber according to the compressor's operating frequency to adjust the back pressure of the back pressure chamber. The back pressure chamber in this invention can change with the compressor's operating frequency, which can improve the high-frequency overturning phenomenon of the compressor pump body.

Description

Technical Field

[0001] This invention belongs to the field of air conditioners, and particularly relates to a scroll compressor and an air conditioner. Background Technology

[0002] Scroll compressors are widely used in air conditioning and heat pump systems due to their high efficiency, small size, and stable operation. Generally, a scroll compressor consists of a closed casing, a moving scroll, a stationary scroll, a frame, a crankshaft, anti-rotation slip rings, a motor, and an oil supply system.

[0003] During operation, the moving and stationary discs of a scroll compressor may tilt due to eccentricity between the crankshaft and the moving scroll. Since there is a gap between the pump body and the upper support, this tilting increases the pump body clearance, leading to leakage and consequently affecting the compressor's cooling capacity and performance.

[0004] Meanwhile, due to the pump body's tendency to tilt, the moving scroll plate becomes unstable during operation, leading to increased noise levels. Therefore, an axial force needs to be applied to the back of the moving scroll plate to ensure it is in close contact with the stationary scroll plate, reducing pump body leakage and the instability of the moving scroll plate.

[0005] As the frequency increases during operation, the overturning moment of the scroll compressor increases. The existing pump body back pressure is supplied through the intermediate pressure hole connected to the compression chamber. The axial back pressure provided by this structure cannot change with the frequency. Therefore, as the operating frequency of the compressor increases, the overturning phenomenon will further increase, and the leakage will also increase.

[0006] In view of this, the present invention is proposed. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a scroll compressor and an air conditioner.

[0008] To solve the above-mentioned technical problems, on the one hand, the present invention provides a scroll compressor, including a moving scroll and a stationary scroll disposed in the compressor housing, wherein the moving scroll and the stationary scroll mesh with each other to form a compression chamber;

[0009] It also includes an upper support set inside the compressor housing for supporting the moving scroll, the upper support and the moving scroll forming a back pressure chamber, the back pressure chamber being configured to provide back pressure to resist the overturning force experienced by the moving scroll when it rotates;

[0010] The moving scroll plate has a first channel and a second channel. The first channel or the second channel can be selectively connected to the back pressure chamber according to the operating frequency of the compressor to guide different gas pressures at different positions in the compression chamber to the back pressure chamber to provide different back pressures to the moving scroll plate.

[0011] In the above technical solution, the first channel is provided with a first back pressure hole a near the center of the moving scroll plate and a first back pressure hole b far away from the center of the moving scroll plate. The first back pressure hole a is connected to the compression chamber, and the first back pressure hole b is intermittently connected to the back pressure chamber during one rotation of the moving scroll plate.

[0012] The second channel has a second back pressure hole a located near the center of the moving scroll plate and a second back pressure hole b located away from the center of the moving scroll plate. The second back pressure hole a is connected to the compression chamber, and the second back pressure hole b is intermittently connected to the back pressure chamber during one rotation of the moving scroll plate.

[0013] The second back pressure hole a is positioned closer to the center of the moving scroll plate than the first back pressure hole a.

[0014] In the above technical solution, the moving scroll plate is provided with an on / off component, which is configured to change the on / off state of the first channel and the on / off state of the second channel according to the operating frequency of the compressor so that the back pressure chamber is connected to the first channel or to the second channel.

[0015] In the above technical solution, the switching component includes a first switching part and a second switching part that are linked together;

[0016] The first switching section is configured to change the on / off state of the first channel according to the operating frequency of the compressor, and the second switching section is configured to change the on / off state of the second channel according to the operating frequency of the compressor.

[0017] When the compressor operates at different frequencies, the first channel and the second channel always maintain one of the channels in a connected state under the action of the first switching part and the second switching part.

[0018] In the above technical solution, when the compressor is running at low frequency, the first and second switching parts that are linked together are configured to connect the first channel and close the second channel;

[0019] When the compressor is running at high frequency, the linked first and second switching parts are configured to close the first channel and open the second channel.

[0020] In the above technical solution, the first switching part and the second switching part are rotatably mounted on the moving scroll plate;

[0021] When the compressor is running, the first on / off section and the second on / off section can rotate relative to the moving scroll according to the compressor's operating frequency to change the on / off state of the first channel and the second channel.

[0022] In the above technical solution, the first switching part and the second switching part rotate relative to the moving scroll plate under the action of centrifugal force, and when the compressor is running, the centrifugal force on the first switching part is greater than the centrifugal force on the second switching part.

[0023] The on / off assembly also includes a spring disposed in the second channel, which is connected to the first on / off part so that when the compressor is running at low frequency, the first channel is in the closed state and the second channel is in the open state.

[0024] In the above technical solution, the first switching part includes a first channel pin that is slidably disposed along the first channel and a first guide rod that is rotatably disposed with the first channel pin;

[0025] The second disconnection part includes a second channel pin that is slidably disposed along the second channel and a second guide bar that is rotatably disposed with the second channel pin;

[0026] The first and second guide rods are telescopic rods;

[0027] The switching assembly also includes a turntable rotatably mounted on a moving scroll plate, with a first guide rod and a second guide rod connected to the turntable to enable the first switching part and the second switching part to move in tandem.

[0028] In the above technical solution, the density of the first channel pin is less than the density of the second channel pin.

[0029] In the above technical solution, the length of the first guide rod is less than the length of the second guide rod.

[0030] In the above technical solution, the moving scroll disk includes a tightly coupled upper part and a lower part of the moving scroll disk. The upper part of the moving scroll disk is configured to be connected to the crankshaft, and the lower part of the moving scroll disk is configured to be connected to the stationary scroll disk.

[0031] The first channel, the second channel, and the on / off assembly are located at the bottom of the moving scroll plate.

[0032] On the other hand, this embodiment of the invention also provides an air conditioner, which includes the scroll compressor mentioned above.

[0033] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0034] I. In this invention, by setting two back pressure channels, and the two back pressure channels can be selectively connected to the back pressure chamber according to the operating frequency of the compressor, the pump body can open different back pressure channels at different frequencies, thereby making the back pressure of the pump body change with the frequency of the compressor, and improving the high-frequency overturning phenomenon of the pump body.

[0035] Second, the back pressure chamber in this invention can increase the back pressure as the operating frequency of the compressor increases, making the dynamic and static scroll plates fit better, thereby reducing its high-frequency leakage and increasing the compressor's cooling capacity and performance.

[0036] Third, the back pressure chamber in this invention can increase the back pressure as the operating frequency of the compressor increases, making the moving scroll plate run more stably, thereby reducing its total high-frequency noise value and increasing the reliability of the pump body.

[0037] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0038] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0039] Figure 1 This is a cross-sectional view of an embodiment of the scroll compressor of the present invention;

[0040] Figure 2 for Figure 1 A three-dimensional structural schematic diagram of the moving scroll disk in the embodiment;

[0041] Figure 3 for Figure 2 A schematic diagram of the exploded structure of the moving vortex disk in the embodiment;

[0042] Figure 4 for Figure 3 The embodiment shows a top view of the lower part of the moving scroll disk, illustrating the structure of the moving scroll disk during low-frequency operation.

[0043] Figure 5 for Figure 3 The embodiment shows a top view of the lower part of the moving scroll disk, illustrating a structural schematic of the moving scroll disk during high-frequency operation.

[0044] Figure 6 for Figure 3 The embodiment shows a top view of the lower part of the moving scroll disk, and the figure also shows another structural schematic diagram of the moving scroll disk when it is running at high frequency.

[0045] Figure 1-6In the middle: 1-compressor housing, 2-moving scroll, 2a-upper part of moving scroll, 2b-lower part of moving scroll, 21-first channel, 211-first back pressure hole a, 212-first back pressure hole b, 22-second channel, 221-second back pressure hole a, 222-second back pressure hole b, 23-on / off assembly, 231-first on / off part, 2311-first channel pin, 2312-first guide rod, 232-second on / off part, 2321-second channel pin, 2322-second guide rod, 3-stationary scroll, 4-compression chamber, 5-upper bracket, 6-back pressure chamber, 7-crankshaft.

[0046] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0047] In the description of this invention, it should be noted that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limiting this invention.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "contact," and "communication" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] Currently, existing scroll compressors experience an increase in overturning moment as the operating frequency rises. Existing pump back pressure is supplied through a medium-pressure port connected to the compression chamber. This structure cannot change the axial back pressure with frequency, leading to further overturning and increased leakage as the compressor's operating frequency increases. This invention addresses this by providing two back pressure channels that can be selectively connected to the back pressure chamber based on the compressor's operating frequency. This allows the pump to open different back pressure channels at different frequencies, thus varying the pump back pressure with the compressor frequency and improving the high-frequency overturning phenomenon.

[0050] To further illustrate the technical solution of this invention, the following is combined with... Figures 1-6 As shown, the following specific embodiments are provided.

[0051] Example 1

[0052] Before introducing the embodiments of the present invention, a brief explanation of the working principle of a scroll compressor in the prior art is provided: A scroll compressor uses the rotation of its crankshaft to drive the rotation of a moving scroll, which meshes with a stationary scroll to compress gas. Because the center of gravity of the moving scroll is not in the center, it may overturn during operation. Overturning leads to instability in the operation of the moving scroll and causes leakage, affecting the compressor's noise, reliability, and performance. To solve the problems caused by the overturning of the moving scroll, existing scroll compressors use a method of setting a medium-pressure hole on the moving scroll to introduce the pressure in the pump body's compression chamber to the back of the moving scroll, thus providing back pressure to alleviate the overturning phenomenon. However, since the overturning force of the moving scroll increases with the compressor's operating frequency, the existing structure cannot adjust the pump body back pressure according to changes in the compressor frequency.

[0053] To address the above problems, this invention provides a method such as... Figure 1 The scroll compressor shown includes a moving scroll 2 and a stationary scroll 3 disposed within a compressor housing 1. The moving scroll 2 and the stationary scroll 3 mesh with each other to form a compression chamber 4. It also includes an upper support 5 disposed within the compressor housing 1 to support the moving scroll 2. The upper support 5 and the moving scroll 2 form a back pressure chamber 6. The back pressure chamber 6 is configured to provide back pressure to resist the overturning force experienced by the moving scroll 2 when it rotates. The moving scroll 2 has a first channel 21 and a second channel 22. The first channel 21 or the second channel 22 can be selectively connected to the back pressure chamber 6 according to the operating frequency of the compressor to guide different gas pressures at different positions in the compression chamber 4 to the back pressure chamber 6 to provide different back pressures to the moving scroll 2.

[0054] In this invention, two back pressure channels are set up, and the two back pressure channels can be selectively connected to the back pressure chamber 6 according to the operating frequency of the compressor. This allows the pump body to open different back pressure channels at different frequencies, thereby introducing different pressures at different angles of the compression chamber 4 into the back pressure chamber 6, ultimately providing different magnitudes of back pressure. Consequently, the pump body back pressure changes with the compressor frequency, improving the high-frequency overturning phenomenon of the pump body.

[0055] like Figure 3 As shown, the first channel 21 is provided with a first back pressure hole a211 close to the center of the moving scroll plate 2 and a first back pressure hole b212 far away from the center of the moving scroll plate 2. The first back pressure hole a211 is connected to the compression chamber 4, and the first back pressure hole b212 is intermittently connected to the back pressure chamber 6 during the period when the moving scroll plate 2 rotates once.

[0056] The second channel 22 has a second back pressure hole a221 located near the center of the moving scroll plate 2 and a second back pressure hole b222 located away from the center of the moving scroll plate 2. The second back pressure hole a is connected to the compression chamber 4 of 221, and the second back pressure hole b222 is intermittently connected to the back pressure chamber 6 during one rotation of the moving scroll plate 2.

[0057] The pressure in the compression chamber 4 drawn from the first channel 21 is greater than the pressure in the compression chamber 4 drawn from the second channel 22.

[0058] Specifically, the second back pressure port a221 is positioned closer to the center of the moving scroll plate 2 than the first back pressure port a211. Because the second back pressure port a221 is closer to the center of the moving scroll plate 2 than the first back pressure port a211, the gas pressure discharged from the second back pressure port a221 is greater than the gas pressure discharged from the first back pressure port a211. Therefore, when the compressor operates at high frequency, to resist the large overturning force generated by the moving scroll plate 2 during high-frequency operation, the compressed gas in the compression chamber 4 can be discharged through the second back pressure port a211 to resist the large overturning force on the moving scroll plate 2. However, when the compressor operates at low frequency, the overturning force generated by the moving scroll plate 2 is smaller; therefore, simply discharging the compressed gas in the compression chamber 4 through the first back pressure port a211 is sufficient to resist the overturning force on the moving scroll plate 2.

[0059] The reason why the two back pressure channels on the moving scroll plate 2 are set up in the above manner (that is, the second back pressure hole a221 is set close to the center of the moving scroll plate 2 relative to the first back pressure hole a211) in the embodiment of the present invention is to ensure that the compressor opens different back pressure holes (the first back pressure hole a211 and the second back pressure hole a221) at different frequencies, so as to ensure that the compressor operates smoothly without affecting the working efficiency of the compressor.

[0060] like Figure 3 As shown, when the compressor is running at low frequency, the first channel 21 is in the connected state and the second channel 22 is in the closed state. At this time, the compressed gas in the compression chamber 4 can be guided to the back pressure chamber 6 through the first back pressure hole a211, the first channel 21 and the first back pressure hole b212 in sequence. (The high-pressure compressed gas located at the center of the compression chamber 4 will not be discharged, so it will not affect the working efficiency of the compressor) to resist the overturning force suffered by the moving scroll plate 2 when running at low frequency, thereby reducing the degree of overturning of the moving scroll plate 2.

[0061] like Figure 4As shown, when the compressor is running at high frequency, the first channel 21 is closed and the second channel 22 is open. At this time, the compressed gas in the compression chamber 4 can be guided to the back pressure chamber 6 through the second back pressure hole a221, the second channel 22 and the second back pressure hole b222 in sequence, so as to provide a greater back pressure to the back pressure chamber 6 to resist the large overturning force suffered by the moving scroll plate 2 during high frequency operation, thereby reducing the degree of overturning of the moving scroll plate 2, making the compressor run more smoothly at high frequency, reducing the leakage of the compressor during high frequency operation, increasing the cooling capacity and performance of the compressor, thereby ensuring the performance, noise and reliability of the compressor.

[0062] The following is a detailed explanation of how to adjust the back pressure in back pressure chamber 6:

[0063] like Figures 2-5 As shown, a switching component 23 is provided on the moving scroll plate 2. The switching component 23 is configured to change the switching state of the first channel 21 and the switching state of the second channel 22 according to the operating frequency of the compressor so that the back pressure chamber 6 is connected to the first channel 21 or to the second channel 22.

[0064] Specifically, the switching component 23 includes a first switching part 231 and a second switching part 232 that are linked together. The first switching part 231 is configured to change the on / off state of the first channel 21 according to the operating frequency of the compressor, and the second switching part 232 is configured to change the on / off state of the second channel 22 according to the operating frequency of the compressor. When the compressor runs at different frequencies, the first channel 21 and the second channel 22 can always maintain one of the channels in a connected state under the action of the first switching part 231 and the second switching part 232, so that the compressor can be guaranteed to run smoothly whether it is running at low frequency or high frequency.

[0065] More specifically, when the compressor operates at low frequency, the linked first switching part 231 and second switching part 232 are configured to connect the first channel 21 and close the second channel 22. That is, the first switching part 231 opens the first channel 21, and the second switching part 232 closes the second channel 22. The compressed gas (low pressure) discharged from the first channel 21 is discharged into the back pressure chamber 6 to resist the overturning force (relatively small) of the moving scroll plate 2.

[0066] When the compressor operates at high frequency, the interconnected first switching part 231 and second switching part 232 are configured to close the first channel 21 and open the second channel 22. That is, the first switching part 231 closes the first channel, and the second switching part 232 opens the second channel 22. The compressed gas (with higher pressure) discharged from the second back pressure channel 22 is discharged into the back pressure chamber 6 to resist the overturning force (relatively large) of the moving scroll plate 2.

[0067] Further, such as Figure 4 and Figure 5 As shown, the first on / off section 231 and the second on / off section 232 are mounted on the moving scroll plate 2 by means of rotation. When the compressor is running, the first on / off section 231 and the second on / off section 232 can rotate relative to the moving scroll plate 2 according to the operating frequency of the compressor to change the on / off state of the first channel 21 and the on / off state of the second channel 22.

[0068] When the compressor is running, the first on / off part 231 and the second on / off part 232 rotate relative to the moving scroll plate 2 under the action of centrifugal force. When the compressor is running, the centrifugal force on the first on / off part 231 is greater than the centrifugal force on the second on / off part 232. The on / off assembly 23 also includes a spring 233 disposed in the second channel. The spring 233 is connected to the first on / off part 231 so that when the compressor is running at low frequency, the spring 233 drives the first on / off part 231 to reset so that the first channel 21 is in the closed state and the second channel 22 is in the open state.

[0069] Further, if Figure 3-Figure 5 As shown, the first switching part 231 includes a first channel pin 2311 that is slidably disposed along the first channel 21 and a first guide rod 2312 that is rotatably disposed with the first channel pin 2311. Specifically, the first guide rod 2312 is hinged to the first channel pin 2311.

[0070] The second disconnecting part 232 includes a second channel pin 2321 that is slidably disposed along the second channel 22 and a second guide rod 2322 that is rotatably disposed with the second channel pin 2321. Specifically, the second guide rod 2322 is hinged to the second channel pin 2321.

[0071] Among them, the channel pin (first channel pin 2311 and second channel pin 2321) is a cylindrical pin with a through hole in the middle, and the first guide rod 2312 and the second guide rod 2322 are telescopic rods.

[0072] In addition, the on / off assembly 23 also includes a turntable 234 rotatably mounted on the moving scroll plate 2, and the first guide rod 2312 and the second guide rod 2322 are fixedly connected to the turntable 234 so that the first on / off part 231 and the second on / off part 232 are linked together.

[0073] When the compressor is running, the first on / off part 231 and the second on / off part 232 on the moving scroll 2 are subjected to centrifugal force and rotate relative to the moving scroll 2 with the turntable 234 as the rotation center. Since the centrifugal force on the first on / off part 231 is greater than the centrifugal force on the second on / off part 232, when the moving scroll 2 is rotating, the first channel pin 2311 located in the first channel 21 will have a tendency to move towards the edge of the moving scroll 2.

[0074] Specifically, when the compressor operates at low frequency, the spring force of the spring 233 located in the first channel 21 is greater than the centrifugal force on the first on / off part 231. Therefore, the spring 233 is in an uncompressed state at this time, and the first on / off part 231 and the second on / off part 232 will not rotate relative to the moving scroll plate 2. Figure 4 As shown, at this time, the first channel pin 2311 in the first disconnection part 231 does not block the first back pressure hole b, and the second channel pin 2321 in the second disconnection part 232 blocks the second back pressure hole b222. Therefore, the first channel 21 is in the connected state and the second channel 22 is in the closed state.

[0075] When the compressor is running at high frequency, the elastic force of the spring 233 is less than the centrifugal force on the first switching part 231. The spring 233 is compressed, and the first channel pin 2311 in the first switching part 231 moves along the opening path of the first channel 21 toward the edge of the moving scroll 2. The first guide rod 2312 in the first switching part 231 rotates. At the same time, the second guide rod 2322 in the second switching part 232, which is linked to the first switching part 231, also rotates accordingly. When the second guide rod 2322 rotates, the second channel pin 2321, which is hinged to the second guide rod 2322, moves along the opening path of the second back pressure path 22 toward the center of the moving scroll 2. At this time, the first channel pin 2311 in the first switching part 231 blocks the first back pressure hole b212, while the second channel pin 2321 in the second switching part 232 does not block the second back pressure hole b222. Therefore, the first channel 21 is closed and the second channel 22 is connected. Since the second back pressure hole b222 is located closer to the center of the moving scroll plate 2, the second back pressure hole b222 is located in the area of ​​greater pressure in the compression chamber 4. When the second channel 22 is connected, it can provide greater back pressure to the back pressure chamber 6 on the back of the moving scroll plate 2 to resist the greater overturning phenomenon of the moving scroll plate 2 as the frequency increases.

[0076] As described above, the centrifugal force experienced by the first switching part 231 during compressor operation is greater than that experienced by the second switching part 232 during compressor operation. Specifically, the reason why the centrifugal force of the first switching part 231 is greater than that of the second switching part 232 is that the density of the first channel pin 2311 in the first switching part 231 is less than the density of the second channel pin 2321 in the second switching part 232, thereby making the centrifugal force of the first switching part 231 greater than that of the second switching part 232.

[0077] It should be noted that in some alternative implementation methods, such as Figure 6As shown, the length of the first guide rod 2312 in the first switching part 231 can also be set to be less than the length of the second guide rod 2322 in the second switching part 232. Similarly, the centrifugal force on the first switching part 231 during the operation of the compressor can be greater than the centrifugal force on the second switching part 232.

[0078] It should also be noted that the aforementioned moving scroll disk 2 is composed of two parts, including a tightly connected upper part 2a and a lower part 2b. The upper part 2a is configured to be connected to the crankshaft 7, and the lower part 2b is configured to be connected to the stationary scroll disk 3. The first channel 21, the second channel 22, and the on / off assembly 23 are located in the lower part 2b of the moving scroll disk.

[0079] On the other hand, this embodiment of the invention also provides an air conditioner, which includes the scroll compressor mentioned above.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A scroll compressor, characterized in that, It includes a moving scroll plate (2) and a stationary scroll plate (3) disposed in the compressor housing (1), wherein the moving scroll plate (2) and the stationary scroll plate (3) mesh with each other to form a compression chamber (4); It also includes an upper bracket (5) disposed in the compressor housing (1) for supporting the moving scroll (2), the upper bracket (5) and the moving scroll (2) forming a back pressure chamber (6), the back pressure chamber (6) being configured to provide back pressure to resist the overturning force experienced by the moving scroll (2) when it rotates; The moving scroll plate (2) is provided with a first channel (21) and a second channel (22). The first channel (21) or the second channel (22) can be selectively connected to the back pressure chamber (6) according to the operating frequency of the compressor to guide different gas pressures at different positions in the compression chamber (4) to the back pressure chamber (6) to provide different back pressures to the moving scroll plate (2). The moving scroll plate (2) is provided with a switching component (23). The switching component (23) includes a first switching part (231) and a second switching part (232) that are linked together. When the compressor runs at different frequencies, the first channel (21) and the second channel (22) always maintain one of the channels in a connected state under the action of the first switching part (231) and the second switching part (232). The first on / off part (231) and the second on / off part (232) are rotatably disposed on the moving scroll plate (2). The first on / off part (231) and the second on / off part (232) rotate relative to the moving scroll plate (2) under the action of centrifugal force. When the compressor is running, the centrifugal force on the first on / off part (231) is greater than the centrifugal force on the second on / off part (232). The on / off assembly (23) further includes a spring (233) disposed in the second channel, the spring (233) being connected to the first on / off part (231).

2. The scroll compressor according to claim 1, characterized in that, The first channel (21) has a first back pressure hole a (211) close to the center of the moving scroll plate (2) and a first back pressure hole b (212) far from the center of the moving scroll plate (2). The first back pressure hole a (211) is connected to the compression chamber (4), and the first back pressure hole b (212) is intermittently connected to the back pressure chamber (6) during the period when the moving scroll plate (2) rotates once. The second channel (22) has a second back pressure hole a (221) close to the center of the moving scroll plate (2) and a second back pressure hole b (222) far from the center of the moving scroll plate (2). The second back pressure hole a (221) is connected to the compression chamber (4), and the second back pressure hole b (222) is intermittently connected to the back pressure chamber (6) during the period when the moving scroll plate (2) rotates once. The second back pressure hole a (221) is positioned closer to the center of the moving scroll disk (2) than the first back pressure hole a (211).

3. The scroll compressor according to claim 1, characterized in that, The first switching part (231) is configured to change the on / off state of the first channel (21) according to the operating frequency of the compressor, and the second switching part (232) is configured to change the on / off state of the second channel (22) according to the operating frequency of the compressor.

4. The scroll compressor according to claim 3, characterized in that, When the compressor is running at low frequency, the first switching part (231) and the second switching part (232) that are linked together are configured to connect the first channel (21) and close the second channel (22); When the compressor is running at high frequency, the first switching part (231) and the second switching part (232) that are linked together are configured to close the first channel (21) and open the second channel (22).

5. The scroll compressor according to claim 4, characterized in that, When the compressor is running, the first on / off part (231) and the second on / off part (232) can rotate relative to the moving scroll (2) according to the operating frequency of the compressor to change the on / off state of the first channel (21) and the on / off state of the second channel (22).

6. The scroll compressor according to claim 5, characterized in that, The first switching part (231) includes a first channel pin (2311) that is slidably disposed along the first channel (21) and a first guide rod (2312) that is rotatably disposed with the first channel pin (2311). The second on / off part (232) includes a second channel pin (2321) that is slidably disposed along the second channel (22) and a second guide rod (2322) that is rotatably disposed with the second channel pin (2321); The first guide rod (2312) and the second guide rod (2322) are telescopic rods; The on / off assembly (23) further includes a turntable (234) rotatably disposed on the moving scroll plate (2), wherein the first guide rod (2312) and the second guide rod (2322) are connected to the turntable (234) so ​​that the first on / off part (231) and the second on / off part (232) are linked together.

7. The scroll compressor according to claim 6, characterized in that, The density of the first channel pin (2311) is less than the density of the second channel pin (2321).

8. The scroll compressor according to claim 6, characterized in that, The length of the first guide rod (2312) is less than the length of the second guide rod (2322).

9. The scroll compressor according to claim 1, characterized in that, The moving scroll disk (2) includes a tightly coupled upper part (2a) and a lower part (2b) of the moving scroll disk. The upper part (2a) of the moving scroll disk is configured to be connected to the crankshaft (7), and the lower part (2b) of the moving scroll disk is configured to be connected to the stationary scroll disk (3). The first channel (21), the second channel (22), and the on / off assembly (23) are disposed at the lower part (2b) of the moving scroll disk.

10. An air conditioner, characterized in that, Includes the scroll compressor as described in any one of claims 1-9.

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