A horizontal rotary compressor

Abstract

The present invention discloses a horizontal rotary compressor, comprising a working chamber and an oil storage chamber, wherein a motor assembly, a compression assembly and a central shaft are arranged in the working chamber, an oil guide channel is arranged in the middle of the central shaft and the oil guide channel extends to the oil storage chamber, a radial outer through hole connected to the oil guide channel is also arranged on the central shaft, the bottom of the working chamber and the oil storage chamber are connected through a pressure stabilizing channel, and the compressor further comprises a drainage channel whose upper end is connected to the oil guide channel for guiding the oil in the oil storage chamber into the oil guide channel, and a gas introduction channel is arranged at the upper end of the drainage channel for drawing gas from the oil storage chamber when the drainage channel sucks the oil. Through the above arrangement, not only can the lubricating oil level in the working chamber be effectively prevented from being too high, thereby affecting the rotation of the rotor, but the liquid level in the oil storage chamber can also be effectively ensured to be high, so that the lubricating oil can be continuously supplied to the oil guide channel to ensure the lubrication of the friction pair.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and more particularly to a horizontal rotary compressor. Background Art

[0002] See also Figure 1 , Figure 1 The cross-sectional structure of a common horizontal rotary compressor in the prior art is schematically shown. The horizontal rotary compressor primarily comprises an outer shell 101, a compression assembly 102 disposed within the outer shell 101, and a motor assembly. Specifically, the compressor comprises a main housing 101, a compression assembly 102, a main bearing 103, a motor 104, a stator 105, a rotor 106, an oil reservoir 107, a motor cavity 108 (including a first motor cavity 108a and a second motor cavity 108b), a stator notch 110, an oil passage 111, a crankshaft 112, a gas passage 113, an exhaust pipe 114, an intake pipe 115, a first housing 116, a second housing 117, and lubricating oil 104.

[0003] An appropriate amount of lubricating oil 104 is sealed within the cylindrical main housing 101 to lubricate and cool the bearings, motor, and other components within. The outer periphery of the main bearing 103 in the compression assembly 102 is fixed to the inner periphery of the main housing 101, while the outer periphery of the stator 105 of the motor assembly is also fixed to the inner periphery of the main housing 101. The outer periphery of the stator 105 is typically provided with multiple stator cutouts 110, which are located within the motor cavity 108 and serve as channels for exhaust or oil. The rotor 106 of the motor assembly is fixed to the outer periphery of the crankshaft 112. The compression assembly 102 primarily consists of a cylinder, piston, vanes, a main bearing 103, and a secondary bearing. The main bearing 103 divides the housing's interior into two chambers: an oil reservoir 107 and a motor cavity 108. The bottom of the main bearing 103 is provided with an oil channel 111 that opens into the oil reservoir 107 and motor cavity 108, respectively.

[0004] After the horizontal rotary compressor begins operation, the main bearing 103 lowers the oil level in the motor chamber 108 through the oil passage 111, while raising the oil level in the oil reservoir 107. Thus, by controlling the oil levels in the motor chamber 108 and the oil reservoir 107, the high-speed rotation of the rotor 106 in the motor chamber 108 can be prevented from causing agitation of the oil 104, while also allowing the lubricating oil 104 to be stored in the oil reservoir 107. The lubricating oil 104 in the oil reservoir 107 is primarily supplied to the crankshaft 112, two bearings, and the compression assembly. When there is excess lubricating oil 104 in the oil reservoir 107, it can be supplied according to varying operating conditions to maintain operational reliability. The main bearing 103 plays a crucial role in controlling the oil level in the horizontal rotary compressor. Its most significant feature is the gas passage 113 provided on its upper portion. An exhaust pipe 114 is located on the upper portion of the oil reservoir 107. High-pressure gas is drawn into the compression assembly 102 through the intake pipe 115 located below, compressed, and discharged into the motor chamber 108. It then passes through the stator notch 110, the gap between the stator 105 and the rotor 106, and the gas passage 113 to the upper portion of the oil reservoir 107. Finally, the high-pressure gas is discharged to the system side through the exhaust pipe 114.

[0005] When the gas in the motor chamber 108 moves toward the oil reservoir 107 through the gas passage 113 located in the upper portion of the main housing 101, the passage 113 acts as a gas resistance, causing only a slight pressure drop. Specifically, the pressure in the oil reservoir 107 is slightly lower than the pressure in the motor chamber 108. This pressure difference is called Δp. The magnitude of Δp is determined by factors such as the cross-sectional area of ​​the gas passage 113, the gas flow rate, and the gas density. Due to the Δp, the lubricating oil 104 retained in the motor chamber 108 is transferred to the oil reservoir 107 through the oil passage 111 located at the bottom of the main housing 101. As a result, the oil level in the motor chamber 108 decreases while the oil level in the oil reservoir 107 increases. The magnitude of Δp is significantly affected by the predetermined cross-sectional area and length of the gas passage 113. For a selected system, such as an air conditioner, the amount of gas discharged from the main housing 101 of a horizontal rotary compressor to the exhaust pipe 114 can vary by at least tenfold depending on operating conditions.

[0006] Furthermore, a large amount of refrigerant dissolves in the lubricating oil 104 sealed in the main housing 101. When a horizontal rotary compressor with this structure is shut down for an extended period, the amount of oil diluted by the dissolved refrigerant reaches more than twice the amount of oil sealed, and the main housing 101 is often filled with this diluted oil. For this reason, it is important to note that the fluid passing through the gas passage 113 provided in the main bearing 103 is not just gas, but also a mixture of gas and oil. Under large fluctuations, while the area of ​​the gas passage 113 remains constant, Δp can vary significantly, making it difficult to stably store the oil 104 in the oil reservoir 107. If Δp becomes abnormally large, the oil level in the oil reservoir 107 will become too high, and the oil 104 will flow out of the exhaust pipe 114 connected to the oil reservoir 107 toward the system. Conversely, if Δp is too small, the oil 104 level in the oil reservoir 107 will decrease, ultimately failing to store oil 104, and the oil level in the motor chamber 108 will rise. That is, in the former case, the oil 104 will be discharged to the system side in large quantities, and in the latter case, the horizontal rotary compressor will be short of oil. Not only can it not be lubricated, but the oil 104 will be stirred in the motor cavity 108 due to the rotation of the rotor 106, which will reduce the efficiency of the horizontal rotary compressor and increase the amount of oil discharged from the exhaust pipe 114.

[0007] In summary, how to effectively solve the problem of low oil level in the oil storage chamber of a horizontal rotary compressor is an urgent problem that those skilled in the art need to solve. Summary of the Invention

[0008] In view of this, an object of the present invention is to provide a horizontal rotary compressor, which can effectively solve the problem of low oil level in the oil storage cavity in the shell of the horizontal rotary compressor.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A horizontal rotary compressor includes a working chamber and an oil storage chamber. A motor assembly, a compression assembly, and a central shaft are provided in the working chamber. A drainage channel is provided in the oil storage chamber, wherein:

[0011] The central shaft is provided with an oil guide channel, and the oil guide channel extends to the oil storage chamber. The central shaft is also provided with a radial outer through hole connected to the oil guide channel. The working chamber and the bottom of the oil storage chamber are connected through a pressure-stabilizing channel. The upper end of the drainage channel is connected to the oil guide channel for introducing the oil in the oil storage chamber into the oil guide channel. A gas introduction channel is provided at the upper end of the drainage channel, and the gas introduction channel is used to draw gas from the oil storage chamber when the drainage channel sucks the oil.

[0012] According to the above technical solution, it can be seen that when the above-mentioned horizontal rotary compressor is used, during operation, the rotor in the electric drive motor assembly rotates. This rotation of the rotor drives the central shaft member to rotate the shaft of the compression assembly and the piston, which increases the air pressure in the working chamber. At this time, if the air pressure in the oil storage chamber is too low, the pressure differential will cause lubricating oil to enter the oil storage chamber through the pressure stabilizing channel until the left and right sides are balanced. Because the central shaft member rotates, the lubricating oil inside the central shaft member is centrifugally forced into the radially outer through-hole and then flows to the friction pair. If the liquid level of the oil storage chamber is low at this time, then while the lubricating oil is sucked in through the drainage channel, the gas in the oil storage chamber will also be sucked in through the gas introduction channel, causing the air pressure in the oil storage chamber to drop. Based on the function of the pressure stabilizing channel, the lubricating oil in the working chamber will enter the oil storage chamber through the pressure stabilizing channel, compressing the gas in the upper part of the oil storage chamber. At this time, the oil level rises until the oil level is above the inlet of the gas introduction channel, so as to effectively ensure that the oil level in the oil storage chamber is not too low, or at least can be stabilized above the axis of the central shaft. Through the above arrangement, it is not only effective to avoid the lubricating oil level in the working chamber being too high, which affects the rotation of the rotor, but also to effectively ensure that the liquid level in the oil storage chamber is high, so that the lubricating oil can be continuously supplied to the oil guide channel to ensure the lubrication of the friction pair. In summary, the horizontal rotary compressor can effectively solve the problem of the horizontal rotary compressor that the oil level in the oil storage chamber is too low.

[0013] The gas introduction channel includes at least one of the following:

[0014] an opening, provided on a side of one end of the drainage channel connected to the oil guide channel, wherein the upper end of the drainage channel is in sealed communication with the oil guide channel;

[0015] A gap is formed between an interface for connecting the upper channel opening of the drainage channel and the upper channel opening of the drainage channel.

[0016] Preferably, the gap is a radial gap formed between the inner wall of the interface and the drainage channel and / or an axial gap formed between the end surface of the interface and the end surface of the drainage channel.

[0017] Preferably, it includes a drainage tube, the internal tubular cavity of the drainage tube is the drainage channel, the drainage tube includes a vertically arranged vertical tube section and a horizontal tube section whose one end is connected to the upper end of the vertical tube section and extends horizontally, the other end of the horizontal tube section is used to be connected to the central axis and the horizontal tube section is coaxially arranged with the central axis.

[0018] Preferably, the cross-sectional area of ​​the gas inlet channel is not larger than the area of ​​the upper channel opening of the drainage channel.

[0019] Preferably, the pressure stabilizing channel is provided with a flow blocking device, and at least when the oil level in the oil storage chamber is lower than a predetermined height, the flow blocking device prevents the oil in the oil storage chamber from flowing into the working chamber through the pressure stabilizing channel.

[0020] Preferably, the flow blocking device comprises one of the following:

[0021] an extension tube, wherein the lower end of the extension tube is connected to the pressure-stabilizing channel, and the upper end of the extension tube is not lower than the axis of the central shaft, so as to prevent the oil in the oil storage chamber from flowing into the working chamber through the pressure-stabilizing channel when the oil level in the oil storage chamber is lower than the axis of the central shaft;

[0022] A one-way valve is provided at the pressure-stabilizing channel to prevent the oil stored in the oil storage chamber from flowing into the working chamber through the pressure-stabilizing channel.

[0023] Preferably, the one-way valve is provided in the pressure-stabilizing channel, the lower end of the drainage channel is connected to the pressure-stabilizing channel, and an opening is provided on the side of the lower end of the drainage channel, and the area of ​​the opening is not larger than the port area of ​​the pressure-stabilizing channel located at one end of the working chamber.

[0024] Preferably, it also includes a partition for dividing the shell cavity into the working chamber and the oil storage chamber. The partition is a sheet metal part, and a central hole is provided in the middle. The hole has a flange extending into the oil storage chamber to form a tube portion connected to the drainage channel, and the tube portion is connected to the oil guide channel.

[0025] Preferably, it includes a shell having the shell cavity, the shell including a tubular tube shell and a first shell and a second shell arranged at both ends of the tube shell, the second shell having a barrel inserted into the tube shell, the edge of the partition having a connecting flange, the connecting flange being in contact with the inner wall of the barrel or the inner wall of the tube shell.

[0026] Preferably, the connecting flange of the partition is a cylindrical flange, and the cylindrical flange is in close contact with the inner wall of the cylinder and has an interference fit, or the cylindrical flange is in close contact with the inner wall of the tube shell and has an interference fit.

[0027] Preferably, the cylindrical flange is in contact with the inner wall of the end portion of the tube shell, and abuts against the end surface of the cylindrical portion in the axial direction of the central axis.

[0028] Preferably, it further comprises an exhaust muffler which is covered on the air outlet of the compression assembly, and a changing surface is provided at the air outlet end of the air outlet of the exhaust muffler.

[0029] Preferably, the compression assembly is arranged between the motor assembly and the oil storage chamber, the shell cavity is provided with an exhaust pipe on the side of the motor assembly away from the compression assembly, and the motor assembly is provided with an air guide channel for introducing the high-pressure gas on the side of the motor assembly close to the compression assembly to the other side of the motor assembly.

[0030] Preferably, the compression assembly divides the working chamber into a motor chamber and a buffer chamber, the air outlet of the compression assembly is located on one side of the compression assembly close to the oil storage chamber, and the upper edge of the compression assembly is provided with a gas channel for connecting the motor chamber and the buffer chamber, the cross-sectional area of ​​the gas channel is larger than the cross-sectional area of ​​the air outlet of the exhaust muffler, and the bottom of the motor chamber is connected to the bottom of the buffer chamber through an oil guide path.

[0031] Preferably, the air outlet of the exhaust muffler is arranged directly opposite to the partition.

[0032] Preferably, the air outlet of the compression assembly is located on the side away from the oil storage chamber on both sides of the compression assembly, the compression assembly is arranged between the motor assembly and the oil storage chamber, and the compression assembly divides the working chamber into a motor chamber and a buffer chamber, and the upper edge of the compression assembly is provided with a gas channel for connecting the motor chamber and the buffer chamber, the bottom of the motor chamber is connected to the bottom of the buffer chamber through an oil guide channel, and the pressure stabilizing channel is used to connect the buffer chamber with the oil storage chamber.

[0033] In order to achieve the above-mentioned purpose, the present invention provides a horizontal rotary compressor, which includes a shell and a motor assembly, a compression assembly and a central shaft arranged in the shell cavity of the shell, the central shaft is in transmission connection with the motor assembly and the compression assembly, and the central shaft is provided with an oil guide channel extending to the oil storage chamber and a radial outer through hole connected to the oil guide channel, the shell cavity is separated into a working chamber and an oil storage chamber, wherein the motor assembly is located in the working chamber, and the working chamber is connected to the bottom of the oil storage chamber through a pressure-stabilizing channel; a drainage channel is provided in the oil storage chamber, one end of the drainage channel is connected to the oil guide channel and an opening and / or gap is provided at the connection, and the other end is open and extends to the lower cavity of the oil storage chamber. This horizontal rotary compressor has corresponding technical features to the horizontal rotary compressor provided above. Since the above-mentioned horizontal rotary compressor has the above-mentioned technical effects, this horizontal rotary compressor also has corresponding technical effects.

[0034] Preferably, the opening is a through hole provided on the side of the drainage channel, and the gap is an annular gap formed by the drainage channel and the oil guide channel.

[0035] Preferably, the pressure stabilizing channel is provided with a flow blocking device, and at least when the oil level in the oil storage chamber is lower than a predetermined height, the flow blocking device prevents the oil in the oil storage chamber from flowing into the working chamber through the pressure stabilizing channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 It is a cross-sectional structural diagram of a common horizontal rotary compressor in the prior art;

[0038] Figure 2 A schematic structural diagram of a horizontal rotary compressor provided by an embodiment of the present invention;

[0039] Figure 3 A schematic structural diagram of a horizontal rotary compressor provided by an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of the internal structure of an oil storage chamber provided in one embodiment of the present invention;

[0041] Figure 5 A schematic diagram of the internal structure of an oil storage chamber provided in one embodiment of the present invention;

[0042] Figure 6 A schematic diagram of the internal structure of an oil storage chamber provided in one embodiment of the present invention;

[0043] Figure 7 A schematic diagram of the internal structure of an oil storage chamber provided in one embodiment of the present invention.

[0044] The following are marked in the accompanying drawings:

[0045] Main housing 101, compression assembly 102, main bearing 103, lubricating oil 104, stator 105, rotor 106, oil storage chamber 107, motor chamber 108 (first motor chamber 108a, second motor chamber 108b), stator cutout 110, oil passage 111, crankshaft 112, gas passage 113, exhaust pipe 114, intake pipe 115, first housing 116, second housing 117;

[0046] Tube shell 1, compression assembly 2, main bearing 3, motor assembly 4, stator 5, rotor 6, oil storage chamber 7, motor chamber 8, buffer chamber 9, air guide channel 10, oil guide oil circuit 11, central shaft 12, gas channel 13, exhaust pipe 14, intake pipe 15, first shell 16, second shell 17, auxiliary bearing 18, oil body 19, exhaust muffler 20, partition 21, opening 22, drainage channel 23, pressure stabilizing channel 24, one-way valve 25, extension tube 26, opening 27, gap 28, oil guide channel 29, radial outer through hole 30. DETAILED DESCRIPTION

[0047] The embodiment of the present invention discloses a horizontal rotary compressor, which effectively solves the problem that the oil level in the oil storage cavity in the shell of the horizontal rotary compressor is easily too low.

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0049] See also Figure 2-Figure 7 , Figure 2 A schematic structural diagram of a horizontal rotary compressor provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of a horizontal rotary compressor provided by an embodiment of the present invention; Figure 4 A schematic diagram of the internal structure of an oil storage chamber provided in one embodiment of the present invention; Figure 5 A schematic diagram of the internal structure of an oil storage chamber provided in one embodiment of the present invention; Figure 6 A schematic diagram of the internal structure of an oil storage chamber provided in one embodiment of the present invention; Figure 7 A schematic diagram of the internal structure of an oil storage chamber provided in one embodiment of the present invention.

[0050] In a specific embodiment, this embodiment provides a horizontal rotary compressor, which specifically includes a working chamber and an oil storage chamber 7 .

[0051] The working chamber is provided with a motor assembly 4, a compression assembly 2 and a central shaft 12, wherein the compression assembly 2 generally mainly includes a cylinder, a main bearing 3 and a secondary bearing 18, wherein the main bearing 3 and the secondary bearing 18 are mounted on the surfaces of both sides of the cylinder to support the central shaft 12, and the compression assembly 2 also includes a circular piston located in the center of the cylinder and housed in the cylinder compression chamber, and a sliding vane in relative sliding contact with the outer periphery of the piston, and the various components are generally connected by screws. The motor assembly 4 includes a stator 5 and a rotor 6. It should be noted that the structures of the motor assembly 4 and the compression assembly 2 can refer to the existing technology, and are not specifically limited here and will not be repeated.

[0052] The central shaft 12 is used to transmit power between the motor assembly 4 and the compression assembly 2. Specifically, one end of the central shaft 12 is linked to the rotor 6 of the motor assembly 4, and the other end is linked to the piston of the compression assembly 2. The rotor 6 of the motor assembly 4 drives the piston of the compression assembly 2 to rotate, and the rotation of the piston of the compression assembly 2 enables gas pressurization. The central shaft 12 is preferably arranged to extend horizontally so that the entire rotary compressor is a horizontal rotary compressor.

[0053] The central shaft 12 is provided with an oil guide channel 29 (see Figure 3 ), which can be a blind hole or a through hole, one end of which serves as an inlet for introducing lubricating oil. Specifically, an axial hole can be provided in the middle of the central shaft 12 to serve as the oil guide channel 29. The central shaft 12 is also provided with a radially outer through hole 30 that communicates with the oil guide channel 29 to direct the lubricating oil within the oil guide channel 29 to the friction pair to be lubricated. That is, during rotation, due to centrifugal force, the lubricating oil within the oil guide channel 29 flows out through the radially outer through hole 30, primarily to the friction pairs such as the main bearing 3 and the secondary bearing 18. The radially outer through hole 30 can be a channel hole with one end extending to the oil guide channel 29 and the other end extending to the outside of the central shaft 12, thereby directing the lubricating oil within the oil guide channel 29 to the friction pairs outside the central shaft 12. Considering the number of friction pairs, multiple radially outer through holes 30 are generally provided along the extension direction of the central shaft 12.

[0054] The oil guide channel 29 extends axially, and its inlet end extends to the oil storage chamber 7, thereby communicating with the oil storage chamber 7 to allow lubricating oil to be introduced from the oil storage chamber 7. Generally, to better introduce the lubricating oil, suction vanes are provided at the oil guide channel 29 to draw the lubricating oil in. Alternatively, the center shaft 12 may simply rotate, generating a centrifugal suction force to ensure that the lubricating oil enters the oil guide channel 29.

[0055] The oil storage chamber 7 is used to store lubricating oil. The oil storage chamber 7 is generally a closed chamber. Generally, the wall of the oil storage chamber 7 is sealed at least above the central axis 12, that is, no vent hole that can freely communicate with the outside gas is provided. The oil storage chamber 7 and the working chamber are arranged in parallel, both located in the outer shell of the horizontal rotary compressor. Specifically, a partition 21 can be provided to separate the internal cavity into the oil storage chamber 7 and the working chamber. It should be noted that the oil storage chamber 7 is a cavity for storing oil. The oil body 19 here, that is, the lubricating oil referred to throughout the text, is also called engine oil.

[0056] The bottom of the working chamber and the bottom of the oil storage chamber 7 are connected by a pressure-stabilizing channel 24. In actual use, the oil level of the oil storage chamber 7 and the oil level of the working chamber are generally submerged in the pressure-stabilizing channel 24. This ensures that the hydraulic oil in the working chamber can enter the oil storage chamber 7 in a timely manner through the pressure-stabilizing channel 24, thereby stabilizing the gas pressure in the oil storage chamber 7 and the upper part of the working chamber. Specifically, the pressure-stabilizing channel 24 can be a through hole, with both ends connected to the oil storage chamber 7 and the working chamber respectively.

[0057] This horizontal rotary compressor is also provided with a drainage channel 23, wherein the upper end of the drainage channel 23 is connected to the oil guide channel 29 of the central shaft 12, for guiding the lubricating oil in the oil storage chamber 7 into the oil guide channel 29. Specifically, the lower end of the drainage channel 23 can be extended to the bottom of the oil storage chamber 7 so that the oil body 19 can be directly introduced from the bottom of the drainage channel 23, thereby more effectively ensuring the oil supply to the oil guide channel 29.

[0058] A gas inlet channel is provided at the upper end of the drainage channel 23 for drawing in gas from the oil storage chamber 7 when the drainage channel 23 draws in oil 19, thereby supplying oil while drawing in oil and simultaneously entraining a portion of the gas to flow out. It should be noted that when the oil level in the oil storage chamber 7 is lower than the gas inlet channel, the outer end of the gas inlet channel is connected to the gas portion of the oil storage chamber 7. When the fluid begins to be drawn in through the drainage channel 23 within the oil guide channel 29, i.e., when the oil is introduced, a low pressure is generated within the drainage channel 23, allowing the gas within the oil storage chamber 7 to enter the oil guide channel 29 through the gas inlet channel. At this time, the outflow of gas reduces the internal pressure of the oil storage chamber 7, especially when the gas portion of the oil storage chamber 7 is sealed.

[0059] It should be noted that the gas introduction channel is designed so as not to affect the suction of the oil body 19 into the oil guide channel 29. To ensure that the gas introduction channel does not affect the overall suction of the drainage channel 23, the size of the gas introduction channel is as small as possible, preferably a narrow gap 28. However, it should not be too small, as this will cause the introduced gas to be unsmooth and fail to suction the gas inside the oil storage chamber 7. Generally speaking, the cross-sectional area of ​​the gas introduction channel is generally no larger than the cross-sectional area of ​​the upper end of the drainage channel 23. In one specific embodiment, the cross-sectional area of ​​the gas introduction channel is preferably no larger than 20% of the cross-sectional area of ​​the upper end of the drainage channel 23. In another specific embodiment, the cross-sectional area of ​​the gas introduction channel is preferably no larger than 30% of the cross-sectional area of ​​the upper end of the drainage channel 23. At the same time, the cross-sectional area of ​​the gas inlet flow channel is smaller than the oil inlet area at the lower end of the drainage channel 23 connected to the oil storage chamber 7, where the oil inlet area refers to the cross-sectional area of ​​the oil body 19 flow channel, and the cross-sectional area of ​​the gas inlet flow channel is the cross-sectional area of ​​the gas flow beam perpendicular to the inflow direction when the gas flows in.

[0060] During the use of the aforementioned horizontal rotary compressor, the rotor 6 in the electrically driven motor assembly 4 rotates. This rotation drives the central shaft 12 to rotate the axis of the compression assembly 2 and the pistons, increasing the pressure within the working chamber. If the pressure within the oil reservoir 7 is too low, the pressure differential forces lubricating oil to flow through the pressure stabilizing passage 24 into the oil reservoir 7 until equilibrium is achieved. Furthermore, due to the rotation of the central shaft 12, the lubricating oil within the central shaft 12 is centrifugally forced into the radially outer through-holes and then toward the friction pair. If the liquid level of the oil storage chamber 7 is low at this time, then while the lubricating oil is sucked in through the drainage channel 23, the gas in the oil storage chamber 7 will also be sucked in through the gas introduction channel, causing the air pressure in the oil storage chamber 7 to drop. Based on the function of the pressure stabilizing channel, the lubricating oil in the working chamber will enter the oil storage chamber 7 through the pressure stabilizing channel to compress the gas in the upper part of the oil storage chamber 7, so that the oil level rises until the oil level is above the inlet of the gas introduction channel, so as to effectively ensure that the oil level in the oil storage chamber 7 is not too low, and at least can be stabilized above the axis of the central shaft 12. Through the above-mentioned arrangement, it is not only effectively avoided that the lubricating oil level in the working chamber is too high, which affects the rotation of the rotor, but also it can effectively ensure that the liquid level in the oil storage chamber 7 is high, so that the lubricating oil can be continuously supplied to the oil guide channel to ensure the lubrication of the friction pair. In summary, the horizontal rotary compressor can effectively solve the problem of the oil level in the oil storage chamber 7 being too low in the horizontal rotary compressor.

[0061] The gas introduction channel as described above is based on the principle that it does not interfere with the flow of the oil body 19 in the drainage channel 23 and can introduce gas from the outer side of the upper end of the guide tube.

[0062] The specific arrangement of the gas introduction channel is the opening 27 and / or the gap 28. The specific arrangement of the opening 27 and the gap 28 is as follows.

[0063] Specifically, an opening 27 is provided on the side of the upper end of the drainage channel 23, wherein the upper end of the drainage channel 23 can be sealedly connected to the oil guide channel 29. The gas inlet channel can also include multiple openings 27. Preferably, the total cross-sectional area of ​​all openings 27 is less than 30% of the cross-sectional area of ​​the upper end of the drainage channel. The openings 27 are preferably circular through-holes, but can also be square or triangular.

[0064] Alternatively, a gap 28 may be provided between the interface connecting the upper end of the drainage channel 23 and the upper end of the drainage channel 23. In this case, the gap 28 may serve as the aforementioned gas inlet passage. The interface may be a port of the oil guide channel 29 within the central shaft 12, or an intermediate member having one end connected to the oil guide channel 29 and the other end provided with the interface for connecting to the drainage channel 23, thereby connecting the oil guide channel 29 to the drainage channel 23.

[0065] There are several ways to form the gap 28 between the interface and the upper end of the drainage channel 23. One way is to insert the upper end of the drainage channel 23 into the interface, forming the gap 28 radially therebetween. Another way is to space the end face of the interface axially a predetermined distance from the end face of the upper end of the drainage channel 23 to form the gap 28. Alternatively, there may be both an axial gap and a radial gap between the upper end of the drainage channel 23 and the interface.

[0066] The drainage channel 23 may be provided by providing a channel in a physical component or by providing a drainage tube, wherein the lumen of the drainage tube serves as the drainage channel 23. The drainage tube includes a vertical tube section and a horizontal tube section extending horizontally, one end of which is connected to the upper end of the vertical tube section. The other end of the horizontal tube section is connected to the central axis 12, and the horizontal tube section is coaxially arranged with the central axis 12.

[0067] After the drainage tube is installed, an opening 27 can be provided on the side of the horizontal pipe section of the drainage tube to serve as the gas introduction channel. The horizontal pipe section can also be inserted into the above-mentioned interface, and the outer diameter of the horizontal pipe section is smaller than the inner diameter of the above-mentioned interface, so that a gap can be formed between the outer wall of the horizontal pipe section and the inner wall of the above-mentioned interface, that is, the gap is the above-mentioned gap 28; as shown in the attached figure, Figure 5 The gap in the horizontal pipe section can also make the inner diameter of the lumen of the horizontal pipe section the same as the inner diameter of the interface, and the end face of the horizontal pipe section and the end face of the interface axially spaced a certain distance to form a gap therebetween, and the gap can be the above-mentioned gap 28; Figure 6 , axial clearance and radial clearance can also exist at the same time.

[0068] Further consideration is that when the liquid level in the oil storage chamber 7 is very low, at this time, the liquid level in the oil storage chamber 7 is increased by only lowering the air pressure in the oil storage chamber 7 through the gas inlet channel. This operation rate is relatively low, which makes it easy to take a long time, resulting in a high oil level in the working chamber and the friction pair not being effectively lubricated for a long time.

[0069] Based on this, on the basis of the above embodiments, it is preferred that a flow blocking device be provided in the pressure stabilizing channel 24 to prevent the oil in the oil storage chamber 7 from flowing into the working chamber through the pressure stabilizing channel 24 at least when the oil level in the oil storage chamber 7 is below a predetermined height. The predetermined height is not less than one-third of the height of the oil storage chamber 7, and preferably, the predetermined height is one-half of the height of the oil storage chamber 7.

[0070] In order to better store oil, the predetermined height can be the height of the axis of the central shaft 12, that is, the flow blocking device can at least prevent the oil in the oil storage chamber 7 from flowing back into the working chamber from the pressure stabilizing channel 24 when the oil level in the oil storage chamber 7 is lower than the height of the axis of the central shaft 12.

[0071] It should be noted that the device is capable of preventing backflow at least when the oil level in the oil storage chamber 7 is lower than a predetermined height, and should include at least the following three methods: one is to prevent backflow no matter how high the oil level is; the second is that when the oil level is higher than a predetermined height, the backflow may or may not be prevented according to specific needs; the third is to start preventing backflow at a predetermined height, but not to prevent backflow when it is higher than the predetermined height. In various feasible methods allowed, the blocking device is capable of preventing backflow at least when the oil level in the oil storage chamber 7 is lower than a predetermined height. The above definition is intended to limit the liquid level to no lower than a predetermined height when the blocking device starts to prevent backflow.

[0072] When the liquid level in the oil reservoir 7 is low and the internal pressure of the oil reservoir 7 is high, when the pressure-stabilizing channel 24 is opened, the oil 19 in the oil reservoir 7 will flow back into the working chamber through the pressure-stabilizing channel 24. Combined with the oil suction by the oil guide channel 29, this will cause the oil level in the oil reservoir 7 to drop rapidly while simultaneously causing the oil level in the working chamber to rise rapidly, which can easily cause the rotor 6 in the motor assembly 4 to stir the oil. With the flow-blocking device installed, the flow-blocking effect of the flow-blocking device can prevent the oil 19 in the oil reservoir 7 from entering the working chamber through the pressure-stabilizing channel 24 when the oil level is below a predetermined height, thereby slowing the drop in the oil level in the oil reservoir 7.

[0073] In addition, based on the above description, when the predetermined height is the height of the axis of the central shaft 12, the oil level in the oil storage chamber 7 is at least stabilized above the axis of the central shaft 12 after a period of operation. This makes it easier for the oil level in the oil storage chamber 7 to remain above the axis of the central axis after shutdown due to the effect of the flow blocking device, so that when the machine is restarted, oil can be immediately supplied to the oil guide channel 29. This greatly reduces the possibility of wear and tear at the moment of startup, improves the reliability of the compressor, and significantly increases the life of the horizontal rotary compressor.

[0074] Regarding the arrangement of the aforementioned flow-blocking device, a relatively simple approach is to use a one-way valve 25 disposed in the pressure-stabilizing channel 24. The one-way valve 25 prevents the oil 19 in the oil storage chamber 7 from flowing back into the working chamber through the pressure-stabilizing channel 24 through its flow-blocking capacity. The one-way valve 25 can be disposed at the end of the pressure-stabilizing channel 24 located in the working chamber, or at the end of the pressure-stabilizing channel 24 located in the oil storage chamber 7. A relatively simple one-way valve can be a gravity one-way valve. Specifically, a vertical section can be disposed on one side of the pressure-stabilizing channel located in the oil storage chamber, a ball valve disposed within the vertical section, and a support portion disposed within the vertical section to form an annular support for the ball valve. The annular support forms a sealing fit to provide flow blocking. Under the action of a pressure differential, the oil can support the ball valve, rendering the annular support ineffective. An oil channel is then formed between the ball valve and the inner wall of the vertical section.

[0075] After installing the one-way valve 25, the lower end of the diversion channel 23 can be connected to the pressure-stabilizing channel 24. Specifically, the one-way valve 25 can be located between the diversion channel 23 and the pressure-stabilizing channel 23, and an opening 22 can be provided on the side of the lower end of the diversion channel 23 to directly guide oil from the oil reservoir 7 into the diversion channel 23. By connecting the lower end of the diversion channel 23 with the pressure-stabilizing channel 24, the oil 19 in the working chamber can be preferentially directed into the oil guide channel 29 within the central axis. To ensure better diversion, the area of ​​the opening 22 is no larger than the area of ​​the port at one end of the working chamber on the pressure-stabilizing channel 24.

[0076] As in the above-mentioned embodiment, the drainage pipe may be an integrally formed U-shaped connecting pipe, the U-shaped connecting pipe is laid down so that the opening 22 faces the working chamber, so that the upper horizontal pipe section is the above-mentioned horizontal pipe section, and the middle vertical pipe section is mainly the above-mentioned vertical pipe section, and the two ends of the lower horizontal pipe section extend to the working chamber and the oil storage chamber 7 respectively, the internal pipe cavity is the pressure-stabilizing channel 24, and a one-way valve 25 is provided inside the lower horizontal pipe section or at the lower section of the vertical pipe section, wherein the above-mentioned opening 22 is provided at the lower end of the vertical pipe section.

[0077] Based on this, the flow blocking device is preferably an extension tube 26, the lower end of which is connected to the pressure-stabilizing channel 24, and the upper end of which is located at the predetermined height. Preferably, the upper end of the extension tube 26 is not lower than the axis of the central shaft, and can be at the same height as the axis of the central shaft 12. This prevents the oil in the oil storage chamber 7 from entering the extension tube 26 when the oil level in the oil storage chamber 7 is lower than the predetermined height, thereby preventing the oil 19 from flowing into the working chamber through the pressure-stabilizing channel 24. Specifically, an L-shaped pipe can be provided, wherein both ends of the horizontal pipe portion extend to the working chamber and the oil storage chamber 7, the pipe cavity is the pressure-stabilizing channel 24, and the vertical pipe portion is the extension tube 26.

[0078] Among them, the horizontal rotary compressor is generally provided with an outer shell, and a shell cavity is formed inside the outer shell. On the basis of the above-mentioned embodiments, it is preferred here to further include a partition 21, which is used to separate the shell cavity into a working chamber and an oil storage chamber 7. The partition 21 is preferably made of sheet metal, that is, it can be stamped by sheet metal. A central hole is provided in the middle of the partition 21, and the hole edge of the central hole has a flange extending into the oil storage chamber 7 to form a pipe portion connected to the drainage channel 23, wherein one end of the pipe portion is the above-mentioned interface, and the other end is connected to the oil guide channel 29. Generally, a mounting hole is also provided in the lower part to install a pipe fitting whose tube cavity is the pressure stabilizing channel 24. The partition 21 can be specifically sealed and installed on the secondary bearing 18 of the compression assembly 2 or specifically sealed and installed on the exhaust muffler 20 on the side of the secondary bearing 18. For example, the partition 21 can also be installed on the end face of the secondary bearing 18 by pressing the exhaust muffler 20 with screws to make the overall structure more compact.

[0079] There are various ways to configure the housing, including providing a cylindrical body with a cover at the mouth of the body to form a sealed shell. A relatively simple housing is preferred, comprising a tubular shell 1 and a first shell 16 and a second shell 17 disposed at both ends of the shell 1. Both the first shell 16 and the second shell 17 are in the form of covers. The first shell 16 has a cylindrical connection portion that is inserted into the shell 1 and is sealed to the shell 1, typically by welding. The second shell 17 has a cylindrical portion that is inserted into the shell 1 and is sealed to the shell 1, typically by welding.

[0080] Regarding the installation method of the partition 21, a more specific installation method is that the edge of the partition 21 preferably has a connecting flange to fit with the inner wall of the cylindrical portion of the second housing 17 or the inner wall of the tubular shell 1, so that the oil storage chamber 7 forms a sealed chamber. Specifically, the connecting flange of the partition 21 can be a cylindrical flange, which fits with the inner wall of the cylindrical portion and has an interference fit, or fits with the inner wall of the tubular shell 1 and has an interference fit.

[0081] It should be noted that when the above-mentioned cylindrical flange is fitted with the inner wall of the end of the tube shell 1, the end of the cylindrical portion is preferably in contact with the partition 21 in the axial direction of the central axis 12, so as to limit the partition 21 in the axial direction of the central axis 12 to ensure the stability of the overall structure.

[0082] For a horizontal rotary compressor, the compression assembly 2 in the horizontal rotary compressor generally mainly includes a bearing embedded in the shell cavity and a piston supported by the bearing and eccentrically arranged in the center of the cylinder. The rotation of the piston can compress the gas. An intake pipe 15 is generally required on the shell to guide the gas to the compression assembly 2. In order to avoid noise, an exhaust muffler 20 is generally provided at the air outlet of the compression assembly 2. The structure of the exhaust muffler 20 can refer to the existing technology. Its structure is not the improvement of this application and will not be repeated here. Exhaust mufflers 20 can be installed on both sides of the compression assembly 2.

[0083] The exhaust gas from the exhaust muffler 20 is generally rich in oil droplets. In order to better reduce the oil particle content in the gas flowing out of the compressor, it is preferred that a redirecting surface be provided at the outlet end of the exhaust muffler 20. When the gas blows vertically toward the redirecting surface, the redirecting surface guides the gas, and the oil particles in the gas will adhere to the redirecting surface due to adhesion, gravity, etc. It should be noted that the redirecting surface can be set as needed, and is generally the side surface of a component of the horizontal rotary compressor to make the overall structure more compact.

[0084] A horizontal rotary compressor should also include an exhaust pipe 14, which is connected to the working chamber. The compression assembly 2 pressurizes the gas entering the intake pipe and discharges it into the working chamber, and then discharges it through the exhaust pipe 14 connected to the working chamber. The exhaust pipe 14 can be directly installed on the side of the motor assembly 4 that is close to the compression assembly 2.

[0085] However, considering the problem of motor cooling, it is preferred that the compression assembly 2 is arranged between the motor assembly 4 and the oil storage chamber 7. The shell cavity is provided with an exhaust pipe 14 on the side of the motor assembly 4 away from the compression assembly 2, and an air guide channel 10 is provided on the motor assembly 4 to guide the high-pressure gas on the side of the motor assembly 4 close to the compression assembly 2 to the other side of the motor assembly 4, and then discharged from the exhaust pipe 14 on this side. Through the above arrangement, the gas pressurized from the compression assembly 2 will pass through the air guide channel 10 on the motor assembly 4 and enter the exhaust pipe 14, which is not only conducive to the cooling of the motor assembly 4, but also can reduce the oil particle content in the gas by extending the gas circulation length. The air guide channel 10 can be a certain gap reserved between the motor assembly 4 and the outer shell to form a channel, that is, the outer diameter of the motor assembly 4 is smaller than the inner diameter of the shell 1 of the outer shell. A cutout, that is, an axially extending groove, can also be provided on the outside of the stator 5 of the motor assembly 4 to form a long strip channel with the inner wall of the shell 1.

[0086] In a specific embodiment, the compression assembly 2 is preferably arranged between the motor assembly 4 and the oil storage chamber 7, and the compression assembly 2 divides the working chamber into a motor chamber 8 and a buffer chamber 9, wherein the air outlet of the compression assembly 2 is located on the side close to the oil storage chamber 7 on both sides of the compression assembly 2, and the upper edge of the compression assembly 2 is provided with a gas channel 13 for connecting the motor chamber 8 and the buffer chamber 9, wherein the cross-sectional area of ​​the gas channel 13 is larger than the cross-sectional area of ​​the air outlet of the exhaust muffler 20, and the cross-sectional area of ​​the upper exhaust port of the exhaust muffler 20 is smaller than the cross-sectional area of ​​the gas channel 13. This means that after the gas is pressurized by the compression component 2, it is discharged into the buffer chamber 9 and then enters the motor chamber 8 through the gas channel 13. In the process of passing through the gas channel 13, because the channel becomes narrower, the average speed drops significantly, which will cause sedimentation. The oil particles with heavier specific gravity sink into the liquid oil body 19, and the high-pressure mixed gas stays in the buffer chamber 9 for a longer time due to its low speed, which significantly increases the probability of the lubricating oil particles contacting the wall of the buffer chamber 9. After the lubricating oil particles contact the wall, adhesion occurs, and the oil and gas separate again. Therefore, the lubricating oil content in the high-pressure mixed gas after passing through the gas channel 13 is significantly reduced, which effectively solves the problem of high exhaust oil content in horizontal rotary compressors. It should be noted that the bottom of the motor chamber 8 should be connected to the bottom of the buffer chamber 9, that is, connected through the oil guide path 11 to transfer the oil body 19.

[0087] In addition, the exhaust muffler 20 is disposed on the side of the compression assembly 2 near the oil storage chamber 7. The air outlet of the compression assembly 2 can be positioned directly opposite the partition 21, so that the side of the partition 21 serves as the aforementioned deflection surface, thereby deflecting the gas and trapping oil particles rich in the gas. Based on the arrangement of the exhaust pipe 14, the high-pressure gas from the compression assembly 2 will pass through the gas passage 13, further trapping oil particles in the gas.

[0088] Of course, it is also possible to set the air outlet of the compression assembly 2 on the side away from the oil storage chamber 7 on both sides of the compression assembly, that is, on the side close to the motor assembly 4. In this case, the above-mentioned air guide channel 10 can still be retained, that is, the compression assembly 2 is set between the motor assembly 4 and the oil storage chamber 7, and the compression assembly 2 divides the working chamber into the motor chamber 8 and the buffer chamber 9, and a gas channel 13 for connecting the motor chamber 8 and the buffer chamber 9 is provided on the upper side of the compression assembly 2, and the pressure stabilizing channel 24 is used to connect the buffer chamber 9 with the oil storage chamber 7. It should be noted that the bottom of the motor chamber 8 and the bottom of the buffer chamber 9 should be connected, that is, connected through the oil guide channel 11 to transfer the oil body 19. At this time, after the compressor is started and operated, the pressure in the buffer chamber 9 should be slightly lower than the pressure in the motor chamber 8. Driven by the pressure difference, the oil level in the lower part of the buffer chamber 9 should be higher than the oil level in the motor chamber 8, thereby further reducing the risk of oil stirring by the motor rotor 6 and improving the reliability and performance of the compressor.

[0089] The present invention also provides a horizontal rotary compressor, which includes an outer shell and a motor assembly, a compression assembly and a central shaft arranged in the shell cavity of the outer shell, the central shaft being in transmission connection with the motor assembly and the compression assembly, and the central shaft being provided with an oil guide channel extending to an oil storage chamber and a radial outer through hole connected to the oil guide channel, the shell cavity being separated into a working chamber and an oil storage chamber, wherein the motor assembly is located in the working chamber, and the working chamber is connected to the bottom of the oil storage chamber through a pressure stabilizing channel; a drainage channel is provided in the oil storage chamber, one end of the drainage channel is connected to the oil guide channel and an opening and / or gap is provided at the connection, and the other end is open and extends to the lower cavity of the oil storage chamber. This horizontal rotary compressor has corresponding technical features to the horizontal rotary compressor provided above, and since the above-mentioned horizontal rotary compressor has the above-mentioned technical effects, this horizontal rotary compressor also has corresponding technical effects.

[0090] Furthermore, it is preferred that the opening is located in a through hole provided on the side of the drainage channel, and the gap is an annular gap formed by the drainage channel and the oil guide channel.

[0091] Furthermore, the pressure stabilizing channel is preferably provided with a flow blocking device, which prevents the oil in the oil storage chamber from flowing into the working chamber through the pressure stabilizing channel at least when the oil level in the oil storage chamber is lower than a predetermined height.

[0092] Furthermore, the flow blocking device preferably includes one of the following:

[0093] an extension tube, wherein the lower end of the extension tube is connected to the pressure stabilizing channel and the upper end of the extension tube is not lower than the axis of the central shaft, so as to prevent the oil in the oil storage chamber from flowing into the working chamber through the pressure stabilizing channel when the oil level in the oil storage chamber is lower than the axis of the central shaft;

[0094] The one-way valve is arranged at the pressure stabilizing channel to prevent the oil stored in the oil storage chamber from flowing into the working chamber through the pressure stabilizing channel.

[0095] Furthermore, the one-way valve is preferably a gravity ball, and the port of the pressure-stabilizing channel located in the buffer chamber is a valve port set upward. Under the action of gravity, the lower part of the gravity ball is sealed and fitted with the edge of the valve port. A drainage tube is also included, and the internal lumen of the drainage tube is a drainage channel. The lower end of the drainage tube is sleeved on the valve port end of the pressure-stabilizing channel so that the inner wall can guide the gravity ball to fall on the valve port; an opening is provided on the side of the lower end of the drainage tube, and the opening is located on the upper side of the gravity ball.

[0096] Furthermore, it is preferred that a partition is provided in the shell cavity for dividing the shell cavity into a working chamber and a buffer chamber, the compression assembly is located between the motor assembly and the partition, the middle part of the partition is abutted against the end face of the central axis, and a central hole is provided in the center that is connected to the oil guide channel at one end, and the other end of the central control has a tubular flange to be mounted on the upper end of the drainage tube.

[0097] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0098] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A horizontal rotary compressor, characterized in that: It includes a working chamber and an oil storage chamber. The working chamber is provided with a motor assembly, a compression assembly and a central shaft. The oil storage chamber is provided with a drainage channel, wherein: The central shaft is provided with an oil guide channel, and the oil guide channel extends to the oil storage chamber. The central shaft is further provided with a radial outer through hole connected to the oil guide channel. The working chamber and the bottom of the oil storage chamber are connected through a pressure-stabilizing channel. The upper end of the drainage channel is connected to the oil guide channel for guiding the oil in the oil storage chamber into the oil guide channel. A gas introduction channel is provided at the upper end of the drainage channel, and the gas introduction channel is used to draw gas from the oil storage chamber when the drainage channel sucks the oil. The cross-sectional area of ​​the gas introduction channel is not greater than 30% of the cross-sectional area of ​​the channel opening at the upper end of the drainage channel. The gas introduction channel includes at least one of the following: an opening, provided on a side of one end of the drainage channel connected to the oil guide channel, wherein the upper end of the drainage channel is in sealed communication with the oil guide channel; A gap is formed between the interface connecting the upper end channel opening of the drainage channel and the upper end channel opening of the drainage channel; the gap is a radial gap formed between the inner wall of the interface and the drainage channel and / or an axial gap formed between the end face of the interface and the end face of the drainage channel.

2. The horizontal rotary compressor according to claim 1, characterized in that It includes a drainage tube, the internal tube cavity of the drainage tube is the drainage channel, the drainage tube includes a vertical tube section arranged vertically and a horizontal tube section whose one end is connected to the upper end of the vertical tube section and extends horizontally, the other end of the horizontal tube section is used to communicate with the central axis and the horizontal tube section is coaxially arranged with the central axis.

3. The horizontal rotary compressor according to any one of claims 1 to 2, characterized in that: The pressure stabilizing channel is provided with a flow blocking device, which prevents the oil in the oil storage chamber from flowing into the working chamber through the pressure stabilizing channel at least when the oil level in the oil storage chamber is lower than a predetermined height.

4. The horizontal rotary compressor according to claim 3, characterized in that: The flow blocking device includes one of the following: an extension tube, wherein the lower end of the extension tube is connected to the pressure-stabilizing channel, and the upper end of the extension tube is not lower than the axis of the central shaft, so as to prevent the oil in the oil storage chamber from flowing into the working chamber through the pressure-stabilizing channel when the oil level in the oil storage chamber is lower than the axis of the central shaft; A one-way valve is provided at the pressure-stabilizing channel to prevent the oil stored in the oil storage chamber from flowing into the working chamber through the pressure-stabilizing channel.

5. The horizontal rotary compressor according to claim 4, characterized in that: The one-way valve is arranged in the pressure-stabilizing channel, the lower end of the drainage channel is connected to the pressure-stabilizing channel, and an opening is arranged on the side of the lower end of the drainage channel, and the area of ​​the opening is not larger than the port area of ​​the pressure-stabilizing channel located at one end of the working chamber.

6. The horizontal rotary compressor according to claim 5, characterized in that It also includes a partition for dividing the shell cavity into the working chamber and the oil storage chamber. The partition is a sheet metal part, and a central hole is provided in the middle. The hole has a flange extending into the oil storage chamber to form a tube portion connected to the drainage channel, and the tube portion is connected to the oil guide channel.

7. The horizontal rotary compressor according to claim 6, characterized in that The shell includes a shell cavity, the shell includes a tubular shell and a first shell and a second shell arranged at both ends of the shell, the second shell has a barrel inserted into the shell, the edge of the partition has a connecting flange, and the connecting flange is in contact with the inner wall of the barrel or the inner wall of the shell.

8. The horizontal rotary compressor according to claim 7, characterized in that: The connecting flange of the partition is a cylindrical flange, and the cylindrical flange is in contact with the inner wall of the cylinder and has an interference fit, or the cylindrical flange is in contact with the inner wall of the tube shell and has an interference fit.

9. The horizontal rotary compressor according to claim 8, characterized in that The cylindrical flange is in contact with the inner wall of the end portion of the tube shell and abuts against the end surface of the cylindrical portion in the axial direction of the central axis.

10. The horizontal rotary compressor according to claim 6, characterized in that It also includes an exhaust muffler covered on the air outlet of the compression component, and a changing surface is provided at the air outlet end of the air outlet of the exhaust muffler.

11. The horizontal rotary compressor according to claim 10, characterized in that: The compression assembly is arranged between the motor assembly and the oil storage chamber, and the shell cavity is provided with an exhaust pipe on the side of the motor assembly away from the compression assembly. The motor assembly is provided with an air guide channel for introducing the high-pressure gas on the side of the motor assembly close to the compression assembly to the other side of the motor assembly.

12. The horizontal rotary compressor according to claim 11, characterized in that: The compression assembly divides the working chamber into a motor chamber and a buffer chamber. The air outlet of the compression assembly is located on one side of the compression assembly close to the oil storage chamber. The upper edge of the compression assembly is provided with a gas channel for connecting the motor chamber and the buffer chamber. The cross-sectional area of ​​the gas channel is larger than the cross-sectional area of ​​the air outlet of the exhaust muffler. The bottom of the motor chamber is connected to the bottom of the buffer chamber through an oil guide path.

13. The horizontal rotary compressor according to claim 12, characterized in that: The air outlet of the exhaust muffler is arranged opposite to the partition.

14. The horizontal rotary compressor according to claim 11, characterized in that The air outlet of the compression assembly is located on the side away from the oil storage chamber on both sides of the compression assembly. The compression assembly is arranged between the motor assembly and the oil storage chamber, and the compression assembly divides the working chamber into a motor chamber and a buffer chamber. The upper edge of the compression assembly is provided with a gas channel for connecting the motor chamber and the buffer chamber. The bottom of the motor chamber is connected to the bottom of the buffer chamber through an oil guide channel, and the pressure stabilizing channel is used to connect the buffer chamber with the oil storage chamber.

15. A horizontal rotary compressor comprising a housing and a motor assembly, a compression assembly and a central shaft arranged in a housing cavity of the housing. The shell cavity is separated into a working cavity and an oil storage cavity, wherein the motor assembly is located in the working cavity, and the working cavity is connected to the bottom of the oil storage cavity through a pressure stabilizing channel. The central shaft is in transmission connection with the motor assembly and the compression assembly, and an oil guide channel extending to the oil storage chamber and a radial outer through hole communicating with the oil guide channel are provided in the central shaft; It is characterized in that A drainage channel is provided in the oil storage chamber. One end of the drainage channel is connected to the oil guide channel, and an opening and / or gap is provided at the connection point to serve as a gas introduction channel. The other end is open and extends to the lower cavity of the oil storage chamber. The cross-sectional area of ​​the gas introduction channel is no more than 30% of the cross-sectional area of ​​the channel opening at the upper end of the drainage channel. Wherein, the opening is provided on the side of one end of the drainage channel connected to the oil guide channel, and the upper end of the drainage channel is sealed and connected to the oil guide channel; In which, the gap is used to connect the interface of the upper end channel opening of the drainage channel and the upper end channel opening of the drainage channel to form the gap, and the gap is the radial gap formed between the inner wall of the interface and the drainage channel and / or the axial gap formed between the end face of the interface and the end face of the drainage channel.

16. The horizontal rotary compressor according to claim 15, characterized in that The opening is a through hole arranged on the side of the drainage channel, and the gap is an annular gap formed by the drainage channel and the oil guide channel.

17. The horizontal rotary compressor according to any one of claims 15-16, characterized in that: The pressure stabilizing channel is provided with a flow blocking device, which prevents the oil in the oil storage chamber from flowing into the working chamber through the pressure stabilizing channel at least when the oil level in the oil storage chamber is lower than a predetermined height.

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