Oiling components and horizontal compressors

Abstract

The present invention provides an oiling assembly and a horizontal compressor, which relate to the technical field of air conditioners and solve the technical problem in the prior art that when the compressor is a variable frequency compressor, the oil supply is insufficient during low-frequency operation and the oil supply is excessive during high-frequency operation. The oiling assembly includes an oil cover, an upper oil chamber and a partition; the oil cover is sealed and connected to the lower flange to form the upper oil chamber; the partition divides the upper oil chamber into a first cavity and a second cavity; by moving the partition, the pressure loss of the refrigerant oil in the second cavity can be increased or reduced, thereby adjusting the amount of refrigerant oil supplied from the second cavity to the horizontal compressor. The present invention divides the upper oil chamber into a first cavity and a second cavity by setting a partition. The partition changes the volume of the second cavity by moving, increasing or reducing the pressure loss of the second cavity, thereby increasing the refrigerant oil supply at low frequencies and reducing the refrigerant oil supply at high frequencies.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, in particular to an oiling component and a horizontal compressor. Background Art

[0002] When existing horizontal compressors are in operation, the rotation of the rotor and the fan on the rotor creates negative pressure at the end of the crankshaft's long axis. The pressure of the discharged refrigerant acts on the refrigerant oil, creating pressure at the upper oil pipe inlet of the upper oil pipe assembly. Because the pressure at the upper oil pipe assembly inlet is greater than the negative pressure at the end of the crankshaft's long axis, the refrigerant oil flows from the upper oil pipe assembly into the upper end of the crankshaft's short axis. The refrigerant oil then flows through channels on the crankshaft to the various friction pairs, acting as a lubricant during the operation of the horizontal compressor, reducing operating friction and wear, and removing heat generated during operation. This upper oil pipe assembly structure is primarily suitable for fixed-frequency compressors with a constant speed. When the compressor is a variable-frequency compressor, problems such as excessive or insufficient oil supply may occur.

[0003] According to the principles of fluid mechanics, the total pressure loss in the pipeline includes the pressure loss along the pipeline and the local pressure loss. According to the formula of pressure loss along the pipeline Where λ represents the resistance coefficient along the way, which is related to the roughness of the pipeline, l represents the pipeline length, d represents the inner diameter of the pipeline, ρ represents the liquid density remains unchanged, and v represents the average liquid flow velocity remains basically unchanged. Since the distance from the upper oil pipe to the crankshaft oil suction port is very short, the pressure loss caused by the upper oil pipe assembly on the flow of refrigerant oil is mainly local pressure loss. The pressure loss of refrigerant oil from the upper oil pipe to the crankshaft oil suction port along the way can be ignored. It can be roughly assumed that the total pressure loss of refrigerant oil passing through the upper oil pipe assembly is According to the local pressure loss formula Among them, ζ is the local resistance coefficient, which is related to the size of the corner (there are usually other special structures in the piping system, such as elbows, sudden expansion or contraction of the flow channel, valves, tees, etc. When the liquid flows through the local area of these pipes, the flow velocity and direction are forced to change, forming a dead water area or vortex area. The liquid in this area does not participate in the main flow, but constantly swirls, accelerating the friction of the liquid or causing particle collisions, thus forming a corner. The larger the corner, the greater the energy loss of the liquid in the vortex area). The larger the corner value, the greater the local pressure loss. ρ is the liquid density, which remains unchanged, and v is the average flow velocity of the liquid, which remains basically unchanged. For example Figure 1 As shown, the refrigeration oil enters the upper oil chamber sealed by the oil cover 1', crankshaft 6' and lower flange 7' through the upper oil pipe 31'. Due to the impact of fluid collision, inertia and boundary layer, the refrigeration oil enters the upper oil chamber sealed by the oil cover 1', crankshaft 6' and lower flange 7'. Figure 1 The two right-angle positions on the right side of the middle oil cover 1' and the contact position between the upper oil chamber and the lower flange 7' (marked with spiral lines in the figure) form vortices, causing energy loss and pressure drop, resulting in local pressure loss at several corners of the upper oil chamber.

[0004] The applicant has discovered that the prior art has at least the following technical problems:

[0005] When the compressor is a variable frequency compressor, the energy loss of the refrigeration oil is large when working at low frequency, resulting in insufficient oil supply, and when working at high frequency, the compressor absorbs too much refrigeration oil, resulting in excessive oil supply. Summary of the Invention

[0006] The present invention aims to provide an oiling assembly and a horizontal compressor to address the prior art technical problems of variable-frequency compressors, which suffer from insufficient oil supply due to significant energy loss of refrigeration oil during low-frequency operation and excessive oil intake during high-frequency operation. The various technical effects of the preferred technical solutions provided by the present invention are detailed below.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] The present invention provides an oiling assembly, comprising an oil hood, an upper oil chamber and a partition; the oil hood is sealed and connected to a lower flange to form the upper oil chamber; the partition divides the upper oil chamber into a first cavity and a second cavity; by moving the partition, the pressure loss of the refrigerant oil in the second cavity can be increased or decreased, thereby adjusting the amount of refrigerant oil supplied from the second cavity to the horizontal compressor.

[0009] Optionally, the first cavity is adjacent to the end cover of the horizontal compressor, and the second cavity is adjacent to the crankshaft and lower flange of the horizontal compressor.

[0010] Optionally, the oiling assembly further includes a ventilation pipe, one end of which is connected to the pressure generating device, and the other end of which is connected to the first cavity.

[0011] Optionally, the pressure generating device can increase the pressure in the first cavity, push the partition to move toward the second cavity, and reduce the volume of the second cavity.

[0012] Optionally, the pressure generating device can reduce the pressure in the first cavity, push the partition to move toward the first cavity, and increase the volume of the second cavity.

[0013] Optionally, the oiling assembly further includes an oiling pipe, one end of which is in communication with the oil storage area of the horizontal compressor, and the other end of which is in communication with the second cavity.

[0014] Optionally, a balancing device is provided in the upper oil chamber, and the balancing device can enable the partition to slide horizontally in the upper oil chamber.

[0015] Optionally, the balancing device includes a first spring and a second spring, the first spring is arranged in the first cavity, and the second spring is arranged in the second cavity.

[0016] Optionally, one end of each of the first spring and the second spring abuts against the partition.

[0017] A horizontal compressor comprises any one of the above-mentioned oiling components.

[0018] Any of the above technical solutions can at least produce the following technical effects:

[0019] The present invention divides the upper oil chamber into a first cavity and a second cavity by providing a partition. The partition changes the volume of the second cavity by moving under the action of an external force, thereby increasing or decreasing the size of the corner near the partition. When the horizontal compressor is in a low-frequency operating state, the partition reduces the volume of the second cavity by moving, the corner near the partition is reduced, the pressure loss of the refrigerant oil in the second cavity is reduced, the refrigerant oil supply at low frequencies is increased, and the problem of insufficient refrigerant oil supply at low frequencies is solved. When the horizontal compressor is in a high-frequency operating state, the partition increases the volume of the second cavity by moving, the corner near the partition is increased, the pressure loss of the refrigerant oil in the second cavity is increased, thereby reducing the oil supply at high frequencies, thereby solving the problem of excessive refrigerant oil supply at high frequencies. By changing the refrigerant oil supply at low and high frequencies, the heat exchange and lubrication effects of the refrigerant oil can be better balanced, thereby improving the performance of the horizontal compressor and the reliability of its components. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 It is a schematic diagram of an oiling assembly in the prior art;

[0022] Figure 2 is a schematic diagram of the oiling assembly of the present invention;

[0023] Figure 3 It is a schematic diagram of a horizontal compressor of the present invention.

[0024] In the figure, 1, oil cover; 2, first cavity; 21, ventilation pipe; 22, first spring; 3, second cavity; 31, upper oil pipe; 32, second spring; 4, partition; 5, end cover; 6, crankshaft; 7, lower flange; 8, oil storage area. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0026] The present invention provides an oiling component, such as Figure 2-3 As shown, it includes an oil cover 1, an upper oil chamber, and a partition 4. The oil cover 1 is sealed with the lower flange 7 to form the upper oil chamber. The upper oil chamber is arranged between the lower flange 7 and the end cover 5. The refrigerant oil in the upper oil chamber enters the friction pairs of the horizontal compressor pump body through the oil suction port channel at the crankshaft 6. The partition 4 divides the upper oil chamber into a first cavity 2 and a second cavity 3. The partition 4 is a solid structure to prevent the refrigerant oil from entering the first cavity 2. The partition 4 is preferably made of a material with good elasticity such as rubber or plastic to better match the inner side of the upper oil chamber. The partition 4 slides by abutting against the upper and lower sides of the interior of the oil cover 1, allowing the partition 4 to move within the upper oil chamber without connecting the first cavity 2 and the second cavity 3, similar to a common piston. By moving the partition 4, the pressure loss of the refrigerant oil in the second cavity 3 can be increased or decreased, thereby adjusting the amount of refrigerant oil supplied from the second cavity 3 to the horizontal compressor. Under the action of external forces, such as fluid pressure, solid structure thrust, etc., the partition 4 moves closer to or away from the second cavity 3, changing the volume of the second cavity 3 and thus changing the size of the corner (the corner of the second cavity 3 is Figure 2The area marked by the middle spiral line, i.e., the vortex area formed by several acute angles around the second cavity 3, includes the contact position of the partition 4 in the second cavity 3 and the contact position of the lower flange 7 in the second cavity 3. The corner formed by the partition 4 in the contact position of the second cavity 3 will change with the movement of the partition 4. The pressure loss of the refrigerant oil in the second cavity 3 caused by this is achieved to adjust the amount of refrigerant oil entering the horizontal compressor through the second cavity 3. When the horizontal compressor is in a low-frequency operating state, the partition 4 reduces the volume of the second cavity 3 by movement, and the corner near the partition 4 is reduced, that is, the vortex area is reduced, and the pressure loss of the refrigerant oil in the second cavity 3 is reduced. That is, the pressure of the refrigerant oil entering the oil suction channel at the crankshaft 6 increases. The refrigerant oil then enters the horizontal compressor from the second cavity 3, and the flow rate of the refrigerant oil entering the channel inside the crankshaft 6 increases. This solves the problem of insufficient refrigerant oil supply at low frequencies, avoids the problem that the refrigerant oil cannot meet the lubrication requirements, which easily causes abnormal wear of the compressor and reduced reliability, and achieves a stable supply of refrigerant oil to the horizontal compressor to meet the refrigerant oil requirements of each friction pair in the pump body. When the horizontal compressor is in a high-frequency operating state, the partition 4 increases the volume of the second cavity 3 by moving, and the corner near the partition 4 increases, that is, the vortex area increases, the vortex phenomenon in the oiling assembly becomes more serious, and the pressure loss of the refrigerant oil in the second cavity 3 increases, that is, the refrigerant oil pressure entering the oil suction port channel at the crankshaft 6 becomes smaller, and then the refrigerant oil enters the horizontal compressor from the second cavity 3. The flow rate of the refrigerant oil entering the channel in the crankshaft 6 will decrease, thereby reducing the oil supply at high frequencies, solving the problem of excessive refrigerant oil supply at high frequencies, reducing the amount of oil discharged by the compressor, and avoiding excessive refrigerant oil affecting the heat exchange of the air-conditioning system and reducing the air-conditioning performance. By changing the refrigerant oil supply at low and high frequencies, a stable supply of refrigerant oil to the horizontal compressor is achieved, which can better balance the heat exchange and lubrication effects of the refrigerant oil, and improve the performance of the horizontal compressor and the reliability of its components.

[0027] As an optional embodiment, Figure 3 As shown, the first cavity 2 and the second cavity 3 are distributed on the left and right sides, and the partition 4 can be set vertically or tilted in the upper oil cavity. It is preferably set vertically to enable the partition 4 to move left and right better in the upper oil cavity. The first cavity 2 is adjacent to the end cover 5 of the horizontal compressor and is located on the left side of the upper oil cavity. The second cavity 3 is adjacent to the crankshaft 6 and the lower flange 7 of the horizontal compressor and is located on the right side of the upper oil cavity. The second cavity 3 is located on the right side, which makes it easy to change the volume of the second cavity 3 by controlling the pressure in the first cavity 2 to drive the partition 4 to move, so that the corner close to the partition 4 side increases or decreases, thereby changing the refrigerant oil pressure loss in the second cavity 3.

[0028] As an optional embodiment, Figure 2As shown, the oiling assembly also includes a ventilation pipe 21, which penetrates the end cover 5 and the oil cover 1 on the right side. One end of the ventilation pipe 21 is connected to a pressure generating device (not shown) outside the horizontal compressor. The pressure generating device can be a common small piston cylinder, hydraulic cylinder or micro air pump (which can be used for inflation and suction). The other end of the ventilation pipe 21 is connected to the first cavity 2, so that external gas can enter the first cavity 2 through the ventilation pipe 21. The pressure generating device can increase or decrease the pressure in the first cavity 2 by inputting gas of different pressures. The pressure generating device can increase the pressure in the first cavity 2 by means of inflation, etc., so that the pressure in the first cavity 2 is greater than the pressure in the second cavity 3. Under the action of pressure, the partition 4 is pushed toward the second cavity 3 to reduce the volume of the second cavity 3. The pressure generating device can reduce the pressure in the first cavity 2 by means of suction, etc., so that the pressure in the first cavity 2 is lower than the pressure in the second cavity 3. Under the action of pressure, the partition 4 is pushed toward the first cavity 2, thereby increasing the volume of the second cavity 3. For example, when a horizontal compressor uses R410A refrigerant, under normal operating conditions, the exhaust pressure of the compressor is approximately 3.35MPa, while the pressure in the second cavity 3 is slightly lower than 3.35MPa. The pressure generating device increases the pressure in the first cavity 2 to be higher than 3.35MPa. Under the action of air pressure, the partition 4 can be moved toward the second cavity 3, thereby reducing the volume of the second cavity 3. The pressure generating device also increases the pressure in the first cavity 2 to be lower than 3.35MPa, thereby enabling the partition 4 to be moved toward the first cavity 2, thereby increasing the volume of the second cavity 3. The pressure generating device makes the movement of the partition 4 easier to achieve.

[0029] As an optional embodiment, Figure 2-3 As shown, the oiling assembly further includes an upper oil pipe 31, which is a delivery conduit for the refrigerant oil. One end of the upper oil pipe 31 is connected to the oil storage area 8 of the horizontal compressor, and the other end is connected to the second cavity 3. When the horizontal compressor is running, the refrigerant oil in the oil storage area 8 below enters the second cavity 3 through the upper oil pipe 31 and then enters each friction pair.

[0030] As an optional embodiment, Figure 2As shown, a balancing device is provided within the upper oil chamber. This balancing device enables the partition 4 to slide horizontally within the upper oil chamber. This balancing device prevents the partition 4 from tipping over or tilting due to uneven force applied to different parts of the partition, which could affect its sliding within the upper oil chamber. The balancing device includes a first spring 22 and a second spring 32. The first spring 22 is disposed within the first cavity 2, and the second spring 32 is disposed within the second cavity 3. Preferably, both the first spring 22 and the second spring 32 are disposed transversely. This transverse arrangement allows the spring force to better align with the direction of movement of the partition 4, facilitating control of the movement of the partition 4. Furthermore, the free length of the first spring 22 and the second spring 32 (i.e., the length when no external force is applied to either end of the spring) is greater than the total length of the upper oil chamber. The first spring 22 is always compressed within the first cavity 2, and the second spring 32 is always compressed within the second cavity 3. The elastic coefficients of the first spring 22 and the second spring 32 are set according to usage requirements to avoid significantly hindering the movement of the partition 4 or preventing it from moving. One end of each of the first spring 22 and the second spring 32 abuts against the partition 4, while the other end of the first spring 22 abuts against the oil hood 1. A protrusion can be provided inside the left side of the oil hood 1 and inside the left side of the partition 4 to better secure the first spring 22. The other end of the second spring 32 abuts against the crankshaft 6 and the lower flange 7. A protrusion can be provided on the right side of the partition 4 and on the left side of the lower flange 7 to better secure the second spring 32. Preferably, the first spring 22 and the second spring 32 are positioned relative to each other, that is, at the same height, to better control the movement of the partition 4. The first spring 22 and the second spring 32 can also be configured with an outer diameter slightly smaller than the diameter of the inscribed circle of the upper oil chamber, so that the first spring 22 and the second spring 32 are secured by abutting against the inner side of the upper oil chamber. When the pressure difference between the first cavity 2 and the second cavity 3 is too large, the first spring 22 and the second spring 32 can act as a buffer, preventing the partition 4 from moving too quickly in a certain direction. Under the balancing action of the first spring 22 and the second spring 32, the equilibrium relationship between the first cavity 2 and the second cavity 3 can be expressed as:

[0031] P a S+k a x a =P b S+k b x b

[0032] Where: P a is the pressure in the first cavity 2, P b is the pressure in the second cavity 3, k a is the elastic constant of the first spring 22, x a is the compression deformation of the first spring 22, k b is the elastic constant of the second spring 32, x b is the compressive deformation amount of the second spring 32 , and S is the cross-sectional area of the diaphragm 4 .

[0033] A horizontal compressor includes the oiling assembly provided by the present invention. Through the oiling assembly of the present invention, when the horizontal compressor operates at different frequencies, the pressure loss of the refrigeration oil is changed by the left and right movement of the partition 4, so that the flow rate of the refrigeration oil and the oil supply of the compressor will not change significantly, avoiding the problems of excessive oil supply at high frequency and insufficient oil supply at low frequency, taking into account the heat exchange and lubrication effects of the refrigeration oil, achieving improvement in the performance of the horizontal compressor and the reliability of components, and helping to increase the service life of the horizontal compressor.

[0034] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An oiling component, characterized in that: The horizontal compressor comprises an oil cover, an upper oil chamber, and a partition; the oil cover is sealed and connected to the lower flange to form the upper oil chamber; the partition divides the upper oil chamber into a first chamber and a second chamber; by moving the partition, the pressure loss of the refrigerant oil in the second chamber can be increased or decreased, thereby adjusting the amount of refrigerant oil supplied from the second chamber to the horizontal compressor; The first cavity and the second cavity are distributed left and right, the first cavity is adjacent to the end cover of the horizontal compressor, and the second cavity is adjacent to the crankshaft and lower flange of the horizontal compressor; The oiling assembly further includes a ventilation pipe, one end of which is connected to the pressure generating device, and the other end of which is connected to the first cavity.

2. The oiling assembly according to claim 1, characterized in that The pressure generating device can increase the pressure in the first cavity, push the partition to move toward the second cavity, and reduce the volume of the second cavity.

3. The oiling assembly according to claim 1, characterized in that The pressure generating device can reduce the pressure in the first cavity, push the partition to move toward the first cavity, and increase the volume of the second cavity.

4. The oiling assembly according to claim 1, characterized in that The oiling assembly further includes an oiling pipe, one end of which is in communication with the oil storage area of the horizontal compressor, and the other end of which is in communication with the second cavity.

5. The oiling assembly according to claim 1, characterized in that A balancing device is provided in the upper oil chamber, and the balancing device can enable the partition to slide horizontally in the upper oil chamber.

6. The oiling assembly according to claim 5, characterized in that The balancing device includes a first spring and a second spring, wherein the first spring is disposed in the first cavity, and the second spring is disposed in the second cavity.

7. The oiling assembly according to claim 6, characterized in that One end of each of the first spring and the second spring abuts against the partition plate.

8. A horizontal compressor, characterized in that: The horizontal compressor comprises the oiling assembly according to any one of claims 1-7.

Images