Vertical compressor and air conditioner

Abstract

The present application relates to the field of air conditioners, in particular to a vertical compressor and an air conditioner; the vertical compressor comprises: a shell, the bottom of which is provided with an oil pool for containing lubricating oil; a lower flange plate, which is provided with a through hole, the axis of the through hole being arranged in the up-down direction; a crankshaft, which is provided with a central oil hole, the lower end of the crankshaft being a short shaft; the short shaft is arranged in the through hole and can rotate around its own axis; the lower side of the lower flange plate is further provided with a protective cover covering the through hole, the protective cover is located below the lower end surface of the short shaft, and an oil suction cavity is formed between the protective cover and the lower end surface of the short shaft; the protective cover is provided with a mounting hole, the mounting hole is connected with the oil suction cavity and the oil pool, so as to reduce the disturbance of the lubricating oil in the oil pool when the crankshaft rotates at high speed.

Description

Technical Field

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

[0002] The development of compressors shows a trend towards miniaturization and high speed. Smaller compressors result in smaller internal volumes. When vertical compressors operate at higher frequencies, the rotation of the crankshaft inevitably disturbs the lubricating oil in the oil sump. The higher the crankshaft rotation speed, the greater the disturbance to the lubricating oil in the oil sump. When the lubricating oil is disturbed, it is easy for it to fail to receive oil effectively, leading to insufficient lubrication.

[0003] In existing technologies, the interference with the lubricating oil in the oil sump is often reduced by improving the force relationship between the crankshaft and the lubricating oil. However, this method has limited effectiveness. If the disturbance is reduced by increasing the height of the casing on a small series compressor, the cost will be higher than that on a large series compressor. Moreover, the increased height will raise the center of gravity, which is not conducive to stable operation. The installation conditions of the compressor will also be more restricted, making it not worthwhile.

[0004] There is currently no good solution for reducing the disturbance of crankshaft rotation to the lubricating oil in the oil sump without changing the external dimensions of the existing vertical compressor. Summary of the Invention

[0005] To reduce the disturbance to the lubricating oil in the oil sump when the crankshaft rotates at high speed, a vertical compressor and air conditioner are proposed.

[0006] On one hand, the present invention provides a vertical compressor, comprising:

[0007] The housing has an oil sump at its bottom for holding lubricating oil;

[0008] The lower flange has a through hole, the axis of which is arranged in the vertical direction;

[0009] A crankshaft having a central oil hole, the lower end of the crankshaft being a short shaft; the short shaft being rotatable about its own axis and passing through the through hole;

[0010] The lower flange is also provided with a protective cover covering the through hole. The protective cover is located below the lower end face of the short shaft, and an oil suction chamber is formed between the protective cover and the lower end face of the short shaft. The protective cover has a mounting hole that connects the oil suction chamber and the oil pool.

[0011] Preferably, an oil inlet pipe is provided in the mounting hole, and the upper end face of the oil inlet pipe is spaced apart from the lower end face of the short shaft.

[0012] Preferably, the diameter of the lower opening of the oil inlet pipe is larger than the diameter of the upper opening of the oil inlet pipe.

[0013] Preferably, the distance between the lower end face of the oil inlet pipe and the bottom wall of the oil tank is h, and the minimum diameter of the oil inlet pipe is d, where d ≥ h ≥ 0.5d.

[0014] Preferably, an oil guide plate is provided inside the crankshaft.

[0015] Preferably, the lower flange includes a downwardly projecting flange, the through hole is located on the flange, and a sound-absorbing cavity is formed between the protective cover and the peripheral side surface of the flange.

[0016] Preferably, the protective cover has an annular rib on the side facing the flange, and the annular rib surrounds the through hole.

[0017] Preferably, the lower side of the flange is provided with an annular groove, which is opposite to the annular rib.

[0018] Preferably, a sealing gasket is provided inside the annular groove.

[0019] On the other hand, the present invention also provides an air conditioner, including the aforementioned vertical compressor.

[0020] This invention forms an oil suction chamber below the lower end face of the short shaft by means of a protective cover. When the crankshaft rotates, it only disturbs the lubricating oil in the oil suction chamber, causing the lubricating oil level in the oil suction chamber to drop. The crankshaft hardly disturbs the lubricating oil outside the protective cover. The lubricating oil outside the protective cover enters the oil suction chamber through the mounting hole, thereby solving the technical problem of difficulty in oil suction and reduced reliability of the compressor caused by the disturbance of the short shaft part of the crankshaft to the oil sump. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a compressor structure in the prior art;

[0022] Figure 2 This is a schematic diagram of the structure of a vertical compressor according to an embodiment of the present invention;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is a schematic diagram of the structure of a vertical compressor according to another embodiment of the present invention.

[0025] The reference numerals in the attached figures are as follows:

[0026] 1. Housing; 2. Oil sump; 301. Lower flange; 302. Upper flange; 4. Oil inlet pipe; 5. Protective cover; 501. Annular rib; 6. Crankshaft; 601. Short shaft; 701. Spacing; 8. Oil guide plate; 901. Oil suction chamber; 902. Silencing chamber; 11. Cylinder. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in the embodiments of this invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. “Multiple” generally includes at least two, but does not exclude the inclusion of at least one.

[0029] It should be understood that the term "and / or" used in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship; "first" and "second" are used only to distinguish different technical features, not to indicate a chronological order; and "upper," "lower," "before," and "after" are used only to more conveniently illustrate the positional relationship of technical features and only have meaning when combined with actual usage or the specific location descriptions in the preceding text, and are not absolute positional relationships.

[0030] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0031] This invention relates to the field of air conditioners, specifically to a vertical compressor and an air conditioner. The development of compressors shows a trend towards miniaturization and higher speeds, with smaller compressors resulting in smaller internal volumes. When a vertical compressor operates at a higher frequency, the rotation of the crankshaft inevitably disturbs the lubricating oil in the oil sump within the compressor. The higher the crankshaft rotation speed, the greater the disturbance to the lubricating oil in the oil sump. Disturbed lubricating oil is prone to ineffective lubrication, leading to insufficient lubrication.

[0032] In existing technologies, the interference with the lubricating oil in the oil sump is often reduced by improving the force relationship between the crankshaft and the lubricating oil. However, this method has limited effectiveness. If the disturbance is reduced by increasing the height of the casing on a small series compressor, the cost will be higher than that on a large series compressor. Moreover, the increased height will raise the center of gravity, which is not conducive to stable operation. The installation conditions of the compressor will also be more restricted, making it not worthwhile.

[0033] To reduce the disturbance to the lubricating oil in the oil sump when the crankshaft rotates at high speed, a vertical compressor and air conditioner are proposed.

[0034] On the one hand, such as Figure 2-4 As shown, the present invention provides a vertical compressor, comprising: a housing 1 having an oil sump 2 at its bottom for containing lubricating oil; a lower flange 301 having a through hole with the axis of the through hole arranged vertically; a crankshaft 6 having a central oil hole, the lower end of the crankshaft 6 being a short shaft 601; the short shaft 601 being rotatable around its own axis and passing through the through hole; a protective cover 5 covering the through hole is also provided on the lower side of the lower flange 301, the protective cover 5 being located below the lower end face of the short shaft 601, and an oil suction chamber 901 is formed between the protective cover 5 and the lower end face of the short shaft 601; the protective cover 5 has a mounting hole that connects the oil suction chamber 901 and the oil sump 2.

[0035] In existing technologies such as Figure 1As shown, crankshaft rotation causes disturbance of the lubricating oil in the oil sump, affecting oil delivery. In this application, when the oil sump 2 contains lubricating oil, the lubricating oil enters the protective cover 5 through the mounting hole and partially contacts the short shaft 601 before entering the central oil hole. When the crankshaft 6 rotates, the short shaft 601 partially drives the lubricating oil to move upward through the central oil hole of the crankshaft 6 and enter the lubrication zone. Due to the presence of the protective cover 5 and the formation of an oil suction chamber 901 between the lower end face of the short shaft 601 and the mounting hole, the rotation of the short shaft 601 mainly affects the lubrication of the oil within the protective cover 5. The lubricating oil in the suction chamber 901 is disturbed, but this does not disturb the lubricating oil outside the protective cover 5. When the lubricating oil in the suction chamber 901 enters the central oil hole, the lubricating oil level in the suction chamber 901 drops, and the lubricating oil outside the protective cover 5 enters the suction chamber 901 through the mounting hole. This solves the technical problem of difficulty in oil suction and decreased reliability caused by the disturbance of the short shaft 601 of the crankshaft 6 to the oil sump 2. Because the disturbance to the oil sump 2 is reduced, the oil discharge rate of the compressor is also reduced accordingly.

[0036] Preferred, Anru Figure 2-3 As shown, an oil inlet pipe 4 is provided inside the mounting hole, and a gap 701 is formed between the upper end face of the oil inlet pipe 4 and the lower end face of the short shaft 601.

[0037] By setting up an oil inlet pipe 4, the lower end of which extends into the lubricating oil chamber, when the crankshaft 6 rotates, the lubricating oil in the oil suction chamber 901 flows upward, creating a negative pressure in the oil suction chamber 901. The oil suction chamber 901, through the oil inlet pipe 4, exerts a suction effect on the lubricating oil, accelerating its entry into the oil suction chamber 901 along the oil inlet pipe 4, thus ensuring the crankshaft 6's lubricating oil requirements. The spacer 701 ensures that the crankshaft 6 does not interfere with the oil suction pipe when rotating. The oil suction chamber 901 includes the spacer 701. The oil inlet pipe 4 and the protective cover 5 can be connected by resistance welding, high-frequency welding, or threaded connection.

[0038] Preferably, the diameter of the lower opening of the oil inlet pipe 4 is larger than the diameter of the upper opening of the oil inlet pipe 4.

[0039] The lower opening of the oil inlet pipe 4 is larger than the upper opening, which facilitates the entry of lubricating oil from the outside of the suction pipe into the suction pipe, and has a better drainage effect.

[0040] Preferred, such as Figure 3 As shown, the distance between the lower end face of the oil inlet pipe 4 and the bottom wall of the oil tank 2 is h, and the minimum diameter of the oil inlet pipe 4 is d, where d≥h≥0.5d.

[0041] If the distance between the lower end face of the oil inlet pipe 4 and the bottom wall of the oil sump 2 is too large, the lubricating oil level will drop significantly when the crankshaft 6 rotates at a high speed, making it easy for the oil inlet pipe 4 to separate from the lubricating oil. If the distance between the lower end face of the oil inlet pipe 4 and the bottom wall of the oil sump 2 is too small, it will not be conducive to the lubricating oil entering the oil inlet pipe 4. If d ≥ h ≥ 0.5d, it can ensure that the oil inlet pipe 4 is in contact with the lubricating oil, and also ensure that there is enough space between the lower end face of the oil inlet pipe 4 and the bottom wall of the oil sump 2 so that the lubricating oil can enter the oil inlet pipe 4 from the outside, ensuring the smooth flow of the lubricating oil.

[0042] Preferred, such as Figure 3 As shown, an oil guide plate 8 is provided inside the crankshaft 6.

[0043] The rotation of crankshaft 6 drives the oil guide plate 8 to rotate. The rotation of oil guide plate 8 has a circumferential pushing effect on the lubricating oil entering crankshaft 6, which increases the centrifugal force on the lubricating oil, which is conducive to the flow of lubricating oil in crankshaft 6 and to the suction effect of crankshaft 6 on lubricating oil at low speed, thus ensuring the lubrication effect at low speed.

[0044] Preferred, such as Figure 2 As shown, the lower flange 301 includes a downwardly projecting flange, a through hole located on the flange, and a sound-absorbing cavity 902 formed between the protective cover 5 and the peripheral side of the flange.

[0045] When the compressor has a downward exhaust channel, the high-pressure gas discharged downward passes through the silencer 902 and then flows upward through the cylinder 11 and the upper flange 302 before exiting. The flow of high-pressure gas in the silencer 902 reduces noise generation. At the same time, the lubricating oil outside the silencer 902 has an energy absorption effect, which is equivalent to the outside of the silencer 902 being wrapped with lubricating oil. The lubricating oil wrapped outside the silencer 902 can further reduce the noise generated by the high-pressure gas and dampen vibration.

[0046] When the silencing cavity 902 is not set, such as Figure 4 As shown, the protective cover 5 can be directly welded to the flange of the lower flange 301.

[0047] Preferred, such as Figure 3 As shown, the protective cover 5 has an annular rib 501 on the side facing the flange, and the annular rib 501 surrounds the through hole.

[0048] The annular rib 501 is formed by the recess on the side of the protective cover 5 facing away from the flange, causing the side facing the flange to protrude. The annular rib 501 helps to improve the sealing between the protective cover 5 and the flange, preventing lubricating oil from the oil suction chamber 901 from entering the silencing zone, thus increasing the oil discharge rate; it also prevents high-pressure gas from the silencing zone from entering the oil suction chamber 901, causing high-pressure gas leakage. When the high-pressure gas flows upward through the pump body, that is, when the compressed high-pressure gas does not flow out from the lower flange 301, there is no need to set up the silencing chamber 902, and the protective cover 5 can be welded to the flange.

[0049] Preferably, the lower side of the flange is provided with an annular groove, which is opposite to the annular rib 501.

[0050] By setting an annular groove, the annular rib 501 is inserted into the annular groove and forms a labyrinth seal with the annular groove, which improves the sealing performance between the protective cover 5 and the flange.

[0051] Preferably, a sealing gasket is provided inside the annular groove.

[0052] By setting a sealing gasket in the annular groove, the sealing performance between the protective cover 5 and the flange is further improved. The sealing gasket has a certain energy absorption effect, which can reduce the noise and vibration generated by high-pressure gas.

[0053] On the other hand, the present invention also provides an air conditioner, including the above-mentioned vertical compressor.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A vertical compressor, characterized by, include: The housing (1) has an oil sump (2) at its bottom for holding lubricating oil. The lower flange (301) has a through hole, the axis of which is arranged vertically. The crankshaft (6) has a central oil hole, and the lower end of the crankshaft (6) is a short shaft (601); the short shaft (601) is rotatable around its own axis and passes through the through hole; The lower flange (301) is also provided with a protective cover (5) covering the through hole. The protective cover (5) is located below the lower end face of the short shaft. An oil suction chamber (901) is formed between the protective cover (5) and the lower end face of the short shaft (601). The protective cover (5) has a mounting hole that connects the oil suction chamber (901) and the oil pool (2). The lower flange (301) includes a downwardly protruding flange, the through hole is located on the flange, and a silencing cavity (902) is formed between the protective cover (5) and the peripheral side of the flange; the lubricating oil in the oil sump (2) surrounds the outside of the silencing cavity (902); the protective cover (5) is provided with annular ribs (501) on the side facing the flange, and the annular ribs (501) are arranged around the through hole; The lower side of the flange is provided with an annular groove, which is opposite to the annular rib (501). An oil inlet pipe (4) is provided in the mounting hole. The diameter of the lower opening of the oil inlet pipe (4) is larger than the diameter of the upper opening of the oil inlet pipe (4). The distance between the lower end face of the oil inlet pipe (4) and the bottom wall of the oil tank (2) is h. The minimum diameter of the oil inlet pipe (4) is d, where d≥h≥0.5d. A gap (701) is formed between the upper end face of the oil inlet pipe (4) and the lower end face of the short shaft (601); a sealing gasket is provided in the annular groove.

2. The vertical compressor according to claim 1, characterized in that, An oil guide plate (8) is provided inside the crankshaft (6).

3. An air conditioner characterized by comprising: Includes the vertical compressor as described in any one of claims 1-2.

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