Compressor lower cover, vertical compressor and air conditioner

Abstract

The invention discloses a compressor lower cover, a vertical compressor and an air conditioner, the compressor lower cover comprises a lower cover body, the lower cover body is provided with an oil pool for containing refrigeration oil, the oil pool is of a conical structure, and the wider end of the oil pool is located above the narrower end of the oil pool; when the compressor is in a horizontal or inclined working state, the oil level of refrigeration oil in the oil pool is higher than the effective surface of an oil pump of the compressor. According to the compressor, the oil pool is designed to be of the conical structure, compared with the prior art, in order to achieve the same horizontal state oil liquid level height, less refrigerant oil needs to be injected, the injection amount of the refrigerant oil is reduced, and then the overall weight of the compressor is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor lower cover, a vertical compressor and an air conditioner. Background Art

[0002] In some special occasions, such as the aviation field, the compressor will vibrate strongly at multiple angles and directions, which will put the compressor's installation reliability, vibration resistance and inclined oil return capabilities to the test.

[0003] Vertical compressors have better oil supply and electrical safety when tilted at multiple angles, but are generally only installed at the lower cover position, which results in a larger distance from the center of gravity to the installation position. They will shake frequently when subjected to vibration in harsh working conditions, and may even cause the connection to fail and break.

[0004] A Chinese patent with patent publication number CN113669229B discloses a compressor such as Figure 1-Figure 2 As shown, welding a second support leg on the compressor housing can resist vibrations at multiple angles and directions, broaden the use scope of the vertical compressor, make it suitable for external environments with vibrations at multiple angles and directions, and improve the reliability, safety and shock resistance of the connection between the compressor and the outside world.

[0005] However, this solution is suitable for one-piece welded iron shell scroll compressors, which are heavy and not suitable for fields with weight requirements. In addition, this solution uses an annular lower cover, which has more bottom space. In order to make the compressor refrigerant oil level higher than the effective surface of the oil pump during operation, sufficient refrigerant oil needs to be injected, which accounts for a large part of the compressor weight.

[0006] Aluminum shell scroll compressors are lighter and can be used in areas where weight is a concern, but they are mostly horizontal structures. If a vertical structure is used, the installation and oil supply methods need to be reconsidered. At present, there is a lack of lightweight vertical aluminum shell compressor solutions that can ensure oil supply at multiple angles and are vibration-resistant. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a compressor lower cover, a vertical compressor and an air conditioner, aiming to reduce the amount of refrigeration oil injected while ensuring the normal operation of the compressor.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] In the first aspect, the present invention provides a compressor lower cover, including a lower cover body, the lower cover body is provided with an oil pool for containing refrigerant oil, the oil pool is in a conical structure, and the wider end of the oil pool is located above the narrower end of the oil pool; when the compressor is in a horizontal or inclined working state, the oil level of the refrigerant oil in the oil pool is higher than the effective surface of the oil pump of the compressor.

[0010] Furthermore, the tapered angle of the oil pool is greater than or equal to the angle when the compressor is in a maximum tilted working state.

[0011] Furthermore, a plurality of bottom mounting seats are provided on the outer surface of the lower cover body, the bottom mounting seats are arranged along the axial direction of the lower cover body, and the upper ends of the bottom mounting seats are connected to the lower cover body.

[0012] Furthermore, the bottom mounting seat is provided with a vibration damping member.

[0013] In a second aspect, the present invention further provides a vertical compressor, comprising a shell and the above-mentioned compressor lower cover, wherein the shell is connected to the compressor lower cover, and the shell is located above the compressor lower cover.

[0014] Furthermore, a sealing ring is provided between the shell and the compressor lower cover.

[0015] Furthermore, at least one first mounting member is disposed on the outer surface of the shell, and the first mounting member is provided with a first mounting hole.

[0016] Furthermore, the first mounting member is arranged within a height range of the compressor stator.

[0017] Furthermore, at least one second mounting member is disposed on the outer surface of the shell, and the second mounting member is provided with a second mounting hole.

[0018] In a third aspect, the present invention further provides an air conditioner, comprising the vertical compressor mentioned above.

[0019] Compared with the prior art, the present invention has the following beneficial effects: a compressor lower cover, comprising a lower cover body, the lower cover body is provided with an oil pool for containing refrigeration oil, the oil pool is in a conical structure, and the wider end of the oil pool is located above the narrower end of the oil pool; when the compressor is in a horizontal or inclined working state, the oil level of the refrigeration oil in the oil pool is higher than the effective surface of the oil pump of the compressor. Compared with the prior art, the present invention designs the oil pool as a conical structure, so that less refrigeration oil needs to be injected to achieve the same horizontal state oil level height, thereby reducing the injection amount of refrigeration oil and thus reducing the overall weight of the compressor.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of a horizontal state of a compressor in the prior art;

[0023] Figure 2 It is a schematic diagram of the tilted state of a compressor in the prior art.

[0024] Figure 3 A schematic diagram of a compressor lower cover provided by a specific embodiment of the present invention Figure 1 ;

[0025] Figure 4 A schematic diagram of a compressor lower cover provided by a specific embodiment of the present invention Figure 2 ;

[0026] Figure 5 A schematic diagram of a compressor lower cover provided by a specific embodiment of the present invention Figure 3 ;

[0027] Figure 6 A comparison diagram of the use of a compressor lower cover provided by a specific embodiment of the present invention and a compressor lower cover of the prior art;

[0028] Figure 7 A structural schematic diagram of a vertical compressor provided by a specific embodiment of the present invention (horizontal working state);

[0029] Figure 8 A top view of a vertical compressor provided in a specific embodiment of the present invention;

[0030] Fig. 9 An exploded view of a vertical compressor provided by a specific embodiment of the present invention;

[0031] Fig.10 A schematic diagram of the structure of a shell in a vertical compressor provided in a specific embodiment of the present invention;

[0032] Fig.11 A schematic structural diagram of a casing in a vertical compressor provided in another specific embodiment of the present invention;

[0033] Fig.12 A cross-sectional view of a shell of a vertical compressor provided in a specific embodiment of the present invention;

[0034] Fig.13 A structural schematic diagram of a vertical compressor provided by a specific embodiment of the present invention (working state at maximum tilt angle).

[0035] Reference numerals

[0036] 1. Compressor lower cover; 11. Lower cover body; 111. Oil pool; 12. Bottom mounting seat; 13. Vibration damping member; 2. Shell; 21. Second mounting member; 211. Second mounting hole; 22. First mounting member; 221. First mounting hole; 3. Sealing ring; 4. Compressor stator; 100. Annular lower cover; 200. Refrigerant oil; 300. Effective surface of oil pump. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0043] In a compressor, the oil pump is generally a gear pump structure that actively supplies oil. It uses a pair of meshing gears to transport various liquids. The liquid enters the suction chamber through the rotation of the gears, and is then driven by the gears and discharged from the discharge chamber to achieve liquid transportation. The effective surface of the oil pump refers to the lowest operating height at which the oil level reaches the stable oil supply of the oil pump.

[0044] Figure 1 and Figure 2 The compressor using an annular lower cover 100 in the prior art is illustrated, which has a large bottom space. In order to make the liquid level of the compressor refrigeration oil 200 higher than the effective surface of the oil pump during operation, sufficient refrigeration oil 200 needs to be injected, resulting in an increase in the overall weight of the compressor.

[0045] like Figure 3-Figure 6As shown, an embodiment of the present invention provides a compressor lower cover 1, including a lower cover body 11, the lower cover body 11 is provided with an oil pool 111 for accommodating refrigerant oil 200, the oil pool 111 is in a conical structure, and the wider end of the oil pool 111 is located above the narrower end of the oil pool 111; when the compressor is in a horizontal or inclined working state, the oil level of the refrigerant oil 200 in the oil pool 111 is higher than the effective surface 300 of the compressor oil pump, ensuring the normal operation of the compressor.

[0046] like Figure 6 As shown, by designing the oil pool 111 as a conical structure, compared with the prior art, under the premise of the same installation and use diameter and the same installation and use height, in order to achieve the same horizontal oil level height, the compressor lower cover 1 structure of the present application can reduce the injection amount of the refrigerant oil 200 compared to the annular lower cover 100 in the prior art, thereby reducing the overall weight of the compressor.

[0047] The compressor lower cover 1 can be made of aluminum alloy or other lightweight materials to ensure that the weight can be effectively reduced while meeting the strength requirements. An oil pool 111 is provided at the lower part of the lower cover body 11. The oil pool 111 has a conical structure, with the wider end located above the narrower end. The conical angle of the oil pool 111 is designed to be greater than or equal to the inclination angle of the compressor in the maximum tilted working state. This design ensures that the refrigerant oil 200 in the oil pool 111 can always maintain the oil level higher than the effective surface of the oil pump regardless of whether it is in a horizontal or tilted state, ensuring the stable operation of the oil pump, thereby improving the lubrication effect of the compressor.

[0048] Generally, the taper angle of the oil pool 111 is greater than or equal to the angle when the compressor is in the maximum tilted working state, so as to ensure that the refrigeration oil 200 in the oil pool 111 can be effectively supplied to the oil pump in any working state (generally referring to the horizontal working state and the tilted working state). Specifically, assuming that the maximum tilt angle ∠A of the compressor is 30 degrees, the taper angle ∠B of the oil pool 111 can be set to at least 30 degrees or greater, such as 35 degrees or 40 degrees. This design can ensure that even when the compressor reaches the maximum tilted state, the oil level of the refrigeration oil 200 in the oil pool 111 remains above the effective surface 300 of the oil pump, thereby avoiding insufficient lubrication or damage to the oil pump due to lack of oil.

[0049] It should be noted that, since the cone angle ∠B of the oil pool 111 has an upper limit, the selection of the cone angle ∠B also needs to consider factors such as the weight of the refrigeration oil 200 allowed to be injected into the oil pool 111 and the effective surface 300 of the oil pump.

[0050] like Figure 4 As shown, a plurality of bottom mounting seats 12 are disposed on the outer surface of the lower cover body 11 . The bottom mounting seats 12 are arranged along the axial direction of the lower cover body 11 , and the upper ends of the bottom mounting seats 12 are connected to the lower cover body 11 .

[0051] Specifically, the bottom mounting seat 12 is generally in a columnar structure, and the number of the bottom mounting seats 12 is determined according to the overall size and weight of the compressor and the stability requirements of the actual installation scenario. Generally, three bottom mounting seats 12 are arranged, and the three bottom mounting seats 12 are evenly distributed around the outer surface of the lower cover body 11. The upper end of the bottom mounting seat 12 can be tightly connected to the lower cover body 11 by welding, and the welding method can be argon arc welding, which can ensure the high strength and sealing of the connection part, prevent loosening or cracking during the long-term operation and vibration of the compressor, and ensure that the mounting seat and the lower cover body 11 form a stable integrated structure.

[0052] The multiple bottom mounting seats 12 arranged along the axial direction can evenly distribute the weight load of the compressor as a whole, avoid stress concentration in a local area, and thus greatly improve the stability of the compressor when operating under different working conditions. For example, when the compressor is running at high speed or encounters a certain degree of external impact, the mounting seat can effectively suppress the shaking and displacement of the lower cover body 11, ensure the precise coordination of the internal mechanical structure, reduce the wear of parts caused by vibration, and extend the service life of the compressor.

[0053] Of course, the connection between the bottom mounting seat 12 and the lower cover body 11 can be fastened with bolts. Threaded holes are provided at the upper end of the bottom mounting seat 12 and the corresponding position of the lower cover body 11, and high-strength bolts are used to tighten and fix them. This method is convenient for subsequent maintenance and disassembly. When a certain component of the compressor needs to be inspected and replaced, the relevant components of the mounting seat can be quickly removed. The bottom mounting seat 12 and the lower cover body 11 can also be connected by riveting.

[0054] After the compressor is installed, due to the presence of the bottom mounting seat 12, the bottom of the lower cover body 11 can maintain a certain distance from the supporting plane (such as the ground), avoiding direct contact between the bottom of the lower cover body 11 and the supporting plane. This not only protects the lower cover body 11, but also facilitates the switching of the compressor between a horizontal working state and an inclined working state.

[0055] like Figure 5 As shown, in order to increase the axial vibration resistance of the compressor, the bottom mounting seat 12 is provided with a vibration damping member 13 .

[0056] The vibration damper 13 can be made of rubber material, such as natural rubber, which can effectively absorb and buffer the vibration energy generated by the compressor during operation. The vibration damper 13 and the bottom mounting seat 12 are connected by a bonding process, and the vibration damper 13 is tightly attached to the bottom of the bottom mounting seat 12 by using a high-strength rubber adhesive. The vibration damper 13 can be designed as a round or square flat structure, so that the large contact bottom surface can more evenly disperse the pressure from the compressor and improve the vibration reduction effect.

[0057] like Figure 3-Figure 13 As shown, an embodiment of the present invention further provides a vertical compressor, including a shell 2 and the above-mentioned compressor lower cover 1, the shell 2 is connected to the compressor lower cover 1, and the shell 2 is located above the compressor lower cover 1.

[0058] Vertical compressors generally have two working states, such as Figure 7 As shown, one is the horizontal working state, such as Fig.13 As shown, the other is an inclined working state. For the inclined working state, the inclination angle can be determined according to the actual situation, but should not exceed the designed maximum inclination angle. Thanks to the design of the compressor lower cover 1, no matter the compressor is in a horizontal or inclined working state, the oil level of the refrigeration oil 200 in the oil pool 111 is higher than the effective surface 300 of the oil pump of the compressor, which ensures the normal operation of the compressor and enables the compressor to have the effect of multi-angle inclined oil supply.

[0059] like Figure 7 As shown, in order to improve the sealing performance, a sealing ring 3 is provided between the shell 2 and the compressor lower cover 1. The sealing ring 3 can be made of fluororubber. Fluororubber has excellent oil resistance, high temperature resistance and chemical corrosion resistance, and can perfectly adapt to the working conditions of the compressor filled with refrigerant, refrigeration oil 200 and complex chemical environment.

[0060] The radial seal is preferably used for the installation of the sealing ring 3. If the axial seal is used, the gap between the housing 2 and the compressor lower cover 1 may be enlarged due to frequent axial vibration of the compressor, and the compression effect of the sealing ring 3 may be weakened, resulting in leakage problems.

[0061] like Figure 9-10 As shown, at least one first mounting member 22 is provided on the outer surface of the housing 2. The first mounting member 22 is provided with a first mounting hole 221. The first mounting member 22 is used for mounting and connecting with other external components. Generally, there are multiple first mounting members 22, preferably three, which are evenly distributed on the outer surface of the housing 2. The direction of the first mounting hole 221 can be horizontal or vertical. If the vibration resistance is considered, it is designed to be horizontal, which can better resist torsion and tilt; if the convenience of installation is considered, it is designed to be vertical. Figure 11-Figure 12 As shown, Fig.11 The direction of the first mounting hole 221 is vertical. Fig.12 In the embodiment, the direction of the first mounting hole 221 is horizontal.

[0062] The first mounting member 22 can improve the stability of the overall structure of the compressor after installation.

[0063] In one embodiment, if Fig.12As shown, the first mounting member 22 is arranged within the height range of the compressor stator 4. With such a design, since the compressor stator 4 is the part with the largest mass in the compressor, a large inertial force will be generated on the moving carrier. By arranging the first mounting member 22 near the stator 4, the lever arm can be shortened, the bending moment can be reduced, and the bearing capacity can be improved, and the stability and strength of the structure can be further improved.

[0064] In one embodiment, if Fig.10 As shown, at least one second mounting member 21 is also provided on the outer surface of the shell 2, and the second mounting member 21 is provided with a second mounting hole 211. The second mounting member 21 is arranged near the bottom of the shell 2, and the first mounting member 22 is located above the second mounting member 21. The second mounting member 21 plays a primary connecting function in the installation and connection between the compressor and the outside world. When the compressor is installed and fixed, the second mounting member 21 is connected first. The number of second mounting members 21 is generally multiple, preferably three, and the three are evenly distributed on the outer surface of the shell 2. The evenly distributed design ensures that the entire structure is more stable, reduces shaking or deflection caused by uneven force, reduces local stress concentration, and enhances the strength of the overall structure, making it stronger when subjected to external loads. The direction of the second mounting hole 211 is vertical.

[0065] The first mounting member 22 and the second mounting member 21 may be convex in shape, specifically circular or polygonal, etc. The first mounting member 22 and the second mounting member 21 may be a structure integrally formed with the shell 2, or a split structure. In the case of a split structure, they may be fixed by bolt connection or welding.

[0066] In one embodiment, the three first mounting members 22 and the three second mounting members 21 of the compressor are arranged in a staggered distribution, that is, the two do not overlap each other in the vertical projection state. Such a design can make the support interval angle of the compressor in the circumferential direction smaller, enhance the strength of the overall structure, make it stronger when bearing external loads, thereby facilitating installation and improving vibration resistance.

[0067] In one embodiment, the three bottom mounting seats 12, the three first mounting members 22 and the three second mounting members 21 are all arranged in a staggered manner, that is, the three do not overlap each other in a vertical projection state. Such a design can further facilitate installation and improve vibration resistance.

[0068] The embodiment of the present invention further provides an air conditioner, comprising the vertical compressor described above. Except for the vertical compressor described above, the remaining structures of the air conditioner can be the same as those in the prior art, and the remaining structures will not be described in detail herein.

[0069] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A compressor lower cover, characterized in that: It includes a lower cover body, which is provided with an oil pool for containing refrigerant oil. The oil pool is of a conical structure, and the wider end of the oil pool is located above the narrower end of the oil pool. When the compressor is in a horizontal or inclined working state, the oil level of the refrigerant oil in the oil pool is higher than the effective surface of the oil pump of the compressor.

2. A compressor lower cover according to claim 1, characterized in that: The tapered angle of the oil pool is greater than or equal to the angle when the compressor is in a maximum tilt working state.

3. A compressor lower cover according to claim 1 or 2, characterized in that: A plurality of bottom mounting seats are disposed on the outer surface of the lower cover body. The bottom mounting seats are arranged along the axial direction of the lower cover body, and the upper ends of the bottom mounting seats are connected to the lower cover body.

4. A compressor lower cover according to claim 3, characterized in that: The bottom mounting seat is provided with a vibration damping member.

5. A vertical compressor, characterized in that: It comprises a shell and a compressor lower cover according to any one of claims 1 to 4, wherein the shell is connected to the compressor lower cover, and the shell is located above the compressor lower cover.

6. The vertical compressor according to claim 5, characterized in that: A sealing ring is provided between the shell and the compressor lower cover.

7. The vertical compressor according to claim 5, characterized in that: At least one first mounting piece is disposed on the outer surface of the shell, and the first mounting piece is provided with a first mounting hole.

8. The vertical compressor according to claim 7, characterized in that: The first mounting member is arranged within a height range of the compressor stator.

9. The vertical compressor according to claim 5, characterized in that: The outer surface of the shell is also provided with at least one second mounting member, and the second mounting member is provided with a second mounting hole.

10. An air conditioner, characterized in that: A vertical compressor comprising any one of claims 5 to 9.

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