Horizontal scroll compressor

Abstract

The invention provides a horizontal scroll compressor. The horizontal scroll compressor comprises an orbiting scroll and a main bracket, the main support is provided with a first channel, a main bearing cavity and a second channel in the axial direction of the compressor, one port of the first channel abuts against one end face of the movable vortex plate, the other port of the first channel is connected with an oil pool of the compressor, and the two ends of the second channel are connected with the first channel and the main bearing cavity respectively. The first channel is provided with a switch unit, when the switch unit is in a first state, the first channel communicates with an oil pool of the compressor, and the second channel communicates with the first channel; and when the switch unit is in the second state, the first channel is not communicated with the oil pool of the compressor, and the second channel is not communicated with the first channel. According to the horizontal scroll compressor, low-temperature lubricating oil in the low-pressure cavity of the compressor is introduced into the main bearing cavity, so that the main bearing and the orbiting scroll bearing which are contained in the main bearing cavity are lubricated and cooled, accumulation of friction heat is reduced, and the service life of the main bearing, the service life of the orbiting scroll bearing and the service life of the compressor are prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field related to compressors, and in particular to a horizontal scroll compressor. Background Art

[0002] The scroll compressor is a high-efficiency, low-vibration positive displacement compressor widely used in refrigeration, air conditioning and industrial gas compression. The core components of the scroll compressor include the static scroll (fixed scroll) and the orbiting scroll (rotating scroll), which achieve gas compression through the meshing movement of the two. The main bearing and the orbiting scroll bearing support the high-speed rotation of the orbiting scroll and are key components to ensure the normal operation of the compressor.

[0003] When the scroll compressor is working, the main bearing and the orbiting scroll bearing are in a high-speed (thousands of revolutions per minute or even higher) rotation state. The high-speed rotation will generate significant friction heat inside the bearing. If there is not enough lubricating oil to lubricate and cool the bearing, the friction heat will accumulate rapidly, causing the bearing temperature to rise, which will in turn cause problems such as lubrication failure, material fatigue and thermal expansion, ultimately reducing the bearing life and even causing equipment failure.

[0004] In the prior art, a central oil hole is opened in the middle of the crankshaft along the axis, and an oil outlet hole and an axial oil return groove are opened at the main bearing position along the radial direction of the crankshaft. Utilizing the principle of differential pressure oil supply, the oil at the bottom of the compressor rises along the central oil hole, flows through the oil outlet hole and the oil return groove, and lubricates the bearings. However, the premise for achieving sufficient lubrication effect through the differential pressure oil supply scheme provided above is that: the rotation speed of the crankshaft must be large enough to form a sufficient pressure difference to provide power for the lubricating oil; the oil level must be higher than the oil inlet hole at the lower end of the central oil hole of the crankshaft, otherwise oil cannot be supplied even if there is a pressure difference. Therefore, it is an urgent problem to develop a scroll compressor whose oil supply mechanism introduces lubricating oil into the main bearing and the movable scroll bearing to increase the life of the compressor.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to those skilled in the art. Summary of the invention

[0006] In view of the problems in the prior art, the object of the present invention is to provide a horizontal scroll compressor, which can introduce low-temperature lubricating oil in a low-pressure chamber into a main bearing and a movable scroll bearing, thereby increasing the life of the compressor.

[0007] Specifically, an embodiment of the present invention provides a horizontal scroll compressor, which includes a movable scroll and a main support accommodated in a compressor housing;

[0008] The main support is provided with a first channel along the axial direction of the compressor, a main bearing cavity for accommodating a main bearing, and a second channel, one port of the first channel abuts against one end surface of the movable scroll, the other port of the first channel is connected to the oil pool of the compressor, and both ends of the second channel are respectively connected to the first channel and the main bearing cavity;

[0009] The first channel is provided with a switch unit, and when the switch unit is in a first state, the first channel is communicated with the oil pool of the compressor, and the second channel is communicated with the first channel;

[0010] When the switch unit is in the second state, the first passage is not connected to the oil pool of the compressor, and the second passage is not connected to the first passage.

[0011] According to some examples of the present invention, the switch unit includes a piston, an elastic member and a check valve;

[0012] A groove is provided on one end surface of the movable scroll facing the main support, and a first protrusion is provided in the groove;

[0013] A second protrusion is provided at one end of the piston facing the movable scroll;

[0014] Two ends of the elastic member are respectively in contact with the inner wall of the second channel and the other end of the piston;

[0015] The check valve is arranged at one end of the first passage facing the oil pool;

[0016] When the movable scroll moves, the first protrusion reciprocates toward or away from the second protrusion;

[0017] When the first protrusion approaches to abut against the second protrusion, the piston compresses the gas from its end surface to the check valve, and the air pressure in the first channel increases. When the air pressure is greater than or equal to a threshold, the check valve is in a closed state, and the switch unit is in a second state.

[0018] When the first protrusion abuts against and then moves away from the second protrusion, the air pressure in the first channel decreases. When the air pressure is less than the threshold, the check valve is in an open state, and the switch unit is in a first state.

[0019] According to some examples of the present invention, the groove is circular, and the first protrusion and the second protrusion are both hemispherical structures.

[0020] According to some examples of the present invention, the depth of the groove is T, the diameter of the hemispherical structure of the first protrusion is d1, and the diameter of the hemispherical structure of the second protrusion is d2, satisfying: T≥d1+d2.

[0021] According to some examples of the present invention, the diameter of the groove is D, and the eccentricity of the movable scroll relative to the center line of the crankshaft of the compressor is e, satisfying: D≥d2+2e.

[0022] According to some examples of the present invention, a diameter d1 of the first protrusion is greater than a diameter d2 of the second protrusion.

[0023] According to some examples of the present invention, when the piston is farthest from the check valve, the second channel is communicated with the first channel;

[0024] When the piston is close to the check valve, the piston blocks the port connecting the second channel to the first channel, and the second channel is not connected to the first channel.

[0025] The horizontal scroll compressor of the present invention can introduce the low-temperature lubricating oil in the low-pressure chamber of the compressor into the main bearing chamber, thereby lubricating and cooling the main bearing and movable scroll bearing accommodated therein, reducing the accumulation of friction heat, and increasing the life of the main bearing, movable scroll bearing and the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, purposes and advantages of the present invention will become more apparent. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same figure numbers in the figures represent the same or similar parts, and their repeated descriptions will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0027] Figure 1 It is a partial structural schematic diagram of a switch unit of a horizontal scroll compressor according to an embodiment of the present invention when it is in a first state;

[0028] Figure 2 It is a structural schematic diagram of a movable scroll according to an embodiment of the present invention;

[0029] Figure 3 is a schematic structural diagram of a piston according to an embodiment of the present invention; and

[0030] Figure 4 It is a schematic diagram of the partial structure of a horizontal scroll compressor when the switch unit is in the second state according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in the present invention. The present invention can also be implemented or applied through other different specific embodiments, and the details in the present invention can also be modified or changed according to different viewpoints and application systems without departing from the spirit of the present invention. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0032] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. The present invention can be embodied in many different forms and is not limited to the embodiments described herein.

[0033] In the representation of the present invention, the reference terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials or characteristics represented may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples represented in the present invention and the features of different embodiments or examples, unless they are contradictory.

[0034] In order to clearly describe the present invention, components not related to the description are omitted, and the same reference numerals are given to the same or similar components throughout the specification.

[0035] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.

[0036] When a device is said to be "on" another device, it may be directly on the other device, but there may also be other devices between it. In contrast, when a device is said to be "directly" on another device, there are no other devices between it.

[0037] Although the terms first, second, etc. are used to represent various elements in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. are represented. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate the existence of features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or more other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, will there be an exception to this definition.

[0038] The technical terms used herein are only used to refer to specific embodiments and are not intended to limit the present invention. The singular form used herein also includes the plural form as long as the sentence does not clearly indicate the opposite meaning. The meaning of "including" used in the specification is to specify specific characteristics, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.

[0039] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with the content of relevant technical literature and current disclosures, and unless defined, shall not be overly interpreted as ideal or very formal meanings.

[0040] The structure of the horizontal scroll compressor of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It can be understood that the various specific embodiments are not intended to limit the protection scope of the present invention.

[0041] Figure 1This is a schematic diagram of the local structure of the switch unit of the horizontal scroll compressor of an embodiment of the present invention when it is in the first state. Specifically, the horizontal scroll compressor includes a movable scroll 1 and a main bracket 2 accommodated in the compressor housing 9; in some embodiments, the compressor housing 9 and the main bracket 2 are an integrated structure, so as to reduce the vibration of the compressor during operation. At this time, the main bracket 2 is the middle housing of the compressor, and the compressor housing and the main bracket can also be a split structure. Of course, the horizontal scroll compressor also includes components such as a front shell assembly, a fixed scroll assembly, a crankshaft swing sleeve assembly, and a rear shell assembly, which will not be described in detail here.

[0042] The main bracket 2 is provided with a first channel 21 along the axial direction of the compressor, a main bearing cavity 22 accommodating a main bearing 221, and a second channel 23. One port of the first channel 21 abuts against one end surface of the movable scroll 1, and the other port of the first channel 21 is connected to the oil pool of the compressor (not shown in the figure). Both ends of the second channel 23 are respectively connected to the first channel 21 and the main bearing cavity 22; the first channel 21 is provided with a switch unit. When the switch unit is in a first state, the first channel 21 is connected to the oil pool of the compressor, and the second channel 23 is connected to the first channel 21; when the switch unit is in a second state, the first channel 21 is not connected to the oil pool of the compressor, and the second channel 23 is not connected to the first channel 21.

[0043] Figure 1 In the embodiment of the present invention, the switch unit includes a piston 211, an elastic member 212 and a check valve 213; Figure 2 It is a schematic structural diagram of a movable scroll according to an embodiment of the present invention. A groove 11 is provided on one end surface of the movable scroll 1 facing the main bracket 2. The groove 11 is provided at a position opposite to the port of the first channel 21 facing the movable scroll 1. A first protrusion 111 is provided in the groove 11.

[0044] Figure 3 The schematic diagram of the structure of the piston of an embodiment of the present invention is shown in FIG. A second protrusion 2111 is provided at one end of the piston 211 facing the movable scroll 1; the piston 211 may be a metal part, which is sealed with the first channel 21 through a sealing rubber ring, and an annular groove 2112 may be provided thereon to position the sealing rubber ring. The two ends of the elastic part abut against the inner wall of the second channel 23 and the other end of the piston 211. For example, the elastic part 212 may be a spring with a certain stiffness coefficient, and the inner wall of the second channel 2321 may be provided with an annular shape. The two ends of the elastic part 212 abut against the shoulder in the second channel 23 and one end of the piston 211, respectively. When the piston 211 reciprocates, the spring is compressed or released. When the movable scroll 1 moves to the uppermost end, the spring is preferably in an original length state without force or with a small amount of compression.

[0045] The check valve 213 is disposed at one end of the first channel 21 facing the oil pool. The check valve 213 is an automatic valve used to ensure the one-way flow of the lubricating oil in the first channel 21 and prevent the backflow of the lubricating oil in the first channel 21. When the check valve 213 is opened, the low-pressure refrigerant mixed with a portion of the lubricating oil flows from the oil pool through the check valve 213 into the first channel 21. Preferably, the position of the first channel 21 is lower than that of the oil pool.

[0046] When the scroll compressor is running, the movable scroll is driven by the main shaft in the compressor to perform a planar circular motion, which is called revolution. At the same time, the movable scroll will also perform an eccentric gyratory translation, that is, on the basis of revolution, the movable scroll will rotate in a small radius around the center of the fixed scroll. The radius of the orbit of the movable scroll is equal to the eccentricity e of the eccentric shaft, which is usually a few millimeters to more than ten millimeters.

[0047] In the process of the movable scroll 1 of the horizontal scroll compressor of the present invention making a 360° translation, there is a certain angle range so that the first protrusion 111 of the movable scroll 1 abuts against the second protrusion 2111 of the piston 211, and as the movable scroll 1 moves, the abutting position of the first protrusion 111 and the second protrusion 2111 changes, and accordingly, the position of the piston 211 in the first channel 21 changes. The above-mentioned movement of the movable scroll 1 can be regarded as a process in which the first protrusion 111 reciprocates to approach and move away from the second protrusion 2111 of the piston 211.

[0048] When the first protrusion 111 approaches to abut the second protrusion 2111, the first protrusion 111 abuts against and pushes the second protrusion 2111, thereby pushing the piston 211 to move with respect to the elastic member 212. When the movable scroll 1 moves to the lowest point in the vertical direction, the piston 211 moves closest to the check valve 213. In the process of the piston 211 approaching the check valve 213, the piston 211 blocks the port of the second channel 23 connecting the first channel 21, and the second channel 23 is not connected to the first channel, so that the volume of the end face of the compression piston 211 in the first channel 21 to the check valve 213 is reduced in the process of the piston 211 compressing the elastic member 212, and the air pressure in the first channel 21 increases. When the air pressure is greater than or equal to a threshold value, the check valve 213 is in a closed state, and the switch unit is in a second state. Figure 4 The diagram is a partial structural diagram of the switch unit of the horizontal scroll compressor in the second state. The threshold value here is the pressure condition required for the opening and closing of the check valve used, that is, the switch threshold value of the check valve, which depends on the valve type, structural design and working conditions.

[0049] When the first protrusion 111 abuts and then moves away from the second protrusion 2111, the first protrusion 111 and the second protrusion 2111 are not in contact, the force exerted on the second protrusion 2111 by the automatic scroll is reduced or even not exerted, and the piston 211 moves toward the movable scroll 1 due to the restoring force of the elastic member 212. When the movable scroll 1 moves to the highest point in the vertical direction, corresponding to the piston 211 moving farthest from the check valve 213, the volume from the end face of the piston 211 to the check valve 213 increases, and the air pressure in the first channel 21 decreases. When the air pressure is less than the above threshold, the check valve 213 is in an open state. In the start state, the switch unit is in the first state, the first channel 21 is connected to the oil pool of the compressor, and the low-pressure refrigerant mixed with a part of the lubricating oil flows into the first channel 21 through the check valve 213. It can be seen that if the second channel 23 is to be connected to the first channel 21, the port connecting the second channel 23 and the first channel 21 needs to be set below the connecting end of the piston 211 and the elastic member 212 in this state. For the convenience of processing, preferably, the second channel 23 is tilted, that is, when the first channel 21 and the second channel 23 are both cylindrical, the central axis of the two is not perpendicular. When the switch unit is in the first state, the low-pressure refrigerant mixed with a part of the lubricating oil flows from the first channel 21 through the second channel 23 into the main bearing cavity 22, so that the lubricating oil lubricates and cools the main bearing 221 in the main bearing cavity 22. Usually, the movable bearing 39 is also accommodated in the main bearing cavity 22, and the lubricating oil entering the main bearing cavity 22 can lubricate and cool the movable bearing 39. The check valve 213 opens and closes periodically with the movement of the movable scroll 1, so that the lubricating oil is continuously supplied to the main bearing cavity. At the same time, the horizontal scroll compressor of the present invention has low requirements on the initial oil volume and no requirements on the working conditions.

[0050] In order to better achieve the above effects, in some embodiments, the groove 11 can be circular, the first protrusion 111 is arranged on the bottom platform of the groove 11, the first protrusion 111 can be a hemispherical structure or an elliptical hemispherical structure, and the second protrusion 2111 can also be a hemispherical structure or an elliptical hemispherical structure. The hemispherical structure here does not need to be half of a sphere, but can be a part of a sphere, that is, the height of the hemispherical structure relative to the bottom platform of the groove 11 is less than the diameter of the sphere.

[0051] The depth of the groove 11 should be greater than or equal to the height of the first protrusion 111 in the groove 11 of the movable scroll 1. Furthermore, the depth of the groove 11 is T, the diameter of the hemispherical structure of the first protrusion 111 is d1, and it is set at the center of the circular groove 11, that is, the axis of the hemispherical structure of the first protrusion 111 coincides with the axis of the groove 11, and the diameter of the hemispherical structure of the second protrusion 2111 is d2, which satisfies: T≥d1+d2, ensuring that the contact between the movable scroll 1 and the main bracket 2 is always a planar contact. The diameter of the groove 11 is D, and the eccentricity of the movable scroll 1 relative to the center line of the crankshaft of the compressor is e, which satisfies: D≥d2+2e, so that when the movable scroll and the piston move, the second protrusion 2111 will not touch the inner wall of the groove 11.

[0052] When the top of the first protrusion 111 abuts against the top of the second protrusion 2111, the height of the first protrusion 111 is the compression amount of the elastic member 212. Preferably, the curvature of the first protrusion is greater than the curvature of the second protrusion, that is, when both are hemispherical structures, the diameter d1 of the first protrusion is greater than the diameter d2 of the second protrusion. In actual use, the specific structural parameters of the first protrusion 111 and the second protrusion 2111, the elastic parameters and length of the elastic member 212, and the structural parameters of the first channel 21 can be set in combination with parameters such as the switch threshold of the check valve 213.

[0053] In summary, the horizontal scroll compressor of the present invention can introduce the low-temperature lubricating oil in the low-pressure chamber of the compressor into the main bearing chamber, thereby lubricating and cooling the main bearing and movable scroll bearing contained therein, reducing the accumulation of frictional heat, and improving the life of the main bearing, movable scroll bearing and the compressor.

[0054] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

[0055] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A horizontal scroll compressor, characterized in that: The horizontal scroll compressor comprises a movable scroll and a main support accommodated in a compressor housing; The main support is provided with a first channel along the axial direction of the compressor, a main bearing cavity for accommodating a main bearing, and a second channel, one port of the first channel abuts against one end surface of the movable scroll, the other port of the first channel is connected to the oil pool of the compressor, and both ends of the second channel are respectively connected to the first channel and the main bearing cavity; The first channel is provided with a switch unit, and when the switch unit is in a first state, the first channel is communicated with the oil pool of the compressor, and the second channel is communicated with the first channel; When the switch unit is in the second state, the first passage is not connected to the oil pool of the compressor, and the second passage is not connected to the first passage.

2. The horizontal scroll compressor according to claim 1, characterized in that: The switch unit includes a piston, an elastic member and a check valve; A groove is provided on one end surface of the movable scroll facing the main support, and a first protrusion is provided in the groove; A second protrusion is provided at one end of the piston facing the movable scroll; Two ends of the elastic member are respectively in contact with the inner wall of the second channel and the other end of the piston; The check valve is arranged at one end of the first passage facing the oil pool; When the movable scroll moves, the first protrusion reciprocates toward or away from the second protrusion; When the first protrusion approaches to abut against the second protrusion, the piston compresses the gas from its end surface to the check valve, and the air pressure in the first channel increases. When the air pressure is greater than or equal to a threshold, the check valve is in a closed state, and the switch unit is in a second state. When the first protrusion abuts against and then moves away from the second protrusion, the air pressure in the first channel decreases. When the air pressure is less than the threshold, the check valve is in an open state, and the switch unit is in a first state.

3. The horizontal scroll compressor according to claim 2, characterized in that: The groove is circular, and the first protrusion and the second protrusion are both hemispherical structures.

4. The horizontal scroll compressor according to claim 3, characterized in that: The depth of the groove is T, the diameter of the hemispherical structure of the first protrusion is d1, and the diameter of the hemispherical structure of the second protrusion is d2, satisfying: T≥d1+d2.

5. The horizontal scroll compressor according to claim 4, characterized in that: The diameter of the groove is D, and the eccentricity of the movable scroll relative to the center line of the crankshaft of the compressor is e, satisfying: D≥d2+2e.

6. The horizontal scroll compressor according to claim 4, characterized in that: The diameter d1 of the first protrusion is greater than the diameter d2 of the second protrusion.

7. The horizontal scroll compressor according to claim 2, characterized in that: When the piston is farthest from the check valve, the second passage is communicated with the first passage; When the piston is close to the check valve, the piston blocks the port connecting the second channel to the first channel, and the second channel is not connected to the first channel.

Images