Swing type oil level alarm used in rotor compressor

Abstract

The invention provides a swing type oil level alarm used in a rotor compressor, the swing type oil level alarm comprises a base, an oil level detection assembly and an external inductor, the base is arranged in the compressor, and the oil level detection assembly is arranged on the base in a deflectable mode and used for detecting the oil level in the compressor; the external inductor is arranged outside the compressor, and the external inductor is matched with the oil level detection assembly and used for transmitting the oil level in the compressor. The base can be arranged on the inner circumferential face of the side wall of the compressor shell or arranged on the top end face of the lower shell cover of the compressor, and the external inductor is arranged on the outer circumferential face of the side wall of the shell of the compressor or arranged on the bottom end face of the lower shell cover of the compressor, so that the space of the lower portion and the side face of the rotor compressor can be effectively utilized; the height of the compressor shell does not need to be increased, and cost control is better; and the original appearance of the compressor can be kept unchanged, so that the system matching of a client is facilitated, the use of the client is facilitated, and the improvement cost of an air conditioner manufacturer is reduced.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment technology, and in particular to a swing-type oil level alarm for use in a rotary compressor. Background Technology

[0002] In the prior art, the magnetic float of the oil level sensor for compressors is usually made of polytetrafluoroethylene (PTFE, also known as Teflon) to form the float body, and then a certain number of magnets are fixed on the float body to form a solid magnetic float.

[0003] Because the density of polytetrafluoroethylene (PTFE) is approximately 2.3 g / cm³, while the magnet occupies a relatively small volume within the magnetic float, with a density of about 6 g / cm³, and the density of the lubricating oil inside the compressor is typically 0.85–0.95 g / cm³, the magnetic float cannot simply rely on its own buoyancy to follow the oil surface fluctuations; it clearly requires an external force. Therefore, current oil level sensors generally incorporate a buoyancy spring beneath the magnetic float to propel it.

[0004] Because the buoyancy spring needs to be vertically positioned at the bottom of the compressor, and because the bimetallic strip in the buoyancy spring requires fixed space on both sides, movement space for the bimetallic strip, and encapsulation space for the bimetallic strip, the overall oil level alarm needs to have a certain height in the vertical direction at the bottom of the compressor.

[0005] Secondly, since the float needs to work stably on the guide rod, and the internal magnet needs to cooperate with the bimetallic strip inside the buoyancy spring with a certain precision, and given the fluctuations and bubbles in the oil surface, the float needs to have a certain volume to ensure that it can withstand the effects of shaking and vibration. Therefore, the oil level alarm also needs a certain amount of space in the horizontal direction at the bottom of the compressor.

[0006] In summary, currently, to accommodate a magnetic levitation ball type oil level alarm, the compressor requires additional lower space for placement, increasing both cost and vertical space requirements. This also increases the compressor's vertical space requirements within the air conditioning system. Furthermore, some customers experience compatibility issues due to the standard outdoor unit casing of their air conditioning systems. Summary of the Invention

[0007] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a swing-type oil level alarm for use in a rotary compressor, so as to solve the problems existing in the prior art using a float-type oil level alarm.

[0008] To achieve the above and other related objectives, the present invention provides a swing-type oil level alarm for a rotary compressor, comprising a base, an oil level detection component, and an external sensor. The base is disposed inside the compressor, and the oil level detection component is rotatably disposed on the base for detecting the oil level inside the compressor. The external sensor is disposed outside the compressor and cooperates with the oil level detection component to transmit the oil level inside the compressor.

[0009] Preferably, the oil level detection assembly includes a connecting rod, a float, and an internal sensor. The connecting rod is rotatably connected to the base, and the end of the connecting rod away from the base is fixedly connected to the float. The internal sensor is disposed at the end of the connecting rod away from the float or on the float.

[0010] Preferably, the connecting rod has curvature along the extension direction of the rod body.

[0011] Preferably, the connecting rod and the float are either an integral part or separate parts.

[0012] Preferably, it also includes a deflection limiting component, which is used to limit the angle of deflection of the connecting rod around the base.

[0013] Preferably, the angle range of the connecting rod deflection around the base is 30° to 180°.

[0014] Preferably, the connecting rod has a connecting rod through hole, which is sleeved on the outer side of the outer circumferential surface of the base; the deflection limiting component is external and is disposed between the base and the connecting rod through hole, used to limit the angle of deflection of the connecting rod around the base.

[0015] Preferably, a deflection connection assembly is further provided between the connecting rod and the base, and the connecting rod deflects around the base through the deflection connection assembly; the deflection limiting assembly is fixedly provided on the base to limit the angle of deflection of the connecting rod around the base, or the deflection limiting assembly is fixedly provided on the connecting rod to limit the angle of deflection of the connecting rod around the base, or the deflection limiting assembly is provided on both the connecting rod and the base to limit the angle of deflection of the connecting rod around the base.

[0016] Preferably, the external sensor is disposed on the outer peripheral surface of the side wall of the compressor housing, or on the outer end surface of the bottom of the compressor lower cover, or on the outer peripheral surface of the side wall of the compressor lower cover.

[0017] Preferably, the base is disposed on the inner circumferential surface of the side wall of the compressor housing, or on the inner end surface of the bottom of the compressor lower cover, or on the inner circumferential surface of the side wall of the compressor lower cover.

[0018] As described above, the swing-type oil level alarm for rotary compressors of the present invention has the following beneficial effects: The present invention relates to a swing-type oil level alarm for use in a rotary compressor. The base can be set on the inner circumferential surface of the side wall of the compressor housing or on the top surface of the lower cover of the compressor. The external sensor is set on the outer circumferential surface of the side wall of the compressor housing or on the bottom surface of the lower cover of the compressor. This effectively utilizes the space at the bottom and sides of the rotary compressor, without increasing the height of the compressor housing, resulting in better cost control. At the same time, since the compressor can maintain its original shape, it is more conducive to system matching with customers and easier for customers to use, reducing the modification costs for air conditioning manufacturers. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the spatial structure of the swing-type oil level alarm device used in a rotary compressor according to the present invention; Figure 2 This is a schematic diagram of the installation of the swing-type oil level alarm device of the present invention in a rotary compressor; Figure 3 This is a schematic diagram showing the oil level in the swing-type oil level alarm of the present invention when the oil level is sufficient; (the internal sensor is located on the float). Figure 4 This is a schematic diagram illustrating the insufficient oil level in the swing-type oil level alarm device used in a rotary compressor according to the present invention; (the internal sensor is located on the float). Figure 5 This is a schematic diagram showing the oil level in the swing-type oil level alarm of the present invention when the oil level is sufficient; (the internal sensor is mounted on the connecting rod). Figure 6 This is a schematic diagram illustrating the insufficient oil level in the swing-type oil level alarm device used in a rotary compressor according to the present invention; (the internal sensor is mounted on the connecting rod). Figure 7 This is a connection diagram of the swing-type oil level alarm used in a rotary compressor according to the present invention; (the base is set on the side wall of the housing). Figure 8 This is a schematic diagram of the first structure of the deflection connection assembly in the swing-type oil level alarm for a rotary compressor according to the present invention. Figure 9 This is a schematic diagram of the second structure of the deflection connection assembly in the swing-type oil level alarm device used in a rotary compressor according to the present invention; Figure 10 This is a schematic diagram showing the angle of deflection of the connecting rod around the base in the swing-type oil level alarm device used in a rotary compressor according to the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Float; 2. Linkage rod; 3. Base; 4. Deflection limit assembly; 5. External sensor; 6. Internal sensor; 7. Deflection connection assembly; 71. Universal joint; 72. Ring clamp; 73. Bearing; 8. Lower cover; 9. Housing. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0022] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0023] like Figures 1-9 As shown, the present invention provides a swing-type oil level alarm for a rotary compressor, including a base 3, an oil level detection component and an external sensor 5. The base 3 is disposed inside the compressor, and the oil level detection component is rotatably disposed on the base 3 for detecting the oil level inside the compressor. The external sensor 5 is disposed outside the compressor and cooperates with the oil level detection component to transmit the oil level inside the compressor.

[0024] The present invention relates to a swing-type oil level alarm for a rotary compressor, wherein the oil level detection component is rotatably mounted on the base 3. When the oil level in the compressor decreases, the oil level detection component will rotate around the base 3 according to the height of the oil level, thereby establishing a signal connection or disconnection with the external sensor 5. At this time, the external sensor 5 will provide feedback on the oil level in the compressor, thereby realizing oil level monitoring and alarm.

[0025] Preferred, such as Figures 1-7 As shown, the oil level detection assembly includes a connecting rod 2, a float 1, and an internal sensor 6. The connecting rod 2 is rotatably connected to the base 3, and the end of the connecting rod 2 away from the base 3 is fixedly connected to the float 1. The internal sensor 6 is disposed at the end of the connecting rod 2 away from the float 1 or on the float 1. Further, in this embodiment, the external sensor 5 is disposed on the outer peripheral surface of the side wall of the compressor housing 9, or on the outer end surface of the bottom of the compressor lower cover 8, or on the outer peripheral surface of the side wall of the compressor lower cover 8.

[0026] Furthermore, in this embodiment, the internal sensor 6 can be a magnet, and the external sensor 5 can be a magnetic sensor. In other embodiments, the internal sensor 6 and the external sensor 5 can also be other sensors.

[0027] The installation locations and sensing methods of the internal sensor 6 and the external sensor 5 are described in detail below: The first installation location and sensing method: The internal sensor 6 is installed on the float 1, and the external sensor 5 is installed on the outer end face of the bottom of the compressor's lower housing cover 8 (e.g., Figure 3 (As shown). When the oil level is high, the internal sensor 6 floats with the float ball 1 at the oil level. There is no signal transmission between the internal sensor 6 and the external sensor 5, and the external sensor 5 reports that no oil needs to be added. When the oil level drops, the internal sensor 6 moves downwards. Again, there is no signal transmission between the internal sensor 6 and the external sensor 5, and the external sensor 5 reports that no oil needs to be added. When the oil level continues to drop to the lower limit, the signal between the internal sensor 6 and the external sensor 5 is activated. The external sensor 5 reports that the oil level is too low and oil needs to be added, thus achieving the alarm function (e.g., ...). Figure 4 (As shown).

[0028] The second installation location and sensing method: The internal sensor 6 is mounted on the float 1, and the external sensor 5 is mounted on the outer circumferential surface of the side wall of the compressor housing 9. When the oil level is sufficient, the internal sensor 6 floats with the float 1 at the oil level, and the signal between the internal sensor 6 and the external sensor 5 is established. The external sensor 5 then indicates that no oil needs to be added. When the oil level drops, the internal sensor 6 moves downwards, maintaining the signal connection between the internal sensor 6 and the external sensor 5, which in turn indicates that no oil needs to be added. When the oil level continues to drop to the lower limit, the signal between the internal sensor 6 and the external sensor 5 is disconnected, and the external sensor 5 indicates that the oil level is too low and oil needs to be added, thus implementing the alarm function.

[0029] The third installation location and sensing method: The internal sensor 6 is located on the end of the connecting rod 2 away from the float 1, and the external sensor 5 is located on the outer end face of the bottom of the compressor's lower housing cover 8 (e.g., Figure 5(As shown). When the oil level is sufficient, float 1 floats on the oil level, and connecting rod 2 is positioned between float 1 and base 3. There is no signal transmission between internal sensor 6 and external sensor 5, and external sensor 5 indicates that oil filling is not required. When the oil level drops, internal sensor 6 deflects with connecting rod 2. Again, there is no signal transmission between internal sensor 6 and external sensor 5, and external sensor 5 indicates that oil filling is not required. When the oil level continues to drop to the lower limit, internal sensor 6 deflects with connecting rod 2 to the sensing position, connecting internal sensor 6 with external sensor 5. External sensor 5 then indicates that the oil level is too low and oil filling is needed, thus achieving the alarm function.

[0030] The fourth installation position and sensing method: The internal sensor 6 is located on the end of the connecting rod 2 away from the float 1, and the external sensor 5 is located on the outer circumferential surface of the side wall of the compressor housing 9. When the oil level is sufficient, the float 1 floats on the oil level, the connecting rod 2 is positioned between the float 1 and the base 3, and the signal between the internal sensor 6 and the external sensor 5 is connected. The external sensor 5 then reports that no oil needs to be added. When the oil level drops, the internal sensor 6 deflects along with the connecting rod 2, the signal between the internal sensor 6 and the external sensor 5 remains connected, and the external sensor 5 reports that no oil needs to be added. When the oil level continues to drop to the lower limit, the internal sensor 6 deflects along with the connecting rod 2 to the sensing position, the signal between the internal sensor 6 and the external sensor 5 is disconnected, and the external sensor 5 reports that the oil level is too low and oil needs to be added, thus achieving the alarm function.

[0031] In this embodiment, the external sensors 5 in the second and fourth installation positions can be set on the outer peripheral surface of the side wall of the lower cover 8 according to the actual situation.

[0032] Preferred, such as Figures 1-7 As shown, the connecting rod 2 has a curvature along the extension direction of the rod body. In this embodiment, the purpose of setting a certain curvature for the connecting rod 2 along the extension direction of the rod body is to enable the connecting rod 2 to extend along the circumferential curvature of the compressor housing, thereby reducing the space occupied by the connecting rod 2, further reducing the height of the compressor housing 9, and reducing manufacturing costs.

[0033] Preferred, such as Figure 1 As shown, the connecting rod 2 and the float 1 can be an integral part or separate parts. In this embodiment, the connecting rod 2 and the float 1 are made of polytetrafluoroethylene (PTFE), or of glass fiber reinforced plastic, or the connecting rod 2 can be made of either PTFE or glass fiber reinforced plastic, while the float 1 can be made of a different material. The connecting rod 2 and the float 1 can be integrally molded, or they can be separate parts and fixedly connected by means of threads, ultrasonic welding, etc.

[0034] Preferred, such as Figure 1 , Figure 10 As shown, it also includes a deflection limiting component 4, which is used to limit the angle of deflection of the connecting rod 2 around the base 3. In this embodiment, the angle of deflection of the connecting rod 2 around the base 3 ranges from 30° to 180°. The setting of the deflection limiting component can ensure that the connecting rod 2 and the float 1 will not collide with the bottom of the compressor housing due to excessively low oil level when the oil level is low, and can also ensure that the connecting rod 2 will not overturn due to excessively high oil level when the oil level is high, thus preventing the oil level detection component from completing the oil level detection work, thereby ensuring the safety and reliability of the oil level detection component during operation.

[0035] like Figure 8 As shown, in this application, a deflection connection assembly 7 can also be provided between the connecting rod 2 and the base 3 to better realize the function of the connecting rod 2 deflecting around the base 3. The deflection connection assembly 7 includes a ring clamp 72 and a universal joint 71. One of the ring clamp 72 and the universal joint 71 is fixedly connected to the base 3, and the other is fixedly connected to the connecting rod 2. The universal joint 71 is rotatably disposed in the ring clamp 72. Thus, when the oil level changes, the float 1 drives the connecting rod 2 to deflect, and the universal joint 71 rotates in the ring clamp 72. Further, as Figure 8 As shown, the bottom end of the connecting rod 2 is also provided with an extension, which can be used to install the internal sensor 6.

[0036] like Figure 9 As shown, the deflection connection assembly 7 can also use a bearing 73, wherein the connecting rod 2 has a connecting rod connection hole, the bearing 73 is fitted into the connecting rod connection hole, and the end of the base 3 is inserted into the inner ring of the bearing 73. Thus, when the oil level changes, the float 1 drives the connecting rod 2 to deflect, the outer ring of the bearing 73 rotates with the connecting rod 2, and the inner ring of the bearing 73 and the base 3 are in a stationary state.

[0037] Preferred, such as Figure 3 , Figure 7 As shown, the base 3 is disposed on the inner circumferential surface of the side wall of the compressor housing 9, or on the inner end face of the bottom of the compressor lower cover 8, or on the inner circumferential surface of the side wall of the compressor lower cover 8. In this embodiment, when the base 3 is disposed on the inner end face of the bottom of the compressor lower cover 8, the shape of the base 3 is L-shaped, wherein the vertical end of the base 3 is connected to the inner end face of the bottom of the lower cover 8, and the horizontal end of the base 3 is connected to the connecting rod 2 (e.g., Figure 3 (As shown). When the base 3 is set on the inner circumferential surface of the side wall of the compressor housing 9, the base 3 is in the shape of an "I". One end of the base 3 is connected to the inner circumferential surface of the side wall of the housing 9, and the other end is connected to the connecting rod 2. In this embodiment, when the base 3 is set on the side wall of the compressor housing 9, it can also be set on the side wall of the lower cover 8 according to the actual situation (e.g., Figure 7 (As shown).

[0038] The present invention relates to a swing-type oil level alarm for use in a rotary compressor, comprising an internal sensor 6 and an external sensor 5. The external sensor 5 can be disposed on the outer peripheral surface of the side wall of the compressor housing 9 or on the outer end face of the bottom of the compressor's lower cover 8. The internal sensor 6 can be disposed on the connecting rod 2 or the float 1. This utilizes the lower space of the compressor and the side space of the pump body within the compressor, achieving the addition of an oil level alarm function without changing the external structure of the compressor. The connecting rod 2 has a certain curvature, which reduces the space occupied by the connecting rod 2, thereby reducing the height of the compressor housing 9 and lowering manufacturing costs.

[0039] Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0040] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A swing-type oil level alarm for use in a rotary compressor, characterized in that: The device includes a base (3), an oil level detection component, and an external sensor (5). The base (3) is located inside the compressor. The oil level detection component is rotatably mounted on the base (3) and is used to detect the oil level inside the compressor. The external sensor (5) is located outside the compressor and works in conjunction with the oil level detection component to transmit the oil level inside the compressor.

2. The swing-type oil level alarm for a rotary compressor according to claim 1, characterized in that: The oil level detection assembly includes a connecting rod (2), a float (1) and an internal sensor (6). The connecting rod (2) is deflected to the base (3), and the end of the connecting rod (2) away from the base (3) is fixedly connected to the float (1). The internal sensor (6) is located at the end of the connecting rod (2) away from the float (1) or on the float (1).

3. The swing-type oil level alarm for a rotary compressor according to claim 2, characterized in that: The connecting rod (2) has curvature along the extension direction of the rod body.

4. The swing-type oil level alarm for a rotary compressor according to claim 2, characterized in that: The connecting rod (2) and the float (1) are either a single piece or separate pieces.

5. The swing-type oil level alarm for a rotary compressor according to claim 2, characterized in that: It also includes a deflection limiting component (4), which is used to limit the angle of deflection of the connecting rod (2) around the base (3).

6. The swing-type oil level alarm for a rotary compressor according to claim 5, characterized in that: The angle range of the connecting rod (2) deflecting around the base (3) is 30°~180°.

7. The swing-type oil level alarm for a rotary compressor according to claim 5, characterized in that: The connecting rod (2) has a connecting rod through hole, which is sleeved on the outer side of the outer circumference of the base (3); the deflection limiting component (4) is external and is set between the base (3) and the connecting rod through hole, and is used to limit the angle of deflection of the connecting rod (2) around the base (3).

8. The swing-type oil level alarm for a rotary compressor according to claim 5, characterized in that: A deflection connection component (7) is also provided between the connecting rod (2) and the base (3), and the connecting rod (2) deflects around the base (3) through the deflection connection component (7); the deflection limiting component (4) is fixedly provided on the base (3) to limit the angle of deflection of the connecting rod (2) around the base (3), or the deflection limiting component (4) is fixedly provided on the connecting rod (2) to limit the angle of deflection of the connecting rod (2) around the base (3), or the deflection limiting component (4) is provided on both the connecting rod (2) and the base (3) to limit the angle of deflection of the connecting rod (2) around the base (3).

9. The swing-type oil level alarm for a rotary compressor according to claim 1, characterized in that: The external sensor (5) is disposed on the outer peripheral surface of the side wall of the compressor housing (9), or on the outer end surface of the bottom of the compressor lower cover (8), or on the outer peripheral surface of the side wall of the compressor lower cover (8).

10. The swing-type oil level alarm for a rotary compressor according to claim 1, characterized in that: The base (3) is disposed on the inner circumferential surface of the side wall of the compressor housing (9), or on the inner end surface of the bottom of the compressor lower cover (8), or on the inner circumferential surface of the side wall of the compressor lower cover (8).

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