Oil supply structure, compressor and control method

Abstract

The application provides an oil supply structure, a compressor and a control method, which comprise: a mounting seat, which has a mounting cavity inside; an oil inlet pipeline, which is connected with the mounting seat and is used for feeding oil into the mounting seat; a component to be lubricated, which is connected with the mounting seat and is arranged correspondingly to the mounting cavity; so that the oil in the mounting seat flows through the component to be lubricated and accumulates in the mounting cavity; an oil return pipeline, which is communicated with the mounting cavity and is used for discharging the oil in the mounting cavity; and a cooling pipeline, which is communicated with the oil return pipeline and has a cooling fluid flowing therein, so that the cooling fluid in the cooling pipeline drives the oil in the oil return pipeline to flow. The oil supply structure solves the technical problem that the compressor is easily damaged due to lack of oil because of the accumulation of lubricating oil at the bottom of the compressor in the related art.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, specifically to an oil supply structure, a compressor, and a control method. Background Technology

[0002] Compressors are common household appliances. They typically require the flow of refrigerant, which usually contains oil. When the refrigerant passes through the guide vanes, the change in velocity, combined with the low pressure at the casing, causes the refrigerant to vaporize, releasing lubricating oil that gradually accumulates at the bottom of the casing. Current technology usually employs measures to drain this accumulated lubricating oil.

[0003] However, due to the low internal system pressure differential, there is no suitable high-pressure gas source as the ejector power source to eject the oil back, making it difficult to eject the oil back. Oil accumulates at the bottom of the casing, which can easily lead to insufficient oil supply and cause the compressor to seize and be damaged due to lack of oil.

[0004] Therefore, existing technologies need further development. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide an oil supply structure, compressor and control method to solve the technical problem in the related art that the compressor is prone to bearing failure due to lack of oil because the lubricating oil accumulates at the bottom of the compressor.

[0006] To achieve the above technical objectives, the present invention adopts the following technical solution: It provides an oil supply structure, comprising: a mounting base having a mounting cavity inside; an oil inlet pipe connected to the mounting base for supplying oil to the mounting base; a component to be lubricated connected to the mounting base, the component to be lubricated being correspondingly disposed with respect to the mounting cavity; so that the oil in the mounting base flows through the component to be lubricated and accumulates in the mounting cavity; a return oil pipe connected to the mounting cavity for discharging the oil in the mounting cavity; and a cooling pipe through which a cooling fluid for absorbing heat flows, the cooling pipe being connected to the return oil pipe so that the cooling fluid in the cooling pipe drives the oil in the return oil pipe to flow.

[0007] Furthermore, the oil supply structure also includes an ejector, which is installed on the return oil line and connected to the cooling line.

[0008] Furthermore, the oil supply structure also includes an oil tank for storing oil. One end of the oil inlet pipe is connected to the mounting base, and the other end of the oil inlet pipe is connected to the oil tank. One end of the oil return pipe is connected to the mounting base, and the other end of the oil return pipe is connected to the oil tank.

[0009] Furthermore, the oil supply structure also includes an energy storage tank, which has a first receiving cavity for containing oil and a second receiving cavity for containing cooling fluid. The oil inlet pipe passes through the first receiving cavity, one end of the cooling pipe is connected to the second receiving cavity, and the other end of the cooling pipe is connected to the oil return pipe.

[0010] Furthermore, the energy storage tank is provided with a partition, a first receiving cavity located on one side of the partition, and a second receiving cavity located on the other side of the partition. The partition is movably arranged so that the volume of the first receiving cavity and the second receiving cavity can be adjusted by moving the partition.

[0011] Furthermore, the energy storage tank is connected to the oil tank, and the first receiving cavity is located on the side of the second receiving cavity near the oil tank. An elastic element is provided in the first receiving cavity, one end of which is connected to the oil tank, and the other end of which is connected to the partition.

[0012] Furthermore, the oil supply structure also includes a regulating valve, which is installed on the oil inlet pipeline and is used to regulate the flow rate into the first receiving chamber.

[0013] Furthermore, the oil supply structure also includes a level sensor, which is installed inside the mounting cavity and is connected to the regulating valve via a signal connection.

[0014] A compressor includes an oil supply structure, wherein the oil supply structure is as described above.

[0015] A control method applicable to the above-mentioned oil supply structure includes: measuring the height h of the oil level in the mounting cavity; comparing h with a threshold H; if h < H, reducing the flow rate of the cooling fluid in the cooling pipe; if h ≥ H, increasing the flow rate of the cooling fluid in the cooling pipe.

[0016] Beneficial effects:

[0017] By applying the invented oil supply structure to a compressor, and by setting up an ejector and an energy storage tank, the oil pressure in the oil circulation loop is fully utilized to increase the cooling fluid pressure, thereby increasing the flow force of the oil in the return oil line, accelerating the flow of the mixed oil, thus speeding up the flow rate of the oil circulation loop, improving the return oil efficiency, and preventing oil from accumulating at the bottom of the mounting cavity. This solves the technical problem in related technologies where the compressor is prone to bearing seizure due to lack of oil because of the accumulation of lubricating oil at the bottom of the compressor. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the oil supply structure used in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the energy storage tank of the oil supply structure used in the embodiments of the present invention;

[0020] Figure 3 This is a schematic diagram of the installation cavity of the oil supply structure used in the embodiment of the present invention in the state of h < H;

[0021] Figure 4 This is a schematic diagram of the installation cavity of the oil supply structure used in the embodiment of the present invention, where h≥H.

[0022] The above figures include the following reference numerals:

[0023] 1. Mounting base; 11. Mounting cavity; 2. Oil inlet pipe; 3. Part to be lubricated; 4. Oil return pipe; 5. Cooling pipe; 6. Ejector; 7. Oil tank; 8. Energy storage tank; 81. First receiving cavity; 82. Second receiving cavity; 83. Baffle; 84. Elastic element; 85. Regulating valve; 86. Liquid level sensor. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] According to an embodiment of the present invention, an oil supply structure is provided; please refer to [link / reference]. Figures 1 to 4 The system includes: a mounting base 1, which has a mounting cavity 11 inside; an oil inlet pipe 2, which is connected to the mounting base 1 and is used to introduce oil into the mounting base 1; a component to be lubricated 3, which is connected to the mounting base 1 and is correspondingly arranged with respect to the mounting cavity 11, so that the oil in the mounting base 1 flows through the component to be lubricated 3 and accumulates in the mounting cavity 11; an oil return pipe 4, which is connected to the mounting cavity 11 and is used to discharge the oil in the mounting cavity 11; and a cooling pipe 5, in which a cooling fluid for absorbing heat flows, which is connected to the oil return pipe 4 so that the cooling fluid in the cooling pipe 5 drives the oil in the oil return pipe 4 to flow. By adding a cooling pipe 5 to the oil circulation loop, the cooling fluid in the cooling pipe 5 mixes with the oil in the return oil pipe 4, increasing the flow force of the oil in the return oil pipe 4 and accelerating the flow of the mixed oil. This increases the flow rate of the fluid in the return oil pipe 4, improves the return oil efficiency, and prevents oil from accumulating at the bottom of the mounting cavity 11. This solves the technical problem in related technologies where the compressor is prone to bearing failure due to lack of oil because of the accumulation of lubricating oil at the bottom of the compressor.

[0026] In the oil supply structure of this embodiment, see... Figure 1The oil supply structure also includes an ejector 6, which is installed on the return oil line 4, and the cooling line 5 is connected to the ejector 6. In this way, the pressure and velocity of the cooling fluid flowing in the cooling line 5 are greater than the oil in the return oil line 4. The cooling fluid flowing in the cooling line 5 enters the ejector 6, and the ejector 6 uses the cooling fluid flowing in the cooling line 5 to eject the oil in the return oil line 4, thereby accelerating the oil in the mounting cavity 11 and the return oil line 4.

[0027] In the oil supply structure of this embodiment, see... Figure 1 The oil supply structure also includes an oil tank 7, which stores oil. One end of the oil inlet pipe 2 is connected to the mounting base 1, and the other end of the oil inlet pipe 2 is connected to the oil tank 7. One end of the oil return pipe 4 is connected to the mounting base 1, and the other end of the oil return pipe 4 is connected to the oil tank 7. In this way, the oil in the mounting base 1 returns to the oil tank 7 through the oil return pipe 4, and the oil in the oil tank 7 enters the mounting base 1 through the oil inlet pipe 2, thus forming an oil circulation loop.

[0028] In the oil supply structure of this embodiment, see... Figure 1-2 The oil supply structure also includes an energy storage tank 8, which has a first receiving cavity 81 for containing oil and a second receiving cavity 82 for containing cooling fluid. The oil inlet pipe 2 passes through the first receiving cavity 81, one end of the cooling pipe 5 is connected to the second receiving cavity 82, and the other end of the cooling pipe 5 is connected to the return oil pipe 4. The energy storage tank 8 is provided with a partition 83. The first receiving cavity 81 is located on one side of the partition 83, and the second receiving cavity 82 is located on the other side of the partition 83. The partition 83 is movably arranged so that the volume of the first receiving cavity 81 and the second receiving cavity 82 can be adjusted by moving the partition 83.

[0029] Specifically, the above-mentioned arrangement utilizes the oil pressure in the first receiving cavity 81 to compress the cooling fluid in the second receiving cavity 82, thereby increasing the fluid pressure of the cooling fluid. The compressed cooling fluid is used as the power source for the ejector 6 to achieve oil return in the ejector mounting base 1. The above-mentioned arrangement makes full use of the oil pressure in the oil circulation loop to increase the cooling fluid pressure, thereby improving the oil return efficiency.

[0030] In the oil supply structure of this embodiment, see... Figure 1 The energy storage tank 8 is connected to the oil tank 7. The first receiving cavity 81 is located on the side of the second receiving cavity 82 near the oil tank 7. An elastic element 84 is provided in the first receiving cavity 81. One end of the elastic element 84 is connected to the oil tank 7, and the other end of the elastic element 84 is connected to the partition 83. In this way, by providing the elastic element 84, when the oil pressure in the first receiving cavity 81 decreases, the partition 83 can be retracted in time and return to its initial state.

[0031] In the oil supply structure of this embodiment, see... Figure 2The oil supply structure also includes a regulating valve 85, which is installed on the oil inlet pipe 2 and is used to regulate the flow rate into the first receiving chamber 81. Specifically, since the oil pump supply pressure of the oil tank 7 is fixed, it is necessary to both raise the oil level and pump it into the mounting base 1, and to use the oil supply pressure to compress the cooling fluid in the second receiving chamber 82. Therefore, it is necessary to distribute the oil pump supply pressure of the oil tank 7 to ensure the normal operation of the oil circulation loop.

[0032] In the oil supply structure of this embodiment, see... Figure 3-4 The oil supply structure also includes a level sensor 86, which is installed inside the mounting cavity 11 and is connected to the regulating valve 85. By installing the level sensor 86, the changes in the liquid level in the mounting cavity 11 are promptly fed back to the regulating valve 85, and the oil pump supply pressure in the oil tank 7 is adjusted based on the changes in the liquid level in the mounting cavity 11.

[0033] In some embodiments, a temperature sensor is provided in the mounting cavity 11. The oil temperature in the mounting cavity 11 reflects the bearing temperature. Therefore, when the oil temperature in the mounting cavity 11 is too high, the regulating valve 85 can be adjusted to reduce the cooling fluid pressure in the second receiving cavity 82, thereby increasing the oil supply in the oil inlet pipe 2 and reducing the bearing temperature.

[0034] The control method of this embodiment is applicable to the above-mentioned oil supply structure. The control method includes: measuring the height h of the oil level in the mounting cavity, and comparing h with a threshold H.

[0035] If h < H, then reduce the flow rate of the cooling fluid in cooling pipe 5;

[0036] If h≥H, then increase the flow rate of the cooling fluid in cooling pipe 5.

[0037] Specifically, during compressor operation, the level sensor 86 periodically detects the oil level in the mounting cavity 11 and promptly transmits the signal to the regulating valve 85. (See [reference]) Figure 3 When h < H, the flow rate of the cooling fluid in the cooling pipe 5 can be reduced, the regulating valve 85 can be adjusted to reduce the pressure of the cooling fluid in the second receiving chamber 82, reduce the return oil speed, and increase the oil supply of the oil inlet pipe 2. When h ≥ H, the flow rate of the cooling fluid in the cooling pipe 5 can be increased, the regulating valve 85 can be adjusted to increase the pressure of the cooling fluid in the second receiving chamber 82, accelerate the ejector 6 to eject the oil body, increase the return oil speed, and reduce the oil supply of the oil inlet pipe 2.

[0038] The compressor of the present invention includes an oil supply structure, which is the oil supply structure described above.

[0039] Applying the oil supply structure of this embodiment to a compressor, by setting an ejector 6 and an energy storage tank 8, the oil pressure in the oil circulation loop is fully utilized to increase the cooling fluid pressure, which increases the flow force of the oil in the return oil line 4, accelerates the flow of the mixed oil, thereby speeding up the flow rate of the oil circulation loop, improving the return oil efficiency, and preventing oil from accumulating at the bottom of the mounting cavity 11. This solves the technical problem in related technologies where the compressor is prone to bearing failure due to lack of oil because of the accumulation of lubricating oil at the bottom of the compressor.

[0040] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0041] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0042] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0043] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0044] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An oil supply structure, characterized in that, include: Mounting base (1), the mounting base (1) having a mounting cavity (11) inside; Oil inlet pipe (2), the oil inlet pipe (2) is connected to the mounting base (1), and the oil inlet pipe (2) is used to supply oil to the mounting base (1); The component to be lubricated (3) is connected to the mounting base (1), and the component to be lubricated (3) is correspondingly arranged with the mounting cavity (11) so that the oil in the mounting base (1) flows through the component to be lubricated (3) and accumulates in the mounting cavity (11); Oil return line (4) is connected to the mounting cavity (11) and is used to discharge the oil in the mounting cavity (11); Cooling pipe (5), in which cooling fluid for absorbing heat flows, and the cooling pipe (5) is connected to the return oil pipe (4) so ​​that the cooling fluid in the cooling pipe (5) drives the oil in the return oil pipe (4) to flow. The oil tank (7) is used to store oil. One end of the oil inlet pipe (2) is connected to the mounting base (1), and the other end of the oil inlet pipe (2) is connected to the oil tank (7). One end of the oil return pipe (4) is connected to the mounting base (1), and the other end of the oil return pipe (4) is connected to the oil tank (7). The oil supply structure also includes an energy storage tank (8). The energy storage tank (8) has a first receiving cavity (81) for accommodating the oil and a second receiving cavity (82) for accommodating the cooling fluid. The oil inlet pipe (2) passes through the first receiving cavity (81). One end of the cooling pipe (5) is connected to the second receiving cavity (82), and the other end of the cooling pipe (5) is connected to the oil return pipe (4). A regulating valve (85) is provided on the oil inlet pipe (2) and is used to regulate the flow rate into the first receiving cavity (81).

2. The oil supply structure according to claim 1, characterized in that, The oil supply structure also includes an ejector (6), which is installed on the return oil line (4), and the cooling line (5) is connected to the ejector (6).

3. The oil supply structure according to claim 2, characterized in that, The energy storage tank (8) is equipped with: A partition (83) is provided, with the first receiving cavity (81) located on one side of the partition (83) and the second receiving cavity (82) located on the other side of the partition (83). The partition (83) is movably provided so that the volume of the first receiving cavity (81) and the second receiving cavity (82) can be adjusted by moving the partition (83).

4. The oil supply structure according to claim 3, characterized in that, The energy storage tank (8) is connected to the oil tank (7). The first receiving cavity (81) is located on the side of the second receiving cavity (82) close to the oil tank (7). An elastic element (84) is provided in the first receiving cavity (81). One end of the elastic element (84) is connected to the oil tank (7), and the other end of the elastic element (84) is connected to the partition (83).

5. The oil supply structure according to claim 4, characterized in that, The oil supply structure also includes a liquid level sensor (86), which is disposed in the mounting cavity (11) and is signal-connected to the regulating valve (85).

6. A compressor, comprising an oil supply structure, characterized in that, The oil supply structure is the oil supply structure according to any one of claims 1 to 5.

7. A control method applicable to the oil supply structure according to any one of claims 1 to 5, characterized in that, The control method includes: Measure the height h of the oil level in the mounting cavity; Compare h with the threshold H; If h < H, then reduce the flow rate of the cooling fluid in the cooling pipe (5); If h≥H, then increase the flow rate of the cooling fluid in the cooling pipe (5).

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