Compressor with oil level detection device and heating and ventilation equipment
By installing a tank on the outside of the compressor and utilizing the principle of communicating vessels, the difficulties and inaccuracies in the installation of oil level detection inside the compressor were solved, achieving low-cost and accurate oil level detection.
Patent Information
- Application Number
- CN202520089866.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-14
AI Technical Summary
Existing compressors have difficulty accurately detecting the refrigerant oil level. The internal sensors are difficult to install and costly, and fluctuations in the oil level lead to inaccurate detection.
An oil level sensor is installed in a tank outside the compressor housing. The principle of communicating vessels is used to make the oil levels inside and outside the tank equal. The capacitance value is measured by the oil level sensor inside the tank, and the result is compared with the value measured by the control processor to determine the oil level.
This invention achieves easy installation and low cost of oil level sensor, and can accurately detect the oil level of refrigeration oil in compressor, avoiding inaccurate detection caused by internal oil level fluctuations.
Smart Images
Figure CN223676484U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a compressor technical field especially a kind of compressor with oil level detection device and heating and ventilation equipment. BACKGROUND
[0002] The compressor has a compression assembly that sucks in and compresses refrigerant, and an electronic assembly disposed at an upper portion of the compressor housing and acting on the compression assembly. The compression assembly and the electronic assembly share a rotating shaft, which rotates based on power generated by the electronic assembly, and a piston on the rotating shaft performs compression work on the internal cavity of the compression assembly. In this case, it is necessary to supply refrigeration oil to the bearings, crankshafts and other components of the compression assembly. The refrigeration oil is generally stored in the lower portion of the compressor housing, which mainly performs lubrication and cooling of the electronic assembly, so it is crucial to determine whether the oil level of the refrigeration oil in the compressor housing is within the standard range.
[0003] However, it is not easy to accurately detect the oil level of the refrigeration oil inside the compressor, which also leads to the fact that most compressors do not have related oil level detection devices. Some other compressors have an oil level sensor installed inside to detect the oil level of the refrigeration oil inside the compressor. However, installing the sensor inside the compressor housing is difficult due to the small internal space of the compressor housing, and the need to install core components such as the electronic assembly and the compression assembly, which can lead to high costs and other problems. In addition, the sensor may have difficulty detecting and detecting inaccurately due to the large fluctuation of the oil level inside the compressor during operation. SUMMARY
[0004] Therefore, the utility model aims to overcome the shortcomings of the prior art, and provides a compressor with an oil level detection device and a heating and ventilation equipment, which is easy to install, low in cost, and can accurately detect the oil level of the refrigeration oil in the compressor.
[0005] To achieve the above-mentioned purpose, the utility model embodiment first aspect provides a kind of compressor with oil level detection device, including compressor housing, oil level detection device, the lower portion of the inside of the compressor housing is used to store refrigeration oil, and the oil level detection device includes tank body, oil level sensor;
[0006] The tank body is arranged on the outer side wall of the compressor housing, a lower end of the tank body is communicated with an inside lower portion of the compressor housing through a first connecting pipe, and the first connecting pipe is used for flowing refrigerant oil in the inside of the compressor housing to the inside lower portion of the tank body, so that the oil level of the refrigerant oil in the inside of the compressor housing is equal to the oil level of the refrigerant oil in the inside of the tank body; an upper end of the tank body is communicated with the inside of the compressor housing through a second connecting pipe, and the height of the second connecting pipe in the axial direction is higher than the oil level when the compressor is running.
[0007] The oil level sensor is arranged above the inside of the tank body, and is used for measuring a capacitance value which changes according to the oil level of the refrigerant oil in the inside of the tank body.
[0008] Therefore, according to the compressor with the oil level detection device, the tank body with the oil level sensor is arranged on the outer side wall of the compressor housing, and the compressor housing and the tank body are communicated through the first connecting pipe, so that the oil level of the refrigerant oil in the inside of the tank body is equal to the oil level of the refrigerant oil in the inside of the compressor housing by the principle of communicating vessels, that is, the oil surface height of the tank body and the compressor housing is the same, and the oil surface fluctuation of the refrigerant oil in the inside of the tank body is relatively small because the refrigerant oil in the inside of the tank body is not stirred by the compression component, so that the capacitance value measured by the oil level sensor in the tank body is relatively more accurate, that is, the oil level of the refrigerant oil in the compressor can be accurately detected by the principle of communicating vessels, the oil level sensor is arranged outside the tank body, the installation of the oil level sensor is facilitated, and the phenomenon that the oil level is not accurately detected due to the large oil surface fluctuation in the inside of the compressor housing is avoided, so that the oil level of the refrigerant oil in the compressor can be accurately detected.
[0009] As an embodiment, a control processor is further included, the control processor is electrically connected with the oil level sensor, the control processor is used for receiving the capacitance value measured by the oil level sensor and comparing with a reference value stored in the control processor, and determining the oil level of the refrigerant oil in the inside of the tank body according to the comparison result.
[0010] As an implementation form, the oil level sensor includes a first detection electrode and a second detection electrode arranged at intervals along an axial direction of the tank body, lower ends of the first detection electrode and the second detection electrode are inserted into refrigerant oil in the inside of the tank body, a height of a portion of the first detection electrode and the second detection electrode inserted into the refrigerant oil in the inside of the tank body is L1, a height of an oil level of the refrigerant oil in the inside of the tank body to a top of the first detection electrode and the second detection electrode is L2, a dielectric constant of the refrigerant oil in the inside of the tank body is E1, a dielectric constant of a non-refrigerant oil immersion portion in the inside of the tank body is E0, a spacing between the first detection electrode and the second detection electrode is d, a width of the first detection electrode and the second detection electrode is b, and a height of the first detection electrode and the second detection electrode is L; a measured capacitance value of the oil level sensor is C, and the following formula is satisfied: C=E0*b*L2 / d+E1*b*L1 / d=E0*b*L / d+(E1-E0)*b*L1 / d=A+B*L1.
[0011] Wherein, A=E0*b*L / d, B=(E1-E0)*b / d, A and B are fixed values, and L1 is a variable value.
[0012] Therefore, the compressor with the oil level detection device according to the embodiment of the present application, through the ingenious arrangement of the tank body and the oil level sensor, the oil level sensor measures the capacitance value C=A+B*L1 in the inside of the tank body, according to the formula, when the height L1 of the oil surface of the refrigerant oil in the inside of the tank body to the top of the two detection electrodes changes, the capacitance value measured by the oil level sensor also changes, that is, the capacitance value C and the height L1 are linearly related, in this way, the height L1 of the oil surface of the refrigerant oil in the inside of the tank body to the top of the two detection electrodes can be obtained through the measured capacitance value C, so that the oil level of the refrigerant oil in the compressor can be accurately detected by the embodiment of the present application.
[0013] As an implementation form, a wiring terminal is arranged outside the top of the tank body, and the wiring terminal is electrically connected with the oil level sensor.
[0014] As an implementation form, the wiring terminal partially extends into the inside of the tank body, and the portion of the wiring terminal extending into the inside of the tank body is in interference fit with the oil level sensor and forms electrical connection.
[0015] As an implementation form, a waterproof cover is arranged on the wiring terminal.
[0016] As an implementation form, the refrigerant oil is at least one of POE oil and PVE oil, or a mixture containing the same.
[0017] As an implementation form, the first connecting pipe is an L-shaped pipe, one end of the first connecting pipe is connected with the bottom of the tank body, and the other end of the first connecting pipe is connected with the side wall of the compressor shell.
[0018] As an implementation form, the second connecting pipe is a straight pipe structure with two open ends.
[0019] The utility model embodiment second aspect provides a kind of heating equipment, it includes the compressor with oil level detection device of any one embodiment above.According to the heating equipment of the utility model embodiment, its oil level detection device is easy to install, low in cost, and can accurately detect the oil level of refrigerating machine oil in compressor.
[0020] For better understanding and implementation, the utility model is described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is one of the structural schematic diagram of the compressor with oil level detection device of the utility model embodiment;
[0022] Figure 2 It is the second structural schematic diagram of the compressor with oil level detection device of the utility model embodiment;
[0023] Figure 3 It is the internal section view schematic diagram of the compressor with oil level detection device of the utility model embodiment;
[0024] Figure 4 It is Figure 3 It is the enlarged schematic view of A part shown in figure;
[0025] Figure 5 It is one of the structural schematic diagram of the oil level sensor of the compressor with oil level detection device of the utility model embodiment;
[0026] Figure 6 It is the second structural schematic diagram of the oil level sensor of the compressor with oil level detection device of the utility model embodiment;
[0027] Figure 7 It is the technical principle diagram of the oil level sensor of the compressor with oil level detection device of the utility model embodiment.
[0028] Mark explanation: 10, compressor shell;11, first connecting pipe;12, second connecting pipe;20, tank body;21, wiring terminal;22, waterproof cover;30, oil level sensor;31, first detection electrode;32, second detection electrode. DETAILED DESCRIPTION
[0029] To further illustrate the embodiments, the utility model provides has the drawing. These drawings are part of the utility model disclosure, which is mainly used to illustrate the embodiments, and can be combined with the related description of the specification to explain the operation principle of the embodiments. With reference to these contents, those skilled in the art should understand other possible implementations and the advantages of the utility model.
[0030] In the related art, the compressor has a compression assembly that sucks and compresses refrigerant and an electronic assembly provided at an upper portion of a compressor housing and acting on the compression assembly. Among them, the compression assembly and the electronic assembly share a rotating shaft, the rotating shaft rotates based on the power generated by the electronic assembly, and then the piston on the rotating shaft performs the compression operation of the refrigerant in the internal cavity of the compression assembly. In this case, it is necessary to supply refrigeration oil to the bearing, crankshaft and other components of the compression assembly. The refrigeration oil is generally stored in the lower part of the compressor housing, which mainly performs the lubrication function and cools the electronic assembly, therefore, it is crucial whether the oil amount of the refrigeration oil in the compressor housing fluctuates within the standard range. However, it is not easy to accurately detect the oil level of the refrigeration oil in the compressor, which also leads to the fact that most compressors do not install relevant oil level detection devices. In addition, some compressors are provided with an oil level sensor inside to detect the oil level of the refrigeration oil in the compressor. However, the sensor is installed inside the compressor housing, and due to the small internal space of the compressor housing, the core components such as the electronic assembly and the compression assembly need to be installed, which easily leads to the problems of difficult sensor installation, high cost and the like; and during the operation of the compressor, due to the large fluctuation of the oil surface inside, the sensor is prone to the problems of difficult detection, inaccurate detection and the like.
[0031] Therefore, the utility model embodiment provides a kind of compressor and heating equipment with oil level detection device, according to the compressor and heating equipment with oil level detection device of the utility model embodiment, its oil level detection device is easy to install, low in cost, and the oil level of refrigeration oil in compressor can be accurately detected simultaneously.
[0032] Please refer to Figures 1 to 7The utility model discloses a first aspect provides a kind of compressor with oil level detection device, including compressor shell 10, oil level detection device, the inside lower portion of the compressor shell 10 is used to store refrigeration oil, the oil level detection device includes tank 20, oil level sensor 30;The tank 20 is arranged on the outer lateral wall of the compressor shell 10, and the lower end of the tank 20 is connected with the inside lower portion of the compressor shell 10 by first connecting pipe 11, and the first connecting pipe 11 is used to make the refrigeration oil in the inside of the compressor shell 10 flow to the inside lower portion of the tank 20, so that the oil level of the refrigeration oil in the inside of the compressor shell 10 is equal to the oil level of the refrigeration oil in the inside of the tank 20;The upper end of the tank 20 is connected with the inside of the compressor shell 10 by second connecting pipe 12, and the height of the second connecting pipe 12 in axial direction is higher than the oil level when the compressor operates;The oil level sensor 30 is arranged in the inside upper portion of the tank 20, and the oil level sensor 30 is used to measure the capacitance value changed according to the oil level of the refrigeration oil in the inside of the tank 20.
[0033] In the utility model embodiment, the oil level detection device further includes a control processor, the control processor is electrically connected with the oil level sensor 30, and the control processor is used to receive the capacitance value measured from the oil level sensor 30 and compare the capacitance value with a reference value stored in the control processor, and determine the oil level of the refrigeration oil in the inside of the tank 20 according to the comparison result.
[0034] Therefore, according to the compressor with the oil level detection device in the utility model embodiment, the tank 20 in which the oil level sensor 30 is installed is externally hung on the outer lateral wall of the compressor shell 10, and the compressor shell 10 and the tank 20 are connected by the first connecting pipe 11, so that the oil level of the refrigeration oil in the inside of the tank 20 is equal to the oil level of the refrigeration oil in the inside of the compressor shell 10 by the principle of communicating vessels, that is, the oil surface height of the tank 20 and the compressor shell 10 is the same, and the oil surface fluctuation of the refrigeration oil in the inside of the tank 20 is relatively small because the refrigeration oil in the inside of the tank 20 is not stirred by the compression component, so that the capacitance value changed according to the oil level of the refrigeration oil in the inside of the tank 20 measured by the oil level sensor 30 built in the tank 20 is relatively more accurate, that is, the tank 20 is externally placed in the tank 20 by the principle of communicating vessels in the utility model embodiment, so that the oil level sensor 30 can be easily installed, and the phenomenon that the oil level is not accurately detected due to the large oil surface fluctuation in the inside of the compressor shell 10 can be avoided, so that the oil level of the refrigeration oil in the compressor can be accurately detected in the utility model embodiment.
[0035] Specifically, as Figure 7As shown, in the embodiment of the utility model, the oil level sensor 30 includes first detection electrode 31, second detection electrode 32 that are arranged along the axial direction of the tank body 20, the lower end of first detection electrode 31, second detection electrode 32 is inserted into the refrigeration oil of the inside of tank body 20, and the height of the part of first detection electrode 31, second detection electrode 32 inserted into the refrigeration oil of the inside of tank body 20 is L1, the height of the oil level of the refrigeration oil of the inside of tank body 20 to the top of first detection electrode 31, second detection electrode 32 is L2, the dielectric constant of the refrigeration oil of the inside of tank body 20 is E1, the dielectric constant of the non-refrigeration oil soaking part of the inside of tank body 20 is E0, the spacing between first detection electrode 31 and second detection electrode 32 is d, the width of first detection electrode 31 and second detection electrode 32 is b, and the height of first detection electrode 31 and second detection electrode 32 is L;The capacitance value measured by the oil level sensor 30 is C, and satisfies: C=E0*b*L2 / d+E1*b*L1 / d=E0*b*L / d+(E1-E0)*b*L1 / d=A+B*L1;
[0036] Wherein, A=E0*b*L / d, B=(E1-E0)*b / d, A, B are fixed values, and L1 is a variable value.
[0037] Therefore, according to the compressor with the oil level detection device in the embodiment of the utility model, the tank body 20 and the oil level sensor 30 are cleverly arranged, so that the capacitance value C=A+B*L1 measured by the oil level sensor 30 in the inside of the tank body 20, as can be seen from the formula, when the height L1 of the refrigeration oil surface in the inside of the tank body 20 to the top of the two detection electrodes changes, the capacitance value measured by the oil level sensor 30 will also change, that is, the linear relationship between the capacitance value C and L1, in this way, the height L1 of the part of first detection electrode 31, second detection electrode 32 inserted into the refrigeration oil of the inside of tank body 20, that is, the oil level height of the refrigeration oil can be obtained by the measured capacitance value C, so that the embodiment of the utility model can accurately detect the oil level of the refrigeration oil in the compressor.
[0038] Wherein, the model of the oil level sensor 30 can be the oil level sensor 30 with model 23B1 produced by Shogosha Manufacturing Co., Ltd., or other models of oil level sensor 30. In addition, the refrigeration oil is at least one of POE oil and PVE oil, or a mixture containing them.
[0039] Optionally, in some embodiments of the utility model, the top of the tank 20 is externally provided with a terminal 21, the terminal 21 is electrically connected with the oil level sensor 30, and a waterproof cover 22 is arranged on the terminal 21. Wherein, the terminal 21 partially extends into the tank 20, and the part of the terminal 21 extending into the tank 20 is in interference fit with the oil level sensor 30 and forms electrical connection. It can be understood that in these embodiments, the top of the oil level sensor 30 is provided with two metal clamps, the two metal clamps are connected with the first detection electrode 31 and the second detection electrode 32 respectively, the top of the tank 20 is provided with two terminals 21 respectively, and the two terminals 21 are inserted into the two metal clamps of the oil level sensor 30 respectively, so that the terminal 21 is electrically connected with the oil level sensor 30.
[0040] It is worth connecting that in other embodiments, two metal wire tubes can be respectively led out on the oil level sensor 30, and the two metal wire tubes are extended outside the tank 20, so that the oil level sensor 30 can be electrically connected with the control processor in the outside world through the two metal wire tubes.
[0041] Optionally, in some embodiments of the utility model, the first connecting pipe 11 is an L-shaped pipe, one end of the first connecting pipe 11 is connected with the bottom of the tank 20, and the other end of the first connecting pipe 11 is connected with the side wall of the compressor shell 10. The second connecting pipe 12 is a straight pipe structure with two open ends. It can be understood that in these embodiments, the first connecting pipe 11 is used for the circulation of the refrigeration oil between the compressor shell 10 and the tank 20, and the second connecting pipe 12 is used for the circulation between the air inside the compressor shell 10 and the air inside the tank 20, so as to form a communication structure, so that the oil level height of the refrigeration oil inside the two is consistent.
[0042] The utility model discloses a second aspect provides a kind of heating and ventilation equipment, it includes the compressor with oil level detection device of any one embodiment above.According to the heating and ventilation equipment of the utility model embodiment, its oil level detection device is easy to install, low in cost, and can accurately detect the oil level of the refrigeration oil in the compressor.
[0043] In the description of the utility model, it is understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0044] The above-described embodiments only express several embodiments of the utility model, the description is more specific and detailed, but it cannot be understood as limiting the range of the utility model compressor with oil level detection device and heating and ventilation equipment. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model.
Claims
1. A compressor with an oil level detection device, characterized in that: it comprises a compressor housing and an oil level detection device, the inside of the compressor housing is used to store refrigerant oil, and the oil level detection device comprises a tank and an oil level sensor; the tank is arranged on the outer side wall of the compressor housing, the lower end of the tank is connected to the inside of the compressor housing through a first connecting pipe, the first connecting pipe is used for the flow of refrigerant oil in the inside of the compressor housing to the inside of the tank, so that the oil level of the refrigerant oil in the inside of the compressor housing is equal to the oil level of the refrigerant oil in the inside of the tank; the upper end of the tank is connected to the inside of the compressor housing through a second connecting pipe, and the height of the second connecting pipe in the axial direction is higher than the oil level when the compressor is running; the oil level sensor is arranged in the inside of the tank, and the oil level sensor is used to measure the capacitance value which changes with the oil level of the refrigerant oil in the inside of the tank. 2.The compressor with an oil level detection device according to claim 1, characterized in that: it further comprises a control processor, the control processor is electrically connected with the oil level sensor, the control processor is used to receive the capacitance value measured by the oil level sensor and compare it with the reference value stored in the control processor, and determine the oil level of the refrigerant oil in the inside of the tank according to the comparison result. 3.The compressor with an oil level detection device according to claim 1, characterized in that: the oil level sensor comprises a first detection electrode and a second detection electrode which are arranged at intervals in the axial direction of the tank, the lower end of the first detection electrode and the second detection electrode is inserted into the refrigerant oil in the inside of the tank, the height of the part of the first detection electrode and the second detection electrode inserted into the refrigerant oil in the inside of the tank is L1, the height from the oil level of the refrigerant oil in the inside of the tank to the top of the first detection electrode and the second detection electrode is L2, the dielectric constant of the refrigerant oil in the inside of the tank is E1, the dielectric constant of the non-refrigerant oil soaking part in the inside of the tank is E0, the distance between the first detection electrode and the second detection electrode is d, the width of the first detection electrode and the second detection electrode is b, the height of the first detection electrode and the second detection electrode is L; the capacitance value measured by the oil level sensor is C, which satisfies: C=E0*b*L2 / d+E1*b*L1 / d=E0*b*L / d+(E1-E0)*b*L1 / d=A+B*L1; wherein, A=E0*b*L / d, B=(E1-E0)*b / d, A and B are fixed values, and L1 is a variable value. 4.The compressor with an oil level detection device according to claim 1, characterized in that: a terminal is arranged on the top of the tank, and the terminal is electrically connected with the oil level sensor. 5.The compressor with an oil level detection device according to claim 4, characterized in that: The terminal part extends into the interior of the tank, and the part of the terminal extending into the interior of the tank is in interference fit with the oil level sensor and forms an electrical connection.
6. The compressor with oil level detection device according to claim 4, characterized in that: A waterproof cover is arranged on the terminal.
7. The compressor with oil level detection device according to claim 1, characterized in that: The refrigerant oil is one of POE oil and PVE oil.
8. The compressor with oil level detection device according to claim 1, characterized in that: The first connecting pipe is an L-shaped pipe, one end of the first connecting pipe is connected with the bottom of the tank, and the other end of the first connecting pipe is connected with the side wall of the compressor shell.
9. The compressor with oil level detection device according to claim 1, characterized in that: The second connecting pipe is a straight pipe structure with two open ends.
10. A heating and ventilation device, characterized in that: The heating and ventilation device comprises the compressor with oil level detection device according to any one of claims 1 to 9.