Oil starvation self-protection and alarm device of compressor

Abstract

Relates to the field of compressors, and discloses an oil starvation self-protection and alarm device of a compressor, which comprises a detection piece, an alarm device and a controller, the oil level detection device is arranged in the detection piece, electrically connected with an alarm on the outer side and used for detecting the oil level in the detection piece; the oil level detection device comprises a third binding post arranged at the top of the detection piece; the supporting device is arranged in the detection piece; the floating ball is arranged in the detection piece and located between the supporting devices; according to the utility model, when refrigeration oil in the compressor shell is sufficient, the compressor operates normally; when refrigeration oil in the compressor shell is lacked, the compressor stops running, the alarm indicating lamp is turned on, and an alarm is given out. And when the oil in the compressor shell returns to normal, the self-protection and alarm device is reset.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to an oil shortage self-protection and alarm device for a compressor. Background Art

[0002] The compressor is the heart of the refrigeration system, and its quality directly determines the quality of a refrigeration equipment. The refrigeration oil plays a lubricating role in the high-speed operation of the compressor to reduce the friction and wear of the compressor and extend the service life of the compressor. Therefore, the refrigeration oil is an indispensable part of the compressor. During the circulation of the refrigeration system, the refrigerant will carry some refrigeration oil. Therefore, the general refrigeration system will have an oil return design to ensure that the refrigeration oil taken away can be returned to the compressor for recycling to avoid damage to the compressor due to lack of oil.

[0003] The existing equipment has the following disadvantages: when there is a problem with the oil return device or the oil return efficiency is low, it cannot be observed from the outside. If the compressor continues to run at this time, it will be damaged. The existing compressors do not have such a monitoring or protection mechanism, which can easily cause damage to the compressor and affect the service life of the compressor.

[0004] Therefore, the present application proposes a compressor oil shortage self-protection and alarm device to solve the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide a compressor oil shortage self-protection and alarm device to solve the above-mentioned problem that when there is a problem with the oil return device or the oil return efficiency is low, it cannot be observed from the outside and the compressor will be damaged if it continues to run.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a compressor oil shortage self-protection and alarm device, comprising:

[0007] A detection member, arranged on a compressor housing;

[0008] An oil level detection device, which is arranged inside the detection member and is electrically connected to the alarm device outside, and is used to detect the oil level inside the detection member;

[0009] The oil level detection device comprises:

[0010] A third terminal, arranged on the top of the detection member;

[0011] A supporting device, arranged inside the detection member;

[0012] A floating ball, arranged inside the detection member and between the supporting devices;

[0013] The second terminal is arranged at the lower end of the supporting device.

[0014] Wherein, the detection member comprises a detection tube, and at least one longitudinal through groove is formed in the circumference of the detection tube. A stator is fixed to the upper end of the detection tube, and the upper end of the stator is fixedly connected to the third terminal.

[0015] Wherein, the supporting device includes a first elastic member fixed at the lower end of the stator and a second elastic member fixed on the inner bottom wall of the detection tube, the float is located between the first elastic member and the second elastic member and abuts against the first elastic member and the second elastic member, and the second elastic member is connected to the second terminal.

[0016] Wherein, the float is provided with a first terminal connected thereto, and the first terminal, the second terminal and the third terminal are electrically connected to the alarm.

[0017] Wherein, the detection component also includes a detection tube arranged on the outside of the compressor casing, a first pipeline arranged on the upper part of the outside of the compressor casing and connected to the detection tube, and a second pipeline arranged on the lower part of the outside of the compressor casing and connected to the detection tube, the detection tube is connected to the compressor casing, a third terminal is fixed to the upper end of the detection tube, a second terminal is fixed to the lower end of the detection tube, a first elastic component is fixed to the inner top of the detection tube, and a second elastic component is fixed to the inner bottom of the detection tube.

[0018] Wherein, a first terminal is fixed in the middle of the detection tube, and the first terminal is electrically connected to the float through a wire.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] According to the utility model, when the refrigeration oil level is higher than a preset safety position, the float floats on the surface of the refrigeration oil and squeezes the first elastic member and separates from the second elastic member; the first passage is open and the second passage is disconnected, at which time the compressor operates normally and the alarm light is off; when the refrigeration oil is lower than the preset safety position, the float floats on the surface of the refrigeration oil and separates from the first elastic member, squeezing the second elastic member, the first passage is disconnected and the second passage is open, at which time the compressor stops running and the alarm light is on. Through the above control, it can be achieved that when the refrigeration oil inside the compressor casing is sufficient, the compressor operates normally; when the refrigeration oil inside the compressor casing is insufficient, the compressor stops running, the alarm indicator light is on, and an alarm is sounded; when the oil inside the compressor casing returns to normal, the self-protection and alarm devices are reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main structure in one embodiment of the utility model;

[0022] Figure 2This is a schematic diagram of the structure inside the detection tube in one embodiment of the utility model;

[0023] Figure 3 This is a schematic structural diagram of a cross-section of a detection tube in an embodiment of the utility model;

[0024] Figure 4 This is a structural schematic diagram of an embodiment of the utility model when the oil level moves upward;

[0025] Figure 5 This is a schematic diagram of the structure in which the detection tube is fixed on the outside of the compressor housing in one embodiment of the utility model;

[0026] Figure 6 It is a schematic structural diagram of a cross section when the detection tube is fixed on the outside of the compressor housing in one embodiment of the utility model;

[0027] Figure 7 It is a schematic structural diagram of a cross-section of a detection tube in which a detection tube is fixed to the outside of a compressor housing in one embodiment of the utility model;

[0028] Figure 8 This is a schematic diagram of the structure inside the detection tube in one embodiment of the utility model;

[0029] Fig. 9 It is a structural schematic diagram of the working principle diagram of the oil level self-protection and alarm device in one embodiment of the utility model.

[0030] In the figure: 1, compressor casing; 2, detection tube; 21, first pipeline; 22, second pipeline; 3, oil level detection device; 31, stator; 32, first elastic member; 33, float; 34, first terminal; 341, wire; 35, second elastic member; 36, second terminal; 37, third terminal. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Embodiment 1

[0033] See also Figure 1-9 The utility model provides a technical solution: a compressor oil shortage self-protection and alarm device, comprising:

[0034] A detection member is arranged on the compressor housing 1;

[0035] The oil level detection device 3 is arranged inside the detection member and is electrically connected to the alarm device outside, and is used to detect the oil level inside the detection member;

[0036] The oil level detection device 3 comprises:

[0037] A third terminal 37, arranged on the top of the detection member;

[0038] A supporting device, arranged inside the detection part;

[0039] A floating ball 33 is arranged inside the detection member and between the supporting devices;

[0040] The second terminal 36 is arranged at the lower end of the supporting device.

[0041] It should be noted that, when working, the oil level detection device 3 is arranged inside the compressor casing 1. When the compressor is short of oil, it can disconnect the power supply of the compressor to stop the compressor from running to avoid the compressor from being worn and damaged due to lack of oil, and send out an alarm to facilitate manual investigation of the cause of the fault. When the oil level of the compressor returns to normal, the alarm will be automatically lifted, and the operation of the compressor will return to normal, which is safer and more reliable.

[0042] In one embodiment, the detection component includes a detection tube 2 , which has at least one longitudinal through groove circumferentially formed therein, a stator 31 fixed to the upper end of the detection tube 2 , and the upper end of the stator 31 is fixedly connected to the third terminal 37 .

[0043] This design, see Figure 1-4 The stator 31 is fixed above the detection tube 2 and cannot move. The supporting device is arranged inside the detection tube 2. The detection tube 2 is composed of two arc-shaped columns with a gap in the middle and they are not connected to ensure that the refrigerant oil inside the guide groove and the compressor casing can flow freely, thereby ensuring that the refrigerant oil level is at the same height. The float 33 is in the middle of the detection tube 2 and in the middle of the supporting device. It is not fixedly connected. The float 33 floats on the surface of the refrigerant oil and floats up and down with the height of the refrigerant oil. The detection tube 2 can limit the float 33 from floating left and right, so that it can only float up and down inside the guide groove of the detection tube 2, ensuring that it can contact with the supporting device to avoid deviation. At the same time, it also prevents the float 33 from hitting the high-speed moving parts inside the compressor and damaging the compressor.

[0044] In one embodiment, the supporting device includes a first elastic member 32 fixed at the lower end of the stator 31 and a second elastic member 35 fixed on the inner bottom wall of the detection tube 2. The float 33 is located between the first elastic member 32 and the second elastic member 35 and abuts against the first elastic member 32 and the second elastic member 35. The second elastic member 35 is connected to the second terminal 36.

[0045] With this design, the float 33 is located between the first elastic member 32 and the second elastic member 35, and the float 33 will not contact the first elastic member 32 and the second elastic member 35 at the same time, and floats up and down with the oil level inside the detection tube 2. When the refrigerant oil level is higher than the preset safety position, the float 33 floats on the surface of the refrigerant oil and squeezes the first elastic member 32 and separates from the second elastic member 35. When the refrigerant oil level is lower than the preset safety position, the float 33 floats on the surface of the refrigerant oil and separates from the first elastic member 32, squeezing the second elastic member 35.

[0046] In one embodiment, the float 33 is provided with a first terminal 34 , and the first terminal 34 , the second terminal 36 and the third terminal 37 are electrically connected to the alarm.

[0047] In this design, the power supply, the compressor, the self-protection device and the alarm device form a first passage, wherein the self-protection device and the alarm device are connected to the first passage through the third terminal 37 and the first terminal 34. The power supply, the alarm light, the self-protection device and the alarm device form a second passage, wherein the self-protection and alarm devices are connected to the second passage through the first terminal 34 and the second terminal 36. The first passage and the second passage are in a parallel relationship. When the refrigeration oil height is higher than the preset safety position, the float 33 floats on the surface of the refrigeration oil and squeezes the first elastic member 32 and separates from the second elastic member 35; the first passage is open and the second passage is closed, at this time the compressor operates normally and the alarm light is not on; when the refrigeration oil is lower than the preset safety position, the float 33 floats on the surface of the refrigeration oil and separates from the first elastic member 32, squeezes the second elastic member 35, the first passage is closed and the second passage is open, at this time the compressor stops running and the alarm light is on. Through the above control, it can be achieved that when the refrigeration oil inside the compressor housing is sufficient, the compressor operates normally; when the refrigeration oil inside the compressor housing is insufficient, the compressor stops running, the alarm indicator light is on, and an alarm is sounded; when the oil inside the compressor housing returns to normal, the self-protection and alarm device resets.

[0048] Embodiment 2

[0049] In one embodiment, the detection component also includes a detection tube 2 arranged on the outside of the compressor casing 1, a first pipeline 21 arranged on the upper part of the outside of the compressor casing 1 and connected to the detection tube 2, and a second pipeline 22 arranged on the lower part of the outside of the compressor casing 1 and connected to the detection tube 2. The detection tube 2 is connected to the compressor casing 1, a third terminal 37 is fixed to the upper end of the detection tube 2, a second terminal 36 is fixed to the lower end of the detection tube 2, a first elastic member 32 is fixed to the inner top of the detection tube 2, and a second elastic member 35 is fixed to the inner bottom of the detection tube 2.

[0050] In one embodiment, a first terminal 34 is fixed to the middle of the detection tube 2 , and the first terminal 34 is electrically connected to the float 33 via a wire 341 .

[0051] This design, see Figure 5-9 , wherein the first pipeline 21 and the second pipeline 22 connect the self-protection device and the alarm device to the inside of the compressor casing 1, balance the pressure difference, and ensure that the refrigerant oil level height inside the detection tube 2 is the same as the refrigerant oil level height inside the compressor casing 1. The upper and lower parts of a hollow cylinder of the detection tube 2 are sealed, and the third terminal 37 is connected to the first elastic member 32, and the first elastic member 32 is fixed to the upper inner part of the detection tube 2. The second terminal 36 is connected to the second elastic member 35, and the second elastic member 35 is fixed to the lower inner part of the detection tube 2. The first terminal 34 is connected to the float 33 through a movable wire 341, wherein the third terminal 37 and the first terminal 34 are used to access the above-mentioned first passage, and the first terminal 34 and the second terminal 36 are used to access the above-mentioned second passage, and the relevant working principles are the same as above.

[0052] In addition, if there are descriptions involving "first", "second", etc. in the embodiments, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying the importance of the relative description or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

Claims

1. A compressor oil shortage self-protection and alarm device, characterized in that: include: A detection member is arranged on the compressor housing (1); An oil level detection device (3), arranged inside the detection member and electrically connected to an alarm device outside, for detecting the oil level inside the detection member; The oil level detection device (3) comprises: A third terminal (37) is arranged on the top of the detection member; A supporting device, arranged inside the detection member; A floating ball (33) is arranged inside the detection member and between the supporting devices; The second terminal (36) is arranged at the lower end of the supporting device.

2. The oil shortage self-protection and alarm device for a compressor according to claim 1, characterized in that: The detection member comprises a detection tube (2), the detection tube (2) being provided with at least one longitudinal through slot in the circumferential direction, a stator (31) being fixed to the upper end of the detection tube (2), and the upper end of the stator (31) being fixedly connected to the third terminal (37).

3. The oil shortage self-protection and alarm device for a compressor according to claim 2, characterized in that: The supporting device comprises a first elastic member (32) fixed to the lower end of the stator (31) and a second elastic member (35) fixed to the inner bottom wall of the detection tube (2); the float (33) is located between the first elastic member (32) and the second elastic member (35) and is in contact with the first elastic member (32) and the second elastic member (35); the second elastic member (35) is connected to the second terminal (36).

4. The oil shortage self-protection and alarm device for a compressor according to claim 3, characterized in that: The float (33) is provided with a first terminal (34) connected thereto, and the first terminal (34), the second terminal (36) and the third terminal (37) are electrically connected to the alarm.

5. The oil shortage self-protection and alarm device for a compressor according to claim 1, characterized in that: The detection component further comprises a detection tube (2) arranged on the outside of the compressor housing (1), a first pipeline (21) arranged on the upper part of the outside of the compressor housing (1) and connected to the detection tube (2), and a second pipeline (22) arranged on the lower part of the outside of the compressor housing (1) and connected to the detection tube (2); the detection tube (2) is connected to the compressor housing (1); a third terminal (37) is fixed to the upper end of the detection tube (2); a second terminal (36) is fixed to the lower end of the detection tube (2); a first elastic member (32) is fixed to the inner top of the detection tube (2); and a second elastic member (35) is fixed to the inner bottom of the detection tube (2).

6. The oil shortage self-protection and alarm device for a compressor according to claim 5, characterized in that: A first terminal (34) is fixed in the middle of the detection tube (2), and the first terminal (34) is electrically connected to the float (33) via a wire (341).

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