CN109139472B

CN109139472B - Liquid level detection anti-interference structure and compressor

Info

Publication number: CN109139472B
Application number: CN201811364774.7A
Authority: CN
Inventors: 刘华; 龙忠铿; 毕雨时; 侯芙蓉; 李日华
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2018-11-16
Filing date: 2018-11-16
Publication date: 2024-04-12
Anticipated expiration: 2038-11-16
Also published as: CN109139472A

Abstract

The present disclosure relates to a liquid level detection tamper structure and a compressor. The liquid level detection immunity structure includes: a first liquid tank (10); a liquid level detection device (60) arranged in the first liquid tank (10) and used for detecting the liquid level in the first liquid tank (10); a second liquid tank (20); and a first baffle (30) arranged between the first liquid tank (10) and the second liquid tank (20), wherein a first through hole (31) for realizing liquid phase communication between the first liquid tank (10) and the second liquid tank (20) is arranged on the first baffle (30). The liquid level fluctuation control method and device can reduce adverse effects of liquid level fluctuation.

Description

Liquid level detection anti-interference structure and compressor

Technical Field

The disclosure relates to the field of detection, and in particular relates to a liquid level detection anti-interference structure and a compressor.

Background

In the protection measures of the screw compressor, oil level protection can be used to prevent the compressor from operating seizing due to lack of lubricating oil. In order to realize oil level protection, the existing mode is to set a liquid level switch at the oil groove of the compressor, and when the oil level of the compressor is lower than a liquid level switch protection line, a protection measure is started to stop the compressor so as to avoid operation blocking.

When the screw compressor operates, a part of high-pressure refrigerant gas discharged by the exhaust pipe passes through the oil filter screen and is discharged from the exhaust port at the upper part, and the other part flows downwards to blow oil in the oil groove of the compressor, so that the oil level fluctuates.

The fluctuation of the oil level can cause the oil level to be seriously inclined, and when the oil level at the position of the liquid level switch is lower than the liquid level switch protection line, the liquid level protection is triggered. However, in practice, the amount of oil in the compressor is sufficient, and the normal oil level is recovered after the air flow passes through the compressor, thereby causing a problem of error protection. In addition, the control logic of the oil level protection generally implements the open circuit protection only when no signal is detected within 1 minute, and when the oil level is in the vicinity of the liquid level switch protection line, the oil level fluctuation generally does not start the open circuit protection, but can cause frequent on-off of the liquid level switch, so that the service life of the liquid level switch is greatly shortened.

Disclosure of Invention

In view of the above, embodiments of the present disclosure provide a liquid level detection anti-interference structure and a compressor, which can reduce adverse effects of liquid level fluctuation.

In one aspect of the present disclosure, there is provided a liquid level detection immunity structure comprising:

a first liquid tank;

the liquid level detection device is arranged in the first liquid tank and is used for detecting the liquid level in the first liquid tank;

a second liquid tank; and

the first baffle is arranged between the first liquid tank and the second liquid tank, and a first through hole for realizing liquid phase communication between the first liquid tank and the second liquid tank is arranged on the first baffle.

In some embodiments, a second through hole is further formed in the first baffle, so as to enable gas phase communication between the first liquid tank and the second liquid tank.

In some embodiments, the second via is located above the first via.

In some embodiments, the second through holes comprise a plurality of through holes or at least one through slot distributed over the first baffle.

In other aspects of the present disclosure, there is provided a compressor including:

a compressor body; and

the liquid level detection anti-interference structure;

the first liquid groove and the second liquid groove are respectively a first lubricating oil groove and a second lubricating oil groove which are arranged at the bottom of the compressor body and are adjacent, and the capacity of the first lubricating oil groove is smaller than that of the second lubricating oil groove.

In some embodiments, the compressor further comprises:

and the second baffle is arranged above the second lubricating oil groove and used for blocking air flow from above the second lubricating oil groove to directly blow the inside of the second lubricating oil groove.

In some embodiments, the compressor body includes an oil content barrel, an oil content filter screen, and an exhaust end bearing seat, the second lubrication groove is located below the exhaust end bearing seat of the compressor body, the first lubrication groove is located lateral to the second lubrication groove, and the second baffle is disposed at a side of the oil content filter screen lower end away from the oil content barrel and locally separates the exhaust end bearing seat from the second lubrication groove.

In some embodiments, an oil filter is also disposed within the second lubrication sump, and the second baffle is located above the oil filter.

In some embodiments, the first through holes comprise 3 to 5 through holes with a pore size of 6 to 8 mm.

In some embodiments, the first baffle is further provided with a second through hole, so as to realize gas phase communication between the first liquid tank and the second liquid tank, and the second through hole comprises 4-6 through holes with the aperture of 4-6 mm or through grooves with the length of 35-40 mm and the width of 4-6 mm.

Therefore, according to the embodiment of the disclosure, the first baffle is arranged between the first liquid tank and the second liquid tank, and the first through hole for communicating the liquid in the first liquid tank and the liquid in the second liquid tank is arranged on the first baffle, so that the first baffle can isolate the liquid level fluctuation in the first liquid tank and the liquid level fluctuation in the second liquid tank, and the first liquid tank and the second liquid tank are communicated through the first through hole, so that the liquid level detection device can detect the liquid level of the second liquid tank and reduce the adverse effect of the liquid level fluctuation.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

The disclosure may be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic structural view of some embodiments of a compressor according to the present disclosure;

FIGS. 2 (a) and 2 (b) are schematic diagrams of two implementations of a first baffle in some embodiments of a liquid level detection immunity structure according to the present disclosure, respectively;

FIG. 3 is a schematic structural view of another perspective of some embodiments of a compressor according to the present disclosure;

fig. 4 is a schematic structural view of a second baffle in some embodiments of a liquid level detection immunity structure according to the present disclosure.

It should be understood that the dimensions of the various elements shown in the figures are not drawn to actual scale. Further, the same or similar reference numerals denote the same or similar members.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative, and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only, and not limiting unless otherwise specifically stated.

The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

In this disclosure, when a particular device is described as being located between a first device and a second device, there may or may not be an intervening device between the particular device and either the first device or the second device. When it is described that a particular device is connected to other devices, the particular device may be directly connected to the other devices without intervening devices, or may be directly connected to the other devices without intervening devices.

All terms (including technical or scientific terms) used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

As shown in fig. 1, is a schematic structural view of some embodiments of a compressor according to the present disclosure. In conjunction with fig. 2 (a), 2 (b) and 3, in some embodiments, the compressor includes a compressor body and a liquid level detection tamper structure. The liquid level detection immunity structure includes: the first liquid tank 10, the second liquid tank 20, the liquid level detection device 60, and the first baffle 30. For the present compressor embodiment, the first liquid tank 10 and the second liquid tank 20 are respectively a first oil tank and a second oil tank which are disposed at the bottom of the compressor body and are adjacent, and the capacity of the first oil tank is smaller than that of the second oil tank.

A liquid level detection device 60 is provided in the first liquid tank 10 for detecting the liquid level in the first liquid tank 10. The liquid level detection device 60 preferably employs a simple and reliable float-type liquid level switch. In other embodiments, the liquid level detecting device 60 may also employ capacitive, electronic, photoelectric, ultrasonic, or other liquid level switches according to different usage scenarios.

The first baffle 30 is disposed between the first liquid tank 10 and the second liquid tank 20, and a first through hole 31 for communicating liquid between the first liquid tank 10 and the second liquid tank 20 is formed in the first baffle 30.

Since the first liquid tank 10 and the second liquid tank 20 are communicated with each other through the first through hole 31, the liquid levels of the first liquid tank 10 and the second liquid tank 20 are the same when the air pressures of the two tanks are the same according to the principle of a communicating vessel. The liquid level of the second lubrication groove can thus be indirectly detected by detecting the liquid level of the first liquid groove 10 by the liquid level detection means 60. For the compressor embodiment, the liquid level information of the second, larger capacity lubrication sump may be obtained by detection of the liquid level of the first, smaller capacity lubrication sump by liquid level detection device 60.

Besides achieving liquid phase communication of the two liquid tanks, the first baffle 30 can inhibit liquid from flowing fast between the liquid tanks, so that liquid level fluctuation in the second liquid tank 20 can not influence the liquid level of the first liquid tank 10 obviously, and the problems of frequent disconnection and error protection caused by the liquid fluctuation in the first liquid tank 10 are avoided as much as possible.

Referring to fig. 2 (a) and 2 (b), in some embodiments, a second through hole is further formed in the first baffle 30, so as to enable gas communication between the first liquid tank 10 and the second liquid tank 20. This makes it possible to make the air pressure of the first liquid tank 10 and the second liquid tank 20 tend to be the same, while the liquid level of the liquid tanks remains the same.

In fig. 2 (a), the second through holes 32 include a plurality of through holes distributed over the first baffle plate 30, and in fig. 2 (b), the second through holes 32' include at least one through groove distributed over the first baffle plate 39. In addition, in fig. 2 (a) and 2 (b), the first through hole 31 may include a plurality of through holes. In addition, a plurality of mounting holes 33 may be provided in the first baffle 30.

For the first baffle 30 provided in the compressor, the first through holes 31 preferably include 3 to 5 through holes having a hole diameter of 6 to 8 mm. Thus, through the first through hole 31 with proper size, the flow of the oil in the second lubricating oil groove when entering the first lubricating oil groove through the first through hole 31 is slower and more stable, and the fluctuation of the second lubricating oil groove is reduced or avoided to be conducted to the first lubricating oil groove. In addition, the first through hole 31 is preferably arranged at a lower position, for example below the level switch protection line of the level detection device 60.

And the second through hole 32 may include 4 to 6 through holes having a hole diameter of 4 to 6mm (refer to fig. 2 (a)), or the second through hole 32' may include a through groove having a length of 35 to 40mm and a width of 4 to 6mm (refer to fig. 2 (b)). The second through holes 32, 32' may be through holes or through grooves of smaller dimensions with respect to the first through holes 31 and are located above the first through holes 31, for example above the level of the liquid in the lubrication groove, as is typically the case, so as to prevent lubrication oil of the second lubrication groove from flowing from the second through holes into the first lubrication groove.

Referring to fig. 1 and 3, the compressor body includes an oil drum 55, an oil screen 51, and a discharge end bearing housing 53. The second oil groove is located below the discharge end bearing housing 53 of the compressor body, and the first oil groove is located at a side of the second oil groove. As can be seen from fig. 1, the second oil groove has a larger volume. In fig. 3, when the exhaust pipe 56 of the compressor discharges gas to the oil content tank 55 (the flow direction of the gas can be referred to by the black arrow in fig. 3), the gas flows from the oil content tank 55 to the exhaust end bearing housing 53 side via the oil strainer 51, and is discharged from the exhaust port 54 of the compressor. While a portion of the gas flowing downwardly may have an effect on the level of the second lubricant sump, such as by deflecting the level of the second lubricant sump to cause relatively significant fluctuations.

To further dampen the liquid level fluctuations of the second lubrication groove, referring to fig. 3, in some embodiments a second baffle 40 may also be provided above the second lubrication groove for blocking the air flow from above the second lubrication groove from blowing straight into the interior of the second lubrication groove. In fig. 1 and 3, a second baffle 40 may be disposed at a side of the lower end of the oil screen 51 remote from the oil drum 55, and partially separates the discharge end bearing housing 53 from the second oil groove.

Referring to fig. 4, in order to fix the second barrier 40, a mounting edge 41 may be provided at one side of the second barrier 40, and the mounting edge 41 may be obtained by bending the second barrier 40. A plurality of mounting holes 42 may be provided in the mounting edge 41 for attachment to the oil strainer 51.

Referring to fig. 1 and 3, an oil filter 52 is also provided in the second lubricant sump. In order to avoid interference of the second baffle 40 with the oil filter 52, the second baffle 40 is preferably disposed above the oil filter 52.

Referring to fig. 1 and 3, through setting up first baffle 30 and second baffle 40 in the compressor, on the one hand through the blocking effect of second baffle 40, avoid directly blowing the second lubrication groove behind the air current from oil content bucket one side through the oil content filter screen, reduce the liquid level deflection and the fluctuation of second lubrication groove under the air current effect, on the other hand separates the fluctuation in the second lubrication groove and the liquid level in the first lubrication groove through the isolation effect of first baffle 30, thereby the liquid level in the second lubrication groove is difficult to take place to fluctuate, thereby both avoided liquid detection device to trigger the mistake protection, also can avoid the life that liquid level switch frequently break-make caused to shorten. Correspondingly, the control logic based on the liquid level detection device can be adjusted, and the shutdown protection is triggered when the oil level is stabilized below the protection line within a shorter time (for example, from 1min to 10 s), so that the responsiveness of the safety protection of the compressor is improved.

Thus, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A compressor, comprising:

a compressor body; and

a liquid level detection anti-interference structure;

wherein, liquid level detection noise immunity structure includes:

a first liquid tank (10);

a liquid level detection device (60) arranged in the first liquid tank (10) and used for detecting the liquid level in the first liquid tank (10);

a second liquid tank (20); and

a first baffle (30) arranged between the first liquid tank (10) and the second liquid tank (20), a first through hole (31) for realizing liquid phase communication between the first liquid tank (10) and the second liquid tank (20) is arranged on the first baffle (30),

wherein the first liquid groove (10) and the second liquid groove (20) are respectively a first lubrication groove and a second lubrication groove which are arranged at the bottom of the compressor body and are adjacent to each other; the compressor body comprises an oil content barrel (55), an oil content filter screen (51) and an exhaust end bearing seat (53), an exhaust pipe (56) of the compressor discharges gas to the oil content barrel (55), the gas flows to one side of the exhaust end bearing seat (53) from the oil content barrel (55) through the oil content filter screen (51), the compressor is discharged from an exhaust port (54) of the compressor, the second lubrication oil groove is positioned below the exhaust end bearing seat (53) of the compressor body, and the first lubrication oil groove is positioned at the side of the second lubrication oil groove; the compressor further comprises a second baffle (40) arranged above the second lubrication groove, wherein the second baffle (40) is arranged on one side, far away from the oil barrel (55), of the lower end of the oil filter screen (51), and the exhaust end bearing seat (53) is locally separated from the second lubrication groove.

2. Compressor according to claim 1, characterized in that the first baffle (30) is further provided with a second through hole (32) for enabling a gas phase communication between the first liquid tank (10) and the second liquid tank (20).

3. Compressor according to claim 2, characterized in that the second through hole (32, 32') is located above the first through hole (31).

4. The compressor according to claim 2, characterized in that said second through holes (32, 32') comprise a plurality of through holes or at least one through slot distributed on said first baffle (30).

5. The compressor of claim 1, wherein a capacity of the first lubrication groove is less than a capacity of the second lubrication groove.

6. The compressor of claim 1, wherein an oil filter (52) is further provided in the second lubrication sump, the second baffle (40) being located above the oil filter (52).

7. The compressor according to claim 1, characterized in that the first through holes (31) comprise 3-5 through holes with a pore size of 6-8 mm.

8. The compressor according to claim 1, wherein the first baffle (30) is further provided with second through holes (32) for achieving gas phase communication between the first liquid tank (10) and the second liquid tank (20), and the second through holes (32) comprise 4-6 through holes with a pore diameter of 4-6 mm or through grooves with a length of 35-40 mm and a width of 4-6 mm.