Anti-backflow air suction silencer

Abstract

The utility model discloses an anti-backflow air suction silencer which comprises an upper silencing cavity, a communicating pipe and a lower silencing cavity, an air outlet pipeline is arranged on the upper silencing cavity, the communicating pipe is located at the bottom of the upper silencing cavity and communicated with the air outlet pipeline, an air suction pipeline is arranged on the side face of the lower silencing cavity, and the communicating pipe is communicated with the air outlet pipeline. An oil leakage mechanism is arranged on the bottom face of the lower silencing cavity and / or the communicating pipe and comprises a lower opening and an upper opening, an oil leakage channel is formed between the lower opening and the upper opening, and a reverse hedging channel is formed in the upper side of the oil leakage channel in parallel. An upper outlet of the reverse hedging channel is connected with the oil leakage channel, and the outlet direction is downward; the engine oil pump has the advantages of preventing engine oil from being sucked back, being smooth in oil discharge and being simple in structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressor silencers, and in particular relates to an anti-backflow suction silencer. Background Art

[0002] The suction muffler, also called the suction muffler, is an important part of the compressor pump body and is usually installed in front of the cylinder seat together with the valve group. The muffler is provided with an air inlet pipe and an air outlet pipe.

[0003] During the suction process of the compressor, the refrigerant enters from the inlet of the muffler and enters the cylinder from the outlet to complete the suction process. In fact, due to the high temperature, crankshaft pump oil and negative pressure in the compressor, there is a certain amount of lubricating oil in the refrigerant sucked into the intake pipe. Therefore, in terms of structural design, an oil leakage hole is designed at the lowest point of the muffler volume so that the lubricating oil can flow out of the muffler smoothly to the bottom oil pool during the non-suction process. However, due to the existence of the oil leakage hole, the lubricating oil in the oil pool is more likely to enter the muffler during the suction process. The lubricating oil entering the rare muffler will increase the suction flow resistance and reduce the effective suction mass flow, which will eventually lead to a decrease in compressor efficiency and an increase in oil discharge, affecting the operation of the refrigeration system. In order to ensure the silencing effect, the oil leakage hole is designed to have a small diameter, usually φ1mm-φ3mm, and the oil leakage is limited during the non-suction process.

[0004] The problem with the existing technology is that the existing oil leakage hole has bidirectional circulation, and the lubricating oil is easily sucked into the muffler from the oil pool during the intake process, resulting in increased intake resistance and reduced intake efficiency. Eventually, the oil enters the cylinder with the air flow, affecting the efficiency of the compressor and causing an increase in oil discharge. Summary of the invention

[0005] The utility model aims to provide an anti-backflow suction muffler to solve the problems existing in the prior art, which has the advantages of preventing oil backflow, smooth oil discharge and simple structure.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a backflow prevention suction muffler, comprising an upper silencer chamber, a connecting pipe and a lower silencer chamber, the upper silencer chamber is provided with an air outlet pipe, the connecting pipe is located at the bottom of the upper silencer chamber, the connecting pipe is connected with the air outlet pipe, the side of the lower silencer chamber is provided with an air suction pipe, the bottom surface of the lower silencer chamber and or the connecting pipe are provided with an oil leakage mechanism, the oil leakage mechanism comprises a lower opening and an upper opening, an oil leakage channel is opened between the lower opening and the upper opening, a reverse counter-hedge channel is opened in parallel on the upper side of the oil leakage channel, the upper outlet of the reverse counter-hedge channel is connected to the oil leakage channel and the outlet direction is downward.

[0007] In the above scheme, a silencer cavity space is formed by connecting the upper silencer cavity with the lower silencer cavity, and the air flow enters from the air intake duct of the lower silencer cavity, flows through the connecting pipe, and finally flows out from the air outlet duct of the upper silencer cavity. The oil leakage mechanism can be arranged on the bottom surface of the lower silencer cavity or on the connecting pipe as needed. In the suction state, the air flow and oil droplets are sucked into the oil leakage mechanism from the lower opening, and are diverted into the oil leakage channel and the reverse offset channel. The air flow and oil droplets in the reverse offset channel are lifted and then offset downward with the rising air flow and oil droplets in the oil leakage channel. The kinetic energy of the oil droplets in the two directions cancel each other out, so that the oil droplets cannot continue to rise, reducing the oil droplets being sucked into the valve group and the cylinder with the air flow. In the non-suction state, under the action of gravity, the oil droplets fall from the upper opening through the oil leakage channel from the lower opening, and finally leave the suction muffler.

[0008] Furthermore, the lower opening and the upper opening are both arranged in a vertical direction, and the reverse counter-flow channel includes a straight flow channel and an arc-shaped flow channel arranged at the top of the straight flow channel.

[0009] The lower opening and the upper opening are arranged vertically to facilitate the falling of the oil droplets. The airflow and the oil droplets are raised through the straight flow channel and turned through the arc flow channel to make the airflow and the oil droplets flow downward to offset the rising oil droplets in the oil leakage channel and offset the rising kinetic energy of the oil droplets.

[0010] Furthermore, the oil leakage channel comprises an inclined flow channel, the top of the inclined flow channel is connected to the upper opening, and the arc-shaped flow channel is connected to the inclined flow channel.

[0011] The inclined flow channel is used to lift the airflow and oil droplets upward, and to form a set angle with the outlet of the arc-shaped flow channel. The oil droplets after energy dissipation eventually fall back downward. The inclined flow channel is staggered at a certain angle from the vertical upper opening, which is convenient for the oil droplets to dissipate energy and fall back.

[0012] Furthermore, the angle between the upper outlet direction of the arc-shaped flow channel and the inclined flow channel is 100°-170°.

[0013] The angle between the upper outlet direction of the arc-shaped flow channel and the inclined flow channel is 100°-170°, which is convenient for oil droplet energy dissipation and reduces the resistance to airflow.

[0014] Furthermore, an oil leakage mechanism is provided on the bottom surface of the lower muffler chamber, and the oil leakage mechanism includes a fixed block, the upper opening is located at the top of the fixed block, and the lower opening is located at the bottom of the lower muffler chamber.

[0015] The oil leakage mechanism on the bottom of the silencer cavity is used to discharge the oil in the silencer cavity, and a fixing block is arranged to facilitate the opening of a lower opening, an upper opening, an oil leakage channel and a reverse flushing channel.

[0016] Furthermore, a guide plate for guiding the airflow to the connecting pipe is arranged on the bottom surface of the lower muffler chamber, the position of the guide plate corresponds to the outlet of the air intake duct, and the connecting pipe is located directly above the guide plate.

[0017] The guide plate is provided to guide the airflow of the air intake duct to the connecting pipe, thereby reducing the turbulence inside the cavity and improving the air intake efficiency.

[0018] Furthermore, the fixed block corresponds to the position of the guide plate, and the guide plate includes an arc surface or an inclined plate surface.

[0019] By arranging the fixing block and the guide plate correspondingly, the influence of the fixing block on the internal airflow is reduced, and the structure of the arc surface or the inclined plate surface is simple.

[0020] Furthermore, a communicating vessel is provided between the upper muffler chamber and the lower muffler chamber, and the communicating pipe is provided on the communicating vessel.

[0021] The communicating vessel is clamped and arranged between the upper muffler chamber and the lower muffler chamber, and comprises a partition plate and a communicating pipe.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] 1. By setting up the oil leakage mechanism, in the suction stage, the oil leakage channel and the reverse counter-attack channel are used to realize the diversion and counter-attack of the airflow and oil droplets, and the counter-attack is used to offset and reduce the kinetic energy of the oil droplets rising, so that the kinetic energy of the oil droplets is insufficient to continue to rise, thereby realizing the function of preventing the oil droplets from being sucked back into the muffler. At the same time, it does not affect the normal falling of the oil droplets from the oil leakage channel in the non-suction state, realizing the one-way flow of the oil droplets, and the oil discharge effect is good;

[0024] 2. The oil leakage channel and the reverse counter-flow channel are opened in parallel to prevent oil droplets from being sucked back, with a simple structure and easy manufacturing;

[0025] 3. The oil leakage mechanism can be set on the bottom surface of the lower muffler chamber or on the connecting pipe, which has a wide range of applications, prevents oil from being sucked into the cylinder, and ensures the performance of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural section of an anti-backflow suction muffler of Example 1 of the utility model Figure 1 ;

[0027] Figure 2 This is a structural section of an anti-backflow suction muffler of Example 1 of the utility model Figure 2 ;

[0028] Figure 3 It is a structural cross-sectional view of the oil leakage mechanism in Example 1 of the utility model;

[0029] Figure 4This is a structural cross-sectional view of an anti-backflow suction muffler according to Example 2 of the utility model;

[0030] In the figure: 1, upper silencer chamber; 2, lower silencer chamber; 3, connecting pipe; 4, air outlet pipe; 5, air intake pipe; 6, lower opening; 7, upper opening; 8, straight flow channel; 9, arc flow channel; 10, inclined flow channel; 11, partition; 12, fixing block; 13, guide plate; 14, inclined plate surface. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative labor are within the scope of protection of the utility model. In the description of the utility model, it should be noted that the terms front, back, left, right, etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the utility model product is usually placed when used. They are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0032] Example 1

[0033] like Figure 1-3 As shown, a backflow prevention suction muffler comprises an upper silencer chamber 1, a connecting pipe 3 and a lower silencer chamber 2, wherein an air outlet pipe 4 is arranged on the upper silencer chamber 1, and the connecting pipe 3 is located at the bottom of the upper silencer chamber 1, and the connecting pipe 3 is communicated with the air outlet pipe 4, an air intake pipe 5 is arranged on the side of the lower silencer chamber 2, and an oil leakage mechanism is arranged on the bottom surface of the lower silencer chamber 2, and the oil leakage mechanism comprises a lower opening 6 and an upper opening 7, an oil leakage channel is opened between the lower opening 6 and the upper opening 7, a reverse counter-flow channel is opened in parallel on the upper side of the oil leakage channel, and an upper outlet of the reverse counter-flow channel is connected to the oil leakage channel and the outlet direction faces downward.

[0034] In the above scheme, a silencer cavity space is formed by docking the upper silencer cavity 1 with the lower silencer cavity 2, and the air flow enters from the air intake pipe 5 of the lower silencer cavity 2, flows through the connecting pipe 3, and finally flows out from the air outlet pipe 4 of the upper silencer cavity 1. The oil leakage mechanism can be arranged on the bottom surface of the lower silencer cavity 2 or on the connecting pipe 3 as needed. In the suction state, the air flow and oil droplets are sucked into the oil leakage mechanism from the lower opening 6, and are diverted into the oil leakage channel and the reverse offset channel. The air flow and oil droplets in the reverse offset channel are lifted and then offset downward with the rising air flow and oil droplets in the oil leakage channel. The kinetic energy of the oil droplets in the two directions offset each other, so that the oil droplets cannot continue to rise, reducing the oil droplets being sucked into the valve group and the cylinder with the air flow. In the non-suction state, under the action of gravity, the oil droplets fall from the upper opening 7 through the oil leakage channel from the lower opening 6, and finally leave the suction muffler.

[0035] The cross-sectional shapes of the lower opening 6, the upper opening 7, the reverse counter-flow channel and the oil leakage channel are consistent, preferably circular or square, and the upper muffler chamber 1 and the lower muffler chamber 2 are welded. The bottom ends of the reverse counter-flow channel and the oil leakage channel are connected to the lower opening 6, and the top ends of the reverse counter-flow channel and the oil leakage channel are connected to the upper opening 7. One or more reverse counter-flow channels can be provided as required. The lower opening 6 and the upper opening 7 can be collinear or non-collinear.

[0036] Furthermore, the lower opening 6 and the upper opening 7 are both arranged in a vertical direction, and the reverse counter-flow channel includes a straight flow channel 8 and an arc flow channel 9 arranged at the top of the straight flow channel 8 .

[0037] The lower opening 6 and the upper opening 7 are arranged vertically to facilitate the falling of the oil droplets. The airflow and the oil droplets are lifted by the straight flow channel 8 and diverted by the arc flow channel 9 to make the airflow and the oil droplets flow downward to counteract the rising oil droplets in the oil leakage channel and offset the rising kinetic energy of the oil droplets.

[0038] The straight channel 8 can be arranged vertically or inclined.

[0039] Furthermore, the oil leakage channel comprises an inclined flow channel 10 , the top of the inclined flow channel 10 is connected to the upper opening 7 , and the arc-shaped flow channel 9 is connected to the inclined flow channel 10 .

[0040] The inclined flow channel 10 is used to lift the airflow and the oil droplets upward, and is convenient for forming a set angle with the outlet of the arc-shaped flow channel 9. The oil droplets after energy dissipation eventually fall back downward. The inclined flow channel 10 is staggered at a certain angle with the vertical upper opening 7, which is convenient for the oil droplets to dissipate energy and fall back.

[0041] The inclined flow channel 10 is arranged to be inclined upward by 45 degrees.

[0042] Furthermore, the angle between the upper outlet direction of the arc-shaped flow channel 9 and the inclined flow channel 10 is 100°-170°.

[0043] The included angle between the axis direction of the upper outlet of the arc-shaped flow channel 9 and the axis direction of the inclined flow channel 10 is 100°-170°, which is convenient for oil droplet energy dissipation and reduces the resistance to airflow.

[0044] The angle is preferably 120°-150°.

[0045] Furthermore, an oil leakage mechanism is provided on the bottom surface of the lower muffler chamber 2 , and the oil leakage mechanism includes a fixing block 12 . The upper opening 7 is located at the top of the fixing block 12 , and the lower opening 6 is located at the bottom of the lower muffler chamber 2 .

[0046] The oil leakage mechanism at the bottom of the silencer cavity is used to discharge the oil in the silencer cavity, and a fixing block 12 is provided to facilitate the opening of the lower opening 6, the upper opening 7, the oil leakage channel and the reverse flushing channel.

[0047] Furthermore, a guide plate 13 for guiding the airflow to the connecting pipe 3 is provided on the bottom surface of the lower muffler chamber 2 . The position of the guide plate 13 corresponds to the outlet of the air intake duct 5 , and the connecting pipe 3 is located directly above the guide plate 13 .

[0048] The guide plate 13 is provided to guide the airflow of the air intake duct 5 to the connecting pipe 3, thereby reducing the turbulence inside the cavity and improving the air intake efficiency.

[0049] Furthermore, the fixed block 12 corresponds to the position of the guide plate 13 , and the guide plate 13 includes an arc surface or an inclined plate surface 14 .

[0050] By arranging the fixing block 12 and the guide plate 13 correspondingly, the influence of the fixing block 12 on the internal airflow is reduced, and the arc surface or the inclined plate surface 14 has a simple structure.

[0051] The guide plate 13 and the fixing block 12 are arranged in close contact with each other, and the guide plate 13 and the fixing block 12 can be arranged as a separate structure or an integrated structure.

[0052] Example 2

[0053] like Figure 4 As shown, a backflow prevention suction muffler in this embodiment is further modified as follows on the basis of Embodiment 1:

[0054] The connecting pipe 3 is provided with an oil leakage mechanism. The upper opening 7 of the oil leakage mechanism corresponds to the upper pipe opening of the connecting pipe 3 , and the lower opening 6 of the oil leakage mechanism corresponds to the lower pipe opening of the connecting pipe 3 .

[0055] Furthermore, a communicating vessel is provided between the upper muffler chamber 1 and the lower muffler chamber 2, and the communicating pipe 3 is provided on the communicating vessel.

[0056] The communicating vessel is disposed between the upper muffler chamber 1 and the lower muffler chamber 2 and comprises a partition plate 11 and a communicating pipe 3 .

[0057] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A backflow prevention suction muffler, characterized in that: It includes an upper silencer chamber, a connecting pipe and a lower silencer chamber, wherein an air outlet pipe is arranged on the upper silencer chamber, the connecting pipe is located at the bottom of the upper silencer chamber, the connecting pipe is connected with the air outlet pipe, an air intake pipe is arranged on the side of the lower silencer chamber, an oil leakage mechanism is arranged on the bottom surface of the lower silencer chamber and or on the connecting pipe, the oil leakage mechanism comprises a lower opening and an upper opening, an oil leakage channel is opened between the lower opening and the upper opening, a reverse counter-hedge channel is opened in parallel on the upper side of the oil leakage channel, an upper outlet of the reverse counter-hedge channel is connected with the oil leakage channel and the outlet direction faces downward.

2. The anti-backflow suction muffler according to claim 1, characterized in that: The lower opening and the upper opening are both arranged in a vertical direction, and the reverse counter-flow channel comprises a straight flow channel and an arc-shaped flow channel arranged at the top of the straight flow channel.

3. The anti-backflow suction muffler according to claim 2, characterized in that: The oil leakage channel comprises an inclined flow channel, the top of the inclined flow channel is connected to the upper opening, and the arc-shaped flow channel is connected to the inclined flow channel.

4. The anti-backflow suction muffler according to claim 3, characterized in that: The angle between the upper outlet direction of the arc-shaped flow channel and the inclined flow channel is 100°-170°.

5. The anti-backflow suction muffler according to claim 1, characterized in that: The bottom surface of the lower muffler cavity is provided with an oil leakage mechanism, and the oil leakage mechanism comprises a fixing block, the upper opening is located at the top of the fixing block, and the lower opening is located at the bottom of the lower muffler cavity.

6. The anti-backflow suction muffler according to claim 5, characterized in that: A guide plate for guiding the airflow to the connecting pipe is arranged on the bottom surface of the lower muffler chamber. The position of the guide plate corresponds to the outlet of the air intake duct, and the connecting pipe is located directly above the guide plate.

7. The anti-backflow suction muffler according to claim 6, characterized in that: The fixed block corresponds to the position of the guide plate, and the guide plate includes an arc surface or an inclined plate surface.

8. The anti-backflow suction muffler according to claim 1, characterized in that: A communicating vessel is arranged between the upper muffler chamber and the lower muffler chamber, and the communicating pipe is arranged on the communicating vessel.

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