Air conditioner compressor exhaust pipeline and compressor

Abstract

The utility model provides an air conditioner compressor exhaust pipeline and a compressor, the air conditioner compressor exhaust pipeline comprises a compressor body, a silencer body and a compressor four-way valve body, the compressor body is connected with the silencer body through a connecting pipe, and the silencer body is connected with the compressor four-way valve body through an exhaust pipe. The exhaust pipe comprises a first air pipe, a second air pipe and a third air pipe, the first air pipe and the second air pipe are in U-shaped bent smooth connection, the end, away from the second air pipe, of the first air pipe is connected with an exhaust port of the compressor, and the end, away from the first air pipe, of the second air pipe is connected with the third air pipe through a first bent pipe; the end, away from the first bent pipe, of the third air pipe is connected with the silencer body. The problem that the joint of the air conditioner exhaust pipeline and the compressor exhaust pipe opening cracks frequently is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning pipelines, in particular to an air-conditioning compressor exhaust pipeline and a compressor. Background Art

[0002] Against the backdrop of continuous development of refrigeration technology, optimization and innovation of air-conditioning compressor exhaust piping is particularly important.

[0003] During after-sales maintenance in the market, a certain air conditioner often encountered cracks in the compressor exhaust pipe, causing the air conditioner refrigerant to leak and the compressor to malfunction. After-sales personnel visited the site for investigation and found that cracks and leaks occurred at the exhaust port welding position or about 5 to 10 mm away from the exhaust port welding position.

[0004] After analysis, the cracking of the compressor exhaust pipe should be related to the compressor piping scheme, especially the design defects of the exhaust pipe will cause a greater chance of cracking. The traditional exhaust muffler is designed at the vertical section closest to the exhaust outlet. The purpose is based on the general belief that the closer the muffler is to the exhaust port, the better the muffler effect. However, this increases the stress of the exhaust port and increases the center of gravity of the exhaust port, which is the direct cause of the exhaust cracking. In particular, the design defects of the exhaust pipe will cause a greater chance of cracking. For example, if the muffler is designed close to the compressor exhaust port, the center of gravity of the muffler will tend to the exhaust port, causing the exhaust stress to be concentrated at the exhaust port. The exhaust port itself is affected by brazing, and welding also causes a certain degree of damage to the metallographic structure of the copper pipe, which increases the risk of pipeline cracking. After review and analysis, the irrationality of the technical solution is found, the defects in the existing technology are solved, the cracking phenomenon is improved, and the reliability of the pipeline and the entire machine is improved. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention provides an air-conditioning compressor exhaust pipeline and a compressor, which solves the problem of frequent cracking at the connection between the air-conditioning exhaust pipeline and the compressor exhaust pipe port in the prior art.

[0006] According to an embodiment of the present utility model, an air-conditioning compressor exhaust pipeline includes a compressor body, a muffler body and a compressor four-way valve body, and the compressor body and the muffler body are connected by a connecting pipe, and the muffler body and the compressor four-way valve body are connected by an exhaust pipe, and the exhaust pipe includes a first air pipe, a second air pipe and a third air pipe, wherein the first air pipe and the second air pipe are smoothly connected in a U-shaped bend, the end of the first air pipe away from the second air pipe is connected to the compressor exhaust port, the end of the second air pipe away from the first air pipe is connected to the third air pipe through a first bend pipe, and the end of the third air pipe away from the first bend pipe is connected to the muffler body.

[0007] Preferably, the length of the first air tube is 40-50 mm.

[0008] Preferably, the length of the second air tube is 180-200 mm.

[0009] Preferably, the radius of the first bend is 25-30 mm.

[0010] Preferably, the length of the third air tube is 15-20 mm.

[0011] On the other hand, according to an embodiment of the present invention, the present invention further provides a compressor equipped with an exhaust pipe of an air-conditioning compressor.

[0012] Compared with the prior art, the present invention has the following beneficial effects: by optimizing the traditional exhaust pipe connecting the silencer and the compressor, changing the original size, thereby changing the silencer layout, the traditional first air pipe length is optimized from 80 to 90 mm to 40 to 50 mm, reducing its length, the traditional second air pipe length is optimized from 15 to 20 mm to 180 to 200 mm, increasing its length, the traditional first bend radius is optimized to 25 to 30 mm, and the length of the third air pipe at the connection with the silencer is optimized to 15 to 20 mm. According to the optimization of the exhaust pipe, the assembly direction of the silencer is adjusted so that the silencer is rotated 180° on the original basis and reversed, thereby changing the passage distance between the silencer and the compressor, improving the pipeline stress level, avoiding the exhaust stress concentration at the connection between the air-conditioning exhaust pipe and the compressor exhaust pipe port, thereby reducing the risk of cracking at the connection between the air-conditioning exhaust pipe and the compressor exhaust pipe port. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present utility model.

[0014] Figure 2 It is the front view of the embodiment of the present utility model.

[0015] Figure 3 This is a schematic structural diagram of the exhaust pipe in an embodiment of the present utility model.

[0016] Figure 4 This is a schematic structural diagram of the connecting pipe in an embodiment of the present utility model.

[0017] Figure 5 Schematic diagram of stress simulation comparison curve in the embodiment of the present utility model.

[0018] Figure 6 Schematic diagram of noise simulation comparison curve in the embodiment of the present utility model.

[0019] Figure 7 Schematic diagram of stress measurement comparison curve in the embodiment of the present utility model.

[0020] Figure 8Schematic diagram of noise measurement comparison curve in the embodiment of the present utility model.

[0021] In the above drawings: 108, exhaust pipe; 1081, first air pipe; 1082, second air pipe; 1083, first elbow; 1084, third air pipe; 109, muffler body; 110, connecting pipe; 111, compressor body; 1110, compressor exhaust port; 113, compressor four-way valve body. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0023] like Figures 1 to 4 As shown, an embodiment of the present invention proposes an air-conditioning compressor exhaust pipeline, which includes a compressor body 111, a muffler body 109 and a compressor four-way valve body 113, and the compressor body 111 is connected to the muffler body 109 through a connecting pipe 110, and the muffler body 109 is connected to the compressor four-way valve body 113 through an exhaust pipe 108, and the exhaust pipe 108 includes a first air pipe 1081, a second air pipe 1082 and a third air pipe 1084, wherein the first air pipe 1081 and the second air pipe 1082 are smoothly connected in a U-shaped bend, and the end of the first air pipe 1081 away from the second air pipe 1082 is connected to the compressor exhaust port 1110, the end of the second air pipe 1082 away from the first air pipe 1081 is connected to the third air pipe 1084 through a first bend pipe 1083, and the end of the third air pipe 1084 away from the first bend pipe 1083 is connected to the muffler body 109.

[0024] The detailed working process of this embodiment is as follows: using ANSYS pipeline simulation technology, combined with theoretical reasoning, and conducting experimental comparative verification, on a 2HP variable frequency large-displacement single-rotor compressor, the traditional exhaust pipe and muffler design is overturned, and the exhaust muffler is innovatively designed to the side away from the exhaust pipe, and the center of gravity of the exhaust pipe muffler is moved away from the exhaust pipe port. The new solution has greatly improved the vibration stress on the side closest to the exhaust port compared to the traditional exhaust muffler; since the first air pipe 1801 is a copper tube, it is very flexible and easily deformed and damaged during transportation and falling, affecting the pipeline stress, which is also the cause of the cracking of the air pipeline. By reducing the first air pipe 1801 on the basis of the original length to increase the rigidity of the first air pipe 1801, the problem of pipeline operation and falling deformation is improved, so as to improve the pipeline reliability. Through its optimization, the original pipeline exhaust cracking problem is completely solved, and the reliability of the pipeline and the whole machine is greatly improved.

[0025] Based on the optimization of the exhaust pipe 108, the connecting pipe 110 is optimized accordingly. The pipe will be designed based on the spatial dimensions of the entire exhaust pipe assembly and the four-way valve assembly. The connecting pipe has little effect on noise and vibration, does not interfere with each other, and can achieve the connection function.

[0026] like Figure 3 As shown, the length of the first air pipe 1081 is 40 to 50 mm.

[0027] like Figure 3 As shown, the length of the second air pipe 1082 is 180 to 200 mm.

[0028] like Figure 3 As shown, the radius of the first bend 1083 is 25 to 30 mm.

[0029] like Figure 3 As shown, the length of the third air tube 1084 is 15 to 20 mm.

[0030] like Figure 2 As shown, a compressor equipped with an air-conditioning compressor exhaust pipe is also provided.

[0031] The implementation principle of the embodiment of this application is: the effectiveness and reliability of the optimization scheme are verified by modeling with ANSYS simulation software:

[0032] 1. Model simulation stress comparison: The original pipeline and the improved optimized pipeline were brought into the ANSYS simulation software for model stress simulation. The simulation results show that the exhaust pipe has a mode at around 75-85Hz. The simulation shows that the exhaust stress of the original exhaust pipe in this frequency band is too large; the improved scheme disappears the mode at 75-85Hz, and the other frequency bands are also reduced. The simulation comparison results show that the improved scheme is effective. The exhaust stress comparison simulation curve is shown in Figure 5 (The low frequency range of the simulation curve below 40Hz is for reference only. The actual control has compressor torque compensation control in the low frequency range);

[0033] 2. Model simulation noise comparison: The original pipeline and the improved optimized pipeline were brought into the ANSYS simulation software for model noise simulation. It can be seen from the noise simulation curve that the sound power level of the improved state is still lower than that of the original state below 100Hz in the normal operating frequency band of the compressor. The simulation curve is shown in Figure 6 ;

[0034] 3. Comparison of measured stress: First, conduct stress test on the original pipeline on the same complete machine, and stick stress strain gauges at the exhaust port to measure the actual operating stress within the 105Hz frequency band. Figure 7It can be seen from the stress curve that the original pipeline has a high stress at 75-90Hz, reaching a maximum of about 19Mpa, which exceeds the standard. The enterprise standard limit is <12.5Mpa. The modal simulation of this section also exceeds the standard at around 75-85Hz. The theory and simulation are basically consistent. Therefore, the reason for the cracking of the exhaust pipe opening in the high-frequency heating band in the market is supported, that is, the modal stress of the pipeline in this frequency band exceeds the standard. Further, the actual operating stress within the 105Hz frequency band was also tested by replacing the improved pipeline under the same load. Figure 7 From the stress curve, we can see that the original 75-90Hz stress exceeding the standard problem has been effectively improved. The measured stress has been reduced by about 5Mpa. The average stress value of the entire frequency band is within 6.5Mpa, which is qualified. The subjective feeling of the pipeline vibration improvement scheme is also much smaller than the original scheme. The measured improvement effect is obvious. The stress comparison curve is shown in Figure 7 ;

[0035] 4. Comparison of measured noise: noise tests were conducted on the same complete machine. First, the noise of the original pipeline was tested, and then the noise of the pipeline with the improved solution was tested. Through subjective evaluation and noise spectrum comparison, the conclusion was that the new solution had no effect on the noise. The noise spectrum comparison curve is shown in Figure 8 ;

[0036] 5. Pipeline reliability verification: A batch of 10 prototypes of the improved pipeline were assembled and subjected to pipeline reliability operation. The prototype operating conditions involved reliability operation in various high, medium and low frequency scenarios of cooling and heating, and the verification lasted for 15 to 23 days respectively. After disassembly and inspection of each item, the prototype pipelines were found to be in good condition with no cracking, and the pipeline reliability was demonstrated.

[0037] Compared with the traditional exhaust muffler which is designed to be located closest to the exhaust outlet vertical section, which is prone to cause exhaust cracking in the pipe, by changing the muffler position, the muffler is subverted and designed at the original exhaust outlet (such as Figure 1 ) on the other side of the vehicle, the distance between the muffler and the exhaust pipe is increased, and the corresponding pipeline route and size are optimized according to the position of the muffler, which greatly improves the vibration stress. At the same time, the optimized pipeline path and size avoid the deformation of the exhaust port caused by the impact of falling during transportation.

[0038] Through the above theoretical simulation and actual measurement verification, various indicators and results prove that the new technology improvement plan has obvious improvement effect.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An air conditioner compressor exhaust pipeline, comprising a compressor body (111), a muffler body (109), and a compressor four-way valve body (113), wherein the compressor body (111) and the muffler body (109) are connected via a connecting pipe (110), and the muffler body (109) and the compressor four-way valve body (113) are connected via an exhaust pipe (108), characterized in that: The exhaust pipe (108) comprises a first air pipe (1081), a second air pipe (1082) and a third air pipe (1084), wherein the first air pipe (1081) and the second air pipe (1082) are smoothly connected in a U-shaped bend, the end of the first air pipe (1081) away from the second air pipe (1082) is connected to the compressor exhaust port (1110), the end of the second air pipe (1082) away from the first air pipe (1081) is connected to the third air pipe (1084) through a first bend (1083), and the end of the third air pipe (1084) away from the first bend (1083) is connected to the muffler body (109).

2. The air conditioner compressor exhaust pipeline according to claim 1, characterized in that: The length of the first air tube (1081) is 40 to 50 mm.

3. The air conditioner compressor exhaust pipeline according to claim 1, characterized in that: The second air pipe (1082) has a length of 180 to 200 mm.

4. The air conditioner compressor exhaust pipeline according to claim 1, characterized in that: The radius of the first curved pipe (1083) is 25 to 30 mm.

5. The air conditioner compressor exhaust pipeline according to claim 1, characterized in that: The length of the third air tube (1084) is 15 to 20 mm.

6. A compressor, characterized in that: An air-conditioning compressor exhaust pipeline according to any one of claims 1 to 5 is installed.

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