Compressor exhaust noise elimination structure and compressor

Abstract

The utility model provides a compressor exhaust noise elimination structure and a compressor, the compressor exhaust noise elimination structure comprises a shell provided with an exhaust cavity and an exhaust port, the shell comprises a fixed cavity wall provided with the exhaust port and a plurality of detachable cavity walls which are detachably connected with the fixed cavity wall and define the exhaust cavity, and at least one noise elimination piece is arranged on at least one detachable cavity wall; the silencing piece is arranged on the detachable cavity wall, the cavity volume of the exhaust cavity and the shape of the air cavity are changed in a targeted mode, the inherent frequency of the air cavity is adjusted, and therefore the purposes of silencing and noise reduction are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to compressor equipment technical field, more specifically, relate to a kind of compressor exhaust muffling structure and compressor. BACKGROUND

[0002] Compressor operating process compression cavity and suction exhaust cavity periodic communication, cause the unstable flow of gas, cause suction exhaust cavity airflow pulsation, to aggravate the vibration noise in suction exhaust cavity, since exhaust high pressure and exhaust end pressure exist overcompression or undercompression problem, exhaust cavity airflow pulsation induces more serious noise problem. SUMMARY

[0003] The utility model discloses a kind of compressor exhaust muffling structure and compressor, to solve the noise problem caused by compressor exhaust airflow pulsation in prior art.

[0004] To achieve the above object, the technical scheme adopted by the utility model is as follows:

[0005] The utility model discloses a kind of compressor exhaust muffling structure, including the shell with exhaust cavity and exhaust port, the shell includes the fixed cavity wall with the exhaust port, and multiple detachable cavity wall are detachably connected with the fixed cavity wall and surround the exhaust cavity, at least one detachable cavity wall is provided with at least one muffler.

[0006] Further, each detachable cavity wall is provided with a plurality of reserved mounting holes for mounting the muffler.

[0007] Further, multiple detachable cavity wall has different number of the reserved mounting hole.

[0008] Further, each detachable cavity wall is provided with a plurality of the muffler, and the surface gap of each adjacent two mufflers is 5mm-10mm.

[0009] Further, the shape of the muffler is cylindrical or conical.

[0010] Further, the both side walls of the muffler are provided with clamping position for wrench clamping.

[0011] Further, the clamping position is clamping plane.

[0012] Further, one end of the muffler is provided with fastening stud for being threadedly connected with the detachable cavity wall.

[0013] The utility model also provides a kind of compressor, including the compressor exhaust muffling structure as described before.

[0014] Further, the compressor is a screw compressor.

[0015] Compared with the prior art, the compressor exhaust muffling structure and the compressor have the beneficial effects that: the utility model focuses on the noise source, through the detachable cavity wall provided with the muffling piece, the cavity volume and the air cavity form of the exhaust cavity are changed, the air cavity natural frequency is adjusted, so that the noise reduction purpose is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of the drawings.

[0017] Figure 1 It is a cross-sectional structure schematic of the compressor exhaust muffling structure in the utility model Figure One ;

[0018] Figure 2 It is a cross-sectional structure schematic of the compressor exhaust muffling structure in the utility model Figure Two ;

[0019] Figure 3 It is a cross-sectional structure schematic of the compressor exhaust muffling structure in the utility model Figure Three ;

[0020] Figure 4 It is a cross-sectional structure schematic of the compressor exhaust muffling structure in the utility model Figure Four ;

[0021] Figure 5 It is a side view structure schematic of the muffling piece in the utility model Figure One ;

[0022] Figure 6 It is a side view structure schematic of the muffling piece in the utility model Figure Two ;

[0023] Among them, the main marks of each drawing in the drawing are:

[0024] 1, the shell;

[0025] 2, the exhaust port;

[0026] 3, the exhaust cavity;

[0027] 4, the muffling piece;

[0028] 42, the fastening stud;

[0029] 5, the clamping position. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0031] During compressor operation, the periodic connection between the compression chamber and the suction and discharge chambers causes unstable gas flow, resulting in airflow pulsation in the suction and discharge chambers. This exacerbates vibration noise within the chambers. Due to over-compression or under-compression issues at the discharge high pressure and final discharge pressure, the airflow pulsation in the discharge chamber induces even more severe noise problems. However, the airflow pulsation noise problem within the compressor discharge chamber has long been a challenging issue for designers and manufacturers in the industry. Various solutions have been implemented to alleviate the problem, such as wrapping the compressor discharge side with sound-absorbing cotton and installing a silencer between the compressor discharge port and the condenser. However, the noise reduction effects are generally limited.

[0032] Based on this, the present invention proposes a compressor exhaust silencing structure and compressor, which absorbs vibration sound energy through airflow resonance and sound wave reflection, thereby significantly reducing exhaust pulsation.

[0033] Please refer to the following: Figures 1 to 4 The compressor exhaust noise reduction structure proposed in this utility model includes a housing 1 having an exhaust chamber 3 and an exhaust port 2. The housing 1 includes a fixed cavity wall with an exhaust port 2 and a plurality of detachable cavity walls that are detachably connected to the fixed cavity wall and form the exhaust chamber 3. At least one noise reduction component 4 is provided on at least one detachable cavity wall.

[0034] This invention focuses on the source of noise generation. By installing a sound-absorbing component 4 on the detachable cavity wall, the volume and shape of the exhaust cavity 3 are specifically changed, and the natural frequency of the air cavity is adjusted, thereby achieving the purpose of noise reduction.

[0035] More preferably, each detachable cavity wall has multiple reserved mounting holes for installing the muffler 4. The reserved mounting holes can be threaded holes to achieve a threaded connection between the muffler 4 and the detachable cavity wall.

[0036] More preferably, the multiple detachable cavity walls have different numbers of pre-drilled mounting holes.

[0037] Of course, in other alternative embodiments, multiple removable cavity walls may have the same number of reserved mounting holes.

[0038] In actual application, although each detachable cavity wall is provided with a plurality of reserved mounting holes, it is not required that a muffling member 4 is installed in each reserved mounting hole, so that the number and position of the muffling members 4 are various to realize the variability of the cavity volume and the cavity shape of the exhaust cavity 3, and the adaptability is wider. If it is required to change the number and position of the muffling members 4, only the detachable cavity wall is disassembled, the muffling members 4 are increased, reduced or moved, and then the detachable cavity wall is assembled, so that the whole disassembly and assembly process is simple and convenient.

[0039] Further preferably, the number of the detachable cavity walls is three, and each of the three detachable cavity walls is provided with 5-10 reserved mounting holes.

[0040] In actual application, the three detachable cavity walls are a detachable left cavity wall, a detachable right cavity wall and a detachable bottom cavity wall respectively; the detachable bottom cavity wall is provided with 5 reserved mounting holes, that is, the detachable bottom cavity wall is provided with at most 5 muffling members 4; the detachable right cavity wall is provided with 7 reserved mounting holes, that is, the detachable bottom cavity wall is provided with at most 7 muffling members 4; and the detachable right cavity wall is provided with 8 reserved mounting holes, that is, the detachable right cavity wall is provided with at most 8 muffling members 4.

[0041] Of course, in other optional embodiments, more reserved mounting holes can be provided on each detachable cavity wall. It can be understood that the more the number of the reserved mounting holes is, the more the types of the cavity volume and the cavity shape of the exhaust cavity 3 are.

[0042] Further preferably, a plurality of muffling members 4 are arranged on each detachable cavity wall, and the surface gap between each adjacent two muffling members 4 is 5-10 mm.

[0043] It should be noted that the adjacent two muffling members 4 should be installed in the adjacent two reserved mounting holes, and if this condition is not met, the two muffling members 4 are not adjacent.

[0044] In actual application, the airflow in the exhaust cavity 3 is continuously reflected between the muffling members 4, so that the airflow pulsation amplitude in the exhaust cavity 3 is effectively reduced. By reasonably setting the surface gap between each adjacent two muffling members 4, the sound wave reflection between the muffling members 4 is strengthened, the sound reduction effect is improved, the muffling members 4 are conveniently clamped by a wrench, the disassembly and assembly of the muffling members 4 are facilitated, the tooling is adapted to the sleeve wrench and the like, and the tooling torque strength is met.

[0045] Further preferably, the shape of the muffling member 4 is a cylindrical shape or a conical shape. Meanwhile, the surface of the muffling member 4 is smooth.

[0046] Of course, in other optional embodiments, the shape of the muffling member 4 can also be a trapezoidal circular truncated cone and the like. That is, the shape of the muffling member 4 can be flexibly set according to actual requirements.

[0047] In practical application, different shapes of the muffler 4 can be installed on the detachable cavity wall, so that the cavity volume of the exhaust cavity 3 and the shape of the cavity are more variable, and the selection of the cavity inherent frequency is more.

[0048] Further preferably, as shown in Figure 6 , the two side walls of the muffler 4 are provided with clamping positions 5 for clamping with a wrench.

[0049] In practical application, when the muffler 4 is detached or installed, a wrench needs to be used to clamp the muffler 4. The clamping positions 5 provided on the two side walls of the muffler 4 facilitate the clamping of the wrench and facilitate the detachment and installation of the muffler 4.

[0050] Further preferably, the clamping position 5 is a clamping plane. Since the flatness and accuracy of the clamping plane are generally high, the wrench can be accurately positioned to the required clamping position, and the clamping plane has a large contact area, so that the wrench can more easily exert force when clamping, thereby improving the clamping stability.

[0051] Of course, in other optional embodiments, the clamping position 5 can be a clamping inclined surface or a clamping groove.

[0052] Further preferably, as shown in Figure 5 , Figure 6 , one end of the muffler 4 is provided with a fastening stud 42 for threaded connection with the detachable cavity wall, so that the muffler 4 is installed in the exhaust cavity 3 through threaded cooperation with the detachable cavity wall.

[0053] The compressor preferably disclosed in the utility model is a screw compressor, which has a relatively simple structure, fewer parts, and high reliability.

[0054] The screw compressor comprises a compressor exhaust muffling structure, and the exhaust airflow pulsation noise is small.

[0055] As shown in Figure 1 , the compressor exhaust muffling structure comprises a shell 1 provided with an exhaust cavity 3 and an exhaust port 2.

[0056] Specifically, the shell 1 comprises a fixed cavity wall and three detachable cavity walls that jointly form the exhaust cavity 3, and the detachable cavity walls are detachably connected with the fixed cavity wall through bolts. The top of the fixed cavity wall is provided with the exhaust port 2, and the three detachable cavity walls are a detachable left side cavity wall, a detachable right side cavity wall and a detachable bottom cavity wall. The detachable left side cavity wall is internally provided with 7 reserved mounting holes, the detachable right side cavity wall is internally provided with 8 reserved mounting holes, and the detachable bottom cavity wall is internally provided with 5 reserved mounting holes. The reserved mounting holes are preferably threaded holes.

[0057] As shown in Figures 1 to 6As shown in the figure, some or all of the reserved mounting holes are mounted with muffling pieces 4. The shape of the muffling piece 4 is conical, the two side walls of the muffling piece 4 are provided with clamping positions 5, and the end of the muffling piece 4 is provided with a fastening stud 42. If there are two or more than two muffling pieces 4 in sequence, the surface gap between the muffling pieces 4 is 5mm-10mm.

[0058] Because three detachable cavity walls are respectively provided with a plurality of reserved mounting holes, the number and position of the muffling pieces 4 are various, so that the cavity volume and the cavity shape of the exhaust cavity 3 are also various, which has different effects on the airflow pulsation of the same frequency.

[0059] It should be understood that the installation purpose of the muffling pieces 4 on the three detachable cavity walls is the same, but the effect may be different. Because the installation position of the muffling piece 4 is different, the airflow reflection is different, the airflow trend of the cavity is different, and finally the influence on the airflow pulsation of the exhaust cavity 3 is also different. Moreover, the shape, number and position of the muffling piece 4 have an influence on the exhaust airflow, and different models of compressors may also have different sizes of exhaust cavities 3. Therefore, the shape, number and position of the muffling piece 4 can be determined by experimental monitoring method to minimize the airflow pulsation of different models of compressors or the exhaust cavity 3 of the same compressor, and reduce the exhaust airflow noise.

[0060] During experimental testing, the sensor is connected to the exhaust cavity 3, and a special computer is connected, so that the airflow in the exhaust cavity 3 can be monitored in real time. By using different numbers and positions of the muffling pieces 4, different test results are obtained, and the most suitable muffling scheme for the current compressor is selected after comparative analysis.

[0061] Specifically, by monitoring the airflow in the exhaust cavity 3 in real time during experimental testing, the airflow pulsation peak frequency is observed; the number and position of the muffling piece 4 are changed to change the cavity volume and cavity shape of the exhaust cavity 3, so as to adjust the cavity natural frequency; when the cavity natural frequency reaches the same frequency as the airflow pulsation peak frequency, the cavity resonance effect reaches the maximum, and the airflow is reflected between the two muffling pieces 4 to the greatest extent to reduce the airflow pulsation amplitude in the exhaust cavity 3.

[0062] In practical application, because the application scenarios of the compressor are various, the suction and exhaust pressure ratio (the ratio of the condensation exhaust pressure to the suction evaporation pressure) of the compressor is different, by changing the number and position of the muffling piece 4 in the exhaust cavity 3, the cavity volume and cavity shape of the exhaust cavity 3 can adapt to different pressure ratio application scenarios, and the maximization of the exhaust airflow pulsation reduction and the maximization of the noise reduction and muffling effect in different application scenarios of the compressor are realized.

[0063] Generally, the same compressor operates in one or two relatively close pressure ratio working conditions, so the sound absorbing member 4 is installed in a certain number and position at one time. If the same compressor can operate in two very different pressure ratio working conditions, the number and position of the sound absorbing member that can reduce noise for both pressure ratio working conditions need to be matched, and according to which pressure ratio working condition to be preferentially met, the exhaust gas flow pulsation under the pressure ratio working condition is weakened.

[0064] Different models of compressors can operate in different pressure ratio working conditions. For example, the suction and exhaust pressure ratio of the compressor of a comfort air conditioner is generally 2.2-2.6, the suction and exhaust pressure ratio of the compressor of a heat pump air conditioner is generally 3.0-3.5, and the suction and exhaust pressure ratio of the compressor of a refrigeration and cold storage device is generally 4.2-4.8. The sound absorbing member shape, number and position that can achieve the best noise reduction effect can be matched for different models of compressors.

[0065] The compressor exhaust sound absorbing structure and the compressor provided by the utility model focus on the noise source, the sound absorbing member 4 is arranged on the detachable cavity wall, the cavity volume and the air cavity shape of the exhaust cavity 3 are changed in a targeted manner, the air cavity natural frequency is adjusted, and thus the sound absorbing and noise reduction purposes are achieved.

[0066] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A compressor exhaust muffling structure comprising a casing having an exhaust chamber and an exhaust port, characterized by, The shell comprises fixed cavity walls provided with the exhaust port, and a plurality of detachable cavity walls detachably connected with the fixed cavity walls and surrounding the exhaust cavity, at least one of the detachable cavity walls being provided with at least one sound-absorbing member.

2. The compressor discharge sound attenuation structure of claim 1, wherein Each of the detachable cavity walls is provided with a plurality of reserved mounting holes for mounting the sound-absorbing members.

3. The compressor discharge sound attenuation structure of claim 2, wherein The plurality of detachable cavity walls have different numbers of the reserved mounting holes.

4. The compressor discharge sound attenuation structure of claim 1, wherein Each of the detachable cavity walls is provided with a plurality of the sound-absorbing members, and the surface gap between each two adjacent sound-absorbing members is 5mm-10mm.

5. The compressor discharge sound attenuation structure of claim 1, wherein The sound-absorbing members are in the shape of a cylinder or a cone.

6. The compressor discharge sound attenuation structure of claim 1, wherein The two side walls of the sound-absorbing members are provided with clamping positions for clamping a wrench.

7. The compressor discharge sound attenuation structure of claim 6, wherein The clamping positions are clamping planes.

8. The compressor discharge sound attenuation structure of claim 1, wherein One end of the sound-absorbing members is provided with a fastening stud for threadedly connecting with the detachable cavity walls.

9. A compressor characterized by, A compressor exhaust sound-absorbing structure comprising the shell as claimed in any one of claims 1-8.

10. The compressor of claim 9, wherein, The compressor is a screw compressor.

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