Air suction silencer of totally-enclosed compressor

Abstract

The utility model discloses an air suction silencer of a totally-enclosed compressor, which relates to the field of compressor equipment and particularly comprises a cavity, an air outlet and an air inlet are arranged on the cavity, and a heat insulation cover is arranged on the outer side of the cavity. A heat insulation cavity is formed between the heat insulation cover and the cavity; the heat insulation cavity is of an open structure. The air suction silencer provided by the utility model not only can reduce heat conduction of external heat of the silencer to internal air, improve air suction efficiency and reduce energy consumption, but also can play a role in reducing noise generated by a pump body and other parts in a compressor.

Description

Technical Field

[0001] The utility model relates to the field of compressor equipment, in particular to an air suction muffler of a fully enclosed compressor. Background Art

[0002] In a fully enclosed small compressor, in order to reduce the noise of the compressor, an intake muffler is usually installed inside the compressor to reduce the intake noise of the compressor. The intake muffler is usually a single-wall structure, which mainly reduces the noise of the intake flow channel, the intake valve plate and the cylinder. The noise generated by the pump body and other parts in the compressor, such as mechanical friction noise and electromagnetic noise, will radiate out after multiple oscillations inside the shell. In a fully enclosed small compressor, the gas inside the intake muffler is much lower in temperature than the external gas. Therefore, there is a large heat exchange between the gas inside the silencer cavity and the external gas, causing the gas temperature in the intake cylinder to rise, resulting in overheating of the intake gas, which in turn affects the density of the intake gas, reduces the intake efficiency and increases energy consumption. Summary of the invention

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the utility model provides an intake muffler for a fully enclosed compressor, which can not only reduce the heat conduction of the external heat of the muffler to the internal gas, improve the intake efficiency, and reduce energy consumption, but also play a noise reduction role on the noise generated by the pump body and other parts inside the fully enclosed compressor.

[0004] The utility model is realized through the following technical solutions:

[0005] A suction muffler for a fully enclosed compressor comprises a cavity, the cavity is provided with an air outlet and an air inlet, the outer side of the cavity is provided with a heat insulation cover; a heat insulation cavity is formed between the heat insulation cover and the cavity; the heat insulation cavity is an open structure; in the present technical scheme, the heat insulation cavity can slow down the heat conduction of the external heat of the muffler to the internal gas, avoid the occurrence of suction overheating, and the heat insulation cover is an open structure, the noise generated by the pump body and other parts in the compressor, such as mechanical friction noise and electromagnetic noise, can be easily transmitted to the heat insulation cavity, and reflection and interference phenomena occur in the heat insulation cavity, thereby reducing the capacity of sound waves and achieving a noise reduction effect; it should be noted that in order to maximize the open structure of the heat insulation cover, the open structure is arranged at the bottom of the cavity.

[0006] Preferably, a connecting plate is provided in the insulation cavity, and the connecting plate divides the insulation cavity into a number of unit cavities; in the present technical solution, the connecting plate can enhance the overall structural strength of the lower cavity on the one hand, and on the other hand, the connecting plate is arranged in the insulation cavity, and the insulation cavity can be divided into a number of unit cavities of different sizes, so as to enhance the noise reduction effect on noises of different frequencies, further enhance the reflection and interference of sound waves in the insulation cavity, and improve the noise reduction effect.

[0007] Further preferably, the connecting plate is provided with a through hole, and the through hole connects adjacent unit cavities; in the present technical solution, the vent hole can connect the unit cavities, facilitate the conduction of noise between the unit cavities, and then cause the noise to reflect and interfere in the unit cavity, further improving the noise reduction effect.

[0008] Further preferably, the spacing between the heat insulation cover and the cavity is 0.5~5mm; the spacing between two adjacent connecting plates is 5~100mm; in the present technical solution, the spacing between the heat insulation cover and the cavity is 0.5~5mm, and the spacing between two adjacent connecting plates is 5~100mm. By adaptively setting the size specifications of the heat insulation cavity in practice, the noise reduction effect of the heat insulation cavity can be improved.

[0009] Preferably, the cavity includes an upper cavity and a lower cavity, the lower edge of the upper cavity is provided with a snap-in groove, the upper edge of the lower cavity is provided with a snap-in plate, and the snap-in plate is adapted to the snap-in groove; in the present technical solution, the cavity includes an upper cavity and a lower cavity, and the lower cavity, as a unit with a larger heat-conducting surface, can be provided with a heat insulation cover only on its outer side, so that the heat insulation cover is designed and processed as an integrated whole with the lower cavity, which is convenient for the arrangement of the unit cavity; the snap-in groove and the snap-in plate can facilitate the connection and fixation between the upper cavity and the lower cavity, and the snap-in plate is inserted into the snap-in groove, which can improve the sealing of the connection between the upper cavity and the lower cavity.

[0010] Further preferably, an elastic groove is provided on the lower edge of the upper cavity; in the present technical solution, the elastic groove can provide a deformation space to facilitate the docking and installation of the lower edge of the upper cavity with the upper cavity.

[0011] Further preferably, a partition is provided in the inner cavity of the lower cavity, and the partition divides the inner cavity of the lower cavity into a silencer cavity and an air replenishing cavity; an oil leakage hole is provided at the bottom of the silencer cavity, and an air replenishing channel is provided in the air replenishing cavity; in the present technical scheme, the inner cavity of the lower cavity is divided into a silencer cavity and an air replenishing cavity by the partition, and the air replenishing channel in the air replenishing cavity can make the refrigerant in the compressor enter the suction silencer cavity more quickly, so as to improve the refrigeration efficiency of the compressor; the oil leakage hole can facilitate the timely removal of the lubricating oil entering the muffler.

[0012] Further preferably, a spoiler is provided in the inner cavity of the lower cavity; in the present technical solution, the spoiler can reflect the noise entering the silencer cavity, thereby causing interference of the noise in the silencer cavity to weaken the noise inside the silencer.

[0013] The beneficial effects of the utility model are: 1. A heat insulation cover is provided on the lower cavity of the suction muffler, and a heat insulation cavity is formed between the heat insulation cover and the lower cavity, which can slow down the heat conduction from the external heat of the muffler to the internal gas, thereby improving the suction efficiency and reducing energy consumption; 2. The heat insulation cavity of the suction muffler is an open structure, and a connecting plate is provided in the heat insulation cavity, which divides the heat insulation cavity into a number of longitudinally arranged unit cavities, thereby effectively reducing the noise generated by the pump body and other parts in the compressor; 3. An air supply pipe is provided in the lower cavity of the suction muffler, and the air supply pipe can make the refrigerant in the compressor enter the suction muffler cavity more quickly, so as to improve the refrigeration efficiency of the compressor; the oil leakage hole can facilitate the lubricating oil entering the muffler to be removed in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of a suction muffler of a fully enclosed compressor described in Example 1;

[0015] Figure 2 is a schematic diagram of the three-dimensional structure of the lower cavity described in Example 1;

[0016] Figure 3 It is a schematic diagram of the top view of the lower cavity and the connecting pipe described in the first embodiment;

[0017] Figure 4 It is a schematic cross-sectional structure diagram of the lower cavity and the connecting pipe described in Example 1;

[0018] Figure 5 It is a schematic cross-sectional structural diagram of the upper cavity and the connecting pipe described in Example 1;

[0019] Figure 6 It is a schematic diagram of the front view structure of the upper cavity described in the first embodiment;

[0020] In the figure: 1. upper cavity; 11. air outlet; 12. snap-in groove; 13. positioning plate; 131. right-angle snap-in; 14. elastic slot; 2. lower cavity; 21. air inlet; 22. heat insulation cavity; 221. connecting plate; 222. through hole; 23. partition; 231. through hole; 24. silencer cavity; 241. oil leakage hole; 242. spoiler; 243. positioning step; 25. air supply cavity; 251. air supply channel; 26. snap-in plate; 3. connecting pipe; 31. expansion pipe section; 32. transition pipe section. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the various 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 of 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. Embodiment 1

[0022] like Figures 1 to 6 As shown, a suction muffler of a fully enclosed compressor includes a cavity and a connecting pipe 3 installed in the cavity of the cavity. The cavity includes an upper cavity 1 and a lower cavity 2. The lower edge of the upper cavity 1 is provided with a clamping groove 12, and the upper edge of the lower cavity 2 is provided with a clamping plate 26. The clamping plate 26 is adapted to the clamping groove 12. The cavity is clamped together by the clamping plate 26 and the clamping groove 12 to improve the sealing of the connection between the upper cavity 1 and the lower cavity 2. In order to facilitate the installation of the upper cavity and the lower cavity, an elastic slot 14 is provided on the lower edge of the upper cavity. , to provide deformation space; an air outlet 11 is provided on the top of the upper cavity 1, an air inlet 21 is provided on the side of the lower cavity, and a heat insulation cover is provided on the outer side of the lower cavity 2 having a larger heat dissipation surface; the heat insulation cover is integrally formed with the lower cavity 2, and a heat insulation cavity 22 is formed between the heat insulation cover and the lower cavity; the heat insulation cavity 22 can slow down the heat conduction of the external heat of the muffler to the internal gas, and avoid the occurrence of overheating of the suction air; and the bottom of the heat insulation cavity 22 is an open structure, so that the noise generated by the pump body and other parts in the compressor is conducted therein, and generated in the heat insulation cavity Reflection and interference phenomena are generated, thereby reducing the energy of sound waves and achieving a noise reduction effect; the connecting pipe 3 includes an expansion pipe section 31 and a transition pipe section 32 arranged at the lower end of the expansion pipe section 31; the expansion pipe section 31 is a square tubular structure, and its outlet end corresponds to the air outlet 11, and a gap is provided between the outlet end of the expansion pipe section 31 and the upper cavity; the transition pipe section 32 is a circular tube structure, and its inlet end corresponds to the air inlet, and a gap is provided between the inlet end of the transition pipe section and the lower cavity; in order to optimize the structure and reduce the manufacturing cost, the inner cavity of the lower cavity 2 is A positioning step 243 is provided, and a positioning plate 13 is provided in the inner cavity of the upper cavity 1, and a right-angle bayonet 131 is provided on the positioning plate; the positioning plates 13 are evenly distributed in the middle positions of the four sides of the expansion tube section 31; the expansion tube section 31 is fixed between the right-angle bayonet 131 of the positioning plate and the positioning step 243; the connecting pipe 3 can utilize the multi-stage pressure reduction principle to reduce the noise and vibration caused by gas pulsation to the cavity; it should be noted that, if necessary, a heat insulation cover can also be provided on the outside of the upper cavity 1 to further enhance the heat insulation and noise reduction effect of the suction silencer.

[0023] Preferably, a connecting plate 221 is provided in the heat insulation cavity 22. On the one hand, the connecting plate can enhance the overall structural strength of the lower cavity. On the other hand, the connecting plate is arranged in the heat insulation cavity 22 to divide the heat insulation cavity 22 into a plurality of longitudinally arranged unit cavities, which can further enhance the reflection and interference of sound waves in the heat insulation cavity and improve the noise reduction effect. In order to further improve the noise reduction effect, a through hole 222 is provided on the connecting plate 221. The through hole 222 connects adjacent unit cavities to facilitate the conduction of noise between the unit cavities, thereby causing the noise to reflect and interfere in the unit cavities. Specifically, in the design, the spacing between the heat insulation cover and the lower cavity is 0.5~5mm; the spacing between two adjacent connecting plates is 5~100mm; a partition 23 is provided in the inner cavity of the lower cavity 2, and the partition 23 divides the inner cavity of the lower cavity into a silencer cavity 24 and an air-making cavity 25; an oil leakage hole 241 is provided at the bottom of the silencer cavity 24, and an air-making channel 251 is provided in the air-making cavity 25, and the air-making channel 251 can make the refrigerant in the compressor enter the suction silencer cavity more quickly to improve the refrigeration efficiency of the compressor; the oil leakage hole 241 can facilitate the lubricating oil entering the silencer to be removed in time; further, a spoiler 242 is provided in the silencer cavity 24, and the spoiler 242 can reflect the noise entering the silencer cavity 24, thereby causing the noise to interfere in the silencer cavity to weaken the noise inside the silencer.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solution recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solution from the technical solution of the embodiments of the utility model.

Claims

1. A suction muffler for a fully enclosed compressor, comprising a cavity, wherein the cavity is provided with an air outlet and an air inlet, wherein: A heat insulation cover is arranged on the outside of the cavity; a heat insulation cavity is formed between the heat insulation cover and the cavity; and the heat insulation cavity is an open structure.

2. A suction muffler for a fully enclosed compressor according to claim 1, characterized in that: A connecting plate is arranged in the heat-insulating cavity, and the connecting plate divides the heat-insulating cavity into a plurality of unit cavities.

3. A suction muffler for a fully enclosed compressor according to claim 2, characterized in that: The connecting plate is provided with through holes, and the through holes connect adjacent unit cavities.

4. A suction muffler for a fully enclosed compressor according to claim 2, characterized in that: The distance between the heat shield and the cavity is 0.5-5 mm; the distance between two adjacent connecting plates is 5-100 mm.

5. The suction muffler of a fully enclosed compressor according to claim 1, characterized in that: The cavity comprises an upper cavity and a lower cavity, a clamping groove is arranged at the lower edge of the upper cavity, a clamping plate is arranged at the upper edge of the lower cavity, and the clamping plate is matched with the clamping groove.

6. A suction muffler for a fully enclosed compressor according to claim 5, characterized in that: An elastic groove is arranged on the lower edge of the upper cavity.

7. A suction muffler for a fully enclosed compressor according to claim 5, characterized in that: A partition is provided in the inner cavity of the lower cavity, and the partition divides the inner cavity of the lower cavity into a silencer cavity and an air replenishing cavity; an oil leakage hole is provided at the bottom of the silencer cavity, and an air replenishing channel is provided in the air replenishing cavity.

8. The suction muffler of a fully enclosed compressor according to claim 5, characterized in that: A spoiler is arranged in the inner cavity of the lower cavity.

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