CN115126680A

CN115126680A - Noise suppression structure for refrigeration compressor and use method thereof

Info

Publication number: CN115126680A
Application number: CN202210805170.1A
Authority: CN
Inventors: 李永达; 李嘉钦; 余有发; 梁鑫
Original assignee: Zhejiang Bolaite Refrigeration Equipment Co ltd
Current assignee: Zhejiang Bolaite Refrigeration Equipment Co ltd
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2022-09-30
Anticipated expiration: 2042-07-08
Also published as: NL2033390B1; CN115126680B

Abstract

The invention discloses a noise suppression structure for a refrigeration compressor and a using method thereof. The sound insulation coating I and the sound insulation coating II can protect and insulate the mechanical noise emitted from the right side of the compression device, the sound absorption sleeve can reduce the noise of the motor through the sound insulation coating, and the silent fan and the concave sleeve can reduce the temperature of the junction box and the sound absorption sleeve through the one-way air valve and the refrigerating sheet.

Description

Noise suppression structure for refrigeration compressor and use method thereof

Technical Field

The invention relates to the technical field of refrigeration compressors, in particular to a noise suppression structure for a refrigeration compressor and a using method thereof.

Background

The refrigeration compressor is the core and heart of the refrigeration system, and the capacity and characteristics of the compressor determine the capacity and characteristics of the refrigeration system, in a sense, the design and matching of the refrigeration system reflects the capacity of the compressor.

In the use process of the refrigeration compressor, noise reduction can not be carried out, the motor and each moving part are easy to generate noise, and noise pollution is caused to the surrounding environment, so that the use of a user is influenced.

Therefore, the refrigeration compressor needs to be designed and modified, so that the phenomenon that the noise reduction treatment cannot be carried out on the refrigeration compressor, the noise is easily generated by the motor and each moving part, and the noise pollution is caused to the surrounding environment is effectively prevented.

Disclosure of Invention

In order to solve the problems in the background art, the invention aims to provide a noise suppression structure for a refrigeration compressor and a use method thereof, which have the advantage of good noise reduction effect and solve the problems that the noise reduction processing cannot be performed in the use process of the refrigeration compressor, the noise is easily generated by a motor and each moving part, and the noise pollution is caused to the surrounding environment.

In order to achieve the purpose, the invention provides the following technical scheme: the noise suppression structure for the refrigeration compressor comprises a compression device, wherein a motor box is fixedly connected to the left side of the compression device, a junction box is communicated with the left side of the motor box, a sound absorption sleeve is fixedly connected to the surface of the motor box, a first sound insulation coating is fixedly connected to the surface of the sound absorption sleeve and the right side of the compression device, and a second sound insulation coating located on the right side of the compression device is fixedly connected to the surface of the first sound insulation coating;

inhale the inside fixed the inlaying of sound cover and have one-way air valve, one-way air valve's bottom intercommunication has the three-way pipe, the left side intercommunication of three-way pipe bottom is at the top of terminal box, the bottom intercommunication of terminal box has the blast pipe, one-way air valve's top intercommunication has the silence fan, the fixed surface of silence fan is connected with spill cover, the fixed refrigeration piece that inlays in top of spill cover, inhale the left side of sound cover and seted up the round hole, inhale the left side of sound cover and have the circle cover through bearing swing joint, the top and the equal fixedly connected with micropore abatvoix in bottom of circle cover inner wall.

Preferably, the top of the sound absorption sleeve is fixedly connected with a water tank through a connecting plate, and the water tank is fixedly connected to the surface of the refrigerating sheet.

Preferably, the damp-proof mechanism is arranged inside the round sleeve and comprises a first half-round piece, a second half-round piece and a drying box, the first half-round piece is fixedly connected to the right side of the bottom of the inner wall of the round sleeve, the second half-round piece is fixedly connected to the bottom of the inner wall of the round hole, the drying box is fixedly embedded inside the first half-round piece, and dry particles are filled inside the drying box.

Preferably, the left side of the sound absorption sleeve is provided with a control mechanism, the control mechanism comprises a control box, the control box is fixedly connected to the left side of the sound absorption sleeve, a processor is arranged inside the control box, the input end of the processor is electrically connected with a voltage sensor, the input end of the processor is electrically connected with an electricity storage module, the output end of the processor is electrically connected with a time control switch, the output end of the time control switch is electrically connected with a motor, the motor is fixedly connected inside the control box, and the output end of the motor penetrates through the left side of the control box and is in transmission connection with the round sleeve through a gear.

Preferably, the input end of the processor is electrically connected with a display controller in a bidirectional mode, the display controller is a touch screen, and the time control switch is a microcomputer time control switch.

Preferably, the input end of the electricity storage module is electrically connected with a power supply module, the power supply module is a plug, and the electricity storage module is a storage battery.

Preferably, the two sides of the inner cavity of the concave sleeve are vertically and fixedly connected with partition plates, and the partition plates are positioned on the inner sides of the refrigerating sheets.

Preferably, the top of the left side of the sound-absorbing sleeve is fixedly connected with an air guide sleeve through a connecting plate, the air guide sleeve is sleeved on the surface of the round sleeve, and one end, far away from the round sleeve, of the air guide sleeve extends to the top of the water tank.

Preferably, the water tank is made of heat conducting materials, the right side of the air guide sleeve is fixedly connected with a bearing seat, the inner wall of the bearing seat is fixedly connected with the surface of the round sleeve, the first sound-insulating coating is made of sepiolite fiber sound-absorbing paint, and the second sound-insulating coating is made of sound-absorbing emulsion paint.

Preferably, the method comprises the following steps:

s1: firstly, a motor box is started through a control device and a junction box which are arranged outside, a motor in the motor box is subjected to air compression treatment through a compression device, a first sound insulation coating and a second sound insulation coating can protect and insulate mechanical noise emitted from the right side of the compression device, meanwhile, a sound absorption sleeve is subjected to noise reduction treatment on the motor noise through the sound insulation coatings, and then S2 is executed;

s2: starting the mute fan, injecting external air into the junction box and the sound-absorbing sleeve by the mute fan through the concave sleeve and the one-way air valve, so that the air exchanges heat and cools the interior of the junction box, heat accumulation is prevented, the air flowing speed in the sound-absorbing sleeve can be improved, the heat-exchanged air is discharged through the round sleeve and the round hole, meanwhile, the microporous sound-absorbing board can prevent noise from being transmitted out through the round sleeve, and then S3 is executed;

s3: start the refrigeration piece, the bottom of refrigeration piece can refrigerate the cooling, and the refrigeration piece then can be cooled down the temperature to the air and handle, makes the inside air temperature who gets into the terminal box reduce, has improved cooling and noise reduction effect.

Compared with the prior art, the invention has the following beneficial effects:

1. the sound insulation coating I and the sound insulation coating II can protect and insulate the mechanical noise emitted from the right side of the compression device, the sound absorption sleeve can reduce the noise of the motor through the sound insulation coating, and the silent fan and the concave sleeve can reduce the temperature of the junction box and the sound absorption sleeve through the one-way air valve and the refrigerating sheet.

2. According to the invention, the water tank is arranged, so that the top of the refrigerating sheet can be cooled through water, and the service life and the refrigerating effect of the refrigerating sheet are improved.

3. According to the invention, the moisture-proof mechanism is arranged, so that the interior of the sound-absorbing sleeve can be subjected to moisture-proof treatment, and the phenomenon that dust and moisture easily enter the interior of the sound-absorbing sleeve when the compression device is not used is avoided.

4. The control mechanism is arranged, so that the timing control switch processing can be performed on the round sleeve, and the phenomenon that a user needs to manually rotate the round sleeve, and the switch is easily forgotten is avoided.

5. According to the invention, the display controller is arranged, so that a user can conveniently control the time control switch, and the user can conveniently observe the voltage condition.

6. According to the invention, the power supply module is arranged, so that the power storage module can be charged, and the phenomenon that the power storage module is easy to have insufficient electric quantity is avoided.

7. According to the invention, through arranging the partition plate, air can be blocked, the contact effect of the refrigerating sheet and the air is improved, and the refrigerating efficiency is further improved.

8. The air guide sleeve is arranged, so that the air discharged by the round sleeve can be guided, and the air can conveniently cool the water in the water tank.

9. According to the invention, the bearing seat is arranged, so that the left side of the round sleeve can be supported, and the stability and the supporting strength of the round sleeve are improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 1;

FIG. 4 is a left side view of the first half-round piece of the present invention;

FIG. 5 is a system diagram of the structural control mechanism of the present invention;

fig. 6 is a perspective cross-sectional view of a structural female sleeve of the present invention.

In the figure: 1. a compression device; 2. a motor case; 3. a junction box; 4. a sound absorbing sleeve; 5. a first sound insulation coating; 6. a second sound insulation coating; 7. a one-way air valve; 8. a three-way pipe; 9. an exhaust pipe; 10. a mute fan; 11. a concave sleeve; 12. a refrigeration plate; 13. a circular hole; 14. a round sleeve; 15. a microporous acoustic panel; 16. a water tank; 17. a moisture-proof mechanism; 171. a first semicircular sheet; 172. a second semicircular plate; 173. drying the box; 18. a control mechanism; 181. a control box; 182. a processor; 183. a voltage sensor; 184. an electricity storage module; 185. a time control switch; 186. a motor; 19. a display controller; 20. a power supply module; 21. a partition plate; 22. a gas guide sleeve; 23. and a bearing seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 6, the noise suppression structure for a refrigeration compressor and the use method thereof provided by the invention comprise a compression device 1, wherein a motor box 2 is fixedly connected to the left side of the compression device 1, a junction box 3 is communicated with the left side of the motor box 2, a sound absorption sleeve 4 is fixedly connected to the surface of the motor box 2, a sound insulation coating layer one 5 is fixedly connected to the surface of the sound absorption sleeve 4 and the right side of the compression device 1, and a sound insulation coating layer two 6 positioned on the right side of the compression device 1 is fixedly connected to the surface of the sound insulation coating layer one 5;

inhale the inside fixed of sound cover 4 and inlay and have one-way air valve 7, the bottom intercommunication of one-way air valve 7 has three-way pipe 8, the left side intercommunication of three-way pipe 8 bottom is at the top of terminal box 3, the bottom intercommunication of terminal box 3 has blast pipe 9, the top intercommunication of one-way air valve 7 has silence fan 10, the fixed surface of silence fan 10 is connected with spill cover 11, the fixed refrigeration piece 12 that inlays in top of spill cover 11, inhale the left side of sound cover 4 and seted up round hole 13, there is round cover 14 in the left side of sound cover 4 through bearing swing joint, the top and the equal fixedly connected with micropore abatvoix 15 in bottom of the inner wall of round cover 14.

Referring to fig. 3, a water tank 16 is fixedly connected to the top of the sound-absorbing cover 4 through a connecting plate, and the water tank 16 is fixedly connected to the surface of the refrigerating sheet 12.

As a technical optimization scheme of the invention, the water tank 16 is arranged, so that the top of the refrigeration piece 12 can be cooled by water, and the service life and the refrigeration effect of the refrigeration piece 12 are improved.

Referring to fig. 2, the moisture-proof mechanism 17 is arranged inside the round sleeve 14, the moisture-proof mechanism 17 includes a first half-disc 171, a second half-disc 172 and a drying box 173, the first half-disc 171 is fixedly connected to the right side of the bottom of the inner wall of the round sleeve 14, the second half-disc 172 is fixedly connected to the bottom of the inner wall of the round hole 13, the drying box 173 is fixedly embedded inside the first half-disc 171, and the drying box 173 is filled with dry particles.

As a technical optimization of the present invention, the moisture-proof mechanism 17 is provided to perform moisture-proof treatment on the inside of the sound-absorbing cover 4, thereby preventing dust and moisture from easily entering the inside of the sound-absorbing cover 4 when the compression device 1 is not in use.

Referring to fig. 5, a control mechanism 18 is arranged on the left side of the sound-absorbing sleeve 4, the control mechanism 18 includes a control box 181, the control box 181 is fixedly connected to the left side of the sound-absorbing sleeve 4, a processor 182 is arranged inside the control box 181, an input end of the processor 182 is electrically connected to a voltage sensor 183, an input end of the processor 182 is electrically connected to an electricity storage module 184, an output end of the processor 182 is electrically connected to a time switch 185, an output end of the time switch 185 is electrically connected to a motor 186, the motor 186 is fixedly connected to the inside of the control box 181, and an output end of the motor 186 penetrates through the left side of the control box 181 and is in transmission connection with the round sleeve 14 through a gear.

As a technical optimization scheme of the invention, the control mechanism 18 is arranged, so that the round sleeve 14 can be subjected to timing control switch processing, and the phenomenon that a user needs to manually rotate the round sleeve 14 and forgets to switch the round sleeve is easily avoided.

Referring to fig. 5, the input terminal of the processor 182 is electrically connected to the display controller 19 in both directions, the display controller 19 is a touch panel, and the time switch 185 is a microcomputer time switch 185.

As a technical optimization scheme of the present invention, the display controller 19 is provided, so that the user can conveniently control the time control switch 185 and can conveniently observe the voltage condition.

Referring to fig. 5, the input end of the power storage module 184 is electrically connected to the power supply module 20, the power supply module 20 is a plug, and the power storage module 184 is a storage battery.

As a technical optimization scheme of the present invention, by providing the power supply module 20, the power storage module 184 can be charged, so that the phenomenon that the power storage module 184 is prone to have insufficient electric quantity is avoided.

Referring to fig. 3, two sides of the inner cavity of the concave sleeve 11 are vertically and fixedly connected with a partition plate 21, and the partition plate 21 is located on the inner side of the refrigerating sheet 12.

As a technical optimization scheme of the invention, the partition plate 21 is arranged, so that air can be blocked, the contact effect of the refrigerating sheet 12 and the air is improved, and the refrigerating efficiency is further improved.

Referring to fig. 2, an air guide sleeve 22 is fixedly connected to the top of the left side of the sound-absorbing sleeve 4 through a connecting plate, the air guide sleeve 22 is sleeved on the surface of the round sleeve 14, and one end of the air guide sleeve 22 far away from the round sleeve 14 extends to the top of the water tank 16.

As a technical optimization scheme of the present invention, the air guide sleeve 22 is provided to guide the air discharged from the circular sleeve 14, so as to facilitate the air to cool the water in the water tank 16.

Referring to fig. 2, the water tank 16 is made of a heat conductive material, the right side of the air guide sleeve 22 is fixedly connected with a bearing seat 23, the inner wall of the bearing seat 23 is fixedly connected with the surface of the round sleeve 14, the first sound-proof coating 5 is made of sepiolite fiber sound-absorbing paint, and the second sound-proof coating 6 is made of sound-absorbing latex paint.

As a technical optimization scheme of the invention, the bearing seat 23 is arranged to support the left side of the round sleeve 14, so that the stability and the supporting strength of the round sleeve 14 are improved.

Referring to fig. 1, the following steps are included:

s1: firstly, a motor box 2 is started through an external control device and a junction box 3, a motor in the motor box 2 is subjected to air compression treatment through a compression device 1, a first sound insulation coating 5 and a second sound insulation coating 6 can protect and insulate mechanical noise emitted from the right side of the compression device 1, meanwhile, a sound absorption sleeve 4 is subjected to noise reduction treatment on the motor noise through the first sound insulation coating 5, and then S2 is executed;

s2: starting the mute fan 10, injecting outside air into the junction box 3 and the sound-absorbing sleeve 4 by the mute fan 10 through the concave sleeve 11 and the one-way air valve 7, so that the air exchanges heat and cools the inside of the junction box 3, heat accumulation is prevented, meanwhile, the air flowing speed in the sound-absorbing sleeve 4 can be improved, the heat-exchanged air is discharged through the round sleeve 14 and the round hole 13, meanwhile, the microporous sound-absorbing plate 15 can prevent noise from being transmitted out through the round sleeve 14, and then S3 is executed;

s3: start refrigeration piece 12, the cooling can be carried out to the bottom of refrigeration piece 12, and refrigeration piece 12 then can be cooled down the temperature and handle the air, makes the inside air temperature that gets into terminal box 3 reduce, has improved cooling and noise reduction effect.

The working principle and the using process of the invention are as follows: when the air compressor is used, a user firstly starts the motor box 2 through the peripheral control equipment and the junction box 3, the motor in the motor box 2 performs air compression treatment through the compression device 1, the first sound insulation coating 5 and the second sound insulation coating 6 can protect and insulate mechanical noise emitted from the right side of the compression device 1, meanwhile, the sound absorption sleeve 4 performs noise reduction treatment on the motor noise through the first sound insulation coating 5, then the silent fan 10 is started, the silent fan 10 injects outside air into the junction box 3 and the sound absorption sleeve 4 through the concave sleeve 11 and the one-way air valve 7, so that the air performs heat exchange and temperature reduction on the inside of the junction box 3, heat accumulation is prevented, meanwhile, the air flowing speed in the sound absorption sleeve 4 can be improved, the heat-exchanged air is discharged through the round sleeve 14 and the round hole 13, meanwhile, the micropore sound absorption plate 15 can prevent the noise from being transmitted out through the round sleeve 14, and then the refrigerating sheet 12 is started, the bottom of refrigeration piece 12 can refrigerate the cooling, refrigeration piece 12 then can cool down the processing to the air, make the inside air temperature who gets into terminal box 3 reduce, cooling and noise reduction effect have been improved, when not using, the user closes motor case 2, voltage sensor 183 can detect voltage, when detecting the outage, treater 182 passes through time switch 185 and accumulate module 184 starter motor 186, motor 186 then can drive the rotatory one hundred eighty degrees of circle cover 14, then treater 182 closes motor 186, half disc one 171 and two 172 of half disc carry out sealing process to circle cover 14, dry box 173 then can carry out dry dehumidification processing to the inside of sound absorption cover 4, thereby reach the good advantage of noise reduction effect.

In summary, the following steps: this noise suppression structure for compressor and its operation method, can protect the sound insulation by sound insulation coating one 5 and sound insulation coating two 6 to the mechanical noise that compressor arrangement 1 right side gived off and handle, again by inhaling sound cover 4 and carrying out noise reduction treatment through sound insulation coating one 5 to the motor noise, at last by silence fan 10 and spill cover 11 through one-way air valve 7 and refrigeration piece 12 to terminal box 3 with inhale sound cover 4 and carry out the cooling treatment, thereby possessed the advantage that noise reduction effect is good, in the compressor use has been solved, can't carry out noise reduction treatment, motor and each moving part produce the noise easily, and cause noise pollution's problem to the surrounding environment.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although 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 alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A noise suppressing structure for a refrigeration compressor and a method of using the same, comprising a compression device (1), characterized in that: the left side of the compression device (1) is fixedly connected with a motor box (2), the left side of the motor box (2) is communicated with a junction box (3), the surface of the motor box (2) is fixedly connected with a sound-absorbing sleeve (4), the surface of the sound-absorbing sleeve (4) and the right side of the compression device (1) are both fixedly connected with a first sound-insulating coating (5), and the surface of the first sound-insulating coating (5) is fixedly connected with a second sound-insulating coating (6) positioned on the right side of the compression device (1);

inhale the inside fixed of sound cover (4) and inlay and have one-way air valve (7), the bottom intercommunication of one-way air valve (7) has three-way pipe (8), the left side intercommunication of three-way pipe (8) bottom is at the top of terminal box (3), the bottom intercommunication of terminal box (3) has blast pipe (9), the top intercommunication of one-way air valve (7) has silence fan (10), the fixed surface of silence fan (10) is connected with spill cover (11), the fixed refrigeration piece (12) of inlaying in top of spill cover (11), round hole (13) have been seted up in the left side of inhaling sound cover (4), there is round cover (14) in the left side of inhaling sound cover (4) through bearing swing joint, the equal fixedly connected with micropore abatvoix (15) in top and bottom of round cover (14) inner wall.

2. The structure of claim 1, wherein the structure is used for suppressing noise of a refrigeration compressor, and the method of using the structure is characterized in that: inhale the top of sound cover (4) and pass through connecting plate fixedly connected with water tank (16), water tank (16) fixed connection is on the surface of refrigeration piece (12).

3. The structure of claim 1, wherein the structure is used for suppressing noise of a refrigeration compressor, and the method of using the structure is characterized in that: the inside of circle cover (14) is provided with dampproofing mechanism (17), dampproofing mechanism (17) includes half-round piece (171), half-round piece two (172) and dry box (173), half-round piece (171) fixed connection is on the right side of circle cover (14) inner wall bottom, half-round piece two (172) fixed connection is in the bottom of round hole (13) inner wall, dry box (173) are fixed to be inlayed in the inside of half-round piece (171), the inside packing of dry box (173) has dry granule.

4. The structure of claim 1, wherein the structure is used for suppressing noise of a refrigeration compressor, and the method of using the structure is characterized in that: inhale the left side of sound cover (4) and be provided with control mechanism (18), control mechanism (18) are including control box (181), control box (181) fixed connection is in the left side of inhaling sound cover (4), the inside of control box (181) is provided with treater (182), voltage sensor (183) are connected to the input electricity of treater (182), the input electricity of treater (182) is connected with accumulate module (184), the output electricity of treater (182) is connected with time control switch (185), the output electricity of time control switch (185) is connected with motor (186), motor (186) fixed connection is in the inside of control box (181), the output of motor (186) runs through to the left side of control box (181) and is connected with circle cover (14) transmission through the gear.

5. The structure of claim 4, wherein the structure is used for suppressing noise of a refrigeration compressor, and the method of using the structure is characterized in that: the input end of the processor (182) is electrically connected with a display controller (19) in a bidirectional mode, the display controller (19) is a touch screen, and the time control switch (185) is a microcomputer time control switch (185).

6. The structure of claim 4, wherein the structure is used for suppressing noise of a refrigeration compressor, and the method of using the structure is characterized in that: the input end electricity of accumulate module (184) is connected with power module (20) electrically, power module (20) are the plug, accumulate module (184) are the battery.

7. The structure of claim 1, wherein the structure is used for suppressing noise of a refrigeration compressor, and the method of using the structure is characterized in that: the both sides of concave cover (11) inner chamber all vertical fixedly connected with baffle (21), baffle (21) are located the inboard of refrigeration piece (12).

8. The structure of claim 2, wherein the structure is used for suppressing noise of a refrigeration compressor, and the method of using the structure is characterized in that: inhale the left top of sound cover (4) and pass through connecting plate fixedly connected with air guide sleeve (22), air guide sleeve (22) cover is established on the surface of circle cover (14), the one end that circle cover (14) were kept away from in air guide sleeve (22) extends to the top of water tank (16).

9. The structure for suppressing noise in a refrigeration compressor and the method for using the same according to claim 2, wherein: the water tank (16) is made by the heat conduction material, the right side fixedly connected with bearing frame (23) of air guide sleeve (22), the inner wall of bearing frame (23) is connected with the fixed surface of circle cover (14), sound insulation coating (5) are made by sepiolite fibre sound absorption coating, sound insulation coating two (6) are made by inhaling the sound emulsion paint.

10. The structure for suppressing noise in a refrigeration compressor and the method for using the same according to claim 1, wherein: the method comprises the following steps:

s1: the method comprises the following steps that firstly, a motor box (2) is started through an external control device and a junction box (3), a motor in the motor box (2) is subjected to air compression treatment through a compression device (1), a sound insulation coating I (5) and a sound insulation coating II (6) can protect and insulate mechanical noise emitted from the right side of the compression device (1), meanwhile, a sound absorption sleeve (4) is subjected to noise reduction treatment on the motor noise through the sound insulation coating I (5), and then S2 is executed;

s2: starting the mute fan (10), injecting external air into the junction box (3) and the sound-absorbing sleeve (4) by the mute fan (10) through the concave sleeve (11) and the one-way air valve (7), so that the air exchanges heat and cools the inside of the junction box (3), heat accumulation is prevented, the air flowing speed in the sound-absorbing sleeve (4) can be increased, the heat-exchanged air is discharged through the round sleeve (14) and the round hole (13), meanwhile, the micropore sound-absorbing plate (15) can prevent noise from being transmitted out through the round sleeve (14), and then S3 is executed;

s3: start refrigeration piece (12), the bottom of refrigeration piece (12) can refrigerate the cooling, and refrigeration piece (12) then can be cooled down the processing to the air, makes the inside air temperature who gets into terminal box (3) reduce, has improved cooling and noise reduction effect.