Refrigeration equipment

Abstract

The utility model discloses a refrigeration equipment relates to household electrical appliance technical field, refrigeration equipment includes machinery room, compressor, sound transmission subassembly, loudspeaker and control module, compressor is provided in machinery room, sound transmission subassembly is provided in machinery room, sound transmission subassembly includes microphone and noise reduction structure, microphone is close to compressor one end has sound receiving portion, loudspeaker and control module one end has the sound receiving portion. The noise reduction structure covers a partial area of the outer side of the sound receiving part, the loudspeaker is arranged in the mechanical chamber, the control module is connected to the microphone and the loudspeaker, and the control module is configured to control the loudspeaker to generate a sound signal with the phase opposite to that of a noise signal according to the noise signal generated by the compressor and received by the sound receiving part. According to the refrigeration equipment, the situation that sound except noise signals generated by the compressor disturbs the microphone to obtain the noise signals can be reduced, then the sound feedback phenomenon of the microphone can be reduced, and therefore the noise reduction effect can be remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a refrigeration device. Background Art

[0002] A compressor is installed in the mechanical room of refrigeration equipment such as refrigerators. In order to reduce the noise generated by the compressor, such as the noise generated when the compressor is placed in front, an active noise reduction system is installed in the mechanical room in the relevant technology. The active noise reduction system includes a microphone, a speaker and a control module. The microphone obtains the noise signal generated by the compressor. The control module analyzes the noise signal and controls the speaker to generate a sound signal with a phase opposite to the noise signal, thereby offsetting the noise signal and achieving the purpose of active noise reduction.

[0003] However, it was found during use that when noise reduction is being performed, other sounds (such as the sound produced by the speaker) would interfere with the microphone in obtaining the noise signal produced by the compressor, causing acoustic feedback in the microphone, which seriously affects the noise reduction effect. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a refrigeration device that can reduce other sounds interfering with the microphone to obtain the noise signal generated by the compressor, avoid the microphone from having sound feedback, and thus significantly improve the noise reduction effect.

[0005] According to the refrigeration equipment of the embodiment of the utility model, it includes a mechanical room, a compressor, a sound transmission component, a speaker and a control module, the compressor is arranged in the mechanical room, the sound transmission component is arranged in the mechanical room, the sound transmission component includes a microphone and a noise reduction structure, the microphone has a sound receiving part at one end close to the compressor, the noise reduction structure covers a partial area outside the sound receiving part, the speaker is arranged in the mechanical room, the control module is connected to the microphone and the speaker, and the control module is configured to: according to the noise signal generated by the compressor received by the sound receiving part, control the speaker to generate a sound signal with a phase opposite to the noise signal.

[0006] The refrigeration device according to the embodiment of the utility model has at least the following beneficial effects:

[0007] The noise reduction structure can cover the outside of the direction where the sound receiving part is disturbed by noise. For example, it can cover the outside of the side of the sound receiving part close to the speaker. The area on the outside of the sound receiving part that is not covered by the noise reduction structure forms a sound transmission area. The noise signal generated by the compressor can be normally acquired by the sound receiving part through the sound transmission area. The control module analyzes the noise signal and controls the speaker to generate a sound signal with a phase opposite to the noise signal, thereby offsetting the noise signal and achieving the purpose of active noise reduction. The noise reduction structure has a noise reduction function and can reduce other sounds. For example, the sound generated by the speaker interferes with the microphone acquiring the noise signal generated by the compressor, thereby avoiding acoustic feedback in the microphone, thereby significantly improving the noise reduction effect.

[0008] According to some embodiments of the present invention, the sound transmission component further includes a magnetic body, the magnetic body is connected to the microphone, and the magnetic body is adsorbed on the surface of the compressor.

[0009] According to some embodiments of the utility model, the magnetic body includes an annular portion and an end wall, the end wall is arranged at one end of the annular portion close to the compressor, the annular portion and the end wall are surrounded to form a sleeve hole, the sound receiving portion is inserted into the sleeve hole, and the end wall is provided with an opening connected to the sleeve hole.

[0010] According to some embodiments of the present invention, the openings are provided in plurality and are arranged at intervals along the circumference of the magnetic body.

[0011] According to some embodiments of the present invention, the sound transmission component further includes a heat insulation layer, and the heat insulation layer is arranged between the inner wall of the annular portion and the outer wall of the sound receiving portion.

[0012] According to some embodiments of the present invention, the noise reduction structure is arranged in a ring shape and surrounds the outer peripheral side of the sound receiving part.

[0013] According to some embodiments of the present invention, the noise reduction structure extends to surround the outer circumference of the magnetic body.

[0014] According to some embodiments of the present invention, an end surface of the noise reduction structure close to the compressor is flush with an end surface of the magnetic body close to the compressor.

[0015] According to some embodiments of the present invention, the front end of the machinery room has a front cover plate, and the microphone and the speaker are located between the compressor and the front cover plate.

[0016] According to some embodiments of the utility model, the end surface of the front cover plate close to the compressor forms a mounting surface, the speaker is arranged on the mounting surface, and the distance between the edge of the mounting surface closest to the speaker and the projection of the speaker on the mounting surface is L, satisfying: L≥3cm.

[0017] According to some embodiments of the utility model, the front end of the machinery room is provided with a front cover plate, and a sound absorbing layer and / or a sound insulating layer is attached to a side of the front cover plate close to the compressor.

[0018] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of a refrigeration device according to the utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the interior of the central machinery room;

[0022] Figure 3 for Figure 2 Schematic diagram of the structure of the sound transmission component;

[0023] Figure 4 This is a schematic diagram of the separation of the magnetic body, the heat insulation layer and the microphone;

[0024] Figure 5 for Figure 4 Schematic diagram of the structure of the magnetic body;

[0025] Figure 6 It is a structural schematic diagram of the front cover;

[0026] Figure 7 This is a control schematic diagram of the control module.

[0027] Figure Number:

[0028] Mechanical room 100; front cover 110; sound absorbing layer 111; first mounting seat 112; second mounting seat 113;

[0029] Compressor 200;

[0030] Sound transmission component 300; microphone 310; sound receiving part 311; noise reduction structure 320; magnetic body 330; annular part 331; end wall 332; opening 333; heat insulation layer 340;

[0031] Speaker 400;

[0032] Control module 500;

[0033] Condensing fan 600;

[0034] Box 700;

[0035] Freezer 800;

[0036] Refrigerator 900. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, inside, outside, top, bottom, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In the description of the present utility model, "a plurality" refers to two or more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] Refrigeration equipment such as refrigerators are generally equipped with a mechanical room, which is used to install compressors, condensing fans, condensers, control modules and other equipment. The compressor will generate noise during operation, especially when the compressor is front-mounted, that is, when the compressor is located on the front side of the refrigeration equipment, the noise generated by the compressor can easily pass through the front cover of the mechanical room and affect the user experience. For the high-frequency noise generated by the compressor, sound insulation materials can be set to isolate it. However, when the motor of the compressor is at a high speed, for example, the speed is greater than 3600rpm, the compressor is prone to fundamental frequency resonance problems, and then generates low-frequency noise in the frequency band between 50Hz and 200Hz. The sound wavelength of low-frequency noise is long and has strong penetration, and it is difficult to isolate it with general sound insulation materials.

[0042] In order to reduce the noise generated by the compressor, especially the low-frequency noise, an active noise reduction system is installed in the machine room in the relevant technology. The active noise reduction system includes a microphone, a speaker and a control module. The microphone obtains the noise signal generated by the compressor. The control module analyzes the noise signal and controls the speaker to generate a sound signal with a phase opposite to the noise signal, thereby offsetting the noise signal and achieving the purpose of active noise reduction.

[0043] However, during use, it was found that in addition to the compressor, the speakers and condensing fans in the mechanical room also produce sounds, which will interfere with the microphone in obtaining the noise signal generated by the compressor. In addition, the side walls of the mechanical room generally have heat dissipation holes or air outlets, and the sound generated by the environment outside the mechanical room may also interfere with the microphone in obtaining the noise signal generated by the compressor, which can easily lead to acoustic feedback in the microphone, thereby affecting the active noise reduction effect of the active noise reduction system.

[0044] Therefore, the utility model proposes a refrigeration device, which can effectively improve the above problems.

[0045] Reference below Figures 1 to 7 A refrigeration device according to an embodiment of the utility model is described.

[0046] like Figures 1 to 3 as well as Figure 7 As shown, the refrigeration device according to the embodiment of the utility model includes a mechanical room 100, a compressor 200, a sound transmission component 300, a speaker 400 and a control module 500.

[0047] Among them, the mechanical room 100 is arranged on the refrigeration equipment, for example, it can be arranged at the bottom of the refrigeration equipment, and the mechanical room 100 has an installation cavity, and the installation cavity is used to install the compressor 200. In addition, the installation cavity can also be used to install the condensing fan 600, the condenser, the control module 500 or other required equipment.

[0048] The compressor 200 is arranged in the mechanical room 100. The main function of the compressor 200 is to suck in low-temperature and low-pressure refrigerant, compress the refrigerant by driving the piston or the scroll through the operation of the motor, increase the temperature and pressure of the refrigerant, and then discharge it to form a high-temperature and high-pressure refrigerant. The compressor 200 can be a rotary compressor, a scroll compressor or other suitable compressor 200, which will not be described here. The compressor 200 can be located at the front side of the refrigeration equipment. In this case, the noise generated by the compressor 200 has a greater impact on the user, and is particularly suitable for setting an active noise reduction system. Of course, the compressor 200 can also be located at other suitable positions of the refrigeration equipment. When it is at other positions, an active noise reduction system can also be set.

[0049] The sound-transmitting assembly 300 is arranged in the machine room 100. The number of the sound-transmitting assembly 300 can be one, two or more, for example, one. The sound-transmitting assembly 300 includes a microphone 310 and a noise reduction structure 320. The microphone 310 is an energy conversion device that converts a sound signal into an electrical signal. The microphone 310 can be a dynamic microphone, a condenser microphone, an electret microphone or other suitable types of microphones 310. The microphone 310 has a sound receiving portion 311 at one end close to the compressor 200, and the sound receiving portion 311 is used to receive the noise generated by the compressor 200. The noise reduction structure 320 covers a partial area outside the sound receiving portion 311, for example, it can cover the outside of the side of the sound receiving portion 311 close to the speaker 400, or cover the outside of the side of the sound receiving portion 311 close to the condensing fan 600. The noise reduction structure 320 may be made of sound absorbing material or sound insulating material, such as sound absorbing cotton or sound insulating cotton, and the noise reduction structure 320 may also be provided with a structure capable of sound insulation or sound absorption, such as a sound-absorbing hole, a sound-absorbing labyrinth, a sound insulation board, etc. The noise reduction structure 320 can reduce the transmission of some other sounds except the noise generated by the compressor 200 to the sound receiving part 311, such as reducing the transmission of the sound generated by the speaker 400 or the condensing fan 600 to the sound receiving part 311, and the noise signal generated by the compressor 200 can be transmitted to the sound receiving part 311 through the area outside the sound receiving part 311 that is not covered by the noise reduction structure 320.

[0050] The loudspeaker 400 is disposed in the machine room 100. The number of the loudspeakers 400 may be one, two or more. For example, there may be one loudspeaker 400. The loudspeaker 400 may correspond to the microphone 310 one by one. Of course, the loudspeaker 400 may not correspond to the microphone 310. The loudspeaker 400 is an energy conversion device that can convert an electrical signal into a sound signal. The loudspeaker 400 may be a dynamic loudspeaker, a capacitive loudspeaker, a reed loudspeaker, a piezoelectric loudspeaker or other suitable types of loudspeakers 400.

[0051] The control module 500 can be arranged in the machine room 100, or can be arranged outside the machine room 100, for example, arranged on the box body 700 of the refrigeration equipment, and the control module 500 is connected to the microphone 310 and the speaker 400. The control module 500 is configured to: according to the noise signal generated by the compressor 200 received by the sound receiving unit 311, control the speaker 400 to generate a sound signal with a phase opposite to the noise signal. That is, the microphone 310 receives the noise signal generated by the compressor 200, and converts the noise signal into an electrical signal and transmits it to the control module 500. The control module 500 controls the operation of the speaker 400 according to the electrical signal input by the microphone 310, and the speaker 400 then generates a sound signal with a phase opposite to the noise signal.

[0052] In this embodiment, the noise reduction structure 320 can cover the outside of the direction where the sound receiving part 311 is disturbed by noise, for example, it can cover the outside of the side of the sound receiving part 311 close to the speaker 400. The area on the outside of the sound receiving part 311 not covered by the noise reduction structure 320 forms a sound transmission area. The noise signal generated by the compressor 200 can be normally acquired by the sound receiving part 311 through the sound transmission area. The control module 500 analyzes the noise signal and controls the speaker 400 to generate a sound signal with a phase opposite to the noise signal, thereby offsetting the noise signal and achieving the purpose of active noise reduction. The noise reduction structure 320 has a noise reduction function and can reduce other sounds. For example, the sound generated by the speaker 400 interferes with the microphone 300 acquiring the noise signal generated by the compressor 200, thereby avoiding the occurrence of acoustic feedback in the microphone 300, thereby significantly improving the noise reduction effect.

[0053] It is understandable that the refrigeration device can be a refrigerator, a freezer, a safe, etc. Taking the refrigerator as an example, the refrigeration device can also include a box body 700, and the box body 700 can be provided with a freezing chamber 800 and a refrigerating chamber 900. Of course, other chambers can also be provided, such as a storage chamber at room temperature, etc. The machine room 100 can be provided at the bottom of the box body 700. Of course, the machine room 100 can also be provided at other positions of the box body 700, which will not be repeated here.

[0054] It is understandable that, in addition to being able to generate a sound signal with a phase opposite to that of the noise signal, the speaker 400 may also generate a small amount of other sound signals, but the purpose of active noise reduction can still be achieved. Secondly, the sound signal generated by the speaker 400 with a phase opposite to that of the noise signal may have an amplitude equal to the amplitude of the noise signal, thereby achieving a better noise reduction effect. Of course, the amplitude of the sound signal may also be slightly larger or slightly smaller than the amplitude of the noise signal, and the purpose of active noise reduction can still be achieved. In addition, in addition to emitting a low-frequency sound signal to offset the low-frequency noise generated by the compressor 200, the speaker 400 may also emit a high-frequency sound signal to offset the high-frequency noise generated by the compressor 200.

[0055] It should be noted that the control module 500 may be provided with a filter, which can effectively filter out the interference signal input from the microphone 310 to the control module 500. For example, the noise signal generated by other devices and received by the microphone 310 can be effectively filtered out, so that the sound signal generated by the speaker 400 controlled by the control module 500 is purer, and the active noise reduction effect is better. The filter may be an adaptive filter, which can automatically adjust the filter parameters according to the input signal, so that the difference between the output signal and the expected signal, that is, the mean square value of the error signal is minimized, so as to obtain the optimal output signal, thereby achieving a better noise reduction effect. The adaptive filter can be calculated using the LMS algorithm, that is, the least mean square algorithm. When there are multiple microphones 310, the adaptive filter can also use other suitable algorithms, such as a single-channel FXLMS algorithm or a multi-channel FXLMS algorithm. The adaptive filter is a more common type of filter, and the LMS algorithm, the single-channel FXLMS algorithm and the multi-channel FXLMS algorithm are all more common algorithms, which will not be described in detail here.

[0056] refer to Figures 3 to 5 As shown, in some embodiments of the present invention, the sound-transmitting assembly 300 further includes a magnetic body 330, which is connected to the microphone 310 and is adsorbed on the surface of the compressor 200. For example, the magnetic body 330 may be connected to an end of the sound receiving portion 311 of the microphone 310 close to the compressor 200, and the magnetic body 330 may be adsorbed on the surface of the compressor 200, for example, it may be adsorbed on the side of the compressor 200 where the nameplate is provided, thereby not only being able to simply and conveniently realize the installation and positioning of the microphone 310, but also being able to install the microphone 310 at different positions of the compressor 200 according to actual needs, and in addition being able to make the sound receiving portion 311 of the microphone 310 closer to the compressor 200, so that the sound receiving portion 311 of the microphone 310 can receive the noise signal generated by the compressor 200 better.

[0057] It should be noted that the magnetic body 330 can also be connected to other positions of the microphone 310, such as the middle position of the microphone 310. The microphone 310 can also be connected to the compressor 200 in other ways, for example, it can also be connected to the compressor 200 by fasteners or bonded to the compressor 200. In addition, the microphone 310 can also be connected to other positions in the machine room 100, for example, it can be arranged on the front cover 110 of the machine room 100, and the side of the front cover 110 close to the compressor 200 can be provided with a first mounting seat 112, and the first mounting seat 112 is provided with a first slot, and the end of the microphone 310 away from the compressor 200 is inserted into the first slot. In this case, the end of the microphone 310 close to the compressor 200 can be adsorbed on the compressor 200 by the magnetic body 330, so that the microphone 310 is installed more firmly. Of course, the end of the microphone 310 close to the compressor 200 can also be not fixed.

[0058] refer to Figure 4 and Figure 5 As shown, in a further embodiment of the present invention, the magnetic body 330 includes an annular portion 331 and an end wall 332, the end wall 332 is provided at one end of the annular portion 331 close to the compressor 200, the annular portion 331 and the end wall 332 are enclosed to form a sleeve hole, the end of the sound receiving portion 311 close to the compressor 200 is inserted into the sleeve hole, and the end wall 332 is provided with an opening 333 connected to the sleeve hole. For example, the annular portion 331 can be a circular ring or a shape close to a circular ring, the outer side wall of the end of the sound receiving portion 311 close to the compressor 200 can be a cylindrical surface or a cylindrical surface close to a cylindrical surface, and the end of the sound receiving portion 311 close to the compressor 200 is inserted into the annular portion 331 in cooperation.

[0059] In this embodiment, the magnetic body 330 is plugged into the sound receiving part 311 through the annular part 331, thereby realizing the installation of the magnetic body 330. The disassembly and assembly of the magnetic body 330 is simple and convenient, and it is more convenient to clean, repair or replace the magnetic body 330. In addition, an end wall 332 is provided at one end of the magnetic body 330 close to the compressor 200, so that the magnetic body 330 is closely adsorbed on the surface of the compressor 200, so that the microphone 310 is installed more firmly. In addition, the end wall 332 is provided with an opening 333 connected to the sleeve hole, so that the noise signal generated by the compressor 200 is convenient to be transmitted to the sound receiving part 311 of the microphone 310 through the opening 333 and the sleeve hole, so that the noise reduction effect is better.

[0060] It should be noted that the magnetic body 330 may also be connected to the microphone 310 in other ways, for example, it may be connected to the microphone 310 by bonding, welding, or by fasteners.

[0061] refer to Figure 5As shown, in a further embodiment of the present invention, a plurality of openings 333 are provided and arranged at intervals along the circumference of the magnetic body 330. In this embodiment, a plurality of openings 333 are provided and arranged at intervals along the circumference of the magnetic body 330, which not only enables the noise signal generated by the compressor 200 to be more evenly transmitted to the sound receiving part 311 of the microphone 310, but also a portion of the end wall 332 of the magnetic body 330 exists between two adjacent openings 333, thereby ensuring the adsorption effect of the magnetic body 330 and not affecting the installation firmness of the microphone 310. It should be noted that only one opening 333 may be provided, for example, it may be provided in the shape of a circular hole and located in the middle of the end wall 332 of the magnetic body 330.

[0062] refer to Figure 5 As shown, in a further embodiment of the present invention, along the axial direction of the magnetic body 330, the projection of the opening 333 can be triangular, the opening 333 can extend along the radial direction of the magnetic body 330, and the width of the opening 333 can gradually increase from the axis of the magnetic body 330 to the outer wall of the magnetic body 330. Such a configuration can increase the area of ​​the opening 333, thereby improving the noise signal transmission effect, and can also avoid connecting two adjacent openings 333, thereby ensuring that the magnetic body 330 is stably adsorbed on the surface of the compressor 200.

[0063] refer to Figure 4 As shown, in some embodiments of the present invention, the sound transmission component 300 further includes a heat insulation layer 340, and the heat insulation layer 340 is disposed between the inner side wall of the annular portion 331 and the outer side wall of the sound receiving portion 311. For example, the heat insulation layer 340 can be made of heat insulation materials such as heat insulation cotton, and the heat insulation layer 340 can be set as an annular structure, the inner side wall of the heat insulation layer 340 is matched with the outer side wall of the sound receiving portion 311, the inner side wall of the annular portion 331 is matched with the outer side wall of the heat insulation layer 340, the heat insulation layer 340 is matched with the outer side wall of the sound receiving portion 311, and the annular portion 331 of the magnetic body 330 is matched with the outer side wall of the heat insulation layer 340.

[0064] In this embodiment, a heat insulating layer 340 is provided to reduce the heat generated during the operation of the compressor 200 and transferred to the microphone 310 through the magnetic body 330, thereby not only preventing the microphone 310 from being damaged due to excessive temperature, but also preventing the microphone 310 from being affected in its sensitivity to receiving noise signals due to excessive temperature, thereby making the microphone 310 better at receiving noise signals, thereby improving the active noise reduction effect.

[0065] refer to Figure 3As shown, in some embodiments of the present invention, the noise reduction structure 320 is arranged in a ring shape and surrounds the outer peripheral side of the sound receiving portion 311. For example, the inner side wall of the noise reduction structure 320 may be in contact with the outer side wall of the sound receiving portion 311, and there may be a gap between the inner side wall of the noise reduction structure 320 and the outer side wall of the sound receiving portion 311.

[0066] In this embodiment, the noise reduction structure 320 surrounds the outer peripheral side of the sound receiving part 311. The noise reduction structure 320 does not cover the end surface of the sound receiving part 311 close to the compressor 200. The sound receiving part 311 can normally obtain the noise signal generated by the compressor 200. The noise reduction structure 320 can reduce the interference of the sounds generated by the speaker 400, the condensing fan 600, the condenser and the external environment around the microphone 310, and avoid these sounds affecting the microphone 310 to obtain noise signals, thereby further reducing the acoustic feedback phenomenon of the microphone 310, thereby further improving the noise reduction effect.

[0067] refer to Figure 3 As shown, in a further embodiment of the present invention, the noise reduction structure 320 extends to the outer peripheral side surrounding the magnetic body 330. In this embodiment, part of the noise reduction structure 320 surrounds the outer peripheral side of the magnetic body 330, and then the gap at the connection between the magnetic body 330 and the sound receiving part 311 is located in the noise reduction structure 320, so that the sound generated by the speaker 400, the condensing fan 600, the condenser and the external environment around the microphone 310 can be prevented from passing through the gap between the magnetic body 330 and the sound receiving part 311 and being received by the sound receiving part 311, thereby further reducing the interference of the sound generated by the speaker 400, the condensing fan 600, the condenser and the external environment on the microphone 310 to obtain the noise signal, further reducing the acoustic feedback phenomenon of the microphone 310, and further improving the noise reduction effect.

[0068] refer to Figure 3As shown, in a further embodiment of the present invention, the end surface of the noise reduction structure 320 close to the compressor 200 is flush with the end surface of the magnetic body 330 close to the compressor 200 . In this embodiment, after the magnetic body 330 is adsorbed on the surface of the compressor 200, the end surface of the noise reduction structure 320 close to the compressor 200 is attached to the surface of the compressor 200. Such a configuration can not only reduce the sound generated by the speaker 400, the condensing fan 600, the condenser and the external environment on the side of the microphone 310 from passing through the gap between the magnetic body 330 and the surface of the compressor 200 to enter the sound receiving part 311 of the microphone 310, but also reduce the sound generated by the speaker 400, the condensing fan 600, the condenser and the external environment on the side of the microphone 310 from passing through the gap between the noise reduction structure 320 and the magnetic body 330 to enter the sound receiving part 311 of the microphone 310, thereby further reducing the interference of the sound generated by the speaker 400, the condensing fan 600, the condenser and the external environment, further avoiding these sounds from affecting the microphone 310 in acquiring noise signals, further reducing the acoustic feedback phenomenon of the microphone 310, and thus further improving the noise reduction effect.

[0069] refer to Figure 2 and Figure 6 As shown, in some embodiments of the present invention, the front end of the machine room 100 has a front cover plate 110, and a sound absorbing layer 111 is attached to the side of the front cover plate 110 close to the compressor 200. The front end of the machine room 100 is generally directly exposed to the outside, so that maintenance personnel can open the machine room 100 to repair the equipment in the machine room 100, and the noise generated by the compressor 200 can easily pass through the front cover plate 110 and affect the user, while the outside of other directions of the machine room 100 is blocked by the box body 700, and the noise impact is small.

[0070] In this embodiment, a sound-absorbing layer 111 is attached to the side of the front cover 110 close to the compressor 200. The sound-absorbing layer 111 is made of sound-absorbing materials such as sound-absorbing cotton, which can effectively absorb noise, thereby reducing the noise generated by the compressor 200 from passing through the front cover 110 and affecting the user, thereby further improving the user experience.

[0071] It should be noted that the side of the front cover plate 110 close to the compressor 200 may also be provided with a sound insulation layer, and the side of the front cover plate 110 close to the compressor 200 may also be provided with both a sound absorbing layer 111 and a sound insulation layer, and the sound insulation layer may be made of sound insulation materials such as sound insulation cotton. In addition, other inner walls of the machine room 100 may also be provided with a sound absorbing layer 111 and / or a sound insulation layer, so as to further reduce noise.

[0072] refer to Figure 2As shown, in some embodiments of the present invention, the front end of the machine room 100 has a front cover plate 110, and the microphone 310 and the speaker 400 are located between the compressor 200 and the front cover plate 110. The low-frequency noise generated by the compressor 200 mainly passes through the front cover plate 110 and affects the user experience. The microphone 310 is arranged between the compressor 200 and the front cover plate 110, which makes it easier for the microphone 310 to receive the noise signal generated by the compressor 200. The speaker 400 is arranged between the compressor 200 and the front cover plate 110, which makes it easier for the speaker 400 to generate a sound signal with a phase opposite to the noise signal generated by the compressor 200 and reduce the noise, thereby achieving a better noise reduction effect. Moreover, the microphone 310 and the speaker 400 are located at the front side of the machine room 100, which makes it easier for personnel to disassemble and assemble the microphone 310 and the speaker 400.

[0073] It should be noted that the microphone 310 and the speaker 400 may also be located at other positions in the machinery room 100 , which will not be described in detail herein.

[0074] refer to Figure 2 and Figure 6 As shown, in some embodiments of the present invention, the end surface of the front cover plate 110 close to the compressor 200 forms a mounting surface, the speaker 400 is arranged on the mounting surface, and the distance between the edge of the mounting surface closest to the speaker 400 and the projection of the speaker 400 on the mounting surface is L, satisfying: L ≥ 3 cm. For example, a second mounting seat 113 may be provided on the mounting surface of the front cover plate 110, and the second mounting seat 113 is provided with a second slot, and the end of the speaker 400 away from the compressor 200 is inserted into the second slot, and the distance L between the edge of the mounting surface closest to the speaker 400 and the projection of the speaker 400 on the mounting surface may be 3 cm, 4 cm, 5 cm, 6 cm, etc.

[0075] In this embodiment, the speaker 400 is arranged on the front cover plate 110, and the speaker 400 can be disassembled by disassembling the front cover plate 110, which makes it more convenient to disassemble the speaker 400. The distance between the edge of the installation surface closest to the speaker 400 and the projection of the speaker 400 on the installation surface is L, which satisfies: L ≥ 3cm. In this way, not only can the speaker 400 be prevented from interfering with the installation of the front cover plate 110, making the installation of the front cover plate 110 more convenient, but also the speaker 400 itself can be installed more conveniently and stably. In addition, the speaker 400 is closer to the compressor 200, and the noise reduction effect is better.

[0076] It can be understood that the distance between the edge of the mounting surface closest to the speaker 400 and the projection of the speaker 400 on the mounting surface mentioned in this embodiment is L. For example, when the speaker 400 is close to the left side of the mounting surface, it means that the distance between the edge of the left side of the mounting surface and the projection of the speaker 400 on the mounting surface is L. When the speaker 400 is close to the right side of the mounting surface, it means that the distance between the edge of the right side of the mounting surface and the projection of the speaker 400 on the mounting surface is L. When the speaker 400 is close to the top of the mounting surface, it means that the distance between the edge of the top of the mounting surface and the projection of the speaker 400 on the mounting surface is L. When the speaker 400 is close to the bottom of the mounting surface, it means that the distance between the edge of the bottom of the mounting surface and the projection of the speaker 400 on the mounting surface is L. In addition, when the speaker 400 is close to the corner of the mounting surface, for example, close to the upper left corner of the mounting surface, the distances between the edges of the left side and the top of the mounting surface and the projection of the speaker 400 on the mounting surface may both be L.

[0077] It should be noted that the microphone 310 can also be connected to the front cover 110, so that it is more convenient to disassemble and assemble the microphone 310. In addition, the speaker 400 and the microphone 310 can also be connected to other positions of the machine room 100, such as the bottom wall or top wall of the machine room 100, which will not be repeated here.

[0078] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A refrigeration device, characterized in that: include: Mechanical room; A compressor, arranged in the machinery room; A sound transmission component is arranged in the machine room, the sound transmission component includes a microphone and a noise reduction structure, the microphone has a sound receiving part at one end close to the compressor, and the noise reduction structure covers a part of the area outside the sound receiving part; A loudspeaker, arranged in the machinery room; A control module is connected to the microphone and the speaker, and is configured to control the speaker to generate a sound signal having a phase opposite to that of the noise signal according to the noise signal generated by the compressor received by the sound receiving unit.

2. The refrigeration equipment according to claim 1, characterized in that: The sound transmission component further includes a magnetic body, which is connected to the microphone and adsorbed on the surface of the compressor.

3. The refrigeration equipment according to claim 2, characterized in that: The magnetic body includes an annular portion and an end wall, wherein the end wall is arranged at one end of the annular portion close to the compressor, the annular portion and the end wall are combined to form a sleeve hole, the sound receiving portion is inserted into the sleeve hole, and the end wall is provided with an opening connected to the sleeve hole.

4. The refrigeration equipment according to claim 3, characterized in that: The openings are provided in plurality and are arranged at intervals along the circumference of the magnetic body.

5. The refrigeration equipment according to claim 3, characterized in that: The sound transmission component further includes a heat insulation layer, which is arranged between the inner side wall of the annular portion and the outer side wall of the sound receiving portion.

6. The refrigeration device according to any one of claims 2 to 5, characterized in that: The noise reduction structure is arranged in a ring shape and surrounds the outer peripheral side of the sound receiving part.

7. The refrigeration device according to claim 6, characterized in that: The noise reduction structure extends to surround the outer peripheral side of the magnetic body.

8. The refrigeration device according to claim 7, characterized in that: An end surface of the noise reduction structure close to the compressor is flush with an end surface of the magnetic body close to the compressor.

9. The refrigeration device according to any one of claims 1 to 5, characterized in that: The front end of the machine room is provided with a front cover plate, and the microphone and the speaker are both located between the compressor and the front cover plate.

10. The refrigeration device according to claim 9, characterized in that: The end surface of the front cover plate close to the compressor forms a mounting surface, the speaker is arranged on the mounting surface, and the distance between the edge of the mounting surface closest to the speaker and the projection of the speaker on the mounting surface is L, which satisfies: L≥3cm.

11. The refrigeration device according to any one of claims 1 to 5, characterized in that: The front end of the machine room is provided with a front cover plate, and a sound absorbing layer and / or a sound insulating layer is attached to a side of the front cover plate close to the compressor.

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