CN212081761U

CN212081761U - Refrigerator with compressor cabin capable of actively reducing noise

Info

Publication number: CN212081761U
Application number: CN202020446689.1U
Authority: CN
Inventors: 孙敬龙; 潘毅广; 丁龙辉; 张海鹏
Original assignee: Hisense Shandong Refrigerator Co Ltd
Current assignee: Hisense Shandong Refrigerator Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-12-04
Anticipated expiration: 2030-03-31

Abstract

The application discloses refrigerator that compression cabin initiatively falls and makes an uproar includes: the compressor comprises a box body, wherein a compressor cabin is arranged at the bottom of the box body; the compressor nacelle comprises: the supporting plate is arranged at the bottom of the compressor cabin, and the front side surface of the supporting plate is abutted against the front side wall of the compressor cabin; a compressor mounted on the support plate; the rear cover plate is arranged at the rear part of the compressor cabin, and the rear cover plate, the supporting plate and the inner side wall of the compressor cabin form a closed cavity; the rear cover plate is respectively provided with a microphone and a loudspeaker, the refrigerator main control board is provided with a control module, and the microphone and the loudspeaker are respectively in signal connection with the control module so as to realize active noise reduction of the closed cavity. On one hand, a closed cavity is formed by the rear cover plate, the supporting plate and the inner side wall of the compressor cabin, so that noise generated by all parts in the compressor cabin is isolated, and the reduction of the running noise of the whole machine and the improvement of the sound quality are realized; on the other hand, the microphone, the loudspeaker and the control module are used for realizing active noise reduction of the closed compression cabin, so that a good noise reduction effect is realized.

Description

Refrigerator with compressor cabin capable of actively reducing noise

Technical Field

The application relates to the technical field of refrigerators, in particular to a refrigerator with an active noise reduction function in a compression cabin.

Background

The refrigerator is a refrigerating device for keeping constant low temperature, and is a civil product for keeping food or other articles in a constant low-temperature cold state. The box body is internally provided with a compressor, a cabinet or a box for making ice by an ice maker and a storage box with a refrigerating device. The refrigerator usually generates noise when working, the noise is mainly generated when the compressor runs, certain influence is caused on life rest of people, and particularly the rest of people is influenced at night.

Noise of each component in the compressor cabin is accompanied with the whole operation period of the refrigerator, and the noise of the whole machine needs to be reduced firstly. Current noise reduction techniques include: passive noise reduction and active noise reduction technologies, wherein the passive noise reduction mainly adopts sound absorption and insulation materials and a sound absorption structure to isolate noise; the active noise reduction adopts a sound wave phase reversal technology to generate sound with opposite noise phases to offset noise, and has good effect on low-frequency noise and high-frequency noise.

However, passive noise reduction has an obvious effect on high-frequency noise but an unobvious effect on low-frequency noise, and low-frequency noise has a long sound wave and a strong penetration capability, so that a user often has a pressing feeling; however, the active noise reduction technology is still in single-point noise reduction, and noise reduction in a spatial range cannot be realized.

SUMMERY OF THE UTILITY MODEL

The application provides a refrigerator that compression cabin initiatively fallen noise to it is not obvious to solve the compression cabin noise reduction effect of present refrigerator, influences the problem that the user used and experienced.

In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:

the embodiment of the application discloses refrigerator that compression cabin initiatively falls and makes an uproar includes:

the compressor comprises a box body, wherein a compressor cabin is arranged at the bottom of the box body; the compressor nacelle includes:

the supporting plate is arranged at the bottom of the compressor cabin, and the front side surface of the supporting plate is abutted against the front side wall of the compressor cabin;

a compressor mounted on the support plate;

the rear cover plate is arranged at the rear part of the compressor cabin, and the rear cover plate, the supporting plate and the inner side wall of the compressor cabin form a closed cavity; wherein,

the rear cover plate is respectively provided with a microphone and a loudspeaker, the refrigerator main control panel is provided with a control module, and the microphone and the loudspeaker are respectively in signal connection with the control module so as to realize active noise reduction of the closed cavity.

Compared with the prior art, the beneficial effect of this application is:

on one hand, the front side surface of the supporting plate is abutted against the front side wall of the compression cabin, so that a closed cavity is formed by the rear cover plate, the supporting plate and the inner side wall of the compression cabin, the compression cabin is sealed, vibration noises of a compressor body, an air suction and exhaust pipe and bottom air cooler in the compression cabin are isolated, and the operation noise reduction and the sound quality improvement of the whole machine are realized; on the other hand, install microphone and speaker respectively on the back shroud, set up control module on the refrigerator main control panel, the microphone, the speaker is respectively with control module signal connection, wherein, the microphone is used for gathering compression cabin noise, and transmit the noise to control module, control module carries out phase analysis to noise sound wave signal, thereby control speaker produces with the "anti-noise" of compression cabin noise antiphase, "anti-noise" superposes with compression cabin noise, can offset compression cabin noise, thereby can realize the initiative of airtight cavity and fall the noise, realize good noise reduction effect.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an exemplary NPS problem proportion diagram;

FIG. 2 is a schematic diagram of a refrigerator for actively reducing noise of a compressor cabin according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a compressor nacelle in a refrigerator for actively reducing noise of the compressor nacelle according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a rear cover plate in a refrigerator for actively reducing noise of a compressor cabin according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a bracket in a refrigerator for actively reducing noise of a compressor cabin according to an embodiment of the present application;

FIG. 6 is an assembly diagram of a rear cover plate and a bracket in a refrigerator for actively reducing noise of a compressor cabin according to an embodiment of the present disclosure;

FIG. 7 is a schematic view illustrating an assembly of a rear cover plate and a microphone in a refrigerator for actively reducing noise of a compressor cabin according to an embodiment of the present disclosure;

FIG. 8 is a schematic assembly diagram of a rear cover plate and a speaker in a refrigerator for actively reducing noise of a compressor cabin according to an embodiment of the present disclosure;

FIG. 9 is an assembly diagram of a rear cover plate and a refrigerator body in the refrigerator for actively reducing noise of the compressor cabin according to the embodiment of the present application;

FIG. 10 is an enlarged view taken at A in FIG. 9;

fig. 11 is a schematic control diagram of active noise reduction in a refrigerator for actively reducing noise of a compressor cabin according to an embodiment of the present application.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of 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 thus, should not be construed as limiting the present invention.

Refrigerator noise is a key influencing factor of product competitiveness, and is obtained from market NPS feedback data in 2019, and the complaint rate of compressor and pipeline noise in a compressor cabin is the highest, as shown in FIG. 1. Noise of all parts in the compressor cabin is accompanied with the whole operation period of the refrigerator, so that the noise of the whole refrigerator is reduced, and the noise in the compressor cabin needs to be reduced firstly. Current noise reduction techniques include: the passive noise reduction and active noise reduction technology mainly adopts sound absorption and insulation materials and a sound absorption structure to insulate noise, and if the local noise reduction method of the compressor is as follows: 1. the damping material is pasted and mounted, so that the noise is reduced; 2. the starting program of the compressor is optimized, and abnormal starting noise is avoided; 3. the refrigerant filling amount is optimized, and the noise of the compressor is reduced; the noise reduction method of the suction and exhaust pipe is that damping cotton is arranged on the suction and exhaust pipe to reduce vibration and noise; the noise suppression method of the compressor cabin is that sound absorption cotton is stuck at the position of the rear cover plate of the compressor cabin corresponding to the compressor; the noise suppression method of the bottom air cooler is to paste damping cotton around the fan bracket. The fact proves that passive noise reduction has obvious effect on high-frequency noise but not low-frequency noise, and low-frequency noise has long sound wave and strong penetrating power, so that users often have a pressing feeling.

In order to solve the problem of low-frequency noise, an active noise reduction technology is developed, and the active noise reduction technology adopts a sound wave phase inversion technology to generate sound with opposite noise phases so as to offset noise, so that the active noise reduction device has a good effect on low-frequency and high-frequency noise. However, the existing active noise reduction technology is still in single-point noise reduction, and noise reduction in a space range cannot be realized, and the installation of a sensor and a loudspeaker for active noise reduction cannot be realized in the structural design form of the existing compression engine room.

In order to solve the above problems, the embodiment of the present application provides a refrigerator with an active noise reduction function in a compressor cabin, wherein on one hand, the reduction of the running noise of the whole refrigerator and the improvement of the sound quality are realized by isolating the vibration noise of a compressor body, an air suction and exhaust pipe and the noise of a bottom air cooler; and on the other hand, the active noise reduction technology is applied to noise reduction of the compressor cabin so as to achieve good noise reduction effect.

As shown in fig. 2, in the refrigerator provided by the embodiment of the present application, the refrigerator may include a cabinet 10 having low-temperature storage compartments, which may include a refrigerating compartment 20, a wild vegetable compartment 30, and a freezing compartment 40, the refrigerating compartment 20 may keep food in a refrigerated state, the wild vegetable compartment 30 may keep green food stored at an adapted temperature, and the freezing compartment 40 may keep food in a frozen state. The refrigerator compartment 20 may be formed at an upper side of the wild vegetable compartment 30, and the wild vegetable compartment 30 may be formed at an upper side of the freezer compartment 40.

Partitions can be arranged among the refrigerating chamber 20, the wild vegetable chamber 30 and the freezing chamber 40, namely, the partitions are arranged among the refrigerating chamber 20 and the wild vegetable chamber 30, and the partitions are arranged among the wild vegetable chamber 30 and the freezing chamber 40 so as to store food conveniently.

In this example, the bottom of the box 10 is provided with a compressor compartment disposed at the rear side of the freezing compartment 40, but the location of the compressor compartment is not limited thereto, and it may be located at the top of the box 10 or other locations, as the case may be. The compressor compartment also contains a compressor, a fan, an air intake and exhaust pipe, a bottom air cooler, and other devices, which are generally known to those skilled in the art and will not be described herein.

As shown in fig. 3 and 4, the compressor cabin includes a support plate 2, a compressor 1 and a rear cover plate 4, wherein the support plate 2 is arranged at the bottom of the compressor cabin and plays a role of support; the compressor 1 is arranged on the supporting plate; the rear cover plate 4 is provided at the rear of the compressor compartment. When the compressor cabin is assembled, the compressor 1 is firstly installed and fixed on the supporting plate 2, then the supporting plate 2 is placed in the compressor cabin, and then the rear cover plate 4 is installed and fixed at the rear part of the compressor cabin, so that a cavity is formed by the supporting plate 2, the inner wall of the compressor cabin and the rear cover plate 4 and is used for preventing the compressor, the fan, the air suction and exhaust pipe, the bottom air cooler and other devices.

Original compressor cabin is not the totally enclosed space, there is certain space about 8cm between the preceding lateral wall (inside wall) in compressor cabin and the compressor cabin, and the initiative is fallen and is fallen the leakproofness that needs to realize the compressor cabin of making an uproar, consequently this application can be with the preceding lateral wall antedisplacement in compressor cabin when producing for the side of backup pad 2 is inconsistent with the preceding lateral wall in compressor cabin, does not have the space between so compressor cabin inner wall and the backup pad, form airtight cavity through back shroud 4, backup pad 2 and the inboard wall in compressor cabin, can realize the leakproofness in compressor cabin.

In order to realize the tightness of the compressor cabin, a shielding plate 3 may be provided between the front side wall of the compressor cabin and the compressor 1, the size of the shielding plate 3 is the same as that of the front side wall of the compressor cabin, and the rear side surface of the shielding plate 3 is in contact with the front side surface of the support plate 2, so that a closed cavity is formed by the shielding plate 3, the support plate 2, the rear cover plate 4 and the inner side wall of the compressor cabin, thereby realizing the tightness of the compressor cabin.

After the airtightness of the compressor cabin is realized, the noises such as the vibration noise of the compressor body, the air suction and exhaust pipe, the noise of the bottom air cooler and the like in the compressor cabin can be isolated, and the reduction of the running noise of the whole machine and the improvement of the sound quality are realized.

After the sealing of the compressor cabin is realized, an active noise reduction technology can be applied in the sealed compressor cabin, the active noise control is a technology based on the sound wave coherent superposition principle, and the basic principle is that a secondary sound source is introduced into a sound field and is used for emitting 'anti-noise' with the same amplitude as the initial noise but opposite phase, so that the initial noise is coherently counteracted, and the purpose of noise suppression is achieved. Specifically, a microphone and a loudspeaker are respectively installed on the rear cover plate 4, a control module is arranged on the refrigerator main control board, the microphone and the loudspeaker are respectively in signal connection with the control module, the microphone is used for collecting noise of the compression cabin and transmitting the noise to the control module, the control module performs phase analysis on a noise sound wave signal and controls the loudspeaker to generate 'anti-noise' opposite to the phase of the noise of the compression cabin, the anti-noise is used for offsetting the noise of the compression cabin, and therefore active noise reduction of the closed compression cabin is achieved.

In order to facilitate the installation of the microphone and the speaker, as shown in fig. 4, an air inlet 41 and an air outlet 42 are respectively disposed at the left and right sides of the rear cover plate 4, and the microphone and the speaker are installed at the air inlet 41 and the air outlet 42. This application has cancelled the design of original discrete formula's back shroud business turn over wind gap, sets up the square business turn over wind gap that length and width is 8cm in 4 both sides of back shroud, and the purpose of this design is the installation that realizes the microphone and the speaker of initiatively falling noise.

In this example, the shapes of the air inlet 41 and the air outlet 42 are not limited to the square openings, but may be other shapes, such as circular openings, as long as they can mount a microphone and a speaker, which all fall within the protection scope of the embodiments of the present application.

In this example, the sizes of the intake opening 41 and the exhaust opening 42 are not limited to 8 sides, and the sizes of the intake opening 41 and the exhaust opening 42 may be determined according to the size of the rear cover plate 4.

To further facilitate the installation of the microphone and the speaker, as shown in fig. 5 and 6, the air inlet 41 and the air outlet 42 of the rear cover plate 4 are respectively embedded in the bracket 5, and the microphone and the speaker can be installed on the bracket 5, that is, the microphone and the speaker are installed on the rear cover plate 4 through the bracket 5.

In this example, the support 5 may be composed of 4 hollow sub-frames, the hollows of the sub-frames are air inlets and air outlets, and a mounting hole 51 is provided at the center of the support 5, and the microphone and the speaker are mounted on the support 5 through the mounting hole 51.

In this example, the structure of the bracket 5 is not limited to the above-mentioned plurality of hollow sub-frames, as long as there are air inlets and air outlets, and the bracket can be installed on the air inlet 41 and the air outlet 42 of the rear cover plate 4, and can be installed with a microphone and a speaker, which all belong to the protection scope of the embodiment of the present application.

Specifically, as shown in fig. 7, at the air inlet 41 of the rear cover plate 4, a bracket 5 is embedded in the air inlet 41, and the microphone 6 is mounted on one side of the bracket 5 close to the compressor 1, that is, the microphone 6 is mounted on the inner side of the rear cover plate 4, and is used for collecting a noise signal of the compressor cabin. Similarly, at the air outlet 42 of the rear cover plate 4, the air outlet 42 is embedded with the bracket 5, and the microphone 6 is installed at one side of the bracket 5 close to the compressor 1, that is, the microphone 6 is installed at the inner side of the rear cover plate 4 and used for collecting the noise signal of the compressor cabin.

As shown in fig. 8, at the air inlet 41 of the rear cover plate 4, the air inlet 41 is embedded with the bracket 5, and the speaker 7 is installed at a side of the bracket 5 away from the compressor 1, that is, the speaker 7 is installed at an outer side of the rear cover plate 4, for generating sound waves in phase opposition to the compressor compartment noise. Similarly, at the air outlet 42 of the back cover plate 4, the air outlet 42 is embedded with the bracket 5, and the speaker 7 is installed at one side of the bracket 5 far away from the compressor 1, that is, the speaker 7 is installed at the outer side of the back cover plate 4, and is used for generating sound waves in phase opposition to the noise of the compressor cabin.

In order to further facilitate the installation of the microphone 6 and the speaker 7, a support is embedded in the installation hole 51 at the center of the bracket 5, and the microphone 6 and the speaker 7 are respectively installed at the inner side and the outer side of the support. That is, the microphone 6 and the speaker 7 are respectively installed at both sides of the stand, and then the stand is snap-fitted into the installation hole 51 at the center position of the bracket 5 such that the microphone 6 is directed to the inside of the back cover plate 4 and the speaker 7 is directed to the outside of the back cover plate 4.

After the microphone 6 and the speaker 7 are mounted on the inner and outer sides of the rear cover 4, respectively, as shown in fig. 9 and 10, the rear cover 4 may be fixed to the rear side of the cabinet 10 by screws, thereby fixing the rear cover 4. In this example, the rear cover plate 4 is fixed to the bottom rear side of the box 10, that is, the compressor compartment is located at the bottom rear side of the box 10, and after the rear cover plate 4 is fixed to the box 10, the rear cover plate 4, the support plate 2 and the compressor compartment form a closed cavity.

In addition, after the microphone 6 and the speaker 7 are respectively installed on the inner side and the outer side of the rear cover plate 4, as shown in fig. 11, the microphone 6 and the speaker 7 need to be respectively connected with a control module on a main control panel of the refrigerator, so that noise of the compression cabin collected by the microphone 6 can be transmitted to the control module on the main control panel, the control module analyzes and calculates sound waves and amplitude of the noise of the compression cabin, and then controls the speaker 7 to generate 'anti-noise' with opposite phase and same amplitude as the noise of the compression cabin, and superimposes the 'anti-noise' with the noise of the compression cabin to offset the noise of the compression cabin, thereby achieving the purpose of noise reduction. The verification proves that the active noise reduction method can realize the noise reduction of the compressor cabin by 3-4 dB.

In summary, the installation process of the compressor cabin in the refrigerator for actively reducing noise of the compressor cabin provided by the embodiment of the application is as follows:

firstly, producing a compressor cabin with a proper size, or arranging a shielding plate in the compressor cabin; then, devices such as a compressor and the like are arranged on the supporting plate; then, the supporting plate is communicated with a compressor and other devices and is placed in a compressor cabin, and the front side surface of the supporting plate is enabled to be abutted against the front side wall of the compressor cabin or the rear side surface of the shielding plate, so that no gap exists between the supporting plate and the compressor cabin; then, respectively embedding the bracket into the air inlet and the air outlet of the rear cover plate; then the microphone and the loudspeaker are respectively arranged on the two sides of the support; then clamping the support in a mounting hole in the center of the support, and respectively mounting the microphone and the loudspeaker on the inner side and the outer side of the rear cover plate; then, the microphone and the loudspeaker are respectively in signal connection with a control module on the main control board; and finally, fixing the rear cover plate on the rear side of the box body to realize the sealing of the compressor cabin.

The refrigerator with the actively noise-reduced compressor cabin provided by the embodiment of the application mainly aims at the noise-reduced and ventilation design of the compressor cabin of a refrigerator/freezer product with a bottom air cooler, on one hand, a closed cavity is formed by a rear cover plate, a support plate and the inner side wall of the compressor cabin by abutting the front side surface of the support plate against the front side wall of the compressor cabin, or a shielding plate is additionally arranged in the compressor cabin, the front side surface of the support plate abuts the rear side surface of the shielding plate, so that the closed cavity is formed by the rear cover plate, the support plate and the inner side wall of the compressor cabin, the sealing of the compressor cabin is realized, the noises such as the vibration noise of a compressor body, an exhaust pipe, the noise of the bottom air cooler and the like in the compressor cabin are isolated, and the reduction of; on the other hand, install microphone and speaker respectively on the back shroud, set up control module on the refrigerator main control panel, the microphone, the speaker is respectively with control module signal connection, wherein, the microphone is used for gathering compression cabin noise, and transmit the noise to control module, control module carries out phase analysis to noise sound wave signal, thereby control speaker produce with the compression cabin noise anti-phase "anti-noise", "anti-noise" and the superposition of compression cabin noise, the compression cabin noise has been offset, thereby realized the initiative of airtight compression cabin and fallen the noise, good noise reduction effect has been realized.

It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a circuit structure, 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 circuit structure, article, or apparatus. Without further limitation, the presence of an element identified by the phrase "comprising an … …" does not exclude the presence of other like elements in a circuit structure, article or device comprising the element.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

The above-described embodiments of the present application do not limit the scope of the present application.

Claims

1. A compressor compartment active noise reduction refrigerator, comprising:

a compressor mounted on the support plate;

2. The compressor cabin active noise reduction refrigerator according to claim 1, wherein a shielding plate is arranged between a front side wall of the compressor cabin and the compressor, and a rear side surface of the shielding plate is abutted against a front side surface of the supporting plate; the shielding plate, the supporting plate, the rear cover plate and the inner side wall of the compressor cabin form a closed cavity.

3. The refrigerator with compressor cabin active noise reduction according to claim 1, wherein an air inlet and an air outlet are respectively formed on two sides of the rear cover plate, and the microphone and the speaker are mounted at the air inlet and the air outlet.

4. The refrigerator with the compressor cabin for actively reducing noise according to claim 3, wherein a bracket is embedded in the air inlet, a mounting hole is formed in the center of the bracket, and the microphone is mounted on one side of the rear cover plate close to the compressor through the mounting hole so as to collect a noise signal in the compressor cabin; the loudspeaker is installed on one side, far away from the compressor, of the rear cover plate through the installation hole so as to generate sound waves in a phase opposite to that of noise in the compressor cabin.

5. The refrigerator with the active noise reduction function for the compressor cabin according to claim 3, wherein a bracket is embedded in the air outlet, a mounting hole is formed in the center of the bracket, and the microphone is mounted on one side, close to the compressor, of the rear cover plate through the mounting hole so as to collect a noise signal in the compressor cabin; the loudspeaker is installed on one side, far away from the compressor, of the rear cover plate through the installation hole so as to generate sound waves in a phase opposite to that of noise in the compressor cabin.

6. The compressor nacelle active noise reduction refrigerator according to claim 4 or 5, wherein the bracket comprises a plurality of hollow sub-frames, the plurality of sub-frames being connected by a mounting hole at a center of the bracket.

7. The compressor cabin active noise reduction refrigerator according to claim 6, wherein the microphone and the speaker are respectively mounted on a support, and the support is clamped in the mounting hole.

8. The compressor cabin active noise reduction refrigerator according to claim 3, wherein the air inlet and the air outlet are both square air inlets.

9. The compressor compartment active noise reduction refrigerator according to claim 1, wherein the rear cover plate is fixed to the cabinet.