Patent Description:
In most of the existing new energy devices, such as photovoltaic devices and inverters, a certain electromagnetic noise will be generated by internal components provided therein, such as reactors, during operation, which will cause certain harm to users' health when they are used for a long time.

For this, in the existing new energy devices, most of the noise generated is absorbed by mounting sound-absorbing materials inside a machine body. However, in the existing new energy devices, in order to meet the heat dissipation requirements, an air inlet duct and an air outlet duct for heat dissipation to the internal components are usually formed in the machine body, and sound-absorbing materials cannot be well arranged on the air ducts, which leads to noise leakage from the air duct, affecting the overall silencing effect of new energy device. The patent of <CIT> discloses a noise reduction apparatus and a generator assembly. The noise reduction apparatus includes a housing, a first baffle component, and a second baffle component. The housing includes a first installation room configured to install diesel generating equipment, and the first installation room has a top plate, a bottom plate, and a first side plate and a second side plate that are oppositely disposed. An air intake vent is disposed on the first side plate, and an air exhaust vent is disposed on the second side plate. The patent of <CIT> discloses an acoustic panel with a cellular core. The cellular core is provided with cells that are provided with one or more obstacles, each of said obstacles extending transversely in relation to the main axis of the associated cell so as to increase the length of the path that sound waves travel through the cell. The patent of <CIT> discloses an acoustically damping gas flow ducts of the kind comprising a duct of acoustically absorbing material having inlet and outlet apertures for the passage of a gaseous medium and which has an acoustically damping arrangement of deflecting walls or baffles whereby the gaseous medium flows along a longer path than the direct connection between the inlet and the outlet apertures. The patent of <CIT> discloses ventilation equipment for a sound insulation cover. A shell body is of a cuboid structure; an air inlet port is formed in the top of one side of the shell body, and an air outlet port is formed in the bottom of the other side of the shell body; a first filter screen is arranged on the air inlet port; a second filter screen is arranged on the air outlet port; an upper sound insulation plate group and a lower sound insulation plate group are arranged in the shell body; the upper sound insulation plate group comprises a first sound insulation plate, a second sound insulation plate and a third sound insulation plate; and a silencing exhaust fan is arranged on the air outlet port. The patent of <CIT> discloses a generator set silencer, relates to the technical field of generators, solves the problem that a traditional silencer is poor in noise reduction effect, and comprises an airflow pipeline which comprises a first side plate and a second side plate which are parallel to each other. A bottom plate perpendicular to the first side plate and the second side plate is arranged between the first side plate and the second side plate, the airflow pipeline is provided with an air inlet pipe on the first side plate and provided with an air outlet pipe on the second side plate, and a plurality of first partition plates are evenly distributed in the airflow pipeline in the length direction of the airflow pipeline.

A main object of the present application is to provide a muffler assembly, aiming to reduce the noise leakage of new energy device and further improves the overall silencing effect of new energy device.

In order to achieve the above object, the muffler assembly provided by the present application includes a muffler unit, the muffler unit includes a side plate and a partition plate, and the side plate includes an upper side plate and a lower side plate which are oppositely arranged, the partition plate includes a first partition plate, a second partition plate and a third partition plate, the first partition plate and the third partition plate are connected to the lower side plate, the second partition plate is connected to the upper side plate and arranged between the first partition plate and the third partition plate. A first muffler channel is formed by enclosure of the first partition plate and the second partition plate, a second muffler channel is formed by enclosure of the first partition plate, the third partition plate and the lower side plate, and a third muffler channel is formed by enclosure of the second partition plate and the third partition plate, the first muffler channel, the second muffler channel and the third muffler channel are sequentially in communication, and a cross-sectional area of the first muffler channel and a cross-sectional area of the third muffler channel are both less than a cross-sectional area of the second muffler channel.

In an embodiment, the muffler assembly includes at least two muffler units, at least two of the muffler units are connected side by side in sequence; a fourth muffler channel is formed by enclosure of the second partition plate and the upper side plate of any two adjacent muffler units, the fourth muffler channel is in communication with the third muffler channel of one muffler unit and the first muffler channel of another muffler unit.

The fourth muffler channel is arranged opposite to the second muffler channel, and the cross-sectional area of the first muffler channel and the cross-sectional area of the third muffler channel are both less than a cross-sectional area of the fourth muffler channel.

In an embodiment, a channel inlet is formed by enclosure of one end of the upper side plate and one end of the first partition plate facing away from the lower side plate, a channel outlet is formed by enclosure of the other end of the upper side plate and one end of the third partition plate facing away from the lower side plate. In two adjacent muffler units, the channel inlet of one muffler unit is in communication with the channel outlet of the other muffler unit. And/or, in two adjacent muffler units, the third partition plate of any one muffler unit and the first partition plate of the other muffler unit have an integrated structure.

According to the invention, at least one of the first partition plates, the second partition plate and the third partition plate is provided with a sound insulation plate, the sound insulation plate is arranged in the first muffler channel and/or the third muffler channel.

According to the invention, a surface of the second partition plate facing the first partition plate is provided with the sound insulation plate, a surface of the third partition plate facing the second partition plate is provided with the sound insulation plate.

According to the invention, the sound insulation plate is rotatably connected to the second partition plate and the third partition plate, and the sound insulation plate is fixed with the second partition plate and the third partition plate in a position-limitation manner when rotating to a certain angle.

In an embodiment, the muffler unit is further provided with a sound-absorbing layer, the sound-absorbing layer is arranged on the upper side plate and the bottom plate, and faces the lower side plate.

In an embodiment, the sound-absorbing layer is attached to the upper side plate and the lower side plate. And/or, the sound-absorbing layer is made of sound insulation cotton. And/or, the cross-sectional area of the first muffler channel is the same as the cross-sectional area of the third muffler channel.

In an embodiment, the muffler assembly further includes a mounting frame, the mounting frame is formed with an accommodating chamber, and the muffler unit is mounted in the accommodating chamber.

A new energy device is further provided according to the present application, which includes a machine body and a muffler assembly, the muffler assembly is mounted on the machine body and covers the air inlet and the air outlet of the machine body. The muffler assembly includes a muffler unit, the muffler unit includes a side plate and a partition plate, and the side plate includes an upper side plate and a lower side plate which are oppositely arranged; the partition plate includes a first partition plate, a second partition plate and a third partition plate, the first partition plate and the third partition plate are connected to the lower side plate, the second partition plate is connected to the upper side plate and arranged between the first partition plate and the third partition plate. A first muffler channel is formed by enclosure of the first partition plate and the second partition plate, the first partition plate, a second muffler channel is formed by enclosure of the third partition plate and the lower side plate, a third muffler channel is formed by enclosure of the second partition plate and the third partition plate, the first muffler channel, the second muffler channel and the third muffler channel are sequentially in communication, and a cross-sectional area of the first muffler channel and a cross-sectional area of the third muffler channel are both less than a cross-sectional area of the second muffler channel.

According to the technical solution of the present application, the muffler assemblies are arranged at the air inlet duct and the air outlet duct of the new energy device, and a first muffler channel, a second muffler channel and a third muffler channel are formed by enclosure of the side plates and the partition plates. Since a cross-sectional area of the first muffler channel and a cross-sectional area of the third muffler channel are both less than a cross-sectional area of the second muffler channel, when the noise propagates from the first muffler channel to the second muffler channel and from the second muffler channel to the third muffler channel, due to the abrupt variation of the cross-sectional area of the channel, the impedance of the acoustic wave of the noise is not matched and a reflection occurs, and the intensity of the noise is attenuated, thus achieving a certain silencing effect. In this way, the sound energy of the noise leaked through the air inlet duct and the air outlet duct of the new energy device can be greatly reduced under the action of the muffler assembly, thereby reducing the outward radiation and transmission of noise, reducing the noise leakage of new energy device, and further improving the overall silencing effect of new energy device.

For more clearly illustrating embodiments of the present application or the technical solutions in the conventional technology, drawings referred to describe the embodiments or the conventional technology will be briefly described hereinafter. Apparently, the drawings in the following description are only some examples of the present application, and for those skilled in the art, other drawings may be obtained based on these drawings without any creative efforts.

Reference numerals in the drawings are as follows:.

The realization of the objects, functional characteristics and advantages of the present application will be further described in conjunction with the embodiments and with reference to the drawings.

The technical solutions according to the embodiments of the present application will be described clearly and completely as follows in conjunction with the drawings in the embodiments of the present application. It is apparent that the described embodiments are only a part of the embodiments according to the present application, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those having ordinary skill in the art without creative work shall fall within the protection scope of the present application.

In the existing new energy devices, most of the noise generated is absorbed by mounting sound-absorbing materials inside a machine body. However, in the existing new energy devices, in order to meet the heat dissipation requirements, an air inlet duct and an air outlet duct for heat dissipation to the internal components are usually formed in the machine body, and sound-absorbing materials cannot be well arranged on the air ducts, which leads to noise leakage from the air duct, affecting the overall silencing effect of new energy device. In view of the above problems, a muffler assembly <NUM> is provided according to the present application.

Referring to <FIG>, in the embodiment of the present application, the muffler assembly <NUM> includes a muffler unit <NUM>, the muffler unit <NUM> includes a side plate and a partition plate, and the side plate includes an upper side plate <NUM> and a lower side plate <NUM> which are oppositely arranged; the partition plate includes a first partition plate <NUM>, a second partition plate <NUM> and a third partition plate <NUM>, the first partition plate <NUM> and the third partition plate <NUM> are connected to the lower side plate <NUM>, the second partition plates <NUM> are connected to the upper side plate <NUM> and arranged between the first partition plate <NUM> and the third partition plate <NUM>. A first muffler channel <NUM> is formed by enclosure of the first partition plate <NUM> and the second partition plate <NUM>, a second muffler channel <NUM> is formed by enclosure of the first partition plate <NUM>, the third partition plate <NUM> and the lower side plate <NUM>, and a third muffler channel <NUM> is formed by enclosure of the second partition plate <NUM> and the third partition plate <NUM>. The first muffler channel <NUM>, the second muffler channel <NUM> and the third muffler channel <NUM> are sequentially in communication, and a cross-sectional area of the first muffler channel <NUM> and a cross-sectional area of the third muffler channel <NUM> are both less than a cross-sectional area of the second muffler channel <NUM>.

According to the technical solution of the present application, the muffler assembly <NUM> are arranged at the air inlet duct and the air outlet duct of the new energy device, and a first muffler channel <NUM>, a second muffler channel <NUM> and a third muffler channel <NUM> are formed by enclosure of the side plates and the partition plates. Since the cross-sectional area of the first muffler channel <NUM> and the cross-sectional area of the third muffler channel <NUM> are both less than the cross-sectional area of the second muffler channel <NUM>, and thus when the noise propagates from the first muffler channel <NUM> to the second muffler channel <NUM> and from the second muffler channel <NUM> to the third muffler channel <NUM>, due to an abrupt variation of the cross-sectional area of the channel, the impedance of the noise sound wave is mismatched and thus reflection occurs, and the intensity of the noise is attenuated, thus achieving a certain silencing effect (the specific noise propagation path can be referred to <FIG>, <FIG> and <FIG>, in which dashed lines with arrows represent the transmission and reflection of noise in the muffler channel). In this way, the sound energy of the noise leaked through the air inlet duct and the air outlet duct of the new energy device can be greatly reduced under the action of the muffler assembly <NUM>, thereby reducing the outward radiation and transmission of noise, reducing the noise leakage of new energy device, and further improving the overall silencing effect of new energy device.

It can be understood that the first muffler channel <NUM> can be used to be in communication with the heat dissipation device of the new energy device, that is to say, the first muffler channel <NUM> is in communication with the accommodation space for accommodating the heat sink, and the third muffler channel <NUM> can be used to be in communication with the outside. The first muffler channel <NUM> and the second muffler channel <NUM> may be directly connected, and alternatively, a transition section may also be provided between the first muffler channel and the second muffler channel. Similarly, the second muffler channel <NUM> and the third muffler channel <NUM> may be directly connected, and alternatively, a transition section may be provided between the second muffler channel and the third muffler channel. The cross sections of the first muffler channel <NUM>, the second muffler channel <NUM> and the third muffler channel <NUM> can be square or round, etc., so that the shape of the muffler channels are more regular, which facilitates of improving the convenience of processing and molding. Of course, the present application is not limited to this, in other embodiments, the cross sections of the first muffler channel <NUM>, the second muffler channel <NUM> and the third muffler channel <NUM> may also be triangular or other shapes. In addition, the heat dissipation device of the new energy device can be a heat-dissipation fan, which provides a driving force, so that the external cooling air can be better driven to enter the muffler channel through the third muffler channel <NUM>, and then flow out through the first muffler channel <NUM> to enter the new energy device, and then the cooling air exchanges heat with the electrical components of the new energy device to further improve the heat dissipation effect of the new energy device. Of course, the present application is not limited to this, in other embodiments, the heat dissipation device can also be a refrigeration semiconductor or a refrigeration compressor and other devices that can be used for heat dissipation.

Referring to <FIG>, <FIG> and <FIG>, in an embodiment of the present application, the muffler assembly <NUM> includes at least two muffler units <NUM>, which are connected side by side; a fourth muffler channel <NUM> is formed by enclosure of the second partition plate <NUM> and the upper side plate <NUM> of any two adjacent muffler units <NUM>, and the fourth muffler channel <NUM> is in communication with the third muffler channel <NUM> of one muffler unit <NUM> and with the first muffler channel <NUM> of another muffler unit <NUM>. The fourth muffler channel <NUM> is arranged opposite to the second muffler channel <NUM>, and the cross-sectional area of the first muffler channel <NUM> and the cross-sectional area of the third muffler channel <NUM> are both less than a cross-sectional area of the fourth muffler channel <NUM>.

In this embodiment, the muffler assembly <NUM> includes multiple muffler units <NUM>, the noise can be transmitted through the muffler channels of the multiple muffler units <NUM> in sequence, and the sound energy of the noise can be further attenuated in the process of transmission through the muffler units <NUM>, thereby further improving the silencing effect of the muffler assembly <NUM>. The fourth muffler channel <NUM> is formed at the interconnection of two adjacent muffler units <NUM>, the cross-sectional area of the fourth muffler channel <NUM> is greater than both the cross-sectional area of the first muffler channel <NUM> and the cross-sectional area of the third muffler channel <NUM>, so that, when the noise attenuated by a muffler unit <NUM> propagates from the third muffler channel <NUM> toward the fourth muffler channel <NUM>, due to the abrupt variation of the cross-sectional area of the channel, the acoustic impedance of the noise is not matched again and reflection occurs in the fourth muffler channel <NUM>; Similarly, when the noise propagates from the fourth muffler channel <NUM> to the first muffler channel <NUM> of another muffler unit <NUM>, the abrupt variation of the cross-sectional area of the channel also causes the reflection of the noise, and thus the overall structure of the muffler assembly <NUM> is fully utilized for silencing treatment, which further improves the silencing effect and a sound attenuation rate of the muffler assembly <NUM>.

In addition, by providing the fourth muffler channel <NUM>, any two connected muffler units <NUM> can form multiple expansion chamber structures that are staggered and arranged in series, the noise can cause reflection of sound waves when entering and leaving any of the first muffler channels <NUM> and the third muffler channels <NUM>, which further accelerates the noise attenuation. By oppositely arranging the fourth muffler channel <NUM> and the second muffler channel <NUM>, multiple expansion chambers can be staggered from top to bottom in sequence, so that a muffler channel being zigzag is formed in the muffler assembly <NUM>, which is beneficial to enhance the reflection amplitude and frequency of noise, and the noise can be sufficiently attenuated, thereby further improving the overall silencing effect of the muffler assembly <NUM>, and improving the practicability and reliability of the muffler assembly <NUM>.

Further, referring to <FIG>, <FIG> and <FIG>, in an embodiment of the present application, a channel inlet <NUM> is formed by enclosure of one end of the upper side plate <NUM> and the end of the first partition plate <NUM> facing away from the lower side plate <NUM>, and a channel outlet <NUM> is formed by enclosure of the other end of the upper side plate <NUM> and the end of the third partition plate <NUM> facing away from the lower side plate <NUM>. The channel inlet <NUM> of any one muffler unit <NUM> is in communication with the channel outlet <NUM> of the other muffler unit <NUM> in two adjacent muffler units. And/or, the third partition plate <NUM> of any one muffler unit <NUM> and the first partition plate <NUM> of the other muffler unit <NUM> have an integrated structure in two adjacent muffler units.

In this embodiment, the channel inlet <NUM> and the channel outlet <NUM> are enclosed by the side plate and the partition plate, the channel inlet <NUM> can be configured to directly communicate the new energy device with the first muffler channel, and the third muffler channel is directly in communication with the outside through the channel outlet <NUM>, which further improves the ventilation rate of the muffler assembly, and facilitates the noise of entering the muffler assembly for silencing treatment. The channel inlet <NUM> can be directly in communication with the first muffler channel <NUM>, and the channel outlet <NUM> can be directly in communication with the third muffler channel <NUM>, which is beneficial to ensure the overall ventilation effect of the muffler channel, facilitate of noise transmission, and improve the practicability of the muffler assembly <NUM>. Of course, transition sections may also be provided between the channel inlet <NUM> and the first muffler channel <NUM> and between the channel outlet <NUM> and the third muffler channel <NUM>, so that the channel inlet <NUM> can be indirectly in communication with the first muffler channel <NUM>, and the channel outlet <NUM> can be indirectly in communication with the third muffler channel <NUM>.

Moreover, any two adjacent third partition plates <NUM> of one muffler unit <NUM> and the first partition plates <NUM> of another muffler unit <NUM> are configured to have an integrated structure, which can improve the integrity of multiple muffler units <NUM>, and is beneficial to further simplify the overall structure of the muffler assembly <NUM> and facilitate the lightweight design of the muffler assembly <NUM>. In addition, it is also beneficial to reduce the installation structure in the muffler assembly <NUM>, which facilitates of disassembly and maintenance of the muffler assembly <NUM>, and the integrated design may also reduce the installation and production cost of the muffler assembly <NUM>, which further improves the practicability of the muffler assembly <NUM>.

Referring to <FIG>, <FIG> and <FIG>, in an embodiment of the present application, at least one of the first partition plate <NUM>, the second partition plate <NUM> and the third partition plate <NUM> is provide with a sound insulation plate <NUM>, the sound insulation plate <NUM> is arranged in the first muffler channel <NUM> and/or the third muffler channel <NUM>.

In this embodiment, by providing the sound insulation plate <NUM>, the propagation of noise in the first muffler channel <NUM> or the third muffler channel <NUM> can be further weakened, and the silencing effect of the muffler assembly <NUM> can be further improved. The sound insulation plate <NUM> is arranged in the first muffler channel <NUM> or the third muffler channel <NUM>, which may affect the transmission zone of the noise in the first muffler channel <NUM> or the third muffler channel <NUM>, and increase the expansion ratio of noise when entering the second muffler channel <NUM> from the first muffler channel <NUM> or entering the third muffler channel <NUM> from the second muffler channel <NUM>, so that the noise at some frequency bands can be reflected better, and the sound attenuation effect of the muffler assembly <NUM> can be further improved. Meanwhile, the sound insulation plate <NUM> arranged in the first muffler channel <NUM> or the third muffler channel <NUM> can function as a sound barrier for noise in a certain extent, so that part of the noise collides with the sound insulation plate <NUM> during propagation and is reflected or refracted, further improving the attenuation of noise sound energy and achieving a better silencing effect.

The sound insulation plate <NUM> may be provided on one of the first partition plate <NUM>, the second partition plate <NUM> and the third partition plate <NUM>. In that case, the sound insulation plate <NUM> is provided on the portion of the first partition plate <NUM> or the second partition plate <NUM> that is located in the first muffler channel <NUM>, or the sound insulation plate <NUM> may be provided at the part of the third partition plate <NUM> located in the third muffler channel <NUM>, so that the sound insulation plate <NUM> has a certain sound attenuation effect on the first muffler channel <NUM> or the third muffler channel <NUM>. In addition, all the first partition plate <NUM>, the second partition plate <NUM> and the third partition plate <NUM> may be provided with sound insulation plates <NUM>. In that case, the sound insulation plate <NUM> on the first partition plate <NUM> can be used to influence the noise entering the first muffler channel <NUM> from outside the muffler unit <NUM>, and the sound insulation plate <NUM> on the second partition plate <NUM> may be disposed in the first muffler channel <NUM>, and the sound insulation plate <NUM> on the third partition plate <NUM> may be disposed in the third muffler channel <NUM>, thereby further improving the overall silencing effect of the muffler assembly <NUM>.

Further, referring to <FIG> and <FIG>, in an embodiment of the present application, the surface of the second partition plate <NUM> facing the first partition plate <NUM> is provided with the sound insulation plate <NUM>, and the surface of the third partition plate <NUM> facing the second partition plate <NUM> is provided with the sound insulation plate <NUM>.

In this embodiment, the first muffler channel <NUM> and the third muffler channel <NUM> of the muffler unit <NUM> are both provided with sound insulation plates <NUM>, so that noise can be further blocked and reflected when entering and leaving the second muffler channel <NUM> and the expansion ratio of noise propagation can be increased, which further accelerates the sound energy attenuation of the noise in the muffler unit <NUM> to achieve a better silencing effect. In that case, it is not necessary for the first partition plate <NUM> to be provided with the sound insulation plate <NUM>, in order to better fit the muffler assembly <NUM> to the new energy device for installation, which is beneficial to make the overall structure of the muffler assembly <NUM> more simple, and further improve the practicability and reliability of the muffler assembly <NUM>. In addition, in case that the muffler assembly <NUM> is provided with multiple muffler units <NUM>, the sound insulation plate <NUM> arranged on the third partition plate <NUM> may also reduce the sound energy of the noise entering the other muffler unit <NUM> from the third muffler channel <NUM> of one muffler unit <NUM>, so that the noise can be attenuated or even disappear after being silenced by multiple muffler units <NUM>, thereby further improving the overall silencing effect of the muffler assembly <NUM>.

Further, referring to <FIG>, in an embodiment of the present application, the sound insulation plate <NUM> is rotatably connected to the second partition plate <NUM> and the third partition plate <NUM>, and the sound insulation plate is fixed with the second partition plate <NUM> and the third partition plate <NUM> in a position-limitation manner when rotating to a certain angle.

In this embodiment, the sound insulation plate <NUM> is rotatably connected to the second partition plate <NUM> and the third partition plate <NUM>, a certain included angle can be formed between the sound insulation plate <NUM> and the second partition plate <NUM>, and between the sound insulation plate <NUM> and the third partition plate <NUM>, so that the noise can be better reflected in various directions; the size of the channel through which the noise is transmitted through the first muffler channel <NUM> or the third muffler channel <NUM> can be adjusted by adjusting the included angle between the sound insulation plate <NUM> and the second partition plate <NUM> or the included angle between the sound insulation plate <NUM> and the third partition plate <NUM>, thereby adjusting the expansion ratio between the first muffler channel <NUM> and the second muffler channel <NUM> and the expansion ratio between the third muffler channel <NUM> and the second muffler channel <NUM>, so that the muffler unit <NUM> can better silence the noise at a certain frequency band, and achieve a better silencing effect. Furthermore, in case that the muffler assembly <NUM> includes multiple muffler units <NUM>, the angle of the sound insulation plate <NUM> in each muffler unit <NUM> is adjusted by rotation, the included angle between each sound insulation plate <NUM> and the second partition plate <NUM> or the third partition plate <NUM> is configured to be different, so that it is possible to make the muffler channels in each muffler unit <NUM> with different expansion ratios, and thus the multiple muffler units <NUM> of the muffler assembly <NUM> can provide a certain silencing effect for noises at different frequency bands. In that case, the silencing effect of the muffler assembly <NUM> is more significant, thereby further improving the overall silencing effect of the muffler assembly <NUM>, and improving the practicability and reliability of the muffler assembly <NUM>.

The sound insulation plate <NUM> can be fixed on a pivot, and the pivot is sleeved on the pivot seat of the partition plate to realize the rotation of the sound insulation plate <NUM>. The pivot seat may also be provided with a damping-limiting structure, so that when the sound insulation plate <NUM> rotates to a certain angle, the pivot can be fixed on the pivot seat in a position-limitation manner by the damping limiting structure, so as to realize the position limiting and fixation of the sound insulation plate <NUM>. In addition, in other embodiments, the sound insulation plate <NUM> may also be rotatably connected to the second partition plate <NUM> or the third partition plate <NUM> by screw transmission or gear rotation.

Referring to <FIG>, <FIG>, <FIG> and <FIG>, in an embodiment of the present application, the muffler unit <NUM> is further provided with a sound-absorbing layer <NUM>, and the sound-absorbing layer <NUM> is arranged on the upper side plate <NUM> and the lower side plate <NUM>.

In this embodiment, the sound-absorbing layer <NUM> may further absorb the noise transmitted into the muffler channel, thus further improving the noise reduction effect of new energy device. Since the noise will propagate more toward the upper side plate <NUM> and the lower side plate <NUM> after being reflected, and the sound-absorbing layer <NUM> is provided on the upper side plate <NUM> and the lower side plate <NUM>, the reflected or refracted noise can be better absorbed on the upper side plate <NUM> and the lower side plate <NUM>, which is beneficial to reduce the re-reflection or refraction of noise, and further improve the silencing effect of the muffler channel. In addition, the sound-absorbing layer <NUM> may also be arranged on the first partition plate <NUM>, the second partition plate <NUM> and the third partition plate <NUM>, so that the sound-absorbing layer <NUM> is arranged in the whole muffler channel. The noise can be absorbed by the sound-absorbing layer <NUM> after being reflected or refracted during its propagation in the muffler channel, so as to fully absorb the noise transferred to the muffler channel.

In an embodiment of the present application, the sound-absorbing layer <NUM> is attached to the upper side plate <NUM> and the lower side plate <NUM>. And/or, the sound-absorbing layer is made of sound insulation cotton. And/or, the cross-sectional area of the first muffler channel <NUM> is the same as the cross-sectional area of the third muffler channel <NUM>.

In this embodiment, the sound-absorbing layer <NUM> can be fixed by bonding, and there is no need to set a complicated connection structure on the upper side plate <NUM> and the lower side plate <NUM>, which is beneficial to simplify the overall structure of the muffler assembly <NUM>. With this arrangement, the connection area of the sound-absorbing layer <NUM> with the upper side plate <NUM> and the lower side plate <NUM> can also be increased, which is beneficial to improve the installation stability of the sound-absorbing layer <NUM>. Of course, the present application is not limited to this, in other embodiments, a clamping member may also be arranged on the upper side plate <NUM> and the lower side plate <NUM> to clamp and fix the sound-absorbing layer <NUM>; or the sound-absorbing layer is directly fixed by screws. In addition, in one embodiment, the sound-absorbing layer <NUM> may be sound insulation cotton. It can be understood that the sound insulation cotton has the advantages of good silencing effect, relatively long service life and relatively low cost, which is beneficial to improve the sound absorbing effect of the sound-absorbing layer <NUM> and reduce the manufacturing cost. Of course, it should be noted that the present application is not limited to this, in other embodiments, the sound-absorbing layer <NUM> may be a deadening fabric or the like.

In addition, the cross-sectional area of the first muffler channel <NUM> is configure to be the same as the cross-sectional area of the third muffler channel <NUM>, which ensures that the external air flow is provided with the same throughput both in the first muffler channel <NUM> and the third muffler channel <NUM>. In that case, the external cooling air may flow relatively smoothly in the muffler channel, which is beneficial to further ensure the heat dissipation effect on the new energy device. This arrangement also makes the shape of the muffler channel be relatively regular, which is beneficial to improve the convenience of forming the muffler channel. Of course, it should be noted that the present application is not limited to this. In other embodiments, the cross-sectional area of the first muffler channel <NUM> may be different from the cross-sectional area of the third muffler channel <NUM>.

Referring to <FIG>, in an embodiment of the present application, the muffler assembly <NUM> further includes a mounting frame <NUM>, the mounting frame <NUM> is provided with an accommodating chamber, and the muffler unit <NUM> is mounted in the accommodating chamber.

In this embodiment, by mounting the muffler unit <NUM> in the accommodating chamber, the two end faces of the muffler unit <NUM> can be blocked by the end plates of the mounting frame <NUM> and the noise can be better concentrated and transmitted in the muffler channels in the muffler unit <NUM>, which further reduces the noise leakage and improves the overall silencing effect of the muffler assembly <NUM>. Meanwhile, in case that the muffler assembly <NUM> includes multiple muffler units <NUM>, multiple muffler units <NUM> can be neatly arranged in the mounting frame <NUM>, so that the overall structure of the muffler assembly <NUM> is neater and more aesthetic, and it is more convenient to assemble and use. The muffler unit <NUM> can be assembled by attaching the upper side plate <NUM> and the lower side plate <NUM> to the upper and lower opposite inner walls in the accommodating chamber, or the muffler unit can be assembled by means of screw fixation.

A new energy device (not shown) is further provided according to the present application, which includes a machine body (not shown) and a muffler assembly <NUM>. The muffler assembly <NUM> is mounted on the machine body and covers the air inlet and air outlet of the machine body, the specific structure of the muffler assembly <NUM> refers to the above embodiments, and since the new energy device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which are repeated herein.

Claim 1:
A muffler assembly (<NUM>), comprising a muffler unit (<NUM>), wherein the muffler unit (<NUM>) comprises:
a side plate, wherein the side plate comprises an upper side plate (<NUM>) and a lower side plate (<NUM>) which are oppositely arranged; and
a partition plate, wherein the partition plate comprises a first partition plate (<NUM>), a second partition plate (<NUM>) and a third partition plate (<NUM>), the first partition plate (<NUM>) and the third partition plate (<NUM>) are connected to the lower side plate (<NUM>), the second partition plate (<NUM>) is connected to the upper side plate (<NUM>) and arranged between the first partition plate (<NUM>) and the third partition plate (<NUM>);
wherein a first muffler channel (<NUM>) is formed by enclosure of the first partition plate and the second partition plate (<NUM>), a second muffler channel (<NUM>) is formed by enclosure of the first partition plate (<NUM>), the third partition plate (<NUM>) and the lower side plate (<NUM>), and a third muffler channel (<NUM>) is formed by enclosure of the second partition plate (<NUM>) and the third partition plate (<NUM>), wherein the first muffler channel (<NUM>), the second muffler channel (<NUM>) and the third muffler channel (<NUM>) are sequentially in communication, and a cross-sectional area of the first muffler channel (<NUM>) and a cross-sectional area of the third muffler channel (<NUM>) are both less than a cross-sectional area of the second muffler channel (<NUM>),
wherein at least one of the first partition plate (<NUM>), the second partition plate (<NUM>) and the third partition plate (<NUM>) is provided with a sound insulation plate (<NUM>), the sound insulation plate (<NUM>) is arranged in the first muffler channel (<NUM>) and/or the third muffler channel(<NUM>),
wherein a surface of the second partition plate (<NUM>) facing the first partition plate (<NUM>) is provided with the sound insulation plate (<NUM>), and a surface of the third partition plate (<NUM>) facing the second partition plate (<NUM>) is provided with the sound insulation plate(<NUM>),
characterized in that the sound insulation plate (<NUM>) is rotatably connected to the second partition plate (<NUM>) and the third partition plate (<NUM>), and the sound insulation plate (<NUM>) is fixed with the second partition plate (<NUM>) and the third partition plate (<NUM>) in a position-limitation manner when rotating to a certain angle.