CN217421655U - Amortization wind channel structure and dc-to-ac converter - Google Patents

Abstract

The utility model provides an amortization wind channel structure and dc-to-ac converter belongs to electrical equipment technical field, and its amortization wind channel structure includes casing and amortization structure, and the casing setting is covered after the dc-to-ac converter to cover with the back and form together and have open-ended cavity structures, cavity structures and the fan assembly's of dc-to-ac converter air intake intercommunication formation wind channel, and the amortization structure sets up in cavity structures. The utility model discloses can guarantee fan unit's normal air inlet, not influence the radiating effect of dc-to-ac converter, the air intake that can avoid fan unit's noise directly to cover after again propagates out, simultaneously, sets up the amortization structure in cavity structures, handles fan unit's noise through the amortization structure, can further reduce the propagation of the noise that fan unit produced to reduce the noise of dc-to-ac converter on the whole, improve the sound quality.

Description

Amortization wind channel structure and dc-to-ac converter

Technical Field

The utility model relates to an electrical equipment technical field particularly, relates to a amortization wind channel structure and dc-to-ac converter.

Background

The inverter is a device capable of converting direct current electric energy such as a battery or an accumulator jar into constant-frequency constant-voltage or frequency-modulation voltage-regulation alternating current, is widely applied to daily electric appliances such as an air conditioner, a home theater, a computer, a television, a washing machine, a range hood, a refrigerator and the like, and is generally provided with an air inlet on a rear cover thereof and a fan assembly at a corresponding position in order to facilitate heat dissipation.

As the demand for inverter power is increasing and the demand for inverter size is decreasing, the heat dissipation problem is worsened, and it is necessary to increase the number and the number of fans to meet the heat dissipation demand. However, when the number and the number of the fans are increased, the noise of the fan assembly is directly transmitted through the air inlet of the rear cover, which causes the noise of the inverter to be greatly increased and the sound quality to be reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem how to reduce the noise of dc-to-ac converter, improve the sound quality.

In order to solve the problem, the utility model provides an amortization wind channel structure for the dc-to-ac converter, including casing and amortization structure, the casing sets up cover behind the dc-to-ac converter, and with the back lid forms together and has open-ended cavity structures, cavity structures with the air intake intercommunication of the fan assembly of dc-to-ac converter forms the wind channel, the amortization structure sets up in the cavity structures.

Optionally, the casing includes a shell plate and a wall plate, the wall plate is disposed along a circumferential direction of the shell plate and forms the opening, one side end face of the wall plate is connected to the shell plate, the other side end face of the wall plate is connected to the rear cover, and the sound-deadening structure includes a sound-deadening material, and the sound-deadening material is disposed on an inner wall of the shell plate and/or the wall plate.

Optionally, the silencing structure further comprises a partition plate and a communicating structure, the partition plate is arranged on the shell and divides the cavity structure into a first cavity and a second cavity, the first cavity is communicated with the air inlet, the second cavity is communicated with the opening, and the communicating structure is arranged on the partition plate and is suitable for being communicated with the first cavity and the second cavity.

Optionally, a sectional area of the air inlet is smaller than a sectional area of the first cavity, and a sectional area of the communication structure is smaller than a sectional area of the first cavity.

Optionally, a cross-sectional area of the communicating structure is smaller than a cross-sectional area of the second cavity, and a cross-sectional area of the opening is smaller than a cross-sectional area of the second cavity.

Optionally, the communicating structure is a silencing pipe, one end of the silencing pipe is communicated with the first cavity, and the other end of the silencing pipe is communicated with the second cavity.

Optionally, the sound-deadening structure further comprises a plurality of baffles, the baffles are arranged at intervals and are arranged in the cavity structure, the air duct is divided into a plurality of independent air ducts, and the independent air ducts and the fans of the fan assemblies are arranged in a one-to-one correspondence manner.

Optionally, the silencing structure includes the partition plate, the communicating structure and the baffle, the communicating structure is a plurality of silencing pipes, and the plurality of silencing pipes and the plurality of fans are arranged in a one-to-one correspondence manner.

Optionally, a cross-sectional area of each of the muffling pipes is not smaller than a cross-sectional area of the air inlet of the corresponding fan.

Compared with the prior art, the utility model discloses following beneficial effect has:

the shell is arranged on the rear cover of the inverter and forms a cavity structure with an opening together with the rear cover, the cavity structure is communicated with the air inlet arranged on the rear cover to form an air channel, so that normal air inlet of the fan assembly can be ensured, the heat dissipation effect of the inverter is not influenced, the noise of the fan assembly can be prevented from being directly transmitted from the air inlet on the rear cover, the noise can be reduced to a certain degree, and simultaneously, the noise reduction structure is arranged in the cavity structure, the noise of the fan component is processed through the noise reduction structure, the transmission of the noise generated by the fan component can be further reduced, thereby reducing the noise of the inverter on the whole and improving the sound quality, in addition, compared with the open type air inlet, after the cavity structure is communicated with the air inlet arranged on the rear cover to form an air duct, the air inlet volume of the fan assembly can be increased under the action of the negative pressure of air, and the heat dissipation effect of the inverter is better.

Another object of the present invention is to provide an inverter to solve the problem of reducing the noise of the inverter, and improve the sound quality.

In order to solve the above problems, the technical scheme of the utility model is that:

an inverter includes a rear cover, a fan assembly and a muffling air channel structure as described above.

The advantages of the inverter and the silencing air duct structure relative to the prior art are the same, and are not described in detail herein.

Drawings

Fig. 1 is a schematic diagram of a structure of a silencing air duct and a structure of a part of an inverter in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a housing and a noise reduction structure in an embodiment of the present invention;

fig. 3 is a schematic structural view of a housing and a noise reduction structure according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of a housing and a silencing structure according to another embodiment of the present invention;

fig. 5 is a schematic structural view of a housing and a noise reduction structure according to another embodiment of the present invention;

FIG. 6 is a schematic diagram of a structure of a muffling air channel according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an inverter according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of another view angle of the inverter according to the embodiment of the present invention.

Description of reference numerals:

1-shell, 11-shell plate, 12-wall plate, 2-silencing structure, 21-silencing material, 22-partition plate, 23-communication structure, 24-baffle plate, 3-opening, 4-cavity structure, 41-first cavity, 42-second cavity, 100-rear cover, 200-fan component, 201-fan and 300-air inlet.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be understood that the forward direction of "X" in the drawings represents the left direction, and correspondingly, the reverse direction of "X" represents the right direction; the forward direction of "Y" represents forward, and correspondingly, the reverse direction of "Y" represents rearward; the forward direction of "Z" represents the upward direction, and the reverse direction of "Z" represents the downward direction, and the directions or positional relationships indicated by the terms "X", "Y", "Z", etc. are based on the directions or positional relationships shown in the drawings of the specification, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular direction, be constructed and operated in a particular direction, and therefore should not be construed as limiting the invention.

The terms "first" and "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In order to solve the above problem, the embodiment of the utility model provides a amortization wind channel structure for the dc-to-ac converter, including casing 1 and amortization structure 2, casing 1 sets up on the back lid 100 of dc-to-ac converter to form cavity structure 4 that has opening 3 together with back lid 100, cavity structure 4 forms the wind channel with the air intake 300 intercommunication of the fan assembly 200 of dc-to-ac converter, and amortization structure 2 sets up in cavity structure 4.

As shown in fig. 8, in order to facilitate heat dissipation of the inverter, an air inlet 300 is generally disposed on the rear cover 100, a fan assembly 200 formed by grouping a plurality of fans 201 is disposed at a position corresponding to the air inlet 300, the fan assembly 200 sends air into the housing of the inverter from the air inlet 300, and the air absorbs heat generated by operation of the inverter and is then discharged from a heat dissipation grid around the housing, thereby completing heat dissipation. However, noise generated when the fan assembly 200 operates can be transmitted through the air inlet 300 of the rear cover 100, which causes a significant increase in noise of the inverter and a reduction in sound quality.

As shown in fig. 1 to 5, in the present embodiment, the housing 1 is configured in a shape matching the shape of the rear cover 100 of the inverter, for example, a circular shape, a rectangular shape, or various shapes combined therewith, and may be configured at a position on the outer side of the rear cover 100 where the air inlet 300 of the fan assembly 200 can be shielded by welding, riveting, bolting, or snapping, and the housing 1 and the rear cover 100 together can further form a cavity structure 4 having an opening 3, and the cavity structure 4 is communicated with the air inlet 300 to form an air duct.

It should be noted that the fan assembly 200 may be disposed on the upper or lower portion of the rear cover 100, and may be disposed along the width direction or the height direction of the inverter, and accordingly, the opening 3 of the cavity structure 4 may be disposed upward, downward, leftward or rightward.

As shown in fig. 8, the width direction of the inverter is the X-axis direction, and the height direction of the inverter is the Z-axis direction.

It should be noted that the silencing structure 2 may adopt a structure for silencing by using a resistive silencing principle, for example, a structure made of a porous sound absorbing material such as silencing cotton, or a structure formed by combining a pipe and a chamber with an abrupt interface, and the structure for silencing by filtering noise of certain frequency components, or a structure for silencing by using a small hole silencing principle, or a structure for silencing by using a combination of multiple modes, which is not limited herein.

Thus, the housing 1 is disposed on the rear cover 100 of the inverter to form the cavity structure 4 with the opening 3 together with the rear cover 100, the cavity structure 4 is communicated with the air inlet 300 disposed on the rear cover 100 to form an air duct, which not only ensures normal air intake of the fan assembly 200 without affecting the heat dissipation effect of the inverter, but also prevents the noise of the fan assembly 200 from directly spreading out from the air inlet 300 on the rear cover 100 to reduce the noise to a certain extent, meanwhile, the noise reduction structure 2 is disposed in the cavity structure 4 to treat the noise of the fan assembly 200 through the noise reduction structure 2, thereby further reducing the noise generated by the fan assembly 200, and reducing the noise of the inverter as a whole and improving the sound quality, in addition, compared with the open air inlet 300, after the cavity structure 4 is communicated with the air inlet 300 disposed on the rear cover 100 to form the air duct, the air intake of the fan assembly 200 can be improved under the action of the negative pressure of air, and further the heat dissipation effect of the inverter is better.

Alternatively, the housing 1 includes a shell plate 11 and a wall plate 12, the wall plate 12 is disposed along a circumferential direction of the shell plate 11 and forms the opening 3, one end surface of the wall plate 12 is connected to the shell plate 11, the other end surface of the wall plate 12 is connected to the rear cover 100, the sound deadening structure 2 includes a sound deadening material 21, and the sound deadening material 21 is disposed on an inner wall of the shell plate 11 and/or the wall plate 12.

As shown in fig. 1 to 5, the rear cover 100 of the inverter is rectangular as a whole, the air inlet 300 of the fan assembly 200 is disposed at a position close to the middle of the rear cover 100 and protrudes rearward, in order to enable the casing 1 to shield the air inlet 300 and form a cavity structure 4 with an opening 3 with the rear cover 100, the casing 1 is a structure composed of a casing plate 11 and a wall plate 12 which is U-shaped as a whole, a rear end face of the U-shaped wall plate and the casing plate 11 can be connected by welding, riveting or bolting, a front end face of the U-shaped wall plate can be detachably connected with the rear cover 100 by screws, and after the casing 1 is connected with the rear cover 100, the casing plate 11 can shield the air inlet 300 of the fan assembly 200, and the opening 3 of the cavity structure 4 can be formed between an open side of the U-shaped wall plate and the rear cover 100.

It should be noted that, in order to meet the requirement of arranging the components inside the inverter housing, the rear cover 100 is not in a flat plate shape, and the air inlet 300 is protruded backward on the rear cover 100, so that, in order to ensure that the overall shape of the housing 1 is more beautiful and can be tightly attached to the rear cover 100, the shape of the end surface of the U-shaped wall facing the rear cover 100 can be configured correspondingly according to the shape of the rear cover 100 and the installation requirement.

As shown in fig. 2, in the present embodiment, the shell plate 11 and the wall plate 12 of the casing 1 are connected by way of integral molding, and a layer of sound-deadening material 21, such as sound-deadening cotton or sound-absorbing board, is disposed on the inner walls of the shell plate 11 and the wall plate 12, after the noise generated by the fan assembly 200 is transmitted into the cavity structure 4 from the air inlet 300, the noise can be prevented from being directly transmitted due to the blocking of the casing 1, and further weakened under the effect of the sound-deadening material 21, so that the noise of the inverter can be reduced, and the sound quality can be improved.

Optionally, the silencing structure 2 further includes a partition 22 and a communicating structure 23, the partition 22 is disposed on the housing 1 and divides the cavity structure 4 into a first cavity 41 and a second cavity 42, the first cavity 41 is communicated with the air inlet 300, the second cavity 42 is communicated with the opening 3, and the communicating structure 23 is disposed on the partition 22 and is adapted to communicate the first cavity 41 and the second cavity 42.

As shown in fig. 3, the partition 22 may be disposed along the width direction, the height direction or other directions of the housing 1 according to different positional relationships between the air inlet 300 and the opening 3, and accordingly, the communication structure 23 may also be disposed along the width direction, the height direction or other directions of the housing 1.

For convenience of description, in the present embodiment, as shown in fig. 3, an air inlet 300 and an opening 3 are distributed up and down for an exemplary illustration. The partition plate 22 is disposed along the width direction of the casing 1 and connected to the casing 1 so as to partition the cavity structure 4 into an upper first cavity 41 and a lower second cavity 42, and the communicating structure 23 is disposed on the partition plate 22 and communicates the first cavity 41 with the second cavity 42.

It should be noted that the communicating structure 23 may be a hole structure provided on the partition plate 22, or may be a pipe structure provided on the partition plate 22 and having one end communicating with the first cavity 41 and the other end communicating with the second cavity 42, which is not limited herein, and in addition, one or more communicating structures 23 may be provided, and a plurality of communicating structures 23 are provided at intervals in the width direction of the housing 1.

As shown in fig. 3, the width direction of the housing 1 is the X-axis direction, and the height direction of the housing 1 is the Z-axis direction.

Thus, after the noise is transmitted into the first cavity 41 from the air inlet 300, because the sectional areas of the first cavity 41 and the communicating structure 23 are different, only the sound wave with the frequency matched with the sectional area of the communicating structure 23 can pass through the communicating structure 23 and be transmitted into the second cavity 42, and the rest sound wave which cannot pass through the communicating structure 23 is reflected back and forth in the first cavity 41, one part of the sound wave is absorbed by the sound-deadening material 21 on the inner wall of the first cavity 41, and the other part of the sound wave is converted into heat energy due to friction and is dissipated, so that the noise of the inverter can be further reduced, and the sound quality can be improved.

Optionally, the cross-sectional area of the air inlet 300 is smaller than the cross-sectional area of the first cavity 41, and the cross-sectional area of the communicating structure 23 is smaller than the cross-sectional area of the first cavity 41, and/or the cross-sectional area of the communicating structure 23 is smaller than the cross-sectional area of the second cavity 42, and the cross-sectional area of the opening 3 is smaller than the cross-sectional area of the second cavity 42.

As shown in fig. 3, 5, 6 and 8, in the present embodiment, the cross-sectional area S of the air inlet 300 ₁₀ The area of the air inlet 300 projected on the XZ plane, the sectional area S11 of the first cavity 41 is the area of the first cavity 41 projected on the XZ plane, the sectional area S20 of the communicating structure 23 is the area of the communicating structure 23 projected on the XY plane, the sectional area S21 of the second cavity 42 is the area of the second cavity 42 projected on the XY plane, and the sectional area S22 of the opening 3 is the area of the opening 3 projected on the XY plane.

It should be noted that, when the first cavity 41 and the second cavity 42 are irregular cavities with different projection areas of each cross section on the corresponding surfaces, the structural form of the cavities should match with the communication structure matching with the cavities to satisfy the working principle of the expanding muffler, which is common knowledge and will not be described herein again.

Optionally, the communicating structure 23 is a silencing tube, one end of the silencing tube is communicated with the first cavity 41, and the other end of the silencing tube is communicated with the second cavity 42.

As shown in fig. 3 and 5, in the present embodiment, the silencing tube is a tubular structure with a hollow interior and two ends penetrating each other, and the cross-sectional shape thereof may be a square shape, a circular shape, or various combined shapes thereof, which is not limited herein.

Be equipped with the shape assorted through-hole structure with the hush pipe on the baffle 22, the hush pipe alternates in through-hole structure and accessible welding, modes such as riveting or bolted connection are connected with baffle 22, the one end and the 41 intercommunication of first cavity of hush pipe, the other end and second cavity 42 intercommunication, thereby make the air can circulate between first cavity 41 and second cavity 42 and not influence the radiating effect of dc-to-ac converter, and simultaneously, can also filter the noise that fan assembly 200 produced, thereby reduce the noise of dc-to-ac converter, improve the sound quality.

Optionally, the silencing structure 2 further includes a plurality of baffles 24, the baffles 24 are provided in plurality, the baffles 24 are arranged in the cavity structure 4 at intervals and divide the air duct into a plurality of independent air ducts, and the plurality of independent air ducts are arranged in one-to-one correspondence with the plurality of fans 201 of the fan assembly 200.

As shown in fig. 4, in the present embodiment, for example, the fan assembly 200 is disposed along the width direction of the inverter, a baffle plate 24 disposed along the height direction of the housing 1 may be disposed in the cavity structure 4, a plurality of baffle plates 24 are disposed at intervals, and each fan 201 is disposed between two adjacent baffle plates 24 or at a gap between the baffle plate 24 and the left and right wall plates, so as to divide the air duct into a plurality of independent air ducts corresponding to the fans 201 one-to-one.

Like this, because fan assembly 200 is formed by the combination of a plurality of fans 201, separate into a plurality of independent wind channels with the wind channel through set up a plurality of baffles 24 in cavity structures 4, can avoid the noise that each fan 201 produced to superpose each other to further reduce the noise that fan assembly 200 produced, improve the sound quality of dc-to-ac converter.

Optionally, the silencing structure 2 includes a partition 22, a communicating structure 23 and a baffle 24, where the communicating structure 23 is a plurality of silencing pipes, the plurality of silencing pipes are arranged in one-to-one correspondence with the plurality of fans 201, and a cross-sectional area of each silencing pipe is not less than a cross-sectional area of the air inlet 300 of the corresponding fan 201.

As shown in fig. 5 and 8, in the present embodiment, a partition plate 22, a communicating structure 23 and baffle plates 24 are simultaneously disposed in the cavity structure 4, the communicating structure 23 employs silencing tubes, the partition plate 22 and the baffle plates 24 are disposed in a crossed manner, and one silencing tube is disposed between two adjacent baffle plates 24 and at the gap between the baffle plate 24 and the left and right wall plates.

It should be noted that, in order to avoid weakening the heat dissipation effect of the inverter due to the influence of the sound-deadening duct on the intake volume of each fan 201, the projected area of the sound-deadening duct on the XY plane should be not less than the projected area of the intake opening 300 of the corresponding fan 201 on the XZ plane.

In order to further improve the noise reduction effect of the inverter, the sound deadening material 21 may be provided on the inner wall of the case 1, and the sound deadening material 21 may be provided on the outer walls of the partition plate 22, the communicating structure 23, the baffle plate 24, and the rear cover 100, and the sound deadening structures 2 of the above-described various embodiments may be provided in combination as necessary.

Another embodiment of the present invention provides an inverter, which comprises a rear cover 100, a fan assembly 200 and the above-mentioned noise reduction air duct structure.

As shown in fig. 1, 7 and 8, in this embodiment, an air inlet 300 for allowing the fan assembly 200 to enter air is disposed at a position close to the middle of the rear cover 100, the fan assembly 200 is disposed in a casing of the inverter and at a position corresponding to the air inlet 300, a screw hole is disposed at an edge of the rear cover 100, the casing 1 of the noise-reduction air channel structure shields the air inlet 300 and is fixed on the rear cover 100 by a screw, a certain gap is maintained between the casing 1 and the rear cover 100 to form a cavity structure 4 with an opening 3, the cavity structure 4 is communicated with the air inlet 300 to form an air channel, the noise-reduction structure 2 of the noise-reduction air channel structure is disposed in the cavity structure 4, after the noise generated by the fan assembly 200 is transmitted into the cavity structure 4 through the air inlet 300, the noise reduction structure 2 can treat noise and reduce the noise transmitted from the opening 3, so that the noise of the inverter is smaller, and the sound quality of the inverter is improved.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to fall within the scope of the present disclosure.

Claims (10)

1. The utility model provides a amortization wind channel structure for the dc-to-ac converter, characterized in that, including casing (1) and amortization structure (2), casing (1) sets up on back lid (100) of dc-to-ac converter, and with back lid (100) form cavity structure (4) that have opening (3) together, cavity structure (4) with air intake (300) intercommunication of fan assembly (200) of dc-to-ac converter forms the wind channel, amortization structure (2) set up in cavity structure (4).

2. The structure of claim 1, wherein the casing (1) comprises a shell plate (11) and a wall plate (12), the wall plate (12) is disposed along the circumferential direction of the shell plate (11) and forms the opening (3), one end surface of the wall plate (12) is connected to the shell plate (11), the other end surface of the wall plate (12) is connected to the rear cover (100), and the sound-deadening structure (2) comprises a sound-deadening material (21), and the sound-deadening material (21) is disposed on the inner wall of the shell plate (11) and/or the wall plate (12).

3. The muffling air channel structure according to claim 2, wherein the muffling structure (2) further comprises a partition plate (22) and a communicating structure (23), the partition plate (22) is disposed on the housing (1) and divides the cavity structure (4) into a first cavity (41) and a second cavity (42), the first cavity (41) is communicated with the air inlet (300), the second cavity (42) is communicated with the opening (3), and the communicating structure (23) is disposed on the partition plate (22) and is adapted to communicate the first cavity (41) with the second cavity (42).

4. The muffling air channel structure according to claim 3, wherein a cross-sectional area of the air inlet (300) is smaller than a cross-sectional area of the first cavity (41), and a cross-sectional area of the communicating structure (23) is smaller than a cross-sectional area of the first cavity (41).

5. A sound-damping air duct structure according to claim 3 or 4, characterized in that the cross-sectional area of the communicating structure (23) is smaller than the cross-sectional area of the second cavity (42), and the cross-sectional area of the opening (3) is smaller than the cross-sectional area of the second cavity (42).

6. A muffling air channel structure according to claim 3, wherein the communicating structure (23) is a muffling pipe, one end of which communicates with the first cavity (41) and the other end of which communicates with the second cavity (42).

7. The muffling air channel structure according to claim 2 or 3, wherein the muffling air channel structure (2) further comprises a plurality of baffles (24), the plurality of baffles (24) are arranged in the cavity structure (4) at intervals and divide the air channel into a plurality of independent air channels, and the plurality of independent air channels are arranged in one-to-one correspondence with the plurality of fans (201) of the fan assembly (200).

8. The structure of the silencing air duct according to claim 7, wherein the silencing structure (2) comprises a partition plate (22), a communicating structure (23) and the baffle plate (24), the communicating structure (23) is a plurality of silencing pipes, and the plurality of silencing pipes are arranged in one-to-one correspondence with the plurality of fans (201).

9. The structure of claim 8, wherein the cross-sectional area of each silencing pipe is not smaller than the cross-sectional area of the air inlet (300) of the fan (201) corresponding to the silencing pipe.

10. An inverter, characterized by comprising a rear cover (100), a fan assembly (200) and a muffling air channel structure according to any one of claims 1 to 9.

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