CN112319396B

CN112319396B - Enclose sound insulation pad subassembly and car before in car

Info

Publication number: CN112319396B
Application number: CN202011368270.XA
Authority: CN
Inventors: 汪苗; 屈龙洋; 王一帆; 郭正默
Original assignee: Anhui Jianghuai Automobile Group Corp
Current assignee: Anhui Jianghuai Automobile Group Corp
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2022-10-21
Anticipated expiration: 2040-11-27
Also published as: CN112319396A

Abstract

The invention discloses a front wall sound insulation pad assembly in an automobile and the automobile, wherein the front wall sound insulation pad assembly in the automobile comprises a sound insulation pad and a temperature regulating part, and the temperature regulating part is arranged in the sound insulation pad and used for regulating the temperature of the sound insulation pad to be within a preset temperature range. According to the automobile inner front wall sound insulation pad assembly, the sound insulation pad is in the temperature range with better sound insulation effect through the arrangement of the temperature adjusting piece, so that the sound insulation effect of the automobile inner front wall sound insulation pad assembly is improved.

Description

Enclose sound insulation pad subassembly and car before in car

Technical Field

The invention relates to the technical field of automobile accessories, in particular to a front wall sound insulation pad assembly in an automobile and the automobile.

Background

With the continuous innovation of vehicle manufacturing technology, drivers and passengers are more concerned about vehicle noise, and particularly, the noise level of a cab directly influences the comfort of the vehicle. The inner front wall sound insulation pad serves as an interior trim part of the automobile and plays a role in blocking the transmission path of noise such as engine noise and air conditioner compressor and the like in the automobile. In the driving process, the sound insulation performance of the sound insulation pad of the inner front wall plays an important role in the size of noise in the vehicle.

At present, the sound insulation performance of the inner front wall sound insulation pad is improved as much as possible mainly by any combination of conventional sound absorption materials and sound insulation materials, however, the improvement degree of the sound insulation effect of the inner front wall sound insulation pad is limited by the method.

Disclosure of Invention

The invention mainly aims to provide a sound insulation pad assembly for an inner front wall of an automobile and the automobile, and aims to solve the problem that the sound insulation effect of the existing inner front wall sound insulation pad cannot be further improved.

In order to achieve the above object, the present invention provides an automotive dash sound-proof mat assembly, comprising:

a sound insulating pad; and the number of the first and second groups,

the temperature adjusting piece is arranged in the sound insulation pad and used for adjusting the temperature of the sound insulation pad to a preset temperature.

Optionally, the sound insulation pad comprises a sound absorption layer and a sound insulation layer which are sequentially stacked, and the temperature adjusting piece is embedded in the sound absorption layer and/or the sound insulation layer.

Optionally, the thickness of the sound absorption layer is 10 mm-30 mm, and the temperature adjusting piece is arranged on the sound absorption layer.

Optionally, the sound insulation pad comprises a sound absorption layer and a sound insulation layer which are sequentially stacked, and the temperature adjusting piece is arranged between the sound absorption layer and the sound insulation layer.

Optionally, the sound insulation layer is made of at least one of hard felt and EVA; and/or the presence of a gas in the gas,

the sound absorption layer is made of at least one of polyurethane, felt and ethylene propylene diene monomer.

Optionally, the temperature adjustment member comprises a heating coil;

enclose acoustic pad subassembly in the car and still include temperature sensor and controller, temperature sensor is used for detecting the temperature of acoustic pad, the controller with heating coil with temperature sensor electric connection, with temperature sensor detects the temperature that acoustic pad is less than when predetermineeing the temperature, control heating coil work.

Optionally, the heating coil has a plurality of bending sections and a plurality of direct current sections, the plurality of bending sections are bent by 180 degrees, and a gap is provided between the direct current sections.

Optionally, the temperature adjusting part further comprises a cooling water pipe, the cooling water pipe is used for being communicated with an air conditioner evaporator of an automobile, and a valve is arranged in a pipeline of the cooling water pipe;

the controller with valve electric connection to when temperature sensor detected the temperature of sound insulation pad is higher than preset temperature, control the valve is opened, so that let in cooling water in the condenser tube.

Optionally, the cooling water pipe has a plurality of bending sections and a plurality of direct current sections, the bending sections are bent by 180 degrees, and a gap is formed between the direct current sections.

The invention also provides an automobile which comprises the automobile inner front wall sound insulation pad assembly.

According to the technical scheme, the sound insulation pad assembly of the front wall in the automobile comprises a sound insulation pad and a temperature adjusting piece, the temperature adjusting piece is arranged in the sound insulation pad and used for adjusting the temperature of the sound insulation pad to be within a preset temperature range, and the sound insulation pad is located within the temperature range with a better sound insulation effect through the temperature adjusting piece, so that the sound insulation effect of the sound insulation pad assembly of the front wall in the automobile is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of an automotive interior dash acoustic mat assembly according to the present invention;

FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a result of a sound insulation test of the automobile interior cowl acoustic pad assembly of FIG. 1 in an anechoic room-reverberation room;

FIG. 5 is a graph showing a comparison of the noise generated by the acoustic insulator assembly for an automobile interior cowl at different temperatures.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Enclose sound insulation pad subassembly before car	2	Temperature regulating member
1	Sound insulation pad	21	Heating coil
				11	Sound absorption layer	22	Cooling water pipe
12	Sound insulation layer	23	Controller for controlling a motor

The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

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

It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; etc.) are involved in the embodiment of the present invention, the directional indications are only used for explaining the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B", including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

At present, the sound insulation performance of the inner front wall sound insulation pad is improved as much as possible mainly by any combination of conventional sound absorption materials and sound insulation materials, however, the improvement degree of the sound insulation effect of the inner front wall sound insulation pad is limited by the method. In view of the above, the present invention provides an automotive interior dash acoustic pad assembly.

Referring to fig. 1 to 3, in an embodiment, a sound-insulating mat assembly 100 for a front wall of a vehicle includes a sound-insulating mat 1 and a temperature-adjusting member 2, wherein the temperature-adjusting member 2 is disposed in the sound-insulating mat 1 for adjusting a temperature of the sound-insulating mat 1 to a predetermined temperature range. Therefore, the sound insulation pad 1 can be free from the limitation of the working environment inside and outside the vehicle, the temperature of the sound insulation pad 1 is automatically kept, and the sound insulation pad 1 is ensured to be in a better sound insulation performance state.

In the technical scheme provided by the invention, the sound insulation pad 1 is in a temperature range with better sound insulation effect through the arrangement of the temperature regulating piece 2, so that the sound insulation effect of the front wall sound insulation pad assembly 100 in the automobile is improved.

In order to improve the sound absorption performance of the front wall sound insulation pad assembly 100 in the automobile, the sound insulation pad 1 comprises a sound absorption layer 11 and a sound insulation layer 12 which are sequentially stacked, and the temperature adjusting piece 2 is arranged in the sound absorption layer 11 and/or the sound insulation layer 12. That is, the temperature adjusting member 2 may be provided on the sound absorbing layer 11, may be provided on the sound insulating layer 12, or may be provided in both the sound absorbing layer 11 and the sound insulating layer 12.

In another embodiment of the invention, the sound insulation pad 1 comprises a sound absorption layer 11 and a sound insulation layer 12 which are sequentially stacked, and the temperature adjusting piece 2 is arranged between the sound absorption layer 11 and the sound insulation layer 12, so that the temperature adjusting piece 2 is close to the sound absorption layer 11 and the sound insulation layer 12, and the temperature of the sound insulation pad 1 can be better adjusted.

The sound absorbing layer 11 and the sound insulating layer 12 are provided in this order from the inner front wall panel of the automobile toward the inside of the automobile. In addition, the sheet metal of the front wall panel in the automobile also plays a role of the sound insulation layer 12, so that in the embodiment, the front wall in the automobile plays a sound insulation role in a 3-layer structure, namely, separation-suction-separation, and the effect is better.

Further, in the present embodiment, the thickness of the sound absorption layer 11 is 10 to 30mm. Since the entire thickness of the soundproof pad 1 is not large, and the temperature adjusting member 2 is provided to the sound absorbing layer 11 in view of cost and convenience in installation.

The present invention does not limit the specific structure of the temperature adjusting member 2 as long as the temperature of the soundproof pad 1 can be adjusted to a preset temperature. It can be understood that the preset temperature of the soundproof mat 1 is a temperature at which the soundproof effect is good and the consumed power is relatively low. The sound insulation effect of the automobile inner front wall sound insulation pad assembly 100 is tested in an anechoic chamber-reverberation chamber, specifically, after the automobile inner front wall sound insulation pad assembly 100 is adjusted to the temperature to be tested, heat insulation cotton is paved on two sides for heat insulation, then the temperature of a laboratory is rapidly adjusted to 20 ℃ by using an air conditioner, meanwhile, the temperature of the automobile inner front wall sound insulation pad assembly 100 is maintained at the temperature to be tested, white noise is emitted by a medium-high frequency volume sound source and passes through the automobile inner front wall sound insulation pad assembly 100 arranged between the reverberation chamber and the anechoic chamber, then a tester scans the sound insulation performance of the automobile inner front wall sound insulation pad assembly 100 through a test receiving device in the anechoic chamber, and the test result is shown in figure 4.

Referring to fig. 4, the test results show that the temperature has a great influence on the sound insulation of the automobile interior front wall sound insulation pad assembly 100, the sound insulation amount of the automobile interior front wall sound insulation pad assembly 100 at 0 ℃ and 30 ℃ has a 2-6dB difference within 8000Hz, and when the temperature is increased to 45 ℃ from 30 ℃, the sound insulation effect is improved a little, and about 1-2dB is obtained; the temperature is increased from 45 ℃ to 60 ℃, and the sound insulation quantity is reduced by 2-3dB; the temperature is increased from 60 ℃ to 75 ℃, and the sound insulation quantity is reduced by 3-6dB. In the acoustic mat 1 provided in the present embodiment, the preset temperature of the temperature-adjusting member 2 is about 30 deg.c in view of reducing power consumption and improving comfort of the driver and passengers.

Further, the temperature adjusting member 2 includes a heating coil 21; enclose acoustic pad subassembly 100 in car still includes temperature sensor (not shown in the figure) and controller 23, and temperature sensor is used for detecting the temperature that gives sound insulation and fills up 1, controller and heating coil 21 and temperature sensor electric connection to when temperature sensor detects the temperature that gives sound insulation and fills up 1 and be less than preset temperature, control heating coil 21 work. Specifically, the optimum temperature according to the test of the automobile interior dash sound insulation pad assembly 100 is inputted into the controller 23, one side of the controller 23 is connected with a vehicle body circuit (not shown in the figure) for supplying power, and the other side is electrically connected with the temperature sensor and the heating coil 21, when the temperature sensor detects that the temperature of the sound insulation pad 1 is lower than the preset temperature, the heating coil 21 is electrified to start the heating function; when the temperature sensor detects that the temperature of the soundproof pad 1 is higher than the preset temperature, the power is cut off to turn off the heating function. When the automobile is in a low-temperature environment, such as extreme weather in the north, the engine of the automobile is ignited to a normal thermal cycle, and about half an hour is needed, at the moment, the temperature regulating part 2 provided by the invention can quickly heat the sound insulation pad 1 to a preset temperature, so that the sound insulation effect of the front wall sound insulation pad assembly 100 in the automobile is better.

Further, in winter, when the outside temperature is 0 ℃, a noise sensor is arranged in the automobile, the noise in the automobile is tested when the temperature of the front wall sound insulation pad assembly 100 in the automobile is respectively 0 ℃ and 30 ℃ under the constant speed working condition of 100km/h, the test result is shown in fig. 5, and as can be seen from fig. 5, when the temperature of the front wall sound insulation pad assembly 100 in the automobile is 30 ℃, the sound pressure level is reduced by 1.2dB (A) compared with the temperature of 0 ℃, and the noise from 200Hz to 1000Hz is reduced to a certain extent in frequency spectrum. Thus, the test results demonstrate that the sound insulation performance of the dash acoustic pad assembly 100 in the automobile can be improved by adjusting the temperature.

In addition, because the sound insulation pad assembly 100 of the front wall in the automobile is close to the engine and is subjected to more heat radiated by the engine, and when the thermal cycle of the engine is stabilized, the temperature of the front wall in the automobile may be higher than 30 ℃, in this embodiment, the temperature adjustment member 2 further includes a cooling water pipe 22, the cooling water pipe 22 is used for communicating with an evaporator of an air conditioner, and a valve (not shown in the figure) is arranged in a pipeline of the cooling water pipe 22; the controller is electrically connected with the valve, so that when the temperature sensor detects that the temperature of the sound insulation pad is higher than the preset temperature, the control valve is opened, cooling water is introduced into the cooling water pipe, and the sound insulation pad 1 is cooled. Preferably, the number of the valves is two, and the two valves are respectively arranged at the outlet and the inlet of the cooling water pipe. It can be understood that the automobile interior front wall sound insulating pad assembly 100 provided by the invention mainly operates the heating coil in cold weather, and the cooling water pipe operates in a shorter time.

Specifically, the outlet and the inlet of the cooling water pipe 22 are connected to the branches of the evaporator, and the operation and non-operation of the cooling water pipe 22 are controlled by controlling the opening and closing of the valve. In order to save power, preferably, a control module is arranged between the evaporator and the compressor, the control module comprises a switch and a second controller, the switch is electrically connected with the compressor, the second controller is electrically connected with the switch and the temperature sensor, the second controller controls the switch of the compressor according to the temperature detected by the temperature sensor and the preset temperature, and when the cooling water pipe does not work, the compressor is turned off, so that the power is saved. It should be noted that, the function of the air conditioner itself is preferentially ensured, when the refrigeration module of the air conditioner needs to be used, that is, when the compressor needs to work, the compressor is opened, and at this time, the valve is closed; when the refrigeration module of the air conditioner is not used, namely the compressor is closed, the opening and closing of the compressor are further controlled according to the temperature of the temperature sensor.

Further, in order to make the distribution of the heating water pipe on the sound absorption layer 11 uniform, please refer to fig. 3, the heating coil 21 has a plurality of bending sections and a plurality of direct current sections, the bending sections are bent by 180 degrees, and a gap is provided between the direct current sections. In this way, the contact area between the heating coil 21 and the sound absorbing layer 11 is large, and the temperature can be more quickly transferred to the sound absorbing layer 11, thereby quickly increasing the temperature of the sound insulating mat 1.

In the present embodiment, the cooling water pipe 22 has a plurality of bending sections and a plurality of direct current sections, the plurality of bending sections are bent by 180 degrees, and gaps are provided between the direct current sections. The principle is similar to the arrangement principle of the heating coil 21, and is not described herein.

The invention is not limited to the materials of the sound absorption layer 11 and the sound insulation layer 12, and in the embodiment, the material of the sound insulation layer 12 includes at least one of a hard felt and EVA (ethylene vinyl acetate copolymer); and/or the material of the sound absorption layer 11 comprises at least one of polyurethane, felt and ethylene propylene diene monomer. The materials can be combined at will in consideration of the influence of cost, sound insulation performance of the materials and temperature on the sound insulation effect of the materials, so as to obtain the sound insulation pad 1 required by a user.

The invention also provides an automobile which comprises the automobile inner front wall sound insulation pad assembly 100. The concrete structure of the automobile interior front wall sound-insulating pad assembly 100 refers to the above embodiments, and since the automobile of the present invention adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a preceding sound-insulating pad subassembly that encloses in car, preceding enclose in the car and be provided with preceding wallboard in the car, its characterized in that includes:

an acoustic insulating mat having one side surface in contact with the automobile interior front wall panel; and the number of the first and second groups,

the temperature adjusting piece is arranged in the sound insulation pad and used for adjusting the temperature of the sound insulation pad to a preset temperature;

the temperature adjusting member includes a heating coil;

the automobile interior front wall sound insulation pad assembly further comprises a temperature sensor and a controller, the temperature sensor is used for detecting the temperature of the sound insulation pad, and the controller is electrically connected with the heating coil and the temperature sensor so as to control the heating coil to work when the temperature sensor detects that the temperature of the sound insulation pad is lower than the preset temperature;

the temperature regulating part also comprises a cooling water pipe, the cooling water pipe is used for being communicated with an air conditioner evaporator of an automobile, and a valve is arranged in a pipeline of the cooling water pipe;

the controller is electrically connected with the valve so as to control the valve to be opened when the temperature sensor detects that the temperature of the sound insulation pad is higher than the preset temperature, so that cooling water is introduced into the cooling water pipe;

the sound insulation pad comprises a sound absorption layer and a sound insulation layer which are sequentially stacked, the thickness of the sound absorption layer is 10-30 mm, and the surface of one side, which deviates from the sound insulation layer, of the sound absorption layer is in contact with the front wall plate in the automobile.

2. The automobile dash acoustic mat assembly according to claim 1, wherein the temperature-adjusting member is embedded in the sound-absorbing layer and/or the sound-insulating layer.

3. The automobile dash acoustic mat assembly according to claim 1, wherein the temperature-adjusting member is provided between the sound-absorbing layer and the sound-insulating layer.

4. The automotive dash acoustic mat assembly according to claim 2 or 3, wherein the acoustic insulating layer comprises at least one of a hard felt and EVA; and/or the presence of a gas in the gas,

5. The automobile interior front wall sound insulating pad assembly as claimed in claim 1, wherein said heating coil has a plurality of bending sections and a plurality of direct current sections, said bending sections are bent at 180 degrees, and a gap is provided between said direct current sections.

6. The sound-insulating pad assembly for a dash panel in a vehicle according to claim 1, wherein the cooling water tube has a plurality of bent sections and a plurality of straight sections, the bent sections are bent at 180 degrees, and a gap is provided between the straight sections.

7. An automobile, characterized by comprising the automobile dash acoustic insulator mat assembly according to any one of claims 1 to 6.