CN110066374B

CN110066374B - Compressor silencing tube

Info

Publication number: CN110066374B
Application number: CN201910274924.3A
Authority: CN
Inventors: 杜丹
Original assignee: Guangzhou Northen New Materials Technology Co ltd
Current assignee: Guangzhou Northen New Materials Technology Co ltd
Priority date: 2019-04-04
Filing date: 2019-04-04
Publication date: 2020-06-30
Anticipated expiration: 2039-04-04
Also published as: CN110066374A

Abstract

The invention discloses a compressor silencing barrel, which comprises the following raw materials in parts by weight: 100 parts of polyol, 53-58 parts of isocyanate, 2-4 parts of silicone oil, 1-3 parts of flame retardant, 0.5-1.5 parts of color paste, 0.5-1.5 parts of water and 0.2-0.8 part of foaming catalyst; the isocyanate is self-skinning isocyanate. The compressor noise silencing barrel is excellent in acoustic performance, integrally formed and easy to install, noise of the compressor can be effectively reduced from radiating outwards through the assembly of the noise silencing barrel, and the problems of pulverization and mildew of a noise reduction product of a traditional air conditioner compressor are solved. The compressor silencing barrel has good noise reduction effect which can reach more than 4 dB.

Description

Compressor silencing tube

Technical Field

The invention relates to a silencing part, in particular to a compressor silencing barrel.

Background

With the increasing requirements of people on the quality of life, the noise index of products becomes a crucial technical requirement in the field of household appliances. The noise level of household appliance products affects the purchase of consumers to some extent. Therefore, the noise of the household appliances is more and more concerned by the host manufacturers.

The compressor of the household appliance is a main noise source, so the research on the noise of the household appliance focuses on the noise control of the compressor.

The sources and components of compressor noise are complex, including structural noise, aerodynamic noise, and electromagnetic noise generated by the motor. In the compressor noise control field, the current main research direction is to carry out the optimization of structure in order to reach the purpose of noise reduction to the compressor to and the mode that adopts the material of making an uproar to fall the noise of wrapping up the compressor, but in the research that a great deal of material of making an uproar falls, all adopt the sound insulation layer and the hair felt class product of sheet class to make up, in a set of sound proof cover, it reaches the effect of making an uproar to need two or more than two products to wrap up the compressor usually, the product is mostly through processes such as tailor, bonding and make up, the production mode falls behind, and the installation must rely on manual assembly, inefficiency.

The periphery of the compressor is in a high-temperature and high-humidity environment, and the traditional felts are easy to absorb water and age to cause the reduction of acoustic performance and generate chalking and mildewing.

In summary, how to design a novel noise reduction product meets the noise reduction requirement and improves the production and use efficiency of the product, which becomes a problem to be solved urgently by technical personnel of acoustic materials and products.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a compressor silencing tube.

In order to achieve the purpose, the invention adopts the technical scheme that: the compressor silencing barrel includes one self-skinning surface layer and one foamed microporous layer, which is foamed with isocyanate and polyol.

The material of the compressor silencing barrel is selected from isocyanate and polyalcohol which can realize self-skinning,

the material of the compressor silencing pot is selected from isocyanate and polyalcohol which can realize self-skinning, and the density of the prepared silencing pot is 60-100kg/m³The compressor silencer is shown in figure 1, and comprises a self-skinning surface layer 1 and a microporous foam layer 2. The foamed microporous layer of the silencing cylinder is mainly used for absorbing high-frequency noise of the compressor, and the sound absorption principle is that sound waves are in a porous sound absorption material, and due to friction and viscous resistance, the sound energy is converted into heat energy to be dissipated, so that the sound absorption purpose is achieved; meanwhile, the surface of the silencing barrel is a layer of elastic film, most of low-frequency noise is vibration noise, and the low-frequency noise is transmitted to the silencing barrel. The vibration of the sound wave drives the vibration of the epidermis, and the epidermis has elasticity, and the vibration sound wave makes the epidermis produce damping motion, and the peristalsis of partial molecule in the epidermis causes the molecule friction, and the sound wave energy conversion molecule internal energy to reach the purpose of reducing the noise. In addition, the skinning structure on the surface of the silencing barrel prevents the product from absorbing water and mildewing, ensures the product quality, provides better acoustic performance and can be suitable for high-humidity environment.

As a preferred embodiment of the compressor silencing barrel, the silencing barrel comprises the following raw materials in parts by weight: 100 parts of polyol, 53-58 parts of isocyanate, 2-4 parts of silicone oil, 1-3 parts of flame retardant, 0.5-1.5 parts of color paste, 0.5-1.5 parts of water and 0.2-0.8 part of foaming catalyst; the polyol is polyether polyol, and the isocyanate is diphenylmethane diisocyanate. Through repeated experimental research, the inventor finds that the self-skinning material obtained by the reaction of polyether polyol and diphenylmethane diisocyanate has the best silencing effect, and can prepare the silencing barrel material with excellent silencing effect under mild conditions under the formula. In a preferred embodiment of the compressor silencer according to the present invention, the flame retardant is tris (2-chloropropyl) phosphate.

In a preferred embodiment of the compressor muffler according to the present invention, the blowing catalyst is monochlorodifluoromethane.

As a preferred embodiment of the compressor silencing barrel, the silencing barrel comprises the following raw materials in parts by weight: 100 parts of polyol, 55 parts of isocyanate, 3 parts of silicone oil, 2 parts of flame retardant, 1 part of color paste, 1 part of water and 0.5 part of foaming catalyst. The silencing tube prepared by the proportion has the best silencing effect and moisture-proof effect.

As a preferred embodiment of the compressor silencing pot of the present invention, the preparation method of the compressor silencing pot comprises the following steps:

(1) coating a release agent on the surface of the mould contacted with the raw material of the silencing cylinder;

(2) injecting the raw materials of the silencing cylinder into a mould for foaming and curing;

(3) and opening the die, and taking out the product to obtain the compressor silencing barrel.

The raw materials of the silencing barrel are foamed in the die, the obtained product is a whole, the obtained product can be directly sleeved on the installed compressor, the efficiency is high, the convenience is realized, the automatic assembly can be realized, and the subsequent assembly process is not influenced.

As a preferred embodiment of the compressor silencer according to the present invention, the mold includes a left mold, a right mold, an upper mold, and a mold core, and the left mold, the right mold, the upper mold, and the mold core are connected by a detachable connecting member; the left die and the right die are matched, and a cavity for forming the silencing barrel is formed by gaps among the left die, the right die, the upper die and the die core.

When the mould is closed for foaming, the left mould, the right mould and the upper mould are closed and connected to form a cylindrical structure, and the silencing cylinder is formed in the cavity; when the die is opened, the left die, the right die and the upper die are connected and disassembled, the formed silencing barrel is taken out from the die core, and proper trimming can be carried out to obtain the silencing barrel. Adopt the mode die sinking of above-mentioned "three die sinking" to handle, the amortization section of thick bamboo appearance can realize diversified, only needs according to usable space, and affiliated pipeline structure designs mould die cavity size and structure, need not to consider the result back-off, all can integrated into one piece, realizes wrapping up in the noise source outside of required parcel completely. Due to the adoption of the integral design method of the die, the rest parts of the compressor silencing tube except the pipeline opening are in integral sealing design, and the sound leakage is reduced, so that the compressor silencing tube can have excellent acoustic effect.

In a preferred embodiment of the compressor silencer according to the present invention, the thickness of the compressor silencer is 15 to 20 mm. The thickness can ensure that the silencing barrel has better silencing effect and lower cost.

In a preferred embodiment of the compressor muffler according to the present invention, in the step (2), the foaming and aging conditions are: the material temperature is 28-32 ℃, and the mold temperature is 42-46 ℃.

The invention has the beneficial effects that: the invention provides a compressor silencing barrel. The compressor noise silencing barrel is excellent in acoustic performance, integrally formed and easy to install, noise of the compressor can be effectively reduced from radiating outwards through the assembly of the noise silencing barrel, and the problems of pulverization and mildew of a noise reduction product of a traditional air conditioner compressor are solved. The compressor silencing barrel has good noise reduction effect which can reach more than 4 dB.

Drawings

FIG. 1 is a schematic structural view of a section of a silencing pot of the compressor;

FIG. 2 is a schematic view of the mold; FIG. A shows the closed-mold foaming state; FIG. B shows the mold opened;

wherein, 1, self-skinning surface layer; 2. a foamed microporous layer; 3. a left die; 4. a right die; 5. an upper die; 6. and (5) a mold core.

Detailed Description

To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.

Example 1

The invention discloses an embodiment of a compressor silencing barrel, which is prepared from the following raw materials in parts by weight: 100 parts of polyether polyol, 55 parts of diphenylmethane diisocyanate, 3 parts of silicone oil, 2 parts of tris (2-chloropropyl) phosphate, 1 part of color paste, 1 part of water and 0.5 part of monofluoro dichloromethane.

The preparation method of the compressor silencing barrel comprises the following steps:

(2) inputting the raw materials of the silencing cylinder into a mixing kettle through a metering pump, fully and uniformly mixing, injecting into a mould for foaming and curing, wherein the injection speed is 120 g/s;

The structure sketch of the mould is shown in figure 2, and comprises a left mould 3, a right mould 4, an upper mould 5 and a mould core 6, wherein the left mould 3 is matched with the right mould 4, the left mould 3, the right mould 4 and the upper mould 5 are detachably connected, and a cavity for forming the silencing pot is formed by gaps among the left mould 3, the right mould 4, the upper mould 5 and the mould core 6. When the mould is closed for foaming, the left mould 3, the right mould 4 and the upper mould 5 are closed and connected to form a cylindrical structure (as shown in a figure A), and the silencing tube is formed in the cavity; when the mould is opened, the connection among the left mould 3, the right mould 4 and the upper mould 5 is disassembled, the formed silencing tube is taken out from the mould core 6, the arrow in the figure A is the direction of opening the mould, and the mould is opened as shown in the figure B, so that the silencing tube is obtained.

Example 2

The invention discloses an embodiment of a compressor silencing barrel, which is prepared from the following raw materials in parts by weight: 100 parts of polyether polyol, 53 parts of diphenylmethane diisocyanate, 2 parts of silicone oil, 3 parts of tris (2-chloropropyl) phosphate, 0.5 part of color paste, 0.5 part of water and 0.2 part of monofluoro dichloromethane.

The preparation method of the compressor silencing pot is the same as that of the embodiment 1.

Example 3

The invention discloses an embodiment of a compressor silencing barrel, which is prepared from the following raw materials in parts by weight: 100 parts of polyether polyol, 58 parts of diphenylmethane diisocyanate, 4 parts of silicone oil, 1 part of tris (2-chloropropyl) phosphate, 1.5 parts of color paste, 1.5 parts of water and 0.8 part of monofluoro methylene chloride.

Example 4

The invention discloses an embodiment of a compressor silencing barrel, which is prepared from the following raw materials in parts by weight: 100 parts of polyether polyol, 53 parts of diphenylmethane diisocyanate, 3 parts of silicone oil, 2 parts of tris (2-chloropropyl) phosphate, 1 part of color paste, 1 part of water and 0.5 part of monofluoro dichloromethane.

Example 5

The invention discloses an embodiment of a compressor silencing barrel, which is prepared from the following raw materials in parts by weight: 100 parts of polyether polyol, 58 parts of diphenylmethane diisocyanate, 3 parts of silicone oil, 2 parts of tris (2-chloropropyl) phosphate, 1 part of color paste, 1 part of water and 0.5 part of monofluoro dichloromethane.

Example 6

The invention discloses an embodiment of a compressor silencing barrel, which is prepared from the following raw materials in parts by weight: 100 parts of polyether polyol, 56 parts of diphenylmethane diisocyanate, 3 parts of silicone oil, 2 parts of tris (2-chloropropyl) phosphate, 1 part of color paste, 1 part of water and 0.5 part of monofluoro dichloromethane.

Comparative example 1

The raw materials of the compressor silencing pot in the comparative example are the same as those in example 1, and the preparation method comprises the following steps: foaming in a specific mould to form a layered foaming material, cutting, bonding and sewing the foaming material to wrap the compressor, thus obtaining the compressor silencing barrel.

Example 7

Fig. 1 shows a schematic structural view of a cross section of the compressor muffling cylinders of examples 1 to 6 and comparative example 1, which is composed of a self-skinning surface layer 1 and a microporous foam layer 2. The compressor test results of the silencing tubes described in the application examples 1-6 and the comparative example 1 are shown in Table 1 according to the engineering method for measuring the approximate free field above the sound power level reflecting surface of the noise source by the GB/T3767 and 1996 acoustic pressure method.

TABLE 1 silencing Effect of silencing tubes according to examples 1 to 6

From the results in table 1, it can be seen that the silencing effect of the material of the compressor silencing tube of the present invention is better, and can reach more than 3dB, wherein the silencing effect of the silencing tube made of the material of example 1 is the best, and the silencing effect of the compressor silencing tube formed by the foaming mold of the present invention through the integral molding method is better.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The compressor silencing barrel is characterized by comprising the following raw materials in parts by weight: 100 parts of polyol, 53-58 parts of isocyanate, 2-4 parts of silicone oil, 1-3 parts of flame retardant, 0.5-1.5 parts of color paste, 0.5-1.5 parts of water and 0.2-0.8 part of foaming catalyst; the polyol is polyether polyol, and the isocyanate is diphenylmethane diisocyanate; the flame retardant is tris (2-chloropropyl) phosphate; the foaming catalyst is monofluoro methylene chloride;

(3) opening the die and taking out the product to obtain the compressor silencing barrel;

the die comprises a left die, a right die, an upper die and a die core, wherein the left die, the right die, the upper die and the die core are connected through a detachable connecting member; the left die and the right die are matched, and a cavity for forming the silencing barrel is formed by gaps among the left die, the right die, the upper die and the die core.

2. The compressor silencing pot of claim 1, wherein the silencing pot comprises the following raw materials in parts by weight: 100 parts of polyol, 55 parts of isocyanate, 3 parts of silicone oil, 2 parts of flame retardant, 1 part of color paste, 1 part of water and 0.5 part of foaming catalyst.

3. The compressor muffler as claimed in claim 1, wherein the thickness of the compressor muffler is 15 to 20 mm.

4. The compressor muffler as defined in claim 1, wherein in the step (2), the foaming and curing conditions are as follows: the material temperature is 28-32 ℃, and the mold temperature is 42-46 ℃.