Compressor protection cover, refrigerator and preparation method

Abstract

The application provides a compressor protective cover, a refrigerator and a preparation method. The compressor protective cover comprises a protective cover base layer and a PVC protective film. The protective cover base layer is a PVC sheet. The PVC protective film is prepared from the following raw materials: 60-70 parts of PVC, 0.3-1 part of capsaicin, 3-8 parts of a plasticizer, 0.5-3 parts of a stabilizer, 0.2-3 parts of a lubricant, 20-30 parts of a filler and 3-5 parts of a color master. The PVC protective film contains capsaicin. The capsaicin can stimulate the oral mucosa and taste nerves of rodents, so that the rodents are prevented from entering the compressor compartment, thereby solving the problem that rodents enter the compressor compartment.

Description

TECHNICAL FIELD

[0001] The application relates to the field of high polymer materials, in particular to a compressor protective cover, a refrigerator and a preparation method. BACKGROUND

[0002] A compressor and corresponding electrical components are arranged inside a refrigerator compressor chamber, in order to increase the safety of the compressor, a protective rear cover is installed outside the compressor chamber. The protective rear cover of the compressor chamber can be made of metal and plastic materials, but due to cost constraints, more plastic materials are used, and the compressor rear cover made of plastic materials such as HIPS (high impact polystyrene), PP (polypropylene) and PVC (polyvinyl chloride) is used. Among them, PVC has good processing performance, and a low-cost protective rear cover with thin thickness, good forming and flame retardance can be obtained by suction forming.

[0003] Although the installation of the protective cover of the compressor increases the safety, but the fire of the refrigerator also occurs, and it is found that a part of the fire is caused by the damage of the PVC compressor protective cover. Due to cost constraints, the thickness of the PVC compressor protective cover is less than 1mm, and the strength is low, which is easy to be bitten by rodents, and after the rodents enter the compressor chamber, the wire harness is bitten, which causes short circuit and fire. SUMMARY

[0004] The application provides a compressor protective cover, a refrigerator and a preparation method to solve the problem of rodents entering the compressor chamber.

[0005] The first aspect of the application provides a compressor protective cover, comprising: a protective cover base layer and a PVC protective film;

[0006] The protective cover base layer is a PVC sheet;

[0007] The protective cover base layer is prepared from the following raw materials by weight: 80-90 parts of PVC resin, 2-5 parts of color masterbatch, 3-7 parts of reinforcing agent, 0.5-2 parts of toughening agent, 1-3 parts of stabilizer, 0.1-1 parts of lubricant, 5-15 parts of filler;

[0008] The PVC protective film is prepared from the following raw materials by weight: 60-70 parts of PVC, 0.3-1 parts of capsaicin, 3-8 parts of plasticizer, 0.5-3 parts of stabilizer, 0.2-3 parts of lubricant, 20-30 parts of filler, and 3-5 parts of color masterbatch.

[0009] The PVC protective film contains capsaicin, which stimulates the oral mucosa and taste nerves of rodents, making rodents feel fear and escape, thereby solving the problem of rodents entering the compressor chamber; and the protective cover base layer does not contain capsaicin, which reduces the influence of capsaicin on the operators in the production process.

[0010] Optionally, the thickness of the PVC protective film is 0.05-0.2mm; the thickness of the protective cover base layer is 0.6-1.5mm.

[0011] The second aspect of the application provides a refrigerator, comprising a cabinet, a compressor and the compressor protective cover of the first aspect, the compressor is arranged in the cabinet, and the compressor protective cover is connected to the cabinet.

[0012] The third aspect of the application provides a compressor protective cover preparation method, comprising:

[0013] 60-70 parts of PVC, 0.3-1 part of capsaicin, 3-8 parts of plasticizer, 0.5-3 parts of stabilizer, 0.2-3 parts of lubricant, 20-30 parts of filler, and 3-5 parts of color master are added into a high-speed mixer for mixing, and a PVC protective film is obtained by extrusion calendering method;

[0014] 80-90 parts of PVC resin, 2-5 parts of color master, 3-7 parts of reinforcing agent, 0.5-2 parts of toughening agent, 1-3 parts of stabilizer, 0.1-1 part of lubricant, and 5-15 parts of filler are added into a high-speed mixer for mixing, and a PVC sheet is obtained by a setting roller, which is a protective cover base layer;

[0015] The PVC sheet and the PVC protective film are combined by online hot lamination to obtain a PVC sheet with PVC protective film;

[0016] The laminated PVC sheet with PVC protective film is formed by suction molding to obtain a compressor protective cover.

[0017] Optionally, the laminated PVC sheet with PVC protective film is formed by suction molding to obtain a compressor protective cover, comprising:

[0018] The laminated PVC sheet with PVC protective film is heated to a softened state;

[0019] The laminated PVC sheet with PVC protective film in a softened state is placed in a suction mold;

[0020] The suction mold cavity is vacuumized to make the laminated PVC sheet with PVC protective film in a softened state adhere to the surface of the suction mold, and a PVC sheet with a shape is obtained;

[0021] The PVC sheet with a shape is cooled to obtain a compressor protective cover.

[0022] Optionally, the PVC protective film comprises:

[0023] The protective film mixture is put into an extruder, and a PVC protective film is obtained, wherein the temperature of the extruder is 160-180 DEG C, and the screw rotation speed interval of the extruder is 11-17 m / min.

[0024] The protective film mixture is put into an extruder, and a PVC protective film is obtained, wherein the temperature of the extruder is 160-180 DEG C, and the screw rotation speed interval of the extruder is 11-17 m / min.

[0025] Optionally, the PVC sheet with the PVC protective film comprises:

[0026] The protective film mixture is put into an extruder, and a PVC protective film is obtained, wherein the temperature of the extruder is 160-180 DEG C, and the screw rotation speed interval of the extruder is 11-17 m / min.

[0027] The protective film mixture is put into an extruder, and a PVC protective film is obtained, wherein the temperature of the extruder is 160-180 DEG C, and the screw rotation speed interval of the extruder is 11-17 m / min.

[0028] The protective film mixture is put into an extruder, and a PVC protective film is obtained, wherein the temperature of the extruder is 160-180 DEG C, and the screw rotation speed interval of the extruder is 11-17 m / min.

[0029] The protective film mixture is put into an extruder, and a PVC protective film is obtained, wherein the temperature of the extruder is 160-180 DEG C, and the screw rotation speed interval of the extruder is 11-17 m / min.

[0030] Optionally, the mixing time of the high-speed mixer is 1.5-2.5 h.

[0031] Optionally, the temperature of the extruder is 150-170 DEG C.

[0032] According to the above technical solution, the application provides a compressor protective cover, a refrigerator and a preparation method. The compressor protective cover comprises a protective cover base layer and a PVC protective film. The protective cover base layer is a PVC sheet. The protective cover base layer is prepared from the following raw materials in the following proportions: 80-90 parts of PVC resin, 2-5 parts of color masterbatch, 3-7 parts of reinforcing agent, 0.5-2 parts of toughening agent, 1-3 parts of stabilizer, 0.1-1 part of lubricant and 5-15 parts of filler. The PVC protective film is prepared from the following raw materials in the following proportions: 60-70 parts of PVC, 0.3-1 part of capsaicin, 3-8 parts of plasticizer, 0.5-3 parts of stabilizer, 0.2-3 parts of lubricant, 20-30 parts of filler and 3-5 parts of color masterbatch. The PVC protective film contains capsaicin. Capsaicin can stimulate the oral mucosa and taste nerves of rodents, preventing rodents from entering the compressor chamber and solving the problem of rodents entering the compressor chamber. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed in the embodiments. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0034] Figure 1 It is a schematic diagram of the compressor protective cover structure.

[0035] Figure 2 It is a schematic diagram of the compressor protective cover preparation method flow.

[0036] Illustration:

[0037] Among them, 100-protective cover base layer, 200-PVC protective film. DETAILED DESCRIPTION

[0038] The following will be described in detail, which is shown in the drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following embodiments do not represent all the embodiments consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application as described in detail in the claims.

[0039] In the process of analyzing the cause of the refrigerator fire, part of the fire cause is due to the damage of the PVC compressor protective cover. Due to cost constraints, the thickness of the PVC compressor protective cover is less than 1mm, and the strength is low, which is easy to be bitten by rodents. After rodents enter the compressor compartment, the wire harness is bitten, which causes short circuit and fire.

[0040] Referring to Figure 1 , some embodiments of the present application provide a compressor protective cover, comprising: a protective cover base layer 100 and a PVC protective film 200; wherein the protective cover base layer 100 is a PVC sheet, and the thickness of the protective cover base layer 100 is 0.6-1.5mm; the protective cover base layer 100 is prepared from the following raw materials by weight: 80-90 parts of PVC resin, 2-5 parts of color masterbatch, 3-7 parts of reinforcing agent, 0.5-2 parts of toughening agent, 1-3 parts of stabilizer, 0.1-1 parts of lubricant, 5-15 parts of filler; the PVC protective film 200 is prepared from the following raw materials by weight: 60-70 parts of PVC, 0.3-1 parts of capsaicin, 3-8 parts of plasticizer, 0.5-3 parts of stabilizer, 0.2-3 parts of lubricant, 20-30 parts of filler, 3-5 parts of color masterbatch. In some embodiments, the thickness of the PVC protective film 200 is 0.05-0.2mm.

[0041] The PVC resin of the present application includes 80-90 parts by weight, for example: 80, 85, 90 parts by weight of PVC resin; the color masterbatch of the present application includes 2-5 parts by weight, for example: 2, 3, 4, 5 parts by weight of color masterbatch; the reinforcing agent of the present application includes 3-7 parts by weight, for example: 3, 4, 5, 6, 7 parts by weight of reinforcing agent; the stabilizer of the present application includes 1-3 parts by weight, for example: 1, 2, 3 parts by weight of stabilizer; the lubricant of the present application includes 0.1-1 parts by weight, for example: 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 parts by weight of lubricant; the filler of the present application includes 5-15 parts by weight, for example: 5, 6, 7, 8, 9, 10, 11 parts by weight of filler.

[0042] The PVC of the present application includes 60-70 parts by weight, for example: 60, 65, 70 parts by weight of PVC; the capsaicin of the present application includes 0.3-1 parts by weight, for example: 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 parts by weight of capsaicin; the plasticizer of the present application includes 3-8 parts by weight, for example: 3, 4, 5, 6, 7, 8 parts by weight of plasticizer; the stabilizer of the present application includes 0.5-3 parts by weight, for example: 0.5, 1, 1.5, 2, 2.5, 3 parts by weight of stabilizer; the lubricant of the present application includes 0.2-3 parts by weight, for example: 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.5, 2, 2.5, 3 parts by weight of lubricant; the filler of the present application includes 20-30 parts by weight, for example: 20, 25, 30 parts by weight of filler; the color masterbatch of the present application includes 3-5 parts by weight, for example 3, 4, 5 parts by weight of color masterbatch.

[0043] The PVC protective film 200 contains capsaicin, which stimulates the oral mucosa and taste nerves of rodents, making rodents feel fear and escape, thereby solving the problem of rodents entering the compressor chamber; and the protective cover base layer 100 does not contain capsaicin, reducing the influence of capsaicin on operators during production.

[0044] Based on the above-mentioned compressor protective cover, some embodiments of the present application provide a refrigerator, which comprises a cabinet, a compressor and a compressor protective cover, the compressor is arranged in the cabinet, and the compressor protective cover is connected to the cabinet.

[0045] Referring to Figure 2 , based on the above-mentioned compressor protective cover, some embodiments of the present application also provide a method for preparing a compressor protective cover, which comprises:

[0046] S100: 60-70 parts of PVC, 0.3-1 part of capsaicin, 3-8 parts of plasticizer, 0.5-3 parts of stabilizer, 0.2-3 parts of lubricant, 20-30 parts of filler, 3-5 parts of color masterbatch are added to a high-speed mixer for mixing, and a PVC protective film 200 is obtained by an extrusion calendering method.

[0047] Capsaicin is irritating to mammals including humans and can produce a burning sensation in the mouth. The strong pungent taste of capsaicin can be used to strongly stimulate the oral mucosa and taste nerves of rodents to make them reject chewing, thereby reducing the gnawing of rodents.

[0048] In some embodiments, obtaining the PVC protective film 200 includes: adding 60-70 parts of PVC, 0.3-1 part of capsaicin, 3-8 parts of plasticizer, 0.5-3 parts of stabilizer, 0.2-3 parts of lubricant, 20-30 parts of filler, and 3-5 parts of color masterbatch into a high-speed mixer for mixing to obtain a protective film mixture; and placing the protective film mixture into an extruder to obtain the PVC protective film 200, wherein the temperature of the extruder is 160-180°C, and the screw rotation speed of the extruder is 11-17 m / min.

[0049] The extruder of the present embodiment is a single-screw extruder. The single-screw extruder forms the base layer mixture into a flow form through heating, mixing, and pressurizing the base layer mixture and then through a die.

[0050] In some embodiments, during the calendering process of the protective film mixture in the single-screw extruder, different temperatures and rotation speeds can be set. For example, the temperature of the first roller is controlled at 160°C and the rotation speed is 11 m / min, the temperature of the second roller is controlled at 160°C and the rotation speed is 14 m / min, the temperature of the third roller is controlled at 180°C and the rotation speed is 16 m / min, and the temperature of the fourth roller is controlled at 160°C and the rotation speed is 17 m / min.

[0051] It can be understood that a pattern, such as a brand logo or a warning word indicating that the compressor protective cover contains capsaicin and should not be directly touched, can be printed on the PVC protective film 200 to remind users.

[0052] S200: 80-90 parts of PVC resin, 2-5 parts of color masterbatch, 3-7 parts of reinforcing agent, 0.5-2 parts of toughening agent, 1-3 parts of stabilizer, 0.1-1 part of lubricant, and 5-15 parts of filler are added to a high-speed mixer for mixing, and a PVC sheet is obtained by a shaping roller to obtain a protective cover base layer 100.

[0053] The color masterbatch is a new type of coloring agent for special high polymer materials, which is used to provide color for the PVC sheet.

[0054] The reinforcing agent can be used as a reinforcing material to tightly combine the PVC resin with other materials and significantly improve the mechanical properties of the PVC sheet. In some embodiments, the DH-1 reinforcing agent can be used to tightly combine the resin and achieve good mechanical strength, and improve the dispersibility of the PVC resin, and the flowability of the PVC resin system.

[0055] The toughening agent can be a substance that increases the flexibility of the adhesive film layer. In some embodiments, the toughening agent can be ACR, MBS, ABS, etc. ACR is an acrylate copolymer with good light stability and heat resistance. Adding ACR to the PVC resin can improve its toughness and impact resistance, and also increase its low-temperature resistance. MBS is a styrene-butadiene-styrene terpolymer with excellent heat resistance and cold resistance. Adding MBS to the PVC resin can make the PVC sheet have higher flexibility and impact resistance. ABS is an acrylonitrile-butadiene-styrene copolymer with excellent strength and toughness. Adding ABS to the PVC resin can increase the strength and hardness of the PVC sheet, and also improve its impact resistance and heat resistance.

[0056] In some embodiments, the step of obtaining the PVC sheet includes: adding 80-90 parts of PVC resin, 2-5 parts of color masterbatch, 3-7 parts of reinforcing agent, 0.5-2 parts of toughening agent, 1-3 parts of stabilizer, 0.1-1 parts of lubricant, and 5-15 parts of filler into a high-speed mixer to mix, obtaining a PVC sheet mixture. In some embodiments, the mixing time of the high-speed mixer is 1.5-2.5 h.

[0057] The PVC sheet mixture is then placed into an extruder to obtain a hot PVC sheet using a shaping roller. In some embodiments, the temperature of the extruder is 150-170°C.

[0058] In some embodiments, 90 parts of PVC resin, 3 parts of color masterbatch, 4 parts of reinforcing agent, 1 part of toughening agent, 2 parts of stabilizer, 0.5 parts of lubricant, and 10 parts of filler are added into a high-speed mixer to mix, and the mixing time is set to 2 h to obtain a PVC sheet mixture. To reduce the influence of impurities on performance, the PVC sheet mixture can be filtered in some embodiments to remove impurities. The filter screen mesh size of the filter press can be selected to be 100 mesh.

[0059] The filtered mixture is then added to an extruder, in some embodiments, the PVC sheet mixture is extruded in a single screw extruder, during which the temperature is set, for example, the temperature of the first zone is set to 170°C, the temperature of the second zone is set to 165°C, the temperature of the third zone is set to 160°C, the temperature of the fourth zone is set to 165°C, and the temperature of the fifth zone is set to 150°C. After extrusion, the PVC sheet is cut and a calibrator is used to obtain a hot PVC sheet.

[0060] S300: The PVC sheet is combined with the PVC protective film 200 by online hot lamination to obtain a PVC sheet with a PVC protective film.

[0061] In some embodiments, obtaining a PVC sheet with a PVC protective film comprises:

[0062] 80-90 parts of PVC resin, 2-5 parts of color masterbatch, 3-7 parts of reinforcing agent, 0.5-2 parts of toughening agent, 1-3 parts of stabilizer, 0.1-1 parts of lubricant, and 5-15 parts of filler are added to a high-speed mixer to obtain a PVC sheet mixture;

[0063] The PVC sheet mixture is placed in an extruder, and a calibrator is used to obtain a hot PVC sheet. How to obtain a hot PVC sheet has been described above;

[0064] Online hot lamination is performed while the hot PVC sheet is being extruded to obtain a laminated PVC sheet;

[0065] The laminated PVC sheet is cooled to obtain a PVC sheet with a PVC protective film.

[0066] S400: The laminated PVC sheet with a PVC protective film is vacuum formed to obtain a compressor protective cover.

[0067] In some embodiments, vacuum forming the laminated PVC sheet with a PVC protective film to obtain a compressor protective cover comprises: heating the laminated PVC sheet with a PVC protective film to a softened state; placing the softened laminated PVC sheet with a PVC protective film in a vacuum forming mold; vacuumizing the mold cavity of the vacuum forming mold to make the softened laminated PVC sheet with a PVC protective film adhere to the surface of the vacuum forming mold to obtain a PVC sheet with a shape; cooling the PVC sheet with a shape to obtain a compressor protective cover.

[0068] After the PVC sheet with shape prepared by the above-mentioned materials is obtained, the PVC sheet with shape is cut according to the size required by the compressor protective cover, the thickness can be selected as 0.6-1.5 mm, the laminated PVC sheet with the PVC protective film is positioned, the laminated PVC sheet with the PVC protective film can be heated by using an oven until the laminated PVC sheet with the PVC protective film reaches a softened state, a vacuum forming mold forms a closed space with the periphery thereof, and then the laminated PVC sheet with the PVC protective film is placed in the closed space, air in the mold cavity is sucked away instantaneously, and the laminated PVC sheet with the PVC protective film can be attached to the surface of the mold, wherein the vacuum forming mold is a mold with a shape required by the compressor protective cover, and the compressor protective cover can be obtained after the PVC sheet with shape is cooled.

[0069] It can be understood that different vacuum forming molds can be selected according to different required shapes.

[0070] In the process of generating the compressor protective cover and the PVC sheet with the PVC protective film, the PVC sheet with shape and the laminated PVC sheet need to be cooled and shaped, and impurities may be covered on the PVC sheet with shape and the laminated PVC sheet during the cooling process. In order to increase the efficiency of the laminating process, the PVC sheet with shape and the laminated PVC sheet need to be treated to remove the impurities. In some embodiments, ethanol and / or dichloromethane are used to clean the surface of the PVC sheet with shape and the laminated PVC sheet.

[0071] In the following experiments, different capsaicin contents and different extruder temperatures and screw rotation speeds are used. In order to reduce the influence of other materials and temperatures on the results, the influence of different temperatures and rotation speeds of the protective film mixture in the calendering process of the single-screw extruder on the rat-proof rate is not considered in Examples 1-4 and Comparative Examples 1-2, and the plasticizer, stabilizer, lubricant, filler and color masterbatch.

[0072] Example 1, the preparation method of the PVC protective film 200 is as follows:

[0073] After the raw materials are weighed and mixed according to the weight parts, the raw materials are uniformly stirred and mixed, and the raw material ratio is as follows: 60 parts of PVC, 0.3 parts of capsaicin, 5 parts of plasticizer, 2 parts of stabilizer, 2 parts of lubricant, 25 parts of filler, and 3 parts of color masterbatch, to obtain a protective film mixture; the protective film mixture is placed in an extruder, the temperature of the extruder is 160°C, the screw rotation speed of the extruder is 12 m / min, and the PVC protective film 200 is obtained after cooling and edge cutting.

[0074] Example 2, the preparation method of the PVC protective film 200 is as follows:

[0075] After each raw material is weighed and proportioned by weight parts, it is mixed and stirred uniformly. The proportions of each raw material are as follows: 60 parts of PVC, 0.6 parts of capsaicin, 5 parts of plasticizer, 2 parts of stabilizer, 2 parts of lubricant, 25 parts of filler, and 3 parts of color masterbatch to obtain a protective film mixture; the protective film mixture is placed into an extruder, the temperature of the extruder is 170°C, the screw speed of the extruder is 14 m / min, it is cooled, edged, and a PVC protective film 200 is obtained.

[0076] Example 3, the preparation method of the PVC protective film 200 is as follows:

[0077] After each raw material is weighed and proportioned by weight parts, it is mixed and stirred uniformly. The proportions of each raw material are as follows: 60 parts of PVC, 0.6 parts of capsaicin, 5 parts of plasticizer, 2 parts of stabilizer, 2 parts of lubricant, 25 parts of filler, and 3 parts of color masterbatch to obtain a protective film mixture; the protective film mixture is placed into an extruder, the temperature of the extruder is 170°C, the screw speed of the extruder is 14 m / min, it is cooled, edged, and a PVC protective film 200 is obtained.

[0078] Example 4, the preparation method of the PVC protective film 200 is as follows:

[0079] After each raw material is weighed and proportioned by weight parts, it is mixed and stirred uniformly. The proportions of each raw material are as follows: 60 parts of PVC, 0.6 parts of capsaicin, 5 parts of plasticizer, 2 parts of stabilizer, 2 parts of lubricant, 25 parts of filler, and 3 parts of color masterbatch to obtain a protective film mixture; the protective film mixture is placed into an extruder, the temperature of the extruder is 170°C, the screw speed of the extruder is 14 m / min, it is cooled, edged, and a PVC protective film 200 is obtained.

[0080] Comparative Example 1, the preparation method of the PVC protective film 200 is as follows:

[0081] After each raw material is weighed and proportioned by weight parts, it is mixed and stirred uniformly. The proportions of each raw material are as follows: 60 parts of PVC, 0.6 parts of capsaicin, 5 parts of plasticizer, 2 parts of stabilizer, 2 parts of lubricant, 25 parts of filler, and 3 parts of color masterbatch to obtain a protective film mixture; the protective film mixture is placed into an extruder, the temperature of the extruder is 170°C, the screw speed of the extruder is 14 m / min, it is cooled, edged, and a PVC protective film 200 is obtained.

[0082] Comparative Example 2, the preparation method of the PVC protective film 200 is as follows:

[0083] After the raw materials are weighed and proportioned by weight parts, they are mixed and stirred uniformly. The proportions of the raw materials are as follows: 60 parts of PVC, 0.3 parts of capsaicin, 5 parts of plasticizer, 2 parts of stabilizer, 2 parts of lubricant, 25 parts of filler, and 3 parts of color master, to obtain a protective film mixture; the protective film mixture is placed in an extruder, the temperature of the extruder is 180°C, the screw speed of the extruder is 17 m / min, and the edges are cooled and cut to obtain a PVC protective film 200.

[0084] The PVC protective film 200 of Examples 1-4 and Comparative Examples 1-2 is combined with the PVC sheet by online hot lamination to obtain a PVC sheet with a PVC protective film, and the PVC sheet with a PVC protective film is formed into a compressor protective cover by suction molding.

[0085] Table 1: Compressor protective cover performance test results

[0086] Test Rodent protection rate (%) Example 1 75 Example 2 79 Example 3 82 Example 4 85 Comparative Example 1 5 Comparative Example 2 60

[0087] According to Table 1, the compressor protective cover prepared from the PVC protective film 200 has the best rat prevention rate when the weight part of capsaicin is 1. In Comparative Example 1, no capsaicin is contained, so the rat prevention rate is the worst. Regarding Examples 1-3, the rat prevention effect is different according to the weight part of capsaicin.

[0088] According to the above technical solution, the application provides a compressor protective cover, a refrigerator, and a preparation method. The compressor protective cover comprises: a protective cover base layer 100 and a PVC protective film 200; wherein the protective cover base layer 100 is a PVC sheet; the protective cover base layer 100 is prepared from the following raw materials by weight parts: 80-90 parts of PVC resin, 2-5 parts of color master, 3-7 parts of reinforcing agent, 0.5-2 parts of toughening agent, 1-3 parts of stabilizer, 0.1-1 parts of lubricant, and 5-15 parts of filler; the PVC protective film 200 is prepared from the following raw materials by weight parts: 60-70 parts of PVC, 0.3-1 parts of capsaicin, 3-8 parts of plasticizer, 0.5-3 parts of stabilizer, 0.2-3 parts of lubricant, 20-30 parts of filler, and 3-5 parts of color master. The PVC protective film 200 contains capsaicin, which can stimulate the oral mucosa and taste nerves of rodents, preventing rodents from entering, thereby solving the problem of rodents entering the compressor compartment.

[0089] The similar parts among the embodiments provided in the application can be referred to each other, the specific embodiments provided above are only several examples under the general concept of the application, and do not constitute the limitation of the protection scope of the application. Any other embodiments extended according to the application scheme without creative labor for those skilled in the art shall fall within the protection scope of the application.

Claims

1. A compressor guard cover characterized by, Comprising: a protective cover base layer (100) and a PVC protective film (200); wherein the protective cover base layer (100) is a PVC sheet; the protective cover base layer (100) is prepared from the following raw materials by weight: 80-90 parts of PVC resin, 2-5 parts of color masterbatch, 3-7 parts of reinforcing agent, 0.5-2 parts of toughening agent, 1-3 parts of stabilizer, 0.1-1 parts of lubricant, 5-15 parts of filler; the PVC protective film (200) is prepared from the following raw materials by weight: 60-70 parts of PVC, 0.3-1 parts of capsaicin, 3-8 parts of plasticizer, 0.5-3 parts of stabilizer, 0.2-3 parts of lubricant, 20-30 parts of filler, 3-5 parts of color masterbatch; the preparation process of the compressor protective cover is: 60-70 parts of PVC, 0.3-1 parts of capsaicin, 3-8 parts of plasticizer, 0.5-3 parts of stabilizer, 0.2-3 parts of lubricant, 20-30 parts of filler, 3-5 parts of color masterbatch are added into a high-speed mixer for mixing, and a PVC protective film (200) is obtained by extrusion calendering method; 80-90 parts of PVC resin, 2-5 parts of color masterbatch, 3-7 parts of reinforcing agent, 0.5-2 parts of toughening agent, 1-3 parts of stabilizer, 0.1-1 parts of lubricant, 5-15 parts of filler are added into a high-speed mixer for mixing, and a PVC sheet is obtained by a setting roller, wherein the PVC sheet is a protective cover base layer (100); the PVC sheet with the PVC protective film (200) is combined by online hot lamination to obtain a PVC sheet with a PVC protective film; the laminated PVC sheet with the PVC protective film is formed by suction molding to obtain a compressor protective cover; the obtained PVC protective film (200) comprises: 60-70 parts of PVC, 0.3-1 parts of capsaicin, 3-8 parts of plasticizer, 0.5-3 parts of stabilizer, 0.2-3 parts of lubricant, 20-30 parts of filler, and 3-5 parts of color masterbatch are added into a high-speed mixer for mixing to obtain a protective film mixture; the protective film mixture is placed into an extruder to obtain a PVC protective film (200), wherein the temperature of the extruder is 160-180°C, and the screw rotation speed of the extruder is 11-17 m / min.

2. The compressor guard cover of claim 1, wherein, The thickness of the PVC protective film (200) is 0.05-0.2 mm; the thickness of the protective cover base layer (100) is 0.6-1.5 mm.

3. A refrigerator characterized by comprising: Comprising a box body, a compressor and the compressor protective cover of any one of claims 1-2, wherein the compressor is arranged in the box body, and the compressor protective cover is connected to the box body.

4. A method for preparing a compressor protective cover, characterized in that, For preparing the compressor protective cover of any one of claims 1-2, comprising: 60-70 parts of PVC, 0.3-1 parts of capsaicin, 3-8 parts of plasticizer, 0.5-3 parts of stabilizer, 0.2-3 parts of lubricant, 20-30 parts of filler, and 3-5 parts of color masterbatch are added into a high-speed mixer for mixing to obtain a PVC protective film (200); 80-90 parts of PVC resin, 2-5 parts of color masterbatch, 3-7 parts of reinforcing agent, 0.5-2 parts of toughening agent, 1-3 parts of stabilizer, 0.1-1 parts of lubricant, and 5-15 parts of filler are added into a high-speed mixer for mixing, and a PVC sheet is obtained by using a shaping roller, wherein the PVC sheet is a protective cover base layer (100); The PVC sheet is combined with the PVC protective film (200) by online hot lamination to obtain a PVC sheet with a PVC protective film; The laminated PVC sheet with a PVC protective film is formed by vacuum molding to obtain a compressor protective cover; the PVC protective film (200) comprises: 60-70 parts of PVC, 0.3-1 parts of capsaicin, 3-8 parts of plasticizer, 0.5-3 parts of stabilizer, 0.2-3 parts of lubricant, 20-30 parts of filler, and 3-5 parts of color masterbatch are added into a high-speed mixer for mixing to obtain a protective film mixture; The protective film mixture is placed into an extruder to obtain a PVC protective film (200), wherein the temperature of the extruder is 160-180°C, and the screw rotation speed of the extruder is 11-17 m / min.

5. The method of claim 4, wherein the step of forming the protective cover comprises the step of: The laminated PVC sheet with a PVC protective film is formed by vacuum molding to obtain a compressor protective cover, comprising: ​ The laminated PVC sheet with a PVC protective film is heated to a softened state; The laminated PVC sheet with a PVC protective film in the softened state is placed in a vacuum molding mold; The mold cavity of the vacuum molding mold is vacuumized to make the laminated PVC sheet with a PVC protective film in the softened state adhere to the surface of the vacuum molding mold to obtain a PVC sheet with a shape; The PVC sheet with a shape is cooled to obtain a compressor protective cover.

6. The method of claim 4, wherein the step of forming the protective cover comprises the step of: The laminated PVC sheet with a PVC protective film comprises: ​ 80-90 parts of PVC resin, 2-5 parts of color masterbatch, 3-7 parts of reinforcing agent, 0.5-2 parts of toughening agent, 1-3 parts of stabilizer, 0.1-1 parts of lubricant, and 5-15 parts of filler are added into a high-speed mixer for mixing to obtain a PVC sheet mixture; The PVC sheet mixture is placed into an extruder to obtain a hot PVC sheet by using a shaping roller; Online hot lamination is performed while the hot PVC sheet is being extruded to obtain a laminated PVC sheet; The laminated PVC sheet is cooled to obtain a PVC sheet with a PVC protective film.

7. The method of claim 6, wherein the step of forming the protective cover comprises the step of: The mixing time of the high-speed mixer is 1.5-2.5 h. ​ 8. The method of claim 6, wherein the step of forming the protective cover comprises the step of: The temperature of the extruder is 150-170°C. ​

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