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Polyurethane foaming system used for refrigerator and refrigerator based on same

A technology of polyurethane and rigid polyurethane, which is applied in the field of low-temperature storage equipment, can solve the problems of poor thermal insulation performance of foaming agents, high energy consumption of refrigerators, and improved thermal insulation performance, and achieve the goal of improving thermal insulation performance, strong mechanical properties, and improving compressive strength Effect

Inactive Publication Date: 2017-05-31
CHANGHONG MEILING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The foaming agent has poor thermal insulation performance, resulting in high energy consumption of the refrigerator, which cannot meet the increasing requirements for thermal insulation performance. Therefore, it is imperative to develop a more energy-saving and environmentally friendly refrigerator foaming system.

Method used

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  • Polyurethane foaming system used for refrigerator and refrigerator based on same
  • Polyurethane foaming system used for refrigerator and refrigerator based on same
  • Polyurethane foaming system used for refrigerator and refrigerator based on same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The composition of each raw material of the polyurethane foaming system in this embodiment by mass is as follows:

[0028]

[0029]

[0030] Using the polyurethane foaming system of this embodiment, the steps for manufacturing the thermal insulation rigid polyurethane foam in the refrigerator box are as follows:

[0031] 1) Mix the combined polyether, physical blowing agent HFC-245fa and physical blowing agent HFO-1233zd(E) at the material temperature of 20°C according to the ratio to obtain a mixed white material;

[0032] 2) Put the isocyanate into the premix tank and stir evenly under the condition of the material temperature of 20°C to obtain the black material;

[0033] 3) Under the condition of the material temperature of 20℃, the black material and the mixed white material are mixed by the high-pressure foaming machine according to the ratio, and then quickly injected into the refrigerator box to be foamed;

[0034] 4) The temperature of the refrigerator box mold to be foa...

Embodiment 2

[0037] The composition of each raw material of the polyurethane foaming system in this embodiment by mass is as follows:

[0038]

[0039] Using the polyurethane foaming system of this embodiment, the method of manufacturing the heat-insulating rigid polyurethane foam in the refrigerator box is the same as that of the first embodiment.

[0040] After the foamed box was cooled to room temperature, the rigid polyurethane foam in the box was taken out and its related properties were tested. The results are shown in Table 1.

Embodiment 3

[0042] The composition of each raw material of the polyurethane foaming system in this embodiment by mass is as follows:

[0043]

[0044] Using the polyurethane foaming system of this embodiment, the method for manufacturing the heat-insulating rigid polyurethane foam in the refrigerator box is the same as that of the first embodiment.

[0045] After the foamed box was cooled to room temperature, the rigid polyurethane foam in the box was taken out, and its related properties were tested. The results are shown in Table 1.

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Abstract

The invention discloses a polyurethane foaming system used for a refrigerator and the refrigerator based on the polyurethane foaming system. The foaming raw materials are formed by compounding premixed polyether polyol, a physical foaming agent HFC-245fa, a physical foaming agent HFO-1233zd(E) and isocyanate at a certain mass fraction ratio. The polyurethane foaming system disclosed by the invention is relatively high in thermal insulation property and relatively high in mechanical property, and is non-combustible or non-explosive; and rigid polyurethane foam prepared from a foaming liquid of the system is relatively low in heat conductivity coefficient and relatively high in mechanical property, so that the thermal insulation property and the structural stability of the refrigerator are improved.

Description

Technical field [0001] The invention belongs to the field of low-temperature storage equipment, and specifically is a household / commercial refrigerator with good heat preservation performance using a novel foaming system. Background technique [0002] With the advancement of science and technology, refrigerators, as a kind of low-temperature storage equipment, are in increasing demand, whether they are used in household daily life, scientific research or medical fields, and the requirements for energy conservation and environmental protection are becoming more and more stringent. [0003] At present, most refrigerators are made with traditional polyurethane foaming system, which uses cyclopentane as the main physical foaming agent. The foaming agent has poor thermal insulation performance, which leads to high energy consumption of refrigerators, which can no longer meet the increasing requirements for thermal insulation performance. Therefore, it is imperative to develop a more ene...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/50C08J9/14C08G101/00
CPCC08G18/4804C08G18/5024C08J9/144C08J9/146C08J2203/142C08J2375/08C08G2110/0025
Inventor 刘鹏江峰吴园
Owner CHANGHONG MEILING CO LTD