Foaming equipment, foaming process and foaming process of refrigeration equipment

Abstract

The invention discloses foaming equipment, a foaming technology and a foaming technology of a refrigeration plant. The foaming equipment is used for foaming a pre-assembling component; a foaming space is limited in the pre-assembling component; the foaming equipment comprises a foaming mould, a first air exhaust mechanism, a second air exhaust mechanism and a first negative pressure providing device. The foaming mould comprises a first mould body and a second mould body; the first mould body and the second mould body are matched to limit a mould cavity; the first air exhaust mechanism is communicated with the mould cavity; the second air exhaust mechanism comprises an air guide pipe fixedly arranged in the foaming space; the air guide pipe comprises an opening pipe and a clamping strip, an opening extending in the axial direction of the opening pipe is formed in the pipe wall of the opening pipe, and the clamping strip can be arranged on the opening pipe in a sliding mode to seal the opening. The first negative pressure providing device is connected with the first air exhaust mechanism and used for forming negative pressure in the foaming space. According to the foaming equipment, air negative pressure can be evenly transmitted to the foaming space, and therefore the heat preservation performance of a heat preservation layer obtained after foaming is better, foaming raw materials can be saved, and the cost is reduced.

Description

[0001] This application is a divisional application of Chinese patent application 201110007835.6, the title of the invention is "Foaming Equipment, Foaming Process, and Foaming Process for Refrigeration Equipment", and the applicants are "Midea Hefei Refrigerator Co., Ltd., Hefei Hualing Co., Ltd." technical field [0002] The invention relates to the field of refrigeration equipment manufacturing, in particular to a foaming equipment, a foaming process using the foaming equipment and a foaming process of the refrigeration equipment. Background technique [0003] The refrigeration equipment currently on the market is mainly composed of a refrigeration system and an insulated box. The insulated box is generally made by the following process: [0004] Assemble the shell and liner of the refrigeration equipment into a relatively closed shell, and set a filling port for foaming material on one end of the shell, and store the box in a high temperature environment for a period of t...

AI Technical Summary

Problems solved by technology

[0006] 1. Part of the air that is not discharged in time during the foaming process will penetrate into the foaming material and form large pores, resulting in the formation of local thermal insulation weak points in the box, and the overall thermal conductivity is high;

[0007] 2. The rapid expansion of the foaming material inside the box and the high pressure inside the box caused by poor exhaust prolong the time period for the foaming material to fill the entire box, limiting the production capacity;

[0008] 3. Due to the longer filling cycle and the increase in hardness of the foaming material during the foaming process, while the fluidity and plasticity decrease and other factors, the density of the foaming material near the filling port is higher, and it is far away from the filling port. The density of the foam material is low, which makes the thermal conductivity of the whole box uneven and the individual differences of batch products are large

[0009] 4. In the actual production of refrigeration equipment, due to the above shortcomings, it is often necessary to fill more foaming materials to achieve the corresponding thermal insulation performance, resulting in higher costs, as well as many problems such as environmental protection and energy involved.

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