CN201149408Y - Modular Shelving for Refrigerated Display Cases - Google Patents

Abstract

The combined shelf used for the refrigerated display cabinet belongs to refrigeration equipment. The shelf plate of the shelf is provided with a closed cavity, and a heat pipe is arranged in the cavity and filled with a phase change material. The isothermal characteristics of the heat pipe can be used to improve the temperature field distribution of the food placed in different positions in the display cabinet, and the temperature rise of the food in the cabinet when the evaporator in the refrigeration system defrosts can be reduced by using the cold storage performance of the phase change material. The above scheme basically solves the key problems of uneven temperature field distribution in the refrigerated showcase and temperature rise during defrosting, maintains the original quality of the food for a long time, and can extend the shelf life of the food by 1 to 2 days.

Description

Modular Shelving for Refrigerated Display Cases

technical field

The utility model relates to refrigeration equipment, in particular to a combined shelf for a refrigerated display cabinet.

Background technique

The existing refrigerated display cabinet is limited by its own structure and refrigeration method. Although it can achieve the effect of overall refrigeration, the temperature field in the cabinet is not evenly distributed. There is a large difference, and the temperature of food placed in different positions on the same shelf is also different. When the evaporator in the refrigeration system defrosts, the temperature of the food in the cabinet will rise greatly due to the open front, which seriously affects the quality and shelf life of the refrigerated food.

Contents of the invention

The purpose of this utility model is to provide a shelf for refrigerated display cabinets that can reduce the temperature difference of food in the cabinet. It can still suppress the temperature rise, maintain the quality of the refrigerated food in the cabinet and extend the shelf life.

In order to achieve the above purpose, the technical solution adopted by the utility model is: the combined shelf for the refrigerator includes a shelf plate, the shelf plate is composed of two layers of plates, and an airtight shelf is arranged between the two layers of plates. The cavity is provided with at least one heat pipe on the shelf, the evaporation section of the heat pipe is located inside the cavity of the shelf, and the condensation section of the heat pipe is located outside the cavity of the shelf.

A phase change material with cold storage performance is filled around the heat pipe in the shelf cavity.

The tube body of the heat pipe located in the inner cavity of the shelf is parallel to the side of the shelf, its length is equal to the width of the shelf, and is fixed on the shelf in a uniform state.

Since the airtight cavity is arranged on the shelf plate of the shelf, heat pipes are evenly arranged along the length of the shelf in the cavity, and the isothermal characteristic of the heat pipe is used to improve the temperature field distribution of the food placed in different positions in the display cabinet. And because the phase change material is filled in the cavity of the shelf, the temperature rise of the food in the cabinet when the evaporator in the refrigeration system defrosts is reduced by using its cold storage performance. The above scheme basically solves the key problems of uneven temperature field distribution and temperature rise during defrosting of the refrigerated showcase, maintains the original quality of the food for a long time, and can extend the shelf life of the food by 1 to 2 days.

Description of drawings

Fig. 1 is the front view of this combined shelf;

Fig. 2 is a schematic diagram of the internal structure of the rack after being cut open in Fig. 1 .

Detailed ways

The combined shelf for the refrigerated display cabinet includes a shelf plate 2, the shelf plate 2 is composed of two layers of plates, and an airtight cavity is arranged between the two layers of plates. In this embodiment, the shelf plate The upper surface of 2 is made of a copper plate with a thickness of 1mm, the lower surface is an aluminum plate, and polystyrene insulation material is pasted on the bottom. In addition, the shelf plate 2 can also adopt other metal materials with good heat transfer performance. At least one heat pipe 1 is installed on the shelf plate 2, and the density of the heat pipe 1 can be determined according to the length of the shelf and the required refrigeration temperature. In this embodiment, the distance between the two heat pipes is set to 400mm. The tube body of the evaporating section of the heat pipe 1 is located inside the cavity of the shelf 2; the tube body of the condensation section of the heat pipe 1 with cooling fins 4 is located outside the cavity of the shelf 2. When combined with the refrigerated showcase, It is located in the cold air channel above the evaporator of the showcase to facilitate heat dissipation. The tube body of the heat pipe 1 located in the inner cavity of the shelf is parallel to the side of the shelf 2 , its length is equal to the width of the shelf 2 , and is fixed on the shelf 2 in an evenly distributed state. In addition, other tube arrangement methods can also be adopted as required. The heat pipe 1 is fixed on the upper surface copper plate of the shelf by welding. A phase change material 3 with cold storage performance is filled around the heat pipe 1 in the airtight cavity of the frame plate. In this embodiment, the phase change material 3 uses deionized water and the nucleating additive borax. The phase change material mixture composed of this component can reduce the supercooling of water and promote nucleation, and is a cheap corrosion inhibitor It has strong chlorine resistance and can reduce the corrosion effect of phase change materials on the copper plates and heat pipes in the shelf. In addition, other phase change materials with cold storage performance and low corrosion can also be used. When filling the phase change material, the liquid filling hole and the air release hole can be drilled on the processed shelf, and a one-way valve can be installed for filling. After the filling is completed, the two holes can be closed. When in use, directly place the shelf on the supporting frame of the corresponding refrigerated display cabinet.

Its working principle is: if the set working temperature of the shelf is 0°C, when the temperature of the evaporation end of the heat pipe at the front of the shelf reaches the vaporization point of the working fluid, the working medium in the tube will vaporize, absorb the heat of vaporization from the heat source, and the vaporized steam will It flows to the condensation section at the back of the shelf and condenses when it encounters condensation, and releases latent heat to the heat dissipation area through the heat dissipation fins. The condensate produced after heat dissipation is returned to the evaporation end by the capillary force and gravity of the inner wall material of the heat pipe, and continues to be heated and vaporized. This reciprocating cycle transfers a large amount of heat from the heating zone to the cooling zone. Through the temperature adjustment function of the heat pipes on each shelf, the temperature distribution in the up, down, left, right, front and back in the refrigerated display cabinet tends to be uniform, so that the temperature difference of the food placed in different positions of the refrigerated display cabinet also tends to be uniform. The phase change material filled in the shelf has unique latent heat performance, that is, during the phase change process, the phase change between liquid and solid occurs when the heat pipe is in normal operation, releasing latent heat. When the evaporator in the refrigeration system defrosts, the heat pipe stops running, the temperature rises, and the phase change material melts. By absorbing the latent heat of phase change during melting, the temperature of the shelf is reduced, thereby enhancing the heat transfer of food and reducing the temperature rise of defrosting. The combined shelf strengthens the heat transfer between the shelf and food through the joint action of the heat pipe and the phase change material, and improves the uniformity of the temperature field distribution in the refrigerated display cabinet. It further reduces the temperature of refrigerated food and the product temperature rise during defrosting, better maintains the original quality of food, and prolongs the shelf life.

Claims (3)

1. A combined shelf for a refrigerated display cabinet, including a shelf plate, characterized in that: the shelf plate is composed of two layers of plates, and an airtight cavity is arranged between the two layers of plates. At least one heat pipe is arranged on the board, the tube body of the evaporating section of the heat pipe is located inside the cavity of the shelf plate, and the tube body of the condensation section of the heat pipe is located outside the cavity of the shelf plate. 2. The combined shelf for a refrigerated showcase according to claim 1, characterized in that: phase change materials with cold storage properties are filled around the heat pipes in the cavity of the shelf. 3. The combined shelf for refrigerated display cabinets according to claim 2, characterized in that: the pipe body of the heat pipe located in the inner cavity of the shelf is parallel to the side of the shelf, and its length is equal to the width of the shelf equal, and fixed on the shelf in a uniform state.

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