CN201600077U - Heat exchange surface of flake ice machine evaporator with micro-channels to enhance heat transfer - Google Patents

Abstract

The utility model discloses a flake ice machine evaporator heat exchange surface, which comprises a refrigerant side heat exchange surface and an ice making side heat exchange surface. Besides, a microscale channel is arranged on the refrigerant side heat exchange surface of an evaporator. As the microscale channel is arranged on the refrigerant side heat exchange surface, the area of the refrigerant side heat exchange surface is increased. Simultaneously, the flake ice machine evaporator heat exchange surface increases the number of boiling nucleuses and perturbation to fluid when refrigerants evaporate, reinforces refrigerant side boiling heat exchange, and remarkably increases refrigerant side heat transfer coefficient. The structure further improves the capability of liquid soaking wall surfaces and capillary capacity, enables the refrigerants to effectively soak the surface of the refrigerant side of the evaporator, effectively improves the use ratio of the evaporator heat exchange surface, and also enlarges the size of a refrigerant side channel. By using the structure on the flake ice machine evaporator, the structure is capable of remarkably strengthening the heat transfer capacity of the evaporator and increasing the heat exchange quantity of unit area, thereby achieving the effects of decreasing the area of the evaporator and miniaturizing an ice maker.

Description

Heat exchange surface of flake ice machine evaporator with micro-channels to enhance heat transfer

technical field

The utility model relates to a heat exchanger for an ice maker, in particular to an evaporator for a flake ice machine, and belongs to the field of heat exchangers.

Background technique

The evaporator of the flake ice machine is an important heat transfer part of the flake ice machine, and its heat transfer performance determines the performance and overall structure size of the flake ice machine.

The evaporator of the flake ice machine currently in use is made of ordinary flat steel. The heat transfer performance of the refrigerant side is worse than that of the water side. Enhancing the heat transfer capacity of the refrigerant side can significantly improve the heat transfer performance of the evaporator. . The key to enhancing the heat transfer on the refrigerant side, that is, to enhance the boiling heat transfer, is that it is easier to form a vaporization core on the heating surface.

Numerous studies on enhanced boiling heat transfer revolve around the formation of various structures on the heating surface of pipes: such as Chinese patent ZL95246323.7 (authorized announcement number CN2257376Y).

Utility model content

The purpose of this utility model is to provide a method that enhances the ability of forming the vaporization core on the heat exchange surface of the refrigerant side of the evaporator of the flake ice machine, increases the capillary lifting capacity of the refrigerant, and enhances the ability of the refrigerant to infiltrate the heat exchange surface. Enhanced heat transfer surface with large refrigerant side heat transfer surface area.

In order to achieve the above object, the utility model adopts the following technical solutions:

A heat exchange surface of an evaporator for a flake ice machine, including an evaporator shell, a heat exchange surface on the refrigerant side of the evaporator shell, a V-shaped micro-scale channel processed on the heat exchange surface on the refrigerant side, and a heat exchange surface on the water side .

The V-shaped micro-scale channels are processed on the heat exchange surface on the side of the refrigerant in a mesh shape.

The width of the upper part of the V-shaped micro-scale channel is 0.01-2mm, and the groove depth is 0.1-3mm.

The pitch of the V-shaped micro-scale channels is 2-50 mm.

After adopting the above scheme, the utility model adopts the processing of micro-channels on the heat exchange surface of the original refrigerant side, which has a simple structure and can well enhance the ability of the refrigerant side to form a vaporization core, enhance the capillary lifting capacity of the refrigerant, and enhance The ability of the refrigerant to infiltrate the heat transfer surface, while also increasing the heat transfer surface area on the refrigerant side.

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

Description of drawings

Fig. 1 is the utility model schematic diagram.

Fig. 2 is a view along the direction A of Fig. 1 .

Description of figure number:

1 Evaporator shell 2 Refrigerant side heat exchange surface 3V micro-scale channel 4 Water side heat exchange surface

Detailed ways

A heat exchange surface of an evaporator, as shown in Figure 1, on the basis of the ordinary plane of its heat exchange surface (2) on the refrigerant side, a V-shaped groove (3) is processed, which increases the amount of vaporization formed on the refrigerant side. The core capability is to increase the capillary lifting capacity of the refrigerant, increase the ability of the refrigerant to infiltrate the heat transfer surface, and at the same time increase the heat transfer surface area on the refrigerant side.

The specific method is: machining V-shaped micro channels (3) on the surface of ordinary flat steel materials, and the micro-scale channels (3) are processed on the heat exchange surface (2) on the side of the refrigerant in a mesh shape.

The upper groove width of the V-shaped micro-scale channel (3) is 0.01-2 mm, and the groove depth is 0.1-3 mm.

The pitch of the V-shaped micro-scale channels (3) is 2-50mm.

This design increases the ability of the refrigerant side to form a vaporization core, increases the capillary lifting capacity of the refrigerant, increases the ability of the refrigerant to infiltrate the heat exchange surface, and also increases the heat exchange surface area on the refrigerant side.

The above embodiments are only for illustrating the utility model, rather than limiting the utility model. Those skilled in the art can also make various transformations or changes without departing from the spirit and scope of the utility model. For example, the size and spacing of the microgrooves are different. Therefore, all equivalent technical solutions should also belong to the category of the present utility model, and should be defined by each claim.

Claims (4)

1. evaporator of flake ice maker heat-transfer surface, comprise evaporator shell (1), evaporator refrigerant side heat-transfer surface (2) and V-type minute yardstick conduit (3), the water side heat-transfer surface (4) upward processed at refrigerant side heat-transfer surface (2), it is characterized in that: be processed with V-type minute yardstick conduit (3) on the refrigerant side heat exchange surface (2).

2. evaporator of flake ice maker heat-transfer surface according to claim 1 is characterized in that: described V-type minute yardstick conduit (3) with netted form processing on refrigerant side heat-transfer surface (2).

3. evaporator of flake ice maker heat-transfer surface as claimed in claim 1 or 2, it is characterized in that: described V-type minute yardstick conduit (3) top groove width is 0.01～2mm, and groove depth is 0.1～3mm.

4. evaporator of flake ice maker heat-transfer surface as claimed in claim 1 or 2, it is characterized in that: described V-type minute yardstick conduit (3) separation is 2～50mm.

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