Plate tube type refrigeration evaporator

Abstract

The application discloses a plate-tube type freezing evaporator in the technical field of refrigeration equipment, which comprises an evaporation plate and an evaporation pipe, the evaporation pipe is fixed on the evaporation plate, both ports of the evaporation pipe are located on the same side of the evaporation plate, a plurality of punching ports are arranged on the evaporation plate, the punching ports are oppositely arranged in pairs, a first folding edge is arranged at the opposite end of the opposite punching ports, the evaporation pipe is arranged on the inner side region opposite to the first folding edge, and the evaporation pipe can be arranged in a single-pipe independent fixing mode or a double-pipe parallel fixing mode in the inner side region, a second folding edge and a third folding edge are sequentially connected to the two sides of the evaporation plate, notches are arranged at the upper and lower ends of the second folding edge, and the two ports of the evaporation pipe penetrate the notches.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, specifically to a plate-tube type freeze evaporator. Background Technology

[0002] In the field of refrigeration equipment technology, the evaporator tube fixing structure and air convection design of plate-tube refrigeration evaporators directly affect refrigeration efficiency and equipment reliability. In existing technologies, evaporator tubes are mostly fixed using clamps or simple folded edges for limiting their position, and the convection holes in the evaporator plates are mostly uniformly distributed, which has significant shortcomings in practical applications.

[0003] For example, patent CN2809527Y discloses a plate-tube evaporator that improves air convection by setting convection holes in the heat sink. However, the evaporator tube is simply limited by vertical folds and does not form a continuous curved wrapping structure, which makes the evaporator tube easy to loosen during transportation vibration. In addition, the contact area between the fixing structure and the pipe is small, which cannot meet the requirements of long-term stable operation. Another example is patent CN213273390U, which discloses a plate-tube refrigeration evaporator with a reinforcing rib structure. Although the plate rigidity is enhanced by multi-layer folds, the fold structure is not designed in coordination with the convection holes. Moreover, it is only suitable for single-tube fixed scenarios and cannot achieve reliable limiting when two tubes are arranged in parallel, making it difficult to adapt to equipment with different cooling capacity requirements.

[0004] The core defects of the aforementioned existing technologies are as follows: on the one hand, due to structural design limitations, traditional fixing methods suffer from problems such as unstable fixing of evaporator tubes and easy detachment; on the other hand, existing technologies do not consider the structural adaptability of single-tube / double-tube variable arrangement, which restricts the application of evaporators in different cooling power scenarios. Utility Model Content

[0005] The present invention aims to provide a plate-tube refrigeration evaporator to solve the technical problems of easy loosening of the fixed structure of the evaporation tube, low air convection efficiency, and inability to adapt to single / double tube variable arrangement in existing plate-tube refrigeration evaporators.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a plate-tube refrigeration evaporator, including an evaporation plate and an evaporation tube, the evaporation tube being fixed on the evaporation plate, both ends of the evaporation tube being located on the same side of the evaporation plate, the evaporation plate having multiple stamping holes arranged in pairs opposite each other, the opposite ends of the opposite stamping holes having a first folded edge, the evaporation tube being installed in the inner area of ​​the opposite first folded edge, and the evaporation tube in the inner area can be arranged in a single tube independently fixed or double tubes parallel fixed form, the two sides of the evaporation plate being connected in sequence to a second folded edge and a third folded edge, the upper and lower ends of the second folded edge having notches, the two ends of the evaporation tube passing through the notches.

[0007] The working principle of this invention is as follows: The refrigerant flowing inside the evaporator tube evaporates and absorbs heat under low pressure, causing the temperature of the evaporator plate to decrease. The two opposing punches on the evaporator plate form a directional airflow channel. Driven by the temperature difference, air flows in from one set of punches and out from the other set, carrying away the cooling capacity of the evaporator plate through convection and heat transfer, thus achieving cooling of the surrounding environment. The two ends of the evaporator tube are concentrated on the same side of the evaporator plate and pass through the notch of the second fold, which facilitates connection with external refrigeration pipelines and reduces pipe bending losses. The inner area of ​​the first fold relative to the punches provides installation space for the evaporator tube. The bending and wrapping of the first, second, and third folds achieves mechanical fixation of a single or double tube, which not only restricts the displacement of the evaporator tube but also avoids the loosening problem caused by traditional clamp fixation. The fold structure also enhances the overall rigidity of the evaporator plate, preventing deformation caused by temperature changes and ensuring long-term stable operation of the evaporator.

[0008] The beneficial effects of this utility model are as follows: 1. The two ends of the evaporator tube are located on the same side of the evaporator plate, which facilitates centralized pipe arrangement and port connection, reduces pipe bending losses, and improves the convenience of installation and maintenance; 2. The stamping holes are arranged in pairs opposite each other and cooperate with the first folded edge to form a directional airflow channel, promoting interlayer air convection circulation. Compared with the traditional uniformly distributed convection holes, it can increase the airflow velocity and enhance the heat exchange efficiency; 3. The evaporator tube is installed in the area inside the first folded edge, and mechanical restraint is achieved by bending and wrapping the folded edge, avoiding the pipe loosening problem caused by the clamp fixation in the prior art. At the same time, the single-tube / double-tube variable arrangement allows the evaporator to adapt to different cooling capacity requirements and expand the application scenarios.

[0009] Furthermore, the shape of the stamping opening is an isosceles trapezoid with its bases facing each other. Compared to a circular hole, the isosceles trapezoidal design allows the airflow to be guided by the trapezoidal hypotenuse to form a vortex, increasing the contact time between the air and the evaporator plate. Simultaneously, the trapezoidal structure enhances the strength of the plate surrounding the stamping opening, reducing the risk of deformation.

[0010] Furthermore, the evaporator plate has a multi-layer structure, with corresponding positions and numbers of stamping ports on each layer. This multi-layer structure and corresponding number of stamping ports on each layer create a continuous vertical convection channel, reducing the resistance to the downward movement of cold air between layers and facilitating a smoother upward path for hot air.

[0011] Furthermore, the heights of the first, second, and third folds are 1 / 2 to 2 / 3 of the outer diameter of the evaporator tube. Limiting the fold height to 1 / 2 to 2 / 3 of the outer diameter of the evaporator tube ensures an interference fit when the folds wrap around the pipe, guaranteeing both structural rigidity and preventing excessive compression that could deform the pipe.

[0012] Furthermore, when the evaporator tube is fixed independently as a single tube, the width relative to the first fold is the width of the evaporator tube, and the height relative to the first fold is 1 / 2 of the outer diameter of the evaporator tube. When a single tube is fixed, the width of the first fold matches the pipe, and the height is 1 / 2 of the outer diameter, ensuring that the fitting length between the fold and the pipe during single-tube installation is 1 / 3 to 1 / 2 of the pipe circumference. This ensures the fixing strength while reducing the obstruction of the pipe's heat exchange surface.

[0013] Furthermore, when the evaporator tubes are fixed in parallel as two tubes, the width relative to the first fold is the sum of the widths of the two evaporator tubes, and the height relative to the first fold is 2 / 3 of the outer diameter of the evaporator tube. When the two tubes are fixed in parallel, the fold width is the total width of the two tubes, and the height is 2 / 3 of the outer diameter. By increasing the wrapping area, the two tubes are synchronously limited, avoiding mutual friction caused by vibration of the parallel pipes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the assembly of a plate-tube type freeze evaporator according to the present invention;

[0015] Figure 2 for Figure 1 Schematic diagram of the structure of the middle evaporator plate;

[0016] Figure 3 for Figure 2 A bottom view;

[0017] Figure 4 for Figure 3 A sectional view.

[0018] The reference numerals in the accompanying drawings include: evaporator plate 1, stamping port 2, first fold 201, second fold 3, third fold 4, and evaporator tube 5. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation methods:

[0020] Example 1 is basically as shown in the appendix. Figure 1 -Appendix Figure 4The image shows a plate-tube refrigeration evaporator, comprising an evaporating plate 1 and evaporating tubes 5. Both ends of the evaporating tubes 5 are located on the right side of the evaporating plate 1. A second folded edge 3 is fixedly connected to the right side of the evaporating plate 1, and a third folded edge 4 is fixedly connected to the left side of the evaporating plate 1. The second folded edge 3 has notches at its upper and lower ends, through which the two ends of the evaporating tubes 5 pass. The evaporating plate 1 has thirty-one stamping ports 2, each stamping port 2 being an isosceles trapezoid. Twenty-four of these stamping ports 2 are horizontally staggered in pairs and arranged in three rows horizontally. Four of these stamping ports... 2. The two are arranged in pairs, one above the other and horizontally. The bottom edges of the remaining three stamping ports 2 are parallel to and opposite to the third folded edge 4. The opposite ends of the stamping ports 2 are all fixedly stamped and integrally formed with a first folded edge 201. The evaporator tube 5 is detachably installed in the inner area of ​​the first folded edge 201. In the inner area, the evaporator tube 5 is fixed independently as a single tube. The first folded edge 201 and the third folded edge 4 are bent and slidably connected to the evaporator tube 5. The width of the first folded edge 201 is the width of the evaporator tube 5, and the height of the first folded edge 201 is 1 / 2 of the outer diameter of the evaporator tube 5.

[0021] Example 2 is attached. Figure 1-4 As shown: the evaporator tube 5 is fixed in parallel with two tubes in the inner area relative to the first fold 201. The first fold 201 and the third fold 4 are bent and slidably connected to the evaporator tube 5. The width of the first fold 201 is the sum of the widths of the two evaporator tubes 5, and the height of the first fold 201 is 2 / 3 of the outer diameter of the evaporator tube 5.

[0022] Example 3 is attached. Figure 1-4 As shown: the evaporator tube 5 is fixed in the inner region relative to the first fold 201 by a combination of single tube independent and double tube parallel.

[0023] The specific implementation process is as follows: First, use a stamping die to process 31 isosceles trapezoidal stamping holes 2 on the surface of the aluminum plate as required. Then, bend the two sides of the aluminum plate three times: first, bend along the opposite ends of the stamping holes 2 to form the first fold 201 with a bending angle of 90 degrees, and then bend in sequence to form the second fold 3 and the third fold 4, so that the upper and lower ends of the second fold 3 form notches. Then, place the evaporator tube 5 in the inner area of ​​the relative first fold 201. When fixing a single tube, make the width of the relative first fold 201 match the diameter of the evaporator tube 5 and the height be half of the outer diameter of the evaporator tube 5. When fixing two tubes, the width of the relative first fold 201 is the total width of the two evaporator tubes 5 and the height is two-thirds of the outer diameter of the evaporator tube 5. Use a bending machine to continuously bend and wrap the first fold 201, the second fold 3 and the third fold 4 to wrap the evaporator tube 5, ensuring that there is a gap in the wrapping. Finally, pass the two ends of the evaporator tube 5 through the notch of the second fold 3, use a tube expansion tool to widen the port, and test the sealing performance through nitrogen pressure test to complete the evaporator assembly.

[0024] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A plate-tube type freeze evaporator, comprising an evaporation plate and evaporation tubes, wherein the evaporation tubes are fixed on the evaporation plate, characterized in that: Both ends of the evaporator tube are located on the same side of the evaporator plate. The evaporator plate is provided with multiple stamping holes, which are arranged in pairs opposite each other. The opposite ends of the opposite stamping holes are provided with a first folded edge. The evaporator tube is installed in the inner area of ​​the opposite first folded edge. In the inner area, the evaporator tube can be arranged in a single tube fixed independently or in a double tube fixed in parallel. The two sides of the evaporator plate are connected to a second folded edge and a third folded edge in sequence. The upper and lower ends of the second folded edge are provided with notches, and the two ends of the evaporator tube pass through the notches.

2. A plate and tube refrigeration evaporator as claimed in claim 1, wherein: The stamping opening is an isosceles trapezoid with its bases facing each other.

3. A plate-tube type freeze evaporator according to claim 2, characterized in that: The evaporation plate has a multi-layer structure, and the position and number of the stamping holes on each layer of the evaporation plate are corresponding.

4. A plate-tube type freeze evaporator according to claim 3, characterized in that: The heights of the first, second, and third folds are 1 / 2 to 2 / 3 of the outer diameter of the evaporator tube.

5. A plate-tube type freeze evaporator according to claim 4, characterized in that: When the evaporator tube is fixed independently as a single tube, the width relative to the first fold is the width of the evaporator tube, and the height relative to the first fold is 1 / 2 of the outer diameter of the evaporator tube.

6. A plate-tube type freeze evaporator according to claim 4, characterized in that: When the evaporator tubes are fixed in parallel as two tubes, the width relative to the first fold is the sum of the widths of the two evaporator tubes, and the height relative to the first fold is 2 / 3 of the outer diameter of the evaporator tube.

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