Gradually-changed top air outlet U-shaped condenser

Abstract

According to the gradual change type top air outlet U-shaped condenser, the row number of heat exchange pipes, the distance between the heat exchange pipes and the distance between fins are gradually changed along with increasing of the distance between the condenser and a top fan from top to bottom, namely, the row number of the heat exchange pipes is gradually reduced, the distance between the heat exchange pipes is gradually increased, or the distance between the fins is gradually increased. The utility model provides a gradual change type top air outlet U-shaped condenser capable of improving heat exchange efficiency.

Description

Technical Field

[0001] The utility model belongs to a condenser, in particular to an upward air discharge U-shaped condenser. Background Art

[0002] A condenser is a key component for a refrigeration or heat pump system to discharge heat to the outside. The heat transfer efficiency of the condenser affects the energy efficiency of the refrigeration or heat pump system. In the context of current energy conservation and carbon reduction, it is very important to improve the efficiency of the condenser. In addition, condensers are mostly made of copper tubes, and their cost accounts for a relatively high proportion of the overall cost of the refrigeration or heat pump system. On the premise of ensuring heat transfer performance, reducing unnecessary pipe consumption to improve economy is a key direction for enterprises to enhance their competitiveness. The upward air discharge U-shaped condenser is a common form in refrigeration and heat pump systems, with a compact volume, small floor area, and convenient for large-scale arrangement. However, in the existing upward air discharge U-shaped condenser, the fan is located at the top of the condenser, resulting in an uneven flow field. The upper part is close to the fan, with a fast flow rate, a large flow rate per unit cross-sectional area, and the lower part is far from the wind, with a slow flow rate and a small flow rate per unit cross-sectional area. The existing upward air discharge U-shaped condensers often have uniform tube arrangement, resulting in insufficient heat transfer capacity of the upper heat exchange tubes and excessive heat transfer capacity of the lower heat exchange tubes, causing waste of heat exchange tubes. Therefore, the innovation and improvement of the upward air discharge U-shaped condenser are imminent. Summary of the Invention

[0003] In order to overcome the deficiency of the existing upward air discharge U-shaped condenser with relatively low heat transfer efficiency, the utility model provides a gradient upward air discharge U-shaped condenser with improved heat transfer efficiency.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] A gradient upward air discharge U-shaped condenser, from top to bottom according to the distance from the top fan, the number of rows of heat exchange tubes, the spacing of heat exchange tubes, and the fin spacing gradually change with the increase of the distance from the top fan, that is, the number of rows of heat exchange tubes gradually decreases, the spacing of heat exchange tubes gradually increases, or the fin spacing gradually increases.

[0006] Furthermore, in the gradient change with the increase of the distance from the top fan, the number of rows of heat exchange tubes, the spacing of heat exchange tubes, and the fin spacing can change simultaneously, or only one or two of them can change.

[0007] Furthermore, it is divided into an upper region, a middle region, and a lower region from top to bottom according to the distance from the top fan. The distance between the upper region and the top fan is less than 1 / 3 of the total height of the heat exchange coil. The number of tube rows is set in the range of 2 to 4 rows, the fin pitch is relatively small, being 1.2 to 2.2 mm. For heat exchange tubes with a diameter of more than 9 mm, the tube pitch range is 18 to 26 mm; for heat exchange tubes with a diameter of 7 to 9 mm, the tube pitch range is 12 to 22 mm; for heat exchange tubes with a diameter of less than 7 mm, the tube pitch range is 9 to 16 mm. A baffle is arranged at the bottom of the outer tube row of the lowermost row of heat exchange tubes in the upper region to prevent the incoming air from flowing vertically.

[0008] The distance between the middle region and the fan is 1 / 3 to 2 / 3 of the total height of the heat exchange coil. The number of tube rows is set in the range of 1 to 3 rows, the fin pitch is medium, being 1.8 to 2.6 mm. For heat exchange tubes with a diameter of more than 9 mm, the tube pitch range is 22 to 30 mm; for heat exchange tubes with a diameter of 7 to 9 mm, the tube pitch range is 16 to 26 mm; for heat exchange tubes with a diameter of less than 7 mm, the tube pitch range is 12 to 20 mm. A baffle is arranged at the bottom of the outer tube row of the lowermost row of heat exchange tubes in the middle region to prevent the incoming air from flowing vertically.

[0009] The distance between the lower region and the fan is greater than 2 / 3 of the total height of the heat exchange coil. The number of tube rows is set in the range of 1 to 2 rows, the fin pitch is relatively large, being 2.2 to 3.0 mm. For heat exchange tubes with a diameter of more than 9 mm, the tube pitch range is 25 to 34 mm; for heat exchange tubes with a diameter of 7 to 9 mm, the tube pitch range is 20 to 30 mm; for heat exchange tubes with a diameter of less than 7 mm, the tube pitch range is 15 to 23 mm. The classification according to the change of the distance from the fan can be three grades, or two grades, four grades, or other numbers of grades. This solution is the case of three grades, and in this solution, the number of heat exchange tube rows, the heat exchange tube spacing, and the fin pitch change simultaneously.

[0010] The beneficial effects of the present utility model are mainly manifested in that: the internal heat exchange tubes and their fin parameters of the top - air - out U - shaped condenser are improved to match the internal flow field, and more heat exchange occurs in the area with a large flow rate, which can significantly improve the heat exchange efficiency of the condenser and achieve the effect of reducing materials and increasing efficiency. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of a gradually - changing top - air - out U - shaped condenser. 1. Fan, 2. U - shaped heat exchange tube, 3. Inlet air grille, 4. Side inlet air grille.

[0012] Figure 2 It is a top - view of the U - shaped heat exchange tube.

[0013] Figure 3 It is Figure 1Cross-sectional view of pipeline A-A, 1. Fan, 5. Upper baffle, 6. Middle baffle.

[0014] Figure 4 Yes Figure 3 Cross-sectional view of fin B-B, 7. Fin. Specific implementation mode

[0015] The present utility model will be further described below with reference to the accompanying drawings.

[0016] Refer to Figures 1 to 4 , a gradually changing top air outlet U-shaped condenser. From top to bottom according to the distance from the top fan, the number of rows of heat exchange tubes, the spacing of heat exchange tubes, and the spacing of fins gradually change with the increase of the distance from the top fan, that is, the number of rows of heat exchange tubes gradually decreases, the spacing of heat exchange tubes gradually increases, or the spacing between fins gradually increases.

[0017] Further, in the gradual change that occurs with the increase of the distance from the top fan, the number of rows of heat exchange tubes, the spacing of heat exchange tubes, and the spacing of fins can change simultaneously, or only one or two of them can change.

[0018] Furthermore, it is divided into an upper region, a middle region, and a lower region from top to bottom according to the distance from the top fan. The distance between the upper region and the top fan is less than 1 / 3 of the total height of the heat exchange coil. The number of tube rows is set in the range of 2 to 4 rows, the fin spacing is relatively small, 1.2 to 2.2 mm. For heat exchange tubes with a diameter of more than 9 mm, the tube pitch range is 18 to 26 mm. For heat exchange tubes with a diameter of 7 to 9 mm, the tube pitch range is 12 to 22 mm. For heat exchange tubes with a diameter of less than 7 mm, the tube pitch range is 9 to 16 mm. A baffle is arranged at the bottom of the outer tube row of the bottom row of heat exchange tubes in the upper region to prevent the incoming air from flowing vertically;

[0019] The distance between the middle region and the fan is 1 / 3 to 2 / 3 of the total height of the heat exchange coil. The number of tube rows is set in the range of 1 to 3 rows, the fin spacing is medium, 1.8 to 2.6 mm. For heat exchange tubes with a diameter of more than 9 mm, the tube pitch range is 22 to 30 mm. For heat exchange tubes with a diameter of 7 to 9 mm, the tube pitch range is 16 to 26 mm. For heat exchange tubes with a diameter of less than 7 mm, the tube pitch range is 12 to 20 mm. A baffle is arranged at the bottom of the outer tube row of the bottom row of heat exchange tubes in the middle region to prevent the incoming air from flowing vertically;

[0020] The distance between the lower area and the fan is greater than 2 / 3 of the total height of the heat exchange coil, the number of tube rows is set to 1 to 2 rows, the maximum fin spacing is 2.2 to 3.0 mm, for heat exchange tubes with a diameter of more than 9 mm, the heat exchange tube spacing range is 25 to 34 mm, for heat exchange tubes with a diameter of 7 to 9 mm, the heat exchange tube spacing range is 20 to 30 mm, and for heat exchange tubes with a diameter of less than 7 mm, the heat exchange tube spacing range is 15 to 23 mm. The classification that changes with the distance from the fan can be three gears, or it can be two gears or four gears and other numbers of gears. This scheme is a three-gear case, and in this scheme, the number of heat exchange tube rows, the heat exchange tube spacing, and the fin spacing change at the same time.

[0021] Example: When the distance from the fan is less than 1 / 3 of the total height of the heat exchange coil, the number of tube rows is set to 3, the fin spacing is 1.5mm, the heat exchange tube diameter is 10mm, and the heat exchange tube spacing is 22mm. When the distance from the fan is between 1 / 3 and 2 / 3 of the total height of the heat exchange coil, the number of tube rows is set to 2, the fin spacing is 1.8mm, the heat exchange tube diameter is 10mm, and the heat exchange tube spacing is 25mm. When the distance from the fan is greater than 2 / 3 of the total height of the heat exchange coil, the number of tube rows is set to 1, the fin spacing is 2.3mm, the heat exchange tube diameter is 10mm, and the heat exchange tube spacing is 28mm.

[0022] The contents described in the embodiments of this specification are merely enumerations of implementation forms of the utility model concept and are for illustrative purposes only. The protection scope of the utility model should not be considered to be limited to the specific forms described in this embodiment, and the protection scope of the utility model also extends to equivalent technical means that ordinary technicians in this field can think of based on the concept of the utility model.

Claims

1. A gradient top-outlet U-shaped condenser, characterized in that, From top to bottom according to the distance from the top fan, the number of rows of heat exchange tubes, the spacing between heat exchange tubes, and the fin pitch gradually change as the distance from the top fan increases, that is, the number of rows of heat exchange tubes gradually decreases, the spacing between heat exchange tubes gradually increases, or the fin pitch gradually increases.

2. The variable ejection air U-shaped condenser according to claim 1, characterized in that: During the gradual change that occurs as the distance from the top fan increases, the number of rows of heat exchange tubes, the spacing between heat exchange tubes, and the fin pitch change simultaneously or two of them change.

3. The variable ejection air outlet U-shaped condenser according to claim 2, characterized in that: It is divided into an upper region, a middle region, and a lower region from top to bottom according to the distance from the top fan. The distance between the upper region and the top fan is less than 1 / 3 of the total height of the heat exchange coil. The number of tube rows is set in the range of 2 to 4 rows. The fin pitch is relatively small, 1.2 to 2.2 mm. For heat exchange tubes with a diameter of more than 9 mm, the tube pitch range is 18 to 26 mm. For heat exchange tubes with a diameter of 7 to 9 mm, the tube pitch range is 12 to 22 mm. For heat exchange tubes with a diameter of less than 7 mm, the tube pitch range is 9 to 16 mm. A baffle is arranged at the bottom of the outer tube row of the bottom row of heat exchange tubes to prevent the incoming air from flowing vertically. The distance between the middle region and the fan is 1 / 3 to 2 / 3 of the total height of the heat exchange coil. The number of tube rows is set in the range of 1 to 3 rows. The fin pitch is medium, 1.8 to 2.6 mm. For heat exchange tubes with a diameter of more than 9 mm, the tube pitch range is 22 to 30 mm. For heat exchange tubes with a diameter of 7 to 9 mm, the tube pitch range is 16 to 26 mm. For heat exchange tubes with a diameter of less than 7 mm, the tube pitch range is 12 to 20 mm. A baffle is arranged at the bottom of the outer tube row of the bottom row of heat exchange tubes in the middle region to prevent the incoming air from flowing vertically. The distance between the lower region and the fan is greater than 2 / 3 of the total height of the heat exchange coil. The number of tube rows is set in the range of 1 to 2 rows. The fin pitch is relatively large, 2.2 to 3.0 mm. For heat exchange tubes with a diameter of more than 9 mm, the tube pitch range is 25 to 34 mm. For heat exchange tubes with a diameter of 7 to 9 mm, the tube pitch range is 20 to 30 mm. For heat exchange tubes with a diameter of less than 7 mm, the tube pitch range is 15 to 23 mm.

Images