Evaporator and air conditioning system

Abstract

The utility model provides an evaporator and an air conditioning system, the evaporator comprises a first fin, a second fin, a third fin, a first pipeline structure, a second pipeline structure and a third pipeline structure, the first pipeline structure comprises two first U-shaped pipes which are distributed at the first end, far away from the second fin, of the first fin; the first pipeline structure comprises eight first U-shaped pipes, a first flow path is formed between the two first U-shaped pipes, the second pipeline structure comprises eight second U-shaped pipes, the eight second U-shaped pipes are equally divided into two second flow paths, and the two second U-shaped pipes in one second flow path adjacent to the first fin are distributed at the second end, close to the second fin, of the first fin. The second outlets of the two second flow paths converge and communicate with the first end of a second pipeline, and an electromagnetic valve is arranged on the second pipeline. According to the evaporator, the heat exchange uniformity can be improved, so that uniform constant-temperature dehumidification is realized, and the use comfort of a user is improved.

Description

Technical Field

[0001] This utility model relates to the field of air heat exchanger technology, and in particular to an evaporator and an air conditioning system having the evaporator. Background Technology

[0002] With the development of air conditioning and people's increasing pursuit of quality of life, in addition to traditional cooling or heating needs, users hope that air conditioners can dehumidify indoor air in application scenarios with high air humidity.

[0003] Conventional air conditioning dehumidification technology involves operating the air conditioner in cooling mode. In this mode, the indoor unit's evaporator cools the indoor air until it reaches the dew point, at which point condensation occurs, thus achieving dehumidification. Therefore, the air conditioner inevitably lowers the indoor temperature during the dehumidification process, which can make users feel uncomfortable due to excessive cold, thereby affecting their comfort.

[0004] To ensure improved user comfort during dehumidification, a constant-temperature dehumidifying evaporator is provided, consisting of a first evaporator section and a second evaporator section. The first and second evaporator sections are connected by an expansion valve, ensuring that the temperature of the refrigerant in the second evaporator section is lower than that in the first evaporator section. The refrigerant in the second evaporator section exchanges heat with the indoor air to achieve dehumidification, and then mixes with the indoor air that has undergone heat exchange with the refrigerant in the first evaporator section to achieve constant temperature.

[0005] However, the first evaporator section of the existing constant temperature dehumidifier consists of a first evaporator and a second evaporator. The first evaporator, the second evaporator, and the second evaporator constitute a three-section evaporator. The first evaporator has four U-shaped tubes, and the piping area of ​​the first evaporator is too large. As a result, during the dehumidification process, the temperature of the large area of ​​the first evaporator is significantly higher than that of the second evaporator. This leads to uneven heat exchange over a large area in the first evaporator section, which affects the uniformity of the constant temperature airflow during dehumidification and consequently affects user comfort. Utility Model Content

[0006] The primary objective of this invention is to provide an evaporator that improves heat exchange uniformity, thereby achieving uniform temperature and humidity dehumidification and enhancing user comfort.

[0007] The second objective of this invention is to provide an air conditioning system for the aforementioned evaporator.

[0008] To achieve the primary objective of this utility model, it provides an evaporator comprising a first fin, a second fin, a third fin, a first piping structure, a second piping structure, and a third piping structure. The second fin is connected between the first fin and the third fin. The first piping structure includes two first U-shaped tubes distributed at the first end of the first fin away from the second fin, forming a first flow path between the two first U-shaped tubes. The first inlet of the first flow path is connected to an outdoor refrigerant outlet via the first piping. The first inlet is located on the windward side of the first fin and close to the second fin. An expansion valve is installed on the first piping. The second piping structure includes eight second U-shaped tubes, which are evenly distributed to form two second flow paths. One second flow path is adjacent to the first fin. Two second U-shaped tubes in the flow path are distributed at the second end of the first fin near the second fin. Four second U-shaped tubes in another second flow path are distributed at the end of the second fin away from the first fin. The first outlet of the first flow path is connected to the second inlet of the two second flow paths. The first outlet is located on the leeward side of the first fin and is set close to the second fin. The second outlets of the two second flow paths merge and connect to the first end of the second pipe. A solenoid valve is installed on the second pipe. The third pipe structure includes multiple third U-shaped tubes. The multiple third U-shaped tubes are distributed on the third fin and are evenly divided to form two third flow paths. The second end of the second pipe is connected to the third inlet of the two third flow paths. The third outlets of the two third flow paths merge and connect to the ground of the third pipe for connection with the outdoor refrigerant inlet.

[0009] As can be seen from the above scheme, when the evaporator of this utility model does not activate the constant temperature dehumidification function, that is, when the evaporator of this utility model is performing normal cooling / heating, the expansion valve on the first pipeline is normally controlled, and the solenoid valve on the second pipeline is not energized. At this time, the solenoid valve on the second pipeline does not activate the throttling function, so the outdoor refrigerant flows into the first pipeline through the outdoor refrigerant outlet. The expansion valve on the first pipeline normally controls the refrigerant in the first pipeline to send the refrigerant into the first flow path. The refrigerant in the first flow path flows into the two second flow paths through the two second inlets respectively. Then the refrigerant in the two second flow paths merges and flows into the second pipeline. Since the solenoid valve on the second pipeline does not activate the throttling function, the refrigerant in the second pipeline does not experience the throttling effect of the solenoid valve and flows into the two third flow paths through the two third inlets respectively. Afterwards, the refrigerant in the two third flow paths merges and flows back into the third pipeline to the outdoor refrigerant inlet, thus performing normal cooling / heating operation.

[0010] When the evaporator of this invention activates its dehumidification function, the expansion valve on the first pipeline opens to its maximum, and the solenoid valve on the second pipeline is energized and opens for throttling control. Under the throttling control of the solenoid valve, the temperature of the refrigerant in the first and second flow paths of the evaporator is higher than the temperature of the refrigerant in the third flow path of the evaporator. This results in a heating effect in the first and second flow paths of the evaporator, while the third flow path generates a cooling effect. At this time, the refrigerant in the third flow path exchanges heat with the indoor air to condense water and achieve dehumidification. Furthermore, the cold air after heat exchange with the refrigerant in the third flow path mixes with the hot air after heat exchange with the refrigerant in the first and second flow paths. The mixed air can maintain a temperature that is basically the same as the original heat exchange temperature, thereby achieving constant temperature dehumidification and improving user comfort.

[0011] The first piping structure of the evaporator of this utility model includes two first U-shaped tubes distributed at the first end of the first fin away from the second fin. A first flow path is formed between the two first U-shaped tubes. The first inlet of the first flow path is located on the windward side of the first fin and close to the second fin, and the first outlet of the first flow path is located on the leeward side of the first fin and close to the second fin. Furthermore, the second piping structure of the evaporator of this utility model includes eight second U-shaped tubes, which are evenly distributed to form two second flow paths. Two second U-shaped tubes in one second flow path adjacent to the first fin are distributed at the second end of the first fin close to the second fin, and four second U-shaped tubes in the other second flow path are distributed on the second fin away from the first fin. At one end, compared to the existing evaporator with four U-shaped tubes in the first section, the evaporator of this invention only has two first U-shaped tubes in the first flow path near the expansion valve. This reduces the area of ​​the first U-shaped tubes in the first flow path near the expansion valve, preventing the temperature of the first flow path from being significantly higher than that of the second flow path. Furthermore, in the second flow path of the second pipeline structure, the two second U-shaped tubes are distributed at the second end of the first fin near the second fin. This ensures more uniform heat exchange between the first and second fins when the dehumidification function is activated, and makes the heat exchange between the first and second fins more thorough, thereby achieving uniform and constant temperature dehumidification and improving user comfort.

[0012] Therefore, the reasonable distribution of pipes on the first, second, and third fins of the evaporator of this utility model can improve the uniformity of heat exchange, thereby achieving uniform constant temperature dehumidification and improving user comfort.

[0013] A preferred embodiment is that two third inlets are located on the windward side of the third fin and close to the second fin, and two third outlets are located on the leeward side of the third fin and away from the second fin. The second pipeline includes a first pipe section and a second pipe section. The first pipe section connects the first port of the solenoid valve and the two second outlets. The second port of the solenoid valve is connected to the first end of the second pipe section. The second pipe section is U-shaped, and the second end of the second pipe section is provided with a first diversion port and a second diversion port. The first diversion port is located close to the outer periphery of the second pipe section away from its open end, and the first diversion port is connected to a third inlet away from the second fin through a fourth pipe. The second diversion port is located close to the open end of the second pipe section, and the second diversion port is connected to another third inlet close to the second fin through a fifth pipe.

[0014] A further proposed solution is to use six third U-shaped tubes.

[0015] A further alternative is that the two second inlets are located on the windward side of the second fin and in the middle of the second duct structure; and / or, the two second outlets are located on the leeward side of the second fin and in the middle of the second duct structure.

[0016] A further proposed solution is that the first included angle between the leeward side of the first fin and the leeward side of the second fin is an obtuse angle; and / or, the second included angle between the leeward side of the second fin and the leeward side of the third fin is an acute angle.

[0017] A further proposed solution is that the first fin is located below the second fin in the vertical direction, and the first fin is also located below the third fin in the vertical direction.

[0018] A further proposed solution is to extend the first fin vertically.

[0019] A further proposed solution is to install a temperature sensing bulb at the end of the third pipeline structure near the second fin.

[0020] A further step is to install a filter on the first pipeline.

[0021] To achieve the second objective of this utility model, this utility model provides an air conditioning system, including an evaporator, which is the evaporator described above. Attached Figure Description

[0022] Figure 1 This is a first-view structural diagram of an embodiment of the evaporator of this utility model.

[0023] Figure 2 This is a second-view structural diagram of an embodiment of the evaporator of this utility model.

[0024] Figure 3 This is a front view of an embodiment of the evaporator of this utility model.

[0025] Figure 4 This is a side view of an embodiment of the evaporator of this utility model.

[0026] Figure 5 This is a partial structural diagram of an embodiment of the evaporator of this utility model.

[0027] Figure 6 This is a structural diagram of the first U-shaped tube, the second U-shaped tube, and the third U-shaped tube in the embodiment of the evaporator of this utility model.

[0028] Figure 7 This is a side view schematic diagram of an embodiment of the evaporator of this utility model.

[0029] Figure 8 This is a front view of the second pipe section and its cooperation with the solenoid valve in an embodiment of the evaporator of this utility model.

[0030] Figure 9 This is a side view of the second pipe section in conjunction with the solenoid valve in an embodiment of the evaporator of this utility model.

[0031] Figure 10 This is a schematic diagram showing the combination of the first fin, the second fin, and the third fin in an embodiment of the evaporator of this utility model.

[0032] Figure 11 This is a schematic diagram of the refrigerant flow direction in an embodiment of the evaporator of this utility model.

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0034] See Figures 1 to 11This embodiment discloses an evaporator 10, including a first fin 11, a second fin 12, a third fin 13, a first pipe structure, a second pipe structure, and a third pipe structure. The second fin 12 is connected between the first fin 11 and the third fin 13. The first pipe structure includes two first U-shaped tubes 111 distributed at the first end of the first fin 11 away from the second fin 12. A first flow path 112 is formed between the two first U-shaped tubes 111. The first inlet 1111 of the first flow path 112 is connected to an outdoor refrigerant outlet via a first pipe 14. The first inlet 1111 is located on the windward side of the first fin 11 and close to the second fin 12. An expansion valve 110 is provided on the first pipe 14. Meanwhile, the second pipeline structure in this embodiment includes eight second U-shaped tubes 121, which are evenly distributed to form two second flow paths 122. Two second U-shaped tubes 121 in one second flow path 122 adjacent to the first fin 11 are distributed at the second end of the first fin 11 near the second fin 12, and four second U-shaped tubes 121 in the other second flow path 122 are distributed at the end of the second fin 12 away from the first fin 11. The first outlet 1112 of the first flow path 112 is connected to the second inlet 1211 of the two second flow paths 122 through the sixth pipeline 18. The first outlet 1112 is located on the leeward side of the first fin 11 and is set close to the second fin 12. The second outlets 1212 of the two second flow paths 122 merge and connect to the first end of the second pipeline. A solenoid valve 17 is provided on the second pipeline. Furthermore, the third pipeline structure in this embodiment includes multiple third U-shaped pipes 131, which are distributed on the third fin 13 and evenly divided to form two third flow paths 132. The second end of the second pipeline is connected to the third inlet 1311 of the two third flow paths 132, and the third outlet 1312 of the two third flow paths 132 merges and connects to the third pipeline 15 for connection with the outdoor refrigerant inlet.

[0035] When the evaporator 10 in this embodiment does not activate the constant temperature dehumidification function, that is, when the evaporator 10 in this embodiment is performing normal cooling / heating, the expansion valve 110 on the first pipe 14 is normally controlled, and the solenoid valve 17 on the second pipe is not energized. At this time, the solenoid valve 17 on the second pipe does not activate the throttling function, so the outdoor refrigerant flows into the first pipe 14 through the outdoor refrigerant outlet. The expansion valve 110 on the first pipe 14 normally controls the refrigerant in the first pipe 14 to send the refrigerant into the first flow path 112. The refrigerant in the first flow path 112... The refrigerant flows into the two second flow paths 122 through the two second inlets 1211. Then, the refrigerant in the two second flow paths 122 merges and flows into the second pipe. Since the solenoid valve 17 on the second pipe does not open its throttling function, the refrigerant in the second pipe does not experience the throttling effect of the solenoid valve 17 and flows into the two third inlets 1311 through the two third flow paths 132. Afterward, the refrigerant in the two third flow paths 132 merges and flows back into the third pipe 15 to the outdoor refrigerant inlet, thus performing normal cooling / heating operation.

[0036] When the evaporator 10 in this embodiment starts the dehumidification function, the expansion valve 110 on the first pipe 14 is opened to the maximum, and the solenoid valve 17 on the second pipe is energized and opens for throttling control. Under the throttling control of the solenoid valve 17, the temperature of the refrigerant in the first flow path 112 and the second flow path 122 of the evaporator 10 is higher than the temperature of the refrigerant in the third flow path 132 of the evaporator 10. This causes the first flow path 112 and the second flow path 122 of the evaporator 10 to form a heating effect, while the third flow path 132 forms a cooling effect. At this time, the refrigerant in the third flow path 132 exchanges heat with the indoor air to condense water and achieve dehumidification. The cold air after heat exchange with the refrigerant in the third flow path 132 mixes with the hot air after heat exchange with the refrigerant in the first flow path 112 and the second flow path 122. The mixed heat exchange air can be basically the same as the original heat exchange temperature, thereby achieving constant temperature dehumidification and improving user comfort.

[0037] The first piping structure of the evaporator 10 in this embodiment includes two first U-shaped tubes 111 distributed at the first end of the first fin 11 away from the second fin 12. A first flow path 112 is formed between the two first U-shaped tubes 111. The first inlet 1111 of the first flow path 112 is located on the windward side of the first fin 11 and close to the second fin 12, and the first outlet 1112 of the first flow path 112 is located on the leeward side of the first fin 11 and close to the second fin 12. Furthermore, the second piping structure of the evaporator 10 in this embodiment includes eight second U-shaped tubes 121, which are evenly distributed to form two second flow paths 122. Two second U-shaped tubes 121 in one second flow path 122 adjacent to the first fin 11 are distributed at the second end of the first fin 11 close to the second fin 12, and the four second U-shaped tubes 121 in the other second flow path 122 are distributed at the second end of the first fin 11. The end of fin 12 away from the first fin 11 has four U-shaped tubes compared to the first section of the existing evaporator. In this embodiment, the first section of the first flow path 112 near the expansion valve 110 of the evaporator 10 only has two first U-shaped tubes 111, thereby reducing the arrangement area of ​​the first U-shaped tubes 111 near the expansion valve 110. This avoids the temperature of the first section of the first flow path 112 being significantly higher than the temperature of the second flow path 122. Furthermore, the two second U-shaped tubes 121 in one of the second flow paths 122 of the second pipeline structure are distributed at the second end of the first fin 11 near the second fin 12. This ensures that the heat exchange between the first fin 11 and the second fin 12 is more uniform and more sufficient when the dehumidification function is turned on, thereby achieving uniform constant temperature dehumidification and improving user comfort.

[0038] Therefore, in this embodiment, the pipes on the first fin 11, the second fin 12 and the third fin 13 of the evaporator 10 are reasonably distributed, which can improve the heat exchange uniformity, thereby achieving uniform constant temperature dehumidification and improving user comfort.

[0039] To improve the heat transfer uniformity and efficiency of the two third flow paths 132 on the third fin 13, in this embodiment, the two third inlets 1311 are located on the windward side of the third fin 13 and close to the second fin 12, and the two third outlets 1312 are located on the leeward side of the third fin 13 and away from the second fin 12. Furthermore, in this embodiment, the second pipeline includes a first pipe section 115 and a second pipe section 19. The first pipe section 115 connects the first port of the solenoid valve 17 and the two second outlets 1212. The second port of the solenoid valve 17 connects to the first port of the second pipe section 19. One end is connected, the second pipe section 19 is arranged in a U shape, and the second end of the second pipe section 19 is provided with a first diversion port 191 and a second diversion port 192. The first diversion port 191 is located near the outer periphery of the second pipe section 19 away from its open end, and the first diversion port 191 is connected to a third inlet 1311 away from the second fin 12 through a fourth pipe 113. The second diversion port 192 is located near the open end of the second pipe section 19, and the second diversion port 192 is connected to another third inlet 1311 near the second fin 12 through a fifth pipe 112. Since the second port of the solenoid valve 17 in this embodiment is connected to the first end of the second pipe section 19, and the second pipe section 19 is U-shaped, under the action of the centrifugal force of the U-shape, more refrigerant is distributed and the flow rate is faster in the outer periphery of the U-shaped second pipe section 19 away from its open end. Therefore, the first branch port 191 located near the outer periphery of the second pipe section 19 is connected to a third inlet 1311 away from the second fin 12 through the fourth pipe 113, so that more refrigerant flows in from the third inlet 1311 away from the second fin 12. Within a third flow path 132, a second branch port 192, located near the open end of the second pipe section 19, is connected via a fifth pipe 112 to another third inlet 1311 near the second fin 12. This allows a smaller amount of refrigerant to flow from the other third inlet 1311 near the second fin 12 into the other third flow path 132. Because the two third inlets 1311 are located close to the second fin 12, the heat exchange in the two offset third flow paths 132 on the windward side of the third fin 13 is uniform. Preferably, in this embodiment, the number of third U-shaped tubes 131 is six.

[0040] To further improve heat exchange uniformity, in this embodiment, the two second inlets 1211 are located on the windward side of the second fin 12 and in the middle of the second pipeline structure, and in this embodiment, the two second outlets 1212 are located on the leeward side of the second fin 12 and in the middle of the second pipeline structure.

[0041] To prevent the solenoid valve 17 from becoming clogged and affecting its performance, a filter 16 is also provided on the first pipeline 14 in this embodiment. The filter 16 can filter the refrigerant flowing into the first pipeline 14 to filter out the residues and debris carried by the refrigerant, so as to prevent the refrigerant carrying residues and debris from flowing through the solenoid valve 17. The valve core gap of the solenoid valve 17 is small, which can easily cause the valve core to become clogged.

[0042] In order to meet the design requirement that the temperature sensor be installed at the lowest temperature position in the pipe, a temperature sensor 114 is provided at one end of the third pipe 15 structure near the second fin 12 in this embodiment.

[0043] To further improve heat transfer uniformity, in this embodiment, the first included angle θ between the leeward side of the first fin 11 and the leeward side of the second fin 12 is an obtuse angle, and the second included angle β between the leeward side of the second fin 12 and the leeward side of the third fin 13 is an acute angle. Specifically, in this embodiment, the first fin 11 is located below the second fin 12 in the vertical direction, and the first fin 11 is also located below the third fin 13 in the vertical direction. Preferably, in this embodiment, the first fin 11 extends in the vertical direction.

[0044] The above embodiments are merely preferred examples of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles of this utility model patent application should be included within the scope of this utility model patent application.

Claims

1. An evaporator, comprising a first fin, a second fin, and a third fin, wherein the second fin is connected between the first fin and the third fin, characterized in that: The evaporator further includes a first pipeline structure, a second pipeline structure, and a third pipeline structure. The first pipeline structure includes two first U-shaped tubes distributed at the first end of the first fin away from the second fin. A first flow path is formed between the two first U-shaped tubes. The first inlet of the first flow path is connected to the outdoor refrigerant outlet through the first pipeline. The first inlet is located on the windward side of the first fin and close to the second fin. An expansion valve is provided on the first pipeline. The second pipeline structure includes eight second U-shaped tubes, which are evenly distributed to form two second flow paths. Two second U-shaped tubes in one second flow path adjacent to the first fin are distributed at the second end of the first fin near the second fin. The four second U-shaped tubes in the other second flow path are distributed at the end of the second fin away from the first fin. The first outlet of the first flow path is connected to the second inlet of the two second flow paths. The first outlet is located on the leeward side of the first fin and is set close to the second fin. The second outlets of the two second flow paths merge and connect to the first end of the second pipeline. A solenoid valve is provided on the second pipeline. The third pipeline structure includes multiple third U-shaped tubes, which are distributed on the third fin and evenly divided to form two third flow paths. The second end of the second pipeline is connected to the third inlet of the two third flow paths, and the third outlet of the two third flow paths merges and connects to the third pipeline for connection with the outdoor refrigerant inlet.

2. The evaporator according to claim 1, characterized in that: The two third inlets are located on the windward side of the third fin and close to the second fin, and the two third outlets are located on the leeward side of the third fin and away from the second fin; The second pipeline includes a first pipe section and a second pipe section. The first pipe section connects the first port of the solenoid valve and the two second outlets. The second port of the solenoid valve is connected to the first end of the second pipe section. The second pipe section is U-shaped, and the second end of the second pipe section is provided with a first diversion port and a second diversion port. The first diversion port is located near the outer periphery of the second pipe section away from its open end, and the first diversion port is connected to a third inlet away from the second fin through a fourth pipe. The second diversion port is located near the open end of the second pipe section, and the second diversion port is connected to another third inlet near the second fin through a fifth pipe.

3. The evaporator according to claim 2, characterized in that: The number of the third U-shaped tubes is six.

4. The evaporator according to claim 1, characterized in that: The two second inlets are located on the windward side of the second fin and in the middle of the second pipeline structure; And / or, the two second outlets are located on the leeward side of the second fin and in the middle of the second duct structure.

5. The evaporator according to claim 1, characterized in that: The first included angle between the leeward side of the first fin and the leeward side of the second fin is an obtuse angle; And / or, the second included angle between the leeward side of the second fin and the leeward side of the third fin is an acute angle.

6. The evaporator according to claim 5, characterized in that: The first fin is located below the second fin in the vertical direction, and the first fin is located below the third fin in the vertical direction.

7. The evaporator according to claim 6, characterized in that: The first fin extends in a vertical direction.

8. The evaporator according to claim 1, characterized in that: A temperature sensing bulb is provided at one end of the third pipeline structure near the second fin.

9. The evaporator according to any one of claims 1 to 8, characterized in that: A filter is also installed on the first pipeline.

10. An air conditioning system, including an evaporator, characterized in that: The evaporator is the evaporator according to any one of claims 1 to 9.

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