EP4715287A1

EP4715287A1 - Evaporator

Info

Publication number: EP4715287A1
Application number: EP24814248.1A
Authority: EP
Inventors: Jianping PENG; Zhongqing ZHOU; Xiening QIU; Lu MEI
Original assignee: Tyco Fire and Security GmbH; York Guangzhou Air Conditioning and Refrigeration Co Ltd
Current assignee: Tyco Fire and Security GmbH; York Guangzhou Air Conditioning and Refrigeration Co Ltd
Priority date: 2023-05-26
Filing date: 2024-05-21
Publication date: 2026-03-25
Also published as: KR20260015292A; CN116697640B; CN116697640A; WO2024245049A1

Abstract

The present application discloses an evaporator, comprising a distribution device. The distribution device comprises a distribution device housing, at least one receiving opening, and at least one distribution member. The distribution device housing is arranged around heat exchange tubes and seals the ends of the heat exchange tubes. The at least one distribution member is rotatably connected to the distribution device housing, and the distribution member is configured to distribute a refrigerant received from the corresponding receiving opening to the ends of at least some of the heat exchange tubes as the distribution member rotates. In the distribution device of the evaporator of the present application, the distribution member rotates to uniformly distribute the refrigerant into the heat exchange tubes, ensuring the heat exchange efficiency of the heat exchange tubes. Under the condition of the same heat exchange efficiency, the number of heat exchange tubes in the evaporator of the present application can be reduced, thereby reducing the size of an evaporator housing, and reducing costs. In addition, under the condition that the sizes of evaporator housings are the same, more heat exchange tubes can be arranged on the evaporator of the present application, improving the heat exchange efficiency.

Description

Technical Field

The present application relates to an evaporator, in particular to a dry evaporator.

Background Art

Evaporators are key components in a refrigeration system, and dry evaporators are a common type of evaporators. A plurality of heat exchange tubes are arranged in a dry evaporator, wherein a refrigerant flows inside the heat exchange tubes and water flows outside the heat exchange tubes, so that the refrigerant inside the heat exchange tubes and the water outside the heat exchange tubes can perform heat exchange in an evaporator housing. During a heat exchange process, the refrigerant inside the heat exchange tubes absorbs heat of the water outside the heat exchange tubes to evaporate, thereby realizing a heat exchange function of the evaporator. It can be seen that uniform distribution of the refrigerant in the heat exchange tubes can effectively ensure the heat exchange efficiency of the dry evaporator. However, due to a large quantity of heat exchange tubes in the dry evaporator, it is difficult to distribute the refrigerant evenly to each heat exchange tube. Therefore, there is a need to provide an evaporator that can achieve uniform distribution of the refrigerant among the plurality of heat exchange tubes in the evaporator.

Summary of the Invention

The present application provides an evaporator, including: an evaporator housing, a pair of tube plates, a plurality of heat exchange tubes, and a distribution device. The distribution device includes a distribution device housing, at least one receiving opening, and at least one distribution member. The evaporator housing has a length direction. The pair of tube plates are respectively connected to two ends of the evaporator housing in the length direction. The plurality of heat exchange tubes are arranged in the evaporator housing and extend along the length direction of the evaporator housing, and an end of each heat exchange tube passes through the pair of tube plates. The distribution device is connected to one of the pair of tube plates and is configured to distribute a refrigerant to at least some of the heat exchange tubes in the plurality of heat exchange tubes. There is an accommodation space in the distribution device housing, and the distribution device housing is arranged around the heat exchange tubes and seals the ends of the heat exchange tubes. The at least one receiving opening is arranged on the distribution device housing, and the receiving opening is used for receiving a refrigerant. Each distribution member is in fluid communication with one corresponding receiving opening, and the at least one distribution member is arranged in the accommodation space and is rotatably connected to the distribution device housing, wherein the distribution member is configured to distribute the refrigerant received from the corresponding receiving opening to the ends of at least some of the heat exchange tubes as the distribution member rotates.
According to the above content, each distribution member includes a distribution cavity and a plurality of distribution openings in communication with the distribution cavity, and the distribution cavity of each distribution member is in communication with one corresponding receiving opening, wherein the plurality of distribution openings are arranged on a bottom wall of the distribution member that is toward the heat exchange tubes.
According to the above content, the distribution device further includes at least one connecting tube. Each connecting tube is in fluid communication with one of the distribution members and the corresponding receiving opening, such that the refrigerant received from the corresponding receiving opening can flow through the connecting tube and then enter the distribution member, wherein the connecting tube is arranged to rotate jointly with the distribution member.
According to the above content, the distribution device further includes at least one bearing. The at least one bearing is arranged between the connecting tube and the distribution device housing.
According to the above content, the bearing includes an inner ring, an outer ring, and a rolling element arranged between the inner ring and the outer ring, wherein the outer ring is connected to the distribution device housing, and the inner ring is connected to the connecting tube, such that the bearing facilitates rotation of the connecting tube relative to the distribution device housing.
According to the above content, the distribution device housing includes a mounting groove, and the bearing is accommodated in the mounting groove. The distribution device further includes a baffle, and the baffle is connected to the distribution device housing to retain the bearing in the mounting groove.
According to the above content, each distribution device includes a guide plate, the guide plate is arranged inside the connecting tube, and the guide plate is arranged to extend along a spiral shape to guide a flow direction of the refrigerant when the refrigerant flows through the guide plate, thereby generating a driving force driving rotation of the connecting tube.
According to the above content, the distribution device housing includes an annular enclosure plate and an end plate that are connected. The annular enclosure plate and the end plate jointly define the accommodation space, wherein the at least one distribution member is rotatably connected to an inner wall of the end plate, the at least one receiving opening is arranged in a manner of penetrating through the end plate, and the annular enclosure plate is connected between the tube plate and the end plate. Each distribution member includes at least one air jet hole, the at least one air jet hole is arranged on a side wall of the distribution member that is toward the annular enclosure plate, the air jet hole is arranged to guide gas in the refrigerant to be jetted toward the annular enclosure plate to generate a driving force driving rotation of the distribution member.
According to the above content, the distribution member is in a long tubular shape, the at least one air jet hole includes a pair of air jet holes, and the pair of air jet holes are respectively arranged on a pair of side walls of the distribution member and are respectively located at two ends of the distribution member in the length direction.
According to the above content, the distribution device housing includes an annular enclosure plate and an end plate that are connected. The annular enclosure plate and the end plate jointly define the accommodation space, wherein the at least one distribution member is rotatably connected to an inner wall of the end plate, the at least one receiving opening is arranged in a manner of penetrating through the end plate, and the annular enclosure plate is connected between the tube plate and the end plate. The bottom wall of the distribution member is in an arc shape, the plurality of distribution openings are respectively arranged on two opposite sides of the bottom wall, and the distribution openings are arranged to guide at least some of the refrigerant to be jetted toward the annular enclosure plate to generate a driving force driving rotation of the distribution member.
According to the above content, the distribution member further includes a drive motor, and an outer surface of the connecting tube is provided with teeth meshed with the drive motor, wherein the drive motor is arranged to provide a driving force driving rotation of the connecting tube.
According to the above content, the distribution member is in a long tubular shape, and each connecting tube is connected to a middle part of the distribution member, wherein the distribution member rotates with the connecting tube as a rotation shaft.
According to the above content, in the length direction of the distribution member, a size of the distribution member gradually decreases from the middle part to two ends.
According to the above content, each distribution member further includes a plurality of blocking members. The blocking members are arranged in the distribution cavity at an interval along the length direction of the distribution member.

Brief Description of the Drawings

FIG. 1A is a stereoscopic structure diagram of one embodiment of an evaporator according to the present application;
FIG. 1B is a partially exploded view of the evaporator in FIG. 1A;
FIG. 2A is a stereoscopic structure diagram of a distribution device in FIG. 1A;
FIG. 2B is a matching structure diagram of a distribution member and a tube plate shown in FIG. 2A;
FIG. 3A is an exploded view of the distribution device shown in FIG. 2A at one angle;
FIG. 3B is an exploded view of the distribution device shown in FIG. 2A at another angle;
FIG. 3C is a cross-sectional view of the distribution device shown in FIG. 2A;
FIG. 4A is a stereoscopic structure diagram of one embodiment of a distribution member shown in FIG. 3A at one angle;
FIG. 4B is a stereoscopic structure diagram of the distribution member shown in FIG. 4A at another angle;
FIG. 4C is a matching structure diagram of the distribution member and a distribution device housing shown in FIG. 4A;
FIG. 5A is a stereoscopic structure diagram of another embodiment of a distribution member shown in FIG. 3A;
FIG. 5B is a matching structure diagram of the distribution member and a distribution device housing shown in FIG. 5A;
FIG. 6A is a stereoscopic structure diagram of the distribution member shown in FIG. 4A at still another angle;
FIG. 6B is a top view of the distribution member shown in FIG. 6A;
FIG. 7A is an exploded view of still another embodiment of the distribution device shown in FIG. 2A;
FIG. 7B is a matching structure diagram of a distribution member and a tube plate shown in FIG. 7A;
FIG. 8 is an exploded view of still another embodiment of the distribution device shown in FIG. 2A; and
FIG. 9 is an exploded view of still another embodiment of the distribution device shown in FIG. 2A.

Detailed Description of Embodiments

Various specific implementations of the present application will be described below with reference to the accompanying drawings, which constitute a part of the specification. It should be understood that although terms that represent directions, such as "front", "rear", "upper", "lower", "left", "right", "top" and "bottom" are used in the present application to describe various example structural parts and elements of the present application, these terms used herein are determined based on example orientations shown in the accompanying drawings for ease of illustration only. Since embodiments disclosed in the present application may be arranged in different directions, these terms that represent directions are for illustration only and should not be regarded as limiting.
FIG. 1A and FIG. 1B show structures of an evaporator 100 according to an embodiment of the present application, wherein FIG. 1A shows a stereoscopic structure diagram of the evaporator 100, and FIG. 1B shows a partially exploded view of a distribution device 104 after being separated from a tube plate 103 of the evaporator 100. As shown in FIG. 1A and FIG. 1B, the evaporator 100 includes an evaporator housing 101, a plurality of heat exchange tubes 110, a pair of tube plates 103, and a distribution device 104. The evaporator housing 101 is cylindrical, and the cylindrical evaporator housing 101 extends in a horizontal direction. An accommodation space is formed inside the evaporator housing 101, and openings are formed at two ends of the evaporator housing 101 in the length direction. The pair of tube plates 103 are in a plate shape and are respectively arranged at the two ends of the evaporator housing 101 in the length direction. The pair of tube plates 103 are the same in shape, are parallel to each other, and are respectively arranged perpendicular to the length direction of the evaporator housing 101. Sizes of the pair of tube plates 103 are respectively larger than sizes of the openings of the evaporator housing 101 at the corresponding ends of the pair of tube plates, so that the pair of tube plates 103 can respectively seal the openings at the two ends of the evaporator housing 101 in the length direction.
The plurality of heat exchange tubes 110 are arranged in the accommodation space inside the evaporator housing 101, and a length direction of the plurality of heat exchange tubes 110 is consistent with the length direction of the evaporator housing 101. A pair of end parts of each heat exchange tube 110 penetrate through one tube plate 103. The distribution device 104 is located at one end of the evaporator housing 101 in the length direction and is connected to the outside of the corresponding tube plate 103. The distribution device 104 distributes a refrigerant (for example, a gas-liquid two-phase refrigerant) from an expansion valve to end parts of at least some of the heat exchange tubes 110 in the plurality of heat exchange tubes 110, such that the refrigerant can enter the heat exchange tubes 110. A refrigerant output tube 102 is arranged on the tube plate 103 on the other side relative to the distribution device 104. The refrigerant output tube 102 can be in communication with the heat exchange tubes 110 in the evaporator housing 101, so that the refrigerant in the heat exchange tubes 110 is discharged through the refrigerant output tube 102.
In this embodiment, the distribution device 104 includes a receiving opening 105, a distribution device housing 106, and a distribution member 220 (as shown in FIG. 2A). The receiving opening 105 is arranged on the distribution device housing 106, and the receiving opening 105 is connected to the expansion valve through a receiving tube 115 to receive the refrigerant. In addition, the receiving opening 105 is in fluid communication with the distribution member 220 inside the distribution device housing 106, such that the refrigerant can be distributed to the corresponding heat exchange tube 110 through the distribution member 220 after entering from the receiving opening 105. The distribution device 104 includes one receiving opening 105 in this embodiment, and may also include other quantities (for example, two and three) of receiving openings 105 in other embodiments. The distribution device housing 106 includes an end plate 109 and an annular enclosure plate 108, and the annular enclosure plate 108 is connected between the end plate 109 and the tube plate 103. The receiving opening 105 is arranged on the end plate 109. In this embodiment, the distribution device 104 further includes a fastener 107, and the fastener 107 is used for connecting the end plate 109 of the distribution device housing 106 and the tube plate 103, such that the distribution device 104 can be fixedly connected to the tube plate 103. In this embodiment, the fastener 107 is arranged as a circle around a peripheral edge of the distribution device housing 106, and a fastening clip 107 is located on the outside of the annular enclosure plate 108. In other embodiments, the distribution device 104 may also be fixedly connected to the tube plate 103 through other connection methods such as welding. The distribution device 104 further includes a seal 181, and the seal 181 is arranged between the annular enclosure plate 108 and the tube plate 103. The seal 181 is made of an elastic material and is used for sealed connection of the distribution device housing 106 and the tube plate 103. In this embodiment, the seal 181 is arranged as a circle that matches a shape of the annular enclosure plate 108 of the distribution device housing 106.
A water inlet 111 and a water outlet 112 are provided on a side face of the evaporator housing 101. The water inlet 111 and the water outlet 112 are each in communication with the accommodation space in the evaporator housing 101, such that water can flow into the interior of the evaporator housing 101 from the water inlet 111, and flow out from the water outlet 112 after performing heat exchange with the refrigerant in the heat exchange tubes 110. The evaporator 100 of this embodiment includes two water inlets 111 and one water outlet 112. As shown in FIG. 1A, the two water inlets 111 are respectively arranged at two opposite ends of the evaporator housing 101 in the length direction, and the water outlet 112 is arranged at a middle position of the evaporator housing 101 in the length direction. In other embodiments, the evaporator 100 may also include one water inlet and one water outlet, or other quantities of water inlets and water outlets.
The pair of tube plates 103, the evaporator housing 101, and tube walls of the plurality of heat exchange tubes 110 jointly define a flowing space for water, and the water flows between the inside of the evaporator housing 101 and the outsides of the plurality of heat exchange tubes 110. However, the refrigerant flows inside the plurality of heat exchange tubes 110. Therefore, the refrigerant flowing inside the heat exchange tubes 110 can exchange heat with the water flowing outside through the tube walls of the heat exchange tubes 110. In the evaporator 100, the water releases heat to lower the temperature, and a gas-liquid two-phase refrigerant absorbs heat to be further vaporized into a gaseous refrigerant.
FIG. 2A and FIG. 2B further illustrate structures of the distribution device 104 to illustrate a working principle of the distribution device 104. FIG. 2A shows a stereoscopic structure diagram of the distribution device 104 when viewed from the inside to the outside, and FIG. 2B shows a matching structure of the distribution member 220 of the distribution device 104, the tube plate 103, and the heat exchange tube 110 when viewed from the outside to the inside. As shown in FIG. 2A and FIG. 2B, the end plate 109 of the distribution device housing 106 is in a circular plate shape, and the annular enclosure plate 108 is in an annular plate shape. The annular enclosure plate 108 and the end plate 109 jointly define a cylindrical accommodation space 218 inside the distribution device housing 106.
The distribution member 220 is in a long straight tubular shape with both ends sealed, and has a top wall 223, a bottom wall 221, and a pair of side walls 222, which jointly define a distribution cavity inside the distribution member 220 (as shown in the distribution cavity 336 in FIG. 3C). Specifically, the top wall 223 and the bottom wall 221 are arranged oppositely, and the pair of side walls 222 are arranged oppositely. The top wall 223 is in a flat plate shape and is arranged close to the end plate 109, and the top wall 223 has a distribution member inlet 235 in fluid communication with the receiving opening 105, such that the distribution member 220 receives the refrigerant from the receiving opening 105 through the distribution member inlet 235. The bottom wall 221 is in an arc plate shape and is arranged close to the tube plate 103 and the heat exchange tubes 110, and the bottom wall 221 is provided with a plurality of distribution openings 216, such that the distribution member 220 distributes the refrigerant to each heat exchange tube 110 through the distribution openings 216. The distribution member inlet 235 and the plurality of distribution openings 216 are all in fluid communication with the distribution cavity 336, such that the refrigerant entering the distribution cavity 336 through the distribution member inlet 235 can be discharged through the plurality of distribution openings 216. In this embodiment, the plurality of distribution openings 216 are arranged along a straight line at the very bottom of the arc-shaped bottom wall 221, that is, at a part closest to the heat exchange tubes 110. In addition, the plurality of distribution openings 216 include 22 distribution openings 216 which are evenly divided into two groups and are arranged at two sides of the bottom wall 221 in the length direction at intervals. In other words, there is no distribution opening 216 on the bottom wall 221 at a position opposite to the distribution member inlet 235. This can prevent the refrigerant entering from the distribution member inlet 235 from flowing out directly from the distribution opening opposite to the distribution member inlet 235. In this embodiment, the distribution opening 216 is a round hole. In other embodiments, the distribution opening 216 may also be a square hole. Moreover, quantities, positions, and sizes of the distribution openings 216 can be set according to actual needs.
In this embodiment, the distribution member 220 is rotatably arranged in the accommodation space 218. The distribution member inlet 235 is provided in a middle part of the distribution member 220 in the length direction, and the distribution member 220 rotates around the distribution member inlet 235, such that rotation of the distribution member 220 is circular rotation. In this embodiment, the top and the bottom are located on two opposite sides in an axial direction of the distribution member 220. Those skilled in the art can understand that the distribution member 220 may rotate clockwise and may also rotate counterclockwise. Refer further to FIG. 2B. The distribution member 220 rotates clockwise in FIG. 2B. In this embodiment, the cylindrical accommodation space inside the evaporator housing 101 is full of the plurality of heat exchange tubes 110, in other words, the plurality of heat exchange tubes 110 are basically arranged in a circular range. In addition, in this embodiment, a length of the distribution member 220 is approximately the same as or slightly smaller than the circular range of the heat exchange tubes 110, such that a rotation path of the distribution member 220 can cover most of the heat exchange tubes 110. Since the refrigerant entering the distribution member 220 is in a gas-liquid two-phase mixed state, the refrigerant can have some jetting pressure. Therefore, even if the length of the distribution member 220 is slightly smaller than the circular range of the heat exchange tubes 110, the refrigerant can still be distributed to the heat exchange tubes at the edge under an action of a centrifugal force when the distribution member 220 rotates. Therefore, by setting the length of the distribution member 220 and the quantity of the distribution openings 216, the distribution member 220 can distribute the refrigerant from the receiving opening 105 to almost all the heat exchange tubes 110 through each distribution opening 216 during clockwise rotation.
Those skilled in the art can understand that, in this embodiment, the distribution device 104 includes one distribution member 220, and the length of the distribution member 220 is approximately the same as a diameter of the circular coverage range of the heat exchange tubes 110. As the distribution member 220 rotates, the refrigerant is distributed to almost all the heat exchange tubes 110. However, in other embodiments, the distribution device may also include more distribution members, or the distribution member may have other lengths, such that the refrigerant can be distributed to some of the plurality of heat exchange tubes on a rotation path of the distribution member as the distribution member rotates, which will be shown in other embodiments.
FIG. 3A to FIG. 3C illustrate a more specific structure of the distribution device 104. FIG. 3A shows an exploded stereoscopic view of the distribution device 104 from a perspective from the outside to the inside, FIG. 3B shows an exploded stereoscopic view of the distribution device 104 from a perspective from the inside to the outside, and FIG. 3C shows a cross-sectional view of the distribution device 104 after sectioning along a line A-A in FIG. 2A. As shown in FIG. 3A to FIG. 3C, the distribution device 104 further includes a connecting tube 325 and a bearing 328. The connecting tube 325 is in a straight cylinder shape, one end of the connecting tube is fixedly connected (for example, connected through welding) to the top wall 223 of the distribution member 220, and is arranged around the distribution member inlet 235. Therefore, the connecting tube 325 can be used as a rotation shaft to drive the distribution member 220 to perform circumferential rotation.
Another end of the connecting tube 325 is connected to the bearing 328 and is aligned with the receiving opening 105, such that the receiving opening 105 and the distribution member inlet 235 are in fluid communication through the connecting tube 325. Therefore, the refrigerant received from the receiving opening 105 can flow through the connecting tube 325 and then enter a distribution cavity 336 of the distribution member 220. In this embodiment, the distribution device 104 further includes a guide plate 326, and the guide plate 326 is arranged in the connecting tube 325 to guide a flow direction of the refrigerant when the refrigerant flows through the connecting tube 325. The guide plate 326 extends along a spiral shape in an extension direction of the connecting tube 325, such that when the gas-liquid two-phase refrigerant flows through the guide plate 326, a driving force driving rotation of the connecting tube 325 is generated. Under an action of the driving force, the connecting tube 325 drives the distribution member 220 to rotate jointly, for example, clockwise rotation is performed in FIG. 2B.
The bearing 328 is arranged between the connecting tube 325 and the end plate 109 of the distribution device housing 106 to assist in rotation of the connecting tube 325. Specifically, the bearing 328 includes an inner ring 342, an outer ring 341, and a rolling element 343 arranged between the inner ring 342 and the outer ring 341. The outer ring 341 is connected to the end plate 109 of the distribution device housing 106, and the inner ring 342 is connected to the connecting tube 325, such that the bearing 328 can facilitate rotation of the connecting tube 325 relative to the distribution device housing 106. In this embodiment, a mounting groove 332 is arranged inside the end plate 109, the bearing 328 is accommodated in the mounting groove 332, and the outer ring 341 of the bearing 328 is substantially flush with a surface of the end plate 109. In addition, the distribution device 104 further includes a baffle 327, and the baffle 327 blocks on the outside of the bearing 328. The baffle 327 is fixedly connected to the outer ring 341 of the bearing 328, and an outer edge of the baffle 327 is connected to the end plate 109 through a fastener, thereby fixedly connecting the outer ring 341 of the bearing 328 and the end plate 109. An end portion of the connecting tube 325 that is close to the outside and the inner ring 342 are fixedly connected, for example, are welded together. When the connecting tube 325 rotates, the outer ring 341 of the bearing 328 is fixedly connected to the end plate 109, so the outer ring 341 is fixed without movement. The inner ring 342 of the bearing 328 rotates together with the connecting tube 325. The rolling element 343 supports the inner ring 342 between the inner ring 342 and the outer ring 341, reduces a friction coefficient of rotation of the inner ring 342 and the connecting tube 325, and ensures the revolution accuracy of rotation of the inner ring 342 and the connecting tube 325, thereby assisting in rotation of the inner ring 342 and the connecting tube 325 relative to the outer ring 341. As one example, an end part of the connecting tube 325 is not in contact with the end plate 109, but is spaced apart from a bottom of the mounting groove 332 by a specific distance, to further reduce a frictional force of rotation of the connecting tube 325.
A plurality of blocking members 334 are arranged in the distribution cavity 336 of the distribution member 220, and the plurality of blocking members 334 are distributed at intervals along the length direction of the distribution member 220. In this embodiment, the blocking members 334 are connected inside the distribution member 220 through a welding process. In other embodiments, the blocking members 334 may also be assembled inside the distribution member 220 as molded parts. Since the refrigerant entering the distribution cavity 336 from the distribution member inlet 235 is in a gas-liquid two-phase mixed state with a certain pressure, arranging the blocking member 334 in the distribution cavity 336 can block flowing of the refrigerant and prevent a gaseous refrigerant with a relatively high flowing speed from directly driving a liquid refrigerant to be flushed to two ends of the distribution member 220 in the length direction. Therefore, it ensures that the liquid refrigerant can be evenly distributed in the length direction of the distribution member 220 as much as possible, and enter the heat exchange tubes 110 through each distribution opening 216 for evaporation. In this embodiment, the plurality of blocking members 334 are arranged oppositely and arranged at intervals on inner surfaces of the top wall 223 and the bottom wall 221 of the distribution member 220. In addition, each blocking member 334 extends perpendicularly to the length direction of the distribution member 220. As one specific example, each blocking member 334 arranged on the bottom wall 221 is located near the distribution opening 216, especially near the distribution opening 216 close to the distribution member inlet 235. Those skilled in the art can understand that sizes, quantities, and positions of the blocking members 334 can be set according to specific needs.
Therefore, when passing through the connecting tube 325 through the receiving opening 105, the gas-liquid two-phase refrigerant from the expansion valve can drive the connecting tube 325 and the distribution member 220 to rotate jointly, enter the distribution cavity 336 of the distribution member 220, and then flow along the length direction of the distribution member 220, and the refrigerant is distributed through each distribution opening 216 to each heat exchange tube 110 on the rotation path of the distribution member 220.
FIG. 4A to FIG. 4C show specific structures of another embodiment of a distribution member 420, wherein FIG. 4A and FIG. 4B are stereoscopic structure diagrams of the distribution member 420 from two angles, respectively, and FIG. 4C shows a matching structural diagram of the distribution member 420 and the annular enclosure plate 108. As shown in FIG. 4A to FIG. 4C, the shape and the structure of the distribution member 420 are basically the same as those of the distribution member 220, with a difference lying in that the distribution member 420 further includes at least one air jet hole 446. In this embodiment, the air jet hole 446 is arranged on a side wall 222 of the distribution member 220 and is arranged toward the annular enclosure plate 108 of the distribution device housing 106, for example, opposite to the annular enclosure plate 108, such that the air jet hole 446 can guide the gaseous refrigerant in the gas-liquid two-phase refrigerant to be jetted toward the annular enclosure plate 108 to generate a driving force driving rotation of the distribution member 220. In this embodiment, the air jet hole 446 and the guide plate 326 in the connecting tube 325 can be used together or can be used separately. When the air jet hole 446 and the guide plate 326 are used jointly, a direction of the driving force generated by the air jet hole 446 is consistent with a direction of the driving force generated by the refrigerant flowing through the guide plate 326 in the connecting tube 325, to jointly drive the distribution member 220 and the connecting tube 325 to rotate jointly. At the angle shown in FIG. 4C, the driving force enables the distribution member 220 to rotate counterclockwise, that is, at the angle shown in FIG. 2B, the driving force enables the distribution member 220 to rotate clockwise. As one example, in this embodiment, the quantity of the air jet holes 446 is two, the air jet holes are respectively arranged on a pair of side walls 222 of the distribution member 220, and the two air jet holes 446 are respectively arranged on the two ends of the distribution member 220 in the length direction on the pair of side walls 222. Therefore, the gaseous refrigerant jetted from the two air jet holes 446 impacts the annular enclosure plate 108, and directions of driving forces generated to drive rotation of the distribution member 220 are consistent.
FIG. 5A and FIG. 5B show specific structures of another embodiment of a distribution member 520, wherein FIG. 5A is a stereoscopic structure diagram of the distribution member 520, and FIG. 5B shows a matching structural view of the distribution member 520 and the annular enclosure plate 108. As shown in FIG. 5A and FIG. 5B, the shape and the structure of the distribution member 520 are basically the same as those of the distribution member 220, with a difference lying in that positions of a plurality of distribution openings 516 on the distribution member 520 are different from those of the distribution openings 216. In this embodiment, the plurality of distribution openings 516 are no longer arranged in a straight line on the bottom wall 221 of the distribution member 520. The plurality of distribution openings 516 are arranged in two groups, and are respectively offset from the very bottom of the bottom wall 221 toward two sides and are arranged on the bottom wall 221 close to the side wall 222. In other words, the two groups of distribution openings 516 are arranged on two sides of the arc-shaped bottom wall 221 in a staggered manner. Therefore, the distribution openings 516 are no longer arranged opposite to the heat exchange tubes 110, but are arranged toward the heat exchange tubes 110 but inclined to tube openings of the heat exchange tubes 110. When the refrigerant is discharged from the distribution openings 516, at least some of the refrigerant will be discharged toward the annular enclosure plate 108, thereby generating a driving force driving rotation of the distribution member 220. Compared with the air jet hole 446 of the distribution member 420, the distribution openings 516 still arranged on the bottom wall 221 are not opposite to the annular enclosure plate 108, but discharge a larger amount of refrigerant toward the annular enclosure plate 108, and therefore can also generate a driving force. Those skilled in the art will know that the distribution openings 516 in this embodiment can be used together with the guide plate 326 in the connecting tube 325 and the air jet hole 446 in the distribution member 420, or can be used alone. When used together, directions of driving forces generated by them are consistent.
FIG. 6A and FIG. 6B show specific structures of still another embodiment of a distribution member 620, wherein FIG. 6A is a stereoscopic structure diagram of the distribution member 620, and FIG. 6B shows a top view of the distribution member 620. As shown in FIG. 6A and FIG. 6B, the shape and the structure of the distribution member 620 are basically the same as those of the distribution member 220, with a difference lying in that a size of the distribution member 620 gradually decreases from the middle part to two ends in the length direction. In this embodiment, the distribution member 620 is no longer in a long tubular shape, but in a shape of a tube with two thin ends and a thick middle part. A pair of side walls 622 of the distribution member 620 extend relatively close to each other from the middle part to the two ends, such that the distribution member 620 forms the shape of the tube with two thin ends and a thick middle part. A top wall 623 and a bottom wall 621 of the distribution member 620 are still arranged opposite to each other and connected between the pair of side walls 622. The top wall 623 is in a flat plate shape, and the bottom wall 621 is in an arc shape. In addition, a connecting tube 625 is still connected to a middle part of the top wall 623.
In this embodiment, a refrigerant enters a distribution cavity inside the distribution member 620 from the connecting tube 625 at the middle part of the distribution member 620 and flows toward the two ends of the distribution member 620 along the length direction of the distribution member 620. As the refrigerant flows, part of the refrigerant is first discharged from the distribution openings to the heat exchange tubes. Therefore, the closer the refrigerant flows to both ends, the smaller the amount of the refrigerant. Setting the distribution member 620 in a shape with a gradually decreasing size from the middle part to the two ends can concentrate the refrigerant at the distribution openings and facilitate evenly distribution of the refrigerant within the distribution member 620. As one example, the distribution member 620 in this embodiment that has the shape of the tube with two thin ends and a thick middle part can be used in combination with other embodiments.
FIG. 7A and FIG. 7B show specific structures of a distribution device 704 of still another embodiment according to the present application. FIG. 7A shows a stereoscopic structure diagram of the distribution device 704, and FIG. 7B shows a matching structural diagram of a distribution member of the distribution device 704 and a tube plate 703. As shown in FIG. 7A and FIG. 7B, in this embodiment, the heat exchange tubes 710 include two heat exchange tube groups 710a and 710b that are symmetrically arranged left and right. There is an interval extending in a vertical direction between the heat exchange tube group 710a and the heat exchange tube group 710b. When an evaporator using the distribution device 704 of this embodiment is in a working state, the heat exchange tube group 710a and the heat exchange tube group 710b can operate at the same time or can operate independently. In other words, the evaporator can have three working states, wherein a first working state is that only the heat exchange tube group 710a operates, a second working state is that only the heat exchange tube group 710b operates, and a third working state is that the heat exchange tube group 710a and the heat exchange tube group 710b operate at the same time. The specific working states of the heat exchange tube group 710a and the heat exchange tube group 710b can be selected according to needs of a user.
A distribution device housing 706 of the distribution device 704 further includes a partition plate 782, and the partition plate 782 is connected inside an annular enclosure plate 708 and extends along the vertical direction. When the distribution device housing 706 is connected to the tube plate 703, the partition plate 782 is correspondingly connected to the interval between the heat exchange tube group 710a and the heat exchange tube group 710b to separate the accommodation space 718 into left and right parts corresponding to the heat exchange tube group 710a and the heat exchange tube group 710b, respectively. A seal 781 is used for sealed connection between the annular enclosure plate 708 and the tube plate 703. A size and a shape of the seal 781 match a cross section of an end of the distribution device housing 706 that is close to the tube plate 703. In this embodiment, the shape of the seal 781 is adapted to the annular enclosure plate 708 and the partition plate 782 arranged inside the annular enclosure plate 708. In other words, the seal 781 includes an annular portion and a strip portion that is connected into the annular portion and extends along the vertical direction.
The distribution device housing 706 of the distribution device 704 is provided with two receiving openings 705 that are symmetrically arranged left and right. Each receiving opening 705 independently receives a refrigerant through a receiving tube 715. Correspondingly, the distribution device 704 further includes two distribution members 720, each distribution member 720 is in fluid communication with one receiving opening 705 independently, and the two distribution members 720 are symmetrically arranged in left and right parts of the accommodation space 718 that are separated by the partition plate 782, respectively. Correspondingly, the distribution device 704 further includes two bearings 728, two baffles 727, and two connecting tubes 725. Each connecting tube 725 is in fluid communication with one distribution member 720 and one receiving opening 705. Each bearing 728 is arranged between one connecting tube 725 and the distribution device housing 706, and each baffle 727 connects one bearing 728 with the distribution device housing 706.
Refer further to FIG. 7B. The two distribution members 720 include a distribution member 720a and a distribution member 720b. The distribution member 720a and the distribution member 720b independently receive a refrigerant and distribute, through respective rotational movements, the refrigerant to the heat exchange tube group 710a and the heat exchange tube group 710b, respectively. In this embodiment, the heat exchange tube group 710a and the heat exchange tube group 710b are arranged in a semicircle. The distribution member 720a and the distribution member 720b are correspondingly arranged at a middle part of the heat exchange tube group 710a and a middle part of the heat exchange tube group 710b, respectively. When the distribution member 720a and the distribution member 720b perform circular rotation, the refrigerant can only be distributed to a heat exchange tube on a circumferential portion of rotation paths of the distribution member and the distribution member. In other words, the refrigerant cannot be distributed to some of the heat exchange tubes of the heat exchange tube group 710a and the heat exchange tube group 710b. Therefore, although the evaporator using the distribution device 704 of this embodiment can have more working states according to requirements of a unit, the heat exchange efficiency is lower than that of the evaporator using the distribution member 220.
FIG. 8 is a stereoscopic exploded view of a distribution device 804 according to still another embodiment of the present application. As shown in FIG. 8, in this embodiment, heat exchange tubes 810 include four heat exchange tube groups 810a, 810b, 810c and 810d. The heat exchange tube group 810a is arranged at an upper right part, the heat exchange tube group 810b is arranged at an upper left part, the heat exchange tube group 810c is arranged at a lower left part, and the heat exchange tube group 810d is arranged at a lower right part. In addition, the heat exchange tube group 810a and the heat exchange tube group 810d are separated from the heat exchange tube group 810b and the heat exchange tube group 810c by an interval extending along a vertical direction, and the heat exchange tube group 810a and the heat exchange tube group 810d are separated by an interval extending along a horizontal direction. There is no interval between the heat exchange tube group 810b and the heat exchange tube group 810c. By correspondingly arranging a tube plate structure at another end of an evaporator in a length direction, the heat exchange tube 810 can have four tube passes.
A distribution device housing 806 of the distribution device 804 further includes a partition plate 882, and the partition plate 882 is connected inside an annular enclosure plate 808 and includes a vertical plate 886 extending along the vertical direction and a transverse plate 887 extending along the horizontal direction. The horizontal plate 887 is formed by extending horizontally to the right from a middle part of the vertical plate 886. The vertical plate 886 is correspondingly connected to the vertically extending interval between the heat exchange tube group 810a and heat exchange tube group 810d and the heat exchange tube group 810b and heat exchange tube group 810c, and the horizontal plate 887 is correspondingly connected to the horizontally extending interval between the heat exchange tube group 810a and the heat exchange tube group 810d, to divide the accommodation space 818 into three parts corresponding to the heat exchange tube group 810a, corresponding to the heat exchange tube group 810d, and corresponding to the heat exchange tube group 810b and the heat exchange tube group 810c. A seal 881 is used for sealed connection between the annular enclosure plate 808 and the tube plate 803. In this embodiment, the seal 881 is in a circular ring shape.
The distribution device housing 806 of the distribution device 804 is provided with a receiving opening 805 and a refrigerant output port 883. The receiving opening 805 receives a refrigerant through a receiving tube 815, and the refrigerant output port 883 discharges the refrigerant through a refrigerant output tube 802. The receiving opening 805 is arranged above the refrigerant output port 883, the receiving opening 805 is arranged at a position corresponding to the heat exchange tube group 810a, and the refrigerant output port 883 is arranged at a position corresponding to the heat exchange tube group 810d. Corresponding to the receiving opening 805, the distribution device 804 further includes a distribution member 820, a bearing 828, a baffle 827, and a connecting tube 825 that are arranged in a portion in the accommodation space 818 that corresponds to the heat exchange tube group 810a. The connecting tube 825 is in fluid communication with the distribution member 820 and the receiving opening 805, the bearing 828 is between the connecting tube 825 and the distribution device housing 806, and the baffle 827 connects the bearing 828 with the distribution device housing 806.
When an evaporator using the distribution device 804 of this embodiment operates, a refrigerant enters the distribution member 820 from the receiving opening 805, and the refrigerant is distributed to an inlet end of the heat exchange tube group 810a (namely, one end at the tube plate 803 as shown in FIG. 8) through a rotational movement of the distribution member 820. Then, the refrigerant moves along a length direction of the heat exchange tube group 810a to an outlet end of the heat exchange tube group 810a (namely, one end at a tube plate at an upper portion in FIG. 1A), completing flowing in a first tube pass. Then, the refrigerant flows from the outlet end of the heat exchange tube group 810a to an inlet end of the heat exchange tube group 810b (namely, one end at the tube plate at the upper portion in FIG. 1A), and flows along a length direction in the heat exchange tube group 810b to an outlet end of the heat exchange tube group 810b (namely, one end at the tube plate 803 as shown in FIG. 8), completing flowing in a second tube pass. Then, the refrigerant flows from the outlet end of the heat exchange tube group 810b to an inlet end of the heat exchange tube group 810c (namely, one end at the tube plate 803 as shown in FIG. 8), and flows along the length direction in the heat exchange tube group 810c to an outlet end of the heat exchange tube group 810c (namely, one end at the tube plate at the upper portion in FIG. 1A), completing flowing in a third tube pass. Finally, the refrigerant flows from the outlet end of the heat exchange tube group 810c to an inlet end of the heat exchange tube group 810d (namely, one end at the tube plate at the upper portion in FIG. 1A), and flows along the length direction in the heat exchange tube group 810d to an outlet end of the heat exchange tube group 810d (namely, one end at the tube plate 803 as shown in FIG. 8). After completing flowing in a fourth tube pass, the refrigerant is discharged from the refrigerant output port 883 and the refrigerant output tube 802.
In this embodiment, the four heat exchange tube groups 810a, 810b, 810c and 810d are arranged in a quarter circle, that is, in a right-angle fan shape. The distribution member 820 is correspondingly arranged at a middle part of the heat exchange tube group 810a. When the distribution member 820 performs circular rotation, the refrigerant can only be distributed to heat exchange tubes on a circumferential portion of a rotation path of the distribution member. The refrigerant cannot be distributed to some of the heat exchange tubes of the heat exchange tube group 810a. Therefore, although an evaporator using the distribution device 804 of this embodiment can have more tube passes, the heat exchange efficiency is lower than that of the evaporator using the distribution member 220.
FIG. 9 is a stereoscopic exploded view of a distribution device 904 according to still another embodiment of the present application. As shown in FIG. 9, in this embodiment, a structure of the distribution device 904 is substantially the same as that of the distribution device 104, with a difference lying in a way of providing a driving force to the distribution member 220 and a connecting tube 925. In this embodiment, the distribution device 904 further includes a drive motor 963, and the drive motor 963 is used for drive rotation of the connecting tube 925. Specifically, an outer surface of the connecting tube 925 is provided with teeth 962, and the teeth 962 are arranged around the connecting tube 925. An end part of the drive motor 963 has teeth 964, and the teeth 964 are meshed with the teeth 962, such that the drive motor 963 can drive rotation of the connecting tube 925, thereby driving rotation of the distribution member 220. Those skilled in the art can understand that the drive motor 963 can also provide a driving force to the connecting tube 925 through transmission methods such as belts and chains.
Although some examples of distribution devices are given above, those skilled in the art can understand that quantities, positions, sizes, and the like of components such as distribution members, connecting tubes, and receiving openings in these examples can be set according to specific needs. Although some ways of providing a driving force to the distribution member and the connecting tube are shown above, those skilled in the art can also provide the driving force to the distribution member and the connecting tube in other ways, as long as the distribution member and the connecting tube are enabled to rotate jointly. In addition, these methods of providing the driving forces can be used alone or in combination, as long as the directions of driving forces provided are consistent.
In a dry evaporator, a refrigerant flows inside the heat exchange tubes and water flows outside the heat exchange tubes, so the refrigerant needs to be evenly distributed to each heat exchange tube. If the refrigerant is not evenly distributed into the heat exchange tubes, tube walls of some of heat exchange tubes cannot be fully utilized, thus affecting the heat exchange efficiency of the evaporator.
If a distribution device of the evaporator includes a distribution member that is fixed without movement, the refrigerant is distributed into the heat exchange tubes through the distribution member. In order to ensure that the refrigerant can be distributed to as many heat exchange tubes as possible, a plurality of distribution members need to be arranged to distribute the refrigerant to the heat exchange tubes in different areas. In addition, to ensure that the distribution member has a larger distribution range, a distribution opening of the distribution member further needs to be structurally designed, making a structure of the distribution member complicated.
In the distribution device of the evaporator of the present application, the distribution member rotates to uniformly distribute the refrigerant into the heat exchange tubes, ensuring the heat exchange efficiency of the heat exchange tubes. Moreover, the heat exchange tubes of the evaporator of the present application are arranged in a full circle shape, which not only fully utilizes a space in an evaporator housing, but also can further match a rotation path of the distribution member, such that as many heat exchange tubes as possible can be arranged in an evaporator of a specific size, and the refrigerant can be distributed to these heat exchange tubes. Therefore, under same heat exchange efficiency, the evaporator of the present application can reduce the quantity of heat exchange tubes, thereby reducing a size of the evaporator housing and reducing costs. In addition, under the condition that the sizes of evaporator housings are the same, more heat exchange tubes can be arranged on the evaporator of the present application, improving the heat exchange efficiency.
The distribution device of the present application can utilize gas-liquid two-phase mixing characteristics of the refrigerant to drive the distribution member to rotate, and can also drive the distribution member to rotate through an additional motor. A driving structure is simple, and installation and manufacturing are easy.
Moreover, in the distribution device of the present application, the distribution member first pre-distributes the refrigerant from an expansion valve in a distribution cavity, and then distributes the refrigerant to each heat exchange tube through a plurality of distribution openings. It not only ensures that a liquid refrigerant is evenly distributed to each heat exchange tube as much as possible, but also a pressure loss of the refrigerant is further reduced, so that the refrigerant discharged from the expansion valve does not need to have a high pressure, and the refrigerant can still be evenly distributed to each heat exchange tube, providing a wider range of working conditions for the design of a unit.
Although the present disclosure has been described in conjunction with the examples of the embodiments outlined above, various alternatives, modifications, variations, improvements and/or substantial equivalents, whether known or foreseeable now or soon, may become apparent to those of ordinary skill in the art. Accordingly, the examples of the embodiments of the present disclosure set forth above are intended to be illustrative rather than restrictive. Various changes may be made without departing from the spirit or scope of the present disclosure. Accordingly, the present disclosure is intended to embrace all known or earlier developed alternatives, modifications, variations, improvements and/or substantial equivalents. The technical effects and technical problems in the specification are exemplary rather than restrictive. It should be noted that the embodiments described in the specification may have other technical effects and may solve other technical problems.

Claims

An evaporator, comprising:
an evaporator housing (101), wherein the evaporator housing (101) has a length direction;

a pair of tube plates (103), wherein the pair of tube plates (103) are respectively connected to two ends of the evaporator housing (101) in the length direction;

a plurality of heat exchange tubes (110), wherein the plurality of heat exchange tubes (110) are arranged in the evaporator housing (101) and extend along the length direction of the evaporator housing (101), and an end of each heat exchange tube (110) passes through the pair of tube plates (103); and

a distribution device (104), wherein the distribution device (104) is connected to one of the pair of tube plates (103) and is configured to distribute a refrigerant to at least some of the heat exchange tubes (110) of the plurality of heat exchange tubes (110), wherein the distribution device (104) comprises:
a distribution device housing (106), wherein the distribution device housing (106) has an accommodation space (218) therein, and the distribution device housing (106) is arranged around the heat exchange tubes (110) and seals the ends of the heat exchange tubes (110);

at least one receiving opening (105), wherein the at least one receiving opening (105) is arranged on the distribution device housing (106), and the receiving opening (105) is used for receiving the refrigerant; and

at least one distribution member (220), wherein each distribution member (220) is in fluid communication with one corresponding receiving opening (105), and the at least one distribution member (220) is arranged in the accommodation space (218) and is rotatably connected to the distribution device housing (106), wherein the distribution member (220) is configured to distribute the refrigerant received from the corresponding receiving opening (105) to the ends of at least some of the heat exchange tubes (110) as the distribution member (220) rotates.
The evaporator according to claim 1, wherein
each distribution member (220) comprises a distribution cavity (336) and a plurality of distribution openings (216) in communication with the distribution cavity (336), and the distribution cavity (336) of each distribution member (220) is in communication with one corresponding receiving opening (105), wherein the plurality of distribution openings (216) are arranged on a bottom wall (221) of the distribution member (220) that is toward the heat exchange tubes (110).
The evaporator according to claim 2, wherein the distribution device (104) further comprises:
at least one connecting tube (325), each connecting tube (325) is in fluid communication with one of the distribution members (220) and the corresponding receiving opening (105), such that the refrigerant received from the corresponding receiving opening (105) can flow through the connecting tube (325) and then enter the distribution member (220), wherein the connecting tube (325) is arranged to rotate jointly with the distribution member (220).
The evaporator according to claim 3, wherein the distribution device (104) further comprises:
at least one bearing (328), wherein the at least one bearing (328) is arranged between the connecting tube (325) and the distribution device housing (106).
The evaporator according to claim 4, wherein
the bearing (328) comprises an inner ring (342), an outer ring (341), and a rolling element (343) arranged between the inner ring (342) and the outer ring (341), wherein the outer ring (341) is connected to the distribution device housing (106), and the inner ring (342) is connected to the connecting tube (325), such that the bearing (328) facilitates rotation of the connecting tube (325) relative to the distribution device housing (106).
The evaporator according to claim 4, wherein
the distribution device housing (106) comprises a mounting groove (332), and the bearing (328) is accommodated in the mounting groove (332),

wherein the distribution device (104) further comprises a baffle (327), and the baffle (327) is connected to the distribution device housing (106) to retain the bearing (328) in the mounting groove (332).
The evaporator according to claim 3, wherein
each distribution device (104) comprises a guide plate (326), the guide plate (326) is arranged inside the connecting tube (325), and the guide plate (326) is arranged to extend along a spiral shape to guide a flow direction of the refrigerant when the refrigerant flows through the guide plate (326), thereby generating a driving force driving rotation of the connecting tube (325).
The evaporator according to claim 3, wherein
the distribution device housing (106) comprises an annular enclosure plate (108) and an end plate (109) that are connected, and the annular enclosure plate (108) and the end plate (109) jointly define the accommodation space (218), wherein the at least one distribution member (220) is rotatably connected to an inner wall of the end plate (109), the at least one receiving opening (105) is arranged in a manner of penetrating through the end plate (109), and the annular enclosure plate (108) is connected between the tube plate (103) and the end plate (109),

wherein each distribution member (220) comprises at least one air jet hole (446), the at least one air jet hole (446) is arranged on a side wall (222) of the distribution member (220) that is toward the annular enclosure plate (108), and the air jet hole (446) is arranged to guide gas in the refrigerant to be jetted toward the annular enclosure plate (108) to generate a driving force driving rotation of the distribution member (220).
The evaporator according to claim 8, wherein
the distribution member (220) is in a long tubular shape, the at least one air jet hole (446) comprises a pair of air jet holes (446), and the pair of air jet holes (446) are respectively arranged on a pair of side walls (222) of the distribution member (220) and are respectively located at two ends of the distribution member (220) in the length direction.
The evaporator according to claim 3, wherein
the distribution device housing (106) comprises an annular enclosure plate (108) and an end plate (109) that are connected, and the annular enclosure plate (108) and the end plate (109) jointly define the accommodation space (218), wherein the at least one distribution member (220) is rotatably connected to an inner wall of the end plate (109), the at least one receiving opening (105) is arranged in a manner of penetrating through the end plate (109), and the annular enclosure plate (108) is connected between the tube plate (103) and the end plate (109),

wherein the bottom wall (221) of the distribution member (220) is in an arc shape, the plurality of distribution openings (216) are respectively arranged on two opposite sides of the bottom wall (221), and the distribution openings (216) are arranged to guide at least some of the refrigerant to be jetted toward the annular enclosure plate (108) to generate a driving force driving rotation of the distribution member (220).
The evaporator according to claim 3, wherein
the distribution member (220) further comprises a drive motor (963), and an outer surface of the connecting tube (925) is provided with teeth (962) meshed with the drive motor (963), wherein the drive motor (963) is arranged to provide a driving force driving rotation of the connecting tube (925).
The evaporator according to claim 3, wherein
the distribution member (220) is in a long tubular shape, and each connecting tube (325) is connected to a middle part of the distribution member (220), wherein the distribution member (220) rotates with the connecting tube (325) as a rotation shaft.
The evaporator according to claim 11, wherein
in the length direction of the distribution member (220), a size of the distribution member (220) gradually decreases from the middle part to two ends.
The evaporator according to claim 2, wherein
each distribution member (220) further comprises a plurality of blocking members (334), and the blocking members (334) are arranged in the distribution cavity (336) at an interval along the length direction of the distribution member (220).