Splitting device, control method thereof and heat exchange system

Abstract

The application provides a flow splitting device, a control method thereof and a heat exchange system. The flow splitting device comprises a shell and a rotating flow vane. The rotating flow vane can rotate around the axis of the inlet flow channel. The flow splitting device, the control method thereof and the heat exchange system provided by the application can form a spiral flow channel in the inlet flow channel by arranging the rotating flow vane, so that the centrifugal force is generated by the rotating movement of the refrigerant in the flow process. Under the action of the centrifugal force, the asymmetric refrigerant flow patterns such as stratified flow, slug flow and semi-annular flow carried in the refrigerant are corrected to annular flow with uniform circumferential distribution of liquid film, so that the flow rate, flow velocity and refrigerant flow pattern at the outlet of each flow splitting branch are basically the same, thereby ensuring the flow splitting effect of the refrigerant. In addition, the rotating flow vane can be rotated to further drive the rotating movement of the refrigerant, thereby further improving the flow splitting effect of the refrigerant.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flow splitting structure, in particular to a flow splitting device, a control method thereof and a heat exchange system. BACKGROUND

[0002] In a refrigeration system, the refrigerant flows into an evaporator in a gas-liquid two-phase state after passing through a throttling device. Whether the refrigerant can be uniformly and equally distributed to each branch of the evaporator has a crucial influence on the performance of the evaporator and even the entire refrigeration system. A flow splitter is an important auxiliary device used to uniformly distribute the gas-liquid two-phase refrigerant to each branch of the evaporator before the evaporator.

[0003] The type of flow splitter commonly used in the market is a Venturi flow splitter, the main principle of which is that the flow rate of the refrigerant increases after passing through a converging-diverging nozzle, and the gas-liquid two-phase mixture is uniformly mixed, thereby achieving the effect of uniform final distribution. However, it has a disadvantage: under alternating operating conditions, the flow of the refrigerant in the Venturi flow splitter often causes uneven mixing of the liquid and vapor, resulting in uneven final distribution, which seriously affects the heat exchange effect of the refrigeration system. SUMMARY

[0004] In order to solve the technical problem of uneven distribution of refrigerant in the prior art affecting the heat exchange effect, a flow splitting device is provided, which utilizes the centrifugal force generated by the rotation of the cyclone vane to straighten the flow of the refrigerant and improve the uniformity of the flow splitting, as well as a control method thereof and a heat exchange system.

[0005] A flow splitting device, comprising:

[0006] a housing, an inflow channel is formed in the housing, and at least two flow splitting branch outlets are provided on the housing, all of the flow splitting branch outlets being in communication with the inflow channel;

[0007] a cyclone vane, the cyclone vane being arranged in the inflow channel, and the cyclone vane and the inflow channel together defining a spiral flow passage, the axis of the spiral flow passage being collinear with the axis of the inflow channel;

[0008] The cyclone vane is capable of rotating about the axis of the inflow channel.

[0009] The cyclone vane reciprocally swings in the inflow channel at a set angle.

[0010] The flow splitting device further comprises a control structure capable of obtaining the flow rates of all the flow splitting branch outlets and controlling the swing angle of the cyclone vane according to the obtained flow rates.

[0011] The shunt device further comprises a driving mechanism arranged on the shell, the cyclone vane is connected to the driving mechanism, and the driving mechanism can drive the cyclone vane to rotate, and the driving mechanism is electrically connected with the control structure.

[0012] The driving mechanism has at least two working rotating speeds, and the control structure can control the rotating speed of the driving mechanism according to the obtained flow.

[0013] The driving mechanism has a first working rotating speed, a second working rotating speed and a third working rotating speed which are sequentially increased, the control structure can obtain an average flow A0 of all the shunt branch outlets and a flow An of each shunt branch outlet, and the number of the shunt branch outlets is N;

[0014] When the number of the shunt branch outlets corresponding to |An-A0|≥a is greater than N / 2, the driving mechanism works at the third working rotating speed;

[0015] When the number of the shunt branch outlets corresponding to |An-A0|≥a is between N / 3 and N / 2, the driving mechanism works at the second working rotating speed;

[0016] When the number of the shunt branch outlets corresponding to |An-A0|≥a is less than N / 3, the driving mechanism works at the first working rotating speed;

[0017] Wherein, a is a preset difference value.

[0018] The set angle of the cyclone vane has a first set angle, a second set angle and a third set angle which are sequentially increased, the control structure can obtain an average flow A0 of all the shunt branch outlets and a flow An of each shunt branch outlet, and the number of the shunt branch outlets is N;

[0019] When the number of the shunt branch outlets corresponding to |An-A0|≥a is greater than N / 2, the cyclone vane swings at the third set angle;

[0020] When the number of the shunt branch outlets corresponding to |An-A0|≥a is between N / 3 and N / 2, the cyclone vane swings at the second set angle;

[0021] When the number of the shunt branch outlets corresponding to |An-A0|≥a is less than N / 3, the cyclone vane swings at the first set angle;

[0022] Wherein, a is a preset difference value.

[0023] The angle range of the first set angle is 80° to 100°; and / or, the angle range of the second set angle is 170° to 190°; and / or, the angle range of the third set angle is 350° to 370°.

[0024] The shunt device further comprises a rectifier, which is arranged in the inflow channel and is located downstream of the cyclone vane.

[0025] The rectifier comprises a plate body, the outer wall of the plate body is in sealing fit with the inner wall of the inflow channel, and a plurality of flow holes are uniformly distributed on the plate body.

[0026] In the direction from the cyclone vane to the rectifier, the flow area of the inflow channel gradually decreases.

[0027] A control method of the shunt device, comprising:

[0028] Obtaining the flow An at the outlet of each shunt branch, and calculating the average flow A0 of all the shunt branch outlets, and comparing An and A0;

[0029] According to the comparison result of An and A0, the rotation angle and / or the rotation speed of the cyclone vane are controlled.

[0030] In the control of the rotation angle and / or the rotation speed of the cyclone vane according to the comparison result of An and A0, comprising:

[0031] When the number of the shunt branch outlets corresponding to |An-A0|≥a is greater than N / 2, the cyclone vane swings at a third rotation speed;

[0032] When the number of the shunt branch outlets corresponding to |An-A0|≥a is between N / 3 and N / 2, the cyclone vane swings at a second rotation speed;

[0033] When the number of the shunt branch outlets corresponding to |An-A0|≥a is less than N / 3, the cyclone vane swings at a first rotation speed;

[0034] Wherein, a is a preset difference; the first rotation speed < the second rotation speed < the third rotation speed.

[0035] In the control of the rotation angle and / or the rotation speed of the cyclone vane according to the comparison result of An and A0, comprising:

[0036] When the number of the shunt branch outlets corresponding to |An-A0|≥a is greater than N / 2, the cyclone vane swings at a third set angle;

[0037] When the number of the shunt branch outlets corresponding to |An-A0|≥a is between N / 3 and N / 2, the rotational flow vane swings at a second set angle;

[0038] When the number of the shunt branch outlets corresponding to |An-A0|≥a is less than N / 3, the rotational flow vane swings at a first set angle;

[0039] Wherein, a is a preset difference value; the first set angle < the second set angle < the third set angle.

[0040] A heat exchange system comprising the shunt device or applying the control method of the shunt device.

[0041] The shunt device and the control method thereof and the heat exchange system provided by the application, by arranging the rotational flow vane to form a spiral flow channel in the inflow channel, the centrifugal force is obtained by the rotating movement of the refrigerant in the flow process, under the action of the centrifugal force, the asymmetric refrigerant flow pattern such as stratified flow, slug flow and semi-annular flow carried in the refrigerant is rectified to annular flow with uniform circumferential distribution of liquid film, so that the flow rate, flow velocity and refrigerant flow pattern at each shunt branch outlet are basically the same, thereby ensuring the shunt effect of the refrigerant, and the rotational flow vane can further drive the rotating movement of the refrigerant by rotating, thereby further improving the shunt effect of the refrigerant, ensuring that the probability of the refrigerant in gas-liquid two-phase state flowing into each direct current branch connected with the shunt device is equal, so that the uniform shunt of the gas-liquid two-phase state refrigerant is realized in each branch of the heat exchanger, and the heat exchange efficiency of the heat exchange system is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0042] Fig. 1 The structure schematic view of the shunt device provided by the embodiment of the application;

[0043] Fig. 2 The structure schematic view of the rotational flow vane and the rectifier provided by the embodiment of the application;

[0044] Fig. 3 The control flow chart of the control method of the shunt device provided by the embodiment of the application;

[0045] In the figure:

[0046] 1, shell; 11, inflow channel; 12, shunt branch outlet; 2, rotational flow vane; 3, driving mechanism; 4, rectifier; 41, overflow hole. DETAILED DESCRIPTION

[0047] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present application and should not be used to limit the present application.

[0048] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present application and should not be used to limit the present application.

[0049] It should be noted that the terms "first", "second" and the like in the description of the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate or imply a specific order or sequence. It should be understood that the terms used in this way can be interchanged as appropriate, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0050] It should be noted that in the description of the present application, the terms "up", "down", "left", "right", "inner", "outer" and the like indicate the direction or positional relationship of the terms based on the direction or positional relationship shown in the drawings, which is merely for the purpose of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0051] In addition, it should be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In a refrigeration system, the refrigerant after throttling device, become gas-liquid two-phase state into the evaporator. Can the refrigerant evenly distributed to each branch of the evaporator, the performance of the evaporator and even the entire refrigeration system has a crucial impact. Distributor is an important auxiliary device, used in the evaporator, the gas-liquid two-phase refrigerant evenly distributed to each branch of the evaporator device. The current market commonly used type of distributor for venturi distributor, its main principle is: the refrigerant after the nozzle, the flow rate increases, gas-liquid two-phase mixture is uniform, so as to achieve the final uniform distribution effect. But it has a disadvantage: the flow of refrigerant in the venturi distributor under alternating operating conditions, often cause uneven mixing of liquid and vapor, so as to lead to the final distribution is uneven, seriously affect the heat transfer effect of refrigeration system.

[0053] Therefore, the present application provides a kind of as Figs. 1 to 3 The flow distribution device shown in the figure, comprising: the shell 1, the inflow passage 11 is formed in the shell 1, and at least two flow distribution branch outlets 12 are provided on the shell 1, all the flow distribution branch outlets 12 are communicated with the inflow passage 11;The cyclone vane 2 is arranged in the inflow passage 11, and the cyclone vane 2 and the inflow passage 11 jointly form a spiral flow channel, the axis of the spiral flow channel is collinear with the axis of the inflow passage 11;The cyclone vane 2 can rotate about the axis of the inflow passage 11. By arranging the cyclone vane 2 to form a spiral flow channel in the inflow passage 11, the refrigerant rotates during flow to obtain centrifugal force, under the action of centrifugal force, the refrigerant carried by the stratified flow, slug flow and semi-ring flow and other asymmetric refrigerant flow patterns are corrected to the circumferentially uniform distribution of ring flow, so that the flow rate, flow velocity and refrigerant flow pattern of the refrigerant flowing into each flow distribution branch outlet 12 are basically the same, thereby ensuring the flow distribution effect of the refrigerant, and the cyclone vane 2 can also rotate to further drive the rotational motion of the refrigerant, thereby further improving the flow distribution effect of the refrigerant, ensuring that the probability of the gas-liquid two-phase state refrigerant coming into contact with each direct current branch of the heat exchanger connected to the flow distribution device is equal, so that each branch of the heat exchanger realizes uniform distribution of the gas-liquid two-phase state refrigerant, and the heat exchange efficiency of the heat exchange system is ensured.

[0054] When the cyclone vane 2 rotates in a single direction in the inflow passage 11 all the time, the centrifugal force generated by the refrigerant is too large, which may cause the refrigerant to be separated into gas and liquid under the action of the centrifugal force. Most of the refrigerant in the outer ring flow is liquid, while most of the refrigerant in the inner ring flow is gas. At this time, the uniform distribution of the refrigerant cannot be achieved. Therefore, the cyclone vane 2 reciprocates in the inflow passage 11 at a set angle. By reciprocating, the generation of the centrifugal force can be ensured, and the centrifugal force can be prevented from being too large. Meanwhile, the reverse reciprocation of the cyclone vane 2 can reduce the flow rate of the annular flow and improve the mixing effect of the gas-liquid two-phase state, thereby improving the distribution effect of the distribution device.

[0055] In order to more accurately control the distribution effect of the distribution device, the distribution device further comprises a control structure. The control structure can obtain the flow rates of all the distribution branch outlets 12 and control the swing angle of the cyclone vane 2 according to the obtained flow rates. By adjusting the swing angle of the cyclone vane 2, the flow rate of each distribution branch outlet 12 is adjusted, so that the flow rates of all the distribution branch outlets 12 tend to be the same, thereby ensuring the distribution effect of the distribution device.

[0056] The distribution device further comprises a driving mechanism 3 arranged on the shell 1. The cyclone vane 2 is connected to the driving mechanism 3, and the driving mechanism 3 can drive the cyclone vane 2 to rotate. The driving mechanism 3 is electrically connected to the control structure. By adjusting the driving mechanism 3, the cyclone vane 2 can be adjusted reliably.

[0057] Preferably, the driving mechanism 3 is an electric motor. The electric motor controls the rotating speed by adjusting the sending frequency of the pulse. The higher the frequency is, the faster the rotating speed is. The rotating speed is the product of the sending frequency of the adjusting pulse and the step angle of the electric motor.

[0058] The driving mechanism 3 has at least two working rotating speeds, and the control structure can control the rotating speed of the driving mechanism 3 according to the obtained flow rates. By controlling the driving mechanism 3 to work at different working rotating speeds, the cyclone vane 2 swings at the same rotating speed, thereby adjusting the centrifugal force generated by the cyclone vane 2 and the frequency of the reciprocation, adjusting the flow rate of each distribution branch outlet 12, so that the flow rates of all the distribution branch outlets 12 tend to be the same, thereby ensuring the distribution effect of the distribution device.

[0059] Specifically, the driving mechanism 3 has a first working rotating speed, a second working rotating speed and a third working rotating speed that increase sequentially. The control structure can obtain the average flow rate A0 of all the distribution branch outlets 12 and the flow rate An of each distribution branch outlet 12. The number of the distribution branch outlets 12 is N.

[0060] When the number of the flow branch outlets 12 corresponding to |An-A0|≥a is greater than N / 2, it indicates that the flow distribution effect of the flow distribution device is poor at this time, and the driving mechanism 3 works at the third working speed to improve the flow distribution effect on the refrigerant by using a larger centrifugal force, thereby improving the flow distribution effect of the flow distribution device;

[0061] When the number of the flow branch outlets 12 corresponding to |An-A0|≥a is between N / 3 and N / 2, it indicates that the flow distribution effect of the flow distribution device is general at this time, and the driving mechanism 3 works at the second working speed to improve the flow distribution effect on the refrigerant by using a moderate centrifugal force, thereby improving the flow distribution effect of the flow distribution device;

[0062] When the number of the flow branch outlets 12 corresponding to |An-A0|≥a is less than N / 3, it indicates that the flow distribution effect of the flow distribution device is acceptable at this time, and the driving mechanism 3 works at the first working speed to assist the flow distribution on the refrigerant by using a smaller centrifugal force, thereby improving the flow distribution effect of the flow distribution device as much as possible;

[0063] Wherein, a is a preset difference value.

[0064] When |An-A0|≥a, it indicates that the flow of the flow branch outlet 12 corresponding to An is greatly different from the average flow, and this flow branch outlet 12 cannot uniformly distribute the flow, therefore, the flow distribution effect of the refrigerant needs to be adjusted, at this time, the number of the flow branch outlets 12 with a large difference from the average flow can be adjusted, thereby ensuring the final flow distribution effect of the flow distribution device.

[0065] When |An-A0|<a, it indicates that the flow of the flow branch outlet corresponding to An is not greatly different from the average flow, and it belongs to an acceptable range, and the heat exchanger connected with the flow distribution device can reliably obtain the refrigerant to ensure the heat exchange effect.

[0066] Further, the set angles of the swirl vanes 2 have a first set angle, a second set angle and a third set angle which are sequentially increased, the control structure can obtain the average flow A0 of all the flow branch outlets 12 and the flow An of each flow branch outlet 12, and the number of the flow branch outlets 12 is N;

[0067] When the number of the flow branch outlets 12 corresponding to |An-A0|≥a is greater than N / 2, the swirl vane 2 swings at the third set angle;

[0068] When the number of the flow branch outlets 12 corresponding to |An-A0|≥a is between N / 3 and N / 2, the swirl vane 2 swings at the second set angle;

[0069] When |An-A0|≥a corresponds to the number of the shunt branch outlet 12 is less than N / 3, the swirler vane 2 swings at the first set angle;

[0070] Wherein, a is a preset difference.

[0071] That is, the swing angle of the swirler vane 2 can be adjusted, and the centrifugal force of the refrigerant can also be adjusted.

[0072] Wherein, the speed of the motor is adjustable, and the sending frequency of the adjustment pulse received by the motor is also adjustable, so that the swing angle of the swirler vane 2 can be adjusted.

[0073] The angle range of the first set angle is 80° to 100°, and preferably, the first set angle is 90°, indicating that the refrigerant is basically evenly divided at this time, and only a certain degree of adjustment is needed by using centrifugal force.

[0074] The angle range of the second set angle is 170° to 190°, and preferably, the second set angle is 180°, indicating that the degree of refrigerant division at this time is general, and the centrifugal force needs to be increased for adjustment.

[0075] The angle range of the third set angle is 350° to 370°, and preferably, the third set angle, indicating that the degree of refrigerant division at this time is very poor, and the centrifugal force needs to be adjusted to the maximum to adjust the division of the refrigerant.

[0076] The shunt device further comprises a rectifier 4, the rectifier 4 is arranged in the inlet channel 11, and the rectifier 4 is located downstream of the swirler vane 2. The rectifier 4 further rectifies the annular flow generated by the swirler vane 2, further improving the shunt effect of the shunt device. Wherein, the rectifier 4 and the swirler vane 2 are integrally arranged, the rectifier 4 can rotate with the swirler vane 2, so that the rotation of the rectifier 4 can match the flow direction of the annular flow, improve the rectification effect of the rectifier 4 on the annular flow, and improve the shunt effect of the shunt device.

[0077] Specifically, the rectifier 4 comprises a plate body, the outer wall of the plate body is in sealing cooperation with the inner wall of the inlet channel 11, and a plurality of flow holes 41 are uniformly distributed on the plate body. At this time, the refrigerant can only flow through the flow holes 41, ensuring the rectification effect of the rectifier 4.

[0078] In the direction from the swirler vane 2 to the rectifier 4, the flow area of the inlet channel 11 gradually decreases, and the annular flow of the refrigerant is further strengthened by the gradually decreasing flow area, thereby improving the uniformity of the gas-liquid two-phase state of the refrigerant, improving the rectification effect of the rectifier 4 on the annular flow, and improving the shunt effect of the shunt device.

[0079] A control method of the above-mentioned flow splitting device, comprising:

[0080] Obtaining the flow rate An at each of the flow splitting branch outlets 12 and calculating the average flow rate A0 of all the flow splitting branch outlets 12, comparing An and A0;

[0081] According to the comparison result of An and A0, the rotating angle and / or rotating speed of the cyclone vane 2 is controlled, the spiral flow channel is formed in the inflow channel 11 by setting the cyclone vane 2, so that the centrifugal force is obtained by the rotating movement of the refrigerant in the flow process, under the action of the centrifugal force, the asymmetric refrigerant flow pattern such as stratified flow, slug flow and semi-annular flow carried by the refrigerant is rectified to annular flow with circumferentially uniform distribution of liquid film, so that the flow rate, flow speed and refrigerant flow pattern at each of the flow splitting branch outlets 12 are basically the same, thereby ensuring the flow splitting effect of the refrigerant.

[0082] Moreover, the cyclone vane 2 can further drive the rotating movement of the refrigerant, thereby further improving the flow splitting effect of the refrigerant, ensuring that the probability of the gas-liquid two-phase state refrigerant coming into contact with each of the straight flow branch circuits of the heat exchanger connected with the flow splitting device is equal, so that the uniform flow splitting of the gas-liquid two-phase state refrigerant is realized in each of the branch circuits of the heat exchanger, thereby ensuring the heat exchange efficiency of the heat exchange system.

[0083] Specifically, in the control of the rotating angle and / or rotating speed of the cyclone vane 2 according to the comparison result of An and A0, it comprises:

[0084] When the number of the flow splitting branch outlets 12 corresponding to |An-A0|≥a is greater than N / 2, it indicates that the flow splitting effect of the flow splitting device is poor at this time, the cyclone vane 2 swings at a third rotating speed, and the rectification effect of the refrigerant is improved by using a larger centrifugal force, thereby improving the flow splitting effect of the flow splitting device;

[0085] When the number of the flow splitting branch outlets 12 corresponding to |An-A0|≥a is between N / 3 and N / 2, it indicates that the flow splitting effect of the flow splitting device is general at this time, the cyclone vane 2 swings at a second rotating speed, and the rectification effect of the refrigerant is improved by using a moderate centrifugal force, thereby improving the flow splitting effect of the flow splitting device;

[0086] When the number of the flow splitting branch outlets 12 corresponding to |An-A0|≥a is less than N / 3, it indicates that the flow splitting effect of the flow splitting device is acceptable at this time, the cyclone vane 2 swings at a first rotating speed, and the rectification of the refrigerant is assisted by using a smaller centrifugal force, thereby increasing the flow splitting effect of the flow splitting device as much as possible;

[0087] Wherein, a is a preset difference value.

[0088] When |An-A0|≥a, it indicates that the flow of the outlet 12 of the branch corresponding to An is greatly different from the average flow, and the outlet 12 of the branch cannot perform uniform distribution, thus, the uniform distribution effect of the refrigerant needs to be adjusted, at this time, the adjustment can be performed according to the number of the outlets 12 of the branches whose flow is greatly different from the average flow, so as to ensure the final distribution effect of the distribution device.

[0089] When |An-A0|<a, it indicates that the flow of the outlet of the branch corresponding to An is not greatly different from the average flow, and belongs to the acceptable range, and the heat exchanger connected with the distribution device can reliably obtain the refrigerant to ensure the heat exchange effect.

[0090] The first rotating speed is matched with the first working rotating speed of the driving mechanism 3.

[0091] The second rotating speed is matched with the second working rotating speed of the driving mechanism 3.

[0092] The third rotating speed is matched with the third working rotating speed of the driving mechanism 3.

[0093] In the control of the rotating angle and / or rotating speed of the rotating vane 2 according to the comparison result of An and A0, the following is included:

[0094] When the number of the outlets 12 corresponding to |An-A0|≥a is greater than N / 2, the rotating vane 2 swings at a third set angle;

[0095] When the number of the outlets 12 corresponding to |An-A0|≥a is between N / 3 and N / 2, the rotating vane 2 swings at a second set angle;

[0096] When the number of the outlets 12 corresponding to |An-A0|≥a is less than N / 3, the rotating vane 2 swings at a first set angle;

[0097] Wherein, a is a preset difference value; the first set angle<the second set angle<the third set angle. That is, the adjustment of the centrifugal force of the refrigerant can also be realized by adjusting the swinging angle of the rotating vane 2.

[0098] Wherein, the rotating speed of the motor is adjustable, and the sending frequency of the adjustment pulse accepted by the motor is also adjustable, so as to realize the adjustment of the swinging angle of the rotating vane 2.

[0099] The angle range of the first set angle is 80° to 100°, and preferably, the first set angle is 90°, which indicates that the refrigerant is basically uniformly distributed, and only a certain degree of adjustment is needed by using the centrifugal force.

[0100] The angle range of the second set angle is 170° to 190°, and preferably, the second set angle is 180°, which indicates that the refrigerant distribution is general, and the centrifugal force needs to be increased for adjustment.

[0101] The angle range of the third set angle is 350° to 370°, and preferably, the third set angle, which indicates that the refrigerant distribution is very poor, and the centrifugal force needs to be adjusted to the maximum for adjustment of the refrigerant distribution.

[0102] A heat exchange system comprising the above-mentioned distribution device.

[0103] The above-mentioned embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, which belongs to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A diversion device, characterized in that: include: The housing (1) has an inflow channel (11) formed inside it, and at least two branch outlets (12) are provided on the housing (1), and all the branch outlets (12) are connected to the inflow channel (11); Swirl blade (2), the swirl blade (2) is disposed in the inlet channel (11), and the swirl blade (2) and the inlet channel (11) together form a spiral channel, the axis of the spiral channel is collinear with the axis of the inlet channel (11); The swirl blade (2) is capable of rotating about the axis of the inflow channel (11); The swirl blade (2) oscillates back and forth within the inlet channel (11) at a set angle. The oscillation of the swirl blade (2) means that the swirl blade (2) rotates forward and backward around its own axis. The diversion device also includes a control structure, which is capable of acquiring the flow rate of all the diversion branch outlets (12) and controlling the swing angle of the swirl blades (2) according to the acquired flow rate.

2. The diversion device according to claim 1, characterized in that: The diversion device also includes a drive mechanism (3), which is disposed on the housing (1). The swirling blade (2) is connected to the drive mechanism (3), and the drive mechanism (3) can drive the swirling blade (2) to rotate. The drive mechanism (3) is electrically connected to the control structure.

3. The diversion device according to claim 2, characterized in that: The drive mechanism (3) has at least two operating speeds, and the control structure can control the speed of the drive mechanism (3) according to the acquired flow rate.

4. The diversion device according to claim 3, characterized in that: The drive mechanism (3) has a first working speed, a second working speed and a third working speed that increase sequentially. The control structure is able to obtain the average flow rate A0 of all the branch outlets (12) and the flow rate An of each branch outlet (12). The number of branch outlets (12) is N. When the number of the branch outlets (12) corresponding to |An-A0|≥a is greater than N / 2, the drive mechanism (3) operates at the third working speed; When the number of the branch outlets (12) corresponding to |An-A0|≥a is between N / 3 and N / 2, the drive mechanism (3) operates at the second working speed; When the number of the branch outlets (12) corresponding to |An-A0|≥a is less than N / 3, the drive mechanism (3) operates at the first working speed; Where 'a' is the preset difference.

5. The diversion device according to claim 1, characterized in that: The swirl vane (2) has a first set angle, a second set angle and a third set angle that increase sequentially. The control structure can obtain the average flow rate A0 of all the branch outlets (12) and the flow rate An of each branch outlet (12). The number of branch outlets (12) is N. When the number of the branch outlets (12) corresponding to |An-A0|≥a is greater than N / 2, the swirl blades (2) swing at the third set angle; When the number of the branch outlets (12) corresponding to |An-A0|≥a is between N / 3 and N / 2, the swirl vanes (2) oscillate at the second set angle; When the number of the branch outlets (12) corresponding to |An-A0|≥a is less than N / 3, the swirl blades (2) swing at the first set angle; Where 'a' is the preset difference.

6. The diversion device according to claim 5, characterized in that: The first set angle has an angle range of 80° to 100°; and / or, the second set angle has an angle range of 170° to 190°; and / or, the third set angle has an angle range of 350° to 370°.

7. The diversion device according to claim 1, characterized in that: The flow splitting device also includes a rectifier (4), which is disposed in the inlet channel (11) and is located downstream of the swirl blade (2).

8. The diversion device according to claim 7, characterized in that: The rectifier (4) includes a plate body, the outer wall of the plate body is sealed to the inner wall of the inlet channel (11), and a plurality of flow holes (41) are evenly distributed on the plate body.

9. The diversion device according to claim 7, characterized in that: Along the direction from the swirl blade (2) to the rectifier (4), the flow area of ​​the inlet channel (11) gradually decreases.

10. A control method for a diversion device according to any one of claims 1 to 9, characterized in that: include: Obtain the flow rate An at all branch outlets (12) and calculate the average flow rate A0 at all branch outlets (12), and compare all An with A0; Based on the comparison results of An and A0, the rotation angle and / or rotation speed of the swirl blade (2) are controlled.

11. The control method according to claim 10, characterized in that: In controlling the rotation angle and / or rotational speed of the swirl vane (2) based on the comparison results of An and A0, the following are included: When the number of the branch outlets (12) corresponding to |An-A0|≥a is greater than N / 2, the swirl blades (2) oscillate at the third rotational speed; When the number of the branch outlets (12) corresponding to |An-A0|≥a is between N / 3 and N / 2, the swirl blades (2) oscillate at the second rotational speed; When the number of the branch outlets (12) corresponding to |An-A0|≥a is less than N / 3, the swirl blades (2) oscillate at the first rotational speed; Where 'a' is a preset difference; the first speed < the second speed < the third speed.

12. The control method according to claim 10, characterized in that: In controlling the rotation angle and / or rotational speed of the swirl vane (2) based on the comparison results of An and A0, the following are included: When the number of the branch outlets (12) corresponding to |An-A0|≥a is greater than N / 2, the swirl blades (2) swing at a third set angle; When the number of the branch outlets (12) corresponding to |An-A0|≥a is between N / 3 and N / 2, the swirl vanes (2) swing at a second set angle; When the number of the branch outlets (12) corresponding to |An-A0|≥a is less than N / 3, the swirl blades (2) swing at a first set angle; Where 'a' is the preset difference; the first preset angle < the second preset angle < the third preset angle.

13. A heat exchange system, characterized in that: The diversion device includes any one of claims 1 to 9, or the control method using any one of claims 10 to 12.

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