Flow dividing device, control method thereof and heat exchange system

Abstract

The invention provides a flow dividing device, a control method thereof and a heat exchange system. The shunting device comprises a shell; a swirl vane; the rotational flow blades can rotate with the axis of the inflow channel as the axis. According to the flow dividing device, the control method of the flow dividing device and the heat exchange system, the spiral flow channel is formed in the inflow channel by arranging the rotational flow blades, so that a refrigerant rotates in the circulation process to obtain centrifugal force, and under the action of the centrifugal force, the heat exchange efficiency is improved. Asymmetric refrigerant flow patterns such as stratified flow, slug flow and semi-annular flow carried in the refrigerant are rectified into annular flow with a liquid film uniformly distributed in the circumferential direction, so that the flow rate, the flow velocity and the refrigerant flow pattern flowing to outlets of all shunting branches are basically the same, and the shunting effect of the refrigerant is guaranteed; and the rotational flow blades can also rotate, so that the rotational movement of the refrigerant can be further driven, and the flow dividing effect on the refrigerant is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of flow diversion structures, in particular to a flow diversion device and a control method thereof, and a heat exchange system. Background Art

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

[0003] The type of flow divider commonly used in the market is the Venturi flow divider, whose main principle is: after the refrigerant passes through the contraction-expansion nozzle, the flow rate increases, and the gas-liquid two-phase mixes evenly, thereby achieving the final uniform distribution effect. However, it has a disadvantage: the flow of refrigerant in the Venturi flow divider under alternating operating conditions often causes uneven mixing of liquid and steam, resulting in uneven final distribution, which seriously affects the heat exchange effect of the refrigeration system. Summary of the invention

[0004] In order to solve the technical problem in the prior art that uneven refrigerant flow affects heat exchange effect, a flow diversion device and a control method and a heat exchange system are provided, which use the centrifugal force generated by the rotation of swirl blades to rectify the flow of refrigerant to improve the diversion uniformity.

[0005] A flow dividing device, comprising:

[0006] A shell, wherein an inlet channel is formed in the shell, and at least two branch outlets are provided on the shell, and all the branch outlets are communicated with the inlet channel;

[0007] A swirl blade, wherein the swirl blade is disposed in the inlet channel, and the swirl blade and the inlet channel together form a spiral flow channel, and the axis of the spiral flow channel is collinear with the axis of the inlet channel;

[0008] The swirl blades can rotate around the axis of the inlet channel.

[0009] The swirl blades reciprocate and swing at a set angle in the inlet channel.

[0010] The flow splitting device also includes a control structure, which can obtain the flow rates of all the flow splitting branch outlets and control the swing angle of the swirl blade according to the obtained flow rates.

[0011] The flow dividing device further comprises a driving mechanism, wherein the driving mechanism is arranged on the housing, the swirl blades are connected to the driving mechanism, and the driving mechanism can drive the swirl blades to rotate, and the driving mechanism is electrically connected to the control structure.

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

[0013] The driving mechanism has a first working speed, a second working speed and a third working speed which increase in sequence, and the control structure can obtain an average flow rate A0 of all the diversion branch outlets and a flow rate An of each diversion branch outlet, and the number of the diversion branch outlets is N;

[0014] When |An-A0|≥a, the number of the diversion branch outlets corresponding to the value is greater than N / 2, the driving mechanism operates at the third operating speed;

[0015] When |An-A0|≥a, the number of the diversion branch outlets corresponding to the value is between N / 3 and N / 2, the driving mechanism operates at the second operating speed;

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

[0017] Wherein, a is the preset difference.

[0018] The setting angle of the swirl blade has a first setting angle, a second setting angle and a third setting angle which increase in sequence, and the control structure can obtain the average flow rate A0 of all the branch outlets and the flow rate An of each branch outlet, and the number of the branch outlets is N;

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

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

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

[0022] Wherein, a is the preset difference.

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

[0024] The flow dividing device further comprises a rectifier, which is arranged in the inlet channel and located downstream of the swirl blade.

[0025] The rectifier comprises a plate body, the outer wall of the plate body is sealed with the inner wall of the inlet channel, and a plurality of flow holes are evenly distributed on the plate body.

[0026] Along the direction from the swirl blade to the rectifier, the flow area of ​​the inlet channel gradually decreases.

[0027] A control method for the above-mentioned flow diversion device includes:

[0028] Obtain the flow rate An at the outlets of all the branch branches, calculate the average flow rate A0 of all the branch branch outlets, and compare An with A0;

[0029] According to the comparison result of An and A0, the rotation angle and / or rotation speed of the swirl blade is controlled.

[0030] According to the comparison result of An and A0, controlling the rotation angle and / or the rotation speed of the swirl blade includes:

[0031] When the number of the diversion branch outlets corresponding to |An-A0|≥a is greater than N / 2, the swirl blades swing at a third speed;

[0032] When the number of the diversion branch outlets corresponding to |An-A0|≥a is between N / 3 and N / 2, the swirl blades swing at a second speed;

[0033] When |An-A0|≥a, the number of the diversion branch outlets corresponding to the diversion branch outlets is less than N / 3, the swirl blades swing at a first speed;

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

[0035] According to the comparison result of An and A0, controlling the rotation angle and / or the rotation speed of the swirl blade includes:

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

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

[0038] When |An-A0|≥a, the number of the diversion branch outlets corresponding to the diversion branch outlets is less than N / 3, the swirl blades swing at a first set angle;

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

[0040] A heat exchange system comprises the above-mentioned flow diversion device or a control method using the above-mentioned flow diversion device.

[0041] The diversion device and its control method and heat exchange system provided by the present invention form a spiral flow channel in the inlet channel by arranging swirl blades, so that the refrigerant performs a rotational motion during the circulation process to obtain centrifugal force. Under the action of centrifugal force, asymmetric refrigerant flow patterns such as stratified flow, segment flow and semi-annular flow carried in the refrigerant are rectified into annular flow with liquid film evenly distributed along the circumference, so that the flow rate, flow velocity and refrigerant flow pattern flowing to the outlets of each diversion branch are basically the same, thereby ensuring the diversion effect of the refrigerant, and the swirl blades can also rotate to further drive the rotational motion of the refrigerant, thereby further improving the diversion effect of the refrigerant, ensuring that each direct current branch of the heat exchanger connected to the diversion device has an equal probability of contacting the refrigerant flow in the gas-liquid two-phase state, so that each branch branch of the heat exchanger can achieve uniform diversion of the gas-liquid two-phase refrigerant, thereby ensuring the heat exchange efficiency of the heat exchange system. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of the structure of a flow diversion device provided in an embodiment of the present invention;

[0043] Figure 2 A schematic diagram of the structure of the swirl blade and rectifier provided in an embodiment of the present invention;

[0044] Figure 3 A control flow chart of a control method for a flow dividing device provided by an embodiment of the present invention;

[0045] In the figure:

[0046] 1. Shell; 11. Inlet channel; 12. Branch outlet; 2. Swirl blade; 3. Driving mechanism; 4. Rectifier; 41. Flow hole. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0050] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do 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 limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0051] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the refrigeration system, after the refrigerant passes through the throttling device, it changes into a gas-liquid two-phase state and flows into the evaporator. Whether the refrigerant can be evenly and equally distributed to each branch of the evaporator has a crucial impact on the performance of the evaporator and even the entire refrigeration system. The splitter is an important auxiliary device, which is used in front of the evaporator to evenly distribute the gas-liquid two-phase refrigerant to each branch of the evaporator. The type of splitter commonly used in the market is the Venturi splitter. Its main principle is: after the refrigerant passes through the contraction-expansion nozzle, the flow rate increases, and the gas-liquid two-phase mixes evenly, thereby achieving the final uniform distribution effect. However, it has a disadvantage: the flow of refrigerant in the Venturi splitter under alternating operating conditions often causes uneven mixing of liquid and steam, resulting in uneven final distribution, which seriously affects the heat exchange effect of the refrigeration system.

[0053] To this end, the present application provides a Figures 1 to 3 The diversion device shown includes: a shell 1, in which an inlet channel 11 is formed, and at least two diversion branch outlets 12 are arranged on the shell 1, and all of the diversion branch outlets 12 are connected to the inlet channel 11; a swirl blade 2, the swirl blade 2 is arranged in the inlet channel 11, and the swirl blade 2 and the inlet channel 11 together form a spiral flow channel, and the axis of the spiral flow channel is colinear with the axis of the inlet channel 11; the swirl blade 2 can rotate with the axis of the inlet channel 11 as the axis. By arranging the swirl blades 2 to form a spiral flow channel in the inlet channel 11, the refrigerant is caused to perform a rotational motion during the circulation process to obtain centrifugal force. Under the action of the centrifugal force, the asymmetric refrigerant flow patterns such as stratified flow, segment flow and semi-annular flow carried in the refrigerant are rectified into annular flow in which the liquid film is evenly distributed along the circumference, so that the flow rate, flow velocity and refrigerant flow pattern flowing to each branch outlet 12 are basically the same, thereby ensuring the refrigerant diversion effect, and the swirl blades 2 can also rotate to further drive the rotational motion of the refrigerant, thereby further improving the refrigerant diversion effect, ensuring that each direct current branch of the heat exchanger connected to the diversion device has an equal probability of contacting the refrigerant flow in the gas-liquid two-phase state, so that each branch of the heat exchanger can achieve uniform diversion of the gas-liquid two-phase refrigerant, thereby ensuring the heat exchange efficiency of the heat exchange system.

[0054] When the swirl blade 2 always rotates in a single direction in the inlet channel 11, the centrifugal force generated by the refrigerant is too large, which will cause the refrigerant to separate from the gas and liquid under the action of the centrifugal force. Most of the refrigerant in the outer ring circulation is liquid refrigerant, while most of the refrigerant in the inner ring circulation is gaseous refrigerant. At this time, the uniform diversion of the refrigerant cannot be achieved. For this reason, the swirl blade 2 reciprocates at a set angle in the inlet channel 11. The reciprocating swing can not only ensure the generation of centrifugal force, but also avoid excessive centrifugal force. At the same time, the reverse swing of the swirl blade 2 can reduce the flow rate of the annular flow, improve the mixing effect of the gas-liquid two-phase state, and thus improve the diversion effect of the diversion device.

[0055] In order to more accurately control the diversion effect of the diversion device, the diversion device also includes a control structure, which can obtain the flow rate of all the diversion branch outlets 12 and control the swing angle of the swirl blade 2 according to the obtained flow rate. By adjusting the swing angle of the swirl blade 2, the flow rate of each diversion branch outlet 12 is adjusted, so that the flow rates of all the diversion branch outlets 12 tend to be the same, thereby ensuring the diversion effect of the diversion device.

[0056] The flow dividing device further comprises a driving mechanism 3, which is arranged on the housing 1, the swirl blade 2 is connected to the driving mechanism 3, and the driving mechanism 3 can drive the swirl blade 2 to rotate, and the driving mechanism 3 is electrically connected to the control structure. The swirl blade 2 is adjusted by adjusting the driving mechanism 3, so that the adjustment of the swirl blade 2 is reliable.

[0057] Preferably, the driving mechanism 3 is a motor, and the motor controls the rotation speed by adjusting the pulse transmission frequency, and the higher the frequency, the faster the rotation speed. The rotation speed is the product of the pulse transmission frequency and the step angle of the motor.

[0058] The driving mechanism 3 has at least two working speeds, and the control structure can control the speed of the driving mechanism 3 according to the acquired flow rate. By controlling the driving mechanism 3 to work at different working speeds, the swirl blades 2 are also swung at the same speed, so that the ability of the swirl blades 2 to generate centrifugal force and the frequency of reciprocating swinging are adjusted, and the flow rate of each branch outlet 12 is adjusted, so that the flow rates of all branch outlets 12 tend to be the same, thereby ensuring the swirl effect of the swirl device.

[0059] Specifically, the driving mechanism 3 has a first working speed, a second working speed and a third working speed which increase in sequence, and the control structure can obtain an average flow rate A0 of all the branch outlets 12 and a flow rate An of each branch outlet 12, and the number of the branch outlets 12 is N;

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

[0061] When the number of the shunt branch outlets 12 corresponding to |An-A0|≥a is between N / 3 and N / 2, it indicates that the shunt effect of the shunt device is average at this time, and the driving mechanism 3 operates at the second working speed, using a medium centrifugal force to improve the rectification effect of the refrigerant, thereby improving the shunt effect of the shunt device;

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

[0063] Wherein, a is the preset difference.

[0064] When |An-A0|≥a, it indicates that the flow rate of the diverter branch outlet 12 corresponding to An is greatly different from the average flow rate, and this diverter branch outlet 12 cannot perform uniform diversion. Therefore, it is necessary to adjust the equal flow effect of the refrigerant. At this time, it can be adjusted according to the number of diverter branch outlets 12 whose flow rates are greatly different from the average flow rates, so as to ensure the final diversion effect of the diversion device.

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

[0066] Furthermore, the setting angle of the swirl blade 2 has a first setting angle, a second setting angle and a third setting angle which increase in sequence, and the control structure can obtain an average flow rate A0 of all the branch outlets 12 and a flow rate An of each branch outlet 12, and the number of the branch outlets 12 is N;

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

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

[0069] When |An-A0|≥a, the number of the branch outlets 12 corresponding to the flow distribution is less than N / 3, the swirl blade 2 swings at the first set angle;

[0070] Wherein, a is the preset difference.

[0071] That is, the centrifugal force of the refrigerant can be adjusted by adjusting the swing angle of the swirl blade 2 .

[0072] The rotation speed of the motor is adjustable, and the sending frequency of the regulating pulses received by the motor is also adjustable, so that the swing angle of the swirl blade 2 can be adjusted.

[0073] The first setting angle has an angle range of 80° to 100°. Preferably, the first setting angle is 90°, indicating that the refrigerant is basically evenly distributed at this time, and only a certain degree of adjustment needs to be made using centrifugal force.

[0074] The second setting angle has an angle range of 170° to 190°. Preferably, the second setting angle is 180°, indicating that the diversion degree of the refrigerant is normal at this time and the centrifugal force needs to be increased for adjustment.

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

[0076] The flow splitting device also includes a rectifier 4, which is arranged in the inlet channel 11, and the rectifier 4 is located downstream of the swirl blade 2. The rectifier 4 is used to further rectify the annular flow generated by the swirl blade 2, and further improve the flow splitting effect of the flow splitting device. The rectifier 4 is arranged integrally with the swirl blade 2, and the rectifier 4 can rotate together with the swirl blade 2, so that the rotation of the rectifier 4 can match the flow direction of the annular flow, thereby improving the rectifying effect of the rectifier 4 on the annular flow and improving the flow splitting effect of the flow splitting device.

[0077] Specifically, the rectifier 4 includes a plate body, the outer wall of the plate body is sealed with the inner wall of the inlet channel 11, and a plurality of flow holes 41 are evenly distributed on the plate body. At this time, the refrigerant can only flow through the flow holes 41 to ensure the rectification effect of the rectifier 4.

[0078] Along the direction from the swirl blade 2 to the rectifier 4, the flow area of ​​the inlet channel 11 gradually decreases. The gradual decrease in the flow area further strengthens the annular flow of the refrigerant, 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 diversion effect of the diversion device.

[0079] A control method for the above-mentioned flow diversion device includes:

[0080] Obtain the flow rate An at all the branch outlets 12, calculate the average flow rate A0 of all the branch outlets 12, and compare An with A0;

[0081] According to the comparison result of An and A0, the rotation angle and / or rotation speed of the swirl blade 2 is controlled, and the swirl blade 2 is arranged to form a spiral flow channel in the inlet channel 11, so that the refrigerant performs a rotational motion during the circulation process to obtain centrifugal force. 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 rectified into annular flow with the liquid film uniformly distributed along the circumference, so that the flow rate, flow velocity and refrigerant flow pattern flowing to each diversion branch outlet 12 are basically the same, thereby ensuring the diversion effect on the refrigerant.

[0082] Moreover, the swirl blades 2 can also rotate to further drive the rotational movement of the refrigerant, thereby further improving the diversion effect on the refrigerant, ensuring that each direct current branch of the heat exchanger connected to the diversion device has an equal probability of contacting the gas-liquid two-phase refrigerant flow, so that each branch of the heat exchanger can achieve uniform diversion of the gas-liquid two-phase refrigerant, thereby ensuring the heat exchange efficiency of the heat exchange system.

[0083] Specifically, according to the comparison result of An and A0, controlling the rotation angle and / or rotation speed of the swirl blade 2 includes:

[0084] When the number of the shunt branch outlets 12 corresponding to |An-A0|≥a is greater than N / 2, it indicates that the shunt effect of the shunt device is poor at this time, and the swirl blades 2 swing at the third speed, using a larger centrifugal force to improve the rectification effect of the refrigerant, thereby improving the shunt effect of the shunt device;

[0085] When the number of the diversion branch outlets 12 corresponding to |An-A0|≥a is between N / 3 and N / 2, it indicates that the diversion effect of the diversion device is average at this time, and the swirl blades 2 swing at the second speed, using the medium centrifugal force to improve the rectification effect of the refrigerant, thereby improving the diversion effect of the diversion device;

[0086] When |An-A0|≥a corresponds to a number of the diversion branch outlets 12 that is less than N / 3, it indicates that the diversion effect of the diversion device is acceptable at this time, and the swirl blades 2 swing at the first speed, using a smaller centrifugal force to assist in rectifying the refrigerant, thereby increasing the diversion effect of the diversion device as much as possible;

[0087] Wherein, a is the preset difference.

[0088] When |An-A0|≥a, it indicates that the flow rate of the diverter branch outlet 12 corresponding to An is greatly different from the average flow rate, and this diverter branch outlet 12 cannot perform uniform diversion. Therefore, it is necessary to adjust the equal flow effect of the refrigerant. At this time, it can be adjusted according to the number of diverter branch outlets 12 whose flow rates are greatly different from the average flow rates, so as to ensure the final diversion effect of the diversion device.

[0089] When |An-A0|<a, it indicates that the flow rate at the outlet of the diversion branch corresponding to An is not much different from the average flow rate and is within an acceptable range. The heat exchanger connected to the diversion device can reliably obtain the refrigerant to ensure the heat exchange effect.

[0090] Wherein, the first rotation speed matches the first working rotation speed of the driving mechanism 3;

[0091] The second rotation speed matches the second operating rotation speed of the driving mechanism 3;

[0092] The third rotation speed matches the third operating rotation speed of the driving mechanism 3 .

[0093] According to the comparison result of An and A0, controlling the rotation angle and / or the rotation speed of the swirl blade 2 includes:

[0094] 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;

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

[0096] 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;

[0097] Wherein, a is a preset difference; the first preset angle < the second preset angle < the third preset angle. That is, by adjusting the swing angle of the swirl blade 2, the centrifugal force of the refrigerant can also be adjusted.

[0098] The rotation speed of the motor is adjustable, and the sending frequency of the regulating pulses received by the motor is also adjustable, so that the swing angle of the swirl blade 2 can be adjusted.

[0099] The first setting angle has an angle range of 80° to 100°. Preferably, the first setting angle is 90°, indicating that the refrigerant is basically evenly distributed at this time, and only a certain degree of adjustment needs to be made using centrifugal force.

[0100] The second setting angle has an angle range of 170° to 190°. Preferably, the second setting angle is 180°, indicating that the diversion degree of the refrigerant is normal at this time and the centrifugal force needs to be increased for adjustment.

[0101] The angle range of the third setting angle is 350° to 370°. Preferably, the third setting angle indicates that the diversion degree of the refrigerant is very poor at this time, and the centrifugal force needs to be adjusted to the maximum to adjust the diversion of the refrigerant.

[0102] A heat exchange system comprises the above-mentioned flow diversion device.

[0103] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A flow diversion device, characterized in that: include: A shell (1), wherein an inlet channel (11) is formed in the shell (1), and at least two branch outlets (12) are provided on the shell (1), and all the branch outlets (12) are in communication with the inlet channel (11); A swirl blade (2), wherein the swirl blade (2) is arranged in the inlet channel (11), and the swirl blade (2) and the inlet channel (11) together form a spiral flow channel, and the axis of the spiral flow channel is colinear with the axis of the inlet channel (11); The swirl blade (2) can rotate with the axis of the inlet channel (11) as an axis.

2. The flow diversion device according to claim 1, characterized in that: The swirl blade (2) reciprocates and oscillates at a set angle in the inlet channel (11).

3. The flow diversion device according to claim 2, characterized in that: The flow splitting device also includes a control structure, which is capable of acquiring the flow rates of all the flow splitting branch outlets (12) and controlling the swing angle of the swirl blade (2) according to the acquired flow rates.

4. The flow diversion device according to claim 3, characterized in that: The flow dividing device further comprises a driving mechanism (3), wherein the driving mechanism (3) is arranged on the housing (1), the swirl blades (2) are connected to the driving mechanism (3), and the driving mechanism (3) is capable of driving the swirl blades (2) to rotate, and the driving mechanism (3) is electrically connected to the control structure.

5. The flow dividing device according to claim 4, characterized in that: The driving mechanism (3) has at least two operating rotational speeds, and the control structure can control the rotational speed of the driving mechanism (3) according to the acquired flow rate.

6. The flow dividing device according to claim 5, characterized in that: The driving mechanism (3) has a first working speed, a second working speed and a third working speed which increase in sequence, and the control structure is capable of obtaining an average flow rate A0 of all the branch outlets (12) and a flow rate An of each branch outlet (12), and the number of the branch outlets (12) is N; When the number of the flow branch outlets (12) corresponding to |An-A0|≥a is greater than N / 2, the driving mechanism (3) operates at the third operating speed; When the number of the flow branch outlets (12) corresponding to |An-A0|≥a is between N / 3 and N / 2, the driving mechanism (3) operates at the second operating speed; When the number of the flow branch outlets (12) corresponding to |An-A0|≥a is less than N / 3, the driving mechanism (3) operates at the first operating speed; Wherein, a is the preset difference.

7. The flow dividing device according to claim 3, characterized in that: The setting angle of the swirl blade (2) has a first setting angle, a second setting angle and a third setting angle which increase in sequence, the control structure is capable of obtaining an average flow rate A0 of all the branch outlets (12) and a flow rate An of each branch outlet (12), and the number of the branch outlets (12) is N; When the number of the flow branch outlets (12) corresponding to |An-A0|≥a is greater than N / 2, the swirl blade (2) swings at the third set angle; When the number of the flow branch outlets (12) corresponding to |An-A0|≥a is between N / 3 and N / 2, the swirl blade (2) swings at the second set angle; When the number of the flow branch outlets (12) corresponding to |An-A0|≥a is less than N / 3, the swirl blade (2) swings at the first set angle; Wherein, a is the preset difference.

8. The flow dividing device according to claim 7, characterized in that: The first setting angle has an angle range of 80° to 100°; and / or, the second setting angle has an angle range of 170° to 190°; and / or, the third setting angle has an angle range of 350° to 370°.

9. The flow dividing device according to claim 1, characterized in that: The flow dividing device further comprises a rectifier (4), wherein the rectifier (4) is arranged in the inlet channel (11), and the rectifier (4) is located downstream of the swirl blade (2).

10. The flow dividing device according to claim 9, characterized in that: 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 evenly distributed on the plate body.

11. The flow dividing device according to claim 9, 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.

12. A control method for a flow diversion device according to any one of claims 1 to 11, characterized in that: include: Obtaining the flow rate An at all the branch outlets (12), calculating the average flow rate A0 of all the branch outlets (12), and comparing all An with A0; According to the comparison result between An and A0, the rotation angle and / or the rotation speed of the swirl blade (2) is controlled.

13. The control method according to claim 12, characterized in that: In controlling the rotation angle and / or rotation speed of the swirl blade (2) according to the comparison result of An and A0, the method comprises: When the number of the flow branch outlets (12) corresponding to |An-A0|≥a is greater than N / 2, the swirl blades (2) swing at a third speed; When the number of the flow branch outlets (12) corresponding to |An-A0|≥a is between N / 3 and N / 2, the swirl blades (2) swing at a second rotation speed; When the number of the flow branch outlets (12) corresponding to |An-A0|≥a is less than N / 3, the swirl blades (2) swing at a first rotation speed; Wherein, a is a preset difference; the first speed < the second speed < the third speed.

14. The control method according to claim 12, characterized in that: In controlling the rotation angle and / or rotation speed of the swirl blade (2) according to the comparison result of An and A0, the method comprises: When the number of the flow branch outlets (12) corresponding to |An-A0|≥a is greater than N / 2, the swirl blade (2) swings at a third set angle; When the number of the flow branch outlets (12) corresponding to |An-A0|≥a is between N / 3 and N / 2, the swirl blade (2) swings at a second set angle; When the number of the flow branch outlets (12) corresponding to |An-A0|≥a is less than N / 3, the swirl blade (2) swings at a first set angle; Wherein, a is a preset difference; the first set angle < the second set angle < the third set angle.

15. A heat exchange system, characterized in that: A control method comprising the diversion device according to any one of claims 1 to 11 or applying the diversion device according to any one of claims 12 to 14.

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