Heat dissipation device and electronic equipment

Abstract

The invention relates to the technical field of radiators, and provides a heat dissipation device and electronic equipment. The heat dissipation device comprises a body, a target piece and a driving piece; the body comprises a cavity, an air inlet and an air outlet, wherein the air inlet and the air outlet are communicated with the cavity. The target piece is arranged in the cavity and has a first state and a second state; the driving part is used for driving the target part to be switched between a first state and a second state so as to form an air suction cavity comprising an air inlet and an air blowing cavity comprising an air outlet; the air suction cavity is used for sucking air, and the air blowing cavity is used for blowing out air. The electronic equipment comprises a heating source part, a heat dissipation cavity corresponding to the heating source part, an air inlet and an air outlet, wherein the air inlet and the air outlet are communicated with the heat dissipation cavity; the equipment body can act on the heat dissipation cavity to enable the heat dissipation cavity to form a first state and a second state which can be switched; in the first state and the second state, an air suction cavity communicated with the air inlet and an air blowing cavity communicated with the air outlet can be formed in the heat dissipation cavity.

Description

Technical Field

[0001] The present disclosure relates to the technical field of radiators, and in particular to a heat dissipation device and an electronic device. Background Art

[0002] With the emergence of high-computing power chips, some electronic devices with high-computing power chips urgently need more efficient system cooling solutions to ensure that the performance of high-computing power chips can be fully released.

[0003] Traditional fan-cooled heat dissipation devices or liquid-cooled heat dissipation devices are large in size and complex in structure. They can be used in large electronic devices such as computer hosts and laptops, but are difficult to apply to small mobile electronic devices such as mobile phones and smart watches.

[0004] In view of this, a heat dissipation device with a new structure is urgently needed in the market to at least solve the problem that small and medium-sized electronic devices in the prior art are difficult to match with suitable heat dissipation devices. Summary of the invention

[0005] The present disclosure provides a heat dissipation device and an electronic device, so as to at least solve the problem in the prior art that small-sized electronic devices are difficult to match with suitable heat dissipation devices.

[0006] The heat dissipation device provided by the embodiment of the present disclosure includes a body, a target member and a driving member;

[0007] The body includes a cavity, and an air inlet and an air outlet respectively communicated with the cavity;

[0008] The target part is disposed in the cavity and has a first state and a second state;

[0009] The driving member is used to drive the target member to switch between a first state and a second state, so as to form an air suction chamber including the air inlet and an air blowing chamber including the air outlet;

[0010] The suction chamber is used for sucking in gas, and the blowing chamber is used for blowing out the gas.

[0011] In one possible implementation, the target part is in a first state, the cavity divides a first space and a second space, the target part is in a second state, the cavity divides a third space and a fourth space;

[0012] The driving member drives the target member to switch between a first state and a second state, the suction chamber switches between the first space and the fourth space, and the blowing chamber switches between the second space and the third space.

[0013] In one possible implementation, the driving member drives the target member to switch between the first state and the second state, and the target member acts on the suction chamber to generate suction while also acting on the blowing chamber to generate thrust;

[0014] Or, in the process that the driving member drives the target member to switch from the first state to the second state, the target member acts on the suction chamber to generate suction; in the process that the driving member drives the target member to switch from the second state to the first state, the target member acts on the blowing chamber to generate thrust.

[0015] In one possible implementation, the target member can reciprocate under the drive of the driving member and simultaneously adjust the volume of the suction chamber and the blowing chamber;

[0016] In the first state, the first space has the largest volume and is connected to the air inlet, and the second space has the smallest volume and is connected to the air outlet;

[0017] In the second state, the volume of the third space is the smallest and is connected to the air outlet, and the volume of the fourth space is the largest and is connected to the air inlet.

[0018] In one possible implementation, the target member includes a vibrating member disposed in the cavity, and the driving member includes a piezoelectric vibrator connected to the vibrating piece;

[0019] The piezoelectric vibrator can drive the vibrating member to perform reciprocating periodic vibration under the action of piezoelectricity, so that the target member switches back and forth between the first state and the second state;

[0020] The target member is in a first state, and the vibrating member separates the cavity into the first space and the second space;

[0021] The target member is in the second state, and the vibrating member divides the cavity into the third space and the fourth space.

[0022] In one possible implementation, the vibrating member includes a first vibrating member, a second vibrating member and a third vibrating member;

[0023] The first vibrating member is arranged corresponding to the air inlet, and one end close to the air inlet is a vibrating portion;

[0024] The second vibrating member is arranged corresponding to the air outlet, and one end close to the air outlet is a vibrating part;

[0025] The third vibrating member is disposed between the first vibrating portion and the second vibrating portion, and the third vibrating member is a vibrating portion as a whole;

[0026] The target member is in a first state, the vibrating part of the first vibrating member connects the second space with the air outlet, the vibrating part of the second vibrating member connects the first space with the air inlet, and the third vibrating member vibrates and presses toward the second space with a maximum amplitude;

[0027] The target part is in the second state, the vibrating part of the first vibrating part connects the third space with the air outlet, the vibrating part of the second vibrating part connects the third space with the air inlet, and the third vibrating part vibrates and squeezes toward the third space with a maximum amplitude.

[0028] In one possible implementation manner, the end surfaces of the air outlet located in the cavity are all configured as concave arc surfaces;

[0029] The vibration part of the first vibration member and the vibration part of the second vibration member are respectively configured to correspond to the convex arc parts that are seamlessly abutted against the concave arc surface.

[0030] In one possible implementation manner, the air inlets and the air outlets are respectively provided in multiple groups at two ends of the cavity;

[0031] A plurality of the first vibrators are arranged in one-to-one correspondence with the air inlets, and the plurality of the first vibrators can vibrate synchronously in the same direction under the drive of the piezoelectric vibrator;

[0032] A plurality of the second vibrating members are arranged in a one-to-one correspondence with the air outlets, and the plurality of the second vibrating members can vibrate synchronously and in the same direction under the drive of the piezoelectric vibrator.

[0033] In one possible implementation, the target component includes a motor vibrator disposed in the cavity, and the driving component includes an electric drive connected to the motor vibrator;

[0034] The electric drive can drive the motor vibrator to perform reciprocating periodic motion under electromagnetic action, so that the target part switches back and forth between the first state and the second state;

[0035] The target part is in a first state, and the motor vibrator divides the cavity into the first space and the second space;

[0036] The target is in the second state, and the motor vibrator divides the cavity into the third space and the fourth space.

[0037] In one possible implementation manner, the air inlet is provided in the side wall of the cavity parallel to the movement direction of the motor vibrator, and the air outlet is provided in the side wall opposite to the movement direction of the motor vibrator;

[0038] Or, the air outlet is provided in one side wall of the cavity parallel to the movement direction of the motor vibrator, and the air outlet is formed in another side wall of the cavity parallel to the movement direction of the motor vibrator;

[0039] Wherein, when the target part is in the first state, the motor vibrator maximizes the first space and connects with the air inlet, and minimizes the second space and connects with the air outlet;

[0040] When the target part is in a second state, the motor vibrator maximizes the fourth space and connects it to the air inlet, and minimizes the third space and connects it to the air outlet.

[0041] In one possible implementation manner, the periphery of the motor vibrator is further provided with a damping ring that cooperates with the cavity;

[0042] The motor vibrator reciprocates in the cavity in two strokes, and the damping ring can seal and separate the suction cavity from the blowing cavity in at least one of the strokes.

[0043] In one possible implementation manner, a one-way valve is further provided at the air outlet, and the one-way valve is used to limit the air outlet from discharging the gas in the blowing chamber from the inside to the outside;

[0044] And / or a one-way valve is also provided at the air inlet, and the one-way valve is used to limit the air inlet from allowing external air to enter the air suction chamber from the outside to the inside.

[0045] In addition, an embodiment of the present disclosure further provides an electronic device, the electronic device comprising a device body;

[0046] The device body includes a heat source, a heat dissipation cavity corresponding to the heat source, and an air inlet and an air outlet respectively connected to the heat dissipation cavity;

[0047] The device body can act on the heat dissipation cavity to form a switchable first state and a switchable second state;

[0048] In the first state and the second state, the heat dissipation cavity can respectively form an air suction cavity communicated with the air inlet and an air blowing cavity communicated with the air outlet;

[0049] The suction chamber in the first state is different from the suction chamber in the second state, and the blowing chamber in the first state is different from the blowing chamber in the second state;

[0050] The suction chamber is used for sucking in gas, and the blowing chamber is used for blowing out the gas.

[0051] In one possible implementation, the electronic device further includes a heat sink;

[0052] The radiator is arranged outside the heat dissipation cavity and is used for dissipating the heat of the gas discharged from the air outlet.

[0053] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, in which:

[0055] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0056] Figure 1 A three-dimensional diagram showing a first structure of a heat dissipation device provided by an embodiment of the present disclosure;

[0057] Figure 2 Shows Figure 1 The state switching diagram of the heat dissipation device provided in;

[0058] Figure 3 A vertical cross-sectional view of a second structure of a heat dissipation device provided by an embodiment of the present disclosure is shown;

[0059] Figure 4 A three-dimensional diagram showing a third structure of a heat dissipation device provided by an embodiment of the present disclosure;

[0060] Figure 5 Shows Figure 4 The state switching diagram of the heat dissipation device provided in;

[0061] Figure 6 A perspective view showing a fourth structure of the heat dissipation device provided by an embodiment of the present disclosure;

[0062] Figure 7 Shows Figure 6 The state switching diagram of the heat dissipation device provided in;

[0063] Figure 8 A schematic diagram showing the state switching of the fifth structure of the heat dissipation device provided by an embodiment of the present disclosure is shown;

[0064] Fig. 9 A first partial structural diagram of an electronic device provided by an embodiment of the present disclosure is shown;

[0065] Fig.10 Shows Fig. 9 A schematic cross-sectional view of a

[0066] Fig.11 A second partial structural diagram of an electronic device provided by an embodiment of the present disclosure is shown;

[0067] Fig.12 Shows Fig.11 A schematic cross-sectional view of a

[0068] Fig.13 A cross-sectional view showing another configuration of an electronic device provided by an embodiment of the present disclosure.

[0069] Explanation of the reference numerals in the figure: 1, body; 101, first space; 102, second space; 103, third space; 104, fourth space; 11, air suction chamber; 111, air inlet; 12, air blowing chamber; 121, air outlet;

[0070] 2. Target part; 21. First vibrating part; 22. Second vibrating part; 23. Third vibrating part; 24. Damping ring;

[0071] 3. Driving parts;

[0072] 4. Equipment body; 41. Heat source; 42. Radiator. DETAILED DESCRIPTION

[0073] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0074] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0075] Combination Figure 1 and Figure 2 ,or Figure 4 and Figure 5 ,or Figure 6 and Figure 7As shown, an embodiment of the present disclosure provides a heat dissipation device, which includes a main body 1, a target part 2 and a driving part 3; the main body 1 can be specifically but not limited to be configured to be in the shape of a plate, a strip, etc., the cavity in the main body 1 can be but not limited to be configured to be located inside the main body 1 in a hollow manner along the length direction of the main body 1, and the air inlet 111 and the air outlet 121 respectively connected to the cavity can be but not limited to being located in the two end walls of the cavity, or an end wall and a side wall; the target part 2 is arranged in the cavity and has a first state and a second state; the driving part 3 is used to drive the target part 2 to switch between the first state and the second state, so as to form the cavity in the main body 1 into an air suction chamber 11 including the air inlet 111, and an air blowing chamber 12 including the air outlet 121; wherein the air suction chamber 11 is used to inhale gas, and the air blowing chamber 12 is used to blow out gas.

[0076] When the heat dissipation device provided by the embodiment of the present disclosure is working, the driving member 3 applies a driving action to the target member 2 to switch back and forth between the first state and the second state in the cavity of the main body 1, and the target member 2 can form the cavity into a suction chamber 11 for sucking in air and a blowing chamber 12 for blowing out air in the first state, and the target member 2 can reform the cavity into a suction chamber 11 for sucking in air and a blowing chamber 12 for blowing out air in the second state, and the suction chamber 11 and the blowing chamber 12 formed by the target member 2 in the first state are at least not completely the same as the suction chamber 11 and the blowing chamber 12 formed by the target member 2 in the second state.

[0077] In this way, the heat dissipation device provided in the embodiment of the present disclosure can continuously switch the first state and the second state of the target part 2 back and forth by the driving part 3, so that the cavity of the main body 1 can continuously switch to form an air suction chamber 11 for sucking in air and a air blowing chamber 12 for blowing out air, so that the rhythmic inflow and rhythmic outflow of gas in the cavity of the main body 1 can be achieved, so that the heat dissipation device can rhythmically guide and dissipate heat for the heat source, thereby realizing the heat dissipation function of the heat source.

[0078] Moreover, there are many specific switching methods for the target part 2 between the first state and the second state, which can be but not limited to dividing the cavity into the suction cavity 11 and the blowing cavity 12 by changing the relative position, relative posture, relative shape, relative size, etc. of the target part 2 in the cavity. Any switching method that can realize that the cavity in the body 1 is formed into the suction cavity 11 including the air inlet 111 and the blowing cavity 12 including the air outlet 121 when the target part 2 is in the first state and the second state is acceptable.

[0079] In addition, in order to ensure that the suction chamber 11 is used to inhale gas and the blowing chamber 12 is used to blow out gas, the target part 2 can form the suction chamber 11 and the blowing chamber 12 in the first state and the second state respectively, and can also simultaneously reduce the internal pressure of the suction chamber 11 to less than the external environmental pressure and increase the internal pressure of the blowing chamber 12 to greater than the external environmental pressure through the target part 2. In this way, the function of the suction chamber 11 inhaling gas and the blowing chamber 12 blowing out gas can be ensured under the action of the pressure difference.

[0080] Moreover, the specific manner in which the target part 2 changes the internal pressures of the suction chamber 11 and the blowing chamber 12 may be, but is not limited to, changing the situation in which the volume of the cavity is divided by the target part 2 by switching the target part 2 between the first state and the second state, so that the volume of the suction chamber 11 is correspondingly increased and the volume of the blowing chamber 12 is correspondingly reduced.

[0081] To sum up, the heat dissipation device provided by the embodiment of the present disclosure can reciprocately switch the first state and the second state of the target part 2 in the cavity through the driving part 3, and can make the cavity reciprocate to form an air suction chamber 11 for inhaling gas and a air blowing chamber 12 for blowing out gas by the target part 2 in the first state and the second state, thereby realizing the rhythmic inflow and rhythmic outflow of gas in the cavity of the main body 1, thereby realizing the function of rhythmic diversion and heat dissipation of the heat source.

[0082] Compared with traditional fan-cooled heat dissipation devices or liquid-cooled heat dissipation devices, the heat dissipation device provided in the embodiment of the present disclosure adopts a new heat dissipation method. The overall design can be in the form of plates or strips. The structural complexity and size can be greatly reduced, so that it can be more flexibly adapted to small electronic devices, such as mobile phones, smart watches and some small smart wearable devices, etc., and can effectively solve the problem that small electronic devices are difficult to match with suitable heat dissipation devices.

[0083] In one embodiment, the target part 2 is in a first state, and the cavity can be divided into a first space 101 and a second space 102; the target part 2 is in a second state, and the cavity can be divided into a third space 103 and a fourth space 104; the driving part 3 can switch between the first state and the second state by driving the target part 2 to change its shape and / or position in the cavity, the suction cavity 11 switches between the first space 101 and the fourth space 104, and the blowing cavity 12 switches between the second space 102 and the third space 103.

[0084] For example, combined with Figure 2 ,or Figure 5 ,or Figure 7 ,or Figure 8 Further detailed description, Figure 2 , Figure 5 , Figure 8 and Fig. 9 The state (a) in the figure can correspond to the first state, Figure 2 , Figure 5 , Figure 8 and Fig. 9 The state (b) in the figure can correspond to the second state of the target part 2.

[0085] When the target part 2 is in the first state, the target part 2 can separate the cavity into a first space 101 and a second space 102 by its own structural shape and / or its own position in the cavity, and the target part 2 can be but is not limited to using Figure 2 (a) The upwardly diagonal partition cavity, Figure 5 In (a), the partition cavity is arranged on the left side, or a combination of shape and position is used to partition the cavity.

[0086] When the target part 2 is in the second state, the target part 2 can also separate the cavity into the third space 103 and the fourth space 104 by changing its own structural shape and / or its own position in the cavity. For example, the target part 2 can be but is not limited to using Figure 2 (b) The downwardly diagonally partitioned cavity, Figure 5 The partition cavity is arranged on the right in (b).

[0087] In this way, the driving member 3 can realize the switching of the target member 2 between the first state and the second state by driving the target member 2 to "reciprocatingly tilt and rotate" or "reciprocatingly translate and slide" in the cavity, and correspondingly, the first space 101 and the fourth space 104 can be switched and connected with the air inlet 111 respectively, and the second space 102 and the third space 103 can be switched and connected with the air outlet 121 respectively, that is, the function of switching the suction chamber 11 between the first space 101 and the fourth space 104, and switching the blowing chamber 12 between the second space 102 and the third space 103 is realized.

[0088] The specific arrangement of the target part 2 in the cavity has the beneficial effects of simple structure, being able to quickly switch between the first state and the second state by changing its own structural shape or position, and being able to separate into two groups of suction chambers 11 and blowing chambers 12 in one switching cycle.

[0089] It can be understood that the present application does not specifically limit the setting and implementation method of the above-mentioned target part 2, that is, technical personnel in this field can adjust its type according to actual conditions. The above situation is only an illustrative explanation of the ways in which the target part in this application can be implemented, but is not limited to the situations recorded in the above-mentioned embodiments.

[0090] In one embodiment, the driving member 3 drives the target member 2 to switch between the first state and the second state. The target member 2 acts on the suction chamber 11 to generate suction while also acting on the blowing chamber 12 to generate thrust.

[0091] For example, combined with Figure 2 ,or Figure 5 ,or Figure 7 To further explain in detail, in the three specific setting structures of the heat dissipation device, the driving member 3 drives the target member 2 to generate suction in a manner that can be, but is not limited to, switching the target member 2 between the first state and the second state to change the volume of the cavity divided by the target member 2 to form different sizes, and whether switching from the first state to the second state or from the second state to the first state, the volume of the suction chamber 11 is correspondingly increased and the volume of the blowing chamber 12 is correspondingly reduced by changing the structural shape and / or the position of the target member 2, so as to achieve the function of the target member 2 acting on the suction chamber 11 to generate suction while also acting on the blowing chamber 12 to generate thrust.

[0092] For example Figure 2 In the figure, when the driving member 3 drives the target member 2 to switch back and forth between (a) and (b), the target member 2 is driven to "reciprocate and tilt" and at the same time "bulge and squeeze" toward one side to separate the cavity, so that the first space 101 and the fourth space 104 with larger volumes are formed and are respectively connected to the air inlet 111 to form the suction cavity 11, and at the same time, the second space 102 and the third space 103 with smaller volumes are formed and are respectively connected to the air outlet 121 to form the suction cavity 11, and the internal pressure of the suction cavity 11 is less than the external air pressure to generate suction, and the pressure of the blowing cavity 12 is greater than the external air pressure to generate thrust.

[0093] For example Figure 5 or Figure 7 In the figure, when the driving member 3 drives the target member 2 to switch back and forth between (a) and (b), the target member 2 is driven to "slide back and forth" so that the cavity is divided to form a first space 101 with a larger volume and a fourth space 104 which are respectively connected to the air inlet 111 to form an air suction cavity 11, and at the same time, a second space 102 and a third space 103 with a smaller volume are formed which are respectively connected to the air outlet 121 to form the air suction cavity 11, and the internal pressure of the air suction cavity 11 is less than the external air pressure to generate suction, and the pressure of the blowing cavity 12 is greater than the external air pressure to generate thrust.

[0094] The specific setting method of the target member 2 driven by the above-mentioned driving member 3 can make full use of the driving formation of the driving member 3, so that the driving action of the driving member 3 can be simultaneously converted into the suction force of the suction chamber 11 and the thrust of the blowing chamber 12, which can more efficiently improve the diversion and heat dissipation efficiency of the heat dissipation device.

[0095] In one embodiment, when the driving member 3 drives the target member 2 to switch from the first state to the second state, the target member 2 only acts on the suction chamber 11 to generate suction; when the driving member 3 drives the target member 2 to switch from the second state to the first state, the target member 2 only acts on the blowing chamber 12 to generate thrust.

[0096] For example, combined with Figure 8 As further detailed description, in the specific configuration structure of the heat dissipation device, the target part 2 selectively seals and separates the cavity.

[0097] The specific method of the driving member 3 driving the target member 2 to generate suction is: the driving member 3 drives the target member 2 to switch from the first state to the second state, that is, Figure 8 When the target part 2 switches from (a) to (b), the target part 2 is now a non-sealed partition of the cavity, and the driving part 3 drives the target part 2 to gradually slide toward the air inlet 111, and the internal pressure of the second space 102 gradually decreases, and the internal pressure of the first space 101 gradually increases, so that the gas in the first space 101 can enter the second space 102, and the external gas is supplemented into the first space 101, that is, the suction chamber 11 only inhales gas from the outside, and the blowing chamber 12 does not blow gas to the outside.

[0098] The specific method of the driving member 3 driving the target member 2 to generate thrust is: the driving member 3 drives the target member 2 to switch from the second state to the first state, that is, Figure 8 When the target part 2 switches from (b) to (a), the target part 2 seals and separates the cavity, and the driving part 3 drives the target part 2 to gradually slide toward the air outlet 112. The internal pressure of the third space 103 gradually decreases and the internal pressure of the fourth space 104 is dynamically balanced, so that only the blowing chamber 12 discharges gas to the outside.

[0099] The specific setting method of the target member 2 driven by the above-mentioned driving member 3 is similar in principle to the half-cycle work of an air pump, which can better realize the low-frequency diversion and heat dissipation of the heat dissipation device and reduce the noise of the heat dissipation device during operation.

[0100] It can be understood that the present application does not specifically limit the two settings and implementation methods of the target part 2 driven by the above-mentioned driving member 3, that is, technical personnel in this field can adjust its type according to actual conditions. The above situation is only an illustrative explanation of the ways in which the target part in this application can be implemented, but is not limited to the situations recorded in the above-mentioned embodiments.

[0101] In one embodiment, the target part 2 can reciprocate under the drive of the driving part 3, and the reciprocating motion of the target part 2 can be but is not limited to simple harmonic motion, so that the target part 2 can simultaneously adjust the volume of the suction chamber 11 and the blowing chamber 12; in the first state, it can correspond to the node with the maximum positive amplitude of the target part 2 in the motion cycle, so that the volume of the first space 101 can be maximized and only connected to the air inlet 111, and the volume of the second space 102 can be minimized and only connected to the air outlet 121; in the second state, it can correspond to the node with the maximum negative amplitude of the target part 2 in the motion cycle, so that the volume of the third space 103 can be minimized and only connected to the air outlet 121, and the volume of the fourth space 104 can be maximized and only connected to the air inlet 111.

[0102] For example, combined with Figure 2 ,or Figure 5 ,or Figure 7 To further explain in detail, no matter whether the target part 2 is driven by the driving member 3 to perform "reciprocating tilting rotation" or "reciprocating translation sliding", the driving action of the driving member 3 can adopt the periodic output mode of "simple harmonic motion". When the driving target part 2 of the driving member 3 is in the first state, corresponding to the maximum positive amplitude node output by the driving member 3, the corresponding first space 101 has the largest volume and is only connected to the air inlet 111, and the second space 102 has the smallest volume and is only connected to the air outlet 121, that is, the suction force inward of the suction chamber 11 is the strongest, and the blowing force outward of the blowing chamber 12 is the strongest; when the driving target part 2 of the driving member 3 is in the second state, corresponding to the maximum negative amplitude node output by the driving member 3, the corresponding fourth space 104 has the largest volume and is only connected to the air inlet 111, and the third space 103 has the smallest volume and is only connected to the air outlet 121, and it can also be achieved that the suction force inward of the suction chamber 11 is the strongest, and the blowing force outward of the blowing chamber 12 is the strongest.

[0103] The specific manner in which the driving member 3 drives the target member 2 to perform periodic reciprocating motion can achieve the strongest inward suction force in the suction chamber 11 twice at equal time intervals in one driving cycle, and the strongest outward blowing force in the blowing chamber 12 twice, thereby enabling the heat dissipation device to have a greater diversion and heat dissipation power.

[0104] It can be understood that the present application does not specifically limit the implementation method of the reciprocating motion of the target part 2 driven by the above-mentioned driving member 3, that is, technical personnel in this field can adjust its type according to actual conditions. The above situation is only an illustrative explanation of the ways in which the target part in this application can be implemented, but is not limited to the situations recorded in the above-mentioned embodiments.

[0105] In one embodiment, the target part 2 includes a vibrating part arranged in a cavity, and the driving part 3 includes a piezoelectric vibrator connected to a vibrating plate; the piezoelectric vibrator can drive the vibrating part to perform reciprocating periodic vibration under the action of piezoelectricity, so that the target part 2 can switch back and forth between a first state and a second state; when the target part 2 is in the first state, the vibrating part divides the cavity into a first space 101 and a second space 102; when the target part 2 is in the second state, the vibrating part divides the cavity into a third space 103 and a fourth space 104.

[0106] For example, combined with Figure 1 and Figure 2 To further explain in detail, the target part 2 can be specifically set as a vibrating part located in the cavity, and the driving part 3 can be specifically set as a piezoelectric vibrator connected to the vibrating plate, so that the driving part 3 can drive the vibrating part to perform reciprocating periodic vibration under the piezoelectric effect, and the vibration frequency and vibration amplitude of the piezoelectric vibrator and the vibrating plate can be flexibly adjusted by adjusting the input frequency and current size of the control current, so that the target part 2 can be switched back and forth between the first state and the second state at different frequencies and different powers according to the actual use conditions, thereby realizing the function of flexibly adjusting the actual heat dissipation efficiency of the heat dissipation device.

[0107] Moreover, the piezoelectric vibrator can be specifically configured to be clamped on both sides of the vibrating element, and the effective clamping length, effective clamping width and actual thickness of the piezoelectric vibrator in the vibrating element can be adjusted and set according to the actual usage scenario and actual usage power. Moreover, the specific material selection of the vibrating element can be stainless steel film, Ti film, Cu film, NiTi memory film, MEMS process pure Si-based film, PVDF film, carbon fiber cloth film, etc., which can fully match and optimize the vibration and blowing function of the vibrating element, and can also adjust the natural frequency of the vibrating element, so that the vibrating element can resonate and reduce power consumption when vibrating.

[0108] Moreover, the piezoelectric vibrator and the vibration part can be set in a one-to-one correspondence, or a setting method of one vibration part cooperating with multiple piezoelectric vibrators can be adopted. The specific shapes of the piezoelectric vibrator and the vibration part, and the specific setting position of the piezoelectric vibrator in the vibration part can all be adapted and adjusted according to the actual usage scenario.

[0109] It can be understood that the present application does not specifically limit the specific setting method of the above-mentioned driving member 3 and the target member 2, that is, technical personnel in this field can adjust their types according to actual conditions. The above situation is only an illustrative explanation of the ways in which the target member in this application can be implemented, but is not limited to the situations recorded in the above embodiments.

[0110] In one embodiment, the vibrating member may include a first vibrating member 21, a second vibrating member 22 and a third vibrating member 23; the first vibrating member 21 may be arranged corresponding to the air inlet 111, and the end close to the air inlet 111 is the vibrating portion; the second vibrating member 22 may be arranged corresponding to the air outlet 121, and the end close to the air outlet 121 is the vibrating portion; the third vibrating member 23 may be arranged between the first vibrating portion and the third vibrating portion, and the entire vibrating member itself may be the vibrating portion.

[0111] The target part 2 is in the first state, the vibrating part of the first vibrating part 21 only connects the second space 102 with the air outlet 121, the vibrating part of the second vibrating part 22 only connects the first space 101 with the air inlet 111, and the third vibrating part 23 vibrates and squeezes toward the second space 102 with the maximum amplitude, so as to form the first space 101 with the largest volume and the second space 102 with the smallest volume, and make the first space 101 only connect with the air inlet 111 to form the suction chamber 11 with the largest volume, and make the second space 102 only connect with the air outlet 121 to form the blowing chamber 12 with the smallest volume.

[0112] The target part 2 is in the second state, the vibrating part of the first vibrating part 21 only connects the third space 103 with the air outlet 121, the vibrating part of the second vibrating part 22 only connects the third space 103 with the air inlet 111, and the third vibrating part 23 vibrates and squeezes toward the third space 103 with the maximum amplitude, so as to form a fourth space 104 with the largest volume and a third space 103 with the smallest volume, and make the fourth space 104 only connected with the air inlet 111 to form the suction chamber 11 with the largest volume, and make the third space 103 only connected with the air outlet 121 to form the blowing chamber 12 with the smallest volume.

[0113] For example, combined with Figure 1 and Figure 2 To further explain in detail, at this time, the vibrator can be set to be a first vibrator 21, a third vibrator 23 and a second vibrator 22 distributed in sequence along the length direction of the cavity, and the target part 2 is in a first state, and the first vibrator 21, the third vibrator 23 and the second vibrator 22 are distributed in sequence obliquely upward to separate the cavity into a first space 101 and a second space 102; the target part 2 is in a second state, and the first vibrator 21, the third vibrator 23 and the second vibrator 22 extend in sequence obliquely downward to separate the cavity into a third space 103 and a fourth space 104.

[0114] Furthermore, in order to ensure that the vibrating part of the first vibrator 21 and the vibrating part of the second vibrator 22 can always vibrate in the opposite direction, the first vibrator 21 and the second vibrator 22 can be set to have the same period T, but the vibration phase difference between the first vibrator 21 and the second vibrator 22 should be set to T / 2, so that the first vibrator 21 can always vibrate in the same frequency and opposite direction as the second vibrator 22. Furthermore, in order to ensure that the third vibrator 23 can vibrate and squeeze toward the second space 102 or the third space 103 with the maximum amplitude, the maximum amplitude point of the third vibrator 23 can be set at the same frequency as the maximum amplitude point of the first vibrator 21.

[0115] It is also worth mentioning that after the first vibrator 21, the second vibrator 22 and the third vibrator 23 vibrate and guide air in the cavity of the main body 1 for a period of time, the current phase difference of the piezoelectric vibrators in the first vibrator 21, the second vibrator 22 and the third vibrator 23 can be changed respectively, so that the first vibrator 21, the second vibrator 22 and the third vibrator 23 simultaneously enter a vibration state that is completely opposite to the previous vibration state, thereby easily achieving the reverse adjustment of the flow direction in the cavity, so that the cavity in the heat dissipation device can perform regular backblowing of the airflow, thereby achieving the function of regular self-cleaning of the cavity.

[0116] The above-mentioned vibrator and its specific setting method have a simple structure, and can comprehensively change the vibration characteristics of the vibrator by flexibly setting the first vibrator 21, the second vibrator 22 and the third vibrator 23. Moreover, the vibrator as a whole can extend along the length direction and set the amplitude direction to the height direction, so that the heat dissipation device can achieve a flat structure, so that it can be better clamped in a lightweight and small electronic device.

[0117] It can be understood that the present application does not specifically limit the specific setting method of the above-mentioned vibration parts, that is, technical personnel in this field can adjust the type according to actual conditions. The above situation is only an illustrative explanation of the ways in which the target parts in this application can be realized, but is not limited to the situations described in the above embodiments.

[0118] In one embodiment, the end surfaces of the air inlet 111 and the air outlet 121 located in the cavity are both set as concave arc surfaces, and the vibration part of the first vibrator 21 and the vibration part of the second vibrator 22 are respectively set as convex arc parts that seamlessly abut the concave arc surfaces. In this way, when the vibration part of the first vibrator 21 and the vibration part of the second vibrator 22 reciprocate, on the one hand, they can be guided and limited along the concave arc surfaces, and on the other hand, the convex arc parts can better cooperate with the concave arc surfaces when they abut to form seamlessness, thereby improving the shielding and sealing effect of the first vibrator 21 on the air inlet 111 and the second vibrator 22 on the air outlet 121.

[0119] Of course, the seamless abutment between the raised arc portion and the recessed arc surface should be understood as seamless abutment in a macroscopic sense, that is, seamless abutment formed under the premise of currently achievable production technology means.

[0120] In one embodiment, multiple groups of air inlets 111 and air outlets 121 can be respectively arranged at the two ends of the cavity; multiple first vibrators 21 can be arranged one-to-one corresponding to the air inlets 111, and the multiple first vibrators 21 can be driven by a piezoelectric vibrator to vibrate synchronously in the same direction; multiple second vibrators 22 can be arranged one-to-one corresponding to the air outlets 121, and the multiple second vibrators 22 can be driven by a piezoelectric vibrator to vibrate synchronously in the same direction.

[0121] For example, combined with Figure 3 To further explain in detail, at this time, two groups of air inlets 111 and air outlets 121 are respectively set at the two ends of the cavity, two first vibrators 21 are set one-to-one corresponding to the air inlets 111, and two second vibrators 22 are set one-to-one corresponding to the air outlets 121. Since the two first vibrators 21 can be driven by the piezoelectric vibrator to vibrate synchronously in the same direction, and the two second vibrators 22 can be driven by the piezoelectric vibrator to vibrate synchronously in the same direction, the maximum air suction and blowing volume of the heat dissipation device can be increased. In actual use, the actual working number of the first vibrator 21 and the second vibrator 22 can be adjusted according to the actual heating situation of the heat source, so that the heat dissipation device can be used for diversion and heat dissipation with greater heat dissipation power under special working conditions.

[0122] In one embodiment, the target part 2 includes a motor vibrator arranged in a cavity, and the driving part 3 includes an electric drive connected to the motor vibrator; the electric drive can drive the motor vibrator to perform reciprocating periodic motion under electromagnetic action, so that the target part 2 can switch back and forth between a first state and a second state; when the target part 2 is in the first state, the motor vibrator divides the cavity into a first space 101 and a second space 102; when the target part 2 is in the second state, the motor vibrator divides the cavity into a third space 103 and a fourth space 104.

[0123] For example, combined with Figure 4 and Figure 5 ,or Figure 6 and Figure 7To further explain in detail, in both embodiments, the target part 2 is configured as a motor vibrator located in the cavity, and the driving part 3 is configured as an electric drive connected to the motor vibrator, so that the electric drive can drive the motor vibrator to perform reciprocating periodic motion under electromagnetic action. The reciprocating periodic motion can also adopt the above-mentioned "simple harmonic motion", and the reciprocating motion frequency and reciprocating motion distance of the motor vibrator can be flexibly adjusted by adjusting the input frequency and current of the electric drive. Similarly, the target part 2 can be switched back and forth between the first state and the second state at different frequencies and different powers according to actual use conditions, so as to finally realize the function of flexibly adjusting the actual heat dissipation efficiency of the heat dissipation device.

[0124] It can be understood that the present application does not specifically limit the specific setting method of the above-mentioned motor vibrator and electric drive, that is, technical personnel in this field can adjust their types according to actual conditions. The above situation is only an illustrative explanation of the ways in which the target parts in this application can be realized, but is not limited to the situations described in the above embodiments.

[0125] In one possible implementation, an air inlet 111 is provided in a side wall of the cavity parallel to the movement direction of the motor vibrator, and an air outlet 121 is provided in a side wall opposite to the movement direction of the motor vibrator.

[0126] For example, combined with Figure 4 and Figure 5 To further explain in detail, at this time, an air inlet 111 is opened in the side wall of the cavity parallel to the movement direction of the motor vibrator, and an air outlet 121 is opened in each of the two side walls of the cavity opposite to the movement direction of the motor vibrator, so that when the target part 2 is in the first state, the motor vibrator can be as close to an air outlet 121 of the cavity as possible, and form a minimized second space 102 and a maximized first space 101, and the first space 101 is connected to the air inlet 111 at this time; so that when the target part 2 is in the second state, the motor vibrator can be as close to another air outlet 121 of the cavity as possible, and form a minimized third space 103 and a maximized fourth space 104, and the fourth space 104 is connected to the air inlet 111 at this time.

[0127] In this way, during the reciprocating motion of the motor vibrator, it can share an air inlet 111 to respectively take in air from the first space 101 or the fourth space 104, and respectively discharge air through the air outlet 121 opposite to its motion direction, so that the heat dissipation device can inhale air through an air inlet 111 and blow air alternately through two air outlets 121 arranged opposite to each other, thereby improving the flexible layout of the heat dissipation device and improving the adaptability to different usage scenarios.

[0128] In addition, combined Fig.13The progress description is that in order to ensure that the cavity can efficiently inhale and exhaust air under the reciprocating vibration of the motor vibrator, the air inlet 111 in the above-mentioned cavity can be specifically set in correspondence with the heat source, and in order to ensure the dynamic balance of the air flow around the heat source, an opening structure, a slot structure or a ventilation structure corresponding to the air inlet 111 can be set around the heat source to ensure the fluidity of the air flow around the heat source. In addition, the air outlet 121 in the above-mentioned cavity can be set in correspondence with the exhaust duct in the device, so that the hot air flow discharged from the air outlet 121 can be discharged to the external environment more directly and quickly.

[0129] In one embodiment, an air outlet 121 is opened in one side wall of the cavity parallel to the movement direction of the motor vibrator, and an air outlet 121 is formed in another side wall of the cavity parallel to the movement direction of the motor vibrator.

[0130] For example, combined with Figure 6 and Figure 7 To further explain in detail, at this time, an air inlet 111 is opened in the bottom side wall of the cavity parallel to the movement direction of the motor vibrator, and an air outlet 121 is opened in the left and right ends of the two side walls parallel to the movement direction of the motor vibrator, so that when the target part 2 is in the first state, the motor vibrator can also be as close to an air outlet 121 of the cavity as possible, and form a minimized second space 102 and a maximized first space 101, and the first space 101 is connected to the air inlet 111 at this time; so that when the target part 2 is in the second state, the motor vibrator can also be as close to another air outlet 121 of the cavity as possible, and form a minimized third space 103 and a maximized fourth space 104, and the fourth space 104 is connected to the air inlet 111 at this time.

[0131] In this way, during the reciprocating motion of the motor vibrator, it can share an air inlet 111 to respectively intake air into the first space 101 or the fourth space 104, and the two air outlets 121 can also converge the exhaust air through a converging air duct, so that the heat dissipation device can actually inhale air through an air inlet 111 and blow air through a converging air duct, which can also improve the flexible layout of the heat dissipation device and improve the adaptability to different usage scenarios.

[0132] In one possible implementation, a damping ring 24 cooperating with the cavity is further provided on the periphery of the motor vibrator; in the two strokes of the reciprocating movement of the motor vibrator in the cavity, the damping ring 24 can seal and separate the suction cavity 11 from the blowing cavity 12 in at least one stroke.

[0133] For example, combined with Figure 5 or Figure 7To further explain in detail, a damping ring 24 is respectively arranged at both ends of the periphery of the motor vibrator, and the two damping rings 24 can be arranged to be tilted and facing each other, so that when the motor vibrator moves back and forth in the cavity, one damping ring 24 can be expanded outward by friction and compression, and the other damping ring 24 can be contracted by friction and compression. In this way, no matter which direction the motor vibrator moves in the cavity, at least one of the two damping rings 24 can play a sealing role to seal and separate the suction cavity 11 from the blowing cavity 12.

[0134] For example, combined with Figure 8 To further explain in detail, a damping ring 24 is respectively provided at both ends of the periphery of the motor vibrator, but the two damping rings 24 are arranged parallel to each other with an inclination, so that when the motor vibrator moves back and forth in the cavity in two strokes, the damping ring 24 can expand outward due to friction compression in one movement stroke, and contract due to friction compression in the other movement stroke. In this way, the damping ring 24 can seal and separate the suction chamber 11 and the blowing chamber 12 in one direction, so that the gas in the suction chamber 11 can only enter the blowing chamber 12 in one direction.

[0135] The specific arrangement of the damping ring can flexibly adjust the sealing state between the air suction chamber 11 and the air blowing chamber 12, and flexibly adapt to different usage conditions.

[0136] It can be understood that the present application does not specifically limit the specific setting method of the above-mentioned damping ring, that is, technical personnel in this field can adjust its type according to actual conditions. The above situation is only an illustrative explanation of the ways in which the target part in this application can be realized, but is not limited to the situations recorded in the above-mentioned embodiments.

[0137] In one embodiment, a one-way valve is further provided at the air outlet 121, and the one-way valve is used to limit the air outlet 121 to only discharge the gas in the blowing chamber 12 from the inside to the outside; and / or a one-way valve is further provided at the air inlet 111, and the one-way valve is used to limit the air inlet 111 to only allow external air to enter the suction chamber 11 from the outside to the inside.

[0138] For example, combined with Figure 5 or Figure 7 or Figure 8 To further explain in detail, a one-way valve is provided at the air outlet 121, so that the gas in the blowing chamber 12 can only be discharged from the inside to the outside through the one-way valve, thereby effectively preventing the blowing chamber 12 from sucking back the hot air just discharged; a one-way valve is also provided at the air inlet 111, so that only external air can enter the suction chamber 11 from the outside to the inside through the one-way valve, thereby effectively preventing the gas just inhaled in the suction chamber 11 from being discharged through the air inlet 111.

[0139] The specific arrangement of the one-way valve can flexibly adjust the airflow direction of the air suction chamber 11 and the air blowing chamber 12, ensuring that the heat dissipation device can accurately guide air and dissipate heat.

[0140] It can be understood that the present application does not specifically limit the specific setting method of the above-mentioned one-way valve, that is, technical personnel in this field can adjust its type according to actual conditions. The above situation is only an illustrative explanation of the ways in which the target part in this application can be achieved, but is not limited to the situations described in the above embodiments.

[0141] In addition, an embodiment of the present disclosure further provides an electronic device, which includes a device body 4; the device body 4 includes a heat source component 41, a heat dissipation cavity corresponding to the heat source component 41, and an air inlet 111 and an air outlet 121 respectively connected to the heat dissipation cavity; the device body 1 can act on the heat dissipation cavity to form a switchable first state and a second state; in the first state and the second state, an air suction cavity 11 connected to the air inlet 111 and an air blowing cavity 12 connected to the air outlet 121 can be respectively formed in the heat dissipation cavity; and the air suction cavity 11 in the first state is different from the air suction cavity 11 in the second state, and the air blowing cavity 12 in the first state is different from the air suction cavity 11 in the second state; wherein, the air suction cavity 11 is used to inhale gas, and the air blowing cavity 12 is used to blow out gas.

[0142] For example, combined with Fig. 9 and Fig.10 ,or Fig.11 and Fig.12 To further explain in detail, the electronic device can be but not limited to mobile phones, smart watches, various types of electronic wearable devices, etc., because the device body 4 of the electronic device can form a heat dissipation cavity, and an air inlet 111 and an air outlet 121 respectively connected to the heat dissipation cavity, and the device body 1 can act on the heat dissipation cavity to form a switchable first state and a second state, and in the first state and the second state, an air suction cavity 11 connected to the air inlet 111 and a blowing cavity 12 connected to the air outlet 121 are respectively formed, and the air suction cavity 11 is used to inhale gas, and the blowing cavity 12 is used to blow out gas, thereby realizing the diversion and heat dissipation of the heat source 41 in the device body 4, and its technical principle, technical implementation method and technical effect are consistent with the heat dissipation device provided in the above-mentioned embodiment of the present disclosure, and will not be further elaborated here.

[0143] In one possible implementation, the electronic device provided by the embodiment of the present disclosure further includes a heat sink 42 ; the heat sink 42 is disposed outside the heat dissipation cavity, and is used to dissipate the heat of the gas exhausted from the air outlet 121 .

[0144] For example, combined with Fig. 9To further explain in detail, the radiator 42 may be specifically provided with a plurality of mutually spaced heat dissipating fins and heat dissipating channels extending along the air outlet direction of the air outlet 121, and the radiator 42 may be, but is not limited to, made of copper material with relatively good thermal conductivity, so that the hot gas blown out of the air outlet 121 can enter the radiator 42 in time, and after entering the radiator 42 for heat dissipation and heat conduction, it is discharged to the outside of the electronic device.

[0145] It can be understood that the present application does not specifically limit the specific setting method of the above-mentioned radiator 42, that is, technical personnel in this field can adjust its type according to actual conditions. The above situation is only an illustrative explanation of the ways in which the target part in this application can be realized, but is not limited to the situations recorded in the above-mentioned embodiments.

[0146] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0147] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A heat dissipation device, comprising: A body, the body comprising a cavity, and an air inlet and an air outlet respectively communicated with the cavity; a target part, disposed in the cavity and having a first state and a second state; A driving member, used for driving the target member to switch between a first state and a second state, so as to form an air suction chamber including the air inlet and an air blowing chamber including the air outlet; The suction chamber is used for sucking in gas, and the blowing chamber is used for blowing out the gas.

2. The heat dissipation device according to claim 1, wherein the target part is in a first state, the cavity divides a first space and a second space, and the target part is in a second state, the cavity divides a third space and a fourth space; The driving member drives the target member to switch between a first state and a second state, the suction chamber switches between the first space and the fourth space, and the blowing chamber switches between the second space and the third space.

3. The heat dissipation device according to claim 2, wherein the driving member drives the target member to switch between the first state and the second state, and the target member acts on the suction chamber to generate suction while also acting on the blowing chamber to generate thrust; Or, the driving member drives the target member to switch from the first state to the second state, and the target member acts on the suction chamber to generate suction; In the process that the driving member drives the target member to switch from the second state to the first state, the target member acts on the blowing cavity to generate thrust.

4. The heat dissipation device according to claim 3, wherein the target member can reciprocate under the driving of the driving member and simultaneously adjust the volume of the air suction chamber and the air blowing chamber; In the first state, the first space has the largest volume and is connected to the air inlet, and the second space has the smallest volume and is connected to the air outlet; In the second state, the volume of the third space is the smallest and is connected to the air outlet, and the volume of the fourth space is the largest and is connected to the air inlet.

5. The heat dissipation device according to claim 4, wherein the target member comprises a vibrating member disposed in the cavity, and the driving member comprises a piezoelectric vibrator connected to the vibrating piece; The piezoelectric vibrator can drive the vibrating member to perform reciprocating periodic vibration under the action of piezoelectricity, so that the target member switches back and forth between the first state and the second state; The target member is in a first state, and the vibrating member separates the cavity into the first space and the second space; The target member is in the second state, and the vibrating member divides the cavity into the third space and the fourth space.

6. The heat dissipation device according to claim 5, wherein the vibration member comprises: A first vibrating member, which is arranged corresponding to the air inlet, and has an end close to the air inlet as a vibrating portion; A second vibrating member is arranged corresponding to the air outlet, and one end close to the air outlet is a vibrating part; A third vibrating member is disposed between the first vibrating portion and the second vibrating portion, and the third vibrating member is a vibrating portion as a whole; The target member is in a first state, the vibrating part of the first vibrating member connects the second space with the air outlet, the vibrating part of the second vibrating member connects the first space with the air inlet, and the third vibrating member vibrates and presses toward the second space with a maximum amplitude; The target part is in the second state, the vibrating part of the first vibrating part connects the third space with the air outlet, the vibrating part of the second vibrating part connects the third space with the air inlet, and the third vibrating part vibrates and squeezes toward the third space with a maximum amplitude.

7. The heat dissipation device according to claim 6, wherein the end surfaces of the air inlet and the air outlet located in the cavity are both configured as concave arc surfaces; The vibration part of the first vibration member and the vibration part of the second vibration member are respectively configured to correspond to the convex arc parts that are seamlessly abutted against the concave arc surface.

8. The heat dissipation device according to claim 6, wherein the air inlet and the air outlet are respectively provided in a plurality of groups at two ends of the cavity; A plurality of the first vibrators are arranged in one-to-one correspondence with the air inlets, and the plurality of the first vibrators can vibrate synchronously in the same direction under the drive of the piezoelectric vibrator; A plurality of the second vibrating members are arranged in a one-to-one correspondence with the air outlets, and the plurality of the second vibrating members can vibrate synchronously and in the same direction under the drive of the piezoelectric vibrator.

9. The heat dissipation device according to claim 4, wherein the target component comprises a motor vibrator disposed in the cavity, and the driving component comprises an electric drive connected to the motor vibrator; The electric drive can drive the motor vibrator to perform reciprocating periodic motion under electromagnetic action, so that the target part switches back and forth between the first state and the second state; The target part is in a first state, and the motor vibrator divides the cavity into the first space and the second space; The target is in the second state, and the motor vibrator divides the cavity into the third space and the fourth space.

10. The heat dissipation device according to claim 9, wherein the air inlet is provided in the side wall of the cavity parallel to the movement direction of the motor vibrator, and the air outlet is provided in the side wall opposite to the movement direction of the motor vibrator; Or, the air outlet is provided in one side wall of the cavity parallel to the movement direction of the motor vibrator, and the air outlet is formed in another side wall of the cavity parallel to the movement direction of the motor vibrator; in, When the target part is in a first state, the motor vibrator maximizes the first space and connects with the air inlet, and minimizes the second space and connects with the air outlet; When the target part is in a second state, the motor vibrator maximizes the fourth space and connects it to the air inlet, and minimizes the third space and connects it to the air outlet.

11. The heat dissipation device according to claim 9 or 10, wherein the periphery of the motor vibrator is further provided with a damping ring matched with the cavity; The motor vibrator reciprocates in the cavity in two strokes, and the damping ring can seal and separate the suction cavity from the blowing cavity in at least one of the strokes.

12. The heat dissipation device according to claim 9 or 10, wherein a one-way valve is further provided at the air outlet, and the one-way valve is used to limit the air outlet from discharging the gas in the blowing chamber from the inside to the outside; And / or a one-way valve is also provided at the air inlet, and the one-way valve is used to limit the air inlet from allowing external air to enter the air suction chamber from the outside to the inside.

13. An electronic device, comprising a device body; The device body includes a heat source, a heat dissipation cavity corresponding to the heat source, and an air inlet and an air outlet respectively connected to the heat dissipation cavity; The device body can act on the heat dissipation cavity to form a switchable first state and a switchable second state; In the first state and the second state, the heat dissipation cavity can respectively form an air suction cavity communicated with the air inlet and an air blowing cavity communicated with the air outlet; The suction chamber in the first state is different from the suction chamber in the second state, and the blowing chamber in the first state is different from the blowing chamber in the second state; The suction chamber is used for sucking in gas, and the blowing chamber is used for blowing out the gas.

14. The electronic device according to claim 13, characterized in that: The electronic device further comprises a radiator; The radiator is arranged outside the heat dissipation cavity and is used for dissipating the heat of the gas discharged from the air outlet.

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