Head-mounted devices

Abstract

This invention discloses a head-mounted device, comprising a housing, a heating element, a phase change assembly, and a fan. The housing has an air inlet, an air outlet, and a heat dissipation duct connecting the air inlet and outlet. The heating element, phase change assembly, and fan are all disposed within the heat dissipation duct. The phase change assembly includes a connected evaporation section and a condensation section, with the condensation section located on the side of the evaporation section away from the heating element. The fan is located between the evaporation section and the heating element. The head-mounted device features both an internal circulation heat dissipation mode (with both the air inlet and outlet closed) and an external circulation heat dissipation mode (with both the air inlet and outlet open). The technical solution of this invention aims to meet the heat dissipation requirements of the head-mounted device under different operating modes through internal and external circulation heat dissipation modes, reducing the need for the fan to operate at excessively high speeds, thereby reducing noise and power consumption and improving the user experience.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wearable devices, in particular to a head-mounted device. BACKGROUND

[0002] The VR device is a head-mounted device with high integration of independent processing operation system, optical display system and sound system in limited space, which is mainly applied in the fields of game, education, tourism and business, etc. The power consumption and heat generated are different when the VR device runs different application software. In order to meet the corresponding heat dissipation requirements, the speed of the fan for heat dissipation inside the head-mounted device needs to be adjusted adaptively. When the VR device runs high-power applications, the speed of the fan will be high, the noise will be large, and the power consumption will inevitably be accelerated, which greatly reduces the user experience. SUMMARY

[0003] The main purpose of the present application is to provide a head-mounted device, which aims to meet the heat dissipation requirements of the head-mounted device in different working modes through the internal and external circulation heat dissipation modes, so that the fan does not have to run at too high a speed, thereby reducing noise and power consumption, and improving user experience.

[0004] To achieve the above purpose, the head-mounted device provided by the present application comprises:

[0005] A housing is provided with an air inlet, an air outlet and a heat dissipation air duct communicating with the air inlet and the air outlet;

[0006] A heating element is arranged in the heat dissipation air duct;

[0007] A phase change assembly is arranged in the heat dissipation air duct, comprising an evaporation part and a condensation part in communication, and the condensation part is located on the side of the evaporation part away from the heating element; and

[0008] A fan is arranged in the heat dissipation air duct and located between the evaporation part and the heating element;

[0009] Wherein, the head-mounted device has an internal circulation heat dissipation mode in which the air inlet and the air outlet are closed, and an external circulation heat dissipation mode in which the air inlet and the air outlet are opened.

[0010] Optionally, the evaporation part is provided with an air passage, the air inlet side of the air passage is communicated with the air outlet side of the fan, and the air outlet side of the air passage has a first air passage and a second air passage;

[0011] In the internal circulation heat dissipation mode, the flow path from the first air passage to the air outlet is disconnected, and the flow path from the second air passage to the air inlet side of the fan is connected, so as to form an internal circulation flow path in the heat dissipation air duct;

[0012] In the outer circulation heat dissipation mode, the flow path from the second air passage to the air inlet side of the fan is disconnected, the flow path from the air inlet to the air inlet side of the fan and the flow path from the first air passage to the air outlet are connected, so as to form an outer circulation flow path between the external environment and the heat dissipation air duct.

[0013] Optionally, the evaporation part comprises a body part and a plurality of heat dissipation fins, the body part is arranged on the air outlet side of the fan, the heat dissipation fins are arranged on the side of the body part close to the air outlet, the air passage is formed by the body part and the plurality of heat dissipation fins, and the first air passage and the second air passage are formed between the plurality of heat dissipation fins.

[0014] Optionally, the phase change assembly further comprises a shielding piece, the shielding piece is movably arranged on the heat dissipation fins, so as to have two positions of covering the first air passage and covering the second air passage.

[0015] Optionally, the plurality of heat dissipation fins are arranged in convex arc shape on the side where the first air passage is located and the side where the second air passage is located, and the shielding piece corresponds to an arc shape, so as to be adapted to the side where the first air passage is located and the side where the second air passage is located of the plurality of heat dissipation fins.

[0016] Optionally, the condensation part is arranged above the body part and is connected to the body part through a throttling pipe.

[0017] Optionally, the condensation part is in an arc structure protruding upwards, and the throttling pipe is connected to a position of the condensation part away from the top of the arc.

[0018] Optionally, the air outlet is arranged on the upper side of the shell, the air inlet is arranged on the lower side of the shell, the fan is arranged on the upper side of the heat generating element and is connected to the lower side of the body part.

[0019] The first air passage is arranged on the upper side of the heat dissipation fin.

[0020] Optionally, the upper side of the condensation part is further connected with a heat dissipation plate, and the heat dissipation plate is exposed to the outside of the shell.

[0021] Optionally, the side of the heat dissipation fin away from the second air outlet is provided with a heat insulation pad, and the condensation part is connected to the heat insulation pad.

[0022] Optionally, the overwind channels include first overwind channels formed in the body part and second overwind channels formed between the plurality of heat dissipation fins, the first overwind channels and the second overwind channels are provided in one-to-one correspondence, and a second overwind channel is formed between every two adjacent heat dissipation fins, and a cavity for evaporation of the phase change material is arranged in the wall of the first overwind channel.

[0023] Optionally, a heat pipe is further connected between the body part and the heat generating element, an evaporation end of the heat pipe is connected to the heat generating element, and a condensation end of the heat pipe is connected to the body part.

[0024] Optionally, the head-mounted device further comprises a temperature sensor and a controller, the temperature sensor is used to detect the temperature of the condensation part, and the controller can control the head-mounted device to switch between the internal circulation heat dissipation mode and the external circulation heat dissipation mode according to the temperature fed back by the temperature sensor.

[0025] The heat dissipation system of the head-mounted device of the present application is additionally provided with a phase change assembly, and the phase change assembly stores phase change material, wherein the evaporation part has a cavity for evaporation of the phase change material, the condensation part has a cavity for condensation of the phase change material, the two cavities are in communication with each other, the phase change material evaporated in the evaporation part can flow to the condensation part for condensation, and then continue to evaporate in the evaporation part. The fan can drive air to flow between the evaporation part and the heat generating element to exchange heat by forced convection, so that the heat generating element can be cooled better. When the head-mounted device operates at a low power, the heat generated by the head-mounted device is also relatively small, at this time, the head-mounted device can be in the external circulation heat dissipation mode, so that the air inlet and the air outlet are both opened. In this mode, the fan operates to make the air of the external environment enter the heat dissipation air duct from the air inlet, and exchange heat with the heat generating element by forced convection. The air after heat exchange flows to the external environment through the air outlet. In this process, the air also exchanges heat with the evaporation part by forced convection, so that the heat generated by the heat generating element can be dissipated better to avoid high temperature of the device. When the head-mounted device operates at a high power, for example, when the VR device, large game application software and 6DoF interface work at the same time, the head-mounted device can enter the internal circulation heat dissipation mode. At this time, since the air inlet and the air outlet are both closed, the fan operates to make the air circulate in the heat dissipation air duct, which can intensify the forced convection heat exchange between the heat generating element and the evaporation part. The cold energy released by the phase change material evaporated in the evaporation part can be better transmitted to the heat generating element. In this way, the rotation speed of the fan does not have to be increased too much to meet the heat dissipation requirements of the head-mounted device in the high power working mode. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only need to be some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0027] Figure 1 Structure diagram of an embodiment of the shell of the head-mounted device of the present application;

[0028] Figure 2 Structure diagram of the partial structure in Figure 1 Enlarged view of A in

[0029] Figure 3 Structure diagram of the partial structure in Figure 1 Enlarged view of A in when the air outlet is opened

[0030] Figure 4 Structure diagram of an embodiment of the shell of the head-mounted device of the present application;

[0031] Figure 5 Structure diagram of an embodiment of the partial structure of the head-mounted device of the present application;

[0032] Figure 6 Structure diagram of the partial structure in another view in Figure 5

[0033] Figure 7 Structure diagram of an embodiment of the phase change assembly of the head-mounted device of the present application;

[0034] Figure 8 Structure diagram of an embodiment of the evaporation part of the head-mounted device of the present application.

[0035] Explanation of the reference signs:

[0036] Reference Name Reference Name 100 Housing 320 Radiating fin 101 Air inlet 321 Second air passage 102 Air outlet 330 Shielding member 103 Avoidance passage 331 Rotating shaft 200 Heating element 400 Condensing part 300 Evaporating part 410 Throttling pipe 301 Air passage 420 Radiating plate 302 First air passage 430 Thermal insulation pad 303 Second air passage 500 Fan 310 Body part 600 Heat pipe 311 First air passage 700 Controller

[0037] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0039] ​It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, motion condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0040] The terms "connection", "installation", "fixation" and the like should be understood broadly, for example, "connection" can be fixed connection, or detachable connection, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In addition, if the embodiments of the present application involve "first", "second" and the like, the "first", "second" and the like are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0042] The present application provides a head-mounted device.

[0043] In an embodiment of the present application, as shown in the figure, the head-mounted device comprises: Figures 1 to 6

[0044] The shell 100 is provided with an air inlet 101, an air outlet 102 and a heat dissipation air duct communicating the air inlet 101 and the air outlet 102;

[0045] The heat generating element 200 is arranged in the heat dissipation air duct; wherein the heat generating element 200 can be a chip, a circuit board, etc.

[0046] The phase change assembly is arranged in the heat dissipation air duct and comprises an evaporation part 300 and a condensation part 400 in communication, and the condensation part 400 is located on the side of the evaporation part 300 away from the heat generating element 200; and

[0047] The fan 500 is arranged in the heat dissipation air duct and located between the evaporation part 300 and the heat generating element 200;

[0048] ​The head-mounted device has an internal circulation cooling mode in which the air inlet 101 and the air outlet 102 are closed and an external circulation cooling mode in which the air inlet 101 and the air outlet 102 are opened.

[0049] The heat dissipation system of the head-mounted device of the present application is additionally provided with a phase change assembly in which a phase change material is stored, wherein the evaporation part 300 has a chamber for evaporation of the phase change material, the condensation part 400 has a chamber for condensation of the phase change material, and the two chambers are in communication with each other, the phase change material evaporated in the evaporation part 300 can flow to the condensation part 400 for condensation and then continue to evaporate in the evaporation part 300. The fan 500 can force the air to flow and exchange heat between the evaporation part 300 and the heat generating element 200, so that the heat generating element 200 can be cooled better.

[0050] When the head-mounted device operates at a low power, the heat generated is also relatively small, at this time, the head-mounted device can be in the external circulation cooling mode, so that the air inlet 101 and the air outlet 102 are opened, in this mode, the fan 500 operates, so that the air in the external environment enters the heat dissipation air duct from the air inlet 101 and exchanges heat with the heat generating element 200 by forced convection, the air after heat exchange flows to the external environment through the air outlet 102, in this process, the air also exchanges heat with the evaporation part 300 by forced convection, so that the heat generated by the heat generating element 200 can be better dissipated to avoid high temperature of the device.

[0051] When the head-mounted device operates at a high power, for example, in a VR device, a large game application software and a 6DoF interface work at the same time, the head-mounted device can enter the internal circulation cooling mode. At this time, since the air inlet 101 and the air outlet 102 are closed, the fan 500 operates, so that the air circulates in the heat dissipation air duct, which can intensify the forced convection heat exchange between the heat generating element 200 and the evaporation part 300, the cold energy released by the phase change material evaporated in the evaporation part 300 can be better transferred to the heat generating element 200, so that the rotation speed of the fan 500 does not have to be excessively high to meet the heat dissipation requirement of the head-mounted device in the high power working mode.

[0052] The internal part of the existing VR device does not have a phase change component, and the heat dissipation of the device relies on the external circulation mode. When the VR device is running at high power, only by increasing the rotating speed of the fan 500, the air flow speed in the device can be increased, so that more heat can be taken to the external environment. However, the rotating speed of the fan 500 is high, the noise is large, and the power consumption is inevitably accelerated, which greatly reduces the user experience. The head-mounted device of the present application adds a phase change component, and the head-mounted device can be switched between the internal circulation heat dissipation mode and the external circulation heat dissipation mode to meet the heat dissipation requirements of the head-mounted device in the high-power working mode and the low-power working mode respectively, so that the fan 500 does not have to run at too high a speed to reduce noise and power consumption, thereby improving user experience.

[0053] Further, in the present embodiment, please refer to Figures 5 to 8 The evaporation part 300 is provided with an air passage 301, the air inlet side of the air passage 301 is communicated with the air outlet side of the fan 500, the air outlet side of the air passage 301 has a first air outlet 302 and a second air outlet 303; in the internal circulation heat dissipation mode, the flow path from the first air outlet 302 to the air outlet 102 is disconnected, and the flow path from the second air outlet 303 to the air inlet side of the fan 500 is connected, to form an internal circulation flow path in the heat dissipation air duct; in the external circulation heat dissipation mode, the flow path from the second air outlet 303 to the air inlet side of the fan 500 is disconnected, and the flow path from the air inlet 101 to the air inlet side of the fan 500 and the flow path from the first air outlet 302 to the air outlet 102 are connected, to form an external circulation flow path between the external environment and the heat dissipation air duct. In the internal circulation flow path, the hot air around the heating element 200 will flow to the air passage 301 under the action of the fan 500, to exchange heat with the evaporation part 300, and the cooled air will flow to the air inlet side of the fan 500 through the first air outlet 302, to continue to exchange heat with the heating element 200 and other components in the heat dissipation air duct, to play a role in dissipating heat of the head-mounted device. The air passage 301 provided by the evaporation part 300 can prolong the travel distance of the air and the convective heat exchange with the evaporation part 300, which is beneficial to improve the cooling effect of the air. In the external circulation flow path, the air of the external environment enters from the air inlet 101, exchanges heat with the heating element 200 in convection, and then flows to the air outlet 102 through the second air outlet 303 of the air passage 301, and then returns to the external environment. Thus, the heat generated by the heating element 200 is taken to the external environment through the flow of air, to achieve the purpose of dissipating heat of the head-mounted device.

[0054] Further, in the present embodiment, as Figure 7 And Figure 8As shown, the evaporation section 300 includes a body section 310 and a plurality of heat dissipation fins 320. The body section 310 is disposed on the air outlet side of the fan 500, and the heat dissipation fins 320 are disposed on the side of the body section 310 near the air outlet 102. The air passage 301 is formed by the body section 310 and the plurality of heat dissipation fins 320. The first air passage 302 and the second air passage 303 are formed between the plurality of heat dissipation fins 320. It can be understood that the plurality of heat dissipation fins 320 are distributed at intervals, forming air passages on the side away from the body section 310 and on the adjacent side of the body section 310, serving as the first air passage 302 or the second air passage 303. Furthermore, the arrangement of the heat dissipation fins 320 increases the heat exchange area of ​​the evaporation section 300, which is beneficial to further improve the cooling effect of the air flowing through the air passage 301. Of course, in other embodiments, the evaporator 300 may have an air passage 301 formed inside, and the outer wall may have a first air passage 302 and a second air passage 303 opening in different directions on different sides.

[0055] Specifically, such as Figure 8 As shown, the air passage 301 includes a first air passage 311 formed in the body portion 310 and a second air passage 321 formed between a plurality of heat dissipation fins 320. Multiple first air passages 311 and second air passages 321 are provided in a one-to-one correspondence, with one second air passage 321 formed between every two adjacent heat dissipation fins 320. A chamber for evaporation of the phase change material is provided within the wall of the first air passage 311. The arrangement of multiple first air passages 311 and multiple second air passages 321 can further increase the heat exchange surface area of ​​the evaporation portion 300, thereby further improving the convective heat transfer coefficient between the air and the evaporation portion 300, and thus further enhancing the cooling effect on the air. Of course, in other embodiments, the body portion 310 may only have one first air passage 311, or the heat dissipation fins 320 may also have a chamber for evaporation of the phase change material.

[0056] Furthermore, in this embodiment, as Figure 5 and Figure 6As shown, the condensing portion 400 is arranged above the body portion 310 and is communicated with the body portion 310 through the throttling pipe 410. Here, the above should be referred to the use state of the head-mounted device, that is, after the user wears the head-mounted device, the condensing portion 400 is above the body portion 310. Thus, after the phase change material condenses into liquid in the chamber of the condensing portion 400, it can flow downward along the throttling pipe 410 to the evaporating portion 300 under the action of gravity, and the condensed liquid can be depressurized and cooled after passing through the throttling pipe 410. When it enters the evaporating portion 300, the heat released when it evaporates is also greater, thereby further improving the heat dissipation effect of the head-mounted device. Of course, in other embodiments, a gas pump structure can also be arranged in the pipeline between the evaporating portion 300 and the condensing portion 400.

[0057] Further, in the present embodiment, as shown in Figure 5 and Figure 6 , the condensing portion 400 is in an arc-shaped structure protruding upward, and the throttling pipe 410 is connected to a position of the condensing portion 400 away from the arc top. Thus, the effect of gravity on the condensed liquid can be improved to make the condensed liquid flow more smoothly to the throttling pipe 410. The throttling pipe 410 can be provided as two, respectively connected to the two sides of the condensing portion 400, to further improve the efficiency of the condensed liquid flowing to the evaporating portion 300. While the condensed liquid flows downward along the throttling pipe 410, the steam generated by the evaporating portion 300 will also rise along the throttling pipe 410. In addition, the throttling pipe 410 is provided as a heat-insulating pipe to avoid heat loss of the phase change material flowing through the heat-insulating pipe. Of course, in other embodiments, a flow channel with a height gradient can also be arranged on the bottom side of the chamber of the condensing portion 400 to facilitate the downward flow of the condensed liquid.

[0058] Further, in the present embodiment, as shown in Figures 1 to 6 , the air outlet 102 is arranged on the upper side of the shell 100, the air inlet 101 is arranged on the lower side of the shell 100, the fan 500 is arranged on the upper side of the heat generating element 200 and connected to the lower side of the body portion 310, and the first air passage 302 is arranged on the upper side of the heat dissipation fin 320. Thus, the heat generating element 200 can be close to the air inlet 101. In the external circulation heat dissipation mode of the head-mounted device, the head-mounted device takes in air from the lower side, directly blows the heat generating element 200, and then takes out air from the upper side, thereby avoiding blowing hot air to the user's face.

[0059] Further, in the present embodiment, as shown in Figure 6 and Figure 7As shown, the heat dissipation fins 320 are provided with a heat insulation pad 430 on the side away from the second air passage 303, and the condensing portion 400 is connected to the heat insulation pad 430. That is, for the heat dissipation fins 320, the side connected to the body portion 310 and the side provided with the first air passage 302 are opposite sides in the up-down direction, and the side provided with the heat insulation pad 430 is opposite to the side where the second air passage 303 is located. Among them, the plurality of heat dissipation fins 320 are in a closed structure on the side provided with the heat insulation pad 430. The condensing portion 400 is connected to the heat dissipation fins 320 through the heat insulation pad 430, so that the condensing portion 400 can be stably supported, and the direct conduction of heat between the condensing portion 400 and the heat dissipation fins 320 is insulated, which is beneficial to guarantee the heat dissipation performance of the phase change assembly.

[0060] Further, in the present embodiment, as shown in Figure 5 and Figure 6 , the upper side of the condensing portion 400 is further connected with a heat dissipation plate 420, and the heat dissipation plate 420 is exposed to the outside of the shell 100. It can be understood that the area of the heat dissipation plate 420 is much larger than the area of the upper surface of the condensing portion 400, so that the heat exchange area of the condensing portion 400 can be increased to improve its convective heat exchange capacity with air, and the heat dissipation plate 420 is exposed to the outside of the shell 100, so that the condensing portion 400 mainly exchanges heat with the air of the external environment, that is, even in the internal circulation heat dissipation mode, the heat of the condensing portion 400 will not have too much influence on the temperature of the heat dissipation air duct. Without loss of generality, as shown in Figures 1 to 4 , the shell 100 is provided with a relief passage 103 adjacent to the air outlet 102, and the heat dissipation plate 420 is engaged in the relief passage 103 to be exposed to the outside of the shell 100, and the heat dissipation plate 420 is provided in an arc-shaped structure corresponding to the condensing portion 400 to realize smooth connection with the shell 100.

[0061] Further, in the present embodiment, as shown in Figure 5 and Figure 7As shown, the phase change assembly further comprises a shutter 330 movably arranged on the heat dissipation fin 320 to have two positions of covering the first air passage 302 and covering the second air passage 303. In this way, driving the shutter 330 to move to the position of covering the first air passage 302 makes the flow path from the first air passage 302 to the air outlet 102 disconnected, and the flow path from the second air passage 303 to the air inlet side of the fan 500 connected, and makes the air inlet 101 in the closed state to make the inner circulation flow path connected, so that the head-mounted device can be switched to the inner circulation heat dissipation mode; driving the shutter 330 to move to the position of covering the second air passage 303 makes the flow path from the second air passage 303 to the air inlet side of the fan 500 disconnected, and the flow path from the first air passage 302 to the air outlet 102 connected, and makes the air inlet 101 in the open state to make the flow path from the air inlet 101 to the air inlet side of the fan 500 connected, so that the outer circulation flow path is connected, and the head-mounted device can be switched to the outer circulation heat dissipation mode. Of course, in other embodiments, the phase change assembly can also comprise two shutters 330 respectively and movably covering the first air passage 302 and the second air passage 303.

[0062] Without loss of generality, the head-mounted device is further provided with a cover (not shown) which can open and close the air inlet 101, and the cover is driven to close or open the air inlet 101 by a motor or manually. The phase change assembly further comprises a power device (such as a motor, not shown) for driving the movement of the shielding piece 330, and the shielding piece 330 is rotatably connected to the output shaft of the power device through a rotating shaft 331, and a torsional spring (not shown) is sleeved on the rotating shaft 331, and two torsional arms of the torsional spring are respectively connected to the output shaft of the power device and the shielding piece 330. When the shielding piece 330 is in the position of covering the first air passage 302, the shielding piece 330 will be clamped on the air outlet 102, and the shielding piece 330 will also close the air outlet 102 when covering the first air passage 302. At this time, the torsional spring is in a natural state, so that the shielding piece 330 can stably cover the first air passage 302 to cut off the flow path between the air passage 301 and the air outlet 102. The rotating shaft 331 is arranged on the side of the second air passage 303, so that when the output shaft of the power device applies a downward pulling force to the shielding piece 330 through the rotating shaft 331, the torsional spring will be elastically deformed, so that the shielding piece 330 rotates relative to the output shaft. The shielding piece 330 is flipped upward to a position that can be pulled downward, and then it can be driven by the power device to move downward to the position of covering the second air passage 303. At this time, under the restoring tendency of the torsional spring, the shielding piece 330 can stably cover the second air passage 303. When the shielding piece 330 needs to return to the position of covering the first air passage 302, the output shaft of the power device pushes the shielding piece 330 upward until the rotating shaft 331 reaches the top of the heat dissipation fin 320, and then the shielding piece 330 is flipped downward under the action of the torsional spring to re-cover the first air passage 302. Of course, in other embodiments, the air inlet 101 can be provided with an openable and closable grille assembly, and the opening and closing of the grille assembly can be driven by a motor or manually to open or close the air inlet 101.

[0063] Further, in the present embodiment, as Figure 7 and Figure 8As shown, the plurality of heat dissipation fins 320 are arranged in convex arc shape on the side where the first air passage 302 is located and the side where the second air passage 303 is located, and the shielding member 330 is correspondingly arc-shaped to be adapted to the side where the first air passage 302 and the side where the second air passage 303 of the plurality of heat dissipation fins 320 are located. On the side where the first air passage 302 is located, the surface of the heat dissipation fin 320 is a planar structure, and the height of the plurality of heat dissipation fins 320 decreases from the middle to both sides, so that the plurality of heat dissipation fins 320 are arranged in convex arc shape, and the same is true on the side where the second air passage 303 is located. The shielding member 330 is correspondingly arc-shaped, and when covering the first air passage 302 and the second air passage 303, it can be fitted with the plurality of heat dissipation fins 320. It can be understood that when the shielding member 330 covers the first air passage 302, it should be engaged in the position of the air outlet 102, and the arc-shaped shielding member 330 can be smoothly connected with the upper side of the arc-shaped shell 100, which is conducive to improving the appearance of the head-mounted device.

[0064] Further, in the present embodiment, as shown in Figure 5 and Figure 6 , the body part 310 and the heat generating element 200 are further connected with a heat pipe 600, the evaporation end of the heat pipe 600 is connected to the heat generating element 200, and the condensation end is connected to the body part 310. In this way, the heat generated by the heat generating element 200 can also be transmitted to the body part 310 through the heat pipe 600, and the heat transfer efficiency of the heat pipe 600 is fast, which is conducive to further improving the heat dissipation and cooling effect of the heat generating element 200.

[0065] Further, in the present embodiment, as shown in Figure 5 and Figure 6As shown, the head-mounted device further comprises a temperature sensor (not shown) for detecting the temperature of the condensing part 400 and a controller 700 capable of controlling the head-mounted device to switch between the inner circulation heat dissipation mode and the outer circulation heat dissipation mode according to the temperature fed back by the temperature sensor. It can be understood that in the inner circulation heat dissipation mode, the evaporation process and the condensation process of the phase change assembly are relatively intense, so that the temperature of the condensing part 400 is relatively high, and when the temperature of the condensing part 400 is transferred to the outside of the shell 100, it is easy to bring bad experience to the user when the user touches. In the embodiment, the temperature of the condensing part 400 is monitored by the temperature sensor, and when the temperature is too high, the controller 700 can control the head-mounted device to switch to the outer circulation heat dissipation mode, in which mode, since the hot air is quickly discharged to the outside environment through the air outlet 102, the evaporation process of the evaporation part 300 is slowed down, and correspondingly, the condensation process of the condensing part 400 is also slowed down, so that the temperature of the condensing part 400 can gradually decrease, and when the temperature of the condensing part 400 decreases to a certain extent, the head-mounted device can be controlled by the controller 700 to switch to the inner circulation heat dissipation mode with better heat dissipation effect.

[0066] Without loss of generality, the temperature sensor is arranged on the heat dissipation plate 420, since the heat dissipation plate 420 is exposed, when the temperature of the heat dissipation plate 420 is too high, the user will be affected by the use experience when accidentally touching, therefore, the temperature of the heat dissipation plate 420 is detected by the temperature sensor, and the controller 700 is electrically connected to the power device driving the shielding piece 330 and the sensor, when the temperature fed back by the sensor is too high (for example, the temperature is higher than 60 degrees), the controller 700 controls the power device to drive the shielding piece 330, so that the shielding piece 330 moves to the position covering the second air passage 303, so that the head-mounted device is switched to the outer circulation heat dissipation mode; when the temperature fed back by the sensor is within a certain range (for example, the temperature is lower than 50 degrees), the controller 700 controls the power device to drive the shielding piece 330, so that the shielding piece 330 moves to the position covering the first air passage 302, so that the head-mounted device is switched to the inner circulation heat dissipation mode.

[0067] The above description is only an optional embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made according to the content of the present application specification and drawings, or direct / indirect application in other related technical fields within the concept of the present application is included in the patent protection scope of the present application.

Claims

1. A head-mounted device, comprising: The application relates to a head-mounted device with a heat dissipation mode. The head-mounted device comprises a shell, a heat-dissipating fan channel, a heat-dissipating fan, a phase-change component and a heat-dissipating fan. The shell is provided with an air inlet, an air outlet and the heat-dissipating fan channel. The heat-dissipating fan channel is connected with the air inlet and the air outlet. The heat-dissipating fan is arranged in the heat-dissipating fan channel. The phase-change component is arranged in the heat-dissipating fan channel and comprises an evaporation part and a condensation part. The condensation part is arranged on the side of the evaporation part far from the heat-dissipating fan. The heat-dissipating fan is arranged between the evaporation part and the heat-dissipating fan. The head-mounted device has an internal circulation heat dissipation mode in which the air inlet and the air outlet are closed and an external circulation heat dissipation mode in which the air inlet and the air outlet are opened. In the internal circulation heat dissipation mode and the external circulation heat dissipation mode, the heat-dissipating fan operates.

2. The head-mounted device of claim 1, wherein, The evaporation part is provided with a wind channel.

3. The head-mounted device of claim 2, wherein, The air inlet side of the wind channel is connected with the air outlet side of the heat-dissipating fan.

4. The head-mounted device of claim 3, wherein, The air outlet side of the wind channel is provided with a first air outlet and a second air outlet.

5. The head-mounted device of claim 2, wherein, In the internal circulation heat dissipation mode, the flow path from the first air outlet to the air outlet is disconnected, and the flow path from the second air outlet to the air inlet side of the heat-dissipating fan is connected, so as to form an internal circulation flow path in the heat-dissipating fan channel.

6. The head-mounted device of claim 5, wherein, In the external circulation heat dissipation mode, the flow path from the second air outlet to the air inlet side of the heat-dissipating fan is disconnected, and the flow path from the air inlet to the air inlet side of the heat-dissipating fan and the flow path from the first air outlet to the air outlet are connected, so as to form an external circulation flow path between the external environment and the heat-dissipating fan channel.

7. The head-mounted device of claim 5, wherein, The internal circulation heat dissipation mode is started when the head-mounted device is in a high-power operation mode.

8. The head-mounted device of claim 7, wherein, The external circulation heat dissipation mode is started when the head-mounted device is in a low-power operation mode. The evaporation part comprises a body part and a plurality of heat-dissipating fins. The body part is arranged on the air outlet side of the heat-dissipating fan. The heat-dissipating fins are arranged on the side of the body part close to the air outlet. The wind channel is formed by the body part and the plurality of heat-dissipating fins. The first air outlet and the second air outlet are formed between the plurality of heat-dissipating fins. The phase-change component further comprises a shielding part. The shielding part is movably arranged on the heat-dissipating fins. The shielding part has two positions of covering the first air outlet and covering the second air outlet. The plurality of heat-dissipating fins are arranged in a convex arc shape on the side of the first air outlet and the side of the second air outlet. The shielding part corresponds to an arc shape and is adapted to the side of the first air outlet and the side of the second air outlet of the plurality of heat-dissipating fins. The condensation part is arranged above the body part and is connected with the body part through a throttling pipe. The condensation part is in an arc structure protruding upwards. The throttling pipe is connected with the condensation part at a position far from the arc top. The air outlet is arranged on the upper side of the shell. The air inlet is arranged on the lower side of the shell. The heat-dissipating fan is arranged on the upper side of the heat-dissipating fan and is connected with the lower side of the body part. The first air outlet is arranged on the upper side of the heat-dissipating fins. The upper side of the condensation part is further connected with a heat-dissipating plate. The heat-dissipating plate is exposed on the outer side of the shell. And / or, a heat insulation pad is arranged on the side of the heat dissipation fins away from the second air passage.

9. The head-mounted device of claim 2, wherein, The air passage includes a first air passage formed in the body part and a second air passage formed between the heat dissipation fins, and a plurality of the first air passages and the second air passages are arranged in a one-to-one correspondence, and a cavity for phase change material evaporation is arranged in the wall of the first air passage; And / or, a heat pipe is further connected between the body part and the heat generating element, the evaporation end of the heat pipe is connected to the heat generating element, and the condensation end is connected to the body part.

10. The head-mounted device of any one of claims 2 to 9, wherein, The head-mounted device further comprises a temperature sensor and a controller, the temperature sensor is used to detect the temperature of the condensation part, and the controller can control the head-mounted device to switch between the internal circulation heat dissipation mode and the external circulation heat dissipation mode according to the temperature fed back by the temperature sensor.

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