Handheld dust collector convenient for heat dissipation

Abstract

The invention relates to the technical field of dust collector manufacturing, in particular to a handheld dust collector convenient for heat dissipation, which comprises a dust collector shell, the dust collector shell comprises a battery cavity and a motor cavity, and the dust collector shell further comprises a support connecting part positioned between the battery cavity and the motor cavity; a heat dissipation channel communicated with the battery cavity and the motor cavity is formed in the supporting connecting part, the heat dissipation channel comprises a first heat dissipation cavity, a second heat dissipation cavity and a third heat dissipation cavity which are communicated with one another, and the volumes of the first heat dissipation cavity, the second heat dissipation cavity and the third heat dissipation cavity are sequentially reduced; air flow exhausted by the motor cavity enters the battery cavity after being compressed step by step through the first heat dissipation cavity, the second heat dissipation cavity and the third heat dissipation cavity, and an air inlet and an air outlet are formed in the two ends of the battery cavity respectively. The battery cavity is cooled through the heat dissipation channel, an additional heat dissipation device does not need to be added, and heat dissipation of the battery pack of the handheld dust collector is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of vacuum cleaner manufacturing, and in particular to a handheld vacuum cleaner that facilitates heat dissipation. Background Art

[0002] A vacuum cleaner is a cleaning tool, mainly used to suck up dust and debris from surfaces such as floors and walls. A vacuum cleaner is usually driven by a motor and powered by a battery pack. The battery pack is an integral unit assembled from multiple battery cells. It has high energy density, long life and is rechargeable, and can provide a stable and long-lasting power supply for the vacuum cleaner.

[0003] The battery pack generates a large amount of heat during the discharge process. If the heat cannot be dissipated in time, the battery pack temperature will be too high, which will affect the performance and life of the battery pack and even cause safety problems.

[0004] Currently, heat dissipation of the battery pack in a vacuum cleaner mainly relies on additional heat dissipation devices, such as fan convection or liquid cooling. Handheld vacuum cleaners are small in size, and the above heat dissipation structure is complex and has high heat dissipation costs, which is not suitable for heat dissipation of the battery pack of a handheld vacuum cleaner.

[0005] Therefore, there is an urgent need for a handheld vacuum cleaner that is easy to dissipate heat and can solve the above problems, so as to facilitate heat dissipation of the battery pack in the handheld vacuum cleaner. Summary of the Invention

[0006] In order to facilitate heat dissipation of a battery pack in a handheld vacuum cleaner, the present application provides a handheld vacuum cleaner that facilitates heat dissipation.

[0007] The present application provides a handheld vacuum cleaner that facilitates heat dissipation, which adopts the following technical solution: A handheld vacuum cleaner that is easy to dissipate heat, includes a vacuum cleaner shell, the vacuum cleaner shell includes a battery chamber and a motor chamber, the vacuum cleaner shell also includes a supporting connection portion located between the battery chamber and the motor chamber, a heat dissipation channel connecting the battery chamber and the motor chamber is provided in the supporting connection portion, the heat dissipation channel includes a first heat dissipation chamber, a second heat dissipation chamber and a third heat dissipation chamber that are connected to each other, the volumes of the first heat dissipation chamber, the second heat dissipation chamber and the third heat dissipation chamber decrease successively, the airflow discharged from the motor chamber enters the battery chamber after being compressed step by step by the first heat dissipation chamber, the second heat dissipation chamber and the third heat dissipation chamber, an air inlet and an air outlet are respectively provided at both ends of the battery chamber, the air inlet is connected to the third heat dissipation chamber, and the air outlet is connected to the outside of the vacuum cleaner shell.

[0008] By adopting the above technical solution, an air flow is generated during the operation of the motor. After the air flow is discharged from the motor cavity, it immediately enters the heat dissipation channel in the support connection part. The air flow in the heat dissipation channel flows through the first heat dissipation cavity, the second heat dissipation cavity and the third heat dissipation cavity in sequence. The volumes of the first heat dissipation cavity, the second heat dissipation cavity and the third heat dissipation cavity decrease in sequence, and the gas is gradually compressed. The pressure of the gas gradually increases, the flow rate gradually increases, and the speed of heat transfer between the gas and the inner wall of the cavity will be faster. The heat generated by the operation of the motor is dissipated in the process of flowing in the first heat dissipation cavity, the second heat dissipation cavity and the third heat dissipation cavity. An air inlet and an air outlet are respectively provided at both ends of the battery cavity. The third heat dissipation cavity is connected to the air inlet. The cooled air flow enters the battery cavity through the air inlet. Because a large amount of heat is generated during the operation of the battery pack, after the air flow enters the battery cavity, the heat generated by the battery pack is taken away by the gas flow and discharged from the air outlet to the environment outside the battery cavity. The ambient temperature in the battery cavity is reduced, thereby ensuring that the battery pack is within the optimal operating temperature range, thereby extending the service life of the battery. Compared with the existing technology, the heat dissipation channel utilizes the airflow generated by the rotation of the motor, and guides it into the battery cavity through the heat dissipation channel, and then dissipates heat and cools the battery pack in the battery cavity. Moreover, the airflow in the heat dissipation channel is gradually compressed due to the setting of the first heat dissipation cavity, the second heat dissipation cavity and the third heat dissipation cavity, so that the flow rate of the airflow is gradually accelerated. The heat generated by the motor originally carried in the airflow is also dissipated in the three heat dissipation cavities, so that the temperature of the airflow entering the battery cavity returns to normal temperature, and dissipates heat to the battery pack after entering the battery cavity. Moreover, the heat dissipation channel is located in the supporting connection part, and there is no need to add additional heat dissipation devices, which is convenient for dissipating heat to the battery pack in the compact handheld vacuum cleaner.

[0009] Optionally, a heat absorbing plate extending along the airflow direction is embedded in the inner wall of the third heat dissipation cavity.

[0010] By adopting the above technical solution, the heat absorption plate on the inner wall of the third heat dissipation cavity can absorb heat from the air flow flowing through the third heat dissipation cavity, perform heat conduction, and transfer the heat carried away by the air flow, so that the temperature of the air flow entering the battery cavity is further reduced.

[0011] Optionally, a shielding member that partially blocks the air inlet is provided on the battery cavity, and a gap is left between the shielding member and the air inlet for air flow to enter the battery cavity, and the opening of the gap is not arranged opposite to the battery pack in the battery cavity.

[0012] By adopting the above technical solution, a shielding member is provided at the air inlet of the battery cavity. The setting of the shielding member prevents the battery pack inside the battery cavity from facing the air inlet. When the battery pack is removed from the vacuum cleaner shell, the shielding member can protect the battery pack and reduce the entry of dust and the like into the battery cavity. A gap is left between the shielding member and the air inlet to ensure that the gas in the third heat dissipation cavity can smoothly enter the battery cavity. The opening direction of the gap is not opposite to the battery pack to prevent the airflow entering the battery cavity from directly hitting the battery pack, so that the airflow entering the battery cavity is in more even contact with the original gas in the battery cavity, thereby facilitating heat exchange between the gases.

[0013] Optionally, there are multiple shielding members, and an air flow opening is left between two adjacent shielding members for air flow to enter the battery cavity. There are multiple air flow openings and they are arranged in sequence along the depth direction of the battery cavity.

[0014] By adopting the above technical solution, the gas entering the battery cavity is prevented from directly hitting the battery pack. The shielding member shields the battery pack from dust. There are multiple air flow openings. After the air flow enters the battery cavity from different air flow openings, the exchange with the air flow in the battery cavity will be more sufficient and uniform.

[0015] Optionally, the longitudinal cross-section of the shielding member is Z-shaped or L-shaped.

[0016] Optionally, the shielding member is a ceramic sheet or a flame-retardant plastic sheet.

[0017] By adopting the above technical solution, the ceramic sheet and the flame-retardant plastic sheet have stable flame-retardant properties, reducing the possibility of flammable substances burning at the air inlet, thereby providing good protection for the battery pack and improving the safety performance of the battery pack.

[0018] Optionally, the third heat dissipation cavity is provided with a pressure relief port which passes through the inside and outside of the vacuum cleaner shell near the air inlet, and the vacuum cleaner shell is provided with an elastic blocking piece which seals the pressure relief port and can open and close the pressure relief port.

[0019] By adopting the above technical solution, when dust blocks the air inlet of the battery cavity, the air flow in the third heat dissipation cavity will be obstructed, resulting in an abnormal increase in the air pressure in the heat dissipation channel. Therefore, a pressure relief port is designed. When the pressure is large enough, the air flow will push open the elastic blocking piece covering the pressure relief port, the pressure relief port is opened, and the gas flows out of the vacuum cleaner housing from the pressure relief port. The pressure relief port can release the excess pressure in the third heat dissipation cavity in time. After the air pressure in the third heat dissipation cavity is balanced with the external air pressure, the elastic blocking piece restores its elastic deformation to seal the pressure relief port, thereby ensuring the air pressure balance in the third heat dissipation cavity.

[0020] Optionally, a cavity communicating with the air outlet is further provided in the vacuum cleaner shell, the cavity is located in the supporting connection part and surrounds the outer peripheral side of the first heat dissipation cavity, and an exhaust port communicating with the cavity is opened on the vacuum cleaner shell.

[0021] By adopting the above technical solution, the cavity is located on the outer peripheral side of the first heat dissipation cavity, and the cavity is connected to the outside world through the exhaust port. The gas in the cavity can transfer heat with the outer peripheral wall of the first heat dissipation cavity. The heat in the first heat dissipation cavity can be transferred to the cavity for partial heat dissipation. The airflow in the battery cavity enters the cavity from the air outlet, and then enters the outside world from the vacuum cleaner shell through the exhaust port.

[0022] Optionally, the motor cavity is provided with an exhaust outlet connected to the first heat dissipation cavity. There are two exhaust outlets, which are symmetrically distributed about the central axis of the first heat dissipation cavity. The cavity shape of the first heat dissipation cavity is a funnel shape that is wide at the top and narrow at the bottom. The exhaust outlet of the motor cavity is located at the top of the first heat dissipation cavity and close to the periphery of the cavity of the first heat dissipation cavity.

[0023] By adopting the above technical solution, the gas enters the first heat dissipation cavity through the two exhaust ports, which facilitates the gas in the motor cavity to quickly enter the first heat dissipation cavity. The cavity shape of the first heat dissipation cavity is funnel-shaped, which is wide at the top and narrow at the bottom. The volume of the first heat dissipation cavity gradually decreases, the pressure gradually increases, the flow rate of the gas in the first heat dissipation cavity gradually increases, the speed of heat transfer between the gas and the inner wall of the cavity of the first heat dissipation cavity will be faster, and the heat of the gas gradually decreases.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. Compared with the existing technology, this heat dissipation channel utilizes the airflow generated by the rotation of the motor and guides it into the battery cavity through the heat dissipation channel, thereby dissipating heat and cooling the battery pack in the battery cavity. Furthermore, the airflow in the heat dissipation channel is gradually accelerated due to the arrangement of the first heat dissipation cavity, the second heat dissipation cavity, and the third heat dissipation cavity. The heat generated by the operation of the motor originally carried in the airflow is also released in the three heat dissipation cavities, thereby restoring the temperature of the airflow entering the battery cavity to normal temperature. After entering the battery cavity, the heat is dissipated from the battery pack. Furthermore, the heat dissipation channel is located within the supporting connection portion, eliminating the need for additional heat dissipation devices, making it easier to dissipate heat from the battery pack in a compact handheld vacuum cleaner. 2. A shield is provided at the air inlet of the battery cavity. The shield prevents the battery pack inside the battery cavity from facing the air inlet. When the battery pack is removed from the vacuum cleaner housing, the shield protects the battery pack and reduces the entry of dust and other particles into the battery cavity. A gap is left between the shield and the air inlet to ensure that the gas from the third heat dissipation cavity can smoothly enter the battery cavity. The opening of the gap is not opposite to the battery pack to prevent the airflow entering the battery cavity from directly hitting the battery pack. This ensures that the airflow entering the battery cavity contacts the existing gas in the battery cavity more evenly, facilitating heat exchange between the gases. 3. When dust blocks the air inlet of the battery cavity, the airflow in the third heat dissipation cavity will be obstructed, causing the air pressure in the heat dissipation channel to increase abnormally. Therefore, a pressure relief vent is designed. When the pressure is large enough, the airflow will push open the elastic blocking piece covering the pressure relief vent. The pressure relief vent is opened, and the gas flows out of the vacuum cleaner casing from the pressure relief vent. The pressure relief vent can release the excess pressure in the third heat dissipation cavity in time. After the air pressure in the third heat dissipation cavity is balanced with the external air pressure, the elastic blocking piece returns to its original state and seals the pressure relief vent to ensure the air pressure balance in the third heat dissipation cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of Example 1 of the present application; Figure 2 This is a schematic diagram of the partial structure of Example 1 of the present application; Figure 3 This is a partial cross-section of Example 1 of the present application Figure 1 , used to show the positional relationship of the two exhaust vents being symmetrically distributed about the central axis of the first heat dissipation cavity; Figure 4 This is a partial cross-section of Example 1 of the present application Figure 2 , used to show the flow path of the airflow in the vacuum cleaner housing; Figure 5 for Figure 4 The enlarged schematic diagram of the middle part A is used to show the state of airflow passing through the Z-shaped shielding member; Figure 6 for Figure 5 The enlarged schematic diagram of the middle part B is used to show the specific position of the Z-shaped shielding member; Figure 7 This is a partial cross-sectional view of Example 2 of the present application, used to illustrate the state of airflow passing through the L-shaped shielding member; Figure 8 This is a partial cross-sectional view of Example 3 of the present application, used to illustrate the state of airflow passing through adjacent transverse sections; Figure 9 for Figure 8 The enlarged schematic diagram of the middle C part is used to show the specific position of the L-shaped shielding member.

[0026] Figure numerals: 1. Vacuum cleaner shell; 2. Dust bucket; 3. Handle; 4. Motor seat; 5. Base; 6. Battery cavity; 7. Motor cavity; 8. Support connection part; 9. Heat dissipation channel; 10. First heat dissipation cavity; 11. Second heat dissipation cavity; 12. Third heat dissipation cavity; 13. Air inlet; 14. Air outlet; 15. Heat absorbing plate; 16. Shielding member; 17. Gap; 18. Air flow outlet; 19. Pressure relief vent; 20. Elastic blocking plate; 21. Cavity; 22. Exhaust port; 23. Exhaust port; 24. Vertical section; 25. Horizontal section. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-9 This application is described in further detail.

[0028] Example 1: A handheld vacuum cleaner that is easy to dissipate heat, reference Figure 1 and Figure 2 The vacuum cleaner housing 1 includes a dust collecting bucket 2, a motor seat 4, a base 5 and a handle 3. The motor seat 4 is provided with a motor cavity 7, which is used to install and place the motor. Figure 4 A battery cavity 6 is provided in the base 5, and the battery cavity 6 is used to install the battery pack. A support connecting part 8 is fixedly installed between the motor seat 4 and the base 5. The support connecting part 8 is integrated with the vacuum cleaner housing 1. The support connecting part 8 is used to connect the motor seat 4 and the base 5. A heat dissipation channel 9 is provided in the support connecting part 8, and the motor cavity 7 is connected to the battery cavity 6 through the heat dissipation channel 9.

[0029] refer to Figure 3 and Figure 4 The gas generated by the motor during operation enters the motor cavity 7, which is provided with two exhaust ports 23. The gas enters the heat dissipation channel 9 through the two exhaust ports 23 and then Figure 5 The heat dissipation channel 9 includes a first heat dissipation cavity 10, a second heat dissipation cavity 11, and a third heat dissipation cavity 12 through which the air flows in sequence. The gas in the motor cavity 7 first enters the first heat dissipation cavity 10 through the exhaust port 23. The two exhaust ports 23 accelerate the gas in the motor cavity 7 to enter the first heat dissipation cavity 10. The exhaust ports 23 are symmetrically distributed about the central axis of the first heat dissipation cavity 10, thereby ensuring that the pressure of the gas entering the first heat dissipation cavity 10 is more stable. The cavity shape of the first heat dissipation cavity 10 is funnel-shaped, which is wide at the top and narrow at the bottom. This makes the top opening of the first heat dissipation cavity 10 larger, which can accelerate the gas from entering the first heat dissipation cavity 10. The volume of the first heat dissipation cavity 10 gradually decreases from the direction of the airflow, thereby gradually increasing the pressure of the gas in the first heat dissipation cavity 10 and the flow rate of the gas. The speed of heat transfer between the gas and the inner wall of the cavity of the first heat dissipation cavity 10 will be faster, and the gas transfers more heat, so the temperature of the gas in the first heat dissipation cavity 10 gradually decreases.

[0030] refer to Figure 4 and Figure 5 The volumes of the first heat dissipation cavity 10, the second heat dissipation cavity 11, and the third heat dissipation cavity 12 decrease in sequence. The gas passes through the first heat dissipation cavity 10, the second heat dissipation cavity 11, and the third heat dissipation cavity 12 and is compressed in sequence. During the compression of the gas, the pressure of the gas gradually increases, thereby increasing the flow rate of the airflow step by step. The heat transfer between the gas and the inner wall of the heat dissipation channel 9 is faster, and the heat transfer of the gas is faster, thereby making the gas cool down faster, which is convenient for subsequent cooling of the battery cavity 6.

[0031] refer to Figure 5 and Figure 6 The third heat dissipation cavity 12 is embedded with a heat absorbing plate 15, which is extended along the direction of air flow. Figure 4 , an embedding groove running through the inside and outside of the third heat dissipation cavity 12 is opened on the vacuum cleaner shell 1, and the heat absorbing plate 15 is fixed on the embedding groove by embedding and fixing, and the embedding position corresponds to the third heat dissipation cavity 12, and the heat absorbing plate 15 is made of heat-absorbing material. In this embodiment, the material of the heat absorbing plate 15 is copper, and copper has the performance of fast heat absorption and fast heat conduction. The heat absorbing plate 15 is set as a copper plate, which can quickly absorb heat from the gas flowing through it. One side of the heat absorbing plate 15 is located in the third heat dissipation cavity 12, and the other side is exposed to the external environment. After absorbing heat, the heat absorbing plate 15 can quickly conduct the heat to the external environment at the same time, so that the gas flowing through the third heat dissipation channel 9 can dissipate heat efficiently, further improving the cooling effect of the gas in the third heat dissipation cavity 12.

[0032] refer to Figure 5 and Figure 6 One end of the battery cavity 6 is provided with an air inlet 13, and a shielding member 16 is provided at the air inlet 13 of the battery cavity 6 to partially block the air inlet 13. The shielding member 16 is a ceramic sheet or a flame-retardant plastic sheet to ensure that the shielding member 16 has a stable flame-retardant effect. The shielding member 16 is fixed at the air inlet 13 of the battery cavity 6 by embedding and fixing. A gap 17 is left between the shielding member 16 and the air inlet 13 to ensure that the gas enters the battery smoothly from the gap 17. The setting of the shielding member 16 plays a role in blocking dust. Figure 2 To prevent dust from entering the battery cavity 6 from the air inlet 13 after the base 5 is removed from the supporting connection part 8, thereby affecting the normal operation of the battery pack, the longitudinal cross-section of the shielding member 16 is Z-shaped, so that there are multiple air flow openings 18 on the shielding member 16. The air flow openings 18 are arranged on the inner wall of the third heat dissipation cavity 12 on the side close to the battery cavity 6, and the air flow openings 18 are evenly distributed along the length direction of the battery cavity 6. The multiple air flow openings 18 facilitate gas to enter the battery cavity 6 from different directions and contact the gas in the battery cavity 6, so that the heat transfer between the high-temperature gas and the low-temperature gas is more sufficient.

[0033] refer to Figure 5 and Figure 6 The third heat dissipation cavity 12 is provided with a pressure relief port 19 on the inner wall thereof. Figure 4 After the air pressure in the third heat dissipation chamber 12 is balanced with the external air pressure, the elastic barrier sheet 20 returns to its original state and seals the pressure relief port 19, thereby ensuring that the air pressure in the third heat dissipation chamber 12 is balanced.

[0034] refer to Figure 2 and Figure 5 An air outlet 14 is provided at the other end of the battery cavity 6, and the air outlet 14 is connected to the vacuum cleaner housing 1. The gas discharged from the motor cavity 7 is cooled down after heat transfer with the heat dissipation channel 9. The airflow enters the battery cavity 6 through the air inlet 13 after cooling. The temperature of the cooled airflow is close to normal temperature. A large amount of heat will be generated during the operation of the battery pack. The temperature inside the battery cavity 6 is higher than the temperature of the airflow entering from the air inlet 13. The airflow will take away the heat inside the battery cavity 6 during the process of flowing through the battery cavity 6. The temperature inside the battery pack is reduced, so that the battery pack works at normal temperature, thereby extending the service life of the battery. The gas after heat transfer is discharged from the air outlet 14 on the battery pack into the vacuum cleaner housing 1.

[0035] refer to Figure 4 and Figure 5 The vacuum cleaner housing 1 is provided with a cavity 21 connected to the air outlet 14, and the vacuum cleaner housing 1 is provided with an exhaust port 22. The gas in the battery cavity 6 enters the cavity 21 from the air outlet 14 after heat transfer, and is then discharged from the vacuum cleaner housing 1 through the exhaust port 22. Figure 2 The cavity 21 is located in the supporting connection part 8 and surrounds the outer periphery of the first heat dissipation cavity 10. The cavity wall between the first heat dissipation cavity 10 and the cavity 21 is relatively thin, which helps to transfer the heat of the first heat dissipation cavity 10 to the outside, thereby further cooling the gas in the first heat dissipation cavity 10.

[0036] The implementation principle of Example 1 of the present application is as follows: the air flow generated by the motor enters the motor cavity 7, and then enters the first heat dissipation cavity 10 from the motor cavity 7 through the exhaust port 23. The volumes of the first heat dissipation cavity 10, the second heat dissipation cavity 11, and the third heat dissipation cavity 12 gradually decrease, the flow rate of the gas increases, the gas transfers more heat, and the temperature decreases accordingly. The cooled gas enters the battery cavity 6 from the air inlet 13, and the entering gas transfers heat with the gas in the battery cavity 6, and the temperature in the battery cavity 6 decreases. The longitudinal cross-section of the shielding member 16 is Z-shaped, so that the shielding member 16 has air flow ports 18 in different directions, which facilitates the gas to enter the battery cavity 6 from different angles and transfer heat with the gas in the battery cavity 6, and the cooling effect of the battery cavity 6 is further enhanced. After the heat transfer, the gas enters the cavity 21 from the air outlet 14, and the gas in the first heat dissipation cavity 10 is further cooled through the outer peripheral side of the first heat dissipation cavity 10, and then discharged from the vacuum cleaner shell 1 into the outside world through the exhaust port 22.

[0037] Example 2: refer to Figure 7 , a handheld vacuum cleaner that is easy to dissipate heat, which is different from Example 1 in that, in this embodiment, the longitudinal cross-section of the shielding member 16 is L-shaped.

[0038] The implementation principle of Example 2 of the present application is: the longitudinal cross-section of the shielding member 16 is L-shaped, and the L-shaped shielding member 16 makes the size of the air flow opening 18 larger than the air flow opening 18 of the Z-shaped shielding member 16, thereby accelerating the entry of gas into the battery cavity 6, and further enhancing the cooling effect of the battery cavity 6.

[0039] Example 3: refer to Figure 8 and Figure 9 , a handheld vacuum cleaner that is easy to dissipate heat. The difference from Example 1 is that, in this embodiment, the shielding member 16 includes an integrally formed vertical section 24 and a transverse section 25. In the length direction of the battery cavity 6, the length of the vertical section 24 gradually decreases, and there is a height difference between adjacent transverse sections 25. The airflow flows out from between adjacent transverse sections 25 along the length direction of the battery cavity 6.

[0040] The implementation principle of Example 3 of the present application is: the length of the vertical section 24 gradually decreases from the depth direction of the battery cavity 6, so that there is a height difference between adjacent transverse sections 25, and the air flow flows out from between the adjacent transverse sections 25 along the length direction of the battery cavity 6. When the air flow flows out from the transverse section 25, it will not be blocked by the adjacent shielding member 16, thereby accelerating the flow of air to take away the heat in the battery cavity 6.

[0041] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A handheld vacuum cleaner that facilitates heat dissipation, comprising a vacuum cleaner housing (1), wherein the vacuum cleaner housing (1) comprises a battery chamber (6) and a motor chamber (7), and is characterized in that: The vacuum cleaner housing (1) further comprises a supporting connection portion (8) located between the battery chamber (6) and the motor chamber (7); a heat dissipation channel (9) communicating with the battery chamber (6) and the motor chamber (7) is provided in the supporting connection portion (8); the heat dissipation channel (9) comprises a first heat dissipation chamber (10), a second heat dissipation chamber (11), and a third heat dissipation chamber (12) which are connected to each other; the volumes of the first heat dissipation chamber (10), the second heat dissipation chamber (11), and the third heat dissipation chamber (12) decrease in sequence; the airflow discharged from the motor chamber (7) enters the battery chamber (6) after being compressed step by step by the first heat dissipation chamber (10), the second heat dissipation chamber (11), and the third heat dissipation chamber (12); an air inlet (13) and an air outlet (14) are respectively provided at both ends of the battery chamber (6); the air inlet (13) is communicated with the third heat dissipation chamber (12), and the air outlet (14) is communicated with the outside of the vacuum cleaner housing (1).

2. The handheld vacuum cleaner for facilitating heat dissipation according to claim 1, characterized in that: A heat absorbing plate (15) extending along the airflow direction is embedded in the inner wall of the third heat dissipation cavity (12).

3. The handheld vacuum cleaner for facilitating heat dissipation according to claim 1, characterized in that: The battery cavity (6) is provided with a shielding member (16) that partially blocks the air inlet (13); a gap (17) is left between the shielding member (16) and the air inlet (13) for airflow to enter the battery cavity (6); the opening of the gap (17) is arranged in a direction not opposite to the battery pack in the battery cavity (6).

4. The handheld vacuum cleaner for facilitating heat dissipation according to claim 3, characterized in that: There are a plurality of shielding members (16), and an airflow opening (18) for airflow to enter the battery cavity (6) is left between two adjacent shielding members (16). There are a plurality of airflow openings (18) and they are arranged in sequence along the depth direction of the battery cavity (6).

5. The handheld vacuum cleaner for facilitating heat dissipation according to claim 4, characterized in that: The shielding member (16) has a longitudinal cross-sectional shape of a Z shape or an L shape.

6. The handheld vacuum cleaner for facilitating heat dissipation according to claim 3, characterized in that: The shielding member (16) is a ceramic sheet or a flame-retardant plastic sheet.

7. The handheld vacuum cleaner for facilitating heat dissipation according to claim 3, characterized in that: The third heat dissipation cavity (12) is provided with a pressure relief port (19) that penetrates inside and outside the vacuum cleaner housing (1) near the air inlet (13); the vacuum cleaner housing (1) is provided with an elastic blocking piece (20) that seals the pressure relief port (19) and can open and close the pressure relief port (19).

8. The handheld vacuum cleaner for facilitating heat dissipation according to claim 1, characterized in that: A cavity (21) communicating with the air outlet (14) is further provided in the vacuum cleaner housing (1); the cavity (21) is located in the supporting connection portion (8) and surrounds the outer periphery of the first heat dissipation cavity (10); and an exhaust port (22) communicating with the cavity (21) is provided on the vacuum cleaner housing (1).

9. The handheld vacuum cleaner for facilitating heat dissipation according to claim 1, characterized in that: The motor cavity (7) is provided with an exhaust port (23) communicating with the first heat dissipation cavity (10), two exhaust ports (23) are provided and are symmetrically distributed about the central axis of the first heat dissipation cavity (10), the cavity shape of the first heat dissipation cavity (10) is funnel-shaped, wide at the top and narrow at the bottom, and the exhaust port (23) of the motor cavity (7) is located at the top of the first heat dissipation cavity (10) and close to the cavity periphery of the first heat dissipation cavity (10).

Images