Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
  • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
  • F24F1/20—Electric components for separate outdoor units
  • F24F1/24—Cooling of electric components
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F11/00—Control or safety arrangements
  • F24F11/89—Arrangement or mounting of control or safety devices
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
  • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
  • F24F1/20—Electric components for separate outdoor units
  • F24F1/22—Arrangement or mounting thereof

Definitions

• the present application relates to the technical field of air conditioning, in particular to an electric control box, an outdoor unit of an air conditioner and an air conditioner.
• the electric control box of the outdoor unit of the air conditioner is usually installed in the compressor chamber to separate from the heat exchange chamber where the condenser is located, so as to prevent water and foreign matter from entering the electric control box.
• the air conditioner compressor and electrical components are in a relatively closed space, the compressor and electrical components will generate a lot of heat when the air conditioner is running, which will cause the heat of the electric control box to be unable to be dissipated effectively, which will easily affect the overall
• the normal operation of the electronic control system will shorten the life of components and parts, and there are also major safety hazards.
• the main purpose of this application is to propose an electric control box, aiming at improving the heat dissipation effect of the electric control box.
• the electric control box proposed by this application is used for the outdoor unit of the air conditioner, the outdoor unit of the air conditioner is provided with a heat exchange chamber, and the electric control box includes:
• the box body is provided with an installation cavity and a heat dissipation cavity arranged outside the installation cavity, the box body is provided with an installation port for communicating with the heat dissipation cavity and the heat exchange cavity, and the installation cavity is used for installing electrical components ;as well as
• the radiator includes a heat conduction part and a heat dissipation part arranged on the heat conduction part, the heat conduction part is connected to the box body, and is used for heat transfer connection with the electrical device in the installation cavity, and the heat dissipation part is arranged on the at the installation opening, and at least partly located in the cooling chamber;
• the box body is also provided with a first air outlet and a second air outlet, both of which are connected to the air inlet side of the heat dissipation part.
• the first air outlet is arranged closer to the heat conducting part than the second air outlet, so as to The airflow is guided to an end of the heat dissipation part close to the heat conduction part, and the second air outlet is used to guide the airflow to an end of the heat dissipation part away from the heat conduction part.
• the box body is provided with a partition between the heat dissipation chamber and the installation chamber, and the first air outlet is provided on the partition to communicate with the installation chamber and the installation chamber.
• the heat dissipation cavity is described.
• the installation chamber is provided with an air inlet, and the air inlet is used to communicate with the compressor chamber of the outdoor unit of the air conditioner, and the side of the partition facing the installation chamber is provided with a guide wall. wall, the diversion surrounding wall and the partition form a diversion channel, one end of the diversion channel communicates with the first air outlet, and the other end extends toward the air inlet.
• the cross-sectional area of the air guide channel gradually increases in a direction approaching the air inlet.
• the guide wall has a top wall opposite to the partition, and the distance between the top wall and the partition gradually increases in the direction close to the air inlet. .
• the lower edge of the first air outlet away from the heat conduction portion extends obliquely toward the heat sink in a direction from the heat dissipation portion toward the heat conduction portion.
• the second air outlet is arranged between the partition plate and the air inlet side of the heat dissipation part, and is used to communicate with the compressor chamber of the outdoor unit of the air conditioner.
• the present application also proposes an outdoor unit of an air conditioner, including an outer unit casing and the above-mentioned electric control box, the electric control box is installed in the outer unit casing, and the outer unit casing is provided with a heat exchange chamber, so The cooling chamber of the electric control box communicates with the heat exchange chamber through the installation port.
• an outdoor fan is arranged in the heat exchange chamber, and the installation port communicates with a negative pressure side of the outdoor fan.
• the present application also proposes an air conditioner, including the above-mentioned air conditioner outdoor unit.
• the technical solution of the present application provides a first air outlet and a second air outlet connected to the air inlet side of the heat dissipation part on the box body, and arranges the first air outlet closer to the heat conduction part than the second air outlet. Since the first air outlet is closer to the heat conduction part than the second air outlet, the air flow from the first air outlet to the heat dissipation part can flow to the end of the heat dissipation part close to the heat conduction part as much as possible, and flow from the second air outlet to the heat dissipation part The airflow can flow to the end of the heat dissipation part away from the heat conduction part as much as possible, and the airflow flowing from the first air passage to the heat dissipation part and the airflow from the second air passage to the heat dissipation part can also flow to the part between the two ends of the heat dissipation part.
• the integrated airflow can act on the part of the heat dissipation part close to the heat conduction part and the part away from the heat conduction part at the same time through the first air outlet, which increases the airflow flow through the heat dissipation part and increases the exchange between the air flow and the heat dissipation part. thermal area.
• the end of the heat dissipation part close to the heat conduction part is the position with the highest temperature on the heat dissipation part.
• Fig. 1 is a sectional view of an embodiment of the electric control box of the present application
• Fig. 2 is a sectional view of the electric control box installed in the casing of the external machine in Fig. 1;
• FIG. 3 is an enlarged view of A in FIG. 2 .
• the directional indication is only used to explain the relationship between the components in a certain posture. If the specific posture changes, the directional indication will also change accordingly.
• the outdoor unit of an air conditioner includes an outer machine casing, an outdoor fan, an outdoor heat exchanger and a compressor assembly.
• the outer machine casing has a heat exchange chamber and a compressor
• the machine chamber, the outdoor fan and the outdoor heat exchanger are arranged in the heat exchange chamber, and the compressor assembly is arranged in the compressor chamber.
• the electric control box 100 includes a box body 10 and a radiator 20, the box body 10 is provided with an installation cavity 11 and a heat dissipation cavity 12 outside the installation cavity 11, the box The main body 10 is provided with an installation opening 133 for communicating with the heat dissipation chamber 12 and the heat exchange chamber 32 , and the installation chamber 11 is used for installing electrical components.
• the box body 10 can be installed in the compressor cavity 31 , and can also be arranged above the compressor cavity 31 .
• the heat sink 20 includes a heat conduction part 21 and a heat dissipation part 22 arranged on the heat conduction part 21.
• the heat conduction part 21 is connected to the box body 10 and is used for heat transfer and connection with the electrical components in the installation cavity 11.
• the heat dissipation part 22 is provided at the installation port 133 , and at least partly located in the cooling chamber 12.
• the airflow can flow through the heat dissipation part 22. When the airflow flows through the heat dissipation part 22, when the temperature of the airflow is lower than the temperature of the heat dissipation part 22, the airflow can perform heat exchange with the heat dissipation part 22, thereby taking away the heat conduction part 21 and passing it to the heat dissipation part 22 of heat.
• the box body 10 is also provided with a first air outlet 131 and a second air outlet 132 which are both connected to the air inlet side of the heat dissipation part 22.
• the first air outlet 131 is arranged closer to the heat conducting part 21 than the second air outlet 132 to guide the air flow.
• the heat dissipation part 22 is close to one end of the heat conduction part 21 , and the second air outlet 132 is used to guide the airflow to the end of the heat dissipation part 22 away from the heat conduction part 21 .
• the air inlet side of the heat dissipation part 22 is the side where the air flow without heat exchange on the heat dissipation part 22 flows in; The side where the heated air flows out.
• the heat dissipation part 22 has a heat dissipation air duct, and the air intake side of the heat dissipation part 22 is the air intake side of the heat dissipation air duct. 22 for heat exchange to take away the heat transferred from the heat conduction portion 21 to the heat dissipation portion 22 .
• the structure of the heat dissipation part 22 can be various.
• the heat dissipation part 22 includes a plurality of heat dissipation fins arranged at intervals, and the plurality of heat dissipation fins are all connected to the heat conduction part 21.
• a cooling air duct is formed between the fins.
• the heat dissipation portion 22 may also be in a grid shape or a structure composed of several criss-cross metal wires.
• the negative pressure generated by the outdoor fan at the radiator 20 can be used to drive the airflow to flow through the heat dissipation part 22 from the first air outlet 131 and the second air outlet 132 .
• An additional fan may also be provided to drive the air flow through the first air outlet 131 and the second air outlet 132 to flow through the heat dissipation portion 22 .
• the air flow from the first air outlet 131 to the heat dissipation portion 22 can flow to the end of the heat dissipation portion 22 close to the heat conduction portion 21 as much as possible, and from the The airflow from the second air passage 132 to the heat dissipation part 22 can flow to the end of the heat dissipation part 22 away from the heat conduction part 21 as much as possible, and the airflow from the first air passage 131 to the heat dissipation part 22 and the airflow from the second air passage 132 to the heat dissipation part 22 The airflow may also flow to the portion between the two ends of the heat dissipation portion 22 .
• the technical solution of the present application provides the box body 10 with a first air outlet 131 and a second air outlet 132 that are both connected to the air inlet side of the heat dissipation part 22, and the first air outlet 131 is closer to the heat conduction part than the second air outlet 132 21 settings.
• the air flow from the first air outlet 131 to the heat dissipation portion 22 can flow to the end of the heat dissipation portion 22 close to the heat conduction portion 21 as much as possible, and from The airflow from the second air passage 132 to the heat dissipation part 22 can flow to the end of the heat dissipation part 22 away from the heat conduction part 21 as much as possible, and the airflow from the first air passage 131 to the heat dissipation part 22 and the airflow from the second air passage 132 to the heat dissipation part 22 The airflow may also flow to the portion between the two ends of the heat dissipation portion 22 .
• the comprehensive air flow can act on the part of the heat dissipation part 22 close to the heat conduction part 21 and the part far from the heat conduction part 21 at the same time through the first air outlet 131, which increases the airflow flow through the heat dissipation part 22 and increases the The heat exchange area of the air flow and the heat dissipation part 22 .
• the end of the heat dissipation part 22 near the heat conduction part 21 is the position with the highest temperature on the heat dissipation part 22, by making the airflow flowing from the first air outlet 131 to the heat dissipation part 22 directly flow to the end of the heat dissipation part 22 close to the heat conduction part 21, it can be better like this To dissipate heat at the position with the highest temperature on the heat dissipation portion 22 , that is, the technical solution of the present application can greatly improve the heat dissipation effect of the electric control box 100 .
• the box body 10 is provided with a partition 14 between the heat dissipation chamber 12 and the installation chamber 11 , and the first air outlet 131 is provided on the partition 14 to communicate with the installation chamber 11 and the heat dissipation chamber 12 . That is, the cooling cavity 12 and the installation cavity 11 are separated by the partition plate 14.
• the air flow can first flow into the installation cavity 11, and then flow from the first air passage 131 to the heat dissipation portion 22, so that the air flow During the process of flowing through the installation cavity 11 , part of the heat in the installation cavity 11 can be taken away by the air flow, which is beneficial to improve the heat dissipation effect in the installation cavity 11 .
• the first air outlet 131 can also be provided on the cavity wall adjacent to the partition plate 14 of the heat dissipation cavity 12, so as to directly communicate with the compressor cavity 31 or directly communicate with the external machine. The space outside the shell 30.
• the installation chamber 11 is provided with an air inlet 135, and the air inlet 135 is used to communicate with the compressor chamber 31 of the outdoor unit of the air conditioner.
• the flow surrounding wall 15 and the partition plate 14 enclose to form a flow guide channel 16 , one end of the flow guide channel 16 communicates with the first air outlet 131 , and the other end extends toward the air inlet 135 .
• the heat dissipation part 22 and the heat conduction part 21 are distributed along the vertical direction, and the first air outlet 131 and the second air outlet 132 are distributed along the up and down direction.
• the air inlet 135 is disposed on the bottom wall 111 of the first cavity.
• the guide channel 16 is formed by enclosing the part of the partition plate 14 located at the lower side of the first air outlet 131 . That is, the air guiding channel 16 is inclined relative to the up-down direction, so that one end of the air guiding channel 16 faces the end of the heat dissipation portion 22 close to the heat conducting portion 21 , and the other end of the air guiding channel 16 faces the air inlet 135 .
• the compressor chamber 31 does not have an outdoor heat exchanger (condenser)
• the temperature of the compressor chamber 31 is lower than that of the heat exchange chamber 32 provided with an outdoor heat exchanger.
• the airflow radiates heat to the radiator 20, and the heat dissipation effect is better.
• this can reduce the possibility of external water vapor entering the electric control box 100 and ensure the electrical safety of the electric control box 100 .
• the present application is not limited thereto.
• the heat dissipation portion 22 and the heat conduction portion 21 , the first air outlet 131 and the second air outlet 132 may all extend along the transverse direction.
• the air inlet 135 can also be directly connected to the space outside the outer machine casing 30, for example, the air inlet 135 can be directly connected to the space outside the outer machine casing 30 through a ventilation duct; or the box body 10 can be set to When the part with the air inlet 135 is attached to the outer casing 30 , the outer casing 30 is provided with a through hole;
• the cross-sectional area of the air guiding channel 16 increases gradually in a direction approaching the air inlet 135 . That is, the size of the end of the air guide channel 16 near the air inlet 135 is larger than the size of the first air outlet 131, and the size of the air guide channel 16 gradually increases in the direction close to the air inlet 135, that is, the air guide channel 16 has a horn shape. mouth structure.
• the flow velocity of the airflow can gradually increase, so that the flow velocity of the airflow to the heat dissipation part 22 is higher, and the heat dissipation effect of the heat dissipation part 22 is further improved.
• the present application is not limited thereto, and in other embodiments, the sizes of the guide channels 16 are equal everywhere.
• the air guide wall 15 has a top wall 151 opposite to the partition 14 , and the distance between the top wall 151 and the partition 14 gradually increases toward the air inlet 135 .
• the diversion wall 15 also has two side walls 152, the upper end of the top wall 151 is connected to the upper edge of the first air outlet 131, the lower end of the top wall 151 extends toward the air inlet 135, and the two sides Surrounding walls 152 are respectively arranged on two opposite sides of the first air outlet 131 in the transverse direction, and are connected between the top surrounding wall 151 and the partition 14, that is, the partition 14, the top surrounding wall 151 and the two side surrounding walls 152 are jointly enclosed. Combined to form the guide channel 16.
• the top surrounding wall 151 and the partition plate 14 at least the top surrounding wall 121 extends obliquely in a direction away from the heat sink 20 in a direction from the heat dissipation portion 22 to the heat conduction portion 21 .
• Such setting while ensuring that the cross-sectional area of the air guide channel 16 gradually increases in the direction close to the air inlet 135, can ensure that the end of the air guide channel 16 away from the first air outlet 131 extends toward the air inlet 135, so that the air inlet
• the tuyeres 135 , the flow guiding channel 16 and the end of the heat dissipation portion 22 close to the heat conduction portion 21 are substantially located on a straight line.
• the present application is not limited thereto.
• the top surrounding wall 151 and the partition plate 14 may also be parallel, and the distance between the two side surrounding walls 152 gradually increases toward the air inlet 135 .
• the distance between the top surrounding wall 151 and the partition 14 gradually increases toward the air inlet 135
• the distance between the two side surrounding walls 152 gradually increases toward the air inlet 135 .
• the lower edge of the first air outlet 131 away from the heat conduction portion 21 extends obliquely toward the heat sink 20 in the direction from the heat dissipation portion 22 to the heat conduction portion 21 .
• the lower edge of the first air outlet 131 away from the heat conduction portion 21 is the part of the partition 14 between the first air outlet 131 and the bottom wall 111 of the first chamber, that is, the part of the partition 14 located at the second A portion between the air outlet 131 and the bottom wall 111 of the first cavity extends obliquely toward the radiator 20 in the direction from the heat dissipation portion 22 to the heat conduction portion 21 .
• Such setting can reduce the angle between the part of the partition plate 14 located between the first air outlet 131 and the bottom wall 111 of the first chamber and the air inlet 135 in the direction of the first air outlet 131 , so that when the flow guide wall 15 When the guide channel 16 is formed by enclosing the part of the partition plate 14 between the first air outlet 131 and the first chamber bottom wall 111, the portion of the partition plate 14 located between the first air outlet 131 and the first chamber bottom wall 111 can be reduced.
• the part between 111 blocks the airflow, but the air inlet 135 flows into the guide channel 16 to better guide the first air outlet 131, which can further reduce the loss of the airflow from the air inlet 135 to the heat dissipation part 22, ensuring Both the velocity and the flow rate of the air flow toward the end of the heat dissipation portion 22 close to the heat conduction portion 21 are relatively large.
• the second air outlet 132 is disposed between the partition plate 14 and the air inlet side of the heat dissipation portion 22 and used to communicate with the compressor chamber 31 of the outdoor unit of the air conditioner.
• the heat dissipation cavity 12 has a second cavity bottom wall 121, the second cavity bottom wall 121 is connected to the lower end of the partition 14, and the second air outlet 132 is arranged on the second cavity bottom wall 121, and is located between the partition 14 and the heat sink. Between the air inlet side of the part 22.
• the installation opening 133 is located on the side of the bottom wall 121 of the second cavity away from the partition 14 , that is, the installation opening 133 is opposite to the partition 14 , and the heat dissipation portion 22 is at least partly located above the bottom wall 121 of the second cavity.
• Such setting can make the airflow flowing from the first air outlet 131 to the radiator 20 after passing through the installation cavity 11 and the airflow directly flowing from the second air outlet 132 to the radiator 20 in the compressor chamber 31 to be relatively independent, which can ensure that the first air outlet Both 131 and the second air outlet 132 have a large amount of airflow flowing to the radiator 20 to improve the heat dissipation effect.
• the second air outlet 132 may also be directly connected to the space outside the outer machine casing 30 .
• the cavity wall of the cooling cavity 12 is provided with a fixed opening 134, and the fixed opening 134 communicates with the installation cavity 11, and the heat conduction part 21 is provided at the installation opening 133 to be exposed in the installation cavity 11, so that the heat conduction is fixed through the fixed opening 134. At the same time, it also facilitates the heat transfer connection between the heat conduction portion 21 and the electrical device in the installation cavity 11 .
• the heat conduction part 21 can be clamped to the fixed opening 134 through a snap-fit structure; or, the heat conduction part 21 can be screwed to the fixed opening 134 ; or the heat conduction part 21 can be bonded to the fixed opening 134 .
• the present application is not limited thereto.
• the cavity wall of the installation cavity 11 can also be set as a heat-conducting structure (for example, the material is a metal with good heat conduction such as copper), and the heat-conducting part 21 is bonded to the heat-conducting structure.
• the electrical components in cavity 11 are thermally connected to the heat conducting structure.
• the cooling cavity 12 has a cavity top wall 122, the cavity top wall 122 is opposite to the second cavity bottom wall 121 and arranged at intervals, the cavity top wall 122 is connected to the upper end of the partition plate 14, and the installation cavity 11 extends to the cavity top.
• the cavity top wall 122 is provided with a fixed opening 134 . That is, the heat dissipation portion 22 extends from the cavity top wall 122 to the second cavity bottom wall 121 .
• the electrical components in the installation cavity 11 can be connected to the heat conduction portion 21 by extending above the fixed opening 134 through the heat conduction structure, or some electrical components can be placed above the heat conduction portion 21 to facilitate the arrangement of the electrical components in the installation cavity 11 .
• the present application also proposes an outdoor unit of an air conditioner, which includes an outer unit casing 30 and an electric control box 100.
• the specific structure of the electric control box 100 refers to the above-mentioned embodiments, since the outdoor unit of the air conditioner adopts all the above-mentioned embodiments All the technical solutions of the present invention, therefore at least have all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be repeated here.
• the electric control box 100 is installed on the outer machine casing 30 , and the outer machine casing 30 is provided with a heat exchange cavity 32 , and the heat dissipation cavity 12 of the electric control box 100 communicates with the heat exchange cavity 32 through the installation opening 133 .
• the outdoor unit of the air conditioner also includes an outdoor fan, an outdoor heat exchanger and a compressor assembly.
• the outer machine casing 30 has a heat exchange chamber 32 and a compressor chamber 31, and the outdoor fan and the outdoor heat exchanger are located in the heat exchange chamber. 32.
• the compressor assembly is arranged in the compressor chamber 31, and the electric control box 100 is used to be installed on the top or side of the compressor assembly.
• the electric control box 100 can be installed in the compressor cavity 31 , and can also be integrally arranged above the compressor cavity 31 .
• an outdoor fan is arranged in the heat exchange chamber 32 , and the installation port 133 communicates with the negative pressure side of the outdoor fan. That is, when the outdoor fan is working, the outdoor fan can generate negative pressure at the installation port 133, thereby driving the airflow in the compressor chamber 31 to flow through the radiator 20 from the first air outlet 131 and the second air outlet 132 to the outdoor fan, so The way of using the outdoor fan to drive the air flow through the radiator 20 can avoid installing an additional fan, simplify the structure of the outdoor unit of the air conditioner, reduce the energy consumption of the outdoor unit of the air conditioner, and reduce the cost.
• the negative pressure generated by the outdoor fan can be used to drive the airflow in the compressor chamber 31 to flow through the radiator 20 from the first air outlet 131 and the second air outlet 132, thereby The radiator 20 dissipates heat. Since the first air outlet 131 in the electric control box is closer to the heat conduction part 21 than the second air outlet 132, the air flow from the first air outlet 131 to the heat dissipation part 22 can flow to the heat dissipation part 22 close to the heat conduction part 21 as much as possible.
• One end, and the air flow from the second air outlet 132 to the heat dissipation part 22 can flow to the end of the heat dissipation part 22 away from the heat conduction part 21 as much as possible, and the air flow from the first air passage 131 to the heat dissipation part 22 is the same as the air flow from the second air passage 132 to the
• the airflow of the heat dissipation part 22 may also flow to the part between the two ends of the heat dissipation part 22 .
• the comprehensive air flow can act on the part of the heat dissipation part 22 close to the heat conduction part 21 and the part far from the heat conduction part 21 at the same time through the first air outlet 131, which increases the airflow flow through the heat dissipation part 22 and increases the The heat exchange area of the air flow and the heat dissipation part 22 .
• the end of the heat dissipation part 22 near the heat conduction part 21 is the position with the highest temperature on the heat dissipation part 22, by making the airflow flowing from the first air outlet 131 to the heat dissipation part 22 directly flow to the end of the heat dissipation part 22 close to the heat conduction part 21, it can be better like this
• the highest temperature position on the heat dissipation part 22 is efficiently dissipated, which greatly reduces the risk of overheating of the electric control box 100 .
• the present application also proposes an air conditioner, which includes an air conditioner indoor unit and an air conditioner outdoor unit.
• the specific structure of the air conditioner outdoor unit refers to the above-mentioned embodiments. Since this air conditioner adopts all the technical solutions of all the above-mentioned embodiments, at least All the beneficial effects brought by the technical solutions of the above embodiments will not be repeated here.
• the refrigerant system of the outdoor unit of the air conditioner is connected with the refrigerant system of the indoor unit of the air conditioner.
• the air conditioner indoor unit can be a floor-standing air conditioner indoor unit, or a wall-mounted air conditioner indoor unit.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Other Air-Conditioning Systems (AREA)

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Applications Claiming Priority (2)

Publications (1)

Family

ID=79946338

Family Applications (1)

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Citations (5)

• 2021
  • 2021-06-28 CN CN202121451766.3U patent/CN215637643U/zh active Active
  • 2021-09-01 EP EP21947863.3A patent/EP4345389A1/de active Pending
  • 2021-09-01 WO PCT/CN2021/116020 patent/WO2023272927A1/zh active Application Filing

Patent Citations (5)

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