Heat dissipation assembly of power equipment and power equipment

Abstract

The utility model provides a heat dissipation assembly of power equipment and the power equipment. The heat dissipation assembly comprises a heat exchanger, a first fan and a second fan, the heat exchanger is arranged outside the box body of the power equipment and comprises a plurality of heat dissipation pipes which are arranged in parallel, each heat dissipation pipe comprises a first heat dissipation part and a second heat dissipation part, and an internal channel of the first heat dissipation part is communicated with the interior of the box body; the first fan is arranged in the box body, an inner channel of the second heat dissipation part communicates with the first fan, the first fan is used for driving gas in the box body to flow in an inner air channel, and the inner air channel comprises inner channels of the multiple heat dissipation pipes; the second fan is arranged outside the box body, the air inlet side or the air outlet side of the second fan is arranged opposite to the heat exchanger, the second fan is used for driving air outside the box body to flow in the outer air duct, and the outer air duct comprises outer gaps of the heat dissipation pipes. According to the embodiment of the utility model, the internal space of the power equipment box body occupied by the heat exchanger can be reduced, and the heat dissipation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power electronic equipment heat dissipation technical field, especially power equipment's heat dissipation subassembly and power equipment. BACKGROUND

[0002] Current power equipment will involve the heat dissipation problem of internal heating device of equipment. In the current practical application, natural heat dissipation based on flow fan is usually carried out, or the heat exchanger is placed in the equipment cabinet to carry out forced air cooling heat dissipation. Based on the natural heat dissipation of flow fan, although certain heat dissipation demand can be met, but its heat dissipation capacity has limitation. Based on the forced air cooling heat dissipation of heat exchanger, the heat exchanger will occupy the large internal space of equipment cabinet.

[0003] Therefore, how to improve the heat dissipation capacity of power equipment and reduce the occupation of internal space of equipment cabinet is crucial. CONTENT OF UTILITY MODEL

[0004] The utility model provides a kind of power equipment's heat dissipation subassembly and power equipment.

[0005] First, the utility model provides a kind of power equipment's heat dissipation subassembly, comprising: heat exchanger, first fan and second fan;The heat exchanger is arranged at the outside of the cabinet of the power equipment, including the parallel arrangement of multiple heat dissipation pipes, each heat dissipation pipe includes first heat dissipation part and second heat dissipation part, and the internal passage of the first heat dissipation part is communicated with the inside of the cabinet;The first fan is arranged in the inside of the cabinet, and the internal passage of the second heat dissipation part is communicated with the first fan, and the first fan is used to drive the gas in the inside of the cabinet to flow in the internal air duct, and the internal air duct includes the internal passage of the multiple heat dissipation pipes;The second fan is arranged at the outside of the cabinet, and the air inlet side or air outlet side of the second fan is oppositely arranged with the heat exchanger, and the second fan is used to drive the gas outside the cabinet to flow in the external air duct, and the external air duct includes the external gap of the multiple heat dissipation pipes.

[0006] In some possible implementation manners, each heat dissipation pipe includes one or more internal passages, and there is an external gap between each heat dissipation pipe.

[0007] In some possible implementation manners, the heat dissipation subassembly further includes an outer cavity, and the outer cavity is arranged at the outside of the cabinet and communicated with the internal passage of the multiple heat dissipation pipes, and the outer cavity is used to make the gas entering the outer cavity turn.

[0008] In some possible implementation manners, the heat dissipation subassembly further includes a baffle, and the baffle is arranged at the outside of the cabinet and vertically connected with the multiple heat dissipation pipes, and the internal passage is used to make the gas entering the internal passage turn.

[0009] In some possible implementation manners, the heat exchanger is arranged on an air outlet side of the second fan; or, the heat exchanger is arranged on an air inlet side of the second fan.

[0010] In some possible implementation manners, the second heat dissipation part is arranged on an air inlet side of the first fan; or, the second heat dissipation part is arranged on an air outlet side of the first fan.

[0011] In some possible implementation manners, the heat dissipation assembly further comprises an inner cavity, which is arranged in the interior of the box and communicates with the interior of the box via the first fan.

[0012] In some possible implementation manners, the inner cavity is arranged on an air inlet side of the first fan; or, the inner cavity is arranged on an air outlet side of the first fan.

[0013] In some possible implementation manners, the heat dissipation pipe is in a flat tube structure.

[0014] In some possible implementation manners, a thickness parameter of the heat dissipation pipe ranges from 0.3 mm to 0.6 mm; a length parameter of the heat dissipation pipe ranges from 100 mm to 130 mm; a width parameter of the heat dissipation pipe ranges from 3 mm to 5 mm; and an external gap parameter of the heat dissipation pipe ranges from 2 mm to 5 mm.

[0015] In a second aspect, the utility model provides a kind of power equipment, comprising: box and above-mentioned heat dissipation assembly;Wherein, the interior of the box is provided with heating device.

[0016] The heat dissipation assembly of the power equipment provided by the utility model embodiment, specifically comprising heat exchanger, first fan and second fan, the heat exchanger is arranged on the outside of power equipment box, can reduce the occupation of heat exchanger to the internal space of power equipment box;The internal passage of heat exchanger heat dissipation pipe is formed into inner air duct, the external gap of heat exchanger heat dissipation pipe is formed into outer air duct, simplifies air duct structure, reduces gas corner, can reduce air resistance, and further based on the first fan drives gas to flow in inner air duct, based on the second fan drives gas to flow in outer air duct, to improve heat dissipation efficiency and heat dissipation capacity.

[0017] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the utility model, and is not used to limit the scope of the utility model. Other features of the utility model will become easy to understand through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are used to provide further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation to the present application. It will become more apparent to those skilled in the art from the following detailed description of the exemplary embodiments with reference to the accompanying drawings, in which:

[0019] Figure 1 A side view sectional view of a heat dissipation assembly of a power device provided for an embodiment of the present application;

[0020] Figure 2a A structure schematic view of a heat exchanger provided for an embodiment of the present application;

[0021] Figure 2b A structure schematic view of another heat exchanger provided for an embodiment of the present application;

[0022] Figure 2c A size schematic view of a heat dissipation pipe provided for an embodiment of the present application;

[0023] Figure 3a A side view sectional view of a heat dissipation assembly of a power device provided for an embodiment of the present application;

[0024] Figure 3b A side view sectional view of another heat dissipation assembly of a power device provided for an embodiment of the present application;

[0025] Figure 4a A schematic view of gas flow in an inner air duct provided for an embodiment of the present application;

[0026] Figure 4b A schematic view of gas flow in an outer air duct provided for an embodiment of the present application;

[0027] Figure 5a A schematic view of another gas flow in an inner air duct provided for an embodiment of the present application;

[0028] Figure 5b A schematic view of another gas flow in an outer air duct provided for an embodiment of the present application;

[0029] Figure 6 A schematic view of gas flow in a box body provided for an embodiment of the present application;

[0030] Figure 7 A schematic view of another gas flow in a box body provided for an embodiment of the present application;

[0031] Figure 8 A schematic view of another gas flow in an inner air duct provided for an embodiment of the present application;

[0032] Figure 9 A top view sectional view of the power device is provided in the embodiments of the present application. DETAILED DESCRIPTION

[0033] In order for those skilled in the art to better understand the technical scheme of the present application, the exemplary embodiments of the present application are described below in conjunction with the drawings, which include various details of the embodiments of the present application to help understanding, and should be considered as merely exemplary. Therefore, those skilled in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Also, in order to be clear and concise, the description below omits the description of well-known functions and structures.

[0034] In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0035] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] The terms used herein are only used to describe specific embodiments and are not intended to limit the present application. As used herein, the singular forms "a" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the terms "comprise" and / or "consist of, when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. The terms "connected" or "coupled" and / or similar terms are not limited to a physical or mechanical connection or coupling, but can include an electrical connection, whether direct or indirect.

[0037] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present application, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0038] At present, the heat dissipation of the heat generating device in the box is mainly handled by two schemes, one of which is a natural heat dissipation scheme with a flow fan, which has a simple structure and can meet the heat dissipation demand to a certain extent, but the heat dissipation capacity is obviously limited, and it is difficult to provide sufficient heat dissipation efficiency when facing a power device, and it is difficult to ensure stable and efficient operation of the device; another commonly used scheme is a forced air cooling heat dissipation scheme using an air-to-air heat exchanger with a flat tube and fins, which has the problems of occupying a large space in the box, affecting the compactness of the device layout, complex air duct design, large air resistance, reducing the heat dissipation efficiency, large fin distribution density, inconvenient cleaning and maintenance, and excessive dust accumulation affecting heat dissipation.

[0039] According to the embodiment of the utility model, the heat exchanger is arranged outside the power device box, which can reduce the occupation of the internal space of the power device box by the heat exchanger, improve the utilization rate of the internal space of the box, and simplify the air duct structure, reduce the air resistance, and further drive the gas to flow in the inner air duct based on the first fan and drive the gas to flow in the outer air duct based on the second fan, thereby improving the heat dissipation efficiency and heat dissipation capacity; the heat exchanger heat dissipation pipe preferably adopts a flat tube structure, which is more convenient to maintain and clean than the fin structure in the actual application.

[0040] Figure 1 A side view sectional view of a heat dissipation assembly of a power device is provided for the embodiment of the utility model. As shown in Figure 1 The heat dissipation assembly of the power device comprises a heat exchanger 10, a first fan 11 and a second fan 12; the heat exchanger 10 is arranged outside the box of the power device and comprises a plurality of heat dissipation pipes 101 arranged in parallel, each heat dissipation pipe 101 comprises a first heat dissipation part and a second heat dissipation part, and the internal passage of the first heat dissipation part is in communication with the interior of the box; the first fan 11 is arranged inside the box, and the internal passage of the second heat dissipation part is in communication with the first fan 11, the first fan 11 is used to drive the gas in the inner air duct in the box, and the inner air duct comprises the internal passages of the plurality of heat dissipation pipes 101; the second fan 12 is arranged outside the box, the air inlet side or the air outlet side of the second fan 12 is arranged opposite to the heat exchanger 10, and the second fan 12 is used to drive the gas outside the box to flow in the outer air duct, and the outer air duct comprises the external gaps of the plurality of heat dissipation pipes 101.

[0041] Specifically, Figure 1The box shown in the figure is a box of a power device, and the heat exchanger 10 of the heat dissipation assembly is arranged outside the box, so that the internal space of the power device box can be reduced. The heat exchanger 10 is composed of parallelly arranged heat dissipation pipes 101 containing channels inside, and each heat dissipation pipe 101 can be divided into a first heat dissipation part and a second heat dissipation part according to the flow direction of gas in the heat exchanger 10. As shown in Figure 1 the figure, the part of the internal channel of the heat dissipation pipe 101 directly communicating with the inside of the box is the first heat dissipation part, the part of the internal channel of the heat dissipation pipe 101 communicating with the first fan 11 is the second heat dissipation part, and the second heat dissipation part communicates with the inside of the box through the first fan 11. The first fan 11 and the second fan 12 are arranged inside and outside the box respectively, the first fan 11 can be connected with the box of the power device perpendicularly to the direction of the internal channel of the heat dissipation pipe 101, and the second fan 12 can be arranged opposite to the heat exchanger 10 in parallel to the direction of the internal channel of the heat dissipation pipe 101. The first fan 11 can be used to drive the gas in the box to flow in the internal air duct composed of the internal channels of the heat dissipation pipes 101, and the second fan 12 can be used to drive the gas outside the box to flow in the external air duct composed of the external gaps of the heat dissipation pipes 101.

[0042] By arranging the heat exchanger outside the box of the power device, the internal space of the power device box can be reduced, and the utilization rate of the internal space of the box is improved. The gas is driven to flow in the internal air duct by the first fan, and the gas is driven to flow in the external air duct by the second fan, so that the heat dissipation efficiency is improved.

[0043] In some possible implementation manners, the heat dissipation pipe is a flat pipe structure. Specifically, the heat exchanger is composed of parallelly arranged flat pipes.

[0044] In some possible implementation manners, each heat dissipation pipe includes one or more internal channels, and there is an external gap between each heat dissipation pipe.

[0045] Figure 2a A structure diagram of a heat exchanger is provided for the embodiment of the utility model. As shown in the figure, Figure 2a each heat dissipation pipe 101 includes a plurality of internal channels, and there is an external gap between each heat dissipation pipe 101. In actual application, the heat exchanger and the box of the power device can be connected through the bottom disc communication port 21.

[0046] Figure 2b Another structure diagram of a heat exchanger is provided for the embodiment of the utility model. As shown in the figure, Figure 2b each heat dissipation pipe 101 includes one internal channel, that is, each heat dissipation pipe 101 internally constitutes a whole channel, and there is an external gap between each heat dissipation pipe 101.

[0047] In actual applications, the size of the heat dissipation pipe of the heat exchanger is not fixed, and different sizes of the heat dissipation pipe can be set in different actual application scenarios. The size of the heat dissipation pipe can be determined based on a simulation algorithm and in combination with an actual application scenario. Referring to Figure 2c , Figure 2c A size diagram of the heat dissipation pipe provided in the embodiments of the present application is shown in FIG. 3, which shows that the size parameters of the heat dissipation pipe specifically include the thickness, width, length of the heat dissipation pipe, and the external gap between each heat dissipation pipe. Figure 2c

[0048] In the embodiments provided in the present application, in the process of simulating the thickness, width, length of the heat dissipation pipe, and the external gap between each heat dissipation pipe, the maximum length A that can be allowed to manufacture the heat exchanger can be obtained first, and the thickness B range of the heat dissipation pipe is obtained according to the minimum value of the heat dissipation pipe thickness that can be processed by the factory and the industry experience parameter value. Correspondingly, the width C of the heat dissipation pipe is obtained according to the minimum value of the heat dissipation pipe width that can be processed by the factory and the industry experience parameter value. Since the heat dissipation assembly will be installed on a power device for use in actual applications, and the space range reserved for the heat exchanger is different in different actual application scenarios, the height D of the heat exchanger, i.e., the length of the heat dissipation pipe, can be determined according to the actual reserved space range of the heat exchanger. Further, the range of the external gap E between the heat dissipation pipes can be determined according to the number of the heat dissipation pipes in the heat exchanger and the industry experience parameter value.

[0049] After obtaining the maximum length A of the heat exchanger, the thickness B range of the heat dissipation pipe, the width C of the heat dissipation pipe, the height D of the heat exchanger, and the range of the external gap E between the heat dissipation pipes, the thickness, length, width, and external gap of the heat dissipation pipe can be preliminarily set respectively, and the falling temperature in the box based on the current set parameters can be obtained after simulation based on the simulation algorithm. In actual applications, in order to measure the heat dissipation effect of the heat dissipation assembly, a temperature drop threshold value is often set in advance, and on this basis, the falling temperature in the box can be compared with the pre-set temperature drop threshold value to determine whether the current set parameters need to be adjusted. If the falling temperature does not reach the temperature drop threshold value, the thickness, length, width, and external gap parameters of the heat dissipation pipe are adjusted respectively, and the falling temperature in the box in the next round is obtained after simulation based on the adjusted parameters, until the falling temperature reaches the temperature drop threshold value.

[0050] ​To further improve the accuracy of determining the size parameters of the heat dissipation pipe, the thickness, length, width and external gap of the heat dissipation pipe can be adjusted and optimized respectively after the temperature drop reaches the temperature drop threshold. In the process of adjusting and optimizing a single parameter, if the single parameter reaches the maximum or minimum value in its parameter range, and the temperature drop in the box is high or the temperature in the box shows a downward trend, the single parameter is taken as the maximum or minimum value. In this way, the thickness, length, width and external gap of the heat dissipation pipe can be adjusted and the corresponding parameter values can be determined according to the above adjustment method of a single parameter.

[0051] Table 1 below is the cooling simulation results obtained by the heat dissipation pipe size parameter combination provided in the embodiment of the present application.

[0052] Table 1

[0053]

[0054] In the above table 1, seven groups of heat dissipation pipe size parameter combinations and the simulation results of the temperature drop corresponding to each group of combination parameters are shown. In the embodiment of the present application, the thickness of the heat dissipation pipe can be preferably 0.3mm, 0.4mm, 0.5mm, 0.6mm, the length of the heat dissipation pipe can be preferably 100mm, 110mm, 120mm, 130mm, the width of the heat dissipation pipe can be preferably 3mm, 4mm, 5mm, and the external gap of the heat dissipation pipe can be preferably 2mm, 3mm, 4mm, 5mm.

[0055] Based on this, in some possible implementation manners, the thickness parameter range of the heat dissipation pipe is [0.3mm, 0.6mm]; the length parameter range of the heat dissipation pipe is [100mm, 130mm]; the width parameter range of the heat dissipation pipe is [3mm, 5mm]; and the external gap parameter range of the heat dissipation pipe is [2mm, 5mm].

[0056] Further, for the thickness of the heat dissipation pipe, the mechanical strength of the heat dissipation pipe can be improved by increasing the thickness of the heat dissipation pipe, thereby reducing the risk of deformation of the heat dissipation pipe. However, the increase of the thickness of the heat dissipation pipe will increase the thermal resistance, specifically, the thermal resistance will increase by about 5%-8% for each 0.1mm increase of the thickness of the heat dissipation pipe. In addition, the increase of the thickness of the heat dissipation pipe will also increase the material consumption of the heat dissipation pipe, thereby increasing the cost and weight of the heat dissipation pipe.

[0057] For the width of the heat dissipation pipe, the heat exchange area of the heat dissipation pipe can be increased by increasing the width of the heat dissipation pipe, specifically, the heat dissipation amount can be increased by about 6%-8% for each 1% increase of the width of the heat dissipation pipe, and the flow distribution of the gas is more uniform. However, if the width of the heat dissipation pipe is too large, the hydraulic diameter of the heat dissipation pipe will decrease and the flow resistance will increase.

[0058] For the length of the heat dissipation pipe, the heat exchange time of the gas can be prolonged and the contact time of the gas with the heat dissipation pipe can be improved by increasing the length of the heat dissipation pipe; but increasing the length of the heat dissipation pipe will cause the pressure drop to rise nonlinearly, specifically, the pressure drop will rise by about 30%-40% for every 20% increase in the length of the heat dissipation pipe, and if the length of the heat dissipation pipe is relatively long, the volume of the heat dissipation pipe will increase, which is not conducive to compact design.

[0059] For the external gap between the heat dissipation pipes, reducing the external gap between the heat dissipation pipes can enhance the turbulent flow and make the heat exchange coefficient of the heat dissipation pipes increase by about 15%-25%, but the wind resistance will also increase significantly, at which time a second fan with higher power needs to be matched; correspondingly, increasing the external gap between the heat dissipation pipes can reduce the wind resistance, but the heat exchange coefficient of the heat dissipation pipes will also decrease.

[0060] Based on this, in actual application, the thickness, width, length and external gap of the heat dissipation pipes can be respectively set according to actual application scenarios to cope with different application scenarios and improve the heat dissipation efficiency and heat dissipation effect, which is not limited in the utility model.

[0061] The internal passage of the heat dissipation pipe constitutes an internal air duct for the gas flow inside the box, and the external gap of the heat dissipation pipe constitutes an external air duct for the gas flow outside the box, which can simplify the structure of the air duct and reduce the wind resistance of the gas flow in the air duct, thereby improving the heat dissipation efficiency of the power equipment.

[0062] In some possible implementations, the heat dissipation assembly further includes an outer cavity, which is arranged outside the box and communicates with the internal passages of the plurality of heat dissipation pipes, and the outer cavity is used for diverting the gas entering the outer cavity.

[0063] Continuing to refer to Figure 2a As shown in Figure 2a The heat dissipation assembly further includes an outer cavity 20, which is arranged outside the box and communicates with the internal passage of the heat dissipation pipe 101. The outer cavity 20 can constitute an internal air duct of the heat dissipation assembly with the internal passage of the heat dissipation pipe 101, and the gas can be diverted in the outer cavity 20 after entering the outer cavity 20 through the internal passage of the heat dissipation pipe 101.

[0064] In some possible implementations, the heat exchanger is arranged on the air outlet side of the second fan; or, the heat exchanger is arranged on the air inlet side of the second fan.

[0065] In some possible implementations, the second heat dissipation part is arranged on the air inlet side of the first fan; or, the second heat dissipation part is arranged on the air outlet side of the first fan.

[0066] In actual application, the heat exchanger can be arranged at the air outlet side of the second fan, and the second heat dissipation part is arranged at the air inlet side of the first fan.

[0067] Further, Figure 3a A side view sectional view of a heat dissipation assembly of a power device is provided in the embodiments of the present application. Figure 3a As shown in the figure, the heat dissipation assembly further comprises an inner cavity 30.

[0068] Specifically, the inner cavity 30 is arranged inside the box body and can form an inner air duct together with the internal passage of the heat dissipation pipe 101 and the outer cavity 20.In actual application, the first fan 11 can be partially embedded in the inner cavity 30 or arranged outside the inner cavity 30.

[0069] In actual application, the heat dissipation assembly can be arranged as shown in the figure. Figure 3b Figure 3b A side view sectional view of another heat dissipation assembly of a power device is provided in the embodiments of the present application. Figure 3b As shown in the figure, the heat exchanger 10 is connected perpendicularly to the box body along the height direction of the box body, and the second fan 12 is arranged below the heat exchanger 10.

[0070] The embodiment of the utility model discloses the heat exchanger is arranged in the air outlet side of the second fan or the heat exchanger is arranged in the air inlet side of the second fan, so that cold air can enter the heat exchanger from the bottom of the heat exchanger, can solve the problem that the working space of power equipment is limited, is close to the wall or the working environment of cabinet, due to the distance of obstacle is close, leading to the problem of poor air inlet or air outlet and affecting the heat dissipation effect. Through inhaling cold air from the bottom of the heat exchanger, hot air is discharged from the top of the heat exchanger, using the natural convection principle of hot air rising, forming efficient air circulation to improve the heat dissipation efficiency;Hot air is discharged from the top or side of the heat exchanger and is not easily inhaled by the air inlet of the second fan arranged at the bottom of the heat exchanger, which can reduce the reflux of hot air and reduce the possibility of circulating hot air inside the power equipment, so as to maintain a lower operating temperature of the power equipment. At the same time, the air inlet from the bottom of the heat exchanger can make the second fan inhale air with lower temperature, reduce the air with higher temperature after heating through the heat exchanger, so as to reduce the temperature of the second fan itself, reduce the working burden of the second fan, and prolong the service life of the second fan.

[0071] Further, the utility model also provides a fan rotating speed adjustment method of radiating assembly to dynamically adjust the rotating speed of the second fan, and specifically comprises the following steps:

[0072] Step 1002: collect the first box temperature of the power equipment at the current time, and obtain the second box temperature of the power equipment at the previous time.

[0073] The power equipment comprises the radiating assembly as described above.

[0074] Step 1004: determine the target temperature interval corresponding to the first box temperature.

[0075] Step 1006: according to the target temperature interval, the first box temperature and the second box temperature, determine the to-be-adjusted rotating speed of the second fan in the radiating assembly, and adjust the rotating speed of the second fan to the to-be-adjusted rotating speed.

[0076] The first box temperature refers to the temperature of the power equipment box inside at the current time, and the second box temperature refers to the temperature of the power equipment box inside at the previous time of the current time. The previous time is specifically any time in the previous time of the current time, for example, in time t0, t1, t2, t3, t4, if the current time is t4, the previous time can be any time in t0, t1, t2, t3. In actual application, a certain time interval can be set to collect the box temperature of the power equipment, and based on this, the previous time can be determined according to the time interval of collecting the box temperature.

[0077] The target temperature interval refers to one of a plurality of preset temperature intervals, and specifically refers to a temperature interval to which the first cabinet temperature belongs. The to-be-adjusted rotating speed is used to adjust the rotating speed of the second fan, that is, the rotating speed of the second fan after adjustment.

[0078] Specifically, the temperature sensor can be used to collect the first cabinet temperature of the power equipment at the current time based on a preset time interval, and to obtain the second cabinet temperature of the power equipment at the previous time. The target temperature interval to which the first cabinet temperature belongs is determined, so as to determine the to-be-adjusted rotating speed of the second fan according to the target temperature interval, the first cabinet temperature and the second cabinet temperature, and to adjust the rotating speed of the second fan to the determined to-be-adjusted rotating speed.

[0079] The embodiment of the utility model adjusts the rotating speed of the second fan arranged outside the cabinet according to the temperature inside the cabinet, which can reduce the energy consumption of the second fan and prolong the service life of the second fan.

[0080] Further, in the specific implementation manner provided in the embodiment of the utility model, according to the target temperature interval, the first cabinet temperature and the second cabinet temperature, the to-be-adjusted rotating speed of the second fan in the heat dissipation assembly is determined, including:

[0081] Obtaining a temperature fluctuation interval;

[0082] According to the first cabinet temperature and the second cabinet temperature, a cabinet temperature difference is determined;

[0083] In the case where the cabinet temperature difference is not located in the temperature fluctuation interval, the to-be-adjusted rotating speed of the second fan is determined according to the target temperature interval and the first cabinet temperature;

[0084] In the case where the cabinet temperature difference is located in the temperature fluctuation interval, the current rotating speed of the second fan is determined as the to-be-adjusted rotating speed.

[0085] The temperature fluctuation interval refers to the temperature fluctuation range interval inside the power equipment cabinet. The temperature fluctuation interval can be customized according to actual application, for example, the temperature fluctuation interval can be set as [-2, 2] and the like. The cabinet temperature difference specifically refers to the difference between the first cabinet temperature and the second cabinet temperature, and is used to measure the change of the temperature inside the cabinet collected at adjacent times.

[0086] Since the temperature inside the power equipment cabinet changes in real time in actual application, the temperature fluctuation also has certain differences. In order to reduce the adjustment frequency of the rotating speed of the second fan and prolong the service life of the second fan, whether the rotating speed of the second fan needs to be adjusted can be determined according to the preset temperature fluctuation interval.

[0087] Specifically, after determining the first cabinet temperature and the second cabinet temperature of the power equipment, a temperature fluctuation interval is obtained, and a cabinet temperature difference is determined according to the first cabinet temperature and the second cabinet temperature. If the determined cabinet temperature difference is not located in the temperature fluctuation interval, it indicates that the temperature fluctuation inside the cabinet of the power equipment is large, and at this time, the speed of the second fan needs to be adjusted. Specifically, the speed to be adjusted of the second fan can be determined according to the target temperature interval and the first cabinet temperature. In actual application, the cabinet temperature can be divided into a low temperature interval, a medium temperature interval and a high temperature interval according to the height of the cabinet temperature, and different temperature intervals are correspondingly provided with different speed increasing coefficients. For example, the speed increasing coefficient corresponding to the low temperature interval can be 2%, the speed increasing coefficient corresponding to the medium temperature interval can be 3%, and so on. In the case that the determined cabinet temperature difference is not located in the temperature fluctuation interval, the speed of the second fan can be adjusted according to the speed increasing coefficient corresponding to the target temperature interval.

[0088] In the above example, if it is determined that the target temperature interval is the low temperature interval, and the speed increasing coefficient corresponding to the low temperature interval is 2%, then the speed of the second fan is increased by 2% for each 1-degree increase of the cabinet temperature.

[0089] If the determined cabinet temperature difference is located in the temperature fluctuation interval, it indicates that the temperature fluctuation inside the cabinet of the power equipment is small, and in order to reduce the adjustment frequency of the speed of the second fan, the speed of the second fan does not need to be adjusted at this time, that is, the current speed of the second fan is determined as the speed to be adjusted of the second fan.

[0090] It needs to be noted that if the temperature inside the cabinet of the power equipment reaches a pre-set high temperature interval, the speed of the second fan can be directly adjusted to 100%.

[0091] The method provided in the embodiment of the utility model can adjust the speed of the second fan according to the temperature inside the cabinet of the power equipment, and reduce the energy consumption of the second fan.

[0092] Since the temperature inside the cabinet of the power equipment is constantly fluctuating, the rate of temperature rise or fall is also different. In order to avoid that the temperature inside the cabinet is too high, the rate of temperature rise inside the cabinet can also be detected to protect the power equipment from overload, and the implementation manner is as follows:

[0093] Based on this, in a specific implementation manner provided in the utility model, the method further comprises:

[0094] obtaining multiple cabinet temperatures of the power equipment;

[0095] determining a temperature rise rate of the power equipment according to the multiple cabinet temperatures;

[0096] In a case where the temperature rising rate reaches a preset temperature rate threshold, the rotating speed of the second fan is adjusted to a rotating speed threshold.

[0097] The preset temperature rate threshold is specifically an upper limit of the temperature rate of the inside of the cabinet that is preset. The rotating speed threshold is an upper limit of the rotating speed of the second fan, for example, 100%.

[0098] Specifically, multiple cabinet temperatures of the power equipment are acquired, and a temperature rising rate of the power equipment is determined according to the acquired multiple cabinet temperatures.

[0099] In addition, the rotating speed of the second fan can also be adjusted according to air pressure sensor data acquired by an air pressure sensor.

[0100] Further, in a specific embodiment of the utility model, the method further comprises:

[0101] The multiple cabinet temperatures of the power equipment in a preset time interval are acquired.

[0102] In a case where the multiple cabinet temperatures all reach a preset temperature threshold, temperature alarm information is generated.

[0103] The preset temperature threshold is specifically an upper limit of the inside of the cabinet that is preset. The temperature alarm information is used to prompt that the temperature inside the cabinet of the power equipment is too high.

[0104] Specifically, the multiple cabinet temperatures of the power equipment in a preset time interval can be acquired.

[0105] In addition, a reference temperature threshold, for example, 25 degrees, can be set to start the second fan when the temperature inside the cabinet reaches the reference temperature threshold. A full-speed temperature threshold, for example, 65 degrees, can also be set to force the second fan to run at a rotating speed of 100%.

[0106] The method provided by the embodiment of the utility model can timely dynamically adjust the rotating speed of the second fan arranged outside the box body according to the temperature inside the power equipment box body, reduce the energy consumption of the second fan, and prolong the service life of the second fan.

[0107] In some possible implementation manners, the inner cavity is arranged on the air inlet side of the first fan; or, the inner cavity is arranged on the air outlet side of the first fan.

[0108] Correspondingly, the inner cavity can be arranged on the air inlet side of the first fan or on the air outlet side of the first fan. In the case that the heat exchanger is arranged on the air outlet side of the second fan, the inner cavity is arranged on the air inlet side of the first fan; in the case that the heat exchanger is arranged on the air inlet side of the second fan, the inner cavity is arranged on the air outlet side of the first fan.

[0109] Figure 4a A schematic diagram of gas flow in the inner air duct is provided for the embodiment of the utility model, Figure 4b A schematic diagram of gas flow in the outer air duct is provided for the embodiment of the utility model. Taking the case that the heat dissipation assembly includes the inner cavity and the outer cavity as an example, the heat dissipation process of the heat dissipation assembly is explained and described. As shown in Figure 4a and Figure 4b , after the heat generating device of the power equipment generates heat and the heat air is dissipated, the heat air in the box body enters the inner air duct from the inner passage of the first heat dissipation part heat dissipation pipe, at the same time, the cold air outside the box body is blown into the outer gap of the heat dissipation pipe by the second fan. In this process, the heat of the heat air is transferred to the inner side surface of the inner passage of the heat dissipation pipe through convection heat exchange, and then is transferred to the outer side surface of the inner passage of the heat dissipation pipe through wall heat conduction, and the heat is transferred to the cold air blown in by the second fan, to realize the first cooling of the heat air. The first cooled heat air enters the outer cavity through the inner passage of the heat dissipation pipe, and after completing the gas turning in the outer cavity, enters the inner passage of the second heat dissipation part heat dissipation pipe, and based on the same method as the above first cooling, the heat air is cooled for the second time. The second cooled heat air enters the inner cavity, and is blown back to the box body by the first fan, to form a circulation, thereby realizing heat dissipation.

[0110] The heat dissipation assembly provided by the embodiment of the utility model is not directly communicated with the external environment, has high airtightness, and improves the stability and reliability of the heat dissipation assembly.

[0111] The above is the explanation and description of the heat dissipation of the heat dissipation assembly in the case that the heat exchanger is arranged on the air outlet side of the second fan and the inner cavity is arranged on the air inlet side of the first fan. In the case that the heat exchanger is arranged on the air inlet side of the second fan and the inner cavity is arranged on the air outlet side of the first fan, the gas flow of the heat dissipation assembly in the heat dissipation process can be referred to Figure 5a and Figure 5b .Figure 5a Another internal air duct gas flow schematic diagram provided by the utility model embodiment, Figure 5b Another external air duct gas flow schematic diagram provided by the utility model embodiment. Similar to the heat dissipation process of the heat dissipation assembly in the case that the heat exchanger is arranged on the air outlet side of the second fan and the inner cavity is arranged on the air inlet side of the first fan, after the heat dissipation device of the power equipment generates hot air, the hot air in the box is blown into the internal air duct from the internal passage of the second heat dissipation part heat dissipation pipe by the first fan, after completing heat dissipation, enters the box through the internal passage of the first heat dissipation part heat dissipation pipe, and the specific heat dissipation process can be referred to the above content, and the utility model will not be repeated here.

[0112] It needs to be explained that in the case that the heat dissipation assembly comprises the external cavity, the internal passage of the heat dissipation pipe can be one or multiple, and in the utility model, the implementation mode of multiple internal passages is preferred.

[0113] Correspondingly, Figure 6 A box internal gas flow schematic diagram provided by the utility model embodiment, Figure 7 Another box internal gas flow schematic diagram provided by the utility model embodiment. The gas flow process in the box can be referred to the above content, Figure 6 And Figure 7 Among them, Figure 6 Specifically show the flow process of the gas in the box in the case that the heat exchanger 10 is arranged on the air outlet side of the second fan 12 and the inner cavity 30 is arranged on the air inlet side of the first fan 11, Figure 7 Specifically show the flow process of the gas in the box in the case that the heat exchanger 10 is arranged on the air inlet side of the second fan 12 and the inner cavity 30 is arranged on the air outlet side of the first fan 11.

[0114] In some possible implementation modes, the heat dissipation assembly further comprises a baffle, the baffle is arranged on the outside of the box and is connected with the multiple heat dissipation pipes perpendicularly, and the internal passage is used for turning the gas entering the internal passage.

[0115] Continuously referring to Figure 2b As shown in Figure 2b The heat dissipation assembly further comprises a baffle 22, the baffle 22 is arranged on the outside of the box and is connected with the heat dissipation pipe 101 perpendicularly. In this way, the gas can be turned in the internal passage after entering the internal passage of the heat dissipation pipe 101. Figure 8 Another internal air duct gas flow schematic diagram provided by the utility model embodiment. Figure 8 Specifically show the flow process of the gas in the internal air duct in the case that the heat exchanger is arranged on the air outlet side of the second fan and the inner cavity is arranged on the air inlet side of the first fan, at this time, the gas flow mode of the external air duct is similar to Figure 4bThe same, the utility model does not repeat here.

[0116] By using the baffle to replace the outer cavity, the gas is turned in the internal passage of the heat dissipation pipe, the air duct structure is further simplified, and the cost is reduced.

[0117] It should be noted that, in the case that the heat dissipation assembly includes the baffle, the internal passage of the heat dissipation pipe can be one or multiple, and in the utility model, the implementation mode of one internal passage is preferred.

[0118] According to the embodiment of the utility model, the internal space of the power equipment box occupied by the heat exchanger can be reduced, the utilization rate of the internal space of the box is improved, the air duct structure is simplified, the gas turning angle is reduced during the flow of the airflow in the air duct, the air resistance is reduced, and the heat dissipation efficiency is improved.

[0119] Figure 9 A top view sectional view of a power equipment is provided for the embodiment of the utility model. Figure 9 As shown in the figure, the embodiment of the utility model provides a power equipment, which comprises a box 90 and the heat dissipation assembly described above; wherein the inside of the box is provided with a heating device 91.

[0120] Those skilled in the art can understand that the functional modules / units in the system and device disclosed above can be implemented as software, firmware, hardware and appropriate combinations thereof. In the hardware implementation, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component can have multiple functions, or one function or step can be performed by several physical components in cooperation. Certain physical components or all physical components can be implemented as software executed by a processor, such as a central processor, a digital signal processor or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable storage medium, which can include computer storage media (or non-transitory media) and communication media (or transitory media).

[0121] Example embodiments have been disclosed herein and, although the use of specific terms is exemplified during the course of this specification, they are used in the general sense only and are not for limiting purposes. In some instances, individual features, characteristics or elements described in connection with a particular embodiment can be used singly or in combination with features, characteristics or elements described in connection with other embodiments, unless explicitly stated otherwise. Thus, it will be understood by those skilled in the art that various changes in form and details can be made without departing from the scope of the present utility model as set forth in the appended claims.

Claims

1. A heat dissipating assembly for a power device, characterized by, The heat exchanger, the first fan and the second fan are included. The heat exchanger is arranged outside the box of the power device and includes a plurality of parallel arranged heat dissipation pipes, each of which includes a first heat dissipation part and a second heat dissipation part, and the internal passage of the first heat dissipation part is in communication with the interior of the box. The first fan is arranged inside the box, and the internal passage of the second heat dissipation part is in communication with the first fan, and the first fan is used to drive the gas inside the box to flow in the internal air duct, and the internal air duct includes the internal passages of the plurality of heat dissipation pipes. The second fan is arranged outside the box, and the air inlet side or the air outlet side of the second fan is arranged opposite to the heat exchanger, and the second fan is used to drive the gas outside the box to flow in the external air duct, and the external air duct includes the external gaps of the plurality of heat dissipation pipes. Each of the heat dissipation pipes includes one or more internal passages, and there is an external gap between each of the heat dissipation pipes.

2. The heat dissipating assembly of claim 1, wherein, An external cavity is further included, which is arranged outside the box and in communication with the internal passages of the plurality of heat dissipation pipes, and the external cavity is used to divert the gas entering the external cavity.

3. The heat dissipating assembly of claim 2, wherein, A baffle is further included, which is arranged outside the box and connected perpendicularly to the plurality of heat dissipation pipes, and the internal passage is used to divert the gas entering the internal passage.

4. The heat dissipating assembly of claim 2, wherein, The heat exchanger is arranged on the air outlet side of the second fan; or the heat exchanger is arranged on the air inlet side of the second fan.

5. The heat dissipating assembly of claim 1, wherein, The second heat dissipation part is arranged on the air inlet side of the first fan; or the second heat dissipation part is arranged on the air outlet side of the first fan.

6. The heat dissipating assembly of claim 1, wherein, An internal cavity is further included, which is arranged inside the box and in communication with the interior of the box via the first fan.

7. The heat dissipating assembly of claim 1, wherein, The internal cavity is arranged on the air inlet side of the first fan; or the internal cavity is arranged on the air outlet side of the first fan.

8. The heat dissipating assembly of claim 7, wherein, The heat dissipation pipe is in a flat tube structure.

9. The heat dissipating assembly of any one of claims 1-8, wherein, The thickness parameter of the heat dissipation pipe ranges from 0.3mm to 0.6mm.

10. The heat dissipating assembly of any one of claims 1-9, wherein, The length parameter of the heat dissipation pipe ranges from 100mm to 130mm. The width parameter of the heat dissipation pipe ranges from 3mm to 5mm. The external gap parameter of the heat dissipation pipe ranges from 2mm to 5mm. The box and the heat dissipation assembly according to any one of claims 1-10 are included.

11. A power device, characterized by The interior of the box is provided with a heat generating device. ​ ​

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