Electric control box and air conditioner with same

Abstract

The electric control box comprises a box body, the box body comprises a box main body and a box cover, the box main body comprises an end plate and a surrounding plate, the surrounding plate is arranged around the end plate so that a containing cavity used for containing a circuit board can be formed between the end plate and the surrounding plate, an opening is defined in the end, away from the end plate, of the surrounding plate, and the end, away from the end plate, of the surrounding plate; the box cover is arranged on the side, away from the end plate, of the surrounding plate and connected with the surrounding plate to seal the opening, the box cover is made of metal, and a matching part used for embedding the heat dissipation pipe is formed on the box cover. According to the electric control box provided by the embodiment of the utility model, the box cover is arranged to be the metal piece, and the heat dissipation pipe is arranged on the box cover, so that the heat transfer efficiency of the box cover and the circuit board can be improved, and the heat dissipation performance of the electric control box is good.

Description

Technical Field

[0001] The utility model relates to the field of air conditioning equipment, in particular to an electric control box and an air conditioner having the same. Background Art

[0002] For some electric control boxes in the related art, the circuit board inside has a problem of difficult heat dissipation, especially when the heat generating module integrates more functions, the heat dissipation difficulty is greater. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, the utility model provides an electric control box with good heat dissipation performance.

[0004] The utility model also provides an air conditioner having the above electric control box.

[0005] The electric control box according to the first aspect of the utility model includes: a box body, the box body includes a box main body and a box cover, the box main body includes an end plate and a surrounding plate, the surrounding plate is arranged around the end plate to form a receiving cavity for receiving a circuit board between the end plate and the surrounding plate, one end of the surrounding plate away from the end plate defines an opening, the box cover is arranged on the side of the surrounding plate away from the end plate and is connected to the surrounding plate to cover the opening, the box cover is made of metal, and a fitting portion for embedding a heat dissipation pipe is formed on the box cover.

[0006] According to the electric control box of the utility model, by setting the box cover as a metal part and arranging a heat dissipation pipe on the box cover, the heat transfer efficiency between the box cover and the circuit board can be increased, and the heat dissipation performance of the electric control box is good.

[0007] In some embodiments, a heat transfer protrusion protrudes from a surface of the box cover facing the receiving cavity.

[0008] In some embodiments, at least a part of the heat transfer protrusion is disposed opposite to the fitting portion along the wall thickness direction of the box cover.

[0009] In some embodiments, the box cover is a stepped plate shape and includes a first step portion and a second step portion, the distance from the first step portion to the substrate of the circuit board is greater than the distance from the second step portion to the substrate of the circuit board, and the heat transfer protrusion includes a first protrusion protruding from the first step portion toward the receiving cavity.

[0010] In some embodiments, the electric control box includes a circuit board disposed in the receiving cavity, the circuit board includes a substrate and a first device, the first device is disposed on a side of the substrate facing the box cover and is opposite to the first step portion, and the first protrusion transfers heat in contact with the first device through a first heat conducting medium.

[0011] In some embodiments, the circuit board further includes a second device, which is disposed on a side of the substrate facing the lid and opposite to the second step portion, and a heat conduction structure member is interposed between the second step portion and the second device.

[0012] In some embodiments, the heat conduction structure member includes a heat conduction plate fixed to the substrate or the second step portion, a second heat conduction medium is disposed between the heat conduction plate and the second device, and the second step portion transfers heat to the second device through the heat conduction plate and the second heat conduction medium.

[0013] In some embodiments, the heat transfer protrusions include a plurality of cylinders arranged at intervals, and the cylinders are cylinders, prisms, or conical cylinders with a gradually decreasing cross-section in the direction towards the accommodation cavity; alternatively, the heat transfer protrusions include a plurality of sheet bodies arranged at intervals, and a plurality of the sheet bodies arranged in parallel form a heat sink group, the heat transfer protrusions include a plurality of the heat sink groups, and the sheet bodies in different heat sink groups are not parallel.

[0014] In some embodiments, the fitting portion is formed as a first fitting groove, the first fitting groove is formed on a surface of the lid away from the accommodation cavity and opens in a direction away from the accommodation cavity.

[0015] In some embodiments, the lid is in the shape of a stepped plate and includes a first step portion and a second step portion at different distances from the substrate of the circuit board, the first fitting groove includes a first groove portion provided on the first step portion and a second groove portion provided on the second step portion.

[0016] In some embodiments, the lid further includes a transition portion connected between the first step portion and the second step portion, the first fitting groove includes a third groove portion provided on the transition portion, and two ends of the third groove portion are respectively connected to the first groove portion and the second groove portion, so that the first fitting groove sequentially extends through the first step portion, the transition portion, and the second step portion; and / or sequentially extends through the second step portion, the transition portion, and the first step portion.

[0017] In some embodiments, the first step portion and the second step portion are arranged in sequence in a first direction, and at least one of the first groove portion and the second groove portion includes a longitudinal groove segment extending in the first direction and a transverse groove segment extending in a second direction orthogonal to the first direction.

[0018] In some embodiments, the box cover includes two first side edges arranged opposite to each other along a first direction, and two second side edges arranged opposite to each other along a second direction orthogonal to the first direction, the first step portion and the second step portion are arranged sequentially along the first direction, and both ends of the first groove portion extend to the second side edges on both sides of the first step portion, and both ends of the second groove portion extend to the second side edges on both sides of the second step portion.

[0019] In some embodiments, the electric control box includes:

[0020] A pressure cover is arranged on a side of the box cover away from the accommodating cavity and connected to the box cover. The pressure cover at least covers the first matching groove to clamp a heat dissipation pipe matched with the first matching groove together with the box cover.

[0021] In some embodiments, a second matching groove is formed on the pressure cover, and the second matching groove is formed on a side surface of the pressure cover facing the box cover and is open toward the box cover.

[0022] In some embodiments, the pressure cover includes a plurality of sub-covers arranged at intervals; or, the pressure cover has a hollow area arranged staggered with the first matching groove.

[0023] In some embodiments, the box body is an integrally formed part, and the box cover is an integrally formed part; and / or, the box body is a sealed box body.

[0024] In some embodiments, the box body is made of non-metallic material.

[0025] In some embodiments, a support column protrudes from a side surface of the box cover facing the accommodating cavity, and the support column is used to support and be connected to a substrate of the circuit board.

[0026] In some embodiments, the support column is used to connect to a substrate of the circuit board.

[0027] In some embodiments, the electrical control box includes a circuit board disposed in the accommodating cavity, the circuit board includes a substrate and devices, at least some of the devices are disposed on a side of the substrate facing the box cover; and / or the electrical control box includes a heat dissipation pipe embedded in the mating part.

[0028] The air conditioner according to the second aspect of the utility model comprises a refrigerant circulation system and an electric control box according to the first aspect of the utility model, wherein the refrigerant circulation system is used to provide cooling to the heat dissipation pipe embedded in the matching portion.

[0029] According to the air conditioner of the present utility model, the refrigerant circulation system is used to provide cooling capacity to the heat dissipation tube for heat exchange with the box body, without the need to additionally provide a heat dissipation member to cooperate with the electric control box, which can accelerate the heat dissipation of the electric control box, reduce the manufacturing cost, and improve the working reliability of the air conditioner.

[0030] In some embodiments, the electric control box is arranged in the outdoor unit of the air conditioner, at least part of the refrigerant pipe in the outdoor unit serves as the heat dissipation tube and is embedded in the fitting part; and / or, the refrigerant circulating in the refrigerant circulation system is a combustible refrigerant.

[0031] The additional aspects and advantages of the present utility model will be partly given in the following description, partly become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is an exploded view of the structure of an electric control box according to an embodiment of the present utility model;

[0033] Figure 2 is a schematic structural view of a box cover according to an embodiment of the present utility model;

[0034] Figure 3 is a partial schematic structural view of an electric control box according to an embodiment of the present utility model;

[0035] Figure 4 is a schematic structural view of the box cover from another angle according to an embodiment of the present utility model;

[0036] Figure 5 is an exploded view of the structure of a box cover, a gland and a heat dissipation tube according to an embodiment of the present utility model;

[0037] Figure 6 is a schematic structural view of an electric control box according to an embodiment of the present utility model;

[0038] Figure 7 is according to Figure 6 a schematic structural view of the box cover of the electric control box shown in the example;

[0039] Figure 8 is a schematic structural view of a box cover and a heat dissipation tube according to an embodiment of the present utility model;

[0040] Figure 9 is an exploded view of the structure of a heat conduction plate, a box cover, a gland and a heat dissipation tube according to an embodiment of the present utility model;

[0041] Figure 10 is a schematic structural view of an electric control box according to another embodiment of the present utility model;

[0042] Figure 11 is according toFigure 10 Schematic structural diagram of the lid of the electric control box of the illustrated example;

[0043] Figure 12 Schematic structural diagram of the electric control box according to another embodiment of the present utility model;

[0044] Figure 13 It is according to Figure 12 Schematic structural diagram of the lid of the electric control box of the illustrated example;

[0045] Figure 14 Exploded view of a partial structure of the electric control box according to an embodiment of the present utility model;

[0046] Figure 15 Schematic structural diagram of the electric control box according to another embodiment of the present utility model;

[0047] Figure 16 It is according to Figure 15 Schematic structural diagram of the lid of the electric control box of the illustrated example;

[0048] Figure 17 Schematic structural diagram of the refrigerant circulation system according to an embodiment of the present utility model.

[0049] Reference numerals:

[0050] Electric control box 100; First direction X; Second direction Y;

[0051] Box body 1; Accommodating cavity 1a; Lid 11; Fitting portion 111; First fitting groove 111a; First groove portion 1111; Second groove portion 1112; Longitudinal groove section 1111a; Transverse groove section 1111b; Third groove portion 1113; First side 11a; Second side 11b; Heat transfer protrusion 112; First protrusion 1121; Column body 112a; Sheet body 112b; Heat sink group 1122; First step portion 113; Distance H1 from the first step portion to the substrate of the circuit board; Second step portion 114; Distance H2 from the second step portion to the substrate of the circuit board; Transition portion 115; Support pillar 116; Box main body 12; End plate 121; Enclosing plate 122; Openings 12a;

[0052] Circuit board 2; Substrate 21; Devices 22; First device 221; Second device 222;

[0053] Thermal conductive structure member 3; Thermal conductive plate 3a;

[0054] Pressing cover 4; Second fitting groove 41; Sub-lid 4a; Hollowed-out area 42;

[0055] Heat dissipation tube 5;

[0056] Refrigerant circulation system 200; compressor 201; outdoor heat exchanger 202; indoor heat exchanger 203; throttling device 204; reversing assembly 205. Detailed implementation mode

[0057] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0058] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can recognize the applicability of other processes and / or the use of other materials.

[0059] The electronic control box 100 according to the embodiment of the first aspect of the present invention will be described below with reference to the drawings.

[0060] The electronic control box 100 according to the embodiment of the present invention, as Figure 1 and Figure 2 shown, the electronic control box 100 includes a box body 1. The box body 1 includes a box main body 12 and a box cover 11. The box main body 12 includes an end plate 121 and a surrounding plate 122. The surrounding plate 122 is disposed around the end plate 121 to form a receiving cavity 1a for receiving the circuit board 2 between the end plate 121 and the surrounding plate 122. One end of the surrounding plate 122 away from the end plate 121 defines an opening 12a. The box cover 11 is disposed on the side of the surrounding plate 122 away from the end plate 121 and is connected to the surrounding plate 122 to cover the opening 12a. The box cover 11 is made of a metal material, and a mating portion 111 for embedding the heat dissipation tube 5 is formed on the box cover 11.

[0061] The circuit board 2 is disposed in the receiving cavity 1a formed in the electronic control box 100. When the circuit board 2 works, heat will be generated. The box body 1 can transfer the heat of the circuit board 2 to the external environment to dissipate heat from the circuit board 2. It should be noted that the heat of the circuit board 2 can be indirectly transferred to the box body 1 through heat exchange with air, or directly transferred to the box body 1 by means of heat radiation.

[0062] The lid 11 that defines the accommodation cavity 1a is made of metal. The lid 11 has good heat conductivity, which is beneficial to improving the heat dissipation effect of the electronic control box 100. Moreover, the lid 11 seals the open end 12a, and the lid 11 has a large area, so the heat dissipation area is large, which is beneficial to improving the heat dissipation speed of the electronic control box 100.

[0063] The lid 11 is a metal part, and the lid 11 has relatively high structural strength, which can improve the impact resistance of the electronic control box 100 and is beneficial to improving the working safety of the electronic control box 100.

[0064] A mating portion 111 for embedding the heat dissipation pipe 5 is formed on the lid 11. The heat dissipation pipe 5 is embedded in the mating portion 111. By using the heat dissipation pipe 5 to cool the lid 11, the heat conduction between the lid 11 and the heat in the accommodation cavity 1a can be accelerated, thereby improving the heat dissipation efficiency of the electronic control box 100. And by providing the mating portion 111, the arrangement stability of the heat dissipation pipe 5 arranged on the lid 11 can be improved, the situation where the heat dissipation pipe 5 is separated from the lid 11 when being impacted can be improved, and the reliability of heat exchange between the heat dissipation pipe 5 and the lid 11 can be enhanced.

[0065] By arranging the mating portion 111 for embedding the heat dissipation pipe 5 on the lid 11, after the lid 11 and the box body 12 are assembled in advance, the heat dissipation pipe 5 can be assembled with the box body 1, thereby ensuring the tightness of the box body 1, improving the working safety of the electronic control box 1000, and also enabling the rapid assembly of the heat dissipation pipe 5 and the box body 1.

[0066] For the electronic control box 100 according to the embodiment of the present invention, by setting the lid 11 as a metal part and arranging the heat dissipation pipe 5 on the lid 11, the heat transfer efficiency between the lid 11 and the circuit board 2 can be increased, and the electronic control box 100 has good heat dissipation performance.

[0067] In some embodiments of the present invention, as Figure 3 shown, a heat transfer protrusion 112 protrudes from the surface of the lid 11 facing the accommodation cavity 1a.

[0068] By providing the heat transfer protrusion 112, the distance between the lid 11 and the circuit board 2 can be effectively shortened, and the contact area between the heat transfer protrusion 112 and the air in the accommodation cavity 1a can be increased, thereby improving the heat exchange efficiency between the lid 11 and the circuit board 2 and further improving the heat dissipation performance of the electronic control box 100.

[0069] It should be noted that the heat transfer protrusion 112 is a part of the lid 11. Compared with separately arranging the heat transfer protrusion 112 on the surface of the lid 11 facing the accommodation cavity 1a, the integrity of the lid 11 is good, and the manufacturing difficulty of the lid 11 can also be reduced. And since the heat transfer protrusion 112 is a part of the lid 11, the heat transfer protrusion 112 also has good heat conductivity, which is beneficial to the heat dissipation of the electronic control box 100.

[0070] In some embodiments of the present utility model, as Figure 2 and Figure 3 shown, at least a part of the heat transfer protrusion 112 and the mating portion 111 are disposed opposite to each other along the wall thickness direction of the lid 11.

[0071] The heat dissipation tube 5 is embedded in the mating portion 111. Therefore, at least a part of the heat transfer protrusion 112 and the heat dissipation tube 5 are disposed opposite to each other along the wall thickness direction of the lid 11, which can shorten the heat transfer path from the heat transfer protrusion 112 to the heat dissipation tube 5 and is beneficial to accelerating the heat dissipation of the accommodation cavity 1a. Among them, the shape of the mating portion 111 is not limited. It can be in the form of a through hole extending along the axial direction of the heat dissipation tube 5 and open at both axial ends, or in the form of a tube groove extending along the axial direction of the heat dissipation tube 5 and open at both axial ends and the radial circumferential side respectively.

[0072] In some embodiments of the present utility model, as Figure 2 and Figure 3 shown, the lid 11 is in the shape of a stepped plate and includes a first stepped portion 113 and a second stepped portion 114. The distance H1 from the first stepped portion 113 to the substrate 21 of the circuit board 2 is greater than the distance H2 from the second stepped portion 114 to the substrate 21 of the circuit board 2. The heat transfer protrusion 112 includes a first protrusion 1121 protruding from the first stepped portion 113 towards the accommodation cavity 1a.

[0073] The distance H1 from the first stepped portion 113 to the substrate 21 is relatively large, and the distance between the lid 11 and the circuit board 2 at the first stepped portion 113 is relatively far. Therefore, by providing the heat transfer protrusion 112 protruding towards the accommodation cavity 1a at the first stepped portion 113, the distance between the lid 11 and the circuit board 2 at the first stepped portion 113 can be shortened, which is beneficial to accelerating the heat dissipation of the circuit board 2.

[0074] In some embodiments of the present utility model, as Figure 1 and Figure 3 shown, the electronic control box 100 includes a circuit board 2 disposed in the accommodation cavity 1a. The circuit board 2 includes a substrate 21 and a first device 221. The first device 221 is disposed on the side of the substrate 21 facing the lid 11 and is opposite to the first stepped portion 113. The first protrusion 1121 transfers heat in contact with the first device 221 through a first heat-conducting medium (non-gas).

[0075] Optionally, the first heat-conducting medium can be a heat-conducting pad or a heat-conducting substrate with better heat conductivity, etc. The first protrusion 1121 and the first device 221 are in indirect contact heat exchange through the heat-conducting pad or the heat-conducting substrate to accelerate the heat exchange between the first protrusion 1121 and the first device 221; or, alternatively, the first heat-conducting medium can also be a coating-like structure such as heat-conducting silicone grease. Or, the first heat-conducting medium can also be a combined form including several of the above heat-conducting media, which can be selected according to actual needs.

[0076] In some embodiments of the present utility model, the first heat-conducting medium is an insulating heat-conducting medium. A high voltage is applied to the circuit board 2. Since the box cover 11 is made of metal, an insulating heat-conducting medium is provided between the first protrusion 1121 and the first device 221, which can prevent conduction between the box cover 11 and the circuit board 2 and improve the safety of use of the electric control box 100.

[0077] In some specific embodiments of the present utility model, the first heat-conducting medium is thermal grease.

[0078] In some embodiments of the present utility model, as Figure 1 and Figure 3 shown, the circuit board 2 further includes a second device 222. The second device 222 is disposed on one side of the substrate 21 facing the box cover 11 and is opposite to the second step portion 114. A heat-conducting structure member 3 is interposed between the second step portion 114 and the second device 222.

[0079] A heat-conducting structure member 3 is interposed between the second step portion 114 and the second device 222. Compared with air, the heat-conducting structure member 3 has a higher heat transfer efficiency. By providing the heat-conducting structure member 3, the heat transfer speed between the second device 222 and the second step portion 114 can be improved, which is beneficial to accelerating the heat dissipation of the second device 222 and improving the heat dissipation efficiency of the circuit board 2.

[0080] In some embodiments of the present utility model, as Figure 1 and Figure 3 shown, the heat-conducting structure member 3 includes a heat-conducting plate 3a fixed to the substrate 21 or the second step portion 114. A second heat-conducting medium (non-gas) is provided between the heat-conducting plate 3a and the second device 222. The second step portion 114 transfers heat to the second device 222 through the heat-conducting plate 3a and the second heat-conducting medium.

[0081] Optionally, the second heat-conducting medium can be a heat-conducting pad or a heat-conducting substrate with better heat conductivity, etc. The heat-conducting plate 3a and the second device 222 indirectly contact and exchange heat through the heat-conducting pad or the heat-conducting substrate, which can reduce the wear between the heat-conducting plate 3a and the second device 222; or, alternatively, the second heat-conducting medium can also be a coating-like structure such as thermal grease. Or, the second heat-conducting medium can also be a combination form including several of the above-mentioned heat-conducting media, which can be selected according to actual needs.

[0082] In some embodiments of the present utility model, at least one of the second heat-conducting medium and the heat-conducting plate 3a is an insulating heat-conducting member. A high voltage is applied to the circuit board 2. Since the box cover 11 is made of metal, an insulating heat-conducting member is provided between the second step portion 114 and the second device 222, which can prevent conduction between the box cover 11 and the circuit board 2 and improve the safety of use of the electric control box 100.

[0083] In some specific embodiments of the present utility model, the second heat-conducting medium is thermal grease.

[0084] It can be understood that the distance H1 from the first step portion 113 to the substrate 21 of the circuit board 2 is greater than the distance H2 from the second step portion 114 to the substrate 21 of the circuit board 2. The space available for arranging the first device 221 is greater than the space for arranging the second device 222. Therefore, optionally, the first device 221 includes a passive device 22 with a relatively large volume, and the second device 222 includes a power device 22 with a relatively small volume.

[0085] In some other embodiments of the present utility model, as Figure 5 shown, the heat-conducting structural member 3 is configured as a metal plate integrally formed with the second step portion 114. The metal plate and the second device 222 are provided with a second heat-conducting medium, and the second device 222 transfers heat to the metal plate through the second heat-conducting medium.

[0086] In some embodiments of the present utility model, as Figure 6 and Figure 10 shown, the heat-transfer protrusion 112 includes a plurality of columns 112a arranged at intervals. The columns 112a have relatively high structural strength, which can reduce the occurrence of the heat-transfer protrusion 112 being damaged or broken by impact.

[0087] Optionally, the column 112a is a cylinder, a prism, or a conical column with a gradually decreasing cross-section in the direction towards the accommodation cavity 1a, which can be selected according to the available space in the accommodation cavity 1a.

[0088] In some embodiments of the present utility model, as Figure 12 shown, the heat-transfer protrusion 112 includes a plurality of sheets 112b arranged at intervals. The sheets 112b occupy relatively little space, can effectively utilize the limited space in the accommodation cavity 1a, realize a compact heat dissipation design, increase the contact area with the air in the accommodation cavity 1a, and improve the heat dissipation effect.

[0089] As Figure 14 and Figure 16 shown, a plurality of sheets 112b arranged in parallel form a heat sink group 1122. The heat-transfer protrusion 112 includes a plurality of heat sink groups 1122, and the sheets 112b in different heat sink groups 1122 are not arranged in parallel.

[0090] The circuit board 2 includes a substrate 21 and devices 22. A plurality of devices 22 are arranged on the substrate 21. The heat sink group 1122 composed of a plurality of sheets 112b is arranged opposite to the devices 22 on the substrate 21, so as to dissipate heat from the devices 22 on the substrate 21 specifically, which can improve the heat dissipation effect. And the sheets 112b in different heat sink groups 1122 can be set according to actual needs, improving the design flexibility to adapt to the complex space layout in the accommodation cavity 1a and better meeting the heat dissipation requirements of the devices 22.

[0091] In some embodiments of the present utility model, as Figure 2 shown, the mating portion 111 is formed as a first mating groove 111a, and the first mating groove 111a is formed on a surface of the lid 11 away from the accommodation cavity 1a and opens in a direction away from the accommodation cavity 1a.

[0092] The first mating groove 111a is located on a surface of the lid 11 away from the accommodation cavity 1a. After the lid 11 and the box body 12 are pre-assembled, the heat dissipation pipe 5 can be assembled with the box body 1, thereby ensuring the tightness of the box body 1, improving the working safety of the electronic control box 1000, and also enabling the rapid assembly of the heat dissipation pipe 5 and the box body 1.

[0093] In some embodiments of the present utility model, as Figure 1 and Figure 2 shown, the lid 11 is in the shape of a stepped plate and includes a first stepped portion 113 and a second stepped portion 114 at different distances from the substrate 21 of the circuit board 2. The first mating groove 111a includes a first groove portion 1111 provided on the first stepped portion 113 and a second groove portion 1112 provided on the second stepped portion 114.

[0094] A first groove portion 1111 for embedding the heat dissipation pipe 5 is provided on the first stepped portion 113, and a second groove portion 1112 for embedding the heat dissipation pipe 5 is provided on the second stepped portion 114. The heat dissipation pipe 5 can be embedded in the first groove portion 1111 on the first stepped portion 113, and the heat dissipation pipe 5 can also be embedded in the second groove portion 1111 on the second stepped portion 114, which can be selected according to actual needs.

[0095] By providing the first mating groove 111a on both the first stepped portion 113 and the second stepped portion 114, the heat exchange speed between the first stepped portion 113 and the second stepped portion 114 and the circuit board 2 is relatively fast, improving the heat dissipation speed of the circuit board 2.

[0096] In some embodiments of the present utility model, as Figure 1 and Figure 2 shown, the lid 11 further includes a transition portion 115 connected between the first stepped portion 113 and the second stepped portion 114. The first mating groove 111a includes a third groove portion 1113 provided on the transition portion 115, and both ends of the third groove portion 1113 are respectively connected to the first groove portion 1111 and the second groove portion 1112, so that the first mating groove 111a extends sequentially through the first stepped portion 113, the transition portion 115 and the second stepped portion 114; and / or extends sequentially through the second stepped portion 114, the transition portion 115 and the first stepped portion 113.

[0097] As Figure 2As shown, the first mating groove 111a on the lid 11 is an integral continuous groove. The heat dissipation pipe 5 can sequentially pass through the first step portion 113, the transition portion 115, and the second step portion 114 along the extending direction of the first mating groove 111a to exchange heat with the first step portion 113, the transition portion 115, and the second step portion 114, which can accelerate the heat exchange speed between the first step portion 113, the transition portion 115, and the second step portion 114 and the circuit board 2 and improve the heat dissipation speed of the circuit board 2. The first mating groove 111a being constructed as an integral continuous groove facilitates the arrangement of the heat dissipation pipe 5. The extension of one heat dissipation pipe 5 can cool the first step portion 113, the transition portion 115, and the second step portion 114.

[0098] Optionally, the first mating groove 111a can sequentially extend through the first step portion 113, the transition portion 115, and the second step portion 114. The heat dissipation pipe 5 extends into the first step portion 113 and extends out from the second step portion 114 after passing through the transition portion 115.

[0099] Or, alternatively, the first mating groove 111a sequentially extends through the second step portion 114, the transition portion 115, and the first step portion 113. The heat dissipation pipe 5 extends into the second step portion 114 and extends out from the first step portion 113 after passing through the transition portion 115.

[0100] Or, again alternatively, as Figure 2 shown, the first mating groove 111a can sequentially extend through the first step portion 113, the transition portion 115, the second step portion 114, the transition portion 115, and the first step portion 113. The first mating groove 111a has a turning portion. The heat dissipation pipe 5 extends into the first step portion 113, turns at the second step portion 114 after passing through the transition portion 115, then extends towards the transition portion 115, and then extends out from the first step portion 113.

[0101] In some embodiments of the present utility model, as Figure 2 and Figure 7 shown, the first step portion 113 and the second step portion 114 are sequentially arranged along the first direction X. At least one of the first groove portion 1111 and the second groove portion 1112 includes a longitudinal groove segment 1111a extending along the first direction X and a transverse groove segment 1111b extending along a second direction Y orthogonal to the first direction X.

[0102] By providing the longitudinal groove segment 1111a and the transverse groove segment 1111b, the first mating groove 111a is formed into a groove with a turning shape. The heat dissipation pipe 5 is embedded in the first mating groove 111a. As Figure 8 and Figure 9 shown, the contact area between the heat dissipation pipe 5 and the lid 11 can be increased, thereby improving the heat exchange effect between the heat dissipation pipe 5 and the lid 11. Among them, the number and positions of the longitudinal groove segment 1111a and the transverse groove segment 1111b can be selected according to actual needs.

[0103] In some embodiments of the present utility model, as Figure 7 shown, the second groove portion 1112 includes two longitudinal groove segments 1111a extending along the first direction X, and a transverse groove segment 1111b extending along the second direction Y. The transverse groove segment 1111b is connected between the two longitudinal groove segments 1111a, so that the second groove portion 1112 is configured as a 'C'-shaped structure. As Figure 7 and Figure 8 shown, the heat dissipation tube 5 rotates on the second step portion 114, extends from the second step portion 114 towards the first step portion 113 and protrudes from the first step portion 113.

[0104] In one embodiment of the present utility model, as Figure 9 shown, the first groove portion 1111 includes two transverse groove segments 1111b extending along the second direction Y, and the second groove portion 1112 includes two transverse groove segments 1111b extending along the second direction Y, increasing the contact area between the heat dissipation tube 5 and the lid 11.

[0105] Figure 10 The lid 11 shown in Figure 9 is the lid 11 of the electric control box 100 in the embodiment shown. The arrangement position of the heat transfer protrusion 112 on the first step portion 113 is oppositely arranged in the thickness direction of the lid 11 to the extension range of the first groove portion 1111.

[0106] In some embodiments of the present utility model, as Figure 2 shown, the lid 11 includes two first side edges 11a oppositely arranged along the first direction X, and two second side edges 11b oppositely arranged along the second direction Y orthogonal to the first direction X. The first step portion 113 and the second step portion 114 are arranged in sequence along the first direction X. The insertion end of the heat dissipation tube 5 extends into the first step portion 113 from the first side edge 11a, and the protruding end of the heat dissipation tube 5 protrudes from the first step portion 113 from the same first side edge 11a.

[0107] In other embodiments of the present utility model, as Figure 11 shown, the lid 11 includes two first side edges 11a oppositely arranged along the first direction X, and two second side edges 11b oppositely arranged along the second direction Y orthogonal to the first direction X. The first step portion 113 and the second step portion 114 are arranged in sequence along the first direction X. Both ends of the first groove portion 1111 extend to the second side edges 11b on both sides of the first step portion 113, and both ends of the second groove portion 1112 extend to the second side edges 11b on both sides of the second step portion 114.

[0108] The first groove portion 1111 on the first step portion 113 and the second groove portion 1112 on the second step portion 114 are two separate grooves. Optionally, there is one heat dissipation tube 5, and the same heat dissipation tube 5 is embedded in the first groove portion 1111 and the second groove portion 1112. The extending end of the heat dissipation tube 5 extends into the first second side 11b of the first step portion 113 and extends out from the second second side 11b of the first step portion 113. Subsequently, the rotation direction of the heat dissipation tube 5 extends into the second second side 11b of the second step portion 114 and then extends out from the first second side 11b of the second step portion 114. Of course, the heat dissipation tube 5 can also extend into from the second step portion 114 and extend out from the first step portion 113.

[0109] Alternatively, optionally, there are two heat dissipation tubes 5, and the two heat dissipation tubes 5 are respectively embedded in the first groove portion 1111 and the second groove portion 1112. One heat dissipation tube 5 extends into from one second side 11b of the first step portion 113 and extends out from the other second side 11b of the first step portion 113, and the other heat dissipation tube 5 extends into from one second side 11b of the second step portion 114 and extends out from the other second side 11b of the second step portion 114.

[0110] In some embodiments of the present utility model, as Figure 1 and Figure 7 shown, the electric control box 100 includes: a gland 4, the gland 4 is arranged on the side of the box cover 11 away from the accommodation cavity 1a and is connected to the box cover 11. The gland 4 at least covers the first fitting groove 111a and jointly clamps the heat dissipation tube 5 that cooperates with the first fitting groove 111a with the box cover 11.

[0111] By arranging the gland 4 and the box cover 11 to jointly clamp the heat dissipation tube 5, the arrangement stability of the heat dissipation tube 5 can be improved, the heat dissipation tube 5 can be prevented from being disengaged from the first fitting groove 111a due to impact, and the contact heat transfer stability between the heat dissipation tube 5 and the box cover 11 can be improved. The gland 4 can also play a protective role for the heat dissipation tube 5 embedded in the first fitting groove 111a and reduce the invasion of pollutants such as dust.

[0112] In some embodiments of the present utility model, as Figure 6 shown, a second fitting groove 41 is formed on the gland 4. The second fitting groove 41 is formed on the surface of the gland 4 facing the box cover 11 and is open in the direction facing the box cover 11.

[0113] The heat dissipation tube 5 embedded in the first fitting groove 111a is accommodated in the second fitting groove 41. By forming the second fitting groove 41 on the gland 4, the cooperation degree with the heat dissipation tube 5 is better, and the heat dissipation tube 5 can be prevented from being damaged by squeezing the heat dissipation tube 5.

[0114] In some embodiments of the present utility model, as Figure 13As shown, the pressure cover 4 includes a plurality of sub-covers 4a arranged at intervals. Compared with the arrangement of an integral pressure cover 4 and the box cover 11 to clamp the heat pipe 5 in the first matching groove 111a, the plurality of sub-covers 4a and the box cover 11 to clamp a plurality of parts of the heat pipe 5, respectively, can reduce the manufacturing cost of the pressure cover 4 while ensuring the stability of the arrangement of the heat pipe 5.

[0115] In some embodiments of the present invention, Figure 13 As shown, the gland 4 includes two sub-covers 4a, one of which is connected to the first step portion 113 of the box cover 11, and the other sub-cover 4a is connected to the second step portion 114 of the box cover 11. The two sub-covers 4a respectively clamp and fix the heat pipe 5 and the main heat exchange part of the box cover 11, which can reduce the manufacturing cost of the gland 4 while ensuring the stability of the arrangement of the heat pipe 5.

[0116] In some embodiments of the present invention, Figure 15 As shown, the pressure cover 4 has a hollow area 42 staggered with the first matching groove 111 a, which can reduce the manufacturing cost of the pressure cover 4 while ensuring the stability of the arrangement of the heat dissipation pipe 5.

[0117] In some embodiments of the present invention, the gland 4 is made of insulating material, which can improve the electrical safety of the electric control box 100 and save the manufacturing cost of the electric control box 100 .

[0118] In some embodiments of the present invention, Figure 4 As shown, the box body 12 is an integrally formed part, and the box cover 11 is an integrally formed part; and / or, the box body 1 is a closed box body, that is, the box body 1 does not have a ventilation area for connecting the inside and outside of the box body 1.

[0119] By designing the electric control box 100 as a sealed box body and the accommodating chamber 1a as a sealed chamber, it is possible to effectively prevent flammable refrigerant or water from entering the accommodating chamber 1a, thereby ensuring the electrical safety of the electric control box 100.

[0120] It is worth noting that with the improvement of environmental protection requirements, the refrigerant in air conditioners, R290, is gradually replacing traditional refrigerants such as R32 in air conditioners due to its cleanliness, no damage to the ozone layer, and minimal impact on the greenhouse effect. However, R290 refrigerant is flammable. When R290 refrigerant leaks at low concentrations, it may cause combustion and explosion when encountering low-energy sparks. Therefore, the safety performance of R290 refrigerant must be guaranteed.

[0121] The electric control box 100 of the embodiment of the utility model is a sealed box body, and the accommodating chamber 1a is a sealed chamber, which can effectively prevent the flammable refrigerant from entering the accommodating chamber 1a, so it can be used in air conditioners using R290 refrigerant.

[0122] In some embodiments of the present utility model, the box body 12 is made of a non-metallic material. This can improve the electrical safety of the electronic control box 100 and save the manufacturing cost of the electronic control box 100. Exemplarily, the box body 12 is a plastic part.

[0123] In some embodiments of the present utility model, the box cover 11 is an integrally formed part. The box cover 11 has strong structural integrity, which can improve the structural strength of the box cover 11 and also improve the sealing performance of the electronic control box 100.

[0124] In some embodiments of the present utility model, the box body 12 is in the shape of a box 1 with one end open, and the box cover 11 is in the shape of a stepped plate and covers the open end of the box body 12, wherein the box body 12 is made of an insulating material. The box cover 11 made of a metal material has a smaller volume, and the box body 12 made of an insulating material has a larger volume, thereby saving the manufacturing cost.

[0125] In some embodiments of the present utility model, the box cover 11 and the box body 12 are coupled and fixedly connected by fasteners, which improves the connection stability between the box cover 11 and the box body 12.

[0126] In some embodiments of the present utility model, as Figure 3 and Figure 4 shown, on the side surface of the box cover 11 facing the accommodation cavity 1a, there protrudes a support post 116, and the support post 116 is used to support and connect to the substrate 21 of the circuit board 2.

[0127] As Figure 3 shown, the box cover 11 includes a first stepped portion 113 and a second stepped portion 114. The distance H1 from the first stepped portion 113 to the substrate 21 is greater than the distance H2 from the second stepped portion 114 to the substrate 21. Support posts 116 are provided at the corner portions of both the first stepped portion 113 and the second stepped portion 114. The heights of the two support posts 116 on the first stepped portion 113 are greater than the heights of the two support posts 116 on the second stepped portion 114, so that the ends of the support posts 116 facing the substrate 21 of the circuit board 2 are at the same height, improving the support stability for the substrate 21 of the circuit board 2.

[0128] In some embodiments of the present utility model, as Figure 3 shown, the support post 116 is used to connect to the substrate 21 of the circuit board 2, improving the layout stability for the substrate 21 of the circuit board 2.

[0129] In some embodiments of the present utility model, as Figure 3 shown, the electronic control box 100 includes a circuit board 2 disposed in the accommodation cavity 1a. The circuit board 2 includes a substrate 21 and components 22, and at least part of the components 22 are disposed on the side of the substrate 21 facing the box cover 11.

[0130] The lid 11 of the box is used to dissipate heat from the circuit board 2. Since the lid 11 has good heat conduction performance, the device 22 is arranged on one side of the substrate 21 in the thickness direction facing the lid 11, which is beneficial to improving the heat dissipation effect of the device 22. Moreover, the space on the side of the substrate 21 facing the lid 11 is relatively large. Arranging the device 22 on the side of the substrate 21 facing the lid 11 is convenient for assembly and can reduce the manufacturing difficulty of the electric control box 100.

[0131] In some other embodiments of the present invention, the box body 1 further includes a box main body 12. The box main body 12 and the lid 11 are arranged opposite to each other in the thickness direction of the substrate 21. The circuit board 2 includes a substrate 21 and a device 22. At least part of the device 22 is arranged on one side of the substrate 21 facing the lid 11, and at least part of the device 22 is arranged on one side of the substrate 21 facing the box main body 12.

[0132] The device 22 arranged on the side of the substrate 21 facing the box main body 12 does not occupy the layout space of the substrate 21 facing the lid 11, thereby improving the functionality of the electric control box 100. The lid 11 dissipates heat from the accommodation cavity 1a and can also dissipate heat from the device 22 arranged on the side of the substrate 21 facing the box main body 12, which can also improve the working reliability of the device 22 arranged on the side of the substrate 21 facing the box main body 12.

[0133] In some embodiments of the present invention, the electric control box 100 includes a heat dissipation tube 5 embedded in the fitting portion 111. As a part of the electric control box 100, the heat dissipation tube 5 can improve the integrity of the electric control box 100 and simplify the assembly process.

[0134] In a second aspect, an embodiment of the present invention provides an air conditioner, which includes a refrigerant circulation system and the electric control box 100 according to the first aspect embodiment of the present invention above. The refrigerant circulation system 200 is used to provide cooling capacity to the heat dissipation tube 5 embedded in the fitting portion 111.

[0135] Using the refrigerant circulation system 200 to provide cooling capacity to the heat dissipation tube 5 for heat exchange with the box body 1 eliminates the need to additionally provide a heat dissipation component to cooperate with the electric control box 100, which can accelerate the heat dissipation of the electric control box 100, reduce the manufacturing cost, and improve the working reliability of the air conditioner.

[0136] In some embodiments of the present invention, the refrigerant tube in the refrigerant circulation system 200 serves as the heat dissipation tube 5 and is embedded in the fitting portion 111.

[0137] Using the refrigerant tube in the refrigerant circulation system 200 as the heat dissipation tube 5 to cooperate with the fitting portion 111 can improve the integrity and sealing performance of the refrigerant tube in the refrigerant circulation system 200 and the heat dissipation tube 5, and reduce the occurrence of refrigerant leakage.

[0138] In some other embodiments of the present utility model, the refrigerant pipe in the refrigerant circulation system 200 is connected to the heat dissipation pipe 5 embedded in the fitting portion 111, and the refrigerant in the refrigerant circulation system 200 is delivered to the heat dissipation pipe 5 to provide cooling capacity to the heat dissipation pipe 5.

[0139] By separately arranging the heat dissipation pipe 5 and the refrigerant circulation system 200 and connecting the refrigerant pipe of the refrigerant circulation system 200 to the heat dissipation pipe 5 after the installation of the refrigerant circulation system 200 and the heat dissipation pipe 5 is completed, the manufacturing difficulty of the heat dissipation pipe 5 can be reduced.

[0140] In some embodiments of the present utility model, the electric control box 100 is arranged in the outdoor unit of the air conditioner, and at least part of the refrigerant pipe in the outdoor unit serves as the heat dissipation pipe 5 and is embedded in the fitting portion 111.

[0141] For example, as Figure 17 shown, the refrigerant circulation system 200 includes a compressor 201, an outdoor heat exchanger 202, an indoor heat exchanger 203, a throttling device 204 and a reversing assembly 205. The reversing assembly 205 is used to switch one of the outdoor heat exchanger 202 and the indoor heat exchanger 203 to be used as a condenser while the other is used as an evaporator.

[0142] As Figure 17 shown, the solid line with an arrow is the circulation path of the refrigerant in the refrigerant circulation system 200 when the air conditioner cools the indoor space. At this time, the reversing assembly 205 connects the exhaust port of the compressor 201 to the outdoor heat exchanger 202 and connects the suction port of the compressor 201 to the indoor heat exchanger 203. The outdoor heat exchanger 202 serves as a condenser, and the indoor heat exchanger 203 serves as an evaporator.

[0143] As Figure 17 shown, the dashed line with an arrow is the circulation path of the refrigerant in the refrigerant circulation system 200 when the air conditioner heats the indoor space. At this time, the reversing assembly 205 connects the exhaust port of the compressor 201 to the indoor heat exchanger 203 and connects the suction port of the compressor 201 to the outdoor heat exchanger 202. The outdoor heat exchanger 202 serves as an evaporator, and the indoor heat exchanger 203 serves as a condenser.

[0144] In some embodiments of the present utility model, as Figure 17 shown, the refrigerant pipe located in the outdoor unit and connected between the throttling device 204 and the indoor heat exchanger 203 serves as the heat dissipation pipe 5 and is fitted to the fitting portion 111.

[0145] In some other embodiments of the present utility model, the refrigerant pipe located in the outdoor unit and connected between the reversing assembly 205 and the suction port of the compressor 201 can also serve as the heat dissipation pipe 5 and be fitted to the fitting portion 111.

[0146] Of course, the present application is not limited thereto. In other embodiments of the present application, the refrigerant circulation system 200 may also not include the commutation component 205 and be a single-cooling system.

[0147] In some embodiments of the present invention, the refrigerant circulating in the refrigerant circulation system 200 is a combustible refrigerant.

[0148] By designing the electric control box 100 as an airtight box and arranging the heat dissipation pipe 5 on the side of the box cover 11 away from the accommodation cavity 1a to dissipate heat from the electric control box 100, that is, arranging the heat dissipation pipe 5 outside the electric control box 100, the situation of the combustible refrigerant entering the electric control box 100 can be reduced. While improving the heat dissipation efficiency of the electric control box 100, the use safety can also be improved.

[0149] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0150] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0151] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0152] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0153] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0154] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An electric control box, characterized in that: include: A box body, the box body includes a box body and a box cover, the box body includes an end plate and a surrounding plate, the surrounding plate is arranged around the end plate to form a accommodating cavity for accommodating a circuit board between the end plate and the surrounding plate, an end of the surrounding plate away from the end plate defines an opening, the box cover is arranged on a side of the surrounding plate away from the end plate, and is connected to the surrounding plate to cover the opening, the box cover is made of metal, and a matching portion for embedding a heat dissipation pipe is formed on the box cover.

2. The electric control box according to claim 1, characterized in that: A heat transfer protrusion is protruded from a surface of one side of the box cover facing the accommodating cavity.

3. The electric control box according to claim 2, characterized in that: At least a portion of the heat transfer protrusion is arranged opposite to the matching portion along the wall thickness direction of the box cover.

4. The electric control box according to claim 2, characterized in that: The box cover is in the shape of a stepped plate and includes a first step portion and a second step portion, the distance from the first step portion to the substrate of the circuit board is greater than the distance from the second step portion to the substrate of the circuit board, and the heat transfer protrusion includes a first protrusion protruding from the first step portion toward the accommodating cavity.

5. The electric control box according to claim 4, characterized in that: The electric control box includes a circuit board arranged in the accommodating cavity, the circuit board includes a substrate and a first component, the first component is arranged on a side of the substrate facing the box cover and opposite to the first step portion, and the first protrusion contacts the first component for heat transfer through a first heat-conducting medium.

6. The electric control box according to claim 4, characterized in that: The circuit board further includes a second component, which is arranged on a side of the substrate facing the box cover and opposite to the second step portion, and a heat-conducting structural member is sandwiched between the second step portion and the second component.

7. The electric control box according to claim 6, characterized in that: The heat-conducting structure comprises a heat-conducting plate fixed to the substrate or the second step portion, a second heat-conducting medium is provided between the heat-conducting plate and the second device, and the second step portion contacts and transfers heat with the second device through the heat-conducting plate and the second heat-conducting medium.

8. The electric control box according to claim 2, characterized in that: The heat transfer protrusion includes a plurality of columns arranged at intervals, and the columns are cylinders, prisms, or conical columns whose cross-sections gradually decrease toward the accommodating cavity; or, the heat transfer protrusion includes a plurality of sheets arranged at intervals, and the plurality of sheets arranged in parallel form a heat sink group, and the heat transfer protrusion includes a plurality of heat sink groups, and the sheets in different heat sink groups are non-parallel arranged.

9. The electric control box according to claim 1, characterized in that: The matching portion is formed as a first matching groove, which is formed on a side surface of the box cover away from the accommodating cavity and is open in a direction away from the accommodating cavity.

10. The electric control box according to claim 9, characterized in that: The box cover is in the shape of a stepped plate and includes a first step portion and a second step portion having different distances from a substrate of the circuit board, and the first mating groove includes a first groove portion provided on the first step portion and a second groove portion provided on the second step portion.

11. The electric control box according to claim 10, characterized in that: The box cover also includes a transition portion connected between the first step portion and the second step portion, and the first matching groove includes a third groove portion provided on the transition portion, and both ends of the third groove portion are respectively connected to the first groove portion and the second groove portion, so that the first matching groove extends through the first step portion, the transition portion and the second step portion in sequence; and / or extends through the second step portion, the transition portion and the first step portion in sequence.

12. The electric control box according to claim 11, characterized in that: The first step portion and the second step portion are sequentially arranged along a first direction, and at least one of the first groove portion and the second groove portion includes both a longitudinal groove section extending along the first direction and a transverse groove section extending along a second direction orthogonal to the first direction.

13. The electric control box according to claim 10, characterized in that: The box cover includes two first side edges arranged opposite to each other along a first direction, and two second side edges arranged opposite to each other along a second direction orthogonal to the first direction. The first step portion and the second step portion are arranged in sequence along the first direction, and both ends of the first groove portion extend to the second side edges on both sides of the first step portion, and both ends of the second groove portion extend to the second side edges on both sides of the second step portion.

14. The electric control box according to claim 9, characterized in that: The electric control box comprises: A pressure cover is arranged on a side of the box cover away from the accommodating cavity and connected to the box cover. The pressure cover at least covers the first matching groove to clamp a heat dissipation pipe matched with the first matching groove together with the box cover.

15. The electric control box according to claim 14, characterized in that: A second matching groove is formed on the pressing cover. The second matching groove is formed on a side surface of the pressing cover facing the box cover and is open in a direction toward the box cover.

16. The electric control box according to claim 14, characterized in that: The pressure cover includes a plurality of sub-covers arranged at intervals; or, the pressure cover has a hollow area arranged staggered with the first matching groove.

17. The electric control box according to claim 1, characterized in that: The box body is an integrally formed part, and the box cover is an integrally formed part; and / or the box body is a sealed box body.

18. The electric control box according to claim 1, characterized in that: The box body is made of non-metal material.

19. The electric control box according to claim 1, characterized in that: A support column protrudes from a side surface of the box cover facing the accommodating cavity, and the support column is used to support and be connected to the substrate of the circuit board.

20. The electric control box according to claim 19, characterized in that: The supporting column is used to connect the substrate of the circuit board.

21. The electric control box according to claim 1, characterized in that: The electric control box includes a circuit board arranged in the accommodating cavity, the circuit board includes a substrate and devices, at least part of the devices are arranged on a side of the substrate facing the box cover; and / or the electric control box includes a heat dissipation pipe embedded in the matching part.

22. An air conditioner, characterized in that: It comprises a refrigerant circulation system and an electric control box according to any one of claims 1 to 21, wherein the refrigerant circulation system is used to provide cooling to the heat dissipation pipe embedded in the matching part.

23. The air conditioner according to claim 22, characterized in that: The electric control box is arranged in the outdoor unit of the air conditioner, at least a part of the refrigerant pipe in the outdoor unit serves as the heat dissipation pipe and is embedded in the matching part; and / or, the refrigerant circulating in the refrigerant circulation system is a flammable refrigerant.

Images