Variable-frequency electric control apparatus, outdoor unit and HVAC device

Abstract

The present application relates to a variable-frequency electric control apparatus, an outdoor unit and an HVAC device. The variable-frequency electric control apparatus comprises: a supporting plate, the supporting plate comprising a first mounting surface and a second mounting surface which are oppositely arranged, and the supporting plate being further provided with through holes passing through the first mounting surface and the second mounting surface; radiators, mounted on the first mounting surface; and electric control boards, mounted on the second mounting surface, the electric control boards being provided with electronic components, and the electronic components passing through the through holes and being in heat conduction connection with the radiators. According to the variable-frequency electric control apparatus of the present application, the radiators and the electric control boards can use the supporting plate as the same fixing reference, so as to effectively improve the precision control degree of matching between the radiators and the electric control boards, thus reducing the stress in the electric control boards, and meeting the flatness requirement for the electric control boards.

Description

Frequency conversion electronic control devices, outdoor units and HVAC equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of the following patent applications, the entire contents of which are incorporated herein by reference:

[0003] The Chinese patent application with application number 202420316986.2 and titled “Shell assembly and HVAC equipment” submitted to the State Intellectual Property Office of China on February 20, 2024; the Chinese patent application with application number 202420317001.8 and titled “Variable frequency electric control device, outdoor unit and HVAC equipment” submitted to the State Intellectual Property Office of China on February 20, 2024. Technical Field

[0004] The technical field of air conditioning heat pumps particularly relates to a variable frequency electric control device, an outdoor unit and heating and ventilation equipment. Background Art

[0005] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0006] Currently, in high-power commercial heating units, the compressor electronic control panel of the variable frequency electronic control device has high assembly flatness requirements. Since the electronic components on the electronic control panel generate a lot of heat during operation, a matching radiator is required. Due to the heavy weight of the radiator, gravity can cause the electronic control panel to bend, making it impossible to maintain its flatness. Therefore, separate supports are required for the radiator and the electronic control panel. However, due to assembly errors between the different supports, the relative positions of the radiator and the electronic control panel deviate after assembly. When connectors are used to mate the radiator with the variable frequency components on the electronic control panel, the electronic control panel inevitably bends to compensate for the assembly error, resulting in substandard flatness. Summary of the Invention

[0007] The purpose of this application is to at least solve the problem of substandard flatness of the electric control board caused by assembly errors of different support members. This purpose is achieved by:

[0008] The first aspect of the present application proposes a variable frequency electric control device, which includes: a support plate, the support plate including a first mounting surface and a second mounting surface arranged oppositely, the support plate also having a through hole passing through the first mounting surface and the second mounting surface; a radiator mounted on the first mounting surface; an electric control board mounted on the second mounting surface, the electric control board being provided with electronic components, the electronic components being passed through the through hole and thermally connected to the radiator.

[0009] According to the variable frequency electric control device of the present application, a first mounting portion and a second mounting portion are formed on a support plate of an integrated structure to respectively support the electric control board and the radiator, thereby avoiding assembly errors caused by using different support members to respectively support the radiator and the electric control board. In addition, the radiator and the electric control board can use the support plate as the same fixed reference, which can effectively improve the precision control of the fit between the radiator and the electric control board, thereby reducing the stress in the electric control board, and can effectively control the flatness of the electric control board after assembly within an allowable range.

[0010] In addition, the variable frequency electric control device according to the present application may also have the following additional technical features:

[0011] In some embodiments of the present application, the first mounting surface is provided with a first mounting portion, the second mounting surface is provided with a second mounting portion, the radiator is installed on the first mounting portion, and the electric control board is installed on the second mounting portion.

[0012] In some embodiments of the present application, the first mounting portion is configured as a first mounting hole or a first support column; and / or the second mounting portion is configured as a second support column or a second mounting hole.

[0013] In some embodiments of the present application, at least one side edge of the support plate is configured as a folded edge portion, and the folded edge portion extends in a direction away from the heat sink.

[0014] In some embodiments of the present application, the radiator is provided with a refrigerant channel; the variable frequency electric control device further comprises a refrigerant pipe, the refrigerant pipe is connected to the refrigerant channel, and the refrigerant pipe and the refrigerant channel together constitute a refrigerant circuit.

[0015] In some embodiments of the present application, the radiator includes a connected main body and a boss, the main body is connected to the support plate, the boss is located on a side of the main body away from the support plate, and the refrigerant channel is located on the boss.

[0016] According to the second aspect of the present application, an outdoor unit is also proposed, which includes the variable frequency electric control device described in the first aspect, and the outdoor unit also includes: a shell, the shell having an upper chamber and an exhaust outlet connected to the upper chamber, the upper chamber is used to accommodate a heat exchanger; an electric control box, the electric control box defines an electric control cavity and an air inlet and an air outlet respectively connected to the electric control cavity, the electric control cavity is connected to the upper chamber through the air outlet, and the electric control cavity is used to accommodate the variable frequency electric control device.

[0017] In some embodiments of the present application, the electrical control box includes an electrical control main shell, which defines the electrical control cavity and has a front opening connected to the electrical control cavity. The electrical control board in the variable frequency electrical control device is arranged toward the front opening, and the electrical control front cover is detachably connected to the electrical control main shell and covers the front opening.

[0018] In some embodiments of the present application, the electrical control box includes an electrical control main shell, which defines the electrical control cavity and has a rear opening connected to the electrical control cavity. The radiator in the variable frequency electrical control device is arranged toward the rear opening, and the electrical control back cover is detachably connected to the electrical control main shell and covers the rear opening.

[0019] In some embodiments of the present application, the electrical control box also includes an air duct shell, which is arranged on the top of the electrical control main shell, and the air duct shell defines an air flow channel. The air outlet is arranged on the air duct shell, and the electrical control cavity is connected to the upper chamber through the air flow channel. The air duct shell is provided with a drainage groove connected to the air flow channel. Along the first direction, the drainage groove is located on one side of the electrical control cavity, and the first direction is parallel to the horizontal direction or is arranged at an angle to the horizontal direction.

[0020] In some embodiments of the present application, the outdoor unit further includes a partition disposed in the shell, the partition dividing the internal space of the shell into the upper chamber and the lower chamber, the electrical control box is disposed in the lower chamber, and the air outlet is connected to the bottom of the upper chamber.

[0021] In some embodiments of the present application, the electrical control box includes an electrical control main shell and an air duct shell connected to the electrical control main shell, the electrical control main shell defines the electrical control cavity, the air duct shell defines the air flow channel, the air outlet is provided in the air duct shell, the electrical control cavity is connected to the upper chamber through the air flow channel, the air duct shell is provided with a water leakage port connected to the air flow channel, and the water leakage port is located on one side of the electrical control cavity along a first direction, and the first direction is a horizontal direction or is set at an angle to the horizontal direction.

[0022] In some embodiments of the present application, along the direction from the electrical control main housing to the air duct housing, the air flow channel includes an air inlet section, a middle section and an air outlet section that are connected in sequence, the middle section extends along the first direction, and the water leakage port is located in the air outlet section.

[0023] In some embodiments of the present application, the air outlet is arranged above the water leakage outlet.

[0024] In some embodiments of the present application, a drainage groove is further provided on the inner wall of the bottom of the air flow channel. The drainage groove is arranged opposite to the air outlet, and the water leakage port is provided on the bottom wall of the drainage groove.

[0025] In some embodiments of the present application, the electronic control cavity has a preset area, which is used to accommodate power components. The electronic control box is provided with at least one wind guide plate, which is located on one side of the air inlet. The wind guide plate is provided with a wind guide surface, which is arranged toward the preset area, and the wind guide surface is arranged at an acute angle to the air inlet direction of the air inlet.

[0026] In some embodiments of the present application, the outer side wall of the electric control box is further provided with a water baffle, and the water baffle includes a connected connection portion and a water baffle, and the water baffle is arranged opposite to and spaced apart from the air inlet in a vertical direction.

[0027] In some embodiments of the present application, the electric control box is detachably connected to the partition.

[0028] In some embodiments of the present application, the partition is provided with an opening, and the air outlet is opposite to and communicates with the opening;

[0029] The outdoor unit also includes a water shield provided in the upper chamber, the water shield is connected to the partition and covers the outside of the opening, the side wall of the water shield is provided with at least one air hole, and the air outlet is connected to the upper chamber through the air hole.

[0030] According to the third aspect of the present application, a HVAC equipment is also proposed, including the outdoor unit described in the second aspect; the HVAC equipment also includes: a fan installed at the exhaust outlet of the outdoor unit; a heat exchanger arranged in the upper chamber of the outdoor unit; and the variable frequency electric control device is arranged in the electric control chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present disclosure. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0032] FIG1 is a partial structural diagram of a variable frequency electric control device according to an embodiment of the present application;

[0033] FIG2 is a schematic structural diagram of a variable frequency electric control device according to an embodiment of the present application;

[0034] FIG3 is a schematic structural diagram of a support plate according to an embodiment of the present application;

[0035] FIG4 is a schematic structural diagram of an electric control box according to an embodiment of the present application;

[0036] FIG5 is a schematic structural diagram of an electric control box according to an embodiment of the present application;

[0037] FIG6 is a schematic structural diagram of an electric control box according to an embodiment of the present application;

[0038] FIG7 is a schematic diagram of a partial structure of an electric control box according to an embodiment of the present application;

[0039] FIG8 is a schematic cross-sectional view of the AA portion of FIG7 ;

[0040] FIG9 is a schematic diagram of a partial structure of an outdoor unit according to an embodiment of the present application.

[0041] FIG10 is a schematic structural diagram of a HVAC device according to an embodiment of the present application;

[0042] FIG11 is a partial enlarged schematic diagram of part A in FIG10 ;

[0043] FIG12 is a schematic structural diagram of an electric control box according to an embodiment of the present application;

[0044] FIG13 is a schematic structural diagram of an electric control box according to an embodiment of the present application;

[0045] FIG14 is a schematic structural diagram of an electric control box according to an embodiment of the present application;

[0046] FIG15 is a schematic cross-sectional view of the electric control box according to an embodiment of the present application. DETAILED DESCRIPTION

[0047] The following describes exemplary embodiments of the present application in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Instead, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0048] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0049] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0050] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is rotated, an element described as "below" or "beneath" another element or feature would subsequently be oriented "above" or "above" the other element or feature. Thus, the example term "below" can encompass both above and below orientations.

[0051] According to an embodiment of the present application, a variable frequency electric control device 100 is proposed in combination with FIG. 1 , FIG. 2 and FIG. 4 . The variable frequency electric control device 100 includes a support plate 10 , a heat sink 120 and an electric control board 30 .

[0052] The support plate 10 is a plate-shaped member comprising a main body 11, a first mounting portion 13, and a second mounting portion 14. Both the first mounting portion 13 and the second mounting portion 14 are disposed on the main body 11. The first mounting portion 13 and the second mounting portion 14 can be disposed on opposite sides of the main body 11. The support plate 10 includes a first mounting surface 101 and a second mounting surface 102, with the first mounting portion 13 having a first mounting surface and the second mounting portion 14 having a second mounting surface. The first mounting portion 13 is used to mount the electronic control board 30, while the second mounting portion 14 is used to mount and support the radiator 120. In this embodiment, the second mounting portion 14 comprises a plurality of support columns disposed on the main body 11. The support columns are hollow columnar structures with internal threads formed on their inner diameters. The second mounting portion 14 is integrally formed with the main body 11. The electronic control board 30 is parallel to the support plate 10 and is mounted to the support columns via connectors. The radiator 120 is mounted on the end of the second mounting portion 14 facing away from the main body 11. The electronic component 31 is located between the electronic control board 30 and the heat sink 120. The electronic component 31 is mounted on the electronic control board 30 and electrically connected to the wiring in the electronic control board 30. The end of the electronic component 31 facing away from the electronic control board 30 is thermally conductively connected to the heat sink 120, thereby utilizing the heat sink 120 to dissipate heat from the electronic component 31. A thermal conductive connection refers to a connection method in which heat in the electronic component 31 can be transferred to the heat sink 120 and dissipated through the heat sink 120. In this thermal conductive connection, the electronic component 31 and the heat sink 120 can be directly abutted or indirectly connected via a thermally conductive medium. For example, in some embodiments, the electronic component 31 and the heat sink 120 are directly abutted to achieve a thermal conductive connection between the electronic component 31 and the heat sink 120. In other embodiments, a gap is provided between the electronic component 31 and the heat sink 120, and a thermally conductive medium (such as silicone grease) is filled in the gap to achieve a thermal conductive connection between the electronic component 31 and the heat sink 120.

[0053] In this embodiment, the electronic component 31 refers to a variable frequency electronic component for driving a compressor and a fan, and the variable frequency electronic component generates a lot of heat during operation and has a heat dissipation requirement.

[0054] In this embodiment, the first mounting portion 13 and the second mounting portion 14 are formed on the integral support plate 10 to respectively support the electronic control board 30 and the radiator 120, thereby avoiding assembly errors caused by using different support members to respectively support the radiator 120 and the electronic control board 30. In addition, the radiator 120 and the electronic control board 30 can use the support plate 10 as the same fixed reference, which can effectively improve the precision control of the fit between the radiator 120 and the electronic control board 30, thereby reducing the stress in the electronic control board 30, and effectively controlling the flatness of the electronic control board 30 after assembly within an allowable range.

[0055] In some embodiments, as shown in Figures 2, 3, and 4, the first mounting surface 101 and the second mounting surface 102 are the two side surfaces of the support plate 10. The first mounting surface 101 and the second mounting surface 102 are parallel to each other. The support plate 10 is provided with a through hole 103, which extends perpendicularly through the first mounting surface 101 and the second mounting surface 102 of the support plate 10. Specifically, the first mounting portion 13 is provided on the first mounting surface 101, and the second mounting portion 14 is provided on the second mounting surface 102. The heat sink 120 and the electronic control board 30 are respectively located on either side of the support plate 10. The electronic component 31 is thermally connected to the heat sink 120 via the through hole 103. Specifically, the end of the electronic component 31 facing away from the electronic control board 30 forms a heat conducting surface 311, which is disposed toward and abuts against the heat sink 120, allowing the electronic component 31 to transfer heat to the heat sink 120 through the heat conducting surface 311 to achieve heat dissipation. In this embodiment, the heat conducting surface 311 is flush with the first mounting surface 101 to ensure that the heat conducting surface 311 can accurately abut against the heat sink 120 .

[0056] In this embodiment, the electronic component 31 is partially inserted into the through hole 103, so that the heat sink 120, the electronic component 31 and the electronic control board 30 are prevented from overlapping with the support plate 10 in the direction perpendicular to the first mounting surface 101, thereby reducing the dimensions of the heat sink 120, the electronic component 31, the electronic control board 30 and the support plate 10 in the direction perpendicular to the first mounting surface 101.

[0057] In this embodiment, as shown in Figures 2 and 4, the first mounting portion 13 is a mounting hole, which is configured as a threaded hole. The heat sink 120 is removably mounted on the support plate 10 via bolts and other connectors. The through hole 103 is configured as a rectangular hole-like structure, and the heat sink 120 is configured as a rectangular metal plate-like member. Four mounting holes are provided around the through hole 103. The heat sink 120 is provided with four through holes 103 corresponding to the mounting holes. Four bolts pass through the through holes 103 on the heat sink 120 and extend into the mounting holes, thereby fixing the heat sink 120 to the support plate 10. The heat sink 120 covers the through holes 103. In this embodiment, the side of the heat sink 120 facing the support plate 10 abuts against the first mounting surface 101, thereby improving the stability of the connection between the heat sink 120 and the support plate 10.

[0058] In some embodiments, as shown in Figure 3, at least one side edge of the support plate 10 is configured as a hem to enhance the overall structural strength of the support plate 10. In this embodiment, the support plate 10 includes a plate-shaped main body 11 and a plurality of hem portions 12. The first mounting portion 13, the second mounting portion 14, and the through hole 103 are all provided in the main body 11. The hem portions 12 are connected to the edge of the main body 11 and are perpendicular to the main body 11.

[0059] In some embodiments, as shown in Figures 4 and 8, the variable frequency electric control device 100 further includes a refrigerant pipe 140, and the radiator 120 is provided with a refrigerant channel 1201. The refrigerant pipe 140 is connected to the refrigerant channel 1201 and together constitutes a refrigerant circuit, using the refrigerant to cool the radiator 120, thereby improving the heat dissipation efficiency of the radiator 120. In some embodiments, the refrigerant channel 1201 has an inlet and an outlet, and the refrigerant pipe 140 includes a liquid inlet pipe and a liquid return pipe. The liquid inlet pipe is connected to the inlet, and the liquid return pipe is connected to the outlet, thereby forming a refrigerant circuit. In other embodiments, the refrigerant pipe 140 is provided in the refrigerant channel 1201, and the refrigerant pipe 140 is thermally connected to the inner wall of the refrigerant channel 1201.

[0060] In some embodiments, as shown in FIG4 , the heat sink 120 includes a main body 121 and a boss 122. The main body 121 is connected to the boss 122. The main body 121 is a rectangular plate-shaped structure. The boss 122 is provided on a side of the main body 121 facing away from the support plate 10. The refrigerant channel 1201 is provided on the boss 122. By providing the boss 122 on one side of the main body 121, the overall thickness of the region of the heat sink 120 having the boss 122 is larger in a direction perpendicular to the first mounting surface 101, while the thickness of other portions is smaller. On the one hand, the heat sink 120 has sufficient thickness space for providing the refrigerant channel 1201. On the other hand, the overall material used for the heat sink 120 can be saved, thereby reducing the manufacturing cost of the heat sink 120.

[0061] In the present application, the heat sink 120 is a metal member that is easy to conduct heat, and its metal material includes but is not limited to aluminum, iron, copper, silver and other metals and their alloys.

[0062] In this embodiment, the electronic control board is a PCB board, that is, a printed circuit board.

[0063] According to an embodiment of the present application, as shown in FIG. 9 , an outdoor unit 200 is further proposed. The outdoor unit 200 includes a variable frequency electric control device 100 , a housing 210 and an electric control box 220 .

[0064] Specifically, the housing 210 has an upper chamber 21 and an exhaust port 2102. Exhaust port 2102 communicates with the upper chamber 21 and is used to install a fan 2103. The upper chamber 21 is used to install a heat exchanger. The electrical control box 220 has an electrical control cavity 2201, which is used to accommodate the variable frequency electronic control device 100. The variable frequency electronic control device 100 includes an electrical control board 30 and electronic components 31. The variable frequency electronic control device 100 may also include a filter board, a PTC (Positive Temperature Coefficient) heating tube, a temperature sensor, a module board, a reactor, etc.

[0065] 7 , 8 and 9 , the electric control box 220 is further provided with an air inlet 2202 and an air outlet 2203 connected to the electric control chamber 2201. The air outlet 2203 is connected to the upper chamber 21, so that when the upper chamber 21 is in a negative pressure state, under the action of the suction force of the upper chamber 21, external air can flow into the electric control chamber 2201 through the air inlet 2202, and flow into the upper chamber 21 through the electric control chamber 2201 and the air outlet 2203, thereby cooling the variable frequency electric control device 100 in the electric controller and improving its heat dissipation efficiency.

[0066] According to the outdoor unit 200 proposed in the present application, an air inlet 2202 and an air outlet 2203 are provided on the electric control box 220, and the electric control chamber 2201 is connected to the upper chamber 21 through the air outlet 2203. When a negative pressure is generated in the upper chamber 21 under the driving action of the fan 2103, the external air flow can enter the electric control chamber 2201 through the air inlet 2202, and flow into the upper chamber 21 through the electric control chamber 2201 and the air outlet 2203. Therefore, the air flow velocity in the electric control chamber 2201 can be effectively increased, the heat dissipation efficiency of the electric control chamber 2201 is improved, and the heat dissipation of the variable frequency electric control device 100 is accelerated.

[0067] In some embodiments, please refer to Figures 6, 7 and 8, the electric control box 220 includes an electric control main shell 221 and an electric control front cover 222. The electric control main shell 221 defines an electric control cavity 2201 and has a front opening 2204 connected to the electric control cavity 2201. The electric control board 30 in the variable frequency electric control device 100 is arranged toward the front opening 2204. The electric control front cover 222 is detachably connected to the electric control main shell 221 and covers the front opening 2204, so that maintenance personnel can inspect the electric control board 30 and the electronic components 31 thereon by opening the electric control front cover 222, thereby reducing the difficulty of maintenance.

[0068] In some embodiments, please refer to Figures 4 and 5, the electric control main shell 221 includes a base plate 225, the electric control board 30 is installed on one side of the base plate 225 facing the electric control cavity 2201, and a rear opening 2205 is provided on the base plate 225. The electric control box 220 also includes an electric control back cover 223, and the rear opening 2205 is connected to the electric control cavity 2201. The radiator 120 in the variable frequency electric control device 100 is arranged toward the rear opening 2205. The electric control back cover 223 is detachably connected to the electric control main shell 221 and covers the rear opening 2205, so that maintenance personnel can inspect the radiator 120 by opening the electric control front cover 222, thereby reducing the difficulty of maintenance.

[0069] In some embodiments, as shown in conjunction with Figures 4, 7, 8, and 9, the electric control box 220 further includes an air duct housing 224. The electric control main housing 221 is a rectangular parallelepiped shell structure. The air duct housing 224 is disposed on the top of the electric control main housing 221 and is located between the partition and the electric control main housing 221. The electric control main housing 221 is hollow to define an electric control chamber 2201. The air duct housing 224 defines an air flow channel 2206. An air outlet 2203 is disposed on the top of the air duct housing 224 and communicates with the air flow channel 2206. The electric control chamber 2201 communicates with the upper chamber 21 through the air flow channel 2206. The airflow in the electric control chamber 2201 first enters the air flow channel 2206 and flows through the air flow channel 2206 before entering the upper chamber 21 through the air outlet 2203. The air duct housing 224 is provided with a drainage groove 2241, and a water leakage port 22411 is provided at the bottom of the drainage groove 2241. The drainage groove 2241 is connected to the air flow channel 2206. When condensed water in the upper chamber 21 drips from the air outlet 2203 into the air flow channel 2206, the condensed water can flow out of the air flow channel 2206 through the drainage groove 2241. Specifically, along the first direction, the drainage groove 2241 is located on one side of the electric control chamber 2201, thereby preventing condensed water flowing out of the drainage groove 2241 from dripping into the electric control chamber 2201. While utilizing the negative pressure of the upper chamber 21 to improve the heat dissipation performance of the electric control box 220, the waterproof function of the electric control box 220 is also taken into account, and the condensed water in the upper chamber 21 is prevented from flowing into the electric control chamber 2201 through the air outlet 2203. In this embodiment, the first direction is parallel to the horizontal direction, so that the drainage groove 2241 and the electric control cavity 2201 are spaced apart in the horizontal direction. Under the action of gravity, condensed water can drip downward through the drainage groove 2241 to the outside of the electric control cavity 2201. It is understood that in other embodiments, the first direction is angled with the horizontal direction, that is, the drainage groove 2241 can be located obliquely above or obliquely below the electric control cavity 2201, and the projection of the drainage groove 2241 on the horizontal plane is located outside the projection of the electric control cavity 2201 on the horizontal plane.

[0070] According to an embodiment of the present application, as shown in Figures 10, 12, and 15, the outdoor unit 200 includes a housing 20 and an electrical control box 40. The housing 20 has an upper chamber 21 and an exhaust port 2101. The exhaust port 2101 is connected to the upper chamber 21 and is used to install the fan 201. The upper chamber 21 is used to install the heat exchanger 202. The electrical control box 40 has an electrical control cavity 411, which is used to accommodate the electrical control device 203. The electrical control device 203 specifically refers to the various electrical control components in the variable frequency unit in the HVAC equipment. The electrical control device 203 includes an electrical control main board, a filter board, a PTC (Positive Temperature Coefficient, abbreviated as PTC) heating tube, a temperature sensor, a module board, an inductor, etc. The electronic control box 40 is also provided with an air inlet 412 and an air outlet 424 connected to the electronic control chamber 411. The air outlet 424 is connected to the upper chamber 21, so that when the upper chamber 21 is in a negative pressure state, under the action of the suction force of the upper chamber 21, the external air can flow into the electronic control chamber 411 through the air inlet 412, and flow into the upper chamber 21 through the electronic control chamber 411 and the air outlet 424.

[0071] According to the outdoor unit 200 proposed in the present application, an air inlet 412 and an air outlet 424 are provided on the electric control box 40, and the electric control chamber 411 is connected to the upper chamber 21 through the air outlet 424. When a negative pressure is generated in the upper chamber 21 based on the driving action of the fan 201, the external air flow can enter the electric control chamber 411 through the air inlet 412, and flow into the upper chamber 21 through the electric control chamber 411 and the air outlet 424. Therefore, the air flow velocity in the electric control chamber 411 can be effectively increased, and the heat dissipation efficiency of the electric control chamber 411 can be improved.

[0072] It should also be noted that this embodiment utilizes the negative pressure of the upper chamber 21 to form an air duct for heat dissipation, eliminating the need for an additional fan 201 for heat dissipation in the electrical control box 40. This simplifies the structure and reduces costs. Furthermore, when the HVAC equipment is providing heat, the heat exchanger 202 located in the upper chamber 21 functions as an evaporator. After the external airflow passes through the electrical control chamber 411 to dissipate heat from the electrical control device 203 within the electrical control chamber 411, the heat dissipated by the electrical control device 203 can be transferred into the upper chamber 21, thereby increasing the heat absorption capacity of the heat exchanger 202 in the upper chamber 21 and fully utilizing the heat energy generated by the electrical control device 203.

[0073] In some embodiments, as shown in Figures 10 and 12, the outdoor unit 200 further includes a partition 130 disposed within the housing 20. The partition 130 is horizontally arranged and divides the interior space of the housing 20 into an upper chamber 21 and a lower chamber 22. The lower chamber 22 is used to accommodate the compressor, shell and tube, and piping system. An electrical control box 40 is vertically mounted within the lower chamber 22. An air inlet 412 is disposed at the bottom of the electrical control box 40, and an air outlet 424 is disposed at the top of the electrical control box 40. The air outlet 424 on the electrical control box 40 communicates with the bottom of the upper chamber 21. In this embodiment, air enters the electrical control box 40 from the bottom. As air passes through the electrical control chamber 411, it fully exchanges heat with the electrical control components 203 disposed therein, and then exits from the top of the electrical control chamber 411. This increases the airflow within the electrical control chamber 411 and improves the heat dissipation capacity of the electrical control chamber 411.

[0074] In some embodiments, as shown in Figures 13, 14, and 15, the electric control box 40 includes an electric control main housing 41 and an air duct housing 42. The electric control main housing 41 is a rectangular shell structure. The air duct housing 42 is disposed on the top of the electric control main housing 41 and is located between the partition 130 and the electric control main housing 41. The electric control main housing 41 is hollow to define an electric control cavity 411. The air duct housing 42 defines an air flow channel 421. An air outlet 424 is disposed on the top of the air duct housing 42 and communicates with the air flow channel 421. The electric control cavity 411 communicates with the upper chamber 21 through the air flow channel 421. Airflow in the electric control cavity 411 first enters the air flow channel 421 and flows through the air flow channel 421 before entering the upper chamber 21 through the air outlet 424. The air duct housing 42 is provided with a water leak 422, which communicates with the air flow channel 421. When condensed water in the upper chamber 21 drips from the air outlet 424 into the air flow channel 421, the condensed water can flow out of the air flow channel 421 through the water leak 422. Specifically, along a first direction, the water leak 422 is located on one side of the electrical control chamber 411. This prevents condensed water from the water leak 422 from dripping into the electrical control chamber 411. While utilizing the negative pressure of the upper chamber 21 to improve the heat dissipation performance of the electrical control box 40, it also maintains the waterproof function of the electrical control box 40 and prevents condensed water in the upper chamber 21 from flowing into the electrical control chamber 411 through the air outlet 424. In this embodiment, the first direction is parallel to the horizontal direction, so that the water leak 422 and the electrical control chamber 411 are spaced apart in the horizontal direction. Under the action of gravity, condensed water can drip downward through the water leak 422 and out of the electrical control chamber 411. Understandably, in other embodiments, the first direction forms an angle with the horizontal direction, that is, the water leakage port 422 may be located obliquely above the electric control cavity 411 , and the projection of the water leakage port 422 on the horizontal plane is located outside the projection of the electric control cavity 411 on the horizontal plane.

[0075] In some embodiments, please refer to Figures 12, 13 and 15. Along the direction from the electric control main shell to the air duct shell, the air flow channel 421 includes an air inlet section 4211, an intermediate section 4212 and an air outlet section 4213 connected in sequence. The intermediate section 4212 extends along a first direction, and the first direction is parallel to the horizontal direction, so that the air flow in the intermediate section 4212 flows along the horizontal direction, and the water leakage port 422 is located in the air outlet section 4213. Water dripping into the air flow channel 421 through the air outlet 424 (such as water dripping or splashing on the intermediate section 4212) can flow to one side of the air outlet section 4213 under the blowing of the air flow, so that the water in the air flow channel 421 can be gathered to the water leakage port 422 under the push of the air flow, thereby further reducing the probability of condensed water flowing into the electric control cavity 411 through the air flow channel 421.

[0076] In some embodiments, as shown in conjunction with Figures 10, 13, and 15, the air outlet 424 and the water leakage port 422 are arranged opposite each other along the second direction, and the second direction is parallel to the vertical direction. Condensate dripping from the air outlet 424 into the air flow channel 421 can flow directly through the water leakage port 422 under the action of gravity, thereby improving the drainage efficiency of the air flow channel 421 and reducing the amount of condensate accumulated in the air flow channel 421. In this embodiment, the water leakage port 422 is located directly below the air outlet 424, that is, the projections of the water leakage port 422 and the air outlet 424 on the horizontal plane at least partially overlap.

[0077] In some embodiments, the second direction forms an angle with the vertical direction, that is, the water leakage port 422 is located obliquely below the air outlet 424 . At this time, condensed water flowing into the air flow channel 421 from the air outlet 424 can still be discharged through the water leakage port 422 .

[0078] In some embodiments, as shown in conjunction with Figures 14 and 15 , a drainage groove 423 is provided within the bottom of the airflow channel 421. Along the second direction, the drainage groove 423 is arranged opposite the air outlet 424, so that the projections of the drainage groove 423 and the air outlet 424 on a horizontal plane at least partially overlap. Condensate dripping from the air outlet 424 into the airflow channel 421 can, under the action of gravity, directly drip and gather at the bottom of the drainage groove 423, and be discharged through a water leakage port 422 provided on the bottom wall of the drainage groove 423. By providing the drainage groove 423, the condensate flowing from the air outlet 424 into the airflow channel 421 can be collected in the drainage groove 423, thereby reducing the probability of overflow into the electronic control chamber 411 due to excessive water accumulation in the airflow channel 421. In this embodiment, the inner wall of the drainage groove 423 close to the air inlet section 4211 is inclined relative to the first direction, increasing the exposure of the drainage groove 423 toward the air outlet 424, and increasing the probability of condensation water dripping directly into the drainage groove 423, so as to more efficiently discharge the condensation water through the leakage port 422.

[0079] In some embodiments, as shown in FIG13 , at least one air guide plate 50 is further provided in the electric control cavity 411. The electric control cavity 411 has a preset area 4111. The preset area 4111 is used to place power elements, wherein power elements refer to electronic components that generate relatively large amounts of heat, such as capacitors, PTC heating tubes, etc. The air guide plate 50 is provided on one side of the air inlet 412 and is tilted toward the preset area 4111. The air guide plate 50 is provided with an air guide surface (not shown in the figure). The air guide surface is provided toward the preset area and is provided at an acute angle to the opening direction of the air inlet, so that the airflow flowing into the electric control cavity 411 from the air inlet 412 is guided to the preset area 4111 under the action of the air guide surface, thereby increasing the heat dissipation capacity of the preset area 4111, thereby enhancing the heat dissipation effect of the power elements provided in the preset area 4111.

[0080] In some embodiments, as shown in Figures 13 and 14, the outdoor unit 200 further includes a water baffle 60. The water baffle 60 is an L-shaped plate-like member. The water baffle 60 includes a connecting portion 61 and a water baffle 62. The connecting portion 61 is connected to the outer wall of the electric control box 40 and extends in the vertical direction. The water baffle 62 is arranged at a 90-degree angle with the connecting portion 61 and is located at the end of the connecting portion 61 away from the electric control chamber 411. The water baffle 62 is arranged opposite to the air inlet 412 in the vertical direction and is located below and spaced from the air inlet 412 in the vertical direction. The function of the water baffle 60 is to prevent water dripping from the top of the electric control box 40 onto the installation surface from splashing into the air inlet 412, thereby achieving a waterproof effect on the lower portion of the electric control box 40.

[0081] The installation surface refers to the surface where the outdoor unit 200 is installed, such as the ground, roof surface, etc. Water dripping from the top of the electric control box 40 includes condensed water dripping from the water leak 422 and condensed water and rainwater on the outdoor unit 200 in the natural environment.

[0082] In some embodiments, the electric control box 40 is detachably connected to the partition 130 , and the air outlet 424 can be removed from top to bottom through the electric control box 40 being detachably connected to the partition 130 , which facilitates installation. Among them, the electric control box 40 and the partition 130 have multiple connection methods. For example, in some embodiments, a mounting portion is provided on the partition 130, and a corresponding fixing hole is provided on the electric control box 40, and the electric control box 40 and the partition 130 are fastened with the mounting portion by fasteners passing through the fixing holes to achieve a detachable connection between the electric control box 40 and the partition 130; in other embodiments, a mounting portion is provided on the electric control box 40, and a corresponding fixing hole is provided on the partition 130, and the electric control box 40 and the partition 130 are fastened with the mounting portion by fasteners passing through the fixing holes to achieve a detachable connection between the electric control box 40 and the partition 130; in other embodiments, a buckle is provided on one of the partition 130 and the electric control box 40, and a slot is provided on the other of the two, and the detachable connection between the electric control box 40 and the partition 130 is achieved by the snap connection between the buckle and the slot.

[0083] In some embodiments, as shown in Figures 10, 11, and 12, the partition 130 is further provided with an opening (not shown) at a position opposite the air outlet 424. The profile of the opening matches the profile of the air outlet 424, and the opening is vertically opposite and communicates with the air outlet 424. The airflow in the electronic control chamber 411 flows into the upper chamber 21 through the air outlet 424 and the opening in sequence. In this embodiment, the outdoor unit 200 further includes a water shield 70, which is connected to the partition 130. The water shield 70 has a shell-like structure and includes a top plate 71 and side plates 72 arranged around the circumferential edge of the top plate. The side plates 72 are generally annular in structure and are arranged outside the opening. Condensate dripping from the evaporator onto the partition 130 is blocked outside the opening by the side plates 72. The top plate 71 is used to directly block water dripping from the evaporator, thereby further reducing the probability of condensate in the upper chamber 21 falling into the electric control chamber 411 through the air inlet 412. The side wall of the water shield 70 is provided with at least one air hole 721, so that the air outlet 424 can communicate with the upper chamber 21 through the opening and the air hole 721 in sequence. The sidewall of the water shield 70 is the side panel 72 of the water shield 70. Air holes 721 are provided on the sidewall of the water shield 70 to reduce the probability of condensed water entering the air outlet 424 through the air holes 721, thereby providing the water shield 70 with a waterproof effect. In this embodiment, the sidewall of the water shield 70 is provided with a plurality of air holes 721, which are sequentially spaced along the circumference of the water shield 70.

[0084] According to an embodiment of the present application, as shown in Figure 10, a HVAC equipment is also proposed, which includes an outdoor unit 200, a fan 201, a heat exchanger 202 and an electronic control device 203, wherein the fan 201 is installed at the exhaust port 2101 in the outdoor unit 200, the heat exchanger 202 is arranged in the upper chamber 21 in the outdoor unit 200; the electronic control device 203 is arranged in the electronic control chamber 411 in the outdoor unit 200.

[0085] According to the HVAC equipment proposed in this application, an air inlet 412 and an air outlet 424 are provided on the electric control box 40, and the electric control chamber 411 is connected to the upper chamber 21 through the air outlet 424, and the fan 201 is used to drive the air in the upper chamber 21 to flow to the outside of the upper chamber 21, so that a negative pressure is generated in the upper chamber 21. Under the suction action of the negative pressure of the upper chamber 21, the external air flow enters the electric control chamber 411 through the air inlet 412, and fully exchanges heat with the electric control device 203 in the electric control chamber 411 in the process of flowing through the electric control chamber 411, and flows into the upper chamber 21 through the electric control chamber 411 and the air outlet 424, thereby effectively improving the heat dissipation efficiency of the electric control device 203.

[0086] Moreover, when the HVAC equipment is in the process of providing heat, the heat exchanger 202 arranged in the upper chamber 21 acts as an evaporator. After the external airflow flows through the electric control chamber 411 to dissipate heat for the electric control device 203 in the electric control chamber 411, the heat dissipated by the electric control device 203 can be replaced into the upper chamber 21, thereby improving the heat absorption capacity of the heat exchanger 202 in the upper chamber 21 and making full use of the heat energy generated by the electric control device 203.

[0087] The above are merely preferred embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A variable frequency electric control device, wherein: The variable frequency electric control device comprises: A support plate, the support plate comprising a first mounting surface and a second mounting surface disposed opposite to each other, the support plate further comprising a through hole extending through the first mounting surface and the second mounting surface; a radiator, mounted on the first mounting surface; An electric control board is mounted on the second mounting surface. The electric control board is provided with electronic components. The electronic components are passed through the through holes and are thermally connected to the radiator.

2. The variable frequency electric control device according to claim 1, wherein: The first mounting surface is provided with a first mounting portion, the second mounting surface is provided with a second mounting portion, the radiator is mounted on the first mounting portion, and the electric control board is mounted on the second mounting portion.

3. The variable frequency electric control device according to claim 2, wherein: The first mounting portion is configured as a first mounting hole or a first support column; And / or, the second mounting portion is configured as a second support column or a second mounting hole.

4. The variable frequency electric control device according to claim 1, wherein: At least one side edge of the support plate is configured as a folded edge portion, and the folded edge portion extends in a direction away from the radiator.

5. The variable frequency electric control device according to claim 1, wherein: The radiator is provided with a refrigerant channel; the variable frequency electric control device further comprises a refrigerant pipe, the refrigerant pipe is communicated with the refrigerant channel, and the refrigerant pipe and the refrigerant channel together constitute a refrigerant circuit.

6. The variable frequency electric control device according to claim 5, wherein: The radiator includes a main body and a boss portion connected to each other. The main body is connected to the support plate. The boss portion is arranged on a side of the main body away from the support plate. The refrigerant channel is arranged on the boss portion.

7. An outdoor unit, wherein: The outdoor unit includes the variable frequency electric control device according to any one of claims 1 to 6, and further includes: a housing having an upper chamber and an exhaust port communicating with the upper chamber, wherein the upper chamber is used to accommodate the heat exchanger; An electric control box defines an electric control cavity and an air inlet and an air outlet respectively connected to the electric control cavity. The electric control cavity is connected to the upper chamber through the air outlet. The electric control cavity is used to accommodate the variable frequency electric control device.

8. The outdoor unit according to claim 7, wherein: The electric control box includes an electric control main shell and an electric control front cover. The electric control main shell defines the electric control cavity and has a front opening connected to the electric control cavity. The electric control board in the variable frequency electric control device is arranged toward the front opening. The electric control front cover is detachably connected to the electric control main shell and covers the front opening.

9. The outdoor unit according to claim 7, wherein: The electronic control box includes an electronic control main shell and an electronic control back cover. The electronic control main shell defines the electronic control cavity and has a rear opening connected to the electronic control cavity. The radiator in the variable frequency electronic control device is arranged toward the rear opening. The electronic control back cover is detachably connected to the electronic control main shell and covers the rear opening.

10. The outdoor unit according to claim 8 or 9, wherein: The electronic control box also includes an air duct shell, which is arranged on the top of the electronic control main shell. The air duct shell defines an air flow channel. The air outlet is arranged on the air duct shell. The electronic control cavity is connected with the upper chamber through the air flow channel. The air duct shell is provided with a drainage groove connected with the air flow channel. Along the first direction, the drainage groove is located on one side of the electronic control cavity. The first direction is parallel to the horizontal direction or is arranged at an angle to the horizontal direction.

11. The outdoor unit according to claim 7, wherein The outdoor unit further includes a partition disposed in the shell, the partition dividing the internal space of the shell into the upper chamber and the lower chamber, the electric control box is disposed in the lower chamber, and the air outlet is communicated with the bottom of the upper chamber.

12. The outdoor unit according to claim 11, wherein The electronic control box includes an electronic control main shell and an air duct shell connected to the electronic control main shell, the electronic control main shell defines the electronic control cavity, the air duct shell defines the air flow channel, the air outlet is provided on the air duct shell, the electronic control cavity is connected to the upper chamber through the air flow channel, the air duct shell is provided with a water leakage port connected to the air flow channel, along a first direction, the water leakage port is located on one side of the electronic control cavity, and the first direction is a horizontal direction or is arranged at an angle to the horizontal direction.

13. The outdoor unit according to claim 12, wherein: Along the direction from the electric control main housing to the air duct housing, the air flow channel includes an air inlet section, a middle section and an air outlet section that are connected in sequence. The middle section extends along the first direction, and the water leakage port is located in the air outlet section.

14. The outdoor unit according to claim 12, wherein The air outlet is arranged above the water leakage outlet.

15. The outdoor unit according to claim 14, wherein The inner wall of the bottom of the air flow channel is further provided with a drainage groove, the drainage groove is arranged opposite to the air outlet, and the water leakage port is arranged on the bottom wall of the drainage groove.

16. The outdoor unit according to claim 7, wherein The electronic control cavity has a preset area, which is used to accommodate power components. The electronic control box is provided with at least one wind guide plate, which is located on one side of the air inlet. The wind guide plate is provided with a wind guide surface, which is arranged toward the preset area, and the wind guide surface is arranged at an acute angle to the air inlet direction of the air inlet.

17. The outdoor unit according to any one of claims 11 to 16, wherein: The outer side wall of the electric control box is further provided with a water baffle, which includes a connecting portion and a water baffle that are connected to each other. The water baffle is arranged opposite to and spaced from the air inlet in a vertical direction.

18. The outdoor unit according to any one of claims 11 to 16, wherein: The electric control box is detachably connected to the partition.

19. The outdoor unit according to claim 18, wherein The partition is provided with an opening, and the air outlet is opposite to and communicates with the opening; The outdoor unit also includes a water shield provided in the upper chamber, the water shield is connected to the partition and covers the outside of the opening, the side wall of the water shield is provided with at least one air hole, and the air outlet is connected to the upper chamber through the air hole.

20. A heating and ventilation equipment, wherein: The outdoor unit according to any one of claims 7 to 19; the HVAC equipment further comprises: a fan installed at an air outlet of the outdoor unit; a heat exchanger disposed in the upper chamber of the outdoor unit; The variable frequency electric control device is arranged in the electric control cavity.

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