Heating and ventilation system and electric control box thereof

Abstract

The embodiment of the utility model provides a heating and ventilation system and an electric control box thereof, the electric control box comprises a box body, an isolation cover and a wire holder, an inner cavity is formed in the box body, at least part of the isolation cover is located in the inner cavity, and a mounting cavity formed by the isolation cover is isolated from an interval outside the isolation cover and located in the inner cavity, so that external dust and other impurities are difficult to enter the interval outside the isolation cover and located in the inner cavity; therefore, the possibility of short circuit caused by accumulation of dust and other impurities is reduced, and the normal operation environment of internal electrical components is improved.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, and particularly to a heating, ventilation and air conditioning (HVAC) system and its electric control box. Background Art

[0002] The electrical components in the electric control box need to be wired to the outside, so holes need to be drilled in the side wall of the electric control box, which will cause some dust to enter the inside of the electric control box through the holes, thus possibly affecting the normal operation of the internal electrical components. Summary of the Utility Model

[0003] This application provides an HVAC system and its junction box. By isolating the installation cavity formed by the partition cover from the area outside the partition cover and inside the cavity, it can make it difficult for dust and other impurities to enter the area outside the partition cover and inside the cavity, thereby improving the normal operating environment of the internal electrical components.

[0004] In a first aspect, an embodiment of this application provides an electric control box for an HVAC system, including:

[0005] A box body, which forms an inner cavity and an installation opening communicating with the inner cavity;

[0006] A partition cover, which is arranged in the inner cavity and covers the installation opening. The partition cover forms an installation cavity, and the installation cavity is isolated from the area outside the partition cover and inside the cavity; and

[0007] A wiring base, at least part of which is located in the installation cavity.

[0008] In some embodiments, the wiring base is provided with a first wiring portion and a second wiring portion, and the second wiring portion is electrically connected to the first wiring portion.

[0009] The second wiring portion and the first wiring portion are separated by the partition cover; or, both the second wiring portion and the first wiring portion are located in the installation cavity, and the partition cover is provided with a wire passing hole, and a sealing member is arranged in the wire passing hole.

[0010] In some embodiments, the partition cover includes:

[0011] A base, the wiring base is fixed relative to the base, and the base forms a wire passing opening; and

[0012] A cover plate, which is movably connected to the base. The cover plate has a first position and a second position. In the first position, the cover plate is connected to the base and encloses to form the installation cavity, and the installation cavity communicates with the wire passing opening; in the second position, at least part of the wiring base is exposed.

[0013] In some embodiments, the partition cover further includes:

[0014] The baffle is fixed relative to the base. When the cover plate is in the first position, the baffle and the cover plate are on the same side of the base, and the baffle is on the side where the wire passing opening is located. A wire passing cavity communicating with the installation cavity is formed between the baffle and the base, and the wire passing cavity forms an opening on the side away from the wire passing opening.

[0015] In some embodiments, the partition cover further includes:

[0016] The overlapping plate is fixed relative to the cover plate. When the cover plate is in the first position, the overlapping plate is laid on the baffle. When the cover plate is in the second position, the overlapping plate is separated from the baffle.

[0017] In some embodiments, a overlapping groove is formed on the side of the baffle facing away from the wire passing cavity. When the cover plate is in the first position, at least part of the overlapping plate is located in the overlapping groove and fits against the inner wall of the overlapping groove.

[0018] In some embodiments, the overlapping groove extends to the end face of the baffle away from the opening;

[0019] And / or, when the cover plate is in the first position, the cover plate fits against the end face of the baffle away from the opening.

[0020] In some embodiments, the cover plate is rotatably connected to the base on one side of the base and detachably connected to the base on the other side of the base.

[0021] In some embodiments, it further includes:

[0022] The partition board is arranged in the inner cavity of the box body and divides the inner cavity into a first chamber and a second chamber. The partition board is provided with a first ventilation opening and a second ventilation opening arranged at intervals, and both the first ventilation opening and the second ventilation opening communicate with the first chamber and the second chamber;

[0023] The electronic device is arranged in the first chamber;

[0024] The radiator is at least partially arranged in the second chamber;

[0025] The cooling fan is arranged in one of the first chamber and the second chamber for circulating the air flow between the first chamber and the second chamber;

[0026] Wherein, the installation opening communicates with the first chamber, and the partition cover is located in the first chamber.

[0027] In some embodiments, the partition cover is located on the side of the first chamber.

[0028] In some embodiments, both the cooling fan and the electronic device are located in the first chamber;

[0029] The cooling fan includes a first cooling fan and a second cooling fan. The first cooling fan is arranged on one side of the first chamber along a first direction, and the second cooling fan is arranged on the other side of the first chamber along the first direction. The electronic device is arranged between the first cooling fan and the second cooling fan;

[0030] Wherein, the partition cover is arranged on the side of the first cooling fan away from the second cooling fan along the first direction, or the partition cover is arranged on the side of the second cooling fan away from the first cooling fan along the first direction.

[0031] In some embodiments, the radiator includes a heat exchange main body and a heat dissipation part fixed relative to the heat exchange main body. The heat exchange main body is located in the second chamber;

[0032] A heat exchange port communicating the first chamber and the second chamber is formed on the partition board;

[0033] Wherein, the heat dissipation part is arranged adjacent to the heat exchange port.

[0034] In a second aspect, an embodiment of the present application provides a heating, ventilation and air conditioning (HVAC) system, including:

[0035] The electric control box as described above;

[0036] A compressor;

[0037] An outdoor heat exchanger; and

[0038] An indoor heat exchanger. The compressor, the outdoor heat exchanger, the electric control box and the indoor heat exchanger are connected in sequence.

[0039] The HVAC system and its junction box provided by the embodiment of the present application include a box body, a partition cover and a terminal block. The box body forms an inner cavity. At least part of the partition cover is located in the inner cavity. The installation cavity formed by the partition cover is isolated from the area outside the partition cover and located in the inner cavity. In this way, dust and other impurities in the outside world are difficult to enter the area outside the partition cover and located in the inner cavity, thereby improving the normal operating environment of the internal electrical components. Description of the Drawings

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0041] Figure 1 It is a schematic structural diagram of the HVAC system provided in an embodiment of the present application;

[0042] Figure 2 It is a schematic structural diagram inside the electric control box in an embodiment of the present application;

[0043] Figure 3 For this application Figure 2 It is a schematic structural diagram of another perspective of the structure shown in this application;

[0044] Figure 4 It is a schematic structural diagram inside the electronic control box in an embodiment of this application (the arrow indicates the wind direction);

[0045] Figure 5 For this application Figure 2 It is a schematic structural diagram of another perspective of the structure shown in this application;

[0046] Figure 6 It is an exploded structural diagram of the electronic control box in an embodiment of this application;

[0047] Figure 7 For this application Figure 6 It is a schematic structural diagram of another perspective of the structure shown in this application;

[0048] Figure 8 For this application Figure 6 It is a schematic structural diagram of the partition in the structure shown in this application;

[0049] Figure 9 It is a schematic structural diagram of the heat exchange main body in an embodiment of this application;

[0050] Figure 10 It is a schematic structural diagram when the cover plate is in the second position in an embodiment of this application;

[0051] Figure 11 It is a schematic structural diagram when the cover plate is in the first position in an embodiment of this application;

[0052] Figure 12 For this application Figure 10 It is a schematic structural diagram of another perspective of the structure shown in this application;

[0053] Figure 13 It is a schematic structural diagram when the cover plate is in the second position in another embodiment of this application;

[0054] Figure 14 It is a schematic structural diagram when the cover plate is in the first position in another embodiment of this application;

[0055] Figure 15 It is a schematic structural diagram of the electronic control box in an embodiment of this application;

[0056] Figure 16 For this application Figure 15 It is an enlarged schematic structural diagram of part A in this application.

[0057] Description of the drawings in the figure:

[0058] 1000, HVAC system; 1000a, first heat exchange flow path; 1000b, second heat exchange flow path;

[0059] 100, electric control box;

[0060] 10, box body; 10a, inner cavity; 11a, first chamber; 11b, second chamber; 10b, mounting opening; 10c, drain opening;

[0061] 20, partition cover; 20a, mounting cavity; 20b, wire passing opening; 20c, wire passing cavity; 20d, opening; 21, base; 22, cover plate; 23, baffle; 23a, lapping groove; 24, lapping plate;

[0062] 30, terminal block; 31, first wiring part; 32, second wiring part;

[0063] 40, partition board; 40a, first ventilation opening; 40b, second ventilation opening; 40c, heat exchange opening;

[0064] 50, electronic device; 51, first electronic device; 52, second electronic device;

[0065] 60, radiator; 61, heat exchange main body; 611, first heat exchange pipe; 612, second heat exchange pipe; 613, main path inlet pipe; 614, main path outlet pipe; 615, auxiliary path inlet pipe; 616, auxiliary path outlet pipe; 62, heat dissipation part;

[0066] 70, cooling fan; 71, first cooling fan; 72, second cooling fan;

[0067] 80, plug body; 80a, wire passing channel; 90, flow guiding plate;

[0068] 200, outdoor heat exchanger;

[0069] 300, indoor heat exchanger;

[0070] 400, compressor;

[0071] 500, first expansion valve;

[0072] 600, second expansion valve;

[0073] 700, gas-liquid separator;

[0074] 800, four-way valve;

[0075] XX, first direction; YY, second direction; ZZ, third direction. Detailed implementation mode

[0076] To make the objectives, technical solutions and advantages of this application more clear and understandable, the following further elaborates on this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application.

[0077] An embodiment of this application provides a heating, ventilation, and air conditioning (HVAC) system 1000. The HVAC system 1000 includes systems for heating or cooling such as air conditioners, multi-connected units, heat pumps, etc. The system for heating or cooling can heat a heat transfer medium. The heat transfer medium can be water, ethylene glycol, or other heat transfer media. The source of water can be municipal water or drinking water. In this embodiment, the heat transfer medium in the HVAC system 1000 being municipal water will be used for exemplary illustration hereinafter.

[0078] The HVAC system 1000 generally includes HVAC equipment. HVAC equipment refers to equipment that can be used for temperature regulation of air or water. For example, HVAC equipment can include, but is not limited to, air conditioning equipment, heat pump equipment, multi-connected units, pool machines, or water heaters, etc. HVAC equipment generally includes a water circuit component and a refrigerant component. The water circuit component is used to transport water. The refrigerant component is used to transport refrigerant, and the refrigerant component includes a refrigerant pipeline for transporting refrigerant. Generally, the refrigerant component in HVAC equipment can include a compressor 400, a condenser, and an evaporator, etc. The refrigerant pipeline can be connected between the compressor 400 and the condenser, and between the compressor 400 and the evaporator. The refrigerant pipeline can form a refrigerant flow path with the compressor 400, the condenser, and the evaporator to heat the water in the water circuit component by utilizing the phase change of the refrigerant in the refrigerant flow path.

[0079] Please refer to Figure 1 , the HVAC system 1000 includes an outdoor heat exchanger 200, an indoor heat exchanger 300, a compressor 400, a first expansion valve 500, a second expansion valve 600, and an electric control box 100. The HVAC system 1000 has a first heat exchange flow path 1000a and a second heat exchange flow path 1000b, and the HVAC system 1000 has a cooling mode and a heating mode.

[0080] In the cooling mode, the path of the refrigerant flow is:

[0081] Compressor 400 - Outdoor heat exchanger 200 - Electric control box 100 - Outdoor heat exchanger 200 - Indoor heat exchanger 300 - Compressor 400.

[0082] In the cooling mode, there is refrigerant in both the first heat exchange flow path 1000a and the second heat exchange flow path 1000b. The path of the refrigerant flow on the first heat exchange flow path 1000a is: Compressor 400 - Outdoor heat exchanger 200 - Electric control box 100 - First expansion valve 500 - Indoor heat exchanger 300 - Compressor 400;

[0083] The path of the refrigerant flow on the second heat exchange flow path 1000b is: compressor 400 - outdoor heat exchanger 200 - electronic control box 100 - second expansion valve 600 - compressor 400;

[0084] Among them, the first heat exchange flow path 1000a is the main path, and the second heat exchange flow path 1000b is the auxiliary path. Since the compressor 400 mainly compresses gas, on the second heat exchange flow path 1000b, as Figure 1 shown, a gas-liquid separator 700 is also provided between the second expansion valve 600 and the compressor 400 to filter the liquid refrigerant.

[0085] In the heating mode, the path of the refrigerant flow on the first heat exchange flow path 1000a is: compressor 400 - indoor heat exchanger 300 - first expansion valve 500 - electronic control box 100 - outdoor heat exchanger 200 - compressor 400;

[0086] The path of the refrigerant flow on the second heat exchange flow path 1000b is: compressor 400 - indoor heat exchanger 300 - first expansion valve 500 - electronic control box 100 - second expansion valve 600 - gas-liquid separator 700 - compressor 400;

[0087] It should be noted that the HVAC system 1000 may further include a four-way valve 800. The four-way valve 800 is used to switch the forward and reverse flow directions of the refrigerant to realize the switching between the cooling mode and the heating mode of the HVAC system 1000. In the embodiments of the present application, the HVAC system 1000 in the cooling mode will be taken as an example for illustration.

[0088] For example, in Figure 1 the cooling mode of the HVAC system 1000 shown, when the refrigerant passes through the outdoor heat exchanger 200 and enters the electronic control box 100, the refrigerant is a medium-pressure and medium-temperature liquid-phase refrigerant flow. Then, part of the refrigerant enters the second heat exchange flow path 1000b through the first heat exchange flow path 1000a and becomes a gas-liquid two-phase refrigerant after passing through the second expansion valve 600. At this time, the refrigerant on the first heat exchange flow path 1000a is defined as the first refrigerant, and the refrigerant on the second heat exchange flow path 1000b is defined as the second refrigerant.

[0089] In addition, the first heat exchange flow path 1000a and the second heat exchange flow path 1000b are arranged adjacent to each other. Therefore, the second refrigerant absorbs heat from the first refrigerant flow on the first heat exchange flow path 1000a during the flow along the second heat exchange flow path 1000b and further vaporizes, so that the first refrigerant is further subcooled, improving the cooling efficiency.

[0090] It should be noted that the "first" and "second" of the first heat exchange flow path 1000a, the second heat exchange flow path 1000b, the first refrigerant, and the second refrigerant flow are only used to distinguish different heat exchange flow paths and refrigerants, and should not be regarded as a limitation on the specific applications of the heat exchange flow paths and refrigerants. For example, in other embodiments or working modes, it may be the first refrigerant flowing through the first heat exchange flow path 1000a that absorbs heat from the second refrigerant in the second heat exchange flow path 1000b, and the states of the first refrigerant and the second refrigerant are not limited to the liquid phase or the gas-liquid two-phase defined above.

[0091] Reference Figures 2 - 3 , generally, an electric control box 100 is provided in the HVAC equipment to control the water circuit assembly through the electric control box 100. The electric control box 100 includes a box body 10, a partition cover 20, and a terminal block 30.

[0092] The box body 10 generally includes a plurality of side shells, such as an upper side shell, a lower side shell, a front side shell, and a rear side shell, etc. The adjacent side shells are also connected together by means of screws or buckles, etc. The plurality of side shells enclose to form an inner cavity 10a. Some electrical components can be placed in the inner cavity 10a. An installation opening 10b is opened on one of the side shells. Generally speaking, this side shell is the lower side shell. The setting of the installation opening 10b can enable the wire to pass through the installation opening 10b to electrically connect the external power supply device with the electrical components in the inner cavity 10a.

[0093] Refer to Figures 3 - 4 , exemplarily, the box body 10 can be a rectangular box body. Of course, the shape of the box body 10 is not limited to the rectangle above, and it can also be other shapes. For example, the box body 10 can also be a cylindrical box body or a special-shaped box body, etc. In addition, when assembling the electric control box, any suitable surface can be selected for fixing.

[0094] The partition cover 20 is arranged in the inner cavity 10a and covers the installation opening 10b. The partition cover 20 forms an installation cavity 20a, and the installation cavity 20a is isolated from the area outside the partition cover 20 and located in the inner cavity 10a.

[0095] The terminal block 30 is at least partially located in the installation cavity 20a. The main function of the terminal block 30 is to connect wires, and it allows the wires of the external power supply device to be connected to the wires of the electronic devices in the inner cavity 10a. Specifically, the wires of the external power supply device enter the installation cavity 20a through the installation opening 10b and are connected to the corresponding terminal terminals on the terminal block 30.

[0096] In this embodiment, since the external wire is only electrically connected to the terminal block 30 in the installation cavity 20a, and the installation cavity 20a is isolated from the area outside the partition cover 20 and inside the inner cavity 10a, thus, it is difficult for external dust and other impurities to enter the area outside the partition cover 20 and inside the inner cavity 10a through the connection between the external wire and the terminal block 30, thereby avoiding short circuits caused by the accumulation of dust and other impurities, and further improving the normal operating environment of the internal electrical components.

[0097] Referring to Figures 1 - 2 , in the embodiment of the present application, by locating the partition cover 20 inside the inner cavity 10a, the overall appearance of the electric control box 100 looks neat and generous, which is convenient for the modular design of the entire electric control box 100. In addition, when the partition cover 20 is located inside the inner cavity 10a, it can also reduce the interference and damage of the external environment to the terminal block 30 located in the installation cavity 20a.

[0098] Inside the electric control box 100, referring to Figures 5 - 6 , the electric control box 100 further includes a partition board 40, electronic devices 50 (also known as electrical components), a radiator 60, and a cooling fan 70.

[0099] The partition board 40 is disposed inside the inner cavity 10a of the box body 10 and divides the inner cavity 10a into a first chamber 11a and a second chamber 11b. The partition board 40 is provided with a first ventilation opening 40a and a second ventilation opening 40b which are arranged at intervals. Both the first ventilation opening 40a and the second ventilation opening 40b communicate with the first chamber 11a and the second chamber 11b. The partition board 40 can be fixed to the box body 10 by means of screws or welding, etc. The exchange of air flow between the first chamber 11a and the second chamber 11b is realized through the first ventilation opening 40a and the second ventilation opening 40b. One of them is a low-temperature chamber, and the other is a high-temperature chamber. At least part of the radiator 60 (not shown in the figure) is located in the low-temperature chamber, while the electronic devices 50 that generate heat during operation are located in the high-temperature chamber.

[0100] The electronic devices 50 are arranged in the first chamber 11a, and the chamber where the electronic devices 50 are located is the high-temperature chamber, while the second chamber 11b is the low-temperature chamber.

[0101] The cooling fan 70 is arranged in one of the first chamber 11a and the second chamber 11b, and is used to make the air flow circulate between the first chamber 11a and the second chamber 11b. The number of the cooling fans 70 can be set to be multiple, and can be distributed according to the position of the electronic devices 50 so that the circulating air flow passes through the electronic devices 50 more.

[0102] Through the guiding action of the cooling fan 70, the air flow circulates between the first chamber 11a and the second chamber 11b, thereby cooling the electronic devices 50.

[0103] In addition, in this embodiment, please refer toFigure 6 , the first vent 40a is provided at the upper end of the second vent 40b. In this way, when the electronic device 50 generates heat, the temperature of the air in the first chamber 11a is relatively high. The cooling fan 70 sends the hot air into the second vent 40b. Since the density of the hot air is relatively small, the hot air naturally rises to contact the radiator 60 provided in the second chamber 11b. The radiator 60 is used to cool the hot air to form cold air. The cold air flows into the first chamber 11a from the first vent 40a. The cooling fan 70 is used to accelerate the cold air, so as to use the cold air to cool the electronic device 50 provided in the first chamber 11a. The temperature of the cold air after heat exchange with the electronic device 50 rises. The cold air with the increased temperature further enters the second vent 40b under the action of the cooling fan 70. In this way, the electronic device 50 provided in the inner cavity 10a is cooled by means of internal circulation, and there will be no negative pressure difference with the external environment to suck impurities such as dust and iron filings from the outside into the first chamber 11a and the second chamber 11b.

[0104] Among them, the cooling fan 70 is preferably provided in the first chamber 11a, which can accelerate the flow rate of the air in the first chamber 11a, and then accelerate the circulation speed of the air between the first chamber 11a and the second chamber 11b, and improve the heat dissipation efficiency of the electronic device 50.

[0105] Furthermore, please continue to refer to Figure 6 , the cooling fan 70 can be arranged at a position close to the first vent 40a, so that the cold air at the top of the first chamber 11a can enter the second chamber 11b in time, and the cooling fan 70 can accelerate the cold air to improve the heat dissipation efficiency of the electronic device 50.

[0106] A wind guide cover (not shown in the figure) can also be arranged in the first chamber 11a. The wind guide cover covers the cooling fan 70 and is used to guide the air blown out by the cooling fan 70 so that the air outlet direction of the cooling fan 70 faces the electronic device 50.

[0107] In order to facilitate the wiring of the wiring seat 30 and the electronic device 50 in the inner cavity 10a, and to prevent the interference and damage of the external environment to the wiring seat 30, the wiring seat 30 and the partition cover 40 are both located in the inner cavity 10a.

[0108] It should be understood that in the embodiment of the present application, please refer to Figures 6 - 7 , the radiator 60 includes a heat exchange main body 61. The refrigerant flowing through the heat exchange main body 61 can exchange heat with the heat generated by the electronic device 50. Among them, the heat exchange main body 61 is located in the second chamber 11b, and the second chamber 11b can have sufficient space for the distribution of the heat exchange main body 61.

[0109] Since in the embodiments of the present application, heat exchange can be performed between the refrigerant flowing through the HVAC system 1000 and the air flow inside the electronic control box 100, there is no need to provide heat dissipation holes in the electronic control box 100, and the air flow inside the electronic control box 100 can also be cooled.

[0110] Further, referring to Figures 6 - 7 , the heat exchange body 61 includes a first heat exchange pipe 611, a second heat exchange pipe 612, a main path inlet pipe 613, a main path outlet pipe 614, a secondary path inlet pipe 615, and a secondary path outlet pipe 616. Among them, the main path inlet pipe 613, the first heat exchange pipe 611, and the main path outlet pipe 614 are located on the first heat exchange flow path 1000a. In the refrigeration mode, the first refrigerant sequentially flows through the main path inlet pipe 613, the first heat exchange pipe 611, and the main path outlet pipe 614, and the second refrigerant sequentially passes through the secondary path inlet pipe 615, the second heat exchange pipe 612, and the secondary path outlet pipe 616.

[0111] Among them, in order to increase the heat exchange efficiency between the first refrigerant and the second refrigerant, a plurality of first heat exchange pipes 611 and second heat exchange pipes 612 are provided. That is, the main path inlet pipe 613, the main path outlet pipe 614, the secondary path inlet pipe 615, and the secondary path outlet pipe 616 also play a role of collecting flow, so as to Figure 9 Taking the shown orientation as a reference, along the second direction YY, that is, the front-back direction, the first heat exchange pipes 611 and the second heat exchange pipes 612 are staggered. Specifically, in the embodiments of the present application, the second heat exchange pipes 612 are arranged on both sides of the first heat exchange pipes 611.

[0112] Considering the miniaturized design of the entire electronic control box 100, the first heat exchange pipes 611 and the second heat exchange pipes 612 extend along the first direction XX, and the main path inlet pipe 613, the main path outlet pipe 614, the secondary path inlet pipe 615, and the secondary path outlet pipe 616 are all arranged at both ends of the first heat exchange pipes 611 and the second heat exchange pipes 612 along the first direction XX. Among them, the main path inlet pipe 613 and the secondary path outlet pipe 616 are located upstream of the first heat exchange pipe 611, and the main path outlet pipe 614 and the secondary path inlet pipe 615 are located downstream of the first heat exchange pipe 611. In this way, the internal space of the electronic control box 100 can be reasonably utilized, so that the internal structure is compactly distributed, which is conducive to the miniaturized design of the electronic control box 100.

[0113] In some embodiments, in order to reduce the overall length of the heat exchange body 61, the two ends of the first heat exchange pipes 611 and the second heat exchange pipes 612 along the first direction XX can be bent toward the second direction YY, which can reduce the overall length of the heat exchange body 61 under the condition of ensuring that the heat exchange body 61 has a sufficient extension length, and further reduce the length of the electronic control box 100 along the first direction XX that cooperates with the radiator 60, so as to reduce the volume of the electronic control box 100.

[0114] Further, to improve the heat exchange efficiency, in the embodiments of the present application, the radiator 60 includes a heat dissipation part 62 fixed relative to the heat exchange main body 61. That is, the heat dissipation part 62 can be fixed on the partition plate 40 or on the heat exchange main body 61. And to improve the heat exchange efficiency between the heat exchange main body 61 and the heat dissipation part 62, the heat dissipation part 62 is designed to fit the heat exchange main body 61, which can further improve the heat exchange efficiency.

[0115] Among them, please continue to refer to Figures 6 - 7 , a heat exchange port 40c communicating the first chamber 11a and the second chamber 11b is formed on the partition plate 40, and the heat dissipation part 62 is arranged adjacent to the heat exchange port 40c, which can enable the heat dissipation part 62 to exchange heat with the gas in the first chamber 11a more quickly, that is, can quickly cool the electronic device 50.

[0116] In some embodiments, the heat dissipation part 62 is in a plate-like structure, and the heat dissipation part 62 fits on the main surface of the heat exchange main body 61 to increase the contact area between the heat dissipation part 62 and the heat exchange main body 61, thereby improving the heat conduction efficiency.

[0117] Based on the fact that the heat dissipation part 62 is in a plate-like structure, the heat dissipation part 62 can be made of a metal plate or an alloy plate with good heat conduction performance. For example, the heat dissipation part 62 can be made of an aluminum plate, a copper plate, an aluminum alloy plate, etc., to improve the heat conduction efficiency.

[0118] In other embodiments, the heat dissipation part 62 is a heat dissipation fin, and the heat dissipation fin can be connected to the surface of the heat exchange main body 61 by welding, bonding or fastening connection. By setting a small number of heat dissipation fins with a large surface area, on the one hand, it is convenient to connect the heat dissipation fins to the heat exchange main body 61, improving the installation efficiency of the heat dissipation fins and the heat exchange main body 61; on the other hand, it can also increase the contact area between the heat dissipation fins and the air, enhancing the heat exchange effect.

[0119] It can be understood that if the heat dissipation part 62 is arranged adjacent to the heat exchange port 40c, the electronic device 50 in the first chamber 11a is also arranged adjacent to the heat exchange port 40c. In this way, the heat exchange efficiency can be greatly improved.

[0120] The flow of the refrigerant makes the temperature of the heat dissipation part 62 relatively low. Since the electronic device 50 in the electronic control box 100 generates heat, the temperature in the inner cavity of the electronic control box 100 is relatively high. When the air with a high temperature in the electronic control box 100 contacts the heat dissipation part 62, it is easy to condense, and then condensed water is formed on the surface of the electronic device 50. If the generated condensed water flows to the position of the electronic device 50, it is easy to cause the electronic device 50 to short-circuit or be damaged, and more seriously, it will pose a fire hazard.

[0121] Therefore, the first heat exchange flow path 1000a in the heat exchange body 61 can be divided into an upstream end and a downstream end along the flow direction of the first refrigerant, and the second heat exchange flow path 1000b in the heat exchange body 61 can also be divided into an upstream end and a downstream end along the flow direction of the first refrigerant. As Figures 6 - 7 shown, along the first direction XX, the upstream end of the first heat exchange flow path 1000a and the downstream end of the second heat exchange flow path 1000b are on the same side, the downstream end of the first heat exchange flow path 1000a and the upstream end of the second heat exchange flow path 1000b are on the same side, and the second refrigerant can absorb heat from the first heat exchange flow path 1000a during the flowing process. Therefore, the temperature of the first heat exchange flow path 1000a gradually decreases in the direction from the upstream end to the downstream end, that is, the temperature of the upstream end of the first heat exchange flow path 1000a is higher than that of the downstream end. Similarly, the temperature of the second heat exchange flow path 1000b gradually increases in the direction from the upstream end to the downstream end, that is, the temperature of the upstream end of the second heat exchange flow path 1000b is lower than that of the downstream end.

[0122] Since the upstream end of the first heat exchange flow path 1000a and the downstream end of the second heat exchange flow path 1000b have a higher temperature and are on the same side, the temperature of this side is relatively high, and the temperature difference from the hot air is small, so no condensate will be generated or the amount of generated condensate is small. By arranging the electronic device 50 at a position close to the upstream end of the first heat exchange flow path 1000a, the probability of the electronic device 50 contacting the condensate can be reduced, thereby protecting the electronic device 50.

[0123] In addition, due to the presence of the partition plate 40, the electronic device 50 is located in the first chamber 11a, while the heat exchange body 61 is located in the second chamber 11b. In this way, even if there is condensate on the heat exchange body 61, it is difficult to enter the first chamber 11a, thus ensuring a normal operating environment for the electronic device 50.

[0124] Furthermore, if a large amount of condensate is generated on the heat exchange body 61, in order to prevent the condensate from possibly corroding the shell of the electric control box 100 in the electric control box 100, in the embodiment of the present application, as Figure 8 shown, a flow guide plate 90 can be arranged in the electric control box 100. Specifically, the flow guide plate 90 is arranged in the second chamber 11b, and the flow guide plate 90 is arranged on the lower side of the heat exchange body 61 along the gravity direction for collecting the condensate dripping from the heat exchange body 61. The arrangement of the flow guide plate 90 can not only reduce the dripping height of the condensate, thereby reducing the noise, but also the flow guide plate 90 has a certain accumulation effect on the condensate, which is convenient for collecting the condensate and discharging it from the electric control box 100 together.

[0125] Furthermore, in order to facilitate the timely discharge of the condensate on the flow guide plate 90 from the electric control box 100, a drain port 10c can also be opened on the bottom wall of the box body, as Figure 8As shown in the figure, the deflector 90 is inclined relative to the bottom wall of the electronic control box 100, and the condensed water is discharged from the electronic control box 100 through the drain port 10c after being deflected by the deflector 90.

[0126] Since the heat generated by the electronic device 50 is relatively large and it is difficult to exchange heat for all the gas through the heat dissipation part 62, in order to quickly take away the heat of the electronic device 50, in the embodiment of the present application, please refer to Figure 6 As the electronic device 50 is located in the first chamber 11a, the cooling fan 70 is located in the first chamber 11a. In this way, the cooling fan 70 can quickly blow the heat of the electronic device 50 from the first chamber 11a into the second chamber 11b, so as to exchange heat with the heat exchange main body 61 and the heat dissipation part 62.

[0127] More specifically, the cooling fan 70 includes a first cooling fan 71 and a second cooling fan 72. The first cooling fan 71 is arranged on one side of the first chamber 11a along the first direction XX, and the second cooling fan 72 is arranged on the other side of the first chamber 11a along the first direction XX. The electronic device 50 is arranged between the first cooling fan 71 and the second cooling fan 72.

[0128] As Figure 6 shown, there are various types of electronic devices 50. Among them, multiple electronic devices 50 are installed on the partition plate 40 and distributed along the third direction ZZ. Along the third direction ZZ, the first electronic device 51 is located at the upper end and the second electronic device 52 is located at the lower end. The air outlet side of the first cooling fan 71 faces the first electronic device 51, and the air outlet side of the second cooling fan 72 faces the second electronic device 52. Along the third direction ZZ, the first cooling fan 71 is located above the second cooling fan 72. Among them, the first direction XX, the second direction YY, and the third direction ZZ are perpendicular to each other.

[0129] Therefore, after the first cooling fan 71 blows cold air to the first electronic device 51, it is blown to the second electronic device 52 through the second cooling fan 72. In this way, through the first cooling fan 71 and the second cooling fan 72, the air flow can form a cycle in the first chamber 11a and the second chamber 11b, improving the cooling speed of the electronic device 50.

[0130] See Figures 2 - 4Furthermore, the shield 20 is located at the side of the first chamber 11a, and can be arranged on the side of the first cooling fan 71 away from the second cooling fan 72 along the first direction XX, or can be arranged on the side of the second cooling fan 72 away from the first cooling fan 71 along the first direction XX. In this way, the existence of the shield 20 will not block the flow of the circulating airflow and will not affect the heat dissipation of the electronic device 50. In order to make the overall structure of the shield 20 more compact, and to make the remaining space of the first chamber 11a larger, so as to accommodate more electronic devices 50 or reserve more space, so as to facilitate possible future expansion or maintenance, Figure 3 The orientation shown is for reference only, with the shroud 20 being located at the lower left corner of the first chamber 11 a .

[0131] In addition, based on the position of the partition cover 20 at the lower left corner of the first chamber 11a, the terminal block can be closer to the installation port, which is convenient for wiring the terminal block with the outside. On the other hand, the partition cover 20 and the electronic device 50 are staggered, which also makes the internal structure of the electric control box compact, facilitating the miniaturization design of the electric control box.

[0132] In this example, see Figures 10 - 11 The wiring socket 30 in the electric control box 100 is provided with a first wiring part 31 and a second wiring part 32. The second wiring part 32 is electrically connected to the first wiring part 31. The first wiring part 31 is electrically connected to the power supply equipment located outside the electric control box 100 through wires, and the second wiring part 32 is electrically connected to the electronic device 50 located in the inner cavity 10a of the electric control box 100 through wires. In this way, the power transmission of the power supply equipment inside and outside the electric control box 100 can be realized.

[0133] In one embodiment, please continue to refer to Figures 9 - 10 The second wiring part 32 is separated from the first wiring part 31 by the partition cover 20, that is, the second wiring part 32 is located outside the installation cavity 20a, and the first wiring part 31 is located inside the installation cavity 20a. The partition cover 20 does not cover the second wiring part 32, and only needs to cover the first wiring part 31. In this way, for the junction box 100, the space occupied by the entire first wiring part 31 is smaller, and the partition cover 20 only needs to cover the first wiring part 31, thereby reducing the manufacturing cost.

[0134] In another embodiment, see Figures 12 - 14 The second wiring portion 32 and the first wiring portion 31 are both located in the installation cavity 20a, and a threading hole (not shown in the figure) is provided on the partition cover 20, and a sealing member (not shown in the figure) is provided in the threading hole. Since the first wiring portion 31 and the second wiring portion 32 are not separated by the partition cover 20, the manufacturing process of the entire junction box 100 is simplified, and the overall manufacturing process difficulty is reduced.

[0135] Continuing from the above, the wire passing hole is for the wires connecting the electrical components in the inner cavity 10a and the second wiring part 32 to pass through. In order to prevent external dust from entering the inner cavity 10a through the wire passing hole, a seal is provided in the wire passing hole. The seal can be an elastic rubber plug such as a rubber dust plug or a silica gel dust plug, or it can be an elastic sealing ring. The rubber dust plug and the sealing ring can be arranged in the wire passing hole by embedding, or fixed at the wire passing hole by means of glue or the like.

[0136] Exemplarily, in this embodiment, the seal is a rubber dust plug, and a channel for the wire to pass through is formed inside it. When not squeezed, the cross-sectional area of its internal channel is larger than the cross-sectional area of the wire. When the wire passes through the internal channel of the rubber dust plug, under the elastic action, the inner wall of the rubber dust plug can be closely attached to the wire, and the outer wall of the rubber dust plug can also be attached to the inner side wall of the wire passing hole. In this way, the sealing effect of the seal can be maximally guaranteed, thereby preventing dust from entering the inner cavity 10a through the wire passing hole.

[0137] It should be understood that in order to ensure that the entire wiring seat 30 is not interfered with and damaged by the external environment, the entire wiring seat 30 is located in the inner cavity 10a. Specifically in this embodiment, it is preferred that the first wiring part 31 and the second wiring part 32 are located in the inner cavity 10a, and the first wiring part 31 is simultaneously located in the installation cavity 20a, while the second wiring part 32 is located outside the installation cavity 20a.

[0138] In this embodiment, please refer to Figures 11 - 12 , the partition cover 20 includes a base 21 and a cover plate 22.

[0139] The base 21 can be fixed to the box body 10 by means of screws, bolts or buckles, etc. The wiring seat 30 can be fixedly connected by means of screws, bolts or buckles, etc., or can be integrally injection-molded. In this embodiment, it is preferred to adopt the way of integrally injection-molded connection, that is, the base 21 and the wiring seat 30 are integrally injection-molded. In this way, the base 21 and the wiring seat 30 have higher structural stability. Secondly, the integrally injection-molded wiring seat 30 has a neat and beautiful appearance, without redundant connecting parts such as screws, bolts or buckles, improving the overall aesthetic degree. At the same time, the neat appearance is also beneficial to keeping the product clean and reducing the accumulation of dust and other impurities. On the other hand, the integrally injection-molded wiring seat 30 has better sealing performance, which can effectively prevent the intrusion of external factors such as moisture and dust, and protect the normal operation of the internal electrical components.

[0140] In addition, since the wiring seat 30 and the base 21 are integrally injection-molded, the base 21 and the wiring seat 30 are assembled during the manufacturing process, which is convenient to assemble them together into the electric control box 100, and the assembly is more convenient.

[0141] Among them, the base is formed with a wire passing opening, the cover plate 22 is movably connected to the base 21, the cover plate 22 has a first position and a second position. In the first position, the cover plate 22 is connected to the base 21 and encloses to form an installation cavity 20a, and the installation cavity 20a communicates with the wire passing opening 20b; in the second position, at least part of the wiring base 30 is exposed by the cover plate 22.

[0142] When the cover plate 22 is in the first position, through the cooperation of the cover plate 22 and the base 21, the cover plate 22 provides good protection for the wiring base 30, and can play a role in protecting the wiring base 30 and preventing dust, etc. The design of the wire passing opening 20b enables the wires to enter the interior of the installation cavity 20a orderly to be connected to the wiring base 30, avoiding the chaos and entanglement of the wires, and improving the overall aesthetics of the electric control box 100; when the cover plate 22 is in the second position, the installation cavity 20a is exposed, which is convenient for users to wire and repair the wiring base 30.

[0143] Combined with Figures 10 - 11 , the partition cover 20 further includes a baffle 23, the baffle 23 is fixed relative to the base 21, and the baffle 23 can be fixedly connected to the base 21 by means of screws, bolts or buckles, etc., or can be integrally injection molded with the base 21. In this embodiment, in order to ensure the strength of the structure, the integrally injection molded connection method is preferably adopted.

[0144] When the cover plate 22 is in the first position, the baffle 23 and the cover plate 22 are on the same side of the base 21, and the baffle 23 is located on the side where the wire passing opening 20b is located. A wire passing cavity 20c communicating with the installation cavity 20a is formed between the baffle 23 and the base 21, and an opening 20d is formed on the side of the wire passing cavity 20c away from the wire passing opening 20b.

[0145] The wires connected to external electrical components can be sequentially passed through the opening 20d, the wire passing cavity 20c and the wire passing opening 20b, and finally enter the installation cavity 20a to be connected to the wiring base 30. Since the baffle 23 is fixed relative to the base 21, when the cover plate 22 is opened, the wires still pass through the wire passing cavity 20c orderly and extend into the installation cavity 20a, which not only improves the cleanliness of the electric control box 100, but also helps to improve the maintenance efficiency and safety of the electric control box 100.

[0146] When the partition cover 20 is arranged inside the inner cavity 10a, in order to make the overall structure of the partition cover 20 more compact and also to make the remaining space in the inner cavity 10a larger to accommodate more electrical components or reserve more space for future possible expansion or maintenance, generally the partition cover 20 is arranged on the lower side shell of the electric control box 100, and the installation opening 10b is also opened on this lower side shell, so that the opening 20d faces downward and is arranged directly opposite to the installation opening 10b, and the side of the baffle 23 close to the opening 20d fits on the inner wall of the lower side shell of the electric control box 100. In this way, with the blocking of the baffle 23, when the cover plate 22 moves, it effectively prevents the cover plate 22 from directly contacting the lower side shell of the box body 10, thus avoiding possible friction and wear. This not only extends the service life of the electric control box 100 but also improves the overall stability and reliability.

[0147] On the other hand, when the base 21 and the baffle 23 are attached to the lower side shell of the electric control box 100 and the installation opening 10b is also opened on the lower side shell, the wires are more direct and convenient when entering and leaving the junction box 100, reducing the space occupied by the wires in the inner cavity 10a. This not only reduces the manufacturing cost but also facilitates the arrangement and management of the wires.

[0148] In addition, since the baffle 23 is fixed relative to the base 21, a sealing ring or gasket can be arranged between the contact surface of the baffle 23 and the lower side shell of the electric control box 100 to prevent external dust and other substances from entering the inner cavity 10a, and the space outside the junction box 100 can effectively avoid the influence of external dust and other substances on the electrical components in the inner cavity 10a.

[0149] Furthermore, in order to reduce the influence of impurities such as dust and water droplets entering the installation cavity 20a on the terminal block 30, a plug body 80 is arranged at the opening 20a, as Figures 15 - 16 shown. A wire passing channel 80a is formed in the plug body 80, and the wire passing channel 80a is communicated with the installation cavity 20a, that is, communicated with the wire passing cavity 100c and the installation cavity 20a. The setting of the wire passing channel 80a extends the path for dust and water droplets and other impurities to enter the wire passing cavity 20c and the installation cavity 20a. Therefore, to a certain extent, it reduces the possibility of dust and water droplets and other impurities entering the wire passing cavity 20c and the installation cavity 20a, ensuring the wiring stability of the terminal block 30.

[0150] The plug body 80 can be installed at the opening 20d by means of buckles, screws or adhesives, etc., which is specifically set according to the material of the plug body 80 and the actual situation, and no more restrictions are made here.

[0151] Continuing from the above, please continue to refer to Figures 10 - 11, when the partition cover 20 is arranged inside the inner cavity 10a, since the cover plate 22 needs to move to facilitate wiring or maintenance of the wiring seat 30, when the cover plate 22 is in the first position, in order to prevent external dust from entering the space outside the partition cover 20 in the inner cavity 10a through the gap between the cover plate 22 and the baffle 23, it is necessary to pay attention to the seal between the cover plate 22 and the baffle 23. Therefore, in this embodiment, the partition cover 20 further includes a lapping plate 24, the lapping plate 24 is fixed relative to the cover plate 22, when the cover plate 22 is in the first position, the lapping plate 24 is lapped on the baffle 23, and when the cover plate 22 is in the second position, the lapping plate 24 is separated from the baffle 23.

[0152] When the cover plate 22 is in the closed state (i.e., the first position), the lapping plate 24 will be lapped on the baffle 23, forming a tight contact surface. This design can effectively prevent dust, moisture or other pollutants from entering the inner cavity 10a through the gap between the cover plate 22 and the baffle 23, thus protecting the normal use of the internal electrical components.

[0153] It can be understood that the lapping plate 24 and the cover plate 22 can be fixedly connected by means of screws, bolts or buckles, etc., or can be integrally injection-molded. In this embodiment, for the consideration of sealing performance and structural strength, the lapping plate 24 and the cover plate 22 are of an integrally injection-molded structure.

[0154] Furthermore, please continue to refer to Figure 9 , a lapping groove 23a is formed on the side of the baffle 23 facing away from the wire passing cavity 20c. When the cover plate 22 is in the first position, at least part of the lapping plate 24 is located in the lapping groove 23a and fits with the inner wall of the lapping groove 23a, that is, the lapping plate 24 can be partially located in the lapping groove 23a and fit with the inner wall of the lapping groove 23a, or the lapping plate 24 can be completely located in the lapping groove 23a and fit with the inner wall of the lapping groove 23a. Both implementation methods can play a sealing role, but in this embodiment, in order for the entire partition cover 20 to occupy a smaller space in the inner cavity 10a, so as to give more installation space for the electrical components in the inner cavity 10a, the lapping plate 24 is completely located in the lapping groove 23a and fits with the inner wall of the lapping groove 23a.

[0155] That is, the lapping plate 24 is completely embedded in the lapping groove 23a and fits tightly with the inner wall of the lapping groove 23a, forming an almost gapless sealing surface. This greatly enhances the sealing performance between the cover plate 22 and the baffle 23, effectively preventing external dust, moisture or other pollutants from entering the inner cavity 10a, thus ensuring the safety and stability of the internal electronic devices 50.

[0156] Due to the tight fit between the lapping plate 24 and the lapping groove 23a, the whole structure is more stable in the first position (i.e., the closed state). This helps to reduce the risk of accidental opening of the cover plate 22 caused by factors such as vibration or impact, and improves the reliability and safety of the equipment.

[0157] In addition, although the sealing performance and structural stability are enhanced, this design does not increase the complexity of operation. When it is necessary to open the cover plate 22, it can be operated according to the normal steps, and no additional tools or steps are required to release the cooperation between the overlapping plate 24 and the overlapping groove 23a.

[0158] Based on the previous embodiment, please continue to refer to Figure 10 , the overlapping groove 23a extends to the end face of the baffle 23 away from the opening 20d. In this way, during the grooving process, the difficulty of grooving is reduced, and the manufacturing personnel can more easily determine the starting and ending positions of grooving. This reduces the measurement and positioning steps required during the processing, and the processing equipment can more easily cut or punch along the predetermined path. This helps to reduce processing errors and improve the accuracy and consistency of the overlapping groove 23a.

[0159] When the cover plate 22 is in the first position, the cover plate 22 fits against the end face of the baffle 23 away from the opening 20d. The cover plate 22 and the end face of the baffle 23 form a tight contact surface, thus effectively preventing external dust, moisture or other pollutants from entering the inner cavity 10a through the gap between them. This structure, combined with the tight fit between the overlapping plate 24 and the overlapping groove 23a described above, can greatly improve the sealing performance between the installation cavity 20a and the remaining space of the inner cavity 10a when the cover plate 22 is in the first position (i.e., the closed state), and can prevent external dust, moisture or other pollutants from entering the remaining space of the inner cavity 10a through the gap between them.

[0160] Furthermore, please continue to refer to Figure 9 , the cover plate 22 and the base 21 are rotatably connected on one side of the base 21. For example, the cover plate 22 can be connected to the base 21 through a hinge, so that the cover plate 22 can rotate relative to the base 21; or, both the cover plate 22 and the base 21 are provided with rotating shaft holes, and the rotating shaft is arranged in the rotating shaft holes of the cover plate 22 and the base 21, so that the cover plate 22 can rotate relative to the base 21; or, one of the cover plate 22 and the base 21 is provided with a rotating shaft hole, and the other is provided with a rotating shaft, and the rotating shaft is arranged in the rotating shaft hole, so that the cover plate 22 can rotate relative to the base 21.

[0161] The cover plate 22 can rotate relative to the base 21 to the first position and the second position. When the cover plate 22 rotates to the first position, the cover plate 22 covers the wiring seat 30 located in the installation cavity 20a; when the cover plate 22 rotates to the second position, the cover plate 22 is opened so that the wiring seat 30 located in the installation cavity 20a is exposed, thereby performing operations such as maintenance or wiring of the wiring seat 30.

[0162] The cover plate 22 is detachably connected to the base 21 on the other side of the base 21. This side can be the adjacent side or the opposite side to the side where the cover plate 22 is rotatably connected to the base 21. In this embodiment, there is no further limitation.

[0163] The detachable connection method can specifically be that the cover plate 22 and the base 21 respectively have magnetic components, and the magnetic components on the cover plate 22 and the base 21 are magnetically different. When the cover plate 22 is in the first position, the two magnetic components attract each other, making the cover plate 22 and the base 21 relatively fixed; or, the cover plate 22 and the base 21 respectively have buckles. When the cover plate 22 is in the first position, the buckle on the cover plate 22 and the buckle on the base 22 can be snap-connected, making the cover plate 22 and the base 21 relatively fixed. In this way, after the cover plate 22 is in the first position, the cover plate 22 is not likely to shake, which can ensure the stability of the entire partition 20, and at the same time, it can also prevent external substances such as dust from easily entering the remaining space of the inner cavity 10a from the installation cavity 20a.

[0164] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application 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. Therefore, the terms describing the position relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0165] The above are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of this application should be included in the protection scope of this application.

Claims

1. An electric control box for a HVAC system, characterized in that: include: A box body is formed with an inner cavity and a mounting opening communicated with the inner cavity; A partition cover is arranged in the inner cavity and covers the installation opening, the partition cover forms an installation cavity, and the installation cavity is isolated from the area outside the partition cover and located in the inner cavity; as well as The wiring seat is at least partially located in the installation cavity.

2. The electric control box according to claim 1, characterized in that: The wiring seat is provided with a first wiring portion and a second wiring portion, wherein the second wiring portion is electrically connected to the first wiring portion. The second wiring portion is separated from the first wiring portion by the partition cover; or, the second wiring portion and the first wiring portion are both located in the installation cavity, the partition cover is provided with a threading hole, and a sealing member is provided in the threading hole.

3. The electric control box according to claim 1, characterized in that: The shroud comprises: A base, the wiring seat is fixed relative to the base, and the base is formed with a wire passing opening; and A cover plate is movably connected to the base, and the cover plate has a first position and a second position. In the first position, the cover plate is connected to the base and encloses the installation cavity, and the installation cavity is connected to the wire passing port; in the second position, the cover plate exposes at least a portion of the wiring seat.

4. The electric control box according to claim 3, characterized in that: The shield also includes: The baffle is fixed relative to the base. When the cover plate is in the first position, the baffle and the cover plate are located on the same side of the base, and the baffle is located on the side where the wire passing opening is located. A wire passing cavity connected to the installation cavity is formed between the baffle and the base, and the wire passing cavity forms an opening on the side away from the wire passing opening.

5. The electric control box according to claim 4, characterized in that: The shield also includes: The lap plate is fixed relative to the cover plate. When the cover plate is in the first position, the lap plate is overlapped on the baffle plate. When the cover plate is in the second position, the lap plate is separated from the baffle plate.

6. The electric control box according to claim 5, characterized in that: The baffle forms a lap groove on a side away from the wire passage cavity. When the cover plate is in the first position, the lap plate is at least partially located in the lap groove and fits against the inner wall of the lap groove.

7. The electric control box according to claim 6, characterized in that: The overlapping groove extends to an end surface of the baffle facing away from the opening; And / or, when the cover plate is in the first position, the cover plate is in contact with an end surface of the baffle plate that is away from the opening.

8. The electric control box according to claim 3, characterized in that: The cover plate is rotatably connected to the base at one side of the base, and the cover plate is detachably connected to the base at the other side of the base.

9. The electric control box according to claim 1, characterized in that: Also includes: A partition is provided in the inner cavity of the box body and divides the inner cavity into a first chamber and a second chamber, and a first vent and a second vent are provided on the partition, and the first vent and the second vent are both connected to the first chamber and the second chamber; An electronic device is disposed in the first chamber; a heat sink, at least partially disposed in the second chamber; a cooling fan, disposed in one of the first chamber and the second chamber, for circulating air between the first chamber and the second chamber; Wherein, the installation port is communicated with the first chamber, and the partition cover is located in the first chamber.

10. The electric control box according to claim 9, characterized in that: The partition cover is located at a side of the first chamber.

11. The electric control box according to claim 10, characterized in that: The cooling fan and the electronic device are both located in the first chamber; The cooling fan comprises a first cooling fan and a second cooling fan, the first cooling fan is arranged at one side of the first chamber along a first direction, the second cooling fan is arranged at the other side of the first chamber along the first direction, and the electronic device is arranged between the first cooling fan and the second cooling fan; The shield is disposed on a side of the first cooling fan away from the second cooling fan along the first direction, or the shield is disposed on a side of the second cooling fan away from the first cooling fan along the first direction.

12. The electric control box according to claim 9, characterized in that: The radiator comprises a heat exchange body and a heat dissipation portion fixed relative to the heat exchange body, and the heat exchange body is located in the second chamber; The partition is provided with a heat exchange port communicating with the first chamber and the second chamber; Wherein, the heat dissipation portion is arranged adjacent to the heat exchange port.

13. A HVAC system, characterized in that: include: The electric control box according to any one of claims 1 to 12; compressor; Outdoor heat exchanger; as well as The indoor heat exchanger, the compressor, the outdoor heat exchanger, the electric control box and the indoor heat exchanger are connected in sequence.

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