Heating, ventilation and air conditioning system, and electric control box therefor

Abstract

Embodiments of the present application provide a heating, ventilation and air conditioning system, and an electric control box therefor. The electric control box comprises a box body, an isolation cover, and a terminal block; an inner cavity and a mounting port communicated with the inner cavity are formed in the box body; the isolation cover is provided in the inner cavity and covers the mounting port; a mounting cavity is formed in the isolation cover; the mounting cavity is isolated from an interval outside the isolation cover and located in the inner cavity; and at least part of the terminal block is located in the mounting cavity.

Description

HVAC system and its electric control box

[0001] The present application claims priority to the Chinese patent application No. 202411255388X, filed on September 6, 2024, entitled “HVAC system and its electric control box”, and the Chinese patent application No. 2024222001960, filed on September 6, 2024, entitled “HVAC system and its electric control box”, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the air conditioning technical field, and in particular to an HVAC system and its electric control box. BACKGROUND

[0003] In the related art, the electrical components in the electric control box need to be wired to the outside world, so a hole needs to be opened on the side wall of the electric control box, which will cause some dust to enter the electric control box through the hole, thereby possibly affecting the normal operation of the internal electrical components. SUMMARY

[0004] The present application provides an HVAC system and its electric control box, the installation cavity formed by the shield is isolated from the area outside the shield and located in the inner cavity, which can make it difficult for dust and other impurities to enter the area outside the shield and located in the inner cavity, thereby improving the normal operation environment of the internal electrical components.

[0005] In a first aspect, the present application provides an electric control box for an HVAC system, comprising:

[0006] a box body, forming an inner cavity and a mounting port in communication with the inner cavity;

[0007] a shield, disposed in the inner cavity and covering the mounting port, the shield forming an installation cavity, the installation cavity being isolated from the area outside the shield and located in the inner cavity; and

[0008] a wiring seat, at least partially located in the installation cavity.

[0009] Based on the electric control box provided by the present application, the box body forms an inner cavity, the shield is at least partially located in the inner cavity, and the installation cavity formed by the shield is isolated from the area outside the shield and located in the inner cavity. In this way, dust and other impurities from the outside world are difficult to enter the area outside the shield and located in the inner cavity, thereby improving the normal operation environment of the internal electrical components.

[0010] In some embodiments, the wiring seat is provided with a first wiring part and a second wiring part, and the second wiring part is electrically connected to the first wiring part.

[0011] In some embodiments, the second wiring part is separated from the first wiring part by the shield.

[0012] In some embodiments, the second wiring portion and the first wiring portion are both located in the installation cavity, the cover has a wire hole, and the wire hole has a sealing element.

[0013] In some embodiments, the cover includes a base, the wiring seat is fixed relative to the base, and the base has a wire port.

[0014] In some embodiments, the cover includes a cover plate, the cover plate 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 the installation cavity, and the installation cavity is connected to the wire port; in the second position, the cover plate exposes at least part of the wiring seat.

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

[0016] The baffle is fixed relative to the base, and when the cover plate is in the first position, the baffle and the cover plate are located on the same side of the base.

[0017] In some embodiments, the baffle is located on the side where the wire port is located, a wire cavity is formed between the baffle and the base and communicates with the installation cavity, and the wire cavity forms an opening on the side away from the wire port.

[0018] In some embodiments, the cover further includes:

[0019] The baffle is fixed relative to the base, and when the cover plate is in the first position, the baffle and the cover plate are located on the same side of the base.

[0020] In some embodiments, the baffle forms a clamping groove on the side away from the wire cavity, and when the cover plate is in the first position, the clamping plate is at least partially located in the clamping groove and abuts the inner wall of the clamping groove.

[0021] In some embodiments, the clamping groove extends to the end face of the baffle away from the opening.

[0022] In some embodiments, when the cover plate is in the first position, the cover plate abuts the end face of the baffle away from the opening.

[0023] In some embodiments, the cover plate and the base are rotatably connected on one side of the base.

[0024] In some embodiments, the cover plate and the base are detachably connected on the other side of the base.

[0025] In some embodiments, the cover further includes:

[0026] The partition plate 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 plate has a first vent hole and a second vent hole arranged at intervals, and the first vent hole and the second vent hole both communicate with the first chamber and the second chamber.

[0027] In some embodiments, the electronic device is further included, and the electronic device is disposed in the first chamber.

[0028] In some embodiments, the heat sink is further included, and at least a part of the heat sink is disposed in the second chamber.

[0029] In some embodiments, the heat dissipation fan is further included, and the heat dissipation fan is disposed in one of the first chamber and the second chamber, and is configured to circulate air flow between the first chamber and the second chamber.

[0030] In some embodiments, the mounting port is in communication with the first chamber, and the partition cover is located in the first chamber.

[0031] In some embodiments, the partition cover is located at a side of the first chamber.

[0032] In some embodiments, the heat dissipation fan and the electronic device are both located in the first chamber.

[0033] In some embodiments, the heat dissipation fan includes a first heat dissipation fan and a second heat dissipation fan, the first heat dissipation fan is disposed at one side of the first chamber along a first direction, the second heat dissipation fan is disposed at the other side of the first chamber along the first direction, and the electronic device is disposed between the first heat dissipation fan and the second heat dissipation fan.

[0034] In some embodiments, the partition cover is disposed at the side of the first heat dissipation fan away from the second heat dissipation fan along the first direction, or the partition cover is disposed at the side of the second heat dissipation fan away from the first heat dissipation fan along the first direction.

[0035] In some embodiments, the heat sink includes a heat exchange main body and a heat dissipation portion fixed relative to the heat exchange main body, and the heat exchange main body is located in the second chamber.

[0036] In some embodiments, the partition plate is provided with a heat exchange port in communication with the first chamber and the second chamber.

[0037] In some embodiments, the heat dissipation portion is disposed adjacent to the heat exchange port.

[0038] In a second aspect, the embodiments of the present application provide a heating and ventilation system, which comprises:

[0039] The electric control box of any one of the first aspect;

[0040] The compressor;

[0041] The outdoor heat exchanger; and

[0042] The indoor heat exchanger, the compressor, the outdoor heat exchanger, the electric control box and the indoor heat exchanger are sequentially in communication. BRIEF DESCRIPTION OF DRAWINGS

[0043] Fig. 1 is a structural schematic diagram of a heating system according to an embodiment of the present application;

[0044] Fig. 2 is a structural schematic diagram of the inside of an electric control box according to an embodiment of the present application;

[0045] Fig. 3 is a structural schematic diagram of the structure shown in Fig. 2 from another perspective according to an embodiment of the present application;

[0046] Fig. 4 is a structural schematic diagram of the inside of an electric control box according to an embodiment of the present application (the arrow indicates the direction of the wind);

[0047] Fig. 5 is a structural schematic diagram of the structure shown in Fig. 2 from another perspective according to an embodiment of the present application;

[0048] Fig. 6 is an exploded structural schematic diagram of an electric control box according to an embodiment of the present application;

[0049] Fig. 7 is a structural schematic diagram of the structure shown in Fig. 6 from another perspective according to an embodiment of the present application;

[0050] Fig. 8 is a structural schematic diagram of a partition plate in the structure shown in Fig. 6 according to an embodiment of the present application;

[0051] Fig. 9 is a structural schematic diagram of a heat exchange main body according to an embodiment of the present application;

[0052] Fig. 10 is a structural schematic diagram of a cover plate in a second position according to an embodiment of the present application;

[0053] Fig. 11 is a structural schematic diagram of a cover plate in a first position according to an embodiment of the present application;

[0054] Fig. 12 is a structural schematic diagram of the structure shown in Fig. 10 from another perspective according to an embodiment of the present application;

[0055] Fig. 13 is a structural schematic diagram of a cover plate in a second position according to another embodiment of the present application;

[0056] Fig. 14 is a structural schematic diagram of a cover plate in a first position according to another embodiment of the present application;

[0057] Fig. 15 is a structural schematic diagram of an electric control box according to an embodiment of the present application;

[0058] Fig. 16 is an enlarged structural schematic diagram of part A in Fig. 15 according to an embodiment of the present application.

[0059] Explanation of reference signs: 1000, heating and ventilation system; 1000a, first heat exchange flow path; 1000b, second heat exchange flow path; 100, electric control box; 10, box body; 10a, inner cavity; 11a, first chamber; 11b, second chamber; 10b, mounting port; 10c, drainage port; 20, cover; 20a, mounting cavity; 20b, wire passing port; 20c, wire passing cavity; 20d, opening; 21, base; 22, cover plate; 23, baffle; 23a, lapping groove; 24, lapping plate; 30, wiring seat; 31, first wiring part; 32, second wiring part; 40, partition plate; 40a, first ventilation port; 40b, second ventilation port; 40c, heat exchange port; 50, electronic device; 51, first electronic device; 52, second electronic device; 60, heat sink; 61, heat exchange main body; 611, first heat exchange pipeline; 612, second heat exchange pipeline; 613, main path inlet pipe; 614, main path outlet pipe; 615, auxiliary path inlet pipe; 616, auxiliary path outlet pipe; 62, heat dissipation part; 70, heat dissipation fan; 71, first heat dissipation fan; 72, second heat dissipation fan; 80, plug body; 80a, wire passing channel; 90, flow guide plate; 200, outdoor heat exchanger; 300, indoor heat exchanger; 400, compressor; 500, first expansion valve; 600, second expansion valve; 700, gas-liquid separator; 800, four-way valve; XX, first direction; YY, second direction; ZZ, third direction.

[0060] The purposes, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0061] In order to make the purposes, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application with reference to the accompanying drawings.

[0062] The following description relates to the accompanying drawings, unless otherwise indicated, the same reference signs in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0063] In the description of the present application, it is understood that the terms "first", "second" and the like are used to set the description purpose only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, "a plurality of" means two or more, unless otherwise specified. The association relationship of the associated objects is described, which means that there can be three kinds of relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after it.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more associated listed items.

[0065] The embodiments of the present application provide a heating and ventilation system 1000, which includes air conditioners, multi-split air conditioners, heat pumps and the like configured as heating or refrigeration systems. The heating or refrigeration system can heat a heat exchange medium, which can be water, ethylene glycol or other heat exchange medium. The source of water can be municipal water or drinking water. In the embodiments, the heat exchange medium in the heating and ventilation system 1000 is taken as an example to be municipal water.

[0066] The heating and ventilation system 1000 generally includes a heating and ventilation device, which refers to a device that can be configured to adjust the temperature of air or water. For example, the heating and ventilation device can include, but is not limited to, an air conditioner, a heat pump, a multi-split air conditioner, a pool machine or a water heater, etc. The heating and ventilation device generally includes a water circuit assembly and a refrigerant assembly. The water circuit assembly is configured to transport water. The refrigerant assembly is configured to transport refrigerant, wherein the refrigerant assembly includes a refrigerant pipeline that transports refrigerant. Generally, the refrigerant assembly in the heating and ventilation device 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, so as to heat the water in the water circuit assembly by using the phase change of the refrigerant in the refrigerant flow path.

[0067] Referring to FIG. 1, the heating and ventilation 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 heating and ventilation system 1000 has a first heat exchange flow path 1000a and a second heat exchange flow path 1000b, and the heating and ventilation system 1000 has a refrigeration mode and a heating mode.

[0068] In the cooling mode, the path of the refrigerant flow is:

[0069] Compressor 400-outdoor heat exchanger 200-electronic control box 100-outdoor heat exchanger 200-indoor heat exchanger 300-compressor 400.

[0070] In the cooling mode, the first heat exchange flow path 1000a and the second heat exchange flow path 1000b both exist refrigerant, wherein the path of the refrigerant flow on the first heat exchange flow path 1000a is: compressor 400-outdoor heat exchanger 200-electronic control box 100-first expansion valve 500-indoor heat exchanger 300-compressor 400;

[0071] 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;

[0072] Wherein 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, therefore, as shown in FIG. 1, a gas-liquid separator 700 is further arranged between the second expansion valve 600 and the compressor 400 on the second heat exchange flow path 1000b to filter the liquid refrigerant.

[0073] 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;

[0074] 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;

[0075] It should be noted that the heating and cooling system 1000 can further include a four-way valve 800, the four-way valve 800 is configured to switch the forward and reverse flow directions of the refrigerant to realize the switching of the cooling mode and the heating mode of the heating and cooling system 1000, and the embodiment of the present application will be exemplarily described with the heating and cooling system 1000 in the cooling mode.

[0076] For example, in the cooling mode of the heating and cooling system 1000 shown in FIG. 1, when the refrigerant passes through the outdoor heat exchanger 200 into the electronic control box 100, the refrigerant is a medium-pressure 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.

[0077] In addition, the first heat exchange flow path 1000a and the second heat exchange flow path 1000b are arranged adjacently, so that the second refrigerant absorbs heat from the first refrigerant flowing on the first heat exchange flow path 1000a during the flow of the second refrigerant along the second heat exchange flow path 1000b, and is further vaporized to further supercool the first refrigerant, thereby improving the refrigeration efficiency.

[0078] It is worth noting that the "first" and "second" of the first heat exchange flow path 1000a and the second heat exchange flow path 1000b and the first refrigerant and the second refrigerant flow are only configured to distinguish different heat exchange flow paths and refrigerants, and should not be considered as limiting the specific application of the heat exchange flow path and the refrigerant. For example, in other embodiments or working modes, the first refrigerant flowing through the first heat exchange flow path 1000a can absorb heat from the second refrigerant of 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.

[0079] Referring to FIGS. 2-3, an electric control box 100 is usually provided in the heating and ventilation device to control the waterway assembly through the electric control box 100. The electric control box 100 includes a box body 10, a cover 20, and a wiring seat 30.

[0080] 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, which are connected together by screws or buckles, etc. between adjacent ones. The plurality of side shells are enclosed and form an inner cavity 10a, which can accommodate some electrical components. An installation opening 10b is formed on one of the side shells, which is generally the lower side shell. The installation opening 10b allows the electrical wires to pass through to electrically connect the external power supply device to the electrical components in the inner cavity 10a.

[0081] Referring to FIGS. 3-4, the box body 10 can be a rectangular box body, of course, the shape of the box body 10 is not limited to the above-mentioned rectangular shape, 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, any suitable surface can be selected for fixation when assembling the electric control box.

[0082] The cover 20 is arranged in the inner cavity 10a and covers the installation opening 10b. The cover 20 forms an installation cavity 20a, which is isolated from the outside of the cover 20 and located in the inner cavity 10a.

[0083] The wiring seat 30 is at least partially located in the installation cavity 20a. The main function of the wiring seat 30 is to connect the wires, which allows the electrical wires of the external power supply device to be connected to the electrical wires of the electronic components in the inner cavity 10a. Specifically, the electrical wires of the external power supply device enter the installation cavity 20a through the installation opening 10b and are connected to the corresponding wire terminals on the wiring seat 30.

[0084] In the embodiment, since the external wire is only electrically connected with the terminal 30 in the installation cavity 20a, and the installation cavity 20a is isolated from the outer part of the cover 20 and the inner cavity 10a, thus, the external dust and impurities are difficult to enter the part of the cover 20 outside and the inner cavity 10a through the connection between the external wire and the terminal 30, so as to avoid the circuit short circuit caused by the accumulation of dust and impurities, and further improve the normal operation environment of the internal electrical components.

[0085] Referring to FIGS. 1-2, the embodiment of the application is through the cover 20 located in the inner cavity 10a, the whole electric control box 100 looks neat and tidy from the outside, and is convenient for the modular design of the whole electric control box 100, in addition, the cover 20 located in the inner cavity 10a can also reduce the interference and damage of the external environment to the terminal 30 located in the installation cavity 20a.

[0086] In the electric control box 100, referring to FIGS. 5-6, the electric control box 100 further comprises a partition plate 40, an electronic device 50 (also referred to as an electrical component), a heat sink 60 and a cooling fan 70.

[0087] The partition plate 40 is arranged in 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 plate 40 is provided with a first air vent 40a and a second air vent 40b arranged at intervals, and the first air vent 40a and the second air vent 40b are both connected with the first chamber 11a and the second chamber 11b. The partition plate 40 can be fixed on the box body 10 by screws or welding, and the air exchange between the first chamber 11a and the second chamber 11b is realized through the first air vent 40a and the second air vent 40b. One of them is a low-temperature chamber, and the other is a high-temperature chamber. At least part of the heat sink 60 (not shown in the figure) is arranged in the low-temperature chamber, and the electronic device 50 generating heat during operation is arranged in the high-temperature chamber.

[0088] The electronic device 50 is arranged in the first chamber 11a, and the chamber where the electronic device 50 is arranged is the high-temperature chamber, and the second chamber 11b is the low-temperature chamber.

[0089] The cooling fan 70 is arranged in one of the first chamber 11a and the second chamber 11b, and is configured to make the air flow circulate between the first chamber 11a and the second chamber 11b. The number of the cooling fan 70 can be set to be multiple, and can be distributed according to the position of the electronic device 50, so that the circulating air flow passes through the electronic device 50 more.

[0090] Through the flow guiding effect of the cooling fan 70, the air flow circulates between the first chamber 11a and the second chamber 11b, so as to cool the electronic device 50.

[0091] Further, in the embodiment, referring to FIG. 6, the first air vent 40a is arranged at the upper end of the second air vent 40b, so that the air in the first chamber 11a is heated by the electronic device 50, the heat fan 70 sends the hot air into the second air vent 40b, and the hot air naturally rises to contact the radiator 60 arranged in the second chamber 11b due to the small density of the hot air, the radiator 60 is configured to cool the hot air to form cold air, the cold air flows into the first chamber 11a from the first air vent 40a, and the heat fan 70 is configured to accelerate the cold air to cool the electronic device 50 arranged in the first chamber 11a by using the cold air, the temperature of the cold air after heat exchange with the electronic device 50 is increased, and the cold air after the temperature is increased continues to enter the second air vent 40b under the action of the heat fan 70, so as to circulate and cool the electronic device 50 arranged in the inner cavity 10a in the form of internal circulation, and no negative pressure difference is generated with the external environment to suck the impurities such as dust and iron filings in the external environment into the first chamber 11a and the second chamber 11b.

[0092] Preferably, the heat fan 70 is arranged in the first chamber 11a, which can accelerate the flow speed of the air in the first chamber 11a, and further accelerate the circulation speed of the air between the first chamber 11a and the second chamber 11b, thereby improving the heat dissipation efficiency of the electronic device 50.

[0093] Further, referring to FIG. 6, the heat fan 70 can be arranged at a position close to the first air vent 40a, so as to make the cold air at the top of the first chamber 11a enter the second chamber 11b in time, and the heat fan 70 can accelerate the cold air to improve the heat dissipation efficiency of the electronic device 50.

[0094] A wind guide cover (not shown in the figure) can also be arranged in the first chamber 11a, the wind guide cover covers the heat fan 70 and is configured to guide the air blown by the heat fan 70, so that the air outlet direction of the heat fan 70 is towards the electronic device 50.

[0095] In order to facilitate the wiring of the wiring seat 30 and the electronic device 50 in the inner cavity 10a and prevent the interference and damage of the external environment to the wiring seat 30, the wiring seat 30 and the cover 40 are both arranged in the inner cavity 10a.

[0096] It should be understood that, in the embodiment, referring to FIGS. 6 and 7, the radiator 60 includes a heat exchange main body 61, and the refrigerant flowing through the heat exchange main body 61 can exchange heat with the heat generated by the electronic device 50, wherein the heat exchange main body 61 is arranged in the second chamber 11b, and the second chamber 11b can provide sufficient space for the heat exchange main body 61 to distribute.

[0097] In the embodiment, the refrigerant flowing through the heating and ventilation system 100 exchanges heat with the airflow inside the electric control box 100, and the electric control box 100 does not need to be provided with a heat dissipation hole, and the airflow inside the electric control box 100 can be cooled.

[0098] Further, referring to FIGS. 6-7, the heat exchange main body 61 includes a first heat exchange pipeline 611, a second heat exchange pipeline 612, a main path inlet pipeline 613, a main path outlet pipeline 614, an auxiliary path inlet pipeline 615, and an auxiliary path outlet pipeline 616. The main path inlet pipeline 613, the first heat exchange pipeline 611, and the main path outlet pipeline 614 are located on the first heat exchange flow path 1000a. In the refrigeration mode, the first refrigerant flows through the main path inlet pipeline 613, the first heat exchange pipeline 611, and the main path outlet pipeline 614 in sequence, and the second refrigerant flows through the auxiliary path inlet pipeline 615, the second heat exchange pipeline 612, and the auxiliary path outlet pipeline 616 in sequence.

[0099] To increase the heat exchange efficiency of the first refrigerant and the second refrigerant, the first heat exchange pipeline 611 and the second heat exchange pipeline 612 are both provided with a plurality of pipelines. The main path inlet pipeline 613, the main path outlet pipeline 614, the auxiliary path inlet pipeline 615, and the auxiliary path outlet pipeline 616 also function as flow collectors. Referring to the orientation shown in FIG. 9, along the second direction YY, i.e., the front-rear direction, the first heat exchange pipeline 611 and the second heat exchange pipeline 612 are staggered. In the embodiment, the first heat exchange pipeline 611 is provided with the second heat exchange pipeline 612 on both sides.

[0100] Considering the miniaturization design of the entire electric control box 100, the first heat exchange pipeline 611 and the second heat exchange pipeline 612 extend along the first direction XX, and the main path inlet pipeline 613, the main path outlet pipeline 614, the auxiliary path inlet pipeline 615, and the auxiliary path outlet pipeline 616 are all arranged at the two ends of the first heat exchange pipeline 611 and the second heat exchange pipeline 612 along the first direction XX. The main path inlet pipeline 613 and the auxiliary path outlet pipeline 616 are located upstream of the first heat exchange pipeline 611, and the main path outlet pipeline 614 and the auxiliary path inlet pipeline 615 are located downstream of the first heat exchange pipeline 611. In this way, the internal space of the electric control box 100 can be reasonably utilized, the internal structure is compactly distributed, and the miniaturization design of the electric control box 100 is facilitated.

[0101] In some embodiments, to reduce the overall length of the heat exchange main body 61, the first heat exchange pipeline 611 and the second heat exchange pipeline 612 can be bent toward the second direction YY at the two ends along the first direction XX. The overall length of the heat exchange main body 61 can be reduced under the condition that the heat exchange main body 61 has a sufficient extension length, and the length of the electric control box 100 along the first direction XX matched with the heat sink 60 can be reduced, so as to reduce the volume of the electric control box 100.

[0102] Further, in order to improve the heat exchange efficiency, the heat sink 60 comprises 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 fixed on the heat exchange main body 61, and in order to improve the heat exchange efficiency of the heat exchange main body 61 and the heat dissipation part 62, the heat dissipation part 62 is designed to be attached to the heat exchange main body 61, which can further improve the heat exchange efficiency.

[0103] Please continue to refer to FIGS. 6-7, the partition plate 40 is provided with a heat exchange opening 40c communicating the first chamber 11a and the second chamber 11b, and the heat dissipation part 62 is arranged adjacent to the heat exchange opening 40c, so that the heat dissipation part 62 can exchange heat with the gas in the first chamber 11a more quickly, that is, the electronic device 50 can be quickly cooled.

[0104] In some embodiments, the heat dissipation part 62 is a plate structure, and the heat dissipation part 62 is attached to the main surface of the heat exchange main body 61 to increase the contact area of the heat dissipation part 62 and the heat exchange main body 61, thereby improving the heat conduction efficiency.

[0105] On the basis of the plate structure of the heat dissipation part 62, the heat dissipation part 62 can be made of a metal plate or an alloy plate with good heat conductivity, 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.

[0106] In other embodiments, the heat dissipation part 62 is a heat dissipation fin, which can be connected to the surface of the heat exchange main body 61 by welding, bonding or fastening. By arranging a small number of heat dissipation fins with large surface area, on the one hand, the heat dissipation fins can be easily connected 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, the contact area between the heat dissipation fins and the air can be increased, and the heat exchange effect can be enhanced.

[0107] It can be understood that when the heat dissipation part 62 is arranged adjacent to the heat exchange opening 40c, the electronic device 50 in the first chamber 11a is also arranged adjacent to the heat exchange opening 40c, so that the heat exchange efficiency can be greatly improved.

[0108] The flow of the refrigerant makes the temperature of the heat dissipation part 62 lower, and the electronic device 50 in the electric control box 100 generates heat, making the temperature in the inner cavity of the electric control box 100 higher. When the air with high temperature in the electric control box 100 contacts the heat dissipation part 62, it is easy to condense, and then form condensed water 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 short circuit or damage of the electronic device 50, and more seriously, fire hazard.

[0109] 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 shown in FIGS. 6-7, 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, and 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. During the flow of the second refrigerant, the first heat exchange flow path 1000a can be heat-absorbed, so the temperature of the first heat exchange flow path 1000a gradually decreases 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 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.

[0110] 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 high temperatures and are on the same side, the temperature on this side is high, and the temperature difference between the hot air and the side is small, so that no condensate water is generated or the amount of condensate water generated is small. By arranging the electronic device 50 near the upstream end of the first heat exchange flow path 1000a, the probability of the electronic device 50 contacting the condensate water can be reduced, thereby protecting the electronic device 50.

[0111] In addition, due to the presence of the partition plate 40, the electronic device 50 is located in the first chamber 11a, and the heat exchange body 61 is located in the second chamber 11b. In this way, even if condensate water exists on the heat exchange body 61, it is difficult for the condensate water to enter the first chamber 11a, thereby ensuring the normal operating environment of the electronic device 50.

[0112] Further, if a large amount of condensate water is generated on the heat exchange body 61, in order to avoid the possibility of the condensate water corroding the shell of the electronic control box 100, in the embodiment of the present application, as shown in FIG. 8, a flow guide plate 90 can be arranged in the electronic control box 100. Specifically, the flow guide plate 90 is arranged in the second chamber 11b and is arranged on the lower side of the heat exchange body 61 along the direction of gravity and is configured to collect the condensate water dripping from the heat exchange body 61. The arrangement of the flow guide plate 90 not only reduces the height of the condensate water dripping, thereby reducing the noise, but also has a certain accumulation effect on the condensate water, which facilitates the flow of the condensate water out of the electronic control box 100,

[0113] Further, in order to facilitate the timely discharge of the condensed water on the flow guide plate 90 from the electric control box 100, a drain port 10c can be formed on the bottom wall of the box body, as shown in FIG. 8, and the flow guide plate 90 is inclined relative to the bottom wall of the electric control box 100. The condensed water is guided by the flow guide plate 90 and discharged from the electric control box 100 through the drain port 10c.

[0114] Since the heat generated by the electronic device 50 is large, it is difficult to exchange heat with all the gas through the heat dissipation part 62. Therefore, in order to quickly remove the heat of the electronic device 50, please refer to FIG. 6, based on the electronic device 50 being located in the first chamber 11a, the heat dissipation fan 70 is located in the first chamber 11a. In this way, the heat dissipation 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.

[0115] More specifically, the heat dissipation fan 70 includes a first heat dissipation fan 71 and a second heat dissipation fan 72. The first heat dissipation fan 71 is arranged on one side of the first chamber 11a along the first direction XX, and the second heat dissipation 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 heat dissipation fan 71 and the second heat dissipation fan 72.

[0116] As shown in FIG. 6, the electronic device 50 has multiple types, wherein a plurality of electronic devices 50 are mounted 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 outflow side of the first heat dissipation fan 71 faces the first electronic device 51, and the outflow side of the second heat dissipation fan 72 faces the second electronic device 52. Along the third direction ZZ, the first heat dissipation fan 71 is located at the upper end of the second heat dissipation fan 72. The first direction XX, the second direction YY, and the third direction ZZ are perpendicular to each other.

[0117] Therefore, after the first heat dissipation fan 71 blows cold air to the first electronic device 51, the second heat dissipation fan 72 blows the cold air to the second electronic device 52. In this way, the air flow is circulated in the first chamber 11a and the second chamber 11b through the first heat dissipation fan 71 and the second heat dissipation fan 72, thereby improving the cooling speed of the electronic device 50.

[0118] Referring to FIGS. 2-4, further, the shroud 20 is located at the side of the first chamber 11a, which can be located at the side of the first heat dissipation fan 71 away from the second heat dissipation fan 72 along the first direction XX, or can be located at the side of the second heat dissipation fan 72 away from the first heat dissipation fan 71 along the first direction XX, in this way, the presence of the shroud 20 will not block the flow of circulating airflow, and will not affect the heat dissipation of the electronic device 50. In order to make the overall structure of the shroud 20 more compact, and in order to make the remaining space of the first chamber 11a larger, so as to accommodate more electronic devices 50 or reserve more space to provide convenience for future expansion or maintenance, referring to the position shown in FIG. 3, the shroud 20 is located at the lower left corner of the first chamber 11a.

[0119] In addition, based on the position of the shroud 20 at the lower left corner of the first chamber 11a, the terminal block can be closer to the mounting port, which facilitates the connection of the terminal block with external wiring. On the other hand, the shroud 20 is arranged staggered with the electronic device 50, which also makes the internal structure of the electric control box compact, facilitating the miniaturization design of the electric control box.

[0120] In the present embodiment, referring to FIGS. 10-11, the terminal block 30 in the electric control box 100 is provided with a first terminal part 31 and a second terminal part 32, the second terminal part 32 is electrically connected with the first terminal part 31, the first terminal part 31 is electrically connected with the power supply device located outside the electric control box 100 through wires, and the second terminal part 32 is electrically connected with the electronic device 50 in the inner cavity 10a of the electric control box 100 through wires, in this way, the power transmission between the power supply devices inside and outside the electric control box 100 can be realized.

[0121] In an embodiment, referring to FIGS. 9-10, the second terminal part 32 is separated from the first terminal part 31 by the shroud 20, that is, the second terminal part 32 is located outside the mounting cavity 20a, while the first terminal part 31 is located inside the mounting cavity 20a, the shroud 20 does not cover the second terminal part 32, and only needs to cover the first terminal part 31, in this way, for the terminal block 100, the space occupied by the entire first terminal part 31 is smaller, and the shroud 20 only needs to cover the first terminal part 31, thus reducing the manufacturing cost.

[0122] In another embodiment, referring to FIGS. 12-14, the second terminal part 32 and the first terminal part 31 are both located inside the mounting cavity 20a, and the shroud 20 is provided with a wire hole (not shown in the figure), and the wire hole is provided with a sealing element (not shown in the figure). Since the first terminal part 31 and the second terminal part 32 are not separated by the shroud 20, the manufacturing process of the entire terminal block 100 is simplified, and the overall manufacturing process difficulty is reduced.

[0123] In order to avoid the dust from the outside entering into the inner cavity 10a through the threading hole, a sealing member is arranged in the threading hole. The sealing member can be a rubber dustproof plug or a silica gel dustproof plug, or a sealing ring with elasticity. The rubber dustproof plug and the sealing ring can be arranged in the threading hole by embedding, or fixed in the threading hole by glue.

[0124] For example, the sealing member in the embodiment is a rubber dustproof plug. An internal passage is formed in the rubber dustproof plug for the wire to pass through. When the rubber dustproof plug is not pressed, the cross-sectional area of the internal passage is larger than the cross-sectional area of the wire. When the wire passes through the internal passage of the rubber dustproof plug, the inner wall of the rubber dustproof plug can tightly adhere to the wire under the elastic effect, and the outer wall of the rubber dustproof plug can also adhere to the inner wall of the threading hole. In this way, the sealing effect of the sealing member can be guaranteed to the greatest extent, so that the dust is prevented from entering into the inner cavity 10a through the threading hole.

[0125] It should be understood that, in order to prevent the entire wiring seat 30 from being disturbed and damaged by the external environment, the entire wiring seat 30 is located in the inner cavity 10a. In the embodiment, 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 located in the mounting cavity 20a, while the second wiring part 32 is located outside the mounting cavity 20a.

[0126] In the embodiment, referring to FIGS. 11-12, the cover 20 includes a base 21 and a cover plate 22.

[0127] The base 21 can be fixed on the box body 10 by screws, bolts or buckles, and the wiring seat 30 can be fixed and connected by screws, bolts or buckles, or integrally injection molded. In the embodiment, 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. In addition, the integrally injection molded wiring seat 30 has a neat and beautiful appearance without extra screws, bolts or buckles, which improves the overall appearance. At the same time, the neat appearance is also conducive 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 moisture, dust and other external factors, and protect the normal operation of the internal electrical components.

[0128] 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 facilitates the assembly of the electric control box 100.

[0129] The base is formed with a wire passing port, the cover plate 22 is movably connected with 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 with the base 21 and encloses to form the mounting cavity 20a, the mounting cavity 20a is communicated with the wire passing port 20b; in the second position, the cover plate 22 exposes at least part of the terminal seat 30.

[0130] When the cover plate 22 is in the first position, the cover plate 22 provides good protection for the terminal seat 30 through the cooperation of the cover plate 22 and the base 21, which can protect the terminal seat 30 and prevent dust and the like, the design of the wire passing port 20b enables the wires to enter the mounting cavity 20a orderly and be connected with the terminal seat 30, avoiding the disorder and entanglement of the wires and improving the overall appearance of the electric control box 100; when the cover plate 22 is in the second position, the mounting cavity 20a is exposed, which facilitates the user to wire and maintain the terminal seat 30.

[0131] In combination with FIGS. 10-11, the cover plate 22 further comprises a baffle 23, the baffle 23 is fixed relative to the base 21, the baffle 23 can be fixedly connected on the base 21 by screws, bolts or buckles, or can be integrally injection molded with the base 21, in the embodiment, in order to ensure the strength of the structure, the integrally injection molded connection mode is preferably adopted.

[0132] When the cover plate 22 is in the first position, the baffle 23 is located on the same side of the cover plate 22 and the base 21, and the baffle 23 is located on the side where the wire passing port 20b is located, the baffle 23 and the base 21 form a wire passing cavity 20c communicated with the mounting cavity 20a, the wire passing cavity 20c forms an opening 20d on the side away from the wire passing port 20b.

[0133] The wires connected with external electrical elements can be sequentially threaded through the opening 20d, the wire passing cavity 20c and the wire passing port 20b, and finally enter the mounting cavity 20a to be connected with the terminal seat 30, since the baffle 23 is fixed relative to the base 21, when the cover plate 22 is opened, the wires are still orderly threaded through the wire passing cavity 20c and extended into the mounting cavity 20a, which not only improves the neatness of the electric control box 100, but also helps to improve the maintenance efficiency and safety of the electric control box 100.

[0134] When the cover 20 is arranged inside the inner cavity 10a, in order to make the overall structure of the cover 20 more compact, and also to make the remaining space of the inner cavity 10a larger to accommodate more electrical components or to reserve more space to provide convenience for future possible expansion or maintenance, the cover 20 is generally arranged on the lower side shell of the electrical control box 100, and the mounting opening 10b is also arranged on the lower side shell, so that the opening 20d faces downward and is arranged opposite to the mounting opening 10b, and the side of the baffle 23 close to the opening 20d is attached to the inner wall of the lower side shell of the electrical control box 100. In this way, with the blocking of the baffle 23, when the cover plate 22 is moved, the cover plate 22 is effectively prevented from directly contacting the lower side shell of the box body 10, thereby avoiding possible friction and wear. This not only prolongs the service life of the electrical control box 100, but also improves the overall stability and reliability.

[0135] In another aspect, the base 21 and the baffle 23 are attached to the lower side shell of the electrical control box 100, and the mounting opening 10b is also arranged on the lower side shell,

[0136] The wires are more direct and convenient when entering and exiting the terminal box 100, reducing the space occupied by the wires in the inner cavity 10a, which not only reduces the manufacturing cost, but also facilitates the arrangement and management of the wires.

[0137] 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 electrical control box 100 to prevent external dust and other substances from entering the inner cavity 10a, and the space outside the terminal box 100 can effectively avoid the influence of external dust and other substances on the electrical components in the inner cavity 10a.

[0138] Further, in order to reduce the influence of dust, water droplets and other impurities entering the mounting cavity 20a on the terminal block 30, a plug 80 is arranged at the opening 20a, as shown in FIGS. 15-16. The plug 80 forms a wire passage 80a inside, which communicates with the mounting cavity 20a, i.e., with the wire passage 100c and the mounting cavity 20a. The arrangement of the wire passage 80a prolongs the path of dust, water droplets and other impurities entering the wire passage 20c and the mounting cavity 20a, thereby reducing the possibility of dust, water droplets and other impurities entering the wire passage 20c and the mounting cavity 20a to some extent, and ensuring the stability of the wire connection of the terminal block 30.

[0139] The plug 80 can be installed at the opening 20d by buckling, screwing or gluing, etc. The specific arrangement is determined according to the material and actual situation of the plug 80, which is not limited here.

[0140] As mentioned above, please continue to refer to Figures 10-11, when the cover 22 needs to be moved to facilitate wiring or maintenance of the terminal block 30, in order to avoid dust entering the space outside the cover 20 in the inner cavity 10a through the cover 22 and the baffle 23, when the cover 22 is in the first position, attention should be paid to the sealing between the cover 22 and the baffle 23, therefore, in this embodiment, the cover 20 further comprises a lap plate 24, the lap plate 24 is fixed relative to the cover 22, when the cover 22 is in the first position, the lap plate 24 is arranged on the baffle 23, when the cover 22 is in the second position, the lap plate 24 is separated from the baffle 23.

[0141] When the cover 22 is closed (i.e. in the first position), the lap plate 24 will be arranged on the baffle 23, forming a tight contact surface. This design can effectively prevent dust, moisture or other contaminants from entering the inner cavity 10a through the gap between the cover 22 and the baffle 23, thereby protecting the normal use of the internal electrical components.

[0142] It can be understood that the lap plate 24 and the cover 22 can be fixedly connected by screws, bolts or buckles, or can be integrally injection molded, in this embodiment, in order to consider the sealing and structural strength, the lap plate 24 and the cover 22 are integrally injection molded.

[0143] Further, please continue to refer to Figure 9, the baffle 23 forms a lap slot 23a on the side away from the wire passing cavity 20c, when the cover 22 is in the first position, the lap plate 24 is at least partially located in the lap slot 23a and abuts the inner wall of the lap slot 23a, that is, the lap plate 24 can be partially located in the lap slot 23a and abut the inner wall of the lap slot 23a, or the lap plate 24 can be completely located in the lap slot 23a and abut the inner wall of the lap slot 23a. Both of the two embodiments can play a sealing role, but in this embodiment, in order to occupy less space in the inner cavity 10a for the entire cover 20, so as to give more installation space for the electrical components in the inner cavity 10a, therefore, the lap plate 24 is completely located in the lap slot 23a and abuts the inner wall of the lap slot 23a.

[0144] That is, the lap plate 24 is completely embedded in the lap slot 23a and tightly abuts the inner wall of the lap slot 23a, forming a nearly gapless sealing surface. This greatly enhances the sealing between the cover 22 and the baffle 23, effectively preventing dust, moisture or other contaminants from entering the inner cavity 10a, thereby ensuring the safety and stability of the internal electronic device 50.

[0145] Due to the close 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 due to factors such as vibration or impact, thereby improving the reliability and safety of the device.

[0146] In addition, although the sealing 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 is only necessary to operate according to the normal procedure, without the need for additional tools or steps to release the fit between the lapping plate 24 and the lapping groove 23a.

[0147] On the basis of the previous embodiment, please continue to refer to Figure 10, the lapping groove 23a extends to the end face of the back of the baffle 23 away from the opening 20d, so that in the slotting process, the difficulty of slotting is reduced, and the manufacturing personnel can more easily determine the start and end positions of slotting. This reduces the measurement and positioning steps required during processing, and the processing equipment can more easily cut or stamp along the predetermined path. This helps to reduce processing errors and improve the accuracy and consistency of the lapping groove 23a.

[0148] When the cover plate 22 is in the first position, the cover plate 22 is in contact with the end face of the back of the baffle 23 away from the opening 20d, and the cover plate 22 is in contact with the end face of the baffle 23, forming a tight contact surface, thereby effectively preventing dust, moisture or other contaminants from the outside from entering the inner cavity 10a through the gap between them. The structure and the close fit between the lapping plate 24 and the lapping groove 23a described above work together to greatly improve the sealing between the mounting 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), which can prevent dust, moisture or other contaminants from the outside from entering the remaining space of the inner cavity 10a through the gap between them.

[0149] Further, 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 by a hinge, so that the cover plate 22 can rotate relative to the base 21; or the cover plate 22 and the base 21 are both provided with a shaft hole, and a shaft is inserted into the 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 shaft hole, and the other is provided with a shaft, the shaft is inserted into the shaft hole, so that the cover plate 22 can rotate relative to the base 21.

[0150] The cover plate 22 can be rotated relative to the base 21 to a first position and a second position, when the cover plate 22 is rotated to the first position, the cover plate 22 covers the terminal block 30 located in the mounting cavity 20a; when the cover plate 22 is rotated to the second position, the cover plate 22 is opened to expose the terminal block 30 located in the mounting cavity 20a, so as to perform maintenance or wiring operation on the terminal block 30.

[0151] The cover plate 22 is detachably connected with the base 21 on the other side of the base 21, which can be adjacent to the side where the cover plate 22 is rotatably connected with the base 21, or can be opposite to the side, and in the embodiment, no more limitation is made.

[0152] The detachable connection mode can be that the cover plate 22 and the base 21 are respectively provided with magnetic members, and the magnetic members on the cover plate 22 and the magnetic members on the base 21 are magnetically different, when the cover plate 22 is in the first position, the two magnetic members are attracted to each other, so that the cover plate 22 and the base 21 are relatively fixed; or, the cover plate 22 and the base 21 are respectively provided with buckles, when the cover plate 22 is in the first position, the buckles on the cover plate 22 and the buckles on the base 22 can be connected by buckling, so that the cover plate 22 and the base 21 are relatively fixed. In this way, after the cover plate 22 is in the first position, the cover plate 22 is not easy to shake, which can ensure the stability of the entire cover 20, and also can prevent dust and other external substances from entering the remaining space of the inner cavity 10a from the mounting cavity 20a.

[0153] In the drawings of the embodiment, the same or similar reference numerals correspond to the same or similar parts; in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only exemplary and cannot be understood as a limitation of the present application, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0154] The above is only a preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

An electric control box for a heating, ventilation, and air conditioning system, wherein, The application relates to a box body, a cover, a wiring seat and a cover plate. The cover is arranged in the inner cavity and covers the mounting port, and the cover is provided with a mounting cavity which is isolated from the outside of the cover and the interval of the inner cavity. The wiring seat is arranged in the mounting cavity. The wiring seat is provided with a first wiring part and a second wiring part which is electrically connected with the first wiring part. The second wiring part is separated from the first wiring part through the cover, or the second wiring part and the first wiring part are both arranged in the mounting cavity, the cover is provided with a threading hole, and the threading hole is provided with a sealing element. The electric control box according to claim 1, wherein The cover comprises a base and a cover plate. The cover plate is movably connected with the base, and the cover plate has a first position and a second position. The electric control box according to claim 1 or 2, wherein, When the cover plate is in the first position, the cover plate is connected with the base and encloses the mounting cavity, and the mounting cavity is communicated with the threading hole. The cover further comprises a baffle. When the cover plate is in the first position, the baffle is located on the same side of the base as the cover plate, and the baffle is located on the side of the threading hole. The electric control box according to claim 3, wherein The baffle and the base form a threading cavity which is communicated with the mounting cavity. The cover further comprises a lapping plate. The electric control box according to claim 4, wherein When the cover plate is in the first position, the lapping plate is arranged on the baffle. When the cover plate is in the second position, the lapping plate is separated from the baffle. The electric control box according to claim 5, wherein The baffle is provided with a lapping groove on the side away from the threading cavity. The electric control box according to claim 6, wherein When the cover plate is in the first position, the lapping plate is at least partially arranged in the lapping groove and is attached to the inner wall of the lapping groove. The electric control box according to claim 6 or 7, wherein The lapping groove extends to the end surface of the baffle away from the opening. The electric control box according to any one of claims 3 to 8, wherein When the cover plate is in the first position, the cover plate is attached to the end surface of the baffle away from the opening. The electric control box according to any one of claims 1 to 9, wherein The cover plate and the base are rotatably connected on one side of the base, and are detachably connected on the other side of the base. The application further relates to a partition plate, an electronic device, a heat sink and a heat dissipation fan. The partition plate is arranged in the inner cavity of the box body and divides the inner cavity into a first chamber and a second chamber. The electronic device is arranged in the first chamber. The heat dissipation fan is arranged in one of the first chamber and the second chamber and is configured to circulate air flow between the first chamber and the second chamber. The mounting port is communicated with the first chamber, and the cover is arranged in the first chamber. The electric control box according to claim 10, wherein The cover is arranged on the side of the first chamber. The electric control box according to claim 11, wherein The heat dissipation fan and the electronic device are both arranged in the first chamber. The heat dissipation fan comprises a first heat dissipation fan and a second heat dissipation fan, the first heat dissipation fan is arranged on one side of the first chamber along a first direction, and the second heat dissipation fan is arranged on the other side of the first chamber along the first direction, and the electronic device is arranged between the first heat dissipation fan and the second heat dissipation fan. The heat dissipation fan comprises a first heat dissipation fan and a second heat dissipation fan, the first heat dissipation fan is arranged on one side of the first chamber along a first direction, and the second heat dissipation fan is arranged on the other side of the first chamber along the first direction, and the electronic device is arranged between the first heat dissipation fan and the second heat dissipation fan. The electric control box according to any one of claims 10 to 12, wherein The heat dissipation fan comprises a first heat dissipation fan and a second heat dissipation fan, the first heat dissipation fan is arranged on one side of the first chamber along a first direction, and the second heat dissipation fan is arranged on the other side of the first chamber along the first direction, and the electronic device is arranged between the first heat dissipation fan and the second heat dissipation fan. The heat dissipation fan comprises a first heat dissipation fan and a second heat dissipation fan, the first heat dissipation fan is arranged on one side of the first chamber along a first direction, and the second heat dissipation fan is arranged on the other side of the first chamber along the first direction, and the electronic device is arranged between the first heat dissipation fan and the second heat dissipation fan. The heat dissipation fan comprises a first heat dissipation fan and a second heat dissipation fan, the first heat dissipation fan is arranged on one side of the first chamber along a first direction, and the second heat dissipation fan is arranged on the other side of the first chamber along the first direction, and the electronic device is arranged between the first heat dissipation fan and the second heat dissipation fan. A heating ventilation system wherein, The heat dissipation fan comprises a first heat dissipation fan and a second heat dissipation fan, the first heat dissipation fan is arranged on one side of the first chamber along a first direction, and the second heat dissipation fan is arranged on the other side of the first chamber along the first direction, and the electronic device is arranged between the first heat dissipation fan and the second heat dissipation fan. The heat dissipation fan comprises a first heat dissipation fan and a second heat dissipation fan, the first heat dissipation fan is arranged on one side of the first chamber along a first direction, and the second heat dissipation fan is arranged on the other side of the first chamber along the first direction, and the electronic device is arranged between the first heat dissipation fan and the second heat dissipation fan. The heat dissipation fan comprises a first heat dissipation fan and a second heat dissipation fan, the first heat dissipation fan is arranged on one side of the first chamber along a first direction, and the second heat diss ​ ​ ​

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