CN112432251B

CN112432251B - Outdoor machine of air conditioner

Info

Publication number: CN112432251B
Application number: CN202011295622.3A
Authority: CN
Inventors: 胡鹏飞; 王鹏; 黄进; 杨志超
Original assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2022-07-19
Anticipated expiration: 2040-11-18
Also published as: CN112432251A

Abstract

The application discloses air condensing units, it includes: the shell is used for defining a mounting cavity; the middle partition plate is arranged in the mounting cavity and comprises a partition plate main body and a supporting part, the partition plate main body is used for dividing the mounting cavity into a first sub-mounting cavity and a second sub-mounting cavity, the first sub-mounting cavity is used for accommodating the fan, the second sub-mounting cavity is used for accommodating the compressor, and the supporting part is arranged at the top of the partition plate main body and extends towards the first sub-mounting cavity; and the electric control box is arranged on the supporting part, and the supporting part is used for supporting the electric control box. This application is through the area of contact who increases supporting part and automatically controlled box to prevent the slope of automatically controlled box, and automatically controlled box need not to fix on the fan support, and then dwindles the volume of automatically controlled box.

Description

Outdoor machine of air conditioner

Technical Field

The application relates to the field of air conditioners, in particular to an air conditioner outdoor unit.

Background

The air conditioner outdoor unit is provided with a motor support, a middle partition plate and an electric control box, the electric control box is arranged on the motor support and the middle partition plate, and the motor support and the middle partition plate are used for supporting the electric control box together. The electric control box is large in size due to the fact that the space between the motor support and the middle partition plate is large.

Disclosure of Invention

The application provides an air condensing units to solve the bulky technical problem of automatically controlled box.

In order to solve the above technical problem, the present application provides an outdoor unit of an air conditioner, which includes:

the shell is used for defining a mounting cavity;

the middle partition plate is arranged in the installation cavity and comprises a partition plate main body and a supporting part, the partition plate main body is used for dividing the installation cavity into a first sub-installation cavity and a second sub-installation cavity, the first sub-installation cavity is used for accommodating a fan, the second sub-installation cavity is used for accommodating a compressor, and the supporting part is arranged at the top of the partition plate main body and extends towards the first sub-installation cavity;

and the electric control box is arranged on the supporting part, and the supporting part is used for supporting the electric control box.

The middle partition plate comprises a partition plate main body and a supporting part, wherein the partition plate main body is used for dividing an installation cavity of a shell into a first sub-installation cavity and a second sub-installation cavity, and the supporting part is arranged at the top of the partition plate main body and extends towards the first sub-installation cavity; the electric control box is arranged on the supporting part, and the supporting part is used for supporting the electric control box. The contact area of the supporting part and the electric control box is increased to prevent the electric control box from inclining because the supporting part extends towards the first sub-mounting cavity; in addition, the electric control box does not need to be fixed on the fan bracket, and the size of the electric control box is further reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic perspective view of an air conditioner outdoor unit according to an embodiment of the present application;

fig. 2 is a schematic view illustrating an internal structure of the air conditioner outdoor unit of fig. 1;

FIG. 3 is a schematic structural view of an embodiment of a blower support according to the present application;

FIG. 4 is a schematic view of the back side of the fan mount of FIG. 3;

FIG. 5 is an enlarged top view of area A of FIG. 4;

FIG. 6 is a schematic view of the pressing wire body of FIG. 4 pressing the wire;

FIG. 7 is a schematic structural view of the middle spacer in FIG. 2;

FIG. 8 is a schematic view of a portion of the electrical control pod and the midplate of FIG. 2;

FIG. 9 is a schematic view showing the structure of the waterproof case of FIG. 2;

FIG. 10 is a schematic diagram of the electrical control box of FIG. 2;

FIG. 11 is a schematic perspective view of an embodiment of an electronic control box of the present application;

FIG. 12 is a schematic cross-sectional view of the electrical control box of FIG. 11 taken along line I-I';

FIG. 13 is a schematic view of the construction of the side panels and main panel of FIG. 11;

FIG. 14 is a schematic sectional view taken along line II-II' of FIG. 13;

FIG. 15 is a schematic structural diagram of an embodiment of a motherboard and heat sink of the present application;

Fig. 16 is a schematic view showing the construction of the power element and the radiating pipe in fig. 15;

FIG. 17 is a schematic diagram of a heat sink simulation of FIG. 15;

FIG. 18 is an exploded view of the motherboard and heat sink of FIG. 15;

FIG. 19 is a schematic structural diagram of an embodiment of a heat sink of the present application;

FIG. 20 is a schematic sectional view taken along line III-III' of FIG. 19;

FIG. 21 is a schematic structural view of another embodiment of a heat sink of the present application;

fig. 22 is a schematic structural diagram of an embodiment of a heat dissipation bracket according to the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Throughout the description of the present application, it is intended that the terms "mounted," "disposed," "connected," and "connected" be construed broadly and encompass, for example, a fixed connection, a removable connection, or an integral connection unless expressly stated or limited otherwise; can be mechanically connected or electrically connected; they may be connected directly or via an intervening media space. To one of ordinary skill in the art, the foregoing may be combined in any suitable manner with the specific meaning ascribed to the present application.

Referring to fig. 1-2, fig. 1 is a schematic perspective view illustrating an air conditioner outdoor unit according to an embodiment of the present invention, and fig. 2 is a schematic internal structure diagram of the air conditioner outdoor unit in fig. 1. The air-conditioning outdoor unit 1 is a small multi-connected air-conditioning outdoor unit with side air outlet, and the application takes the small multi-connected air-conditioning outdoor unit with side air outlet as an example for explanation. In other embodiments, the air conditioner outdoor unit 1 may be applied to other types of air conditioner outdoor units, and is not limited to a small multiple side discharge air conditioner outdoor unit.

The outdoor unit 1 of the air conditioner includes a casing 10, a blower fan bracket 20, a motor 30, a wind wheel 40, a heat exchanger 50, a middle partition plate 60, an electric control box 70, and a compressor 80. The casing 10 of the outdoor unit 1 is configured to define an installation cavity, and the fan bracket 20, the motor 30, the wind wheel 40, the heat exchanger 50, the middle partition plate 60, and the compressor 80 are disposed in the installation cavity of the casing 10.

The middle partition plate 60 is used for separating the installation cavity into a first sub-installation cavity 111 and a second sub-installation cavity 112, the first sub-installation cavity 111 is used for accommodating a fan, and the second sub-installation cavity 112 is used for accommodating the compressor 80. One end of the middle partition 60 is fixed to the housing 10, and the other end of the middle partition 60 is used for arranging the electrical control box 70 to support the electrical control box 70.

The fan comprises a motor 30 and a wind wheel 40, the motor 30 is arranged on the fan bracket 20, and the wind wheel 40 is an impeller connected to an output shaft of the motor 30. When the motor 30 works, the motor 30 drives the wind wheel 40 to rotate, an air channel is formed in the first sub-installation cavity 111 to exchange heat for the heat exchanger 50, at the moment, the first sub-installation cavity 111 is under negative pressure, the second sub-installation cavity 112 is under positive pressure, and then the air in the second sub-installation cavity 112 can flow to the first sub-installation cavity 111.

The heat exchanger 50 is at least partially positioned on one side of the fan bracket 20 facing away from the fan and is used for realizing an evaporator or a condenser; the heat exchanger 50 may also be disposed on a side wall of the housing 10 near the fan. The fan bracket 20 is located between the fan and the heat exchanger 50, so the fan bracket 20 affects the air volume of the air duct to attenuate the air volume.

The present application further optimizes the following aspects based on the overall structure of the outdoor unit 1 of the air conditioner as described above:

1. Size of fan bracket

Referring to fig. 3, fig. 3 is a schematic structural diagram of an embodiment of a blower bracket according to the present application. Fan support 20 includes support main part 21 and installation support body 22, and support main part 21 includes along first direction D1 interval setting and along two stands 211 of second direction D2 extension, and the both ends of stand 211 are installed on casing 10. The mounting frame body 22 is arranged in the interval area between the two upright posts 211 and connected with the support main body 21 for mounting the fan.

Optionally, the bracket main body 21 includes a plurality of upright posts 211, the plurality of upright posts 211 is three or more upright posts 211, and the two upright posts 211 of this embodiment are upright posts 211 located at two sides of the bracket main body 21.

The first direction D1 intersects the second direction D2, for example, the extending direction of the length of the housing 10 is defined as a first direction D1, the extending direction of the height of the housing 10 is defined as a second direction D2, and the first direction D1 is perpendicular to the second direction D2. In other embodiments, the angle between the second direction D2 and the first direction D1 can be an acute angle or an obtuse angle, for example, the angle between the second direction D2 and the first direction D1 can be 45 °, 60 °, 135 ° or 150 °, that is, the upright post 211 can be obliquely disposed in the mounting cavity of the housing 10.

The fan support 20 is formed by stamping a plate material, and the plate material thickness of the plate material can be set as t. As shown in fig. 3, the pillar 211 has a first width L1 in the first direction D1, and a ratio between the first width L1 and the thickness t of the plate material is in a range of 1-20, i.e., the first width L1 is greater than or equal to t and less than or equal to 20 t. For example, the first width L1 is t, 2t, 5t, 10t, 15t, or 20 t.

Wherein the first widths L1 of the two columns 211 may be equal; in other embodiments, the first widths L1 of the two columns 211 are not equal, such that the ratio of the first width L1 of each column 211 to the sheet thickness t is in the range of 1-20.

In this way, the first width L1 of the upright post 211 is set based on the sheet thickness t, and when the sheet thickness t is smaller, the ratio of the first width L1 to the sheet thickness t is larger; when the plate thickness t is large, the ratio of the first width L1 to the plate thickness t is small, so that the first width L1 of the upright post 211 can be limited, the wind shielding area of the bracket main body 21 is reduced, the air volume attenuation is reduced, and the usability of the outdoor unit 1 is improved.

Specifically, when the thickness t of the plate material is large, for example, the thickness t of the plate material is greater than or equal to 2mm, the strength of the plate material can meet the strength requirement of the pillar 211, and the first width L1 of the pillar 211 may be equal to the thickness t of the plate material. When the plate thickness t is small, for example, the plate thickness t is less than 2mm, that is, the plate thickness t is 0.6mm, 0.8mm or 1mm, the strength of the plate cannot meet the strength requirement of the upright post 211, and therefore the ratio between the first width L1 and the plate thickness t is large, so as to meet the strength requirement of the upright post 211.

As shown in fig. 4 and 5, the column 211 includes a column main body 212, a first reinforcing rib 213 and a second reinforcing rib 214, the first reinforcing rib 213 is disposed to protrude in a third direction relative to the column main body 212, and the first reinforcing rib 213 and the second reinforcing rib 214 are used to reinforce the strength of the column 211 so as to meet the strength requirement of the column 211.

The third direction is perpendicular to the first direction D1 and the second direction D2, and the third direction is perpendicular to a plane where the first direction D1 and the second direction D2 are located, that is, the third direction is perpendicular to the paper surface and faces outward. The first reinforcing ribs 213 have a first sub-width w1 in the first direction D1, and the ratio of the first sub-width w1 to the thickness t of the plate material is in the range of 1 to 4, i.e., the first sub-width w1 is in the range of t to 4 t.

As shown in fig. 5, the second reinforcing rib 214 is protrudingly disposed relative to the pillar main body 212 in a direction in which the two pillars 211 face away from each other, that is, a side of the pillar main body 212 facing away from the mounting frame body 22 is provided with a convex hull to form the second reinforcing rib 214. The pillar body 212 may be provided with a plurality of second reinforcing ribs 214 at intervals along the second direction D2 to reinforce the strength of the pillar body 212. The second ribs 214 have a second sub-width w2 in the first direction D1, and the ratio of the second sub-width w2 to the thickness t of the plate material is in the range of 1-2, i.e., the second sub-width w2 is in the range of t-2 t.

The pillar main body 212 is divided into at least two bent portions 215 spaced apart by the first reinforcing rib 213 in the first direction D1, for example, the pillar main body 212 includes two bent portions 215, and the first reinforcing rib 213 is located between the two bent portions 215. Each bent part 215 has a third sub-width w3 in the first direction D1, and the ratio between the third sub-width w3 and the thickness t of the plate material is in the range of 1 to 7, i.e., the third sub-width w3 is in the range of t to 7 t.

Alternatively, the first reinforcing bead 213, the second reinforcing bead 214, and the at least two bent portions 215 are integrally press-molded. Wherein the first width L1 of the upright post 211 satisfies the following formula:

L1＝w1+w2+2*w3 (1)

the upper limit value of the first sub-width w1 is 4t, the upper limit value of the second sub-width w2 is 2t, and the upper limit value of the third sub-width w3 is 7t, and as can be obtained by the formula (1), the upper limit value of the first width L1 is 20t, so that the first width L1 of the upright post 211 is limited, the wind shielding area of the bracket main body 21 is reduced, the air volume attenuation is reduced, and the usability of the air conditioner outdoor unit 1 is improved.

When the thickness t of the plate is greater than or equal to 2mm, the upright post 211 does not need to be provided with the first reinforcing rib 213 and the second reinforcing rib 214, i.e., the first sub-width w1 and the second sub-width w2 are both 0. The pillar 211 may have a plate shape, and at least two bent portions 215 are not required, and the first width L1 is t according to the formula (1). It can be deduced that the ratio between the first width L1 of the upright 211 and the sheet thickness t ranges from 1 to 20.

As shown in fig. 3, the bracket main body 21 further includes two cross beams 216, and the two cross beams 216 are spaced apart along the second direction D2 and bridge between the two vertical posts 211 along the first direction D1. The two beams 216 and the two columns 211 form a spacing region, and the mounting body 22 is disposed in the spacing region between the two beams 216.

The two cross beams 216 may include an upper cross beam and a lower cross beam, the upper cross beam is disposed above the lower cross beam along the second direction D2, the mounting frame 22 is disposed on the upper cross beam, and a wire-routing opening is formed between the mounting frame 22 and the lower cross beam, so that a wire of the fan is routed at the wire-routing opening.

The cross member 216 has a second width L2 in the second direction D2, and the ratio of the second width L2 to the thickness t of the plate material is 1-20, i.e., the second width L2 is t-20 t. Wherein the second width L2 of the beam 216 is equal to the first width L1 of the column 211; in other embodiments, the second width L2 of the cross beam 216 and the first width L1 of the upright 211 are not equal, for example, the sheet thickness t is 0.6mm, the first width L1 of the upright 211 can be 10t, and the second width L2 of the cross beam 216 can be 8 t.

Through the mode, the ratio range between the first width L1 and the plate thickness t is 1-20, the ratio range between the second width L2 and the plate thickness t is 1-20, the first width L1 and the second width L2 can be controlled simultaneously, the wind shielding area of the support main body 21 is further reduced, the air volume attenuation is reduced, and the using performance of the air conditioner outdoor unit 1 is improved.

Wherein the output shaft of the motor 30 is arranged in the third direction. The two columns 211 have a first spacing distance L3 and a second spacing distance L4 in the second direction D2, the first spacing distance L3 is located in a spacing area of the two beams 216, the second spacing distance L4 is located on a side where the two beams 216 are far away from each other, and the side where the two beams 216 are far away from each other is a side where the beams 216 are far away from the mounting frame 22. The first and second spacing distances L3 and L4 are greater than or equal to the diameter of the electric machine 30 and less than or equal to the diameter of the impeller (i.e., the diameter of the wind rotor 40), and the second spacing distance L4 is greater than or equal to the first spacing region L3.

Furthermore, the two cross beams 216 have a third separation distance in the second direction D2, the third separation distance being greater than or equal to the diameter of the motor 30 and less than or equal to the diameter of the impeller. The first, second, and third spacing distances L3, L4, and L40 are adjusted based on the diameter of the motor 30 and the diameter of the rotor 40 to facilitate the installation of the motor 30 and the rotor 40.

2. Wire pressing structure of fan bracket

Referring to fig. 4, fig. 4 is a schematic view of a back side structure of the blower bracket of fig. 3. The bracket main body 21 further comprises a wire fixing portion 217 and a wire pressing portion 218, wherein the wire fixing portion 217 is arranged on one side of the cross beam 216, which faces away from the motor 30, and the wire pressing portion 218 is arranged on one side of the upright post 211, which faces away from the motor 30. For example, the motor 30 is disposed on the front surface of the fan support 20, and the front surface of the fan support 20 is the front surface of the cross beam 216 and the front surface of the upright 211; therefore, the wire fixing portion 217 is disposed on the back surface of the beam 216, and the wire pressing portion 218 is disposed on the back surface of the pillar 211.

Specifically, the back of the beam 216 is provided with a wire fixing portion 217 for restraining the wire. The wire fixing portion 217 is provided with a first lead hole 219, the first lead hole 219 is used for accommodating a lead wire 221 of the blower, and the first lead hole 219 may have an L-shape. For example, the lead 221 of the blower is a motor wire of the motor 30, and the lead 221 is led out from the routing port and passes through the first lead hole 219, so that the lead 221 is constrained at the first lead hole 219.

The pressing portion 218 is bendable relative to the upright 211 and is used for pressing the conducting wire 221 on the upright 211. The pressing portion 218 includes a pressing main body 222 and at least two connecting legs 223, the pressing main body 222 is connected to the pillar 211 through the connecting legs 223, and the connecting legs 223 are used for bending relative to the pillar 211 under the action of external force, so that the pressing main body 222 can press the lead 221 on the pillar 211. The width of the end of the connecting leg 223 connected to the line pressing body 222 is smaller than the width of the end of the connecting leg 223 connected to the pillar 211, so that the connecting leg 223 can be easily broken by external force.

The pressing line body 222 is provided with a second lead hole 224, and the lead 221 extends from between the pressing line body 222 and the pillar 211 to a side of the pressing line body 222 away from the pillar 211 through the second lead hole 224. The conductive line 221 is first constrained by the first lead hole 219, then disposed on the side of the pillar 211 away from the motor 30 along the second direction D2, and then extends from between the line pressing body 222 and the pillar 211 to the side of the line pressing body 222 away from the pillar 211 through the second lead hole 224. The connecting leg 223 is bent relative to the vertical column 211 by an external force so that the pressing line body 222 can press the lead 221 against the vertical column 211, as shown in fig. 6. Therefore, the wires 221 are easy to route on the fan support 20, simple and convenient, and reduce abrasion.

The wire pressing main body 222, the at least two connecting support legs 223 and the upright post 211 are formed by integrally stamping plates, so that the welding process of the fan bracket 20 is reduced, and the abrasion of the wire pressing main body 222 to the lead 221 is reduced. The width of the pressing line body 222 is less than or equal to the first width L1 to avoid increasing the wind shielding area of the bracket body 21.

The application further provides a fan bracket, and the structure of fan bracket is the same with the structure of above-mentioned fan bracket 20 that describes, and is no longer repeated here.

3. The middle clapboard is used for supporting the electric control box

Referring to fig. 2 and 7, the middle partition plate 60 includes a partition plate main body 61 and a supporting portion 62, and the partition plate main body 61 is used for dividing the installation cavity into a first sub-installation cavity 111 and a second sub-installation cavity 112. The support portion 62 is provided at the top of the diaphragm main body 61, and the support portion 62 extends toward the first sub-mounting cavity 111. One end of the partition main body 61 is mounted in the housing 10, and the other end of the partition main body 61 (i.e., the top of the partition main body 61) is provided with a support portion 62. The electronic control box 70 is disposed on the supporting portion 62, and the supporting portion 62 is used for supporting the electronic control box 70, so that the contact area between the middle partition plate 60 and the electronic control box 70 can be increased to prevent the electronic control box 70 from tilting.

The top of current median septum belongs to the waste material, needs to tailor and falls, and this embodiment sets up the top of baffle main part 61 as supporting part 62, utilizes current waste material as supporting part 62, improves the utilization ratio, reduce cost. The existing electric control box is fixed on the middle partition plate and the fan bracket, so that the size of the electric control box is large, and the electric control box 70 of the embodiment is arranged on the supporting part 62, so that the electric control box is not required to be fixed on the fan bracket 20, the size of the electric control box 70 is reduced, the area of the electric control box 70 arranged in the first sub-installation cavity 111 is reduced, and the air quantity attenuation can be further reduced.

As shown in fig. 7-8, a bottom through hole 711 is formed in the bottom wall of electronic control box 70, and a stepped groove 621 is formed on one side of support portion 62 facing bottom through hole 711 of electronic control box 70, where stepped groove 621 is opposite to bottom through hole 711 of electronic control box 70, so that support portion 62 and electronic control box 70 cooperate to form a first air duct. For example, the stepped groove 621 is disposed below the bottom of the electrical control box 70, and the stepped groove 621 and the bottom of the electrical control box 70 form a receiving space, i.e., a first air duct.

The stepped groove 621 can include a first sub-groove body 622 and a second sub-groove body 623, the depth of the second sub-groove body 623 is greater than that of the first sub-groove body 622, and the second sub-groove body 623 is opposite to the bottom through hole 711 of the electronic control box 70 and is communicated with the outside through the first sub-groove body 622. For example, the second sub-slot 623 is disposed below the bottom through hole 711 of the electrical control box 70, so that the second sub-slot 623 is disposed opposite to the bottom through hole 711 of the electrical control box 70.

When the motor 30 drives the wind wheel 40 to rotate, for example, the wind wheel 40 rotates clockwise, air is sucked from the electronic control box 70 through the first air duct, that is, the air flow of the electronic control box 70 can flow out from the bottom through hole 711 of the electronic control box 70, and then flows out into the first sub-installation cavity 111 through the second sub-groove body 623 and the first sub-groove body 622, so that heat generated by the electronic control box 70 in the working process is taken away.

The bottom of the electrical control box 70 is further provided with a baffle 712, the baffle 712 is located at one side of the bottom through hole 711 facing the first sub-groove 622 and is used for preventing liquid drops in the first air duct from entering the electrical control box 70 through the bottom through hole 711, and the baffle 712 has a shielding effect relative to the bottom through hole 711. For example, when the wind wheel 40 throws water, the baffle 712 is used to shield the bottom through hole 711, so that liquid droplets (e.g., water droplets) are not easy to enter the electronic control box 70 through the bottom through hole 711, and the electronic control box 70 is ensured to normally work.

As shown in fig. 7 to 8, the water drops blocked by the baffle 712 fall into the second sub-tank 623, and a drain hole 624 is further disposed at the bottom of the second sub-tank 623 and used for draining the liquid drops in the second sub-tank 623. The drainage hole 624 is disposed near the first sub-tank 622, so that the drainage hole 624 is located at a side of the baffle 712 near the first sub-tank 622, that is, the water drops blocked by the baffle 712 fall to the drainage hole 624, so as to drain water through the drainage hole 624. The second sub-tank 623 can be provided with two drainage holes 624 to accelerate drainage; in other embodiments, the second sub-groove 623 may be provided with a plurality of drain holes 624, for example, 4 drain holes 624.

Optionally, the distance between the first sub-groove 622 and the bottom of the electronic control box 70 is greater than or equal to 1mm and less than or equal to 9mm, which not only can ensure that the electronic control box 70 realizes ventilation and heat dissipation, but also can reduce the risk that a large amount of water drops in the first sub-installation cavity 111 enter the first air duct, so as to ensure that the electronic control box 70 runs reliably.

In this way, the supporting portion 62 is used for supporting the electronic control box 70 and preventing the electronic control box 70 from tilting; the supporting portion 62 is provided with the ladder groove 621 to make the supporting portion 62 and the cooperation of automatically controlled box 70 form first wind channel, can realize taking away the heat that automatically controlled box 70 produced in the course of the work, in order to carry out ventilation cooling to automatically controlled box 70, easily realize need not welding process, reduce cost.

4. Double air ducts of electric control box

As shown in fig. 8 to 10, the electrical control box 70 is provided with a lateral through hole 713 in a side wall away from the second sub-mounting cavity 112, and the air flow of the electrical control box 70 can flow out from the lateral through hole 713 of the electrical control box 70. The outdoor unit 1 further includes a waterproof box 90, and the waterproof box 90 is covered on the lateral through hole 713 and is used for preventing liquid drops in the first sub-installation cavity 111 from entering the electric control box 70 through the lateral through hole 713 so as to ensure normal operation of the electric control box 70.

The waterproof box 90 is matched with the side wall of the electric control box 70 to form a second air duct, and when the wind wheel 40 rotates, the fan sucks air from the electric control box 70 through the second air duct. That is, the airflow of the electronic control box 70 can flow out from the lateral through hole 713, and then flow out into the first sub-mounting cavity 111 through the second air duct, so as to take away the heat generated by the electronic control box 70 in the working process.

The outdoor unit 1 of the air conditioner realizes ventilation and heat dissipation of the electric control box 70 by the double air channels by arranging the first air channel and the second air channel; the electronic control box 70 can realize partial circulation through the first air duct and the second air duct, so as to enhance the heat dissipation of the electronic control box 70. The heat generated by the electronic control box 70 in the working process can flow to the first sub-installation cavity 111 through the first air duct and the second air duct quickly, and the electronic control box 70 can realize quick ventilation and heat dissipation.

The waterproof box 90 includes a slope plate 911 that is provided opposite the lateral through hole 713 while being spaced from the side wall of the electric control box 70, and the slope plate 911 is provided obliquely with respect to the axial line of the lateral through hole 713 such that the spacing between the slope plate 911 and the side wall of the electric control box 70 gradually decreases in the direction of gravity. The interval between the inclined panel 911 and the side wall of the electronic control box 70 is reduced, which can reduce the risk that water drops in the first sub-mounting cavity 111 enter the second air duct through the air outlet 912.

The extending direction of the axial line of the lateral through hole 713 may be a first direction D1, and the included angle between the inclined panel 911 and the axial line of the lateral through hole 713 is an acute angle, for example, the included angle between the inclined panel 911 and the axial line of the lateral through hole 713 may be 30 °, 45 °, or 60 °.

An air outlet 912 is formed between the lower end of the inclined panel 911 and the side wall of the electronic control box 70, and the airflow of the electronic control box 70 flows out to the first sub-mounting cavity 111 through the air outlet 912.

As shown in fig. 9, the waterproof box 90 further includes a top plate 913 and two side plates 915, the two side plates 915 and the inclined plate 911 are connected to the top plate 913, the inclined plate 911 is connected to the two side plates 915, and the two side plates 915 are mounted on the side walls of the electric control box 70, so that the waterproof box 90 covers the lateral through hole 713.

The side plate 915, the inclined plate 911 and the top plate 913 of the waterproof box 90 are disposed in a triangle, so that the air flow of the electronic control box 70 in the second air duct is increased, and the waterproof performance of the waterproof box 90 is improved.

As shown in fig. 2, an angle between the extending direction D4 of the inclined panel 911 and the tangential direction D5 of a point where the impeller (i.e., the wind wheel 40) of the fan is closest to the air outlet 912 is 0 to 5 °. The position point where the distance between the inclined panel 911 and the wind wheel 40 is the smallest is obtained to obtain the position point closest to the air outlet 912.

When the included angle is 0 °, the extending direction D4 of the inclined plane board 911 is parallel to the tangential direction D5 of the position point of the wind wheel 40 closest to the air outlet 912, so that the fan can suck air from the lateral through hole 713 of the electronic control box 70 through the second air duct, and ventilation and heat dissipation of the electronic control box 70 are realized. Wherein the included angle may be 1 °, 2 ° or 5 °.

The side wall of the electronic control box 70 is provided with a first baffle 714 near the air outlet 912, for example, the first baffle 714 may be disposed parallel to the top plate 913, and the first baffle 714 is used to block liquid drops in the first sub-mounting cavity 111 from entering the electronic control box 70 through the second air duct and the lateral through hole 713.

The waterproof box 90 further includes a folded edge 914 disposed at a lower end of the inclined panel 911, the folded edge 914 is disposed to be folded toward the electrical control box 70 compared to the inclined panel 911, and the folded edge 914 is used for blocking liquid droplets in the first sub-mounting cavity 111 from entering the electrical control box 70 through the second air duct and the lateral through hole 713. For example, when the motor 30 stops working, the wind wheel 40 rotates counterclockwise under the external force, the folded edge 914 is used to block the water drops in the first sub-mounting cavity 111 from entering the second air duct through the air outlet 912, and the first baffle 714 is used to block the water drops in the second air duct from entering the electronic control box 70 through the second air duct and the lateral through hole 713.

As shown in fig. 7, a first positioning portion 625 is further disposed on the supporting portion 62, and the first positioning portion 625 may be a groove disposed on the supporting portion 62. As shown in fig. 10, a second positioning portion 715 is further disposed at the bottom of the electrical control box 70, the second positioning portion 715 may be a convex hull disposed at the bottom of the electrical control box 70, and the first positioning portion 625 and the second positioning portion 715 cooperate with each other to realize the assembling positioning of the supporting portion 62 and the electrical control box 70. In other embodiments, the first positioning portion 625 may be a convex hull and the second positioning portion 715 may be a concave hull.

When the electrical control box 70 is mounted on the supporting portion 62 of the middle partition plate 60, the first positioning portion 625 and the second positioning portion 715 are matched with each other to assemble and position the supporting portion 62 and the electrical control box 70; the electronic control box 70 is then fixed to the support 62 by screws. Therefore, the electrical control box 70 can be disposed on the supporting portion 62, and the contact area between the supporting portion 62 and the electrical control box 70 is increased to prevent the electrical control box 70 from tilting.

5. Assembly of electric control box

As shown in fig. 11-14, the electronic control box 70 includes a box body 72, and the box body 72 forms an accommodating space. As shown in fig. 12, the electric control box 70 further includes a main board 73, a heat sink 74, and a support member 75, and the main board 73, the heat sink 74, and the support member 75 may be disposed in the accommodating space.

In fig. 13, the box body 72 includes a side plate 721, and the main plate 73 can be mounted on the side plate 721, wherein the side plate 721 can be a plastic plate; in other embodiments, side plate 721 may be a mounting plate of other materials, such as polypropylene or polyethylene, for example.

Wherein the main plate 73 overlaps one side of the side plate 721. For example, the side plate 721 may be provided with a plurality of snaps 724 (a plurality means two or more), and the main plate 73 is provided on the side plate 721 through the snaps 724, so that the main plate 73 is overlapped on one side of the side plate 721 and the main plate 73 is positioned. Alternatively, the side plate 721 may be provided with a support column (not shown) for supporting the main plate 73 so that the main plate 73 and the side plate 721 are spaced apart. In other embodiments, the main plate 73 may be attached directly to one side of the side plate 721 without providing a support column.

As shown in fig. 14, the electronic control box 70 further includes a first fixing member 76, the first fixing member 76 is used for fixing the main board 73 to the side board 721, the side board 721 may be provided with a plurality of mounting holes 722, the main board 73 is provided with a plurality of through holes 731, and the plurality of through holes 731 and the plurality of mounting holes 722 are arranged in a one-to-one correspondence. For example, the side plate 721 is provided with 4 mounting holes 722, and the main plate 73 is correspondingly provided with 4 through holes 731. The mounting holes 722 are spaced in the main board 73, so that the main board 73 can balance stress, and the reliability of assembling the electronic control box 70 can be ensured.

The first fixing member 76 may be a bolt, the mounting hole 722 may be riveted with a first nut 723, and the bolt is inserted into the through hole 731 and is matched with the first nut 723 of the mounting hole 722 to fix the main plate 73 on the side plate 721. In other embodiments, the first nut 723 may be disposed on a side of the side plate 721 away from the main plate 73.

In this way, the main board 73 is fixed on one side of the side plate 721 through the buckle 724 and the first fixing piece 76, the number of the first fixing pieces 76 can be reduced, the number of the through holes 731 arranged on the main board 73 is reduced, and the utilization rate of the main board 73 is further improved.

As shown in fig. 12, the heat sink 74 is disposed on a side of the main plate 73 away from the side plate 721, and is used for dissipating heat from the main plate 73. The supporting member 75 is disposed on a side of the heat sink 74 close to the main plate 73, and is used to support the heat sink 74 on the main plate 73. The main plate 73 is further provided with a first through hole 732, the support member 75 is provided with a second through hole 751, the heat sink 74 is provided with a third through hole 741, and the first through hole 732, the second through hole 751 and the third through hole 741 are arranged in a one-to-one correspondence manner, that is, the number of the first through holes 732, the number of the second through holes 751 and the number of the third through holes 741 are equal.

The electronic control box 70 further comprises a fixing member 71, wherein the fixing member 71 is inserted into the first through hole 732, the second through hole 751 and the third through hole 741 which are correspondingly arranged, and is fixedly connected with the side plate 721 of the box body 72, so as to press and fix the main plate 73 and the heat sink 74 on the side plate 721. The fixing member 71 directly applies force to the supporting member 75 to press and fix the main plate 73 and the heat sink 74 to the side plate 721; the supporting member 75 is disposed between the main plate 73 and the heat sink 74, and is used for buffering the main plate 73 and the heat sink 74, so as to prevent the main plate 73 and the heat sink 74 from being strained and deformed.

The fixing member 71 may be a bolt, and since the fixing member 71 needs to press and fix the main plate 73 and the heat sink 74 to the side plate 721, the length of the fixing member 71 is greater than that of the first fixing member 76, that is, the fixing member 71 may be a long bolt, and the first fixing member 76 may be a short bolt.

The supporting member 75 is disposed between the main plate 73 and the heat sink 74, and does not need to pass through the main plate 73, so that the diameter of the first through hole 732 of the main plate 73 is greater than or equal to the diameter of the fixing member 71, so that the fixing member 71 is disposed in the first through hole 732. The diameter range of the first through hole 732 of the main plate 73 may be 4-7mm, for example, the diameter of the fixing member 71 is 4mm, and the diameter of the first through hole 732 may be 5mm, so that the fixing member 71 can be inserted into the first through hole 732, and the area of the first through hole 732 can be prevented from being too large, thereby preventing the area of the opening of the main plate 73 from being affected. The diameter of the second through hole 751 and the diameter of the third through hole 741 may be the same as the diameter of the first through hole 732, and the diameter of the second through hole 751 and the diameter of the third through hole 741 are both 5 mm. In other embodiments, the diameter of the second through hole 751 and the diameter of the third through hole 741 may be different from the diameter of the first through hole 732, for example, the diameter of the second through hole 751 is 6mm, and the diameter of the third through hole 741 is 4 mm.

In current automatically controlled box, automatically controlled box is provided with the insulated column that runs through the mainboard, and the diameter of the through-hole of mainboard is greater than the diameter of insulated column, and the through-hole diameter of mainboard is 15 mm. Because the automatically controlled box 70 of this embodiment need not to set up the insulating column, and the diameter of insulating column is greater than the diameter of mounting 71, and the diameter of the first through-hole 732 of mainboard 73 is 5mm, compares with the through-hole diameter of current mainboard, reduces 10mm, and mainboard 73 is provided with a plurality of first through-holes 732, therefore the trompil area of mainboard 73 reduces, can increase the utilization ratio of mainboard 73, and then reduces the size of mainboard 73, realizes that automatically controlled box 70 is miniaturized.

As shown in fig. 12, the heat sink 74 further includes a heat dissipating body 742, a heat dissipating tube 743 and a heat dissipating bracket 744, wherein the heat dissipating tube 743 is located between the heat dissipating body 742 and the heat dissipating bracket 744. The third through hole 741 is disposed between the heat dissipating body 742 and the heat dissipating bracket 744, that is, the third through hole 741 penetrates through the heat dissipating body 742 and the heat dissipating bracket 744, and the third through hole 741 avoids the heat dissipating tube 743, so as to prevent the fixing element 71 from being blocked by the heat dissipating tube 743. The main plate 73 and the radiator 74 are fixed to the side plate 721 by being pressed by the fixing member 71, so that the heat dissipating body 742 and the heat dissipating bracket 744 are used to compress the heat dissipating tube 743.

One end of the supporting member 75 facing the heat sink 74 is inserted and fixed in the third through hole 741 in a tight fit manner, and the other end of the supporting member 75 facing the main board 73 is larger than the first through hole 732 and is supported on the periphery of the first through hole 732. An area of an end of the support 75 facing the heat sink 74 is smaller than an area of the third through hole 741, so that the end of the support 75 can be inserted into the third through hole 741 until a cross-sectional area of the support 75 is larger than the area of the third through hole 741.

The main board 73 is further provided with a power element 733, and the power element 733 may be provided on a side of the main board 73 close to the heat sink 74. One end of the support 75 is inserted into the depth of the third through hole 741, and the height of the support 75 is greater than or equal to the sum of the depth and the height of the power element 733. For example, the height of the support 75 is equal to the sum of the depth and the height of the power component 733, and when one end of the support 75 is inserted into the third through hole 741, the height of the support 75 outside the third through hole 741 is equal to the height of the power component 733, so that the power component 733 is attached to one side of the heat sink 74 close to the motherboard 73, and the heat sink 74 is used for dissipating heat of the power component 733.

The sectional area of the supporting member 75 becomes larger from one end of the supporting member 75 to the other end of the supporting member 75, and when the sectional area of the supporting member 75 is larger than the area of the first through hole 732, the supporting member 75 is inserted and fixed in the third through hole 741 in a tight fit manner. The other end of the supporting member 75 has an area larger than that of the first through hole 732, and the other end of the supporting member 75 cannot be inserted into the first through hole 732, so that the other end of the supporting member 75 facing the main plate 73 is supported at the periphery of the first through hole 732.

When the electric control box 70 is assembled, firstly, the main board 73 is arranged on the side plate 721 through the buckle 724, so as to realize the assembling positioning of the plurality of through holes 731 and the plurality of mounting holes 722; then, the first fixing piece 76 is arranged in the through hole 731 and the mounting hole 722 in a penetrating manner so as to fix the main plate 73 on one side of the side plate 721; then, the supporting member 75 and the heat sink 74 are sequentially disposed on a side of the main board 73 away from the side plate 721, so that the first through hole 732, the second through hole 751 and the third through hole 741 are disposed in a one-to-one correspondence; the fixing member 71 is inserted into the first through hole 732, the second through hole 751 and the third through hole 741, so as to press and fix the main board 73 and the heat sink 74 onto the side board 721, thereby implementing the assembly of the electronic control box 70.

One side that the insulating column was kept away from to the box body of current automatically controlled box is provided with the panel beating for improve the intensity of box body, prevent that the box body of automatically controlled box from being pulled by the insulating column and split. In the embodiment, the main plate 73 is fixed to one side of the side plate 721 by the first fixing member 76, and the main plate 73 and the heat sink 74 are fixed to the side plate 721 by pressing the fixing member 71, and no insulating column is required, so that no additional metal plate is required to be arranged, and the cost is saved.

In the through-hole of mainboard is worn to locate by current bolt through the insulated column, the insulated column is used for insulating bolt and mainboard, and the through-hole 731 of mainboard 73 of this embodiment and the lateral wall of first through-hole 732 all are provided with the insulating layer, and the insulating layer is used for preventing that first mounting 76 and mounting 71 are connected with the conducting layer of mainboard 73.

6. The power element and the heat dissipation tube of the main board are arranged in an overlapping manner

Referring to fig. 15 and 1, fig. 15 is a schematic structural diagram of an embodiment of a motherboard and a heat sink according to the present application. The electronic control box 70 may include a main board 73 and a heat sink 74, and the heat sink 74 is disposed to overlap the main board 73, wherein a side of the main board 73 close to the heat sink 74 (the side close to the heat sink 74) is provided with at least one power component 733, for example, the main board 73 is provided with a plurality of power components 733. The heat sink 74 includes a heat dissipating tube 743, and the heat dissipating tube 743 is operatively connected to the compressor 80 for transmitting the refrigerant flow to dissipate heat from the power component 733 by the refrigerant flow.

As shown in fig. 11, the electrical control box 70 includes a box body 72, the box body 72 forms an accommodating space, a main board 73 and a heat sink 74 are disposed in the accommodating space, the electrical control box 70 is disposed on the supporting portion 62 of the middle partition plate 60 in a reverse manner, for example, the main board 73 and the heat sink 74 are disposed in the box body 72, and the box body 72 is disposed on the supporting portion 62 in a reverse manner. In other embodiments, the box 72 may also be vertically disposed on the middle partition 60.

The power element 733 may be a high-power electronic element on the main board 73, for example, the power element 733 may be an IGBT (Insulated Gate Bipolar Transistor) or a diode, and the power element 733 generates heat when operating. The main board 73 may be a Printed Circuit Board (PCB), a copper foil (not shown) may be laid on a side of the main board 73 close to the heat sink 74, one end of the copper foil is connected to the power component 733, and the other end of the copper foil is connected to other components or circuits, so that the electronic control box 70 operates normally. In order to facilitate soldering or the like of the pins of the power component 733, the pins of the power component 733 may be arranged side by side on the main board 73.

For example, the temperature of the power element 733 can reach 80 ° during operation, and the temperature of the coolant flow of the heat dissipation tube 743 can be 30-50 °, so the coolant flow of the heat dissipation tube 743 can absorb the heat of the power element 733, thereby reducing the temperature of the power element 733 and prolonging the service life of the power element 733. The refrigerant flow of the heat dissipation tube 743 may be a gas-liquid refrigerant flow, and after the refrigerant flow of the heat dissipation tube 743 absorbs heat of the power element 733, the refrigerant flow of the heat dissipation tube 743 is changed into a gas refrigerant flow.

As shown in fig. 16, a side surface 734 of at least one power component 733 is disposed to overlap the heat dissipation tube 743, that is, one or more power components 733 of the motherboard 73 are disposed to overlap the heat dissipation tube 743, for example, all the power components 733 of the motherboard 73 may be disposed to overlap the heat dissipation tube 743.

A dotted line frame H in fig. 16 indicates the position of the heat dissipation tube 743, and the width of the dotted line frame H is equal to the width of the heat dissipation tube 743. The heat dissipation tube 743 is disposed above the power devices 733, and a projection of the heat dissipation tube 743 on the motherboard 73 overlaps a side surface 734 of at least one of the power devices 733, such that the side surface 734 overlaps the heat dissipation tube 743.

Wherein, the ratio between the overlapping area of the at least one power element 733 and the heat dissipation tube 743 and the area of the corresponding side surface 734 is greater than or equal to 1/5. That is, in all the power elements 733 provided so as to overlap with the heat dissipation tube 743, the ratio between the overlapping area of any one of the power element 733 and the heat dissipation tube 743 and the area of the side surface 734 of that power element 733 is greater than or equal to 1/5; alternatively, the ratio between the overlapping area of each of the other number of power elements 733 and the heat dissipation tube 743 and the area of the corresponding side surface 734 is greater than or equal to 1/5.

Alternatively, among all the power elements 733 disposed to overlap with the heat dissipation tube 743, the ratio between the overlapping area of the single power element 733 and the heat dissipation tube 743 and the area of the side surface 734 is greater than or equal to 1/5. Wherein the ratio between the overlapping area and the area of the side surface 734 may be 1/5, 1/4, 1/3, 2/5, 1/2, 3/5, 2/3, 3/4 or 1. As shown in fig. 17, the overlapping area of the power element a1 and the heat dissipation tube 743 is equal to 2/3 which is the area of the side surface of the power element a 1; 1/2 in which the overlapping area of the power element B1 and the heat dissipation tube 743 is equal to the area of the side surface of the power element B1; the overlapping area of the power element C1 and the heat dissipation tube 743 is equal to the area of the side surface of the power element C1, i.e., the projection of the heat dissipation tube 743 on the main board 73 completely overlaps with the power element C1.

As shown in fig. 18, the heat sink 74 further includes a heat dissipating body 742 and a heat dissipating bracket 744, the heat dissipating body 742 is provided with a heat dissipating groove 748, the heat dissipating tube 743 is disposed in the heat dissipating groove 748, and the heat dissipating bracket 744 is disposed on the heat dissipating body 742 and the heat dissipating tube 743 for pressing the heat dissipating tube 743 into the heat dissipating groove 748.

Simulation tests were performed on the heat dissipation body 742 with power elements a1, a2, B1, B2, B3, C1, C2, and E (i.e., heat sources) as shown in fig. 17. Wherein, the external diameter of the radiating pipe 743 is 9.25mm, and the internal diameter of the radiating pipe 743 8.02mm, the temperature of the refrigerant inlet of the heat dissipation tube 743 is 43 ℃, the pressure of the refrigerant inlet of the heat dissipation tube 743 is 3.1Mpa, the flow rate of the refrigerant inlet of the heat dissipation tube 743 is 650kg/h, the flow velocity of the refrigerant inlet of the heat dissipation tube 743 is 3.69m/s, and the density of the refrigerant flow is 967.36kg/m³The constant-pressure specific heat capacity of the refrigerant flow is 1.9376kJ/kg.K, and the heat conductivity coefficient of the refrigerant flow is 80.304 w/m.K. The power elements a1 and a2 each had an area of 25 × 25mm²The heating power is 6W; the power elements B1, B2 and B3 each had an area of 12 × 12mm²The heating power is 40W; the power elements C1 and C2 each had an area of 6 × 6mm²The heating power is 6W; the area of the power element E is 27 × 19mm²The heating power was 6W. The heat dissipation tube 743 is used for dissipating heat of the power elements a1, a2, B1, B2, B3, C1, C2 and E, and the simulation test result is as follows: the maximum temperatures of the power elements A1, A2, B1, B2, B3, C1, C2 and E were 45.2 deg.C, 45.3 deg.C, 100.2 deg.C, 100.7 deg.C, 100.1 deg.C, 70.6 deg.C, 70.7 deg.C and 45.4 deg.C, respectively.

Based on the above simulation test results, the following conclusions can be derived:

1. in the case where the areas of the side surfaces 734 of the plurality of power elements 733 and the heat generation power are equal, and the overlapping areas of the plurality of power elements 733 and the heat dissipation pipe 743 are equal, the power elements 733 have the same heat dissipation effect at different positions of the heat dissipation pipe 743, for example, the heat dissipation effects of the power elements a1 and a2 are the same, the heat dissipation effects of the power elements B1, B2 and B3 are the same, and the heat dissipation effects of the power elements C1 and C2 are the same.

2. When the heat generation powers of the plurality of power elements 733 are equal to each other, the larger the overlapping area between the power element 733 and the heat pipe 743 is, the better the heat dissipation effect of the power element 733 on the heat pipe 743 is. For example: the heating power of the power elements A1 and C1 is 6W, the overlapping area of the power element A1 and the radiating pipe 743 is larger than that of the power element C1 and the radiating pipe 743, the maximum temperature of the power element A1 is detected to be 45.2 ℃, and the maximum temperature of the power element C1 is detected to be 70.6 ℃; the heating power of the power elements C1 and E is 6W, the overlapping area of the power element E and the heat dissipation tube 743 is larger than that of the power element C1 and the heat dissipation tube 743, the maximum temperature of the power element E is detected to be 45.4 ℃, and the maximum temperature of the power element C1 is detected to be 70.6 ℃.

3. In the case where the heat generation powers of the plurality of power elements 733 are equal and the overlapping areas of the plurality of power elements 733 and the heat dissipation pipe 743 are equal, the power elements 733 have the same heat dissipation effect on the heat dissipation pipe 743, for example, the heat generation powers of the power elements a1 and E are all 6W, the overlapping area of the power element a1 and the heat dissipation pipe 743 and the overlapping area of the power element E and the heat dissipation pipe 743 are approximately equal, and it is detected that the maximum temperature of the power element a1 is 45.2 ℃, and the maximum temperature of the power element E is 45.4 ℃.

Through the above manner, in the embodiment, one side surface 734 of the at least one power element 733 is overlapped with the heat dissipation tube 743, the ratio of the overlapping area of the at least one power element 733 and the heat dissipation tube 743 to the area of the corresponding side surface 734 is greater than or equal to 1/5, the heat dissipation area between the power element 733 and the heat dissipation tube 743 is increased, and the heat dissipation effect of the power element 733 on the heat dissipation tube 743 can be improved; in addition, the larger the overlapping area of the power element 733 and the heat dissipation tube 743 is, the better the heat dissipation effect of the power element 733 on the heat dissipation tube 743 is.

As shown in fig. 19, the heat dissipation tube 743 includes two body portions 745 and a connection portion 746, each body portion 745 has two ends, one end of one body portion 745 of the two body portions 745 serves as an inlet of the heat dissipation tube 743, one end of the other body portion 745 of the two body portions 745 serves as an outlet of the heat dissipation tube 743, and the other ends of the two body portions 745 are connected by the connection portion 746, so that the refrigerant flow enters the heat dissipation tube 743 from the inlet of the heat dissipation tube 743, flows through the two body portions 745 sequentially, and flows out of the heat dissipation tube 743 from the outlet of the heat dissipation tube 743.

In other embodiments, the heat dissipation tube 743 may include a plurality of body portions 745, and may be three or more, for example, the heat dissipation tube 743 includes three body portions 745, one end of one body portion 745 among the three body portions 745 serves as an inlet of the heat dissipation tube 743, one end of the remaining body portions 745 among the three body portions 745 serves as an outlet of the heat dissipation tube 743, and each two ends of the remaining ends of the three body portions 745 are connected by a connection portion 746.

As shown in fig. 16-17, at least one power component 733 is disposed to overlap at least one main body 745 of the heat dissipation tube 743, for example: the side surface 734 of the power element 733 may be disposed to overlap one body portion 745 of the heat dissipation tube 743, and the overlapping portion of the heat dissipation tube 743 and the heat dissipation body 742 in fig. 17 may correspond to two body portions 745 in fig. 19, that is, the power elements B1, B2, B3, C1, and C2 in fig. 17 are all disposed to overlap one body portion 745; alternatively, the side surface 734 of the power element 733 may be disposed to overlap two or more body portions 745 of the heat dissipation tube 743, that is, the power elements a1, a2, and E in fig. 17 are disposed to overlap two body portions 745.

Wherein, the plurality of body portions 745 of the heat dissipation tube 743 can be located in the same plane; in other embodiments, the body portions 745 of the heat pipe 743 may be located in different planes to facilitate production diversity and meet practical requirements.

Alternatively, the connecting portion 746 is a U-shaped tube through which the remaining ends of the two main body portions 745 are connected. In another embodiment, the heat sink 74 may further include the main body 745 as one heat pipe 743, and the heat sink 74 may adjust the diameter of the heat pipe 743 to provide a plurality of heat pipes 743, for example, three or more, when the width of the heat pipe 742 is fixed.

As shown in fig. 20, the separation distance w4 between the stylets of the two body portions 745 is greater than or equal to D and less than or equal to 2D +15mm, for example, the separation distance w4 between the stylets of the two body portions 745 is D, 2D or 2D +15 mm. Wherein D is the diameter of the heat dissipating tube 743, i.e., the diameter of the body 745; the stylet of the body portion 745 may be the center of the body portion 745. When the heat dissipation tube 743 may include a plurality of body portions 745, a separation distance w4 between the tube cores of two adjacent body portions 745 is greater than or equal to D, and less than or equal to 2D +15 mm.

The width of the heat dissipation body 742 is greater than or equal to D + w4 and less than or equal to w4+ 3D; that is, the width of the heat dissipating body 742 is greater than or equal to 2D and less than or equal to 5D +15mm, so the spacing distance w4 between the die of the two main bodies 745 and the width of the heat dissipating body 742 are both related to the diameter D of the heat dissipating tube 743, and the size of the heat sink 74 is adjusted based on the diameter D of the heat dissipating tube 743, so as to produce heat sinks 74 with different sizes, and meet the actual requirement.

Since the two ends of the U-shaped tube have a spacing, the separation distance w4 between the stylets of the two body portions 745 is greater than D. When the width of the heat dissipating body 742 and the spacing distance w4 between the pipe cores of the two body portions 745 are fixed, the number and diameter of the body portions 745 of the heat dissipating pipe 743 are adjusted, the overlapping area of the power element 733 and the heat dissipating pipe 743 is not changed, and the heat dissipating effect of the power element 733 on the heat dissipating pipe 743 is the same.

7. Distance between heat sink and power element

As shown in fig. 20, the heat sink 74 includes a heat dissipating body 742 and a heat dissipating tube 743 (i.e., a body 745), wherein the first surface 7421 of the heat dissipating body 742 is provided with a heat dissipating groove 748, and the heat dissipating tube 743 is disposed in the heat dissipating groove 748. The second surface 7422 of the heat dissipating body 742 and the first surface 7421 of the heat dissipating body 742 are disposed back to back, the heat dissipating tube 743 is disposed on the first surface 7421 of the heat dissipating body 742, and the second surface 7422 of the heat dissipating body 742 is used for contacting a heat source, such as the power component 733 of the motherboard 73. The width of the heat dissipating body 742 is equal to the width of the heat dissipating body 742 on the first surface 7421.

The distance h1 between the bottom of the heat sink 748 and the second surface 7422 of the heat sink body 742 is 2-10mm, the bottom of the heat sink 748 may be the position where the distance between the heat sink 748 and the second surface 7422 of the heat sink body 742 is the smallest, and the distance h1 may be 2mm, 5mm, 6mm, and 10 mm. The power device 733 of the main board 73 is disposed on the second surface 7422 of the heat dissipating body 742, and the distance h1 between the bottom of the heat dissipating groove 748 and the second surface 7422 of the heat dissipating body 742 is adjusted to adjust the distance between the heat dissipating tube 743 and the power device 733 of the main board 73, thereby improving the heat dissipating effect of the heat dissipating tube 743 on the power device 733.

Alternatively, the heat dissipation body 742 may be an aluminum alloy body, that is, the material of the heat dissipation body 742 is an aluminum alloy, and the heat dissipation body 742 is formed by stamping an aluminum alloy. In other embodiments, the heat dissipating body 742 may be made of other materials, such as copper alloy for the heat dissipating body 742.

As shown in fig. 17, simulation tests were performed with power elements a1, a2, B1, B2, B3, C1, C2, and E respectively provided on three heat sinks 74. The simulation parameters of the heat dissipation tube 743, the simulation parameters of the refrigerant flow, and the simulation parameters of the power elements a1, a2, B1, B2, B3, C1, C2, and E are the same as those described above, and are not described again here. The three radiators 74 include a first radiator, a second radiator and a third radiator, the distance h1 of the first radiator is 6mm, the distance h1 of the second radiator is 2mm, the distance h1 of the third radiator is 15mm, and other simulation parameters of the first radiator are respectively consistent with other simulation parameters of the second radiator and other simulation parameters of the third radiator. The first radiator, the second radiator and the third radiator are further provided with IPM (Intelligent Power Module), an insulated gate bipolar transistor and a diode for simulation test. Wherein, the result of the simulation test is as follows:

On the first radiator, the highest temperature of the first surface of the first radiator is 53 ℃, the highest temperatures of the power elements A1, A2, B1, B2, B3, C1, C2 and E are 45.2 ℃, 45.3 ℃, 100.2 ℃, 100.7 ℃, 100.1 ℃, 70.6 ℃, 70.7 ℃ and 45.4 ℃ respectively, the highest temperature of the contact surface of the intelligent power module and the first radiator is 88.8 ℃, the highest temperature of the contact surface of the insulated gate bipolar transistor and the first radiator is 89.4 ℃, and the highest temperature of the contact surface of the diode and the first radiator is 88.7 ℃.

On the second radiator, the highest temperature of the first surface of the second radiator is 52.2 ℃, the highest temperatures of the power elements A1, A2, B1, B2, B3, C1, C2 and E are 45.2 ℃, 100.6 ℃, 100.8 ℃, 100.4 ℃, 69.7 ℃, 69.8 ℃ and 45.4 ℃ respectively, the highest temperature of the contact surface of the intelligent power module and the second radiator is 89.2 ℃, the highest temperature of the contact surface of the insulated gate bipolar transistor and the second radiator is 89.4 ℃, and the highest temperature of the contact surface of the diode and the second radiator is 89 ℃.

On the third heat sink, the maximum temperature of the first surface of the third heat sink is 54.1 ℃, and the maximum temperatures of the power elements a1, a2, B1, B2, B3, C1, C2 and E are 45.4 ℃, 45.7 ℃, 101 ℃, 101.9 ℃, 100.9 ℃, 72.3 ℃ and 45.7 ℃ respectively; the highest temperature of the contact surface of the intelligent power module and the third radiator is 89.6 ℃, the highest temperature of the contact surface of the insulated gate bipolar transistor and the third radiator is 90.5 ℃, and the highest temperature of the contact surface of the diode and the third radiator is 89.6 ℃.

The simulation result can obtain: the maximum temperature difference of the power elements a1, a2, B1, B2, B3, C1, C2 and E on the first heat sink, the second heat sink and the third heat sink, respectively, is not large, so the distance h1 between the bottom of the heat sink 748 and the second surface 7422 of the heat dissipating body 742 has little influence on the overall temperature distribution of the heat sink 74. In the first heat sink, the heat dissipation performance of the smart power module, the igbt, and the diode is the best, and therefore, the distance h1 between the bottom of the heat dissipation groove 748 and the second surface 7422 of the heat dissipation body 742 is 6mm, which can improve the heat dissipation effect of the heat sink 74.

As shown in fig. 20, the height H of the heat dissipation body 742 is greater than H1+0.25D and less than or equal to H1+ D, wherein H1+0.25D indicates that the distance between the bottom of the heat dissipation groove 748 and the first surface 7421 of the heat dissipation body 742 is 0.25D; h1+ D indicates that the distance between the bottom of the heat dissipation groove 748 and the first surface 7421 of the heat dissipation body 742 is D, when the heat dissipation tube 743 is embedded in the heat dissipation body 742. For example, the height H of the heat dissipation body 742 may be greater than 0.25D +2mm and less than or equal to D +10 mm.

The heat dissipation body 742 of the present embodiment can set the height H of the heat dissipation body 742 by the distance H1 between the bottom of the heat dissipation groove 748 and the second surface 7422 of the heat dissipation body 742, which is convenient for designing the heat dissipation body 742. In addition, the distance h1 between the bottom of the heat dissipation groove 748 and the second surface 7422 of the heat dissipation body 742 is used to adjust the distance between the heat dissipation tube 743 and the power component 733 of the main board 73, thereby improving the heat dissipation effect of the heat dissipation tube 743 on the power component 733.

The heat dissipating body 742 has an inclined plane 7423, and the pins of the power component 733 of the motherboard 73 are disposed corresponding to the inclined plane 7423, so as to coat the pins of the power component 733 with moisture-proof oil or detect a bottom problem of the heat sink 74.

8. Radiating pipe with narrow space

As shown in fig. 20 and 21, the heat sink 74 includes a heat dissipation body 742 and a heat dissipation tube 743, and the first surface 7421 of the heat dissipation body 742 is provided with at least two heat dissipation grooves 748 side by side. The heat pipe 743 includes at least two main body portions 745, at least two bending portions 749 and at least one connecting portion 746, wherein the at least two main body portions 745 are disposed side by side and are respectively embedded in the corresponding heat dissipation grooves 748. At least two bent portions 749 are arranged side by side, one end of each bent portion 749 is connected to the corresponding main body portion 745, the other end of each bent portion 749 is connected to the corresponding connecting portion 746, and the at least two main body portions 745 are communicated with each other through the two bent portions 749 and the connecting portion 746.

The heat pipe 743 is described as including two body portions 745, two bent portions 749 and a connecting portion 746, that is, at least two body portions 745 include a first body portion 7451 and a second body portion 7452, the first body portion 7451 and the second body portion 7452 are arranged side by side, one end of the first body portion 7451 serves as an inlet of the heat pipe 743, and one end of the second body portion 7452 serves as an outlet of the heat pipe 743. The at least two bending portions 749 include a first bending portion 7491 and a second bending portion 7492, one end of the first bending portion 7491 is connected to the other end of the first main body portion 7451, one end of the second bending portion 7492 is connected to the other end of the second main body portion 7452, and the first bending portion 7491 and the second bending portion 7492 are disposed side by side. One end of the connecting portion 746 is connected to the other end of the first bending portion 7491, and the other end of the connecting portion 746 is connected to the other end of the second bending portion 7492. The term "side-by-side" in this application means spaced apart and not intersecting, e.g., the first body portion 7451 and the second body portion 7452 are disposed in parallel; or the first bending part 7491 and the second bending part 7492 are spaced apart from each other, and the first bending part 7491 and the second bending part 7492 do not intersect with each other.

In other embodiments, the heat dissipating tube 743 may include three or more main body portions 745, the number of the heat dissipating grooves 748 is the same as the number of the main body portions 745, the number of the connecting portions 746 is reduced by one from the number of the main body portions 745, and the number of the bending portions 749 is twice as large as the number of the connecting portions 746. For example, the heat pipe 743 includes three body portions 745, four bending portions 749, and two connecting portions 746.

Compared with the spacing distance w4 between the tube cores of the two main body portions 745 shown in fig. 19, which is greater than D, the at least two main body portions 745 of the present embodiment are communicated with each other through the bending portion 749 and the connecting portion 746, so the spacing distance w4 between the tube cores of the at least two main body portions 745 may be equal to D, that is, the spacing distance between the first main body portion 7451 and the second main body portion 7452 is 0, the heat dissipation tube 743 realizes a narrow-pitch design, and the volume of the heat sink 74 is reduced, so that the electronic control box 70 is miniaturized. The distance between the first body portion 7451 and the second body portion 7452 may be the distance between the outer tube of the first body portion 7451 and the outer tube of the second body portion 7452.

The connecting portion 746 is a U-shaped tube, i.e., a certain distance is provided between one end and the other end of the connecting portion 746, so that the distance between the first bent portion 7491 and the second bent portion 7492 is greater than the distance between the first main body portion 7451 and the second main body portion 7452, i.e., the distance between the at least two main body portions 745 is less than the distance between the at least two bent portions 749, and a narrow space can be achieved between the at least two main body portions 745 of the heat dissipation tube 743. In other embodiments, the separation distance between the first and

second body portions

7451, 7452 may be the separation distance w4 between the stylets of the at least two body portions 745.

The distance between the tube core of the other end of the at least two bending portions 749 and the center line 7461 of the corresponding connecting portion 746 is equal, that is, the distance between the tube core of the other end of the first bending portion 7491 and the center line 7461 is w6, the distance between the tube core of the other end of the second bending portion 7492 and the center line 7461 is w7, and the distance w6 is equal to the distance w7, so that the other ends of the two bending portions 749 are easily communicated with the connecting portion 746, and the processing difficulty is reduced.

Optionally, the bending angle of the bending portion 749 relative to the corresponding main body portion 745 is 85 ° -95 °, i.e., the bending angle of the first bending portion 7491 relative to the first main body portion 7451 is 85 ° -95 °, and the bending angle of the second bending portion 7492 relative to the second main body portion 7452 is 85 ° -95 °. The bent portion 749 has a 90 ° bending angle with respect to the corresponding main body portion 745, and is disposed in parallel to the first main body portion 7451 and the second main body portion 7452, and the other end of the first bent portion 7491 is disposed in parallel to the other end of the second bent portion 7492, so that the other end of the bent portion 749 is communicated with the connecting portion 746, thereby improving the efficiency.

As shown in fig. 18 and 22, the heat dissipating bracket 744 may be disposed on a first surface 7421 of the heat dissipating body 742, and the heat dissipating bracket 744 cooperates with the heat dissipating body 742 to press the heat dissipating tube 743 into the heat dissipating groove 748. The heat dissipation support 744 is provided with a hook 7441, and the hook 7441 is used for fixing a wire body of the electronic control box 70.

As shown in fig. 22, the hook 7441 includes a first hook 7442 and a second hook 7443, the first hook 7442 and the second hook 7443 are spaced from each other along the extending direction of the heat dissipating bracket 744, and form a wire collecting space with an opening, so that the wire body is arranged in the wire collecting space from the opening.

The opening direction of the first hook 7442 and the opening direction of the second hook 7443 are opposite to each other, so as to prevent the wire body from falling off from the openings. Optionally, the material of the first hook 7442 and the second hook 7443 is plastic.

The present application further provides a heat sink, which has the same structure as the heat sink 74, and is not described herein again.

The present application further provides an electric control box, the structure of which is the same as that of the electric control box 70, and is not described herein again.

In the description of the present application, it is to be understood that the terms "center", "width", "thickness", "upper", "lower", "left", "right", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the present application.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. An outdoor unit of an air conditioner, comprising:

the shell is used for defining a mounting cavity;

the electronic control box is arranged on the supporting part, and the supporting part is used for supporting the electronic control box;

a bottom through hole is formed in the bottom wall of the electric control box, a stepped groove is formed in one side, facing the electric control box, of the supporting portion, and the stepped groove and the bottom through hole are arranged oppositely, so that the supporting portion and the electric control box are matched to form a first air duct;

The side wall of the electric control box, which is far away from the second sub-installation cavity, is provided with a lateral through hole, the air conditioner outdoor unit further comprises a waterproof box, and the waterproof box cover is arranged on the lateral through hole and used for preventing liquid drops in the first sub-installation cavity from entering the electric control box through the lateral through hole;

the waterproof box and the side wall of the electric control box are matched to form a second air duct.

2. The outdoor unit of an air conditioner according to claim 1, wherein the stepped groove includes a first sub-groove body and a second sub-groove body, a depth of the second sub-groove body is greater than a depth of the first sub-groove body, and the second sub-groove body is disposed opposite to the bottom through hole of the electric control box and is communicated with the outside through the first sub-groove body.

3. The outdoor unit of claim 2, wherein a baffle is disposed at the bottom of the electric control box, and the baffle is located at a side of the bottom through hole facing the first sub-tank body and used for blocking liquid drops in the first air duct from entering the electric control box through the bottom through hole.

4. The outdoor unit of claim 2, wherein a drain hole is further formed at the bottom of the second sub-tank body.

5. An outdoor unit of an air conditioner as claimed in claim 1, wherein the supporting part and the electric control box are provided with a first positioning part and a second positioning part which are engaged with each other, so that the supporting part and the electric control box are assembled and positioned.

6. An outdoor unit of an air conditioner according to claim 1, wherein the waterproof box includes a slope panel spaced apart from the side wall of the electric control box and disposed opposite to the lateral through hole, the slope panel being disposed obliquely with respect to an axial line of the lateral through hole such that a space between the slope panel and the side wall of the electric control box is gradually decreased in a gravity direction, and an air outlet is formed between a lower end of the slope panel and the side wall of the electric control box; and an included angle between the extending direction of the inclined plane plate and the tangential direction of a position point, closest to the air outlet, of the impeller of the fan is 0-5 degrees.

7. The outdoor unit of claim 6, wherein the waterproof box further comprises a hem provided at a lower end of the slope panel, the hem being further bent toward the electronic control box than the slope panel, for blocking liquid droplets in the first sub-installation cavity from entering the electronic control box through the second air duct and the lateral through hole.

8. The outdoor unit of claim 1, further comprising a blower fan bracket formed by punching a plate material, disposed in the first sub-mounting cavity, the blower fan bracket comprising:

the bracket comprises a bracket main body and a bracket body, wherein the bracket main body comprises two upright posts which are arranged at intervals along a first direction and extend along a second direction, and the first direction and the second direction are arranged in a crossed manner;

the mounting frame body is arranged in the interval area between the two upright posts, is connected with the support main body and is used for mounting the fan;

wherein the upright post has a first width in the first direction, and a ratio between the first width and a plate thickness of the plate is in a range of 1-20.

9. The outdoor unit of claim 8, wherein the bracket body further comprises two cross members spaced apart from each other in the second direction and bridging between the two vertical poles in the first direction, the mounting bracket body is further disposed in a spaced area between the two cross members, the cross members have a second width in the second direction, and a ratio of the second width to the thickness of the plate material is in a range of 1 to 20.