CN111456972A - Motor cooling mechanism, fan device and smoke ventilator - Google Patents

Abstract

The invention relates to a motor cooling mechanism, a fan device and a smoke exhaust ventilator, wherein the motor cooling mechanism comprises: a compressor for compressing a refrigerant; the condenser is communicated with a refrigerant outlet of the compressor and is used for allowing the refrigerant to exchange heat with air; and the evaporator is connected between the condenser and the compressor and is provided with a motor accommodating cavity for allowing the refrigerant and the motor to exchange heat. Above-mentioned motor cooling body can be arranged in cooling the motor among the smoke ventilator, motor holding chamber installation motor on through the evaporimeter, when motor operation drives the impeller rotation, the compressor also works, let in the condenser after compressing the refrigerant for high-temperature high-pressure gas, the air condensation heat transfer in condenser and the external environment that the condenser is located of high-temperature high-pressure refrigerant gas, get into the evaporimeter behind the low temperature liquid becomes, provide the cold source for the evaporimeter, low temperature refrigerant carries out the heat transfer through evaporimeter and motor simultaneously, take away the heat that produces when motor operation, prevent that the motor from generating heat, prevent the motor increase consumption.

Description

Motor cooling mechanism, fan device and smoke ventilator

Technical Field

The invention relates to the technical field of household appliances, in particular to a motor cooling mechanism, a fan device and a range hood.

Background

With the progress of society and the improvement of living standard of people, the range hood is widely applied to daily life of people. The cooking fume exhauster, also known as cooking fume exhauster, is a kitchen electrical appliance for purifying kitchen environment, and is mounted over the kitchen range, and can quickly exhaust away the waste material burned by the range and the oil fume harmful to human body produced in the cooking process, discharge the oil fume to the outside, and condense and collect the oil fume so as to purify the environment, reduce pollution and have the safety guarantee function of gas defense and explosion prevention.

When the range hood works, the motor is connected with a power supply to drive the wind wheel to rotate at a high speed, so that a negative pressure area is formed in a certain space range above the range hood, indoor oil smoke is sucked into the range hood, the oil smoke is subjected to first oil smoke separation through the oil net and then enters the air channel, the oil smoke is subjected to second oil smoke separation through the rotation of the wind wheel, the oil smoke in the air channel is acted by centrifugal force, oil mist is condensed into oil drops, and the oil drops are collected into the oil cup through an oil way.

However, the temperature of the motor inside the general range hood is rapidly increased along with the high-speed operation of the motor when the range hood works, and the range hood works in a high-temperature environment, so that the temperature of the motor is difficult to be effectively reduced through natural cooling in a short time, and the motor can be caused to continuously generate heat.

Disclosure of Invention

Accordingly, there is a need for a motor cooling mechanism, a fan device and a range hood to prevent the motor in the range hood from generating heat.

A motor cooling mechanism, comprising:

a compressor for compressing a refrigerant;

the condenser is communicated with a refrigerant outlet of the compressor and is used for allowing the compressed refrigerant to exchange heat with air;

and the evaporator is connected between the condenser and the compressor, is provided with a motor accommodating cavity and is used for allowing a refrigerant after heat exchange with air to exchange heat with a motor accommodated in the motor accommodating cavity.

The motor cooling mechanism can be used for cooling the motor in the smoke extractor, and the motor can be installed in the motor accommodating cavity on the evaporator. When the motor operation drives the impeller and rotates, the compressor also works, let in the condenser after compressing the refrigerant into the highly compressed gas of high temperature, the highly compressed refrigerant gas of high temperature in the condenser and the air condensation heat transfer in the external environment that the condenser is located, get into the evaporimeter after becoming low temperature liquid, provide the cold source for the evaporimeter, low temperature refrigerant carries out the heat transfer through evaporimeter and motor simultaneously, take away the heat that produces when the motor operation, prevent that the motor from generating heat, prevent motor increase consumption, avoid influencing the wholeness ability and the life of motor and cigarette machine.

In one embodiment, the evaporator includes a heat exchange tube and a plurality of fins stacked one on another, the plurality of fins having the motor accommodating cavity formed therethrough, and the heat exchange tube passes through the plurality of fins and is communicated between the condenser and the refrigerant inlet of the compressor.

In one embodiment, the heat exchange tube is bent back and forth along a direction parallel to the axis of the motor accommodating cavity and arranged in a circular ring shape around the circumference of the motor accommodating cavity.

In one embodiment, a bracket mounting groove is reserved on the evaporator, extends along the radial direction of the motor accommodating cavity, and is communicated between the motor accommodating cavity and the outside.

In one embodiment, the evaporator includes a first sub-evaporator and a second sub-evaporator, the bracket mounting groove is formed between the first sub-evaporator and the second sub-evaporator, and the first sub-evaporator and the second sub-evaporator respectively have a first sub-motor accommodating cavity and a second sub-motor accommodating cavity both communicated with the bracket mounting groove.

A fan device comprises a motor, a wind wheel and the motor cooling mechanism, wherein the motor is contained in a motor containing cavity of an evaporator, and the wind wheel is connected with the output end of the motor.

In one embodiment, the wind turbine further comprises a volute, wherein an air suction cavity and an air exhaust duct which are communicated with each other are formed in the volute, the motor, the evaporator and the wind wheel are all contained in the air suction cavity, and the motor is connected to the volute in a matching mode.

In one embodiment, the evaporator further comprises an installation frame, a support installation groove is reserved on the evaporator, one end of the installation frame is embedded in the support installation groove and sleeved outside the motor, and the other end of the installation frame extends out of the air suction cavity and is connected with the volute in a matching mode.

In one embodiment, the condenser is disposed at an outlet of the exhaust duct, and a refrigerant in the condenser exchanges heat with an airflow flowing out of the outlet.

In one embodiment, the motor cooling mechanism further includes an outer casing and a fan, the condenser is disposed in the outer casing, and the fan is disposed on the outer casing and drives an external airflow to flow through the condenser.

In one embodiment, the compressor is mounted within the outer casing.

A range hood comprises the fan device.

Drawings

Fig. 1 is a schematic structural diagram of a range hood according to an embodiment of the present invention;

FIG. 2 is an exploded view of the range hood of FIG. 1;

figure 3 is a schematic view of the fan unit of the smoke extractor of figure 1;

FIG. 4 is a schematic view of a cooling mechanism of the motor of the blower apparatus shown in FIG. 3;

FIG. 5 is a schematic view of the evaporator of the motor cooling mechanism of FIG. 4;

FIG. 6 is a schematic view of the evaporator shown in FIG. 5;

FIG. 7 is an exploded view of a range hood according to another embodiment of the present invention;

fig. 8 is a schematic view of the fan unit of the range hood of fig. 7.

100. A range hood; 10. a housing; 11. an air duct; 12. an air outlet; 30. a fan device; 32. a volute; 321. a suction chamber; 323. an exhaust duct; 34. a mounting frame; 40. a motor; 50. a wind wheel; 60. a motor cooling mechanism; 62. a compressor; 64. a condenser; 66. an evaporator; 661. a heat sink; 662. a motor accommodating cavity; 663. a heat exchange pipe; 664. a bracket mounting groove; 665. a first sub-evaporator; 666. a second sub-evaporator; 67. an outer casing.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

For example, fig. 1 shows a schematic structural diagram of a range hood 100 according to an embodiment of the invention; fig. 2 is an exploded view of the range hood shown in fig. 1.

Referring to fig. 1-2, an embodiment of the present invention provides a range hood 100, which includes a housing 10 and a fan device 30, wherein an air duct 11 is formed in the housing 10, and the housing 10 is further provided with an air inlet (not shown) and an air outlet 12 both communicating with the air duct 11. The blower device 30 is used for generating negative pressure in the air duct 11, so that air flows from the air inlet to the air outlet 12. Specifically, the range hood 100 further includes an oil screen (not shown) mounted at the air inlet, and the fan device 30 includes a motor 40 and a wind wheel 50 mounted in the air duct 11. When the oil fume separation device works, the fan device 30 acts to generate negative pressure to suck indoor oil fume, the oil fume is subjected to first oil fume separation through the oil mesh and then enters the air duct 11, the oil fume is subjected to second oil fume separation through the rotation of the wind wheel 50, the oil fume in the air duct 11 is acted by centrifugal force, and the oil fume is condensed into oil drops to be collected into the oil cup.

In an embodiment, the range hood 100 may be a top-suction range hood, or may be another range hood, such as a side-suction range hood, which is not limited herein.

The technical solution of the present invention will be described in detail below by taking a ceiling-type range hood as an example. The present embodiment is merely exemplary and does not limit the technical scope of the present invention. In addition, the drawings in the embodiments omit unnecessary components and clearly show the technical features of the invention.

Illustratively, fig. 2 shows an exploded schematic view of a range hood 100 in one embodiment of the invention; figure 3 is a schematic diagram of the construction of the fan unit 30 within the range hood 100 of figure 2; fig. 4 is a schematic structural diagram of a motor cooling mechanism 60 in the fan device 30 shown in fig. 3;

in some embodiments, the fan device 30 further includes a motor cooling mechanism 60, and the motor cooling mechanism 60 is configured to transfer a cold source to the motor 40, so that the motor 40 running at a high speed can be effectively cooled, and the motor 40 is prevented from generating heat to affect performance and service life of the motor 40.

The motor cooling mechanism 60 comprises a compressor 62, a condenser 64 and an evaporator 66, wherein the compressor 62 is used for compressing a refrigerant, and the condenser 64 is communicated with a refrigerant outlet of the compressor 62 and used for allowing the compressed refrigerant to exchange heat with air; the evaporator 66 is connected between the condenser 64 and the compressor 62, and has a motor accommodating chamber 662 for allowing a refrigerant heat-exchanged with air to exchange heat with the motor 40 accommodated in the motor accommodating chamber 662. Like this, can install motor 40 through motor holding chamber 662 on the evaporimeter 66, when motor 40 operation drive impeller rotation, compressor 62 also works, let in condenser 64 after compressing the refrigerant into the highly compressed gas of high temperature, the highly compressed refrigerant gas of high temperature in condenser 64 and the air condensation heat transfer in the external environment of condenser 64 place, get into evaporimeter 66 behind the low temperature liquid become, provide the cold source for evaporimeter 66, the low temperature refrigerant carries out the heat transfer through evaporimeter 66 and motor 40 simultaneously, take away the heat that produces when motor 40 moves, prevent that motor 40 from generating heat, prevent that motor 40 from increasing the consumption, avoid influencing the wholeness and the life of motor 40 and cigarette machine.

That is to say, the evaporator 66 is sleeved outside the motor 40, and heat generated by the motor 40 during operation can be absorbed by the refrigerant in the evaporator 66, thereby cooling the motor 40. Moreover, the refrigerant in the evaporator 66 absorbs heat and then enters the compressor 62, and is compressed by the compressor 62 to become high-temperature high-pressure gas, then the high-temperature high-pressure gas enters the condenser 64, exchanges heat with the outside air and is condensed into low-temperature liquid, and finally the low-temperature liquid enters the evaporator 66 again to exchange heat with the motor 40, so as to circularly absorb the heat generated by the motor 40.

Optionally, the motor cooling mechanism 60 further includes a throttling element, the throttling element is disposed between the condenser 64 and the evaporator 66, and the low-temperature high-pressure liquid flowing out from the condenser 64 is throttled into low-temperature low-pressure liquid by the throttling element, and then enters the evaporator 66 for evaporation and heat exchange.

Illustratively, fig. 4 is a schematic structural diagram of a motor cooling mechanism 60 in the fan apparatus 30 according to an embodiment of the present invention; FIG. 5 is a schematic view of the evaporator 66 of the motor cooling mechanism 60 of FIG. 4; FIG. 6 is a schematic view of the evaporator 66 shown in FIG. 5;

referring to fig. 4-6, the evaporator 66 further includes a heat exchange tube 663 and a plurality of fins 661, each of the fins 661 is provided with a through hole, the plurality of fins 661 are stacked and all the through holes are communicated to form a motor accommodating chamber 662, and the heat exchange tube 663 passes through the plurality of fins 661 and is communicated between the condenser 64 and the refrigerant inlet of the compressor 62. Therefore, the plurality of radiating fins 661 are stacked, the plurality of through holes in the plurality of radiating fins 661 are communicated to form the motor accommodating cavity 662, the heat exchange tube 663 penetrates through the plurality of radiating fins 661, and after a low-temperature refrigerant enters the heat exchange tube 663, the cold source can be conducted to the radiating fins 661, and then the cold source is transferred to the motor 40 surrounded by the radiating fins 661, so that the motor 40 is cooled, and the motor 40 is prevented from heating.

Specifically, heat exchange tube 663 is bent to and fro along the direction parallel to the axis of motor accommodating cavity 662, and is arranged in a circular ring shape around the circumference of motor accommodating cavity 662, so that heat exchange tube 663 bent in a circular ring shape is arranged outside motor 40, so that motor 40 can be cooled in the whole circumference, and a uniform cooling effect is provided for motor 40.

Further, the fan device 30 further includes a volute 32, an air suction cavity 321 and an exhaust duct 323 which are communicated with each other are formed in the volute 32, the motor 40, the evaporator 66 and the wind wheel 50 are all accommodated in the air suction cavity 321, the motor 40 is connected to the volute 32 in a matching manner, the motor 40 is supported in the air suction cavity 321 through the volute 32, and the motor 40 drives the impeller to rotate.

Referring to fig. 2-3 again, further, the fan device 30 further includes a mounting bracket 34, a bracket mounting groove 664 is reserved on the evaporator 66, one end of the mounting bracket 34 is embedded in the bracket mounting groove 664 and sleeved outside the motor 40, and the other end of the mounting bracket 34 extends out of the suction cavity 321 and is connected with the volute 32 in a matching manner, so that the mounting bracket 34 and the volute 32 are conveniently assembled and connected from the outside of the volute 32. One end of the mounting bracket 34 is fixedly connected to the outer side wall of the volute 32, and the other end of the mounting bracket 34 extends into the air suction cavity 321 and provides a mounting base for the motor 40. Moreover, in order to prevent the evaporator 66 sleeved outside the motor 40 from interfering with the mounting bracket 34, a bracket mounting groove 664 is reserved on the evaporator 66, and at least a portion of one end of the mounting bracket 34 extending into the air suction cavity 321 can be embedded in the bracket mounting groove 664 and contact with the outer wall of the motor 40 to support the motor 40.

Optionally, a bracket mounting groove 664 is reserved on the evaporator 66, and the bracket mounting groove 664 extends in the radial direction of the motor accommodating cavity 662 and is communicated between the motor accommodating cavity 662 and the outside. The motor accommodating cavity 662 is used for assembling the motor 40, and the radial direction of the motor accommodating cavity 662 is consistent with the radial direction of the motor 40 in the motor accommodating cavity 662. Thus, the mounting bracket 34 can extend into the bracket mounting slot 664 from the outside and into mating contact with the motor 40 to support the motor 40.

Referring to fig. 4 to 6 again, in particular, the evaporator 66 includes a first sub-evaporator 665 and a second sub-evaporator 666, a bracket mounting groove 664 is formed between the first sub-evaporator 665 and the second sub-evaporator 666, and the first sub-evaporator 665 and the second sub-evaporator 666 respectively have a first sub-motor accommodating cavity and a second sub-motor accommodating cavity which are both communicated with the bracket mounting groove 664. That is, the bracket mounting groove 664 is formed by spacing the first sub-evaporator 665 and the second sub-evaporator 666, and interference between the evaporator 66 and the mounting bracket 34 is prevented. Meanwhile, the first sub motor accommodating chamber and the second sub motor accommodating chamber are communicated with each other to form a motor accommodating chamber 662 for assembling the motor 40.

The first sub-evaporator 665 and the second sub-evaporator 666 are both arranged as in the above embodiments, the first sub-evaporator 665 includes a plurality of stacked first fins and a first heat exchange tube penetrating the plurality of first fins, the second sub-evaporator 666 includes a plurality of stacked second fins and a second heat exchange tube penetrating the plurality of second fins, and the first heat exchange tube and the second heat exchange tube are communicated with each other to allow a refrigerant to flow between the first sub-evaporator 665 and the second sub-evaporator 666. Moreover, a gap is reserved between the first cooling fins and the second cooling fins to form a bracket mounting groove 664, so that the mounting bracket 34 is conveniently sleeved on the periphery of the motor 40.

For example, fig. 1-3 illustrate a schematic structural diagram of a fan device 30 according to an embodiment of the present invention.

Referring to fig. 1-3, in the blower device 30 according to the embodiment of the present invention, the condenser 64 is disposed at the outlet of the exhaust duct 323 of the volute 32, and the refrigerant in the condenser 64 exchanges heat with the airflow flowing out of the outlet. The high-speed fluid in the exhaust duct 323 of the volute 32 flows through the condenser 64 and is then discharged to the outside, so that the high-speed fluid in the volute 32 can exchange heat with the high-temperature refrigerant in the condenser 64, and the high-temperature refrigerant in the condenser 64 is condensed into a low-temperature liquid refrigerant. In this manner, no additional fan is required to create the airflow through the condenser 64 and the overall construction of the fan assembly 30 is simpler.

Fig. 7-8 illustrate a schematic structural view of a fan apparatus 30 according to another embodiment of the present invention.

Referring to fig. 7-8, the blower device 30 according to another embodiment of the present invention further includes an outer casing 67 and a fan (not shown), wherein the condenser 64 is disposed in the outer casing 67, and the fan is disposed on the outer casing 67 and drives an external airflow to flow through the condenser 64. The condenser 64 and fan are mounted to the outer housing 67 to form an external unit that is integrally mounted to the housing 10 of the range hood 100. In this way, the fan inside the external machine drives the airflow to flow through the condenser 64, so that the refrigerant inside the condenser 64 is subjected to condensation heat exchange, the heat exchange of the condenser 64 is not required to be carried out by the airflow inside the volute 32 in the range hood 100, and the wind resistance when the airflow inside the volute 32 is discharged outwards is not increased.

Alternatively, the compressor 62 is mounted in the outer casing 67, such that the compressor 62, the fan and the condenser 64 are integrally mounted in the outer casing 67 to form an outdoor unit. In the process of assembling the fan device 30, the evaporator 66 is firstly sleeved outside the motor 40, then the outer unit is integrally assembled on the shell 10 of the range hood 100 and communicated with the compressor 62, the evaporator 66 and the condenser 64, the compressor 62 and the condenser 64 do not need to be respectively and independently assembled on the shell 10 of the range hood, the integration level is higher, and the assembly is more convenient.

Based on the same inventive concept, in an embodiment of the present invention, the fan device 30 includes a motor 40, a wind wheel 50 and a motor cooling mechanism 60, wherein the wind wheel 50 is assembled at an output end of the motor 40, and when the motor 40 operates, the wind wheel 50 is driven to rotate, so as to generate a negative pressure that drives an airflow to enter the range hood 100. And, the motor cooling mechanism 60 is at least partially sleeved outside the motor 40 and used for transferring a cold source to the motor 40, so that the motor 40 running at a high speed can be effectively cooled, and the motor 40 is prevented from heating to influence the performance and the service life of the motor 40.

The motor cooling mechanism 60 includes a compressor 62, a condenser 64 and an evaporator 66, the compressor 62 is used for compressing a refrigerant, and the condenser 64 is communicated with a refrigerant outlet of the compressor 62 and used for allowing the refrigerant to exchange heat with air; the evaporator 66 is connected between the condenser 64 and the compressor 62, and has a motor receiving chamber 662 for allowing the refrigerant to exchange heat with the motor 40. Like this, can install motor 40 through motor holding chamber 662 on the evaporimeter 66, when motor 40 operation drive impeller rotation, compressor 62 also works, let in condenser 64 after compressing the refrigerant into the highly compressed gas of high temperature, the highly compressed refrigerant gas of high temperature in condenser 64 and the air condensation heat transfer in the external environment of condenser 64 place, get into evaporimeter 66 behind the low temperature liquid become, provide the cold source for evaporimeter 66, the low temperature refrigerant carries out the heat transfer through evaporimeter 66 and motor 40 simultaneously, take away the heat that produces when motor 40 moves, prevent that motor 40 from generating heat, prevent that motor 40 from increasing the consumption, avoid influencing the wholeness and the life of motor 40 and cigarette machine.

The fan device 30 further includes the above-mentioned scroll 32, the mounting bracket 34, and other elements, and the structure and the assembly relationship of each element are as described in the above-mentioned embodiments, which are not described herein again.

Based on the same inventive concept, in an embodiment of the present invention, the cooling device for the motor 40 is further provided, and is used for transferring a cold source to the motor 40, preventing the motor 40 from generating heat during the operation process, and improving the comprehensive performance and the service life of the motor 40.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (12)

1. A motor cooling mechanism, comprising:

a compressor (62) for compressing a refrigerant;

the condenser (64) is communicated with a refrigerant outlet of the compressor (62) and is used for allowing the compressed refrigerant to exchange heat with air;

and an evaporator (66) connected between the condenser (64) and the compressor (62), and having a motor accommodating chamber (662) for allowing a refrigerant heat-exchanged with air to exchange heat with the motor (40) accommodated in the motor accommodating chamber (662).

2. The motor cooling mechanism according to claim 1, wherein the evaporator (66) comprises a heat exchange tube (663) and a plurality of cooling fins (661), each cooling fin (661) is provided with a through hole, the plurality of cooling fins (661) are stacked and all the through holes are communicated to form the motor accommodating cavity (662); the heat exchange tube (663) penetrates through the plurality of radiating fins (661) and is communicated between the condenser (64) and a refrigerant inlet of the compressor (62).

3. The motor cooling mechanism according to claim 2, wherein the heat exchanging pipe (663) is bent back and forth in a direction parallel to an axis of the motor accommodating chamber (662) and is arranged in a circular ring shape around a circumference of the motor accommodating chamber (662).

4. The motor cooling mechanism according to any one of claims 1 to 3, wherein a bracket mounting groove (664) is reserved on the evaporator (66), and the bracket mounting groove (664) extends in a radial direction of the motor accommodating chamber (662) and communicates the motor accommodating chamber (662) with the outside.

5. The motor cooling mechanism according to claim 4, wherein the evaporator (66) includes a first sub-evaporator (665) and a second sub-evaporator (666), the rack mounting groove (664) is formed between the first sub-evaporator (665) (66) and the second sub-evaporator (666), and the first sub-evaporator (665) and the second sub-evaporator (666) have a first sub-motor receiving cavity and a second sub-motor receiving cavity, respectively, each communicating with the rack mounting groove (664).

6. A fan device, comprising a motor (40), a wind wheel (50) and the motor cooling mechanism of any one of claims 1 to 5, wherein the motor (40) is accommodated in the motor accommodating cavity (662) of the evaporator (66), and the wind wheel (50) is connected with the output end of the motor (40).

7. The fan device according to claim 6, further comprising a volute (32), wherein a suction chamber (321) and an exhaust duct (323) are formed in the volute (32) and are communicated with each other, the motor (40), the evaporator (66) and the wind wheel (50) are accommodated in the suction chamber (321), and the motor (40) is coupled to the volute (32).

8. The fan device according to claim 7, further comprising a mounting bracket (34), wherein a bracket mounting groove (664) is reserved on the evaporator (66), one end of the mounting bracket (34) is embedded in the bracket mounting groove (664) and sleeved outside the motor (40), and the other end of the mounting bracket (34) extends out of the air suction cavity (321) and is connected with the volute (32) in a matching manner.

9. The fan apparatus as claimed in claim 7, wherein the condenser (64) is disposed at an outlet of the exhaust duct (323), and a refrigerant in the condenser (64) exchanges heat with an airflow flowing out of the outlet.

10. The fan apparatus according to claim 7, wherein the motor cooling mechanism further comprises an outer housing (67), the condenser (64) is disposed in the outer housing (67), and the fan is disposed on the outer housing (67) and drives the outside air flow through the condenser (64).

11. The fan arrangement according to claim 10, wherein the compressor (62) is fitted within the outer casing (67).

12. A range hood comprising a fan assembly according to any one of claims 6 to 11.

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