Motor heat dissipation structure and oil smoke exhaust fan

Abstract

The utility model provides a motor heat dissipation structure and an oil smoke exhaust fan, and relates to the technical field of range hoods, the near end of the motor heat dissipation structure is connected with a motor, the motor heat dissipation structure comprises a heat dissipation inner cavity, a heat dissipation outer cavity, a cooling assembly and an air source, the near end of the heat dissipation inner cavity is open and faces the tail end of the motor; the heat dissipation outer cavity is located on the circumferential outer side of the heat dissipation inner cavity, and the heat dissipation outer cavity and the heat dissipation inner cavity are separated through a heat insulation piece; the cooling assembly is connected with the heat insulation piece and comprises a refrigeration part located in the heat dissipation inner cavity and a heat dissipation part located in the heat dissipation outer cavity. The air source is used for generating airflow flowing from the far end to the near end in the heat dissipation inner cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a motor heat dissipation structure and a range hood exhaust fan. Background Art

[0002] At present, the motors of commercial restaurant range hood fans are generally external, installed on the top or side of the fan housing, and covered by a rain cover. The motor housing generally has cooling fins, and a cooling fan is set outside the motor to dissipate heat during operation. The cooling fan can be controlled by an independent motor, or connected to the motor through a shaft and driven by the motor.

[0003] When commercial restaurant fume exhaust fans are in use, the power of the motor is often very large, and usually the temperature of the motor windings rises as the fan is used.

[0004] The existing heat dissipation mechanism only dissipates heat through a fan, and the heat dissipation capacity is obviously insufficient. Utility Model Content

[0005] The utility model aims to provide a motor heat dissipation structure and an oil fume exhaust fan to alleviate the technical problem of insufficient motor heat dissipation capacity of the existing oil fume exhaust fan.

[0006] In a first aspect, the utility model provides a motor heat dissipation structure, wherein the proximal end of the motor heat dissipation structure is connected to the motor, comprising:

[0007] A heat dissipation cavity, wherein the proximal end of the heat dissipation cavity is open and faces the rear end of the motor;

[0008] The heat dissipation outer cavity is located outside the heat dissipation inner cavity in the circumferential direction, and the heat dissipation outer cavity and the heat dissipation inner cavity are separated by a heat insulation member;

[0009] A cooling assembly, the cooling assembly is connected to the heat insulating member, and the cooling assembly includes a refrigeration part located in the heat dissipation inner cavity and a heat dissipation part located in the heat dissipation outer cavity;

[0010] The air source is used to generate an air flow from the far end to the near end in the heat dissipation cavity.

[0011] Further, the number of cooling components along the circumferential direction is at least two;

[0012] And / or, the number of cooling components along the direction from the distal end to the proximal end is at least two.

[0013] Furthermore, the heat dissipation cavity is arranged concentrically with the motor;

[0014] The overall outer diameter of the heat dissipation fins of the motor is consistent with the inner diameter of the heat dissipation cavity.

[0015] Furthermore, the heat dissipation outer cavity is annular and is arranged around the heat dissipation inner cavity.

[0016] Furthermore, the front end opening of the heat dissipation outer cavity is provided with a louver, which includes a plurality of blades, and the blades are inclined toward the circumferential outside from the distal end to the proximal end.

[0017] Furthermore, the air source can generate an airflow flowing from the distal end to the proximal end in the heat dissipation inner cavity and the heat dissipation outer cavity.

[0018] Furthermore, the air source includes fan blades arranged on the rear sides of the heat dissipation inner cavity and the heat dissipation outer cavity, and the fan blades fully or partially cover the rear end opening of the heat dissipation inner cavity; the fan blades fully or partially cover the rear end opening of the heat dissipation outer cavity.

[0019] Furthermore, the cross-sectional area ratio of the heat dissipation outer cavity to the heat dissipation inner cavity is 2:8.

[0020] In a second aspect, the utility model provides a range hood fan comprising a motor and the above-mentioned motor heat dissipation structure.

[0021] Furthermore, a temperature sensor is arranged inside the housing of the motor, and the temperature sensor is connected to the heat dissipation structure of the motor.

[0022] The utility model has at least the following advantages or beneficial effects:

[0023] The utility model provides a motor heat dissipation structure, in which the proximal end of the motor heat dissipation structure is connected to the motor, and comprises: a heat dissipation inner cavity, a heat dissipation outer cavity, a cooling component and an air source, wherein the proximal end of the heat dissipation inner cavity is open and faces the tail end of the motor; the heat dissipation outer cavity is located on the circumferential outside of the heat dissipation inner cavity, and the heat dissipation outer cavity and the heat dissipation inner cavity are separated by a heat insulating member; the cooling component is connected to the heat insulating member, and the cooling component comprises a refrigeration part located in the heat dissipation inner cavity and a heat dissipation part located in the heat dissipation outer cavity; the air source is used to generate an airflow flowing from the distal end to the proximal end in the heat dissipation inner cavity.

[0024] A cooling component is added to the heat dissipation structure. The refrigeration part of the cooling component is arranged in the heat dissipation inner cavity, and the heat dissipation part is arranged in the heat dissipation outer cavity. After the cooling component is working, the refrigeration part performs cooling, and the temperature of the surrounding air drops rapidly, thereby reducing the temperature of the airflow generated by the air source. After the cold airflow flows out from the front end of the heat dissipation inner cavity, it directly acts on the motor to quickly cool down the motor. The heat dissipation inner cavity and the heat dissipation outer cavity are separated by a heat insulating member. The heat generated by the heat dissipation part is located in the heat dissipation outer cavity, and has little effect on the heat dissipation inner cavity. In this embodiment, the motor is quickly cooled down by the refrigeration component, the motor can be well cooled, and the temperature rise momentum is controlled to reduce the failure rate; when the fan stops, the residual heat of the motor can be quickly dissipated to avoid aging of the internal environment and extend the service life. After abnormal conditions such as fan blocking occur, the motor can avoid overheating and burning, thereby reducing economic losses.

[0025] The oil fume exhaust fan provided by the utility model comprises a motor and the above-mentioned motor heat dissipation structure. Because the oil fume exhaust fan provided by the utility model adopts the above-mentioned motor heat dissipation structure, the oil fume exhaust fan provided by the utility model also has the advantages of the motor heat dissipation structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of a motor heat dissipation structure provided by an embodiment of the utility model;

[0028] Figure 2 A schematic diagram of a range fume exhaust fan provided in an embodiment of the utility model.

[0029] Icons: 100 - motor heat dissipation structure; 110 - heat dissipation inner cavity; 120 - heat dissipation outer cavity; 130 - refrigeration unit; 140 - heat dissipation unit; 150 - air source; 160 - blades; 170 - thermal insulation;

[0030] 200 - motor; 210 - cooling fins;

[0031] 300 - Temperature sensor. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] like Figure 1 As shown, the motor heat dissipation structure 100 provided by the present invention has a proximal end connected to the rear end (the end without a rotating shaft) of the motor 200 .

[0039] The motor heat dissipation structure 100 includes: a heat dissipation inner cavity 110, a heat dissipation outer cavity 120, a cooling assembly and an air source 150. The air source can be various types of fans such as centrifugal fans and cross-flow fans, or a power source is set at an external air flow nozzle, and the air flow generated by the nozzle enters the heat dissipation inner cavity 110.

[0040] The heat dissipation cavity 110 may be cylindrical and concentrically disposed with the motor 200. Of course, according to the different appearances of the motor 200, the shape of the heat dissipation cavity 110 may also be modified to be adaptable, so that the proximal opening of the heat dissipation cavity 110 corresponds to the cross-sectional profile of the motor 200. The proximal end of the heat dissipation cavity 110 is open and faces the rear end of the motor 200.

[0041] The heat dissipation outer cavity 120 may be annular and arranged around the circumferential outer side of the heat dissipation inner cavity 110 .

[0042] The heat dissipation outer cavity 120 and the heat dissipation inner cavity 110 are separated by a heat insulating member 170. The heat insulating member 170 is a tubular structure. In addition to forming a space separation, the heat insulating member 170 also has a certain heat insulation capacity. The heat dissipation inner cavity 110 is an overall heat preservation environment.

[0043] The cooling assembly is connected to the heat insulating member 170, and includes a refrigeration unit 130 located in the heat dissipation inner cavity 110 and a heat dissipation unit 140 located in the heat dissipation outer cavity 120. The working principle of the cooling assembly is similar to that of an air conditioner, and a semiconductor refrigeration block is provided between the refrigeration unit 130 and the heat dissipation unit 140, so as to achieve temperature reduction on one side of the refrigeration unit 130 and temperature increase on the other side of the heat dissipation unit 140.

[0044] The air source 150 is used to generate an airflow flowing from the distal end to the proximal end in the heat dissipation inner cavity 110. Furthermore, in order to reduce the use of components, the air source 150 can be configured to generate an airflow flowing from the distal end to the proximal end in the heat dissipation outer cavity 120, while dissipating heat for both the heat dissipation inner cavity 110 and the heat dissipation outer cavity 120.

[0045] In this embodiment, the air source 150 includes fan blades arranged on the rear sides of the heat dissipation inner cavity 110 and the heat dissipation outer cavity 120. The fan blades can be driven by an additional motor or by the motor of the range hood fan. The fan blades fully or partially cover the rear end opening of the heat dissipation inner cavity 110 and the rear end opening of the heat dissipation outer cavity 120, so that the airflow can enter the heat dissipation inner cavity 110 and the heat dissipation outer cavity 120 at the same time. In this way, part of the airflow generated by the air source 150 enters the heat dissipation inner cavity 110, and part of the airflow enters the heat dissipation outer cavity 120. The airflow entering the heat dissipation outer cavity 120 can cool the heat dissipation part 140 to ensure the normal operation of the cooling component. Of course, in other feasible schemes, the heat dissipation part 140 can also be cooled separately.

[0046] A cooling assembly is added to the heat dissipation structure. The refrigeration part 130 of the cooling assembly is arranged in the heat dissipation inner cavity 110, and the heat dissipation part 140 is arranged in the heat dissipation outer cavity 120. After the cooling assembly is working, the refrigeration part 130 performs refrigeration, and the temperature of the surrounding air drops rapidly, thereby reducing the temperature of the airflow generated by the air source 150. After the cold airflow flows out from the front end of the heat dissipation inner cavity 110, it directly acts on the motor 200 to quickly cool down the motor 200. The heat dissipation inner cavity 110 and the heat dissipation outer cavity 120 are separated by a heat insulation member 170. The heat generated by the heat dissipation part 140 is located in the heat dissipation outer cavity 120, and has little effect on the heat dissipation inner cavity 110. In this embodiment, the motor 200 is quickly cooled down by the refrigeration assembly, the motor 200 can be well cooled, and the temperature rise momentum is controlled to reduce the failure rate; when the fan stops, the residual heat of the motor 200 can be quickly dissipated, avoiding aging of the internal environment and extending the service life. After abnormal conditions such as fan blocking occur, the motor 200 can avoid overheating and burning, reducing economic losses.

[0047] In order to sufficiently cool the airflow in the heat dissipation cavity 110, the number of cooling components along the circumferential direction is at least two. Furthermore, the number of cooling components along the direction from the distal end to the proximal end can be at least two. This can increase the contact area between the airflow and the refrigeration part 130 and achieve rapid cooling.

[0048] The heat dissipation cavity 110 is concentrically arranged with the motor 200, and the overall outer diameter of the heat dissipation fins 210 of the motor 200 is consistent with the inner diameter of the heat dissipation cavity. The airflow blown out from the heat dissipation cavity 110 can directly act on the heat dissipation fins 210 of the motor 200 and fully contact with the heat dissipation fins 210 of the motor 200 to improve the heat dissipation efficiency.

[0049] The front end opening of the heat dissipation external cavity 120 is provided with a louver, which includes a plurality of blades 160 , and from the distal end to the proximal end, the blades 160 are inclined toward the circumferential outside.

[0050] The air flowing out of the heat dissipation cavity 120 has a high temperature after interacting with the heat dissipation portion 140. The blades 160 guide the airflow flowing out of the heat dissipation cavity 120, and guide the airflow to flow away from the motor 200 to prevent the hot air from affecting the heat dissipation of the motor 200. Specifically, the blade 160 may be inclined at an angle of 37° to the horizontal plane.

[0051] In order to better distribute the air volume of the heat dissipation air source 150 and achieve a good heat dissipation effect, the cross-sectional area ratio of the heat dissipation outer cavity 120 to the heat dissipation inner cavity 110 may be 2:8.

[0052] The power of the air source 150 should be selected based on whether the cold air from the heat dissipation cavity 110 completely covers the motor 200.

[0053] like Figure 1 and Figure 2As shown, the oil fume exhaust fan provided by the utility model includes a motor 200 and the above-mentioned motor heat dissipation structure 100. Because the oil fume exhaust fan provided by the utility model uses the above-mentioned motor heat dissipation structure 100, the oil fume exhaust fan provided by the utility model also has the advantages of the motor heat dissipation structure 100.

[0054] A temperature sensor 300 is provided inside the housing of the motor 200, and the temperature sensor 300 is connected to the motor heat dissipation structure 100. The temperature sensor 300 is installed inside the housing of the motor 200 outside the bearing of the motor 200, and is used to monitor the internal temperature of the motor 200. At the same time, the control mainboard in the central control box is also provided with a temperature sensor 300, which can measure the ambient temperature.

[0055] The motor 200 may be a three-phase asynchronous motor 200 .

[0056] The motor 200 is connected to the fan impeller in the fan housing through a pulley and a belt.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A motor heat dissipation structure, wherein the proximal end of the motor heat dissipation structure (100) is connected to a motor (200), characterized in that: include: A heat dissipation inner cavity (110), wherein the proximal end of the heat dissipation inner cavity (110) is open and faces the rear end of the motor (200); an external heat dissipation cavity (120), the external heat dissipation cavity (120) being located on the circumferential outside of the internal heat dissipation cavity (110), the external heat dissipation cavity (120) being separated from the internal heat dissipation cavity (110) by a heat insulating member (170); A cooling component, the cooling component being connected to the heat insulating member (170), the cooling component comprising a refrigeration part (130) located in the heat dissipation inner cavity (110) and a heat dissipation part (140) located in the heat dissipation outer cavity (120); An air source (150), the air source (150) being used to generate an airflow flowing from the distal end to the proximal end in the heat dissipation inner cavity (110).

2. The motor heat dissipation structure according to claim 1, characterized in that: The number of the cooling components along the circumferential direction is at least two; And / or, in the direction from the distal end to the proximal end, the number of the cooling components is at least two.

3. The motor heat dissipation structure according to claim 1, characterized in that: The heat dissipation inner cavity (110) is arranged concentrically with the motor (200); The overall outer diameter of the heat dissipation fins (210) of the motor (200) is consistent with the inner diameter of the heat dissipation inner cavity (110).

4. The motor heat dissipation structure according to claim 1, characterized in that: The heat dissipation outer cavity (120) is annular and is arranged around the heat dissipation inner cavity (110).

5. The motor heat dissipation structure according to claim 1, characterized in that: The front end opening of the heat dissipation external cavity (120) is provided with a louver, the louver comprising a plurality of blades (160), and from the distal end to the proximal end, the blades (160) are inclined toward the circumferential outside.

6. The motor heat dissipation structure according to claim 1, characterized in that: The air source (150) is capable of generating an airflow flowing from the distal end to the proximal end in the heat dissipation inner cavity (110) and the heat dissipation outer cavity (120).

7. The motor heat dissipation structure according to claim 6, characterized in that: The air source (150) comprises fan blades arranged at the rear sides of the heat dissipation inner cavity (110) and the heat dissipation outer cavity (120), wherein the fan blades fully or partially cover the rear end opening of the heat dissipation inner cavity (110); and the fan blades fully or partially cover the rear end opening of the heat dissipation outer cavity (120).

8. The motor heat dissipation structure according to claim 1, characterized in that: The cross-sectional area ratio of the heat dissipation outer cavity (120) to the heat dissipation inner cavity (110) is 2:

8.

9. A fume exhaust fan, characterized in that: It comprises a motor (200) and a motor heat dissipation structure (100) as claimed in any one of claims 1 to 8.

10. The oil fume exhaust fan according to claim 9, characterized in that: A temperature sensor (300) is arranged inside the housing of the motor (200), and the temperature sensor (300) is connected to the motor heat dissipation structure (100).

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