Low-temperature-resistant fan motor

Abstract

The utility model provides a low-temperature-resistant fan motor, which relates to the technical field of low-temperature-resistant motors, and is characterized in that a sleeve is of a structure with an open front end and a sealed tail end, and an electric heating tube is inserted into each sleeve; a circle of L-shaped air guide pipe is welded on the tail end blocking plate of the circle of sleeve in a surrounding manner; an air collecting cover is welded between the tail ends of the circle of L-shaped air guide pipe; an air guide hole is formed in a rotor rotating shaft of the motor in a penetrating mode, a short connecting pipe is welded to the tail end of the air guide hole, an air suction cover of a conical structure is welded to the head end of the short connecting pipe, an extension ring is welded to the head end of the air suction cover, and an air suction impeller is welded to the interior of the extension ring. The stator and the rotor of the motor can be heated, the situation that the rotor cannot be normally operated or damaged in a low-temperature environment due to the lack of special corresponding temperature rise heating measures is avoided, and compared with the prior art, the whole motor can be relatively comprehensively and effectively heated, and the low-temperature resistance of the whole motor can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature resistant motors, in particular to a low-temperature resistant fan motor. Background Art

[0002] Low temperature resistant fan motor is a motor that can work normally in a low temperature environment. It is usually used in equipment that needs to operate in cold conditions, such as refrigeration equipment, industrial applications in extremely cold areas, refrigerated transport vehicles, and various ventilation and cooling systems that need to work stably in a low temperature environment.

[0003] Most existing motors simply have a heating mechanism on the outer shell to cope with low temperatures, but most lack a corresponding heating mechanism on the rotor. The heating mechanism on the outer shell is close to the stator installed on the inner wall of the outer shell, which has a better heating and cold-proof effect on the stator, but is separated from the rotor by a certain distance, which has a poor heating and cold-proof effect on the rotor, causing the rotor to be unable to operate normally or be damaged in a low-temperature environment, affecting the overall low-temperature resistance of the motor;

[0004] In addition, although some motors are equipped with a heating mechanism on the rotor, the two sets of heating mechanisms on the rotor and the housing will complicate the overall structure of the motor and increase the electric energy consumed by the motor to heat up and keep warm. Utility Model Content

[0005] In view of this, the utility model provides a low temperature resistant fan motor to solve the problem that the two sets of heating mechanisms on the rotor and the housing will complicate the overall structure of the motor and increase the electric energy consumed by the motor for heating and keeping warm.

[0006] The technical solution proposed by the utility model is: a low temperature resistant fan motor, specifically comprising: a motor, wherein a sleeve is arranged around the circumferential shell wall of the motor;

[0007] The sleeve is a structure with an open front end and a blocked rear end, and an electric heating tube is inserted and installed in each sleeve; a circle of L-shaped air ducts is welded around the rear end blocking plate of a circle of the sleeve, and an air collecting cover is welded between the rear ends of the circle of L-shaped air ducts;

[0008] An air guide hole is formed inside the rotor shaft of the motor, a short pipe is welded to the tail end of the air guide hole, a conical air suction cover is welded to the head end of the short pipe, an extension ring is welded to the head end of the air suction cover, and an exhaust impeller is welded inside the extension ring;

[0009] The cross section of the wind collecting cover is a U-shaped structure, and the extension ring is inserted into the tail end opening part of the wind collecting cover and rotatably matched with the tail end opening part of the wind collecting cover.

[0010] Furthermore,

[0011] A rotating gap is maintained between the extension ring and the circumferential side wall of the air collecting hood.

[0012] Furthermore,

[0013] A circular end cap is fixedly arranged at the head end portion of the electric heating tube, and a threaded sleeve is fixedly arranged on one side of the circular end cap facing the sleeve. The threaded sleeve is screwed and matched with the head end portion of the sleeve.

[0014] Furthermore,

[0015] When the threaded sleeve is screwed and matched with the sleeve, the circular end cap is locked and blocked at the head end opening of the sleeve.

[0016] Furthermore,

[0017] A circle of air inlet holes is circumferentially formed in the portion of the circular end cap between the electric heating tube and the threaded sleeve.

[0018] Furthermore,

[0019] A circle of semi-circular grooves is circumferentially formed in the circumferential shell wall of the motor.

[0020] Furthermore,

[0021] A circle of the sleeves is correspondingly welded inside a circle of the semi-circular grooves.

[0022] A low-temperature resistant fan motor provided by the present utility model has the following beneficial effects:

[0023] 1. Both the stator and the rotor of the motor can be heated and warmed up, avoiding the situation that the rotor lacks a dedicated corresponding temperature rise heating measure, resulting in abnormal operation or damage in a low-temperature environment. Compared with the prior art, the whole motor can be heated relatively comprehensively and effectively, which helps to ensure the overall low-temperature resistance performance of the motor.

[0024] 2. The rotor and the stator of the motor share a circle of electric heating tubes to implement heating and warming up, which can save the need to separately configure a set of electric heating tubes for the rotor and the stator. Compared with the prior art, it helps to simplify the overall structure of the motor and reduce the electric energy consumed by the motor for heating and warming up to resist cold.

[0025] 3. The air extraction impeller, as a component for pumping hot air into the air guide holes, is driven by the rotor shaft, which saves the need to separately configure a driving motor for the air extraction impeller, helping to reduce the cost of the motor for implementing the function of heating and warming up to resist cold. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below.

[0027] The accompanying drawings in the following description relate only to some embodiments of the present utility model and do not limit the present utility model.

[0028] In the accompanying drawings, the length direction of the motor is defined as the front-back direction.

[0029] Figure 1 The schematic diagram of the overall front-side structure of the present utility model is shown;

[0030] Figure 2 The schematic diagram of the overall back-side structure of the present utility model is shown;

[0031] Figure 3 The schematic diagram of the inner structure of the air collecting hood of the present utility model in a half-section view is shown;

[0032] Figure 4 The schematic diagram of the inner structure of the sleeve of the present utility model in a half-section view is shown;

[0033] Figure 5 The schematic diagram of the disassembly state of the electric heating tube of the present utility model is shown;

[0034] Figure 6 The schematic diagram of the inner structure of the threaded sleeve of the present utility model in a half-section view is shown.

[0035] List of reference numerals:

[0036] 1. Motor; 101. Semi-circular groove; 102. Rotor shaft; 1021. Short connecting pipe; 1022. Air suction hood; 1023. Air extraction impeller;

[0037] 2. Sleeve; 201. L-shaped air duct; 202. Air collecting hood;

[0038] 3. Electric heating tube; 301. Circular plug; 302. Threaded sleeve; 303. Air inlet hole. Detailed implementation manners

[0039] To make the purpose, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0040] Please refer to Figures 1 to 6 ;

[0041] Embodiment 1:

[0042] The present utility model provides a low-temperature resistant fan motor, including: a motor 1, and a sleeve 2 is arranged around the circumferential shell wall of the motor 1;

[0043] The sleeve 2 has a structure with an open front end and a sealed tail end, and an electric heating tube 3 is inserted and installed in each sleeve 2; a circular L-shaped air duct 201 is welded around the tail end plug plate of the circular sleeve 2, and a wind collecting cover 202 is welded between the tails of the circular L-shaped air ducts 201;

[0044] The electric heating tube 3 can heat the outer shell of the motor 1, raise the temperature of the stator installed on the inner wall of the outer shell of the motor 1, and warm up the stator to resist cold;

[0045] A vent hole is formed through the interior of the rotor shaft 102 of the motor 1. A short connecting pipe 1021 is welded to the tail end of the vent hole, a conical suction hood 1022 is welded to the head end of the short connecting pipe 1021, an extension ring is welded to the head end of the suction hood 1022, and an exhaust impeller 1023 is welded inside the extension ring;

[0046] The cross-section of the wind collecting cover 202 is in a U-shaped structure, and the extension ring is inserted into the tail end opening part of the wind collecting cover 202 and is rotationally matched with the tail end opening part of the wind collecting cover 202;

[0047] When the rotor shaft 102 rotates, it can drive the exhaust impeller 1023 to rotate together. When the exhaust impeller 1023 rotates, it can suck and deliver the air inside the wind collecting cover 202 into the vent hole and form a negative pressure inside the wind collecting cover 202. Under the action of the negative pressure suction force inside the wind collecting cover 202, the hot air heated by the electric heating tube 3 inside the circular sleeve 2 is sucked into the wind collecting cover 202 through the circular L-shaped air duct 201, and continuously sucked and delivered into the vent hole by the exhaust impeller 1023. When the hot air flows through the vent hole, it can heat the rotor shaft 102 and the rotor, warm up the whole stator, and thus the stator and rotor of the motor 1 can be heated and raised in temperature, avoiding the lack of a special corresponding temperature rise heating measure for the rotor, resulting in the inability to operate normally or damage in a low-temperature environment. Compared with the prior art, the whole motor 1 can be heated relatively comprehensively and effectively, which helps to ensure the low-temperature resistance performance of the whole motor 1;

[0048] The rotor and stator of the motor 1 share a circular electric heating tube 3 to implement heating and temperature rise, which can save the need to configure a set of electric heating tubes 3 for the rotor and stator respectively. Compared with the prior art, it helps to simplify the overall structure of the motor 1 and reduce the electric energy consumed by the motor 1 for heating and warming up to resist cold;

[0049] The exhaust impeller 1023, as a component for pumping hot air into the vent hole, is driven by the rotor shaft 102, which saves the need to configure an additional drive motor for the exhaust impeller 1023, helping to reduce the cost of the motor 1 for implementing the heating and warming up to resist cold function.

[0050] Preferably,

[0051] A rotating gap is maintained between the circumferential side wall of the extension ring and the air collecting hood 202;

[0052] The rotating gap can prevent excessive relative wear caused by direct rotational contact between the extension ring and the air collecting hood 202;

[0053] It should be noted that: since the rotating gap has a pressure relief effect on the negative pressure inside the air collecting hood 202, the rotating gap should be reduced as much as possible. While avoiding contact wear between the extension ring and the air collecting hood 202, the pressure relief effect should be minimized as much as possible to ensure that there is sufficient negative pressure suction inside the air collecting hood 202 to normally suck the hot air inside the set of sleeves 2, and to ensure the normal and effective implementation of the heating and temperature rising function for the rotor.

[0054] On the basis of Embodiment 1, Embodiment 2:

[0055] A circular plug 301 is fixedly arranged at the head end part of the electric heating tube 3, and a threaded sleeve 302 is fixedly arranged on one side of the circular plug 301 facing the sleeve 2, and the threaded sleeve 302 is screwed and matched with the head end part of the sleeve 2.

[0056] Preferably,

[0057] When the threaded sleeve 302 is screwed and matched with the sleeve 2, the circular plug 301 is locked and blocked at the head end opening of the sleeve 2.

[0058] Preferably,

[0059] A circle of air inlet holes 303 is circumferentially formed in the part of the circular plug 301 located between the electric heating tube 3 and the threaded sleeve 302;

[0060] When the air collecting hood 202 performs negative pressure suction on the hot air inside the set of sleeves 2, the low-temperature cold air outside enters the set of sleeves 2 through the circle of air inlet holes 303 to supplement the hot air that has been sucked away, and the low-temperature cold air outside is heated by the circle of electric heating tubes 3 when entering the set of sleeves 2. In this way, hot air can be continuously produced in the set of sleeves 2 for continuous suction use by the air collecting hood 202.

[0061] Preferably,

[0062] A circle of semi-circular grooves 101 is circumferentially formed on the circumferential shell wall of the motor 1.

[0063] Preferably,

[0064] A set of sleeves 2 is correspondingly welded inside the circle of semi-circular grooves 101.

[0065] Working principle: During use, the impeller of the fan is sleeved and installed on the head end part of the rotor shaft 102;

[0066] The electric heating tube 3 can heat the outer shell of the motor 1, raising the temperature of the stator installed on the inner wall of the outer shell of the motor 1, warming up the stator to resist cold. When the rotor shaft 102 rotates, it can drive the air extraction impeller 1023 to rotate together. When the air extraction impeller 1023 rotates, it can suck and convey the air inside the air collecting hood 202 into the air guide holes, and form a negative pressure inside the air collecting hood 202. Under the action of the negative pressure suction force inside the air collecting hood 202, the hot air heated by the electric heating tube 3 inside the circle of sleeves 2 is sucked into the air collecting hood 202 through the circle of L-shaped air ducts 201, and is continuously sucked and conveyed into the air guide holes by the air extraction impeller 1023. When the hot air flows through the air guide holes, it can heat the rotor shaft 102 and the rotor, warming up the whole stator to resist cold.

[0067] In this article, the following points need attention:

[0068] 1. The attached drawings of the embodiments of the present invention only relate to the structures involved in the embodiments of the present invention, and other structures can refer to the general design.

[0069] 2. Without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0070] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A low-temperature resistant fan motor, comprising: A motor (1), wherein a sleeve (2) is disposed around a circumferential shell wall of the motor (1); The invention is characterized in that the sleeve (2) is a structure with an open front end and a blocked rear end, and an electric heating pipe (3) is inserted and installed in each sleeve (2); a circle of L-shaped air ducts (201) is welded around the rear end blocking plate of a circle of the sleeve (2), and an air collecting cover (202) is welded between the rear ends of the circle of L-shaped air ducts (201); An air guide hole is provided inside the rotor shaft (102) of the motor (1), a short pipe (1021) is welded to the rear end of the air guide hole, a conical air suction cover (1022) is welded to the front end of the short pipe (1021), an extension ring is welded to the front end of the air suction cover (1022), and an exhaust impeller (1023) is welded inside the extension ring; The cross section of the wind collecting hood (202) is a U-shaped structure, and the extension ring is inserted into the tail end opening portion of the wind collecting hood (202) and rotatably cooperates with the tail end opening portion of the wind collecting hood (202).

2. A low temperature resistant fan motor according to claim 1, characterized in that: A rotation gap is maintained between the extension ring and the circumferential side wall of the wind collecting cover (202).

3. The low temperature resistant fan motor according to claim 1, characterized in that: A circular plugging cover (301) is fixedly provided at the head end portion of the electric heating tube (3), and a threaded sleeve (302) is fixedly provided on the side of the circular plugging cover (301) facing the sleeve (2), and the threaded sleeve (302) is screwed together with the head end portion of the sleeve (2).

4. The low temperature resistant fan motor according to claim 3, characterized in that: When the threaded sleeve (302) is screwed together with the sleeve (2), the circular plugging cover (301) is locked and plugged onto the opening at the head end of the sleeve (2).

5. The low temperature resistant fan motor according to claim 3, characterized in that: A circle of air inlet holes (303) is formed around the portion of the circular plugging cover (301) located between the electric heating tube (3) and the threaded sleeve (302).

6. The low temperature resistant fan motor according to claim 1, characterized in that: A semicircular groove (101) is arranged around the circumferential shell wall of the motor (1).

7. The low temperature resistant fan motor according to claim 1, characterized in that: A circle of the sleeve (2) is correspondingly welded inside a circle of the semicircular groove (101).

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