CN110821858A

CN110821858A - Mechanism for flexibly connecting cross-flow fan impeller and motor of indoor unit of household air conditioner

Info

Publication number: CN110821858A
Application number: CN201910973109.6A
Authority: CN
Inventors: 江仁燕
Original assignee: Individual
Current assignee: Shenzhen Bailida Electric Appliance Co ltd
Priority date: 2019-10-14
Filing date: 2019-10-14
Publication date: 2020-02-21
Anticipated expiration: 2039-10-14
Also published as: CN110821858B

Abstract

The invention relates to the technical field of household air conditioners and discloses a flexible connecting mechanism for a cross-flow fan impeller and a motor of an indoor unit of a household air conditioner. According to the invention, the driving shaft is flexibly connected with the inner wall and the outer wall of the impeller through the flexible connecting mechanism, the flexible connecting mechanism extends out to be connected with the impeller by utilizing the rotation inertia of the driving shaft, so that the impeller is driven to rotate, when the driving motor of the driving shaft is powered off, the flexible connecting mechanism leaves the inner wall of the impeller due to the loss of the inertia force and stops quickly, the impeller continues to rotate without influencing the driving shaft, and the coil of the motor is further protected from being used safely.

Description

Mechanism for flexibly connecting cross-flow fan impeller and motor of indoor unit of household air conditioner

Technical Field

The invention relates to the technical field of household air conditioners, in particular to a flexible connecting mechanism for a cross-flow fan impeller and a motor of an indoor unit of a household air conditioner.

Background

The cross-flow fan is commonly used in an indoor unit of an air conditioner, is in a tower column shape or a cylinder shape, and consists of an impeller, an air duct and a motor, wherein the impeller is in a multi-blade type and long cylinder shape and is provided with a forward multi-wing-shaped blade; the air duct is a metal sheet cover wrapping the impeller, guides and discharges airflow, and reduces the loss of the airflow; the motor is a power part and can be supplied with alternating current or direct current.

The impeller of the cross-flow fan is in a long cylinder shape, airflow enters from one side, and is discharged from the other side after vortex is formed in the impeller, so that when the impeller of the cross-flow fan operates, air flow always exists in the impeller, when the motor is powered off and stopped, the vortex in the impeller still drives the impeller to rotate, and under the condition of small impeller bearing resistance, the impeller still can rotate for a long time to stop after being powered off, and if the output shaft of the motor is rigidly connected with the impeller, residual rotation can cause electricity generation of a coil in the motor to generate generation voltage, so that the coil generates heat, and the use of the motor is not facilitated.

Disclosure of Invention

Aiming at the defects existing in the connection of the conventional cross-flow fan impeller and a motor in the background technology, the invention provides a flexible connection mechanism of the cross-flow fan impeller and the motor of the indoor unit of the household air conditioner, which has the advantages of protecting a motor coil by flexible connection and adapting to the rotating speed of the motor to reasonably utilize electric energy, and solves the problems in the background technology.

The invention provides the following technical scheme: a flexible connecting mechanism for an impeller and a motor of a cross-flow fan of a household indoor unit of an air conditioner comprises a driving shaft and impellers, wherein three flexible connecting mechanisms are annularly arrayed on the outer surface of the driving shaft, each flexible connecting mechanism is a telescopic rod, and the driving shaft rotates to drive the flexible connecting mechanisms to extend in an inertial manner and tightly abut against the inner surfaces of the impellers to drive the impellers to rotate.

Preferably, flexible connection mechanism is including linking a section of thick bamboo, even a section of thick bamboo fixed connection is in the surface of drive shaft, the connecting rod has been cup jointed in the inside activity of linking a section of thick bamboo, the top fixedly connected with arc of connecting rod links the board, the arc links the board and supports the inner wall of tight impeller after the connecting rod stretches out, the bottom fixedly connected with magnetic sleeve of connecting rod, the bottom fixedly connected with extension spring that resets of magnetic sleeve, the other end that resets the extension spring and the inner bottom fixed connection who links a section of thick bamboo, the inner bottom of linking a section of thick bamboo is equipped with the electro-magnet, the electro-magnet is located the inside of extension spring that resets, the magnetic sleeve is the permanent magnet and its bottom magnetic pole and the top magnetic pole polarity that the.

Preferably, the top of arc even board is equipped with the fixture block, the fixture block is right triangle, and is equipped with the salient angle that corresponds with the right-angle side of fixture block looks adaptation at the inner wall of impeller.

Preferably, the clamping block is a small magnet block, the right-angle side of the clamping block is a magnetic pole of the magnet block, and the magnetic pole of the right-angle side of the convex angle of the inner wall of the impeller is the same as the magnetic pole of the clamping block side.

Preferably, the electromagnets are connected in parallel in the circuit.

The invention has the following beneficial effects:

1. according to the invention, the driving shaft is flexibly connected with the inner wall and the outer wall of the impeller through the flexible connecting mechanism, the flexible connecting mechanism extends out to be connected with the impeller by utilizing the rotation inertia of the driving shaft, so that the impeller is driven to rotate, when the driving motor of the driving shaft is powered off, the flexible connecting mechanism leaves the inner wall of the impeller due to the loss of the inertia force and stops quickly, the impeller continues to rotate without influencing the driving shaft, and the coil of the motor is further protected from being used safely.

2. According to the invention, the magnetic sleeve, the reset tension spring and the electromagnet are arranged, and the repulsion force between the magnetic sleeve and the electromagnet is used for adjusting, so that the flexible connecting mechanism can be correspondingly adjusted along with the change of the rotating speed of the motor, and the flexible connecting mechanism can be stably connected under the settings of different air supply quantities of the air conditioner.

3. According to the invention, the arc-shaped connecting plate and the impeller are provided with the corresponding and matched clamping blocks, and the clamping blocks are provided with the small magnets, so that the contact surfaces of the clamping blocks are magnetically repelled, the noise during collision can be effectively reduced, the contact impact force is weakened by the repulsive force, and the clamping blocks are better protected.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a flexible connection mechanism of the present invention.

In the figure: 1. a drive shaft; 2. an impeller; 3. a flexible connection mechanism; 31. connecting the cylinders; 32. a connecting rod; 33. an arc-shaped connecting plate; 34. a magnetic sleeve; 35. a return tension spring; 36. an electromagnet; 37. and (7) clamping blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.

Referring to fig. 1-2, a flexible connection mechanism for an impeller and a motor of a cross-flow fan of an indoor unit of a household air conditioner comprises a driving shaft 1 and an impeller 2, wherein the driving shaft 1 is rigidly connected with an output shaft of a motor, the impeller 2 is sleeved outside the driving shaft 1 and fixedly mounted on an air duct shell cover of the cross-flow fan through a bearing, three flexible connection mechanisms 3 are annularly arrayed on the outer surface of the driving shaft 1, the flexible connection mechanisms 3 are telescopic rods, can extend by inertia under the rotation of the driving shaft 1 and are tightly abutted against the inner surface of the impeller 2 to drive the impeller 2 to rotate. Flexible coupling mechanism 3 is including linking a section of thick bamboo 31, even a 31 fixed connection in the surface of drive shaft 1, connecting rod 32 has been cup jointed in the inside activity of linking a 31, the top fixedly connected with arc of connecting rod 32 links board 33, the bottom fixedly connected with magnetic sleeve 34 of connecting rod 32, the bottom fixedly connected with of magnetic sleeve 34 returns extension spring 35, the other end of the extension spring 35 that resets and the inner bottom fixed connection who links a 31, be equipped with electro-magnet 36 at the inner bottom of linking a 31, electro-magnet 36 is located the inside of the extension spring 35 that resets, magnetic sleeve 34 is the permanent magnet, its bottom magnetic pole is the same with the top magnetic pole polarity that electro-magnet 36 circular telegram produced, it is the resilience state of pulling to.

Therefore, when the motor adjusts low-rotation-speed air supply, the electromagnet 36 is electrified to generate a magnetic field, the compensation connecting rod 32 extends out of required power, when the motor adjusts high-rotation-speed air supply, the electromagnet can be closed or electrified with low current to assist the extension of the electromagnet, the requirement of the motor in actual use is met, electric energy is saved, the design calculation can be carried out, the reset tension spring 35 is pulled by centrifugal force generated by the rotating speed under fixed mass to generate strain, and the residual stroke strain is provided by magnetic repulsion force compensation.

Wherein, the top of arc even board 33 is equipped with fixture block 37, and fixture block 37 is right triangle, and is equipped with the salient angle that corresponds with the right-angle side of fixture block 37 looks adaptation in impeller 2's inner wall. The arrangement of the fixture block 37 can enable the arc-shaped connecting plate 33 to more stably drive the impeller 2 to synchronously rotate when abutting against the inner wall of the impeller 2.

Wherein, fixture block 37 is little magnet piece, and its right-angle side is the magnetic pole of magnet piece, and the salient angle right-angle side magnetic pole of 2 inner walls of impeller is the same with fixture block 37 side. Noise in collision can be effectively reduced, and the repulsive force can weaken the contact impact force, and the fixture block 37 can be better protected.

In order to achieve a better energy-saving effect, the electromagnet 36 and the motor are connected into the same circuit in parallel, under constant voltage, when the rotating speed of the motor is high, the current is large, the current passing through the electromagnet 36 is small, and when the rotating speed of the motor is low, the current passing through the electromagnet 36 is large, so that the extra heat energy of the current transformer resistor can be reasonably utilized. The energized wire connection of the electromagnet 36 may be rotationally electrically connected through brushes.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a domestic air conditioning indoor set cross flow fan impeller and motor flexible coupling mechanism, includes drive shaft (1) and impeller (2), its characterized in that: the outer surface of the driving shaft (1) is annularly arrayed with three flexible connecting mechanisms (3), the flexible connecting mechanisms (3) are telescopic rods, and the driving shaft (1) rotates to drive the flexible connecting mechanisms (3) to extend inertially and abut against the inner surface of the impeller (2) to drive the impeller (2) to rotate.

2. The mechanism of claim 1 for flexibly connecting a cross-flow fan impeller and a motor of a household air conditioner indoor unit, which is characterized in that: flexible connection mechanism (3) is including linking a section of thick bamboo (31), link a section of thick bamboo (31) fixed connection in the surface of drive shaft (1), connecting rod (32) have been cup jointed in the inside activity of linking a section of thick bamboo (31), the top fixedly connected with arc of connecting rod (32) links board (33), arc links board (33) and stretches out the inner wall that the back supported impeller (2) at connecting rod (32), the bottom fixedly connected with magnetic sleeve (34) of connecting rod (32), the bottom fixedly connected with extension spring (35) that resets of magnetic sleeve (34), the other end that resets extension spring (35) and the inner bottom fixed connection who links a section of thick bamboo (31), the inner bottom that links a section of thick bamboo (31) is equipped with electro-magnet (36), electro-magnet (36) are located the inside that resets extension spring (35), magnetic sleeve (34) are permanent magnet and its bottom magnetic pole and the top magnetic pole that electro-magnet (36) circular telegram produced polarity is, the reset tension spring (35) is in a tension rebound state.

3. The mechanism of claim 2 for flexibly connecting a cross-flow fan impeller and a motor of a household air conditioner indoor unit, which is characterized in that: the top of arc even board (33) is equipped with fixture block (37), fixture block (37) are right triangle, and are equipped with the salient angle that corresponds with the right-angle side of fixture block (37) looks adaptation at the inner wall of impeller (2).

4. The mechanism of claim 3 for flexibly connecting a cross-flow fan impeller and a motor of a household air conditioner indoor unit, which is characterized in that: the fixture block (37) is a small magnet block, the right-angle side of the fixture block is a magnetic pole of the magnet block, and the magnetic pole of the right-angle side of the convex angle of the inner wall of the impeller (2) is the same as the magnetic pole of the fixture block (37).

5. The mechanism of claim 2 for flexibly connecting a cross-flow fan impeller and a motor of a household air conditioner indoor unit, which is characterized in that: the electromagnets (36) are connected in parallel in the circuit.