Lifting device used for component replacement of fresh air ventilator

Abstract

The invention discloses a lifting device used for component replacement of a fresh air ventilator, and belongs to auxiliary devices of fresh air equipment. A high-power motor is required for existingfresh air equipment provided with a filter element replacement device; and according to the lifting device used for component replacement of the fresh air ventilator, a pulley block used for reducingthe load of a motor is arranged for a steel wire rope used for pulling a lifting frame, so that a low-power motor can be used when a product is designed, the space occupied by the motor is reduced, and meanwhile, the cost is reduced. In addition, the steel wire rope is made to wind across a movable rope guiding wheel assembly, an elastic element acts on the rope guiding wheel assembly, the direction of elastic force applied to the rope guiding wheel assembly by the elastic element is opposite to the direction of acting force applied to the rope guiding wheel assembly by the steel wire rope, the rope guiding wheel assembly is provided with a load loss limiting switch, the rope guiding wheel assembly is promoted to move in the direction of the elastic force to trigger the load loss limitingswitch when the tensile force of the steel wire rope is reduced, the motor is controlled by the load loss limiting switch to stop rotating, and thus the protection effect is achieved.

Description

technical field [0001] The invention belongs to an auxiliary device of fresh air equipment, and in particular relates to a lifting device for replacing parts of a fresh air fan. Background technique [0002] For the ceiling-type indoor fresh air fan, when replacing the internal filter element, it is usually necessary to disassemble the ceiling gusset, open the casing cover, remove the filter element of the fresh air fan, and then install the new filter element on the fresh air fan. Put on the case cover, and finally install the ceiling gusset. In areas with poor air quality, the filter elements of fresh air fans are replaced more frequently, and the ceiling gusset and casing cover need to be removed frequently. The entire replacement operation of the fresh air fan filter element is cumbersome, and other auxiliary tools such as ladders are also needed. [0003] The Chinese invention patent application with the application publication number CN106918134A discloses a "filter ...

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Problems solved by technology

[0004] However, compared with the previous fresh air equipment without a filter element replacement device, the scheme of the above-mentioned invention patent application adds a structure such as a motor, so it is necessary to arrange a location for the installation of the motor, which easily leads to an increase in the volume of the fresh air equipment. However, above the suspended ceiling Minimizing the space occupied by additional structures such as motors has become a factor that must be considered when designing products. However, smaller motors often have insufficient power, which becomes a new obstacle to the selection of smaller power motors.

Moreover, the higher price of the motor with higher power will increase the manufacturing cost of the whole fresh air equipment

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