JP-2026075234-A - Cleaning apparatus and cleaning method

JP2026075234AJP 2026075234 AJP2026075234 AJP 2026075234AJP-2026075234-A

Abstract

[Problem] To provide a cleaning apparatus and cleaning method that can prevent condensation on the object to be cleaned while suppressing the re-adhesion of contaminants to the cleaned area when cleaning by spraying solid carbon dioxide onto the object to be cleaned. [Solution] The cleaning device 100 includes a solid carbon dioxide injection means for injecting powdered solid carbon dioxide 1 onto the surface 200A of the object to be cleaned 200, and a gas injection means for injecting a gas 2 that passes over the area to be cleaned to which the powdered solid carbon dioxide 1 is sprayed on the surface 200A, heats the surface 200A, and transports the contaminants IM removed from the surface 200A. [Selection Diagram] Figure 1

Inventors

満田理佐
藤原淳史

Assignees

三菱電機株式会社

Dates

Publication Date: 20260508
Application Date: 20241022

Claims (15)

A solid carbon dioxide spraying means for spraying powdered solid carbon dioxide onto the surface of an object to be cleaned, A gas injection means for injecting a gas that passes over the area to be cleaned to which the powdered solid carbon dioxide is sprayed onto the surface to be cleaned, heats the surface to be cleaned, and conveys the contaminants removed from the surface to be cleaned, A cleaning device equipped with the following features.
The solid carbon dioxide injection means comprises a solid carbon dioxide injection nozzle that injects powdered solid carbon dioxide, The gas injection means comprises a gas injection nozzle for injecting gas, The solid carbon dioxide injection nozzle and the gas injection nozzle are arranged in the order of the solid carbon dioxide injection nozzle and the gas injection nozzle, based on the direction of transport of the contaminants removed from the surface to be cleaned. The gas injection nozzle is positioned away from the solid carbon dioxide injection nozzle and is directed toward the area to be cleaned. The cleaning apparatus according to claim 1.
The solid carbon dioxide injection nozzle extends along the conveying direction and has its injection port inclined toward the surface to be cleaned. The gas injection nozzle extends along the conveying direction and has its injection opening inclined toward the surface to be cleaned. The angle between the central axis of the gas injection nozzle and the perpendicular to the surface to be cleaned is greater than the angle between the central axis of the solid carbon dioxide injection nozzle and the perpendicular to the surface to be cleaned. The cleaning apparatus according to claim 2.
The angle between the central axis of the solid carbon dioxide injection nozzle and the perpendicular to the surface to be cleaned is between 0° and 60°. The cleaning apparatus according to claim 3.
The system further includes a pre-heating means for heating the unwashed areas of the surface to be cleaned. The cleaning apparatus according to claim 1 or 2.
The aforementioned preheating means heats the surface to be cleaned to 50°C or higher. The cleaning apparatus according to claim 5.
The system further comprises a holding means for holding the solid carbon dioxide injection nozzle and the gas injection nozzle. The cleaning apparatus according to claim 2.
The system further includes robotic means for holding and moving the solid carbon dioxide injection nozzle and the gas injection nozzle. The cleaning apparatus according to claim 2.
The robotic means includes means for holding the solid carbon dioxide injection nozzle and the gas injection nozzle and moving them in a direction perpendicular to the direction of transport of the contaminant. The cleaning apparatus according to claim 8.
The solid carbon dioxide injection means injects solid carbon dioxide with a particle size of 0.3 to 3.0 mm. The cleaning apparatus according to claim 1 or 2.
While spraying powdered solid carbon dioxide onto the surface of the object to be cleaned, A gas is blown onto the area to be cleaned, which is being sprayed with solid carbon dioxide, to heat the area to be cleaned and to transport the contaminants removed from the area by the powdered solid carbon dioxide. Cleaning method.
The powdered solid carbon dioxide and the gas are sprayed onto the surface to be cleaned from an oblique direction. The cleaning method according to claim 11.
While spraying the powdered solid carbon dioxide and the gas onto the object to be cleaned, the position of the area to be cleaned is moved in a direction perpendicular to the direction of transport of the contaminated material. The cleaning method according to claim 11 or 12.
After preheating the uncleaned areas of the surface to be cleaned, the surface to be cleaned is cleaned using the cleaning method described in claim 11 or 12. Cleaning method.
The position of the area to be cleaned on the surface to be cleaned, which extends in the vertical direction, is moved from top to bottom with respect to the vertical direction. The cleaning method according to claim 11 or 12.

Description

This disclosure relates to a cleaning apparatus and a cleaning method. A known method of cleaning objects involves spraying snow-like solid carbon dioxide onto the surface of the object to be cleaned. When solid carbon dioxide is sprayed onto an object, the temperature of the sprayed area decreases, which can cause condensation. For example, if the object to be cleaned is a component to be painted before painting, condensation can affect the subsequent painting process. Therefore, preventing condensation on the object to be cleaned is required. As a technology to prevent condensation caused by spraying solid carbon dioxide, for example, Patent Document 1 discloses a solid carbon dioxide injection nozzle comprising an inner tube for ejecting solid carbon dioxide and an outer tube spaced apart from the inner tube. This solid carbon dioxide injection nozzle prevents condensation by passing a condensation-preventing gas between the inner and outer tubes and ejecting it from the tip. However, the anti-condensation gas ejected from the solid carbon dioxide injection nozzle described in Patent Document 1 is intended to prevent condensation on the nozzle itself, and its injection pressure is low. Therefore, the anti-condensation gas does not reach the object being cleaned, and thus condensation on the object cannot be prevented. Furthermore, even if some of the anti-condensation gas reaches the object being cleaned, because it is ejected from all sides of the inner tube, it scatters contaminants. As a result, contaminants reattach to the cleaned area. Japanese Patent Publication No. 2003-145429 Perspective view showing the configuration of the cleaning device according to the embodiment.A diagram showing the arrangement of a solid carbon dioxide injection nozzle and a gas injection nozzle according to the embodiment.(A) (B) Diagram showing the arrangement of the solid carbon dioxide spraying area and the gaseous carbon dioxide spraying area according to the embodiment.(A)(B)(C) Diagrams showing the arrangement of the solid carbon dioxide blowing area and the gaseous blowing area according to the embodiment.Diagram showing a cleaning method according to an embodiment.A diagram showing the movement of the solid carbon dioxide spraying area according to the embodiment before and after.Diagram showing a cleaning method according to an embodiment.Diagram showing a cleaning method according to an embodiment.Diagram showing a cleaning method according to an embodiment.Perspective view showing a cleaning device according to a modified embodiment.Perspective view showing a cleaning device according to a modified embodiment.(A) Front view, (B) Bottom view of a solid carbon dioxide injection nozzle according to a modified embodiment.Perspective view showing a cleaning device according to a modified embodiment. (Washing device) The cleaning apparatus according to the embodiments of this disclosure will be described below with reference to the drawings. As shown in Figure 1, the cleaning apparatus 100 according to the embodiment includes a solid carbon dioxide injection nozzle 110 for injecting powdered solid carbon dioxide 1, a solid carbon dioxide pulverizer 112 for supplying powdered solid carbon dioxide 1 to the solid carbon dioxide injection nozzle 110, a solid carbon dioxide supply hose 113 connecting the solid carbon dioxide injection nozzle 110 and the solid carbon dioxide pulverizer 112, a gas injection nozzle 120 for injecting gas 2 to heat the surface to be cleaned 200A, a compressor 122 for supplying gas 2 to the gas injection nozzle 120, a gas supply hose 123 connecting the gas injection nozzle 120 and the compressor 122, and a robot 130 for moving the solid carbon dioxide injection nozzle 110 and the gas injection nozzle 120. The surface 200A of the object to be cleaned, 200, is covered with contaminants IM. The cleaning device 100 separates and removes the contaminants IM from the surface 200A by spraying powdered solid carbon dioxide 1 (powdered solid carbon dioxide) onto the surface 200A. More specifically, the cleaning device 100 sprays the powdered solid carbon dioxide 1 over a certain area of the surface 200A and gradually moves the spraying position to clean the entire surface 200A. The type, shape, and material of the object to be cleaned 200 are not limited, but for example, it may be a component to be painted before painting, specifically steel plates such as iron, galvanized steel, aluminum, or stainless steel. The object to be cleaned 200 may also be made of resin. Furthermore, the contaminants IM are not limited, but for example, they may include rust-preventive oil, machine oil, sebum, organic matter, hydrocarbons, dirt, particles, and attached substances before painting. The solid carbon dioxide injection nozzle 110 is formed, for example, in a cylindrical shape, and its tip is provided with a solid carbon dioxide injection port 111, which is an injection port for powdered solid carbon dioxide 1. Th