JP3490166B2 - Spray cleaning method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing method for a pressure type spray washing machine used in a coin car wash, a non-brush gate type car wash, car body washing, building washing, dish washing and the like.

[0002]

2. Description of the Related Art Generally, in washing with a pressure type spray washing machine, a detergent containing water or various surfactants in water, or a detergent containing an alkali builder added thereto is used. However, under the present circumstances, it is impossible to remove stains that can be removed immediately by rubbing lightly with the fingertip. For this reason, although a strong alkaline detergent containing a large amount of an alkali builder is applied to the surface to be cleaned to raise the dirt and then the surface is cleaned with a high pressure spray, sufficient cleaning power is not obtained.

[0003]

However, in the above-mentioned cleaning method, the cleaning power is insufficient and a large amount of the strong alkaline component is discharged, which is a serious problem in terms of pollution. In order to prevent this, wastewater treatment equipment that can be drained after neutralization is required, which requires a large amount of equipment and has a drawback that the washing machine must be fixed. On the other hand, as another cleaning method, inorganic substances, resins, and other powders that are insoluble in water are blended in the cleaning agent of the pressure type spray cleaning machine, and sprayed onto the surface to be cleaned so that the particles have a physical action. It is known that the cleaning power is significantly increased, but after cleaning, powder that does not dissolve in water adheres to and accumulates on the surface to be cleaned and the surface to be cleaned, and these treatments are not possible. Aesthetically, the problem of drainage is so great that it is not used at present.

[0004]

The present invention has been invented to solve the above problems, and proposes an invention relating to the spray cleaning method of claims 1 to 4. Claim 1
In the invention of 1, the water or the general cleaning liquid (hereinafter, these water or cleaning liquid is simply referred to as a cleaning agent) is pressurized to a certain degree from the powder introduction device between the time when the cleaning agent is discharged after the pressure is applied by the pressure pump. Sodium hydrogencarbonate powder is quantitatively added to the cleaning agent, and sprayed from a spray nozzle to reach the surface to be cleaned within a time period in which the sodium hydrogencarbonate powder does not dissolve in the cleaning agent. As a result, the sodium hydrogencarbonate particles added to the cleaning agent collide with the surface to be cleaned, and the physical action of the sodium hydrogencarbonate particles significantly enhances the cleaning power. Also, after washing,
By closing the valve and rinsing with only the cleaning agent without mixing sodium hydrogen carbonate, the particles of sodium hydrogen carbonate remaining on the surface to be cleaned are dissolved in the cleaning agent and drained together with the cleaning agent.

The sodium hydrogencarbonate used in the present invention is the same as baking soda and baking powder, and is safe for human body and has low pH because the pH of the aqueous solution is not high. According to the present invention, the cleaning action is remarkably enhanced by the physical action of the sodium hydrogencarbonate particles, and after cleaning, the electromagnetic valve is closed and the sodium hydrogencarbonate powder is rinsed with only the cleaning agent without being mixed. Therefore, the sodium hydrogencarbonate particles remaining on the surface to be cleaned can be accurately dissolved and removed, an extremely good cleaning result can be obtained, and the pollution problem due to drainage can be almost avoided. If necessary, a suitable amount of a surfactant may be uniformly blended with the sodium hydrogen carbonate powder, and the powder may be added to the cleaning agent from the powder introduction device.

The inventions of claims 2 and 3 are characterized by a method of neutralizing the sodium hydrogencarbonate particles used for cleaning after cleaning, dissolving the particles in a cleaning agent, and discharging the solution. According to the second aspect of the present invention, the amount of the powdered organic acid necessary for neutralizing the sodium hydrogen carbonate is preliminarily blended with the powdered sodium hydrogen carbonate, and then the powdered organic acid is added to the detergent. The organic acid powder particles also enhance the cleaning effect. It should be noted that the powdered organic acid and the powdered sodium hydrogen carbonate may be added to the cleaning agent separately without being blended in advance. After the cleaning, the weakly alkaline sodium hydrogen carbonate is neutralized by the organic acid, dissolved in the cleaning agent, and drained, which is safer and more pollution-free.

The powdery organic acid used here is an aliphatic carboxylic acid such as citric acid, oxalic acid, malic acid, adipic acid or fumaric acid, an aminocarboxylic acid such as ethylenediaminetetraacetic acid or nitrilotriacetic acid, or benzoic acid. An aromatic carboxylic acid such as an acid or phthalic acid may be used. In particular, aliphatic carboxylic acids, aminocarboxylic acids and the like easily generate carbon dioxide gas when neutralizing sodium hydrogencarbonate to cause a foaming state, so that the cleaning power can be further enhanced.

According to a third aspect of the present invention, a method of washing by adding sodium hydrogencarbonate powder to a detergent in which an amount of acid necessary for neutralizing sodium hydrogencarbonate is mixed in advance is used. It should be noted that the acid and the detergent may be mixed separately in the step before adding the sodium hydrogen carbonate powder. After washing, as in the second aspect, the sodium hydrogencarbonate is neutralized, dissolved in a detergent and discharged, which is safer and more pollution-free. The acid used here may be a general organic acid or inorganic acid, and may be in the form of powder or liquid.

The invention of claim 4 is different from the inventions of claims 1 to 3, in which only the powdery organic acid is added to the cleaning agent from the powder introducing device to enhance the cleaning power by the physical action of the organic acid particles. This is for cleaning by adding the organic acid powder to a cleaning agent in which an amount of sodium hydrogen carbonate necessary for neutralizing the organic acid is mixed in advance. It should be noted that sodium hydrogen carbonate and the cleaning agent may be separately mixed in the step before adding the organic acid powder. After washing, the organic acid will be neutralized, and it will be dissolved in the detergent and discharged.
It is safer and more pollution-free. The powdered organic acid used here is the above-mentioned aliphatic carboxylic acid, aminocarboxylic acid,
Although aromatic carboxylic acids and the like can be mentioned, aliphatic carboxylic acids and amino carboxylic acids, which have a fast neutralization reaction with sodium hydrogen carbonate, are more suitable.

The cleaning agent in the present invention is a general cleaning solution containing water or anion, nonion, amphoteric, kaolin surfactant and a mixed surfactant thereof as a main component, and powder particles to be sprayed. It is preferable that the size of is as small as possible because the amount of collision per unit area increases and the effect can be obtained with a small amount. As described above, according to the present invention, when the cleaning agent is spray-washed under pressure, the powdery sodium hydrogen carbonate or the powdered organic acid is added to the cleaning agent, and the surface to be cleaned is not dissolved within a time period. Sprayed on the surface of the body to remarkably enhance the detergency by the physical action of the undissolved particles, and after cleaning, those sodium hydrogen carbonate or organic acid particles are dissolved in the cleaning agent and drained together with the cleaning agent. It is a safe and pollution-free cleaning method.

[0011]

【Example】

Evaluation method 1. Detergency After the completion of washing, the degree of dirt removal is visually determined. ◯: Dirt is well removed. Δ: Some dirt is removed. X: Almost no dirt was removed. 2. Residual power of powder After completion of cleaning, visually determine how much powder remains on the surface to be cleaned and its vicinity. ○: Almost nothing remains. Δ: A little remains. X: Large amount remains. 3. Problems when draining After cleaning, pH of drainage is measured to determine if there is a problem with pollution. ◯: Almost neutral and no problem. Δ: Weak alkaline, with some problems. X: There is a problem with strong alkalinity.

Formulation Example 1

[Table 1] Formulation example 2

[Table 2] Formulation example 3

[Table 3] Formulation example 4

[Table 4] Comparative formulation example 1

[Table 5] Comparative formulation example 2

[Table 6] (result)

[Table 7]

As is clear from the above results, the compounding examples 1, 2, 3, and 4, which are the examples of the present invention, have good detergency, almost no powder remains, and there is no problem in drainage. However, in Comparative Formulation Examples 1 and 2, the drainage was alkaline and a large amount of powder remained, so that good results were not obtained.

Claims (4)

(57) [Claims] 1. When cleaning by spraying water or a cleaning liquid under pressure, hydrogen carbonate is added by adding powdered sodium hydrogencarbonate to the water or cleaning liquid and spraying the surface to be cleaned within a time period until dissolution. Particles of sodium hydrogen carbonate remaining on the surface to be cleaned by enhancing the cleaning power by the physical action of sodium particles, and closing the valve after cleaning and rinsing with water or a cleaning solution only without sodium hydrogen carbonate being mixed. The method for spraying cleaning is characterized in that the water is dissolved in water or a cleaning liquid and is drained. 2. When spraying with water or a cleaning liquid under pressure, powdered sodium hydrogen carbonate and an amount of powdered organic acid necessary for neutralizing sodium hydrogen carbonate are added to the water or the cleaning liquid for dissolution. By spraying on the surface to be cleaned within a short time, the cleaning power is enhanced by the physical action of the sodium hydrogen carbonate and organic acid particles, and the sodium hydrogen carbonate and organic acid particles neutralize after cleaning. A spray cleaning method characterized by being dissolved in water or a cleaning liquid so as to be discharged. 3. When spraying with water or a cleaning liquid under pressure, powdered sodium hydrogencarbonate is added to a mixture of an acid and water or a cleaning liquid in an amount necessary for neutralizing sodium hydrogencarbonate, and the mixture is dissolved. By spraying on the surface to be cleaned within a certain period of time, the cleaning power is enhanced by the physical action of the sodium hydrogencarbonate particles, and after cleaning, the sodium hydrogencarbonate particles neutralize with the acid and become water or a cleaning solution. A spray cleaning method characterized by being dissolved and discharged. 4. A powdery organic acid is added to a mixture of sodium hydrogencarbonate and water or a cleaning liquid in an amount necessary for neutralizing the organic acid when the water or the cleaning liquid is spray-washed under pressure, and the mixture is dissolved. By spraying on the surface to be cleaned within a certain period of time, the cleaning power is enhanced by the physical action of the organic acid particles, and after cleaning, the organic acid particles are neutralized with the sodium hydrogen carbonate to become water or a cleaning solution. A spray cleaning method characterized by being dissolved and discharged.