JPS62190333A - Mold-proof and corrosion-proof device for air conditioning equipment - Google Patents

Abstract

PURPOSE:To exterminate microorganisms or ticks and also prevent the corrosion equipment with capturing sea salt particles simultaneously at an air intake hole by passing air introduced into an air conditioning equipment through a filter layer impregnated with sterilizing and mold killing agent. CONSTITUTION:Intake air before passing through a heat exchanging coil 1 is treated in sterilizing and tick killing condition by a filter 2 impregnated with sterilizing and tick killing agent. An endless filter medium 5 of the filter 2 is turned round continuously between drums 3 and 4 and also the installation of the lower drum 4 in a tank 8 accommodating sterilizing and tick killing liquid 7 causes the medium to 5 come into contact with the liquid 7 in the tank to be impregnated with this liquid. The liquid 7 is supplied from a water vessel 9 through a supply pipe 10 and then discharged to the outside of a system through a drain pipe 11.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an anti-mold and anti-corrosion device for air conditioning equipment.

[Conventional technology]

BACKGROUND ART Conventionally, as corrosion prevention measures for air conditioning duct systems and air conditioning equipment in air conditioning equipment, efforts have been made to improve the materials that make up these components. In other words, the problem of corrosion is addressed by using materials that exhibit corrosion resistance as much as possible, and in some cases using materials with anti-corrosion coatings. Technological development has been extensively carried out with a view to providing the market with an advantageous approach. Therefore, it would not be an exaggeration to say that the corrosion prevention technology for conventional air conditioning equipment is a technology in terms of materials.

Since it would be very expensive to construct all the materials that come into contact with the air to be treated in air conditioning equipment from corrosion-resistant metal materials, such as stainless steel, coated steel plates coated with anti-corrosion coatings have been used. Also, from the viewpoint of aesthetics, it was widely practiced to paint the surface of metal materials.

(Problem to be solved by the invention) Metal materials (such as coated steel plates, etc.) that have an a-layer on their surface, such as a coating film of an organic substance, are used as materials for surfaces that come into contact with air in air conditioning equipment. If a composite material is used, this organic layer usually provides corrosion protection for the underlying metal, but it has a significantly shorter service life than the composite metal material would have when the air conditioning equipment is in actual operation. In some cases, the underlying metal corrodes unexpectedly.This problem occurs because the metal in the area with the organic coating, which was originally thought to be corrosion resistant, corrodes unexpectedly. This is a troublesome problem in that corrosion cannot be predicted.Moreover, if the paint film is made of an organic material, the underlying metal will corrode regardless of the type of organic material, and the paint film will corrode if it is made of an inorganic material. A different situation emerges than when .

The present invention aims to solve such troublesome problems in air conditioning equipment.

[Means to solve problems]

The present invention provides an air intake route to the air conditioning equipment as a means for preventing metal in the portion where the organic material is present from unexpectedly corroding in the air conditioning equipment where an organic material is present on the surface that comes into contact with the treated air. It is characterized by having a sterile acaricide-impregnated filter installed in it.

The present inventor has discovered that the corrosion described above is caused by microorganisms, and more specifically, by the combined effect of the infiltration of microorganisms and sea salt particles. Since air conditioning equipment produces air that is adjusted to an appropriate temperature and humidity, this air path maintains an appropriate habitat environment for the species of microorganisms and mites in terms of temperature and humidity. Moreover, if organic materials, which are petrochemical products, are present in the air path.

This organic material becomes their favorite food, and this serves as a source of nutrition.

If the air conditioning equipment in question is a building near the beach, the sea salt particles are entrained in the air and enter the air conditioning equipment, and the sea salt particles adhere to the material. Since sea salt particles are generally deliquescent and contain salts,
At the locations where the sea salt particles adhere, water is adsorbed and a state occurs in which the salts in the sea salt particles are dissolved in ionic form by the water.

This state also becomes a suitable energy source and nutrient source for the microorganisms and mites to live in, creating a more favorable habitat environment. Therefore, among the materials that make up the duct systems and air conditioning equipment in air conditioning equipment, microorganisms and mites, as well as sea salt particles, may adhere to areas where organic materials such as organic coatings are present on the surface. , microorganisms and mites settle and multiply here, microbiologically destroying the organic coating film. Corrosion rapidly progresses due to the ions present here.

Based on this knowledge, the present invention eliminates microorganisms and mites at the air intake port of the air conditioning equipment by passing the air taken into the air conditioning equipment through a single layer of filter impregnated with a sterilizing acaricide. At the same time as it exterminates sea salt particles, it also captures them, thereby preventing the corrosion mentioned above.

Here, sterilizing acaricides include ordinary sterilizers, fungicides, acaricides, etc. available on the market that can exterminate various microorganisms such as bacteria, mold, mold, and spores, as well as mites. means. The filter impregnated with a sterilizing acaricide used in the present invention is made by impregnating a fibrous filter medium with a sterilizing acaricide so that the air passing surface is always wet with the sterilizing acaricide. Good. More specifically, a fibrous endless filter is hung in a loop between a lower drum installed in a tank containing a sterile acaricide-containing liquid and an upper drum installed outside this tank. It is preferable to use a rotating endless filter in which the endless filter is rotated between drums by power. If the sterile acaricide-containing liquid is sprayed onto the surface of the rotating endless filter above the tank, adhering substances such as sea salt particles captured by the filter can be more effectively cleaned.

The contents of the present invention will be specifically explained below based on two drawings.

〔Example〕

FIG. 1 shows an example of the device of the present invention in which cold and hot water for a heat source is used as a replenishment liquid for a sterilizing and acaricide when air conditioning is performed by passing cold and hot water through a heat exchange coil 1. The air taken in before passing through the heat exchange coil 1 is sterilized and mite-killed using a sterilizing and miticide-impregnated filter 2.

The illustrated sterile acaricide-impregnated filter 2 is produced by stretching a fibrous filter medium 5 in a loop between an upper drum 3 and a lower drum 4, and rotating the upper drum 3 with a motor 6 to create an endless filter medium. 5 to drum 3.4
At the same time, by installing the lower drum 4 in the tank B containing the sterilized acaricidal liquid 7, when the endless filter medium 5 passes through the lower drum 4, the sterilized acaricidal liquid 7 in the tank is Impregnate it with this liquid by touching it.

This impregnated state is made to cross the air passage.

The sterilized acaricidal liquid 7 in the tank 8 is supplied from a separately installed water tank 9 through a supply pipe 1o, and is discharged to the outside of the system through a drain pipe 11. The water tank 9 consists of a replenishment water tank 12 and a chemical solution tank 13. Heat source water (cold and hot water) to be passed through the heat exchange coil 1 is supplied to the replenishment water tank 12 via a pipe line 14, and the chemical solution tank 13
contains a concentrated solution of sterile acaricide. Reference numeral 15 indicates a liquid level gauge for the concentrated liquid. To supply cold/hot water for the heat source to the make-up water tank 12: Use the air bleed tap 16 of the exchange coil 1, connect the conduit 14 to the air bleed tap 16, and connect the liquid level automatic adjustment tap to the make-up water tank 12. This is done by attaching 17. Note that hot and cold water is circulated and supplied to the heat exchange coil 1 through branch pipes 21 and 22 to a cold and hot water outgoing pipe 19 and a cold and hot water flow pipe 20 disposed within the building.

The amount and concentration of the sterilized and acaricidal solution 7 to be supplied into the tank 8 are adjusted as follows. A liquid level detector 23 is installed in the tank 8, and the supply pipe 1 is detected by the detection signal of this liquid level detector 23.
Opening/closing control of the motor-operated valve 24 installed at 0 is performed. The opening/closing state of the motor-operated valve 24 is monitored by an infusion regulator 25 installed on the side of the water tank 9, and the sterile and mite-killing concentrate in the chemical tank 13 is controlled to be injected when the motor-operated valve 24 is opened. The chemical solution is injected into the make-up water in the make-up pipe 10 through one pipe line 26 by a chemical pump in the container 25 . Further, an electric drain valve 26 is installed in the drain pipe 11.

By operating the electric drain valve 26 and the electric valve 24 of the supply pipe 10, the liquid level in the tank is kept at a set value at all times.

In addition, 27 is an overflow pipe of the supply water tank 12,
This is connected to a drain pipe 29 for discharging the drain collected in the drain pan 28 of the heat exchange coil 1. The drain pipe 11 of the tank 8 is also connected to this drain pipe 29 .

As the fibrous filter medium 5, a material having good water absorption properties, such as a cloth manufactured and sold by Asahi Kasei Corporation under the trade name "Benliese" is suitable. When rotating the endless filter medium 5, the upper drum 3 and the lower drum 4 are installed substantially in a vertical plane so as to cross the flow of the intake air, and the upper drum 3 and the lower drum 4 are installed in a substantially vertical plane so as to move from the lower drum 4 as shown by the arrow in the figure. It is preferable to rotate the filter medium so that the rising surface of the filter medium toward the upper drum 3 is located on the upstream side of the air flow, and the descending surface of the filter medium from the upper drum 3 toward the lower drum 4 is located on the downstream side of the air flow. good. As a result, the air passes through the tank 8, and first passes through the filter medium 5, which is impregnated with the wtm acaricidal liquid and moves upward. therefore,
In this case, a relatively large amount of liquid is impregnated into the filter medium in balance with the surface tension caused by the capillary phenomenon of the liquid in the fibrous filter medium and the vertical distance from the liquid level in the tank 8, so this increase occurs. When air passes through the filter medium inside,
The air will come into contact with a sterile acaricidal solution,
Even if mist is generated at this time, the mist will be collected by the filter medium 5, which descends on the downstream side and has a relatively small amount of impregnation.

Although sea salt particles and the like are effectively captured by the filter medium through this wet filtration, in order to avoid clogging of the filter medium due to collection of fine particles and pressure loss, the filter medium 5 is placed just above the liquid level in the tank 8. It is preferable to install a spray nozzle 30 that sprays cleaning water toward the lower part of the descending side. This spray nozzle 3
0, a header 31 is horizontally arranged near the lower drum 4 and above the liquid level on the downward side of the filter medium, and from this header 31 a large number of spray nozzles 30 are connected to the filter medium 5.
It is best to install it facing the surface. And header 31
Then, the liquid in the tank 8 is pumped by the pump 32, and the liquid in the tank 8 is sprayed from each spray nozzle 30 toward the surface of the filter medium 5 just before entering the tank 8. As a result, cleaning of the sterilizing and acaricide-impregnated filter is simultaneously achieved during operation.

Although the embodiment shown in Fig. 1 shows an example in which the heat source water flowing through the heat exchange coil is used as make-up water, the make-up water is not limited to this heat source water and may also be normal tap water. Of course. Further, the sterilizing acaricide-impregnated filter may or may not necessarily be built into the air conditioner.

The sterilizing acaricide-impregnated filter can be incorporated into an existing air conditioner, or the sterilizing acaricide-impregnated filter can be removed from an air conditioner incorporating the sterilizing acaricide-impregnated filter and a normal filter installed. You can also do it. That is, the sterilizing and acaricide-impregnated filter according to the present invention can be installed interchangeably with ordinary air filters in air conditioning equipment.

[Effect]

According to the present invention, microorganisms such as bacteria, filamentous fungi, and mites floating in the air before entering the air conditioning equipment and mites are almost completely exterminated. Mold and spores are extremely minute (
Soil bacteria and plant pathogenic bacteria (most of which are about 1 μm in size) float in large amounts in the air throughout all seasons, and in conventional air conditioning equipment, they settle and multiply on painted surfaces where organic substances are present, but the present invention Then, its collection is done by wet filtration, and its habitat is cut off by contact with the sterilizing acaricide. In addition, mites (usually about 0.1 to 0.2 mm) that are linked to the growth of mold are also collected and exterminated at the same time using a sterile acaricide-impregnated filter.

Wet filtration also effectively captures water, which serves as a nutrient and energy source for microorganisms, and sea salt particles, which serve as ion donors. Therefore, the combined removal action of exterminating microorganisms and mites and collecting sea salt particles is achieved at the same time, which eliminates the troublesome problem of unexpected corrosion of organic coatings in conventional air conditioning equipment. This simple equipment can avoid unexpected damage caused by air conditioning, and is especially effective as an air conditioning system for buildings in coastal areas.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing an example of equipment arrangement of the apparatus of the present invention. 1...Heat exchange coil, 2...Sterilizing and acaricide-impregnated filter, 3...Upper drum, 4...Lower drum,
5. Endless filter medium, 6. Motor, 7. Sterilizing and acaricidal solution, 8. Tank,
9.. Water tank, 12.. Replenishment water tank, 13.. Chemical solution tank, 1
6. Heat exchange coil air bleed tap, 19. Cold and hot water outgoing pipe, 20. Cold and hot water transport pipe. 23...Liquid level detector, 24...Electric valve, 30...Spray nozzle, 31...Header.

Claims (3)

[Claims] (1) An anti-mold and anti-corrosion device for air conditioning equipment, which includes a sterilizing and acaricide-impregnated filter installed in the air intake path of the air conditioning equipment where organic materials are present on surfaces that come into contact with treated air. (2) A sterile acaricide-impregnated filter is a fibrous endless filter that is looped between a lower drum installed in a tank containing a sterile acaricide-containing liquid and an upper drum installed outside the tank. The mold and corrosion prevention device according to claim 1, wherein the endless filter is suspended between the drums and rotated by power. (3) The anti-mold and anti-corrosion device according to claim 2, further comprising a spray nozzle for spraying the sterilized acaricide-containing liquid onto the surface of the rotating endless filter above the tank.