JP4639762B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner, and more particularly to an air conditioner that can maximize the bacteriostatic effect in the drain pan (in other words, the effect of inhibiting bacterial growth).

  A general air conditioner includes a heat exchanger and a blower, and a drain pan that receives drain water is provided below the heat exchanger. Bacteria grow on the drain water in the drain pan. There are many.

  When bacteria propagate in the drain water, slime is generated, which causes a problem of generating a strange odor and clogging of the drain pipe.

  In order to cope with the above problems, an antibacterial agent is put in a drain pan and immersed in drain water to prevent the generation of bacteria (see Patent Document 1).

JP 2000-74409.

  By the way, although the antibacterial agent differs depending on the type of the antibacterial agent to be used, there is a necessary minimum concentration that exhibits a bacteriostatic effect. If the concentration is higher than the necessary minimum concentration, a sufficient bacteriostatic effect is exhibited. However, if the concentration is too high, a large amount of antibacterial agent is required, and the antibacterial agent is consumed wastefully. Usually, it is assumed that the above-mentioned minimum required concentration can be secured even under the worst conditions (for example, the conditions where the antimicrobial agent elution concentration is the lowest) within the range of use conditions and that the bacteriostatic effect can be exhibited over the service life. The amount of antibacterial agent soaked is to be determined.

  Further, the drain water flows toward the drain side in the drain pan during the cooling operation, but stays in the drain pan during the operation stop. For this reason, the elution characteristic of an antibacterial agent changes with the states of drain water. Therefore, unless the amount of the necessary antibacterial agent is determined after grasping the elution characteristics, the antibacterial agent is consumed wastefully.

  Hereinafter, the elution characteristics will be described in detail. The elution characteristics when the antibacterial agent is installed on the side opposite to the drainage are as shown in FIG. 12 in the case of static drain water (that is, when drain water is not discharged), and running water drain water (that is, drain water is being discharged). The case is as shown in FIG. Here, in FIG. 12 and FIG. 13, the straight line A shows the case where the antibacterial agent immersion amount is small, the straight line B shows the case where the antibacterial agent immersion amount is W1 and W2, and the straight line C shows the case where the antibacterial agent immersion amount is large. Show.

  According to the above results, as shown in FIG. 12, in the static drain water, the amount of antibacterial agent for securing the antibacterial agent concentration on the drainage side is required, so the antibacterial agent concentration is higher than necessary on the anti-drainage side. In running drain water, the flow of drain water goes from the anti-drainage side to the drainage side, so the change in antibacterial agent concentration is very small. As shown in FIG. 13, the minimum concentration of antibacterial agent on the drainage side is secured. Even so, the concentration of antibacterial agent on the anti-drainage side does not become too high.

  On the other hand, the elution characteristics when the antibacterial agent is installed on the drain side are as shown in FIG. 14 in the case of static drain water and as shown in FIG. 15 in the case of running drain water. Here, in FIG. 14 and FIG. 15, the straight line A shows the case where the antibacterial agent immersion amount is small, the straight line B shows the case where the antibacterial agent immersion amount is W1 and W2, and the straight line C shows the case where the antibacterial agent immersion amount is large. Show.

  According to the above results, as shown in FIG. 14, in the static drain water, the antibacterial agent concentration is opposite to that in FIG. 12, the antibacterial agent concentration becomes higher than necessary on the drainage side, and in the running drain water Since the flow of drain water is directed from the anti-drainage side to the drainage side, in order to secure the antibacterial agent concentration on the anti-drainage side, concentration diffusion against the flow is required. As shown in FIG. As a result, the concentration of the antibacterial agent on the drainage side becomes very high.

  Next, the elution characteristics when the antibacterial agent is installed at an intermediate position between the anti-drainage side and the drainage side are as shown in FIG. 16 in the case of stationary drain water, and in FIG. 17 in the case of running drainage water. As shown. Here, in FIG. 16 and FIG. 17, curve A shows the case where the antibacterial agent immersion amount is small, curve B shows the case where the antibacterial agent immersion amount is W1 and W2, and curve C shows the case where the antibacterial agent immersion amount is large. Show.

  According to the above results, as shown in FIG. 16, the concentration of the antibacterial agent on the drainage side and the anti-drainage side is equal in the static drain water, and is the maximum at the intermediate position between them. As the flow goes from the anti-drainage side to the drainage side, as shown in FIG. 17, the drainage side has almost no change in concentration as in FIG. 13, but the anti-drainage side ensures the antibacterial agent concentration as in FIG. As a result, if the antibacterial agent concentration on the anti-drainage side is ensured, the antibacterial agent concentration on the central part and the drainage side will become very high.

  As described above, the amount of antibacterial agent required varies depending on the installation position of the antibacterial agent and the state of the drain water (that is, whether it is static drain water or running water drain water). This causes a problem of consumption.

  The present invention has been made in view of the above points, and by devising the installation position of the antibacterial agent (for example, antibacterial agent) in the drain pan, a sufficient amount of bacteriostatic effect can be exhibited with a minimum amount of the antibacterial agent. The purpose is to do so.

In the present invention, as a first means for solving the above-mentioned problems, an air conditioner comprising a heat exchanger 6 and a blower 7 and having a drain pan 8 for receiving the drain water D below the heat exchanger 6. The drain pan 8 has a minimum necessary antibacterial agent concentration in a stationary state where the drain water D in the drain pan 8 is not drained from the middle position of the distance from the drain position to the farthest position. The amount of the antibacterial agent 19 necessary and sufficient to match the amount of the antibacterial agent 19 necessary and sufficient to ensure the necessary minimum antibacterial agent concentration in the flowing water state in which the drain water D in the drain pan 8 is discharged. An antibacterial agent 19 is arranged.

  By configuring as described above, the minimum antibacterial agent concentration can be secured with a small amount of the antibacterial agent over the entire area of the drain pan 8 in both the static drain water and the flowing drain water. Therefore, a sufficient bacteriostatic effect can be exhibited in the entire drain pan 8, and generation of slime is effectively suppressed.

  By the way, the relationship between the installation position of the antibacterial agent 19 and the amount of the required antibacterial agent when the minimum concentration of the required antibacterial agent was secured at the position farthest from the installation position of the antibacterial agent 19 was investigated in static drain water and running drain water. The result shown in FIG. 3 was obtained. According to this, it is necessary to dispose the antibacterial agent 19 on the side opposite to the drainage side from the intermediate position P1 of the distance from the drainage position in the drain pan 8 while keeping the amount of the antibacterial agent small and sufficient bacteriostatic effect. It turns out that it is preferable in obtaining. Moreover, the disposition position of the antibacterial agent 19 is determined such that the amount of the antibacterial agent 19 necessary and sufficient to ensure the necessary minimum antibacterial agent concentration in a state where the drain water D in the drain pan 8 is not discharged, and the drain pan 8 Since it is set at the position P where the amount of the antibacterial agent 19 necessary and sufficient to secure the necessary minimum antibacterial agent concentration in the state where the drain water D is discharged, it is sufficient while minimizing the necessary antibacterial agent amount. A bacteriostatic effect can be obtained.

  In the present invention, as a second means for solving the above problems, the antibacterial agent 19 can be attached to the edge 8a of the drain pan 8 in the air conditioner provided with the first means. In such a case, the antibacterial agent 19 can be attached using the edge 8a of the drain pan 8, and the structure can be simplified.

  In the present invention, as a third means for solving the above problems, in the air conditioner including the first means, the antibacterial agent 19 can be attached to the heat exchanger 6, When comprised in this way, the antibacterial agent 19 can be attached using the heat exchanger 6, and the structure can be simplified.

According to the first means of the present invention, in the air conditioner provided with the heat exchanger 6 and the blower 7 and provided with the drain pan 8 for receiving the drain water D below the heat exchanger 6, the drain pan 8 The antibacterial agent 19 is disposed on the anti-drain side from the middle position of the distance from the drainage position to the farthest position in the water, and the amount is small throughout the drain pan 8 in both the static drain water and the running drain water. Since the minimum antibacterial agent concentration can be secured with the amount of antibacterial agent, a sufficient bacteriostatic effect can be exerted in the entire drain pan 8, and the slime generation can be effectively suppressed. In addition, the disposition position of the antibacterial agent 19 is determined such that the amount of the antibacterial agent 19 necessary and sufficient to ensure the necessary minimum antibacterial agent concentration in a stationary state where the drain water D in the drain pan 8 is not discharged, and the drain pan 8 Since the amount of the antibacterial agent 19 necessary and sufficient to ensure the necessary minimum antibacterial agent concentration is set in the flowing water state in which the drain water D is discharged, the amount of the required antibacterial agent is minimized. There is an effect that a sufficient bacteriostatic effect can be obtained.

  As in the second means of the present invention, in the air conditioner provided with the first means, the antibacterial agent 19 can be attached to the edge 8a of the drain pan 8, and when configured as such, The antibacterial agent 19 can be attached using the edge 8a of the drain pan 8, and the structure can be simplified.

  As in the third means of the present invention, in the air conditioner provided with the first means, the antibacterial agent 19 can also be attached to the heat exchanger 6. The antibacterial agent 19 can be attached using the vessel 6, and the structure can be simplified.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

  The air conditioner according to the present embodiment is a ceiling-embedded air conditioner, and is located above the rectangular opening 1 formed in the ceiling F as shown in FIG. The air conditioner main body 3 is supported by being suspended from a purlin (not shown) via suspension bolts 2 and 2, and a decorative panel 4 covering the opening 1.

  The air conditioner main body 1 has a heat exchanger 6 and a blower 7 disposed in a substantially rectangular parallelepiped casing 5, and drain water D falling from the heat exchanger 6 below the heat exchanger 6. A drain pan 8 is provided for receiving the water. Reference numeral 9 is a bell mouth, and 10 is an air passage.

  The decorative panel 4 has a rectangular shape that is large enough to cover the opening 1, and an air suction port 11 is formed at the center of the decorative panel 4. Four air outlets 13 communicating with the passage 10 are formed.

  The heat exchanger 6 has a substantially annular shape having an open portion 14, and is, for example, a cross fin coil type heat exchanger.

  As shown in FIG. 2, the drain pan 8 has a substantially annular shape having an open portion 15 so as to correspond to the shape of the heat exchanger 6, and has a U-shaped cross section. A drain pump 16 that pumps up the drain water D is disposed on one end side of the drain pan 8. Therefore, in the present embodiment, in the drain pan 8, the side where the drain pump 16 is disposed is the drainage side, and the opposite side is the anti-drainage side. Reference numeral 17 denotes a discharge pipe of the drain pump 16, and 18 denotes a drain pipe provided on-site.

  The antibacterial agent 19 is disposed in the drain pan 8 while being immersed in the drain water D. As described above, the position of the antibacterial agent and the state of the drain water (that is, static drain water or running water drain) Since the amount of antibacterial agent required varies depending on the water), there is a problem that the antibacterial agent is wasted depending on the installation position of the antibacterial agent.

  Therefore, in the present embodiment, the antibacterial agent is disposed on the anti-drainage side from the middle position of the distance from the drainage position in the drain pan 8 (ie, the anti-drainage position).

  In this way, the minimum antibacterial agent concentration can be ensured with a small amount of the antibacterial agent over the entire area of the drain pan 8 in both the static drain water and the flowing drain water. Therefore, a sufficient bacteriostatic effect can be exhibited in the entire drain pan 8, and generation of slime can be effectively suppressed.

  By the way, the relationship between the installation position of the antibacterial agent and the amount of the required antibacterial agent when the minimum concentration of the required antibacterial agent is secured at the position farthest from the installation position of the antibacterial agent 19 was investigated in static drain water and running drain water. The result shown in FIG. 3 was obtained. In FIG. 3, the broken line X indicates the case in static drain water, the straight line Y indicates the case in flowing drain water, and the broken line Z needs to ensure the minimum concentration of the necessary antibacterial agent at the position farthest from the installation position of the antibacterial agent 19. The amount of antibacterial agent is shown. According to this, it is necessary to dispose the antibacterial agent 19 on the anti-drainage side from the intermediate position P1 of the distance from the drainage position in the drain pan 8 (that is, the anti-drainage position) while keeping the necessary antibacterial agent amount small. It can be seen that it is preferable for obtaining a sufficient bacteriostatic effect.

Considering from the results of FIG. 3, the antibacterial agent 19 necessary and sufficient to secure the necessary minimum antibacterial agent concentration in a state where the drain water D in the drain pan 8 is not discharged is considered. Of the antibacterial agent 19 necessary and sufficient to ensure the necessary minimum antibacterial agent concentration in a state where the drain water D in the drain pan 8 is discharged (that is, the broken line X and the straight line Y are It can be seen that setting to (intersection position) P is desirable in order to obtain a sufficient bacteriostatic effect while minimizing the amount of necessary antibacterial agent.

  By the way, the antibacterial agent has, for example, a large number of apertures as shown in the front view of FIG. 4 (a), the internal enlarged view of (b) and the plan view of FIG. .. Are arranged as an antibacterial unit K containing granular or pellet-shaped antibacterial agents 19, 19... In a cylindrical holding container 20 having portions 21, 21. As shown in the figure, (B) internal enlarged view and FIG. 7 (A) plan view, (B) internal enlarged view, in the sheet-shaped holding container 20 having a large number of apertures 21, 21,. Are arranged as an antibacterial unit K containing a granular or pellet-shaped antibacterial agent 19, 19,. In addition, as shown to the internal enlarged view of FIG.7 (c), the holding | maintenance container 20 may be comprised with the net-like member which welded the outer peripheral part. In these cases, the size of the opening 21 is smaller than the particle diameter or pellet diameter of the antibacterial agent 19. The holding container 20 may have a shape other than the above (for example, a polygonal cylindrical shape or an elliptical cylindrical shape), and a wall surface of the holding container 20 such as a net, a porous material, a nonwoven fabric, a punching plate, etc. As long as it is possible to enter / exit water without a simple opening), it may be anything. Further, the shape of the aperture may be anything. The holding container 21 may be made of a material that is generally insoluble in water, such as metal, synthetic resin, and cloth. Furthermore, the holding container 20 may or may not be self-supporting (that is, a container that can hold the shape of the container itself) (for example, a container that cannot hold the shape of the container itself, such as a bag).

  Further, as shown in the front view of FIG. 8 (a), the internal enlarged view of (b), the plan view of FIG. 9 (a), and the internal enlarged view of (b), the holding material 22 made of a material such as synthetic resin. May be arranged as an antibacterial agent unit K constituted by kneading the antibacterial agents 19, 19,. In this case, the shape of the holding member 22 may be any of a cylindrical shape, a polygonal column shape, an elliptical column shape, a sheet shape, and the like. Furthermore, an antibacterial agent may be kneaded into the coating layer made of synthetic resin or the like formed on the inner surface of the drain pan 8.

  Next, the attachment aspect of the above-described antibacterial agent unit K will be described.

  For example, as shown in FIG. 10, it may be attached to the edge 8a of the drain pan 8 so as to be hooked through an inverted U-shaped attachment component 24. As shown in FIG. Even if it is attached so as to be sandwiched between the fins 25 constituting the heat exchanger, it is attached so as to be sandwiched between the horizontal U-shaped attachment parts 27 in the heat transfer tubes 26 constituting the heat exchanger 6 as shown in FIG. May be.

It is a longitudinal cross-sectional view of the air conditioner concerning embodiment of this invention. It is a top view of the drain pan in the air conditioner concerning embodiment of this invention. Characteristic diagram showing the results of investigating the relationship between the position of the antibacterial agent and the amount of the required antibacterial agent when the minimum concentration of the required antibacterial agent is secured at the position farthest from the installation position of the antibacterial agent, in static drain water and running drain water It is. BRIEF DESCRIPTION OF THE DRAWINGS The usage example I of the antibacterial agent used in the drain pan in the air conditioner concerning embodiment of this invention is shown, (A) is a front view, (B) is an internal enlarged view. BRIEF DESCRIPTION OF THE DRAWINGS The usage example I of the antibacterial agent used in the drain pan in the air conditioner concerning embodiment of this invention is shown, (A) is a top view, (B) is an internal enlarged view. The usage example II of the antibacterial agent used in the drain pan in the air conditioner concerning embodiment of this invention is shown, (A) is a front view, (B) is an internal enlarged view. The usage example II of the antibacterial agent used in the drain pan in the air conditioner concerning embodiment of this invention is shown, (A) is a top view, (B) is an internal enlarged view. The usage example III of the antibacterial agent used in the drain pan in the air conditioner concerning embodiment of this invention is shown, (A) is a front view, (B) is an internal enlarged view. It shows the usage example III of the antibacterial agent used in the drain pan in the air conditioner according to the embodiment of the present invention, (A) is a plan view, (B) is an internal enlarged view, and (C) is a deformation. It is an internal enlarged view which shows an example. It is a principal part expanded sectional view which shows the attachment form I of the antibacterial agent used in the drain pan in the air conditioner concerning embodiment of this invention. It is a principal part expanded sectional view which shows the attachment form II of the antibacterial agent used in the drain pan in the air conditioner concerning embodiment of this invention, When (b) is inserted in the fin of a heat exchanger, (b) is The case of attaching to the heat exchanger tube of the heat exchanger is shown. It is a characteristic view which shows the elution characteristic of the antibacterial agent in static drain water at the time of installing an antibacterial agent on the anti-drain side of the drain pan. It is a characteristic view which shows the elution characteristic of the antibacterial agent in flowing drain water at the time of installing an antibacterial agent on the anti-drain side of the drain pan. It is a characteristic view which shows the elution characteristic of the antibacterial agent in stationary drain water at the time of installing an antibacterial agent in the drainage side of a drain pan. It is a characteristic view which shows the elution characteristic of the antibacterial agent in flowing drain water at the time of installing an antibacterial agent on the drain side of the drain pan. It is a characteristic view which shows the elution characteristic of the antibacterial agent in still drain water when an antibacterial agent is installed in the middle position of the anti-drain side and drainage side of a drain pan. It is a characteristic view which shows the elution characteristic of the antibacterial agent in running water drainage water at the time of installing an antibacterial agent in the middle position of the anti-drain side and drainage side of a drain pan.

6 is a heat exchanger 7 is a blower 8 is a drain pan 8a is an edge 19 is an antibacterial agent D is drain water

Claims (3)

An air conditioner comprising a heat exchanger (6) and a blower (7), and provided with a drain pan (8) for receiving drain water (D) below the heat exchanger (6), wherein the drain pan In (8), the minimum antibacterial agent required in a stationary state that is on the side opposite to the drainage side from the middle position of the distance from the drainage position to the farthest position and in which the drain water (D) in the drain pan (8) is not discharged. Antibacterial agent necessary and sufficient to ensure the necessary minimum antibacterial agent concentration in the flowing water state in which the amount of antibacterial agent (19) necessary and sufficient to ensure the concentration and drain water (D) in the drain pan (8) is discharged An air conditioner characterized in that an antibacterial agent (19) is disposed at a position where the amount of (19) matches. The air conditioner according to claim 1, wherein the antibacterial agent (19) is attached to an edge (8a) of the drain pan (8). The air conditioner according to claim 1, wherein the antibacterial agent (19) is attached to the heat exchanger (6).

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