JP2018200138A - Air conditioner operation method and net-like resin molding - Google Patents

Abstract

To provide an air conditioner operation method capable of increasing heat exchange efficiency in a heat exchanger by subjecting air introduced to the heat exchanger to charge control.SOLUTION: There is provided an air conditioner operation method capable of increasing heat exchange efficiency in a heat exchanger by subjecting air introduced to the heat exchanger to charge control. A plate-shaped net-like resin molding made of thermoplastic resin of polyethylene or polypropylene in which unsintered powder of montmorillonite-based clay mineral is dissolved, having vent holes penetrating in a thickness direction is provided so as to cross an air flow passage to the heat exchanger, and air is caused to pass through the vent holes and be introduced to the heat exchanger.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method of operating an air conditioner that can enhance heat exchange efficiency in a heat exchanger and a resin molded body used therefor, and in particular, charge control of air introduced into the heat exchanger and heat exchange efficiency in the heat exchanger The present invention relates to a method of operating an air conditioner that can improve the temperature and a resin molded body used for the method.

  There is an attempt to increase the operating efficiency of an air conditioner including this by increasing the heat exchange efficiency in the heat exchanger. Among such attempts, in the heat exchanger (condenser) of the outdoor unit of the air conditioner for cooling the heated circulating refrigerant, water is sprayed on the heat exchanger to evaporate (vaporize), and heat is generated by the heat of vaporization. Many methods for assisting heat removal on the surface of the exchanger have been proposed.

  On the other hand, Patent Document 1 discloses a method of reducing the temperature of wind sent to a heat exchanger (condenser) of an outdoor unit of an air conditioner by using the heat of vaporization of water. A porous honeycomb body made of a ceramic plate having a plurality of relatively large ventilation holes formed in the upstream side of the condenser fan and penetrating in a direction along the air flow of the fan is formed. While the water held in the pores is vaporized, the temperature of the wind to the condenser fan is lowered with a small amount of water, while the relatively large ventilation holes are provided to reduce the pressure loss of the wind. The heat exchange efficiency in the heat exchanger can be increased.

  Moreover, in patent document 2, in the heat exchanger of the air conditioner which has an air distribution system, from the composite material of the baking ceramic powder + resin which is given to the air distribution path and changes the temperature etc. of the air flow which passes through this A plate-like reticulated resin molded body is disclosed. Similar to Patent Document 1, such a reticulated resin molded body is a plate-shaped resin molded body having a thickness of about 2 to 3 mm having relatively large ventilation holes for suppressing the pressure loss of the wind. It is said that the heat exchange efficiency in the heat exchanger can be improved by adding about 20% of a powder obtained by crushing the fired ceramic obtained in a base material resin such as polyethylene.

  By the way, in recent years, the charged state of the charge in the pipes and the like forming the air flow path to the heat exchanger has an influence on the flow state of the air passing therethrough, and as a result, the heat conversion efficiency in the heat exchanger is reduced. It has been found to have an effect.

  For example, Patent Document 3 discloses a method for improving cooling efficiency by installing a self-discharge type static eliminator for preventing positive charges from being charged on a fan cover made of a non-conductive synthetic resin material in an automotive cooling device. doing. When the voltage value on the surface of the non-conductive thin wall increases, the air flow along the surface changes, and the air flow easily separates from the surface of the thin wall, and the cooling efficiency of the cooling device decreases. . Therefore, a self-discharge type static eliminator is installed to suppress this and control the air flow.

JP 2012-72951 A JP 2014-224621 A JP, 2006-117388, A

  Even in an indoor unit of an air conditioner, even when indoor air is sucked and heat exchange is performed by a heat exchanger and then returned to the room, a decorative (front) panel or the like facing the room is generally made of resin. Therefore, as in Patent Document 3, charging problems may occur. In this regard, if the resin molded body of Patent Document 2 is not clearly described but has a function of canceling the charged state, the turbulent air flow is controlled to the original ideal flow state, and as a result It can also be understood that the operating efficiency of the air conditioner is increased.

  The present invention has been made in view of the situation as described above, and an object of the present invention is to provide air conditioning that can control charging of air introduced into a heat exchanger and increase heat exchange efficiency in the heat exchanger. It is in providing the operating method of a machine, and the resin molding used for this.

  The present inventor not only pays attention to the physical property given to the air flow of the fired ceramic powder given to the resin molded body as in Patent Document 2, but rather pays attention to the resin. That is, at most, several tens of percent or more of the fired ceramic powder is contained from such a short air flow path just by passing an air flow in the thickness direction through a resin molded body having a thickness of about 2 to 3 mm. It is difficult to think of being greatly affected by the physical properties of the fired ceramic powder that can be bare on the surface of the air flow path of the resin. On the other hand, in order to increase the influence of the physical properties of the fired ceramic powder, it is not practical to give more fired ceramic powder to the resin molded body because resin molding becomes impossible. As a result of trial and error in such a situation, the present invention has been achieved.

  That is, the operation method of the air conditioner according to the present invention is an operation method of an air conditioner capable of increasing the heat exchange efficiency in the heat exchanger by controlling the charging of air introduced into the heat exchanger, and is not yet made of montmorillonite clay mineral. A reticulated resin molded body having a plate shape made of a thermoplastic resin of polyethylene or polypropylene in which the fired powder is dissolved and having a vent hole penetrating in the thickness direction is provided so as to cross the air flow path to the heat exchanger. The air is introduced into the heat exchanger through the vent hole.

  According to this method, the charge of air introduced into the heat exchanger can be controlled to improve the heat exchange efficiency in the heat exchanger.

  In the above-described invention, the reticulated resin molded body may be characterized in that when one main surface is at a ground potential, the other main surface has a negative potential. According to such a method, the air introduced into the heat exchanger can be reliably charged and the heat exchange efficiency in the heat exchanger can be improved.

  In the above-described invention, a planar opening ratio of the vent hole may be 70% or more. According to such a method, the flow of air introduced into the heat exchanger is not obstructed, and on the other hand, charging can be controlled even if the contact area with the air passing through the air exchanger is reduced, and the heat exchange efficiency in the heat exchanger can be improved. It can be increased.

  In the above-described invention, the reticulated resin molded body may be provided between a charged dust collecting filter and the heat exchanger. According to this method, it is possible to remove the influence of dust caused by the charged dust collecting filter and to reliably control the charge of the air introduced into the heat exchanger, thereby improving the heat exchange efficiency in the heat exchanger.

  The reticulated resin molded body according to the present invention is a plate-shaped thermoplastic resin that has a vent hole that penetrates in the thickness direction by controlling the charge of air introduced into the heat exchanger, and allows the air to pass therethrough. A reticulated resin molded body for introducing air into a heat exchanger, characterized in that it is made of a polyethylene or polypropylene thermoplastic resin in which an unfired powder of a montmorillonite clay mineral is dissolved.

  According to such a reticulated resin molded body, by using this, the charge of air introduced into the heat exchanger can be controlled and the heat exchange efficiency in the heat exchanger can be improved.

  In the above-described invention, when one main surface is set to the ground potential, the other main surface may have a negative potential. According to such a reticulated resin molded body, by using this, the air introduced into the heat exchanger can be reliably charged and the heat exchange efficiency in the heat exchanger can be improved.

In the above-described invention, the clay mineral may be contained in a range of 2 to 5% by mass ratio with respect to the thermoplastic resin. Further, the unfired powder may be characterized by pulverizing mudstone. Further, the mudstone may include at least 60 to 70 wt% of SiO ₂ and 10 to 15 wt% of Al ₂ O ₃ by mass ratio. According to such a reticulated resin molded body, by using this, the air introduced into the heat exchanger can be reliably charged and the heat exchange efficiency in the heat exchanger can be improved.

  In the above-described invention, a planar opening ratio of the vent hole may be 70% or more. According to such a reticulated resin molded body, by using this, the flow of air introduced into the heat exchanger is not obstructed, and on the other hand, charge control can be performed even if the contact area with the air passing through this is reduced. The heat exchange efficiency in the heat exchanger can be increased.

It is sectional drawing of the air conditioner used for one Example by this invention. It is (a) front view and (b) side view of a net-like resin molding. It is a flowchart which shows the manufacturing method of a net-like resin molding. It is a table | surface of the electric potential measurement result of a net-like resin molding. It is sectional drawing which shows the example of arrangement | positioning of a net-like resin molding.

  An operation method of an air conditioner as one embodiment according to the present invention will be described with reference to FIGS. 1 and 2.

  As shown in FIG. 1, an air conditioner 10 includes a grill 1 attached to an air suction port, a filter 2, a net-like resin molded body 3, and a heat exchanger 4 arranged in order in an air flow path 5. . In particular, the reticulated resin molded body 3 is disposed so as to cross the air flow path 5 to the heat exchanger 4. Here, since it is the same as that of a well-known air conditioner except for the net-like resin molded body 3, the description is omitted.

  Referring also to FIG. 2, the reticulated resin molding 3 is made of a thermoplastic resin of polyethylene (hereinafter referred to as PE) or polypropylene (hereinafter referred to as PP) in which an unfired powder of montmorillonite clay mineral is dissolved. It is a plate-like body having a large number of circular ventilation holes 31 penetrating in the thickness direction. Moreover, the net-like resin molded body 3 may be appropriately provided with a blind portion 32 and a crosspiece 33 that are not provided with the vent hole 31. In the present embodiment, blind portions 32 are provided at the four corners, and crosspieces 33 are provided at the center in the vertical and horizontal directions. Further, the crosspiece 33 may be appropriately provided with a through hole (not shown) as long as the strength is not impaired.

  Here, when the air conditioner 10 is operated, the air is sucked into the air flow path 5 from the suction port by a fan (not shown), passes through the grill 1 and the filter 2, and further passes through the mesh-shaped resin molded body 3 to perform heat exchange. It is introduced into the vessel 4 and exchanges heat with the medium inside it on the surface of the heat exchanger 4 such as fins.

  In the air conditioner 10, it has been found that the heat exchange efficiency can be improved by arranging the reticulated resin molded body 3 so as to cross the air flow path 5 to the heat exchanger 4. Although details of the mechanism are unknown, it is considered that the reticulated resin molded body 3 can control charging of air introduced into the heat exchanger 4 as follows.

  For example, in general, the grill and the filter are made of a non-conductive material, and are easily charged positively with the operation of the air conditioner. When air passes through a positively charged grill or filter, as described in Patent Document 3, the air is positively charged to form a flow different from the originally intended one. The heat exchange efficiency in a heat exchanger will be reduced.

  On the other hand, the reticulated resin molded body 3 is a resin in which clay minerals are dissolved, and it has been confirmed that it is easy to stably obtain a negative potential, so that the charged state of positively charged air is relaxed. It is considered that the charging is controlled. Thereby, it is considered that the air flow can be brought close to what was originally intended, and the heat exchange efficiency lowered by positively charging the air can be improved to approach the original heat exchange efficiency.

  Here, it is preferable that the vent hole 31 of the net-like resin molded body 3 has a plane opening ratio of 70% or more because the air flow introduced into the heat exchanger 4 is not hindered. The vent hole 31 may be a hexagon instead of a circle in plan view.

  A method for producing such a reticulated resin molded body 3 will be described with reference to FIG.

  As shown in FIG. 3, a reticulated resin molded body 3 made of a thermoplastic resin in which clay mineral is dissolved can be obtained by, for example, injection molding. Specifically, first, mudstone containing unfired montmorillonite clay mineral is pulverized with a crushing device to an average particle size of, for example, 5 to 10 μm to obtain a powder, and mixed with PE or PP at a predetermined ratio. Then, a mudstone pellet containing clay mineral is prepared (S1). Subsequently, the resin pellet which consists of either PE or PP used for preparation of a mudstone pellet, and a mudstone pellet are mix | blended by a predetermined | prescribed ratio, and a mixed pellet is obtained (S2). This mixed pellet is put into an injection molding machine, and the clay mineral powder is kneaded with the resin while melting the resin inside the injection molding machine, and then injected into the mold of the reticulated resin molding 3 to be molded (S3). . Thus, by obtaining the reticulated resin molded body 3, the thermoplastic resin forming the reticulated resin molded body 3 can contain dissolved clay minerals. Thus, by dissolving the clay mineral, air charging can be controlled over the entire surface of the reticulated resin molded body 3. That is, it is intended not to simply disperse the clay mineral particles in the resin, but to change the properties of the resin by dissolving the clay mineral in the resin.

  The thermoplastic resin forming the reticulated resin molded body 3 has a small effect of air charge control when the amount of clay mineral contained is small, and the effect of charge control is saturated when the amount of clay mineral is large and the reticulated resin molded body. 3 is difficult to mold. It is preferable that the clay mineral is contained in an amount of 2 to 10% by mass ratio with respect to the entire thermoplastic resin, and more preferably 2 to 5%.

Montmorillonite has a chemical composition of (Na, Ca) _0.33 (Al, Mg) ₂ Si ₄ O ₁₀ (OH) ₂ .nH ₂ O, but mudstone containing montmorillonite clay mineral is SiO ₂ or Al. _{In addition to} containing a large amount of ₂ O ₃ as a main oxide, other oxides such as Na ₂ O, MgO, SO ₃ , K ₂ O, CaO, TiO ₂ and FeO are also included. Here, the mudstone for obtaining the montmorillonite clay mineral as described above preferably contains at least 60 to 70 wt% of SiO ₂ and 10 to 15 wt% of Al ₂ O ₃ by mass ratio. With such a component composition, a large amount of montmorillonite is contained, and the effect of air charge control can be obtained with certainty.

  Since the potential measurement of the reticulated resin molded body 3 was performed, the result will be described with reference to FIG.

  First, using PE as a resin, a portion around one vent hole 31 of a reticulated resin molding 3 produced by containing 10% by mass of a montmorillonite clay mineral is cut into a substantially annular shape, A test piece was obtained. The test piece is placed on a ground electrode made of a copper plate, the lower main surface is set to the ground potential, and the upper surface, which is the main surface on the opposite side, has two potentials in the upper and lower positions (that is, the upper surface). Were measured at two locations facing each other in the horizontal direction), and turned upside down and measured at two locations in the same manner. The measurement results are shown in FIG. 4 “Example”. For the measurement, a surface potential meter (Isoprobe-model 244) manufactured by Monroe Electronics Co., Ltd. and its probe (model 1017) were used. Further, as a “comparative example”, an annular body was similarly cut out from a molded body made of only PE having the same shape as that of the reticulated resin molded body 3, and the electric potential was measured in the same manner as shown in FIG.

  As shown in FIG. 4, in the “example”, a negative potential is stably shown on the main surface opposite to the ground potential on one main surface. On the other hand, the “comparative example” is unstable because it partially includes a positive potential. In addition, the average value of the potentials at the four locations in total is larger in absolute value as the negative potential in the “Example”. In other words, according to the “Example” that includes the clay mineral dissolved therein, when one main surface is set to the ground potential, the other main surface stably has a negative potential. That is, according to the reticulated resin molded body 3 according to the “Example”, the charge control can be performed so as to relax the charged state of the positively charged air.

  In general, clay minerals are negatively charged and have a cation exchange capacity. However, montmorillonite clay minerals have a relatively large cation exchange capacity, thereby making the reticulated resin molding 3 stable to a negative potential. Can be considered. Moreover, it is thought that it can disperse | distribute finely and disperse | distribute inside a thermoplastic resin by being an unbaking body. This is because when the ceramic powder, which is a fired body, is dispersed, the light transmittance is lost in either PE or PP, but the reticulated resin molded body 3 in which the unfired powder of clay mineral is dissolved is light transmissive. It is because it does not lose its sex.

  A specific arrangement of the reticulated resin molded body 3 in the air conditioner will be described with reference to FIG.

  As shown in FIG. 5, the air conditioner 20 is a ceiling-embedded indoor unit. The main body 21 is embedded in the ceiling 11 and includes a motor 22 and a fan 23 rotated by the motor 22 inside. By the rotation of the fan 23, air is sucked from the lower chamber through the suction port 12 at the center lower part of the main body 21, introduced into the heat exchanger 4 on the outer peripheral side, and exchanges heat, and the outlet 13 on the outer peripheral side. Is returned to the room. Here, the grill 1 and the filter 2 are fitted into the suction port 12 in order from the bottom, and the reticulated resin molded body 3 is disposed thereon so as to cross the air flow path toward the heat exchanger 4.

  By adopting such an arrangement, even if the sucked air is positively charged by the grill 1 or the filter 2, the reticulated resin molded body 3 arranged between the grill 1 or the filter 2 and the heat exchanger 4 can be used. Charge control can be performed so as to relax the charged state of the positively charged air by passing it through.

  Further, even when the filter 2 is a charged dust collecting filter that positively charges the air passing therethrough, the reticulated resin molded body 3 is disposed between the filter 2 and the heat exchanger 4, so that the charged state of the positively charged air is It is possible to control the charging so as to relax.

  Further, the reticulated resin molded body 3 is arranged so as to cross the air flow path to the heat exchanger of the air conditioner, so that it can be an air conditioner of another type, or an indoor unit or an outdoor unit. However, the heat exchange efficiency can be improved.

  As mentioned above, although the Example by this invention and the modification based on this were demonstrated, this invention is not necessarily limited to these examples. In addition, those skilled in the art will be able to find various alternative embodiments and modifications without departing from the spirit of the present invention or the scope of the appended claims.

3 Reticulated resin molding 4 Heat exchanger 5 Air flow path 10, 20 Air conditioner

Claims (10)

A method of operating an air conditioner that can charge-control air introduced into a heat exchanger and increase heat exchange efficiency in the heat exchanger,
An air flow to the heat exchanger is a plate-like resin molded body having a vent hole penetrating in the thickness direction and made of a polyethylene or polypropylene thermoplastic resin in which an unfired powder of montmorillonite clay mineral is dissolved. A method for operating an air conditioner, characterized in that the air is fed so as to cross a path, and the air is introduced into the heat exchanger through the vent hole.   The method for operating an air conditioner according to claim 1, wherein the net-like resin molded body has a negative potential on the other main surface when one main surface is set to the ground potential.   The method for operating an air conditioner according to claim 1 or 2, wherein a planar opening ratio of the ventilation hole is set to 70% or more.   The method for operating an air conditioner according to any one of claims 1 to 3, wherein the net-like resin molded body is provided between a charged dust collecting filter and the heat exchanger. Ventilation hole that is used in the operation method of an air conditioner that can control the charge of air introduced into the heat exchanger and increase the heat exchange efficiency in the heat exchanger, and is a plate made of a thermoplastic resin and penetrates in the thickness direction A reticulated resin molded body that passes through this and introduces air into the heat exchanger,
A reticulated resin molded article comprising a thermoplastic resin of polyethylene or polypropylene in which an unfired powder of a montmorillonite clay mineral is dissolved.   6. The reticulated resin molded article according to claim 5, wherein when one main surface is set to ground potential, the other main surface has a negative potential.   The reticulated resin molded product according to claim 6, comprising the clay mineral in a range of 2 to 5% by mass ratio with respect to the thermoplastic resin.   The reticulated resin molded product according to claim 7, wherein the unfired powder is obtained by pulverizing mudstone. 9. The reticulated resin molded body according to claim 8, wherein the mudstone contains at least 60 to 70 wt% of SiO ₂ and 10 to 15 wt% of Al ₂ O ₃ by mass ratio.   10. The reticulated resin molded body according to claim 5, wherein a planar opening ratio of the vent hole is 70% or more.

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