JP2010096458A - Filter for heat exchange - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter for heat exchange capable of improving heat exchanging efficiency by reducing ventilation resistance when the air passes therethrough, without reducing a contact area of the passing air and the water. <P>SOLUTION: A ventilation section of the filter 1 for heat exchange is constituted by supporting a plurality of filter blades 3 to which the water is supplied, to a frame body 2 in a state of being arranged in the blind shape. The passing air F is partially supplied to the filter blades 3 and flows with heat exchanging action with the retained water. On this occasion, the contact area for heat exchange of the filter blades 3 can be sufficiently widely secured. The remaining passing air F flows to a pathways respectively between the filter blades 3, 3 and thus, the ventilation resistance of the air flowing in the entire filter for heat exchange can be reduced. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is used in, for example, an auxiliary cooling device that indirectly cools a heat dissipating part of a condenser of a refrigeration cycle, a vaporizing humidifier, a chiller, or the like, and performs heat exchange between passing air and supplied water. The present invention relates to a replacement filter.

  Conventionally, an auxiliary cooling device provided for an air-cooled outdoor unit (condenser) used in a refrigeration cycle such as an air conditioner / refrigerator / refrigerator, a vaporizer / humidifier that supplies moisture to the passing air and sends it as humidified air, or In a device such as a cool air cooler that cools passing air with water and sends it out as cold air, a heat exchanging filter that exchanges heat between the passing air and supplied water is used.

As an example of the auxiliary cooling device, the present applicant has already arranged a mat provided with a filter having air permeability facing the heat radiating portion of the condenser, and allowed the cooling water to flow downward from the upper portion of the mat. And what has cooled the air suck | inhaled by the thermal radiation part is proposed (refer patent document 1).
Japanese Patent Laid-Open No. 2004-3806

  The above heat exchange filter is configured, for example, by depositing resin fibers in a non-woven fabric so as not to increase the ventilation resistance. Further, in order to improve the water retention of the filter, there has been proposed a mat in which a large number of fine protrusions are implanted on the surface of a filter substrate via an adhesive.

  However, if the ventilation resistance of air is large due to the fiber density of the filter, etc., there is a problem that the energy for heat exchange increases and the operation efficiency of the entire apparatus decreases, and the ventilation resistance of the air is reduced. If the fiber density of the filter is made coarser in order to reduce it, there is a problem that the chance of contact with water decreases when air passes through the filter, the amount of water evaporation per unit area decreases, and the heat exchange efficiency decreases. is there.

  Accordingly, an object of the present invention is to reduce the ventilation resistance when the air passes without reducing the contact area between the passing air and the supplied water, thereby improving the heat exchange efficiency between the passing air and the water. It is to provide a heat exchange filter that can be used.

  In order to solve the above-described problems, the present invention provides a heat exchange filter that makes heat exchange with the air by bringing the air passing through the ventilation portion into contact with water supplied to the ventilation portion and evaporating the water. And the said ventilation part is comprised by the some filter blade | blade arranged in the blind shape, It is characterized by the above-mentioned.

  According to this heat exchange filter, since a plurality of filter blades to which water is supplied are arranged in a blind shape, a part of the air passing therethrough exchanges heat with water supplied to and held by the filter blades. Flows with action. At this time, it is possible to ensure a sufficiently large contact area for heat exchange of the filter blades. The remaining passing air flows through the passage between the filter blades, thereby reducing the ventilation resistance of the air flowing through the entire heat exchange filter.

  Since the heat exchange filter according to the present invention is configured as described above, it is possible to reduce the ventilation resistance when air passes without reducing the contact area between the passing air and water. The heat exchange efficiency between the passing air and water can be improved without reducing the operating efficiency of the equipment to which is applied.

  Hereinafter, embodiments of a heat exchange filter according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing an embodiment of a heat exchange filter according to the present invention. The present embodiment is an example in which the heat exchange filter according to the present invention is used in an auxiliary cooling device attached to a condenser of a refrigeration cycle.

  First, an outline of a refrigeration cycle in which the present heat exchange filter is applied as an auxiliary cooling device will be described with reference to FIG. The refrigeration cycle 40 includes a compressor 41, an evaporator 42, an expansion valve 43, a dryer 44, a condenser 45, and a refrigerant pipe 46 connecting them. The water supply device 50 includes, for example, a water supply pipe 51 that communicates with the water pipe, an electromagnetic valve 52 that is interposed in the water supply pipe 51 and serves as an on-off valve for shutting off or passing the tap water, and opening and closing the electromagnetic valve 52. A thermostat 53 to be controlled and a sensor 54 for measuring the temperature of the air flowing into the auxiliary cooling device 30 are provided. The air sucked into the condenser 45 by the fan 47 is cooled because the cooling water supplied to the auxiliary cooling device 30 and flowing down is deprived of latent heat when passing through the auxiliary cooling device 30.

  According to this configuration, when the sensor 54 senses that the temperature of the intake air is equal to or higher than the set value, the thermostat 53 operates to open and close the electromagnetic valve 52. When the electromagnetic valve 52 is opened, tap water is supplied from the water supply pipe 51 to the auxiliary cooling device 30 through a watering nozzle (not shown), and the condenser 45 is cooled in the above-described manner. Since it is an indirect cooling system that cools the air for cooling the heat dissipating fins of the condenser 45, corrosion and scale adhesion do not occur unlike when water is directly applied to the heat dissipating fins. In addition, since the auxiliary cooling device 30 can be retrofitted to a conventional condenser, it can be installed without significantly modifying existing equipment, and can be easily attached and detached for maintenance. It is.

  The auxiliary cooling device 30 includes the heat exchange filter 1 shown in FIG. The heat exchange filter 1 includes a frame body 2 and a plurality of filter blades 3 supported in a state of being arranged in a blind shape on the frame body 2. The heat exchange filter 1 has a horizontal configuration in which a plurality of filter blades 3 constituting a ventilation portion are arranged in a state extending in the horizontal direction. In addition, although not shown in figure, the heat exchange filter 1 is installed in the uppermost part of the frame 2 so as to extend laterally and has a water spray pipe in which many water spray holes for spraying cooling water are formed, and water supply connected to the water spray pipe. A water supply facility comprising a pipe and water supply equipment such as a pump and a water supply valve is attached. The cooling water supplied to the uppermost filter blade 3 is sequentially dropped onto the lower filter blade 3, and the cooling water is distributed to all the filter blades 3.

  In the embodiment shown in FIG. 1, a large number of filter blades 3 (a part of which is denoted by reference numeral 3) are arranged in the vertical direction, and are arranged with a distance between adjacent filter blades 3. Each filter blade 3 is installed at an angle θ with respect to the flow direction of the passing air F indicated by an arrow. Thus, a passage 4 for the passing air F is secured between the adjacent filter blades 3. Since most of the passing air F flowing through the passage 4 is not strongly affected by the surface of the filter blade 3, the ventilation resistance is significantly larger than when the filter is formed so as to cover the entire opening surface of the frame 2. To reduce. A number of short protrusions are formed on the surface of the filter blade 3 in order to hold the supplied water, which will be described later.

  Part of the flow of the passing air F flows through the surface of the filter blade 3 and contacts the cooling water supplied to the surface to vaporize the cooling water, thereby performing heat exchange. The passing air F is cooled by removing latent heat from the passing air when the water evaporates. Although the area occupied by the filter blade 3 in the opening area of the frame 2 is not large, the filter blade 3 is inclined at an angle θ with respect to the ventilation direction, so that the passing air F can contact the cooling water on the filter blade 3. A sufficient area is secured.

  Each filter blade 3 is detachably attached to the frame 2. When the filter blade 3 is damaged or excessive clogging occurs, it can be replaced individually. In addition, the inclination angle θ of the filter blade 3 is fixed at a fixed angle when the filter blade 3 is attached to the frame body 2. Instead, the angle is changed when the filter blade 3 is attached to the frame body 2. It is also possible to select and configure the tilt angle to be variable after installation. When making the mounting angle variable, it is preferable that the angle of one filter blade 3 is changed so that the angles of all the other filter blades 3 are automatically changed to the same angle.

  Since the cooling water also permeates the back surface side of the filter blade 3, both the front and back surfaces of the filter blade 3 come into contact with a part of the passing air F and heat exchange can be performed. Therefore, the passing air can be efficiently cooled.

  FIG. 2 is a perspective view showing another embodiment of the heat exchange filter according to the present invention. The heat exchange filter 1a shown in FIG. 2 is composed of a frame body 2a and a plurality of filter blades 3a installed side by side on the frame body 2a. This heat exchange filter 1a has a vertical configuration in which a plurality of filter blades 3a constituting a ventilation portion are arranged in a state extending in the vertical direction. A passage 4a through which the passing air F passes is formed between the adjacent filter blades 3a, 3a. Other configurations and operations are the same as those of the heat exchange filter 1 shown as a horizontal type in FIG.

  3-6 is a perspective view which shows the example of the filter blade | wing which comprises the ventilation part of the filter for heat exchange by this invention, and each has expanded and shown a part. The filter blade 23a shown in FIG. 3 includes a base material 24a and a number of flocked fibers 26a planted in a protruding shape on the surface of the base material 24a by the adhesive layer 25a (details of the adhesive layer and the flocked fibers). Will be described later). The base material 24a is a plate material made of a metal plate or the like and substantially free of holes, and does not have air permeability. The flocked fiber 26a has high water retention and high hydrophilicity, and the cooling water supplied to the front side of the inclined base material 24a quickly permeates the back side of the base material 24a. The base 24b of the filter blade 23b shown in FIG. 4 has a net-like shape, and is configured by stretching wires vertically and horizontally, and has a grid-like eye 27b that can be ventilated. Around the wire material, a large number of protruding flocked fibers 26b are planted by an adhesive layer 25b. The base 24c of the filter blade 23c shown in FIG. 5 is a plate material in which a large number of holes 27c such as punching metal are formed, and a large number of protruding flocked fibers 26c are planted on both the front and back surfaces via an adhesive layer 25c. It is installed.

  Since the base materials 24a to 24c of the filter blades 23a to 23c are rigid per se, they can be attached to the frame bodies 2 and 2a directly or via brackets. Further, even if the base materials 24a to 24c themselves are rigid, a highly rigid blade frame is attached to the peripheral edge of each of the base materials 24a to 24c and is attached to the frames 2a and 2b via the blade frames. You can also In the case of the filter blades 23b and 23c formed of a member having air permeability such as a perforated material such as a mesh material or punching metal, air can pass through the mesh 27b and the holes 27c. Ventilation resistance can be further reduced.

  The filter blade 23d shown in FIG. 6 is formed by using a base material 24d that is configured as a non-woven mat by entwining fibers and fixing the peripheral edge to the blade frame 28. That is, since the nonwoven fabric-like mat itself cannot be expected to be rigid, the nonwoven fabric-like base material 24d is fixed to the blade frame 28 that surrounds the periphery. The filter blade 23d is fixed to the frame body 2 via the blade frame 28. The fiber base material 24d is planted with a flocked fiber 26d through an adhesive layer.

  As shown in FIG. 7, the mat in the non-woven fabric state is formed by alternately arranging dense portions 12 and sparse portions 13 each having a rectangular extension having a vertical dimension of about 10 mm and a horizontal dimension of about 20 mm. It is preferable that the columns 11 are connected. In each column 11, the dense portion 12 and the sparse portion 13 are slightly shifted up and down (about 5 mm) so as not to be adjacent to each other. The dots and thick lines displayed in black schematically show the flow and the dripping state of the cooling water. Since the dense portion 12 and the sparse portion 13 are formed separately, the pressure loss of the entire air passing through the filter blade 23d is lower than that of other structures. Accordingly, the suction resistance of cooling air is reduced, and an increase in the amount of suction air can be expected.

  FIG. 8 is an enlarged schematic view showing a part of the fibers constituting the mat of the filter blade 23d. FIG. 8 (a) is a diagram showing one fiber, and FIG. 8 (b) is the same diagram (a). FIG. 8C is a diagram further enlarging the portion B of the fiber shown in FIG. 8A. FIG.

  The fiber base material 24d of each fiber has a uniform cross section and extends elongated, and is made of, for example, PVC (polyvinyl chloride). The fiber base 24d has a circular cross section as shown in FIG. 8B, and an adhesive layer 25d made of a self-extinguishing adhesive is formed on the surface thereof by dipping, coating, spraying, or the like. As the protrusions to be planted on the surface of the fiber base material 24d to which the adhesive layer 25d has been applied, a large number of piles, that is, flocked fibers 26d are planted. For example, polyclerk (vinylon 50% + PVC 50% synthetic fiber; product name: Corderan) can be used as the flocked fiber 26d. The fiber diameter φ is an example, but the length is about 0.013 mm. It is about 5 mm.

  Planting the flocked fibers 26d on the surface of the fiber base 24d can be performed by an electrostatic flocking method. When the fiber substrate 24d provided with the adhesive layer 25d is passed through an electrostatic field, the innumerable flocked fibers 26d released into the electrostatic field are like a needle due to electrostatic attraction in the electric field. The adhesive layer 25d is pierced in a state where it crosses the surface perpendicularly and is arranged in an orderly manner. By drying the adhesive layer 25d, the flocked fibers 16d are firmly fixed to the surface of the fiber substrate 24d. The adhesive constituting the adhesive layer 25d has self-extinguishing properties, and details thereof will be described later. Therefore, the surface of the fiber base material 24d is evenly grown, and when cooling water is supplied to the filter by watering or the like, the fine particles of the cooling water are between the flocked fibers 26d or to some flocked fibers 26d. It is held across.

  The filter is manufactured using an intermediate material in which the fiber base material 24d is formed into a flat and long strip-like nonwoven fabric having a width of about 2 m and a length of about 10 m, for example. Such an intermediate material is handled, for example, wound in a roll shape in the length direction. As the electrostatic flocking device for performing electrostatic flocking on the intermediate material, an existing one can be used, and thus the cost required for the production facility can be reduced. FIG. 9 is a schematic view showing an example of an electrostatic flocking device. In the present embodiment, a high DC voltage is applied between the electrodes 18a and 18b in the high voltage generator 18 shown in FIG. 9, and countless flocked fibers 26d are inserted between the electrodes 18a and 18b from the flocked fiber spraying device 19a. The electric field E is scattered. The flocked fibers 26d are aligned in parallel by electrostatic attraction along the electric field due to the Coulomb force, and pierce the adhesive layer 25d on the surface of the fiber base 24d previously applied by the adhesive application device 19b. In such a manufacturing method, innumerable flocked fibers 26d can be planted very easily and in an orderly manner on the surface of the fiber base 24d, so that productivity is very high.

  By implanting a large number of flocked fibers 26d on the surface of the fiber base material 24d, the fine particles of the cooling water are very easily held on the surface of the fiber base material 24d. The particulate water easily evaporates, and the amount of latent heat taken away from the air passing through the filter is dramatically improved. Therefore, the passing air can be sufficiently cooled, and the condenser of the refrigeration cycle can be effectively cooled. In addition, by masking the intermediate material, the adhesive layer 25d is partially formed on the intermediate material, so that when the intermediate material passes through the electrostatic field, the flocked fiber 26d is applied to the adhesive layer 25d. It can be adhered only to the fiber base material 24d in the formed region. Thus, by performing electrostatic flocking only on the necessary part of the filter, the amount of flocked fiber 26d and adhesive 25d used can be reduced, and the cost can be reduced.

  Regardless of the type of the plate shown in FIG. 3, the mesh shown in FIG. 4, the perforated panel shown in FIG. 5, or the mat shown in FIGS. When the materials 24a, 24b, 24c, and 24d) are made of resin, they are made of self-extinguishing resin.

  The substrate 24 may be a self-extinguishing (flame retardant) material or a non-flammable (flammable) material, but a material having self-extinguishing properties is preferable from the viewpoint of safety. . Examples of the self-extinguishing material include polyvinyl chloride (PVC) and polyvinylidene chloride (PVDC). Examples of non-self-extinguishing materials include polypropylene (PP) and polyethylene terephthalate (PET). Here, the self-extinguishing property refers to the property that the flame disappears by itself when the fire type is moved away even if ignited by the initial fire type.

  In the above-described embodiment, the flocked fiber 26d as a protrusion is a polyclark (product name: Cordylan), but the polyclark is a synthetic fiber of 50% vinylon and 50% polyvinyl chloride and is self-extinguishing (flame retardant). Sex). However, generally, the material of the flocked fiber (pile) that is a protrusion is not only a self-extinguishing material, but may also be a non-self-extinguishing material. Examples of non-self-extinguishing flocked fiber materials include regenerated cellulose (rayon) and 6 nylon (nylon). The flocked fiber is preferably a rayon pile. Rayon pile has high hydrophilicity, and even when it is used repeatedly, the performance of retaining the cooling water that has flowed down hardly deteriorates.

  In the present embodiment, when the base materials 24a to 24d are not self-extinguishing, the adhesive used for the adhesive layers 25a to 25d for planting the flocked fibers 26a to 26d as projections on the surfaces of the base materials 24a to 24d. Is self-extinguishing. The self-extinguishing adhesive can be obtained by adding a flame retardant to an appropriate non-self-extinguishing adhesive such as acrylic, urethane, epoxy, or vinyl acetate. Examples of the flame retardant include an organic flame retardant and an inorganic flame retardant. Examples of the organic flame retardant include brominated compounds, phosphorus compounds, and chloride compounds. Examples of the inorganic flame retardant include antimony compounds and metal oxides. The self-extinguishing adhesive preferably contains 15% by weight or more of such a flame retardant in order to exhibit necessary self-extinguishing properties.

  In the heat exchange filter, if the adhesive used to plant the flocks may burn, even if the base materials 24a to 24d are made of a flame retardant material, The material will burn. That is, if the adhesive is not self-extinguishing, it will continue to burn when the adhesive ignites, and as a result, regardless of whether the base material or protrusion material has self-extinguishing properties. Will burn as a filter. In the present invention, since the adhesive for planting protrusions (flocking) on a base material having no self-extinguishing property is a self-extinguishing material, the filter is usually attached to an outdoor unit installed outdoors. When considering the situation, it is also very convenient in terms of safety.

  FIG. 10 shows still another embodiment of the heat exchange filter according to the present invention. FIG. 10 shows a flocking tape 33 for forming filter blades used in still another embodiment of the heat exchange filter according to the present invention. The flocking tape 33 is applied to the outermost release paper 34, the adhesive layer 35 to which the release paper 34 is detachably attached, the base sheet or nonwoven fabric 36 to which the adhesive layer 35 is applied, and the base 36. The hair-implanting adhesive layer 37, and the flocked fibers 38 planted in the adhesive layer 37. The release paper 34 is peeled off, and the flocking tape 33 can be attached to the filter blade bases 24a, 24b, 24c, and 24d by the adhesive layer 35. If the flocking tape 33 is used, the heat exchange filter can be configured very simply and inexpensively by sticking to various base materials such as existing blind blades, even if it is not a dedicated base material. .

  Although the example in which the heat exchange filter according to the present invention is applied to the auxiliary cooling device provided in the condenser of the refrigeration cycle has been described above, the heat exchange filter according to the present invention is not limited to the auxiliary cooling device. Vaporizing humidifiers in which the air passing through the heat exchanger is humidified by water supplied to the heat exchange filter, or cool air coolers in which the air passing through the heat exchange filter is cooled by water supplied to the heat exchange filter Obviously it is applicable. In addition, various modifications can be made to the above embodiment without departing from the gist of the present invention.

The perspective view which shows one Example of the filter for heat exchange by this invention. The perspective view which shows another Example of the filter for heat exchange by this invention. The perspective view which expands and shows an example of the filter blade | wing which comprises the filter for heat exchange by this invention, and its one part. The perspective view which expands and shows another example of the filter blade | wing which comprises the filter for heat exchange by this invention, and its one part. The perspective view which expands and shows another example of the filter blade | wing which comprises the filter for heat exchange by this invention, and its one part. The perspective view which expands and shows another example of the filter blade | wing which comprises the filter for heat exchange by this invention, and its one part. The schematic diagram which shows an example of the mat | matte of the nonwoven fabric state which comprises the filter blade | wing shown in FIG. The schematic diagram which expands and shows a part of fiber which comprises the mat | matte of the filter blade | wing shown in FIG. Schematic which shows an example of an electrostatic flocking apparatus. The schematic cross section of the flocked tape for forming the filter blade | wing used for the Example of the filter for heat exchange by this invention. Schematic which shows an example of the refrigerating cycle to which the filter for heat exchange by this invention was applied as an auxiliary | assistant cooling device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1a Heat exchange filter 2,2a Frame 3,3a Filter blade 4,4a Passage 11 Column 12 Dense part 13 Sparse part 18 High voltage generator 18a, 18b Electrode 19a Flocking fiber disperser 19b Adhesive application device 23a, 23b, 23c, 23d Filter blades 24a, 24b, 24c, 24d Base materials 25a, 25b, 25c, 25d Adhesive layers 26a, 26b, 26c, 26d Flocked 27b Grid-like eyes 27c Hole 28 Blade frame 30 Auxiliary cooling device 33 Filter blade 34 Release paper 35 Adhesive layer 36 Base sheet or nonwoven fabric 37 Adhesive layer 38 Flocked fiber 40 Refrigeration cycle 41 Compressor 42 Evaporator 43 Expansion valve 44 Dryer 45 Condenser 46 Refrigerant pipe 47 Fan 50 Water supply device 51 Water supply pipe 52 Solenoid valve 53 Thermostat 54 Sensor F Passing air θ Angle Electric field

Claims (14)

  A heat exchange filter for contacting the air passing through the ventilation section with water supplied to the ventilation section and evaporating the water to exchange heat with the air, wherein the ventilation section is arranged in a blind shape. A filter for heat exchange, comprising a plurality of filter blades.   2. The heat according to claim 1, wherein each of the filter blades includes a base material and a large number of fine protrusions formed on the surface of the base material to hold the supplied water. Replacement filter.   The heat exchange filter according to claim 2, wherein the substrate has air permeability.   4. The heat exchange filter according to claim 3, wherein the base material is a plate material having a large number of through holes.   4. The heat exchange filter according to claim 3, wherein the base material is a net material.   6. The heat exchange filter according to claim 2, wherein the protrusion is a flocked fiber.   7. The heat exchange filter according to claim 6, wherein the protrusions are planted on the base material by a self-extinguishing adhesive.   The heat exchange filter according to claim 6 or 7, wherein the flocked fibers are planted on the substrate by electrostatic flocking.   3. The heat exchange filter according to claim 2, wherein the protrusion is formed by sticking a flocking tape having a flocked fiber provided on a surface thereof to the base material.   The filter for heat exchange according to any one of claims 1 to 9, wherein an inclination angle of the filter blade with respect to a ventilation direction can be changed.   By changing the inclination angle with respect to one ventilation direction of the plurality of filter blades, the inclination angles of all other filter blades are automatically changed to the same inclination angle. The heat exchange filter according to claim 10.   It is disposed opposite to the outside air intake port of the condenser of the refrigeration cycle, and is used in an auxiliary cooling device that indirectly cools the heat radiating portion of the condenser by cooling the outside air sucked into the outside air inlet port. The heat exchange filter according to claim 1, wherein the heat exchange filter is a heat exchange filter.   The heat exchange filter according to any one of claims 1 to 11, wherein the heat exchange filter is used in a vaporizing humidifier that humidifies passing air to obtain humidified air.   The heat exchange filter according to any one of claims 1 to 11, wherein the heat exchange filter is used in a cool air cooler that cools air passing therethrough to make cold air.

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