JP3744208B2 - Air purifier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air cleaning apparatus for removing formaldehyde, volatile organic compounds (VOC) generated from various indoor odors, building materials, furniture, etc. generated in a living environment, and allergen particles floating in the air. .
[0002]
[Prior art]
Conventionally, as an air cleaning device having this kind of function, there is one as described in Japanese Patent Laid-Open No. 3-68419. As shown in FIG. 5, this device has a configuration in which an electrostatic filter 2, a deodorizing device 3, and a blower fan 4 are provided inside an air cleaning device main body 1, and the deodorizing device 3 sandwiches an adsorbent 6 with an oxidation catalyst 5. In such a configuration, a heater 7 of a heating wire is arranged on the outer side. When the blower fan 4 is operated with this configuration, air containing pollutant gas in the room is guided from the airflow inlet to the inside of the air cleaning device main body 1 and is removed by adsorbing the pollutant gas to the adsorbent 6. The contaminant particles are removed by being trapped by the electrostatic filter 2 to purify the air. On the other hand, in the deodorizing device 3, when the adsorbent 6 is saturated by the adsorption of the pollutant gas, the blower fan 4 is stopped, and the adsorbent 6 and the oxidation catalyst 5 are heated by energizing the heater 7 to adsorb to the adsorbent 6. Remove the contaminated gas. This desorbed polluted gas was purified by oxidative decomposition by the oxidation catalyst 5 activated by heating, and the adsorbent 6 was regenerated.
[0003]
[Problems to be solved by the invention]
However, the conventional air cleaning apparatus heats the oxidation catalyst 5 and the adsorbent 6 with the heater 7 in the regeneration process of the adsorbent 6. However, since the distance between the heater wires constituting the heater 7 is large, the oxidation catalyst 5 and There is a problem that when the adsorbent 6 is likely to have temperature unevenness and a polluted gas that is difficult to decompose passes through a low temperature portion of the oxidation catalyst 5, the undecomposed gas is released as it is. In order to decompose the pollutant gas having a relatively high decomposition temperature, the oxidation catalyst 5 also needs to have a high temperature. However, before the oxidation catalyst 5 reaches the activation temperature at which it functions as a catalyst, the pollutant gas is desorbed from the adsorbent 6. Therefore, there is a problem that undecomposed gas is released as it is.
[0004]
In addition, since the temperature of the oxidation catalyst 5 and the adsorbent 6 is likely to be uneven when heating by the heater 7 composed of heater wires, the activation temperature and the adsorption function that function as a catalyst for the entire oxidation catalyst 5 and the adsorbent 6 in a short time. In order to raise the temperature above the desorption temperature of the contaminated gas, there is a problem that the power consumption of the heater 7 is increased.
[0005]
Further, since most of the oxidation catalyst 5 and the adsorbent 6 are heated by radiation from the heater 7, the thermal efficiency is poor, and the activation temperature of the oxidation catalyst 5 and the desorption temperature of the polluted gas adsorbed on the adsorbent 6 are reduced. Since it takes time to raise the temperature, the time required for the regeneration process is increased, and the air cleaning operation is shortened.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a blowing means for introducing air into a purified air passage, a capturing means for capturing pollutant particles and contaminated gas contained in the air inside the purified air passage, A heating means for heating the capturing means; and a decomposing means for decomposing and purifying the gas generated from the capturing means, wherein the decomposing means comprises an outer frame made of two plate-like insulators having an opening at a substantially central portion; The outer frame body and the inner frame have an inner frame made of at least one plate-like insulator having an opening substantially in the center, and a folded structure at the end of the middle frame body so as to sandwich the middle frame body A porous electric heating element set so as to face the opening of the body, and a plate-like insulator of a certain width between each layer of the porous electric heating element are arranged so that the width direction is substantially parallel to the air flow And at least one spacer and the porous electric heating element. An inner frame provided on a side surface, a porous catalyst body supporting at least one layer of catalyst disposed on at least one surface of the outer frame body, and the porous catalyst body with the outer frame body The decomposition unit is composed of a plate-shaped catalyst outer frame body having an opening at a substantially central portion so as to be sandwiched.
[0007]
According to the above invention, the porous electric heating element constituting the decomposition unit in the regeneration process has a heating area substantially equal to that of the porous catalyst body, and the two are arranged close to each other. It can be heated uniformly, and the entire porous catalyst body can be heated to an activation temperature that functions as a catalyst in a short time, and the porous electric heating element itself that has been heated to a high temperature also has a gas decomposition action. Therefore, most of the gas generated from the trapping means can be decomposed and high purification performance can be realized. Further, since the temperature can be raised in a short time, the power consumption can be reduced, the regeneration time can be shortened, and the power saving of the apparatus and the time of the air purification operation can be lengthened.
[0008]
Further, by setting the porous electric heating element in a folded configuration, the heat generation area of the porous electric heating element can be enlarged, so that heat exchange with the passing air can be improved, and the porous catalyst heating element can be raised. The temperature can be made faster. Also, when the odd number of turns is made, the connection terminal and the lead wire can be taken out from the same direction, and the lead wire can be minimized in the housing, thereby simplifying the device configuration.
[0009]
In addition, by configuring the frame of the disassembly unit with an insulator, the shape of the porous electric heating element can be maintained, and electrical insulation with other structural members can be maintained, and safety can be ensured. . Further, since the heat radiation from the porous electric heating element to the member forming the purification air passage is suppressed by the frame, the decomposition unit itself can be kept at a high temperature, and the heat insulating structure can be simplified.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The present invention includes a housing having a purification air passage inside, a blowing means for introducing air into the purification air passage, and at least contamination particles and contamination gas contained in the air provided in the purification air passage. Capture means for capturing one of them, heating means for incinerating or desorbing contaminated particles captured by the capture means, and decomposing and purifying the gas generated from the capture means disposed above the capture means Disassembling means, and the disassembling means includes an outer frame body made of two plate-like insulators having an opening at a substantially central portion, and an intermediate frame body made of at least one plate-like insulator having an opening at a substantially central portion. And a porous electric heating element set so as to face the opening of the outer frame and the middle frame, with a folded structure at the end of the middle frame so as to sandwich the middle frame, A plate with a certain width between each layer of the electric heating element At least one spacer which is formed of an edge and is arranged so that a width direction thereof is substantially parallel to the air flow, an inner frame provided on a side surface of the porous electric heating element, and at least the outer frame A plate-shaped catalyst outer frame having an opening at a substantially central portion disposed so as to sandwich the porous catalyst body between the outer frame body and a porous catalyst body supporting a catalyst disposed on one surface It consists of a disassembly unit consisting of
[0011]
In the regeneration process, the porous electric heating element constituting the decomposition unit has a heating area substantially equal to that of the porous catalyst body, and both are disposed close to each other, so that the porous catalyst body is heated uniformly. It is possible to raise the temperature of the entire porous catalyst body to an activation temperature that functions as a catalyst in a short time, and the porous electric heating element itself has a gas decomposition action, so that most of the generated gas can be decomposed. And high purification performance can be realized. Further, since the temperature can be raised in a short time, the power consumption can be reduced and the reproduction time can be shortened.
[0012]
Further, by setting the porous electric heating element in a folded configuration, the heat generation area of the porous electric heating element can be expanded, so heat exchange with the passing air is improved, and the temperature of the porous catalyst body can be increased more quickly. can do. Further, when the odd number of turns is made, it is possible to take out the connection terminal and the lead wire from the same direction, minimizing the routing of the lead wire in the housing, and simplifying the device configuration.
[0013]
Furthermore, by constituting the frame of the disassembly unit with an insulator, the shape of the porous electric heating element can be maintained and the electrical insulation with other structural members can be maintained, and safety can be ensured. . Further, since the heat radiation from the porous electric heating element to the member forming the purification air passage is suppressed by the frame, the decomposition unit itself can be kept at a high temperature, and the heat insulating structure can be simplified.
[0014]
Also, a housing having a purification air passage inside, a blowing means for introducing air into the purification air passage, and at least one of contamination particles and contamination gas contained in the air provided in the purification air passage Capture means for trapping, heating means for incinerating or desorbing contaminated particles captured by the capture means, and decomposition means for decomposing and purifying gas generated from the capture means disposed above the capture means The disassembling means includes an outer frame body made of two plate-like insulators having an opening at a substantially central portion, and an intermediate frame body made of at least one plate-like insulator having an opening at a substantially central portion. A porous electric heating element configured to have a folded structure at an end of the middle frame so as to sandwich the middle frame, and to face the opening of the outer frame and the middle frame, and the electric A plate-shaped insulator with a constant width between each layer of the heating element At least one or more spacers arranged so that the width direction is substantially parallel to the air flow, an inner frame provided on a side surface of the electric heating element, and at least one surface of the outer frame A plate-shaped catalyst outer frame having an opening at a substantially central portion disposed so as to sandwich the porous catalyst body sandwiched between the porous catalyst body and at least one layer of catalyst disposed thereon It is comprised by the some decomposition | disassembly unit which consists of a body, and it is set as the structure which the some said decomposition | disassembly unit arrange | positioned in parallel physically, and was connected electrically in series.
[0015]
By disposing a plurality of decomposition units in parallel, the amount of gas generated from the capturing means per unit volume of the decomposition unit can be reduced, so that the decomposition performance of the generated gas can be improved. In addition, since the air passage area can be increased, the pressure loss at the disassembling means is reduced, the blowing means can be reduced in size, and the operating sound when the blowing means is operated can be reduced.
[0016]
In addition, since the disassembly units are electrically connected in series, when a part of the porous heating element is disconnected, the entire disassembly unit is not energized, making it easy to detect disconnection and preventing abnormal operation of the device. be able to.
[0017]
In addition, a catalyst is supported on a porous electric heating element.
And since the porous electric heating element itself can also exert a catalytic function, the decomposition performance of the generated gas can be further improved, and the decomposition temperature of the gas generated from the trapping means can be lowered by the catalyst. The set temperature of the disassembling means can be lowered, power saving can be achieved, and the device configuration and the heat insulating structure can be simplified.
[0018]
Further, at least one of the porous electric heating element and the porous catalyst body has a wave-like configuration.
[0019]
And, when the porous electric heating element has a wave configuration, the heat generation area can be expanded, so that heat exchange with the passing air is improved, and the temperature of the porous catalyst body can be increased more quickly. The decomposition performance of the generated gas can be improved. In addition, since the wavy length and wavy interval can be set freely, the resistance value of the porous heating element can be set arbitrarily, and the degree of freedom in designing the heating element can be increased. On the other hand, when the porous catalyst body has a wave configuration, the area functioning as a catalyst can be increased, so that the contact efficiency with the generated gas can be improved, and the purification performance can be greatly improved.
[0020]
In addition, since the apparent dimensions can be greatly reduced, the size and thickness of the device can be reduced.
[0021]
The skeletons of the porous electric heating element and the porous catalyst body are made of a heat-resistant metal having a network structure.
[0022]
And since heat conductivity can be improved, it becomes possible to make temperature distribution of a porous electric heating element and a porous catalyst body more uniform, and stable gas purification performance can be obtained, and as an electric heating element Can be easily designed, and high productivity can be obtained.
[0023]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0024]
Example 1
FIG. 1 is a perspective view of an air cleaning device according to a first embodiment of the present invention. In the figure, reference numeral 11 denotes a purification air passage provided inside the air purification device main body, and the inside of the purification air passage 11 captures a trapping means 12 for trapping contaminant particles such as house dust, bacteria, mold, pollen in the air. And heating means 13 for heating the trapping means 12 disposed below the trapping means 12 to incinerate the trapped contaminant particles, and heat reflection for efficiently transferring the heat generated by the heating means 13 to the trapping means 12. Means 14 and a decomposing means 15 for decomposing gas generated at the time of incineration of the contaminated particles disposed above the capturing means 12 are provided. A blower means 16 made of a sirocco fan is attached to the upper part of the purification air passage 11, and air containing indoor pollutant particles flows in from the suction port 17 made of a punching metal plate or the like by this blower means 16, and the purification wind The air that has passed through the passage 11 and has been purified from the outlet 18 is returned to the room.
[0025]
For the capturing means 12, a filter made of a porous ceramic sheet such as alumina or silica fiber or a non-woven fabric of heat-resistant metal fibers is applied for the purpose of capturing contaminating particles.
[0026]
FIG. 2 is a perspective view of a main part of the disassembling means 15 applied to the air cleaning device of the present invention. In the figure, reference numeral 19 denotes a disassembling unit showing a specific configuration of the disassembling means 15. Reference numeral 20 denotes an outer frame made of two plate-like insulators having an opening 21a at a substantially central portion, and 22 denotes an intermediate frame made of a plate-like insulator having an opening 21b at a substantially central portion. 23 is a porous heating element that carries a catalyst and is processed into a wave shape. The porous heating element 23 is folded back at the end of the middle frame body 22 so as to sandwich the middle frame body 22, and the outer frame body 20 and the middle frame It is set so as to face the opening of the body 22 (the porous heating element 23 is actually connected at the folded mountain portion). Reference numeral 24 denotes a spacer made of a plate-like insulator. A plate-like insulator having a constant width C is arranged between the porous electric heating elements 23 so that the width direction is substantially parallel to the air flow. An inner frame 25 made of a plate-like insulator is provided on the side surface of the porous electric heating element 23. After inserting the inner frame body 25 into the groove 26 of the inner frame body 22, the claw 28 of the inner frame body 25 is inserted into the groove 27 of the outer frame body 20 to fix the porous heating element 23. Further, a porous catalyst body 29 carrying a catalyst and a plate-like catalyst outer frame body 31 having an opening 30 at a substantially central portion are arranged on the outer frame body 20 on the opposite side of the porous heating element 23, and the catalyst The claw 28 of the inner frame body 25 is inserted into the groove 32 of the outer frame body 31 to fix the porous catalyst body 29 and integrated as the decomposition unit 19. Further, electrode plates 33 for supplying electric power are provided at both ends of the porous electric heating element 23, and lead wires 34 are connected to the electrode plates 33.
[0027]
FIG. 3 is an enlarged schematic view of a cross section of the porous heating element 23 and the porous catalyst body 29 constituting the decomposition unit 19 (decomposing means 15) of the present invention. The porous catalyst body 23 and the porous catalyst body 29 are The skeleton is composed of a heat-resistant metal 35 having a network structure through which air can flow, and a porous layer 36 of an oxide such as alumina for expanding the surface area is formed on the surface, and Cu, It is configured to support a metal or metal oxide catalyst 37 such as Mn, Co, Fe, Ni, Ag, Pd, and Pt. An expanded metal plate is used as the heat-resistant metal 35 having a network structure.
[0028]
Next, the operation and action will be described.
First, in the dust collection mode, when the power is turned on, the dust collection mode is activated by a command from a control means (not shown). That is, the sirocco fan which is the air blowing means 16 is operated, and air containing pollutant particles in the room flows into the purification air passage 11 from the suction port 16 and is heated, trapped, and decomposed 15 (multi-layer porous touch). It passes in the order of medium 20). Contaminated particles contained in the air are trapped by the trapping means 12 made of a filter, and the purified air passes through the blower means 16 and is returned to the room from the outlet 18. While this dust collection mode is operating, the heating means 13 and the decomposition means 15 do not operate, and only the removal of contaminant particles contained in the air is performed.
[0029]
Next, in the regeneration mode, when the operation is performed for a predetermined time in the dust collection mode, the regeneration mode is activated by a control means (not shown). First, the air blowing means 16 is stopped, and the porous electric heating element 23 constituting the heating means 13 and the decomposition means 15 is caused to generate heat. The capturing unit 12 is heated by the air heated by the heating unit 13 and the radiation from the heating unit 13, and incinerates the contaminated particles captured by the capturing unit 12. The gas generated at the time of incineration is guided to the decomposition means 15 and is already activated by heating of the catalyst 37 supported on the porous heating element 23 and the porous electric heating element 23 constituting the decomposition means 15. The catalyst 37 supported on the catalyst body 29 is oxidatively decomposed into harmless carbon dioxide and water vapor, and the purified air is discharged into the room through the outlet 18. When the incineration of the contaminated particles trapped by the trapping means 12 is completed and no gas is generated, the heating of the heating means 13 and the decomposition means 15 is stopped by a command from the control means, and the regeneration mode is ended. By repeating the dust collection mode and the regeneration mode, the contamination particles can be purified without maintenance.
[0030]
During the regeneration mode operation, the gas generated from the trapping means 12 by the heating means 13 rises to an activation temperature at which the porous electric heating element 23 carrying the catalyst 37 constituting the decomposition unit 19 which is the decomposition means 15 functions as a catalyst. Although it is decomposed and purified by heating, if the concentration of the generated gas is high, there is a possibility that undecomposed gas is released without being completely decomposed. In the present invention, a porous catalyst pair 29 having a catalyst 37 supported thereon is disposed on the porous heating element 23. The porous catalyst body 29 is heated by the porous electric heating element 23 to activate the catalyst. The generated gas can be completely decomposed by being heated to a temperature. Further, the porous electric heating element 23 has a heating area substantially equal to that of the porous catalyst body 29, and both are disposed close to each other, so that the porous catalyst body 29 can be heated uniformly, and the porous catalyst body 29 can be heated. Since the entire temperature can be raised to the activation temperature of the catalyst in a short time, the power consumption can be reduced and the regeneration time can be shortened, so that the power saving of the device and the time of the air purification operation can be increased. it can.
[0031]
Also, as shown in FIG. 2, the porous electric heating element 23 is folded so that the heat generation area of the porous electric heating element 23 can be expanded, so that heat exchange with the passing air is improved and the porous electric heating element 23 is porous. The temperature of the catalyst body 29 can be further increased. Further, when the porous electric heating element 23 is folded back oddly, it is possible to take out the connection terminal and the lead wire from the same direction, minimizing the routing of the lead wire in the housing, and simplifying the device configuration. it can.
[0032]
Further, by forming the outer frame body 20, the inner frame body 22, the inner frame body 25, and the spacer 24 of the decomposition unit 19 that is the decomposition means 15 with insulators, the shape of the porous electric heating element 23 can be maintained and other Electrical insulation with the structural member can be maintained, and safety can be ensured. In addition, since the heat dissipation from the porous electric heating element 23 and the porous catalyst body 29 to the member forming the purification air passage is suppressed by the frame body, the decomposition unit 19 itself can be kept at a high temperature, and the heat insulating structure Simplification can be achieved.
[0033]
Further, by supporting the catalyst 37 on the porous electric heating element 23, the porous electric heating element 23 itself can also exert a catalytic function, so that the decomposition performance of the generated gas can be further improved. Since the decomposition temperature of the gas generated from the trapping means 12 can be lowered, the set temperature of the decomposition unit 19 which is the decomposition means 15 can be lowered, power saving is achieved, and the apparatus configuration and the heat insulation structure are simplified. Can be achieved.
[0034]
Further, by forming the porous electric heating element 23 in a wave shape, the heat generation area can be expanded, so that heat exchange with the passing air is improved and the temperature of the porous catalyst body 29 can be increased more quickly. At the same time, the decomposition performance of the generated gas can be improved. In addition, since the wavy length and wavy interval can be set freely, the resistance value of the porous heating element 23 can be set arbitrarily, and the degree of freedom in designing the heating element can be increased. Furthermore, since the apparent dimensions can be significantly reduced, the device can be made smaller and thinner.
[0035]
In addition, the heat conductivity can be improved by configuring the heat-resistant metal 35 having a network structure as the skeleton of the porous electric heating element 23 and the porous catalyst element 29 with an expanded metal plate. In addition, the temperature distribution of the porous catalyst body 29 can be made more uniform, a stable gas purification performance can be obtained, the design as an electric heating element can be easily performed, and high productivity can be obtained. Can do.
[0036]
In the embodiment, an expanded metal plate is used as the heat-resistant metal having a network structure which is a skeleton of the electric heating element 23 and the porous catalyst body 29. However, the present invention is not limited to this. Boards can be used. Further, a ceramic material such as heat-resistant mica is applied to each frame body and spacer made of a plate-like insulator.
[0037]
(Example 2)
FIG. 4 is a perspective view of a main part of the disassembling means 15 applied to the air cleaning device according to the second embodiment of the present invention. In the figure, the porous electric heating element 23 and the porous catalyst body 29 described in Example 1 are not fixed, and the respective frames and spacers made of a plate-like insulator having an electric insulating function are omitted. The structure of the body 23 and the porous catalyst body 29 is shown.
[0038]
A significant difference from the first embodiment is that two disassembly units described in the first embodiment are used. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description. As shown in FIG. 4, the disassembling unit has two corrugated and folded porous electric heating elements 23 arranged in parallel, and the lower two electrode plates 33 are electrically conductive, such as a metal plate. The connecting plate 38 is electrically connected in series by welding or the like, and the upper electrode plate 33 is connected to a lead wire for supplying power, and a catalyst is disposed above the two porous electric heating elements 23. In this configuration, a wavy porous catalyst body 29 carrying 37 is disposed.
[0039]
By disposing the decomposition units 19 in parallel, the amount of gas generated from the capturing means 12 per unit volume of the decomposition means 19 can be reduced, so that the decomposition performance can be improved. In addition, since the air passage area can be enlarged, the pressure loss of the disassembly hand unit 19 can be reduced, the air blowing means 16 can be reduced in size, and the operation sound when the air blowing means 16 is actuated can be reduced. it can.
[0040]
Further, since the disassembly unit 19 is electrically connected in series, when a part of the porous heating element 23 is disconnected, the entire disassembly unit 19 is not energized, so that it is easy to detect the disconnection state and prevent abnormal operation of the apparatus. can do.
[0041]
Further, when the porous catalyst body 29 has a wave-like structure, the area functioning as a catalyst can be expanded, so that the contact efficiency with the generated gas can be improved, and the purification performance can be greatly improved. Furthermore, since the apparent dimensions can be significantly reduced, the device can be made smaller and thinner.
[0042]
In the second embodiment, two decomposition units 19 are used, but excellent purification performance can be obtained even with a configuration using three or more decomposition units 19.
[0043]
In the air purifying apparatus according to the first and second embodiments of the present invention, the trapping means 12 is a filter made of ceramic fiber or metal fiber that traps contaminant particles such as mold, bacteria, and house dust floating in the air. As explained in the configuration used, a honeycomb-like structure coated with an adsorbent that adsorbs pollutant gases such as odors in the air and volatile organic compounds such as aldehyde generated from building materials, walls, and furniture is used instead. The present invention can also be applied to a conventional air purifier or an air purifier configured to use both.
[0044]
【The invention's effect】
As described above, the air purifying apparatus according to claim 1 includes a blowing means for introducing air into the purification air passage, a capturing means provided in the purification air passage, a heating means, and a decomposition means, The disassembling means includes an outer frame made of two plate-like insulators having an opening in a substantially central portion, an intermediate frame made of at least one plate-like insulator having an opening in a substantially central portion, and the middle frame A porous electric heating element configured to have a folded structure at the end of the inner frame so as to be sandwiched, and to face the opening of the outer frame and the inner frame, and each layer of the porous electric heating element At least one spacer formed of a plate-like insulator having a constant width and disposed so that the width direction is substantially parallel to the air flow, and an inner frame provided on a side surface of the porous electric heating element, A porous catalyst carrying a catalyst disposed on at least one surface of the outer frame In the regeneration process, by constituting a decomposition unit consisting of a plate-like catalyst outer frame body having an opening at a substantially central portion disposed so as to sandwich the porous catalyst body with the outer frame body, The porous electric heating element constituting the decomposition unit has a heating area substantially equal to that of the porous catalyst body, and both are arranged close to each other, so that the porous catalyst body can be heated uniformly, and the porous catalyst body The entire temperature can be raised to an activation temperature that functions as a catalyst in a short time, and the porous electric heating element itself has a gas decomposing action, so that most of the generated gas can be decomposed, resulting in high purification performance. Can be realized. Further, since the temperature can be raised in a short time, the power consumption can be reduced and the reproduction time can be shortened.
[0045]
Further, by setting the porous electric heating element in a folded configuration, the heat generation area of the porous electric heating element can be expanded, so heat exchange with the passing air is improved, and the temperature of the porous catalyst body can be increased more quickly. can do. Further, when the odd number of turns is made, it is possible to take out the connection terminal and the lead wire from the same direction, minimizing the routing of the lead wire in the housing, and simplifying the device configuration.
[0046]
Furthermore, by constituting the frame of the disassembly unit with an insulator, the shape of the porous electric heating element can be maintained and the electrical insulation with other structural members can be maintained, and safety can be ensured. . Further, since the heat radiation from the porous electric heating element to the member forming the purification air passage is suppressed by the frame, the decomposition unit itself can be kept at a high temperature, and the heat insulating structure can be simplified.
[0047]
Further, the air purifying apparatus according to claim 2 is configured such that a plurality of the disassembly units of claim 1 are physically arranged in parallel and electrically connected in series, whereby capturing means per unit volume of the disassembly unit is obtained. Since the amount of gas generated from the gas can be reduced, the decomposition performance of the generated gas can be improved. In addition, since the air passage area can be increased, the pressure loss at the disassembling means is reduced, the blowing means can be reduced in size, and the operating sound when the blowing means is operated can be reduced.
[0048]
In addition, since the disassembly units are electrically connected in series, when a part of the porous heating element is disconnected, the entire disassembly unit is not energized, making it easy to detect disconnection and preventing abnormal operation of the device. be able to.
[0049]
In addition, the air purifying apparatus according to claim 3 has a structure in which the porous electric heating element itself supports the catalyst function by providing the porous electric heating element with the catalyst, so that the generated gas can be further decomposed. In addition to being able to improve, the decomposition temperature of the gas generated from the capture means can be lowered by the catalyst, so that the set temperature of the decomposition means can be lowered, power saving is achieved, and the device configuration and heat insulation structure are improved. Simplification can be achieved.
[0050]
According to a fourth aspect of the present invention, there is provided an air cleaning device having at least one of a porous electric heating element and a porous catalyst body having a wave-like structure, so that when the porous electric heating element has a wave-like structure, the heat generation area is expanded. Therefore, heat exchange with the passing air is improved, the temperature of the porous catalyst body can be increased more quickly, and the decomposition performance of the generated gas can be improved. In addition, since the wavy length and wavy interval can be set freely, the resistance value of the porous heating element can be set arbitrarily, and the degree of freedom in designing the heating element can be increased. On the other hand, when the porous catalyst body has a wave-like structure, the area that functions as a catalyst can be expanded, so that the contact efficiency with the generated gas can be improved, and the purification performance can be greatly improved.
[0051]
In addition, since the apparent dimensions can be greatly reduced, the size and thickness of the device can be reduced.
[0052]
In the air purifying apparatus according to claim 5, the heat conductivity can be improved by configuring the skeleton of the porous electric heating element and the porous catalyst body with a heat-resistant metal having a network structure. The temperature distribution between the heating element and the porous catalyst body can be made more uniform, and stable gas purification performance can be obtained, and the design as an electric heating element can be easily performed, resulting in high productivity. be able to.
[Brief description of the drawings]
FIG. 1 is a perspective view of an air cleaning device according to a first embodiment of the present invention.
FIG. 2 is a perspective view of essential parts of a disassembling means (decomposing unit) applied to the air cleaning device.
FIG. 3 is an enlarged schematic cross-sectional view of the same decomposition means (a porous heating element and a porous catalyst body constituting the decomposition unit 9).
FIG. 4 is a perspective view of a main part of disassembling means (decomposing unit) applied to the air cleaning device according to the second embodiment of the present invention.
FIG. 5 is a sectional view of a conventional air cleaning device.
[Explanation of symbols]
11 Purification air passage
12 Capture means
13 Heating means
15 Disassembling means
16 Air blowing means
19 Disassembly unit
20 Outer frame
21a, 21b, 30 opening
22 Medium frame
23 Porous electric heating element
24 Spacer
25 Inner frame
29 Porous catalyst body
31 Catalyst outer frame
35 Heat-resistant metal with network structure
37 Catalyst

Claims (5)

A housing having a purification air passage inside, a blowing means for introducing air into the purification air passage, and at least one of contamination particles and contamination gas contained in the air provided in the purification air passage Capture means for capturing; heating means for incinerating or desorbing contaminated particles captured by the capture means; and decomposition means for decomposing and purifying gas generated from the capture means disposed above the capture means The disassembling means includes an outer frame body made of two plate-like insulators having an opening at a substantially central portion, an intermediate frame body made of at least one plate-like insulator having an opening at a substantially central portion, A porous electric heating element having a folded structure at an end portion of the middle frame body so as to sandwich the frame body and set to face the outer frame body and the opening of the middle frame body, and the porous electric heating element From a plate-shaped insulator of a certain width between each layer At least one spacer disposed so that the width direction is substantially parallel to the air flow, an inner frame provided on a side surface of the porous electric heating element, and at least one surface of the outer frame And a plate-shaped catalyst outer frame body having an opening at a substantially central portion disposed so as to sandwich the porous catalyst body between the outer frame body and the porous catalyst body. An air purifier composed of a disassembly unit. A housing having a purification air passage inside, a blowing means for introducing air into the purification air passage, and at least one of contamination particles and contamination gas contained in the air provided in the purification air passage Capture means for capturing; heating means for incinerating or desorbing contaminated particles captured by the capture means; and decomposition means for decomposing and purifying gas generated from the capture means disposed above the capture means The disassembling means includes an outer frame body made of two plate-like insulators having an opening at a substantially central portion, and an intermediate frame body made of at least one plate-like insulator having an opening at a substantially central portion, A porous electric heating element configured to have a folded structure at an end of the inner frame body so as to sandwich the inner frame body, and to face the opening of the outer frame body and the inner frame body, and the electric heating element From a plate-shaped insulator of a certain width between each body layer At least one spacer disposed so that the width direction is substantially parallel to the air flow, an inner frame provided on a side surface of the electric heating element, and at least one surface of the outer frame A plurality of a catalyst body having a porous catalyst body, and a plate-shaped catalyst outer frame body having an opening at a substantially central portion disposed so as to sandwich the porous catalyst body with the outer frame body. An air purifier comprising a decomposition unit, wherein the plurality of decomposition units are physically arranged in parallel and electrically connected in series. The air cleaning device according to claim 1 or 2, wherein the porous electric heating element carries a catalyst. The air cleaning device according to any one of claims 1 to 3, wherein at least one of the porous electric heating element and the porous catalyst body has a wave-like structure. The air purifier according to any one of claims 1 to 4, wherein the skeleton of the porous electric heating element and the porous catalyst body is made of a heat-resistant metal having a network structure.

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