JP2008118039A - Moisture absorption respiratory apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce labor and its cost required for exchanging silica gels. <P>SOLUTION: The moisture absorption respiratory apparatus body comprises a first air inflow/outflow opening which communicates with the air inflow/outflow opening of an electric equipment that requires inflow/outflow of air, a second air inflow/outflow opening which acts as an air outflow opening when the first air inflow/outflow opening acts as an air inflow opening while acts as an air inflow opening if it acts as an air outflow opening, a moisture absorbent which is interposed in the air inflow/outflow path between the first air inflow/outflow opening and the second air inflow/outflow opening, for absorbing moisture of the air that passes the air inflow/outflow path, and a dry air inflow opening into which the air having a specified humidity or less flows for drying the moisture absorbent. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hygroscopic respirator.

  The hygroscopic respirator is attached to an electric device that has an air inflow / outlet port, and inflows / inflows of air, and absorbs air that flows in / out of the electric device. The hygroscopic respirator has a storage container filled with a hygroscopic agent (for example, silica gel) having a hygroscopic function, and two air outflow inlets that serve as an air inlet and an air outlet complementarily on one side and the other side of the storage container. have. And the air outflow inlet of one side is connected with the air outflow inlet of the said electric equipment. With the above configuration, the hygroscopic respirator absorbs air when the air flows into and out of the electric device. As an electrical device to which a hygroscopic respirator is attached, for example, in a substation, there is an oil-filled transformer that uses oil (insulating oil) as a medium for insulation and cooling of the transformer body.

  The insulating oil of the oil-filled transformer expands or contracts according to the heat generated in the transformer body and the outside air temperature. Therefore, the oil-filled transformer is provided with a conservator that absorbs the volume change due to the expansion / contraction of the insulating oil by the outflow / inflow of air. There are two types of conservators: an open type in which air and insulating oil are in contact with each other, and a shut-off type in which air and insulating oil are shut off using, for example, a rubber bag or film (hereinafter referred to as a rubber film). . In the case of an open type conservator, the insulating oil may be deteriorated by contact between the insulating oil and moisture in the air. Further, in the case of a shut-off type conservator, there is a risk of deterioration of the rubber film due to contact between the rubber film and moisture in the air.

  Therefore, the hygroscopic respirator absorbs air flowing into these conservators (see, for example, Patent Document 1).

  FIG. 12 is a diagram for explaining an example of the configuration of a conventional hygroscopic respirator. The hygroscopic respirator 110 shown in FIG. 12 mainly includes a pipe connection flange 112, a storage container 114, an air guide plate 120, an air guide cylinder 121, an oil container 122, an oil viewing window 126, a hygroscopic inlet 130, and a hygroscopic agent. It has a take-out port 132, a hygroscopic agent viewing window 134, and lids 131 and 133.

  The storage container 114 is, for example, a cylindrical container for storing the silica gel 116. The silica gel 116 is accommodated in the storage container 114 surrounded by the U surface, the B surface, and the side surfaces thereof.

  The silica gel 116 is composed of a plurality of particles and has a moisture absorption function for absorbing moisture. The silica gel 116 gradually changes from blue to light pink as it absorbs moisture (this process of change is referred to as degradation). Then, when the silica gel 116 absorbs about 30% of water with respect to the weight of the silica gel 116, the silica gel 116 becomes light pink and does not absorb moisture any more (this state is referred to as a lifetime). When the silica gel 116 reaches the end of its life, it needs to be replaced with a new one. Therefore, the storage container 114 is provided with a hygroscopic agent outlet 132 for taking out the silica gel 116 from the storage container 114 and a hygroscopic agent intake port 130 for taking the silica gel 116 into the storage container 114 as described later. Yes. In addition, when the silica gel 116 that has reached the end of its life is dehumidified by heating with, for example, a heater or the like, the moisture can be absorbed again (see, for example, Patent Document 2). This is called regeneration of the silica gel 116.

  The pipe connection flange 112 is provided on the surface U on the + z side of the storage container 114 and is connected to a pipe of an electric device (not shown). By this connection, the air inflow / outlet port 111 of the hygroscopic respirator 110 and the air outflow / inlet port of an electric device (not shown) are communicated.

  The hygroscopic agent intake 130 is for taking in the silica gel 116 into the storage container 114, and is provided on a part of the surface U of the storage container 114.

  The lid 131 closes the hygroscopic agent intake port 130 and allows the silica gel 116 to be taken in from the hygroscopic agent intake port 130 by being opened.

  A plurality of vent holes 117 are provided on the surface B on the −z side of the portion where the silica gel 116 is stored in the storage container 114 with a diameter smaller than the diameter of the silica gel 116. Note that the surface B is provided so as to be inclined so that the z direction becomes the − side (vertical direction side) as the x direction becomes the + side (toward the moisture absorbent outlet 132).

  The moisture absorbent outlet 132 is for taking out the silica gel 116 from the storage container 114.

  The lid 133 closes the hygroscopic agent outlet 132 and allows the silica gel 116 to be taken out from the hygroscopic agent outlet 132 by opening the lid 133. When the lid 133 is opened from the moisture absorbent outlet 132, the silica gel 116 moves toward the moisture absorbent outlet 132 by its own weight because the surface B is inclined. Therefore, the silica gel 116 can be taken out from the storage container 114.

  The hygroscopic sight glass 134 is formed of a transparent material (for example, glass) for visually confirming the deterioration state (color) of the silica gel 116, and is formed between the surface U and the surface B of the storage container 114. It is provided on a part of the side.

  The air guide plate 120 is a disk-shaped member disposed on the −z side with respect to the surface B of the storage container 114, and has an opening through which air flows in and out at the center.

  The air guide cylinder 121 is disposed in the −z direction along the opening of the air guide plate 120.

  The oil container 122 is a transparent (for example, glass) container that holds an isolation oil 124 for closing the silica gel 116 from the outside air, and is fixed to the air guide plate 120 by c in the figure. A vent hole 128 is formed at a location where the oil container 122 and the air guide plate 120 are not fixed. Further, the isolation oil 124 is filled in the oil container 122 to such a height that the lower end (−z side) of the air guide cylinder 121 is immersed.

  The oil viewing window 126 is for visually confirming the amount and state of the isolation oil 124 and is formed of a transparent material.

  Hereinafter, the case where the hygroscopic respirator 110 is attached to an oil-filled transformer will be described with reference to FIG. FIG. 13 is a diagram for explaining an example in which a hygroscopic respirator 110 is attached to an oil-filled transformer. FIG. 13A is a diagram showing a case of a shut-off type conservator, and FIG. 13B is a diagram showing a case of an open type conservator. In FIG. 13A and FIG. 13B, parts having the same configuration are denoted by the same reference numerals and description thereof is omitted. First, the case of the interruption type conservator shown in FIG.

  The transformer main body 100 is housed in a housing 102 and the housing 102 is filled with an insulating oil 101.

  The conservator 104 has an air inlet / outlet port 109, and the connecting pipe 103 is used to allow the air to flow in / out from the air inlet / outlet port 109 in response to the expansion or contraction of the insulating oil accompanying the operation of the transformer body 100 of the housing 102. It communicates with the housing 102 via The insulating oil 101 is filled until the height of the conservator 104 is approximately halfway (h in FIG. 13).

  The rubber film 105 is for blocking an insulating oil 101 layer (hereinafter referred to as an insulating oil layer) and an air layer (hereinafter referred to as an air layer). The rubber film 105 is flexible and oil-resistant. The rubber film 105 is fixed to the conservator 104 along the inner periphery of the conservator 104, and the unfixed portion can be raised and lowered according to the pressure of the air layer and the pressure of the insulating oil layer. Yes. In the case of FIG. 13A, the pressure of the air layer and the pressure of the insulating oil layer are balanced at the height of h.

  The air inflow / outflow port 109 communicates with the air outflow / inflow port 111 of the hygroscopic respirator 110 via the connecting pipe 108.

  Next, the air inflow / outflow operation will be described with reference to FIGS. When the insulating oil 101 of the oil-filled transformer 102 contracts, the height of the rubber film 105 is lowered from the position h. In accordance with the amount of change in h, air flows into the conservator 104 through the hygroscopic respirator 110 and the connecting pipe 108. The air flow path in the hygroscopic respirator 110 at this time is shown by solid arrows in FIG. That is, the air flowing in from the vent hole 128 flows into the storage container 114 through the isolation oil 124 in the oil container 122, the air guide tube 121, and the vent hole 117 in the surface B of the storage container 114, and is absorbed by the silica gel 116. Is done. The absorbed air flows out from the air outlet 111 of the surface U of the storage container 114 to the air outlet 109 of the conservator 104.

  On the other hand, when the insulating oil 101 of the oil-filled transformer 102 expands, the position h increases. Depending on the amount of change in h, a part of the air in the air layer is expelled from the conservator 104 and flows out through the connecting pipe 108 and the hygroscopic respirator 110. The air flow path in the hygroscopic respirator 110 at this time is indicated by broken-line arrows in FIG. The air that has flowed out of the conservator 104 flows into the air outflow inlet 111 of the hygroscopic respirator 110 through the connecting pipe 108, passes through the silica gel 116, and flows out from the vent hole 117. And it flows out outside via the air guide cylinder 121, the isolation oil 124, and the vent hole 128. That is, the air flows out through the flow path opposite to the case where the air flows in.

In the case of the open type conservator 106 shown in FIG. 13B, the air layer and the insulating oil layer are in direct contact within the conservator 106. The air inflow / outflow operation when the hygroscopic respirator 110 is provided is the same as that in the case of the conservator 104 in FIG. Therefore, the description is omitted.
Japanese Patent Laid-Open No. 10-165749 Japanese Patent Laid-Open No. 10-165750

  The air flowing into the vent hole 117 from the outside of the hygroscopic respirator 110 through the vent hole 128 may be air having a humidity higher than a predetermined value (hereinafter referred to as non-dried air). In the conventional hygroscopic respirator 110, moisture that has not been dried may be absorbed in this way, and since the silica gel 116 is not dehumidified, the period until the silica gel 116 reaches the end of its life is short (for example, 6 Months). As a result, there is a problem that labor and labor costs for replacing the silica gel 116 are required.

  Further, as the silica gel 116 deteriorates, air that has not been sufficiently absorbed is supplied to the conservator 104 or the conservator 106, and the insulating oil 101 and the rubber film 105 may be deteriorated. Further, taking out the silica gel 116 that has reached the end of life from the hygroscopic respirator 10 and regenerating it by heating it with a heater, for example, is troublesome and not economical.

  The present invention has been made in view of such problems, and the object of the present invention is to extend the life of the hygroscopic agent compared to the conventional one, and to reduce labor and labor costs required for replacing the hygroscopic agent. It is to provide a hygroscopic respirator.

  The invention for solving the above-described problems includes a first air outflow inlet that communicates with an air outflow inlet of an electrical device that requires air inflow and outflow, and the first air outflow inlet. When it becomes an air inlet, it becomes an air outlet, and when the first air outlet becomes an air outlet, a second air outlet, which becomes an air inlet, the first air outlet, and the first A moisture absorbent that absorbs moisture of the air that passes through the air outlet / inlet passage and has a humidity equal to or lower than a predetermined value for dehumidifying the moisture absorbent. And a dry air inlet through which air flows. By flowing in dry air from the dry air inlet, the moisture absorbed by the hygroscopic agent can be reduced as compared with the prior art. Therefore, the lifetime of the hygroscopic agent can be extended more than before, and labor and labor costs required for replacing the hygroscopic agent can be reduced.

  In the hygroscopic respirator, the air having a humidity equal to or lower than the predetermined value flows out from the second air outflow inlet when the first air outflow inlet serves as an air inflow port, and When the air outlet / inlet is an air outlet, the inlet / outlet pressure may flow out from the first air outlet / inlet. The flow path of the dry air in the hygroscopic respirator can be switched according to the inflow and outflow of air from the electrical equipment.

  Furthermore, in this hygroscopic respirator, it is preferable that air having a humidity equal to or lower than the predetermined value always flows into the dry air inlet. By always allowing dry air to flow in, it is possible to prevent undried air from flowing into the hygroscopic respirator from the outside.

  Furthermore, it is preferable that the hygroscopic respirator further includes a partition plate that partially partitions between the first air outflow inlet and the dry air inflow inlet toward the second air outflow inlet. By providing the partition plate, the flow path of the dry air in the hygroscopic respirator becomes long, so that the drier air can flow out to the electrical equipment. In addition, the hygroscopic agent can be further dried.

  In the hygroscopic respirator, a first mode in which air having a humidity equal to or lower than the predetermined value flows into the dry air inlet, and air having a humidity lower than the predetermined value does not flow into the dry air inlet. You may make it become any one mode in 2nd mode. It is economical because the hygroscopic agent can be regenerated by the hygroscopic respirator by switching the mode, and dry air does not flow in the second mode.

  In the hygroscopic respirator, a first mode in which air having a humidity below the predetermined value flows into the dry air inlet at a first flow rate, and air having a humidity below the predetermined value is a second mode. You may make it become any one mode in the 2nd mode which flows in into the said dry air inflow port by flow volume (<1st flow volume). Also in the second mode, since the second flow rate of dry air flows in, the deterioration of the hygroscopic agent can be delayed.

  Furthermore, in this hygroscopic respirator, it is preferable that one of the first mode and the second mode is set according to the humidity of the hygroscopic agent. For example, the mode can be automatically switched by detecting the humidity of the hygroscopic agent with a humidity sensor.

  Furthermore, in this hygroscopic respirator, when air flows in and out of the second air inflow / outlet port, the second air outflow port is opened by receiving the air outflow / inflow pressure, and the second air outflow port is opened. When the air does not flow into or out of the air inlet / outlet, the moisture-proof liquid that closes the second air-outlet inlet and the second air-outlet inlet and the outside are opened or closed via the moisture-proof liquid. Therefore, a holding container that holds the moisture-proof liquid, a dry air outlet that flows out air having a humidity equal to or lower than the predetermined value, and air in the second air outlet when in the first mode. And inflow of air to the dry air outlet, and in the second mode, inflow of air to the second air outlet and the dry air outlet are permitted. Off to prevent air from entering And vessels, is preferably further provided with a. In the first mode, since the dry air flows out without passing through the moisture-proof liquid, the flow rate of the dry air can be increased as compared with the second mode, and the moisture-proof agent can be effectively regenerated.

  In the hygroscopic respirator, the hygroscopic agent is preferably composed of a plurality of particles having a hygroscopic function. Compared with the case where the hygroscopic agent is a simple substance, the surface area is increased and the amount of moisture absorption can be increased. In addition, if a suction port is provided at the lower side of the side surface of the hygroscopic respiratory device, or if a suction port is provided on the lower surface of the hygroscopic breathing device, the hygroscopic agent will fall due to the weight of the hygroscopic agent due to the particles. Therefore, the hygroscopic agent can be easily taken out from the hygroscopic respirator.

  The hygroscopic respirator preferably further includes a hygroscopic inlet / outlet for taking in or taking out the hygroscopic agent and a lid for closing the hygroscopic inlet / outlet. Due to the deterioration of the hygroscopic function of the hygroscopic agent, the hygroscopic agent can be replaced with a new or regenerated one.

  Moreover, in this hygroscopic respirator, it is preferable that air having a humidity equal to or lower than the predetermined value is supplied from a compressor. For example, in a substation, dry air can flow from a compressor installed to supply compressed air to a device (such as a switch) that uses compressed air. Therefore, dry air can be obtained without adding an apparatus.

  Further, in the hygroscopic respirator, the electrical device includes a transformer body, a casing that houses the transformer body and insulating oil that covers the periphery of the transformer body, and the air outflow inlet. An air chamber that communicates with the housing to allow air to flow out from the air outflow inlet in response to expansion of the insulating oil accompanying the operation of the vessel body, and to flow in air to the air outflow inlet in response to contraction of the insulating oil And an oil-filled transformer provided with. In an oil-filled transformer that performs an air inflow / outflow operation according to the expansion or contraction of the insulating oil, for example, deterioration of the insulating oil can be effectively prevented.

  According to the present invention, it is possible to extend the life of the hygroscopic agent as compared with the conventional case, and it is possible to reduce labor and labor costs required for replacing the hygroscopic agent.

  At least the following matters will become apparent from the description of the present specification and the accompanying drawings.

=== First Embodiment ===
<Overall configuration>
FIG. 2 is a diagram showing an example of the entire configuration using the hygroscopic respirator 10 according to the first embodiment of the present invention. The hygroscopic respirator 10 is provided in an oil-filled transformer. In FIG. 2, the same reference numerals are given to the same components as those in FIG.

  As shown in FIG. 2, the overall configuration using the hygroscopic respirator 10 according to the first embodiment of the present invention mainly includes the hygroscopic respirator 10, the air compression device 200, the connecting pipes 103 and 108, and the conservator 104 ( An air chamber) and a housing 102.

  The housing 102 accommodates the transformer main body 100 and insulating oil that covers the periphery of the transformer main body 100.

  The conservator 104 has an air inlet / outlet port 109, and the connecting pipe 103 is used to allow the air to flow in / out from the air inlet / outlet port 109 in response to the expansion or contraction of the insulating oil accompanying the operation of the transformer body 100 of the housing 102. It communicates with the housing 102 via Further, the air outflow inlet 109 of the conservator 104 communicates with an air outflow inlet 111 of the moisture-absorbing respirator 10 to be described later via a connecting pipe 108.

  The hygroscopic respirator 10 contains silica gel 116 (hygroscopic agent) inside, and absorbs and flows out the inflowing air. In the hygroscopic respirator 10 of the present invention, air is constantly flowing from an air compression device 200 described later through a pipe 220 at an inflow pressure described later.

  The air compressor 200 generates high-pressure compressed air by compressing air. The air compressor 200 supplies air having a humidity of a predetermined value (for example, 19%) or less (hereinafter referred to as dry air) obtained based on this compression to the hygroscopic respirator 10 through the pipe 220. Note that the dry air is, for example, air having a humidity that does not substantially deteriorate the insulating oil 101 and the rubber film 105 and can dehumidify the silica gel 116.

<Configuration of air compressor>
The air compressor 200 is a device having a well-known configuration that generates compressed air used for air-operated equipment (for example, a switch and a circuit breaker) in a substation, for example. The air compressor 200 includes an air filter 202, an intake pipe 204, an air compressor 206 (compressor), a discharge pipe 208, a motor 210, an air tank 212, a drain valve 214, a flow rate adjustment valve 216, and a pipe 220.

  The air filter 202 removes dust in the air and supplies it to the intake pipe 204.

  The motor 210 is a power source that drives the air compressor 200.

  The air compressor 206 is driven by a motor 210, compresses the air taken in through the air filter 202 and the intake pipe 204, creates high-pressure compressed air, and discharges it to the discharge pipe 208. As a compression method of the air compressor 206, there are a reciprocating type (for example, a piston type) and a rotary type (for example, a screw type), but the hygroscopic respirator 10 of the present invention can be used in any method. can do.

  The air tank 212 temporarily stores the compressed air discharged from the discharge pipe 208. Note that when air is compressed, it becomes high temperature and contains a lot of moisture. When this compressed air is naturally cooled by the discharge pipe 208, the air tank 212, etc., the moisture that can no longer be contained becomes water droplets and air compression. An impurity called drain is generated by mixing with lubricating oil or metal powder generated from the machine 206 (this principle will be described later). Drain is collected at the bottom of the air tank 212.

  The drain valve 214 is a valve for discharging the drain accumulated at the bottom of the air tank 212 from the air tank 212.

  The flow rate adjustment valve 216 depressurizes the compressed air flowing out from the air tank 212 and adjusts the flow rate of the air flowing through the pipe 220.

Next, the operation of the air compressor 200 will be described.
When the air compressor 200 is driven by the motor 210, air is taken into the air compressor 206 through the air filter 202 and the intake pipe 204. This air is compressed by the air compressor 206 to become high-pressure compressed air.

  The compressed air discharged from the air compressor 206 is taken into the air tank 212 through the discharge pipe 208. In the air tank 212, drainage is generated by the condensation of the compressed air and is stored at the bottom of the air tank 212. This drain is discharged from the drain valve 214 to the outside of the air tank 212, for example, periodically.

  In addition, the compressed air in the air tank 212 is depressurized by the adjustment of the flow rate adjustment valve 216 and flows out to the pipe 220. The air that flows out to the pipe 220 is dry air.

FIG. 5 is a diagram for explaining the principle of generation of dry air. In FIG. 5, the horizontal axis represents temperature, and the vertical axis represents absolute humidity [amount of water vapor (kg) contained in 1 kg of air].
The solid line in FIG. 5 is a saturation line under atmospheric pressure, and the broken line is a saturation line under pressure. As described above, the maximum amount of water (saturated water vapor amount) that can be contained in the air decreases almost in inverse proportion to the pressure if the temperature of the air is the same.

  If air of the absolute humidity x1 and temperature t1 (state A) under atmospheric pressure is pressurized by the air compressor 206 and cooled to the same temperature t1 as before compression in the air tank 212, the pressure under pressure is reduced. It becomes the state B of the saturation line. That is, the moisture of x1-x2 is dehumidified. As described above, when the high-temperature compressed air is naturally cooled by the discharge pipe 208 or the air tank 212, moisture that cannot be contained is condensed and appears. In addition, t2 is a dew point (temperature when condensation occurs when cooled) after expanding from the state of B under pressure to air pressure.

  Therefore, the air flowing out from the air compressor 200 to the pipe 220 is, for example, dry air from which moisture of x1-x2 has been dehumidified.

<Configuration of hygroscopic respirator>
The configuration of the hygroscopic respirator 10 according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional view showing an example of a hygroscopic respirator 10 according to the first embodiment of the present invention. In FIG. 1 and FIG. 2, the same components as those in FIG.

  As shown in FIG. 2, the hygroscopic respirator 10 is connected to the connecting pipe 108 by a pipe connection flange 112. As a result, the air outflow inlet 109 of the conservator 104 and the air outflow inlet 111 of the hygroscopic respirator 10 communicate with each other. Then, the hygroscopic respirator 10 performs air inflow and outflow to the air inflow / outlet port 109 of the conservator 104 according to the expansion or contraction of the insulating oil 101 of the oil-filled transformer 102. The storage container 114 constitutes the main body of the hygroscopic respiratory apparatus 10 (hygroscopic respiratory apparatus main body).

  Further, the hygroscopic respirator 10 has a lid 12 and a hygroscopic agent intake port 13 (dry air inflow port) instead of the lid 131 and the hygroscopic agent intake port 130 of FIG. Further, the hygroscopic respirator 10 has a partition plate 14. In the present embodiment, the hygroscopic respirator 10 includes the partition plate 14, but may not include the partition plate 14.

  The lid 12 closes the moisture absorbent inlet 13 and allows the silica gel 116 to be taken into the storage container 114 from the moisture absorbent inlet 13 by opening the lid 12. In addition, the pipe | tube 220 of the air compressor 200 is penetrated by the lid | cover 12 of the moisture absorption respirator 10 of this invention.

  The hygroscopic agent intake 13 is an intake for taking in the silica gel 116 into the storage container 114, and also serves as an inlet for dry air from the air compressor 200 through the pipe 220. A dry air inlet may be provided separately from the moisture absorbent inlet 13. For example, you may make it provide the inflow port of dry air in the side surface of the storage container 114. FIG. In FIG. 1, a hygroscopic agent inlet 13 and a hygroscopic agent outlet 132 constitute a hygroscopic agent inlet / outlet.

  The partition plate 14 is provided from the surface U of the storage container 114 toward the vent hole 117 (second air outflow inlet). Further, a gap is formed between the partition plate 114 and the vent hole 117 to allow air to flow from the hygroscopic agent intake port 13 to the air outflow inlet 111 (first air outflow inlet). ing. The dry air that has flowed in from the moisture absorbent inlet 13 passes through this gap and flows out from the air outlet / inlet 111. 3A, 3B, and 3C are cross-sectional views for explaining an example of the partition plate 14 of the hygroscopic respirator 10 of the present invention. 3A, 3B, and 3C show cross sections in a direction (z direction) different from FIG. A plurality of openings 15 a are provided in the partition plate 14 ′ in FIG. Further, the partition plate 14 ″ of FIG. 3C is provided with a plurality of openings 16 connecting the adjacent ones in the y direction among the openings 15 of FIG. 3B.

  When the partition plate 14 is provided as shown in FIG. 3A, the dry air that has flowed in from the moisture absorbent intake port 13 passes through the gap between the partition plate 114 and the vent hole 117, and the air outflow port 111. Spill from. Therefore, the flow path of the dry air becomes longer, and more dry air can flow out from the air outflow inlet 111.

  In the case where the partition plate 14 ′ is provided as shown in FIG. 3B, the dry air that has flowed in from the moisture absorbent inlet 13 passes through the gap or opening 15 between the partition plate 114 and the vent hole 117. It flows out from the outflow inlet 111. Therefore, since the flow path of the dry air branches, the dry air can reach the air inflow / outlet port 111 earlier than in the case of FIG.

  When the partition plate 14 ″ is provided as shown in FIG. 3C, the dry air that has flowed in from the moisture absorbent intake port 13 passes through the gap or opening 16 between the partition plate 114 and the vent hole 117 and is air. It flows out from the outflow inlet 111. Since the opening 16 has a larger area than the opening 15, it is possible to increase the amount of dry air that reaches the air outflow inlet 111 earlier than in the case of FIG.

  In the hygroscopic respirator 10 of the present invention, even if the partition plate 14 is not provided, the dry air flowing in from the hygroscopic agent intake port 13 can be absorbed by the silica gel 116 and flowed out to the conservator 104. When the partition plate 14 is provided, the moisture absorption effect can be further increased.

<Air flow path in hygroscopic respirator>
The air flow path of the hygroscopic respirator 10 of the present invention will be described with reference to FIG. FIG. 4 is a view for explaining air flow paths in the hygroscopic respirator 10 of the present invention.

≪When air flows out to conservator≫
As shown in FIG. 4A, the dry air that has flowed out of the air tank 212 flows into the storage container 114 from the hygroscopic agent intake port 13 of the hygroscopic respirator 10 through the pipe 220. Then, the silica gel 116 absorbs moisture to form dry air having a lower humidity, and only the necessary amount in the conservator 104 flows out from the air inflow / outlet port 111. In addition, when the openings 15 and 16 are provided as shown in FIGS. 3B and 3C, the flow path of the dry air branches as shown by the thick lines (broken lines) in FIG. The dry air that has not flowed out to the conservator 104 flows out through the vent hole 117 and the vent hole 128.

  FIG. 4B is a diagram for explaining that air flows out from the vent hole 128. Inside the air guide cylinder 121, a pressure in the direction of the solid arrow is generated. Due to this pressure, the liquid level of the isolation oil 124 near the air guide cylinder 121 is lowered, and a gap is generated between the lower end of the air guide cylinder 121 and the liquid level of the isolation oil 124. Therefore, the space between the vent hole 117 and the vent hole 128 is opened, and air flows out from the vent hole 128. When air does not flow out from the vent hole 117, the vent hole 117 is blocked from the outside by the isolation oil 124.

≪When air flows in from conservator≫
As shown in FIG. 4C, the dry air that has flowed out of the air tank 212 flows into the storage container 114 from the hygroscopic agent inlet 13 through the pipe 220. The air that has flowed out of the conservator 104 flows into the storage container 114 through the connection pipe 108 and the air outflow inlet 111. In addition, when the openings 15 and 16 are provided as shown in FIGS. 3B and 3C, the flow path of the dry air branches as shown by the thick lines (broken lines) in FIG. Both of these are discharged to the outside through the silica gel 116, the vent hole 117, and the vent hole 128.

  Note that the dry air flowing from the air tank 212 through the pipe 220 is adjusted by the flow rate adjusting valve 216 to a predetermined inflow pressure. In addition, in the case of FIG. 4A, this inflow pressure allows air to flow out from the air outflow inlet 111, and does not allow external air to flow into the storage container 114 from the vent hole 128. In the case of (b), it is set so that bubbles are not generated in the isolation oil 124 by the pressure of the air flowing out from the vent hole 117.

  Thus, in the hygroscopic respirator 10 of the present invention, the dry air is constantly flowing from the air tank 212, so the silica gel 116 is dehumidified with the dry air. Therefore, the lifetime of the silica gel 116 can be made longer than before, and labor and labor costs required for replacing the silica gel 116 can be reduced.

  Further, even when the air compressor 200 is stopped due to a device trouble, for example, even when dry air is no longer flowed in, the external air that has flowed in from the vent hole 128 is passed through the vent hole 117 and the silica gel 116 as in the conventional case. Then, the air can be dehumidified by passing through the air outflow inlet 111 and can flow out to the conservator 104.

  Furthermore, even if the silica gel 116 is deteriorated to a state where it cannot absorb moisture sufficiently, the dry air can flow out to the conservator 104.

<Regeneration of silica gel>
The silica gel 116 that has reached the end of its life can be regenerated using the dry air that flows out of the air compressor 200.

  Hereinafter, the regeneration of the silica gel 116 will be described with reference to FIGS. 6 is a diagram illustrating an example of a container used for regeneration of the silica gel 116, FIG. 7 is a diagram illustrating removal of the silica gel 116 from the hygroscopic respirator 10, and FIG. 8 is a regeneration method of the silica gel 116. It is a figure for demonstrating an example.

  A container 400 shown in FIG. 6 is obtained by joining, for example, two PET bottles with the bottoms cut back to back and joined with, for example, a tape 404. The lid 406 closes one end of the container 400 and opens it to allow the silica gel 116 to be taken in or taken out from one end of the container 400. The lid 406 closes the other end of the container 400 and opens it. By doing so, the silica gel 116 can be taken in or taken out from the other end of the container 400.

  The container 410 is provided with a plurality of vent holes 414 smaller than the diameter of a single particle of the silica gel 116, for example, at the bottom of a plastic bottle. The lid 412 closes one end of the container 410 and allows the silica gel 116 to be taken in or taken out from one end of the container 410 by opening.

  Life-long silica gel 116 is taken from the hygroscopic respirator 10 into the containers 400 and 410 having the above configuration. As shown in FIG. 7, when the lid 133 of the moisture absorbent outlet 132 is removed, the silica gel 116 falls due to its own weight, and is thus released from the moisture absorbent outlet 132 to the outside. The silica gel 116 is taken into the container 400 and the container 410 and connected to the pipes 220 and 420 as shown in FIG. 8 so that the air from the air compressor 200 flows into the containers 400 and 410. A pipe 220 is penetrated through the lid 426, and a pipe 420 is penetrated through the lids 428 and 432, respectively.

  Then, by adjusting the flow rate adjustment valve 216 of the air compressor 200, dry air at a flow rate (for example, 40 liters / minute) for dehumidifying the silica gel 116 is caused to flow out. The dry air of this flow rate passes through the silica gel 116 in the containers 400 and 410 and flows out from the vent hole 414, and the silica gel 116 in the containers 400 and 410 is dehumidified and regenerated. In addition, since the container 400 is sealed by replacing the lids 426 and 428 of the container 400 with the lids 406 and 408, respectively, the container 400 can be used for storing the silica gel 116.

  When the regenerated silica gel 116 or new silica gel 116 is taken into the hygroscopic respirator 10, the lid 12 of the hygroscopic agent intake 13 is removed and the hygroscopic intake 13 is taken in. .

=== Second Embodiment ===
The configuration of the hygroscopic respirator according to the second embodiment of the present invention will be described with reference to FIGS. FIG. 9 is a cross-sectional view for explaining the configuration of the hygroscopic respirator 20 according to the second embodiment of the present invention. FIG. 10 is a perspective view for explaining a part of the internal configuration of the hygroscopic respirator 20. FIG. 11 is a diagram for explaining mode switching in the hygroscopic respirator 20. In FIG. 9, the same components as those in FIG.

  The hygroscopic respirator 20 includes an air guide plate 22, a rotating plate 24 (switching device), a rotating plate driving device 26, an air guide tube 28, an oil container 30 (holding container), and a humidity sensor 40. Further, a humidity detection device 42, a control device 44, and a flow rate adjustment valve control device 46 are provided outside the hygroscopic respirator 20.

The humidity sensor 40 measures the humidity of the silica gel 116 in the storage container 114.
The humidity detection device 42 detects whether or not the humidity of the silica gel 116 measured by the humidity sensor 40 is below a predetermined value indicating that the lifetime of the silica gel 116 is before the lifetime of the silica gel 116, and the detection result is controlled by the control device. 44.

  The control device 44 includes a regeneration mode (first mode) in which dry air having a first flow rate flows into the hygroscopic inlet 13 and a dry air having a second flow rate (<first flow rate). A control signal for switching between the normal mode (second mode) flowing into the inlet 13 and the normal mode (second mode) is output to the flow rate adjusting valve control device 46 and the rotating plate drive device 26. As will be described later, dry air may not be allowed to flow in the normal mode. The control signal is, for example, a low level (hereinafter referred to as “L”) when the humidity of the silica gel 116 is lower than a predetermined value, and the humidity of the silica gel 116 reaches a predetermined value. In the case of the output of the humidity detection device 42 indicating that it has been performed, for example, it becomes a high level (hereinafter referred to as “H”).

  As shown in FIG. 10, the air guide plate 22 is, for example, a disk-shaped plate centered on c <b> 1, and is fixed to the −z side from the surface B of the storage container 114. Further, the air guide plate 22 is provided with an opening 22a (second air outflow inlet) and an opening 22b (dry air outflow outlet) on a concentric circle centered on c1, for example.

  The rotating plate 24 is, for example, a disk-shaped plate that is provided in contact with the + z side of the air guide plate 22 and has an axis c2 on the c1 of the air guide plate 22 as a center. , And can be rotated around the axis c2. In addition, the rotation plate 24 is provided with openings 24a at positions that overlap with the openings 22a and 22b of the air guide plate 22 by rotation.

The rotating plate driving device 26 has, for example, a stepping motor (not shown) for rotating the rotating plate 24 to a predetermined position, and according to a control signal output from the control device 44, The rotating plate 24 is rotated. For example, when the control signal is “L”, the opening 24a of the rotation plate 24 is rotated to a position overlapping the opening 22a of the air guide plate 22, and when the control signal is “H”, the opening of the rotation plate 24 is rotated. 24 a is rotated to a position overlapping with the opening 22 b of the air guide plate 22.
The air guide tube 28 is provided on the −z side along the opening 22 a of the air guide plate 22.

  The oil container 30 is a container that contains the isolation oil 124 (moisture-proof liquid), and is fixed on the −z side of the opening 22 a of the air guide plate 22. The oil container 30 is filled with the isolation oil 124 to such an extent that the lower end of the air guide tube 28 is immersed.

  The flow rate adjustment valve control device 46 controls the open / close state of the flow rate adjustment valve 216 in accordance with the control signal output from the control device 44. For example, when the control signal is “H”, the flow rate adjusting valve control device 46 sets the flow rate adjusting valve 216 to the first flow rate (for example, 40 liters / minute) when the control signal is “H”. When the control signal is “L”, the flow rate adjustment valve 216 is adjusted so that the second flow rate is lower than the first flow rate (for example, 0.1 liter / min). In this way, the deterioration of the silica gel 116 can be delayed by flowing the dry air of the second flow rate during the period when the control signal is “L”.

  When the control signal is “L”, the flow rate adjustment valve 216 may be adjusted so that dry air does not flow in. In this case, the air flows in and out through the same flow path as in the prior art. Therefore, since dry air does not flow in when the control signal is “L”, moisture absorption can be performed economically.

  Hereinafter, the operation of the hygroscopic respirator 20 will be described.

≪Normal mode≫
When the humidity of the silica gel 116 is less than a predetermined value, the control device 44 outputs an “L” control signal based on the detection result of the humidity detection device 42. The flow rate adjusting valve control device 46 adjusts the flow rate adjusting valve 216 so that the flow rate of the dry air flowing through the pipe 220 is 0.1 liter / min by the control signal “L”. Further, as shown in FIG. 11A, the rotating plate driving device 26 is rotated to a position where the opening 24a of the rotating plate 24 and the opening 22a of the air guide plate 22 overlap with each other, as shown in FIG. The plate 24 is rotated.

  In this normal mode, of the dry air that flows into the storage container 114 from the pipe 220, the portion that does not flow out from the air outlet / inlet port 111 is the air hole 117, the opening 24 a of the rotating plate 24, and the opening of the air guide plate 22. 22a, the air guide tube 28, the isolation oil 124, and the vent hole 128 are discharged to the outside.

≪In playback mode≫
When the humidity of the silica gel 116 reaches a predetermined value, the control device 44 switches from “L” to “H” based on the detection result of the humidity detection device 42. The flow rate adjusting valve control device 46 adjusts the flow rate adjusting valve 216 so that the flow rate of the dry air flowing through the pipe 220 is 40 liters / minute by the control signal “H”. Further, when the rotating plate driving device 26 receives the control signal of “H”, as shown in FIG. 11B, the opening 24a of the rotating plate 24 and the air guide plate 22 from the state of FIG. The rotating plate 24 is rotated in the direction a to the position where the opening 22b overlaps.

  In the regeneration mode, the portion of the dry air that has flowed into the storage container 114 from the pipe 220 that has not flowed out of the air outflow inlet 111 flows out through the opening 24a of the rotating plate 24 and the opening 22b of the air guide plate 22. Will be. Therefore, since dry air does not flow into the oil container 30, the flow rate of the dry air flowing from the pipe 220 can be made larger than the flow rate in the normal mode, and the silica gel 116 can be dehumidified effectively. .

  The control device 44 includes a timer (not shown) that measures a preset time after the control signal changes from “L” to “H”, for example. The preset time is the time required to regenerate the silica gel 116 with dry air at a flow rate of 40 liters / minute, for example. When the preset time is measured by the timer after the control signal changes from “L” to “H”, the control device 44 switches the control signal from “H” to “L”.

  In response to the control signal “L”, the rotating plate driving device 26 rotates the rotating plate 24 in the direction b from the position shown in FIG. 11B to the position shown in FIG. The flow rate adjustment valve 216 is adjusted so that the dry air flowing through the pipe 220 is 0.1 liter / min. In this way, switching from the playback mode to the normal mode is performed.

As described above, in the hygroscopic respirator 20 of the present invention, the silica gel 116 can be regenerated without removing the silica gel 116 from the storage container 114 by switching between the normal mode and the regeneration mode. In the present embodiment, the normal mode and the regeneration mode are automatically switched according to the humidity of the silica gel 116. However, the rotation plate 24 may be rotated manually. Then, for example, the state (color) of the silica gel 116 is visually confirmed from the sight-seeing window 134 for the hygroscopic agent, and the flow rate adjusting valve 216 and the rotating plate 24 are manually operated to switch between the normal mode and the regeneration mode. Good.
Further, when the partition plate 14 of FIG. 1 is applied to the hygroscopic respirator 20, the moisture absorption effect can be further increased.

  As described above, in the hygroscopic respirator of the present invention, dry air always flows into the storage container 114, so that the life of the silica gel 116 can be extended, and labor and labor required for replacing the silica gel 116 are reduced. can do. In the present embodiment, silica gel 116 is used as the hygroscopic agent, but activated carbon, diatomaceous earth, or the like may be used as the particles.

  The above-described embodiment is intended to facilitate understanding of the present invention, and is not intended to limit the present invention. The present invention is changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

It is sectional drawing which shows an example of the hygroscopic respiratory apparatus which concerns on 1st Embodiment of this invention. It is a figure showing an example of the whole composition using a hygroscopic respirator concerning a 1st embodiment of the present invention. It is sectional drawing for demonstrating the partition plate of the moisture absorption respirator of this invention. It is a figure for demonstrating the flow path of the air in the hygroscopic respirator of this invention. It is a figure for demonstrating the principle of generation | occurrence | production of dry air. It is a figure which shows an example of the container used for the reproduction | regeneration of a silica gel. It is a figure explaining taking out of a silica gel from a hygroscopic respirator. It is a figure for demonstrating the regeneration method of a silica gel. It is sectional drawing for demonstrating the structure of the hygroscopic respiratory apparatus which concerns on 2nd Embodiment of this invention. It is a perspective view for demonstrating the internal structure of the hygroscopic respiratory apparatus which concerns on 2nd Embodiment of this invention. It is a figure for demonstrating mode switching in the hygroscopic respiratory apparatus which concerns on 2nd Embodiment of this invention. It is a figure for demonstrating an example of the structure of the conventional moisture absorption respirator. It is a figure for demonstrating an example which attached the hygroscopic respirator to the oil-filled transformer.

Explanation of symbols

10, 20, 110 Hygroscopic respirator 12, 131, 133, 406, 408, 412, 426, 428, 432 Lid 13, 130 Hygroscopic intake 14 Partition plate 15, 16, 22a, 22b, 24a Opening 22, 120 Air guide plate 24 Rotating plate 26 Rotating plate drive device 28, 121 Air guide tube 30, 122 Oil container 40 Humidity sensor 42 Humidity detection device 44 Control device 100 Transformer body 101 Insulating oil 102 Housing 103, 108 Connecting tube 104 106 Conservator 105 Rubber film 109, 111 Air outflow inlet 112 Pipe connection flange 114 Storage container 116 Silica gel 117, 414 Vent hole 124 Isolation oil 126 Oil sight window 128 Ventilation hole 132 Hygroscopic agent outlet 134 Hygroscopic sight window 200 Air compressor 202 Air filter 204 Intake pipe 206 Air Compressor 208 discharge pipe 210 motor 212 air tank 214 drain valve 216 flow control valve 220, 420 piping 400, 410 container 404 Tape

Claims (12)

For the hygroscopic respiratory body,
A first air outflow inlet communicating with an air outflow inlet of an electrical device that requires air inflow and outflow;
When the first air outflow inlet is an air inflow port, it is an air outflow port; when the first air outflow inlet is an air outflow port, a second air outflow inlet is provided;
A hygroscopic agent that intervenes in an air outflow / inflow path between the first air outflow inlet and the second air outflow inlet and absorbs moisture passing through the air outflow / inlet path;
A dry air inlet into which air having a humidity below a predetermined value for dehumidifying the moisture absorbent flows;
A hygroscopic respirator characterized by comprising:   The air having a humidity equal to or lower than the predetermined value flows out from the second air outflow inlet when the first air outflow inlet is an air inflow inlet, and the first air outflow inlet is the air outflow outlet. 2. The hygroscopic respirator according to claim 1, further comprising an inflow pressure that flows out from the first air outflow inlet.   The hygroscopic respirator according to claim 2, wherein the air having a humidity equal to or lower than the predetermined value always flows into the dry air inlet.   The moisture absorption according to claim 2, further comprising a partition plate that partially partitions the first air outflow inlet and the dry air inflow inlet toward the second air outflow inlet. Respiratory organ.   Either of the first mode in which the air having a humidity below the predetermined value flows into the dry air inlet, and the second mode in which the air having a humidity below the predetermined value does not flow into the dry air inlet The hygroscopic respirator according to claim 1, wherein one of the modes is selected.   A first mode in which air having a humidity below the predetermined value flows into the dry air inlet at a first flow rate; and air having a humidity below the predetermined value is a second flow rate (<first flow rate). 2. The hygroscopic respirator according to claim 1, wherein the mode is any one of a second mode flowing into the dry air inlet.   The hygroscopic respirator according to claim 5 or 6, wherein one of the first mode and the second mode is set according to the humidity of the hygroscopic agent. When air flows into and out of the second air outflow inlet, the second air outflow inlet is opened by receiving the air outflow / inflow pressure, and air is supplied to the second air outflow inlet. Does not flow in and out, the moisture-proof liquid closing the second air outflow port;
A holding container for holding the moisture-proof liquid so as to open or close between the second air outflow inlet and the outside via the moisture-proof liquid;
A dry air outlet through which air having a humidity equal to or lower than the predetermined value flows out;
In the first mode, the inflow of air into the second air outflow inlet is prohibited and the inflow of air into the dry air outlet is permitted, and in the second mode, the first A switch that permits the inflow of air into the air outflow inlet of 2 and prohibits the inflow of air into the dry air outlet;
The hygroscopic respirator according to any one of claims 5 to 7, further comprising:   The hygroscopic respirator according to any one of claims 1 to 8, wherein the hygroscopic agent comprises a plurality of particles having a hygroscopic function. A moisture absorbent inlet / outlet for taking in or taking out the moisture absorbent;
A lid for closing the moisture absorbent outlet;
The hygroscopic respirator according to claim 9, further comprising:   The hygroscopic respirator according to any one of claims 1 to 10, wherein the air having a humidity equal to or lower than the predetermined value is supplied from a compressor. The electrical equipment is
A transformer main body, a casing containing insulating oil covering the transformer main body and the periphery of the transformer main body, the air outflow inlet, and in response to expansion of the insulating oil accompanying the operation of the transformer main body And an air chamber that communicates with the housing to allow air to flow out from the air outflow inlet and to allow air to flow into the air outflow inlet in response to contraction of the insulating oil. The hygroscopic respirator according to any one of claims 1 to 11, wherein

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