JP2012154602A - Fluid heater and steam cleaning apparatus using the fluid heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid heater that has a simple structure and can be fabricated at a low cost.SOLUTION: The fluid heater is structured to have a fluid passage with an inlet and an outlet of a fluid, a heating source, a heater case holding the fluid passage and the heating source therein, and a heat conduction piece that is packed in the heater case and transfers the heat from the heating source to the fluid passage, wherein the heat conduction piece is packed so as to cover the heating source and the fluid passage.

Description

  The present invention relates to a fluid heating device for rapidly raising the temperature of a liquid such as water, and a steam cleaning device for cleaning an article using high-temperature and high-pressure steam obtained by using the fluid heating device.

  As a method of rapidly raising the temperature of the liquid, there are a method using a high frequency induction heating method, a method using a heater heating method, a method using an arc plasma, and the like. In a heating device using a high-frequency induction heating method, for example, as shown in Patent Document 1, a coil is formed around a liquid flow path, and a liquid in the flow path is directly heated by applying a high frequency to the coil. Yes. In consideration of the heat transfer efficiency, the metallic pipe serving as the flow path has a so-called spiral shape.

  In the heater heating method, for example, as disclosed in Patent Document 2, a heater is disposed around the liquid flow path, and the liquid in the flow path is heated by heat conduction. Therefore, it is desirable to fill the space between the heater and the flow path with a material having high thermal conductivity. In addition, from the viewpoint of heating the liquid in the flow path by heat conduction, this also includes a method for realizing rapid heating of the liquid using the generated heat of arc plasma obtained by direct current discharge.

JP 05-290960 A Japanese Patent Laid-Open No. 2002-090077

  In the apparatus disclosed in Patent Document 1, the apparatus main body does not reach a high temperature and is easy to handle. However, a process such as welding or brazing is required from the viewpoints of using a high-frequency power source and maintaining the electrical conductivity of the flow path, and a large cost is required for constructing the apparatus. Further, in the apparatus disclosed in Patent Document 2 and the like, it is necessary to fill the space between the heater and the flow path by, for example, casting or the like, and the manufacturing process becomes complicated. In addition, it is necessary to consider the thermal expansion of each component in design, and there is a problem that the manufacturing difficulty is high. For this reason, even if the apparatus has a system for heating the liquid in the flow path by heat conduction, a large cost is required to construct an actual apparatus.

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a fluid heating apparatus capable of rapidly heating a fluid, which has a structure that is low in manufacturing cost and easy to manufacture. To do. Further, the present invention further provides a high-pressure steam cleaning device that can easily provide high-pressure steam by using the fluid heating device, and that can clean various objects to be cleaned only by spraying high-pressure steam. It is also intended to provide.

  In order to solve the above problems, a fluid heating apparatus according to the present invention is a fluid heating apparatus that has a fluid passage having a fluid inlet and an outlet and heats a fluid that passes through the fluid passage. A heater case that includes a source, a fluid passage and a heating source therein, and a heat conduction piece that is filled in the heater case and transmits heat generated by the heating source to the fluid passage. The heater case is filled so as to cover the heating source and the fluid passage.

  In the above-described fluid heating device, it is preferable that the heat conduction pieces are filled at a predetermined filling density so as to form a void inside the heater case. Further, the heat conduction piece may include two or more types having different sizes and shapes at a predetermined ratio. In addition, the fluid heating device further includes temperature measuring means that is disposed inside the heater case and measures the internal temperature of the heater case, and a heat insulating material that covers the heater case and keeps the heater case warm, The passage is preferably obtained by molding a tubular member into a spiral shape.

  In order to solve the above-mentioned problem, a high-pressure steam cleaning apparatus according to the present invention is a high-pressure steam cleaning apparatus that performs cleaning of an object to be cleaned by spraying high-pressure steam onto the object to be cleaned, A high-pressure steam generating unit that generates high-pressure steam using a high-temperature fluid obtained from the fluid heating device according to the present invention described above, and a high-pressure steam that is connected to the high-pressure steam generating unit is arbitrarily applied to an object to be cleaned. A nozzle that can be ejected from the position and direction of the nozzle, and a cleaning tank having a tank structure that has an opening that opens at a specific part and can accommodate an object to be cleaned. The blow-out portion can be located inside the cleaning tank, and is characterized in that it is located inside the cleaning tank and sprays high-pressure steam onto the object to be cleaned.

  According to the present invention, it is possible to provide a fluid heating apparatus that is easy to design or select components and that is easy to manufacture and low in manufacturing cost. Further, according to the present invention, by using a fluid heating device that is easy to manufacture and inexpensive, a high-pressure steam cleaning device using high-temperature and high-pressure steam can be provided at low cost.

It is a figure which shows typically the structure at the time of seeing this from upper direction about 1st embodiment of the fluid heating apparatus which concerns on this invention. It is a figure which shows typically the structure at the time of seeing the fluid heating apparatus shown to FIG. 1A from the arrow 1B direction shown to FIG. 1A. It is a figure which shows typically the structure inside the fluid heating apparatus shown to FIG. 1A. It is a figure which shows typically the case where several types of small pieces are used about 2nd embodiment of this invention. It is further embodiment of this invention, Comprising: It is a figure which shows schematic structure at the time of using a fluid heating apparatus for a high pressure steam cleaning apparatus.

  An embodiment of a fluid heating apparatus according to the present invention will be described below with reference to the drawings. FIG. 1A schematically shows a structure of a fluid heating apparatus according to an embodiment of the present invention when viewed from above, and FIG. 1B shows the fluid heating apparatus viewed from the direction of arrow 1B shown in FIG. 1A. The structure at the time is shown schematically. FIG. 2 is a diagram schematically showing the internal structure of the fluid heating apparatus shown in FIG. 1A.

  The fluid heating apparatus 100 according to the present embodiment includes a cartridge heater 3, a thermocouple 5, a fluid passage 7, a heater case 9, a heat conduction piece 11, a case receiver 13, an exterior 15, and a heat insulating material 17. The exterior 15 has, for example, a rectangular parallelepiped shape made of a thin plate, and has an internal space that can include other various configurations inside to define the outer shape of the fluid heating device 100. The heater case 9 has a cylindrical shape having a column or a hollow portion 9a. More specifically, in the present embodiment, the heater case 9 has a region that becomes a space corresponding to the hollow portion 9a at the center in a cross section perpendicular to the cylindrical extending axis, and will be described later. The inner space of the annular case inner portion 9b existing around the hollow portion has a thickness capable of including other members.

  The heater case 9 is supported at a predetermined position in the internal space of the exterior 15 via the case receiver 13. A heat insulating material 17 is disposed between the inner surface of the outer package 15 and the outer surface of the heater case 9 to prevent heat transfer from the heater case 9 to the outer package 15. The previous case receiver 13 is also composed of a member having heat insulation properties so as to prevent heat transfer between the heater case 9 and the exterior 15. With the above-described configuration, the heater case 9 and the temperature inside the heater case 9 and prevention of unnecessary heating of the exterior 15 are achieved.

  The cartridge heater 3, the thermocouple 5, the fluid passage 7, and the heat conduction piece 11 are arranged in the case inside 9 b described above in the heater case 9. The fluid passage 7 is composed of, for example, a member obtained by molding a metal tube so as to circulate in a spiral shape, and functions as an inlet 7a and an outlet 7b of a liquid or the like in which both ends of the metal tube are heated. The liquid or the like flows through the inside. The fluid passage 7 is wound around the hollow portion 9a of the heater case 9, and most or main part excluding the inflow port 7a and the outflow port 7b is contained in the case interior 9b. The cartridge heater 3 and the thermocouple 5 are placed in the case interior 9b so that they are not in contact with each other and further are not in contact with the fluid passage 7. It is desirable that four or more cartridge heaters 3 are equally arranged around the extending axis of the heater case 9 in order to uniformly heat the inside 9 b of the heater case 9.

  As the heat conduction piece 11, for example, a metal piece having a cylindrical shape with a diameter and length of 1 mm or less is used. The heat conducting pieces 11 are filled in a predetermined density or a predetermined state in a space formed between the cartridge heater 3, the thermocouple 5 and the fluid passage 7 in the case interior 9b. Here, the predetermined density defines a density at which at least a part of the heat conducting piece 11 can move when vibration is applied to the fluid heating device 100, for example. Further, the predetermined state is that at least the cartridge heater 3 and the fluid passage 7 in the case interior 9b are covered with the heat conduction piece 11 filled in the case interior 9b, and a surplus of a predetermined size is contained in the case interior 9b. Define the state that formed the space.

  The heat supplied by the cartridge heater 3 as a heating source is transmitted to the fluid passage 7 through the heat conduction piece 11. In addition, when the cartridge heater 3 transfers heat to the heat conduction piece 11 as a heat medium, the heat conduction piece 11 is thermally expanded. However, by maintaining the above-described predetermined density or predetermined state, this thermal expansion is absorbed by a gap or the like that enables movement of the heat conducting piece 11. In addition, you may think that the predetermined density mentioned above is a packing density which can absorb the amount of thermal expansion when the heat conductive piece 11 thermally expands. By using the heat conducting piece 11 as a heat medium while maintaining such a predetermined density, it is not necessary to perform a design that takes into account the thermal expansion of the filling member, which is problematic in Patent Document 2, etc. It is possible to achieve the simplification and the reduction of the manufacturing cost.

  In addition, about the heat conductive piece 11, although the case where the metal piece which consists of a column shape was used in the embodiment mentioned above, this invention is not limited to the said form or material. For example, copper or a copper-based alloy having good thermal conductivity, or an aluminum-based alloy having both thermal conductivity and corrosion resistance can be selected as appropriate. FIG. 3 shows another embodiment of the present invention relating to another shape of the heat conducting piece 11 and the heat conducting piece 11. In FIG. 3, the left side shows a heat conduction piece 11 made of a cylindrical metal piece used in the first embodiment and a heat conduction piece 11 ′ made of a spherical metal body, which is a modified example thereof. In 2nd embodiment, the aspect at the time of adding further the 2nd heat conductive small piece (columnar shape) 12 and (spherical shape) 12 'smaller than these heat conductive small pieces 11 and 11' is shown. . By adding such a second heat conducting piece, the packing density is improved and the contacts between the pieces are increased, and the heat conduction efficiency through these is improved.

  As described above, the size of the heat conduction piece used in the present invention is not limited as long as a plurality of pieces can be arranged in the space between the cartridge heater 9 and the fluid passage 7, and the shape is limited to a cylindrical shape or a spherical shape. However, various shapes are possible. Further, in the path for transferring heat from the cartridge heater 9 to the fluid passage 7, the size may be such that a state in which the plurality of heat conductive pieces 11 are interposed in the shortest path is obtained. For example, a spherical shape is preferable from the viewpoint of heat conduction and uniformity of packing density, but a cylindrical shape is preferable in consideration of the manufacturing cost of the heat conductive pieces. In addition, the size does not need to be the same, and a plurality of types of pieces having a size equal to or smaller than the above-described size can be used at the same time and in any ratio in consideration of heat conduction efficiency and the like. Is also possible. However, in this case, it is preferable to reduce the total volume of the small sized pieces relative to the total volume of the large sized small pieces from the viewpoint of being able to absorb thermal expansion. When these heat conductive pieces undergo thermal expansion, by filling the case interior 9b of the heater case 9 with a space that can absorb the expansion amount, the object of the present invention can be achieved.

  In the above-described first embodiment, the cartridge heater 3 is used as a heating source because it is easy to handle, can be easily loaded into the case 9b, and the heat conduction piece 11 can be heated substantially evenly. Is going to be used. However, it is also possible to use other known heat sources as long as the heat conduction pieces 11 existing in the case inside 9b can be heated evenly. Moreover, although the form which consists of the metal pipe which made the fluid channel | path 7 helical from the viewpoint of the increase in the heating area | region of a liquid and compacting of a structure is illustrated, the viscosity of a fluid, heat capacity, and also the heat conduction small piece 11 of FIG. You may comprise from another form or material in consideration of a shape, filling amount, etc. Furthermore, although the thermocouple 5 is used for measuring the temperature inside the case 9b, the thermocouple 5 can be replaced with various known temperature measuring means according to the heating temperature of the fluid used.

  In the present invention, the case inside 9b of the heater case 9 is filled with air (atmosphere). However, this is filled with a heat medium such as a gas or a liquid having a predetermined characteristic, or such heat. It is good also as flowing in and out (purging) so that a medium may become a predetermined density or more. For example, an inert gas such as nitrogen can be supplied to the heater case 9, and the air gap present in the case inside 9 b is purged with the nitrogen, thereby suppressing the oxygen concentration to the heat conduction piece 11. It is possible to suppress surface oxidation that may occur. For example, when surface oxidation occurs in the heat conduction piece 11, the heat conduction efficiency may change depending on the oxide film. By introducing nitrogen or the like, surface oxidation is suppressed, and it is possible to suppress the temporal change in heat conduction efficiency that may be caused by this. In addition, although the liquid which is more excellent in heat transfer efficiency than gas can be used for filling the gap, it is more preferable to use a gas capable of absorbing the expansion amount of the heat conductive piece 11.

  In addition, the inflow port 7a and the outflow port 7b associated with the fluid passage 7 are arranged on both end surfaces of the cylindrical heater case 9 in consideration of the ease of device configuration. However, the aspect of the present invention is not limited to this. For example, these may be arranged not on the cylindrical end face but on the outer peripheral surface so that the liquid can be heated up to just before the inflow port 7a and the outflow port 7b. good. Further, for example, the arrangement of the fluid heating apparatus 100 may be appropriately changed according to the configuration of a high-pressure steam cleaning apparatus described later. The heater case 9 has the above-mentioned shape from the viewpoint of appropriate length of the fluid passage 7 and appropriate usage of the cartridge heater 3 and the heat conduction piece 11. However, the form of the heater case 9 can be variously changed according to the form of the fluid passage 7.

  Next, with reference to FIG. 4, a high-pressure steam cleaning apparatus using the above-described fluid heating apparatus as a steam generation unit will be described as a further embodiment of the present invention. The high-pressure steam cleaning apparatus 200 includes, as main components, a cleaning tank 61, a nozzle 21, a work tray 31 on which a work 30 to be cleaned is placed, a control plate 62, an exhaust opening cover 64, a high-pressure steam generating unit 29, And an air curtain generation unit including an air supply unit 45 and an air intake unit 47. The cleaning tank 61 has a tank structure having a cleaning space 63 of a predetermined size having an opening on the inside. More specifically, in the present embodiment, the cleaning space 63 has a rectangular parallelepiped shape. Below the cleaning space 63, there is a trap 65 for collecting so-called sewage that contributes to cleaning and cleaning water in which steam that has not contributed to cleaning is liquefied. In addition, although the structure which uses an air curtain production | generation unit is illustrated in this embodiment, it is good also as what omitted these structures.

  In addition, the steam described below includes “water vapor” that is configured in a gaseous state, “mixed fluid” in which gas and liquid are mixed, and “high temperature spray” that includes high-temperature fine water droplets. . Even in the actual cleaning operation, it is desirable to appropriately select these according to the situation such as the object to be removed, the object to be cleaned, the surface condition of the object to be cleaned, etc. Depending on the condition setting on the high-pressure steam generating unit side, the contents of the steam change variously. Therefore, in the present invention, the gas supplied from the nozzle 21 is simply referred to as steam as a name including the above concept. The fluid heating device according to the present invention is used to form this high-temperature steam or fine water droplets. The fluid in the present invention includes not only a simple liquid such as the above-mentioned mixture of a gas such as air and pure water, but also a liquid, a gas, and a mixture thereof. As described above, in the present invention, the nozzle 21 functions as a nozzle that supplies high-pressure steam and that can spray or jet the object to be cleaned from an arbitrary position and direction as described later.

  Further, an opening 67 through which the nozzle 21 can enter and retreat into the cleaning space 63 is formed in the upper part of the cleaning tank 61. In the present embodiment, the opening 67 is disposed on the upper surface of the rectangular parallelepiped space, but the shape of the cleaning space 63 and the cleaning tank 61 that defines the opening is not particularly defined, and the opening 67 is a specific part of the cleaning tank 61. It is preferable to be defined as an opening. The opening 67 is also used as a path when the work tray 31 or the work 30 where the work 30 as the object to be cleaned is fixedly held is carried into or out of the cleaning space 63.

  The trap 65 has an exhaust opening 69 that opens to a position rising a predetermined height from the surface that becomes the bottom surface of the trap 65. The exhaust opening 69 is connected to a blower exhaust system using a so-called blower (not shown), and the space inside the cleaning space 63 can be exhausted to the external space by the blower. Further, the trap 65 has a drain port 66 for discharging sewage or the like accumulated in the trap 65 to the outside. The drain port 66 is disposed vertically below the exhaust opening 69, and appropriately discharges sewage or the like from the drain port 66, thereby preventing the liquid level of sewage from exceeding the exhaust opening 69. The arrangement of the trap 65 is preferably grasped as the side opposite to the side where the nozzle 21 is arranged with respect to the arrangement of the work 30 from the relationship between the nozzle 21 and the work 30 which is the object to be cleaned.

  The control plate 62 is constituted by, for example, a net-like plate, a so-called mesh plate, and is arranged between the work tray 31 and the exhaust opening 69 and the trap 65 to separate the cleaning space 63 into an upper part and a lower part in the vertical direction. Note that the upper and lower portions in this case do not mean strictly upper and lower arrangements, and for the sake of convenience, the action of collecting the vapor etc. that has been discharged from the space where the work tray 31 is arranged and the cleaning space 63 is collected. Corresponds to the required space. Further, the control plate 62 is disposed on the side opposite to the side where the nozzle 21 is disposed with respect to the arrangement of the work 30 or the work tray 31, and is a member that can transmit the vapor ejected from the nozzle 21 and the liquid resulting from the vapor. Preferably defined.

  In the present embodiment, the nozzle 21 has a hollow shape having a steam outlet or a portion at one end, and ejects the steam in a direction that coincides with the extending axial direction. The nozzle 21 is also supported at the other end by a nozzle drive mechanism (not shown) via an α adjustment mechanism (not shown) and a nozzle arm that supports the α adjustment mechanism. The α adjusting mechanism arbitrarily changes the support direction so that the extending axis of the nozzle 21 is at an arbitrary angle with respect to the extending direction of the nozzle arm, and the position and the steam ejection angle (α adjusting mechanism). It is possible to fix the angle α) adjusted by.

  In the air curtain generating unit, the air supply unit 45 is disposed at one inner edge of the opening 67 and the intake unit 47 is disposed at the opposite inner edge so that the opening 67 can be closed by the air curtain 43. That is, the gas supplied from the air supply unit 45 in a substantially linear shape is sucked by the intake unit 47 while maintaining the linear shape to some extent. Thereby, what is called a curtain by the flow of gas is generated between these units. With the air curtain 43, the cleaning space 63 that is the inside of the cleaning tank 61 is separated from the external space with respect to the gas. In this aspect, in the steam supply system, the tip of the nozzle 21 that actually performs the operation of spraying the cleaning steam (the part from which the steam is ejected) exists inside the cleaning space 63 beyond the air curtain 43. It is said. The air curtain 43 prevents leakage of steam or water droplets that are ejected from the nozzle 21 and splashed around the work 30 or the work tray 31 to the outside of the cleaning space 63. Therefore, the drive system of the nozzle 21 does not come into contact with these vapors.

  The control plate 62 has a function of allowing vapor that has not contributed to the cleaning of the workpiece 30 or so-called sewage water that has contributed to cleaning to be condensed and liquefied, and escapes to the lower portion of the control plate 62. Further, the control plate 62 further prevents the vapor ejected from the nozzle 21 from directly reaching the trap 65 and prevents the vapor or the like from being reflected on the bottom surface or the lower inner surface of the cleaning tank 61 and rising. By disposing the control plate 62, the steam or minute water droplets that no longer contribute to cleaning can be quickly retreated from the space above the work tray 31, and the work such as steam once reaching the lower part of the cleaning space 63 can be removed. Circulation to the upper space of the tray 31 can be prevented.

  The exhaust opening cover 64 prevents a gas containing a large amount of steam or minute water droplets from reaching the exhaust opening 69 directly. By disposing the exhaust port cover 64, the time required for the vapor ejected from the nozzle 21 to reach the exhaust opening 69 is lengthened, and the rate at which these vapors are condensed and liquefied and collected in the trap 65 is increased. It becomes possible to raise. Further, in combination with the control plate 62 described above, the liquid collection rate of the trap 65 can be further increased, the liquid reaching the blower exhaust system can be reduced, and the exhaust efficiency of the blower exhaust system can be suitably maintained. Become. In addition, since it is not necessary to separate the liquid in the vicinity of the blower, it is possible to use a blower exhaust system having a relatively simple configuration.

  Next, the nozzle 21 and the configuration associated therewith and the configuration associated with the air curtain generating unit will be described. The high-temperature and high-pressure steam is supplied to the nozzle 21 through a steam supply path 23. The steam supply path 23 is connected to the nozzle 21 on the downstream side, and connected to a high-pressure steam generation unit 29 including the two-fluid nozzle 25 and the fluid heating device 100 on the upstream side. The two-fluid nozzle 25 is supplied with pure water and high-pressure so-called compressed air (compressed air) from the pure water source 22 and the high-pressure air source 24. In the two-fluid nozzle 25, these pure water and compressed air are mixed, and the fluid obtained by the mixing is heated by the fluid heating device 100, thereby generating high-temperature and high-pressure steam. The steam generated by the high-pressure steam generation unit 29 is sent to the nozzle 21 via the steam supply path 23.

  Here, for example, when the work 30 that is the object to be cleaned is made of a soft material and excessive pressure is applied to spray the steam, there is a possibility that the work 30 may be damaged in some way. . In such a case, in order to obtain a sufficient cleaning effect without damaging the work 30, it is necessary to optimize the spray pressure (supply pressure) and temperature of the steam to be sprayed. Normally, the supply pressure is controlled by adjusting the pressure of the compressed air supplied to the two-fluid nozzle 25 and the degree of fluid heating by the fluid heating device 100. However, it is necessary to change the supply pressure and the heating temperature in consideration of the volume of the gas containing the steam generated by the high-pressure steam generation unit 29 or the saturated steam pressure. For this reason, in actual pressure control, it is necessary to consider very complicated parameters, and in fact, only cleaning by fixing the pressure can be performed at present. In addition, regarding the above-described temperature, simply controlling the heating temperature of the granule heating apparatus 100 also causes pressure fluctuations, so that it is difficult to control the steam temperature at the same time.

  In the present embodiment, the bypass path 33 is arranged in order to control the pressure and temperature of the steam supplied to the nozzle 21. The bypass path 33 is connected to the vapor supply path 23 and communicates with a trap 65 at a lower portion of the cleaning space 63 via a bypass communication port 37. A bypass valve 35 is disposed in the bypass path 33. By separating an appropriate amount of steam from the steam supply path 23 via the bypass path 33 and directly discharging it to the vicinity of the trap 65, the pressure of the steam supplied to the nozzle 21 can be mechanically controlled.

  That is, the bypass path 33 has a role of reducing the flow rate or pressure of the steam reaching the nozzle by flowing a part of the steam supplied to the steam supply path 23 other than the nozzle 21. Further, by adjusting the opening degree of the bypass valve 35, it is possible to control the flow rate of steam removed from the bypass path 33 and adjust the pressure in the steam supply path 23, that is, the supply pressure to the nozzle 21. Furthermore, it is possible to control the steam temperature separately from the pressure, and it is possible to obtain steam appropriately adjusted to the optimum temperature. That is, it is preferable to control at least one of the flow rate or the pressure of the steam reaching the nozzle 21 by the bypass valve 35 and thereby adjust the pressure of the steam sprayed on the work 30.

  In the present embodiment, the compressed air is branched from the high-pressure air source 24 and supplied to the air supply unit 45 in the air curtain generation unit 41. A flow rate adjustment valve (not shown) is arranged between the high pressure air source 24 and the air supply unit 45. The air supply unit 45 is, for example, a round pipe in which arbitrary small holes are continuously formed on the same ridge line, and a form in which compressed air is supplied from both ends of the round pipe can be exemplified. That is, it has a width sufficient to completely overlap a specific side of, for example, a rectangular opening 67 in the cleaning tank 61, and is substantially linear (even if gas is ejected from a small hole, it is predetermined from the small hole opening. It suffices if the airflows overlap each other at a distance from each other, and an airflow having a substantially sheet shape and a linear cross section is generated.

  The intake unit 47 is arranged on one side opposite to a specific side where the above-described air supply unit 45 is arranged, and the above-described linear airflow can be sucked in a region where the one side can be completely overlapped. Specifically, it is provided as a linear or elongated rectangular suction port opening in the region. The suction port 49 is connected to an air curtain exhaust path 51 and is supplied in a line form forming the air curtain 43 via the air curtain exhaust path 51 connected to a blower exhaust system (not shown). The airflow is sucked and exhausted. The air curtain 43 is in contact with a gas containing a large amount of steam on the surface on the cleaning space 63 side. For this reason, the gas which generated the air curtain 43 that has reached the suction port 49 is in a state containing a large amount of water vapor. When such gas is exhausted by the blower exhaust system as it is, there is a possibility that an adverse effect due to humidity may occur on the blower.

  In this embodiment, in order to liquefy such vapor, a so-called labyrinth-like space 53 is arranged immediately after the suction port 49 and between the air curtain exhaust passage 51. The labyrinth-like space 53 is a stenosis path in which a plurality of bent portions are continuously arranged, the exhaust path is extended by arranging the stenosis path, and the gas passing through the path is a little as much space as possible. The purpose is to contact the inner wall. When passing through the labyrinth-like space 53, the vapor contained in the gas is condensed on the inner wall of the space, and the amount (inclusion ratio) of the vapor reaching the subsequent blower can be reduced.

  In order to discharge the collected vapor, a second drain port (not shown) for liquid exclusion is actually arranged below the labyrinth-like space 53. That is, the labyrinth-like space 53 described here functions as a moisture lowering unit that reduces the amount of moisture contained in the air curtain 43. In addition, this form is employ | adopted because a certain amount of moisture reduction function can be anticipated only by a structure. However, the form of the configuration is not limited to this, and for example, if a temperature management control function or the like can be added, a cooling plate or the like that adsorbs and retains moisture may be used instead of the cooling plate. Various forms can be applied.

  By using the fluid heating apparatus 100 described above, it is possible to heat the liquid with a simple and inexpensive configuration. Further, by constructing a high-pressure steam cleaning device using the fluid heating device, the cost required for constructing the steam cleaning device can be greatly reduced.

  As described above, since the fluid heating device according to the present invention has a simple structure, the construction of the device is easy and inexpensive, and can be used for heating various fluids and further for vaporization. In addition, the cleaning device according to the present invention using the fluid heating device uses high-temperature and high-pressure steam as a battlefield medium, so that, for example, a residue such as cutting fluid in a magnetic head core which is a fine electronic component can be formed in a fine space. It is possible to suitably remove contaminants that are fitted and difficult to remove by conventional cleaning methods. In addition, by using the fluid heating device according to the present invention, it is easy to control the spray pressure of steam at the time of cleaning or the steam temperature. Therefore, the present invention can be applied not only as a cleaning device for fine electronic components but also as a cleaning device for a cleaning object having a complicated shape having a region that is difficult to clean, and also a cleaning object made of a so-called soft material. is there.

3: Cartridge heater, 5: Thermocouple, 7: Fluid passage, 7a: Inlet, 7b: Outlet, 9: Heater case, 9a: Hollow part, 9b: Inside the case, 11 Heat conduction piece, 13: Case receiver, 15: Exterior, 17: Insulating material, 21: Nozzle, 22: Pure water source, 23: Steam supply path, 24: High-pressure air source, 25: Two-fluid nozzle, 29: High-pressure steam generating unit, 30: Work, 31: Work Tray, 33: Bypass path, 35: Bypass valve, 37: Bypass communication port, 43: Air curtain, 45: Air supply unit, 47: Intake unit, 49: Suction port, 51: Exhaust path for air curtain, 53: Labyrinth 61: Cleaning tank, 62: Control plate, 63: Cleaning space, 64: Exhaust opening cover, 65: Trap, 66: Drain , 67: opening, 69: exhaust opening, 100: fluid heating apparatus, 200: high pressure steam cleaning device

Claims (5)

A fluid heating apparatus having a fluid passage having a fluid inlet and an outlet and heating fluid passing through the fluid passage,
A heating source;
A heater case containing the fluid passage and the heating source inside;
A heat conduction piece that is filled in the heater case and transmits heat generated by the heating source to the fluid passage,
The fluid heating device, wherein the heat conduction piece is filled so as to cover the heating source and the fluid passage inside the heater case.   2. The fluid heating apparatus according to claim 1, wherein the heat conducting pieces are filled at a predetermined filling density so as to form a gap in the heater case.   The fluid heating device according to claim 1, wherein the heat conduction piece includes two or more types having different sizes and shapes at a predetermined ratio. A temperature measuring means arranged inside the heater case to measure the internal temperature of the heater case;
A heat insulator that covers the heater case and keeps the heater case warm,
The fluid heating device according to any one of claims 1 to 3, wherein the fluid passage is obtained by forming a tubular member into a spiral shape. A high-pressure steam cleaning apparatus that performs cleaning of the object to be cleaned by spraying high-pressure steam on the object to be cleaned,
A high-pressure steam generating unit that generates the high-pressure steam using a high-temperature fluid obtained from the fluid heating device according to any one of claims 1 to 4;
A nozzle connected to the high-pressure steam generating unit and capable of ejecting the high-pressure steam to the object to be cleaned from an arbitrary position and direction;
A cleaning tank having a tank structure that has an opening opening in the specific part and can accommodate the object to be cleaned inside;
The steam blowing portion of the nozzle can be located inside the cleaning tank, and is located inside the cleaning tank to spray the high-pressure steam onto the object to be cleaned. High pressure steam cleaning equipment.

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