Self-powered air heater using pellets

Abstract

The present invention provides a self-powered air heater using pellets, comprising: a combustion part for generating combustion heat while pellets are combusted in a combustion container provided in a lower portion within a combustion chamber; a pellet input part which is provided adjacent to the combustion part, and which supplies a predetermined amount of pellets to the combustion container; a heat exchange part provided adjacent to the combustion part with a heat transfer surface therebetween so as to allow heat exchange between the combustion heat generated in the combustion part and external air flowing into a heat exchange chamber, thereby generating heated air; a blowing fan which is provided at a lower portion in the heat exchange chamber, and which rotates by means of the rotational force generated by a first motor so as to suction the external air into the heat exchange chamber through an intake port of the heat exchange part and discharge, through a discharge port of the heat exchange part, the air heated in the heat exchange chamber; an exhaust chamber which is connected to one side of the combustion part by means of an exhaust duct so as to allow the air to flow therethrough, and which collects exhaust gas having passed through the combustion chamber of the combustion part and discharges same to the outside through an exhaust pipe; and an exhaust fan which is embedded in the exhaust chamber, and which rotates, simultaneously with the blowing fan, by means of the rotational force generated by the first motor, so as to forcibly discharge the exhaust gas by means of suction force.

Description

Self-generating pellet heater

[0001] The present invention relates to a self-generating pellet hot air blower that converts thermal energy generated by the combustion of pellets into electrical energy for self-power without external power input, and more specifically, to a camping self-generating pellet hot air blower that minimizes power consumption by optimizing the driving process to increase heating efficiency, and also conveniently removes soot or tar contained in the combustion gas adhering to the surface of the heat transfer tube, and conveniently collects ash, ash, and clinker remaining in the combustion chamber after the pellets are burned by shaking them off.

[0002] Generally, pellet heaters are heating devices that use woody biomass wood pellets as fuel. Unlike convection stoves, they heat the room by using a blower fan to force cold air into the heat transfer tubes as the hot air generated from burning wood pellets passes through, thereby exchanging heat with the hot air.

[0003] These pellet hot air blowers typically burn wood pellets supplied to a burner inside the combustion chamber, recover heat from the combustion gas produced to generate hot air, and have a structure that releases the smoke generated during the combustion process to the outside.

[0004] However, most conventional pellet hot air blowers are of the grate type burner, which injects external air through a hole drilled in the lower part of the combustion chamber where the pellets are burned, and adopt a screw fuel feeder method for fuel supply. As a result, after a certain period of time, pellet powder accumulates on the screw, causing not only improper fuel supply but also frequent breakdowns due to clogging caused by slag.

[0005] In addition, a significant amount of pellets destroyed by the screw are supplied to the combustion chamber in powder form and are easily floated and dispersed by air injected from below, acting as kindling and causing incomplete combustion and ash generation. Furthermore, changes in air pressure and temperature cause backflow of exhaust gases through the screw and flashback of the flame, resulting in smoke generation and a high risk of fire.

[0006] Furthermore, due to the characteristics of fixed grate burners, there is a problem where combustion efficiency is reduced because ash, clinker, and other materials do not fall properly to the bottom of the combustion chamber and accumulate unevenly when low-grade pellets are used or when the system is operated for a long time.

[0007] Furthermore, when pellets undergo incomplete combustion, fine carbon particles such as soot, dust, and tar contained in the combustion gas stick to the surface of the heat transfer tube, hindering heat transfer and causing a significant decrease in heat exchange efficiency.

[0008] Meanwhile, conventional pellet heaters have limitations in use because they cannot be used without a power source, such as electric energy required for the operation of electric motors, during various leisure activities where temporary outdoor living is enjoyed, such as fishing, trekking, and camping.

[0009] It is stated that the background technology or prior art described herein refers to information possessed by the inventor or acquired during the process of deriving and completing the present invention, and is specified merely to aid in understanding the technical significance of the present invention and to be useful for prior art search and examination, and does not mean technology that was generally known and widely used in the technical field to which the invention belongs prior to the filing of the present invention.

[0010] Accordingly, the inventors of the present invention, while comprehensively considering the aforementioned matters and with the idea of ​​solving the technical limitations and problems of existing technology, have devised the present invention as a result of tireless research and strenuous efforts to develop a self-generating pellet hot air heater with a new structure that can convert thermal energy generated by the combustion of pellets into electrical energy without external power input and use it for self-power, as well as minimize power consumption by optimizing the driving process to increase heating efficiency, and can also easily remove and clean fine carbon particles such as soot, dust, and tar contained in the combustion gas that stickily adheres to the surface of the heat transfer tube, and automatically shake off and collect combustion residues such as ash, ash, and clinker remaining in the combustion chamber after the pellet combustion.

[0011] Therefore, the technical problem and objective that the present invention aims to solve is to provide a self-generating pellet air heater that can minimize power consumption.

[0012] Another technical problem and objective of the present invention is to provide a self-generating pellet hot air blower that can easily remove fine particles of carbon powder that stickily adhere to the surface of a heat transfer tube.

[0013] Another technical problem and objective of the present invention is to provide a self-generating pellet hot air blower capable of automatically shaking off and collecting combustion residues, such as ash, powder, and clinker, remaining in the combustion chamber.

[0014] The technical problems and objectives that the present invention aims to solve are not limited to those mentioned above, and other unmentioned technical problems and objectives will be clearly understood by those skilled in the art from the description below.

[0015] A specific means according to an embodiment of the present invention for effectively achieving a specific technical purpose while embodying a new concept for solving the technical problem of the present invention as described above comprises: a combustion unit that generates combustion heat as pellets are combusted in a combustion tube installed at the bottom of a combustion chamber; a pellet input unit installed adjacent to the combustion unit and supplying a certain amount of pellets to the combustion tube; a heat exchange unit installed adjacent to the combustion unit with a heat transfer surface in between, which creates heated air by exchanging the combustion heat generated in the combustion unit with the outside air flowing into the heat exchange chamber; a blower fan installed at the bottom of the heat exchange chamber and rotating by the rotational force generated by a first motor to draw outside air into the heat exchange chamber through the intake port of the heat exchange unit and discharge heated air within the heat exchange chamber through the discharge port of the heat exchange unit; an exhaust chamber connected to one side of the combustion unit by an exhaust duct to allow air to pass through, which collects exhaust gas coming out of the combustion chamber and discharges it to the outside through an exhaust pipe; and a device built into the exhaust chamber and simultaneously generated by the first motor in conjunction with the blower fan A self-generating pellet hot air blower is presented, characterized by employing an exhaust fan that rotates by rotational force to draw in exhaust gas from the combustion chamber by suction force and forcibly discharge it.

[0016] Thus, the present invention can minimize power consumption and maximize heat conduction efficiency by optimizing the driving process of the blower fan and the exhaust fan for increasing heating efficiency into a single electric motor.

[0017] In addition, in a preferred embodiment of the present invention, the heat exchanger may be configured to include a plurality of heat transfer tubes that are formed in a vertically elongated hexagonal shape and installed at a constant horizontal interval above the combustion section, and which generate heated air by exchanging the combustion heat generated in the combustion section with the outside air flowing into the internal space by the blower fan, and a scraper that has a plurality of clearance holes formed on the inside in a shape corresponding to the outer shape of the heat transfer tubes, and slides along the length direction of the heat transfer tubes by pulling a lever to scrape off and remove fine particles of carbon powder adhering to the surface of the heat transfer tubes.

[0018] Thus, the present invention can improve heat exchange efficiency by conveniently removing and cleaning fine particles of carbon powder, such as soot, dust, and tar, that stick to the surface of the heat transfer tube and hinder heat transfer.

[0019] In addition, in a preferred embodiment of the present invention, the pellet input unit comprises a pellet container for storing a certain amount of pellets, a screw conveyor mounted at the bottom of the pellet container that automatically transports a certain amount of pellets stored in the pellet container by the rotational force of a second motor and supplies them to the combustion container, and a bevel gear fixed to the motor shaft of the second motor. The combustion unit may comprise a grate bearer installed at the bottom of the combustion chamber and supporting the combustion container, a guide groove formed at the bottom of the combustion container, a ash filter installed to slide along the guide groove while supporting the pellets inside the combustion container and having a plurality of ventilation holes arranged on the inside, and a connecting rod with both ends connected to the bevel gear and the ash filter, respectively, by pin joints so that the rotational movement of the bevel gear is converted into the linear reciprocating movement of the ash filter.

[0020] Thus, the present invention can supply pellets to the combustion chamber while simultaneously automatically shaking combustion residues such as ash, ash, and clinker remaining inside the combustion chamber and dropping them onto the ash tray.

[0021] In addition, as a preferred embodiment of the present invention, the combustion unit may further comprise a flow plate mounted on the inner upper part of the combustion chamber to guide pellets supplied from the screw conveyor to fall into the middle part of the combustion chamber, a rake mounted on the lower middle part of the combustion chamber to evenly flatten the pellets dropped through the flow plate during the linear reciprocating motion of the ash filter so that the flame spreads widely and rises, and an ash catcher installed on the lower side of the combustion chamber to receive ash falling from the combustion chamber.

[0022] Thus, the present invention creates a horizontally elongated flame shape to heat the entire stud evenly, thereby increasing not only hot air efficiency but also power generation efficiency.

[0023] In addition, a preferred embodiment of the present invention may further comprise a stud that is attached at regular intervals to a vertical heat transfer surface between the heat exchanger in the combustion chamber and increases the heat absorption rate by increasing the heat transfer surface area; a thermoelectric element module that is attached to a vertical heat transfer surface within the heat exchanger in the combustion chamber and converts thermal energy transmitted through the stud into electrical energy; a capacitor that stores electrical energy transmitted from the thermoelectric element module and supplies current to the first and second motors; a heat sink attached to the surface of the thermoelectric element module and draws heat from the surface of the thermoelectric element module and releases it into the air flowing into the internal space; a temperature sensor attached to the heat sink that detects temperature changes and transmits an electrical signal; and a controller that controls the operation of the second motor and the thermoelectric element module based on temperature information transmitted from the temperature sensor and controls the current supplied from the capacitor to the first and second motors.

[0024] Thus, the present invention generates its own thermoelectric power without an external power input and can be used as operating power, thereby being free from power supply, allowing for convenient use outdoors such as during camping, as well as achieving a reduction in heating costs.

[0025] In addition, if the temperature value transmitted from the temperature sensor is higher than a predetermined temperature value, the operation of the second motor is stopped and the supply of pellets is automatically cut off, thereby increasing safety by preventing overheating.

[0026] In addition, a preferred embodiment of the present invention may further include an intake duct that connects the lower part of the combustion chamber and the lower part of the heat exchange chamber to allow air to pass through.

[0027] Thus, the present invention can forcibly blow some of the outside air entering the interior of the heat exchange chamber by means of a blower fan into the lower part of the combustion chamber, thereby inducing smooth combustion so that almost no ash remains, and significantly increasing the heat output.

[0028] According to an embodiment that implements the technical concept on which a unique solution means is based to solve the technical problem of the present invention, the driving process of the blower fan and the exhaust fan is optimized with a single electric motor to minimize power consumption, and furthermore, since a strong wind is stably blown into the combustion chamber when the blower fan operates, the combustion speed is increased to increase the heat output, thereby maximizing thermal efficiency and heat conduction efficiency.

[0029] In addition, since the exhaust fan forcibly expels exhaust gases from the combustion chamber, the length of the exhaust pipe can be reduced, and backflow of exhaust gases, flame flashback, and smoke generation caused by changes in air pressure and temperature can be prevented.

[0030] In addition, since it generates its own thermoelectric power without an external power input, it is free from power supply constraints, allowing for convenient use outdoors, such as during camping, as well as providing heating cost savings.

[0031] Moreover, as the scraper slides along the length of the heat transfer tube by pulling the lever, it scrapes off fine particles of carbon powder, such as soot, dust, and tar, that stick to the surface of the heat transfer tube and hinder heat transfer, thereby improving heat exchange efficiency.

[0032] Furthermore, while supplying pellets to the combustion chamber, combustion residues such as ash, powder, and clinker remaining inside the chamber are automatically shaken and dropped onto the ash tray, thereby preventing a decrease in combustion efficiency caused by the accumulation of combustion residues inside the chamber.

[0033] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims.

[0034] FIG. 1 is a perspective view showing a self-generating pellet hot air heater according to an embodiment of the present invention as viewed from the front.

[0035] FIG. 2 is an exploded perspective view showing the main elements constituting a self-generating pellet hot air blower according to an embodiment of the present invention as viewed from the front.

[0036] FIG. 3 is an exploded perspective view showing the main elements constituting a self-generating pellet hot air blower according to an embodiment of the present invention as viewed from the rear.

[0037] FIG. 4 is a perspective view showing some of the main elements constituting a self-generating pellet hot air heater according to an embodiment of the present invention as viewed from the front.

[0038] FIG. 5 is an exploded perspective view showing some of the main elements constituting a self-generating pellet hot air heater according to an embodiment of the present invention as viewed from the rear.

[0039] FIG. 6 is an exploded perspective view showing a combustion chamber, which is one of the main elements constituting a self-generating pellet hot air blower according to an embodiment of the present invention.

[0040] FIG. 7 is a local perspective view showing the normal position and state of a ash filter, which is one of the main elements constituting a self-generating pellet hot air blower according to an embodiment of the present invention.

[0041] FIG. 8 is a local perspective view showing the operating state of a ash filter, which is one of the main elements constituting a self-generating pellet hot air blower according to an embodiment of the present invention.

[0042] FIG. 9 is a local perspective view showing the normal position and state of a scraper among the main elements constituting a self-generating pellet hot air blower according to an embodiment of the present invention.

[0043] FIG. 10 is a local perspective view showing the operating state of a scraper, which is one of the main elements constituting a self-generating pellet hot air blower according to an embodiment of the present invention.

[0044] FIG. 11 is a rear view to aid understanding of the operation description of a self-generating pellet hot air blower according to an embodiment of the present invention.

[0045] FIGS. 12 and 13 are side cross-sectional views to aid in understanding the operation description of a self-generating pellet hot air blower according to an embodiment of the present invention.

[0046] Hereinafter, embodiments according to the present invention will be described in more detail with reference to the attached drawings.

[0047] Prior to this, it is specified that the terms described below are defined in consideration of their functions in the present invention, and should be interpreted in accordance with the concept consistent with the technical spirit of the present invention and the meaning commonly accepted or recognized in the relevant technical field.

[0048] In addition, if it is determined that a detailed description of known functions or configurations related to the present invention could obscure the essence of the present invention, such detailed description is omitted.

[0049] It is stated that the attached drawings may be partially exaggerated or simplified for the purpose of explaining the configuration, operation, and operating principles of the technology, as well as for ease of understanding and clarity of the technology, and that each component in the drawings does not exactly correspond to the actual size and shape.

[0050] In addition, the term "and / or" in this specification means a combination of multiple related described items or includes any of the multiple related described items, and when a part is said to include a certain component, it means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0051] In other words, terms such as "comprising" and "having" as set forth in this specification mean that there is a feature, number, step, process, operation, component, part, or combination thereof, and should be understood as not excluding the existence or addition of one or more other features, numbers, steps, processes, operations, components, parts, or combinations thereof.

[0052] Meanwhile, the terms "part" and "unit" used in the present invention refer to a unit or module form that performs a role in processing at least one intended function or a certain operation in a device or system, and this can be implemented through means such as hardware, software, or a combination of hardware and software, or a device or assembly capable of performing independent operations.

[0053] And the term "module" as used in the present invention may mean a unit comprising one or more combinations of hardware, software, or firmware, may be the smallest unit or part thereof of a component formed integrally, may be the smallest unit or part thereof that performs one or more functions, and may be implemented mechanically or electronically.

[0054] Furthermore, terms such as top, bottom, upper surface, lower surface, or upper, lower, upper side, lower side, front / rear, left / right, etc. used in the present invention are used for convenience to distinguish relative positions or explain directions of movement for each component. For example, the upper part of a drawing may be named or referred to as the upper part and the lower part as the lower part, and the length direction may be named or referred to as the front / rear direction and the width direction as the left / right direction.

[0055] In addition, terms such as "first," "second," etc. used in the present invention may be used to describe various components. That is, terms such as "first," "second," etc. may be used solely for the purpose of distinguishing one component from another.

[0056] [Form for carrying out the invention]

[0057] As illustrated in FIGS. 1 to 6, the main elements constituting a self-generating pellet hot air blower according to an embodiment of the present invention include a combustion unit (100), a pellet input unit (200), a heat exchange unit (300), a blower fan (400), an exhaust chamber (500), an exhaust fan (600), a thermoelectric element module (700), and a controller (800).

[0058] The combustion unit (100) has a combustion chamber (110) formed vertically in which the combustion of pellets takes place, and a great bearer (111) is installed at the bottom of the combustion chamber (110) to support the combustion container (120) horizontally.

[0059] And on top of the great bearer (111), a combustion chamber (120) is installed to generate combustion heat as pellets are burned.

[0060] And ventilation holes (121) are drilled on all sides of the combustion chamber (120), and a guide groove (122) is formed in the lower part.

[0061] Additionally, a ash filter (123) is installed on the bottom of the combustion chamber (120) so as to slide along the guide groove (122).

[0062] And inside the ash filter (123), a plurality of ventilation holes (124) are formed in a regular pattern to filter out the ash produced by burning pellets.

[0063] And a flow plate (125) is installed on the inner upper part of the combustion chamber (120) to guide pellets supplied from the screw conveyor (220) to fall into the middle part of the combustion chamber (120).

[0064] In addition, a rod-shaped rake (126) is fixed to the lower middle part of the combustion chamber (120) to evenly flatten the pellets dropped through the flow plate (125) during the linear reciprocating motion of the ash filter (123), causing the flame to spread widely and rise.

[0065] And as shown in FIGS. 7 and 8, a connecting rod (130) is installed between the bevel gear (222) and the rag cleaner (123) to convert the rotational motion of the bevel gear (222), which is fixed to the motor shaft of the second motor (221), into the linear reciprocating motion of the rag cleaner (123).

[0066] That is, the connecting rod (130) has both ends connected to the bevel gear (222) and the rag picker (123) respectively by pin joints.

[0067] Here, a thin, long rod-shaped link (132) is connected between the rear end of the connecting rod (130) and the sifter (123) by a pin joint, and the link (132) is guided by a guide bush (131) that guides the sliding operation to be stable, thereby allowing the link (132) to perform a constant limited movement in the horizontal direction without shaking, so that the rotational movement of the bevel gear (222) can be converted into the linear reciprocating movement of the sifter (123) while moving more smoothly and softly.

[0068] And at the bottom of the combustion chamber (110), an ash catcher (140) is provided to receive ash falling from the combustion container (120).

[0069] And a stud (150) is attached to the vertical heat transfer surface between the heat exchange chamber (310) and the combustion chamber (110) to increase the heat absorption rate by increasing the heat transfer area.

[0070] That is, several studs (150) are attached at regular intervals on the vertical heat transfer surface between the heat exchange chamber (310) and the combustion chamber (110).

[0071] And a hinged door (160) for opening and closing the combustion chamber (110) is installed on the front of the combustion section (100).

[0072] Additionally, a viewing window (161) is formed at the top of the door (160) to easily check and observe the internal condition from the outside, and an ignition hole (162) is drilled at the bottom to insert an ignition rod.

[0073] That is, in order to manually ignite the pellets inside the combustion chamber (120) with an ignition rod that generates a flame, such as a butane gas torch (T), an ignition hole (162) is drilled through the door near the combustion chamber (120) at the front of the combustion chamber (110).

[0074] A pellet input section (200) is installed adjacent to the combustion section (100) to supply a certain amount of pellets to the combustion chamber (120).

[0075] Specifically, the pellet input section (200) is configured to include a pellet container (210) and a screw conveyor (220).

[0076] The pellet container (210) is formed in the shape of a container that stores a certain amount of pellets.

[0077] And on the upper surface of the pellet container (210), that is, the upper surface of the pellet input section (200), an input port (211) is formed for feeding pellets into the pellet container (210) from the outside, and a gate (212) is installed for opening and closing the input port (211).

[0078] In addition, a slanted trough-shaped hopper (213) is integrally formed at the bottom of the pellet container (210) so that the pellets slide down naturally onto the screw conveyor (220).

[0079] The screw conveyor (220) is mounted on the bottom of the pellet container (210).

[0080] That is, the screw conveyor (220) automatically transports a certain amount of pellets stored in the pellet container (210) by the rotational force of the second motor (221) and supplies them to the combustion container (120).

[0081] And a bevel gear (222) that rotates simultaneously with the screw conveyor (220) is connected to the motor shaft of the second motor (221).

[0082] That is, the second motor (221) has its motor shaft (operating shaft) directly coupled to the rotation shaft of the screw conveyor (220) in order to simultaneously transmit rotational force to the screw conveyor (220) and the bevel gear (222) according to the opening / closing signal of the controller (800).

[0083] Through this, the screw conveyor (220) is directly connected to the motor shaft of the second motor (221) to obtain rotational force, and since there is no medium to transmit rotation, there is no slip loss and noise, and a stable rotational speed can be obtained.

[0084] Here, the second motor (221) can be a conventional electric motor that converts electrical energy into mechanical energy to obtain rotational power, is easy to start (drive) and operate by signal current, is easy to select a model suitable for the load, has low noise and vibration, and is free from exhaust pollution.

[0085] For example, it is desirable to adopt and apply a servo motor that rotates at a constant angle by converting the voltage input according to the magnitude of the applied voltage or signal into a rotation angle so that stopping and reversing operations are performed quickly, or a stepping motor that controls speed and direction by rotating at a constant angle each time a pulse signal is given.

[0086] In addition, a geared motor including a reduction gear that reduces the motor's rotational speed to output the power required for driving may be adopted and applied, or a hydraulic motor that generates power by applying high pressure generated by a hydraulic pump driven by a motor or engine to the operating shaft so that operation is reliable, automatic remote operation is possible, and speed adjustment, stopping, and reversing are easily accomplished may be adopted and applied.

[0087] In addition, it goes without saying that motors such as VS motors, DC motors, and gear motors equipped with inverters, as well as electric motors with built-in or combined reduction gear mechanisms, can be adopted and applied to vary the pellet supply speed by adjusting the rotational speed.

[0088] The heat exchange section (300) has a heat exchange chamber (310) formed vertically in which heat exchange occurs, and is installed adjacent to the combustion section (100) with the heat transfer surface in between.

[0089] That is, the heat exchanger (300) uses the combustion heat generated in the combustion unit (100) to exchange heat with the outside air flowing into the heat exchange chamber (310) through the intake port (320) to create heated air, and then discharges it through the discharge port (330).

[0090] And inside the upper discharge port (330) within the heat exchange chamber (310), a plurality of heat transfer tubes (340) are installed to create heated air by exchanging the combustion heat generated in the combustion section (100) with the outside air flowing into the internal space by the blower fan (400).

[0091] That is, the heat transfer tube (340) is formed to be long in the horizontal direction so that outside air passes through it and comes into contact with the combustion gas on the outside to transfer heat of the combustion gas, and has a vertically long hexagonal cross-section to smoothly discharge heat and prevent ash from accumulating easily, and is installed at a constant interval in the horizontal direction on the upper side of the combustion section (100).

[0092] And the heat exchanger (300) is equipped with a scraper (350) for scraping off and removing fine particles of carbon powder that are attached to the surface of the heat transfer tube (340).

[0093] That is, as shown in FIGS. 9 and 10, a plurality of clearance holes (351) are formed on the inside of the scraper (350) in a shape corresponding to the outer shape of the heat transfer tube (340), and a lever (352) is integrally formed on the front of the scraper (350), so that fine particles of carbon powder attached to the surface of the heat transfer tube (340) can be scraped off and removed by sliding along the longitudinal direction of the heat transfer tube (340) by the user’s operation of pulling the lever (352).

[0094] And at the bottom of the heat exchange chamber (310), an intake duct (360) is provided to allow air to pass through by connecting it to the bottom of the combustion chamber (110).

[0095] That is, the intake duct (360) can forcibly blow some of the outside air flowing into the interior of the heat exchange chamber (310) by the suction force of the blower fan (400) into the lower part of the combustion chamber (120) inside the combustion chamber (110).

[0096] And at the top of the heat exchange chamber (310), a guide vane (370) is installed to change the direction of the flow of the outside air, which is drawn into the interior of the heat exchange chamber (310) by the suction force of the blower fan (400) and rises vertically, to horizontal and adjust the amount so that the heat transfer tube (340) naturally enters the interior.

[0097] The blower fan (400) is installed in the lower part of the heat exchange chamber (310) while fixed to the motor shaft of the first motor (410) to artificially create a fast and strong airflow.

[0098] That is, the blower fan (400) rotates by the rotational force generated by the first motor (410) and forcibly sucks in outside air from the center of the disc into the interior of the heat exchange chamber (310) through the intake port (320) of the heat exchange unit (300) and discharges it outward by centrifugal force, and sends heated air inside the heat exchange chamber (310) to the discharge port (330) of the heat exchange unit (300).

[0099] Here, it is preferable to adopt and apply a cross-flow fan (400) in which the fluid flows in a manner that crosses the blades.

[0100] That is, since the blower fan (400) discharges the incoming wind in a transverse direction along the circumference of the housing, the wind speed and airflow distribution is wide and uniform over the entire length of the impeller, so there is less noise and less vortex generation, so the discharged airflow can be concentrated and reach a long distance.

[0101] Meanwhile, the first motor (410) can be driven according to the control and power supply of the controller (800) to simultaneously rotate the blower fan (400) and the exhaust fan (600) fixed to the motor shaft.

[0102] Here, the first electric motor (410) can be used to drive the machine by using a conventional electric motor (electric motor) that converts electrical energy into mechanical energy to obtain rotational power, such as a motor drive, and is easy to start (drive) and operate by a signal current from the controller (800), is easy to select a model suitable for the load, has low noise and vibration, and is free from exhaust pollution.

[0103] For example, a motor drive using an induction motor that operates by the rotational force generated by the interaction between the rotating magnetic field generated by the alternating current flowing through the stator windings and the induced current generated in the rotor can be employed.

[0104] The exhaust chamber (500) is connected to one side of the combustion chamber (110) by an exhaust duct (510) to allow air to pass through.

[0105] That is, the exhaust chamber (500) collects exhaust gas coming out of the combustion chamber (110) of the combustion unit (100) through the exhaust duct (510) and discharges it to the outside through the exhaust pipe (520).

[0106] The exhaust fan (600) is installed in the internal space of the exhaust chamber (500) while being fixed to the motor shaft of the first electric motor (410) to artificially create a fast and strong airflow.

[0107] That is, the exhaust fan (600) is built into the exhaust chamber (500) to rotate simultaneously with the blower fan (400) by the rotational force generated by the first electric motor (410) to suck in the exhaust gas inside the combustion chamber (110) with suction force and forcibly discharge it.

[0108] Here, it is preferable to adopt and apply a sirocco fan with a structure that blows air by means of multiple curved blades as the exhaust fan (600).

[0109] The thermoelectric element module (700) is attached to a vertical heat transfer surface between the combustion section (100) and the heat exchange chamber (310) to convert thermal energy transferred through the stud (150) in the combustion chamber (110) into electrical energy.

[0110] Here, the thermoelectric element module (700) can adopt and apply a thermoelectric power generation method based on the Seebeck effect, which generates electricity from heat using the electromotive force generated when a temperature difference occurs between two different types of metals or semiconductors.

[0111] For example, a structure can be used in which a thermoelectric element is configured with multiple np semiconductor couples, each semiconductor is connected by a copper electrode, both sides of the thermoelectric element are insulated with 1 mm thick alumina (Al2O3) plates, and the thermoelectric element is arranged and inserted within an aluminum cooling block.

[0112] Meanwhile, in the internal space of the pellet input section (200), a capacitor (710) is installed to store electrical energy transmitted from the thermoelectric element module (700) and to supply current to the first and second motors (410) (221).

[0113] Here, the capacitor (710) is made of two metals separated by an insulator and can be used to store electric charge or electrical energy, and can be utilized for charging various electronic devices including smartphones.

[0114] And a heat sink (720) is attached to the surface of the thermoelectric element module (700) to draw heat from the surface of the thermoelectric element module (700) and release it into the air flowing into the internal space of the heat exchange chamber (310).

[0115] Here, it is preferable that the heat sink (720) be made of a material with excellent thermal conductivity, such as copper or aluminum.

[0116] In addition, a temperature sensor (730) is attached to one side of the heat sink (720) to detect and sense the temperature change and transmit an electrical signal to the controller (800).

[0117] For example, the temperature sensor (730) transmits an electrical signal to the controller (800) when the temperature value of the heat sink (720) is higher than a predetermined reference temperature, and the controller (800) can prevent overheating by stopping the operation of the second motor (221) based on the information sent from the temperature sensor (730) or when the temperature value transmitted from the temperature sensor (730) is higher than a predetermined temperature value.

[0118] A controller (800) is installed on one side of the housing of the pellet input section (200) to control the operation of the first and second motors (410) (221) overall.

[0119] That is, the controller (800) is built into the upper surface of the housing of the pellet input section (200) in the form of a touch-type operation and display panel to easily control the power supply, hot air temperature and time, and the blowing intensity of the blower fan (400) received from the user, and to display the current operating status.

[0120] And the controller (800) controls the operation of the second motor (221) and the thermoelectric element module (700) based on temperature information transmitted from the temperature sensor (730), and controls the current supplied from the capacitor (710) to the first and second motors (410) (221).

[0121] For example, the controller (800) is supplied with power by either a rechargeable method or a method of directly connecting to commercial power (AC), and can automatically determine whether to supply operating power to the first and second motors (410) (221) respectively according to user operation or by detecting indoor temperature, and can adjust the operation in steps and individually control the ON / OFF operation.

[0122] Additionally, the controller (800) may have a built-in timer for counting the operating time of the first and second motors (410) (221), and when the counted operating time reaches a predetermined set time, it may generate a signal to cut off the power supply and stop operation, transmit it to each of the drive units, and switch to a power saving mode.

[0123] In addition, the controller (800) may be equipped with a bimetal to detect when the heat emitted from the combustion chamber (120) overheats above a certain temperature and to cut off the power supplied to the first and second motors (410) (221), a lamp unit and a display unit to indicate the situation, such as when power is supplied and cut off or when it is heated above a set temperature.

[0124] Here, the controller (800) can be configured by integrating and linking the lamp unit, display unit, and communication unit into one unit in the form of a single-chip microprocessor mounted on a printed circuit board, and in addition, it can be composed of a control board that controls the first and second motors (410) (221) and performs each function by transmitting operation commands based on signals received through the communication unit.

[0125] [Operating Principles and Key Functions of Each Element]

[0126] The main operation, operating principle, and function of the self-generating pellet hot air heater according to the embodiment of the present invention configured as described above are as follows.

[0127] First, when current is supplied to the first and second motors (410) (221) by the control of the controller (800), the operating axes of the screw conveyor (220), the blower fan (400), and the exhaust fan (600) are driven simultaneously.

[0128] At this time, the pellets supplied from the screw conveyor (220) fall into the middle part of the combustion chamber (120) by the guidance of the flow plate (125).

[0129] In addition, as shown in FIG. 8, the rotational motion of the bevel gear (222) fixed to the motor shaft of the second motor (221) is converted into the linear reciprocating motion of the ash filter (123) forming the bottom of the combustion chamber (120) by the connecting rod (130).

[0130] In this way, the pellets that fall into the interior of the combustion chamber (120) through the flow plate (125) are evenly flattened by the interference of the rake (126), so the flame spreads widely and rises.

[0131] In this process, the thermoelectric element module (700) converts thermal energy transmitted through the stud (150) inside the combustion chamber (110) into electrical energy during the combustion of the pellet, stores it in the capacitor (710), and can supply current to the first and second motors (410) (221) under the control of the controller (800).

[0132] Meanwhile, the motor shaft of the first electric motor (410) is directly connected to the rotation shafts of the blower fan (400) and the exhaust fan (600), thereby optimizing the driving process into a single unit, which minimizes power consumption and allows for the simultaneous supply of outside air and forced discharge of exhaust gas.

[0133] That is, as shown in FIG. 12, outside air is drawn into the heat exchange chamber (310) by the operation of the blower fan (400) and flows upward, and at the same time, a strong wind is stably blown into the lower part of the combustion chamber (110), so the combustion speed is increased and the heat power is stronger, thereby maximizing the thermal efficiency and heat conduction efficiency.

[0134] In addition, as shown in FIGS. 11 and 13, the exhaust fan (600) draws exhaust gas from the combustion chamber (110) into the exhaust chamber (500) through the exhaust duct (510) and forcibly discharges it through the exhaust pipe (520), thereby reducing the length of the exhaust pipe (520) and preventing backflow of exhaust gas from the combustion chamber (110) and flashback of the flame and smoke generation due to changes in air pressure and temperature.

[0135] And as shown in FIG. 10, by pulling the user's lever (352), the scraper (350) can be moved back and forth several times along the length of the heat transfer tube (340) to scrape off fine particles of carbon powder such as soot, dust, and tar that stick to the surface of the heat transfer tube (340) and hinder heat transfer, thereby allowing the heat transfer tube (340) to be cleaned simply and easily.

[0136] In addition, as shown in FIG. 8, the ash filter (123) forming the bottom of the combustion chamber (120) is linked to the screw conveyor (220) by the operation of the bevel gear (222) and the connecting rod (130), so combustion residues such as ash, ash, and clinker can be automatically shaken and dropped down.

[0137] Therefore, it is possible to prevent combustion efficiency from decreasing as combustion residue accumulates unevenly in the combustion chamber (120).

[0138] Meanwhile, it is obvious to those skilled in the art that the present invention is not limited by the embodiments described above and the attached drawings, and that it can be modified and applied in various ways not exemplified within the scope of the technical concept of the present invention, as well as widely applied by substituting each component and changing to equivalent alternative embodiments.

[0139] Therefore, content related to modifying and applying the technical features of the present invention should be interpreted as being included within the technical concept and scope of the present invention.

[0140] The self-generating pellet hot air blower according to an embodiment of the present invention is an invention that can be utilized industrially because it converts thermal energy generated during the combustion process of pellets into electrical energy without external power input to minimize power consumption and uses it for its own power.

Claims

1. A combustion unit that generates combustion heat as pellets are burned in a combustion tube installed at the bottom of the combustion chamber; A pellet input unit installed adjacent to the combustion unit and supplying a certain amount of pellets to the combustion chamber; A heat exchanger installed adjacent to the combustion section and heat transfer surface, with the combustion heat generated in the combustion section being exchanged with the outside air flowing into the heat exchange chamber to produce heated air; A blower fan installed at the bottom of the heat exchange chamber and rotated by the rotational force generated by the first electric motor to draw outside air into the interior of the heat exchange chamber through the intake port of the heat exchange section and discharge heated air inside the heat exchange chamber through the discharge port of the heat exchange section; An exhaust chamber connected to one side of the combustion chamber by an exhaust duct to allow air to pass through, and collecting exhaust gas coming from the combustion chamber and discharging it to the outside through an exhaust pipe; and An exhaust fan embedded in the exhaust chamber and rotating simultaneously with the blower fan by the rotational force generated by the first electric motor to draw exhaust gas from the combustion chamber into the exhaust chamber by suction force and forcibly discharge it; A self-generating pellet hot air heater including 2. In Paragraph 1, The above heat exchanger is, A plurality of heat transfer tubes formed in a vertically elongated hexagonal cross-section and installed at regular intervals in the horizontal direction on the upper side of the combustion section, and heat exchange the combustion heat generated in the combustion section with the outside air flowing into the internal space by the blower fan to produce heated air; and A scraper having a plurality of clearance holes formed on the inside in a shape corresponding to the outer shape of the heat transfer tube, which slides along the longitudinal direction of the heat transfer tube by pulling a lever to scrape off and remove fine particles of carbon powder adhering to the surface of the heat transfer tube; A self-generating pellet hot air heater including 3. In Paragraph 1, The above pellet input section is, A pellet container for storing a certain amount of pellets; A screw conveyor mounted at the bottom of the pellet container and automatically transporting a certain amount of pellets stored in the pellet container by the rotational force of the second electric motor to supply them to the combustion container; and A bevel gear connected to the motor shaft of the second electric motor and rotating simultaneously with the screw conveyor; Includes, The above combustion unit is, A great bearer installed at the bottom of the combustion chamber and supporting the combustion tank; A guide groove formed in the lower part of the combustion chamber; An ash filter installed to support the pellets inside the combustion chamber and capable of sliding along the guide groove, with a plurality of ventilation holes arranged on the inside; A connecting rod having both ends connected to the bevel gear and the rag holder, respectively, by pin joints so that the rotational motion of the bevel gear is converted into the linear reciprocating motion of the rag holder; A self-generating pellet hot air heater including 4. In Paragraph 3, The above combustion unit is, A flow plate mounted on the inner upper part of the combustion chamber to guide pellets supplied from the screw conveyor to fall into the middle part of the combustion chamber; A rake mounted in the lower central part of the combustion chamber and which evenly flattens the pellets dropped through the flow plate during the linear reciprocating motion of the ash filter, causing the flame to spread widely and rise; and An ash catcher installed at the lower part of the combustion chamber and receiving ash falling from the combustion container; A self-generating pellet air heater that further includes 5. In Paragraph 3, A stud that is attached in a series at regular intervals on the vertical heat transfer surface between the heat exchanger and the combustion chamber, and increases the heat absorption rate by increasing the heat transfer surface area; A thermoelectric element module attached to a vertical heat transfer surface within the heat exchange chamber between the combustion unit and the above-mentioned combustion unit, and converting thermal energy transferred through the stud into electrical energy; A capacitor that stores electrical energy transmitted from the thermoelectric element module and supplies current to the first and second motors; A heat sink attached to the surface of the thermoelectric module and drawing heat from the surface of the thermoelectric module and releasing it into the air flowing into the internal space; A temperature sensor attached to the heat sink to detect temperature changes and transmit an electrical signal; and A controller that controls the operation of the second motor and the thermoelectric element module based on temperature information transmitted from the temperature sensor, and controls the current supplied from the capacitor to the first and second motors; A self-generating pellet air heater that further includes 6. In Paragraph 1, An intake duct connecting the lower part of the combustion chamber and the lower part of the heat exchange chamber to allow air to pass through, so as to forcibly blow a portion of the outside air introduced into the interior of the heat exchange chamber by the blower fan into the lower part of the combustion chamber within the combustion chamber; A self-generating pellet air heater that further includes

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