JP2018084341A - Warm air heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a warm air heater suppressed in temperature rise inside a body casing and excellent in safety.SOLUTION: A warm air heater includes, in a body casing 1, a combustion chamber main body 12 which covers the flame of a burner 8 and exhausts flue gas upward, and a combustion chamber heat insulating plate 13 provided so as to form a warm air passage 14 which mixes the flue gas with air from an air fan 2 and guides to an air outlet 5 between the combustion chamber main body 12 and itself. The warm air heater is also provided with an exhaustion hole 15 which exhausts air between the body casing 1 and the combustion chamber heat insulating plate 13 on a front face side of the body casing 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hot air heater used for heating by mixing combustion exhaust gas generated by combustion of fuel and room air.

  Conventionally, a warm air heater generally has a built-in air blow box that connects a hot air intake and a warm air outlet as in Patent Document 1, and the combustion exhaust gas discharged from a combustion cylinder. And the air for blowing air from the convection fan are mixed to form hot air passages that lead to the hot air outlets as hot air.

JP 2006-84124 A

  In such a warm air heater, as the operation time elapses, the outer body that forms the warm air heater main body by radiant heat from the flame that burns inside the combustion cylinder and heat transfer from the warm air that passes through the blower box The temperature of the air staying in the inside rises. However, since the interior of the exterior body is partitioned into a hot air passage and other spaces by a blower box, the air sent from the convection fan hardly flows into a space other than the hot air passage, and other than the hot air passage. Because there are few places to get out of the space, the hot air tends to accumulate in this space.

  When the space other than the hot air passage becomes hot, electronic parts and resin parts arranged inside the hot air heater may be thermally damaged, which may impair the safety of the product. Although it is conceivable to employ a component having a high heat-resistant temperature as a means for suppressing such thermal damage, the component cost becomes high.

  This invention is for solving the said subject, and it aims at providing the warm air heater which suppressed the temperature rise inside a main body case, and was excellent in safety | security.

  The present invention includes a main body case, an air outlet provided on the front surface of the main body case, a blower that introduces outside air into the main body case, a burner that generates combustion exhaust gas by combustion, and combustion that covers the flame of the burner Combustion chamber provided so as to form a combustion chamber main body that discharges exhaust gas upward, and a hot air passage that mixes the combustion exhaust gas and air from the blower and guides it to the outlet. A warm air heater comprising a heat shield plate, wherein the exhaust hole for discharging air between the main body case and the combustion chamber heat shield plate is provided on the front side of the main body case. It relates to wind heaters.

  The blower is attached to an intake opening provided on a back surface of the main body case, and the combustion chamber heat shield is disposed so as to cover the intake opening, and a side surface from the blower is provided. An outflow port for allowing a part of the air to flow out to the outside of the combustion chamber heat shield plate is provided, and the air flowing out of the outflow port flows to the exhaust hole through the outside of the combustion chamber heat shield plate. It is related with the warm air heater of Claim 1.

  The main body case is provided with a fuel container housing portion for housing a container for storing fuel, and the hot air heater is operated between the front surface of the main body case and the fuel container housing portion. The control part which controls is arrange | positioned, The part of the air which flowed out from the said outflow port flows in the circumference | surroundings of the said control part, It concerns on the warm air heater of Claim 2 characterized by the above-mentioned.

  Further, the front surface of the main body case has a blowout opening portion to which the blowout port is attached, and the exhaust hole is provided on a contact surface between the blowout port and the blowout opening portion. It concerns on the warm air heater of any one of claim | item 1 -3.

  Further, the outlet and the outlet opening are substantially square, and the outlet and the outlet opening are in contact with four sides, and the exhaust hole is provided only on the contact surface of the upper side. The present invention relates to a hot air heater according to claim 4.

  By setting it as the above-mentioned structure, the temperature rise inside a main body case can be suppressed and the warm air heater excellent in safety can be provided.

It is a longitudinal cross-sectional block diagram of the warm air heater of this invention. It is a front view in the state where the main body case front side of the warm air heater of the present invention was removed. It is an external appearance perspective view of the blower outlet of this invention. It is an external appearance perspective view of the combustion chamber heat shield of the present invention.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode of the present invention, which is considered preferable, will be briefly described by showing the effects of the present invention.

  In the hot air heater of the present invention, an exhaust hole for discharging air between the main body case and the combustion chamber heat shield is provided on the front side of the main body case. That is, since the air inside the main body case that has become high temperature due to heat from the flame is released from the front side of the main body case to the outside, the high temperature air can be prevented from accumulating inside the main body case. Further, by providing the exhaust hole, the space other than the hot air passage communicates with the outside of the main body case, the internal pressure decreases, and low temperature outside air easily flows, so that the temperature rise inside the main body case can be suppressed. Thereby, the thermal damage of the electronic component and resin component which are arrange | positioned inside a main body case can be avoided. In addition, since the exhaust hole is provided on the front side of the main body case, even if a liquid such as water falls on the upper side of the main body case, it is difficult to enter the exhaust hole and the liquid can be prevented from flowing into the main body case.

  In addition, an outlet is provided on the side of the combustion chamber heat shield, and a part of the air taken in from the blower is allowed to flow outward from the outlet and flows outside the combustion chamber heat shield to the exhaust hole. Therefore, the high-temperature air staying between the main body case and the combustion chamber heat shield is pushed out and discharged from the exhaust hole to the outside of the main body case. Thereby, the temperature inside a main body case can be restrained low.

  In addition, since a part of the air that has flowed from the outlet is also flown around the control unit, it is possible to prevent high-temperature air from being collected around the control unit that does not want to be placed in a high-temperature atmosphere. Thereby, the thermal damage of a control part can be avoided.

  In addition, because the exhaust holes are provided in the contact surface between the outlet and the outlet opening located near the combustion chamber heat shield, air that has become hot around the combustion chamber heat shield is efficiently discharged. Therefore, the temperature rise can be further suppressed.

  In addition, by providing an exhaust hole only on the upper side of the four sides where the blower outlet and the blowout opening abut, the air above the combustion chamber heat shield plate that is likely to reach the highest temperature is efficiently discharged at the shortest distance. be able to. Moreover, since the exhaust hole is opened upward, it is possible to prevent dust and the like from entering the main body case. Furthermore, since the exhaust hole is provided at a position that is difficult for the user to visually recognize, it is possible to prevent foreign matter from being inserted into the exhaust hole.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 and 2 are diagrams showing the internal configuration of the hot air heater. Reference numeral 1 denotes a main body case, which is composed of main body case front surface 1a, main body case side surface 1b including left and right side surfaces and back surface, top surface 1c, and bottom surface 1d. Reference numeral 2 denotes a blower that is attached to an intake opening 3 provided on the back surface of the main body case side surface 1 b and takes air into the main body case 1. A filter 4 that collects dust and the like is detachably provided in the intake opening 3. Reference numeral 5 denotes a blowout port that is attached to the blowout opening 6 provided on the front surface 1a of the main body case and blows warm air out of the main body case 1. In addition, what included the main body case front surface 1a, the blowing opening part 6 provided in this main body case front surface 1a, and the blower outlet 5 is called the main body case front side.

  7 is a vaporizer that heats and vaporizes the liquid fuel, 8 is a burner composed of a mixing tube 9 and a flame hole 10, and 11 is a burner box in which the burner 8 is housed. Further, 12 is a combustion chamber main body that covers the flame of the burner 8 and discharges the combustion exhaust gas upward, 13 is a combustion chamber heat shield disposed so as to cover the combustion chamber main body 12 and the intake opening 3, and 14 is a combustion chamber main body. 12 is a hot air passage formed between the combustion chamber heat shield plate 13 and the combustion exhaust gas and the air from the blower 2 to guide the air to the outlet 5 as hot air. An exhaust hole 15 is provided in the vicinity of the outlet of the hot air passage 14 to communicate the space between the main body case 1 and the combustion chamber heat shield plate 13 with the hot air passage 14.

  An operation unit 16 having a plurality of switches for performing operations such as operation / stop of the hot air heater and temperature setting is provided above the main body case front surface 1a, and an operation board (not shown) is provided inside. Yes.

  A temperature sensor 17 that detects the temperature inside the main body case 1 is attached to the upper surface of the combustion chamber heat shield plate 13. When the temperature sensor 17 detects that the temperature is equal to or higher than the predetermined temperature, it is determined that the inside of the main body case 1 is in an overheat abnormality state, and the operation is stopped. Here, the predetermined temperature is a temperature (temperature at which the temperature in the main body case 1 is determined to be abnormal) that would not be reached if the filter 4 is not clogged and the blower 2 is operating normally.

  Further, on the side of the combustion chamber heat shield plate 13, there is provided a fuel container housing portion 18 that partitions the inside of the main body case 1 in order to accommodate a cartridge tank (not shown) that stores kerosene. Since the space in which the fuel container housing portion 18 is disposed has a relatively low temperature even inside the main body case 1, it is suitable for disposing electronic components that do not want to be placed at high temperatures. For this reason, the control board 19 as a control part which controls operation | movement of a warm air heater is attached to the surface facing the main body case front surface 1a of the fuel container accommodating part 18. FIG.

  Next, a specific configuration of the exhaust hole 15 and its periphery will be described with reference to FIGS. FIG. 3 is a diagram illustrating the air outlet 5. The blower outlet 5 is a substantially quadrilateral component, and includes a plurality of blades 20 that guide the blowing direction of the warm air. Furthermore, it has the outer peripheral surface 21 formed by bend | folding the outer periphery 4 sides of the blower outlet 5 in the blowing direction of warm air.

  On the other hand, the air outlet 6 to which the air outlet 5 is attached is formed in the main body case front face 1a in a substantially square shape like the air outlet 5, and is formed by bending four sides of the opening in the inner direction of the main body case 1. The inner peripheral surface 22 is provided. And the outer peripheral surface 21 of the blower outlet 5 and the inner peripheral surface 22 of the blower opening part 6 contact | abut as a contact surface, respectively.

  The exhaust holes 15 are respectively provided on the outer peripheral surface 21 of the air outlet 5 and the inner peripheral surface 22 of the air outlet 6 that contacts the air outlet 5, and the main body case 1 and the combustion chamber heat shield plate through the exhaust holes 15. 13 communicates with the outside of the main body case 1.

  The exhaust hole 15 is formed on the outer peripheral surface 21 so as to connect a plurality of long holes in the longitudinal direction. Although not shown, a plurality of elongated holes corresponding to the exhaust holes 15 provided in the outer peripheral surface 21 are also formed on the inner peripheral surface 22 of the blowout opening 6 that contacts the outer peripheral surface 21. In the present embodiment, a plurality of long holes are provided as the exhaust holes 15. However, the present invention is not limited to this. For example, the exhaust hole 15 may be constituted by one large long hole. The blowout opening 6 may be provided with one large slot or notch that is opened so as to cover all of the plurality of slots.

  FIG. 4 is an external perspective view of the combustion chamber heat shield plate 13. In the direction of the main body case front surface 1 a of the combustion chamber heat shield plate 13, a heat shield plate front wall 13 a inclined from the upper surface of the combustion chamber heat shield plate 13 toward the outlet 5 is provided. In addition, on the heat shield plate side surface 13 b facing the fuel container housing portion 18 of the combustion chamber heat shield plate 13, an outlet 23 through which a part of the air taken in from the blower 2 flows out to the outside of the combustion chamber heat shield plate 13. Is provided. The outlet 23 is formed by cutting and raising a part of the heat shield plate side surface 13b of the combustion chamber heat shield plate 13 in the inner direction. The air sent from the blower 2 is changed in flow by the cut and raised surface, flows into the outlet 23, and flows out of the combustion chamber heat shield plate 13. In this embodiment, the outlet 23 is provided with a cut-and-raised surface. However, the present invention is not limited to this. For example, the outlet 23 is not provided with a cut-and-raised surface, and the part changes the air flow to another location. May be provided to flow into the outlet 23, or a component for turning may not be provided.

  Next, the operation | movement operation | movement of the warm air heater in the above-mentioned structure and the flow of the air inside the main body case 1 are demonstrated using FIGS. In addition, the black arrow shown in the figure is the flow of hot air containing combustion exhaust gas and the air heated to high temperature by radiation / heat transfer from the combustion chamber body 12, and the white arrow is the low temperature taken in from the blower 2. Air flow.

  First, when the operation is started, the liquid fuel is heated and vaporized by the vaporizer 7 to be vaporized gas, and is ejected from the nozzle into the mixing tube 9. When the vaporized gas is ejected, ambient air is drawn into the mixing tube 9 as primary air by the ejection force. The air introduced into the main body case 1 by driving the blower 2 is also pushed into the mixing tube 9 from the lower part of the burner box 11 as primary air, mixed with the above-mentioned vaporized gas to become a mixed gas, and an ignition device (not shown) Is started and combustion is started at the flame hole 10. Further, the air from the blower 2 flows into the combustion chamber body 12 and is supplied to the flame as secondary air for combustion.

  Then, as shown by the black arrow in FIG. 1, the combustion exhaust gas generated by the combustion is guided upward from an opening provided in the upper portion of the combustion chamber main body 12, and then the combustion chamber heat shield plate 13 and the front surface of the combustion chamber main body 12. The air is mixed with the air from the blower 2 while passing through the hot air passage 14 formed between them and becomes hot air, and is discharged into the room through the outlet 5.

  As the operating time of the hot air heater elapses, the air staying between the main body case 1 and the combustion chamber heat shield 13, particularly the air staying above the front wall 13 a of the heat shield, passes through the combustion chamber main body 12. The temperature rises to a high temperature due to the radiant heat of the burning flame or heat transfer from the warm air passing through the warm air passage 14. The hot air passes through the exhaust hole 15 and is discharged to the outside of the main body case 1 through the air outlet 5 so as to be pulled by the hot air flowing through the hot air passage 14.

  As described above, since the high-temperature air staying between the main body case 1 and the combustion chamber heat shield plate 13 is discharged from the exhaust hole 15 to the outside of the main body case 1, the high-temperature air may be accumulated inside the main body case 1. Absent. Further, the inside of the main body case 1 communicates with the outside, the internal pressure of the main body case 1 decreases, and low-temperature outside air easily flows from the gaps between the parts of the main body case 1. be able to. Thereby, it is possible to avoid a risk that the electronic parts and the resin parts constituting the operation unit 16, the temperature sensor 17, the control board 19, and the like disposed inside the main body case 1 are thermally damaged. In addition, since the exhaust hole 15 is provided in the blower outlet 5 and the blower opening part 6 which are the front side of the main body case, even if liquid such as water spills and falls on the top surface 1c of the main body case 1, The liquid is difficult to enter from the exhaust hole 15 and can be prevented from flowing into the main body case 1.

  Further, the air staying between the main body case 1 and the combustion chamber heat shield plate 13 is likely to become high temperature due to the radiant heat of the flame combusted in the combustion chamber main body 12 or heat transfer from the hot air passing through the hot air passage 14. However, since the exhaust holes 15 are formed in the contact surfaces of the blowout port 5 and the blowout opening 6 that are continuously arranged from the combustion chamber heat shield plate 13, the air that has become hot around the combustion chamber heat shield plate 13 is removed. It can be discharged efficiently, and the temperature rise can be effectively suppressed.

  Furthermore, the exhaust holes 15 are preferably provided only on the upper surface of the four sides of the outer peripheral surface 21 of the outlet 5 and the inner peripheral surface 22 of the outlet opening 6. With this structure, the air above the heat shield plate front wall 13a, which is likely to be the highest temperature, can be discharged to the outside of the main body case 1 at the shortest distance. Further, since the exhaust hole 15 is opened upward, it is possible to prevent dust and the like from entering the main body case 1. In addition, since the position where the exhaust hole 15 is provided is a position that is hidden from the user's eyes and is difficult to visually recognize, foreign matter can be prevented from being inserted into the exhaust hole 15.

  A part of the air from the blower 2 flows out of the combustion chamber heat shield plate 13 from the outlet 23 provided on the heat shield plate side surface 13b, as in the flow of the air 1 indicated by the white arrow in FIG. The outflowed air travels between the heat shield plate side surface 13 b and the fuel container housing portion 18 and flows upward of the combustion chamber heat shield plate 13. After that, when it flows between the main body case front face 1a and the combustion chamber heat shield plate 13, hot air staying above the heat shield plate front wall 13a is pushed out (discharged portion in FIG. 2) and discharged from the exhaust hole 15. Let

  In this way, a low-temperature air flow that flows from the outlet 23 to the outside of the combustion chamber heat shield plate 13 and exits to the exhaust hole 15 is formed between the main body case 1 and the combustion chamber heat shield plate 13. And since the discharge | emission of the high temperature air in which this flow of low temperature air stagnates is promoted, the temperature inside the main body case 1 can be kept low. Furthermore, even when the amount of air introduced from the blower 2 decreases due to clogging of the filter 4 and the temperature inside the main body case 1 suddenly rises and becomes overheated abnormally, the flow of air passing through the exhaust hole 15 Therefore, high-temperature air can be discharged outside the main body case 1. Thereby, thermal damage caused by clogging of the filter 4 can also be avoided.

  Further, as in the flow of air 2 indicated by the white arrow in FIG. 2, a part of the air flowing out from the outlet 23 is caused by the control board 19 disposed between the main body case front surface 1 a and the fuel container housing portion 18. Also flows into the surroundings. After flowing around the control board 19, it merges with the flow of the air 1 indicated by the white arrow in FIG. 2, flows upward of the heat shield plate front wall 13 a, and is discharged from the exhaust hole 15. When the amount of air introduced from the blower 2 is reduced due to clogging of the filter 4 or the like, the temperature of the space where the control board 19 is arranged may also rise. In addition, since air is allowed to flow, high temperature air can be discharged without accumulating around the control board 19 to suppress an increase in temperature, so that thermal damage to the control board 19 can be avoided.

DESCRIPTION OF SYMBOLS 1 Main body case 2 Blower 3 Intake opening part 5 Outlet 6 Outlet part 8 Burner 12 Combustion chamber body 13 Combustion chamber heat shield 14 Hot air passage 15 Exhaust hole 18 Fuel container accommodating part 19 Control part (control board)
21 Contact surface (outer peripheral surface)
22 Contact surface (inner peripheral surface)
23 Outlet

Claims (5)

  A main body case, an air outlet provided on the front surface of the main body case, a blower for taking outside air into the main body case, a burner for generating combustion exhaust gas by combustion, and covering the flame of the burner so that the combustion exhaust gas is directed upward A combustion chamber main body that discharges, and a combustion chamber heat shield plate that is provided so as to form a hot air passage between the combustion chamber main body and the combustion exhaust gas and air from the blower and that leads to the outlet. The warm air heater provided with the exhaust hole which discharges the air between the said main body case and the said combustion chamber thermal-insulation board was provided in the front side of the said main body case.   The blower is attached to an intake opening provided on a back surface of the main body case, and the combustion chamber heat shield is disposed so as to cover the intake opening, and a side surface of the air from the blower is provided. An outflow port for allowing a part to flow out to the outside of the combustion chamber heat shield plate is provided, and the air flowing out of the outflow port flows to the exhaust hole through the outside of the combustion chamber heat shield plate. The hot air heater according to claim 1.   Inside the main body case is provided a fuel container accommodating portion for accommodating a container for storing fuel, and controls the operation of the hot air heater between the front surface of the main body case and the fuel container accommodating portion. The hot air heater according to claim 2, wherein a control unit is arranged, and a part of the air that has flowed out of the outlet flows around the control unit.   The front surface of the main body case has a blowout opening to which the blowout opening is attached, and the exhaust hole is provided on a contact surface between the blowout opening and the blowout opening. The hot-air heater as described in any one of 1-3.   The blowout opening and the blowout opening are substantially square, and the blowout opening and the blowout opening have four sides in contact with each other, and the exhaust hole is provided only on the contact surface of the upper side. The hot air heater according to claim 4.

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