CN110440438A - Air heater - Google Patents

Air heater Download PDF

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Publication number
CN110440438A
CN110440438A CN201810414529.6A CN201810414529A CN110440438A CN 110440438 A CN110440438 A CN 110440438A CN 201810414529 A CN201810414529 A CN 201810414529A CN 110440438 A CN110440438 A CN 110440438A
Authority
CN
China
Prior art keywords
liquid fuel
combustion chamber
temperature
control valve
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810414529.6A
Other languages
Chinese (zh)
Inventor
R·J·马里诺
B·M·维利
尹国鸿
柴文杰
M·T·亚伦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Techtronic Cordless GP
Original Assignee
TTI Macao Commercial Offshore Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TTI Macao Commercial Offshore Ltd filed Critical TTI Macao Commercial Offshore Ltd
Priority to CN201810414529.6A priority Critical patent/CN110440438A/en
Priority to US16/401,282 priority patent/US20190338950A1/en
Priority to CA3042196A priority patent/CA3042196A1/en
Priority to EP19172598.5A priority patent/EP3598021A3/en
Publication of CN110440438A publication Critical patent/CN110440438A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/28—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid in association with a gaseous fuel source, e.g. acetylene generator, or a container for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • F23D14/36—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air in which the compressor and burner form a single unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/38—Torches, e.g. for brazing or heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/465—Details, e.g. noise reduction means for torches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L5/00—Blast-producing apparatus before the fire
    • F23L5/02—Arrangements of fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/08—Regulating air supply or draught by power-assisted systems
    • F23N3/087—Regulating air supply or draught by power-assisted systems using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/025—Air heaters with forced circulation using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0488—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0052—Details for air heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1877—Arrangement or mounting of combustion heating means, e.g. grates or burners
    • F24H9/1881—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
    • F24H9/2085—Arrangement or mounting of control or safety devices for air heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2221/00—Pretreatment or prehandling
    • F23N2221/04—Preheating liquid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/16—Measuring temperature burner temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/10—Sequential burner running
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/14—Fuel valves electromagnetically operated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/02—Space-heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0423—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between hand-held air guns

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Catching Or Destruction (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)

Abstract

The invention discloses a kind of liquid fuel air heaters, comprising: shell, the grip portions for limiting motor holding part and extending from the motor holding part.Electric motor is located in the motor holding part.Combustion chamber, the combustion chamber are at least partially situated in the motor holding part.The fan driven by the motor, when actuated, for generating the axial flow for passing through the combustion chamber.Battery pack includes the multiple battery units arranged and be connected to each other with serial or parallel connection, and the battery pack is removably coupled to the grip portions of the shell to power to the motor.

Description

Air heater
Technical field
The present invention relates to a kind of air heaters, more particularly, to a kind of liquid fuel air heater.
Background technique
Air heater forms the air stream of heating using liquid fuel combustion can be discharged into environment.Liquid fuel can To be provided from the liquid fuel container on air heater.
Summary of the invention
One aspect of the present invention provides a kind of liquid fuel air heater comprising: shell limits motor holding Part and the grip portions extended from motor holding part；Electric motor is located in motor holding part；Combustion chamber, at least It is positioned partially in motor holding part；The fan driven by motor, when actuated, for generating the axis by combustion chamber To air-flow；And battery pack, including the multiple battery units being connected to each other with serial or parallel connection arrangement, the battery pack is removable It is connected to the grip portions of the shell with unloading to power to motor.
Another aspect provides a kind of liquid fuel air heaters comprising: shell defines that motor holds Receive part；Electric motor is located in motor holding part；Combustion chamber is at least partially situated in motor holding part；By motor The fan of driving, when fan is activated, for generating the axial flow by combustion chamber；Liquid fuel container, the liquid Fuel container is at least partially situated in the shell, for providing liquid fuel to the combustion chamber；And heating blanket, with institute Liquid fuel container thermo-contact is stated, and at least partly around the liquid fuel container.Wherein, heating blanket is being activated When, increase the temperature of liquid fuel container.
Another aspect of the present invention additionally provides a kind of method of operating liquid fuel-air heater, the method packet It includes: in the case of the first, actuator being moved to the second position from first position；The second position is reached in response to actuator and is opened Dynamic first timer；After the first timer terminates, detection actuator is in first position or the second position；It is detecting After being in the second position to actuator, control valve is opened to draw liquid fuel slave load liquid fuel container towards combustion chamber It leads；By the igniter in conduct current combustion chamber to light the fuel in combustion chamber；And starter motor is with driving fan, to produce The raw axial flow by combustion chamber, the axial flow are heated by burning fuel and are discharged from combustion chamber.
By considering features as discussed above, other features of the invention and aspect be will become obvious.
Detailed description of the invention
Fig. 1 is the perspective view of liquid fuel air heater；
Fig. 2 is the plan view of the liquid fuel air heater of Fig. 1, wherein removes multiple portions；
Fig. 3 is the schematic diagram of the liquid fuel air heater of Fig. 1；
Fig. 4 is the flow chart for showing the method for liquid fuel air heater of operation diagram 1.
Before explaining in detail any embodiment of the invention, it should be appreciated that application of the invention be not limited to Described in lower description or the details of the configuration of following component shown in the accompanying drawings and arrangement.The present invention can have other realities It applies mode and can be practiced or carried out in various ways.Also, it is to be understood that wording used herein and term be for The purpose of description, and should not be considered limiting.
Specific embodiment
Fig. 1-3 shows the air heater 10 of embodiment according to the present invention.Air heater 10 include shell 14, Liquid fuel container 16, combustion chamber 18 and for by thermal current vector heat outlet 20.Shell 14 limits motor holding Part 22, the motor holding part 22 accommodate combustion chamber 18 and motor 24 and export 20 phases with heat in combustion chamber 18 with drive arrangement Pair side on fan 26, and when air heater 10 when in use can by operator grasp grip portions 30, hold Part 30 extends from motor holding part 22.In the embodiment shown, liquid fuel container 16 is stored including liquefied butane Device, but in other embodiments, liquid fuel container may include other flammable liquids.
Battery pack 32 is removably coupled to grip portions 30, with to the motor 24 and air heater 10 for needing electric power Other assemblies provide electric power.In the illustrated embodiment, battery pack 32 is 18V battery pack, but can optionally include many Any one of different nominal voltages (for example, 12V, 24V etc.), and can be configured as with a variety of different chemical substances Any one of (such as lithium ion, ni-Cd etc.).Battery pack 32 includes arranging the multiple electricity being connected to each other with serial or parallel connection Pool unit.
In the illustrated embodiment, grip portion 30 is pistol type gripping handle, but is held in other embodiments Part 30 can have other shapes and direction.Air heater 10 includes actuator, such as trigger 34, and actuator, which is located at, to be held It holds in part 30, and the first extended position is biased to by torque spring 38 (Fig. 2).When trigger 34 overcomes torque spring 38 When bias force is pressed into the second depressed position, trigger 34 is configured as actuating switch 40, and switch 40 is heated to control air The controller of the operation of device 10 provides input.In the illustrated embodiment of air heater 10 as shown in Figure 3, controller quilt It is configured to the micro controller unit (" MCU ") 42 being arranged on printed circuit-board assembly 44.As further explained, Air heater 10 further includes LED 46, consistent from different operating stages, to pass through different luminescent color or flash pattern Instruction is provided to operator.
As shown in Fig. 2, liquid fuel container 16 has gas bleeder valve 48, gas bleeder valve 48 enters via pipeline 50 and metering valve 54 Mouth is in fluid communication.Metering valve 54 adjusting knob 58 (Fig. 1) can be used to adjust to control the stream for the liquid fuel for leaving metering valve 54 Dynamic rate.In the illustrated embodiment, metering valve 54 is needle valve, but in other embodiments, other valves can be used Type.In this way, the flow rate of the liquid fuel of combustion chamber 18 is finally transported to by adjusting, it is adjustable to be discharged from outlet 20 Thermal current temperature.
With continued reference to Fig. 2, as shown in Fig. 2, air heater 10 further includes control valve 62, which has via pipe The entrance of the communication of road 60 and metering valve 54.The outlet of control valve 62 is in fluid communication via pipeline and combustion chamber 18. In the illustrated embodiment of air heater 10, control valve 62 is the electromagnetic actuating valve 62 being electrically connected with MCU 42.MCU 42 Valve 62 can be switched over again between opening state and closed state, allow liquid fuel to fire from liquid in an open state Material container 16 flows to combustion chamber 18, and liquid fuel is prevented to be discharged into combustion chamber 18 in the closed state.Valve 62 is biased to the closed shape State, so that valve 62 will remain turned-off, and prevent the liquid from container 16 in the case where the electricity input not from MCU 42 Fuel is discharged into combustion chamber 18.
As shown in figure 3, air heater 10 includes being at least partially disposed at the point being electrically connected in combustion chamber 18 and with MCU42 Firearm 66.Combustion chamber 18 includes hole 68, is lighted a fire in the liquid fuel access aperture 68 from pipeline 64 with passing through igniter 66.Thermoelectricity Even 70 are located at combustion chamber 18 near or within, and are also electrically connected via amplifier 74 with MCU 42.
As shown in figure 3, temperature sensor 78 is arranged in liquid fuel container 16 nearby to monitor liquid fuel container 16 Temperature.Heating blanket 82 is wrapped in around liquid fuel container 16 and thermally contacts with liquid fuel container 16 (see also Fig. 2).Add Hot blanket 82 is also electrically connected with MCU 42.As discussed in further detail below, it when heating blanket 82 is started by MCU 42, improves The temperature of liquid fuel container 16, and therefore, the pressure of the compressed gas in container 16 is by liquid fuel from being wherein discharged.
Fig. 4 is the flow chart for showing the method for operation air heater 10.In operation, as shown in step 86, in user Before pressing trigger 34 and activating switch 40, control valve 62 is initially at its closed state, prevents liquid fuel from container 16 Flow to combustion chamber 18.In step 86, motor 24 is also deactivated, so that fan 26 is inoperative, and does not have current direction igniter 66. However, LED 46 indicates air heater 10 " preparing stand-by " to operator when as long as motor 24 is powered by battery 32.In step Rapid 90, when operator overcome torque spring 38 biasing press trigger 34 the first in the case of, switch 40 be closed, thus to MCU 42 provides electric signal (that is, voltage input).Once detecting that the triggering activates signal, MCU 42 starts the first timer, First timer will run the first predetermined amount of time, as shown at step 94.Triggering actuating signal in response to this, LED 46 is to operation Member's instruction air heater 10 " preheating ".
Then, in step 98, MCU checks whether trigger 34 is still pressed in the first timer expiration to determine, and And switch 40 is still closed.If trigger 34 is not still pressed, control valve 62 is remained turned-off, and motor 24 keeps deactivating, And there is no current direction igniter 66.However, if trigger 34 is still pressed, as shown at step 1 02, MCU 42 with Control valve 62 is powered so that liquid fuel is inducted into combustion chamber 18, and directs current to igniter (within the limited time) 66, duplicate spark is generated, to light the liquid fuel of discharge at the hole 68 in combustion chamber 18.This ensures of short duration unexpected or nothing Meaning will not start the operation of air heater 10 when pressing trigger 34.
In some embodiments, liquid fuel is preheated before the burning at hole 68.Specifically, access aperture 68 it Before, the flame that liquid fuel is burned in room 18 is heated to threshold temperature, and liquid fuel is vaporized into gas combustion at such a temperature Material state.Gaseous fuel is subsequently into hole 68 for the burning of igniter 66.Therefore, in these embodiments, liquid fuel quilt Prevent access aperture 68.However, fuel is only with gaseous state access aperture 68.
While MCU42 guidance electric current passes through igniter 66 or in the near future, the also starter motor 24 of MCU 42 is to rotate Fan 26, as shown at step 1 02.Fan 26 generates the axial flow for passing through combustion chamber 18, the burned liquid combustion of axial flow Material heating.Then, the air-flow of heating is discharged from heat outlet 20.In response to the opening of control valve 62, to igniter 66 electric current with And the driving of motor 24 is with driving fan 26, LED 46 indicates that air heater 10 is in " on " to operator, therefore to behaviour Work person sends signal notification triggers device 34 and can be released.Then, as shown in step 106, operator can discharge trigger 34, Control valve 62 stays open simultaneously and motor 24 continues driving fan 26.Therefore, operator's liquid fuel within continues to flow to combustion While burning room 18 to continue heating operation, trigger 34 can be discharged, without persistently pressing trigger 34.
With continued reference to Fig. 4, during the operation of air heater 10, thermocouple 70 is produced using thermoelectricity or " Seebeck " effect The raw voltage with the temperature proportional in combustion chamber 18.Amplifier 74 amplifies the voltage exported by thermocouple 70, and after amplification Voltage be supplied to MCU 42 as the voltage input with the temperature proportional in combustion chamber 18.Since thermocouple 70 adds in air It is in environment temperature before the hot operation of device 10, after the first timer terminates, as shown at step 110, the starting of MCU 42 second Timer.Second timer will run the second predetermined amount of time, while control valve 62 will remain powered on (and therefore in its dozen Open state), and the temperature detected regardless of thermocouple 70, and no matter whether trigger 34 is maintained at its depressed position Or be released, motor 24 will remain actuated so that fan 26 rotates.As shown at step 114, thermocouple continues generation and combustion chamber The voltage of temperature proportional in 18, thus the temperature of " detection " combustion chamber 18.
As shown in step 118, at the end of the second timer, MCU determines whether the temperature in combustion chamber 18 is greater than or waits In the threshold temperature detected by thermocouple 70.If the temperature in combustion chamber 18 is greater than or equal to threshold temperature, MCU 42 will keep control valve 62 to be in its opening state and continue drive motor 24 and fan 26, as shown at 122.
If temperature at the end of the second timer in combustion chamber 18 does not reach threshold temperature, MCU 42 will make to control Valve 62 processed powers off (it is thus switched to closed state from opening state) and deactivates motor 24, as represented by step 126.Cause This, if igniter 66 cannot light liquid fuel after 34 first time of trigger is pressed, then control valve 62 will close simultaneously Stop liquid fuel flows to combustion chamber 18.At the end of second timer, threshold temperature is not up in response to temperature, and LED 46 is to behaviour Work person indicates loss of ignition, thus must be in step 90 weight to the start-up course that operator sends signal notice air heater 10 New starting.
As described above, if stayed open in step 122 control valve 62 and motor 24 remains actuated, in step 130, Via thermocouple 70 and amplifier 74, the temperature of combustion chamber 18 is continued to test.As depicted at step 134, MCU 42 is continuously determined Whether the temperature in the combustion chamber that step 130 detects 18 is greater than or equal to threshold temperature.If the temperature in combustion chamber 18 is big In or be equal to threshold temperature, then step 130 is simply returned to by the process that MCU 42 is run, as long as and combustion chamber 18 temperature Degree is equal to or higher than threshold temperature, which just continues to recycle between step 130 and 134,.However, if in combustion chamber 18 Temperature be reduced to as determined by step 134 after (consistent with fray-out of flame) during the continuous operation of air heater 10 Threshold temperature will be hereinafter, as shown in step 138, MCU 42 will be such that the power-off of control valve 62 (closes so that it is switched to from opening state Conjunction state) and starting third timer while motor 24 continues driving fan 26,.In response to fray-out of flame, LED 46 to Operator's instruction is flame-out to be had occurred and that.
When third timer is currently running, motor 24 continues driving fan 26, during this period, LED during " cooling " Indicate that air heater 10 is undergoing " cooling " to operator.As shown in step 142, at the end of third timer, horse It is deactivated up to 24, and fan 26 is out of service.In some embodiments, third timer is 30 seconds, but in other embodiment party In formula, third timer is longer or shorter than 30 seconds.
Alternatively, as shown in step 146, operator can press trigger 34 only in the latter case to activate again Switch 40 promotes MCU 42 to close control valve 62 and starts third timer while motor 24 continues driving fan 26, with For " cooling " process, as shown in step 138.
During operation, as the liquid fuel in liquid fuel container 16 is used up, liquid-fuel tank cools off and liquid Pressure decline in fuel container 16, to influence and (reduce) flow velocity for the liquid fuel being discharged into combustion chamber 18.Therefore, During the operation of air heater 10, temperature sensor 78 continuously monitors the temperature of liquid fuel container 16 (Fig. 3).If liquid The temperature of fluid fuel container 16 drops to threshold temperature hereinafter, then temperature sensor 78 is to the offer of MCU 42 electric signal (for example, electricity Pressure input), activate heating blanket 82 then being promoted liquid fuel container 16 to predetermined temperature and/or by liquid fuel container 16 are maintained at predetermined temperature, such as 35 degrees Celsius.Therefore, heating blanket 82 prevent the temperature of liquid fuel container 16 from dropping to so that Insufficient pressure in liquid fuel container 16 is to provide the liquid fuel of constant flow rate from container 16.
Various features of the invention are elaborated in the following claims.

Claims (28)

1. a kind of liquid fuel air heater, comprising:
Shell, the grip portions for limiting motor holding part and extending from the motor holding part；
Electric motor is located in the motor holding part；
Combustion chamber, the combustion chamber are at least partially situated in the motor holding part；
The fan driven by the motor, when actuated, for generating the axial flow for passing through the combustion chamber；And
Battery pack comprising the multiple battery units being connected to each other with serial or parallel connection arrangement, the battery pack is removably The grip portions of the shell are connected to power to the motor.
2. liquid fuel air heater according to claim 1, wherein further including for providing liquid to the combustion chamber The liquid fuel container of fluid fuel.
3. liquid fuel air heater according to claim 2, wherein further include control valve, alternately to allow or Prevent liquid fuel from flowing to the combustion chamber from the liquid fuel container.
4. liquid fuel air heater according to claim 3, wherein the control valve is electromagnetic actuating valve.
5. liquid fuel air heater according to claim 3, wherein further including being configured to light in the combustion chamber Liquid fuel igniter.
6. liquid fuel air heater according to claim 5, wherein further include actuator, the actuator can be It is moved between first position and the second position, in the first position, the motor is closed and the control valve is closed, institute It states actuator and is biased to the first position, and wherein, when the actuator continues predetermined time period, institute in the second position Control valve opening is stated, the igniter generates spark to light the liquid fuel in the combustion chamber, and the motor is caused It is dynamic.
7. liquid fuel air heater according to claim 6, wherein after control valve opening, if institute The temperature for stating combustion chamber continues the second predetermined amount of time below threshold temperature, then the control valve is closed.
8. liquid fuel air heater according to claim 3, wherein after control valve opening, if institute The temperature for stating combustion chamber reaches predetermined time period lower than threshold temperature, then the control valve is closed.
9. liquid fuel air heater according to claim 8, wherein after control valve opening, if institute The temperature for stating combustion chamber is greater than or equal to the threshold temperature up to predetermined time period, then the control valve stays open.
10. liquid fuel air heater according to claim 9, wherein further including thermocouple, the thermocouple is matched It is set to the voltage generated with the temperature proportional of the combustion chamber, and the voltage is fed as input to controller, wherein After control valve opening, if the temperature of the combustion chamber is greater than or equal to the threshold value temperature within a predetermined period of time Degree, then the controller stays open the control valve in response to receiving the input.
11. liquid fuel air heater according to claim 3, wherein further including being connect with the liquid fuel container heat It touches and at least partly around the heating blanket of the liquid fuel container, wherein described in the heating blanket increases when being activated The temperature of liquid fuel container.
12. liquid fuel air heater according to claim 11, wherein at a temperature of the liquid fuel container When dropping to threshold temperature or less, the heating blanket is activated.
13. a kind of liquid fuel air heater comprising:
Shell, which defines motor holding parts；
Electric motor is located in the motor holding part；
Combustion chamber is at least partially situated in the motor holding part；
The fan driven by the motor, when the fan is activated, for generating the axial flow by combustion chamber；
Liquid fuel container, the liquid fuel container are at least partially situated in the shell, for mentioning to the combustion chamber For liquid fuel；And
Heating blanket is thermally contacted with the liquid fuel container, and at least partly around the liquid fuel container,
Wherein, the heating blanket increases the temperature of the liquid fuel container when being activated.
14. liquid fuel air heater according to claim 13, wherein when the temperature of the liquid fuel container is low When threshold temperature, the heating blanket is activated.
15. liquid fuel air heater according to claim 13, wherein the shell is limited from the motor holding The grip portions that part extends.
16. liquid fuel air heater according to claim 15, wherein further including battery pack comprising with series connection or The multiple battery units for being arranged in parallel and being connected to each other, the battery pack are removably coupled to the grip part of the shell Divide to power to the motor.
17. liquid fuel air heater according to claim 13, wherein further including being configured to light the combustion chamber In liquid fuel igniter, and for alternately allowing or the liquid fuel being prevented to flow from the liquid fuel container To the control valve of the combustion chamber.
18. liquid fuel air heater according to claim 17, wherein further including actuator, the actuator can It moves between the first position and the second position, in the first position, the motor is closed and the control valve is closed, The actuator is biased to the first position, and wherein, when the actuator the second position continue first it is scheduled when Between section, the control valve opens, and the igniter generates spark to light the liquid fuel in the combustion chamber, and the horse Up to being activated.
19. liquid fuel air heater according to claim 18, wherein after control valve opening, if The temperature of the combustion chamber continues the second predetermined amount of time below threshold temperature, then the control valve is closed；In the control After valve is opened, if the temperature of the combustion chamber is greater than or equal to the threshold temperature and reaches second predetermined time period, Then the control valve stays open.
20. liquid fuel air heater according to claim 19, wherein further including thermocouple, the thermocouple is matched It is set to the voltage generated with the temperature proportional of the combustion chamber, and the voltage is fed as input to controller, wherein After control valve opening, if the temperature of the combustion chamber is greater than or equal to the threshold value in the predetermined amount of time Temperature, then the controller stays open the control valve in response to receiving the input.
21. liquid fuel air heater according to claim 17, wherein after control valve opening, if The temperature of the combustion chamber continues predetermined time period below threshold temperature, then the control valve is closed, and in the control After valve processed is opened, if the temperature of the combustion chamber is greater than or equal to the threshold temperature and reaches the predetermined time period, The control valve stays open.
22. a kind of method of operating liquid fuel-air heater, which comprises
In the case of the first, actuator is moved to the second position from first position；
The second position is reached in response to the actuator and starts the first timer；
After first timer terminates, detecting the actuator is in the first position or the second It sets；
After detecting that the actuator is in the second position, control valve is opened to fire liquid fuel slave carrier fluid body Material container is guided towards combustion chamber；
Igniter in combustion chamber described in conduct current is lighted to the fuel in the combustion chamber；And
Starter motor is with driving fan, and to generate the axial flow for passing through the combustion chamber, the axial flow is as described in burning Fuel heating is simultaneously discharged from the combustion chamber.
23. the method according to claim 11, wherein further include:
Start the second timer；
After second timer terminates, whether the temperature for detecting the combustion chamber is less than threshold temperature；
In the temperature for detecting the combustion chamber lower than after the threshold temperature, the control valve is closed；And
Deactivate the motor.
24. the method according to claim 11, wherein further include:
Start the second timer；
After second timer terminates, whether the temperature for detecting the combustion chamber is greater than or equal to threshold temperature；
After the temperature for detecting the combustion chamber is greater than or equal to the threshold temperature, maintains the control valve to be in and open State；And
Keep the starting of the motor.
25. the method according to claim 11, wherein further include:
After maintaining the control valve in the open state and maintaining the actuating of the motor, the temperature of the combustion chamber is detected Whether the threshold temperature is greater than or equal to；
In the temperature for detecting the combustion chamber lower than after the threshold temperature, closes the control valve and start third timing Device；And
After the third timer, the motor is deactivated.
26. the method according to claim 11, wherein further include:
After maintaining the control valve in the open state and maintaining the actuating of the motor, the temperature of the combustion chamber is detected Whether the threshold temperature is greater than or equal to；
After the temperature for detecting the combustion chamber is more than or equal to the threshold temperature, maintains the control valve to be in and beat Open state；And
Keep the starting of the motor.
27. the method according to claim 11, wherein further include:
After starting the motor, discharges the actuator and the actuator is allowed to be moved to described the from the second position One position；
After discharging the actuator, maintain the control valve in the open state；And
Keep the starting of the motor.
28. the method according to claim 11, wherein further include:
In the latter case, the actuator is moved to the second position from the first position；
Detecting the actuator is in the second position；
It detects that the actuator is in after the second position, closes the control valve；And
Deactivate the motor.
CN201810414529.6A 2018-05-03 2018-05-03 Air heater Pending CN110440438A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201810414529.6A CN110440438A (en) 2018-05-03 2018-05-03 Air heater
US16/401,282 US20190338950A1 (en) 2018-05-03 2019-05-02 Air heater
CA3042196A CA3042196A1 (en) 2018-05-03 2019-05-03 Air heater
EP19172598.5A EP3598021A3 (en) 2018-05-03 2019-05-03 Liquid fuel air heater

Applications Claiming Priority (1)

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CN201810414529.6A CN110440438A (en) 2018-05-03 2018-05-03 Air heater

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EP3598021A3 (en) 2020-04-08
US20190338950A1 (en) 2019-11-07
CA3042196A1 (en) 2019-11-03

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