Portable warmer

Abstract

The utility model relates to a portable warmer. The portable warmer comprises a warmer body and a charging wire detachably connected with the warmer body. The warmer body comprises a shell, a heating pipe, a battery assembly and a power management assembly, and the heating pipe, the battery assembly and the power management assembly are all arranged in the shell. A heating opening is formed in the front side of the shell, and a charging interface is further formed in the shell; the heating tube is connected with the battery assembly, the battery assembly is connected with the charging interface through the power management assembly, and the power management assembly is used for converting alternating current into direct current and charging the battery assembly; one end of the charging wire is provided with a first plug matched with the charging interface, and the other end of the charging wire is provided with a second plug matched with commercial power; according to the portable warmer, the battery assembly is arranged in the warmer to supply power to the heating tube, and the battery assembly is charged through the power management assembly, so that the warmer can be carried for use, and the use environment of the warmer is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of heaters, in particular to a portable heater. Background Art

[0002] Electric heater is a common household appliance. It can convert electrical energy into thermal energy and provide thermal energy to users by raising the air temperature within the heat radiation range of the electric heater.

[0003] Currently, all heaters on the market use 220V AC as their power source. Due to the conditions required by the power source, the heaters are not suitable for mobile and portable use. Utility Model Content

[0004] Based on the above description, the utility model provides a portable heater, which can be carried and used by arranging a battery assembly in the heater to power the heating tube and charging the battery assembly through a power management assembly, thereby expanding the use environment of the heater.

[0005] The technical solution of the utility model to solve the above technical problems is as follows: a portable heater, comprising a heater body and a charging cable detachably connected to the heater body;

[0006] The heater body comprises a shell, a heating tube, a battery assembly and a power management assembly, wherein the heating tube, the battery assembly and the power management assembly are all arranged in the shell; a heating port is arranged on the front side of the shell, and a charging interface is also arranged on the shell; the heating tube is connected to the battery assembly, and the battery assembly is connected to the charging interface through the power management assembly, and the power management assembly is used to convert AC power into DC power and charge the battery assembly;

[0007] One end of the charging cable is provided with a first plug matching the charging interface, and the other end of the charging cable is provided with a second plug matching the mains.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, a reflective plate is provided in the shell, and the reflective plate divides the interior of the shell into a front cavity and a rear cavity; the heating tube is arranged in the front cavity, and the heating port is connected to the front cavity; the battery assembly and the power management assembly are both arranged in the rear cavity, and one end of the charging interface extends into the rear cavity.

[0010] Furthermore, heat dissipation holes are respectively arranged on the left and right sides of the shell, and the heat dissipation holes are connected to the rear cavity.

[0011] Furthermore, the power management component includes a rectifier circuit, a transformer circuit and a filter circuit connected in sequence; the input end of the rectifier circuit is used to input alternating current, and the output end of the filter circuit is used to output direct current;

[0012] The power management component further includes a feedback circuit, a PWM control circuit and a voltage regulation circuit; the input end of the feedback circuit is connected to the output end of the filter circuit, the input end of the PWM control circuit is connected to the output end of the feedback circuit, the output end of the PWM control circuit is connected to the voltage regulation circuit; the output end of the voltage regulation circuit is connected to the transformer circuit;

[0013] The feedback circuit is used to sample the voltage signal output by the filter circuit to generate a feedback current signal; the PWM control circuit is used to generate a PWM control signal according to the feedback current signal; the voltage stabilization regulation circuit is used to regulate the strength of energy storage and release of the transformer circuit according to the PWM control signal.

[0014] Further, the transformer circuit includes a transformer T1, a diode D7, a resistor R9 and an electrolytic capacitor EC4; the transformer has a primary winding L1, a first secondary winding L2 and a second secondary winding L3, and the first secondary winding L2 and the second secondary winding L3 are both reversely coupled to the primary winding L1;

[0015] The primary winding L1 is connected to the voltage stabilizing and regulating circuit;

[0016] The first end of the first secondary winding L2 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to one end of the resistor R9, the other end of the resistor R9 is connected to the anode of the electrolytic capacitor EC4, and the cathode of the electrolytic capacitor EC4 is grounded; the second end of the first secondary winding L2 is grounded;

[0017] A first end of the second secondary winding L3 is connected to the filter circuit; a second end of the second secondary winding L3 is grounded.

[0018] Furthermore, the voltage stabilizing and regulating circuit includes a resistor R12, a capacitor C2, a diode D2, a MOS tube Q1 and a resistor R1; after the resistor R12 and the capacitor C2 are connected in parallel, one end is connected to the first end of the primary winding L1, and the other end is connected to the cathode of the diode D2, the anode of the diode D2 is connected to the second end of the primary winding L1 and the drain of the MOS tube Q1, the source of the MOS tube Q1 is connected to one end of the resistor R1, and the other end of the resistor R1 is grounded.

[0019] Furthermore, the output end of the PWM control circuit is connected to the gate of the MOS tube Q1.

[0020] Furthermore, the feedback circuit and the PWM control circuit are connected via an optical coupler U1.

[0021] Furthermore, the feedback circuit includes a resistor R19, a resistor R18, a resistor R20, a resistor R21, a voltage regulator U4, a capacitor C7 and a capacitor C8;

[0022] The input end of the resistor R19 is connected to the output end of the filter circuit, the output end of the resistor R19 is connected to the input end of the resistor R18, and the output end of the resistor R18 is connected to the negative input end of the optocoupler U1; the output end of the resistor R19 is also connected to the positive input end of the optocoupler U1;

[0023] The input end of the resistor R20 is connected to the output end of the filter circuit, the output end of the resistor R20 is connected to the input end of the resistor R21, and the output end of the resistor R21 is grounded; the output end of the resistor R20 is also connected to the reference end of the voltage regulator U4; the positive electrode of the voltage regulator U4 is grounded, and the negative electrode of the voltage regulator U4 is connected to the negative electrode of the input end of the optocoupler U1.

[0024] Furthermore, the input end of the rectifier circuit is connected to a common mode inductor FL1, and the input end of the common mode inductor FL1 is connected to the charging interface;

[0025] The output end of the filter circuit is connected to a common-mode inductor FL2, and the output end of the common-mode inductor FL2 is connected to the battery assembly.

[0026] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0027] 1. The utility model provides a battery assembly in the heater to supply power to the heating tube, and charges the battery assembly through a charging line power management assembly, so that the heater can be carried and used, thereby expanding the use environment of the heater;

[0028] 2. The voltage stabilization output can be achieved by adjusting the transformer's energy storage and energy release strength through feedback circuit, PWM control circuit and voltage stabilization regulation circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a portable heater provided by an embodiment of the utility model;

[0030] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective;

[0031] Figure 3 It is a cross-sectional view of the heater body in the embodiment of the utility model;

[0032] Figure 4 Schematic diagram of the circuit structure of the power management component in the embodiment of the utility model;

[0033] Figure 5 Schematic diagram of the circuit structure of the rectifier circuit in the embodiment of the utility model;

[0034] Figure 6 Schematic diagram of the circuit structure of the transformer circuit in the embodiment of the utility model;

[0035] Figure 7 Schematic diagram of the circuit structure of the filter circuit in the embodiment of the utility model;

[0036] Figure 8 Schematic diagram of the circuit structure of the feedback circuit in the embodiment of the utility model;

[0037] Fig. 9 This is a schematic diagram of the circuit structure of the PWM control circuit in the embodiment of the utility model;

[0038] Fig.10 This is a schematic diagram of the circuit structure of the voltage stabilizing and regulating circuit in the embodiment of the utility model;

[0039] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0040] 1. Heater body; 11. Shell; 111. Reflector; 112. Front cavity; 113. Rear cavity; 114. Heat port; 115. Charging port; 116. Heat dissipation hole; 12. Heat pipe; 13. Battery assembly; 14. Power management assembly; 141. Rectifier circuit; 142. Transformer circuit; 143. Filter circuit; 144. Feedback circuit; 145. PWM control circuit; 146. Voltage regulation circuit; 15. Reflector; 2. Charging cable; 21. First plug; 22. Second plug. DETAILED DESCRIPTION

[0041] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0043] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0044] A portable heater comprises a heater body 1 and a charging cable 2 detachably connected to the heater body 1.

[0045] The heater body 1 includes a shell 11, a heating tube 12, a battery assembly 13 and a power management assembly 14. A reflector 111 is provided in the shell 11, and the reflector 111 divides the interior of the shell 11 into a front cavity 112 and a rear cavity 113. The heating tube 12 is provided in the front cavity 112, and a heating port 114 connected to the front cavity 112 is provided on the front side of the shell 11. The battery assembly 13 and the power management assembly 14 are both provided in the rear cavity 113, and a charging interface 115 is provided on the rear side of the shell 11, and one end of the charging interface 115 extends into the rear cavity 113. Heat dissipation holes 116 are provided on the left and right sides of the shell 11, and the heat dissipation holes 116 are connected to the rear cavity 113.

[0046] The heating tube 12 is connected to the battery assembly 13 , and the battery assembly 13 is connected to the charging interface 115 via the power management assembly 14 . The power management assembly 14 is used to convert alternating current into direct current and charge the battery assembly 13 .

[0047] One end of the charging cable 2 is provided with a first plug 21 matched with the charging interface 115 , and the other end of the charging cable 2 is provided with a second plug 22 matched with the mains.

[0048] The utility model provides a battery assembly 13 in the heater to supply power to the heating tube 12, and charges the battery assembly 13 through the power management assembly 14 of the charging line 2, so that the heater can be carried and used, and the heater can be carried out even in cold weather, thereby expanding the use environment of the heater.

[0049] In addition, the power management component 14 includes a rectifier circuit 141, a transformer circuit 142 and a filter circuit 143 connected in sequence. The input end of the rectifier circuit 141 is used to input alternating current, and the output end of the filter circuit 143 is used to output direct current.

[0050] The power management component 14 further includes a feedback circuit 144, a PWM control circuit 145 and a voltage regulation circuit 146. The input end of the feedback circuit 144 is connected to the output end of the filter circuit 143, the input end of the PWM control circuit 145 is connected to the output end of the feedback circuit 144, and the output end of the PWM control circuit 145 is connected to the voltage regulation circuit 146. The output end of the voltage regulation circuit 146 is connected to the transformer circuit 142.

[0051] The feedback circuit 144 is used to sample the voltage signal output by the filter circuit 143 to generate a feedback current signal. The PWM control circuit is used to generate a PWM control signal according to the feedback current signal. The voltage regulation circuit 146 is used to regulate the strength of the energy storage and release of the transformer circuit 142 according to the PWM control signal.

[0052] Specifically, Figure 5 As shown, the rectifier circuit 141 includes a full-bridge rectifier DB1 and an electrolytic capacitor EC5. The input end of the full-bridge rectifier DB1 is connected to the charging interface 115 through a common-mode inductor FL1, and the common-mode inductor FL1 is used to eliminate high-frequency interference in the input alternating current. The two ends of the electrolytic capacitor EC5 are respectively connected to the positive and negative poles of the output end of the full-bridge rectifier DB1, the positive pole of the output end of the full-bridge rectifier DB1 is connected to the transformer circuit 142, and the negative pole of the output end of the full-bridge rectifier DB1 is grounded.

[0053] The transformer circuit 142 is used to convert AC power into DC power. Figure 6 As shown, the transformer circuit 142 includes a transformer T1, a diode D7, a resistor R9 and an electrolytic capacitor EC4. The transformer has a primary winding L1, a first secondary winding L2 and a second secondary winding L3, and the first secondary winding L2 and the second secondary winding L3 are both reversely coupled to the primary winding L1.

[0054] One end of the primary winding L1 is connected to the output end of the rectifier circuit 141. The first end of the first secondary winding L2 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to one end of the resistor R9, the other end of the resistor R9 is connected to the anode of the electrolytic capacitor EC4, and the cathode of the electrolytic capacitor EC4 is grounded. The second end of the first secondary winding L2 is grounded. The first end of the second secondary winding L3 is connected to the filter circuit 143. The second end of the second secondary winding L3 is grounded.

[0055] When the transformer T1 is working, since the first secondary winding L2 is reversely coupled with the primary winding L1, in the positive half cycle, the diode D7 is not conducting, and the primary winding L1 is in an energy storage state. When the energy storage is completed, the polarity of the winding is reversed and becomes a negative half cycle. At this time, the diode D7 is conducting, and the first secondary winding L2 charges the electrolytic capacitor EC4 through the diode D7. When the charging reaches a certain level, the electrolytic capacitor EC4 starts to discharge and outputs a reference current signal to the PWM control circuit 145.

[0056] like Figure 7 As shown, the filter circuit 143 includes a diode D1, a resistor R4, a capacitor C2 and an electrolytic capacitor EC1. The positive pole of the diode D1 is connected to the first end of the second secondary winding L3, the cathode of the diode D1 is the output end of the filter circuit 143, and the cathode of the diode D1 is connected to the positive pole of the electrolytic capacitor EC1, and the negative pole of the electrolytic capacitor EC1 is grounded. One end of the resistor R4 is connected to the first end of the second secondary winding L3, and the other end is connected to the positive pole of the electrolytic capacitor EC1 through the capacitor C2, and the resistor R4 and the capacitor C2 are used to control the gain of the loop. The diode D1 is a rectifier diode, and when the transformer T1 works in the positive half cycle, the diode D1 is not conducting. When the transformer T1 works in the negative half cycle, the diode D1 is conducting, and the second secondary winding L3 charges the electrolytic capacitor EC1 through the diode D1. When the charging reaches a certain level, the electrolytic capacitor EC1 starts to discharge, and the first and second secondary windings L3 have a DC voltage output, and the electrolytic capacitor C2 has a filtering effect at the same time. The output end of the filter circuit 143 is also grounded through a plurality of parallel resistors and filter capacitors.

[0057] The output end of the filter circuit 143 is connected to the common mode inductor FL2 , and the output end of the common mode inductor FL2 is connected to the battery assembly 13 to provide direct current to the battery assembly 13 for charging the battery assembly 13 .

[0058] The feedback circuit 144 and the PWM control circuit 145 are connected via an optical coupler U1 to achieve electromagnetic isolation between the primary and secondary sides of the transformer. Figure 8 As shown, the feedback circuit 144 includes a resistor R19, a resistor R18, a resistor R20, a resistor R21, a voltage regulator U4, a capacitor C7 and a capacitor C8.

[0059] The input end of resistor R19 is connected to the output end of filter circuit 143, the output end of resistor R19 is connected to the input end of resistor R18, the output end of resistor R18 is connected to the negative input end of optocoupler U1, and the output end of resistor R19 is also connected to the positive input end of optocoupler U1.

[0060] The input end of the resistor R20 is connected to the output end of the filter circuit 143, the output end of the resistor R20 is connected to the input end of the resistor R21, and the output end of the resistor R21 is grounded. The output end of the resistor R20 is also connected to the reference end of the voltage regulator U4. The positive electrode of the voltage regulator U4 is grounded, and the negative electrode of the voltage regulator U4 is connected to the negative electrode of the input end of the optical coupler U1, and a stable reference voltage is output to the optical coupler U1.

[0061] like Fig. 9 As shown, the PWM controller in the PWM control circuit 145 selects the KP201 unit. The KP201 unit outputs a PWM control signal to the voltage regulating circuit 146 according to the feedback current signal from the feedback circuit 144 and the reference current signal from the first secondary winding L2. The voltage regulating circuit 146 adjusts the intensity of energy storage and release of the transformer circuit 142 according to the PWM control signal.

[0062] Specifically, Fig.10 As shown, the voltage regulating circuit 146 includes a resistor R12, a capacitor C2, a diode D2, a MOS transistor Q1 and a resistor R1. After the resistor R12 and the capacitor C2 are connected in parallel, one end is connected to the first end of the primary winding L1, and the other end is connected to the cathode of the diode D2. The anode of the diode D2 is connected to the second end of the primary winding L1 and the drain of the MOS transistor Q1. The source of the MOS transistor Q1 is connected to one end of the resistor R1, and the other end of the resistor R1 is grounded. The gate of the MOS transistor Q1 is connected to the output end of the PWM control circuit 145.

[0063] When the MOS tube Q1 is turned off, the transformer T1 does not work and no electric energy flows out. When the MOS tube Q1 is turned on, the transformer T1 starts to work. The voltage regulation circuit 146 performs PWM control on the MOS tube Q1 according to the received PWM control signal, that is, controls the on-time and off-time ratio of the MOS tube Q1, thereby adjusting the strength of the transformer energy storage and release, and realizing voltage stabilization output.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable heater, characterized in that: It includes a heater body and a charging cable detachably connected to the heater body; The heater body comprises a shell, a heating tube, a battery assembly and a power management assembly, wherein the heating tube, the battery assembly and the power management assembly are all arranged in the shell; a heating port is arranged on the front side of the shell, and a charging interface is also arranged on the shell; the heating tube is connected to the battery assembly, and the battery assembly is connected to the charging interface through the power management assembly, and the power management assembly is used to convert AC power into DC power and charge the battery assembly; One end of the charging cable is provided with a first plug matching the charging interface, and the other end of the charging cable is provided with a second plug matching the mains.

2. A portable heater according to claim 1, characterized in that: A reflective plate is arranged inside the shell, and the reflective plate divides the interior of the shell into a front cavity and a rear cavity; the heating tube is arranged in the front cavity, and the heating port is connected to the front cavity; the battery assembly and the power management assembly are both arranged in the rear cavity, and one end of the charging interface extends into the rear cavity.

3. A portable heater according to claim 2, characterized in that: The left and right sides of the shell are respectively provided with heat dissipation holes, and the heat dissipation holes are connected to the rear cavity.

4. A portable heater according to claim 1, characterized in that: The power management component includes a rectifier circuit, a transformer circuit and a filter circuit connected in sequence; the input end of the rectifier circuit is used to input alternating current, and the output end of the filter circuit is used to output direct current; It also includes a feedback circuit, a PWM control circuit and a voltage regulating circuit; the input end of the feedback circuit is connected to the output end of the filter circuit, the input end of the PWM control circuit is connected to the output end of the feedback circuit, the output end of the PWM control circuit is connected to the voltage regulating circuit; the output end of the voltage regulating circuit is connected to the transformer circuit; The feedback circuit is used to sample the voltage signal output by the filter circuit to generate a feedback current signal; the PWM control circuit is used to generate a PWM control signal according to the feedback current signal; The voltage stabilizing and regulating circuit is used to regulate the intensity of energy storage and release of electric energy of the transformer circuit according to the PWM control signal.

5. A portable heater according to claim 4, characterized in that: The transformer circuit includes a transformer T1, a diode D7, a resistor R9 and an electrolytic capacitor EC4; The transformer comprises a primary winding L1, a first secondary winding L2 and a second secondary winding L3, wherein the first secondary winding L2 and the second secondary winding L3 are both reversely coupled to the primary winding L1; The primary winding L1 is connected to the voltage stabilizing and regulating circuit; The first end of the first secondary winding L2 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to one end of the resistor R9, the other end of the resistor R9 is connected to the anode of the electrolytic capacitor EC4, and the cathode of the electrolytic capacitor EC4 is grounded; the second end of the first secondary winding L2 is grounded; A first end of the second secondary winding L3 is connected to the filter circuit; A second end of the second secondary winding L3 is grounded.

6. A portable heater according to claim 5, characterized in that: The voltage stabilizing and regulating circuit includes a resistor R12, a capacitor C2, a diode D2, a MOS tube Q1 and a resistor R1; after the resistor R12 and the capacitor C2 are connected in parallel, one end of the resistor R12 is connected to the first end of the primary winding L1, and the other end is connected to the cathode of the diode D2, the anode of the diode D2 is connected to the second end of the primary winding L1 and the drain of the MOS tube Q1, the source of the MOS tube Q1 is connected to one end of the resistor R1, and the other end of the resistor R1 is grounded.

7. A portable heater according to claim 6, characterized in that: The output end of the PWM control circuit is connected to the gate of the MOS tube Q1.

8. A portable heater according to claim 4, characterized in that: The feedback circuit and the PWM control circuit are connected via an optocoupler U1.

9. A portable heater according to claim 8, characterized in that: The feedback circuit includes a resistor R19, a resistor R18, a resistor R20, a resistor R21, a voltage regulator U4, a capacitor C7 and a capacitor C8; The input end of the resistor R19 is connected to the output end of the filter circuit, the output end of the resistor R19 is connected to the input end of the resistor R18, and the output end of the resistor R18 is connected to the negative input end of the optocoupler U1; the output end of the resistor R19 is also connected to the positive input end of the optocoupler U1; The input end of the resistor R20 is connected to the output end of the filter circuit, the output end of the resistor R20 is connected to the input end of the resistor R21, and the output end of the resistor R21 is grounded; the output end of the resistor R20 is also connected to the reference end of the voltage regulator U4; the positive electrode of the voltage regulator U4 is grounded, and the negative electrode of the voltage regulator U4 is connected to the negative electrode of the input end of the optocoupler U1.

10. A portable heater according to claim 4, characterized in that: The input end of the rectifier circuit is connected to a common mode inductor FL1, and the input end of the common mode inductor FL1 is connected to the charging interface; The output end of the filter circuit is connected to a common-mode inductor FL2, and the output end of the common-mode inductor FL2 is connected to the battery assembly.

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