Voltage-adaptive heating apparatus and fluid heating appliance comprising same

Abstract

A voltage-adaptive heating apparatus and a fluid heating appliance comprising same. The voltage-adaptive heating apparatus comprises a heating load (20) and a control circuit; the control circuit comprises a voltage measurement circuit, a controller and a first silicon controlled rectifier (40); the voltage measurement circuit measures the voltage of an input power supply; the controller acquires a voltage value of the input power supply by means of the voltage measurement circuit; the first silicon controlled rectifier (40) is arranged on a power supply loop of the heating load (20); the controller is used for controlling the on or off time of the first silicon controlled rectifier (40) on the basis of the voltage value of the input power supply, so as to control the heating power range of the heating load (20).

Description

Voltage adaptive heating device and fluid heating appliance having the same Technical Field

[0001] The utility model relates to the technical field of fluid heating appliances, in particular to a voltage adaptive heating device and a fluid heating appliance having the same. Background Art

[0002] Liquid heating appliances such as hanging irons and evaporators usually use heaters to heat liquids to reach a higher temperature range, thereby converting the liquid into a gas state. Through the output of higher temperature steam, they can achieve purposes such as ironing clothes and steaming hair care.

[0003] Referring to Figure 1 , conventional garment steamers primarily use a channel switch to switch heating channels to accommodate varying input power voltages. For example, when the input power voltage is 220V AC, the corresponding heating wire for 220V generates 650W of heating power. When the input power voltage is 120V AC, the channel switch can be used to select a heating channel, selecting a different heating wire (the one corresponding to 220V) for heating, generating 650W of heating power. This requires the user to manually select heating wires with different resistance values ​​based on the input voltage. However, in some cases, the user may not correctly select the heating wire to heat the liquid. For example, when the input voltage is 220V, a 120V / 650W setting may be selected. This can result in the heating power significantly exceeding the permitted power range, potentially causing problems such as excessive power consumption, equipment burnout, or fire.

[0004] Utility Model Content

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one object of the present invention is to provide a voltage adaptive heating device and a fluid heating appliance having the same.

[0006] On the one hand, to achieve the above-mentioned purpose, according to an embodiment of the present invention, a voltage-adaptive heating device comprises: a heating load and a control circuit, wherein the control circuit comprises:

[0007] A voltage detection circuit, wherein the voltage detection circuit is used to detect the voltage of the input power supply;

[0008] a controller, the controller being connected to the voltage detection circuit to obtain a voltage value of an input power supply through the voltage detection circuit;

[0009] A first thyristor is provided on a power supply circuit of the heating load, and the controller is used to control the on or off time of the first thyristor according to the voltage value of the input power supply to control the heating power range of the heating load.

[0010] Furthermore, according to an embodiment of the present invention, the voltage adaptive heating device further includes:

[0011] a heating boiler, wherein the heating load is arranged in the heating boiler;

[0012] A water pump, wherein the water pump and the heating boiler are connected via the delivery pipeline respectively; the water pump is used to pump liquid into the heating boiler under the control of the control circuit, so as to heat the liquid in the heating boiler through the heating load.

[0013] Furthermore, according to an embodiment of the present invention, the voltage detection circuit includes:

[0014] A power supply module, wherein an input end of the power supply module is connected to the input power supply, and outputs a voltage detection value of the input power supply to the controller.

[0015] Furthermore, according to an embodiment of the present invention, the power supply module is further configured to perform voltage conversion on the input power supply to output a first DC power supply.

[0016] Furthermore, according to an embodiment of the present invention, the power supply module is also used to detect the zero-crossing signal of the input power supply and output the zero-crossing signal to the controller, and the controller controls the conduction of the first thyristor according to the zero-crossing signal.

[0017] Furthermore, according to an embodiment of the present invention, the control circuit further includes:

[0018] A first driving module, wherein the controlled end of the first thyristor is connected to the controller via the first driving module, and the first driving module is used to drive the first thyristor to be turned on or off according to a control signal output by the controller.

[0019] Furthermore, according to an embodiment of the present invention, the control circuit also includes: a temperature detection circuit, which is used to detect the temperature of the heating boiler; the controller is also used to obtain the temperature value of the heating boiler through the temperature sensor, and perform constant temperature heating control on the liquid in the heating boiler through the first thyristor according to the temperature value.

[0020] Furthermore, according to an embodiment of the present invention, the temperature detection circuit includes:

[0021] a thermistor NTC1, one end of the thermistor NTC1 being connected to the second DC power supply;

[0022] Resistor R13, one end of the resistor R13 is connected to the other end of the thermistor NTC1, the other end of the resistor R13 is connected to a control end or a reference ground end of the controller, and a common end of the thermistor NTC1 and the resistor R13 is connected to the temperature detection end of the controller.

[0023] Furthermore, according to an embodiment of the present invention, the control circuit further includes:

[0024] a water pump driving circuit, the water pump driving circuit being connected to the controller and the water pump respectively, so as to drive and control the water pump to pump water under the control of the controller;

[0025] and / or a voltage conversion circuit, wherein the voltage conversion circuit is connected to the power module and the controller to convert the first DC power supply output by the power module into a second DC power supply to power the controller;

[0026] and / or a key control circuit, the key control circuit being connected to the controller and having one or more keys for sending control signals to the controller;

[0027] and / or an indicator light circuit, wherein the indicator light circuit is connected to the controller and turns on and off the indicator light under the control of the controller to indicate the working status.

[0028] On the other hand, an embodiment of the present invention further provides a fluid heating appliance, comprising:

[0029] case;

[0030] The above-mentioned voltage-adaptive heating device is installed in the shell.

[0031] The voltage adaptive heating device provided by the embodiment of the present invention detects the voltage of the input power supply through a voltage detection circuit; a controller is connected to the voltage detection circuit to obtain the voltage value of the input power supply through the voltage detection circuit; a first thyristor is arranged on the power supply circuit of the heating load, and the controller is used to control the on or off time of the first thyristor according to the voltage value of the input power supply to control the heating power range of the heating load, so that it can automatically adapt to different input voltages. Even when a lower voltage device (such as a 120V / 1850W device) is inserted into a higher power supply (such as a 220V power supply), the heating time ratio D of the first thyristor can be automatically adjusted according to the input voltage, so that the average power of the heating load does not exceed the set power range, thereby avoiding problems such as excessive power burning the device or causing fire due to misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a schematic diagram of the circuit structure of a heating device that controls a heating channel through a manual switch in the prior art;

[0033] FIG2 is a schematic diagram of the circuit structure of a voltage adaptive heating device provided by an embodiment of the present utility model;

[0034] FIG3 is a schematic structural diagram of a voltage adaptive heating device provided by an embodiment of the present utility model;

[0035] FIG4 is a schematic structural diagram of a garment steamer with a voltage-adaptive heating device according to an embodiment of the present invention;

[0036] FIG5 is a schematic structural diagram of an evaporator with a voltage adaptive heating device provided by an embodiment of the present invention.

[0037] Reference numerals: steam 10 ; heating load 20 ; temperature sensor 30 ; first thyristor 40 ; heat sink 50 ; plug 60 .

[0038] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the present invention, the following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0040] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] On the one hand, referring to Figures 2 and 3, an embodiment of the present invention provides a voltage-adaptive heating device, including: a heating load 20 and a control circuit, the control circuit including a voltage detection circuit, a controller and a first thyristor 40, the voltage detection circuit is used to detect the voltage of the input power supply; the controller U3 is connected to the voltage detection circuit to obtain the voltage value of the input power supply through the voltage detection circuit; the first thyristor 40 is arranged on the power supply circuit of the heating load 20, and the controller U3 is used to control the on or off time of the first thyristor 40 according to the voltage value of the input power supply to control the heating power range of the heating load 20.

[0042] Specifically, as shown in Figure 2, the voltage detection circuit detects the voltage of the input power supply and outputs the voltage detection value via the V_DET signal terminal. This voltage detection value is then output to the controller U3 via the V_DET signal terminal. After obtaining the input power supply voltage, the controller U3 can control the on / off state of the first thyristor 40 based on the input power supply voltage. Since the thyristor is located in the power supply circuit of the heating load 20, the controller U3 can control the on / off time of the thyristor by controlling the on / off state of the thyristor. For example, within a time period T, the on time of the heating load 20 is T1 and the off time is T2. The heating time ratio D of the heating load 20 within the time period is D = T1 / T, where T = T1 + T2. D is a value less than or equal to 1. A larger heating time ratio D indicates a longer time period within the time period, and under the same input voltage, the average power generated by the heating load 20 is greater. Therefore, the value of the heating time ratio D needs to be adjusted accordingly based on the output power voltage to ensure that the average power of the heating load 20 is within a set range. For example, when the voltage detection circuit detects that the input power is 220V AC, the heating time ratio D can be a relatively small value, such as 0.2. When the voltage detection circuit detects that the input power is 120V AC, the heating time ratio D can be a relatively large value, such as 0.7. In this way, the controller U3 adjusts the ratio of the on-time (T1) and off-time (T2) of the heating load 20 of the first thyristor 40 based on the input voltage. This ensures that the average power generated by the heating load 20 is substantially the same under different voltages. This allows for automatic adaptation to different input voltages. When a lower voltage device (e.g., a 120V / 1850W device) is plugged into a higher power supply (e.g., a 220V power supply), the heating power will not significantly exceed the permitted power range. This prevents problems such as equipment damage or fire caused by improper operation due to excessive power.

[0043] Referring to FIG3 , the voltage-adaptive heating device further comprises: a heating boiler and a water pump, wherein the heating load 20 is disposed within the heating boiler; the water pump and the heating boiler are connected via the delivery pipe; the water pump is configured to, under the control of the control circuit, pump liquid into the heating boiler, thereby heating the liquid within the heating boiler via the heating load 20. As shown in FIG3 , the voltage-adaptive heating device further comprises a water tank, wherein the water tank may contain liquid. The controller U3 may control the water pump to operate and pump water from the water tank into the boiler. The heating load 20 is disposed within the heating boiler. The controller U3 may control the conduction or cutoff of the first thyristor 40 to control the heating of the heating load 20, thereby heating the liquid within the heating boiler.

[0044] Referring to FIG2 , the voltage detection circuit includes a power module U1, the input terminal of which is connected to the input power supply, and outputs the voltage detection value of the input power supply to the controller U3. As shown in FIG2 , the power module is connected to the input of the power supply via the LIN terminal. The power supply is introduced into the LIN terminal of the power module U1 via a resistor R3 and a diode D2. The detection voltage is then transmitted through the resistor R2 via the VSEN terminal and output to the controller U3 via a voltage detection signal V_DET. In this way, the controller U3 can obtain the voltage value of the input power supply and adjust the heating time ratio D value of the first thyristor 40 according to the voltage value to ensure that the heating wire operates within the set average power range.

[0045] Referring to Figure 2 , the power module is further configured to perform voltage conversion on the input power supply to output a first DC power supply. As shown in Figure 2 , in addition to detecting the voltage of the input power supply, the power module also performs voltage conversion on the input power supply, outputting a relatively low-voltage power supply for use by various circuit modules. For example, the voltage value of the first DC power supply output by the power module after voltage conversion can be 5V.

[0046] Referring to Figure 2, the power module is also used to detect the zero-crossing signal of the input power supply and output the zero-crossing signal to the controller U3. The controller U3 then controls the conduction of the first thyristor 40 based on the zero-crossing signal. The power module can also obtain the zero-crossing signal of the input AC power (input power) and control the conduction of the first thyristor 40 when the zero-crossing signal arrives. This prevents heating from occurring when the real-time voltage of the input AC power reaches a peak value, thereby avoiding issues such as triggering power supply overload protection and / or suppressing arc generation.

[0047] Referring to Figure 2 , the control circuit further includes a first drive module. The controlled terminal of the first thyristor 40 is connected to the controller U3 via the first drive module. The first drive module is configured to drive the first thyristor 40 (Q2) on or off based on a control signal output by the controller U3. The first thyristor 40 (Q2) drive circuit controls the drive of the first thyristor 40 (Q2). This allows the first thyristor 40 (Q2) to be quickly turned on or off, addressing the issue of weak output signals and poor drive capability from the controller U3.

[0048] Referring to Figure 2 , the control circuit further includes a temperature detection circuit for detecting the temperature of the heating boiler. The controller U3 is further configured to obtain the boiler's temperature via the temperature sensor 30 and, based on this temperature, to control constant temperature heating of the liquid within the boiler via the first thyristor. As shown in Figure 2 , the temperature sensor 30 can be mounted on the boiler to detect the boiler's temperature and obtain the temperature of the liquid within. The detected temperature is then output to the controller U3, which then controls the first thyristor to turn on or off based on the detected temperature, thereby controlling the heating of the liquid within the boiler. During constant temperature heating control, when the controller U3 detects a temperature below a set value (e.g., 120 degrees Celsius) via the temperature sensor 30, it outputs a conduction control signal to turn on the first thyristor, thereby energizing the heater's power supply circuit and heating the liquid within the boiler. When the controller U3 detects through the temperature sensor 30 that the temperature of the liquid in the heating boiler is higher than the set value, it can output a disconnect control signal to control the disconnection of the electronic switch, so that the power supply circuit of the heater is disconnected and the heater stops heating the liquid in the heating boiler. In this way, the temperature of the liquid in the heating boiler can be maintained at a constant temperature. In one embodiment of the present invention, during the process of heating the liquid from room temperature to a set temperature (e.g., 120 degrees Celsius) through the heating wire, the controller U3 can adjust the heating time ratio D according to the output voltage value of the voltage detection circuit, and control the first thyristor 40 to be turned on or off according to the heating time ratio D to heat the room temperature liquid to the set temperature value. After the liquid is heated to the set temperature value, it is necessary to control the liquid to be constant temperature. The controller U3 can control the first thyristor 40 to be turned on or off according to the temperature value detected by the temperature detection circuit to heat the liquid to a constant temperature.

[0049] As shown in Figure 2, the temperature detection circuit includes a thermistor NTC1 and a resistor R13. One end of the thermistor NTC1 is connected to the second DC power supply; one end of the resistor R13 is connected to the other end of the thermistor NTC1, which is also connected to a control terminal or a reference ground terminal of the controller U3. The common terminal of the thermistor NTC1 and resistor R13 is connected to the temperature detection terminal of the controller U3. The temperature detection circuit operates by connecting the thermistor NTC1 and resistor R13 in series to form a voltage divider circuit, thereby dividing a 3.3V voltage and outputting it to the controller U3 via an NTC signal. Because the resistance value of the thermistor NTC1 is linearly related to temperature, the controller U3 obtains the corresponding temperature value by reading the divided voltage value between the thermistor NTC1 and resistor R13, and controls the first thyristor 40 to turn on or off based on the temperature value.

[0050] Referring to Figure 2, the control circuit also includes a water pump drive circuit, which is connected to the controller U3 and the water pump, respectively, to control the pump's pumping operation under the control of the controller U3. The water pump drive circuit is located in the water pump's power supply circuit. This allows the controller U3 to control the power supply circuit's connection and disconnection. When the water pump's power supply circuit is connected, the water pump begins operating and pumps liquid into the heating boiler for heating. When the water pump's power supply circuit is disconnected, the water pump stops pumping water.

[0051] As shown in Figure 2, the water pump drive circuit includes: a diode D1 and a second thyristor Q1. The anode of the diode D1 is connected to one end of the input power supply, the cathode of the diode D1 is connected to the cathode of the second thyristor Q1, the anode of the second thyristor Q1 is connected to the positive end of the water pump, the negative end of the water pump is connected to the other end of the input power supply, and the controlled electrode of the second thyristor Q1 is connected to the water pump control end of the controller U3 through a resistor.

[0052] The working process of the water pump drive circuit is as follows: when the controller U3 outputs a high-level signal through the PUMP_CTL signal terminal via pin 2, the high-level signal can make the control electrode and cathode of the second thyristor Q1 conductive. Under the action of the power supply, the second thyristor Q2 can be turned on, and the power supply is output to the water pump, so that the power at both ends of the water pump is connected, and the water pump starts to pump water. On the contrary, when the controller U3 outputs a low-level signal through the PUMP_CTL signal terminal via pin 2, the control electrode and cathode of the second thyristor Q2 are cut off, the second thyristor Q2 is cut off, the power at both ends of the water pump is disconnected, and the water pump stops pumping water.

[0053] Referring to FIG2 , the control circuit further includes a voltage conversion circuit, which is connected to the power module and the controller U3 to convert the first DC power supply output by the power module into a second DC power supply to power the controller U3. As shown in FIG2 , the voltage conversion circuit includes a voltage conversion module, the output of which is connected to the first DC power supply output terminal 5V of the power module U1 to convert the first DC power supply into a second DC power supply. The first DC power supply can be 5V, and the second DC power supply can be 3.3V. The second DC power supply can be used to power the controller U3.

[0054] Referring to FIG2 , the control circuit further includes a key control circuit, which is connected to the controller U3 and has one or more keys for sending control signals to the controller U3;

[0055] As shown in Figure 2, the key control circuit includes a first key STEAM1, a second key MODE1 and a third key Explode1. One end of the first key STEAM1 is connected to the reference ground, and the other end of the first key STEAM1 is connected to the key signal detection terminal AD_KEY of the controller U3. The key signal detection terminal AD_KEY is also connected to the 3.3V pull-up power supply through a resistor R5. One end of the second key MODE1 is connected to the reference ground through a resistor R8, and the other end of the second key MODE1 is connected to the key signal detection terminal AD_KEY of the controller U3. One end of the third key Mxplode1 is connected to the reference ground through a resistor R9, and the other end of the third key Mxplode1 is connected to the key signal detection terminal AD_KEY of the controller U3.

[0056] As shown in Figure 4, the key control circuit operates as follows: by pressing the first, second, and third buttons, Steam, Mode, and Explode, the two ends of the control buttons are turned on, and resistors R8, R9, and R5 form a voltage divider circuit. Because resistors R8 and R9 have different resistance values, the first, second, and third buttons Steam, Mode, and Explode generate different voltages when turned on. By reading these different voltages, the controller U3 obtains different control signals and executes corresponding operations, such as stopping heating or pumping.

[0057] Referring to FIG2 , the control circuit also includes an indicator light circuit, which is connected to the controller U3 and, under the control of the controller U3, turns the indicator lights on and off to indicate the operating status. As shown in FIG2 , the indicator light circuit includes: a first LED lamp LED10, a second LED lamp LED11, a third LED lamp LED12, and a fourth LED lamp LED13. The cathodes of the first LED lamp LED10, the second LED lamp LED11, the third LED lamp LED12, and the fourth LED lamp LED13 are each connected to a reference ground, and the anodes of the first LED lamp LED10, the second LED lamp LED11, the third LED lamp LED12, and the fourth LED lamp LED13 are each connected to a control terminal of the controller U3 via a resistor. As shown in FIG2 , the controller U3U1 can output a high-level signal via pin 7, pin 8, pin 11, or pin 10, thereby illuminating the first LED lamp LED1, the second LED lamp LED2, the third LED lamp LED3, or the fourth LED lamp LED4. On the contrary, when a low-level signal is output, the corresponding LED light can be turned off, so that the working status can be indicated by lighting up and turning off the corresponding LED light.

[0058] Referring to Figures 4 and 5 , this utility model further provides a fluid heating appliance comprising: a housing and the aforementioned voltage-adaptive heating device, wherein the voltage-adaptive heating device is mounted within the housing. The fluid heating appliance may include a steamer, a garment steamer, or other such appliance.

[0059] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0060] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A voltage adaptive heating device, characterized in that: include: A heating load and a control circuit, the control circuit comprising: A voltage detection circuit, wherein the voltage detection circuit is used to detect the voltage of an input power supply; A controller, the controller being connected to the voltage detection circuit to obtain a voltage value of an input power supply through the voltage detection circuit; A first thyristor is arranged on a power supply circuit of the heating load, and the controller is used to control the on or off time of the first thyristor according to the voltage value of the input power supply to control the heating power range of the heating load.

2. The voltage adaptive heating device according to claim 1, characterized in that: Also includes: a heating boiler, wherein the heating load is arranged in the heating boiler; A water pump, wherein the water pump and the heating boiler are connected via delivery pipes respectively; the water pump is used to pump liquid into the heating boiler under the control of the control circuit, so as to heat the liquid in the heating boiler through the heating load.

3. The voltage adaptive heating device according to claim 1 or 2, characterized in that: The voltage detection circuit comprises: A power supply module, wherein an input end of the power supply module is connected to the input power supply, and outputs a voltage detection value of the input power supply to the controller.

4. The voltage adaptive heating device according to claim 3, characterized in that: The power supply module is also used to perform voltage conversion on the input power supply to output a first DC power supply.

5. The voltage adaptive heating device according to claim 3, characterized in that: The power supply module is also used to detect a zero-crossing signal of the input power supply and output the zero-crossing signal to the controller, and the controller controls the conduction of the first thyristor according to the zero-crossing signal.

6. The voltage adaptive heating device according to claim 1 or 2, characterized in that: The control circuit further comprises: A first driving module, wherein the controlled end of the first thyristor is connected to the controller via the first driving module, and the first driving module is used for driving the first thyristor to be turned on or off according to a control signal output by the controller.

7. The voltage adaptive heating device according to claim 2, characterized in that: The control circuit also includes: a temperature detection circuit, which is used to detect the temperature of the heating boiler; the controller is also used to obtain the temperature value of the heating boiler through the temperature sensor, and perform constant temperature heating control on the liquid in the heating boiler through the first thyristor according to the temperature value.

8. The voltage adaptive heating device according to claim 7, characterized in that: The temperature detection circuit comprises: a thermistor (NTC1), one end of the thermistor (NTC1) being connected to a second DC power supply; A resistor (R13), one end of the resistor (R13) is connected to the other end of the thermistor (NTC1), the other end of the resistor (R13) is connected to a control end or a reference ground end of the controller, and a common end of the thermistor (NTC1) and the resistor (R13) is connected to a temperature detection end of the controller.

9. The voltage adaptive heating device according to claim 3, characterized in that: The control circuit further comprises: A water pump driving circuit, wherein the water pump driving circuit is connected to the controller and the water pump respectively, so as to drive and control the water pump to pump water under the control of the controller; and / or a voltage conversion circuit, wherein the voltage conversion circuit is connected to the power module and the controller to convert the first DC power supply output by the power module into a second DC power supply to power the controller; and / or a key control circuit, the key control circuit is connected to the controller, the key control circuit is provided with one or more keys for sending a control signal to the controller; And / or an indicator light circuit, the indicator light circuit is connected to the controller and turns on and off the indicator light under the control of the controller to indicate the working status.

10. A fluid heating appliance, characterized in that: include: case; The voltage adaptive heating device according to any one of claims 1 to 9, wherein the voltage adaptive heating device is installed in the shell.

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