Wide-voltage heating control circuit and heating body device

Abstract

The utility model discloses a wide voltage heating control circuit and a heating body device, when a voltage identification unit identifies that an input power supply is a first voltage, a central processing unit controls a first control switch and a third control switch to be switched on and a second control switch to be switched off, and a first heating unit and a second heating unit are connected in parallel; when the voltage identification unit identifies that the input power supply is second voltage, the central processing unit controls the second control switch to be closed, the first control switch and the third control switch to be disconnected, and the first heating unit and the second heating unit are connected in series. Through the arrangement of the structure of the switch switching unit, the electrical connection relation between the first heating unit and the second heating unit can be switched, the voltage identification unit is adopted to collect the voltage of the input power supply, and the central processing unit automatically adjusts the on-off state of each control switch according to the collected voltage. And the power utilization requirements of different countries can be met, manual switching is not needed, misoperation is prevented, and the use safety can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam iron heating control, in particular to a wide voltage heating control circuit and a heating body device. Background Art

[0002] The steam iron heats the water in the steam chamber through the heating element inside it, vaporizes it and sprays it out from the steam holes of the steam iron to iron the clothes. Due to its small size and simple use, it is suitable for use at home, long-distance travel or business trips.

[0003] However, it is found that the power voltages of different countries are different. Some countries or regions even have two power voltages at the same time. Since traditional steam irons can only adapt to specific voltage environments, the compatibility of steam irons in different regions is poor. Some users use them with power converters, which have problems such as low efficiency and large size. To solve this problem, some manufacturers configure two power circuits in the steam iron during production, which increases production and use costs.

[0004] There is a steam iron on the market, whose heating control circuit includes two heating branches, each of which is provided with a heating tube and a corresponding mechanical switch. By manually switching the mechanical switch, different heating branches can be connected under different power voltages. However, if the power voltage does not match the heating branch due to misoperation, the heating power of the heating tube will be reduced at best, and the heating tube may be damaged at worst, which poses a certain safety hazard.

[0005] The utility model provides a wide voltage heating control circuit and a heating body device, aiming to solve at least one of the above technical problems. Utility Model Content

[0006] In view of the above analysis, the utility model proposes a wide voltage heating control circuit and a heating body device to solve the deficiencies of the prior art.

[0007] The utility model is mainly realized through the following technical solutions:

[0008] The utility model provides a wide voltage heating control circuit, comprising a control device, a first heating unit, and a second heating unit;

[0009] The control device includes a central processing unit, a voltage identification unit, and a switch switching unit. The voltage identification unit is arranged at both ends of the input power supply and is electrically connected to the central processing unit, and is used to collect voltage information at both ends of the input power supply and send it to the central processing unit for judgment. The switch switching unit is electrically connected to the central processing unit;

[0010] The switch switching unit includes a first control switch, a second control switch and a third control switch; the control electrode of the first control switch, the control electrode of the second control switch and the control electrode of the third control switch are respectively electrically connected to the control end of the central processing unit, the first end of the first control switch is respectively electrically connected to the first end of the input power supply and the first end of the second control switch, and the first heating unit is connected in series between the second end of the first control switch and the second end of the second control switch;

[0011] The first end of the third control switch is electrically connected to the second end of the second control switch, the second heating unit is connected in series between the second end of the third control switch and the second end of the first control switch, and the second end of the third control switch is electrically connected to the second end of the input power supply;

[0012] When the voltage identification unit identifies that the input power supply is the first voltage, the central processing unit controls the first control switch and the third control switch to be closed, and controls the second control switch to be opened, so that the first heating unit is connected in parallel with the second heating unit;

[0013] When the voltage identification unit identifies that the input power supply is the second voltage, the central processing unit controls the second control switch to close, and controls the first control switch and the third control switch to open, and the first heating unit is connected in series with the second heating unit.

[0014] Furthermore, the wide voltage heating control circuit also includes a circuit protection unit, and the circuit protection unit is arranged between the input power supply and the central processing unit.

[0015] Furthermore, in order to ensure that the heating unit is prevented from burning due to over-high temperature during normal use, the circuit protection unit includes a temperature control switch and an overheat protection unit;

[0016] The temperature control switch is arranged between the second end of the input power supply and the second end of the second heating unit, and the overheat protection unit is arranged between the first end of the input power supply and the first end of the first control switch.

[0017] Furthermore, the wide voltage heating control circuit also includes a fourth control switch and a fluid delivery unit connected in series, one end of the fourth control switch is electrically connected to the first end of the first control switch, the other end of the fluid delivery unit is electrically connected to the central processing unit, and the control electrode of the fourth control switch is electrically connected to the central processing unit.

[0018] Furthermore, in order to meet voltage usage requirements in a wider range, the first voltage is smaller than the second voltage.

[0019] Furthermore, in order to reduce the volume occupied by the circuit, the central processing unit, the voltage identification unit, and the switch switching unit are integrated into one body to form the control device.

[0020] Furthermore, the first control switch, the second control switch and the third control switch are relays.

[0021] Furthermore, the fourth control switch is a mechanical switch, and the fluid delivery unit is a water pump.

[0022] The utility model also provides a heating device, which comprises a shell and the wide voltage heating control circuit.

[0023] Furthermore, in order to make full use of thermal energy, a first steam chamber and a second steam chamber which are arranged up and down and connected are provided in the shell, the first heating unit is provided in the first steam chamber, the second heating unit is provided in the second steam chamber, two separated flow channels are provided in the first steam chamber, and a water inlet and an air outlet are provided on the first steam chamber, one of the flow channels is respectively connected to the water inlet and the second steam chamber, and the other flow channel is respectively connected to the second steam chamber and the air outlet.

[0024] Compared with the prior art, the wide voltage heating control circuit and heating device provided by the technical solution of the utility model have the following beneficial effects:

[0025] 1. By setting the structure of the switch switching unit, the electrical connection relationship between the first heating unit and the second heating unit can be switched. The voltage of the input power supply is collected by the voltage identification unit. The central processing unit automatically adjusts the on-off state of each control switch according to the collected voltage. It can adapt to the electricity demand of different countries and perfectly support the wide voltage range of 120-240V. There is no need for manual switching to prevent misoperation, which can improve the safety and convenience of use.

[0026] 2. By configuring two heating units in the shell and arranging the positions of the two heating units, the two heating units can work simultaneously without being restricted by the different input power supply voltages, thereby improving the adaptability of the heating element device to different voltage inputs and achieving full utilization of thermal energy without increasing the volume too much.

[0027] 3. Set up a temperature control switch and an overheat protection unit. When the temperature of the heating unit is too high, the temperature control switch will automatically disconnect, which can effectively protect the heating unit to achieve the purpose of temperature control. When the current in the circuit is too large, the overheat protection unit will disconnect the circuit to prevent the appliance from burning. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a structural principle block diagram of a wide voltage heating control circuit provided by an embodiment of the utility model;

[0030] Figure 2 This is a circuit schematic diagram of a wide voltage heating control circuit provided by an embodiment of the utility model;

[0031] Figure 3 It is a structural schematic diagram of a heating device provided by an embodiment of the utility model;

[0032] Figure 4 It is a cross-sectional view of a heating device provided in an embodiment of the utility model.

[0033] The reference numerals are as follows:

[0034] 100. Input power supply, 1. Circuit protection unit, 2. Control device, 3. First heating unit, 4. Second heating unit, 5. Central processing unit, 6. Voltage identification unit, 7. Switch switching unit, 8. First control switch, 9. Second control switch, 10. Third control switch, 11. Temperature control switch, 12. Overheat protection unit, 13. Fourth control switch, 14. Fluid transport unit, 15. Power switch, 20. Shell, 20a. First steam chamber, 20b. Second steam chamber, 20c. Water inlet, 20d. Air outlet, 20e. Flow channel, 201. Upper cover plate, 202. Clamp plate, 203. Lower base plate. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the present invention, and thus to more clearly define the scope of protection claimed by the present invention, the present invention is described in detail below with respect to certain specific embodiments of the present invention. It should be noted that the following are only certain specific implementation methods of the present invention, which are only part of the embodiments of the present invention, wherein the specific and direct description of the relevant structures is only for the convenience of understanding the present invention, and each specific feature does not naturally and directly limit the scope of implementation of the present invention. The conventional selections and substitutions made by those skilled in the art under the guidance of the present invention shall be deemed to be within the scope of protection claimed by the present invention.

[0036] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] Example 1

[0038] like Figure 1-2 As shown, the utility model provides a wide voltage heating control circuit, including a circuit protection unit 1, a control device 2, a first heating unit 3, and a second heating unit 4. The control device 2 includes a central processing unit 5, a voltage identification unit 6, and a switch unit 7. The circuit protection unit 1 is arranged between the input power supply 100 and the central processing unit 5. The voltage identification unit 6 is arranged at both ends of the input power supply 100 and is electrically connected to the central processing unit 5, and is used to collect voltage information at both ends of the input power supply 100 and send it to the central processing unit 5 for judgment. The switch unit 7 is electrically connected to the central processing unit 5.

[0039] The switch switching unit 7 includes a first control switch 8, a second control switch 9 and a third control switch 10; the control electrode of the first control switch 8, the control electrode of the second control switch 9 and the control electrode of the third control switch 10 are respectively electrically connected to the control end of the central processing unit 5, the first end of the first control switch 8 is respectively electrically connected to the first end of the input power supply 100 and the first end of the second control switch 9, and the first heating unit 3 is connected in series between the second end of the first control switch 8 and the second end of the second control switch 9. The first end of the third control switch 10 is electrically connected to the second end of the second control switch 9, the second heating unit 4 is connected in series between the second end of the third control switch 10 and the second end of the first control switch 8, and the second end of the third control switch 10 is electrically connected to the second end of the input power supply 100.

[0040] When the voltage identification unit 6 identifies that the input power supply 100 is the first voltage, the central processing unit 5 controls the first control switch 8 and the third control switch 10 to be closed, controls the second control switch 9 to be disconnected, and the first heating unit 3 is connected in parallel with the second heating unit 4. When the voltage identification unit 6 identifies that the input power supply 100 is the second voltage, the central processing unit 5 controls the second control switch 9 to be closed, controls the first control switch 8 and the third control switch 10 to be disconnected, and the first heating unit 3 is connected in series with the second heating unit 4.

[0041] In this embodiment, the first control switch 8, the second control switch 9 and the third control switch 10 are relays (relay K1, relay K2, relay K3 in sequence). The first voltage is different from the second voltage, specifically, the first voltage is less than the second voltage, the first voltage is 120V, and the second voltage is 220-240V. The rated voltage, rated power and maximum output current of each heating unit in the circuit can be set according to actual needs, with the premise that each heating unit can work normally for a long time when normally powered on.

[0042] As one of the embodiments, when the first voltage is 120V and the second voltage is 240V, the rated voltages of the first heating unit 3 and the second heating unit 4 are set to be the same. In order to fully utilize the power of the two heating units, their rated powers are also the same. For example, both heating units are 120V / 500W, so that when the two heating units work at the same time, the total output power is equal to 1000W.

[0043] The input power supply 100 is automatically identified by the voltage identification unit 6, and the on and off of the first control switch 8, the second control switch 9 and the third control switch 10 are automatically controlled by the central processing unit 5 to switch the series-parallel relationship between the first heating unit 3 and the second heating unit 4, so that the two heating units work simultaneously.

[0044] Preferably, the circuit protection unit 1 includes a temperature control switch 11 and an overheat protection unit 12. The temperature control switch 11 is arranged between the second end of the input power supply 100 and the second end of the second heating unit 4, and the overheat protection unit 12 is arranged between the first end of the input power supply 100 and the first end of the first control switch 8. The overheat protection unit 12 is a fuse.

[0045] Preferably, the wide voltage heating control circuit further includes a fourth control switch 13 and a fluid delivery unit 14 connected in series, one end of the fourth control switch 13 is electrically connected to the first end of the first control switch 8, the other end of the fluid delivery unit 14 is electrically connected to the central processing unit 5, and the control electrode of the fourth control switch 13 is electrically connected to the central processing unit 5. The wide voltage heating control circuit further includes a power switch 15 electrically connected to the central processing unit 5. In this embodiment, the fourth control switch 13 is a mechanical switch, and the fluid delivery unit 14 is a water pump.

[0046] The central processing unit 5, the voltage identification unit 6, and the switch switching unit 7 are integrated into a control device 2. Among them, the first end of the first control switch 8 is electrically connected to the first electrical connection end of the central processing unit 5, the overheat protection unit 12 is arranged between the first electrical connection end of the central processing unit 5 and the first end (i.e., the live wire) of the input power supply 100, the second end of the first control switch 8 is electrically connected to the first output end of the central processing unit 5, the second end of the second control switch 9 is electrically connected to the second output end of the central processing unit 5, the second end of the third control switch 10 is electrically connected to the third output end of the central processing unit 5, and the second electrical connection end of the central processing unit 5 is electrically connected to the second end (i.e., the neutral wire) of the input power supply 100.

[0047] like Figure 3-4 As shown, the utility model also provides a heating device, which includes a housing 20 and the above-mentioned wide voltage heating control circuit.

[0048] The housing 20 is provided with a first steam chamber 20a and a second steam chamber 20b arranged up and down and connected, the first heating unit 3 is provided in the first steam chamber 20a, the second heating unit 4 is provided in the second steam chamber 20b, the first steam chamber 20a is provided with two separated and not directly connected flow channels 20e, the first steam chamber 20a is provided with a water inlet 20c and an air outlet 20d. One of the flow channels 20e is respectively connected to the water inlet 20c and the second steam chamber 20b, and the other flow channel 20e is respectively connected to the second steam chamber 20b and the air outlet 20d; the circuit protection unit 1 is installed on the housing 20, and the first heating unit 3 and the second heating unit 4 are heating pipes cast on the housing 20.

[0049] In this embodiment, the housing 20 includes an upper cover plate 201, a clamping plate 202 and a lower bottom plate 203 which are sequentially arranged and connected from top to bottom, the first steam chamber 20a is arranged between the upper cover plate 201 and the clamping plate 202, and the second steam chamber 20b is arranged between the lower bottom plate 203 and the clamping plate 202. The temperature control switch 11 and the overheat protection unit 12 are installed on the lower bottom plate 203, the first heating unit 3 is installed on the clamping plate 202, and the second heating unit 4 is installed on the lower bottom plate 203. The water inlet 20c is arranged on the upper cover plate 201, and the air outlet 20d is arranged at one end of the clamping plate 202. The outlet end of one flow channel 20e is connected with the inlet end of the second steam chamber 20b, so that the fluid flows from the first steam chamber 20a into the second steam chamber 20b, and the inlet end of the other flow channel 20e is connected with the outlet end of the second steam chamber 20b, so that the fluid flows from the second steam chamber 20b into the first steam chamber 20a. The housing 20 adopts a split design, which is convenient for processing and assembly.

[0050] When in use, the shell 20 is first heated by the heating unit. After the heating is completed, the fourth control switch 13 is started to pump water into the shell 20. When the temperature of the shell 20 does not reach the set temperature, the shell 20 continues to be heated by the heating unit. When the temperature of the shell 20 reaches the set temperature, the current temperature is maintained and heating is no longer continued.

[0051] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A wide voltage heating control circuit, characterized in that: It comprises a control device (2), a first heating unit (3), and a second heating unit (4); The control device (2) comprises a central processing unit (5), a voltage identification unit (6), and a switch switching unit (7); the voltage identification unit (6) is arranged at both ends of the input power supply (100) and is electrically connected to the central processing unit (5), and is used to collect voltage information at both ends of the input power supply (100) and send it to the central processing unit (5) for judgment; the switch switching unit (7) is electrically connected to the central processing unit (5); The switch switching unit (7) comprises a first control switch (8), a second control switch (9) and a third control switch (10); a control electrode of the first control switch (8), a control electrode of the second control switch (9) and a control electrode of the third control switch (10) are respectively electrically connected to a control end of a central processing unit (5); a first end of the first control switch (8) is respectively electrically connected to a first end of an input power source (100) and a first end of the second control switch (9); and a first heating unit (3) is connected in series between a second end of the first control switch (8) and a second end of the second control switch (9); The first end of the third control switch (10) is electrically connected to the second end of the second control switch (9), the second heating unit (4) is connected in series between the second end of the third control switch (10) and the second end of the first control switch (8), and the second end of the third control switch (10) is electrically connected to the second end of the input power supply (100); When the voltage identification unit (6) identifies that the input power supply (100) is a first voltage, the central processing unit (5) controls the first control switch (8) and the third control switch (10) to be closed, and controls the second control switch (9) to be opened, so that the first heating unit (3) and the second heating unit (4) are connected in parallel; When the voltage identification unit (6) identifies that the input power supply (100) is a second voltage, the central processing unit (5) controls the second control switch (9) to close, and controls the first control switch (8) and the third control switch (10) to open, and the first heating unit (3) is connected in series with the second heating unit (4).

2. The wide voltage heating control circuit according to claim 1, characterized in that: The wide voltage heating control circuit further comprises a circuit protection unit (1), wherein the circuit protection unit (1) is arranged between the input power supply (100) and the central processing unit (5).

3. The wide voltage heating control circuit according to claim 2, characterized in that: The circuit protection unit (1) comprises a temperature control switch (11) and an overheat protection unit (12); The temperature control switch (11) is arranged between the second end of the input power supply (100) and the second end of the second heating unit (4), and the overheat protection unit (12) is arranged between the first end of the input power supply (100) and the first end of the first control switch (8).

4. The wide voltage heating control circuit according to claim 1, characterized in that: The wide voltage heating control circuit further comprises a fourth control switch (13) and a fluid delivery unit (14) connected in series, one end of the fourth control switch (13) being electrically connected to the first end of the first control switch (8), the other end of the fluid delivery unit (14) being electrically connected to the central processing unit (5), and the control electrode of the fourth control switch (13) being electrically connected to the central processing unit (5).

5. The wide voltage heating control circuit according to any one of claims 1 to 4, characterized in that: The first voltage is lower than the second voltage.

6. The wide voltage heating control circuit according to claim 1, characterized in that: The central processing unit (5), the voltage identification unit (6), and the switch switching unit (7) are integrated into one body to form the control device (2).

7. The wide voltage heating control circuit according to any one of claims 1 to 4, characterized in that: The first control switch (8), the second control switch (9) and the third control switch (10) are relays.

8. The wide voltage heating control circuit according to claim 4, characterized in that: The fourth control switch (13) is a mechanical switch, and the fluid delivery unit (14) is a water pump.

9. A heating device, characterized in that: It comprises a housing (20) and a wide voltage heating control circuit as claimed in any one of claims 1 to 8.

10. The heating device according to claim 9, characterized in that: The shell (20) is provided with a first steam chamber (20a) and a second steam chamber (20b) which are arranged up and down and are connected. The first heating unit (3) is arranged in the first steam chamber (20a), and the second heating unit (4) is arranged in the second steam chamber (20b). The first steam chamber (20a) is provided with two separated flow channels (20e). The first steam chamber (20a) is provided with a water inlet (20c) and an air outlet (20d). One of the flow channels (20e) is respectively connected to the water inlet (20c) and the second steam chamber (20b), and the other of the flow channels (20e) is respectively connected to the second steam chamber (20b) and the air outlet (20d).

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