CN107874625B - Heating container control circuit, heating container control method and coffee machine - Google Patents
Heating container control circuit, heating container control method and coffee machine Download PDFInfo
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- CN107874625B CN107874625B CN201610863981.1A CN201610863981A CN107874625B CN 107874625 B CN107874625 B CN 107874625B CN 201610863981 A CN201610863981 A CN 201610863981A CN 107874625 B CN107874625 B CN 107874625B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 143
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 47
- 230000002159 abnormal effect Effects 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 239000003990 capacitor Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/44—Parts or details or accessories of beverage-making apparatus
- A47J31/54—Water boiling vessels in beverage making machines
- A47J31/56—Water boiling vessels in beverage making machines having water-level controls; having temperature controls
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/44—Parts or details or accessories of beverage-making apparatus
- A47J31/58—Safety devices
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Apparatus For Making Beverages (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The invention provides a heating container control circuit, a heating container control method and a coffee machine. The heating container control circuit comprises a relay (1), a temperature controller (2), a heating element (3), a controller (4) and a detection circuit (5); the first end of the detection circuit (5) is connected between the temperature controller (2) and the heating element (3), the second end of the detection circuit (5) is connected with the signal input end (41) of the controller (4), and the first output end (42) of the controller (4) is connected with the relay; the detection circuit (5) is used for detecting a voltage signal of a circuit between the temperature controller (2) and the heating element (3) and transmitting the voltage signal to the controller (4), and the controller (4) is used for controlling the relay (1) to cut off the power supply of the heating element (3) when the voltage signal detected by the detection circuit (5) is abnormal. The invention can stop heating when the temperature controller works abnormally, thereby improving the safety performance.
Description
Technical Field
The invention relates to the field of household appliances, in particular to a heating container control circuit, a heating container control method and a coffee machine.
Background
With the continuous development of science and technology, more and more novel kitchen appliances such as coffee machines appear in the middle of people's life.
At present, a water tank and a heating element for heating water in the water tank are arranged in kitchen appliances such as coffee machines, and after the water in the water tank is boiled, the water can be used for making coffee or other drinks. In order to prevent the water in the water tank from being dried, a temperature controller is arranged in the coffee machine, when the water in the water tank is dried, the temperature can be rapidly increased, and after the temperature controller detects higher temperature, a control circuit is disconnected, so that the heating element stops heating.
However, when water scale is generated in the water tank or the temperature controller fails, the temperature controller may frequently trip or not trip, which causes abnormal operation of the whole machine and even potential safety hazard.
Disclosure of Invention
The invention provides a heating container control circuit, a heating container control method and a coffee machine, which can stop heating when a temperature controller works abnormally and improve the safety performance.
The invention provides a heating container control circuit, which comprises a relay, a temperature controller, a heating element, a controller and a detection circuit, wherein the relay is connected with the temperature controller;
the temperature controller, the heating element and the relay are all connected with the power supply in series, the first end of the detection circuit is connected between the temperature controller and the heating element, the second end of the detection circuit is connected with the signal input end of the controller, and the first output end of the controller is connected with the relay;
the detection circuit is used for detecting a voltage signal of a circuit between the temperature controller and the heating element and transmitting the voltage signal to the controller, and the controller is used for controlling the relay to cut off the power supply of the heating element when the voltage signal detected by the detection circuit is abnormal. Therefore, when the heating container is dried or the temperature controller works abnormally, the relay is controlled to be tripped off, so that the power supply of the heating element is cut off to stop heating, and the safety is high.
Optionally, the heating container control circuit further comprises an alarm; the alarm is connected with the second output end of the controller and used for giving an alarm when the voltage signal detected by the detection circuit is abnormal. Therefore, the user can be reminded when the temperature controller works abnormally.
Optionally, the detection circuit includes a voltage dividing resistor and a filter capacitor; the first end of the divider resistor is connected between the temperature controller and the heating element, and the second end of the divider resistor is connected with the first end of the detection circuit; the first end of the filter capacitor is connected with the first end of the detection circuit, and the second end of the filter capacitor is grounded.
Optionally, the alarm comprises a buzzer and/or an indicator light. The user can be alerted in a variety of different ways, such as by audio and light signals.
Optionally, the voltage signal of the circuit between the thermostat and the heating element is a square wave signal.
Optionally, the heating element is a heat-generating tube.
Optionally, the relay and the controller are both arranged on the control circuit board. This may improve the system integration within the heating vessel.
In another aspect, the invention provides a coffee maker comprising a water tank and a heating reservoir control circuit as described above, a heating element in the heating reservoir control circuit being adapted to heat liquid in the water tank.
In another aspect, the present invention provides a heating container control method, including:
judging whether a voltage signal of a circuit where a temperature controller is located in the heating container is abnormal or not according to a preset time threshold; when the voltage signal is abnormal, the heating element in the heating container is controlled to stop heating. Therefore, the working state of the temperature controller in the heating container can be detected, and the heating is stopped when the working state of the temperature controller is abnormal, so that potential safety hazards are avoided.
Optionally, when the voltage signal is abnormal, the heating container control method further comprises controlling an alarm to give an alarm. This may alert the user.
The construction of the present invention and other objects and advantages thereof will be more apparent from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating the operation of a control circuit for a heating vessel according to an embodiment of the present invention;
FIG. 2 is a detailed structural diagram of a control circuit of a heating container according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a heating container control method according to a third embodiment of the present invention.
Description of reference numerals:
1-a relay; 2-temperature controller; 3-a heating element; 4-a controller; 5-a detection circuit; 6, an alarm; 7-control circuit board; 61-a buzzer; 62-indicator light;
r1 — first resistance; r2 — second resistance; r3 — third resistor; r4 — fourth resistor; c1 — filter capacitance.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic diagram illustrating an operation principle of a control circuit for a heating container according to an embodiment of the present invention. Fig. 2 is a detailed structural schematic diagram of a heating container control circuit according to an embodiment of the present invention. As shown in fig. 1 and fig. 2, the heating container control circuit provided in this embodiment includes a relay 1, a thermostat 2, a heating element 3, a controller 4, and a detection circuit 5.
The temperature controller 2, the heating element 3 and the relay 1 are all connected with a power supply in series, the first end of the detection circuit 5 is connected between the temperature controller 2 and the heating element 3, the second end of the detection circuit 5 is connected with the signal input end 41 of the controller 4, and the first output end 42 of the controller 4 is connected with the relay 1.
The detection circuit 5 is used for detecting a voltage signal of a circuit between the temperature controller 2 and the heating element 3 and transmitting the voltage signal to the controller 4, and the controller 4 is used for controlling the relay 1 to cut off the power supply of the heating element 3 when the voltage signal detected by the detection circuit 5 is abnormal.
Specifically, the heating container of the present invention may include, but is not limited to, a coffee machine, an electric heating kettle, and other common household appliances, and the coffee machine is taken as an example for specific description. In the heating container, a temperature controller 2, a heating element 3 and a relay 1 are connected in series with a power supply to form a main heating circuit. The heating element 3 is normally adapted to heat water or other liquid in a container such as a water tank of a heating container, and the thermostat 2 is automatically turned off when an excessive temperature (e.g. 115 ℃) is sensed, so as to ensure that the heating element 3 does not dry out the water or other liquid in the water tank. Generally, the heating element 3 is a heating tube, and after the heating tube is electrified, a large amount of heat can be generated due to large self-resistance, so that the liquid in the water tank is heated.
For example, to avoid frequent or long-time intermittent tripping of the temperature controller 2 caused by water scale in the water tank or failure of the temperature controller 2 itself, the control circuit of the heating container further includes a detection circuit 5 and a controller 4, the detection circuit 5 can determine whether the temperature controller 2 is working normally by detecting a voltage signal of a circuit between the temperature controller 2 and the heating element 3, for example, when the temperature controller 2 is tripped in a short time (e.g. less than 30 seconds) or is tripped frequently and closed to turn on, it can be said that there is no water in the water tank or the operating state of the temperature controller 2 is abnormal, at this time, the corresponding voltage signal will also present an abnormal waveform. The controller 4 may control whether the relay 1 is tripped according to whether the voltage signal is abnormal. When the voltage signal is abnormal, the relay 1 is controlled to be tripped off, so that the power supply of the heating element 3 is cut off, and the heating is stopped.
Generally, the voltage signal of the circuit between the temperature controller 2 and the heating element 3 is generally a square wave signal, the square wave signal has a fixed frequency, when the temperature controller 2 is tripped, the square wave signal is changed into a low level signal, and the detection circuit 5 can determine the high/low level state of the voltage signal.
In addition, optionally, in order to remind the user of the abnormal operation of the temperature controller 2, the heating container control circuit may further include an alarm 6; an alarm 6 is connected to the second output 43 of the controller 4, the alarm 6 being operable to generate an alarm in the event of an abnormality in the voltage signal detected by the detection circuit 5. The alarm 6 comprises one or more of a buzzer 61 and an indicator light 62, which may alert the user in a number of different ways, such as by audible and light signals.
In order to ensure the accuracy and stability of the detected voltage signal, the detection circuit 5 comprises a voltage dividing resistor and a filter capacitor C1; the first end of the divider resistor is connected between the temperature controller 2 and the heating element 3, and the second end of the divider resistor is connected with the first end of the detection circuit 5; the first terminal of the filter capacitor C1 is connected to the first terminal of the detection circuit 5, and the second terminal of the filter capacitor C1 is grounded. The voltage dividing resistor may specifically include a first resistor R1, a second resistor R2, and a fourth resistor R4 connected in series with the controller 4, and a third resistor R3 connected in parallel with the controller 4, and the voltage dividing resistor may be capable of reducing the voltage at the pin of the controller 4 to meet the voltage requirement of the pin of the controller 4, for example, where R1 ═ R2 ═ 510K ohms, R3 ═ 30K ohms, and R4 ═ 4.7K ohms. And the filter capacitor C1 can filter the current in the circuit, and ensure that the voltage signal in the detection circuit 5 has a good waveform.
Optionally, the relay 1 and the controller 4 are both disposed on the same circuit board, such as the control circuit board 7, to improve the internal integration of the heating container control circuit.
In this embodiment, the heating container control circuit includes a relay, a temperature controller, a heating element, a controller, and a detection circuit; the temperature controller, the heating element and the relay are all connected with the power supply in series, the first end of the detection circuit is connected between the temperature controller and the heating element, the second end of the detection circuit is connected with the input end of the controller, and the first output end of the controller is connected with the relay; the detection circuit is used for detecting a voltage signal of a circuit between the temperature controller and the heating element and transmitting the voltage signal to the controller, and the controller is used for controlling the relay to cut off the power supply of the heating element when the voltage signal detected by the detection circuit is abnormal. Therefore, the heating can be stopped when the working state of the temperature controller is abnormal, and potential safety hazards are avoided.
In addition, the second embodiment of the present invention further provides a coffee maker, which includes a water tank and the heating container control circuit as described in the first embodiment, wherein the heating element in the heating container control circuit is used for heating the liquid in the water tank. This makes it possible to heat a liquid such as water in the water tank and perform a subsequent beverage preparation process such as coffee using the heated water. The structure and the operation principle of the heating container control circuit have been described in detail in the foregoing embodiments, and are not described herein again.
In this embodiment, the coffee maker comprises a water tank and a heating container control circuit, wherein the heating container control circuit comprises a relay, a temperature controller, a heating element, a controller and a detection circuit; the temperature controller, the heating element and the relay are all connected with the power supply in series, the first end of the detection circuit is connected between the temperature controller and the heating element, the second end of the detection circuit is connected with the input end of the controller, and the first output end of the controller is connected with the relay; the detection circuit is used for detecting a voltage signal of a circuit between the temperature controller and the heating element and transmitting the voltage signal to the controller, and the controller is used for controlling the relay to cut off the power supply of the heating element when the voltage signal detected by the detection circuit is abnormal. Therefore, the heating can be stopped when the working state of the temperature controller in the coffee machine is abnormal, and potential safety hazards are avoided.
Fig. 3 is a schematic flow chart of a heating container control method according to a third embodiment of the present invention. The heating container control method provided in this embodiment can be applied to the heating container control circuit in the first embodiment and the household kitchen appliance such as the coffee maker in the second embodiment. As shown in fig. 3, the method for controlling a heating container provided in this embodiment specifically includes:
s101, judging whether a voltage signal of a circuit where a temperature controller is located in a heating container is abnormal or not according to a preset time threshold;
specifically, the preset time threshold may be set according to a specific heating condition of the heating container, for example, during heating, the temperature controller is in a closed and connected state when the temperature reaches a certain value, for example, below 115 ℃, and at this time, the voltage signal is a square wave signal; when the temperature reaches above 115 ℃, the temperature controller will be tripped off, and the voltage signal is reduced to low level. Generally, since the conventional heating time in the heating container is several minutes, the voltage signal of the temperature controller is generally kept as a square wave signal during heating, and is converted into a low-level signal after several minutes, so that in a normal state, the voltage signal is generally a square wave signal within several minutes, and is converted into a low-level signal after several minutes; when the water tank is in a water-free state due to the existence of water scale, the temperature controller is likely to be tripped after heating for a short time (generally about 30 seconds), and at the moment, the voltage signal is converted from a square wave signal to a low level signal; when the thermostat fails, it may be a square wave signal for a long time. Thus, whether the voltage signal is normal or abnormal can be determined according to the preset time threshold. When the voltage signal changes within a time threshold which is too short, or the voltage signal does not change within a time threshold which is maintained for a long time, the voltage signal is an abnormal signal.
And S102, when the voltage signal is abnormal, controlling the heating element in the heating container to stop heating.
When the voltage signal is an abnormal signal, the heating element can be controlled to stop heating, so that the heating container is prevented from being dried or other potential safety hazards are avoided.
Further, optionally, when the voltage signal is abnormal, the method further comprises controlling an alarm to give an alarm so that a user is informed of an abnormal state of the heating container.
In this embodiment, the method for controlling the heating container specifically includes determining whether a voltage signal of a circuit in which a temperature controller is located in the heating container is abnormal according to a preset time threshold; and when the voltage signal is abnormal, controlling the heating element in the heating container to stop heating. Therefore, the working state of the temperature controller in the heating container can be detected, and the heating and the alarming are stopped when the working state of the temperature controller is abnormal, so that potential safety hazards are avoided.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A heating container control circuit is characterized by comprising a relay (1), a temperature controller (2), a heating element (3), a controller (4) and a detection circuit (5);
the temperature controller (2), the heating element (3) and the relay (1) are all connected with a power supply in series, a first end of the detection circuit (5) is connected between the temperature controller (2) and the heating element (3), a second end of the detection circuit (5) is connected with a signal input end (41) of the controller (4), and a first output end (42) of the controller (4) is connected with the relay;
the detection circuit (5) is used for detecting a voltage signal of a circuit between the temperature controller (2) and the heating element (3) and transmitting the voltage signal to the controller (4), the controller (4) is used for controlling the relay (1) to disconnect the power supply of the heating element (3) when the voltage signal detected by the detection circuit (5) is abnormal, wherein the voltage signal of the circuit between the temperature controller (2) and the heating element (3) is a square wave signal.
2. The heated vessel control circuit of claim 1, further comprising: an alarm (6); the alarm (6) is connected with a second output end (43) of the controller (4), and the alarm (6) is used for giving an alarm when the voltage signal detected by the detection circuit (5) is abnormal.
3. The heating vessel control circuit according to claim 1, characterized in that the detection circuit (5) comprises a voltage dividing resistor and a filter capacitor; the first end of the voltage dividing resistor is connected between the temperature controller (2) and the heating element (3), and the second end of the voltage dividing resistor is connected with the first end of the detection circuit (5); the first end of the filter capacitor is connected with the first end of the detection circuit (5), and the second end of the filter capacitor is grounded.
4. A heating vessel control circuit according to claim 2, characterized in that the alarm (6) comprises a buzzer (61) and/or an indicator light (62).
5. A heating vessel control circuit according to any of claims 1-4, characterized in that the heating element (3) is a heat generating tube.
6. A heating vessel control circuit according to any of claims 1-4, characterized in that the relay (1) and the controller (4) are both arranged on a control circuit board (7).
7. A coffee machine comprising a water tank and a heating reservoir control circuit as claimed in any one of claims 1 to 6, a heating element in the heating reservoir control circuit being adapted to heat liquid in the water tank.
8. A method of controlling a heating vessel, comprising:
judging whether a voltage signal of a circuit where a temperature controller is located in a heating container is abnormal or not according to a preset time threshold, wherein the voltage signal is a square wave signal;
and when the voltage signal is abnormal, controlling a heating element in the heating container to stop heating.
9. The heating container control method according to claim 8, further comprising, when the voltage signal is abnormal: and controlling the alarm to give an alarm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610863981.1A CN107874625B (en) | 2016-09-29 | 2016-09-29 | Heating container control circuit, heating container control method and coffee machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610863981.1A CN107874625B (en) | 2016-09-29 | 2016-09-29 | Heating container control circuit, heating container control method and coffee machine |
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| CN107874625A CN107874625A (en) | 2018-04-06 |
| CN107874625B true CN107874625B (en) | 2020-05-05 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108814493B (en) * | 2018-06-06 | 2021-06-01 | 九阳股份有限公司 | Dry-burning-resistant dish-washing machine |
| CN109028256B (en) * | 2018-07-16 | 2021-10-01 | 珠海格力电器股份有限公司 | Heating equipment and control device and method thereof |
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| CN2633156Y (en) * | 2003-08-06 | 2004-08-18 | 邵志成 | Electric liquid heater with alarm |
| CN1953621A (en) * | 2006-11-03 | 2007-04-25 | 程三望 | A temperature controller of electric heating pot |
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