CN113238592A - Temperature control device and temperature control method - Google Patents
Temperature control device and temperature control method Download PDFInfo
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- CN113238592A CN113238592A CN202110573639.9A CN202110573639A CN113238592A CN 113238592 A CN113238592 A CN 113238592A CN 202110573639 A CN202110573639 A CN 202110573639A CN 113238592 A CN113238592 A CN 113238592A
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- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/22—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element being a thermocouple
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Abstract
The embodiment of the invention discloses a temperature control device and a temperature control method. This temperature regulating device includes: the temperature controller comprises a temperature receiving end, a first action control end and a second action control end; the first controlled switch comprises a first controlled end, a first control end and a second control end, the first controlled end is connected with the first action control end, the first controlled end is used for receiving a control signal sent by the first action control end, and the first controlled switch is used for controlling the connection or disconnection of the electric connection between the first control end and the second control end according to the control signal; the second controlled switch comprises a second controlled end, a third control end and a fourth control end, the second controlled end is connected with the second action control end, and the second controlled end is used for receiving a control signal sent by the second action control end and controlling the connection between the third control end and the fourth control end to be switched on or off; the first controlled switch, the second controlled switch, the heater and the external power supply are connected in series. The embodiment of the invention greatly improves the reliability of the temperature control device.
Description
Technical Field
The embodiment of the invention relates to a temperature control technology, in particular to a temperature control device and a temperature control method.
Background
With the development of technology, temperature control devices have become indispensable automatic control devices for various apparatuses.
The existing temperature control device comprises a temperature controller, and the temperature to be detected is monitored through the temperature controller. When the temperature to be measured is higher than the preset temperature, the temperature controller provides current for the input loop of the relay, the controlled device disconnects the power supply connection of the heating pipe, and heating is stopped.
However, in practical use, it is often found that the current cannot be supplied correctly to the individual ports of the thermostat, so that the relay cannot normally cut off the power supply of the heating tube. Thereby causing the heated object to be over-heated and damaged and causing waste.
Disclosure of Invention
The invention provides a temperature control device and a temperature control method, which are used for stably controlling a heater to heat an object to be heated. The reliability of the temperature control device is greatly improved, and the loss caused by damage due to overhigh temperature of the heated object is greatly reduced.
In a first aspect, an embodiment of the present invention provides a temperature control device, including:
the temperature controller comprises a temperature receiving end, a first action control end and a second action control end;
the first controlled switch comprises a first controlled end, a first control end and a second control end, the first controlled end is connected with the first action control end, the first controlled end is used for receiving a control signal sent by the first action control end, and the first controlled switch is used for controlling the connection or disconnection of the electric connection between the first control end and the second control end according to the control signal;
the second controlled switch comprises a second controlled end, a third control end and a fourth control end, the second controlled end is connected with the second action control end, and the second controlled end is used for receiving a control signal sent by the second action control end and controlling the connection or disconnection of the electric connection between the third control end and the fourth control end;
the first controlled switch, the second controlled switch, the heater and the external power supply are connected in series;
the temperature controller is configured to determine a control signal of a first controlled switch sent by the first action control end according to the real-time temperature value received by the temperature receiving end, and when the real-time temperature value is larger than the highest value of a preset temperature threshold, the temperature controller sends a first control signal through the first action control end to disconnect the first control end and the second control end; when the real-time temperature value is smaller than the lowest value of the preset temperature threshold value, the temperature controller sends a second control signal through the first action control end so as to conduct the first control end and the second control end.
Optionally, the temperature controller is further configured to determine a control signal of a second controlled switch sent by the second action control end according to the real-time temperature value received by the temperature receiving end, and when the real-time temperature value is greater than a maximum value of a preset temperature threshold, the temperature controller sends a third control signal through the second action control end to disconnect the third control end and the fourth control end; and when the real-time temperature value is smaller than the lowest value of the preset temperature threshold value, the temperature controller sends a fourth control signal through the second action control end so as to conduct the third control end and the fourth control end.
Optionally, the temperature controller is further configured to determine a control signal of the second controlled switch sent by the second action control end according to the real-time temperature value received by the temperature receiving end, and when the real-time temperature value exceeds the warning temperature value, the temperature controller sends a third control signal through the second action control end to disconnect the third control end and the fourth control end.
Optionally, the control signal of the first controlled switch includes a voltage signal or a current signal.
Optionally, the first controlled switch or the second controlled switch comprises a relay.
Optionally, the relay comprises a solid state relay.
Optionally, the first controlled switch includes a MOS transistor or an IGBT transistor, and the second controlled switch includes a MOS transistor or an IGBT transistor.
In a second aspect, an embodiment of the present invention further provides a temperature control method, implemented by any one of the temperature control devices, including:
the temperature controller obtains a real-time temperature value and judges the size relation between the real-time temperature value and a preset temperature threshold value;
when the real-time temperature value is larger than the maximum value of the preset temperature threshold value, the first controlled switch controls the first control end and the second control end to be disconnected, and the second controlled switch controls the third control end and the fourth control end to be disconnected;
when the real-time temperature value is smaller than the lowest value of the preset temperature threshold value, the first controlled switch controls the first control end to be conducted with the second control end, and the second controlled switch controls the third control end to be conducted with the fourth control end.
In a third aspect, an embodiment of the present invention further provides a temperature control device, including:
the temperature controller comprises a temperature receiving end and a third action control end;
the third controlled switch comprises a third controlled end, a fifth control end and a sixth control end, the third controlled end is connected with the third action control end, the fifth control end is connected with the input end of the controller, and the sixth control end is connected with an external direct-current power supply or grounded;
the temperature controller is configured to obtain a real-time temperature value received by the temperature receiving end, when the real-time temperature value exceeds an alarm temperature value, the temperature controller sends a fifth control signal through the third action control end, the third controlled switch controls the connection or disconnection of the electrical connection between the fifth control end and the sixth control end according to the fifth control signal so as to form a sixth control signal at the fifth control end, and the controller is used for controlling the heater to stop heating according to the sixth control signal input by the input end of the controller.
In a fourth aspect, an embodiment of the present invention further provides a temperature control method, implemented by the above temperature control device, including:
the temperature controller obtains a real-time temperature value and judges whether the real-time temperature value exceeds an alert temperature value or not;
when the real-time temperature value exceeds the warning temperature value, the third controlled switch sends a sixth control signal by switching on or off the fifth control end and the sixth control end;
and the controller controls the heater to stop heating according to the received sixth control signal.
The temperature control device provided by the embodiment of the invention comprises a temperature controller, wherein the temperature controller comprises a temperature receiving end, a first action control end and a second action control end; the first controlled switch comprises a first controlled end, a first control end and a second control end, the first controlled end is connected with the first action control end, the first controlled end is used for receiving a control signal sent by the first action control end, and the first controlled switch is used for controlling the connection or disconnection of the electric connection between the first control end and the second control end according to the control signal; the second controlled switch comprises a second controlled end, a third control end and a fourth control end, the second controlled end is connected with the second action control end, and the second controlled end is used for receiving a control signal sent by the second action control end and controlling the connection or disconnection of the electric connection between the third control end and the fourth control end; the first controlled switch, the second controlled switch, the heater and the external power supply are connected in series.
The temperature controller is configured to determine a control signal of a first controlled switch sent by the first action control end according to the real-time temperature value received by the temperature receiving end, and when the real-time temperature value is larger than the highest value of a preset temperature threshold, the temperature controller sends a first control signal through the first action control end to disconnect the first control end and the second control end; when the real-time temperature value is smaller than the lowest value of the preset temperature threshold value, the temperature controller sends a second control signal through the first action control end so as to conduct the first control end and the second control end. The second controlled switch is additionally arranged on the basis that the temperature controller controls the first controlled switch, so that when one controlled switch is not normally switched off, the heating circuit is switched off by the other controlled switch. The reliability of the temperature control device is greatly improved, and unnecessary waste caused by damage of the heated object due to overhigh temperature is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a temperature control device according to an embodiment of the present invention;
fig. 2 is another schematic structural diagram of a temperature control device according to an embodiment of the present invention;
FIG. 3 is a flow chart of a temperature control method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another temperature control device according to an embodiment of the present invention;
FIG. 5 is a schematic view of another structure of another temperature control device according to an embodiment of the present invention;
fig. 6 is a flowchart of another temperature control method according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a temperature control device according to an embodiment of the present invention, and refer to fig. 1. The embodiment of the invention provides a temperature control device, which comprises:
the temperature controller 1 comprises a temperature receiving end (not shown in the figure), a first action control end 11 and a second action control end 12; the first controlled switch 2 comprises a first controlled end 21, a first control end 22 and a second control end 23, the first controlled end 21 is connected with the first action control end 11, the first controlled end 21 is used for receiving a control signal sent by the first action control end 11, and the first controlled switch 2 is used for controlling the connection or disconnection of the electrical connection between the first control end 22 and the second control end 23 according to the control signal; the second controlled switch 3 comprises a second controlled terminal 31, a third control terminal 32 and a fourth control terminal 33, the second controlled terminal 31 is connected to the second action control terminal 12, the second controlled terminal 31 is used for receiving a control signal sent by the second action control terminal 12 and controlling the connection or disconnection of the electrical connection between the third control terminal 32 and the fourth control terminal 33; wherein, the first controlled switch 2, the second controlled switch 3, the heater 4 and the external power supply 5 are connected in series; the temperature controller 1 is configured to determine a control signal of the first controlled switch 2 sent by the first action control terminal 11 according to the real-time temperature value received by the temperature receiving terminal, and when the real-time temperature value is greater than the maximum value of the preset temperature threshold, the temperature controller 1 sends a first control signal through the first action control terminal 11 to disconnect the first control terminal 22 and the second control terminal 23; when the real-time temperature value is smaller than the lowest value of the preset temperature threshold, the temperature controller 1 sends a second control signal through the first motion control terminal 11 to connect the first control terminal 22 and the second control terminal 23.
Wherein the control signal of the first controlled switch 2 may comprise a first control signal and a second control signal. The thermostat 1 may be any device for temperature control, for example, an ohm dragon E5CC-QX2ASM-800 thermostat. The preset temperature threshold comprises a highest value and a lowest value, and can be set according to actual needs. The real-time temperature value can be determined by the temperature data received by the temperature receiving end of the temperature controller 1. The temperature receiving end may be coupled to a temperature sensor that may be positioned proximate to the heated object to generate temperature data. The temperature data is data that can reflect the temperature of the object to be heated. The temperature sensor may be a thermocouple.
The series connection sequence among the first controlled switch 2, the second controlled switch 3, the heater 4 and the external power source 5 may be any sequence, and the connection sequence and the position relationship of the four components are not limited in the embodiment of the present invention. Wherein the first controlled switch 2 can be connected to the above-mentioned series-connected circuit via a first control terminal 22 and a second control terminal 23; the second controlled switch 3 may be connected to the above-mentioned series-connected circuit via a third control terminal 32 and a fourth control terminal 33. The external power supply 5 may be a dc power supply or an ac power supply. The first controlled switch 2 and the second controlled switch 3 are controlled by the thermostat 1, and the on or off of the control end of the first controlled switch 2 and the on or off of the control end of the second controlled switch 3 can be determined according to the control signal sent by the thermostat 1. The embodiment of the present invention is not limited to specific types of the first controlled switch 2 or the second controlled switch 3, and all devices capable of satisfying the above functions can be used as the first controlled switch 2 or the second controlled switch 3. And a specific type of the first controlled switch 2 or the second controlled switch 3 will be described below.
Alternatively, the first controlled switch 2 or the second controlled switch 3 may comprise a relay. One of the input ports of the relay may be connected to the first operation control terminal 11 as the first controlled terminal 21 or to the second operation control terminal 12 as the second controlled terminal 31. The other terminal of the input ports of the relay may be connected to a direct current power supply.
When the relay is a normally open relay, the thermostat 1 sets the first action control end 11 and the second action control end 12 to be in an open-drain output state when the first controlled switch 2 and the second controlled switch 3 are required to be switched on, so that current flows through a coil between input ports of the relay. The normally open contact of the relay between the first control end 22 and the second control end 23 is closed, the contact of the relay between the third control end 32 and the fourth control end 33 is closed, and the external power supply 5 drives the heating pipe to heat. When the first controlled switch 2 or the second controlled switch 3 needs to be turned off, the temperature controller 1 sets the first action control terminal 11 or the second action control terminal 12 to be in a floating state, so that current cannot flow through the coil between the input ports of the relay. The relay contact between the first control terminal 22 and the second control terminal 23 is opened, or the relay contact between the third control terminal 32 and the fourth control terminal 33 is opened, and the heating tube stops heating.
When the relay is a normally closed relay, the thermostat 1 sets the first motion control terminal 11 and the second motion control terminal 12 in a suspended state when the first controlled switch 2 and the second controlled switch 3 need to be turned on, so that current cannot flow through a coil between input ports of the relay. The normally closed contact of the relay between the first control end 22 and the second control end 23 is closed, the contact of the relay between the third control end 32 and the fourth control end 33 is closed, and the external power supply 5 drives the heating tube to heat. When the first controlled switch 2 or the second controlled switch 3 needs to be turned off, the temperature controller 1 sets the first operation control terminal 11 or the second operation control terminal 12 to an open-drain output state so that current flows through the coil between the input ports of the relay. The relay contact between the first control terminal 22 and the second control terminal 23 is opened, or the relay contact between the third control terminal 32 and the fourth control terminal 33 is opened, and the heating tube stops heating.
When the relay is used as the first controlled switch 2, the output ports of the relay can be used as a first control terminal 22 and a second control terminal 23; when the relay is used as the second controlled switch 3, the output ports of the relay can be used as the third control terminal 32 and the fourth control terminal 33. The first control signal or the second control signal received as a relay for the first controlled switch 2 may be a current signal. Wherein the relay may comprise a solid state relay.
Fig. 2 is another schematic structural diagram of a temperature control device according to an embodiment of the present invention, referring to fig. 2. Optionally, the first controlled switch 2 may include a MOS transistor (also called a mosfet) or an IGBT transistor (also called an IGBT). The second controlled switch 3 may comprise a MOS transistor or an IGBT transistor. The gate of the MOS transistor or the IGBT transistor may be connected to the first operation control terminal 11 as the first controlled terminal 21, or connected to the second operation control terminal 12 as the second controlled terminal 31. The source electrode of the MOS transistor or the IGBT transistor may be used as the first control terminal 22 or the third control terminal 32, and the drain electrode of the MOS transistor or the IGBT transistor may be used as the second control terminal 23 or the fourth control terminal 33; or, the source of the MOS transistor or the IGBT transistor is used as the second control terminal 23 or the fourth control terminal 33, and the drain of the MOS transistor or the IGBT transistor is used as the first control terminal 22 or the third control terminal 32. The first control signal or the second control signal received by the MOS transistor or the IGBT transistor as the first controlled switch 2 may be a voltage signal.
The control signal of the first controlled switch 2 may comprise a voltage signal or a current signal. The embodiment of the present invention is not limited to the signal type of the control signal of the first controlled switch 2.
The temperature controller 1 controls the second controlled switch 3 to avoid damage caused by excessively high temperature of the heated object when the heater 4 heats the heated object, and the embodiment of the present invention is not limited to the control of the temperature controller 1 on the second controlled switch 3, and two control methods thereof will be described below. The embodiment of the invention is provided with two controlled switches which can be respectively controlled to control the working state of the heater 4, so that when one controlled switch is not normally switched off, the other controlled switch can switch off the heating circuit. The reliability of the temperature control device is greatly improved, and unnecessary waste caused by damage of the heated object due to overhigh temperature is avoided.
In other embodiments, the thermostat 1 is further configured to determine a control signal of the second controlled switch 3 sent by the second action control terminal 12 according to the real-time temperature value received by the temperature receiving terminal, and when the real-time temperature value is greater than the highest value of the preset temperature threshold, the thermostat 1 sends a third control signal through the second action control terminal 12 to disconnect the third control terminal 32 and the fourth control terminal 33; when the real-time temperature value is smaller than the lowest value of the preset temperature threshold, the temperature controller 1 sends a fourth control signal through the second motion control terminal 12 to connect the third control terminal 32 and the fourth control terminal 33.
Wherein the control signal of the second controlled switch 3 may comprise a third control signal and a fourth control signal. When the second controlled switch 3 is a relay, the third control signal or the fourth control signal received as a relay of the second controlled switch 3 may be a current signal; when the second controlled switch 3 is a MOS transistor or an IGBT transistor, the third control signal or the fourth control signal received by the MOS transistor or the IGBT transistor as the second controlled switch 3 may be a voltage signal. The control signal of the second controlled switch 3 may thus comprise a voltage signal or a current signal. The embodiment of the present invention is not limited to the signal type of the control signal of the second controlled switch 3.
In other embodiments, the thermostat 1 is further configured to determine the control signal of the second controlled switch 3 sent by the second motion control terminal 12 according to the real-time temperature value received by the temperature receiving terminal, and when the real-time temperature value exceeds the alarm temperature value, the thermostat 1 sends a third control signal through the second motion control terminal 12 to disconnect the third control terminal 32 and the fourth control terminal 33.
The warning temperature value can be higher than a preset temperature threshold value, and the value of the warning temperature value can be determined according to actual needs. When the real-time temperature value exceeds the warning temperature value, the connection between the third control terminal 32 and the fourth control terminal 33 in the second controlled switch 3 is cut off, so that damage caused by continuous heating of the heated object can be avoided, and meanwhile, high conducting or breaking action loss of the two switches caused by simultaneous conducting or breaking of the first controlled switch 2 and the second controlled switch 3 is avoided. Thus further improving the reliability of the temperature control device.
Fig. 3 is a flowchart of a temperature control method according to an embodiment of the present invention, referring to fig. 3. The embodiment of the invention also discloses a temperature control method, which is realized by any one of the temperature control devices and comprises the following steps:
s11, the temperature controller obtains a real-time temperature value and judges the size relation between the real-time temperature value and a preset temperature threshold value;
s12, when the real-time temperature value is larger than the maximum value of the preset temperature threshold value, the first controlled switch controls the first control end and the second control end to be disconnected, and the second controlled switch controls the third control end and the fourth control end to be disconnected; when the real-time temperature value is smaller than the lowest value of the preset temperature threshold value, the first controlled switch controls the first control end to be conducted with the second control end, and the second controlled switch controls the third control end to be conducted with the fourth control end.
The heated object can be in the range of the preset temperature threshold value by the control method of switching off the circuit when the real-time temperature value is greater than the highest value of the preset temperature threshold value and switching on the circuit when the real-time temperature value is less than the lowest value of the preset temperature threshold value.
Fig. 4 is a schematic structural diagram of another temperature control device according to an embodiment of the present invention, referring to fig. 4. The embodiment of the invention also discloses a temperature control device, which comprises:
the temperature controller 1 comprises a temperature receiving end (not shown in the figure) and a third action control end 13;
the third controlled switch 6 comprises a third controlled end 61, a fifth control end 62 and a sixth control end 63, the third controlled end 61 is connected with the third action control end 13, the fifth control end 62 is connected with the input end of the controller 7, and the sixth control end 63 is connected with an external direct current power supply or the ground;
the temperature controller 1 is configured to obtain a real-time temperature value received by the temperature receiving terminal, when the real-time temperature value exceeds an alarm temperature value, the temperature controller 1 sends a fifth control signal through the third motion control terminal 13, the third controlled switch 6 controls the electrical connection between the fifth control terminal 62 and the sixth control terminal 63 to be switched on or off according to the fifth control signal, so as to form a sixth control signal at the fifth control terminal 62, and the controller 7 is configured to control the heater 4 to stop heating according to the sixth control signal input at the input terminal of the controller 7.
The controller 7 may be any device capable of logically controlling the heater 4 according to the received signal, and the embodiment of the present invention is not limited to a specific model or configuration thereof. The thermostat 1 may be any one of the devices for temperature control, for example, an ohm dragon E5CC-QX2ASM-800 thermostat 1. The value of the warning temperature value can be determined according to actual needs. The real-time temperature value can be determined by the temperature data received by the temperature receiving end of the temperature controller 1. The temperature receiving end can be connected with a temperature sensor. A temperature sensor may be placed near the heated object to generate temperature data. The temperature data is data that can reflect the temperature of the object to be heated. The temperature sensor may be a thermocouple. The fifth control signal may be a voltage signal or a current signal.
Alternatively, the third controlled switch 6 may comprise a relay. One of the input ports of the relay may be connected to the third operation control terminal 13 as a third controlled terminal 61, and the other input port of the relay may be connected to a dc power supply. The output ports of the relay may serve as a fifth control terminal 62 and a sixth control terminal 63.
Fig. 5 is another schematic structural diagram of another temperature control device according to an embodiment of the present invention, referring to fig. 5. Optionally, the third controlled switch 6 may include a MOS transistor or an IGBT transistor. The gate of the MOS transistor or the IGBT may be connected to the third operation control terminal 13 as a third controlled terminal 61, the source of the MOS transistor or the IGBT may be used as a fifth control terminal 62, and the drain of the MOS transistor or the IGBT may be used as a sixth control terminal 63; or the source of the MOS transistor or the IGBT transistor is used as the sixth control terminal 63, and the drain of the MOS transistor or the IGBT transistor is used as the fifth control terminal 62.
Optionally, the sixth control terminal 63 is connected to an external dc power supply, and when the third controlled switch 6 receives the fifth control signal, the fifth control terminal 62 and the sixth control terminal 63 can be controlled to be electrically connected. Due to the conduction between the fifth control terminal 62 and the sixth control terminal 63, the fifth control terminal 62 is communicated with the external dc power source, and the fifth control terminal 62 can provide a high-level signal (i.e. a high-voltage signal) or a high-current signal as the sixth control signal to the input terminal of the controller 7. The controller 7 controls the heater 4 to stop heating according to the received sixth control signal.
Optionally, the sixth control terminal 63 is connected to an external dc power supply, and when the third controlled switch 6 receives the fifth control signal, the fifth control terminal 62 and the sixth control terminal 63 can be controlled to be electrically disconnected. Since the fifth control terminal 62 is disconnected from the sixth control terminal 63, the fifth control terminal 62 is disconnected from the external dc power supply, the voltage at the end of the fifth control terminal is zero, and the fifth control terminal 62 provides a low-level signal (i.e. a low-voltage signal) with zero voltage or a low-current signal with zero current as the sixth control signal to the input terminal of the controller 7. The controller 7 controls the heater 4 to stop heating according to the received sixth control signal.
Optionally, the sixth control terminal 63 is grounded, and when the third controlled switch 6 receives the fifth control signal, the fifth control terminal 62 and the sixth control terminal 63 can be controlled to be electrically connected. Due to the conduction between the fifth control terminal 62 and the sixth control terminal 63, the fifth control terminal 62 is grounded, and the fifth control terminal 62 provides a low-level signal (i.e., a low-voltage signal) or a high-current signal with zero voltage as the sixth control signal to the input terminal of the controller 7. The controller 7 controls the heater 4 to stop heating according to the received sixth control signal.
Optionally, the sixth control terminal 63 is grounded, and when the third controlled switch 6 receives the fifth control signal, the fifth control terminal 62 and the sixth control terminal 63 can be controlled to be electrically disconnected. Due to the disconnection between the fifth control terminal 62 and the sixth control terminal 63, the fifth control terminal 62 is floating, the voltage of the terminal thereof follows the voltage of the input terminal of the controller 7, and a high level signal (i.e., a high voltage signal) or a low current signal with zero current is maintained as the sixth control signal. The controller 7 controls the heater 4 to stop heating according to the received sixth control signal.
According to the embodiment of the invention, the alarm signal of the temperature controller 1 is transmitted to the controller 7 through the third controlled switch 6, so that the controller 7 stops heating of the heater 4, and damage caused by overhigh temperature of the heated object is avoided. Meanwhile, the compatibility problem between the controller 7 and the temperature controller 1 is solved, and the alarm signals can be smoothly transmitted between the controllers 7 and the temperature controllers 1 with different communication protocols.
Fig. 6 is a flowchart of another temperature control method according to an embodiment of the present invention, referring to fig. 6. The embodiment of the invention also provides a temperature control method, which is realized by the last temperature control device and comprises the following steps:
s21, the temperature controller obtains a real-time temperature value and judges whether the real-time temperature value exceeds an alert temperature value or not;
s22, when the real-time temperature value exceeds the warning temperature value, the third controlled switch sends a sixth control signal by switching on or off the fifth control end and the sixth control end;
and S23, the controller controls the heater to stop heating according to the received sixth control signal.
By the method, the heater can be stopped from heating when the real-time temperature value acquired by the temperature controller exceeds the warning temperature value, and damage caused by overhigh temperature of the heated object is avoided.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A temperature control device, comprising:
the temperature controller comprises a temperature receiving end, a first action control end and a second action control end;
the first controlled switch comprises a first controlled end, a first control end and a second control end, the first controlled end is connected with the first action control end, the first controlled end is used for receiving a control signal sent by the first action control end, and the first controlled switch is used for controlling the connection or disconnection of the electric connection between the first control end and the second control end according to the control signal;
the second controlled terminal is used for receiving a control signal sent by the second action control terminal and controlling the connection or disconnection of the electric connection between the third control terminal and the fourth control terminal;
the first controlled switch, the second controlled switch, the heater and the external power supply are connected in series;
the temperature controller is configured to determine a control signal of the first controlled switch sent by the first action control end according to a real-time temperature value received by the temperature receiving end, and when the real-time temperature value is greater than a maximum value of a preset temperature threshold, the temperature controller sends a first control signal through the first action control end to disconnect the first control end and the second control end; and when the real-time temperature value is smaller than the lowest value of the preset temperature threshold value, the temperature controller sends a second control signal through the first action control end so as to conduct the first control end and the second control end.
2. The temperature control device according to claim 1, wherein the thermostat is further configured to determine a control signal of the second controlled switch sent by the second action control terminal according to the real-time temperature value received by the temperature receiving terminal, and when the real-time temperature value is greater than a maximum value of the preset temperature threshold, the thermostat sends the third control signal through the second action control terminal to disconnect the third control terminal and the fourth control terminal; and when the real-time temperature value is smaller than the lowest value of the preset temperature threshold value, the temperature controller sends the fourth control signal through the second action control end so as to conduct the third control end and the fourth control end.
3. The temperature control device according to claim 1, wherein the temperature controller is further configured to determine a control signal of the second controlled switch sent by the second operation control terminal according to the real-time temperature value received by the temperature receiving terminal, and when the real-time temperature value exceeds an alarm temperature value, the temperature controller sends the third control signal through the second operation control terminal to disconnect the third control terminal and the fourth control terminal.
4. The temperature control device of claim 1, wherein the control signal of the first controlled switch comprises a voltage signal or a current signal.
5. The temperature control device of claim 1, wherein the first controlled switch or the second controlled switch comprises a relay.
6. The temperature control device of claim 5, wherein the relay comprises a solid state relay.
7. The temperature control device according to claim 1, wherein the first controlled switch comprises a MOS transistor or an IGBT transistor, and the second controlled switch comprises a MOS transistor or an IGBT transistor.
8. A method for controlling temperature, which is realized by the temperature control device according to any one of claims 1 to 7, comprising:
the temperature controller obtains a real-time temperature value and judges the size relation between the real-time temperature value and a preset temperature threshold value;
when the real-time temperature value is greater than the maximum value of the preset temperature threshold value, the first controlled switch controls the first control end and the second control end to be disconnected, and the second controlled switch controls the third control end and the fourth control end to be disconnected;
when the real-time temperature value is smaller than the lowest value of the preset temperature threshold value, the first controlled switch controls the first control end to be conducted with the second control end, and the second controlled switch controls the third control end to be conducted with the fourth control end.
9. A temperature control device, comprising:
the temperature controller comprises a temperature receiving end and a third action control end;
the third controlled switch comprises a third controlled end, a fifth control end and a sixth control end, the third controlled end is connected with the third action control end, the fifth control end is connected with the input end of the controller, and the sixth control end is connected with an external direct-current power supply or the ground;
the temperature controller is configured to obtain a real-time temperature value received by the temperature receiving terminal, and when the real-time temperature value exceeds an alert temperature value, the temperature controller sends a fifth control signal through the third action control terminal, the third controlled switch controls the on/off of the electrical connection between the fifth control terminal and the sixth control terminal according to the fifth control signal, so as to form a sixth control signal at the fifth control terminal, and the controller is configured to control the heater to stop heating according to the sixth control signal input at the input terminal of the controller.
10. A method for controlling temperature, which is realized by the temperature control device according to claim 9, comprising:
the temperature controller obtains a real-time temperature value and judges whether the real-time temperature value exceeds an alert temperature value or not;
when the real-time temperature value exceeds the warning temperature value, the third controlled switch sends a sixth control signal by switching on or off the fifth control end and the sixth control end;
and the controller controls the heater to stop heating according to the received sixth control signal.
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Application publication date: 20210810 |