CN215864559U - Dry overheat detection device - Google Patents
Dry overheat detection device Download PDFInfo
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- CN215864559U CN215864559U CN202122496009.4U CN202122496009U CN215864559U CN 215864559 U CN215864559 U CN 215864559U CN 202122496009 U CN202122496009 U CN 202122496009U CN 215864559 U CN215864559 U CN 215864559U
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Abstract
The utility model provides a drying overheat detection device, comprising: the first controller is used for receiving the control signal, sending the control signal to the heating circuit and controlling a heater in the heating circuit to operate; the second output end of the first controller is connected with the input end of the drying circuit, and the first controller is used for receiving a control signal, synchronously sending the control signal to the drying circuit and controlling a drying fan in the drying circuit to operate; the feedback end of the drying circuit is connected with the second input end of the first controller, and the drying circuit is used for sending the running state of the drying fan to the first controller. The running state of the fan is judged by acquiring the running state of the drying fan in the drying circuit in real time, so that the heating circuit is forced to be turned off to heat when the fan breaks down, and danger caused by overheating is avoided.
Description
Technical Field
The utility model relates to the technical field of household appliance drying, in particular to a drying overheat detection device.
Background
Drying is the removal of liquids from solid materials or articles, and drying techniques are widely used in everyday life and in industrial manufacturing. Among them, the drying of tableware is one of the indispensable life scenes in people's daily life. In the tableware drying process, the aim of quick drying can be achieved by matching a PTC (positive temperature coefficient) or other heaters with a fan generally. However, whether the fan is turned on or off depends on whether the fan is overheated or not. When the heater is started, the fan is synchronously started, and temperature overheating is restrained while rapid drying is carried out.
However, due to the lack of overheat protection for the drying device, when the heater is turned on, the fan is not started synchronously, which may cause overheat, and after the temperature is overheated, the heater may continue to heat, which may cause danger, such as equipment burnout, even fire, etc.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the present invention is to overcome the defect of lack of overheat protection for the drying device in the prior art, and to provide a drying overheat detection device.
In order to achieve the purpose, the utility model provides the following technical scheme:
the embodiment of the utility model provides a drying overheat detection device, which comprises: the drying device comprises a first controller, a heating circuit and a drying circuit, wherein a first input end of the first controller is externally connected with a control signal, a first output end of the first controller is connected with an input end of the heating circuit, and the first controller is used for receiving the control signal, sending the control signal to the heating circuit and controlling a heater in the heating circuit to operate; the second output end of the first controller is connected with the input end of the drying circuit, and the first controller is used for receiving a control signal, synchronously sending the control signal to the drying circuit and controlling a drying fan in the drying circuit to operate; the feedback end of the drying circuit is connected with the second input end of the first controller, and the drying circuit is used for sending the running state of the drying fan to the first controller.
Optionally, the heating circuit comprises: heater, drive circuit and relay, wherein, drive circuit's input with the first output of first controller is connected, drive circuit's output with the one end of relay coil is connected, the external first power supply of the other end of relay coil, the external alternating current power supply's of one end of relay normally open switch L phase line, the other end of relay normally open switch with the second end of heater is connected, the external alternating current power supply's of the first end of heater N phase line, the earthing terminal ground connection of heater, the external first power supply of the power end of heater.
Optionally, the heating circuit further comprises: the driving circuit comprises a first resistor and a first capacitor, wherein one end of the first resistor is connected with a first output end of the first controller, and the other end of the first resistor is connected with an input end of the driving circuit; one end of the first capacitor is connected with a power supply end of the heater, and the other end of the first capacitor is grounded.
Optionally, the drying circuit includes: the drying fan, the first controllable switch, the second controllable switch and the second resistor are arranged on the drying fan, wherein the base electrode of the first controllable switch is connected with the second output end of the first controller, the collector electrode of the first controllable switch is respectively connected with the control end of the second controllable switch and one end of the second resistor, and the emitter electrode of the first controllable switch is grounded; the other end of the second resistor is externally connected with a first power supply; the first end of the second controllable switch is externally connected with a first power supply, and the second end of the second controllable switch is connected with the first end of the drying fan; and the second end of the drying fan is grounded, and the third end of the drying fan is connected with the second input end of the first controller.
Optionally, the drying circuit further includes: one end of the third resistor is connected with the second output end of the first controller, and the other end of the third resistor is connected with the base electrode of the first controllable switch; one end of the fourth resistor is connected with the third end of the drying fan, and the other end of the fourth resistor is connected with the second input end of the first controller.
Optionally, the first controller is a single chip microcomputer.
Optionally, the first controllable switch is a triode, which is of type S8050.
Optionally, the second controllable switch is a field effect transistor.
The technical scheme of the utility model has the following advantages:
the utility model provides a drying overheat detection device, comprising: the first controller is used for receiving the control signal, sending the control signal to the heating circuit and controlling a heater in the heating circuit to operate; the second output end of the first controller is connected with the input end of the drying circuit, and the first controller is used for receiving a control signal, synchronously sending the control signal to the drying circuit and controlling a drying fan in the drying circuit to operate; the feedback end of the drying circuit is connected with the second input end of the first controller, and the drying circuit is used for sending the running state of the drying fan to the first controller. The running state of the fan is judged by acquiring the running state of the drying fan in the drying circuit in real time, so that the heating circuit is forced to be turned off to heat when the fan breaks down, and danger caused by overheating is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic block diagram of a specific example of a drying overheat detection apparatus according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a specific example of the drying overheat detection means in the embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
An embodiment of the present invention provides a drying overheat detection apparatus, as shown in fig. 1, including: the drying device comprises a first controller 1, a heating circuit 2 and a drying circuit 3, wherein a first input end of the first controller 1 is externally connected with a control signal, a first output end of the first controller 1 is connected with an input end of the heating circuit 2, the first controller 1 is used for receiving the control signal, sending the control signal to the heating circuit 2 and controlling a heater in the heating circuit 2 to operate; the second output end of the first controller 1 is connected with the input end of the drying circuit 3, the first controller 1 is used for receiving a control signal, synchronously sending the control signal to the drying circuit 3 and controlling the operation of a drying fan in the drying circuit 3; the feedback end of the drying circuit 3 is connected with the second input end of the first controller 1, and the drying circuit 3 is used for sending the running state of the drying fan to the first controller 1.
In an embodiment, when the bowl is to be dried, the drying device is first selectively turned on by a key or the like, and the drying function is set, at this time, a control signal for drying the bowl is sent to the first controller 1, the first controller 1 controls the heater in the heating circuit 2 to be turned on for heating, and the drying fan in the drying circuit 3 is controlled to operate for air drying and cooling. Wherein the heater and the drying fan are not shown in fig. 1. Further, in the drying process, the first controller 1 monitors whether the drying fan normally operates in real time according to the operation state of the drying fan fed back by the drying circuit 3. When the drying fan does not normally operate, a heating stopping signal is sent to the heating circuit 2 in real time to prevent overheating and damage to the kitchen ware and the drying device. In the embodiment of the utility model, the first controller 1 is a single chip microcomputer U4, the single chip microcomputer U4 adopts an existing mature single chip microcomputer, and an existing mature control program is arranged in the single chip microcomputer.
The utility model provides a drying overheat detection device, comprising: the first controller is used for receiving the control signal, sending the control signal to the heating circuit and controlling a heater in the heating circuit to operate; the second output end of the first controller is connected with the input end of the drying circuit, and the first controller is used for receiving a control signal, synchronously sending the control signal to the drying circuit and controlling a drying fan in the drying circuit to operate; the feedback end of the drying circuit is connected with the second input end of the first controller, and the drying circuit is used for sending the running state of the drying fan to the first controller. The running state of the fan is judged by acquiring the running state of the drying fan in the drying circuit in real time, so that the heating circuit is forced to be turned off to heat when the fan breaks down, and danger caused by overheating is avoided.
In one embodiment, as shown in fig. 2, the heating circuit 2 includes: heater P17, drive circuit U5 and relay K1, wherein, the input of drive circuit U5 is connected with the first output of first controller 1, the output of drive circuit U5 is connected with the one end of relay K1 coil, the external first power supply of the other end of relay K1 coil, the external alternating current power supply's of one end L looks line of relay K1 normally open switch, the other end of relay K1 normally open switch is connected with the second end of heater P17, the external alternating current power supply's of first end N looks line of heater P17, the ground terminal of heater P17 is ground, the external first power supply of power end of heater P17.
In one embodiment, as shown in fig. 2, the heating circuit 2 further includes: a first resistor R1 and a first capacitor C1, wherein one end of the first resistor R1 is connected to the first output terminal of the first controller 1, and the other end of the first resistor R1 is connected to the input terminal of the driving circuit; one end of the first capacitor C1 is connected to the power supply terminal of the heater P17, and the other end of the first capacitor C1 is grounded.
In the embodiment of the utility model, when the driving circuit U5 receives a starting heating signal sent by the singlechip U4, the heating signal is converted into a corresponding voltage signal and is transmitted to the coil of the relay K1, so that a power supply loop of the coil of the relay K1 is switched on, the coil of the relay K1 is electrified, and a normally-open switch of the relay K1 is closed. Further, the power supply circuit of the heater P17 was turned on, the ac power supply supplied the heater P17, and the heater P17 started to operate and heat. The driving circuit U5 adopts a large-current driving array with the model number of ULN 2003.
In one embodiment, as shown in fig. 2, the drying circuit 3 includes: the drying fan P8, the first controllable switch Q1, the second controllable switch Q2 and the second resistor R2, wherein the base of the first controllable switch Q1 is connected with the second output end of the first controller 1, the collector of the first controllable switch Q1 is respectively connected with the control end of the second controllable switch Q2 and one end of the second resistor R2, and the emitter of the first controllable switch Q1 is grounded; the other end of the second resistor R2 is externally connected with a first power supply; a first end of the second controllable switch Q2 is externally connected with a first power supply, and a second end of the second controllable switch Q2 is connected with a first end of the drying fan P8; the second end of the drying fan P8 is grounded, and the third end of the drying fan P8 is connected with the second input end of the first controller 1.
In an embodiment, as shown in fig. 2, the drying circuit 3 further includes: a third resistor R3 and a fourth resistor R4, wherein one end of the third resistor R3 is connected to the second output terminal of the first controller 1, and the other end of the third resistor R3 is connected to the base of the first controllable switch Q1; one end of the fourth resistor R4 is connected with the third end of the drying fan P8, and the other end of the fourth resistor R4 is connected with the second input end of the first controller 1.
In the embodiment of the utility model, when the single chip microcomputer U4 sends a heating starting signal to the drive circuit U5, the single chip microcomputer U4 also sends a drying starting signal to the drying circuit 3, so that the heater P17 and the drying fan P8 synchronously run, the aim of quick drying is achieved, and overheating is restrained. Specifically, when the single chip microcomputer U4 determines that the drying Fan P8 is sent to the driving circuit U5, the low level signal Fan for starting the drying Fan P8 is sent to the base of the first controllable switch Q1 through the third resistor R3, and the first controllable switch Q1 cannot be triggered to be turned on by the low level signal. Therefore, the external first power source forms a high level signal at the control end of the second controllable switch Q2 through the second resistor R2, so as to trigger the second controllable switch Q2 to be turned on, and the external 12V power source supplies power to the drying fan P8 through the second controllable switch Q2. The drying fan P8 and the heater P17 are operated synchronously, so that the purpose of quick drying is achieved, and overheating is suppressed.
At the moment, the drying fan P8 feeds back the running state of the drying fan P8 to the single chip microcomputer U4 through the third end in real time. The single chip microcomputer U4 monitors whether the drying fan normally operates in real time according to the operation state fed back by the drying fan P8. Specifically, when the single chip microcomputer U4 receives a square wave signal fed back by the drying fan P8, it is determined that the drying fan P8 is operating normally, and at this time, the original operating state is maintained. When the single chip microcomputer U4 receives a high level signal fed back by the drying fan P8, the drying fan P8 is judged to be out of order and cannot run, a forced-off heating signal is generated at the moment, and the signal is sent to the driving circuit U5, so that the driving heater P17 is driven to stop heating, and overheating caused by fan failure cannot be carried out is avoided. In the embodiment of the present invention, the first controllable switch Q1 is a triode, whose model number is S8050. The second controllable switch Q2 is a field effect transistor.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the utility model may be made without departing from the spirit or scope of the utility model.
Claims (8)
1. A dryness overheat detection apparatus, comprising: a first controller, a heating circuit and a drying circuit, wherein,
a first input end of the first controller is externally connected with a control signal, a first output end of the first controller is connected with an input end of the heating circuit, and the first controller is used for receiving the control signal, sending the control signal to the heating circuit and controlling a heater in the heating circuit to operate;
the second output end of the first controller is connected with the input end of the drying circuit, and the first controller is used for receiving a control signal, synchronously sending the control signal to the drying circuit and controlling a drying fan in the drying circuit to operate;
the feedback end of the drying circuit is connected with the second input end of the first controller, and the drying circuit is used for sending the running state of the drying fan to the first controller.
2. The dry overheat detection apparatus according to claim 1, wherein the heating circuit comprises: a heater, a driving circuit and a relay, wherein,
the input of drive circuit with the first output of first controller is connected, drive circuit's output with the one end of relay coil is connected, the external first power supply of the other end of relay coil, the external alternating current power supply's of one end L phase line of relay normally open switch, the other end of relay normally open switch with the second end of heater is connected, the external alternating current power supply's of the first end N phase line of heater, the earthing terminal ground connection of heater, the external first power supply of power end of heater.
3. The dry overheat detection apparatus according to claim 2, wherein the heating circuit further comprises: a first resistor and a first capacitor, wherein,
one end of the first resistor is connected with a first output end of the first controller, and the other end of the first resistor is connected with an input end of the driving circuit;
one end of the first capacitor is connected with a power supply end of the heater, and the other end of the first capacitor is grounded.
4. The drying overheat detection apparatus according to claim 1, wherein the drying circuit comprises: a drying fan, a first controllable switch, a second controllable switch and a second resistor, wherein,
the base electrode of the first controllable switch is connected with the second output end of the first controller, the collector electrode of the first controllable switch is respectively connected with the control end of the second controllable switch and one end of the second resistor, and the emitter electrode of the first controllable switch is grounded;
the other end of the second resistor is externally connected with a first power supply;
the first end of the second controllable switch is externally connected with a first power supply, and the second end of the second controllable switch is connected with the first end of the drying fan;
and the second end of the drying fan is grounded, and the third end of the drying fan is connected with the second input end of the first controller.
5. The drying overheat detection apparatus according to claim 4, wherein the drying circuit further comprises: a third resistor and a fourth resistor, wherein,
one end of the third resistor is connected with the second output end of the first controller, and the other end of the third resistor is connected with the base electrode of the first controllable switch;
one end of the fourth resistor is connected with the third end of the drying fan, and the other end of the fourth resistor is connected with the second input end of the first controller.
6. The drying overheat detection apparatus according to claim 2, wherein the first controller is a single chip microcomputer.
7. The dryness-overheat detection apparatus according to claim 4, wherein the first controllable switch is a triode type S8050.
8. The drying overheat detection apparatus according to claim 4, wherein the second controllable switch is a field effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122496009.4U CN215864559U (en) | 2021-10-15 | 2021-10-15 | Dry overheat detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122496009.4U CN215864559U (en) | 2021-10-15 | 2021-10-15 | Dry overheat detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215864559U true CN215864559U (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122496009.4U Active CN215864559U (en) | 2021-10-15 | 2021-10-15 | Dry overheat detection device |
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| CN (1) | CN215864559U (en) |
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- 2021-10-15 CN CN202122496009.4U patent/CN215864559U/en active Active
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