CN210417667U - Constant temperature control circuit for condensation sheet and moisture-proof box for controlling condensation sheet to keep constant temperature - Google Patents
Constant temperature control circuit for condensation sheet and moisture-proof box for controlling condensation sheet to keep constant temperature Download PDFInfo
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- CN210417667U CN210417667U CN201921129883.0U CN201921129883U CN210417667U CN 210417667 U CN210417667 U CN 210417667U CN 201921129883 U CN201921129883 U CN 201921129883U CN 210417667 U CN210417667 U CN 210417667U
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Abstract
The utility model provides a condensation piece thermostatic control circuit and control condensation piece keep homothermal dampproofing case, condensation piece thermostatic control circuit includes signal reduction circuit, voltage comparator, condensation piece driver and temperature sensing device, signal reduction circuit is used for acquireing the condensation piece on-off control signal that upper device sent and converts it into on-off control voltage, and its output is connected to an input of voltage comparator, another input of voltage comparator with temperature sensing device connects, and voltage comparator's output is connected to the condensation piece driver, the output of condensation piece driver is connected to the condensation piece. The moisture-proof box for controlling the condensation sheet to keep constant temperature comprises a moisture-proof box controller, the condensation sheet, a heat radiation body, a cold radiation body and the condensation sheet constant temperature control circuit.
Description
Technical Field
The utility model relates to a dampproofing dehumidification technique in the box, concretely relates to control condensation piece keeps homothermal dampproofing case.
Background
Traditional dampproofing case that utilizes low temperature condensation dehumidification principle to realize removing tide, the temperature of its condensation piece is lower, and the speed that removes tide is just faster, and the mode of control condensation piece temperature has two kinds on being applied to dampproofing case at present: the other is open-loop control, whether the controller is through the work of sending switching signal control condensation piece, utilizes the fin size change heat dissipation power of condensation piece to adjust condensation piece operating temperature, the control mode of this kind of condensation piece is subject to operational environment temperature, and when ambient temperature reduced, condensation piece temperature also will reduce, freezes even, reduces except that the damp effect. The other is software closed-loop control, namely, the temperature of the condensing sheet is returned to the controller through a temperature sensor or a thermistor, and then the controller sends a control signal to change the working current of the condensing sheet and adjust the condensing sheet.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem mentioned among the background art, the utility model provides a condensation piece thermostatic control circuit and control condensation piece keep homothermal dampproofing case, its concrete technical content as follows:
the utility model provides a condensation piece thermostatic control circuit, its includes signal reduction circuit, voltage comparator, condensation piece driver and temperature sensing device, signal reduction circuit is used for acquireing the condensation piece on-off control signal that upper device sent and converts it into on-off control voltage, and its output is connected to an input of voltage comparator, another input of voltage comparator with temperature sensing device connects, and the output of voltage comparator is connected to the condensation piece driver, the output of condensation piece driver is connected to the condensation piece.
In one or more embodiments of the present invention, the positive phase input terminal of the voltage comparator is connected to the temperature sensing device to obtain the feedback voltage reflecting the temperature variation, and the negative phase input terminal thereof is connected to the signal restoring circuit to obtain the switching control voltage.
In one or more embodiments of the present invention, the temperature sensing device is a thermistor.
The utility model provides a control condensation piece keeps homothermal dampproofing case, its includes dampproofing case controller, condensation piece, radiator, the cold body and foretell condensation piece thermostatic control circuit that looses, the condensation piece is installed on the box of dampproofing case, and its one side that is located outside the box is connected with the radiator, its one side that is located the box is connected with the cold body that looses, dampproofing case controller is connected with condensation piece thermostatic control circuit, and it is according to setting for the condensation piece on-off control signal that sends control condensation piece and start/stop.
In one or more embodiments of the present invention, the temperature sensing device is hidden in the cooling body.
In the middle of one or more embodiments of the utility model, dampproofing case controller is equipped with or is connected with humidity and sets up the module, the box outside is located to humidity setting module, and it provides a plurality of operation key positions that are used for the setting of incasement humidity parameter.
The utility model has the advantages that: a hardware closed-loop temperature control mode is provided, a moisture-proof box controller generates a condensing sheet on-off control signal according to setting, the condensing sheet on-off control signal is converted into on-off control voltage by a signal reduction circuit, the on-off control voltage is a voltage value corresponding to the thermistor in a certain temperature range (such as 0-4 ℃), the voltage value is compared with real-time feedback voltage of the thermistor to generate comparison output, and the start/stop work of the condensing sheet is driven, so that the condensing sheet can be stably cooled to 0-4 ℃ and does not change along with the ambient temperature, and the moisture-proof box controller is particularly suitable for stable operation at relatively low ambient temperature. The utility model discloses a control by temperature change directly realizes with the physical circuit, low cost such as thermistor, voltage comparator, stable performance have the technical and the practicality of preferred.
Drawings
Fig. 1 is a schematic diagram of the device architecture of the present invention.
Fig. 2 is a flow chart of the working principle of the present invention.
Detailed Description
The application scheme is further described below with reference to the accompanying drawings:
referring to fig. 1, the constant temperature control circuit for the condensation sheet comprises a signal reduction circuit 1, a voltage comparator 2, a condensation sheet driver 3 and a thermistor 4, wherein the signal reduction circuit 1 is used for acquiring a condensation sheet switching control signal sent by an upper device and converting the condensation sheet switching control signal into a switching control voltage, an output end of the signal reduction circuit 1 is connected to a negative phase input end of the voltage comparator 2, a positive phase input end of the voltage comparator 2 is connected with the thermistor 4 to acquire a feedback voltage reflecting temperature change, an output end of the voltage comparator 2 is connected to the condensation sheet driver 3, and an output end of the condensation sheet driver 3 is connected to a condensation sheet 5.
The utility model provides a control condensation piece keeps homothermal dampproofing case, its includes dampproofing case controller 6, condensation piece 5, radiator 7, the cold body 8 and foretell condensation piece thermostatic control circuit that looses, condensation piece 5 is installed on the box of dampproofing case, and its one side that is located outside the box is connected with radiator 7 (the fin promptly for outside heat dissipation), its one side that is located the box is connected with the cold body 8 that looses (the cold piece that looses promptly for increase area of contact improves refrigeration efficiency), dampproofing case controller 6 is connected with condensation piece thermostatic control circuit, and it sends the condensation piece on-off control signal that control condensation piece 5 opened/stopped according to setting for, and positive temperature coefficient's thermistor 4 is hidden and is located in the cold body 8 that looses. The moisture-proof box controller 6 is provided with or connected with a humidity setting module, the humidity setting module is arranged on the outer side of the box body, and a plurality of operation key positions for setting humidity parameters in the box body are provided, and the operation key positions can be specifically buttons, knobs or touch screens.
Referring to fig. 2, after the moisture-proof box is powered on, a user sets a proper humidity value through a humidity setting module according to the characteristics of articles stored in the moisture-proof box, the moisture-proof box controller 6 is connected with a plurality of humidity sensors arranged in the box, when the humidity value in the box body is detected to exceed the humidity value set by a user, the moisture-proof box controller 6 generates a condensing sheet switch control signal and sends the condensing sheet switch control signal to the signal restoring circuit 1, the output of the signal restoring circuit 1 is a voltage value corresponding to a temperature value, for example, since the condensing sheet has an efficient dehumidifying effect at 0-4 deg.c, therefore, the voltage value corresponding to the thermistor 4 with any temperature of 0-4 ℃ is selected as the switch control voltage (equivalent to a fixed value) output by the signal restoring circuit 1, when the signal reduction circuit 1 receives a control signal of a condensing sheet switch of the moisture-proof box controller 6, the signal reduction circuit immediately outputs a switch control voltage with a fixed value; because the thermistor 4 is selected according to the design temperature, when the temperature on the heat radiation body 8 is higher than the set value of the temperature of the condensation sheet, such as 0 ℃ and 2 ℃, the resistance value of the thermistor 4 is increased, the feedback voltage is increased, and the voltage comparator 2 outputs a high level after comparing the switch control voltage with the feedback voltage of the thermistor 4, so that the condensation sheet driver 3 is started to drive the condensation sheet 4 to work and continuously cool; when the temperature of the heat radiation body 8 reaches the set temperature value of the condensation sheet, the feedback voltage of the thermistor 4 is consistent with or lower than the switch control voltage, and at the moment, the voltage comparator 2 outputs a low level to turn off the condensation sheet driver 3 so as to stop the condensation sheet 4 from working; after the stop work, the temperature of condensation piece 5 can rise gradually, when the temperature is higher than condensation piece temperature setting value, condensation piece driver 3, condensation piece 5 begin work again, when condensation piece 5 temperature drops to condensation piece temperature setting value, condensation piece driver 3, condensation piece 5 stop work again, so the circulation is repeated, make condensation piece 5 keep in certain temperature range, even steady operation under the optimal temperature 0-4 ℃ scope, operating temperature does not receive ambient temperature to influence. After condensation piece thermostatic control circuit more than the application, the problem that the dampproofing case can not influence dehumidification effect or even can't work because the condensation piece freezes. The voltage comparator 2 and the thermistor 4 are relatively cheap electronic components, the connecting circuit is simple, the production cost is reduced, and meanwhile, the stability is improved.
The above preferred embodiments should be considered as examples of the embodiments of the present application, and technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present patent.
Claims (6)
1. The utility model provides a condensation piece thermostatic control circuit which characterized in that: including signal reduction circuit, voltage comparator, condensation piece driver and temperature sensing device, signal reduction circuit is used for acquireing the condensation piece on-off control signal that the upper device sent and converts it into on-off control voltage, and its output is connected to an input of voltage comparator, another input of voltage comparator with temperature sensing device connects, and the output of voltage comparator is connected to the condensation piece driver, the output of condensation piece driver is connected to the condensation piece.
2. A cold plate thermostat control circuit according to claim 1, wherein: the positive phase input end of the voltage comparator is connected with the temperature sensing device to obtain feedback voltage reflecting temperature change, and the negative phase input end of the voltage comparator is connected with the signal restoring circuit to obtain the switch control voltage.
3. A cold plate thermostat control circuit according to claim 1 or 2, characterized in that: the temperature sensing device is a thermistor.
4. The utility model provides a control condensation piece keeps homothermal dampproofing case which characterized in that: the condensation piece constant temperature control circuit comprises a moisture-proof box controller, a condensation piece, a heat radiation body, a cooling radiation body and the condensation piece constant temperature control circuit as claimed in any one of claims 1 to 3, wherein the condensation piece is installed on a box body of the moisture-proof box, one side of the condensation piece, which is positioned outside the box body, is connected with the heat radiation body, one side of the condensation piece, which is positioned inside the box body, is connected with the cooling radiation body, the moisture-proof box controller is connected with the condensation piece constant temperature control circuit, and the moisture-proof box controller sends out a condensation piece on-off control.
5. The moisture-proof box for controlling the condensation sheet to maintain a constant temperature according to claim 4, wherein: the temperature sensing device is hidden in the cooling radiator.
6. The moisture-proof box for controlling the condensation sheet to maintain a constant temperature according to claim 4, wherein: the dampproofing case controller is equipped with or is connected with humidity and sets up the module, the humidity sets up the module and locates the box outside, and it provides a plurality of operation key positions that are used for the setting of incasement humidity parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921129883.0U CN210417667U (en) | 2019-07-18 | 2019-07-18 | Constant temperature control circuit for condensation sheet and moisture-proof box for controlling condensation sheet to keep constant temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921129883.0U CN210417667U (en) | 2019-07-18 | 2019-07-18 | Constant temperature control circuit for condensation sheet and moisture-proof box for controlling condensation sheet to keep constant temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210417667U true CN210417667U (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921129883.0U Active CN210417667U (en) | 2019-07-18 | 2019-07-18 | Constant temperature control circuit for condensation sheet and moisture-proof box for controlling condensation sheet to keep constant temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210417667U (en) |
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2019
- 2019-07-18 CN CN201921129883.0U patent/CN210417667U/en active Active
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