CN111330059A - USB interface low pressure champignon heater - Google Patents
USB interface low pressure champignon heater Download PDFInfo
- Publication number
- CN111330059A CN111330059A CN202010241859.7A CN202010241859A CN111330059A CN 111330059 A CN111330059 A CN 111330059A CN 202010241859 A CN202010241859 A CN 202010241859A CN 111330059 A CN111330059 A CN 111330059A
- Authority
- CN
- China
- Prior art keywords
- voltage
- resistor
- current
- operational amplifier
- semiconductor device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 241000222519 Agaricus bisporus Species 0.000 title description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 title description 2
- 239000004065 semiconductor Substances 0.000 claims abstract description 51
- 238000000222 aromatherapy Methods 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 17
- 230000007423 decrease Effects 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- 230000005669 field effect Effects 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/015—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
- A61L9/02—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air by heating or combustion
- A61L9/03—Apparatus therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
- A61L2209/10—Apparatus features
- A61L2209/11—Apparatus for controlling air treatment
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The invention relates to the technical field of aromatherapy machine heaters, in particular to a USB interface low-voltage aromatherapy heater which comprises an active semiconductor device Q1, a control voltage CURRENT REF, an operational amplifier U1-A and a temperature control unit, wherein the CURRENT of the control voltage CURRENT REF is divided and then input into the positive electrode of the operational amplifier U1-A, the active semiconductor device Q1 is connected with a CURRENT sampling resistor R3, the electric signal of the CURRENT sampling resistor R3 is input into the negative electrode of the operational amplifier U1-A through a negative feedback input resistor R6, a resistor R2 is connected between the operational amplifier U1-A and the active semiconductor device Q1, and a negative feedback input resistor R10 is connected between the resistor R2 and the negative feedback input resistor R6 in parallel. The invention makes the active semiconductor device Q1 present different impedance by controlling the current or voltage of the control electrode of the active semiconductor device Q1, thereby adjusting the working current and realizing the purpose of low-voltage constant temperature control.
Description
Technical Field
The invention relates to the technical field of aromatherapy machine heaters, in particular to a low-voltage aromatherapy heater with a USB interface.
Background
At present, heating elements such as common chip resistors, ceramic film resistors, PTC and the like are used in the heating part of the common aromatherapy heater. The common patch resistor has low heat conduction efficiency and large power consumption; although the ceramic film resistor has high thermal efficiency, the temperature control detection circuit cannot be integrated with the ceramic film resistor, so that the conditions of poor temperature detection and control reliability and low temperature control precision exist; the PTC heating device is adopted, although the PTC can be automatically kept at a constant temperature, the conduction resistance of the PTC is increased along with the increase of the temperature, the current is large at low temperature, the heating power becomes smaller and smaller due to the fact that the resistance is increased and the current is reduced when the temperature is increased, the heating speed is low, and the low-voltage aromatherapy heater with the USB interface is difficult to achieve under the conditions of low voltage and limited current, so that the USB interface low-voltage aromatherapy heater is provided for solving the problems.
Disclosure of Invention
The invention aims to solve the defects that the temperature detection and control reliability of the existing aromatherapy temperature control detection circuit is poor, the temperature control precision is low, the heating speed of a heating device is low, and constant temperature control is difficult to realize under the conditions of low voltage and limited current in the prior art, and provides a USB interface low-voltage aromatherapy heater.
In order to achieve the purpose, the invention adopts the following technical scheme:
a designed low-voltage aromatherapy heater with a USB interface comprises an active semiconductor device Q1, a control voltage CURRENT REF, an operational amplifier U1-A and a temperature control unit, wherein the patch is arranged on an aluminum substrate, the active semiconductor device Q1 is externally connected with a power supply voltage VCC through a lead, the CURRENT of the control voltage CURRENT REF is divided by a resistor R4 and a resistor R5 and then input into the anode of the operational amplifier U1-A, the active semiconductor device Q1 is connected with a CURRENT sampling resistor R3, the CURRENT sampling resistor R3 is grounded, two ends of the CURRENT sampling resistor R3 are connected with a negative feedback input resistor R6, the electric signal of the CURRENT sampling resistor R3 is input into the cathode of the operational amplifier U1-A through the negative feedback input resistor R6, a resistor R2 is connected between the operational amplifier U1-A and the active semiconductor device Q1, and a negative feedback input resistor R10 is arranged between the resistor R2 and the negative feedback input resistor R6 in parallel.
Preferably, the temperature control unit includes a temperature detection unit TEMP CHECK, and a resistor R9 and a negative temperature coefficient thermistor (NTC) R1 connected in parallel to the temperature detection unit TEMP CHECK, the resistor R9 is connected to the power supply voltage VCC through a wire, the negative temperature coefficient thermistor (NTC) R1 is grounded, when the temperature of the active semiconductor device Q1 rises, the negative temperature coefficient thermistor (NTC) R1 is heated to cause a change in internal CURRENT, the voltage of the temperature detection unit TEMP CHECK drops, and the voltage at the temperature detection unit TEMP CHECK is read by the single chip microcomputer, so that the voltage at the CURRENT REF end is controlled in real time to realize constant temperature control.
Preferably, the output terminal of the temperature detection unit TEMP CHECK is also connected to the positive input terminal of an operational amplifier U1-B, the negative input terminal of the operational amplifier U1-B is connected to a reference voltage TEMP REF divided by a resistor R7 and a resistor R8, when the temperature of the active semiconductor device Q1 increases, the resistance of a negative temperature coefficient thermistor (NTC) R1 decreases, the voltage of the temperature detection unit TEMP CHECK decreases, which causes the voltage of the positive terminal of the operational amplifier U1-B to decrease, when the negative input voltage of the operational amplifier U1-B is higher than the positive input voltage, the voltage of a control voltage CURRENT REF connected to the output terminal of the operational amplifier U1-B decreases, and when the operating CURRENT of the active semiconductor device Q1 decreases, the heating power decreases, and the temperature decreases; on the contrary, when the temperature is reduced, the working current of the active semiconductor device Q1 is increased, the heating power is increased, the temperature is increased, the constant temperature control is realized, and the constant value of the temperature can be adjusted by adjusting the voltage at the TEMP REF end.
Preferably, the power supply voltage VCC is supplied by a USB interface of a computer, a mobile phone charger, a mobile power supply, or other power adapters.
Preferably, the active semiconductor device Q1 is a semiconductor element such as a transistor or a field effect transistor.
Preferably, the operational amplifier U1-A can be replaced by a comparator.
The low-voltage aromatherapy heater with the USB interface has the beneficial effects that: according to the invention, the active semiconductor device Q1 is pasted on the aluminum substrate, the advantage of fast heat conduction of the aluminum substrate is utilized, the current or the voltage of the control electrode of the active semiconductor device Q1 is controlled to enable the active semiconductor device Q1 to present different impedances, so that the working current is adjusted, the active semiconductor device Q1 does not generate heat when no current exists, the heat is increased when the current is increased, the current and the voltage of the semiconductor control electrode are adjusted through a single chip microcomputer or an operational amplifier and a comparator to realize the constant current, the constant power and the constant temperature of the circuit, the heating speed is fast, the temperature control precision is high, the maximum power taking power is automatically limited so as to adapt to various different power supply environments, the power supply equipment of a user is not damaged, and due to the use of the existing power supply device of the user, a power.
Drawings
FIG. 1 is a circuit diagram of a USB interface low-voltage aromatherapy heater according to the present invention;
FIG. 2 is a circuit diagram of an operational amplifier U1-B according to the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments.
The first embodiment is as follows:
referring to fig. 1, the low-voltage aromatherapy heater with the USB interface comprises an active semiconductor device Q1, a control voltage CURRENT REF, an operational amplifier U1-a and a temperature control unit, wherein the patch is arranged on an aluminum substrate, the control voltage CURRENT REF is used for controlling the CURRENT, the operational amplifier U1-a can be replaced by a comparator, the active semiconductor device Q1 is externally connected with a power supply voltage VCC through a wire, the power supply voltage VCC is supplied by a USB interface of a computer, a mobile phone charger, a mobile power supply and the like or other power adapters, and the active semiconductor device Q1 is a semiconductor element such as a triode, a field effect transistor and the like.
The CURRENT of the control voltage CURRENT REF is divided by a resistor R4 and a resistor R5 and then input to the anode of an operational amplifier U1-A, an active semiconductor device Q1 is connected with a CURRENT sampling resistor R3, a CURRENT sampling resistor R3 is arranged in a grounding mode, two ends of the CURRENT sampling resistor R3 are connected with a negative feedback input resistor R6, the electric signal of the CURRENT sampling resistor R3 is input to the cathode of the operational amplifier U1-A through a negative feedback input resistor R6, a resistor R2 is connected between the operational amplifier U1-A and the active semiconductor device Q1, a negative feedback input resistor R10 is connected between the resistor R2 and the negative feedback input resistor R6 in parallel, when the working current is increased, the current flowing through the current sampling resistor R3 is increased, the voltage at two ends of the R3 is increased, the current is input to the negative electrode of the comparator or the operational amplifier U1-A through the R6, the output voltage of the U1-A is reduced, and the working current of the Q1 is reduced; when the working current of the Q1 is reduced, the voltage of the negative electrode of the comparator or the operational amplifier U1-A is reduced, the output voltage of the U1-A is increased, and the working current of the Q1 is increased, so that the constant current or constant power control is realized. When the voltage of the CURRENT _ REF end is 0V, the output of U1-A is 0V, the CURRENT flowing through Q1 is closed, the circuit stops heating, and when the control voltage of the CURRENT REF comes from the output of the adjustable single chip microcomputer DA, dynamic power and CURRENT modulation can be achieved.
The temperature control unit comprises a temperature detection unit TEMP CHECK, a resistor R9 and a negative temperature coefficient thermistor (NTC) R1 which are connected in parallel to the temperature detection unit TEMP CHECK, the resistor R9 is externally connected with a power supply voltage VCC through a wire, the negative temperature coefficient thermistor (NTC) R1 is arranged in a grounding mode, when the temperature of the active semiconductor device Q1 rises, the negative temperature coefficient thermistor (NTC) R1 is heated to cause internal CURRENT change, the voltage of the temperature detection unit TEMP CHECK drops, the voltage at the temperature detection unit TEMP CHECK end is read by combining a single chip microcomputer, and the voltage at the CURRENT terminal is controlled in real time to realize constant temperature control.
Example two:
referring to fig. 1-2, a low-voltage aromatherapy heater with a USB interface comprises an active semiconductor device Q1, a control voltage CURRENT REF, an operational amplifier U1-a and a temperature control unit, wherein the patch is arranged on an aluminum substrate, the control voltage CURRENT REF is used for controlling the CURRENT, the operational amplifier U1-a can be replaced by a comparator, the active semiconductor device Q1 is externally connected with a power supply voltage VCC through a wire, the power supply voltage VCC is supplied by a USB interface of a computer, a mobile phone charger, a mobile power supply and the like or other power adapters, and the active semiconductor device Q1 is a semiconductor element such as a triode or a field effect transistor.
The CURRENT of the control voltage CURRENT REF is divided by a resistor R4 and a resistor R5 and then input to the anode of an operational amplifier U1-A, an active semiconductor device Q1 is connected with a CURRENT sampling resistor R3, a CURRENT sampling resistor R3 is arranged in a grounding mode, two ends of the CURRENT sampling resistor R3 are connected with a negative feedback input resistor R6, the electric signal of the CURRENT sampling resistor R3 is input to the cathode of the operational amplifier U1-A through a negative feedback input resistor R6, a resistor R2 is connected between the operational amplifier U1-A and the active semiconductor device Q1, a negative feedback input resistor R10 is connected between the resistor R2 and the negative feedback input resistor R6 in parallel, when the working current is increased, the current flowing through the current sampling resistor R3 is increased, the voltage at two ends of the R3 is increased, the current is input to the negative electrode of the comparator or the operational amplifier U1-A through the R6, the output voltage of the U1-A is reduced, and the working current of the Q1 is reduced; when the working current of the Q1 is reduced, the voltage of the negative electrode of the comparator or the operational amplifier U1-A is reduced, the output voltage of the U1-A is increased, and the working current of the Q1 is increased, so that the constant current or constant power control is realized. When the voltage of the CURRENT _ REF end is 0V, the output of U1-A is 0V, the CURRENT flowing through Q1 is closed, the circuit stops heating, and when the control voltage of the CURRENT REF comes from the output of the adjustable single chip microcomputer DA, dynamic power and CURRENT modulation can be achieved.
The temperature control unit comprises a temperature detection unit TEMP CHECK, a resistor R9 and a negative temperature coefficient thermistor (NTC) R1 which are connected in parallel with the temperature detection unit TEMP CHECK, the resistor R9 is externally connected with a power supply voltage VCC through a lead, the negative temperature coefficient thermistor (NTC) R1 is grounded, the output end of the temperature detection unit TEMP CHECK is connected with the positive input end of an operational amplifier U1-B, the negative input end of the operational amplifier U1-B is connected with a reference voltage TEMPREF divided by a resistor R7 and a resistor R8, when the temperature of the active semiconductor device Q1 rises, the resistance of the negative temperature coefficient thermistor (NTC) R1 is reduced, the voltage of the temperature detection unit TEMP CHECK is reduced, the voltage of the positive electrode of the operational amplifier U1-B is reduced, and when the negative input voltage of the positive electrode U1-B is higher than the input voltage, the voltage of the control voltage CURRENT connected with the output end of the operational amplifier U1-B is, at the moment, the working current of the active semiconductor device Q1 is reduced, the heating power is reduced, and the temperature is reduced; on the contrary, when the temperature is reduced, the working current of the active semiconductor device Q1 is increased, the heating power is increased, the temperature is increased, the constant temperature control is realized, and the constant value of the temperature can be adjusted by adjusting the voltage at the TEMP REF end.
According to the invention, the active semiconductor device Q1 is pasted on the aluminum substrate, the advantage of fast heat conduction of the aluminum substrate is utilized, the current or the voltage of the control electrode of the active semiconductor device Q1 is controlled to enable the active semiconductor device Q1 to present different impedances, so that the working current is adjusted, the active semiconductor device Q1 does not generate heat when no current exists, the heat is increased when the current is increased, the current and the voltage of the semiconductor control electrode are adjusted through a single chip microcomputer or an operational amplifier and a comparator to realize the constant current, the constant power and the constant temperature of the circuit, the heating speed is fast, the temperature control precision is high, the maximum power taking power is automatically limited so as to adapt to various different power supply environments, the power supply equipment of a user is not damaged, and due to the use of the existing power supply device of the user, a power.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A USB interface low-voltage aromatherapy heater comprises an active semiconductor device Q1, a control voltage CURRENTREF, an operational amplifier U1-A and a temperature control unit, wherein the patch is arranged on an aluminum substrate, the active semiconductor device Q1 is externally connected with a power supply voltage VCC through a lead, the USB interface low-voltage aromatherapy heater is characterized in that the current of the control voltage CURRENTREF is divided by a resistor R4 and a resistor R5 and then is input to the anode of the operational amplifier U1-A, the active semiconductor device Q1 is connected with a current sampling resistor R3, the current sampling resistor R3 is grounded, two ends of the current sampling resistor R3 are connected with a negative feedback input resistor R6, an electric signal of the current sampling resistor R3 is input to the cathode of the operational amplifier U1-A through the negative feedback input resistor R6, a resistor R2 is connected between the operational amplifier U1-A and the active semiconductor device Q1, and a negative feedback input resistor R10 is arranged between the resistor R2 and the negative feedback input resistor R6 in parallel.
2. The low-voltage aromatherapy heater with the USB interface as claimed in claim 1, wherein the temperature control unit comprises a temperature detection unit TEMP CHECK, and a resistor R9 and a negative temperature coefficient thermistor (NTC) R1 connected in parallel to the temperature detection unit TEMP CHECK, the resistor R9 is connected with a power supply voltage VCC by a wire, the negative temperature coefficient thermistor (NTC) R1 is connected to ground, when the temperature of the active semiconductor device Q1 rises, the negative temperature coefficient thermistor (NTC) R1 is heated to cause the internal CURRENT to change, the voltage of the temperature detection unit TEMP CHECK drops, and the voltage of the temperature detection unit TEMP CHECK is read by the single chip microcomputer, so that the voltage level of the CURRENT REF end is controlled in real time to realize constant temperature control.
3. The low voltage aromatherapy heater with USB interface as claimed in claim 2, wherein the output terminal of the temperature detection unit TEMP CHECK is also connected to the positive input terminal of an operational amplifier U1-B, the negative input terminal of the operational amplifier U1-B is connected to a reference voltage TEMP REF divided by a resistor R7 and a resistor R8, when the temperature of the active semiconductor device Q1 increases, the resistance of a negative temperature coefficient thermistor (NTC) R1 decreases, the voltage of the temperature detection unit TEMP CHECK decreases, resulting in a decrease in the voltage of the positive terminal of the operational amplifier U1-B, when the voltage of the negative input of the operational amplifier U1-B is higher than the voltage of the positive input, the voltage of the control voltage CURRENT connected to the output terminal of the operational amplifier U1-B decreases, at which the working CURRENT of the active semiconductor device Q1 decreases, the heating power decreases, the temperature is reduced; on the contrary, when the temperature is reduced, the working current of the active semiconductor device Q1 is increased, the heating power is increased, the temperature is increased, the constant temperature control is realized, and the constant value of the temperature can be adjusted by adjusting the voltage at the TEMP REF end.
4. The low-voltage aromatherapy heater with the USB interface as claimed in claim 1 or 2, wherein the power supply voltage VCC is supplied by a USB interface of a computer, a mobile phone charger, a mobile power supply or other power adapters.
5. The low-voltage aromatherapy heater with the USB interface as claimed in claim 1, wherein the active semiconductor device Q1 is a semiconductor element such as a triode or a field effect transistor.
6. The low-voltage aromatherapy heater with the USB interface as claimed in claim 1, wherein the operational amplifier U1-A can be replaced by a comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010241859.7A CN111330059A (en) | 2020-03-31 | 2020-03-31 | USB interface low pressure champignon heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010241859.7A CN111330059A (en) | 2020-03-31 | 2020-03-31 | USB interface low pressure champignon heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111330059A true CN111330059A (en) | 2020-06-26 |
Family
ID=71174869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010241859.7A Pending CN111330059A (en) | 2020-03-31 | 2020-03-31 | USB interface low pressure champignon heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111330059A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113455907A (en) * | 2021-08-18 | 2021-10-01 | 深圳市维展电子显示科技有限公司 | Intelligent temperature control drinking water system |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101171508A (en) * | 2005-03-07 | 2008-04-30 | 传感电子公司 | Temperature Feedback Control of Solid State Gas Sensors |
| CN101357236A (en) * | 2007-08-03 | 2009-02-04 | 鸿富锦精密工业（深圳）有限公司 | aroma distribution device |
| CN201297509Y (en) * | 2008-01-13 | 2009-08-26 | 深圳市华烨新科技实业有限公司 | Environmental-protection health-care mobile charging LED illuminating lamp |
| CN201499543U (en) * | 2009-08-10 | 2010-06-09 | 黄浩 | A USB electric heating mosquito coil type mosquito repellent |
| CN101831353A (en) * | 2010-02-26 | 2010-09-15 | 吴策 | Quick electric-heating high-accuracy controllable and adjustable essential oil aging system |
| CN203181251U (en) * | 2013-02-01 | 2013-09-04 | 宁波翔龙金属制品有限公司 | Vehicle forest air machine heating device |
| CN103685653A (en) * | 2012-09-14 | 2014-03-26 | 凹凸电子（武汉）有限公司 | Electronic equipment with fragrance generating function |
| CN103905036A (en) * | 2014-03-26 | 2014-07-02 | 广东大普通信技术有限公司 | Temperature control circuit of constant-temperature crystal oscillator |
| US20150157756A1 (en) * | 2012-08-08 | 2015-06-11 | Reckitt & Colman (Overseas) Limited | Device for Evaporating a Volatile Fluid |
| US20160143359A1 (en) * | 2013-06-26 | 2016-05-26 | Kimree Hi-Tech Inc. | Electronic cigarette and method for supplying constant power therein |
| US20160346418A1 (en) * | 2015-05-27 | 2016-12-01 | S.C. Johnson & Son, Inc. | Low wattage usb powered wax warmers |
| CN106339026A (en) * | 2015-07-15 | 2017-01-18 | 深圳市新宜康科技有限公司 | Electronic cigarette heating power stable control circuit |
| CN208480210U (en) * | 2018-08-15 | 2019-02-05 | 上海思拓测量技术有限公司 | A kind of circuit unit enabling PCB element constant temperature |
| CN208523778U (en) * | 2018-06-28 | 2019-02-22 | 深圳微风达科技有限公司 | Electronic cigarette control system |
| CN208641483U (en) * | 2017-09-28 | 2019-03-26 | 北京怡和嘉业医疗科技股份有限公司 | A heating device and ventilator |
-
2020
- 2020-03-31 CN CN202010241859.7A patent/CN111330059A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101171508A (en) * | 2005-03-07 | 2008-04-30 | 传感电子公司 | Temperature Feedback Control of Solid State Gas Sensors |
| CN101357236A (en) * | 2007-08-03 | 2009-02-04 | 鸿富锦精密工业（深圳）有限公司 | aroma distribution device |
| CN201297509Y (en) * | 2008-01-13 | 2009-08-26 | 深圳市华烨新科技实业有限公司 | Environmental-protection health-care mobile charging LED illuminating lamp |
| CN201499543U (en) * | 2009-08-10 | 2010-06-09 | 黄浩 | A USB electric heating mosquito coil type mosquito repellent |
| CN101831353A (en) * | 2010-02-26 | 2010-09-15 | 吴策 | Quick electric-heating high-accuracy controllable and adjustable essential oil aging system |
| US20150157756A1 (en) * | 2012-08-08 | 2015-06-11 | Reckitt & Colman (Overseas) Limited | Device for Evaporating a Volatile Fluid |
| CN103685653A (en) * | 2012-09-14 | 2014-03-26 | 凹凸电子（武汉）有限公司 | Electronic equipment with fragrance generating function |
| CN203181251U (en) * | 2013-02-01 | 2013-09-04 | 宁波翔龙金属制品有限公司 | Vehicle forest air machine heating device |
| US20160143359A1 (en) * | 2013-06-26 | 2016-05-26 | Kimree Hi-Tech Inc. | Electronic cigarette and method for supplying constant power therein |
| CN103905036A (en) * | 2014-03-26 | 2014-07-02 | 广东大普通信技术有限公司 | Temperature control circuit of constant-temperature crystal oscillator |
| US20160346418A1 (en) * | 2015-05-27 | 2016-12-01 | S.C. Johnson & Son, Inc. | Low wattage usb powered wax warmers |
| CN106339026A (en) * | 2015-07-15 | 2017-01-18 | 深圳市新宜康科技有限公司 | Electronic cigarette heating power stable control circuit |
| CN208641483U (en) * | 2017-09-28 | 2019-03-26 | 北京怡和嘉业医疗科技股份有限公司 | A heating device and ventilator |
| CN208523778U (en) * | 2018-06-28 | 2019-02-22 | 深圳微风达科技有限公司 | Electronic cigarette control system |
| CN208480210U (en) * | 2018-08-15 | 2019-02-05 | 上海思拓测量技术有限公司 | A kind of circuit unit enabling PCB element constant temperature |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113455907A (en) * | 2021-08-18 | 2021-10-01 | 深圳市维展电子显示科技有限公司 | Intelligent temperature control drinking water system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111330059A (en) | USB interface low pressure champignon heater | |
| CN101335460B (en) | Battery cutoff voltage setting system and setting method thereof | |
| CN205353802U (en) | Temperature regulation apparatus and temperature regulation circuit | |
| CN107256060A (en) | A kind of overheat protector applied on DOB and adjustment circuit | |
| CN206991152U (en) | A kind of overheat protector applied on DOB and adjustment circuit | |
| CN102967756B (en) | A kind of for the electric energy meter heater circuit under low temperature environment | |
| CN107450627B (en) | temperature control circuit | |
| CN214627391U (en) | Heating control circuit and electric appliance | |
| CN110267369A (en) | Heater circuit | |
| CN104533823A (en) | Temperature-control rotating speed control device of direct-current fan | |
| JPS59104515A (en) | Liquid level detection device | |
| CN116483156A (en) | A power management chip with temperature control regulation | |
| CN211908684U (en) | Terminal capable of realizing thermoelectric generation | |
| CN209280144U (en) | Infrared temperature measuring device | |
| CN218782544U (en) | An electronic switch with wide-range high-voltage input and adjustable temperature | |
| CN204733157U (en) | A kind of concentrator public network communication module with SIM card heating function | |
| CN204835506U (en) | Lithium cell charging protection circuit | |
| CN204155166U (en) | Radiator valve circuit | |
| CN209433264U (en) | A kind of lambda sensor automatic temperature control circuit | |
| CN206611593U (en) | A kind of automatic controller for temperature | |
| CN214896348U (en) | USB-based temperature control feedback system | |
| CN223156696U (en) | Over-temperature protection switch circuit | |
| CN211063832U (en) | L ED protection circuit | |
| CN219642133U (en) | Power-settable heating circuit with low-temperature reset function | |
| CN219871523U (en) | High-precision current sampling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200626 |
|
| RJ01 | Rejection of invention patent application after publication |