CN208351349U - A kind of electric appliance of self-heating - Google Patents
A kind of electric appliance of self-heating Download PDFInfo
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- CN208351349U CN208351349U CN201821061180.4U CN201821061180U CN208351349U CN 208351349 U CN208351349 U CN 208351349U CN 201821061180 U CN201821061180 U CN 201821061180U CN 208351349 U CN208351349 U CN 208351349U
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- thermistor
- electric appliance
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- bleeder circuit
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Abstract
The utility model discloses a kind of electric appliance of self-heating, electrical heating apparatus is provided in the electric appliance；The electrical heating apparatus includes: alternating current firewire connection terminal, alternating current zero curve connection terminal, closed type relay, temperature sensing module and heating wire；The temperature sensing module is used to export high level when environment temperature is higher than preset threshold；The output end of the temperature sensing module connects the control terminal of the closed type relay；First connecting terminal of the closed type relay connects the alternating current firewire connection terminal, and the second connecting terminal of the closed type relay connects the input terminal of the heating wire, and the output end of the heating wire connects the alternating current zero curve connection terminal.Implement the utility model, may be implemented also start the effect that heating wire is electric appliance heating in the inoperable situation of temperature sensing module, guarantee that electric appliance being capable of normal boot-strap and work.
Description
Technical field
The utility model embodiment is related to electric appliance guard technology more particularly to a kind of electric appliance of self-heating.
Background technique
Electronic component needs to run within the scope of suitable temperature, and therefore, at low ambient temperatures, electric appliance cannot normal work
Make.The prior art in electric appliance by being arranged temperature sensor and heating wire, when temperature sensor detects that environment temperature is lower than
When the threshold value of setting, heating wire starting is heated for electric appliance.Inventor is in implementing the present invention, it may, the discovery prior art is deposited
In following defect: under cryogenic, control circuit all cisco unity malfunctions of temperature sensing circuit and heating wire in electric appliance,
Even electric appliance cannot be started up, and therefore, the low-temperature protection scheme of the prior art can not effectively act as protective effect.
Utility model content
The utility model provides a kind of electric appliance of self-heating, to realize that can start heating wire under cryogenic realizes certainly
Heating, enables electric appliance normal boot-strap and work.
The electric appliance of self-heating provided by the embodiment of the utility model is provided with electrical heating apparatus in the electric appliance, comprising:
Alternating current firewire connection terminal, alternating current zero curve connection terminal, closed type relay, temperature sensing module and heating wire；
When the temperature sensing module is higher than preset threshold for environment temperature, high level is exported；The temperature sensing mould
The output end of block connects the control terminal of the closed type relay；Described in the first connecting terminal connection of the closed type relay
Second connecting terminal of alternating current firewire connection terminal, the closed type relay connects the input terminal of the heating wire, the electricity
The output end of heated filament connects the alternating current zero curve connection terminal.
The utility model embodiment is connected between heating wire and mains connection using normally closed relay, due to normally closed
For relay when control terminal is not charged, two connecting terminals are to maintain closure conducting, as long as so that connecting upper alternating current, electricity
Heated filament can work, other circuit modules can work normally in temperature sensing module and electric appliance, until environment temperature in electric appliance
When degree is higher than preset threshold, temperature sensing module just controls relay disconnection, can solve electric appliance under cryogenic conditions, temperature sensing mould
The problem of block can not work, and heating wire does not start, realization can also start electric heating in the inoperable situation of temperature sensing module
Silk is the effect of electric appliance heating, guarantees that electric appliance being capable of normal boot-strap and work.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the electrical heating apparatus in the utility model embodiment one；
Fig. 2 is the structural schematic diagram of temperature sensing module in the utility model embodiment two；
Fig. 3 is the structural schematic diagram of reference voltage output module in the utility model embodiment two.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.
In addition, term first, second, third, etc. in the specification and in the claims is only used for difference same technique spy
The description purpose of sign is not understood to indicate or imply relative importance or implicitly indicates the number of indicated technical characteristic
Amount, also not necessarily describes order or time sequencing.Term can be interchanged in a suitable case.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include at least one of the features.
Similarly, term " connection " equally is used in the specification and in the claims, should not be construed as being limited to direct
Connection.Therefore, expression " device A is connect with device B " should not necessarily be limited by device A in device or system and be directly connected to device B,
Meaning has path between device A and device B, this can be the path including other devices or tool.
Embodiment one
The utility model embodiment one provides a kind of electric appliance of self-heating, is provided with electrical heating apparatus in the electric appliance.Fig. 1
It is the structural schematic diagram of the electrical heating apparatus in the utility model embodiment one.Electrical heating apparatus is used in low temperature as electricity
Device heating, comprising: alternating current firewire connection terminal L, alternating current zero curve connection terminal N, closed type relay 11, temperature sensing module 12
With heating wire 13.
Wherein, temperature sensing module 12 is used to export high level when environment temperature is higher than preset threshold.Art technology
Multiple technologies means can be used in personnel, construct temperature sensing module 12 by the way that the connection structure of electronic component is arranged, for example,
Using temperature sensors such as thermoelectricity occasionally thermistors, environment temperature is converted into electric signal, using the electric signal as partial pressure electricity
The input signal of the circuit modules such as road, comparison circuit and/or switch conduction circuit, so that these circuit modules are in electric signal height
High level is exported when a certain threshold value, to realize when temperature environment is higher than preset threshold, obtains high level signal.
Those skilled in the art, which can also directly use, can be realized the IC chip of the function as the temperature sensing module 12.
Relay includes coil and two connecting terminals, and coil is the control terminal of relay, when the turn on angle of coil reaches
When prescribed requirement, the on off operating mode between two connecting terminals can change.And closed type relay, it is in coil no power
When (i.e. control terminal is not charged), be connected between two connecting terminals, when coil is powered (i.e. control terminal is high level), two companies
Contact point it is separated.In the present embodiment, the control terminal of the output end connection closed type relay of temperature sensing module 12, because
This, when the environment temperature in the normal work of temperature sensing module 12 and electric appliance is higher than preset threshold, closed type relay 11 is disconnected
It opens；When temperature sensing module 12 do not work or electric appliance in environment temperature be not above preset threshold when, normally closed relay 11 protect
Hold the state of closure conducting.First connecting terminal of closed type relay connects alternating current firewire connection terminal L, closed type relay
The second connecting terminal connection heating wire 13 input terminal, the output end of heating wire 13 connects the alternating current zero curve connection terminal N；
I.e. between 13 city Jie electrical circuit of closed type relay and heating wire, as long as access alternating current and conducting closed type relay, electricity
Heated filament 13 can work.Heating wire 13 is also disposed in electric appliance, for each electronic component heating for electric appliance, keeps electric appliance normal
Work.Circuit structure setting in this way, it is under cryogenic, normally closed if temperature sensing module 12 can not work normally
Type relay remains closed conducting, as long as electrical heating apparatus accesses alternating current, heating wire 13 will work, so that temperature in electric appliance
It increases, other electronic components in temperature sensing module 12 and electric appliance normally can start and work；Temperature sensing module later
12 meeting monitoring temperatures, when temperature is higher than preset threshold, normally closed relay 11 is disconnected, and heating wire 13 stops working, to prevent temperature mistake
Height burns out electronic component；When temperature falls below preset threshold, heating wire 13 can restart work again and keep in electric appliance
The work of proper temperature electronic component.The working condition for depending on temperature sensing module 12 compared with prior art, is detecting temperature
Just start heating wire 13 when lower than preset threshold, the technical solution of the present embodiment can be opened when temperature sensing module 12 does not work
Electro kinetic potential silk 13, enables electric appliance normal boot-strap and work.
Electric appliance in the present embodiment can be any electric appliance for needing to heat, such as with complicated circuit construction and numerous collection
At the computer or television set of circuit chip.
On the basis of above scheme, electrical heating apparatus can also include ship type switch 14, and ship type switch 14 is connected to
Between the first connecting terminal and electrical fire line connection terminal L of normally closed relay 11.Ship type switch 14 can expose to electric appliance casing,
User can control the energized state of heating wire 13 by ship type switch 14.In electric appliance standby, it can directly turn off electric appliance and add
Thermal avoids increasing stand-by power consumption when standby for electric appliance heating.
In conclusion the technical solution of the present embodiment, is connected to heating wire and mains connection using normally closed relay
Between, since normally closed relay is when control terminal is not charged, two connecting terminals are to maintain closure conducting, as long as so that
Alternating current in connection, heating wire can work, other circuit modules can work normally in temperature sensing module and electric appliance, until
When environment temperature is higher than preset threshold in electric appliance, temperature sensing module just controls relay disconnection, can solve electric under cryogenic conditions
The problem of device, temperature sensing module can not work, and heating wire does not start is realized in the inoperable situation of temperature sensing module
Also it can start the effect that heating wire is electric appliance heating, guarantee that electric appliance being capable of normal boot-strap and work.
Embodiment two
The electric appliance of the offer self-heating of the utility model embodiment two further realizes scheme, referring to fig. 2 to Fig. 3, implements
Example two on the basis of example 1, it is further proposed that realize temperature sensing module concrete scheme.
It referring to fig. 2, is the structural schematic diagram of temperature sensing module in the present embodiment.Temperature sensing module includes thermistor
Bleeder circuit 121, reference voltage output module 122 and comparator U1.
Wherein, thermistor bleeder circuit 121 is for exporting voltage corresponding with environment temperature.Thermistor is a kind of temperature
Sensor is spent, both ends resistance value varies with temperature and changes；Bleeder circuit is that a kind of common thermistor turns temperature signal
It is changed to the implementation of electric signal, thermistor and the series connection of other resistance are followed by between DC power supply and ground terminal, can make
The electric signal and temperature signal of the divider node (i.e. the output end of bleeder circuit) of thermistor and other resistance are interrelated.Heat
An input terminal of the output end connection comparator U1 of quick resistor voltage divider circuit 121, the output end of reference voltage output module 122
Another input terminal of comparator U1 is connected, then the voltage value that comparator U1 can be exported in thermistor bleeder circuit 121 is big
High level is exported when reference voltage, the output end of comparator U1 is the output end vo 2 of temperature sensing module.Pass through conjunction
The thermistor or negative temperature coefficient of reason selection positive temperature coefficient (Positive Temperature Coefficient, PTC)
The partial pressure of thermistor and other resistance is arranged in the thermistor of (Negative Temperature Coefficient, NTC)
Thermistor bleeder circuit then may be implemented in the connectivity port of structure and thermistor bleeder circuit 121 and comparator U1
121 export high level when environment temperature is higher than preset threshold.
It is the temperature sensing module embodiment of one of thermistor using negative temperature coefficient as shown in Figure 2.Heat
Quick resistor voltage divider circuit 121 includes the thermistor Rx of first resistor R1 and negative temperature coefficient, and the first end of thermistor Rx connects
It connects DC power supply (port of 12V DC voltage preferably, is exported in connecting circuit), the second end connection first of thermistor Rx
The first end of resistance R1, the second end ground connection of first resistor R1, the first end of first resistor R1 is thermistor bleeder circuit 121
Output end, thermistor bleeder circuit 121 output end connection comparator U1 normal phase input end, reference voltage output module
122 output end connects the inverting input terminal of the comparator U1.The thermistor Rx of negative temperature coefficient when the temperature rises, hinders
Value reduces, therefore the voltage got also reduces, and the voltage that first resistor R1 is got increases, so that being output to comparator U1 just
The voltage of phase input terminal increases, when the voltage of normal phase input end is greater than the reference voltage of inverting input terminal, comparator U1 output
High level.
In the specific implementation, those skilled in the art can neatly adjust foregoing circuit structure, for example, with multiple resistance
Series-parallel assembly substitute first resistor R1, can as shown in Fig. 2, thermistor bleeder circuit 121 further includes 3rd resistor R3
With the first resistor R1 in the parallel combination body of first resistor R1 and 3rd resistor R3 substitution foregoing circuit structure.It can also increase
Add the first capacitor C1 in parallel with first resistor R1, plays the role of filtering.It is defeated in first resistor R1 and the reverse phase of comparator U1
Enter on the connection path between end, the 4th resistance R4 can be set, facilitates the voltage value of adjustment inverting input terminal.Comparator U1 tool
Have feeder ear, generally require connection 3.3V DC power supply or 5V DC power supply power supply, feeder ear can connect the second capacitor C2 and
It is grounded after the parallel combination body of third capacitor C3.
It selects the thermistor Rx of positive temperature coefficient, change position or change heat of the thermistor Rx in bleeder circuit
The port comparator U1 that the output end of quick resistor voltage divider circuit 121 is connected, can realize the utility model embodiment medium temperature
Spend the function of sensing module.Based on this, three kinds of alternative solutions are set forth below:
One, thermistor bleeder circuit 121 includes the thermistor Rx of first resistor R1 and negative temperature coefficient, first resistor
The first end of R1 connects DC power supply, and the second end of first resistor R1 connects the first end of thermistor Rx, thermistor Rx's
Second end ground connection, the first end of thermistor Rx are the output end of the thermistor bleeder circuit 121, thermistor partial pressure electricity
The inverting input terminal of the output end connection comparator U1 on road 121, the output end of reference voltage output module 122 connect comparator U1
Normal phase input end.When temperature increases, thermistor Rx resistance value reduces, and the voltage got reduces, and the reverse phase of comparator U1 is defeated
When entering to hold voltage to be less than the reference voltage of normal phase input end, high level is exported.
Two, thermistor bleeder circuit 121 includes the thermistor Rx of first resistor R1 and positive temperature coefficient, thermistor
The first end of Rx connects DC power supply, and the second end of thermistor Rx connects the first end of first resistor R1, first resistor R1's
Second end ground connection, the first end of first resistor R1 are the output end of thermistor bleeder circuit 121, thermistor bleeder circuit
The inverting input terminal of 121 output end connection comparator U1, the output end connection comparator U1's of reference voltage output module 122
Normal phase input end.When temperature increases, thermistor Rx resistance value increases, and the voltage got increases, and first resistor R1 is got
Voltage reduces, and when the inverting input terminal voltage of comparator U1 is less than the reference voltage of normal phase input end, exports high level.
Three, thermistor bleeder circuit 121 includes the thermistor Rx of first resistor R1 and positive temperature coefficient, first resistor
The first end of R1 connects DC power supply, and the second end of first resistor R1 connects the first end of thermistor Rx, thermistor Rx's
Second end ground connection, the first end of thermistor Rx are the output end of thermistor bleeder circuit 121, thermistor bleeder circuit
The normal phase input end of 121 output end connection comparator U1, the output end connection comparator U1's of reference voltage output module 122
Inverting input terminal.When temperature increases, thermistor Rx resistance value increases, and the voltage got increases, the positive input of comparator U1
When voltage being held to be greater than the reference voltage of inverting input terminal, high level is exported.
In addition, the present embodiment also provides a kind of specific embodiment of reference voltage output module 122.It is this shown in Fig. 3
The structural schematic diagram of reference voltage output module 122 in embodiment.Reference voltage output module 122 includes second resistance R2 and base
Quasi- voltage chips U2.Reference voltage chip U2, such as can be TL431 chip, output is stablized when referring to pole R connection cathode K
Voltage, the reference voltage being widely used as in comparison circuit.The first end connection DC power supply of second resistance R2 (can be with
The port that 12V DC voltage is exported in the same connecting circuit of temperature sensing module, also can connect other DC power supplies), second
The cathode K of the second end connection benchmark voltage chips U1 of resistance R2, the anode A ground connection of reference voltage chip U1, cathode K and reference
Pole connects R；The cathode K of reference voltage chip U1 is the output end vo 1 of benchmark voltage output module 122.
Further, reference voltage output module 122 can also include the 4th capacitor C4 and the 7th resistance being mutually in parallel
R7 is connected between the cathode and anode of reference voltage chip U1.It can also include the 6th resistance R6, reference voltage chip U1's
Cathode is exported by the 6th resistance R6, facilitates adjusting parameter.
In conclusion the technical solution of the present embodiment, is connected to heating wire and mains connection using normally closed relay
Between, since normally closed relay is when control terminal is not charged, two connecting terminals are to maintain closure conducting, as long as so that
Alternating current in connection, heating wire can work, other circuit modules can work normally in temperature sensing module and electric appliance, until
When environment temperature is higher than preset threshold in electric appliance, temperature sensing module just controls relay disconnection, can solve electric under cryogenic conditions
The problem of device, temperature sensing module can not work, and heating wire does not start is realized in the inoperable situation of temperature sensing module
Also it can start the effect that heating wire is electric appliance heating, guarantee that electric appliance being capable of normal boot-strap and work.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright
Aobvious variation, readjustment and substitution is without departing from the protection scope of the utility model.Therefore, although passing through above embodiments
The utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from
It can also include more other equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Scope of the claims determine.
Claims (9)
1. a kind of electric appliance of self-heating, which is characterized in that be provided with electrical heating apparatus in the electric appliance；The electric appliance heating dress
Set includes: alternating current firewire connection terminal, alternating current zero curve connection terminal, closed type relay, temperature sensing module and heating wire；
The temperature sensing module is used to export high level when environment temperature is higher than preset threshold；The temperature sensing module
Output end connect the control terminal of the closed type relay；First connecting terminal of the closed type relay connects the city
Second connecting terminal of electrical fire line connection terminal, the closed type relay connects the input terminal of the heating wire, the electric heating
The output end of silk connects the alternating current zero curve connection terminal.
2. the electric appliance of self-heating according to claim 1, which is characterized in that the temperature sensing module includes thermistor
Bleeder circuit, reference voltage output module and comparator；The thermistor bleeder circuit is corresponding with environment temperature for exporting
Voltage；The output end of the thermistor bleeder circuit connects an input terminal of the comparator, and the reference voltage is defeated
The output end of module connects another input terminal of the comparator out, and the output end of the comparator is the temperature sensing mould
The output end of block.
3. the electric appliance of self-heating according to claim 2, which is characterized in that the thermistor bleeder circuit includes first
The thermistor of resistance and negative temperature coefficient, the first end of the thermistor connect DC power supply, and the of the thermistor
Two ends connect the first end of the first resistor, the second end ground connection of the first resistor, and the first end of the first resistor is
The output end of the output end of the thermistor bleeder circuit, the thermistor bleeder circuit connects the positive of the comparator
The output end of input terminal, the reference voltage output module connects the inverting input terminal of the comparator.
4. the electric appliance of self-heating according to claim 2, which is characterized in that the thermistor bleeder circuit includes first
The thermistor of resistance and negative temperature coefficient, the first end of the first resistor connect DC power supply, and the of the first resistor
Two ends connect the first end of the thermistor, the second end ground connection of the thermistor, and the first end of the thermistor is
The output end of the output end of the thermistor bleeder circuit, the thermistor bleeder circuit connects the reverse phase of the comparator
The output end of input terminal, the reference voltage output module connects the normal phase input end of the comparator.
5. the electric appliance of self-heating according to claim 2, which is characterized in that the thermistor bleeder circuit includes first
The thermistor of resistance and positive temperature coefficient, the first end of the thermistor connect DC power supply, and the of the thermistor
Two ends connect the first end of the first resistor, the second end ground connection of the first resistor, and the first end of the first resistor is
The output end of the output end of the thermistor bleeder circuit, the thermistor bleeder circuit connects the reverse phase of the comparator
The output end of input terminal, the reference voltage output module connects the normal phase input end of the comparator.
6. the electric appliance of self-heating according to claim 2, which is characterized in that the thermistor bleeder circuit includes first
The thermistor of resistance and positive temperature coefficient, the first end of the first resistor connect DC power supply, and the of the first resistor
Two ends connect the first end of the thermistor, the second end ground connection of the thermistor, and the first end of the thermistor is
The output end of the output end of the thermistor bleeder circuit, the thermistor bleeder circuit connects the positive of the comparator
The output end of input terminal, the reference voltage output module connects the inverting input terminal of the comparator.
7. the electric appliance of self-heating according to any one of claims 1 to 6, which is characterized in that the electrical heating apparatus is also
It is switched including ship type, the first connecting terminal that the ship type switch is connected to the normally closed relay is connect with the alternating current firewire
Between terminal.
8. according to the electric appliance of the described in any item self-heatings of claim 2 to 6, which is characterized in that the reference voltage exports mould
Block includes second resistance and reference voltage chip, and the first end of the second resistance connects DC power supply, the second resistance
Second end connects the cathode of the reference voltage chip, the plus earth of the reference voltage chip, and cathode is connect with reference to pole；
The cathode of the reference voltage chip is the output end of the reference voltage output module.
9. the electric appliance of self-heating according to any one of claims 1 to 6, which is characterized in that the electric appliance is television set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821061180.4U CN208351349U (en) | 2018-07-05 | 2018-07-05 | A kind of electric appliance of self-heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821061180.4U CN208351349U (en) | 2018-07-05 | 2018-07-05 | A kind of electric appliance of self-heating |
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| Publication Number | Publication Date |
|---|---|
| CN208351349U true CN208351349U (en) | 2019-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821061180.4U Active CN208351349U (en) | 2018-07-05 | 2018-07-05 | A kind of electric appliance of self-heating |
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| Country | Link |
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| CN (1) | CN208351349U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463511A (en) * | 2020-04-28 | 2020-07-28 | 湖南拓疆能源科技有限公司 | Lithium battery system for low-temperature environment and control method thereof |
-
2018
- 2018-07-05 CN CN201821061180.4U patent/CN208351349U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463511A (en) * | 2020-04-28 | 2020-07-28 | 湖南拓疆能源科技有限公司 | Lithium battery system for low-temperature environment and control method thereof |
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