CN207817142U - Heater test circuit - Google Patents
Heater test circuit Download PDFInfo
- Publication number
- CN207817142U CN207817142U CN201721473909.4U CN201721473909U CN207817142U CN 207817142 U CN207817142 U CN 207817142U CN 201721473909 U CN201721473909 U CN 201721473909U CN 207817142 U CN207817142 U CN 207817142U
- Authority
- CN
- China
- Prior art keywords
- circuit
- test
- control circuit
- heater
- time
- 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.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 223
- 230000005611 electricity Effects 0.000 claims description 18
- 238000012545 processing Methods 0.000 claims description 13
- 230000009466 transformation Effects 0.000 claims 1
- 239000000919 ceramic Substances 0.000 description 37
- 230000001276 controlling effect Effects 0.000 description 23
- 238000000034 method Methods 0.000 description 11
- 230000000875 corresponding effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a heater test circuit. Wherein, this heater test circuit includes: the control circuit is used for controlling the test time and the test voltage; and the plurality of test circuits are connected in parallel to the control circuit and used for testing the heater of each connected test circuit. The utility model provides a current test circuit can't carry out the technical problem who tests to a plurality of pottery PTC electric heater.
Description
Technical field
The utility model is related to heater contexts, in particular to a kind of heater test circuit.
Background technology
Ceramic PTC electric heater refers to being used as auxiliary electrical heater for air conditioner, by PTC heater, temperature limiter, hot melt
The electroheat member of the compositions such as disconnected body, mounting bracket and other accessories.Its safety is particularly important, and interpolar pressure resistance survey need to be carried out to it
Examination.
Fig. 1 is a kind of circuit diagram of interpolar voltage-withstand test according to prior art, as shown in Figure 1, ceramic PTC electric heater
Both ends be connected respectively with adjustable stabilized voltage supply by open pipe K and resistance BX, and in the test circuit, by a voltmeter and pottery
Porcelain PTC electric heater is in parallel.
Ambient temperature and moisture, it is calm under conditions of, ceramic PTC electric heater is accessed in the disruptive test circuit of Fig. 1, it is right
It applies 450V voltages and continues 60S, and observation ceramic PTC electric heater breakdown, electric discharge or arcing phenomena should not occurs, be wiped with hand
Silk-screen, silk-screen must not obscure, fall off.
Current test method is that ceramic PTC electric heater is accessed to progress proof voltage test in Fig. 1 circuits as requested,
However the method is poor to the test effect of ceramic PTC electric heater interpolar pressure resistance, the reliability of test result is relatively low, predominantly
Following aspect：
1, ceramic PTC electric heater interpolar voltage-withstand test can not accurately be required to survey according to dependence test technology
Examination, the test electric current of test request, testing time cannot carry out specification, can not extract accurate test data；
2, for the test result of ceramic PTC electric heater interpolar pressure resistance, need to manually be judged, there are the quality of erroneous judgement
Hidden danger；
Its testing time is longer when 3, being tested ceramic PTC electric heater access proof voltage, and can only test 1 every time
Part, testing efficiency are relatively low.
The problem of multiple ceramic PTC electric heaters can not being tested for above-mentioned existing test circuit, at present not yet
It is proposed effective solution scheme.
Utility model content
The utility model embodiment provides a kind of heater test circuit, can not be right at least to solve existing test circuit
The technical issues of multiple ceramic PTC electric heaters are tested.
According to the one side of the utility model embodiment, a kind of heater test circuit is provided, including：Control electricity
Road, for controlling testing time and test voltage；Multiple test circuits, the multiple test circuit parallel connection access the control electricity
Road, the heater for each test circuit to access are tested.
Further, the control circuit includes：Voltage control circuit, for controlling the test voltage；Time control
Circuit, it is in parallel with the voltage control circuit, for controlling the testing time.
Further, the voltage control circuit includes：Transformer is connected with power supply, is used for the voltage of the power supply
Be converted to the test voltage；Contactor is connected between the transformer and the test circuit, for controlling the test
Connection between circuit and the transformer and disconnection.
Further, the contactor includes first contactor and second contactor, and the time control circuit includes：The
One time control circuit, the Lifetime for controlling the first contactor；Second time control circuit, when with described first
Between control circuit it is in parallel, the Lifetime for controlling the second contactor.
Further, the first time control circuit includes：Time relay normally closed contact, is used for and the time relay
Fitting coils control the Lifetime of the first time control circuit；Starting switch, with the time relay normally closed contact
It is connected, the connection for controlling the first time control circuit；First contactor coil is connected with the starting switch, uses
It is powered in after starting switch connection, controls the first contactor connection；First contactor normally opened contact is opened with described
Dynamic switch and the time relay normally open contact are in parallel, for being closed in the case where the first contactor coil is powered；
Relay coil is connected with the first contactor coil, for controlling relay work.
Further, second time control circuit includes：Relay switch, for coordinating with the relay coil
Control the Lifetime of second time control circuit；Second contactor coil, is connected with relay switch, for described
Relay switch is powered in the case of being connected to, and controls the second contactor and is closed；Time relay coil connects with described second
Tentaculum coil is connected, and works for the time relay.
Further, the test circuit includes：Heater circuit is connected with the voltage control circuit, in institute
It states and tests the heater under test voltage；Failure alarm circuit, it is in parallel with the time control circuit, in the heating
It alarms in the case of device short circuit.
Further, the test circuit includes：Breaker, wherein the breaker is double-pole single throw；It is described disconnected
The heater circuit being connect with the voltage control circuit is provided in first access of road device, the breaker is used for
It is disconnected in the case of the heater short circuit；The failure alarm circuit is set in the alternate path of the breaker, wherein
The alternate path of the breaker is in parallel with alarm, is led for controlling the alarm in the case where the breaker disconnects
It is logical.
Further, the failure alarm circuit includes：Intermediate relay, the alternate path and report of the intermediate breaker
It connects with the relay after alert device parallel connection.
Further, the heater test circuit further includes：Electric current warning circuit, wherein the electric current warning circuit
Including multiple ammeters, signal processing circuit, alarm；Each ammeter in the multiple ammeter is connected to each institute
It states between test circuit and the voltage control circuit, the current value for measuring the test circuit；The signal processing electricity
Road is in parallel with the time control circuit after connecting with alarm, wherein the signal processing circuit is used in the current value
The alarm conducting is controlled in the case of above or below predetermined threshold.
In the utility model embodiment, testing time and test voltage are controlled by control circuit, and by multiple tests
Circuit in parallel accesses in control circuit, when control circuit can be enable to control test voltage and the test of multiple test circuits
Between, make every test circuit that can use identical test voltage to the heater in every test circuit according to identical test
Time is tested, and is carried out to realize the electric heater in multiple test circuits by the control circuit of multiple test circuits
The technique effect of test, and then solve the technology that existing test circuit can not test multiple ceramic PTC electric heaters
Problem.
Description of the drawings
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model
It limits.In the accompanying drawings：
Fig. 1 is a kind of circuit diagram of interpolar voltage-withstand test according to prior art；
Fig. 2 is the schematic diagram according to a kind of heater test circuit of the utility model embodiment；
Fig. 3 is a kind of circuit of the method for quick test ceramic PTC electric heater interpolar pressure resistance according to the present utility model
Figure.
Specific implementation mode
In order to make those skilled in the art more fully understand the utility model, below in conjunction with the utility model reality
The attached drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment is only the embodiment of the utility model part, instead of all the embodiments.Based on the reality in the utility model
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts is all answered
When the range for belonging to the utility model protection.
It should be noted that term " first " in the specification and claims of the utility model and above-mentioned attached drawing,
" second " etc. is for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that in this way
The data used can be interchanged in the appropriate case, so that the embodiments of the present invention described herein can be in addition at this
In illustrate or description those of other than sequence implement.In addition, term " comprising " and " having " and their any deformation, meaning
Figure be to cover it is non-exclusive include, for example, containing the process of series of steps or unit, method, system, product or equipment
Those of be not necessarily limited to clearly to list step or unit, but may include not listing clearly or for these processes,
The intrinsic other steps of method, product or equipment or unit.
Fig. 2 is according to a kind of schematic diagram of heater test circuit of the utility model embodiment, as shown in Fig. 2, the dress
It sets and may include：Control circuit 21, for controlling testing time and test voltage；Multiple test circuits 23, multiple test circuits
Parallel connection access control circuit, the heater for each test circuit to access are tested.
According to the utility model above-described embodiment, testing time and test voltage are controlled by control circuit, and will be multiple
Test circuit parallel connection accesses in control circuit, and control circuit can be enable to control test voltage and the test of multiple test circuits
Time makes every test circuit that can use identical test voltage to the heater in every test circuit according to identical survey
The examination time is tested, to by the control circuits of multiple test circuits realize the electric heater in multiple test circuits into
The technique effect of row test, and then solve the skill that existing test circuit can not test multiple ceramic PTC electric heaters
Art problem.
Optionally, each test circuit includes an electric heater, and each test circuit is used for in the test circuit
Electric heater tested.
Optionally, heater can be ceramic PTC electric heater.
Optionally, the heater in each test circuit is detachable.
As a kind of optional embodiment, control circuit includes：Voltage control circuit, for controlling test voltage；Time
Control circuit, it is in parallel with voltage control circuit, for controlling the testing time.
Using the utility model above-described embodiment, control circuit includes voltage control circuit and time control circuit, control
In circuit processed, by voltage control circuit control test circuit in be used for test circuit voltage, by time control circuit come
Lifetime and the turn-off time for controlling voltage control circuit, to control the testing time in test circuit.
Optionally, the testing time can be 60S, and test voltage can be 450V, and control circuit controls the survey of a plurality of parallel connection
Try circuit 450V operating at voltages 60S, to test the electric heater in each test circuit.
Optionally, voltage control circuit can be forceful electric power circuit, and time control circuit can be light current circuit, in voltage control
At least one set of contactor or relay can be connected in circuit and time control circuit processed, so as to pass through time control circuit
Voltage control circuit is controlled, the scheme with vulnerabilities scan forceful electric power is realized.
Optionally, in the case where control circuit includes contactor, a contact of a test circuit and contactor
It is connected, the test circuit which is connected can be controlled by contactor.
As a kind of optional embodiment, voltage control circuit includes：Transformer is connected with power supply, is used for power supply
Voltage is converted to test voltage；Contactor is connected between transformer and test circuit, for controlling test circuit and transformer
Between connection and disconnection.
Using the utility model above-described embodiment, in voltage control circuit, it is connected with power supply by transformer, change can be made
The voltage that power supply provides is converted into testing required voltage by depressor；Contactor is connected between transformer and test circuit, by
In the characteristic of contactor, contactor can be controlled by light current circuit, and test circuit is controlled in voltage control circuit and is become
The connection and disconnection of depressor, so that the Lifetime by control contactor and turn-off time, can control the testing time.
Optionally, power supply is three phase mains, i.e. 380V, and transformer can be converted to the 380V voltages that three phase mains provides
The test voltage of 450V needed for test.
As a kind of optional embodiment, contactor includes first contactor and second contactor；Time control circuit packet
It includes：First time control circuit, the Lifetime for controlling first contactor；Second time control circuit, with first time
Control circuit is in parallel, the Lifetime for controlling second contactor.
It should be noted that time control circuit is by controlling the Lifetime of voltage control circuit come when controlling test
Between, according to the principle of light current control forceful electric power, in the case of contactor is used in voltage control circuit, deposited in time control circuit
Each contactor in voltage control circuit is being controlled with the one-to-one control circuit of contactor in voltage control circuit
Connection and disconnection.
May include multiple contactors using the utility model above-described embodiment, in voltage control circuit, such as the first contact
Device and second contactor, then time control circuit includes control circuit corresponding with contactor, as first contactor is corresponding
First time control circuit and corresponding second time control circuit of second contactor pass through first in time control circuit
Time control circuit controls the Lifetime of first contactor, by the second time control circuit controls second contactor
Lifetime controls the testing time to realize by the Lifetime of time control circuit control voltage control circuit
Effect.
Optionally, further include in first time control circuit and the second time control circuit：Relay can pass through relay
Device establishes the contact between first time control circuit and the second time control circuit, realizes to first time control circuit and the
The synchronous control of two time control circuits.
Optionally, further include in first time control circuit and the second time control circuit：The time relay can pass through
The time relay establishes the contact between first time control circuit and the second time control circuit, can also pass through time relay
Device determines the Lifetime of first time control circuit and the second time control circuit, and then controls first in voltage control circuit
The Lifetime of contactor and second contactor realizes the control to test circuit power-on time.
As a kind of optional embodiment, first time control circuit includes：Time relay normally closed contact, be used for and when
Between relay coil cooperation control first time control circuit Lifetime；Starting switch, with time relay normally closed contact
It is connected, the connection for controlling first time control circuit；First contactor coil, is connected with starting switch, for starting
It is powered after switch connection, control first contactor connection；First contactor normally opened contact, it is normal with starting switch and the time relay
Contact shunt is opened, for being closed in the case where first contactor coil is powered；Relay coil, with first contactor coil phase
Even, for controlling relay work.
According to the utility model above-described embodiment, after pressing starting switch, electric current passes through time relay normally closed contact
With after the starting switch of closure enter first contactor coil, make first contactor coil be powered；After first contactor is powered, with
Starting switch and the first contactor normally opened contact of time relay normally open contact parallel connection are closed, and make first contactor self-locking, into
And control the first contactor in voltage control circuit and be even closed, so that the test circuit that transformer is connect with first contactor is connected
It is logical；In addition, in first time control circuit, further include and the concatenated relay coil of first contactor coil.It is connect first
In the case that tentaculum coil is powered, which is also powered, and then controls relay work.
Optionally, the switch of above-mentioned relay is connected in the second time control circuit, for logical in first time circuit
In the case of electricity, the second time control circuit is controlled.
As a kind of optional embodiment, the second time control circuit includes：Relay switch, is used for and relay coil
The connection and disconnection of cooperation the second time control circuit of control；Second contactor coil, is connected with relay switch, for after
Electric switch is powered in the case of being connected to, and control second contactor is closed；Time relay coil, with second contactor coil phase
Even, it works for control time relay.
According to the utility model above-described embodiment, relay switch can be the normally opened contact of relay, at the first time
In the case that relay coil in control circuit is powered, relay switch closure is controlled, electric current is allow to pass through the relay
Device switch flows into second contactor coil, and then second contactor coil is made to be powered, and controls second in voltage control circuit
Contactor is closed, the test circuit connection for making transformer be connect with second contactor.
In addition, further including time relay coil in second control circuit, the case where second contactor coil is powered
Under, which is also powered, the work of control time relay.
Optionally, time relay switch links with first contactor normally opened contact, reaches predetermined work in the time relay
After making the time, time relay switch disconnects, and then the also synchronous disconnection of first contactor normally opened contact, makes to control electricity at the first time
Road powers off, to which the first contactor in voltage control circuit also simultaneously switches off.
Optionally, in the case where first time control circuit disconnects, the relay coil in first time control circuit
Power-off, and then in the second time control circuit, relay switch corresponding with above-mentioned relay coil disconnects, and makes for the second time control
Down circuitry processed, to which the second contactor in voltage control circuit also simultaneously switches off.
Optionally, in voltage control circuit may include multiple contactors, and each contactor can connect it is multiple
Test circuit, in order to avoid multiple contactors are connected to simultaneously and causes the transient current in heater test circuit excessive, can be with
Set above-mentioned relay to time-delay relay, relay coil is time-delay relay coil, and relay switch is delay relay
Device switchs.
Optionally, time-delay relay can be switched on time-delay relay, and after the energization of first time control circuit, first connects
Tentaculum is closed, and the coil of energization delay relay is also synchronous to be powered, and so that energization delay relay is worked asynchronously, on-delay relay
After reaching predetermined delay time, control energization delay relay switch is closed device, so that the second time control circuit is worked, in turn
It controls second contactor to be closed, realizes the control to second contactor timing closing, make first contactor and second contactor
It is successively closed, avoids first contactor and second contactor is closed at and leads to the transient current in heater test circuit
Excessive problem.
Optionally, the predetermined delay time of delay electricity-saving device is less than the schedule operating time of the time relay.
Optionally, in the second time control circuit, the second contact normally opened contact is in parallel with relay switch.
Optionally, in the second time control circuit, second contactor not self-locking.
Using the utility model above-described embodiment, by being connect in first time control circuit and the second time control circuit
Angle of incidence relay can be realized according to the schedule operating time of the time relay to first time control circuit and second
The control of the closing time to first contactor and second contactor is furthermore achieved in the control of time control circuit Lifetime
System, and then the control to the conduction time of test circuit is realized, so as to control the testing time of test circuit.
As a kind of optional embodiment, test circuit includes：Heater circuit is connected with voltage control circuit, is used for
The testing heater under test voltage；Failure alarm circuit, it is in parallel with time control circuit, for the situation in heater short circuit
Lower alarm.
It should be noted that voltage control circuit is forceful electric power circuit, time control circuit is light current circuit, by heater electricity
Road is connected with voltage control circuit, can make the heater in heater circuit in the high-tension circuit that voltage control circuit provides
It is tested；Failure alarm circuit is in parallel with time control circuit, electric power is provided by light current circuit, in the situation of heater short circuit
Under, failure alarm circuit can light current circuit provide electric power under alarm, in turn, by test circuit be divided into heater circuit and
Failure alarm circuit, and powered respectively by forceful electric power circuit and light current circuit, the high electricity needed for the test for ensureing heater
In the case of pressure, electric power is provided for failure alarm circuit by low-voltage, is avoided produced by failure alarm circuit and High Voltage Power Supply
Risk.
As a kind of optional embodiment, test circuit includes：Breaker, wherein breaker is double-pole single throw；It is disconnected
The heater circuit being connect with voltage control circuit is provided in first access of road device, breaker is used in heater short circuit
In the case of disconnect；Failure alarm circuit is set in the alternate path of breaker, wherein the alternate path and alarm of breaker
Parallel connection, for controlling alarm conducting in the case where breaker disconnects.
Using the utility model above-described embodiment, breaker is double-pole single throw, wherein the first cutter spacing in breaker
In the first access of breaker, it is connected between voltage control circuit and heater circuit, in the case of breaker closing,
First access is connected, and so that heater circuit is received the electric power provided by voltage control circuit, in the situation of heater short circuit
Under, circuit is protected in the automatic tripping of breaker；The second cutter spacing in breaker is in the alternate path of breaker, wherein this second
Knife is in parallel with alarm, by the alternate path of breaker that alarm is breaking in the case of breaker closing；In breaker
In the case of disconnection, the conducting of alarm in alternate path, so as to controlled simultaneously by a breaker forceful electric power circuit and
The connection and disconnection of light current circuit, and then realize the alarm under heater short-circuit conditions.
As a kind of optional embodiment, failure alarm circuit includes：Intermediate relay, the alternate path and report of breaker
It connects with intermediate relay after alert device parallel connection.
Using the utility model above-described embodiment, after the alternate path of breaker is in parallel with alarm with intermediate relay phase
Even, can in the case of breaker closing, that is, breaker by alarm open circuit in the case of, undertaken by intermediate relay negative
It carries, heater test circuit is avoided to receive short-circuit damage.
Optionally, in high-tension circuit, using intermediate relay as load, can to avoid use resistance as load and
The decompression phenomenon of generation and cause alarm not work, the risk caused by electrical resistance overheats can also be avoided.
As a kind of optional embodiment, heater test circuit further includes：Electric current warning circuit, wherein electric current is alarmed
Circuit includes multiple ammeters, signal processing circuit, alarm；Each ammeter in multiple ammeters, is connected to each survey
It tries between circuit and voltage control circuit, the current value for measuring test circuit；After signal processing circuit is connected with alarm
It is in parallel with time control circuit, wherein signal processing circuit in the case where current value is above or below predetermined threshold for controlling
Alarm conducting processed.
Using utility model above-described embodiment, ammeter is connected to by the electric current warning circuit in heater test circuit
Each between test circuit and voltage control circuit, the current value in each test circuit is tested by ammeter；And in electricity
It flows in warning circuit, it is in parallel with time control circuit again after signal processing circuit is connected with alarm, and then signal processing electricity
Road can be responded according to the current value measured by ammeter, be controlled in the case where current value is above or below predetermined threshold
Alarm is connected.
Optionally, signal processing circuit can be decision circuitry, in the corresponding multiple ammeters of multiple test circuits, go out
In the case that current value measured by existing one of them or at least one ammeter is above or below predetermined threshold, conducting letter is sent out
Number, control alarm conducting.
In the above-described embodiments, alarm can be buzzer, light emitting diode.
The utility model additionally provides a kind of preferred embodiment, and the preferred embodiment provides a kind of quickly test ceramics
The method of PTC electric heater interpolar pressure resistance.
Fig. 3 is a kind of signal of the circuit of quick test ceramic PTC electric heater interpolar pressure resistance according to the present utility model
Figure, as shown in figure 3, the circuit includes：Power supply, circuit breaker Q F, time relay KT, time-delay relay SJ, contactor KM, buzzing
Device HD, emergency stop switch button JAT, starting switch button AT, intermediate relay K and heater J, ammeter A, comparator U1；
Wherein, which can be divided into voltage control circuit 31, time control circuit
33, test circuit 35 and electric current warning circuit 37.
Wherein, power supply includes L1 lines, L2 lines, N lines and E ground wires.
In voltage control circuit 31, the L1 lines and L2 lines of power supply are connected by circuit breaker Q F1 and transformer T-phase, transformer T
The 380V electricity that power supply provides is converted to the 450V electricity needed for test.Two output ends of transformer T respectively with first contactor
KM1 is connected with second contactor KM2, and the voltage of 450V is provided for first contactor KM1 and second contactor KM2.
Optionally, the electric shock of each contactor can be connected to the greatest extent with a test circuit 35.
In time control circuit 33, the first time for including connection with the disconnection for control contactor KM1 controls electricity
Road 331；With the second time control circuit 333 for being connected to disconnecting for control contactor KM2.
In first time control circuit 331, time relay normally closed contact KT, starting switch button AT, the first contact
Device coil KM1, time-delay relay coil SJ are sequentially connected in series, also, first contactor coil KM1 with connect after the time relay
Normally-closed contact KT and starting switch button AT are in parallel, for after pressing starting switch AT, making first contactor KM1 self-lockings.
In the second time control circuit 333, time-delay relay normally opened contact SJ, second contactor coil KM2, with timely
Between relay coil KT be sequentially connected in series, the second time relay normally open contact KM2 is in parallel with time-delay relay normally opened contact SJ.
Optionally, the second time relay KM2 not self-lockings.
Optionally, first time control circuit 331 is in parallel with the second time control circuit 333, the circuit on one side after parallel connection
It is connected with the L2 lines of power supply by an access of circuit breaker Q F1.
It should be noted that quickly the circuit of test ceramic PTC electric heater interpolar pressure resistance includes a plurality of test circuit 35,
Wherein, each contact of each contactor corresponds to a test circuit 35.
In being described below, by taking a wherein test circuit 35 (a) as an example, test circuit 35 (a) include forceful electric power circuit and
Weakness circuit, test circuit 35 (a) are made forceful electric power circuit in test circuit and are connect by the circuit breaker Q F2 of double-pole single-throw (D.P.S.T.) type
Tentaculum is connected, and keeps the light current circuit in test circuit in parallel with time control circuit.
It should be noted that in test circuit 35 (a), forceful electric power circuit can be heater circuit；Light current circuit can be with
It is failure alarm circuit.
In heater circuit, the first switch (the first knife) in the circuit breaker Q F2 of double-pole single-throw (D.P.S.T.) type is connected to heating
Between device J1 and voltage control circuit 31, connection and disconnection for controlling heater J1, in the case of heater J1 short circuits,
Circuit breaker Q F2 is disconnected.
In failure alarm circuit, the second switch (the second knife) in the circuit breaker Q F2 of double-pole single-throw (D.P.S.T.) type and alarm
It is connected with intermediate relay after 1HD parallel connections, in the case where circuit breaker Q F2 is closed, alarm 1HD is made to be short-circuited；In breaker
In the case that QF2 is disconnected, alarm 1HD is made to power alarm.
In electric current warning circuit 37, ammeter A is connected to heater circuit and voltage control electricity in test circuit 35
Between road 31, for the current value of heater during collecting test, and the current value is sent to comparator U1.
Optionally, comparator U1 is in the case where receiving the current value of ammeter offer, by the current value and predetermined threshold
Value is compared, and in the case where the current value is above or below predetermined threshold, control electric current warning circuit 37 is connected, wherein
Further include the alarm HD being connected with comparator U1 in electric current warning circuit 37, in comparator U1 control electric currents warning circuit 37
In the case of conducting, alarm HD starts to work.
Optionally, in the case where current value is more than (being higher than) predetermined threshold, comparator U1 is connected with upper change point, control electricity
Warning circuit 37 is flowed to be connected.
Optionally, in the case where current value is less than predetermined threshold, comparator U1 is connected with offline point, control electric current alarm
Circuit 37 is connected.
Optionally, the failure alarm circuit in test circuit 35, time control circuit 33, electric current warning circuit 37 pass through
The same circuit is connected with the N lines of power supply, wherein connection is by emergency stop switch button JAT on the circuit.In quick test ceramics
It, can be whole to disconnect by pressing emergency stop switch button JAT in the case that the circuit of PTC electric heater interpolar pressure resistance occurs promptly
The connection of a circuit ensures the safety of test circuit.
Optionally, the circuit of the heater circuit in test circuit 35 can share one with time control circuit 33 and return
Road.
Optionally, heater can be ceramic PTC electric heater.
It should be noted that according to basic electricity formula, there are certain relationships between electric current, voltage and resistance.Right
It, can be by measuring the electric current of ceramic PTC electric heater come real during ceramic PTC electric heater carries out interpolar voltage-withstand test
It is existing.
The utility model above-described embodiment carries out weight to the interpolar voltage-withstand test means of idle call ceramic PTC electric heater
It is new to improve design, all kinds of electronic components, instrument etc. are made full use of, realizes that the interpolar pressure resistance to ceramic PTC electric heater carries out
Quickly test.The specific method is as follows：
The electric heater of required test is linked into designated position in circuit, using transformer, voltmeter, ammeter, is prolonged
When relay specification electric heater the requirement of interpolar voltage-withstand test, pass through breaker, relay, buzzer, light emitting diode
Correlated response acts, and exports testing result, shows whether the interpolar voltage-withstand test of electric heater is qualified.
The utility model above-described embodiment can for the associated specifications of ceramic PTC electric heater interpolar voltage-withstand test
With by increased transformer, voltmeter, ammeter, the time relay (time-delay relay) in test circuit, realization is treated
The test environment (apply 450V voltages and continue 60S) for surveying ceramic PTC electric heater is set, is adjusted, and is that test environment reaches
Test request.
The utility model above-described embodiment is provided accurate by devices such as digital display voltmeter, digital display ammeter, time-delay relays
True data are shown, test environment can be made to meet test request, promote reliability, the accuracy of test result.
The utility model above-described embodiment can increase the test of ceramic PTC electric heater interpolar pressure resistance in circuit
Add acoustic-optic alarm, by acoustic-optic alarm can be promptly and accurately provide test result, avoid the occurrence of erroneous judgement.
During ceramic PTC electric heater interpolar voltage-withstand test, electric heater need to only be accessed in circuit, then be opened
Dynamic Switching Power Supply, you can realization automates the voltage-withstand test of ceramic PTC electric heater interpolar according to standard test requirements
Detection, without artificial observation test result.Multiple ceramic PTC electric heaters can be accessed test circuit by this means of testing simultaneously
In synchronize test, reach quickly test ceramic PTC electric heater interpolar pressure resistance, improve interpolar pressure resistance detection imitate
Rate.
The utility model above-described embodiment in entire circuit is pass in parallel between each ceramic PTC electric heater to be measured
System.Wherein, test philosophy is：With breaker (1), buzzer (1), relay (1), ceramic PTC to be measured electricity in circuit
Heater (1) is one group, builds 1 test cell (test circuit), and by parallel way by multiple test cells simultaneously
Access meets in the heater test circuit of test environment requirement, reaches while testing multiple ceramic PTC electric heaters to be measured
Effect.
To eliminate the error of ceramic PTC electric heater interpolar voltage-withstand test environment, ensure the accuracy of test data, every
Series connection access ammeter (setting upper lower limit value) in a test cell circuit, when above or below setting value, the output phase should be controlled
Signal processed controls buzzer warning in its corresponding circuits, the error of interpolar voltage-withstand test environment in being tested with control (elimination).
By examining actual verification, by improving idle call ceramic PTC electric heater interpolar voltage-withstand test means, can disappear
Except the error of ceramic PTC electric heater interpolar voltage-withstand test environment, avoids causing the unstable of test data, promote test result
Reliability, accuracy, prevent examine erroneous judgement.
Above-mentioned the utility model embodiment serial number is for illustration only, can not represent the quality of embodiment.
In above-described embodiment of the utility model, all emphasize particularly on different fields to the description of each embodiment, in some embodiment
The part not being described in detail may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, for example, the unit division, Ke Yiwei
A kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
It connects, can be electrical or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
On unit.Some or all of unit therein can be selected according to the actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the utility model can be integrated in a processing unit,
Can be that each unit physically exists alone, it can also be during two or more units be integrated in one unit.It is above-mentioned integrated
Unit both may be used hardware form realize, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can be stored in a computer read/write memory medium.Based on this understanding, the technical solution of the utility model sheet
The all or part of the part that contributes to existing technology or the technical solution can be with software product in other words in matter
Form embodies, which is stored in a storage medium, including some instructions are used so that a meter
It calculates machine equipment (can be personal computer, server or network equipment etc.) and executes each embodiment the method for the utility model
All or part of step.And storage medium above-mentioned includes：USB flash disk, read-only memory (ROM, Read-Only Memory), with
Machine access memory (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can to store journey
The medium of sequence code.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of heater test circuit, which is characterized in that including：
Control circuit, for controlling testing time and test voltage；
Multiple test circuits, the multiple test circuit parallel connection access the control circuit, for testing electricity to each of access
The heater on road is tested.
2. heater test circuit according to claim 1, which is characterized in that the control circuit includes：
Voltage control circuit, for controlling the test voltage；
Time control circuit, it is in parallel with the voltage control circuit, for controlling the testing time.
3. heater test circuit according to claim 2, which is characterized in that the voltage control circuit includes：
Transformer is connected with power supply, for the voltage of the power supply to be converted to the test voltage；
Contactor is connected between the transformer and the test circuit, for controlling the test circuit and the transformation
Connection between device and disconnection.
4. heater test circuit according to claim 3, which is characterized in that the contactor include first contactor and
Second contactor, the time control circuit include：
First time control circuit, the Lifetime for controlling the first contactor；
Second time control circuit, connection for control the second contactor in parallel with the first time control circuit
Time.
5. heater test circuit according to claim 4, which is characterized in that the first time control circuit includes：
Time relay normally closed contact, the connection for controlling the first time control circuit with time relay coil cooperation
Time；
Starting switch is connected with the time relay normally closed contact, the connection for controlling the first time control circuit；
First contactor coil is connected with the starting switch, for being powered after starting switch connection, control described the
One contactor is connected to；
First contactor normally opened contact, it is in parallel with the starting switch and the time relay normally open contact, for described
First contactor coil is closed in the case of being powered；
Relay coil is connected with the first contactor coil, for controlling relay work.
6. heater test circuit according to claim 5, which is characterized in that second time control circuit includes：
Relay switch, connection and disconnection for controlling second time control circuit with relay coil cooperation；
Second contactor coil, is connected with relay switch, for being powered in the case where the relay switch is connected to, controls
The second contactor is closed；
Time relay coil is connected with the second contactor coil, works for control time relay.
7. heater test circuit according to claim 2, which is characterized in that the test circuit includes：
Heater circuit is connected with the voltage control circuit, for testing the heater under the test voltage；
Failure alarm circuit, it is in parallel with the time control circuit, for alarming in the case of the heater short circuit.
8. heater test circuit according to claim 7, which is characterized in that the test circuit includes：
Breaker, wherein the breaker is double-pole single throw；
The heater circuit being connect with the voltage control circuit is provided in first access of the breaker, it is described disconnected
Road device in the case of the heater short circuit for disconnecting；
The failure alarm circuit is set in the alternate path of the breaker, wherein the alternate path of the breaker with
Alarm is in parallel, for controlling the alarm conducting in the case where the breaker disconnects.
9. heater test circuit according to claim 8, which is characterized in that the failure alarm circuit includes：
The alternate path of intermediate relay, the breaker is connected with after alarm parallel connection with the intermediate relay.
10. heater test circuit according to claim 2, which is characterized in that the heater test circuit further includes：
Electric current warning circuit, wherein the electric current warning circuit includes multiple ammeters, signal processing circuit, alarm；
Each ammeter in the multiple ammeter, be connected to each test circuit and the voltage control circuit it
Between, the current value for measuring the test circuit；
The signal processing circuit is in parallel with the time control circuit after connecting with alarm, wherein the signal processing electricity
Road is for controlling the alarm conducting in the case where the current value is above or below predetermined threshold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721473909.4U CN207817142U (en) | 2017-11-07 | 2017-11-07 | Heater test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721473909.4U CN207817142U (en) | 2017-11-07 | 2017-11-07 | Heater test circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207817142U true CN207817142U (en) | 2018-09-04 |
Family
ID=63333576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721473909.4U Active CN207817142U (en) | 2017-11-07 | 2017-11-07 | Heater test circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207817142U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907809A (en) * | 2017-11-07 | 2018-04-13 | 格力电器（合肥）有限公司 | Heater test circuit |
-
2017
- 2017-11-07 CN CN201721473909.4U patent/CN207817142U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907809A (en) * | 2017-11-07 | 2018-04-13 | 格力电器（合肥）有限公司 | Heater test circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1385015B1 (en) | Tester for a plurality of circuit breakers having a range of rated currents and multiple trip functions | |
| CN102608445B (en) | The test of transient voltage protection device | |
| CN103399229B (en) | Device for protection outlet of relay protection proving installation | |
| CN110470983A (en) | The fault detection system and its detection method of relay | |
| CN101366161A (en) | Receptacle providing sustained excessive voltage protection | |
| CN108199099A (en) | A kind of battery protecting apparatus and its control method | |
| CN105676091A (en) | Battery pack insulation detection apparatus and insulation detection method thereof | |
| CN113030636B (en) | Active intervention type arc suppression device test system | |
| CN102832591A (en) | Electricity leakage detecting protection circuit with function of lightning impulse resistance | |
| CN103701141B (en) | Novel multifunctional encoder switch | |
| CN207817142U (en) | Heater test circuit | |
| CN205542460U (en) | Intelligent circuit breaker system that can real -time measuring charges | |
| KR102205801B1 (en) | A detection circuit and a detection method for leakage resistance of floating independent direct current source | |
| CN203180512U (en) | Low tension side power supply surge protector | |
| CN203941249U (en) | A kind of lightning protection detection module | |
| CN203839955U (en) | Novel multifunctional code switch with communication module | |
| CN202870174U (en) | Low energy consumption circuit for detecting insulating resistance of DC bus | |
| CN107192912A (en) | Distribution box failure detector circuit | |
| CN102841309A (en) | Test device for circuit breaker | |
| CN105529737B (en) | Grid disconnection device and method | |
| CN106602522A (en) | Voltage transformer parallel apparatus and automatic parallel control logic thereof | |
| CN107907809A (en) | Heater test circuit | |
| CN102169144B (en) | Direct-current interference testing device and system | |
| CN108680804A (en) | AC and DC resistance load system based on bus marco and control method | |
| CN110082613A (en) | A kind of main circuit of wind power converter connection state detection system and detection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |