CN102882186B - Novel temperature sensing type air current switch - Google Patents
Novel temperature sensing type air current switch Download PDFInfo
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- CN102882186B CN102882186B CN201210421646.8A CN201210421646A CN102882186B CN 102882186 B CN102882186 B CN 102882186B CN 201210421646 A CN201210421646 A CN 201210421646A CN 102882186 B CN102882186 B CN 102882186B
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- sensing type
- switch
- tds
- current switch
- heater
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Abstract
The invention discloses a novel temperature sensing type air current switch. The temperature sensing type air current switch is fixed in an air channel of a DC (direct current) motor and connected with a relay and a main control circuit of the DC motor; and the temperature sensing type air current switch comprises a heating body and a temperature control switch which is connected with the heating body and used for detecting the temperature change of the heating body. The temperature sensing type air current switch disclosed by the invention can prevent the DC motor from being burnt out.
Description
Technical field
The present invention relates to a kind of temp sensing type current switch.
Background technology
In modern industry application, the effect of direct current machine is that direct current energy is converted to mechanical energy, the advantages such as DC motor has that good speed adjustment features, starting torque are large, the linearity high overload multiple of mechanical property and governor control characteristics is large, control performance is good, require higher place at speed adjusting performance, applied all widely.
Direct current machine is made up of excitation, armature, commutator, produces a large amount of heats, need blower fan air blast cool during the work of excitation, armature, if excitation can not get cooling, can Yin Wendu too high and cause and burn, make direct current machine generation " driving " phenomenon and damage.Thus blower fan is one of key of direct current machine steady running.The manufacturer of the current domestic direct current machine of thin sight, does not all add safeguard measure to this.So because of blower fan malfunctioning, one of major failure excitation being burnt become direct current machine to damage.
Summary of the invention
The object of this invention is to provide a kind of temp sensing type current switch, direct current machine can be protected to make it avoid being burnt.
For achieving the above object, the invention provides a kind of temp sensing type current switch, described temp sensing type current switch is fixed in the air channel of direct current machine, connect the governor circuit of a relay and direct current machine, the temperature detect switch (TDS) for detecting described heater variations in temperature that described temp sensing type current switch comprises heater and is connected with described heater.
Preferably, also comprise folder, described folder clamps described heater and described temperature detect switch (TDS).
Preferably, also comprise shell, the front end of described shell is coated on the periphery of the rear end of described heater and described temperature detect switch (TDS), and the front end of described heater and described temperature detect switch (TDS) and described folder are emerging in the outside of described shell, and described shell is fixed in the air channel of described direct current machine.
Preferably, described shell is hollow cylinder, and the outer wall of cylinder is provided with screw thread, and the outer wall of cylinder has been threaded connection nut.
Preferably, the rear end of described shell is connected with turncap, and described turncap offers through hole, and the diameter of described through hole is less than the internal diameter of described shell.
Preferably, also comprise external lead wire, described external lead wire is connected to described heater and described temperature detect switch (TDS) through inside described through hole and described shell.
Preferably, described heater selects resistance-type heating bar.
Preferably, described temperature detect switch (TDS) adopts packaged type.
Compared with prior art; temp sensing type current switch of the present invention is fixed in the air channel of direct current machine; and the temperature detect switch (TDS) for detecting described heater variations in temperature heater being set and being connected with described heater; the height of heater temperature is detected by temperature detect switch (TDS); blower fan can be detected whether run well; when blower fan is malfunctioning; the temperature detect switch (TDS) of temp sensing type current switch can produce an alarm signal; cut off field power supply; and motor is shut down; thus protection direct current machine, make direct current machine avoid burning.
By following description also by reference to the accompanying drawings, the present invention will become more clear, and these accompanying drawings are for explaining embodiments of the invention.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of temp sensing type current switch of the present invention.
Fig. 2 is the circuit diagram that current switch and relay are connected on direct current machine governor circuit.
Embodiment
With reference now to accompanying drawing, describe embodiments of the invention, element numbers similar in accompanying drawing represents similar element.
Please refer to Fig. 1, Fig. 1 is the structural representation of temp sensing type current switch, and described temp sensing type current switch is fixed in the air channel of direct current machine, and it comprises heater 1, temperature detect switch (TDS) 2, folder 3, shell 4, nut 5, turncap 6 and external lead wire 7.
Specifically, described heater 1 selects resistance-type heating bar.Together with described temperature detect switch (TDS) 2 and described heater 1 are clamped and connected by described folder 3, described temperature detect switch (TDS) 2 is for detecting the variations in temperature of described heater 1, described temperature detect switch (TDS) 2 adopts packaged type, the back of described temperature detect switch (TDS) 2 is piece of metal blocks, has that temperature-sensitive area is large, the feature of good heat conduction effect.The front end of described shell 4 is coated on the periphery of the rear end of described heater 1 and described temperature detect switch (TDS) 2, the front end of described heater 1 and described temperature detect switch (TDS) 2 and described folder 3 are all emerging in the outside of described shell 4, and described shell 4 is fixed in the air channel of direct current machine, described shell 4 is hollow cylinder, and the outer wall of cylinder is provided with screw thread.Described nut 5 is threaded connection on the outer wall of cylinder.Described turncap 6 is fixed in the rear end of described shell 4, and described turncap 6 offers through hole 61, and the diameter of described through hole 61 is less than the internal diameter of described shell 4, and described turncap 6 not only may be used for fixing, and can seal, and prevents air quantity to run off too much.Described external lead wire 7 is connected to described heater 1 and described temperature detect switch (TDS) 2 through inside described through hole 61 and described shell 4.
Please refer to Fig. 2, Fig. 2 is the circuit diagram that current switch and relay are connected on direct current machine governor circuit, described temp sensing type current switch GF connects the governor circuit of a relay J and direct current machine, the governor circuit of direct current machine has an one pole air switch HK.The operation principle of temp sensing type current switch is as follows:
Add 24V alternating voltage to described heater 1, make described heater 1 be in heating febrile state, detect the change of its temperature with miniature temperature detect switch (TDS) 2, correspondingly export a switching value by described relay J.When blower fan runs well, have wind flow in air channel, certain heat that described heater 1 produces is taken away, now, described temperature detect switch (TDS) 2 is failure to actuate; When blower fan is malfunctioning do not turn time; when just not having wind flow or wind-force very little in air channel; the temperature that described heater 1 produces constantly raises, after 50 DEG C, and the action at once of described temperature detect switch (TDS) 2; relay J is made to obtain electronic work; main control circuit to direct current machine sends the signal of an overtemperature, cuts off field power supply, and stops direct current machine operating; thus protect direct current machine, make direct current machine avoid being burnt.When the working temperature finding temperature detect switch (TDS) 2 in test is 50 DEG C, the remolding sensitivity of described temp sensing type current switch GF is higher, and versatility is good.And the stable performance of described temp sensing type current switch, compact conformation, volume is little, cost is low.
More than in conjunction with most preferred embodiment, invention has been described, but the present invention is not limited to the embodiment of above announcement, and should contain various carry out according to essence of the present invention amendment, equivalent combinations.
Claims (6)
1. a temp sensing type current switch, it is characterized in that: described temp sensing type current switch is fixed in the air channel of direct current machine, connect the governor circuit of a relay and direct current machine, the temperature detect switch (TDS) for detecting described heater variations in temperature that described temp sensing type current switch comprises heater and is connected with described heater, also comprise folder and shell, described folder clamps described heater and described temperature detect switch (TDS), the front end of described shell is coated on the periphery of the rear end of described heater and described temperature detect switch (TDS), the front end of described heater and described temperature detect switch (TDS) and described folder are emerging in the outside of described shell, and described shell is fixed in the air channel of described direct current machine.
2. temp sensing type current switch as claimed in claim 1, is characterized in that: described shell is hollow cylinder, and the outer wall of cylinder is provided with screw thread, and the outer wall of cylinder has been threaded connection nut.
3. temp sensing type current switch as claimed in claim 2, it is characterized in that: the rear end of described shell is connected with turncap, described turncap offers through hole, and the diameter of described through hole is less than the internal diameter of described shell.
4. temp sensing type current switch as claimed in claim 3, is characterized in that: also comprise external lead wire, and described external lead wire is connected to described heater and described temperature detect switch (TDS) through inside described through hole and described shell.
5. temp sensing type current switch as claimed in claim 1, is characterized in that: described heater selects resistance-type heating bar.
6. temp sensing type current switch as claimed in claim 1, is characterized in that: described temperature detect switch (TDS) adopts packaged type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210421646.8A CN102882186B (en) | 2012-10-26 | 2012-10-26 | Novel temperature sensing type air current switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210421646.8A CN102882186B (en) | 2012-10-26 | 2012-10-26 | Novel temperature sensing type air current switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102882186A CN102882186A (en) | 2013-01-16 |
| CN102882186B true CN102882186B (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210421646.8A Active CN102882186B (en) | 2012-10-26 | 2012-10-26 | Novel temperature sensing type air current switch |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60257737A (en) * | 1984-06-05 | 1985-12-19 | Fuji Electric Co Ltd | Cooler of fully-closed electric device |
| US4698756A (en) * | 1985-07-16 | 1987-10-06 | Westinghouse Electric Corp. | Generator stator winding diagnostic system |
| CN102243956B (en) * | 2011-04-19 | 2014-07-09 | 襄阳冲亚电器有限公司 | Protective switch of motor |
| CN202906443U (en) * | 2012-10-26 | 2013-04-24 | 广州电缆厂有限公司 | Novel temperature-sensing air current switch |
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2012
- 2012-10-26 CN CN201210421646.8A patent/CN102882186B/en active Active
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| CN102882186A (en) | 2013-01-16 |
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