CN202034304U - Active time delay temperature control switch - Google Patents

Abstract

The utility model discloses an active time delay temperature control switch, which is used for short-circuit and over-load protection over power. A conductive coil is wound on a shell; a partition plate 1 and a bimetallic strip are built in the shell; a partition plate 2 is arranged on the lower part of the partition plate 1; a movable contact piece and a fixed contact piece penetrate through the partition plate 2 respectively, and two contacts correspond to each other; a guide rod passes through the partition plate 1 and the fixed contact piece, and the two ends of the guide rod are contacted with the bimetallic strip and the movable contact piece respectively; the lower part of the shell is connected with a baffle; and the shell and the baffle are provided with outer edges for preventing the conductive coil from sliding off. When current flows through the conductive coil, the coil heats; when higher current passes through the coil, heat is conducted through the shell to heat the bimetallic strip; the bimetallic strip is deformed when reaching a critical temperature thereof; the movable contact piece is separated from the fixed contact piece through the guide rod, so that the switch is turned off; and on the contrary, the switch is turned on. The switch is low in cost and has high reliability; abnormal protection caused by instantaneous overload of an air switch and the like can be avoided; normal use of a load and a wire can be effectively guaranteed; and the safety of the power wire and the load can be guaranteed under various environments.

Description

Active time-delay temperature-control switch

Technical field

The utility model relates to electric equipment control technology field, especially for the time-delay temperature-control switch of short circuit on the electric power, overload protection.

Background technology

Temperature detect switch (TDS) commonly used has two kinds of electronic type and expansion of metal formulas, and electronic type generally is that temperature sensor is attached on the heater, then by the comparator or the microcontroller design temperature upper limit, and when motor temperature arrives this upper limit, the start-up control switch.Sort controller control precision height, but cost height, complex structure, and poor reliability should not be used for the control and the protection of electrical lead and load; The control principle of expansion of metal formula is to adopt metal pair of different gold plaque of the coefficient of expansion, when temperature arrives its zero boundary's point, two gold plaques bend, touch or cut-off switch, play the effect of temperature detect switch (TDS), but it is bigger to plant the general volume of switch, also is difficult to control electrical lead and load overload time.

Summary of the invention

For solving lead because the lead that short circuit or overload cause blows or the damage of load; the problems such as improper protection that instantaneous overload causes; goal of the invention of the present utility model is to provide a kind of active time-delay temperature-control switch, to realize ensureing the purpose of electrical lead and payload security under various environment.

For achieving the above object, the technical solution of the utility model is: be wound with conductive coil on the shell, dividing plate one is housed in the shell, and one built-in pair of gold plaque of dividing plate, gapped between dividing plate one and the two gold plaque; Dividing plate two is contained in the bottom of dividing plate one, and it is corresponding that movable contact spring and static contact pass dividing plate two, two contacts respectively; Guide rod passes dividing plate one, static contact contacts with movable contact spring, and the bottom of shell connects baffle plate, and shell and baffle plate have the outer that prevents the conductive coil landing.

Temperature detect switch (TDS) shell of the present utility model is made by metal, is convenient to heat conduction, and case surface is wound with conductive coil, by size of current control caloric value, thus the switching of control temperature detect switch (TDS), to reach the purpose of current limliting, overload and short-circuit protection.When conductive coil alives, coil heating, if when the electric current that passes through is big, heat is after the shell conduction, and the two gold plaques of heating deform when two gold plaques reach its zero boundary's temperature, by guide rod movable contact spring are separated with static contact, and switch disconnects; When temperature reduces, be lower than bounce-back 1 boundary's point, two gold plaque bounce-backs, switch closes.

The utility model compared with prior art, cost is low, the reliability height, the improper protection of having avoided air switch etc. to cause owing to instantaneous overload, the effectively normal use of proof load and lead can ensure electrical lead and payload security under various environment.

Description of drawings

Fig. 1 is a stereogram of the present utility model;

Fig. 2 is the cutaway view of Fig. 1.

Embodiment

As shown in Figure 1 and Figure 2, be wound with conductive coil 3 on the shell 1, dividing plate 1 is housed in the shell 1, one 10 built-in pairs of gold plaques of dividing plate 8, gapped between dividing plate 1 and the two gold plaque 8; Dividing plate 2 11 is contained in the bottom of dividing plate 1, and movable contact spring 5 passes dividing plate 2 11 respectively with static contact 7, and two contacts are corresponding, and dividing plate 2 11 is made by resistant to elevated temperatures insulating material and formed; Guide rod 9 passes dividing plate 1, static contact 7 contacts with movable contact spring 5, and the bottom of shell 1 connects baffle plate 4, and shell 1 has the outer with baffle plate 4, to make things convenient for coiling, prevents the coil landing of scattering.

Metal shell 1 plays conductive force on the one hand, and the heat conduction that conductive coil 3 is produced is to two gold plaques 8.When the electric current that passes through conductive coil 3 inlet wire lead ends 6 and outlet lead end 2 is big, conductive coil 3 heatings, heating shell 1.When its zero boundary temperature of temperature arrival of two gold plaques 8, the edge of two gold plaques 8 is upturned, and is middle to lower process, after dividing plate one 10 guiding, guide rod 9 promoted downwards, and the movable contact spring 5 of temperature detect switch (TDS) separates with static contact 7, and temperature detect switch (TDS) disconnects.When the temperature reduction, two gold plaques 8 recover the conducting again of the contact of temperature detect switch (TDS).

Claims (3)

1. an active time-delay temperature-control switch is characterized in that: be wound with coil (3) on the shell (1), dividing plate one (10) is housed in the shell (1), dividing plate one (10) built-in pairs of gold plaques (8); Dividing plate two (11) is contained in the bottom of dividing plate one (10), and movable contact spring (5) passes dividing plate two (11) respectively with static contact (7), and two contacts are corresponding; Guide rod (9) passes dividing plate one (10), static contact (7), and two ends contact with movable contact spring (5) with two gold plaques (8) respectively, and the bottom of shell (1) connects baffle plate (4).

2. active time-delay temperature-control switch according to claim 1 is characterized in that: shell (1) has the outer that prevents coil (3) landing with baffle plate (4).

3. active time-delay temperature-control switch according to claim 1 is characterized in that: gapped between dividing plate one (10) and the two gold plaque (8).

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