CN2906896Y

CN2906896Y - Heating time control device

Info

Publication number: CN2906896Y
Application number: CN 200520116447
Authority: CN
Inventors: 杨奕
Original assignee: NINGBO JINHAI ELECTRONIC CO Ltd
Current assignee: NINGBO JINHAI ELECTRONIC CO Ltd
Priority date: 2005-11-12
Filing date: 2005-11-12
Publication date: 2007-05-30
Anticipated expiration: 2015-11-12

Abstract

The utility model relates to a heating timer controller, which comprises a heat transfer plate on the casing surface, a dynamic and a static contact in the casing as well as a wiring terminal outside of the casing; the outer bottom of the heat transfer plate contacts closely with PTC heat flake, and the interior bottom is provided with a bimetallic actuating sheet; the dynamic reed is provided with a leg extending downwards to the middle section of the bimetallic actuating sheet; a dynamic contact is protruded from left upper hand of the dynamic reed, the right upper hand of dynamic reed is pressed on the restoring reed by the rack of the dynamic reed; the restoring reed is arranged in the dynamic reed frame, and flexibly contacts with left and right ends of the dynamic reed. The PTC heat flake and the bimetallic actuating sheet can bounce and restore their temperature within a period of time, enabling continuous switching-on/off of circuit. Unlike the common temperature control products depending on ambient temperature, the utility model replaces the driving of ceramic post rod by the linkage of restoring and dynamic reeds, and also improves the reliability of controllers since 24V AC power supply for PTC has no hazard through heating by thermal resistor.

Description

Hot controlling timer

Technical field

The utility model relates to a kind of delay controller, particularly utilizes the delay switch of heat energy distortion touch switch action.

Background technology

Hot controlling timer is mainly used in the heat pump of air-conditioning system and the delay protection of fan, and the delay cut-off characteristic by hot controlling timer behind motor starting is to the motor ventilation and heat protection of delaying time, to reach the purpose of not only protecting motor but also energy savings.Can carry out the switching device of delay cut-off protection; all adopted the bimetallic braking plate closely to contact with heating position in the past; make the powered one porcelain rod of bimetal leaf thermal deformation; rely on that the porcelain rod is passive pushes one group of contact open; because the no initiative ability of porcelain rod; and resistance is big, so reliability and fail safe are relatively poor.CN2350861Y proposes a kind of temperature detect switch (TDS) of forming with the PTC thermistor and the bimetal leaf of positive temperature coefficient, on the power series bimetal leaf moving contact, thermistor is located at the middle place of bimetal leaf end face, open contact switch by the bimetal leaf thermal deformation, and power supply source is connected on bimetal leaf and the PTC, have potential safety hazard, this electric heating appliance can not hot line job, and the safety devices that for this reason must increase many insulation are safe in utilization to guarantee.

Summary of the invention

The purpose of this utility model is at the existing defective of the automatic temperature-limiting device of above-mentioned electric heating appliance, designs a kind of hot controlling timer, a kind of heat of new construction time-delay automatic temperature controller, have reaction fast, good reliability, technical performance safe in utilization.

The technical scheme that the utility model adopted is, hot controlling timer, it comprises the heat transfer dish of being located at the housing one side, is located at the dynamic and static contact in the housing and is located at the outer binding post of housing, it is characterized in that PTC heating sheet is close in the bottom surface outside the heat transfer dish, the bimetallic braking plate is established in the bottom surface within the heat transfer dish; One movable contact spring, it has one to stretch to the haptic element to bimetallic braking plate middle part downwards, the left upper end of movable contact spring has outstanding moving contact, and the upper right side of movable contact spring is pressed on reseting leaf by moving spring bracket: described reseting leaf is located in the movable contact spring frame and is movable with the left and right end of movable contact spring and contacts.

Described PTC heating sheet is the semistor of barium titanate ceramics material, when PTC and AC power are joined, the characteristic of utilizing one time of its electric current characteristic and himself heating resistor to raise and increase with temperature, make the bimetallic braking plate take-off or the answer in the regular hour scope that closely contact with it, thereby the contact is disconnected or closed and constantly circulation, reach time-delay cut-out or time-delay and connect the effect of circuit, it realizes that with outer boundary ambient temperature the temperature control product of control has significantly different, it is the impetus that replaces ceramic push rod with the interlock effect of reseting leaf and movable contact spring, improve controller reliability, there is not hidden danger safe in utilization with the 24V ac power supply in PTC through the thermistor heating.

Description of drawings

Fig. 1 is the utility model section of structure, the expression contact closure condition.

Fig. 2 is that Fig. 1 is at contact off-state section of structure.

Fig. 3 represents the combining structure stereogram of dynamic and static spring bracket, movable contact spring and reseting leaf in the housing.

Among the above-mentioned figure, 1 is binding post, and 2 are moving spring bracket, 3 is movable contact spring, and 4 is reseting leaf, and 5 is insulating trip, 6 is the bimetallic braking plate, 7 are PTC heating sheet, and 8 are the heat transfer dish, and 9 is fixed contact, 10 is moving contact, 11 is quiet spring bracket, and 12 is housing, and 31 is movable contact spring left end moving contact, 32 is the movable contact spring moulding, 33 is to stretch haptic element under the movable contact spring, and 34 is the right elbow of movable contact spring, and 41 is the reseting leaf ramp, 42 is the reseting leaf left tilted surface, 43 is the reseting leaf bottom surface, and 44 is the reseting leaf right tilted surface, and 45 is breach on the reseting leaf right tilted surface.

Embodiment

Below in conjunction with Fig. 1 and Fig. 3 the utility model example structure is described further.

Figure 1 shows that along two binding posts, 1 centre section structure.PTC heating sheet 7 is close to the outer bottom of heat transfer dish 8, and bimetallic braking plate 6 is placed on the inner bottom surface of heat transfer dish 8, and with PTC heating 7 corresponding being close to keep good thermo-contact of sheet, the bimetallic braking plate is circular video disc.The topped one deck insulating trip 5 of face on bimetallic braking plate 6, its diameter are equivalent to the diameter of heat transfer dish 8 to guarantee each part isolated insulation in the housing.Housing 12 is hollow circuit cylinder or square body, upper end closed, lower ending opening.Establish the moving spring bracket 2 and the quiet spring bracket 11 that are parallel to each other in housing 12 chambeies, and fix with housing 12 upper ends.Quiet spring bracket 11 is the framework of hollow, on its framework base, establish fixed contact 9, one movable contact spring, 3 crossbearers are in moving, between the quiet spring bracket, the left upper end 31 of movable contact spring 3 be moving contact 10 down, it and fixed contact 9 corresponding movable contacts, the upper right side of movable contact spring becomes right elbow 34 towards lower bending shape, breach 45 tablings on it and the reseting leaf right tilted surface, the middle part of movable contact spring 3 is to recessed and formation rectangle moulding 32, reseting leaf 4 is the elastic spring through three sections invaginations, by last volume face 41 is to lower inclined plane, and left volume face 42 is the inclined-plane, horizontal plane bottom surface 43 and right volume face 44 gaps 45 inclined-planes are formed.Reseting leaf 4 is in the rectangle moulding of movable contact spring 3, and its left tilted surface 42 is movable with the left and right moulding of movable contact spring 3 respectively with right tilted surface 45 and contacts.The ramp 41 of reseting leaf 4 and the moulding 32 of movable contact spring are pressed in moving spring bracket 2 lower ends, so that the last breach 45 of movable contact spring elbow 34 and reseting leaf right tilted surface is interlocked, form a rotating fulcrum.Another new construction of the present utility model is exactly to form rotating lever mechanism by moving spring bracket 2, movable contact spring 3 and reseting leaf 4, and by movable contact spring form one following stretch to offset in the middle of haptic element 33 and the bimetallic braking plate contact.

Sketch the course of action of embodiment below in conjunction with Fig. 1, Fig. 2 and Fig. 3.

When 7 energisings of PTC heating sheet, heat up along with the increasing of electric current, temperature rise is during to bimetal leaf 6 activation temperature, as shown in Figure 2, arch upward and to stretch haptic element 33 jack-up under the movable contact spring in the middle of the bimetal leaf, movable contact spring is subjected to spring bracket control and clockwise rotates, left moving contact 10 away from the movable contact spring of fulcrum is lifted and separate, thereby cut off the electricity supply with fixed contact 9.When raising, be in movable contact spring moulding 32 interior reseting leafs 4 also to be lifted by jack-up at movable contact spring, reseting leaf 4 is subjected to spring bracket 2 pressure and is out of shape at this moment, and this distortion makes reseting leaf 4 produce the internal memory restoring forces.When restoring when the bimetal leaf cooling, the restoring force of storing in the reseting leaf discharges and promotes movable contact spring 3 inhour actions, makes the moving contact 10 and fixed contact 9 closures of movable contact spring 3.Because the curling elastic force of reseting leaf 4 is enough to make deciliter action convenient power-saving, the working stability of moving contact reliable, improves effectiveness and increases the service life simultaneously.

Claims

1, hot controlling timer, it comprises the heat transfer dish (8) of being located at housing (12) face, be located at the dynamic and static contact (10,9) in the housing and be located at the outer binding post (1) of housing, it is characterized in that PTC heating sheet (7) is close in the bottom surface outside the heat transfer dish, bimetallic braking plate (6) is established in the bottom surface within the heat transfer dish; One movable contact spring (3), it has one to stretch to the haptic element (33) to bimetallic braking plate middle part downwards, and the left upper end of movable contact spring has outstanding moving contact (10), and the upper right side of movable contact spring is pressed on reseting leaf (4) by moving spring bracket (2); Described reseting leaf (4) is located in the movable contact spring frame and is movable with the left and right end of movable contact spring and contacts.

2, hot controlling timer according to claim 1 is characterized in that forming rotating lever mechanism by moving spring bracket (2), movable contact spring (3) and reseting leaf (4).

3, hot controlling timer according to claim 1 and 2 is characterized in that the downward spill in middle part of movable contact spring (3) becomes rectangle moulding (32), and reseting leaf (4) is in the rectangle moulding (32) of movable contact spring (3).

4, hot controlling timer according to claim 1 and 2 is characterized in that reseting leaf (4) is the elastic spring through three sections invaginations.

5, hot controlling timer according to claim 1 and 2, it is characterized in that movable contact spring (3) crossbearer is between dynamic and static spring bracket, the left upper end of movable contact spring (3) is moving contact (10) and corresponding with fixed contact (9) down, and the upper right side of movable contact spring (3) becomes the elbow (34) that is interlocked with the right breach of reseting leaf (4) (45) towards lower bending shape.

6, hot controlling timer according to claim 1 is characterized in that top topped one deck insulating trip (5) of bimetallic braking plate (6).