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Method and apparatus for controlling the resistance of a thermistor device without

Method and apparatus for controlling the resistance of a thermistor device without

The present invention relates to a method of controlling failure of a thermistor device side
Method and apparatus. For example, for a thermistor device comprising a support, then
Touch and offset column is configured as a secondary failure thermistor "Pearl" of
Fracture, the broken fragments of beads and dispersed away from the conductive contact
Compartments to minimize arcing and overheating.

An electronic device comprising:
Electronic components, with the opposite side, a first electrode and a second electrode located on the opposite side of the electronic component, the
Electronic component having an outer side wall portion connected to the opposite side surface of said side wall portions defining said electronic component
Zhou;
The first elastic support comprising a first contact portion in contact with said first electrode;
The second elastic support comprising a first electrode in contact with the first contact portion with the position of the second type
Contact portion;
A third support, is set to be closer to the first contact portion and said second contact portion of said electronic element compared
A central member, and includes a third contact portion in contact with the second electrode;
A pair of offset column is disposed on the same side of said electronic element and said third support, and each of which
Having an end portion has pointed; and
Wherein each of said tip and said first contact portion and said second contact portion by said electrically closer compared
Child element and the centroid axis substantially perpendicular to the electronic element.
2 A device according to claim 1, wherein the third support is an elastic support.
3 A device according to claim 1, wherein said two offset columns of electronic components are separated, with the first
And a second electrode electrically insulated from the third contact portion are arranged.
4 A device according to claim 3, wherein the two offset columns of the electronic components are separated from the opening near the 0-2
Between mm.
5 device according to claim 1 or claim 2, wherein each tip comprises one of the following:
Tilt the cutting cross-section; and
Circular cross-section.
6 A device according to claim 1, further comprising a pair of contact alignment post, and located adjacent to the third support by
On the opposite side of the shaft.
7 6, wherein the device is formed of claim wherein the offset and the corresponding contact in the column between the alignment posts
Compartment to collect the broken pieces of the electronic component and to said first, second, and third contact portion of the insulating.
8 A device according to claim 1, wherein the buttress is located on the plane including the opposite side of the shaft,
And said first and said second contact portion of each contact portion is arranged closer to a corresponding offset from the column
Said outer periphery of said electronic element.
9 A device according to claim 1, wherein said column is arranged offset closer to the support than the third
The outer periphery of the electronic component.
10 A device according to claim 9, wherein said first and second resilient supporting each include suspending
Arm spring.
11 A device according to claim 1, wherein said first and second resilient supports, and a respective first and second
Second contact portions are applied first force and the second force on the electronic device, and by the third support and said third
The third force is exerted against the contact portion; and
Wherein the third force is greater than the first force, and the third force is greater than the second force.
12 Device according to claim 11, further comprising:
Terminal connector is disposed substantially parallel to the electronic component mounted to, and the third end of said support
End connector; and
Wherein said third force along the axis is substantially perpendicular to the electronic pointing device.
13 A device according to claim 11, wherein the first force and the second force in each group having a
The components of the electronic component perpendicular to the force point and the components of the force directed to the outer periphery of the electronic component.
14 A device according to claim 1, wherein said electronic element comprises a positive temperature coefficient PTC thermistor disc.
15 A device according to claim 1, further comprising a housing which accommodates the integration of devices and motor protection.
16 A device according to claim 1, wherein the third support comprises a fusible connection, once melted will eliminate
Said third contact portion and the second electrode in electrical contact.
17 An electronic device comprising:
Electronic components, and having a side opposite the first electrode having the opposite side of said electronic component on the second
Electrode, said electronic component having a side wall portion connecting the opposite side of the surface of the sidewall portion defining said electrical
The outer periphery of the sub-components;
A first connector terminal, electrically coupled to the first and second elastic support elastically supporting the first and the elastic support comprises
A first contact portion contacting said first electrode and said second resilient support comprises a first contact with the different parts of the
At a position in contact with the second contact portion of the first electrode;
A second end connector with a first end disposed on the different sides of the electronic device and electrically coupled to the third
Support, and includes a third contact portion in contact with the second electrode is set as the first contact portion and said
The second contact portion is closer to the center than said electronic component;
One pair of the column offset, and spaced from the electronic component and the electronic element and the first contact portion, the
Said second contact portion and the third contact portion is electrically insulating, the offset on the side of said second column electrode,
Each of the outer columns have the tip of the offset, the offset of the third support pillar is closer than the electronic component
Week, and the ratio of the center and closer to the first contact portion of said second electronic component contact portion;
Aligning a pair of contact column is disposed adjacent to and partially surrounding said third support;
Wherein said electronic element comprises a positive temperature coefficient PTC thermistor disc; and
Wherein the offset is set so that the column portion of the electronic component fracture Fracture dispersion to said electronic element so as to eliminate
Electrical contact member and the contact portion and the minimum portion of the arc discharge between the fracture.
18 A guide breakable part is broken so that the electronic components to eliminate the electrical contact of the electronic component and the minimum
Arc discharge method and the contact portion between the portion of the fracture, comprising:
Providing a housing and disposed in said housing on one side of a first electronic element and the second spring contact spring
Touch on;
In the housing, there is provided a pair of offset on opposite sides of said column of electronic components, the power offset of the column and does not
Sub-element contact, which is provided between the third contact;
Before breaking, by said first and said second spring contact of the spring contact and the third contact is elastically supported
Supporting said electronic component; and
Once the electronic component fracture:
Forcing said electronic component in contact with the pair of column offset; and
So that the dispersion break away from the third contact portion.
The method according to claim 18, wherein said dispersion comprises about the broken part of the column offset
The outer part of the rotation of the fracture.
20 The method of claim 18, wherein, wherein said cantilevered spring contact is a spring contact.

Method and apparatus for controlling the resistance of a thermistor device without
Technical field
[0001] The present invention relates generally to the motor starting device, and more particularly relates to an improved positive temperature control failure
Coefficient (PTC) thermistor device.
BACKGROUND
[0002] Most small compressors for refrigeration equipment must conform compressor start / auxiliary motor winding PTC heat
Sensitive resistor to provide a phase shift in the start / auxiliary winding of the motor windings and between the main motor and compressor motor needs
Reduce start / auxiliary winding current reaches its operating device for the rotational speed. Thermistor (commonly referred to beads
(Pill)) may be entered as "heat dissipation" state, the state is the failure mode in this period, the resistance of the thermistor
Typically significantly exceeds the steady state (self-adjusting) resistance, and more than the maximum resistance (RMAX) value, after which the resistance
And since the current value is reduced as a result of making the thermistor to increase the speed control is not heated. One possible
Thermistor failure mode is breakage due to thermal stress which occurs.
[0003] transfer to Murata Manufacturing Co., Ltd., U.S. Patent No. 6,172,593 describes the present
Art device, and a spring contact having a non-conductive support column during the normal life of the thermistor
Remain in contact with the thermistor. Because the thermistor is used to start the refrigerator compressor is usually switched (high impedance) state
Autotuning 160 ℃ -170 ℃, so close contact with the thermal resistance of the electrode materials have a higher relative temperature
Index (RTI), which is even more expensive。 Furthermore, this embodiment a portion of the thermistor to the tension and compression on the opposite side of the beads, the
Those near the other end of the power thermistor reverse. Unfortunately, in some cases, if the beads are not in the current stops
Burst mode, the split bead portion (also referred to as fragments) in electrical contact with the internal terminal, which may cause an arc discharge
Power and overheating.
[0004] In the refrigeration apparatus, a fault in the beads, a more reliable, more cost design to minimize arcing, electric
Flow and subsequent overheating. Traditional thermistor devices are not always in the thermistor failure to eliminate excessive overheating and arcing
The way the fault.
SUMMARY OF THE INVENTION
[0005] The conventional thermistor device can not fully eliminate the problem of overheating and arcing faults in the inner member, which
Because some debris remains sandwiched between the conductive member.
[0006] In one embodiment of the present invention, an electronic device includes an electronic element having opposite sides, a first electrode and
Said second electrode is located on the opposite side of the electronic component, said electronic component having a side wall connecting the opposite side portions
Of the surface of the sidewall portion defining an outer periphery of said electronic element; first resilient support, the first electrode comprising
A first contact portion of the contact; and a second elastic support, including the first contact portion and the different positions
A first electrode contacting said second contact portion。 Said device further comprising a third support, is provided to the first contact portion and
Said second contact points and the portion closer to the center as compared to electronic components, and includes a second electrode in contact with the
The third contact portion; column and a pair of offset, is disposed on the same side of said electronic element and said third support, and
And which each have an end portion has a tip; and wherein each of said tip and said first contact portion and the second
Compared to the second contact portion is closer to the centroid of the electronic component by a substantially vertical axis and to the electronic components. On
Described design advantageously provides a dynamic force and the fulcrum position more preferably arranged so that after failure of minimizing undesirable electrical
Connection.
[0007] In a particular embodiment, the first and second elastic support elastically supporting the respective first and second contact portions
Respectively, a first contact portion and second forces applied on the electronic element supported by the third and the third contact portion is applied
The third force confrontation, and the third force is greater than the first force itself or a second force. Such a force distribution improves the fault condition
Scattered debris.
[0008] Other embodiments provide an elastic third support having a circular cross-sectional profile or cut diagonally offset column
And the offset of the electronic component separated from the column. Such features can provide a better and more efficient electrical contact away from the conductive pieces
Tablets dispersed to minimize arcing and overheating.
[0009] In other embodiments, the first and second elastic support elastically supporting each include a cantilever spring. By
Cantilever spring, additional force may be applied to make a dispersion of debris away from the bead breaking electrical contact。 In another aspect of the invention
, The third support includes at least one fusible connection and spring back, in response to the electronic components for the Elimination of the fault
Three electrical contact portion in contact with the second electrode.
[0010] Another aspect is an electronic component guide break the breakable part of the present invention to eliminate the electron so
Electrical contact elements and a method of minimizing the breaking arc portion and the contact portion between the discharge, comprising the steps of: provide
And disposed in the housing for housing the electronic components on one side of the first spring contact and the second spring contact pairs;
In the housing, there is provided a pair of offset on opposite sides of said column of electronic components, which are provided between the third contact to
And prior to rupture by the first spring contact and the second and the third spring contact spring elastically supporting the contact
Supporting the electronic components. Once the electronic device is broken, the method further comprising the electronic component and the force
One pair of the contact column offset; make and break away from the third contact portion of the dispersion。 In this embodiment, the disclosure can be applied
Such as by the U.S. Massachusetts, Attleboro of SensataTechnologies, Inc. Those in device manufacturing.
Brief Description
[0011] The drawings will be described in the following disclosure of specific embodiments illustrated and become apparent, all belonging to the different
The same reference numerals in Fig denote the same parts. BRIEF necessarily to scale, emphasis instead being placed upon illustrating the principles disclosed herein.
[0012] Figure 1 is a schematic diagram of an embodiment of the present invention, a PTC thermistor device.
[0013] Figure 2 is a schematic view showing a PTC thermistor device of Figure 1 after the PTC thermistor fault.
[0014] Figure 3 is a diagram showing an embodiment of a device according to the present invention similar to Figure 1 of the PTC thermistor device
FIG.
[0015] Figure 4 is a similar view of another device according to the present invention, an embodiment of the PTC thermistor device
FIG.
[0016] Figure 5 is a schematic view of the PTC thermistor device shown in Fig 4 after the PTC thermistor fault.
[0017] Figure 6 is a perspective view of an alternative embodiment of the present invention, a PTC thermistor device in accordance with the remaining shows
Partial separation of the housing cover to visually reveal the internal structure of the device.
[0018] Figure 7 is a top view of a PTC thermistor device 6 is a cross-sectional view.
[0019] Figure 8 is a diagram showing a top view of a PTC thermistor is fitted in the device 6 in the lower housing part transverse Several
Cross-sectional view.
Embodiment
[0020] In this embodiment of the present invention disclosed provides improved PTC thermistor device, means for minimizing the
Arcing and overheating when impaired. Embodiment comprises a support, contacts and offset column is configured for the auxiliary thermistor fault
"Bead" fracture, the broken fragments of beads and dispersed away from the separation chamber in conductive contact to minimize arcing and
Overheating.
[0021] Referring now to Figure 1, an exemplary electronic device 100 includes a thermistor element 110 (also referred to as beads 110), with
A first electrode 112 and second electrode 114 located on the opposite side of the electronic component 110. Relative electronic component includes a connector
The side wall portion and the side surface of the sidewall portion 110 defines the outer periphery of electronic components 113. Generally, as known in the prior art
, The bead 110 is a positive temperature coefficient (PTC) ceramic disc member.
[0022] PTC thermistor device 100 further includes a first elastic support 102a, which includes a first electrode 112 in contact with the
The first contact portion 104a, and a second elastic support 102b, which includes a second contact portion 104b, and the second contact portion
On the opposite side of the bead in the center of the first contact portion 104a at a position different from the first electrode contact 112. PTC thermal
Device 100 further includes a thermistor is provided to the contact portion 104a as compared with the first and second contact portion 104b closer to the bead
Third support center 110 108. Contacting a third support 108 includes a third electrode 114 in contact with the second portion 109,
And a bead provided on the same side of the third support 110, 108 and a pair of offset columns 106a and 106b (collectively referred to as an offset
Column 106). Column 106 are each offset each having a tip 107a and 107b, 107a and 107b and each of the first edge
A contact portion 104a and the second contact portion 104b closer to the beads compared to the vertical centroid and by the beads 110 on the shaft
116. Preferably, column 106 is offset relative to each side of the plane including the axis 116 (i.e., the side opposite the contact portion 109)
On, and each of the first and second contact portions 104a and 104b are centroid points across the bead 110 and 115 are arranged relative ratio
Should be offset columns 106a and 106b centroid point 115 farther from the bead 110。 Shape of the end portion of the buttress 106 includes but is not
Limited to a rectangular cross section, a circular cross section and an inclined profile.
[0023] In a preferred embodiment, the outer periphery of the column offset 113 106 108 closer to the support than the third bead 110。 The knot
Configuration, the offset of the column 106 to provide additional leverage to assist the bead 110 when the fault rupture.
[0024] In normal operation, when the thermistor device 100, the bead 110 is mechanically supported at two opposite conductive terminal
(In Figure 1 not shown). A connecting terminal 102a to the first and second elastic support elastically supporting 102b (collectively
The elastic support 102), and the other terminal connected to the third support 108, which in one embodiment is a rigid support.
[0025] In a preferred embodiment, the offset 106 is not in contact with the bead column 110 in its normal operation. In this embodiment, the partial
Moving the bead 110 posts 106 are spaced apart and electrically insulated from the second electrode portion 109 and the third contact 114. Through the offset column
Distance between the second electrode 114 is often less than 2 mm, and preferably between 0.5 mm and almost zero. Since the normal operation
In the absence of close contact, the column can be used to offset a cheaper material, because the column is not exposed to the offset
Under the assumption that they are directly in contact with the second electrode 114 (to be exposed) temperature. Further, such materials are usually
Ease of molding, and is not brittle.
[0026] In normal operating state, the first and second elastic support 102 and the corresponding first and second contact portions 104a
And 104b (collectively referred to as contact portions 104) of the electronic components are applied to the first force and the second force, the third support 108 by the
The third force is applied and the third contact portion 109 of confrontation。 The third force is generally greater than the first force and the second force. Therefore, in the Pearl 110
When impaired, generally located in the center of the force by the third bead 110 108 imposed increased support through the shaft 116 along the bead 110
The possibility of breaking the plane.
[0027] Referring now to Figure 2, once the fracture beads 110, 104a includes a first contact portion 102a of the first resilient supporting
And includes a second contact portion 104b of the second elastic support columns 106a 102b and 106b are offset toward the driven bead 110 '
Fragments, and separating the dispersion of fragments of a second lead electrode 114 and the third contact portion 109 and the bead 110 'of the other fragment.
Figure 3 shows a PTC thermistor device, similar to Figure 100, the thermistor device 100 '。 In this, the third support 118
Resilient contact with the contact portion 120.
[0028] Referring now to Figure 4, similar to Figure 3, the thermal resistance of the device 100 'of the other thermistor device 100' includes
A conductive support member 135 independent of the third support 128, third support 128 is connected via the fusible 134 (e.g., solder) with
Received a separate conductive element 135。 Thermistor device 100 'includes alignment posts 132a and 132b, a third contact portion which surrounds
Contact portion 109。 Thermistor device 100 "also includes a support 128 coupled to the third and the alignment posts 132a and 132b (collectively
Called alignment posts 132), one or more springs 130a and back 130b. In one embodiment, the alignment post 132 is formed
Alignment post 138 between the cavity 132 and is positioned around the upper portion of the third contact portion 109 of the third support, thereby beads
Further the third insulating support 128 (also referred to as spring contacts) 110 failure. The optional insulating member 136 (Figure 4
Shown) may be disposed in the vicinity of the fusible connection 134, to ensure that the third support member 135 and the support since the fusible conductive
Separately melting of connection 134 to further reduce the possibility that the relative electrical contact between the terminals. Fusible connection 134 is set
Counted as working as long as the bead 110 as it was designed refrigerator compressor, then the 134 will not fusible connection by the
The maximum ambient temperature and continuous operation of said electric current generated by the refrigerator compressor under melting.
[0029] As shown, once the beads 110 failure, the bead 110 of the heat dissipation produced thermal overheating or fragmentation and 5
/ Or excessive current is guided by a single spring contact (135,128 and 109), whereby the melted fusible shells from a single connection 134 and
Spring contacts 128 to eliminate support. Then back to the spring 130a 130b spring contact 128 and forcing a single contact and section 109
Away from the second electrode 114. The spring contact 128 is pulled into the cavity 138, reducing the possibility of electrical contact between the opposing terminals.
When the spring contact and the conductive support member 134 due to the melting of the fusible connection separated, these optional insulating member 136
Separate the two parts, and further reduces the possibility of the relative electrical contact between the terminals.
[0030] More specifically, Figure 6 shows another thermistor device 600, which includes a bead 110 similar to Figure 110 beads.
Device 600 includes an upper housing 601 and lower housing 603 which partially surrounds the elastic electrically coupled to the first 602a and second support
The first end 602b of the elastic support 605 is connected, a first resilient supporting contact with the first electrode 602a comprises a first contact 112
Contact portion 604a; 602b and a second elastic support comprises a first contact portion 604a and a position different from the first electrical
The second contact portion 604b of the contact electrode 112. Device 600 also includes a first terminal disposed in different bead 110 605
The second end 607 of the connector on the side of the second connector terminal 607 is electrically coupled to the third support 608, third support 608 has
The third contact portion 609 in contact with the second electrode 114, and a third contact portion 609 and the first contact portion 604a
Compared to the second contact portion 604b is disposed closer to the center of beads 110.
[0031] In one embodiment, the first contact portions 604a, 604b of the second contact portion 609 and a third contact portion
Each of the separate may include a plurality of fingers 617, such as shown in Figure 6 the three fingers. In one embodiment
Embodiment, the housing 603 is connected to one pair of offset columns 606a and 606b (collectively referred to as the offset column 606) spaced from the bead 110,
And the bead 110 and the first contact portion 604a, a second contact portion 604b and a third contact portion 609 electrically insulated.
[0032] The offset column 606 located on the side of the second electrode 114, each of which has a tip (8 in more detail in FIG.
Shown), is arranged offset from the third column support 608 closer to the outer periphery of the electronic component 113 and the support 608 in the third
On each side. Column 606 is disposed offset to make a bead breaking 110 'dispersed broken part, so to break beads 110'
The electrical contact is eliminated, and the broken part and the arc 604 and the contact portion 609 between the discharge is minimized.
[0033] In Figure 7 a cross-sectional view of the top of the device 600, showing the various components are arranged relative to the shaft 616, the shaft
A third support shaft 616 is aligned along and substantially perpendicular to the bead 110. In one embodiment, the first and second resilient support
602 is a cantilever spring. The first and second elastic support 602 and the corresponding first and second contact portions 604 of each bead 110
Applying a first force and the second force (represented by arrow 644), which is applied by the third support 608 and the third contact portion 609 and
The third force confrontation。 The third force is generally greater than the first force, and the third force is greater than the second force. This configuration improves the fault
Broken scattered beads 110 '.
[0034] After assembly, the third support is mounted and electrically connected to the second end of the connector 607, which is substantially parallel to the bead 110,
And substantially perpendicular to the axis of the bead 110 along the third force point。 The first force and the second force with a direction substantially perpendicular to the bead 110
The component of the force, and the use of cantilever spring-like embodiment, the force component is an outer point of the electronic component
Weeks. In one embodiment, the elastic support 602 is welded to the first end of the connector 605, and a third support 608 is welded
To the second end of the connector 607. In an alternative embodiment, the first elastic support 602a, 602b and the second resilient supporting the first end
Each connector 605 can be integrated in a one-side member。 Similarly, the third 608 and a second end connected to the support
607 can be integrated on one side member.
[0035] More specifically, as shown in the figure, device 600 also includes an electronic component separation column 606 of offset 8, and
The buttress 606 and 110 and the first, second, and third contact portion 602a of electronic components, 602b and 608 electrically isolated
Edge。 Offset column 606 at one side of the second electrode 114, each of which has an inclined edge 835 in cross section。 In one
Embodiment, the offset of the third support column 608 than near the outer periphery 110 of the bead 113, a cross-sectional inclination angle of the bead 110 of the left
Heart; tip and the first and second contact portions 602a and the bead contacts the inclined portion 602b closer than the axis 116.
Column offsets are preferably insulated and spaced bead portions 110 and 608, and the second electrode 114 and the third contact. These features
The position and shape of the beads 10 improve the fault when the beads dispersed into the debris compartment 842,844,846 and 848.
[0036] A pair of contact alignment posts 832a and 832b are disposed adjacent to the third support shaft 608 and is located opposite 116
Upper side. In one embodiment, the offset column 606 and the corresponding contact alignment posts 832a and 832b are formed located between the
Compartment 846, and the collection and insulated from the contact portions 609 and 604 of the electronic components of the fracture fragments。 The pair of contact
Alignment posts 832a and 832b (collectively, the alignment posts 832) during manufacture and operation of the third support in favor of the third contact 608 and
Alignment portion 609, the protection and orientation. In one embodiment, the third support 608 is elastically supported and implemented in alternative
Embodiment, the third support 608, and a third contact portion 609 is integrated in a rigid support, e.g., having a contact portion terminates
One end of a single conductive member, the bead 110 is not damaged under normal operating conditions, but once the beads 110 are secondary failure
Help make bead 110 break. In another embodiment, the third support 608, and a third contact portion 609 is implemented as a conductive base.
In yet another embodiment, the integrated motor protector (not shown) is included in the external device 100 electrically connected to the thermistor
Shell.
[0037] 110 break before the beads, the contact 602 supported by an elastic, resilient contact 602 110 forcing the bead against a third support
608, as described above, the third support may be elastically supported on a rigid support。 Once the bead 110 failures, broken bead 110 '
The offset of forced contact with the column 606, a result, the bead breaking 110 'away from the first portion of the fracture, the second and third contact
Dispersed. In some failure modes, around the outer edge of the broken part of the offset column (e.g. tilting tip) rotated and stars
Scattered to compartments 842, 844 and 848.
[0038] Although the present invention has been made regarding certain preferred embodiments of the present invention is described, for ordinary skill in the art
Members for various variations and modifications are obvious. Thus, relative to the prior art aims to explain the appended claims
As wide as possible to include these changes and modifications。


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