CN1389888A - Overload protection device, electric compressor and refrigerating air-conditioner apparatus - Google Patents
Overload protection device, electric compressor and refrigerating air-conditioner apparatus Download PDFInfo
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- CN1389888A CN1389888A CN 02122170 CN02122170A CN1389888A CN 1389888 A CN1389888 A CN 1389888A CN 02122170 CN02122170 CN 02122170 CN 02122170 A CN02122170 A CN 02122170A CN 1389888 A CN1389888 A CN 1389888A
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- overload protection
- protection arrangement
- thermoinduction
- current
- fusing device
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- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
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Abstract
The existing porblems of prior overload protecting device are as follows: the metal of the fusion device melts or evaporate by electric energy or others, then diffuses into the container, and the generation of an arc leads to large-scale current in the motor of compressor,thereby the compressor may be burned-out and damaged. This is the overload-protecting device provide with the first heat-reacting device 9 for overload current protection to make a movable contact point 9b move by deformation due to the temperature of the heat-reacting plate 9c and to have a fixed contact point 9f paired with its movable contact point 9b, with the current fuse means 10 to carry out interruption of the current by fusing due to its self-oxoterm by the current, and with a housing container 7 to wire-connect and to house the heat-reacting device 9 and the current fuse means 10 in a series circuit, and this is made to be constituted, so that a shielding member 12 is installed to separate a space at which the current fuse means 10 is installed from a space at which the first heat-reacting device 9 is installed.
Description
Technical field
The present invention relates to overload protection arrangement, motor compressor and refrigerating air-conditioning, particularly about the overload protection arrangement that uses the thermoinduction movable body, motor compressor and the refrigerating air-conditioning that uses this overload protection arrangement.
Background technology
Figure 26 is the skiagraph of the overload protection arrangement in the past that discloses of Japanese kokai publication sho 64-2232 communique for example.Figure 27 is that the VI-VI of Figure 26 looks sectional drawing.As shown in the figure; in the overload protection arrangement in the past; in the space of the storage container 7 that container 7a that is made by heat-resistant insulation materials such as synthetic resin and lid 7b surround; be fixed in the axle 9a on the bottom surface 7c of storage container 7 by perforation; the earth's axis of can freely reversing is supported with plate-like thermoinduction maneuvering board 9c; on this thermoinduction maneuvering board 9c, be fixed with travelling contact 9b; simultaneously, there is the fixed terminal 9e of fixed contact 9f to connect on the bottom surface 7c that is fixed in the storage container 7 in fixed-site with above-mentioned travelling contact 9b antagonism.In addition, on any bottom surface 7c between the above-mentioned two ends fixed terminal 9e, connect and be fixed with heating terminal 13a, heater wire 13 waits by welding and is connected between this heating terminal 13a and the said fixing terminal 9e, is configured in bottom surface 7c one side of storage container 7, and thermoinduction maneuvering board 9c is heated.The part of this heater wire 13 is provided with as the little thin thread part 13b of the cross-sectional area of device for fusing.Figure 28 shows the example of thin thread part 13b.
In addition, Figure 29 is the 2nd skiagraph of the overload protection arrangement of example in the past.Figure 30 is that the VII-VII of Figure 29 is to looking sectional drawing.As shown in the figure, replace having the heater 13 of thin thread part 13b, temperature fuse 14 is set, constitute above-mentioned device for fusing.
The overload protection arrangement of Gou Chenging generally uses as the overload protection arrangement of idle call, freezing motor compressor like this.In addition; this overload protection arrangement also has the situation of using on the surface that is installed to sealed electrical compressor body 1 shown in Figure 2 (overload protection arrangement is represented with 30); the size of common overload protection arrangement is the size of storage container 7; its diameter is below the 30mm, highly is the following degree of 20mm.
In addition; in the motor compressor of single phase poaer supply; as shown in Figure 3, overload protection arrangement (overload protection arrangement is represented with 30) is connected in series in the shunt circuit of the main coil 1a of the motor 1c that is connected in series with starting device 8 and ancillary coil 1b and is used on the motor coil.
In the motor compressor of three phase mains, as shown in Figure 4, two overload protection arrangements (overload protection arrangement is represented with 30) correspondingly are arranged on U phase, W respectively equate to be used on the two-phase part.
In the refrigerating air-conditioning of air conditioner that uses this overload protection arrangement and refrigerator, the air-condition freezing load is along with variations such as environment temperature, humidity.Therefore, be installed on the motor compressor on air conditioner, the refrigerator, producing compressive load change or starting stops etc., this is severe for sliding parts such as bearings, will produce motion state continually, this motion state is to use the distinctive phenomenon of being can't see in other goods of motor 1c of motor compressor.
In addition, because motor compressor is to turn round under the condition of above-mentioned sternness, therefore, has the situation that motor compressor produces unusually, motor 1c can not rotate, locked rotor current continues energising and take place.Thereby, the scaling loss of the motor 1c that is used to prevent that this locked rotor current from causing is installed on motor compressor or prevents the overload protection arrangement of motor compressor overload running.
As the compressed format of this motor compressor reciprocating type, rotary, vortex, swing type, helical blade type etc. are arranged, above-mentioned overload protection arrangement can be provided with for the compressor of any form.
Then, action is described.When the device of air conditioner that is equipped with compressor and refrigerator take place any unusual, become when turning round under the big state in that compressor load is unusual, if there is big electric current to flow through compressor, the self-heating of thermoinduction maneuvering board 9c will increase, reach the moment of operating temperature at thermoinduction maneuvering board 9c, thermoinduction maneuvering board 9c return motion tempestuously itself, make travelling contact 9b leave fixed contact 9f, cut off energising to air compressor motor 1c.
After cutting off electric current, self athermic thermoinduction maneuvering board 9c begins to cool down, in the moment that reaches the inversion recovery temperature, thermoinduction maneuvering board 9c carries out the counter-rotating action opposite with above-mentioned action, return to original position, travelling contact 9b is contacted with fixed contact 9f, give air compressor motor 1c energising once more.After above-mentioned thermoinduction maneuvering board 9c recovered, if above-mentioned unusual normalization, compressor will run well, and had normal current to flow through air compressor motor, and thermoinduction maneuvering board 9c does not carry out return motion repeatedly.
But; after above-mentioned thermoinduction maneuvering board 9c recovers, do not have unusually under normalization, the unusual situation about continuing above-mentioned, thermoinduction maneuvering board 9c moves repeatedly and recovers; finally make thermoinduction maneuvering board 9c suffer fatigue rupture, cause travelling contact 9b and each fixed contact 9f deposited.The deposited meeting of this contact makes air compressor motor 1c continue to be in the state of big electric current energising, motor winding continues heating, cause coil covered part or insulating material etc. to be destroyed, therefore, part coil does not have covered part each other and is in contact condition, increase the conductor area, reduced coil resistance, further caused electric current to increase.
In above-mentioned overload protection arrangement; because the thin thread part or the temperature fuse 14 of the heater 13 that the device for fusing that is equipped with conduct to cut off the final means of electric current constitutes; thereby; under the situation of above-mentioned big electric current energising; when current value that reaches setting or temperature; electric current is cut off in the thin thread part 13b of the heater 13 that device for fusing constitutes or temperature fuse 14 fusing, and damage that compressor is suffered or the suffered damage of overload protection arrangement itself are suppressed to Min..
Summary of the invention
In above-mentioned conventional art, the structure that constitutes by thin thread part 13b about above-mentioned device for fusing, when the thin thread part 13b of device for fusing fusing, by means of the electric energy of being given, the melt metal vaporize, and moment be diffused in the storage container 7 of overload protection arrangement.Under the identical situation of the cut-out current value of fuse, the generation quantitative change of this metal vapor amount is many, how to the big degree of energy quantitative change that makes on the thin thread part 13b that is applied to the current fusing device, the degree that promptly allows voltage raise.
In addition, when the metallic vapour concentration in the storage container 7 became big, it is very little that the resistance in the metallic vapour becomes, thereby, electric current by metallic vapour towards the low side flow of potential difference.That is, near the potential difference that waits between the end of the thin thread part 13b of current fusing device or the end of the thin thread part 13b of current fusing device and the travelling contact 9b becomes big, produces electric arc between the part of distance weak point.Usually, in air or non-active gas, in the time of producing electric arc in the distance of this degree, need the high voltage of tens thousand of～hundreds thousand of volts, but under the big situation of metallic vapour concentration, promptly fly out with the degree electric arc of hundreds of volts.
In addition, when under the voltage of the 100V level of domestic power supply in Japan etc., using compressor, owing to the energy on the thin thread part 13b that is applied to above-mentioned current fusing device is smaller, therefore, the metal vapor amount that the thin thread part 13b of above-mentioned current fusing device is produced when fusing is little, metallic vapour density in the storage container 7 is also little, moreover, because simple potential difference is little, even produce electric arc, the energy of electric arc itself is also smaller, therefore, make the energy of the further vaporize of metal little, if the distance between the electric arc arrives certain degree greatly, electric arc just is easy to disappear.Be that the possibility of cutting off electric current by means of the thin thread part 13b of current fusing device is very big.
But, when under high commercial 200V power supply of voltage or overseas 240V power supply, using compressor in Japan, because the energy that applies is big, therefore, the metal vapor amount that the thin thread part 13b of current fusing device is produced when fusing is also big, and it is big that the metallic vapour concentration in the storage container 7 become, moreover, because simple potential difference is big, is easy to produce electric arc.Further, the energy of electric arc itself is also bigger, therefore, the metallic vapourization of part takes place in electric arc, supplies with metallic vapour, and electric arc is to distance is short, metallic vapour density is high part, be that the part that resistance is little, potential difference is big shifts, this action simultaneously takes place at long time remaining.
Thereby, when the energising of big electric current continues the long time, can cause burning of large-scale motor winding, make compressor produce big damage, might burn overload protection arrangement thermoinduction maneuvering board 9c around.
The generation of the electric arc that the influence of this metallic vapour causes, the size of overload protection arrangement are main cause for a short time.Even work hard on current fusing Unit Installation position, the distance of current fusing device and bimetallic thermoinduction maneuvering board 9c also has only below the 5mm degree; In addition, because the spatial volume in the storage container 7 is little, it is big that metallic vapour density can become; The two is to facilitate the incident condition of electric arc.In general, the size of overload protection arrangement is very difficult for the cut-out of reliably carrying out electric current under the voltage of 200V level.
In addition; in order to prevent the generation of current fusing device when fusing electric arc; also adopt the method that overload protection arrangement and current fusing device are separated; but; in this case, can cause the expansion of installing space, bring the high problem of expense height, installation cost of current fusing device; therefore, wish the current fusing device is arranged in the overload protection arrangement integratedly.
In above-mentioned prior art; temperature fuse 14 constitutes the structure of device for fusing, because original temperature fuse 14 is very exquisite parts, a little less than the temperature fuse vibration; be set directly at when using on the compressor at overload protection arrangement, the vibration in the compressor operation may cause misoperation.Usually; the use of above-mentioned overload protection arrangement during identical with the compressor life-span do not need repairing; but the vibration of above-mentioned compressor or startup, the thermal shock meeting that stops to cause make temperature fuse 14 aging in advance, cause the possibility of misoperation to uprise.
In addition, when temperature fuse fixed on fixed contact 9f and the fuse terminal by welding or refined lead solid welding, temperature fuse had the danger of fusing.In order to prevent that this phenomenon from taking place, must after the temperature fuse cooling, weld or the refined lead weldering, therefore, the manufacturing of overload protection arrangement is very difficult.
Moreover the administrative expenses the when cooling of temperature fuse makes and makes during owing to above-mentioned welding or refined lead weldering increase, the expense of temperature fuse itself increases, thereby the expense of overload protection arrangement uprises.
The present invention proposes in order to address the above problem; its objective is provides a kind of reliability height, overload protection arrangement that cost is low; in thermoinduction maneuvering board 9c fatigue rupture, when the generation contact is deposited; the generation of electric arc in the time of suppressing fuse blows all the time; carry out the cut-out of electric current reliably, prevent the large-scale damage of the compressor that the extensive scaling loss of air compressor motor causes or the scaling loss of overload protection arrangement itself fully.
The overload protection arrangement of technical scheme 1 of the present invention comprises: its thermoinduction maneuvering board is heated produce paratonic movement, counter-rotating, its a pair of travelling contact and corresponding a pair of fixed contact are in the first thermoinduction telecontrol equipment of contact, contactless state; The current fusing device that is connected in series with the first thermoinduction telecontrol equipment; Be used to hold the storage container of the first thermoinduction telecontrol equipment and current fusing device; Be connected with the first thermoinduction telecontrol equipment and current fusing device, connect storage container and reach outside splicing ear, in storage container, be provided with the device that prevents the electric arc generation that constitutes by shield member.
The overload protection arrangement of technical scheme 2 is in the overload protection arrangement of technical scheme 1, prevents that the device that electric arc produces from covering the space that is provided with the current fusing device by shield member.
The overload protection arrangement of technical scheme 3 is in the overload protection arrangement of technical scheme 1, prevent device that electric arc produces be the current fusing device between the parts of this each splicing ear of fusing portion to storage container, be arranged on the shield member between the parts in the storage container.
The overload protection arrangement of technical scheme 4 is that having heaters is connected in series in the series loop of the first thermoinduction telecontrol equipment and current fusing device in each overload protection arrangement of technical scheme 1～3.
The overload protection arrangement of technical scheme 5 is in each overload protection arrangement of technical scheme 1～4, is connected in series with the second thermoinduction telecontrol equipment in the series loop of the first thermoinduction telecontrol equipment and current fusing device.
The overload protection arrangement of technical scheme 6 is in the overload protection arrangement of technical scheme 4, and heater forms thin thread part, constitutes the current fusing device.
The overload protection arrangement of technical scheme 7 is that shield member is made of the material with extinguishing arc effect in each overload protection arrangement of technical scheme 1～6.
The overload protection arrangement of technical scheme 8 is that shield member is made of nonflammable resin or heat-resistant resin in each overload protection arrangement of technical scheme 1～6.
The motor compressor of technical scheme 9 is that technical scheme 1～8 each overload protection arrangement of putting down in writing is arranged on the outer wall of closed container of motor compressor.
The motor compressor of technical scheme 10 is that storage container is formed by pressure vessel, overload protection arrangement is arranged in the closed container of motor compressor in technical scheme 1～8 each overload protection arrangement of putting down in writing.
The refrigerating air-conditioning of technical scheme 11 has the motor compressor of technical scheme 9 or technical scheme 10.
The refrigerating air-conditioning of technical scheme 12 is that technical scheme 1～8 each overload protection arrangement of putting down in writing is arranged in the unit controls loop.
The overload protection arrangement of technical scheme 1 of the present invention comprises: the first thermoinduction telecontrol equipment, its thermoinduction maneuvering board are heated and produce paratonic movement, counter-rotating, and its a pair of travelling contact is in contact, contactless state with corresponding a pair of fixed contact; The current fusing device that is connected in series with the first thermoinduction telecontrol equipment; Be used to hold the storage container of the first thermoinduction telecontrol equipment and current fusing device; Be connected with the first thermoinduction telecontrol equipment and current fusing device; connect above-mentioned storage container and reach outside splicing ear; in this overload protection arrangement; in storage container, be provided with the device that prevents the electric arc generation that constitutes by shield member; therefore; when thermoinduction maneuvering board generation fatigue rupture; when contact is deposited; do not rely on voltage to the compressor supply power; the generation of electric arc in the time of suppressing the fusing of current fusing device all the time; can reliably carry out failure of current; prevent the big damage of the compressor that the extensive scaling loss of air compressor motor causes or the scaling loss of overload protection arrangement itself fully, improved fail safe.
The overload protection arrangement of technical scheme 2 is in the overload protection arrangement of technical scheme 1; cover the space that is provided with the current fusing device by shield member owing to prevent the device that electric arc produces; therefore; even the fusing of current fusing device, motlten metal vaporize, metallic vapour also can not be diffused into the outside of shield member; therefore; can prevent the generation of the electric arc that shield member is outer, extinguishing arc is carried out the cut-out of electric current reliably rapidly.
The overload protection arrangement of technical scheme 3 is in the overload protection arrangement of technical scheme 1; owing to prevent that the device that electric arc produces from being between the parts of this each terminal of fusing portion to storage container at the current fusing device; be arranged on the shield member between the parts in the storage container; therefore; the fusing of current fusing device; the melt metal vaporize; metallic vapour is diffused in the storage container of overload protection arrangement; in addition; because the parts that are connected with fusing portion one end and with parts that the fusing portion other end is connected between have potential difference, so be the factor of generation electric arc between the two in the same old way.But, owing between two parts, be provided with shield member, therefore, even for example between two parts near the time, the actual range between two parts is elongated, has discharged the factor that produces electric arc.As a result, by the fusing of current fusing device, can promptly carry out the cut-out of electric current.
The overload protection arrangement of technical scheme 4 is in each overload protection arrangement of technical scheme 1～3; because heater is connected in series in the series loop of the first thermoinduction telecontrol equipment and current fusing device; therefore; can the thermal response sensitivity of the first thermoinduction telecontrol equipment be improved by heater; promoted the counter-rotating of thermoinduction maneuvering board; can reliably carry out failure of current; the big damage of the compressor that the extensive scaling loss of air compressor motor causes or the scaling loss of overload protection arrangement itself have been prevented fully; improved fail safe, can obtain effect simultaneously applicable to the little compressor of overload current value.
The overload protection arrangement of technical scheme 5 is in each overload protection arrangement of technical scheme 1～4; owing in the series loop of the first thermoinduction telecontrol equipment and current fusing device, be connected in series with the second thermoinduction telecontrol equipment; therefore; can reliably carry out failure of current; the big damage of the compressor that the extensive scaling loss of air compressor motor causes or the scaling loss of overload protection arrangement itself have been prevented fully; improved fail safe; simultaneously can directly detect the compressor surface temperature, obtain further to improve the effect of fail safe.
The overload protection arrangement of technical scheme 6 is in the overload protection arrangement of technical scheme 4; because heater forms thin thread part; constitute the current fusing device; therefore, can make two effects of the failure of current effect of the counter-rotating facilitation effect of thermoinduction maneuvering board of a heating appliances having heaters and current fusing device.Be easy to the miniaturization and the making of overload protection arrangement.
The overload protection arrangement of technical scheme 7 is in each overload protection arrangement of technical scheme 1～6; because shield member is made of the material with extinguishing arc effect, therefore, be difficult to produce misoperation; improve reliability, can obtain overload protection arrangement cheaply.
The overload protection arrangement of technical scheme 8 is in each overload protection arrangement of technical scheme 1～6, because shield member is made of nonflammable resin or heat-resistant resin etc., therefore; formability is good; make simply, and, overload protection arrangement cheaply can be obtained.
The motor compressor of technical scheme 9 is on the outer wall of the closed container that is arranged on motor compressor of each the overload protection arrangement with technical scheme 1～8; therefore; can protect the motor of motor compressor to avoid the damage that causes when big electric current flows through, improve the reliability of motor compressor.
The motor compressor of technical scheme 10 is in each overload protection arrangement of technical scheme 1～8; storage container is formed by pressure vessel; above-mentioned overload protection arrangement is arranged in the closed container of motor compressor; therefore; can protect the motor of motor compressor to avoid the damage that causes when big electric current flows through, improve the reliability of motor compressor.
The refrigerating air-conditioning of technical scheme 11 is the motor compressors that have technical scheme 9 or technical scheme 10, and therefore, the compressor that dependability is high has obtained the high refrigerating air-conditioning of reliability.
The refrigerating air-conditioning of technical scheme 12 is that each the overload protection arrangement with technical scheme 1～8 is arranged in the unit controls loop, therefore, has improved the reliability of motor compressor, can obtain the high refrigerating air-conditioning of reliability.
Description of drawings
Fig. 1 be the expression embodiment of the present invention 1 the control loop that overload protection arrangement is connected to the refrigerating air-conditioning unit on skeleton diagram.
Fig. 2 be expression embodiment of the present invention 1 overload protection arrangement is installed to skeleton diagram on the motor compressor outer surface.
Fig. 3 is the single phase poaer supply circuit diagram that expression is assembled with the overload protection arrangement of embodiment of the present invention 1.
Fig. 4 is the three phase mains circuit diagram that expression is assembled with the overload protection arrangement of embodiment of the present invention 1.
Fig. 5 is the skiagraph of the overload protection arrangement of expression embodiment of the present invention 1.
Fig. 6 is that the I-I of Fig. 5 of overload protection arrangement of expression embodiment of the present invention 1 is to looking sectional drawing.
Fig. 7 is that the II-II of Fig. 5 of overload protection arrangement of expression embodiment of the present invention 1 is to looking sectional drawing.
Fig. 8 is the skiagraph of the overload protection arrangement of expression embodiment of the present invention 2.
Fig. 9 is that the III-III of Fig. 8 of overload protection arrangement of expression embodiment of the present invention 2 is to looking sectional drawing.
Figure 10 is that the IV-IV of Fig. 8 of overload protection arrangement of expression embodiment of the present invention 2 is to looking sectional drawing.
Figure 11 be expression embodiment of the present invention 3 overload protection arrangement is installed to skeleton diagram on the motor winding in the motor compressor.
Figure 12 is the skeleton diagram of the closed container inner crest face that overload protection arrangement is installed to motor compressor of expression embodiment of the present invention 3.
Figure 13 is the end view of the overload protection arrangement of expression embodiment of the present invention 3.
Figure 14 is the plane graph of the overload protection arrangement of expression embodiment of the present invention 3.
Figure 15 is the skiagraph of the overload protection arrangement of expression embodiment of the present invention 3.
Figure 16 is that the V-V of Figure 15 of overload protection arrangement of expression embodiment of the present invention 3 is to looking sectional drawing.
Figure 17 is the skiagraph of the overload protection arrangement of expression embodiment of the present invention 4.
Figure 18 is that the I-I of Figure 17 of overload protection arrangement of expression embodiment of the present invention 4 is to looking sectional drawing.
Figure 19 is that the II-II of Figure 17 of overload protection arrangement of expression embodiment of the present invention 4 is to looking sectional drawing.
Figure 20 is that the III-III of Figure 17 of overload protection arrangement of expression embodiment of the present invention 4 is to looking sectional drawing.
Figure 21 is the skiagraph of the state of current fusing device after the fusing of fusing portion that is used to illustrate the overload protection arrangement of embodiment of the present invention 4.
Figure 22 is used to illustrate that the IV-IV of Figure 21 of the state of current fusing device after the fusing of fusing portion of overload protection arrangement of embodiment of the present invention 4 is to looking sectional drawing.
Figure 23 is the skiagraph of the overload protection arrangement of expression embodiment of the present invention 5.
Figure 24 is that the V-V of Figure 23 of overload protection arrangement of expression embodiment of the present invention 5 is to looking sectional drawing.
Figure 25 is that the VI-VI of Figure 23 of overload protection arrangement of expression embodiment of the present invention 5 is to looking sectional drawing.
Figure 26 represents the skiagraph of overload protection arrangement in the past.
Figure 27 represents that the VI-VI of Figure 26 of overload protection arrangement in the past is to looking sectional drawing.
Figure 28 represents the schematic diagram of the thin thread part of overload protection arrangement in the past.
Figure 29 represents the skiagraph of another overload protection arrangement in the past.
Figure 30 represents that the VII-VII of Figure 29 of overload protection arrangement in the past is to looking sectional drawing.
Symbol description
The 1st, motor, 1d are closed containers, the 5th, and unit controls loop, the 7th, storage container; 7e is a pressure vessel, and 9 is first thermoinduction telecontrol equipments, and 9b is a travelling contact, and 9c is the thermoinduction maneuvering board; 9e is a splicing ear, and 9f is a fixed contact, the 10th, and the current fusing device; 10b is a splicing ear, the 12nd, and shield member, the 13rd, heater; 13b is a thin thread part, and 15 is second thermoinduction telecontrol equipments, the 16th, and shield member; the 17th, shield member, the 20th, splicing ear, the 30th, overload protection arrangement.
Embodiment
Below, the overload protection arrangement of the embodiment of the present invention 1 of key diagram 1～shown in Figure 7.To be expression be connected to skeleton diagram on the control loop of refrigerating air-conditioning unit with overload protection arrangement to Fig. 1; Fig. 2 is that expression is installed to skeleton diagram on the motor compressor outer surface with overload protection arrangement; Fig. 3 is the single phase poaer supply circuit diagram that is assembled with overload protection arrangement; Fig. 4 is the three phase mains circuit diagram that is assembled with overload protection arrangement; Fig. 5 is the skiagraph of overload protection arrangement; Fig. 6 be from the I-I section of beneath Fig. 5 to view, Fig. 7 observe from the top Fig. 5 the II-II section to view.
In these figure, the 1st, sealed electrical compressor is built-in with the motor 1c that main coil 1a and ancillary coil 1b form.The 2nd, the low-pressure side muffler, the 3rd, the high-pressure side discharge pipe, 4 are mounted in sealed electrical compressor 1 lip-deep glass capsulation terminal, the 5th, the control loop of refrigerating air-conditioning unit, one end is connected on the above-mentioned glass capsulation terminal 4, and the other end is connected on the power supply 6.The 30th, overload protection arrangement; as shown in the figure; be arranged in the above-mentioned air-conditioner refrigerator unit; connect with starting device 8; and constitute by the first thermoinduction telecontrol equipment 9 and current fusing device 10, the first thermoinduction telecontrol equipment 9 constitutes by the thermoinduction maneuvering board 9c that is fixed with a pair of travelling contact 9b and corresponding to a pair of fixed contact 9f of a pair of travelling contact 9b.
In addition, this overload protection arrangement 30 also has situation about using on the surface that is installed on sealed electrical compressor body 1 as shown in Figure 2, and common overload protection arrangement is of a size of, and the size of container is that diameter 30 is following for mm, height 20 is the following degree of mm.
As Fig. 5, Figure 6 and Figure 7, the 7th, storage container is made of container 7a and lid 7b, makes by the heat-resistant insulation material of synthetic resin etc.The 9th, by can freely the reverse first thermoinduction telecontrol equipment of earth's axis support fixation of the central fixed axis 9a in this storage container, be made of plate-like thermoinduction maneuvering board 9c with a pair of travelling contact 9b and the fixed contact 9f that is fixed on the fixed terminal 9e that is provided with corresponding to above-mentioned travelling contact 9b, fixed terminal 9e connects the optional position of the bottom surface 7c that is installed on said vesse 7a.
Above-mentioned current fusing device 10 is configured in the inside of above-mentioned lid 7b, the end of portion of terminal 10a that is arranged on the two ends of current fusing device 10 extends from the inside of above-mentioned lid 7b, and be connected on the fuse terminal 10b of the optional position that connects the bottom surface 7c that is installed on container 7a with the series loop wiring by connecting distribution 11, simultaneously, the 10a of another terminal portion is connected on the said fixing terminal 9e that connects the optional position that is installed on the bottom surface 7c in the said vesse 7a by connecting distribution 11, the shield member that 12 materials by having the extinguishing arc effect that are arranged on lid 2 the insides are formed, the above-mentioned first thermoinduction telecontrol equipment 9 is separated with above-mentioned current fusing device 10, and be covered with above-mentioned current fusing device 10.
In the present embodiment, shield member 12 is the devices that prevent that electric arc from producing.
In addition, the formation of overload protection arrangement 30 is, with the first thermoinduction telecontrol equipment 9 that is connected in series and current fusing device 10 in shield member 12 is contained in storage container 7.
Fixed terminal 9e and fuse terminal 10b that perforation is installed on the bottom surface 7c of said vesse 7a are splicing ears.
The overload protection arrangement 30 of Gou Chenging under the situation of single phase poaer supply, as shown in Figure 3, is connected in series thermoinduction maneuvering board 9c, current fusing device 10 and air compressor motor 1c like this.Therefore, overload protection arrangement 30 is connected in series in the shunt circuit of the main coil 1a of the air compressor motor 1c that is connected in series with starting device 8 and ancillary coil 1b, is on motor winding 1a or the 1b.
In addition, in the motor compressor of three phase mains, as shown in Figure 4, equate with respect to each respective coil two overload protection arrangements to be set with being connected in series and to be used on the two-phase part at U phase, W.
Moreover as shown in Figures 1 and 2, this overload protection arrangement 30 is to be installed to control machines in the control loop 5 of the surface of closed container 1d of air compressor motor or air-conditioner refrigerator unit to be provided with on the narrow like that part of part and to use.
Below, action is described.When the refrigerating air-conditioning unit that is equipped with motor compressor 1 take place any unusual, become when turning round under the big state in that compressor load is unusual; Take place under any unusual situation in the compressor instruction unit; At air compressor motor coil 1a, 1b any unusual situation etc. takes place arbitrarily under the situation, if there is big electric current to flow through motor compressor 1, the self-heating of thermoinduction maneuvering board 9c will increase, reach the moment of operating temperature at thermoinduction maneuvering board 9c, thermoinduction maneuvering board 9c return motion tempestuously itself, make travelling contact 9b leave fixed contact 9f, cut off to the coil 1a of air compressor motor, the energising of 1b.
After cutting off electric current, self athermic thermoinduction maneuvering board 9c begins to cool down, in the moment that reaches the inversion recovery temperature, thermoinduction maneuvering board 9c carries out the counter-rotating action opposite with above-mentioned action, return to original position, travelling contact 9b is contacted with fixed contact 9f, give air compressor motor coil 1a, 1b energising once more.
After above-mentioned thermoinduction maneuvering board 9c recovered, if above-mentioned unusual normalization, compressor will run well, and had normal current to flow through air compressor motor coil 1a, 1b, and thermoinduction maneuvering board 9c does not carry out return motion repeatedly.
But; after above-mentioned thermoinduction maneuvering board 9c recovers, do not have unusually under normalization, the unusual situation about continuing above-mentioned, thermoinduction maneuvering board 9c moves repeatedly and recovers; finally make thermoinduction maneuvering board 9c suffer fatigue rupture, cause travelling contact 9b and each fixed contact 9f deposited.
The deposited meeting of this contact makes air compressor motor coil 1a, 1b continue to be in the previous status of big electric current energising, and motor winding 1a, 1b continue heating, cause coil covered part or insulating material etc. to be destroyed.Therefore, a part of coil does not have covered part each other and is in contact condition, has increased the conductor area, has reduced coil resistance, further causes electric current to increase.
In the overload protection arrangement 30 of present embodiment 1; owing to be equipped with current fusing device 10 as the final means of cutting off electric current; thereby; under the situation of above-mentioned big electric current energising; when reaching the current value of setting, current fusing device 10 rises because of self-heating makes temperature, owing to be warmed up to the fusing point of current fusing device 10 materials; thereby current fusing device 10 fuses with the 10g of fusing portion.During 10 fusing of above-mentioned current fusing device, by the electric energy of giving, the motlten metal vaporize, moment is diffused in the shield member 12 in the overload protection arrangement 30.How the generating capacity of this metal vapor amount is to making the big degree of energy quantitative change that is applied to current fusing device 10, the i.e. degree of voltage rising.
Metallic vapour concentration in shield member 12 becomes under the big situation because the resistance in the metallic vapour becomes very little, electric current by in the metallic vapour to the low side flow of potential difference.That is, between the portion of terminal 10a of current fusing device 10, produce electric arc.
But the overload protection arrangement of execution mode 1 is owing to be provided with the shield member 12 that covers current fusing device 10; though between the portion of terminal 10a of current fusing device 10, produce electric arc; and the generation metallic vapour, still, metallic vapour only spreads being provided with in the space of this shield member 12.
Thereby because electric arc can not be transferred to the outside of the big fuse shield member 12 of resistance, electric arc only makes the metal part vaporize of current fusing device 10, the electric arc spacing is elongated, be used for the can quantitative change big of pilot arc, make the undertension in the supply power of compressor, electric arc rapidly disappears.That is to say,, also can in the very short time, carry out failure of current reliably even when supply voltage becomes big.
In addition, the overload protection arrangement 30 of execution mode 1 does not structurally need in the past overload protection arrangement 30 is carried out big change, and current fusing device 10 is not meticulous parts, thereby the management during manufacturing is carried out easily, has reduced management cost.Because current fusing device 10 itself is cheaply, so overload protection arrangement 30 cheaply can be provided.
Thereby; overload protection arrangement 30 according to execution mode 1; when thermoinduction maneuvering board 9c fatigue rupture, when the generation contact is deposited; do not rely on voltage to compressor 1 supply power; electric arc in the time of can suppressing fuse blows all the time takes place; can reliably carry out failure of current; prevented the scaling loss of the big damage of the compressor that the extensive scaling loss of air compressor motor causes or overload protection arrangement 30 itself fully; improved fail safe; in addition; can not produce misoperation, can obtain the reliability height, overload protection arrangement 30 cheaply.
In addition, the material of above-mentioned shield member 12 preferably has the material of extinguishing arc effect.The extinguishing arc effect of this execution mode 1 means, can absorb and spread the heating that the electric arc that produced causes, reduces the energy that electric arc brings, and eliminates electric arc.As the material with extinguishing arc effect, infiltration effectively has hydroxide and the paper that is made of the non-ignitibility inorfil of glass fibre, glass dust, mica powder etc. etc.These materials produce hydrogen by the heating of electric arc, because this hydrogen is big as the gas pyroconductivity, so, absorb the also heating of diffuse arc, have the extinguishing arc effect.Also can use other materials with extinguishing arc effect.When constituting shield member 12, can eliminate the electric arc that produces in the shield member 12 fast, further obtain safe overload protection arrangement with the material that the extinguishing arc effect is arranged.
In addition, above-mentioned shield member 12 also can be made of the good nonflammable resin of formability, heat-resistant resin etc.In this occasion, because the manufacturing of shield member 12 is simple, so, the low overload protection arrangement of expense 30 can be provided.
Fig. 8 is the skiagraph of the overload protection arrangement of embodiment of the present invention 2, and Fig. 9 is the III-III sectional schematic diagram from Fig. 8 of beneath, and Figure 10 is the IV-IV sectional drawing of Fig. 8 of top observation.In the drawings, the 7th, storage container is made of container 7a and lid 7b, and forms by heat-resistant insulation materials such as synthetic resin.The 9th, by can freely the reverse first thermoinduction telecontrol equipment of earth's axis support fixation of the central fixed axis 9a in this storage container 7, reach a pair of fixed contact 9f that is provided with corresponding to above-mentioned travelling contact 9b by the plate-like thermoinduction maneuvering board 9c with a pair of travelling contact 9b and constitute, this fixed contact 9f is fixed on the fixed terminal 9e that connects the inner bottom surface 7c optional position that is installed on said vesse 7a.
The 13rd, be configured in the wire heater between the inner bottom surface 7c of above-mentioned thermoinduction maneuvering board 9c and said vesse 7a, an end is connected on the said fixing terminal 9e, and the other end is connected to and connects on the distribution 11b.
The 15th, according to above-mentioned heater 13 or with the second thermoinduction telecontrol equipment of the surface temperature action of the irrelevant compressor body (not shown) of the heating of this heater, one end is connected to and being connected on the distribution 11b that above-mentioned heater links to each other by connecting distribution 11, the other end is connected with the end of portion of terminal 10a by connecting distribution 11, and portion of terminal 10a is arranged on the two ends of the current fusing device 10 that is disposed inside the above-mentioned lid 7b.
The another terminal 10a of current fusing device 10 is connected with the fuse terminal 10b that connects the 7c optional position, bottom surface that is installed on said vesse 7a by connecting distribution 11.
The shield member that 12 materials by having the extinguishing arc effect that are arranged on lid 2 the insides are formed can make the apart that is provided with of above-mentioned first thermoinduction telecontrol equipment 9 and above-mentioned current fusing device 10, and be covered with above-mentioned current fusing device 10.
Above-mentioned shield member 12 also can be made of the nonflammable resin that has excellent moldability, heat-resistant resin etc.In this occasion, because the manufacturing of shield member 12 is simple, so, the low overload protection arrangement of expense 30 can be provided.
In the present embodiment; shield member 12 is the devices that prevent that electric arc from producing, and the first thermoinduction telecontrol equipment 9 that overload protection arrangement 30 will be connected in series, wire heater 13, the second thermoinduction telecontrol equipment 15 and current fusing device 10 are with being contained in the storage container 7 as the shield member 12 that prevents the device that electric arc takes place.In addition, fixed terminal 9e and fuse terminal 10b are splicing ears.
In the present embodiment, can obtain the effect same by shield member 12 with execution mode 1.
In execution mode 1 and execution mode 2; the overload protection arrangement 30 of form closed container 1d outside or that use in the control loop 5 of refrigerating air-conditioning unit that is installed in compressor has been described; but in embodiments of the present invention 3, the overload protection arrangement 30 that uses will be described in the closed container 1d of compressor.
Figure 11 is that the overload protection arrangement of embodiment of the present invention 3 is installed to the skeleton diagram on the motor winding in the motor compressor, and Figure 12 is the skeleton diagram on glass capsulation terminal 4 parts of the expression overload protection arrangement closed container 1d inner crest face that is installed to motor compressor.In addition; Figure 13 is the end view of the overload protection arrangement of expression embodiment of the present invention 3; Figure 14 is the plane graph of overload protection arrangement of expression execution mode 3, and Figure 15 is the skiagraph of the overload protection arrangement of execution mode 3, and Figure 16 is that the V-V of Figure 15 is to looking sectional drawing.
In these figure, pressure vessel 7e and lid 7b are constituted hermetic type storage container 7 by gas-tight seals such as welding together.Above-mentioned pressure vessel 7e is by carrying out the pressure processing deep hole pinching to iron plate etc., makes both sides be roughly the part of dome shape, and the central portion by semicircle shape links together both ends, forms oval top shape.Above-mentioned lid 7b, its lower aperture portion is formed by the iron plate that wall thickness is thicker than this pressure vessel 7e.This pressure vessel 7e shape be not limited to so long domed formation.
In the inboard of above-mentioned pressure vessel 7e, by the support 7d that the proper metal plate is made, be connected and fixed the end of thermoinduction maneuvering board 9c, thermoinduction maneuvering board 9c deep hole pinching becomes shallow discoid, has the action reversal temperature in the preset range.At the fixing travelling contact 9b of the other end of thermoinduction maneuvering board 9c.Thermoinduction maneuvering board 9c, support 7d, travelling contact 9b and fixed contact 9f etc. constitute the first thermoinduction telecontrol equipment 9.
Be equipped with through hole 7g, 7g on lid 7b, respectively by having considered the electrical insulating property filling components 19 such as glass of thermal coefficient of expansion, insulation airtightly is fixed with a plurality of conducting terminal pins 20 in this through hole 7g, 7g.Fixed contact 9f is fixed near the inside one side front end of storage container 7 of a conducting terminal pin 20, and with above-mentioned travelling contact 9b face-off and disposing separably.
One end of heater 13 is fixed near the inside one side front end of storage container 7 of another conducting terminal pin 20, and the other end of heater 13 is fixed on the lid 7b.This heater 13 is provided with the thin thread part 13b as the function of current fusing device 10 of area less than other parts.
In the present embodiment; shield member 12 is the devices that prevent that electric arc from producing, the first thermoinduction telecontrol equipment 9 that overload protection arrangement 30 will be connected in series and having as the wire heater 13 of the thin thread part 13b of device for fusing in shield member 12 is contained in the storage container 7 that pressure vessel 7e constitutes.In addition, two conducting terminal pins 20 are splicing ears.
In the present embodiment, the first thermoinduction telecontrol equipment 9 and wire heater 13 are connected in series in the following manner.I.e. being linked in sequence with conducting terminal pin 20, wire heater 13, lid 7b, pressure vessel 7e, metal support 7d, thermoinduction maneuvering board 9c, travelling contact 9b, fixed contact 9f, conducting terminal pin 20.
The following describes action.When the normal operation of compressor 1, the revolution electric current of motor 1c can not make this thin thread part 13b fusing, in addition, because when certain reason makes motor 1c be in restrained condition, because the first thermoinduction telecontrol equipment, 9 counter-rotatings at short notice cause leaving between the contact, therefore, in this occasion, thin thread part 13b can not fuse yet.When these first thermoinduction telecontrol equipment, 9 prolonged and repeated switchings, 9 fatigue ruptures of the first thermoinduction telecontrol equipment make contact deposited.In this occasion, the overcurrent of the restrained condition of motor makes the temperature of the thin thread part 13b of heater 13 rise, fuse.
At this moment, the motlten metal vaporize, be diffused in the shield member 12, between the part of fusing, produce electric arc, but, because metallic vapour almost can not be provided with the outside diffusion of shield member 12 in space of the wire heater 13 thin thread part 13b of device for fusing 10 to covering, therefore, electric arc only produces in this shield member 12, can not shift to other parts.In addition, electric arc makes thin thread part 13b metallic vapourization, has prolonged the distance between electric arc, and the energy quantitative change that is used for pilot arc is big, makes the energy shortage in the compressor supply power, and electric arc rapidly disappears.
That is to say,, also can in the very short time, carry out failure of current reliably even when supply voltage becomes big.
Further, the overload protection arrangement 30 of present embodiment 3 does not structurally need in the past overload protection arrangement 30 is carried out big change, thereby, overload protection arrangement 30 cheaply can be provided.The result; overload protection arrangement 30 according to execution mode 3; when the first thermoinduction maneuvering board 9c fatigue rupture generation contact is deposited; do not rely on voltage to motor compressor 1 supply power; electric arc in the time of can suppressing device for fusing 10 fusing all the time takes place; can reliably carry out failure of current; prevented the scaling loss of the big loss of the motor compressor 1 that the extensive scaling loss of air compressor motor 1c causes or overload protection arrangement 30 itself fully; improve fail safe, can obtain overload protection arrangement 30 cheaply.
Figure 17 is the skiagraph of the overload protection arrangement of execution mode 4; Figure 18 be from the I-I section of beneath Figure 17 to view; Figure 19 be from the II-II section of beneath Figure 17 to view, Figure 20 be from the III-III section of beneath Figure 17 to view.
In these figure, the 7th, storage container is made of container 7a and lid 7b, makes by the heat-resistant insulation material of synthetic resin etc.The 9th, by can freely the reverse first thermoinduction telecontrol equipment of earth's axis support fixation of the central fixed axis 9a in this storage container 7, be made of plate-like thermoinduction maneuvering board 9c with a pair of travelling contact 9b and the fixed contact 9f that is fixed on the fixed terminal 9e that is provided with corresponding to above-mentioned travelling contact 9b, fixed terminal 9e connects the optional position of the bottom surface 7c that is installed on said vesse 7a.
In the present embodiment; shield member 16, shield member 17 are the devices that prevent that electric arc from producing; the formation of overload protection arrangement 30 is that the first thermoinduction telecontrol equipment 9 and the current fusing device 10 that is connected in series is contained in the storage container 7 with shield member 16, shield member 17.In addition, fixed terminal 9e and fuse terminal 10b are splicing ears.
The overload protection arrangement 30 of Gou Chenging is under the situation of single phase poaer supply, identical with above-mentioned situation shown in Figure 3 like this.In addition, in the motor compressor of three phase mains, identical with above-mentioned situation shown in Figure 4.
Moreover as shown in Figures 1 and 2, this overload protection arrangement 30 is to be installed to control machines in the control loop 5 of the surface of closed container 1d of motor compressor 1 or air-conditioner refrigerator unit to be provided with on the narrow like that part of part and to use.This point is identical with the structure of execution mode 1 record.
Below, action is described.Action that the energising of the air compressor motor 1c of thermotropism paratonic movement plate 9c, energising are cut off and the contact when unusual are deposited, and be identical with above-mentioned execution mode 1, and it illustrates omission.
In the overload protection arrangement 30 of this execution mode; owing to be equipped with current fusing device 10 as the final means of cutting off electric current; thereby; under the situation of above-mentioned big electric current energising; when reaching the current value of setting, current fusing device 10 rises because of self-heating makes temperature, owing to be warmed up to the fusing point of current fusing device 10 materials; thereby current fusing device 10 fuses with the 10g of fusing portion.When above-mentioned current fusing device 10 fused, by the electric energy of giving, the melt metal vaporize was diffused in the storage container 7 of overload protection arrangement.How the generating capacity of this metal vapor amount is to making the big degree of energy quantitative change that is applied to current fusing device 10, the i.e. degree of voltage rising.
Usually, have between a plurality of objects of discontiguous potential difference, big in potential difference, distance is near and be full of under the little situation of the resistance in the space between object, the electric current in might this space of course of emergency is an electric arc from the phenomenon of the low side flow of the high side direction current potential of current potential.Under the big situation of metallic vapour in storage container 7,, therefore, be the principal element that produces electric arc because the resistance in the metallic vapour becomes very little.
This phenomenon describes in detail with Figure 21, Figure 22.The state of the current fusing device 10 that Figure 21, Figure 22 show overload protection arrangement 30 in the 10g of fusing portion fusing, after dividing two bodies that are broken into fuse link 10h, 10i for convenience of explanation, illustrates the key diagram except shield member 16,17.Figure 22 be from the IV-IV section of beneath Figure 21 to view.
During current fusing device 10 fusing, generation metallic vapour as indicated above, still, the metal of fusing is whole vaporizes not, on a part of fuse link 10h, 10i that remains in as the fusing vestige shown in 10g, the 10k after the fusing.
At this moment, between the 10h of the 10g of fusing portion and 10i, having the potential difference that is equivalent to service voltage.Similarly, also exist potential difference in the part that electrically contacts with 10h with part that 10i electrically contacts.In Figure 21,, therefore, become the principal element that produces the electric arc shown in 18 because central fixed axis 9a is spatially approaching with fusing vestige 10k, and also exists potential difference between the two.
In addition, in Figure 22, because thermoinduction maneuvering board 9c and fuse terminal 10b are spatially approaching, and, exist potential difference between the two, therefore, also be the principal element that produces the electric arc shown in 18.
If when producing above-mentioned electric arc 18; because current fusing device 10 fusing after-currents still continue to flow, thereby, as all the detailed description that before will solve the invention problem; on compressor, produce big loss, the danger of burning around the thermoinduction maneuvering board that causes overload protection arrangement is arranged.
But therefore the overload protection arrangement 30 of present embodiment, makes the actual range between the different parts of potential difference elongated owing to be provided with shield member 16,17 in above-mentioned space, has got rid of the principal element that produces electric arc.As a result, by the fusing of current fusing device 10, can carry out the cut-out of electric current rapidly.
In addition, the overload protection arrangement 30 of present embodiment does not structurally need in the past overload protection arrangement 30 is carried out big change, and current fusing device 10 is not meticulous parts, thereby the management during manufacturing is carried out easily, has reduced management cost.Because current fusing device 10 itself is cheaply, so overload protection arrangement 30 cheaply can be provided.
Thereby; overload protection arrangement 30 according to present embodiment; when thermoinduction maneuvering board 9c fatigue rupture, when the generation contact is deposited; do not rely on voltage to compressor 1 supply power; electric arc in the time of can suppressing fuse blows all the time takes place; can reliably carry out failure of current; prevented the scaling loss of the big damage of the compressor that the extensive scaling loss of air compressor motor causes or overload protection arrangement 30 itself fully; improved fail safe; in addition; can not produce misoperation, can obtain the reliability height, overload protection arrangement 30 cheaply.
In addition, the material of above-mentioned shield member 16,17 preferably has the material of extinguishing arc effect.The extinguishing arc effect of this execution mode means, can absorb and spread the heating that the electric arc that produced causes, reduces the energy that electric arc brings, and eliminates electric arc.As the material with extinguishing arc effect, infiltration effectively has hydroxide and the paper that is made of the non-ignitibility inorfil of glass fibre, glass dust, mica powder etc. etc.These materials produce hydrogen by the heating of electric arc, because this hydrogen is big as the gas pyroconductivity, so, absorb the also heating of diffuse arc, have the extinguishing arc effect.Also can use other materials with extinguishing arc effect.Constitute shield member 16,17 o'clock with the material that the extinguishing arc effect is arranged, can eliminate the electric arc that produces in the shield member 16,17 fast, further obtain safe overload protection arrangement.
In addition, above-mentioned shield member 16,17 also can be made of the good nonflammable resin of formability, heat-resistant resin etc.In this occasion, because the manufacturing of shield member 16,17 is simple, so, the low overload protection arrangement of expense 30 can be provided.
Execution mode 5
Below, the overload protection arrangement of the embodiment of the present invention 5 of Figure 23～shown in Figure 25 is described.Figure 23 is the skiagraph of overload protection arrangement, Figure 24 be from the V-V section of beneath Figure 23 to view, Figure 25 be observe from the top Figure 23 the VI-VI section to view.
In these figure, the 7th, storage container is made of container 7a and lid 7b, makes by the heat-resistant insulation material of synthetic resin etc.The 9th, by can freely the reverse first thermoinduction telecontrol equipment of earth's axis support fixation of the central fixed axis 9a in this storage container 7, be made of the fixed contact 9f that is fixed on the fixed terminal 9e that is provided with corresponding to a pair of travelling contact 9b, fixed terminal 9e connects on the optional position of the inner bottom surface 7c that is installed on said vesse 7a.
The 13rd, be configured in the wire heater between the inner bottom surface 7c of thermoinduction maneuvering board 9c and container 7a, an end is connected on the fixed terminal 9e, and the other end is connected to and connects on the distribution 11b.
The 15th, according to above-mentioned heater 13 or with the second thermoinduction telecontrol equipment of the surface temperature action of the irrelevant compressor body (not shown) of the heating of this heater 13, one end is connected to and being connected on the distribution 11b that above-mentioned heater 13 links to each other by connecting distribution 11, the other end is connected with the end of portion of terminal 10a by connecting distribution 11, and portion of terminal 10a is arranged on the two ends of the current fusing device 10 that is disposed inside the lid 7b.
The another terminal 10a of current fusing device 10 is connected with the fuse terminal 10b that connects the 7c optional position, bottom surface that is installed on said vesse 7a by connecting distribution 11.
In this structure, the shield member of being made up of the material with extinguishing arc effect 16 is arranged in the container 7a, covers terminal 10b, particularly, with the nearest contact screen of the terminal 10b and the first thermoinduction maneuvering board 9, more particularly, with terminal 10b and heater 13 nearest contact screen.In addition, the shield member of being made up of the material with extinguishing arc effect 17 is arranged on the bottom surface of lid 7b, covers above-mentioned second thermoinduction telecontrol equipment 15 and current fusing device 10.Shield member 16, shield member 17 also can be made of the nonflammable resin that has excellent moldability, heat-resistant resin etc.
In addition, between the second thermoinduction maneuvering board 15 and current fusing device 10a, be provided with protuberance 7f in the inside of lid 7b.Connect the position of not exposing that distribution 11 is configured in the lid the inside.
In the present embodiment, shield member 16, shield member 17 are the devices that prevent that electric arc from producing, and fixed terminal 9e and fuse terminal 10b are splicing ears.The formation of overload protection arrangement 30 is; the first thermoinduction telecontrol equipment 9, heater 13, the second thermoinduction telecontrol equipment 15 and the device for fusing 10 that are connected in series with being contained in the storage container 7 as the shield member 16, the shield member 17 that prevent the device that electric arc produces, can be obtained the effect same with above-mentioned execution mode 2.
Claims (12)
1, a kind of overload protection arrangement comprises:
Its thermoinduction maneuvering board is heated produce paratonic movement, counter-rotating, its a pair of travelling contact and corresponding a pair of fixed contact are in the first thermoinduction telecontrol equipment of contact, contactless state;
The current fusing device that is connected in series with the described first thermoinduction telecontrol equipment;
Be used to hold the storage container of described first thermoinduction telecontrol equipment and current fusing device;
Be connected with described first thermoinduction telecontrol equipment and current fusing device, connect described storage container and reach outside splicing ear, it is characterized in that,
In described storage container, be provided with the device that prevents the electric arc generation that constitutes by shield member.
According to the overload protection arrangement of claim 1 record, it is characterized in that 2, the described device that prevents that electric arc from producing covers the space that is provided with described current fusing device by shield member.
3, the overload protection arrangement of putting down in writing according to claim 1; it is characterized in that, the described device that prevents that electric arc from producing be described current fusing device between the parts of each splicing ear of fusing portion to storage container, be arranged on the shield member between the described parts in the described storage container.
According to each overload protection arrangement of being put down in writing of claim 1～3, it is characterized in that 4, having heaters is connected in series in the series loop of described first thermoinduction telecontrol equipment and described current fusing device.
5, according to each overload protection arrangement of being put down in writing of claim 1～4, it is characterized in that, in the series loop of described first thermoinduction telecontrol equipment and described current fusing device, be connected in series with the second thermoinduction telecontrol equipment.
6, the overload protection arrangement of putting down in writing according to claim 4 is characterized in that, described heater forms thin thread part, constitutes the current fusing device.
According to each overload protection arrangement of being put down in writing of claim 1～6, it is characterized in that 7, described shield member is made of the material with extinguishing arc effect.
According to each overload protection arrangement of being put down in writing of claim 1～6, it is characterized in that 8, described shield member is made of nonflammable resin or heat-resistant resin.
9, a kind of motor compressor is characterized in that, each overload protection arrangement of being put down in writing of claim 1～8 is arranged on the outer wall of closed container of motor compressor.
10, a kind of motor compressor is characterized in that, in each overload protection arrangement of being put down in writing of claim 1～8, storage container is formed by pressure vessel, described overload protection arrangement is arranged in the closed container of motor compressor.
11, a kind of refrigerating air-conditioning is characterized in that, has the motor compressor that claim 9 or claim 10 are put down in writing.
12, a kind of refrigerating air-conditioning is arranged on each overload protection arrangement of being put down in writing of claim 1～8 in the unit controls loop.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP164924/2001 | 2001-05-31 | ||
| JP164924/01 | 2001-05-31 | ||
| JP2001164924 | 2001-05-31 | ||
| JP93760/02 | 2002-03-29 | ||
| JP2002093760A JP2003051232A (en) | 2001-05-31 | 2002-03-29 | Overload-protecting device, electric compressor and refrigerating air conditioner |
| JP93760/2002 | 2002-03-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1389888A true CN1389888A (en) | 2003-01-08 |
| CN1218349C CN1218349C (en) | 2005-09-07 |
Family
ID=26616107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02122170 Expired - Lifetime CN1218349C (en) | 2001-05-31 | 2002-05-31 | Overload protection device, electric compressor and refrigerating air-conditioner apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2003051232A (en) |
| CN (1) | CN1218349C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055174A (en) * | 2009-11-10 | 2011-05-11 | 森萨塔科技麻省公司 | Sealing electric motor protector |
| WO2015058666A1 (en) * | 2013-10-24 | 2015-04-30 | 珠海格力电器股份有限公司 | Compressor overload-protection control method and device |
| CN105370557A (en) * | 2014-08-28 | 2016-03-02 | 上海日立电器有限公司 | Protection system of variable frequency compressor |
| CN108879604A (en) * | 2018-08-07 | 2018-11-23 | 赵云文 | Single-phase electrical appliance crosses heat overload protector |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4519490B2 (en) * | 2004-03-18 | 2010-08-04 | 日立アプライアンス株式会社 | Scroll compressor |
| JP6389603B2 (en) * | 2013-12-02 | 2018-09-12 | デクセリアルズ株式会社 | Switch element, switch circuit, and alarm circuit |
| EP3832824A1 (en) * | 2019-12-03 | 2021-06-09 | Koninklijke Philips N.V. | Apparatus for electrical protection |
-
2002
- 2002-03-29 JP JP2002093760A patent/JP2003051232A/en active Pending
- 2002-05-31 CN CN 02122170 patent/CN1218349C/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055174A (en) * | 2009-11-10 | 2011-05-11 | 森萨塔科技麻省公司 | Sealing electric motor protector |
| CN102055174B (en) * | 2009-11-10 | 2015-05-13 | 森萨塔科技麻省公司 | Sealing electric motor protector |
| WO2015058666A1 (en) * | 2013-10-24 | 2015-04-30 | 珠海格力电器股份有限公司 | Compressor overload-protection control method and device |
| US10228174B2 (en) | 2013-10-24 | 2019-03-12 | Gree Electric Appliances, Inc. Of Zhuhai | Compressor over-load protection control method and apparatus |
| CN105370557A (en) * | 2014-08-28 | 2016-03-02 | 上海日立电器有限公司 | Protection system of variable frequency compressor |
| CN105370557B (en) * | 2014-08-28 | 2018-06-22 | 上海海立电器有限公司 | The protection system of frequency-changeable compressor |
| CN108879604A (en) * | 2018-08-07 | 2018-11-23 | 赵云文 | Single-phase electrical appliance crosses heat overload protector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1218349C (en) | 2005-09-07 |
| JP2003051232A (en) | 2003-02-21 |
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