WO2005112229A1 - 単相誘導電動機の起動装置 - Google Patents
単相誘導電動機の起動装置 Download PDFInfo
- Publication number
- WO2005112229A1 WO2005112229A1 PCT/JP2005/002782 JP2005002782W WO2005112229A1 WO 2005112229 A1 WO2005112229 A1 WO 2005112229A1 JP 2005002782 W JP2005002782 W JP 2005002782W WO 2005112229 A1 WO2005112229 A1 WO 2005112229A1
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- WO
- WIPO (PCT)
- Prior art keywords
- auxiliary
- induction motor
- phase induction
- starting device
- temperature coefficient
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/42—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual single-phase induction motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/04—Asynchronous induction motors for single phase current
- H02K17/08—Motors with auxiliary phase obtained by externally fed auxiliary windings, e.g. capacitor motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/30—Structural association of asynchronous induction motors with auxiliary electric devices influencing the characteristics of the motor or controlling the motor, e.g. with impedances or switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
- H01H50/047—Details concerning mounting a relays
- H01H50/048—Plug-in mounting or sockets
Definitions
- the present invention relates to a starting device for a single-phase induction motor such as a compressor motor for a refrigerator (a hermetic electric compressor) or a pump motor.
- a starting device is often provided in a single-phase induction motor that drives a hermetic compressor such as a refrigerator and an air conditioner.
- a positive characteristic thermistor 212 is connected in series to an auxiliary winding S energized by an AC power supply 140 together with a main winding M, as shown in FIG. Has been provided.
- a starting current flows through the auxiliary winding S because the positive characteristic thermistor 212 exhibits a low electric resistance value.
- the starting current causes the positive temperature coefficient thermistor 212 to have a high resistance, and the current to the auxiliary winding S is limited.
- the positive-characteristic thermistor 212 continues to generate heat by applying the power supply voltage, so that it always consumes about 2 to 4 W of power. Therefore, there is a problem in energy saving.
- the conventional starting device has a problem that it is difficult to restart the single-phase induction motor 100 immediately after stopping.
- the positive temperature coefficient thermistor 212 for startup has a large heat capacity, if the temperature becomes high and the resistance becomes high during operation, after the motor 100 stops, the temperature drops to near normal temperature, and it takes several tens of seconds until it becomes ready to restart. If it is attempted to restart it before that, if the positive temperature coefficient thermistor 212 has a high resistance, only a small current will flow through the auxiliary winding S, and the motor 100 will be in the rotor locked state, and A large current flowed through the line M, and the overload relay 120 was activated and could not be restarted.
- the overload relay Since the return time of this overload relay is initially shorter than the cooling time until the positive temperature coefficient thermistor 212 can be restarted, the overload relay is repeatedly operated and returned several times until the temperature rises in sequence and the temperature rises. Return time is longer. Then, the return time of the overload relay is longer than that of the positive characteristic thermistor 212, so that the electric motor 100 can be started.
- the situation is that the refrigerator In the case of the presser motor, the temperature was lowered, the thermostat was turned off, and immediately after the compressor motor was stopped, the door was opened, the temperature in the refrigerator was raised, and the thermostat was turned on. In such a case, it takes a long time to restart, which also shortens the life of the above-mentioned overload relay.
- Patent Document 1 a starting device for a single-phase induction motor having a configuration shown in FIG. 15 (B).
- a bimetal 218 is provided in series with the positive temperature coefficient thermistor 212 in the starting device 210, and the bimetal 218 is heated by a resistor 214 provided in parallel with the positive temperature coefficient thermistor 212. Cut off. The low power consumption is achieved by maintaining the off state of the bimetal 218 by using the resistor 214 that consumes less power than the thermistor 212.
- Patent Document 2 discloses an activation device in which a positive characteristic thermistor is divided into two and arranged.
- Patent Document 1 JP-A-6-38467 (FIG. 6)
- Patent Document 2 Japanese Utility Model Publication No. 56-38276 (Fig. 2)
- the present invention has been made to solve the above-described problems, and it is an object of the present invention to minimize power consumption during steady operation and to achieve energy saving. It is an object to provide a starting device for a single-phase induction motor. Means for solving the problem
- the invention of claim 1 is directed to a main winding energized by an AC power supply.
- a positive temperature coefficient thermistor connected in series to the auxiliary winding
- a snap-action bimetal connected in series with the series circuit of the auxiliary winding and the positive temperature coefficient thermistor, which senses heat from the auxiliary positive temperature coefficient thermistor and turns off when the temperature reaches a set temperature;
- a first housing chamber provided in the casing and housing the snap action bimetal and the auxiliary positive temperature coefficient thermistor
- a heat insulator disposed between the auxiliary positive temperature coefficient thermistor and the first storage chamber and between the snap action bimetal and the first storage chamber. Is a technical feature.
- the invention of claim 2 provides a starting device for a single-phase induction motor having a main winding and an auxiliary winding energized by an AC power supply.
- a positive temperature coefficient thermistor connected in series to the auxiliary winding
- a snap-action bimetal connected in series with the series circuit of the auxiliary winding and the positive temperature coefficient thermistor, which senses heat from the auxiliary positive temperature coefficient thermistor and turns off when the temperature reaches a set temperature;
- a first housing chamber provided in the casing and housing the snap action bimetal and the auxiliary positive temperature coefficient thermistor
- a starting device for a single-phase induction motor wherein a projection for reducing a contact area with the auxiliary positive temperature coefficient thermistor is provided at a contact portion of the first accommodation room with the auxiliary positive temperature coefficient thermistor.
- the starting device for a single-phase induction motor of claim 1 and claim 2 when the single-phase induction motor is started, the positive-characteristic thermistor has low resistance, so that the positive-characteristic thermistor and the snap
- the starting current flows through the auxiliary winding through the action bimetal series circuit, and starts the single-phase induction motor.
- the positive temperature coefficient thermistor self-heats and becomes high resistance, and much current flows to the auxiliary positive temperature coefficient thermistor connected in parallel with the positive temperature coefficient thermistor.
- the snap action bimetal is turned off, no current flows through the PTC thermistor, and the single-phase induction motor completes startup and enters steady operation.
- the starting PTC thermistor having a large heat capacity is cooled to room temperature.
- the auxiliary positive temperature coefficient thermistor cools quickly because of its small heat capacity. Therefore, even when the single-phase induction motor is restarted immediately after stopping, the auxiliary temperature coefficient thermistor is immediately cooled down to near normal temperature, and the time required for restarting becomes extremely short, from several seconds to several tens of seconds.
- the overload relay can be restarted quickly without repeating the operation and return of the overload relay as in the prior art.
- the snap action bimetal and the auxiliary positive temperature coefficient thermistor are housed in the first housing chamber in the casing, and the auxiliary positive temperature coefficient thermistor and the first housing chamber are connected to each other. Insulation is interposed between the snap action bimetal and the first storage chamber, so that the heat of the auxiliary positive temperature coefficient thermistor and the snap action bimetal escapes to the casing side, and the power consumption is extremely small. With snap action bimetal Can be kept off.
- the snap action bimetal and the auxiliary positive temperature coefficient thermistor are accommodated in the first accommodating chamber in the casing, and correspond to the auxiliary positive temperature coefficient thermistor in the first accommodating chamber.
- a convex part is provided in the contact area to reduce the contact area with the auxiliary positive temperature coefficient thermistor, so that the heat of the auxiliary positive temperature coefficient thermistor escapes to the casing side, turning off the snap action bimetal with extremely low power consumption. Can be maintained.
- the operating time of the snap action bimetal can be appropriately adjusted by the adjusting mechanism.
- the positive current thermistor has a sufficiently high resistance to reduce the starting current.
- the high expansion side plate constituting the snap action bimetal is made of Ni-Cr-Fe or Ni-Mn-Fe, and the low expansion side plate is made of Ni-Fe. Since the rate is good, the snap action bimetal can be operated in a short time. For this reason, it is possible to suppress energy consumption caused by a long start-up current flowing through the auxiliary winding through the series circuit of the positive characteristic thermistor and the snap action bimetal.
- the crank portion provided on the metal terminal plate is brought into contact with the opening of the through hole between the first housing chamber and the second housing chamber. Since the through hole is closed, the first storage chamber can be sealed. Even if a flammable gas (a hydrocarbon compound such as butane) is used as the refrigerant for the hermetic compressor and the refrigerant leaks, the refrigerant is stored in the hermetically sealed first storage chamber. Opening and closing of the action bimetal.
- a flammable gas a hydrocarbon compound such as butane
- an extension portion extending along a side wall of the first housing portion is provided on a lid that covers the first housing portion, and the first housing portion is provided. Sealed. Even if a flammable gas (a hydrocarbon compound such as butane) is used as the refrigerant of the hermetic compressor and the refrigerant leaks, the refrigerant is stored in the closed first storage chamber. It does not ignite due to arcing during opening / closing of the snap action bimetal.
- a flammable gas a hydrocarbon compound such as butane
- the snap action bimetal can be operated in a short time. For this reason, it is possible to suppress energy consumption due to a long start-up current flowing through the auxiliary winding through the series circuit of the positive characteristic thermistor and the snap action bimetal.
- the heat insulating material is made of aramid paper, it is easy to bend and can be folded and stored in the first storage chamber.
- the heat insulating material is made of a foamed resin, the heat insulating property is high.
- the heat insulating material is made of a heat insulating paint, a high heat insulating effect can be obtained by applying the heat insulating material to the first storage chamber.
- the starting device 10 of the first embodiment is attached to a pin terminal plate 110 of a dome 104 of a compressor 102 and protected by a cover 106.
- a motor 100 is housed inside the compressor 102.
- the starting device 10 houses an overload relay (not shown).
- the pin terminal plate 110 is provided with pin terminals 112, 114, and 116.
- FIG. 2 is a circuit diagram of a starting device for a single-phase induction motor and an overload relay 120 according to the first embodiment.
- the power supply terminals 142 and 144 are connected to a 100 V single-phase AC power supply 140, and one of the power supply terminals 142 is connected to a power supply line 156 via an operation switch 146 and an overload relay 120 in series.
- the power supply terminal 144 is connected to a power supply line 148.
- the overload relay 120 is composed of a no-metal relay 124 and a heater 122 for heating the bimetal 124.
- the bimetal 124 interrupts the current due to the heat generated by the heater 122, and When the temperature drops to room temperature due to the cutoff, the bimetal 124 automatically recovers and resumes power supply.
- the single-phase induction motor 100 has a main winding M and an auxiliary winding S, and the main winding M Is connected between the power supply lines 156 and 148, and one terminal of the auxiliary winding S is connected to the power supply line 156.
- the single-phase induction motor 100 drives the hermetic compressor 102 described above with reference to FIG. 1 of a refrigeration cycle in a refrigerator, for example.
- the operation switch 146 is turned on and off by, for example, a temperature control device (not shown). The operation switch 146 turns on when the temperature in the refrigerator reaches the upper limit temperature, and turns off when the temperature in the refrigerator reaches the lower limit temperature.
- the other terminal of the auxiliary winding S is connected to a power supply line 148 via a series circuit of a positive temperature coefficient thermistor (hereinafter referred to as main PTC) 72 and a normally closed snap action bimetal 94.
- main PTC positive temperature coefficient thermistor
- auxiliary PTC normally closed snap action bimetal
- the main PTC 72 and the auxiliary PTC 50 are made of, for example, an oxide semiconductor ceramic containing barium titanate as a main component, have a Curie temperature, and the electric resistance value sharply increases from this Curie temperature. Has characteristics.
- the positive characteristic thermistor 72 has, for example, about 5 ⁇ at room temperature (around 25 ° C.), about 0.1 lk Q at 120 ° C., and about lk Q—10 k Q at 140 ° C.
- the auxiliary PT C50 has a higher resistance value than the main PTC 72, and the heat capacity is set to 1/3 to 1/10 (optimally about 1/6) so that power consumption is 1/3 to 1/10. Have been.
- the snap bimetal 94 senses the heat generated by the auxiliary PTC 50 and turns on and off. When the sensed heat reaches, for example, a set temperature of 140 ° C., the snap bimetal 94 turns off.
- the operation of the activation device 10 of the first embodiment will be described.
- the operation switch 146 When the operation switch 146 is turned on, an activation current flows through the main winding M via the operation switch 146 and the overload relay 120.
- the main PTC 72 has a low electric resistance value (for example, about 5 ⁇ ) at room temperature, the starting current is generated in the auxiliary winding S, the series circuit of the main PTC 72 and the snap action bimetal 94, and the parallel circuit of the auxiliary PTC 50.
- the flow causes the single-phase induction motor 100 to start.
- the main PTC 72 and the auxiliary PTC 50 When the starting current of the auxiliary winding S flows through the main PTC 72, the main PTC 72 and the auxiliary PTC 50 generate heat by themselves, and the electric resistance value increases rapidly. After a few seconds, the main PTC72 and auxiliary PTC50 reach a temperature of 140 ° C. At this time, the electric resistance of the main PTC72 becomes, for example, lk ⁇ 10 kQ, and the current flowing through the snap action bimetal 94 decreases. I do. Auxiliary PTC50 When the temperature of S140 ° C is reached, the snap action bimetal 94 senses this and turns off, and no current flows through the series circuit of the main PTC 72 and the snap action bimetal 94. The startup of the phase induction motor 100 is completed, and steady operation is performed.
- main PTC 72 having a large heat capacity is cooled to room temperature.
- the auxiliary PTC50 has a small heat capacity and therefore cools quickly. Therefore, even when the single-phase induction motor 100 is restarted immediately after it stops, the auxiliary PTC50 is cooled down to near room temperature immediately, so that the restarting time is very short, from several seconds to several tens of seconds. As in the prior art, the overload relay can be restarted quickly and quickly without repeatedly operating and returning.
- FIG. 3 (A) is a front view of the activation device 10
- FIG. 3 (B) is a rear view
- FIG. 3 (C) is a side view from the arrow c side in FIG. 3 (A).
- 3 (D) is a side view from the arrow d side in FIG. 3 (A)
- FIG. 3 (E) is a perspective view from the arrow e side in FIG. 3 (A).
- the activation device 10 has a cap 32 attached to the upper surface of the main body case 20 and a cover 34 attached to the lower surface.
- the cover 34 is fixed to the main body case 20 by a stopper 42.
- the starting device 10 is provided with a main winding terminal 40, an independent terminal 44 for connection to a power supply line and an external device, and a relay terminal 46.
- the independent terminal 44 and the relay terminal 46 are not connected to the activation device 10 side, and the main winding terminal 40 is connected to a second receptacle (described later) of the activation device 10. Terminal is connected to the 64 terminal.
- FIG. 4A is a plan view of the state in which the cap 32 is removed from the activation device 10 in FIG. 3A, that is, a plan view.
- FIG. 4B is a plan view.
- FIG. 4 is a bottom view of the state in which the cover 34 has been removed from the activation device 10 in FIG. 5 is a perspective view of the activation device 10 shown in FIG. 4A
- FIG. 6 is a perspective view of the activation device 10 shown in FIG. 4B
- FIG. 4A and FIG. 5 an airtight chamber (first accommodation chamber) 22 for accommodating the bimetal 94 and the auxiliary PTC 50 is formed in the main body case 20.
- the base of the bimetal 94 is in contact with the auxiliary PTC 50, and the movable contact 96 of the bimetal 94 is arranged so as to be able to contact and separate from the fixed contact 92 fixed to the fixed contact plate 90.
- the main body case 20 is formed with a storage chamber (second storage chamber) 24 for storing the main PTC 72.
- the main body case 20 is provided with a first receptacle terminal 62 connected to the pin terminal 116 described above with reference to FIG. 1B, and a second receptacle terminal 64 connected to the pin terminal 114.
- the first receptacle terminal 62 is connected to the spring terminal 48R via the first connecting plate 66.
- the spring terminal 48R is in contact with the main PTC 72.
- a spring terminal 48L is in contact with the other surface of the main PTC 72.
- the spring terminal 48R and the spring terminal 48L elastically hold the main PTC 72 mutually.
- the spring terminal 48L is connected to a fixed contact plate 90 shown in FIG.
- the fixed contact 92 provided on the fixed contact plate 90 contacts the movable contact 96 of the bimetal 94 shown in FIGS. 4A and 5, and the base of the metal plate 94 is connected to the third connecting plate 70.
- the third connecting plate 70 is connected to the second receptacle terminal 64.
- the right side surface of the auxiliary PTC 50 shown in FIG. 4A is connected to the second receptacle terminal 64 via the bimetal 94 and the third connection plate 70.
- a spring terminal 98 is in contact with the left side surface of the auxiliary PTC 50 shown in FIG. 4 (A), and the spring terminal 98 is connected to the first receptacle terminal 62 via a spring terminal 48R. I have.
- FIG. 8 (B) is a cross-sectional view along line X1-X1 in FIG. 4 (A), and FIG. 8 (A) is an enlarged view of a portion surrounded by a circle C1 in FIG. 8 (B).
- a first step portion 22a projecting upward is formed below the auxiliary PTC 50 of the airtight chamber 22 and a second step portion 22b projecting downward below the first step portion 22a below the spring terminal 98.
- Insulating paper 54 made of aramid paper or the like bent in a crank shape along the upper surface of the side wall of the airtight chamber 22, the upper surface and the side wall of the first step portion 22a, and the upper surface of the second step portion 22b is interposed. .
- the bottom surface of the auxiliary PTC 50 is in contact with the upper surface of the first step portion 22a via the heat insulating paper 54
- the side surface of the auxiliary PTC 50 is in contact with the bimetal 94
- the bimetal 94 is the side wall of the airtight chamber 22 through the heat insulating paper 54.
- the bottom surface of the panel terminal 98 supporting the auxiliary PTC 50 is in contact with the second step portion 22b via the heat insulating paper 54. Since the heat insulating paper 54 made of aramide paper is used, it can be easily folded and can be folded and stored in the airtight chamber 22.
- As the heat insulating material in addition to heat insulating paper made of various resins, foamed resin, heat insulating paint, and the like can be used.
- the snap action bimetal 94 and the auxiliary PTC 50 are accommodated in the hermetic chamber 22 in the main body case 20, and the insulating paper is provided between the auxiliary PTC 50 and the bimetal 94 and the hermetic chamber 22. Since 54 is interposed, heat of auxiliary PTC 50 and bimetal 94, high thermal conductivity made of phenol resin and unsaturated polyester, and escape to main body case 20 side No further inflow of outside air, so extremely low consumption Electricity can keep bimetal 94 off.
- FIG. 9 (A) is a plan view of the activation device 10 shown in FIG. 4 (A) before the auxiliary PTC 50 or the like is attached
- FIG. 9 (B) is a circle in FIG. 9 (A). It is an enlarged view of the part enclosed with C2.
- FIG. 9 (C) is a sectional view taken along line Y1-Y1 of the activation device 10 shown in FIG. 4 (A)
- FIG. 9 (D) is an enlarged view of a portion surrounded by a circle C3 in FIG. 9 (C). is there.
- a first step portion 22a projecting upward is formed below the auxiliary PTC 50 of the hermetic chamber 22, and the first step portion 22a is formed as shown in FIG. 9 (D).
- the contact area between the auxiliary PTC 50 and the main body case 20 is reduced by making the upper part of the step 22a semicircular.
- a pair of protrusions 22e is provided on the side wall (right side in FIG. 9 (B)) that constitutes the airtight chamber 22 so that the contact between the auxiliary PTC 50 and the main body case 20 can be made. The area is reduced.
- a support piece 28 extending to the side of the auxiliary PTC 50 is provided, and the tip of the support piece 28 is tapered, and the tip of the support piece 28 has a semi-circular cross section, so that the contact between the auxiliary PTC 50 and the main body case 20 is made. The contact area is reduced.
- the auxiliary PTC50 projects upward in the vertical direction in Fig. 9 (B). The movement is restricted by being sandwiched between the connecting portion 26 and the supporting piece 28 which are connected to each other.
- a second step portion 22b is formed below the panel terminal 98 and protrudes upward below the first step portion 22a.
- a pair of convex portions 22d is provided on the side wall (left side in FIG. However, it is configured such that heat from the auxiliary PTC 50 does not easily escape through the panel terminal 98.
- the bimetal 94 and the auxiliary PTC 50 are housed in the hermetic chamber 22 in the main body case 20, and the contact area between the auxiliary PTC 50 and the auxiliary PTC 50 in the hermetic chamber 22 is reduced.
- a first step portion 22a and a convex portion 22e are provided. Therefore, the heat of the auxiliary PTC 50 escapes to the main body case 20 side, so that the bimetal 94 can be maintained at an extremely low power consumption.
- FIG. 10 (A) is a side view of the starter 10 shown in FIG. 3 (A) with the cap 32 removed
- FIG. 10 (B) is a circle C4 in FIG. 10 (A). It is an enlarged view of the enclosed part.
- FIG. 10 (C) is an enlarged view of a portion surrounded by a circle C5 in FIG. 4 (A).
- a screw guide plate 56 for holding the adjustment screw 58 is provided on the side of the fixed contact plate 90.
- the tip of the adjusting screw 58 presses the fixed contact plate 90 to change the position of the fixed contact 92, thereby adjusting the operation time of the bimetal 94 (normal temperature). (Less than 40 seconds at 25 ° C).
- the adjusting screw 58 can adjust the operating time of the bimetal 94 appropriately. As a result, while suppressing the energy consumption due to the long start-up current flowing through the auxiliary winding through the series circuit of the main PTC 72 and the bi-metal 94, the main PTC 72 becomes sufficiently high in resistance and the start-up current is reduced. By operating the 94 (for more than 3 seconds, the starting winding current is several tens of mA), it is possible to prevent arcing when the bimetal 94 is turned off.
- the high-expansion side plate constituting the bimetal 94 is made of Ni_Cr to Fe or Ni_Mn_Fe, and the low-expansion side plate is made of Ni_Fe so that the thermal conductivity is good. Therefore, the bimetal 94 can be operated in a short time. Therefore, the main PTC72 and bimetal 94 It is possible to reduce the energy consumption due to the start-up current flowing through the auxiliary winding through the column circuit for a long time.
- the no-metal 94 prevents the occurrence of chattering due to a small temperature difference at the end of life by setting the difference between the operating temperature and the return temperature to 2 ° C or more. This eliminates chattering even after the required life of 500,000 times.
- the bimetallic 94 has an operation time of 40 seconds or less at normal temperature (25 ° C.) and can operate even at low temperature (110 ° C.).
- FIG. 11A is a cross-sectional view along X2-X2 of the activation device 10 in FIG. 4A
- FIG. 11B is an enlarged view of a portion surrounded by a circle C6 in FIG. 11A
- FIG. 11 (C) is an enlarged view of a portion surrounded by a circle C7 in FIG. 11 (A)
- FIG. 11 (D) is an X3-X3 of the activation device 10 in FIG. 4 (A).
- FIG. 11 (E) is an enlarged view of a portion surrounded by a circle C8 in FIG. 11 (D).
- a through hole 23A for inserting the second connecting plate 68 is provided between the airtight chamber 22 and the accommodation chamber 24.
- the second connecting plate 68 is bent into a crank shape, closes the opening of the through hole 23A at the portion bent in the crank shape, and the airtight chamber 22 is closed. It is configured to increase airtightness.
- a through hole 23B is formed between the airtight chamber 22 and the housing chamber 24 to allow the extension of the panel terminal 48R to pass therethrough.
- the extending portion of the spring terminal 48R is bent into a crank shape, and closes the opening of the through hole 23B at the portion bent in the crank shape, and
- the closed room 22 is configured to increase the airtightness.
- the airtightness can be improved by forming the through holes 23A and 23B to be narrow.
- the holes 23A and 23B are formed to be narrow, the life of the mold is shortened, and the extending portions of the second connecting plate 68 and the panel terminals 48R are reduced. It is difficult to communicate.
- the extending portion of the second connecting plate 68 and the panel terminal 48R is bent into a crank shape and brought into contact with the openings of the through holes 23A and 23B, thereby improving the airtightness at low cost.
- FIG. 11 (C) which is an enlarged view of a portion surrounded by a circle C7 in FIG. 11 (A)
- a cap 32 which covers the airtight chamber 22 is provided with an upper surface of a side wall of the airtight chamber 22.
- an inverted L-shaped extending portion 32a extending along the outer surface of the airtight chamber 22 is provided. Is increasing.
- the airtightness of the airtight chamber 22 accommodating the bimetal 94 in which an arc is likely to be generated is increased. Even if a flammable gas (a hydrocarbon compound such as butane) is used as a refrigerant for the hermetic compressor and the refrigerant leaks, even if the refrigerant leaks, the bimetal 94 contained in the hermetically sealed airtight chamber 22 can be used. Does not ignite due to arcing during opening and closing operations.
- a flammable gas a hydrocarbon compound such as butane
- FIG. 12 (A) is a perspective view showing the starting device 10 and the overload relay 120 before assembly
- FIG. 12 (B) is a perspective view showing the starting device 10 and the overload relay 120 after assembly. .
- the starting device 10 is provided with a housing recess 12 for housing the overload relay 120, and the assembly is completed by fitting the overload relay 120 into the housing recess 12. With the overload relay 120 assembled, the starting device 10 is attached to the pin terminal plate 110 of the dome 104 of the compressor 102 as described above with reference to FIG.
- FIG. 13A is a plan view of the activation device 10 according to the second embodiment with the cap 32 removed
- FIG. 13B is a cross-sectional view of the activation device 10 taken along the line X4—X4 in FIG.
- FIG. 13 (C) is an enlarged view of a portion surrounded by a circle C9 in FIG. 13 (B).
- the activation device 10 of the second embodiment is substantially the same as the activation device 10 of the first embodiment. However, in the starting device 10 of the second embodiment, a heat conducting plate 76 having a good thermal conductivity such as a copper alloy or an aluminum alloy is arranged between the auxiliary PTC 50 and the bimetal 94.
- the heat conducting plate 76 is interposed between the bimetal 94 and the auxiliary PTC 50, so that the heat of the auxiliary PTC50 force is efficiently transmitted to the bimetal 94, and the bimetal 94 operates in a short time. Let me do. For this reason, it is supplemented through the main PTC72 and bimetal 94 series circuit. Energy consumption due to the starting current flowing through the winding for a long time can be suppressed.
- FIG. 14A is an enlarged cross-sectional view of the airtight chamber of the activation device according to the third embodiment.
- insulating paper is used as a heat insulating material interposed between the auxiliary positive temperature coefficient thermistor 50 and the bimetal 94 and the hermetic chamber 22.
- an insulating member 54b made of a foamed resin is used. In the third embodiment, since a foamed resin is used, a high heat insulating effect can be obtained.
- FIG. 14B is an enlarged cross-sectional view of the airtight chamber of the activation device according to the fourth embodiment.
- insulating paper is used as a heat insulating material interposed between the auxiliary positive temperature coefficient thermistor 50 and the bimetal 94 and the hermetic chamber 22.
- the insulating paint 54c is used as a heat insulating material.
- the heat insulating material is made of the heat insulating paint 54c, it is possible to obtain a very high heat insulating effect by applying the heat insulating material 54c to the hermetic chamber 22 without gaps.
- the present invention can be applied not only for driving a closed type compressor of a refrigeration cycle in a refrigerator, but also for driving a closed type compressor of a refrigeration cycle in an air conditioner.
- the present invention can be appropriately modified and implemented within a range not departing from the gist, for example, the present invention can be applied to all devices using a single-phase induction motor as a drive source.
- FIG. 1 (A) is an explanatory view showing attachment of a starting device and an overload relay to a compressor according to a first embodiment
- FIG. 1 (B) is a perspective view of a pin terminal.
- FIG. 2 is a circuit diagram of a starting device and an overload relay according to the first embodiment.
- FIG. 3 (A) is a front view of the activation device 10, FIG. 3 (B) is a rear view, and FIG. 3 (C) is a side view from the arrow c side in FIG. 3 (A).
- 3 (D) is a side view from the side of arrow d in FIG. 3 (A), and
- FIG. 3 (E) is a perspective view from the side of arrow e in FIG. 3 (A).
- FIG. 4 (A) is a plan view showing a state in which the cap 32 is removed from the starting device 10 in FIG. 3 (A), and FIG. 4 (B) is a starting device in FIG. 3 (A).
- FIG. 10 is a bottom view of the state where a cover 34 has been removed from 10.
- FIG. 4 (A) is a perspective view of the activation device 10 shown in FIG. 4 (A).
- FIG. 6 is a perspective view of the activation device 10 shown in FIG. 4 (B).
- FIG. 7 is a set diagram of an activation device.
- FIG. 8 (B) is a cross-sectional view taken along line XI-XI in FIG. 4 (A), and FIG. 8 (A) is an enlarged view of a portion surrounded by a circle C1 in FIG. 8 (B). is there.
- FIG. 9 (A) is a plan view of the activation device 10 shown in FIG. 4 (A) before the auxiliary PTC 50 or the like is attached
- FIG. 9 (B) is a plan view of FIG. 9 (A). It is an enlarged view of the site
- FIG. 9 (C) is a sectional view taken along line Y1-Y1 of the activation device 10 shown in FIG. 4 (A)
- FIG. 9 (D) is an enlarged view of a portion surrounded by a circle C3 in FIG. 9 (C). is there.
- FIG. 10 (A) is a side view of the starting device 10 shown in FIG. 3 (A) with the cap 32 removed
- FIG. 10 (B) is a side view of FIG. 10 (A).
- 3 is an enlarged view of a portion surrounded by a circle C4.
- FIG. 10 (C) is an enlarged view of a portion surrounded by a circle C5 in FIG. 4 (A).
- FIG. 11 (A) is a cross-sectional view along X2-X2 of the activation device 10 in FIG. 4 (A), and FIG. 11 (B) is a portion surrounded by a circle C6 in FIG. 11 (A).
- 11 (C) is an enlarged view of a portion surrounded by a circle C7 in FIG.11 (A), and FIG.11 (D) is an enlarged view of the starting device 10 in FIG.4 (A).
- FIG. 11 (E) is an enlarged view of a portion surrounded by a circle C8 in FIG. 11 (D).
- FIG. 12 (A) is a perspective view showing the starting device 10 and the overload relay 120 before assembly
- FIG. 12 (B) is a perspective view showing the starting device 10 and the overload relay 120 after assembly.
- FIG. 13 (A) is a plan view of the activation device 10 according to the second embodiment with the cap 32 removed
- FIG. 13 (B) is the X4 of the activation device 10 in FIG. 13 (A).
- FIG. 13 (C) is an enlarged view of a portion surrounded by a circle C9 in FIG. 13 (B).
- FIG. 14 (A) is an enlarged cross-sectional view of the airtight chamber of the activation device of the third embodiment
- FIG. 14 (B) is an enlarged cross-sectional view of the airtight chamber of the fourth embodiment.
- FIG. 15 (A) is a circuit diagram of a starting device according to the related art
- FIG. 15 (B) is a patent document.
- FIG. 1 is a circuit diagram of a starting device according to the first embodiment. Explanation of reference numerals
Abstract
Description
Claims
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JP2004-145096 | 2004-05-14 | ||
JP2004145096 | 2004-05-14 |
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WO2005112229A1 true WO2005112229A1 (ja) | 2005-11-24 |
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PCT/JP2005/002782 WO2005112229A1 (ja) | 2004-05-14 | 2005-02-22 | 単相誘導電動機の起動装置 |
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Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0638467A (ja) * | 1992-07-09 | 1994-02-10 | Yamada Denki Seizo Kk | 単相誘導電動機の起動装置 |
JPH07170697A (ja) * | 1994-08-02 | 1995-07-04 | Toshiba Home Technol Corp | モータの通電制御装置 |
JPH07201520A (ja) * | 1993-12-28 | 1995-08-04 | Sanyo Electric Co Ltd | 正特性サーミスタ装置 |
JPH07201513A (ja) * | 1993-12-28 | 1995-08-04 | Sanyo Electric Co Ltd | 正特性サーミスタ装置 |
JPH08154367A (ja) * | 1994-11-28 | 1996-06-11 | Yamada Denki Seizo Kk | 冷蔵庫用モータの起動装置 |
JPH09294387A (ja) * | 1996-04-25 | 1997-11-11 | Murata Mfg Co Ltd | モータ起動用部品 |
JP2005073330A (ja) * | 2003-08-21 | 2005-03-17 | Yamada Electric Mfg Co Ltd | 単相誘導電動機の起動装置、起動装置を用いた密閉形電動圧縮機及びこれを用いる機器 |
JP2005073329A (ja) * | 2003-08-21 | 2005-03-17 | Yamada Electric Mfg Co Ltd | 単相誘導電動機の起動装置、単相誘導電動機の起動装置及び過負荷保護装置、及び、起動装置を用いた密閉形電動圧縮機 |
-
2005
- 2005-02-22 WO PCT/JP2005/002782 patent/WO2005112229A1/ja active Application Filing
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0638467A (ja) * | 1992-07-09 | 1994-02-10 | Yamada Denki Seizo Kk | 単相誘導電動機の起動装置 |
JPH07201520A (ja) * | 1993-12-28 | 1995-08-04 | Sanyo Electric Co Ltd | 正特性サーミスタ装置 |
JPH07201513A (ja) * | 1993-12-28 | 1995-08-04 | Sanyo Electric Co Ltd | 正特性サーミスタ装置 |
JPH07170697A (ja) * | 1994-08-02 | 1995-07-04 | Toshiba Home Technol Corp | モータの通電制御装置 |
JPH08154367A (ja) * | 1994-11-28 | 1996-06-11 | Yamada Denki Seizo Kk | 冷蔵庫用モータの起動装置 |
JPH09294387A (ja) * | 1996-04-25 | 1997-11-11 | Murata Mfg Co Ltd | モータ起動用部品 |
JP2005073330A (ja) * | 2003-08-21 | 2005-03-17 | Yamada Electric Mfg Co Ltd | 単相誘導電動機の起動装置、起動装置を用いた密閉形電動圧縮機及びこれを用いる機器 |
JP2005073329A (ja) * | 2003-08-21 | 2005-03-17 | Yamada Electric Mfg Co Ltd | 単相誘導電動機の起動装置、単相誘導電動機の起動装置及び過負荷保護装置、及び、起動装置を用いた密閉形電動圧縮機 |
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