JP2002332964A - Refrigerant compressor starting device and refrigerant compressor - Google Patents

Abstract

(57) [Summary] [PROBLEMS] For a cooling device such as a refrigerator, the energy efficiency of a refrigerant compressor is significantly improved, thereby increasing the overall efficiency of a refrigeration cycle and reducing the power consumption of the cooling device. SOLUTION: The refrigerant compressor includes a refrigerant compressor for compressing the refrigerant, a condenser for condensing the refrigerant, a dryer for drying the refrigerant, an expansion mechanism for expanding the refrigerant, and an evaporator for evaporating the refrigerant. The starting device of the induction synchronous motor for driving the motor uses a heat sensitive element having a characteristic that the temperature coefficient of the electric resistance is positive and the resistance value changes suddenly at a predetermined temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor, such as a refrigerator or a refrigeration apparatus, which compresses and vaporizes a refrigerant and then liquefies the refrigerant.
The present invention relates to a cooling device provided with a refrigeration cycle for expanding the liquefied refrigerant, and more particularly to a refrigerant compressor in which the efficiency of an electric motor driving a refrigerant compressor is improved.

[0002]

2. Description of the Related Art In recent years, when a refrigerant compressor is applied to a refrigerator or the like, there is a strong demand for reduction of power consumption and noise during operation. In order to meet these demands, the energy efficiency (COP) of the refrigerant compressor has been improved.

A conventional cooling device is disclosed in Japanese Patent No. 29675.
No. 74 is disclosed.

Hereinafter, the conventional refrigerant compressor will be described with reference to the drawings.

FIG. 10 is a refrigeration cycle diagram of a cooling device using a conventional refrigerant compressor. In FIG. 10, a refrigerant compressor 56 driven by an AC induction motor compresses a low-temperature, low-pressure refrigerant gas 55, discharges a high-temperature, high-pressure refrigerant gas 55 and sends it to the condenser 16. The refrigerant gas 55 sent to the condenser 16 becomes a high-temperature, high-pressure refrigerant liquid while releasing the heat into the air, and is sent to the expansion mechanism 18 (for example, an expansion valve or a capillary tube) via the dryer 17. The high-temperature, high-pressure refrigerant liquid passing through the expansion mechanism 18 becomes low-temperature, low-pressure wet steam by the throttle effect and is sent to the evaporator 19. The wet vapor-like refrigerant gas 55 entering the evaporator 19 absorbs heat from the surroundings and evaporates, and the low-temperature, low-pressure refrigerant gas 55 exiting the evaporator 19 is sucked into the compressor 56, and the same cycle is repeated thereafter. It is.

An AC induction motor disclosed in Japanese Patent Publication No. 61-32908 is generally known as a conventional motor for driving a refrigerant compressor.

As a conventional starting device for a refrigerant compressor, one disclosed in Japanese Patent Application Laid-Open No. 50-1312 is known. The starting device of the refrigerant compressor is a thermosensitive element (hereinafter, referred to as PTCR) made of a titanate-based semiconductor, the electric resistance of which has a positive temperature coefficient, and the resistance changes rapidly at the Curie temperature.

Further, an AC induction motor having a starting capacitor and an operating capacitor is widely used for the purpose of improving startability and reducing power consumption.

[0009]

However, in the above-mentioned conventional configuration, the starting device of the AC induction motor for driving the refrigerant compressor uses the resistance change of the PTCR.
There is a problem that the starting torque is reduced due to the internal resistance of the CR.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a refrigerant compressor having improved starting performance.

Further, the above-mentioned conventional configuration has a problem that the loss of the motor is increased because the motor for driving the refrigerant compressor constituting the refrigeration cycle of the cooling device is an AC induction motor by the induction action of the rotor. I was

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned conventional problems. The efficiency of the refrigerant compressor is greatly improved by reducing the loss of the electric motor, thereby increasing the overall efficiency of the refrigeration cycle and increasing the power consumption of the cooling device. The purpose is to achieve reduction.

[0013]

According to a first aspect of the present invention, an electric element for driving a compression element is an induction synchronous motor having a starting device, and a rotor of the induction synchronous motor is operated at a synchronous speed. Therefore, since the loss due to the induction action of the rotor can be eliminated, there is an effect that the efficiency of the motor can be increased.

According to a second aspect of the present invention, in addition to the first aspect, a starting capacitor is connected to the auxiliary winding of the induction synchronous motor, so that the starting torque of the induction synchronous motor can be set high. It has the action of:

According to a third aspect of the present invention, there is provided a refrigerant compressor for compressing a refrigerant, a condenser for condensing the refrigerant, an expansion mechanism for expanding the refrigerant, and an evaporator for evaporating the refrigerant. Since the refrigerant compressor is the refrigerant compressor according to claim 1 or 2, the efficiency of the refrigerant compressor is increased by the induction synchronous motor, and the starting condenser can increase the starting torque of the induction synchronous motor. This has the effect that the refrigerant compressor can be started smoothly.

According to a fourth aspect of the present invention, in addition to the first or second aspect, the starting device of the induction synchronous motor further has a positive temperature coefficient of electric resistance and a sudden change in the resistance value at a predetermined temperature. Heat-sensitive element with
Since electric contacts are not used for the starting device of the induction synchronous motor,
There is an effect that there is no electric noise at the time of starting the refrigerant compressor and a smooth start without operating noise can be performed.

According to a fifth aspect of the present invention, in addition to the fourth aspect, the rated voltage of the induction synchronous motor is 100 V AC.
In use, the initial resistance value range of the thermal element is 2.5 to 5.0Ω, and by setting the electrical resistance of the thermal element to an appropriate range, the durability of the thermal element is maintained and the starting torque of the thermal element is reduced. It has the effect that the decrease can be suppressed.

According to a sixth aspect of the present invention, in addition to the fourth aspect, the rated voltage of the induction synchronous motor is 220 V AC.
In use, the initial resistance value range of the thermal element is set to 9.0 to 17.0Ω, and by setting the electric resistance of the thermal element to an appropriate range, the durability of the thermal element is maintained, and the starting torque of the thermal element is reduced. It has the effect that the decrease can be suppressed.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a refrigerant compressor according to the present invention. The same components as those in the related art are denoted by the same reference numerals, and detailed description is omitted.

(Embodiment 1) FIG. 1 is a refrigeration cycle diagram of a cooling device using a refrigerant compressor according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes an AC induction synchronous motor elastically supported by a spring 3 inside a closed container 2. This AC induction synchronous motor 1 includes a stator 4 and a rotor 5. Reference numeral 6 denotes a crankcase fixed to the stator 4. A crankshaft 7 supported by a crankcase 6 rotates a rotor 5 with a connecting rod 10 and a piston pin 1 on a piston 9 reciprocating in a cylinder 8 provided in the crankcase 6.
1 is transmitted. The refrigerant gas 12 compressed in the cylinder 8 is guided to a discharge pipe 14 provided in the closed container 2 through a discharge line 13 and discharged out of the refrigerant compressor 15.

The refrigerant gas 12 discharged from the discharge pipe 14 passes through a condenser 16, a dryer 17, an expansion mechanism 18, and an evaporator 19, which constitute a refrigeration cycle, to a suction pipe 20 provided in the closed container 2. Collected. Reference numeral 21 denotes refrigerating machine oil for lubricating each sliding portion of the refrigerant compressor 15 stored at the bottom of the closed casing 2.

FIG. 2 is an electric circuit diagram of the refrigerant compressor according to the embodiment of the present invention. In FIG. 2, reference numeral 1 denotes an induction synchronous motor that drives a refrigerant compressor. The stator 4 has a main winding 22 and a turn ratio to the main winding 22 of 1.
The auxiliary winding 23 is wound by 2 to 1.4 times. The main winding 22 is connected between wirings 25 and 26 to which an AC power supply 24 is applied, and the auxiliary winding 23 is connected in series with an operating capacitor 27, and is connected in wiring 25 with a starting device 28 and a starting capacitor 29 in series. , 26 are connected. Reference numeral 30 denotes a PTCR constituting the starting device 28. Reference numeral 31 denotes a device for preventing the temperature of the induction synchronous motor 1 from excessively rising.
It is arranged inside.

Next, Table 1 shows the operation efficiency of the induction synchronous motor used in the refrigerant compressor according to the embodiment of the present invention as a characteristic comparison table together with the conventional motor, the induction motor and the DC brushless motor. It is.

[0024]

[Table 1]

As shown in Table 1, the efficiency of the induction synchronous motor is 92% when the operation capacitor is provided, and 90% when the operation capacitor is not provided. D
The C brushless motor also has a high efficiency of 92%, but requires a control device for driving, and the actual overall efficiency including the circuit loss is about 85%.

FIG. 3 shows a speed-torque characteristic curve of an induction synchronous motor used in the refrigerant compressor of the embodiment according to the present invention.

In FIG. 3, reference numeral 31 denotes an output torque with respect to the rotation speed of the induction synchronous motor 1. The intersection between the dotted line indicated by reference numeral 32 and the X axis indicates the rotation speed at which the maximum torque 33 is generated. Reference numeral 34 denotes an output torque at which the rotor at the synchronous speed can rotate synchronously, and the maximum point indicates a step-out torque. Reference numeral 35 denotes a pulling-up torque, which is an output torque 3 in a low rotation range until synchronous rotation is achieved.
The drop of 1 becomes an obstacle when starting the refrigerant compressor.

The broken line 36 indicates the load torque of the refrigerant compressor 15. Reference numeral 37 denotes an electromagnetic induction torque generated by the main winding and the auxiliary winding, and the sum of the output torque 31 and the brake torque 38 generated by the permanent magnet incorporated in the rotor is used. This brake torque 38 is not seen when an induction motor is applied, and acts as a braking factor only when an induction synchronous motor is applied. Symbol 39
Is the point torque on the synchronous speed during the operation of the refrigerant compressor. Reference numeral 40 denotes a starting torque at zero speed.

FIG. 4 shows the capacitor capacity-starting torque characteristic of the induction synchronous motor used in the refrigerant compressor according to the embodiment of the present invention. 4, the starting torque of the induction synchronous motor 1 is proportional to the sum of the respective capacitances of the operating capacitor 27 and the starting capacitor 29 indicated by the X axis.

The starting torque is reduced when the sum of the capacitor capacities exceeds a certain value.

FIG. 5 shows a temperature-resistance characteristic of the PTCR constituting the starting device of the refrigerant compressor according to the embodiment of the present invention.

In FIG. 5, the intersection of the broken line 41 and the Y axis is the initial resistance value of the PTCR 30 constituting the starting device 28. The Y axis shows the resistance ratio to the initial resistance value at a temperature of 25 ° C.

The resistance value of the PTCR 30 has a characteristic that, while slightly decreasing as the temperature rises, the value rapidly increases near the Curie temperature (135 ° C.) indicated by the intersection of the broken line 43 and the X axis. I have. PTCR3 during motor operation
The in-use temperature (170 to 180 ° C.) indicated by the intersection of the dashed line 44 and the Y axis is held by the holding power of 0 itself. The in-use resistance value indicated by the broken line 45 is approximately 1 × 1 of the initial resistance value.
Since the value is maintained at an extremely high value of 5 times 0, it is possible to prevent the starting capacitor 29 from being energized.

FIG. 6 shows the temperature-saturation pressure characteristics of the refrigerant gas applied to the refrigeration cycle of the cooling device using the refrigerant compressor according to the embodiment of the present invention.

In FIG. 6, reference numerals 45 and 46 denote HFC-based refrigerant Freon 134a and CFC-based refrigerant Freon 12a.
Is the saturation pressure for each temperature. The intersection of the dashed line 47 and the X axis indicates the temperature of the cross point 48 where the saturation pressures of the Freon 134a and Freon 12 are the same. The saturation pressure of Freon 134a is high in a high temperature range at the cross point 48, and the saturation pressure of Freon 12 is high in a low temperature range. The temperature at cross point 48 is approximately 17 ° C.

The intersections between the broken lines 49 and 50 and the X axis indicate the lower limit temperature and the upper limit temperature of the evaporation temperature range 51 of the evaporator 19 during cooling of a refrigerator or the like widely used as a cooling device. The evaporation temperature range 51 is −30 ° C. to −
5 ° C.

The intersection of the dashed line 52 and the X-axis is
Is the ultimate temperature of the evaporator 19 when the heater is heated by a defrost heater (not shown) to periodically remove the frost attached to the evaporator 19.

The operation of the refrigerant compressor configured as described above will be described below. The induction synchronous motor 1 has a configuration (not shown) in which a permanent magnet is embedded in an iron core of a rotor having a cage secondary conductor similar to the induction motor used in the conventional refrigerant compressor 53. Then, after starting by the electromagnetic induction action of the cage conductor and performing synchronous pull-in, synchronous operation is performed using the magnetic flux of the permanent magnet. Therefore, there is no need for excitation during operation (the configuration of the magnetic circuit), so there is no need for power to excite like an induction motor, and the secondary conductor loss of the rotor due to operation at synchronous speed is also minimal, so refrigerant compression The refrigeration capacity of the machine is improved, and the operation input of the motor is reduced. As a result, the efficiency of the refrigerant compressor is improved.

The starting torque 40 of the induction synchronous motor 1 is
Is represented by the following equation: Ts∝4α · Im · Ia · sin θ where Ts: starting torque α: turns ratio Im: main winding current Ia: auxiliary winding current θ: vector angle of Im and Ia

By connecting a starting capacitor to the auxiliary winding of the induction synchronous motor and adjusting the capacitor capacity, the vector angle θ between the main winding current Im and the auxiliary winding current Ia becomes approximately 90 degrees.
The starting torque can be greatly improved by using a starting capacitor.

As described above, the refrigerant compressor of the present embodiment is provided with the closed container, the compression element in the closed container, and the electric element for driving the compression element, and the electric element is an induction synchronous motor. In addition, high efficiency of the refrigerant compressor can be achieved.

Also, since a starting capacitor is added to the auxiliary winding of the induction synchronous motor, the starting torque that covers the brake torque acting on the induction synchronous motor and overcomes the load torque is provided.
A pulling torque can be obtained, and the starting performance of the refrigerant compressor can be improved.

Also, since the HFC refrigerant is used in the refrigeration cycle of the cooling device, the refrigerant compressor can be started smoothly even under a high load after defrosting.

(Embodiment 2) FIG. 7 is a refrigeration cycle diagram of a cooling device using a refrigerant compressor according to Embodiment 2 of the present invention. The refrigerant is a hydrocarbon-based refrigerant (for example, Freon 600).
a) is applied. In FIG. 7, the refrigerant gas 53 is compressed by the refrigerant compressor 54, passes through the condenser 16, the dryer 17, and the expansion mechanism 18, absorbs heat in the evaporator 19, and returns to the refrigerant compressor 54 in order. Enclosed within.

As a motor for driving the refrigerant compressor 54, an induction synchronous motor is used. As shown in FIG. 2, a starting capacitor is connected to the auxiliary winding, and a PTC is used as a starting device.
The same electric circuit diagram using R is configured.

Next, Table 2 shows a characteristic table of refrigerant Freon 600a applied to the refrigerant compressor according to the embodiment of the present invention in comparison with HFC134a.

CFC 600a is for improving the global warming potential (referred to as GWP), which is a drawback of CFC 134a, and is 0 when GWP is 1 for CFC12. Also, Freon 600a has an ozone depletion potential (ODP)
Is 0 when Freon 12 is set to 1, which is an excellent refrigerant gas from the viewpoint of the global environment.

[0048]

[Table 2]

In Table 2, the refrigerant types of chlorofluorocarbon 600a and chlorofluorocarbon 134a were respectively set to 0 ° C., gas refrigerant volume, CE
The refrigerating capacity and the cylinder capacity of the refrigerant compressor are compared under the conditions of COMAF (European Refrigeration Manufacturers Committee).

The operation of the refrigerant compressor configured as described above will be described below.

The HC refrigerant 600a is HFC refrigerant Freon 13
Since the specific volume is twice as large as 4a, approximately twice the cylinder volume is required to generate the same refrigeration capacity. Freon 600a and Freon 13 having substantially the same refrigeration capacity
Since the compression work of the refrigerant compressor 4a is substantially equal, an induction synchronous motor having substantially the same output is applied. More specifically, since the cylinder capacity (movable weight of the components according to the cylinder capacity) becomes large, the load torque of the refrigerant compressor using Freon 600a increases at the same refrigeration performance. This difference in load torque tends to appear as an increase in load torque at the start.

Therefore, by applying the induction synchronous motor to the refrigerant compressor 54, the power consumption of the cooling device can be reduced, and the energy efficiency of the refrigeration cycle is greatly improved. The starting capacitor can increase the pull-up torque, so that the starting of the induction synchronous motor can be ensured. The initial resistance value range of the thermal element that constitutes the starting device of the induction synchronous motor is set to the optimum range, so the reliability of the starting device is improved. And a reduction in the starting torque of the induction synchronous motor can be suppressed.

(Embodiment 3) FIG. 8 shows the starting torque with respect to the initial resistance of the PTCR in the starting apparatus for a refrigerant compressor according to Embodiment 3 of the present invention.
The initial resistance value of the TCR is shown, and the Y axis represents the starting torque of the induction synchronous motor at the initial resistance value of the PTCR as a ratio. The motor used for the hermetic compressor is an induction synchronous motor,
The electric circuit diagram is the same as FIG.

In FIG. 8, the curves indicated by broken lines A and B represent the starting torque ratio with respect to the initial resistance value of the PTCR when the capacity of the starting capacitor in an induction synchronous motor having a rated voltage of 100 V is 40 and 120 μF. It shows a tendency that the starting torque decreases as the initial resistance value of the PTCR increases. Next, the solid lines C and D indicate that the capacity of the starting capacitor in the induction synchronous motor with the rated voltage of 220 V is 12,34 μF.
Is the starting torque ratio with respect to the initial resistance value of the PTCR in the case of. As with the 100-rated product, the starting torque tends to decrease as the initial resistance value of the PTCR increases.

The induction synchronous motor is wound so that the turn ratio of the auxiliary winding to the main winding is 1.2 to 1.4 times. The voltage induced in the auxiliary winding 23 of the induction synchronous motor 1 is 120 V when the voltage of the AC power supply 24 is 100 V.
Or 160V.

When the voltage of the AC power supply 24 is 100 V, the capacitance of the starting capacitor 29 is 40 to 120 μF. When the voltage of the AC power supply 24 is 220 V,
12 to 34 μF is commonly used.

FIG. 9 shows the operation time with respect to the initial resistance of the PTCR of the starting device of the refrigerant compressor according to the embodiment of the present invention. In FIG. 9, the curves indicated by broken lines a and b indicate the case where the capacity of the starting capacitor in the induction synchronous motor having the rated voltage of 100 V is 40 and 120 μF.
The starting time with respect to the initial resistance value of the PTCR is shown.
The operating time is the time from when the temperature of the PTCR rises to when the current to the starting capacitor is cut off. The starting time tends to become shorter as the initial resistance value of the PTCR increases. Next, solid lines c and d show the starting time with respect to the initial resistance value of the PTCR when the capacity of the starting capacitor in the induction synchronous motor having the rated voltage of 220 V is 12,34 μF. Like the 100-rated product, the starting time tends to be shorter as the initial resistance value of the PTCR increases.

A refrigerant compressor using an induction synchronous motor has a PT
When a starting device having a CR is used, the reduction of the starting torque due to the initial resistance value of the PTCR becomes an important problem. In setting the minimum starting torque of a refrigerant compressor used in a cooling device such as a refrigerator, it is necessary to consider fluctuations in power supply voltage and quality stability of an electric motor, and from this viewpoint, a starting torque ratio of 80% or more is required. It becomes.

From the above, referring to the characteristics of FIG.
The initial resistance value of the PTCR for obtaining a stable starting performance of the refrigerant compressor is 10Ω in the case of an induction synchronous motor having a starting capacitor for a rated voltage of 100 V, and is 220Ω.
It can be seen that the maximum value is 20Ω for an induction synchronous motor having a starting capacitor for V.

Further, if the PTCR operates with a rise in temperature before the start of the refrigerant compressor, a start error will occur and the start performance will be greatly affected. The time required for starting the refrigerant compressor used in a cooling device such as a refrigerator is approximately 0.5 s, and the operation time of 0.5 s or more is required to obtain a stable starting performance of the refrigerant compressor. Further, if the operation time of the PTCR is unnecessarily long, the power consumption of the motor at the time of starting increases, so that a maximum of 1.0 s is desirable.

From the above, referring to the characteristics of FIG.
The initial resistance of the PTCR for obtaining a stable starting performance of the refrigerant compressor is 2.5 to 5.0Ω in the case of an induction synchronous motor having a starting capacitor for a rated voltage of 100 V,
It can be seen that the rated voltage is 9.0 to 17.0Ω for an induction synchronous motor having a 220V starting capacitor.

Therefore, by applying a starting capacitor to the auxiliary winding of the induction synchronous motor and applying a PTCR having a limited initial resistance value to the starting device, a reduction in the starting torque of the induction synchronous motor is suppressed, and stable starting performance and stable start-up are achieved. Power consumption can be suppressed.

Further, since the starting device of the refrigerant compressor of this embodiment uses the PTCR as the disconnecting means of the starting capacitor, the temperature of the PTCR rises by self-heating by the starting current to the auxiliary winding and reaches the Curie temperature. As a result, the starting capacitor can be substantially disconnected by increasing the resistance value and blocking the inflow current, thereby eliminating the generation of electric noise and mechanical noise.

[0064]

As described above, according to the refrigerant compressor of the present invention, since the electric element driving the compression element is an induction synchronous motor, the refrigerant compressor can be operated with high efficiency. is there.

In the refrigerant compressor of the present invention, since the starting capacitor is connected to the auxiliary winding of the induction synchronous motor, the starting torque can be increased and the refrigerant compressor can be started smoothly.

In the refrigerant compressor of the present invention, the induction motor is used as the electric motor, and the starting capacitor is connected to the auxiliary winding, so that the power consumption of the cooling device can be reduced and the operation can be performed more smoothly.

Further, the starting device for a refrigerant compressor according to the present invention has an effect that the refrigerant compressor can be started smoothly without electric or acoustic noise.

The starting device for a refrigerant compressor according to the present invention is arranged such that the initial resistance value range of the heat-sensitive element is adjusted to the rated value of the induction synchronous motor.
Since the optimum range is set to 2.5 to 5.0Ω for 00V, the reliability is high and there is an effect that the starting torque of the induction synchronous motor is prevented from lowering.

The starting device for a refrigerant compressor according to the present invention is arranged so that the initial resistance value range of the heat-sensitive element is adjusted to the rated value of the induction synchronous motor.
Since the optimum range is set to 9.0 to 17.0 Ω for 20 V, the reliability is high and there is an effect of suppressing a decrease in the starting torque of the induction synchronous motor.

[Brief description of the drawings]

FIG. 1 is a refrigeration cycle diagram using a refrigerant compressor according to the present invention.

FIG. 2 is an electric circuit diagram of the refrigerant compressor of the embodiment.

FIG. 3 is a speed-torque characteristic diagram of the induction synchronous motor of the refrigerant compressor of the embodiment.

FIG. 4 is a diagram showing a relationship between a capacitor capacity and a starting torque of the induction synchronous motor of the refrigerant compressor according to the embodiment;

FIG. 5 is a temperature-resistance characteristic diagram of a heat-sensitive element of the starting device of the refrigerant compressor according to the embodiment.

FIG. 6 is a temperature-saturation pressure characteristic diagram of a refrigerant applied to the refrigerant compressor of the embodiment.

FIG. 7 is a refrigeration cycle diagram using a refrigerant compressor according to the present invention.

FIG. 8 is a diagram showing a resistance-starting torque characteristic of a heat-sensitive element of a starting device of a refrigerant compressor according to the present invention.

FIG. 9 is a diagram showing a resistance-operating time characteristic of a heat-sensitive element of the starting device of the refrigerant compressor according to the embodiment.

FIG. 10 is a refrigeration cycle diagram using a conventional refrigerant compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Induction synchronous motor 2 Airtight container 12 Refrigerant gas 15 Refrigerant compressor 16 Condenser 18 Expansion mechanism 19 Evaporator 23 Auxiliary winding 28 Starting device 29 Starting capacitor 30 Heat sensitive element 53 Refrigerant gas 54 Refrigerant compressor

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Tatsuyuki Iizuka 4-5-2-5 Takaidahondori, Higashiosaka-shi, Osaka Inside Matsushita Refrigerating Machinery Co., Ltd. F-term (reference) in Sangyo Co., Ltd. 3H003 AA02 AB03 AC03 CF04 5H001 AA02 AB02 5H619 AA13 BB01 BB06 PP31 5H621 AA01 BB07 BB08 GB10 HH01

Claims (6)

[Claims] 1. A refrigerant compressor comprising a compression element and an electric element for driving the compression element, wherein the electric element uses an induction synchronous motor having a starting device. 2. The refrigerant compressor according to claim 1, wherein a starting capacitor is connected to an auxiliary winding of the induction synchronous motor. 3. A refrigerant compressor comprising: a refrigerant compressor for compressing a refrigerant; a condenser for condensing the refrigerant; an expansion mechanism for expanding the refrigerant; and an evaporator for evaporating the refrigerant. A cooling device using the refrigerant compressor according to claim 1 or 2. 4. The starting device for an induction synchronous motor according to claim 1, wherein a temperature coefficient of the electric resistance is positive and a thermosensitive element having a characteristic that its resistance value changes rapidly at a predetermined temperature is used. A starting device for the refrigerant compressor according to claim 1. 5. The rated voltage of the induction synchronous motor is 100 AC.
5. The starting device for a refrigerant compressor according to claim 4, wherein the initial resistance value range of the thermosensitive element for V is 2.5 to 5.0Ω. 6. The rated voltage of an induction synchronous motor is AC 220
5. The starting device for a refrigerant compressor according to claim 4, wherein the initial resistance value range of the thermal element is set to 9.0 to 17.0Ω for V.