KR102249793B1 - Air conditioner and Control method of the same - Google Patents

Abstract

In the air conditioner of the present invention, a compression chamber is formed inside a cylinder in which a suction port and a discharge port are formed, and a driving part for compressing the compression chamber is connected to the rotation shaft of the motor to compress the refrigerant, and a discharge valve for opening and closing the discharge port is installed. A compressor; An outdoor heat exchanger connected to the compressor to exchange heat between outdoor air and refrigerant; An indoor heat exchanger connected to the compressor for exchanging indoor air with a refrigerant; An expansion mechanism installed between the outdoor heat exchanger and the indoor heat exchanger to expand the refrigerant; When the operation stop command is input or the thermo-off, it includes a control unit that cuts off the current applied to the motor when the rotation shaft is rotated beyond the set angle from the reference angle, and piping vibration or stress when the compressor is turned off can be minimized. There is an advantage of increasing the reliability while maximizing the life of the air conditioner.

Description

Air conditioner and control method of the same}

The present invention relates to an air conditioner and a method of operating the same, and more particularly, to an air conditioner having a compressor for compressing a refrigerant and a method of operating the same.

In general, an air conditioner maintains indoor air in a comfortable state for human life, and absorbs heat indoors, releases heat into the room, or maintains indoor cleanliness.

The air conditioner includes a compressor for compressing a refrigerant, an outdoor heat exchanger in which the refrigerant compressed by the compressor is condensed, an expansion mechanism for expanding the refrigerant condensed in the outdoor heat exchanger, and an indoor heat exchanger for evaporating the refrigerant expanded in the expansion mechanism. The room can be cooled or heated.

When the compressor is driven, the air conditioner can compress and discharge the refrigerant, and the refrigerant discharged from the compressor can flow to the outdoor heat exchanger through a pipe between the compressor and the outdoor heat exchanger. B It can be condensed by heat exchange with cooling water. The refrigerant condensed in the outdoor heat exchanger may flow to the expansion device after passing through a pipe between the outdoor heat exchanger and the expansion device, and may be expanded by the expansion device. The refrigerant expanded by the expansion mechanism may pass through a pipe between the expansion mechanism and the indoor heat exchanger to flow to the indoor heat exchanger, and may be evaporated by heat exchange with indoor air in the indoor heat exchanger. The refrigerant evaporated in the indoor heat exchanger may pass through a pipe between the indoor heat exchanger and the compressor and be sucked into the compressor.
When the refrigerant discharged from the compressor passes through the pipe, stress is generated in the pipe. The stress of the pipe greatly influences the life and performance of the air conditioner. In order to prevent the above problems, a conventional method for controlling a compressor has been proposed (Korean Publication No. 10-1996-0024117 (published on July 20, 1996)).
However, the conventional technology has a problem in that the effect is different when the operating conditions or the structure of the piping are different, and thus reliability is degraded.

Korean publication number 10-1996-0024117 (released on July 20, 1996)

An object of the present invention is to provide an air conditioner and a method of operating the same, which can maximize the life of the compressor so as to minimize the stress of the pipe, and thus maximize the lifespan.

In the air conditioner to achieve the above object, a compression chamber is formed inside a cylinder in which a suction port and a discharge port are formed, and a driving part for compressing the compression chamber is connected to a rotation shaft of a motor to compress the refrigerant, and the discharge port is opened and closed. A compressor having a discharge valve installed therein; An outdoor heat exchanger for exchanging heat between outdoor air and refrigerant; An indoor heat exchanger for exchanging indoor air with a refrigerant; An expansion mechanism for expanding a refrigerant between the outdoor heat exchanger and the indoor heat exchanger; A control unit that applies current to the motor when an operation command is input and the thermo-on is applied, and when the operation stop command is input or the thermo-off is performed, the current applied to the motor is cut off when the rotation shaft is rotated beyond a set angle from a reference angle. Includes.

An outdoor heat exchanger sensor sensing the temperature of the outdoor heat exchanger; An indoor heat exchanger sensor sensing the temperature of the indoor heat exchanger may be further included, and the control unit may block a current applied to the motor according to a temperature sensed by at least one of the outdoor heat exchanger sensor and the indoor heat exchanger sensor. have.

The set angle may be larger as the condensation temperature of the heat exchanger in which the refrigerant is condensed increases.

The control unit may cut off the current applied to the motor according to the number of revolutions per second before the current cut off of the motor.

The set angle may be larger as the number of rotations per second increases.

An outdoor heat exchanger sensor sensing the temperature of the outdoor heat exchanger; It may further include an indoor heat exchanger sensor for sensing the temperature of the indoor heat exchanger, the set angle is the condensation temperature sensed by the outdoor heat exchanger sensor or the indoor heat exchanger sensor, and the number of revolutions per second before the current cut off of the motor. It may be an angle determined by.

The method of operating an air conditioner according to the present invention includes the steps of applying a current to a motor of a compressor having a rotating shaft of the motor connected to a driving unit for compressing a compression chamber when a driving command is input and the temperature is turned on; When an operation stop command is input or the thermo-off is performed, blocking a current applied to the motor at a time when the rotation shaft of the compressor is rotated exceeding a set angle from a reference angle.

The set angle may be larger as the condensation temperature of the heat exchanger in which the refrigerant is condensed increases.

The set angle may be larger as the number of revolutions per second before the current cut-off of the motor increases.

The set angle may be an angle determined by a condensation temperature of a heat exchanger at which the refrigerant discharged from the compressor is condensed, and a rotation speed per second before the current is cut off by the motor.

The present invention has the advantage of minimizing piping vibration or stress when the compressor is turned off, maximizing the life of the air conditioner and increasing reliability.

1 is a diagram showing the configuration of an embodiment of an air conditioner according to the present invention;
2 is a longitudinal sectional view showing the inside of the compressor of an embodiment of the air conditioner according to the present invention;
3 is a plan view when the compression chamber of an embodiment of the air conditioner according to the present invention compresses a refrigerant;
4 is a control block diagram of an embodiment of an air conditioner according to the present invention.
5 is a graph showing an optimum off-angle according to the number of rotations per second of a rotation axis and a condensation temperature of an embodiment of the air conditioner according to the present invention.
6 is a flowchart of an embodiment of a method of operating an air conditioner according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram showing the configuration of an embodiment of an air conditioner according to the present invention, FIG. 2 is a longitudinal sectional view showing the inside of a compressor of an embodiment of the air conditioner according to the present invention, and FIG. 3 is a view showing the air conditioner according to the present invention. It is a plan view when the compression chamber of one embodiment of the conditioner compresses the refrigerant, Fig. 4 is a control block diagram of one embodiment of the air conditioner according to the present invention, and Fig. 5 is a rotation axis per second of an embodiment of the air conditioner according to the present invention. It is a graph showing the optimum off angle according to the number of rotations and condensation temperature.

The air conditioner includes a compressor (1) for compressing a refrigerant, an outdoor heat exchanger (5) for exchanging outdoor air with a refrigerant, an indoor heat exchanger (10) for exchanging indoor air with a refrigerant, and an outdoor heat exchanger (5). It may include an expansion mechanism 14 for expanding the refrigerant between the indoor heat exchanger (10).

In the air conditioner, the refrigerant may flow in the order of the compressor (1), the outdoor heat exchanger (5), the expansion mechanism (14), the indoor heat exchanger (6), and the compressor (1). The outdoor heat exchanger (5), the expansion mechanism (14), the indoor heat exchanger (10) and the compressor (1) can be flowed in order, and the outdoor heat exchanger (5) can function as a condenser to condense the refrigerant, and The heat exchanger 10 may function as an evaporator for evaporating the refrigerant.

The air conditioner may further include a cooling/heating switching valve 15 for switching between a cooling operation and a heating operation. When the air conditioner further includes a cooling/heating switching valve 15, it may be configured as a heat pump capable of selectively performing a cooling operation and a heating operation.

In the cooling operation of the air conditioner, the refrigerant is the compressor (1), the cooling/heating switching valve (15), the outdoor heat exchanger (5), the expansion mechanism (14), the indoor heat exchanger (10), the cooling/heating switching valve (15), and the compressor ( 1) It is possible to flow in order, and in this case, the outdoor heat exchanger 5 may function as a condenser for condensing the refrigerant, and the indoor heat exchanger 10 may function as an evaporator for evaporating the refrigerant.

During the heating operation of the air conditioner, the refrigerant includes the compressor (1), the cooling/heating switching valve (15), the indoor heat exchanger (10), the expansion mechanism (14), the outdoor heat exchanger (5), the cooling/heating switching valve (15), and the compressor ( 1) It is possible to flow in order. In this case, the indoor heat exchanger 10 may function as a condenser for condensing the refrigerant, and the outdoor heat exchanger 5 may function as an evaporator for evaporating the refrigerant.

Hereinafter, the detailed configuration of the air conditioner will be described in detail as an example in which the air conditioner is a heat pump.

The compressor 1 may be connected to a compressor suction passage 2 through which the refrigerant passing through the cooling/heating switching valve 15 is sucked into the compressor 1. The compressor suction passage 2 may be connected to the cooling/heating switching valve 15. An accumulator 3 in which a liquid refrigerant is accumulated may be installed in the compressor suction passage 2. A compressor discharge passage 4 through which the refrigerant compressed by the compressor 1 is discharged to the cooling/heating switching valve 10 may be connected to the compressor 1. The compressor discharge passage 4 may be connected to the cooling/heating switching valve 15. Each of the compressor suction passage 2 and the compressor discharge passage 4 has a pipe connected to the compressor 1, and the vibration of the compressor 1 can be transmitted to the compressor suction passage 2 and the compressor discharge passage 4 .

The outdoor heat exchanger 5 may be connected to the expansion device 14 and the outdoor heat exchanger expansion device connection passage 6. The air conditioner may further include an outdoor fan 7 for blowing outdoor air to the outdoor heat exchanger 5. An outdoor heat exchanger sensor 8 for sensing the temperature of the outdoor heat exchanger 5 may be installed in the outdoor heat exchanger 5.

The indoor heat exchanger 10 may be connected to the expansion device 14 and the indoor heat exchanger expansion device connection passage 11. The air conditioner may further include a blower fan 12 for blowing indoor air to the indoor heat exchanger 10. An indoor heat exchanger sensor 13 for sensing the temperature of the indoor heat exchanger 10 may be installed in the indoor heat exchanger 10.

The expansion device 14 may be installed between the outdoor heat exchanger 5 and the indoor heat exchanger 10 by the outdoor heat exchanger expansion device connection passage 6 and the indoor heat exchanger expansion device connection passage 11. Of course, the number of expansion mechanisms 14 may be installed, and a plurality of the expansion mechanisms 14 may be connected by a liquid pipe.

The cooling/heating switching valve 15 may be connected to the outdoor heat exchanger 5 and the outdoor heat exchanger connection passage 16, and may be connected to the indoor heat exchanger 10 and the indoor heat exchanger connection passage 17.

Hereinafter, the compressor 1 will be described in detail as follows.

The compressor 1 may be a compressor having a rotating shaft 42 that is rotated, and may be composed of a rotary compressor or a reciprocating compressor.

The compressor 1 may include a cylinder 26 having a suction port 24 and a discharge port 25 formed therein. The cylinder 26 may have a compression chamber 28 formed therein. The suction port 24 and the discharge port 25 may be formed at spaced positions of the cylinder 26, and each of them may be in communication with the compression chamber 28. The compressor 1 may include a driving unit 30 for compressing the compression chamber 28. The compressor 1 may include a motor 40 that rotates the driving unit 30. The motor 40 may have a rotation shaft 42 connected to the driving unit 30. When a current is applied to the motor 40 and the rotation shaft 42 is rotated, the rotation shaft 42 may operate the driving unit 30, and the driving unit 30 may compress the refrigerant in the compression chamber 28. The compressor 1 may further include a discharge valve 50 for opening and closing the discharge port 25.

The compressor 1 may be classified into a rotary compressor and a reciprocating compressor according to an operation method of the driving unit 30.

The compressor 1 may include a case 21. The case 21 of the compressor 1 may constitute a shell of the compressor 1. The compressor 1 may include an upper cap 22 installed on the case 21. A compressor discharge passage 4 may be installed in the upper cap 22, and the refrigerant compressed in the compressor 1 may flow into the compressor discharge passage 4. The compressor 1 may include a lower cap 23 installed under the case 21.

The cylinder 26 may have a space in which the driving unit 30 is rotatably accommodated. The cylinder 26 is formed in a hollow shape and has a cylinder body 31 having a space in which the driving unit 30 is rotatably accommodated, and is disposed on the cylinder body 31 to enable the rotation shaft 42 to be rotatable. It may include an upper bearing 32 supporting, and a lower bearing 33 disposed under the cylinder body 31 and rotatably supporting the rotation shaft 42. The upper bearing 32 and the lower bearing 33 may form a compression chamber 28 together with the cylinder body 31, each of which may support the rotation shaft 42 so as to be rotatable.

The suction port 24 may be formed in at least one of the cylinder body 31 and the lower bearing 33, and one end thereof may face the inside of the compression chamber 28. The compressor suction passage 2 may be connected to the suction port 24, and the refrigerant may be sucked into the compression chamber 28 after passing through the compressor suction passage 2 and the suction port 24 in sequence.

The discharge port 25 may be formed in at least one of the cylinder body 31 and the upper bearing 32, and one end thereof may face the inside of the compression chamber 28.

The driving unit 30 may include an eccentric portion 34 installed on the rotation shaft 42 and a roller 36 installed on the eccentric portion 34 and in rolling contact along the inner wall of the cylinder 26. The eccentric part 34 may be an eccentric cam provided on the rotation shaft 42.

The motor 40 may include a stator 44 installed in the case 21 and a rotor 46 that is rotatably disposed on the stator 11. The rotation shaft 42 may be fixed to the rotor 46 and may be rotated together with the rotor 44. The rotation shaft 42 may be a drive shaft that drives the compressor 1, and when the rotation shaft 42 is rotated by applying current to the motor 40, the compressor 1 may compress the refrigerant.

When the pressure in the compression chamber 28 is higher than a predetermined pressure, the discharge valve 50 may be deformed by the pressure in the compression chamber 28 to open the discharge port 25, and the pressure in the compression chamber 28 is predetermined. When the pressure is lowered below the pressure, elasticity is restored and the discharge port 25 may be shielded.

The compressor 1 may further include a vane 52 installed in the cylinder 26 and in contact with the roller 36. The vane 52 is tangent to the spring 54 installed in the cylinder 26 and may be in constant contact with the roller 36. In the compressor 1, the space of the cylinder 26 may be divided into two spaces by a vane 36 and a vane 52. The space of the cylinder 26 may be divided into a suction space communicating with the suction port 24 and a discharge space communicating with the discharge port 25.

When the motor 40 is driven, the refrigerant may sequentially pass through the compressor suction passage 2 and the suction port 24 to be introduced into the compression chamber 28, and the refrigerant in the compression chamber 28 is the driving unit 30 Can be compressed by When the pressure in the compression chamber 28 becomes a high pressure for opening the discharge valve 50, the discharge valve 50 may be opened to open the discharge port 25. When the discharge port 25 is opened, the high-pressure refrigerant compressed in the compression chamber 28 may be discharged through the discharge port 25 and the compressor discharge passage 4.

In the compressor 1, the pressure between the roller 36 and the discharge port 25 may be different depending on the angle θ of the roller 36, and accordingly, the stress applied to the pipes 2 and 4 and The vibrations can also be different. Here, the angle θ of the roller 36 is an angle at which the roller 36 rotates with respect to the vane 52.

Meanwhile, the compressor 1 may be configured as a reciprocating compressor, and in this case, the drive unit 30 includes a piston that advances and retreats to the cylinder 26, and a crankshaft to which the piston is connected and advances and retreats the piston to the cylinder 26. I can.

The air conditioner may include a control unit 80 for controlling the compressor 1. The air conditioner may further include an input unit 82 for inputting a driving command. The air conditioner may further include an indoor temperature sensor 84 that senses the temperature of the room air-conditioned by the air conditioner. The controller 80 may operate the air conditioner when a driving command is input and the temperature is turned on. When a driving command is input and the temperature is on, the controller 80 may drive the compressor 1 to operate the air conditioner. When the compressor 1 is driven, the controller 80 may apply a current to the motor 40 of the compressor 1. The controller 80 may stop the compressor 1 when an operation stop command is input or the thermo-off is performed while the compressor 1 is being driven. When the compressor 1 is stopped, the controller 80 may cut off the current applied to the motor 40 of the compressor 1.

The driving command may be a command input by the user through the input unit 82 to operate the air conditioner.

The operation stop command may be a command input through the input unit 82 to stop the operation of the air conditioner by the user, or may be a command for the air conditioner to stop the operation of the air conditioner by itself in a special situation.

Thermo-on is when the temperature of the room that the air conditioner controls is out of the desired temperature. In the case of cooling operation, the thermo-temperature may be a condition in which the temperature detected by the indoor temperature sensor 84 is higher than the desired indoor temperature range, and the indoor temperature is the upper limit of the desired temperature (for example, the desired temperature + 0.5°C or the desired temperature). + 1 ℃) may be higher than the temperature. In the case of heating operation, the thermo-on may be a condition in which the temperature sensed by the indoor temperature sensor 84 is lower than the desired indoor temperature range, and the indoor temperature is the lower desired temperature limit (for example, the desired temperature-0.5°C or the desired temperature- 1°C) may be lower than the temperature.

The thermo-off is a case in which the temperature of the room that the air conditioner controls the air satisfies the desired temperature. In the case of cooling operation, the thermo-off may be a condition in which the temperature sensed by the indoor temperature sensor 84 is lower than the desired indoor temperature range, and the indoor temperature is the lower limit of the desired temperature (for example, the desired temperature-0.5°C or the desired temperature. -It may be a temperature lower than 1℃). In the case of heating operation, the thermo-off may be a condition in which the temperature detected by the indoor temperature sensor 84 exceeds the desired indoor temperature range, and the indoor temperature is the upper limit of the desired temperature (for example, the desired temperature + 0.5°C or the desired temperature). + 1 ℃) may be higher than the temperature.

The air conditioner transfers the refrigerant from the compressor (1) to the heat exchanger (5) (10) through the pipes (2) (4), and the vibration and stress of the pipes (2) (4) extend the life and performance of the air conditioner. It can have a great influence on how to influence.

When the compressor (1) is driven, a load may be applied to the pipes (2) (4) connected to the compressor (1) by the flow of refrigerant and the vibration of the compressor (1), and a stress is applied to the pipes (2) (4). do. It is preferable that the air conditioner minimizes the stress of the pipes 2 and 4 caused by the vibration of the compressor 1 and the vibration of the compressor 1 that occurs when the compressor 1 is stopped.

While the stress of the pipes 2 and 4 is not relatively high during the driving of the compressor 1, it may be large due to the inertial force when the compressor 1 is started or when the compressor 1 is stopped.

It is preferable that the compressor 1 is stopped so that the stress of the pipes 2 and 4 acting upon the stop of the compressor 1 is minimized, and when the stress of the pipes 2 and 4 is minimized, the compressor 1 It is desirable to cut off the current applied to ).

The air conditioner may have different stresses in the pipes 2 and 4 when the compressor 1 is stopped depending on the number of rotations per second of the motor before the compressor 1 is stopped. The air conditioner may have different stresses in the pipes 2 and 4 when the compressor 1 is stopped, depending on the discharge pressure between the roller 36 and the discharge port 25 before the compressor 1 is stopped. In the air conditioner, the higher the condensation temperature is, the higher the discharge pressure between the roller 36 and the discharge port 25 may be. The air conditioner may have different stresses in the piping (2) (4) when the compressor (1) is stopped depending on the number of revolutions per second of the motor and the condensation temperature, and the condensation temperature before the compressor (1) is stopped and the number of revolutions per second of the motor Accordingly, the optimum off-angle at which the stress of the pipes 2 and 4 is minimized may be determined.

The condensation temperature may be the temperature of the outdoor heat exchanger 5 detected by the outdoor heat exchanger sensor 8 during cooling operation. The condensing temperature may be the temperature of the indoor heat exchanger detected by the indoor heat exchanger sensor 13 during heating operation.

The number of rotations per second of the motor may be the number of rotations of the rotating shaft 42 per second before the compressor 1 is stopped. The control unit 80 may detect the number of revolutions per second of the rotating shaft 42 through a sensor installed in the motor 40. The controller 80 may vary the number of revolutions per second of the motor 40 according to the current value applied to the motor 40. It goes without saying that the control unit 80 can detect the number of revolutions per second of the rotation shaft 42 from the current value applied to the motor 40 before the current applied to the motor 40 is cut off.

In addition, the optimum off-angle (A°) may be an angle in which the roller 26 is rotated from the reference angle (0°) at a point in time when the stress of the pipes 2 and 4 is minimized when the compressor 1 is stopped. . Here, the reference angle (0°) may be an angle used as a reference for controlling the rotation of the roller 26. The reference angle (0°) may be an angle at which the roller 36 is positioned when the vane 52 is maximally retracted by the roller 36. In addition, the optimum off-angle (A°) may be a set angle (A°) set to minimize the stress of the pipes (2) and (4) when the compressor (1) is stopped.

The control unit 80 applies current to the motor 40 when the operation command is input and the thermo-on, and when the operation stop command is input or the thermo-off, the rotation shaft 42 is set from the reference angle (0°) to the set angle (A°). The current applied to the motor 40 may be cut off at the time of excessive rotation.

The controller 80 may block a current applied to the motor 40 according to a temperature sensed by at least one of the outdoor heat exchanger sensor 8 and the indoor heat exchanger sensor 13. The temperature sensed by at least one of the outdoor heat exchanger sensor 8 and the indoor heat exchanger sensor 13 may be a factor that determines when to cut off the current applied to the motor 40.

The controller 80 may cut off the current applied to the motor 40 according to the number of revolutions per second before the current cut off of the motor 40. The number of revolutions per second before the current cut-off of the motor 40 may be a factor that determines when to cut off the current applied to the motor 40.

Referring to FIG. 5, the setting angle A° may be larger as the condensation temperature of the heat exchanger in which the refrigerant is condensed is higher. Referring to FIG. 5, the setting angle A° may be larger as the number of revolutions per second before the current cut-off of the motor 40 increases. The set angle (A°) may be one angle determined by the condensation temperature sensed by the outdoor heat exchanger sensor 8 or the indoor heat exchanger sensor 13, and the number of revolutions per second before the current cut-off of the motor 40.

The air conditioner may have a different setting angle (A°) depending on the condensation temperature of the heat exchanger at which the refrigerant is condensed at the time when the compressor 1 is to be stopped and the number of revolutions per second before the current cut-off of the motor 40. That is, the set angle (A°) may be a variable set angle that is variably set according to the condensation temperature of the heat exchanger at which the refrigerant is condensed and the number of revolutions per second before the motor 40 cuts off current.

6 is a flowchart of an embodiment of a method of operating an air conditioner according to the present invention.

The operating method of the air conditioner according to the present embodiment is the motor of the compressor 1 to which the rotation shaft 42 of the motor 40 is connected to the driving unit 30 for compressing the compression chamber 28 when an operation command is input and the thermo-on is performed. 40) may include the steps of applying current (S1) (S2) (S3).

The air conditioner may start applying a current to the motor 40 of the compressor 1 when a power command is input to the input unit 82 and the thermostat is turned on, and the compressor 1 may be turned on. S1)(S2)

In the air conditioner, the speed of the compressor 1 may be controlled according to the load after the compressor 1 is turned on. (S3) The air conditioner keeps the compressor 1 on the load until an operation stop command is input or the thermo-off is turned off. You can drive along.

The operating method of the air conditioner according to the present embodiment is, when an operation stop command is input or the thermo-off, the motor is rotated at a time when the rotation shaft 42 of the compressor 1 is rotated from the reference angle (0°) to exceed the set angle (A°). Blocking the current applied to (40) (S4) (S5) and (S6) may be included.

The set angle (A°) may be larger as the condensation temperature of the heat exchanger in which the refrigerant is condensed increases.

The set angle (A°) may be larger as the number of revolutions per second before the current cut-off of the motor 40 increases. The set angle (A°) may be an angle determined by the condensation temperature of the heat exchanger at which the refrigerant discharged from the compressor 1 is condensed, and the number of revolutions per second before the current cut-off of the motor 40.

During cooling operation of the air conditioner, the heat exchanger in which the refrigerant is condensed may be the outdoor heat exchanger (5), and the setting angle (A°) is the higher the temperature of the outdoor heat exchanger (5), the larger the setting angle (A°). I can. During the heating operation of the air conditioner, the heat exchanger in which the refrigerant is condensed may be the indoor heat exchanger 10, and the setting angle (A°) increases as the temperature of the indoor heat exchanger 10 increases. I can.

1: compressor 5: outdoor heat exchanger
8: outdoor heat exchanger sensor 10: indoor heat exchanger
13: indoor heat exchanger sensor 15: expansion mechanism
24: suction port 25: discharge port
26: cylinder 28: compression chamber
40: motor 42: rotating shaft
50: discharge valve 80: control unit

Claims (10)

A compressor having a compression chamber formed inside a cylinder in which a suction port and a discharge port are formed, and a driving part for compressing the compression chamber is connected to a rotation shaft of a motor to compress a refrigerant, and a discharge valve for opening and closing the discharge port;
An outdoor heat exchanger for exchanging heat between outdoor air and refrigerant;
An indoor heat exchanger for exchanging indoor air with a refrigerant;
An expansion mechanism for expanding a refrigerant between the outdoor heat exchanger and the indoor heat exchanger;
A control unit that applies current to the motor when an operation command is input and the thermo-on is applied, and when the operation stop command is input or the thermo-off is performed, the current applied to the motor is cut off when the rotating shaft is rotated beyond a set angle from the reference angle. Air conditioner included. The method of claim 1,
An outdoor heat exchanger sensor sensing the temperature of the outdoor heat exchanger;
Further comprising an indoor heat exchanger sensor for sensing the temperature of the indoor heat exchanger,
The control unit is an air conditioner that cuts off a current applied to the motor according to a temperature sensed by at least one of the outdoor heat exchanger sensor and the indoor heat exchanger sensor. The method of claim 2,
The set angle is larger as the condensation temperature of the heat exchanger in which the refrigerant is condensed is higher. The method of claim 1,
The control unit is an air conditioner that cuts off the current applied to the motor according to the number of revolutions per second before the current cut off of the motor. The method of claim 4,
The setting angle is an air conditioner that is larger as the number of revolutions per second increases. The method of claim 1,
An outdoor heat exchanger sensor sensing the temperature of the outdoor heat exchanger;
Further comprising an indoor heat exchanger sensor for sensing the temperature of the indoor heat exchanger,
The set angle is an angle determined by the condensation temperature sensed by the outdoor heat exchanger sensor or the indoor heat exchanger sensor, and the number of revolutions per second before the current cut-off of the motor. When a driving command is input and the temperature is turned on, applying a current to a motor of a compressor having a rotating shaft of the motor connected to a driving unit for compressing the compression chamber;
And interrupting the current applied to the motor when the operation stop command is input or the thermo-off is performed when the rotation shaft of the compressor is rotated beyond a set angle from a reference angle. The method of claim 7,
The setting angle is a method of operating an air conditioner that is larger as the condensation temperature of the heat exchanger in which the refrigerant is condensed is higher. The method of claim 7,
The operating method of the air conditioner as the set angle increases as the number of revolutions per second before the current cut-off of the motor increases. The method according to any one of claims 7 to 9,
The set angle is an angle determined by a condensation temperature of a heat exchanger at which the refrigerant discharged from the compressor is condensed, and a rotation speed per second before the current is cut off by the motor.

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